Nissan-LEAF-Battery-Upgrade

So you are looking to upgrade the battery in your LEAF? You've come to the right place for information and software/hardware required. Take some time to familiarize with the content.

Read this first

Start by reading all the terminology and info about what a battery upgrade, direct upgrade, paring, CAN-bridges etc. is by following this link to the wiki: https://github.com/dalathegreat/Nissan-LEAF-Battery-Upgrade/wiki

Getting the hardware

The BatteryUpgrade software runs on both the Muxsan 3-port CAN-bridge, and on the 2-port Budget CAN-bridge. This guide focuses on the 2-port since it is the easiest to source at the moment. Here are some purchase links for both

Note, for 2-port it has to be the BLUE PCB, the other varients are not supported.

Software needed to flash

Hardware needed to flash

Flashing instructions

3-port

See this video: https://youtu.be/eLcNSo2Vn6U?t=167

2-port

See this video: https://www.youtube.com/watch?v=LssrvVYLtp8

Flash with BridgeFlasher.exe located in software folder. The compiled .srec files are . For ST LINK CLI, point the exe towards the "ST-LINK_CLI.exe" located in the "STM32 ST-LINK Utility" folder that appears after installing it. Incase the BridgeFlasher.exe doesn't run, make sure you have installed vc++ 2015 x86

This is what the BridgeFlasher.exe should look like. Press Start to flash.

Connect the ST Link V2 to the J1 ports on the PCB. It can be hard to connect dupont wires here, so I recommend getting needle pins. Pay close attention to the pin labels on the ST Link flasher, they can vary location depending on type.

7 3.3V - J1

Nothing - J2

3 GND - J3

2 SWDIO - J4

6 SWCLK - J5

Wiring in the hardware

When installing the 2-port into the vehicle, here are the wiring instructions:

• Red wire #1 -> +12V constant (fuse with 3A)
• Red wire #2 -> +12V constant (fuse with 3A, join together with other red wire)
• Purple -> EV-CAN Low, Green wire (battery side)
• Green -> EV-CAN High, Blue wire (battery side)
• Yellow -> EV-CAN Low, Green wire (vehicle side)
• Blue -> EV-CAN High, Blue wire (vehicle side)
• Black -> Ground
• Black -> Ground

Here is an example on a 2012 LEAF:

Software needed to make changes to code

Incase you want to make changes and actually recompile the code, you will need the following IDE

• Keil uVision5

e-nv200 notes

The 2-port CAN-bridge can also be used on the env200. It just needs to be flashed with a different software. See this repository for the .srec file: https://github.com/dalathegreat/Nissan-env200-Battery-Upgrade/blob/main/leaf-can-bridge-3-port-env200/Debug/canbridge.srec

Dependencies 📖

This code was made possible with the help of Muxsan and their excellent 3-port hardware. Also massive thanks to my Patreon Glen for introducing me to the 2-port alternative.

Alternative hardware/software

There is an excellent ESP32 alternative available here: https://github.com/NismoBoy34/Esp32LeafInverterBridge

Like this project? 💖

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