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Sugestion for Li-Ion 6S BMS 20A for Automotive li-ion CATL 13.Ah

Urgi

New Member
Joined
Jul 9, 2022
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18
Hi guys

Just start experimenting wit Li-Ion battery at my 24V system and looking for BSM for 6S Li-Ion

Anyone some sugestion please.

Until now I used 2x12V 90Ah AGM old 5/7 years and performance is crapy

Today I had for free 42V 13.8Ah VAG battery 1 year old 5WA915107

It was 12S 2P CATL 6.9Ah and I mods today for 2 x 24V banks and now I using them without BMS as test run

Than today all open and mod done Cutt cross-busbar and here I have to 2 x 24V 6S2P + connected both banks parrarelly

Ideally will be 7S2P but this is fine for testing ;)

MPPT set to max V cut to 24.6V = 1 cell max 4.1V for now without BMS

Did small experiment with grid tie inverter 45V and nicely 1000W 35A

Tommorow will try charge to max 24.6V if Sun ? be there HaHa forecast rain and ⛅

Than if you know any good BMS 20A for li-ion please advise THX


Some pictures
 
Last edited:
Just update done read out ECU 5WA915107 and here is log



interesting - more info in VCDS LOG



28709 - HV Battery Pack

P0A7D 00 [038] - State of Charge Low

[BMS_SOC_LL1]

Intermittent - Not Confirmed - Tested Since Memory Clear

Freeze Frame:

Fault Status: 00000001

Fault Priority: 6

Fault Frequency: 1

Reset counter: 40

Mileage: 0 km

Date: 2000.00.00

Time: 00:00:00



Unlearning counter according OBD: 255

High_voltage_battery_total_voltage: 42.80 V

Test_Program_High_voltage_battery_contactor_voltage: 0.00 V

High_Voltage_Battery_Pack_Current_1: -0.03 A

Battery temperature: 22 °C

State of charge: 21 %

Test_Program_Cell_voltage: 3.57 V

Test_Program_Cell_index: 6

Test_Program_Cell_voltage: 3.53 V

Test_Program_Cell_index: 9

Test_Program_Outlet_temperature: 22 °C

Test_Program_Inlet_temperature: 21 °C

Test_Program_Cell_state_of_charge: 0 %

Test_Program_Cell_index: 0

Test_Program_Cell_state_of_charge: 0 %

Test_Program_Cell_index: 0

Maximum_permanent_discharge_power: 2500 W

Minimum_permanent_discharge_voltage: 42.00 V

Maximum_permanent_charge_power: 2600 W

Minimum_permanent_discharge_voltage: 43.00 V

Maximum_strategic_discharge_power: 11300 W

Minimum_strategic_discharge_voltage: 39.00 V

Maximum_strategic_charge_power: 13850 W

Minimum_strategic_charge_voltage: 46.00 V

Maximum_peak_discharge_power: 13450 W

Minimum_peak_discharge_voltage: 38.00 V

Maximum_peak_charge_power: 16350 W

Minimum_peak_charge_voltage: 46.00 V

Maximum_voltage: 50.00 V

Minimum_voltage: 36.00 V

Maximum_discharge_current: 380 A

Maximum_charge_current: 380 A
 

Attachments

  • Log-5WA915107.txt
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Just Q anyone use this BSM 6S 40A li-ion?
 

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