CN216958134U

CN216958134U - Shaping mechanism of roll core

Info

Publication number: CN216958134U
Application number: CN202220371098.1U
Authority: CN
Inventors: 张晓卿; 卜芳; 何兰星; 祝媛; 刘金成
Original assignee: Eve Energy Co Ltd
Current assignee: Eve Energy Co Ltd
Priority date: 2022-02-23
Filing date: 2022-02-23
Publication date: 2022-07-12
Anticipated expiration: 2032-02-23

Abstract

The utility model discloses a reshaping mechanism of a roll core, and relates to the technical field of batteries. The shaping mechanism comprises a base, a fixing component and a shaping component. The fixing assembly comprises an adjusting piece and a supporting piece, the adjusting piece is arranged on the base in a rotating mode around a vertical axis, the supporting piece is arranged on the top end adjusting piece in a rotating mode around a horizontal axis and can move relative to the adjusting piece in the vertical direction, and the supporting piece is configured to support the winding core; the shaping assembly includes a heating element configured to heat a surface of the winding core. The shaping mechanism of the roll core can eliminate unevenness of the diaphragm, so that the consistency is improved, and short circuit is prevented when the tab is inserted.

Description

Shaping mechanism of roll core

Technical Field

The utility model relates to the technical field of batteries, in particular to a reshaping mechanism of a roll core.

Background

Cylindrical batteries are one type of battery commonly used in power batteries. The cylindrical battery generally includes a battery housing, a battery roll core disposed in the housing, and end caps and conductive terminals sealed to the housing.

The winding core is formed by winding after the positive plate, the diaphragm and the negative plate are stacked, and during winding, unevenness of the diaphragm of the winding core caused by non-uniform winding can exist, so that the consistency of battery cell preparation is poor, and short circuit caused by inserting a tab into a gap between the diaphragm and the pole piece can also be caused.

In view of the above problems, there is a need to develop a reshaping mechanism for a winding core to solve the problems of poor consistency caused by unevenness of a separator of the winding core and easy short circuit when a tab is inserted.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a reshaping mechanism of a winding core, which can eliminate unevenness of a diaphragm, thereby improving consistency and preventing short circuit when a tab is inserted.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a reforming mechanism for a winding core, comprising:

a base;

the fixing assembly comprises an adjusting piece and a supporting piece, the adjusting piece is rotatably arranged on the base around an axis extending along a first direction, the supporting piece is rotatably arranged on a top end adjusting piece around an axis extending along a second direction and can move relative to the adjusting piece along the first direction, the supporting piece is configured to support the winding core, and the first direction and the second direction are arranged at an included angle;

a shaping assembly including a heating element configured to heat a surface of the winding core.

Preferably, the supporting member is provided with a plurality of adsorption holes.

Preferably, the plastic subassembly still includes the heating cabinet, the heating cabinet fixed set up in the base, the heating member scalable set up in the heating cabinet.

Preferably, the holding tank has been seted up to support piece, roll up the core set up in the holding tank.

Preferably, the accommodating groove is an arc-shaped groove.

Preferably, the inner wall of holding tank is equipped with a plurality of mounting groove along circumference interval, every all rotate in the mounting groove and set up a gyro wheel, gyro wheel part protrusion the inner wall of holding tank.

Preferably, the shape of the support surface formed by the rollers is the same as the shape of the side wall of the winding core.

Preferably, the winding device further comprises a drive assembly capable of driving the winding core to rotate on the support along the axis of the winding core.

Preferably, the driving assembly comprises a rotating arm and a driving wheel, the rotating arm is arranged on the adjusting piece, and the driving wheel is rotatably arranged on the rotating arm and can push the winding core against the supporting piece.

Preferably, a moving assembly is further included, the moving assembly comprising:

the sliding rail is arranged along the second direction;

the sliding block is arranged on the sliding rail in a sliding mode, the base is arranged on the sliding block in a sliding mode along a third direction, and the second direction and the third direction form an included angle.

The utility model has the beneficial effects that:

the utility model provides a reshaping mechanism of a winding core. In the shaping mechanism, the heating element heats the membrane, so that the membrane contracts to eliminate the bulge of the membrane or retract the edge of the membrane. The support piece of fixed subassembly is used for placing and rolls up the core, and operating personnel can make through removing the base roll up the core and be close to the heating member of plastic subassembly, heats roll up the core through the heating member, utilizes the mode of hot pressing to eliminate the position of diaphragm unevenness, improves the uniformity of electric core preparation, but also can make pole piece and diaphragm bond, eliminates the clearance between pole piece and the diaphragm, reduces the risk of short circuit.

Drawings

FIG. 1 is a schematic structural view of a reforming mechanism for a winding core according to the present invention;

fig. 2 is a schematic structural diagram of the support provided by the present invention.

In the figure:

100. a winding core;

1. a base; 2. a fixing component; 3. a shaping component; 4. a drive assembly; 5. a moving assembly;

21. an adjustment member; 22. a support member; 23. a roller; 31. a heating member; 32. a heating box; 41. a rotating arm; 42. a drive wheel; 51. a slide rail; 52. a slider;

221. and (6) accommodating the tank.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly and encompass, for example, both fixed and removable connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in direct contact with the second feature but being in contact with the second feature by another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

A cylindrical battery typically includes a battery housing, a battery roll core 100 disposed within the housing, an electrolyte, and end caps and conductive terminals sealed to the housing. In the preparation process of the battery, the winding core 100 needs to be placed in a battery case, and the case is sealed by an end cap after electrolyte is injected to form a complete battery structure. And the winding core 100 is a winding structure formed by winding a positive electrode sheet, a separator for separating the positive electrode sheet from the negative electrode sheet to prevent short circuit, and a negative electrode sheet through a winding process, wherein the separator is capable of allowing cations to pass through. The positive plate is electrically connected with the conductive terminals, and the negative plate is electrically connected with the shell of the battery so as to connect the battery into an external circuit through the conductive terminals and the shell of the battery.

In the process of winding the positive electrode plate, the separator and the negative electrode plate, the separator of the winding core 100 is not flat locally due to non-uniform winding, and the external profile of the winding core 100 is affected by the bulge, so that the performance of the battery is affected. And the uniformity of the final cell performance is poor due to the uncontrollable unevenness. If the uneven position of the separator is close to both ends of the winding core 100, the tab is easily inserted between the separator and the positive electrode sheet or the negative electrode sheet when the tab is inserted, and the short circuit is easily caused by piercing the separator. The non-uniform edges of the separator at the two ends of the winding core 100 during the winding process may also affect the protrusion of the positive or negative electrode tab from the two ends of the winding core 100 and thus the connection terminal or the battery case.

As shown in fig. 1, the present embodiment provides a reshaping mechanism for a winding core, which includes a base 1, a fixing component 2 and a reshaping component 3. The fixing assembly 2 comprises an adjusting part 21 and a supporting part 22, the adjusting part 21 is arranged on the base 1 in a rotating mode around an axis extending along the first direction X, the supporting part 22 is arranged on the adjusting part 21 in a rotating mode around an axis extending along the second direction Y and can move relative to the adjusting part 21 along the first direction X, and the supporting part 22 is configured to support the winding core 100, wherein an included angle is formed between the first direction X and the second direction Y. The reforming assembly 3 includes a heating member 31, and the heating member 31 is configured to heat the surface of the winding core 100.

In the reforming mechanism, the heating member 31 heats the diaphragm to contract the diaphragm to eliminate the protrusion of the diaphragm or to retract the edge of the diaphragm. Support piece 22 of fixed subassembly 2 is used for placing roll core 100, operating personnel can adjust the state of rolling core 100 through rotating support piece 22, when the axis of rolling core 100 is in vertical state, operating personnel removes base 1 and makes roll core 100 be close to the heating member 31 of plastic subassembly 3, heat the side of rolling core 100 through heating member 31, utilize the position of hot pressing's mode to eliminate the diaphragm unevenness, improve the uniformity of electric core preparation, and can also make pole piece and diaphragm bond, eliminate the clearance between pole piece and the diaphragm, reduce the risk of short circuit. When the axis of rolling up core 100 is in the horizontality, operating personnel can make the one end of rolling up core 100 towards heating member 31 through rotating adjusting part 21, can utilize heating member 31 to heat the diaphragm edge at roll core 100 both ends to make the diaphragm edge shrink, make positive plate or negative pole piece stretch out the diaphragm at roll core 100 both ends.

It can be understood that the heating element 31 is heating the in-process of plastic to rolling up core 100, and it is stable to roll up core 100 needs holding position, so support piece 22 has seted up a plurality of and has adsorbed the hole, adsorbs fixedly to rolling up core 100 through adsorbing the hole, can prevent to roll up core 100 and warp, plays the guard action to rolling up core 100. Specifically, the adsorption holes are uniformly distributed on the surface of the support member 22, and the adsorption holes are communicated with the vacuum pumping member, so that the adsorption holes can form negative pressure by opening the vacuum pumping member, and the winding core 100 cannot be separated from the support member 22.

Preferably, the shaping assembly 3 further comprises a heating box 32, the heating box 32 is fixedly arranged on the base 1, and the heating component 31 is telescopically arranged on the heating box 32. A wire is provided in the heating box 32 for energizing the heating member 31 to cause the heating member 31 to generate heat. When the operator brings the winding core 100 close to the heating member 31, the heating member 31 is brought into abutment with the winding core 100 and shaped by driving the heating member 31 out of the heating box 32. Furthermore, the operator can extend the heating element 31 out of the heating box 32 to increase the pressure of the heating element 31 on the winding core 100, thereby improving the shaping effect.

It will be appreciated that the fixing assembly 2 is movable relative to the base 1 in the first direction X to adjust the relative height between the winding core 100 and the heating element 31. In other embodiments, the height of the heating chamber 32 is adjustable.

Preferably, as shown in fig. 2, the supporting member 22 defines a receiving groove 221, and the winding core 100 is disposed in the receiving groove 221. Holding tank 221 can make the stability of rolling up core 100 obtain further promotion, and can make things convenient for operating personnel to place rolling up core 100 in the correct position, has reduced operating personnel to the adjustment time of rolling up core 100 position, has improved efficiency.

Specifically, the receiving groove 221 is an arc-shaped groove. The arc-shaped accommodating groove 221 can further improve the stability of the winding core 100, and prevent the winding core 100 from rolling or moving to cause the heating element 31 to damage the winding core 100.

It can be understood that when the winding core 100 is placed in the receiving groove 221, the portion located within the receiving groove 221 cannot be heated and shaped by the heating element 31, and an operator needs to rotate the winding core 100 in the receiving groove 221 to rotate the portion out of the receiving groove 221. In the rotating process, the friction between the winding core 100 and the inner wall of the accommodating groove 221 easily causes damage to one or more of the diaphragm, the positive plate or the negative plate, and affects the yield.

As shown in fig. 2, to solve this problem, a plurality of mounting grooves are formed in the inner wall of the receiving groove 221 at intervals in the circumferential direction, and one roller 23 is rotatably installed in each mounting groove, and the roller 23 partially protrudes from the inner wall of the receiving groove 221. The roller 23 can support the winding core 100, so that the winding core 100 does not contact with the inner wall of the accommodating groove 221, and when the operator rotates the winding core 100, the winding core 100 and the roller 23 have rolling friction without relative sliding, so that the winding core 100 is not damaged.

Specifically, a plurality of gyro wheels 23 that the circumference interval that sets up along rolling up core 100 forms one row, and the axial interval that follows rolling up core 100 in the holding tank 221 is provided with multirow gyro wheel 23, can enough form stable support to rolling up core 100, can make the gravity distribution of rolling up core 100 at a plurality of gyro wheels 23 again, prevents that single gyro wheel 23 from leading to the local deformation of rolling up core 100 to the holding power of rolling up core 100 too big.

Preferably, the roller 23 may be replaced by a roller arranged along the axial direction of the winding core 100, and a plurality of rollers are arranged at intervals along the circumferential direction of the winding core 100. The roller can increase the contact area with the winding core 100, further reducing the degree of deformation of the winding core 100.

Specifically, the shape of the support surface formed by the rollers 23 is the same as the shape of the side wall of the reeling core 100. Can guarantee that gyro wheel 23 all can with roll up the lateral wall butt of core 100 to reduce the deformation degree of rolling up core 100.

It can be understood that, when the core 100 is rotated, the adsorption holes stop adsorbing, and the core 100 is adsorbed and fixed when the core 100 is rotated in place.

Preferably, as shown in fig. 1, the reforming mechanism also comprises a drive assembly 4, the drive assembly 4 being able to drive the winding core 100 in rotation on the support 22 along its axis. The winding core 100 can be rotated on the supporting member 22 by the driving assembly 4, so that an operator can conveniently adjust the shaping position of the heating member 31, the automation degree of the shaping mechanism is improved, and the efficiency is improved.

Specifically, the driving assembly 4 includes a rotating arm 41 and a driving wheel 42, the rotating arm 41 is disposed on the adjusting member 21, and the driving wheel 42 is rotatably disposed on the rotating arm 41 and can press the winding core 100 against the supporting member 22. When the operator places the core 100 in the receiving groove 221, the rotating arm 41 is rotated to bring the driving wheel 42 into contact with the core 100. When the core 100 needs to be rotated for shaping, only the driving wheel 42 needs to be rotated, and the state of the core 100 does not need to be manually adjusted by an operator, so that the efficiency is improved, and the workload of the operator is reduced.

In order to further improve the automation degree of the shaping mechanism and further reduce the working strength of an operator, the shaping mechanism further comprises a moving assembly 5, the moving assembly 5 comprises a sliding rail 51 and a sliding block 52, the sliding rail 51 is arranged along the second direction Y, the sliding block 52 is arranged on the sliding rail 51 in a sliding manner, the base 1 is arranged on the sliding block 52 in a sliding manner along the third direction Z, and an included angle is formed between the second direction Y and the third direction Z. Specifically, for the convenience of adjustment by the operator, the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

The operator can move the winding core 100 by the moving assembly 5, and move the portion of the winding core 100 to be shaped to the front of the heating member 31 to perform heating and shaping. Specifically, the sliding direction of the base 1 and the sliding direction of the slider 52 are perpendicular to each other.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.

Claims

1. The utility model provides a plastic mechanism of core, its characterized in that includes:

a base (1);

a fixing assembly (2), the fixing assembly (2) comprising an adjusting member (21) and a supporting member (22), the adjusting member (21) being rotatably disposed on the base (1) about an axis extending in a first direction, the supporting member (22) being rotatably disposed on the adjusting member (21) about an axis extending in a second direction and being movable relative to the adjusting member (21) in the first direction, the supporting member (22) being configured to support the winding core (100), the first direction being disposed at an angle to the second direction;

a shaping component (3), the shaping component (3) comprising a heating element (31), the heating element (31) being configured to heat a surface of the winding core (100).

2. The reshaping mechanism for winding cores of claim 1, wherein the support member (22) is provided with a plurality of suction holes.

3. The reeling core shaping mechanism according to claim 1, characterized in that the shaping assembly (3) further comprises a heating box (32), the heating box (32) is fixedly arranged on the base (1), and the heating element (31) is telescopically arranged on the heating box (32).

4. The reshaping mechanism for winding cores according to claim 1, characterized in that the support element (22) defines a receiving groove (221), the winding core (100) being disposed in the receiving groove (221).

5. The reshaping mechanism for winding cores of claim 4, wherein the receiving groove (221) is an arc-shaped groove.

6. The reshaping mechanism for winding cores according to claim 5, wherein the inner wall of the accommodating groove (221) is provided with a plurality of circumferentially spaced mounting grooves, each mounting groove is rotatably provided with a roller (23), and the roller (23) partially protrudes from the inner wall of the accommodating groove (221).

7. The reshaping mechanism for winding cores of claim 6, characterized in that the support surface formed by several rollers (23) has the same shape as the side wall of the winding core (100).

8. The reshaping mechanism for winding cores according to claim 1, characterized in that it further comprises a drive assembly (4), said drive assembly (4) being able to drive the winding core (100) in rotation on its axis on said support (22).

9. The reshaping mechanism for winding cores according to claim 8, characterized in that the drive assembly (4) comprises a rotating arm (41) and a drive wheel (42), the rotating arm (41) being arranged on the adjustment member (21), the drive wheel (42) being rotatably arranged on the rotating arm (41) and being capable of pressing the winding core (100) against the support member (22).

10. The reshaping mechanism for winding cores of any of claims 1-9, further comprising a moving assembly (5), the moving assembly (5) comprising:

a slide rail (51), the slide rail (51) being disposed along the second direction;

the sliding block (52), the sliding block (52) slide set up in slide rail (51), base (1) along the third direction slide set up in slide block (52), the second direction with the third direction becomes the contained angle setting.