Semi-automatic lithium slurry button cell preparation device and use method thereof

Abstract

The invention discloses a semi-automatic lithium slurry button cell preparation device and a use method thereof, the semi-automatic lithium slurry button cell preparation device comprises a convex rail button cell accessory substrate, the convex rail button cell accessory substrate is provided with a positive and negative electrode lithium slurry four-side coating device, and the convex rail button cell accessory substrate is internally provided with a movable current collector carrying table. By adopting the device, the rapid preparation of the lithium slurry battery is realized. According to the invention, the problems of complex process, high solvent cost and toxic pollution in the traditional lithium ion battery coating process are avoided, and meanwhile, the problem that the lithium slurry battery is difficult to cut and assemble in the button cell preparation process due to the flowability of the slurry is solved. By adopting the semi-automatic preparation device for the lithium slurry button cell, the lithium slurry button cell with good uniformity can be efficiently prepared, so that the aim of quickly evaluating the slurry performance, the slurry stability, the pole piece suitability and the button cell performance of the lithium slurry cell is fulfilled.

Description

Technical Field

[0001] The present invention relates to the technical field of electrochemical energy storage, and in particular to a semi-automatic lithium slurry button battery preparation device and a use method thereof. Background Art

[0002] With the widespread application of new energy technologies, electrochemical energy storage technology currently has a very broad development prospect. Lithium slurry battery technology is an emerging technology and research direction in electrochemical energy storage technology.

[0003] Compared with traditional lithium-ion battery energy storage, lithium slurry battery energy storage has the characteristics of high specific energy, high safety, and low cost. Toxic organic solvents such as N, N-dimethylpyrrolidone (NMP) are required in the preparation process of traditional lithium-ion batteries, and electrolyte needs to be injected after the electrode is dried and formed. Lithium slurry batteries directly mix active electrode materials with electrolytes to form conductive slurry for energy storage.

[0004] However, there are difficulties in the preparation of existing lithium slurry button batteries, mainly because when the lithium slurry battery is coated on a large area on the current collector, it is difficult to use traditional lithium-ion battery cutting and punching equipment to cut it into small pieces of current collector complex due to the high viscosity of the slurry, easy adhesion, and easy deterioration. Therefore, it is difficult to form a button battery with a battery shell, diaphragm, lithium sheet, gasket, spring clip, etc. to achieve the purpose of quickly testing the electrochemical properties of the lithium slurry.

[0005] Based on the above-mentioned research and development background and technical difficulties, a fast and convenient lithium slurry button battery preparation device and use method are needed to achieve efficient research on the electrochemical properties of lithium slurry and lithium slurry button batteries. Summary of the invention

[0006] In view of the problem that the existing positive and negative lithium slurries have high viscosity, which makes it impossible to cut after coating or to use a four-sided coater to complete uniform coating on the already cut circular small current collector adapted for button batteries, and the problem that the coated pole piece cannot be directly clamped from both sides with tweezers due to the semi-solid viscous slurry on one side, the present invention proposes a semi-automatic lithium slurry button battery preparation device. Using this device, the difficulty of preparing lithium slurry button batteries can be significantly reduced, and the preparation efficiency of lithium slurry button batteries can be greatly improved. Using this device, multiple lithium slurry button battery pole pieces and battery shell combination semi-finished products can be prepared simultaneously in one operation.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A semi-automatic lithium slurry button battery preparation device comprises a convex track button battery accessory substrate, on which positive and negative lithium slurry four-sided coaters are arranged, and a movable current collector carrier is arranged inside the convex track button battery accessory substrate.

[0009] Furthermore, the convex track button battery accessory substrate includes an upper panel and a lower slot plate, the upper panel is provided with a circular through hole, the lower slot plate corresponding to the position of the circular through hole is provided with a circular groove, and the circular through hole and the circular groove correspond one to one, and a current collector carrier is movably arranged between the upper panel and the lower slot plate.

[0010] Furthermore, the convex track button-type battery accessory substrate is an integrated structure, and a current collector carrier accommodating cavity is provided between the upper panel where no circular through hole is provided and the corresponding lower slot plate.

[0011] Furthermore, the thickness of the upper panel is 0.1-0.5 cm, and the depth of the circular groove is 1.1-1.5 cm.

[0012] Furthermore, a convex rail is provided on the upper panel of the convex rail button battery accessory substrate, and a positive and negative electrode lithium slurry four-sided coater is installed on the convex rail.

[0013] Furthermore, a track groove is provided at the contact position between the upper panel and the convex rail, and the positive and negative electrode lithium slurry four-sided coater can slide in both directions on the convex rail.

[0014] Furthermore, the upper and lower surfaces of the current collector carrier are smooth and flat, and one side is connected with an arc-shaped handle, which can be pulled out to one side in one direction.

[0015] Furthermore, a lithium slurry collecting tank is provided on the upper panel near the arc handle of the current collector carrier. The method for using the semi-automatic lithium slurry button battery preparation device of the present invention comprises the following steps:

[0016] (1) First, the positive and negative electrode lithium slurry four-sided coater, the movable current collector carrier and the convex track button battery accessory substrate are assembled intact, and the positive and negative electrode lithium slurry four-sided coater is placed on the upper layer panel away from the lithium slurry collecting tank, that is, the end of the upper layer panel without a circular through hole;

[0017] (2) Pull open the movable current collector carrier, put the positive or negative battery shell into the circular groove of the lower slot plate, push the movable current collector carrier back into the current collector carrier accommodating cavity, and put the current collector disc into the circular through hole position of the upper panel. At this time, the current collector disc is located on the movable current collector carrier. Since the upper panel has a certain thickness, the current collector disc is confined in the circular slot formed by the circular through hole of the upper panel and the current collector carrier;

[0018] (3) Evenly apply the prepared positive or negative electrode slurry on the upper panel in the direction of movement of the four-sided coater, and steadily push the four-sided coater to evenly apply the positive or negative electrode slurry on the upper surface of the upper panel. Since the current collector disc is lower than the upper surface of the upper panel by a certain height, the current collector disc is fixed in the circular slot and will not move. The positive or negative electrode slurry will also be evenly applied to the current collector surface with a certain thickness;

[0019] (4) After all the current collector discs are coated, slowly pull open the movable current collector carrier to allow the current collector discs with slurry to fall into the corresponding positive electrode shell or negative electrode shell below in turn, so that a combination of lithium slurry current collector disc and positive electrode shell or lithium slurry current collector disc and negative electrode shell can be obtained for the subsequent assembly of button batteries.

[0020] Furthermore, in step (3), when the positive and negative electrode lithium slurry coaters on all four sides have finished coating all the circular current collectors, the excess lithium slurry is pushed into the lithium slurry collecting tank at the end of the coating direction, thereby avoiding waste of lithium slurry.

[0021] The semi-automatic lithium slurry button battery preparation device of the present invention can directly use a four-sided coater to scrape the slurry onto a small circular current collector placed in a circular slot, and the four-sided coater scrapes the remaining lithium slurry into a recovery tank at the bottom. Then, after the current collector carrier is pulled out, the coated current collector disc (pole piece) falls into the center of the corresponding button battery shell below.

[0022] Furthermore, the material of the four-sided coater for the positive and negative electrode lithium slurry is stainless steel, including but not limited to: 304 stainless steel, 316 stainless steel, 317 stainless steel and other high-hardness and corrosion-resistant stainless steel.

[0023] Furthermore, the button battery shell slot can hold a button positive battery shell and a button negative battery shell, and the button battery shell models include CR2016, CR2025, and CR2032.

[0024] The present invention provides the following description of the slurry of the lithium slurry button battery: the lithium slurry used in the lithium slurry button battery contains positive and negative electrode active materials, a conductive agent, and an electrolyte.

[0025] Furthermore, the positive electrode active material includes one of lithium cobalt oxide, ternary materials, lithium-rich manganese-based materials, spinel lithium manganese oxide, and lithium iron phosphate.

[0026] Furthermore, the negative electrode active material includes but is not limited to one of graphite material, amorphous carbon material, titanium oxide material, silicon-carbon composite material, silicon-oxygen composite material, and tin-based composite material.

[0027] Furthermore, the conductive agent is any one or a composite of conductive agents such as carbon black, Ketjen black, graphene, carbon nanotubes, carbon fibers and various metal conductive particles, and the composite methods include surface coating, mechanical mixing, etc.; wherein the mass ratio of the electrode active material to the conductive agent is (1-100):(0-99), specifically 80:5; the composite or mixing methods include surface coating, mechanical mixing, etc.

[0028] Furthermore, the lithium salt in the electrolyte is lithium hexafluorophosphate, lithium tetrafluoroborate, lithium bis(oxalatoborate), lithium bis(fluorooxalatoborate), lithium bis(trifluoromethylsulfonylimide), etc. The solvent in the electrolyte can be propylene carbonate, ethylene carbonate, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, etc.

[0029] Furthermore, the method for preparing the slurry of the lithium slurry button battery comprises the following steps:

[0030] (1) Premixing of powders. Premix the electrode active material and the conductive agent into dry powders, add the electrode active material and the conductive agent into a mixing tank, and premix them by any mixing method such as ball milling, double planetary stirring, deaerator, high-speed disperser or high-speed grinder. The premixing time is 10 to 30 minutes.

[0031] (2) Powder wetting. After the pre-mixing of the electrode active material and the conductive agent, a certain amount of electrolyte is added and mixed. The mixing method is any method such as ball milling, double planetary stirring, degassing machine, high-speed disperser or high-speed grinder to mix evenly. The wetting time is 10min to 30min.

[0032] (3) Preparation of finished slurry. Add a certain amount of electrolyte into a mixing tank, and add the fully wetted powder into the electrolyte tank in batches. The mixing method is any uniform mixing method such as ball milling, double planetary stirring, degassing machine, high-speed disperser or high-speed grinder, and the mixing time is 30 minutes to 60 minutes.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. The semi-automatic lithium slurry button battery preparation device and the use method thereof of the present invention can quickly prepare a combination of a lithium slurry current collector sheet and a button battery shell for subsequent assembly of the button battery, thereby simplifying the preparation process of the lithium slurry button battery and reducing the difficulty of coating, cutting and shelling the lithium slurry button battery.

[0035] 2. The semi-automatic lithium slurry button battery preparation device and the use method thereof of the present invention can save and utilize lithium slurry. A lithium slurry recovery tank is provided at the coating end, which reduces the waste of slurry in the lithium slurry button battery preparation process.

[0036] 3. The semi-automatic lithium slurry button battery preparation device of the present invention can achieve the purpose of preparing lithium slurry button battery collector discs of different thicknesses by adjusting the thickness of the upper panel, so as to achieve the purpose of quickly evaluating the performance of lithium slurry button batteries of different thicknesses. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 It is a top view structural schematic diagram of a semi-automatic lithium slurry button battery preparation device;

[0039] Figure 2 It is a schematic diagram of the main structure of a semi-automatic lithium slurry button battery preparation device;

[0040] 1 substrate, 1-1 upper panel, 1-2 lower slot plate, 1-11 circular through hole, 1-21 circular groove, 2 four-sided coater, 3 current collector carrier, 4 convex rail, 5 lithium slurry collecting tank, 6 arc handle.

[0041] Figure 3 This is the first cycle charge and discharge curve of the lithium iron phosphate slurry button battery prepared by using the semi-automatic lithium slurry button battery preparation device for current collector No. 1 in Example 2.

[0042] Figure 4 This is the first cycle charge and discharge curve of the lithium iron phosphate slurry button battery prepared by using the semi-automatic lithium slurry button battery preparation device for current collector No. 3 in Example 2.

[0043] Figure 5 This is the first cycle charge and discharge curve of the lithium iron phosphate slurry button battery prepared by using the semi-automatic lithium slurry button battery preparation device for current collector No. 5 in Example 2.

[0044] Figure 6 This is the first cycle charge and discharge curve of the lithium iron phosphate slurry button battery prepared by using the semi-automatic lithium slurry button battery preparation device for current collector No. 6 in Example 2.

[0045] Figure 7 State diagram of the slurry prepared for Examples 2-7. DETAILED DESCRIPTION

[0046] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or are obtained by practicing the present invention. It should be understood by those skilled in the art that the specific embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0047] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0048] Example 1

[0049] like Figure 1 and Figure 2 As shown, a semi-automatic lithium slurry button battery preparation device includes a convex track button battery accessory substrate 1, on which a positive and negative electrode lithium slurry four-sided coater 2 is provided, and a movable current collector carrier 3 is provided inside the convex track button battery accessory substrate 1.

[0050] Preferably, the convex track button battery accessory substrate 1 includes an upper panel 1-1 and a lower slot plate 1-2, the thickness of the upper panel is 0.1-0.5 cm, a circular through hole 1-11 is provided on the upper panel 1-1, and a circular groove 1-21 is provided on the lower slot plate 1-2 corresponding to the position of the circular through hole, the depth of the circular groove is 1.1-1.5 cm, the diameter of the circular groove 1-21 is slightly larger than the diameter of the circular groove 1-21, and the circular through hole corresponds to the circular groove one by one, and a current collector carrier is movably arranged between the upper panel 1-1 and the lower slot plate 1-2.

[0051] Preferably, the convex track button battery accessory substrate and the movable current collector carrier are made of corrosion-resistant, acid-resistant, alkali-resistant, smooth-surfaced, and non-deformable plastic parts, including but not limited to various types of easily processed corrosion-resistant plastics such as polytetrafluoroethylene, polyvinylidene fluoride, polypropylene, and ABS engineering plastics. The molding and processing methods of these plastic parts include but are not limited to compression molding, thermoforming, 3D printing molding, cutting molding, etc.

[0052] Preferably, the lower groove plate of the convex track button battery accessory is designed with a circular groove of a certain depth as a button battery shell placement area. In the coated state, there is a movable collector carrier above the button battery shell placement area. The collector disc is placed at the circular through hole of the upper panel. At this time, the collector disc is actually located on the collector carrier, and the highest point of the collector disc is still 50 μm lower than the coating plane (the upper surface of the upper panel) to fix the collector disc.

[0053] Specifically, the convex track button battery accessory substrate is an integrated structure, and the left end surface is provided with an insertion port for the current collector carrier. The movable current collector carrier can be installed and inserted between the upper panel 1-1 and the lower slot plate 1-2 of the convex track button battery accessory substrate, and serves as a middle partition to divide the entire device into an upper coating area and a lower button battery shell area. The right end surface of the convex track button battery accessory substrate is a closed structure design, and a current collector carrier accommodating cavity is provided between the upper panel 1-1 where no circular through hole is provided and the corresponding lower slot plate 1-2.

[0054] Preferably, a convex rail 4 is provided on the upper panel of the convex track button battery accessory substrate, and a positive and negative electrode lithium slurry four-sided coater 2 is installed on the convex rail. A track groove is provided at the contact position between the upper panel and the convex rail, and the positive and negative electrode lithium slurry four-sided coater 2 can slide bidirectionally on the convex rail. Specifically, the groove positive and negative electrode lithium slurry four-sided coater needs to ensure that the four contact surfaces with the slurry are smooth and flat, and are made of corrosion-resistant, high-strength stainless steel. The stainless steel materials for preparing parts include but are not limited to: high-hardness and corrosion-resistant stainless steels such as 304 stainless steel, 316 stainless steel, and 317 stainless steel. After the part is combined with the double-layer card slot of the convex track button battery accessory, it can slide smoothly on the convex track.

[0055] Preferably, the upper and lower surfaces of the current collector carrier are smooth and flat, and one side is connected to an arc-shaped handle 6, which can be pulled out unidirectionally to one side. The upper panel is close to the side of the arc-shaped handle of the current collector carrier and is provided with a lithium slurry collecting groove 5 for collecting excess slurry. The collecting groove 5 is a long strip groove and is arranged parallel to the four-sided coater in the scraping movement direction of the four-sided coater.

[0056] The method for using the semi-automatic lithium slurry button battery preparation device of the present invention comprises the following steps:

[0057] (1) First, the positive and negative electrode lithium slurry four-sided coater, the movable current collector carrier and the convex track button battery accessory substrate are assembled intact, and the positive and negative electrode lithium slurry four-sided coater is placed on the upper layer panel away from the lithium slurry collecting tank, that is, the end of the upper layer panel without a circular through hole;

[0058] (2) Pull open the movable current collector carrier, put the positive or negative battery shell into the circular groove of the lower slot plate, push the movable current collector carrier back into the current collector carrier accommodating cavity, and put the current collector disc into the circular through hole position of the upper panel. At this time, the current collector disc is located on the movable current collector carrier. Since the upper panel has a certain thickness, the current collector disc is confined in the circular slot formed by the circular through hole of the upper panel and the current collector carrier;

[0059] (3) Evenly apply the prepared positive or negative electrode slurry on the upper panel in the direction of movement of the four-sided coater (i.e., the right side of the upper panel where no circular through hole is provided), and push the four-sided coater steadily to evenly apply the positive or negative electrode slurry on the upper surface of the upper panel. Since the current collector disc is lower than the upper surface of the upper panel by a certain height, the current collector disc is fixed in the circular slot and will not move, and the positive or negative electrode slurry will also be evenly applied to the surface of the current collector with a certain thickness. When the positive and negative electrode lithium slurry four-sided coater has completed coating all the circular current collectors, the excess lithium slurry is pushed into the lithium slurry collection tank at the end of the coating direction to avoid waste of lithium slurry.

[0060] (4) After all the current collector discs are coated, slowly pull open the movable current collector carrier to allow the current collector discs with slurry to fall into the corresponding positive electrode shell or negative electrode shell below in turn, so that a combination of lithium slurry current collector disc and positive electrode shell or lithium slurry current collector disc and negative electrode shell can be obtained, which can be picked up with tweezers for the subsequent assembly of button batteries.

[0061] Example 2

[0062] The positive electrode lithium slurry of this embodiment is composed of the following components in mass ratio: positive electrode active material and conductive agent, the type and ratio of which are: lithium iron phosphate material (LFP): carbon nanotube (CNT) = 95:5 (mass ratio), and the total mass is controlled to be 200g. The single-walled carbon nanotube (SWCNT) content in the carbon nanotube is about 93%, and the metal impurity content is less than 1%.

[0063] The material mixing and pulping method is as follows:

[0064] (1) Powder premixing: Lithium iron phosphate material and carbon nanotubes are premixed in dry powder, and the electrode active material and the conductive agent are added into the tank of the planetary degassing machine. The dry mixing speed of the planetary degassing machine is set to 500 r / min, the rotation ratio is set to 80%, and the premixing time is 20 min.

[0065] (2) Powder wetting: After the pre-mixed lithium iron phosphate and carbon nanotubes are mixed and wetted, the planetary degassing machine is set to have an orbital speed of 1000 r / min, a rotation ratio of 80%, and a mixing time of 30 min.

[0066] (3) Preparation of finished slurry. The electrolyte was added into the mixing tank three times, and the total solid content of the slurry was finally adjusted to 50%. The mixing speed was set to 1000 r / min, the rotation ratio was set to 100%, and the single mixing time was 30 min.

[0067] First, use the electrolyte as a solvent to evenly disperse the positive or negative electrode material in the slurry, and add a conductive agent to improve its performance. At a certain temperature, make the slurry flowable for easy processing. Then use a semi-automatic lithium slurry button battery preparation device to prepare the circular electrode sheet of the lithium slurry button battery. Finally, assemble the circular electrode sheet, diaphragm and counter electrode with accessories such as the battery shell, and seal it on the button battery sealing machine mold to obtain a lithium slurry button battery. Specifically, the semi-automatic lithium slurry button battery preparation device and use method in Example 1 are used to obtain a combination of a positive lithium slurry current collector disc and a positive electrode shell, which are clamped out with tweezers and assembled into a button battery. The first cycle charge and discharge curve of the battery is as shown below: Figure 3-6 shown.

[0068] Table 1 shows the coating quality of the current collector in this embodiment (the current collector number represents the number of current collector discs coated at one time).

[0069] Table 1 Current collector coating quality

[0070]

[0071] In summary, after using the lithium slurry preparation method of the present invention, it can be clearly seen that the slurry is evenly dispersed after mixing and has a good flow state (such as Figure 7 The lithium iron phosphate button battery prepared by the semi-automatic lithium slurry button battery preparation device has good charge and discharge performance, and the actual capacity is close to the theoretical calculated capacity of the current collector sheet. Figure 3 It can be seen that the first efficiency reaches 86.92%, indicating that the device can be used for the rapid preparation of lithium slurry button batteries and the evaluation of slurry performance.

[0072] Example 3

[0073] Example 3 uses negative electrode lithium slurry, which is different from Example 2 in that negative electrode active material and conductive agent are used, and their types and proportions are: lithium titanate (LTO): carbon nanotube (CNT) = 95:5 (mass ratio).

[0074] The semi-automatic lithium slurry button battery preparation device and use method in Example 1 are used to obtain a combination of a negative electrode lithium slurry current collector disc and a negative electrode shell, which are clamped out with tweezers and assembled into a button battery.

[0075] Example 4

[0076] The difference between Example 4 and Example 3 is that in the preparation of the finished slurry in step (3), the electrolyte is added to the wetted powder at one time, and the total solid content of the slurry is adjusted to 50%.

[0077] The semi-automatic lithium slurry button battery preparation device and use method in Example 1 are used to obtain a combination of a negative electrode lithium slurry current collector disc and a negative electrode shell, which are clamped out with tweezers and assembled into a button battery.

[0078] Example 5

[0079] The difference between Example 5 and Example 2 is that the type of conductive agent is changed from carbon nanotube (CNT) to Ketjen black (KB).

[0080] The semi-automatic lithium slurry button battery preparation device and use method in Example 1 are used to obtain a combination of a positive electrode lithium slurry current collector disc and a positive electrode shell, which are clamped out with tweezers and assembled into a button battery.

[0081] Example 6

[0082] The difference between Example 6 and Example 4 is that the type of conductive agent is changed from carbon nanotube (CNT) to conductive carbon black (SuperP).

[0083] The semi-automatic lithium slurry button battery preparation device and use method in Example 1 are used to obtain a combination of a negative electrode lithium slurry current collector disc and a negative electrode shell, which are clamped out with tweezers and assembled into a button battery.

[0084] Example 7

[0085] The difference between Example 7 and Example 4 is that in step (1), the powders are pre-mixed, the planetary degassing machine dry mixing revolution speed is set to 300 r / min, the rotation ratio is set to 100%, and the mixing time is 30 min.

[0086] The semi-automatic lithium slurry button battery preparation device and use method in Example 1 are used to obtain a combination of a negative electrode lithium slurry current collector disc and a negative electrode shell, which are clamped out with tweezers and assembled into a button battery.

[0087] By adopting the device and the method for preparing lithium slurry button batteries, lithium slurry button batteries with good uniformity can be efficiently prepared, thereby achieving the purpose of quickly evaluating the slurry performance, slurry stability, electrode adaptability and button battery performance of the lithium slurry battery.

[0088] The above embodiments of the present invention are for inspiration. Through the above description, relevant technicians can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A semi-automatic lithium slurry button battery preparation device, characterized in that: It comprises a convex track button type battery accessory substrate, on which positive and negative electrode lithium slurry four-sided coaters are arranged, and a movable current collector carrier is arranged inside the convex track button type battery accessory substrate.

2. The semi-automatic lithium slurry button battery preparation device according to claim 1, characterized in that: The convex track button battery accessory substrate includes an upper panel and a lower slot plate, the upper panel is provided with a circular through hole, the lower slot plate corresponding to the position of the circular through hole is provided with a circular groove, and the circular through hole and the circular groove correspond one to one, and a current collector carrier is movably arranged between the upper panel and the lower slot plate.

3. The semi-automatic lithium slurry button battery preparation device according to claim 2, characterized in that: The convex track button battery accessory substrate is an integrated structure, and a current collector carrier accommodating cavity is provided between the upper panel where no circular through hole is provided and the corresponding lower slot plate.

4. The semi-automatic lithium slurry button battery preparation device according to claim 1, characterized in that: The thickness of the upper panel is 0.1-0.5 cm, and the depth of the circular groove is 1.1-1.5 cm.

5. The semi-automatic lithium slurry button battery preparation device according to claim 1, characterized in that: The upper layer panel of the convex track button battery accessory substrate is provided with a convex track, and the convex track is equipped with a positive and negative electrode lithium slurry four-sided coater.

6. The semi-automatic lithium slurry button battery preparation device according to claim 5, characterized in that: A track groove is provided at the contact position between the upper panel and the convex track, and the four-sided coater of the positive and negative electrode lithium slurry can slide in both directions on the convex track.

7. The semi-automatic lithium slurry button battery preparation device according to any one of claims 1 to 6, characterized in that: The upper and lower surfaces of the current collector carrier are smooth and flat, and one side is connected with an arc-shaped handle, which can be pulled out to one side in one direction.

8. The semi-automatic lithium slurry button battery preparation device according to claim 7, characterized in that: The upper panel is provided with a lithium slurry collecting tank on one side close to the arc-shaped handle of the current collector carrier.

9. The method for using the semi-automatic lithium slurry button battery preparation device according to claim 8, characterized in that The following steps are involved: (1) First, assemble the positive and negative electrode lithium slurry four-sided coater, the movable current collector carrier and the convex track button battery accessory substrate, and place the positive and negative electrode lithium slurry four-sided coater on the upper layer panel away from the lithium slurry collecting tank, that is, the end of the upper layer panel without a circular through hole; (2) Pull open the movable current collector carrier, put the positive or negative battery shell into the circular groove of the lower slot plate, push the movable current collector carrier back into the current collector carrier accommodating cavity, and put the current collector disc into the circular through hole position of the upper panel. At this time, the current collector disc is located on the movable current collector carrier. Since the upper panel has a certain thickness, the current collector disc is confined in the circular slot formed by the circular through hole of the upper panel and the current collector carrier; (3) Evenly apply the prepared positive or negative electrode slurry on the upper panel in the direction of movement of the four-sided coater, and steadily push the four-sided coater to evenly apply the positive or negative electrode slurry on the upper surface of the upper panel. Since the current collector disc is lower than the upper surface of the upper panel by a certain height, the current collector disc is fixed in the circular slot and will not move. The positive or negative electrode slurry will also be evenly applied to the current collector surface with a certain thickness; (4) After all the current collector discs are coated, slowly pull open the movable current collector carrier so that the current collector discs with slurry fall into the corresponding positive electrode shell or negative electrode shell below in turn, and a combination of lithium slurry current collector disc and positive electrode shell or lithium slurry current collector disc and negative electrode shell is obtained, which is used for the subsequent assembly of button batteries.

10. The method for using the semi-automatic lithium slurry button battery preparation device according to claim 9, characterized in that: In step (3), when the positive and negative electrode lithium slurry coaters on all four sides have finished coating all the circular current collectors, the excess lithium slurry is pushed into the lithium slurry collecting tank at the end of the coating direction, thereby avoiding waste of lithium slurry.

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