Edge sealing method and manufacturing equipment for electrode plate of solid-state battery

Abstract

The invention is suitable for the technical field of battery manufacturing, and provides an edge sealing method and manufacturing equipment of a solid-state battery electrode plate. The solid-state battery electrode plate comprises a current collector and a solid-state battery electrode material coated on the current collector, and the edge sealing method comprises the following steps: partially removing the continuously coated electrode material according to a preset shape to obtain a plurality of electrode material areas; a to-be-edge-sealed area of each electrode material area is determined, the current collector corresponding to the to-be-edge-sealed area is coated with an edge sealing material, and the thickness of the edge sealing material is consistent with that of the electrode material. Therefore, edge sealing can be carried out on the periphery of each electrode material area, the problem that edge sealing cannot be carried out in individual directions is solved, the method can be applied to continuous production, and the production efficiency is improved.

Description

Technical Field

[0001] This application belongs to the technical field of battery manufacturing, and particularly relates to a method for sealing the edges of a solid-state battery electrode sheet and a manufacturing apparatus therefor. Background Art

[0002] During the production process of solid-state batteries, the electrode sheet stacking process is often adopted. The lamination process can integrate the components of the battery through the simple stacking of the positive electrode, solid electrolyte, and negative electrode. It is the most suitable integration process for the preparation of all-solid-state batteries, that is, after cutting the positive electrode, solid electrolyte, and negative electrode into specified sizes, they are laminated in sequence and then packaged, or each "positive electrode - solid electrolyte - negative electrode" unit is stacked in sequence for packaging. In the battery lamination process, it is necessary to avoid the breakage of the electrolyte layer and the contact between the edges of the positive and negative electrodes of the battery, which may cause short circuits between the positive and negative electrodes, leading to potential safety hazards such as battery heating and fire.

[0003] Currently, an edge sealing process can be used to form seals around the positive / negative electrode layers. By protecting the edges of the positive and negative electrodes, it is ensured that the edges of the positive and negative electrodes cannot come into direct contact, thereby effectively avoiding the risk of short circuits.

[0004] However, the existing edge sealing process is not mature enough to stably and efficiently seal the positive and negative electrodes.

[0005] Therefore, there is an urgent need for an edge sealing process that can be applied to continuous production and has a high production efficiency. Summary of the Invention

[0006] The embodiments of this application provide a method for sealing the edges of a solid-state battery electrode sheet and a manufacturing apparatus therefor. When manufacturing a solid-state battery electrode sheet, the electrode material of the solid-state battery on the current collector can be partially removed according to a preset shape to obtain a plurality of electrode material regions, and each electrode material region is sealed. This can avoid the problem that edge sealing cannot be performed in individual directions, can be applied to continuous production, and improves production efficiency.

[0007] In a first aspect, the embodiments of this application provide a method for sealing the edges of a solid-state battery electrode sheet, characterized in that the solid-state battery electrode sheet includes a current collector and the electrode material of the solid-state battery coated on the current collector, and the edge sealing method includes: partially removing the electrode material according to a preset shape to obtain a plurality of electrode material regions; determining the edge sealing regions of each electrode material region, and coating a sealing material on the current collector corresponding to the edge sealing regions, the thickness of the sealing material being the same as the thickness of the electrode material.

[0008] In some possible implementation manners, the partial removal of the electrode material according to a preset shape, after which a plurality of electrode material regions are obtained, includes: determining the coating range of the solid-state battery electrode material on the current collector; and based on the coating range and the preset shape, partially removing the electrode material according to a preset rule to obtain a plurality of electrode material regions.

[0009] In some possible implementation manners, the preset rule includes: a sealing edge region to be sealed is included around each of the electrode material regions; the partial removal of the electrode material according to the preset rule based on the coating range and the preset shape to obtain a plurality of electrode material regions includes: when the edge of the coating range coincides with the edge of the current collector, removing the electrode material at the edge of the coating range according to a first preset width; within the coating range, removing the electrode material according to a second preset width at intervals of a target distance in the vertical direction and / or the horizontal direction to obtain a plurality of electrode material regions that conform to the preset shape.

[0010] In some possible implementation manners, determining the sealing edge region to be sealed for each of the electrode material regions includes: determining the region where the electrode material has been removed as the sealing edge region to be sealed; and based on the first preset width, determining the region adjacent to the periphery of each of the electrode material regions but not coated with the solid-state battery electrode material as the sealing edge region to be sealed.

[0011] In some possible implementation manners, the partial removal of the electrode material includes at least one of the following removal methods: frictionally removing the electrode material based on a grinding tool; cutting and removing the electrode material based on a cutting tool; or sintering and removing the electrode material based on a laser tool.

[0012] In some possible implementation manners, the partial removal of the electrode material includes: when performing the partial removal of the electrode material based on any one of the removal methods, controlling the removal parameters corresponding to the removal method so as not to damage the current collector when removing the electrode material.

[0013] In some possible implementation manners, the edge sealing method further includes: when partially removing the electrode material, absorbing and storing the removed electrode material through a dust removal device.

[0014] In the first aspect, when manufacturing a solid-state battery electrode sheet, the electrode material of the solid-state battery on the current collector can be partially removed according to a preset shape to obtain a plurality of electrode material regions, and edge sealing is performed on each of the electrode material regions, so that edge sealing can be performed around each of the electrode material regions, solving the problem that edge sealing cannot be performed in individual directions, and this method can be applied to continuous production to improve production efficiency.

[0015] In a second aspect, an embodiment of the present application provides a manufacturing apparatus for a solid-state battery electrode sheet. The manufacturing apparatus includes: a rewinding and unwinding device, a removing device, and a sealing device; the rewinding and unwinding device includes an unwinding assembly and a rewinding assembly, and the unwinding assembly, the removing device, the sealing device, and the rewinding assembly are connected in sequence; the solid-state battery electrode sheet is placed on the unwinding assembly, and the solid-state battery electrode sheet includes a current collector and an electrode material of the solid-state battery coated on the current collector, and the side of the current collector coated with the electrode material of the solid-state battery faces upward; the solid-state battery electrode sheet is connected to the rewinding assembly after passing through the unwinding assembly, the removing device, and the sealing device, and the unwinding assembly and the rewinding assembly cooperate to move the solid-state battery electrode sheet horizontally from the unwinding assembly to the rewinding assembly; the removing device is configured to partially remove the electrode material in a preset shape when the solid-state battery electrode sheet passes through, to obtain a plurality of electrode material regions; the sealing device is configured to determine a to-be-sealed region for each electrode material region when the solid-state battery electrode sheet passes through, and coat and dry a sealing material on the current collector corresponding to the to-be-sealed region based on a 3D printing technology of the solid-state battery, and the thickness of the sealing material is the same as the thickness of the electrode material.

[0016] In some possible implementation manners, the removing device includes one of: a grinding and removing device, a cutting and removing device, or a laser removing device.

[0017] In some possible implementation manners, the removing device further includes: a dust removal assembly, and the dust removal assembly is configured to absorb and store the removed electrode material when partially removing the electrode material.

[0018] It can be understood that the beneficial effects of the above second aspect can be referred to the relevant descriptions in the above first aspect, and will not be elaborated herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic structural diagram of a solid-state battery electrode sheet;

[0021] Figure 2 It is a schematic structural diagram of a solid-state battery electrode sheet provided by an embodiment of the present application;

[0022] Figure 3 Flow chart of the edge sealing method for the electrode tab of a solid-state battery provided by an embodiment of the present application;

[0023] Figure 4 Schematic structural diagram of the electrode tab of a solid-state battery provided by an embodiment of the present application;

[0024] Figure 5 Schematic structural diagram of the electrode tab of a solid-state battery after partial removal provided by an embodiment of the present application;

[0025] Figure 6 Schematic diagram of the area to be edge-sealed after partial removal of the electrode tab of a solid-state battery provided by an embodiment of the present application;

[0026] Figure 7 Schematic diagram of the electrode tab of a solid-state battery after edge sealing provided by an embodiment of the present application;

[0027] Figure 8 Schematic diagram of the electrode tab of a solid-state battery provided by an embodiment of the present application;

[0028] Figure 9 Schematic structural diagram of the manufacturing equipment for the electrode tab of a solid-state battery provided by an embodiment of the present application;

[0029] Figure 10 Schematic structural diagram of another manufacturing equipment for the electrode tab of a solid-state battery provided by an embodiment of the present application. Detailed implementation manners

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It should be understood that the accompanying drawings in the present invention are only for the purpose of illustration and description, and are not used to limit the protection scope of the present invention. In addition, it should be understood that the schematic drawings are not drawn to actual scale. The flowcharts used in the present invention illustrate the operations implemented according to some embodiments of the present invention. It should be understood that the operations in the flowchart may not be implemented in sequence, and the steps without logical context may be reversed or implemented simultaneously. In addition, those skilled in the art may add one or more other operations to the flowchart or remove one or more operations from the flowchart under the guidance of the content of the present invention.

[0031] In addition, the embodiments described in the present invention are only a part of the embodiments of the present invention, rather than all embodiments. The components of the embodiments of the present invention usually described and illustrated in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0032] It should be noted that like reference numerals and letters denote like items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0034] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0035] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can 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.

[0036] Solid-state batteries are widely used in various fields due to their high energy density, excellent cycling performance, and high safety. These advantages make solid-state batteries an ideal power source for power-consuming devices in various fields, meeting the modern society's requirements for high efficiency, environmental protection, and portability.

[0037] Figure 1 It is a schematic structural diagram of an electrode sheet of a solid-state battery.

[0038] Referring to Figure 1 , the electrode sheet of the solid-state battery includes a current collector, a positive electrode layer, an electrolyte layer, and a negative electrode layer. The positive electrode layer is a positive electrode material coated on the current collector, the electrolyte layer is an electrolyte material covering the positive electrode layer, and the negative electrode layer is a negative electrode material coated on the electrolyte material. It can be determined from Figure 1 that since the range of the electrolyte layer is larger than that of the positive electrode material, the edge of the electrolyte layer may break when stressed, which may lead to contact between the edges of the positive electrode layer and the negative electrode layer, causing potential safety hazards.

[0039] Figure 2 It is a schematic structural diagram of an electrode sheet of a solid-state battery provided by an embodiment of the present application.

[0040] Referring to Figure 2 , by coating a sealing material around the positive electrode material and strengthening the periphery of the positive electrode layer. Among them, the sealing material can be the material used for the electrolyte layer, or it can also be other types of materials with electrolyte properties. In this way, not only can the electrolyte layer be strengthened, but also when problems occur, it can ensure that the positive electrode layer does not come into direct contact with the negative electrode layer, improving the safety of the solid-state battery.

[0041] However, currently, after the electrode sheet of the solid-state battery is cut according to requirements, since the edges of the electrode material at the cutting position are aligned with the edges of the current collector, it is impossible to coat the sealing material. This results in the problem that the cut electrode sheet of the solid-state battery cannot be sealed in some directions and requires manual intervention, making the current sealing process inapplicable to continuous production and resulting in low production efficiency.

[0042] To solve this problem, the present application provides a sealing method and manufacturing equipment for an electrode sheet of a solid-state battery.

[0043] Figure 3 It is a flowchart of a sealing method for an electrode sheet of a solid-state battery provided by an embodiment of the present application.

[0044] Referring to Figure 3 , the electrode sheet of the solid-state battery includes a current collector and the electrode material of the solid-state battery coated on the current collector. The sealing method of the electrode sheet of the solid-state battery includes:

[0045] S310: Partially remove the electrode material according to a preset shape to obtain a plurality of electrode material regions.

[0046] Figure 4 It is a schematic structural diagram of an electrode sheet of a solid-state battery provided by an embodiment of the present application.

[0047] Referring to Figure 4, the current collector is a metal strip made of the metal corresponding to the electrode, and the current collector can be stored in a rolled form. The electrode material of the solid-state battery can be coated on the current collector through a dry electrode manufacturing process or a wet coating manufacturing process. Among them, the electrode material is coated along the horizontal direction of the current collector according to a preset width. After the electrode material is coated, it is flush with the current collector in the horizontal direction, but there is a certain width of free space in the vertical direction.

[0048] Here, taking Figure 4 the structure of the solid-state battery electrode sheet shown in

[0049] In some embodiments, the partial removal of the electrode material according to a preset shape is performed, and after the removal, a plurality of electrode material regions are obtained, including: determining the coating range of the solid-state battery electrode material on the current collector; based on the coating range and the preset shape, partially removing the electrode material according to a preset rule to obtain a plurality of electrode material regions.

[0050] In some embodiments, referring to Figure 4 , Figure 4 the region marked as the electrode material in

[0051] In some embodiments, the preset shape can be determined according to the product form of the solid-state battery electrode sheet. For example, the preset shape can be determined by setting the length and width of the solid-state battery electrode sheet. Referring to Figure 4 , the preset shape can be the same as the coating range in the vertical direction (denoted as the length Y), and the width in the horizontal direction is X.

[0052] In some embodiments, since it is necessary to seal the edges of the periphery of each electrode material region, the preset rule may include: the periphery of each electrode material region includes the region to be sealed.

[0053] Figure 5 FIG. is a schematic structural diagram of the solid-state battery electrode sheet after partial removal provided by an embodiment of the present application.

[0054] In some embodiments, based on the coating range and the preset shape, the electrode material is partially removed according to a preset rule to obtain a plurality of electrode material regions, including: when the edge of the coating range coincides with the edge of the current collector, the electrode material at the edge of the coating range is removed according to a first preset width. Within the coating range, the electrode material is removed according to a second preset width at intervals of a target distance in the vertical direction and / or the horizontal direction to obtain a plurality of electrode material regions that conform to the preset shape.

[0055] Among them, referring to Figure 5 , the edge of the coating range coincides with the edge of the current collector in the horizontal direction. Therefore, the electrode material at the edge of the coating range can be removed according to the first preset width at the left edge and the right edge respectively. The first preset width can be determined according to actual production needs and is not limited herein.

[0056] Continuing to refer to Figure 5 , assuming that the width of the preset shape in the horizontal direction is X, then in the horizontal direction, at intervals of X, the electrode material can be removed according to the second preset width to obtain electrode material region 1, electrode material region 2, and electrode material region 3. The second preset width can be determined according to actual production needs and is not limited herein.

[0057] In some embodiments, the partial removal of the electrode material includes at least one of the following removal methods: friction removal of the electrode material based on a grinding tool; cutting removal of the electrode material based on a cutting tool; or sintering removal of the electrode material based on a laser tool.

[0058] Among them, when performing the electrode material using any one of the removal methods, the removal parameters corresponding to the removal method need to be controlled so as not to damage the current collector when removing the electrode material.

[0059] For example, when frictionally removing the electrode material based on a grinding tool, the removal parameters include the pressure and speed of grinding. When cutting and removing the electrode material based on a cutting tool, the removal parameters include the cutting depth and angle. When sintering and removing the electrode material based on a laser tool, the removal parameters include the power and scanning speed of the laser.

[0060] In some embodiments, when partially removing the electrode material, the removed electrode material can also be absorbed and stored by a dust removal device. The dust removal device can be a negative pressure dust removal device, a vacuum dust removal device, etc., and this application is not limited thereto.

[0061] S320: Determine the edge-sealing regions of each of the electrode material regions, and coat an edge-sealing material on the current collector corresponding to the edge-sealing regions, where the thickness of the edge-sealing material is the same as that of the electrode material.

[0062] In some embodiments, to seal the four sides of each of the electrode material regions, the edge-sealing regions need to surround each of the electrode material regions. Herein, edge-sealing means coating or printing an edge-sealing material around the electrode material, and the edge-sealing regions are used to indicate the regions where the edge-sealing material needs to be coated or printed.

[0063] In some embodiments, the determining the edge-sealing regions of each of the electrode material regions includes: determining the region where the electrode material has been removed as the edge-sealing region; and based on the first preset width, determining the regions adjacent to the four sides of each of the electrode material regions but not coated with the solid-state battery electrode material as the edge-sealing regions.

[0064] Figure 6 FIG. is a schematic diagram of the edge-sealing regions after partial removal of a solid-state battery electrode tab provided in an embodiment of the present application. Figure 7 FIG. is a schematic diagram of a solid-state battery electrode tab after edge-sealing provided in an embodiment of the present application.

[0065] In some embodiments, referring to Figure 6 , for the region where the electrode material has been removed, the region where the electrode material has been removed can be determined as the edge-sealing region. At the same time, to ensure that the four sides of each of the electrode material regions are edge-sealed, it is also necessary to determine the regions adjacent to the four sides of each of the electrode material regions but not coated with the solid-state battery electrode material as the edge-sealing regions. That is, the edge-sealing regions shown in Figure 6 are obtained.

[0066] In some embodiments, an edge-sealing material can be coated on the current collector corresponding to the edge-sealing regions. As an example, referring to Figure 6 and Figure 7 , an edge-sealing device can be used to uniformly coat the edge-sealing material on the edge-sealing regions around the electrode material regions shown in Figure 6 , and ensure that every part of the edge-sealing regions can be completely covered by the edge-sealing material without any gaps, thereby obtaining the current collector (referred to as an electrode composite current collector) including a plurality of edge-sealed electrode material regions shown in Figure 7 . The thickness of the coated edge-sealing material is the same as that of the electrode material.

[0067] In some embodiments, the edge-sealing device can further print an edge-sealing material on the coated edge-sealing material to enhance the bonding force and stability between the edge-sealing material and the electrode material.

[0068] In some embodiments, the electrode composite current collector can also be slit to obtain a solid-state battery electrode tab having edge-sealing materials in all four directions.

[0069] Figure 8 Schematic diagram of a solid-state battery electrode tab provided by an embodiment of the present application.

[0070] In some embodiments, referring to Figure 8 , the electrode composite current collector will be fed into a slitting device. The slitting device will precisely cut the electrode composite current collector into the required shape and size along the direction and dimensions corresponding to the edge-sealing. During this process, the edge-sealing material will be slit together with the electrode material to form Figure 8 the solid-state battery electrode tab having edge-sealing materials in all four directions as shown in . This unique structure can effectively improve the performance and safety of the electrode material, providing a strong guarantee for the efficient operation of the battery.

[0071] An embodiment of the present application also provides a manufacturing apparatus for a solid-state battery electrode tab. Figure 9 Schematic structural diagram of a manufacturing apparatus for a solid-state battery electrode tab provided by an embodiment of the present application. The manufacturing apparatus for the solid-state battery electrode tab can be used to perform an edge-sealing method for the solid-state battery electrode tab.

[0072] Referring to Figure 9 , the manufacturing apparatus includes: a pay-off and take-up device, a removing device 93, and an edge-sealing device 94; the pay-off and take-up device includes a pay-off assembly 91 and a take-up assembly 96, and the pay-off assembly 91, the removing device 93, the edge-sealing device 94, and the take-up assembly 96 are connected in sequence. The solid-state battery electrode tab 92 is placed on the pay-off assembly 91. The solid-state battery electrode tab 92 includes a current collector and the electrode material of the solid-state battery coated on the current collector, and the side of the current collector coated with the electrode material of the solid-state battery faces upward. The solid-state battery electrode tab 92 is connected to the take-up assembly 96 after passing through the pay-off assembly 91, the removing device 93, and the edge-sealing device 94. The pay-off assembly 91 and the take-up assembly 96 cooperate to move the solid-state battery electrode tab 92 horizontally from the pay-off assembly 91 to the take-up assembly 96. The removing device 93 is used to partially remove the electrode material in a preset shape when the solid-state battery electrode tab 92 passes through, to obtain a plurality of electrode material regions. The edge-sealing device 94 is used to determine the edge-sealing regions of each electrode material region when the solid-state battery electrode tab 92 passes through, and coat and dry the edge-sealing material on the current collector corresponding to the edge-sealing regions, and the thickness of the edge-sealing material is the same as the thickness of the electrode material. Finally, the edge-sealed solid-state battery electrode tab 95 is stored in the take-up assembly 96.

[0073] In some possible embodiments, the edge sealing device 94 includes a solid-state battery 3D printing device and a drying device. The edge sealing device 94 can achieve precise printing of points, lines, and surfaces based on the 3D printing technology of solid-state batteries, ensuring that the edge sealing material can be evenly and precisely coated onto the area to be edge-sealed along a specified path. And the printed edge sealing material is dried based on the drying device.

[0074] In some possible embodiments, the edge sealing device 94 can measure the thickness of the edge sealing material through a laser thickness measurement module until the thickness of the printed edge sealing material is the same as that of the electrode material.

[0075] In some possible embodiments, the removing device 93 includes one of a grinding and removing device, a cutting and removing device, or a laser removing device.

[0076] In some possible embodiments, the removing device 93 further includes a dust removal component, which is used to absorb and store the removed electrode material when partially removing the electrode material. As an example, the dust removal component can be a negative pressure dust removal device, a vacuum dust removal device, etc., and the present application does not limit this.

[0077] Figure 10 It is a schematic structural diagram of another manufacturing equipment for a solid-state battery electrode tab provided in an embodiment of the present application.

[0078] Reference Figure 10 , the manufacturing equipment includes: a unwind assembly 1001, a tab printing mechanism 1002, an oven 1003, a roll press 1004, a tab buffer mechanism 1005, a removing device 1006, a vision inspection component 1007, an edge sealing device 1008, and a wind-up assembly 1009 that are connected in sequence.

[0079] In this embodiment, the current collector can be arranged on the unwind assembly 11, and the tab printing mechanism 1002 can print the electrodes of the solid-state battery on the current collector when the current collector passes through, and the electrodes of the solid-state battery on the current collector are baked and roll-pressed through the oven 1003 and the roll press 1004 to obtain a solid-state battery electrode tab. Then, the advancing speed of the solid-state battery electrode tab is slowed down by the tab buffer mechanism 1005, so that the removing device 1006 can partially remove the electrode material according to a preset shape to obtain a plurality of electrode material regions. The vision inspection component 1007 is used to determine the area to be edge-sealed of each electrode material region by collecting images of the electrode material regions, and then the edge sealing device 1008 coats the edge sealing material on the current collector corresponding to the area to be edge-sealed, and the thickness of the edge sealing material is the same as that of the electrode material. Finally, the edge-sealed solid-state battery electrode tab is stored through the wind-up assembly 1009.

[0080] Among them, the unwinding assembly 1001, the removing device 1006, the edge-sealing device 1008 and the winding assembly 1009 are similar to Figure 9 the unwinding assembly 91, the removing device 93, the edge-sealing device 94 and the winding assembly 96 in

[0081] and will not be described in detail herein. The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered that the scope described in this specification is covered.

[0082] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for sealing the edge of a solid-state battery electrode sheet, characterized in that: The solid-state battery electrode plate includes a current collector and an electrode material of a solid-state battery coated on the current collector, and the edge sealing method includes: Partially removing the electrode material according to a preset shape to obtain a plurality of electrode material regions; Determine the edge sealing area of ​​each electrode material area, and apply the edge sealing material to the current collector corresponding to the edge sealing area, wherein the thickness of the edge sealing material is consistent with the thickness of the electrode material.

2. The edge sealing method according to claim 1, characterized in that: The electrode material is partially removed according to a preset shape to obtain multiple electrode material areas, including: Determining a coating range of the solid-state battery electrode material on the current collector; Based on the coating range and the preset shape, the electrode material is partially removed according to preset rules to obtain a plurality of electrode material areas.

3. The edge sealing method according to claim 2, characterized in that: The preset rules include: each of the electrode material areas is surrounded by the area to be sealed; Based on the coating range and the preset shape, the electrode material is partially removed according to preset rules to obtain multiple electrode material areas, including: When the edge of the coating range coincides with the edge of the current collector, removing the electrode material at the edge of the coating range according to a first preset width; In the coating range, the electrode material is removed in the vertical direction and / or the horizontal direction according to a second preset width at every target distance to obtain a plurality of electrode material regions conforming to the preset shape.

4. The edge sealing method according to claim 3, characterized in that: The step of determining the edge sealing area of ​​each electrode material area includes: Determining the area where the electrode material is removed as the area to be edge-sealed; Based on the first preset width, the area adjacent to each of the electrode material areas but not coated with the solid-state battery electrode material is determined as the area to be sealed.

5. The edge sealing method according to any one of claims 2 to 4, characterized in that: The partially removing the electrode material comprises at least one of the following removal methods: Frictionally removing the electrode material based on a grinding tool; Cutting and removing the electrode material based on a tool; or The electrode material is sintered away based on a laser tool.

6. The edge sealing method according to claim 5, characterized in that: The partially removing the electrode material comprises: When the electrode material is removed in any one of the removal methods, the removal parameters corresponding to the removal method are controlled so that the current collector is not damaged when the electrode material is removed.

7. The edge sealing method according to claim 5, characterized in that: The edge sealing method further comprises: When the electrode material is partially removed, the removed electrode material is absorbed and stored by a dust removal device.

8. A manufacturing equipment for a solid-state battery electrode sheet, characterized in that: The manufacturing equipment includes: Rewinding and unwinding device, removal device and edge sealing device; The unwinding and rewinding device comprises an unwinding assembly and a rewinding assembly, wherein the unwinding assembly, the removing device, the edge sealing device and the rewinding assembly are connected in sequence; The solid-state battery electrode sheet is placed on the unwinding assembly, and the solid-state battery electrode sheet includes a current collector and an electrode material of a solid-state battery coated on the current collector, and a side of the current collector coated with the electrode material of the solid-state battery faces upward; The solid-state battery electrode sheet is connected to the winding assembly after passing through the unwinding assembly, the removing device, and the edge sealing device, and the unwinding assembly and the winding assembly cooperate to enable the solid-state battery electrode sheet to move from the unwinding assembly to the winding assembly in a horizontal direction; The removal device is used to partially remove the electrode material according to a preset shape when the solid-state battery electrode plate passes by, so as to obtain multiple electrode material areas; The edge sealing device is used to determine the edge sealing area of ​​each electrode material area when the solid-state battery electrode plate passes by, and based on the 3D printing technology of solid-state batteries, the edge sealing material is applied to the collector corresponding to the edge sealing area and dried, and the thickness of the edge sealing material is consistent with the thickness of the electrode material.

9. The device according to claim 8, characterized in that The removal device comprises: a grinding removal device, a cutting removal device or a laser removal device.

10. The device according to claim 8, characterized in that The removal device further comprises: a dust removal component, and the dust removal component is used to absorb and store the removed electrode material when the electrode material is partially removed.

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