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.
by Martin Jäger 2 years 5 months
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.
by Martin Jäger 2 years 6 months
Move mounting holes and improve routing
by Martin Jäger 2 years 6 months
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.
by Martin Jäger 2 years 6 months
Add ESP32-C3 and switch part numbers
by Martin Jäger 2 years 6 months
Board v0.3.1: Add test point for GPIO9 (BOOT) pin Fixes #34
by Martin Jäger 2 years 7 months
BOM updates with a few more alternative parts
by Martin Jäger 2 years 7 months
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.
by Martin Jäger 2 years 8 months
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
by Martin Jäger 3 years 2 months
v0.1 design ready for review
by Martin Jäger 3 years 2 months
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