Battery top cover and single battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery top cover and a single battery, the battery top cover comprises a top cover sheet, a riveting block and a first plastic part, the riveting block comprises a riveting block body and a first boss, the riveting block body comprises a first surface and a second surface which are oppositely arranged, the first boss is arranged on the first surface in a convex manner, and the first plastic part is arranged on the first surface. The side wall of the first boss is provided with a slope, the slope extends in the circumferential direction of the first boss and is of a closed-loop structure, the slope inclines in the direction from the second surface to the first surface and the direction close to the center of the first boss, the riveting block body can be placed in an injection mold, an annular manufactured part is arranged in the injection mold, and the slope is configured to abut against an annular supporting part. The first plastic part is arranged on the top cover piece, the riveting block body is wrapped with the first plastic part, and the position precision of the riveting block body wrapped with the first plastic part can be improved through the structural arrangement.

Description

Technical Field

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

[0002] The battery top cover includes a top cover sheet, a pole column, a riveting block, an upper plastic, a sealing ring, etc. The pole column and the riveting block are respectively located on both sides of the top cover sheet, and the pole column is connected to the riveting block. The upper plastic is wrapped outside the riveting block to achieve insulation between the riveting block and the top cover sheet. The sealing ring is sleeved on the outer wall of the pole column to achieve insulation between the pole column and the top cover sheet.

[0003] In the related art, an injection molding process is often used to wrap the upper plastic outside the riveting block. During actual production, the upper mold and the lower mold of the injection mold are opened, then the riveting block is placed in the lower mold, the upper mold and the lower mold are closed, and then a colloidal plastic is injected into the lower mold. After the colloidal plastic is cured, the upper plastic is formed.

[0004] However, when the riveting block is placed in the lower mold, the problem of skewing of the riveting block easily occurs, which reduces the positional accuracy of the upper plastic wrapped on the riveting block, making it impossible to guarantee the insulation between the riveting block and the top cover sheet.

[0005] Therefore, there is an urgent need to propose a battery top cover and a single cell battery to solve the above technical problems. Summary of the Utility Model

[0006] The first object of the utility model is to provide a battery top cover, which can improve the positional accuracy of the first plastic part wrapped on the riveting block body, thereby guaranteeing the insulation between the riveting block body and the top cover sheet.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] A battery top cover, comprising:

[0009] A top cover sheet;

[0010] A riveting block, the riveting block includes a riveting block body and a first boss. The riveting block body includes a first surface and a second surface arranged opposite to each other. The first boss protrudes from the first surface. A slope is provided on the side wall of the first boss. The slope extends along the circumferential direction of the first boss and forms a closed-loop structure. Along the direction from the second surface towards the first surface, the slope is inclined towards the direction close to the center of the first boss. The riveting block body can be placed in an injection mold, and an annular support is provided in the injection mold. The slope is configured to abut against the annular support;

[0011] A first plastic part, the first plastic part is arranged on the top cover sheet and wraps the riveting block body.

[0012] Optionally, the angle between the slope surface and the first surface is 40°-70°.

[0013] Optionally, the first plastic part is also wrapped on the slope surface.

[0014] Optionally, a first groove is provided on the riveting block body, a first limiting portion is protruding on the inner wall of the first groove, a second limiting portion is protruding on the first plastic part, a second groove is provided on the side wall of the second limiting portion, the second limiting portion is embedded in the first groove, and the first limiting portion is embedded in the second groove.

[0015] Optionally, the first limiting portion extends along the circumference of the first groove and is in a closed loop structure, and the second groove extends along the circumference of the second limiting portion and is in a closed loop structure.

[0016] Optionally, there are multiple first grooves and multiple second limiting portions in one-to-one correspondence, and the multiple first grooves are evenly distributed along the circumference of the riveting block body.

[0017] Optionally, the first groove is opened on the second surface.

[0018] Optionally, the battery top cover further comprises a pole, which is located on a side of the top cover sheet away from the first plastic part, and the pole passes through the top cover sheet and the first plastic part and is connected to the riveting block body.

[0019] Optionally, one of the pole and the riveting block body is provided with a connecting groove, and the other is provided with a protrusion, and the protrusion is inserted into the connecting groove.

[0020] The second object of the utility model is to provide a single cell, wherein the rivet block body and the top cover sheet of the single cell have relatively reliable insulation.

[0021] To achieve this purpose, the utility model adopts the following technical solutions:

[0022] The single battery comprises a battery shell, a battery core and the above-mentioned battery top cover, wherein the battery core is arranged in the battery shell, and the top cover sheet is arranged at the opening of the battery shell.

[0023] Beneficial effects of the utility model:

[0024] The battery top cover provided by the utility model has a first boss provided on the first surface of the riveted block body, and a side wall of the first boss is provided with a slope extending along the circumferential direction of the first boss and forming a closed-loop structure. The slope is inclined in a direction close to the center of the first boss along the direction from the second surface of the riveted block body toward the first surface. When the riveted block body is placed in the injection mold, the slope of the closed-loop structure abuts against the annular support member, thereby reducing the probability of the riveted block body being skewed in the injection mold, thereby improving the position accuracy of the first plastic part wrapped around the riveted block body, and ensuring the insulation between the riveted block body and the top cover sheet.

[0025] The single cell provided by the present utility model adopts the above-mentioned battery top cover, and the position accuracy of the first plastic part wrapped on the riveting block body is relatively high, thereby improving the insulation reliability between the riveting block body and the top cover sheet. Description of the Drawings

[0026] Figure 1 is an exploded structural schematic diagram of the battery top cover provided in this embodiment;

[0027] Figure 2 is a structural schematic diagram of the battery top cover provided in this embodiment;

[0028] Figure 3 is a structural schematic diagram of the riveting block provided in this embodiment Figure 1 ;

[0029] Figure 4 is a structural schematic diagram of the first plastic part provided in this embodiment;

[0030] Figure 5 is a structural schematic diagram of the riveting block provided in this embodiment Figure 2 ;

[0031] Figure 6 is a cross-sectional structural schematic diagram of the riveting block and the first plastic part provided in this embodiment;

[0032] Figure 7 is a structural schematic diagram of the pole column provided in this embodiment.

[0033] In the figure:

[0034] 100, top cover sheet; 200, riveting block; 210, riveting block body; 211, first surface; 212, second surface; 213, first groove; 2131, first limiting part; 214, protruding part; 220, first boss; 221, slope surface; 230, second boss; 300, first plastic part; 310, second limiting part; 311, second groove; 400, pole column; 410, connecting groove; 500, sealing ring; 600, explosion-proof valve; 700, second plastic part. 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 description, only parts related to the present utility model are shown in the drawings, rather than all 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 therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating 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 the first feature being directly below and obliquely below the second feature, or merely indicating 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] This embodiment provides a battery top cover, which can improve the position accuracy of the first plastic part wrapped around the riveting block body, thereby ensuring the insulation between the riveting block body and the top cover sheet.

[0040] Specifically, as Figures 1 to 3As shown, the battery top cover includes a top cover sheet 100, a riveting block 200, and a first plastic part 300. Among them, the riveting block 200 includes a riveting block body 210 and a first boss 220. The riveting block body 210 includes a first surface 211 and a second surface 212 arranged opposite to each other. The first boss 220 protrudes from the first surface 211. A slope 221 is provided on the side wall of the first boss 220. The slope 221 extends along the circumferential direction of the first boss 220 and forms a closed-loop structure. Along the direction from the second surface 212 towards the first surface 211, the slope 221 is inclined towards the direction close to the center of the first boss 220. The riveting block body 210 can be placed into an injection mold (not shown in the figure). An annular support is provided in the injection mold. The slope 221 is configured to abut against the annular support. The first plastic part 300 is arranged on the top cover sheet 100, and the first plastic part 300 wraps around the riveting block body 210.

[0041] The injection mold for preparing the first plastic part 300 generally includes an upper mold and a lower mold. The upper mold and the lower mold are detachably snap-connected. The above-mentioned annular support is arranged in the lower mold. When the first surface 211 of the riveting block body 210 faces the lower mold and the riveting block body 210 is placed into the lower mold, the production worker holds the riveting block body 210 and places the riveting block body 210 into the lower mold. When the slope 221 of the closed-loop structure contacts the annular support, the production worker releases the riveting block body 210. Under the action of gravity, the riveting block body 210 continues to move downward into the lower mold. At this time, the annular support slides relative to the slope 221 of the closed-loop structure until the annular support abuts against the slope 221 of the closed-loop structure, and the riveting block body 210 stops moving. Since the slope 221 of the closed-loop structure abuts against the annular support, the probability of the riveting block body 210 being skewed in the lower mold can be reduced. Furthermore, the position accuracy of the first plastic part 300 wrapping around the riveting block body 210 can be improved, which plays a role in ensuring the insulation between the riveting block body 210 and the top cover sheet 100. And, for the technical solution provided in this embodiment, after the production worker places the riveting block body 210 into the lower mold, the problem of the riveting block body 210 being skewed in the lower mold can be solved by the annular support abutting against the slope 221 of the closed-loop structure. Therefore, there is no need for the production worker to manually adjust the position of the riveting block body 210 in the lower mold, which has the effects of simplifying the production operation and improving the production efficiency.

[0042] It should be noted that the specific structures of the above-mentioned upper mold and lower mold are all prior arts and will not be elaborated here.

[0043] Preferably, the first boss 220, the riveting block body 210, and the annular support are coaxial. When the riveting block body 210 stops sliding in the lower mold, this structural design can maintain the balance of the riveting block body 210 and further prevent the riveting block body 210 from being skewed.

[0044] Optionally, the included angle between the slope surface 221 and the first surface 211 is 40° - 70°. Exemplarily, the included angle between the slope surface 221 and the first surface 211 can be 40°, 45°, 60° or 70°, etc., so that the riveting block body 210 can be smoothly and gently placed into the lower die, that is, the sliding of the annular support member relative to the slope surface 221 is smooth and gentle.

[0045] Optionally, as Figures 1 to 3 shown, the first plastic part 300 also wraps around the slope surface 221, thereby expanding the volume of the first plastic part 300 wrapped on the riveting block 200, improving the reliability of the connection between the first plastic part 300 and the riveting block 200, and also expanding the volume of the first plastic part 300, having the effect of improving the structural strength of the first plastic part 300. In addition, when welding the riveting block 200 and the pole column 400, heat is usually dissipated through the first plastic part 300. The design of expanding the volume of the first plastic part 300 is beneficial to improving the heat dissipation efficiency of the first plastic part 300.

[0046] Optionally, as Figures 1 to 6 shown, a first groove 213 is provided on the riveting block body 210, a first limiting portion 2131 protrudes from the inner wall of the first groove 213, a second limiting portion 310 protrudes from the first plastic part 300, a second groove 311 is provided on the side wall of the second limiting portion 310, the second limiting portion 310 is embedded in the first groove 213, and the first limiting portion 2131 is embedded in the second groove 311, thereby preventing the problem of warping of the first plastic part 300 during curing. When the first plastic part 300 has a tendency to deform, the first limiting portion 2131 can limit the inner wall of the second groove 311 to prevent the first plastic part 300 from deforming and warping, and thus can improve the reliability and stability of the first plastic part 300 wrapping the riveting block 200.

[0047] It should be noted that the groove depth of the first groove 213, the groove width of the first groove 213, the groove depth of the second groove 311, the groove width of the second groove 311, the volume of the first limiting portion 2131 and the volume of the second limiting portion 310 can all be determined according to actual application requirements and production requirements, and will not be elaborated here.

[0048] Furthermore, as Figures 1 to 6 shown, the first limiting portion 2131 extends along the circumferential direction of the first groove 213 and is in a closed-loop structure, and the second groove 311 extends along the circumferential direction of the second limiting portion 310 and is in a closed-loop structure to improve the limiting effect of the first limiting portion 2131 on the inner wall of the second groove 311.

[0049] Even further, as Figures 1 to 6As shown, the number of the first grooves 213 and the second limiting parts 310 is multiple and they correspond to each other one by one. The multiple first grooves 213 are evenly distributed along the circumferential direction of the riveting block body 210, so as to further reduce the probability of deformation and warping of the first plastic part 300. In this embodiment, the number of the first grooves 213 is four. In other implementation schemes, the number of the first grooves 213 can also be two, three, five, etc.

[0050] Preferably, as Figures 1 to 6 shown, the first grooves 213 are formed on the second surface 212. Since the first convex platform 220 protrudes from the first surface 211 of the riveting block body 210, the volume of the first plastic part 300 wrapped on the first surface 211 is small. If the first plastic part 300 is deformed, the probability of deformation and warping of the first plastic part 300 wrapped on the first surface 211 and the slope surface 221 is relatively large. If the first plastic part 300 in this area is deformed and warped, a gap will be generated between the first plastic part 300 and the first surface 211 and the slope surface 221, that is, the first plastic part 300 will be deformed and warped in the direction away from the second surface 212. In this embodiment, the first grooves 213 are formed on the second surface 212, which is beneficial for the first limiting part 2131 to apply a force towards the second surface 212 on the inner wall of the second groove 311, thereby preventing the first plastic part 300 from being deformed and warped in the direction away from the second surface 212.

[0051] Optionally, as Figures 1 to 6 shown, the battery top cover further includes a pole column 400. The pole column 400 is located on the side of the top cover sheet 100 away from the first plastic part 300. The pole column 400 penetrates through the top cover sheet 100 and the first plastic part 300 and is connected to the riveting block body 210 to realize the connection between the pole column 400 and the riveting block body 210.

[0052] Furthermore, as Figures 1 to 7 shown, a connection groove 410 is provided on the side of the pole column 400 facing the riveting block body 210, and a protruding part 214 is provided on the side of the riveting block body 210 facing the pole column 400. The protruding part 214 is inserted into the connection groove 410. This structural design can expand the connection area between the pole column 400 and the riveting block body 210, thereby improving the reliability of their connection, and can also increase the maximum current passing amount between the pole column 400 and the riveting block body 210.

[0053] In other implementation schemes, the protruding part 214 can also be provided on the side of the pole column 400 facing the riveting block body 210, and the connection groove 410 can be provided on the side of the riveting block body 210 facing the pole column 400, which can be determined according to actual application requirements.

[0054] Optionally, as Figures 1 to 7As shown, the riveting block 200 further includes a second boss 230. The second boss 230 protrudes from a side of the first boss 220 facing away from the first surface 211, and the second boss 230 protrudes from the first plastic part 300. The second boss 230 is used for electrically connecting to other electrical components outside the single cell.

[0055] Optionally, as Figures 1 to 7 shown, the battery top cover further includes a sealing ring 500, an explosion-proof valve 600, a second plastic part 700, and a polyethylene terephthalate (PET) patch (not shown in the figure). Among them, the sealing ring 500 is sleeved on the pole post 400 so that the pole post 400 and the top cover sheet 100 are hermetically connected through the sealing ring 500. The explosion-proof valve 600 is arranged on the top cover sheet 100. The second plastic part 700 covers the surface of the top cover sheet 100 on the side facing away from the first plastic part 300. The PET patch is attached to the surface of the top cover sheet 100 on the side facing away from the second plastic part 700.

[0056] The riveting block 200 in this embodiment is made of an aluminum block. Of course, other materials can also be selected in other implementation schemes, which can be determined according to actual applications and production requirements.

[0057] In this embodiment, there are two pole posts 400, sealing rings 500, first plastic parts 300, and riveting blocks 200 respectively and they correspond to each other one by one. One of the two pole posts 400 is a positive pole post and the other is a negative pole post.

[0058] This embodiment also provides a single cell. There is relatively reliable insulation between the riveting block body 210 of the single cell and the top cover sheet 100.

[0059] Specifically, the single cell includes a battery case, an electric core, and the above-mentioned battery top cover. The electric core is arranged in the battery case, and the top cover sheet 100 covers the opening of the battery case. The single cell adopts the above-mentioned battery top cover. The position accuracy of the first plastic part 300 wrapped on the riveting block body 210 is relatively high, thereby improving the insulation reliability between the riveting block body 210 and the top cover sheet 100.

[0060] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the present invention, rather than limiting the implementation manners of the present invention. 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 invention. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. Battery top cover, characterized in that, include: Top cover sheet (100); A riveting block (200), the riveting block (200) comprising a riveting block body (210) and a first boss (220), the riveting block body (210) comprising a first surface (211) and a second surface (212) arranged opposite to each other, the first boss (220) being convexly arranged on the first surface (211), a slope (221) being arranged on a side wall of the first boss (220), the slope (221) extending along the circumference of the first boss (220) and presenting a closed loop structure, and in a direction from the second surface (212) toward the first surface (211), the slope (221) is inclined toward a direction close to the center of the first boss (220), the riveting block body (210) being capable of being placed in an injection mold, the injection mold being provided with an annular support, the slope (221) being configured to abut against the annular support; A first plastic part (300), wherein the first plastic part (300) is arranged on the top cover sheet (100), and the first plastic part (300) is wrapped on the riveting block body (210).

2. The battery top cover according to claim 1, wherein The included angle between the slope surface (221) and the first surface (211) is 40°-70°.

3. The battery top cover according to claim 1, characterized in that The first plastic part (300) is also wrapped on the slope surface (221).

4. The battery top cover according to any one of claims 1-3, characterized in that, The riveting block body (210) is provided with a first groove (213), the inner wall of the first groove (213) is provided with a first limiting portion (2131), the first plastic part (300) is provided with a second limiting portion (310), the side wall of the second limiting portion (310) is provided with a second groove (311), the second limiting portion (310) is embedded in the first groove (213), and the first limiting portion (2131) is embedded in the second groove (311).

5. The battery top cover according to claim 4, characterized in that, The first limiting portion (2131) extends along the circumference of the first groove (213) and is in a closed loop structure, and the second groove (311) extends along the circumference of the second limiting portion (310) and is in a closed loop structure.

6. The battery top cover according to claim 4, characterized in that, The number of the first grooves (213) and the number of the second limiting portions (310) are both multiple and one-to-one corresponding, and the multiple first grooves (213) are evenly distributed along the circumference of the riveting block body (210).

7. The battery top cover according to claim 4, characterized in that, The first groove (213) is opened on the second surface (212).

8. The battery top cover according to any one of claims 1-3, characterized in that, The battery top cover also includes a pole (400), the pole (400) being located on a side of the top cover sheet (100) away from the first plastic part (300), the pole (400) penetrating the top cover sheet (100) and the first plastic part (300) and connected to the riveting block body (210).

9. The battery top cover according to claim 8, wherein, One of the pole (400) and the riveting block body (210) is provided with a connecting groove (410), and the other is provided with a protruding portion (214), and the protruding portion (214) is inserted into the connecting groove (410).

10. A single cell, characterized in that, It includes a battery case, a battery cell, and the battery top cover according to any one of claims 1-9. The battery cell is disposed inside the battery case, and the top cover sheet (100) is covered on the opening of the battery case.

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