Battery module capable of delaying heat diffusion and battery pack

A battery module and thermal diffusion technology, applied in the direction of battery pack parts, secondary batteries, battery cover/end cover, etc., can solve the problem of no eruption direction, insufficient effectiveness of protective measures, and inability to effectively prevent batteries, etc. problem, to achieve the effect of delaying the time of open flames, reducing the degree of violence, and delaying thermal runaway

Pending Publication Date: 2022-02-01
FARASIS TECH (GANZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology has the following defects: 1. The protective measures on the battery module are not effective enough to effectively delay the time of thermal diffusion after the thermal runaway of the battery pack occurs; 2. Thermal runaway occurs in a single cell of the battery pack At this time, since the sealing strength of each position of the edge sealing of the pouch battery is the same, any position of the tab edge sealing

Method used

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  • Battery module capable of delaying heat diffusion and battery pack
  • Battery module capable of delaying heat diffusion and battery pack
  • Battery module capable of delaying heat diffusion and battery pack

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] like Figure 1 to Figure 10 As shown, a battery module for delaying thermal diffusion in this embodiment includes multiple sets of stacked battery cells 340, a module upper cover 100, and a fireproof heat insulation mat 200. The top edge sealing 320 of multiple sets of battery cells 340 is A fireproof heat insulation pad 200 is provided between the module upper covers 100, and a plurality of thermal diffusion openings are provided on the fireproof thermal insulation pad 200, and a device for opening or closing the thermal diffusion openings is connected to the thermal diffusion openings. Door-shaped structure 210; the upper cover 100 of the module is provided with a plurality of thermal diffusion holes 110, and the plurality of thermal diffusion holes 110 are arranged in one-to-one correspondence with a plurality of thermal diffusion openings; A closed thermal diffusion channel is formed between the thermal pads 200, and the thermal diffusion channel corresponds to at l...

Embodiment approach 1

[0058] Embodiment 1, each battery cell has only one battery cell, and the shoulder 340a where the top edge sealing 320 of each battery cell 340 is located can be sealed and connected to the fireproof heat insulation pad 200 through the sealing strip 700, so that each battery cell Each cell 340 corresponds to a thermal diffusion channel, which is beneficial to delaying the thermal diffusion time of a single battery cell, and finally delaying the thermal runaway time of the entire battery module.

Embodiment approach 2

[0059] Embodiment 2, such as Figure 9 and Figure 10 As shown, each group of cells contains two cells, and sealing strips 700 can be provided on the shoulders on the left and right sides of the top edge of each group of cells, that is, between the top edges of two adjacent groups of cells. One sealing rubber strip 700, one sealing rubber strip 700 is provided for every two batteries, which is convenient for production under the premise of delaying the time of thermal runaway.

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Abstract

The invention relates to a battery module capable of delaying heat diffusion and a battery pack. The battery module comprises multiple groups of stacked battery cells, a module upper cover and a fireproof heat insulation pad, wherein the fireproof heat insulation pad is arranged between top sealing edges of the multiple groups of battery cells and the module upper cover, multiple heat diffusion openings are formed in the fireproof heat insulation pad, and the heat diffusion opening is connected with a door-shaped structure for opening or closing the heat diffusion opening; multiple heat diffusion holes are formed in the module upper cover, and the multiple heat diffusion holes and the multiple heat diffusion openings are arranged in a one-to-one correspondence manner; and a closed heat diffusion channel is formed between each group of battery cells and the fireproof heat insulation pad through the sealing structure, and the heat diffusion channel at least corresponds to one heat diffusion opening. When a single battery cell is subjected to thermal runaway, the edge sealing position where thermal runaway eruption is not expected to occur is pressed by the fireproof heat insulation pad to prevent the non-target eruption position from being broken and erupted and prevent high-temperature gas or flame from rushing the door-shaped structure to erupt, so that the influence on other groups of battery cells can be reduced, the thermal runaway of other groups of battery cells is delayed, and even other battery cells are not triggered to generate thermal runaway.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a battery module and a battery pack for delaying thermal diffusion. Background technique [0002] As the main source of power for new energy electric vehicles, power batteries are more and more popular in the market for safe, reliable, and high-energy-density battery modules. However, during the use of the power battery, the thermal runaway of the battery caused by overcharging, acupuncture, heating and abuse, etc., always endangers the lives and property of passengers. , How to delay the thermal diffusion time after the thermal runaway of the power battery occurs has become an urgent problem for manufacturers to solve. [0003] At present, most of the markets on the market use mica sheets or spray fireproof coatings between the internal modules of the battery pack and between the modules and the upper cover of the box to delay the time when the upper cover of the battery pack...

Claims

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Application Information

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IPC IPC(8): H01M50/204H01M10/613H01M10/625H01M10/6551H01M10/6562H01M50/24H01M50/249H01M50/271H01M50/296H01M50/298
CPCH01M50/204H01M50/249H01M50/271H01M50/296H01M50/298H01M50/24H01M10/613H01M10/625H01M10/6551H01M10/6562Y02E60/10
Inventor 肖士贵宋韩龙顾江娜郭元钟崇霖蔡海锋陈剑伟
Owner FARASIS TECH (GANZHOU) CO LTD
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