A power battery fault cell screening structure and method

A power storage battery and screening method technology, applied to structural parts, battery pack parts, battery cover/end cover, etc., can solve problems such as low work efficiency, time-consuming and laborious, and inability to measure single-cell voltage, and achieve simple structure and easy operation The method is simple and the effect of improving the efficiency of anatomical analysis

Active Publication Date: 2021-12-24
ZHEJIANG TIANNENG BATTERY JIANGSU +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a power battery fault cell screening structure and method thereof, which overcomes the defects of the prior art and solves the problem that the busbar of the current battery structure is sealed inside the middle cover by glue. Cutting off the bus bar makes it impossible to measure the voltage of a single cell. Each single cell pole group must be pulled out to find the cause, which is time-consuming and laborious, and the work efficiency is extremely low.

Method used

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  • A power battery fault cell screening structure and method
  • A power battery fault cell screening structure and method
  • A power battery fault cell screening structure and method

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Embodiment 1: as Figure 1 to Figure 3 A power battery fault cell screening structure shown includes a battery 1, the battery 1 includes a middle cover 11, a bottom tank 12, and the inside of the bottom tank 12 is divided into a plurality of identical cells 14 by partitions, each cell There is a pole group inside each grid 14, and two adjacent pole groups are directly connected by a bus bar 3, and the bus bar 3 is sealed and fixed inside the middle cover 11 by glue, and the center of each bus bar 3 is directly above Blind holes 5 are drilled, and self-tapping screws 6 are threaded in each blind hole 5, and bolts 7 are threaded on the top of the positive and negative terminals of the battery 1, and the bolts 7 are respectively connected to the discharge instrument 8 through wires.

[0029] The blind hole 5 passes through the middle cover 11 and the glue layer 15 sequentially from top to bottom, and finally extends to the top surface of the bus bar 3; when the self-tappin...

Embodiment 2

[0041] 1. Choose a 12V, 20Ah defective battery;

[0042] 2. The discharge current is set to 40A, and the discharge time is set to 10min;

[0043] 3. Compared with the display of the discharge meter, record the voltage of each single cell:

[0044] V1 V2 V3 V4 V5 V6 1.77 1.96 1.97 1.89 1.93 1.95

[0045] From this, it can be judged that there is an abnormality in the first cell, and a mark is made on the battery cell. When dissecting and analyzing, just pull out the pole group in the first single cell and analyze.

Embodiment 3

[0047] 1. Choose a 12V, 32Ah defective battery;

[0048] 2. The discharge current is set to 62A, and the discharge time is set to 10 minutes;

[0049] 3. Compared with the display of the discharge meter, record the voltage of each single cell:

[0050] V1 V2 V3 V4 V5 V6 1.87 1.91 1.92 1.32 1.94 1.89

[0051]From this, it can be judged that there is an abnormality in the fourth cell, and a mark is made on the battery cell. When dissecting and analyzing, just pull out the pole group in the fourth cell and analyze.

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Abstract

The invention discloses a structure and method for screening faulty cells of a power storage battery. There is one pole group, and two adjacent pole groups are directly connected by a busbar. The busbar is sealed and fixed inside the middle cover by glue, and a blind hole is drilled directly above the center of each busbar. Self-tapping screws are threaded in each of the blind holes, and bolts are threaded on the top of the positive and negative terminals of the storage battery, and the bolts are respectively connected to the discharge instrument through wires. It can be seen from the present invention that the structure is simple, the operation is convenient and quick, and the voltage in each single cell is detected by the discharge instrument, and the low voltage of the single cell can be detected quickly, without the need to pull out the pole group of each single cell to find the cause , which greatly improves the efficiency of anatomical analysis and provides powerful help for analyzing faults.

Description

technical field [0001] The invention relates to the field of battery fault detection, in particular to a power battery fault cell screening structure and a method thereof. Background technique [0002] Bus bar, which connects each plate group in series, is equivalent to the internal wire of the battery. In order to improve the volume specific energy and weight specific energy of the battery, the power battery at this stage improves the design of the bridge connection structure to a bus bar direct connection structure. The lead consumption (ie weight) of casting and welding, and the battery basically eliminates the problem of bridge breakage in the past. [0003] However, the new structure brings new technical problems. For example, for defective batteries produced during the manufacturing process, the middle cover needs to be sawed for anatomical analysis. The original battery structure can retain the bus bars of each cell after sawing the middle cover. The voltmeter measu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B07C5/344B07C5/02H01M50/507H01M50/147
CPCB07C5/344B07C5/02Y02E60/10
Inventor 李军孙磊胡国柱李明钧
Owner ZHEJIANG TIANNENG BATTERY JIANGSU
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