3 ms·
Hey Jason, good question. It turns out to be a non-issue. Lead-acid batteries have terrible lifetimes at high temperatures, so cars are already designed with en
by conjecTech 11y ago
Hey Jason, good question. It turns out to be a non-issue. Lead-acid batteries have terrible lifetimes at high temperatures, so cars are already designed with enough distance between the engine and battery and enough circulation to ensure the battery is never more than a few degrees above ambient. The batteries in our design also aren't generally active while the engine is running. Let me know if that addresses your concerns.
- jhayward 11y agoVery late on this, sorry. I'm curious to see if you expect to get 7 years life on a LiFePO4 in hot states. I just measured the battery temp (at the terminal) on my truck, it was 163 ºF. Road surface temp is 155 ºF. This is quite common, everyday summer stuff here in Texas. It seems very unlikely that you can hold a LiFePO4 at 100% state of charge in a temperature environment like this and still get anywhere near 7 years of life. Are you doing something like using a 20 A-H battery, charged to 70% SOC or something, to deal with high-heat/high SOC degradation?