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Heat dissipation method for a power battery pack

A technology of power battery pack and heat dissipation method, applied in the field of electronics, can solve problems such as affecting battery life and achieve the effect of convenient management

Inactive Publication Date: 2017-09-29
BEIJING SHANXIN DINGZHONG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the temperature difference between the battery modules caused by the uneven temperature field and flow field of the battery pack, thus affecting the life of the battery

Method used

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  • Heat dissipation method for a power battery pack
  • Heat dissipation method for a power battery pack

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 and figure 2 As shown, a heat dissipation device for a power battery pack, the battery pack includes a plurality of interconnected battery modules 1 (1a, 1b, to 1h in the figure) and a main control unit BMS3, and the battery module 1 has 8 One, according to the needs in the example, the number is not limited, the main control unit is the battery management system is a known technology, the battery module 1 is equipped with a cooling fan 2 (2a, 2b, to 2h in the figure), There are 8 in the figure, and the number is the same as that of the battery module 1 as required in the example. Can be applied to battery packs with irregular shapes. At the same time, a standardized design of the battery module 1 can be carried out, which facilitates group configuration of battery packs of different capacities, and the components of the battery module 1 do not need to be molded again; design, development and manufacturing costs can be reduced.

[0027] At the same ...

Embodiment 2

[0037] A heat dissipation method for a power battery pack, based on the device of Embodiment 1, the method includes:

[0038] When the communication between the battery module control unit BMU4 and the main control unit BMS3 is normal, the battery module control unit BMU4 collects the temperature of the battery module 1 and sends it to the main control unit BMS3, and the main control unit BMS3 issues a cooling command to the cooling fan 2. Control; control the opening and closing of the cooling fan 2, and control its speed.

[0039] When the communication between the battery module control unit BMU4 and the main control unit BMS3 is interrupted, the battery module control unit BMU4 directly controls the cooling fan 2 of a single battery module 1 according to the collected temperature of the battery module 1, and controls the cooling fan 2 The opening and closing of the battery, as well as controlling its rotational speed, thereby controlling the temperature of multiple battery...

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Abstract

The invention discloses a heat dissipation device and method for a power battery pack. The battery pack comprises multiple battery modules (1) which are mutually connected and a main control unit BMS (3). The heat dissipation device for the power battery pack is characterized in that each battery module (1) is provided with a heat dissipation fan (2), and meanwhile each battery module (1) is further provided with a temperature controller correspondingly; each temperature controller comprises a battery module control unit (BMU) (4), a PMW fan controller (5) and a temperature sensor (6); each battery module control unit (BMU) (4) collects a battery module (1) temperature signal detected by the corresponding temperature sensor (6), the corresponding heat dissipation fan (2) is controlled to work through the corresponding PMW fan controller (5) according to the temperature signal, and therefore the temperature of the corresponding battery module (1) is controlled. The method can control temperature differences among the battery modules in the battery pack and conduct self temperature protection. The problem that the service life of batteries is affected by the temperature differences among the battery modules caused by uneven battery pack temperature fields and flow fields is solved.

Description

technical field [0001] This patent relates to the field of electronic technology, in particular to a heat dissipation device and method for a power battery pack. Background technique [0002] With the society's advocacy of the concept of green travel and environmental protection, electricity is widely used as a clean energy source, among which electric vehicles are the most widely used, and of course it will also be applied to other fields of electric energy storage. Although its power battery pack is composed of multiple battery modules connected in parallel or in series, its heat dissipation is usually a single fan for the entire battery pack, especially for battery packs with irregular appearance, the internal heat dissipation structure of the battery pack is complicated, and The heat dissipation paths of each battery module are inconsistent in length. Due to the uneven heat dissipation, the temperature difference between the battery modules is relatively large, which af...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/613H01M10/625H01M10/647H01M10/6563H01M10/48
CPCH01M10/482H01M10/486H01M2220/20Y02E60/10
Inventor 詹天佑赵云
Owner BEIJING SHANXIN DINGZHONG TECH
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