One precaution: Dooley, if you have so-called "racing" lithium batteries to replace 12v lead-acid batteries, they are *NOT* suitable for use in series to power an EV. Two reasons:
1. Their amphour capacity is much lower than the lead-acid battery being replaced. That means a lot less range in an EV. The manufacturers do this to make it lighter (for racing), and so they can use fewer smaller (cheaper) cells. The 12v battery in a normal car is only used to start the ICE. This only need high "cranking" amps -- not amphour capacity. Even very small lithium cells can have high cranking amps, but with much lower amphour capacity. 2. These battery have (or should have) an internal BMS (Battery Management System). The BMS will disconnect the battery to prevent it from being overcharged or run dead to prevent fires. This disconnect is only built to interrupt 12v. If you put these batteries in series and one of these disconnects opens, it will see the ENTIRE series pack voltage, and so is likely to fail and cause a fire! -- Excellence does not require perfection. -- Henry James But it *does* require attention to detail! -- Lee Hart -- Lee A. Hart https://www.sunrise-ev.com _______________________________________________ Address messages to [email protected] No other addresses in TO and CC fields HELP: http://www.evdl.org/help/
