CN210092252U - A lithium-ion battery high-speed stacking device and lithium-ion battery - Google Patents

Abstract

The utility model relates to the technical field of battery manufacturing, and specifically discloses a high-speed stacking device for lithium ion batteries and a lithium ion battery, wherein the high-speed stacking device for lithium ion batteries comprises a stacking platform, a diaphragm drive shaft and a cutting device, and the diaphragm drive shaft A diaphragm roll is installed on it, one end of the diaphragm on the diaphragm roll is connected to the lamination platform, the lamination platform or the diaphragm drive shaft can move linearly in the horizontal direction, the diaphragm can be stacked on the lamination platform in a "Z" shape, and the cutting device is set Above the lamination platform, it is used for cutting the cell blank assemblies stacked and formed on the lamination platform to separate a plurality of independent cell blanks. By setting the lamination platform and the diaphragm drive shaft, the diaphragm can be automatically stacked in a "Z" shape. With the operation of arranging multiple pole pieces at intervals on each layer of the diaphragm, the lamination speed can be greatly improved and the repeated grabbing of the pole pieces can be reduced. The motion of the film reduces the positioning time.

Description

A lithium-ion battery high-speed stacking device and lithium-ion battery

technical field

The utility model relates to the technical field of battery manufacturing, in particular to a high-speed stacking device for lithium ion batteries and a lithium ion battery.

Background technique

At present, lithium-ion batteries are widely used in consumer electronic products, new energy vehicles and energy storage fields. With the rapid development of the application market and the continuous improvement of user requirements for products, how to produce products with good safety performance, high specific energy and cycle life? Long and low-cost lithium-ion batteries have become an important research direction in the field of lithium-ion batteries.

Lithium-ion batteries can be divided into two types according to their production methods: wound type and laminated type. The winding type battery has fast processing speed and high efficiency, but it has the following defects: 1. The winding type battery has certain requirements on the flexibility of the pole piece, resulting in a low surface density of the pole piece, and the energy density of the single battery is restricted; 2. . The reaction of the wound battery at the bending point of the pole piece is different from that of other positions, and the electrode reaction uniformity is poor, which affects the performance and even poses a safety hazard; 3. In order to make the negative electrode completely wrap the positive electrode, the negative electrode piece has some invalid areas. No capacity is provided, reducing the energy density of the battery. In contrast, the electrode reaction uniformity of the laminated battery is better and safer, and the pole pieces can be coated thicker, so that the energy density of the battery can be improved.

At present, the lamination methods of laminated batteries mainly include the following:

1. Z-type lamination, which is formed by stacking the positive and negative plates and diaphragms that have been die-cut in Z-type from bottom to top. This process is simple, but there are problems of slow lamination speed and low efficiency, which prolongs production. cycle, increasing production costs;

2. Bag-type lamination, the positive and negative plates that have been die-cut in advance are packaged in diaphragm bags, and then stacked alternately to form a stack, but the process is complicated, and diaphragm bags need to be made, resulting in low production efficiency;

3. H-type lamination, the process is similar to Z-type lamination, except that the positive and negative plates have tabs on both sides or the positive and negative plates have two tabs on one side of the telecom. This process can effectively solve the problem of stacking. Too many layers cause the problem of too thick the tab weld area, but the lamination speed is still low.

Utility model content

One object of the embodiments of the present invention is to provide a high-speed stacking device for lithium ion batteries, which has a simple structure, can effectively simplify the stacking process, and improve production efficiency. Another object of the embodiments of the present invention is to provide a lithium ion battery.

For this purpose, the embodiment of the present utility model adopts the following technical solutions:

In a first aspect, a high-speed stacking device for lithium ion batteries is provided, including a stacking platform, a diaphragm drive shaft and a cutting device, a diaphragm roll is installed on the diaphragm drive shaft, and one end of the diaphragm on the The lamination platform or the diaphragm drive shaft can move linearly along the horizontal direction, the diaphragm can be stacked on the lamination platform in a "Z" shape, and the cutting device is arranged on the lamination platform. Above the chip platform, it is used for cutting the cell blank assemblies stacked and formed on the lamination platform to separate a plurality of independent cell blanks.

As a preferred solution of the high-speed stacking device for lithium ion batteries, a sliding guide is provided below the stacking platform, the stacking platform is slidably arranged on the sliding guide, and one side of the stacking platform is provided with a sliding guide. A first driving mechanism for driving the lamination platform to reciprocate in the horizontal direction.

As a preferred solution of the high-speed stacking device for lithium ion batteries, two limit blocks are arranged on the sliding guide rail at intervals, and the stacking platform is arranged between the two limit blocks.

As a preferred solution of the lithium-ion battery high-speed stacking device, a first sensor is provided on the side of the limit block close to the stacking platform, the first sensor is connected to a controller, and the controller is connected to the The first drive mechanism is connected.

As a preferred solution of the high-speed stacking device for lithium ion batteries, the diaphragm drive shaft is mounted on a support, and the diaphragm drive shaft is driven by a second drive mechanism to move on the support in a horizontal direction.

As a preferred solution of the lithium-ion battery high-speed stacking device, the bracket includes a mounting plate and two beams parallel to each other, a sliding rail is arranged above the beam, and the mounting plate is slidably arranged on the sliding rail, so Both ends of the diaphragm transmission shaft are suspended on the mounting plate by means of suspensions, the second driving mechanism is arranged on the beam and connected to the mounting plate, and the second driving mechanism is connected to the controller.

As a preferred solution of the high-speed stacking device for lithium ion batteries, two fixing fixtures are arranged on the stacking platform at intervals, and the fixing fixtures are used to press the stacked diaphragms on the stacking platform, The two fixing clips are respectively disposed at both ends of the diaphragm along the stacking direction of the diaphragm.

As a preferred solution of the high-speed stacking device for lithium-ion batteries, the fixing fixture includes a fixing seat, and a first pressing plate is rotatably connected to the fixing seat through a rotating shaft, and the first pressing plate is fixedly connected with the rotating shaft. The rotating shaft is connected with the rotating shaft driving member so as to be driven to rotate around the axis of the rotating shaft by the rotating shaft driving member, a second pressing plate is arranged on one side of the first pressing plate, and the first pressing plate and the second pressing plate pass through The elastic member is connected, and the side of the second pressing plate away from the first pressing plate can abut with the diaphragm.

As a preferred solution of the lithium-ion battery high-speed stacking device, a second sensor is provided on the fixing base, the second sensor is a distance sensor, the distance sensor is connected to the controller, and the distance sensor is used for detecting The position of the diaphragm during stacking.

In a second aspect, a lithium-ion battery is provided, which is manufactured and formed by using the lithium-ion battery high-speed stacking device.

The beneficial effects of the embodiment of the present invention are: by setting the lamination platform and the diaphragm drive shaft, the diaphragm can be automatically stacked in a "Z" shape, and with the operation of arranging a plurality of pole pieces at intervals on each layer of the diaphragm, the diaphragm can be greatly Increase the lamination speed, reduce the repetitive action of grabbing the pole pieces, and reduce the positioning time; by setting the cutting device, the cell blank assembly can be divided into multiple independent cell blanks, and at least two cells can be completed at one time. Production of blanks.

Description of drawings

The utility model will be described in further detail below according to the accompanying drawings and embodiments.

FIG. 1 is a schematic structural diagram of a high-speed stacking device for lithium ion batteries according to an embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a fixing fixture according to an embodiment of the present invention.

FIG. 3 is a schematic diagram of the assembly of the stent and the diaphragm roll according to the embodiment of the present invention.

In the picture:

1. Pole piece; 2. Lamination platform; 3. Diaphragm roll; 31. Diaphragm; 4. Cutting device; 5. Diaphragm drive shaft; 6. Sliding guide rail; 73, the first pressure plate; 74, the second pressure plate; 75, the spring; 76, the second sensor; 8, the bracket; 81, the beam; 82, the mounting plate;

Detailed ways

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only Some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present invention.

In the description of the present invention, unless otherwise expressly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or a fixed 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 an internal connection between two elements or an interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include the first and second features in direct contact, or may include the first and second features The features are not in direct contact but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

In the following embodiments, both ends of the separator in the stacking direction refer to both ends in the direction of arrows in FIG. 1 .

As shown in FIG. 1 , an embodiment of the present invention provides a high-speed stacking method for lithium ion batteries, which includes the following steps:

Step S100, providing the die-cut pole piece 1 and the lamination platform 2, so that one end of the diaphragm 31 on the diaphragm roll 3 located above the lamination platform 2 is fixed on the lamination platform 2;

Step S200 , stacking the membranes 31 on the lamination platform 2 in a "Z" shape, and placing at least two membranes of the same polarity above the membranes 31 at intervals for each layer of the membranes 31 . For the pole piece 1, the polarities of the two adjacent layers of the pole piece 1 are different, and after stacking the N layers of the diaphragm 31, a cell blank assembly is formed;

In step S300, the cutting device 4 cuts the cell blank assembly at a position between the adjacent pole pieces 1 to form a single cell blank. By stacking at least two pole pieces 1 in each layer, the repeated action of grabbing the pole pieces 1 can be reduced, the positioning time can be reduced, the stacking of at least two cell blanks can be completed at one time, and the lamination speed can be accelerated. It does not affect the process before and after the production of lithium-ion batteries, it is easy to replace the traditional process, and the cost is low.

Specifically, in the embodiment of the present invention, the diaphragm 31 is a continuous and unbroken structure, and the diaphragm and the pole piece 1 can be stacked without being cut into a diaphragm structure in advance, which reduces the difficulty of operation.

In one embodiment, when the diaphragms 31 are stacked on the lamination platform 2, the diaphragm drive shaft 5 supporting the diaphragm roll 3 is fixed, and the lamination platform 2 can reciprocate linearly in the horizontal direction to The diaphragms 31 on the diaphragm roll 3 are pulled to stack in a "Z" shape. By setting the lamination platform 2 to a structure that can move back and forth in a straight line, during the movement of the lamination platform 2, the diaphragm roll 3 can be automatically pulled to rotate to realize unwinding, and the diaphragm 31 after the unwinding of the diaphragm roll 3 can be set according to the setting method. Stacked on lamination platform 2.

In this embodiment, the lamination platform 2 is slidably arranged on a sliding guide rail 6, and the lamination platform 2 is driven to move on the sliding guide rail 6 by a first driving mechanism (not shown in the figure). By arranging the sliding guide rails 6, the lamination platform 2 can be moved more smoothly, and the first driving mechanism can realize automatic driving, realize the automatic operation of stacking the diaphragms 31, and reduce the difficulty of operation.

Further, the first driving mechanism is an electric cylinder with a screw rod structure. In other embodiments, the first drive mechanism is an air cylinder.

In other embodiments, when the diaphragms 31 are stacked on the lamination platform 2, the lamination platform 2 is fixed, and the diaphragm drive shaft 5 supporting the diaphragm roll 3 can reciprocate linearly along the horizontal direction to The membranes 31 on the membrane roll 3 are stacked on the lamination platform 2 in a "Z" shape. By setting the diaphragm drive shaft 5 supporting the diaphragm roll 3 as a movable structure, under the restriction of the fixed lamination platform 2, the diaphragm 31 can also be stacked on the lamination platform 2 in a specified manner, reducing the difficulty of operation.

In addition, the placement of the pole piece 1 can be automatically fed by a manipulator (not shown in the figure) controlled by the controller (not shown in the figure) to ensure that the pole piece 1 can be placed on the diaphragm 31 quickly and accurately.

In an embodiment, a fixing fixture 7 is provided. During the stacking process of the diaphragms 31 , the fixing fixtures 7 fix both ends of the diaphragm 31 along the stacking direction. When the diaphragms 31 are stacked to the pressure of the fixing fixture 7 In the tight position, the fixing clamp 7 is opened to avoid the diaphragm 31 so that the diaphragm 31 can be stacked to the pressing position of the fixing clamp 7 . By arranging the fixing fixture 7, the diaphragm 31 can be prevented from moving relative to the lamination platform 2 during the stacking process, thereby ensuring that the pole pieces 1 arranged between the diaphragms 31 can be fixed in position without displacement, thereby ensuring that the subsequent cutting device 4 minutes The position of the pole piece 1 in the cut-to-shape cell body does not shift, which improves the yield of the product.

Further, in step S300, the cutting device 4 cuts the intermediate position between the two adjacent pole pieces 1, so that the shapes of the single cell blanks after cutting are consistent, and the probability of repairing the cell blanks is reduced.

In addition, in step S300, before the cutting device 4 cuts the cell blank assembly, the portion of the membrane 31 whose edge position is folded is cut first. This design can make the cutting of the cell blank assembly more neat.

In one embodiment, step S210 is set between steps S200 and S300, and a hot pressing device (not shown in the figure) is used to compress the cell blank assembly, so that the diaphragm 31 and the pole piece 1 are tightly attached. The tightly fitted cell blank assembly ensures a smooth cutting process.

In one embodiment, in the step S300, the cutting device 4 can be moved along the horizontal and vertical directions to the position where the cell blank assembly is to be cut. When three or more pole pieces 1 are arranged on each layer of diaphragm 31, the cutting position is not fixed, so the cutting device 4 can be set to move in the horizontal direction to adjust the cutting position, and the cutting device 4 can Moving vertically, this design enables the cutting operation, and the cutting device 4 can be moved to other positions that do not obstruct the stacking of membranes 31 when not required.

The embodiment of the present invention also provides a high-speed stacking device for lithium ion batteries, which includes a stacking platform 2, a diaphragm drive shaft 5 and a cutting device 4. A diaphragm roll 3 is mounted on the diaphragm drive shaft 5, and the diaphragm roll 3 One end of the upper diaphragm 31 is connected to the lamination platform 2, the lamination platform 2 or the diaphragm transmission shaft 5 can move linearly in the horizontal direction, and the diaphragm 31 can be stacked on the lamination in a "Z" shape. On the lamination platform 2, the cutting device 4 is arranged above the lamination platform 2, and is used to cut the cell blank assemblies stacked and formed on the lamination platform 2 to separate a plurality of independent cells green body. By setting the lamination platform 2 and the diaphragm drive shaft 5, the diaphragm 31 can be automatically stacked in a "Z" shape, and with the operation of arranging a plurality of pole pieces 1 at intervals on each layer of the diaphragm 31, the lamination speed can be greatly improved. The action of repeatedly grabbing the pole piece 1 is reduced, and the positioning time is reduced; by setting the cutting device 4, the cell blank assembly can be divided into a plurality of independent cell blanks, and the cutting of at least two cell blanks can be completed at one time. make.

In one embodiment, a sliding guide 6 is provided below the lamination platform 2, the lamination platform 2 is slidably arranged on the sliding guide 6, and one side of the lamination platform 2 is provided with a drive to drive the lamination. The first driving mechanism for the reciprocating movement of the sheet platform 2 in the horizontal direction.

Preferably, two limit blocks (not shown in the figure) are arranged on the sliding guide rail 6 at intervals, and the lamination platform 2 is arranged between the two limit blocks. By setting the limit block, the position of the horizontal movement of the lamination platform 2 can be restricted, the lamination platform 2 can be prevented from being separated from the sliding guide rail 6 , and the operation of stacking the diaphragms 31 can be carried out smoothly.

More preferably, a first sensor is provided on one side of the limiting block close to the lamination platform 2 , the first sensor is connected to a controller, and the controller is connected to the first driving mechanism. By setting the controller, automatic operation can be realized; by setting the first sensor, the position of the stacking platform 2 can be detected by the sensor, so that the controller controls the first driving mechanism to drive the stacking platform 2 to move in a specified direction.

More preferably, two mutually parallel sliding guide rails 6 are arranged below the lamination platform 2 . This design can make the movement of the lamination platform 2 smoother, and the surface level of the lamination platform 2 is higher.

In an embodiment, as shown in FIG. 3 , the diaphragm transmission shaft 5 is mounted on a bracket 8 , and the diaphragm transmission shaft 5 is driven by a second driving mechanism to move on the bracket 8 in a horizontal direction. The movement of the diaphragm drive shaft 5 also enables the diaphragms 31 to be stacked on the lamination platform 2 in a designated "Z" shape.

Preferably, the bracket 8 includes a mounting plate 82 and two cross beams 81 parallel to each other, a slide rail is arranged above the cross beam 81, the mounting plate 82 is slidably arranged on the slide rail, and the diaphragm drive shaft 5 Both ends are suspended on the mounting plate 82 by means of suspension members 83 , the second driving mechanism is disposed on the beam 81 and connected with the mounting plate 82 , and the second driving mechanism is connected with the controller. In other embodiments, the diaphragm drive shaft 5 can also choose other structures to move horizontally relative to the support 8. For example, the support 8 includes a plate parallel to the horizontal direction, and a horizontal chute is provided on the plate to move the diaphragm drive shaft 5 horizontally. The two ends are inserted in two horizontal chute, and the movement of the diaphragm transmission shaft 5 is realized by the second driving mechanism.

In one embodiment, referring to FIGS. 1 and 2 , two fixing fixtures 7 are arranged on the lamination platform 2 at intervals, and the fixing fixtures 7 are used to press the stacked diaphragms 31 on the lamination platform 2 . In the above, the two fixing clamps 7 are respectively disposed at both ends of the diaphragm 31 along the stacking direction of the diaphragm 31 .

Preferably, the fixing fixture 7 includes a fixing seat 71 , and a first pressing plate 73 is rotatably connected to the fixing seat 71 through a rotating shaft 72 , the first pressing plate 73 is fixedly connected with the rotating shaft 72 , and the rotating shaft 72 is connected with the rotating shaft. The driving member is connected to rotate around the axis of the shaft 72 through the driving member of the shaft. The second pressing plate 74 is connected to the diaphragm 31 on the side away from the first pressing plate 73 by elastic members. By arranging an elastic member to connect the two pressing plates, when the combined structure of the first pressing plate 73, the second pressing plate 74 and the elastic member is rotated to the position where it needs to abut the diaphragm 31 under the action of the rotating shaft 72, due to the elastic driving of the elastic member, the The second pressure plate 74 will always abut on the upper surface of the diaphragm 31 .

In this embodiment, the elastic member is a spring 75 . At least three springs 75 are arranged between the first pressure plate 73 and the second pressure plate 74 , and the three springs 75 are distributed between the first pressure plate 73 and the second pressure plate 74 in a triangular manner. Of course, in other embodiments, the structure of the fixing fixture 7 is not limited to the structure in which the pressure plate and the spring 75 cooperate with the above-mentioned embodiment, and can also be other structures, such as a pressure plate structure pushed by a cylinder, as long as the diaphragm 31 can be compressed, and It only needs to be able to avoid when the diaphragm 31 is stacked to the position of the fixing jig 7 .

Preferably, the shaft driving member is connected to the controller. The controller controls the shaft drive, which can realize automatic control.

Further, the fixing base 71 is provided with a second sensor 76, the second sensor 76 is a distance sensor, the distance sensor is connected with the controller, and the distance sensor is used to detect the diaphragm 31 during the folding process When it is detected that the distance between the diaphragm 31 and the second sensor 76 decreases during the folding process, the rotating shaft driving member at the corresponding position drives the rotating shaft to rotate, and the rotating shaft drives the first pressing plate 73 and the second pressing plate 74 to rotate to the avoidance position, so that The diaphragm 31 can be stacked at the position where the fixture 7 is fixed smoothly. When the distance sensor detects that the distance between the diaphragm 31 and the second sensor 76 increases, the rotating shaft drives the first pressing plate 73 and the second pressing plate 74 to rotate again until they are pressed tightly. The position of the diaphragm 31 .

In one embodiment, the cutting device 4 includes a cutting frame and a cutter movably arranged on the cutting frame, the cutter is mounted on the cutting frame through a moving mechanism, and the moving mechanism includes a connected X-axis movement Mechanism and Z-axis moving mechanism, the X-axis moving mechanism is fixed on the cutting frame, and the cutter is fixed on the Z-axis moving mechanism.

In the description herein, it should be understood that the terms "upper", "lower", "right", etc. are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of description and simplified operation, Rather than indicating or implying that the indicated device or element must have a particular orientation, be constructed and operate in a particular orientation, it should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

In the description of this specification, reference to the description of the terms "an embodiment", "example" etc. means that a particular feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

The technical principle of the present invention has been described above with reference to the specific embodiments. These descriptions are only for explaining the principle of the present invention, and should not be construed as limiting the protection scope of the present invention in any way. Based on the explanations herein, those skilled in the art can think of other specific embodiments of the present invention without creative efforts, and these methods will all fall within the protection scope of the present invention.

Claims (10)

1. The utility model provides a high-speed lamination device of lithium ion battery, its characterized in that, includes lamination platform, diaphragm transmission shaft and cutting device, install the diaphragm on the diaphragm transmission shaft and roll up, diaphragm one end that the diaphragm was rolled up with the lamination platform is connected, the lamination platform or horizontal direction rectilinear movement can be followed to the diaphragm transmission shaft, the diaphragm can be "Z" style of calligraphy pile up in on the lamination platform, cutting device set up in the top of lamination platform, be used for right it cuts in order to separate a plurality of independent electric core blanks to stack fashioned electric core blank subassembly on the lamination platform.

2. The lithium ion battery high-speed lamination device according to claim 1, wherein a sliding guide rail is arranged below the lamination platform, the lamination platform is slidably arranged on the sliding guide rail, and a first driving mechanism for driving the lamination platform to reciprocate in the horizontal direction is arranged on one side of the lamination platform.

3. The lithium ion battery high-speed lamination device according to claim 2, wherein two limit blocks are arranged on the sliding guide rail at intervals, and the lamination platform is arranged between the two limit blocks.

4. The lithium ion battery high-speed lamination device according to claim 3, wherein a first sensor is arranged on one side of the limiting block close to the lamination platform, the first sensor is connected with a controller, and the controller is connected with the first driving mechanism.

5. The lithium ion battery high-speed lamination device according to claim 1, wherein the diaphragm transmission shaft is mounted on a support, and the diaphragm transmission shaft is driven by a second driving mechanism to move on the support along a horizontal direction.

6. The lithium ion battery high-speed lamination device according to claim 5, wherein the bracket comprises a mounting plate and two cross beams parallel to each other, a slide rail is disposed above the cross beam, the mounting plate is slidably disposed on the slide rail, two ends of the diaphragm transmission shaft are suspended on the mounting plate through suspension members, the second driving mechanism is disposed on the cross beam and connected with the mounting plate, and the second driving mechanism is connected with the controller.

7. The lithium ion battery high-speed lamination device according to any one of claims 1 to 6, wherein two fixing clamps are arranged on the lamination platform at intervals, the fixing clamps are used for pressing the stacked diaphragm on the lamination platform, and the two fixing clamps are respectively arranged at two ends of the diaphragm along the stacking direction of the diaphragm.

8. The high-speed lithium ion battery lamination device according to claim 7, wherein the fixing clamp comprises a fixing seat, a first pressing plate is rotatably connected to the fixing seat through a rotating shaft, the first pressing plate is fixedly connected to the rotating shaft, the rotating shaft is connected to a rotating shaft driving member so as to be driven by the rotating shaft driving member to rotate around the axis of the rotating shaft, a second pressing plate is arranged on one side of the first pressing plate, the first pressing plate is connected to the second pressing plate through an elastic member, and one side of the second pressing plate, which is far away from the first pressing plate, can be abutted to the diaphragm.

9. The lithium ion battery high-speed lamination device according to claim 8, wherein a second sensor is arranged on the fixed seat, the second sensor is a distance sensor, the distance sensor is connected with a controller, and the distance sensor is used for detecting the position of the diaphragm in the stacking process.

10. A lithium ion battery, characterized in that, the lithium ion battery high-speed lamination device according to any one of claims 1 to 9 is used for manufacturing and molding.

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