High-capacity battery with parallel network and manufacturing method of high-capacity battery

A manufacturing method and high-capacity technology, which are applied in secondary batteries, battery pack components, capacitor current collector combinations, etc., to achieve the effects of improving charge and discharge rate performance, improving heat dissipation and rate performance, and shortening the conduction path

Inactive Publication Date: 2020-07-10
SHANGHAI BINET INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few related products for internal parallel disconnection protection of large-capacity batteries

Method used

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  • High-capacity battery with parallel network and manufacturing method of high-capacity battery
  • High-capacity battery with parallel network and manufacturing method of high-capacity battery
  • High-capacity battery with parallel network and manufacturing method of high-capacity battery

Examples

Experimental program
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Effect test

Embodiment 1

[0090] In the high-capacity battery of the present application, 9 lithium iron phosphate positive electrodes-graphite negative electrode winding cores (diameter 32mm and height 140mm) are used to make a 3.2V135Ah large-capacity battery with the above-mentioned processing method. When one of the winding cores is short-circuited by acupuncture, the connecting strip around the negative pole of the winding core is fused, which prevents thermal runaway of the large-capacity battery. When an external short circuit is made to the large-capacity battery, the negative fuse bus is blown (see Figure 15(1) and 15(2) ), to avoid thermal runaway of the large-capacity battery.

Embodiment 2

[0092] In the high-capacity battery of the present application, 9 nickel-cobalt lithium manganese oxide positive electrodes-graphite negative electrode winding cores (diameter 21mm and height 60mm) are used to make a 3.6V36Ah large-capacity battery with the above-mentioned processing method. When one of the winding cores is short-circuited by acupuncture, the connecting strip around the negative pole of the winding core is fused, which prevents thermal runaway of the large-capacity battery. When an external short circuit is made to the large-capacity battery, the negative fuse bus is blown (see Figure 15(1) and 15(2) ), to avoid thermal runaway of the large-capacity battery.

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Abstract

The invention relates to a high-capacity battery with a parallel network and a manufacturing method of the high-capacity battery, and belongs to the technical field of safety prevention and control ofhigh-capacity lithium batteries. In the battery, the positive electrode ends of roll cores are connected to a positive electrode confluence sheet in parallel in an end surface welding manner; the negative electrode ends of the roll cores are connected to a negative electrode parallel network in parallel in an end surface welding manner; and then, the positive electrode confluence sheet is weldedto a positive electrode cover plate, and the negative electrode parallel network is welded to a negative electrode cover plate through a negative electrode safety confluence sheet to form a high-capacity battery. In the negative electrode parallel network, a connecting sheet between adjacent batteries is provided with an over-current fusing device. An over-current and over-temperature fusing device is arranged on the negative electrode safety confluence sheet. The consistency and the qualification rate of the high-capacity single battery are improved. The internal connection resistance is reduced, and the large-current conductivity and heat transfer speed of the battery are improved. The diversion area is increased, the diversion path is shortened, and the charge-discharge rate performanceand safety performance of the battery are improved. The problems of short circuit and thermal safety of the whole high-capacity battery caused by short circuit of a certain roll core are avoided.

Description

technical field [0001] The application relates to a large-capacity battery with parallel networking and a manufacturing method thereof, belonging to the technical field of safety prevention and control of large-capacity lithium batteries. Background technique [0002] Large-size and high-capacity lithium batteries have complex production and processing techniques, low yield, low degree of production automation, poor battery consistency, and there are problems such as large surface expansion, difficulty in heat dissipation, poor rate performance, short cycle life, and poor safety during use. [0003] In the patent application number CN201620094648.4 (announcement number CN205564864U), the patent name is the parallel network with safety protection function and the large-capacity battery using the parallel network. , when a battery is short-circuited, the parallel network can be disconnected instantaneously, which improves the safety performance of small-capacity batteries in p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0587H01M2/34H01M10/613H01M10/643H01M10/654H01M10/0525H01G11/08H01G11/18H01G11/84H01G11/16
CPCH01G11/08H01G11/16H01G11/18H01G11/84H01M10/0525H01M10/0587H01M10/613H01M10/643H01M10/654H01M50/581H01M50/597Y02E60/10Y02P70/50
Inventor 娄豫皖许祎凡孟祎凡李紫璇
Owner SHANGHAI BINET INFORMATION TECH CO LTD
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