Battery pack equalization method, device and equipment

An equalization method and technology of equalization device, which are applied to battery circuit devices, circuit devices, charge equalization circuits, etc., can solve problems such as large unbalance, vehicle breakdown, and inability to balance power battery packs, so as to avoid false equalization and improve accuracy. degree of effect

Active Publication Date: 2020-01-03
CONTEMPORARY AMPEREX RUNZHI SOFTWARE TECH LTD NINGDE CITY
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  • Application Information

AI Technical Summary

Problems solved by technology

However, during the use of electric vehicles, there are few cases where the power is discharged to the low end. This equalization method cannot identify the imbalance between the cells in time. It is already very large, which may have caused the vehicle to break down, and the power battery pack cannot be balanced in time, which will affect the balance effect

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  • Battery pack equalization method, device and equipment
  • Battery pack equalization method, device and equipment
  • Battery pack equalization method, device and equipment

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Embodiment Construction

[0027] The characteristics and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only configured to explain the present invention, not to limit the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by showing examples of the present invention.

[0028] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and ...

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Abstract

The invention discloses equalization method, device and equipment of a battery pack. The method comprises the steps of detecting a voltage value and a temperature of a battery cell in the battery packat the last charging stage of the battery pack or when the battery pack is fully charged and charging is stopped, and comparing the voltage value of the battery cell to obtain minimum voltage value of the battery cell; selecting a first voltage threshold according to the temperature of the battery cell having the minimum voltage value, and determining whether the battery cell needed to be equalized exists in the battery pack or not according to the minimum voltage value of the battery cell and the first voltage threshold; determining the battery cell needed to be equalized according to the voltage value of the battery cell in the battery pack, the minimum voltage value of the battery cell and the temperature of the battery cell when the battery cell needed to be equalized exists in the battery pack; and performing equalization on the battery cell needed to be equalized in the battery pack by preset equalization capacity. According to the equalization method of the battery pack, provided by the embodiment of the invention, the unbalance degree among the battery cells can be timely identified, and the equalization judgment accuracy is improved.

Description

technical field [0001] The invention relates to the field of power batteries, in particular to a battery pack equalization method, device and equipment. Background technique [0002] As the core component of new energy vehicles, the power battery system has a direct impact on the performance of the vehicle. The inconsistency of the power battery pack is an important factor leading to the decline in the performance of the entire battery pack. Due to the inconsistency of the single cells, the battery pack may be overcharged earlier than other batteries during the charging phase. Then there is a phenomenon that a certain battery is over-discharged earlier than other batteries. [0003] An unbalanced battery pack has a great impact on the efficiency and safety of the battery pack. It will reduce the capacity and energy utilization of the battery pack, reduce the input and output power levels of the battery pack, and shorten the service life of the power battery pack. In order ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00
CPCH02J7/0016H02J7/0019H02J7/0026
Inventor 吴盖张世昌谭俐李世超颜昱
Owner CONTEMPORARY AMPEREX RUNZHI SOFTWARE TECH LTD NINGDE CITY
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