Integrated bipolar column structure and battery

Abstract

The utility model discloses an integrated double-pole structure and a battery, which comprise an end plate, a first pole and a second pole, and the first pole and the second pole are respectively connected with the upper surface of the end plate. According to the utility model, the pole and the end plate structure are separated and are welded together through laser, so that the problems that the cost of an integrally formed bipolar pole is high and a composite pole cannot be manufactured are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of poles, in particular to an integrated double-pole structure and a battery. Background Art

[0002] At present, due to the difficulty of forming process, most of the bipolar column design schemes adopt the machined all-copper (negative electrode) or all-aluminum (positive electrode) bipolar column structure. The cost of machined all-copper and all-aluminum poles is relatively high, and because the two poles interfere with each other, it is impossible to make copper-aluminum composite poles.

[0003] Another solution is a split bipolar column design. The split bipolar column has a reduced available welding area and a separate welding area, so its performance is inferior to that of an integrated bipolar column. Utility Model Content

[0004] In view of the above problems existing in the existing bipolar columns, an integrated bipolar column structure and a battery are now provided.

[0005] The specific technical solutions are as follows:

[0006] An integrated bipolar column structure comprises an end plate, a first pole and a second pole, wherein the first pole and the second pole are respectively fixedly connected to the upper surface of the end plate by laser welding.

[0007] The above-mentioned integrated bipolar column structure, wherein the end plate has two grooves, the first pole and the second pole are respectively installed in the two grooves, and the first pole and the groove of the end plate, and the second pole and the groove of the end plate are fixedly connected by laser welding.

[0008] The above-mentioned integrated bipolar column structure, wherein the first pole and the second pole both include: a columnar portion and a connecting portion connected to each other, wherein the connecting portion is installed in the groove, and the connecting portion is fixedly connected to the groove of the end plate by laser welding.

[0009] The above-mentioned integrated bipolar column structure, wherein the inner diameter of the groove is larger than the outer diameter of the first pole;

[0010] The inner diameter of the groove is greater than the outer diameter of the second pole.

[0011] The above-mentioned integrated bipolar column structure, wherein the connecting portion is a plate-like structure, the shape of the connecting portion matches the shape of the groove, and the columnar portion is fixedly connected to the connecting portion;

[0012] Alternatively, the connecting portion includes a plate-like structure and a boss structure provided on the plate-like structure, and the columnar portion is fixedly connected to the boss.

[0013] In the above-mentioned integrated bipolar column structure, the columnar portion and the connecting portion are fixedly connected by friction welding.

[0014] In the above-mentioned integrated bipolar column structure, the material of the columnar portion is the same as or different from the material of the connecting portion.

[0015] In the above-mentioned integrated bipolar column structure, the columnar portion is made of aluminum, the connecting portion is made of copper or aluminum, and the end plate is made of copper or aluminum.

[0016] In the above-mentioned integrated bipolar column structure, the groove is a circular groove.

[0017] The above-mentioned integrated bipolar column structure, wherein the end plate is rectangular or square;

[0018] The four corners of the end plate are chamfered or rounded.

[0019] A battery, comprising a positive electrode cover plate and a negative electrode cover plate, and also comprising two integrated bipolar column structures as described in any one of the above items, wherein the two integrated bipolar column structures are respectively installed on the positive electrode cover plate and the negative electrode cover plate.

[0020] Compared with the prior art, the above technical solution has the following positive effects:

[0021] The pole and the end plate of the utility model are separated and welded together by laser. The end plate is an integrated structure without reducing the welding area, thus solving the problems of high cost of the integrated bipolar pole and inability to manufacture composite poles.

[0022] The columnar part and the connecting part of the utility model are fixedly connected by friction welding, and can be used as a composite pole. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a top view of a first embodiment of an integrated bipolar column structure of the utility model;

[0024] Figure 2 It is a front view of a first embodiment of an integrated bipolar column structure of the utility model;

[0025] Figure 3 The utility model is an integrated double-pole structure Figure 1 Sectional view in the AA direction;

[0026] Figure 4 It is a top view of a second embodiment of an integrated bipolar column structure of the utility model;

[0027] Figure 5It is a front view of a second embodiment of an integrated bipolar column structure of the utility model;

[0028] Figure 6 The utility model is an integrated double-pole structure Figure 4 Cross-sectional view in the BB direction;

[0029] Figure 7 This is a schematic diagram of the structure of a battery of the utility model;

[0030] Figure 8 This is a structural front view of a battery of the utility model;

[0031] Fig. 9 This is a top view of the structure of a battery of the utility model;

[0032] Fig.10 This is a bottom view of the structure of a battery of the utility model;

[0033] In the accompanying drawings: 1, end plate; 2, step; 3, groove; 4, integrated bipolar column structure; 11, first pole; 12, second pole; 21, columnar portion; 22, connecting portion; 221, plate-like structure; 222, boss structure. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0035] like Figures 1 to 6 As shown, an integrated bipolar column structure 4 of a preferred embodiment is shown, comprising: an end plate 1, a first pole 11 and a second pole 12, wherein the first pole 11 and the second pole 12 are respectively fixedly connected to the upper surface of the end plate 1 by laser welding.

[0036] Furthermore, as a preferred embodiment, the end plate 1 has two grooves 3, the first pole 11 and the second pole 12 are respectively installed in the two grooves 3, and the first pole 11 and the groove 3 of the end plate 1, and the second pole 12 and the groove 3 of the end plate 1 are fixedly connected by laser welding.

[0037] Further, as a preferred embodiment, the first pole 11 and the second pole 12 both include: a columnar portion 21 and a connecting portion 22 connected to each other, wherein the connecting portion 22 is installed in the groove 3, and the connecting portion 22 is fixedly connected to the groove 3 of the end plate 1 by laser welding.

[0038] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention.

[0039] The utility model also has the following implementation methods based on the above:

[0040] In further embodiments of the present invention, please continue to refer to Figure 1 As shown, the inner diameter of the groove 3 is greater than the outer diameter of the first pole 11 .

[0041] In a further embodiment of the present invention, the inner diameter of the groove 3 is greater than the outer diameter of the second pole 11 .

[0042] In a further embodiment of the present invention, the columnar portion 21 and the connecting portion 22 are fixedly connected by friction welding.

[0043] In a further embodiment of the present invention, the material of the columnar portion 21 is the same as or different from the material of the connecting portion 22 .

[0044] In a further embodiment of the present invention, the groove 3 is a circular groove.

[0045] In a further embodiment of the present invention, the end plate 1 is rectangular or square.

[0046] In a further embodiment of the present invention, the four corners of the end plate 1 are chamfered or rounded.

[0047] The pole and the end plate 1 of the utility model are separated in structure and are welded together by laser. The end plate 1 is an integrated structure without reducing the welding area, thus solving the problems of high cost of the integrated bipolar pole and inability to manufacture composite poles.

[0048] The columnar portion 21 and the connecting portion 22 of the utility model are fixedly connected by friction welding, and can be made into a composite pole.

[0049] First embodiment:

[0050] like Figure 1-3 As shown, this embodiment is a positive electrode column.

[0051] Further, as a preferred embodiment, the connecting portion 22 is a plate-like structure, the shape of the connecting portion 22 matches the shape of the groove 3 , and the columnar portion 21 is fixedly connected to the connecting portion 22 .

[0052] Preferably, the plate-like structure is a circular plate.

[0053] Further, as a preferred embodiment, the columnar portion 21 is made of aluminum, the connecting portion 22 is made of aluminum, and the end plate 1 is made of aluminum.

[0054] Second embodiment:

[0055] like Figure 4-6 As shown, this embodiment is a negative electrode column.

[0056] Further, as a preferred embodiment, the connecting portion 22 includes a plate-like structure 221 and a boss structure 222 disposed on the plate-like structure 221 , and the columnar portion 21 is fixedly connected to the boss structure 222 .

[0057] Preferably, a step 2 is formed between the plate-like structure 221 and the boss structure 222 .

[0058] Preferably, the boss structure 222 is a truncated cone, the plate-like structure 221 is a circular plate, and the outer diameter of the boss structure 222 is smaller than the outer diameter of the plate-like structure 221 .

[0059] Further, as a preferred embodiment, the columnar portion 21 is made of aluminum, the connecting portion 22 is made of copper, and the end plate 1 is made of copper.

[0060] like Figures 7 to 10 As shown, the utility model also shows a battery, including a positive electrode cover plate and a negative electrode cover plate, and also including two integrated bipolar column structures 4, and the two integrated bipolar column structures 4 are respectively installed on the positive electrode cover plate and the negative electrode cover plate.

[0061] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. An integrated bipolar column structure, characterized in that: include: An end plate, a first pole and a second pole, wherein the first pole and the second pole are respectively fixedly connected to the upper surface of the same end plate by laser welding; The end plate has two grooves, and the first pole and the second pole are respectively installed in the two grooves.

2. The integrated bipolar column structure according to claim 1, characterized in that: The first pole and the second pole each include: a columnar portion and a connecting portion connected to each other, wherein the connecting portion is installed in the groove, and the connecting portion is fixedly connected to the groove of the end plate by laser welding.

3. The integrated bipolar column structure according to claim 2, characterized in that: The inner diameter of the groove is greater than the outer diameter of the first pole; The inner diameter of the groove is greater than the outer diameter of the second pole.

4. The integrated bipolar column structure according to claim 2, characterized in that: The connecting part is a plate-like structure, the shape of the connecting part matches the shape of the groove, and the columnar part is fixedly connected to the connecting part; Alternatively, the connecting portion includes a plate-like structure and a boss structure provided on the plate-like structure, and the columnar portion is fixedly connected to the boss structure.

5. The integrated bipolar column structure according to claim 2, characterized in that: The columnar portion and the connecting portion are fixedly connected by friction welding.

6. The integrated bipolar column structure according to claim 2, characterized in that: The material of the columnar portion is the same as or different from the material of the connecting portion.

7. The integrated bipolar column structure according to claim 6, characterized in that: The columnar portion is made of aluminum, the connecting portion is made of copper or aluminum, and the end plate is made of copper or aluminum.

8. The integrated bipolar column structure according to claim 3, characterized in that: The groove is a circular groove.

9. The integrated bipolar column structure according to claim 8, characterized in that: The end plate is rectangular or square; The four corners of the end plate are chamfered or rounded.

10. A battery, characterized in that: It comprises a positive electrode cover plate and a negative electrode cover plate, and also comprises two integrated bipolar column structures as described in any one of claims 1 to 9, wherein the two integrated bipolar column structures are respectively installed on the positive electrode cover plate and the negative electrode cover plate.

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