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Structure for preventing short circuit outside battery and top cover

A battery and top cover technology, which is applied in the direction of battery cover/end cover, battery box/coat, circuit, etc., can solve the problems of reduced battery safety performance, reduced lithium battery life, and large resistance block quality, so as to improve lightweight Level, prevent poor contact, low cost effect

Active Publication Date: 2020-02-11
JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, during the use of lithium batteries, excessive current in the lithium battery can easily lead to damage to the lithium battery, and continuous charging with excessive current can easily cause the life of the lithium battery to be reduced, and more seriously, it will cause the lithium battery to explode. Dangerous accidents, at present, the positive pole is electrically connected to the top cover sheet through a resistance block, wherein the resistance of the resistance block is at the milliohm level
The inventor found that there are certain risks in this structure: first, the mass of the resistance block is relatively large, and the production cost is relatively high; The current between the columns reduces the safety performance of the battery cell

Method used

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  • Structure for preventing short circuit outside battery and top cover
  • Structure for preventing short circuit outside battery and top cover
  • Structure for preventing short circuit outside battery and top cover

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as Figure 1~2As shown, a structure for preventing external short circuit of the battery includes an insulating plate 1 and a conductive part 2, the conductive part 2 is arranged on the top surface and the bottom surface of the insulating plate 1, the conductive part 2 is connected with a fuse 3, and the insulating plate 1 is provided with a conductive hole 10, the fuse 3 is connected to the welding ring 8 or the top cover 5 of the battery through the conductive hole 10. Because the existing structure is that the resistance block is arranged between the positive pole 8 and the top cover 5, the positive pole is electrically connected with the top cover 5 through the resistance block, wherein the resistance of the resistance block is in the order of milliohms, but the resistance of the resistance block is The mass is large, which increases the overall weight of the battery case, and when the external parts and the case cause a short circuit, that is, the external sho...

Embodiment 2

[0039] The difference from Embodiment 1 is that in this embodiment, the conductive part 2 is arranged on the top or bottom surface of the insulating plate 1; It is electrically connected to the conductive layer through the fuse line 3 and the conductive hole 10 . It is arranged on the top or bottom surface of the insulating plate 1, which can ensure the contact area between the conductive part 2 and the positive pole 8 and the top cover 5, and can also reduce the cost of the conductive layer 4, thereby reducing the production cost of the battery; when the volume of the battery is large At the same time, the conductor 102 can be completely set on the inner wall of the hole body 101 by enlarging the diameter of the hole body 101 to adjust the flow capacity of the conduction hole 10. At the same time, according to the actual hole body 101, the conductor 102 can be accommodated in The hole body 101 is embedded with a conductive layer on the bottom surface of the insulating plate 1...

Embodiment 3

[0042] Such as image 3 As shown, a top cover includes a top cover 5, a plastic part 6, a welding ring 7, a positive pole 8 and a structure for preventing external short circuit of the battery as described above, a structure is set between the positive pole 8 and the top cover 5, and the welding ring 7 Welded to the positive pole 8, the plastic part 6 is glued to the positive pole 8, the bottom of the top cover 5 is provided with a lower plastic 9, an explosion-proof valve 40 is provided between the top cover 5 and the lower plastic 9, and a protection valve 40 is provided above the explosion-proof valve 40. A sealing ring 30 is sleeved between the membrane 20 , the positive pole 8 and the top cover 5 .

[0043] It should be noted that: the plastic part 6 fastens the positive pole 8 to the top cover 5, preventing the positive pole 8 from loosening and causing potential safety hazards, ensuring the reliability of the top cover 5, and also protecting the top cover 5; welding Th...

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Abstract

The invention belongs to the technical field of battery production, and particularly relates to a structure for preventing a short circuit outside a battery. The structure includes an insulating plate(1) and a conductive part (2). The conductive part (2) is arranged on the top surface and / or the bottom surface of the insulating plate (1). The conductive part (2) is connected with a fuse line (3).The insulating plate (1) is provided with a conductive hole (10). The fuse line (3) is connected with the welding ring (7) or the top cover (5)of the battery through the conductive hole (10). According to the invention, the structure can automatically cut off the current between a pole and the top cover, and avoids large current of external parts and a casing body; the safety performance of a battery core is improved, and at the same time the structure has the advantages of small size, light weight, and mature production process; and the manufacturing cost is reduced. In addition, the invention further discloses the top cover.

Description

technical field [0001] The invention belongs to the technical field of battery production, and in particular relates to a structure and a top cover for preventing external short circuit of the battery. Background technique [0002] Nowadays, all countries are vigorously developing green and high-efficiency secondary batteries. As a new type of secondary battery, lithium-ion batteries have the advantages of high energy density and power density, high working voltage, light weight, small size, long cycle life, good safety, and environmental protection. At the same time, with the development of modern society With the development and the enhancement of people's awareness of environmental protection, more and more devices choose to use lithium batteries as power sources, such as mobile phones, notebook computers, power tools and electric vehicles, etc., which provides a broad space for the application and development of lithium batteries. [0003] However, during the use of lit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/04H01M2/34H01M2/20H01M10/052
CPCH01M10/052H01M50/166H01M50/147H01M50/148H01M50/50H01M50/581Y02E60/10
Inventor 姜斌邹武元李勇军王程
Owner JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD