CN223347874U

CN223347874U - Top cover assembly, single battery and electrical device

Info

Publication number: CN223347874U
Application number: CN202422498755.0U
Authority: CN
Inventors: 励建炬; 李煌凯; 段建国
Original assignee: Shenzhen Kedali Industry Co ltd
Current assignee: Shenzhen Kedali Industry Co ltd
Priority date: 2024-10-16
Filing date: 2024-10-16
Publication date: 2025-09-16
Anticipated expiration: 2034-10-16

Abstract

The utility model belongs to the field of battery technology and discloses a top cover assembly, a single cell and an electrical device. The top cover assembly includes a top cover plate, a pole assembly and an upper plastic part. The top cover plate 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 plate. 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. The top cover assembly 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.

Description

Top cap subassembly, battery cell and power consumption device

Technical Field

The utility model relates to the technical field of batteries, in particular to a top cover assembly, a single battery and an electric device.

Background

Existing lithium ion batteries generally include a battery cell assembly disposed within a housing, and a top cover overlying the battery cell assembly and cooperating with the housing to form a complete, enclosed enclosure for the secondary battery. In assembling the secondary battery, it is common to assemble the top cap assembly first, then assemble the top cap assembly with other assemblies, and then put the top cap assembly into the case together. In assembling the roof assembly structure, riveting, injection molding and welding or welding processes are generally adopted.

In the related art, the pole of secondary battery top cap structure is usually seal structure, the inside utmost point ear of battery or be connected with the switching pole earlier, the switching pole is connected with the aluminium piece on the top cap again, in order to accomplish the internal and external connection of secondary battery, last top cap and casing welding, finally accomplish the secondary battery encapsulation, wherein in order to realize the insulation between aluminium piece and the top cap, the plastic parcel aluminium piece's bottom is usually used, for convenient installation, go up the size that the holding tank of plastic can be greater than the aluminium piece usually, when the aluminium piece is installed, the circumstances that makes the aluminium piece appear crookedly in last plastic easily, need carry out the secondary location, cause top cap assembly's assembly efficiency lower, and the defective products appears easily, cause production quality's decline.

Therefore, there is a need to provide a novel top cap assembly, a single battery and an electric device, so as to solve the above technical problems in the prior art.

Disclosure of utility model

An object of the present utility model is to provide a top cover assembly, which can improve the positioning accuracy between an upper plastic part and a connecting pole, and facilitate the installation between the connecting pole and the upper plastic part, thereby improving the installation efficiency and the production quality of the top cover assembly.

To achieve the purpose, the utility model adopts the following technical scheme:

The top cover assembly comprises a top cover plate, a pole assembly and an upper plastic part, wherein the top cover plate is provided with a pole mounting hole, 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, 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, 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 section area of the containing groove and the cross section area of the lower half part are gradually reduced from top to bottom along the vertical direction.

Optionally, the accommodating groove is in transitional connection with the lower half, so that a gap part is formed between a circumferential inner wall of the accommodating groove and a circumferential outer wall of the lower half.

Alternatively, the cross-sectional area of the gap portion is gradually reduced from top to bottom in the vertical direction.

Optionally, a chamfer is provided at the bottom end of the lower half.

Optionally, the circumferential inner wall forming the accommodating groove and the circumferential outer wall forming the lower half are inclined planes.

Optionally, the bottom wall of the upper plastic part is convexly provided with a positioning protrusion, the top wall of the top cover plate is concavely provided with a positioning groove, and the positioning protrusion is inserted into the positioning groove.

Optionally, the positioning groove is disposed at a top port of the pole mounting hole, so that the positioning groove is disposed in communication with the pole mounting hole.

Optionally, the depth of the positioning groove is not smaller than the height of the positioning protrusion.

Another object of the present utility model is to provide a unit cell including the top cap assembly according to any one of the above aspects.

It is still another object of the present utility model to provide an electric device, which includes the battery cell according to the above-mentioned aspect.

The beneficial effects are that:

According to the cover plate assembly, the pole mounting holes are formed in the top cover plate and used for mounting the pole assembly, specifically, the switching pole of the pole assembly is penetrated in the pole mounting holes, the connecting pole which is coaxially arranged is fixedly arranged at the top of the switching pole, and the upper plastic piece is clamped between the connecting pole and the top cover plate, so that insulation between the connecting pole and the top cover plate is achieved, when the connecting pole is connected with the upper plastic piece, the lower half part of the connecting pole is inserted into the accommodating groove of the upper plastic piece, the cross sectional areas of the lower half part and the accommodating groove are gradually reduced from top to bottom in the vertical direction, the accommodating groove plays a guiding role on the installation of the lower half part, the connecting pole is located in the center of the accommodating groove during installation, the effect of improving positioning accuracy is achieved, secondary positioning is not needed, production efficiency can be improved, and production quality is higher.

Drawings

FIG. 1 is an isometric view of a cap assembly provided in an embodiment of the present utility model;

fig. 2 is a cross-sectional view of a cap assembly provided in an embodiment of the present utility model.

In the figure:

100. top cover plate, 110, pole mounting holes, 111, positioning grooves;

200. The pole assembly comprises a pole assembly, a connecting pole, a 211, a lower half part, a 212, a chamfer, a 220, a switching pole, a 230 and a gap part;

300. The plastic part is arranged, 310, the accommodating groove, 320, the positioning bulge;

400. And (5) a lower plastic part.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may, for example, be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected through an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Referring to fig. 1 and 2, the top cover assembly includes a top cover plate 100, a pole assembly 200 and an upper plastic member 300, wherein the top cover plate 100 is provided with a pole mounting hole 110, the pole assembly 200 includes a connection pole 210 and a switching pole 220 coaxially disposed, the connection pole 210 is fixedly disposed at a top end of the connection pole 210, the connection pole 210 is inserted into the pole mounting hole 110, the upper plastic member 300 is sandwiched between the connection pole 210 and a top wall of the top cover plate 100, the upper plastic member 300 is provided with a receiving slot 310, a lower half 211 of the connection pole 210 is accommodated in the receiving slot 310, and a cross-sectional area of the receiving slot 310 and a cross-sectional area of the lower half 211 are gradually reduced from top to bottom along a vertical direction.

The cover plate assembly in this embodiment is used for installing the pole assembly 200 by providing the pole mounting hole 110 on the top cover sheet 100, specifically, the switching pole 220 of the pole assembly 200 is penetrated in the pole mounting hole 110, and the top of the switching pole 220 is fixedly provided with the coaxially arranged connecting pole 210, the upper plastic part 300 is clamped between the connecting pole 210 and the top cover sheet 100, thereby realizing insulation between the connecting pole 210 and the top cover sheet 100, when the connecting pole 210 is connected with the upper plastic part 300, the lower half 211 of the connecting pole 210 is inserted into the accommodating groove 310 of the upper plastic part 300, the cross sectional areas of the lower half 211 and the accommodating groove 310 are gradually reduced from top to bottom along the vertical direction, so that the accommodating groove 310 plays a guiding role in the installation of the lower half 211, the central position of the accommodating groove 310 is ensured when the connecting pole 210 is installed, the effect of improving the positioning accuracy is achieved, the production efficiency can be improved, and the production quality is higher.

The lower half 211 in this embodiment refers to a portion of the connecting pole 210 with a cross section gradually decreasing from top to bottom, and in some embodiments, the cross section of the entire connecting pole 210 gradually decreases from top to bottom, or the cross section of the upper half of the connecting pole 210 is not limited, and may gradually decrease, remain unchanged, or gradually increase, and the cross section of the lower half 211 is gradually smaller, which may be formed as the lower half 211 in this embodiment, which is not described herein.

The function of the switching pole 220 is to lead out the current inside the single battery to the connecting pole 210, and the connecting pole 210 is connected to an external device for supplying power, which is not described herein.

A lower plastic part 400 is further sandwiched between the bottom of the switching pole 220 and the bottom wall of the top cover sheet 100, so as to insulate the switching pole 220 from the top cover sheet 100.

Alternatively, the receiving groove 310 is connected to the lower half 211 in a transitional manner such 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. Through the setting of clearance portion 230, can guarantee that lower half 211 inserts in holding tank 310 smoothly, avoid appearing blocking when the installation, improve production efficiency.

As shown in fig. 2, in the present embodiment, the cross-sectional area of the gap portion 230 gradually decreases from top to bottom in the vertical direction. Further, the cross-sectional area of the lowermost end of the gap portion 230 is zero, that is, the lowermost end of the lower half portion 211 abuts against the circumferential inner wall of the accommodating groove 310, so that the accommodating groove 310 can better perform the limiting and fixing effects on the connection pole 210, and the positioning effect is improved.

In this embodiment, a chamfer 212 is provided at the bottom end of the lower half 211. The chamfer 212 can facilitate the insertion of the connection pole 210 into the accommodating groove 310, and prevent the damage of the plastic part 300 during the insertion of the connection pole 210, thereby improving the yield of production.

With continued reference to fig. 1 and 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 section of the accommodating groove 310 and the cross section of the connecting pole 210 are square, so that 4 inclined planes are formed on the outer wall of the connecting pole 210 and the inner wall of the accommodating groove 310, and such arrangement can reduce the complexity of the appearance of the connecting pole 210, reduce the difficulty of the production process, and thereby improve the production efficiency.

Optionally, a positioning protrusion 320 is protruding from the bottom wall of the upper plastic part 300, a positioning groove 111 is concavely formed in the top wall of the top cover sheet 100, and the positioning protrusion 320 is inserted into the positioning groove 111. That is, the positioning protrusion 320 is matched with the positioning groove 111, so as to position the upper plastic part 300 by the top cover 100, thereby improving the accuracy of the position of the connection pole 210 and further improving the production quality.

Further, the positioning groove 111 is provided at the top port of the pole mounting hole 110 such that the positioning groove 111 is provided in communication with the pole mounting hole 110. By opening the positioning groove 111 at the top port of the pole mounting hole 110, the positioning groove 111 can be formed together when the pole mounting hole 110 is formed, so that the complexity of the production process is reduced, the production efficiency is improved, and the production cost is reduced.

It should be noted that the depth of the positioning groove 111 is not smaller than the height of the positioning protrusion 320. The depth of the positioning groove 111 is not larger than the height of the positioning protrusion 320, specifically, the depth of the positioning groove 111 is larger than the height of the positioning protrusion 320, so that the positioning effect of the positioning groove 111 on the positioning protrusion 320 of the upper plastic part 300 can be realized, the upper plastic part 300 is prevented from being lifted, the position accuracy of the upper plastic part 300 on the top cover sheet 100 is ensured, and the production quality is further improved.

The embodiment also provides a single battery, which comprises the top cover assembly according to any one of the schemes. The single battery can be a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid (or lead-storage) battery, a lithium ion battery, a polymer lithium ion battery and the like. The single battery can also be a lithium ion primary battery, a lithium sulfur battery, a sodium-lithium ion battery or a sodium ion battery or a magnesium ion battery, etc., and the details are not repeated here. The single battery has the beneficial effects of the top cover assembly according to any one of the above schemes, and the description is omitted here.

Specifically, the single battery uses the top cover assembly, so that the accommodating groove 310 plays a guiding role in the installation of the lower half 211 of the connecting pole 210, the central position of the accommodating groove 310 is ensured when the connecting pole 210 is installed, the effect of improving the positioning accuracy is achieved, the secondary positioning is not needed, the production efficiency of the single battery can be improved, the yield is improved, and the production quality of the single battery is higher.

The embodiment also provides an electric device, which comprises the single battery according to the scheme. The electricity utilization device can be an electric bicycle, an electric automobile, a hybrid electric automobile, a ship, energy storage equipment and the like, and only electric energy is used as an energy source, so that the details are omitted.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. A top cover assembly, comprising:

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 is characterized in that 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, characterized in that 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, characterized in that a chamfer (212) is provided at the bottom end of the lower half (211).

5. The top cover assembly according to claim 3, characterized in that 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 is characterized in that a positioning protrusion (320) is convexly provided on the bottom wall of the upper plastic part (300), and a positioning groove (111) is concavely provided on the top wall of the top cover sheet (100), and the positioning protrusion (320) is inserted into the positioning groove (111).

7. The top cover assembly according to claim 6, characterized in that the positioning groove (111) is arranged at the top port 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, characterized in that the depth of the positioning groove (111) is not less than the height of the positioning protrusion (320).

9. A single battery cell, characterized by comprising the top cover assembly according to any one of claims 1 to 8.

10. An electrical device comprising the single battery according to claim 9.