BMS charge limit on Zombie using Orion

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Rustybkts
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BMS charge limit on Zombie using Orion

Post by Rustybkts »

When using the Leaf PDM in charge mode with a Zombi controller, the charger is limited to 2A (0,7kW)as can be seen on Spot values for BMS_ChargeLim

Looking at the SimpBMS CAN messages, I cannot see where the BMS limit is being sent.

Is a CAN message missing?

Also concerned that the SOC is always 100% on Spot Values which is not correct. Is this used at all as I guess the BMS_Vmin and BMS_Vmax are used during charging.

Have attached a pic of the Spot Values and SimpBMS messages on the Orion.
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tom91
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Re: BMS charge limit on Zombie using Orion

Post by tom91 »

Rustybkts wrote: Sat Jan 25, 2025 5:52 pm SOC is always 100% on Spot Values
Does not get taken, you can MAP it via the spotvalue interface to CAN. It does not get used by anything.

Please note the current implementation of Current limit assumes its 0.001A/unit. So modify the message accordingly. https://github.com/damienmaguire/Stm32-vcu/issues/77

Will get resolved to the correct scale soon.
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Rustybkts
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Re: BMS charge limit on Zombie using Orion

Post by Rustybkts »

Ok got it. I mistook the abbreviations in Orion messages and have the SimpBMS message list now so will sort.

Again thanks.
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Re: BMS charge limit on Zombie using Orion

Post by Rustybkts »

Charging sorted by modifying the current limit message but will only re-start after being unplugged with a Zombi power cycle.

Tried unplugging for a minute or so and switching ignition on and off but no change.

All displayed parameters correct and charging enabled but simply doesn't re-start but a power cycle to the Zombi module and it charges perfectly.
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Re: BMS charge limit on Zombie using Orion

Post by tom91 »

Rustybkts wrote: Sun Jan 26, 2025 2:45 pm only re-start after being unplugged with a Zombi power cycle.
Wrong topic. But as said before waking and sleeping of PDM and inverter this should fix this issue for you.

No one else mentioned this problem before and seemed to be fine in previous versions of firmware. So I suspect not wiring correctly.
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Re: BMS charge limit on Zombie using Orion

Post by Rustybkts »

My wiring is only different as I have a Type 2 socket instead of the Type 1 which has the switch in the plug to toggle the plug resistance.
The PDM and inverter wiring is too simple to wire incorrectly.
You mentioned on another thread that Damien doesn't have the 2.7k resistor in the socket so will try without it.
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