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Power battery box cooling structure and control method thereof

A technology for cooling structure and power battery, applied in battery temperature control, battery, secondary battery and other directions, can solve the problems of rigid pipeline structure deformation, low cooling efficiency, etc., to increase the bonding area, improve cooling efficiency, and simple logic Effect

Active Publication Date: 2018-06-01
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of structural deformation and low cooling efficiency of existing rigid pipelines after long-term operation, thereby providing a power battery box cooling structure and its control method

Method used

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  • Power battery box cooling structure and control method thereof
  • Power battery box cooling structure and control method thereof
  • Power battery box cooling structure and control method thereof

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specific Embodiment approach 1

[0032] Specific implementation mode one: combine figure 1 Describe this embodiment in detail, the

[0033] A power battery box cooling structure for cooling the battery module 2 inside the battery box body 1, including two small water storage tanks 3, a flexible water jacket 4, a cooling water tank 6, a heat exchanger 7 and a water pump 8;

[0034] A small water storage tank 3 is respectively provided at both ends of the battery box body 1, and a plurality of battery modules 2 are arranged between the two small water storage tanks 3. The battery module 2 is formed by a plurality of battery arrays, adjacent to each other. A flexible water jacket 4 is provided between the battery modules 2, one end of the flexible water jacket 4 is used as a water inlet to communicate with a small water storage tank 3, and the other end of the flexible water jacket 4 is used as a water outlet to communicate with another small water storage tank 3 , outside the battery box body 1, two small wate...

specific Embodiment approach 2

[0040] Specific implementation mode two: combination figure 2 with image 3 Specifically explain this embodiment, a method for controlling the cooling structure of a power battery box described in this embodiment, the method is to use the digital PID controller to receive the collected actual temperature of the battery module 2 to control the output speed of the water pump 8 and pressure, including the following steps:

[0041] Step 1, initialization, let t=2, u(1), e(1) and e(0) are all 0;

[0042] u(t), e(t) are the difference between the output voltage of the digital PID controller, the actual temperature and the target temperature;

[0043] Step 2, the battery management system collects the actual temperature T(t) of the battery module 2;

[0044] Step 3. Calculate the actual temperature T(t) and the target temperature T 1 The difference e(t), e(t)=T(t)-T 1 ;

[0045] Step 4. Determine whether e(t) is less than or equal to the set temperature difference T μ , if th...

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Abstract

The invention provides a power battery box cooling structure and a control method thereof, and belongs to a battery box cooling technology. According to the structure and the control method thereof, the possible problems that the existing rigid pipeline is deformed in structure, and the cooling efficiency is low after the existing rigid pipeline operates for a long time, are solved. In the structure, a flexible water jacket is arranged between adjacent battery modules; two small water storage tanks are communicated with each other by an external water channel outside a box body of a battery box, so as to form a circulation waterway; a cooling water tank, a heat exchanger and a water pump are sequentially arranged on the external water channel in the direction of water flow. According to the method, the actual temperature T(t) of the battery modules is collected, the difference e(t) between the actual temperature T(t) and the target temperature T1 is calculated, the output voltage u(t)is calculated by a digital PID (proportion integration differentiation) controller, the PWM (pulse-width modulation) waveform U(t) of the input voltage of a water pump motor is determined, the corresponding rotation speed n(t) is output by the water pump motor according to the U(t), and the corresponding pressure F(n) is output by the water pump. The structure is suitable for cooling batteries.

Description

technical field [0001] The invention relates to battery box cooling technology. Background technique [0002] Due to space constraints, the battery pack is arranged relatively compactly inside the electric vehicle, and the temperature is likely to be too high. If there are no reasonable cooling measures, the temperature of the battery pack will rise, the charge and discharge performance of the battery pack will decrease, and the battery will be overcharged and overdischarged, resulting in shortened battery life. The main cooling methods currently used are air cooling, liquid cooling, and phase change material cooling. Liquid cooling has become the preferred solution for many electric vehicles because of its good cooling effect. [0003] Patent applications 201510591143.9 and 201710301415.6 are aimed at cooling water jackets for cylindrical batteries. The water jackets are set in the shape of a flat tube and arranged around the battery in a wave shape. The wavy arc part fit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/613H01M10/625H01M10/63H01M10/633H01M10/653H01M10/6556H01M10/6568H01M2/10H01M50/249
CPCH01M10/613H01M10/625H01M10/63H01M10/633H01M10/653H01M10/6556H01M10/6568H01M2220/20H01M50/20Y02E60/10
Inventor 吴晓刚王文博
Owner HARBIN UNIV OF SCI & TECH
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