Method and device for manufacturing cell unit of solid-state battery

Abstract

The invention provides a manufacturing method and a manufacturing device for a battery cell unit of a solid-state battery. The manufacturing method of the battery cell unit of the solid-state battery comprises the following steps: preparing a positive plate and a negative plate, wherein a solid-state electrolyte layer is arranged on the positive plate and / or the negative plate; placing the negative plate on a gluing station; the positive plate is stacked on the negative plate, so that the solid electrolyte layer is located between the positive plate and the negative plate to form a to-be-glued structure; the to-be-glued structure is fixed and limited; and gluing the to-be-glued structure so as to bond the positive plate and the negative plate into a whole. According to the technical scheme, the manufacturing method of the battery cell unit of the solid-state battery can solve the problem of short circuit easily caused by relative movement of the positive plate and the negative plate in the gluing process in the existing manufacturing method.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and more particularly, to a method and a manufacturing device for manufacturing a cell unit of a solid-state battery. Background Art

[0002] Solid-state batteries, as a leading representative of next-generation battery technologies, have received extensive attention due to their potential advantages in energy density, safety, and cycle life. Compared with traditional liquid electrolyte batteries, solid-state batteries use solid electrolytes, which can effectively avoid the risks of electrolyte leakage and internal short circuits in the battery, while improving the stability and safety of the battery. In the manufacturing process of solid-state batteries, the preparation and assembly of battery electrodes are core steps. Not only precise electrical connection is required between the positive and negative electrodes, but also the structural stability needs to be ensured during subsequent processing to avoid safety issues such as internal short circuits.

[0003] Chinese Patent No. 202410701180.X discloses a method and a manufacturing device for manufacturing a cell of a solid-state battery. During the manufacturing process of the solid-state battery cell, glue is applied to the first electrode to form a glue frame on the first electrode. The first electrode, the solid electrolyte layer, and the second electrode are stacked in sequence, such that the second electrode is embedded in the glue frame and the solid electrolyte layer is sandwiched between the first electrode and the second electrode. In the above cell manufacturing process, the glue frame is formed before the first electrode and the second electrode are stacked. During the process of embedding the second electrode in the glue frame, relative movement will occur between the first electrode and the second electrode. The relative movement of the electrodes will cause the distance between the first electrode and the second electrode to become smaller. In the case where the glue frame fails to effectively fix the edges of the electrodes, direct contact between the electrodes will trigger an internal short circuit. Summary of the Invention

[0004] The main object of the present invention is to provide a method and a manufacturing device for manufacturing a cell unit of a solid-state battery, which can solve the problem that relative movement occurs between the positive and negative electrodes during the glue application process using the existing manufacturing method, easily leading to short circuits.

[0005] To achieve the above object, according to one aspect of the present invention, there is provided a method for manufacturing a cell unit of a solid-state battery, including: preparing a positive electrode and a negative electrode, with a solid electrolyte layer provided on the positive electrode and / or the negative electrode; placing the negative electrode on a glue application station; stacking the positive electrode on the negative electrode such that the solid electrolyte layer is located between the positive electrode and the negative electrode to form a structure to be glued; fixing and limiting the structure to be glued; and performing a glue application operation on the structure to be glued so as to bond the positive electrode and the negative electrode together.

[0006] Through the above arrangement, it is ensured that during the glue application process, the positive electrode and the negative electrode can maintain a stable relative position, reducing movement, deformation, and wrinkles, thereby effectively avoiding the occurrence of short circuit phenomena.

[0007] Furthermore, the steps of gluing the structure to be glued include: gluing a first gluing area of ​​the structure to be glued to form a first glue frame; curing the first glue frame; flipping the structure to be glued; and gluing a second gluing area of ​​the structure to be glued away from the first gluing area to form a second glue frame.

[0008] Through the above arrangement, the positive electrode sheet and the negative electrode sheet can be bonded together.

[0009] Furthermore, the step of applying glue to the first glue coating area of ​​the structure to be glued includes: identifying the first glue coating area; setting a first glue coating path; performing a glue coating operation in the first glue coating area according to the set first glue coating path, and detecting the glue coating amount in real time during the gluing process.

[0010] Through the above settings, the first gluing area on the structure to be glued placed on the gluing station is identified to ensure the accuracy of the gluing range, and then the first gluing path is set according to the identified first gluing area, that is, the first gluing path is planned according to the identified first gluing area, combined with the performance requirements of the solid-state battery and the motion range of the gluing equipment, and gluing is started according to the set first gluing path and the glue amount is detected in real time to ensure that the glue amount meets the set standards. According to the inspection results, the slight deviations that may occur after gluing are corrected or adjusted to reduce the defective rate in subsequent processes.

[0011] Furthermore, the step of identifying the first glue-coated area includes: identifying the outer edge of the negative electrode sheet; identifying the outer edge of the positive electrode sheet; and identifying the area where the outer edge of the negative electrode sheet protrudes beyond the outer edge of the positive electrode sheet as the first glue-coated area.

[0012] Through the above arrangement, it is possible to identify the portion of the edge of the negative electrode sheet protruding from the positive electrode sheet, and this portion of the area is the first glue-coated area.

[0013] Furthermore, the step of applying glue to a second glue coating area on the side of the glue coating structure away from the first glue coating area includes: identifying the second glue coating area; setting a second glue coating path; performing a glue coating operation in the second glue coating area according to the set second glue coating path, and detecting the glue coating amount in real time during the gluing process.

[0014] Through the above settings, gluing is started according to the set second gluing path and the amount of glue applied is detected in real time to ensure that the amount of glue applied meets the set standards. According to the inspection results, minor deviations that may occur after gluing are corrected or adjusted to reduce the defective rate in subsequent processes.

[0015] Furthermore, the step of identifying the second glue-coated area includes: identifying the outer edge of the negative electrode sheet; identifying the outer edge of the positive electrode sheet; and identifying the area where the outer edge of the positive electrode sheet protrudes beyond the outer edge of the negative electrode sheet as the second glue-coated area.

[0016] Through the above arrangement, it is possible to identify the portion of the edge of the positive electrode sheet protruding from the negative electrode sheet, and this portion of the area is the second glue coating area.

[0017] Furthermore, after the step of curing the first glue frame, the following steps are included: detecting the height of the cured first glue frame and removing unqualified products; detecting whether the cured first glue frame covers the first glue coating area and removing unqualified products.

[0018] Through the above settings, highly unqualified ones are eliminated to ensure that the negative electrode sheets do not collapse during the isostatic pressing process. In addition, immediate detection and elimination of unqualified products reduces material waste, avoids additional costs due to rework and re-testing, and improves production efficiency and economic benefits. Checking whether the first glue frame after curing covers the first glue coating area is to ensure that the glue frame can provide sufficient structural support and bonding to prevent the positive and negative electrodes from moving or separating in subsequent isostatic pressing processes, increasing the risk of internal short circuits in the battery.

[0019] Furthermore, after the step of gluing the second gluing area on the side of the glue-coated structure away from the first gluing area, the step includes: curing the second glue frame; detecting the height of the cured second glue frame and removing unqualified products; detecting whether the cured second glue frame covers the second gluing area and removing unqualified products.

[0020] Through the above settings, it can be ensured that the thickness of the glue layer meets the design requirements. Insufficient height may affect the bonding strength of the positive and negative electrodes, resulting in poor battery performance, while too high may cause deformation of the electrodes or increase the thickness of the battery, affecting the packaging and use of the battery. The removal of those with unqualified heights prevents unqualified products from entering subsequent processes, reduces the complexity and cost of subsequent processing, and thus improves the overall yield of the production line. In addition, immediate detection and removal of unqualified products reduces material waste, avoids additional costs due to rework and re-testing, and improves production efficiency and economic benefits. Checking whether the cured second glue frame covers the second glue coating area is to ensure that the glue frame can provide sufficient structural support and bonding to prevent the positive and negative electrodes from moving or separating in subsequent processes such as isostatic pressing, increasing the risk of internal short circuits in the battery.

[0021] Furthermore, before the step of placing the negative electrode sheet on the glue coating station, the negative electrode sheet is positioned and corrected, and before the step of stacking the positive electrode sheet on the negative electrode sheet, the positive electrode sheet is positioned and corrected.

[0022] Through the above settings, it is possible to accurately position and adjust the positive electrode sheet and the negative electrode sheet before they are placed at the gluing station, ensure the positions of the positive electrode sheet and the negative electrode sheet, and ensure that the positive electrode sheet and the negative electrode sheet can be accurately aligned during lamination.

[0023] According to another aspect of the present invention, there is provided a manufacturing device for implementing the manufacturing method of the battery cell unit of the solid-state battery as described above. The manufacturing device includes: a moving part; a gluing mechanism installed on the moving part, the moving part being capable of driving the gluing mechanism to move to the gluing station, and the gluing mechanism being used for performing a gluing operation on the structure to be glued; a positioning mechanism for fixedly limiting the structure to be glued.

[0024] Through the above settings, it is possible to drive the gluing mechanism to move to the gluing station, drive the gluing mechanism to complete the gluing operation, and also fixedly limit the structure to be glued before and during gluing, preventing relative movement between the positive electrode sheet and the negative electrode sheet during gluing, and avoiding short-circuit problems caused by changes in the positions of the electrode sheets during the gluing operation.

[0025] Furthermore, the gluing mechanism includes a detection part and a gluing component. The detection part can identify the first gluing area and the second gluing area, set the first gluing path and the second gluing path, and detect the gluing amount in real time during the gluing process. The gluing component is used for performing a gluing operation on the structure to be glued.

[0026] Through the above settings, it is possible to identify the first gluing area and the second gluing area, ensure that the gluing component can perform the gluing operation at the correct position, and avoid problems such as glue overflow or failure to coat the specified area due to inaccurate position recognition. By setting the first gluing path and the second gluing path, the gluing trajectory can be accurately planned to ensure that the glue is coated in the shape and size required by the design, thereby improving the accuracy and consistency of gluing. The detection part detects the gluing amount in real time during the gluing process, which is crucial for controlling the usage amount of the glue and ensuring the gluing quality. Through a closed-loop control mechanism, the gluing component can dynamically adjust the glue discharging speed, glue flow rate, and gluing pressure according to the gluing amount information fed back by the detection part. Real-time detection and adjustment of the gluing amount can significantly improve the efficiency of the gluing process, reduce the ineffective waiting time during the gluing operation. At the same time, precise gluing under closed-loop control reduces the defective products caused by uneven gluing, improves the yield of the product, and reduces the production cost.

[0027] Furthermore, the positioning mechanism includes: a base, the top of the base forms a gluing station, and the base is configured to be connected to a vacuum pumping device to form a negative pressure; a positioning part, the positioning part is configured to cover and press on the top of the structure to be glued, and both the first gluing area and the second gluing area protrude beyond the outer edge of the positioning part, and the positioning part is in abutting cooperation with the base to fixedly limit the structure to be glued.

[0028] With the above settings, it is possible to prevent the electrode sheet from moving during the gluing process. The positioning portion presses on the top of the structure to be glued and abuts against the base, which can further limit the structure to be glued. Moreover, both the first gluing area and the second gluing area protrude beyond the outer edge of the positioning portion, so that the gluing of the first gluing area and the second gluing area is not affected while limiting the structure to be glued.

[0029] Applying the technical solution of the present invention, prepare the positive electrode sheet and the negative electrode sheet. First, place the negative electrode sheet on the gluing station, and then stack the positive electrode sheet on the negative electrode sheet. Moreover, ensure that the solid electrolyte is located between the positive electrode sheet and the negative electrode sheet to form the structure to be glued. Then, fix and limit the structure to be glued to prevent relative displacement between the positive electrode sheet and the negative electrode sheet. Finally, glue the structure to be glued. The manufacturing method of the present application ensures that during the gluing process, the positive electrode sheet and the negative electrode sheet can maintain a stable relative position, reducing movement, deformation and wrinkles, thereby effectively avoiding the occurrence of short circuit phenomena. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings forming a part of this specification are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0031] Figure 1 shows a flowchart of the manufacturing method of the cell unit of the solid-state battery of the present invention;

[0032] Figure 2 shows a schematic structural view of the structure to be glued of an embodiment of the present invention from one angle;

[0033] Figure 3 shows a schematic structural view of the structure to be glued of an embodiment of the present invention from another angle;

[0034] Figure 4 shows a schematic structural view of the manufacturing device of an embodiment of the present invention from one angle;

[0035] Figure 5 shows a schematic structural view of the manufacturing device of an embodiment of the present invention from another angle;

[0036] Figure 6 shows a schematic structural view of the manufacturing device of an embodiment of the present invention from yet another angle;

[0037] Figure 7 shows Figure 6 an enlarged view of part A;

[0038] Figure 8 shows a schematic structural view of the base of an embodiment of the present invention from one angle;

[0039] Figure 9 shows the Figure 8 cross-sectional view taken along line A-A;

[0040] Figure 10 shows a schematic structural view of a base of an embodiment of the present invention from an angle;

[0041] Figure 11 shows the Figure 10 cross-sectional view taken along line B-B;

[0042] Figure 12 shows the Figure 11 enlarged view at C.

[0043] Among them, the above-mentioned drawings include the following reference numerals:

[0044] 10, structure to be glued; 11, negative tab; 12, positive tab; 20, first glue frame; 30, moving part; 40, gluing mechanism; 41, detection part; 42, gluing assembly; 50, positioning mechanism; 51, base; 511, first bottom plate; 512, second bottom plate; 513, magnet; 52, positioning part; 521, metal block; 60, limiting block; 70, second glue frame. Detailed implementation manners

[0045] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0046] As Figure 1 shown, the present invention provides a method for manufacturing a core unit of a solid-state battery. The method for manufacturing a core unit of a solid-state battery includes: preparing a positive electrode sheet and a negative electrode sheet, and a solid electrolyte layer is provided on the positive electrode sheet and / or the negative electrode sheet; placing the negative electrode sheet on a gluing station; stacking the positive electrode sheet on the negative electrode sheet so that the solid electrolyte layer is located between the positive electrode sheet and the negative electrode sheet to form a structure 10 to be glued; fixing and limiting the structure 10 to be glued; performing a gluing operation on the structure 10 to be glued so that the positive electrode sheet and the negative electrode sheet are bonded together.

[0047] In this embodiment, a solid electrolyte is provided on the positive electrode sheet, or a solid electrolyte is provided on the negative electrode sheet, or a solid electrolyte is provided on both the positive electrode sheet and the negative electrode sheet. Prepare the positive electrode sheet and the negative electrode sheet, first place the negative electrode sheet on the glue coating station, and then stack the positive electrode sheet on the negative electrode sheet, and ensure that the solid electrolyte is located between the positive electrode sheet and the negative electrode sheet to form a structure to be coated with glue 10, and then fix and limit the structure to be coated with glue 10 to prevent the positive electrode sheet and the negative electrode sheet from relative displacement, and finally, coat the structure to be coated with glue 10. The manufacturing method of the present application ensures that the positive electrode sheet and the negative electrode sheet can maintain a stable relative position during the glue coating process, that is, the positive electrode sheet and the negative electrode sheet will not move relative to each other during the glue coating process, reducing movement, deformation and wrinkles, thereby effectively avoiding the occurrence of short circuit.

[0048] It should be noted that the present application fixes and combines the positive and negative electrodes of the solid-state battery by means of glue coating, and the glue also plays the role of structural support between the positive and negative electrodes, preventing the negative electrode from being deformed by force during the subsequent isostatic pressing of the battery cell unit, thereby avoiding damage or even short circuit of the negative electrode.

[0049] In one embodiment of the present invention, the steps of applying glue to the structure to be glued 10 include: applying glue to a first glue-coated area of ​​the structure to be glued 10 to form a first glue frame 20; curing the first glue frame 20; flipping the structure to be glued 10; and applying glue to a second glue-coated area of ​​the structure to be glued 10 away from the first glue-coated area to form a second glue frame 70.

[0050] In this embodiment, the first glue coating area is located on the upper surface of the structure to be glued 10. After the structure to be glued 10 is glued, a first glue frame 20 is formed, and then the first glue frame 20 is cured to form a stable glue frame. Then the structure to be glued 10 is flipped over. At this time, the first glue frame 20 is located on the lower surface of the structure to be glued 10. Then, the second glue coating area is glued to form a second glue frame 70, so that the positive electrode sheet and the negative electrode sheet are bonded together.

[0051] It should be noted that the first plastic frame 20 is U-shaped ( Figure 2 The second plastic frame 70 is a straight line ( Figure 3 (in bold).

[0052] In one embodiment, a solid electrolyte is disposed on the negative electrode sheet, a negative electrode ear 11 is disposed at one end of the negative electrode sheet, and a positive electrode ear 12 is disposed at one end of the positive electrode sheet. After the positive electrode sheet and the negative electrode sheet are stacked, the negative electrode ear 11 and the positive electrode ear 12 are located at opposite ends of the structure to be coated with glue, and the first glue frame 20 is coated on the solid electrolyte on the negative electrode sheet, and the second glue frame 70 is coated on the positive electrode sheet and is located on the side where the positive electrode ear 12 is located.

[0053] In one embodiment of the present invention, the step of applying glue to the first glue coating area of ​​the structure 10 to be glued includes: identifying the first glue coating area; setting a first glue coating path; performing a glue coating operation in the first glue coating area according to the set first glue coating path, and detecting the glue coating amount in real time during the gluing process.

[0054] In this embodiment, the first gluing area on the structure to be glued 10 placed on the gluing station is identified to ensure the accuracy of the gluing range, and then the first gluing path is set according to the identified first gluing area, that is, the first gluing path is planned according to the identified first gluing area, combined with the performance requirements of the solid-state battery and the motion range of the gluing equipment, and gluing is started according to the set first gluing path and the glue amount is detected in real time to ensure that the glue amount meets the set standards. According to the inspection results, minor deviations that may occur after gluing are corrected or adjusted to reduce the defective rate in subsequent processes.

[0055] In one embodiment of the present invention, the step of identifying the first glue coating area includes: identifying the outer edge of the negative electrode sheet; identifying the outer edge of the positive electrode sheet; and identifying the area where the outer edge of the negative electrode sheet protrudes beyond the outer edge of the positive electrode sheet as the first glue coating area.

[0056] In this embodiment, first, the negative electrode sheet placed at the glue coating station is pre-scanned to remove noise in the image and enhance edge contrast. The outer edge of the negative electrode sheet is identified and extracted through image processing algorithms (such as Canny edge detection, Sobel operator, Hough transform, etc.). Image processing technology is also used to identify the outer edge of the positive electrode sheet. The outer edge data of the negative electrode sheet and the positive electrode sheet are compared to identify the portion of the negative electrode sheet edge protruding from the positive electrode sheet. This portion of the area is the first glue coating area.

[0057] In one embodiment, a 3D camera may be used to identify the first gluing area, set the first gluing path, and detect the amount of gluing in real time during the gluing process.

[0058] In one embodiment of the present invention, the step of applying glue to a second glue coating area on the side of the glue coating structure 10 away from the first glue coating area includes: identifying the second glue coating area; setting a second glue coating path; performing a glue coating operation in the second glue coating area according to the set second glue coating path, and detecting the glue coating amount in real time during the gluing process.

[0059] In this embodiment, the second glue - applying area on the structure 10 to be glue - applied placed at the glue - applying station is identified to ensure the accuracy of the glue - applying range. Then, the second glue - applying path is set according to the identified second glue - applying area, that is, according to the identified second glue - applying area, combined with the performance requirements of the solid - state battery and the movement range of the glue - applying equipment, the second glue - applying path is planned. Glue - applying starts according to the set second glue - applying path, and the glue - applying amount is detected in real time to ensure that the glue - applying amount meets the set standard. According to the inspection results, minor deviations that may occur after glue - applying are corrected or adjusted to reduce the defective rate in subsequent processes.

[0060] In one embodiment of the present invention, the steps of identifying the second glue - applying area include: identifying the outer edge of the negative electrode sheet; identifying the outer edge of the positive electrode sheet; and identifying the area where the outer edge of the positive electrode sheet protrudes beyond the outer edge of the negative electrode sheet as the second glue - applying area.

[0061] In this embodiment, first, the negative electrode sheet placed at the glue - applying station is pre - scanned to remove noise in the image and enhance the edge contrast. The outer edge of the negative electrode sheet is identified and extracted through image - processing algorithms (such as Canny edge detection, Sobel operator, Hough transform, etc.). Similarly, the outer edge of the positive electrode sheet is identified using image - processing techniques. The outer - edge data of the negative electrode sheet and the positive electrode sheet are compared, and the part where the edge of the positive electrode sheet protrudes beyond the negative electrode sheet is identified. This part of the area is the second glue - applying area.

[0062] In one embodiment of the present invention, after the step of curing the first glue - frame 20, it includes: detecting the height of the cured first glue - frame 20 and rejecting unqualified products; detecting whether the cured first glue - frame 20 covers the first glue - applying area and rejecting unqualified products.

[0063] In this embodiment, when detecting the height of the cured first glue - frame 20, if the height of the first glue - frame 20 is the same as the thickness of the positive electrode sheet, it is qualified; if the detected height of the cured first glue - frame 20 is greater than or less than the height of the positive electrode sheet, it is unqualified. Unqualified ones in terms of height are rejected to ensure that the negative electrode sheet does not collapse during the isostatic pressing process. In addition, detecting and rejecting unqualified products in a timely manner reduces material waste, avoids additional costs incurred due to rework and re - detection, and improves production efficiency and economic benefits. Detecting whether the cured first glue - frame 20 covers the first glue - applying area is to ensure that the glue - frame can provide sufficient structural support and bonding effect, avoiding the possible movement or separation of the positive and negative electrode sheets in subsequent processes such as isostatic pressing, and increasing the risk of internal short - circuit of the battery.

[0064] In one embodiment of the present invention, after the step of detecting whether the cured first glue - frame 20 covers the first glue - applying area and rejecting unqualified products, it includes: releasing the fixed limit on the structure 10 to be glue - applied, and then discharging the material.

[0065] In one embodiment of the present invention, after the step of applying glue to the second glue application area on the side of the glue application structure 10 away from the first glue application area, the following steps are included: curing the second glue frame 70; detecting the height of the cured second glue frame 70 and rejecting unqualified products; detecting whether the cured second glue frame 70 covers the second glue application area and rejecting unqualified products.

[0066] In this embodiment, by accurately detecting the height of the cured second glue frame 70, it is possible to ensure that the glue layer thickness meets the design requirements. Insufficient height may affect the bonding strength between the positive and negative electrode plates, resulting in poor battery performance, while excessive height may cause deformation of the electrode plates or increase the battery thickness, affecting the battery packaging and use. Rejecting those with unqualified height avoids unqualified products from entering the subsequent processes, reduces the complexity and cost of subsequent processing, and thus improves the overall yield of the production line. In addition, immediately detecting and rejecting unqualified products reduces material waste, avoids additional costs incurred due to rework and re-detection, and improves production efficiency and economic benefits. Detecting whether the cured second glue frame 70 covers the second glue application area is to ensure that the glue frame can provide sufficient structural support and bonding effect, and avoid the positive and negative electrode plates from moving or separating during subsequent processes such as isostatic pressing, increasing the risk of internal short circuit of the battery.

[0067] In one embodiment of the present invention, after the step of detecting whether the cured second glue frame 70 covers the second glue application area and rejecting unqualified products, the following steps are included: releasing the fixed limit on the glue application structure 10 and then discharging the material.

[0068] In one embodiment of the present invention, before the step of placing the negative electrode plate on the glue application station, the following steps are included: performing positioning and deviation correction on the negative electrode plate; before the step of stacking the positive electrode plate on the negative electrode plate, the following steps are included: performing positioning and deviation correction on the positive electrode plate.

[0069] In this embodiment, performing positioning and deviation correction on the positive electrode plate and the negative electrode plate can accurately position and adjust them before placing the positive electrode plate and the negative electrode plate on the glue application station, ensure the positions of the positive electrode plate and the negative electrode plate, and ensure that the positive electrode plate and the negative electrode plate can be accurately aligned when laminating.

[0070] In one embodiment of the present invention, the value range of the glue application height H of the first glue application area and the second glue application area is: 100μm ≤ H ≤ 300μm, and the value range of the glue application width W of the first glue application area and the second glue application area is: 300μm ≤ W ≤ 500μm.

[0071] In this embodiment, the value range of the glue application height ensures that the glue layer has sufficient thickness, thereby ensuring a firm bond between the positive electrode sheet and the negative electrode sheet and improving the structural stability of the battery cell unit. The setting of the value range of the glue application width can effectively isolate the direct contact between the positive electrode sheet and the negative electrode sheet and prevent internal short circuits.

[0072] In summary, the manufacturing method of the present application can accurately position the structure 10 to be glue-applied. At the same time, it can correct the dimensional deformation of the electrode sheet itself, perform trajectory planning in real time, continuously apply glue, and detect the glue application amount in real time after glue application and perform real-time deviation correction.

[0073] Referring to Figures 2 to 12 As shown, according to another aspect of the present invention, a manufacturing device is provided. The manufacturing device is used to implement the manufacturing method of the battery cell unit of the solid-state battery as described above. The manufacturing device includes: a moving part 30; a glue application mechanism 40 installed on the moving part 30. The moving part 30 can drive the glue application mechanism 40 to move to the glue application station. The glue application mechanism 40 is used to perform a glue application operation on the structure 10 to be glue-applied; a positioning mechanism 50 for fixing and limiting the structure 10 to be glue-applied.

[0074] In this embodiment, the moving part 30 can drive the glue application mechanism 40 to move to the glue application station and drive the glue application mechanism 40 to move to complete the glue application operation. The positioning mechanism 50 is used to fix and limit the structure 10 to be glue-applied before and during the glue application process, prevent relative movement between the positive electrode sheet and the negative electrode sheet during the glue application process, and avoid short circuit problems caused by changes in the position of the electrode sheet during the glue application operation.

[0075] Referring to Figures 2 to 12 As shown, in an embodiment of the present invention, the glue application mechanism 40 includes a detection part 41 and a glue application component 42. The detection part 41 can identify the first glue application area and the second glue application area, set the first glue application path and the second glue application path, and detect the glue application amount in real time during the glue application process. The glue application component 42 is used to perform a glue application operation on the structure 10 to be glue-applied.

[0076] In this embodiment, the detection part 41 can identify the first glue application area and the second glue application area to ensure that the glue application component 42 can perform the glue application operation at the correct position, avoiding problems such as glue overflow or failure to coat the specified area due to inaccurate position recognition. By setting the first glue application path and the second glue application path, the glue application trajectory can be accurately planned to ensure that the glue is coated in the shape and size required by the design, thereby improving the accuracy and consistency of the glue application.

[0077] The detection unit 41 detects the glue application amount in real time during the glue application process, which is crucial for controlling the usage amount of glue and ensuring the glue application quality. Through the closed-loop control mechanism, the glue application assembly 42 can dynamically adjust the glue output speed, glue flow rate, and glue application pressure according to the glue application amount information fed back by the detection unit 41. Real-time detection and adjustment of the glue application amount can significantly improve the efficiency of the glue application process, reduce the ineffective waiting time during the glue application operation. At the same time, precise glue application under closed-loop control reduces the defective products caused by uneven glue application, improves the yield rate of products, and reduces the production cost.

[0078] In one embodiment, the glue application assembly 42 may adopt a glue application device in the prior art, and the specific structure will not be elaborated here.

[0079] In one embodiment, the moving part 30 is a four-axis robot, the detection unit 41 is a 3D camera, and the glue application assembly 42 or the 3D camera is placed at a specific angle so that the glue outlet of the glue application assembly 42 coincides with the center of the field of view of the 3D camera, and this center is located at the center of the rotation axis of the four-axis robot. In this way, when turning to the R corner position of the electrode sheet during glue application, the glue application trajectory planning and glue application operation can be carried out continuously, which can ensure the uniformity and continuity of glue application, and thus improve the glue application efficiency.

[0080] It should be noted that the 3D camera is communicatively connected to the glue application device. While the 3D camera can perform actual trajectory planning, it can also detect the glue application amount. The glue application device can adjust the glue output amount according to the detection result of the glue application amount by the 3D camera, and adjust the amount of glue application in real time through the closed-loop feedback method to achieve the stability and uniformity of glue application.

[0081] Combined with reference to Figures 2 to 12 As shown, in one embodiment of the present invention, the positioning mechanism 50 includes: a base 51, the top of the base 51 forms a glue application station, and the base 51 is configured to be connected to a vacuum pumping device to form a negative pressure; a positioning part 52, the positioning part 52 is configured to cover and press on the top of the structure 10 to be glued, and both the first glue application area and the second glue application area protrude from the outer edge of the positioning part 52, and the positioning part 52 is in abutting cooperation with the base 51 to fixedly limit the structure 10 to be glued.

[0082] In this embodiment, the base 51 forms a glue application station, the positive electrode sheet and the negative electrode sheet are placed on the top surface of the base 51, and the base 51 is connected to a vacuum pumping device to form a negative pressure. The generation of the negative pressure helps the electrode sheet to closely adhere to the base 51 and prevents the electrode sheet from moving during the glue application process. The positioning part 52 covers and presses on the top of the structure 10 to be glued and is in abutting cooperation with the base 51, which can further limit the structure 10 to be glued, and both the first glue application area and the second glue application area protrude from the outer edge of the positioning part 52, which does not affect the glue application to the first glue application area and the second glue application area while limiting the structure 10 to be glued.

[0083] In one embodiment, the positioning portion 52 is a rectangular plate.

[0084] Referring to Figures 2 to 12 As shown, in one embodiment of the present invention, the base 51 includes a first bottom plate 511 and a second bottom plate 512. The positioning mechanism 50 further includes a limiting block 60, a metal block 521, and a magnet 513. The first bottom plate 511 is fixedly installed on the second bottom plate 512. The limiting block 60 is fixedly installed on the first bottom plate 511. The negative electrode sheet and the positive electrode sheet are placed on the first bottom plate 511. The positioning portion 52 covers and presses on the positive electrode sheet. The magnet 513 is embedded in the first bottom plate 511, and the metal block 521 is embedded in the positioning portion 52. The second bottom plate 512 is connected to a vacuum pumping device to stably adsorb the negative electrode sheet after the negative electrode sheet is placed on the first bottom plate 511, preventing the position of the negative electrode sheet from deviating during the process of placing the positive electrode sheet. The limiting block 60 is installed on the first bottom plate 511. The limiting block 60 is U-shaped, and the inner edge of the limiting block 60 coincides with the outer edge of the first glue application area. After the positive electrode sheet and the negative electrode sheet are placed, the positioning portion 52 is placed on the positive electrode sheet, which can flatten and correct the structure to be glued 10, thereby preventing the electrode sheet from being bent and deformed and affecting the glue application quality.

[0085] As can be seen from the above, the present application accurately positions the structure to be glued by combining vacuum adsorption and magnetic adsorption. The positioning portion 52 covers and presses above the structure to be glued. Through the pressure action of the positioning portion 52, the size correction and position retention of the positive electrode sheet and the negative electrode sheet can be performed, thereby reducing the deformation of the positive electrode sheet and the negative electrode sheet during the isostatic pressing process of the subsequent battery cell unit.

[0086] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: Prepare the positive electrode sheet and the negative electrode sheet, first place the negative electrode sheet on the glue application station, and then stack the positive electrode sheet on the negative electrode sheet. Moreover, ensure that the solid electrolyte is located between the positive electrode sheet and the negative electrode sheet to form the structure to be glued, and then fix and limit the structure to be glued to prevent relative displacement between the positive electrode sheet and the negative electrode sheet. Finally, apply glue to the structure to be glued. The manufacturing method of the present application ensures that the positive electrode sheet and the negative electrode sheet can maintain a stable relative position during the glue application process, reducing movement, deformation, and wrinkles, thereby effectively avoiding the occurrence of short-circuit phenomena.

[0087] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0088] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0089] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for manufacturing a solid-state battery cell unit, characterized in that: include: Prepare a positive electrode sheet and a negative electrode sheet, wherein a solid electrolyte layer is provided on the positive electrode sheet and / or the negative electrode sheet; Placing the negative electrode sheet on a glue coating station; The positive electrode sheet is stacked on the negative electrode sheet so that the solid electrolyte layer is located between the positive electrode sheet and the negative electrode sheet to form a structure to be coated with glue (10); Fixing and limiting the structure to be coated with glue (10); The structure to be coated with glue (10) is subjected to a coating operation so that the positive electrode sheet and the negative electrode sheet are bonded together.

2. The method for manufacturing a solid-state battery cell unit according to claim 1, characterized in that: The step of applying glue to the structure to be coated with glue (10) comprises: Applying glue to a first glue-coating area of ​​the structure to be glued (10) to form a first glue frame (20); Performing a curing process on the first glue frame (20); Turning over the structure to be coated with glue (10); Glue is applied to a second glue-coating area of ​​the structure to be glued (10) which is away from the first glue-coating area, to form a second glue frame (70).

3. The method for manufacturing a solid-state battery cell unit according to claim 2, characterized in that: The step of applying glue to the first glue-coating area of ​​the structure to be glued (10) comprises: identifying the first glue-coated area; Setting a first gluing path; Gluing operation is performed in the first gluing area according to the set first gluing path, and the glue amount is detected in real time during the gluing process.

4. The method for manufacturing a solid-state battery cell unit according to claim 3, characterized in that: The step of identifying the first glue-coated area comprises: identifying an outer edge of the negative electrode sheet; identifying an outer edge of the positive electrode sheet; The area where the outer edge of the negative electrode sheet protrudes beyond the outer edge of the positive electrode sheet is identified as the first glue-coated area.

5. The method for manufacturing a solid-state battery cell unit according to claim 2, characterized in that: The step of applying glue to a second glue-coating area of ​​the structure to be glued (10) which is away from the first glue-coating area comprises: identifying the second glue-coated area; Setting the second gluing path; The gluing operation is performed in the second gluing area according to the set second gluing path, and the amount of glue applied is detected in real time during the gluing process.

6. The method for manufacturing a solid-state battery cell unit according to claim 5, characterized in that: The step of identifying the second glue-coated area comprises: identifying an outer edge of the negative electrode sheet; identifying an outer edge of the positive electrode sheet; The area where the outer edge of the positive electrode sheet protrudes beyond the outer edge of the negative electrode sheet is identified as the second glue-coated area.

7. The method for manufacturing a solid-state battery cell unit according to any one of claims 2 to 6, characterized in that: After the step of curing the first plastic frame (20), the following steps are included: Detecting the height of the first glue frame (20) after curing, and removing unqualified products; Check whether the first glue frame (20) after curing covers the first glue coating area, and remove unqualified products.

8. The method for manufacturing a solid-state battery cell unit according to any one of claims 2 to 6, characterized in that: After the step of applying glue to a second glue-coated area of ​​the structure to be glued (10) which is away from the first glue-coated area, the step includes: Performing a curing process on the second glue frame (70); Detecting the height of the second glue frame (70) after curing, and removing unqualified products; Check whether the cured second glue frame (70) covers the second glue coating area, and remove unqualified products.

9. The method for manufacturing a solid-state battery cell unit according to any one of claims 2 to 6, characterized in that: Before the step of placing the negative electrode sheet on the glue coating station, the step includes: positioning and correcting the negative electrode sheet; before the step of stacking the positive electrode sheet on the negative electrode sheet, the step includes: positioning and correcting the positive electrode sheet.

10. A manufacturing device, characterized in that: The manufacturing device is used to implement the method for manufacturing a solid-state battery cell unit according to any one of claims 1 to 9, and the manufacturing device comprises: Moving part (30); A gluing mechanism (40) is installed on the moving part (30), and the moving part (30) can drive the gluing mechanism (40) to move to the gluing station, and the gluing mechanism (40) is used to perform a gluing operation on the structure to be glued (10); The positioning mechanism (50) is used to fix and limit the structure to be coated with glue (10).

11. The manufacturing device according to claim 10, characterized in that: The gluing mechanism (40) comprises a detection unit (41) and a gluing assembly (42), wherein the detection unit (41) is capable of identifying a first gluing area and a second gluing area, setting a first gluing path and a second gluing path, and detecting the amount of glue in real time during the gluing process, and the gluing assembly (42) is used to perform a gluing operation on the structure to be glued.

12. The manufacturing device according to claim 10, characterized in that: The positioning mechanism (50) comprises: A base (51), the top of the base (51) forming the glue coating station, and the base (51) being configured to be connected to a vacuum device to form negative pressure; A positioning portion (52), wherein the positioning portion (52) is constructed to cover the top of the structure to be coated with glue (10), and the first glue coating area and the second glue coating area both protrude from the outer edge of the positioning portion (52), and the positioning portion (52) is abutted and matched with the base (51) to fix and limit the structure to be coated with glue (10).

Images