Cover plate assembly and battery

Abstract

The utility model provides a cover plate assembly and a battery. The cover plate assembly comprises a pole, a base plate, a pressing block and a connecting piece, the base plate is provided with a pole hole, the pole penetrates through the pole hole, the connecting piece is located on the side, away from the base plate, of the pressing block and connected to the pole, the side, away from the base plate, of the pressing block is provided with a welding groove, and the welding groove is connected to the connecting piece. A first welding positioning hole is formed in the inner wall of the welding groove, and the pole penetrates through the first welding positioning hole through the pole hole. The post terminal and the connecting piece are welded in the welding groove through laser, the post terminal and the connecting piece are welded in a splicing mode, the post terminal is welded and fixed to the connecting piece, further, when the post terminal and the connecting piece are welded in a laser mode and welded in a splicing mode, due to the existence of the welding groove, welding marks generated in the welding process cannot protrude out of the upper portion of the pressing block but are located in the welding groove, and the welding quality is improved. Therefore, the surfaces of the pole and the connecting piece are smooth, and normal assembly and use of subsequent batteries are ensured.

Description

Technical Field

[0001] The present disclosure relates to the technical field of lithium battery pole welding, and in particular to a cover plate assembly and a battery. Background Art

[0002] The battery pole and connecting piece are generally connected by welding. If the connecting piece and the cover pole are not positioned during the welding process, the connecting piece is pressed onto the pole surface by a welding jig for welding. This method can easily cause the connecting piece to be offset relative to the cover pole, resulting in a reduction in the effective welding area, which ultimately affects the battery overcurrent and temperature rise, resulting in poor welding results.

[0003] In order to solve the above problems, a Chinese patent with application number CN202223277171.8 discloses a lithium battery pole and connecting piece structure, including a connecting piece and a top cover pole; a protrusion is provided on the top surface of the top cover pole; a through hole matching the shape of the protrusion is provided at the installation position corresponding to the connecting piece and the top cover pole, thereby realizing direct positioning of the connecting piece and the top cover pole, reducing the weight of the connecting piece and having the characteristics of laser welding splicing welding, and is mainly used for positioning the connecting piece and the top cover pole before welding.

[0004] Although the above-mentioned lithium battery pole and connecting piece structure has a protrusion on the top surface of the pole and a through hole matching the shape of the protrusion at the corresponding position of the connecting piece, which plays the role of positioning the pole before welding, the above-mentioned lithium battery pole and connecting piece structure is prone to the problem of weld mark protrusion during welding, resulting in uneven connection surface between the pole and the connecting piece, which greatly affects the normal assembly and use of the battery.

[0005] Therefore, there is a need for a cover plate assembly and a battery that will not produce a weld mark bulge problem when welding the pole. Utility Model Content

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a cover plate assembly and a battery that will not produce weld mark bulges when welding poles.

[0007] The purpose of this disclosure is achieved through the following technical solutions:

[0008] A cover plate assembly includes a pole, a substrate, a pressing block and a connecting piece, wherein the substrate is provided with a pole hole, the pole is passed through the pole hole, the connecting piece is located on the side of the pressing block away from the substrate, and the connecting piece is connected to the pole; a welding groove is provided on the side of the pressing block away from the substrate, a first welding positioning hole is provided on the inner wall of the welding groove, and the pole is passed through the pole hole and is passed through the first welding positioning hole.

[0009] In one of the embodiments, the welding groove is an annular groove structure.

[0010] In one embodiment, the center line of the welding groove is arranged to coincide with the center line of the first welding positioning hole.

[0011] In one embodiment, the pole is welded to the pressing block.

[0012] In one embodiment, the connecting piece is provided with a second welding positioning hole, and the pole is welded to the connecting piece through the second welding positioning hole.

[0013] In one of the embodiments, the pole is spliced ​​and welded to the connecting piece through a second welding positioning hole.

[0014] In one embodiment, an abutting surface is provided at the end of the pole adjacent to the connecting piece, a positioning protrusion is convexly provided on the abutting surface, the positioning protrusion is penetrated through the second welding positioning hole, and the abutting surface abuts against the connecting piece.

[0015] In one of the embodiments, the abutting surface is welded to the connecting piece.

[0016] In one of the embodiments, the abutting surface and the connecting piece are fixed by laser welding.

[0017] The present application also provides a battery, comprising the cover plate assembly described in any of the above embodiments.

[0018] Compared with the prior art, the present invention has at least the following advantages:

[0019] In the above-mentioned cover plate assembly, a welding groove is provided on the side of the pressing block facing away from the base plate, a first welding positioning hole is provided on the inner wall of the welding groove, and the pole is passed through the pole hole and is arranged in the first welding positioning hole. The pole is welded and fixed to the connecting piece by laser welding the pole and splicing the pole and the connecting piece in the welding groove. Furthermore, when laser welding and splicing welding the pole and the connecting piece, due to the presence of the welding groove, the welding mark generated during welding will not protrude above the pressing block, but will be located in the welding groove, thereby making the surface of the pole and the connecting piece smooth, ensuring the normal assembly and use of the subsequent battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a schematic structural diagram of a cover plate assembly according to an embodiment;

[0022] Figure 2 for Figure 1 Another structural schematic diagram of the cover plate assembly shown;

[0023] Figure 3 for Figure 2 An enlarged schematic diagram of point A of the cover plate assembly shown;

[0024] Figure 4 for Figure 1 A schematic cross-sectional structure diagram of the cover plate assembly shown;

[0025] Figure 5 for Figure 4 An enlarged schematic diagram of point B of the cross-sectional view shown;

[0026] Figure 6 for Figure 4 An enlarged schematic diagram of point C in the cross-sectional view shown. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] The present disclosure provides a cover plate assembly, including a pole, a substrate, a pressing block and a connecting piece, the substrate is provided with a pole hole, the pole is inserted into the pole hole, the connecting piece is located on the side of the pressing block away from the substrate, and the connecting piece is connected to the pole; a welding groove is provided on the side of the pressing block away from the substrate, a first welding positioning hole is provided on the inner wall of the welding groove, and the pole is inserted into the first welding positioning hole through the pole hole.

[0031] In the above-mentioned cover plate assembly, a welding groove is provided on the side of the pressing block facing away from the base plate, a first welding positioning hole is provided on the inner wall of the welding groove, and the pole is passed through the pole hole and is arranged in the first welding positioning hole. The pole is welded and fixed to the connecting piece by laser welding the pole and splicing the pole and the connecting piece in the welding groove. Furthermore, when laser welding and splicing welding the pole and the connecting piece, due to the presence of the welding groove, the welding mark generated during welding will not protrude above the pressing block, but will be located in the welding groove, thereby making the surface of the pole and the connecting piece smooth, ensuring the normal assembly and use of the subsequent battery.

[0032] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0033] like Figures 1 to 6 As shown, a cover plate assembly 10 of an embodiment includes a pole 100, a substrate 200, a pressing block 300 and a connecting piece 400, wherein the substrate 200 is provided with a pole hole 201, the pole 100 is passed through the pole hole 201, the connecting piece 400 is located on the side of the pressing block 300 away from the substrate 200, and the connecting piece 400 is connected to the pole 100; a welding groove 301 is provided on the side of the pressing block 300 away from the substrate 200, a first welding positioning hole 302 is provided on the inner wall of the welding groove 301, and the pole 100 is passed through the pole hole 201 and is passed through the first welding positioning hole 302.

[0034] In this embodiment, a welding groove 301 is provided on the side of the pressing block 300 facing away from the substrate 200, and a first welding positioning hole 302 is provided on the inner wall of the welding groove 301. The pole 100 is inserted into the first welding positioning hole 302 through the pole hole 201, and the pole 100 and the connecting piece 400 are welded and fixed to the connecting piece 400 by laser welding and splicing welding the pole 100 and the connecting piece 400 in the welding groove 301. Furthermore, when laser welding and splicing welding the pole 100 and the connecting piece 400, due to the presence of the welding groove 301, the welding mark generated during welding will not protrude above the pressing block 300, but will be located in the welding groove 301, thereby making the surface of the pole 100 and the connecting piece 400 smooth, ensuring the normal assembly and use of the subsequent battery.

[0035] In the above-mentioned cap plate assembly 10, a welding groove 301 is provided on the side of the pressing block 300 facing away from the substrate 200, and a first welding positioning hole 302 is provided on the inner wall of the welding groove 301. The pole 100 is inserted into the first welding positioning hole 302 through the pole hole 201. The pole 100 is welded and fixed to the connecting piece 400 by laser welding the pole 100 and splicing the pole 100 and the connecting piece 400 in the welding groove 301. Furthermore, when laser welding and splicing welding the pole 100 and the connecting piece 400, due to the presence of the welding groove 301, the welding mark generated during welding will not protrude above the pressing block 300, but will be located in the welding groove 301, thereby making the surface of the pole 100 and the connecting piece 400 smooth, ensuring the normal assembly and use of the subsequent battery.

[0036] like Figure 2 and Figure 3 As shown, in one embodiment, the welding groove 301 is an annular groove structure. In this embodiment, the welding groove 301 is an annular groove structure, that is, the welding groove 301 is arranged along the outer peripheral wall of the pole 100, and the pole 100 and the connecting piece 400 are laser welded and spliced ​​along the circumference of the welding groove 301 during welding, so that the pole 100 is welded firmly.

[0037] like Figure 2 and Figure 3 As shown, in one embodiment, the center line of the welding groove 301 is arranged to coincide with the center line of the first welding positioning hole 302. In this embodiment, the center line of the welding groove 301 is arranged to coincide with the center line of the first welding positioning hole 302, that is, the welding groove 301 is annular, and the annular welding groove 301 makes the welding of the pole 100 uniform, thereby improving the welding quality.

[0038] like Figures 4 to 6 As shown, in one embodiment, the pole 100 is welded to the pressing block 300. In this embodiment, the pole 100 is welded to the pressing block 300. It can be understood that by welding the pole 100 and the pressing block 300, the pole 100 is initially fixed to play a positioning role.

[0039] like Figures 4 to 6 As shown, in one embodiment, the connecting piece 400 is provided with a second welding positioning hole 402, and the pole 100 is welded to the connecting piece 400 through the second welding positioning hole 402. In this embodiment, the connecting piece 400 is provided with a second welding positioning hole 402, that is, the pole 100 and the connecting piece 400 are laser welded through the second welding positioning hole 402, so that the welding is visualized and welding errors are not likely to occur during welding.

[0040] like Figures 4 to 6As shown, in one embodiment, the end of the pole 100 adjacent to the connecting piece 400 is provided with an abutting surface 101, and the abutting surface 101 is provided with a positioning protrusion 102, and the positioning protrusion 102 is passed through the second welding positioning hole 402, and the abutting surface 101 abuts against the connecting piece 400. In this embodiment, the abutting surface 101 is provided with a positioning protrusion 102, and it can be understood that before welding, the positioning protrusion is first passed through the second welding positioning hole 402 to achieve the positioning effect of the pole 100 before welding, so as to prevent the pole 100 from shifting during welding.

[0041] like Figures 4 to 6 As shown, in one embodiment, the abutting surface 101 is welded to the connecting piece 400. In this embodiment, the abutting surface 101 is welded to the connecting piece 400, so that the pole and the connecting piece are electrically connected to ensure the normal charging and discharging performance of the battery.

[0042] like Figures 4 to 6 As shown, in one embodiment, the abutting surface 101 is fixed to the connecting piece 400 by laser welding. In this embodiment, the abutting surface 101 is laser welded to the connecting piece 400, so that the pole 100 and the connecting piece 400 are electrically connected to ensure the normal charging and discharging performance of the battery.

[0043] like Figures 4 to 6 As shown, in one embodiment, the pole 100 is spliced ​​and welded with the connecting piece 400 through the second welding positioning hole 402. In this embodiment, the pole 100 is spliced ​​and welded with the connecting piece 400 through the second welding positioning hole 402, so that the pole 100 and the connecting piece 400 are electrically connected to ensure the normal charging and discharging performance of the battery, and the splicing welding is combined with the penetration welding, so that the connection area between the pole 100 and the connecting piece 400 is increased, meeting the structural design requirements of a larger current, and can meet the 1C charging and discharging of 700ah.

[0044] The present application also provides a battery, comprising the cover plate assembly 10 of any of the above embodiments.

[0045] Compared with the prior art, the present invention has at least the following advantages:

[0046] In the above-mentioned cap plate assembly 10, a welding groove 301 is provided on the side of the pressing block 300 facing away from the substrate 200, and a first welding positioning hole 302 is provided on the inner wall of the welding groove 301. The pole 100 is inserted into the first welding positioning hole 302 through the pole hole 201. The pole 100 is welded and fixed to the connecting piece 400 by laser welding the pole 100 and splicing the pole 100 and the connecting piece 400 in the welding groove 301. Furthermore, when laser welding and splicing welding the pole 100 and the connecting piece 400, due to the presence of the welding groove 301, the welding mark generated during welding will not protrude above the pressing block 300, but will be located in the welding groove 301, thereby making the surface of the pole 100 and the connecting piece 400 smooth, ensuring the normal assembly and use of the subsequent battery.

[0047] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure shall be based on the attached claims.

Claims

1. A cover plate assembly, comprising a pole, a base plate, a pressing block and a connecting piece, wherein the base plate is provided with a pole hole, the pole is passed through the pole hole, the connecting piece is located on a side of the pressing block away from the base plate, and the connecting piece is connected to the pole, characterized in that: A welding groove is formed on a side of the pressing block facing away from the substrate, a first welding positioning hole is formed on an inner wall of the welding groove, and the pole is passed through the pole hole and is arranged in the first welding positioning hole.

2. The cover plate assembly according to claim 1, characterized in that: The welding groove is an annular groove structure.

3. The cover plate assembly according to claim 1, characterized in that: The center line of the welding groove is arranged to coincide with the center line of the first welding positioning hole.

4. The cover plate assembly according to claim 1, characterized in that: The pole is welded to the pressing block.

5. The cover plate assembly according to claim 1, characterized in that: The connecting piece is provided with a second welding positioning hole, and the pole is welded to the connecting piece through the second welding positioning hole.

6. The cover plate assembly according to claim 5, characterized in that: The pole is spliced ​​and welded to the connecting piece through the second welding positioning hole.

7. The cover plate assembly according to claim 5, characterized in that: An abutting surface is provided at the end of the pole adjacent to the connecting piece, and a positioning protrusion is convexly provided on the abutting surface. The positioning protrusion is penetrated through the second welding positioning hole, and the abutting surface abuts against the connecting piece.

8. The cover plate assembly according to claim 7, characterized in that: The abutting surface is welded to the connecting piece.

9. The cover plate assembly according to claim 8, characterized in that: The abutting surface and the connecting piece are fixed by laser welding.

10. A battery, characterized in that: The invention comprises the cover plate assembly according to any one of claims 1 to 9.

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