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Automobile battery thermal management simulation method

A technology of automobile battery and simulation method, which is applied in secondary batteries, electrical digital data processing, circuits, etc., can solve the problems of inability to meet the early development cycle of battery pack internal structure layout, inability to obtain battery pack temperature distribution, and low analysis accuracy. , to achieve the effect of short simulation calculation time, easy acquisition and improved simulation accuracy

Active Publication Date: 2019-06-07
MAGNA STEYR AUTOMOTIVE TECHNOLOGY (SHANGHAI) LTD
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AI Technical Summary

Problems solved by technology

Its disadvantages are: difficult modeling, long analysis cycle, unable to meet the early development cycle of the internal structure layout of the battery pack
Its disadvantages are: only the average temperature inside the battery pack can be obtained, the analysis accuracy is low, and the temperature distribution inside the battery pack cannot be obtained

Method used

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  • Automobile battery thermal management simulation method
  • Automobile battery thermal management simulation method
  • Automobile battery thermal management simulation method

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Embodiment Construction

[0044] The present invention provides a thermal management simulation method for an automobile battery. Specifically, assuming that the battery pack contains 12 modules, and the battery cells in each module are arranged in the same manner, the method mainly includes the following steps:

[0045] S1: Take a single module as an example, discretize the cells in the battery module into 9 mass points. Engineers can discretely divide the batteries in the module into any number according to actual needs, such as 3, 6, 8, 10 and so on.

[0046] S2: Establish the one-dimensional thermal property models of 9 mass points respectively.

[0047] S3: Establish a heat conduction model between 9 mass points.

[0048] S4: Discrete the material layer between the battery cell and the battery pack case, and each layer of material is divided into 3 parts; the material layer that needs to be discrete here includes the heat conduction layer, the cooling water plate, the heat insulation layer, and t...

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Abstract

The invention relates to an automobile battery thermal management simulation method, which comprises the following steps: assuming that a battery pack internally comprises 12 modules, and the arrangement modes of battery cells in each module are the same, taking a single module as an example, and dispersing the battery cells in the battery modules into 9 mass points; establishing one-dimensional thermal attribute models of the nine quality points respectively; establishing a heat conduction model among the nine mass points; dispersing a material layer between the battery cell and the battery pack shell, wherein each material layer is dispersed into three parts; establishing a discretized material layer thermal attribute model; establishing a heat conduction model among the material layers;establishing a heat conduction model between the material layer and the battery cell; establishing a battery pack model and a cooling water channel model; simulation initial parameter input; repeating the steps until the temperature difference in the battery pack reaches a target value. According to the method, the modeling method is simple, the simulation calculation time is short, the temperature distribution in the module and the battery pack can be obtained, and the simulation precision of the temperature of the battery pack can be improved.

Description

[technical field] [0001] The invention relates to the technical field of thermal management of automobile batteries, in particular to a simulation method for thermal management of automobile batteries. [Background technique] [0002] At present, pure electric vehicles and hybrid vehicles have been widely promoted in China. Unlike traditional vehicles, the heart of pure electric vehicles is the vehicle power battery. As a core component, the performance of the automotive power battery is directly related to the performance, battery life, battery life, and the safety and reliability of the entire vehicle. [0003] At present, lithium-ion batteries have become the first choice for hybrid vehicles and electric vehicles because of their high energy density, high voltage, low self-discharge rate and good stability. However, the capacity of lithium-ion batteries used in hybrid vehicles and pure electric vehicles is much larger than that of lithium-ion batteries commonly used in co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50H01M10/617H01M10/625H01M10/633
CPCY02E60/10
Inventor 张云波
Owner MAGNA STEYR AUTOMOTIVE TECHNOLOGY (SHANGHAI) LTD
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