Battery box cover, battery box body and battery pack

Abstract

The utility model discloses a battery box cover, a battery box body and a battery pack, and belongs to the technical field of batteries, the battery box cover comprises a box cover body, the box cover body comprises a box cover top plate and a box cover side plate, and the box cover side plate and the box cover top plate are bent and connected to define a containing cavity; at least part of the box cover top plate is sunken downwards to form at least one groove, so that the containing cavity is divided into at least two sub containing cavities, and the sub containing cavities are formed in the two sides of the groove; one end of the groove extends to the side portion of the box cover body to form a water outlet communicated with the outside, the bottom face of the groove is obliquely arranged to form a flow guide slope face, and the flow guide slope face can guide water in the groove to flow towards the water outlet. The battery box body comprises the battery box cover. The battery pack comprises the battery box body. The groove is formed to increase the outer surface area of the battery box cover, so that the battery box cover can be in full contact with air, and heat dissipation is facilitated; the diversion slope avoids water accumulation of the battery box cover, and corrosion prevention of the battery box cover is facilitated.

Description

Technical Field

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

[0002] A battery pack typically consists of a battery housing and battery modules. The battery housing generally includes a body and a cover, with the cover fixedly connected to the body to form a closed installation space. The battery modules are located within this installation space to protect them. For ease of manufacturing, existing covers are usually rectangular, consisting of a rectangular top plate and side plates vertically positioned around the perimeter of the top plate. This design results in a small external surface area for the rectangular cover, which is not conducive to heat dissipation of the internal battery modules. Utility Model Content

[0003] The purpose of this utility model is to provide a battery box cover, a battery box body, and a battery pack to solve the technical problem in the prior art where the outer surface area of ​​the box cover is small and not conducive to heat dissipation.

[0004] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0005] A battery box cover, comprising:

[0006] The box cover body includes a top plate and a side plate, wherein the side plate and the top plate are bent together to form a receiving cavity.

[0007] At least a portion of the top plate of the box cover is recessed downward to form at least one groove to divide the receiving cavity into at least two sub-receiving cavities, the sub-receiving cavities being disposed on both sides of the groove;

[0008] One end of the groove extends to the side of the box cover body to form a drain outlet that communicates with the outside. The bottom surface of the groove is inclined to form a guide slope, which can guide the water in the groove to flow towards the drain outlet.

[0009] Preferably, the angle of inclination of the guide slope relative to the top plate of the box cover is greater than or equal to 5° and less than or equal to 20°.

[0010] Preferably, the receiving cavity is formed with a height gradient corresponding to the position of the groove, and the electrical receiving cavity is connected to the sub-receiving cavities on both sides of the groove.

[0011] Preferably, the bottom surface of the groove at one end of the drain outlet is flush with the bottom surface of the side plate of the box cover.

[0012] Preferably, the end of the groove away from the drain outlet extends to the side of the box cover body to form a clearance opening communicating with the outside. The groove extends in a straight line from the drain outlet to the clearance opening; or, at least part of the groove extends in a tortuous manner.

[0013] Preferably, the outer surface of the box cover body is provided with a plurality of reinforcing ribs, the extending direction of which is perpendicular to the extending direction of the groove.

[0014] A battery case includes a bottom plate, two side plates, and a battery cover as described above. The side plates are disposed on both sides of the top plate and are sealed to the bottom plate. The two side plates are distributed at the two end openings of the cover body and are sealed to the cover body and the bottom plate.

[0015] Preferably, one of the enclosure side panels has a mounting portion that protrudes outward relative to the battery box cover, the mounting portion being used to arrange a high-voltage plug.

[0016] A battery pack includes at least two battery modules and a battery housing as described above, wherein the battery modules are disposed in the sub-receiving cavity.

[0017] Preferably, a thermal pad is provided on the inner wall of the sub-receiving cavity, and the thermal pad is in contact with the surface of the battery module.

[0018] The beneficial effects of this utility model are:

[0019] The battery box cover proposed in this utility model has at least one recessed groove on the top plate of the cover, which divides the receiving cavity into at least two sub-receiving cavities. The sub-receiving cavities are located on both sides of the groove. The groove increases the outer surface area of ​​the battery box cover, allowing it to fully contact the air and facilitating heat dissipation. One end of the groove extends to the side of the cover body to form a drain outlet that communicates with the outside. The bottom surface of the groove is inclined to form a guide slope, which guides the water in the groove to flow towards the drain outlet, preventing water accumulation in the battery box cover, which is beneficial for corrosion prevention and extending the service life of the battery box cover. Attached Figure Description

[0020] Figure 1 This is a first structural schematic diagram of the battery box cover provided in this embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the second structure of the battery box cover provided in this embodiment of the utility model;

[0022] Figure 3 This is a side view of the battery box cover provided in an embodiment of the present utility model;

[0023] Figure 4 yes Figure 3 Sectional view along axis AA;

[0024] Figure 5 This is a schematic diagram of the battery box structure provided in an embodiment of the present utility model;

[0025] Figure 6 This is a top view of the battery box provided in this embodiment of the utility model;

[0026] Figure 7 yes Figure 6 BB-direction sectional view;

[0027] Figure 8 This is an exploded structural diagram of the battery box provided in an embodiment of the present invention.

[0028] Figure 9 This is a schematic diagram of the battery pack provided in an embodiment of the present invention;

[0029] Figure 10 This is a top view of the battery pack provided in an embodiment of the present utility model;

[0030] Figure 11 yes Figure 10 CC-direction sectional view;

[0031] Figure 12 yes Figure 10 DD section view;

[0032] Figure 13 This is an exploded structural diagram of the battery pack provided in an embodiment of the present invention.

[0033] In the picture:

[0034] X, first direction; Y, second direction; Z, third direction;

[0035] 10. Box cover body; 101. Receiving cavity; 1011. Sub-receiving cavity; 1012. Electrical receiving cavity; 102. Groove; 103. Drain outlet; 104. Guide slope; 105. Clearance opening;

[0036] 11. Top panel of the container lid; 12. Side panel of the container lid; 13. Reinforcing ribs; 14. Flanged edge;

[0037] 20. Box bottom plate;

[0038] 30. Side panel of the enclosure; 31. Front side panel; 311. First notch; 32. Rear side panel; 321. Second notch; 33. Mounting part;

[0039] 100. Battery modules; 200. Electrical components; 300. High-voltage connectors. Detailed Implementation

[0040] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals 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 intended to explain this utility model, and should not be construed as limiting this utility model.

[0041] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0044] See Figures 1 to 4 This embodiment provides a battery box cover, including a cover body 10. The cover body 10 includes a top cover plate 11 and a side cover plate 12. The side cover plate 12 and the top cover plate 11 are bent and connected to form a receiving cavity 101. The angle between the side cover plate 12 and the top cover plate 11 can be set according to actual needs. For example, the angle between the side cover plate 12 and the top cover plate 11 is 90° to 120°. For example, the angle between the side cover plate 12 and the top cover plate 11 is 90°, 100°, 110° or 120°.

[0045] In this embodiment, the side panels 12 of the box cover are disposed on both sides of the top plate 11 of the box cover, such as... Figure 1As shown, the first direction is represented by the X direction, and the lid side plates 12 are disposed on both sides of the lid top plate 11 along the first direction. The included angles between the lid side plates 12 on both sides and the lid top plate 11 can be the same or different. In other embodiments, the lid side plates 12 are disposed on three or four sides of the lid top plate 11.

[0046] The side panel 12 and the top panel 11 of the lid can be integrally formed, facilitating manufacturing. The side panel 12 and the top panel 11 can be detachably connected, facilitating replacement and maintenance. When the side panel 12 and the top panel 11 are integrally formed, the lid body 10 can be a sheet metal part. When the side panel 12 and the top panel 11 are detachably connected, they are sealed together.

[0047] At least a portion of the top plate 11 of the battery case cover is recessed downward to form at least one groove 102, dividing the receiving cavity 101 into at least two sub-receiving cavities 1011, which are located on both sides of the groove 102. The groove 102 increases the outer surface area of ​​the battery case cover, allowing it to fully contact the air and facilitating heat dissipation.

[0048] In some embodiments, the groove 102 is provided and extends along a second direction, the second direction being perpendicular to the first direction, such as... Figure 1 As shown, the second direction is represented by the Y direction. One side of the sub-accommodating cavity 1011 is the box cover side plate 12, and the other side is the wall plate of the groove 102. The top of the sub-accommodating cavity 1011 is the box cover top plate 11.

[0049] The shape of the groove 102 can be set according to actual needs. For example, the groove 102 is rectangular, trapezoidal, U-shaped, or semi-circular. For example, the groove 102 is trapezoidal, and the cross-section of the groove 102 gradually increases along the top-to-bottom direction, thereby forming an inclined groove 102 to facilitate water flow.

[0050] The side panels of the groove 102 are bent and connected to the top plate 11 of the lid. The included angle between them can be set according to actual needs. For example, the included angle between the side panels and the top plate 11 is 90° to 120°. For example, the included angle between the side panels and the top plate 11 is 90°, 100°, 110° or 120°. For example, the cross-sectional area of ​​each sub-accommodating cavity 1011 can be the same or different, and can be set as needed. The included angle between the side panels and the top plate 11 can be the same or different.

[0051] In some embodiments, two grooves 102 are provided. The two grooves 102 can be provided independently or connected to each other. For example, the two grooves 102 extend parallel to each other and are spaced apart along a first direction. Correspondingly, the two grooves 102 divide the receiving cavity 101 into three sub-receiving cavities 1011. The drain outlets 103 of the two grooves 102 can be located on the same side or on different sides. In some embodiments, two grooves 102 are provided, and the two grooves 102 are arranged at an included angle, for example, the two grooves 102 extend perpendicularly. The two grooves 102 can be connected or not connected. In some embodiments, more than two grooves 102 are provided, and the extending direction and length of each groove 102 can be set according to actual needs.

[0052] One end of the groove 102 extends to the side of the cover body 10 to form a drain outlet 103 that communicates with the outside. The bottom surface of the groove 102 is inclined to form a guide slope 104, which guides the water in the groove 102 to flow towards the drain outlet 103. The guide slope 104 can prevent water from accumulating on the battery cover, which is beneficial for the corrosion prevention of the battery cover and extends its service life.

[0053] In some embodiments, each groove 102 has a drain outlet 103, and the guide slope 104 gradually rises in the direction away from the drain outlet 103 to ensure the guiding effect of the guide slope 104 on the water flow. The end of the groove 102 away from the drain outlet 103 can be a closed end or an open end. Figure 1 As shown, the end of the groove 102 away from the drain outlet 103 extends to the side of the cover body 10 to form a clearance opening 105 that communicates with the outside. From the drain outlet 103 to the clearance opening 105, the groove 102 extends in a straight line, which is convenient for processing and production and occupies less space, making it easier to arrange other components in the receiving cavity 101; or, at least part of the groove 102 extends in a tortuous manner to increase the surface area of ​​the groove 102 in contact with the air, which is more conducive to heat dissipation.

[0054] In some embodiments, each groove 102 has two or more drain outlets 103, and the guide slope 104 gradually rises in the direction away from the drain outlets 103 to ensure the guiding effect of the guide slope 104 on the water flow. A high point is formed inside the groove 102, and the guide slope 104 gradually decreases from the high point towards any drain outlet 103. Exemplarily, the groove 102 is high in the middle and low at both ends, and the drain outlets 103 are located at both ends of the groove 102.

[0055] In some embodiments, a portion of the groove 102 has a drain outlet 103, and the guide slope 104 gradually rises in the direction away from the drain outlet 103. One end of the groove 102 away from the drain outlet 103 can be connected to other grooves 102, and the portion of the groove 102 has two drain outlets 103.

[0056] The inclination angle of the guide slope 104 relative to the top plate 11 of the lid is greater than or equal to 5° and less than or equal to 20°, ensuring that the lid body 10 has a large contact area with the air while facilitating the smooth flow of water without excessively encroaching on the space of the receiving cavity 101. In some embodiments, the inclination angle of the guide slope 104 relative to the top plate 11 of the lid is greater than or equal to 10° and less than or equal to 15°. In some embodiments, the inclination angle of the guide slope 104 relative to the top plate 11 of the lid is equal to 5°, 8°, 10°, 12°, 15°, 18°, or 20°.

[0057] Along the length of the guide slope 104, the guide slope 104 is divided into at least two guide sections, which are smoothly connected to each other. The inclination angle of each guide section relative to the top plate 11 of the box cover can be the same or different. For example, in two adjacent guide sections, the inclination angle of the downstream guide section is smaller than that of the upstream guide section. In some embodiments, the guide slope 104 is planar. In some embodiments, the guide slope 104 is stepped.

[0058] The receiving cavity 101 forms an electrical receiving cavity 1012 with a gradually changing height corresponding to the position of the groove 102. The electrical receiving cavity 1012 is connected to the sub-receiving cavities 1011 on both sides of the groove 102. The electrical receiving cavity 1012 is used to accommodate the electrical component 200, making full use of space and ensuring that the installation of the electrical component 200 is not affected while arranging the groove 102, thus ensuring structural compactness. At the same time, the electrical receiving cavity 1012 is connected to the sub-receiving cavities 1011 on both sides of the groove 102, so that the electrical component 200 in the electrical receiving cavity 1012 can be connected to the battery module 100 in the sub-receiving cavity 1011. Specifically, the electrical component 200 and the battery module 100 in the sub-receiving cavity 1011 need to be electrically connected by a wiring harness. The electrical receiving cavity 1012 is connected to the sub-receiving cavities 1011 on both sides of the groove 102 to accommodate the wiring harness arrangement.

[0059] In some embodiments, the bottom surface of the groove 102 at one end of the drain outlet 103 is flush with the bottom surface of the side panel 12 of the lid, ensuring structural strength while accommodating the electrical component 200 and preventing deformation of the lid body 10. In some embodiments, the bottom surface of the groove 102 at one end of the drain outlet 103 is no more than 3 cm higher than the bottom surface of the side panel 12 of the lid to ensure structural strength. Figure 1 As shown, the Z direction represents the third direction, and the first direction, the second direction, and the third direction are perpendicular to each other. Along the third direction, the bottom surface of the groove 102 at one end of the drain outlet 103 is at the same height as the bottom surface of the side plate 12 of the box cover.

[0060] The outer surface of the lid body 10 is provided with multiple reinforcing ribs 13. The extending direction of the reinforcing ribs 13 is perpendicular to the extending direction of the groove 102 to improve structural strength. The number and size of the reinforcing ribs 13 can be set according to actual needs. In this embodiment, the reinforcing ribs 13 extend in a U-shape along the outer wall of the sub-accommodating cavity 1011. The reinforcing ribs 13 and the lid body 10 can be integrally formed, specifically, they can be manufactured by stamping sheet metal. The reinforcing ribs 13 protrude from the outer surface of the lid body 10, and the cross-sectional shape of the reinforcing ribs 13 can be arc-shaped, rectangular, or other shapes.

[0061] See Figures 5 to 8 This embodiment also provides a battery box, including a box bottom plate 20, two box side plates 30 and the aforementioned battery box cover. The box cover side plates 12 are disposed on both sides of the box cover top plate 11 and are sealed to the box bottom plate 20. The two box side plates 30 are distributed at the two end openings of the box cover body 10 and are sealed to the box cover body 10 and the box bottom plate 20.

[0062] The side panels 12 of the cover are located on both sides of the top plate 11 of the cover, and the side panels 12 and the top plate 11 of the cover are bent and connected to form a receiving cavity 101. Therefore, the two ends of the receiving cavity 101 have openings. When the battery box cover is fastened on the bottom plate 20 of the box, the openings are blocked by the two side panels 30 of the box. The bottom plate 20 of the box, the side panels 30 of the box and the battery box cover are sealed together, so that the receiving cavity 101 forms a closed cavity.

[0063] A flange 14 is provided on the side of the lid side panel 12 away from the lid top panel 11, and the flange 14 extends away from the sub-receiving cavity 1011. When the lid side panel 12 is connected to the box body bottom plate 20, the flange 14 is connected to the box body bottom plate 20, which can be by adhesive, snap-fit, or bolt connection. To ensure sealing, a sealing gasket can be provided between the flange 14 and the box body bottom plate 20. For example, the flange 14 extends parallel to the box body bottom plate 20 to increase the contact area with the box body bottom plate 20 and ensure connection stability.

[0064] Specifically, the two side panels 30 of the box body are a front side panel 31 and a rear side panel 32. The front side panel 31 is located at the front opening of the box cover body 10 and is sealed to the box cover body 10 and the box bottom plate 20. The rear side panel 32 is located at the rear opening of the box cover body 10 and is sealed to the box cover body 10 and the box bottom plate 20.

[0065] For example, a sealing ring is provided circumferentially at the inner edge of the front side panel 31, and the sealing ring is arranged in a ring around the front side panel 31. A sealing ring is provided circumferentially at the inner edge of the rear side panel 32, and the sealing ring is arranged in a ring around the rear side panel 32. Both sealing rings can be integrally formed to further improve the sealing performance.

[0066] The shape of the side panel 30 of the box body is set according to the shape of the end opening of the box lid body 10. The sealing ring conforms to the shape of the side panel 30 of the box body so that the edges of the side panel 30 of the box body can be sealed. The groove 102 makes the openings at both ends of the receiving cavity 101 irregularly shaped, similar to a U-shape. In this embodiment, the clearance opening 105 is set on the same side as the front side panel 31, and the drain outlet 103 is set on the same side as the rear side panel 32. A first notch 311 is provided on the front side panel 31 at the position corresponding to the clearance opening 105, and a second notch 321 is provided on the rear side panel 32 at the position corresponding to the drain outlet 103.

[0067] One of the side panels 30 of the enclosure has a mounting portion 33 that protrudes outward relative to the battery compartment cover. The mounting portion 33 is used to accommodate the high-voltage plug 300. By protruding the mounting portion 33 outward, sufficient installation space is provided to facilitate the installation of the high-voltage plug 300 and prevent interference. Specifically, the front side panel 31 has a mounting portion 33 that protrudes outward relative to the battery compartment cover, and the rear side panel 32 is flat.

[0068] See Figures 9 to 13 This embodiment also provides a battery pack, including at least two battery modules 100 and the aforementioned battery housing, with the battery modules 100 disposed in sub-receiving cavities 1011. Each sub-receiving cavity 1011 may contain one battery module 100, or two or more battery modules 100. When two battery modules 100 are disposed in one sub-receiving cavity 1011, the two battery modules 100 may be arranged along a first direction or along a second direction.

[0069] In this embodiment, a portion of the top plate 11 of the cover is recessed downwards to form a groove 102, dividing the receiving cavity 101 into two sub-receiving cavities 1011. The sub-receiving cavities 1011 are disposed on both sides of the groove 102. One sub-receiving cavity 1011 contains one row of battery modules 100, and the other sub-receiving cavity 1011 contains two rows of battery modules 100. The two rows of battery modules 100 are arranged along a first direction. Each row of battery modules 100 may include multiple battery modules 100.

[0070] The cavity 101 forms an electrical cavity 1012 with a gradually changing height at the position corresponding to the groove 102. The electrical cavity 1012 is connected to the sub-cavities 1011 on both sides of the groove 102. The electrical cavity 1012 contains an electrical component 200.

[0071] The battery module 100 includes multiple battery cells stacked along a first direction. The multiple battery cells are connected in series and / or in parallel. The battery pack also includes a high-voltage connector 300, which is disposed on the mounting portion 33 of the front panel 31.

[0072] A thermally conductive pad is provided on the inner wall of the sub-receiving cavity 1011, and the thermally conductive pad is in contact with the surface of the battery module 100. During use, the heat generated by the battery module 100 is transferred to the cover body 10 through the thermally conductive pad. Since the outer wall of the cover body 10 is in full contact with the air, it can exchange heat with the air, which is beneficial to the heat dissipation of the battery module 100.

[0073] The shape of the thermal pad conforms to the inner wall of the sub-receiving cavity 1011, ensuring full contact between the thermal pad and the inner wall of the sub-receiving cavity 1011 and guaranteeing heat transfer efficiency. The thermal pad can be made of existing thermally conductive materials, such as silicone-based thermal pads, which can improve heat dissipation while also providing structural cushioning. Even if the cover body 10 is deformed by external impact, the thermal pad can still protect the battery module 100.

[0074] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. 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. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A battery box cover, characterized in that, include: The box cover body (10) includes a box cover top plate (11) and a box cover side plate (12), wherein the box cover side plate (12) and the box cover top plate (11) are bent and connected to form a receiving cavity (101); At least a portion of the top plate (11) of the box cover is recessed downward to form at least one groove (102) to divide the receiving cavity (101) into at least two sub-receiving cavities (1011), the sub-receiving cavities (1011) being disposed on both sides of the groove (102); One end of the groove (102) extends to the side of the box cover body (10) to form a drain outlet (103) that communicates with the outside. The bottom surface of the groove (102) is inclined to form a guide slope (104), which can guide the water in the groove (102) to flow to the drain outlet (103).

2. The battery box cover according to claim 1, characterized in that, The angle of inclination of the guide slope (104) relative to the top plate of the box cover (11) is greater than or equal to 5° and less than or equal to 20°.

3. The battery box cover according to claim 1, characterized in that, The receiving cavity (101) forms an electrical receiving cavity (1012) with a gradually changing height corresponding to the position of the groove (102). The electrical receiving cavity (1012) is connected to the sub-receiving cavities (1011) on both sides of the groove (102).

4. The battery box cover according to claim 3, characterized in that, The bottom surface of the groove (102) at one end of the drain outlet (103) is flush with the bottom surface of the side plate (12) of the box cover.

5. The battery box cover according to claim 1, characterized in that, The groove (102) extends from the end away from the drain outlet (103) to the side of the box cover body (10) to form a clearance opening (105) communicating with the outside. The groove (102) extends in a straight line from the drain outlet (103) to the clearance opening (105); or, at least part of the groove (102) extends in a tortuous manner.

6. The battery box cover according to any one of claims 1-5, characterized in that, The outer surface of the box cover body (10) is provided with a plurality of reinforcing ribs (13), and the extending direction of the reinforcing ribs (13) is perpendicular to the extending direction of the groove (102).

7. A battery housing, characterized in that, The battery case includes a bottom plate (20), two side plates (30), and a battery case cover as described in any one of claims 1-6. The side plates (12) are disposed on both sides of the top plate (11) and are sealed to the bottom plate (20). The two side plates (30) are distributed at the two ends of the opening of the cover body (10) and are sealed to the cover body (10) and the bottom plate (20).

8. The battery housing according to claim 7, characterized in that, One of the enclosure side panels (30) has a mounting portion (33) that protrudes outward relative to the battery box cover, the mounting portion (33) being used to arrange a high-voltage plug (300).

9. A battery pack, characterized in that, It includes at least two battery modules (100) and a battery housing as described in claim 7 or 8, wherein the battery modules (100) are disposed in the sub-receiving cavity (1011).

10. The battery pack according to claim 9, characterized in that, A thermal pad is provided on the inner wall of the sub-receiving cavity (1011), and the thermal pad is in contact with the surface of the battery module (100).

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