Battery box body and battery pack
By providing an annular projection on the first box of the battery box and using it in conjunction with the installation holes of the sealing member and the second box, the problem of the existing battery box sealing structure requiring additional limiting parts is solved, and higher sealing and lower production costs are achieved.
Patent Information
- Application Number
- CN202420383230.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-28
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-02-28
AI Technical Summary
The existing battery box sealing structure requires additional limiting parts to be fixed, and limiting parts are prone to inaccurate alignment and displacement during installation and disassembly, which increases production costs.
A battery box is designed, by providing an annular projection on the first box and providing corresponding mounting holes on the seal and the second box, the annular projection passes through the installation hole on the seal and abuts on the second box, and achieving a fastening connection between the first box and the seal is avoided, and the use of additional limiting parts is avoided.
Improves the sealing of battery box assembly, simplifies the installation process, reduces production costs, and improves the problems of inaccurate alignment and displacement.
Smart Images
Figure CN222546520U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of batteries, and in particular relates to a battery box and a battery pack. Background Art
[0002] The sealing of the battery is crucial to the safety of the battery. Usually, a sealing gasket is required to seal the battery box to enhance the sealing of the battery box. In the prior art, the box sealing structure of the battery includes an upper box, a lower box, and a seal placed between the upper box and the lower box, which are then connected and locked by bolts. The bolts compress the seal during the locking process to achieve the sealing function of the box sealing structure. When the seal is compressed, if the compression is too small, the sealing effect is not good. If the compression is too large, it is easy to cause the seal to fail. In order to solve these problems, a limiter is often added to the box sealing structure to control the compression of the seal. The limiter usually used is a gasket, and the compression of the seal is controlled by the gasket. Although this method can control the compression of the seal, the gasket is easy to fall off during installation and disassembly, and additional measures need to be taken to fix the limiter gasket. The additional limiter gasket is prone to misalignment and displacement during the fixing process, and is not conducive to saving production costs. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a battery box and a battery pack in view of the problem that the sealing of the battery box in the prior art not only requires additional limiting parts for fixing, but also the additional limiting parts are not conducive to disassembly and increase costs.
[0004] The technical solution adopted by the utility model to solve the above technical problems is as follows:
[0005] A battery case is provided, comprising a first case, a second case, a sealing member and a fastener, wherein the edges of the first case and the second case are joined to form a sealed cavity, the sealing member is located at the edge joining position of the first case and the second case, a first mounting hole is provided on the first case, an inner edge of the first mounting hole is folded toward the direction of the second case to form an annular protrusion, a second mounting hole is provided on the sealing member at a position corresponding to the first mounting hole, a third mounting hole is provided on the second case at a position corresponding to the first mounting hole, the annular protrusion passes through the second mounting hole and abuts against the second case, and the fastener passes through the first mounting hole, the annular protrusion and the third mounting hole in sequence to connect the first case and the second case.
[0006] Optionally, the shape of the annular protrusion is approximately cylindrical, and the outer diameter of the annular protrusion is less than or equal to the diameter of the second mounting hole.
[0007] Optionally, the inner diameter of the annular protrusion is greater than or equal to the diameter of the third mounting hole.
[0008] Optionally, the seal is an elastic structural member, and the length of the annular protrusion in the thickness direction of the seal is smaller than the initial thickness of the seal.
[0009] Optionally, the annular protrusion and the first box body are an integrally formed structural component.
[0010] Optionally, the number of the first mounting holes is multiple, and correspondingly, the number of the annular protrusions, the second mounting holes, the third mounting holes and the fasteners are also multiple, and the multiple first mounting holes, the multiple annular protrusions, the multiple second mounting holes, the multiple third mounting holes and the multiple fasteners are arranged in one-to-one correspondence.
[0011] Optionally, the first box body includes a first protrusion and a first eaves surrounding the outer periphery of the first protrusion, the first protrusion protrudes in a direction away from the second box body, and a plurality of first mounting holes are surrounded and spaced apart on the first eaves, the second box body includes a second protrusion and a second eaves surrounding the outer periphery of the second protrusion, the second protrusion protrudes in a direction away from the first box body, and a plurality of third mounting holes are surrounded and spaced apart on the second eaves, and the seal is an annular sheet, and the seal is clamped between the first eaves and the second eaves.
[0012] Optionally, the fastener is a fastening bolt, which includes a bolt body, a nut and a gasket, wherein the gasket is located on the side of the first mounting hole away from the seal, the bolt body passes through the gasket, the first mounting hole, the annular protrusion and the third mounting hole in sequence and protrudes from the third mounting hole, and the nut is sleeved on the part of the bolt body protruding from the third mounting hole.
[0013] Optionally, the inner diameter of the first mounting hole, the inner diameter of the second mounting hole, and the inner diameter of the third mounting hole are all greater than or equal to the diameter of the bolt body.
[0014] On the other hand, the utility model provides a battery pack, including a battery cell and the battery box, at least one of the battery cells is placed in the battery box.
[0015] The battery case provided by the utility model is provided with a first case, a second case and a sealing member, and the inner edge of the first mounting hole on the first case is provided with an annular protrusion. During assembly of the battery case, the annular protrusion passes through the second mounting hole on the sealing member and abuts against the second case. Without adding an additional sealing member limiting structure, the annular protrusion can be used to achieve a fastening connection between the first case and the sealing member, thereby improving the sealing performance of the assembly of the first case and the second case, and is also conducive to improving the problems of misalignment and displacement of the first case and the sealing member during the installation process. That is, the battery case described in the present application not only ensures the sealing performance and the limiting and fastening effect of the sealing member, but also helps to reduce production costs and improve assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the first box structure provided by the utility model;
[0017] Figure 2 yes Figure 1 Dorsal view of;
[0018] Figure 3 This is an exploded view of the battery box provided by the utility model;
[0019] Figure 4 This is the front view of the battery box provided by the utility model;
[0020] Figure 5 This is a left view of the battery box provided by the utility model;
[0021] Figure 6 yes Figure 5 The cross-section view after cutting along the AA line;
[0022] Figure 7 yes Figure 6 An enlarged view of part B in FIG.
[0023] Figure 8 yes Figure 7 An enlarged view of the first mounting hole in FIG.
[0024] Fig. 9 This is a front view of a battery box provided by an embodiment of the utility model;
[0025] Fig.10 This is a left side view of a battery box provided by an embodiment of the utility model;
[0026] Fig.11 yes Fig.10 The cross-section view after cutting along the AA line;
[0027] Fig.12 yes Fig.11 Magnified view of part B.
[0028] The reference numerals in the drawings of the specification are as follows:
[0029] 1. First box body; 11. First mounting hole; 111. Annular protrusion; 2. Sealing member; 21. Second mounting hole; 3. First protrusion; 4. First eave; 5. Fastener; 51. Bolt body; 52. Nut; 53. Gasket; 6. Second box body; 61. Third mounting hole; 7. Second protrusion; 8. Second eave. DETAILED DESCRIPTION
[0030] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0031] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.
[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0033] Reference Figures 1 to 3The utility model embodiment provides a battery case, comprising a first case 1, a second case 6, a sealing member 2 and a fastener 5, wherein the edges of the first case 1 and the second case 6 are joined to form a sealed cavity, the sealing member 2 is located at the edge joining position of the first case 1 and the second case 6, a first mounting hole 11 is provided on the first case 1, the inner edge of the first mounting hole 11 is folded toward the direction of the second case 6 to form an annular protrusion 111, a second mounting hole 21 is provided on the sealing member 2 at a position corresponding to the first mounting hole 11, a third mounting hole 61 is provided at a position corresponding to the first mounting hole 11 of the second case 6, the annular protrusion 111 passes through the second mounting hole 21 and abuts against the second case 6, and the fastener 5 passes through the first mounting hole 11, the annular protrusion 111 and the third mounting hole 61 in sequence to connect the first case 1 and the second case 6.
[0034] It should be noted that the box structure seals usually need to be limited, otherwise excessive compression by external force during the box assembly process will easily accelerate the aging of the seals. The current limiting methods mostly use additional limiters (usually gaskets). Although this method can control the compression amount of the seals, the additional limiters are prone to falling off, misalignment and displacement during the fixing process, and increase related costs.
[0035] Specifically, the battery box provided by the utility model is provided with a first box body 1, a second box body 6 and a sealing member 2, and the inner edge of the first mounting hole 11 on the first box body 1 has an annular protrusion 111 ( Figure 8 ), in the assembly of the battery case, the annular protrusion 111 passes through the second mounting hole 21 on the seal 2 and abuts against the second case 6. Without adding an additional limiting structure of the seal 2, the annular protrusion 111 can be used to achieve a fastening connection between the first case 1 and the seal 2, thereby improving the sealing of the assembly of the first case 1 and the second case 6, and is also beneficial to improving the alignment and displacement problems of the first case 1 and the seal 2 during the installation process; that is, the battery case described in the present application not only ensures the limiting and fastening function of the seal 2, but also helps to reduce production costs and improve assembly efficiency.
[0036] In one embodiment, the shape of the annular protrusion 111 is approximately cylindrical, and the outer diameter of the annular protrusion 111 is less than or equal to the diameter of the second mounting hole 21 .
[0037] It should be noted that the annular protrusion 111 corresponds to the second mounting hole 21, and the annular protrusion 111 is adaptably connected to the second mounting hole 21. Therefore, the outer diameter of the annular protrusion 111 in the present application is set to be no larger than the diameter of the second mounting hole 21, which is conducive to the smooth insertion of the annular protrusion 111 into the second mounting hole 21 during the assembly process.
[0038] In one embodiment, the inner diameter of the annular protrusion 111 is greater than or equal to the diameter of the third mounting hole 61 .
[0039] Specifically, after the annular protrusion 111 is assembled with the second mounting hole 21, it moves toward the second box body 6 under the action of external force until the annular protrusion 111 contacts the second box body 6, and a better sealing effect is achieved at this time; if the inner diameter of the annular protrusion 111 is smaller than the third mounting hole 61, the compression amount of the seal 2 cannot be quantitatively, stably and reliably controlled at this time. If the compression amount is too small, the sealing effect is not good. If the compression amount is too large, the seal 2 is prone to cracking or crushing during the locking and sealing process, thereby affecting the sealing effect. That is, in the present application, the inner diameter of the annular protrusion 111 is set to ≥ the diameter of the third mounting hole 61, which can effectively avoid the above problems.
[0040] In one embodiment, the sealing member 2 is an elastic structural member, and the length of the annular protrusion 111 in the thickness direction of the sealing member 2 is smaller than the initial thickness of the sealing member 2 .
[0041] It should be noted that if the annular protrusion 111 is too long, the sealing between the first box body 1 and the seal 2 will be affected during the assembly of the battery box body. If the annular protrusion 111 is too short, the seal 2 will be easily damaged during the compression assembly, resulting in the seal being unable to be used reliably for a long time. In addition, since the seal 2 is an elastic structural component, when the length of the annular protrusion 111 in the thickness direction of the seal 2 is greater than the initial thickness of the seal 2, the sealing effect of the seal 2 cannot be exerted, which also affects the fastening effect between the first box body 1 and the second box body 6.
[0042] Specifically, in the present invention, the length of the annular protrusion 111 in the thickness direction of the seal 2 is set to be smaller than the initial thickness of the seal 2, which is beneficial to improving the assembly and sealing effect between the first box body 1 and the second box body 6 and the seal 2 without adding other limiting members.
[0043] Specifically, the elastic structural member can be made of materials such as foam or rubber.
[0044] During the locking and sealing process, the annular protrusion 111 moves downward through the second mounting hole 21 of the seal 2 under the cooperation of the fastener 5, and the compression amount of the seal 2 is controlled based on the length of the annular protrusion 111 (the compression amount must be an allowable value for long-term reliable use of the seal, and at this time, the compression amount of the seal 2 is less than or equal to the initial thickness of the seal 2 minus the length of the annular protrusion 111).
[0045] It should be supplemented that the length of the annular protrusion in the thickness direction of the seal is greater than the initial thickness of the seal 2 minus the compression amount allowed for long-term reliable use of the seal 2. In addition, in actual production applications, the length of the annular protrusion 111 can be appropriately adjusted according to the compression amount of the seal 2 to achieve a better sealing effect.
[0046] In one embodiment, the annular protrusion 111 and the first mounting hole 11 are an integrally formed structural component.
[0047] Specifically, an integrally molded structural part can be formed by stamping, casting or injection molding, and the annular protrusion 111 and the first mounting hole 11 are integrally molded, which can not only reduce production costs, but also prevent the limiter from falling off during installation and disassembly, which is beneficial to improving the fastening and sealing effect and simplifying the installation process.
[0048] In one embodiment, the number of the first mounting holes 11 is multiple, and correspondingly, the number of the annular protrusions 111, the second mounting holes 21, the third mounting holes 61 and the fasteners 5 are also multiple, and the multiple first mounting holes 11, the multiple annular protrusions 111, the multiple second mounting holes 21, the multiple third mounting holes 61 and the multiple fasteners 5 are arranged in a one-to-one correspondence.
[0049] In the utility model, a plurality of first mounting holes 11, a plurality of annular protrusions 111, a plurality of second mounting holes 21, a plurality of third mounting holes 61 and a plurality of fasteners 5 are provided, and the positions of the plurality of structural members correspond one to one, which is conducive to solving the problems of falling off, misalignment and displacement of the additional limiting members during the fixing process.
[0050] Reference Figures 4-5 In one embodiment, the first box body 1 includes a first protrusion 3 and a first eaves 4 surrounding the outer periphery of the first protrusion 3, the first protrusion 3 protrudes in a direction away from the second box body 6, and a plurality of first mounting holes 11 are surrounded and spaced apart on the first eaves 4, the second box body 6 includes a second protrusion 7 and a second eaves 8 surrounding the outer periphery of the second protrusion 7, the second protrusion 7 protrudes in a direction away from the first box body 1, and a plurality of third mounting holes 61 are surrounded and spaced apart on the second eaves 8, and the sealing member 2 is an annular sheet, and the sealing member 2 is clamped between the first eaves 4 and the second eaves 8.
[0051] The first protrusion 3 and the second protrusion 7 serve as a storage area of the battery box to accommodate the battery. The multiple first mounting holes 11 arranged on the first eaves 4 surrounding the outer periphery of the first protrusion 3 and the multiple third mounting holes 61 arranged on the second eaves 8 surrounding the outer periphery of the second protrusion 7 are used for the through connection of the fastener 5.
[0052] In one embodiment, the fastener 5 is a fastening bolt.
[0053] Specifically, the seal 2 is placed between the first box body 1 and the second box body 6. During the specific operation of locking and sealing, the multiple annular protrusions 111 are squeezed and inserted into the multiple second mounting holes 21 on the seal 2, and move downward with the assistance of the fastening bolts until they contact the second box body 6, thereby completing the fastening and sealing of the first box body 1 and the second box body 6.
[0054] Reference Figures 6-7 In one embodiment, the fastening bolt includes a bolt body 51, a nut 52 and a gasket 53, the bolt body 51 passes through the gasket 53, the gasket 53 is located on the side of the first mounting hole 11 away from the sealing member 2, the bolt body 51 passes through the gasket 53, the first mounting hole 11, the annular protrusion 111 and the third mounting hole 61 in sequence and protrudes from the third mounting hole 61, and the nut 52 is sleeved on the portion of the bolt body 51 protruding from the third mounting hole 61.
[0055] Reference Figures 9 to 12 During the battery case assembly process described in the present application, after passing through the gasket 53, the bolt body 51 can also pass through the third mounting hole 61, the annular protrusion 111 and the first mounting hole 11 on the second case 6 in sequence to complete the sealing of the battery case, that is, the present application does not limit the installation direction of the fastener 5.
[0056] In the battery case of the utility model, when the fastening bolt is locking and sealing the first case 1 and the second case 6, it first squeezes the gasket 53 corresponding to the top of the first case 1, so that the first case 1 does not directly contact the bolt body 51, thereby avoiding the risk of damage to the first case 1 due to excessive local stress, which is beneficial to prolonging the life of the first case 1; at the same time, since the bolt body 51 passes through the first case 1 via the gasket 53, the first mounting hole 11 is also avoided from cracking during the locking and sealing process. In addition, since the annular protrusion 111 is in the second mounting hole 21 during the locking and sealing process, compared with the sealing limiter (such as a gasket) in the prior art, the limiter will not fall off during the installation and removal process. In addition, since the annular protrusion 111 is formed by folding the inner edge of the first mounting hole 11 toward the direction of the second case 6, the problem of relative movement of the first case 1 around the seal 2 is also avoided, which is beneficial to the assembly of the battery case, and the assembly process is reduced and the production efficiency is improved under the condition of meeting the tightening and sealing requirements.
[0057] In one embodiment, the inner diameters of the first mounting hole 11 , the second mounting hole 21 , and the third mounting hole 61 are all greater than or equal to the diameter of the bolt body 51 .
[0058] Specifically, since the bolt body 51 needs to pass through the first mounting hole 11, the annular protrusion 111 and the third mounting hole 61 in sequence during the installation process, the diameter of the bolt body 51 must be greater than or equal to the inner diameter of multiple first mounting holes 11, the second mounting hole 21 adapted to the annular protrusion 111, and the third mounting hole 61, so as to quickly penetrate and install.
[0059] In one embodiment, the first box body 1 and the second box body 6 are made of metal or non-metal material.
[0060] When the first box body 1 and the second box body 6 are made of non-metallic materials, they may specifically be composite materials or plastics.
[0061] Another embodiment of the present invention provides a battery pack, including a battery cell and the battery box, wherein at least one of the battery cells is placed in the battery box.
[0062] Specifically, in the battery case provided by the utility model, the inner edge of the first mounting hole 11 of the first case 1 is provided with an annular protrusion 111. During assembly of the battery case, the annular protrusion 111 passes through the second mounting hole 21 on the seal 2 and abuts against the second case 6. Without adding an additional seal limiting structure, the annular protrusion 111 can be used to achieve a tight and sealed connection between the first case 1 and the seal 2. Moreover, because the annular protrusion 111 and the first mounting hole 11 are an integrally formed structure, no additional limiting member is required to control the compression amount of the seal 2, which is beneficial to reducing production costs, improving the assembly efficiency of the battery case, and further improving the production efficiency of the battery pack. The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the utility model.
Claims
1. A battery box, characterized in that: The invention comprises a first box body, a second box body, a sealing member and a fastener, wherein the edges of the first box body and the second box body are joined to form a sealed cavity, the sealing member is located at the edge joining position of the first box body and the second box body, a first mounting hole is provided on the first box body, an inner edge of the first mounting hole is folded toward the direction of the second box body to form an annular protrusion, a second mounting hole is provided on the sealing member at a position corresponding to the first mounting hole, a third mounting hole is provided on the second box body at a position corresponding to the first mounting hole, the annular protrusion passes through the second mounting hole and abuts against the second box body, and the fastener passes through the first mounting hole, the annular protrusion and the third mounting hole in sequence to connect the first box body and the second box body.
2. A battery box according to claim 1, characterized in that: The shape of the annular protrusion is approximately cylindrical, and the outer diameter of the annular protrusion is less than or equal to the diameter of the second mounting hole.
3. A battery box according to claim 1, characterized in that: The inner diameter of the annular protrusion is greater than or equal to the diameter of the third mounting hole.
4. A battery box according to claim 1, characterized in that: The sealing member is an elastic structural member, and the length of the annular protrusion in the thickness direction of the sealing member is smaller than the initial thickness of the sealing member.
5. A battery box according to claim 1, characterized in that: The annular protrusion and the first box body are an integrally formed structural component.
6. A battery box according to claim 1, characterized in that: The number of the first mounting holes is multiple, and correspondingly, the number of the annular protrusions, the second mounting holes, the third mounting holes and the fasteners are also multiple, and the multiple first mounting holes, the multiple annular protrusions, the multiple second mounting holes, the multiple third mounting holes and the multiple fasteners are arranged in one-to-one correspondence.
7. A battery box according to claim 1, characterized in that: The first box body includes a first protrusion and a first eaves surrounding the outer periphery of the first protrusion, the first protrusion protrudes in a direction away from the second box body, and a plurality of first mounting holes are surrounded and spaced apart on the first eaves, the second box body includes a second protrusion and a second eaves surrounding the outer periphery of the second protrusion, the second protrusion protrudes in a direction away from the first box body, and a plurality of third mounting holes are surrounded and spaced apart on the second eaves, and the sealing member is an annular sheet, and the sealing member is clamped between the first eaves and the second eaves.
8. A battery box according to claim 1, characterized in that: The fastener is a fastening bolt, which includes a bolt body, a nut and a gasket. The gasket is located on the side of the first mounting hole away from the sealing member. The bolt body passes through the gasket, the first mounting hole, the annular protrusion and the third mounting hole in sequence and protrudes from the third mounting hole. The nut is sleeved on the portion of the bolt body protruding from the third mounting hole.
9. A battery box according to claim 8, characterized in that: The inner diameter of the first mounting hole, the inner diameter of the second mounting hole, and the inner diameter of the third mounting hole are all greater than or equal to the diameter of the bolt body.
10. A battery pack, characterized in that: It comprises a battery cell and a battery case as claimed in any one of claims 1 to 9, wherein at least one of the battery cells is placed in the battery case.