A production device for electrode plates in batteries

Abstract

The present application discloses a production device for electrode plates in batteries. The invention belongs to the field of battery production technology. The device and method adopt a new solid-phase mixing method without solvent, which can reduce costs, is environmentally friendly, and has a simple structure and is easy to use. The device includes: a fan, a first mixing tank, a second mixing tank and a plurality of conduits; it also includes a fiberization tank, a storage bin, a collection tank and a plate maker. The method includes: equipment installation stage, feeding, first mixing, second mixing, mixed material fiberization, discharging, plate making and winding, etc.

Description

Technical Field

[0001] The invention relates to the technical field of battery production, and in particular to a production device for an electrode sheet in a battery. Background Art

[0002] At present, the production of positive electrode plates for lithium-ion batteries requires first slurrying the positive electrode material, additives, and NMP, then coating them on the current collector, and then drying them; the equipment used in the slurrying process is generally a planetary mixer or an automatic mixer, which is mainly suitable for liquid phase mixing.

[0003] The existing solution uses NMP as a solvent to prepare the positive electrode slurry of lithium-ion batteries, and then bakes it to volatilize the NMP to achieve the purpose of drying the electrode. First, NMP accounts for 5-15% of the cost in battery manufacturing; at the same time, it is biologically toxic and requires environmental protection treatment; and it needs to be baked, which has high energy consumption costs and low production efficiency. Summary of the invention

[0004] The present invention aims to solve the shortcomings of the prior art, namely, high production cost and poor environmental protection effect, and provide a new solid-phase mixing method without solvent, which can reduce costs, is environmentally friendly, and has a simple structure and is easy to use to produce electrode plates in batteries.

[0005] The above technical problems are solved by the following technical solutions:

[0006] A production device for an electrode sheet in a battery, the device comprising:

[0007] A fan, a first mixing tank, a second mixing tank and a plurality of conduits; the bottom end of the first mixing tank is mounted on the top end of the second mixing tank, the middle part of the first mixing tank is connected to and mounted on the top end of the second mixing tank through a plurality of groups of first conduits; the top end of the first mixing tank is connected to and mounted on the bottom end of the second mixing tank through a second conduit;

[0008] A fiberizing tank, a storage bin, a collection tank and an electrode maker; the bottom end of the second mixing tank is installed on the top end of the fiberizing tank, the storage bin is arranged on one side of the fiberizing tank, the upper end of the fiberizing tank is connected and installed on the upper end of the storage bin through a third conduit, the upper end of the storage bin is connected and installed on the lower end of the fiberizing tank through a fourth conduit, the fiberizing tank and the bottom end of the storage bin are both connected to the upper end of the collection tank through a fifth conduit, and the lower end of the collection tank is connected to the electrode maker through a sixth conduit;

[0009] The first conduit is provided with a feeding funnel for feeding, and the first conduit and / or the fourth conduit is provided with a fan for promoting gas flow.

[0010] As a further solution of the present invention: a cooler for cooling and a drying box for drying are provided on the second conduit and / or the fourth conduit.

[0011] As a further solution of the present invention: the first conduit is connected to a first mixer for mixing installed on a port of the first mixing tank; the first mixer includes a feed port and a discharge port, and a spiral pipe for mixing is provided between the feed port and the discharge port.

[0012] As a further solution of the present invention: the second conduit is connected to a second mixer for mixing provided on a port installed on the second mixing tank; the second mixer includes an air inlet and a plurality of air outlets, and the air inlet and the plurality of air outlets are connected to each other.

[0013] As a further solution of the present invention: the first conduit, the second conduit and the fourth conduit are all provided with a plurality of valves for assisting or controlling the flow of air.

[0014] As a further solution of the present invention: the upper end of the first mixing tank, one end of the first conduit connected to and installed in the second mixing tank, and the upper end of the storage bin are all provided with a dust collector for filtering or dust prevention; the dust collector includes an annular bracket and a filter cloth, and the filter cloth is covered on the annular bracket.

[0015] As a further solution of the present invention: the fiberizing tank and the storage bin are provided with polarizers for preventing the tank wall from sticking.

[0016] As a further solution of the present invention: a fiberizing device is provided in the fiberizing tank, and a plurality of filament meshes for fiberization are provided in the fiberizing device.

[0017] As a further solution of the present invention: the electrode sheet maker includes a hopper, and the upper, middle and lower ends of the hopper are respectively provided with a first roller, a roller group and a second roller, the roller group is two rollers arranged opposite to each other and rotating in opposite directions, and a current collector for making electrode sheets is provided between the first roller and the second roller and / or the roller group.

[0018] The present invention can achieve the following effects:

[0019] The present invention provides a production device for an electrode plate in a battery. Compared with the prior art, the present invention has the beneficial effects of providing a new solid-phase mixing method without solvent, which can reduce costs, is environmentally friendly, has a simple structure, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the production equipment in an embodiment of the present invention;

[0021] Figure 2 is a structural schematic diagram of a first mixer in an embodiment of the present invention;

[0022] Figure 3 is a structural schematic diagram of a second mixer in an embodiment of the present invention;

[0023] Figure 4 is a schematic diagram of the structure of a dust preventer in an embodiment of the present invention;

[0024] Figure 5 is a structural schematic diagram of a fiberizing device in an embodiment of the present invention;

[0025] Figure 6 This is a structural principle diagram of a pole piece maker in an embodiment of the present invention;

[0026] Figure 7 It is a schematic diagram of a planar structure of a pole piece maker in an embodiment of the present invention.

[0027] The reference numerals in the figure are: feed hopper 1, first mixing tank 2, second mixing tank 3, fiberizing tank 4, storage bin 5, fiberizing device 51, filament mesh 511, cooler 6, drying box 7, collecting tank 8, pole piece maker 9, fan 10, polarizer 11, dust collector 12, first balancing valve 101, second balancing valve 102, feed valve 201, first pressure relief valve 301, second pressure relief valve 302, third pressure relief valve 303, fourth pressure relief valve 304, first discharge valve 401 , second discharge valve 402, third discharge valve 403, fourth discharge valve 404, first mixer 501, second mixer 502, first conduit 601, second conduit 602, third conduit 603, fourth conduit 604, fifth conduit 605, sixth conduit 606, feed inlet 5011, discharge port 5012, spiral pipe 5013, annular bracket 121, filter cloth 122, collector 90, first roller 91, roller group 92, second roller 93, hopper 94. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment, a production device for an electrode sheet in a battery, see Figure 1 As shown, the device includes:

[0030] The fan 10, the first mixing tank 2, the second mixing tank 3 and a plurality of conduits; the bottom end of the first mixing tank 2 is mounted on the top end of the second mixing tank 3, the middle part of the first mixing tank 2 is connected to and mounted on the top end of the second mixing tank 3 through a plurality of groups of first conduits 601; the top end of the first mixing tank 2 is connected to and mounted on the bottom end of the second mixing tank 3 through a second conduit 602;

[0031] A fiberizing tank 4, a storage bin 5, an aggregate tank 8 and an electrode maker 9; the bottom end of the second mixing tank 3 is installed at the top of the fiberizing tank 4, the storage bin 5 is arranged on one side of the fiberizing tank 4, the upper end of the fiberizing tank 4 is connected and installed at the upper end of the storage bin 5 through a third conduit 603, the upper end of the storage bin 5 is connected and installed at the lower end of the fiberizing tank 4 through a fourth conduit 604, the fiberizing tank 4 and the bottom ends of the storage bin 5 are both connected to the upper end of the aggregate tank 8 through a fifth conduit 605, and the lower end of the aggregate tank 8 is connected to the electrode maker 9 through a sixth conduit 606;

[0032] The first conduit 601 is provided with a feeding funnel 1 for feeding, and the first conduit 601 and / or the fourth conduit 604 are provided with a fan 10 for promoting gas flow.

[0033] The second conduit and / or the fourth conduit is provided with a cooler 6 for cooling and a drying box 7 for drying.

[0034] See also Figure 1 and Figure 2 As shown, the first conduit 601 is connected to the first mixing tank 2 and is provided with a first mixer 501 for mixing; the first mixer 501 includes a feed port 5011 and a discharge port 5012, and a spiral pipe 5013 for mixing is provided between the feed port 5011 and the discharge port 5012.

[0035] See also Figure 1 and Figure 3 As shown, the second conduit 602 is connected to a second mixer 502 for mixing installed on a port of the second mixing tank 3; the second mixer 502 includes an air inlet and a plurality of air outlets, and the air inlet and the plurality of air outlets are connected.

[0036] See also Figure 1 As shown, the fiberizing tank 4 and the storage bin 5 are provided with polarizers 11 for preventing the tank walls from sticking.

[0037] The first conduit 601, the second conduit 602 and the fourth conduit 604 are all provided with a number of valves for assisting or controlling the flow of air. These valves include: a first pressure relief valve 301 and a second pressure relief valve 302 are respectively provided on both sides of the fan 10 of the first conduit 601, and a feed valve 201 is provided between the first conduit 601 and the feed hopper 1; a first balancing valve 101 is provided on the second conduit 602; a third pressure relief valve 303 and a fourth pressure relief valve 304 are respectively provided on both sides of the fan 10 of the fourth conduit 604, and a second balancing valve 102 is provided on the fourth conduit 604 near the fiberizing tank 4; a first discharge valve 401 is provided at the connection between the first mixing tank 2 and the second mixing tank 3; a second discharge valve 402 is provided at the connection between the second mixing tank 3 and the fiberizing tank 4; a third discharge valve 403 and a fourth discharge valve 404 are respectively provided at the connection between the fiberizing tank 4 and the fifth conduit 605 and at the connection between the storage bin 5 and the fifth conduit 605.

[0038] See also Figure 1 and Figure 4 As shown, the upper end of the first mixing tank 2, one end of the first conduit 601 connected and installed in communication with the second mixing tank 3, and the upper end of the storage bin 5 are all provided with a dust collector 12 for filtering or dust prevention; the dust collector 12 includes an annular bracket 121 and a filter cloth 122, and the filter cloth 122 is covered on the annular bracket 121.

[0039] See also Figure 1 and Figure 5 As shown, the fiberizing tank 4 is provided with a fiberizing device 51 , and the fiberizing device 51 is provided with a plurality of filament meshes 511 for fiberization.

[0040] See also Figure 1 , Figure 6 and Figure 7 As shown, the electrode sheet maker 9 includes a hopper 94, and the upper end, middle end and lower end of the hopper 94 are respectively provided with a first roller 91, a roller group 92 and a second roller 93, the roller group 92 is two rollers arranged opposite to each other and rotating in opposite directions, and a current collector 90 for making electrode sheets is provided between the first roller 91 and the second roller 93 and / or the roller group 92.

[0041] In this embodiment, the number of the first conduits 601 is two groups.

[0042] See also Figure 1As shown, the embodiment of the present invention adopts two sets of first conduits 601, starts the first mixing tank and the second mixing tank, closes the first pressure relief valve 301 and the second pressure relief valve 302, closes the first discharge valve 401 and the second discharge valve 402, opens the first balancing valve 101, starts the fan 10 on the second conduit 602 to form internal circulating wind in the mixing part, starts the cooler 6 and the drying box 7 on the second conduit 602, and the fan 10 generates airflow to bring the material in the feeding funnel 1 into the pipeline of the first conduit 601, and enters the first mixing tank 2 after being mixed by the first mixer 501, wherein the first mixer adopts a double spiral pipeline, and the material follows the airflow for spiral mixing; closes the feed valve, opens the first pressure relief valve 301, the second pressure relief valve 302 and the first discharge valve 401, and after the material enters the second mixing tank 3, closes the first pressure relief valve 301, opens the feed valve 201, and utilizes the porous air outlet of the second mixer 502 to discharge the material. The second mixing is carried out in the following manner; the third pressure relief valve 303, the fourth pressure relief valve 304, the third discharge valve 403 and the fourth discharge valve 404 are closed, the second balancing valve 102 is opened, the fan 10 on the fourth conduit 604 is started to form an internal circulating wind in the fiberizing part, and the cooler 6 and the drying box 7 on the fourth conduit 604 are started, at this time, in order to send the material after the secondary mixing into the fiberizing tank 4; the feed valve 201 is closed, the first pressure relief valve 301, the second pressure relief valve 302, the third pressure relief valve 303, the fourth pressure relief valve 304 and the second discharge valve 402 are opened, and after the material in the second mixing tank 3 enters the fiberizing tank 4, the second discharge valve 402 is closed, and the mixed material follows the airflow to collide with the filament mesh 511 of the fiberizing device 51 to form a wire drawing effect; the mixed material after wire drawing is sent to the pole piece maker 9, and the material is rolled onto the collector 90 by the rolling action of the roller to make the pole piece; and then rolled up. This completes the production of the electrode plates in the battery.

[0043] The present invention provides a production device for an electrode plate in a battery, which adopts a novel solid-phase mixing method without solvent, can reduce costs, is environmentally friendly, has a simple structure, is easy to use, and has high reliability.

[0044] The above description is only a preferred embodiment of the present invention, and does not limit the scope of patent protection of the present invention. Any equivalent structural transformation made by using the contents of the present invention and the drawings, directly or indirectly applied in other related technical fields, is also included in the protection scope of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description, and it is intended to include all changes that fall within the meaning and scope of the equivalent elements of the claims in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0045] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A production device for electrode sheets in batteries, characterized in that: The device comprises: A fan, a first mixing tank, a second mixing tank and a plurality of conduits; the bottom end of the first mixing tank is mounted on the top end of the second mixing tank, the middle part of the first mixing tank is connected to and mounted on the top end of the second mixing tank through a plurality of groups of first conduits; the top end of the first mixing tank is connected to and mounted on the bottom end of the second mixing tank through a second conduit; A fiberizing tank, a storage bin, a collection tank and an electrode maker; the bottom end of the second mixing tank is installed on the top end of the fiberizing tank, the storage bin is arranged on one side of the fiberizing tank, the upper end of the fiberizing tank is connected and installed on the upper end of the storage bin through a third conduit, the upper end of the storage bin is connected and installed on the lower end of the fiberizing tank through a fourth conduit, the fiberizing tank and the bottom end of the storage bin are both connected to the upper end of the collection tank through a fifth conduit, and the lower end of the collection tank is connected to the electrode maker through a sixth conduit; The first conduit is provided with a feeding funnel for feeding, and the first conduit and / or the fourth conduit is provided with a fan for promoting gas flow.

2. The production equipment of the electrode sheet in the battery according to claim 1, characterized in that: The second conduit and / or the fourth conduit is provided with a cooler for cooling and a drying box for drying.

3. The production equipment of the electrode sheet in the battery according to claim 1 or 2, characterized in that: The first conduit is connected to a first mixing tank and is provided with a first mixer for mixing; the first mixer includes a feed port and a discharge port, and a spiral pipe for mixing is provided between the feed port and the discharge port.

4. The production equipment of the electrode sheet in the battery according to claim 1 or 2, characterized in that: The second conduit is connected to a port installed on the second mixing tank, and a second mixer for mixing is provided; the second mixer includes an air inlet and a plurality of air outlets, and the air inlet and the plurality of air outlets are connected to each other.

5. The production equipment for the electrode sheet in a battery according to claim 1, characterized in that: The first conduit, the second conduit and the fourth conduit are all provided with a plurality of valves for assisting or controlling the flow of air.

6. The production equipment for the electrode sheet in a battery according to claim 1, characterized in that: The upper end of the first mixing tank, one end of the first conduit connected to and installed in the second mixing tank, and the upper end of the storage bin are all provided with dust collectors for filtering or dust prevention; the dust collector includes an annular bracket and a filter cloth, and the filter cloth is covered on the annular bracket.

7. The production equipment for the electrode sheet in a battery according to claim 1, characterized in that: The fiberizing tank and the material storage bin are provided with polarizers for preventing the material from sticking to the tank wall.

8. The production equipment for the electrode sheet in a battery according to claim 1, characterized in that: The fiberizing tank is provided with a fiberizing device, and the fiberizing device is provided with a plurality of filament meshes for fiberizing.

9. The production equipment for the electrode sheet in a battery according to claim 1, characterized in that: The electrode sheet maker includes a hopper, and a first roller, a roller group and a second roller are respectively provided at the upper end, the middle end and the lower end of the hopper. The roller group is two rollers arranged opposite to each other and rotating in opposite directions. A current collector for making electrode sheets is provided between the first roller and the second roller and / or the roller group.

10. The production equipment for the electrode sheet in a battery according to claim 1, characterized in that: A first pressure relief valve and a second pressure relief valve are respectively arranged at both ends of the fan of the first duct, and a feed valve is arranged between the first duct and the feed hopper; a first balancing valve is arranged on the second duct; a third pressure relief valve and a fourth pressure relief valve are respectively arranged on both sides of the fan of the fourth duct, and a second balancing valve is arranged on the fourth duct close to the fiberizing tank; a first unloading valve is arranged at the connection between the first mixing tank and the second mixing tank; a second unloading valve is arranged at the connection between the second mixing tank and the fiberizing tank; a third unloading valve and a fourth unloading valve are respectively arranged at the connection between the fiberizing tank and the fifth duct and at the connection between the storage bin and the fifth duct.

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