Cover plate assembly and battery monomer

Abstract

The utility model belongs to the technical field of batteries, and discloses a cover plate assembly and a battery monomer. The cover plate assembly comprises a cover plate sheet, a pole and a pin. And a first mounting hole is formed in the cover plate sheet. The pole comprises a pole body, a base plate and a first connecting part which are sequentially connected from top to bottom, the radial size of the pole body and the radial size of the first connecting part are both smaller than that of the base plate, the pole body penetrates through the first mounting hole, and the base plate abuts against the bottom of the cover plate sheet. The first connecting part is sleeved with the pin and abuts against the bottom of the base plate, the edge of the bottom of the first connecting part is turned outwards to form a riveting part, and the riveting part is riveted to the bottom of the pin. The cover plate assembly can realize riveting fixation of the pins, so that the cover plate assembly is good in insulation sealing performance and low in cost. The single battery comprises the battery cell, the shell and the cover plate assembly, the battery cell is located in the shell, the cover plate assembly covers the opening of the shell, the insulation sealing performance is good, and the cost is low.

Description

Technical Field

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

[0002] Typically, a lithium battery consists of a casing, a cell, and a cover. The cover features terminals that connect the internal and external circuits. The terminals, located within the casing, are connected to pins. These pin connections require laser welding. The high heat from laser welding can affect the insulation sheet and sealing ring, reducing the product's insulation and sealing properties. Laser welding also increases costs.

[0003] Therefore, there is an urgent need to provide a cover plate assembly and a battery cell to solve the above problems. Utility Model Content

[0004] The first purpose of the utility model is to provide a cover plate assembly, which can realize riveting and fixing of pins, so that the cover plate assembly has good insulation and sealing performance and low cost.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] Cover assembly, including:

[0007] A cover plate, wherein the cover plate is provided with a first mounting hole;

[0008] A pole, the pole comprising a column, a base, and a first connecting portion connected sequentially from top to bottom, wherein the radial dimensions of the column and the first connecting portion are both smaller than the radial dimensions of the base, the column is provided with the first mounting hole, and the base abuts against the bottom of the cover plate;

[0009] The pin is sleeved on the first connecting portion and abuts against the bottom of the chassis. The bottom edge of the first connecting portion is turned outward to form a riveted portion, and the riveted portion is riveted to the bottom of the pin.

[0010] As an optional technical solution for the cover assembly, a first groove is provided at the bottom of the pin, the riveted portion is riveted to the first groove, and the thickness of the riveted portion is less than or equal to the depth of the first groove.

[0011] As an optional technical solution for the cover assembly, the cover assembly also includes a sealing ring, which is sleeved on the column, a part of the sealing ring is clamped between the column and the wall of the first mounting hole, and another part of the sealing ring is clamped between the cover plate and the chassis.

[0012] As an optional technical solution for the cover assembly, the cover assembly further includes an aluminum block, which is provided with a second mounting hole. The aluminum block is arranged above the cover plate, and the column passes through the second mounting hole and is connected to the aluminum block.

[0013] As an optional technical solution for the cover plate assembly, a second connecting portion is provided on the outer periphery of the upper end of the column, the second mounting hole is a stepped hole, and the pole and the aluminum block are riveted together through the second connecting portion and the stepped hole.

[0014] As an optional technical solution for the cover plate assembly, the cover plate assembly further includes a rubber package, the rubber package is located on the upper end surface of the cover plate, and the rubber package is provided on the column and wrapped around the outside of the aluminum block.

[0015] As an optional technical solution for the cover assembly, a plurality of first plug posts are provided on one of the bottom of the aluminum block and the inner end surface of the rubber-coated portion, and a plurality of first plug holes are provided on the other, and the first plug posts are inserted into the corresponding first plug holes.

[0016] As an optional technical solution for the cover assembly, a plurality of second plug posts are provided on one of the bottom of the rubber package and the upper end surface of the cover sheet, and a plurality of second plug holes are provided on the other, and the second plug posts are inserted into the second plug holes.

[0017] As an optional technical solution for the cover assembly, the cover assembly also includes a lower plastic, which is provided with a third mounting hole. The lower plastic is clamped between the cover plate and the pin, and the chassis is connected to the lower plastic through the third mounting hole.

[0018] The second object of the present invention is to provide a battery cell with good insulation and sealing performance and low cost.

[0019] To achieve this purpose, the present invention adopts the following technical solutions:

[0020] A battery cell comprises a battery core, a shell and the above-mentioned cover plate assembly, wherein the battery core is located in the shell and the cover plate assembly is covered at the shell opening.

[0021] Beneficial effects of the utility model:

[0022] The cover assembly provided by the present invention includes a cover plate, a pole and a pin. A first mounting hole is provided on the cover plate. The pole includes a column, a chassis and a first connecting portion. The column is provided with the first mounting hole, and the chassis abuts against the bottom of the cover plate, so that the pole can be passed through the first mounting hole from the bottom of the cover plate upward, thereby realizing the assembly of the pole from bottom to top. The pin is sleeved on the first connecting portion and abuts against the bottom of the chassis. The bottom edge of the first connecting portion is turned outward to form a riveted portion, and the riveted portion is riveted to the bottom of the pin to realize the riveted connection between the pin and the pole, thereby realizing the fixation of the pin. Compared with the laser welding fixation of the pin in the prior art, the pin is fixed by riveting to avoid the influence of the heat of laser welding on the insulating parts and sealing parts, etc., thereby improving the insulation and sealing of the cover assembly and having low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a cross-sectional view of a cover plate assembly provided by an embodiment of the present utility model;

[0024] Figure 2 This is a schematic structural diagram of a cover plate piece of a cover plate assembly provided by an embodiment of the present utility model;

[0025] Figure 3 This is a schematic structural diagram of a pole of a cover plate assembly provided by an embodiment of the present utility model;

[0026] Figure 4 This is a schematic structural diagram of the pins of the cover assembly provided by an embodiment of the present utility model;

[0027] Figure 5 This is a schematic structural diagram of an aluminum block of a cover plate assembly provided by an embodiment of the present utility model;

[0028] Figure 6 This is a schematic diagram of the rubberized structure of the cover assembly provided by the embodiment of the utility model. Figure 1 ;

[0029] Figure 7 This is a schematic diagram of the rubberized structure of the cover assembly provided by the embodiment of the utility model. Figure 2 .

[0030] In the picture:

[0031] 100, cover plate; 110, first boss; 101, first mounting hole; 102, second plug hole; 200, pole; 210, column; 220, chassis; 230, first connecting part; 240, riveted part; 250, second connecting part; 300, pin; 301, first groove; 400, sealing ring; 500, aluminum block; 501, second mounting hole; 502, first plug hole; 600, rubber coating; 610, first plug column; 620, second plug column; 700, lower plastic. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] The cover plate assembly provided in this embodiment can realize riveting fixation of the pins, so that the cover plate assembly has good insulation and sealing properties and low cost.

[0037] Specific as Figure 1 、 Figure 2 and Figure 3As shown, the cover plate assembly includes a cover plate 100, a terminal 200, and a pin 300. The cover plate 100 is provided with a first mounting hole 101. The terminal 200 includes a column 210, a base 220, and a first connecting portion 230, which are connected in sequence from top to bottom. The radial dimensions of the column 210 and the first connecting portion 230 are both smaller than the radial dimensions of the base 220. The column 210 passes through the first mounting hole 101, and the base 220 abuts the bottom of the cover plate 100. The pin 300 is sleeved on the first connecting portion 230 and abuts the bottom of the base 220. The bottom edge of the first connecting portion 230 is turned outward to form a rivet 240, which is riveted to the bottom of the pin 300.

[0038] Based on the above design, the cover plate 100 is provided with a first mounting hole 101. The pole 200 includes a column 210, a base plate 220, and a first connecting portion 230. The column 210 is provided with the first mounting hole 101, and the base plate 220 abuts the bottom of the cover plate 100. This allows the pole 200 to be inserted upward through the first mounting hole 101 from the bottom of the cover plate 100, thereby enabling the pole 200 to be assembled from the bottom up. The pin 300 is sleeved on the first connecting portion 230 and abuts the bottom of the base plate 220. The bottom edge of the first connecting portion 230 is turned outward to form a rivet 240, which is riveted to the bottom of the pin 300, achieving a riveted connection between the pin 300 and the pole 200, thereby securing the pin 300. Compared to the laser welding method used in the prior art to secure the pin 300, this riveting method can avoid the effects of laser welding heat on insulating components and seals, improve the insulation and sealing performance of the cover assembly, and reduce costs.

[0039] It should be noted that since both the pole 200 and the pin 300 are conductors, riveting can also achieve electrical connection between the pole 200 and the pin 300. Furthermore, the first connecting portion 230 can be a hollow tubular structure, which helps reduce the weight of the pole 200 and, in turn, the weight of the cover assembly, thereby better meeting the battery energy density requirements.

[0040] Furthermore, if Figure 4 As shown, a first groove 301 is provided at the bottom of the pin 300, and the rivet portion 240 is riveted to the first groove 301, thereby increasing the riveting strength between the pin 300 and the first connecting portion 230. The thickness of the rivet portion 240 is less than or equal to the depth of the first groove 301, which helps to reduce the overall thickness of the cover assembly and improve the energy density of the battery.

[0041] In this embodiment, the thickness of the rivet portion 240 is smaller than the thickness of the column 210 , which can reduce the hardness of the rivet portion 240 , facilitate the forming of the rivet portion 240 when assembling the pole 200 , and reduce the difficulty of operation for the staff.

[0042] Furthermore, in this embodiment, the radial dimension of the riveted portion 240 is also smaller than the radial dimension of the column 210 .

[0043] In order to insulate and isolate the pole 200 from the cover plate 100, and to increase the sealing performance of the cover plate assembly, the cover plate assembly also includes a sealing ring 400, which is sleeved on the column 210, with a portion of the sealing ring 400 clamped between the column 210 and the wall of the first mounting hole 101, and another portion of the sealing ring 400 clamped between the cover plate 100 and the chassis 220.

[0044] like Figure 1 and Figure 5 As shown, the cover assembly further includes an aluminum block 500 , which is provided with a second mounting hole 501 . The aluminum block 500 is disposed above the cover plate 100 , and the column 210 passes through the second mounting hole 501 and is connected to the aluminum block 500 to increase the fixing performance of the pole 200 .

[0045] Furthermore, a second connecting portion 250 is provided around the outer periphery of the upper end of the column 210 , and the second mounting hole 501 is a stepped hole. The pole 210 and the aluminum block 500 are riveted together through the second connecting portion 250 and the stepped hole, thereby increasing the fixity of the pole 200 .

[0046] In this embodiment, the upper end surface of the second connecting portion 250 is lower than the upper end surface of the aluminum block 500 , that is, the pole 200 is embedded in the aluminum block 500 , thereby increasing protection for the pole 200 .

[0047] Alternatively, as Figure 1 、 Figure 6 and Figure 7 As shown, the cover assembly also includes a rubber coating 600, which is located on the upper end surface of the cover sheet 100. The rubber coating 600 is sleeved on the column 210 and wrapped around the outside of the aluminum block 500, insulating and isolating the aluminum block 500 from the cover sheet 100, thereby increasing the insulation and sealing performance of the cover assembly.

[0048] It should be noted that the sealing ring 400 is partially sandwiched between the column 210 and the rubber coating 600 .

[0049] Furthermore, in order to increase the connection strength between the rubber coating 600 and the aluminum block 500, a plurality of first pins 610 are provided on one of the bottom of the aluminum block 500 and the inner end surface of the rubber coating 600, and a plurality of first sockets 502 are provided on the other, and the first pins 610 are inserted into the corresponding first sockets 502.

[0050] The number of the first plug posts 610 can be one, two, three, four, etc., which is not specifically limited in the present invention and can be set according to actual needs.

[0051] In this embodiment, the first plug post 610 is located on the inner end surface of the rubber coating 600 , and the first plug hole 502 is located in the aluminum block 500 , thereby reducing the weight of the aluminum block 500 .

[0052] Similarly, in order to increase the connection strength between the rubber laminating 600 and the cover plate 100 , a plurality of second plug posts 620 are provided on one of the bottom of the rubber laminating 600 and the upper end surface of the cover plate 100 , and a plurality of second insertion holes 102 are provided on the other end, and the second plug posts 620 are inserted into the second insertion holes 102 .

[0053] The number of the second plug posts 620 can be one, two, three, four, etc., which is not specifically limited in the present invention and can be set according to actual needs.

[0054] In this embodiment, the second plug post 620 is located at the bottom of the rubber package 600 , and the second plug hole 102 is located on the upper end surface of the cover plate 100 , thereby reducing the weight of the cover plate 100 .

[0055] It should be noted that the second insertion holes 102 are arranged at intervals along the outer circumference of the first mounting hole 101 , and each second insertion hole 102 is directly opposite to the corresponding first insertion hole 502 .

[0056] In this embodiment, there are four second insertion holes 102 , and the four second insertion holes 102 are symmetrical about the center of the first mounting hole 101 .

[0057] Furthermore, a first boss 110 is provided on the upper end surface of the cover plate 100 along the outer circumference of the first mounting hole 101, and the second insertion hole 102 is located on the first boss 110, thereby increasing the structural strength around the first mounting hole 101 of the cover plate 100 and compensating for the structural strength loss caused by the setting of the second insertion hole 102.

[0058] Continue as Figure 1 As shown, the cover assembly also includes a lower plastic 700, which is provided with a third mounting hole. The lower plastic 700 is clamped between the cover plate 100 and the pin 300, insulating and isolating the cover plate 100, and the chassis 220 is connected to the lower plastic 700 through the third mounting hole.

[0059] In this embodiment, a second groove is provided at the bottom of the cover plate 100 along the outer circumference of the first mounting hole 101, and a second boss is provided on the upper end surface of the lower plastic 700. The second boss is clamped in the second groove, thereby increasing the connection strength between the lower plastic 700 and the cover plate 100 and also increasing the insulation isolation of the cover plate 100.

[0060] This embodiment also provides a battery cell with good insulation and sealing properties and low cost.

[0061] Specifically, the battery cell includes a cell, a housing, and the aforementioned cover assembly, wherein the cell is located within the housing and the cover assembly covers the housing opening. Due to the good insulation and sealing performance and low cost of the cover assembly, the battery cell has good insulation and sealing performance and low cost.

[0062] The cover plate assembly in this embodiment is square. In other embodiments, the cover plate assembly can also be circular, oval, etc., and the present invention does not make specific restrictions on this.

[0063] In this embodiment, the housing is a pole cylinder structure. In other embodiments, it can also be other structural forms, which are not specifically limited by the present invention.

[0064] 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. Cover plate assembly, characterized in that, include: A cover plate (100), wherein the cover plate (100) is provided with a first mounting hole (101); A pole (200), the pole (200) comprising a column (210), a chassis (220), and a first connecting portion (230) connected sequentially from top to bottom, the radial dimensions of the column (210) and the radial dimensions of the first connecting portion (230) being smaller than the radial dimensions of the chassis (220), the column (210) being provided with the first mounting hole (101), and the chassis (220) being in contact with the bottom of the cover plate (100); A pin (300) is sleeved on the first connecting portion (230) and abuts against the bottom of the chassis (220); the bottom edge of the first connecting portion (230) is turned outward to form a riveted portion (240); and the riveted portion (240) is riveted to the bottom of the pin (300).

2. The cover plate assembly according to claim 1, wherein: A first groove (301) is provided at the bottom of the pin (300), the riveted portion (240) is riveted to the first groove (301), and the thickness of the riveted portion (240) is less than or equal to the depth of the first groove (301).

3. The cover plate assembly according to claim 1, wherein: The cover plate assembly further comprises a sealing ring (400), wherein the sealing ring (400) is sleeved on the column (210), a portion of the sealing ring (400) is sandwiched between the column (210) and the wall of the first mounting hole (101), and another portion of the sealing ring (400) is sandwiched between the cover plate (100) and the chassis (220).

4. The cover plate assembly according to claim 1, wherein: The cover plate assembly further comprises an aluminum block (500), the aluminum block (500) being provided with a second mounting hole (501), the aluminum block (500) being arranged above the cover plate sheet (100), and the column (210) passing through the second mounting hole (501) and connected to the aluminum block (500).

5. The cover plate assembly according to claim 4, wherein: A second connecting portion (250) is provided on the outer periphery of the upper end portion of the column (210); the second mounting hole (501) is a stepped hole; the column (210) and the aluminum block (500) are riveted together through the second connecting portion (250) and the stepped hole.

6. The cover plate assembly according to claim 4, wherein: The cover plate assembly further includes a rubber bag (600), the rubber bag (600) is located on the upper end surface of the cover plate sheet (100), and the rubber bag (600) is sleeved on the column (210) and wrapped around the outside of the aluminum block (500).

7. The cover plate assembly according to claim 6, wherein: A plurality of first plug posts (610) are provided on one of the bottom of the aluminum block (500) and the inner end surface of the rubber bag (600), and a plurality of first plug holes (502) are provided on the other, wherein the first plug posts (610) are inserted into the corresponding first plug holes (502).

8. The cover plate assembly according to claim 6, wherein: A plurality of second plug posts (620) are provided on one of the bottom of the rubber package (600) and the upper end surface of the cover plate (100), and a plurality of second plug holes (102) are provided on the other, and the second plug posts (620) are inserted into the second plug holes (102).

9. The cover plate assembly according to claim 1, wherein: The cover assembly further comprises a lower plastic (700), a third mounting hole being provided on the lower plastic (700), the lower plastic (700) being sandwiched between the cover plate (100) and the pin (300), and the chassis (220) being connected to the lower plastic (700) through the third mounting hole.

10. A battery cell, characterized in that It comprises a battery cell, a shell and the cover plate assembly according to any one of claims 1 to 9, wherein the battery cell is located in the shell, and the cover plate assembly is covered at the shell opening.

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