Aerogel structure and battery cell module

Abstract

The utility model discloses an aerogel structure and a battery cell module, and belongs to the technical field of batteries, and the aerogel structure comprises a frame member, a first electrode, a second electrode, a third electrode and a fourth electrode, the framework component is arranged in the through opening structure and assembled on the frame component, and the framework component forms a honeycomb structure; and an aerogel unit. The framework component with the cavity is arranged, the cavity is filled with air, a part of aerogel is replaced based on the heat insulation effect of the air, under the condition that the low heat conductivity of the whole structure is maintained, the use of the aerogel is reduced so as to reduce the cost, meanwhile, the honeycomb structure has high stability, efficient mechanical performance and excellent load bearing capacity, and the honeycomb structure is suitable for large-scale popularization and application. Normal stress can be borne, and the overall strength of the battery cell module can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and particularly relates to an aerogel structure and a battery cell module. Background Art

[0002] With the further expansion of the electric vehicle market and the continuous improvement of the requirements for cruising range, the battery capacity is continuously increased, which also means that the thermal hazard generated after the thermal runaway of the battery cells is higher. Once thermal diffusion occurs between the battery cells, it often brings serious vehicle fires and even threatens the lives of passengers.

[0003] An effective method for dealing with thermal diffusion after the out-of-control of battery cells is to add aerogel between the battery cells. By using the characteristic of the low thermal conductivity of aerogel, the occurrence of thermal diffusion is prevented. However, the price of aerogel is expensive, and excessive use of aerogel will increase the cost of enterprises. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an aerogel structure and a battery cell module to solve the problem of the too high use cost of the existing aerogel proposed in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: An aerogel structure, comprising:

[0006] A frame member, in which a through-hole structure extending in a first direction is formed;

[0007] A bone structure member, disposed in the through-hole structure and assembled on the frame member, and the bone structure member is configured as a honeycomb structure;

[0008] An aerogel unit, which is disposed on at least one side of the bone structure member in the first direction and is disposed along the cross-section of the through-hole structure, and the aerogel unit includes at least one gel layer.

[0009] By providing a bone structure member with a cavity filled with air, the heat insulation effect of air is used to replace a part of aerogel. While maintaining the low thermal conductivity of the whole structure, the use of aerogel is reduced to lower the cost. At the same time, the honeycomb structure has high stability, high mechanical properties and excellent load-bearing capacity, can withstand normal stress, and can improve the overall strength of the battery cell module.

[0010] Further, the aerogel unit further includes a fireproof layer, and the at least one gel layer is disposed on one side or both sides of the fireproof layer in the first direction.

[0011] Further, the fireproof layer has a honeycomb briquette structure.

[0012] Based on the setting of the fireproof layer, on the one hand, based on the cavity structure within its honeycomb briquette structure, a part of the aerogel is replaced by the heat insulation effect of air. While maintaining the low thermal conductivity of the entire structure, the use of aerogel is reduced to lower costs. On the other hand, it can play a fireproof role. At the same time, when the battery cell is thermally out of control, a large amount of heat will be dissipated from the battery cell. Under high-temperature conditions, the above-mentioned fireproof layer 23 gradually heats up and begins to expand, increasing the buffering force, and can prevent the out-of-control battery cell from squeezing the surrounding battery cells.

[0013] Furthermore, there are two layers of the gel layer, which are respectively arranged on both sides of the fireproof layer in the first direction.

[0014] Furthermore, there are two aerogel units, which are respectively arranged on both sides of the bone structure member in the first direction.

[0015] Furthermore, the frame member is a loop-shaped frame.

[0016] Furthermore, the material of the bone structure member is one of metal, rigid plastic fiber or glass fiber.

[0017] On the other hand, the present application provides a battery cell module, which is formed by stacking a plurality of battery cells, and an aerogel structure is provided between adjacent battery cells. The aerogel structure includes:

[0018] A frame member, within which a through-hole structure extending in the first direction is formed;

[0019] A bone structure member, which is arranged in the through-hole structure and assembled on the frame member, and the bone structure member is configured as a honeycomb structure;

[0020] An aerogel unit, which is arranged on at least one side of the bone structure member in the first direction and is arranged along the cross-section of the through-hole structure. The aerogel unit includes at least one layer of gel layer.

[0021] Furthermore, the frame member extends along the edge of the battery cell.

[0022] Furthermore, the frame member is a loop-shaped frame. Description of the Drawings

[0023] Figure 1 It is a schematic diagram of an existing battery cell module;

[0024] Figure 2 It is a schematic diagram of the overall aerogel structure;

[0025] Figure 3 It is a schematic diagram of the bone structure member;

[0026] Figure 4 It is a perspective schematic diagram of the bone structure member;

[0027] Figure 5 It is a schematic diagram of an aerogel unit.

[0028] In the figure:

[0029] 1. Foam spacer; 2. Aerogel; 3. Battery cell

[0030] 201. Frame member; 202. Aerogel unit; 203. Fireproof layer; 204. Gel layer; 205. Framework member. Specific implementation mode

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Refer to Figure 1 , which is a schematic diagram of the structure of a battery cell module. The battery cell module is formed by stacking multiple battery cells 3 in a single direction. To ensure the safety of the battery cell module, that is, after a single battery cell 3 undergoes thermal runaway, to prevent thermal diffusion between the battery cells 3, a foam spacer 1 and an aerogel 2 are provided between adjacent battery cells 3. Utilizing the low thermal conductivity characteristic of the aerogel 2 to prevent thermal diffusion from occurring. However, arranging the battery cells 3 completely on the contact surfaces between adjacent battery cells 3 will make the price of the battery cell module too expensive. To solve this problem, the present application proposes an aerogel structure, and this aerogel structure is arranged between adjacent battery cells.

[0033] Refer to Figure 2 , the above-mentioned aerogel structure includes a frame member 201, a framework member, and an aerogel unit 202. Among them, the frame member 201 is configured as a plate-like member, and a through-hole structure extending in a first direction (not shown) is formed inside it. This first direction is configured as the thickness direction of the frame member 201. In some embodiments, the above-mentioned frame member 201 is arranged along the edge of the end face of the battery cell, and the through-hole structure is configured as a rectangular structure. That is, at this time, the above-mentioned frame member 201 is configured as a rectangular frame. Continuing to refer to Figure 2 , the above-mentioned framework member and aerogel unit 202 are arranged in the through-hole structure and assembled on the frame member 201. That is, the above-mentioned frame member 201 is configured as an installation carrier for the framework structure and the aerogel unit 202.

[0034] Refer to Figure 3, In some embodiments, the material of the above-mentioned bone structure member can be determined according to the actual situation. Exemplarily, it can be metal, hard plastic fiber, glass fiber, etc. And the above-mentioned bone structure member is configured as a honeycomb structure, and the honeycomb skeleton has air cavities filled with air. Based on the heat insulation effect of air, a part of the aerogel is replaced. While maintaining the low thermal conductivity of the whole structure, the use of aerogel is reduced to lower the cost. At the same time, the honeycomb structure has high stability, high mechanical properties and excellent load-bearing capacity, can withstand normal stress, and can improve the overall strength of the battery cell module.

[0035] Referring to Figure 4 and Figure 5 , the above-mentioned aerogel unit 202 is arranged on both sides of the bone structure member in the first direction, and includes a fireproof layer 203 and a gel layer 204 arranged on at least one side of the fireproof layer 203 in the first direction. The gel layer 204 is made of aerogel material, and both the gel layer 204 and the fireproof layer 203 are arranged along the cross-section of the through-hole structure. Further, the above-mentioned fireproof layer 203 is configured as a honeycomb coal fireproof layer 203, and its material is a finishing liquid prepared by coating a flame retardant on a fiber fabric mesh structure; the fireproof function depends on forming a porous foam coke layer on the material surface. The honeycomb coal fireproof layer 203 is a multiphase system containing solids, liquids and gaseous products. The flame retardant property of the carbon layer is mainly reflected in: making heat difficult to penetrate the condensed phase, preventing oxygen from entering the combustion area, preventing the gaseous or liquid products generated by degradation from overflowing the material surface. In some examples, the formation process of the above-mentioned coke layer is as follows: at about 150 °C, the acid source generates an acid that can esterify polyols and can act as a dehydrating agent; at a slightly higher temperature, the acid reacts with the carbon source in an esterification reaction, and the amine group in the system acts as a catalyst for the esterification reaction to accelerate the reaction; the system melts before and during the esterification reaction, and the non-combustible gas generated during the reaction causes the system in the molten state to expand and foam. At the same time, the polyols and esters dehydrate and carbonize to form inorganic substances and carbon residues, and the system further foams; when the reaction is nearly complete, the system gels and solidifies, and finally forms a porous foam carbon layer; based on the setting of the fireproof layer 203, on the one hand, based on the cavity structure in its honeycomb coal structure, a part of the aerogel is replaced by the heat insulation effect of air. While maintaining the low thermal conductivity of the whole structure, the use of aerogel is reduced to lower the cost. On the other hand, it can play a fireproof role. At the same time, when the battery cell is out of control thermally, the battery cell will emit a large amount of heat. Under high temperature conditions, the above-mentioned fireproof layer 23 gradually heats up and begins to expand, increasing the buffer force, and can prevent the out-of-control battery cell from squeezing the surrounding battery cells.

[0036] The present application also provides a battery cell module, which is formed by stacking a plurality of battery cells, and an aerogel structure is provided between adjacent battery cells. The aerogel structure includes:

[0037] The border member 201 has a through-opening structure formed therein that extends in a first direction;

[0038] The bone structure member is disposed within the through-opening structure and assembled on the border member 201, and the bone structure member is configured as a honeycomb structure;

[0039] The aerogel unit 202 is disposed on at least one side of the bone structure member in the first direction and is disposed along the cross-section of the through-opening structure. The aerogel unit 202 includes at least one gel layer 204.

[0040] In some examples, the border member 201 extends along the edge of the battery cell. In other examples, the border member 201 is a looped frame.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An aerogel structure, characterized in that, Comprising: A border member, within which a through-opening structure extending in a first direction is formed; A framework member, disposed within the through-opening structure and assembled on the border member, the framework member being configured as a honeycomb structure; An aerogel unit, disposed on at least one side of the framework member in the first direction and arranged along the cross-section of the through-opening structure, the aerogel unit including at least one gel layer.

2. The aerogel structure according to claim 1, characterized in that: The aerogel unit further includes a fireproof layer, and the at least one gel layer is disposed on one side or both sides of the fireproof layer in the first direction.

3. The aerogel structure according to claim 2, characterized in that: The fireproof layer has a honeycomb coal-like structure.

4. The aerogel structure according to claim 2, wherein: Two gel layers are provided, and are respectively disposed on both sides of the fireproof layer in the first direction.

5. The aerogel structure according to claim 1, wherein: Two aerogel units are provided, and are respectively disposed on both sides of the framework member in the first direction.

6. The aerogel structure according to claim 1, characterized in that: The border member is a loop-shaped frame.

7. Aerogel structure according to claim 1, characterized in that: The material of the framework member is one of metal, rigid plastic fiber, or glass fiber.

8. A battery cell module, characterized in that: The battery cell module is formed by stacking a plurality of battery cells, and an aerogel structure is provided between adjacent battery cells. The aerogel structure includes: A border member, within which a through-opening structure extending in a first direction is formed; A framework member, disposed within the through-opening structure and assembled on the border member, the framework member being configured as a honeycomb structure; An aerogel unit, disposed on at least one side of the framework member in the first direction and arranged along the cross-section of the through-opening structure, the aerogel unit including at least one gel layer.

9. The cell module according to claim 8, wherein: The border member extends along the edge of the battery cell.

10. The battery cell module according to claim 8 or 9, characterized in that: The border member is a loop-shaped frame.

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