Battery cover plate assembly and secondary battery

Abstract

The utility model provides a battery cover plate assembly and a secondary battery, and relates to the technical field of batteries, the battery cover plate assembly comprises a battery cover plate main body and a pull riveting piece, the pull riveting piece is sequentially inserted into an upper assembly hole, an upper mounting hole and a lower assembly hole from one side of the upper end face of a pole, and the upper mounting hole is connected with the lower assembly hole. And the pull riveting piece is used for connecting the pole and the connecting piece and clamping the battery cover plate main body. According to the battery cover plate assembly provided by the utility model, the pull riveting piece is sequentially inserted into the upper assembly hole, the upper mounting hole and the lower assembly hole; the pull riveting piece enables the pole and the connecting piece to be connected and enables the pole and the connecting piece to clamp the battery cover plate main body; compared with the prior art, the post does not need to be provided with a lower bottom plate, so that the cost is reduced, the resistance is reduced, the battery cover plate assembly is connected with the post by utilizing the riveting piece, and the bad problem caused by an injection molding process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery cover assembly and a secondary battery. Background Art

[0002] With the development of batteries, the demand and output of batteries are increasing. In order to reduce the cost of battery covers, it is necessary to optimize the structure, process steps and other aspects. During the assembly process of existing battery covers, the top cover, the pole and the lower plastic are formed into an assembly by integrated injection molding.

[0003] The one-piece injection molding method is prone to cracks or glue shortages, which will cause the risk of leakage over time and reduce battery consistency. Utility Model Content

[0004] The purpose of the utility model is to provide a battery cover assembly and a secondary battery to alleviate the problem that the battery cover formed by one-piece injection molding is prone to cracks or glue deficiency, which will cause the risk of leakage over time and reduce the technical problem of battery consistency.

[0005] The utility model provides a battery cover assembly, comprising a battery cover body and a rivet, wherein at least one upper mounting hole is arranged on the battery cover body, a pole is arranged on the upper end surface of the battery cover body, and a connecting piece is arranged on the lower end surface of the battery cover body;

[0006] An upper assembly hole is provided on the pole, and a lower assembly hole is provided on the connecting plate; the rivet is inserted into the upper assembly hole, the upper mounting hole and the lower assembly hole in sequence from one side of the upper end surface of the pole, and the rivet is used to connect the pole and the connecting plate and clamp the battery cover body.

[0007] In an optional embodiment, an upper groove is provided on the upper end surface of the pole, and the upper groove is arranged concentrically with the upper assembly hole; and the diameter of the upper groove is greater than the diameter of the upper assembly hole.

[0008] In an optional embodiment, the connecting piece includes a connecting piece body, an upper assembly protrusion and at least one branch connecting piece;

[0009] The upper assembly protrusion is arranged on the upper end surface of the connecting piece body, and a lower punch hole is arranged on the lower end surface of the connecting piece body, and the lower punch hole is arranged corresponding to the upper assembly protrusion;

[0010] The lower assembly hole is arranged on the upper assembly protrusion, and the lower assembly hole is communicated with the lower punching hole.

[0011] In an optional embodiment, two branch connection pieces are provided on the connection piece main body.

[0012] In an optional embodiment, it further comprises a lower plastic, wherein a lower mounting hole is provided on the lower plastic, and a lower fixing hole is provided at the lower end of the lower plastic and is arranged concentrically with the lower mounting hole;

[0013] The upper assembly protrusion is provided with a sealing ring, the sealing ring comprises a first sealing portion and a second sealing portion, and the second sealing portion is provided at an upper end of the first sealing portion;

[0014] The first sealing portion is assembled in the lower fixing hole, the second sealing portion is assembled in the upper mounting hole, and the second sealing portion is located between the upper mounting protrusion and the inner wall of the upper mounting hole.

[0015] In an optional embodiment, it further includes an upper plastic, wherein the upper plastic is disposed between the battery cover body and the pole;

[0016] The upper plastic comprises an upper plastic body, a through hole is arranged on the upper plastic body, an upper annular plate is arranged on the outer side of the upper end surface of the upper plastic body, and the upper annular plate forms an upper mounting groove; a lower annular plate is arranged on the lower end surface of the lower plastic body along the outer side of the through hole;

[0017] The lower annular plate is assembled into the upper mounting hole and abuts against the second sealing portion; the upper mounting groove is used for assembling the pole.

[0018] In an optional embodiment, a lower protrusion matching the through hole is provided at the lower end of the pole, and the lower protrusion is assembled in the through hole.

[0019] In an optional embodiment, the pole is made of aluminum.

[0020] In an optional embodiment, two upper mounting holes are provided on the battery cover body.

[0021] The battery cover plate assembly provided by the utility model has a battery cover plate body with an upper mounting hole, a pole is arranged on the upper end surface of the battery cover plate body, and the pole is provided with an upper mounting hole, a connecting piece is used to be connected with a pole ear of a battery cell, and a lower mounting hole is provided on the connecting piece; a rivet is sequentially inserted into the upper mounting hole, the upper mounting hole and the lower mounting hole, and the rivet connects the pole and the connecting piece and enables the pole and the connecting piece to clamp the battery cover plate body;

[0022] Compared with the prior art, the pole does not need to be provided with a lower base plate, which reduces costs and reduces resistance. The battery cover assembly and the pole are connected by rivets, avoiding the adverse problems caused by the injection molding process.

[0023] The utility model provides a secondary battery, comprising the battery cover assembly described in any one of the above-mentioned implementation modes.

[0024] Compared with the prior art, the secondary battery provided by the utility model has the battery cover assembly provided by the utility model, and thus has all the beneficial effects of the battery cover assembly provided by the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the structure of a battery cover assembly provided in an embodiment of the utility model;

[0027] Figure 2 for Figure 1 The structural schematic diagram of the AA section of the battery cover assembly shown;

[0028] Figure 3 for Figure 2 A partial enlarged view of B of the structural schematic diagram of the AA section of the battery cover assembly shown;

[0029] Figure 4 for Figure 1 A schematic structural diagram of the battery cover assembly from another angle shown;

[0030] Figure 5 for Figure 1 A schematic structural diagram of a battery cover plate main body of a battery cover plate assembly shown;

[0031] Figure 6 for Figure 1 A schematic diagram of the structure of the lower plastic of the battery cover assembly shown;

[0032] Figure 7 for Figure 1 A schematic structural diagram of the lower plastic of the battery cover assembly from another angle;

[0033] Figure 8 for Figure 1 A schematic structural diagram of a connecting piece of a battery cover assembly shown;

[0034] Fig. 9 for Figure 8 A schematic structural diagram of the connecting piece from another angle shown;

[0035] Fig.10 for Figure 1A schematic structural diagram of a sealing ring of a battery cover assembly shown;

[0036] Fig.11 for Figure 1 A schematic diagram of the structure of the upper plastic of the battery cover assembly shown;

[0037] Fig.12 for Fig.11 A schematic diagram of the structure of the upper plastic from another angle shown;

[0038] Fig.13 for Fig.11 A schematic structural diagram of the upper plastic from another angle;

[0039] Fig.14 for Figure 1 A schematic structural diagram of a longitudinal section of a pole of a battery cover assembly shown;

[0040] Fig.15 for Figure 1 The schematic diagram of the structure of the connection between the pole, upper plastic, sealing ring and connecting plate of the battery cover assembly is shown.

[0041] Icons: 100-battery cover body; 101-upper mounting hole; 200-pole; 201-lower protrusion; 202-upper assembly hole; 300-rivet; 400-lower plastic; 401-lower mounting hole; 402-lower fixing hole; 500-upper groove; 600-upper plastic; 601-upper mounting groove; 602-through hole; 603-lower annular plate; 604-upper annular plate; 700-sealing ring; 701-first sealing part; 702-second sealing part; 800-connecting plate; 801-connecting plate body; 802-upper assembly protrusion; 803-lower assembly hole; 804-branch connecting plate; 805-lower punching hole. DETAILED DESCRIPTION

[0042] The terms “first”, “second”, “third”, etc. are only used for distinguishing descriptions and do not indicate the order of arrangement, nor can they be understood as indicating or implying relative importance.

[0043] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0044] In the description of the present application, it should be noted that the terms "inside", "outside", "left", "right", "up", "down", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the products of the present application are usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0045] In the description of this application, unless otherwise clearly specified and limited, the terms "set", "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0046] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings.

[0047] Reference Figure 1-Figure 15 The utility model provides a battery cover assembly, including a battery cover body 100 and a rivet 300, wherein at least one upper mounting hole 101 is provided on the battery cover body 100, and a pole 200 is provided on the upper end surface of the battery cover body 100, and a connecting piece 800 is provided on the lower end surface of the battery cover body 100;

[0048] An upper assembly hole 202 is provided on the pole 200, and a lower assembly hole 803 is provided on the connecting piece 800; the rivet 300 is inserted into the upper assembly hole 202, the upper mounting hole 101 and the lower assembly hole 803 in sequence from one side of the upper end surface of the pole 200, and the rivet 300 is used to connect the pole 200 and the connecting piece 800 and clamp the battery cover body 100.

[0049] In some embodiments, the battery cover body 100 of the battery cover assembly is generally provided with two upper mounting holes 101 , that is, one upper mounting hole 101 is used to install the positive electrode column 200 , and one upper mounting hole 101 is used to install the negative electrode column 200 .

[0050] An upper assembly hole 202 is provided on the pole 200, and a lower assembly hole 803 is provided on the connecting piece 800, wherein the connecting piece 800 is used for connecting with the pole ear of the battery cell; the pole 200 is located on the upper end surface of the battery cover body 100, and the connecting piece 800 is located on the lower end surface of the battery cover body 100; the rivet 300 is inserted from the upper assembly hole 202 to and sequentially inserted into the upper mounting hole 101 and the lower assembly hole 803, the rivet 300 connects the pole 200 and the connecting piece 800 and clamps the battery cover body 100, thereby fixing the pole 200 and the battery cover body 100 together.

[0051] The rivet 300 includes a nail core and a rivet body, wherein one end of the nail core has a nail tip and the other end has a nail core head; wherein the rivet body is sleeved on the nail core and has a brim on the rivet body; one end of the nail core head is inserted from the upper assembly hole 202 and sequentially inserted into the upper mounting hole 101 and the lower assembly hole 803; the brim of the rivet body is located on the upper end surface of the pole 200; when riveting, the nail core head drives the rivet body to move upward, while the brim remains fixed; the rivet body is deformed and cooperates with the brim to clamp the pole 200 and the connecting plate 800, thereby realizing the connection between the pole 200 and the connecting plate 800 and connecting the pole 200 to the battery cover plate body 100.

[0052] Reference Figure 3 and Fig.14 In an optional embodiment, an upper groove 500 is provided on the upper end surface of the pole 200 , and the upper groove 500 is concentrically arranged with the upper assembly hole 202 ; and the diameter of the upper groove 500 is greater than the diameter of the upper assembly hole 202 .

[0053] In some embodiments, the upper end surface of the pole 200 has an upper groove 500, and the brim of the rivet body of the rivet 300 is located in the upper groove 500; in this way, after the rivet 300 is riveted, the brim is located in the upper groove 500, reducing the impact of the rivet 300 on the pole 200 and facilitating the welding of the pole 200 and the aluminum strip.

[0054] Reference Figure 8 and Fig. 9 In an optional embodiment, the connecting piece 800 includes a connecting piece body 801, an upper assembly protrusion 802 and at least one branch connecting piece 804;

[0055] The upper assembly protrusion 802 is arranged on the upper end surface of the connecting piece body 801, and a lower punch hole 805 is arranged on the lower end surface of the connecting piece body 801, and the lower punch hole 805 is arranged corresponding to the upper assembly protrusion 802;

[0056] The lower assembly hole 803 is provided on the upper assembly protrusion 802 , and the lower assembly hole 803 is communicated with the lower punching hole 805 .

[0057] The connecting piece body 801 is generally punched out with a lower punch hole 805 and an upper assembly protrusion 802 by a forming process such as stamping, extrusion, and cold drawing, and the lower assembly hole 803 is arranged on the upper assembly protrusion 802 .

[0058] When the connecting piece body 801 abuts against the battery cover body 100, the upper assembly protrusion 802 on the connecting piece body 801 can be inserted into the upper mounting hole 101, thereby realizing the connection between the connecting piece 800 and the pole 200, and the upper mounting hole 101 limits the position of the connecting piece 800, so that the connecting piece 800 is firmly connected to the battery cover body 100.

[0059] Generally, the battery cover body 100 is made of metal, generally aluminum; two branch connection pieces 804 are provided on the connection piece body 801. Generally, the positive pole ear of the battery cell forms two positive pole ear parts, each positive pole ear part is connected to a branch connection piece 804, and when multiple positive pole ears of the battery cell are superimposed to form a positive pole ear part, a branch connection piece 804 is provided on the connection piece body 801; similarly, the negative pole ear of the battery cell forms two negative pole ear parts.

[0060] Reference Figure 6 , Figure 7 and Fig.15 In an optional embodiment, it further includes a lower plastic 400, wherein the lower plastic 400 is provided with a lower mounting hole 401, and the lower end of the lower plastic 400 is provided with a lower fixing hole 402 which is concentric with the lower mounting hole 401;

[0061] The upper assembly protrusion 802 is provided with a sealing ring 700, and the sealing ring 700 includes a first sealing portion 701 and a second sealing portion 702, wherein the second sealing portion 702 is provided at the upper end of the first sealing portion 701;

[0062] The first sealing portion 701 is assembled in the lower fixing hole 402 , the second sealing portion 702 is assembled in the upper mounting hole 101 , and the second sealing portion 702 is located between the upper assembly protrusion 802 and the inner wall of the upper mounting hole 101 .

[0063] In some embodiments, the battery cover assembly also includes a lower plastic 400, on which a lower mounting hole 401 is provided, and the lower mounting hole 401 is provided corresponding to the upper mounting hole 101; a lower fixing hole 402 is provided on the lower end surface of the lower plastic 400; the diameter of the lower fixing hole 402 is larger than the diameter of the lower mounting hole 401; the first sealing portion 701 of the sealing ring 700 is assembled in the lower fixing hole 402, and the second sealing portion 702 can be inserted into the upper mounting hole 101 through the lower assembly hole 803; the second sealing portion 702 can play a role in physically isolating the first assembly protrusion from the inner wall of the upper mounting hole 101; that is, the first assembly protrusion is not electrically connected to the battery cover body 100, thereby avoiding short circuit between the two poles 200.

[0064] After the upper assembly protrusion 802 of the connecting piece 800 is inserted from the lower fixing hole 402, it is inserted into the upper mounting hole 101 through the lower mounting hole 401. The connecting piece body 801 cannot pass through the lower mounting hole 401. After the upper assembly protrusion 802 is connected to the pole 200, the connecting piece body 801 and the pole 200 cooperate to connect the battery cover body 100, the lower plastic 400 and the pole 200 together to form an assembly.

[0065] Reference Fig.11 , Fig.12 and Fig.13 In an optional embodiment, it includes an upper plastic 600, and the upper plastic 600 is arranged between the battery cover body 100 and the pole 200;

[0066] The upper plastic 600 includes an upper plastic 600 body, a through hole 602 is provided on the upper plastic 600 body, an upper annular plate 604 is provided on the outer side of the upper end surface of the upper plastic 600 body, and the upper annular plate 604 surrounds an upper mounting groove 601; a lower annular plate 603 is provided on the lower end surface of the lower plastic 400 body along the outer side of the through hole 602;

[0067] The lower annular plate 603 is assembled into the upper mounting hole 101 and abuts against the second sealing portion 702 ; the upper mounting groove 601 is used for assembling the pole 200 .

[0068] In some embodiments, the upper plastic 600 is located between the pole 200 and the battery cover body 100, and the upper plastic 600 has a through hole 602; the upper annular plate 604 of the upper plastic 600 surrounds an upper mounting groove 601, and the pole 200 is assembled in the upper mounting groove 601; the lower annular plate 603 of the lower plastic 400 is assembled into the lower mounting hole 401, and the lower annular plate 603 abuts against the second sealing portion 702, so that the upper annular plate 604 and the second sealing portion 702 cooperate to physically isolate the pole 200 and the upper assembly protrusion 802 from the battery cover body 100; the materials of the upper plastic 600 and the sealing ring 700 are both non-metallic; the material of the sealing ring 700 is rubber, and the material of the upper plastic 600 and the lower plastic 400 is polyphenylene sulfide.

[0069] Reference Figure 3 and Fig.14 In an optional embodiment, a lower protrusion 201 matching the through hole 602 is provided at the lower end of the pole 200 , and the lower protrusion 201 is assembled in the through hole 602 .

[0070] A lower protrusion 201 is disposed at the lower end of the pole 200 . The lower protrusion 201 can be inserted into the through hole 602 of the upper plastic 600 and abut against the upper assembly protrusion 802 .

[0071] In an optional implementation, the pole 200 is made of aluminum.

[0072] Reference Figure 5 In an optional embodiment, two upper mounting holes 101 are provided on the battery cover body 100 .

[0073] The battery cover plate body 100 of the battery cover plate assembly provided by the utility model has an upper mounting hole 101, the pole 200 is arranged on the upper end surface of the battery cover plate body 100, and the pole 200 is provided with an upper assembly hole 202, the connecting piece 800 is used to connect with the pole ear of the battery core, and a lower assembly hole 803 is provided on the connecting piece 800; the rivet 300 is inserted into the upper assembly hole 202, the upper mounting hole 101 and the lower assembly hole 803 in sequence, and the rivet 300 connects the pole 200 and the connecting piece 800 and clamps the battery cover plate body 100;

[0074] Compared with the prior art, the pole 200 does not need to be provided with a lower base plate, which reduces costs and reduces resistance. The battery cover assembly and the pole 200 are connected by rivets 300, avoiding the adverse problems caused by the injection molding process.

[0075] The utility model provides a secondary battery, comprising the battery cover assembly described in any one of the above-mentioned implementation modes.

[0076] Compared with the prior art, the secondary battery provided by the utility model has the battery cover assembly provided by the utility model, and thus has all the beneficial effects of the battery cover assembly provided by the utility model.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A battery cover assembly, characterized in that: The invention comprises a battery cover body (100) and a rivet (300), wherein at least one upper mounting hole (101) is arranged on the battery cover body (100), a pole (200) is arranged on the upper end surface of the battery cover body (100), and a connecting piece (800) is arranged on the lower end surface of the battery cover body (100); The pole (200) is provided with an upper assembly hole (202), and the connecting piece (800) is provided with a lower assembly hole (803); the rivet (300) is inserted into the upper assembly hole (202), the upper mounting hole (101) and the lower assembly hole (803) in sequence from one side of the upper end surface of the pole (200), and the rivet (300) is used to connect the pole (200) and the connecting piece (800) and clamp the battery cover body (100).

2. The battery cover assembly according to claim 1, characterized in that: An upper groove (500) is provided on the upper end surface of the pole (200), and the upper groove (500) is arranged concentrically with the upper assembly hole (202); and the diameter of the upper groove (500) is greater than the diameter of the upper assembly hole (202).

3. The battery cover assembly according to claim 2, characterized in that: The connecting piece (800) comprises a connecting piece body (801), an upper assembly protrusion (802) and at least one branch connecting piece (804); The upper assembly protrusion (802) is arranged on the upper end surface of the connecting piece body (801), and a lower punch hole (805) is arranged on the lower end surface of the connecting piece body (801), and the lower punch hole (805) is arranged corresponding to the upper assembly protrusion (802); The lower assembly hole (803) is provided on the upper assembly protrusion (802), and the lower assembly hole (803) is communicated with the lower punching hole (805).

4. The battery cover assembly according to claim 3, characterized in that: The connecting piece main body (801) is provided with two branch connecting pieces (804).

5. The battery cover assembly according to claim 3, characterized in that: It also includes a lower plastic (400), wherein the lower plastic (400) is provided with a lower mounting hole (401), and the lower end of the lower plastic (400) is provided with a lower fixing hole (402) arranged concentrically with the lower mounting hole (401); A sealing ring (700) is arranged on the upper assembly protrusion (802), and the sealing ring (700) comprises a first sealing portion (701) and a second sealing portion (702), and the second sealing portion (702) is arranged on the upper end of the first sealing portion (701); The first sealing portion (701) is assembled in the lower fixing hole (402), the second sealing portion (702) is assembled in the upper mounting hole (101), and the second sealing portion (702) is located between the upper mounting protrusion (802) and the inner wall of the upper mounting hole (101).

6. The battery cover assembly according to claim 5, characterized in that: It also includes an upper plastic (600), wherein the upper plastic (600) is arranged between the battery cover body (100) and the pole (200); The upper plastic (600) comprises an upper plastic (600) body, a through hole (602) is arranged on the upper plastic (600) body, an upper annular plate (604) is arranged on the outer side of the upper end surface of the upper plastic (600) body, and the upper annular plate (604) forms an upper mounting groove (601); a lower annular plate (603) is arranged on the lower end surface of the lower plastic (400) body along the outer side of the through hole (602); The lower annular plate (603) is assembled into the upper mounting hole (101) and abuts against the second sealing portion (702); the upper mounting groove (601) is used to assemble the pole (200).

7. The battery cover assembly according to claim 6, characterized in that: A lower protrusion (201) matching the through hole (602) is provided at the lower end of the pole (200), and the lower protrusion (201) is assembled in the through hole (602).

8. The battery cover assembly according to claim 7, characterized in that: The pole (200) is made of aluminum.

9. The battery cover assembly according to claim 1, characterized in that: The battery cover plate body (100) is provided with two upper mounting holes (101).

10. A secondary battery, characterized in that: Comprising the battery cover assembly according to any one of claims 1-9.

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