Battery pack shell, battery pack and electric equipment
By using limiting parts and sealing parts with elastic deformation capabilities in the battery pack housing, combined with sealing grease, the problem of micro leakage in the sealing structure is solved, the waterproof performance and connection strength of the battery pack housing are improved, and the lightweight Quantitative design.
Patent Information
- Application Number
- CN202323493409.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-20
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2033-12-20
AI Technical Summary
The sealing structure of the existing battery pack housing has microscopic gaps, which leads to micro leakage and affects the waterproofing effect.
The limiting parts and seals with elastic deformation capabilities are adopted. The limiting parts are placed between the edges of the shell to form a sealing structure, and the connection strength is enhanced through the connecting components, and the sealing waterproof effect is improved by using the elastic deformation capabilities of the seal. Coat sealing grease to fill the gaps on the contact surfaces to enhance sealing performance.
It reduces the housing gap, prevents seals from squirting, improves the waterproof performance and connection strength of the battery pack housing, enhances the protection level, and reduces manufacturing cost and weight while ensuring performance.
Smart Images
Figure CN222261246U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of energy storage technology, and in particular to a battery pack housing, a battery pack and an electrical device. Background Art
[0002] The battery pack is one of the core components of electric vehicles and other electrical equipment. Improper waterproofing of the battery pack may cause safety accidents such as fire and explosion. Therefore, the sealing and waterproofing performance of the battery pack should meet safety requirements. In addition to the sealing performance of the relevant structural parts themselves, the installation interface of each component, especially the sealing structure of the upper and lower shells, is crucial to achieve the sealing requirements of the battery pack.
[0003] In the prior art, most battery packs have rubber pads between the upper and lower shells to achieve a sealed connection between the two. However, the rubber pads have a large compression rebound force, and the rubber pads and the upper and lower shells are pressed together in contact. There are microscopic gaps on the contact surfaces, which can easily cause micro-leakage and affect the waterproof effect of the battery pack. Utility Model Content
[0004] In view of this, the present application provides a battery pack shell, a battery pack and an electrical device to improve the sealing and waterproof effect of the battery pack shell.
[0005] Specifically, the following technical solutions are included:
[0006] In a first aspect, the present application provides a battery pack housing, comprising:
[0007] The shell body comprises a first shell and a second shell which are arranged opposite to each other, wherein the edge of the first shell is provided with a first flange, and the edge of the second shell is provided with a second flange;
[0008] A sealing assembly, comprising a stopper and a sealing member, wherein the stopper is annular and is cushioned between the first flange and the second flange, the stopper is provided with a first through hole, the sealing member is embedded in the first through hole, the stopper and the sealing member both have elastic deformation capability, and the rigidity of the stopper is greater than the rigidity of the sealing member;
[0009] A connecting component is inserted into the sealing member to connect the first flange and the second flange.
[0010] In this embodiment, the limiter is padded between the first flange and the second flange, so that the limiter having greater rigidity than the seal is tightly fitted with the first flange and the second flange to form a sealing structure, reducing the gap between the first flange and the second flange. At the same time, the limiter can prevent the seal from being over-compressed and prevent the seal from moving during installation. By inserting the connecting component into the seal with less rigidity, the elastic deformation ability of the seal is used to enhance the connection strength between the connecting component and the first flange and the second flange, thereby improving the sealing and waterproof effect and enhancing the waterproof performance of the battery pack shell.
[0011] In a possible implementation, there are a plurality of the first through holes and the sealing members, the first through holes are spaced apart along the circumference of the limiting member, and the sealing members are disposed in a one-to-one correspondence with the first through holes.
[0012] Through the above arrangement, the connection strength and sealing performance of the battery pack shell at all circumferences are guaranteed.
[0013] In a possible implementation, sealing grease is coated between the first flange and the sealing assembly.
[0014] Through the above arrangement, the sealing grease is applied to fill the microscopic gap between the contact surface of the first flange and the sealing assembly, and the sealing and waterproof performance of the battery pack shell is enhanced by utilizing the tension generated by the incompatibility between the sealing grease and water molecules.
[0015] In a possible implementation, the connecting assembly includes a threaded fastener and a nut, the sealing member is provided with a second through hole, the first flange and the second flange are both provided with connecting holes, the threaded fastener is passed through the second through hole and the connecting hole, one end of the threaded fastener abuts against the first flange, the nut is threadedly connected to the other end of the threaded fastener, and the nut abuts against the second flange.
[0016] Through the above-mentioned arrangement, the threads of the threaded fastener are sealed and isolated from the sealing surface, ensuring that water cannot penetrate through the thread gap, so that the plane outside the threaded fastener becomes an effective sealing plane, which is equivalent to widening the effective sealing plane, which is beneficial to improving the protection level of the battery pack shell, or while ensuring the protection level of the battery pack shell, the width of the first flange and the second flange can be reduced, thereby reducing the manufacturing cost and weight of the battery pack shell, which is beneficial to achieving a lightweight design of the battery pack shell.
[0017] In a possible implementation, the nut includes a connected bushing portion and a guide portion, the guide portion is inserted into the connecting hole of the second flange, and the bushing portion is sleeved on the threaded fastener and abuts against the second flange.
[0018] Through the above arrangement, the guide portion can be inserted into the connecting hole of the second flange and abut against the seal, thereby eliminating the gap between the thread of the threaded fastener and the connecting hole of the second flange. The step formed by the bushing portion and the guide portion can abut against the surface of the second flange facing away from the first flange, preventing the guide portion from excessively extending into the connecting hole and causing the sealing assembly to be lifted up and produce a gap.
[0019] In a possible implementation, the position limiting member and the sealing member are both non-metallic members. Through the above arrangement, the sealing performance of the battery pack shell is improved while the production cost is reduced.
[0020] In a possible implementation, the sealing member is connected to the limiting member by bonding. Through the above arrangement, the sealing member and the limiting member are fixedly connected, and the sealing and waterproof performance of the sealing assembly is improved.
[0021] In a possible implementation, the second flange is connected to the sealing assembly by bonding.
[0022] In a second aspect, the present application provides a battery pack, comprising the battery pack shell provided by any embodiment of the first aspect.
[0023] In a third aspect, the present application provides an electrical device, comprising the battery pack provided in the second aspect, wherein the battery pack is used to supply power to the electrical device.
[0024] The beneficial effects of the technical solution provided in the embodiment of the present application include at least: by setting a sealing component including a limiter and a seal with elastic deformation ability, the limiter is padded between the first flange and the second flange, so that the limiter with greater rigidity relative to the seal is tightly fitted with the first flange and the second flange to form a sealing structure, reducing the gap between the first flange and the second flange, and at the same time the limiter can prevent the seal from being over-compressed and prevent the seal from moving during installation; by inserting the connecting component into the seal with less rigidity, the elastic deformation ability of the seal is used to enhance the connection strength between the connecting component and the first flange and the second flange, thereby improving the sealing and waterproof effect and enhancing the waterproof performance of the battery pack shell. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0026] Figure 1 A partial cross-sectional view of a battery pack housing provided in an embodiment of the present application;
[0027] Figure 2 A top view of the battery pack shell provided in an embodiment of the present application.
[0028] The reference numerals in the figures represent respectively:
[0029] 11-first flange; 12-second flange; 21-limiting member; 22-sealing member; 3-connecting assembly; 31-threaded fastener; 32-nut; 321-bushing part; 322-guide part; 4-sealing grease.
[0030] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION
[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0032] The directional nouns involved in the embodiments of the present application, such as "upper", "lower", "outer", etc., are generally represented by Figure 1 The relative relationship of the orientation shown in the figure is used as the basis, and these orientation terms are used only to more clearly describe the relationship between structures, not to describe absolute orientation. When the product is placed in different postures, the orientation may change, for example, "up" and "down" may be interchangeable.
[0033] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meanings as those generally understood by those of ordinary skill in the art. Some technical terms appearing in the embodiments of the present application are explained below.
[0034] In order to make the technical solutions and advantages of the present application more clear, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.
[0035] like Figure 1 and Figure 2 As shown, the battery pack shell provided in the embodiment of the present application includes a shell body, a sealing assembly and a connecting assembly 3.
[0036] The shell body includes a first shell and a second shell that are arranged opposite to each other, and the edge of the first shell is provided with a first flange 11, and the edge of the second shell is provided with a second flange 12. Exemplarily, the first shell cover is arranged above the second shell, and the first shell and the second shell are arranged to form a receiving cavity, and the receiving cavity is used to accommodate the battery cell. The first flange 11 is arranged in a ring shape around the edge of the first shell, and the second flange 12 is arranged in a ring shape around the edge of the second shell. The first flange 11 and the second flange 12 both extend from the inner side of the shell body to the outer side, and the first flange 11 and the first flange 11 abut against each other so that the first shell and the second shell are connected.
[0037] The sealing assembly includes a limit member 21 and a sealing member 22. The limit member 21 is annular and is arranged between the first flange 11 and the second flange 12. The limit member 21 is provided with a first through hole, and the sealing member 22 is embedded in the first through hole. The limit member 21 and the sealing member 22 both have elastic deformation capabilities, and the stiffness of the limit member 21 is greater than the stiffness of the sealing member 22.
[0038] The shape and size of the limiter 21 and the first flange 11 and the second flange 12 are adapted to fully fill the gap between the first flange 11 and the second flange 12. The limiter 21 and the seal 22 can both produce elastic deformation along their own thickness direction. The first through hole penetrates the limiter 21 along the thickness direction of the limiter 21. The seal 22 is located in the first through hole and is fixedly connected to the limiter 21 to prevent the seal 22 from moving during installation. The thickness of the limiter 21 and the seal 22 are equal to prevent the formation of gaps between the sealing assembly and the first flange 11 and the second flange 12, which affects the sealing and waterproof performance of the battery pack shell.
[0039] On the one hand, the limiter 21 with elastic deformation ability can provide buffering protection for the first flange 11 and the second flange 12. On the other hand, the limiter 21 has a large rigidity and can avoid excessive compression of itself, which is conducive to achieving full fit between the limiter 21 and the first flange 11 and the second flange 12, reducing the gap and forming a sealing structure.
[0040] The connection component 3 is inserted into the seal 22 to connect the first flange 11 and the second flange 12. Specifically, the connection component is inserted into the seal 22 along the thickness direction of the seal 22, and the seal 22 is sleeved on the outer periphery of the connection component 3. The elastic deformation ability of the seal 22 is used to make the connection component 3 press the seal 22, thereby enhancing the connection strength and sealing effect of the first flange 11 and the second flange 12. Optionally, the connection component 3 may include threaded parts such as bolts and screws and threaded mating parts such as nuts and nuts 32 to achieve reliable connection between the first flange 11 and the second flange 12.
[0041] Since the limit member 21 is respectively in contact with the first flange 11 and the second flange 12, when the connecting assembly 3 includes a threaded member, the thread and the sealing surface are sealed and isolated to ensure that water cannot penetrate through the thread gap, thereby increasing the effective sealing plane, which is beneficial to improving the protection level of the battery pack shell. Alternatively, while ensuring the protection level of the battery pack shell, the width of the first flange 11 and the second flange 12 can be reduced, thereby reducing the manufacturing cost and weight of the battery pack shell, which is beneficial to achieving a lightweight design of the battery pack shell.
[0042] The battery pack shell provided in the embodiment of the present application is provided with a sealing assembly including a limit member 21 and a seal 22 with elastic deformation ability, and the limit member 21 is padded between the first flange 11 and the second flange 12, so that the limit member 21 with greater rigidity relative to the seal 22 is tightly fitted with the first flange 11 and the second flange 12 to form a sealing structure, thereby reducing the gap between the first flange 11 and the second flange 12. At the same time, the limit member 21 can prevent the seal 22 from being over-compressed and prevent the seal 22 from moving during the installation process; by inserting the connecting assembly 3 into the seal 22 with smaller rigidity, the elastic deformation ability of the seal 22 is utilized to enhance the connection strength between the connecting assembly 3 and the first flange 11 and the second flange 12, thereby improving the sealing and waterproof effect and enhancing the waterproof performance of the battery pack shell.
[0043] In a specific embodiment, there are multiple first through holes and seals 22, the first through holes are spaced apart along the circumference of the stopper 21, and the seals 22 are arranged one by one with the first through holes. It is understandable that there are also multiple connecting components 3, and each connecting component 3 is connected with the seal 22. Optionally, multiple first through holes are evenly distributed along the circumference of the stopper 21. For example, when the cross-section of the battery pack shell is rectangular, multiple first through holes arranged along the length direction of the battery pack and multiple first through holes along the width direction of the battery pack are evenly spaced apart, respectively, to ensure the connection strength and sealing performance of the battery pack shell at various locations around the circumference.
[0044] Optionally, sealing grease 4 is coated between the first flange 11 and the sealing assembly. The sealing grease 4 is applied to fill the microscopic gap between the contact surface of the first flange 11 and the sealing assembly, and the sealing and waterproof performance of the battery pack shell is enhanced by utilizing the tension generated by the incompatibility between the sealing grease 4 and water molecules.
[0045] Based on any of the above embodiments, the connecting assembly 3 includes a threaded fastener 31 and a nut 32, the seal 22 is provided with a second through hole, the first flange 11 and the second flange 12 are both provided with connecting holes, the threaded fastener 31 is passed through the second through hole and the connecting hole, one end of the threaded fastener 31 is abutted against the first flange 11, the nut 32 is threadedly connected to the other end of the threaded fastener 31, and the nut 32 is abutted against the second flange 12.
[0046] like Figure 1 As shown, the threaded fastener 31 is a hexagonal bolt, the head of the threaded fastener 31 is located on the side where the first shell is located, the threaded fastener 31 passes through the connecting hole and the second through hole, and the nut 32 is on the side where the second shell is located and is threadedly connected with the tail of the threaded fastener 31. The head of the threaded fastener 31 abuts against the first flange 11, and the nut 32 abuts against the second flange 12 to limit the threaded fastener 31 in the length direction, ensuring that the first flange 11 and the second flange 12 are reliably connected.
[0047] Optionally, the number of the threaded fasteners 31 and the nut 32 are both multiple, such as Figure 2 As shown, when the cross-section of the battery pack shell is rectangular, multiple threaded fasteners 31 arranged along the length direction of the battery pack and multiple threaded fasteners 31 along the width direction of the battery pack are evenly spaced apart to ensure the connection strength and sealing performance of the battery pack shell at all circumferential locations.
[0048] Optionally, the threaded fastener 31 and the nut 32 are tightened with a set torque to ensure that the distance between the first flange 11 and the second flange 12 reaches a set value, and the compression ratio of the seals 22 corresponding to each group of connecting components 3 remains consistent, thereby improving the connection reliability of the first flange 11 and the second flange 12.
[0049] Since the stopper 21 is disposed between the first flange 11 and the second flange 12, and the threaded fastener 31 is inserted into the seal 22, the thread of the threaded fastener 31 can be sealed and isolated from the sealing surface, ensuring that water cannot penetrate from the thread gap, so that the plane outside the threaded fastener 31 becomes an effective sealing plane, which is equivalent to widening the effective sealing plane, which is beneficial to improving the protection level of the battery pack shell, or while ensuring the protection level of the battery pack shell, the width of the first flange 11 and the second flange 12 can be reduced, reducing the manufacturing cost and weight of the battery pack shell, which is beneficial to achieving a lightweight design of the battery pack shell. Since the seal 22 has elastic deformation ability and low rigidity, the tighter the threaded fastener and the nut 32 are tightened, the better the connection strength and waterproof performance.
[0050] Furthermore, the nut 32 is a self-clinching nut, and the nut 32 includes a connected bushing portion 321 and a guide portion 322 , the guide portion 322 is inserted into the connecting hole of the second flange 12 , and the bushing portion 321 is sleeved on the threaded fastener 31 and abuts against the second flange 12 .
[0051] The bushing part 321 is cylindrical and has an inner cavity. The guide part 322 is arranged around the opening of the bushing part 321. The outer diameter of the guide part 322 is smaller than the outer diameter of the bushing part 321, so as to form a step at the connection between the bushing part 321 and the guide part 322. The threaded fastener 31 is inserted into the inner cavity of the bushing part 321, which reduces the gap between the threaded fastener 31 and the nut 32, and is conducive to improving the sealing between the two. The guide part 322 can be inserted into the connection hole of the second flange 12 and abut against the sealing member 22, which can eliminate the gap between the thread of the threaded fastener 31 and the connection hole of the second flange 12. The step formed by the bushing part 321 and the guide part 322 can abut against the surface of the second flange 12 away from the first flange 11, preventing the guide part 322 from excessively extending into the connection hole, causing the sealing component to be lifted up and generating a gap.
[0052] Optionally, both the stopper 21 and the seal 22 are non-metallic parts, for example, both the stopper 21 and the seal 22 are made of rubber with a surface hardness lower than that of metal materials, the stopper 21 is made of hard rubber, and the rigidity and surface hardness of the seal 22 are lower than those of the stopper 21. By setting the stopper 21 and the seal 22 to be non-metallic parts, the sealing performance of the battery pack shell is improved while the production cost is reduced.
[0053] Optionally, the sealing member 22 and the limiting member 21 are connected by bonding, for example, the sealing member 22 and the limiting member 21 can be connected by a waterproof adhesive, which can improve the sealing and waterproof performance of the sealing assembly while fixing the sealing member 22 and the limiting member 21.
[0054] Optionally, the second flange 12 is connected to the sealing assembly by bonding. Exemplarily, the assembly process of the battery pack shell includes: bonding the sealing assembly to the surface of the second flange 12 close to the first flange 11; applying sealing grease 4 on the surface of the sealing assembly away from the second flange 12; placing the first shell cover on the second shell, aligning the connection hole of the first flange 11 with the connection hole of the second flange 12; inserting the guide portion 322 of the nut 32 into the connection hole of the second flange 12 in the direction from the second shell to the first shell; inserting the threaded fitting into the connection hole of the first flange 11, the second flange 12 of the seal 22, and the connection hole of the second flange 12 from the side where the first shell is located, and tightening the threaded fitting and the nut 32 according to the set torque so that the spacing between the first flange 11 and the second flange 12 reaches the set value.
[0055] The present application also provides a battery pack, comprising the battery pack housing provided by any of the above embodiments.
[0056] The present application also provides an electric device, including the battery pack provided in the above embodiment, and the battery pack is used to power the electric device. The electric device may be, but is not limited to, an electric tool, an electric bicycle, an electric motorcycle, an electric car, a ship, a spacecraft, etc. Among them, electric toys may include fixed or mobile electric toys, for example, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, etc.
[0057] In the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.
[0058] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the present application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only.
[0059] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.
Claims
1. A battery pack housing, characterized in that: include: The shell body comprises a first shell and a second shell arranged opposite to each other, wherein the edge of the first shell is provided with a first flange (11), and the edge of the second shell is provided with a second flange (12); A sealing component, comprising a stopper (21) and a sealing component (22), wherein the stopper (21) is annular and is cushioned between the first flange (11) and the second flange (12), the stopper (21) is provided with a first through hole, the sealing component (22) is embedded in the first through hole, the stopper (21) and the sealing component (22) both have elastic deformation capability, and the rigidity of the stopper (21) is greater than the rigidity of the sealing component (22); A connecting assembly (3) is inserted into the sealing member (22) to connect the first flange (11) and the second flange (12).
2. The battery pack housing according to claim 1, characterized in that: There are a plurality of the first through holes and the sealing members (22); the first through holes are spaced apart along the circumference of the limiting member (21); and the sealing members (22) are arranged in a one-to-one correspondence with the first through holes.
3. The battery pack housing according to claim 1, characterized in that: Sealing grease (4) is coated between the first flange (11) and the sealing component.
4. The battery pack casing according to any one of claims 1 to 3, characterized in that: The connection assembly (3) comprises a threaded fastener (31) and a nut (32); the sealing member (22) is provided with a second through hole; the first flange (11) and the second flange (12) are both provided with connection holes; the threaded fastener (31) is passed through the second through hole and the connection hole; one end of the threaded fastener (31) is in contact with the first flange (11); the nut (32) is threadedly connected to the other end of the threaded fastener (31); and the nut (32) is in contact with the second flange (12).
5. The battery pack housing according to claim 4, characterized in that: The nut (32) comprises a connected bushing portion (321) and a guide portion (322), wherein the guide portion (322) is inserted into the connecting hole of the second flange (12), and the bushing portion (321) is sleeved on the threaded fastener (31) and abuts against the second flange (12).
6. The battery pack housing according to claim 1, characterized in that: The limiting component (21) and the sealing component (22) are both non-metallic components.
7. The battery pack housing according to claim 1, characterized in that: The sealing member (22) is connected to the limiting member (21) by bonding.
8. The battery pack casing according to claim 1, characterized in that: The second flange (12) is connected to the sealing component by bonding.
9. A battery pack, characterized in that: A battery pack casing comprising the battery pack casing according to any one of claims 1 to 8.
10. An electrical device, characterized in that: The battery pack comprises the battery pack as claimed in claim 9, wherein the battery pack is used to supply power to the electrical device.