Guru
Joined: 13/10/2014
Location: AustraliaPosts: 2232
| Posted: 04:08am 04 Jan 2024 |
Well, a few overnight cycles down to 50% SOC and back up to 3.45v per cell in the morning and all cells are now tracking within 15mv per Cell at charging currents holding between 37A to 50A. The Active balancer came on couple of times for around 10 to 20 seconds this morning and that's all. Looking good.
I actually have enough Cells left to make a third 170AH 48V battery. That will be interesting as it will have four new cells combined with twelve three year old cells.
The four new cells are from a 12v battery that I was given as a replacement for the faulty battery I returned out of another 4 x 12v battery bank.
BTW: The following may or may not be of interest to anyone but here it is:
The BMS Hardware codes and BMS SW version.
BMS hardware version number:
The hardware chip scheme used in the BMS has thirteen characters. The First three digits = BMS.
BMS-ST103-309E
The middle is MCU:
MCU Abbreviation MCU Full Name
ST103 STM32F103RBT6
ST030 STM32F030C8T6
GD230 GD32E230C8T6
Last four digits are AFE:
AFE Abbreviation AFE Full Name
309E SH367309
303E SH367303
DVCE MT DVC
9818 9818
The device running in AFE operation mode in my BMS-ST103-309E is an SH367309:
The SH367309 is an analog front-end IC for lithium battery BMS. It is suitable for lithium battery packs with a total voltage of no higher than 70V.
In AFE mode the SH367309 can be used with the MCU to manage the lithium battery pack, supports all protection. The SH367309 has Integrated VADC for cell voltage measurements, temperature measurements and current measurement; Integrated CADC for current measurement, used to count the remaining capacity; Integrated EEPROM, used to save adjustable parameters such as protection threshold and delay; Integrated TWI communication.
BMS Software Version:
Total of thirteen characters, the first two digits represent the chip solution, the middle represents the release date, the last four digits are reserved, and the default represents the project code.
11_231110_001T
1st digit:
1: STM32F103
2: STM32F030
3: GD32E230
2nd digit of the item number:
1: 309
2: 303
3: 9818
4: DVC
FYI the SH367309 has:
A 13-bit VADC for Cell Voltage, Temperature and Current Measurements. Measurement Frequency: 10Hz
- 16 Channels for Cell Voltage Measurements
- 1 Channel for Current Measurement
- 3 Channels For Temperature Measurements
1 CADC for Current Measurement, 16 bit Σ-Δ analog-to-digital measurement, 4Hz measurement frequency, 1 channel differential input.
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Edited 2024-01-04 14:50 by KeepIS