Battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack. The battery pack comprises a box body, an upper cover body and a plurality of stiffening beams, the box body comprises a bottom plate and four frames arranged in the circumferential direction of the bottom plate, the upper cover body is provided with a first face and a second face, and the first face is connected with the frames; the multiple structural beams are arranged on the second face and distributed at intervals in the length direction of the upper cover body, the two ends of each structural beam extend to the edges of the two sides of the upper cover body in the width direction, and at least part of the projection of the structural beams on the bottom plate is located on the frame. The battery pack disclosed by the utility model is higher in structural strength and higher in safety; and the structural strengths of different positions of the upper cover body in the length direction are more consistent.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery pack. Background Technology

[0002] In recent years, CTC (Cell to Chassis) technology has directly fixed the battery cells to the vehicle chassis, maximizing space utilization, significantly improving the vehicle's energy density and range, while reducing overall weight and enhancing the vehicle's power performance and energy efficiency.

[0003] While CTC technology has made significant progress in improving vehicle performance, certain problems still exist. For example, because the top cover in CTC technology is made of sheet metal, the structural strength is weakened, resulting in a significant reduction in safety during traffic collisions and failing to meet usage requirements, thus greatly reducing the safety of the battery pack.

[0004] Therefore, there is an urgent need for a battery pack to solve the above problems. Utility Model Content

[0005] Based on the above, the purpose of this utility model is to provide a battery pack with higher structural strength and higher safety.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Battery pack, including:

[0008] The box body and the top cover body are provided. The box body includes a bottom plate and four side frames disposed around the bottom plate. The top cover body is provided with a first surface and a second surface, and the first surface is connected to the side frames.

[0009] Multiple structural beams are disposed on the second surface. The multiple structural beams are distributed at intervals along the length direction of the upper cover body. The two ends of the structural beams extend to the edges of both sides of the upper cover body in the width direction, and the projection of the structural beams on the bottom plate is at least partially located on the frame.

[0010] The beneficial effects of this utility model are as follows:

[0011] This invention connects the first surface of the top cover to the frame of the housing to enclose the housing, facilitating the placement of battery packs or other structures within the housing and improving the safety of the battery packs housed within the housing. Simultaneously, a structural beam is provided on the second surface of the top cover, with both ends extending to the edges of the top cover in the width direction. The projection of the structural beam onto the bottom plate is at least partially located on the frame. This arrangement allows the force to be transferred to the frame when the structural beam is under stress, reducing the concentrated stress on the top cover and thus improving its structural strength. Especially when the top cover is impacted from the side, the structural beam effectively reduces the risk of damage to the battery packs within the housing, resulting in higher safety. Furthermore, multiple structural beams are provided, spaced apart along the length of the top cover, which helps to improve the structural strength of the top cover at different locations along the length direction, making the structural strength more consistent across different locations. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model 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 the content of the embodiments of this utility model and these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of a battery pack provided in a specific embodiment of this utility model;

[0014] Figure 2 This is a partial schematic diagram of the battery pack provided in a specific embodiment of this utility model.

[0015] In the picture:

[0016] 100. Top cover body; 101. First region; 102. Second region; 110. Reinforcing plate; 111. Connecting part; 120. Connecting plate; 140. Reinforcing support plate; 150. Operating through hole;

[0017] 200, Structural beam; 210, Functional beam group; 211, Functional beam; 2111, Pad plate; 220, Reinforcing beam. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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 utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0020] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1 and Figure 2As shown, this embodiment provides a battery pack, including a housing, a top cover body 100, and a plurality of structural beams 200. The housing includes a bottom plate and four side frames disposed around the bottom plate. The top cover body 100 has a first surface and a second surface, with the first surface connected to the side frames. The plurality of structural beams 200 are all disposed on the second surface, and the plurality of structural beams 200 are spaced apart along the length direction of the top cover body 100. The two ends of each structural beam 200 extend to the edges of both sides of the top cover body 100 in the width direction, and the projection of each structural beam 200 onto the bottom plate is at least partially located on the side frames. The first surface and the second surface are two opposite planes of the top cover body 100, wherein the first surface is the bottom surface of the top cover body 100, and the second surface is the top surface of the top cover body 100.

[0024] By connecting the first surface of the top cover body 100 to the frame of the enclosure, the enclosure is sealed, facilitating the placement of battery packs or other structures within the enclosure and improving the safety of the battery packs housed within the enclosure. Simultaneously, a structural beam 200 is provided on the second surface of the top cover body 100. The two ends of the structural beam 200 extend to the edges of the top cover body 100 in the width direction, and at least part of the projection of the structural beam 200 onto the bottom plate lies within the frame; that is, in the plane of the bottom plate, at least part of the projection of the structural beam 200 coincides with the projection of the bottom plate. This arrangement allows the force to be transferred to the frame when the structural beam 200 is under stress, reducing the concentrated stress on the top cover body 100 and thus improving the structural strength of the top cover body 100. Especially when the top cover body 100 is impacted from the side, the structural beam 200 effectively reduces the risk of damage to the battery packs within the enclosure, resulting in higher safety. In addition, multiple structural beams 200 are provided, and the multiple structural beams 200 are distributed at intervals along the length direction of the upper cover body 100. This is beneficial to improve the structural strength of the upper cover body 100 at different positions along the length direction, and makes the structural strength of the upper cover body 100 at different positions along the length direction more consistent.

[0025] Specifically, the structural beam 200 includes functional beam groups 210 and reinforcing beams 220, which are spaced apart along the length of the upper cover body 100. The reinforcing beams 220 are used to strengthen the structural strength of the upper cover body 100. The functional beam groups 210, while increasing structural strength, can also have other functions, such as accommodating other functional modules. Those skilled in the art can configure them according to actual needs. It is worth noting that the projections of the two ends of the reinforcing beams 220 onto the bottom plate are located at the edge, allowing the force on the reinforcing beams 220 to be transferred to the edge.

[0026] Furthermore, two reinforcing beams 220 are provided, one on each side of the functional beam group 210, and the other near the ends of the upper cover body 100 along its length. This is to increase the structural strength of the end region of the upper cover body 100 along its length. The functional beam group 210 is concentrated in the middle, which also facilitates the arrangement of other functional modules.

[0027] The functional beam assembly 210 includes multiple functional beams 211 arranged along the length of the upper cover body 100. The specific number and position of the functional beams 211 can be set according to the position and quantity of the functional modules to be installed. In this embodiment, the functional beam assembly 210 includes three functional beams 211, which are spaced apart along the length of the upper cover body 100. For example, the functional module can be a seat, that is, the functional beams 211 can be used to support and install seats. The projections of the two ends of the functional beams 211 on the bottom plate are located on the edge. This arrangement can not only transfer the impact force of the functional beams 211 when they are hit to the edge, but also transfer the weight of the functional modules installed on the functional beams 211 to the edge, which is beneficial to evenly distribute the force on the functional beams 211 and the edge, making the load-bearing capacity of the functional modules more stable and reliable.

[0028] Optionally, the cross-section of the reinforcing beam 220 is set in a Z-shape, which increases the strength of the upper cover body 100 and facilitates connection with the upper cover body 100. The connection method uses bolts, which facilitates installation and disassembly and provides higher connection strength. For example, the reinforcing beam 220 is formed by bending sheet metal. Furthermore, the width of the Z-shape in the cross-section can be set according to actual needs and is not specifically limited here.

[0029] Preferably, the cross-section of the functional beam 211 is configured with at least two interconnected V-shaped protrusions. Since the structural strength of the upper cover body 100 weakens towards the center along its length, the cross-section of the functional beam 211 differs from that of the reinforcing beam 220. By configuring the cross-section of the functional beam 211 with at least two interconnected V-shaped protrusions, the reinforcing effect of the functional beam 211 on the central region of the upper cover body 100 can be effectively improved, while simultaneously enhancing the reliability of the load-bearing capacity of the functional modules. In this embodiment, the cross-section of the functional beam 211 has two V-shaped protrusions. In other embodiments, to further increase structural strength for bearing heavier functional modules, the cross-section of the functional beam 211 can be configured with three or four V-shaped protrusions; no specific limitation is made here.

[0030] It is worth noting that, since the cross-section of the functional beams 211 is arranged in a U-shape with interconnected sections, the space inside the U-shape can be used to avoid connecting structures when other functional modules are installed on the functional beams 211. This prevents the connecting structures from extending into the housing cavity and occupying space in the battery pack, while also ensuring the sealing and structural strength of the housing cavity. Preferably, a pad 2111 is provided on the inner side of the functional beams 211. The pad 2111 is also U-shaped and acts as a gasket when connecting other functional modules to the functional beams 211, increasing strength and improving the reliability of the connection.

[0031] To further increase the strength of the upper cover body 100 and the structural beam 200, a reinforcing plate 110 is connected between the ends of adjacent functional beams 211. Fasteners can be used to securely connect the structural beam 200, the upper cover body 100, and the reinforcing plate 110, ensuring convenient and reliable connection. The reinforcing plate 110 extends along the length of the upper cover body 100. To accommodate the cross-sectional shape of the functional beam 211, connecting portions 111 are provided at both ends of the reinforcing plate 110. These connecting portions 111 are pressed against the U-shaped flanges of the functional beam 211, resulting in better reinforcement and a more reliable connection.

[0032] Optionally, a connecting plate 120 is provided between adjacent functional beams 211, and the connecting plate 120 is connected to the second surface. For example, the connecting plate 120 can be set at the position where other functional modules are installed on the functional beam 211 to improve the structural strength of the cover body 100 at that position; or it can be set at the position where the cover body 100 is likely to be stepped on to specifically improve the structural strength of the cover body 100.

[0033] In this embodiment, the upper cover body 100 also includes a reinforcing support plate 140, which is disposed at the connection position of adjacent two sides of the upper cover body 100. It can be understood that the connection position of adjacent two sides of the upper cover body 100 is the corner position of the upper cover body 100. Since stress concentration is prone to occur at the corner position, the provision of the reinforcing support plate 140 is beneficial to improving the structural strength at the corner of the upper cover body 100, thereby improving the consistency of the overall structural strength of the upper cover body 100.

[0034] For example, the reinforcing support plate 140 extends in an L-shape, with one side extending along the long side of the upper cover body 100 and the other side extending along the short side of the upper cover body 100. Preferably, the length of the side of the L-shaped reinforcing support plate 140 extending along the long side of the upper cover body 100 can be set to be greater than the length of the side extending along the short side of the upper cover body 100, in which case the reinforcing effect of the reinforcing support plate 140 is better.

[0035] Furthermore, the base plate and four side frames form a receiving cavity, within which multiple battery packs are arranged. The battery pack also includes a heat exchange plate, which regulates the temperature of the battery packs within the receiving cavity, ensuring they operate at a suitable temperature. The upper surface of the heat exchange plate is fixedly connected to the first surface, and the lower surface is fixedly connected to the upper surfaces of the multiple battery packs. By fixing the heat exchange plate to both sides, not only is the structural strength of the upper cover body 100 increased, but the overall strength of the battery pack is also improved. Optionally, the heat exchange plate can be a liquid-cooled plate.

[0036] It is worth noting that the upper cover body 100 includes a first region 101 and a second region 102. A structural beam 200 is disposed in the first region 101, and the hardness of the first region 101 is less than that of the second region 102. Since the structural beam 200 strengthens the first region 101, the second region 102, which does not have a structural beam 200, has a higher hardness to ensure the overall strength consistency of the upper cover body 100. Similarly, the thickness of the first region 101 can be set to be less than that of the second region 102, which can also achieve better overall strength consistency of the upper cover body 100.

[0037] Optionally, one end of the top cover body 100 extends away from the other, forming a second region 102. An electrical compartment is located in the second region 102, and the top cover body 100 of the second region 102 is provided with an operation through-hole 150. The operation through-hole 150 communicates with the electrical compartment and the receiving cavity, facilitating diagnosis or repair of the battery pack and other structures within the receiving cavity by operators, thus improving the convenience of diagnosis and repair. Furthermore, the electrical compartment also helps to improve the structural strength of the top cover body 100.

[0038] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery pack, characterized in that, include: The box body and the top cover body (100) include a bottom plate and four side frames disposed around the bottom plate. The top cover body (100) is provided with a first surface and a second surface, and the first surface is connected to the side frames. Multiple structural beams (200) are disposed on the second surface. The multiple structural beams (200) are distributed at intervals along the length direction of the upper cover body (100). The two ends of the structural beams (200) extend to the edges of the upper cover body (100) on both sides in the width direction, and the projection of the structural beams (200) on the bottom plate is at least partially located on the frame.

2. The battery pack according to claim 1, characterized in that, The structural beam (200) includes a functional beam group (210) and a reinforcing beam (220). The functional beam group (210) and the reinforcing beam (220) are distributed at intervals along the length direction of the upper cover body (100). The projections of the two ends of the reinforcing beam (220) on the bottom plate are located on the frame.

3. The battery pack according to claim 2, characterized in that, There are two reinforcing beams (220), which are respectively located on both sides of the functional beam group (210), and the two reinforcing beams (220) are respectively located near the ends of the upper cover body (100) in the length direction.

4. The battery pack according to claim 2, characterized in that, The cross-section of the reinforcing beam (220) is set in a Z-shape.

5. The battery pack according to claim 2, characterized in that, The functional beam group (210) includes three functional beams (211), which are spaced apart along the length of the upper cover body (100). The projections of the two ends of the functional beams (211) on the bottom plate are located on the edge.

6. The battery pack according to claim 5, characterized in that, The cross-section of the functional beam (211) is configured as at least two interconnected Z-shaped sections.

7. The battery pack according to claim 5, characterized in that, A reinforcing plate (110) is connected between the ends of adjacent functional beams (211); and / or, a connecting plate (120) is provided between adjacent functional beams (211), the connecting plate (120) being connected to the second surface.

8. The battery pack according to any one of claims 1-7, characterized in that, The upper cover body (100) includes a first region (101) and a second region (102). The first region (101) is provided with the structural beam (200), and the thickness and / or hardness of the first region (101) is less than that of the second region (102).

9. The battery pack according to any one of claims 1-7, characterized in that, The base plate and the four frame edges form a receiving cavity, in which multiple battery packs are arranged. Each battery pack is also provided with a heat exchange plate. The upper surface of the heat exchange plate is fixedly connected to the first surface, and the lower surface is fixedly connected to the upper surface of the multiple battery packs.

10. The battery pack according to any one of claims 1-7, characterized in that, The upper cover body (100) also includes a reinforcing support plate (140), which is disposed at the connection position of adjacent two sides of the upper cover body (100).

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