Cell equalization method and device

A technology of battery equalization and voltage equalization, which is applied to battery circuit devices, circuit devices, and secondary battery charging/discharging, etc., which can solve problems such as inability to discharge batteries, inconsistency of batteries, and short service life of battery packs, so as to increase service time , Improve the effect of user experience

Inactive Publication Date: 2014-05-21
STATE GRID CORP OF CHINA +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method and device for battery equalization to at least solve the problem that the inconsistency of the ba

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  • Cell equalization method and device
  • Cell equalization method and device

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Embodiment Construction

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0027] Based on the problem in the related art that due to the inconsistency of the battery, the battery pack cannot be fully charged when charging, and cannot be exhausted when discharging, resulting in a short service time of the battery pack. Embodiments of the present invention provide a battery equalization method , the flow of the method is as follows figure 1 As shown, including step S102 to step S04:

[0028] Step S102, according to the currently collected voltage information of the battery cells in the battery pack, it is judged whether it is necessary to perform power balance processing on the battery cells, wherein the power balance processing is to balance the voltage of each battery cell in the battery pack to the same value;

[0029] Step S104 , if yes, perform power balance processing on the battery cells according t...

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Abstract

The invention discloses a cell equalization method and a device; the method comprises the following step of determining whether to carry out electric quantity equalization process to a cell monomer or not according to presently collected voltage information of the cell monomer in a cell pack, wherein the equalization processing of the electric quantity refers to equalize the voltage of each cell monomer in the cell pack to a same value; if yes, equalization processing of electric quantity is carried out to the cell monomers according to the monomer position of the cell monomer and charge/discharge directions. The cell equalization method and device can solve the un-consistancy problem of the cell that the cell pack cannot be fully charged in charging and cannot be fully discharged in discharging, so the usage life of the cell pack is short; the method and device can further adjust the voltage of each cell monomer to a same equal value, so the electric quanity of the cell pack can be fully charged or used in usage, thereby improving usage life of the cell, and improving user experience of the user in the usage of the cell pack.

Description

technical field [0001] The present invention relates to the field of batteries, and more specifically, to a battery balancing method and device. Background technique [0002] With the development of power lithium battery technology and pure electric vehicle technology, lithium batteries have replaced traditional lead-acid batteries and nickel-metal hydride batteries and become the core energy storage devices in pure electric vehicles. Since the voltage of a single lithium battery is only 3-4 volts, a large number of lithium batteries are generally required to be connected in series to form a battery pack for a pure electric vehicle. The inconsistency of battery performance due to various reasons puts forward very high requirements on the battery management system. [0003] There are many reasons for the inconsistency of the battery, including the inconsistency of the factory battery capacity and internal resistance caused by the process and other reasons at the factory; the...

Claims

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Application Information

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IPC IPC(8): H02J7/00H01M10/42H01M10/44
CPCY02E60/10
Inventor 李香龙张宝群焦东升焦然马婧珺舒鹏张建辉
Owner STATE GRID CORP OF CHINA
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