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Lithium ion battery pack

A technology for lithium-ion battery packs and battery cells, which is applied to battery pack parts, secondary batteries, secondary battery repair/maintenance, etc., can solve the problems of battery cell chemical reaction boundary control, etc., to curb further development and reduce Reaction rate, volume reduction effect

Pending Publication Date: 2019-04-05
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a lithium-ion battery pack for the problem that the traditional lithium-ion battery cannot control the chemical reaction boundary inside the battery cell

Method used

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  • Lithium ion battery pack
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Embodiment Construction

[0056]In order to make the purpose, technical solutions and advantages of this application clearer, the lithium-ion battery pack provided by this application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.

[0057] The various technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the various technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

[0058] The present application provides a lithium-ion battery pack 100 . It should be noted that the lithium-ion battery pack 100 provided in this application ...

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Abstract

The application provides a lithium ion battery pack including a housing, a bracket and a plurality of battery cells. The housing includes a top cover plate, a bottom cushion plate, and a plurality ofwall plates connected end to end. Each wall plate is provided with a window door in order that the battery cells can freely enter and exit the housing through the window doors. On the one hand, the lithium ion battery pack provided by the present application is provided with the bracket in the housing to divide the storage space in the housing into a plurality of separately closed sub-receiving spaces, thereby greatly reducing the reaction volume of the electrolyte inside the lithium ion battery pack during thermal runaway, greatly reducing the reaction rate of the electrolyte, and further suppressing the further development of the thermal runaway. On the other hand, the window doors are disposed on the wall plates of the housing, the battery cells in the lithium ion battery pack can be moved out of the housing through the window doors during the thermal runaway, thereby avoiding further intense chemical reactions inside the lithium ion battery pack.

Description

technical field [0001] The present application relates to the technical field of lithium-ion batteries, in particular to a lithium-ion battery pack. Background technique [0002] In recent years, the market share of electric vehicles has steadily increased. Lithium-ion batteries have excellent properties such as high voltage, high specific energy, long cycle life and no pollution to the environment, and have received great attention from the electric vehicle industry. However, flammable mixed gases such as H 2 , CO or CH 4 etc., accumulate inside the battery. After reaching a certain pressure limit inside the lithium-ion battery, the safety valve is flushed open by the combustible gas mixture, which is released into the external environment as the battery erupts. During the eruption process of the battery, the surface temperature of the lithium-ion battery can reach a maximum of about 1000°C, and the internal temperature of the lithium-ion battery cell is higher, often a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/10H01M10/0525H01M10/42H01M10/48H01M50/249
CPCH01M10/0525H01M10/425H01M10/488H01M50/20Y02E60/10
Inventor 李伟峰王贺武欧阳明高张亚军李成李建秋卢兰光韩雪冰杜玖玉冯旭宁
Owner TSINGHUA UNIV
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