Cell matching according to capacity is important, especially for industrial batteries, and no perfect match is possible. If slightly off, nickel-based cells adapt to each other after a few charge/discharge cycles similar to the players on a winning sports team.
Assuming the battery pack will be balanced the first time it is charged and in use. Also, assuming the cells are assembled in series. If the cells are very different in State of Charge (SoC) when assembled the Battery Management System (BMS) will have to gross balance the cells on the first charge.
If the cells are very different in State of Charge (SoC) when assembled the Battery Management System (BMS) will have to gross balance the cells on the first charge. This can take a long time as the maintenance balancing currents are generally very small compared to the Ah ratings of the cells (1 to 3mA/Ah).
The protection circuit also safeguards the battery from excessive load current (See BU-304: Protection circuits) With use and time, battery cells become mismatched, and this also applies to lead acid. Cells that develop high self-discharge will lead to imbalance and subsequent failure.
A manufacturer cannot predict the exact capacity when the cell comes off the production line, and this is especially true with lead acid and other batteries that involve manual assembly. Even fully automated cell production in clean rooms causes performance differences.
A battery expert once said: “I have not seen a cell balancing circuit that works.” For multi-cell packs, he suggested using quality Li-ion cells that have been factory-sorted on capacity and voltage. This works well for Li-ion packs up to 24V; packs above 24V should have balancing.
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Katrina Gan on LinkedIn: What is Battery Cell Matching and …
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And the Battery has a C rating that determines the max current it is rated for. I = C*Battery mAh, I should be higher than the max Motor Current. To make it more clear: Motor max = 30A Esc …
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What is Battery Cell Matching and Balancing?
With use and time, battery cells become mismatched, and this also applies to lead acid. Cells that develop high self-discharge will lead to imbalance and subsequent failure.
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What is Cell Matching and How Can It be Done Efficiently?
This article will critically review the cell matching as a part to understand how to extend the battery life of electric vehicle batteries. What is Cell Matching? Cells in lithium-ion...
What is Cell Matching and How Can It be Done Efficiently?
This article will critically review the cell matching as a part to understand how to extend the battery life of electric vehicle batteries. What is Cell Matching? Cells in lithium-ion …
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This article will critically review cell matching as a part of understanding how to extend the battery life of electric vehicle batteries. What is Cell Matching? Cells in lithium-ion batteries are the smallest unit. Multiple cells …
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