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A lithium-ion battery pack

A technology for lithium-ion battery packs and battery module packs, which is applied to battery pack components, secondary batteries, circuits, etc., can solve problems such as poor heat dissipation, explosion and fire, and the battery cannot be decompressed, and achieves light weight and overcurrent capability. Strong, long life effect

Active Publication Date: 2017-07-21
JIADE ENERGY TECH (ZHUHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Another object of the present invention is to design a perforated insulating plate for a large-capacity lithium-ion battery pack to solve the above-mentioned problems of poor heat dissipation and failure to release pressure when the battery is abnormal, resulting in explosion and fire

Method used

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  • A lithium-ion battery pack
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  • A lithium-ion battery pack

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Embodiment Construction

[0039] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0040] figure 1 It is a schematic diagram of the structure of a lithium-ion battery pack. As an embodiment of the present invention, the capacity of the lithium-ion battery pack can be 120V / 300Ah, the discharge current can be 100A continuously, the maximum discharge current is 300A for 60 seconds, and the cell diameter is 18.5mm.

[0041] The lithium-ion battery pack of the present invention includes a plurality of battery module groups 12 connected in series and in parallel, said battery module group is composed of multiple rows of battery cells arranged side by side, and the positive poles and negative poles of each row of battery cells are respectively passed through the above-mentioned The high-current connecting pieces 16 are connected, that is, the positive pole and the negative pole of each row of cells are connected together through a nickel sheet-cop...

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Abstract

A lithium-ion battery pack, including a plurality of battery module packs, the positive poles and the negative poles of the battery module packs are respectively connected through a high-current connecting piece, and the high-current connecting piece includes a straight-shaped copper plate with a row of circular holes. The I-shaped nickel sheet and the I-shaped nickel sheet welded between two adjacent circular holes; the connecting terminals between the battery module groups are provided with a plurality of crimping holes and corresponding connecting wire cores, both of which are welded-pressed Tightly connected by means of connection-welding; the insulation board set at both ends of the positive and negative poles of the battery module group is a bakelite board with a plurality of round holes, and the side facing the positive and negative poles of the battery core is provided with a heat-conducting and explosion-proof insulating sheet; The invention solves the problem of circuit heating during high-current charging and discharging, increases the contact area between the connecting terminal and the wire, and reduces the connection temperature. The insulating plate and the heat-conducting explosion-proof insulating sheet can release the pressure when the battery is working abnormally, thereby preventing the battery from exploding and igniting. The battery pack of the invention has safe and reliable operation and long service life.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a lithium ion battery pack. Background technique [0002] Existing high-current lithium-ion battery packs usually include a plurality of battery module groups composed of battery modules. A plurality of battery cells in each battery module group are connected in parallel through connecting pieces, and battery module groups are connected in parallel through connecting terminals and connecting wires. They are connected in series, and insulating plates are arranged on both sides of the positive and negative poles of the battery cells. The battery modules of the battery pack and the series and parallel connections between the positive and negative electrodes of the battery module group use metal sheets for resistance welding. Welding strength requires a high-power welding machine to output large energy to weld firmly. If the output energy of the welding machine is large, the weldi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/26H01M2/12H01M10/613H01M10/6555H01M50/24H01M50/242H01M50/30H01M50/502H01M50/543
CPCH01M50/383H01M50/30H01M50/531Y02E60/10
Inventor 李永洪曾锦辉罗礼新戴天童李纪洲
Owner JIADE ENERGY TECH (ZHUHAI) CO LTD
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