Niko-La / KISS-BMS - History

v0.3.3: Final version for BMS challenge with EnAccess

Updates compared to v0.3.2:

- Optimization of some copper planes
- Net tie with thicker connection to GND
- D12 connected to Bat-

No parts were changed, the BOM is same as before.

v3.2.2: Switch to SMD terminals instead of press-fit

Rationale: These are easier to manufacture (no additional step required)
and the PCB can be mounted onto a heat sink without any milling required.

Remove FUSE_DETECT circuit

Q13 was not properly tied to ground, so it was not switching on the
voltage divider. A voltage divider that is continuously on would
draw current even in deepsleep mode, so it is not viable for a BMS.

I could not come up with an easy circuit that allows monitoring the
voltage without any power consumption, so the fuse diagnosis
mechanism is removed for now.

Board v0.3.1: Add test point for GPIO9 (BOOT) pin

Fixes #34

Major update for BMS C1 v0.3

This commit contains major updates of the PCB after the first prototype
build-up and testing. Changes include:

- Single PCB instead of stacked PCBs to simplify design and reduce cost.
- STM32 MCU was removed due to supply shortage. Only ESP32-C3 supported.
- Custom connectors replaced with off-the-shelf Würth Power Elements.
- 5V power rail removed to simplify design (CAN runs on 3V3 transceiver).
- Larger Shunt with improved footprint.
- Optimized layout to reduce distance between IC and shunt.

Updates based on review comments (v0.2)

This is the design revision that was ordered for the first prototype build.

The pinout of the cell connector and the board-to-board connector changed
compared to v0.1, hence it got a minor revision update.

The control board is now a 4-layer board to improve the grounding of the
PCB. Various other suggested improvements from the design review are also
included in this update.

Fixes #11, #12, #13, #17, #18, #19