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Method and device for testing equivalent heat capacity in battery

A technology of equivalent heat capacity and test method, applied in the direction of measuring device, measuring electricity, material thermal development, etc., can solve problems such as troublesome, complicated test steps of equivalent heat capacity inside the battery, etc., and achieve simple test steps and low test cost. , easy to design effects

Pending Publication Date: 2021-09-28
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, the embodiment of the present invention provides a method and device for testing the equivalent heat capacity inside the battery, which is used to solve the technical problem of complex and cumbersome test steps for the equivalent heat capacity inside the battery existing in the prior art

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  • Method and device for testing equivalent heat capacity in battery
  • Method and device for testing equivalent heat capacity in battery
  • Method and device for testing equivalent heat capacity in battery

Examples

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Embodiment 1

[0069] Embodiment 1 of the present invention discloses a test method for the equivalent heat capacity inside the battery, which is calculated by recording the temperature change of the heat transfer liquid sealed in the airtight container under the condition of no battery and the condition of battery respectively. The battery internal equivalent heat capacity of the battery to be tested has simple steps, easy-to-obtain equipment, and low cost. In the description of the test method of the battery internal equivalent heat capacity in the following text Example 1, the specific steps of the test method are described by taking the number of airtight containers as two as an example, so as to more intuitively and simply illustrate the method disclosed in the present invention. The core and essence of the test method. It should be noted that the number of airtight containers used in the test method of Example 1 is not limited, and the test methods using other numbers of airtight conta...

Embodiment 2

[0121] Embodiment 2 of the present invention discloses a test method for the equivalent heat capacity inside the battery, which is calculated by recording the temperature change of the heat transfer liquid sealed in the airtight container under the condition of no battery and the condition of battery respectively. The battery internal equivalent heat capacity of the battery to be tested has simple steps, easy-to-obtain equipment, and low cost. Compared with the test method for battery internal equivalent heat capacity disclosed in Example 1, the test method for battery internal equivalent heat capacity disclosed in Example 2 sets a test environment without a battery condition and a test environment with a battery in the same airtight container. The test environment of the battery condition, that is, the first airtight container and the second airtight container are the same airtight container, relatively speaking, the equipment is easier to use and can better unify the test env...

Embodiment 3

[0153] Such as Figure 8 and Figure 9 As shown, Embodiment 3 of the present invention provides a test device for equivalent internal heat capacity of a battery, including an airtight container 1 , a battery to be tested 2 , a heat transfer liquid 3 and a temperature measuring component 4 . Among them, the airtight container 1 is used to accommodate the heat transfer liquid 3 and the battery to be tested 2; the temperature measurement assembly 4 is used to measure the temperature of the heat transfer liquid 3 according to the test method of the battery internal equivalent heat capacity disclosed in the first aspect, and the temperature measurement assembly 4 Available as one-piece temperature measuring device or multiple separate temperature sensors.

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Abstract

The embodiment of the invention provides a method and device for testing the equivalent heat capacity in a battery, and the method comprises the steps: sealing first heat conduction liquid with a first liquid parameter in a first closed container, and recording the first temperature of the first heat conduction liquid in a first time period at equal intervals; simultaneously sealing the to-be-tested battery and second heat conduction liquid with a second liquid parameter in a second closed container, and recording a second temperature of the second heat conduction liquid in a second time period at equal intervals; and calculating the internal equivalent heat capacity of the to-be-measured battery according to the first liquid parameter, the second liquid parameter, the first temperature and the second temperature. According to the technical scheme provided by the embodiment of the invention, the equivalent heat capacity in the battery can be calculated by respectively recording two temperature changes of the heat conduction liquid under two conditions of no battery and existence of the battery, the test steps are simple, the test equipment is easy to obtain, the test device is easy to design, and the method and device are suitable for large-scale batch test and various scenes, and low in overall test cost.

Description

【Technical field】 [0001] The invention relates to the technical field of battery detection, in particular to a method and device for testing the equivalent heat capacity inside a battery. 【Background technique】 [0002] Lithium-ion batteries are widely used in electric vehicles, tablet computers, notebook computers and other fields due to their advantages of high specific energy and light weight. If the battery is not used properly, it will cause thermal runaway of the battery, which will lead to serious safety problems. Therefore, real-time monitoring of the internal temperature of the battery is extremely important to ensure the safety of the battery and users. Obtaining the equivalent heat capacity inside the battery is the premise of realizing the internal temperature of the battery, but there is no good method for how to realize the simple and quick test of the equivalent heat capacity inside the battery. 【Content of invention】 [0003] In view of this, the embodime...

Claims

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Application Information

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IPC IPC(8): G01N25/20G01N25/18G01R31/378G01R31/389
CPCG01N25/20G01N25/18G01R31/378G01R31/389
Inventor 金鹏林鹏孙力
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY