Are lithium-ion batteries in EVs a fire hazard?

Reuters2021-08-24

Aug 23 (Reuters) - General Motors Co has expanded the recall of its Chevrolet Bolt electric vehicles due to a risk of fire from the pouch-type lithium-ion battery cells made by South Korea's LG. The ...

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breAkdaWn
·2021-08-25
Remember the iPhone battery catching fire? Phones were not allowed to be carried in airlines. I have seen power banks swell n get out of shape. How much more damage can ev batteries do!!
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breAkdaWn
·2021-08-25
Don't forget iPhone had battery catching fire and the airlines stopped these phones being carried. How much more damage can these ev batteries !
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Limth
·2021-08-24
Doesn't sound good
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- Rickyt089:
  Yeah but it has been commonly used
  2021-08-24
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The electrolyte carries the lithium ions between electrodes. The separator keeps the positive electrode from coming in contact with the negative electrode.\nEnergy, in the form of electricity, is discharged from the battery cell when lithium ions flow from the negative electrode, or anode, to the positive electrode, or cathode. When the cell is charging, those ions flow in the opposite direction, from cathode to anode.\nWHY DO LI-ION BATTERIES POSE A FIRE RISK?\nLithium-ion batteries, whether they are used in cars or electronic devices, can catch fire if they have been improperly manufactured or damaged, or if the software that operates the battery is not designed correctly.\nThe major weakness of lithium-ion batteries in electric cars is the use of organic liquid electrolytes, which are volatile and flammable when operating at high temperatures. An external force such as a crash can also lead to chemical leakage.\n\"For EV fires, it's been always very difficult to pinpoint the exact root cause of the fire, because it is extremely difficult to 're-enact' the fire incident with the same conditions,\" said Kim Pil-soo, automotive engineering professor at Daelim University.\nAlso authorities, car makers and battery makers often do not disclose what the exact safety risk is.\nWHAT CAUSED THE FIRES ON BOLTS AND KONAS?\nIn February, South Korea's transport ministry said some defects had been found in some battery cells manufactured at the LGES China factory and used in Hyundai Motor's electric cars, including the Kona EV. Hyundai's recall cost about 1 trillion won ($854 million).\nGM said the batteries supplied by LG for the Bolt EV and Bolt EUV may have two manufacturing defects – a torn anode tab and folded separator – present in the same battery cell, which increases the risk of fire.\nFor a factbox on major battery fires:\nARE POUCH-TYPE BATTERIES MORE VULNERABLE?\nAll three types of lithium-ion batteries currently used in electric cars - cylindrical, prismatic and pouch-type - are fundamentally the same in functionality, but each has pros and cons.\nCylindrical and prismatic batteries are cased in hard materials. Pouch-types use sealed flexible foils and are protected by thin metal bags.\nThe technology used in cylindrical batteries is old and yields consistent results. These cells can withstand high internal pressure without deforming. They are also cheaper, making them ideal for mass production. But they are heavier and their shape stops cells from being packed as densely as with other battery forms. Tesla Inc mostly uses cylindrical batteries, some supplied by LGES.\nPrismatic batteries are considered safer and lighter than cylindrical cells and, because they are rectangular, can be more densely packed. They optimize space better than cylindrical cells, but are typically more expensive and have a shorter life cycle. They can also swell.\nCompared with cylindrical and prismatic cells, pouch-type battery cells allow for lighter and thinner cell fabrication, and design flexibility for different capacities and space requirements for different vehicle models. However, they are vulnerable to swelling, and are more vulnerable in crashes, posing a greater fire risk.\nGM and Hyundai Motor use pouch battery cells from LG Energy Solution (formerly LG Chem). Volkswagen said earlier this year it would shift away from pouch-style cells made by LG and SK Innovation Co Ltd to prismatic technology.\nARE THERE OTHER SOLUTIONS?\nCompanies such as China's BYD Co produce EV battery cells that use lithium iron phosphate cathodes, which are less prone to catching fire, but are not able to store as much energy as standard cells that use nickel cobalt manganese cathodes.\nOthers including GM are testing different chemistries such as nickel-cobalt-manganese-aluminum (NCMA) technology, which use less cobalt, making the cells more stable and cheaper.\nChinese battery maker CATL unveiled last month a sodium-ion battery that does not contain lithium, cobalt or nickel.\nA number of companies including Toyota Motor Corp are also developing battery cells with solid-state electrolytes, which could minimize overheating issues and fire risks, but could take another three to five years to commercialize.","kind":null,"is_publish_news":true,"is_publish_highlight":false,"is_publish_live":false,"is_publish_wemedia":null,"editions":null,"column":"","sentiment":"0","news_tag":"","news_rank":0,"symbols":[],"gpt_button":1},"commentList":[{"id":834444595,"gmtCreate":1629823294217,"gmtModify":1676530143407,"author":{"id":"3569809505691000","authorId":"3569809505691000","name":"breAkdaWn","avatar":"https://community-static.tradeup.com/news/4c3676c14de9bfcd6f45bcf7ba4ddb6c","vip":1,"crmLevel":1,"crmLevelSwitch":0,"idStr":"3569809505691000","authorIdStr":"3569809505691000"},"htmlText":"Remember the iPhone battery catching fire? Phones were not allowed to be carried in airlines. I have seen power banks swell n get out of shape. How much more damage can ev batteries do!!","listText":"Remember the iPhone battery catching fire? Phones were not allowed to be carried in airlines. I have seen power banks swell n get out of shape. How much more damage can ev batteries do!!","text":"Remember the iPhone battery catching fire? Phones were not allowed to be carried in airlines. I have seen power banks swell n get out of shape. How much more damage can ev batteries do!!","images":[],"top":1,"highlighted":1,"essential":1,"paper":1,"likeSize":1,"commentSize":0,"repostSize":0,"link":"https://ttm.financial/post/834444595","repostId":2161705167,"repostType":2,"isVote":1,"likeStatus":false,"favoriteStatus":false,"reportStatus":false,"tweetType":1,"langContent":"EN"},{"id":834442091,"gmtCreate":1629822944613,"gmtModify":1676530143353,"author":{"id":"3569809505691000","authorId":"3569809505691000","name":"breAkdaWn","avatar":"https://community-static.tradeup.com/news/4c3676c14de9bfcd6f45bcf7ba4ddb6c","vip":1,"crmLevel":1,"crmLevelSwitch":0,"idStr":"3569809505691000","authorIdStr":"3569809505691000"},"htmlText":"Don't forget iPhone had battery catching fire and the airlines stopped these phones being carried. How much more damage can these ev batteries !","listText":"Don't forget iPhone had battery catching fire and the airlines stopped these phones being carried. How much more damage can these ev batteries !","text":"Don't forget iPhone had battery catching fire and the airlines stopped these phones being carried. How much more damage can these ev batteries !","images":[],"top":1,"highlighted":1,"essential":1,"paper":1,"likeSize":1,"commentSize":0,"repostSize":0,"link":"https://ttm.financial/post/834442091","repostId":2161705167,"repostType":2,"isVote":1,"likeStatus":false,"favoriteStatus":false,"reportStatus":false,"tweetType":1,"langContent":"EN"},{"id":834035716,"gmtCreate":1629761671435,"gmtModify":1676530120704,"author":{"id":"3565147372726492","authorId":"3565147372726492","name":"Limth","avatar":"https://static.tigerbbs.com/a3e8250fe16c4e0e90561c3755568eae","vip":1,"hat":"https://static.tigerbbs.com/a3dee1aa3a3a3c1814833a4d3f8a5669","crmLevel":6,"crmLevelSwitch":0,"idStr":"3565147372726492","authorIdStr":"3565147372726492"},"htmlText":"Doesn't sound good","listText":"Doesn't sound good","text":"Doesn't sound good","images":[],"top":1,"highlighted":1,"essential":1,"paper":1,"likeSize":0,"commentSize":1,"repostSize":0,"link":"https://ttm.financial/post/834035716","repostId":2161705167,"repostType":4,"isVote":1,"likeStatus":false,"favoriteStatus":false,"reportStatus":false,"tweetType":1,"comments":[{"id":5626469,"gmtCreate":1629762479493,"gmtModify":1663232814430,"authorId":3571612770300673,"author":{"id":3571612770300673,"idStr":"3571612770300673","authorId":3571612770300673,"name":"Rickyt089","avatar":"https://static.tigerbbs.com/4e75fb09fa53aa8d7db329d6599d40c1","vip":1,"currentWearingBadge":{"badgeId":"972123088c9646f7b6091ae0662215be-3","templateUuid":"972123088c9646f7b6091ae0662215be","name":"Legendary Trader","description":"Total number of securities or futures transactions reached 300","bigImgUrl":"https://static.tigerbbs.com/656db16598a0b8f21429e10d6c1cb033","smallImgUrl":"https://static.tigerbbs.com/03f10910d4dd9234f9b5702a3342193a","grayImgUrl":"https://static.tigerbbs.com/0c767e35268feb729d50d3fa9a386c5a","redirectLinkEnabled":0,"hasAllocated":1,"isWearing":1,"stampPosition":0,"hasStamp":0,"allocationCount":1,"allocatedDate":"2024.01.06","exceedPercentage":"93.26%","individualDisplayEnabled":0,"individualDisplaySort":0,"categoryType":1100},"crmLevel":6,"crmLevelSwitch":1,"individualDisplayBadges":[]},"repliedAuthorId":0,"objectId":834035716,"type":1,"supId":0,"prevId":0,"content":"Yeah but it has been commonly used","text":"Yeah but it has been commonly used","html":"Yeah but it has been commonly used"}],"langContent":"EN"}],"hasMoreComments":true,"newsSizeData":{"likeSize":36,"commentSize":3,"repostSize":0,"favoriteSize":1,"likeStatus":false,"favoriteStatus":false}}