ChaDeMo diagnostics

So far I wasn’t able to fast charge my test pack. First I thought it had to do with fact that the JLD505 wiring was somewhat different than the schematic in the ChaDeMo Kit Manual because it has been used in a Zero motorcycle. The logging showed that the High voltage contactor was closed and that the EVSE supplied a high voltage. But after a few seconds the voltage rose to the max battery voltage set in the JLD505 and the EVSE stopped the charging process. Based on the ChaDeMo charging sequence flowchart I came to the conclusion that the JLD505 is working fine. But the test pack is probably causing problems. The test pack has old batteries from an UPS and they weren’t designed for fast charging.

The JLD505

The JLD505 module consists of a single two-layer printed circuit board mounted in a
Modice Cinch LE weatherproof enclosure.
This module is compatible with the Arduino Uno multicrontroller board and uses the
Arduino Integrated Development Environment for programming.
The heart of the module is an ATMEGA328P-AU 16 MHz multicontroller. The highperformance Atmel picoPower 8-bit AVR RISC-based microcontroller combines 32KB ISP flash memory with read-while-write capabilities, 1024B EEPROM, 2KB SRAM, 23 general purpose I/O lines, 32 general purpose working registers, three flexible timer/counters with compare modes, internal and external interrupts, serial
programmable USART, a byte-oriented 2-wire serial interface, SPI serial port, a 6-
channel 10-bit A/D converter (8-channels in TQFP and QFN/MLF packages),
programmable watchdog timer with internal oscillator, and five software selectable power saving modes. The device operates between 1.8-5.5 volts.
By executing powerful instructions in a single clock cycle, the device achieves

JLD505 manual

The EVTV CHAdeMO Fast Charge Kit includes the following components:
• 1 CHAdeMO Fast Charge Inlet and wiring harness.
• 1 JLD505 Charge Controller
• 1 Cinch Connector and Pin Set
• 2 Gigavac High Voltage Contactor Relays
• 1 12v Relay
• 1 DS18B20 Temperature Sensor Probe
• 1 400A 50mv 0.1% calibrated shunt
• 1 USB Connection Cable

ChaDeMo testing at FastNed fail

Only 10 Km from where I am there is an ChaDeMo charge station owned by FastNed. With the battery pack loaded into the Land Rover I headed to the charging station.

Battery pack in the back of the Land Rover

The first test gave some result but no charging took place. After 4 seconds the charging stopped.

First ChaDeMo charge session failed