Battery cell, electrochemical device and electronic equipment

An electrochemical and battery technology, applied in the field of energy storage devices, can solve the problems of shortened battery cycle life, insufficient battery life, battery capacity attenuation, etc., and achieve the effect of improving interface flatness, reducing increase, and extending cycle life

Pending Publication Date: 2021-07-30
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing technology, the battery life is not long enough, the capacity drops sharply with the increase of charging times, and it is easy to cause accidents when it is pierced by external force.
[0003] Specifically, for the soft pack lithium battery in the prior art, during the charge-discharge cycle, due to the lithium intercalation behavior of the negative electrode material, the battery cell expands or the battery pole pieces are deformed, and the thickness of the battery cell becomes thicker. The battery capacity decays rapidly, resulting in a shortened cycle life of the entire battery

Method used

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  • Battery cell, electrochemical device and electronic equipment
  • Battery cell, electrochemical device and electronic equipment
  • Battery cell, electrochemical device and electronic equipment

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Embodiment Construction

[0035] Embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. Aspects of the present application may be understood more readily by reading the following description of specific embodiments with reference to the accompanying drawings. It should be noted that these embodiments are only exemplary, which are only used to explain and illustrate the technical solutions of the present application, rather than limiting the present application. Those skilled in the art can make various modifications and transformations on the basis of these embodiments, and all technical solutions obtained through equivalent transformations belong to the protection scope of the present application.

[0036] figure 1 It is a three-dimensional schematic diagram of the electric core provided according to the first embodiment of the present application. Such as figure 1 As shown in , the battery cell 100 provided according to the present a...

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PUM

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Abstract

The invention relates to a battery cell, an electrochemical device and electronic equipment. The battery cell comprises an electrode assembly and a shell. The electrode assembly is provided with a first surface and a second surface, the second surface is opposite to the first surface, and a thickness exists between the first surface and the second surface. The shell accommodates the electrode assembly and is provided with a first flat plate, a second flat plate and an elastic piece arranged between the first flat plate and the second flat plate, the first flat plate and the second flat plate are oppositely arranged, and the first flat plate and the second flat plate make contact with the first surface and the second surface of the electrode assembly respectively. The elastic piece enables the thickness between the first flat plate and the second flat plate to change along with the change of the thickness of the electrode assembly. According to the battery cell with the structure, the attenuation and expansion speed can be effectively delayed, so that the cycle performance of the battery cell is improved, and meanwhile, the manufacturing cost of the battery cell is not greatly increased; in addition, accidents caused by puncturing by external force can be effectively prevented.

Description

technical field [0001] The present application relates to an energy storage device, in particular to an electric core for a soft-packaged secondary battery, an electrochemical device including the electric core, and an electronic device including the electrochemical device. Background technique [0002] Due to the increasing demand for energy saving and environmental protection, electric vehicles such as electric bicycles and electric vehicles are more and more widely used. For this type of electric vehicle, the battery plays a pivotal role and significance as a power source, which is directly related to the manufacturing cost, service life, safety performance, etc. of this type of electric vehicle. However, in the prior art, the battery life is not long enough, the capacity drops sharply with the increase of charging times, and accidents are prone to occur when being punctured by external force. [0003] Specifically, for the soft pack lithium battery in the prior art, dur...

Claims

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Application Information

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IPC IPC(8): H01M50/102H01M50/131H01M50/14
CPCH01M2220/20H01M50/102H01M50/131H01M50/14Y02E60/10
Inventor 余舒娴宋可为明帮生
Owner NINGDE AMPEREX TECH
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