CN207887669U - Roll over lug mechanism and secondary cell - Google Patents

Abstract

The present application relates to the technical field of pole piece processing, in particular to a tab folding mechanism and a secondary battery. The tab folding mechanism includes a base, a cell fixing part, a top cover positioning part and a driving part, the cell fixing part is connected to the base, and the cell fixing part is used to fix the cell of the secondary battery The top cover positioning part is used to position the top cover of the secondary battery, the top cover positioning part is connected to the base; the driving part is installed on the base, and the driving part is connected to the base The cell fixing part and/or the top cover positioning part are connected, and the driving part is set so that under its action, the cell fixing part and the top cover positioning part are folded close to bend the cell the polar ear. The tab folding mechanism provided by the present application has simple structure, convenient operation and high tab folding efficiency.

Description

Folding lug mechanism and secondary battery

technical field

The present application relates to the technical field of pole piece processing, in particular to a tab folding mechanism, and also to a secondary battery.

Background technique

A secondary battery includes positive and negative electrode sheets with tabs. During production and processing, in order to save installation space in the secondary battery and facilitate assembly of the secondary battery, the tabs are usually bent. However, the structure of the currently common tab folding mechanism is relatively complicated, the process of folding the tabs is cumbersome, and its efficiency is low.

Utility model content

The present application provides a tab-folding mechanism and a secondary battery to solve the problem of low working efficiency of the current tab-folding mechanism.

The first aspect of the present application provides a tab folding mechanism, which includes a base;

A cell fixing part, the cell fixing part is connected to the base, and the cell fixing part is used to fix the cells of the secondary battery;

a top cover positioning part, the top cover positioning part is used for positioning the top cover of the secondary battery, and the top cover positioning part is connected with the base;

A driving part, the driving part is installed on the base, and the driving part is connected to the cell fixing part and/or the top cover positioning part, and the driving part is set so that under its action, the The fixing part of the battery cell and the positioning part of the top cover are folded close to bend the tabs of the battery cell.

Preferably, the top cover positioning part includes a plurality of flexible suction cups, and the plurality of flexible suction cups are arranged in rows and columns.

Preferably, there are two cell fixing parts, and the top cover positioning part is located between the two cell fixing parts;

The driving part includes a driving unit and a synchronizing unit, the driving unit is connected to the synchronizing unit, and the two cell fixing parts are both connected to the synchronizing unit.

Preferably, the cell fixing part includes a load-limiting part and a clamping part, and both the clamping part and the load-limiting part are installed on the base;

The load limiting portion includes a main body and a first limiting protrusion, the first limiting protrusion is connected to the base through the main body, and the main body is used to support the electric core;

The clamping portion is arranged to approach or move away from the first limiting protrusion along a first direction, so as to clamp or release the electric core.

Preferably, the clamping part includes a driving cylinder and an extruding head, the extruding head has a cell contact surface, the driving cylinder is connected to the base, the driving head of the driving cylinder is connected to the extruding head connect.

Preferably, there are multiple extrusion heads, the plurality of extrusion heads are arranged at intervals, and the cell contact surfaces of the plurality of extrusion heads are even.

Preferably, the extrusion head includes a base body and a second limit protrusion, the second limit protrusion is connected with the driving head of the driving cylinder through the base body, and the base body Opposite to the first limiting protrusion, the second limiting protrusion cooperates with the battery core along the thickness direction of the battery cell.

Preferably, there are a plurality of the first limiting protrusions and the base body, and along the first direction, the plurality of the first limiting protrusions are arranged in one-to-one correspondence with the plurality of the base bodies.

Preferably, the tab folding mechanism provided in the present application further includes a buffer portion, the base includes a bottom plate and a mounting frame, the mounting frame is connected to the bottom plate, the cell fixing portion and the top cover positioning portion are both Installed on the installation frame; the buffer part is connected with the bottom plate, and along the thickness direction of the battery core, the buffer part is arranged below the battery core fixing part.

The second aspect of the present application also provides a secondary battery, which is formed by assembling the tab folding mechanism provided by any one of the above, the secondary battery includes a top cover and a battery cell, and the tab of the battery cell is connected to the top cover .

The technical solution provided by the application can achieve the following beneficial effects:

In the tab folding mechanism provided in this application, the battery cell and the top cover in the secondary battery can be positioned through the cell fixing part and the top cover positioning part respectively, and the driving part is controlled to operate during the tab bending process. That is to say, the fixing part of the battery cell and the positioning part of the top cover can be folded and approached, so as to complete the bending work of the tab of the battery cell in the secondary battery, and the tab folding mechanism provided by the application has a simple structure , easy to operate, and the efficiency of folding tabs is relatively high.

It is to be understood that both the foregoing general description and the following detailed description are exemplary only and are not restrictive of the application.

Description of drawings

Fig. 1 is a structural schematic diagram of the tab folding mechanism provided by the embodiment of the present application;

Fig. 2 is a schematic diagram of cooperation between the folding lug mechanism and the secondary battery provided by the embodiment of the present application;

Fig. 3 is a view in a certain direction of the structure of the collapsing tab mechanism and the secondary battery;

Fig. 4 is a view in another direction of the structure of the collapsing tab mechanism and the secondary battery;

Fig. 5 is a view in another direction of the cooperation structure of the tab folding mechanism and the secondary battery.

Reference signs:

1 - base;

11 - bottom plate;

12 - Mounting frame;

121-linear bearing;

2-Top cover positioning part;

21 - flexible suction cup;

3-cell fixing part;

31 - bearing limit part;

311 - subject;

312-the first limit protrusion;

32-clamping part;

321-drive cylinder;

322-extrusion head;

322a-substrate;

322aa-cell contact surface;

322b-the second limit protrusion;

4- drive unit;

41 - drive unit;

42 - synchronization unit;

5 - Buffer;

6- Secondary battery;

61-battery core;

611 - polar ear;

62 - Top cover.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description serve to explain the principles of the application.

Detailed ways

The present application will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

As shown in Figures 1-5, the embodiment of the present application provides a tab folding mechanism, which includes a base 1, a cell fixing part 3, a top cover positioning part 2 and a driving part 4; wherein, the cell The fixing part 3, the top cover positioning part 2 and the driving part 4 are all installed on the base 1, and the cell 61 and the top cover 62 of the secondary battery 6 can be respectively fixed by the cell fixing part 3 and the top cover positioning part 2. ; In the entire tab folding mechanism, only the cell fixing part 3 can be connected with the driving part 4, so that the cell fixing part 3 can be folded under the action of the driving part 4, and then the tab of the cell 61 can be driven 611 is bent; of course, the top cover positioning part 2 can also be connected with the driving part 4 to control the top cover positioning part 2 to turn over to realize the purpose of bending the tab 611; in addition, the cell fixing part 3 and the top cover The positioning part 2 can also be connected with the driving part 4, and both of them are arranged in a movable structure relative to the base 1, so that under the action of the driving part 4, both of them can be folded in a direction close to the other side, With such an arrangement, the bending work of the tab 611 can also be completed. Specifically, the base 1 can be a basic structure formed of metal materials, and the cell fixing part 3 and the top cover positioning part 2 can be connected to the base 1 through mechanisms such as linear bearings 121 and other connectors; A clamping mechanism or a clamping mechanism can be provided to fix the battery cell 61; correspondingly, the top cover positioning part 2 can also complete the positioning of the top cover 62 by setting a clamping mechanism or a clamping mechanism. In addition, because the weight of the top cover 62 is relatively small, the top cover positioning part 2 can also achieve the purpose of positioning the top cover 62 by means of vacuum adsorption.

As can be seen from the above, in the tab folding mechanism provided by the present application, the cell 61 and the top cover 62 in the secondary battery 6 can be positioned through the cell fixing part 3 and the top cover positioning part 2 respectively, and the tabs 611 are bent During the process, the operation of the driving part 4 is controlled, so that the cell fixing part 3 and the top cover positioning part 2 can be folded and approached, so as to complete the bending work of the tab 611 of the cell 61 in the secondary battery 6, Therefore, the structure of the tab folding mechanism provided in the present application is simple, the operation is convenient, and the efficiency of folding the tabs 611 is relatively high.

Further, in order to improve the yield rate of the bent tab 611 , the top cover positioning part 2 may include a plurality of flexible suction cups 21 , and the plurality of flexible suction cups 21 may be arranged in rows and columns. Under the adsorption of the flexible suction cup 21, the position of the top cover 62 can be limited within a certain range; at the same time, in the process of bending the tab 611, due to the characteristics of the flexible suction cup 21 itself, the top cover 62 can be within a certain range. Move within a certain range to prevent the tab 611 with a small thickness from being torn due to a change in the distance between the battery core 61 and the top cover 62 . Specifically, the flexible suction cup 21 can communicate with the vacuum generating device to position the top cover 62 of the secondary battery 6 by negative pressure adsorption.

Considering that the number of battery cells 61 contained in different secondary batteries 6 is different, and the number of battery cells 61 corresponding to a single top cover 62 is different, for example, the battery cell fixing part 3 in the tab folding mechanism provided by this application Two can be provided, and one top cover positioning part 2 is provided, and the top cover positioning part 2 can be arranged between two cell fixing parts 3; The core 61 can be assembled with the top cover 62, and the driving part 4 can include a driving unit 41 and a synchronizing unit 42. The driving unit 41 and the synchronizing unit 42 are connected to each other, and the two cell fixing parts 3 are connected to the synchronizing unit 42. During the process of folding the tab 611, the drive unit 41 drives the synchronization unit 42 to move, and the synchronization unit 42 can drive the two cell fixing parts 3 to turn over at the same time, so that in the process of bending the tab 611, the two cells 61 are evenly Assembled on the top cover 62; in this case, the top cover positioning part 2 can be fixedly installed on the base 1, the driving part 4 is connected to the cell fixing part 3, and the cell fixing part 3 is flexibly connected to the base 1, Under the action of the driving part 4 , the bending of the tab 611 of the cell 61 is completed. Specifically, the drive unit 41 can be a motor, and the drive unit 41 can also be connected to a speed reducer, the synchronization unit 42 can be a gear set, the motor is connected to the gear set through the speed reducer, and the gear set is also connected to the electric core fixing part 3 in transmission, When the tab 611 needs to be bent, the motor is controlled to drive the gear set to rotate, so as to drive the two cell fixing parts 3 to turn over synchronously.

Further, as shown in FIG. 2 , the cell fixing part 3 may include a load-limiting part 31 and a clamping part 32 , both the clamping part 32 and the load-limiting part 31 may be installed on the base 1 , and the load-limiting part 31 It may include a main body 311 and a first limiting protrusion 312, the first limiting protrusion 312 may be connected to the base 1 through the main body 311, and the electric core 61 may be supported on the main body 311 before the tab 611 is bent, In the first direction, the first limiting protrusion 312 can limitly cooperate with the electric core 61; when the electric core 61 is placed on the main body 311, the action of the clamping part 32 is controlled, and the clamping part 32 can move closer or farther away. When the clamping part 32 moves in the direction of the first limiting protrusion 312, when the clamping part 32 is close to the first limiting protrusion 312, the battery cell 61 can be clamped by the clamping part 32 and the first limiting protrusion 312 to prevent When the battery cell fixing part 3 is turned over, the battery cell 61 falls. After the work of bending the tab 611 is completed, the corresponding equipment can be controlled to grab the assembled secondary battery 6. In this During the process, the clamping portion 32 can be controlled to move away from the first limiting protrusion 312 to release the secondary battery 6 . The battery cell 61 is fixed in such a way that the clamping portion 32 is close to the main body 311 to clamp the battery cell 61 , the reliability is high, and the battery cell 61 is not easy to fall during the turning process. It should be noted that the aforementioned first direction may be direction A in FIG. 3 , and the thickness direction of the battery cell 61 may be direction B in FIG. 3 .

Further, the clamping part 32 may include a driving cylinder 321 and an extrusion head 322, the extrusion head 322 has a cell contact surface 322aa, the driving cylinder 321 is connected to the base 1, and the driving head of the driving cylinder 321 is connected to the extrusion head 322, Driven by the driving head of the driving cylinder 321, the extrusion head 322 can push the extrusion head 322 into contact with the battery cell 61 and clamp the battery cell 61. The cell contact surface 322aa of the extrusion head 322 can be a The plane parallel to the opposite surface of 61 may also be set as a rough surface, so as to increase the clamping force with the battery core 61 .

In order to further improve the clamping effect of the battery cell 61, preferably, multiple extrusion heads 322 can be provided, and the multiple extrusion heads 322 can be arranged at intervals, and the cell contact surfaces 322aa of the multiple extrusion heads 322 can be set to be flat. together. A plurality of extruding heads 322 are all in contact with the battery cell 61. This way of increasing the pressure between the battery cell 61 and the extruding head 322 can improve the clamping effect of the battery cell fixing part 3 on the battery cell 61, so as to further prevent The battery core 61 falls during the folding process. Specifically, two, three or more extrusion heads 322 can be provided, and the structures of the plurality of extrusion heads 322 can be the same, or the specific structure of each extrusion head 322 can be adjusted according to the actual situation, so as to ensure that the cells The fixing part 3 has sufficient clamping capacity for the electric core 61 .

Further, as shown in FIG. 3 , the extrusion head 322 may include a base body 322a and a second limiting protrusion 322b, and the second limiting protrusion 322b may be connected with the driving head of the driving cylinder 321 through the base body 322a, along the first direction , the base body 322a is arranged opposite to the first stop protrusion 312 to clamp the battery cell 61 under the action of the driving cylinder 321, considering that the battery cell 61 acts on the battery cell fixing part 3 during the folding process of the battery cell 61 The force is always changing. Preferably, along the thickness direction of the battery cell 61, the second limiting protrusion 322b is limitedly fitted with the battery cell 61, so as to further prevent the battery cell 61 from falling during the folding process. Specifically, the second limiting protrusion 322b and the base body 322a can be integrally formed, which can be an inverted L-shaped structure, and the base body 322a can be connected to the driving head of the driving cylinder 321 through a connecting piece. 32 approaches the first limiting protrusion 312, the base 322a gradually approaches the battery cell 61, and finally contacts the battery cell 61 to cooperate with the first limiting protrusion 312 to complete the clamping work of the battery cell 61. At this time, along the thickness direction of the battery cell 61 , the second limiting protrusion 322 b is located on one side of the battery cell 61 , so as to clamp the battery cell 61 on the bearing limiting portion 31 .

Further, multiple first limiting protrusions 312 and bases 322a may also be provided, and along the first direction, multiple bases 322a and multiple first limiting protrusions 312 are provided in one-to-one correspondence. Specifically, the number of the base body 322a and the second limiting protrusion 322b can be the same. During the production process of the extrusion head 322, the base body 322a and the second limiting protrusion 322b can be integrally formed. The number of the main body 311 and the first stop protrusion 312 in 31 can also be equal to the number of the base body 322a, and along the first direction, the base body 322a and the first stop protrusion 312 are opposite, so that the clamping part 32 clamps When the battery core 61 is tightened, the forces exerted by the first limiting protrusion 312 and the base body 322 a on the battery core 61 can almost cancel each other, and the battery core 61 will not be deflected.

Further, as shown in FIG. 5 , the base 1 may include a bottom plate 11 and a mounting frame 12, the mounting frame 12 is connected to the bottom plate 11, and both the cell fixing part 3 and the top cover positioning part 2 may be installed on the mounting frame 12, wherein, The top cover positioning part 2 can be fixedly connected to the mounting frame 12 by fasteners, and the cell fixing part 3 can be flexibly connected to the mounting frame 12 through a linear bearing 121; since the cell fixing part 3 is completing a cell 61 turning process After that, it is necessary to return to the original position, and in the process of resetting the cell fixing part 3, in order to prevent the cell fixing part 3 from directly returning to the position before the flip, causing damage to the cell fixing part 3 or the base 1, preferably, this The tab folding mechanism provided in the application also includes a buffer part 5, which may include an elastic structure to provide a buffer for the reset process of the cell fixing part 3, and the buffer part 5 may be fixedly connected to the bottom plate 11 through a connector, And along the thickness direction of the cell 61, the buffer portion 5 is arranged opposite to the cell fixing portion 3, and one cell fixing portion 3 can be provided with one or more buffer portions 5 correspondingly, and the buffer portion 5 is arranged on the cell fixing portion 5 as much as possible. at the central area of Section 3.

Based on the tab folding mechanism provided in any of the above embodiments, the present application also provides a secondary battery 6, which includes a top cover 62 and a cell 61, the tab 611 of the cell 61 is connected to the top cover 62, and the two The assembly work of the secondary battery 6 can be completed by the tab folding mechanism provided by any of the above-mentioned embodiments.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims (10)

1. A tab-folding mechanism for bending tabs of batteries in secondary batteries, characterized in that it comprises: base; A cell fixing part, the cell fixing part is connected to the base, and the cell fixing part is used to fix the cells of the secondary battery; a top cover positioning part, the top cover positioning part is used for positioning the top cover of the secondary battery, and the top cover positioning part is connected with the base; A driving part, the driving part is installed on the base, and the driving part is connected to the cell fixing part and/or the top cover positioning part, and the driving part is set so that under its action, the The fixing part of the battery cell and the positioning part of the top cover are folded close to bend the tabs of the battery cell. 2 . The tab folding mechanism according to claim 1 , wherein the top cover positioning portion includes a plurality of flexible suction cups, and the plurality of flexible suction cups are arranged in rows and columns. 3 . 3. The tab folding mechanism according to claim 1, wherein there are two cell fixing parts, and the top cover positioning part is located between the two cell fixing parts; The driving part includes a driving unit and a synchronizing unit, the driving unit is connected to the synchronizing unit, and the two cell fixing parts are both connected to the synchronizing unit. 4. The tab folding mechanism according to claim 1, wherein the cell fixing part includes a load limiting part and a clamping part, and both the clamping part and the load limiting part are installed on the on the base; The load limiting portion includes a main body and a first limiting protrusion, the first limiting protrusion is connected to the base through the main body, and the main body is used to support the electric core; The clamping portion is arranged to approach or move away from the first limiting protrusion along a first direction, so as to clamp or release the electric core. 5. The tab folding mechanism according to claim 4, wherein the clamping part comprises a driving cylinder and an extruding head, the extruding head has a cell contact surface, and the driving cylinder and the base connected, the driving head of the driving cylinder is connected with the extrusion head. 6. The tab folding mechanism according to claim 5, characterized in that, the extrusion head is provided with a plurality, the plurality of extrusion heads are arranged at intervals, and the electric cores of the plurality of extrusion heads are in contact with each other. Face flush. 7. The tab folding mechanism according to claim 5, wherein the extruding head comprises a base body and a second stop protrusion, and the second stop protrusion passes through the base body and the driving cylinder Along the first direction, the base body is arranged opposite to the first limiting protrusion, and along the thickness direction of the electric core, the second limiting protrusion is opposite to the limiting protrusion of the electric core. bit fit. 8. The tab folding mechanism according to claim 7, wherein a plurality of the first limiting protrusions and the base are provided, and along the first direction, a plurality of the first The position-limiting protrusions are provided in one-to-one correspondence with the plurality of base bodies. 9. The tab folding mechanism according to claim 1, further comprising a buffer portion, the base includes a bottom plate and a mounting frame, the mounting frame is connected to the bottom plate, the cell fixing portion and the The positioning parts of the top cover are all installed on the installation frame; the buffer part is connected with the bottom plate, and along the thickness direction of the battery cell, the buffer part is arranged below the cell fixing part. 10. A secondary battery formed by assembling the tab folding mechanism according to any one of claims 1-9, characterized in that it includes a top cover and a battery cell, and the tab of the battery cell is connected to the top cover. Cover connection.