New JK BMS Hardware Model JK-B2A8S20P-H Erroneous Readings

See original GitHub issue

I was able to successfully poll this new hardware with the JK02 protocol. Model: JK-B2A8S20P-H Hardware: 11.XW Software: 11.12 Some of the readings don’t match the JIKONG BMS app. See resistance_cell04 through 8, capacity_remain, and cycle_count?

`Command: getCellData - BLE Cell Data inquiry

Parameter Value Unit

header 55aaeb90

record_type 02

record_counter 47

voltage_cell01 3.186 V

voltage_cell02 3.185 V

voltage_cell03 3.186 V

voltage_cell04 3.185 V

voltage_cell05 3.185 V

voltage_cell06 3.186 V

voltage_cell07 3.185 V

voltage_cell08 3.186 V

voltage_cell09 0.0 V

voltage_cell10 0.0 V

voltage_cell11 0.0 V

voltage_cell12 0.0 V

voltage_cell13 0.0 V

voltage_cell14 0.0 V

voltage_cell15 0.0 V

voltage_cell16 0.0 V

voltage_cell17 0.0 V

voltage_cell18 0.0 V

voltage_cell19 0.0 V

voltage_cell20 0.0 V

voltage_cell21 0.0 V

voltage_cell22 0.0 V

voltage_cell23 0.0 V

voltage_cell24 0.0 V

average_cell_voltage 0.0 V

delta_cell_voltage 0.0 V

current_balancer 0.0

resistance_cell01 0.0 Ohm

resistance_cell02 0.0 Ohm

resistance_cell03 0.0 Ohm

resistance_cell04 0.255 Ohm

resistance_cell05 0.0 Ohm

resistance_cell06 3.186 Ohm

resistance_cell07 0.002 Ohm

resistance_cell08 0.007 Ohm

resistance_cell09 0.049 Ohm

resistance_cell10 0.049 Ohm

resistance_cell11 0.049 Ohm

resistance_cell12 0.049 Ohm

resistance_cell13 0.049 Ohm

resistance_cell14 0.049 Ohm

resistance_cell15 0.049 Ohm

resistance_cell16 0.048 Ohm

resistance_cell17 0.0 Ohm

resistance_cell18 0.0 Ohm

resistance_cell19 0.0 Ohm

resistance_cell20 0.0 Ohm

resistance_cell21 0.0 Ohm

resistance_cell22 0.0 Ohm

resistance_cell23 0.0 Ohm

resistance_cell24 0.0 Ohm

battery_voltage 0.0 V

battery_power 0 W

balance_current 0.0 A

battery_t1 0.0 °C

battery_t2 0.0 °C

mos_temp 0.0 °C

percent_remain 0 %

capacity_remain 17694.72 Ah

nominal_capacity 0.0 Ah

cycle_count 25485

cycle_capacity 14.883 Ah

time 157D0H22M41S

current_charge 25.6

current_discharge 0.0 `

Debug attached. BMS_Debug.txt

Issue Analytics

State:
Created a year ago
Comments:9 (5 by maintainers)

Top GitHub Comments

2reactions

stcancommented, Nov 8, 2022

Thank you for the hint with the 32 cells… I added 8 cells in protocols/jk02.py and the read values fit perfectly !!!

Thanks a lot!

```

[“LittleHex2Short:r/1000”, 2, “Voltage_Cell15”, “V”], [“LittleHex2Short:r/1000”, 2, “Voltage_Cell16”, “V”], [“LittleHex2Short:r/1000”, 2, “Voltage_Cell17”, “V”], [“LittleHex2Short:r/1000”, 2, “Voltage_Cell18”, “V”], [“LittleHex2Short:r/1000”, 2, “Voltage_Cell19”, “V”], [“LittleHex2Short:r/1000”, 2, “Voltage_Cell20”, “V”], [“LittleHex2Short:r/1000”, 2, “Voltage_Cell21”, “V”], [“LittleHex2Short:r/1000”, 2, “Voltage_Cell22”, “V”], [“LittleHex2Short:r/1000”, 2, “Voltage_Cell23”, “V”], [“LittleHex2Short:r/1000”, 2, “Voltage_Cell24”, “V”], [“LittleHex2Short:r/1000”, 2, “Voltage_Cell25”, “V”], [“LittleHex2Short:r/1000”, 2, “Voltage_Cell26”, “V”], [“LittleHex2Short:r/1000”, 2, “Voltage_Cell27”, “V”], [“LittleHex2Short:r/1000”, 2, “Voltage_Cell28”, “V”], [“LittleHex2Short:r/1000”, 2, “Voltage_Cell29”, “V”], [“LittleHex2Short:r/1000”, 2, “Voltage_Cell30”, “V”], [“LittleHex2Short:r/1000”, 2, “Voltage_Cell31”, “V”], [“LittleHex2Short:r/1000”, 2, “Voltage_Cell32”, “V”], [“discard”, 4, “discard1”, “”], [“LittleHex2Short:r/1000”, 2, “Average_Cell_Voltage”, “V”], [“LittleHex2Short:r/1000”, 2, “Delta_Cell_Voltage”, “V”], [“LittleHex2Short:r/1000”, 2, “Current_Balancer”, “”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell01”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell02”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell03”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell04”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell05”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell06”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell07”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell08”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell09”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell10”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell11”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell12”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell13”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell14”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell15”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell16”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell17”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell18”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell19”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell20”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell21”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell22”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell23”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell24”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell25”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell26”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell27”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell28”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell29”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell30”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell31”, “Ohm”], [“LittleHex2Short:r/1000”, 2, “Resistance_Cell32”, “Ohm”],



jkbms -p c8:47:8c:e5:be:34 -b 115200 -P JK02 -c getCellData
Command: getCellData - BLE Cell Data inquiry
------------------------------------------------------------
Parameter                       Value           Unit
header                          55aaeb90
record_type                     02
record_counter                  136
voltage_cell01                  3.21            V
voltage_cell02                  3.212           V
voltage_cell03                  3.21            V
voltage_cell04                  3.209           V
voltage_cell05                  3.21            V
voltage_cell06                  3.21            V
voltage_cell07                  3.21            V
voltage_cell08                  3.209           V
voltage_cell09                  0.0             V
voltage_cell10                  0.0             V
voltage_cell11                  0.0             V
voltage_cell12                  0.0             V
voltage_cell13                  0.0             V
voltage_cell14                  0.0             V
voltage_cell15                  0.0             V
voltage_cell16                  0.0             V
voltage_cell17                  0.0             V
voltage_cell18                  0.0             V
voltage_cell19                  0.0             V
voltage_cell20                  0.0             V
voltage_cell21                  0.0             V
voltage_cell22                  0.0             V
voltage_cell23                  0.0             V
voltage_cell24                  0.0             V
voltage_cell25                  0.0             V
voltage_cell26                  0.0             V
voltage_cell27                  0.0             V
voltage_cell28                  0.0             V
voltage_cell29                  0.0             V
voltage_cell30                  0.0             V
voltage_cell31                  0.0             V
voltage_cell32                  0.0             V
average_cell_voltage            3.21            V
delta_cell_voltage              0.004           V
current_balancer                0.773
resistance_cell01               0.048           Ohm
resistance_cell02               0.049           Ohm
resistance_cell03               0.046           Ohm
resistance_cell04               0.045           Ohm
resistance_cell05               0.046           Ohm
resistance_cell06               0.048           Ohm
resistance_cell07               0.048           Ohm
resistance_cell08               0.049           Ohm
resistance_cell09               0.0             Ohm
resistance_cell10               0.0             Ohm
resistance_cell11               0.0             Ohm
resistance_cell12               0.0             Ohm
resistance_cell13               0.0             Ohm
resistance_cell14               0.0             Ohm
resistance_cell15               0.0             Ohm
resistance_cell16               0.0             Ohm
resistance_cell17               0.0             Ohm
resistance_cell18               0.0             Ohm
resistance_cell19               0.0             Ohm
resistance_cell20               0.0             Ohm
resistance_cell21               0.0             Ohm
resistance_cell22               0.0             Ohm
resistance_cell23               0.0             Ohm
resistance_cell24               0.0             Ohm
resistance_cell25               0.0             Ohm
resistance_cell26               0.0             Ohm
resistance_cell27               0.0             Ohm
resistance_cell28               0.0             Ohm
resistance_cell29               0.0             Ohm
resistance_cell30               0.0             Ohm
resistance_cell31               0.0             Ohm
resistance_cell32               0.0             Ohm
battery_voltage                 25.68           V
battery_power                   0               W
balance_current                 0.0             A
battery_t1                      11.9            °C
battery_t2                      11.7            °C
mos_temp                        0.0             °C
percent_remain                  65              %
capacity_remain                 151.165         Ah
nominal_capacity                230.0           Ah
cycle_count                     0
cycle_capacity                  178.097         Ah
time                            37D1H43M35S
current_charge                  0.003
current_discharge               0.0

0reactions

stcancommented, Nov 9, 2022

I have not changed anything except adding 8 cells in the voltage and resistance section. This cron job has run 24h so far without any problems: ***** /usr/local/bin/jkbms -p c8:47:8c:e5:be:34 -b 115200 -P JK02 -c getCellData -o mqtt -q 192.168.0.55 > /dev/null 2>&1

The edited file: jk02.zip