Weekdayskier
Well-known member
Hi,
I did a 200 mile drive today. While charging with JDemo, I noticed a bad smell that made me gag and choke. It turns out that my Bosch AGM 12V battery was probably overheated, venting in the way a tea kettle vents. I managed to get home with the AC on recirc, since the battery continued to vent while driving.
Once home, voltage was 13.2 on the battery, 14.25 with the car in ready. I let the battery cool and stop venting. Afterwards, the car wouldn't start. I pulled the battery and brought it to Pep Boys. The battery test revealed 13.14 volts, 1 CCA. They did replace the battery under warranty. The manager feels the reason for failure is from a problem in the car.
I installed the battery this evening. Without attaching the ground, there is 11.8V from the chassis to the negative terminal. I don't think this is normal, but don't have much experience. Could this be a short in the 12V system? Or is the vehicle charging system not designed for an AGM battery?
Of note, the traction motor and onboard charger were replaced 2 weeks ago. There are no error messages, the car drives normally. No other electric gremlins.
Thanks in advance for the help.
I did a 200 mile drive today. While charging with JDemo, I noticed a bad smell that made me gag and choke. It turns out that my Bosch AGM 12V battery was probably overheated, venting in the way a tea kettle vents. I managed to get home with the AC on recirc, since the battery continued to vent while driving.
Once home, voltage was 13.2 on the battery, 14.25 with the car in ready. I let the battery cool and stop venting. Afterwards, the car wouldn't start. I pulled the battery and brought it to Pep Boys. The battery test revealed 13.14 volts, 1 CCA. They did replace the battery under warranty. The manager feels the reason for failure is from a problem in the car.
I installed the battery this evening. Without attaching the ground, there is 11.8V from the chassis to the negative terminal. I don't think this is normal, but don't have much experience. Could this be a short in the 12V system? Or is the vehicle charging system not designed for an AGM battery?
Of note, the traction motor and onboard charger were replaced 2 weeks ago. There are no error messages, the car drives normally. No other electric gremlins.
Thanks in advance for the help.