Cover plate assembly and battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a cover plate assembly and a battery, the cover plate assembly comprises a cover plate body, a pin, a pole and an aluminum block, the pin comprises a connecting part and a processing part, the connecting part is connected with a battery cell, the processing part and the pole are integrally formed, and the aluminum block is arranged on the connecting part. One end, deviating from the connecting part, of the pole and the connecting part are respectively arranged on two sides of the cover plate body; the aluminum block is arranged on one side, deviating from the connecting part, of the cover plate body and is fixedly connected with the pole. Therefore, the pole is integrally formed on the processing part through stamping, so that the connection strength and the connection effect of the pole and the pin can be improved, the welding step is saved, the welding defect is avoided, and the assembly efficiency and the yield of the cover plate are further improved; and the pins are electrically connected with the battery cell, so that the battery can be stably and electrically connected with an external circuit.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a cover plate assembly and a battery. Background Art

[0002] As a device that converts chemical energy into electrical energy, batteries have a wide range of applications, covering daily life, industry, transportation, military and other fields.

[0003] The battery includes a cover, a shell and a battery cell. The battery cell is arranged inside the shell. The cover is fixedly connected to the shell to protect the battery cell. The cover is provided with a pole for connecting to an external circuit. The pole is connected to a pin. The two ends of the pin are electrically connected to the pole and the battery cell respectively to realize the connection between the battery and the external circuit.

[0004] The pins are usually welded to the poles by laser welding. Due to the high cost of laser welding and the easy occurrence of defects such as poor welding during the welding process, the connection strength between the pins and the poles is reduced and the connection effect is poor, which in turn affects the cover assembly yield. Utility Model Content

[0005] The purpose of the utility model is to provide a cover plate assembly and a battery, so as to solve the problems of low connection strength and poor connection effect between pins and poles.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] In a first aspect, a cover assembly comprises: a cover body; a pin and a pole, the pin comprising a connecting portion and a processing portion, the connecting portion being connected to the battery cell, the processing portion being integrally formed with the pole, an end of the pole away from the connecting portion and the connecting portion being respectively arranged on both sides of the cover body; an aluminum block, the aluminum block being arranged on a side of the cover body away from the connecting portion and fixedly connected to the pole.

[0008] Preferably, the pole includes a first part and a second part, one end of the first part is connected to the processing part, and the other end is connected to the second part, the end of the second part facing away from the first part is connected to the aluminum block, and the minimum cross-sectional area of ​​the first part is greater than the maximum cross-sectional area of ​​the second part.

[0009] Preferably, the thickness of the end of the second portion facing away from the first portion is in the range of 1.5 mm to 2 mm; and / or the thickness of the side wall of the second portion is in the range of 0.9 mm to 1.2 mm.

[0010] Preferably, one pin is connected to two connecting portions, and the two connecting portions are symmetrically arranged on both sides of the processing portion.

[0011] Preferably, the thickness of the processed portion of the pin is in the range of 1.4 mm to 2 mm.

[0012] Preferably, the poles are arranged in one-to-one correspondence with the aluminum blocks, and the poles pass through the aluminum blocks and are welded to a side of the aluminum blocks facing away from the cover plate body.

[0013] Preferably, the side of the aluminum block facing away from the cover plate body protrudes from the end surface of the pole facing away from the processing portion.

[0014] Preferably, the cover assembly further includes an upper plastic, which is arranged between the aluminum block and the cover body; and / or the cover assembly further includes a lower plastic, which is arranged between the cover body and the processing portion.

[0015] Preferably, the cover plate assembly further includes a sealing ring, which is arranged between the pole and the cover plate body.

[0016] In a second aspect, a battery comprises a shell, a battery cell and the cover plate assembly as described above, wherein the shell is connected to the cover plate body, the battery cell is arranged inside the shell, and the connecting portion is electrically connected to the battery cell.

[0017] Beneficial effects of the utility model:

[0018] A cover assembly includes a cover body, a pin, a pole and an aluminum block. The pin includes a connecting part and a processing part. The connecting part is connected to the battery cell, and the processing part is integrally formed with the pole. The end of the pole away from the connecting part and the connecting part are respectively arranged on both sides of the cover body; the aluminum block is arranged on the side of the cover body away from the connecting part and is fixedly connected to the pole.

[0019] In this way, the pole is formed in the processing part by stamping, which can save the welding process of the pole and the pin, improve the processing efficiency of the pole, reduce the processing cost, avoid welding defects, improve the connection strength and connection effect between the pole and the pin, and make the connection between the cover body and the pole and pin more stable, thereby improving the assembly efficiency and yield of the cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of a cover plate assembly in one embodiment of the present invention;

[0021] Figure 2 This is a schematic structural diagram of the pins and poles in one embodiment of the present invention;

[0022] Figure 3 It is a cross-sectional view of a pin and a pole in one embodiment of the present utility model;

[0023] Figure 4It is a partial cross-sectional view of a cover plate assembly in one embodiment of the present utility model.

[0024] In the picture:

[0025] 1. Cover body; 2. Pin; 21. Connection part; 22. Processing part; 3. Pole; 31. First part; 32. Second part; 4. Aluminum block; 41. Connection groove; 5. Upper plastic; 6. Lower plastic; 7. Sealing ring. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0027] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0028] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0029] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0030] First, see Figure 1 and Figure 2The utility model provides a cover assembly, including a cover body 1, a pin 2, a pole 3 and an aluminum block 4. The pin 2 includes a connecting portion 21 and a processing portion 22. The connecting portion 21 is connected to the battery cell, and the processing portion 22 is integrally formed with the pole 3. One end of the pole 3 away from the connecting portion 21 and the connecting portion 21 are respectively arranged on both sides of the cover body 1; the aluminum block 4 is arranged on one side of the cover body 1 away from the connecting portion 21 and is fixedly connected to the pole 3.

[0031] In this embodiment, the cover body 1 is a bare aluminum sheet structure, the pin 2 is made of conductive material, the pole 3 is integrally formed with the processing part 22 by stamping, and the pole 3 is located in the middle of the processing part 22, and the aluminum block 4 and the pole 3 are fixedly connected by welding.

[0032] In this way, the pole 3 is formed in the processing portion 22 by stamping, which can save the welding process of the pole 3 and the pin 2, thereby avoiding the generation of welding defects, improving the connection strength and connection effect between the pole 3 and the pin 2, and can improve the processing efficiency of the pole 3, thereby improving the assembly efficiency and yield of the cover assembly; the connecting portion 21 of the pin 2 can be electrically connected to the battery cell, so that the processing of the pole 3 is not likely to affect the connection relationship between the connecting portion 21 and the battery cell, so that the current inside the battery can be stably transmitted to the external circuit through the pole 3.

[0033] It is understandable that the cover body 1, pins 2, and aluminum block 4 can be made of the same material or different materials, as long as the battery cell can be electrically connected to the aluminum block 4 through the pins 2, the poles 3, and no further examples are given here.

[0034] See Figure 1 and Figure 2 In some embodiments, the terminal 3 includes a first portion 31 and a second portion 32. One end of the first portion 31 is connected to the processed portion 22, and the other end is connected to the second portion 32. The end of the second portion 32 facing away from the first portion 31 is connected to the aluminum block 4. The minimum cross-sectional area of ​​the first portion 31 is greater than the maximum cross-sectional area of ​​the second portion 32. In this embodiment, the second portion 32 has a stepped structure, with the first portion 31 and the second portion 32 integrally formed. Along the thickness direction of the cover body 1, the second portion 32, the first portion 31, the processed portion 22, and the connecting portion 21 are sequentially arranged. The cover body 1 is provided with a mounting hole (not shown) for the second portion 32 to pass through. The second portion 32 is snap-fitted to the cover body 1.

[0035] In this way, the first part 31 and the second part 32 are integrally formed, which can simplify the production process of the pole 3 and avoid welding defects at the connection between the pole 3 and the pin 2 and affect the connection strength; since the cross-sectional area of ​​the first part 31 is large, the first part 31 can be clamped with the cover body 1, thereby limiting the upward movement of the pole 3 and the pin 2 (that is, in the direction toward the side of the aluminum block 4 set toward the cover body 1), and the second part 32 is fixedly connected to the aluminum block 4, which can limit the downward movement of the pole 3 and the pin 2 (that is, in the direction away from the side of the aluminum block 4 set away from the cover body 1), thereby limiting the position of the pole 3 and the pin 2 on the cover body 1, avoiding their displacement during assembly and use and affecting the assembly yield of the cover assembly, and improving the connection strength between the cover body 1 and the pole 3 and the pin 2.

[0036] It is understandable that the minimum cross-sectional area of ​​the first portion 31 may also be equal to the maximum cross-sectional area of ​​the second portion 32 , as long as the pin 2 is stably engaged with the cover body 1 , which will not be elaborated here.

[0037] See Figure 3 In some embodiments, the thickness of the second portion 32 at one end facing away from the first portion 31 is D1, and D1 ranges from 1.5 mm to 2 mm. The sidewall thickness of the second portion 32 is D2, and D2 ranges from 0.9 mm to 1.2 mm. For example, D1 can be 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, or 2 mm, and D2 can be 0.9 mm, 1 mm, 1.1 mm, or 1.2 mm.

[0038] In this way, the end of the second part 32 away from the first part 31 can maintain structural strength, avoid deformation when fixedly connected to the aluminum block 4, and facilitate stamping and forming; the side wall of the second part 32 is convenient for forming the pole 3 during the stamping and stretching process, avoiding cracking due to insufficient material thickness, improving the forming effect of the pole 3, and thereby improving the connection strength between the pole 3 and the pin 2 and the assembly yield of the cover assembly.

[0039] It is understandable that the thickness of the end of the second portion 32 away from the first portion 31 and the thickness of the sidewall of the second portion 32 can be flexibly adjusted according to the actual size of the pin 2, and no further details are given here.

[0040] See Figure 1 and Figure 2 In some embodiments, one pin 2 is connected to two connecting portions 21, which are symmetrically arranged on either side of the processing portion 22. In this embodiment, the two connecting portions 21 are both vertically arranged and symmetrically arranged on either side of the processing portion 22 about the axis in the longitudinal direction of the cover body 1. The two connecting portions 21 are of equal length, that is, the end surfaces of the two connecting portions 21 facing away from the processing portion 22 are flush.

[0041] In this way, by forming the pole 3 by stamping, the assembly efficiency can be improved. Both connecting parts 21 are connected to the battery cell, which can enhance the connection strength between the connecting part 21 and the battery cell, thereby improving the overall structural strength of the battery and making the electrical connection between the battery and the external circuit more stable.

[0042] It is understandable that the lengths of the two connecting parts 21 may not be equal, and the specific size and setting position of the connecting part 21 can be flexibly adjusted so that the battery cell can be electrically connected to the aluminum block 4 through the connecting part 21, the processing part 22, and the pole 3. No more details will be listed here.

[0043] See Figure 3 In some embodiments, the thickness of the processed portion 22 of the lead 2 is D3, and the range of D3 is 1.4 mm-2 mm. For example, D3 can be 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, or 2 mm.

[0044] In this way, the processed portion 22 of the pin 2 has a certain thickness, which can facilitate stamping to form the pole 3 while having sufficient structural strength, avoid cracking due to insufficient material thickness, and improve the connection strength between the pole 3 and the processed portion 22.

[0045] It can be understood that the thickness of the processing portion 22 of the pin 2 can be equal to or different from the thickness of the connecting portion 21. In this embodiment, the thickness of the processing portion 22 is equal to the thickness of the connecting portion 21. The purpose is to make the overall force of the pin 2 uniform, facilitate stamping processing, and improve the assembly efficiency of the cover assembly.

[0046] See Figure 4 In some embodiments, the poles 3 are provided in a one-to-one correspondence with the aluminum blocks 4. The poles 3 pass through the aluminum blocks 4 and are welded to the side of the aluminum blocks 4 facing away from the cover body 1. That is, the end of the second portion 32 of the pole 3 facing away from the first portion 31 is welded to the aluminum block 4. In this embodiment, two poles 3 are provided, and the two poles 3 are respectively provided at both ends of the cover body 1 and fixedly connected to the cover body 1. Two corresponding aluminum blocks 4 are provided, and the poles 3 and aluminum blocks 4 are fixedly connected by laser welding.

[0047] In this way, the first part 31 of the pole 3 is clamped with the cover body 1, and the second part 32 is welded to the aluminum block 4, which can limit the position of the pole 3, thereby making the connection between the pin 2 and the pole 3 and the cover body 1 more stable, and facilitating the assembly of the pole 3 and the pin 2 to the cover body 1, thereby improving assembly efficiency and yield.

[0048] It is understandable that the arrangement positions of the pole 3 and the aluminum block 4 can be adjusted according to actual design requirements, and no further details are given here.

[0049] See Figure 4In some embodiments, the side of the aluminum block 4 facing away from the cover body 1 protrudes from the end face of the pole 3 facing away from the processed portion 22. A connecting groove 41 is defined in the center of the aluminum block 4. The second portion 32 of the pole 3 passes through the connecting groove 41, and the end face of the second portion 32 of the pole 3 facing away from the first portion 31 is located within the connecting groove 41.

[0050] In this way, the aluminum block 4 can be stably connected to the pole 3 to limit the position of the aluminum block 4 on the cover body 1, and the second portion 32 of the pole 3 is located in the connecting groove 41, so that after the second portion 32 of the pole 3 is welded to the aluminum block 4, the side of the aluminum block 4 facing away from the cover body 1 is relatively flat, which is convenient for stable connection with the external circuit.

[0051] It is understandable that the side surface of the aluminum block 4 facing away from the cover plate body 1 may also be flush with the end surface of the pole 3 facing away from the processed portion 22 , which will not be elaborated here.

[0052] See Figure 4 In some embodiments, the cover assembly further includes an upper plastic 5 and a lower plastic 6. The upper plastic 5 is disposed between the aluminum block 4 and the cover body 1, and the lower plastic 6 is disposed between the cover body 1 and the processing portion 22. In this embodiment, the upper plastic 5 is disposed in a one-to-one correspondence with the aluminum block 4, that is, two upper plastics 5 are provided. The upper plastic 5 is provided with a groove (not shown in the figure) for accommodating the aluminum block 4. The length direction of the lower plastic 6 is parallel to the length direction of the cover body 1. The upper plastic 5 and the lower plastic 6 are both made of insulating material. The pole 3 passes through the lower plastic 6, the cover body 1, the upper plastic 5, and the aluminum block 4 respectively. The first portion 31 is engaged with the lower plastic 6, so that the upper plastic 5 and the lower plastic 6 can be fixedly disposed on the cover body 1.

[0053] In this way, by fixing the aluminum block 4 and the pole 3 and snapping the pin 2 into the cover body 1, the welding process of the pole 3 and the pin 2 can be saved, the connection strength between the pin 2 and the pole 3 can be improved, and the positions of the aluminum block 4, the pole 3, the pin 2, the upper plastic 5 and the lower plastic 6 on the cover body 1 can be limited, thereby improving the assembly efficiency and yield of the cover assembly.

[0054] It is understandable that the arrangement positions of the pole 3 and the lower plastic 6 can be flexibly adjusted, and this embodiment does not limit this.

[0055] See Figure 4 In some embodiments, the cover assembly further includes a sealing ring 7, which is disposed between the pole 3 and the cover body 1. In this embodiment, both sides of the sealing ring 7 abut against the outer wall of the second portion 32 and the cover body 1, respectively.

[0056] It should be noted that when assembling the cover assembly, the pole 3 is stamped on the processing part 22, and the sealing ring 7 is sleeved on the pole 3, and the pole 3 is assembled to the lower plastic 6, so that the second part 32 and the connecting part 21 are respectively arranged on both sides of the lower plastic 6, and the cover body 1, the upper plastic 5, and the aluminum block 4 are assembled in sequence, and the aluminum block 4 and the second part 32 are welded.

[0057] Second, see Figure 1 The present invention also provides a battery comprising a housing (not shown), a battery cell (not shown), and a cover assembly. The housing is connected to the cover body 1, the battery cell is disposed within the housing, and a connecting portion 21 is electrically connected to the battery cell. Pins 2 are disposed within the housing, the battery cell and pins 2 are electrically connected via aluminum foil, and the housing and cover body 1 are fixedly connected.

[0058] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A cover plate assembly, characterized in that: include: Cover plate body (1); A pin (2) and a pole (3), wherein the pin (2) comprises a connecting portion (21) and a processing portion (22), wherein the connecting portion (21) is connected to the battery core, and the processing portion (22) and the pole (3) are integrally formed, and an end of the pole (3) facing away from the connecting portion (21) and the connecting portion (21) are respectively arranged on both sides of the cover plate body (1); An aluminum block (4), the aluminum block (4) being arranged on a side of the cover plate body (1) facing away from the connecting portion (21) and being fixedly connected to the pole (3).

2. The cover plate assembly according to claim 1, wherein: The pole (3) comprises a first portion (31) and a second portion (32), wherein one end of the first portion (31) is connected to the processing portion (22), and the other end is connected to the second portion (32), and one end of the second portion (32) facing away from the first portion (31) is connected to the aluminum block (4), and the minimum cross-sectional area of ​​the first portion (31) is greater than the maximum cross-sectional area of ​​the second portion (32).

3. The cover plate assembly according to claim 2, wherein: The thickness of the end of the second portion (32) facing away from the first portion (31) ranges from 1.5 mm to 2 mm; and / or the thickness of the side wall of the second portion (32) ranges from 0.9 mm to 1.2 mm.

4. The cover plate assembly according to claim 1, wherein: One pin (2) is connected to two connecting portions (21), and the two connecting portions (21) are symmetrically arranged on both sides of the processing portion (22).

5. The cover plate assembly according to claim 1, wherein: The thickness of the processed portion (22) of the pin (2) ranges from 1.4 mm to 2 mm.

6. The cover plate assembly according to any one of claims 1 to 5, characterized in that: The poles (3) are arranged in one-to-one correspondence with the aluminum blocks (4); the poles (3) pass through the aluminum blocks (4) and are welded to a side of the aluminum blocks (4) facing away from the cover plate body (1).

7. The cover plate assembly according to any one of claims 1 to 5, characterized in that: The aluminum block (4) is arranged so that the side surface facing away from the cover plate body (1) protrudes from the end surface of the pole (3) facing away from the processing portion (22).

8. The cover plate assembly according to any one of claims 1 to 5, characterized in that: The cover assembly further comprises an upper plastic (5), which is arranged between the aluminum block (4) and the cover body (1); and / or the cover assembly further comprises a lower plastic (6), which is arranged between the cover body (1) and the processing portion (22).

9. The cover plate assembly according to any one of claims 1 to 5, characterized in that: The cover plate assembly further comprises a sealing ring (7), and the sealing ring (7) is arranged between the pole (3) and the cover plate body (1).

10. A battery, characterized in that: The invention comprises a shell, a battery cell and a cover assembly according to any one of claims 1 to 9, wherein the shell is connected to the cover body (1), the battery cell is arranged inside the shell, and the connecting portion (21) is electrically connected to the battery cell.

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