Battery cover plate assembly

Abstract

The utility model discloses a battery cover plate assembly, which relates to the technical field of batteries, solves the problem that the normal use of a battery is influenced due to the fact that a pole of the battery cover plate assembly is not firmly fixed, and comprises a cover plate, two through holes are formed in the cover plate, a sinking table is formed in each through hole, and a plurality of through holes are formed in the sinking table. A connecting ring integrally formed with the cover plate is arranged at the position of each via hole in the cover plate; a positive pole and a negative pole; the first rubber coating part is connected with the connecting ring in a clamped mode, the first rubber coating part wraps the step structure and supports the bottom of the step structure, a spin riveting part is formed on the top of the connecting ring in a spin riveting mode, and the spin riveting part wraps the first rubber coating part; and the second rubber coating piece is wrapped on the outer side of the connecting ring. The cover plate assembly has the advantages of being simple in structure, easy to manufacture, low in production cost and the like, the assembly difficulty is reduced due to the special structural design, welding procedures are reduced, and the polar columns can be prevented from moving at will.

Description

Technical Field

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

[0002] A typical power battery consists of a cover assembly, a housing, and battery cells. The cover assembly not only forms a cavity with the housing for the battery cells but also provides electrical connectivity between the battery cells and external devices. To ensure the safety of the battery cells within the wall cavity and smooth connection to the outside world, the cover assembly often has a complex structure.

[0003] The overall structure of the battery cover assembly with the publication number CN219575770U in the prior art is relatively complex, in which the connecting ring and the cover are two separate entities, and the connecting ring is welded to the cover. Therefore, there is an additional welding process during assembly, which will increase the production cost of the battery cover assembly. At the same time, the bottom of the pole is supported by a limiting ring, and the outer periphery of the step structure on the pole is also in contact with the limiting ring. The upper part of the step structure is pressed by the insulating part, that is, the step structure on the pole is wrapped and fixed by the connecting ring and the insulating part. Since the insulating part is injection molded, if the connection between the insulating part and the connecting ring is not tight enough, the pole may move up and down. If the welding between the connecting ring and the cover is not strong enough, the connecting ring will be offset to the left and right, and then the pole may move to the left and right, affecting the use of the battery. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems and designs a battery cover assembly, which solves the problem that the battery cover assembly is not firmly fixed to the pole, affecting the normal use of the battery.

[0005] To achieve the above-mentioned purpose, the technical solution of the present invention is a battery cover assembly, comprising:

[0006] A cover plate, wherein the cover plate has two via holes corresponding to the positive and negative electrodes of the battery, respectively, and a sink is formed in the via holes. The cover plate has a connecting ring integrally formed with the cover plate at the location of each via hole;

[0007] The positive electrode column and the negative electrode column are respectively placed on the sunken platform corresponding to the positive electrode and the negative electrode of the battery, and the outer sides of the positive electrode column and the negative electrode column extend outward to form a step structure;

[0008] a first rubber-coated component, the first rubber-coated component being located inside the connecting ring and being clamped with the connecting ring, the first rubber-coated component wrapping the step structure and forming a support at the bottom of the step structure, the top of the connecting ring being riveted to form a rivet portion, the rivet portion wrapping the first rubber-coated component;

[0009] The second rubber-coated part is wrapped around the outside of the connecting ring, and a through hole is formed in the middle of the second rubber-coated part for exposing the positive electrode column and the negative electrode column. The first rubber-coated part is respectively engaged with the second rubber-coated part and the step structure.

[0010] Preferably, sealing rings are provided at the bottom of the positive electrode column and the negative electrode column, and the sealing rings are placed on the sinking platform.

[0011] Preferably, the sinking platform has an annular sealing groove, and the bottom of the sealing ring protrudes downward to form a clamping portion, and the clamping portion is clamped with the sealing groove.

[0012] Preferably, the step structure has at least two first slots, and the inner side of the first rubber-coated component has at least two blocks that are engaged with the first slots.

[0013] Preferably, the outer circumference of the first rubber-coated component is protruded outward to form at least two anti-rotation parts, and the inner side surface of the connecting ring has at least two grooves engaged with the anti-rotation parts.

[0014] Preferably, the inner side of the second rubber-coated component also has at least two clamping blocks, and the clamping blocks are clamped with the grooves.

[0015] Preferably, at least two second slots and / or stoppers are formed on the inner side of the first rubber-coated component, and at least two stoppers and / or second slots are formed on the inner side of the second rubber-coated component, and the stoppers are engaged with the corresponding second slots.

[0016] Preferably, the bottom of the first rubber-coated component is bent inward to form a support portion, and an accommodating groove for accommodating the step structure is formed between the support portion and the inner side surface of the first rubber-coated component.

[0017] Preferably, the middle area of the cover plate has an explosion-proof hole, and an explosion-proof membrane is provided in the explosion-proof hole.

[0018] Compared with the prior art, the beneficial effects are:

[0019] In the present invention, the first rubber-coated part wraps the step structure on the pole and forms a support at the bottom of the pole. Firstly, it can prevent the pole from moving left and right and up and down, and secondly, it can support the pole. The connecting ring and the cover plate are integrally injection-molded, so the connection strength between the two is sufficiently high. The top of the connecting ring is riveted to form a riveted part, which wraps and fixes the first rubber-coated part to prevent the first rubber-coated part from moving upward. The second rubber-coated part wraps the connecting ring to isolate the connecting ring from the outside, exposing only the positive and negative poles. This design makes the overall processing of the battery cover assembly simpler, while reducing the difficulty of assembly and the welding process, which helps to reduce the production cost of the battery cover assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the battery cover assembly of the present utility model;

[0021] Figure 2 This is a schematic diagram of the exploded structure of the battery cover assembly

[0022] Figure 3 1. It is a schematic cross-sectional structural diagram of a battery cover assembly;

[0023] Figure 4 yes Figure 3 A magnified view of the structure at point A;

[0024] Figure 5 It is a structural schematic diagram of the cover plate in the battery cover plate assembly;

[0025] Figure 6 It is a structural diagram of the first rubber-encapsulated component in the battery cover assembly;

[0026] Figure 7 It is a structural diagram of the second rubber-encapsulated component in the battery cover assembly;

[0027] Figure 8 It is a structural diagram of the negative electrode column in the battery cover assembly;

[0028] Figure 9 It is a structural diagram of the sealing ring in the battery cover assembly.

[0029] In the figure, 1. cover plate; 101. through hole; 102. sink; 103. groove; 104. sealing groove; 105. explosion-proof hole; 2. negative pole; 21. step structure; 211. first slot; 3. positive pole; 4. second rubber-coated component; 5. first rubber-coated component; 501. anti-rotation part; 502. stop part; 503. second slot; 504. block; 505. support part; 6. connecting ring; 601. rivet part; 7. sealing ring; 701. clamping part; 8. film; 9. explosion-proof membrane. DETAILED DESCRIPTION

[0030] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] like Figure 1-Figure 4As shown, a preferred embodiment of the present invention proposes a battery cover assembly, which mainly includes a cover 1, a positive electrode post 3, a negative electrode post 2, a first rubber package 5, a second rubber package 4 and other components, wherein a through hole 101 is respectively opened at the positive and negative poles of the cover 1, and a sink 102 is formed in the through hole 101 for placing the positive electrode post 3 and the negative electrode post 2.

[0032] refer to Figure 5 On the cover plate 1, each via hole 101 is provided with a connecting ring 6. The connecting ring 6 is integrally formed with the cover plate 1 to ensure the connection strength between the connecting ring 6 and the cover plate 1 while reducing the welding process. The inner diameter of the connecting ring 6 is consistent with the diameter of the sink 102.

[0033] A sealing ring 7 is provided on each sink 102 . The sealing ring 7 is located at the bottom of the positive electrode column 3 and the negative electrode column 2 to form a seal on the bottom surface of the column.

[0034] refer to Figure 9 The bottom surface of the sealing ring 7 protrudes downward to form an annular clamping portion 701. At the same time, a circle of sealing grooves 104 is opened on the sinking platform 102. The shape of the sealing grooves 104 is consistent with the shape of the clamping portion 701. After the sealing ring 7 is placed on the sinking platform 102, the clamping portion 701 will be clamped with the sealing ring 7. First, it can prevent the sealing ring 7 from moving left and right. Second, it helps to enhance the sealing performance of the sealing ring 7. The upper surface of the sealing ring 7 is tightly attached to the bottom surface of the positive electrode column 3 and the negative electrode column 2.

[0035] The outer diameter of the sealing ring 7 is larger than the diameter of the through hole 101 on the cover plate 1, and smaller than the maximum diameter of the positive electrode post 3 and the negative electrode post 2. Therefore, a space for accommodating the first rubber cover 5 is formed between the electrode post and the connecting ring 6.

[0036] refer to Figure 4 、 Figure 8 The outer peripheries of the positive electrode column 3 and the negative electrode column 2 extend outward to form a step structure 21, so that the cross-sectional shape of the positive electrode column 3 and the negative electrode column 2 is a "convex" shape.

[0037] refer to Figure 6 The bottom of the first rubber coating 5 is bent inward at 90° to form a support portion 505. An annular receiving groove is formed between the support portion 505 and the main body of the first rubber coating 5. The maximum diameter of the receiving groove is consistent with the maximum diameter of the step structure 21. Therefore, the receiving groove can completely accommodate the step structure 21, and the first rubber coating 5 can wrap the step structure 21.

[0038] The support portion 505 at the bottom of the first rubber coating 5 supports the bottoms of the positive electrode 3 and the negative electrode 2. The accommodating grooves in the first rubber coating 5 prevent the electrodes from moving left and right and up and down. The first rubber coating 5 also isolates the positive electrode 3 and the negative electrode 2 from the cover plate 1. The first rubber coating 5 is made of an insulating material and provides insulation.

[0039] Three anti-rotation features 501 are formed on the outer circumference of the first rubber cover 5, and three grooves 103 are formed on the inner side of the connecting ring 6, corresponding to the positions of the anti-rotation features 501. The anti-rotation features 501 engage with the grooves 103 to prevent relative rotation between the first rubber cover 5 and the cover 1. Three locking blocks 504 are formed on the inner side of the second rubber cover 4, and the positions of the three locking blocks 504 correspond to the positions of the grooves 103. The locking blocks 504 engage with the grooves 103 to prevent relative rotation between the second rubber cover 4 and the cover 1.

[0040] refer to Figure 3 , Figure 8 Four slots, namely first slots 211, are formed on the upper surface of the step structure 21 of the positive electrode post 3 and the negative electrode post 2. The four first slots 211 are evenly distributed along the circumference of the step structure 21. At the same time, four locking blocks 504 are formed on the inner side of the first rubber coating 5. The positions of the four locking blocks 504 correspond to the positions of the four first slots 211 one by one. The locking blocks 504 will engage with the first slots 211, thereby preventing relative rotation between the positive electrode post 3 and the negative electrode post 2 and the first rubber coating 5.

[0041] like Figure 6 and Figure 7 As shown, the first rubber-wrapped component 5 and the second rubber-wrapped component 4 are also connected to each other. To this end, eight semicircular stoppers 502 are formed on the inner circumference of the first rubber-wrapped component 5 in the direction of the center of the circle, and eight semicircular slots, namely second slots 503, are also provided. The eight stoppers 502 and the eight second slots 503 are spaced apart. Eight second slots 503 and eight stoppers 502 are also formed at corresponding positions on the inner side of the second rubber-wrapped component 4. These eight second slots 503 and eight stoppers 502 are also spaced apart. The stoppers 502 on the first rubber-wrapped component 5 will be snapped together with the second slots 503 on the second rubber-wrapped component 4, and the second slots 503 on the first rubber-wrapped component 5 will be snapped together with the stoppers 502 on the second rubber-wrapped component 4. This has two functions. Firstly, it can prevent the first rubber-wrapped component 5 and the second rubber-wrapped component 4 from rotating relative to each other, and secondly, it helps to enhance the tightness of the connection between the first rubber-wrapped component 5 and the second rubber-wrapped component 4.

[0042] During assembly, the sealing ring 7 is first placed on the sink 102, and then the positive electrode post 3 and the negative electrode post 2 are placed. Then, the rubber is injection molded inward to form a first rubber-encapsulated part 5. The first rubber-encapsulated part 5 will wrap the step structure 21 on the positive electrode post 3 and the negative electrode post 2. Then, the top of the connecting ring 6 is riveted by a riveting process, so that the top of the connecting ring 6 is bent inward by 90 degrees to form a riveted part 601 with a rounded corner structure. For the specific structure, see 4, Figure 5 The rivet portion 601 will be in close contact with the upper surface of the first rubber-wrapped component 5, wrapping the first rubber-wrapped component 5 and preventing the first rubber-wrapped component 5 from moving up and down.

[0043] After the riveting process of the connecting ring 6 is completed, the second rubber coating part 4 is overmolded. After the second rubber coating part 4 is overmolded, it completely wraps the connecting ring 6 and extends downward to fill the empty space between the connecting ring 6 and the positive electrode post 3 and the negative electrode post 2, completely covering the step structure 21 on the positive electrode post 3 and the negative electrode post 2, thereby firmly fixing the positive electrode post 3 and the negative electrode post 2.

[0044] refer to Figure 2 、 Figure 5 An explosion-proof hole 105 is provided in the middle of the cover plate 1 to relieve pressure and prevent battery explosion. An explosion-proof membrane 9 is installed within the hole 105. When the pressure within the battery exceeds the maximum pressure that the membrane 9 can withstand, the membrane 9 ruptures, relieving the pressure. A film 8 is also applied to the location of the explosion-proof hole 105 on the cover plate 1 to prevent dust.

[0045] The above technical solutions only reflect the preferred technical solutions of the present utility model. Any changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the present utility model and fall within the scope of protection of the present utility model.

Claims

1. A battery cover assembly, characterized in that: include: A cover plate (1), the cover plate (1) having two through holes (101) corresponding to the positive and negative electrodes of the battery, respectively, a sink (102) formed in the through hole (101), and the cover plate (1) having a connecting ring (6) integrally formed with the cover plate (1) at the location of each through hole (101); The positive electrode column (3) and the negative electrode column (2) are respectively placed on the sinks (102) corresponding to the positive electrode and the negative electrode of the battery, and the outer sides of the positive electrode column (3) and the negative electrode column (2) extend outward to form a step structure (21); A first rubber-coated part (5), the first rubber-coated part (5) is located on the inner side of the connecting ring (6) and is clamped with the connecting ring (6), the first rubber-coated part (5) wraps the step structure (21) and forms a support at the bottom of the step structure (21), and the top of the connecting ring (6) is riveted to form a riveted part (601), and the riveted part (601) wraps the first rubber-coated part (5); A second rubber-coated part (4) is wrapped around the outside of the connecting ring (6), and a through hole is formed in the middle of the second rubber-coated part (4) for exposing the positive electrode column (3) and the negative electrode column (2), and the first rubber-coated part (5) is respectively engaged with the second rubber-coated part (4) and the step structure (21).

2. A battery cover assembly according to claim 1, characterized in that: Sealing rings (7) are provided at the bottoms of the positive pole (3) and the negative pole (2), and the sealing rings (7) are placed on the sink (102).

3. A battery cover assembly according to claim 2, characterized in that: The sink (102) is provided with an annular sealing groove (104), and the bottom of the sealing ring (7) is protruding downward to form a clamping portion (701), and the clamping portion (701) is clamped with the sealing groove (104).

4. The battery cover assembly according to claim 1, characterized in that: The step structure (21) has at least two first slots (211), and the inner side of the first rubber-coated component (5) has at least two clamping blocks (504) that are clamped with the first slots (211).

5. The battery cover assembly according to claim 1, characterized in that: The outer circumference of the first rubber-coated component (5) is protruded outward to form at least two anti-rotation parts (501), and the inner side surface of the connecting ring (6) has at least two grooves (103) that are engaged with the anti-rotation parts (501).

6. A battery cover assembly according to claim 5, characterized in that: The inner side of the second rubber-coated component (4) also has at least two clamping blocks (504), and the clamping blocks (504) are clamped with the groove (103).

7. The battery cover assembly according to claim 1, characterized in that: At least two second slots (503) and / or stop portions (502) are formed on the inner side of the first rubber-coated component (5), and at least two stop portions (502) and / or second slots (503) are formed on the inner side of the second rubber-coated component (4), and the stop portions (502) are engaged with the corresponding second slots (503).

8. The battery cover assembly according to claim 1, characterized in that: The bottom of the first rubber-coated component (5) is bent inward to form a support portion (505), and an accommodating groove for accommodating the step structure (21) is formed between the support portion (505) and the inner side surface of the first rubber-coated component (5).

9. The battery cover assembly according to claim 1, characterized in that: The middle area of the cover plate (1) is provided with an explosion-proof hole (105), and an explosion-proof membrane (9) is arranged in the explosion-proof hole (105).

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