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Charging control method for battery pack, electronic device, and storage medium

A charging control method and technology of battery packs, which are applied in the fields of electronic devices, storage media, and battery pack charging control, and can solve the problems of large impact and reduction in cycle performance of battery packs

Pending Publication Date: 2022-06-24
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the capacity of the battery pack decreases rapidly at the end of the cycle due to the charge cut-off condition of the single cell, which has a great impact on the cycle performance of the battery pack.

Method used

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  • Charging control method for battery pack, electronic device, and storage medium
  • Charging control method for battery pack, electronic device, and storage medium
  • Charging control method for battery pack, electronic device, and storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Embodiment 1: The battery pack also includes 6 single cells.

[0065] Step 1: leave the battery pack for 40 minutes;

[0066] Step 2: Set the maximum voltage that the battery pack can withstand to U F =4.3V (ie the second charging voltage);

[0067] Step 3: Charge the battery pack with a constant current of 6A to 25.2V, and then charge it with a constant voltage to 0.02C; record the cut-off voltage and current of each single cell in the battery pack, and mark the single cell with the highest voltage Be the target battery A, record its voltage as U, and its current as I;

[0068] Step 4: Stand still the battery pack for 30 minutes;

[0069] Step 5: Record the voltage of the target battery A after standing still as U';

[0070] Step 6: The charging cut-off voltage of the target battery can be obtained as: U L =OCV F+I’×((U-U’) / I), where the OCV F Open-circuit voltage when the state of charge of the target battery is 101%, I' is the charge cut-off current;

[0071]...

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Abstract

The invention provides a charging control method for a battery pack, and the method comprises the steps: determining a first charging voltage Un of a target battery in the battery pack in the nth charging and discharging cycle, the target battery being a single battery with the highest voltage in the charging process of the nth charging and discharging cycle of the battery pack; determining a second charging voltage UF of the target battery in the nth charge-discharge cycle; in the (n + m) th charging and discharging cycle, the smaller one of the first charging voltage Un and the second charging voltage UF is used as the charging cut-off voltage of each single battery in the battery pack in the charging process, and m is a preset integer larger than or equal to 1. According to the charging control method of the battery pack, the electronic device and the storage medium, the cycle performance of the battery pack can be improved.

Description

technical field [0001] The present application relates to the field of battery technology, and in particular to a charging control method for a battery pack of a battery, an electronic device, and a storage medium. Background technique [0002] A battery pack is generally composed of multiple cells connected in series or in parallel. There will be inconsistencies in the processing or operation of single cells, which will cause the voltage of some single cells to continue to rise while the voltage of some single cells will continue to decrease when the battery pack is charged at a constant voltage. In order to better protect the performance of the battery pack and ensure that the single cell is not overcharged, there are generally two charging cut-off conditions for the battery pack, one is the cut-off voltage and cut-off current of the battery pack, and the other is the cut-off voltage of the single cell. [0003] Generally, the cut-off voltage of a cell is set to be a cons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H01M10/44
CPCH02J7/0013H01M10/441
Inventor 朱珊关婷吴飞
Owner NINGDE AMPEREX TECH
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