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Automobile and equalization method and device of power battery pack

A power battery pack and equalization method technology, applied in battery circuit devices, circuit devices, battery/fuel cell control devices, etc., can solve problems such as inability to accurately predict SOC, achieve balanced management, prolong service life, and improve utilization Effect

Active Publication Date: 2019-10-11
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (2) It is impossible to accurately predict the dislocation of SOC (State Of Charge, battery state of charge);
[0008] (3) If the SOC misalignment is large, the alignment cannot be completed at one time

Method used

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  • Automobile and equalization method and device of power battery pack
  • Automobile and equalization method and device of power battery pack
  • Automobile and equalization method and device of power battery pack

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Embodiment Construction

[0038] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0039] The balancing method for the power battery pack, the balancing device for the power battery pack and the vehicle with the device according to the embodiments of the present invention will be described below with reference to the accompanying drawings.

[0040] figure 1 is a flow chart of a balancing method for a power battery pack according to an embodiment of the present invention.

[0041] In an embodiment of the present invention, the power battery pack may include a plurality of single cells connected in series, where...

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Abstract

The invention discloses an automobile and an equalization method and device of a power battery pack, and the method comprises the following steps: obtaining a high-voltage inflection point of a charging curve of a battery cell of the power battery pack, obtaining the capacity of the battery cell according to the high-voltage inflection point of the battery cell, and carrying out the equalization of the battery cell according to the capacity of the battery cell. Therefore, the equalization management of the power battery pack can be realized, the utilization rate of the power battery pack is improved, and the service life of the power battery pack is prolonged.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to an equalization method for a power battery pack, an equalization device for a power battery pack and an automobile with the device. Background technique [0002] The voltage of a single power battery (such as lithium ion) is only a few volts, and the capacity of a single battery is relatively small. Whether it is in the application of electric vehicle power source or in the field of backup power supply, the electrical characteristics of the power battery battery cannot meet the working conditions. Lower the load's demand for voltage and current. Therefore, in order to increase the capacity and voltage of the power battery, it is necessary to connect several single cells in series to form a group. At present, series battery packs have been widely used in the fields of electric vehicles and backup power sources. [0003] After the batteries are used in groups, the life, capaci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
CPCH02J7/0014H01M10/482B60L58/22H02J2310/48H02J7/0048H01M10/441H01M10/425H01M2010/4271H01M2220/20Y02E60/10Y02T10/70B60L58/12
Inventor 冯天宇邓林旺吕纯林思岐杨子华
Owner BYD CO LTD
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