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Louisvdw / dbus-serialbattery

Battery Monitor driver for serial battery in VenusOS GX systems
MIT License
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SOC Reset with 3 Battery Banks #1032

Closed rolandlueders closed 2 months ago

rolandlueders commented 2 months ago

Describe the bug

I don´t use the SOC Reset feature but i want to use it to balance from time to time. So I set the Cell_OVP to 3,55V and the CellOVPR to 3,45V , Balance_Trigger_Voltage to 0,005V and Start_Balance to 3,47V in the JK BMSes. The Voltage rises to more then MAX_CELL_VOLTAGE and when reaching 3,47V balancing beginns. When one cellvoltage rises to more of SOC_RESET_VOLTAGE the Charge Voltage will lowered. So thins Battery will balanced perfectly. But when the criteria of SOC_Reset are reeached, the Charge Voltage is too low for the other Batteries: The Cage_Current is low and the PV-Voltage is more than MPP Voltage. Next Day in Parameters are different Charge modes displayed. It would be better, when the end of the SOC_Reset Mode is only reached if all connected Batteries are well balanced. One Battery image And another Battery: image

How to reproduce

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Expected behavior

All three Batteries should reach SOC_RESET_VOLTAGE in the same day if enough PV power ist available.

Driver version

1.2.20240408

Venus OS device type

Raspberry Pi 4

Venus OS version

v330-18

BMS type

JKBMS / Heltec BMS

Cell count

8

Battery count

3

Connection type

Serial USB adapter to RS485

Config file

MAX_BATTERY_CHARGE_CURRENT =150.0
 MAX_BATTERY_DISCHARGE_CURRENT =180.0
MAX_CELL_VOLTAGE   = 3.45
SOC_RESET_VOLTAGE = 3.50
SOC_RESET_AFTER_DAYS = 1
SOC_LEVEL_TO_RESET_VOLTAGE_LIMIT = 97
; Charge current control management enable (True/False).
CCCM_SOC_ENABLE = false
; Discharge current control management enable (True/False).
DCCM_SOC_ENABLE = false
CELL_VOLTAGES_WHILE_CHARGING   = 3.55, 3.50, 3.45, 3.30
MAX_CHARGE_CURRENT_CV_FRACTION =    0, 0.1,  0.3,    1
BMS_TYPE = Jkbms

Relevant log output

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Any other information that may be helpful

No response

mr-manuel commented 2 months ago

This is not an issue of this driver and was asked many times. You have to use a battery aggregator. https://github.com/Dr-Gigavolt/dbus-aggregate-batteries is the only one that I know of, where this should behave like you want.