Waste pole piece positive electrode material recovery device

Abstract

The utility model discloses a waste pole piece positive electrode material recovery device which comprises a reaction tank, a vibration assembly, a condensation assembly and a degumming assembly. A filter plate, an elastic assembly and a first heating assembly are arranged in the reaction tank, the filter plate divides an inner cavity of the reaction tank into a reaction area and a post-filtration area, the elastic assembly supports the filter plate, the reaction tank is provided with a feeding pipe to be communicated with the reaction area, the reaction tank is provided with an air outlet pipe to be communicated with the reaction area, the reaction tank is provided with a discharging pipe to be communicated with the post-filtration area, and the reaction tank is provided with an air inlet pipe; the gas inlet pipe is used for providing reaction gas to the reaction zone. The vibration assembly is used for vibrating the filter plate. And the condensation assembly is used for condensing the gas from the reaction area. And the degumming assembly is used for degumming the materials from the post-filtration area. According to the waste pole piece positive electrode material recovery device, after a current collector and an active material are separated, the current collector is subjected to a chemical reaction to form gas, then the gas is condensed into liquid and recovered, meanwhile, the active material is subjected to degumming treatment, and the recovery efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery recycling, in particular to a device for recycling waste electrode positive electrode materials. Background Art

[0002] The positive electrode materials of lithium-ion batteries are mainly lithium cobalt oxide, lithium nickel cobalt manganese, lithium nickel oxide, lithium nickel cobalt aluminum and lithium iron phosphate, etc. These materials contain precious metals such as cobalt and lithium. In lithium-ion batteries, the cost of positive electrode materials accounts for about 30-40% of the total battery cost. Therefore, recycling the positive electrode materials of lithium-ion batteries is of great significance. The common positive electrode material recycling is to separate the current collector (aluminum foil) and the active material for recycling. This method requires complex mechanical equipment to separate the current collector from the active material, and the equipment manufacturing cost is high. In addition, the common separation method is to crush the positive electrode sheet and then remove the aluminum and binder in the positive electrode fragments. The process is complicated and the production cost is high. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the utility model proposes a device for recycling waste electrode positive electrode materials.

[0004] The present invention provides a waste electrode positive material recovery device, which comprises:

[0005] A reaction tank, wherein a filter plate, an elastic component and a first heating component are arranged in the reaction tank, the filter plate divides the inner cavity of the reaction tank into a reaction zone and a post-filtration zone, the reaction zone is located above the post-filtration zone, the elastic component supports the filter plate, the first heating component is arranged in the reaction zone, the reaction tank is provided with a feed pipe connected to the reaction zone, the reaction tank is provided with an air outlet pipe connected to the reaction zone, the reaction tank is provided with a discharge pipe connected to the post-filtration zone, the reaction tank is provided with an air inlet pipe, and the air inlet pipe is used to provide reaction gas to the reaction zone;

[0006] A vibration component, disposed in the reaction tank, and used for vibrating the filter plate;

[0007] A condensation component connected to the gas outlet pipe, the condensation component is used to condense the gas from the reaction zone;

[0008] A degumming component is connected to the discharge pipe, and the degumming component is used to degumming the material from the post-filtration area.

[0009] According to the waste electrode sheet positive material recovery device of the embodiment of the utility model, at least the following technical effects are achieved: the positive electrode material includes a current collector and an active material. The positive electrode material enters the reaction zone through a feed pipe and then falls onto a filter plate. The air inlet pipe provides a reaction gas to the reaction zone. Under the heating of the first heating component, the reaction gas reacts chemically with the current collector to generate a target gas. The target gas enters the condensation component through an outlet pipe. The condensation component condenses the target gas to form a target liquid. At the same time, the vibration component vibrates the filter plate, the filter plate screens the positive electrode material, the current collector remains on the filter plate and reacts chemically with the reaction gas, the active material enters the post-filter area under the filtration of the filter plate, and the active material enters the degumming component through a discharge pipe for degumming treatment. The waste electrode sheet positive material recovery device can heat the current collector and the active material together. The current collector and chlorine react chemically to form gaseous aluminum chloride, which then enters the condensation component to condense into a liquid and is recovered; at the same time, the active material preheated by the first heating component enters the post-filter area under the action of the filter plate, and then enters the degumming component for degumming treatment. The condensation process of the current collector and the debonding process of the active material can be performed simultaneously, thereby improving the recovery efficiency, reducing the equipment cost, and avoiding the need for subsequent separate aluminum removal.

[0010] According to some embodiments of the utility model, the inner circumferential wall of the reaction tank is provided with an annular groove, the outer side wall of the filter plate is inserted into the annular groove, the elastic component is arranged in the annular groove, and the elastic component is respectively connected to the filter plate and the annular groove.

[0011] According to some embodiments of the utility model, the elastic component includes a plurality of spring members, and the plurality of spring members are circumferentially distributed around the axis of the reaction tank, the lower end of the spring member is connected to the groove wall of the annular groove, and the upper end of the spring member is connected to the filter plate.

[0012] According to some embodiments of the utility model, a baffle is provided in the reaction zone, the outer wall of the baffle is in contact with and sealed with the inner wall of the reaction tank, the baffle is provided with a through hole, and one end of the feed pipe located in the reaction tank is below the baffle.

[0013] According to some embodiments of the utility model, the vibration assembly includes an eccentric motor and a vibration rod, the eccentric motor is fixedly mounted on the reaction tank, the driving end of the eccentric motor is connected to the vibration rod, the lower end of the vibration rod is fixedly connected to the filter plate, and the eccentric motor drives the vibration rod to vibrate reciprocatingly in the up and down directions.

[0014] According to some embodiments of the utility model, the vibration rod includes a first rod and a second rod, the upper end of the first rod is connected to the driving end of the eccentric motor, the lower end of the first rod is abutted against the upper end of the second rod, and the lower end of the second rod is fixedly connected to the filter plate.

[0015] According to some embodiments of the utility model, an annular baffle is provided in the reaction zone, the outer peripheral wall of the annular baffle is attached to the inner peripheral wall of the reaction tank, and the lower end of the annular baffle is fixedly connected to the filter plate.

[0016] According to some embodiments of the present utility model, the air inlet pipe is connected to the post-filter area, and the air inlet pipe is located below the filter plate.

[0017] According to some embodiments of the utility model, the condensation component includes a condenser and a recovery box, the air inlet of the condenser is connected to the air outlet, and the liquid outlet of the condenser is connected to the recovery box; an insulation material is provided between the inner circumferential wall of the reaction tank and the outer circumferential wall of the reaction tank; the filter plate is used to separate the collector and the active material from each other, the particle size of the collector is larger than the filter holes of the filter plate, and the particle size of the active material is smaller than the filter holes of the filter plate.

[0018] According to some embodiments of the utility model, the glue removal component includes a box body and a second heating component; the second heating component is arranged in the box body, the box body is connected to the discharge pipe through a pipeline, and the pipeline is provided with a pumping pump to pump the material in the post-filtration area into the box body.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 It is a schematic diagram of the structure of a waste electrode positive electrode material recovery device according to some embodiments of the utility model;

[0022] Figure 2 It is a three-dimensional cross-sectional view of a reaction tank of some embodiments of the utility model;

[0023] Figure 3 It is a cross-sectional view of a reaction tank according to some embodiments of the present invention.

[0024] Figure Number:

[0025] Reaction tank 100, filter plate 110, filter hole 111, elastic component 120, spring member 121, first heating component 130, reaction zone 141, post-filtration zone 142, feed pipe 151, gas outlet pipe 152, discharge pipe 153, gas inlet pipe 154, annular groove 161, baffle 170, through hole 171, annular baffle frame 180, thermal insulation material 190;

[0026] Vibration assembly 200, eccentric motor 210, vibration rod 220, first rod 221, second rod 222, abutment block 223;

[0027] Condensation assembly 300, condensation pipe 310, recovery box 320;

[0028] The adhesive removal component 400 , the box body 410 , the second heating component 420 , the pipeline 430 , the pumping pump 440 , the partition plate 450 , and the air outlet 460 . DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the description of the present utility model, the meaning of "more than" is more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0033] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings.

[0034] According to some embodiments of the present invention, referring to Figures 1 to 3The waste electrode positive material recovery device includes a reaction tank 100, a vibration component 200, a condensation component 300 and a degumming component 400. A filter plate 110, an elastic component 120 and a first heating component 130 are arranged in the reaction tank 100. The filter plate 110 is arranged horizontally. The filter plate 110 divides the inner cavity of the reaction tank 100 into a reaction zone 141 and a post-filter zone 142. The reaction zone 141 is located above the post-filter zone 142. The elastic component 120 supports the filter plate 110. The first heating component 130 is arranged in the reaction zone 141. The reaction tank 100 is provided with a feed pipe 151 to connect the reaction zone 141. The reaction tank 100 is provided with an outlet pipe 152 to connect the reaction zone 141. The reaction tank 100 is provided with a discharge pipe 153 to connect the post-filter zone 142. The reaction tank 100 is provided with an inlet pipe 154, and the inlet pipe 154 is used to provide reaction gas to the reaction zone 141. The vibration assembly 200 is provided in the reaction tank 100, and the vibration assembly 200 is used to vibrate the filter plate 110. The condensation assembly 300 is connected to the gas outlet pipe 152, and the condensation assembly 300 is used to condense the gas from the reaction zone 141. The degumming assembly 400 is connected to the discharge pipe 153, and the degumming assembly 400 is used to degumming the material from the post-filtration zone 142.

[0035] In this embodiment, the positive electrode material includes a current collector and an active material. The current collector is aluminum foil. The positive electrode material enters the reaction zone 141 through the feed pipe 151 and falls on the filter plate 110. The gas inlet pipe 154 provides a reaction gas to the reaction zone 141. The reaction gas is chlorine. Under the heating of the first heating component 130, it is heated to 320 degrees to 380 degrees. The chlorine reacts chemically with the aluminum foil to generate gaseous aluminum chloride, 2Al+3Cl 2 =2AlCl 3 Aluminum chloride is in gaseous state at high temperature. Gaseous aluminum chloride enters condensation assembly 300 through outlet pipe 152. Condensation assembly 300 condenses gaseous aluminum chloride to form liquid aluminum chloride. Vibration assembly 200 vibrates filter plate 110. Filter plate 110 screens positive electrode material. Since the particle size of the current collector is larger than the filter hole 111 of filter plate 110, and the particle size of the active material is smaller than the filter hole 111 of filter plate 110, the current collector remains on filter plate 110 for chemical reaction. After the active material is preheated by the first heating assembly 130, it enters post-filtration zone 142 through filter plate 110. The active material then enters degumming assembly 400 through outlet pipe 153 for high-temperature degumming treatment.

[0036] Preferably, the first heating component 130 is an electric heating wire, and the first heating component 130 is disposed on the upper end surface of the filter plate 110 to increase the contact area between the first heating component 130 and the current collector and to increase the heating rate of the current collector.

[0037] The waste electrode positive material recovery device can heat the current collector and the active material together. The current collector and chlorine react chemically to form gaseous aluminum chloride, which then enters the condensation component 300 to condense into liquid and be recovered; at the same time, the active material preheated by the first heating component 130 enters the post-filtration area 142 under the action of the filter plate 110, and then enters the degumming component 400 for degumming treatment. The condensation treatment of the current collector and the degumming treatment of the active material can be carried out simultaneously, thereby improving the recovery efficiency, reducing the equipment cost, and avoiding the need for separate aluminum removal in the future.

[0038] Preferably, refer to Figure 2 and Figure 3 The inner peripheral wall of the reaction tank 100 is provided with an annular groove 161, the outer side wall of the filter plate 110 is inserted into the annular groove 161, and the elastic component 120 is provided in the annular groove 161, and the elastic component 120 is respectively connected to the annular groove 161 and the filter plate 110. The elastic component 120 includes a plurality of spring members 121, and the plurality of spring members 121 are circumferentially distributed around the axis of the reaction tank 100, the lower end of the spring member 121 is connected to the groove wall of the annular groove 161, and the upper end of the spring member 121 is connected to the filter plate 110, and the plurality of spring members 121 jointly support the filter plate 110.

[0039] Preferably, refer to Figure 2 and Figure 3 The air inlet pipe 154 is connected to the post-filter area 142, and the air inlet pipe 154 is located below the filter plate 110 and the annular groove 161, and the annular groove 161 is located between the air inlet pipe 154 and the feed pipe 151. When the chlorine gas enters the post-filter area 142 from the air inlet pipe 154, the chlorine gas passes through the filter plate 110 from bottom to top and then contacts the first heating assembly 130 and the current collector, so that the chlorine gas can fully contact the current collector to ensure that a chemical reaction occurs fully.

[0040] Reference Figure 2 and Figure 3 A baffle 170 is provided in the reaction zone 141, the outer wall of the baffle 170 is attached to and sealed with the inner wall of the reaction tank 100, the baffle 170 is provided with a through hole 171, and one end of the feed pipe 151 located in the reaction tank 100 is below the baffle 170. The baffle 170 can block most of the chlorine gas from flowing upward directly, increase the concentration of the chlorine gas in the reaction zone 141, and ensure that the chlorine gas can fully react chemically with the current collector.

[0041] Reference Figure 2 and Figure 3The vibration assembly 200 includes an eccentric motor 210 and a vibration rod 220. The eccentric motor 210 is fixedly mounted on the reaction tank 100. The driving end of the eccentric motor 210 is connected to the vibration rod 220. The lower end of the vibration rod 220 is fixedly connected to the filter plate 110. The eccentric motor 210 can drive the vibration rod 220 to vibrate back and forth in the up and down directions, thereby driving the filter plate 110 to vibrate back and forth in the up and down directions.

[0042] Further, see Figure 3 The vibration rod 220 includes a first rod 221 and a second rod 222. The upper end of the first rod 221 is connected to the driving end of the eccentric motor 210. The upper end of the second rod 222 is provided with an abutment block 223. The lower end of the first rod 221 abuts against the abutment block 223 at the upper end of the second rod 222. The lower end of the second rod 222 is fixedly connected to the filter plate 110. When the eccentric motor 210 drives the first rod 221 to vibrate, the first rod 221 drives the abutment block 223 and the second rod 222 to move downward, thereby driving the filter plate 110 to move downward. After the spring member 121 is compressed downward by the filter plate 110, the spring member 121 pushes the filter plate 110 upward again. With the cooperation of the spring member 121 and the eccentric motor 210, the filter plate 110 can vibrate back and forth in the up and down directions.

[0043] Preferably, the second rod 222 passes through the through hole 171 of the baffle 170 , and there is a certain gap between the outer peripheral wall of the second rod 222 and the hole wall of the through hole 171 to allow gas to pass through.

[0044] Reference Figure 2 and Figure 3 An annular baffle 180 is provided in the reaction zone 141, the outer peripheral wall of the annular baffle 180 is attached to the inner peripheral wall of the reaction tank 100, and the lower end of the annular baffle 180 is fixedly connected to the filter plate 110. The annular baffle 180 can prevent the positive electrode material from falling from the feed pipe 151 and entering the annular groove 161, thereby avoiding blocking the annular groove 161 and affecting the use of the spring member 121.

[0045] Reference Figure 2 and Figure 3 A heat-insulating material 190 is provided between the inner wall of the reaction tank 100 and the outer wall of the reaction tank 100 to reduce heat loss, ensure a constant temperature in the reaction tank 100, and improve reaction efficiency.

[0046] Reference Figure 1 The condensation assembly 300 includes a condensation tube 310 and a recovery box 320 . The air inlet of the condensation tube 310 is connected to the air outlet pipe 152 , and the liquid outlet of the condensation tube 310 is connected to the recovery box 320 .

[0047] Reference Figure 1The degumming assembly 400 includes a box body 410 and a second heating assembly 420. The second heating assembly 420 is arranged at the top of the box body 410. The box body 410 is connected to the discharge pipe 153 through a pipeline 430. The pipeline 430 is provided with a pumping pump 440 to pump the material in the post-filtration area 142 into the box body 410. A partition 450 is arranged in the box body 410, and the partition 450 is used to carry the active material. The top of the box body 410 is provided with an air outlet 460 to maintain the balance of internal and external air pressure, so as to avoid safety accidents such as holes or explosions caused by excessive air pressure after heating inside the box body 410.

[0048] It can be understood that after being preheated in the reaction tank 100, the active material enters the box 410 for further heating under the transportation of the pumping pump 440, and the second heating component 420 heats the inside of the box 410 to 600 degrees, thereby removing the binder (such as PVDF) in the active material and obtaining the required metal material (composite oxide materials mainly composed of non-ferrous metal elements such as Li, Co, Ni, Mn, such as LiCoO2, Li(Co, Ni)O2, Li(Co, Ni, Mn)O2).

[0049] In the description of this specification, the description with reference to the term "some embodiments" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0050] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A device for recycling waste electrode positive electrode materials, characterized in that: include: A reaction tank (100), wherein a filter plate (110), an elastic component (120) and a first heating component (130) are arranged in the reaction tank (100), wherein the filter plate (110) divides the inner cavity of the reaction tank (100) into a reaction zone (141) and a post-filtration zone (142), wherein the reaction zone (141) is located above the post-filtration zone (142), wherein the elastic component (120) supports the filter plate (110), and wherein the first heating component (130) is arranged in the reaction zone (141), the reaction tank (100) is provided with a feed pipe (151) connected to the reaction zone (141), the reaction tank (100) is provided with a gas outlet pipe (152) connected to the reaction zone (141), the reaction tank (100) is provided with a discharge pipe (153) connected to the post-filtration zone (142), the reaction tank (100) is provided with an air inlet pipe (154), and the air inlet pipe (154) is used to provide reaction gas to the reaction zone (141); A vibration component (200), disposed in the reaction tank (100), the vibration component (200) being used to vibrate the filter plate (110); A condensation component (300) connected to the gas outlet pipe (152), the condensation component (300) being used to condense the gas from the reaction zone (141); A degumming component (400) is connected to the discharge pipe (153), and the degumming component (400) is used to perform degumming treatment on the material from the post-filtration area (142).

2. The waste electrode positive material recovery device according to claim 1, characterized in that: The inner peripheral wall of the reaction tank (100) is provided with an annular groove (161), the outer side wall of the filter plate (110) is inserted into the annular groove (161), the elastic component (120) is arranged in the annular groove (161), and the elastic component (120) is respectively connected to the filter plate (110) and the annular groove (161).

3. The waste electrode positive material recovery device according to claim 2, characterized in that: The elastic component (120) comprises a plurality of spring members (121), the plurality of spring members (121) being distributed circumferentially around the axis of the reaction tank (100), the lower ends of the spring members (121) being connected to the groove wall of the annular groove (161), and the upper ends of the spring members (121) being connected to the filter plate (110).

4. The waste electrode positive material recovery device according to claim 1, characterized in that: A baffle (170) is provided in the reaction zone (141), the outer wall of the baffle (170) is in contact with and sealed against the inner wall of the reaction tank (100), the baffle (170) is provided with a through hole (171), and one end of the feed pipe (151) located in the reaction tank (100) is below the baffle (170).

5. The waste electrode positive material recovery device according to claim 1, characterized in that: The vibration assembly (200) comprises an eccentric motor (210) and a vibration rod (220); the eccentric motor (210) is fixedly mounted on the reaction tank (100); the driving end of the eccentric motor (210) is connected to the vibration rod (220); the lower end of the vibration rod (220) is fixedly connected to the filter plate (110); and the eccentric motor (210) drives the vibration rod (220) to vibrate back and forth in an up and down direction.

6. The waste electrode positive material recovery device according to claim 5, characterized in that: The vibration rod (220) comprises a first rod (221) and a second rod (222); the upper end of the first rod (221) is connected to the driving end of the eccentric motor (210); the lower end of the first rod (221) abuts against the upper end of the second rod (222); and the lower end of the second rod (222) is fixedly connected to the filter plate (110).

7. The waste electrode positive material recovery device according to claim 1, characterized in that: An annular baffle (180) is provided in the reaction zone (141), the outer peripheral wall of the annular baffle (180) is attached to the inner peripheral wall of the reaction tank (100), and the lower end of the annular baffle (180) is fixedly connected to the filter plate (110).

8. The waste electrode positive material recovery device according to claim 1, characterized in that: The air inlet pipe (154) is connected to the post-filter area (142), and the air inlet pipe (154) is located below the filter plate (110).

9. The waste electrode positive material recovery device according to claim 1, characterized in that: The condensation component (300) includes a condenser (310) and a recovery box (320), wherein the air inlet of the condenser (310) is connected to the air outlet pipe (152), and the liquid outlet of the condenser (310) is connected to the recovery box (320); a heat-insulating material (190) is provided between the inner peripheral wall of the reaction tank (100) and the outer peripheral wall of the reaction tank (100); the filter plate (110) is used to separate the current collector and the active material from each other, the particle size of the current collector is larger than the filter hole (111) of the filter plate (110), and the particle size of the active material is smaller than the filter hole (111) of the filter plate (110).

10. The waste electrode positive material recovery device according to claim 1, characterized in that: The glue removal component (400) includes a box body (410) and a second heating component (420); the second heating component (420) is arranged in the box body (410), and the box body (410) is connected to the discharge pipe (153) through a pipeline (430), and the pipeline (430) is provided with a pumping pump (440) to pump the material in the post-filtration area (142) into the box body (410).

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