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Lipo Fire Incidents and How they Occur

Old 10-06-2005, 04:45 AM
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hoppy
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Default Lipo Fire Incidents and How they Occur

Disclaimer: It should be noted that Incidents reported as Undetermined and Unknown are due to the lack of forensic evidence being supplied. Spontaneous lithium incidents, while frequently claimed, have never been verified. All incidents associated with batteries have a cause. Moderator


This represents posts that I have seen where a LiPo pack has caught fire. They have been placed in several categories.

FIRE DURING CHARGING:
Operator Error-
9s pack catches fire while being charged at 10s setting. (9)
2s pack catches fire being charged as 3s (10)
2s pack catches fire when charged at 3s setting (13)
2s pack catches fire in plane while charging at 3s setting. (22)
3s pack charged at 4s voltage ignites (27)
2s pack catches fire charged at 3s (30)
2s pack ignites when charged at 10.2V (31)
Overcharged battery (34)
2s pack charged at 11.1V catches fire. (36)
2s pack charged at 3s setting (40)
2s pack charges at 11.1V burns – (44)
2s charged at 11.2V goes off in garage – (47)
2s charged at 3s voltage ignites in garage – (49)
2s charged at 3s ignites in workshop – (52)
Another count problem – Heli burns (57)
Cell count error caused fire – (61, 62)
Pack charged on NiCd setting - (66)
Run Down pack catches fire during charge – (71)
LiPo Burns during charge on 109 charger after mode mis-set (82)
Charging slightly swelled pack causes fire (86)
Li-Ion cells catch fire from charger setting error (88)
Cell catches fire during attempt to repeak - (91)
Charging puffed cell causes it to ignite – (93)
Lipo burns during attempt to restore overdischarged cell with CC/CV PS (94)
Pack ignites during charging – smoke corrodes shed and contents (98)
Possible damaged pack burns like rocket in can – (100)
Attempt to recharge dead lipo causes plane fire (103)
Charging probably fully charged 3s pack with Astro 109 result in pack ignition. (104)
2s charged as 3s ignites in safe (109)
Restart of charger resulted in wrong charge mode – (113)
Wrong charger settings burns 2 packs – (112)
LiPo burns in modelers hand after charging - (115)
Charging slightly puffed cell causes fire, plane burns (117)
Owner forgot to change charger setting from NiCd to Lipo during charging cycle (118)

Undetermined Cause While Charging
Fire damages garage while charging pack. (7)
1500 3s pack catches fire during 1A , 11.1V initial charge. (1)
2 cell pack ignites while being charged with 2 cell charger. (11)
Car burns when pack being charged in car catches fire. (24)
2s2p pack catches fire in helicopter - possible that charger misread # of cells. (25)
2s pack ignites while on charger set for 2s. (28)
$30,000 damage to house when pack ignites during charging. (no details) (43)
3s pack burns in garage - (35)
3s pack burns at correct settings- (41)
3s pack burns at correct charger settings - (46)
3s 8000mah pack catches fire after 15min - correct settings - (53)
Helicopter and pack burns after 15min charge - (54)
Automatic cell count charger - pack catches fire (55)
Automatic cell count charger - pack catches fire (56)
Lipo rockets across room (58)
Automatic cell count charger - Lipos burn in garage (59)
Battery ignites in car seat during charging (63)
Damaged battery ignites during charge (67)
Pack balloons during charge, burns while under water (68)
11s3p pack burns during charging at correct parameters (70)
Another charging fire - (72)
Helicopter burns when LiPo ignites during charge (73)
Undetermined cause to LiPo fire during charge - (74)
Chopper burns from charging LiPo fire (76)
House fire (81)
3s Pack Ignites burning front of car during charge at correct settings. (83)
Helicopter in garage burns while charging (106)
Well used Lipo ignites under correct charging parameters (107)
SUV Vehicle burns (114)

FIRE FROM PACK DAMAGE:
Cell poked with exacto knife catches fire- (2)
Dog bites pack, pack catches fire (4)
Lexus burns after pack from crashed plane put in car. (8)
Ballooned pack ignites when punctured. (20)
Repaired pack catches fire when connected to plane. (29)
Pack catches fire after plane crashes. (37)
Pack cut while shrink wrapping (39)
Pack punctured during crash burns. (64)
Plane crashes, pack removed and 10 minutes later burns (65)
Battery pack at 1V ignites while charging (71)
Puffed pack ignites during charging – (77)
Puffed Pack smokes when punctured (79)
Nicked pack catches fire (87)
Plane crashes, battery catches fire (89)
Damaged pack catches fire – (90)
Dog chews pack, chars pillow and smokes house - (95)
Battery compartment screw penetrates pack causing loss of plane (102)
Pack balloons dring mischarge, ignites when punchured (108)
Pack ignites 20 min after Heli crash – (111)\
Nicked pack “explodes in modelers hand” (116)

BATTERY SHORTED FIRES:
Shorted pack catches fire (26)
Pack burns after shorting (15)
Possible Short (38)
Shorted when moved on table – (42)
Pack Shorted putting connector on and burns – (45)
Shorted pack burns hole in BMW seat – (48)
Crash causes 3s pack to short and burn – (50)
Pack ignites sometime after connector shorted for a short time (85)

CAUSE UNDETERMINED:
Multi cell pack catches fire in flight (5)
Possible over discharge (33)
Lipo pack catches fire in car (60)
2s pack starts house fire (84)
In flight F3A fire reported (92)
New pack partially burns sitting on desk (96)
Pack ignites with no known cause (97)
Pack ignites after soldering wires on (101)
Pack catches fire in pick up truck (105)OTHER
2s pack connected in series with 3s pack ignites in fireball (78)
Lipo burns garage (99)
Packs used in parallel catch fire in flight (110)

Last edited by Red Scholefield; 11-15-2005 at 08:10 PM.
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Old 10-06-2005, 04:47 AM
  #2  
hoppy
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1. http://www.rcgroups.com/forums/showt...93#post1625193
2. http://www.rcgroups.com/forums/showt...&pagenumber=18
3. http://www.rcgroups.com/forums/showt...37#post1531337
4. http://www.rcgroups.com/forums/showt...99#post1531599
5. http://www.bayrc.com/boards/viewtopic.php?t=226
6. http://www.rcgroups.com/forums/attac...postid=1478616
7. http://www.rcgroups.com/forums/showt...fire+explosion
8. http://www.rcgroups.com/forums/showt...ght=lexus+fire
9. http://www.rcgroups.com/forums/showt...t=funtana+fire
10. http://www.rcgroups.com/forums/showt...ghlight=rocket
11. http://www.ikarus-modellbau.de/ubbth...b=5&o=&fpart=1
12. http://www.rcgroups.com/forums/showt...ight=lipo+fire
13. http://www.rcgroups.com/forums/showt...hreadid=160086
14. http://www.rcgroups.com/forums/showt...hreadid=160079
15. http://www.rcgroups.com/forums/showt...hreadid=160551
16. http://www.rcgroups.com/forums/showt...ight=lipo+fire
17. http://www.rcgroups.com/forums/showt...ight=lipo+fire
18. http://www.rcgroups.com/forums/showt...ight=lipo+fire
19. http://www.rcgroups.com/forums/showt...ight=lipo+fire
20. http://www.rcgroups.com/forums/showt...ight=lipo+fire
21. http://www.rcgroups.com/forums/showt...ight=lipo+fire
22. http://www.rcgroups.com/forums/showt...ight=lipo+fire
23. http://www.rcgroups.com/forums/showt...402#post806402
http://www.rcgroups.com/forums/showt...ight=lipo+fire
http://www.rcgroups.com/forums/showt...ight=lipo+fire
24. http://www.hornet-heli.com/ubb/Forum3/HTML/003428.html
25. http://www.rcgroups.com/forums/showt...ight=explosion
26. http://www.rcgroups.com/forums/showt...95#post1243595
27. http://www.rcgroups.com/forums/showt...90#post1571890
28. http://www.rcgroups.com/forums/showt...30#post1581630
29. http://www.rcuniverse.com/forum/fb.a...325&tostyle=tm
30. http://www.rcgroups.com/forums/showt...129#post844129
31. http://www.rcgroups.com/forums/showt...29#post1553429
32. http://www.rcgroups.com/forums/showt...65#post1658165
http://www.rcgroups.com/forums/showt...hreadid=185530
33. http://www.rcgroups.com/forums/showt...34#post1699734
34. http://www.rcgroups.com/forums/showt...91#post1731091
http://www.rcgroups.com/forums/showt...15#post1731915
35. http://www.rcuniverse.com/forum/fb.a...352&tostyle=tm
36. http://members.jcom.home.ne.jp/42232...%20trouble.htm
http://www.rcgroups.com/forums/showt...31#post1761331
Charging crashed pack caused pack unbalance problems - http://www.rcgroups.com/forums/showt...03#post1767503
37. Pack catches on fire after crash - http://www.rcgroups.com/forums/showt...34#post1779434
38. Possible short – undamaged pack catches fire -http://www.rcgroups.com/forums/showthread.php?postid=1810304#post1810304
39. Battery shorts and burns during shrink wrapping - http://www.rcgroups.com/forums/showt...08#post1399608
Lipo Fire Video’s
http://www.rcgroups.com/forums/showt...15#post1394715
http://www.rcstuff.us/battery/lipo/lipo_DNA.html
http://www.helihobby.com/videos/LithiumBattery.wmv
Threads they came from:
http://www.rcgroups.com/forums/showt...ipo+fire+video
http://www.rcgroups.com/forums/showt...5&pagenumber=1
(40) Battery catches fire, wrong charging voltage - http://www.rcgroups.com/forums/showt...22#post1898922
(41) First charge of pack - http://www.rcgroups.com/forums/showt...hreadid=180434
(42) Pack shorted on bench - http://www.rcgroups.com/forums/showt...hreadid=206095
(43) $30,000 house damage – charger error - http://www.rcgroups.com/forums/showt...90#post1816790
(44) 2s charged at 11.1V burns - http://www.rcgroups.com/forums/showt...47#post1844047
(45) Pack Shorted putting connector on and burns - http://www.rcgroups.com/forums/showt...hreadid=209532
(46) 3s Pack burns at correct charger settings - http://www.rcgroups.com/forums/showt...hreadid=209767
Picture of burned bench – German site - http://www.modellflugjugend.de/archiv/user/lipo2.jpg
(47) 2s charged at 3s goes boom in garage - http://www.rcgroups.com/forums/showt...hreadid=100803
(48) Shorted pack burns hole in BMW seat - http://www.rcgroups.com/forums/showt...86#post1199486
(49) 2s charged as 3s ignites in house - http://www.rcgroups.com/forums/showt...ghlight=rocket
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Old 10-06-2005, 04:47 AM
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(50) Crash causes 3s to short and burn
http://www.rcgroups.com/forums/showt...82#post1863182
(52) 2s charging at 3s causes fire in garage -
http://www.runryder.com/helicopter/...light=fire+lipo
(53) 8000 3s pack catches fire at correct settings -
http://www.runryder.com/helicopter/...light=fire+lipo
(54) Pack catches fire after charging for 15 min -
http://www.rotory.com/ubbthreads/sh...o=&fpart=1&vc=1
(55) Pack catches fire using automatic charger - http://www.rcgroups.com/forums/showp...6&postcount=15
(56) Pack catches fire using automatic charger -
http://www.rcgroups.com/forums/showp...46&postcount=1
(57) Helicopter fire - http://runryder.com/helicopter/t82226/?goto=newpost
(58) LiIon pack rockets across room: http://www.rcgroups.com/forums/showp...6&postcount=11
(59) Dented Pack Catches fire - http://www.rcgroups.com/forums/showp...56&postcount=3
(60) Lipo in closed car catches fire - http://www.rcgroups.com/forums/showthread.php?t=241627
(61) Wrong cell count fire - http://www.rcgroups.com/forums/showp...97&postcount=3
(62) Wrong cell count fire – http://www.rcgroups.com/forums/showp...26&postcount=1
(63) Battery catches fire in car seat while charging - http://www.rcgroups.com/forums/showthread.php?t=248194
(64) Battery catches fire when plane crashes - http://www.rcgroups.com/forums/showthread.php?t=256098
(65) Battery catches fire after crash: http://www.rcgroups.com/forums/showp...7&postcount=12
(66) Battery ignites in under 10min on charger - http://www.rcgroups.com/forums/showp...59&postcount=1
(67) Damaged battery catches fire during charging - http://www.rcgroups.com/forums/showp...34&postcount=5
(68) LiPo Pack catches fire even tho immersed in salt water - http://www.rcgroups.com/forums/showthread.php?t=261922
(69) Lipo ignition causes house fire - http://www.rcgroups.com/forums/showp...50&postcount=4
(70) Pack catches fire for no apparent reason during charge - http://www.rcgroups.com/forums/showp...1&postcount=34
(71) Pack at 1V charged and catches fire - http://www.rcgroups.com/forums/showthread.php?t=263600
(72) Battery catches fire during charging - http://www.rcgroups.com/forums/showp...21&postcount=1
(73) Helicopter burns - http://www.rcgroups.com/forums/showthread.php?t=266337
(74) 3s Pack ignites during charge - http://www.rcgroups.com/forums/showthread.php?t=266875
(75) House fire reported in Belgium - http://www.rcgroups.com/forums/showp...1&postcount=24 CHECK OUT
(76) Plane burns during charge - http://www.rcgroups.com/forums/showp...5&postcount=47
(77) Puffed pack ignites during charging - http://www.rcgroups.com/forums/showt...64#post2560964
(78) 2s pack connected in parallel to 3s pack ignites - http://www.rcgroups.com/forums/showthread.php?t=274028
(79) Ballooned Pack Burns when punchured - http://www.rcgroups.com/forums/showthread.php?t=274557
(80) 7s pack catches fire during flight - http://www.rcgroups.com/forums/showthread.php?t=296507
(81) House fire – 3rd story burns - http://runryder.com/helicopter/t145397p1/
(82) Lipo catchs fire during charge on 109 charger. http://www.rcgroups.com/forums/showthread.php?t=307806
(83) 3s Lipo catches fire at correct settings. http://rcgroups.com/gallery/showphot...cat=500&page=1
(84) 2s pack starts house fire- reason unknown - http://www.rcgroups.com/forums/showthread.php?t=311323
(85) Pack catches fire after a short short - http://www.rcgroups.com/forums/showt...13#post3044752
(86) Charging slightly swelled pack causes fire - http://www.rcgroups.com/forums/showp...77&postcount=4
(87) Nicked cell catches fire - http://www.rcuniverse.com/forum/LiPo...tm.htm#2366986
(88) Li Ion cells ignite from charging mistake -
http://www.rcuniverse.com/forum/LiPo...tm.htm#2427714
(89) Battery ejected from crashed plane burns - http://www.rcgroups.com/forums/showthread.php?t=289255
(90) Battery involved in crash ignites several weeks later -
http://www.rcgroups.com/forums/showthread.php?t=273490
(91) Charging abuse causes fire - http://www.rcgroups.com/forums/showp...35&postcount=7
(92) Pack fire during F3A contest - http://www.rcgroups.com/forums/showp...8&postcount=11
(93) Slightly puffed cell catches fire during charging. http:// http://www.rcgroups.com/forums/showp...d.php?t=268523
(94) Lipo burns during attempt to restore overdischarged cell with CC/CV PS - http://www.rcgroups.com/forums/showthread.php?t=323693
(95) http://www.rcgroups.com/forums/showp...4&postcount=15
(96) New pack partially burns sitting on desk - http://www.rcgroups.com/forums/showthread.php?t=329744
(97) Pack ignites with no known cause - http://www.rcgroups.com/forums/showp...3&postcount=31
(98) Pack ignites during charging – equipment in shed corrodes - http://www.rcgroups.com/forums/showp...&postcount=177 and http://www.rcgroups.com/forums/showp...&postcount=187
(99) Lipo burns garage - http://www.rcgroups.com/forums/showp...6&postcount=14
(100) Lipo burns like rocket in a can during charging - http://www.rcgroups.com/forums/showthread.php?t=356474
(101) Cell ignites while soldering- http://www.rcgroups.com/forums/showthread.php?t=357380
(102) Screw penetrates pack igniting it - http://www.rcgroups.com/forums/showthread.php?t=360222
(103) Attempt to recharge “dead pack” causes plane fire - http://www.rcgroups.com/forums/showp...37&postcount=9
(104) Charged 3s (?) ignites while recharging with Astro 109 - http://www.rcgroups.com/forums/showthread.php?t=362011
(105) Packs in truck catch fire, burn truck – unexplained - http://www.rcgroups.com/forums/showthread.php?t=368758
(106) Battery charging inside of helicopter catches fire in garage. No cause determined. http://www.runryder.com/helicopter/t177482p1/
(107) Well used Lipo ignites during charging under correct conditions - http://www.rcgroups.com/forums/showthread.php?t=373643
(108) Lipo charged as NiCd burns when the ballooned pouch is punchured - http://www.rcgroups.com/forums/showt...10#post3794339
(109) Charging 2s1500 with possible wrong cell count ignites in safe - http://www.rcgroups.com/forums/showt...20#post3829205
(110) Packs used in parallel catch fire in flight - http://www.rcgroups.com/forums/showthread.php?t=378566
(111) Helicopter crashes – 20 minutes later, lipos burn - http://www.rcgroups.com/forums/showthread.php?t=384490
(112) 2 packs at wrong charger settings burn - http://www.rcgroups.com/forums/showthread.php?t=384585
(113) Charger unplugged, on restart it went into different mode – lipo burns- http://www.rcgroups.com/forums/showp...45&postcount=1
(114) Battery charged in SUV burns vehicle - http://www.wattflyer.com/forums/show...09&postcount=1
(115) Battery ignites after charging in modelers hand http://www.rcgroups.com/forums/showp...83&postcount=1
(116) Nicked pack “explodes in hand” http://www.rcgroups.com/forums/showp...&postcount=155
(117) Charging slightly puffed lipo causes it to ignite in plane. http://www.rcgroups.com/forums/showthread.php?t=434713
(118) Using NiCd setting causes LiPo to burn in garage - http://www.rcgroups.com/forums/showthread.php?t=435043


Last edited by hoppy; 10-30-2005 at 04:06 PM.
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Old 10-06-2005, 06:08 AM
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Well, some of these are easy to draw conclusions from of course. I guess the bottom line is treat lipolys with respect and understand that many things in life entail some risk.

Last edited by Tweet; 10-06-2005 at 08:11 PM.
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Old 10-06-2005, 01:17 PM
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I have never had an incident with lipols..........(knock on wood), but I think the most important thing is to not become COMPLACENT!!! Check you settings twice and once more for the heck of it and MONITOR the charge progress. Just my $.02

BTW: Thanks Hoppy for keeping such extensive and organized records and welcome to wattflyer.!!!

Doug
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Old 10-06-2005, 05:35 PM
  #6  
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Knowing human nature to not own up to one's mistakes and/or simply be blind to one's own complacency, you could probably move most of the "Unknown" and "Undetermined" cases over into the "Pack Damaged" or "Pack Shorted" categories. I'm sure a few would also qualify for a new category, "Defective from Manufacturer." But of course, that would assume you could read minds and travel through time and space at will to witness the failures and the events leading up to said failures...
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Old 10-06-2005, 06:11 PM
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Originally Posted by Unbalanced prop
I have never had an incident with lipols..........(knock on wood), but I think the most important thing is to not become COMPLACENT!!! Check you settings twice and once more for the heck of it and MONITOR the charge progress. Just my $.02

BTW: Thanks Hoppy for keeping such extensive and organized records and welcome to wattflyer.!!!

Doug
I've been using Li-Pos since they first became available from Thunder Power & KOKAM. I am extra careful when selecting the pack to be charged from the charger's memory bank as it is the area where mistakes are easily made.

Never had a problem with any of my Li-Pos, though I saw a Twinstar go up in flames when the idiot flying it was using a single, older version T/P 2100mAh pack driving two speed 400 type motors spinnig Gunther carbon fiber props. They were drawing in excess of 18 amps and he knew full well the battery in use was designed for a maximum discharge rate of 12.6 amps. It was a spectacular sight, though. When Li-Pos get abused they'll let you know in no uncertain terms.

I agree with you 100%, before anyone hits the 'charge' button make sure the charger is set up correctly for the specific pack being charged. Failure to do so will invariably result in disaster, especially with Lithium packs.

I also have made it a practice to charge my Li-Pos at a rate of 70% of 1C. Another important fact some people ignore for the sake of saving a few bucks is the use of not so reliable, "CHEAP" Li-Po chargers. I don't trust any charger under $100 regardless of what type of battery I plan on charging or who the maker of the charger happens to be.

With Li-Po chargers, you get what you pay for. With Li-Po batteries, if not careful with them you'll surely get burned.
 
Old 10-06-2005, 06:33 PM
  #8  
hoppy
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Originally Posted by Unbalanced prop
I have never had an incident with lipols..........(knock on wood), but I think the most important thing is to not become COMPLACENT!!! Check you settings twice and once more for the heck of it and MONITOR the charge progress. Just my $.02

BTW: Thanks Hoppy for keeping such extensive and organized records and welcome to wattflyer.!!!

Doug
Thanks Doug,
I know you have a strong regard for lipo safety from your posts on RCG.

The listing does show that the Vendor warnings are not just legalese but do need to be addressed. Those Vendor warnings by the way, most likely resulted from the efforts of many of us to bring the dangers of lipo cells to the forefront over the past few years. As you know, when lipos first came out they were advertised as being very safe.

The list is meant to be a tool to identify problem areas and hopefully prevent similar incidents from happening by educating users on how and why incidents have occurred. Hopefully we can all learn from other peoples experiences.

Last edited by hoppy; 10-06-2005 at 09:08 PM.
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Old 10-06-2005, 08:14 PM
  #9  
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Originally Posted by GeraldRosebery
So what exactly is your point here? I think that with all the information on vendors' websites we all know that LiPo's can, under some circumstances, be a hazard. Is your goal just to frighten people or do you have another point that is useful?
I think the data itself is useful. Everyone can draw their own conclusions. This just emphasizes that there are real consequences to inattention, as is true in most areas of flying.
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Old 10-07-2005, 12:38 AM
  #10  
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Originally Posted by Tweet
I think the data itself is useful. Everyone can draw their own conclusions. This just emphasizes that there are real consequences to inattention, as is true in most areas of flying.
So well put. This past Monday, an experienced 'gas' flyer broke two fingers and the thumb of his right hand when the plane he was working on lurched forward and he 'tried' to stop it with his gloved hand. The monster plane had a 28X10 wooden propeller on its nose.

Six hours at the hospital and 76 stitches later, he knows he won't be flying the rest of the year because of lack of attention to securing the model properly. And idiot? Nope, the man borders on the brilliant. Absent minded while messing with that model? Absolutely yes!

My Point? Disastrous consequences will follow when Li-Po packs are improperly charged and or mishandled. Lithium batteries should be handled with the respect they deserve.

Last edited by qban_flyer; 10-07-2005 at 07:47 AM. Reason: Text correction
 
Old 10-12-2005, 08:56 PM
  #11  
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Hey, you got my attention! I really appreciated seeing the list!!

For someone who is new to using Lipos, what are the essential do's and not to do's...

From the list it doesn't look like there are too many to discuss.

* Obviously, charging on the wrong cell count is a major not to do!

(From now on I'll be certain that the cell count is correct)

* Check out the Lipo after a crash to see if it is damaged, an important to do!

(What is considered damage, to the point it shouldn't be used anymore?)

What about storage?

I've been using small nylon bags to keep them from shorting out and carrying them in a soft hand bag in the car.

(Sounds like an accident waiting to burn)

What should I be doing?

Overused Lipos?

(I was given an old Lipo by a friend. When is it considered too old?)

Other dangers?

(The other day I noticed sharp screws sticking up from the floor of the plane under the Lipo and cut them off).

Wanting to be safer...

Heidelberg Germany Flyer
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Old 10-12-2005, 09:43 PM
  #12  
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What about storage?
1/2 charge and cool if over a couple of weeks of non-use expected.

Overused Lipos?
I've seen where they say when capacity drops to 80% of what it was to begin with, it's time to retire them....your measured mah, not the claimed.

Other dangers?
Don't charge a puffed or damaged cell.


* Check out the Lipo after a crash to see if it is damaged, an important to do!
Hard to say how much is too much damage. When it smells sweet, it's a goner. When it puffs it's a goner. Any pouch tears - goner.


Other things-
Keep packs balanced - check them every so often.
Do not discharge below 3V/cell under load.



I charge, store, and transport my lipo's in a metal box away from flammable materials if possible so that if an ignition occurs, it is limited to the lipo.
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Old 10-12-2005, 09:50 PM
  #13  
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One of my associates shot himself in the leg while practicing quick draw.
As many people want to do they want to ban guns.. Some people get very serious injuries riding their bikes on the highway. some people get killed riding their motocycles on the highway and offroad. We play our games and we take our chances.
Why do we always want to blame the other for our mistakes. Oh, the one who shot himself in the leg was practicing quick draw for cowboy action shooting, single action revolver, cut away holster, had the trigger pulled before he cleared the holster, a nono, improper equipment. Couldn't have happened if he had the right holster. He broke one of the rules and paid.

Read and follow the instructions, someone went to a lot of trouble to keep us out of trouble.
Oh, yes, three years and I finaly wired a deans backwards. Let the smoke out of the little black box.
New 3s1500 and Phoenix 25.
By george
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Old 10-13-2005, 12:24 AM
  #14  
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Hey, you got my attention! I really appreciated seeing the list!!

For someone who is new to using Lipos, what are the essential do's and not to do's...

From the list it doesn't look like there are too many to discuss.

* Obviously, charging on the wrong cell count is a major not to do!
(From now on I'll be certain that the cell count is correct)
This applies to all types of batteries regardless of make.

* Check out the Lipo after a crash to see if it is damaged, an important to do!
(What is considered damage, to the point it shouldn't be used anymore?)
I have seen KOKAMs 'accordioned' (squished badly) after a really bad crash. We observed them for 35 minutes while they were sitting on concrete with a bucket of sand nearby. Nothing happened, though the pack was disposed off properly afterwards.


What about storage?
I've been using small nylon bags to keep them from shorting out and carrying them in a soft hand bag in the car.
(Sounds like an accident waiting to burn)
It's not a good idea to carry them around in bags of any type. They should be carried inside solid containers. I don't mean concrete bunkers, but hard pastic tool boxes should do just fine.

What should I be doing?

Overused Lipos?
(I was given an old Lipo by a friend. When is it considered too old?)
They haven't been aroung long enough to have seen any 'overused' ones. I have seen many 'abused' ones, though. According to the experts they should last for about 400 - 500 charge and discharge cycles. That's quite a long time. I suppose when they begin to achieve/retain less than a full charge (70% and under) it is about time to consider replacing them (this applies to all types, not just Li-Pos).

Other dangers?
(The other day I noticed sharp screws sticking up from the floor of the plane under the Lipo and cut them off).
Good practice as Li-Pos won't tolerate puncturing. It's considered abuse and it can lead to an explosion and or a fire.

Wanting to be safer...

Heidelberg Germany Flyer

Take care and happy flying
 
Old 10-13-2005, 07:10 PM
  #15  
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Thanks for the advice...

Did you really mean for me to use hard plastic tool box and not a metal one?

Last night I pulled out my warnings from the lipo batteries and carefully read them. I can't believe that it clearly states that when you are finished charging you are to disconnect from the car battery connection before you disconnect the Lipo battery. Of course I've been pulling out lipo connection first and then disconnecting from the car battery afterwards. (I think it is because of my computer training)

I'm sure that your experienced flyers know this, but this is another careless habit that I developed as a new flyer! There is no excuse for doing anything wrong while charging as most of the fires and explosions on the list were because of human mistakes.

Heidelberg Germany Flyer
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Old 10-18-2005, 06:10 AM
  #16  
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Originally Posted by Heidelberg Germany Flyer View Post
Thanks for the advice...

Did you really mean for me to use hard plastic tool box and not a metal one?
Plastic ones won't cause them to ignite if the connectors come in contact with the container. A metal one, being conductive will exacerbate the risk of a short and or a fire.

Last night I pulled out my warnings from the lipo batteries and carefully read them. I can't believe that it clearly states that when you are finished charging you are to disconnect from the car battery connection before you disconnect the Lipo battery. Of course I've been pulling out lipo connection first and then disconnecting from the car battery afterwards. (I think it is because of my computer training)

I'm sure that your experienced flyers know this, but this is another careless habit that I developed as a new flyer! There is no excuse for doing anything wrong while charging as most of the fires and explosions on the list were because of human mistakes.

Heidelberg Germany Flyer
I disconnect mine the same way you have been disconnecting yours. So far no problems encountered. I have yet to read that type of warning on a Li-Po pack or any site related to batteries.

I tend to think that people make Li-Po packs appear to be more dangerous than they really are. I guess manufacturers and re-sellers do so as a disclaimer in order to free themselves from a possible lawsuit.

Treating Li-Pos with the same respect as we do other types will suffice. They are like a car, a knife or a can opener. Properly handled they are harmless and useful implements. If you are careless with them something is bound to happen sooner or later.
 
Old 10-18-2005, 06:38 AM
  #17  
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Originally Posted by nova801428 View Post
Geoff Gino,
I totally agree, pEOPls cAn be Stuupids SOmtiims. I mean it's right there usually either in the package or on the lipo itself. What do people think now days.
Nova
OK - How's this for STUPID.
Flew this week end and was having a great time at a fairly busy club. Was in hurry to get back up in the air and disconnected a battery that was on charge and plugged in the next one and noticed smoke from one of them.

Was in such a hurry that without looking had plugged the 2 batteries together instead of the discharged one into the charger and my haste has cost me LiPo that was now completly dangerous and has to be discarded.

Old saying "less haste, less waste"

We all make mistakes but need to be "man" enough to admit to be wrong sometimes and not always blame the equipment.

Geoff
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Old 10-18-2005, 06:51 AM
  #18  
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Originally Posted by Geoff_Gino View Post
OK - How's this for STUPID.
Flew this week end and was having a great time at a fairly busy club. Was in hurry to get back up in the air and disconnected a battery that was on charge and plugged in the next one and noticed smoke from one of them.

Was in such a hurry that without looking had plugged the 2 batteries together instead of the discharged one into the charger and my haste has cost me LiPo that was now completly dangerous and has to be discarded.

Old saying "less haste, less waste"

We all make mistakes but need to be "man" enough to admit to be wrong sometimes and not always blame the equipment.

Geoff
Worse thing that I have done was to charge a Li-Po battery after disconnecting the previously charged one. You may think, what's wrong with that?

The one I removed from the charger was a 2 cell 1320, the one I proceeded to charge was a 2 cell 900! I was lucky to have found out my mistake five minutes into the charge, so nothing disastrous happened that time.

You are correct. At times we are in such a hurry we forget what we are supposed to be doing and that's when bad things happen.
 
Old 10-18-2005, 01:44 PM
  #19  
Unbalanced prop
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Originally Posted by Geoff_Gino View Post
Was in such a hurry that without looking had plugged the 2 batteries together instead of the discharged one into the charger and my haste has cost me LiPo that was now completly dangerous and has to be discarded.
This is exactly why I switched to Deans ultras on all my smaller packs. It is impossible to plug two batteries together using female ultras on the batteries.

Doug
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Old 10-18-2005, 03:13 PM
  #20  
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Hi Doug

Funny that it always is a matter of pride. We all at some stage think we can't do wrong.

You have hit the nail on the head, let's say that I put those packs together in my STUPID days.

I have however learnt from my mistakes and I am currently changing all my connectors.

Geoff
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Old 10-18-2005, 03:23 PM
  #21  
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Hi Geoff

I know that I make mistakes!:o In fact the older I get the more I make. That is the reason I do things like make it impossible to connect to batteries together because if it can be done wrong, I CAN do it wrong. I try and make things as much of a no brainer as possible because my brain isn't always fully engaged.

Doug
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Old 10-18-2005, 04:21 PM
  #22  
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Was in such a hurry that without looking had plugged the 2 batteries together instead of the discharged one into the charger and my haste has cost me LiPo that was now completly dangerous and has to be discarded.
I am rather confused by your statement, the one quoted above.

Please, forgive me for sounding stupid but I have a question that has been bugging the daylights out of me. How can anyone hook up two batteries to the same charger using a single charging cable with a single connector on its battery end?

My charging cables (all of them, since I've been in e-flight) will only accept one (1) battery pack exclusively, not two or three, so it is difficult for me to picture what is it that you are talking about. How you managed to plug two battery packs into one single connector is hard to fathom for this old brain.
 
Old 10-18-2005, 05:05 PM
  #23  
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qban flyer, Thanks for the tip with the plastic container to store the Lipos!

Check www.purehobby.com/SafetyNotes.htm for the disconnection advice, it's printed in red...

Keep safety first!


Heidelberg Germany Flyer
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Old 10-18-2005, 05:16 PM
  #24  
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Was the danger because you were charging at 13 amps instead of 9 amps, as the voltage was still the same (2 cells) and it would cut off at the correct voltage wouldn't it?
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Old 10-18-2005, 08:01 PM
  #25  
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I have been using Li-Polys for over 2 years now, and like the first post indicates, the only problems I have had - I have caused. The only fire was when I didn't watch them and had set for over the 1C charge rate after charging a larger MAH pack. I have caught them a couple of time in the shop where I did the same thing, and they turned to sausages, Immediately unplugged them and doused in salt water. This was early on, and since being VERY careful, have had no problem.

They have revolutionized Electric RC, and it looks like they will be around for awhile. I have some packs that are over 2 years old, and still work great after who knows how many flights.

The first thing I did when going to them, was buy an Astro FLight Li-Po charger. I think that this is why I've had so few problems. It wasn't cheap, but does let me know if I am charging correctly. Plus I charge at about 80% of 1C, and also about every month or so run them down using the Discharge function of the Astro Charger.

Second I bought a fireproof box to carry them in. And I keep it in the front seat while driving to and especially from the field. Even if they go into flame, at least I have a handle to grab and throw them somewhere where they might do minimal damage. So far that hasn't happened and hopefully with continued caution, wont happen.

I also only use Anderson powerpoles on all my batteries, They are very good for this use as they protect from ever getting a short, without sticking something in the opening on purpose. Using deans plugs, with the open male ends, I shortd out a pack accidentally on the bench when a metal jewelers screwdriver rolled against them. Didnt burst into flames, but threw the pack away anyway.


There was the same big concern when the Jet guys began using propane on the big Jet powered turbines. There was talk of banning them, special licensing etc. And now they are common place, but the guys operating them have become very safety concious. With Li-Polys we have to do the same.

What would be interesting would be seeing the dateline graph for all the incidents shown. I would wager that as time went on it would show a decline in problems as people got used to them. Nicads can burst into flames also folk.
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