A battery box, a stacked battery box module, and a battery system

Abstract

The utility model provides a kind of battery box, including bottom plate and multiple frames connected with each other, and bottom plate and multiple frames are enclosed to form the installation cavity for loading battery;At least one frame includes side plate and at least one first support rib, first support rib and side plate constitute integrated structure, side plate includes first inner cavity, first support rib is located in first inner cavity, side plate is also provided with protective layer to the side of installation cavity, protective layer and side plate constitute integrated structure, the side of installation cavity of protective layer is welded and connected with bottom plate, and second inner cavity is provided in protective layer.The technical scheme of the utility model can reduce the thermal deformation generated by side plate, reduce the influence of thermal deformation on the connection strength and service life of side plate.

Description

Technical Field

[0001] This utility model relates to the field of stacked battery system technology, specifically to a battery housing, a stacked battery housing module, and a battery system. Background Technology

[0002] In the related technologies, the first-generation heavy-duty truck stacked battery system box adopts a cavity structure design to solve the technical problems of using external welding of additional support brackets to improve the strength of the battery box in the existing technology. The bottom of the upper box is the cover of the lower box, and the top layer is locked to the box with the cover. However, this has the technical problems of excessive welding, low weld strength, and easy cracking of the weld under long-term load, which affects the stability of the system.

[0003] However, when the cavity structure is welded to the base plate, it will cause thermal deformation of the cavity structure, which will affect the connection strength and service life of the cavity structure. Utility Model Content

[0004] The embodiments of this utility model provide a battery box, a stacked box module, and a battery system, which can reduce thermal deformation of the side panels and reduce the impact of thermal deformation on the connection strength and service life of the side panels.

[0005] In a first aspect, an embodiment of the present invention provides a battery housing, including a base plate and a plurality of side frames connected to each other, wherein the base plate and the plurality of side frames enclose a mounting cavity for loading batteries;

[0006] At least one of the frame components includes a side plate and at least one first support rib. The first support rib and the side plate form an integral structure. The side plate includes a first inner cavity. The first support rib is disposed in the first inner cavity. The side plate facing the mounting cavity is also provided with a protective layer. The protective layer and the side plate form an integral structure. The side of the protective layer facing the mounting cavity is welded to the bottom plate. The protective layer is provided with a second inner cavity.

[0007] In one embodiment, the side plate extends along a first direction, the first inner cavity is arranged along the first direction, the first support rib is arranged along a second direction, and the second direction is arranged at an angle to the first direction.

[0008] In the technical solution of this embodiment, a spatial grid structure is formed by the cross arrangement of the side plate and the first supporting rib, and the bending stiffness and torsional stiffness of the overall structure are significantly improved by the angle design between the first direction and the second direction.

[0009] In one embodiment, the first support rib extends along a first direction, and the first support rib intermittently forms a plurality of first cavities in the first inner cavity.

[0010] In the technical solution of this embodiment, the connection strength of the overall structure can be further improved by extending the first support rib. In addition, multiple cavities help to maintain the overall lightweight and save materials.

[0011] In one embodiment, the cross-section of the plurality of first cavities perpendicular to the first direction is polygonal.

[0012] In the technical solution of this embodiment, by setting the cross-sections of multiple first cavities perpendicular to the first direction as polygons, the stability and deformation resistance of the cavity structure can be effectively improved. Compared with circular or other curved cross-sections, polygonal cross-sections have higher structural stiffness when subjected to external forces. When multiple cavities are arranged side by side, they can better resist the mutual compression between adjacent cavities, thereby maintaining the integrity of the cavity shape.

[0013] In one embodiment, the cross-section of at least one first cavity located at the end of the side plate away from the bottom plate is polygonal, and the cross-section of at least one first cavity located at the end of the side plate near the bottom plate is triangular.

[0014] In this embodiment, by setting the first cavity located at the end of the side plate away from the bottom plate as a polygonal cross-section, the material usage can be reduced and the manufacturing cost lowered while ensuring structural strength. Conversely, the first cavity located at the end of the side plate closer to the bottom plate uses a triangular cross-section, which effectively increases the stability and load-bearing capacity of the structure, thereby improving the overall connection strength and promoting uniform stress distribution, reducing structural failures caused by stress concentration.

[0015] In one embodiment, at least one second support rib is further provided in the second inner cavity, and the protective layer and the second support rib form an integral structure.

[0016] In this embodiment, the structural strength of the second inner cavity is enhanced by the addition of the second supporting rib, preventing deformation or collapse caused by external forces during use, thus improving the product's service life and reliability. Secondly, the integrated structural design of the protective layer and the second supporting rib not only simplifies the manufacturing process and reduces production costs, but also strengthens the bond between the two, reducing the occurrence of defects such as delamination or detachment.

[0017] In one embodiment, a fixing hole is provided at one end of the side plate near the bottom plate, and an opening communicating with the first inner cavity is provided on the side of the side plate facing away from the mounting cavity. An mounting hole is provided at one end of the side plate away from the bottom plate. The fixing hole and the mounting hole are arranged opposite each other in a third direction, and the third direction is set at an angle with both the first direction and the second direction.

[0018] In the technical solution of this embodiment, by providing a fixing hole at one end of the side plate near the bottom plate and a mounting hole at the other end away from the bottom plate, and by making the fixing hole and the mounting hole opposite each other along a third direction, it is advantageous for multiple battery boxes to be stacked together to complete the alignment assembly. In addition, the window setting facilitates the operation when installing connectors in the mounting holes.

[0019] In one embodiment, a cooling channel is formed inside the base plate, the cooling channel covering at least a portion of the mounting cavity for cooling the bottom of the battery located in the mounting cavity.

[0020] In the technical solution of this embodiment, the bottom of the battery can be cooled through a cooling channel.

[0021] Secondly, embodiments of this utility model provide a stacked battery housing module, including a battery housing, which includes the battery housing described in the above embodiments. Multiple battery housings are provided, and the multiple battery housings are stacked along a third direction.

[0022] Thirdly, embodiments of this utility model provide a battery system including a stacked battery housing module, wherein the stacked battery housing module includes the stacked battery housing module described in the above embodiments.

[0023] The beneficial effects of the embodiments of this utility model are as follows:

[0024] In an embodiment of this utility model, the battery housing includes an interconnected base plate and multiple side frames, which together form a mounting cavity for loading the battery. At least one side frame includes a side plate and at least one first support rib. The first support rib and the side plate form an integral structure. The side plate includes a first inner cavity, and the first support rib is disposed in the first inner cavity. A protective layer is also provided on the side of the side plate facing the mounting cavity. The protective layer and the side plate form an integral structure. The side of the protective layer facing the mounting cavity is welded to the base plate, and a second inner cavity is provided within the protective layer. During installation, the protective layer can be welded to the base plate, keeping the side plate away from the weld, thereby reducing thermal deformation caused by welding heat. This reduces the impact of thermal deformation on the connection strength and service life of the side plate. Furthermore, the integrated structure can further improve the connection strength, which is beneficial to the overall stability. This improves the technical problem that when the cavity structure is welded to the base plate, thermal deformation of the cavity structure occurs, which affects the connection strength and service life of the cavity structure. Attached Figure Description

[0025] 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.

[0026] Figure 1 This is a perspective view of the battery box provided in an embodiment of the present utility model;

[0027] Figure 2 yes Figure 1 An exploded view of the battery compartment.

[0028] Figure 3 yes Figure 1 A sectional view of the battery compartment in the middle;

[0029] Figure 4 yes Figure 1 A cross-sectional view of the border in the middle;

[0030] Figure 5 yes Figure 1 Enlarged image;

[0031] Figure 6 A three-dimensional schematic diagram of a stacked battery box module provided in an embodiment of this utility model.

[0032] Explanation of reference numerals in the attached figures:

[0033] 100. Battery housing; 200. Stacked battery housing module;

[0034] 1. Base plate; 11. Mounting cavity; 12. Cooling channel;

[0035] 2. Frame; 21. Side panel; 22. First inner cavity; 221. First cavity; 23. First support rib; 24. Protective layer; 25. Second inner cavity; 26. Second support rib; 27. Fixing hole; 28. Window; 29. ​​Mounting hole. Detailed Implementation

[0036] 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.

[0037] In related technologies, the first-generation heavy-duty truck stacked battery system enclosure utilizes a cavity structure design to address the shortcomings of existing technologies that rely on externally welded support brackets to enhance battery enclosure strength. The upper enclosure serves as the cover for the lower enclosure, with the top layer secured to the enclosure by a cover. However, this design suffers from excessive welding, low weld strength, and a tendency for weld cracking under long-term loads, impacting system stability. Furthermore, welding the cavity structure to the base plate causes thermal deformation, affecting its connection strength and lifespan.

[0038] To solve the above technical problems, such as Figure 1 and Figure 2 As shown, in a first aspect, an embodiment of the present invention provides a battery box 100, including a bottom plate 1 and a plurality of side frames 2 connected to each other, the bottom plate 1 and the plurality of side frames 2 enclosing a mounting cavity 11 for loading batteries; at least one side frame 2 includes a side plate 21 and at least one first support rib 23, the first support rib 23 and the side plate 21 forming an integral structure, the side plate 21 includes a first inner cavity 22, the first support rib 23 is disposed in the first inner cavity 22, the side plate 21 facing the mounting cavity 11 is also provided with a protective layer 24, the protective layer 24 and the side plate 21 forming an integral structure, the side of the protective layer 24 facing the mounting cavity 11 is welded to the bottom plate 1, and the protective layer 24 is provided with a second inner cavity 25.

[0039] In an embodiment of this utility model, the battery housing 100 includes an interconnected base plate 1 and multiple side frames 2, which together form a mounting cavity 11 for loading batteries. At least one side frame 2 includes a side plate 21 and at least one first support rib 23. The first support rib 23 and the side plate 21 form an integral structure. The side plate 21 includes a first inner cavity 22, and the first support rib 23 is disposed in the first inner cavity 22. A protective layer 24 is also provided on the side of the side plate 21 facing the mounting cavity 11. The protective layer 24 and the side plate 21 form an integral structure. The side of the protective layer 24 facing the mounting cavity 11 is welded to the base plate 1. A second inner cavity 25 is provided within the protective layer 24. During installation, the protective layer 24 can be welded to the base plate 1, keeping the side plate 21 away from the weld, thereby reducing thermal deformation caused by welding heat. This reduces the impact of thermal deformation on the connection strength and service life of the side plate 21. Furthermore, the integrated structure can further improve the connection strength, which is beneficial to the overall stability. This improves the technical problem that when the cavity structure is welded to the base plate 1, thermal deformation of the cavity structure will occur, which will affect the connection strength and service life of the cavity structure.

[0040] like Figure 3 and Figure 4 As shown, it should be noted that while one or more frame 2s can be used, this application employs two frame 2s to enhance the uniformity of structural strength. These two frame 2s are positioned opposite each other, providing support and reinforcement to the overall structure in multiple directions, thereby effectively improving the product's structural strength and stability. Furthermore, by optimizing the number and distribution of frame 2s, the uniformity of stress distribution under load can be further improved, reducing the risk of structural failure caused by localized stress concentration.

[0041] It is understood that there can be multiple first support ribs 23, which are spaced apart in the first inner cavity 22 to improve the structural strength and stability of the side plate 21. In some embodiments, the multiple first support ribs 23 can be arranged linearly, in a matrix, or non-uniformly distributed according to the support stress requirements to adapt to different load-bearing requirements. Furthermore, the cross-sectional shape of the first support ribs 23 can be rectangular, trapezoidal, circular, or polygonal, or a combination thereof, which can be selected according to the manufacturing process and strength requirements. Further, the first support ribs 23 can be connected to the support plate through an integral molding process to improve the reliability of the overall structure and simplify the assembly process. In other embodiments, the first support ribs 23 can also be fixed to the support plate using a detachable connection method to facilitate maintenance, replacement, or structural adjustment.

[0042] In order to improve the supporting effect of the first supporting rib 23, in one embodiment, the side plate 21 extends along the first direction, the first inner cavity 22 is arranged along the first direction, and the first supporting rib 23 is arranged along the second direction, with the second direction forming an angle with the first direction.

[0043] In the technical solution of this embodiment, a spatial grid structure is formed by the cross arrangement of the side plate 21 and the first support rib 23. The angle design between the first direction and the second direction significantly improves the bending stiffness and torsional stiffness of the overall structure.

[0044] Understandably, the first support rib 23 is partially positioned on the side plate 21 in the first direction to reduce the overall weight.

[0045] However, in order to improve the overall strength, in one embodiment, the first support rib 23 is extended along the first direction, and the first support rib 23 intermittently forms a plurality of first cavities 221 in the first inner cavity 22.

[0046] In the technical solution of this embodiment, the extension of the first support rib 23 can further enhance the connection strength of the overall structure. In addition, multiple cavities help maintain the overall lightweight and save materials.

[0047] It is understandable that the cross-section of the first cavity 221 perpendicular to the first direction can be different shapes such as circular, elliptical or irregular, to adapt to different structural requirements.

[0048] In one embodiment, the cross-sections of the plurality of first cavities 221 perpendicular to the first direction are polygonal.

[0049] In the technical solution of this embodiment, by setting the cross-section of the multiple first cavities 221 perpendicular to the first direction as polygons, the stability and deformation resistance of the cavity structure can be effectively improved. Compared with circular or other curved cross-sections, polygonal cross-sections have higher structural stiffness when subjected to external forces. When multiple cavities are arranged side by side, they can better resist the mutual compression between adjacent cavities, thereby maintaining the integrity of the cavity shape.

[0050] Understandably, the first cavity 221 can be partially or entirely triangular. However, this is done to ensure strength and lightweight design.

[0051] Since the bottom of the side plate 21 is the main load-bearing part, in view of this, in one embodiment, at least one first cavity 221 located at the end of the side plate 21 away from the bottom plate 1 has a polygonal cross section, and at least one first cavity 221 located at the end of the side plate 21 near the bottom plate 1 has a triangular cross section.

[0052] In the technical solution of this embodiment, by setting the first cavity 221 located at the end of the side plate 21 away from the bottom plate 1 as a polygonal cross section, it is possible to reduce material usage and manufacturing costs while ensuring structural strength. Conversely, the first cavity 221 located at the end of the side plate 21 closer to the bottom plate 1 adopts a triangular cross section, which can effectively increase the stability and load-bearing capacity of the structure, thereby improving the overall connection strength and facilitating the uniform distribution of stress, reducing structural failure caused by stress concentration.

[0053] It is understandable that the second inner cavity 25 is closer to the side plate 21, and its thickness is less than that of the first inner cavity 22. Therefore, it is not necessary to set an additional support structure in the second inner cavity 25. However, in order to further enhance the connection strength.

[0054] In one embodiment, at least one second support rib 26 is also provided in the second inner cavity 25, and the protective layer 24 and the second support rib 26 form an integral structure.

[0055] In this embodiment, the second supporting rib 26 enhances the structural strength of the second inner cavity 25, preventing deformation or collapse caused by external forces during use, thus improving the product's service life and reliability. Secondly, the integrated structural design of the protective layer 24 and the second supporting rib 26 not only simplifies the manufacturing process and reduces production costs, but also strengthens the bond between the two, reducing the occurrence of defects such as delamination or detachment.

[0056] It is understood that the battery box 100 can be used individually or in combination. When the battery boxes 100 are stacked, it is necessary to ensure that the connection between each box is firm and reliable, and meets the load-bearing requirements of the overall structure. Interlocking positioning and load-bearing structures are provided at the bottom and top of the battery boxes 100, such as convex-concave positioning protrusions and grooves, or connecting buckles with locking functions, to ensure the alignment accuracy and connection strength between the battery boxes 100 when stacked. In addition, mechanical connectors, such as bolts and locking rods, can be provided between the battery boxes 100 to enhance the rigidity and shock resistance of the overall structure, meeting the mechanical requirements during transportation and installation.

[0057] like Figure 5 As shown, specifically, in one embodiment, a fixing hole 27 is provided at one end of the side plate 21 near the bottom plate 1, and a window 28 communicating with the first inner cavity 22 is provided on the side of the side plate 21 facing away from the mounting cavity 11. A mounting hole 29 is provided at one end of the side plate 21 away from the bottom plate 1. The fixing hole 27 and the mounting hole 29 are arranged opposite each other in a third direction, and the third direction is set at an angle with both the first direction and the second direction.

[0058] In this embodiment, by providing a fixing hole 27 at one end of the side plate 21 near the bottom plate 1 and a mounting hole 29 at the end away from the bottom plate 1, and by arranging the fixing hole 27 and the mounting hole 29 opposite each other along a third direction, it is advantageous for multiple battery boxes 100 to be stacked together for alignment and assembly. Furthermore, the opening 28 facilitates the installation of connectors through the mounting hole 29. This also facilitates the insertion of installation tools or connecting components, further improving assembly efficiency and operability.

[0059] In one embodiment, a cooling channel 12 is formed inside the base plate 1, which at least partially covers the mounting cavity 11 for cooling the bottom of the battery located in the mounting cavity 11.

[0060] In this embodiment, the bottom of the battery can be cooled by the cooling channel 12. Furthermore, it is worth mentioning that when multiple battery cases 100 are stacked, the cooling channel 12 on the bottom plate 1 of the upper battery case 100 can cool the top of the batteries in the lower battery case 100, thereby improving cooling efficiency.

[0061] like Figure 6 As shown, in a second aspect, embodiments of the present invention provide a stacked battery housing module 200, including a battery housing 100, which includes the battery housing 100 described in the above embodiments. Multiple battery housings 100 are provided, and the multiple battery housings 100 are stacked along a third direction. Since the stacked battery housing module 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 further here.

[0062] Thirdly, embodiments of this utility model provide a battery system including a stacked battery housing module 200, which includes the stacked battery housing module 200 described in the above embodiments. Since the battery system employs 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.

[0063] 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. A battery housing (100), characterized in that, It includes an interconnected base plate (1) and a plurality of side frames (2), the base plate (1) and the plurality of side frames (2) enclosing a mounting cavity (11) for loading a battery; At least one of the frame (2) includes a side plate (21) and at least one first support rib (23), the first support rib (23) and the side plate (21) form an integral structure, the side plate (21) includes a first inner cavity (22), the first support rib (23) is disposed in the first inner cavity (22), the side plate (21) facing the mounting cavity (11) is also provided with a protective layer (24), the protective layer (24) and the side plate (21) form an integral structure, the protective layer (24) facing the mounting cavity (11) is welded to the bottom plate (1), and the protective layer (24) is provided with a second inner cavity (25).

2. The battery housing (100) according to claim 1, characterized in that, The side plate (21) extends along a first direction, the first inner cavity (22) is arranged along the first direction, and the first support rib (23) is arranged along a second direction, with the second direction forming an angle with the first direction.

3. The battery housing (100) according to claim 2, characterized in that, The first support rib (23) extends along the first direction and the first support rib (23) intermittently forms a plurality of first cavities (221) in the first inner cavity (22).

4. The battery housing (100) according to claim 3, characterized in that, The cross-section of the plurality of first cavities (221) perpendicular to the first direction is polygonal.

5. The battery housing (100) according to claim 4, characterized in that, At least one first cavity (221) located at the end of the side plate (21) away from the bottom plate (1) has a polygonal cross section, and at least one first cavity (221) located at the end of the side plate (21) near the bottom plate (1) has a triangular cross section.

6. The battery housing (100) according to claim 1, characterized in that, The second inner cavity (25) is also provided with at least one second support rib (26), and the protective layer (24) and the second support rib (26) form an integral structure.

7. The battery housing (100) according to claim 1, characterized in that, The side plate (21) has a fixing hole (27) at one end near the bottom plate (1). The side plate (21) facing away from the mounting cavity (11) has an opening (28) that connects to the first inner cavity (22). The side plate (21) away from the bottom plate (1) has a mounting hole (29). The fixing hole (27) and the mounting hole (29) are arranged opposite each other in a third direction. The third direction is set at an angle to both the first direction and the second direction.

8. The battery housing (100) according to claim 1, characterized in that, The base plate (1) has a cooling channel (12) inside, which covers at least part of the mounting cavity (11) for cooling the bottom of the battery located in the mounting cavity (11).

9. A stacked battery box module (200), characterized in that, The battery housing (100) as described in any one of claims 1-8 is provided in a plurality of such battery housings (100), and the plurality of such battery housings (100) are stacked along a third direction.

10. A battery system, characterized in that, Includes the stacked battery housing module (200) as described in claim 9.

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