Battery pack mounting structure

Abstract

The utility model relates to a battery pack mounting structure which comprises a battery pack module and a box body, a battery pack, a circuit board, a battery pack contact piece and the like are integrated in a battery pack shell to form an independent battery pack module, and the battery pack module is detachably mounted in the box body, so that the requirements of the battery pack on detachability and easiness in replacement can be met; meanwhile, a sealing structure is designed between the battery pack module and the bottom of the box body, and a stop structure is matched with a sealing ring, so that the waterproof sealing requirement of a use environment is met.

Description

Technical Field

[0001] This utility model relates to the field of batteries, specifically to a battery pack mounting structure. Background Technology

[0002] In the mining industry, battery packs are widely used in various mining equipment due to their portability. The harsh working environment in mines necessitates that battery packs not only meet installation requirements but also waterproofing and sealing requirements, depending on the environment's demands. Currently, the common method for installing battery packs in mining is to place the battery pack inside a housing and then use adhesive to create an integrated structure. While this method can meet waterproofing and sealing requirements to some extent, the integrated structure after adhesive application is not removable or replaceable, resulting in high maintenance costs.

[0003] In existing technologies, there are solutions in other fields that allow battery packs to be detachably installed inside the enclosure. However, these solutions are mostly used in indoor or ordinary environments, with little or no requirement for waterproof sealing performance. Their installation structures cannot meet the needs of use in harsh environments such as mining equipment. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a battery pack installation structure in which the battery pack is detachably connected to the housing and meets the requirements for waterproof sealing of the battery pack.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A battery pack mounting structure includes a housing and a battery pack module. The battery pack module includes a battery pack shell, a battery pack, a circuit board, and battery pack contacts. The battery pack and the circuit board are installed inside the battery pack shell. The battery pack contacts are installed on the bottom surface of the battery pack shell. The top surface of the housing is open. A contact module corresponding to the battery pack contacts is installed at the bottom of the housing. The battery pack module is detachably installed inside the housing and sealed by a sealing structure.

[0007] Furthermore, after the battery pack, circuit board, and battery pack contacts are installed in place within the battery pack housing, glue is injected into the battery pack housing to fix and seal the components, thereby forming the battery pack module.

[0008] Furthermore, on the bottom outer surface of the battery pack housing, a flange protruding from the bottom outer surface is provided around the area where the battery pack contact is located. A groove adapted to the flange is provided on the bottom surface of the housing. The contact module at the bottom of the housing is installed in the area enclosed by the groove. The flange and the groove form a stop structure on the outer periphery of the contact mating area, which serves to block water.

[0009] Furthermore, a radial sealing ring is provided on the stop structure.

[0010] Furthermore, the radial sealing ring is installed on the outer peripheral surface of the flange, which can achieve radial sealing between the flange and the groove.

[0011] Furthermore, an axial sealing ring is provided inside the stop structure.

[0012] Furthermore, the axial sealing ring is disposed on the bottom outer surface of the battery pack housing located between the inner side of the flange and the outer periphery of the battery pack contact, which can achieve axial sealing of the contact mating area.

[0013] Furthermore, the cross-section of the axial sealing ring is "H" shaped.

[0014] Furthermore, one end of the battery pack contact is located inside the battery pack housing and connected to the circuit board, while the other end of the battery pack contact is located on the outer side of the bottom of the battery pack housing.

[0015] Furthermore, the area on the bottom surface of the battery pack housing where the battery pack contact is mounted protrudes outward to create space that avoids the battery pack contact.

[0016] Furthermore, the battery pack contact is a pin, and the bottom surface of the pin is a plane.

[0017] Furthermore, the contacts on the contact module are spring pins or spring sheets. After the battery pack module is installed in the housing, the battery pack contacts engage with the spring pins or spring sheets on the housing.

[0018] Furthermore, the spring is a double-layered spring, with the outer and inner layers made of different materials.

[0019] Furthermore, a mounting groove is formed by recessing the lower side of the bottom surface of the enclosure corresponding to the position of the contact module, which is used to accommodate and install the enclosure circuit board, and the contact module is connected to the enclosure circuit board.

[0020] Furthermore, the battery pack module is fixed to the housing from the bottom or top surface, and the fixing methods include, but are not limited to, bolts, nuts, clips, and self-tapping screws.

[0021] Furthermore, the battery pack housing has downwardly extending fixing posts on both sides of its bottom. The bottom surface of the housing has mounting holes corresponding to the fixing posts. Bolts pass through the mounting holes and engage with the fixing posts to fix the battery pack housing to the housing.

[0022] Furthermore, the fixing column is provided with a threaded hole, which is used to engage with the bolt. The bolt hole is not connected to the inside of the battery pack housing.

[0023] Furthermore, a nut is provided inside the fixing column, and the bolt passes through the mounting hole and engages with the nut inside the fixing column.

[0024] Furthermore, the top surface of the battery pack housing extends outwards to form a raised edge, which is used to limit the installation direction of the battery pack module. When the lower surface of the raised edge is in contact with the top surface of the housing, the battery pack module is installed in place inside the housing.

[0025] Furthermore, screws are installed on the raised edge to connect with the top surface of the housing, thereby fixing the battery pack module to the housing.

[0026] Furthermore, an anti-misassembly structure is provided between the battery pack housing and the box body. The anti-misassembly structure is achieved through an asymmetrical structure provided on the battery pack housing and the box body.

[0027] Furthermore, the asymmetric structure includes: a protrusion extending along the installation direction on one side of the battery pack housing, and a guide groove corresponding to the protrusion on the housing.

[0028] Furthermore, raised ribs are provided on the inner wall of the housing along the battery pack module mounting direction.

[0029] Furthermore, the side walls of the enclosure are fully or partially covered with the battery pack module.

[0030] Beneficial effects:

[0031] 1. This utility model improves the structure by designing a battery pack shell on the outside of the battery pack, integrating the battery pack, circuit board, etc. into the battery pack shell to form an independent module. The modular design of the battery pack and its detachable installation in the external box can meet the needs of installation and detachable replacement. At the same time, a sealing structure is designed to meet the waterproof sealing requirements of the battery pack module.

[0032] 2. This utility model effectively seals the battery pack and circuit board inside the battery pack housing through potting treatment. A special stop structure design is adopted between the battery pack module and the housing, using the cooperation of flanges and grooves to effectively stop the contact mating area. Combined with radial sealing structure or axial sealing structure, it ensures a reliable sealing effect and can meet the waterproof sealing requirements in harsh environments.

[0033] 3. This utility model features a raised edge on the top of the battery pack housing, a fixing structure at the bottom or top, an anti-misassembly design between the housing and the battery pack module, and a series of structural improvements such as raised ribs inside the housing. These improvements make the battery pack installation structure simple, compact, easy to install, stable, and reliable. It enables modular assembly of the battery pack and features detachability, easy replacement, and low maintenance costs. Attached Figure Description

[0034] Figure 1 A schematic diagram of the battery pack mounting structure of this utility model embodiment (separated state);

[0035] Figure 2(a) and Figure 2(b) are schematic diagrams of the battery pack installation structure (assembled state) according to an embodiment of the present invention.

[0036] Figure 3 A schematic diagram of the battery pack module of this utility model embodiment;

[0037] Figure 4 A schematic diagram of the structure of the battery pack housing according to an embodiment of this utility model;

[0038] Figure 5 A cross-sectional view of the battery pack module according to an embodiment of this utility model;

[0039] Figure 6 A structural schematic diagram of the battery pack module from the bottom view of this utility model embodiment;

[0040] Figure 7 A schematic diagram of the structure of the box body according to an embodiment of this utility model;

[0041] Figure 8 A cross-sectional structural diagram of the box body according to an embodiment of this utility model;

[0042] Figure 9 A cross-sectional view of the battery pack mounting structure according to an embodiment of this utility model;

[0043] Figure 10 A schematic diagram of the structure of the housing contact module of this utility model embodiment 1;

[0044] Figure 11 A schematic diagram of the second embodiment of the housing contact module of this utility model;

[0045] Figure 12 A schematic diagram of the anti-misinstallation structure of the battery pack mounting structure according to an embodiment of this utility model;

[0046] Figure 13 A cross-sectional schematic diagram of the battery pack mounting structure according to an embodiment of this utility model;

[0047] Figure 14 A schematic diagram of the semi-enclosed box method of this utility model embodiment.

[0048] Figure label:

[0049] 100 Battery pack module, 101 Battery pack housing, 102 Battery pack, 103 Circuit board, 104 Battery pack contact, 105 Flange, 106 Radial seal, 107 Axial seal, 108 Protruding edge, 109 Fixing post, 110 Nut, 111 Protruding strip;

[0050] 200 Housing, 201 Contact module, 202 Spring pin, 203 Spring piece, 204 Groove, 205 Boss, 206 Mounting hole, 207 Mounting slot, 208 Rib, 209 Guide groove, 210 Notch, 211 Protrusion, 212 Bolt. Detailed Implementation

[0051] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0052] The structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0053] The orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "middle," "longitudinal," "transverse," "horizontal," "inner," "outer," "radial," "circumferential," "top," and "bottom" in this specification are based on the orientations or positional relationships shown in the accompanying drawings and are only for the purpose of simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as an absolute limitation of this utility model.

[0054] like Figure 1 As shown in Figure 2, the battery pack installation structure in this embodiment includes a battery pack module 100 and a housing 200. The housing 200 has an opening at the top. The battery pack module 100, as an independent module, is detachably installed into the housing 200 through the opening at the top of the housing 200 and is fixed by a fixing structure. The state of the battery pack module 100 after being installed into the housing 200 is shown in Figure 2. Figures 2(a) and 2(b) are schematic diagrams of the structure shown from different angles.

[0055] like Figure 3-6 As shown, the battery pack module 100 includes a battery pack housing 101, a battery pack 102, a circuit board 103, and a battery pack contact 104. The battery pack housing 101 is a housing structure that matches the shape of the box 200. The side of the housing is open, and the internal space is used to place the battery pack 102 and the circuit board 103. The internal space of the battery pack housing 101 is usually adapted to the size of the battery pack 102 to be placed, so as to make the structure compact and reasonable. The battery pack contact 104 is installed on the bottom surface of the battery pack housing 101. In order to prevent the battery pack contact 104 from interfering with the battery pack 102 inside the housing after installation, the part of the battery pack contact 104 installed on the bottom surface of the battery pack housing 101 protrudes downward as a whole, so as to form a space between the battery pack 102 and the bottom surface of the battery pack housing 101 to avoid the battery pack contact 104.

[0056] The battery pack 102 and circuit board 103 are respectively inserted into the battery pack housing 101 through the side opening. The circuit board 103 is placed on the side of the battery pack 102 and connected to the battery pack 102. The battery pack contact 104 is installed on the bottom surface of the battery pack housing 101. The upper end of the battery pack contact 104 extends into the battery pack housing 101 and is connected to the circuit board 103 through a circuit. The lower end of the battery pack contact 104 is located on the outer side of the bottom surface of the battery pack housing 101. After the battery pack 102, circuit board 103 and battery pack contact 104 and other components are installed in place on the battery pack housing 101, glue is injected into the battery pack housing 101 through the side opening, and a flat glue injection surface is formed at the side opening to fix and seal the components, forming the battery pack module 100.

[0057] Corresponding to the battery pack contact 104 at the bottom of the battery pack module 100, such as Figure 7-8 As shown, a contact module 201 is installed on the bottom surface of the housing 200 for engaging with the contact at the bottom of the battery pack module 100 to conduct electricity. Since the battery pack contact 104 of the battery pack module 100 engages with the contact module 201 of the housing 200 externally, a sealing structure is designed between the battery pack module 100 and the bottom of the housing 200 to meet the waterproof sealing requirements of the battery pack module 100 during use, thereby achieving waterproof sealing of the contact mating area.

[0058] like Figure 3-9As shown, on the bottom outer surface of the battery pack housing 101, a flange 105 protruding from the bottom outer surface is provided around the area where the battery pack contact 104 is located; correspondingly, a groove 204 adapted to the flange 105 is provided on the bottom surface of the housing 200. The groove 204 is provided such that the bottom of the housing 200 located inside the groove 204 forms a boss 205. The contact module 201 is installed on the boss 205. When the battery pack module 100 is installed inside the housing 200, the flange 105 and the groove 204 form a stop structure on the outer periphery of the contact mating area, which plays a role in blocking water.

[0059] To improve sealing performance, a radial sealing ring 106 is provided on the stop structure; specifically, the radial sealing ring 106 is installed on the outer peripheral surface of the flange 105, which can realize the sealing fit between the outer peripheral surface of the flange 105 and the side wall of the groove 204, thereby ensuring the radial sealing of the contact mating area.

[0060] Alternatively, an axial sealing ring 107 may be provided inside the stop structure. The axial sealing ring 107 is disposed on the outer bottom surface of the battery pack housing 101 between the outer periphery of the battery pack contact 104 and the inner side of the flange 105. When the battery pack module 100 is installed into the housing 200, the inner bottom surface of the housing 200 presses the axial sealing ring 107, thereby achieving a seal between the contact surface between the bottom of the battery pack housing 101 and the bottom of the housing 200, thus ensuring the axial seal of the contact mating area.

[0061] Axial sealing generates a force opposite to the installation direction of battery pack module 100, which increases the insertion force when installing battery pack module 102. Therefore, the cross-section of the axial sealing ring 107 is "H" shaped. This cross-sectional shape of the sealing ring can reduce the resistance when installing battery pack module 100 to a certain extent without affecting the sealing effect.

[0062] The axial seal is located in the installation direction of the battery pack module 100. Therefore, the axial seal has high requirements for the installation fit between the battery pack module 100 and the housing 200. When the battery pack module 100 is not installed properly, the axial seal is prone to failure. In actual use, technicians can use axial seal, radial seal or a combination of axial and radial seal between the battery pack module 100 and the housing 200 according to actual needs to meet the waterproof sealing of the contact mating area.

[0063] Therefore, after the battery pack module 100 is installed into the housing 200, the battery pack module 100 itself has been potted to ensure the sealing performance of the battery pack housing 101 and its internal components. The contact mating area at the bottom is sealed by the stop structure and the sealing ring, thereby fully ensuring the waterproof sealing performance of the battery pack installation structure and enabling it to meet the waterproof sealing performance requirements in harsh environments.

[0064] After the battery pack module 100 is installed in the housing 200, the battery pack contact 104 and the contact module 201 on the bottom surface of the housing 200 cooperate to achieve electrical connection. In this embodiment, the battery pack contact 104 is a pin, and multiple pins are installed on the bottom surface of the battery pack housing 101. The bottom surface of the pin is flat to facilitate cooperation with the contact module 201 on the housing 200. The contacts installed on the contact module 201 of the housing 200 are spring pins 202 or spring sheets 203. The spring pins 202 or spring sheets 203 correspond one-to-one with the pins. When the battery pack module 100 is installed, the bottom surface of the pin presses down on the spring pin 202 or spring sheet 203 structure to achieve connection.

[0065] A mounting port for the contact module 201 is provided on the boss 205 within the groove 204 at the bottom of the housing 200. The mounting port matches the shape of the contact module 201, enabling the installation and positioning of the contact module 201. Figure 7 - 11 illustrates the structure of the contact module 201 using a spring pin 202 or a spring sheet 203 as the contact. It should be noted that the illustrated structure is only an example. In actual applications, the contact module 201 can be installed in the mounting port according to the illustrated structure or other suitable shapes and positioning methods as needed.

[0066] The contact module 201 uses the structure of the spring pin 202 as follows: Figure 7-10 As shown, in Figure 7-10 In the embodiment shown, the contact module 201 has a stepped structure that is larger at the bottom and smaller at the top. Multiple protrusions 211 are provided on the side wall of the contact module 201. The mounting port of the contact module 201 is provided on the boss 205 in the groove 204 at the bottom of the housing 200. The mounting port matches the shape of the contact module 201. The contact module 201 is installed from bottom to top to the bottom of the housing 200, positioned by the steps, and fixed in the mounting port on the boss 205 by the interference fit formed by the protrusions 211.

[0067] In another embodiment of the contact module 201, the contacts of the contact module 201 use spring sheets 203, such as... Figure 11 The diagram shows the structure of the contact module 201 using the spring 203. Figure 11In the embodiment shown, the contact module 201 has a stepped structure that is larger at the top and smaller at the bottom. The mounting port on the bottom boss 205 of the housing 200 matches the shape of the contact module 201. The contact module 201 is installed from top to bottom to the bottom of the housing 200 and is fixed to the bottom of the housing 200 by the clamping force after the battery pack module 100 is installed.

[0068] Because the spring 203 is prone to fatigue when used in a vibrating environment, which reduces its elasticity, the spring 203 is designed as a double-layer spring 203 with inner and outer layers to ensure its elasticity. The outer spring 203 is in direct contact with the pin and requires good conductivity. It is generally made of copper alloy. The inner spring 203 requires good elasticity and is generally made of stainless steel. The combination of the inner and outer double-layer spring 203 can ensure both elasticity and effective conductivity.

[0069] Furthermore, such as Figure 7 As shown, the bottom surface of the housing 200 is recessed to form a mounting groove 207 corresponding to the position of the contact module 201, which is used to accommodate and install the housing circuit board (not shown in the figure). The bottom end of the contact on the contact module 201 is connected to the housing circuit board.

[0070] After the battery pack module 100 is installed into the housing 200, it needs to be secured by a fixing structure to ensure stability during use. During the installation of the battery pack module 100 into the housing 200 from top to bottom, it will press down on the contacts and sealing structure of the housing 200, generating an upward rebound force. Therefore, a downward constraint force is needed to secure the battery pack module 100. The battery pack module 100 can be fixed to the housing 200 from the bottom or top surface, and the fixing methods include, but are not limited to, bolts, nuts, clips, and self-tapping screws.

[0071] To facilitate identification and determination of whether the battery pack module 100 is installed in place, the top surface of the battery pack housing 101 extends outward to form a raised edge 108. The raised edge 108 is used to axially limit the battery pack module 100. When the lower surface of the raised edge 108 is in contact with the top surface of the housing 200, the battery pack module 100 is installed in place within the housing 200 and can be fixed by a fixing structure. The presence of the raised edge 108 also facilitates the removal of the battery pack module 100 from the housing 200. In addition, the raised edge 108 also plays a certain role in preventing debris from entering.

[0072] When the battery pack module 100 is fixed to the housing 200 from the bottom, such as Figure 3-9As shown, downwardly extending fixing posts 109 are respectively provided on both sides of the bottom of the battery pack housing 101. The fixing posts 109 are provided with nuts 110 or threaded holes. The bottom surface of the box 200 is provided with mounting holes 206 at positions corresponding to the fixing posts 109. Bolts 212 pass through the mounting holes 206 and are tightened with the threaded holes or nuts 110 in the fixing posts 109 to fix the battery pack housing 101 to the box 200.

[0073] When the fixing post 109 has a threaded hole, the threaded hole is not connected to the inside of the battery pack housing 101 to prevent affecting the waterproof sealing effect; when the fixing post 109 has a nut 110, the nut 110 is installed into the fixing post 109 by heat fusion or insert structure.

[0074] When the battery pack module 100 is fixed to the housing 200 from the top (not shown in the figure), screws are provided on the protruding edge 108 to connect with the top surface of the housing 200, thereby fixing the battery pack module 100 to the housing 200.

[0075] Typically, both the housing 200 and the battery pack casing 101 are axisymmetric structures, with their axes parallel to the installation direction. When the positive and negative terminals of the battery are defined during use, a reverse-installation prevention structure is required to prevent the battery pack module 100 from being installed incorrectly. In this embodiment, the reverse-installation prevention structure is implemented by setting the battery pack casing 101 and the housing 200 as non-axisymmetric structures, such as... Figure 12-13 As shown, a protrusion 111 extending along the installation direction is provided on one side of the battery pack housing 101 in the circumferential direction, and a corresponding guide groove 209 is provided on the housing 200. Installation can only be carried out when the protrusion 111 on the battery pack housing 101 corresponds to the guide groove 209 on the housing 200, thereby achieving error prevention during installation. When the positive and negative terminals of the battery are undefined, there is no need to design an error prevention structure.

[0076] Furthermore, such as Figure 12-13 As shown, multiple ribs 208 extending along the installation direction of the battery pack module 100 are provided on the inner wall of the housing 200. When the battery pack module 100 is installed, the ribs 208 and the surface of the battery pack housing 101 are fitted with a clearance fit. The line-plane fit is used instead of the plane-plane fit, which reduces the contact area between the battery pack housing 101 and the housing 200. This avoids the battery pack module 100 from being hindered by plane deformation or high plane roughness, thereby reducing the tolerance requirements for the flatness and roughness of the battery pack housing 101.

[0077] In applications with stringent environmental requirements, it is essential to prevent foreign objects from entering the housing 200 during use. Therefore, the side walls of the housing 200 completely enclose the battery pack 102 module 100. Additionally, the raised edge 108 on the top surface of the battery pack module 100 also serves to prevent foreign objects from entering. Of course, in applications with less stringent environmental requirements, the side walls of the housing 200 can partially enclose the battery pack 102 module 100, such as... Figure 14 As shown, the upper side wall of the housing 200 has a notch 210, which is not closed and partially wraps the battery pack module 100. At the same time, the upper part of the battery pack module 100 has been potted and the bottom has a sealed structure. Therefore, the partial wrapping method will not affect the waterproof sealing performance and can also make it easier to disassemble the battery pack module 100.

[0078] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A battery pack mounting structure comprising a case (200) and a battery pack module (100), characterized by, The battery pack module (100) comprises a battery pack shell (101), a battery pack (102), a circuit board (103) and a battery pack contact (104), the battery pack (102) and the circuit board (103) are installed in the battery pack shell (101), the battery pack contact (104) is installed on the bottom surface of the battery pack shell (101), the top surface of the box (200) is open, the bottom of the box (200) is provided with a contact module (201) corresponding to the battery pack contact (104), and the battery pack module (100) is detachably installed in the box (200) and sealed through a sealing structure.

2. The battery pack mounting structure according to claim 1, characterized by After the battery pack (102), the circuit board (103) and the battery pack contact (104) are installed in the battery pack shell (101), the battery pack shell (101) is filled with glue to fix and seal the components to form the battery pack module (100).

3. The battery pack mounting structure according to claim 1, characterized by A flange (105) protruding from the bottom outer surface is arranged around the area where the battery pack contact (104) is located on the bottom outer surface of the battery pack shell (101), and a groove (204) matched with the flange (105) is arranged on the bottom surface of the box (200), the contact module (201) at the bottom of the box (200) is installed in the area surrounded by the groove (204), and the flange (105) and the groove (204) form a stop structure on the outer periphery of the contact matching area, thereby playing a water blocking role.

4. The battery pack mounting structure according to claim 3, characterized by A radial sealing ring (106) is arranged on the stop structure.

5. The battery pack mounting structure according to claim 4, characterized by The radial sealing ring (106) is installed on the outer periphery of the flange (105), and can realize radial sealing between the flange (105) and the groove (204).

6. The battery pack mounting structure according to claim 3, characterized by An axial sealing ring (107) is arranged inside the stop structure.

7. The battery pack mounting structure according to claim 6, characterized by The axial sealing ring (107) is arranged on the bottom outer surface of the battery pack shell (101) between the inner side of the flange (105) and the outer periphery of the battery pack contact (104), and can realize axial sealing of the contact matching area.

8. The battery pack mounting structure according to claim 7, characterized by The axial sealing ring (107) has a "H" shape in cross section.

9. The battery pack mounting structure according to claim 3, characterized by One end of the battery pack contact (104) is located in the battery pack shell (101) and connected with the circuit board (103), and the other end of the battery pack contact (104) is located outside the bottom of the battery pack shell (101).

10. The battery pack mounting structure according to claim 9, characterized by The area where the battery pack contact (104) is installed on the bottom surface of the battery pack shell (101) is protruded outward as a whole to form a space for avoiding the battery pack contact (104).

11. The battery pack mounting structure according to claim 9, characterized by The battery pack contact (104) is a pin, and the bottom surface of the pin is a plane.

12. The battery pack mounting structure according to claim 9, characterized by The contact on the contact module (201) is a spring pin (202) or a spring sheet (203), and the battery pack contact (104) is in contact with the spring pin (202) or the spring sheet (203) on the box (200) after the battery pack module (100) is installed in the box (200).

13. The battery pack mounting structure according to claim 12, characterized by The spring sheet (203) is a double-layer spring sheet (203), and the outer spring sheet (203) and the inner spring sheet (203) are made of different materials.

14. The battery pack mounting structure according to claim 12, characterized by The bottom surface of the box (200) is recessed to form a mounting groove (207) corresponding to the position of the contact module (201), which is used to accommodate and mount the box circuit board.

15. The battery pack mounting structure according to any one of claims 1 to 14, characterized by The bottom of the battery pack shell (101) is provided with a fixed column (109) extending downward on both sides, and the bottom surface of the box (200) is provided with a mounting hole (206) corresponding to the fixed column (109), and the bolt (212) passes through the mounting hole (206) and cooperates with the fixed column (109) to realize the fixation of the battery pack shell (101) and the box (200).

16. The battery pack mounting structure according to claim 15, characterized by The fixed column (109) is provided with a threaded hole, and the bolt (212) cooperates with the threaded hole.

17. The battery pack mounting structure according to claim 15, characterized by The fixed column (109) is provided with a threaded hole, and the bolt (212) cooperates with the threaded hole.

18. The battery pack mounting structure according to any one of claims 1 to 14, characterized by The top surface of the battery pack shell (101) extends to form a convex edge (108), which is used to limit the installation direction of the battery pack module (100), and when the lower surface of the convex edge (108) is attached to the top surface of the box (200), the battery pack module (100) is installed in place in the box (200).

19. The battery pack mounting structure according to claim 18, characterized by The screw is arranged on the convex edge (108) and connected with the top surface of the box (200), so as to realize the fixation between the battery pack module (100) and the box (200).

20. The battery pack mounting structure according to any one of claims 1 to 14, characterized by An error prevention structure is arranged between the battery pack shell (101) and the box (200), and the error prevention structure is realized by the asymmetric structure arranged on the battery pack shell (101) and the box (200).

21. The battery pack mounting structure according to claim 20, wherein The asymmetric structure includes a convex strip (111) arranged on one side of the battery pack shell (101) and extending along the installation direction, and a guide groove (209) arranged on the box (200) and corresponding to the convex strip (111).

22. The battery pack mounting structure according to any one of claims 1 to 14, characterized by The convex rib (208) is arranged on the inner wall of the box (200) along the installation direction of the battery pack module (100).

23. The battery pack mounting structure according to any one of claims 1 to 14, characterized by The side wall of the box (200) completely or partially wraps the battery pack module (100).

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