Cover plate assembly, single battery and electric device

Abstract

The utility model belongs to the technical field of batteries, and discloses a cover plate assembly, a single battery and an electric device. The cover plate assembly comprises a cover plate body and a lower plastic part, wherein a rotation stopping groove is formed in the bottom wall of the cover plate body; the lower plastic part abuts against the bottom wall of the cover plate body, a rotation stopping column is arranged on the top wall of the lower plastic part, and the rotation stopping column is inserted into the rotation stopping groove. The size of the lower plastic part in the first direction is larger than the size of the lower plastic part in the second direction, the size of the rotation stopping groove in the first direction is larger than the size of the rotation stopping column in the first direction, and the second direction is perpendicular to the first direction. According to the cover plate assembly, the installation convenience between the lower plastic part and the cover plate body can be improved, the structural reliability of the cover plate body is improved, and the production quality and the production efficiency are improved.

Description

Technical Field

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

[0002] The battery cover is a key component that seals the shell with the battery cell, outputs the internal energy, and ensures the safety of the battery cell. It has strict requirements on the sealing of the cover assembly, the pressure relief pressure of the safety valve, the electrical performance, the size and appearance. The battery cover assembly is composed of a plain aluminum sheet, a pole, a lower plastic and a sealing ring. The lower plastic in the existing technology is in sheet form, which is easy to deform and affects the dimensional accuracy. When the battery cover is installed, the deformation of the lower plastic will cause positioning error, resulting in the inability of the anti-rotation column set on the lower plastic to be installed in the anti-rotation groove at the bottom of the plain aluminum sheet. Not only does it cause the battery cover to warp and deform, affecting the production quality of the battery cover, but it also causes the anti-rotation column on the lower plastic to be unable to perform its anti-rotation function, resulting in installation misalignment between the lower plastic and the plain aluminum sheet, affecting the structural reliability of the battery cover.

[0003] Therefore, there is an urgent need to provide a new type of cover plate assembly, single battery and power-consuming device to solve the above-mentioned technical problems in the prior art. Utility Model Content

[0004] The purpose of the utility model is to provide a cover assembly, which can improve the installation convenience between the lower plastic part and the cover body, improve the structural reliability of the cover body, and improve production quality and production efficiency.

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

[0006] The cover assembly includes a cover body and a lower plastic part, the bottom wall of the cover body is provided with a stop groove; the lower plastic part abuts against the bottom wall of the cover body, the top wall of the lower plastic part is provided with a stop column, and the stop column is inserted into the stop groove; wherein, the size of the lower plastic part along the first direction is greater than the size of the lower plastic part along the second direction, the size of the stop groove along the first direction is greater than the size of the stop column along the first direction, and the second direction is perpendicular to the first direction.

[0007] Optionally, a plurality of the anti-rotation grooves and the anti-rotation posts are provided in a one-to-one correspondence.

[0008] Optionally, the cover plate body is provided with an explosion-proof valve mounting hole, and the plurality of anti-rotation grooves are distributed at intervals on the periphery of the explosion-proof valve mounting hole.

[0009] Optionally, the plurality of anti-rotation grooves are divided into two groups and are axially symmetrical about the central axis of the explosion-proof valve mounting hole along the first direction.

[0010] Optionally, in each group of the anti-rotation grooves, the distances between any two of the anti-rotation grooves and the central axis along the first direction are not equal.

[0011] Optionally, there are four anti-rotation grooves, and the four anti-rotation grooves are distributed in a trapezoidal shape.

[0012] Optionally, the cover body is provided with a liquid injection hole, and the lower plastic part is provided with a liquid injection portion corresponding to the liquid injection hole, and the liquid injection portion is used to connect the liquid injection hole and the interior of the battery shell.

[0013] Optionally, the liquid injection portion is arranged on the bottom wall of the lower plastic part and is arranged toward the interior of the battery shell. The inner diameter of the liquid injection portion gradually decreases along the direction from the lower plastic part toward the interior of the battery shell. A connecting hole is provided on the circumferential side wall of the liquid injection portion. The connecting hole is used to connect the liquid injection hole and the interior of the battery shell.

[0014] Another object of the present invention is to provide a single cell battery, which includes the cover plate assembly described in any of the above solutions.

[0015] Another object of the present invention is to provide an electrical device comprising the single battery as described in the above solution.

[0016] Beneficial effects:

[0017] The cover assembly of the present invention is composed of a cover body and a lower plastic part, and the size of the lower plastic part along the first direction is larger than its size along the second direction, which alleviates the problem that the size of the lower plastic part along the first direction varies greatly due to processing errors or environmental changes such as temperature, resulting in a large change in the position of the anti-rotation column on the lower plastic part along the first direction. In addition, because the size of the anti-rotation groove provided at the bottom of the cover body along the first direction is larger than its size along the second direction, the anti-rotation groove can fully accommodate the anti-rotation column. Even if the anti-rotation column changes its position, the anti-rotation column can be installed in the anti-rotation groove, ensuring the accurate matching installation of the cover body and the lower plastic part. The cover assembly can improve the installation convenience between the lower plastic part and the cover body, improve the structural reliability of the cover body, and improve production quality and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an exploded view of the cover plate assembly provided in a specific embodiment of the present utility model;

[0019] Figure 2 This is an exploded view of the cover assembly provided by the specific embodiment of the utility model from another perspective;

[0020] Figure 3 yes Figure 2A partial enlarged view of point A in the middle.

[0021] In the picture:

[0022] 100, cover plate body; 110, anti-rotation groove; 120, explosion-proof valve mounting hole; 121, explosion-proof valve body; 122, center axis; 130, injection hole; 140, pole mounting hole; 141, pole body;

[0023] 200, lower plastic part; 210, anti-rotation column; 220, liquid injection part; 221, communication hole. DETAILED DESCRIPTION

[0024] 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.

[0025] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0026] 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.

[0027] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0028] The first direction described in this embodiment is Figure 2 and Figure 3 The X direction shown in FIG is the length direction of the cover body 100, and the second direction is Figure 2 and Figure 3 The Y direction shown in , ie, the width direction of the cover body 100 ; the first direction and the second direction are perpendicular to each other.

[0029] like Figures 1 to 3 As shown, the cover assembly includes a cover body 100 and a lower plastic part 200, and the bottom wall of the cover body 100 is provided with a stop groove 110; the lower plastic part 200 abuts against the bottom wall of the cover body 100, and the top wall of the lower plastic part 200 is provided with a stop column 210, and the stop column 210 is inserted into the stop groove 110; wherein, the size of the lower plastic part 200 along the first direction is greater than the size of the lower plastic part 200 along the second direction, the size of the stop groove 110 along the first direction is greater than the size of the stop column 210 along the first direction, and the second direction is perpendicular to the first direction.

[0030] The cover assembly in this embodiment comprises a cover body 100 and a lower plastic part 200. The dimension of the lower plastic part 200 along a first direction is greater than its dimension along a second direction. Due to processing errors or environmental changes such as temperature, the dimension of the lower plastic part 200 along the first direction varies significantly, causing the position of the stop post 210 on the lower plastic part 200 to vary significantly along the first direction. However, the stop groove 110 defined at the bottom of the cover body 100 has a dimension along the first direction greater than its dimension along the second direction, allowing the stop groove 110 to fully accommodate the stop post 210. Even if the position of the stop post 210 varies, the stop post 210 can still be installed in the stop groove 110, ensuring accurate installation of the cover body 100 and the lower plastic part 200. This cover assembly can improve the ease of installation between the lower plastic part 200 and the cover body 100, enhance the structural reliability of the cover body 100, and improve production quality and efficiency.

[0031] Furthermore, a plurality of the anti-rotation grooves 110 and the anti-rotation posts 210 are provided in a one-to-one correspondence. The provision of multiple anti-rotation posts 210 and anti-rotation grooves 110 can limit and fix the cover body 100 and the lower plastic part 200 in different rotation directions, thereby improving the anti-rotation effect and the positioning and limiting effect.

[0032] In this embodiment, the cover plate body 100 defines an explosion-proof valve mounting hole 120, with multiple anti-rotation grooves 110 spaced apart around the periphery of the hole 120. The presence of anti-rotation grooves 110 around the hole 120 fully utilizes the space on the cover plate body 100, avoiding obstruction of other components and structures, and improving industrial practicality. The hole 120 is used to mount an explosion-proof valve body 121, which is used to provide explosion-proof pressure relief for the individual cells and will not be further described here.

[0033] Optionally, the plurality of anti-rotation grooves 110 are divided into two groups and are arranged symmetrically along the first direction with respect to the central axis 122 of the explosion-proof valve mounting hole 120. Since the plurality of anti-rotation grooves 110 are divided into two groups and are arranged symmetrically with respect to the central axis 122, they can prevent rotation in both clockwise and counterclockwise directions, thereby improving the anti-rotation effect.

[0034] Please continue to refer to Figure 2 and Figure 3 In each set of the aforementioned anti-rotation grooves 110, the distances between any two anti-rotation grooves 110 and the aforementioned central axis 122 along the aforementioned first direction are not equal. Through the above arrangement, the distances between any two anti-rotation grooves 110 and the central axis 122 in each set of the aforementioned anti-rotation grooves 110 are different, so that the anti-rotation post 210 and the corresponding anti-rotation groove 110 have different rotation radii and rotation centers relative to other anti-rotation posts 210 and anti-rotation grooves 110, thereby improving the anti-rotation effect of the lower plastic part 200 and the installation reliability between the lower plastic part 200 and the cover body 100.

[0035] Specifically, in this embodiment, there are four anti-rotation grooves 110, and the four anti-rotation grooves 110 are arranged in a trapezoidal distribution. It should be noted that the anti-rotation grooves 110 can also be set to an even number such as 6, 8, 10, etc., as long as they are axially symmetrically distributed about the central axis. There is no specific limitation here.

[0036] Optionally, the cover plate body 100 is provided with a liquid injection hole 130, and the lower plastic member 200 is provided with a liquid injection portion 220 corresponding to the liquid injection hole 130. The liquid injection portion 220 is used to connect the liquid injection hole 130 with the interior of the battery housing. The provision of the liquid injection hole 130 and the liquid injection portion 220 allows for electrolyte to be injected into the battery housing after the cover plate assembly is installed therein, which is convenient and has high injection efficiency.

[0037] Furthermore, the injection portion 220 is disposed on the bottom wall of the lower plastic part 200 and faces the interior of the battery case. The inner diameter of the injection portion 220 gradually decreases from the lower plastic part 200 toward the interior of the battery case. A connecting hole 221 is disposed on the circumferential sidewall of the injection portion 220. The connecting hole 221 is used to connect the injection hole 130 with the interior of the battery case. In other words, the injection portion 220 is funnel-shaped, which can improve the efficiency of electrolyte injection. Furthermore, the connecting hole 221 connecting the interior of the battery case with the injection hole 130 is disposed on the circumferential sidewall of the injection portion 220. This allows the injection portion 220 to mitigate the impact force during injection and reduce the generation of bubbles, thereby ensuring sufficient electrolyte infusion within the battery case and improving the production quality of the molded single cells.

[0038] The cover body 100 is also provided with a pole mounting hole 140, which is used to penetrate a pole body 141. The pole body 141 is used to lead out the power of the single battery and conduct it to the electrical equipment for power supply. At the same time, the pole body 141 is formed by riveting, and can also fix the lower plastic part 200 to the bottom wall of the cover body 100, thereby fixing the cover assembly.

[0039] This embodiment also provides a single cell battery, comprising the cover plate assembly described in any of the above-mentioned solutions. The single cell battery may specifically be a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid (or lead-storage) battery, a lithium-ion battery, a polymer lithium-ion battery, or the like. The single cell battery may also be a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc., which are not further described here. This single cell battery exhibits the beneficial effects of the cover plate assembly described in any of the above-mentioned solutions, which are not further described here.

[0040] This embodiment further provides an electrical device comprising the single battery described in the above embodiment. The electrical device can be an electric bicycle, an electric vehicle, a hybrid vehicle, a ship, an energy storage device, etc., as long as it uses electricity as an energy source, and no further details are given here.

[0041] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Cover plate assembly, characterized in that, include: A cover plate body (100), wherein a rotation-stop groove (110) is provided on the bottom wall of the cover plate body (100); A lower plastic part (200), the lower plastic part (200) abuts against the bottom wall of the cover body (100), the top wall of the lower plastic part (200) is provided with a stop post (210), and the stop post (210) is inserted into the stop groove (110); wherein, The size of the lower plastic part (200) along the first direction is greater than the size of the lower plastic part (200) along the second direction, the size of the anti-rotation groove (110) along the first direction is greater than the size of the anti-rotation column (210) along the first direction, and the second direction is perpendicular to the first direction.

2. The cover plate assembly according to claim 1, wherein: The anti-rotation grooves (110) and the anti-rotation columns (210) are each provided in a plurality in a one-to-one correspondence.

3. The cover plate assembly according to claim 2, wherein: The cover plate body (100) is provided with an explosion-proof valve installation hole (120), and a plurality of the anti-rotation grooves (110) are distributed at intervals on the periphery of the explosion-proof valve installation hole (120).

4. The cover plate assembly according to claim 3, wherein: The plurality of anti-rotation grooves (110) are divided into two groups and are axially symmetrical about the central axis (122) of the explosion-proof valve mounting hole (120) along the first direction.

5. The cover plate assembly according to claim 4, wherein: In each group of the anti-rotation grooves (110), the distances between any two of the anti-rotation grooves (110) and the central axis (122) along the first direction are not equal.

6. The cover plate assembly according to claim 5, wherein: Four anti-rotation grooves (110) are provided, and the four anti-rotation grooves (110) are distributed in a trapezoidal shape.

7. The cover plate assembly according to claim 1, wherein: The cover plate body (100) is provided with a liquid injection hole (130), and the lower plastic part (200) is provided with a liquid injection portion (220) corresponding to the liquid injection hole (130), and the liquid injection portion (220) is used to connect the liquid injection hole (130) and the interior of the battery shell.

8. The cover plate assembly according to claim 7, wherein: The liquid injection portion (220) is arranged on the bottom wall of the lower plastic part (200) and is arranged toward the interior of the battery shell. The inner diameter of the liquid injection portion (220) gradually decreases along the direction from the lower plastic part (200) toward the interior of the battery shell. A connecting hole (221) is provided on the circumferential side wall of the liquid injection portion (220). The connecting hole (221) is used to connect the liquid injection hole (130) and the interior of the battery shell.

9. A single cell battery, characterized in that: The invention comprises the cover plate assembly according to any one of claims 1 to 8.

10. An electrical device, characterized in that: The invention comprises the single cell battery as claimed in claim 9.

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