CN220491943U

CN220491943U - Pole piece winding mechanism, winding core and battery core

Info

Publication number: CN220491943U
Application number: CN202322144238.9U
Authority: CN
Inventors: 董冰; 程胜兵; 吴伟军
Original assignee: Cornex New Energy Co ltd
Current assignee: Cornex New Energy Co ltd
Priority date: 2023-08-09
Filing date: 2023-08-09
Publication date: 2024-02-13
Anticipated expiration: 2033-08-09

Abstract

The utility model provides a pole piece winding mechanism, a winding core and an electric core. The winding core comprises a pole piece winding mechanism and a pole piece, the pole piece is fixedly connected with the telescopic end of the scroll spring, the pole piece is wound and formed on the periphery of the scroll spring, and the maximum moving distance of the telescopic end is greater than or equal to the length of the pole piece. The electric core comprises a winding core and an electric core shell, and the mandrel, the scroll spring and the winding core are all arranged in the cavity. The utility model can automatically complete winding of the pole piece without large-scale winding equipment, reduces the production cost and improves the production efficiency. And the central part of the electric core can be effectively supported by the mandrel and the scroll spring, so that collapse caused by overlong service time is avoided.

Description

Pole piece winding mechanism, winding core and battery core

Technical Field

The utility model relates to the technical field of batteries, in particular to a pole piece winding mechanism, a winding core and an electric core.

Background

The cylindrical battery cell comprises a shell, a winding core and an end cover, wherein the winding core is formed by winding a positive plate, a negative plate and a diaphragm. In the prior art, winding of the winding core is usually performed in winding equipment, which is expensive, and the production cost is increased. And the central part of the winding core is easy to collapse due to overlong service life, so that the normal use of the battery core is affected.

Disclosure of Invention

The utility model aims to solve at least one of the technical problems in the related art to a certain extent, and therefore, the embodiment of the utility model provides a pole piece winding mechanism, a winding core and an electric core, which can reduce the production cost.

In one aspect, an embodiment of the present utility model provides a pole piece winding mechanism, including: the core shaft is connected in the battery core shell; the spiral spring is provided with a fixed end and a telescopic end, the fixed end of the spiral spring is fixedly connected with the mandrel, and the telescopic end of the spiral spring is suitable for being connected with the pole piece.

According to the utility model, the mandrel and the scroll spring are arranged, so that the pole piece can be automatically wound, large-scale winding equipment is not needed, the production cost is reduced, and the production efficiency is improved. And the central part of the electric core can be effectively supported by the mandrel and the scroll spring, so that collapse caused by overlong service time is avoided.

Another embodiment of the present utility model provides a winding core, including: the pole piece winding mechanism and the pole piece are characterized in that the pole piece is fixedly connected with the telescopic end of the scroll spring, the pole piece is wound and formed on the periphery of the scroll spring, and the maximum moving distance of the telescopic end is greater than or equal to the length of the pole piece.

The utility model winds the pole piece on the periphery of the scroll spring, reduces the production cost and improves the production efficiency.

An embodiment of a third aspect of the utility model provides a battery cell, which comprises the winding core and a battery cell shell, wherein the battery cell shell is provided with a cavity, a mandrel, a spiral spring and the winding core are all arranged in the cavity, the battery cell shell is connected with a positive pole and a negative pole, a positive plate of the winding core is electrically connected with the positive pole, a negative plate of the winding core is electrically connected with the negative pole, an insulating layer is arranged outside the mandrel or the mandrel is made of an insulating material.

In some embodiments, the cavity is cylindrical, the mandrel is fixed in the center of the cavity along the axial direction, and the winding core is pressed between the inner peripheral surface of the electric core shell and the scroll spring.

In some embodiments, one end of the mandrel is fixedly connected to the positive post, and the other end of the mandrel is fixedly connected to the negative post.

In some embodiments, the cylindrical cell further comprises a positive current collecting plate and a negative current collecting plate, the positive plate is electrically connected with the positive post through the positive current collecting plate, and the negative plate is electrically connected with the negative post through the negative current collecting plate.

In some embodiments, the positive electrode current collecting disc is connected to the positive electrode post by a first elastic conductive member, and the negative electrode current collecting disc is connected to the negative electrode post by a second elastic conductive member.

In some embodiments, one end of the mandrel is fixedly connected to the positive current collecting plate, and the other end of the mandrel is fixedly connected to the negative current collecting plate.

In some embodiments, the cell housing comprises: the device comprises a shell, a first cover plate and a second cover plate, wherein the shell is provided with a first mounting port and a second mounting port which are respectively positioned at two ends of the shell; the first cover plate is connected with the first mounting port in a sealing way, and the positive pole is connected with the first cover plate; the second cover plate is connected with the second mounting port in a sealing way, and the negative pole column is connected with the second cover plate.

In some embodiments, the width of the spiral spring is greater than or equal to the width of the winding core, and the outer part of the spiral spring is provided with an insulating layer or the spiral spring is made of an insulating material.

Drawings

The foregoing and/or additional aspects and advantages of the present utility model will become apparent and may be better understood from the following description of embodiments with reference to the accompanying drawings,

wherein:

FIG. 1 is a schematic diagram of a cylindrical cell in an embodiment of the utility model;

FIG. 2 is a schematic diagram of the internal structure of a cylindrical cell in an embodiment of the utility model;

reference numerals:

1-a positive electrode post; 2-a first cover plate; 3-a first elastic conductive element; 4-an anode current collecting disc; 5-pole pieces; 6-a mandrel; 7-a housing; 8-a second cover plate; 9-a negative electrode current collecting disc; 10-a second elastic conductive element; 11-negative pole.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

The pole piece winding mechanism, the winding core and the battery core according to the embodiment of the utility model are described below with reference to fig. 1 and 2.

In one aspect, an embodiment of the present utility model provides a pole piece winding mechanism, including: the core shaft 6 and the scroll spring are connected with the core shaft 6 in the battery cell shell; the spiral spring is provided with a fixed end and a telescopic end, wherein the fixed end of the spiral spring is fixedly connected with the mandrel 6, and the telescopic end of the spiral spring is suitable for being connected with the pole piece 5.

According to the utility model, the mandrel 6 and the spiral spring are arranged, so that the pole piece 5 can be automatically wound, large-scale winding equipment is not needed, the production cost is reduced, and the production efficiency is improved. And the central shaft 6 and the scroll spring can effectively support the central part of the battery cell, so that collapse caused by overlong service time is avoided.

Further, the fixed end of the spiral spring is positioned at the center of the spiral spring, and the telescopic end is positioned at the outermost side of the spiral spring. The fixed end of the spiral spring is sleeved outside the mandrel 6 and fixedly connected. The fixing means may be conventional means such as bonding, welding or fixing, and if a fixing is used, insulation treatment is required for the fixing.

It should be noted that, the spiral spring is not shown in the drawings, the principle of the utility model is the same as that of the tape measure, the spiral spring is in a conventional structure, the width of the spiral spring is equal to or greater than the width of the pole piece 5, and the length and the expansion amount of the spiral spring are enough to fully wind the pole piece 5 after being unfolded.

As shown in fig. 1 and 2, another embodiment of the present utility model provides a winding core, including: the pole piece winding mechanism and the pole piece 5 are characterized in that the pole piece 5 is fixedly connected with the telescopic end of the scroll spring, the pole piece 5 is wound and formed on the periphery of the scroll spring, and the maximum moving distance of the telescopic end is greater than or equal to the length of the pole piece 5.

The utility model winds the pole piece 5 around the periphery of the spiral spring, reduces the production cost and improves the production efficiency.

In actual use, the pole piece 5 is tensioned by the tensioning device so as to tightly wind the spiral spring.

An embodiment of the third aspect of the present utility model provides an electrical core, including the above-mentioned winding core and an electrical core shell, where the electrical core shell has a cavity, and the mandrel 6, the spiral spring and the winding core are all disposed in the cavity, the electrical core shell is connected with the positive pole 1 and the negative pole 11, the positive plate of the winding core is electrically connected with the positive pole 1, the negative plate of the winding core is electrically connected with the negative pole 11, and the outside of the mandrel 6 has an insulating layer or the mandrel 6 is made of an insulating material.

Further, the case 7 is formed by winding a metal plate, wrapping the wound metal plate around the wound core, and welding the wound joint to form the case 7. The housing 7 is insulated as necessary to prevent shorting of the winding core or pole through the housing 7.

Further, the outside of the core shaft 6 has an insulating layer or the core shaft 6 is made of an insulating material in order to prevent the winding core or the pole from being short-circuited through the core shaft 6. In this case, the upper and lower ends of the wrap spring do not contact the pole. If the spiral spring contacts with the pole, the spiral spring needs to be insulated, such as coating an insulating layer on the outer part of the spiral spring or adopting an insulating material. The mandrel 6 and the spiral spring are insulated from the positive pole 1 and the negative pole 11.

In some embodiments, the cavity is cylindrical, and the mandrel 6 is fixed in the center of the cavity along the axial direction, and the winding core is pressed between the inner peripheral surface of the cell casing and the spiral spring.

Further, the outermost layer of the winding core is a diaphragm so as to prevent the winding core from being connected with the battery cell shell in a conductive way so as to generate short circuit.

In some embodiments, one end of the mandrel 6 is fixedly connected to the positive electrode post 1, and the other end of the mandrel 6 is fixedly connected to the negative electrode post 11.

In some embodiments, the cylindrical battery cell further comprises a positive current collecting disc 4 and a negative current collecting disc 9, wherein the positive plate is electrically connected with the positive pole 1 through the positive current collecting disc 4, and the negative plate is electrically connected with the negative pole 11 through the negative current collecting disc 9.

In some embodiments, positive current collecting plate 4 is connected to positive electrode column 1 by first elastic conductive member 3, and negative current collecting plate 9 is connected to negative electrode column 11 by second elastic conductive member 10.

Further, the first elastic conductive element 3 and the second elastic conductive element 10 have the same structure and are springs, one or more springs can be arranged, and if a plurality of springs are arranged, the plurality of springs are uniformly distributed on the current collecting disc. The upper end and the lower end of the winding core are tightly abutted with the positive pole piece and the positive pole post 1 to conduct electricity by extruding the first elastic conductive piece 3 and the second elastic conductive piece 10, and the negative pole piece is tightly abutted with the negative pole post 11 to conduct electricity without welding operation.

In some embodiments, one end of mandrel 6 is fixedly connected to positive current collector disk 4 and the other end of mandrel 6 is fixedly connected to negative current collector disk 9.

When the current collecting plate is provided, the mandrel 6 is fixedly connected to the current collecting plate. If no current collecting disc is arranged, the mandrel 6 is directly and fixedly connected with the pole.

In some embodiments, the cell housing comprises: the shell 7, the first cover plate 2 and the second cover plate 8, wherein the shell 7 is provided with a first mounting port and a second mounting port, and the first mounting port and the second mounting port are respectively positioned at two ends of the shell 7; the first cover plate 2 is in sealing connection with the first mounting port, and the positive pole 1 is connected with the first cover plate 2; the second cover plate 8 is in sealing connection with the second mounting opening, and the negative electrode column 11 is connected to the second cover plate 8.

In some embodiments, the width of the spiral spring is greater than or equal to the width of the winding core, the outside of the spiral spring is provided with an insulating layer or the spiral spring is made of an insulating material.

When the spiral spring is used, the fixed end of the spiral spring is fixedly connected with the mandrel 6, the first cover plate 2, the positive pole column 1 and the positive pole current collecting disc 4 are assembled, the second cover plate 8, the negative pole column 11 and the negative pole current collecting disc 9 are assembled, the lower end of the mandrel 6 is fixedly connected with the negative pole current collecting disc 9, the mandrel 6 and the second cover plate 8 are positioned and fixed through the clamp, and movement in the winding process of the pole piece 5 is prevented. The telescopic end of the spiral spring is outwards stretched to the limit position, the pole piece 5 in the unfolded state is conveyed to the telescopic end of the spiral spring through the conveying device, one end of the pole piece 5 is fixedly connected with the telescopic end, and the fixing mode can be fixed in a conventional mode such as bonding, fixing pieces and the like. After the telescopic end of the scroll spring is loosened, the scroll spring automatically winds the pole piece 5 through the elastic restoring force of the scroll spring, the transmission speed of the transmission device can be controlled in the process of transmitting the pole piece 5, and a tensioning device can be arranged between the transmission device and the scroll spring to provide tensioning force for the pole piece 5. After winding, a winding core is formed, the upper end of the mandrel 6 is fixedly connected with the positive current collecting disc 4, the positive plate of the winding core is abutted with the positive current collecting disc 4, and the negative plate of the winding core is abutted with the negative current collecting disc 9. The metal plate is wound around the outside of the winding core, and the seam is welded after the winding core is pressed, so that a cylindrical shell 7 is formed. The bottom of the housing 7 is welded to the second cover plate 8. The first cap plate 2 is pressed downward toward the negative electrode post 11 so that the edge of the first cap plate 2 contacts the upper end of the case 7, and then welded and fixed. At this time, the positive electrode sheet is tightly pressed against the positive electrode current collecting plate 4, and the negative electrode sheet is tightly pressed against the negative electrode current collecting plate 9.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

The terms "some embodiments" and the like, in the present disclosure, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments. Furthermore, the various embodiments described in this specification, as well as the features of the various embodiments, can be combined and combined by one skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims

1. A pole piece winding mechanism, comprising:

the core shaft (6) is connected in the battery cell shell;

the scroll spring is provided with a fixed end and a telescopic end, the fixed end of the scroll spring is fixedly connected with the mandrel (6), and the telescopic end of the scroll spring is suitable for being connected with the pole piece (5).

2. A winding core, comprising:

the pole piece winding mechanism of claim 1;

the pole piece (5), pole piece (5) fixed connection the flexible end of scroll spring, pole piece (5) coiling shaping is in the periphery of scroll spring, the maximum distance of movement of the flexible end of scroll spring is greater than or equal to the length of pole piece (5).

3. A cell, comprising:

the winding core of claim 2;

the battery cell shell, the battery cell shell has the cavity, dabber (6) the spiral spring with the core is all located in the cavity, the battery cell shell is connected with anodal post (1) and negative pole post (11), the positive pole piece of core with anodal post (1) conductive connection, the negative pole piece of core with negative pole post (11) conductive connection, the outside of dabber (6) has the insulating layer or dabber (6) are made by insulating material.

4. A cell according to claim 3, wherein the cavity is cylindrical, the core shaft (6) is axially fixed in the center of the cavity, and the winding core is pressed between the inner peripheral surface of the cell casing and the spiral spring.

5. A cell according to claim 3, characterized in that one end of the mandrel (6) is fixedly connected to the positive post (1), and the other end of the mandrel (6) is fixedly connected to the negative post (11).

6. A cell according to claim 3, further comprising a positive current collecting plate (4) and a negative current collecting plate (9), the positive plate being electrically connected to the positive electrode column (1) by the positive current collecting plate (4), the negative plate being electrically connected to the negative electrode column (11) by the negative current collecting plate (9).

7. The cell according to claim 6, wherein the positive current collecting plate (4) is connected to the positive electrode column (1) by a first elastic conductive member (3), and the negative current collecting plate (9) is connected to the negative electrode column (11) by a second elastic conductive member (10).

8. The cell according to claim 6, characterized in that one end of the mandrel (6) is fixedly connected to the positive current collecting plate (4), and the other end of the mandrel (6) is fixedly connected to the negative current collecting plate (9).

9. The cell of claim 3, wherein the cell housing comprises:

the shell (7) is provided with a first mounting port and a second mounting port, and the first mounting port and the second mounting port are respectively positioned at two ends of the shell (7);

the first cover plate (2) is connected with the first mounting port in a sealing way, and the positive pole (1) is connected with the first cover plate (2);

the second cover plate (8), second cover plate (8) with second installation mouth sealing connection, negative pole post (11) connect in second cover plate (8).

10. A cell according to claim 3, wherein the width of the spiral spring is equal to or greater than the width of the winding core, the outside of the spiral spring is provided with an insulating layer or the spiral spring is made of an insulating material.