Locking crossbeam structure, battery lower box and battery pack

Abstract

This utility model discloses a locking crossbeam structure, a lower battery housing, and a battery pack. It includes a crossbeam, a locking crossbeam, and side sliders. The crossbeam has an internally hollow frame structure. A horizontally sliding locking crossbeam is fitted onto the top of the crossbeam. Both ends of the crossbeam and both ends of the locking crossbeam are engaged with the side sliders. The advantages of this utility model are that it reduces the weight of the locking crossbeam structure while maintaining its overall rigidity; and by engaging the ends of the crossbeam and the locking crossbeam with the side sliders, different lengths or sizes of the crossbeam ends and locking crossbeams can be used to meet the installation requirements of different battery packs, improving the versatility of the crossbeam structure on different battery packs and reducing costs.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a locking beam structure, a lower battery housing, and a battery pack. Background Technology

[0002] With the rapid development and iteration of the automotive industry, the cost of battery packs has become particularly prominent. Furthermore, electric vehicles encounter various complex operating conditions during operation. To enhance the battery pack's ability to cope with these conditions, its structural strength must be improved, and the design of the battery pack structure directly affects its overall safety performance. With increasing focus on safety and energy efficiency, battery pack safety performance has become increasingly important. With the development of new processes and technologies, battery pack structures have become more diverse. Moreover, with the continuous improvement of battery pack energy density, highly integrated battery pack structures are becoming increasingly crucial.

[0003] Most current battery packs adopt aluminum profile structure design, especially for large-capacity batteries. The entire battery pack is often large and heavy. The crossbeam structure in the battery pack directly affects the performance and safety of the entire pack. In the past, the design usually adopted a welded crossbeam structure, which resulted in poor compatibility between different battery packs and high cost. Utility Model Content

[0004] The technical problem to be solved by this utility model is how to improve the versatility of different battery packs while ensuring the rigidity of the crossbeam.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A locking beam structure includes a beam, a locking beam, and a side slider. The beam has a hollow frame structure. A horizontally sliding locking beam is sleeved on the top of the beam. Both ends of the beam and the locking beam are engaged with the side slider.

[0007] By designing the crossbeam as a hollow frame structure, the weight of the locking crossbeam structure is reduced, while the overall rigidity of the locking crossbeam structure is ensured through the design of the locking crossbeam. This achieves both weight reduction and overall rigidity of the locking crossbeam structure. Furthermore, by snapping the ends of the crossbeam and the locking crossbeam onto the side slider, the installation requirements of different battery packs can be met by replacing the crossbeam ends and the locking crossbeam with different lengths or sizes, thereby improving the versatility of the crossbeam structure on different battery packs and reducing costs.

[0008] Preferably, the crossbeam includes a lower crossbeam and an upper retaining sleeve. The lower crossbeam is provided with an internally hollow upper retaining sleeve, and the locking crossbeam is horizontally slidable within the upper retaining sleeve. Both ends of the lower crossbeam are engaged with the side slider.

[0009] Preferably, the top of the upper sleeve has a slot.

[0010] Preferably, the two end ports of the upper ferrule are arranged in a beveled shape.

[0011] Preferably, the locking cross beam is an integrally formed structure. The locking cross beam includes a locking cross beam body that can slide on the cross beam and a locking portion. Locking portions that can be clamped on the side sliders are provided at both ends of the locking cross beam body.

[0012] Preferably, the locking cross beam is a split structure and is respectively arranged at both ends of the top of the cross beam. The locking cross beam includes a locking cross beam body that can slide on the cross beam and a locking portion. A locking portion that can be clamped on the side slider is provided at one end of the locking cross beam body close to the side slider.

[0013] Preferably, on one side where two groups of side sliders face each other, upper and lower clamping grooves that are connected are provided from top to bottom. Both ends of the cross beam are clamped in the lower clamping groove, and both ends of the locking cross beam are clamped in the upper clamping groove.

[0014] Preferably, the groove width of the upper clamping groove is smaller than that of the lower clamping groove, and the width of the end portion of the cross beam clamped in the lower clamping groove is greater than the groove width of the upper clamping groove.

[0015] Preferably, the present utility model further provides a battery lower box body, which includes the above-mentioned locking cross beam structure, an annular frame, and longitudinal beams; a lower clamping groove is formed at the bottom of the cross beam, and the lower clamping groove on the locking cross beam structure is clamped with the longitudinal beam to form a cross-shaped structure. The cross-shaped structure is arranged inside the annular frame, and the side sliders on the locking cross beam structure are detachably arranged inside the annular frame.

[0016] Preferably, the present utility model further provides a battery pack, which includes the above-mentioned battery lower box body, a liquid cooling plate, a module, a module support member, an elastic support member, and a bottom protection plate. A bottom protection plate in a "field" shape is arranged at the bottom of the battery lower box body. An elastic support member and a module support member are sequentially arranged on the bottom protection plate from bottom to top. A module is arranged inside the battery lower box body, and a liquid cooling plate is further arranged on the top of the module.

[0017] Compared with the prior art, the beneficial effects of the present utility model are:

[0018] The present utility model can reduce the weight of the locking cross beam structure while ensuring the overall stiffness of the locking cross beam structure; and by clamping the end portion of the cross beam and the end portion of the locking cross beam on the side slider, different lengths or sizes of the cross beam end portion and the locking cross beam can be replaced to meet the installation requirements of different battery packs, improve the universality of the cross beam structure on different battery packs, and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0020] Figure 2This is a schematic diagram of the locking beam structure according to an embodiment of the present utility model;

[0021] Figure 3 This is another structural schematic diagram of the locking beam according to an embodiment of the present utility model;

[0022] Figure 4 This is a schematic diagram of the side slider in an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the lower battery housing according to an embodiment of the present invention;

[0024] Figure 6 This is an exploded view of the lower battery housing according to an embodiment of the present invention;

[0025] Figure 7 This is an exploded view of the battery pack according to an embodiment of the present invention.

[0026] In the diagram: 1. Crossbeam; 11. Lower crossbeam; 111. Lower locking groove; 12. Upper sleeve; 121. Groove; 2. Locking crossbeam; 21. Locking crossbeam body; 211. Inclined surface; 212. Groove; 22. Locking part; 3. Side slider; 31. Upper groove; 32. Lower groove; 4. Annular frame; 5. Longitudinal beam; 51. Upper locking groove; 6. Lifting lug; 7. Liquid cooling plate; 8. Module; 9. Module support; 10. Elastic support; 100. Bottom guard plate. Detailed Implementation

[0027] To facilitate understanding of the technical solution of this utility model by those skilled in the art, the technical solution of this utility model will now be further described in conjunction with the accompanying drawings.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] In this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically limited.

[0030] See Figure 1 This embodiment discloses a locking beam structure, including a beam 1, a locking beam 2, and a side slider 3.

[0031] The crossbeam 1 has a hollow frame structure, which can reduce the weight of the locking crossbeam structure. Specifically, the crossbeam 1 includes a lower crossbeam 11 and an upper retaining sleeve 12. The lower crossbeam 11 has a hollow frame structure, and the upper retaining sleeve 12 with a hollow interior and openings at both ends is horizontally arranged at the top of the lower crossbeam 11. The locking crossbeam 2 can be horizontally slidably arranged in the upper retaining sleeve 12. Furthermore, the locking crossbeam 2 and the upper retaining sleeve 12 are horizontally slidably assembled by a drawer. The locking crossbeam 2 enters from one end of the upper retaining sleeve 12 so that the locking crossbeam 2 can slide into the upper retaining sleeve 12, and the two ends of the locking crossbeam 2 extend out of the openings at both ends of the upper retaining sleeve 12.

[0032] The bottom of the lower crossbeam 11 is provided with a lower locking groove 111 for locking the longitudinal beam on the lower battery box.

[0033] Furthermore, the top 12 of the upper sleeve is provided with a slot 121 to avoid structures such as busbars.

[0034] Furthermore, the two ends of the upper sleeve 12 are designed with beveled openings to prevent the crossbeam 1 from being damaged by force and puncturing the insulation components, battery cells and other structures inside the battery pack, thus ensuring the performance and safety of the battery pack.

[0035] See Figure 2 In this embodiment, the locking beam 2 is an integrally formed structure and is a solid beam structure with high overall rigidity. In this embodiment, the weight of the locking beam structure is reduced by setting the beam 1 as a hollow frame structure, while the overall rigidity of the locking beam structure is ensured by setting the locking beam 2 as a solid beam structure with high rigidity. Thus, the weight of the locking beam structure is reduced while the overall rigidity of the locking beam structure is guaranteed.

[0036] The locking beam 2 includes a locking beam body 21 that can slide inside the upper sleeve 12 and a locking part 22. The locking beam body 21 has locking parts 22 at both ends that can be engaged with the side slider 3. Furthermore, the end face at the connection between the locking beam body 21 and the locking part 22 is also provided with a beveled surface 211 corresponding to the beveled end faces at both ends of the upper sleeve 12, so that after the locking beam 2 is installed, the beveled surface and the beveled end faces at both ends of the upper sleeve 12 are on the same plane.

[0037] Furthermore, when the height of the locking beam body 21 is higher than the bottom surface height of the slot 121, a groove 212 corresponding to the shape of the slot 121 is provided on the locking beam body 21.

[0038] See Figure 3The locking beam 2 can also be a split structure, with the locking beam 2 respectively located at both ends of the upper sleeve 12 and connected to the beam 1 by adhesive or pins to reduce the weight of the locking beam structure. The locking part 21 is located at the end of the locking beam body 21 near the side slider 3.

[0039] See Figure 1 and Figure 4 Side sliders 3 are provided at both ends of the crossbeam 1. The two sets of side sliders 3 have an upper slot 31 and a lower slot 32 connected from top to bottom on the opposite side. The two ends of the lower crossbeam 11 are respectively engaged in the lower slots 31 of the two sets of side sliders 3. The locking parts 22 at both ends of the locking crossbeam 2 are engaged in the upper slots 32 of the two sets of side sliders 3. The width of the upper slot 31 is smaller than the width of the lower slot 32, and the width of the end of the lower crossbeam 11 engaged in the lower slot 32 is larger than the width of the upper slot 31, so as to ensure that the lower crossbeam 11 will not be engaged in the upper slot 31, thereby ensuring that the lower crossbeam 11 will not move upward in the lower slot 32, thus limiting the lower crossbeam 11 in the vertical direction.

[0040] Furthermore, the side of the side slider 3 closest to the crossbeam 1 is the front side, and the upper slot 31 and the lower slot 32 are located in the middle of the front side. This front side is inclined upward from the two ends of the side slider towards the slots of the upper slot 31 and the lower slot 32.

[0041] Specifically, the installation process of the locking beam structure in this embodiment is as follows:

[0042] First, the one-piece locking beam 2 is inserted into one end of the upper sleeve 12 so that the locking beam 2 can slide into the upper sleeve 12, and the two ends of the locking beam 2 can extend out of the openings at both ends of the upper sleeve 12, so that the upper inclined surface 211 of the locking beam body 21 is flush with the inclined end face of the upper sleeve 12. Then, the corresponding snap-fit ​​groove 111 at the bottom of the lower beam 11 is snapped onto the upper longitudinal beam of the lower battery box. Then, the two sets of side sliders 3 slide down from top to bottom into the two ends of the locking beam 2 of the beam 1. Specifically, during the sliding of the side sliders 3, the upper slot 31 is set upward and the lower slot 32 is set downward. The locking part 22 first passes through the lower slot 32 and then snaps into the upper slot 31. At the same time, the lower beam 11 snaps into the lower slot 32 until the top wall of the lower slot 32 abuts against the top surface of the end of the lower beam 11, completing the sliding of the side sliders 3. Finally, it is fixed to the annular frame of the lower battery box by riveting.

[0043] See Figure 5 and Figure 6, this embodiment also discloses a battery lower box body, including the above-mentioned locking crossbeam structure, an annular frame 4, and a longitudinal beam 5. The lower clamping groove 111 on the locking crossbeam structure is clamped with the longitudinal beam 5 to form a cross-shaped structure, and the cross-shaped structure is arranged inside the annular frame 4. The back surface of the side slider 3 on the locking crossbeam structure is detachably connected to the inner wall of the annular frame, and specifically, the connection can be achieved through gluing, riveting, clamping, etc.

[0044] Furthermore, an upper clamping groove 51 is provided on the upper part of the longitudinal beam 5, and the clamping groove 111 at the bottom of the lower crossbeam 11 is correspondingly clamped on the upper clamping groove 51, which not only realizes the clamping of the crossbeam 1 and the longitudinal beam 5, but also prevents the shaking after the crossbeam 1 and the longitudinal beam 5 are clamped.

[0045] Furthermore, a plurality of detachable lifting lugs 6 are also provided on the outer side of the annular frame 4; specifically, according to the size, weight, and performance requirements of the battery pack, by assembling a plurality of detachable lifting lugs 6, the lifting performance requirements and stiffness requirements of the battery lower box body can be met. In this embodiment, the number of lifting lugs 6 cannot be too small. If the number of lifting lugs 6 is too small, the force borne by the lifting lugs 6 during the lifting of the battery pack will be too large, resulting in the detachment of the lifting lugs 6 from the annular frame 4, and it is necessary to ensure that the lifting lugs 6 are evenly stressed.

[0046] The lifting lugs 6 are all of a mesh structure, and the connection methods with the lower box body are mainly welding, gluing, clamping, etc. according to the actual situation.

[0047] Refer to Figure 7 , this embodiment also discloses a battery pack, including the above-mentioned battery lower box body.

[0048] Furthermore, the battery pack further includes a liquid cooling plate 7, a module 8, a module support 9, an elastic support 10, and a bottom guard plate 100. A bottom guard plate 100 in a "field" shape is arranged at the bottom of the battery lower box body, and an elastic support 10 and a module support 9 are sequentially arranged on the bottom guard plate 100 from bottom to top. Since the cross-shaped structure formed by the clamping of the locking crossbeam structure and the longitudinal beam 5 is arranged inside the annular frame 4, the inner part of the annular frame 4 is divided into four cavity parts to accommodate four groups of modules 8, and a liquid cooling plate 7 is also provided on the top of the four groups of modules 8.

[0049] Among them, the liquid cooling plate 7 has functions such as cooling, temperature equalization, and support for the module 8; the liquid cooling plate 7 is bonded to the module 8 through a thermal conductive structural adhesive, and the liquid cooling plate adhesive can provide heat conduction and connection functions; the liquid cooling plate 7 is connected to the battery lower box body by bolts.

[0050] In this embodiment, the weight of the locking beam structure is reduced by setting the crossbeam 1 as a hollow frame structure, while the overall rigidity of the locking beam structure is ensured by setting the locking beam 2. Thus, the weight of the locking beam structure is reduced while the overall rigidity of the locking beam structure is maintained. Furthermore, the ends of the crossbeam 1 and the locking beam 2 are snapped onto the side slider. By replacing the ends of the crossbeam 1 and the locking beam 2 with different lengths or sizes, the installation requirements of different battery packs can be met, improving the versatility of the beam structure on different battery packs and reducing costs.

[0051] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0052] The above-described embodiments are merely examples of implementation methods of the utility model. The scope of protection of this utility model is not limited to the above-described embodiments. For those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and these all fall within the scope of protection of this utility model.

Claims

1. A lock beam structure, characterized by: It includes a cross beam, a locking cross beam and side sliders. The cross beam has a frame structure with a hollow interior. A horizontally slidable locking cross beam is sleeved on the top of the cross beam. Both ends of the cross beam and both ends of the locking cross beam are clamped on the side sliders.

2. The locking crossbeam structure according to claim 1, characterized in that: The cross beam includes a lower cross beam and an upper clamping sleeve. An upper clamping sleeve with a hollow interior is arranged on the lower cross beam. The locking cross beam is horizontally slidably arranged in the upper clamping sleeve. Both ends of the lower cross beam are clamped with the side sliders.

3. The locking crossbeam structure according to claim 2, characterized in that: A notch is formed at the top of the upper clamping sleeve.

4. The locking crossbeam structure according to claim 2, characterized in that: The two end ports of the upper clamping sleeve are arranged in a bevel shape.

5. The locking crossbeam structure of claim 1, wherein: The locking cross beam is an integrally formed structure. The locking cross beam includes a locking cross beam body that can slide on the cross beam and a locking part. Locking parts that can be clamped on the side sliders are arranged at both ends of the locking cross beam body.

6. The locking crossbeam structure of claim 1, wherein: The locking cross beam is a split structure and is respectively arranged at both ends of the top of the cross beam. The locking cross beam includes a locking cross beam body that can slide on the cross beam and a locking part. A locking part that can be clamped on the side sliders is arranged at one end of the locking cross beam body close to the side slider.

7. The locking crossbeam structure of claim 1, wherein: On one side of the two groups of side sliders facing each other, upper clamping grooves and lower clamping grooves that are connected are provided from top to bottom. Both ends of the cross beam are clamped in the lower clamping grooves, and both ends of the locking cross beam are clamped in the upper clamping grooves.

8. The locking crossbeam structure according to claim 7, characterized in that: The groove width of the upper clamping groove is smaller than that of the lower clamping groove, and the width of the end of the cross beam clamped in the lower clamping groove is greater than the groove width of the upper clamping groove.

9. A battery lower case characterized by: It includes the locking cross beam structure described in any one of claims 1-8, as well as an annular frame and a longitudinal beam. A lower clamping groove is formed at the bottom of the cross beam. The lower clamping groove on the locking cross beam structure is clamped with the longitudinal beam to form a cross-shaped structure. The cross-shaped structure is arranged in the annular frame. The side sliders on the locking cross beam structure are detachably arranged in the annular frame.

10. A battery pack, characterized by: It includes the battery lower box body described in claim 9, as well as a liquid cooling plate, a module, a module support, an elastic support, and a bottom guard plate. A bottom guard plate in a "field" shape is arranged at the bottom of the battery lower box body. An elastic support and a module support are sequentially arranged on the bottom guard plate from bottom to top. A module is arranged inside the battery lower box body, and a liquid cooling plate is further arranged on the top of the module.

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