Battery equalizing device

A battery equalization and equalization technology, applied in the field of electronics, can solve the problem of inability to effectively eliminate the differences of single cells in the battery pack

Active Publication Date: 2011-03-16
力高(山东)新能源技术股份有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem in the related art that the differences between the single cells in the battery pack cannot be effectively eliminated, the present invention proposes a battery

Method used

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Examples

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Embodiment Construction

[0017] Aiming at the problem that the differences among the single cells in the battery pack cannot be effectively eliminated in the related art, the present invention proposes that the voltage acquisition by the controller is used to determine the differences between the battery cells (also called single cells) and the need to balance battery cells, and the resistors are connected in parallel to the battery cells that need to be balanced by the resistance switching circuit, so that the balance between the battery cells can be intelligently performed, the difference between the battery cells can be effectively reduced, and the volume and size of the device can be saved. cost.

[0018] Embodiments of the present invention will be described in detail below.

[0019] According to an embodiment of the present invention, a battery balancing device is provided, which is used to balance a plurality of battery cells in a battery pack (for example, a lithium battery pack) by using a ba...

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Abstract

The invention discloses a battery equalizing device used for equalizing multiple battery units in a battery pack by utilizing an equalizing resistance, which comprises a controller, a resistance switching circuit and the equalizing resistance, wherein the resistance switching circuit is used for connecting the battery units specified by the equalizing resistance and the controller in parallel under the control of the controller; and the controller is used for collecting the voltage value of each battery unit in the multiple battery units, determining the residual electricity quantity of each battery unit according to the collected voltage and controlling the resistance switching circuit to connect the equalizing resistance with the battery unit in parallel under the circumstance that one battery unit meets the switching conditions, wherein the switching condition is as follows: the residual electricity quantity of the battery unit is higher than the specified value of the average residual electricity quantity of the multiple battery units. The battery equalizing device can intelligently equalize the battery units, effectively reduce the difference between the battery units and cansave the volume and the cost of equipment.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a battery balancing device. Background technique [0002] In recent years, power lithium battery packs have become more and more widely used in scenarios such as electric vehicles and large backup power supplies. Usually, a power lithium battery pack is generally composed of multiple single cells connected in series and in parallel. Since the battery pack contains multiple single cells, it is necessary to ensure the consistency between the single cells. If there is a difference between the single cells and cannot be balanced in time, this difference will be reflected in the battery pack. It will be further increased during daily use, and eventually the capacity of the entire battery pack will be seriously attenuated. [0003] The process of balancing the battery pack is usually to dynamically adjust the consistency difference of the single cells in the battery pack with the...

Claims

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Application Information

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IPC IPC(8): H02J7/00
Inventor 柳海龙刘新天姚高亮杨志华
Owner 力高(山东)新能源技术股份有限公司
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