A pole piece stacking device and a battery production line

Abstract

The present invention discloses a pole piece stacking device and a battery production line. The pole piece stacking device includes a stacking jig, a stacking station, and a conveying component. The stacking jig includes a stacking platform and a plurality of pressing knives. Opening and closing components are arranged on both sides of the stacking station. The pressing knife includes a knife body and a follower component. The opening and closing component includes a driving component and an actuating component. The conveying component conveys the stacking jig to move on the stacking station, so that the follower component of the opening and closing component contacts the actuating component of the pressing knife. The driving component drives the actuating component to move, and the actuating component drives the follower component to move, which can realize the opening and pressing of the pressing knife. The opening and closing components are arranged on both sides of the stacking station, and the pressing knives are arranged on the stacking platform. The opening and closing components as the power source are separately arranged from the pressing knives, which can reduce the moving mass and inertia during the opening and closing of the pressing knives, reduce the load during the opening and closing of the pressing knives, ensure the stability of mechanical movement, can stack and press multiple pole pieces simultaneously, and improve the stacking efficiency of the pole pieces.

Description

Technical Field

[0001] The present invention relates to the field of core lamination production, and particularly to a pole piece stacking device and a battery production line. Background Art

[0002] Lithium batteries have many advantages such as high energy, no memory effect, no pollution, small self-discharge, and long cycle life, and thus are widely used in various devices. Generally, a core is formed by alternately laminating positive and negative pole pieces. During the pole piece stacking process of the core, a pressing knife is required to press the pole pieces and the separator to ensure the stability of the pole pieces and the separator during the stacking process. Existing pole piece stacking devices usually use a cam mechanism to control the opening and closing of the pressing knife. The cam mechanism and the pressing knife are arranged on the pole piece stacking device. When opening and closing the pressing knife, the pole piece stacking device needs to bear a large load, and the stability of the opening and closing of the pressing knife is low; due to the influence of motion inertia and load, existing pole piece stacking devices cannot stack and press multiple pole pieces simultaneously, which affects the stacking efficiency of the pole pieces. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. For this purpose, the present invention provides a pole piece stacking device with strong stability and capable of stacking and pressing multiple pole pieces simultaneously.

[0004] The present invention also provides a battery production line having the above-mentioned pole piece stacking device.

[0005] According to an embodiment of the first aspect of the present invention, a pole piece stacking device includes

[0006] a lamination fixture, the lamination fixture including a lamination platform and a plurality of pressing knives arranged on both sides of the lamination platform;

[0007] a lamination station, with opening and closing components for controlling the opening and closing of the pressing knives arranged on both sides of the lamination station;

[0008] a conveying component, the conveying component being arranged on the lamination station;

[0009] wherein, the pressing knife includes a knife body and a follower component for driving the knife body to move, the opening and closing component includes a driving component and an actuating component, and the conveying component conveys the lamination fixture to move on the lamination station, so that the follower component contacts the actuating component, and the driving component drives the actuating component to move to drive the knife body to move.

[0010] A pole piece stacking device according to an embodiment of the first aspect of the present invention has at least the following beneficial effects: A pole piece stacking device of the present invention includes a lamination jig, a lamination station, and a conveying component. The lamination jig includes a lamination platform and a plurality of pressing knives arranged on both sides of the lamination platform. Opening and closing components for controlling the opening and closing of the pressing knives are arranged on both sides of the lamination station. The pressing knife includes a knife body and a follower component. The opening and closing component includes a driving component and an actuating component. The conveying component conveys the lamination jig to move on the lamination station, so that the follower component of the opening and closing component contacts the actuating component of the pressing knife. The driving component drives the actuating component to move, and the actuating component drives the follower component to move, enabling the opening and closing of the pressing knife. The opening and closing components are arranged on both sides of the lamination station, and the pressing knives are arranged on the lamination platform. The opening and closing components as the power source are separately arranged from the pressing knives, which can reduce the moving mass and inertia when the pressing knives open and close, reduce the load when the pressing knives open and close, ensure the stability of mechanical movement, and can stack and press multiple pole pieces simultaneously, improving the stacking efficiency of the pole pieces.

[0011] According to some embodiments of the present invention, the pressing knife includes a diaphragm pressing knife and a plurality of pole piece pressing knives, and the diaphragm pressing knife is arranged on both sides of the pole piece pressing knives.

[0012] According to some embodiments of the present invention, the opening and closing component includes a first opening and closing component for controlling the opening and closing of the diaphragm pressing knife and a second opening and closing component for controlling the opening and closing of the pole piece pressing knives.

[0013] According to some embodiments of the present invention, the opening and closing components are arranged on both sides of the lamination station, and two opening and closing components are arranged on each side of the lamination station. The two opening and closing components are symmetrically arranged at the head and tail ends of the lamination station to stack the positive pole pieces and the negative pole pieces respectively.

[0014] According to some embodiments of the present invention, the follower component includes a first follower component for driving the longitudinal movement of the knife body and a second follower component for driving the lateral movement of the knife body. The first follower component includes a first guide rail slider, a first moving plate slidable on the first guide rail slider, and a first follower arranged on the first moving plate. The second follower component includes a second guide rail slider, a second moving plate slidable on the second guide rail slider, and a second follower arranged on the second moving plate.

[0015] According to some embodiments of the present invention, the actuating component includes a first cam follower plate and a second cam follower plate. The driving component includes a first driving component for driving the longitudinal movement of the first cam follower plate and a second driving component for driving the lateral movement of the second cam follower plate.

[0016] According to some embodiments of the present invention, a preheating component is further arranged below the lamination platform.

[0017] According to some embodiments of the present invention, the lamination fixture further includes a mounting base, and the pressing blade is detachably mounted on the mounting base.

[0018] According to some embodiments of the present invention, the conveying component includes a first conveying component and a second conveying component, and the first conveying component and the second conveying component convey the reciprocating movement of the lamination platform at the lamination station.

[0019] The battery production line according to the embodiment of the second aspect of the present invention includes a pole piece stacking device according to the embodiment of the first aspect above.

[0020] The battery production line according to the embodiment of the second aspect of the present invention has at least the following beneficial effects: A battery production line according to the embodiment of the second aspect of the present invention can stack and press multiple pole pieces simultaneously by using a pole piece stacking device in the embodiment of the first aspect, improving the stacking efficiency of the pole pieces, and thus improving the battery production efficiency.

[0021] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0023] Figure 1 is a schematic structural diagram of a pole piece stacking device according to an embodiment of the present invention;

[0024] Figure 2 is Figure 1 a schematic structural diagram of the lamination fixture shown;

[0025] Figure 3 is Figure 1 a schematic structural diagram of the opening and closing assembly shown;

[0026] Figure 4 is Figure 1 a schematic structural diagram of the pressing blade shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0028] In the description of the present invention, it should be understood that with respect to the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, inside, outside, etc., it is based on the orientation or positional relationship shown in the drawings. It 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. Therefore, it should not be construed as a limitation to the present invention.

[0029] In the description of the present invention, the meaning of "a number of" is one or more, the meaning of "a plurality of" is two or more, and understandings such as "greater than", "less than", "exceeding", etc. do not include the recited number, while understandings such as "above", "below", "within", etc. include the recited number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, words such as "set", "installed", "connected", "assembled", "fitted", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0031] The following refers to Figures 1 to 4 Describe a pole piece stacking device according to an embodiment of the present invention.

[0032] A pole piece stacking device according to an embodiment of the present invention, such as Figures 1 to 4As shown, it includes a lamination fixture 100, a lamination station 200, and a conveying component. The lamination fixture 100 includes a lamination platform 110 and a number of pressing knives arranged on both sides of the lamination platform 110. The diaphragm is placed on the lamination platform 110, and the electrode sheet is placed on the diaphragm. The pressing knives press the diaphragm and the electrode sheet to facilitate the sequential stacking of the diaphragm and the electrode sheet. The lamination station 200 is used for stacking the electrode sheets. On both sides of the lamination station 200, there are opening and closing components for controlling the opening and closing of the pressing knives. The opening and closing components control the opening and closing of the pressing knives. The conveying component conveys the lamination fixture 100. Under the action of the conveying component, the lamination fixture 100 is conveyed to the lamination station 200. The opening and closing components on both sides of the lamination station 200 cooperate with the pressing knives on both sides of the lamination platform 110 to control the opening and closing of the pressing knives, and complete the placement and pressing of the electrode sheets. Specifically, the pressing knife includes a knife body 120 and a follower component for driving the movement of the knife body. The opening and closing component includes a driving component and an action component that cooperates with the follower component. The conveying component conveys the lamination fixture 100 to move on the lamination station 200, so that the follower component contacts the action component. The follower component is clamped in the action component. The driving component drives the movement of the action component, and the action component can drive the follower component to move. The follower component drives the movement of the knife body 123 to realize the longitudinal and lateral movement of the knife body 123 to press the diaphragm and the electrode sheet on the lamination platform 110. The opening and closing components are arranged on both sides of the lamination station 200, and the pressing knives are arranged on the lamination platform 110. The opening and closing components as the power source are separated from the pressing knives, which can reduce the moving mass and inertia when the pressing knives open and close, reduce the load when the pressing knives open and close, ensure the stability of mechanical movement, can stack and press multiple electrode sheets at the same time, and improve the stacking efficiency of the electrode sheets.

[0033] Referring to Figure 1 and Figure 2 According to some embodiments of the present invention, the pressing knife includes a diaphragm pressing knife 121 and a number of electrode sheet pressing knives 122. There are two diaphragm pressing knives 121, and the two diaphragm pressing knives 121 are arranged on both sides of the electrode sheet pressing knives 122. The diaphragm pressing knife 121 is used to press the diaphragm to ensure the stability of the diaphragm position during the placement of the electrode sheet. After the electrode sheet is placed, the electrode sheet pressing knife 122 presses the electrode sheet to facilitate laying the diaphragm on the electrode sheet and ensure the stability of the electrode sheet position. The two diaphragm pressing knives 121 are arranged on both sides of the electrode sheet pressing knives 122, and can press the diaphragms on both sides of the electrode sheet simultaneously or separately as needed, improving the applicability. It can be understood that in some embodiments, there are four electrode sheet pressing knives 122, and the four electrode sheet pressing knives 122 can stack four electrode sheets correspondingly at the same time, improving the stacking efficiency of the electrode sheets. It can be understood that in some other embodiments, the number of electrode sheet pressing knives 122 can be set to three, five, six or other numbers according to actual production requirements, all within the protection scope of the present invention.

[0034] Referring to Figure 1 and Figure 4, according to some embodiments of the present invention, the follower components include a first follower component for driving the tool body 123 to move longitudinally and a second follower component for driving the tool body 123 to move laterally. The first follower component includes a first guide rail slider 126, a first moving plate slidable on the first guide rail slider 126, a first follower 124 provided on the first moving plate, and a first tension spring 128 for driving the first moving plate to rebound. The second follower component includes a second guide rail slider 127, a second moving plate slidable on the second guide rail slider 127, a second follower 125 provided on the second moving plate, and a second tension spring 129 for driving the second moving plate to rebound. The conveying component conveys the lamination fixture 100, and the lamination fixture 100 is conveyed to the lamination station 200 under the action of the conveying component. The opening and closing components on both sides of the lamination station 200 cooperate with the pressing knives on both sides of the lamination platform 110, and the opening and closing components can control the opening and closing of the pressing knives. Specifically, the opening and closing components cooperate with the first follower 124 to drive the first follower 124 to move. The first follower 124 drives the first moving plate to move relative to the first guide rail slider 126, realizing the longitudinal movement of the tool body 123, so that the tool body 123 moves upward to disengage from the diaphragm or the electrode sheet; the opening and closing components cooperate with the second follower 125 to drive the second follower 125 to move, which can drive the second moving plate to move relative to the second guide rail slider 127, realizing the lateral movement of the tool body 123, so that the tool body 123 laterally moves out above the diaphragm or the electrode sheet, avoiding interference between the tool body 123 and the electrode sheet, and facilitating the subsequent stacking of the electrode sheets. In some embodiments, the first follower 124 and the second follower 125 are set as follower wheels or balls, and both the follower wheels and the balls can roll relative to the opening and closing components, reducing the friction between the first follower 124 and the second follower 125 and the opening and closing components, and making the movement of the first follower 124 and the second follower 125 relative to the opening and closing components smoother. The first follower component and the second follower component are respectively provided with a first tension spring 128 and a second tension spring 129. The first tension spring 128 can tighten the first moving plate, and the second tension spring 129 can tighten the second moving plate. After the first follower component and the second follower component disengage from the opening and closing components, the first tension spring 128 and the second tension spring 129 can pull the tool body 123 to reset, and the tool body 123 performs lateral and longitudinal movements to press the diaphragm and the electrode sheet on the diaphragm, ensuring the stability of the electrode sheet on the diaphragm.

[0035] Refer to Figure 1 and Figure 3, according to some embodiments of the present invention, the moving member includes a first cam follower plate 133 and a second cam follower plate 134, and the driving member includes a first driving member 135 for driving the first cam follower plate 133 to move longitudinally and a second driving member 136 for driving the second cam follower plate 134 to move laterally. The first driving member 135 can drive the first cam follower plate 133 to move longitudinally, and the second driving member 136 can drive the second cam follower plate 134 to move laterally. The first cam follower plate 133 cooperates with the first follower 124, and the second cam follower plate 134 cooperates with the second follower 125, which can drive the pressing knife to move laterally and longitudinally. Specifically, when the lamination fixture 100 is transported to the lamination station 200 under the action of the conveying member, the pressing knives on both sides of the lamination fixture 100 contact the opening and closing components on both sides of the lamination station 200. At this time, the first follower 124 is engaged in the first cam follower plate 133, and the second follower 125 is engaged in the second cam follower plate 134. The first driving member 135 drives the first cam follower plate 133 to move longitudinally, and the second driving member 136 drives the second cam follower plate 134 to move laterally, which can realize the movement of the tool body 123 relative to the diaphragm and the pole piece, and control the pressing and releasing of the tool body 123. It should be noted that, in some embodiments, the first follower 124 and the second follower 125 are provided with follower wheels, and the first cam follower plate 133 and the second cam follower plate 134 are provided with limiting grooves for the movement of the follower wheels. When the lamination fixture 100 is transported to the lamination station 200 under the action of the conveying member, the pressing knives on both sides of the lamination fixture 100 contact the opening and closing components on both sides of the lamination station 200, and the follower wheels are engaged in the limiting grooves to realize the connection between the opening and closing components and the pressing knives. It can be understood that, in some embodiments, the first driving member 135 and the second driving member 136 are set as linear motors. The first driving member 135 and the second driving member 136 are arranged on both sides of the lamination station 200 and separated from the lamination station 200, which can reduce the mass and movement inertia of the opening and closing components and is beneficial to the opening and closing of the pressing knives. It should be noted that guiding grooves are provided on both sides of the first cam follower plate 133 and the second cam follower plate 134. The guiding grooves can guide the follower wheels, facilitate the engagement of the first follower 124 and the second follower 125 into the limiting grooves, and complete the connection between the follower member and the moving member.

[0036] Refer to Figure 1 and Figure 3, according to some embodiments of the present invention, the opening and closing assembly includes a first opening and closing member 131 for controlling the opening and closing of the diaphragm pressing knife 121 and a second opening and closing member 132 for controlling the opening and closing of the electrode pressing knife 122. The first opening and closing member 131 and the second opening and closing member 132 respectively control the diaphragm pressing knife 121 and the electrode pressing knife 122. Specifically, when the stacking jig 100 is transported to the stacking station 200 under the action of the conveying member, the second opening and closing member 132 controls the electrode pressing knife 122 to open, and the first opening and closing member 131 controls the diaphragm pressing knife 121 to press the diaphragm to ensure the stability of the diaphragm position during the placement of the electrode. After the electrode is placed, the second opening and closing member 132 controls the electrode pressing knife 122 to press the electrode, so as to facilitate laying the diaphragm on the electrode and ensure the stability of the electrode position. It can be understood that the second opening and closing member 132 can control multiple electrode pressing knives 122 at the same time, and control the opening and closing of multiple electrode pressing knives 122 at the same time, so as to stack or press multiple electrodes at the same time and improve the stacking efficiency of the electrodes.

[0037] Refer to Figure 1 , according to some embodiments of the present invention, the opening and closing assembly is arranged on both sides of the stacking station 200. Two opening and closing assemblies are arranged on each side of the stacking station 200, and the two opening and closing assemblies are symmetrically arranged at the head and tail ends of the stacking station 200 to stack the positive electrode and the negative electrode respectively. The two opening and closing assemblies control the pressing knife, enabling the pressing knife to open and close twice to stack the positive electrode and the negative electrode respectively. Specifically, the two opening and closing assemblies are arranged at the head and tail ends of the stacking station 200. The stacking jig 100 moves back and forth on the stacking station 200 under the action of the conveying member, and stacks the positive electrode and the negative electrode at the head and tail ends of the stacking station 200 respectively, improving the stacking efficiency of the electrodes. The opening and closing assembly is arranged on both sides of the stacking station 200, and two opening and closing assemblies are arranged on each side of the stacking station 200, which can stack the electrodes on both sides, increase the stacking quantity of the electrodes, and improve the stacking efficiency of the electrodes. It should be noted that in some other embodiments, multiple opening and closing assemblies can be arranged on each side of the stacking station 200. The stacking jig 100 moves back and forth through multiple opening and closing assemblies on the stacking station 200 under the action of the conveying member, and can stack the electrodes multiple times, which is also within the protection scope of the present invention.

[0038] Refer to Figure 1, according to some embodiments of the present invention, a preheating component for heating the battery cells is further provided in the lamination platform 110. The lamination jig 100 includes a lamination platform 110. A preheating component is provided in the lamination platform 110. The separator and the electrode sheet are placed on the lamination platform 110. The preheating component can preheat the electrode sheet and the separator, which is beneficial to the subsequent hot pressing process and improves the production efficiency of the battery cells. Specifically, in some embodiments, the preheating component is set as an electric heating tube, and the electric heating tube is arranged in the lamination platform to heat the separator and the electrode sheet on the lamination platform. It can be understood that the preheating component can also be set as other heating elements such as electric heating paint, PTC electric heating elements, etc., as long as the heating function can be realized.

[0039] Refer to Figure 1 and Figure 2 , according to some embodiments of the present invention, the lamination jig 100 further includes a mounting base for supporting the lamination platform 110, and the pressing knife is detachably mounted on the mounting base. The lamination jig includes a lamination platform 110 and a mounting base. The mounting base is provided with two supporting parts 111, and the lamination platform 110 is arranged between the two supporting parts 111. The supporting parts 111 support the lamination platform 110. The supporting parts 111 support the lamination platform 110 from both sides of the lamination platform 110, and the bottom of the lamination platform 110 is suspended, which can reduce the conveying pressure of the conveying component, reduce the moving mass and inertia of the lamination jig, and make the movement of the lamination jig more stable. It can be understood that, in some embodiments, the supporting part 111 is provided with a reinforcing rib, and the setting of the reinforcing rib can improve the supporting strength of the supporting part 111 and ensure the stability of the lamination platform 110.

[0040] According to some embodiments of the present invention, the conveying component includes a first conveying component and a second conveying component. The first conveying component and the second conveying component are used to realize the reciprocating movement of the lamination platform 110 on the lamination station 200. The first conveying component and the second conveying component are arranged inside the lamination station 200. The first conveying component includes a first conveyor belt and a first lifting component arranged below the first conveyor belt. The second conveying component includes a second conveyor belt and a second lifting component arranged below the second conveyor belt. The first conveyor belt and the second conveyor belt cooperate to realize the reciprocating movement of the lamination platform 110 on the lamination station 200 and complete the stacking of the electrode sheets. The first conveying component includes a first conveyor belt and a first lifting component arranged below the first conveyor belt. The first lifting component can lift the first conveyor belt and the lamination fixture 100 placed on the first conveyor belt, and can transport the lamination fixture 100 from the first conveyor belt to the second conveyor belt to complete the transfer of the lamination fixture 100. The second conveying component includes a second conveyor belt and a second lifting component arranged below the second conveyor belt. The second lifting component can lift the second conveyor belt and the lamination fixture 100 placed on the second conveyor belt, and can transport the lamination fixture 100 from the second conveyor belt to other conveyor belts to complete the transfer of the lamination fixture 100. It can be understood that baffles are arranged on both the first conveyor belt and the second conveyor belt. The baffles are arranged on both sides of the first conveyor belt and the second conveyor belt. The baffles can position the two ends of the lamination fixture 100 to avoid slipping caused by insufficient friction, improve the conveying capacity of the first conveyor belt and the second conveyor belt for the lamination fixture 100, and make the movement of the lamination fixture 100 on the first conveyor belt and the second conveyor belt more stable.

[0041] A battery production line (not shown in the figure) according to an embodiment of the second aspect of the present invention includes a kind of electrode sheet stacking device according to the embodiment of the first aspect of the present invention. A battery production line according to an embodiment of the second aspect of the present invention can stack and press multiple electrode sheets simultaneously by using a kind of electrode sheet stacking device according to the embodiment of the first aspect, improve the stacking efficiency of the electrode sheets, and thus improve the battery production efficiency.

[0042] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A pole piece stacking device, characterized in that, Comprising: A lamination jig, which includes a lamination platform and a number of pressing knives arranged on both sides of the lamination platform; A lamination station, on both sides of which there are opening and closing components for controlling the opening and closing of the pressing knives, and the opening and closing components are separately arranged from the pressing knives; A conveying component, which is arranged on the lamination station; Wherein, the pressing knife includes a knife body and a follower component for driving the movement of the knife body, the opening and closing component includes a driving component and an actuating component, the conveying component conveys the lamination jig to move on the lamination station, so that the follower component contacts the actuating component, and the driving component drives the actuating component to move to drive the movement of the knife body.

2. The pole piece stacking device according to claim 1, characterized in that, The pressing knife includes a diaphragm pressing knife and a number of electrode pressing knives, and the diaphragm pressing knife is arranged on both sides of the electrode pressing knives.

3. The pole piece stacking device according to claim 2, characterized in that, The opening and closing component includes a first opening and closing component for controlling the opening and closing of the diaphragm pressing knife and a second opening and closing component for controlling the opening and closing of the electrode pressing knives.

4. The pole piece stacking device according to claim 3, characterized in that, The opening and closing components are arranged on both sides of the lamination station, and on each side of the lamination station, there are two such opening and closing components, and the two opening and closing components are symmetrically arranged at the head and tail ends of the lamination station to stack the positive electrode sheets and the negative electrode sheets respectively.

5. The pole piece stacking device according to claim 1, characterized in that, The follower component includes a first follower component for driving the longitudinal movement of the knife body and a second follower component for driving the transverse movement of the knife body. The first follower component includes a first guide rail slider, a first moving plate slidable on the first guide rail slider, and a first follower arranged on the first moving plate. The second follower component includes a second guide rail slider, a second moving plate slidable on the second guide rail slider, and a second follower arranged on the second moving plate.

6. The pole piece stacking device according to claim 5, characterized in that, The actuating component includes a first cam follower plate and a second cam follower plate, and the driving component includes a first driving component for driving the longitudinal movement of the first cam follower plate and a second driving component for driving the transverse movement of the second cam follower plate.

7. The pole piece stacking device according to claim 1, characterized in that, A preheating component is also arranged below the lamination platform.

8. The pole piece stacking device according to claim 1, characterized in that, The lamination jig further includes a mounting seat, and the pressing knife is detachably mounted on the mounting seat.

9. The pole piece stacking device according to claim 1, characterized in that, The conveying component includes a first conveying component and a second conveying component, and the first conveying component and the second conveying component convey the reciprocating movement of the lamination platform on the lamination station.

10. A battery production line, characterized in that, Including a kind of electrode sheet stacking device according to any one of claims 1 to 9.

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