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Lithium ion battery

A lithium-ion battery and battery protection board technology, which is applied to secondary batteries, battery pack components, circuits, etc., can solve the problems of firmness, troublesome assembly operations, and poor strength of end cap heads, and achieves enhanced firmness, Meet the needs of use and ensure the effect of strength

Active Publication Date: 2012-02-01
SHENZHEN BAK POWER BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: the manufacturing process of the overall glue filling is relatively complicated, the cost is also high, and the degree of firmness between the end cover and the battery cell is relatively strong, and because the end cover is molded by low-temperature and low-pressure injection molding, the head of the end cover The internal strength is poor, which affects the performance of the battery
However, the disadvantage of this method is that screws need to be screwed during assembly, and there are many parts, cumbersome assembly operation, high cost, and the existence of screw holes is likely to cause liquid leakage, which affects the yield of the battery.

Method used

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Examples

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Embodiment Construction

[0019] Such as Figure 1 to Figure 4 A lithium-ion battery shown includes a cell 2 , a battery protection plate 6 , an end cap 5 , a tail cap 1 , a positive tab 8 , and a negative tab 7 . The inside of the battery cell 2 includes a positive electrode sheet, a negative electrode sheet, a current collector, a diaphragm, and an electrolyte. The battery cell 2 adopts a metal shell and is packaged after liquid injection. The positive pole ear 8 and the negative pole ear 7 are connected to the positive and negative pole pieces inside the battery core. The battery protection board 6 has functions such as overcharge, overdischarge, overcurrent, high temperature protection, etc., to ensure the safety of battery use. During assembly, PVC insulation film 3 is used to insulate and isolate the battery protection plate 6 from the upper end surface of the battery cell. The upper surface of the battery protection board 6 is provided with a plurality of electrical terminals (golden fingers) ...

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Abstract

The invention discloses a lithium ion battery, comprising a battery core, a battery protective plate and an end cover, wherein, the battery protective plate is fixed between the battery core and the end cover and connected with the anode ear and cathode ear of the battery core electrically, the end cover is provided with a fixed column or fixed groove, the portion of the battery protective plate corresponding to the fixed column or fixed groove of the end cover is provided with a fixed groove or fixed column, the fixed column is inserted into the fixed groove with close fitting, and a hot melt adhesive is injected among the battery core, the battery protective plate and the end cover for fixing. The invention guarantees the stability of the connection between the end cover and the battery protective plate when being assembled, and achieves the advantages of no need of twisting screws, no damage to the battery core, and simple technology.

Description

technical field [0001] The invention relates to a lithium ion battery. Background technique [0002] As a new type of high-capacity, safe, environmentally friendly and non-polluting rechargeable battery, lithium-ion batteries have been widely used in mobile phones, notebook computers, PDAs and other devices in recent years, and have become the standard configuration of these electronic devices. [0003] Lithium-ion batteries are generally composed of batteries, battery protection boards, and plastic casings. The battery protection board is placed between the battery inside the casing and the casing. The plastic casing is used to fix the relative position of the battery cell and the battery protection board and protect the protection circuit board. The inside of the cell contains positive and negative electrodes, a diaphragm and electrolyte, and the outside of the cell is provided with positive and negative tabs connected to the internal positive and negative electrodes res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M2/04H01M2/14
CPCY02E60/122Y02E60/10
Inventor 宋琦刘春山
Owner SHENZHEN BAK POWER BATTERY CO LTD
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