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, pole columns and a fixing piece, the pole columns are arranged on the two sides of the cover plate body in an insulating mode respectively, and one end of each pole column penetrates through the cover plate body and the fixing piece in a sealed mode and is fixedly connected with the fixing piece; the thickness of the fixing piece is reduced in the direction from the center of the fixing piece to the periphery of the fixing piece, so that the periphery of the fixing piece has an offset space in the thickness direction of the fixing piece. When the pole and the fixing piece are installed, the fixing piece is attached to the cover plate body in an insulating mode, and then the pole and the fixing piece are welded, so that even if the periphery of the fixing piece is warped due to heating, the warped amount is contained in the offset space, the warped height does not exceed the preset height tolerance range of the fixing piece, the problem that the height is out of tolerance does not occur, and the service life of the pole and the fixing piece is prolonged. And thus, the production yield and the use performance of the battery cover plate are improved.

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] With the rapid development of new energy vehicles, power batteries, as the power source of new energy vehicles, are one of the key components of new energy vehicles. The battery cover is the core component of safety and sealing, and its performance stability is crucial to the battery.

[0003] In existing battery covers, the pole and fixing block are first riveted and then reinforced by welding to improve the connection and sealing between the pole and the fixing block. However, after the pole and the fixing block are riveted, the fixing block is flatly attached to the plastic part. During laser welding of the pole and the fixing block, the heat from the fixing block causes the edge of the fixing block to warp upward. This can cause the height of the fixing block to exceed the desired tolerance after assembly, resulting in non-compliance with the desired form and position tolerances such as flatness and parallelism, affecting the production yield and performance of the battery cover.

[0004] Therefore, there is an urgent need for a battery cover and a single battery to solve the above technical problems. Utility Model Content

[0005] One purpose of the present invention is to provide a battery cover plate, which can solve the problem of height deviation caused by warping of the fixing parts after welding, thereby improving the production yield and performance of the battery cover plate.

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

[0007] The battery cover comprises a cover body, a pole and a fixing member, wherein the poles are insulated and arranged on both sides of the cover body, and one end of the pole is sealed and passed through the cover body and the fixing member and is fixedly connected to the fixing member; wherein,

[0008] The thickness of the fixing member is reduced along the direction from the center of the fixing member to the periphery of the fixing member, so that the periphery of the fixing member has an offset space in the thickness direction of the fixing member.

[0009] Optionally, a surface of the fixing member facing the cover body is a mounting surface, and along a direction from the center of the fixing member to the periphery of the fixing member, the mounting surface is gradually arranged away from the cover body to form an inclined surface.

[0010] Optionally, the mounting surface is molded from the center toward the periphery to form the inclined surface.

[0011] Optionally, the thickness of the fixing member near the periphery is A, and the thickness of the fixing member near the center is B, and 0.07 mm ≤ BA ≤ 0.12 mm.

[0012] Optionally, a rivet groove is provided at the center of the fixing member, and a rivet portion is provided at one end of the pole, and the rivet portion is cooperatively connected with the rivet groove.

[0013] Optionally, the battery cover further comprises a lower plastic part, and the lower plastic part is arranged on a side of the cover body away from the fixing part; and / or,

[0014] The battery cover also includes a sealing member. The cover body is provided with a through hole. One end of the pole passes through the through hole and is fixedly connected to the fixing member. The sealing member is provided between the pole and the hole wall of the through hole.

[0015] Optionally, an upper plastic part is further included, and the upper plastic part is arranged between the cover body and the fixing part.

[0016] Optionally, one of the upper plastic part and the fixing part is provided with a slot near the periphery, and the other is provided with a block, and the block is engaged with the slot.

[0017] Optionally, one of the upper plastic part and the cover body is provided with a limiting groove, and the other is provided with a limiting block, and the limiting block is cooperatively connected with the limiting groove.

[0018] Another object of the present invention is to provide a single cell battery, comprising the battery cover plate described in any of the above solutions, which can improve the production yield and performance of the single cell battery.

[0019] Beneficial effects of the utility model:

[0020] The utility model provides a battery cover and a single battery. By reducing the thickness of the periphery of the fixing part, the periphery of the fixing part has an offset space in the direction of its own thickness. When the pole and the fixing part are installed, the fixing part is insulated and fitted to the cover body, and then the two are welded. Even if the fixing part is heated and the periphery is warped, the offset space accommodates the warping amount, so that the warping height does not exceed the preset height tolerance range of the fixing part, thereby avoiding the problem of height deviation, thereby improving the production yield and performance of the battery cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an axonometric view of a battery cover provided in a specific embodiment of the present utility model;

[0022] Figure 2 It is a top view of a battery cover provided by a specific embodiment of the present utility model;

[0023] Figure 3 yes Figure 2 Cross-section at AA;

[0024] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle.

[0025] In the picture:

[0026] 10. Cover plate body;

[0027] 20. Pole; 21. Riveted portion; 22. Connecting portion; 23. Positioning portion;

[0028] 30. Fixing member; 301. Offset space; 31. Mounting surface; 32. Rivet groove;

[0029] 40. Lower plastic part; 50. Sealing part; 60. Upper plastic part. DETAILED DESCRIPTION

[0030] 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.

[0031] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to 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.

[0032] 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.

[0033] In the description of this embodiment, the terms "upper," "lower," "left," "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, 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.

[0034] Refer to the following Figures 1 to 4 The utility model introduces a battery cover and a single battery.

[0035] Please refer to Figures 1 to 4 This embodiment provides a battery cover, which includes a cover body 10, a pole 20 and a fixing member 30. The pole 20 is insulated and arranged on both sides of the cover body 10, and one end of the pole 20 is sealed and passed through the cover body 10 and the fixing member 30 and is fixedly connected to the fixing member 30; wherein, along the direction from the center of the fixing member 30 to the outer periphery of the fixing member 30, the thickness of the fixing member 30 is reduced so that the outer periphery of the fixing member 30 has an offset space 301 in its own thickness direction.

[0036] The battery cover in this embodiment has an offset space 301 on the periphery of the fixing member 30 in its own thickness direction by reducing the thickness of the fixing member 30. When the pole 20 and the fixing member 30 are installed, the fixing member 30 is insulated and attached to the cover body 10, and then the two are welded. Even if the fixing member 30 is heated and causes the periphery to warp, the offset space 301 accommodates the warping amount, so that the warping height does not exceed the preset height tolerance range of the fixing member 30, thereby avoiding the problem of height deviation, thereby improving the production yield and performance of the battery cover.

[0037] Optionally, the connection between the fixing member 30 and the terminal 20 is performed by at least one of riveting and welding. For example, in this embodiment, the fixing member 30 and the terminal 20 are first fixed by riveting and then fixed by welding, thereby ensuring the secure fixation and sealing between the fixing member 30 and the terminal 20. During the riveting, the fixing member 30 can be insulated and attached to the cover body 10, so that the outer periphery of the fixing member 30 is first pressed downward and then tilted back to its original position during welding.

[0038] In some embodiments, the side of the fixing member 30 facing the cover body 10 is the installation surface 31. Along the direction from the center of the fixing member 30 to the periphery of the fixing member 30, the installation surface 31 is gradually set away from the cover body 10 to form an inclined surface to achieve the margin setting of the offset space 301.

[0039] Specifically, the mounting surface 31 is draft-molded from the center toward the periphery to form an inclined surface. This arrangement only requires increasing the draft angle during the molding process of the fixing member 30 , without adding a large manufacturing process, thereby improving the convenience of manufacturing the fixing member 30 .

[0040] Optionally, the thickness of the fixing member 30 near the periphery is A, and the thickness of the fixing member 30 near the center is B, and 0.07mm≤BA≤0.12mm is sufficient to accommodate the margin of the peripheral warping of the fixing member 30.

[0041] Optionally, due to the design requirements of the battery cover, the fixing member 30 in the battery cover may be a cylindrical structure or a square structure.

[0042] In some specific embodiments, the fixing member 30 is a cylindrical structure, and the thickness of the fixing member 30 gradually decreases from the center of the fixing member 30 to the periphery of the fixing member 30, which can solve the problem of height deviation of the periphery of the fixing member 30.

[0043] In some specific embodiments, the fixing member 30 has a square structure. In this case, the outer periphery of the fixing member 30 is tilted at both sides of the length direction of the fixing member 30. Therefore, specifically, the thickness of the fixing member 30 gradually decreases along the length direction of the fixing member 30 from the center of the fixing member 30 to the sides of the fixing member 30, thereby solving the problem of height deviation of the outer periphery of the fixing member 30 and simplifying the complexity of the structure. Of course, in other embodiments, when the fixing member 30 has a square structure, the thickness of the fixing member 30 can also be gradually reduced from the center to the periphery, and this is not specifically limited here.

[0044] Please refer to Figure 4 In some embodiments, a rivet groove 32 is provided at the center of the fixing member 30, and a rivet portion 21 is provided at one end of the pole 20. The rivet portion 21 cooperates with the rivet groove 32 to achieve a riveted connection between the two.

[0045] In some embodiments, a mounting hole is further provided at the center of the fixing member 30, and the pole 20 passes through the mounting hole and is fixedly connected to the cover body 10, thereby increasing the contact area between the fixing member 30 and the pole 20 and improving the stability of the external conductivity of the battery cover.

[0046] In some embodiments, the pole 20 includes a connecting portion 22 and a limiting portion 23. The limiting portion 23 is insulated and disposed on a side of the cover body 10 away from the fixing member 30. The connecting portion 22 passes through the cover body 10 and the fixing member 30 and is fixedly connected to the fixing member 30. The provision of the limiting portion 23 further facilitates the positioning and installation of the pole 20.

[0047] In some embodiments, the battery cover further includes a lower plastic member 40, which is disposed on a side of the cover body 10 away from the fixing member 30 to insulate the cover body 10 from the external mounting structure. Optionally, a stopper 23 is disposed on a side of the lower plastic member 40 away from the cover body 10, thereby insulating the stopper 23 from the cover body 10.

[0048] In some embodiments, the battery cover also includes a seal 50. The cover body 10 is provided with a through hole. One end of the pole 20 passes through the through hole and is fixedly connected to the fixing member 30. The seal 50 is arranged between the pole 20 and the hole wall of the through hole, thereby realizing the sealing setting of the battery cover and improving the sealing of the single battery equipped with the battery cover.

[0049] In some embodiments, the battery cover further includes an upper plastic part 60 , which is disposed between the cover body 10 and the fixing part 30 , thereby achieving an insulation setting between the fixing part 30 and the cover body 10 and also achieving a limiting effect on the fixing part 30 .

[0050] In some embodiments, one of the upper plastic part 60 and the fixing part 30 near the periphery is provided with a card slot, and the other is provided with a card block, which is connected to the card slot in cooperation. This arrangement increases the pulling force of the upper plastic part 60 on the periphery of the fixing part 30, thereby reducing the warping height of the periphery of the fixing part 30, further solving the height deviation problem caused by the warping edge of the fixing part 30 after welding, and improving the production yield and performance of the battery cover.

[0051] Furthermore, one of the upper plastic part 60 and the cover body 10 is provided with a limit groove, and the other is provided with a limit block, and the limit block is connected in cooperation with the limit groove, further strengthening the connection between the upper plastic part 60 and the cover body 10, thereby increasing the pulling force of the cover body 10 on the upper plastic part 60, so that the cover body 10 also has a certain pulling force on the peripheral position of the fixing part 30, thereby further reducing the warping height of the periphery of the fixing part 30, further solving the height deviation problem caused by the warping edge of the fixing part 30 after welding, and improving the production yield and performance of the battery cover.

[0052] This embodiment also provides a single cell battery comprising the battery cover described in any of the above-mentioned solutions. By using the battery cover, the yield rate of the single cell battery is improved, and the fixing member 30 and the terminal 20 of the single cell battery's external electrical connection are prevented from being partially lifted, thus preventing interference with the installation of other structures and improving the accuracy of the single cell battery.

[0053] 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. Battery cover, characterized in that: The invention comprises a cover plate body (10), a pole (20) and a fixing member (30), wherein the pole (20) is insulated and arranged on both sides of the cover plate body (10), and one end of the pole (20) is sealed and passed through the cover plate body (10) and the fixing member (30) and is fixedly connected to the fixing member (30); wherein, The thickness of the fixing member (30) is reduced along the direction from the center of the fixing member (30) to the periphery of the fixing member (30), so that the periphery of the fixing member (30) has an offset space (301) in its own thickness direction.

2. The battery cover according to claim 1, characterized in that: A side of the fixing member (30) facing the cover plate body (10) is a mounting surface (31), and along a direction from the center of the fixing member (30) to the periphery of the fixing member (30), the mounting surface (31) is gradually arranged away from the cover plate body (10) to form an inclined surface.

3. The battery cover according to claim 2, characterized in that: The mounting surface (31) is molded from the center toward the periphery to form the inclined surface.

4. The battery cover according to claim 1, characterized in that: The thickness of the fixing member (30) near the periphery is A, and the thickness of the fixing member (30) near the center is B, 0.07mm≤BA≤0.12mm.

5. The battery cover according to claim 1, characterized in that: A rivet groove (32) is provided at the center of the fixing member (30), and a rivet portion (21) is provided at one end of the pole (20), wherein the rivet portion (21) is cooperatively connected with the rivet groove (32).

6. The battery cover according to claim 1, characterized in that: The battery cover further comprises a lower plastic part (40), wherein the lower plastic part (40) is arranged on a side of the cover body (10) away from the fixing part (30); and / or, The battery cover also includes a sealing member (50), the cover body (10) is provided with a through hole, one end of the pole (20) passes through the through hole and is fixedly connected to the fixing member (30), and the sealing member (50) is arranged between the pole (20) and the hole wall of the through hole.

7. The battery cover according to any one of claims 1 to 6, characterized in that: It also includes an upper plastic part (60), which is arranged between the cover body (10) and the fixing part (30).

8. The battery cover according to claim 7, characterized in that: One of the upper plastic part (60) and the fixing part (30) is provided with a card slot at a position close to the outer periphery, and the other is provided with a card block, and the card block is matched and connected with the card slot.

9. The battery cover according to claim 8, characterized in that: One of the upper plastic part (60) and the cover plate body (10) is provided with a limiting groove, and the other is provided with a limiting block, and the limiting block is matched and connected with the limiting groove.

10. A single cell battery, characterized in that: The invention comprises the battery cover according to any one of claims 1 to 9.

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