Battery pack temperature equalization system and active control method

A balanced system and active control technology, applied to secondary batteries, circuits, electrical components, etc., can solve problems such as cold shock, liquid leakage, explosion, and micro damage

Pending Publication Date: 2019-02-19
JILIN UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At the same time, during the cooling process of the battery, when the temperature difference between the initial battery temperature and the cooling liquid flow is large, the temperature of the battery pack fluctuates violently, causing the temperature difference of each single battery to expand rapidly, and even cold shock and micro damage occur, resulting in internal re

Method used

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  • Battery pack temperature equalization system and active control method

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[0010] The present invention will be further described in detail below in conjunction with the drawings:

[0011] As attached figure 1 As shown, the battery pack liquid flow cooling system includes a battery pack 1, a controller 2, a radiator 3, a radiator fan 4, a circulating liquid pump 5, a first control valve V1, a second control valve V2, a first temperature sensor T1 , The second temperature sensor T2, the third temperature sensor T3, the fourth temperature sensor T4, the first three-way valve S1, the second three-way valve S2, characterized in that the controller 2 receives temperature through temperature sensors T1-T4 Signal to regulate the first control valve V1, the second control valve V2, the circulating fluid pump 5, and the radiator fan 4; the circulating fluid pump 5 controls the flow of circulating fluid in the system; the radiator fan 4 controls the environment The air is introduced into the radiator 3 to exchange heat with the coolant flow; the first solenoid va...

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Abstract

In order to reduce the internal friction and performance degradation which are caused by a temperature difference in a battery pack, the invention provides a power battery pack cooling system and an active temperature equalization control method. In a battery pack cooling process, stepped slow rising and slow reduction of a temperature of cooling fluid at an inlet of the battery pack are realizedby judging an average temperature and a maximum temperature difference of various sensors in the battery pack in real time, opening and closing various cooling circuits and regulating rotating speedsof a fan and a water pump, so as to reduce a dramatic temperature fluctuation caused by large temperature difference heat exchange between the cooling fluid at the inlet and the high-temperature battery pack and improve the temperature consistency, the working efficacy and the thermal safety between battery cells in the battery pack.

Description

technical field [0001] The invention belongs to the field of thermal management of electric vehicles and power batteries, and in particular relates to a method for temperature balance control of power battery packs. Background technique [0002] The power battery is a key component of electric vehicles, which directly affects the performance and range of electric vehicles. The electrochemical reaction of the battery is extremely sensitive to the influence of temperature. Severe and changeable driving conditions and high temperature environment will cause the battery temperature to be too high, which will greatly affect the battery capacity, service life and safety. The liquid medium has a stronger heat exchange capacity than the air medium, which is more conducive to the realization of two-way thermal control of cooling and heating and the construction of integrated thermal management of the whole vehicle. For large-capacity and high-power power battery packs, liquid therma...

Claims

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Application Information

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IPC IPC(8): H01M10/613H01M10/617H01M10/635H01M10/625
CPCH01M10/613H01M10/617H01M10/625H01M10/635Y02E60/10
Inventor 张天时张天多林晓东刘春霞刘笑言蒋梦奇王晨旭
Owner JILIN UNIV
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