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Measurement method of temperature field distribution inside battery

A technology of internal temperature and measurement method, applied in the application of thermometers, thermometers, measuring devices, etc., can solve problems such as difficulty in obtaining battery temperature field distribution

Active Publication Date: 2016-08-17
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the current acupuncture test can only obtain the temperature of the battery surface, but it is difficult to obtain the temperature field distribution inside the battery

Method used

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  • Measurement method of temperature field distribution inside battery
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  • Measurement method of temperature field distribution inside battery

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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0020] An embodiment of the present invention provides a method for measuring the temperature field distribution inside a battery, which includes the following steps:

[0021] S1: provide a battery, the battery includes at least two stacked single cells, at least define a plane to be analyzed between two adjacent single cells, and arrange at least three temperature sensors on the plane to be analyzed ;

[0022] S2: Carry out a battery acupuncture test at the center of symmetry of the plane to be analyzed, and record the real-time temperatures of the at least three temperature sensors during the test;

[0023] S3: performing a circular isotherm assumption according to the real-time temperature; and

[0024] S4: Based on the circular isotherm assumption, reconstruct the temperature field on the plane to be analyzed, so as to obtain the internal temperature fi...

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Abstract

The invention relates to a method for measuring the internal temperature field distribution of a battery, which includes the following steps: providing a battery, the battery includes at least two stacked single cells, and at least a gap is defined between two adjacent single cells. On the plane to be analyzed, at least three temperature sensors are arranged on the plane to be analyzed; a battery acupuncture test is performed at the center of symmetry of the plane to be analyzed, and the real-time temperatures of the at least three temperature sensors during the test are recorded; performing a circular isotherm assumption according to the real-time temperature; and based on the circular isotherm assumption, reconstructing the temperature field on the plane to be analyzed, so as to obtain the internal temperature field distribution of the battery.

Description

technical field [0001] The invention belongs to the battery field and relates to a method for measuring the temperature field distribution inside the battery. Background technique [0002] Under the dual pressure of energy crisis and environmental pollution, the electrification of automobile power system has become one of the important symbols of automobile development. At present, the power battery system of new energy vehicles mostly uses lithium-ion power batteries with high energy density. However, occasional safety accidents make the lithium-ion power battery system questioned. [0003] At present, the power battery safety testing standards mainly include QC / T743, IEC62133, SAEJ2464, etc. The safety test standards include various possible trigger conditions for power battery thermal runaway, such as overcharge / overdischarge, external short circuit, drop, heating in a hot box, extrusion, seawater immersion, temperature shock, acupuncture and other tests. In the acupun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K13/00
Inventor 冯旭宁张明轩欧阳明高卢兰光何向明武鹏史德芬C·库珀
Owner TSINGHUA UNIV