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Secondary battery of blind flange

A secondary battery and cover plate technology, applied in the field of lithium-ion batteries, to achieve the effects of increasing battery space, increasing battery capacity, and improving welding positions

Inactive Publication Date: 2011-03-23
HYB BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Moreover, all the prior art has not noticed such a problem: the structure design of the sealing cover plate of the traditional lithium-ion battery is unreasonable, and the rivet type metal fasteners If the protrusion is too long, the position of the metal soldering piece is very low. In order to prevent the metal soldering piece from contacting the electrode plate below it and causing a short circuit, it is necessary to keep a certain distance between the welding position of the negative tab and the electrode plate, so the width of the electrode plate is in Sufficient margin should be left in the design, so that the internal space of the battery cannot be fully utilized, and it is difficult to increase the specific capacity of the battery

Method used

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  • Secondary battery of blind flange
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  • Secondary battery of blind flange

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as Figure 5 , which is a schematic diagram of the assembly structure of the cover plate of the battery embodiment 1 of the present invention. The lower surface of the cover plate 1 has a groove 12 closed all around, and the groove 12 is equipped with a sealing gasket 2 and a nickel sheet 3, and the fastening rivet 4 fastens one end of the sealing gasket 2 and the nickel sheet 3, and the sealing gasket 2 and a part of the laminate formed by stacking the nickel sheet 3 is embedded in the groove 12 of the upper cover plate 1, so that the welding position of the negative tab (not shown - the same below) below it is greatly improved, thereby saving the inner space. The cover plate 1 adopts side welding, and the manufacturing process is easy.

[0034] Such as Figure 6 , 7 , 8, shown are respectively the front view, B-B section and rear view schematic diagram of the cover plate 1 of embodiment 1, it can be seen that the cover plate 1 has counterbore holes 10, rivet h...

Embodiment 2

[0037] Such as Figure 10 , which is a schematic diagram of the assembly structure of the cover plate according to Embodiment 2 of the present invention. The lower surface of the cover plate 1 has a concave stepped structure 12, the groove 12 is fitted with a gasket 2 and a nickel sheet 3, and the fastening rivet 4 fastens one end of the gasket 2 and the nickel sheet 3 to form a layered structure. The laminated body is embedded into the groove 12 of the upper cover plate 1, and the gasket 2 and the nickel sheet 3 are embedded in the aluminum upper cover plate, so that the installation thickness of the combined cover plate 1 is greatly reduced, and the welding of the negative electrode tab below is greatly reduced. The position is greatly improved and the inner space is saved. The cover plate adopts vertical welding, and the manufacturing process is easy.

[0038] Such as Figure 11 , 12 , 13, shown are respectively the front view, C-C section and rear view schematic diagra...

Embodiment 3

[0041] Such as Figure 15 , which is a schematic diagram of the assembly structure of the cover plate according to Embodiment 3 of the present invention. The lower surface of the cover plate has a step structure 12 with two layers of concave grooves 120, 121 with different depths. The step structure 12 is equipped with a gasket 2 and a nickel sheet 3, and the gasket 2 and the nickel sheet are fastened by the rivets 4 for fastening. sheet 3, so that the laminated body formed by stacking it is embedded in the stepped structure 12 of the upper cover plate 1, and the gasket 2 and the nickel sheet 3 are embedded in the stepped structure 12 of the aluminum upper cover plate 1, so that the negative tab below it The welding position is greatly improved, the length of the rivet is reduced, and the inner space is saved. The cover plate adopts side welding, and the manufacturing process is easy.

[0042] Such as Figure 16 , 17 , which are respectively the front view and the D-D cros...

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Abstract

The invention is concerned with the new secondary cell especially the lithium ion cell, it consists of the metal shell, the top cover board, the positive and negative plate in the shell, the membrane, the electrolyte and the conducting pole ear. It is: fixes the fixing piece on the cover board that can conduct, the fixing piece cascade fixes the insolating sealing underlay and the one end of the metal welding piece on the bottom surface of the cover board; the bottom surface of the cover board is the step structure with hollow, the sealing underlay and the welding piece forms the cascade embed in the hollow of the step structure. The advantages are: the optimizing cover board structure, the bigger inner space of the cell, the higher specific capacity of the cell.

Description

technical field [0001] The present invention relates to a chemical power source, more specifically, the present invention relates to an ion battery, especially a lithium ion battery, which can be widely used in communication energy and consumer electronic products. [0002] Background technique [0003] Due to its high voltage, large capacity and good cycle performance, lithium-ion batteries are increasingly used in mobile communications, computers, electric tools, hybrid vehicles and other fields, and their sales in the world market are growing rapidly. Capabilities are also expanding. One of them is a lithium battery with a casing made of aluminum or aluminum alloy. [0004] With the continuous expansion of the application field of lithium-ion batteries and the continuous improvement of functional requirements, the requirements for battery capacity are also getting higher and higher. Since so far, every 1% increase in the specific capacity, the qualified rate and selling...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/04H01M2/04H01M10/36H01M10/0525H01M50/147H01M50/169
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 江强郑为工孟亚斌李小伟
Owner HYB BATTERY