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Lithium-ion battery pack

A technology for lithium-ion battery packs and battery cells, which is applied to battery pack components, primary batteries to battery packs, secondary batteries, etc. Exodus and other issues

Inactive Publication Date: 2010-09-29
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This shortcoming is particularly obvious in the manufacturing process of large power batteries. After injecting electrolyte, large power batteries often need to be placed for more than ten hours or even longer, which greatly affects the production efficiency of lithium-ion batteries.
In addition, this tightly pressed positive and negative electrode sheets make it difficult for the gas generated inside the lithium-ion battery to be discharged during the charging and discharging process, which affects the performance of the lithium-ion battery.

Method used

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  • Lithium-ion battery pack

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] see Figure 5 and Image 6 , the present embodiment provides a lithium-ion battery pack 10, which includes a plurality of lithium-ion battery cells 100 connected in series. Each lithium-ion battery cell 100 may further include a positive terminal 12 and a negative terminal 14 . The positive terminal 12 is electrically connected to all the positive tabs 130 a of the lithium-ion battery cell 100 , and the negative terminal 14 is electrically connected to all the negative tabs 130 b of the lithium-ion battery cell 100 . The plurality of lithium-ion battery cells 100 can be stacked on each other, and the positive terminal 12 and the negative terminal 14 of the plurality of lithium-ion battery cells 100 are alternately arranged, so that the positive terminal of one lithium-ion battery 100 12 is close to the negative terminal 14 of another lithium-ion battery cell 100 to facilitate the series connection between the lithium-ion battery cells 100 .

[0050] The lithium-ion b...

Embodiment 2

[0053] see Figure 7 and Figure 8 , the present embodiment provides a lithium-ion battery pack 20 , which includes a plurality of parallel-connected lithium-ion battery cells 100 , a plurality of connecting pieces 16 and a battery fastening device 18 . Each lithium-ion battery cell 100 further includes a positive terminal 12 and a negative terminal 14 . The structure of the lithium ion battery pack 20 in this embodiment 2 is basically the same as that of the lithium ion battery pack 10 in the embodiment 1. Close to each other, the negative terminals 14 of all the lithium ion battery cells 100 are close to each other, so as to facilitate the parallel connection between the lithium ion battery cells 100 .

[0054] The number of the plurality of lithium-ion battery cells 100 is not limited. In this embodiment, three lithium-ion battery cells 100 are connected in parallel to form the lithium-ion battery pack 20 . The total capacity of the lithium-ion battery pack 20 can be inc...

Embodiment 3

[0056] see Figure 9 and Figure 10 , the present embodiment provides a lithium-ion battery pack 30, which includes m units connected in parallel with each other, and each unit includes an equal number of n lithium-ion battery cells 100 connected in series, a plurality of connecting pieces 16 and a battery fastening device 18. Each lithium-ion battery cell 100 further includes a positive terminal 12 and a negative terminal 14 . The structure of the lithium-ion battery pack 30 in this embodiment is basically the same as that of the lithium-ion battery pack 10 in Embodiment 1. The negative pole terminals 14 of the battery cells 100 are close to each other so as to realize the series connection between the lithium ion battery cells 100 inside the unit, and the positive pole terminals 12 between multiple units are close to each other so as to realize the connection between the multiple units. of parallel connection.

[0057] The number of the plurality of lithium-ion battery c...

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Abstract

The invention relates to a lithium-ion battery pack comprising a plurality of lithium-ion batteries which are electrically connected. The lithium-ion batteries comprises positive plates and negative plates which are overlapped and arranged at intervals; each positive plate is provided with at least one first through hole; each negative plate is provided with at least one second through hole; and the first through hole and the second through hole are arranged opposite to each other.

Description

technical field [0001] The invention relates to a lithium ion battery pack. Background technique [0002] Existing lithium-ion batteries can be divided into two types: winding type and laminated type, which include an outer casing, a positive electrode sheet packaged in the outer casing, a negative electrode sheet, a diaphragm, and an electrolyte. The diaphragm is arranged between the positive electrode sheet and the negative electrode sheet. The electrolyte fully infiltrates the positive electrode sheet, the negative electrode sheet and the diaphragm. The positive sheet includes a positive current collector and a positive material layer formed on the surface of the positive current collector. The negative electrode sheet includes a negative electrode current collector and a negative electrode material layer formed on the surface of the negative electrode current collector. [0003] A laminated lithium-ion battery may include positive and negative electrodes stacked in mu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M4/13H01M50/176H01M50/209H01M50/244H01M50/264H01M50/55H01M50/553
CPCY02E60/122H01M6/42H01M2/36H01M10/0525H01M2/1077H01M2/1061H01M10/0566H01M4/742H01M4/13H01M10/058H01M2/30Y02E60/10H01M50/209H01M50/264H01M50/55H01M50/553H01M50/176H01M50/244
Inventor 何向明李建军高剑蒲薇华
Owner TSINGHUA UNIV