CN218919006U - Pole piece lamination device - Google Patents

Abstract

The utility model provides a pole piece lamination device, which comprises a lamination table, conveying units and a manipulator, wherein the conveying units are arranged on two opposite sides of the lamination table; the bearing part on one conveying unit is used for bearing and conveying the positive plate to the lamination table, the bearing part on the other conveying unit is used for bearing and conveying the negative plate to the lamination table, the manipulator is provided with two mechanical arms, the adsorption parts for adsorbing the positive plate are respectively rotationally arranged on the mechanical arms, and the two adsorption parts alternately move between the discharge end of the conveying unit and the lamination table due to the fact that the two mechanical arms are driven to reciprocally rotate, so that the positive plate and the negative plate are alternately stacked on the lamination table in a preset gesture. According to the pole piece lamination device, the positive pole piece and the negative pole piece are respectively conveyed to the lamination table through the bearing parts in the two conveying units, and the positive pole piece and the negative pole piece can be alternately stacked on the lamination table in a preset gesture by the two mechanical arms in the mechanical arm, so that the lamination efficiency of the pole pieces is improved.

Description

Pole lamination device

technical field

The utility model relates to the technical field of power batteries, in particular to a pole piece stacking device.

Background technique

At present, lithium-ion batteries have the advantages of high specific energy, many cycles, long storage time, and large capacity of single cells, and are not only widely used in portable electronic devices, such as mobile phones, digital cameras, and laptops; and It is also widely used in fields such as electric bicycles, electric vehicles, mobile base stations and energy storage power stations. It can be seen that lithium-ion batteries have a broad market space. In this case, the product quality and production efficiency of batteries in the production process are particularly important.

In the production process of lithium batteries, there are mainly two processes: winding and lamination. In comparison, the laminated cell has lower internal resistance, higher discharge platform, high capacity density and high energy density than the winding process, and has a relatively wide range of applications. However, the complexity of the lamination process limits the production efficiency. The existing lamination process relies on mechanical reciprocating actions, and its efficiency is far inferior to the processing speed of the winding process.

By comparing the winding process, the mechanical action of the lamination process is not smooth. The main pain points are: First, at this stage, the lamination is mainly carried out by the reciprocating movement of the lamination table or the feeding mechanism. The mechanical action is not coherent, and it is inevitable Causes the waste of redundant working steps, thereby makes the efficiency of lamination low. Second, in order to ensure the alignment of the laminations, each time the positive and negative electrodes are loaded and dropped, a fixed pause time must be used between the lamination table and the feeding mechanism, resulting in waste of production capacity. Third, at present, the transportation of pole pieces mainly depends on the vacuum belt for transportation, the feeding rhythm and material position deviation is relatively large, and the timing of the timing occupied by the alignment is relatively long.

Utility model content

In view of this, the utility model aims to provide a pole piece stacking device to improve the pole piece stacking efficiency.

In order to achieve the above object, the technical solution of the utility model is achieved in that:

A pole piece stacking device, comprising a stacking table, conveying units arranged on two opposite sides of the stacking table, and a manipulator;

Each of the conveying units has a plurality of supporting parts that are slidably arranged, and the supporting parts on one of the conveying units are used to support and transport the positive electrode sheet to the stacking table, and the supporting parts on the other conveying unit The supporting part is used to support and transport the negative electrode sheet to the stacking table, and the positive electrode sheet or the two opposite sides of the negative electrode sheet are compounded with a separator;

The manipulator has two relatively fixed mechanical arms, and each of the mechanical arms is rotatably provided with an adsorption part for absorbing the pole pieces. Because the two mechanical arms are driven to rotate back and forth, the two adsorption parts are alternately moved by the two mechanical arms. The discharge end of the conveying unit moves between the stacking table, so that the positive electrode sheets and the negative electrode sheets are alternately stacked on the stacking table in a preset posture.

Further, the conveying unit has a circular track, and the supporting part is a mover trolley arranged on the circular track in a magnetic levitation manner.

Further, the mover trolley has a base that slides on the circular track, and the base is provided with a plurality of rolling bodies located on both sides of the circular track, and the base is provided through the rolling bodies. on the circular track.

Further, it also includes a posture maintaining unit provided on each of the mechanical arms, and the posture maintaining unit is used to maintain the adsorption part in a preset posture when the mechanical arm rotates.

Further, each of the adsorption parts is rotated on the corresponding mechanical arm via a rotating shaft, and the posture maintaining unit includes a first pulley fixed on each of the rotating shafts, and is fixed on the two mechanical arms. a second pulley opposite to the first pulley, and a timing belt wound on each of the first pulley and the second pulley;

Due to the rotation of the two mechanical arms, the synchronous belt and the first pulley rotate, so that the adsorption part rotates relative to the mechanical arms and maintains the preset posture.

Further, each of the mechanical arms is rotatably provided with an adsorption plate with an adsorption cavity formed inside, and the adsorption cavity is connected to the external negative pressure part;

The adsorption part is a plurality of suction cups arranged on the adsorption plate and communicating with the adsorption cavity.

Further, the lamination table is a UVW alignment lamination table.

Further, it also includes a pole piece visual inspection unit arranged at the discharge end of the conveying unit;

The visual detection unit is used to collect image information of the positive electrode sheet or the negative electrode sheet on the supporting part.

Further, one end of the two mechanical arms is fixedly connected, and each of the adsorption parts is arranged at the free end of the mechanical arm, and the pole piece stacking device also includes a rotary drive for driving the two mechanical arms to rotate. department.

Further, each of the mechanical arms is provided with a linear drive part, and the power output end of the linear drive part is connected to the corresponding adsorption part, so as to drive the adsorption part to move along the height direction.

Compared with the prior art, the utility model has the following advantages:

The pole piece stacking device described in the utility model conveys the positive pole piece and the negative pole piece to the stacking platform respectively through the supporting parts in the two conveying units, and the two mechanical arms in the manipulator can carry out the positive pole piece and the negative pole piece respectively. Adsorption and movement can alternately stack positive and negative electrodes in a preset posture on the stacking table, which is beneficial to improving the beat of the stacking of the poles and further improving the stacking efficiency of the poles.

In addition, the mover trolley is set on the circular track in the form of magnetic levitation, which is conducive to improving the conveying speed and accuracy of the positive and negative pole pieces, thereby improving the transport cycle of the pole pieces and improving the stacking efficiency. Through the rolling body on the base, it is beneficial to reduce the friction force of the mover trolley in sliding, thereby further improving the conveying efficiency of the mover trolley. By arranging the posture maintaining unit, it is beneficial to ensure that the adsorption part is maintained at a preset posture, thereby improving the efficiency of adsorption and transfer of the pole pieces, and improving the lamination accuracy of the pole pieces.

In addition, the structures of the first pulley, the second pulley and the synchronous belt are simple, convenient for arrangement and implementation, and have a good holding effect on the adsorption part. The adsorption plate and the suction cup have a simple structure, are convenient for arrangement and implementation, and have a good adsorption effect on the positive electrode sheet and the negative electrode sheet. The UVW alignment stacking table is beneficial to improve the posture of the positive and negative electrodes, and to improve the accuracy of the lamination. The attitude of the positive electrode sheet and the negative electrode sheet on the supporting part is facilitated to be recognized by the electrode sheet visual detection unit. The arrangement of the rotation driving part facilitates driving the rotation of the other mechanical arm, thereby facilitating switching the position of the adsorption part. By arranging the linear drive part, it is beneficial to change the height of the adsorption part, thereby improving the adsorption and transfer effect on the positive electrode sheet or the negative electrode sheet.

Description of drawings

The accompanying drawings constituting a part of the utility model are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model, and do not constitute improper limitations to the utility model. In the attached picture:

Fig. 1 is a schematic structural view of the pole piece stacking device described in the embodiment of the present invention;

Fig. 2 is a schematic structural view of the conveying unit described in the embodiment of the present invention;

Fig. 3 is a schematic structural diagram of the manipulator described in the embodiment of the present invention.

Explanation of reference signs:

1. Ring track; 101. Ring maglev line body; 103. Mover trolley; 1031. Base;

2. Positive pole piece; 3. Pole piece visual inspection unit; 4. Negative pole piece; 5. Lamination table;

6, the first mechanical arm; 601, the first timing belt; 602, the second positive pulley; 603, the first pulley; 7, the second mechanical arm; 701, the second timing belt; 702, the second negative pulley ; 8. Adsorption board.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

In the description of the present utility model, it should be noted that if there are terms such as "upper", "lower", "inner", "back", etc. indicating orientation or positional relationship, it is based on the orientation or position shown in the drawings. The relationship is only for the convenience of describing the utility model and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the utility model. In addition, if terms such as "first" and "second" appear, they are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

This embodiment relates to a pole piece stacking device. In terms of overall structure, the pole piece stacking device includes a stacking table 5 , conveying units arranged on two opposite sides of the stacking table 5 , and a manipulator. Wherein, each conveying unit has a plurality of supporting parts that are slidably arranged, and the supporting parts on one of the conveying units are used for supporting and conveying the positive electrode sheet 2 to the stacking table 5, and the supporting parts on the other unit are used for For supporting and transporting the negative electrode sheet 4 to the stacking platform 5 , the two opposite sides of the positive electrode sheet 2 or the negative electrode sheet 4 are compounded with separators.

In this embodiment, the manipulator has two relatively fixed mechanical arms, and each mechanical arm is rotatably provided with an adsorption part for absorbing the pole pieces. Because the two mechanical arms are driven to reciprocate, the two adsorption parts are alternately driven by the delivery unit. The material end moves between the stacking platform 5 so that the positive electrode sheet 2 and the negative electrode sheet 4 are alternately stacked on the stacking platform 5 in a preset posture.

Based on the above overall introduction, an exemplary structure of the pole piece stacking device described in this embodiment is shown in Figure 1 and Figure 2, the conveying unit in this embodiment has a circular track 1, the above-mentioned supporting part It is the mover trolley 103 arranged on the circular track 1 in a magnetic levitation manner. Here, the mover trolley 103 moves by means of magnetic levitation, which is conducive to improving the conveying speed and precision, thereby improving the conveying cycle of the pole pieces, and further improving the stacking efficiency. As shown in Figure 2, the circular track 1 has a horizontal section extending along the length direction and arranged in parallel up and down, and a circular arc section connected between the two ends of the horizontal section shown in the beam, through two horizontal sections and two The connection of the circular arc segments constitutes the circular track 1 .

The conveying unit in this embodiment also includes a ring-shaped magnetic levitation line body 101 arranged on the ring track 1 , so that each mover trolley 103 can reciprocate and slide on the ring track 1 in a magnetic levitation manner. In this embodiment, the principle of the annular magnetic levitation wire body 101 driving each mover trolley 103 to move in a magnetic levitation manner on the circular track 1 can refer to the prior art, and will not be repeated here.

The mover trolley 103 in this embodiment has a support platform for supporting the pole pieces, the mover trolley 103 has a base 1031 which is slidably arranged on the circular track 1, and the base 1031 is provided with multiple holes located on both sides of the circular track 1. The base 1031 is provided on the circular track 1 via the rolling bodies. The arrangement of multiple rolling bodies in this embodiment is beneficial to reduce the frictional force between the base 1031 and the circular track 1 , thereby improving the stability of the mover trolley 103 during movement.

In this embodiment, the mover trolley 103 on the two conveying units moves in the direction indicated by the arrow in FIG. 1 , so as to convey the positive electrode sheet 2 and the negative electrode sheet 4 to the stacking table 5 . The manipulator is arranged corresponding to one side of the stacking table 5 so as to grab the positive electrode sheet 2 and the negative electrode sheet 4 and transfer them to the stacking table 5 . As a preferred embodiment, both surfaces of the negative electrode sheet 4 are compounded with separators, which is beneficial to improve the efficiency of stacking. Of course, in actual implementation, the solution that the two surfaces of the positive electrode sheet 2 are composited with a separator is also feasible.

As shown in FIG. 1 and FIG. 3 , the two mechanical arms in this embodiment are arranged at an angle, and the ends of the two arms away from the stacking platform 5 intersect and are fixedly connected. With respect to the fixedly connected ends of the two mechanical arms, the other ends of both are provided with the above-mentioned adsorption part. The pole piece stacking device in this embodiment further includes a rotary driving part for driving the two mechanical arms to rotate. During specific implementation, the rotary driving part here can adopt the motor in the prior art, and the power output end of this motor is connected with the fixed end of two mechanical arms, to drive the two mechanical arms to be the center of circle with the fixed end of the two mechanical arms turn.

Each mechanical arm is rotatably provided with an adsorption plate 8 with an adsorption cavity formed inside. The adsorption cavity is connected to the external negative pressure part. The adsorption part is a plurality of suction cups arranged on the adsorption plate 8 and communicated with the adsorption cavity. The adsorption plate 8 here has a simple structure and is convenient for layout and implementation. The suction cup adopts silica gel suction cup to reduce damage to the pole piece while having a good adsorption effect. During specific implementation, the vacuum pump in the prior art can be used for the negative pressure part, which communicates with the adsorption chamber through a pipeline.

Each adsorption plate 8 in this embodiment is rectangular, which is suitable for the shape of the positive electrode sheet 2 and the negative electrode sheet 4. The length direction of the pallet extends. In order to improve the grasping and transfer effect of the adsorption plate 8, the adsorption plate 8 needs to maintain a preset posture, that is, the posture consistent with the direction of the pole piece is always maintained during the process of grasping and transferring, and the adsorption plate 8 is in the process of rotating with the mechanical arm. This posture is also always maintained in the middle, so as to ensure that the positive electrode sheet 2 and the negative electrode sheet 4 on the mover trolley 103 are placed on the stacking platform 5 in a consistent posture, which is beneficial to improving the stacking efficiency and effect.

The pole piece stacking device in this embodiment further includes a posture maintaining unit provided on each mechanical arm, and the posture maintaining unit is used to maintain the adsorption part in a preset posture when the robotic arm rotates. As preferably, each adsorption part is installed on the corresponding mechanical arm through the rotation of the rotating shaft, and the posture maintaining unit includes the first pulley 603 fixed on each rotating shaft, and the first pulley 603 opposite to the first pulley 603 is fixed on the two mechanical arms. The second pulley is provided, and the timing belt is wound on each of the first pulley 603 and the second pulley. Due to the rotation of the two mechanical arms, the synchronous belt and the first pulley 603 rotate, so that the adsorption part rotates relative to the mechanical arms and maintains a preset posture. Wherein, the distances between the two rotation shafts and the rotation axes of the two mechanical arms are equal.

For ease of description, as shown in FIG. 3 , in this embodiment, the mechanical arm on the left for grabbing the positive electrode sheet 2 is called the first robotic arm 6 , and the one on the right for grabbing the negative electrode is called the first robotic arm 6 . The robot arm of sheet 4 is called the second robot arm 7 . Wherein, the first pulley 603 is arranged at the fixedly connected ends of the first mechanical arm 6 and the second mechanical arm 7 , and the axial direction of the first pulley 603 is parallel to the thickness direction of the first mechanical arm 6 . The second pulley on the rotating shaft of the adsorption plate 8 on the first mechanical arm 6 is called the second positive pulley 602, and the second pulley on the rotating shaft of the adsorption plate 8 on the second mechanical arm 7 is called The second negative pulley 702 . The synchronous belt wound between the first pulley 603 and the second positive pulley 602 is called the first synchronous belt 601, and the synchronous belt wound between the first pulley 603 and the second negative pulley 702 It is called the second timing belt 701 .

When the rotating driving part drives the first mechanical arm 6 and the second mechanical arm 7 to rotate, the first synchronous belt 601 rotates and drives the second positive pulley 602 to rotate, and the second synchronous belt 701 rotates and drives the second negative pulley 702 to rotate , so that the two adsorption plates 8 can both rotate relative to the corresponding mechanical arms, and then maintain a preset posture. The structure of the pulley and the synchronous belt in this embodiment is simple, easy to arrange and implement, and the transmission effect is good. As shown in Figure 3, the angle θ of the reciprocating rotation of the first mechanical arm 6 and the second mechanical arm 7 in this embodiment can be set according to the use requirements,

In addition, each mechanical arm is provided with a linear drive part, and the power output end of the linear drive part is connected with the corresponding adsorption part, so as to drive the adsorption part to move along the height direction. Specifically, the free ends of the first mechanical arm 6 and the second mechanical arm 7 are provided with the above-mentioned linear drive part, and the power output end of the linear drive part is connected with the adsorption plate 8 to drive the adsorption plate 8 along the mechanical arm. The thickness direction moves, so that the pole piece can be transferred at different heights. The linear drive part here can be a cylinder, which has a simple structure, is convenient to arrange and implement on the mechanical arm, and has a good driving effect.

As a preferred embodiment, the pole piece stacking equipment in this embodiment also includes a pole piece visual detection unit 3 arranged at the discharge end of the conveying unit, and the pole piece visual detection unit 3 is used to collect the positive pole on the supporting part. The image information of sheet 2 or the negative electrode sheet 4. As shown in Fig. 1, the pole piece visual inspection unit 3 in the present embodiment comprises the CCD camera for collecting the pole piece end image, and light source, and this light source can illuminate the end of pole piece, thereby facilitates CCD camera to collect pole piece The precision of image information. The image information collected by the CCD camera can be sent to the image processing system, and the image information can be recognized by the image processing system, so as to confirm the difference between the actual state of the pole piece and the target state, so as to facilitate the adjustment of the position of the pole piece, so that The pole pieces are stacked on the stacking platform 5 in a preset posture.

The stacking table 5 in this embodiment is a UVW alignment stacking table 5, which can change its own posture, thereby correcting the posture of the pole piece based on the information obtained by the image processing system, and then making the pole piece take a preset posture Stacked on the lamination table 5. Here, the UVW alignment lamination table 5 can be a mature product in the prior art, and its own adjustment methods on the three coordinates can refer to the prior art, and will not be repeated here.

When the pole piece stacking device described in this embodiment is in use, the movable trolley 103 on the two conveying units transports the positive pole piece 2 and the negative pole piece 4 sequentially. At the material end, the first mechanical arm 6 and the second mechanical arm 7 rotate synchronously, and the adsorption plate 8 on the first mechanical arm 6 absorbs the positive electrode sheet 2 through a plurality of suction cups. At this time, the adsorption plate 8 on the second mechanical arm 7 Located at stacking table 5. Then the first mechanical arm 6 and the second mechanical arm 7 reversely rotate until the adsorption plate 8 on the second mechanical arm 7 arrives at the discharge end of the conveying unit for transporting the negative electrode sheet 4, at this moment on the second mechanical arm 7 The suction cup on the first mechanical arm 6 grabs the negative electrode sheet 4, and at the same time, the suction cup on the first mechanical arm 6 moves the positive electrode sheet 2 to the stacking table 5. During the whole process, the cylinder adjusts the position of the adsorption plate 8 according to the height required by the suction cup, the first mechanical arm 6 and the second mechanical arm 7 rotate back and forth, and the adsorption plate 8 on the first mechanical arm 6 and the second mechanical arm 7 The suction part on the top alternately reciprocates between the lamination table 5 and the discharge end of the conveying unit.

The pole piece stacking device described in this embodiment transports the positive pole piece 2 and the negative pole piece 4 to the stacking table 5 respectively through the supporting parts in the two conveying units, and the two mechanical arms in the manipulator can align the positive pole piece 2 and the negative pole piece 4. The negative electrode sheet 4 is adsorbed and moved respectively, and the positive electrode sheet 2 and the negative electrode sheet 4 can be alternately stacked on the stacking platform 5 in a preset posture, thereby improving the beat of the electrode sheet stacking and further improving the stacking of the electrode sheet. chip efficiency.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (10)

1. A pole piece stacking device, characterized in that: It includes a lamination table, conveying units arranged on two opposite sides of the lamination table, and a manipulator; Each of the conveying units has a plurality of supporting parts that are slidably arranged, and the supporting parts on one of the conveying units are used to support and transport the positive electrode sheet to the stacking table, and the supporting parts on the other conveying unit The supporting part is used to support and transport the negative electrode sheet to the stacking table, and the positive electrode sheet or the two opposite sides of the negative electrode sheet are compounded with a separator; The manipulator has two relatively fixed mechanical arms, and each of the mechanical arms is rotatably provided with an adsorption part for absorbing the pole pieces. Because the two mechanical arms are driven to rotate back and forth, the two adsorption parts are alternately moved by the two mechanical arms. The discharge end of the conveying unit moves between the stacking table, so that the positive electrode sheets and the negative electrode sheets are alternately stacked on the stacking table in a preset posture. 2. The pole piece lamination device according to claim 1, characterized in that: The conveying unit has a circular track, and the supporting part is a mover trolley arranged on the circular track in a magnetic levitation manner. 3. The pole piece lamination device according to claim 2, characterized in that: The mover trolley has a base that slides on the circular track, and the base is provided with a plurality of rolling bodies located on both sides of the circular track, and the base is set on the circular track via the rolling bodies. on the circular track. 4. The pole piece lamination device according to claim 1, characterized in that: It also includes a posture maintaining unit provided on each of the mechanical arms, and the posture maintaining unit is used to maintain the adsorption part in a preset posture when the mechanical arm rotates. 5. The pole piece lamination device according to claim 4, characterized in that: Each of the adsorption parts is rotated on the corresponding mechanical arm via a rotating shaft, and the posture maintaining unit includes a first pulley fixed on each of the rotating shafts. A second pulley opposite to the first pulley, and a timing belt wound on each of the first pulley and the second pulley; Due to the rotation of the two mechanical arms, the synchronous belt and the first pulley rotate, so that the adsorption part rotates relative to the mechanical arms and maintains the preset posture. 6. The pole piece lamination device according to claim 1, characterized in that: An adsorption plate with an adsorption chamber formed inside is rotated on each of the mechanical arms, and the adsorption chamber is connected to the external negative pressure part; The adsorption part is a plurality of suction cups arranged on the adsorption plate and communicating with the adsorption cavity. 7. The pole piece lamination device according to claim 1, characterized in that: The lamination table is a UVW alignment lamination table. 8. The pole piece lamination device according to claim 1, characterized in that: It also includes a pole piece visual inspection unit arranged at the discharge end of the conveying unit; The visual detection unit is used to collect image information of the positive electrode sheet or the negative electrode sheet on the supporting part. 9. The pole piece lamination device according to claim 1, characterized in that: One end of the two mechanical arms is fixedly connected, each of the adsorption parts is provided at the free end of the mechanical arm, and the pole piece stacking device further includes a rotary driving part for driving the two mechanical arms to rotate. 10. The pole piece lamination device according to any one of claims 1 to 9, characterized in that: Each mechanical arm is provided with a linear drive part, and the power output end of the linear drive part is connected with the corresponding adsorption part, so as to drive the adsorption part to move along the height direction.

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