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Lithium batteries in the cold
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<blockquote data-quote="shizzzon" data-source="post: 8612784" data-attributes="member: 590338"><p>We are working on full on thermal management for lithium since nobody else seems to want to do it.</p><p></p><p>We have a full temp chart from the manufacturer of our cells which show performance degradation and immediate fail points based on temperature.</p><p></p><p>Quick tip- if the cell temp of a lithium cell drops below 32F and it is hit with a charge (even from alternator) greater than 0.02C.. expect permanent damage to a % of it's capacity for the rest of it's life.</p><p></p><p>Lithium starts to degrade around 60F and falling. Most wont notice in that range if they have an alternator tied to it. We are more worried about people's pack not getting damaged when the vehicle is on under frigid temps plus performance will get a massive boost in competition by managing the temps and keeping the cells warm, but not too warm.</p></blockquote><p></p>
[QUOTE="shizzzon, post: 8612784, member: 590338"] We are working on full on thermal management for lithium since nobody else seems to want to do it. We have a full temp chart from the manufacturer of our cells which show performance degradation and immediate fail points based on temperature. Quick tip- if the cell temp of a lithium cell drops below 32F and it is hit with a charge (even from alternator) greater than 0.02C.. expect permanent damage to a % of it's capacity for the rest of it's life. Lithium starts to degrade around 60F and falling. Most wont notice in that range if they have an alternator tied to it. We are more worried about people's pack not getting damaged when the vehicle is on under frigid temps plus performance will get a massive boost in competition by managing the temps and keeping the cells warm, but not too warm. [/QUOTE]
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