Bottom scraping prevention structure of battery pack

Abstract

The utility model discloses a bottom scraping prevention structure for a battery pack, which relates to the technical field of new energy lithium batteries and comprises a frame, a liquid cooling plate and a protective plate. The frame is of a hollow structure and is filled with pouring sealant. An anti-collision boss is arranged at the bottom of the frame, a sealing boss protruding towards the interior of the battery pack box body is arranged on the lower portion of the frame, and the bottom face of the sealing boss serves as a sealing face. The liquid cooling plate and the protective plate are arranged from top to bottom and are fixedly connected to the bottom of the sealing boss, and the bottom surface of the protective plate is higher than the bottom surface of the anti-collision boss. The battery pack bottom scraping sealing device has the advantages that the sealing performance of a battery pack bottom scraping working condition is ensured, the number of damaged battery cells in the battery pack and the intrusion amount of the battery cells are reduced, and the safety risk of the battery cells is reduced.

Description

Technical Field

[0001] This utility model relates to the field of new energy lithium battery technology, and in particular to a battery pack structure to prevent bottom scratches. 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 employ a liquid-cooled integrated design, with the bottom of the battery pack frame sealed by a liquid cooling plate. However, there is no protective structure for the bottom sealing surface of the battery pack frame. When the battery pack is scraped, the sealing surface is the first to be damaged, leading to seal failure at the bottom of the battery pack. Furthermore, the bottom of the battery pack frame is easily damaged at the bottom of the internal cells after a scraping impact, causing cell safety issues. Utility Model Content

[0003] The technical problem to be solved by this utility model is how to ensure the sealing of the battery pack under the scraping condition and reduce the safety risks of the battery cells.

[0004] This utility model solves the above-mentioned technical problems through the following technical means: a battery pack anti-scratching structure, including a frame, a liquid cooling plate, and a protective plate; the frame is a hollow structure, and its interior is filled with potting compound; the bottom of the frame is provided with an anti-collision protrusion, and the lower part of the frame is provided with a sealing protrusion protruding into the battery pack housing, the bottom surface of the sealing protrusion serving as a sealing surface; the liquid cooling plate and the protective plate are arranged from top to bottom and fixedly connected to the bottom of the sealing protrusion, and the bottom surface of the protective plate is higher than the bottom surface of the anti-collision protrusion.

[0005] When the battery pack encounters a bottom-scraping condition, it first impacts the anti-collision protrusion, causing the battery pack to jump upwards. Energy is absorbed through the potting compound, preventing damage to the sealing surface and ensuring the sealing performance of the battery pack under bottom-scraping conditions. This reduces the number of damaged cells and the amount of cell intrusion inside the battery pack, thereby lowering the safety risks to the cells.

[0006] Preferably, a rivet nut is fixed through the top of the sealing boss, and a mounting hole corresponding to the position of the rivet nut is opened at the bottom of the sealing boss. A rivet bolt passing through the liquid cooling plate and the protective plate enters the mounting hole and is screwed into the rivet nut, thereby fixing the liquid cooling plate and the protective plate to the sealing boss.

[0007] Easy to assemble and has a good sealing effect.

[0008] Preferably, the inner wall of the mounting hole is coated with sealant.

[0009] This further improves the sealing effect.

[0010] Preferably, the sealing boss and the liquid cooling plate are bonded together with sealant.

[0011] When assembling the liquid cooling plate, first apply sealant to the bottom surface of the sealing boss, then use the liquid cooling plate to press the sealant into the sealing boss for a good sealing effect.

[0012] Preferably, sealing foam is provided between the liquid cooling plate and the protective plate.

[0013] It improves the sealing effect.

[0014] Preferably, the sealing foam is adhered to the bottom surface of the liquid cooling plate.

[0015] Easy to assemble and has a good sealing effect.

[0016] Preferably, both ends of the frame are sealed with sealing plates.

[0017] It facilitates filling the inside of the frame with potting compound.

[0018] Preferably, the sealing plate is fully welded to the frame.

[0019] Good sealing effect

[0020] Preferably, the module inside the battery pack is mounted on the top surface of the sealing boss.

[0021] The sealing boss is used for both sealing the liquid cooling plate and mounting the module, and has a compact structure.

[0022] Preferably, the module end plate is fixedly connected to the top surface of the sealing boss by tie rod bolts.

[0023] Easy to assemble and disassemble. Attached Figure Description

[0024] Figure 1 This is an isometric schematic diagram of the battery pack anti-scratching structure according to an embodiment of the present invention.

[0025] Figure 2 This is a partially enlarged schematic diagram of section A of the battery pack anti-scratching structure in an embodiment of this utility model.

[0026] Figure 3 This is an isometric view of the frame of an embodiment of this utility model.

[0027] Figure 4 This is a partial cross-sectional schematic diagram of the battery pack anti-scratching structure according to an embodiment of the present invention. Detailed Implementation

[0028] 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 in conjunction with the embodiments of this utility model. 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.

[0029] like Figures 1 to 4 As shown in the figure, this utility model embodiment discloses a battery pack anti-scratching structure, including a sealing plate 1, a frame 2, potting compound 3, rivet nuts 4, rivet bolts 5, a liquid cooling plate 6, and a protective plate 7.

[0030] The frame 2 has a hollow structure and is filled with potting compound 3. The bottom of the frame 2 is provided with an anti-collision protrusion 21, and the lower part of the frame 2 is provided with a sealing protrusion 22 that protrudes into the battery pack housing. The bottom surface of the sealing protrusion 22 serves as a sealing surface. The liquid cooling plate 6 and the protective plate 7 are set from top to bottom and fixedly connected to the bottom of the sealing protrusion 22. The bottom surface of the protective plate 7 is higher than the bottom surface of the anti-collision protrusion 21. When the battery pack encounters a bottom-scraping condition, it first impacts the anti-collision protrusion 21, causing the battery pack to jump upwards and absorb energy through the potting compound 3. This avoids damage to the sealing surface, ensures the sealing performance of the battery pack under bottom-scraping conditions, reduces the number of damaged cells and the amount of cell intrusion inside the battery pack, and reduces the cell safety risk.

[0031] Both ends of the frame 2 are sealed by the sealing plate 1, and the sealing plate 1 is fully welded to the frame 2. During the manufacturing process, one end of the frame 2 is first fully welded and sealed with the sealing plate 1, and then the other end of the frame 2 is filled with potting compound 3. Finally, the other end of the frame 2 is fully welded and sealed with the sealing plate 1, resulting in a good sealing effect.

[0032] A rivet nut 4 is fixed through the top of the sealing boss 22, and a mounting hole 23 corresponding to the position of the rivet nut 4 is opened at the bottom of the sealing boss 22. The rivet bolt 5, which passes through the liquid cooling plate 6 and the protective plate 7, enters the mounting hole 23 and is screwed into the rivet nut 4, thus fixing the liquid cooling plate 6 and the protective plate 7 to the sealing boss 22, which is convenient for assembly and has a good sealing effect. The inner wall of the mounting hole 23 is coated with sealant, which further improves the sealing effect.

[0033] The sealing boss 22 and the liquid cooling plate 6 are bonded together with sealant. When assembling the liquid cooling plate 6, the sealant is first applied to the bottom surface of the sealing boss 22, and then the liquid cooling plate 6 is used to press the sealant to bond it to the sealing boss 22, resulting in a good sealing effect.

[0034] A sealing foam is provided between the liquid cooling plate 6 and the protective plate 7 to improve the sealing effect; the sealing foam is pre-adheded to the bottom surface of the liquid cooling plate 6 for easy assembly and good sealing effect.

[0035] The modules inside the battery pack are installed on the top surface of the sealing boss 22. The sealing boss 22 is used to seal and install the liquid cooling plate 6 and the modules, and the structure is compact. The module end plate is fixedly connected to the top surface of the sealing boss 22 by tie rod bolts, which facilitates disassembly and assembly.

[0036] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model 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. Such 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 this utility model.

Claims

1. A battery pack anti-scratching structure, characterized in that: It includes a frame, a liquid cooling plate, and a protective plate; the frame has a hollow structure and is filled with potting compound; the bottom of the frame is provided with an anti-collision protrusion, and the lower part of the frame is provided with a sealing protrusion that protrudes into the battery pack housing, the bottom surface of the sealing protrusion serving as a sealing surface; the liquid cooling plate and the protective plate are arranged from top to bottom and fixedly connected to the bottom of the sealing protrusion, the bottom surface of the protective plate being higher than the bottom surface of the anti-collision protrusion.

2. The battery pack anti-scratching structure according to claim 1, characterized in that: A rivet nut is fixed through the top of the sealing boss, and a mounting hole corresponding to the position of the rivet nut is opened at the bottom of the sealing boss. The rivet bolt passing through the liquid cooling plate and the protective plate enters the mounting hole and is screwed into the rivet nut, thereby fixing the liquid cooling plate and the protective plate to the sealing boss.

3. The battery pack anti-scratching structure according to claim 2, characterized in that: The inner wall of the mounting hole is coated with sealant.

4. The battery pack anti-scratching structure according to claim 1, characterized in that: The sealing boss is bonded to the liquid cooling plate with sealant.

5. The battery pack anti-scratching structure according to claim 1, characterized in that: A sealing foam is provided between the liquid cooling plate and the protective plate.

6. The battery pack anti-scratching structure according to claim 5, characterized in that: The sealing foam is adhered to the bottom surface of the liquid cooling plate.

7. The battery pack anti-scratching structure according to claim 1, characterized in that: Both ends of the frame are sealed with end plates.

8. The battery pack anti-scratching structure according to claim 7, characterized in that: The sealing plate is fully welded to the frame.

9. The battery pack anti-scratching structure according to claim 1, characterized in that: The modules inside the battery pack are mounted on the top surface of the sealing boss.

10. The battery pack anti-scratching structure according to claim 9, characterized in that: The module end plate is fixedly connected to the top surface of the sealing boss by tie rod bolts.

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