A battery cover terminal structure and its production process

Abstract

The present invention discloses a battery cover plate terminal structure and a production process thereof, wherein the battery cover plate terminal structure includes a substrate, wherein both ends of the substrate are provided with connection holes, a positive terminal assembly is provided at the connection hole at one end of the substrate, and a negative terminal assembly is provided at the connection hole at the other end, wherein the positive terminal assembly and the negative terminal assembly have the same structure, and both the positive terminal assembly and the negative terminal assembly include a buckle, wherein two buckles are connected at corresponding connection holes, wherein the bottom end surface of the buckle is flush with the bottom end surface of the substrate, and the bottom inner rings of the two buckles are provided with a shrinking ring. The shrinking ring produced by riveting the bottom of the buckle of the present invention plays the role of supporting the electrode column, and the connection can be achieved without the copper end of the bottom of the electrode column passing through the buckle, thereby reducing the size of the copper end of the bottom of the electrode column, that is, reducing the amount of copper material used, thereby reducing the overall processing cost.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery cover terminal structure and a production process thereof. Background Art

[0002] The new energy battery industry is currently developing rapidly. As the country vigorously develops the industry, major domestic battery manufacturers are vigorously promoting battery production capacity. Due to the shortage and high cost of raw materials and the huge market demand for new energy, battery manufacturers are constantly breaking through new technologies while increasing production capacity and output, especially breakthroughs in battery terminal-related technologies.

[0003] Figure 7 The existing battery cover terminal assembly has the following shortcomings: the connecting ring in the existing battery cover terminal assembly is equivalent to the connecting shell of the battery terminal, which is a simple ring structure. When connected to the electrode column, the bottom of the electrode column needs to pass through the connecting ring, and the size of the electrode column needs to be adapted to the connecting ring, so the size of the electrode column is larger. In addition, since the bottom of the electrode column is a copper end, copper material is relatively expensive compared to aluminum material, etc., which results in a high production cost of the battery terminal. Summary of the Invention

[0004] In order to overcome the above technical problems, an object of the present invention is to provide a battery cover terminal structure and a production process thereof.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A battery cover terminal structure, comprising a substrate, both ends of the substrate are provided with connection holes, a positive terminal assembly is provided at the connection hole at one end of the substrate, and a negative terminal assembly is provided at the connection hole at the other end, the positive terminal assembly and the negative terminal assembly have the same structure, the positive terminal assembly and the negative terminal assembly both comprise buckles, two buckles are connected at corresponding connection holes, the bottom end faces of the buckles are flush with the bottom end face of the substrate, the bottom inner rings of the two buckles are both provided with shrinking rings, the shrinking rings are provided with sealing rings, an electrode column is provided in the buckle ring, the electrode column A boss is circumferentially provided at the bottom end, and the boss is fitted on the sealing ring. A plastic insulating gasket is provided in the buckle, and the boss and the sealing ring are both fitted with the inner ring side wall of the plastic insulating gasket, and the outer ring side wall of the plastic insulating gasket is fitted on the inner wall of the buckle; a stainless steel gasket is provided on the top of the plastic insulating gasket; the top of the electrode column of the positive terminal assembly is sleeved with a positive weak conductive end cover, and the top of the electrode column of the negative terminal assembly is sleeved with a negative insulating end cover, and the positive weak conductive end cover and the negative insulating end cover are wrapped in the upper half of the corresponding buckle.

[0007] As a further solution of the present invention: the buckle and the base plate are both made of aluminum.

[0008] As a further solution of the present invention: the positive electrode weakly conductive end cover and the negative electrode insulating end cover are both integrally connected to the corresponding buckle by plastic injection molding.

[0009] As a further solution of the present invention: the outer diameter of the sealing ring is smaller than the inner diameter of the retaining ring.

[0010] As a further solution of the present invention: the top inner ring of the plastic insulating gasket is provided with an inner folding edge, the inner ring of the inner folding edge is connected to a convex ring, the inner ring of the convex ring is fitted with the electrode column, and the stainless steel gasket is fitted on the inner folding edge.

[0011] As a further solution of the present invention: the bottom of the positive weakly conductive end cover and the negative insulating end cover are circumferentially provided with a plurality of convex top blocks, and each of the convex top blocks abuts against the corresponding stainless steel gasket.

[0012] As a further solution of the present invention: a mounting hole is provided on the substrate, and a battery explosion-proof valve is installed in the mounting hole.

[0013] A production process for producing the above-mentioned battery cover terminal structure, the specific steps are as follows:

[0014] Step 1: Processing and manufacturing substrate;

[0015] Step 2: Assemble the positive terminal assembly. The specific steps are as follows:

[0016] S1. Produce sealing rings and plastic insulating gaskets by injection molding, stamp and produce stainless steel gaskets, and prefabricate the positive electrode column;

[0017] S2, production and processing of buckles;

[0018] S3. Place the sealing ring, the positive electrode column, the plastic insulating gasket and the stainless steel gasket on the buckle in sequence, and perform shrinking riveting. A shrinking ring is formed at the bottom of the buckle to obtain a semi-finished positive terminal assembly;

[0019] S4. Injection-molding the semi-finished positive terminal assembly obtained by riveting in S3 as a whole, and wrapping the injection-molded positive weak conductive end cap around the outside of the upper half of the buckle to obtain a finished positive terminal assembly;

[0020] Step 3: The semi-finished product of the negative terminal assembly is processed and assembled in the same manner as in step 2, and then integrally injection molded. The negative electrode insulating end cap produced by the injection molding is wrapped around the upper half of the corresponding buckle to obtain the finished product of the negative terminal assembly;

[0021] Step 4: Weld the positive terminal assembly and the negative terminal assembly to the corresponding connection holes of the base plate respectively.

[0022] Beneficial effects of the present invention:

[0023] 1. The shrinking ring provided at the bottom of the buckle of the present invention is produced during the shrinking riveting process and plays the role of supporting the electrode column. The connection can be achieved without the copper end of the bottom of the electrode column passing through the buckle. This can reduce the size of the copper end of the bottom of the electrode column, that is, reduce the amount of copper material, thereby reducing the overall processing cost.

[0024] 2. The positive terminal assembly and the negative terminal assembly of the present invention can be riveted and fixed at one time after being assembled together, avoiding multiple riveting or welding processes during assembly, which increases the probability of component damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the overall explosion structure of the present invention;

[0028] Figure 3 It is a structural diagram of the buckle in the present invention;

[0029] Figure 4 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0030] Figure 5 yes Figure 4 Schematic diagram of the enlarged structure at A in the middle;

[0031] Figure 6 It is a structural schematic diagram of the plastic insulating gasket in the present invention;

[0032] Figure 7 It is a structural diagram of an existing battery cover terminal assembly.

[0033] In the figure: 1. Base plate; 2. Positive terminal assembly; 3. Negative terminal assembly; 4. Retaining ring; 5. Sealing ring; 6. Electrode column; 7. Boss; 8. Plastic insulating gasket; 9. Stainless steel gasket; 10. Positive weak conductive end cap; 11. Connecting hole; 12. Mounting hole; 13. Battery explosion-proof valve; 14. Shrinking ring; 15. Connecting cover; 16. Positive terminal assembly; 17. Negative terminal assembly; 18. Connecting ring; 19. Electrode column; 20. Convex top block; 21. Convex ring; 22. Inner folding edge; 23. Negative insulating end cap. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] like Figure 7 As shown, the existing battery cover terminal assembly includes a connecting cover 15, one end of the connecting cover 15 is connected to the positive terminal assembly 16, and the other end is connected to the negative terminal assembly 17. The positive terminal assembly 16 and the negative terminal assembly 17 both include connecting rings 18, and the connecting rings 18 are welded to the corresponding positions of the connecting cover 15. Electrode columns 19 of suitable sizes are connected to the two connecting rings 18, and the connecting rings 18 are welded to the electrode columns 19. The top of the electrode column 19 is an aluminum metal end and the bottom is a copper metal end.

[0036] like Figures 1-6As shown, a battery cover terminal structure includes a substrate 1, and connection holes 11 are opened at both ends of the substrate 1. A positive terminal assembly 2 is provided at the connection hole 11 at one end of the substrate 1, and a negative terminal assembly 3 is provided at the connection hole 11 at the other end. The positive terminal assembly 2 and the negative terminal assembly 3 have the same structure. The positive terminal assembly 2 and the negative terminal assembly 3 both include a buckle 4. The buckle 4 and the substrate 1 are both aluminum parts and the buckle 4 is welded to the corresponding connection hole 11. After welding, the bottom end surface of the buckle 4 is flush with the bottom end surface of the substrate 1. The inner rings of the bottom ends of the two buckles 4 are both provided with a shrinking ring 14. A sealing ring 5 is placed on the shrinking ring 14. The outer diameter of the sealing ring 5 is smaller than The inner diameter of the retaining ring 4 is provided with an electrode column 6, the top of the electrode column 6 is an aluminum end, and the bottom is a copper end, that is, the electrode column 6 is made of a copper-aluminum composite material, and the electrode column 6 of the positive terminal assembly 2 is a positive electrode column, and the electrode column 6 of the negative terminal assembly 3 is a negative electrode column. A boss 7 is circumferentially provided on the bottom edge of the electrode column 6, and the boss 7 contacts the upper side of the sealing ring 5. A plastic insulating gasket 8 is provided in the retaining ring 4, and the boss 7 and the sealing ring 5 are both fitted with the inner ring side wall of the plastic insulating gasket 8, and the outer ring side wall of the plastic insulating gasket 8 is fitted on the inner wall of the retaining ring 4. The plastic insulating gasket 8 is used to fill the space between the boss 7 and the inner wall of the retaining ring 4. The gap ensures that the boss 7 and the buckle 4 remain relatively stable during assembly, and also ensures that the electrode column 6 and the buckle 4 are relatively stable, so as to facilitate subsequent fixation; the top inner ring of the plastic insulating gasket 8 is provided with an inner folding edge 22, and the inner ring of the inner folding edge 22 is connected with a convex ring 21, and the inner ring of the convex ring 21 contacts the electrode column 6, and the top of the plastic insulating gasket 8 is provided with a stainless steel gasket 9, which fits on the inner folding edge 22. The inner folding edge 22 and the convex ring 21 provided on the top of the plastic insulating gasket 8 facilitate the installation of the stainless steel gasket 9, and the convex ring 21 also facilitates the plastic insulating gasket 8 to be firmly sleeved on the electrode column 6; the electrode machine of the positive terminal assembly 2 The top of the column 6 is sleeved with a positive weakly conductive end cap 10, and the outer ring of the positive weakly conductive end cap 10 is bent and wrapped around the upper half of the buckle 4. The top of the electrode column 6 of the negative terminal assembly 3 is sleeved with a negative insulating end cap 23, and the outer ring of the negative insulating end cap 23 is also bent and wrapped around the upper half of the buckle 4. The positive weakly conductive end cap 10 and the negative insulating end cap 23 are both integrally connected to the corresponding buckle 4 by plastic injection molding. The bottom of the positive weakly conductive end cap 10 and the negative insulating end cap 23 are circumferentially provided with a plurality of convex top blocks 20, each of which is in contact with the stainless steel gasket 9. The convex top blocks 20 are used to ensure that the stainless steel gasket 9 is stable;

[0037] The substrate 1 is provided with a mounting hole 12, in which a battery explosion-proof valve 13 is installed. When the internal pressure of the battery installed on the substrate 1 is too high, the battery explosion-proof valve 13 is easily broken by the pressure to release the pressure, thereby preventing the battery from exploding.

[0038] A production process for producing the above-mentioned battery cover terminal structure, the specific steps are as follows:

[0039] Step 1: Prepare the cutting equipment and punching equipment, then select an aluminum plate of corresponding thickness, and then fix it on the cutting equipment, then cut the selected aluminum plate to obtain the shape of the substrate 1, and then fix the obtained substrate 1 on the punching equipment, punch out two connecting holes 11 on the substrate 1, and replace the punching end of the punching equipment, and then punch out the mounting hole 12 on the substrate 1, so as to obtain the completed substrate 1;

[0040] Step 2: First, assemble the positive terminal assembly 2. The specific steps are as follows:

[0041] S1. Prepare two injection molding machines and two corresponding injection molds, and then process and produce the sealing ring 5 and the plastic insulating gasket 8 respectively. Prepare the stamping equipment to stamp and produce the stainless steel gasket 9, and prefabricate the positive electrode column 6.

[0042] S2, preparing a second casting mold for the buckle 4, and casting the bottom buckle 4 through the second casting mold for the buckle 4;

[0043] S3. Prepare the riveting equipment, then place the produced sealing ring 5 into the buckle 4, then install the positive electrode machine column 6, then fit the plastic insulating gasket 8 between the positive electrode machine column 6 and the buckle 4, then overlap the stainless steel gasket 9 on the inner folded edge 22 on the plastic insulating gasket 8, and then use the riveting equipment to shrink the assembled components so that the bottom inner ring of the buckle 4 forms a shrinking ring 14. The shrinking ring 14 is blocked at the bottom to prevent the assembly from falling off, and thus a semi-finished product of the positive terminal assembly 2 is obtained;

[0044] S4. Prepare a plastic overmolding injection molding machine, and process the top of the semi-finished product of the positive terminal assembly 2 obtained in S3 by the plastic overmolding injection molding machine, that is, process the positive electrode weak conductive end cap 10 to wrap the upper half of the semi-finished product of the positive terminal assembly 2, thereby obtaining a finished product of the positive terminal assembly 2;

[0045] Step 3: The negative terminal assembly 3 is processed and assembled in the same manner as in step 2, and then the negative electrode insulating end cap 23 is processed by the overmolding machine and wrapped around the upper half of the negative terminal assembly 3 to obtain the finished negative terminal assembly 3;

[0046] Step 4: Prepare the laser welding equipment, and then weld the positive terminal assembly 2 and the negative terminal assembly 3 to the corresponding connection holes 11 of the substrate 1 through the laser welding equipment to obtain the finished battery terminals.

[0047] The electrode column 6 of the positive terminal assembly 2 and the negative terminal assembly 3 of the battery terminal obtained by the above production and processing obtains a shrinking ring 14 during the shrinking riveting process, and relies on the shrinking ring 14 for support at the bottom. Therefore, there is no need for the bottom end of the electrode column 6 to pass through the buckle 4 to complete the subsequent assembly and fixation. Moreover, since the bottom end of the electrode column 6 is a copper end, the use of copper material at the bottom end of the electrode column 6 can be reduced during the production, thereby reducing material costs. Therefore, compared with the existing battery terminals, the improved present invention has obvious advantages.

[0048] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A battery cover terminal structure, comprising a substrate (1), wherein both ends of the substrate (1) are provided with connection holes (11), a positive terminal assembly (2) is provided at the connection hole (11) at one end of the substrate (1), and a negative terminal assembly (3) is provided at the connection hole (11) at the other end of the substrate (1), wherein the positive terminal assembly (2) and the negative terminal assembly (3) have the same structure, and are characterized in that: The positive terminal assembly (2) and the negative terminal assembly (3) both include a buckle (4), the two buckle rings (4) are connected to the corresponding connection holes (11), the bottom end surface of the buckle (4) is flush with the bottom end surface of the substrate (1), the bottom inner rings of the two buckle rings (4) are both provided with a shrinking ring (14), the shrinking ring (14) is provided with a sealing ring (5), the buckle (4) is provided with an electrode column (6), the bottom end of the electrode column (6) is circumferentially provided with a boss (7), the boss (7) is attached to the sealing ring (5), the buckle (4) is provided with a plastic insulating gasket (8), the The boss (7) and the sealing ring (5) are both fitted with the inner ring side wall of the plastic insulating gasket (8), and the outer ring side wall of the plastic insulating gasket (8) is fitted on the inner wall of the buckle (4); a stainless steel gasket (9) is provided on the top of the plastic insulating gasket (8); a positive weak conductive end cap (10) is sleeved on the top of the electrode column (6) of the positive terminal assembly (2), and a negative insulating end cap (23) is sleeved on the top of the electrode column (6) of the negative terminal assembly (3); the positive weak conductive end cap (10) and the negative insulating end cap (23) are wrapped around the upper half of the corresponding buckle (4); The buckle (4) and the base plate (1) are both made of aluminum; The positive electrode weakly conductive end cap (10) and the negative electrode insulating end cap (23) are both integrally connected to the corresponding buckle (4) by plastic injection molding.

2. A battery cover terminal structure according to claim 1, characterized in that: The outer diameter of the sealing ring (5) is smaller than the inner diameter of the buckle (4).

3. The battery cover terminal structure according to claim 1, characterized in that: The top inner ring of the plastic insulating gasket (8) is provided with an inner folding edge (22), the inner ring of the inner folding edge (22) is connected to a convex ring (21), the inner ring of the convex ring (21) is fitted with the electrode column (6), and the stainless steel gasket (9) is fitted on the inner folding edge (22).

4. The battery cover terminal structure according to claim 1, characterized in that: The bottoms of the positive electrode weakly conductive end cover (10) and the negative electrode insulating end cover (23) are both circumferentially provided with a plurality of convex top blocks (20), and each of the convex top blocks (20) abuts against the stainless steel gasket (9).

5. The battery cover terminal structure according to claim 1, characterized in that: A mounting hole (12) is provided on the base plate (1), and a battery explosion-proof valve (13) is installed in the mounting hole (12).

6. A production process for a battery cover terminal structure, used for processing and producing the battery cover terminal structure according to claim 1, characterized in that: The specific steps are as follows: Step 1: Processing and manufacturing a substrate (1); Step 2: Assemble the positive terminal assembly (2). The specific steps are as follows: S1, producing a sealing ring (5) and a plastic insulating gasket (8) by injection molding, and producing a stainless steel gasket (9) by stamping, and prefabricating a positive electrode column (6); S2, producing and processing buckles (4); S3, placing the sealing ring (5), the positive electrode column (6), the plastic insulating gasket (8) and the stainless steel gasket (9) on the buckle (4) in sequence, and performing shrinking riveting processing, and a shrinking ring (14) is produced at the bottom of the buckle (4), thereby obtaining a semi-finished product of the positive terminal assembly (2); S4; integrally injecting the semi-finished positive terminal assembly (2) obtained by riveting in S3, and wrapping the injection-molded positive weak conductive end cap (10) around the outer portion of the upper half of the buckle (4) to obtain a finished positive terminal assembly (2); Step 3: The semi-finished product of the negative terminal assembly (3) is processed and assembled in the same manner as in step 2, and then integrally injection molded. The negative insulating end cap (23) obtained by injection molding is wrapped around the upper half of the corresponding buckle (4) to obtain the finished product of the negative terminal assembly (3); Step 4: Weld the positive terminal assembly (2) and the negative terminal assembly (3) to the corresponding connection holes (11) of the substrate (1) respectively.

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