Radinn batteries

The housing is made of two parts:

• Shiny plastic top layer, onto which the rubber mat is glued
• White plastic tub

The battery is secured into the board by three metal twisting thingies, and they seem to go through both the plastic top part and the tub. In the bottom, it is a 28mm socket that would attach.

• There are no screws under the foam.
• It is these three plugs plus glue that holds this together.
• Taking off the screws around the charge connector does not help. It is also glued in.

Opening

I cut with an angle grinder carefully around the top of the white tub.

The battery is built INTO the white tub, and the black top lifts off.

Parts

Main relay

HFE80V-200

200-12-HTC5Y

200A 200VDC

Xiamen Hongfa Electric Power Controls Co., Ltd.

Is is used for both charge and discharge.

Fuse

ASTM

EV3030-50-DB

200 Vdc 350A

Relay for soft start resistor

HFE80V-20

450-12-HTQ2J

20A 450VDC

Xiamen Hongfa Electric Power Controls Co., Ltd.

Soft start resistor

RX24 100W40RJ

Current sense shunt

BMS

RLB-14MS-ERC-BQA v7.1

Connectors

• Current sense
• Soft start relay control
• Main relay control
• 4-wire I2C to the bluetooth module?
  • GND, SCL, SDA, V+
• 4 NTCs, 2 wires each, two on positive side, two on negative side of the pack
• 15 pin sense
• Power supply for BMS
• Data connectors to the main connector
  • Wakeup+
  • SW-
  • SW+
  • Relay ctrl
  • Wakeup-
  • Cont relay
  • Vcc
  • GND
  • SCL
  • SDA
  • CAN+
  • CAN-

Cells

Samsung INR18650-30Q

14S23P arrangement -> 322 cells!

Assembly

• They use Chinese spacers, very familiar.
• They also do manual inspection of welds, also very familiar!
• It is not clear how the busbars are attached - they are welded on to the nickels?
• They use 14AWG silicone wires to distribute the load. Smart spacing. I love it, nice job. (Of course really nice would be to screw to the busbar.. but that would require custom busbars!)

Failure analysis - S/N 01F2010004E3

• Fuse OK
• Cells are balanced  at 4.11/cell
• If I bypass the contactor w/ the multimeter in current measuring, the charger will charge!
• There is corrosion on the BMS!

Failure analysis - S/N 01F201000586

• Fuse OK
• Imbalance: B14 is 3.227V, while the rest is 4.14V
• Water damage on BMS at multiple spots

Possible repairs

• The housings are not reusable. Any repair means using and sealing a new housing.
• BMS and relays and fuse are easy to swap
• If the cells are bad, repairs is not going to be economical