A top protection structure, a battery pack, and a tram

Abstract

This utility model proposes a top protection structure, a battery pack, and an electric vehicle, belonging to the field of battery pack technology. It includes an end plate and a bracket. The bracket is mounted on the surface of the end plate and includes interconnected horizontal and vertical plates. The vertical plate is connected to the surface of the end plate, and the horizontal plate is located above the upper surface of the end plate, with a gap between the horizontal plate and the upper surface of the end plate. The top protection structure of this utility model includes a bracket mounted on the surface of the end plate. The bracket includes interconnected horizontal and vertical plates, with the vertical plate connected to the surface of the end plate and the horizontal plate located above the upper surface of the end plate. The horizontal plate of the bracket fully utilizes the buffer gap between the battery cell and the cover to support the cover, improving the rigidity and impact resistance of the battery pack cover.

Description

Technical Field

[0001] This utility model belongs to the field of battery pack technology, and specifically relates to a top protection structure, a battery pack, and an electric vehicle. Background Technology

[0002] It is difficult to install support brackets between the crossbeams of the battery pack and the cover, and the cover has a large span, which cannot effectively protect the cells from external pressure and deformation. Therefore, during the assembly, transportation and integration of the existing battery pack into the vehicle chassis, there are situations where the top of the cover is stepped on or foreign objects fall onto the cover, causing the cover to deform and thus affecting the cells (such as cell damage and cell fire).

[0003] The existing mature solution is to install cushioning foam between the box cover and the battery cell. However, the cushioning foam can only buffer relatively minor collisions or the impact of small objects falling, and cannot effectively protect the battery cell.

[0004] Therefore, a top protective structure that can be installed between the cover and the battery cell is needed to support the cover and protect the battery cell. Utility Model Content

[0005] To address the aforementioned problems, this utility model proposes a top protection structure, comprising an end plate and a bracket. The bracket is mounted on the surface of the end plate, and the bracket includes a horizontal plate and a vertical plate connected to each other. The vertical plate is connected to the surface of the end plate, and the horizontal plate is located above the upper surface of the end plate, with a gap between the horizontal plate and the upper surface of the end plate.

[0006] Furthermore, a buckle is provided on the surface of the end plate, and the buckle engages with the first buckle hole on the vertical plate.

[0007] Furthermore, a wave plate is provided on the surface of the end plate, and the wave plate is located between the two sets of buckles.

[0008] Furthermore, the top protective structure also includes a connecting piece, the two ends of which are mounted on the upper surfaces of two adjacent and opposite supports.

[0009] Furthermore, the connecting piece includes a first connecting piece, the two ends of which are mounted on the upper surfaces of two brackets located at the edges, and the two brackets are installed adjacent to each other and opposite to each other.

[0010] Furthermore, the connecting piece includes a second connecting piece, one end of which is mounted on the upper surface of two adjacent brackets on the same side of a set, and the other end is mounted on the upper surface of two adjacent brackets on the same side of another set, and the second connecting piece is located between two first connecting pieces.

[0011] A battery pack includes a housing, battery cells, and the aforementioned top protection structure, wherein the battery cells and the top protection structure are both installed in the housing, and the top protection structure is installed at both ends and on the upper surface of the battery cells.

[0012] Furthermore, the enclosure includes a bottom plate and a frame, the frame is mounted on the upper surface of the bottom plate, and the battery cell and the top protective structure are installed in the space formed by the bottom plate and the frame.

[0013] Furthermore, a box body crossbeam is provided on the upper surface of the box body bottom plate, and the box body crossbeam is located in the middle of the box body frame; the battery cell and the top protection structure are installed in the space enclosed by two adjacent box body crossbeams, the box body frame and the box body bottom plate, and / or the battery cell and the top protection structure are installed in the space enclosed by the box body crossbeams, the box body frame and the box body bottom plate.

[0014] An electric vehicle includes a body and the aforementioned battery pack, the battery pack being installed in the body.

[0015] 1. The top protection structure of this utility model includes a bracket, which is installed on the surface of the end plate. The bracket includes a horizontal plate and a vertical plate that are connected to each other. The vertical plate is connected to the surface of the end plate, and the horizontal plate is located above the upper surface of the end plate. The horizontal plate of the bracket makes full use of the buffer gap between the battery cell and the box cover to support the box cover, thereby improving the rigidity and impact resistance of the battery pack box cover.

[0016] 2. The top protection structure of this utility model has a buckle on the surface of the end plate, which engages with the first buckle hole on the vertical plate of the bracket, thereby facilitating the installation of the bracket at any time (before the end plate and the battery cell are installed into the box or after the end plate and the battery cell are installed into the box), thus improving the practicality of this utility model.

[0017] 3. The top protection structure of this utility model includes a connecting piece, the two ends of which are installed on the upper surfaces of two adjacent and opposite brackets. The installation of the connecting piece completely protects the upper surface of the battery cell, thereby improving the protection effect of the battery cell.

[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the top protective structure in an embodiment of this utility model is shown.

[0021] Figure 2 A schematic diagram of several top protective structures in an embodiment of this utility model is shown.

[0022] Figure 3 A schematic diagram of the end plate of the top protective structure in an embodiment of this utility model is shown.

[0023] Figure 4 A schematic diagram of the battery pack structure in an embodiment of this utility model is shown.

[0024] In the diagram, 10 is the end plate; 11 is the corrugated plate; 12 is the buckle; 20 is the bracket; 21 is the first snap hole; 22 is the second snap hole; 30 is the connecting piece; 31 is the first connecting piece; 32 is the second connecting piece; 40 is the battery cell; 50 is the housing; 51 is the bottom plate of the housing; 52 is the frame of the housing; and 53 is the crossbeam of the housing. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] Example 1,

[0027] refer to Figure 1 , Figure 1A schematic diagram of the top protection structure in an embodiment of this utility model is shown. A top protection structure includes an end plate 10 and a bracket 20. The bracket 20 is mounted on the surface of the end plate 10 and includes a horizontal plate and a vertical plate connected to each other. The vertical plate is connected to the surface of the end plate 10, and the horizontal plate is located above the upper surface of the end plate 10, with a gap between the horizontal plate and the upper surface of the end plate 10. Specifically, the bracket 20 is an L-shaped plate. The bracket 20 is mounted on the outer surface of the end plate 10 to wrap around the outer and upper surfaces of the end plate 10, protecting the end plate 10 and the battery cell 40 mounted inside the end plate 10. Since each battery cell 40 has an end plate 10 on both end faces and a bracket 20 on each end plate 10, the horizontal plate of the bracket 20 fully utilizes the buffer gap between the battery cell 40 and the cover to support the cover, reducing cover deformation and protecting the battery cell 40 from compression.

[0028] In the above embodiments, another optional implementation is that the bracket 20 is a T-shaped plate. The bracket 20 is installed on the outer surface of the end plate 10 to wrap the outer and upper surfaces of the end plate 10, protecting the end plate 10 and the battery cell 40 installed inside the end plate 10. Since the end plate 10 is provided on both ends of each battery cell 40, and the bracket 20 is provided on each end plate 10, the bracket 20 is an inverted "T" shaped plate, that is, the horizontal plate is located on the upper surface of the end plate 10 and the battery cell 40, so a more comprehensive protection of the battery cell 40 can be achieved. The bracket 20 is an inverted "T" shaped plate, the horizontal plate has a larger area, the force is more stable, and the vertical plate is located in the middle of the horizontal plate, so the support is more stable and the bracket 20 is more robust.

[0029] refer to Figure 3 A buckle 12 is provided on the surface of the end plate 10, and the buckle 12 engages with the first locking hole 21 on the vertical plate. Specifically, grooves are provided on the outer surface of the end plate 10 near the left and right sides, and the buckle 12 is provided in the grooves. The first locking hole 21 is provided on the vertical plate of the second locking hole 22. The first locking hole 21 is a larger circular groove connected to a smaller circular groove, and the two grooves are connected. At the same time, the buckle 12 is a nail with a larger circular area at the end away from the end plate 10. In use, the larger circular hole of the first locking hole 21 of the bracket 20 needs to be put on the buckle 12, and the buckle 12 needs to pass through the first locking hole 21. Then, the bracket 20 is slid down so that the smaller circular hole of the first locking hole 21 is locked on the buckle 12 to complete the fixation (e.g., Figure 2 As shown), a second locking hole 22 is provided on the horizontal plate of the bracket 20. The second locking hole 22 is connected to the protruding post on the connecting piece 30, or the horizontal plate of the bracket 20 is welded to the connecting piece 30.

[0030] In the above embodiment, another optional implementation is as follows: Grooves are provided on the outer surface of the end plate 10 near the left and right sides. Two vertically or horizontally arranged buckles 12 are provided in each groove. Two first buckles 21 are provided on the vertical plate of the second buckle hole 22, corresponding to the two buckles 12. Each first buckle hole 21 is a larger circular groove connected to a smaller circular groove, and the two grooves are connected. Simultaneously, the buckle 12 is a nail with a larger circular area at the end away from the end plate 10. In use, the larger circular holes of the two first buckles 21 of the bracket 20 are fitted onto the two buckles 12, and the buckles 12 pass through the first buckles 21. Then, the bracket 20 is slid downwards, causing the smaller circular holes of the two first buckles 21 to engage with the two buckles 12 to complete the fixation (e.g., ...). Figure 2 As shown), two second locking holes 22 are provided on the horizontal plate of the bracket 20. The second locking holes 22 are connected to the protruding post on the connecting piece 30, or the horizontal plate of the bracket 20 is welded to the connecting piece 30.

[0031] refer to Figure 2 The top protective structure also includes a connecting piece 30, with both ends of the connecting piece 30 mounted on the upper surfaces of two adjacent and opposite brackets 20. Specifically, end plates 10 are mounted at both opposite ends of each battery cell 40, and several battery cells 40 are arranged in a row. Connecting pieces 30 are mounted on the brackets 20 of the end plates 10 at both ends of the same row of battery cells 40.

[0032] Furthermore, the connecting piece 30 includes a first connecting piece 31, the two ends of which are mounted on the upper surfaces of two brackets 20 located at the edges, the two brackets 20 being adjacent and opposite to each other. Specifically, the first connecting piece 31 is mounted on the upper surfaces of two opposing brackets 20 at the edges of the same row of cells 40.

[0033] Furthermore, the connecting piece 30 includes a second connecting piece 32, the two ends of which are respectively mounted on the upper surfaces of two adjacent brackets 20 on the same side of two sets, and the second connecting piece 32 is located between two first connecting pieces 31. Specifically, the two ends of the first connecting piece 31 are mounted on the upper surfaces of two sets of brackets 20, each set of brackets 20 includes two adjacent brackets 20, and the two brackets 20 are located on the same end face of the same row of cells 40.

[0034] Example 2,

[0035] refer to Figure 4 , Figure 4A schematic diagram of the battery pack structure in an embodiment of the present invention is shown. A battery pack includes a housing 50, battery cells 40, and a top protective structure as described in Embodiment 1. Both the battery cells 40 and the top protective structure are installed within the housing 50. The top protective structure is installed at both ends and on the upper surface of the battery cells 40. Specifically, by installing the battery cells 40 within the housing 50 and installing the top protective structures on the upper surface and end faces of the battery cells 40, the protective effect of the battery cells 40 is improved.

[0036] This utility model makes full use of the buffer gap between the battery cell 40 and the box cover, and embeds a bracket 20 on the end plate 10 to support the box cover, reduce the deformation of the box cover, and protect the battery cell 40 from being squeezed.

[0037] Specifically, the enclosure 50 includes a bottom plate 51 and a frame 52. The frame 52 is mounted on the upper surface of the bottom plate 51. The space formed by the bottom plate 51 and the frame 52 houses the battery cell 40 and the top protective structure. The housing formed by the bottom plate 51 and the frame 52 is used to house the battery cell 40.

[0038] In the above embodiments, another optional implementation is that the housing 50 includes a housing base plate 51, a housing frame 52, and a cover plate. The housing frame 52 is installed on the upper surface of the housing base plate 51. The housing base plate 51, housing frame 52, and cover plate form a space in which the battery cell 40 and the top protective structure are installed. The housing formed by the housing base plate 51, housing frame 52, and cover plate is used to protect the battery cell 40.

[0039] In this embodiment of the utility model, a box body crossbeam 53 is provided on the upper surface of the box body bottom plate 51, and the box body crossbeam 53 is located in the middle of the box body frame 52; the battery cell 40 and the top protective structure are installed in the space enclosed by two adjacent box body crossbeams 53, box body frame 52 and box body bottom plate 51, and / or the battery cell 40 and the top protective structure are installed in the space enclosed by the box body crossbeam 53, box body frame 52 and box body bottom plate 51.

[0040] Specifically, by dividing the box frame 52 into several spaces by the box beam 53, the space is used to install the battery cell 40 and the top protective structure, so that the battery cell 40 can be installed in a regular manner and the battery cell 40 can be installed more neatly.

[0041] In the above embodiment, another optional implementation is that three box beams 53 are provided on the upper surface of the box bottom plate 51, dividing the box frame 52 into four spaces; the battery cell 40 and the top protective structure are installed in the space enclosed by two adjacent box beams 53, the box frame 52, and the box bottom plate 51, and some components are installed in the space enclosed by the box beams 53, the box frame 52, and the box bottom plate 51. Specifically, the box frame 52 is divided into several spaces by the box beams 53, and the spaces are used to install the battery cell 40 and the top protective structure, thus allowing the battery cell 40 to be installed in a regular manner.

[0042] In a specific embodiment, a corrugated plate 11 is provided on the surface of the end plate 10. The corrugated plate 11 is located between two sets of buckles 12, and the corrugated plate 11 is in contact with the end face of the battery cell 40.

[0043] Specifically, the corrugated plate 11 is a corrugated plate. The corrugated plate 11 of the end plate 10 and the battery cell 40 are fitted together and installed in the housing 50. The corrugated plate 11 can be interference-fitted with the battery cell 40 to fix the battery cell 40 in the housing 50. When the battery cell 40 expands, the corrugated plate 11 can be squeezed to provide space for the battery cell 40 to expand, thus preventing damage to the housing 50 after the battery cell 40 expands due to insufficient space.

[0044] Assembly process of this utility model:

[0045] This invention allows for selection of whether to install the battery cell 40 first or last, depending on the situation in which the battery cell 40 is installed in the housing 50, thereby improving assembly efficiency.

[0046] First installation (i.e., before the battery cell 40 is assembled into the housing 50): Insert the first locking hole 21 of the bracket 20 into the buckle 12 of the end plate 10, and then install the end plate 10, bracket 20 and battery cell 40 together into the housing 50, so that the outer surface of the end plate 10 contacts the housing frame 52, or the outer surface of the end plate 10 contacts the housing crossbeam 53.

[0047] Then, install the first connecting piece 31 on the bracket 20 near the frame 52 of the box, and install the second connecting piece 32 on the middle bracket 20; after installing the bracket 20, install the box cover.

[0048] Post-installation (i.e., when the battery cell 40 has been installed in the housing 50): Install the first clip 21 of the bracket 20 onto the clip 12 of the end plate 10.

[0049] Install the brackets 20 on the upper surfaces of adjacent and opposite brackets 20. Install the first connecting piece 31 on the bracket 20 near the frame 52 of the box. Install the second connecting piece 32 on the middle bracket 20. After installing the brackets 20, install the box cover.

[0050] Example 3,

[0051] An electric vehicle includes a body and a battery pack of embodiment 2, the battery pack being installed in the body.

[0052] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A top protective structure, characterized in that, It includes an end plate (10) and a bracket (20), the bracket (20) being mounted on the surface of the end plate (10), the bracket (20) including a horizontal plate and a vertical plate connected to each other, the vertical plate being connected to the surface of the end plate (10), the horizontal plate being located above the upper surface of the end plate (10), and there is a gap between the horizontal plate and the upper surface of the end plate (10).

2. The top protection structure according to claim 1, characterized in that, The end plate (10) is provided with a buckle (12) on its surface, and the buckle (12) engages with the first buckle hole (21) on the vertical plate.

3. The top protective structure according to claim 2, characterized in that, A wave plate (11) is provided on the surface of the end plate (10), and the wave plate (11) is located between two sets of buckles (12).

4. A top protection structure according to any one of claims 1-3, characterized in that, The top protective structure also includes a connecting piece (30), the two ends of which are mounted on the upper surfaces of two adjacent and opposite supports (20).

5. A top protection structure according to claim 4, characterized in that, The connecting piece (30) includes a first connecting piece (31), the two ends of which are mounted on the upper surfaces of two brackets (20) located at the edges, and the two brackets (20) are installed adjacent to each other and opposite to each other.

6. A top protection structure according to claim 5, characterized in that, The connecting piece (30) includes a second connecting piece (32), one end of which is mounted on the upper surface of two adjacent brackets (20) on the same side, and the other end is mounted on the upper surface of another set of two adjacent brackets (20) on the same side, and the second connecting piece (32) is located between two first connecting pieces (31).

7. A battery pack, characterized in that, The device includes a housing (50), a battery cell (40), and a top protection structure as described in any one of claims 1-6, wherein the battery cell (40) and the top protection structure are both installed in the housing (50), and the top protection structure is installed at both ends and on the upper surface of the battery cell (40).

8. A battery pack according to claim 7, characterized in that, The enclosure (50) includes a bottom plate (51) and a frame (52). The frame (52) is installed on the upper surface of the bottom plate (51). The battery cell (40) and the top protective structure are installed in the space formed by the bottom plate (51) and the frame (52).

9. A battery pack according to claim 8, characterized in that, The upper surface of the bottom plate (51) of the enclosure is provided with a crossbeam (53), which is located in the middle of the frame (52) of the enclosure; the battery cell (40) and the top protection structure are installed in the space enclosed by two adjacent crossbeams (53), the frame (52) of the enclosure and the bottom plate (51), and / or the battery cell (40) and the top protection structure are installed in the space enclosed by the crossbeams (53), the frame (52) of the enclosure and the bottom plate (51).

10. A tram, characterized in that, It includes a vehicle body and a battery pack as described in any one of claims 7-9, wherein the battery pack is installed in the vehicle body.

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