Polymer Battery Packs
Please confirm the information below before signing in. Already have an account? The BMS usually trips in that scenario for one of two reasons: 1) The load pulled by the controller is too high for that BMS, or 2) one or more cells are weak or damaged and when the load is applied strongly, it causes the voltage of that parallel group to drop below the LVC of the BMS.
When we add the fourth parallel group, we’ll again hot glue it in place in the opposite orientation of the third parallel group (and the same orientation of the energy storage companies second parallel group) and then weld it on the opposite side as we welded between the second and third group (and the same side as we welded between the first and second group).
I have the exact same BMS but i only have 6 cells, 2p x s3 , i have 2x 3.7v @ 2000 mah batteries in parallel connected to another 2 parallel batteries in series and another parallel pack in series if that makes sense to make a total of 11.1 v @ 12mah for a small project.
The first level of protection relies on circuitry monitoring the battery’s voltage and state of charge (see fig 1). The system designer will set thresholds for over-discharging, over-charging and over-current (short circuit) conditions: if any threshold is exceeded, the controller shuts the battery down.
Although battery cells and packs typically feature active and passive safety devices and protection circuitry to prevent or mitigate potential cell failures, the last resort is typically a mechanical safety vent that is intended to release the internal pressure of the cell or pack when a specified pressure is reached.