Battery pack and automobile

Abstract

The application discloses a battery pack and a car, the battery pack provided by the application is provided with a plurality of battery cells in a battery pack box body, a safety valve is arranged on the battery pack box body, a fireproof assembly is arranged at a valve port of the safety valve, the fireproof assembly comprises a mounting piece and a fireproof piece which are fixedly connected as a whole, the mounting piece is fixedly connected with the battery pack box body, and the fireproof piece is a honeycomb thin-wall structure; in the case that the battery cells are out of control, the safety valve on the battery pack box body is opened, so that the flame and the smoke are discharged from the safety valve; when passing through the valve port of the safety valve, the flame passes through the fireproof piece, the honeycomb structure of the fireproof piece makes the flame zigzag in the fireproof piece, thereby increasing the transmission path of the flame, reducing the temperature of the flame in the transmission process, cooling and extinguishing the flame in the process of passing through the fireproof piece, and making the overflowed battery pack be mainly smoke without open flame, so that the flame overflow of the battery pack is reduced, and the safety hazard of the whole vehicle is reduced.

Description

Technical Field

[0001] This application relates to the field of battery pack technology, and more specifically, to a battery pack and an automobile. Background Technology

[0002] With the widespread application of new energy vehicles, the requirements for battery range are also increasing. Therefore, more battery cells are needed to provide longer range. However, as the cell density increases, the risk of cell runaway increases. When a cell runs away from the battery pack, the flames from the cell burst out, posing a safety hazard to the entire vehicle.

[0003] In conclusion, how to reduce battery pack flame spillage and lower the overall vehicle safety risks is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a battery pack and automobile that reduces battery pack flame spillage and lowers the overall vehicle safety hazards.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A battery pack, characterized in that it comprises: a battery pack housing, wherein a plurality of battery cells are placed inside the battery pack housing; the battery pack housing is provided with a safety valve, and a fireproof component is provided at the valve port of the safety valve; the fireproof component includes a mounting component and a fireproof component that are fixedly connected, the mounting component being fixedly connected to the battery pack housing, and the fireproof component having a honeycomb thin-walled structure.

[0007] In some embodiments, the fire-resistant component is mounted on the side of the safety valve closest to the battery cell.

[0008] In some embodiments, the fireproof component has a labyrinthine passageway formed inside.

[0009] In some embodiments, the fireproof component is a metal sheet stamping.

[0010] In some embodiments, the fireproof component is an aluminum plate stamping or a copper plate stamping.

[0011] In some embodiments, the mounting component is a thin-walled structure and is a metal stamping part, and the mounting component is fixedly connected to the battery pack housing by threaded fasteners.

[0012] In some embodiments, the fireproof component and the valve port of the safety valve are contoured structures.

[0013] In some embodiments, the area of ​​the fireproof component is larger than the valve port area of ​​the safety valve, so that the fireproof component covers the valve port of the safety valve.

[0014] In some embodiments, the safety valve is located on the side wall of the battery pack housing; or, the safety valve is located on the bottom plate of the battery pack housing.

[0015] A car that includes a battery pack as described above.

[0016] The battery pack provided in this application contains several battery cells inside the battery pack housing. A safety valve is installed on the battery pack housing, and a fireproof component is installed at the valve port of the safety valve. The fireproof component includes a mounting component and a fireproof element that are fixedly connected as one unit. The mounting component is fixedly connected to the battery pack housing, and the fireproof element has a honeycomb thin-walled structure. Thus, in the event of a battery cell malfunction, the safety valve on the battery pack housing opens, allowing flames and smoke to escape from the safety valve. When passing through the safety valve port, the flames will pass through the fireproof element. The honeycomb structure of the fireproof element causes the flames to meander within it, thereby increasing the flame propagation path and reducing the temperature of the flames during propagation. This allows the flames to cool and extinguish as they pass through the fireproof element, resulting in most of the smoke overflowing from the battery pack being flameless smoke, thereby reducing flame overflow from the battery pack and lowering the overall vehicle safety hazard. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application 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 only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a battery pack housing in the prior art;

[0019] Figure 2 This is a schematic diagram of the structure of the fireproof component provided in the embodiments of this application;

[0020] Figure 3 This is a schematic diagram of the structure of the fireproof component in the fireproof assembly provided in the embodiments of this application;

[0021] Figure 4 for Figure 3 A schematic diagram of the honeycomb structure of the fireproof component shown;

[0022] Figure 5 This is a schematic diagram of the battery pack housing provided in an embodiment of this application.

[0023] Explanation of reference numerals in the attached figures:

[0024] 100 - Battery pack housing; 110 - Safety valve;

[0025] 200 - Fireproof component, 210 - Mounting component, 220 - Fireproof component. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The terminology used in the following embodiments is for the purpose of describing specific embodiments only and is not intended to be a limitation of this application. As used in the specification and appended claims of this application, the singular expressions "a," "an," "the," "the," "the," and "this" are intended to also include expressions such as "one or more," unless the context clearly indicates otherwise. It should also be understood that in the embodiments of this application, "one or more" refers to one, two, or more; "and / or" describes the relationship between related objects, indicating that three relationships may exist; for example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0028] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0029] The "multiple" mentioned in the embodiments of this application refers to two or more. It should be noted that in the description of the embodiments of this application, terms such as "first" and "second" are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.

[0030] like Figure 1As shown, in the prior art, when a cell in the battery pack experiences thermal runaway, the flame and smoke from the cell will be discharged through the safety valve 110, causing the flame generated by the cell to overflow, thus posing a safety hazard to the entire vehicle.

[0031] Therefore, this application provides a battery pack that reduces flame leakage from the battery pack and lowers the overall vehicle safety hazard.

[0032] like Figures 2-5 As shown in the embodiment of this application, the battery pack includes a battery housing 100, which contains a plurality of battery cells. The battery housing 100 is equipped with a safety valve 110, and a fireproof component 200 is installed at the valve port of the safety valve 110. The fireproof component 200 includes a mounting component 210 and a fireproof component 220 fixedly connected as one unit. The mounting component 210 is fixedly connected to the battery housing 100, and the fireproof component 220 has a honeycomb thin-walled structure. Thus, in the event of a battery cell failure, the fireproof component 220 on the battery housing 100 will... When safety valve 110 is opened, flames and smoke are discharged from safety valve 110. When passing through the valve port of safety valve 110, the flames pass through fireproof component 220. The honeycomb structure of fireproof component 220 causes the flames to meander through its interior, thereby increasing the flame transmission path and reducing the temperature of the flames during transmission. This allows the flames to cool and extinguish as they pass through fireproof component 220, resulting in most of the smoke overflowing from the battery pack being flameless. This reduces the amount of flame overflow from the battery pack and lowers the overall vehicle safety hazard.

[0033] It should be noted that the safety valve 110 can be located on the side wall of the battery pack housing 100, or the safety valve 110 can be located on the bottom plate of the battery pack housing 100. The choice can be made according to the actual situation, and this application embodiment does not limit this.

[0034] like Figure 5 As shown, the fireproof component 200 is installed on the side of the safety valve 110 near the battery cell, so that the fireproof component is located inside the battery pack housing 100. In the event of thermal runaway of the battery cell, after the safety valve 110 is opened, the flame is first cooled by the fireproof component and then discharged through the valve port of the safety valve 110, thereby reducing the flame overflow of the battery pack.

[0035] like Figures 3-4 As shown, the interior of the fireproof component 220 is a labyrinthine channel to increase the flame transmission path and further reduce the flame temperature during the process of the flame colliding with the channel wall of the labyrinthine channel multiple times, so that the flame cools and extinguishes after passing through the fireproof component 220, reducing flame overflow.

[0036] In this application, the fireproof component 220 is a metal sheet stamping part. The metal sheet is foamed through stamping to form a honeycomb thin-walled structure, thereby increasing the flame transmission path.

[0037] It should be noted that forming a honeycomb structure by stamping is a conventional technique in this field. Honeycomb thin-walled structures can be formed by stretching and stamping the honeycomb core or by direct stamping, which will not be elaborated here.

[0038] In some embodiments, the fireproof component 220 is an aluminum plate stamping part, which has good corrosion resistance and excellent processing performance, can form a good honeycomb structure, and is lightweight, which can reduce the overall weight of the battery pack.

[0039] In some other embodiments, the fireproof component 220 is a copper plate stamping part, which has good thermal conductivity and heat dissipation performance to reduce the flame temperature more quickly, thereby further reducing flame overflow.

[0040] like Figure 2 and Figure 5 As shown, the mounting component 210 has a thin-walled structure and is a metal stamping part. The mounting component 210 is formed by stamping to form a thin-walled structure, and is fixedly connected to the battery pack housing 100 by threaded fasteners, which reduces the space occupied by the fireproof component 200 and improves the integration and compactness of the battery pack.

[0041] like Figure 1 , Figure 2 and Figure 5 As shown, the fireproof component 220 and the valve port of the safety valve 110 are contoured structures, such as round or square valve ports of both the fireproof component 220 and the safety valve 110; and the area of ​​the fireproof component 220 is larger than the area of ​​the valve port of the safety valve 110, so that the fireproof component 220 can cover the valve port of the safety valve 110, so that the flames discharged through the safety valve 110 can pass through the fireproof component 220, thereby further reducing flame overflow.

[0042] The battery pack provided in this application embodiment, by installing a fireproof component 200 at the valve port of the safety valve 110, increases the transmission path of the flame through the honeycomb structure of the fireproof component 220 when the battery cell is out of control, thereby reducing the flame temperature and allowing the flame to cool and extinguish as it passes through the fireproof component 220. This results in the overflow of the battery pack being mostly smoke without open flame, thereby reducing the flame overflow from the battery pack and lowering the safety hazards of the entire vehicle.

[0043] This application also provides a vehicle that includes the battery pack described in the above embodiments.

[0044] Since the battery pack has the aforementioned technical effects, and the vehicle includes the aforementioned battery pack, the vehicle also has the corresponding technical effects, which will not be elaborated here.

[0045] The above description of the embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery pack, characterized in that, include: A battery pack housing (100) contains a plurality of battery cells. The battery pack housing (100) is equipped with a safety valve (110), and a fireproof component (200) is provided at the valve port of the safety valve (110). The fireproof component (200) includes a fixedly connected mounting component (210) and a fireproof component (220). The mounting component (210) is fixedly connected to the battery pack housing (100), and the fireproof component (220) has a honeycomb thin-walled structure.

2. The battery pack according to claim 1, characterized in that, The fireproof component (200) is installed on the side of the safety valve (110) near the battery cell.

3. The battery pack according to claim 1, characterized in that, The fireproof component (220) has a maze-like passage inside.

4. The battery pack according to claim 1, characterized in that, The fireproof component (220) is a metal sheet stamping component.

5. The battery pack according to claim 4, characterized in that, The fireproof component (220) is an aluminum plate stamping or a copper plate stamping.

6. The battery pack according to claim 1, characterized in that, The mounting component (210) has a thin-walled structure and is a metal stamping part. The mounting component (210) is fixedly connected to the battery pack housing (100) by threaded fasteners.

7. The battery pack according to claim 1, characterized in that, The fireproof component (220) and the valve port of the safety valve (110) are contoured structures.

8. The battery pack according to claim 7, characterized in that, The area of ​​the fireproof component (220) is larger than the valve port area of ​​the safety valve (110) so that the fireproof component (220) covers the valve port of the safety valve (110).

9. The battery pack according to claim 1, characterized in that, The safety valve (110) is located on the side wall of the battery pack housing (100); Alternatively, the safety valve (110) is located on the bottom plate of the battery pack housing (100).

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

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