Cover plate structure of blade battery and blade battery thereof

Abstract

The utility model provides a blade battery cover plate structure and a blade battery thereof, and the blade battery cover plate structure is characterized in that the blade battery cover plate structure comprises a cover plate assembly which is divided into a positive electrode cover plate piece and a negative electrode cover plate piece; the positive electrode cover plate and the negative electrode cover plate have the same structure and are sequentially composed of a terminal, an upper plastic, an aluminum cover sheet, a lower plastic and a pole from top to bottom, the lower end of the pole is provided with an integrally formed bottom plate, and a sealing ring is arranged between the lower plastic and the pole. The cover plate assembly is divided into the independent positive electrode cover plate piece and the independent negative electrode cover plate piece, and the pole adopts the integrally formed bottom plate, so that the welding process steps are reduced, the positive pole and the negative pole are independently welded, and the overall yield is improved.

Description

Technical Field

[0001] The utility model relates to a cover plate structure of a blade battery and the blade battery. Background Art

[0002] The existing blade battery cover adopts a bipolar column design in order to improve the tensile and torsional strength of the product and ensure product overcurrent. The bottom of the column is welded to the base plate, and the top of the column is riveted to the terminal and then welded. The conventional blade battery structure has positive and negative poles. The conventional column is the column and the base plate is the base plate.

[0003] For example, the Chinese utility model patent entitled "Pole, Top Cover Structure, Battery, Battery Module, and Battery Pack," with application number 202321090677.X, features a first metal post and a second metal post connected to each other. The first metal post has a cold-forging groove at one end and a raised portion at the other end. The second metal post has a recessed portion, the raised portion being embedded in the recessed portion to form a cold-forging joint. The recessed portion is recessed along the cold-forging groove toward the raised portion. The splitting of the pole into the first and second metal posts adds an additional manufacturing process and increases costs.

[0004] The negative electrode of the battery cover is generally connected to the core copper foil with copper material, and the terminal is welded with aluminum and bar sheet.

[0005] The negative copper pole and the aluminum terminal are welded together, which has unreliable strength and is difficult to weld. Riveting followed by welding is usually used to ensure this. Therefore, the process is bipolar pole riveting + bipolar pole welding. There are many welding steps, and the welding cost is relatively high. Utility Model Content

[0006] The purpose of the present utility model is to address the above-mentioned problems in the existing technology and propose a cover plate structure of a blade battery and a blade battery thereof, which divides the cover plate assembly into separate positive cover plate parts and negative cover plate parts, and the pole and the base plate are integrally formed (that is, directly manufactured through a mold), reducing the welding process steps, and the positive pole and negative pole are welded separately, thereby improving the overall yield.

[0007] The purpose of the utility model can be achieved through the following technical solutions: A cover structure of a blade battery, characterized in that it includes:

[0008] A cover plate assembly, which is divided into a positive cover plate component and a negative cover plate component;

[0009] The positive electrode cover plate has the same structure as the negative electrode cover plate and is composed of a terminal, an upper plastic, an aluminum cover plate, a lower plastic and a pole from top to bottom. The lower end of the pole has an integrally formed bottom plate, and a sealing ring is installed between the lower plastic and the pole.

[0010] Furthermore, the upper end of the pole has a runway-shaped riveted end and the connection between the riveted end and the pole is arranged in a step-like manner. A concave hole is provided on the pole, and the pole includes a positive pole and a negative pole.

[0011] Furthermore, the terminal upper cover is provided with a rivet hole, and the shape of the rivet hole corresponds to that of the rivet end, and the rivet hole is slightly larger than the rivet end.

[0012] Furthermore, the upper plastic has an installation groove for installing the terminal, and a first hole is opened in the middle of the installation groove.

[0013] Furthermore, a positioning groove for positioning the upper plastic is opened on one side of the aluminum cover, and a fixing groove is opened on the other side with an explosion-proof valve installed in the fixing groove. A second hole is opened in the middle of the positioning groove, and an explosion-proof valve film is provided above the explosion-proof valve.

[0014] Furthermore, a third hole is formed on the lower plastic.

[0015] Furthermore, the first hole, the second hole, and the third hole correspond to each other and are for the pole to pass through. The sealing ring is sleeved on the pole and the connection between the sealing ring and the lower plastic is stepped.

[0016] Furthermore, a detection groove is provided on the side surface of the bottom plate.

[0017] Furthermore, as another solution, the upper end of the negative electrode column is a cylindrical negative electrode forming end, and the rivet hole corresponds to the shape of the negative electrode forming end.

[0018] Furthermore, a blade battery is provided, which includes an aluminum shell with a square cross-section, wherein a positive electrode cover plate is installed at one end of the aluminum shell and a negative electrode cover plate is installed at the other end.

[0019] Compared with the prior art, the advantages of this application are:

[0020] 1. It divides the cover plate assembly into separate positive cover plate parts and negative cover plate parts, and the pole adopts an integrally formed base plate, which is directly manufactured through a mold, reducing the welding process steps. The positive pole and negative pole are welded separately, and the integrated pole and base plate design is used to reduce the number of parts, so that the two seals of the traditional battery cover are optimized into one seal to improve the overall yield.

[0021] 2. The riveted end of the pole adopts a runway type, which ensures anti-torsion, increases the cross-sectional area and ensures the current capacity.

[0022] 3. The second solution for the negative electrode column is that the negative electrode forming end is cylindrical, which ensures that it is easy to rivet and expands evenly around.

[0023] 4. A detection groove is set on the side of the bottom plate of the pole to ensure that the product can be eliminated during the sealing test when the sealing ring is in use.

[0024] 5. The riveted end and the pole itself are arranged in a stepped manner, so that the riveted expansion reaction is more likely to occur at the top.

[0025] 6. A concave hole is provided on the top of the pole, which makes it easier to expand to the surroundings during riveting and reduces the volume of material pressed toward the middle of the pole during riveting. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the positive electrode structure;

[0027] Figure 2 It is a schematic diagram of the explosion of the positive electrode structure;

[0028] Figure 3 is a schematic cross-sectional view of the positive electrode structure;

[0029] Figure 4 1 is a schematic diagram of a first embodiment of a negative electrode structure;

[0030] Figure 5 1 is a schematic diagram of a second embodiment of a negative electrode structure;

[0031] Figure 6 This is an exploded diagram of the second embodiment of the negative electrode structure;

[0032] Figure 7 is a cross-sectional schematic diagram of a second embodiment of a negative electrode structure;

[0033] Figure 8 is a schematic diagram of the detection groove;

[0034] Figure 9 This is a schematic diagram of a blade battery;

[0035] In the figure, 1. terminal; 101. aluminum shell; 102. positive electrode cover plate; 103. negative electrode cover plate; 11. rivet hole; 2. upper plastic; 21. mounting groove; 22. first hole; 3. aluminum cover; 31. positioning groove; 32. second hole; 33. fixing hole; 4. sealing ring; 5. lower plastic; 51. third hole; 6. positive electrode column; 61. rivet end; 62. detection groove; 63. bottom plate; 64. concave hole; 7. explosion-proof valve film; 8. explosion-proof valve; 9. negative electrode column; 91. negative electrode forming end. DETAILED DESCRIPTION

[0036] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention.

[0037] Example 1

[0038] like Figure 1 、 2 , 3, 4, and 8, a cover plate structure of a blade battery, characterized in that it includes:

[0039] The cover plate assembly is divided into a positive electrode cover plate 102 and a negative electrode cover plate 103;

[0040] The positive electrode cover plate 102 has the same structure as the negative electrode cover plate 103 and is composed of a terminal 1, an upper plastic 2, an aluminum cover plate 3, a lower plastic 5 and a pole from top to bottom. The lower end of the pole has an integrally formed bottom plate 63, and a sealing ring 4 is installed between the lower plastic 5 and the pole.

[0041] The cover plate assembly is divided into a separate positive cover plate 102 and a negative cover plate 103, and the pole adopts an integrally formed base plate 63, which reduces the welding process steps. The positive pole 6 and the negative pole 9 are welded separately. The design of an integrated pole and base plate 63 reduces the number of parts and optimizes the two seals of the traditional battery cover into one seal to improve the overall yield.

[0042] The pole and the bottom plate 63 are formed as one piece by cold heading process.

[0043] Furthermore, the upper end of the pole has a runway-shaped riveted end 61, and the lower portion of the riveted end 61 where it connects to the pole is stepped. The pole is provided with a recessed hole 64. The pole includes a positive pole 6 and a negative pole 9. The stepped arrangement makes the expansion reaction more likely to occur at the top.

[0044] The middle part of the runway-shaped riveted end 61 is a pre-riveted hole, which can make it easier for the material in the riveting to flow to both sides and hang the terminal 1 to ensure strength.

[0045] Furthermore, the upper cover of the terminal 1 is provided with a rivet hole 11 , and the shape of the rivet hole 11 corresponds to that of the rivet end 61 .

[0046] Furthermore, the upper plastic 2 has a mounting groove 21 for mounting the terminal 1 , and a first hole 22 is formed in the middle of the mounting groove 21 .

[0047] Furthermore, a positioning groove 31 for positioning the upper plastic 2 is opened on one side of the aluminum cover 3, and a fixing groove 33 is opened on the other side, and an explosion-proof valve 8 is installed in the fixing groove 33. A second hole 32 is opened in the middle of the positioning groove 31, and an explosion-proof valve film 7 is provided above the explosion-proof valve 8.

[0048] Furthermore, a third hole 51 is formed on the lower plastic 5 .

[0049] Furthermore, the first hole 22, the second hole 32, and the third hole 51 correspond to each other and are for the pole to pass through. The sealing ring 4 is mounted on the pole and the connection between the sealing ring 4 and the lower plastic 5 is stepped. The stepped arrangement allows the sealing ring 4 to be squeezed and enhance the sealing performance after welding.

[0050] Furthermore, the riveting hole 11 is slightly larger than the riveting end 61 .

[0051] Furthermore, a detection groove 62 is provided on the side of the bottom plate 63. The detection groove 62 is provided on the side of the bottom plate 63 of the pole to ensure that the product can be eliminated when the sealing ring 4 is prevented from leaking.

[0052] The positive electrode cover plate 102 has the same overall structure as the negative electrode cover plate 103. The installation method is from top to bottom, namely, the terminal 1, the upper plastic 2, the aluminum cover plate 3, the lower plastic 5, the sealing ring 4 and the pole. The terminal 1 is installed in the installation groove 21 of the upper plastic 2, the lower part of the upper plastic 2 is positioned on the positioning groove 31, the sealing ring 4 is sleeved on the pole and then passes through the lower plastic 5 to connect with the above components. The pole passes through the third hole 51 of the lower plastic 5, the second hole 32 of the aluminum cover plate 3 and the first hole 22 of the upper plastic 2 one by one, thereby completing the installation and then performing the welding process.

[0053] In the present application, the positive electrode cover 102 is made of pure aluminum and the positive electrode column 6 and the terminal 1 are welded together to ensure their strength and overcurrent.

[0054] The negative electrode cover 103 is made of pure copper and the negative electrode column 9 is riveted to the terminal 1 and welded with copper and aluminum to ensure its strength and overcurrent.

[0055] Further, such as Figure 9 As shown, it is a blade battery, which includes an aluminum shell 101 with a square cross-section, a positive electrode cover plate 102 is installed at one end of the aluminum shell 101, and a negative electrode cover plate 103 is installed at the other end.

[0056] Example 2

[0057] like Figure 5-8 As shown, further, as another solution, the upper end of the negative electrode column 9 is a cylindrical negative electrode forming end 91 , and the rivet hole 11 corresponds to the shape of the negative electrode forming end 91 .

[0058] The positive electrode cover plate 102 has the same structure as the negative electrode cover plate 103 and is composed of a terminal 1, an upper plastic 2, an aluminum cover plate 3, a lower plastic 5 and a pole from top to bottom. The lower end of the pole has an integrally formed bottom plate 63, and a sealing ring 4 is installed between the lower plastic 5 and the pole.

[0059] In the second embodiment, the negative electrode forming end 91 of the negative electrode column 9 is set to be cylindrical, so as to ensure that it is easy to rivet and expands evenly on all sides.

[0060] The technical solution of the above-mentioned utility model provides a solution that is significantly different from the existing technology to address the technical problem that the existing technology solution is too single. The parts not involved in the technical solution of this application are the same as the existing technology or can be implemented by using the existing technology, and will not be repeated here.

[0061] The technical solutions in the above embodiments have clearly and completely described the contents of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

Claims

1. A blade battery cover structure, characterized in that: It includes: A cover plate assembly, which is divided into a positive cover plate component and a negative cover plate component; The positive electrode cover plate has the same structure as the negative electrode cover plate and is composed of a terminal, an upper plastic, an aluminum cover plate, a lower plastic and a pole from top to bottom. The lower end of the pole has an integrally formed bottom plate, and a sealing ring is installed between the lower plastic and the pole.

2. The cover plate structure of a blade battery according to claim 1, characterized in that: The upper end of the pole has a runway-shaped riveted end and the connection between the riveted end and the pole is arranged in a step-like manner. A concave hole is provided on the pole, and the pole includes a positive pole and a negative pole.

3. The cover plate structure of a blade battery according to claim 2, characterized in that: The terminal upper cover is provided with a rivet hole, and the shape of the rivet hole corresponds to that of the rivet end, and the rivet hole is slightly larger than the rivet end.

4. The cover plate structure of a blade battery according to claim 3, characterized in that: As another solution, the upper end of the negative electrode column is a cylindrical negative electrode forming end, and the rivet hole corresponds to the shape of the negative electrode forming end.

5. The cover plate structure of a blade battery according to claim 1, characterized in that: The upper plastic is provided with an installation groove for installing the terminal, and a first hole is opened in the middle of the installation groove.

6. The cover plate structure of a blade battery according to claim 5, characterized in that: A positioning groove for positioning the upper plastic is provided on one side of the aluminum cover, a fixing groove is provided on the other side and an explosion-proof valve is installed in the fixing groove, a second hole is provided in the middle of the positioning groove, and an explosion-proof valve film is provided above the explosion-proof valve.

7. The cover plate structure of a blade battery according to claim 6, characterized in that: A third hole is formed on the lower plastic.

8. The cover plate structure of a blade battery according to claim 7, characterized in that: The first hole, the second hole and the third hole correspond to each other and are for the pole to pass through. The sealing ring is sleeved on the pole and the connection between the sealing ring and the lower plastic is stepped.

9. The cover plate structure of a blade battery according to claim 3, characterized in that: A detection groove is provided on the side surface of the bottom plate.

10. A blade battery, characterized in that: It includes the cover plate structure of the blade battery according to any one of claims 1 to 9, and an aluminum shell with a square cross-section, wherein a positive electrode cover plate is installed at one end of the aluminum shell and a negative electrode cover plate is installed at the other end.

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