Battery internal temperature measurement method
A technology of internal temperature and measurement method, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of inaccurate battery average temperature measurement, affecting battery thermal runaway hazards, etc.
Active Publication Date: 2021-06-11
TSINGHUA UNIV
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Problems solved by technology
However, in the prior art, the measurement of the average temperature inside the battery is not accurate enough, which affects the assessment of the hazards of thermal runaway of the battery
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[0049] In order to make the purpose, technical solution and advantages of the present application clearer, the battery internal temperature measurement method of the present application will be further described in detail through the following embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.
[0050] The serial numbers assigned to components in this document, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "connection" mentioned in this application all include direct and indirect connection (connection) unless otherwise specified. In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", The orien...
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Abstract
This application relates to a method for measuring the internal temperature of a battery. First, a cutout is formed on the surface of the aluminum-plastic film of the aluminum-plastic film battery, and then a guide rod is used to guide the temperature sensor into the interior of the aluminum-plastic film battery through the cutout, and then the The guide rod is taken out from the aluminum-plastic film battery and the temperature sensor is left inside the aluminum-plastic film battery, and finally the incision is sealed, and the aluminum-plastic film battery is heated to a state of thermal runaway, using The temperature sensor monitors the temperature of the battery core. Therefore, the temperature inside the aluminum-plastic film battery can be accurately measured by the temperature sensor, and the influence on the structure of the aluminum-plastic film battery can be minimized. By measuring the temperature inside the aluminum-plastic film battery, the internal temperature of the battery can be accurately measured, especially the internal temperature during the thermal runaway process of the battery, which is of great significance for calculating the energy released by thermal runaway and evaluating the risk of thermal runaway.
Description
technical field [0001] The present application relates to the field of batteries, in particular to a method for measuring the internal temperature of a battery. Background technique [0002] Lithium-ion batteries have the advantages of high specific energy, cleanliness, and safety, and are widely used in power output systems of electric vehicles. In order to better meet the requirements of the driving range of automobiles, lithium-ion batteries with high specific energy and large capacity are developing rapidly. Large-capacity lithium-ion batteries usually have two packaging forms: aluminum-plastic film and hard shell. Compared with hard-shell lithium-ion batteries, aluminum-plastic film lithium-ion batteries have more obvious advantages in terms of specific energy because they do not have heavy metal casings and other accessories. However, the safety problem of the lithium-ion battery has not been completely resolved, and thermal runaway is an important cause of safety ac...
Claims
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IPC IPC(8): H01M10/48
CPCH01M10/486Y02E60/10
Inventor 徐成善冯旭宁高尚卢兰光欧阳明高
Owner TSINGHUA UNIV