Automatic feeding system

Abstract

The utility model belongs to the technical field of transportation devices, and particularly provides an automatic feeding system. The device is used for supplying an ethylene carbonate solution to the negative electrode slurry batching container; comprising a drying oven used for melting ethylene carbonate and provided with a first discharge port; one end of the first pipeline is connected to the first discharging opening, the other end of the first pipeline is assembled to an ethylene carbonate batching container, and a heating unit used for keeping ethylene carbonate in a liquid state is arranged in the first pipeline; according to the utility model, the ethylene carbonate is pre-dissolved by the deionized water, and is injected into the batching container of the negative electrode slurry in a liquid ethylene carbonate (namely the ethylene carbonate solution) manner, so that only the first pipeline for conveying the molten ethylene carbonate from the drying oven to the batching container of the ethylene carbonate solution needs to be heated; therefore, the proportion of the part needing to be heated in the whole automatic feeding system is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of transportation devices, and in particular relates to an automatic feeding system. Background Art

[0002] In the manufacturing process of lithium-ion batteries, adding ethylene carbonate (EC) at a concentration of 2% to the aqueous negative electrode slurry can effectively improve the problem of cracking of the negative electrode after coating. However, ethylene carbonate is solid at room temperature and needs to be heated and melted in a baking furnace, and then processed by equipment such as suction guns, diaphragm pumps and storage tanks before being added to the aqueous negative electrode slurry.

[0003] Since ethylene carbonate is converted into a crystalline state after the temperature is lowered in the above process, it is easy to cause pipeline blockage. In order to solve the above technical problems, it is necessary to configure a heating device for the automatic feeding system (filling ethylene carbonate) to keep the temperature of the entire automatic feeding system above 40°C. Obviously, the above method not only requires adding an additional heating device to the automatic feeding system, but also increases energy consumption in the process of heating the entire automatic feeding system.

[0004] Based on this, it is urgent to invent an automatic feeding system to solve the above-mentioned technical problems. Utility Model Content

[0005] The technical problem to be solved by the utility model is how to reduce the proportion of the portion to be heated in the entire automatic feeding system. In view of the above problem, an automatic feeding system is provided.

[0006] The technical solution of the utility model to solve the above technical problems is to provide an automatic feeding system for supplying ethylene carbonate solution to the negative electrode slurry batching container; comprising:

[0007] an oven for melting ethylene carbonate and having a first discharge port;

[0008] One end of the first pipeline is connected to the first discharge port, and the other end is assembled to the batching container of ethylene carbonate. A heating unit for keeping ethylene carbonate in a liquid state is arranged in the first pipeline.

[0009] Preferably, the temperature of the first conduit is higher than 40°C.

[0010] Specifically, it also includes:

[0011] A stirring tank connected to the output end of the first pipeline and used to transport the melted ethylene carbonate, and the stirring tank includes a first feed port;

[0012] The second pipeline is connected with the first feed port and conveys deionized water into the stirring tank, and forms an ethylene carbonate solution after mixing in the stirring tank.

[0013] More specifically, the stirring tank is equipped with a weighing unit for weighing the weight of the melted ethylene carbonate;

[0014] The automatic feeding system further comprises: a control unit electrically connected to the weighing unit and used to manipulate the second pipeline to input a predetermined volume of deionized water into the stirring tank and make the concentration of the ethylene carbonate solution be 50 g / L to 200 g / L.

[0015] More specifically, the stirring tank further comprises a second discharge port;

[0016] The automatic feeding system also includes a filter which is communicated with the second discharge port and filters out impurities in the ethylene carbonate solution, and the output end of the filter is connected to the negative electrode slurry batching container.

[0017] Preferably, the filter is a magnetic filter.

[0018] More specifically, it also includes a metering device installed at the output end of the filter, and the metering device is also electrically connected to the control unit to output the ethylene carbonate solution to the ingredient container of the negative electrode slurry as needed.

[0019] More specifically, it also includes a third pipe with two ends respectively assembled to the stirring tank and the filter, and the third pipe is provided with a power unit for supplying power to the ethylene carbonate solution.

[0020] Preferably, the power unit is a diaphragm pump.

[0021] In any of the foregoing specific embodiments, one-way valves are installed on both the first pipeline and the second pipeline.

[0022] The beneficial effect of the utility model is that ethylene carbonate is pre-dissolved in deionized water and added to the negative electrode slurry batching container in the form of liquid ethylene carbonate (i.e., ethylene carbonate solution), so that only the first pipe used to transport the melted ethylene carbonate from the oven to the ethylene carbonate solution batching container needs to be heated, thereby reducing the proportion of the required heating part in the entire automatic feeding system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the implementation modes of the present invention, the drawings required for use in the description of the implementation modes will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of the automatic feeding system of the utility model;

[0025] Figure 2 It is a system module diagram of the automatic feeding system of the utility model.

[0026] Reference numerals:

[0027] 1-Automatic feeding system;

[0028] 10- oven; 100- first discharge port; 11- first pipeline; 12- second pipeline; 110, 120- one-way valve;

[0029] 13-mixing tank; 130-first feed port; 131-second discharge port; 132-weighing unit; 14-filter; 15-third pipeline; 150-power unit; 16-negative electrode slurry batching container; 17-control unit; 18-metering device; 19-heating unit. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Implementation Method 1

[0032] refer to Figure 1 and Figure 2The utility model provides an automatic feeding system 1 for supplying a negative electrode slurry container with ethylene carbonate solution. The automatic feeding system 1 includes an oven 10 and a first pipe 11 connected to the oven 10, so as to transport the melted ethylene carbonate in the oven 10 to the batching container of ethylene carbonate through the first pipe 11. Specifically, the oven 10 is used to melt ethylene carbonate and has a first discharge port 100, and one end of the first pipe 11 is connected to the first discharge port 100, and the other end is assembled to the batching container of ethylene carbonate (that is, the stirring tank 13, refer to the following for details). Since the solid ethylene carbonate is melted by heat in the oven 10, the temperature of the ethylene carbonate is reduced when passing through the suction gun, diaphragm pump, storage tank and other equipment, causing the ethylene carbonate to crystallize easily and block the pipeline, so it is necessary to supply the entire automatic feeding system 1 with heating, thereby improving the technical solution of the present application. The technical solution of the present application is to mix the melted ethylene carbonate with deionized water and then add the liquid ethylene carbonate (i.e., ethylene carbonate solution) into the negative electrode slurry batching container 16. That is, only the first pipe 11 for conveying the melted ethylene carbonate needs to be heated, so the first pipe 11 is provided with a heating unit 19 for keeping the ethylene carbonate in a liquid state.

[0033] More specifically, in order to reduce energy consumption, without adding an additional power unit 150, the melted ethylene carbonate is transported to the stirring tank 13 via the first pipe 11, so the height of the oven 10 relative to the ground is greater than the height of the stirring tank 13 relative to the ground, so that the melted ethylene carbonate can be transported under the action of gravity.

[0034] Implementation Method 2

[0035] The difference between this embodiment and embodiment 1 is that since the melting point of ethylene carbonate is 40° C., the temperature of the first pipe 11 is higher than 40° C. to ensure that the ethylene carbonate passing through the first pipe 11 is always in a liquid state, thereby preventing the first pipe 11 from being blocked. The other parts of this embodiment are the same as those of embodiment 1 and are not described in detail here.

[0036] Implementation 3

[0037] The difference between this embodiment and embodiment 1 is that in order to mix the melted ethylene carbonate with deionized water to form an ethylene carbonate solution, the automatic feeding system 1 also includes a stirring tank 13 connected to the output end of the first pipeline 11 and used to transport the melted ethylene carbonate. Among them, the stirring tank 13 includes a first feed port 130 for inputting materials. Afterwards, in order to realize the filling of deionized water into the stirring tank 13, the automatic feeding system 1 also includes a second pipeline 12, and the second pipeline 12 is connected to the first feed port 130 and transports deionized water into the stirring tank 13, and the deionized water is mixed with the melted ethylene carbonate through the stirring tank 13 to form an ethylene carbonate solution. And the other parts of this embodiment are the same as those in embodiment 1, which will not be repeated here.

[0038] Implementation 4

[0039] The difference between this embodiment and embodiment 3 is that in order to ensure the concentration of ethylene carbonate added to the batching container 16 of the negative electrode slurry, a weighing unit 132 for weighing the mass of ethylene carbonate input is installed on the stirring tank 13. Obviously, in order to make the concentration of the ethylene carbonate solution within a preset range, the self-determined feeding system also includes a control unit 17 that controls the volume of deionized water added to be in a certain proportion to the mass of ethylene carbonate input to the stirring tank 13, and the control unit 17 is electrically connected to the weighing unit 132 and is used to control the second pipeline 12 to input a predetermined volume of deionized water into the stirring tank 13 and make the concentration of the ethylene carbonate solution 50g / L to 200g / L. Obviously, the volume of deionized water input to the stirring tank 13 corresponds to the mass of ethylene carbonate input to the stirring tank 13. In this specific embodiment, the concentration of the ethylene carbonate solution is 200g / L. In other specific embodiments, the concentration of the ethylene carbonate solution is not limited. And the other parts of this embodiment are the same as those in embodiment 3, and are not repeated here.

[0040] Implementation method 5

[0041] The difference between this embodiment and embodiment 3 is that: in order to ensure the purity of the ethylene carbonate solution, the stirring tank 13 also includes a second discharge port 131, and the automatic feeding system 1 also includes a filter 14 connected to the second discharge port 131 and used to filter out impurities (mainly magnetic impurities) in the ethylene carbonate solution, and then the filtered ethylene carbonate solution needs to be transported to the negative electrode slurry batching container 16 via a pipeline. In other words, the output end of the filter 14 is connected to the negative electrode slurry batching container. And the other parts of this embodiment are the same as those in embodiment 3, and will not be repeated here.

[0042] Implementation 6

[0043] The difference between this embodiment and embodiment 5 is that since the aforementioned impurities are mainly magnetic impurities, the filter 14 can be a magnetic filter 14. Of course, in other specific embodiments, the filter 14 can also be other types of filters 14. The other parts of this embodiment are the same as those of embodiment 5, and will not be described in detail here.

[0044] Implementation 7

[0045] The difference between this embodiment and embodiment 5 is that: in order to ensure the accuracy of adding ethylene carbonate solution, the automatic feeding system also includes a metering device 18 installed at the output end of the filter 14, and the metering device 18 is also electrically connected to the control unit 17 to output the ethylene carbonate solution to the negative electrode slurry batching container 16 as needed. The other parts of this embodiment are the same as those of embodiment 5, and will not be repeated here.

[0046] Implementation 8

[0047] The difference between this embodiment and embodiment 5 is that, in order to improve the delivery efficiency of the ethylene carbonate solution, the automatic feeding system 1 further includes a third pipe 15 whose two ends are respectively assembled to the stirring tank 13 and the filter 14, and a power unit 150 for supplying power for delivering the ethylene carbonate solution is arranged on the third pipe 15. The other parts of this embodiment are the same as those of embodiment 5, and will not be described in detail here.

[0048] Implementation method 9

[0049] The difference between this embodiment and embodiment 8 is that the diaphragm pump can not only transport media with special properties such as high viscosity, high solid content, volatility, flammability, and explosion, but also can transport in both directions, that is, the transport direction is not restricted. In addition, the diaphragm pump also has the advantages of self-priming performance, no leakage, and easy maintenance, so the power unit 150 can be a diaphragm pump. Of course, in other specific embodiments, the power unit 150 can also use other power units 150. The other parts of this embodiment are the same as embodiment 8, and will not be repeated here.

[0050] Embodiment 10

[0051] The difference between this embodiment and the above-mentioned embodiment is that: while meeting the requirements of the automatic filling system, the manufacturing cost of the automatic filling system is reduced as much as possible, so both the first pipe 11 and the second pipe 12 are equipped with a one-way valve (110, 120). The other parts of this embodiment are the same as those of the other embodiments, and will not be described in detail here.

[0052] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. An automatic feeding system for supplying ethylene carbonate solution to a negative electrode slurry batching container; characterized in that: include: an oven for melting ethylene carbonate and having a first discharge port; One end of the first pipeline is connected to the first discharge port, and the other end is assembled to the batching container of ethylene carbonate. A heating unit for keeping ethylene carbonate in a liquid state is arranged in the first pipeline.

2. The automatic feeding system according to claim 1, characterized in that: The temperature of the first pipe is higher than 40°C.

3. The automatic feeding system according to claim 1, characterized in that: Also includes: A stirring tank connected to the output end of the first pipeline and used to transport the melted ethylene carbonate, and the stirring tank includes a first feed port; The second pipeline is connected with the first feed port and conveys deionized water into the stirring tank, and forms an ethylene carbonate solution after mixing in the stirring tank.

4. The automatic feeding system according to claim 3, characterized in that: The stirring tank is provided with a weighing unit for weighing the weight of the input ethylene carbonate; The automatic feeding system further comprises: a control unit electrically connected to the weighing unit and used to manipulate the second pipeline to input a predetermined volume of deionized water into the stirring tank and make the concentration of the ethylene carbonate solution be 50 g / L to 200 g / L.

5. The automatic feeding system according to claim 4, characterized in that: The stirring tank also includes a second discharge port; The automatic feeding system also includes a filter which is communicated with the second discharge port and filters out impurities in the ethylene carbonate solution, and the output end of the filter is connected to the negative electrode slurry batching container.

6. The automatic feeding system according to claim 5, characterized in that: The filter is a magnetic filter.

7. The automatic feeding system according to claim 5, characterized in that: It also includes a metering device installed at the output end of the filter, and the metering device is also electrically connected to the control unit to output the ethylene carbonate solution to the ingredient container of the negative electrode slurry as needed.

8. The automatic feeding system according to claim 5, characterized in that: The invention also comprises a third pipeline with two ends respectively assembled to the stirring tank and the filter, and the third pipeline is provided with a power unit for supplying power to the ethylene carbonate solution.

9. The automatic feeding system according to claim 8, characterized in that: The power unit is a diaphragm pump.

10. The automatic feeding system according to any one of claims 3 to 9, characterized in that: One-way valves are installed on both the first pipeline and the second pipeline.

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