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Lithium ion battery combination block

A lithium-ion battery and cap technology, which is applied to battery pack components, circuits, electrical components, etc., can solve the problems of safety accidents and the lack of safety protection devices for the combined caps.

Active Publication Date: 2013-02-13
DONGGUAN AMPEREX TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, for more and more electric tool batteries, such as electric vehicle batteries, the thermistor can no longer be used due to the need for high-rate discharge. Therefore, there is no safety protection device for the combined cap of the high-rate discharge battery. prone to safety accidents

Method used

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  • Lithium ion battery combination block
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  • Lithium ion battery combination block

Examples

Experimental program
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Effect test

Embodiment Construction

[0025] see figure 1 , The first embodiment of the lithium ion battery combination cap of the present invention includes: a top cover 1 , a rubber ring 2 , a current fuse 3 , an explosion-proof disc 4 , an orifice plate 5 and an insulating gasket 6 .

[0026] The top cover 1 is a stepped disc with an annular base portion 10 . The annular inner edge of the base portion 10 protrudes upward to form an inclined portion 12 and a circular top 14 . The inclined portion 12 is provided with a number of ventilation holes 16 .

[0027] The rubber ring 2 is a stepped hollow cylinder, wherein the closed end 22 is the larger diameter, and the holding end 24 is the smaller diameter. The outer wall of the closed end 22 near the retaining end 24 is slightly contracted inward to form a constriction 220 . The inside of the rubber ring 2 is provided with a stepped through hole 26 , and the diameter of the through hole 26 at the closed end 22 is adapted to the outer diameter of the top cover 1 . ...

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Abstract

The invention discloses a lithium ion battery combination block, comprising a rubber gasket and a capping, a current fuse, an explosion-proof plate, a hole plate and an insulation spacer, which are arranged in through holes of the rubber gasket; the hole plate is connected with the explosion-proof plate via a welding spot; the insulation spacer is used for housing and supporting the hole plate; the current fuse is electrically connected between the explosion-proof plate and the capping. The current fuse comprises a sheetmetal and an annular insulating plates, wherein the sheetmetal comprises a fuse link and two conducting plates connected each other by the fuse link. When the current of the lithium ion battery exceeds the rated value, the current fuse burns out and cuts the circuit. Relative to the prior art, the current fuse of the lithium ion battery combination block ensures the safety of the battery; when the battery is discharged in big current, the current fuse burns out and cuts the current so as to protect the safety of the battery under the conditions of external short circuits and internal short circuit of one battery in a banked battery, etc.

Description

technical field [0001] The invention relates to a lithium ion battery combined cap, in particular to a cylindrical lithium ion battery combined cap. Background technique [0002] Lithium-ion batteries have high energy density and various excellent properties, so their applications are becoming more and more popular. Cylindrical lithium-ion batteries hold a significant share in the lithium-ion battery market due to their standardized size, mature processes, and equipment. [0003] A large number of applications of lithium-ion batteries make their safety more and more a subject of concern and research. For energy-type lithium-ion batteries, a thermistor can usually be designed to protect its safety. When a short circuit occurs inside or outside the battery and a large current is generated, the thermistor can prevent safety accidents. [0004] However, for more and more power tool batteries, such as batteries for electric vehicles, the thermistor can no longer be used because...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/04H01M2/34H01M50/152H01M50/583H01M50/591
CPCY02E60/12Y02E60/10
Inventor 邓平华吴凯陈卫
Owner DONGGUAN AMPEREX TECH
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