Control method of supplementary electricity type battery management circuit additionally provided with discharging module

A technology of a battery management circuit and a control method, which is applied to battery circuit devices, charge equalization circuits, arrangement of multiple synchronous batteries, etc., can solve the problems of high difficulty in calibrating current, low passive equalization efficiency, and performance degradation of lithium battery packs. , to achieve the effect of improving the reliability of the system, improving the equalization accuracy, and reducing the cost of improvement

Active Publication Date: 2020-02-07
NO 719 RES INST CHINA SHIPBUILDING IND
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Problems solved by technology

[0002] Due to material characteristics, manufacturing process, working conditions, and aging and decline, after lithium batteries are connected in series, with the increase in the number of uses, the capacity, remaining power and internal resistance of the single battery have differences and gradually expand, resulting in Lithium battery pack performance decline
The industry usually uses a passive balance management circuit to adjust the consistency of the battery, but the passive balance circuit can only adjust the discharge of the single battery with too high power, and cannot realize the supplementary regulation of the single battery with low power. It is an unbalanced state that is more common than that of a single cell, so the efficiency of passive equalization is low. Therefore, a supplementary acti

Method used

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  • Control method of supplementary electricity type battery management circuit additionally provided with discharging module
  • Control method of supplementary electricity type battery management circuit additionally provided with discharging module

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0018] figure 1 It is a supplementary battery management circuit diagram with a discharge module installed.

[0019] In the supplementary battery management circuit, the minimum unit is applied to N battery units connected in series (N is a positive integer greater than 1, and not greater than the number of management channels of the minimum unit of the battery management circuit), and there are N+1 collection Lines B1~BN+1, the acquisition line B1 is connected to the positive pole of the 1# battery, the acquisition line B2 is connected to the positive pole of the 2# battery, until the acquisition line BN is connected to the positive pole of the N# battery, and the acquisition line BN+1 is connected to the negative pole of the N# battery. The positive and negative terminals of N batteries are introduced into the battery management circuit. The...

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Abstract

The invention discloses a control method of a supplementary electricity type battery management circuit additionally provided with a discharging module. According to the control method, a dischargingmodule is additionally arranged on the basis of a supplementary electricity type battery management circuit, so that a discharging equalization function, a charging current calibration function and anexternal line and internal switch state detection function are achieved, bidirectional charging and discharging equalization of the supplementary battery active equalization circuit is achieved, andthe equalization precision of the circuit and the reliability of the system are improved.

Description

technical field [0001] The invention is aimed at the control method of adding a discharge module to the supplementary battery management circuit, which can realize the discharge equalization function, the charging current calibration function and the external circuit and internal switch state detection function, so that the supplementary battery active equalization circuit realizes two-way charging. Discharge equalization, and improve the balance accuracy of the circuit and the reliability of the system. Background technique [0002] Due to material characteristics, manufacturing process, working conditions, and aging and decline, after lithium batteries are connected in series, with the increase in the number of uses, the capacity, remaining power and internal resistance of the single battery appear to be different and gradually expand, resulting in The performance of the lithium battery pack is declining. The industry usually uses a passive balance management circuit to a...

Claims

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Application Information

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IPC IPC(8): H02J7/00H01M10/44
CPCH02J7/0018H01M10/441Y02E60/10
Inventor 邓磊李小谦吴浩伟孔祥伟魏华蔡凯姜波李锐李可维李鹏蔡久青汪文涛吴钫金翔张炜龙张鹏程帅骁睿张正卿
Owner NO 719 RES INST CHINA SHIPBUILDING IND
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