Electrochemical device and electric equipment
An electrical equipment and electrochemical technology, applied in the field of energy storage, can solve problems such as low reliability and energy density loss, and achieve the effect of improving reliability, reducing energy loss, and reducing use.
Active Publication Date: 2021-12-10
NINGDE AMPEREX TECH
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Problems solved by technology
[0003] In view of the above problems, this application provides an electrochemical device and electrical equipment to at least partially solve the energy density loss and reliability caused by the above connection method low problem
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[0058] In order to facilitate the understanding of the present application, the present application will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is said to be "fixed" to another element, it may be directly on the other element, or there may be one or more intervening elements therebetween. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween. The terms "vertical", "horizontal", "left", "right", "inner", "outer" and similar expressions are used in this specification for the purpose of description only.
[0059] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the technical field of this application. The terms used in the description...
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Abstract
The invention relates to an electrochemical device and electric equipment. The electrochemical device comprises an electrode assembly, a heating assembly and a shell; the electrode assembly comprises a first pole piece; and the heating assembly comprises a heating part and a first conductive piece, wherein the heating part is located in the shell, and the first conductive piece comprises a first part and a second part. The first part comprises a first connecting area connected with the heating part, and the second part extends out of the shell. At least one of the following conditions (1) to (2) is met: (1) the first part further comprises a second connecting area connected with the first pole piece; and (2) the heating part comprises a third connecting area connected with the first pole piece. Compared with the prior art that a pole piece and a heating part are respectively connected with conductive pieces and are connected outside a shell, the electrochemical device can assist in reducing the use of inactive conductive pieces, and therefore, the energy density of the electrochemical device is improved, the risk of connection falling off is reduced, and the use reliability of the electrochemical device is improved. In addition, when electric energy stored in the electrochemical device is used for heating, the energy loss of the conductive piece outside the shell can be effectively reduced.
Description
technical field [0001] This application relates to the field of energy storage technology. In particular, it relates to an electrochemical device and electrical equipment. Background technique [0002] As we all know, the use of lithium-ion batteries is greatly affected by temperature. Usually, its charging capacity is reduced in low temperature environment, and the capacity cannot be fully utilized, especially in the cold winter, the phenomenon of loss of battery active material capacity is more prominent, and the voltage platform is reduced, resulting in loss of battery energy density; at the same time, at low temperature In the environment, the electronic conductance and ion conductance of lithium-ion batteries decrease, and the kinetics drop sharply, resulting in lithium-ion battery precipitation during high-rate charging, deteriorating the battery interface, and posing serious safety hazards. Improving the low-temperature performance of lithium-ion batteries by settin...
Claims
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Login to View More IPC IPC(8): H01M10/615H01M10/654H01M10/635H01M10/48H01M50/10
CPCH01M10/615H01M10/654H01M10/635H01M10/486H01M50/10Y02E60/10
Inventor 曹维毅丁宇严坤
Owner NINGDE AMPEREX TECH