Re: Pugeot E-208, Corsa E, etc. battery pack.
Posted: Sat Feb 08, 2025 9:59 am
Digging through the electronics modules from the battery, I found the precharge circuit. I found it interesting because it uses PTC thermistors.
The PTC's are C1412by TDK rated for 620V and 120ohm. The relay is V23700-C0001-A408 made by TE Connectivity 450V and 20A.
The PTC's are arranged in 2S7P making it a 34.3 ohm precharge resistor.
If there is a short on the HV when precharging the PTC's will dissipate 4700W @400V 11.7A. This will heat up the PTC's real quick, and that will lower the current. A normal resistor will not survive for long in this situation.
The PTC's are arranged in 2S7P making it a 34.3 ohm precharge resistor.
If there is a short on the HV when precharging the PTC's will dissipate 4700W @400V 11.7A. This will heat up the PTC's real quick, and that will lower the current. A normal resistor will not survive for long in this situation.