A battery pack and vehicle

Abstract

The application discloses a battery pack and a vehicle, and belongs to the technical field of vehicle batteries. The battery pack comprises a support structure and a battery module. The support structure comprises a first support and a second support. The first support is arranged on a bottom plate of a battery box body, and the first support has a first accommodating space. The second support is arranged on a side of the first support away from the bottom plate of the battery box body, and the second support has a second accommodating space. A positioning block is arranged on a side of the first support facing the second support, and the second support is provided with an additional beam. The additional beam is connected with the positioning block. The battery module comprises a first module and a second module. The first module is arranged in the first accommodating space, and the second module is arranged in the second accommodating space. The combined mounting mode of the layer-by-layer arranged support structure and the battery module significantly improves the space utilization rate of the battery pack, and effectively improves the volume energy density of the whole battery system.

Description

Technical Field

[0001] This application relates to the field of automotive battery technology, and more particularly to a battery pack and a vehicle. Background Technology

[0002] With the rapid development of the new energy industry, improving the energy density and space utilization of battery systems has become a key industry requirement. Currently, to increase vehicle battery capacity, a common practice is to stack two independent single-layer battery modules one on top of the other and weld each module to the battery housing. However, this method often results in a significant increase in the height of the battery housing and an enlarged overall size, which is detrimental to vehicle layout and lightweight design. Furthermore, this type of welding fixation is difficult to disassemble, severely restricting the flexibility of battery pack maintenance and module replacement. Utility Model Content

[0003] This application provides a battery pack and vehicle to solve the problems of large space occupation by simple stacking of battery modules and difficulties in battery pack maintenance and replacement.

[0004] To achieve the above objectives, according to a first aspect of this application, a battery pack is provided, the battery pack comprising: The bracket structure includes a first bracket and a second bracket; the first bracket is disposed on the bottom plate of the battery box and has a first accommodating space; the second bracket is disposed on the side of the first bracket away from the bottom plate of the battery box and has a second accommodating space; a positioning block is provided on the side of the first bracket facing the second bracket, and an additional beam is provided on the second bracket; the additional beam is connected to the positioning block. A battery module, comprising a first module and a second module; the first module is disposed in the first accommodating space; and the second module is disposed in the second accommodating space.

[0005] In some embodiments, the positioning block includes a horizontal portion and vertical portions disposed on both sides of the horizontal portion, wherein the end of the vertical portion away from the horizontal portion is connected to the first bracket; The additional beam has a slot on the side away from the positioning block, and the slot corresponds to the positioning block; The positioning block is connected to the additional beam by bolts; the head of the bolt or the nut is accommodated in the slot.

[0006] In some embodiments, the first support includes a plurality of plate beams connected end to end; The second support includes multiple side plates and a support plate; the multiple side plates are connected end to end around the periphery of the support plate and are located on the side of the support plate away from the first support.

[0007] In some embodiments, the first support is a rectangular frame, and the plate beams sequentially include a first plate beam, a second plate beam, a third plate beam, and a fourth plate beam; The second bracket is a rectangular box with an open top, and the side panels include a first side panel, a second side panel, a third side panel, and a fourth side panel in sequence.

[0008] In some embodiments, the first plate beam and the third plate beam are respectively the two long side beams of the first support; the first side plate and the third side plate are respectively the two long side plates of the second support; The positioning blocks are spaced apart on the first plate beam and the third plate beam; The additional beam is disposed on the first side plate and the third side plate, and the axial direction of the additional beam is the same as the length direction of the second bracket.

[0009] In some embodiments, the first plate beam and the third plate beam are respectively provided with connecting portions at both ends, and the connecting portions are connected to the side wall of the battery box.

[0010] In some embodiments, a mounting beam is provided on the side wall of the battery box, and a connecting groove is provided on the side of the mounting beam facing the battery pack, the connecting groove extending along the axial direction of the mounting beam; The end of the connecting part is provided with a protrusion, which is accommodated in the connecting groove and welded to the mounting beam.

[0011] In some embodiments, the additional beam is an aluminum alloy square tube with a rectangular cross-section.

[0012] In some embodiments, the plate beam includes a box-section beam made of aluminum alloy; the side plate includes an outer panel, an inner panel, and reinforcing ribs connecting the two; the load-bearing plate includes an aluminum alloy liquid-cooled plate; and the battery box bottom plate has the same structure as the load-bearing plate.

[0013] According to a second aspect of this application, a vehicle is provided, the vehicle including the battery pack provided in the first aspect of this application.

[0014] Beneficial effects: The layered support structure and the combination of battery modules significantly improve the space utilization inside the battery pack, thereby effectively increasing the volumetric energy density of the entire battery system; the mechanical connection between the positioning blocks and the additional beams effectively replaces the traditional welding process, significantly reducing the risk of box deformation and improving structural accuracy and reliability.

[0015] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0017] Figure 1 This is a schematic diagram of the disassembly structure of a battery pack provided in an exemplary embodiment of this disclosure; Figure 2 This is a schematic diagram of the assembly structure of the battery pack provided in an exemplary embodiment of this disclosure; Figure 3 This is a schematic diagram of the installation of the first bracket provided in an exemplary embodiment of this disclosure; Figure 4 This is a public announcement Figure 3 Enlarged view of the structure at point A in the image; Figure 5 This is a schematic diagram of the structure of the second support provided in an exemplary embodiment of this disclosure; Figure 6 This is a schematic diagram of the structure of the support plate provided in an exemplary embodiment of this disclosure.

[0018] Explanation of reference numerals in the attached figures: 11. First support; 111. First plate beam; 112. Second plate beam; 113. Third plate beam; 114. Fourth plate beam; 115. Positioning block; 116. Connecting part; 12. Second support; 121. First side plate; 122. Second side plate; 123. Third side plate; 124. Fourth side plate; 125. Load-bearing plate; 126. Additional beam; 21. First Module; 22. Second module; 31. Battery box bottom plate; 32. Install the beam. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0020] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, 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, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between 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.

[0022] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0023] To increase vehicle battery capacity, a common practice is to stack two independent single-layer battery modules one on top of the other and weld each module to the battery housing. However, this method has significant drawbacks in structural design and assembly processes. First, the lack of an efficient and reliable connection structure between the upper brackets, relying heavily on welding for fixation, not only introduces the risk of thermal deformation and affects dimensional accuracy but also makes maintenance and replacement extremely inconvenient. Second, the increased overall height after stacking the double-layer modules places higher demands on the housing's rigidity and overall stability, which traditional welded frames struggle to balance with lightweight design. Furthermore, existing double-layer battery packs suffer from difficult module alignment, low assembly efficiency, and are prone to connection failures or stress concentrations due to misalignment. Under long-term vibration and impact conditions, these structural defects further exacerbate the risks of module loosening, sealing failure, or decreased thermal management performance.

[0024] This application provides a battery pack; please refer to [link / reference]. Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the disassembled structure of the battery pack provided in an embodiment of this application; Figure 2 This is a schematic diagram of the assembly structure of the battery pack provided in an embodiment of this application.

[0025] The battery pack is housed within a battery casing and includes a support structure and battery modules. The support structure includes a first support 11 and a second support 12; the first support 11 is mounted on the bottom plate 31 of the battery casing and has a first accommodating space; the second support 12 is located on the side of the first support 11 away from the bottom plate 31 of the battery casing and has a second accommodating space; a positioning block 115 is provided on the side of the first support 11 facing the second support 12, and an additional beam 126 is provided on the second support 12; the additional beam 126 is connected to the positioning block 115. The battery modules include a first module 21 and a second module 22; the first module 21 is located in the first accommodating space; and the second module 22 is located in the second accommodating space.

[0026] By setting a positioning block 115 on the first bracket 11 and an additional beam 126 connected to it on the second bracket 12, the structural rigidity and integrity between the upper first brackets are effectively enhanced, thereby significantly improving the battery pack's resistance to deformation and safety under vehicle driving vibration and collision impact. This design also enables the second bracket 12 to be quickly and accurately positioned and assembled relative to the first bracket 11, simplifying the production process and improving production efficiency and consistency. In addition, the compact layout of the double-layer stack greatly optimizes the space utilization of the battery box, helps to improve the volumetric energy density of the entire battery system, and the modular layered structure that is easy to disassemble also provides convenience for subsequent maintenance and parts replacement.

[0027] In some embodiments, please refer to Figure 3The positioning block 115 includes a horizontal part and vertical parts disposed on both sides of the horizontal part. The end of the vertical part away from the horizontal part is connected to the first bracket. The additional beam 126 has a slot on the side away from the positioning block 115, and the slot corresponds to the positioning block 115. The positioning block 115 and the additional beam 126 are connected by bolts. The head of the bolt or nut is accommodated in the slot.

[0028] The horizontal part of the positioning block 115 and the two vertical parts on both sides form a stable U-shaped support structure. After connecting with the plate beam, it forms a high-strength force transmission path, which greatly enhances the local stiffness and shear resistance, and can effectively distribute and transfer the upper load to the first support 11. The slot opened on the additional beam 126 provides a precise accommodating space for bolt connection, allowing the bolt head or nut to sink into the slot, avoiding interference that may be caused by the protruding structure, optimizing the spatial layout. At the same time, the slot has an initial positioning function for bolt installation. In conjunction with the positioning block 115, it further simplifies the assembly process and improves the compactness and reliability of the connection structure.

[0029] In some embodiments, please refer to Figure 3 The first support 11 comprises multiple plate beams connected end to end; please refer to... Figure 5 The second support 12 includes multiple side plates and a support plate 125; the multiple side plates are connected end to end around the periphery of the support plate 125 and are located on the side of the support plate 125 away from the first support 11.

[0030] For example, the first support 11 is a rectangular frame, and the plate beams include a first plate beam 111, a second plate beam 112, a third plate beam 113, and a fourth plate beam 114 in sequence. The first accommodating space is defined by the battery box bottom plate 31, the first plate beam 111, the second plate beam 112, the third plate beam 113, and the fourth plate beam 114 to form a rectangular cavity with an open top; the first module 21 is placed in the first accommodating space, and its planar outline is adapted to the inner outline of the rectangular frame.

[0031] The first beam 111, the second beam 112, the third beam 113, and the fourth beam 114 have the same vertical height. The top of the first module 21 is flush with the top of the beam, so that the upper surface of the first module 21 and the top surface of the beam together form a plane. Adhesive is filled between the side wall of the first module 21 and the inner wall of each beam, thereby enhancing the connection stability and integrity between the first module 21 and the first support 11.

[0032] For example, the second support 12 is a rectangular box with an open top, and its side panels include a first side panel 121, a second side panel 122, a third side panel 123, and a fourth side panel 124 in sequence. The second module is placed in the second receiving space, and its planar outline is adapted to the inner outline of the rectangular box. The first side panel 121, the second side panel 122, the third side panel 123, and the fourth side panel 124 have the same vertical height; the top of the second module 22 is flush with the top of the beam, so that the upper surface of the first module 21 and the top surface of the beam together form a plane. Adhesive is filled between the side wall of the second module 22 and the inner wall of each side panel, thereby enhancing the connection stability and integrity between the second module 22 and the second support 12.

[0033] In some embodiments, the first plate beam 111 and the third plate beam 113 are the two long side beams of the first support 11; the first side plate 121 and the third side plate 123 are the two long side plates of the second support 12; the positioning blocks 115 are spaced apart on the first plate beam 111 and the third plate beam 113; the additional beam 126 is disposed on the first side plate 121 and the third side plate 123, and the axial direction of the additional beam 126 is the same as the length direction of the second support 12.

[0034] In this embodiment, by concentrating the positioning block 115 and the additional beam 126 on the two long sides of the first bracket 11 and the second bracket 12, the ample linear space provided in the long side direction is fully utilized, allowing multiple connection nodes to be arranged at intervals, resulting in a higher number of connection points and a larger connection span, thereby significantly enhancing the bonding strength and overall stability between the upper first brackets. At the same time, this layout allows the assembly process to focus only on the docking and fixing in the long side direction, simplifying the installation process, improving assembly efficiency, and helping to ensure uniform force distribution.

[0035] For example, the positioning block 115 is made of the first plate beam 111 and the third plate beam 113 by an integral molding process; similarly, the additional beam 126 is made of the first side plate 121 and the third side plate 123 by an integral molding process.

[0036] For example, the positioning blocks 115 on the first plate beam 111 and the third plate beam 113 are symmetrically distributed, and the number of positioning blocks 115 on each side can be set to 3 to 8 according to actual needs.

[0037] For example, the additional beam 126 is arranged along the length of the second support 12, providing a continuous and sufficient arrangement space for its connection with the positioning block 115, thereby enabling more connection points to be set, and thus improving the connection stability and overall structural strength between the upper first supports.

[0038] In some other embodiments, each plate beam is provided with a positioning block 115; each side plate is provided with an additional beam 126.

[0039] In some embodiments, please refer to Figure 3 , Figure 4 The first plate beam 111 and the third plate beam 113 are respectively provided with connecting parts 116 at both ends. The connecting parts 116 are connected to the side wall of the battery box and extend out of the second plate beam 112 and the fourth plate beam 114. This design integrates the battery pack structure with the battery box, enhancing the structural integration and overall rigidity, and improving the system's reliability against vibration and impact during vehicle operation. At the same time, this connection method provides clear installation positioning points for the battery pack, simplifies the assembly process, and helps ensure production consistency and efficiency.

[0040] For example, please refer to Figure 3 , Figure 4 The battery box has a mounting beam 32 on its side wall. A connecting groove is formed on the side of the mounting beam 32 facing the battery pack, extending axially along the mounting beam 32. A protrusion is provided at the end of the connecting part 116, which is accommodated within the connecting groove and welded to the mounting beam 32. The axially extending connecting groove on the mounting beam 32 cooperates with the protrusion at the end of the connecting part 116, achieving rapid initial positioning and guidance of the battery pack within the vehicle's battery box, significantly simplifying the assembly process and improving installation efficiency and accuracy. The design of the protrusion being accommodated within the connecting groove constitutes a stable mechanical interlock structure, effectively limiting the displacement of the battery pack in all directions and enhancing the system's reliability against vibration and shock. Furthermore, the cooperation between the protrusion and the connecting groove significantly increases the contact and welding area between them, thereby greatly improving the connection strength and structural durability of the welded joint.

[0041] In some embodiments, the plate beam includes a box-section beam made of aluminum alloy; the additional beam 126 is an aluminum alloy square tube with a rectangular cross-section; the structural and material design of the two can significantly reduce the overall weight while ensuring excellent structural stiffness and bending and torsional strength, thus realizing the lightweight design of the system.

[0042] The side panel includes an outer panel, an inner panel, and reinforcing ribs connecting the two, which further contributes to high in-plane stiffness and stability with a lower weight.

[0043] Please see Figure 6 The support plate 125 includes an aluminum alloy liquid cooling plate; the battery box base plate 31 has the same structure as the support plate 125; the support plate 125 and the battery box base plate 31 have both load-bearing and thermal management functions, realizing functional integration and avoiding the weight burden of additional reinforcement structures.

[0044] Secondly, this application provides a vehicle including the battery pack provided in the first aspect of this application.

[0045] It is understandable that, since the vehicle of this application uses the aforementioned battery pack, it must possess all the beneficial effects achieved by the battery pack, which will not be elaborated here.

[0046] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0047] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0048] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A battery pack, characterized in that, The battery pack includes: The support structure includes a first support (11) and a second support (12); the first support (11) is disposed on the bottom plate (31) of the battery box and has a first accommodating space; the second support (12) is disposed on the side of the first support (11) away from the bottom plate (31) of the battery box and has a second accommodating space; the first support (11) has a positioning block (115) on the side facing the second support (12), and the second support (12) has an additional beam (126); the additional beam (126) is connected to the positioning block (115); The battery module includes a first module (21) and a second module (22); the first module (21) is disposed in the first accommodating space; and the second module (22) is disposed in the second accommodating space.

2. The battery pack according to claim 1, characterized in that, The positioning block (115) includes a horizontal part and vertical parts disposed on both sides of the horizontal part, and the end of the vertical part away from the horizontal part is connected to the first bracket (11). The additional beam (126) has a slot on the side away from the positioning block (115), and the slot corresponds to the positioning block (115); The positioning block (115) is connected to the additional beam (126) by bolts; the head of the bolt or the nut is accommodated in the slot.

3. The battery pack according to claim 1, characterized in that, The first support (11) includes multiple plate beams connected end to end; The second support (12) includes multiple side plates and a support plate (125); the multiple side plates are connected end to end around the periphery of the support plate (125) and are located on the side of the support plate (125) away from the first support (11).

4. The battery pack according to claim 3, characterized in that, The first support (11) is a rectangular frame, and the plate beams include a first plate beam (111), a second plate beam (112), a third plate beam (113) and a fourth plate beam (114) in sequence. The second bracket (12) is a rectangular box with an open top, and the side plates include a first side plate (121), a second side plate (122), a third side plate (123), and a fourth side plate (124) in sequence.

5. The battery pack according to claim 4, characterized in that, The first plate beam (111) and the third plate beam (113) are the two long side beams of the first support (11); the first side plate (121) and the third side plate (123) are the two long side plates of the second support (12); The positioning blocks (115) are spaced apart on the first plate beam (111) and the third plate beam (113); The additional beam (126) is disposed on the first side plate (121) and the third side plate (123), and the axial direction of the additional beam (126) is the same as the length direction of the second bracket (12).

6. The battery pack according to claim 4, characterized in that, The first plate beam (111) and the third plate beam (113) are respectively provided with connecting parts (116) at both ends, and the connecting parts (116) are connected to the side wall of the battery box.

7. The battery pack according to claim 6, characterized in that, The battery box is provided with a mounting beam (32) on its side wall. The mounting beam (32) has a connecting groove on the side facing the battery pack. The connecting groove extends along the axial direction of the mounting beam (32). The end of the connecting part (116) is provided with a protrusion, which is accommodated in the connecting groove and welded to the mounting beam (32).

8. The battery pack according to claim 1, characterized in that, The additional beam (126) is an aluminum alloy square tube with a rectangular cross-section.

9. The battery pack according to claim 3, characterized in that, The plate beam includes a box-section beam made of aluminum alloy; the side plate includes an outer panel, an inner panel and a reinforcing rib connecting the two; the bearing plate (125) includes an aluminum alloy liquid cooling plate; the battery box bottom plate (31) has the same structure as the bearing plate (125).

10. A vehicle, characterized in that, Includes the battery pack as described in any one of claims 1 to 9.

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