Controller repair
Here are the components that we have seen go bad, and the probable cause of failure.
Our PN |
Description |
Label |
Manuf |
Manuf P/N |
Vendor |
Vendor P/N |
Cause of failure |
EUD0515DD |
5 TO +/- 15 V - DC-DC CONVERTER DIP - Module |
MOD1 |
CUI |
Digikey |
Miswired load current sensor |
||
EXT0024NL |
IRLL024N 55V, 65mOhm N-MOSFET Transistor |
Q1-7 |
International Rectifier |
Digikey |
Pin 9 not connected to pin 1 |
||
EXD0030TB |
SMAJ30A 33Vbrk, 400W UNIDIR TVS SMA Diode |
D4-11 |
Littelfuse |
Digikey |
Apply > 33 V to an Open Drain output |
||
EXD1002HP |
STTH1002CB - 2 x 8A 60V 2L CK DPACK - Diode |
DN1 |
STMicroelectronics |
Digikey |
Short from V+ to ground |
||
EXL4051HD |
74HC4051 8-1 Analog Mux IC, logic |
U4-5 |
STMicroelectronics |
Digikey |
Battery pack shorted to chassis + high voltage applied to comm. harness going to BMS controller |
||
EXI2551RD |
MCP2551 CAN BUFFER IC, I'face |
U2 |
Microchip |
Digikey |
High voltage applied to CAN bus |
Additionally, we have seen these easily repairable problems:
- Fused traces, between a connector pin and the ground plane, especially at pin 1 of the white control connector, or at pins 2, 3, or 4 of one of the 16 bank connectors
Additionally, we have seen these non-repairable problems:
- The entire BMS controller blown by 12 V applied to the 5 V supply
- The entire BMS controller blown by high voltage applied to one of the 16 bank connectors
- High voltage applied to the BMS controller through the bank connectors; and then, when the BMS controller is connected to a computer, attempting to ground the BMS controller, completing the circuit and blowing the entire area of the RS232 buffer