Battery module and battery pack

A technology for battery modules and cell packs, applied in battery pack components, batteries, secondary batteries, etc., can solve problems such as poor use safety performance, and achieve good use safety performance, longer escape time, and delayed burning speed. Effect

Pending Publication Date: 2021-02-19
SHANGHAI CENAT NEW ENERGY
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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 battery module and a battery pack, aiming to solve the technical problem of poor safety performance of the existing battery module

Method used

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  • Battery module and battery pack
  • Battery module and battery pack
  • Battery module and battery pack

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Please combine Figure 1 to Figure 4As shown, a battery module 10 includes a casing 11 and a cell group 12 disposed in the casing 11. The cell group 12 includes a plurality of cell cells 1211 stacked in sequence, and each cell cell 1211 includes a pole The ear 1214 and the cell main body 1213, the tab 1214 and the cell main body 1213 are sealed and connected to form a tab edge sealing portion 1212, the casing 11 includes a tab bracket 111 for fixing the tab 1214 of each cell unit 1211, and the battery module The group 10 also includes a plurality of fire-proof heat insulators 13 arranged in sequence along the stacking direction of the battery cells 1211, and each fire-proof heat insulator 13 abuts against the lug bracket 111 and the battery cell of the corresponding battery cell 1211 Between the main bodies 1213 and between two adjacent fireproof heat insulators 13 is formed a heat insulation gap 131 for inserting the lug sealing portion 1212 of the corresponding cell u...

Embodiment 2

[0047] Compared with the first embodiment, the present embodiment differs in that the types of the fireproof heat insulator 13 are different.

[0048] In this embodiment, the fireproof heat insulator 13 is a foamed fireproof heat insulator. After the battery module 10 is assembled, foam material is filled in the gap between the tab edge sealing parts 1212 of two adjacent battery cells 1211. After the foaming material is solidified, the above-mentioned fireproof heat insulator 13 is formed to close the gap between the tab edge sealing parts 1212 of two adjacent battery cells 1211. When the battery cells 1211 in the battery module 10 experience thermal runaway And when the high-temperature gas or flame breaks through the lug sealing portion 1212 of the battery cells 1211 , the foam fireproof heat insulator can effectively prevent the high-temperature gas or flame from spreading along the stacking direction of the battery cells 1211 .

Embodiment 3

[0050] Compared with the first embodiment, the present embodiment differs in that the types of the fireproof heat insulator 13 are different.

[0051] In this embodiment, the fireproof heat insulator 13 is a phase change fireproof heat insulator, that is, the fireproof heat insulator 13 is made of a phase change material, such as paraffin, silicone resin or a mixture containing more than 5wt% silicone resin, the battery After the assembly of the module 10 is completed, a phase-change fire-proof heat insulator is placed in the gap between the tab edge sealing parts 1212 of two adjacent battery cells 1211. When the battery cells 1211 in the battery module 10 experience thermal runaway and When the high-temperature gas or flame breaks through the tab edge portion 1212 of the battery cell 1211, the phase-change fireproof heat insulator is heated and gradually changes from a solid state to a vapor state or a liquid state, thereby absorbing heat and effectively delaying the high-temp...

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Abstract

The invention relates to the technical field of batteries, and provides a battery module and a battery pack. The battery module comprises a shell and a battery cell group arranged in the shell, the battery cell group comprises a plurality of battery cell monomers stacked in sequence, each battery cell monomer comprises a tab and a battery cell main body, and the tab and the battery cell main bodyare in sealed connection to form a tab edge sealing part; the shell comprises a tab bracket for fixing a tab of each battery cell monomer, the battery module further comprises a plurality of fireproofheat-insulating bodies which are sequentially arranged along the stacking direction of each battery cell monomer, and each fireproof heat-insulating body is propped between the tab bracket and a battery cell main body of the corresponding battery cell monomer. A heat insulation gap allowing the tab edge sealing part of the corresponding battery cell monomer to be inserted is formed between everytwo adjacent fireproof heat insulation bodies, and the fireproof heat insulation bodies can effectively prevent high-temperature gas or flame from diffusing in the stacking direction of the battery cell monomers, so that the combustion speed in the battery module is reduced. The use safety performance of the battery module is effectively improved.

Description

technical field [0001] The invention relates to the technical field of batteries, and in particular provides a battery module and a battery pack. Background technique [0002] As the market continues to pursue the specific energy of battery modules, the safety issues faced by battery modules are becoming increasingly prominent. The safety issue of battery modules is mainly solved from two dimensions: the first dimension is to improve the safety of the battery cells, making it difficult for the batteries to experience thermal runaway; the second dimension is to prevent thermal runaway of the batteries Next, prevent or slow down the spread of heat to adjacent cells. [0003] For the second dimension, the existing battery modules generally prevent or slow down the spread of heat by setting a heat insulator between the main bodies of two adjacent cells. However, due to the tab seal of the cells The edge is relatively weak. When the thermal runaway of the battery cell occurs, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/625H01M10/62H01M10/647H01M10/658H01M10/659H01M50/474H01M50/30A62C3/16
CPCA62C3/16H01M2200/00H01M2220/00H01M2220/20H01M10/62H01M10/625H01M10/647H01M10/658H01M10/659Y02E60/10
Inventor 王炳琛黄一波杨政杰
Owner SHANGHAI CENAT NEW ENERGY
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