Core manufacturing method and device based on rubber frame covering and solid-state battery production line

Abstract

The invention discloses a core manufacturing method and equipment based on rubber frame covering and a solid-state battery production line, and relates to the technical field of solid-state battery manufacturing. Covering the first pole piece or the second pole piece with an annular electric insulation film; a rubber frame is formed on the first pole piece or the first pole piece with the insulating film, so that the peripheral edge of the rubber frame is located on the inner side of the peripheral edge of the first pole piece or flush with the peripheral edge of the first pole piece; overlapping the first pole piece with the electrified insulating film and the rubber frame with the second pole piece, or overlapping the first pole piece with the rubber frame with the second pole piece with the electrified insulating film to obtain a battery cell structure; a solid electrolyte membrane is arranged between a first pole piece and a second pole piece of the cell structure, a rubber frame surrounds the periphery of the solid electrolyte membrane and surrounds the periphery of the second pole piece, and the two ends of an electric insulation membrane extend to the inner side and the outer side of the periphery of the second pole piece and make contact with the rubber frame. The battery cell structure prepared by the invention is good in safety, and short circuit between the pole pieces caused by collapse of gaps between the rubber frame and the adjacent pole pieces during isostatic pressing can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of solid-state battery manufacturing, and particularly to a core manufacturing method, equipment, and solid-state battery production line based on glue frame lamination. Background Art

[0002] Compared with traditional lithium-ion batteries, solid-state lithium metal batteries have a high energy density, can store more energy, and can improve the endurance. Therefore, solid-state lithium metal batteries can replace traditional lithium-ion batteries and be widely used. In the existing solid-state battery production process, in order to ensure close bonding between the solid electrolyte membrane and the electrode membrane, an isostatic pressing process is used to complete the pressing treatment between the solid electrolyte membrane and the electrode membrane.

[0003] However, in the isostatic pressing process, due to the influence of lateral forces, it is easy for the solid electrolyte membrane and the electrode membrane to shift, and further, it is easy to cause the edges of the anode membrane and the cathode membrane to bend and contact due to the pressing action during the isostatic pressing process or the lamination process, resulting in a short-circuit problem. Based on this situation, a glue frame can be added at the edge of the anode membrane or the cathode membrane to enhance the lamination and insulation effect between adjacent two electrode plates. However, a gap will be formed between the edge of the glue frame and the adjacent electrode plate, and the glue frame may collapse during the isostatic pressing treatment, resulting in a short-circuit problem between the positive and negative electrodes. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. For this purpose, the present invention provides a core manufacturing method, equipment, and solid-state battery production line based on glue frame lamination, which can manufacture a core structure with high safety performance, effectively avoid the collapse of the gap between the glue frame and the adjacent electrode plate during the isostatic pressing process, resulting in a short-circuit between the electrode plates, and promote the improvement of the manufacturing quality of solid-state batteries.

[0005] The first aspect embodiment of the present invention provides a core manufacturing method based on glue frame lamination, which includes the following steps: Laminating an annular electrical insulating film on the first electrode plate or the second electrode plate; Forming a glue frame on the first electrode plate or the first electrode plate containing the electrical insulating film, so that the outer periphery of the glue frame is located inside the periphery of the first electrode plate or flush with the periphery of the first electrode plate; Stack the first electrode sheet containing the electrical insulation film and the glue frame with the second electrode sheet, or stack the first electrode sheet containing the glue frame with the second electrode sheet containing the electrical insulation film to obtain a battery cell structure; in the battery cell structure, a solid electrolyte film is attached between the first electrode sheet and the second electrode sheet, the glue frame is arranged around the periphery of the solid electrolyte film, and encloses the outer periphery of the second electrode sheet, and one end of the electrical insulation film extends to the inner side of the periphery of the second electrode sheet, and the other end extends to the outer side of the periphery of the second electrode sheet and contacts the glue frame.

[0006] The core manufacturing method based on glue frame lamination according to the first aspect embodiment of the present invention has at least the following beneficial effects: by manufacturing an annular glue frame on the first electrode sheet, laminating and forming an annular electrical insulation film on the second electrode sheet, and then performing an up and down stacking process on the first electrode sheet with the glue frame and the second electrode sheet with the electrical insulation film, a battery cell structure containing both a glue frame and an electrical insulation film is manufactured; or by sequentially forming an annular electrical insulation film and an annular glue frame on the first electrode sheet, and then stacking the first electrode sheet with both the electrical insulation film and the glue frame with the second electrode sheet to obtain a battery cell structure with both a glue frame and an electrical insulation film.

[0007] Through the stacking and lamination process, the glue frame on the first electrode sheet is arranged around the periphery of the solid electrolyte film between the first electrode sheet and the second electrode sheet and encloses the outer periphery of the second electrode sheet, which is beneficial to ensuring good lamination effect between the electrode sheets and obtaining a certain electrical insulation effect; at the same time, it can also make one end of the electrical insulation film located between the first electrode sheet and the second electrode sheet, the other end of the electrical insulation film extends to the outer side of the periphery of the second electrode sheet and contacts the glue frame, so that the electrical insulation film can play a role in separating the first electrode sheet and the second electrode sheet at the gap between the glue frame and the second electrode sheet to strengthen the electrical insulation effect, effectively avoiding the problem of short circuit between the first electrode sheet and the second electrode sheet caused by the collapse of the gap between the glue frame and the adjacent second electrode sheet under isostatic pressing.

[0008] In some embodiments of the present invention, the laminating the annular electrical insulation film on the first electrode sheet or the second electrode sheet includes the following steps: Cut the strip of the electrical insulation film to obtain an annular electrical insulation film; Laminating the electrical insulation film on the first electrode sheet or the second electrode sheet; Turn over the first electrode sheet with the electrical insulation film on one side or the second electrode sheet with the electrical insulation film on one side; Laminating the electrical insulation film on the turned-over first electrode sheet or the turned-over second electrode sheet so that both sides of the first electrode sheet or both sides of the second electrode sheet contain the electrical insulation film.

[0009] In some embodiments of the present invention, laminating an annular electrical insulating film on the first electrode tab or the second electrode tab includes the following steps: Cut the strip of the electrical insulating film to obtain a strip-shaped electrical insulating film; Arrange and laminate the electrical insulating film along the circumference of the first electrode tab or the second electrode tab; Turn over the first electrode tab with the electrical insulating film on one side or the second electrode tab with the electrical insulating film on one side; Arrange and laminate the electrical insulating film along the circumference of the turned-over first electrode tab or the turned-over second electrode tab, so that both sides of the first electrode tab or both sides of the second electrode tab contain the electrical insulating film.

[0010] In some embodiments of the present invention, cutting the strip of the electrical insulating film includes the following steps: Continuously convey the strip of the electrical insulating film; Cut the strip by laser die-cutting to obtain the electrical insulating film.

[0011] In some embodiments of the present invention, continuously conveying the strip of the electrical insulating film includes the following steps: Unwind the strip of the electrical insulating film; Peel and wind up the release film on the strip; wherein, an adhesive layer is provided on the surface of the strip facing the release film; Wind up the waste strip after cutting.

[0012] In some embodiments of the present invention, after cutting the strip of the electrical insulating film, the following steps are further included: Vacuum adsorb the cut electrical insulating film; Vacuum adsorb the first electrode tab or the second electrode tab; Turn the vacuum-adsorbed electrical insulating film downward and move it downward relative to the first electrode tab or the second electrode tab to paste the electrical insulating film on the first electrode tab or the second electrode tab.

[0013] In some embodiments of the present invention, forming a glue frame on the first electrode tab or the first electrode tab containing the electrical insulating film includes the following steps: Manufacture a glue frame on the first electrode tab or the first electrode tab containing the electrical insulating film by screen printing or transfer printing; Turn over the first electrode tab with the glue frame on one side; Form a glue frame on the turned-over first electrode tab by screen printing or transfer printing, so that both sides of the first electrode tab contain the glue frame.

[0014] In a second aspect embodiment of the present invention, a core manufacturing device based on glue frame lamination is provided, which is used to implement the core manufacturing method based on glue frame lamination as described in the first aspect embodiment, and includes: A first forming unit for laminating an annular electrical insulating film on the first pole piece or the second pole piece; A second forming unit for forming a glue frame on the first pole piece or the first pole piece containing the electrical insulating film, so that the outer periphery of the glue frame is located inside the periphery of the first pole piece or flush with the periphery of the first pole piece; A lamination unit for stacking the first pole piece containing the electrical insulating film and the glue frame with the second pole piece, or stacking the first pole piece containing the glue frame with the second pole piece containing the electrical insulating film to obtain a battery cell structure; wherein, a solid electrolyte film is attached between the first pole piece and the second pole piece in the battery cell structure, the glue frame is arranged around the periphery of the solid electrolyte film, and is enclosed outside the periphery of the second pole piece, and one end of the electrical insulating film extends to the inside of the periphery of the second pole piece, and the other end extends to the outside of the periphery of the second pole piece and contacts the glue frame.

[0015] The core manufacturing device based on glue frame lamination according to the second aspect embodiment of the present invention has at least the following beneficial effects: An annular electrical insulating film is formed on the first pole piece or the second pole piece by the first forming unit, and an annular glue frame is formed on the first pole piece or the first pole piece with an electrical insulating film by the second forming unit, and then the lamination unit is used to stack the first pole piece containing both the glue frame and the electrical insulating film with the second pole piece, or stack the first pole piece containing the glue frame with the second pole piece containing the electrical insulating film, so as to form a battery cell structure. At this time, there are a solid electrolyte film and an electrical insulating film between the first pole piece and the second pole piece in the battery cell structure. At the same time, the glue frame is arranged around the periphery of the solid electrolyte film and is enclosed outside the periphery of the second pole piece, and the electrical insulating film can separate the first pole piece and the second pole piece at the gap between the inner periphery of the glue frame and the outer wall of the second pole piece, thereby preventing the risk of collapse at the gap between the glue frame and the adjacent second pole piece under isostatic pressing treatment, resulting in a short circuit between the first pole piece and the second pole piece, and improving the safety of the battery cell structure.

[0016] In some embodiments of the present invention, the first forming unit includes: A first conveying device for transferring the first pole piece or the second pole piece; A film forming device for cutting out a frame-shaped or strip-shaped electrical insulating film; A film lamination device for laminating the electrical insulating film on the first pole piece or the second pole piece.

[0017] In some embodiments of the present invention, the film forming device includes: An unwinding mechanism for unwinding the strip of the electrical insulating film; A cutting mechanism for cutting the unwound strip to obtain the electrical insulating film in a frame shape or a strip shape; A first winding mechanism for winding the waste strip after cutting; A second winding mechanism for peeling and winding the release film on the strip, wherein an adhesive layer is provided on the surface of the strip facing the release film; and / or, The film laminating device includes: An adsorption mechanism for vacuum-adsorbing the cut electrical insulating film; A lamination platform for vacuum-adsorbing the first electrode sheet or the second electrode sheet; A driving mechanism for driving the adsorption mechanism to turn over and move up and down, so that the electrical insulating film is laminated with the first electrode sheet or the second electrode sheet on the lamination platform; A turning-over mechanism for turning over the first electrode sheet or the second electrode sheet on the lamination platform to switch the surface of the first electrode sheet laminated with the electrical insulating film, or to switch the surface of the second electrode sheet laminated with the electrical insulating film.

[0018] The third aspect embodiment of the present invention provides a solid-state battery production line, which includes the core-making equipment based on glue frame lamination according to any one of the second aspect embodiments.

[0019] The solid-state battery production line according to the third aspect embodiment of the present invention has at least the following beneficial effects: By adopting the core-making equipment based on glue frame lamination with the above structure to manufacture a core structure with both a glue frame and an electrical insulating film, it is possible to avoid the collapse of the gap position between the glue frame and the second electrode sheet, which may cause a short circuit, thereby improving the manufacturing quality of the solid-state battery.

[0020] Other features and advantages of the present invention will be described in the subsequent specification, and, in part, will be obvious from the specification, 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 specification, the claims, and the drawings. Description of the Drawings

[0021] Figure 1 is a cross-sectional schematic view of a core structure in the prior art; Figure 2 is a flow schematic diagram of a core-making method based on glue frame lamination according to an embodiment of the present invention; Figure 3It is a schematic flow chart of step S1 in the core making method based on glue frame lamination according to Embodiment 1 of the present invention; Figure 4 It is a schematic flow chart of step S1 in the core making method based on glue frame lamination according to Embodiment 2 of the present invention; Figure 5 It is a schematic flow chart of step S11 in the core making method based on glue frame lamination according to the embodiment of the present invention; Figure 6 It is a schematic flow chart of step S111 in the core making method based on glue frame lamination according to the embodiment of the present invention; Figure 7 It is a schematic flow chart of the subsequent process after step S11 in the core making method based on glue frame lamination according to the embodiment of the present invention; Figure 8 It is a schematic flow chart of step S2 in the core making method based on glue frame lamination according to the embodiment of the present invention; Figure 9 It is a schematic cross-sectional view of the battery cell structure according to Embodiment 1 of the present invention; Figure 10 It is a schematic cross-sectional view of the battery cell structure according to Embodiment 2 of the present invention; Figure 11 It is a schematic cross-sectional view of the battery cell structure according to Embodiment 3 of the present invention; Figure 12 It is a schematic cross-sectional view of the battery cell structure according to Embodiment 4 of the present invention; Figure 13 It is a schematic cross-sectional view of the battery cell structure according to Embodiment 5 of the present invention; Figure 14 It is a schematic cross-sectional view of the battery cell structure according to Embodiment 6 of the present invention; Figure 15 It is a schematic cross-sectional view of the battery cell structure according to Embodiment 7 of the present invention; Figure 16 It is a schematic cross-sectional view of the battery cell structure according to Embodiment 8 of the present invention; Figure 17 It is a schematic diagram of the structure of the core making equipment based on glue frame lamination according to the embodiment of the present invention; Figure 18 It is a schematic diagram of the structure of the film forming device and the film laminating device in the core making equipment based on glue frame lamination according to the embodiment of the present invention.

[0022] Reference numerals: 110, first pole piece; 120, second pole piece; 130, solid electrolyte film; 140, glue frame; 150, gap; 160, electrical insulation film; 310. Film forming device; 311. Cutting mechanism; 312. Unwinding mechanism; 313. First winding mechanism; 314. Second winding mechanism; 320. Film laminating device; 321. First film sticking station; 322. Second film sticking station; 323. Adsorption mechanism; 324. Laminating platform; 330. Second forming unit; 331. Printing loading station; 332. Printing station; 333. Printing unloading station; 334. Curing station; 340. Laminating unit; 341. Stacking station. Detailed implementation manners

[0023] The embodiments of the present invention 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 only for explaining the present invention and should not be construed as a limitation of the present invention.

[0024] In the description of the present invention, it should be understood that the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "connected" and "coupled" 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 invention can be understood according to specific situations.

[0026] A solid-state lithium metal battery is a new type of battery that uses a solid electrolyte to replace the separator and liquid electrolyte used in traditional lithium-ion batteries, enabling the graphite anode or silicon anode in traditional lithium-ion batteries to be replaced by a lithium metal anode. The lithium metal anode has a higher energy density than traditional anodes, allowing the battery to store more energy in the same volume, which is beneficial to enhancing its endurance.

[0027] At present, the production process of existing solid-state batteries is still not very mature. Compared with the liquid electrolyte that can be in full contact with the electrode film, it is difficult to closely fit the solid electrolyte film and the electrode film. Therefore, an isostatic pressing device can be added at the back end of the solid-state battery production line to press the solid electrolyte film and the electrode film by isostatic pressing. However, during the isostatic pressing process, the solid electrolyte film and the electrode film are prone to shift due to the influence of the lateral force existing in the isostatic pressing container. In addition, during the isostatic pressing or lamination process, the edges of the anode film and the cathode film are prone to bend and contact due to the pressing effect, which may lead to a short-circuit problem.

[0028] Based on the above situation, as Figure 1 shown, a rubber frame 140 can be added at the edge of the anode film or the cathode film to enhance the lamination effect and insulation between adjacent pole pieces. However, a certain gap 150 is usually formed between the inner side of the rubber frame 140 and the edge of the adjacent pole piece. When the isostatic pressing process is carried out, there is an inevitable risk of collapse at this gap 150. After the collapse occurs, a short circuit will occur between the positive and negative pole pieces, resulting in a decline in the safety performance of the battery.

[0029] In order to solve the above problems, the present invention provides a core-making method, equipment and solid-state battery production line based on rubber frame lamination, which can manufacture a core structure with high safety performance, effectively prevent the gap between the rubber frame and the adjacent pole pieces from collapsing during the isostatic pressing process, resulting in a short circuit between the pole pieces, promote the improvement of the manufacturing quality of the solid-state battery, reduce the defective rate of the solid-state battery, and reduce the production cost.

[0030] Next, refer to Figures 1 to 18 to describe the core-making method, equipment and solid-state battery production line based on rubber frame lamination provided by the embodiments of the present invention.

[0031] As Figures 2 to 16 shown, the core-making method based on rubber frame lamination according to the first aspect embodiment of the present invention can manufacture the core structure of the solid-state battery, and moreover, the core structure has high use safety and good quality.

[0032] As Figure 2 shown, the core-making method based on rubber frame lamination includes the following steps: Step S1: Laminate an annular electrical insulation film 160 on the first pole piece 110 or the second pole piece 120.

[0033] Step S2: Form a rubber frame 140 on the first pole piece 110 or the first pole piece 110 with the electrical insulation film 160, so that the outer periphery of the rubber frame 140 is located inside the peripheral edge of the first pole piece 110 or flush with the peripheral edge of the first pole piece 110.

[0034] Step S3: Stack the first pole piece 110 containing the electrical insulation film 160 and the glue frame 140 with the second pole piece 120, or stack the first pole piece 110 containing the glue frame 140 with the second pole piece 120 containing the electrical insulation film 160 to obtain a battery cell structure; in the battery cell structure, a solid electrolyte film 130 is attached between the first pole piece 110 and the second pole piece 120, the glue frame 140 is arranged around the perimeter of the solid electrolyte film 130 and encloses the outer perimeter of the second pole piece 120, and one end of the electrical insulation film 160 extends to the inner side of the perimeter of the second pole piece 120, and the other end extends to the outer side of the perimeter of the second pole piece 120 and contacts the glue frame 140.

[0035] It can be understood that the glue frame 140 can be in a square shape, the inner perimeter of the glue frame 140 is located on the surface of the first pole piece 110, and the outer perimeter of the glue frame 140 does not exceed the edge of the first pole piece 110. The glue frame 140 can be formed on the first pole piece 110 by screen printing process, or transferred to the first pole piece 110 by transfer process. In addition, the glue frame 140 can also be formed on the first pole piece 110 by glue coating method. The glue frame 140 uses UV glue (also known as shadowless glue, photosensitive glue). In addition, the glue frame 140 can be replaced with silicone or PI (i.e., Polyimide) film.

[0036] In the first embodiment, by performing step S1, an annular electrical insulation film 160 is laminated on the first pole piece 110 so that both ends of the electrical insulation film 160 can be located on the inner and outer sides of the perimeter of the second pole piece 120 respectively after the lamination process. The electrical insulation film 160 can be located within the area enclosed by the perimeter of the first pole piece 110, or protrude a certain length from the perimeter of the first pole piece 110. In the second embodiment, by performing step S1, an annular electrical insulation film 160 is laminated on the second pole piece 120 so that one end of the electrical insulation film 160 extends to the inner side of the perimeter of the second pole piece 120, and the other end of the electrical insulation film 160 extends to the outer side of the perimeter of the second pole piece 120.

[0037] In this embodiment, the electrical insulation film 160 is a PI film. The thickness of the electrical insulation film 160 can be 10 μm. It can be understood that the polyimide (i.e., Polyimide, PI) film has excellent high temperature resistance, corrosion resistance, hydrolysis resistance and electrical insulation properties, and can be thinned, thus reducing the thickness dimension of the battery cell structure containing the PI film. Of course, it is not excluded that the electrical insulation film 160 uses other film materials with excellent electrical insulation properties.

[0038] The electrical insulation film 160 can be adhesively bonded to the first pole piece 110 or the second pole piece 120 with glue, or can be fixed to the first pole piece 110 or the second pole piece 120 by hot pressing. Taking the electrical insulation film 160 being laminated on the second pole piece 120 as an example, the electrical insulation film 160 is in a square frame shape. The inner peripheral part of the electrical insulation film 160 is located on the surface of the second pole piece 120 and is attached to the second pole piece 120, and the outer peripheral part of the electrical insulation film 160 is located outside the peripheral edge of the second pole piece 120 and is in a suspended state.

[0039] In this embodiment, as Figure 8 shown, step S2, that is, the step of forming the glue frame 140 on the first pole piece 110 or the first pole piece 110 with the electrical insulation film 160, specifically includes the following steps: Step S21: Manufacture the glue frame 140 on the first pole piece 110 or the first pole piece 110 with the electrical insulation film 160 by screen printing or transfer printing.

[0040] Step S22: Turn over the first pole piece 110 with the glue frame 140 on one side.

[0041] Step S23: Form the glue frame 140 on the turned-over first pole piece 110 by screen printing or transfer printing so that both sides of the first pole piece 110 contain the glue frame 140.

[0042] In step S21, an existing screen printing mechanism can be used to print the glue frame 140 on the first pole piece 110 or the first pole piece 110 with the electrical insulation film 160, or a transfer roller can be used to transfer the glue frame 140 on the tape film to the first pole piece 110 or the first pole piece 110 with the electrical insulation film 160.

[0043] In the first embodiment, since the first pole piece 110 is laminated with the electrical insulation film 160, therefore, in the process of manufacturing the glue frame 140, it is necessary to form the glue frame 140 on the first pole piece 110 with the electrical insulation film 160. At this time, the glue frame 140 will be formed on the surface of the electrical insulation film 160, and the inner peripheral edge of the electrical insulation film 160 is located inside the inner peripheral edge of the glue frame 140, and the outer peripheral edge of the electrical insulation film 160 is located outside the inner peripheral edge of the glue frame 140.

[0044] In the second embodiment, since the second pole piece 120 is laminated with the electrical insulation film 160, therefore, in the work of manufacturing the glue frame 140, it is necessary to form the glue frame 140 on the first pole piece 110 without the electrical insulation film 160. At this time, the glue frame 140 will be formed on the surface of the first pole piece 110 or the solid electrolyte film 130 on the first pole piece 110.

[0045] Since the battery cell structure generally includes multiple first electrode plates 110 and multiple second electrode plates 120, the first electrode plates 110 and the second electrode plates 120 are stacked in an interleaved manner, and there is a glue frame 140 between any two adjacent first electrode plates 110. Therefore, it is necessary that the glue frame 140 can be formed on one side of the first electrode plate 110, or the glue frame 140 can be formed on both sides of the first electrode plate 110.

[0046] In the work of manufacturing the glue frames 140 on both sides of the first electrode plate 110 respectively, after the glue frame 140 is manufactured on one side of the first electrode plate 110, the first electrode plate 110 can be turned over by 180° through an existing turning device, so as to manufacture the glue frame 140 on the other side of the first electrode plate 110 by means of screen printing or transfer printing. In addition, in order to accelerate the formation speed of the glue frame 140 and improve the forming effect of the glue frame 140, the just-formed glue frame 140 can be cured.

[0047] In step S3, that is, in the step of stacking the first electrode plate 110 containing the electrical insulation film 160 and the glue frame 140 with the second electrode plate 120, or stacking the first electrode plate 110 containing the glue frame 140 with the second electrode plate 120 containing the electrical insulation film 160 to obtain the battery cell structure, the stacking and laminating work between the first electrode plate 110 and the second electrode plate 120 is completed by an existing laminating device, so as to obtain a battery cell structure with both the glue frame 140 and the electrical insulation film 160.

[0048] The battery cell structure includes a plurality of first electrode plates 110 and a plurality of second electrode plates 120, and a solid electrolyte film 130 is provided on the first electrode plate 110 or the second electrode plate 120. Since the plurality of first electrode plates 110 and the plurality of second electrode plates 120 are stacked in an interleaved manner in the up and down direction, the two surfaces of the solid electrolyte film 130 are respectively attached to the first electrode plate 110 and the second electrode plate 120, that is, a layer of solid electrolyte film 130 is sandwiched between any two adjacent first electrode plates 110 and second electrode plates 120.

[0049] The first electrode plate 110 and the second electrode plate 120 are sheet-shaped electrode plates, and their polarities are opposite. If the first electrode plate 110 is a negative electrode plate, then the second electrode plate 120 is a positive electrode plate; if the first electrode plate 110 is a positive electrode plate, then the second electrode plate 120 is a negative electrode plate. In the battery cell structure, the number of the first electrode plates 110 and the number of the second electrode plates 120 can be set according to the actual design situation, and no specific limitation is made here.

[0050] The solid electrolyte membrane 130 can be disposed on the surface of the first electrode sheet 110 or on the surface of the second electrode sheet 120. Therefore, the setting position of the solid electrolyte membrane 130 can be set according to actual production requirements. The thickness of the solid electrolyte membrane 130 is selected according to actual production requirements and is not specifically limited herein. When stacking multiple first electrode sheets 110 and multiple second electrode sheets 120, one layer of the solid electrolyte membrane 130 covers two surfaces of the first electrode sheet 110 or two surfaces of the second electrode sheet 120.

[0051] Since the surface size of the first electrode sheet 110 is larger than that of the second electrode sheet 120, in the up-and-down stacking operation, the periphery of the first electrode sheet 110 is located outside the periphery of the second electrode sheet 120. The solid electrolyte membrane 130 can completely cover the surface of the first electrode sheet 110, as shown in Figure 9 , Figure 11 , Figure 13 and Figure 16 . It can also completely cover the surface of the second electrode sheet 120, as shown in Figure 10 , Figure 12 and Figure 14 . Of course, it can also be that the surface size of the solid electrolyte membrane 130 is larger than that of the second electrode sheet 120 and smaller than that of the first electrode sheet 110, such that the periphery of the solid electrolyte membrane 130 is located outside the periphery of the second electrode sheet 120 and inside the periphery of the first electrode sheet 110, as shown in Figure 15 .

[0052] In the battery cell structure, the glue frame 140 on the first electrode sheet 110 is disposed around the periphery of the solid electrolyte membrane 130, such that the overall glue frame 140 is annular when viewed in the up-and-down direction, and the annular glue frame 140 encloses the outer periphery of the second electrode sheet 120. When multiple first electrode sheets 110 and multiple second electrode sheets 120 are stacked, one layer of the glue frame 140 is formed on two surfaces (which can be the upper surface and the lower surface) of the first electrode sheet 110.

[0053] In some embodiments, the solid electrolyte membrane 130 is formed on the surface of the first electrode sheet 110. In a specific example, the inner periphery of the glue frame 140 can be fitted to the periphery of the solid electrolyte membrane 130, that is, the solid electrolyte membrane 130 is embedded in the inner periphery of the glue frame 140, as shown in Figure 15 . In another specific example, the outer periphery of the glue frame 140 is flush with the periphery of the solid electrolyte membrane 130, as shown in Figure 9 , Figure 11 , Figure 13 and Figure 16As shown. Of course, in other examples, it is not excluded that the outer periphery of the glue frame 140 is located outside the periphery of the solid electrolyte membrane 130, and the inner periphery of the glue frame 140 is located inside the periphery of the solid electrolyte membrane 130.

[0054] In some embodiments, the glue frame 140 is attached to the surface of the first pole piece 110. The inner periphery of the glue frame 140 is located on the surface of the first pole piece 110, and the outer periphery of the glue frame 140 does not exceed the periphery of the first pole piece 110. In a specific example, the outer periphery of the glue frame 140 is flush with the periphery of the first pole piece 110, as Figures 9 to 16 shown; of course, in other examples, it is not excluded that the outer periphery of the glue frame 140 is located inside the periphery of the first pole piece 110, and there is a certain horizontal distance between the outer periphery of the glue frame 140 and the periphery of the first pole piece 110.

[0055] Since the glue frame 140 surrounds the outer periphery of the second pole piece 120, the inner periphery of the glue frame 140 is basically in contact with the periphery of the second pole piece 120. However, due to process errors, there is a certain gap 150 in the horizontal direction between the inner periphery of the glue frame 140 and the periphery of the second pole piece 120, as Figure 1 、 Figures 9 to 16 shown. In the isostatic pressing process, this gap 150 will collapse, resulting in a short circuit problem between the first pole piece 110 and the second pole piece 120 after collapse. Therefore, by adding an electrical insulating film 160 between the first pole piece 110 and the second pole piece 120, the electrical insulating film 160 extends along the periphery of the second pole piece 120 to form an annular structure. Moreover, one end of the electrical insulating film 160 extends to the inside of the periphery of the second pole piece 120, and the other end of the electrical insulating film 160 extends to the outside of the periphery of the second pole piece 120 and contacts the glue frame 140.

[0056] It can be understood that since the inner periphery of the electrical insulating film 160 is located inside the periphery of the second pole piece 120, after the stacking work is completed, one end of the electrical insulating film 160 can be attached to the surface of the solid electrolyte membrane 130 and the surface of the first pole piece 110 respectively, or attached to the surface of the solid electrolyte membrane 130 and the surface of the second pole piece 120 respectively, so that one end of the electrical insulating film 160 is fixedly arranged; at the same time, since the outer periphery of the electrical insulating film 160 is located outside the periphery of the second pole piece 120, after the stacking work is completed, the other end of the electrical insulating film 160 can contact or be fixedly connected to the glue frame 140. In the battery cell structure, the electrical insulating film 160 can play a role in separating the first pole piece 110 and the second pole piece 120 at the gap 150 between the glue frame 140 and the second pole piece 120 and preventing conductive short circuits.

[0057] The horizontal distance between the inner peripheral edge of the electrical insulation film 160 and the peripheral edge of the second pole piece 120, and the horizontal distance between the outer peripheral edge of the electrical insulation film 160 and the peripheral edge of the second pole piece 120 can be selected according to actual design requirements. The thickness of the electrical insulation film 160 can be set according to the actual design situation, and no specific limitation is made here. The outer peripheral edge of the electrical insulation film 160 can be located inside the outer peripheral edge of the glue frame 140, or can be flush with the outer peripheral edge of the glue frame 140. Of course, in other embodiments, it is not excluded that the outer peripheral edge of the electrical insulation film 160 is located outside the outer peripheral edge of the glue frame 140.

[0058] When multiple first pole pieces 110 and at least one second pole piece 120 are stacked and laminated, an annular electrical insulation film 160 is provided on each side of each second pole piece 120. The electrical insulation film 160 is located between the first pole piece 110 and the second pole piece 120. A glue frame 140 is provided on one surface or two surfaces of each first pole piece 110. A solid electrolyte film 130 is provided between adjacent first pole pieces 110 and second pole pieces 120.

[0059] When a first pole piece 110 and a second pole piece 120 are stacked one above the other in sequence, an annular electrical insulation film 160 is provided on the side of the second pole piece 120 close to the first pole piece 110. A ring-shaped glue frame 140 is provided on the side of the first pole piece 110 close to the second pole piece 120. A solid electrolyte film 130 is provided between the first pole piece 110 and the second pole piece 120. One end of the electrical insulation film 160 extending to the outside of the second pole piece 120 overlaps on the upper surface of the glue frame 140.

[0060] In some embodiments, at least one surface of the electrical insulation film 160 is provided with an adhesive layer. When one surface of the electrical insulation film 160 is provided with an adhesive layer, one end of the electrical insulation film 160 can be directly attached to the first pole piece 110 or the second pole piece 120 through the viscosity of the adhesive layer. When both surfaces of the electrical insulation film 160 are provided with adhesive layers, one end of the electrical insulation film 160 can be respectively attached between the first pole piece 110 and the second pole piece 120. Of course, in other embodiments, no adhesive layer is provided on the surface of the electrical insulation film 160, and one end of the electrical insulation film 160 can be fixed to the first pole piece 110 or the second pole piece 120 through a hot pressing process.

[0061] In a specific embodiment, an adhesive layer is provided on the connection surface of the electrical insulation film 160 in contact and laminated with the second pole piece 120. Specifically, an adhesive layer is provided on one surface of the annular electrical insulation film 160, and the adhesive layer is arranged close to the inner peripheral edge of the electrical insulation film 160, so that the electrical insulation film 160 can be directly attached to the second pole piece 120 through the adhesive layer, and no adhesive layer is provided on the surface of the electrical insulation film 160 extending to the outside of the second pole piece 120.

[0062] In the battery cell structure provided in the first embodiment, as Figure 9 shown, solid electrolyte films 130 are formed on both surfaces of the first electrode sheet 110. The solid electrolyte films 130 cover the surfaces of the first electrode sheet 110. Rubber frames 140 are provided on both sides of the first electrode sheet 110. The rubber frames 140 are formed on the surfaces of the solid electrolyte films 130. The peripheries of the solid electrolyte films 130 are flush with the peripheries of the first electrode sheet 110 and the outer peripheries of the rubber frames 140 respectively. The electrical insulation film 160 is laminated on the surface of the second electrode sheet 120.

[0063] Moreover, one end of the electrical insulation film 160 laminated on both sides of the second electrode sheet 120 extends to the inner area of the periphery of the second electrode sheet 120 and is respectively attached to the surface of the solid electrolyte film 130 and the surface of the second electrode sheet 120; at the same time, the other end of the electrical insulation film 160 laminated on both sides of the second electrode sheet 120 extends to the outer area of the periphery of the second electrode sheet 120, and they are attached to each other and fixedly connected to the contact surface between two adjacent rubber frames 140. That is, the two adjacent rubber frames 140 jointly clamp the other end of the electrical insulation film 160 located on both sides of the second electrode sheet 120.

[0064] In the battery cell structure provided in the second embodiment, as Figure 10 shown, solid electrolyte films 130 are provided on both surfaces of the second electrode sheet 120. The solid electrolyte films 130 cover the surfaces of the second electrode sheet 120. The peripheries of the solid electrolyte films 130 are flush with the peripheries of the second electrode sheet 120. Rubber frames 140 are formed on both surfaces of the first electrode sheet 110. The electrical insulation film 160 is laminated on the surface of the solid electrolyte film 130 on the second electrode sheet 120.

[0065] Moreover, one end of the electrical insulation film 160 laminated on both sides of the second electrode sheet 120 extends to the inner area of the periphery of the second electrode sheet 120 and is respectively attached to the surface of the solid electrolyte film 130 and the surface of the first electrode sheet 110; the other ends of the electrical insulation films 160 located on both sides of the second electrode sheet 120 extend to the outer area of the periphery of the second electrode sheet 120, and they are attached to each other and fixedly connected to the contact surface between two adjacent rubber frames 140.

[0066] In the battery cell structure provided in the third embodiment, as Figure 11 shown, solid electrolyte films 130 are provided on both surfaces of the first electrode sheet 110. The solid electrolyte films 130 cover the surfaces of the first electrode sheet 110. One side of the first electrode sheet 110 is provided with a rubber frame 140. The rubber frame 140 is formed on the surface of the solid electrolyte film 130. The peripheries of the solid electrolyte films 130 are flush with the peripheries of the first electrode sheet 110 and the outer peripheries of the rubber frames 140 respectively. The electrical insulation film 160 is laminated on the surface of the second electrode sheet 120.

[0067] Moreover, one end of the electrical insulating films 160 laminated on both sides of the second electrode sheet 120 extends to the inner region of the peripheral edge of the second electrode sheet 120, and is respectively attached to the surface of the solid electrolyte film 130 and the surface of the second electrode sheet 120; at the same time, the other ends of the electrical insulating films 160 laminated on both sides of the second electrode sheet 120 extend to the outer region of the peripheral edge of the second electrode sheet 120, and are attached to each other and fixedly connected to the surface of the glue frame 140 away from its corresponding first electrode sheet 110, that is, the surface of the glue frame 140 on the first electrode sheet 110 and the solid electrolyte film 130 on another first electrode sheet 110 jointly sandwich the other ends of the electrical insulating films 160 located on both sides of the second electrode sheet 120.

[0068] It can be understood that in the third embodiment, the glue frame 140 is only formed on one side of the first electrode sheet 110, and the thickness dimension of the glue frame 140 is equal to the vertical distance between two adjacent first electrode sheets 110.

[0069] In the battery cell structure provided in the fourth embodiment, as Figure 12 shown, solid electrolyte films 130 are provided on both surfaces of the second electrode sheet 120, the solid electrolyte films 130 cover the surface of the second electrode sheet 120, a glue frame 140 is provided on one side of the first electrode sheet 110, the glue frame 140 is formed on the surface of the first electrode sheet 110, and the peripheral edge of the solid electrolyte film 130 is flush with the peripheral edge of the second electrode sheet 120.

[0070] Moreover, one end of each of the electrical insulating films 160 laminated on both sides of the second electrode sheet 120 extends to the inner region of the peripheral edge of the second electrode sheet 120, and is respectively attached to the surface of the solid electrolyte film 130 and the surface of the first electrode sheet 110; the other ends of the electrical insulating films 160 located on both sides of the second electrode sheet 120 extend to the outer region of the peripheral edge of the second electrode sheet 120, and are attached to each other and fixedly connected to the surface of the glue frame 140 away from its corresponding first electrode sheet 110, that is, the surface of the glue frame 140 on the first electrode sheet 110 and the surface of another first electrode sheet 110 jointly sandwich the other ends of the electrical insulating films 160 located on both sides of the second electrode sheet 120.

[0071] It can be understood that in the fourth embodiment, the glue frame 140 is only formed on one side of the first electrode sheet 110, and the thickness dimension of the glue frame 140 is equal to the vertical distance between two adjacent first electrode sheets 110.

[0072] In the battery cell structure provided in the fifth embodiment, as Figure 13As shown, solid electrolyte membranes 130 and electrical insulating membranes 160 are provided on both sides of the first electrode sheet 110. The solid electrolyte membranes 130 cover the surface of the first electrode sheet 110, and the electrical insulating membranes 160 are laminated on the surface of the solid electrolyte membranes 130. A glue frame 140 is provided on one side of the first electrode sheet 110, and the glue frame 140 is formed on the surface of the electrical insulating membrane 160. The peripheries of the solid electrolyte membranes 130 are flush with the peripheries of the first electrode sheet 110 and the outer peripheries of the glue frame 140 respectively.

[0073] Moreover, one end of the electrical insulating membrane 160 laminated on the first electrode sheet 110 extends to the inner area of the periphery of the second electrode sheet 120 and is respectively attached to the surface of the solid electrolyte membrane 130 and the surface of the second electrode sheet 120; at the same time, the other end of the electrical insulating membrane 160 laminated on the first electrode sheet 110 extends to the outer area of the periphery of the second electrode sheet 120 and is respectively attached to the surface of the solid electrolyte membrane 130 and the surface of the glue frame 140.

[0074] In the battery cell structure provided in the sixth embodiment, as Figure 14 shown, electrical insulating membranes 160 are provided on both sides of the first electrode sheet 110, the electrical insulating membranes 160 are laminated on the surface of the first electrode sheet 110, a glue frame 140 is provided on one side of the first electrode sheet 110, the glue frame 140 is formed on the surface of the electrical insulating membrane 160, solid electrolyte membranes 130 are provided on both sides of the second electrode sheet 120, the solid electrolyte membranes 130 cover the surface of the second electrode sheet 120, and the peripheries of the solid electrolyte membranes 130 are flush with the peripheries of the second electrode sheet 120.

[0075] Moreover, one end of the electrical insulating membrane 160 laminated on the first electrode sheet 110 extends to the inner area of the periphery of the second electrode sheet 120 and is respectively attached to the surface of the solid electrolyte membrane 130 and the surface of the first electrode sheet 110; at the same time, the other end of the electrical insulating membrane 160 laminated on the first electrode sheet 110 extends to the outer area of the periphery of the second electrode sheet 120 and is respectively attached to the surface of the first electrode sheet 110 and the surface of the glue frame 140.

[0076] In the battery cell structure provided in the seventh embodiment, as Figure 15 shown, solid electrolyte membranes 130 and electrical insulating membranes 160 are provided on both sides of the first electrode sheet 110, the solid electrolyte membranes 130 cover the surface of the first electrode sheet 110, the peripheries of the solid electrolyte membranes 130 are located inside the peripheries of the first electrode sheet 110, the electrical insulating membranes 160 are respectively laminated on the surface of the solid electrolyte membranes 130 and the surface of the first electrode sheet 110, and glue frames 140 are provided on both sides of the first electrode sheet 110, and the glue frames 140 are formed on the surface of the electrical insulating membranes 160.

[0077] Moreover, one end of the electrical insulating film 160 laminated on the first pole piece 110 extends to the inner region of the periphery of the second pole piece 120 and is respectively attached to the surface of the solid electrolyte film 130 and the surface of the second pole piece 120; at the same time, the other end of the electrical insulating film 160 laminated on the first pole piece 110 extends to the outer region of the periphery of the second pole piece 120 and is respectively attached to the surface of the first pole piece 110 and the surface of the glue frame 140.

[0078] It can be understood that, based on Embodiment VII, the glue frame 140 may be formed only on one side of the first pole piece 110.

[0079] In the battery cell structure provided in Embodiment VIII, as Figure 16 shown, the solid electrolyte film 130, the electrical insulating film 160, and the glue frame 140 are provided on both sides of the first pole piece 110. The solid electrolyte film 130 covers the surface of the first pole piece 110. The electrical insulating film 160 is laminated on the surface of the solid electrolyte film 130. The glue frame 140 is formed on the surface of the electrical insulating film 160. The peripheries of the solid electrolyte film 130 are flush with the periphery of the first pole piece 110 and the outer periphery of the glue frame 140 respectively.

[0080] Moreover, one end of the electrical insulating film 160 laminated on the first pole piece 110 extends to the inner region of the periphery of the second pole piece 120 and is respectively attached to the surface of the solid electrolyte film 130 and the surface of the second pole piece 120; at the same time, the other end of the electrical insulating film 160 laminated on the first pole piece 110 extends to the outer region of the periphery of the second pole piece 120 and is respectively attached to the surface of the solid electrolyte film 130 and the surface of the glue frame 140.

[0081] Step S1, that is, the step of laminating the annular electrical insulating film 160 on the first pole piece 110 or the second pole piece 120, includes step S11: cutting the strip of the electrical insulating film 160 to obtain the annular or strip-shaped electrical insulating film 160. Of course, it is also possible to cut the sheet-shaped electrical insulating film 160 to obtain the corresponding electrical insulating film 160.

[0082] As Figure 3 shown, in Embodiment I, step S1, that is, the step of laminating the annular electrical insulating film 160 on the first pole piece 110 or the second pole piece 120, specifically includes the following steps: Step S11A: cutting the strip of the electrical insulating film 160 to obtain the annular electrical insulating film 160.

[0083] Step S12A; laminating the electrical insulating film 160 on the first pole piece 110 or the second pole piece 120.

[0084] Step S13A: Turn over the first pole piece 110 with an electrically insulating film 160 on one side or the second pole piece 120 with an electrically insulating film 160 on one side.

[0085] Step S14A: Laminate the electrically insulating film 160 on the turned-over first pole piece 110 or the turned-over second pole piece 120, so that both sides of the first pole piece 110 or both sides of the second pole piece 120 contain the electrically insulating film 160.

[0086] In step S11A, the annular electrically insulating film 160 can be die-cut on the strip of the electrically insulating film 160 by using a laser die-cutting method or a cutter die-cutting method, which is convenient for directly laminating the electrically insulating film 160 on the first pole piece 110 or the second pole piece 120 subsequently, and making the electrically insulating film 160 and the first pole piece 110 or the electrically insulating film 160 and the second pole piece 120 be concentrically arranged.

[0087] In step S12A and step S14A, the electrically insulating film 160 can be laminated on the first pole piece 110 or the second pole piece 120 by an adhesive bonding method or a hot pressing method, so that the electrically insulating film 160 can be stably fixed on the first pole piece 110 or the second pole piece 120, enabling the second pole piece 120 with the electrically insulating film 160 to be stacked with the first pole piece 110 containing the glue frame 140, or enabling the first pole piece 110 with both the electrically insulating film 160 and the glue frame 140 to be stacked with the second pole piece 120 (without the electrically insulating film 160).

[0088] Since both surfaces of the first pole piece 110 or both surfaces of the second pole piece 120 need to be laminated with the electrically insulating film 160, therefore, the first pole piece 110 or the second pole piece 120 needs to be turned over by 180° through a turning-over process, so that the electrically insulating film 160 can be alternately adhered to both surfaces of the first pole piece 110 or both surfaces of the second pole piece 120, which is convenient for subsequently stacking the second pole piece 120 and the first pole piece 110 alternately.

[0089] As Figure 4 shown, in the second embodiment, step S1, that is, the step of laminating the annular electrically insulating film 160 on the first pole piece 110 or the second pole piece 120, specifically includes the following steps: Step S11B: Cut the strip of the electrically insulating film 160 to obtain a strip-shaped electrically insulating film 160.

[0090] Step S12B: Arrange and laminate the electrically insulating film 160 along the perimeter of the first pole piece 110 or the perimeter of the second pole piece 120.

[0091] Step S13B: Turn over the first pole piece 110 with an electrically insulating film 160 on one side or the second pole piece 120 with an electrically insulating film 160 on one side.

[0092] Step S14B: Arrange and laminate the electrically insulating film 160 along the perimeter of the turned-over first pole piece 110 or the perimeter of the turned-over second pole piece 120, so that both sides of the first pole piece 110 or both sides of the second pole piece 120 contain the electrically insulating film 160.

[0093] In step S11B, the tape of the electrically insulating film 160 can also be accurately cut by a laser die-cutting method or a cutter die-cutting method to obtain multiple strip-shaped electrically insulating films 160, which is convenient for subsequently arranging the multiple strip-shaped electrically insulating films 160 corresponding to the four sides of the first pole piece 110 or the four sides of the second pole piece 120 respectively. For example, two electrically insulating films 160 corresponding to the long side of the second pole piece 120 can be cut first, and then two electrically insulating films 160 corresponding to the short side of the second pole piece 120 can be cut.

[0094] In step S12B and step S14B, the electrically insulating film 160 can also be fixedly connected to the first pole piece 110 or to the second pole piece 120 by an adhesive bonding method or a hot pressing method. For example, in the lamination process of the electrically insulating film 160, two electrically insulating films 160 corresponding to the long side of the second pole piece 120 are laminated on one surface of the second pole piece 120 first, and then two electrically insulating films 160 corresponding to the short side of the second pole piece 120 are laminated; then, the second pole piece 120 is turned over by 180°, and the lamination process of the electrically insulating film 160 is carried out for the long side and the short side of the second pole piece 120 respectively, so that both surfaces of the second pole piece 120 are laminated with a ring-shaped electrically insulating film 160.

[0095] Specifically, as Figure 5 shown, step S11, that is, the step of cutting the tape of the electrically insulating film 160, specifically includes the following steps: Step S111: Continuously convey the tape of the electrically insulating film 160.

[0096] Step S112: Cut the tape by a laser die-cutting method to obtain the electrically insulating film 160.

[0097] Among them, in step S111, the continuous conveying function of the strip can be realized by simultaneously unwinding and rewinding the strip, so that the strip can move to the cutting station, facilitating continuous and rapid cutting of the required frame-shaped or strip-shaped electrical insulating film 160. Moreover, during the cutting process, the waste strip can be wound up, enabling the strip to quickly move to the cutting station for the next cutting operation without waiting for the cleaning time of the waste after cutting, effectively preventing the lamination efficiency and cutting efficiency of the electrical insulating film 160 from being reduced due to the removal of the waste after cutting. In step S112, a non-contact laser die-cutting method is used to cut the strip, eliminating the need to set up a die-cutting mold, which can improve the cutting accuracy and prevent deformation or damage of the electrical insulating film 160.

[0098] More specifically, as Figure 6 shown, step S111, that is, the step of continuously conveying the strip of the electrical insulating film 160, specifically includes the following steps: Step S1111: Unwind the strip of the electrical insulating film 160.

[0099] Step S1112: Peel and wind up the release film on the strip; wherein, an adhesive layer is provided on the surface of the strip facing the release film.

[0100] Step S1113: Wind up the waste strip after cutting.

[0101] Since the surface of the strip is provided with an adhesive layer, facilitating the bonding and fixing of the cut electrical insulating film 160 to the first pole piece 110 or the second pole piece 120 through the adhesive layer, during the unwinding process of the strip, it is necessary to peel and wind up the release film on the strip, eliminating the need to perform release film peeling on the cut electrical insulating film 160.

[0102] It can be understood that in some examples, the adhesive layer covers the entire surface of the strip; then, the electrical insulating film 160 can be directly pasted on the first pole piece 110; or, one end of the electrical insulating film 160 on both sides of the second pole piece 120 is pasted on the second pole piece 120, and the other end of the electrical insulating film 160 extends to the outer periphery of the second pole piece 120 and is pasted to each other. In other examples, the adhesive layer is provided at the middle position of the strip in the width direction, enabling one end of the electrical insulating film 160 to be bonded to the second pole piece 120 through the adhesive layer.

[0103] In some embodiments, as Figure 7 shown, after step S11, that is, the step of cutting the strip of the electrical insulating film 160, the following steps are further included: Step S15: Vacuum adsorb the cut electrical insulating film 160.

[0104] Step S16: Perform vacuum adsorption on the first pole piece 110 or the second pole piece 120.

[0105] Step S17: Turn the vacuum-adsorbed electrical insulation film 160 downward and move it downward relative to the first pole piece 110 or the second pole piece 120, so as to paste the electrical insulation film 160 on the first pole piece 110 or the second pole piece 120.

[0106] In the process of laminating the electrical insulation film 160, for the cut electrical insulation film 160, the vacuum adsorption method can be used to stably fix and transfer the electrical insulation film 160; at the same time, the first pole piece 110 or the second pole piece 120 is fixed by the vacuum adsorption method to prevent the first pole piece 110 or the second pole piece 120 from shifting relative to the electrical insulation film 160 during the lamination process, which affects the lamination effect.

[0107] In order to avoid affecting the conveying of the strip, the vacuum adsorption station is arranged below the strip. Therefore, the cut electrical insulation film 160 can move downward under the action of gravity and vacuum adsorption and be transferred to the vacuum adsorption station. At this time, the first pole piece 110 or the second pole piece 120 is located below the electrical insulation film 160. Therefore, it is necessary to turn the electrical insulation film 160 downward so that the electrical insulation film 160 and the first pole piece 110 or the second pole piece 120 are arranged relatively in the up-down direction; then, make the electrical insulation film 160 and the first pole piece 110 or the electrical insulation film 160 and the second pole piece 120 move relatively in the up-down direction, so that the electrical insulation film 160 can be laminated on the first pole piece 110 or laminated on the second pole piece 120.

[0108] After the electrical insulation film 160 is laminated on one side of the first pole piece 110, the first pole piece 110 is turned over, and then by performing Step S15 to Step S17, the electrical insulation film 160 is also laminated on the other side of the first pole piece 110. Similarly, after the electrical insulation film 160 is laminated on one side of the second pole piece 120, the second pole piece 120 is turned over, and then by performing Step S15 to Step S17, the electrical insulation film 160 is also laminated on the other side of the second pole piece 120.

[0109] When using the core manufacturing method based on frame lamination according to the first aspect embodiment of the present invention, by manufacturing an annular glue frame 140 on the first pole piece 110, laminating an annular electrical insulation film 160 on the second pole piece 120, and then stacking the first pole piece 110 with the glue frame 140 and the second pole piece 120 with the electrical insulation film 160 up and down, a battery cell structure containing both the glue frame 140 and the electrical insulation film 160 can be manufactured.

[0110] Alternatively, by sequentially forming an annular electrical insulating film 160 and an annular glue frame 140 on the first electrode plate 110, and then stacking the first electrode plate 110 with both the electrical insulating film 160 and the glue frame 140 on the second electrode plate 120, a battery cell structure with both the glue frame 140 and the electrical insulating film 160 can be obtained.

[0111] Through the process of stacking and laminating the first electrode plate 110 and the second electrode plate 120, it is promoted that the glue frame 140 on the first electrode plate 110 is arranged around the periphery of the solid electrolyte film 130 between the first electrode plate 110 and the second electrode plate 120 and encloses the outer periphery of the second electrode plate 120, which is beneficial to ensuring a good lamination effect between the electrode plates and obtaining a certain electrical insulation effect; at the same time, it can also promote one end of the electrical insulating film 160 to be located between the first electrode plate 110 and the second electrode plate 120, and the other end of the electrical insulating film 160 extends to the outside of the periphery of the second electrode plate 120 and contacts the glue frame 140, so that the electrical insulating film 160 can play a role in separating the first electrode plate 110 and the second electrode plate 120 at the gap 150 between the glue frame 140 and the second electrode plate 120, so as to strengthen the electrical insulation effect and effectively avoid the problem of short circuit between the first electrode plate 110 and the second electrode plate 120 caused by the collapse of the gap 150 between the glue frame 140 and the adjacent second electrode plate 120 under the isostatic pressing process.

[0112] Such as Figures 1 to 18 As shown, the core manufacturing device based on glue frame lamination according to the second aspect embodiment of the present invention can be applied to a solid-state battery production line and is used to implement the core manufacturing method based on glue frame lamination as in the first aspect embodiment, complete the lamination work between the glue frame 140 and the first electrode plate 110 and the lamination work between the electrical insulating film 160 and the first electrode plate 110 or the second electrode plate 120, so as to manufacture a battery cell structure containing both the glue frame 140 and the electrical insulating film 160. Moreover, the battery cell structure has the advantages of high safety and high quality.

[0113] The core manufacturing device based on glue frame lamination includes a first forming unit, a second forming unit 330, and a lamination unit 340.

[0114] It should be noted that the installation positions of the first forming unit, the second forming unit 330, and the lamination unit 340 are not limited and can be selected according to the actual layout situation, and no specific limitation is made here. In addition, the transfer work of the first electrode plate 110 and the second electrode plate 120 can be realized by manual means or by a manipulator handling method.

[0115] The first forming unit can execute step S1 in the core manufacturing method based on glue frame lamination of the first aspect embodiment. Specifically, the first forming unit is used to laminate an annular electrical insulating film 160 on the first electrode plate 110 or the second electrode plate 120.

[0116] It can be understood that the first forming unit can laminate the electrical insulating film 160 on the first pole piece 110 or the second pole piece 120 by means of hot pressing, or can drive the electrical insulating film 160 to move towards the first pole piece 110 or the second pole piece 120 by means of vacuum adsorption, and laminate it on the first pole piece 110 or the second pole piece 120 by means of adhesion. At this time, an adhesive layer is provided on the surface of the electrical insulating film 160 in contact with the first pole piece 110 or the second pole piece 120.

[0117] The second forming unit 330 can execute step S2 in the core making method based on adhesive frame lamination in the first aspect embodiment. Specifically, the second forming unit 330 is used to form an adhesive frame 140 on the first pole piece 110 or the first pole piece 110 containing the electrical insulating film 160, so that the outer peripheral edge of the adhesive frame 140 is located inside the peripheral edge of the first pole piece 110 or flush with the peripheral edge of the first pole piece 110.

[0118] It can be understood that the second forming unit 330 can laminate the adhesive frame 140 on the surface of the first pole piece 110 or on the first pole piece 110 containing the electrical insulating film 160 by means of transfer printing or screen printing. For example, the second forming unit 330 transfers the formed adhesive frame 140 on the tape film to the first pole piece 110 by means of hot pressing.

[0119] In this embodiment, the second forming unit 330 includes a printing device and a curing device. Among them, the printing device can execute step S21 and step S23 in the core making method based on adhesive frame lamination in the first aspect embodiment. Specifically, the printing device is used to manufacture the adhesive frame 140 on the first pole piece 110 or the first pole piece 110 containing the electrical insulating film 160. The curing device is used to cure the adhesive frame 140 on the first pole piece 110.

[0120] It can be understood that the printing device is an existing screen printing device or transfer printing device, and those skilled in the art should understand its specific structure and working principle, which will not be elaborated here. The curing device can perform drying and curing treatment on the adhesive frame 140 on the first pole piece 110 by means of ultraviolet irradiation curing or infrared heating, etc., so as to promote the faster formation of the adhesive frame 140 on the first pole piece 110 and with good forming effect. In addition, when it is necessary to form adhesive frames 140 on both surfaces of the first pole piece 110, a turning device can be provided to turn over the first pole piece 110 so that the printing device can manufacture adhesive frames 140 on both sides of the first pole piece 110. The turning device can execute step S22 in the core making method based on adhesive frame lamination in the first aspect embodiment.

[0121] For example, the second forming unit 330 is provided with a printing loading station 331, a printing station 332, a printing unloading station 333, and a curing station 334. Among them, the printing device is correspondingly arranged with the printing station 332, and the curing device is correspondingly arranged with the curing station 334. When printing the glue frame 140 on the first pole piece 110, the first pole piece 110 to be printed can be transferred to the printing loading station 331, and the first pole piece 110 that has completed printing can be transferred to the printing unloading station 333. After completing the printing work of the glue frame 140, the first pole piece 110 will be sent to the curing station 334 to complete the curing work of the glue frame 140.

[0122] In addition, in order to improve the degree of automation, the second forming unit 330 further includes a second conveying device for conveying the first pole piece 110. The number of the second conveying devices is not limited to one, and multiple ones can be configured according to actual situations. The structure of the second conveying device includes a vacuum adsorption component and a driving component. Among them, the vacuum adsorption component is a vacuum chuck or a vacuum adsorption plate, which can stably adsorb the first pole piece 110. The driving component can be a two-axis linear module, a three-axis linear module, or a multi-axis robotic arm. The driving component is configured to be able to drive the vacuum adsorption component to move so as to transfer the first pole piece 110 adsorbed by vacuum to an appropriate station.

[0123] The lamination unit 340 can execute step S3 in the core manufacturing method based on glue frame lamination in the first aspect embodiment. Specifically, the lamination unit 340 is used to stack the first pole piece 110 containing the electrical insulation film 160 and the glue frame 140 with the second pole piece 120, or stack the first pole piece 110 containing the glue frame 140 with the second pole piece 120 containing the electrical insulation film 160 to obtain a battery cell structure.

[0124] Among them, a solid electrolyte film 130 is attached between the first pole piece 110 and the second pole piece 120 in the battery cell structure. The glue frame 140 is arranged around the periphery of the solid electrolyte film 130 and encloses the outer periphery of the second pole piece 120. One end of the electrical insulation film 160 extends to the inner side of the periphery of the second pole piece 120, and the other end extends to the outer side of the periphery of the second pole piece 120 and contacts the glue frame 140.

[0125] It can be understood that the lamination unit 340 can be an existing lamination device, which can stack the first pole piece 110 containing the electrical insulation film 160 and the glue frame 140 and the second pole piece 120 alternately in sequence, or stack the first pole piece 110 containing the glue frame 140 and the second pole piece 120 containing the electrical insulation film 160 alternately in sequence.

[0126] In some examples, the lamination unit 340 can stack a first pole piece 110 containing a glue frame 140 and a second pole piece 120 containing an electrical insulation film 160 to form a composite sheet, and then cut the composite sheet. This arrangement facilitates subsequent lamination of multiple composite sheets in the vertical direction by existing lamination equipment, thereby obtaining a battery cell structure that simultaneously contains the glue frame 140 and the electrical insulation film 160.

[0127] In other examples, the lamination unit 340 can stack multiple first pole pieces 110 and multiple second pole pieces 120 vertically to obtain a battery cell structure that simultaneously contains the glue frame 140 and the electrical insulation film 160.

[0128] In still other examples, the lamination unit 340 can stack two first pole pieces 110 and one second pole piece 120 vertically to form a pole piece combination unit. This facilitates subsequent staggered lamination of multiple pole piece combination units and multiple second pole pieces 120 with electrical insulation films 160 by existing lamination equipment to produce a battery cell structure that simultaneously contains the glue frame 140 and the electrical insulation film 160.

[0129] In some embodiments, as Figure 17 and Figure 18 shown, the first forming unit includes a first conveying device, a film forming device 310, and a film lamination device 320.

[0130] The first conveying device is used to transfer the first pole piece 110 or the second pole piece 120 to convey the first pole piece 110 or the second pole piece 120 to the corresponding station and complete the corresponding processing procedures, such as the film lamination procedure. It can be understood that the number of the first conveying devices is not limited to one, and multiple ones can be configured according to the actual situation. The structure of the first conveying device includes a vacuum adsorption component and a driving component. Among them, the vacuum adsorption component is a vacuum suction cup or a vacuum adsorption plate, which can meet the condition of stably adsorbing the first pole piece 110 or the second pole piece 120. The driving component can be a two-axis linear module, a three-axis linear module, or a multi-axis robotic arm. The driving component is configured to be able to drive the vacuum adsorption component to move so as to transfer the first pole piece 110 or the second pole piece 120 adsorbed by vacuum to an appropriate station.

[0131] The film forming device 310 can execute step S11A and step S11B in the core manufacturing method based on glue frame lamination in the first aspect of the embodiment. Specifically, the film forming device 310 is used to cut out the electrical insulation film 160 in a frame shape or a strip shape.

[0132] It can be understood that the film forming device 310 can manufacture the frame-shaped electrical insulating film 160 or the strip-shaped electrical insulating film 160 by means of laser cutting or die cutting with a cutter. For example, the film forming device 310 can adopt a laser die-cutting mechanism, which can cut out the frame-shaped electrical insulating film 160 on the sheet-shaped electrical insulating film 160, facilitating the subsequent direct lamination of the frame-shaped electrical insulating film 160 on the first pole piece 110 or the second pole piece 120. Four strip-shaped electrical insulating films 160 need to be provided and arranged respectively corresponding to the four sides of the first pole piece 110 or the four sides of the second pole piece 120, so that the four electrical insulating films 160 jointly form an annular structure.

[0133] In this embodiment, the film forming device 310 includes an unwinding mechanism 312, a cutting mechanism 311, a first winding mechanism 313, and a second winding mechanism 314.

[0134] The unwinding mechanism 312 can perform step S1111 in the core-making method based on glue frame lamination in the first aspect embodiment. Specifically, the unwinding mechanism 312 is used to unwind the tape of the electrical insulating film 160.

[0135] The cutting mechanism 311 is used to cut the unwound tape to obtain the frame-shaped or strip-shaped electrical insulating film 160.

[0136] The first winding mechanism 313 can perform step S1113 in the core-making method based on glue frame lamination in the first aspect embodiment. Specifically, the first winding mechanism 313 is used to wind up the waste tape after cutting.

[0137] The second winding mechanism 314 can perform step S1112 in the core-making method based on glue frame lamination in the first aspect embodiment. Specifically, the second winding mechanism 314 is used to peel and wind up the release film on the tape. Wherein, the surface of the tape facing the release film is provided with an adhesive layer, and the release film can protect the adhesive layer on the tape. Before the tape needs to be cut, the release film needs to be peeled off and wound up, which is convenient for subsequent unified treatment of the release film. At the same time, it is also convenient for the cut electrical insulating film 160 to be pasted on the first pole piece 110 or the second pole piece 120, without the need to fix the electrical insulating film 160 on the first pole piece 110 or the second pole piece 120 by means of hot pressing.

[0138] It can be understood that the unwinding mechanism 312 is an existing unwinder, and the first winding mechanism 313 and the second winding mechanism 314 are existing winders. Those skilled in the art should understand their specific structures and working principles, which will not be specifically described herein. Under the coordinated work of the unwinding mechanism 312, the first winding mechanism 313 and the second winding mechanism 314, the tape of the electrical insulating film 160 can be continuously released and moved to the cutting station below the cutting mechanism 311. At the same time, the release film on the tape is peeled off, and the tape waste can be wound up. In addition, several roller shafts can be arranged between the unwinding mechanism 312 and the first winding mechanism 313 to adjust the tightness and extension direction of the tape.

[0139] In some examples, one surface of the tape is covered with an adhesive layer, and the adhesive layer extends along the extension direction of the tape and also extends along the width direction of the tape. In other examples, an adhesive layer is provided on one surface of the tape, and the adhesive layer extends along the extension direction of the tape and is located at the middle position in the width direction of the tape, so that the electrical insulating film 160 in a frame structure cut out subsequently can be directly pasted on the first pole piece 110 or the second pole piece 120.

[0140] The cutting mechanism 311 is a laser die-cutting mechanism or a cutter die-cutting mechanism. In some examples, by using the laser die-cutting mechanism, the electrical insulating film 160 in a frame structure can be cut out on the tape; in addition, the electrical insulating film 160 can be adsorbed on the first pole piece 110 or the second pole piece 120 by a vacuum adsorption method, so that the electrical insulating film 160 is directly adhesively bonded to the first pole piece 110 or the second pole piece 120. At this time, an adhesive layer is provided on the connection surface of the electrical insulating film 160 in contact with the first pole piece 110 or the second pole piece 120. In other examples, by using the cutter die-cutting mechanism, the electrical insulating film 160 in a square shape can be cut out on the tape at one time.

[0141] The film laminating device 320 can execute step S12A, step S12B, step S14A and step S14B in the core-making method based on glue frame lamination in the first aspect embodiment. Specifically, the film laminating device 320 is used to laminate the electrical insulating film 160 on the first pole piece 110 or the second pole piece 120. The film laminating device 320 can fix the cut and formed electrical insulating film 160 on the first pole piece 110 or the second pole piece 120 by a pressing method, or can bond the cut and formed electrical insulating film 160 with an adhesive layer on the first pole piece 110 or the second pole piece 120 by a vacuum adsorption method.

[0142] In this embodiment, the film laminating device 320 includes an adsorption mechanism 323, a laminating platform 324, a turning mechanism and a driving mechanism.

[0143] The adsorption mechanism 323 can perform step S15 in the core-making method based on glue frame lamination according to the first aspect embodiment. Specifically, the adsorption mechanism 323 is used to perform vacuum adsorption on the cut electrical insulation film 160. The adsorption mechanism 323 is a vacuum chuck or a vacuum adsorption plate. In this embodiment, the adsorption mechanism 323 is set as a vacuum adsorption plate with multiple adsorption holes on its upper surface. The vacuum adsorption plate is located below the strip, and the cut electrical insulation film 160 is fixed by vacuum adsorption.

[0144] The lamination platform 324 can perform step S16 in the core-making method based on glue frame lamination according to the first aspect embodiment. Specifically, the lamination platform 324 is used to perform vacuum adsorption on the first pole piece 110 or the second pole piece 120, and can support and fix the first pole piece 110 or the second pole piece 120. The lamination platform 324 adopts a vacuum adsorption plate, effectively vacuum adsorbing and fixing the first pole piece 110 or the second pole piece 120, and preventing the first pole piece 110 or the second pole piece 120 from shifting during the lamination process. The lamination platform 324 is located below the adsorption mechanism 323.

[0145] The driving mechanism can perform step S17 in the core-making method based on glue frame lamination according to the first aspect embodiment. Specifically, the driving mechanism is used to drive the adsorption mechanism 323 to perform up-and-down flipping and up-and-down movement, so that the electrical insulation film 160 is laminated with the first pole piece 110 or the second pole piece 120 on the lamination platform 324. The movable end of the driving mechanism is fixedly connected to the adsorption mechanism 323, so as to be able to drive the adsorption mechanism 323 to perform up-and-down flipping by 180° and up-and-down linear movement.

[0146] It can be understood that the driving mechanism includes a rotary driving member and a linear driving member. The rotary driving member can be a rotary cylinder, which can drive the adsorption mechanism 323 to rotate around an axis extending horizontally, so that the upper surface of the electrical insulation film 160 on the adsorption mechanism 323 faces downward and is arranged opposite to the first pole piece 110 or the second pole piece 120. The linear driving member can be a telescopic cylinder, which can drive the adsorption mechanism 323 to move in the up-and-down direction, so that the electrical insulation film 160 on the adsorption mechanism 323 can be pressed on the first pole piece 110 or the second pole piece 120 to complete the work of laminating the electrical insulation film 160 on the first pole piece 110 or the second pole piece 120. When an adhesive layer is provided on the electrical insulation film 160, under the pressing action, the electrical insulation film 160 can be firmly adhered to the first pole piece 110 or the second pole piece 120.

[0147] The turning mechanism can perform step S13A and step S13B in the core-making method based on glue frame lamination of the first aspect embodiment. Specifically, the turning mechanism is used to turn over the first pole piece 110 or the second pole piece 120 on the lamination platform 324, so as to switch the surface of the first pole piece 110 that is laminated with the electrical insulation film 160, or switch the surface of the second pole piece 120 that is laminated with the electrical insulation film 160.

[0148] Since the electrical insulation film 160 needs to be arranged on both sides of the first pole piece 110 or both sides of the second pole piece 120, therefore, the first pole piece 110 or the second pole piece 120 on the lamination platform 324 can be turned over by the turning mechanism, so that both surfaces of the first pole piece 110 or both surfaces of the second pole piece 120 can be laminated with the electrical insulation film 160. The turning mechanism is an existing structure, and it can turn over the first pole piece 110 or the second pole piece 120 by a suction cup or a clamping jaw that can be turned up and down, which will not be elaborated here.

[0149] In addition, in order to facilitate the turning mechanism to turn over the first pole piece 110 or the second pole piece 120 on the lamination platform 324, a translation mechanism such as a telescopic cylinder can be added to drive the lamination platform 324 to move horizontally, so as to avoid the interference of the adsorption mechanism 323 above the lamination platform 324 on the turning work of the first pole piece 110 or the second pole piece 120.

[0150] Taking the electrical insulation film 160 laminated on the second pole piece 120 as an example, in this embodiment, the film lamination device 320 is provided with a first film lamination station 321 and a second film lamination station 322. When the second pole piece 120 is transferred to the first film lamination station 321, the electrical insulation film 160 can be laminated on one surface of the second pole piece 120, such as the top surface; then, the turning mechanism is used to transfer the second pole piece 120 to the second film lamination station 322, and the electrical insulation film 160 is laminated on the other surface of the second pole piece 120, such as the bottom surface.

[0151] It can be understood that the core-making equipment based on glue frame lamination also includes other structural components, such as a feeding device, a discharging device, a deviation correction device, a dimension detection device, and an ear tab gluing device, etc. The foregoing structural components are existing structures and will not be elaborated here. Below, taking the first pole piece 110 as the negative pole piece and forming a glue frame 140, and the second pole piece 120 as the positive pole piece and laminating the electrical insulation film 160 as an example, the usage of the core-making equipment based on glue frame lamination will be described.

[0152] When using the core-making equipment based on frame lamination provided in the first embodiment, first, the positive electrode sheet is transferred from the magazine loading station to the rectification station for rectification processing. Then, it is necessary to prepare the frame-shaped electrical insulation film 160 for the bottom film lamination station and the top film lamination station, mainly by laser cutting to cut out the frame-shaped electrical insulation film 160. After the positive electrode sheet is transferred from the rectification station to the bottom film lamination station, the frame-shaped electrical insulation film 160 is laminated with the positive electrode sheet; immediately afterwards, the positive electrode sheet with the electrical insulation film 160 on one side is flipped and transferred to the top film lamination station to laminate the frame-shaped electrical insulation film 160 on the positive electrode sheet.

[0153] After completing the lamination work between the electrical insulation film 160 and the positive electrode sheet, the positive electrode sheet is successively transferred to the tab gluing station, the gluing shaping station, and the gluing inspection station to successively complete the tab gluing work, the gluing shaping work, and the gluing inspection work. If it is determined that the positive electrode sheet does not meet the standards during the gluing inspection work, NG (i.e., Not good, unqualified) blanking work is carried out; if it is judged that the positive electrode sheet meets the requirements, the positive electrode sheet with the electrical insulation film 160 on both sides is transferred to the stacking station 341.

[0154] At the same time, the negative electrode sheet is successively transferred from the magazine loading station to the rectification station, the printing station 332, the curing station 334, and the inspection station to successively carry out position rectification, frame printing, frame curing, and inspection work. If it is found that the forming quality of the frame 140 on the negative electrode sheet does not meet the standards during the inspection work, NG blanking work is carried out; if it is judged that the negative electrode sheet meets the requirements, the negative electrode sheet with the frame 140 is transferred to the stacking station 341.

[0155] At the stacking station 341, the negative electrode sheet is located below the positive electrode sheet. Through the stacking and compounding process, the negative electrode sheet and the positive electrode sheet jointly form a composite sheet that simultaneously contains the frame 140 and the electrical insulation film 160, and then the composite sheet is transferred from the stacking station 341 to the magazine blanking station.

[0156] As Figure 9 and Figure 10 shown, when stacking, frames 140 are formed on both sides of the negative electrode sheet. Then, after one surface of the negative electrode sheet is formed with a frame 140, the negative electrode sheet needs to be flipped and the negative electrode sheet is successively sent to the rectification station, the printing station 332, the curing station 334, and the inspection station.

[0157] As Figure 11 and Figure 12 shown, when carrying out the stacking process, one surface of the negative electrode sheet is formed with a frame 140, and the thickness of the frame 140 is adapted to the thickness of the positive electrode sheet.

[0158] When using the core-making equipment based on glue frame lamination provided in the second embodiment, compared with the first embodiment, the difference in the process of the second embodiment lies in the stock preparation process of the electrical insulation film 160.

[0159] Specifically, in the second embodiment, the stock preparation of the strip-shaped electrical insulation film 160 is carried out for the bottom film laminating station and the top film laminating station respectively. Four strip-shaped electrical insulation films 160 are mainly cut out by laser cutting. These four electrical insulation films 160 are respectively arranged corresponding to the two long sides and two short sides of the second pole piece 120. When the electrical insulation film 160 is laminated on the second pole piece 120, two of the electrical insulation films 160 can be first attached to the second pole piece 120, and then the other two electrical insulation films 160 are laminated on the second pole piece 120, so that the four electrical insulation films 160 on the second pole piece 120 jointly form an annular structure.

[0160] When using the core-making equipment based on glue frame lamination according to the second aspect embodiment of the present invention, an annular electrical insulation film 160 is formed on the first pole piece 110 or the second pole piece 120 through the first forming unit. An annular glue frame 140 is formed on the first pole piece 110 or the first pole piece 110 with the electrical insulation film 160 through the second forming unit 330. Then, the lamination unit 340 is used to stack the first pole piece 110 containing the glue frame 140 and the second pole piece 120 containing the electrical insulation film 160, or stack the first pole piece 110 and the second pole piece 120 that both contain the glue frame 140 and the electrical insulation film 160, so as to form a battery cell structure.

[0161] At this time, there are a solid electrolyte film 130 and an electrical insulation film 160 between the first pole piece 110 and the second pole piece 120 in the battery cell structure. At the same time, the glue frame 140 is arranged around the circumference of the solid electrolyte film 130 and is enclosed around the outer periphery of the second pole piece 120. The electrical insulation film 160 can separate the first pole piece 110 and the second pole piece 120 at the gap 150 between the inner circumference of the glue frame 140 and the outer wall of the second pole piece 120, thus effectively preventing the risk of collapse at the gap 150 between the glue frame 140 and the adjacent second pole piece 120 under isostatic pressing treatment, which may cause a short circuit between the first pole piece 110 and the second pole piece 120, and improving the safety of the battery cell structure.

[0162] As Figure 17 and Figure 18 shown, the solid-state battery production line according to the third aspect embodiment of the present invention includes the core-making equipment based on glue frame lamination as in the second aspect embodiment.

[0163] It can be understood that the manufacturing process of the solid-state battery includes multiple processing procedures, such as: rolling process, solid-state electrolyte film 130 manufacturing process, electrode sheet cutting process, glue frame manufacturing process, lamination process, and quality inspection process, etc. Each processing procedure is correspondingly equipped with corresponding processing equipment. In this embodiment, only the structure of the core-making equipment in the solid-state battery production line is improved, and no improvement requirements are put forward for other equipment in the solid-state battery production line. Therefore, those skilled in the art should understand the structure and working principle of the remaining processing equipment in the solid-state battery production line, and no further description will be given here.

[0164] By adopting the core-making equipment based on glue frame lamination with the above structure, the solid-state battery production line in this embodiment manufactures a core structure that simultaneously has a glue frame 140 and an electrical insulation film 160. This not only makes the lamination effect between the electrode sheets in the core structure good, but also makes the electrical insulation effect between the electrode sheets in the core structure good, and can avoid the short-circuit situation caused by the collapse of the gap 150 between the glue frame 140 and the second electrode sheet 120, thereby promoting better manufacturing quality of the solid-state battery.

[0165] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means 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 invention. 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.

[0166] Although the embodiments of the present invention 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 purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A core-making method based on glue frame lamination, characterized in that, Including the following steps: Laminating an annular electrical insulating film (160) on the first electrode plate (110) or the second electrode plate (120); Forming a glue frame (140) on the first electrode plate (110) or the first electrode plate (110) containing the electrical insulating film (160), so that the outer periphery of the glue frame (140) is located inside the peripheral edge of the first electrode plate (110) or flush with the peripheral edge of the first electrode plate (110); Stacking the first electrode plate (110) containing the electrical insulating film (160) and the glue frame (140) with the second electrode plate (120), or stacking the first electrode plate (110) containing the glue frame (140) with the second electrode plate (120) containing the electrical insulating film (160) to obtain a battery cell structure; in the battery cell structure, a solid electrolyte film (130) is attached between the first electrode plate (110) and the second electrode plate (120), the glue frame (140) is arranged around the peripheral edge of the solid electrolyte film (130) and encloses the outer periphery of the second electrode plate (120), and one end of the electrical insulating film (160) extends to the inside of the peripheral edge of the second electrode plate (120), and the other end extends to the outside of the peripheral edge of the second electrode plate (120) and contacts the glue frame (140).

2. The core-making method based on glue frame lamination according to claim 1, characterized in that The step of laminating the annular electrical insulating film (160) on the first electrode plate (110) or the second electrode plate (120) includes the following steps: Cutting the strip of the electrical insulating film (160) to obtain an annular electrical insulating film (160); Laminating the electrical insulating film (160) on the first electrode plate (110) or the second electrode plate (120); Turning over the first electrode plate (110) with the electrical insulating film (160) on one side or the second electrode plate (120) with the electrical insulating film (160) on one side; Laminating the electrical insulating film (160) on the turned-over first electrode plate (110) or the turned-over second electrode plate (120), so that both sides of the first electrode plate (110) or both sides of the second electrode plate (120) contain the electrical insulating film (160).

3. The core manufacturing method based on glue frame lamination according to claim 1, characterized in that, The step of laminating the annular electrical insulating film (160) on the first electrode plate (110) or the second electrode plate (120) includes the following steps: Cutting the strip of the electrical insulating film (160) to obtain a strip-shaped electrical insulating film (160); Arranging and laminating the electrical insulating film (160) along the peripheral edge of the first electrode plate (110) or the peripheral edge of the second electrode plate (120); Turning over the first electrode plate (110) with the electrical insulating film (160) on one side or the second electrode plate (120) with the electrical insulating film (160) on one side; Arranging and laminating the electrical insulating film (160) along the peripheral edge of the turned-over first electrode plate (110) or the peripheral edge of the turned-over second electrode plate (120), so that both sides of the first electrode plate (110) or both sides of the second electrode plate (120) contain the electrical insulating film (160).

4. The core manufacturing method based on glue frame lamination according to claim 2 or 3, characterized in that, Cutting the strip of the electrical insulation film (160) includes the following steps: Continuously conveying the strip of the electrical insulation film (160); Cutting the strip by laser die-cutting to obtain the electrical insulation film (160).

5. The core manufacturing method based on glue frame lamination according to claim 4, wherein The continuous conveying of the strip of the electrical insulation film (160) includes the following steps: Unwinding the strip of the electrical insulation film (160); Peeling and winding the release film on the strip; wherein, an adhesive layer is provided on the surface of the strip facing the release film; Winding the waste of the cut strip.

6. The core manufacturing method based on glue frame lamination according to claim 5, wherein, After cutting the strip of the electrical insulation film (160), the following steps are further included: Vacuum adsorbing the cut electrical insulation film (160); Vacuum adsorbing the first pole piece (110) or the second pole piece (120); Turning the vacuum-adsorbed electrical insulation film (160) downward and moving it downward relative to the first pole piece (110) or the second pole piece (120) to paste the electrical insulation film (160) on the first pole piece (110) or the second pole piece (120).

7. The core-making method based on glue frame lamination according to claim 1, characterized in that, Forming a glue frame (140) on the first pole piece (110) or the first pole piece (110) containing the electrical insulation film (160) includes the following steps: Manufacturing a glue frame (140) on the first pole piece (110) or the first pole piece (110) containing the electrical insulation film (160) by screen printing or transfer printing; Turning over the first pole piece (110) with the glue frame (140) on one side; Forming a glue frame (140) on the turned-over first pole piece (110) by screen printing or transfer printing so that both sides of the first pole piece (110) contain the glue frame (140).

8. A core-making device based on glue frame lamination, which is used to implement the core-making method based on glue frame lamination as described in claim 1, characterized in that, Including: A first forming unit for laminating an annular electrical insulation film (160) on the first pole piece (110) or the second pole piece (120); A second forming unit (330) for forming a glue frame (140) on the first pole piece (110) or the first pole piece (110) containing the electrical insulation film (160) so that the outer periphery of the glue frame (140) is located inside the periphery of the first pole piece (110) or flush with the periphery of the first pole piece (110); A lamination unit (340) is configured to laminate the first electrode tab (110) containing the electrically insulating film (160) and the adhesive frame (140) with the second electrode tab (120), or laminate the first electrode tab (110) containing the adhesive frame (140) with the second electrode tab (120) containing the electrically insulating film (160) to obtain a battery cell structure; wherein, a solid electrolyte film (130) is attached between the first electrode tab (110) and the second electrode tab (120) in the battery cell structure, the adhesive frame (140) is disposed around the periphery of the solid electrolyte film (130) and encloses the outer periphery of the second electrode tab (120), and one end of the electrically insulating film (160) extends to the inner side of the periphery of the second electrode tab (120), and the other end extends to the outer side of the periphery of the second electrode tab (120) and contacts the adhesive frame (140).

9. The core-making equipment based on adhesive frame lamination according to claim 8, wherein, The first forming unit includes: A first conveying device configured to transfer the first electrode tab (110) or the second electrode tab (120); A film forming device (310) configured to cut an electrically insulating film (160) into a frame shape or a strip shape; A film laminating device (320) configured to laminate the electrically insulating film (160) on the first electrode tab (110) or the second electrode tab (120).

10. The core making device based on glue frame lamination according to claim 9, characterized in that, The film forming device (310) includes: An unwinding mechanism (312) configured to unwind a strip of the electrically insulating film (160); A cutting mechanism (311) configured to cut the unwound strip to obtain the electrically insulating film (160) in a frame shape or a strip shape; A first winding mechanism (313) configured to wind up the waste strip after cutting; A second winding mechanism (314) configured to peel and wind up the release film on the strip, wherein an adhesive layer is provided on the surface of the strip facing the release film; and / or, The film laminating device (320) includes: An adsorption mechanism (323) configured to perform vacuum adsorption on the cut electrically insulating film (160); A lamination platform (324) configured to perform vacuum adsorption on the first electrode tab (110) or the second electrode tab (120); A driving mechanism configured to drive the adsorption mechanism (323) to perform up-and-down flipping and up-and-down movement so that the electrically insulating film (160) is laminated with the first electrode tab (110) or the second electrode tab (120) on the lamination platform (324); A turning-over mechanism configured to turn over the first electrode tab (110) or the second electrode tab (120) on the lamination platform (324) to switch the surface of the first electrode tab (110) laminated with the electrically insulating film (160), or switch the surface of the second electrode tab (120) laminated with the electrically insulating film (160).

11. A solid-state battery production line, characterized in that, The core manufacturing equipment based on adhesive frame lamination as claimed in any one of claims 8 to 10 is included.

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