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Soft package battery and battery module

A soft-pack battery and coating technology, which is applied to battery pack components, secondary batteries, non-aqueous electrolyte batteries, etc., can solve problems such as poor heat exchange and uneven side ends, and achieve high heat dissipation efficiency and low operating temperature. Low, high safety effect

Pending Publication Date: 2022-03-08
EVERGRANDE NEW ENERGY TECH SHENZHEN CO LTD
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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 pouch battery, aiming to solve the problem of uneven side ends of the existing pouch battery and poor heat exchange caused by the uneven side ends

Method used

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  • Soft package battery and battery module
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  • Soft package battery and battery module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Please refer to Figure 1 to Figure 3 , in this embodiment, the bare electric core group 10 includes at least two bare electric cores, each bare electric core is stacked, and the side end of at least one bare electric core is in the opposite position to the side ends of the remaining bare electric cores. The step structure 30 is formed in an even state. It can be understood that, according to the difference in size specification between the bare cells of the bare cell group 10, for example, the length and / or width are different. After each bare cell is stacked, the side end of the stacked bare cell forms a stepped structure 30 for the side sealing edge 22 to be accommodated and placed. For example, if figure 1 As shown, the number of bare cells in the bare cell group 10 is two. After the two bare cells are laminated, one of the side ends is flush, and the other three side ends form a stepped structure 30. This situation is suitable for Use an aluminum-plastic film 20...

Embodiment 2

[0046] Please refer to Figure 4 , in one embodiment, the length and width of each bare electric core of the bare electric core group 10 are the same, and a spacer 40 is provided at least one side end of one of the bare electric cores, and the spacer 40 and the corresponding bare electric core The combination of the side ends forms the stepped structure 30. It can be understood that the length of the spacer 40 is the same as the length of the side end of the bare cell, and after being encapsulated by the aluminum-plastic film 20 , the spacer 40 and the side end of the corresponding bare cell form a stepped structure 30 . Moreover, according to actual needs, spacers 40 are provided on each side end of the bare cell assembly 10 .

[0047] In this embodiment, the spacer 40 is a heat conduction spacer. By adopting the above technical solution, the heat exchange efficiency between the bare cell group 10 and the external heat exchanger is increased by using the heat conduction pad...

Embodiment 3

[0049] Please refer to Figure 5 , in this embodiment, the number of bare cells in the bare cell group 10 is one, the bare cell includes a plurality of stacked electric core sub-parts 11, and the side end of at least one of the electric core sub-parts 11 part and the side ends of the rest of the electric core sub-parts 11 are in a non-flat state to form a stepped structure 30 . It can be understood that, after stacking each cell sub-section 11 , the side ends thereof form a stepped structure 30 , that is, the side ends of the bare cell group 10 itself have a stepped structure 30 .

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Abstract

The invention relates to the technical field of batteries, and provides a soft package battery and a battery module, the soft package battery comprises a naked battery cell group and an aluminum plastic film covering the naked battery cell group, and the aluminum plastic film is packaged to form the soft package battery. The side end part of the naked battery cell group is provided with a step structure, and the side sealing edge of the aluminum plastic film is folded and then stored on the step structure. According to the soft package battery, the step structure is formed at the side end part of the naked battery cell group, and after the battery cells are packaged by the aluminum plastic film, the side sealing edges of the naked battery cell group are bent and then are stored on the step structure, so that the side end part of the naked battery cell group is not interfered by the side sealing edges and is smoother; no interference of the side sealing edge exists between the side end part and the external heat exchanger, so that the contact area between the side end part and the external heat exchanger is larger, the heat exchange effect is better, the heat dissipation efficiency of the soft package battery is higher, and the working temperature is lower.

Description

technical field [0001] The invention relates to the technical field of batteries, and in particular provides a soft pack battery and a battery module. Background technique [0002] Lithium-ion batteries have attracted much attention because of their high energy density and good safety performance. As their applications in 3C electronic products become more and more mature, lithium-ion batteries are gradually transitioning to the field of new energy vehicles. [0003] The outer packaging film of the traditional pouch battery is generally aluminum-plastic film. The bare cell is packaged by two layers of aluminum-plastic film and then hot-melt sealed. Generally, there are two ways of three-side sealing and four-side sealing. After heat sealing, close to the side end of the bare battery by bending, so that the side end of the pouch battery is not flat, and in the subsequent packaging and assembly process, the side end of the pouch battery is prone to bulge At the same time, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/105H01M10/0525H01M10/058
CPCH01M10/058H01M10/0525Y02E60/10Y02P70/50
Inventor 邓智勇
Owner EVERGRANDE NEW ENERGY TECH SHENZHEN CO LTD