Pole piece printing clamp based on adhesive layer lamination

Abstract

The utility model discloses a pole piece printing clamp based on adhesive layer lamination, and relates to the field of battery manufacturing. The first positioning piece is provided with a positioning groove capable of accommodating and positioning the pole piece group; the second positioning piece is provided with a printing groove and a plurality of liquid passing channels, the two opposite sides of the second positioning piece are provided with a first surface and a second surface correspondingly, the first surface is sunken to form the printing groove, and the liquid passing channels are formed in the groove bottom of the printing groove and penetrate through the second surface; when the first positioning piece is in a first state, the second surface is attached to the first positioning piece, the second surface and the positioning groove define a positioning cavity capable of containing and positioning a pole piece set, and the liquid passing channel communicates with the positioning cavity so that the liquid passing channel can be aligned with a pole piece suspension area of the pole piece set in the positioning cavity; and when the first positioning piece is in the second state, the first positioning piece is separated from the second positioning piece. According to the utility model, the adhesive layer can be efficiently and accurately formed in the pole piece suspension area of the pole piece group, and the problem of short circuit caused by internal collapse of the battery cell module in a pressure test due to the existence of the pole piece suspension area is solved.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and in particular to an electrode printing fixture based on adhesive layer lamination. Background Technology

[0002] Solid-state battery cell modules are composed of multiple electrode groups. A single electrode group is made up of a negative electrode, a solid electrolyte sheet, and a positive electrode stacked together. When two adjacent electrodes are stacked, there will be a suspended area (that is, a redundant area or extra edge part on one of the electrodes). Since the suspended area on each electrode group is a suspended and misaligned structure, the cell module is prone to collapse during pressure testing, which can lead to a short circuit inside the cell module. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an electrode printing fixture based on adhesive layer lamination, which can efficiently and accurately form an adhesive layer in the electrode suspension area of ​​the electrode assembly, solving the problem that the presence of the electrode suspension area easily leads to internal collapse and short circuits in the battery cell module during pressure testing.

[0004] This utility model embodiment provides an electrode printing fixture based on adhesive layer lamination, which includes:

[0005] The first positioning element has a positioning groove for accommodating and positioning the electrode assembly;

[0006] The second positioning component is provided with a printing groove and several liquid passages. The opposite sides of the second positioning component are respectively provided with a first surface and a second surface. The first surface is recessed inward to form the printing groove. The several liquid passages are provided at the bottom of the printing groove and penetrate through the second surface.

[0007] The first positioning member has a first state and a second state. When the first positioning member is in the first state, the first positioning member is attached to the second surface so that the positioning groove and the second surface together define a positioning cavity for accommodating and positioning the electrode assembly, and a plurality of liquid passages are connected to the positioning cavity so that the liquid passages can be aligned with the electrode suspension area of ​​the electrode assembly in the positioning cavity. When the first positioning member is in the second state, the first positioning member and the second positioning member are separated.

[0008] The electrode printing fixture based on adhesive layer lamination according to the present invention has at least the following beneficial effects: When the first positioning member and the second positioning member are used together, the first positioning member is attached to the second surface of the second positioning member, so that the positioning groove of the first positioning member and the second surface together form a positioning cavity. At this time, the electrode group located in the positioning cavity will be positioned and fixed, so that the electrode suspension area on the electrode group is aligned with the liquid passage on the second positioning member. Therefore, the adhesive liquid located in the printing groove can be driven to flow into the positioning cavity through the liquid passage by printing and directly fill the electrode suspension area, so as to achieve efficient and accurate formation of filler in the electrode suspension area. By forming filler in the electrode suspension area of ​​each electrode group of the cell module, the problem of short circuit caused by collapse inside the cell module during the pressure test process is effectively prevented.

[0009] In some embodiments of this utility model, the second positioning member includes a frame portion and a printing liquid passage portion. The printing liquid passage portion is in the shape of a sheet and is connected to the frame portion so that the printing liquid passage portion and the frame portion together form the printing groove. The printing liquid passage portion is provided with a plurality of liquid passage channels.

[0010] In some embodiments of this utility model, the printing liquid passage is a metal plate, the metal plate is provided with a plurality of through holes, the through holes are the liquid passage channels, and respectively penetrate the two sides of the metal plate.

[0011] In some embodiments of this utility model, the printing liquid-passing part is a silk block, the silk block is provided with a liquid-passing area and a liquid-blocking area, the liquid-blocking area is provided with a photosensitive adhesive layer, and the liquid-passing area is the liquid-passing channel.

[0012] In some embodiments of this invention, the photosensitive adhesive layer is located on the side surface of the printing liquid section away from the printing tank.

[0013] In some embodiments of this utility model, the printing liquid section and the frame section are detachably connected.

[0014] In some embodiments of this utility model, two liquid passages are provided, and the two liquid passages are arranged in parallel or perpendicularly connected.

[0015] In some embodiments of this utility model, three liquid passages are provided, and one of the liquid passages is perpendicularly connected to the other two liquid passages respectively.

[0016] In some embodiments of this utility model, the first positioning member is provided with a plurality of vacuum adsorption holes, and the plurality of vacuum adsorption holes are connected to the positioning groove so that the electrode assembly in the positioning groove is adsorbed and fixed.

[0017] In some embodiments of this utility model, the first positioning member is provided in multiple ways, and the second positioning member is provided in multiple sets of liquid passages communicating with the printing tank, with each set of liquid passages corresponding to each first positioning member.

[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the electrode assembly in Example 1 when a filler is formed in the electrode suspension area;

[0020] Figure 2 This is a schematic diagram of the structure of the electrode assembly in Example 2 when a filler is formed in the electrode suspension area;

[0021] Figure 3 This is a three-dimensional structural schematic diagram of the second positioning member provided according to Embodiment 1 of this utility model;

[0022] Figure 4 This is a three-dimensional structural schematic diagram of the first positioning member provided according to an embodiment of the present utility model;

[0023] Figure 5 This is a schematic diagram of the electrode printing fixture based on adhesive layer bonding in the bonding state according to an embodiment of the present utility model;

[0024] Figure 6 This is a schematic diagram of the electrode printing fixture based on adhesive layer bonding provided in the embodiment of the present utility model in the state of filler forming;

[0025] Figure 7 This is a three-dimensional structural schematic diagram of the second positioning member provided according to Embodiment 2 of this utility model;

[0026] Figure 8 This is a three-dimensional structural schematic diagram of the second positioning member provided according to Embodiment 3 of this utility model;

[0027] Figure 9 This is a three-dimensional structural diagram of the second positioning member provided according to Embodiment 4 of this utility model.

[0028] Reference numerals: 100, electrode assembly; 110, negative electrode; 120, positive electrode; 200, filler; 300, first positioning element; 310, substrate; 320, positioning groove; 321, tab positioning area; 330, third surface; 400, second positioning element; 410, frame portion; 420, printing liquid passage portion; 421, liquid passage channel; 430, printing groove; 440, first surface; 450, second surface; 500, filler area. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, it should be understood that features specified as "first" or "second" may explicitly or implicitly include one or more of those features. In the description of this utility model, unless otherwise stated, "several" means one or more, and "multiple" means two or more.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] The following is for reference. Figures 1 to 9 This invention describes an electrode printing fixture based on adhesive layer lamination provided according to an embodiment of the present invention.

[0033] like Figures 1 to 9 As shown, the electrode printing fixture based on adhesive layer lamination according to the present invention can be applied to the manufacturing process of solid-state batteries. It can efficiently and accurately form an adhesive layer in the electrode suspension area of ​​the electrode assembly 100, thereby effectively solving the problem that the presence of the electrode suspension area causes the cell module to easily collapse internally and short-circuit during pressure testing.

[0034] It is understandable that, such as Figure 1As shown, the electrode assembly 100 is formed by stacking a negative electrode 110 and a positive electrode 120, with a solid electrolyte layer sandwiched between the negative electrode 110 and the positive electrode 120. In Embodiment 1, since the area of ​​the negative electrode 110 is larger than that of the positive electrode 120, there will be a suspended electrode area when the negative electrode 110 and the positive electrode 120 are stacked. By filling the suspended electrode area with an adhesive layer, the adhesive layer can be bonded to two adjacent negative electrode 110s during the stacking process, thereby strongly supporting the extra edge portion of the negative electrode 110 and preventing the battery cell module from collapsing at the suspended electrode area during the pressure testing process, which could lead to a short circuit.

[0035] Furthermore, such as Figure 2 As shown, in Embodiment 2, the area of ​​the positive electrode 120 is larger than that of the negative electrode 110. Therefore, there will be a suspended electrode area when the negative electrode 110 and the positive electrode 120 are stacked. By filling the suspended electrode area with an adhesive layer, the adhesive layer can be bonded to two adjacent positive electrode 120s respectively during the stacking process. This can effectively support the extra edge portion of the positive electrode 120, preventing the manufactured cell module from collapsing at the suspended electrode area during the pressure testing process, which would lead to a short circuit.

[0036] like Figures 1 to 6 As shown, the electrode printing fixture based on adhesive layer bonding includes a first positioning element 300 and a second positioning element 400.

[0037] The function of the first positioning member 300 is to support and position the electrode assembly 100. The first positioning member 300 is provided with a positioning groove 320 for accommodating and positioning the electrode assembly 100. Specifically, the first positioning member 300 is a substrate 310, which can be made of metal such as iron. The first positioning member 300 is generally square in shape and has a third surface 330. The third surface 330 is recessed inward to form the positioning groove 320. The shape of the positioning groove 320 is adapted to the shape of the electrode assembly 100. When the electrode assembly 100 is quickly installed in the positioning groove 320 of the first positioning member 300, the electrode suspension area of ​​the electrode assembly 100 can be exposed so that a filler 200 can be formed in the electrode suspension area.

[0038] In this embodiment, the third surface 330 is a plane and is parallel to the bottom surface of the positioning groove 320. The positioning groove 320 allows for the placement and positioning of a flat electrode assembly 100.

[0039] Understandably, when the stacked electrode assembly 100 is placed from top to bottom into the positioning groove 320 of the first positioning member 300, the lower surface of the electrode assembly 100 is in contact with the bottom surface of the positioning groove 320, and the outer peripheral surface of the electrode assembly 100 is in contact with the peripheral wall surface of the positioning groove 320. This prevents the electrode assembly 100 from shifting in the horizontal direction. Moreover, the upper surface of the electrode assembly 100 is flush with the third surface 330 of the first positioning member 300. At this time, the peripheral wall surface of the positioning groove 320 and the electrode assembly 100 together define a filling area 500, which allows the filler 200 to be formed. The filler 200 is an adhesive layer, specifically, it can be a silicone layer or a UV adhesive layer. The UV adhesive is also known as shadowless adhesive, photosensitive adhesive, or ultraviolet curable adhesive.

[0040] In this embodiment, the thickness dimension (i.e., the vertical dimension) of the filling region 500 is the vertical distance between the upper surface of the negative electrode 110 and the upper surface of the positive electrode 120. At this time, the area of ​​the negative electrode 110 is larger than the area of ​​the positive electrode 120. Figure 1 As shown. Further, in another embodiment, the thickness dimension (i.e., the vertical dimension) of the filling region 500 is the vertical distance between the upper surface of the positive electrode 120 and the upper surface of the negative electrode 110. In this case, the area of ​​the positive electrode 120 is larger than the area of ​​the negative electrode 110, as shown. Figure 2 As shown.

[0041] The shape and material of the first positioning element 300 can be set according to actual needs, and no specific limitation is made here. In addition, the positioning groove 320 includes a tab positioning area 321. When the electrode assembly 100 is placed in the positioning groove 320, the tabs on the electrode assembly 100 are located at the tab positioning area 321.

[0042] The function of the second positioning member 400 is to cooperate with the first positioning member 300 to clamp and position the electrode assembly 100 and to position the printing station of the electrode assembly 100. The second positioning member 400 is provided with a printing groove 430 and a plurality of liquid passages 421. Specifically, the second positioning member 400 has a first surface 440 and a second surface 450 on opposite sides, respectively. The first surface 440 is recessed inward to form the printing groove 430. The plurality of liquid passages 421 are provided at the bottom of the printing groove 430 and penetrate the second surface 450, so that one end of the liquid passage 421 is connected to the inside of the printing groove 430 and the other end of the liquid passage 421 is connected to the outside of the printing groove 430.

[0043] In this embodiment, both the first surface 440 and the second surface 450 are planar and are arranged parallel to each other.

[0044] It is understood that the printing tank 430 can hold a certain amount of adhesive liquid. The shape of the printing tank 430 is not limited. It can be a prism-shaped or cylindrical tank. The thickness between the bottom surface of the printing tank 430 and the second surface 450 can be selected according to the actual design situation, and no specific limitation is made here.

[0045] The liquid passage 421 allows the adhesive liquid in the printing tank 430 to flow, enabling the adhesive liquid to flow from inside the printing tank 430 to outside the printing tank 430 via the liquid passage 421. The length and width of the liquid passage 421 are adapted to the filling area 500. Since the filling area 500 is elongated, the liquid passage 421 is also elongated. If the negative electrode 110 and the positive electrode 120 are centrally located, electrode suspension areas are formed on opposite sides of the electrode assembly 100, or electrode suspension areas are formed on three sides of the electrode assembly 100. If one side of the negative electrode 110 is flush with one side of the positive electrode 120, electrode suspension areas are formed on one side of the electrode assembly 100, or electrode suspension areas are formed on adjacent sides of the electrode assembly 100. Therefore, the number of filling areas 500 can be one, two, or three.

[0046] The number of liquid-passing channels 421 is at least one, and the number of liquid-passing channels 421 corresponds one-to-one with the number of filling areas 500 to match the printing and filling requirements of the electrode suspension areas of the cell module. In some examples, there is one liquid-passing channel 421. In other examples, there are two liquid-passing channels 421. In still other examples, there are three liquid-passing channels 421. According to the cell module design and process of the solid-state battery, a corresponding number of liquid-passing channels 421 are manufactured on the second positioning member 400, enabling the electrode printing fixture based on adhesive layer lamination to adapt to the printing and filling requirements of different electrode groups 100.

[0047] In this embodiment, the structure of the second positioning member 400 specifically includes a frame portion 410 and a printing liquid passage portion 420. The printing liquid passage portion 420 is generally in the shape of a sheet, and the printing liquid passage portion 420 is fixedly connected to the frame portion 410 so that the printing liquid passage portion 420 and the frame portion 410 can together form a printing groove 430. The printing liquid passage portion 420 is provided with a plurality of liquid passage channels 421.

[0048] It is understood that the frame portion 410 has a through hole running vertically, and the printing liquid portion 420 is located below the frame portion 410. Furthermore, the printing liquid portion 420 is fixedly connected to the frame portion 410 and covers the lower opening of the through hole, so that the through hole and the printing liquid portion 420 together form the printing groove 430. The frame portion 410 can be a solid structure or a hollow structure. The surface of the frame portion 410 away from the printing liquid portion 420 is a first surface 440, and the surface of the printing liquid portion 420 away from the frame portion 410 is a second surface 450, which can fit against the third surface 330 of the first positioning member 300.

[0049] In this embodiment, the frame portion 410 is square-shaped and made of a metal material such as steel. The upper surface of the frame portion 410 is the first surface 440. The printing liquid portion 420 is square-shaped, and the lower surface of the printing liquid portion 420 is the second surface 450.

[0050] The first positioning member 300 has a first state and a second state. When the first positioning member 300 is in the first state, the first positioning member 300 and the second surface 450 of the second positioning member 400 are fitted together so that the positioning groove 320 of the first positioning member 300 and the second surface 450 of the second positioning member 400 together define a positioning cavity for accommodating and positioning the electrode assembly 100. The positioning cavity can position the electrode assembly 100 in the vertical and horizontal directions. Moreover, a plurality of liquid passages 421 on the second positioning member 400 are all connected to the positioning cavity so that the liquid passages 421 can be aligned with the electrode suspension area of ​​the electrode assembly 100 located in the positioning cavity. This facilitates the flow of adhesive in the printing tank 430 through the liquid passages 421 to the electrode suspension area and effectively fills the filling area 500, so that the electrode suspension area of ​​the electrode assembly 100 can form a filling member 200 of a certain size.

[0051] When the first positioning member 300 is in the second state, the first positioning member 300 and the second positioning member 400 are separated, which facilitates the placement and removal of the electrode assembly 100 in the positioning groove 320 on the first positioning member 300.

[0052] like Figures 1 to 6As shown, in the use of the electrode printing fixture based on adhesive layer bonding provided in this embodiment of the present invention, when the first positioning member 300 and the second positioning member 400 are used together, the stacked electrode assembly 100 is first placed in the positioning groove 320 of the first positioning member 300, and then the third plane of the first positioning member 300 is attached to the second surface 450 of the second positioning member 400, so that the positioning groove 320 and the second surface 450 of the first positioning member 300 together form a positioning cavity. At this time, the upper surface of the electrode assembly 100 is attached to the second surface. The lower surface of the electrode assembly 100 is attached to the bottom surface of the positioning groove 320, and the outer peripheral surface of the electrode assembly 100 is attached to the peripheral wall surface of the positioning groove 320. This allows the electrode assembly 100 located in the positioning cavity to be positioned and fixed, maintaining a stable state during the printing process. At the same time, the electrode suspension area on the electrode assembly 100 is aligned with the liquid passage 421 on the second positioning member 400, and the liquid passage 421 is connected to the filling area 500 so that the adhesive can flow down to the filling area 500 through the liquid passage 421.

[0053] Then, adhesive is added to the printing groove 430 of the second positioning member 400, and the adhesive in the printing groove 430 is driven by printing to flow through the liquid passage 421 into the positioning cavity defined by the first positioning member 300 and the second positioning member 400, so that the adhesive can directly fill the electrode suspension area on the electrode assembly 100, thereby achieving efficient and accurate formation of the filler 200 in the electrode suspension area.

[0054] Since the filler 200 is formed by the solidification of adhesive, a layer of adhesive can be applied to the suspended area of ​​the electrode assembly 100 after the printing process. At this time, the first positioning member 300 and the second positioning member 400 are separated to facilitate the removal of the electrode assembly 100 with the filler 200 from the positioning groove 320 of the first positioning member 300. During the separation of the first positioning member 300 and the second positioning member 400, the first positioning member 300 can be driven to move horizontally relative to the second positioning member 400.

[0055] By using the aforementioned electrode printing fixture, filler 200 can be quickly and accurately manufactured for the electrode suspension area of ​​each electrode group 100, so that filler 200 is formed in the electrode suspension area of ​​each electrode group 100 of the cell module. The filler 200 can provide effective support for the electrode suspension area of ​​the electrode group 100, thereby preventing the cell module from collapsing during the pressure testing process, which could lead to a short circuit in the cell module.

[0056] In one specific embodiment, the printing liquid-passing section 420 is a metal plate, specifically, a steel plate. The metal plate can be fixedly connected to the frame section 410, such as by welding or bolting, so that the metal plate and the frame section 410 together form the printing tank 430. The metal plate has several through holes, and all the through holes penetrate both sides of the metal plate. Therefore, the through holes are liquid-passing channels 421, allowing the adhesive liquid in the printing tank 430 to flow to the outside of the printing tank 430.

[0057] Understandably, the printing liquid-coated part 420 is made of metal plate, which has high strength and rigidity. When the first positioning part 300 and the printing liquid-coated part 420 are bonded together in the printing process, the printing liquid-coated part 420 is not easily deformed, ensuring a good forming effect of the adhesive layer.

[0058] In another specific embodiment, the printing liquid-passing section 420 is a silk block, which has a liquid-passing area and a liquid-blocking area. The liquid-blocking area has a photosensitive adhesive layer, while the liquid-passing area does not have a photosensitive adhesive layer and is a liquid-passing channel 421. In this embodiment, the silk block is square-shaped, and the photosensitive adhesive layer is located on the side of the printing liquid-passing section 420 away from the printing tank 430, that is, on the lower surface of the silk block. This avoids the photosensitive adhesive layer from being damaged by the printing operation.

[0059] Understandably, a metal block can be mounted on the silk block, and the metal block is fixed to the frame portion 410 by means of bolts, welding, or other methods, so that the silk block and the frame portion 410 together form the printing groove 430. At this time, the silk block is in a taut and straight state, so that the lower surface of the silk block can fit against the third surface 330 of the first positioning member 300, ensuring a good forming effect of the adhesive layer. The adhesive in the printing groove 430 can pass through the fiber gaps of the silk block, allowing the adhesive to flow from inside the printing groove 430 to outside the printing groove 430.

[0060] Photosensitive adhesive is a functional material that undergoes chemical or physical changes under light conditions. Specifically, the photosensitive adhesive layer coated on the silk block forms a cross-linked structure after exposure and curing, which can act as a liquid barrier, thereby creating a liquid-blocking area on the silk block; while the area on the silk block without the photosensitive adhesive layer is a liquid-passing area, which allows the adhesive to pass through.

[0061] In some embodiments, the printed liquid-passing section 420 and the frame section 410 are detachably connected, for example, by bolt connection. Therefore, different printed liquid-passing sections 420 can be replaced according to different cell module design processes, ensuring that the number of liquid-passing channels 421 on the printed liquid-passing section 420 meets the adhesive layer printing and filling requirements on the electrode assembly 100.

[0062] In Example 1, as Figure 3As shown, two liquid-passing channels 421 are provided, and the two liquid-passing channels 421 are arranged in parallel, each of which is elongated. In this case, the negative electrode 110 and the positive electrode 120 on the electrode assembly 100 are centrally located, so that electrode suspension areas are formed on both sides of the electrode assembly 100. Then, when the electrode assembly 100 is placed in the positioning groove 320 of the first positioning member 300, two filling areas 500 can be formed. Then, the first positioning member 300 and the second positioning member 400 are fitted together, so that the two liquid-passing channels 421 are respectively arranged corresponding to the two filling areas 500, thereby enabling the filling member 200 to be formed in the two filling areas 500.

[0063] In Example 2, as Figure 7 As shown, there is one liquid passage 421, which is elongated. In this case, an electrode suspension area is formed on one side of the electrode assembly 100. When the first positioning member 300 and the second positioning member 400 are attached together, the electrode suspension area on the electrode assembly 100 located in the positioning groove 320 can be aligned with the liquid passage 421, so that a filler 200 can be formed in the electrode suspension area by the glue filling and curing method.

[0064] In Example 3, as Figure 8 As shown, there are two liquid channels 421, which are arranged perpendicularly to each other, forming a 90° angle and interconnecting each other. Thus, the two liquid channels 421 together form an L-shaped channel structure. In this configuration, electrode suspension areas are formed on both adjacent sides of the electrode assembly 100. After the first positioning member 300 and the second positioning member 400 are accurately fitted together, the electrode suspension areas of the electrode assembly 100 in the positioning groove 320 align with the liquid channels 421. Therefore, the adhesive in the printing tank 430 can flow through the liquid channels 421 to the electrode suspension areas, resulting in an adhesive layer covering the electrode suspension areas on the electrode assembly 100.

[0065] In Example 4, as Figure 9 As shown, there are three liquid passages 421, and one of the liquid passages 421 is perpendicularly connected to the other two liquid passages 421 respectively. That is, one liquid passage 421 forms a 90° angle with the other two liquid passages 421 and is interconnected, so that the three liquid passages 421 together form a U-shaped channel structure. In this case, electrode suspension areas are formed on three sides of the electrode assembly 100. Therefore, when the first positioning member 300 and the second positioning member 400 are used together, the three liquid passages 421 correspond to the three electrode suspension areas on the electrode assembly 100, and filler members 200 can be formed on the three electrode suspension areas on the electrode assembly 100 by adhesive printing.

[0066] In some embodiments, the first positioning member 300 is provided with a plurality of vacuum adsorption holes, and the plurality of vacuum adsorption holes are connected to the positioning groove 320 so that the electrode assembly 100 in the positioning groove 320 is adsorbed and fixed.

[0067] Understandably, the specific number of vacuum adsorption holes is selected based on actual needs and is not specifically limited here. Vacuum adsorption holes can be set only on the bottom surface of the positioning groove 320. The first positioning component 300 is also equipped with a vacuum chamber and a vacuum tube connection port. All vacuum adsorption holes are connected to the vacuum chamber, and the vacuum tube connection port is also connected to the vacuum chamber. The vacuum extraction pipe can be connected to the vacuum tube connection port. Therefore, during vacuuming, the negative pressure is used to apply vacuum adsorption to fix the electrode assembly 100 located in the positioning groove 320, ensuring that the electrode assembly 100 does not shift during the adhesive layer printing and filling process. This allows the filler 200 to be accurately formed in the electrode suspension area of ​​the electrode assembly 100.

[0068] Of course, based on the above structure, vacuum adsorption holes can also be provided on the side wall of the positioning groove 320.

[0069] In some embodiments, multiple first positioning members 300 are provided, and multiple sets of liquid channels 421 are provided for the second positioning members 400. All sets of liquid channels 421 are connected to the printing tank 430. Each set of liquid channels 421 corresponds to each first positioning member 300. In each set of liquid channels 421, the number of liquid channels 421 is consistent with the number of electrode suspension areas on each electrode group 100. Therefore, by using one second positioning member 400 in conjunction with multiple first positioning members 300, the filling material 200 can be formed in the electrode suspension areas of multiple electrode groups 100 simultaneously, thereby improving work efficiency.

[0070] It is understood that in the above embodiments, since the second surface 450 of the second positioning member 400 and the third surface 330 of the first positioning member 300 are both planar and can fit together, the electrode printing fixture based on adhesive layer lamination can perform adhesive layer lamination on the electrode suspension area of ​​the flat electrode assembly 100.

[0071] When using an electrode printing fixture based on adhesive layer bonding to bond adhesive layers in the suspended area of ​​the electrode assembly 100 of an irregularly shaped battery, the second surface 450 of the second positioning member 400 is set as a convex arc surface, and the third surface 330 of the first positioning member 300 is set as a concave arc surface, so that the second surface 450 can fit with the third surface 330. The bottom surface of the positioning groove 320 is also set as a concave arc surface to fit with the electrode assembly 100 of the curved battery. Alternatively, the bottom surface of the printing groove 430 can also be set as a concave arc surface to cooperate with the second surface 450, ensuring that the positions of the liquid passage 421 are consistent in vertical dimensions.

[0072] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0073] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A printing fixture for electrodes based on adhesive layer lamination, characterized in that, include: The first positioning element (300) has a positioning groove (320) for accommodating and positioning the electrode assembly (100). The second positioning member (400) is provided with a printing groove (430) and a plurality of liquid passages (421). The second positioning member (400) has a first surface (440) and a second surface (450) on opposite sides. The first surface (440) is recessed inward to form the printing groove (430). The plurality of liquid passages (421) are located at the bottom of the printing groove (430) and penetrate through the second surface (450). The first positioning member (300) has a first state and a second state. When the first positioning member (300) is in the first state, the first positioning member (300) is attached to the second surface (450) so that the positioning groove (320) and the second surface (450) together define a positioning cavity for accommodating and positioning the electrode assembly (100), and a plurality of liquid passages (421) are connected to the positioning cavity so that the liquid passages (421) can be aligned with the electrode suspension area of ​​the electrode assembly (100) in the positioning cavity; when the first positioning member (300) is in the second state, the first positioning member (300) and the second positioning member (400) are separated.

2. The electrode printing fixture based on adhesive layer lamination according to claim 1, characterized in that, The second positioning member (400) includes a frame portion (410) and a printing liquid passage portion (420). The printing liquid passage portion (420) is in the shape of a sheet and is connected to the frame portion (410) so that the printing liquid passage portion (420) and the frame portion (410) together form the printing groove (430). The printing liquid passage portion (420) is provided with a plurality of liquid passage channels (421).

3. The electrode printing fixture based on adhesive layer lamination according to claim 2, characterized in that, The printing liquid passage (420) is a metal plate, which has several through holes, which are the liquid passage channels (421) and penetrate both sides of the metal plate.

4. The electrode printing fixture based on adhesive layer lamination according to claim 2, characterized in that, The printing liquid-passing section (420) is a silk block, which has a liquid-passing area and a liquid-blocking area. The liquid-blocking area has a photosensitive adhesive layer, and the liquid-passing area is the liquid-passing channel (421).

5. The electrode printing fixture based on adhesive layer lamination according to claim 4, characterized in that, The photosensitive adhesive layer is located on the side surface of the printing liquid section (420) away from the printing tank (430).

6. The electrode printing fixture based on adhesive layer lamination according to any one of claims 2 to 5, characterized in that, The printing liquid section (420) is detachably connected to the frame section (410).

7. The electrode printing fixture based on adhesive layer lamination according to claim 6, characterized in that, There are two liquid passages (421), which are arranged in parallel or perpendicularly connected.

8. The electrode printing fixture based on adhesive layer lamination according to claim 6, characterized in that, The liquid passage (421) is provided in three parts, and one of the liquid passages (421) is perpendicularly connected to the other two liquid passages (421).

9. The electrode printing fixture based on adhesive layer lamination according to claim 1, characterized in that, The first positioning member (300) is provided with a plurality of vacuum adsorption holes, and the plurality of vacuum adsorption holes are connected to the positioning groove (320) so that the electrode assembly (100) in the positioning groove (320) is adsorbed and fixed.

10. The electrode printing fixture based on adhesive layer lamination according to claim 1, characterized in that, The first positioning member (300) is provided in multiple ways, and the second positioning member (400) is provided in multiple sets of liquid passages (421) that communicate with the printing tank (430). Each set of liquid passages (421) is provided corresponding to each of the first positioning members (300).

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