Expansion beam structure, battery case, and battery pack

Abstract

The utility model provides a kind of expansion beam structure, battery box and battery pack, comprising: multiple expansion beams, at least including split setting first expansion beam and second expansion beam, first expansion beam and second expansion beam are along first direction extension setting, first expansion beam is stacked with second expansion beam in second direction, second direction is set with first direction angle;Connecting piece is connected with first expansion beam and second expansion beam.Through multiple expansion beams using split setting first expansion beam and second expansion beam, and along first direction extension setting, this design makes that expansion beam can be flexibly adjusted length in first direction according to actual needs, to adapt to different use scenarios and installation requirement, greatly improve the versatility and applicability of expansion beam structure.

Description

Technical Field

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

[0002] In related technologies, the expansion beams of existing technologies are integrated without a separate structure. When dealing with different battery models, different housing models need to be developed for adaptation, which increases R&D costs and production cycles, and reduces the product's versatility and scalability. Utility Model Content

[0003] This utility model provides an expansion beam structure, a battery housing, and a battery pack. It addresses the technical problem of needing to develop different housing models to adapt to different battery types, thereby increasing R&D costs and production cycles, and reducing product versatility and scalability.

[0004] In a first aspect, an embodiment of the present invention provides an expansion beam structure, comprising:

[0005] A plurality of expansion beams, including at least a separately arranged first expansion beam and a second expansion beam, the first and second expansion beams extending along a first direction, the first expansion beam overlapping the second expansion beam in a second direction, the second direction forming an angle with the first direction; and

[0006] The connector is used to connect the first expansion beam and the second expansion beam.

[0007] In this embodiment of the invention, multiple expansion beams are constructed using a separate first expansion beam and a second expansion beam, extending along a first direction. This design allows the length of the expansion beams in the first direction to be flexibly adjusted according to actual needs, adapting to different usage scenarios and installation requirements, thus greatly improving the versatility and applicability of the expansion beam structure. In related technologies, traditional expansion beam structures are often integral with a fixed length, making it difficult to meet diverse usage needs. The separate, extended design of this invention effectively solves this problem.

[0008] In some embodiments, a first mounting position is provided on the side of the first expansion beam facing the second expansion beam, and a second mounting position is provided on the side of the second expansion beam corresponding to the first expansion beam.

[0009] The connector is disposed at the overlap of the first expansion beam and the second expansion beam, and connects the first mounting position and the second mounting position to fix them together.

[0010] This design, with first and second mounting positions respectively on the first and second expansion beams and connected and fixed using connectors, enhances the stability and reliability of the connection between the two expansion beams. In practical applications, expansion beams may be subjected to various external forces, such as vibration, tension, and compression. Traditional connection methods may not guarantee the stability of the connection. However, the specific mounting positions and connectors in this technical solution effectively resist these external forces, reduce relative displacement and loosening between the expansion beams, thereby improving the safety and service life of the entire structure.

[0011] In some embodiments, the first mounting position includes a first mounting hole, which is disposed on the side of the first expansion beam facing the second expansion beam;

[0012] The second mounting position includes a second mounting hole, which is located on the side of the second expansion beam facing the first expansion beam. The connector passes through the first mounting hole and the second mounting hole.

[0013] This configuration, with first and second mounting holes respectively provided on opposite sides of the first and second expansion beams, allows for the effective connection of the first and second expansion beams. This connection method improves structural stability and reduces the likelihood of component loosening or separation due to vibration, external impact, etc., thus lowering the risk of equipment failure and extending equipment lifespan. Furthermore, this mounting hole configuration facilitates assembly and disassembly. During manufacturing, workers can easily insert the connector into the first and second mounting holes, improving production efficiency and reducing costs. During equipment maintenance or repair, the connector can be quickly disassembled for inspection and replacement of the expansion beams, reducing downtime and improving equipment utilization.

[0014] In some embodiments, a first adhesive groove is recessed on the side of the first expansion beam facing the second expansion beam, and a third direction is arranged at an angle to the first and second directions; and / or,

[0015] The second expansion beam has a recessed groove on the side facing the first expansion beam, and the third direction is set at an angle to the first and second directions.

[0016] This design, with the presence of the glue groove, allows for a more even distribution of adhesive between the expansion beams. Compared to the absence of a glue groove, the adhesive can better fill the gaps between the expansion beams, enhancing the connection strength between the first and second expansion beams. This is particularly important for devices subjected to significant external forces or vibrations, ensuring that the connection between the expansion beams will not easily loosen or separate in complex working environments, thus guaranteeing the normal operation of the device. When the first and second expansion beams are installed together, the adhesive in the glue groove can form a tighter seal at the joint. This seal effectively prevents external dust, moisture, and other impurities from entering the components, thereby improving the reliability and stability of the entire device, reducing the probability of malfunctions caused by impurities, and extending the device's service life.

[0017] In some embodiments, the first adhesive groove extends along a first direction; and / or,

[0018] The second adhesive groove extends along the first direction.

[0019] This configuration, extending the first and / or second glue trays along the first direction, effectively improves the uniformity of glue application. Because the glue trays extend in the same direction, the glue experiences more consistent resistance and guidance during flow, reducing uneven glue distribution caused by irregular shapes or inconsistent orientations of the trays, thus improving the glue application quality and stability of the product. Furthermore, the glue trays extending along the first direction facilitate continuous glue application. Since the direction of the glue trays is clear and consistent, the supply and flow of glue are smoother, reducing downtime and adjustment time during the application process, thereby improving overall production efficiency.

[0020] In some embodiments, the expansion beam structure further includes a first limiting groove, which is disposed on one side of the first expansion beam along a third direction, the third direction being set at an angle to the first and second directions, and the first limiting groove is used for insertion of a limiting portion on the end plate; and / or,

[0021] The expansion beam structure also includes a second limiting groove, which is located on one side of the second expansion beam along a third direction. The third direction is set at an angle to the first and second directions. The second limiting groove is used for the insertion of the limiting part on the end plate.

[0022] This design, through the first and second limiting slots, precisely limits the relative position of the end plate and the expansion beam. When the limiting part on the end plate is inserted into the corresponding limiting slot, it effectively prevents unnecessary displacement and shaking of the end plate during use, greatly improving the stability and reliability of the entire structure. This precise limiting function is particularly important for applications with high requirements for structural stability, such as in vibration environments or under large external forces, ensuring that the end plate and the expansion beam maintain a tight and accurate connection, reducing the probability of failure and extending the service life of the equipment. During assembly, the limiting slots provide clear positioning guidance for the installation of the end plate, allowing operators to quickly and accurately install the end plate onto the expansion beam, reducing assembly difficulty and time costs.

[0023] Secondly, embodiments of this utility model provide a battery housing, including an expansion beam structure employing all the above embodiments.

[0024] In some embodiments, the battery housing includes a housing with an expansion beam structure disposed inside the housing to divide the internal cavity of the housing into a cell compartment and an electrical compartment.

[0025] This design divides the internal cavity of the battery box into a cell compartment and an electrical compartment via an expansion beam structure, achieving physical isolation between the cells and electrical components. This technical feature effectively reduces the adverse effects of heat and gases generated by the cells on the electrical components during battery use. For example, it prevents electrical components from being damaged by overheating, reduces the probability of short circuits and other faults, and improves the safety and stability of the battery system.

[0026] Thirdly, embodiments of the present invention provide a battery pack, including a battery housing employing all the above embodiments.

[0027] In some embodiments, the battery pack further includes a battery module disposed in the cell compartment. The battery module includes a battery pack and an end plate disposed on the periphery of the battery pack. The end plate and the battery pack form an integral structure, and a limiting part is provided on the side of the end plate facing away from the battery pack. The limiting part is engaged with at least one of a first limiting groove and a second limiting groove.

[0028] This design integrates the battery pack and end plate into a single structure, enhancing the structural strength and stability of the battery module. The integrated structure reduces gaps between components, lowering the risk of electrical faults caused by loosening or poor connections. A limiting part on the end plate facing away from the battery pack can engage with at least one of the first and second limiting slots. This limiting design accurately positions the battery module within the cell compartment, preventing displacement or shaking during use. Precise positioning helps ensure stable electrical connections between battery modules, reducing issues like loose connections and short circuits caused by displacement, further improving the safety and reliability of the battery pack.

[0029] Furthermore, it is worth noting that when the battery pack is installed into the battery box, it needs to be glued to bond the battery module to the battery box. Therefore, a pressure holding operation is required during this process to ensure that the two are firmly attached together. However, in this embodiment, when the limiting part provided on the side of the end plate facing away from the battery pack can be engaged with at least one of the first limiting groove and the second limiting groove, it can achieve the same pressure holding effect, thereby reducing the need for additional pressure holding operations.

[0030] The beneficial effects of the embodiments of this utility model are as follows:

[0031] In this embodiment of the invention, multiple expansion beams are constructed using a separate first expansion beam and a second expansion beam, extending along a first direction. This design allows the length of the expansion beams in the first direction to be flexibly adjusted according to actual needs, adapting to different usage scenarios and installation requirements, thus greatly improving the versatility and applicability of the expansion beam structure. In related technologies, traditional expansion beam structures are often integral with a fixed length, making it difficult to meet diverse usage needs. The separate, extended design of this invention effectively solves this problem. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is an exploded structural diagram of the expansion beam structure provided in an embodiment of this utility model;

[0034] Figure 2 yes Figure 1 Enlarged view of the structure at point A in the middle;

[0035] Figure 3This is an exploded structural diagram of the battery pack provided in an embodiment of the present invention;

[0036] Figure 4 yes Figure 3 Enlarged view of the structure at point B in the middle;

[0037] Figure 5 yes Figure 3 A schematic diagram of the middle plate.

[0038] Explanation of reference numerals in the attached figures:

[0039] 100. Expansion beam structure; 200. Battery housing; 300. Battery pack;

[0040] 1. Multiple expansion beams; 11. First expansion beam; 111. First mounting position; 112. First mounting hole; 113. First adhesive groove; 114. First limiting groove; 12. Second expansion beam; 121. Second mounting position; 122. Second mounting hole;

[0041] 2. Connecting parts;

[0042] 3. Battery module; 31. Battery pack; 32. End plate; 33. Limiting part. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0044] like Figure 1 and Figure 2 As shown, in a first aspect, an embodiment of the present invention provides an expansion beam structure 100, comprising:

[0045] A plurality of expansion beams 1, including at least a separately arranged first expansion beam 11 and a second expansion beam 12, the first expansion beam 11 and the second expansion beam 12 extending along a first direction, the first expansion beam 11 overlapping the second expansion beam 12 in a second direction, the second direction forming an angle with the first direction; and

[0046] Connector 2 is connected to the first expansion beam 11 and the second expansion beam 12.

[0047] In this embodiment of the invention, multiple expansion beams 1 are constructed using a separate first expansion beam 11 and second expansion beam 12, extending along a first direction. This design allows the length of the expansion beams in the first direction to be flexibly adjusted according to actual needs, adapting to different usage scenarios and installation requirements, thus greatly improving the versatility and applicability of the expansion beam structure 100. In related technologies, traditional expansion beam structures 100 are often integral with a fixed length, making it difficult to meet diverse usage needs. The separate, extended design of this invention effectively solves this problem.

[0048] Understandably, the function of connector 2 is to connect the first expansion beam 11 and the second expansion beam 12, thereby making the expansion beam structure 100 a whole. Connector 2 can be made of a metal material with high strength and good toughness, such as stainless steel or aluminum alloy. Connector 2 can be connected from the side of the first expansion beam 11 and the second expansion beam 12. This reduces damage to the end structure of the expansion beams, fully utilizes the overall structural performance of the expansion beams, and preserves the mechanical properties of the expansion beams in the length direction. At the same time, the side connection facilitates installation and disassembly, making maintenance and replacement of connector 2 or expansion beams more convenient, improving work efficiency and reducing maintenance costs.

[0049] In some embodiments, the first expansion beam 11 is provided with a first mounting position 111 on the side facing the second expansion beam 12, and the second expansion beam 12 is provided with a second mounting position 121 on the side corresponding to the first expansion beam 11; the connector 2 is provided at the overlapping part of the first expansion beam 11 and the second expansion beam 12, and connects the first mounting position 111 and the second mounting position 121 to fix the two together.

[0050] This configuration, with first mounting positions 111 and second mounting positions 121 respectively on the first expansion beam 11 and the second expansion beam 12, and the two connected and fixed using connector 2, enhances the stability and reliability of the connection between the two expansion beams. In practical applications, expansion beams may be subjected to various external forces, such as vibration, tension, and compression. Traditional connection methods may not guarantee the stability of the connection. However, the specific mounting positions and connector 2 in this technical solution can effectively resist these external forces, reduce the relative displacement and loosening between the expansion beams, thereby improving the safety and service life of the entire structure.

[0051] Specifically, the connector 2 can be a plate-like structure with connecting grooves at both ends that fit the first expansion beam 11 and the second expansion beam 12. The inner walls of the connecting grooves can be provided with anti-slip textures to enhance the stability of the connection. By inserting the first expansion beam 11 and the second expansion beam 12 into the connecting grooves respectively and fixing them with fasteners such as bolts and nuts, a tight connection between the connector 2 and the expansion beams is ensured. The connector 2 can also be designed as an adjustable-length structure. For example, it can be in the form of a telescopic rod with an internal telescopic sleeve structure. By adjusting the telescopic length of the sleeve, it can accommodate the connection of the first expansion beam 11 and the second expansion beam 12 with different length requirements. To achieve fixation after length adjustment, positioning holes and positioning pins can be provided on the telescopic rod. When the appropriate length is adjusted, the positioning pin is inserted into the positioning hole to fix the length of the telescopic rod.

[0052] In some embodiments, the first mounting position 111 includes a first mounting hole 112, which is disposed on the side of the first expansion beam 11 facing the second expansion beam; the second mounting position 121 includes a second mounting hole 122, which is disposed on the side of the second expansion beam 12 facing the first expansion beam, and the connector 2 passes through the first mounting hole 112 and the second mounting hole 122.

[0053] This configuration, with first mounting holes 112 and second mounting holes 122 respectively provided on opposite sides of the first expansion beam 11 and the second expansion beam 12, allows the connector 2 to pass through them, achieving an effective connection between the first expansion beam 11 and the second expansion beam 12. This connection method improves structural stability and reduces the likelihood of component loosening or separation due to vibration, external impact, etc., thus lowering the risk of equipment failure and extending the equipment's service life. Furthermore, this mounting hole configuration facilitates assembly and disassembly. During manufacturing, workers can easily insert the connector 2 into the first mounting holes 112 and second mounting holes 122, improving production efficiency and reducing production costs. During equipment maintenance or repair, the connector 2 can be quickly disassembled for inspection and replacement of the expansion beams, reducing downtime and improving equipment utilization.

[0054] Understandably, to further enhance the connection strength and sealing performance between the first expansion beam 11 and the second expansion beam 12, a special connection structure can be provided between them. Regarding connection strength, this structure employs a unique mechanical locking design. By providing matching protrusions and grooves on the mating surfaces of the first expansion beam 11 and the second expansion beam 12, the protrusions can tightly embed into the grooves when they are mated, forming a mechanical interlock. This design not only increases the contact area between the beams, making force transmission more uniform and reducing stress concentration, but also effectively resists relative displacement and rotation of the beams when subjected to external forces. For example, in practical applications, when the expansion beams are subjected to lateral tensile or shear forces, this connection structure can distribute the force throughout the entire connection area, reducing the localized breakage problems that may occur in traditional connection methods, greatly improving the reliability and stability of the connection, and extending the service life of the expansion beams. Furthermore, this connection structure is also equipped with specialized sealing components. Elastic sealing material is provided at the mating points of the protrusions and grooves. This sealing material possesses excellent flexibility and aging resistance, automatically filling minute gaps at the connection points when beams are joined, forming a reliable sealing barrier. Simultaneously, the sealing material exhibits a degree of self-healing capability, automatically restoring its sealing performance after minor compression or friction damage. Furthermore, this sealing assembly effectively prevents external moisture, dust, and chemicals from penetrating the beam's interior, reducing performance degradation caused by corrosion and contamination. For example, in humid environments, this sealing structure prevents moisture from entering the beam, protecting the internal structure from corrosion and ensuring the expansion beam maintains optimal working condition. However, employing this technical solution increases the overall complexity of the structure.

[0055] In view of this, in some embodiments, the first expansion beam 11 is recessed on the side facing the second expansion beam to form a first adhesive groove 113, and the third direction is arranged at an angle to the first and second directions; and / or,

[0056] The second expansion beam 12 has a second groove recessed on the side facing the first expansion beam, and the third direction is set at an angle to the first and second directions.

[0057] This design, with the presence of the glue groove, allows for a more uniform distribution of adhesive between the expansion beams. Compared to the absence of a glue groove, the adhesive can better fill the gaps between the expansion beams, enhancing the connection strength between the first expansion beam 11 and the second expansion beam 12. This is particularly important for devices subjected to significant external forces or vibrations, ensuring that the connection between the expansion beams will not easily loosen or separate under complex working environments, thus guaranteeing the normal operation of the device. When the first expansion beam 11 and the second expansion beam 12 are installed together, the adhesive in the glue groove can form a tighter seal at the joint. This seal effectively prevents external dust, moisture, and other impurities from entering the components, thereby improving the reliability and stability of the entire device, reducing the probability of malfunctions caused by impurities, and extending the service life of the device.

[0058] It can be understood that the purpose of the adhesive tank is to further apply adhesive to the two expansion beams without affecting the fit between their end outer contours, thereby improving the stability of their connection. Therefore, in some embodiments, multiple micro-protrusions can be provided on the inner wall of the adhesive tank. These micro-protrusions increase the contact area between the adhesive and the inner wall of the adhesive tank, allowing the adhesive to adhere more firmly to the tank and reducing waste or uneven distribution caused by excessive flow of adhesive during application. Simultaneously, the micro-protrusions also act as guides, directing the adhesive evenly to the mating surfaces of the two expansion beams. Several small drainage holes can also be provided at the bottom of the adhesive tank. During application, some adhesive will penetrate to a certain depth into the expansion beams through these drainage holes, further enhancing the bonding force between the adhesive and the expansion beams, thus improving the stability of the connection between the two expansion beams.

[0059] In addition, there are several implementation methods for the design of the adhesive groove. The width and depth of the adhesive groove can be precisely adjusted according to factors such as the material of the expansion beam and the expected stress. If the expansion beam is made of a softer material, the depth of the adhesive groove can be appropriately increased to accommodate more adhesive and enhance the connection strength; if the expansion beam is expected to bear a large lateral stress, the adhesive groove can be appropriately widened to better disperse the stress in the lateral direction.

[0060] Furthermore, multiple glue tanks can be provided, and these tanks can be spaced apart along the first direction. This increases flexibility and scalability. During subsequent production process improvements or new product development, parameters such as the number and spacing of the glue tanks can be easily adjusted to adapt to different production needs.

[0061] In some embodiments, the first adhesive groove 113 extends along a first direction; and / or,

[0062] The second adhesive groove extends along the first direction.

[0063] This configuration, extending the first glue tank 113 and / or the second glue tank along the first direction, effectively improves the uniformity of glue application. Because the glue tanks extend in the same direction, the glue experiences more consistent resistance and guidance during flow, reducing uneven glue distribution caused by irregular shapes or inconsistent directions of the glue tanks, thereby improving the glue application quality and stability of the product. Furthermore, the glue tanks extending along the first direction facilitate continuous glue application. Since the direction of the glue tanks is clear and consistent, the supply and flow of glue are smoother, reducing pauses and adjustment time during the glue application process, thus improving overall production efficiency.

[0064] like Figure 3 and Figure 4 As shown, in some embodiments, the expansion beam structure 100 further includes a first limiting groove 114, which is disposed on one side of the first expansion beam 11 along a third direction. The third direction is set at an angle to the first direction and the second direction. The first limiting groove 114 is used for the insertion of the limiting part 33 on the end plate 32; and / or,

[0065] The expansion beam structure 100 also includes a second limiting groove, which is disposed on one side of the second expansion beam 12 along a third direction. The third direction is set at an angle to the first direction and the second direction. The second limiting groove is used for the insertion of the limiting part 33 on the end plate 32.

[0066] This configuration, through the first and second limiting grooves, precisely restricts the relative position of the end plate 32 and the expansion beam. When the limiting part 33 on the end plate 32 is inserted into the corresponding limiting groove, it effectively prevents unnecessary displacement and shaking of the end plate 32 during use, greatly improving the stability and reliability of the entire structure. This precise limiting function is particularly important for applications with high structural stability requirements, such as in vibration environments or under large external forces, ensuring that the end plate 32 and the expansion beam maintain a tight and accurate connection, reducing the probability of failure and extending the service life of the equipment. During assembly, the limiting grooves provide clear positioning guidance for the installation of the end plate 32, allowing operators to quickly and accurately install the end plate 32 onto the expansion beam, reducing assembly difficulty and time costs.

[0067] Secondly, embodiments of this utility model provide a battery housing 200, including an expansion beam structure 100 employing all the above embodiments. Since the battery housing 200 adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.

[0068] In some embodiments, the battery housing 200 includes a housing with an expansion beam structure 100 disposed inside the housing to divide the internal cavity of the housing into a cell compartment and an electrical compartment.

[0069] This design divides the internal cavity of the battery box into a cell compartment and an electrical compartment via an expansion beam structure 100, achieving physical isolation between the cells and electrical components. This technical feature effectively reduces the adverse effects of heat and gases generated by the cells on electrical components during battery use. For example, it prevents electrical components from being damaged by overheating, reduces the probability of short circuits and other faults, and improves the safety and stability of the battery system.

[0070] Thirdly, embodiments of this utility model provide a battery pack 300, including a battery housing 200 employing all the above embodiments. Since the battery pack 300 adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.

[0071] like Figure 5 As shown, in some embodiments, the battery pack 300 further includes a battery module 3 disposed in the cell compartment. The battery module 3 includes a battery pack 31 and an end plate 32 disposed on the periphery of the battery pack 31. The end plate 32 and the battery pack 31 form an integral structure, and a limiting part 33 is provided on the side of the end plate 32 facing away from the battery pack 31. The limiting part 33 is engaged with at least one of the first limiting groove 114 and the second limiting groove.

[0072] With this configuration, the battery pack 31 and end plate 32 in the battery module 3 form an integrated structure. This integrated design improves the structural strength and stability of the battery module 3. The integrated structure reduces the connection gaps between components, lowering the risk of electrical failures caused by loosening or poor connection. The limiting part 33 on the side of the end plate 32 facing away from the battery pack 31 can be engaged with at least one of the first limiting groove 114 and the second limiting groove. This limiting design can accurately fix the position of the battery module 3 in the cell compartment, preventing displacement or shaking of the battery module 3 during use. Precise positioning helps ensure stable electrical connections between the battery modules 3, reducing problems such as loose connections and short circuits caused by displacement, further improving the safety and reliability of the battery pack 300.

[0073] Furthermore, it is worth noting that when the battery pack 300 is installed into the battery housing 200, it is necessary to apply adhesive to bond the battery module 3 to the battery housing 200 together. Therefore, a pressure-holding operation is required during this process to ensure that the two are firmly attached together. However, in this embodiment, when the limiting part 33 provided on the side of the end plate 32 facing away from the battery pack 31 can be engaged with at least one of the first limiting groove 114 and the second limiting groove, it can achieve the same pressure-holding effect, thereby reducing the need for additional pressure-holding operations.

[0074] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An expansion beam structure (100), characterized in that, include: Multiple expansion beams (1), including at least a first expansion beam (11) and a second expansion beam (12) separately arranged, the first expansion beam (11) and the second expansion beam (12) extending along a first direction, the first expansion beam (11) overlapping the second expansion beam (12) in a second direction, the second direction being at an angle to the first direction; and, The connector (2) is connected to the first expansion beam (11) and the second expansion beam (12).

2. The expansion beam structure (100) according to claim 1, characterized in that, The first expansion beam (11) has a first mounting position (111) on the side facing the second expansion beam (12), and the second expansion beam (12) has a second mounting position (121) on the side corresponding to the first expansion beam (11). The connector (2) is disposed at the overlapping position of the first expansion beam (11) and the second expansion beam (12), and connects the first mounting position (111) and the second mounting position (121) to fix them together.

3. The expansion beam structure (100) according to claim 2, characterized in that, The first mounting position (111) includes a first mounting hole (112), which is located on the side of the first expansion beam (11) facing the second expansion beam; The second mounting position (121) includes a second mounting hole (122), which is located on the side of the second expansion beam (12) facing the first expansion beam. The connector (2) passes through the first mounting hole (112) and the second mounting hole (122).

4. The expansion beam structure (100) according to claim 1, characterized in that, The first expansion beam (11) has a recessed first adhesive groove (113) on the side facing the second expansion beam, and the third direction is set at an angle to the first and second directions; and / or, The second expansion beam (12) has a second groove recessed on the side facing the first expansion beam, and the third direction is set at an angle to the first direction and the second direction.

5. The expansion beam structure (100) according to claim 4, characterized in that, The first adhesive groove (113) extends along a first direction; and / or, The second adhesive groove extends along the first direction.

6. The expansion beam structure (100) according to claim 1, characterized in that, The expansion beam structure (100) further includes a first limiting groove (114), which is disposed on one side of the first expansion beam (11) along a third direction, the third direction being set at an angle to the first direction and the second direction. The first limiting groove (114) is used for the insertion of a limiting part (33) on the end plate (32); and / or, The expansion beam structure (100) also includes a second limiting groove, which is disposed on one side of the second expansion beam (12) along a third direction. The third direction is set at an angle to the first direction and the second direction. The second limiting groove is used for the insertion of the limiting part (33) on the end plate (32).

7. A battery housing (200), characterized in that, Includes the expansion beam structure (100) as described in any one of claims 1-6.

8. The battery housing (200) according to claim 7, characterized in that, The battery box (200) includes a box body, and the expansion beam structure (100) is disposed inside the box body to divide the inner cavity of the box body into a cell compartment and an electrical compartment.

9. A battery pack (300), characterized in that, Includes the battery housing (200) as described in claim 7 or 8.

10. The battery pack (300) according to claim 9, characterized in that, The battery pack (300) also includes a battery module (3) disposed in the cell compartment. The battery module (3) includes a battery pack (31) and an end plate (32) disposed on the periphery of the battery pack (31). The end plate (32) and the battery pack (31) form an integral structure. A limiting part (33) is provided on the side of the end plate (32) facing away from the battery pack (31). The limiting part (33) is engaged with at least one of the first limiting groove (114) and the second limiting groove.

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