Lucast85
Member level 3
Hi everyone,
in these days I've looked for the Tesla Model 3 BMS and, like some other PCBs, I see the board has some dot/circle of copper on top layer.
![model-3-battery-pack-bms.jpg model-3-battery-pack-bms.jpg](https://www.edaboard.com/data/attachments/88/88050-bd00417d04cc36a0f71ecd215fb5bbd7.jpg)
What is the purpose of this solution? It was designed to distribuite the copper on outer layer of the board and avoid copper plating issues (over/under plating)? Why circles and why not copper areas?
Thanks![Wink ;) ;)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
in these days I've looked for the Tesla Model 3 BMS and, like some other PCBs, I see the board has some dot/circle of copper on top layer.
![model-3-battery-pack-bms.jpg model-3-battery-pack-bms.jpg](https://www.edaboard.com/data/attachments/88/88050-bd00417d04cc36a0f71ecd215fb5bbd7.jpg)
What is the purpose of this solution? It was designed to distribuite the copper on outer layer of the board and avoid copper plating issues (over/under plating)? Why circles and why not copper areas?
Thanks