The Lithium Smart battery range require an external BMS and low/high voltage/temperature protection. We are looking at connecting 4 x 200Ah batteries in parallel. However if you use 1 x smallBMS and daisy chain the leads, then if 1 battery in the bank has a fault, the BMS will shut down the batteryProtect and no power will be available.
Is it possible to add a smallBMS and some BatteryProtect/Cyrix devices to each battery to create what is similar to a superpack. The pack would have a separate charging and load connector.
Note: Superpack batteries will not fit in our enclosure.
The following image is taken from the battery protect manual.
If we assume the following:
- "Battery Charger" is a RED keyed Anderson for charging input
- "DC Load" is a GREY Anderson connector for load outputs
Would it be possible to connect 4 of these in parallel. Or would the main 220A Battery protect have to be changed to a Cyrix module as there may be reverse current connecting the batteries in parallel.
The BatteryProtect manuals state: Caution: uncontrolled reverse current will flow through a Battery Protect if Vout > Vin. Therefore never use a Battery Protect for battery to battery charging.
This way, if one of the packs fails and the BMS switches one off, then the other three would still be able to function.