Box body structure and battery pack

Abstract

The utility model belongs to the technical field of batteries, and provides a box body structure and a battery pack, the box body structure comprises a box body, and the box body comprises a bottom protective plate, first foaming silica gel foam, a liquid cooling plate, second foaming silica gel foam and a box body frame which are connected in sequence. The first foaming silica gel foam and the second foaming silica gel foam are installed in the box body structure, on one hand, the sealing performance of the box body structure can be improved, on the other hand, heat conduction between the box body frame and the liquid cooling plate and heat conduction between the liquid cooling plate and the bottom protection plate can be reduced, effective heat insulation is conducted on the liquid cooling plate and the box body frame, and the service life of the liquid cooling plate is prolonged. The condition of large temperature change is avoided; the heat preservation foam is installed in the inner cavity of the bottom protection plate, heat transfer between the liquid cooling plate and the bottom protection plate is further blocked, and the heat preservation performance is enhanced.

Description

Technical Field

[0001] This utility model belongs to the field of battery casing technology, and specifically relates to a box structure and battery pack. Background Technology

[0002] The development of new energy power batteries is an inevitable trend, especially in the field of power batteries. Power batteries can provide new energy vehicles with a continuous source of power, serving as either the sole power source or one of several energy sources. With the continuous development of new energy vehicles, customer usage scenarios are becoming increasingly complex and diverse, particularly for customers in cold weather, making battery insulation performance a crucial factor. Good insulation performance is closely related to battery lifespan and vehicle range, and is key to achieving the desired range in cold regions.

[0003] There are two existing solutions for liquid-cooled battery packs: the first involves welding a liquid cooling plate to the battery pack casing using friction stir welding; the second involves fixing and sealing the liquid cooling plate with hot-melt nails and structural sealant. In the first solution, the liquid cooling plate is in direct contact with the casing frame, resulting in high thermal conductivity and rapid heat transfer, leading to significant temperature variations in the battery pack. While the second solution uses structural sealant between the liquid cooling plate and the casing frame, the thinner sealant layer also results in relatively rapid heat transfer.

[0004] Therefore, the above solutions do not provide heat insulation for the liquid cooling plate and the shell frame, resulting in significant temperature variations. Utility Model Content

[0005] To address the problems in the background art, this utility model proposes a housing mechanism and a battery pack.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A box structure, comprising a box;

[0008] The enclosure includes a bottom protective plate, a first foamed silicone foam, a liquid cooling plate, a second foamed silicone foam, and an enclosure frame connected in sequence.

[0009] Preferably, the bottom protective plate, the first foamed silicone foam, and the liquid cooling plate are sequentially and sealed together.

[0010] Preferably, it further includes a first bolt and a first sealing rivet nut;

[0011] The first sealing rivet nut is fixedly installed on the surface of the liquid cooling plate;

[0012] The first bolt passes through the bottom protective plate and the first foamed silicone foam in sequence, and is sealed and connected to the first sealing rivet nut.

[0013] Preferably, the bottom protective plate has an inner cavity on the surface facing the first foamed silicone foam, and thermal insulation foam is installed in the inner cavity.

[0014] Preferably, the liquid cooling plate, the second foamed silicone foam, and the box frame are sequentially and sealed together.

[0015] Preferably, it further includes a second bolt and a second sealing rivet nut;

[0016] The second sealing rivet nut is fixedly installed on the surface of the box frame;

[0017] The second bolt passes through the liquid cooling plate and the second foamed silicone foam 9 in sequence, and is sealed and connected to the second sealing rivet nut.

[0018] Preferably, the thickness of the first foamed silicone foam is 10±2mm.

[0019] Preferably, the thickness of the second foamed silicone foam is 5±1mm.

[0020] Preferably, the bottom protective plate, the box frame, and the liquid cooling system are made of aluminum alloy.

[0021] A battery pack is installed in the aforementioned housing structure.

[0022] The beneficial effects of this utility model are:

[0023] 1. This utility model improves the sealing performance of the box structure by installing a first foamed silicone foam and a second foamed silicone foam in the box structure. On the other hand, it reduces heat conduction between the box frame and the liquid cooling plate, as well as between the liquid cooling plate and the bottom protective plate, effectively insulating the liquid cooling plate and the box frame to avoid large temperature changes.

[0024] 2. This utility model enhances the heat insulation performance by installing heat-insulating foam in the inner cavity of the bottom protective plate, thereby further blocking the heat transfer between the liquid cooling plate and the bottom protective plate.

[0025] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A bottom schematic diagram of the box structure of this utility model is shown;

[0028] Figure 2 An exploded view of the box structure of this utility model is shown.

[0029] In the diagram: 1. Box body; 2. First bolt; 3. Bottom guard plate; 4. Thermal insulation foam; 5. First sealing rivet nut; 6. First foamed silicone foam; 7. Second bolt; 8. Second sealing rivet nut; 9. Second foamed silicone foam; 10. Box body frame; 11. Liquid cooling plate. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] like Figure 1 As shown, a box structure includes a box 1, combined with... Figure 2 It is known that the enclosure 1 includes a bottom protective plate 3, a first foamed silicone foam 6, a liquid cooling plate 11, a second foamed silicone foam 9, and an enclosure frame 10 connected in sequence. A battery pack can be installed inside the enclosure frame 10. The function of the first foamed silicone foam 6 is to improve the sealing between the bottom protective plate 3 and the liquid cooling plate 11, and the function of the second foamed silicone foam 9 is to improve the sealing between the liquid cooling plate 11 and the enclosure frame 10.

[0032] It should be noted that the first foamed silicone foam 6 and the second foamed silicone foam 9, in addition to improving sealing, also reduce the thermal conductivity rate, thus reducing heat transfer between the casing frame 10 and the liquid cooling plate 11, as well as between the liquid cooling plate 11 and the bottom protective plate 3. Furthermore, during installation, the first foamed silicone foam 6 and the second foamed silicone foam 9 can provide some auxiliary positioning, helping the liquid cooling plate 11 to better align and assemble with the casing frame 10 (and the bottom protective plate 3 and the liquid cooling plate 11), enhancing structural stability.

[0033] It should be further noted that the thickness of the first foamed silicone foam 6 is 10±2mm, preferably 10±0.1mm, and the thickness of the second foamed silicone foam 9 is 5±1mm, preferably 5±0.1mm. Additionally, the bottom protective plate 3, the cabinet frame 10, and the liquid cooling plate 11 can be made of aluminum alloy. Aluminum alloy has a high strength-to-weight ratio, which can effectively reduce the weight of the entire cabinet 1 while ensuring sufficient strength and rigidity of the cabinet structure. This facilitates installation, transportation, and use, and is particularly suitable for equipment or scenarios where weight is a constraint.

[0034] As a preferred embodiment, the bottom protective plate 3 has an inner cavity on the surface facing the first foamed silicone foam 6, and thermal insulation foam 4 is installed in the inner cavity. The thermal insulation foam 4 can further block the heat transfer between the liquid cooling plate 11 and the bottom protective plate 3, and further enhance its thermal insulation performance.

[0035] Furthermore, the bottom protective plate 3, the first foamed silicone foam 6, and the liquid cooling plate 11 are sequentially and sealed together. Specifically, a first sealing rivet nut 5 is fixedly installed on the surface of the liquid cooling plate 11. The first sealing rivet nut 5 can cooperate with the first bolt 2. The first bolt 2 can pass through the bottom protective plate 3 and the first foamed silicone foam 6 in sequence, and then be sealed together with the first sealing rivet nut 5.

[0036] It should be noted that during installation, a rivet gun can be used to fix the first sealing rivet nut 5 to the surface of the liquid cooling plate 11, ensuring a tight fit. Next, place the first foamed silicone foam 6 between the bottom cover plate 3 and the liquid cooling plate 11, positioning it for connection. Finally, pass the first bolt 2 through the corresponding mounting hole on the bottom cover plate 3, then through the first foamed silicone foam 6, and finally connect it to the pre-installed first sealing rivet nut 5 on the liquid cooling plate 11. Using a wrench or similar tool, tighten the first bolt 2 to the specified torque value, ensuring a tight connection between the bottom cover plate 3, the first foamed silicone foam 6, and the liquid cooling plate 11 to achieve a seal. During tightening, ensure even pressure to avoid uneven force that could lead to a poor seal or damage to components.

[0037] Furthermore, during assembly, the liquid cooling plate 11, the second foamed silicone foam 9, and the housing frame 10 are sequentially sealed together. Specifically, a second sealing rivet nut 8 is installed on the surface of the housing frame 10, ensuring a tight fit. Then, a second bolt 7 is installed at the corresponding position on the liquid cooling plate 11. During assembly, the second bolt 7 originates from one side of the liquid cooling plate 11, passes through the liquid cooling plate 11 and the second foamed silicone foam 9, and aligns with and tightens the second sealing rivet nut 8 already installed on the surface of the housing frame 10, thus achieving a sealed connection. This connection method ensures that the liquid cooling plate 11 and the housing frame 10 are tightly fitted together via the second foamed silicone foam 9, guaranteeing not only structural stability but also further improving sealing performance by utilizing the properties of the second foamed silicone foam 9.

[0038] It should be noted that, Figure 1 and Figure 2 The structure integrates the box frame 10, liquid cooling plate 11 and bottom guard plate 3 into a unified solution, and uses bolts and rivets to connect them, reducing process costs and the types and quantities of parts, which can effectively improve the product's economy.

[0039] A battery pack is installed in the aforementioned housing structure, specifically in the housing frame 10. By employing this housing structure, the battery pack, through the action of the insulating foam 4, the first foamed silicone foam 6, and the second foamed silicone foam 9, can improve the sealing of the housing structure and reduce heat conduction between the housing frame 10 and the liquid cooling plate 11, as well as between the liquid cooling plate 11 and the bottom protective plate 3. This allows the ambient temperature around the battery pack to remain stable, preventing large temperature fluctuations.

[0040] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A box structure, characterized by, Includes the housing (1); The enclosure (1) includes a bottom protective plate (3), a first foamed silicone foam (6), a liquid cooling plate (11), a second foamed silicone foam (9), and an enclosure frame (10) connected in sequence.

2. A box structure according to claim 1, characterized in that The bottom protective plate (3), the first foamed silicone foam (6), and the liquid cooling plate (11) are sequentially and sealed together.

3. A box structure according to claim 2, wherein It also includes a first bolt (2) and a first sealing rivet nut (5); The first sealing rivet nut (5) is fixedly installed on the surface of the liquid cooling plate (11); The first bolt (2) passes through the bottom protective plate (3) and the first foamed silicone foam (6) in sequence, and is sealed to the first sealing rivet nut (5).

4. The box structure of claim 2, wherein The bottom protective plate (3) has an inner cavity on the surface facing the first foamed silicone foam (6), and thermal insulation foam (4) is installed in the inner cavity.

5. The box structure of claim 1, wherein The liquid cooling plate (11), the second foamed silicone foam (9), and the box frame (10) are sequentially sealed and connected.

6. A box structure according to claim 5, wherein It also includes a second bolt (7) and a second sealing rivet nut (8); The second sealing rivet nut (8) is fixedly installed on the surface of the box frame (10); The second bolt (7) passes through the liquid cooling plate (11) and the second foamed silicone foam (9) in sequence, and is sealed to the second sealing rivet nut (8).

7. A box structure according to any one of claims 1-6, characterized in that The thickness of the first foamed silicone foam (6) is 10±2mm.

8. A box structure according to any one of claims 1-6, characterized in that, The thickness of the second foamed silicone foam (9) is 5±1mm.

9. A box structure according to any one of claims 1-6, characterized in that, The bottom protective plate (3), the box frame (10) and the liquid cooling plate (11) are made of aluminum alloy.

10. A battery pack, characterized in that, Installed in the housing structure as described in any one of claims 1-9.

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