Sosaley is redesigning its BMS Master Controller to be used as an Automotive Battery Management System (autoBMS). The proposed configuration of autoBMS will have the following major features:
- Easy plug-in and plug-out into the battery terminal block of the e-vehicle.
- Can handle cell blocks that are detachable.
- Communicate through the CAN bus.
- Have a touch screen for displaying data. The screen size could be 4 to 7 inches in size.
- Monitor and manage each cell individually. There could be a limitation on the maximum number of cells. This can be specified later.
- Manage up to 150Ah of current and roughly 200 volts.
The autoBMS will be in the form of a plug and play device. A terminal block will be fixed permanently on the vehicle. The terminal block will be hardwired to each battery cell. The autoBMS block can be simply plugged into the terminal block. It will get both data and power from the terminal block.
Internally, the autoBMS will multiplex the analogue signals, do an ADC conversion and read the data that is coming from each cell. In addition, it will read the status of all the cells through a separate connection in the terminal block.
When we look at a BMS for the EV industry, we are looking far beyond the BMS that uses lead-acid batteries. The following functionalities are considered essential:
- Protect the cells from damage
- Prolong the life of the cells
- Ensure that the cells meet certain minimal functional requirements
- Interact with vehicle management
- Predict emergency situations so that they can be avoided