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Internally-arranged protection device type lithium battery

A protection device, lithium battery technology, applied in the direction of lithium battery, secondary battery, battery cover/end cover, etc., can solve problems such as reducing the reliability of fuse connection, achieve enhanced mechanical reliability, easy promotion and realization, and improved fixing effect Effect

Active Publication Date: 2014-03-12
EVE ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, with the built-in safety device disclosed in the above-mentioned patent, when the battery is subjected to high-intensity vibration or mechanical shock, since the pole group is not fixed in the battery, the fuse will be stressed by the pole group, thereby reducing the reliability of the fuse connection

Method used

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  • Internally-arranged protection device type lithium battery
  • Internally-arranged protection device type lithium battery

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Embodiment Construction

[0032] The present invention will be further described in detail below with reference to the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0033] Such as figure 1 As shown, a lithium battery with a built-in protection device includes a battery cover 1, a battery case 2, and a winding core 3 located inside the battery case 2. The winding core 3 is formed by stacking and winding a negative electrode sheet, a separator, and a positive electrode sheet. become. Between the battery cover plate 1 and the winding core 3, a fixing ring 4, an insulating cover sheet 5 and an insulating gasket 6 are arranged in sequence. The insulating gasket 6 is tightly pressed against the winding core 3, and the fixing ring 4 is welded on the inner wall of the battery case 2. .

[0034] The lithium battery also includes a first negative current collector 7 , a second negative current collector 8 and a fuse 9 connected between the fi...

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Abstract

The invention relates to an internally-arranged protection device type lithium battery. The internally-arranged protection device type lithium battery comprises a battery cover plate, a battery shell and a coiling core located in the battery shell, wherein the coiling core is formed by overlapping and winding a negative pole piece, a membrane and a positive pole piece; a fixed ring, an insulating cover plate and an insulating gasket are sequentially arranged between the battery cover plate and the coiling core in a close fitting manner; the insulating gasket is used for tightly pressing the coiling core; the fixed ring is welded on the inner wall of the battery shell; the lithium battery further comprises a first negative pole current collector, a second negative pole current collector and a fuse connected between the first negative pole current collector and the second negative pole current collector; one end of the first negative pole current collector is located on the insulating gasket and the other end of the first negative pole current collector extends to an opening of the battery shell and is tightly pressed on the inner wall of the battery shell by the battery cover plate; one end of the second negative pole current collector is located on the insulating gasket and the other end of the second negative pole current collector extends towards the bottom of the battery shell and is welded with the negative pole piece. According to the internally-arranged protection device type lithium battery, an internally-arranged protection device with a simple structure is arranged so that the short-circuit protection capability and the shake-proof capability of the lithium battery are improved.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a lithium battery that can realize self-protection through a built-in protection device under short-circuit conditions. Background technique [0002] In recent years, with the frequent occurrence of safety accidents, government departments have continuously increased the supervision of safety production. In the field of battery manufacturing, especially for batteries used in areas with relatively large safety hazards, such as batteries used in production equipment such as gas and coal mines, national policies mandate that the quality of batteries must meet the corresponding explosion-proof certification standards. [0003] At present, those skilled in the art often use an external protection device to perform explosion-proof treatment on the battery. For example, a fuse is provided outside the battery, and the fuse is connected between the electrode terminal and the el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/34H01M50/242H01M50/583H01M50/59
CPCH01M4/75H01M10/052H01M10/0587H01M50/147H01M50/581Y02E60/10
Inventor 曹浪袁中直刘金成
Owner EVE ENERGY CO LTD
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