Laminated cell production system

Abstract

The present invention relates to a laminated battery cell production system, comprising: an anode conveying mechanism capable of providing anode units of a predetermined size; an isolating film packaging mechanism, arranged downstream of the anode conveying mechanism, for clamping the anode unit between isolating films; a laminating mechanism capable of connecting with the isolating films and stacking the isolating films; an electrostatic mechanism, arranged upstream of the isolating film packaging mechanism, capable of charging the isolating films to adsorb the anode units; a cathode conveying mechanism, arranged upstream of the laminating mechanism, capable of providing cathode units of a predetermined size; a cathode composite mechanism, arranged downstream of the cathode conveying mechanism, the isolating film can pass through the cathode composite mechanism to the laminating mechanism, and the cathode composite mechanism is used to connect the cathode unit to the surface of the isolating film away from the anode unit. The laminated battery cell production system provided by the embodiment of the present invention can improve the laminating accuracy and efficiency, occupies a small area, and is conducive to the production and manufacturing of batteries.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage production equipment, and in particular to a laminated battery core production system. Background Art

[0002] At present, stacked cells are widely used in the industry to make batteries because of their advantages of high rate and high energy density compared to wound cells, and they can also be made into various special-shaped batteries according to different needs.

[0003] In traditional stacking equipment, the electrode sheets are first punched out and formed by an electrode punching machine and installed on a material box. After a material box is filled, the electrode sheets are transferred to the stacking machine and stacked through a stacking platform. The stacking platform usually stacks the electrodes in a linear motion. Specifically, in the production process of stacked battery cells, the stacking platform is first translated to the position of the positive electrode sheets to stack the positive electrode sheets. After the positive electrode sheets are stacked, the stacking platform is moved linearly to the position of the negative electrode sheets to stack the negative electrode sheets. This stacking method has the disadvantages of low stacking efficiency and large footprint, which is not conducive to the production of stacked battery cells.

[0004] Therefore, a new laminated battery cell production system is urgently needed. Summary of the invention

[0005] The embodiment of the present invention provides a laminated battery cell production system, which can improve the stacking efficiency, reduce the floor space, and facilitate the production of laminated battery cells.

[0006] On the one hand, according to an embodiment of the present invention, a stacked battery cell production system is proposed, including: an anode conveying mechanism, capable of providing anode units of predetermined sizes; an isolation film packaging mechanism, arranged downstream of the anode conveying mechanism, the isolation film packaging mechanism is used to clamp the anode units between isolation films; a stacking mechanism, arranged downstream of the isolation film packaging mechanism, the stacking mechanism can be connected to the isolation films to stack the isolation films; an electrostatic mechanism, arranged upstream of the isolation film packaging mechanism, the electrostatic mechanism can charge the isolation films to adsorb the anode units; a cathode conveying mechanism, arranged upstream of the stacking mechanism, the cathode conveying mechanism can provide cathode units of predetermined sizes; a cathode composite mechanism, arranged downstream of the cathode conveying mechanism, the isolation film can pass through the cathode composite mechanism to the stacking mechanism, the cathode composite mechanism is used to connect the cathode unit to the surface of the isolation film away from the anode unit.

[0007] According to one aspect of an embodiment of the present invention, the laminated battery cell production system further includes a dust removal mechanism; a dust removal mechanism is arranged between the anode conveying mechanism and the isolation film packaging mechanism to clean the anode unit; and / or a dust removal mechanism is arranged between the cathode conveying mechanism and the cathode composite mechanism to clean the cathode unit.

[0008] According to one aspect of an embodiment of the present invention, the dust removal mechanism includes a belt brush and a dust suction device, wherein the belt brush can convey the anode unit or the cathode unit and can peel off the dust on the anode unit or the cathode unit, and the dust suction device sucks and recovers the dust.

[0009] According to one aspect of an embodiment of the present invention, the number of cathode conveying mechanisms is more than two, and any two cathode conveying mechanisms are relatively arranged on both sides of the isolation film packaging mechanism; and / or, the number of anode conveying mechanisms is more than two, and any two anode conveying mechanisms are relatively arranged.

[0010] According to one aspect of an embodiment of the present invention, the stacked battery cell production system further includes an isolation film conveying mechanism, which is arranged between the anode conveying mechanism and the isolation film packaging mechanism. The isolation film conveying mechanism includes at least one group of isolation film conveying devices used in pairs, and each isolation film conveying device can release the isolation film.

[0011] According to one aspect of an embodiment of the present invention, the isolation film packaging mechanism includes a guiding device and a heat sealing device, the guiding device can receive two isolation films, the heat sealing device has a heat sealing head, and the heat sealing head can heat seal the two isolation films at a preset interval so that the anode unit is fixedly clamped between the two isolation films.

[0012] According to one aspect of an embodiment of the present invention, the heat sealing device includes heat sealing rollers used in pairs, and heat sealing heads are arranged on the outer peripheral surfaces of the heat sealing rollers. The two heat sealing rollers used in pairs can rotate synchronously and their respective heat sealing heads can dock with each other during the rotation of the heat sealing rollers.

[0013] According to one aspect of an embodiment of the present invention, a heat sealing device includes a packaging component and a guiding component, wherein the packaging component is arranged on the guiding component; the packaging component includes a base and a heat sealing assembly connected to the base, wherein the base is connected to the guiding component, and the base can move along the length direction of the guiding component; the heat sealing assembly includes two heat sealing heads connected to the base, wherein the two heat sealing heads are arranged opposite to each other in the height direction of the guiding component and leave a heat sealing gap for an isolation membrane connected to an anode unit to pass through, and a flexible thermal conductive pad is connected to at least one of the two heat sealing heads, and the flexible thermal conductive pad is located in the heat sealing gap.

[0014] According to one aspect of an embodiment of the present invention, the guiding device is arranged between the anode conveying mechanism and the cathode conveying mechanism; the guiding device includes multiple groups of guiding roller groups, the multiple groups of guiding roller groups are arranged at intervals, each group of guiding roller groups includes clamping rollers used in pairs, the clamping rollers are used to clamp and transport the isolation film, and the heat sealing device is arranged upstream, downstream or between any two groups of guiding roller groups; or, the guiding device includes transmission components used in pairs, each group of transmission components includes a transmission wheel and a transmission belt coordinated with the transmission wheel, the transmission belts of the two transmission components of the same pair are at least partially arranged in parallel with each other and jointly clamp and transport the isolation film, and the heat sealing device is arranged upstream or downstream of the guiding device.

[0015] According to one aspect of an embodiment of the present invention, the cathode composite mechanism includes a hot press plate group arranged downstream of the cathode conveying mechanism, the hot press plate group includes a first hot press plate and a second hot press plate arranged opposite to each other, and a gap is formed between the first hot press plate and the second hot press plate for the passage of an isolation membrane connected to the anode unit and the cathode unit.

[0016] According to one aspect of an embodiment of the present invention, the cathode composite mechanism further includes a protective component arranged downstream of the cathode conveying mechanism, and the first hot pressing plate and the second hot pressing plate are respectively provided with protective components, and the protective components include a protective belt and a guide wheel coordinated with the protective belt transmission, and the protective belt of each protective component at least partially extends into the gap.

[0017] According to the laminated battery production system provided by the embodiment of the present invention, the anode unit can be provided by the anode conveying mechanism, the anode unit can be clamped between the separators by the separator packaging mechanism, the cathode conveying mechanism can provide a cathode unit of a predetermined size, and the cathode composite mechanism is arranged downstream of the cathode conveying mechanism, the separator passes through the cathode composite mechanism to the laminating mechanism, so that the cathode unit is connected to the surface of the separator away from the anode unit, and the separators connected with the anode unit and the cathode unit can be directly and continuously stacked through the laminating mechanism to form a laminated battery, the laminating efficiency is high, and the entire laminated battery production system occupies a small area. At the same time, the corresponding electrostatic mechanism enables the anode unit provided by the anode conveying mechanism to be directly attached to the separator under the action of static electricity, and the laminating mechanism can meet the laminating requirements without reciprocating transfer, further improving the laminating efficiency, and the corresponding separator packaging structure can be combined with the electrostatic mechanism to achieve double positioning of the relative position of the anode unit and the separator, the positioning is more accurate, and it is more conducive to the production and manufacturing of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Features, advantages, and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0019] Figure 1It is a structural schematic diagram of a laminated battery cell production system according to an embodiment of the present invention;

[0020] Figure 2 is a schematic diagram of a laminated battery cell production system according to an embodiment of the present invention;

[0021] Figure 3 is a schematic structural diagram of an anode transport mechanism according to an embodiment of the present invention;

[0022] Figure 4 is a schematic structural diagram of an isolation film packaging mechanism according to an embodiment of the present invention;

[0023] Figure 5 is a schematic structural diagram of a cathode conveying mechanism according to an embodiment of the present invention;

[0024] Figure 6 is a schematic diagram of a laminated battery cell production system according to another embodiment of the present invention;

[0025] Figure 7 is a schematic structural diagram of a cathode composite mechanism according to an embodiment of the present invention;

[0026] Figure 8 is a structural schematic diagram of a laminated battery cell production system according to another embodiment of the present invention;

[0027] Fig. 9 is a structural schematic diagram of a laminated battery cell production system according to another embodiment of the present invention;

[0028] Fig.10 yes Fig. 9 A schematic diagram of the structure of the middle guide device;

[0029] Fig.11 is a schematic structural diagram of a heat sealing device according to another embodiment of the present invention;

[0030] Fig.12 is a schematic structural diagram of a packaging component according to an embodiment of the present invention;

[0031] Fig.13 yes Fig.11 The working principle diagram of the heat sealing device shown.

[0032] in:

[0033] 1- anode conveying mechanism; 11- anode unwinding device; 12- anode cutting device; 13- anode deviation correcting device; 14- anode driving wheel; 15- anode guide roller;

[0034] 2-Isolation film packaging mechanism;

[0035] 21-heat sealing device; 211-heat sealing roller; 212-heat sealing head; 213-guiding component; 214-packaging component; 2141-base; 2142-heat sealing component; 2143-heat sealing gap; 2144-flexible thermal pad; 2145-lifting component; 2145a-telescopic cylinder; 2145b-adapter plate;

[0036] 22-guiding device; 221-guiding roller group; 23-transmission assembly; 231-transmission wheel; 232-transmission belt;

[0037] 3-isolation film conveying mechanism; 31-isolation film conveying device;

[0038] 4-dust removal mechanism; 41-belt brush; 42-dust suction device;

[0039] 5-Electrostatic mechanism;

[0040] 6- cathode conveying mechanism; 61- cathode unwinding device; 62- cathode cutting device; 63- cathode deviation correcting device; 64- cathode driving wheel; 65- cathode guide roller;

[0041] 7- cathode composite mechanism; 71- hot pressing plate group; 711- first hot pressing plate; 712- second hot pressing plate; 713- gap; 72- protection assembly; 721- protection belt; 722- guide wheel; 73- clamping guide device; 731- traction roller; 732- traction belt;

[0042] 8-Lamination mechanism;

[0043] 10- isolation membrane; 101- input end; 102- end;

[0044] 20-anode sheet; 201-anode unit;

[0045] 30- cathode sheet; 301- cathode unit.

[0046] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0047] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the detailed description below, many specific details are proposed in order to provide a comprehensive understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention. In the drawings and the following description, at least part of the known structures and technologies are not shown in order to avoid unnecessary ambiguity of the present invention; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0048] The directional words appearing in the following description are all directions shown in the figure, and do not limit the specific structure of the laminated battery cell production system of the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0049] In order to better understand the present invention, Figures 1 to 13 A laminated battery cell production system according to an embodiment of the present invention is described in detail.

[0050] See also Figure 1 , Figure 1 The structure diagram of a laminated battery cell production system according to an embodiment of the present invention is shown. Figure 2 A schematic diagram of a laminated battery cell production system according to an embodiment of the present invention is shown.

[0051] The embodiment of the present invention proposes a laminated battery production system, including an anode conveying mechanism 1, an isolation film packaging mechanism 2, a lamination mechanism 8, an electrostatic mechanism 5, a cathode conveying mechanism 6, and a cathode composite mechanism 7. The anode conveying mechanism 1 can provide an anode unit 201 of a predetermined size. The isolation film packaging mechanism 2 is arranged downstream of the anode conveying mechanism 1, and the isolation film packaging mechanism 2 is used to clamp the anode unit 201 between the isolation films 10 to form a semi-encapsulated unit. The lamination mechanism 8 is arranged downstream of the isolation film packaging mechanism 2, and the lamination mechanism 8 can be connected to the isolation film 10 to stack the isolation film 10.

[0052] The electrostatic mechanism 5 is arranged upstream of the isolation film packaging mechanism 2, and the electrostatic mechanism 5 can charge the isolation film 10 to adsorb the anode unit 201. The cathode conveying mechanism 6 is arranged upstream of the lamination mechanism 8, and the cathode conveying mechanism 6 can provide a cathode unit 301 of a predetermined size to the surface of the isolation film 10 away from the anode unit 201. The cathode composite mechanism 7 is arranged downstream of the cathode conveying mechanism 6, and the isolation film 10 can pass through the cathode composite mechanism 7 to the lamination mechanism 8, and the cathode composite mechanism 7 is used to connect the cathode unit 301 to the surface of the isolation film 10 away from the anode unit 201.

[0053] It should be noted that the “upstream” and “downstream” mentioned above and below in the present invention refer to the order of production of laminated battery cells, and do not limit the spatial positions between the components.

[0054] The laminated battery cell production system provided by the embodiment of the present invention can improve the stacking efficiency, reduce the floor space, and is conducive to the production and manufacturing of laminated battery cells.

[0055] In some optional embodiments, when the laminated battery cell production system provided in the embodiment of the present invention is in use, the input end 101 of the separator 10 can be located between the anode conveying mechanism 1 and the separator packaging mechanism 2, so as to facilitate the connection between the separator 10 and the anode unit 301. Optionally, the end 102 of the separator 10 can be connected to the lamination mechanism 8 to facilitate the lamination of the separator 10.

[0056] Please also read Figure 3 , Figure 3 The structural schematic diagram of the anode conveying mechanism 1 of the embodiment of the present invention is shown. The anode conveying mechanism 1 provided by the embodiment of the present invention comprises an anode unwinding device 11, an anode cutting device 12 and an anode deflection correcting device 13, the anode unwinding device 11 can release the anode sheet 20, the anode cutting device 12 is arranged downstream of the anode unwinding device 11, the anode deflection correcting device 13 is located between the anode unwinding device 11 and the anode cutting device 12, the anode deflection correcting device 13 can receive the anode sheet 20 and adjust the anode sheet 20 to always be within the cutting range of the anode cutting device 12, and the anode cutting device 12 can receive the anode sheet 20 and cut the anode sheet 20 into a plurality of anode units 201.

[0057] In a specific implementation, the anode unwinding device 11 may include an anode unwinding roller and a driving component that drives the anode unwinding roller to perform a rotational motion. The anode sheet 20 is wound around the anode unwinding roller, and the anode sheet 20 is released by the rotation of the anode unwinding roller. The anode deviation correction device 13 may monitor in real time or at a certain time interval whether the anode sheet 20 is within the predetermined range of the anode deviation correction device 13 through a detection device. If not, the position of the anode sheet 20 needs to be adjusted to ensure that the anode sheet 20 is always within the cutting range of the anode cutting device 12. The anode cutting device 12 may be laser cutting or metal tool cutting. If a metal tool is used for cutting, a cam mechanism may be designed to ensure its cutting efficiency by the continuous rotation of the motor.

[0058] At the same time, in order to facilitate the anode sheet 20 to be transported to the anode cutting device 12 at a uniform speed and conveniently, optionally, an anode driving wheel 14 is further provided between the anode deflection correction device 13 and the anode cutting device 12, and the anode driving wheel 14 can be driven by a motor to provide power for the movement of the anode sheet 20. In addition, in order to enable the anode sheet 20 to be transported to the anode cutting device 12 according to a predetermined trajectory, an anode guide roller 15 is provided between the anode unwinding device 11 and the anode deflection correction device 13 and between the anode deflection correction device 13 and the anode cutting device 12, respectively, and the walking route of the anode sheet 20 is changed by the anode guide roller 15 to meet the production requirements of the anode unit 201.

[0059] Please continue reading Figures 1 to 3 , the lamination system provided by the embodiment of the present invention further includes a dust removal mechanism 4, and the dust removal mechanism 4 may include a belt brush 41 and a dust suction device 42. In order to facilitate the dust removal of the cut anode unit 201, optionally, a dust removal mechanism 4 is provided between the anode conveying mechanism 1 and the isolation film packaging mechanism 2 to receive and clean the anode unit 201. Specifically, one end of the dust removal mechanism 4 faces the anode cutting device 12, and the other end faces the isolation film packaging mechanism 2. The dust removal mechanism 4 is specifically located upstream of the input end 101 of the isolation film 10. The anode unit 201 cut by the anode cutting device 12 falls to the belt brush 41 of the dust removal mechanism 4. The belt brush 41 can transport the anode sheet 20 to the direction of the isolation film packaging mechanism 2 and connect it to the isolation film 10. During transportation, the dust on the anode unit 201 can be peeled off by the belt brush 41 and sucked and recovered by the dust suction device 42, ensuring the cleanliness of the anode unit 201 connected to the isolation membrane 10, so that the produced laminated battery cells can better meet their electrical requirements.

[0060] As an optional embodiment, the stacked battery cell production system provided in an embodiment of the present invention further includes an isolation film conveying mechanism 3, which is arranged between the anode conveying mechanism 1 and the isolation film packaging mechanism 2, and is further located between the anode cutting device 12 and the isolation film packaging mechanism 2. When the stacked battery cell production system includes a dust removal mechanism 4 for removing dust from the anode unit 201, the isolation film conveying mechanism 3 is located downstream of the dust removal mechanism 4. The isolation film conveying mechanism 3 includes at least one group of isolation film conveying devices 31 used in pairs. In some optional examples, each isolation film conveying device 31 can release the isolation film 10.

[0061] In some optional examples, the isolation film conveying mechanism 3 provided by the embodiment of the present invention may include a group of isolation film conveying devices 31 arranged in pairs, and the two isolation film conveying devices 31 in a pair are relatively arranged on both sides of the isolation film packaging mechanism 2. Each isolation film conveying device 31 includes an isolation film unwinding roller and a driving component for driving the isolation film unwinding roller to perform a rotary motion, and the isolation film 10 is wound on the isolation film unwinding roller, and the isolation film 10 is released by the rotation of the isolation film unwinding roller.

[0062] In order to make the anode unit 201 better attached to the separator 10, the electrostatic mechanism 5 is optionally arranged close to the separator 10. When the laminated battery production system includes a dust removal mechanism 4 for removing dust from the anode, the electrostatic mechanism 5 can be specifically arranged between the dust removal mechanism 4 and the input end 101 of the separator 10. Since the separator 10 on the side close to the anode sheet 20 is made of PE material, it can be charged. The charge is released to the separator 10 through the electrostatic mechanism 5 to make it carry static electricity, and the purpose of adhering the anode unit 201 can be better achieved when the anode unit 201 is sent to the separator 10.

[0063] Please also read Figure 4 , Figure 4 The schematic diagram of the structure of the isolation film packaging mechanism 2 of one embodiment of the present invention is shown. Optionally, the isolation film packaging mechanism 2 includes a guiding device 22 and a heat sealing device 21, and the heat sealing device 21 can press the two isolation films 10. Optionally, the two isolation films 10 can be released by any isolation film conveying device 31 used in pairs. The heat sealing device 21 has a heat sealing head 212, and the heat sealing head 212 heat seals the two isolation films 10 at a preset interval, so that in the formed semi-encapsulated unit, the anode unit 201 is fixedly clamped between the two isolation films 10.

[0064] By providing the isolation film packaging mechanism 2 and limiting it to include the above structure, the anode unit 201 can be better sealed inside the two isolation films 10, so as to achieve the purpose of preventing the anode unit 201 from moving during the movement. Even if the static electricity will gradually disappear over time, the position of the anode sheet 20 can be guaranteed, providing double insurance for the position of the anode unit 201.

[0065] Optionally, the guide device 22 may include multiple groups of guide roller groups 221, and the multiple groups of guide roller groups 221 are arranged at intervals. In some optional embodiments, the multiple groups of guide roller groups 221 may be arranged at intervals along the arrangement direction of the separator conveying mechanism 3 and the cathode composite mechanism 7. The number of guide roller groups 221 may be determined according to the production line requirements, as long as the guide function of the separator 10 clamped with the anode unit 201 can be satisfied during transportation. Each group of guide roller groups 221 includes clamping rollers used in pairs and clamping and conveying the separator 10 together. The heat sealing device 21 is arranged between any two groups of guide roller groups 221. Of course, in some other examples, the heat sealing device 21 may also be arranged upstream of the guide device 22, such as between the input end 101 of the separator and the guide device 22, or the heat sealing device 21 may also be arranged downstream of the guide device 22, such as between the guide device 22 and the cathode conveying mechanism 6, or between the cathode composite mechanism 7 and the lamination mechanism 8. Through the above arrangement, the transportation of the semi-encapsulated unit can be better satisfied, and the relative position of the anode unit 201 and the isolation membrane 10 can be better fixed.

[0066] In some optional examples, the heat sealing device 21 includes heat sealing rollers 211 used in pairs, and each heat sealing roller 211 is provided with a heat sealing head 212 on its outer peripheral surface, and the end of the heat sealing head 212 away from the heat sealing roller 211 can be pointed, and the two heat sealing rollers 211 used in pairs can rotate synchronously and the respective heat sealing heads 212 can dock with each other during the rotation of the heat sealing roller 211, and the two heat sealing rollers 211 used in pairs can be driven by a servo motor. The heat sealing device 21 adopts this form, which has a simple structure, is easy to control, and can meet the packaging requirements between the anode unit 201 and the isolation membrane 10.

[0067] Please also read Figure 5 , Figure 5The schematic diagram of the structure of the cathode conveying mechanism 6 of the embodiment of the present invention is shown. The laminated battery cell production system provided by the embodiment of the present invention, wherein the cathode conveying mechanism 6 includes a cathode unwinding device 61, a cathode cutting device 62 and a cathode deflection correcting device 63, wherein the cathode unwinding device 61 can release the cathode sheet 30, the cathode cutting device 62 is arranged downstream of the cathode unwinding device 61, and the cathode deflection correcting device 63 is arranged between the cathode unwinding device 61 and the cathode cutting device 62. The cathode deflection correcting device 63 can receive the cathode sheet 30 and adjust the cathode sheet 30 to always be within the cutting range of the cathode cutting device 62, and the cathode cutting device 62 receives the cathode sheet 30 and cuts the cathode sheet 30 into a plurality of cathode units 301.

[0068] In a specific implementation, the cathode unwinding device 61 may include a cathode unwinding roller and a driving component that drives the cathode unwinding roller to perform a rotary motion. The cathode sheet 30 is wound on the cathode unwinding roller, and the cathode sheet 30 is released by the rotation of the cathode unwinding roller. The cathode deflection correction device 63 may monitor in real time or at a certain time interval whether the cathode sheet 30 is within the predetermined range of the cathode deflection correction device 63 through a detection device. If not, the position of the cathode sheet 30 needs to be adjusted to ensure that the cathode sheet 30 is always within the cutting range of the cathode cutting device 62. The cathode cutting device 62 may also be laser cutting or metal tool cutting. If a metal tool is used for cutting, a cam mechanism may be designed to ensure its cutting efficiency by the continuous rotation of the motor.

[0069] At the same time, in order to facilitate the uniform and convenient transportation of the cathode sheet 30 to the cathode cutting device 62, optionally, a cathode driving wheel 64 is further provided between the cathode deflection correction device 63 and the cathode cutting device 62, and the cathode driving wheel 64 can be driven by a motor to provide power for the movement of the cathode sheet 30. In addition, in order to enable the cathode sheet 30 to be transported to the cathode cutting device 62 according to a predetermined trajectory, cathode guide rollers 65 are respectively provided between the cathode unwinding device 61 and the cathode deflection correction device 63 and between the cathode deflection correction device 63 and the cathode cutting device 62, and the travel route of the cathode sheet 30 is changed by the cathode guide rollers 65 to meet the production requirements of the cathode unit 301.

[0070] Optionally, in order to facilitate dust removal of the cathode unit 301 formed by cutting, a dust removal mechanism 4 is optionally provided between the cathode conveying mechanism 6 and the cathode composite mechanism 7 to receive and clean the cathode unit 301. Specifically, one end of the dust removal mechanism 4 faces the cathode cutting device 62, and the other end faces the cathode composite mechanism 7. The cathode unit 301 cut by the cathode cutting device 62 falls to the belt brush 41 of the dust removal mechanism 4, and the cathode sheet 30 can be transported to the direction of the cathode composite mechanism 7 and connected to the isolation film 10 through the belt brush 41. In the process of transportation, the dust on the cathode unit 301 can also be peeled off by the belt brush 41 and sucked and recovered by the dust suction device 42, so as to ensure the cleanliness of the cathode unit 301 connected to the isolation film 10, and also enable the produced laminated battery cells to better meet their electrical requirements.

[0071] As an optional embodiment, in order to better meet the formation of stacked battery cells, the cathode conveying mechanism 6 can be used in pairs. As an optional embodiment, the stacked battery cell production system may include a pair of cathode conveying mechanisms 6, that is, two cathode conveying mechanisms 6. The two cathode conveying mechanisms 6 can be arranged relative to each other. For example, they can be distributed on both sides of the isolation membrane 10 as shown in the above examples and staggered in the extension direction of the isolation membrane 10, so that the two cathode units 301 transported to the semi-encapsulated unit by the two cathode conveying mechanisms 6 are staggered.

[0072] Please also read Figure 6 , Figure 6 FIG. 2 shows a schematic diagram of a laminated battery production system according to another embodiment of the present invention. Figure 6 As shown, in some other examples, the two cathode conveying mechanisms 6 can also be symmetrically arranged on both sides of the isolation membrane 10, so that the two cathode units 301 transported to the semi-encapsulated unit by the two cathode conveying mechanisms 6 are symmetrical to each other to meet the setting requirements of laminated battery cells with different structural forms.

[0073] Please also read Figure 7 , Figure 7 The schematic diagram of the structure of the cathode composite mechanism 7 of the embodiment of the present invention is shown. The cathode composite mechanism 7 provided by the embodiment of the present invention includes a hot pressing plate group 71 arranged downstream of the cathode conveying mechanism 6, and the hot pressing plate group 71 includes a first hot pressing plate 711 and a second hot pressing plate 712 arranged opposite to each other. A gap 713 is formed between the first hot pressing plate 711 and the second hot pressing plate 712 for the separation film 10 connected to the anode unit 201 and the cathode unit 301 to pass through. Because the cathode sheet 30 carries PVDF adhesive, and the corresponding separation film 10 also comes with PVDF adhesive, therefore, by setting the hot pressing plate group 71, the cathode unit 301 can be bonded to the separation film 10 by the principle of heating and rolling, so as to achieve the purpose of sheeting.

[0074] As an optional embodiment, the cathode composite mechanism 7 further includes a protective component 72 disposed downstream of the cathode conveying mechanism 6, and the first hot pressing plate 711 and the second hot pressing plate 712 are respectively provided with a protective component 72, and the protective component 72 includes a protective belt 721 and a guide wheel 722 that cooperates with the protective belt 721 in transmission, and the protective belt 721 of each protective component 72 at least partially extends into the gap 713. By providing the protective component 72, the cathode unit 301 can be protected on the basis of ensuring the heat packaging requirements between the hot pressing plate group 71 and the isolation film 10, so as to avoid the hot pressing plate group 71 directly contacting the cathode unit 301 and causing damage to the cathode unit 301.

[0075] Further, in order to ensure that the relative positions of the semi-encapsulated unit connected to the cathode unit 301 can be kept stable when being transported to the hot plate group 71, the cathode composite mechanism 7 further includes a clamping guide device 73, which is located upstream of the hot plate group 71. The clamping guide device 22 may include a traction roller 731 and a traction belt 732 that cooperates with the traction roller 731 to realize the transportation of the cathode unit 301 and the semi-encapsulated unit.

[0076] The stacking mechanism 8 is used to stack the isolation membrane 10 in a strip structure with the anode unit 201 sandwiched in the middle and the cathode unit 301 adhered to the surface, so that the cathode unit 301 and the anode unit 201 are alternately separated by the isolation membrane 10 to form a stacked battery cell.

[0077] Please also read Figure 8 , Figure 8 The schematic diagram of the structure of the laminated cell production system of another embodiment of the present invention is shown. It can be understood that the above embodiments are all illustrated by taking the number of anode conveying mechanisms 1 as an example. In some other examples, the number of anode conveying mechanisms 1 can also be more than two, wherein two anode conveying mechanisms 1 are arranged opposite to each other. In a specific implementation, two anode conveying mechanisms 1 can be included, and the two anode conveying mechanisms 1 are arranged opposite to each other in the thickness direction of the separator 10 to alternately provide anode units 201 to the two separators 10 of the same group.

[0078] Optionally, when there are more than two anode conveying mechanisms 1, an even number may be used, with every two anode conveying mechanisms 1 forming a group. Multiple groups of anode conveying mechanisms 1 may be arranged at intervals in the width direction of the separator 10, and each group of anode conveying mechanisms 1 may be used to provide anode units 201 to two separators 10 of different groups, that is, one group of anode conveying mechanisms 1 may be used to provide anode units 201 to one group of separators 10. By setting the number of anode conveying mechanisms 1 to more than two, the stacking efficiency of the battery cell can be further improved. In a specific implementation, each anode conveying mechanism 1 may be provided with a dust removal mechanism 4 to meet the dust removal requirements of each anode unit 201.

[0079] Please also read Fig. 9 as well as Fig.10 , Fig. 9 A schematic structural diagram of a laminated battery cell production system according to another embodiment of the present invention is shown. Fig.10 Shows Fig. 9 The structure of the guide device 22 in the laminated battery production system provided by the embodiment of the present invention is not limited to the above embodiments. In some optional examples, such as Fig. 9 , Fig.10 As shown, the guide device 22 may also include transmission components 23 used in pairs, each set of transmission components 23 includes a transmission wheel 231 and a transmission belt 232 that cooperates with the transmission wheel 231, and the transmission belts 232 of each pair of transmission components 23 are at least partially arranged in parallel with each other and jointly clamp and transport the isolation film 10. Similarly, in this example, the heat sealing device 21 mentioned in the above embodiments can be arranged upstream and downstream of the guide device 22. The setting position of the heat sealing device 21 can also refer to the introduction of the above embodiments, and can also meet the packaging requirements between the isolation film 10 and the anode unit 201, which will not be repeated here.

[0080] Please also read Figures 11 to 13 , Fig.11 A schematic structural diagram of a heat sealing device 21 according to another embodiment of the present invention is shown. Fig.12 FIG. 1 is a schematic diagram showing the structure of a packaging component according to an embodiment of the present invention. Fig.13 Shows Fig.11 The working principle diagram of the heat sealing device 21 is shown.

[0081] It can be understood that the heat sealing device 21 of the laminated battery cell production system mentioned in the above embodiments of the present invention is not limited to the structural form of the heat sealing rollers 211 used in pairs mentioned in the above embodiments.

[0082] In some optional examples, the heat sealing device 21 can also be used as follows Figures 11 to 13 The structural form shown.

[0083] The heat sealing device 21 may include a packaging component 214 and a guide component 213 having a predetermined length and width, and the packaging component 214 is arranged on the guide component 213. The packaging component 214 includes a base 2141 and a heat sealing assembly 2142 connected to the base 2141, the base 2141 is connected to the guide component 213 and can move along the length direction X of the guide component 213, and the heat sealing assembly 2142 includes two heat sealing heads 212 respectively connected to the base 2141, and the two heat sealing heads 212 are arranged opposite to each other in the height direction Y of the guide component 213 and leave a heat sealing gap 2143 for the isolation film 10 connected to the anode unit 201 to pass through, and at least one of the two heat sealing heads 212 is connected to a flexible heat conductive pad 2144, and the flexible heat conductive pad 2144 is located in the heat sealing gap 2143. In specific implementation, the heat sealing head 212 in this example can adopt a block structure that can be heated by power.

[0084] The heat sealing device 21 adopts the above structure, and can package the separator 10 holding the anode unit 201. The structure is simple, and it is not easy to cause damage to the anode unit 201, thereby improving the yield rate of the laminated battery cell.

[0085] In some optional embodiments, the thickness of the flexible thermal pad 2144 is any value between 3 mm and 10 mm, including the two end values ​​of 3 mm and 10 mm. By adopting the above values, the thermal conductivity requirements can be met and the packaging effect can be ensured, and the deformation of the flexible thermal pad 2144 can be better utilized to make the isolation films 10 arranged in pairs better bonded to each other.

[0086] As an optional embodiment, the packaging component 214 further includes a lifting assembly 2145, the lifting assembly 2145 includes a telescopic cylinder 2145a that can be extended and retracted along the height direction Y and an adapter plate 2145b, one of the cylinder body and the cylinder rod of the telescopic cylinder 2145a is connected to the base 2141 and the other is connected to the adapter plate 2145b, and one of the heat sealing heads 212 is connected to the adapter plate 2145b.

[0087] By setting the lifting assembly 2145 and limiting the connection relationship between one of the heat sealing heads 212 and the corresponding components in the lifting assembly 2145, the size of the heat sealing gap 2143 formed between the two heat sealing heads 212 arranged opposite to each other can be adjusted, so that the packaging equipment can be used for the packaging requirements of the semi-encapsulated structure composed of the isolation membrane 10 with different thicknesses and the anode unit 301. At the same time, after the packaging component 214 is completed to encapsulate a part of the isolation membrane 10, it can return to the initial position for recycling according to the extension track of the guide rail, and when the packaging component 214 returns, the heat sealing gap 2143 can be adjusted by the telescopic cylinder 2145a, so that the heat sealing gap 2143 becomes larger, thereby ensuring that when the packaging component 214 returns to the initial position according to the extension track of the guide rail, it will not interfere with the isolation membrane 10, and further ensure the packaging effect.

[0088] In summary, the laminated battery production system provided by the embodiment of the present invention can provide the anode unit 201 through the anode conveying mechanism 1, and can clamp the anode unit 201 between the separators 10 through the separator packaging mechanism 2. The cathode conveying mechanism 6 can provide the cathode unit 301 of a predetermined size to the side of the separator 10 away from the anode unit 201, and the cathode composite mechanism 7 is arranged downstream of the cathode conveying mechanism 6. The separator 10 passes through the cathode composite mechanism 7 to the laminating mechanism 8, so that the cathode composite mechanism 7 can receive the cathode unit 301 and connect the cathode unit 301 to the surface of the separator 10 away from the anode unit 201. The end 102 of the separator 10 is connected to the laminating mechanism 8, and the separator 10 connected with the anode unit 201 and the cathode unit 301 can be directly and continuously stacked through the laminating mechanism 8 to form a laminated battery, with high laminating efficiency and a small footprint for the entire laminated battery production system. At the same time, the correspondingly arranged electrostatic mechanism 5 enables the anode unit 201 provided by the anode conveying mechanism 1 to be directly attached to the isolation membrane 10 under the action of static electricity, and the stacking mechanism can meet the stacking requirements without reciprocating transfer, thereby further improving the stacking efficiency, and the correspondingly arranged isolation membrane packaging structure 2 can be combined with the electrostatic mechanism 5 to achieve double positioning of the relative position of the anode unit 201 and the isolation membrane 10, so that the positioning is more accurate and more conducive to the production and manufacturing of battery cells, so it is easy to promote and use.

[0089] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A laminated battery cell production system, characterized in that: include: an anode conveying mechanism capable of providing anode units of predetermined sizes, the anode conveying mechanism comprising an anode unwinding device and an anode cutting device, wherein the anode unwinding device is capable of releasing an anode sheet, and the anode cutting device is disposed downstream of the anode unwinding device, and the anode cutting device is capable of receiving the anode sheet and cutting the anode sheet into a plurality of anode units; A separator packaging mechanism, disposed downstream of the anode conveying mechanism, the separator packaging mechanism is used to clamp the anode unit between separators; A lamination mechanism, disposed downstream of the isolation film packaging mechanism, the lamination mechanism being connectable to the isolation film to stack the isolation film; An electrostatic mechanism, disposed upstream of the isolation film packaging mechanism, the electrostatic mechanism being capable of charging the isolation film to adsorb the anode unit; a cathode conveying mechanism, arranged upstream of the lamination mechanism, the cathode conveying mechanism being capable of providing cathode units of a predetermined size; The cathode composite mechanism is arranged downstream of the cathode conveying mechanism, the isolation membrane can pass through the cathode composite mechanism to the lamination mechanism, and the cathode composite mechanism is used to connect the cathode unit to the surface of the isolation membrane away from the anode unit.

2. The laminated battery core production system according to claim 1, characterized in that: The laminated battery core production system further includes a dust removal mechanism; The dust removal mechanism is arranged between the anode conveying mechanism and the isolation film packaging mechanism to clean the anode unit; and / or the dust removal mechanism is arranged between the cathode conveying mechanism and the cathode composite mechanism to clean the cathode unit.

3. The laminated battery core production system according to claim 2, characterized in that: The dust removal mechanism includes a belt brush and a dust suction device. The belt brush can transport the anode unit or the cathode unit and can peel off the dust on the anode unit or the cathode unit. The dust suction device sucks and recovers the dust.

4. The laminated battery core production system according to claim 1, characterized in that: The number of the cathode conveying mechanisms is more than two, and any two of the cathode conveying mechanisms are relatively arranged on two sides of the isolation film packaging mechanism; And / or, the number of the anode transport mechanisms is more than two, and any two of the anode transport mechanisms are arranged relative to each other.

5. The laminated battery core production system according to any one of claims 1 to 4, characterized in that: The laminated battery cell production system further includes a separator conveying mechanism, which is disposed between the anode conveying mechanism and the separator packaging mechanism, and includes at least one group of separator conveying devices used in pairs.

6. The laminated battery core production system according to any one of claims 1 to 4, characterized in that: The isolation film packaging mechanism includes a guiding device and a heat sealing device, wherein the guiding device can receive the two isolation films, and the heat sealing device has a heat sealing head, which can heat seal the two isolation films at a preset interval so that the anode unit is fixedly clamped between the two isolation films.

7. The laminated battery core production system according to claim 6, characterized in that: The heat sealing device comprises heat sealing rollers used in pairs, the heat sealing heads are arranged on the outer peripheral surfaces of the heat sealing rollers, the two heat sealing rollers used in pairs can rotate synchronously and the respective heat sealing heads can dock with each other during the rotation of the heat sealing rollers.

8. The laminated battery cell production system according to claim 6, characterized in that: The heat sealing device comprises a packaging component and a guiding component, wherein the packaging component is arranged on the guiding component; The packaging component includes a base and a heat sealing assembly connected to the base, the base is connected to the guide component, and the base can move along the length direction of the guide component; The heat sealing assembly includes two heat sealing heads connected to the base, the two heat sealing heads are arranged opposite to each other in the height direction of the guide component and leave a heat sealing gap for the isolation membrane connected to the anode unit to pass through, and at least one of the two heat sealing heads is connected to a flexible thermally conductive pad, and the flexible thermally conductive pad is located in the heat sealing gap.

9. The laminated battery core production system according to claim 6, characterized in that: The guiding device is arranged between the anode conveying mechanism and the cathode conveying mechanism; The guiding device comprises a plurality of guiding roller groups, the plurality of guiding roller groups are arranged at intervals, each guiding roller group comprises a pair of clamping rollers, the clamping rollers are used to clamp and transport the isolation film, and the heat sealing device is arranged upstream, downstream or between any two guiding roller groups of the guiding device; Alternatively, the guiding device includes transmission assemblies used in pairs, each group of the transmission assemblies includes a transmission wheel and a transmission belt that cooperates with the transmission wheel, the transmission belts of the two transmission assemblies in the same pair are at least partially arranged in parallel with each other and jointly clamp and transport the isolation film, and the heat sealing device is arranged upstream or downstream of the guiding device.

10. The laminated battery core production system according to any one of claims 1 to 4, characterized in that: The cathode composite mechanism includes a hot press plate group arranged downstream of the cathode conveying mechanism, and the hot press plate group includes a first hot press plate and a second hot press plate arranged opposite to each other, and a gap is formed between the first hot press plate and the second hot press plate for the isolation membrane connected to the anode unit and the cathode unit to pass through.

11. The laminated battery core production system according to claim 10, characterized in that: The cathode composite mechanism further includes a protective component arranged downstream of the cathode conveying mechanism, and the first hot pressing plate and the second hot pressing plate are respectively provided with the protective components, and the protective component includes a protective belt and a guide wheel that cooperates with the protective belt for transmission, and the protective belt of each protective component at least partially extends into the gap.

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