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Anton avatar image
Anton asked

Two batteries with JK BMS

Hello, I build two 22S5P Batteries of 40Ah LTO cells with own JK BMS each and would like to make the Venus OS on Raspberry to speak with both of them via https://github.com/Louisvdw/dbus-serialbattery driver. Please help me to set up the software. Thanks.

Venus OSBMSRaspberry Pi
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Louis van der Walt avatar image
Louis van der Walt answered ·

Hi, just follow the steps on the wiki section How to Install. The only difference would be that you also need to adjust the min/max cell voltages the match your LTO cells.

Just work through the steps and ask when you get stuck.

https://github.com/Louisvdw/dbus-serialbattery/wiki/How-to-install

https://github.com/Louisvdw/dbus-serialbattery/wiki/FAQ#does-the-driver-work-for-37v-based-cells-also

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Anton avatar image Anton commented ·
Hi and thank you. I know already how to change the hard limits. My question was about two JKs on one Raspberry. Are they going to be recognised automatically, or some modification of files is necessary? I cannot try it immediatelly, my HW is under construction. I ask in advance to avoid struggeling when the HW will be ready.
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Louis van der Walt avatar image Louis van der Walt Anton commented ·

You need to connect each with their own USB connector. You will see the details of each one, but the system will only use one.

Then once this ticket is done you will be able to merge them into one large battery.

https://github.com/Louisvdw/dbus-serialbattery/issues/8

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Anton avatar image Anton Louis van der Walt commented ·
I've just read the thread on Git hub. Thanks for your great work, Louis. Is the current version of the driver able to provide at least the sum of charge/discharge currents to the system? Or is the smart shunt necessary? Could you estimate the date when your upgrade will be available?
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Louis van der Walt avatar image Louis van der Walt Anton commented ·

The sum is not available. That is what that ticket is about. I expect the feature could be available in 1-2 months, but this does depend on my free time available.

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Anton avatar image Anton Louis van der Walt commented ·
Hi Louis, OK, please tell me when the upgrade is available. I need a couple of weeks to finish the hardware so it could be the right timing.
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Louis van der Walt avatar image Louis van der Walt Anton commented ·
I suggest you follow that issue in github to get the notifications. It's not possible for me to remember who to notify when new versions are available :)

On that ticket page is a subscribe button.

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