Battery reset

When resetting, a distinction must be made between 'battery reset' and resetting the 'SoH' (State of Health) and 'charge cycle counter'.

A battery reset may be necessary if the battery goes into the safety position due to an unexpected, external fault in the electrical system (e.g. short circuit).

BQ batteries

With the newer batteries of the BQ-series with 48 V nominal voltage, there are two suppliers, HTE and Simplon. They differ in the number of screws on the charging base.

One of the differences in the inner workings of the HTE battery is the presence of a clearly visible CMOS backup battery.

If the battery goes into the safety position, the Stromer can no longer be driven. The battery must be taken to Stromer for a check where the safety mode can be reset (battery reset). The battery should then be ready for use again. It is advisable to check where the problem was in the electrical system of the Stromer and to rectify it beforehand.

As a caveat, I once read that a battery reset is also possible if the BMS is de-energized. Sequence: Balancer lines, positive line, then disconnect CMOS battery, then everything back in reverse order.

In contrast to the battery reset, a reset of the 'SoH' (State of Health) and 'charge cycle counter' is only possible with HTE batteries (battery base with 3 screws).

See also AKKU - 'Battery reset: SoH and charge cycle counter'

BO Batteries

With the BO-model series, the 36 V batteries for the older Stromer models, there is a jumper JP1 on the circuit board. If this is connected, a reset is performed.

With the BO series, it is not necessary to reset the 'SoH' and 'charge cycle counter' after a cell renewal.