Battery pack structure and vehicle

Abstract

The utility model provides a battery pack structure and vehicle, battery pack structure includes box body, battery module and buffer structure, box body includes longitudinal beam, battery module is installed inside box body, battery module includes at least one battery cell group and be provided the frame outside each battery cell group, battery cell group includes a plurality of battery cells, the longitudinal beam is located the upper side of frame, and the buffer structure is located the upper side of frame. The buffer structure is arranged on the lower side of the longitudinal beam in the height direction of the box body, and the frame is connected to the longitudinal beam in a pressing mode through the buffer structure. According to the battery pack structure and the vehicle provided by the utility model, the problems of high maintenance difficulty and high replacement cost of the battery module after the vehicle is collided in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field related to batteries, and in particular to a battery pack structure and a vehicle. Background Art

[0002] CTB stands for Cell to Body. In simple terms, it integrates the battery pack cover with the traditional vehicle body floor to form a sandwich structure of the cover, battery module, and tray, which integrates the battery module and the vehicle body. It has the advantages of light weight and low cost. Because the vehicle body is integrated as part of the battery pack, when the vehicle body is hit sideways, the vehicle body and the battery module will be damaged at the same time. Due to the integrated design of the battery module and the vehicle body, the battery module is difficult to repair and has a high replacement cost. Utility Model Content

[0003] The main purpose of the utility model is to provide a battery pack structure and a vehicle to solve the problems in the prior art of difficulty in repairing and high replacement cost of battery modules after a vehicle collision.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a battery pack structure is provided, which includes a box body, a battery module and a buffer structure, the box body includes a longitudinal beam, the battery module is installed inside the box body, the battery module includes at least one battery cell group and a frame arranged outside each battery cell group, the battery cell group includes a plurality of battery cells, the longitudinal beam is located on the upper side of the frame, and the buffer structure is arranged on the lower side of the longitudinal beam along the height direction of the box body, and the buffer structure crimps the frame onto the longitudinal beam.

[0005] Furthermore, at least two longitudinal beams are arranged along the first direction, and the buffer structure includes anti-collision plates arranged in pairs. The two anti-collision plates arranged in pairs along the first direction are arranged on the lower sides of the longitudinal beams at both ends, and the anti-collision plates extend in the same direction as the longitudinal beams.

[0006] Furthermore, a buffer groove is arranged on the surface of the anti-collision plate facing away from the longitudinal beam, and the buffer groove and the anti-collision plate extend in the same direction.

[0007] Further, the buffer groove is arranged in the middle area or the end area of ​​the anti-collision plate along the first direction; and / or the inner wall surface of the buffer groove is an arc surface or a plane surface.

[0008] Further, the distance between the surfaces of the longitudinal beams at both ends along the first direction that are away from each other is smaller than the distance between the surfaces of the two anti-collision plates that are away from each other.

[0009] Furthermore, at least three longitudinal beams are arranged along the first direction, and an installation area for installing the battery module is formed between two adjacent longitudinal beams along the first direction. The buffer structure also includes an associated plate, which is arranged on the lower side of the longitudinal beam between the two adjacent installation areas.

[0010] Furthermore, the buffer structure is detachably connected to the longitudinal beam.

[0011] Furthermore, the frame includes end plates arranged at intervals along the second direction, the end plates are connected to the crossbeams of the box body; side plates are arranged at intervals along the first direction, the end plates and the side plates are connected end to end in sequence, the side plates have a bending portion extending in a direction away from the battery cell, and the buffer structure crimps the bending portion onto the longitudinal beam.

[0012] Furthermore, the battery module also includes an intermediate plate extending in the same direction as the side plate, the battery cell group includes at least two rows of battery cells, the intermediate plate is arranged between two adjacent rows of battery cells along the first direction, and the intermediate plate is connected to the end plate.

[0013] According to another aspect of the present invention, a vehicle is provided. The vehicle includes the above-mentioned battery pack structure and a vehicle body, wherein the longitudinal beam of the box body of the battery pack structure is connected to the vehicle body.

[0014] Applying the technical solution of the utility model, the battery pack structure includes a box body, a battery module and a buffer structure, the box body includes a longitudinal beam, the battery module is installed inside the box body, the battery module includes at least one battery cell group and a frame arranged outside each battery cell group, the battery cell group includes a plurality of battery cells, the longitudinal beam is located on the upper side of the frame, and the buffer structure is arranged on the lower side of the longitudinal beam along the height direction of the box body, and the buffer structure crimps the frame onto the longitudinal beam.

[0015] From the above, it can be seen that the present application adopts a buffer structure set on the lower side of the longitudinal beam, and the frame is pressed onto the longitudinal beam through the buffer structure. The buffer structure can transmit or absorb the energy during the impact to reduce the damage to the battery cell caused by the impact; at the same time, the frame is pressed onto the longitudinal beam for fixation through the buffer structure, and the crimping area of ​​the connection area between the frame and the longitudinal beam can be increased, thereby improving the stability of the connection between the frame and the longitudinal beam, and between the frame and the buffer structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 An exploded view of the battery pack structure of the present utility model;

[0018] Figure 2 An exploded view of the battery module of the present utility model;

[0019] Figure 3 It is a three-dimensional structural schematic diagram of the box body of the utility model;

[0020] Figure 4 It is an exploded view of the box of the utility model;

[0021] Figure 5 It is a cross-sectional view of the battery pack structure of the present utility model;

[0022] Figure 6 This is a structural schematic diagram of one specific implementation of the anti-collision plate of the utility model;

[0023] Figure 7 It is a structural schematic diagram of another specific implementation method of the anti-collision plate of the utility model;

[0024] Figure 8 It is a structural schematic diagram of another specific implementation method of the anti-collision plate of the utility model;

[0025] Fig. 9 It is a structural schematic diagram of another specific implementation manner of the anti-collision plate of the utility model.

[0026] The above drawings include the following reference numerals:

[0027] 1. Box body; 11. Crossbeam; 12. Longitudinal beam; 13. Bottom plate; 2. Battery module; 21. Battery cell; 22. Frame; 221. End plate; 222. Side plate; 223. Middle plate; 3. Buffer structure; 31. Anti-collision plate; 311. Buffer slot; 32. Associated plate. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0030] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0031] In order to solve the problem of difficulty in repairing and high replacement cost of battery modules after a vehicle collision in the prior art, the utility model provides a battery pack structure and a vehicle, which reduces the damage to the battery module caused by a collision by arranging a buffer structure.

[0032] Embodiment 1

[0033] like Figures 1 to 9 As shown, the battery pack structure includes a box body 1, a battery module 2 and a buffer structure 3, the box body 1 includes a longitudinal beam 12, the battery module 2 is installed inside the box body 1, the battery module 2 includes at least one battery cell group and a frame 22 arranged outside each battery cell group, the battery cell group includes a plurality of battery cells 21, the longitudinal beam 12 is located on the upper side of the frame 22, and the buffer structure 3 is arranged on the lower side of the longitudinal beam 12 of the box body 1 along the height direction of the box body 1, and the buffer structure 3 crimps the frame 22 onto the longitudinal beam 12.

[0034] When a collision occurs in the front and rear positions of the vehicle, the front and rear positions of the battery module 2 are less damaged by the collision because the presence of the front and trunk can play a partial buffering role. When a collision occurs on the side of the vehicle, the battery module 2 will suffer relatively greater damage on the side because there is no corresponding buffering part on the side of the vehicle body. The longitudinal beam 12 is usually extended along the front and rear directions of the vehicle, so the buffer structure 3 is set at the position of the longitudinal beam 12 of the battery pack structure of the vehicle to further protect the battery module 2 by setting the buffer structure 3. When impacted, the buffer structure 3 will deform or break, absorbing the energy generated by the impact, thereby avoiding or reducing the damage to the battery cell 21 caused by the impact.

[0035] The box body 1 may further include a crossbeam 11 and a bottom plate 13. The crossbeam 11 and the longitudinal beam 12 may be multiple and spaced apart. The crossbeam 11 and the longitudinal beam 12 are connected to form a frame structure of the box body 1 for mounting and fixing the battery module. The bottom plate 13 is located at the bottom end of the crossbeam 11 and the longitudinal beam 12, and supports the battery module 2 located in the box body 1.

[0036] It should be noted that when impacted, on the one hand, the buffer structure 3 can transfer the impact force to the cross beam 11 via the longitudinal beam 12, and on the other hand, the buffer structure 3 will deform or break to absorb the energy generated by the impact, thereby avoiding or reducing the damage to the battery cell 21 caused by the impact.

[0037] In this embodiment, at least two longitudinal beams 12 are provided along the first direction, and the buffer structure 3 includes a pair of anti-collision plates 31, and the two anti-collision plates 31 provided in pairs along the first direction are provided on the lower side of the longitudinal beams 12 at both ends. The anti-collision plates 31 are provided below the longitudinal beams at both ends in the first direction, thereby protecting both sides of the battery module 2. The anti-collision plates 31 extend in the same direction as the longitudinal beams 12.

[0038] Among them, the first direction Figure 1 The X direction in the second direction is Figure 1 in the Y direction.

[0039] Furthermore, the buffer structure 3 and the longitudinal beam 12 are detachably connected to facilitate disassembly of the buffer structure 3 and the longitudinal beam 12 for replacement and maintenance when necessary.

[0040] The anti-collision plate 31 can press the frame 22 onto the longitudinal beam 12, and the three are connected and fixed by a connecting piece. At the same time, in order to facilitate the detachable connection between the buffer structure 3 and the longitudinal beam 12, in this embodiment, the connecting piece can be a structural member such as a bolt. The anti-collision plate 31 can increase the pressing area of ​​the bolt connection of the frame 22, reduce the stress on the frame 22 due to the connection, and thus improve the bearing capacity of the frame 22.

[0041] like Figures 1 to 9 As shown, the anti-collision plate 31 and the longitudinal beam 12 extend in the same direction, and a buffer groove 311 is provided on the surface of the anti-collision plate 31 away from the longitudinal beam 12 , and the buffer groove 311 and the anti-collision plate 31 extend in the same direction.

[0042] The buffer groove 311 is used to buffer the impact force on the anti-collision plate 31. The buffer groove 311 is provided on the anti-collision plate 31, so that there is a relatively weak structural strength portion on the anti-collision plate 31, namely, the structure of the buffer groove 311. When the impact force on the anti-collision plate 31 is greater than the bearing capacity of the buffer structure 3, the position of the buffer groove 311 is more likely to bend, deform or break, so that the anti-collision plate 31 can better absorb the energy generated during the collision.

[0043] Further, the buffer groove 311 may be disposed in the middle area of ​​the anti-collision plate 31 along the first direction.

[0044] Furthermore, the buffer groove 311 along the first direction can also be set in the end area of ​​the anti-collision plate 31. Of course, multiple buffer grooves 311 can also be set, one of the multiple buffer grooves 311 is set in the middle area of ​​the anti-collision plate 31, and another one of the multiple buffer grooves 311 is set in the end area of ​​the anti-collision plate 31.

[0045] Furthermore, the inner wall surface of the buffer groove 311 is an arc-shaped surface. In this case, the buffer groove 311 is an arc-shaped groove.

[0046] Furthermore, the inner wall surface of the buffer groove 311 is not limited to the arc surface mentioned above, and the inner wall surface of the buffer groove 311 can also be a plane, that is, the buffer groove 311 is a rectangular groove.

[0047] In this embodiment, the distance between the surfaces of the longitudinal beams 12 at both ends along the first direction that are away from each other is smaller than the distance between the surfaces of the two anti-collision plates 31 that are away from each other.

[0048] By adopting the above-mentioned solution, part of the anti-collision plate 31 can be located on the outside of the longitudinal beam 12. When a side collision occurs on the vehicle, the external force first contacts the anti-collision plate 31, and the anti-collision plate 31 buffers the impact force. The anti-collision plate 31 can better protect the battery module 2.

[0049] Furthermore, at least three longitudinal beams 12 are arranged along the first direction, and an installation area for installing the battery module 2 is formed between two adjacent longitudinal beams 12 along the first direction. The buffer structure 3 also includes an associated plate 32, which is arranged on the lower side of the longitudinal beam 12 between two adjacent installation areas.

[0050] The association plate 32 is connected to the frames 22 of two adjacent battery modules 2 arranged along the first direction. Since no collision will occur at the middle position of the two battery modules 2, the anti-collision plate 31 is replaced by the association plate 32 at this position. Similarly, the association plate 32, the frame 22 and the longitudinal beam 12 are connected. The setting of the association plate 32 can increase the crimping area of ​​the frame 22, thereby improving the bearing capacity of the frame 22, thereby improving the overall stability of the battery pack structure.

[0051] Further, one or more associated plates 32 are provided. When there are multiple associated plates 32, the multiple associated plates 32 are spaced apart along the first direction.

[0052] like Figures 1 to 4 As shown, the frame 22 includes end plates 221 and side plates 222, the end plates 221 are arranged in pairs and spaced apart along the second direction, the end plates 221 are connected to the crossbeam 11 of the box body 1, the side plates 222 are arranged in pairs and spaced apart along the first direction, the end plates 221 and the side plates 222 are connected end to end in sequence to form a frame 22 arranged outside the battery cell 21, the side plates 222 have a bent portion extending in a direction away from the battery cell 21, and the buffer structure 3 crimps the bent portion onto the longitudinal beam 12.

[0053] Specifically, the frame 22 composed of the end plate 221 and the side plate 222 fixes and protects the battery cell 21. The frame 22 is connected to the box body 1 through the bent portion of the side plate 22, which increases the stability of the frame 22 installation, so that the frame 22 can better fix and protect the battery cell 21.

[0054] Furthermore, the battery module 2 also includes an intermediate plate 223 extending in the same direction as the side plate 222 . The battery cell group includes at least two rows of battery cells 21 . The intermediate plate 223 is arranged between two adjacent rows of battery cells 21 along the first direction. The intermediate plate 223 is connected to the end plate 221 .

[0055] In this embodiment, the middle plate 223 separates two adjacent rows of battery cells 21 along the first direction. The fixed connection between the middle plate 223 and the end plate can limit and fix the battery cells 21, avoid collision between the two rows of battery cells 21, and increase the structural strength of the battery module; at the same time, after the middle plate 223 contacts the battery cells 21, it can dissipate heat for the battery cells 21, reduce heat accumulation when the battery cells 21 are working, and improve heat dissipation efficiency.

[0056] Embodiment 2

[0057] This embodiment provides a vehicle, which includes the battery pack structure and a vehicle body in the first embodiment, and the longitudinal beam 12 of the box body 1 of the battery pack structure is connected to the vehicle body.

[0058] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0059] 1. The present application adopts a buffer structure 3 provided on the lower side of the longitudinal beam 12 , and the buffer structure 3 presses the frame 22 onto the longitudinal beam 12 . The buffer structure 3 can transmit or absorb the energy during the impact, so as to reduce the damage to the battery cell 21 caused by the impact.

[0060] 2. The frame 22 is crimped onto the longitudinal beam 12 for fixation through the buffer structure 3, which can also increase the crimping area of ​​the connection area between the frame 22 and the longitudinal beam 12, thereby improving the stability of the connection between the frame 22 and the longitudinal beam 12 and between the frame 22 and the buffer structure 3.

[0061] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0062] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0063] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0064] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A battery pack structure, characterized in that: include: A box body (1), wherein the box body (1) comprises a longitudinal beam (12); A battery module (2), the battery module (2) being installed inside the box (1), the battery module (2) comprising at least one battery cell group and a frame (22) arranged outside each of the battery cell groups, the battery cell group comprising a plurality of battery cells (21), the longitudinal beam (12) being located on the upper side of the frame (22); A buffer structure (3) is arranged on the lower side of the longitudinal beam (12) along the height direction of the box body (1), and the buffer structure (3) presses the frame (22) onto the longitudinal beam (12).

2. The battery pack structure according to claim 1, characterized in that: At least two longitudinal beams (12) are arranged along a first direction, and the buffer structure (3) includes anti-collision plates (31) arranged in pairs, and the two anti-collision plates (31) arranged in pairs along the first direction are arranged on the lower side of the longitudinal beam (12) at both ends, and the anti-collision plates (31) extend in the same direction as the longitudinal beam (12).

3. The battery pack structure according to claim 2, characterized in that: A buffer groove (311) is provided on the surface of the anti-collision plate (31) facing away from the longitudinal beam (12), and the buffer groove (311) extends in the same direction as the anti-collision plate (31).

4. The battery pack structure according to claim 3, characterized in that: The buffer groove (311) is arranged in the middle area or the end area of ​​the anti-collision plate (31) along the first direction; and / or The inner wall surface of the buffer groove (311) is an arc-shaped surface or a plane surface.

5. The battery pack structure according to claim 2, characterized in that: The distance between the surfaces of the longitudinal beams (12) at both ends along the first direction that are away from each other is smaller than the distance between the surfaces of the two anti-collision plates (31) that are away from each other.

6. The battery pack structure according to claim 1, characterized in that: At least three longitudinal beams (12) are arranged along the first direction, and an installation area for installing the battery module (2) is formed between two adjacent longitudinal beams (12) along the first direction. The buffer structure (3) also includes an associated plate (32), and the associated plate (32) is arranged on the lower side of the longitudinal beam (12) between two adjacent installation areas.

7. The battery pack structure according to claim 1, characterized in that: The buffer structure (3) and the longitudinal beam (12) are detachably connected.

8. The battery pack structure according to any one of claims 1 to 7, characterized in that: The framework (22) comprises: End plates (221) arranged at intervals along the second direction, the end plates (221) being connected to the crossbeam (11) of the box body (1); Side plates (222) are arranged at intervals along a first direction, the end plates (221) and the side plates (222) are connected end to end in sequence, the side plates (222) have a bent portion extending in a direction away from the battery core (21), and the buffer structure (3) presses the bent portion onto the longitudinal beam (12).

9. The battery pack structure according to claim 8, characterized in that: The battery module (2) further comprises an intermediate plate (223) extending in the same direction as the side plate (222); the battery cell group comprises at least two rows of battery cells (21); the intermediate plate (223) is arranged between two adjacent rows of battery cells (21) along the first direction; and the intermediate plate (223) is connected to the end plate (221).

10. A vehicle, characterized in that: The vehicle comprises the battery pack structure according to any one of claims 1 to 9 and a vehicle body, wherein a longitudinal beam (12) of a box body (1) of the battery pack structure is connected to the vehicle body.

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