Unit module and battery pack

A unit module and battery pack technology, applied in secondary batteries, battery pack components, circuits, etc., can solve the indeterminate position of the thermal runaway of soft pack cells, unfavorable thermal runaway protection measures for battery packs, and hidden dangers of battery pack safety, etc. To reduce the risk of thermal runaway, alleviate heat concentration, and achieve the effect of reliable heat dissipation

Pending Publication Date: 2022-01-14
EVERGRANDE NEW ENERGY TECH SHENZHEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the embodiments of the present invention is to provide a unit module to solve the problem in the prior art that the thermal runaway position of the soft-packed battery cell is uncertain, which is not conducive to the thermal runaway protection measures of the battery pack, resulting in a relatively large safety hazard in the battery pack technical problem

Method used

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  • Unit module and battery pack
  • Unit module and battery pack
  • Unit module and battery pack

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] see figure 1 , figure 2 , the embodiment of the present invention provides a unit module 100, including at least one pouch cell 110 and a housing assembly 120, a housing cavity 121 for accommodating each pouch cell 110 is formed in the housing assembly 120, and the housing assembly 120 is provided with an exhaust hole 122 on one side of the pouch cell 110 in the height direction z to communicate the accommodating cavity 121 to the outside.

[0055] It should be noted here that the housing assembly 120 is a hollow structure, and its interior encloses and forms a receiving cavity 121 , and one or more pouch cells 110 can be accommodated in the receiving cavity 121 . When the accommodation cavity 121 accommodates a plurality of pouch cells 110 , each pouch cell 110 can be stacked along the thickness direction y of the pouch cell 110 , and establish a parallel, series or hybrid power connection relationship.

[0056] Based on this, the casing assembly 120 can protect the...

Embodiment 2

[0096] The difference between this embodiment and Embodiment 1 is:

[0097] Please refer to figure 2 , image 3 , in this embodiment, a thin-walled structure (not shown in the figure) that can be broken through is provided in the vent hole 131 .

[0098] By adopting the above scheme, when the pouch cell 110 of the unit module 100 does not experience thermal runaway, the thin-walled structure arranged in the vent hole 131 can be isolated to a certain extent between each pouch cell 110 and the exhaust hole 122 time, so as to form a certain protective and protective effect on each pouch cell 110; and when the pouch cell 110 of the unit module 100 is thermally out of control and reaches a certain pressure, the thin-walled structure arranged in the vent hole 131 can be Break through, and allow the gas and heat exhausted by the pouch cell 110 of thermal runaway to be discharged to the exhaust hole 122 along it. Therefore, by adopting the above scheme, the protection effect of th...

Embodiment 3

[0100] The difference between this embodiment and Embodiment 1 is:

[0101] Please refer to figure 2 , image 3 , in this embodiment, the vent hole 131 is provided with a window structure (not shown in the figure) hinged to the edge of the vent hole 131 .

[0102] By adopting the above scheme, when the pouch cell 110 of the unit module 100 does not experience thermal runaway, the window structure provided in the vent hole 131 can cover the vent hole 131 and be isolated from each pouch cell to a certain extent. 110 and the exhaust hole 122, so as to form a certain protection and protection effect on each pouch cell 110; and when the pouch cell 110 of the unit module 100 undergoes thermal runaway and reaches a certain air pressure, the pouch of the thermal runaway The gas and heat discharged from the battery cell 110 can rush toward the window structure and make the window structure rotate, and then be discharged to the exhaust hole 122 . Therefore, by adopting the above sch...

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Abstract

The invention relates to the field of batteries, and provides a unit module and a battery pack. Each unit module comprises at least one soft package battery cell and a shell assembly, an accommodating cavity for accommodating each soft package battery cell is formed in the shell assembly, and an exhaust hole for communicating the accommodating cavity to the outside is formed in one side, in the height direction of the soft package battery cell, of the shell assembly. Based on the structure, a unit module which is regularized, modularized, independent, better in strength and better in rigidity can be formed. No matter the position where thermal runaway happens to the soft package battery cell in the shell assembly is located at the tab, the edge sealing position or other positions of the soft package battery cell, heat and gas discharged by the soft package battery cell with thermal runaway are directionally discharged out of the unit module along the exhaust holes. Therefore, the battery pack can take thermal runaway protection measures based on directional exhaust path pre-design, the risk / speed of thermal runaway spreading to other unit modules can be reduced when a certain unit module is in thermal runaway, and the safety performance of the battery pack can be guaranteed and improved.

Description

technical field [0001] The invention belongs to the technical field of batteries, in particular to a unit module and a battery pack. Background technique [0002] Thermal runaway protection is critical for battery packs. However, for a battery pack composed of several soft-packed cells, the thermal runaway location of the soft-packed cells is uncertain, and may be at the tab, edge seal or other locations. Therefore, it is not conducive to the thermal runaway protection measures for the battery pack. , the heat and gas discharged by the pouch cells that have thermal runaway are easy to spread and affect other pouch cells, resulting in a greater safety hazard for the battery pack. Contents of the invention [0003] The purpose of the embodiments of the present invention is to provide a unit module to solve the problem in the prior art that the thermal runaway position of the soft-packed battery cell is uncertain, which is not conducive to the thermal runaway protection meas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/211H01M10/613H01M10/6551H01M10/6554H01M10/6556H01M10/6562H01M10/6568H01M50/258H01M50/262H01M50/289
CPCH01M50/211H01M50/258H01M50/262H01M50/289H01M10/613H01M10/6551H01M10/6562H01M10/6554H01M10/6556H01M10/6568Y02E60/10
Inventor 李磊吴斌李军李桥
Owner EVERGRANDE NEW ENERGY TECH SHENZHEN CO LTD
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