A lamination device and a laminator

Abstract

The present invention provides a laminating device and a laminator, belonging to the technical field of lithium battery manufacturing equipment, including: a deviation rectifying mechanism, provided with two and arranged along a first direction, and a pole piece unit or a composite unit is adapted to be placed on the deviation rectifying mechanism; a stacking table mechanism, provided with two, and the two stacking table mechanisms are respectively arranged on both sides of the deviation rectifying mechanism along the first direction, and the two stacking table mechanisms are arranged in a staggered manner to respectively correspond to the two deviation rectifying mechanisms, and each stacking table mechanism can be switched between the two deviation rectifying mechanisms; a feeding mechanism, provided with two, and the two feeding mechanisms are respectively arranged corresponding to the two deviation rectifying mechanisms, and the feeding mechanism is movably arranged between the deviation rectifying mechanism and the stacking table mechanism. The laminating device provided by the present invention realizes simultaneous lamination of the two stacking table mechanisms by providing a set of deviation rectifying mechanism, and two feeding mechanisms are provided to meet the feeding of the two stacking table mechanisms. The feeding mechanism has a short stroke, low energy consumption and high feeding efficiency. Therefore, the laminating device has a high laminating efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery manufacturing equipment, and particularly relates to a laminating device and a laminator. Background Art

[0002] The laminating technology is one of the lithium-ion battery manufacturing technologies. The speed and accuracy of the laminating technology directly determine the production capacity of the lithium-ion production line and the manufacturing cost of the battery cells. During the preparation process of the battery cells, the positive and negative electrode sheets need to be alternately laminated, and at the same time, a separator is required between the positive and negative electrode sheets to isolate the electrode sheets. Most of the existing laminating devices adopt a laminating table with a set of positive and negative electrode alignment structures. The positive and negative electrode alignment structures are distributed on both sides of the laminating table. The electrode sheets are transported from the positive and negative electrode sheet production lines to the positive and negative electrode alignment structures for alignment by the linear reciprocating motion of the manipulator above, and finally transported to the laminating table for lamination. During the lamination process, the movement stroke of the manipulator is large. Therefore, in order to shorten the handling time, a multi-mover linear motor is generally used for handling, resulting in high energy consumption and difficulty in improving the lamination efficiency. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defects of high energy consumption and low lamination efficiency in the existing laminating devices, so as to provide a laminating device and a laminator.

[0004] To solve the above problems, the present invention provides a laminating device, including: two alignment mechanisms arranged along a first direction, and a pole piece unit or a composite unit is adapted to be placed on the alignment mechanism; two stacking table mechanisms are arranged, and the two stacking table mechanisms are respectively arranged on both sides of the alignment mechanism along the first direction. The two stacking table mechanisms are arranged in a staggered manner to respectively correspond to the two alignment mechanisms, and each stacking table mechanism can be switched between the two alignment mechanisms; a feeding mechanism is arranged corresponding to the alignment mechanism and can be switched between the alignment mechanism and the corresponding stacking table mechanism.

[0005] Optionally, two feeding mechanisms are arranged, and the two feeding mechanisms are respectively arranged corresponding to the two alignment mechanisms. Each feeding mechanism is movably arranged between the alignment mechanism and the stacking table mechanism.

[0006] Optionally, each feeding mechanism includes two material taking structures arranged along a second direction perpendicular to the first direction, and the two material taking structures are adapted to reciprocate along the second direction.

[0007] Optionally, the feeding mechanism further includes a lifting structure, and the lifting structure is adapted to drive the two material taking structures to move synchronously in the vertical direction.

[0008] Optionally, the laminating device further includes a swing feeding mechanism. There are two swing feeding mechanisms, and the two swing feeding mechanisms are arranged corresponding to the two stacking mechanisms. The swing feeding mechanism can drive the composite tape to reciprocate in the first direction, and the polar plate units are adapted to be placed on both of the deviation rectifying mechanisms.

[0009] Optionally, each deviation rectifying mechanism includes a deviation rectifying table, and a number of deviation rectifying positions are arranged along the first direction on the deviation rectifying table; each stacking mechanism includes a stacking table, and each stacking table can be switched between the two deviation rectifying tables along the first direction. A number of stacking positions are arranged along the first direction on each stacking table, and the number of deviation rectifying positions and the number of stacking positions are correspondingly arranged; the material taking structure is adapted to simultaneously transfer the polar plate units or composite units at a number of the deviation rectifying positions to a number of the stacking positions.

[0010] Optionally, each deviation rectifying mechanism includes a number of deviation rectifying tables, and the number of deviation rectifying tables are arranged along the first direction. Each stacking mechanism includes a number of stacking tables, and the number of stacking tables are arranged corresponding to the number of deviation rectifying tables. The material taking structure is adapted to simultaneously transfer the polar plate units or composite units on a number of the deviation rectifying tables to a number of the stacking tables.

[0011] Optionally, the laminating device further includes a driving mechanism. There are two driving mechanisms, and the two driving mechanisms are respectively arranged corresponding to the two stacking mechanisms. The driving mechanism is adapted to drive the stacking mechanism to reciprocate in the first direction.

[0012] Optionally, the material taking structure is an adsorption structure.

[0013] The present invention also provides a laminator, including the above laminating device.

[0014] Optionally, the laminator further includes a thermal composite mechanism, and the thermal composite mechanism is adapted to thermally composite the separator and the polar plate unit to form a composite tape.

[0015] Optionally, the laminator further includes a cutting mechanism, and the cutting mechanism is arranged downstream of the thermal composite mechanism. The cutting mechanism is adapted to cut the composite tape to form composite units.

[0016] Optionally, the laminator further includes a transfer mechanism, and the transfer mechanism is adapted to feed the polar plate units or composite units to the deviation rectifying mechanism.

[0017] The present invention has the following advantages:

[0018] 1. A lamination device provided by the present invention has two lamination table mechanisms arranged in a staggered manner and capable of performing position conversion between two rectification mechanisms. The two lamination table mechanisms can respectively obtain pole piece units or composite units from the two rectification mechanisms in an interleaved manner. Therefore, by setting up a set of rectification mechanisms, simultaneous lamination of the two lamination table mechanisms is achieved, and a feeding mechanism is set up to meet the feeding requirements of the two lamination table mechanisms. The feeding mechanism has a short stroke, low energy consumption, and high feeding efficiency. Therefore, the lamination efficiency of the lamination device is high.

[0019] 2. A lamination device provided by the present invention is such that when one material taking structure takes material from the rectification mechanism and transports it to the lamination table mechanism, another material taking structure can synchronously move to the rectification mechanism to take material. After the two lamination table mechanisms move in an interleaved manner, another material taking structure can transport the pole piece unit or composite unit to another lamination table mechanism. Therefore, by setting up two material taking structures, lamination and material taking can be carried out synchronously, the feeding mechanism has no idle stroke, energy consumption is reduced, and feeding efficiency is improved.

[0020] 3. A lamination device provided by the present invention realizes Z-shaped lamination of the composite tape and the pole piece unit by setting up a swinging feeding mechanism to unwind the composite tape and arranging pole piece units with the same polarity on the two rectification mechanisms, with the polarity of the composite tape being opposite to that of the pole piece unit. Moreover, the composite tape is directly used for lamination, and simultaneous lamination of the pole piece and the separator can be achieved in one swinging feeding process, improving the lamination efficiency.

[0021] 4. A lamination device provided by the present invention can simultaneously laminate several battery cells on one lamination table in one lamination process, that is, produce several battery cells simultaneously, by setting several rectification positions on one rectification table and several lamination positions on one lamination table, thus improving the production efficiency.

[0022] 5. A lamination device provided by the present invention can meet the requirement of simultaneously laminating several battery cells, that is, produce several battery cells simultaneously, by setting both the rectification table and the lamination table as several, thus improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 Fig. shows the overall structural schematic diagram of the lamination device provided by the embodiment of the present invention;

[0025] Figure 2 The structural schematic diagram of the lamination device provided by the embodiment of the present invention when in the first state is shown;

[0026] Figure 3 The structural schematic diagram of the lamination device provided by the embodiment of the present invention when in the second state is shown;

[0027] Figure 4 The structural schematic diagram of the thermal composite mechanism provided by the embodiment of the present invention is shown;

[0028] Figure 5 The structural schematic diagram of the thermal composite mechanism and the cutting mechanism provided by the embodiment of the present invention is shown;

[0029] Figure 6 The structural schematic diagram of the pole piece unit manufacturing mechanism provided by the embodiment of the present invention is shown.

[0030] Explanation of reference numerals:

[0031] 10, deviation rectifying mechanism; 11, deviation rectifying table; 20, stacking table mechanism; 21, lamination table; 30, feeding mechanism; 31, material taking structure; 40, thermal composite mechanism; 41, first pole piece winding and unwinding structure; 42, first pole ear manufacturing structure; 43, first pole piece cutting structure; 44, separator unwinding structure; 45, thermal composite structure; 50, cutting mechanism; 60, pole piece unit manufacturing mechanism; 61, second pole piece winding and unwinding structure; 62, second pole ear manufacturing structure; 63, second pole piece cutting structure; 64, pole piece unit conveying structure. Detailed implementation manners

[0032] Next, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0036] Embodiment 1

[0037] As Figures 1 to 3 shown, a specific embodiment of the lamination device includes: a deviation rectifying mechanism 10, a lamination table mechanism 20, and a feeding mechanism 30. There are two deviation rectifying mechanisms 10, and the two deviation rectifying mechanisms 10 are arranged along a first direction. A pole piece unit or a composite unit can be placed on the deviation rectifying mechanism 10. There are two lamination table mechanisms 20, and the two lamination table mechanisms 20 are respectively arranged on both sides of the deviation rectifying mechanism 10 along the first direction, and the two lamination table mechanisms 20 are arranged in a staggered manner to correspond to the two deviation rectifying mechanisms 10 respectively. Each lamination table mechanism 20 can be switched between the two deviation rectifying mechanisms 10, that is, each lamination table mechanism 20 can reciprocate along the first direction. There are two feeding mechanisms 30, and the two feeding mechanisms 30 respectively correspond to the two deviation rectifying mechanisms 10. The feeding mechanism 30 is movably arranged between the deviation rectifying mechanism 10 and the lamination table mechanism 20.

[0038] It is worth noting that when using a composite tape (double-layer diaphragm) to unwind and cooperate with the pole piece unit for lamination, pole piece units with the same polarity can be arranged on the two deviation rectifying mechanisms 10, and the pole piece units on the deviation rectifying mechanism 10 have opposite polarity to the composite tape; or, the composite tape (double-layer diaphragm) is cut into composite units and then cooperated with the pole piece units for lamination. At this time, a pole piece unit is arranged on one deviation rectifying mechanism 10, and a composite unit is arranged on the other deviation rectifying mechanism 10, and the pole piece unit and the composite unit have opposite polarity; or, the positive composite tape (single-layer diaphragm) is cut into positive composite units, the negative composite tape (single-layer diaphragm) is cut into negative composite units, and the positive composite units (single-layer diaphragm) and the negative composite units (single-layer diaphragm) are respectively arranged on the two deviation rectifying mechanisms 10 for lamination.

[0039] In this embodiment, as Figure 2 and Figure 3 shown, the feeding mechanism 30 moves along a second direction, the second direction is perpendicular to the first direction, and the two feeding mechanisms 30 move in opposite directions.

[0040] It should be noted that, please refer to Figure 2 and Figure 3 , the above-mentioned first direction refers to the left-right direction in the figure, and the above-mentioned second direction is the up-down direction in the figure. The two stacking mechanisms 20 are respectively located on the upper side and the lower side of the straight line where the two rectifying mechanisms 10 are located. As Figure 2 shown, when the stacking mechanism 20 on the upper side is correspondingly arranged with the rectifying mechanism 10 on the left side, the stacking mechanism 20 on the lower side is correspondingly arranged with the rectifying mechanism 10 on the right side. As Figure 3 shown, when the stacking mechanism 20 on the upper side is correspondingly arranged with the rectifying mechanism 10 on the right side, the stacking mechanism 20 on the lower side is correspondingly arranged with the rectifying mechanism 10 on the left side. Please refer to Figure 2 and Figure 3 , when the feeding mechanism 30 on the left side moves downward, the feeding mechanism 30 on the right side moves upward.

[0041] The two stacking mechanisms 20 are arranged in a staggered manner and can perform position conversion between the two rectifying mechanisms 10. The two stacking mechanisms 20 can alternately obtain the pole piece units or composite units from the two rectifying mechanisms 10 respectively. Therefore, by setting a set of rectifying mechanisms 10, simultaneous lamination of the two stacking mechanisms 20 is realized, and two feeding mechanisms 30 are set to meet the feeding of the two stacking mechanisms 20. The feeding mechanism 30 has a short stroke, low energy consumption, and high feeding efficiency. Therefore, the lamination efficiency of the lamination device is high.

[0042] In this embodiment, as Figures 1 to 3 shown, each feeding mechanism 30 includes two material taking structures 31. The two material taking structures 31 are arranged along the second direction, and the two material taking structures 31 can reciprocate along the second direction. Specifically, please refer to Figure 2 and Figure 3 , taking the feeding mechanism 30 on the left side as an example for illustration. As Figure 2 shown, when the upper material taking structure 31 corresponds to the upper stacking mechanism 20 for lamination, the lower material taking structure 31 takes materials on the rectifying mechanism 10. After the upper material taking structure 31 finishes lamination, the two stacking mechanisms 20 are Figure 2 position-converted to Figure 3 position. At the same time, the feeding mechanism 30 moves along the second direction, so that the lower material taking structure 31 moves to correspond to the lower stacking mechanism 20 for lamination, and the upper material taking structure 31 takes materials on the rectifying mechanism 10.

[0043] When a material taking structure 31 takes materials from the deviation rectifying mechanism 10 and transfers them to the stacking table mechanism 20, another material taking structure 31 can move synchronously to the deviation rectifying mechanism 10 to take materials. So after the two stacking table mechanisms 20 move alternately, the other material taking structure 31 can transfer the pole piece unit or composite unit to the other stacking table mechanism 20. Therefore, by setting two material taking structures 31, lamination and material taking can be carried out synchronously, there is no idle stroke in the feeding mechanism 30, energy consumption is reduced, and the feeding efficiency is improved.

[0044] In this embodiment, the feeding mechanism 30 is a manipulator, and the material taking structure 31 is an adsorption structure, that is, two adsorption structures are arranged on one manipulator.

[0045] Of course, only one material taking structure 31 can also be arranged on each feeding mechanism 30. After the material taking structure 31 takes materials on the deviation rectifying mechanism 10, it moves to the corresponding stacking table mechanism 20 for lamination, then returns to the deviation rectifying mechanism 10 to take materials again, and then moves to the other stacking table mechanism 20 for lamination.

[0046] In this embodiment, the feeding mechanism 30 further includes a lifting structure, and the lifting structure can drive the two material taking structures 31 to move synchronously in the vertical direction. By setting the lifting structure, after the two material taking structures 31 are higher than the deviation rectifying mechanism 10 and the stacking table mechanism 20 in the vertical direction, they move along the second direction, avoiding interference between the material taking structure 31 and the deviation rectifying mechanism 10 and the stacking table mechanism 20.

[0047] It should be noted that only one feeding mechanism 30 can also be provided. The feeding mechanism 30 includes two material taking manipulators arranged at intervals along the first direction. Each manipulator includes two adsorption parts arranged at intervals along the second direction. Each material taking manipulator can reciprocate along the second direction, and the two material taking manipulators move in opposite directions. Setting the feeding mechanism 30 as an integral structure facilitates the synchronous lifting of the two material taking manipulators, and the two material taking manipulators can move independently along the second direction to complete material taking and feeding.

[0048] In this embodiment, the lamination device further includes a driving mechanism. There are two driving mechanisms, and the two driving mechanisms are respectively arranged corresponding to the two stacking table mechanisms 20. The driving mechanism can drive the corresponding stacking table mechanism 20 to reciprocate along the first direction.

[0049] In this embodiment, the driving mechanism is a combination of a motor and a lead screw.

[0050] Of course, the driving mechanism can also be other linear driving structures, such as a linear motor, etc.

[0051] In this embodiment, as Figures 1 to 3As shown, each rectifying mechanism 10 includes a rectifying table 11, and a rectifying position is provided on each rectifying table 11. Each stacking mechanism 20 includes a stacking table 21, and a stacking position is provided on each stacking table 21. Each material taking structure 31 takes a pole piece unit or a composite unit from the rectifying position each time and places it at the stacking position. Therefore, two stacking tables 21 can simultaneously stack two battery cores.

[0052] In this embodiment, a pushing portion is provided on the rectifying table 11, and the pushing portion can push the pole piece unit or the composite unit in different directions to move the pole piece unit and the composite unit to a predetermined position.

[0053] It should be noted that in other alternative embodiments, each rectifying mechanism 10 includes a rectifying table 11, and a plurality of rectifying positions are arranged along the first direction on the rectifying table 11. Each stacking mechanism 20 includes a stacking table 21, and each stacking table 21 switches between two rectifying tables 11 along the first direction. A plurality of stacking positions are arranged along the first direction on each stacking table 21. The plurality of rectifying positions and the plurality of stacking positions are correspondingly arranged. The material taking structure 31 can simultaneously transfer the pole piece units or the composite units at the plurality of rectifying positions to the plurality of stacking positions. Or, each rectifying mechanism 10 includes a plurality of rectifying tables 11, and a rectifying position is provided on each rectifying table 11. The plurality of rectifying tables 11 are arranged along the first direction. Each stacking mechanism 20 includes a plurality of stacking tables 21, and a stacking position is provided on each stacking table 21. The plurality of stacking tables 21 and the plurality of rectifying tables 11 are correspondingly arranged. The material taking structure 31 can simultaneously transfer the pole piece units or the composite units on the plurality of rectifying tables 11 to the plurality of stacking tables 21. Therefore, through the above two methods, in one stacking process, on one stacking mechanism 20, a plurality of battery cores can be stacked simultaneously, that is, a plurality of battery cores can be produced simultaneously, improving the production efficiency.

[0054] It should be further noted that if one rectifying mechanism 10 includes n rectifying positions and one stacking mechanism 20 includes n stacking positions, then one stacking mechanism 20 can stack n battery cores simultaneously. Then, because the stacking device includes two stacking mechanisms 20, the stacking device can stack 2n battery cores simultaneously.

[0055] When using the stacking device of this embodiment to stack the pole piece unit and the composite unit, the pole piece unit is a positive pole piece unit, and the composite unit is a negative composite unit. Please refer to Figure 2 and Figure 3, a positive electrode sheet unit is arranged on the deviation rectifying table 11 on the left side, and a negative electrode composite unit is arranged on the deviation rectifying table 11 on the right side. The picking structure 31 located above the left feeding mechanism 30 is called the "upper left picking structure 31", the picking structure 31 located below the left feeding mechanism 30 is called the "lower left picking structure 31", the picking structure 31 located above the right feeding mechanism 30 is called the "upper right picking structure 31", and the picking structure 31 located below the right feeding mechanism 30 is called the "lower right picking structure 31". The specific process is as follows:

[0056] Step (1): Taking the position shown in Figure 2 as the initial position of the stacking table 21. When stacking for the first time on the two stacking tables 21, the lower left picking structure 31 does not pick up the positive electrode sheet unit, and the upper right picking structure 31 picks up the negative electrode composite unit. The two stacking tables 21 and the two feeding mechanisms 30 are converted from the position in Figure 2 to the position in Figure 3 . The upper right picking structure 31 places the negative electrode composite unit on the upper stacking table 21, and no positive electrode sheet unit is placed on the lower stacking table 21 (of course, no negative electrode composite unit is placed either);

[0057] Step (2): When in the state shown in Figure 3 , the upper left picking structure 31 picks up the positive electrode sheet unit, and the lower right picking structure 31 picks up the negative electrode composite unit. The two stacking tables 21 and the two feeding mechanisms 30 are converted from the position in Figure 3 to the position in Figure 2 . The upper left picking structure 31 places the positive electrode sheet unit on the upper stacking table 21 (there is already a negative electrode composite unit on this stacking table 21), and the lower right picking structure 31 places the negative electrode composite unit on the lower stacking table 21 (this is the first time stacking on this stacking table 21);

[0058] Step (3): After that, when in the state shown in Figure 2 , the lower left picking structure 31 picks up the positive electrode sheet unit, and the upper right picking structure 31 picks up the negative electrode composite unit. The two stacking tables 21 and the two feeding mechanisms 30 are converted from the position in Figure 2 to the position in Figure 3 . The lower left picking structure 31 places the positive electrode sheet unit on the lower stacking table 21, and the upper right picking structure 31 places the negative electrode composite unit on the upper stacking table 21; Repeat this step to complete the stacking.

[0059] Embodiment 2

[0060] Embodiment 2 is different from Embodiment 1 in that, in Embodiment 2, the lamination device further includes a swing feeding mechanism. There are two swing feeding mechanisms, and the two swing feeding mechanisms are arranged corresponding to the two lamination table mechanisms 20. By setting the swing feeding mechanism to unwind the composite tape, and by arranging pole piece units with the same polarity on the two deviation rectifying mechanisms 10, and the polarity of the composite tape is opposite to that of the pole piece unit. Therefore, the Z-shaped lamination of the composite tape and the pole piece unit is realized, and the composite tape is directly used for lamination, and the simultaneous lamination of the pole piece and the separator can be realized during one swing feeding process, improving the lamination efficiency.

[0061] Specifically describe the setting situation of the swing feeding mechanism according to the number of lamination tables 21 included in the lamination table mechanism 20 and the number of lamination positions arranged on the lamination table 21:

[0062] When each lamination table mechanism 20 includes one lamination table 21, each swing feeding mechanism includes one swing feeding component, and one swing feeding component is arranged corresponding to one lamination table 21. And, regardless of whether there is one lamination position or multiple lamination positions arranged on the lamination table 21, only one swing feeding component can be used to feed one lamination position or multiple lamination positions.

[0063] When each lamination table mechanism 20 includes multiple lamination tables 21, each swing feeding mechanism includes multiple swing feeding components, and the multiple swing feeding components are arranged in one-to-one correspondence with the multiple lamination tables 21. And, regardless of whether there is one lamination position or multiple lamination positions arranged on each lamination table 21, only one swing feeding component can be used to feed one lamination position or multiple lamination positions on one lamination table 21.

[0064] That is to say, the number of swing feeding components included in each swing feeding mechanism is set corresponding to the number of lamination tables 21 included in each lamination table mechanism 20.

[0065] When using the lamination device of this embodiment to laminate the pole piece unit and the composite tape, the pole piece unit is a positive pole piece unit, and the composite tape is a negative composite tape. Please refer to Figure 2 and Figure 3 , positive pole piece units are arranged on the two deviation rectifying tables 11 on the left and right sides, and two swing feeding mechanisms are used to feed the negative composite tapes to the two lamination tables 21 respectively. The picking structure 31 located above the left feeding mechanism 30 is called the "upper left picking structure 31", the picking structure 31 located below the left feeding mechanism 30 is called the "lower left picking structure 31", the picking structure 31 located above the right feeding mechanism 30 is called the "upper right picking structure 31", and the picking structure 31 located below the right feeding mechanism 30 is called the "lower right picking structure 31". The specific process is as follows:

[0066] Step (1): Take the position shown in Figure 2 as the initial position of the lamination table 21. At this time, the left-lower material taking structure 31 sucks the positive electrode sheet unit on the left deviation correcting table 11, and the upper-right material taking structure 31 sucks the positive electrode sheet unit on the right deviation correcting table 11;

[0067] Step (2): The two lamination tables 21 and the two feeding mechanisms 30 are converted from the position shown in Figure 2 to the position shown in Figure 3 . And during the position conversion process, both of the two swing feeding mechanisms feed materials, laying the negative composite tape on the two lamination tables 21. The left-lower material taking structure 31 places the positive electrode sheet unit on the lower lamination table 21, the upper-right material taking structure 31 places the positive electrode sheet unit on the upper lamination table 21, the upper-left material taking structure 31 sucks the positive electrode sheet unit on the left deviation correcting table 11, and the lower-right material taking structure 31 sucks the positive electrode sheet unit on the right deviation correcting table 11;

[0068] Step (3): The two lamination tables 21 and the two feeding mechanisms 30 are converted from the position shown in Figure 3 to the position shown in Figure 2 . And during the position conversion process, both of the two swing feeding mechanisms feed materials again, laying the negative composite tape on the two lamination tables 21. The upper-left material taking structure 31 places the positive electrode sheet unit on the upper lamination table 21, the lower-right material taking structure 31 places the positive electrode sheet unit on the lower lamination table 21, the left-lower material taking structure 31 sucks the positive electrode sheet unit on the left deviation correcting table 11, and the upper-right material taking structure 31 sucks the positive electrode sheet unit on the right deviation correcting table 11;

[0069] Step (4): Repeat the above steps to complete lamination.

[0070] It should be noted that during the process of manufacturing the battery cell by lamination, it is usually necessary to stack the negative electrode sheets first. Therefore, in Embodiment 1, the negative composite units are first placed on both of the two lamination tables 21. In Embodiment 2, the negative composite tapes are first laid on both of the two lamination tables 21; and the last lamination also needs to be a negative electrode sheet.

[0071] It should be further noted that if the lamination device of Embodiment 2 is used to laminate the positive composite tape and the negative electrode sheet unit, the negative electrode sheet units need to be first placed on both of the two lamination tables 21, and then the positive composite tape and the negative electrode sheet unit are stacked upwards in sequence, cycling in sequence. And the last lamination should also be a negative electrode sheet unit. Therefore, after lamination is completed, a single separator sheet needs to be stacked on the outside of the negative electrode sheet units located at the lowermost layer and the uppermost layer respectively to meet the requirements of the battery cell structure design.

[0072] Embodiment 3

[0073] This embodiment provides a specific implementation of a laminator, including the laminating device of Embodiment 1 or Embodiment 2.

[0074] In this embodiment, the laminator further includes a transfer mechanism, which conveys the electrode sheet unit or the composite unit to the deviation rectifying mechanism 10. Specifically, the transfer mechanism can be a manipulator.

[0075] In this embodiment, as Figure 4 and Figure 5 shown, the laminator further includes a thermal composite mechanism 40, which can thermally composite the separator and the electrode sheet unit to form a composite tape. Specifically, as Figure 4 and Figure 5 shown, the thermal composite mechanism 40 includes a first electrode sheet winding and unwinding structure 41, a first tab making structure 42, a first electrode sheet cutting structure 43, a separator unwinding structure 44 and a thermal composite structure 45. A pair of separator unwinding structures 44 are arranged at a relative interval to provide a layer of separator on both sides of the electrode sheet unit.

[0076] It should be noted that, as Figure 5 shown, in order to cut the composite tape into composite units, a cutting mechanism 50 is arranged downstream of the thermal composite mechanism 40.

[0077] In this embodiment, as Figure 6 shown, the laminator further includes an electrode sheet unit manufacturing mechanism 60. The electrode sheet unit manufacturing mechanism 60 includes a second electrode sheet winding and unwinding structure 61, a second tab making structure 62, a second electrode sheet cutting structure 63 and an electrode sheet unit conveying structure 64.

[0078] According to the above description, this patent application has the following advantages:

[0079] 1. One set of deviation rectifying mechanism can be equipped with two stacking mechanisms, and the two stacking mechanisms stack sheets simultaneously, the feeding mechanism has a short stroke, and the laminating efficiency is high;

[0080] 2. The feeding mechanism has no idle stroke, and the feeding efficiency is high;

[0081] 3. Using the electrode sheet unit and the composite unit for laminating, or the electrode sheet unit and the composite tape for laminating, improves the laminating efficiency.

[0082] Obviously, the above embodiments are only examples given for clear illustration, and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A lamination device, characterized in that, Including: Two rectifying mechanisms (10) are provided, and the two rectifying mechanisms (10) are arranged along a first direction. The rectifying mechanism (10) is adapted to place a pole piece unit or a composite unit thereon; Two stacking platforms (20) are provided, and the two stacking platforms (20) are respectively arranged on both sides of the rectifying mechanism (10) along the first direction. The two stacking platforms (20) are arranged in a staggered manner to respectively correspond to the two rectifying mechanisms (10), and each stacking platform (20) can linearly reciprocate along the first direction to switch between the two rectifying mechanisms (10); Two feeding mechanisms (30) are provided, and the two feeding mechanisms (30) are correspondingly arranged with the two rectifying mechanisms (10). The feeding mechanism (30) is movably arranged between the rectifying mechanism (10) and the stacking platform (20) along a second direction and can switch between the rectifying mechanism (10) and the corresponding stacking platform (20). Each feeding mechanism (30) includes two material taking structures (31), the two material taking structures (31) are arranged along the second direction, the two material taking structures (31) can linearly reciprocate along the second direction, and the two feeding mechanisms (30) move in opposite directions; Wherein, the second direction is perpendicular to the first direction.

2. The lamination device according to claim 1, wherein The feeding mechanism (30) further includes a lifting structure, and the lifting structure is adapted to drive the two material taking structures (31) to move synchronously in the vertical direction.

3. The lamination device according to any one of claims 1-2, characterized in that, The laminating device further includes two swing feeding mechanisms, and the two swing feeding mechanisms are correspondingly arranged with the two stacking platforms (20). The swing feeding mechanism can drive the composite tape to reciprocate along the first direction, and the two rectifying mechanisms (10) are both adapted to place the pole piece units thereon.

4. The lamination device according to claim 1 or 2, characterized in that, Each rectifying mechanism (10) includes a rectifying table (11), and a plurality of rectifying positions are arranged on the rectifying table (11) along the first direction; each stacking platform (20) includes a laminating table (21), and each laminating table (21) can switch between the two rectifying tables (11) along the first direction. A plurality of laminating positions are arranged on each laminating table (21) along the first direction, and the plurality of rectifying positions and the plurality of laminating positions are correspondingly arranged; the material taking structure (31) is adapted to simultaneously transfer the pole piece units or composite units at the plurality of rectifying positions to the plurality of laminating positions.

5. The lamination device according to claim 1 or 2, characterized in that, Each rectifying mechanism (10) includes a plurality of rectifying tables (11), and the plurality of rectifying tables (11) are arranged along the first direction. Each stacking platform (20) includes a plurality of laminating tables (21), and the plurality of laminating tables (21) are correspondingly arranged with the plurality of rectifying tables (11). The material taking structure (31) is adapted to simultaneously transfer the pole piece units or composite units on the plurality of rectifying tables (11) to the plurality of laminating tables (21).

6. The lamination device according to any one of claims 1-2, characterized in that, The lamination device further includes a driving mechanism. There are two driving mechanisms, and the two driving mechanisms are respectively arranged corresponding to the two stacking table mechanisms (20). The driving mechanism is adapted to drive the stacking table mechanism (20) to reciprocate along the first direction.

7. The lamination device according to claim 1 or 2, characterized in that, The material taking structure (31) is an adsorption structure.

8. A laminator, characterized in that, It includes the lamination device according to any one of claims 1-7.

9. The laminator according to claim 8, characterized in that, The laminator further includes a thermal compounding mechanism (40), and the thermal compounding mechanism (40) is adapted to thermally compound the separator and the electrode sheet unit to form a composite tape.

10. The laminator according to claim 9, characterized in that, The laminator further includes a cutting mechanism (50). The cutting mechanism (50) is arranged downstream of the thermal compounding mechanism (40), and the cutting mechanism (50) is adapted to cut the composite tape to form composite units.

11. The laminator according to claim 8, wherein, The laminator further includes a transfer mechanism, and the transfer mechanism is adapted to load the electrode sheet unit or the composite unit onto the deviation rectifying mechanism (10).

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