CN221102331U - Diaphragm feeding device and lamination machine - Google Patents

Abstract

The application provides a diaphragm feeding device and a lamination machine, wherein the diaphragm feeding device comprises a diaphragm conveying mechanism, a diaphragm cutting mechanism and a diaphragm adsorbing mechanism, wherein the diaphragm feeding device comprises: the diaphragm conveying mechanism is configured to convey the diaphragm, and the diaphragm is conveyed to the stacking platform after passing through the diaphragm adsorbing mechanism and the diaphragm cutting mechanism; after the stacking of the battery cells is completed, the diaphragm adsorption mechanism is configured to adsorb the diaphragm positioned above the diaphragm adsorption mechanism, and the diaphragm cutting mechanism is configured to cut off the diaphragm after the diaphragm adsorption mechanism adsorbs the diaphragm; the membrane suction mechanism is further configured to flip the end of the severed membrane to a stacking platform, which is further configured to secure the end of the membrane. According to the diaphragm feeding device, the reversible diaphragm adsorption mechanism is arranged, after lamination is completed, the diaphragm adsorption mechanism can turn the diaphragm end part separated from the battery cell to the upper part of the stacking platform, so that the stacking platform can receive and fix the diaphragm end part, and the battery cell stacking efficiency is improved.

Description

Diaphragm feeding device and lamination machine

Technical Field

The application relates to the field of battery production, in particular to a diaphragm feeding device and a lamination machine.

Background

The battery cell is generally formed by stacking a positive plate, a negative plate and a diaphragm in a Z-shaped stacking mode, wherein the diaphragm is required to separate the adjacent positive plate and negative plate and cover the outermost plate.

The diaphragm is generally conveyed to the stacking table by a continuous feeding mode of a material roll, after one cell is stacked, the diaphragm needs to be cut off, and the end part of the diaphragm separated from the cell is in a free state and is positioned at the side of the stacking table. To perform stacking of the next cell, the separator end in the free state needs to be grasped and fixed to the stacking table, but the separator end in the free state is difficult to grasp. It is common practice in the industry to blow back the membrane stubs onto the stacking table by means of automatic blowing, the position of the membrane on the stacking table being not precisely guaranteed.

Disclosure of utility model

In order to solve the technical problems, the application provides a diaphragm feeding device, which has the following detailed technical scheme:

The utility model provides a diaphragm material feeding unit, includes diaphragm conveying mechanism, diaphragm shutdown mechanism and diaphragm adsorption mechanism, wherein:

the diaphragm conveying mechanism, the diaphragm adsorbing mechanism and the diaphragm cutting mechanism are sequentially arranged;

The diaphragm conveying mechanism is configured to convey a continuous diaphragm, and the continuous diaphragm is conveyed to the stacking platform after passing through stations where the diaphragm adsorbing mechanism and the diaphragm cutting mechanism are located;

After the stacking of the battery cells is completed, the diaphragm adsorption mechanism is configured to adsorb the diaphragm positioned above the diaphragm adsorption mechanism, and the diaphragm cutting mechanism is configured to cut off the diaphragm after the diaphragm adsorption mechanism adsorbs the diaphragm, and the end part of the cut diaphragm is kept adsorbed on the diaphragm adsorption mechanism;

The membrane suction mechanism is further configured to flip the end of the severed membrane onto a stacking platform, which is further configured to secure the end of the membrane.

According to the diaphragm feeding device provided by the application, the reversible diaphragm adsorption mechanism is arranged, after lamination is completed, the diaphragm adsorption mechanism can automatically turn the diaphragm end part separated from the battery cell to the upper part of the stacking platform, so that the stacking platform can receive and fix the diaphragm end part, and the battery cell stacking efficiency is improved.

In some embodiments, the diaphragm delivery mechanism includes a first mounting bracket, a compression assembly, a lift drive, and a clamp pair roller, the diaphragm passing through the compression assembly and the clamp pair roller in sequence, wherein: the pressing component and the lifting driving piece are respectively arranged on the first mounting bracket; the clamping pair roller is arranged at the movable end of the lifting driving piece, and the lifting driving piece is configured to drive the clamping pair roller to descend before the diaphragm cutting mechanism cuts off the diaphragm, so that the diaphragm between the clamping pair roller and the stacking platform is in a horizontal state and is attached to the adsorption surface of the diaphragm adsorption mechanism; the hold down assembly is configured to clamp the diaphragm when the diaphragm severing mechanism severs the diaphragm.

Before the diaphragm cutting mechanism cuts off the diaphragm, the clamping pair roller is driven downwards through the lifting driving piece to drive the clamping pair roller to press the diaphragm downwards, so that the diaphragm between the clamping pair roller and the stacking platform is pressed to be in a horizontal state, and the diaphragm between the clamping pair roller and the stacking platform can be ensured to be adsorbed and fixed by the adsorption surface of the diaphragm adsorption mechanism. The counter roller is also lowered each time the lamination is made to level the diaphragm, helping to promote lamination quality. By arranging the pressing component, when the diaphragm cutting mechanism cuts off the diaphragm, the diaphragm is clamped, so that the end part of the diaphragm is ensured to be adsorbed on the diaphragm adsorption mechanism, and the diaphragm is prevented from retracting and separating from the diaphragm adsorption mechanism.

In some embodiments, the compression assembly comprises a compression roller, a compression bar and a compression bar driving assembly, wherein the compression roller is fixedly connected to the first mounting bracket, the compression bar driving part is arranged on the first mounting bracket, and the compression bar is connected to the compression bar driving assembly and is parallel to the compression roller; a gap for the diaphragm to pass through is formed between the pressing rod and the pressing roller, and the pressing rod driving assembly is configured to drive the pressing rod to move towards or away from the pressing roller so as to release or press the diaphragm.

A compression assembly of simple structure is provided, and other compression rods are driven by a compression rod driving assembly to move towards or away from compression rollers so as to compress or release a diaphragm.

In some embodiments, the membrane suction mechanism comprises a rotary drive assembly and a suction plate, wherein the rotary drive assembly is configured to drive the suction plate to flip up and down; before the adsorption plate is turned over, the adsorption surface of the adsorption plate faces upwards to adsorb the end part of the cut diaphragm above the adsorption plate; after the adsorption plate is turned over, the adsorption face of the adsorption plate is turned down to turn over the end of the adsorbed cut-off membrane onto the stacking platform.

By arranging the diaphragm adsorption mechanism, the diaphragm adsorption mechanism can adsorb the end parts of the cut diaphragms and automatically turn the end parts of the diaphragms separated from the battery cells to the upper part of the stacking platform.

In some embodiments, the diaphragm severing mechanism includes a cutter drive assembly and a hot cutter, wherein: the cutter driving assembly is arranged on the first mounting bracket, and the hot cutter is connected to the driving end of the cutter driving assembly; the cutter driving assembly is configured to drive the hot cutter to lift so as to drive the hot cutter to avoid or contact the diaphragm, and when the hot cutter contacts the diaphragm, the diaphragm is heated and cut off.

Compared with a mechanical cutter, the cutting machine adopts the hot cutter to cut off the diaphragm, so that the cutting effect on the diaphragm can be improved, and the cutting end is prevented from generating saw teeth.

The application also provides a lamination machine, which comprises a pole piece feeding mechanism, any one of the diaphragm feeding devices, a stacking platform and a battery cell blanking mechanism, wherein: the pole piece feeding mechanism is configured to alternately feed the positive pole piece and the negative pole piece onto the stacking platform; the membrane feeding device is configured to feed the membrane onto the stacking platform; the stacking platform is configured to cooperate with the pole piece feeding mechanism and the diaphragm feeding device to stack the sequentially received positive pole piece, negative pole piece and diaphragm into a battery cell; the battery core blanking mechanism is used for moving the stacked battery cores away from the stacking platform and temporarily storing the stacked battery cores.

Through the cooperation of the pole piece feeding mechanism, the diaphragm feeding device and the stacking platform, the lamination machine automatically stacks the positive pole piece, the negative pole piece and the diaphragm into the battery cell. In particular, after stacking the previous cell, the separator feeding device can automatically turn the separator end separated from the cell over the stacking platform, so that the stacking platform can receive and fix the separator end, and thus, stacking of the next cell can be directly performed. And through setting up electric core unloading mechanism, then realized the automatic unloading to the electric core that stacks.

In some embodiments, the lamination machine further comprises a translation mechanism and a lifting mechanism, the stacking platform being disposed on a movable part of the translation mechanism and in driving connection with the lifting mechanism, wherein: the translation mechanism is configured to drive the stacking platform to move back and forth along the horizontal direction so that the first end and the second end on the stacking platform alternately move to the position below the discharging end of the diaphragm feeding device; when the end of the severed diaphragm is flipped over the stacking platform, the lift mechanism is configured to drive the stacking platform up to receive the end of the diaphragm.

The stacking platform is driven to move back and forth along the horizontal direction through the translation mechanism, so that the diaphragm is stacked on the stacking platform in a Z shape, and alternate coating of the positive plate and the negative plate is implemented. And when the end of the cut diaphragm is turned over to be above the stacking platform by lifting driving of the lifting mechanism, the stacking platform can receive and fix the end of the diaphragm.

In some embodiments, the stacking platform is provided with adsorption holes, and the end parts of the diaphragms are fixed on the stacking platform through adsorption holes.

Through setting up the absorption hole at the stack platform for the stack platform has realized the absorption fixed to the tip of diaphragm.

In some embodiments, the lamination machine further comprises a first hold-down mechanism, a first lifting module, a second lifting module, and a second hold-down mechanism disposed on the movable component of the translation mechanism, wherein: the first pressing mechanism is positioned above the first end of the stacking platform, and the first lifting module is configured to drive the first pressing mechanism to press and release the diaphragm and the pole piece on the stacking platform at the first end; the second hold-down mechanism is located above the second end of the stacking platform, and the second lifting module is configured to drive the second hold-down mechanism to hold down and release the diaphragm and the pole piece on the stacking platform at the second end.

In the stacking process, the diaphragms are stacked on a stacking platform in a Z-shaped track, and after each layer of diaphragms are laid, a pole piece is stacked on the laid diaphragms. In particular, when the diaphragm moves towards the first end of the stacking platform, the second pressing mechanism presses the diaphragm and the pole piece at the second end under the drive of the second lifting module. When the diaphragm moves towards the second end of the stacking platform, the first pressing mechanism presses the diaphragm and the pole piece at the first end under the driving of the first lifting module.

In some embodiments, the first pressing mechanism and the second pressing mechanism have the same structure, the first pressing mechanism comprises a pressing sheet driving assembly, a first pressing sheet and a second pressing sheet, the pressing sheet driving assembly is arranged on a movable part of the first lifting module, and the first pressing sheet and the second pressing sheet are connected to the driving end of the pressing sheet driving assembly in pairs; the pressing sheet driving assembly is used for driving the first pressing sheet and the second pressing sheet to be close to the middle and separate to the two sides so as to approach or avoid the diaphragm and the pole piece on the stacking platform.

Through setting up first hold-down mechanism and second hold-down mechanism for first hold-down mechanism and second hold-down mechanism can implement compressing tightly and dodging the diaphragm and the pole piece of corresponding end.

Drawings

FIG. 1 is a schematic diagram of a diaphragm feeding apparatus according to an embodiment of the present application;

FIG. 2 is a schematic diagram of the structure of a membrane delivery mechanism and a membrane adsorption mechanism in an embodiment of the application;

FIG. 3 is a schematic diagram showing the relative positions of the membrane feeding device and the stacking platform in the stacking process of the battery cells according to an embodiment of the application

FIG. 4 is a schematic view of a diaphragm feeding apparatus according to another embodiment of the present application;

fig. 5 is a schematic structural view of a lamination machine according to an embodiment of the present application at one view angle;

Fig. 6 is a schematic structural view of a lamination machine according to an embodiment of the present application at another view angle;

FIG. 7 is a schematic diagram of a stacking platform according to an embodiment of the present application;

FIG. 8 is a schematic diagram illustrating an assembly of a first pressing mechanism and a first lifting module according to an embodiment of the present application;

fig. 1 to 8 include:

Diaphragm feeding device 1:

diaphragm conveying mechanism 11: the device comprises a first mounting bracket 111, a pressing assembly 112, a lifting driving piece 113, a clamping pair roller 114, a pressing roller 115, a pressing rod 116 and a pressing rod driving group 117;

Diaphragm adsorption mechanism 12: a rotation driving assembly 121, an adsorption plate 122, a second mounting bracket 123;

diaphragm cutting mechanism 13: a cutter driving assembly 131, a hot cutter 132;

A pole piece feeding mechanism 2;

positive plate feeding section 21: a positive electrode sheet frame 211, a positive electrode sheet transfer assembly 212, and a positive electrode sheet carrying assembly 213;

A negative electrode sheet feeding section 22; a negative electrode sheet frame 221, a negative electrode sheet transfer assembly 222, and a negative electrode sheet transport assembly 223;

Stacking platform 3:

A first end 31, a second end 32;

a translation mechanism 4;

The first hold-down mechanism 5: a tablet drive assembly 51, a first tablet 52, a second tablet 53;

a second hold-down mechanism 6;

A first lifting module 7;

And the battery cell blanking mechanism 8.

Detailed Description

In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description.

In order to perform stacking of the next cell, the end of the membrane in a free state needs to be grasped and fixed on the stacking table, but the end of the membrane in the free state is difficult to grasp, currently, the common practice in the industry is to blow back the membrane broken end onto the stacking table by an automatic blowing mode, and the position of the membrane on the stacking table in the mode cannot be accurately ensured.

In order to solve the problems of the prior art in which the blowing moves the diaphragm to break, the utility model provides a diaphragm feeding device, which can automatically turn the end of the diaphragm separated from the battery cell to the upper part of the stacking platform after lamination is completed, so that the stacking platform can receive and fix the end of the diaphragm, thereby improving the stacking efficiency of the battery cell.

As shown in fig. 1 to 3, a diaphragm feeding device 1 in an embodiment of the present application includes a diaphragm conveying mechanism 11, a diaphragm adsorbing mechanism 12, and a diaphragm cutting mechanism 13, wherein:

The diaphragm conveying mechanism 11, the diaphragm adsorbing mechanism 12, and the diaphragm cutting mechanism 13 are provided in this order.

The diaphragm conveying mechanism 11 is configured to convey a continuous diaphragm 100, and the continuous diaphragm 100 is conveyed to the stacking platform 3 after passing through the stations where the diaphragm adsorbing mechanism 12 and the diaphragm cutting mechanism 13 are located.

After the cell stacking is completed, the membrane adsorption mechanism 12 is configured to adsorb the membrane located above the membrane adsorption mechanism 12, and the membrane cutting mechanism 13 is configured to cut the membrane after the membrane adsorption mechanism adsorbs the membrane, and the end of the cut membrane remains adsorbed on the membrane adsorption mechanism 12.

The membrane suction mechanism 12 is further configured to flip the end of the severed membrane onto the stacking platform 3, which is further configured to secure the end of the membrane.

In order to enable those skilled in the art to more clearly understand the detailed technical solution of the membrane feeding device 1 in the embodiment of the present application, an exemplary process of implementing the cell stacking by the membrane feeding device 1 in cooperation with the stacking platform 3 in the embodiment of the present application will be described below with reference to fig. 3.

In the embodiment shown in fig. 3, the membrane feeding device 1 is kept unchanged in position during the stacking process of the cells, and the stacking platform 3 is configured to be capable of moving back and forth in the horizontal direction (such as the X-axis direction in fig. 3) to realize the position switching between the first station a and the second station B, wherein the first end 31 of the stacking platform 3 is located below the membrane feeding device 1 when moving to the first station a; when the stacking platform 3 is moved to the second station B, its second end 32 is located below the membrane feed device 1.

With continued reference to fig. 3, the specific process of implementing the cell stacking by the diaphragm feeding device 1 in cooperation with the stacking platform 3 is as follows:

first, the stacking platform 3 is controlled to move to the first station a, the end of the diaphragm 100 is pulled onto the diaphragm adsorbing mechanism 12, and the upper surface of the diaphragm adsorbing mechanism 12 is controlled to adsorb the end of the diaphragm 100.

Next, the diaphragm adsorbing mechanism 12 is controlled to turn the end of the diaphragm 100 by 180 ° so that the end of the diaphragm 100 faces the stacking platform 3.

Subsequently, the stacking platform 3 is controlled to move toward the membrane suction mechanism 12 until the first end 31 of the stacking platform 3 is located directly below the end of the membrane 100, and then the first end 31 of the stacking platform 3 is controlled to fix the end of the membrane.

Next, the stacking platform 3 is controlled to move to the second station B so that the stacking platform 3 is covered with the first layer of the membrane 100.

The method for starting the cell stacking specifically comprises the following steps:

The negative electrode sheet is placed onto the first layer of separator 100 by the sheet feeding mechanism.

The stacking platform 3 is controlled to move to the first station a so that the second separator 100 covers the negative electrode sheet.

And placing a positive plate on the second layer of diaphragm through the plate feeding mechanism, so that the positive plate and the negative plate are laminated.

The stacking platform 3 is controlled to move to the second station B so that the third separator layer covers the positive electrode sheet.

The above process is repeated until the last negative electrode sheet (i.e., the negative electrode sheet located at the topmost layer) is placed.

The stacking platform 3 is controlled to move to the first station a so that the last separator 100 covers the top-most negative sheet. So far, the current electric core stacking is completed, and as the stacking platform 3 moves back and forth between the first station A and the second station B in the stacking process, the diaphragm is stacked on the stacking platform 3 in a Z shape, and two adjacent negative plates and two adjacent positive plates are spaced.

Finally, the current stacked battery cells and the diaphragm are required to be cut off and separated, and the method is as follows:

The diaphragm adsorbing mechanism 12 is controlled to adsorb the diaphragm located above the diaphragm adsorbing mechanism 12, and then the diaphragm cutting mechanism 13 is controlled to cut the diaphragm, and the end of the cut diaphragm remains adsorbed on the diaphragm adsorbing mechanism 12.

After the currently stacked cells are removed from the stacking platform 3, the membrane suction mechanism 12 is controlled again to turn the end of the membrane 100 by 180 ° so that the end of the membrane 100 faces the stacking platform 3. The first end 31 of the control stack 3 then secures the end of the membrane.

Thus, stacking of the next cell can be started.

Therefore, in the diaphragm feeding device of the embodiment of the application, the reversible diaphragm adsorption mechanism 12 is provided, and after lamination is completed, the diaphragm adsorption mechanism 12 can automatically turn the diaphragm end separated from the battery cell to the upper side of the stacking platform 3, so that the stacking platform 3 can receive and fix the diaphragm end, thereby improving the stacking efficiency of the battery cell.

Of course, in other embodiments, the membrane feeding device 1 may be controlled to move back and forth in the horizontal direction (e.g. the X-axis direction in fig. 3) during the stacking process of the cells, while the stacking platform 3 remains stationary. In this way, the separator can be stacked on the stacking platform 3 in a zigzag shape, so that two adjacent positive electrode plates and negative electrode plates are separated.

With continued reference to fig. 1-3, optionally, the diaphragm conveying mechanism 11 includes a first mounting bracket 111, a pressing assembly 112, a lift drive 113, and a grip counter roller 114, and the diaphragm 100 sequentially passes through the pressing assembly 112 and the grip counter roller 114, wherein: the pressing assembly 112 and the elevation driving member 113 are respectively provided on the first mounting bracket 111. The grip counter roller 114 is mounted on the movable end of the lift driving member 113, and the lift driving member 113 is configured to drive the grip counter roller 114 to descend before the diaphragm cutting mechanism 13 cuts off the diaphragm, so that the diaphragm between the grip counter roller 114 and the stacking platform 3 is in a horizontal state and attached to the suction surface of the diaphragm suction mechanism 12. The hold-down assembly 112 is configured to clamp the diaphragm when the diaphragm severing mechanism 13 severs the diaphragm.

During the stacking process of the battery cells, the counter roller 114 is kept at an avoiding position far away from the diaphragm adsorption mechanism 12, and the diaphragm is conveyed to the stacking platform 3 after passing through the stations where the diaphragm adsorption mechanism 12 and the diaphragm cutting mechanism 13 are located in an inclined state, so that the diaphragm is ensured to be stacked on the stacking platform 3 in a Z shape.

After the stacking of the battery cells is finished, before the diaphragm cutting mechanism 13 cuts off the diaphragm, the clamping pair roller 114 is driven downwards by the lifting driving piece 113, so that the clamping pair roller 114 is driven to press the diaphragm downwards until the diaphragm between the clamping pair roller 114 and the stacking platform 3 is pressed to be in a horizontal state, and the diaphragm between the clamping pair roller 114 and the stacking platform 3 can be ensured to be adsorbed and fixed by the adsorption surface of the diaphragm adsorption mechanism 12.

By providing the pressing unit 112, when the diaphragm cutting mechanism 13 cuts off the diaphragm, the diaphragm is clamped, so that the end of the diaphragm is ensured to be adsorbed on the diaphragm adsorption mechanism 12 after the diaphragm cutting mechanism 13 finishes the cutting action, and the diaphragm is prevented from retracting and separating from the diaphragm adsorption mechanism 12. Of course, when the membrane suction mechanism 12 turns the end of the membrane onto the stacking platform 3, the hold-down assembly 112 releases the membrane.

As shown in fig. 1, optionally, the pressing assembly 112 includes a pressing roller 115, a pressing rod 116, and a pressing rod driving assembly 117, where the pressing roller 115 is fixedly connected to the first mounting bracket 111, the pressing rod driving portion 117 is disposed on the first mounting bracket 111, and the pressing rod 116 is connected to the pressing rod driving assembly 117 and parallel to the pressing roller 115. A gap is formed between the plunger 116 and the pressure roller 115 for the passage of the diaphragm, and a plunger drive assembly 117 is configured to drive the plunger 116 toward or away from the pressure roller 115 to release or compress the diaphragm.

As shown in fig. 1, optionally, the membrane suction mechanism 12 includes a rotary driving assembly 121 and a suction plate 122, wherein the rotary driving assembly 121 is configured to drive the suction plate 122 to flip up and down. As shown in fig. 3, before the adsorption plate 122 is turned over, the adsorption surface of the adsorption plate 122 faces upward to adsorb the end of the cut-off diaphragm located above the adsorption plate 122. After the adsorption plate 122 is turned over, the adsorption surface of the adsorption plate 122 faces downward to turn over the end of the adsorbed cut membrane onto the stacking platform 3.

In the embodiment of fig. 1, the membrane adsorption mechanism 12 further includes a second mounting bracket 123, the second mounting bracket 123 is located below the first mounting bracket 111, the rotation driving assembly 121 is disposed on the second mounting bracket 123, and the adsorption plate 122 is rotatably mounted on the second mounting bracket 123 and is in driving connection with the driving end of the rotation driving assembly 121.

In another embodiment, as shown in fig. 4, the membrane suction mechanism 12 is directly integrated and mounted on the first mounting bracket 111. Specifically, the rotary driving assembly 121 is disposed on the first mounting bracket 111, and the adsorption plate 122 is rotatably mounted on the first mounting bracket 111 and is in driving connection with the driving end of the rotary driving assembly 121.

As shown in fig. 2, the diaphragm cutting mechanism 13 may optionally include a cutter drive assembly 131 and a hot cutter 132, wherein: the cutter driving assembly 131 is disposed on the first mounting bracket 111, and the hot cutter 132 is connected to a driving end of the cutter driving assembly 131. The cutter driving assembly 131 is configured to drive the hot cutter 132 to lift and lower, so as to drive the hot cutter 132 to avoid or contact the diaphragm, and when the hot cutter 132 contacts the diaphragm, the diaphragm is heated and cut off.

Compared with a mechanical cutter, the cutting device adopts the hot cutter to cut off the diaphragm, so that the cutting effect on the diaphragm can be improved, and the end part of the diaphragm is prevented from generating saw teeth.

The application also provides a lamination machine, as shown in fig. 5 to 6, the lamination machine in the embodiment of the application comprises a pole piece feeding mechanism 2, a diaphragm feeding device 1 in any embodiment, a stacking platform 3 and a battery core blanking mechanism 8, wherein: the electrode sheet feeding mechanism 2 is configured to alternately feed the positive electrode sheet and the negative electrode sheet onto the stacking platform 3. The membrane feed device 1 is configured to feed membranes onto the stacking platform 3. The stacking platform 3 is configured to cooperate with the electrode sheet feeding mechanism 2 and the separator feeding device 1 to stack the sequentially received positive electrode sheet, negative electrode sheet and separator into a battery cell. The battery core blanking mechanism 8 is used for moving the stacked battery cores away from the stacking platform and temporarily storing the stacked battery cores.

The lamination machine in the embodiment of the present application may refer to the related description in the foregoing embodiment for the detailed lamination process, which is not repeated here.

Therefore, through the cooperation of the pole piece feeding mechanism 2, the diaphragm feeding device 1 and the stacking platform 3, the lamination machine provided by the embodiment of the application automatically stacks the positive pole piece, the negative pole piece and the diaphragm into the battery core. In particular, after stacking the previous cell, the separator feeding device 1 can automatically turn the separator end separated from the cell over the stacking platform 3, so that the stacking platform 3 can receive and fix the separator end, and thus, stacking the next cell can be directly performed. By arranging the battery cell blanking mechanism 8, automatic blanking of the stacked battery cells is realized.

With continued reference to fig. 1 and 2, the optional pole piece feeding mechanism 2 includes a positive pole piece feeding portion 21 and a negative pole piece feeding portion 22, where the positive pole piece feeding portion 21 is configured to send a positive pole piece to the stacking platform 3, and the negative pole piece feeding portion 22 is configured to send a negative pole piece to the stacking platform 3.

Optionally, the positive plate feeding part 21 includes a positive plate material frame 211, a positive plate transfer assembly 212 and a positive plate carrying assembly 213 that are sequentially arranged, wherein the positive plate material frame 211 is used for storing and supplying a positive plate, the positive plate transfer assembly 212 is used for obtaining a positive plate from the positive plate material frame 211 and transferring the positive plate to a positive plate taking station, and the positive plate carrying assembly 213 is used for picking up a positive plate from the positive plate taking station and delivering the picked positive plate to the stacking platform 3.

Similarly, the negative electrode sheet feeding portion 22 includes a negative electrode sheet frame 221, a negative electrode sheet transferring assembly 222, and a negative electrode sheet carrying assembly 223 that are sequentially disposed, wherein the negative electrode sheet frame 221 is used for storing and supplying an additional electrode sheet, the negative electrode sheet transferring assembly 222 is used for obtaining a negative electrode sheet from the negative electrode sheet frame 221 and transferring the negative electrode sheet to a negative electrode sheet taking station, and the negative electrode sheet carrying assembly 223 is used for picking up the negative electrode sheet from the negative electrode sheet taking station and delivering the picked negative electrode sheet to the stacking platform 3.

As shown in fig. 7, optionally, the lamination machine further includes a translation mechanism 4 and a lifting mechanism (not shown in the drawing), and the stacking platform 3 is disposed on a movable part of the translation mechanism 4 and is in driving connection with the lifting mechanism, wherein: the translation mechanism 4 is configured to drive the stacking platform 3 to move back and forth in a horizontal direction such that the first end 31 and the second end 32 on the stacking platform 3 alternately move below the discharge end of the diaphragm feeding apparatus 1. That is, the stacking platform 3 moves back and forth between the first station a and the second station B under the drive of the translation mechanism 4.

When the end of the severed diaphragm is flipped over the stacking platform 3, the lifting mechanism is used to drive the stacking platform 3 up to receive the end of the diaphragm. Optionally, as described in the previous implementations, the first end 31 of the stacking platform 3 is used to receive and secure the end of the diaphragm.

It can be seen that the stacking platform 3 is driven to move back and forth along the horizontal direction by the translation mechanism 4, so that the separator is stacked on the stacking platform 3 in a Z shape, and the alternate coating of the positive electrode plate and the negative electrode plate is implemented. And by lifting and driving of the lifting mechanism, when the end of the cut diaphragm is turned over to above the stacking platform 3, the stacking platform 3 can receive and fix the end of the diaphragm.

Optionally, the stacking platform 3 is provided with adsorption holes, and the end part of the diaphragm is fixed on the stacking platform through adsorption holes. Of course, if the end of the membrane is received and fixed by the first end 31 of the stacking platform 3, the suction holes may be provided only at the first end 31 of the stacking platform 3.

As shown in fig. 7 to 8, optionally, the lamination machine in the embodiment of the present application further includes a first pressing mechanism 5, a first lifting module 7, a second lifting module (not shown in the drawings), and a second pressing mechanism 6 disposed on the movable component of the translation mechanism 4, where: the first hold-down mechanism 5 is located above the first end 31 of the stacking platform 3 and the first lifting module 7 is configured to drive the first hold-down mechanism 5 to hold down and release the membrane and pole pieces on the stacking platform 3 at the first end 31. The second hold-down mechanism 6 is located above the second end 32 of the stacking platform 3 and the second lifting module is configured to drive the second hold-down mechanism 6 to hold down and release the membrane and pole pieces on the stacking platform at the second end 32.

As described above, in the stacking process of the battery cells, the separator is stacked on the stacking platform 3 in a zigzag track, and after each separator layer 3 is laid, a pole piece is stacked on the laid separator layer. In particular, the second hold-down mechanism 6 presses the membrane at the second end 32 under the drive of the second lifting module as the membrane moves towards the first end 31 of the stacking platform 3. While the membrane is moved towards the second end 32 of the stacking platform 3, the first pressing mechanism 5 presses the membrane at the first end 31 under the drive of the first lifting module 7. In this way, a smooth stacking of the separator and the pole piece can be ensured.

As can be seen from fig. 3, optionally, during stacking of the battery cells, the counter roller 114 is kept at a position far away from the diaphragm adsorption mechanism 12, the diaphragm is delivered to the stacking platform 3 in an inclined state after passing through the positions of the diaphragm adsorption mechanism 12 and the diaphragm cutting mechanism 13, and when a layer of diaphragm covers the negative electrode sheet or the positive electrode sheet below, the counter roller 114 descends to enable the layer of diaphragm to be in a horizontal state, so that the diaphragm is prevented from being damaged when the first pressing mechanism 5 or the second pressing mechanism 6 presses the diaphragm, and the lamination quality is improved.

Alternatively, the first pressing mechanism 5 and the second pressing mechanism 6 have the same structure, taking the first pressing mechanism 5 as an example, as shown in fig. 7 and 8, the first pressing mechanism includes a pressing driving assembly 51, a first pressing piece 52 and a second pressing piece 53, the pressing driving assembly 51 is disposed on a movable component of the first lifting module 7, and the first pressing piece 52 and the second pressing piece 53 are connected in pairs on a driving end of the pressing driving assembly 51. The presser driving assembly 51 is used for driving the first presser 52 and the second presser 53 to approach toward the middle and separate toward the two sides so as to approach or avoid the diaphragm and the pole piece on the stacking platform 3.

The specific working process of the first pressing mechanism 5 is as follows:

In the initial state, the first and second press pieces 52, 53 are separated to both sides and are in a high position, i.e., the first and second press pieces 52, 53 are in a retracted position away from the first end 31 of the stacking platform 3.

When compression of the diaphragm and pole piece at the first end 31 of the stacking platform 3 needs to be performed, the tab drive assembly 51 first drives the first tab 52 and the second tab 53 toward the middle so that the first tab 52 and the second tab 53 are above the first end 31 of the stacking platform 3.

Next, after the diaphragms are lowered to the horizontal state with the counter roller 114, the first lift module 7 drives the first and second pressing pieces 52 and 53 to descend, so that the first and second pressing pieces 52 and 53 press the diaphragms at the first end 31 of the stacking platform 3.

When the diaphragm feeding device 1 needs to be avoided, the first lifting module 7 and the pressing piece driving assembly 51 are matched to drive the first pressing piece 52 and the second pressing piece 53 to return to the avoiding position.

The application has been described above in sufficient detail with a certain degree of particularity. It will be appreciated by those of ordinary skill in the art that the descriptions of the embodiments are merely exemplary and that all changes that come within the true spirit and scope of the application are desired to be protected. The scope of the application is indicated by the appended claims rather than by the foregoing description of the embodiments.

Claims (10)

1. The utility model provides a diaphragm material feeding unit, its characterized in that, diaphragm material feeding unit includes diaphragm conveying mechanism, diaphragm shutdown mechanism and diaphragm adsorption mechanism, wherein:

The diaphragm conveying mechanism, the diaphragm overturning mechanism and the diaphragm cutting mechanism are sequentially arranged;

The diaphragm conveying mechanism is configured to convey a continuous diaphragm, and the continuous diaphragm is conveyed to the stacking platform after passing through stations where the diaphragm adsorbing mechanism and the diaphragm cutting mechanism are located;

After the stacking of the battery cells is completed, the diaphragm adsorption mechanism is configured to adsorb a diaphragm positioned above the diaphragm adsorption mechanism, the diaphragm cutting mechanism is configured to cut off the diaphragm after the diaphragm adsorption mechanism adsorbs the diaphragm, and the end part of the cut diaphragm is kept adsorbed on the diaphragm adsorption mechanism;

the membrane suction mechanism is further configured to flip the end of the severed membrane onto the stacking platform, which is further configured to secure the end of the membrane.

2. The diaphragm feed apparatus of claim 1, wherein said diaphragm feed mechanism comprises a first mounting bracket, a compression assembly, a lift drive, and a clamp pair roller, said diaphragm passing sequentially through said compression assembly and said clamp pair roller, wherein:

The pressing component and the lifting driving piece are respectively arranged on the first mounting bracket;

The clamping pair roller is arranged at the movable end of the lifting driving piece, and the lifting driving piece is configured to drive the clamping pair roller to descend before the diaphragm cutting mechanism cuts off the diaphragm, so that the diaphragm between the clamping pair roller and the stacking platform is in a horizontal state and is attached to the adsorption surface of the diaphragm adsorption mechanism;

The hold down assembly is configured to clamp the diaphragm when the diaphragm severing mechanism severs the diaphragm.

3. The diaphragm feed apparatus of claim 2, wherein: the compressing component comprises a compression roller, a compression bar and a compression bar driving component, wherein,

The compression roller is fixedly connected to the first mounting bracket, the compression bar driving part is arranged on the first mounting bracket, and the compression bar is connected to the compression bar driving assembly and parallel to the compression roller;

A gap for the diaphragm to pass through is formed between the pressure bar and the pressure roller, and the pressure bar driving assembly is configured to drive the pressure bar to move towards or away from the pressure roller so as to release or press the diaphragm.

4. The diaphragm feed apparatus of claim 1, wherein: the diaphragm adsorption mechanism comprises a rotary driving component and an adsorption plate, wherein,

The rotary driving assembly is configured to drive the adsorption plate to turn up and down;

Before the adsorption plate is turned over, the adsorption surface of the adsorption plate faces upwards to adsorb the end part of the cut diaphragm above the adsorption plate;

after the adsorption plate is turned over, the adsorption surface of the adsorption plate faces downwards so as to turn over the end of the adsorbed cut-off diaphragm onto the stacking platform.

5. The diaphragm feed apparatus of claim 2, wherein said diaphragm severing mechanism comprises a cutter drive assembly and a hot cutter, wherein:

The cutter driving assembly is arranged on the first mounting bracket, and the hot cutter is connected to the driving end of the cutter driving assembly;

The cutter driving assembly is configured to drive the hot cutter to lift so as to drive the hot cutter to avoid or contact the diaphragm, and when the hot cutter contacts the diaphragm, the diaphragm is heated and cut off.

6. A lamination machine comprising a pole piece loading mechanism, a diaphragm feeding device according to any one of claims 1-5, a stacking platform and a cell blanking mechanism, wherein:

The pole piece feeding mechanism is configured to alternately send the positive pole pieces and the negative pole pieces to the stacking platform;

the membrane feeding device is configured to feed membranes onto the stacking platform;

The stacking platform is configured to cooperate with the pole piece feeding mechanism and the diaphragm feeding device to stack the sequentially received positive pole piece, negative pole piece and diaphragm into an electric core;

the battery cell blanking mechanism is used for moving the stacked battery cells away from the stacking platform and temporarily storing the stacked battery cells.

7. The lamination machine of claim 6, further comprising a translation mechanism and a lifting mechanism, wherein the stacking platform is disposed on a movable member of the translation mechanism and in driving connection with the lifting mechanism, wherein:

The translation mechanism is configured to drive the stacking platform to move back and forth along the horizontal direction so that the first end and the second end on the stacking platform alternately move below the discharging end of the diaphragm feeding device;

When the end of the severed diaphragm is flipped over the stacking platform, the lift mechanism is configured to drive the stacking platform up to receive the end of the diaphragm.

8. The lamination machine of claim 7, wherein the stacking platform is provided with an adsorption hole, and the end of the diaphragm is adsorbed and fixed on the stacking platform through the adsorption hole.

9. The lamination machine of claim 7, further comprising a first hold-down mechanism, a first lift module, a second lift module, and a second hold-down mechanism disposed on the movable member of the translation mechanism, wherein:

The first pressing mechanism is positioned above the first end of the stacking platform, and the first lifting module is configured to drive the first pressing mechanism to press and release the diaphragm and the pole piece on the stacking platform at the first end;

the second hold-down mechanism is located above the second end of the stacking platform, and the second lifting module is configured to drive the second hold-down mechanism to hold down and release the diaphragm and the pole piece on the stacking platform at the second end.

10. The lamination machine of claim 9, wherein the first compression mechanism and the second compression mechanism are identical in structure, the first compression mechanism comprises a compression driving assembly, a first compression sheet and a second compression sheet, the compression driving assembly is arranged on a movable part of the first lifting module, and the first compression sheet and the second compression sheet are connected to driving ends of the compression driving assembly in pairs;

the pressing sheet driving assembly is used for driving the first pressing sheet and the second pressing sheet to be close to the middle and separate to the two sides so as to approach or avoid the diaphragm and the pole piece on the stacking platform.