Top cover assembly, single battery and electric device

Abstract

The utility model belongs to the technical field of batteries, and discloses a top cover assembly, a single battery and an electric device. The top cover assembly comprises a top cover piece, a pole assembly and an upper plastic part, wherein a pole mounting hole is formed in the top cover piece; the pole assembly comprises a connecting pole and a switching pole which are coaxially arranged, the connecting pole is fixedly arranged at the top end of the connecting pole, and the connecting pole penetrates through the pole mounting hole; the upper plastic part is clamped between the connecting pole and the top wall of the top cover plate; wherein the upper plastic part is provided with a containing groove, the lower half part of the connecting pole is contained in the containing groove, and the cross sectional area of the containing groove and the cross sectional area of the lower half part are gradually reduced from top to bottom in the vertical direction. According to the top cover assembly, the positioning accuracy between the upper plastic part and the connecting pole can be improved, and the connecting pole and the upper plastic part can be conveniently mounted, so that the mounting efficiency and the production quality of the top cover assembly are improved.

Description

Technical Field

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

[0002] Existing lithium-ion batteries typically consist of a cell assembly, a casing, and a top cover. The cell assembly is placed within the casing, while the top cover covers the cell assembly and, together with the casing, forms a complete, enclosed secondary battery housing. When assembling a secondary battery, the top cover assembly is typically assembled first, then combined with the other components before being placed into the casing. The top cover assembly is typically assembled using processes such as riveting, injection molding, injection molding and welding, or welding.

[0003] In the related art, the pole of the secondary battery top cover structure is usually a sealed structure, and the internal pole ear of the battery may be connected to the adapter pole first, and the adapter pole is then connected to the aluminum block on the top cover to complete the internal and external connection of the secondary battery. Finally, the top cover is welded to the shell to complete the secondary battery packaging. In order to achieve insulation between the aluminum block and the top cover, the bottom of the aluminum block is usually wrapped with upper plastic. For easy installation, the receiving groove of the upper plastic is usually larger than the size of the aluminum block. When the aluminum block is installed, it is easy for the aluminum block to become skewed in the upper plastic, and secondary positioning is required, resulting in low assembly efficiency of the top cover component and prone to defective products, resulting in a decline in production quality.

[0004] Therefore, there is an urgent need to provide a new top cover assembly, a single battery and an electrical device to solve the above technical problems in the prior art. Utility Model Content

[0005] One purpose of the present invention is to provide a top cover assembly that can improve the positioning accuracy between the upper plastic part and the connecting pole, facilitate the installation between the connecting pole and the upper plastic part, thereby improving the installation efficiency and production quality of the top cover assembly.

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

[0007] The top cover assembly includes a top cover sheet, a pole assembly and an upper plastic part. The top cover sheet is provided with a pole mounting hole. The pole assembly includes a coaxially arranged connecting pole and a transfer pole. The connecting pole is fixed to the top end of the connecting pole and is passed through the pole mounting hole. The upper plastic part is clamped between the connecting pole and the top wall of the top cover sheet. The upper plastic part is provided with a receiving groove. The lower half of the connecting pole is received in the receiving groove. The cross-sectional area of ​​the receiving groove and the cross-sectional area of ​​the lower half both gradually decrease from top to bottom along the vertical direction.

[0008] Optionally, the accommodating groove is transitionally connected to the lower half, so that a gap is formed between the circumferential inner wall of the accommodating groove and the circumferential outer wall of the lower half.

[0009] Optionally, the cross-sectional area of ​​the gap portion gradually decreases from top to bottom along the vertical direction.

[0010] Optionally, the bottom end of the lower half is provided with a chamfer.

[0011] Optionally, the circumferential inner wall forming the above-mentioned accommodating groove and the circumferential outer wall forming the above-mentioned lower half are both inclined planes.

[0012] Optionally, a positioning protrusion is convexly provided on the bottom wall of the upper plastic part, and a positioning groove is concavely provided on the top wall of the top cover piece, and the positioning protrusion is inserted into the positioning groove.

[0013] Optionally, the positioning groove is provided at a top port of the pole mounting hole, so that the positioning groove is communicated with the pole mounting hole.

[0014] Optionally, the depth of the positioning groove is not less than the height of the positioning protrusion.

[0015] Another object of the present invention is to provide a single cell battery, which includes the top cover assembly described in any of the above solutions.

[0016] Another object of the present invention is to provide an electrical device comprising the single battery as described in the above solution.

[0017] Beneficial effects:

[0018] The cover plate assembly in the present invention is used to install the pole assembly by opening a pole mounting hole on the top cover sheet. Specifically, the adapter pole of the pole assembly is inserted into the pole mounting hole, and a coaxially arranged connecting pole is fixed on the top of the adapter pole. An upper plastic part is sandwiched between the connecting pole and the top cover sheet, thereby achieving insulation between the connecting pole and the top cover sheet. When the connecting pole is connected to the upper plastic part, the lower half of the connecting pole is inserted into the accommodating groove of the upper plastic part. The cross-sectional areas of the lower half and the accommodating groove gradually decrease from top to bottom in the vertical direction, so that the accommodating groove guides the installation of the lower half, ensuring that the connecting pole is located in the center of the accommodating groove when installed, thereby improving the positioning accuracy, eliminating the need for secondary positioning, and improving production efficiency and higher production quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an axonometric view of the top cover assembly provided by a specific embodiment of the present utility model;

[0020] Figure 2It is a cross-sectional view of a top cover assembly provided in a specific embodiment of the present utility model.

[0021] In the picture:

[0022] 100, top cover; 110, pole mounting hole; 111, positioning groove;

[0023] 200, pole assembly; 210, connecting pole; 211, lower half; 212, chamfer; 220, transfer pole; 230, gap portion;

[0024] 300, upper plastic part; 310, receiving groove; 320, positioning protrusion;

[0025] 400. Remove plastic parts. DETAILED DESCRIPTION

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] Please refer to Figure 1 and Figure 2 The top cover assembly includes a top cover sheet 100, a pole assembly 200 and an upper plastic part 300. The top cover sheet 100 is provided with a pole mounting hole 110; the pole assembly 200 includes a coaxially arranged connecting pole 210 and a transfer pole 220, the connecting pole 210 is fixedly arranged at the top end of the connecting pole 210, and the connecting pole 210 is passed through the pole mounting hole 110; the upper plastic part 300 is sandwiched between the connecting pole 210 and the top wall of the top cover sheet 100; wherein the upper plastic part 300 is provided with a receiving groove 310, and the lower half 211 of the connecting pole 210 is accommodated in the receiving groove 310, and the cross-sectional area of ​​the receiving groove 310 and the cross-sectional area of ​​the lower half 211 both gradually decrease from top to bottom along the vertical direction.

[0031] In this embodiment, the cover assembly is used to install the pole assembly 200 by opening a pole mounting hole 110 on the top cover sheet 100. Specifically, the adapter pole 220 of the pole assembly 200 is inserted into the pole mounting hole 110, and a coaxially arranged connecting pole 210 is fixed on the top of the adapter pole 220. An upper plastic part 300 is sandwiched between the connecting pole 210 and the top cover sheet 100 to achieve insulation between the connecting pole 210 and the top cover sheet 100. When connecting between 300, the lower half 211 of the connecting pole 210 is inserted into the receiving groove 310 of the upper plastic part 300, and the cross-sectional areas of the lower half 211 and the receiving groove 310 gradually decrease from top to bottom in the vertical direction, so that the receiving groove 310 guides the installation of the lower half 211, ensuring that the connecting pole 210 is located at the center of the receiving groove 310 during installation, thereby improving the positioning accuracy, eliminating the need for secondary positioning, improving production efficiency, and achieving higher production quality.

[0032] The lower half 211 described in this embodiment refers to the portion of the connecting pole 210 whose cross-section gradually decreases from top to bottom. In some embodiments, the cross-section of the entire connecting pole 210 gradually decreases from top to bottom; or the cross-sectional area of ​​the upper half of the connecting pole 210 is not limited, and can gradually decrease, remain unchanged, or gradually increase, while the cross-sectional area of ​​the lower half 211 gradually becomes smaller, and can be formed as the lower half 211 in this embodiment, which will not be repeated here.

[0033] The function of the adapter pole 220 is to lead the current inside the single battery into the connecting pole 210, and the connecting pole 210 is connected to the external device for power supply, which will not be described in detail here.

[0034] A lower plastic component 400 is further sandwiched between the bottom of the adapter pole 220 and the bottom wall of the top cover 100 to achieve insulation between the adapter pole 220 and the top cover 100 .

[0035] Optionally, the receiving groove 310 is transitionally connected to the lower half 211, so that a gap 230 is formed between the circumferential inner wall of the receiving groove 310 and the circumferential outer wall of the lower half 211. The provision of the gap 230 ensures that the lower half 211 can be smoothly inserted into the receiving groove 310, avoiding any jamming during installation and improving production efficiency.

[0036] like Figure 2 As shown, in this embodiment, the cross-sectional area of ​​the gap portion 230 gradually decreases from top to bottom along the vertical direction. Furthermore, the cross-sectional area of ​​the lowest end of the gap portion 230 is zero, that is, the lowest end of the lower half 211 abuts the circumferential inner wall of the receiving groove 310. This arrangement enables the receiving groove 310 to better limit and fix the connecting pole 210, thereby improving the positioning effect.

[0037] In this embodiment, the bottom end of the lower half 211 is provided with a chamfer 212. The chamfer 212 facilitates the insertion of the connecting pole 210 into the receiving groove 310 and prevents damage to the upper plastic part 300 during the insertion of the connecting pole 210, thereby improving the production yield.

[0038] Please continue to refer to Figure 1 and Figure 2 The circumferential inner wall forming the accommodating groove 310 and the circumferential outer wall forming the lower half 211 are both inclined planes. In this embodiment, the cross-sections of the accommodating groove 310 and the connecting pole 210 are both square, so that the outer wall of the connecting pole 210 and the inner wall of the accommodating groove 310 form four inclined planes. This arrangement can reduce the complexity of the connecting pole 210's appearance, reduce the difficulty of the production process, and thus improve production efficiency.

[0039] Optionally, a positioning protrusion 320 is provided on the bottom wall of the upper plastic part 300, and a positioning groove 111 is provided on the top wall of the top cover 100. The positioning protrusion 320 is inserted into the positioning groove 111. That is, the positioning protrusion 320 and the positioning groove 111 cooperate with each other to achieve the positioning of the top cover 100 relative to the upper plastic part 300, thereby improving the accuracy of the position of the connecting terminal 210 and further enhancing production quality.

[0040] Furthermore, the positioning groove 111 is provided at the top end of the pole mounting hole 110, so that the positioning groove 111 is communicated with the pole mounting hole 110. By providing the positioning groove 111 at the top end of the pole mounting hole 110, the positioning groove 111 can be formed simultaneously with the formation of the pole mounting hole 110, thereby reducing the complexity of the production process, improving production efficiency, and reducing production costs.

[0041] It should be noted that the depth of the positioning groove 111 is not less than the height of the positioning protrusion 320. The depth of the positioning groove 111 is not greater than the height of the positioning protrusion 320, and more specifically, the depth of the positioning groove 111 is greater than the height of the positioning protrusion 320. This allows the positioning groove 111 to position the positioning protrusion 320 of the upper plastic part 300 while preventing the upper plastic part 300 from being lifted, thereby ensuring the accuracy of the position of the upper plastic part 300 on the top cover sheet 100 and further improving production quality.

[0042] This embodiment also provides a single cell battery, comprising the top cover 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 has the beneficial effects of the top cover assembly described in any of the above-mentioned solutions, which are not further described here.

[0043] Specifically, the single cell battery uses the above-mentioned top cover assembly, which can enable the accommodating groove 310 to guide the installation of the lower half 211 of the connecting pole 210, ensuring that the connecting pole 210 is located at the center of the accommodating groove 310 during installation, thereby improving the positioning accuracy and eliminating the need for secondary positioning. This can improve the production efficiency of the single cell battery and increase the yield rate, resulting in higher production quality of the single cell battery.

[0044] 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.

[0045] 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. Top cover assembly, characterized in that, include: A top cover plate (100), wherein the top cover plate (100) is provided with a pole mounting hole (110); A pole assembly (200), the pole assembly (200) comprising a coaxially arranged connecting pole (210) and a transfer pole (220), the connecting pole (210) being fixed to the top end of the connecting pole (210), and the connecting pole (210) being passed through the pole mounting hole (110); An upper plastic part (300) is sandwiched between the connecting pole (210) and the top wall of the top cover (100); wherein the upper plastic part (300) is provided with a receiving groove (310), the lower half (211) of the connecting pole (210) is received in the receiving groove (310), and the cross-sectional area of ​​the receiving groove (310) and the cross-sectional area of ​​the lower half (211) are gradually reduced from top to bottom along the vertical direction.

2. The top cover assembly according to claim 1, wherein: The accommodating groove (310) is transitionally connected to the lower half (211), so that a gap portion (230) is formed between the circumferential inner wall of the accommodating groove (310) and the circumferential outer wall of the lower half (211).

3. The top cover assembly according to claim 2, wherein: The cross-sectional area of ​​the gap portion (230) gradually decreases from top to bottom along the vertical direction.

4. The top cover assembly according to claim 3, wherein: The bottom end of the lower half (211) is provided with a chamfer (212).

5. The top cover assembly according to claim 3, wherein: The circumferential inner wall forming the accommodating groove (310) and the circumferential outer wall forming the lower half (211) are both inclined planes.

6. The top cover assembly according to claim 1, wherein: The bottom wall of the upper plastic part (300) is provided with a positioning protrusion (320), and the top wall of the top cover sheet (100) is provided with a positioning groove (111), and the positioning protrusion (320) is inserted into the positioning groove (111).

7. The top cover assembly according to claim 6, wherein: The positioning groove (111) is arranged at the top end of the pole mounting hole (110), so that the positioning groove (111) is connected to the pole mounting hole (110).

8. The top cover assembly according to claim 7, wherein: The depth of the positioning groove (111) is not less than the height of the positioning protrusion (320).

9. A single cell battery, characterized in that: The invention comprises a top cover 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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