Sealing cover, battery pack shell, battery pack and electric equipment

Abstract

The utility model relates to a sealing cover, battery pack shell, battery pack and electric equipment, the sealing cover comprises a sealing cover body, a pressure plate and an access hole cover, the sealing cover body is provided with an access hole, the pressure plate surrounds the access hole and is connected with the inner side surface of the sealing cover body, and the access hole cover is connected with the pressure plate. And the access hole cover covers the access hole and is arranged on the outer side surface of the sealing cover body, and the access hole cover can close or open the access hole. Therefore, the strength of the edge of the access port cover is enhanced through the pressing plate. After being impacted by high temperature and / or low temperature, the edge position of the access hole is not easy to deform or crack or crack, so that the air tightness failure of the battery pack sealing cover is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and relates to a sealing cover, a battery pack housing, a battery pack and an electrical equipment. Background Art

[0002] In the related art, a battery pack sealing cover is provided with an inspection port and an inspection port cover, and the inspection port cover is directly and sealingly connected to the inspection port.

[0003] However, for the battery pack sealing cover in the related art, after being impacted by high temperature and / or low temperature, the edge position of the inspection port is prone to deformation, or gaps or cracks are generated, thereby causing the airtightness of the battery pack sealing cover to fail. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is: aiming at the problem that for the battery pack sealing cover in the related art, the edge position of the inspection port is prone to deformation, or gaps or cracks are generated, thereby causing the airtightness of the battery pack sealing cover to fail, a sealing cover, a battery pack housing, a battery pack and an electrical equipment are provided.

[0005] To solve the above technical problem, on the one hand, the utility model provides a sealing cover, which includes a sealing cover body, a pressing plate and an inspection port cover. An inspection port is provided on the sealing cover body. The pressing plate surrounds the inspection port and is connected to the inner surface of the sealing cover body. The inspection port cover covers the inspection port and is arranged on the outer surface of the sealing cover body, and the inspection port cover can close or open the inspection port.

[0006] According to the sealing cover of the embodiment of the utility model, a pressing plate is added. The pressing plate surrounds the inspection port and is fixed to the inner surface of the sealing cover body. The inspection port cover covers the inspection port and is arranged on the outer surface of the sealing cover body. In this way, the strength of the edge of the inspection port is enhanced by the pressing plate. After being impacted by high temperature and / or low temperature, the edge position of the inspection port is not prone to deformation, or gaps or cracks are generated, avoiding the failure of the airtightness of the sealing cover at the inspection port.

[0007] Optionally, the pressing plate includes a pressing plate body surrounding the inspection port in a circle and a plurality of connecting pieces connected to the surface of the pressing plate body facing away from the sealing cover body. The plurality of connecting pieces are arranged at intervals around the inspection port;

[0008] The sealing cover further includes a plurality of fastening pieces corresponding to the plurality of connecting pieces one by one. Each fastening piece is detachably connected to the corresponding connecting piece to detachably connect the pressing plate and the inspection port cover.

[0009] Optionally, the connecting piece is a blind hole nut, and the fastening piece is a bolt;

[0010] A plurality of mounting holes are provided on the inspection port cover, and the plurality of mounting holes are arranged in one-to-one correspondence with the plurality of blind hole nuts; a plurality of through holes are provided on the pressing plate body, and the plurality of through holes are arranged in one-to-one correspondence with the plurality of blind hole nuts;

[0011] Each bolt passes through the corresponding mounting hole and through hole and is threadedly connected to the internal threaded hole of the corresponding blind hole nut.

[0012] Optionally, the pressing plate body includes a pressing plate main board and a plurality of bosses that are fixedly connected or integrally formed. The plurality of bosses are arranged in one-to-one correspondence with the plurality of blind hole nuts. The boss has an inner hole penetrating the pressing plate body, and the inner hole of the boss is the through hole;

[0013] A plurality of through holes are provided on the sealing cover body around the inspection port. Each boss penetrates through the corresponding through hole and protrudes from the outer surface of the sealing cover body, and the pressing plate main board is attached to the inner surface of the sealing cover body.

[0014] Optionally, the boss is cylindrical.

[0015] Optionally, the thickness of the pressing plate main board is 0.6 - 1.5 mm.

[0016] Optionally, the blind hole nut is press-fitted and welded to the pressing plate body.

[0017] Optionally, a sealing member is clamped between the inspection port cover and the sealing cover body, and the sealing member is arranged around the inspection port.

[0018] Optionally, the sealing member is sealing cotton, and the thickness of the compressed sealing cotton is 1.5 - 5 mm.

[0019] Optionally, the sealing cover body is a composite material part;

[0020] The sealing cover body and the pressing plate are fixedly connected by molding or hot pressing.

[0021] Optionally, the sealing cover body includes a top plate and a side wall. The side wall is arranged around at least part of the perimeter of the top plate to enclose a cavity for accommodating at least part of the battery pack, and the inspection port is provided on the top plate;

[0022] The sealing cover body is generally rectangular. The position where each corner of the top plate meets the corresponding corner of the side wall is a corner thickening area, and the area of the top plate except the corner thickening area is a non-thickening area. The thickness of the corner thickening area is greater than the thickness of the non-thickening area.

[0023] Optionally, the sealing cover body further includes a sealing extension portion that extends away from the cavity and is connected to at least a part of the peripheral edge of the top plate or at least a part of the side wall; the thickness of the sealing extension portion is greater than the thickness of the non-thickened area.

[0024] Optionally, the thickness of the corner thickened area is 1.8 - 2.5 mm;

[0025] And / or,

[0026] The ratio of the thickness of the sealing extension portion to the thickness of the non-thickened area is 1.5 - 2.5.

[0027] On the other hand, an embodiment of the present invention further provides a battery pack housing, including a tray and the above-mentioned sealing cover, and the sealing cover body is covered on the opening of the tray to enclose a receiving space for receiving a battery pack.

[0028] The battery pack housing provided by the embodiment of the present invention has all the advantages of the above-mentioned sealing cover.

[0029] On yet another aspect, an embodiment of the present invention further provides a battery pack, including a battery pack and the above-mentioned battery pack housing, and the battery pack is disposed in the receiving space.

[0030] The battery pack provided by the embodiment of the present invention has all the advantages of the above-mentioned sealing cover.

[0031] On yet another aspect, an embodiment of the present invention further provides an electrical device, including the above-mentioned battery pack.

[0032] The electrical device provided by the embodiment of the present invention has all the advantages of the above-mentioned sealing cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic diagram of a sealing cover provided by an embodiment of the present invention;

[0034] Figure 2 is an exploded view of a sealing cover provided by an embodiment of the present invention;

[0035] Figure 3 is a schematic diagram of a pressing plate of a sealing cover provided by an embodiment of the present invention;

[0036] Figure 4 is an exploded view of a pressing plate of a sealing cover provided by an embodiment of the present invention;

[0037] Figure 5 is a bottom view of a sealing cover provided by an embodiment of the present invention;

[0038] Figure 6 is alongFigure 5 Cross-sectional view in the A-A direction in

[0039] Figure 7 is Figure 6 Enlarged view at position a in

[0040] Figure 8 is along Figure 5 Cross-sectional view in the B-B direction in

[0041] Figure 9 is Figure 8 Enlarged view at position b in

[0042] The reference numerals in the specification are as follows:

[0043] 10. Sealing cover;

[0044] 1. Sealing cover body; 11. Maintenance opening; 12. Top plate; 13. Side wall panel; 14. Sealing flange; 15. Corner thickened area; 16. Non-thickened area; 2. Pressure plate; 21. Pressure plate body; 211. Pressure plate main board; 212. Boss; 2121. Through hole; 22. Blind hole nut; 3. Maintenance opening cover; 31. Mounting hole; 4. Sealing element; 41. Hole. Specific implementation mode

[0045] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0046] See Figures 1 to 9 , a sealing cover 10 provided by an embodiment of the present utility model includes a sealing cover body 1, a pressure plate 2 and a maintenance opening cover 3. A maintenance opening 11 is provided on the sealing cover body 1. The pressure plate 2 is fixed around the maintenance opening 11 on the inner surface of the sealing cover body 1. The maintenance opening cover 3 covers the maintenance opening 11 and is arranged on the outer surface of the sealing cover body 1. The maintenance opening cover 3 can close or open the maintenance opening 11.

[0047] For the sealing cover 10 according to the embodiment of the present utility model, the pressure plate 2 is added. The pressure plate 2 is fixed around the maintenance opening 11 on the inner surface of the sealing cover body 1. The maintenance opening cover 3 is arranged around the maintenance opening 11 on the outer surface of the sealing cover body 1. In this way, the strength of the edge of the maintenance opening 11 is enhanced by the pressure plate 2. After being impacted by high temperature and / or low temperature, the edge position of the maintenance opening 11 is not easy to deform or have gaps or cracks, avoiding the airtightness failure of the sealing cover 10 at the maintenance opening 11.

[0048] In one embodiment, the pressing plate 2 includes a pressing plate body 21 surrounding the inspection opening 11 in a circle and a plurality of connecting members connected to a surface of the pressing plate body 21 facing away from the sealing cover body 1, and the plurality of connecting members are arranged at intervals around the inspection opening 11; the sealing cover 1 further includes a plurality of fastening members corresponding to the plurality of connecting members one by one, and each fastening member is detachably connected to the corresponding connecting member to detachably connect the pressing plate 2 and the inspection opening cover 3.

[0049] In one embodiment, referring to Figure 3 and Figure 4 , the connecting member is a blind hole nut 22, and the fastening member is a bolt; a plurality of mounting holes 31 are provided on the inspection opening cover 3, and the plurality of mounting holes 31 are arranged corresponding to the plurality of blind hole nuts 22 one by one; a plurality of through holes 2121 are provided on the pressing plate body 21, and the plurality of through holes 2121 are arranged corresponding to the plurality of blind hole nuts 22 one by one; each bolt passes through the corresponding mounting hole 31 and through hole 2121 and is threadedly connected to the internal thread hole of the corresponding blind hole nut 22 to detachably connect the pressing plate 2 and the inspection opening cover 3.

[0050] In other embodiments, the connecting member can also be a threaded hole, and the fastening member is a screw.

[0051] In other embodiments, the connecting member can also be a bayonet, and the fastening member is a snap.

[0052] In one embodiment, referring to Figure 3 and Figure 4 , the pressing plate body 21 is a square ring structure.

[0053] In one embodiment, referring to Figure 3 , Figure 4 and Figure 9 , the pressing plate body 21 includes an integrally formed pressing plate main board 211 and a plurality of bosses 212, the plurality of bosses 212 are arranged corresponding to the plurality of blind hole nuts 22 one by one, the boss 212 has an inner hole penetrating the pressing plate body 21, and the inner hole of the boss 212 is the through hole 2121; a plurality of through holes (not shown in the figure) are provided on the sealing cover body 1 around the inspection opening 11, and each boss 212 passes through the corresponding through hole and protrudes from the outer surface of the sealing cover body 1, and the pressing plate main board 211 is attached to the inner surface of the sealing cover body 1.

[0054] The integrally formed pressing plate body 21 can reduce costs and reduce processing procedures.

[0055] However, in other embodiments, the pressing plate main board 211 and the plurality of bosses 212 can also be formed separately and fixed together by welding, gluing, etc.

[0056] In one embodiment, the boss 212 is cylindrical.

[0057] In one embodiment, the blind hole nut 22 is press-fitted and welded to the pressing plate body 21. That is, when welding the blind hole nut 22 and the pressing plate body 21, pressure is applied to ensure the sealing performance of the welding surface between the blind hole nut 22 and the pressing plate body 21. In this way, sealing is achieved at the blind hole nut 22, and external liquids and the like cannot enter the battery pack through the inner hole (i.e., the through hole 2121) of the boss 212.

[0058] In one embodiment, the thickness of the main pressing plate 211 is 0.6 - 1.5 mm, for example, 0.8 mm. This ensures the appropriate strength of the main pressing plate 211, meets the thickness requirements for welding with the blind hole nut 22, and avoids welding through.

[0059] In one embodiment, see Figure 2 and Figure 9 , a sealing member 4 is clamped between the inspection port cover 3 and the sealing cover body 1, and the sealing member 4 is disposed around the inspection port 11. The sealing member 4 is in a square ring shape, and a hole 41 for the bolt to pass through is provided on the sealing member 4. The sealing member 4 is used to seal the gap between the inspection port cover 3 and the cover body 1, preventing external liquids and the like from flowing into the battery pack through the gap between the inspection port cover 3 and the cover body 1.

[0060] In one embodiment, the sealing member 4 is sealing cotton, and the compressed thickness of the sealing cotton 4 is 1.5 - 5 mm. Without sacrificing the sealing performance, the thickness should not be too large. For example, 2 - 3 mm.

[0061] In one embodiment, see Figure 2 , the sealing cover body 1 is rectangular, and the inspection port 11 is disposed at one end in the length direction of the sealing cover body 1.

[0062] In one embodiment, see Figure 2 , the inspection port 11 is rectangular, and the inspection port cover 3 is rectangular.

[0063] However, in other embodiments, the inspection port 11 can also be a regular shape such as circular, oval, triangular, pentagonal, hexagonal, etc., or an irregular shape. The shapes of the inspection port cover 3 and the pressing plate body 21 match the shape of the inspection port 11.

[0064] In one embodiment, the sealing cover body 1 can be PCM (Phase Change Material), SMC (Sheet molding compound), PP (Polypropylene), or PP glass fiber composite material.

[0065] In a preferred embodiment, the sealing cover body 1 is a composite material, for example, a composite material such as PP glass fiber, a carbon fiber composite material, etc.

[0066] In one embodiment, the pressing plate body 21 is made of a steel plate, and the blind hole nut 22 is made of steel.

[0067] In one embodiment, the inspection cover 3 may be made of steel, aluminum or a composite material.

[0068] In one embodiment, the sealing cover body 1 and the pressing plate 2 are fixedly connected by molding or hot pressing. The specific molding method is to place the pressing plate 2 in a mold, inject molten raw materials, and mold the sealing cover body 1 in the mold. After molding, the sealing cover body 1 and the pressing plate 2 are tightly combined, and then taken out to obtain a combination of the sealing cover body 1 and the pressing plate 2.

[0069] In one embodiment, see Figure 1 , Figure 2 and Figure 7 The sealing cover body 1 includes a top plate 12 and a side panel 13 . The side panel 13 is arranged around at least a portion of the circumference of the top plate 12 to enclose a cavity, and the cavity is used to accommodate at least a portion of the battery pack. The inspection port 11 is arranged on the top plate 12 .

[0070] The sealing cover body 1 is roughly rectangular, and the position where each corner of the top plate 12 meets the corner corresponding to the side panel 13 is a corner thickening area 15, and the area of ​​the top plate 12 other than the corner thickening area 15 is a non-thickening area 16, and the thickness of the corner thickening area 15 is greater than the thickness of the non-thickening area 16. In this way, the corners of the sealing cover body 1 are locally thickened to ensure that after being impacted by high temperature and / or low temperature, no gaps or cracks will be generated at the corners of the sealing cover body 1, thereby avoiding failure of airtightness at the corners of the sealing cover body 1.

[0071] In one embodiment, the thickness of the corner thickened area 15 is 1.8-2.5 mm; the thickness of the non-thickened area 16 is slightly smaller than the thickness of the corner thickened area 15, for example, the thickness of the corner thickened area 15 is 1.8, and the thickness of the non-thickened area 16 is 1.5 mm. While ensuring sufficient strength of the sealing cover body 1, the weight of the sealing cover 10 is reduced.

[0072] In one embodiment, the sealing cover body 1 further includes a sealing extension portion 14, and the sealing extension portion 14 extends in a direction away from the cavity and is connected to a partial circumference of the top plate 12 or at least a partial circumference of the side wall plate 13. The ratio of the thickness of the sealing extension portion 14 to the thickness of the non-thickened area 16 is 1.5 - 2.5. The sealing extension portion 14 is used for connecting with the tray and requires greater strength, and thus, its thickness is larger than that of the non-thickened area 16. For example, the thickness of the sealing extension portion 14 is 3 mm.

[0073] On the other hand, an embodiment of the present invention further provides a battery pack housing, including a tray and the sealing cover 10 of the above embodiment. The sealing cover body 1 is disposed on the top opening of the tray to enclose and form a receiving space for receiving a battery pack.

[0074] The battery pack housing provided by the embodiment of the present invention has all the advantages of the sealing cover 10 of the above embodiment.

[0075] On yet another aspect, an embodiment of the present invention further provides a battery pack, including a battery pack and the battery pack housing of the above embodiment. The battery pack is disposed in the receiving space.

[0076] The battery pack provided by the embodiment of the present invention has all the advantages of the sealing cover 10 of the above embodiment.

[0077] On yet another aspect, an embodiment of the present invention further provides an electrical device, including the above battery pack.

[0078] The electrical device may be a vehicle, an aircraft, a computer, an energy storage device, etc.

[0079] The electrical device provided by the embodiment of the present invention has all the advantages of the sealing cover 10 of the above embodiment.

[0080] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A sealing cover, characterized in that: The utility model comprises a sealing cover body, a pressure plate and an inspection port cover, wherein the sealing cover body is provided with an inspection port, the pressure plate surrounds the inspection port and is connected to the inner surface of the sealing cover body, the inspection port cover covers the inspection port and is provided on the outer surface of the sealing cover body, and the inspection port cover can close or open the inspection port; The pressure plate includes a pressure plate body surrounding the inspection port and a plurality of connectors connected to a surface of the pressure plate body on one side away from the sealing cover body, wherein the plurality of connectors are arranged at intervals around the inspection port; The sealing cover also includes a plurality of fasteners arranged in one-to-one correspondence with the plurality of connecting members, and each of the fasteners is detachably connected to the corresponding connecting member to detachably connect the pressure plate and the inspection port cover.

2. The sealing cover according to claim 1, characterized in that: The connecting piece is a blind hole nut, and the fastener is a bolt; The inspection port cover is provided with a plurality of mounting holes, and the plurality of mounting holes are arranged in a one-to-one correspondence with the plurality of blind hole nuts; the pressure plate body is provided with a plurality of through holes, and the plurality of through holes are arranged in a one-to-one correspondence with the plurality of blind hole nuts; Each of the bolts passes through the corresponding mounting hole and through hole and is threadedly connected to the corresponding internal threaded hole of the blind hole nut.

3. The sealing cover according to claim 2, characterized in that: The pressing plate body comprises a pressing plate main board and a plurality of bosses which are fixedly connected or integrally formed, the plurality of bosses are arranged in one-to-one correspondence with the plurality of blind hole nuts, the bosses have inner holes which penetrate the pressing plate body, and the inner holes of the bosses are the through holes; The sealing cover body is provided with a plurality of through holes around the inspection port, each of the bosses is penetrated in the corresponding through hole and protrudes from the outer surface of the sealing cover body, and the pressure plate main board is attached to the inner surface of the sealing cover body.

4. The sealing cover according to claim 3, characterized in that: The boss is cylindrical.

5. The sealing cover according to claim 3, characterized in that: The thickness of the pressure plate main board is 0.6-1.5 mm.

6. The sealing cover according to claim 2, characterized in that: The blind hole nut is press-welded to the pressing plate body.

7. The sealing cover according to any one of claims 1 to 6, characterized in that: A sealing member is sandwiched between the inspection port cover and the sealing cover body, and the sealing member is arranged around the inspection port.

8. The sealing cover according to claim 7, characterized in that: The sealing element is sealing cotton, and the thickness of the sealing cotton after compression is 1.5-5mm.

9. The sealing cover according to any one of claims 1 to 6, characterized in that: The sealing cover body is a composite material part; The sealing cover body and the pressing plate are fixedly connected by molding or hot pressing.

10. The sealing cover according to any one of claims 1 to 6, characterized in that: The sealing cover body comprises a top plate and a side panel, wherein the side panel is arranged around at least a portion of the periphery of the top plate to enclose and form a cavity, wherein the cavity is used to accommodate at least a portion of the battery pack, and the inspection port is arranged on the top plate; The sealing cover body is roughly rectangular, and the position where each corner of the top plate connects with the corner corresponding to the side panel is a corner thickening area. The area of ​​the top plate other than the corner thickening area is a non-thickening area, and the thickness of the corner thickening area is greater than the thickness of the non-thickening area.

11. The sealing cover according to claim 10, characterized in that: The sealing cover body also includes a sealing extension portion, which extends in a direction away from the cavity and is connected to a portion of the periphery of the top plate or at least a portion of the periphery of the side panel; the thickness of the sealing extension portion is greater than the thickness of the non-thickened area.

12. The sealing cover according to claim 11, characterized in that: The thickness of the corner thickened area is 1.8-2.5 mm; and / or, The ratio of the thickness of the sealing extension portion to the thickness of the non-thickened area is 1.5-2.

5.

13. A battery pack housing, characterized in that: It comprises a tray and the sealing cover according to any one of claims 1 to 12, wherein the sealing cover body is arranged at the opening of the tray to enclose and form a receiving space for receiving a battery pack.

14. A battery pack, characterized in that: It comprises a battery pack and the battery pack shell as claimed in claim 13, wherein the battery pack is arranged in the accommodating space.

15. An electrical equipment, characterized in that: A battery pack comprising the battery pack of claim 14.

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