CN216958237U

CN216958237U - Heat insulation structure, battery module and electric equipment

Info

Publication number: CN216958237U
Application number: CN202220700872.9U
Authority: CN
Inventors: 黄红光; 王清泉; 华超
Original assignee: GAC Aion New Energy Automobile Co Ltd
Current assignee: GAC Aion New Energy Automobile Co Ltd
Priority date: 2022-03-28
Filing date: 2022-03-28
Publication date: 2022-07-12
Anticipated expiration: 2032-03-28

Abstract

The application provides a thermal-insulated structure, battery module and consumer relates to power battery's technical field. The heat insulation structure includes: a frame body, the inner edge of which is provided with an installation station; the heat insulation piece is configured at the mounting station, the heat insulation piece is provided with a first plane and a second plane which are oppositely arranged, the first plane and the second plane are exposed at the mounting station, and the first plane and/or the second plane are/is arranged in a concave mode relative to the surface of the frame body. The inner edge of frame main part is provided with the installation station that is used for holding the heat insulating part, and the relative frame main part's of first plane and/or the second plane of heat insulating part surperficial sunken setting for thermal-insulated structure is when thermal-insulated, can leave the space for the battery monomer inflation of battery module when using, is favorable to the free thermal-insulated while of battery, also can reduce the risk of thermal runaway.

Description

Heat insulation structure, battery module and electric equipment

Technical Field

The application relates to the technical field of power batteries, in particular to a heat insulation structure, a battery module and electric equipment.

Background

Energy conservation and emission reduction are the key points of sustainable development of the automobile industry, and electric vehicles become important components of the sustainable development of the automobile industry due to the advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in its development.

In the development of battery technology, in addition to the safety performance of the battery, the safety of the battery needs to be considered, and thermal runaway is a factor affecting the safety of the battery, so how to reduce the occurrence probability of thermal runaway is an urgent technical problem to be solved in the battery technology.

SUMMERY OF THE UTILITY MODEL

An object of this application is to provide a thermal-insulated structure, battery module and consumer are favorable to reducing the probability that thermal runaway takes place.

In order to achieve the purpose, the following technical scheme is adopted in the application:

in a first aspect, the present application provides a thermal insulation structure comprising: a frame body, the inner edge of which is provided with an installation station; and a heat insulator disposed at the mounting station, the heat insulator having a first plane and a second plane disposed opposite to each other, the first plane and the second plane being exposed at the mounting station, and the first plane and/or the second plane being recessed with respect to a surface of the frame body.

In the process of above-mentioned realization, the inner edge of frame main part is provided with the installation station that is used for holding the heat insulating part, and the relative frame main part's of first plane and/or second plane of heat insulating part surface depression sets up for thermal-insulated structure is when insulating against heat, can leave the space for the battery monomer inflation of battery module when using, is favorable to the free thermal-insulated while of battery, also can reduce thermal runaway's risk.

In some embodiments, the heat insulation structure further comprises a fixing piece, the fixing piece is connected with the frame main body, and at least one part of the fixing piece is structurally corresponding to the installation station so as to form the fixation of the heat insulation piece and the frame main body.

In the process of realizing, the heat insulation piece is installed in the installation station of the frame body through the fixing piece, so that the phenomenon that the heat insulation piece and the frame body fall off cannot occur in the use process of the heat insulation structure, the product stability is improved, and meanwhile, the working efficiency can be ensured.

In some embodiments, at least a portion of the structure of the fixture is recessed relative to the frame body, the portion of the structure being coupled to the thermal shield.

In the process of the realization, the structure of one part of the fixing piece is sunken relative to the frame main body, so that the heat insulation structure can be favorable for air flowing in the using process, and meanwhile, the expansion of the battery monomer can be kept in a space, and the risk of thermal runaway is reduced.

In some embodiments, the fixing member is configured to be inclined at a connection corner of the frame body and the heat insulating member.

In the implementation process, the fixing piece is configured to be inclined, so that the purpose of saving the production cost can be achieved while the frame main body and the heat insulation piece are fixed.

In a second aspect, the present application further provides a battery module, including: the box body is provided with an end plate and a side plate, and the side plate is configured to be connected with the end plate so as to form an accommodating cavity in an enclosing mode; the battery monomers are arranged in the accommodating cavity; and the heat insulation structure is arranged between the end plate and the battery cell, and/or the heat insulation structure is arranged between two adjacent battery cells.

In the implementation process, the heat insulation structure is arranged between two adjacent single batteries and between the single batteries and the end plate of the box body, so that the single batteries can be subjected to fire prevention and heat insulation, and the service lives of the single batteries are prolonged.

In some embodiments, at least two of the thermal insulation structures are disposed between the end plate and the battery cell.

In the process of the realization, two heat insulation structures are arranged between the end plate and the battery monomer, so that the heat insulation function can be realized, and meanwhile, the heat of the battery monomer adjacent to the end plate can not be taken away by the end plate, thereby ensuring the electric quantity of the adjacent battery monomer and avoiding the loss of the capacity of the battery module.

In some embodiments, at least one of the thermal insulation structures is disposed between two adjacent battery cells.

At the in-process of above-mentioned realization, through set up thermal-insulated structure between two adjacent battery monomer for when a battery monomer takes place thermal runaway, the heat can be by the thermal-insulated structure separation, and prevents or greatly alleviates heat transfer and give adjacent battery monomer, improves battery module's security performance.

In some embodiments, the thickness of two of the thermal insulation structures disposed between the end plate and the battery cell is not less than the thickness of the thermal insulation structure between two adjacent battery cells.

In some embodiments, the battery module further includes a harness insulation plate assembly configured to be connected with the battery cells.

In a third aspect, the present application further provides an electric device, including the battery module as described in any one of the above.

The electric device provided in the third aspect of the present application includes the battery module according to any one of the second aspect of the present disclosure, so that all technical effects of any one of the above embodiments are achieved, and details are not repeated herein.

Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the present application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for a user of ordinary skill in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of an insulation structure disclosed in an embodiment of the present application.

Fig. 2 is a cross-sectional view of an insulation structure disclosed in an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a battery module according to an embodiment of the present disclosure.

Reference numerals

100. A thermally insulating structure; 101. a frame body; 102. a thermal insulation member; 1021. a first plane; 1022. a second plane; 103. a fixing member; 200. a battery module; 201. an end plate; 202. a side plate; 203. a battery cell; 204. a wire harness isolation assembly.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a user of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of the present application.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience of describing the present application and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case to a user of ordinary skill in the art.

Examples

The inventor discovers at the in-process of design, at present battery safety requires more and more highly, after special requirement single electric core takes place the thermal runaway, do not endanger adjacent electric core, and do not arouse the thermal runaway of adjacent electric core, in order to avoid this phenomenon to take place, among the prior art, generally adopt the blotter to set up between the electric core, but this blotter all sets up the parallel and level form with the relative both sides face of electric core contact, in the in-process of using, be used for absorbing tolerance, the tolerance of battery module manufacturing process and the inflation of electric core life final stage etc. can't very well the separation electric core take place the thermal runaway.

In view of the above, as shown in fig. 1, fig. 1 is a schematic structural diagram of an insulation structure 100 disclosed in an embodiment of the present application; in a first aspect, the present application provides an insulation structure 100 comprising: a frame main body 101 and a heat insulator 102, wherein the heat insulator 102 is disposed on the frame main body 101, the thickness of the heat insulator 102 is smaller than the thickness of the frame main body 101, and both of a first plane 1021 and a second plane 1022, which are provided opposite to each other, of the heat insulator 102 are recessed with respect to the surface of the frame main body 101 so as to accommodate at least a part of the expanded battery cells 203 of the battery module 200.

Specifically, an installation station is arranged on the inner edge of the frame body 101; the heat insulator 102 is configured at the installation station, the heat insulator 102 has a first plane 1021 and a second plane 1022 which are oppositely arranged, the first plane 1021 and the second plane 1022 are exposed at the installation station, and the first plane 1021 and/or the second plane 1022 are recessed relative to the surface of the frame body 101 (i.e. the first plane 1021 and/or the second plane 1022 are both located in the installation station).

Illustratively, the frame main body 101 includes but is not limited to a silicone frame, the mounting station includes but is not limited to a mounting groove, the mounting groove penetrates through the frame main body 101 along a vertical direction thereof, so that the heat insulation member 102 can be used for exposing the heat insulation member 102 when the heat insulation member 102 is disposed at the mounting station, the frame main body 101 and the mounting station can be both rectangular in shape and can be also provided with other shapes, and in general, the center of the mounting station coincides with the center of the frame main body 101, so as to ensure that the center of the heat insulation member 102 can coincide with the center of the battery cell 203 of the battery module 200 during the use of the heat insulation structure 100, thereby achieving good heat insulation and buffering effects; the thermal insulation member 102 includes, but is not limited to, aerogel, and when the capacity of the battery cell 203 is 100Ah or more, the thickness of the frame main body 101 is 4mm or more, and the thickness of the thermal insulation member 102 is 3mm or more, wherein the thickness of the frame main body 101 can be determined according to the expansion amount and the expansion force of the battery cell 203, and the thickness of the frame main body 101 is generally 1mm or more larger than the thickness of the thermal insulation member 102, and when the thermal insulation member 102 is mounted on the frame main body 101, the first plane 1021 of the thermal insulation member 102 is 0.5mm from the upper surface of the frame main body 101, and the second plane 1022 of the thermal insulation member 102 is 0.5mm from the lower surface of the frame main body 101, which certainly does not exclude the case where the distances of the thermal insulation member 102 from the upper and lower surfaces of the frame main body 101 are not equal.

In the implementation process, the inner edge of the frame main body 101 is provided with an installation station for accommodating the heat insulating member 102, and the first plane 1021 and/or the second plane 1022 of the heat insulating member 102 are/is recessed relative to the surface of the frame main body 101, so that when the heat insulating structure 100 is used for heat insulation, a space can be left for the battery cells 203 of the battery module 200 to expand when in use, which is beneficial to heat insulation of the battery cells 203 and can also reduce the risk of thermal runaway.

Referring to fig. 1, the heat insulation structure 100 further includes a fixing member 103, the fixing member 103 is connected to the frame main body 101, at least a portion of the fixing member 103 corresponds to the mounting station, and the fixing member 103 may be fixed to the frame main body 101 by using a hot pressing method.

For example, the fixing member 103 includes, but is not limited to, a pet (polyester film) film, the fixing member 103 is disposed on an outer surface of the frame body 101, in some embodiments, an outer edge of the fixing member 103 may be flush with an outer edge of the frame body 101, and the fixing member 103 may be connected to a portion of the structure of the thermal insulation member 102, such that when the battery cells 203 of the battery module 200 expand, the battery cells 203 directly contact the thermal insulation member 102.

In the implementation process, the heat insulation piece 102 is installed in the installation station of the frame main body 101 through the fixing piece 103, so that the heat insulation structure 100 is ensured not to fall off from the frame main body 101 in the use process, the product stability is improved, and meanwhile, the work efficiency can be ensured.

As shown in fig. 2, fig. 2 is a cross-sectional view of an insulation structure 100 disclosed in an embodiment of the present application; at least one part of the fixing member 103 is recessed with respect to the frame body 101, and is connected to the heat insulating member 102; when the heat insulation structure 100 is disposed in a battery module 200, the large surface of the battery cell 203 of the battery module 200 directly contacts with the corresponding fixing member 103 of the frame main body 101, and when the battery cell 203 expands during use, the mounting station of the frame main body 101 can accommodate at least a part of the battery cell 203, so that the battery cell 203 contacts with the heat insulation member 102, and the service life of the battery cell 203 is prolonged.

In the implementation process, a part of the fixing part 103 is recessed relative to the frame main body 101, so that the heat insulation structure 100 can facilitate the flow of air in the use process, and meanwhile, a space can be reserved for the expansion of the battery cells 203 in the use process, and the risk of thermal runaway is reduced.

Referring to fig. 2, at a connection corner of the frame body 101 and the heat insulation member 102, the fixing member 103 is configured to be inclined; in other embodiments, the fixing member 103 may also be disposed in a right-angled shape corresponding to a connection corner between the frame main body 101 and the heat insulation member 102, and by disposing the fixing member 103 in an inclined shape, the frame main body 101 and the heat insulation member 102 are fixed, and meanwhile, the purpose of saving production cost can also be achieved.

As shown in fig. 3, fig. 3 is a schematic structural diagram of a battery module 200 disclosed in the embodiment of the present application; in a second aspect, the present application also provides a battery module 200, including: the box body is provided with an end plate 201 and a side plate 202, and the side plate 202 is connected with the end plate 201 to form a containing cavity in an enclosing mode; a plurality of battery cells 203 arranged in the accommodating cavity; and the heat insulation structure 100 according to any one of the above claims, wherein the heat insulation structure 100 is disposed between the end plate 201 and the battery cell 203, and/or the heat insulation structure 100 is disposed between two adjacent battery cells 203.

For example, the material of the box body includes, but is not limited to, aluminum, the size of the box body may be set according to the number of the battery cells 203, and the connection manner between the end plate 201 and the side plate 202 may be welding, or screwing.

It should be noted that, when the thermal insulation structure 100 is disposed between two adjacent battery cells 203, each battery cell 203 may place the thermal insulation structure 100, every two battery cells 203 may place the thermal insulation structure 100, every three battery cells 203 may place the thermal insulation structure 100, and the set position of the thermal insulation structure 100 may be designed according to an actual situation, which is not described herein repeatedly.

In the implementation process, the heat insulation structure 100 is arranged between two adjacent single batteries 203 and between the single batteries 203 and the end plate 201 of the box body, so that the single batteries 203 can be subjected to fire prevention and heat insulation, and the service life of the single batteries 203 can be prolonged.

The inventor finds that, because the end plate 201 of the box is made of all aluminum, when a plurality of the battery cells 203 are disposed in the accommodating cavity of the box, heat of the battery cells 203 adjacent to the end plate 201 is easily taken away by the end plate 201, so that the temperature of the battery cells 203 adjacent to the end plate 201 is greatly different from that of the battery cells 203 at the middle position, which easily causes the capacity loss of the battery module 200 and further causes the electric quantity loss.

In view of this, referring to fig. 3, at least two heat insulation structures 100 are disposed between the end plate 201 and the battery cell 203, and two heat insulation structures 100 are disposed between the end plate 201 and the battery cell 203, so that a heat insulation function can be performed, and at the same time, it can be ensured that heat of the battery cell 203 adjacent to the end plate 201 is not taken away by the end plate 201, thereby ensuring electric quantity of the adjacent battery cell 203, and avoiding loss of capacity of the battery module 200.

Referring to fig. 3 again, at least one of the thermal insulation structures 100 is disposed between two adjacent battery cells 203, and the thermal insulation structure 100 is disposed between two adjacent battery cells 203, so that when thermal runaway occurs in one battery cell 203, heat can be blocked by the thermal insulation structure 100, heat transfer to the adjacent battery cell 203 is prevented or greatly reduced, and safety performance of the battery module 200 is improved.

In some embodiments, the thickness of two thermal insulation structures 100 disposed between the end plate 201 and the battery cell 203 is not less than the thickness of the thermal insulation structure 100 disposed between two adjacent battery cells 203, and it is understood that two thermal insulation structures 100 disposed between the end plate 201 and the battery cell 203 may form a thermal insulation function similar to a double-layer glass effect during the assembly process, so that the heat of the battery cell 203 can be reduced to be taken away by the end plate 201.

Referring to fig. 3 again, the battery module 200 further includes a harness insulation board assembly configured to be connected to the battery cells 203. Illustratively, the wire harness isolation plate assembly is disposed above the battery cell 203, and the wire harness isolation plate assembly is welded to a pole of the battery cell 203 for transmitting a high-voltage current, collecting a voltage signal, a temperature signal of the battery cell 203, and the like.

In a third aspect, the present application further provides an electric device, which includes the battery module 200 as described in any one of the above embodiments. Exemplarily, the electric equipment can be a fuel automobile, a new energy automobile or the like, the new energy automobile can be a pure electric automobile, a hybrid electric automobile, an extended range type automobile or the like, the inside of the electric equipment is provided with the battery module 200, and the battery module 200 can be arranged at the bottom or the head or the tail of the electric equipment so as to supply power to the electric equipment.

The electric device provided in the third embodiment of the present application includes the battery module 200 according to any one of the second technical solutions, so that all technical effects of any one of the above embodiments are achieved, and are not described herein again.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An insulating structure, comprising:

a frame body, the inner edge of which is provided with an installation station;

and a heat insulator disposed at the mounting station, the heat insulator having a first plane and a second plane disposed opposite to each other, the first plane and the second plane being exposed at the mounting station, and the first plane and/or the second plane being recessed with respect to a surface of the frame body.

2. The insulation structure according to claim 1, further comprising a fixing member connected to the frame body, and at least a portion of the fixing member is structured to correspond to the mounting station to form a fixation of the insulation member to the frame body.

3. The insulating structure according to claim 2, wherein at least a portion of the structure of the fixing member is recessed with respect to the frame body, and the portion of the structure is connected to the insulating member.

4. The heat insulating structure according to claim 3, wherein the fixing member is configured to be inclined at a connection corner of the frame body and the heat insulating member.

5. A battery module, comprising:

the box body is provided with an end plate and a side plate, and the side plate is configured to be connected with the end plate so as to enclose and form an accommodating cavity;

the battery monomers are arranged in the accommodating cavity; and

the thermal insulation structure of any one of claims 1 to 4, the thermal insulation structure being disposed between the end plate and the battery cell, and/or the thermal insulation structure being disposed between two adjacent battery cells.

6. The battery module according to claim 5, wherein at least two of the thermal insulation structures are disposed between the end plates and the battery cells.

7. The battery module according to claim 6, wherein at least one heat insulation structure is disposed between two adjacent battery cells.

8. The battery module according to claim 7, wherein the thickness of two of the heat insulation structures disposed between the end plate and the battery cell is not less than the thickness of the heat insulation structure between two adjacent battery cells.

9. The battery module according to claim 5, further comprising a harness separator assembly configured to be connected to the battery cells.

10. An electric device comprising the battery module according to any one of claims 5 to 9.