Solid electrolyte preheating device and rolling transfer printing equipment

Abstract

The utility model discloses a solid electrolyte preheating device and rolling transfer printing equipment, and relates to the technical field of solid-state battery manufacturing. The solid electrolyte preheating device comprises a first preheating unit, the first preheating unit is configured to be capable of heating a composite material belt located at the input end of the rolling device, and the first preheating unit comprises a plurality of sets of first thermal medium guiding-out mechanisms and a plurality of sets of second thermal medium guiding-out mechanisms. The first thermal medium guiding-out mechanism and the second thermal medium guiding-out mechanism are each provided with a thermal medium output end, and the thermal medium output ends are configured to be capable of being arranged towards the solid electrolyte layer in the composite material belt so that a heating area used for heating the outer surface of the solid electrolyte layer can be formed. According to the utility model, a solid electrolyte layer with good uniformity can be quickly formed on the surface of the pole piece, and the quality of a solid-state battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of solid-state battery manufacturing, and particularly relates to a solid-state electrolyte preheating device and a roll pressing and transfer printing device. Background Art

[0002] Compared with liquid batteries, solid-state batteries are a new type of battery that uses solid electrodes and solid electrolytes. Since solid-state batteries use solid electrolytes to replace electrolytes, they have the advantages of high energy density, safety, and durability, and are regarded as ideal batteries for electric vehicles.

[0003] In the manufacturing process of solid-state batteries, a solid-state electrolyte layer needs to be formed on the surface of the electrode sheet. Since the solid-state electrolyte layer does not have support, the existing methods for forming the solid-state electrolyte layer on the electrode sheet usually spray electrolyte powder on the surface of the electrode sheet by spraying. However, when using this method, the electrolyte powder easily causes blockage of the coating slit of the spraying mechanism, resulting in low uniformity and slow formation speed of the solid-state electrolyte layer on the surface of the electrode sheet. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a solid-state electrolyte preheating device and a roll pressing and transfer printing device, which can quickly form a solid-state electrolyte layer with good uniformity on the surface of the electrode sheet and improve the quality of solid-state batteries.

[0005] The first aspect embodiment of the utility model provides a solid-state electrolyte preheating device, which includes a first preheating unit configured to heat a composite tape located at the input end of a roll pressing device. The first preheating unit includes a first heat medium guiding mechanism and a second heat medium guiding mechanism. There are several groups of the second heat medium guiding mechanisms. Both the first heat medium guiding mechanism and the second heat medium guiding mechanism have heat medium output ends, and the heat medium output ends are configured to face the solid-state electrolyte layer in the composite tape to form a heating zone for heating the outer surface of the solid-state electrolyte layer.

[0006] The solid electrolyte preheating device according to the first aspect embodiment of the present utility model has at least the following beneficial effects: A solid electrolyte preheating device is provided in front of the input end of the rolling device, and the first preheating unit of the solid electrolyte preheating device preheats the solid electrolyte layer in the composite tape. During the preheating process, the first heat medium guiding mechanism can heat the surface of the solid electrolyte layer connected to the pole piece tape, and several groups of second heat medium guiding mechanisms can cooperate with the first heat medium guiding mechanism to jointly heat the solid electrolyte layer, so that the solid electrolyte layer is easily detached and quickly transferred to the surface of the pole piece tape during the rolling process. In this way, the forming speed and forming effect of the solid electrolyte layer on the pole piece tape can be improved, thereby enhancing the quality of the solid-state battery. At the same time, the problems that the solid electrolyte layer cannot be rolled in the form of a tape due to poor supportability and the low forming efficiency and poor uniformity of the solid electrolyte layer caused by the method of spraying electrolyte powder are solved.

[0007] In some embodiments of the present utility model, two first preheating units are provided and arranged at intervals to respectively heat the solid electrolyte layers in two composite tapes.

[0008] In some embodiments of the present utility model, the first heat medium guiding mechanism is a first infrared heater, the second heat medium guiding mechanisms are distributed around the first heat medium guiding mechanism, and the second heat medium guiding mechanism is a reflector or a first infrared heater.

[0009] In some embodiments of the present utility model, the solid electrolyte preheating device further includes a second preheating unit, and the second preheating unit is configured to be able to heat the solid electrolyte forming surface of the pole piece tape located at the input end of the rolling device.

[0010] In some embodiments of the present utility model, the second preheating unit includes a second infrared heater, and the irradiation direction of the second infrared heater is configured to be perpendicular to the solid electrolyte forming surface of the pole piece tape.

[0011] In some embodiments of the present utility model, two first preheating units are provided and arranged at intervals to respectively heat the solid electrolyte layers in two composite tapes, and two second preheating units are provided and arranged oppositely to form a preheating channel for the pole piece tape to pass through.

[0012] The second aspect embodiment of the present utility model provides a rolling and transfer printing device, which includes:

[0013] A rolling device having a rolling channel, and the rolling channel is configured to be able to roll the pole piece tape and the composite tape so that the solid electrolyte layer in the composite tape is transferred to the pole piece tape. The two opposite ends of the rolling channel are respectively an input end and an output end;

[0014] The solid electrolyte preheating device as described in the embodiment of the first aspect is arranged near the input end of the rolling device.

[0015] The rolling and transfer printing equipment according to the embodiment of the second aspect of the present invention has at least the following beneficial effects: Before the composite tape enters the rolling channel of the rolling device following the pole piece tape, the solid electrolyte layer of the composite tape is preheated by the solid electrolyte preheating device, so that the solid electrolyte layer is easy to detach during rolling and quickly adheres to the surface of the pole piece tape, thereby improving the formation speed and uniformity of the solid electrolyte layer on the pole piece tape, which is beneficial to improving the manufacturing quality of the solid-state battery.

[0016] In some embodiments of the present invention, the rolling and transfer printing equipment further includes:

[0017] A first unwinding device configured to unwind a pole piece tape towards the input end of the rolling device;

[0018] A second unwinding device configured to unwind a composite tape towards the input end of the rolling device, wherein the composite tape includes an isolation film tape and a solid electrolyte layer;

[0019] A first winding device configured to wind up the composite pole piece tape output from the output end of the rolling device, wherein the composite pole piece tape includes a pole piece tape and a solid electrolyte layer;

[0020] A second winding device configured to wind up the isolation film tape output from the output end of the rolling device.

[0021] In some embodiments of the present invention, two second unwinding devices are provided to unwind the composite tape on opposite sides of the pole piece tape; two second winding devices are provided to wind up the isolation film tapes located on opposite sides of the composite pole piece tape.

[0022] In some embodiments of the present invention, the rolling device includes two pressure rollers, the two pressure rollers are arranged opposite to each other and form the rolling channel, at least one of the pressure rollers is provided with a peripheral flow channel, a heat flow input channel and a heat flow output channel, a plurality of the peripheral flow channels are provided and distributed circumferentially around the pressure roller, one end of the peripheral flow channel is communicated with the heat flow input channel, and the other end is communicated with the heat flow output channel.

[0023] Other features and advantages of the present invention will be described in the following description, and part of them will become obvious from the description, or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures specifically pointed out in the description, claims and drawings. Description of the Drawings

[0024] Figure 1 It is a structural schematic diagram of a roller transfer device provided according to an embodiment of the second aspect of the utility model;

[0025] Figure 2 It is a structural schematic diagram of a solid electrolyte preheating device provided according to an embodiment of the first aspect of the utility model, in which a first preheating unit heats a solid electrolyte layer in a composite material strip;

[0026] Figure 3 It is a structural schematic diagram of a roller pressing device in a roller pressing transfer device provided in an embodiment of the second aspect of the utility model, in which the roller pressing device adopts a horizontal design;

[0027] Figure 4 It is a structural schematic diagram of a roller pressing device in a roller pressing transfer device provided in an embodiment of the second aspect of the utility model, in which a roller pressing device adopts a vertical design;

[0028] Figure 5 It is a cross-sectional schematic diagram of a pressure roller of a roller pressing device in a roller pressing transfer device provided in an embodiment of the second aspect of the utility model;

[0029] Figure 6 is a structural schematic diagram of a roller transfer device provided according to another embodiment of the second aspect of the utility model;

[0030] Figure 7 It is a structural schematic diagram of a solid electrolyte preheating device provided according to an embodiment of the first aspect of the utility model.

[0031] Reference numerals: 110, first unwinding device; 120, first winding device; 210, second unwinding device; 220, second winding device; 300, solid electrolyte preheating device; 310, second preheating unit; 320, first preheating unit; 321, first heat medium outlet mechanism; 322, second heat medium outlet mechanism; 323, center irradiation area; 324, edge irradiation area; 400, rolling device; 410, rolling assembly ; 411, pressure roller; 412, drive motor; 413, mounting plate; 414, first interface; 415, second interface; 416, heat flow input channel; 417, heat flow output channel; 418, peripheral channel; 419, branch channel; 420, mounting seat; 430, position adjustment mechanism; 500, pole piece strip; 600, composite strip; 610, isolation membrane strip; 620, solid electrolyte layer; 700, defect detection device. DETAILED DESCRIPTION

[0032] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where 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 with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0033] In the description of the present utility model, it should be understood that features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0034] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "connected" and "connected to" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0035] In the field of batteries, compared with liquid batteries, solid-state batteries are a new type of battery that uses solid electrodes and solid electrolytes. Since solid-state lithium metal batteries use solid electrolytes to replace the separators and liquid electrolytes used in traditional lithium-ion batteries, the graphite anodes or silicon anodes in traditional lithium-ion batteries can be replaced by lithium metal anodes. The lithium metal anode has a higher energy density than traditional anodes, allowing solid-state batteries to store more energy in the same volume, making solid-state batteries have a high energy density, be safe and durable, so that they are regarded as ideal batteries for electric vehicles.

[0036] Currently, in the manufacturing process of solid-state batteries, a solid electrolyte layer needs to be formed on the surface of the electrode sheet. In the structure of a solid-state battery cell, the solid electrolyte layer is located between the positive electrode sheet and the negative electrode sheet. Since the solid electrolyte layer has no support, therefore, the existing formation methods for the solid electrolyte layer on the electrode sheet usually spray electrolyte powder on the surface of the electrode sheet by spraying. However, when using this method to manufacture the solid electrolyte layer on the surface of the electrode sheet, the electrolyte powder easily causes the coating slit of the spraying mechanism to be blocked, resulting in poor uniformity of the formation of the solid electrolyte layer on the surface of the electrode sheet. Moreover, the formation speed of the solid electrolyte layer is slow, which seriously affects the manufacturing quality of solid-state batteries.

[0037] Based on the above problems, the present utility model provides a solid electrolyte preheating device and a roll pressing and transfer printing device, which can be applied to the manufacturing process of solid-state battery cores, and can quickly form a solid electrolyte layer with good uniformity on the surface of the electrode sheet, thereby facilitating the improvement of the quality of solid-state batteries.

[0038] The following refers to Figures 1 to 7 Describe the solid electrolyte preheating device and the roll pressing and transfer printing device provided according to the embodiments of the present utility model.

[0039] As Figure 1 、 Figure 2 、 Figure 6 and Figure 7 As shown, the solid electrolyte preheating device 300 according to the first aspect embodiment of the present utility model can be used in conjunction with the roll pressing device 400, and can preheat the solid electrolyte layer 620 in the composite tape 600 to be roll pressed, so that when the composite tape 600 and the electrode sheet tape 500 are roll pressed later, the solid electrolyte layer 620 in the composite tape 600 is formed on the surface of the electrode sheet tape 500 by transfer printing.

[0040] It can be understood that the composite tape 600 includes a carrier film tape and a solid electrolyte layer 620. There are multiple solid electrolyte layers 620, which are arranged at a certain interval along the extension direction of the carrier film tape. The carrier film tape can be an isolation film tape 610 or a foil material tape. The carrier film tape with the solid electrolyte layer 620 can be set in the form of a tape roll, and through the unwinding operation, the long carrier film tape can carry the solid electrolyte layer 620 and enter the roll pressing device 400 together with the electrode sheet tape 500 for roll pressing and transfer printing work. In this embodiment, the carrier film tape is the isolation film tape 610.

[0041] The electrode sheet tape 500 can be a negative electrode sheet tape 500 or a positive electrode sheet tape 500. The electrode sheet tape 500 is released in the form of a tape roll so that the long electrode sheet tape 500 can enter the roll pressing device 400. After the solid electrolyte layer 620 in the composite tape 600 is transferred to the electrode sheet tape 500, the electrode sheet tape 500 and the solid electrolyte layer 620 together form a composite electrode sheet tape, so that after subsequent cutting into pieces, it can be laminated with other electrode sheets to form a solid-state battery core.

[0042] The solid-state electrolyte preheating device 300 includes a first preheating unit 320. The first preheating unit 320 is configured to heat the composite tape 600 at the input end of the rolling device 400, mainly for heating the outer surface of the solid-state electrolyte layer 620 in the composite tape 600, so as to increase the temperature of the solid-state electrolyte layer 620, so that the solid-state electrolyte layer 620 is easily separated from the carrier film tape during the rolling process and easily adheres to the surface of the electrode tape 500. The first preheating unit 320 has a first preheating station. When the composite tape 600 moves to the first preheating station, the first preheating unit 320 can heat the solid-state electrolyte layer 620 in the composite tape 600.

[0043] The structure of the first preheating unit 320 includes a first heat medium guiding mechanism 321 and a second heat medium guiding mechanism 322. Among them, there are several groups of the second heat medium guiding mechanisms 322, and several groups of the second heat medium guiding mechanisms 322 are distributed around the first heat medium guiding mechanism 321. Moreover, both the first heat medium guiding mechanism 321 and the second heat medium guiding mechanism 322 have heat medium output ends, and the heat medium output ends are configured to be arranged towards the solid-state electrolyte layer 620 in the composite tape 600, so as to form a heating area for heating the outer surface of the solid-state electrolyte layer 620.

[0044] It can be understood that both the first heat medium guiding mechanism 321 and the second heat medium guiding mechanism 322 are located on the same side of the carrier film tape. Specifically, they are arranged on the side of the carrier film tape with the solid-state electrolyte layer 620. During the process of the composite tape 600 being conveyed to the rolling device 400, the first heat medium guiding mechanism 321 and the second heat medium guiding mechanism 322 can transfer the heat of the heat medium to each solid-state electrolyte layer 620 on the carrier film tape to complete the preheating and temperature raising work of the solid-state electrolyte layer 620 on the carrier film tape. The first heat medium guiding mechanism 321 and the second heat medium guiding mechanism 322 can be supported and fixed by brackets.

[0045] The first heat medium guiding mechanism 321 can heat the surface of the solid electrolyte layer 620 away from the carrier film strip (i.e., the surface of the solid electrolyte layer 620 connected to the electrode strip 500). If the solid electrolyte layer 620 is located on the upper surface of the carrier film strip, the first heat medium guiding mechanism 321 is located above the solid electrolyte layer 620 and heats the upper surface of the solid electrolyte layer 620, making the upper surface of the solid electrolyte layer 620 easier to bond with the lower surface of the electrode strip 500 during the rolling process. If the solid electrolyte layer 620 is located on the lower surface of the carrier film strip, the first heat medium guiding mechanism 321 is located below the solid electrolyte layer 620 and heats the lower surface of the solid electrolyte layer 620, promoting the bonding of the lower surface of the solid electrolyte layer 620 with the upper surface of the electrode strip 500 during the rolling process.

[0046] Of course, the solid electrolyte layer 620 can also be located on the left or right side of the carrier film strip.

[0047] A plurality of groups of second heat medium guiding mechanisms 322 are arranged in a surrounding manner with respect to the first heat medium guiding mechanism 321. When one of the solid electrolyte layers 620 on the carrier film strip moves to the first preheating station, the heat medium output end of the first heat medium guiding mechanism 321 faces the surface of the solid electrolyte layer 620 connected to the electrode strip 500 and can preheat the surface of the solid electrolyte layer 620 connected to the electrode strip 500. The heat medium output end of each second heat medium guiding mechanism 322 faces the side surface of the solid electrolyte layer 620, that is, all the second heat medium guiding mechanisms 322 are distributed around the circumference of the solid electrolyte layer 620, so that all the second heat medium guiding mechanisms 322 can jointly preheat the circumferential side surface of the solid electrolyte layer 620. At this time, the connection effect between the circumferential side of the solid electrolyte layer 620 and the carrier film strip can be weakened, making the solid electrolyte layer 620 easily detached from the carrier film strip during the rolling process and transferred to the electrode strip 500.

[0048] The number of the second heat medium guiding mechanisms 322 can be set according to actual needs and is not specifically limited here. If the solid electrolyte layer 620 is square, four second heat medium guiding mechanisms 322 can be provided and arranged corresponding to the four side surfaces of the solid electrolyte layer 620 respectively. If the solid electrolyte layer 620 is circular, one or more second heat medium guiding mechanisms 322 can be provided and arranged circumferentially around the solid electrolyte layer 620. When multiple groups of second heat medium guiding mechanisms 322 are provided, all the second heat medium guiding mechanisms 322 can be evenly arranged.

[0049] The first heat medium export mechanism 321 and the second heat medium export mechanism 322 can complete the preheating of the solid electrolyte layer 620 by infrared irradiation or hot air heat transfer. The infrared irradiation method is relatively easier to rapidly increase the temperature of the solid electrolyte layer 620 than the hot air heat transfer method.

[0050] In some examples, the first heat medium export mechanism 321 is a first infrared heater, and the irradiation surface of the first infrared heater is arranged facing the surface of the solid electrolyte layer 620 away from the carrier film tape. At this time, the light source of the first infrared heater is the heat medium output end. Moreover, the second heat medium export mechanism 322 is a reflector, and the reflector can reflect the infrared light of the infrared heater and reflect part of the infrared light to the side surface of the solid electrolyte layer 620. At this time, the mirror surface of the reflector is the heat medium output end.

[0051] It can be understood that, as Figure 2 shown, the light source of the first infrared heater emits infrared light and irradiates on the surface of the solid electrolyte layer 620 away from the carrier film tape. At this time, a central irradiation area 323 and an edge irradiation area 324 are formed on this surface. However, the side surface of the solid electrolyte layer 620 is not irradiated by the infrared light. Then, through the light reflection effect of the reflector, part of the infrared light is irradiated on the side surface of the solid electrolyte layer 620. At this time, four reflectors are provided, corresponding to the four side surfaces of the solid electrolyte layer 620 respectively. The reflector can reflect part of the infrared light emitted by the light source on the side surface of the solid electrolyte layer 620, so that the peripheral side surface of the solid electrolyte layer 620 can be heated.

[0052] The outer surface of the solid electrolyte layer 620 before rolling is preheated and dissolved by the solid electrolyte preheating device 300, so that the solid electrolyte layer 620 can be quickly separated from the carrier film tape when entering the rolling device 400 and transferred to the surface of the electrode sheet tape 500. Moreover, a solid electrolyte layer 620 with good uniformity is formed on the surface of the electrode sheet tape 500, effectively avoiding part of the solid electrolyte layer 620 remaining on the surface of the separator film tape 610.

[0053] Of course, the second heat medium export mechanism 322 can also be a first infrared heater, and the irradiation surface of the first infrared heater is arranged facing the side surface of the solid electrolyte layer 620.

[0054] In addition, in some other examples, neither the first heat medium guiding mechanism 321 nor the second heat medium guiding mechanism 322 is excluded from being a PTC (Positive Temperature Coefficient) heater. Specifically, the first heat medium guiding mechanism 321 and the second heat medium guiding mechanism 322 heat up the air and blow the hot air towards the outer surface of the solid electrolyte layer 620, and then complete the preheating work of the outer surface of the solid electrolyte layer 620 through the heat conduction of the air.

[0055] In some embodiments, the solid electrolyte layer 620 is manufactured only on one of the surfaces of the electrode strip 500. Therefore, one first preheating unit 320 is provided, and the first preheating unit 320 directly preheats the solid electrolyte layer 620 on the carrier film strip.

[0056] In some other embodiments, as Figure 1 、 Figure 6 and Figure 7 shown, it is necessary to manufacture the solid electrolyte layer 620 on the opposite two surfaces of the electrode strip 500. At this time, two composite strips 600 are arranged on the opposite sides of the electrode strip 500. The two composite strips 600 and the electrode strip 500 enter the rolling device 400 at the same time. Through the rolling process, the solid electrolyte layers 620 of the two composite strips 600 are transferred onto the electrode strip 500. Therefore, two first preheating units 320 are provided, and the two first preheating units 320 are arranged at intervals to heat the solid electrolyte layers 620 in the two composite strips 600 respectively.

[0057] It can be understood that if it is necessary to form the solid electrolyte layer 620 on the upper surface and the lower surface of the electrode strip 500, one of the first preheating units 320 is located above the electrode strip 500 to preheat the solid electrolyte layer 620 on the lower surface of the carrier film strip, and the other first preheating unit 320 is located below the electrode strip 500 to preheat the solid electrolyte layer 620 on the upper surface of the carrier film strip.

[0058] In some embodiments, as Figure 1As shown, the solid electrolyte preheating device 300 further includes a second preheating unit 310. Among them, the second preheating unit 310 is configured to heat the solid electrolyte forming surface of the electrode strip 500 at the input end of the rolling device 400. It can be understood that before the composite strip 600 and the electrode strip 500 are rolled, the first preheating unit 320 preheats the outer surface of the solid electrolyte layer 620 of the composite strip 600, and at the same time, the second preheating unit 310 preheats the surface of the electrode strip 500, so that the solid electrolyte layer 620 of the composite strip 600 can be easily laminated with the preheated surface (i.e., the solid electrolyte forming surface) of the electrode strip 500. At the same time, during the rolling process, the solid electrolyte layer 620 can be easily detached from the separator strip 610 and adhered to the solid electrolyte forming surface of the electrode strip 500.

[0059] In some examples, the second preheating unit 310 includes a second infrared heater, and the irradiation direction of the second infrared heater is configured to be perpendicular to the solid electrolyte forming surface of the electrode strip 500. The second preheating unit 310 has a second preheating station. When the electrode strip 500 moves to the second preheating station, the second infrared heater irradiates the solid electrolyte forming surface of the electrode strip 500, so that the electrode strip 500 can be heated up to complete the preheating work. The second preheating unit 310 can be supported and fixed by a bracket.

[0060] Of course, it is not excluded that the second preheating unit 310 can include a PTC heater, and the second preheating unit 310 preheats the electrode strip 500 by means of hot air.

[0061] In some embodiments, as Figure 1 、 Figure 6 and Figure 7 shown, when it is necessary to form solid electrolyte layers 620 on the opposite two surfaces of the electrode strip 500, there are two first preheating units 320, and the two first preheating units 320 are arranged at intervals to respectively heat the solid electrolyte layers 620 in the two composite strips 600. Moreover, there are two second preheating units 310, and the two second preheating units 310 are arranged oppositely to form a preheating channel for the electrode strip 500 to pass through. The two second preheating units 310 can be located between the two first preheating units 320. One of the first preheating units 320 is located on one side of the two second preheating units 310, and the other first preheating unit 320 is located on the opposite side of the two second preheating units 310. It can be understood that in combination with Figure 7 , in this embodiment, one first preheating unit 320 can be understood as the first heat medium export mechanism 321, and the other first preheating unit 320 can be understood as the second heat medium export mechanism 322.

[0062] It can be understood that after the electrode strip 500 passes through the preheating channel, both opposite surfaces of the electrode strip 500 can be preheated to facilitate lamination with the solid electrolyte layer 620 of the composite strip 600. Moreover, during the rolling process, solid electrolyte layers 620 can be formed on both opposite surfaces of the electrode strip 500.

[0063] In some other embodiments, when it is only necessary to fabricate the solid electrolyte layer 620 on one of the surfaces of the electrode strip 500, one first preheating unit 320 and one second preheating unit 310 are both provided.

[0064] In the solid electrolyte preheating device 300 provided in the first aspect embodiment of the present invention, since the solid electrolyte preheating device 300 is disposed on the front side of the input end of the rolling device 400, before the rolling process, the first preheating unit 320 preheats the solid electrolyte layer 620 in the composite strip 600. During the preheating process, the first heat medium guiding mechanism 321 of the first preheating unit 320 can heat up the surface of the solid electrolyte layer 620 connected to the electrode strip 500. Meanwhile, several groups of second heat medium guiding mechanisms 322 arranged in a surrounding manner of the first preheating unit 320 can heat up the side surface of the solid electrolyte layer 620, so that the solid electrolyte layer 620 can easily separate from the separator strip 610 during the rolling process and quickly transfer onto the surface of the electrode strip 500.

[0065] Moreover, the second preheating unit 310 can also be used to preheat the electrode strip 500 before rolling, making it easier for the electrode strip 500 and the solid electrolyte layer 620 to be laminated.

[0066] By such a design, the forming speed and forming effect of the solid electrolyte layer 620 on the electrode strip 500 can be improved, preventing the solid electrolyte layer 620 from remaining on the separator strip 610 and affecting the uniformity of the solid electrolyte layer 620 on the electrode strip 500, thereby enhancing the quality of the solid-state battery. Meanwhile, the problem that the solid electrolyte layer 620 cannot be rolled in the form of a strip due to poor supportability of the solid electrolyte layer 620, as well as the problems of low forming efficiency and poor uniformity of the solid electrolyte layer 620 caused by the method of spraying electrolyte powder, are solved.

[0067] As Figures 1 to 6 shown, the rolling and transfer printing equipment according to the second aspect embodiment of the present invention can fabricate the solid electrolyte layer 620 on the surface of the electrode strip 500 through a rolling and transfer printing method.

[0068] The structure of the rolling and transfer printing equipment includes a rolling device 400 and the solid electrolyte preheating device 300 of the first aspect embodiment.

[0069] The rolling device 400 has a rolling channel configured to roll the electrode strip 500 and the composite strip 600 so that the solid electrolyte layer 620 in the composite strip 600 is transferred onto the electrode strip 500. The opposite ends of the rolling channel are an input end and an output end respectively. The electrode strip 500 and the composite strip 600 can enter from the input end of the rolling channel. Inside the rolling channel, the electrode strip 500 and the composite strip 600 are stacked. After the rolling process is completed, the separator strip 610 and the composite electrode strip come out from the output end of the rolling channel.

[0070] It can be understood that the composite strip 600 and the electrode strip 500 can be conveyed to the rolling channel by means of unwinding or from an upstream processing operation such as a manufacturing operation. The separator strip 610 can be recovered from the output end of the rolling channel by means of winding. The composite electrode strip can be recovered by means of winding or conveyed to a downstream processing operation such as a cutting operation.

[0071] As Figure 3 and Figure 4 As shown, the rolling device 400 includes a mounting base 420 and two rolling assemblies 410. The two rolling assemblies 410 are arranged on the mounting base 420, are arranged oppositely, and jointly define the rolling channel. Further, the rolling device 400 further includes a position adjusting mechanism 430 for adjusting the distance between the two rolling assemblies 410, thereby adjusting the size of the rolling channel to perform a rolling process on the electrode strip 500 and the composite strip 600 in the rolling channel. The position adjusting mechanism 430 can be but is not limited to a linear module or a hand-cranked lead screw slide.

[0072] Each rolling assembly 410 includes a pressure roller 411, a mounting plate 413, and a driving motor 412. The driving motor 412 is fixedly connected to one end of the pressure roller 411 through a transmission structure such as a coupling. The opposite ends of the pressure roller 411 are arranged on the mounting plate 413 through bearings, and the mounting plate 413 is connected to the mounting base 420. When the driving motor 412 operates, the pressure roller 411 can rotate around its central axis.

[0073] In some examples, the rolling device 400 adopts a horizontal design. As Figure 3 shown, the rolling channel runs through up and down, and the electrode strip 500 and the composite strip 600 can enter the rolling channel from top to bottom. In other examples, the rolling device 400 adopts a vertical design. As Figure 4 shown, the rolling channel runs through front and back, and the electrode strip 500 and the composite strip 600 can enter the rolling channel from front to back.

[0074] The solid-state electrolyte preheating device 300 is arranged near the input end of the rolling device 400, and can preheat the solid-state electrolyte layer 620 of the composite tape 600 to be fed into the rolling channel. Moreover, it can also preheat the electrode strip 500 to be fed into the rolling channel.

[0075] It can be understood that in some examples, the rolling device 400 can be used to roll a composite tape 600 and an electrode strip 500, so that a layer of solid-state electrolyte layer 620 is formed on the surface of the electrode strip 500. At this time, the number of the first preheating units 320 is one, and the number of the second preheating units 310 is also one. In other examples, the rolling device 400 can be used to roll two composite tapes 600 and an electrode strip 500, so that a layer of solid-state electrolyte layer 620 is formed on both opposite surfaces of the electrode strip 500. At this time, two first preheating units 320 and two second preheating units 310 are provided.

[0076] In some embodiments, as Figure 1 shown, the structure of the rolling and transfer printing equipment further includes a first unwinding device 110, a second unwinding device 210, a first winding device 120, and a second winding device 220.

[0077] The first unwinding device 110 is configured to unwind the electrode strip 500 to the input end of the rolling device 400.

[0078] The second unwinding device 210 is configured to unwind the composite tape 600 to the input end of the rolling device 400. Among them, the composite tape 600 includes a separator tape 610 and a solid-state electrolyte layer 620. There are multiple solid-state electrolyte layers 620, which are arranged at intervals along the extending direction of the separator tape 610, and the solid-state electrolyte layer 620 is fixed to the surface of the separator tape 610.

[0079] The first winding device 120 is configured to wind the composite electrode strip output from the output end of the rolling device 400. Among them, the composite electrode strip includes an electrode strip 500 and a solid-state electrolyte layer 620. There are multiple solid-state electrolyte layers 620, which are arranged at intervals along the extending direction of the electrode strip 500, and the solid-state electrolyte layer 620 is fixed to the surface of the electrode strip 500.

[0080] The second winding device 220 is configured to wind the separator tape 610 output from the output end of the rolling device 400.

[0081] It can be understood that the first unwinding device 110 and the second unwinding device 210 are both existing unwinding machines, and the first winding device 120 and the second winding device 220 are both existing winding machines. In this embodiment, the first unwinding device 110, the second preheating unit 310, the rolling device 400, and the first winding device 120 are arranged in sequence along the conveying path of the electrode strip 500, and the second unwinding device 210, the first preheating unit 320, the rolling device 400, and the second winding device 220 are arranged in sequence along the conveying path of the composite strip 600.

[0082] When the first unwinding device 110 and the second unwinding device 210 are working, the released electrode strip 500 and composite strip 600, after being preheated, enter the rolling channel of the rolling device 400 together; then, in the rolling channel, the electrode strip 500 and the solid electrolyte layer 620 are subjected to a rolling and laminating process, making the solid electrolyte layer 620 easy to detach from the separator strip 610 and quickly adhere to the surface of the electrode strip 500; finally, the first winding device 120 winds up the rolled composite electrode strip (i.e., the electrode strip 500 with the solid electrolyte layer 620), and at the same time, the second winding device 220 winds up the separator strip 610 after the solid electrolyte layer 620 is transferred.

[0083] In some embodiments, as Figure 1 and Figure 6 shown, there are two second unwinding devices 210 to unwind the composite strip 600 on the opposite sides of the electrode strip 500, so that one electrode strip 500 can be rolled with two composite strips 600, thereby manufacturing the solid electrolyte layer 620 on the opposite two surfaces of the electrode strip 500. Moreover, there are two second winding devices 220 to wind up the separator strips 610 located on the opposite sides of the composite electrode strip.

[0084] In other embodiments, one second unwinding device 210 and one second winding device 220 are respectively provided to perform a rolling process on one electrode strip 500 and one composite strip 600, and then form the solid electrolyte layer 620 on one surface of the electrode strip 500.

[0085] In addition, as Figure 1 shown, a defect detection device 700 and a marking device are provided between the rolling device 400 and the first winding device 120.

[0086] The defect detection device 700 is used to detect whether there are defects in individual electrodes on the composite electrode strip, such as the formation effect of the solid electrolyte layer 620. It can be understood that the defect detection device 700 can be a CCD (charge coupled device) camera, which can take pictures of the surface of the composite electrode strip with the solid electrolyte layer 620, and judge whether there are defects on the surface of the individual electrodes of the composite electrode strip through existing image recognition and processing technologies. If there are defects in the detected electrode, the electrode is determined as an NG electrode. Then, a marking device is used to mark the surface of the NG electrode by laser marking, so as to identify and remove it after being cut into pieces in the subsequent process.

[0087] If one surface of the composite electrode strip has a solid electrolyte layer 620, only one defect detection device 700 needs to be set. If both opposite surfaces of the composite electrode strip have solid electrolyte layers 620, two defect detection devices 700 need to be set to detect defects on the two opposite surfaces of the composite electrode strip respectively.

[0088] Of course, a tension adjustment mechanism, a deviation rectification mechanism, etc. can also be set on the conveying paths of the electrode strip 500 and the composite strip 600.

[0089] In a preferred embodiment, as Figures 3 to 5 shown, the rolling device 400 includes two pressing rollers 411, the two pressing rollers 411 are arranged oppositely and form a rolling channel. Moreover, at least one pressing roller 411 is provided with a peripheral flow channel 418, a heat flow input channel 416 and a heat flow output channel 417. There are a plurality of peripheral flow channels 418, and the plurality of peripheral flow channels 418 are distributed circumferentially around the pressing roller 411. One end of the peripheral flow channel 418 is communicated with the heat flow input channel 416, and the other end of the peripheral flow channel 418 is communicated with the heat flow output channel 417.

[0090] It can be understood that the peripheral flow channel 418 is arranged close to the outer peripheral surface of the pressing roller 411, and a heat fluid flows in the peripheral flow channel 418. The heat fluid can be a heat medium such as hot oil or hot water, so that the temperature of the outer peripheral surface of the pressing roller 411 rises, so as to perform hot rolling treatment on the electrode strip 500 and the composite strip 600, which helps to quickly transfer the solid electrolyte layer 620 from the separator strip 610 to the surface of the electrode strip 500.

[0091] If the axis of the pressing roller 411 extends in the left-right direction, the peripheral flow channel 418 extends in the left-right direction, and the cross-sectional shape of the peripheral flow channel 418 can be circular. The plurality of peripheral flow channels 418 are evenly arranged around the central axis of the pressing roller 411. It can be understood that the number of the peripheral flow channels 418 can be set according to the actual situation and will not be specifically limited here.

[0092] A heat flow input channel 416 and a heat flow output channel 417 are provided at the central axis position of the pressure roller 411. The heat flow input channel 416 and the heat flow output channel 417 are coaxially arranged and extend in the left - right direction. In this embodiment, the heat flow output channel 417 is located inside the heat flow input channel 416. Therefore, the outer peripheral surface of the heat flow output channel 417 and the inner peripheral surface of the heat flow input channel 416 form a heat fluid circulation area. One end of the heat flow input channel 416 is provided with a first interface 414. A branch channel 419 is provided between the other end of the heat flow input channel 416 and one end of each peripheral channel 418. One end of the heat flow output channel 417 is provided with a second interface 415. A branch channel 419 is also provided between the other end of the heat flow output channel 417 and the other end of each peripheral channel 418. For easy manufacturing, the branch channel 419 can be a slanted, long - straight channel structure.

[0093] Moreover, a heat flow pipe is connected to each of the first interface 414 and the second interface 415. One of the heat flow pipes is provided with a pump body. Under the pumping action, the heat fluid flows through the heat flow input channel 416 to the peripheral channel 418, so that the outer peripheral surface of the pressure roller 411 is heated and raised in temperature. Then, the heat - exchanged heat fluid flows from the peripheral channel 418 to the heat flow output channel 417.

[0094] Of course, other heating methods such as infrared irradiation are not excluded for heating the outer peripheral surface of the pressure roller 411.

[0095] When the pressure roller 411 has a hot roll - pressing function, a roller shaft can be arranged near the pressure roller 411. The composite material tape 600 is wound around the roller shaft and passes through the roll - pressing channel. At the same time, the contact area between the composite material tape 600 and the pressure roller 411 is increased, so that the composite material tape 600 absorbs more heat from the pressure roller 411, the temperature of the composite material tape 600 is increased, and thus the effect of hot roll - pressing is improved.

[0096] In the roll - pressing and transfer printing device provided in the second - aspect embodiment of the present utility model, since the solid - state electrolyte pre - heating device 300 can pre - heat the solid - state electrolyte layer 620 of the composite material tape 600 before the composite material tape 600 follows the pole - piece tape 500 into the roll - pressing channel of the roll - pressing device 400, the solid - state electrolyte layer 620 can be easily detached and quickly adhered to the surface of the pole - piece tape 500 during roll - pressing. Thus, the formation speed and uniformity of the solid - state electrolyte layer 620 on the pole - piece tape 500 can be improved, which is beneficial to improving the manufacturing quality of solid - state batteries.

[0097] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0098] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A solid electrolyte preheating device, characterized in that: The invention comprises a first preheating unit (320), wherein the first preheating unit (320) is configured to heat a composite material strip (600) located at an input end of a rolling device (400), wherein the first preheating unit (320) comprises a first heat medium export mechanism (321) and a second heat medium export mechanism (322), wherein the second heat medium export mechanism (322) is provided with a plurality of groups, wherein the first heat medium export mechanism (321) and the second heat medium export mechanism (322) both have a heat medium output end, wherein the heat medium output end is configured to be arranged toward a solid electrolyte layer (620) in the composite material strip (600) so as to form a heating zone for heating the outer surface of the solid electrolyte layer (620).

2. The solid electrolyte preheating device according to claim 1, characterized in that: Two of the first preheating units (320) are provided and arranged at intervals to heat the solid electrolyte layers (620) in the two composite material strips (600) respectively.

3. The solid electrolyte preheating device according to claim 1 or 2, characterized in that: The first heat medium export mechanism (321) is a first infrared heater, the second heat medium export mechanism (322) is distributed around the first heat medium export mechanism (321), and the second heat medium export mechanism (322) is a reflector or a first infrared heater.

4. The solid electrolyte preheating device according to claim 1, characterized in that: It also includes a second preheating unit (310), which is configured to heat the solid electrolyte molding surface of the pole piece strip (500) located at the input end of the rolling device (400).

5. The solid electrolyte preheating device according to claim 4, characterized in that: The second preheating unit (310) comprises a second infrared heater, and the irradiation direction of the second infrared heater is configured to be arranged perpendicular to the solid electrolyte forming surface of the pole piece strip (500).

6. The solid electrolyte preheating device according to claim 4 or 5, characterized in that: Two of the first preheating units (320) are provided and arranged at intervals to heat the solid electrolyte layers (620) in the two composite material strips (600) respectively, and two of the second preheating units (310) are provided and arranged opposite to each other to form a preheating channel for the pole piece material strip (500) to pass through.

7. Roller transfer equipment, characterized in that: include: A rolling device (400) having a rolling channel, wherein the rolling channel is configured to roll the pole piece strip (500) and the composite strip (600) so that the solid electrolyte layer (620) in the composite strip (600) is transferred to the pole piece strip (500), and opposite ends of the rolling channel are an input end and an output end, respectively; The solid electrolyte preheating device (300) according to any one of claims 1 to 6, which is arranged close to the input end of the rolling device (400).

8. The roller transfer device according to claim 7, characterized in that: Also includes: A first unwinding device (110) configured to unwind a pole piece strip (500) toward an input end of the rolling device (400); A second unwinding device (210) is configured to unwind a composite material strip (600) toward an input end of the rolling device (400), wherein the composite material strip (600) comprises an isolation film material strip (610) and a solid electrolyte layer (620); A first winding device (120) is configured to be able to wind up the composite pole piece strip (500) output from the output end of the rolling device (400), wherein the composite pole piece strip (500) comprises a pole piece strip (500) and a solid electrolyte layer (620); The second winding device (220) is configured to be able to wind up the isolation film material strip (610) output from the output end of the rolling device (400).

9. The roller transfer device according to claim 8, characterized in that: Two second unwinding devices (210) are provided to unwind the composite material strip (600) on opposite sides of the pole piece material strip (500); and two second winding devices (220) are provided to wind up the isolation film material strip (610) located on opposite sides of the composite pole piece material strip (500).

10. The roller transfer device according to any one of claims 7 to 9, characterized in that: The rolling device (400) comprises two pressing rollers (411), the two pressing rollers (411) are arranged opposite to each other and form the rolling channel, at least one of the pressing rollers (411) is provided with a peripheral flow channel (418), a heat flow input flow channel (416) and a heat flow output flow channel (417), the peripheral flow channel (418) is provided with a plurality of peripheral flow channels (418) and is distributed circumferentially around the pressing roller (411), one end of the peripheral flow channel (418) is connected to the heat flow input flow channel (416), and the other end is connected to the heat flow output flow channel (417).

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