Battery pack shell and battery pack

Abstract

The battery pack shell comprises a shell body, an installation frame used for containing the battery pack is fixed to the upper portion in the shell body, a heat preservation cavity is formed in the position, below the installation frame, in the shell body, a plurality of second ventilation openings are formed in the bottom end of the installation frame, and a plurality of first ventilation openings communicated with the heat preservation cavity are formed in the bottom end of the shell body. A plurality of cover plates which can be opened or closed and are in one-to-one correspondence with the first ventilation openings are further arranged in the heat preservation cavity. Therefore, when the air temperature is high, the first ventilation opening is opened to facilitate air flow in the mounting frame so as to accelerate heat dissipation of the battery pack; when the air temperature is low, the cover plate closes the first ventilation opening to reduce air flow, so that the heat preservation effect is achieved, the use safety of the battery pack is improved, meanwhile, leaked liquid can be conveniently discharged when the battery pack accidentally leaks liquid, and the safety is further improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery pack shell and a battery pack. Background Technology

[0002] A battery pack is a battery module composed of multiple individual battery cells, typically encased in a casing. It is commonly used in energy storage systems, electric vehicles, portable devices, or other applications requiring large-capacity energy storage. It can provide rechargeable electrical energy and release energy when needed to power electrical equipment.

[0003] Existing battery pack casings are typically fixed as a single unit during use. When dissipating heat, the casing is in direct contact with the outside air. However, this is not effective at high temperatures and can lead to rapid heat loss at low temperatures, affecting the battery pack's efficiency. Furthermore, accidental leakage of the battery cells poses a safety hazard. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model proposes a battery pack shell and a battery pack.

[0005] The present invention discloses a battery pack shell and a battery pack, including a shell 1, a mounting bracket 2 for accommodating the battery pack fixed in the upper part of the shell 1, a heat insulation cavity 4 located below the mounting bracket 2 in the shell 1, a plurality of second ventilation openings 6 opened at the bottom end of the mounting bracket 2, a plurality of first ventilation openings 5 ​​opened at the bottom end of the shell 1 and communicating with the heat insulation cavity 4, and a plurality of cover plates 10 that can be opened or closed and correspond one-to-one with the first ventilation openings 5 ​​are also provided in the heat insulation cavity 4.

[0006] When the temperature is high, the first vent is opened to facilitate airflow within the mounting bracket, thereby accelerating heat dissipation from the battery pack. When the temperature is low, the cover closes the first vent to reduce airflow and provide insulation, improving the safety of the battery pack during use. Simultaneously, it facilitates drainage in the event of accidental leakage, further enhancing safety.

[0007] Preferably, the insulation cavity 4 is further provided with a driving mechanism for driving a plurality of cover plates 10. The driving mechanism includes an electric telescopic rod 7 fixed to the bottom of the inner wall of the insulation cavity 4. A push rod 8 is fixedly installed at the telescopic end of the electric telescopic rod 7. A plurality of connecting rods 9 perpendicular to the push rod 8 are provided on the push rod 8. A plurality of cover plates 10 are fixed on the connecting rods 9. When the electric telescopic rod 7 is activated, the push rod 8 is driven to move back and forth along its length direction, thereby driving the connecting rods 9 to move and driving the plurality of cover plates 10 to open or close the first ventilation opening 5.

[0008] Preferably, the bottom of the inner wall of the heat insulation cavity 4 is provided with a plurality of guide grooves 12 corresponding to the position of the first vent 5, one end of the cover plate 10 is slidably engaged in the guide grooves 12, and the depth of the guide grooves 12 is less than the depth of the first vent 5.

[0009] The guide groove 12 facilitates the movement of the cover plate 10 along the first ventilation opening 5, improving the stability of the cover plate 10 during movement and ensuring the closure of the first ventilation opening 5.

[0010] Preferably, one end of the push rod 8 is fixedly connected to a closing plate 13, and the outer wall of the closing plate 13 is covered with a rubber layer.

[0011] When the push rod 8, driven by the electric telescopic rod 7, drives the closing plate 13 to close the insulation cavity 4, it can improve the fit between the push rod 8 and the insulation cavity 4, thereby improving the insulation and sealing effects.

[0012] Preferably, one end of the housing 1 is further provided with a plurality of sealing plates 14.

[0013] The sealing plate 14 facilitates closure with several openings on the mounting bracket 2 via screw assembly.

[0014] This utility model also proposes a battery pack, which is placed inside the battery pack shell as described in any of the above claims, characterized in that it includes a plurality of battery cell modules 3, and the plurality of battery cell modules 3 are placed inside the mounting frame 2.

[0015] In summary, this utility model has the following beneficial effects: Several second ventilation openings are provided at the bottom of the mounting frame for installing the battery pack, and a heat-insulating cavity is provided inside the housing below the mounting frame, allowing the mounting frame and the heat-insulating cavity to remain connected. Several cover plates installed inside the heat-insulating cavity can open or close the first ventilation openings to control their opening or closing. This facilitates opening the first ventilation openings when the temperature is high, allowing airflow inside the mounting frame to accelerate heat dissipation from the battery pack; when the temperature is low, the cover plates close the first ventilation openings to reduce airflow and achieve a heat-insulating effect, improving the safety of the battery pack during use. Simultaneously, it facilitates the drainage of leaked liquid in case of accidental leakage from the battery pack, further enhancing safety.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] Figure 1 This is a perspective view of the battery pack outer shell structure according to an embodiment of the present utility model;

[0018] Figure 2This is a schematic diagram of the bottom of the battery pack casing according to an embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of the interior of the housing according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the interior of the insulation cavity in an embodiment of the present invention;

[0021] Figure 5 for Figure 4 Enlarged diagram of point A in the middle.

[0022] In the picture:

[0023] 1. Housing; 2. Mounting bracket; 3. Battery cell module; 4. Insulation cavity; 5. First vent; 6. Second vent; 7. Electric telescopic rod; 8. Push rod; 9. Connecting rod; 10. Cover plate; 11. Spring; 12. Guide groove; 13. Closing plate; 14. Sealing plate. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] like Figure 1-5 As shown, the battery pack housing proposed in this embodiment includes a housing 1. A mounting bracket 2 for accommodating the battery pack is fixed in the upper part of the housing 1. A heat insulation cavity 4 is provided in the housing 1 below the mounting bracket 2. A plurality of second ventilation openings 6 are provided at the bottom end of the mounting bracket 2. A plurality of first ventilation openings 5 ​​are provided at the bottom end of the housing 1 and are connected to the heat insulation cavity 4. A plurality of cover plates 10 that can be opened or closed and correspond one-to-one with the first ventilation openings 5 ​​are also provided in the heat insulation cavity 4.

[0026] Thus, several second ventilation openings 6 are provided at the bottom of the mounting frame 2 for installing the battery pack, and a heat insulation cavity 4 is provided in the housing 1 below the mounting frame 2, so that the mounting frame 2 and the heat insulation cavity 4 can be kept in communication. Several cover plates 10 provided in the heat insulation cavity 4 can open or close the first ventilation openings 5 ​​to control the opening or closing of the first ventilation openings 5. When the temperature is high, the first ventilation openings 5 ​​can be opened to facilitate airflow inside the mounting frame 2 to accelerate the heat dissipation of the battery pack. When the temperature is low, the cover plates 10 can close the first ventilation openings 5 ​​to reduce airflow and achieve a heat insulation effect, thereby improving the safety of the battery pack during use. At the same time, it can also facilitate the discharge of leaked liquid in case of accidental leakage of the battery pack, further improving safety.

[0027] Furthermore, the insulation cavity 4 is also equipped with a drive mechanism for driving several cover plates 10. The drive mechanism includes an electric telescopic rod 7 fixed to the bottom of the inner wall of the insulation cavity 4. A push rod 8 is fixedly installed at the telescopic end of the electric telescopic rod 7. Several connecting rods 9 are provided on the push rod 8 perpendicular to it. Several cover plates 10 are fixed on the connecting rods 9. When the electric telescopic rod 7 is activated, the push rod 8 is driven to move back and forth along its length, which in turn drives the connecting rods 9 to move, thereby driving several cover plates 10 to open or close the first ventilation opening 5.

[0028] Furthermore, such as Figure 4 and Figure 5 As shown, the bottom of the inner wall of the insulation cavity 4 is provided with several guide grooves 12 corresponding to the positions of the first ventilation opening 5. One end of the cover plate 10 is slidably engaged in the guide groove 12, and the depth of the guide groove 12 is less than the depth of the first ventilation opening 5. The guide grooves 12 facilitate the movement of the cover plate 10 along the first ventilation opening 5, improve the stability of the cover plate 10 during movement, and ensure the closure and shielding of the first ventilation opening 5.

[0029] Preferably, the outer wall of the cover plate 10 is covered with a rubber layer, which can fit tightly against its inner wall when the first vent 5 is closed, maintaining a good sealing effect without affecting the implementation of the technical solution in this embodiment; and at least one spring 11 is fixedly connected to one end of the cover plate 10 that is slidably engaged in the guide groove 12. The spring 11 provides an elastic buffer effect at one end of the cover plate 10 when it moves, preventing the cover plate 10 from moving excessively and causing damage.

[0030] Among them, such as Figure 1 As shown, one end of the push rod 8 is fixedly connected to the closing plate 13, and the outer wall of the closing plate 13 is covered with a rubber layer. This allows the push rod 8 to improve its fit with the insulation cavity 4 when it drives the closing plate 13 to close the insulation cavity 4 under the drive of the electric telescopic rod 7, thereby improving the insulation and sealing effects.

[0031] In this embodiment, as Figure 4 As shown, a plurality of sealing plates 14 are provided at one end of the housing 1. The sealing plates 14 are convenient to be closed with a plurality of openings on the mounting bracket 2 by means of screw assembly. The outer wall of the sealing plate 14 is covered with a rubber layer, which can make the connection between the housing body 1, the mounting bracket 2 and the sealing plate 14 tight and maintain good sealing performance, so as to seal the battery pack.

[0032] In summary, during use, when the battery pack needs heat dissipation due to high temperatures, activating the electric telescopic rod 7 drives the connecting rod 9 connected to the push rod 8 to move outward, thereby causing several cover plates 10 to move synchronously and open the first vent 5. This allows the interior of the mounting frame 2 to connect with the outside through the second vent 6 and the insulation cavity 4, facilitating the entry of outside air to improve heat dissipation. In the event of accidental leakage from the battery cell module 3 in the mounting frame 2, the leakage is directly discharged through the second vent 6 and the first vent 5, reducing safety hazards. Secondly, when the temperature is low, similarly, activating the electric telescopic rod 7 drives several cover plates 10 to move synchronously and reset, closing the first vent 5. The closing plate 13 then closes the insulation cavity 4, reducing airflow and improving the insulation effect on the battery pack.

[0033] This embodiment also proposes a battery pack, placed inside the battery pack casing described in any of the above embodiments, comprising a plurality of cell modules 3, which are placed within a mounting bracket 2. The derivation process of this beneficial effect is largely similar to the derivation process of the beneficial effect brought by the battery pack casing described above, so it will not be repeated here.

[0034] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A battery pack housing, comprising a housing (1), wherein a mounting bracket (2) for accommodating the battery pack is fixed in the upper part of the housing (1), characterized in that, The housing (1) is provided with a heat insulation cavity (4) located below the mounting bracket (2). The bottom end of the mounting bracket (2) is provided with several second ventilation openings (6). The bottom end of the housing (1) is provided with several first ventilation openings (5) that are connected to the heat insulation cavity (4). The heat insulation cavity (4) is also provided with several cover plates (10) that can be opened or closed and correspond one-to-one with the first ventilation openings (5).

2. The battery pack casing according to claim 1, characterized in that, The insulation cavity (4) is also provided with a driving mechanism for driving a number of cover plates (10). The driving mechanism includes an electric telescopic rod (7) fixed to the bottom of the inner wall of the insulation cavity (4). A push rod (8) is fixedly installed at the telescopic end of the electric telescopic rod (7). A number of connecting rods (9) perpendicular to the push rod (8) are provided on the push rod (8). A number of cover plates (10) are fixed on the connecting rods (9). When the electric telescopic rod (7) is started, the push rod (8) is driven to move back and forth along its length direction, thereby driving the connecting rods (9) to move and driving the cover plates (10) to open or close the first ventilation opening (5).

3. The battery pack casing according to claim 2, characterized in that, The bottom of the inner wall of the heat insulation cavity (4) is provided with a plurality of guide grooves (12) corresponding to the position of the first vent (5). One end of the cover plate (10) is slidably engaged in the guide groove (12), and the depth of the guide groove (12) is less than the depth of the first vent (5).

4. The battery pack casing according to claim 2, characterized in that, One end of the push rod (8) is fixedly connected to a closing plate (13), and the outer wall of the closing plate (13) is covered with a rubber layer.

5. The battery pack casing according to claim 1, characterized in that, The shell (1) is also provided with several sealing plates (14) at one end.

6. A battery pack, disposed within a battery pack housing as described in any one of claims 1-5, characterized in that, It includes several battery cell modules (3), and several of the battery cell modules (3) are placed in the mounting frame (2).

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