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Max Housing Size - 100mmx65mm

Current BMS

Bluetooth BMS

aliexpress.com - C$23.63

JBD Smart BMS-SP17S005 is a software protection board scheme specially designed
for 10～17series lithium battery packs.The whole system adopts concave convex front-end
acquisition chip

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Attention
(1)All smart bms support xiaoxiangElectric App IOS and Android version to convert li-ion and lifepo4 parameters.
(2)All smart bms has BT and UART function.
(3)Smart BMS accessories needs buy separately:https://www.aliexpress.com/item/3256804529002284.html
(4)All UART communication can be converted to Canbus communication if needed,
only need to buy a canbus module converter separately.
(5)APP Manual and BMS Specification:pls contact customer service.

Circuit

Initial Replacement BMS

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Bluetooth BMS

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Capacity Test

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Power Turns Off When Driving - A lot

The battery would turn off when pulling higher currents. If I was easy on the throttle, I could get it to stay on.

Testing the cells showed that they were within spec. 

I decided to disassemble the battery and test every cell. They appear to be fine. Capacity tests results were good.

When disassembling the battery, I noticed a wire with exposed copper. I assumed I hit it with the razor blade when taking it apart but it may have pre-existed.

Ordered a new Smart BMS with Bluetooth which might help diagnose future issues. 

See Bluetooth BMS.

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References