Charging system, charging method, and non-transitory computer-readable recording medium

By using the acquirer and controller in the charging system, obtaining the voltage between the terminals of the battery pack and changing the charging mode when the target voltage is reached, the charging reliability problems caused by abnormalities such as self-short circuit in the battery pack are solved, and higher charging reliability is achieved.

CN113472025BActive Publication Date: 2025-03-25NECRA FIELD ENGINEERING CO LTD
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Patent Information

Application Number
CN202110346243.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2020-03-31
Filing Date
2021-03-31
Publication Date
2025-03-25
Estimated Expiration
2041-03-31

AI Technical Summary

Technical Problem

Deterioration or similar phenomena may occur in the battery pack, resulting in abnormalities such as self-short circuit of the battery unit, thereby reducing the reliability of charging.

Method used

A charging system is designed, including a acquirer and a controller, which obtains the inter-terminal voltage or cell voltage of each battery cell in the battery pack as the acquisition voltage. The controller changes the charging mode when the target voltage is reached, transitions from the fast charging mode to the low current charging mode, and stops the charging operation when the acquisition voltage is reduced.

Benefits of technology

Through this method, the reliability of charging of the battery pack is improved and the possibility of charging failure caused by abnormalities such as internal short circuits is reduced.

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Abstract

The object of the present disclosure is to improve the reliability associated with charging of a battery pack. A charging system (100) is configured to charge a battery pack (5) including one or more battery cells (50). The charging system (100) includes an acquirer (11) and a controller (12). The acquirer (11) is configured to acquire a terminal voltage (V1) or a cell voltage of each of one or more battery cells (50) in the battery pack being charged as an acquired voltage. The controller (12) is configured to, when the terminal voltage (V1) or the cell voltage reaches a target voltage, cause a first charging mode that allows fast charging to transition to a second charging mode in which the charging current is lower than in the first charging mode. The controller (12) is configured to stop the charging operation when the acquired voltage acquired by the acquirer (11) in the second charging mode decreases and one aspect of the decrease in the acquired voltage satisfies a predetermined condition.
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