Anti-collision device and battery pack

Abstract

The utility model relates to an anti-collision device and a battery pack, and belongs to the technical field of new energy lithium batteries. The anti-collision device comprises an anti-collision piece, the anti-collision piece comprises a first mounting part, a collision part and a second mounting part, the first mounting part and the second mounting part are arranged on the two sides of the collision part respectively, and the collision part is connected with the first mounting part and the second mounting part through connecting parts respectively. The anti-collision piece is installed at the bottom of the battery pack through the first installation part and the second installation part in the anti-collision piece, the sealing face of the battery pack is avoided through the collision part and the connection part in the anti-collision piece when the bottom of a vehicle is scraped, the whole vehicle and the battery pack jump up after bottom scraping, and damage to the bottoms of more battery cells is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of new energy lithium battery technology, specifically relating to an anti-collision device and a battery pack. Background Technology

[0002] The safety of battery packs in new energy vehicles has attracted widespread public attention. Located at the bottom of the vehicle, the battery pack is severely threatened by scraping. Currently, most CTP and CTV battery packs on the market adopt a liquid-cooled integrated design. The bottom of the battery pack is sealed to the frame via a liquid cooling plate (the liquid cooling plate and frame form a box structure, housing the battery pack's module components; after sealing the liquid cooling plate and frame, a bottom protective plate is further sealed at the bottom of the liquid cooling plate). Located at the bottom edge of the battery pack, there is no protective structure for the sealing surface. When the battery pack is scraped, the sealing surface is the first to be damaged, leading to the failure of the bottom seal. Secondly, the lifting height of the sealing surface after the scraping impact is insufficient, and the clearance is too short, failing to prevent damage to more cells at the bottom and affecting the amount of cell intrusion, thus causing cell safety issues. Utility Model Content

[0003] To address the above problems, this utility model provides an anti-collision device and a battery pack.

[0004] The first objective of this utility model is to provide an anti-collision device, including an anti-collision component. The anti-collision component includes a first mounting part, an impact part, and a second mounting part. The first mounting part and the second mounting part are respectively disposed on both sides of the impact part. The impact part is respectively connected to the first mounting part and the second mounting part through connecting parts.

[0005] The first mounting part and the second mounting part are used to install the anti-collision component at the bottom of the battery pack;

[0006] Both the impact part and the connecting part are used to withstand external impacts and play a collision protection role.

[0007] Furthermore, the connecting part is wavy.

[0008] Furthermore, the anti-collision device also includes a seal, the cross-section of which is U-shaped in the vertical axis;

[0009] The frame of the battery pack is embedded in the "U"-shaped groove of the seal.

[0010] Furthermore, the "U"-shaped bottom of the seal is configured as a sealing part, and the two "U"-shaped side walls of the seal are configured as third mounting parts;

[0011] The sealing part is attached to the bottom wall of the frame, and the third mounting part is interference-fitted with the side wall of the frame.

[0012] Furthermore, the third mounting part is connected to the side wall of the frame by welding.

[0013] Furthermore, either the first mounting part or the second mounting part is fixedly connected to the frame of the battery pack via a first fastener, and the remaining mounting part of the second mounting part or the first mounting part is fixedly connected to the bottom protective plate of the battery pack via a second fastener.

[0014] Furthermore, a sealing gasket is provided between the frame and the first mounting part or the second mounting part, and the first fixing member passes through the first mounting part or the second mounting part, the sealing gasket and the side wall of the frame in sequence, and is fixed inside the frame.

[0015] Furthermore, the second fastener passes through the bottom protective plate, the liquid cooling plate of the battery pack, and the bottom wall of the frame in sequence, and is fixed inside the frame.

[0016] Furthermore, after the anti-collision component is installed at the bottom of the battery pack, an anti-collision gap is formed between the first mounting part, the second mounting part, the impact part, the connecting part and the frame;

[0017] The bottom of the anti-collision gap is lower than the bottom guard plate.

[0018] The second objective of this invention is to provide a battery pack that includes the aforementioned anti-collision device.

[0019] This utility model provides an anti-collision device and battery pack. Through the first mounting part and the second mounting part in the anti-collision component, the anti-collision component is installed at the bottom of the battery pack. Through the impact part and the connecting part in the anti-collision component, the battery pack sealing surface is avoided when the vehicle encounters a scrape. After the scrape, the entire vehicle and the battery pack jump up, avoiding damage to the bottom of more battery cells.

[0020] This invention increases the rigidity of the bottom sealing surface of the battery pack by setting a sealing element, making the sealing surface less prone to deformation during bottom scraping and impact, thus ensuring a seal.

[0021] This invention utilizes a wave-shaped design in the connecting part of the anti-collision component, enabling the connecting part to absorb the impact force through deformation, thereby reducing impact energy. At the same time, it causes the battery pack to bounce upwards, preventing more cells from being damaged, reducing cell intrusion, and minimizing cell safety issues. This allows the connecting part to both withstand external impacts and function as an energy absorption zone.

[0022] 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

[0023] 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.

[0024] Figure 1 A schematic diagram of a collision avoidance device according to an embodiment of the present invention is shown;

[0025] Figure 2 It shows Figure 1 Enlarged view of point A in the middle;

[0026] Figure 3 A schematic diagram of the connecting part is shown;

[0027] Figure 4 A schematic diagram of the seal according to an embodiment of the present invention is shown;

[0028] Figure 5 It shows Figure 2 Enlarged view of point B in the middle;

[0029] Figure 6 A diagram showing the completed installation of the anti-collision component at the bottom of the battery pack according to an embodiment of the present invention is provided.

[0030] Figure 7 It shows Figure 5 Enlarged view of point C in the middle;

[0031] Figure 8 This diagram shows a partial cross-sectional view of the anti-collision component and the U-shaped beam after assembly according to an embodiment of the present invention;

[0032] In the diagram: 10. Anti-collision component; 11. First mounting part; 12. Second mounting part; 13. Connecting part; 13-1. First bend; 13-2. Second bend; 13-3. Third bend; 13-4. Fourth bend; 13-5. Fifth bend; 13-6. Sixth bend; 13-7. Seventh bend; 13-8. Eighth bend; 13-9. Ninth bend; 14. Impact part; 20. Seal; 21. Seal part; 22. Third mounting part; 30. Frame; 40. First fixing part; 50. Sealing gasket; 60. Second fixing part; 70. Bottom guard plate; 80. Liquid cooling plate; 90. Anti-collision gap. Detailed Implementation

[0033] 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.

[0034] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements 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.

[0035] like Figure 1 As shown, an anti-collision device according to an embodiment of the present utility model includes an anti-collision member 10, such as... Figure 2 As shown, the anti-collision component 10 includes a first mounting part 11, an impact part 14, and a second mounting part 12. The first mounting part 11 and the second mounting part 12 are respectively disposed on both sides of the impact part 14. The impact part 14 is connected to the first mounting part 11 and the second mounting part 12 respectively through a connecting part 13.

[0036] The first mounting part 11 and the second mounting part 12 are used to install the anti-collision member 10 at the bottom of the battery pack (see details). Figure 6 );

[0037] Both the impact part 14 and the connecting part 13 are used to withstand external impacts and play a collision-proof role. When the vehicle encounters a scrape, it avoids the battery pack sealing surface. After the scrape, the whole vehicle and the battery pack jump up, avoiding damage to the bottom of more cells.

[0038] In some embodiments of this utility model, the connecting part 13 is wavy. By utilizing the deformation advantage of the wavy shape, the connecting part 13 can absorb the impact energy through deformation, thereby reducing the impact energy. At the same time, it allows the battery pack to jump upward, avoiding damage to more battery cells, reducing the amount of battery cell intrusion, and reducing battery cell safety issues. That is, the connecting part 13 can both withstand external impact and function as an energy absorption zone.

[0039] In some embodiments of this utility model, such as Figure 3 As shown, the wavy structure of the connecting portion 13 connecting the first mounting portion 11 and the impact portion 14 includes: a first bend 13-1, a second bend 13-2, a third bend 13-3, and a fourth bend 13-4 connected in sequence, wherein the arc of the second bend 13-2 is inward ( Figure 8 (Inner 90mm of the center anti-collision gap) is recessed;

[0040] The wavy structure of the connecting portion 13, which connects the second mounting portion 12 and the impact portion 14, includes: a fifth bend 13-5, a sixth bend 13-6, a seventh bend 13-7, an eighth bend 13-8, and a ninth bend 13-9 connected in sequence, wherein the arc of the sixth bend 13-6 is inward ( Figure 8 The center anti-collision gap (within 90) is recessed.

[0041] like Figure 4 As shown, in some embodiments of the present invention, the anti-collision device further includes a sealing element 20, the sealing element 20 having a "U" shaped cross section perpendicular to the axial direction;

[0042] The frame 30 of the battery pack is embedded in the "U"-shaped groove of the seal 20;

[0043] In this embodiment, the sealing element 20 increases the rigidity of the bottom sealing surface of the battery pack, making the sealing surface less prone to deformation during bottom impact and ensuring a seal.

[0044] like Figure 5 As shown, in some embodiments of the present invention, the "U"-shaped bottom of the sealing member 20 is configured as a sealing part 21, and the two "U"-shaped side walls of the sealing member 20 are configured as third mounting parts 22;

[0045] The sealing part 21 is attached to the bottom wall of the frame 30, and the third mounting part 22 is interference-fitted with the side wall of the frame 30.

[0046] In some embodiments of this utility model, after the third mounting part 22 is interference-fitted with the side wall of the frame 30, the third mounting part 22 and the side wall of the frame 30 are connected by welding, which further strengthens the rigidity of the sealing surface formed when the sealing member 20 is sealing.

[0047] like Figure 7 As shown, in some embodiments of this utility model, any one of the first mounting part 11 and the second mounting part 12 is fixedly connected to the frame 30 of the battery pack by a first fastener 40, and the remaining mounting part of the second mounting part 12 and the first mounting part 11 is fixedly connected to the bottom protective plate 70 of the battery pack by a second fastener 60 (see details). Figure 8 That is, through the connection relationship between the first mounting part 11, the second mounting part 12 and the frame 30 and the bottom protective plate 70, the anti-collision component 10 is installed at the bottom of the battery pack;

[0048] Specifically, if the sidewall of the frame 30 is fixedly connected to the first mounting part 11, then the bottom guard plate 70 is fixedly connected to the second mounting part 12; conversely, if the sidewall of the frame 30 is fixedly connected to the second mounting part 12, then the bottom guard plate 70 is fixedly connected to the first mounting part 11.

[0049] For example, both the first fastener 40 and the second fastener 60 are bolts.

[0050] In some embodiments of this utility model, a sealing gasket 50 is provided between the frame 30 and the first mounting part 11 or the second mounting part 12, and the first fixing member 40 passes through the first mounting part 11 or the second mounting part 12, the sealing gasket 50 and the side wall of the frame 30 in sequence, and is fixed inside the frame 30.

[0051] In this embodiment, the sealing gasket 50 avoids the problem of reduced sealing caused by drilling holes in the first fixing member 40.

[0052] In some embodiments of this utility model, the second fixing member 60 sequentially passes through the second mounting part 12 or the first mounting part 11, the bottom protective plate 70, the liquid cooling plate 80 of the battery pack and the bottom wall of the frame 30, and is fixed inside the frame 30.

[0053] In this embodiment, the second fixing member 60 connects the anti-collision member 10, the bottom guard plate 70, the liquid cooling plate 80 and the frame 30, thereby improving the stability of the anti-collision member 10 during installation.

[0054] In some embodiments of this utility model, the second fixing member 60 sequentially passes through the second mounting part 12 or the first mounting part 11, the bottom protective plate 70, the liquid cooling plate 80 of the battery pack, the sealing member 20 and the bottom wall of the frame 30, and is fixed inside the frame 30.

[0055] In this embodiment, to accommodate the setting of the sealing element 20, the two fasteners 60 are used to connect the anti-collision element 10, the bottom guard plate 70, the liquid cooling plate 80, the sealing element 20 and the frame 30.

[0056] In some embodiments of this utility model, when the third mounting part 22 is connected to the side wall of the frame 30 by welding, the weld formed on the side wall of the frame 30 is misaligned with the through hole on the side wall of the frame 30 that accommodates the first fixing member 40.

[0057] In some embodiments of the present invention, the through holes on the side wall of the frame 30, the bottom wall of the frame 30, the sealing member 20, the liquid cooling plate 80, and the bottom protective plate 70 that match the first fixing member 40 or the second fixing member 60 are pre-drilled.

[0058] In some embodiments of the present invention, after the anti-collision member 10 is installed at the bottom of the battery pack, an anti-collision gap 90 is formed between the first mounting part 11, the second mounting part 12, the impact part 14, the connecting part 13 and the frame 30.

[0059] The bottom of the anti-collision gap 90 is lower than the bottom guard plate 70 to improve the anti-collision effect of the anti-collision component 10.

[0060] A battery pack according to an embodiment of the present invention includes the anti-collision device described in the above embodiment.

[0061] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0062] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A collision avoidance device, characterized in that, The device includes a crash protection component (10), which includes a first mounting part (11), an impact part (14), and a second mounting part (12). The first mounting part (11) and the second mounting part (12) are respectively disposed on both sides of the impact part (14), and the impact part (14) is connected to the first mounting part (11) and the second mounting part (12) respectively through a connecting part (13).

2. The anti-collision device according to claim 1, characterized in that, The connecting part (13) is wavy.

3. The anti-collision device according to claim 1, characterized in that, It also includes a seal (20), the seal (20) having a "U" shaped cross section perpendicular to the axial direction; The frame (30) of the battery pack is fitted into the "U"-shaped groove of the seal (20).

4. The anti-collision device according to claim 3, characterized in that, The "U"-shaped bottom of the seal (20) is configured as a sealing part (21), and the two "U"-shaped side walls of the seal (20) are configured as third mounting parts (22); The sealing part (21) is attached to the bottom wall of the frame (30), and the third mounting part (22) is interference-fitted with the side wall of the frame (30).

5. The anti-collision device according to claim 4, characterized in that, The third mounting part (22) is connected to the side wall of the frame (30) by welding.

6. A collision avoidance device according to any one of claims 1-5, characterized in that, Either the first mounting part (11) or the second mounting part (12) is fixedly connected to the frame (30) of the battery pack by a first fastener (40), and the remaining mounting part of the second mounting part (12) or the first mounting part (11) is fixedly connected to the bottom protective plate (70) of the battery pack by a second fastener (60).

7. The anti-collision device according to claim 6, characterized in that, A sealing gasket (50) is provided between the frame (30) and the first mounting part (11) or the second mounting part (12). The first fixing member (40) passes through the first mounting part (11) or the second mounting part (12), the sealing gasket (50) and the side wall of the frame (30) in sequence, and is fixed inside the frame (30).

8. A collision avoidance device according to claim 6, characterized in that, The second fastener (60) passes through the second mounting part (12) or the first mounting part (11), the bottom protective plate (70), the liquid cooling plate (80) of the battery pack and the bottom wall of the frame (30) in sequence, and is fixed inside the frame (30).

9. The anti-collision device according to claim 1, characterized in that, After the anti-collision component (10) is installed at the bottom of the battery pack, the first mounting part (11), the second mounting part (12), the impact part (14), the connecting part (13) and the frame (30) form an anti-collision gap (90); The bottom of the anti-collision gap (90) is lower than the bottom protective plate (70) of the battery pack.

10. A battery pack, characterized in that, Includes the anti-collision device as described in any one of claims 1-9.

Images