Battery cover plate and battery monomer

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery cover plate and a battery monomer, the battery cover plate comprises a cover plate body, a riveting block and a pole, the riveting block is arranged on the cover plate body in an insulating manner, one side of the riveting block deviating from the cover plate body is provided with a supporting groove, and the groove bottom of the supporting groove is provided with a first through hole; the distance between the hole wall of the first through hole and the inner wall of the supporting groove is b, and b is larger than or equal to 0.13 mm and smaller than or equal to 0.38 mm. A pole body of the pole penetrates through the cover plate body and the first through hole, a protruding part is arranged on the side wall of the pole body and erected on the groove bottom of the supporting groove, and the side wall of the protruding part abuts against the inner wall of the supporting groove. According to the battery cover plate, the gap defined by the protruding part, the inner wall of the supporting groove and the groove bottom of the supporting groove can be greatly reduced, and the volume of air reserved in the gap is reduced, so that the probability of burst points of a welding seam during welding of a column body and a riveting block can be reduced.

Description

Technical Field

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

[0002] like Figure 1 and Figure 2 As shown, the existing battery cover plate generally includes a cover plate 100', a rivet block 200' and a pole 300', etc. When assembling the battery cover plate, the pole 300' and the rivet block 200' are riveted, the pole 300' swells and a convex ring 310' is formed on its side wall, the convex ring 310' is placed on the support platform 210' of the rivet block 200', and then the pole 300' and the rivet block 200' are welded to fix the pole 300' and the rivet block 200'.

[0003] like Figures 1 to 3 As shown, the width a of the existing support platform 210' is relatively wide (a is usually about 0.5 mm). After the pole 300' is expanded, there is still a large gap 400' between the convex ring 310' and the corner of the support platform 210', and a lot of air remains in the gap 400'. When welding the pole 300' and the rivet block 200', the air in the gap 400' expands due to heat, which easily causes the problem of explosion points in the weld 500'.

[0004] Therefore, it is urgent to provide a battery cover and a battery cell to solve the above technical problems. Utility Model Content

[0005] The first object of the utility model is to provide a battery cover plate, which can reduce the probability of weld explosion points when welding a column and a riveting block.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Battery cover, including:

[0008] Cover plate body;

[0009] A riveting block, the riveting block is insulated and arranged on the cover body, a supporting groove is arranged on the side of the riveting block away from the cover body, a first through hole is arranged at the bottom of the supporting groove, and a distance b between the hole wall of the first through hole and the inner wall of the supporting groove is 0.13 mm ≤ b ≤ 0.38 mm;

[0010] The pole comprises a column body, the column body is penetrated through the cover plate body and the first through hole, the side wall of the column body is provided with a protrusion, the protrusion is laid on the bottom of the supporting groove, and the side wall of the protrusion is in contact with the inner wall of the supporting groove.

[0011] Optionally, a groove bottom of the support groove and an inner wall of the support groove are transitioned through a rounded corner.

[0012] Optionally, the radius of the rounded corner is R, where 0.13 mm ≤ R ≤ 0.38 mm.

[0013] Optionally, a chamfer is provided for the transition between the bottom of the support groove and the inner wall of the support groove.

[0014] Optionally, the angle of the chamfer is θ, where 45° ≤ θ ≤ 60°.

[0015] Optionally, the axis of the first through hole is located at the center of the support groove.

[0016] Optionally, the battery cover plate further includes a plastic part, which is clamped between the riveting block and the cover plate body.

[0017] Optionally, the battery cover plate further includes a sealing ring. The sealing ring includes a first sealing section that is sleeved on the column body. The cover plate body is provided with a second through hole, and the column body passes through the second through hole, and the first sealing section is clamped between the side wall of the column body and the hole wall of the second through hole.

[0018] Optionally, the pole column further includes a support, which is connected to the column body and is located on the side of the cover plate body away from the riveting block. The sealing ring further includes a second sealing section, which is connected to the first sealing section and is clamped between the support and the cover plate body.

[0019] The second object of the present utility model is to provide a battery cell with a high product yield.

[0020] To achieve this object, the present utility model adopts the following technical solutions:

[0021] The battery cell includes a core body, a battery case, and the above-mentioned battery cover plate. The core body is arranged inside the battery case, and the cover plate body covers the opening of the battery case.

[0022] The beneficial effects of the present utility model:

[0023] On the side of the riveting block away from the cover plate body, there is a support groove. The bottom of the support groove is provided with a first through hole. The distance between the hole wall of the first through hole and the inner wall of the support groove is b, where 0.13 mm ≤ b ≤ 0.38 mm. The column body passes through the first through hole. The protruding part on the side wall of the column body is placed on the bottom of the support groove, and the side wall of the protruding part abuts against the inner wall of the support groove. This battery cover plate reduces the distance between the hole wall of the first through hole of the riveting block and the inner wall of the support groove to 0.13 mm to 0.38 mm. Furthermore, the gap formed by enclosing the protruding part, the inner wall of the support groove, and the bottom of the support groove can be significantly reduced, and the volume of air remaining in this gap is reduced. When welding the column body and the riveting block, the probability of weld explosion points can be reduced, which is beneficial to improving the product yield of the battery cover plate.

[0024] The battery cell provided by the present utility model adopts the above-mentioned battery cover plate, and has a relatively high product yield. Description of the Drawings

[0025] Figure 1 is a schematic cross-sectional structure diagram of the battery cover plate before riveting the pole column and the riveting block in the prior art;

[0026] Figure 2 is a schematic cross-sectional structure diagram of the battery cover plate after riveting the pole column and the riveting block in the prior art;

[0027] Figure 3 is Figure 2 a partial enlarged view of part A in

[0028] Figure 4 is a schematic cross-sectional structure diagram of the battery cover plate (after riveting the pole column and the riveting block) provided in the first embodiment;

[0029] Figure 5 is a schematic cross-sectional structure diagram of the riveting block provided in the first embodiment;

[0030] Figure 6 is Figure 4 a partial enlarged view of part B in

[0031] Figure 7 is a schematic cross-sectional structure diagram of the riveting block provided in the second embodiment.

[0032] In the figure:

[0033] 100', cover plate; 200', riveting block; 210', support platform; 300', pole column; 310', convex ring; 400', gap; 500', weld;

[0034] 100, cover plate body; 200, riveting block; 210, support groove; 220, first through hole; 230, fillet; 240, chamfer; 250, gap; 300, pole column; 310, column body; 311, protruding part; 320, support; 400, plastic part; 500, sealing ring; 510, first sealing section; 520, second sealing section. Detailed Embodiments

[0035] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that, for the sake of convenience of description, only parts related to the present utility model are shown in the drawings, rather than all the structures.

[0036] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0038] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0039] Embodiment 1

[0040] This embodiment provides a battery cover plate, which can reduce the probability of weld explosion points when welding the column body and the riveting block.

[0041] Specifically, as Figures 4 to 6As shown in the figure, the battery cover plate includes a cover plate body 100, a riveting block 200, and a pole column 300. Among them, the riveting block 200 is insulatingly arranged on the cover plate body 100. A support groove 210 is provided on the side of the riveting block 200 facing away from the cover plate body 100. A first through hole 220 is provided at the bottom of the support groove 210. The distance between the hole wall of the first through hole 220 and the inner wall of the support groove 210 is b, and 0.13mm ≤ b ≤ 0.38mm. Exemplarily, b can be 0.13mm, 0.15mm, 0.2mm, 0.3mm, 0.35mm, 0.38mm, etc. The pole column 300 includes a column body 310. The column body 310 passes through the cover plate body 100 and the first through hole 220. A protruding portion 311 is provided on the side wall of the column body 310. The protruding portion 311 extends along the circumferential direction of the column body 310 and has a closed-loop structure. The protruding portion 311 is placed on the bottom of the support groove 210, and the side wall of the protruding portion 311 abuts against the inner wall of the support groove 210.

[0042] It should be noted that a protruding portion 311 is provided on the side wall of the column body 310. The protruding portion 311 is placed on the bottom of the support groove 210, and the side wall of the protruding portion 311 abuts against the inner wall of the support groove 210, which is the structural state after the column body 310 and the riveting block 200 are riveted. After the column body 310 and the riveting block 200 are riveted, the edge of the top wall of the column body 310 and the edge of the support groove 210 are welded, and the fixation between the column body 310 and the riveting block 200 can be achieved.

[0043] Based on the above design, a support groove 210 is provided on the side of the riveting block 200 facing away from the cover plate body 100. A first through hole 220 is provided at the bottom of the support groove 210. The distance between the hole wall of the first through hole 220 and the inner wall of the support groove 210 is b, and 0.13mm ≤ b ≤ 0.38mm. The column body 310 passes through the first through hole 220. The protruding portion 311 on the side wall of the column body 310 is placed on the bottom of the support groove 210, and the side wall of the protruding portion 311 abuts against the inner wall of the support groove 210. The battery cover plate reduces the distance between the hole wall of the first through hole 220 of the riveting block 200 and the inner wall of the support groove 210 to 0.13mm to 0.38mm, thereby being able to greatly reduce the gap 250 formed by enclosing the protruding portion 311, the inner wall of the support groove 210, and the bottom of the support groove 210. The volume of the air remaining in the gap 250 is reduced. When welding the column body 310 and the riveting block 200, the probability of weld explosion points can be reduced, which is beneficial to improving the product yield of the battery cover plate.

[0044] Optionally, as Figures 4 to 6As shown, the axis of the first through-hole 220 is located at the center of the support groove 210, and the value of b at different positions in the circumferential direction of the column 310 is the same. Therefore, the size of the above-mentioned gap 250 is the same at different positions along the circumferential direction of the column 310. It can be seen that this structural design can improve the uniformity of the probability of weld explosion points in the circumferential direction of the column 310.

[0045] Optionally, as Figures 4 to 6 shown, the bottom of the support groove 210 and the inner wall of the support groove 210 are transitioned by a fillet 230 to further reduce the above-mentioned gap 250 to further reduce the probability of weld explosion points.

[0046] Further, as Figures 4 to 6 shown, the radius of the fillet 230 is R, and 0.13mm ≤ R ≤ 0.38mm. Exemplarily, R can be 0.13mm, 0.15mm, 0.2mm, 0.3mm, 0.35mm or 0.38mm, etc. If R is less than 0.13mm, the above-mentioned gap 250 will be enlarged, increasing the probability of weld explosion points. If R is greater than 0.38mm, the value of b needs to be increased, and there is also a problem of enlarging the gap 250 and increasing the probability of weld explosion points.

[0047] Optionally, as Figures 4 to 6 shown, the battery cover plate further includes a plastic part 400, and the plastic part 400 is clamped between the riveting block 200 and the cover plate body 100 to achieve insulation between the riveting block 200 and the cover plate body 100.

[0048] Further, as Figures 4 to 6 shown, a limiting groove is provided on the side of the plastic part 400 facing away from the cover plate body 100, and the riveting block 200 is embedded in the limiting groove to achieve the positioning and fixation of the riveting block 200.

[0049] Optionally, as Figures 4 to 6 shown, the battery cover plate further includes a sealing ring 500. The sealing ring 500 includes a first sealing section 510. The first sealing section 510 is sleeved on the column 310. The cover plate body 100 is provided with a second through-hole, and the column 310 passes through the second through-hole, and the first sealing section 510 is clamped between the side wall of the column 310 and the hole wall of the second through-hole to achieve the sealing between the column 310 and the cover plate body 100.

[0050] Further, as Figures 4 to 6As shown, the terminal post 300 further includes a support 320. The support 320 is connected to the column body 310, and the support 320 is located on the side of the cover plate body 100 away from the riveting block 200. The sealing ring 500 further includes a second sealing section 520. The second sealing section 520 is connected to the side of the first sealing section 510 away from the column body 310, and the second sealing section 520 is clamped between the support 320 and the cover plate body 100 to achieve sealing between the support 320 and the cover plate body 100.

[0051] The above-mentioned riveting block 200 can be made of aluminum or other common conductive materials in this field, and no limitation is made here.

[0052] This embodiment also provides a battery cell with a high product yield.

[0053] Specifically, the battery cell includes a core body, a battery case, and the above-mentioned battery cover plate. The core body is arranged in the battery case, and the cover plate body 100 is covered at the opening of the battery case. The battery cell adopts the above-mentioned battery cover plate and has a high product yield.

[0054] Embodiment Two

[0055] This embodiment provides a battery cover plate, and the difference between this battery cover plate and the battery cover plate provided in Embodiment One is as follows:

[0056] As Figure 7 shown, the bottom of the support groove 210 and the inner wall of the support groove 210 are transitioned through a chamfer 240, further reducing the gap 250 formed by enclosing the protruding portion 311, the inner wall of the support groove 210, and the bottom of the support groove 210, so as to reduce the volume of air remaining in the gap 250 and further reduce the probability of weld explosion points during the welding of the column body 310 and the riveting block 200.

[0057] Further, as Figure 7 shown, the angle of the chamfer 240 is θ, 45° ≤ θ ≤ 60°. Exemplarily, θ can be 45°, 50°, or 60°, etc. If θ is less than 45°, the above-mentioned gap 250 will be enlarged, increasing the probability of weld explosion points. If θ is greater than 60, the value of b needs to be increased, and there is also a problem of enlarging the gap 250 and increasing the probability of weld explosion points.

[0058] The remaining structures of the battery cover plate provided in this embodiment are the same as those in Embodiment One and will not be described in detail.

[0059] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A battery cover, characterized in that: include: Cover plate body (100); A riveting block (200), the riveting block (200) being insulated and arranged on the cover plate body (100), a supporting groove (210) being arranged on a side of the riveting block (200) facing away from the cover plate body (100), a first through hole (220) being arranged at the bottom of the supporting groove (210), a distance b between a hole wall of the first through hole (220) and an inner wall of the supporting groove (210), 0.13 mm≤b≤0.38 mm; A pole (300), the pole (300) comprising a column (310), the column (310) being inserted through the cover plate body (100) and the first through hole (220), the side wall of the column (310) being provided with a protrusion (311), the protrusion (311) being mounted on the bottom of the support groove (210), and the side wall of the protrusion (311) being in contact with the inner wall of the support groove (210).

2. The battery cover according to claim 1, characterized in that: A groove bottom of the support groove (210) and an inner wall of the support groove (210) are transitioned via a rounded corner (230).

3. The battery cover according to claim 2, characterized in that: The radius of the rounded corner (230) is R, 0.13 mm ≤ R ≤ 0.38 mm.

4. The battery cover according to claim 1, characterized in that: A chamfer (240) transitions between the groove bottom of the support groove (210) and the inner wall of the support groove (210).

5. The battery cover according to claim 4, characterized in that: The angle of the chamfer (240) is θ, 45°≤θ≤60°.

6. The battery cover according to any one of claims 1 to 5, characterized in that: The axis of the first through hole (220) is located at the center of the supporting groove (210).

7. The battery cover according to any one of claims 1 to 5, characterized in that: The battery cover plate further comprises a plastic part (400), wherein the plastic part (400) is sandwiched between the riveting block (200) and the cover plate body (100).

8. The battery cover according to any one of claims 1 to 5, characterized in that: The battery cover plate also includes a sealing ring (500), the sealing ring (500) includes a first sealing section (510), the first sealing section (510) is sleeved on the column (310), the cover plate body (100) is provided with a second through hole, the column (310) is penetrated through the second through hole, and the first sealing section (510) is clamped between the side wall of the column (310) and the hole wall of the second through hole.

9. The battery cover according to claim 8, characterized in that: The pole (300) further comprises a support (320), wherein the support (320) is connected to the column (310), and the support (320) is located on a side of the cover plate body (100) facing away from the riveting block (200), and the sealing ring (500) further comprises a second sealing section (520), wherein the second sealing section (520) is connected to the first sealing section (510), and the second sealing section (520) is clamped between the support (320) and the cover plate body (100).

10. A battery cell, characterized in that: It comprises a core, a battery shell and a battery cover according to any one of claims 1 to 9, wherein the core is arranged in the battery shell, and the cover body (100) is covered at the opening of the battery shell.

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