The board uses BM3451XXDC-T28A to protect 3/4/5 cells rechargeable battery pack. the IC works constantly to monitor each cell’s voltage, the current of charge or discharge, and the temperature of the environment to provide overcharge, over-discharge, discharge overcurrent, short circuit, charge overcurrent, and over-temperature protections, etc. Besides, it also can change the protection delay time of overcharge, over-discharge, and discharge overcurrent by setting the external capacitors.
- Power tools
- Electric bicycle
- UPS applications
- etc.
The board's power supply voltage range is 5-30V, charge or discharge current MAX is 30A.
The four MOSFET Q8, Q9, Q10, Q11 and tow jepsun current resistor RSENSE1 and RSENSE2 can be replaced to achieve higher current output.
Select the number of cells based on whether RSET1 and RSET2 are mounted with 0Ω resistors.
When RSET1 and RSET2 all not mounting with 0Ω resistors leads to the SET pin in a floating state, and the board can connect 5 cells.
When RSET1 is mounting with resistors, RSET2 is not mounting with resistors, and short circuits B1 and B-, the board can connect 4 cells.
When RSET1 is not mounting with resistors, and RSET2 is mounting with resistors, and short circuits B2, B1, and B-, the board can connect 3 cells.
[Warning]: Not RSET1 and RSET2 all to mounting with 0Ω resistors, this behavior will cause a short circuit
There are five LEDs to monitor the balancing status of the cells. When one of the LEDs is lit, it means that the corresponding cell is starting to balance.
LED1, LED2, LED3, LED4, and LED5 correspond to B1, B2, B3, B4, and B5 respectively:
At the same time, the DO and CO pins correspond to DO_LED1 and CO_LED1 respectively. This allows you to check the discharge and charge status.
Safe and reliable by providing control discharge overcurrent release terminals with optical coupler.
Control of OCCT pin is via XH P2.5mm 3pin terminal.
[Warning]: The OCCT pin has not been tested. Usage instructions are not provided in the datasheet. Usage instructions will be provided after board testing.
The board connection diagram is shown in the image.
- The board is manufactured.
- The board is testing.
- Know how
OCCTworks. - The donation channel is open.
Every contribution to this repository is highly appreciated! If you spot any bug or problem, open a issue or pull request so that it can be rectified for everyone.
For feature requests: Please open a issue and I'll add the feature in a future release once I get some time in my hands.
The donation channel is not currently open, so stay tuned.
For e-enthusiasts or geeks, follow the CC-BY-NC-SA 4.0 license. For contributors and donors you can follow the CC-BY 4.0 license, which means that commercial use is supported and distributed freely.