BOTTOM only cells from C3 to C6 (LiC7 LiC6 LiC5 LiC4)
LiIon cell organization
BOTTOM only cells from C3 to C6 (LiC7 LiC6 LiC5 LiC4) |
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LiIon cell organization
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01.06.2026 NEW LTC3300 board.
I've developed custom evaluation board ( to cells 3 to 6, and 2nd to cells 4 to 6.
In total, for a battery stack with seven LiIon cells).
The LTC3300-2 is on a separate module on a printed circuit board and can be removed
and replaced with another module designed for testing and measurement on the power section of the motherboard.
The module contains input RC elements for inputs I1P to I6P and I1S - I6S and some other components.
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The following figure shows an RC element at the input of (for example) I6P, where R has a value of 10 and the capacitor is defective or has a small value.
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01.06.2026 NEW LTC3300 board. Charge mode - Secondary MOSFET T302 is damaged at C6
measuring points on G6S and I6S input.
Picture 1 for damaged MOSFET T302. Picture 2 after replacing the damaged MOSFET T302 with new ones.
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11.2025 NEW LTC3300 board with LTC3300-2 and 4x WURTH 750312504
One board with one LTC3300.
A single LTC3300-2 can balance up to 6 series-connected circuits, but this board only uses 4 series-connected circuits. battery cells with an input common mode voltage up to 14.4V. 
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Transformer board with WURTH 750312504Two boards with three Transformers
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LTC3300 board with LTC3300-2
One board with one LTC3300.
One LTC3300-2 can balance up to 6 series-connected battery cells with an input common mode voltage up to 36V. 
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Raspberry Pi Pico Micro Controller Board With UART or BLUETOOTH
Control system that receives commands from the UART and sends them to the LTC3300 via the SPI channel.
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LTC3300 LiIon cell organization
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LiC7 = Cell3 BOTTOM
LiC6 = Cell4 BOTTOM
LiC5 = Cell5 BOTTOM
LiC4 = Cell6 BOTTOM
Console for sending commands from PC to Rpi PICO via serial port.
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| 1 Discharge Cell n (Nonsynchronous) 2 Discharge Cell n (Synchronous) 3 Charge Cell n C3 C4 C5 C6 |
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| Osciloscope channel number | file number | CELL | LTC3300 MODE | Volt on the cell before | Volt on the cell after | Measure point, my mark | |
| 1 | 0 | C3 | 1003 | 4,1856 | 4,1831 | C205 (C3G page 49 on DEMO BOARD) | |
| 1 | 1 | C3 | 3001 | 4,1855 | 4,19 | C205 | |
| 1 | 2 | C3 | 1000 | 4,1854 | 4,041 | C205 | |
| 1 | 3 | C3 | 3000 | 4,1848 | 4,753 | C205 | |
| 1 | 4 | C4 | 0103 | 4,1766 | 4,1762 | C5 (C4G page 49 on DEMO BOARD) | |
| 1 | 5 | C4 | 0301 | 4,1766 | 4,1782 | C5 | |
| 1 | 6 | C4 | 0100 | 4,1767 | 4,149 | C5 | |
| 1 | 7 | C4 | 0300 | 4,1763 | 4,196 | C5 | |
| 1,2 | 8 | C4 | 0300 | C5 + P.GATE | |||
| 1,2 | 9 | C4 | 0300 | C5 + S.GATE |
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CELL3 (LiC7) DISCHARGE, CELL4 (LiC6) CHARGE |
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CELL3 (LiC7) DISCHARGE, CELL5 DISCHARGE (LiC5), CELL6 (LiC4) CHARGE |
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Bind bluetooth port as /dev/rfcomm0 (The communication with Raspberry Pico) |
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| sudo rfcomm bind /dev/rfcomm0 98:D3:31:70:6D:86 1 balancer | |
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Raspberry Pico controls communication between LTC3300 and Raspberry Zero and others, using commands.
in Raspberry Zero ~/FTP/Mono start mono RZeroCApp.exe
You can see several lines with open port error. |
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| key="ConnectionString" value="Data Source=192.168.0.116,1433;Initial Catalog=VisualProg;User ID=xxx;Password=xxx;" | Connection strings for MS SQL Server |
| key="table" value="[Tbl_BalancerTemper]" | |
| key="BALANCED_ENAB_AVERAGE_WAIT" value="40" | the number of cycles when cell alignment occurs |
| key="TYPE_ACTION_DISABL" value="true" | |
| key="START_STOP_12HOUR_TIME" value="1/1/2023 09:00:00 AM" | twelve hour period in which cycles will be performed. If the value is 12:00:00, the cycles will not be performed, the measurement will take place approximately every 5 minutes. |
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Example, balancing is running, 32 cycles are left, then measurement and saving to DB will take place. |
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Example, balancing is running, 32 cycles are left, then measurement and saving to DB will take place. |