Top cover assembly, shell and secondary battery
A secondary battery, top cover technology, applied in the direction of batteries, battery pack components, circuits, etc., can solve the problems of mechanical damage of the transfer piece, short circuit of the cell, etc., to improve the mechanical damage, avoid the rotation of the pole, and improve the short circuit. glitch effect
Pending Publication Date: 2021-05-28
XIAMEN HAICHEN NEW ENERGY TECH CO LTD
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Problems solved by technology
[0004] The inventor found through research that after the secondary battery is installed, the secondary battery may be mechanically damaged under the action of an external force, which may cause a short circuit in the battery cell
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[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.
[0045] After the secondary battery is manufactured, it will be subjected to external force, for example, it will be subjected to external collision force during transportation or use. If the secondary battery is a secondary battery of an electric vehicle (electric vehicle, electric vehicle or hybrid vehicle), during the operation of the electric vehicle, due to different road surfaces or collisions with other objects in the external environment, the secondary battery may be damaged. A short-circuit failure of the battery cell may cause smoke, fire, etc. of the battery cell, and may even cause smoke, fire or explosion of the battery cell module.
[0046] The inventor found that on...
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The invention provides a top cover assembly, a shell and a secondary battery, and belongs to the technical field of secondary batteries. The top cover assembly of a secondary battery comprises a top cover plate, a pole, a fixing piece and a limiting piece. The top cover plate is provided with a first through hole. The pole penetrates through the first through hole. The fixing piece is fixedly connected with one end of the pole protruding out of the top cover plate. At least part of the limiting piece is located between the fixing piece and the top cover plate to separate the fixing piece from the top cover plate. The surface, making contact with the limiting piece, of the top cover plate is a first matching face, the first matching face is provided with a first matching part, the surface, making contact with the top cover plate, of the limiting piece is a second matching face, the second matching face is provided with a second matching part, and the first matching part and the second matching part are in concave-convex matching to limit the limiting piece to rotate with the axis of the first through hole as a rotating shaft. The shell of the secondary battery uses the top cover assembly, so that the phenomenon that a tab connecting part is mechanically damaged under the action of external force on the secondary battery can be improved, and the phenomenon of short-circuit fault of the battery cell can be improved.
Description
technical field [0001] The present application relates to the technical field of secondary batteries, in particular, to a top cover assembly, a casing and a secondary battery. Background technique [0002] New energy vehicles are being widely promoted at home and around the world, but there are still many things to improve in order to completely replace fuel vehicles. For example, the mileage of the car is small, the cost of the battery pack is high, and the reliability of the battery pack needs to be further resolved. Based on the above problems, higher requirements are put forward for the secondary battery, which is the core part of electric vehicles, such as the need for the secondary battery to achieve higher energy density and lower cost. [0003] At present, the secondary battery generally adopts a square hard shell structure. The secondary battery shell includes a shell and a top cover assembly. The secondary battery shell provides a closed space to accommodate the e...
Claims
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Login to View More IPC IPC(8): H01M50/15H01M50/176H01M50/553H01M50/586
CPCH01M2220/20Y02E60/10
Inventor 吴婷婷冯俊敏张万财
Owner XIAMEN HAICHEN NEW ENERGY TECH CO LTD