Battery cover plate and single battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery cover plate and a single battery, the battery cover plate comprises a cover plate body, an overturning sheet, a riveting block and an adjusting assembly, the cover plate body is provided with a first through hole, the overturning sheet comprises a contact part, the contact part is in conductive movable connection with the cover plate body, the riveting block is arranged on one side of the cover plate body deviating from the contact part, and the adjusting assembly is arranged on the riveting block. The adjusting assembly comprises an adjusting piece, the adjusting piece is movably connected with the riveting block in a conductive mode, the orthographic projection of the adjusting piece on the cover plate body and the orthographic projection of the contact part on the cover plate body at least partially coincide and are both located in the first through hole, and the contact part can move in the direction of the adjusting piece and is electrically connected with the adjusting piece in a contact mode. According to the battery cover plate, the adjusting piece can move in the direction towards the contact part and the direction away from the contact part so as to adjust the distance between the contact part and the adjusting piece, adjustment of a turnover piece production mold is omitted for different preset pressures, and the effects of shortening the development period and reducing the production cost are achieved.

Description

Technical Field

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

[0002] In order to prevent lithium batteries from exploding, the pressure inside the battery shell needs to be released. The current explosion-proof method is to set a bursting disc on the cover of the lithium battery. When the internal pressure of the lithium battery is too high, the pressure is released through the bursting disc. In addition, when the internal pressure of the lithium battery continues to increase, in order to prevent the lithium battery from exploding directly, a flip plate is set on the cover of the lithium battery. When the internal pressure of the lithium battery exceeds a certain value, the flip plate will flip upward and contact the riveting block, causing a short circuit between the positive and negative electrodes of the lithium battery, and the lithium battery stops working, so that the internal pressure of the lithium battery will not increase.

[0003] In the prior art, different molds are often used to prepare flip sheets of different thicknesses. The flip sheets of different thicknesses correspond to different flip pressures. Therefore, when the flip pressure of the flip sheet needs to be adjusted, the production mold needs to be adjusted. This method requires frequent adjustment of the mold to adjust the thickness of the flip sheet, resulting in a long development cycle and high production costs.

[0004] Therefore, it is urgent to propose a battery cover and a single battery 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 save the adjustment of the flip sheet production mold for different preset pressures, thereby shortening the development cycle and reducing the production cost.

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

[0007] Battery cover, including:

[0008] A cover body, wherein the cover body is provided with a first through hole;

[0009] A flip sheet, the flip sheet includes a contact portion, and the contact portion is conductively and movably connected to the cover plate body;

[0010] A riveting block, which is arranged on a side of the cover body away from the contact portion;

[0011] An adjustment component, the adjustment component comprises an adjustment member, the adjustment member is conductively and movably connected to the riveting block, the orthographic projection of the adjustment member on the cover body and the orthographic projection of the contact portion on the cover body at least partially overlap and are both located in the first through hole;

[0012] The contact portion can move in a direction toward the adjusting member and be in electrical contact with the adjusting member, and the adjusting member can move in a direction toward the contact portion and in a direction away from the contact portion to adjust the distance between the contact portion and the adjusting member.

[0013] Optionally, the riveting block is provided with a threaded hole, the adjusting piece is provided with an external thread, one end of the adjusting piece passes through a side of the riveting block facing the cover body, and the external thread is threadably matched with the threaded hole.

[0014] Optionally, the adjustment assembly also includes a sealing member, a groove is further provided on the riveting block, a threaded hole is opened at the bottom of the groove, a convex ring is provided on the side wall at the other end of the adjustment member, the convex ring is coaxial with the adjustment member, and the sealing member is pressed between the convex ring and the bottom of the groove.

[0015] Optionally, the flip sheet also includes a connecting portion and a deformation portion, the connecting portion is connected to the side of the cover body away from the riveting block, the connecting portion is connected to the contact portion through the deformation portion, and the structural strength of the connecting portion and the structural strength of the contact portion are both greater than the structural strength of the deformation portion.

[0016] Optionally, the deformation portion is disposed around the periphery of the contact portion, and the connection portion is disposed around the periphery of the deformation portion.

[0017] Optionally, the adjusting member is arranged opposite to the contact portion.

[0018] Optionally, the battery cover also includes an insulating member, which is clamped between the riveting block and the cover body, and the insulating member is provided with a second through hole, and the orthographic projection of the adjusting member on the insulating member and the orthographic projection of the contact portion on the insulating member are both located in the second through hole.

[0019] Optionally, the axis of the first through hole, the axis of the second through hole, the axis of the adjusting member and the axis of the contact portion coincide with each other.

[0020] The second object of the utility model is to provide a single battery, which can shorten the development cycle and reduce the production cost.

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

[0022] The single cell battery comprises a battery cell, a battery shell and the above-mentioned battery cover plate, wherein the battery cell is arranged in the battery shell, the cover plate body is arranged to cover the opening of the battery shell, and the flip sheet is located on the side of the cover plate body facing the battery shell.

[0023] Beneficial effects of the utility model:

[0024] The battery cover plate provided by the present utility model is provided with an adjusting assembly. The adjusting member of the adjusting assembly is electrically and movably connected to the riveting block. The orthographic projection of the adjusting member on the cover plate body and the orthographic projection of the contact portion on the cover plate body at least partially overlap and are both located within the first through hole. The adjusting member can move in the directions towards and away from the contact portion to adjust the distance between the contact portion and the adjusting member. When the battery cover plate is covered on the opening of the battery case, when the pressure inside the battery case rises to a preset pressure, the contact portion moves in the direction towards the adjusting member (i.e., the flip piece flips upward) and comes into electrical contact with the adjusting member. When it is necessary to adjust the preset pressure, that is, when it is necessary to adjust the pressure required for the contact portion and the adjusting member to be electrically connected, only the adjusting member needs to be adjusted to adjust the distance between the adjusting member and the contact portion, so that when the pressure inside the battery case rises to different pressure values, the contact portion can be in electrical contact with the adjusting member. It can be seen that this structural design eliminates the need to adjust the production mold of the flip piece, and has the effects of shortening the development cycle and reducing the production cost.

[0025] The single battery provided by the present utility model adopts the above-mentioned battery cover plate. For different preset pressure values, there is no need to adjust the thickness of the flip piece, that is, there is no need to adjust the production mold of the flip piece. Only the distance between the adjusting member and the contact portion of the flip piece needs to be adjusted, which has the effects of shortening the development cycle and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of the battery cover plate provided by an embodiment of the present utility model;

[0027] Figure 2 is a schematic structural diagram of the cover plate body provided by an embodiment of the present utility model;

[0028] Figure 3 is a schematic cross-sectional structural diagram of the battery cover plate provided by an embodiment of the present utility model;

[0029] Figure 4 is Figure 3 a partial enlarged view at A in

[0030] Figure 5 is a schematic structural diagram of the flip piece provided by an embodiment of the present utility model;

[0031] Figure 6 is a schematic structural diagram of the insulating member provided by an embodiment of the present utility model.

[0032] In the figure:

[0033] 100. Cover body; 110. First through hole; 200. Flipping piece; 210. Contact part; 220. Connecting part; 230. Deformation part; 300. Riveting block; 400. Adjusting assembly; 410. Adjusting member; 411. Convex ring; 420. Sealing member; 500. Insulating member; 510. Second through hole; 600. Terminal post. Detailed implementation manners

[0034] The present utility model will be further described in detail below with reference to the accompanying 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. Additionally, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0035] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can 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 situations.

[0036] 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" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal height than the second feature.

[0037] 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 cannot be understood 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.

[0038] This embodiment provides a battery cover, which can save the adjustment of the production mold for the flipping piece for different preset pressures, and has the effects of shortening the development cycle and reducing the production cost.

[0039] Specifically, Figures 1 to 4 As shown, the battery cover includes a cover body 100, a flip sheet 200, a riveting block 300 and an adjusting assembly 400, wherein the cover body 100 is provided with a first through hole 110, the flip sheet 200 includes a contact portion 210, the contact portion 210 is electrically and movably connected to the cover body 100, the riveting block 300 is arranged on a side of the cover body 100 away from the contact portion 210, the adjusting assembly 400 includes an adjusting member 410, the adjusting member 410 is electrically and movably connected to the riveting block 300, and the adjusting member The orthographic projection of 410 on the cover body 100 and the orthographic projection of the contact portion 210 on the cover body 100 at least partially overlap and are both located in the first through hole 110, the adjusting member 410 and the contact portion 210 are spaced apart, the contact portion 210 can move in a direction toward the adjusting member 410 and contact and electrically connect with the adjusting member 410, the adjusting member 410 can move in a direction toward the contact portion 210 and in a direction away from the contact portion 210 to adjust the distance between the contact portion 210 and the adjusting member 410.

[0040] like Figures 1 to 4 As shown, the battery cover further includes a pole 600 , which penetrates the cover body 100 and the riveting block 300 , and the pole 600 is fixedly connected to the riveting block 300 to achieve electrical connection between the riveting block 300 and the pole 600 .

[0041] The battery cover provided in this embodiment is provided with an adjustment component 400, and the adjustment member 410 of the adjustment component 400 is electrically and movably connected to the riveting block 300, and the orthographic projection of the adjustment member 410 on the cover body 100 and the orthographic projection of the contact portion 210 on the cover body 100 at least partially overlap and are both located in the first through hole 110, and the adjustment member 410 can move in a direction toward and away from the contact portion 210 to adjust the spacing between the contact portion 210 and the adjustment member 410, and the battery cover is arranged at the opening of the battery shell, and when the pressure in the battery shell rises to a preset pressure, the contact portion 210 moves in a direction toward the adjustment member 410. The node 410 moves in the direction (that is, the flip sheet 200 flips upward) and contacts and electrically connects with the adjusting member 410. When the preset pressure needs to be adjusted, that is, the pressure required for the electrical connection between the contact portion 210 and the adjusting member 410 needs to be adjusted, it is only necessary to adjust the adjusting member 410 to adjust the distance between the adjusting member 410 and the contact portion 210, so that when the pressure in the battery shell rises to different pressure values, the contact portion 210 can be electrically connected with the adjusting member 410. It can be seen that this structural design eliminates the need for adjusting the production mold of the flip sheet 200, and has the effect of shortening the development cycle and reducing production costs.

[0042] like Figures 1 to 4As shown in the figure, two pole posts 600 are provided on the battery cover plate, one of which is the positive pole post and the other is the negative pole post. Among them, the positive pole post is electrically connected to the cover plate body 100, and the negative pole post is insulated from the cover plate body 100. The positive pole post is conductively and fixedly connected to the positive riveting block, and the negative pole post is conductively and fixedly connected to the negative riveting block. The adjusting member is arranged on the negative riveting block. When the pressure inside the battery case rises to the preset pressure, the high-pressure gas inside the battery case pushes the contact portion 210 to move towards the adjusting member 410 until the contact portion 210 contacts the adjusting member 410, so that the contact portion 210 is conductively connected to the adjusting member 410. The cover plate body 100 is conductively connected to the negative pole post through the contact portion 210, the adjusting member 410 and the negative riveting block, thereby realizing the short circuit between the positive pole post and the negative pole post.

[0043] Of course, in another embodiment, it may also be that both the positive pole post and the negative pole post are insulated from the cover plate body 100, and an adjusting member 410 is conductively and movably connected to both the positive riveting block and the negative riveting block (hereinafter, the adjusting member corresponding to the positive riveting block is called the positive adjusting member, and the adjusting member corresponding to the negative riveting block is called the negative adjusting member), and a turning piece 200 is provided corresponding to both the positive riveting block and the negative riveting block (hereinafter, the turning piece corresponding to the positive riveting block is called the positive turning piece, and the turning piece corresponding to the negative riveting block is called the negative turning piece). When the gas pressure inside the battery case reaches the preset value, both the positive turning piece and the negative turning piece turn over, and the contact portion of the positive turning piece contacts the positive adjusting member, and the contact portion of the negative turning piece contacts the negative adjusting member, thereby realizing the short circuit between the positive pole post and the negative pole post.

[0044] Furthermore, as Figures 1 to 4 shown, the riveting block 300 is provided with a threaded hole, the adjusting member 410 is provided with an external thread, one end of the adjusting member 410 passes out of the side of the riveting block 300 facing the cover plate body 100, and the external thread is in threaded cooperation with the threaded hole. By screwing the adjusting member 410, the distance between the contact portion 210 and the adjusting member 410 can be adjusted. This structural design makes the operation of adjusting the distance between the contact portion 210 and the adjusting portion relatively simple; and after the position of the adjusting member 410 is adjusted, the mutually cooperating threaded hole and external thread can lock the position of the adjusting member 410 on the riveting block 300, that is, lock the distance between the contact portion 210 and the adjusting member 410; in addition, the structure of the mutually cooperating threaded hole and external thread in this embodiment enables the distance between the adjusting member 410 and the contact portion 210 to be adjusted continuously, so that the battery cover plate can be applicable to a variety of preset pressure values.

[0045] In another embodiment, a through hole is provided on the riveting block 300, and a plurality of slots are provided on the hole wall of the through hole. The plurality of slots are spaced apart along the axial direction of the through hole. The adjusting member 410 can be slidably inserted in the through hole, and an elastic protrusion is provided on the side wall of the adjusting member 410. When the elastic protrusion slides to the slot position, the elastic protrusion is stuck in the slot. When it is necessary to continue to adjust the distance between the adjusting member 410 and the contact portion 210, the adjusting member 410 is pulled or pressed with force to deform the elastic protrusion and loosen from the slot until the elastic protrusion moves to the next slot position and is stuck in the slot, thereby realizing the conductive active connection between the adjusting member 410 and the riveting block 300 and locking the position of the adjusting member 410.

[0046] Furthermore, if Figures 1 to 4 As shown, the adjustment component 400 also includes a sealing member 420, and a groove is also provided on the riveting block 300, and a threaded hole is opened at the bottom of the groove. A convex ring 411 is provided on the side wall of the other end of the adjustment member 410, and the convex ring 411 is coaxial with the adjustment member 410. The sealing member 420 is pressed between the convex ring 411 and the bottom of the groove to achieve sealing between the connecting member and the riveting block 300, so as to prevent the high-pressure gas in the battery shell from leaking through the gap between the threaded hole and the adjustment member 410, thereby affecting the contact portion 210 to move toward the adjustment member 410 and contact and electrically connect with the adjustment member 410.

[0047] Optionally, the adjusting member 410 is a connecting member with external threads and conductive properties, such as a screw or a bolt. The flip sheet 200 is made of a conductive material, such as copper or aluminum.

[0048] Alternatively, if Figures 1 to 4 As shown, the adjusting member 410 is arranged opposite to the contact portion 210 , which reduces the probability that the contact portion 210 fails to contact the adjusting member 410 after moving a certain distance toward the adjusting member 410 . This structural design improves the reliability of the contact between the contact portion 210 and the adjusting member 410 .

[0049] Alternatively, if Figures 1 to 5 As shown, the flip sheet 200 also includes a connecting portion 220 and a deforming portion 230. The connecting portion 220 is connected to the side of the cover body 100 away from the rivet block 300. The connecting portion 220 is connected to the contact portion 210 through the deforming portion 230. The thickness of the deforming portion 230 is relatively thin, so that the structural strength of the connecting portion 220 and the structural strength of the contact portion 210 are both greater than the structural strength of the deforming portion 230. When the pressure in the battery shell rises to a preset pressure, the high-pressure gas in the battery shell applies a force to the deforming portion 230, causing the deforming portion 230 to bend and deform and drive the contact portion 210 to move toward the direction of the adjusting member 410 until the contact portion 210 contacts the adjusting member 410.

[0050] Furthermore, if Figures 1 to 5As shown, the deformation part 230 is disposed around the outer periphery of the contact part 210, and the connecting part 220 is disposed around the outer periphery of the deformation part 230. When the deformation part 230 is bent and deformed, it can uniformly apply a force to the contact part 210 along the circumferential direction of the contact part 210, so that the contact part 210 moves towards the adjusting part 410. This structural design improves the reliability of the contact between the contact part 210 and the adjusting part 410.

[0051] Optionally, as Figures 1 to 6 shown, the battery cover plate further includes an insulating part 500. The insulating part 500 is clamped between the riveting block 300 and the cover plate body 100. The insulating part 500 is provided with a second through hole 510. The orthographic projection of the adjusting part 410 on the insulating part 500 and the orthographic projection of the contact part 210 on the insulating part 500 are both located within the second through hole 510. The setting of the insulating part 500 realizes insulation between the riveting block 300 and the cover plate body 100, and the setting of the second through hole 510 enables the insulating part 500 not to interfere with the electrical connection between the contact part 210 and the adjusting part 410.

[0052] Furthermore, as Figures 1 to 6 shown, the axes of the first through hole 110, the second through hole 510, the adjusting part 410, and the contact part 210 coincide, so as to prevent the contact part 210 from contacting the edge of the first through hole 110 and / or the edge of the second through hole 510 during the process of the contact part 210 moving towards the adjusting part 410, so that the contact part 210 cannot contact the adjusting part 410.

[0053] In this embodiment, the cover plate body 100 is made of bright aluminum sheet, and the sealing part 420 can be selected as a relatively common sealing ring in the art.

[0054] This embodiment also provides a single cell battery, which can shorten the development cycle and reduce the production cost.

[0055] Specifically, the single cell battery includes a battery core, a battery case, and the above-mentioned battery cover plate. The battery core is disposed in the battery case, the cover plate body 100 is covered on the opening of the battery case, and the flipping piece 200 is located on the side of the cover plate body 100 facing the battery case. The single cell battery adopts the above-mentioned battery cover plate. For different preset pressure values, there is no need to adjust the thickness of the flipping piece 200, that is, there is no need to adjust the production mold of the flipping piece 200. Only the distance between the adjusting part 410 and the contact part 210 of the flipping piece 200 needs to be adjusted, which has the effect of shortening the development cycle and reducing the production cost.

[0056] 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 the 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: A cover plate body (100), wherein the cover plate body (100) is provided with a first through hole (110); A flip sheet (200), the flip sheet (200) comprising a contact portion (210), the contact portion (210) being electrically and movably connected to the cover plate body (100); a riveting block (300), the riveting block (300) being arranged on a side of the cover plate body (100) facing away from the contact portion (210); An adjustment component (400), the adjustment component (400) comprising an adjustment member (410), the adjustment member (410) being electrically and movably connected to the riveting block (300), the orthographic projection of the adjustment member (410) on the cover body (100) and the orthographic projection of the contact portion (210) on the cover body (100) at least partially overlapping and both being located in the first through hole (110); The contact portion (210) can move in a direction toward the adjusting member (410) and be in contact and electrically connected with the adjusting member (410), and the adjusting member (410) can move in a direction toward the contact portion (210) and in a direction away from the contact portion (210) to adjust the distance between the contact portion (210) and the adjusting member (410).

2. The battery cover according to claim 1, characterized in that: The riveting block (300) is provided with a threaded hole, the adjusting member (410) is provided with an external thread, one end of the adjusting member (410) passes through a side of the riveting block (300) facing the cover plate body (100), and the external thread is threadably matched with the threaded hole.

3. The battery cover according to claim 2, characterized in that: The adjustment component (400) further comprises a sealing member (420); a groove is further provided on the riveting block (300); the threaded hole is opened at the bottom of the groove; a convex ring (411) is provided on the side wall of the other end of the adjustment member (410); the convex ring (411) is coaxial with the adjustment member (410); and the sealing member (420) is pressed between the convex ring (411) and the bottom of the groove.

4. The battery cover according to any one of claims 1 to 3, characterized in that: The flip sheet (200) further comprises a connecting portion (220) and a deforming portion (230); the connecting portion (220) is connected to a side of the cover plate body (100) facing away from the riveting block (300); the connecting portion (220) is connected to the contact portion (210) via the deforming portion (230); and the structural strength of the connecting portion (220) and the structural strength of the contact portion (210) are both greater than the structural strength of the deforming portion (230).

5. The battery cover according to claim 4, characterized in that: The deformation portion (230) is disposed around the outer periphery of the contact portion (210), and the connection portion (220) is disposed around the outer periphery of the deformation portion (230).

6. The battery cover according to any one of claims 1 to 3, characterized in that: The adjusting member (410) is arranged opposite to the contact portion (210).

7. The battery cover according to any one of claims 1 to 3, characterized in that: The battery cover plate further comprises an insulating member (500), wherein the insulating member (500) is sandwiched between the riveting block (300) and the cover plate body (100), and the insulating member (500) is provided with a second through hole (510), and an orthographic projection of the adjusting member (410) on the insulating member (500) and an orthographic projection of the contact portion (210) on the insulating member (500) are both located in the second through hole (510).

8. The battery cover according to claim 7, characterized in that: The axis of the first through hole (110), the axis of the second through hole (510), the axis of the adjusting member (410), and the axis of the contact portion (210) coincide with each other.

9. A single cell, characterized in that: It comprises a battery cell, a battery shell and a battery cover according to any one of claims 1 to 8, wherein the battery cell is arranged in the battery shell, the cover body (100) is covered at the opening of the battery shell, and the flip sheet (200) is located on the side of the cover body (100) facing the battery shell.

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