Battery top cover and battery

Abstract

The utility model provides a battery top cover and a battery, and relates to the technical field of batteries. The insulating sheet is attached to the bottom surface of the top cover sheet; the pole column is connected with the top cover sheet, and one end of the pole column sequentially penetrates through the top cover sheet and the insulating sheet; the riveting block is arranged on one side, far away from the top cover sheet, of the insulating sheet, a riveting hole is formed in the riveting block, one end of the pole penetrates through the riveting hole and is riveted with the riveting block, the riveting block is connected with two layers of connecting sheets, and a tab of a battery cell is connected between the two layers of connecting sheets, so that the connection with the tab of the battery cell can be realized; compared with a laser welding mode, the riveting connection mode has the advantage that the cost is reduced in the manufacturing process.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and more specifically, relates to a battery top cover and a battery. Background Art

[0002] At present, in the existing battery structure, the pole column and the connecting piece located on the battery top cover are separate components. During the connection process of the pole column and the connecting piece, laser welding is required for connection. However, in the manufacturing process of the battery, the method of laser welding increases the manufacturing cost of the battery, which is not cost-effective. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a battery top cover and a battery for the deficiencies of the existing technology, so as to solve the problem that in the existing battery structure, the pole column and the connecting piece need to be connected by laser welding during the connection process. However, in the manufacturing process of the battery, the method of laser welding increases the manufacturing cost of the battery, which is not cost-effective as mentioned in the above background art.

[0004] In order to achieve the above purpose, the utility model provides a battery top cover, which includes:

[0005] A top cover sheet;

[0006] An insulating sheet, which is attached to the bottom surface of the top cover sheet;

[0007] A pole column, which is connected to the top cover sheet, and one end of the pole column sequentially penetrates through the top cover sheet and the insulating sheet;

[0008] A riveting block, which is arranged on the side of the insulating sheet away from the top cover sheet. The riveting block is provided with a riveting hole. One end of the pole column penetrates through the riveting hole and is riveted to the riveting block. Two layers of connecting pieces are connected to the riveting block, and the pole ears of the battery cells are connected between the two layers of connecting pieces.

[0009] Preferably, a recessed pre-bending part is provided on the connecting piece and close to the riveting block, and bending notches are provided on both sides of the pre-bending part.

[0010] Preferably, the top cover sheet is provided with a mounting hole, and the other end of the pole column is provided with a positioning block. One end of the pole column penetrates through the mounting hole, and the positioning block is arranged on the top surface of the top cover sheet.

[0011] Preferably, the battery top cover further includes an insulating block, which is provided with a through hole. The top surface of the top cover sheet is provided with a first groove, and the mounting hole is communicated with the first groove. The insulating block is embedded in the first groove, the positioning block is attached to the insulating block, and the pole column penetrates through the through hole.

[0012] Preferably, a second groove is provided on a surface of the insulating block away from the top cover sheet, and the positioning block is embedded in the second groove.

[0013] Preferably, the battery top cover further includes a sealing ring, the sealing ring is arranged in the mounting hole of the insulating sheet, and is respectively attached to the surfaces of the top cover sheet and the riveting block opposite to each other, and the sealing ring is sleeved on the pole column.

[0014] Preferably, the insulating sheet is a plastic insulating sheet, and the insulating block is a plastic insulating block.

[0015] Preferably, the connecting piece is a flexible connecting piece.

[0016] Preferably, the thickness of the connecting piece is 0.2 - 1.2 mm.

[0017] A battery, comprising:

[0018] A housing and an electric core, the electric core is arranged in the housing;

[0019] A battery top cover, the battery top cover is connected to the opening position of the housing, and the tab of the electric core is connected between two layers of the connecting pieces.

[0020] The present utility model provides a battery top cover and a battery, characterized in that: the pole column of the battery top cover is connected to the top cover sheet, and one end of the pole column sequentially penetrates through the top cover sheet and the insulating sheet, a riveting hole is provided on the riveting block, when one end of the pole column penetrates through the riveting hole, it can be riveted and connected to the riveting block, and two layers of connecting pieces are also connected to the riveting block, which can realize the connection with the tab of the electric core. The riveting connection method reduces the cost during the manufacturing process compared with the laser welding method.

[0021] Other features and advantages of the present utility model will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] By describing the exemplary embodiments of the present utility model in more detail in conjunction with the drawings, the above and other objects, features and advantages of the present utility model will become more obvious. Among them, in the exemplary embodiments of the present utility model, the same reference numerals generally represent the same components.

[0023] Figure 1 Shows an exploded structural schematic diagram of a battery top cover according to an embodiment of the present utility model;

[0024] Figure 2 Shows a bottom view structural schematic diagram of a battery top cover according to an embodiment of the present utility model;

[0025] Figure 3Shows a schematic structural diagram of a riveting block of a battery top cover according to an embodiment of the present invention;

[0026] Figure 4 Shows a schematic structural diagram when two connecting pieces of a battery top cover are separated according to an embodiment of the present invention.

[0027] Description of reference numerals:

[0028] 1. Top cover piece; 2. Insulating piece; 3. Terminal post; 4. Riveting block; 5. Connecting piece; 6. Pre-bending part; 7. Bending notch; 8. Positioning block; 9. Insulating block; 10. Sealing ring. Detailed implementation manners

[0029] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0030] As Figures 1 - 4 shown, the present invention provides a battery top cover, which includes:

[0031] Top cover piece 1;

[0032] Insulating piece 2, and the insulating piece 2 is attached to the bottom surface of the top cover piece 1;

[0033] Terminal post 3, the terminal post 3 is connected to the top cover piece 1, and one end of the terminal post 3 sequentially penetrates through the top cover piece 1 and the insulating piece 2;

[0034] Riveting block 4, the riveting block 4 is arranged on the side of the insulating piece 2 away from the top cover piece 1, a riveting hole is provided on the riveting block 4, one end of the terminal post 3 penetrates through the riveting hole and is riveted to the riveting block 4, and two layers of connecting pieces 5 are connected to the riveting block 4, and the two layers of connecting pieces 5 are used to connect the electrode tabs of the battery cell.

[0035] Specifically, to solve the problem that in the existing battery structure, the pole column and the connecting piece need to be connected by laser welding during the connection process. However, in the manufacturing process of the battery, the method of laser welding increases the manufacturing cost of the battery and is not cost-effective. The present utility model provides a battery top cover. The riveting block 4 and the two layers of connecting pieces 5 are integrally formed. The pole column 3 of the battery top cover is connected to the top cover piece 1, and one end of the pole column 3 sequentially penetrates through the top cover piece 1 and the insulating piece 2. A riveting hole is provided on the riveting block 4. When one end of the pole column 3 penetrates through the riveting hole, it can be riveted and connected to the riveting block 4. Two layers of connecting pieces 5 are also connected to the riveting block 4, which can realize the connection with the electrode tab of the battery cell. The riveting connection method compared with the laser welding method reduces the cost during the manufacturing process.

[0036] Preferably, a recessed pre-bending portion 6 is provided on the connecting piece 5 and near the riveting block 4, and bending notches 7 are provided on both sides of the pre-bending portion 6.

[0037] Specifically, the connecting piece 5 is a flexible connecting piece, and a recessed pre-bending portion 6 and bending notches 7 are provided on the connecting piece 5, which is convenient for bending the connecting piece 5 by 180 degrees to form a parallel state with the top cover piece 1, avoiding the connecting piece 5 occupying space;

[0038] When the electrode tab of the battery cell is located between the two layers of connecting pieces 5, it can be bent after ultrasonic welding.

[0039] Preferably, mounting holes are provided on the top cover piece 1, positioning blocks 8 are provided at the other end of the pole column 3, one end of the pole column 3 penetrates through the mounting holes, and the positioning blocks 8 are arranged on the top surface of the top cover piece 1.

[0040] The battery top cover further includes an insulating block 9. A through hole is provided on the insulating block 9. A first groove is provided on the top surface of the top cover piece 1. The mounting hole is communicated with the first groove. The insulating block 9 is embedded in the first groove, the positioning block 8 is attached to the insulating block 9, and the pole column 3 penetrates through the through hole;

[0041] A second groove is provided on the surface of the insulating block 9 away from the top cover piece 1, and the positioning block 8 is embedded in the second groove.

[0042] Specifically, both the first groove and the second groove are square. The square first groove and the square second groove are respectively used for positioning and installing the insulating block 9 and the positioning block 8.

[0043] Preferably, the battery top cover further includes a sealing ring 10. The sealing ring 10 is arranged in the mounting hole of the insulating piece 2 and is respectively attached to the opposite surfaces of the top cover piece 2 and the riveting block 4. The sealing ring 10 is sleeved on the pole column 3.

[0044] Specifically, the sealing ring 10 can prevent the electrolyte in the battery from leaking.

[0045] Preferably, the insulating sheet 2 is a plastic insulating sheet, and the insulating block 9 is a plastic insulating block.

[0046] Specifically, the plastic insulating sheet and the plastic insulating block have good insulating properties.

[0047] Preferably, the thickness of the connecting sheet 5 is 0.2 - 1.2 mm.

[0048] Specifically, the thickness of the connecting sheet 5 is preferably 0.2 - 1.2 mm, which is reduced compared to the thickness during welding connection. Furthermore, the occupation of the internal space of the battery is reduced, thereby increasing the capacity of the battery cell and achieving the effect of increasing the energy density of the battery.

[0049] Preferably, the number of the pole columns 3 and the riveting blocks 4 is two each. The two pole columns 3 are the positive pole column and the negative pole column respectively. One end of the positive pole column and one end of the negative pole column are respectively riveted and connected to the two riveting blocks 4.

[0050] Specifically, the positive pole column riveted together with one riveting block 4 is made of aluminum material, and the negative pole column riveted together with the other riveting block 4 is made of aluminum material and copper material respectively.

[0051] A battery, comprising:

[0052] A housing and a battery cell, the battery cell being disposed within the housing;

[0053] A battery top cover, the battery top cover being connected to the opening position of the housing, and the tab of the battery cell being connected between two connecting sheets 5.

[0054] In summary, when the battery top cover provided by the present utility model is applied to a battery, one end of the pole column 3 can be riveted and connected to the riveting block 4. Two connecting sheets 5 are further connected to the riveting block 4, enabling connection with the tab of the battery cell. The riveting connection method reduces the cost during the manufacturing process compared to the laser welding method. At the same time, the connecting sheet 5 is no longer restricted by welding, and its thickness can be reduced. Furthermore, the occupation of the internal space of the battery is reduced, thereby increasing the capacity of the battery cell and achieving the effect of increasing the energy density of the battery.

[0055] The above has described the embodiments of the present utility model. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A battery top cover, characterized in that, The battery top cover includes: A top cover sheet; An insulating sheet, which is attached to the bottom surface of the top cover sheet; A pole column, which is connected to the top cover sheet, and one end of the pole column sequentially penetrates through the top cover sheet and the insulating sheet; A riveting block, which is arranged on the side of the insulating sheet away from the top cover sheet. The riveting block is provided with a riveting hole. One end of the pole column penetrates through the riveting hole and is riveted to the riveting block. Two connecting sheets are connected to the riveting block, and the pole ears of the battery cell are connected between the two connecting sheets.

2. The battery top cover according to claim 1, wherein, A recessed pre-bending portion is provided on the connecting sheet and near the riveting block, and bending notches are provided on both sides of the pre-bending portion.

3. A battery top cover according to claim 1, characterized in that, An installation hole is provided on the top cover sheet, a positioning block is provided at the other end of the pole column, one end of the pole column penetrates through the installation hole, and the positioning block is arranged on the top surface of the top cover sheet.

4. A battery top cover according to claim 3, characterized in that, The battery top cover further includes an insulating block, which is provided with a through hole. A first groove is provided on the top surface of the top cover sheet, the installation hole is communicated with the first groove, the insulating block is embedded in the first groove, the positioning block is attached to the insulating block, and the pole column penetrates through the through hole.

5. A battery top cover according to claim 4, characterized in that A second groove is provided on the surface of the insulating block away from the top cover sheet, and the positioning block is embedded in the second groove.

6. The battery top cover according to claim 3, characterized in that, The battery top cover further includes a sealing ring, which is arranged in the installation hole of the insulating sheet and is respectively attached to the opposite surfaces of the top cover sheet and the riveting block. The sealing ring is sleeved on the pole column.

7. A battery top cover according to claim 4, characterized in that, The insulating sheet is a plastic insulating sheet, and the insulating block is a plastic insulating block.

8. A battery top cover according to claim 1, characterized in that The connecting sheet is a flexible connecting sheet.

9. A battery top cover according to claim 1, characterized in that, The thickness of the connecting sheet is 0.2 - 1.2 mm.

10. A battery, characterized in that, Including: A housing and a battery cell, and the battery cell is arranged in the housing; A battery top cover according to any one of claims 1 - 9, the battery top cover is connected to the opening position of the housing, and the pole ears of the battery cell are connected between the two connecting sheets.

Images