Battery composite box body and battery box

Abstract

The battery composite box comprises a water cooling plate, a frame and a bottom protection plate, and the water cooling plate is provided with a first plate face and a second plate face which are opposite in orientation in a limited mode; the frame is attached and fixed to the first plate face and arranged in the circumferential direction of the first plate face in a surrounding mode. The bottom protection plate is attached and fixed to the second plate face, and the opposite inner side face of the second plate face and / or the bottom protection plate is provided with a flow channel structure for refrigerant circulation. Wherein the frame is of a first composite structure, and the first composite structure comprises a metal matrix and a first insulating layer wrapping the metal matrix; the bottom protective plate is of a second composite structure, and the second composite structure comprises a second insulating layer, a honeycomb layer and a protective layer which are sequentially stacked and integrally formed from the second plate face to the side away from the first plate face. The utility model also provides a battery box with the same. According to the utility model, the structural weight can be reduced under the condition of ensuring the structural strength, the battery or the battery cell can be effectively protected, and the water-cooling plate can be sufficiently supported and prevented from being deformed while the insulation and heat insulation performances are realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery application, in particular to a battery composite box and a battery box. BACKGROUND

[0002] As a bearing structure of the battery, the battery box needs to have certain structural strength and meet excellent insulation and heat insulation performance. In order to meet the performance requirements, the traditional battery box is usually made of metal material to realize a multi-layer plate structure sandwiching a water-cooling base. The battery box is not only thick and heavy, but also will be electrified when leakage occurs, which is not conducive to safety protection.

[0003] To this end, the prior art proposes to coat a heat insulation material on the metal material, which improves the insulation and heat insulation performance, but also increases the weight of the box, which is not conducive to the light weight of the automobile, and the coated material is easy to fall off during temperature change, which has certain safety hazards. Therefore, the prior art proposes to use a resin composite material to form a box structure combined with multiple laminated plates, in order to reduce the weight of the battery box while meeting the insulation and heat insulation performance. However, the related technology not only reduces the weight of the battery box, but also to some extent realizes the heat insulation and insulation function, but the structural rigidity and strength cannot meet the collision requirements, and in the event of collision or other accidents, the battery core may be damaged, leading to fire or even explosion and other safety accidents. CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems, the embodiments of the present application provide a battery composite box and a battery box, which can reduce the structural weight while ensuring the rigidity and strength, and have insulation and heat insulation performance.

[0005] According to one aspect of the embodiments of the present application, a battery composite box is provided, comprising: a water-cooling plate defining first and second plate faces facing opposite directions; a frame fixedly attached to the first plate face and surrounding the periphery of the first plate face; and a bottom guard plate fixedly attached to the second plate face, the opposite inner side of the second plate face and / or the bottom guard plate being provided with a flow channel structure for the circulation of refrigerant; wherein the frame is a first composite structure comprising a metal base and a first insulation layer covering the metal base; and the bottom guard plate is a second composite structure comprising a second insulation layer, a honeycomb layer and a protective layer sequentially stacked and integrally formed from the second plate face to the side away from the first plate face.

[0006] In an exemplary embodiment of the present application, the frame comprises a first frame body, a second frame body, a third frame body and a fourth frame body composed of the first composite structure, the first frame body, the second frame body, the third frame body and the fourth frame body being connected end to end to enclose a receiving space with open ends; the first plate face is provided with an inlet and outlet joint assembly communicating with the flow channel structure, and the inlet and outlet joint assembly is located in the receiving space.

[0007] In one exemplary embodiment of this application, the frame further includes at least one fifth frame body composed of a first composite structure. The fifth frame body is disposed within the accommodating space, and its two ends in the length direction respectively abut against the opposite inner sides of the first frame body and the third frame body, thereby dividing the accommodating space into a first accommodating cavity for accommodating an inlet / outlet connector assembly and a second accommodating cavity for placing a battery or battery cell.

[0008] In one exemplary embodiment of this application, the frame further includes at least one sixth frame composed of a first composite structure. The sixth frame is disposed perpendicular to the fifth frame in the second accommodating cavity, and its two ends in the length direction respectively abut against the relative inner sides of the fifth frame and the second frame, the relative inner sides of the fifth frame and the fourth frame, or the relative inner sides of two adjacent fifth frames.

[0009] In one exemplary embodiment of this application, the first composite structure is formed by extrusion molding, and the first insulating layer is extruded and coated on the outer surface of the metal substrate.

[0010] In one exemplary embodiment of this application, the metal substrate is made of aluminum alloy or steel, and the first insulating layer is made of glass fiber composite material.

[0011] In one exemplary embodiment of this application, the second insulating layer is made of fiberglass composite material, the honeycomb layer is made of honeycomb aluminum plate or PP material honeycomb plate, and the protective layer is made of fiberglass composite material or steel.

[0012] In one exemplary embodiment of this application, the second composite structure is integrally formed by stamping.

[0013] In an exemplary embodiment of this application, the second insulating layer, the honeycomb layer, and the protective layer are respectively pre-stamped. The upper end of the pre-stamped second insulating layer is recessed downward to form a flow channel structure. The upper end of the pre-stamped protective layer is formed with a third accommodating cavity for accommodating the flow channel structure and the honeycomb layer. The second insulating layer, the honeycomb layer, and the protective layer are stacked sequentially from top to bottom and then integrally formed by stamping.

[0014] According to a second aspect of the embodiments of this application, a battery box is provided, including any of the battery composite box bodies described above.

[0015] This invention utilizes a first composite structure with an insulating material covering a metal substrate to create a frame, which is then enclosed on the first surface of a water-cooling plate to accommodate the battery or cell. This reduces the structural weight while maintaining structural strength and provides effective protection for the battery or cell. Simultaneously, the battery or cell placed within the frame can be supported by the water-cooling plate to achieve direct heat transfer, effectively dissipating heat from the battery. Then, a bottom protective plate is created using a three-layer integrally molded second composite structure and placed on the second surface of the water-cooling plate. This provides insulation and heat insulation properties while offering sufficient support for the water-cooling plate, preventing deformation.

[0016] The above description is merely an overview of the technical solutions of the embodiments of this application. In order to better understand the technical means of the embodiments of this application and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of this application more obvious and understandable, specific implementation methods of this application are described below. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the battery composite housing described in an embodiment of this application is shown;

[0019] Figure 2 An exploded view of the battery composite housing described in an embodiment of this application is shown;

[0020] Figure 3 A schematic diagram of the first composite structure described in an embodiment of this application is shown;

[0021] Figure 4 A schematic diagram of the structure of the bottom protective plate according to an embodiment of this application is shown;

[0022] Figure 5 A schematic diagram of the border structure described in an embodiment of this application is shown.

[0023] Explanation of icon numbers:

[0024] 1-Water-cooled plate, 11-First plate surface, 12-Second plate surface, 13-Inlet / outlet connector assembly,

[0025] 2-Frame, 21-First frame, 211-First composite structure, 2111-Metal substrate, 2112-First insulating layer, 22-Second frame, 23-Third frame, 24-Fourth frame, 25-Accommodation space, 251-First accommodating cavity, 252-Second accommodating cavity, 26-Fifth frame, 27-Sixth frame, 28-Groove

[0026] 3-Bottom protective plate, 31-Second insulation layer, 32-Honeycomb layer, 33-Protective layer, 331-Third accommodating cavity, 4-Flow channel structure.

[0027] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0029] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0030] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present application, and should not be construed as limiting the present application.

[0031] like Figures 1 to 4As shown, this embodiment provides a battery composite housing, including a water-cooled plate 1, a frame 2, and a bottom protective plate 3. The water-cooled plate 1 defines a first plate surface 11 and a second plate surface 12 facing opposite directions. The frame 2 is attached and fixed to the first plate surface 11 and surrounds the circumference of the first plate surface 11. The bottom protective plate 3 is attached and fixed to the second plate surface 12. The opposite inner surfaces of the second plate surface 12 and / or the bottom protective plate 3 are provided with a flow channel structure 4 for the flow of refrigerant. The frame 2 is a first composite structure 211, which includes a metal substrate 2111 and a first insulating layer 2112 covering the metal substrate 2111. The bottom protective plate 3 is a second composite structure, which includes a second insulating layer 31, a honeycomb layer 32, and a protective layer 33 that are sequentially stacked and integrally formed from the second plate surface 12 toward the side away from the first plate surface 11. In this way, the frame 2 is made by using the first composite structure 211, which is made by covering the metal substrate 2111 with insulating material, and the frame 2 is enclosed on the first plate surface 11 of the water-cooled plate 1 to accommodate the battery or cell. This can reduce the structural weight while ensuring structural strength and provide effective protection for the battery or cell. The battery or cell placed inside the frame 2 can be supported by the water-cooled plate 1 to achieve direct heat transfer and effectively dissipate heat from the battery. At the same time, the bottom protective plate 3 made by the second composite structure can use the second insulating layer 31 to provide insulation and heat insulation, the honeycomb layer 32 to provide shock absorption and energy absorption, and the protective layer 33 to provide support and protection. The three-layer integrated bottom protective plate 3 is covered on the second plate surface 12 of the water-cooled plate 1, which can provide sufficient support for the water-cooled plate 1 and prevent the water-cooled plate 1 from deforming while achieving the above functions.

[0032] It is understood that the aforementioned flow channel structure 4 may be provided only within the second plate surface 12 of the water-cooling plate 1. In this case, the bottom protective plate 3 covers and seals the flow channel structure 4 when it is closed and attached to the water-cooling plate 1. Alternatively, it may be provided only on the outer surface of the second insulating layer 31 of the bottom protective plate 3. In this case, the water-cooling plate 1 covers and seals the flow channel structure 4 when it is closed and attached to the bottom protective plate 3. Alternatively, corresponding partial flow channel structures 4 may be opened on the relative inner sides of the second plate surface 12 and the second insulating layer 31. When the water-cooling plate 1 and the bottom protective plate 3 are closed and attached to each other, the corresponding partial flow channel structures 4 are closed and sealed to form a complete flow channel structure 4.

[0033] It is also understood that the methods of fixing the frame 2 to the water-cooled plate 1 and the water-cooled plate 1 to the bottom protective plate 3 include, but are not limited to, welding, riveting, bolting, mortise and tenon joints, adhesive bonding, and FDS bonding, which will not be elaborated here. Alternatively, a space can be left between the frame 2 and the bottom protective plate 3 to accommodate the water-cooled plate 1, allowing the frame 2 and the bottom protective plate 3 to be fitted together and fixedly connected, thus clamping the water-cooled plate 1 between the frame 2 and the bottom protective plate 3; for example, as... Figures 1 to 3As shown, a groove 28 adapted to the outer contour size of the water-cooled plate 1 is formed on the inner side of the end of the frame 2 that is used to attach the water-cooled plate 1, so as to form a space to accommodate the water-cooled plate 1; at this time, the contact surface of the frame 2 that is used to contact the bottom protective plate 3 is the first insulating layer 2112, and the contact surface of the bottom protective plate 3 that is used to contact the frame 2 is the second insulating layer 31. The first insulating layer 2112 and the second insulating layer 31 can be made of the same insulating material, thereby realizing the effective connection between the frame 2 and the bottom protective plate 3, and ensuring the connection stability and sealing.

[0034] In some embodiments, such as Figure 1 , Figure 2 and Figure 5 As shown, the frame 2 includes a first frame 21, a second frame 22, a third frame 23, and a fourth frame 24, all composed of a first composite structure 211. The first frame 21, the second frame 22, the third frame 23, and the fourth frame 24 are connected end to end to form an accommodating space 25 with openings at both ends. The first plate surface 11 is provided with an inlet / outlet connector assembly 13 connected to the flow channel structure 4. The inlet / outlet connector assembly 13 is located in the accommodating space 25. In this way, the frame 2 can effectively protect the battery or cell placed in the accommodating space 25 and the inlet / outlet connector assembly 13, preventing them from being damaged in the event of a collision. At the same time, the battery or cell placed in the accommodating space 25 can be directly supported on the first plate surface 11 of the water-cooled plate 1 to achieve direct heat transfer and ensure the heat dissipation performance of the battery or cell.

[0035] In some embodiments, such as Figure 1 , Figure 2 and Figure 5 As shown, the frame 2 also includes at least one fifth frame 26 composed of a first composite structure 211. The fifth frame 26 is disposed within the accommodating space 25, and its two ends in the longitudinal direction respectively abut against the opposite inner sides of the first frame 21 and the third frame 23, dividing the accommodating space 25 into a first accommodating cavity 251 for accommodating the inlet / outlet connector assembly 13 and a second accommodating cavity 252 for placing the battery. In this way, on the one hand, the torque transmission between the first frame 21 and the third frame 23 can be realized through the fifth frame 26, improving the structural strength and connection stability of the overall structure of the frame 2; on the other hand, the inlet / outlet connector assembly 13 can be isolated from the battery or cell, ensuring the sealing effectiveness between different components.

[0036] Preferably, when there are two or more fifth frames 26, adjacent fifth frames 26 are spaced apart and arranged in parallel to each other to achieve uniform torque transmission.

[0037] In some embodiments, such as Figure 1 , Figure 2 and Figure 5As shown, the frame 2 also includes at least one sixth frame 27 composed of a first composite structure 211. The sixth frame 27 is disposed perpendicularly to the fifth frame 26 in the second accommodating cavity 252, and its two ends along its length direction abut against the relative inner sides of the fifth frame 26 and the second frame 22, the relative inner sides of the fifth frame 26 and the fourth frame 24, or the relative inner sides of two adjacent fifth frames 26, depending on the orientation of the arrangement. For example, in this embodiment, there are two fifth frames 26, which are spaced apart and arranged parallel to each other; there are two sixth frames 27, one of which abuts perpendicularly against the relative inner sides of the fifth frame 26 and the second frame 22, and the other of which abuts perpendicularly against the relative inner sides of the two fifth frames 26. In this way, on the one hand, the second accommodating cavity 252 can be further divided into more chambers by the sixth frame 27 to realize the arrangement of multiple batteries or multiple cells; on the other hand, torque can be transmitted along its two ends along its length direction, improving the structural strength and structural stability of the overall structure of the frame 2.

[0038] In some embodiments, the first composite structure 211 can be formed by extrusion molding using a die, so that the first insulating layer 2112 is extruded and coated onto the outer surface of the metal substrate 2111, thereby forming a first composite structure 211 with high impact resistance, high rigidity, and high hardness, and also possessing certain insulation and heat insulation properties. Using extrusion molding to manufacture the first composite structure 211 not only results in high material utilization but also improves the material's microstructure and mechanical properties, and is simple to operate and has high productivity.

[0039] Furthermore, the metal substrate 2111 can be made of profiles or plates with good elongation and high mechanical strength, preferably aluminum alloy or steel; the first insulating layer 2112 can be made of a material with low density and excellent insulation and heat insulation properties, preferably glass fiber composite material. In this way, the metal substrate 2111 made of aluminum alloy or steel can effectively increase the mechanical strength of the first composite structure 211; the first insulating layer 2112 made of glass fiber composite material can play the role of insulation, heat insulation and the main load-bearing role of the box, thereby improving the insulation performance and heat insulation performance of the first composite structure 211.

[0040] It is understood that the aforementioned glass fiber composite materials refer to glass fiber reinforced composite materials, which are made by combining glass fiber as the reinforcing material and a resin matrix as the matrix material through a certain molding process. Examples include epoxy glass fiber composite materials, phenolic glass fiber composite materials, and polyester glass fiber composite materials. Utilizing the characteristics of glass fiber—lightweight, high strength, insulation, low coefficient of thermal expansion, and excellent high-temperature resistance—it can be effectively used for insulation and thermal control of battery boxes.

[0041] In some embodiments, the second insulating layer 31 can be made of a lightweight material with excellent insulation and heat insulation properties and easy stamping, including but not limited to foam, fiberglass composite materials, etc., preferably fiberglass composite materials; the honeycomb layer 32 can be made of a lightweight material with high energy absorption during compression deformation, preferably a honeycomb aluminum plate or a honeycomb panel made of PP material; the protective layer 33 can be made of a lightweight material with high hardness after molding, preferably a fiberglass composite material or steel. Thus, the second insulating layer 31 made of fiberglass composite material can play a role in insulation, heat insulation, and main stress bearing, improving the insulation and heat insulation performance of the second composite structure; the honeycomb layer 32 made of honeycomb aluminum plate or PP material can effectively increase the vibration isolation performance of the second composite structure; and the protective layer 33 made of fiberglass composite material or steel can play a main stress bearing role, improving the mechanical strength of the second composite structure.

[0042] It is understood that the water-cooled plate 1 can be formed by stamping and brazing aluminum alloy, and the first insulating layer 2112 and the second insulating layer 31 can be made of the same glass fiber composite material. In this way, the material consistency of the connection surface can be guaranteed, providing an effective connection when the frame 2 and the bottom protective plate 3 are fixedly attached to the water-cooled plate 1, and ensuring the stability of the connection.

[0043] It is also understandable that the aforementioned frame 2 and bottom protective plate 3 can be adjusted in terms of angle or thickness and other structural features according to different mechanical performance requirements. The battery composite box made of the aforementioned materials can achieve a weight reduction of about 10% to 30% under the same mechanical strength, and has excellent insulation and heat insulation performance.

[0044] In some embodiments, the second composite structure is integrally formed by stamping to achieve an effective connection between the second insulating layer 31, the honeycomb layer 32, and the protective layer 33.

[0045] It is understandable that when the second composite structure composed of the above-mentioned material combination forms a flow channel structure 4 on the upper surface of the second insulating layer 31, the second insulating layer 31 and the honeycomb layer 32 can be pressed by stamping. At this time, the second insulating layer 31 deforms and forms the flow channel structure 4, and the area of ​​the honeycomb layer 32 corresponding to the flow channel structure 4 is compacted, thus forming an integral part with the protective layer 33. Alternatively, the second insulating layer 31, the honeycomb layer 32, and the protective layer 33 can be pre-stamped separately, such as... Figure 2 As shown, the upper end of the pre-stamped second insulating layer 31 is recessed downward to form a flow channel structure 4, and the upper end of the pre-stamped protective layer 33 has a third accommodating cavity 331 for accommodating the flow channel structure 4 and the honeycomb layer 32. In this way, by stacking the second insulating layer 31, the honeycomb layer 32 and the protective layer 33 from top to bottom and then stamping them together, deformation of the honeycomb layer 32 can be avoided, and the vibration reduction and impact resistance of the bottom protective plate 3 can be further improved.

[0046] Furthermore, this utility model embodiment also provides a battery box, which is the battery composite box in the above embodiment. For other structures and working principles of the battery composite box, please refer to the above description of the system embodiments. Since the battery composite box has the above-mentioned technical effects, vehicles equipped with this battery composite box should also have corresponding technical effects, which will not be elaborated further here.

[0047] In another embodiment, a vehicle is also provided, including the battery composite housing or battery box described in the above embodiments. For other structures and working principles of the battery composite housing, please refer to the above description of the system embodiments. Since the battery composite housing has the aforementioned technical effects, the vehicle having this battery composite housing should also have corresponding technical effects, which will not be elaborated further here.

[0048] It is understood that, unless otherwise expressly specified and limited, the terms "assembly," "connection," etc., in this application should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified. The terms "some embodiments," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application.

[0050] The illustrative expressions of the terms used above do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, those skilled in the art can combine and integrate the different embodiments or examples described herein, as well as the features of those different embodiments or examples, without contradiction.

[0051] Although embodiments of this application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can modify, substitute, and vary the above embodiments within the scope of this application. Therefore, any changes or modifications made in accordance with the claims and description of this application should fall within the scope of this patent application.

Claims

1. A battery composite housing, characterized in that, include: A water-cooled plate, the water-cooled plate defining a first plate surface and a second plate surface facing opposite directions; The frame is attached and fixed to the first plate surface and surrounds the circumference of the first plate surface; and A bottom protective plate is attached and fixed to the second plate surface, and the opposite inner surfaces of the second plate surface and / or the bottom protective plate are provided with a flow channel structure for refrigerant circulation. The frame is a first composite structure, which includes a metal substrate and a first insulating layer covering the metal substrate. The bottom protective plate is a second composite structure, which includes a second insulating layer, a honeycomb layer and a protective layer that are stacked sequentially and integrally formed from the second plate surface to the side away from the first plate surface.

2. The battery composite housing according to claim 1, characterized in that, The frame includes a first frame, a second frame, a third frame, and a fourth frame, all formed by the first composite structure. The first frame, the second frame, the third frame, and the fourth frame are connected end to end to form an accommodating space with openings at both ends. The first plate surface is provided with an inlet / outlet connector assembly that communicates with the flow channel structure. The inlet / outlet connector assembly is located in the accommodating space.

3. The battery composite housing according to claim 2, characterized in that, The frame also includes at least one fifth frame made of the first composite structure. The fifth frame is disposed in the accommodating space, and its two ends in the length direction respectively abut against the opposite inner sides of the first frame and the third frame, and divide the accommodating space into a first accommodating cavity for accommodating the inlet and outlet connector assembly and a second accommodating cavity for placing the battery or cell.

4. The battery composite housing according to claim 3, characterized in that, The frame also includes at least one sixth frame formed by the first composite structure. The sixth frame is disposed perpendicular to the fifth frame in the second accommodating cavity, and its two ends in the length direction respectively abut against the relative inner sides of the fifth frame and the second frame, the relative inner sides of the fifth frame and the fourth frame, or the relative inner sides of two adjacent fifth frames.

5. The battery composite housing according to claim 1, characterized in that, The first composite structure is formed by extrusion molding, and the first insulating layer is extruded and coated on the outer surface of the metal substrate.

6. The battery composite housing according to claim 2, characterized in that, The metal substrate is made of aluminum alloy or steel, and the first insulating layer is made of glass fiber composite material.

7. The battery composite housing according to any one of claims 1-6, characterized in that, The second insulating layer is made of fiberglass composite material, the honeycomb layer is made of honeycomb aluminum plate or PP material honeycomb plate, and the protective layer is made of fiberglass composite material or steel.

8. The battery composite housing according to claim 7, characterized in that, The second composite structure is formed by stamping.

9. The battery composite housing according to claim 7, characterized in that, The second insulating layer, the honeycomb layer, and the protective layer are respectively pre-stamped. The upper end of the pre-stamped second insulating layer is recessed downward to form the flow channel structure. The upper end of the pre-stamped protective layer is formed with a third accommodating cavity for accommodating the flow channel structure and the honeycomb layer. The second insulating layer, the honeycomb layer, and the protective layer are stacked from top to bottom and then integrally formed by stamping.

10. A battery box, characterized in that, Includes the battery composite housing as described in any one of claims 1-9.

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