...

Layout

Batter Rebuild

New BMS

Max Housing Size - 100mmx65mm

Current BMS

Bluetooth BMS

aliexpress.com - C$23.63

Image AddedImage Added

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

+ Bluetooth MCU scheme, and some parameters can be flexibly adjusted through
the uppercomputer according to the needs of customers.

The Smart BMS Automatically Identify Lithium Battery Strings From 10S To 17S.
Size:102*65*12mm.
Applicable Battery Type: 3.2v Lifepo4 & 3.7v Li-ion Battery Pack.
Package Included:BMS with built-in BT*Balance Wires

Function Introduction
(1)BT-APP in Phone-xiaoxiangElectric App:http://www.jiabaida.com/appdown/index.html
Support Both IOS version and Android version, can monitor and change the parameters.
(2)PC Tool Software: https://jbdtools.oss-cn-beijing.aliyuncs.com/packfile/JBDTools.zip
(3)UART LCD Displayer-Can monitor parameters on LCD display.

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

Image Added

Bluetooth BMS

Image AddedImage Added

Capacity Test

...

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.

Image Added

References