Square lithium battery formation waste liquid collecting and pipeline cleaning system

Abstract

The utility model discloses a square lithium battery formation waste liquid collecting and pipeline cleaning system which comprises a first collecting pipe, a second collecting pipe, a third collecting pipe and a fourth collecting pipe. The gas-liquid separator is used for separating waste gas from waste liquid, the gas-liquid separator is provided with an inlet used for being connected with the first collecting pipe, the gas-liquid separator is further provided with an exhaust port used for exhausting the waste gas and a first liquid outlet used for discharging the waste liquid, the first liquid outlet is connected with a collecting cup, and a second liquid outlet and a second collecting pipe are arranged at the bottom of the collecting cup; each second collecting pipe is used for collecting waste liquid separated by the plurality of gas-liquid separators, and the second liquid outlet in the collecting cup corresponding to each gas-liquid separator is connected with the second collecting pipe; and the collecting tank is used for collecting the waste liquid from each second collecting pipe. The system provided by the utility model can effectively improve the waste liquid recovery efficiency and save human resources.

Description

Technical Field

[0001] The utility model belongs to lithium-ion battery equipment, and particularly relates to a system for collecting waste liquid generated during the formation of square lithium batteries and cleaning pipelines. Background Art

[0002] When forming square batteries, in order to discharge the gas generated during the first charge of the batteries, a negative pressure forming method is generally adopted. Therefore, the electrolyte and its vapor will be discharged together with the vacuum pumping operation. During the process of the electrolyte discharging from the equipment, in order to prevent the electrolyte from corroding the vacuum pipeline and the vacuum pump, it is necessary to pass through a gas-liquid separator for gas-liquid separation, and the electrolyte flows into the collection cup. The traditional collection and drainage method is to discharge one or several gas-liquid separators into the collection tank, and it is necessary to collect each device one by one, which is inconvenient for treating waste liquid and wastes a lot of labor.

[0003] At the same time, there will be electrolyte accumulation and wall hanging in the vacuum pipeline and interface, and there will be foreign matters such as deteriorated electrolyte and electrolyte crystallization, so it needs to be cleaned regularly. Cleaning process: ① Pass the cleaning liquid (such as DMC, etc.) into the suction nozzle and pipeline through the tooling; when directly passing through the gas-liquid separator, during the process of quickly discharging the waste liquid, it is easy to cause crystallization and block the gas-liquid separator; ② It is necessary to connect a lot of external pipelines, the operation is complex, and it is easy to damage the equipment.

[0004] Patent document CN220737836U discloses a recycling device for lithium batteries, including a crushing box, a feeding bin is fixedly installed at the upper end of the crushing box, a fixing frame is fixedly connected to the lower end of the crushing box, a crushing roller is arranged inside the crushing box, a driving motor is arranged at the rear end of the crushing box, the lower end of the driving motor is fixedly connected to the fixing frame through a connecting frame, a conveying cylinder is arranged inside the fixing frame, a discharging bin is arranged at the lower end of the crushing box, and a waste liquid box is arranged at the lower end of the conveying cylinder.

[0005] Patent document CN220189742U discloses a device for recycling waste liquid of lithium batteries, including a vacuum drying drum, an electrolyte recovery unit, a waste liquid regeneration unit connected in sequence through pipelines, and a tail gas absorption unit connected to the electrolyte recovery unit; the electrolyte recovery unit includes a first condenser, a crude solvent storage and distillation kettle, a second condenser, and a storage and adjustment distillation kettle connected in sequence; the waste liquid regeneration unit includes a molecular sieve adsorption column and a solvent re-preparation kettle connected in sequence, and the storage and adjustment distillation kettle is connected to the molecular sieve adsorption column. Content of the Utility Model

[0006] The purpose of the utility model is to provide a system for collecting waste liquid generated during the formation of square lithium batteries and cleaning pipelines, which can effectively improve the efficiency of waste liquid recovery and save human resources.

[0007] To achieve the object of the present utility model, the following technical solutions are provided: A system for collecting formation waste liquid of square lithium batteries and cleaning pipelines. The top surface of the square lithium battery has a liquid injection hole. The system for collecting formation waste liquid of square lithium batteries and cleaning pipelines includes:

[0008] A first manifold. A number of suction pipes are connected to each first manifold, and a suction nozzle for mating with the liquid injection hole is provided at the end of each suction pipe.

[0009] A gas-liquid separator for separating exhaust gas and waste liquid. The gas-liquid separator has an inlet for connecting the first manifold, and the gas-liquid separator also has an exhaust port for discharging exhaust gas and a first liquid discharge port for discharging waste liquid. The first liquid discharge port is connected to a collection cup, and a second liquid discharge port is provided at the bottom of the collection cup.

[0010] A second manifold. Each second manifold is used for collecting the waste liquid separated by a number of gas-liquid separators. The second liquid discharge port on the collection cup corresponding to each gas-liquid separator is connected to the second manifold, and an electric valve for controlling liquid discharge is provided at the second liquid discharge port.

[0011] A collection tank for collecting the waste liquid from each second manifold.

[0012] Specifically, it further includes a main collection manifold. Each second manifold is connected to the main collection manifold, the main collection manifold is connected to the collection tank, and a diaphragm pump for driving the waste liquid into the collection tank is also provided on the main collection manifold.

[0013] Specifically, one end of the main collection manifold is connected to the collection tank, and the other end serves as a cleaning liquid inlet. Moreover, a first cleaning valve for controlling the opening and closing of the cleaning liquid inlet is provided at the cleaning liquid inlet.

[0014] Specifically, the end of the main collection manifold serving as the cleaning liquid inlet bends upward, and a funnel for pouring the cleaning liquid is provided at the cleaning liquid inlet.

[0015] Specifically, the collection tank is provided with a liquid level sensor, and a liquid discharge valve is provided at the bottom of the collection tank.

[0016] Specifically, a cleaning branch is also provided between the end of the first manifold connected to the gas-liquid separator and the end of the second manifold connected to the second liquid discharge port. A second cleaning valve is provided on the cleaning branch.

[0017] A third cleaning valve is provided on a section of the first manifold between the connection to the gas-liquid separator and the connection to the cleaning branch.

[0018] Specifically, it further includes a cleaning liquid tank. A pressing plate is provided on the cleaning liquid tank. Suction holes are provided on the top surface of the pressing plate. The number of suction holes on the top surface of each pressing plate is the same as and corresponds one-to-one to the number of suction nozzles corresponding to one first manifold.

[0019] A liquid suction pipe with one end communicating with the liquid suction hole and the other end communicating with the bottom of the cleaning liquid tank is further arranged on the pressing plate, and one liquid suction pipe corresponds to each liquid suction hole.

[0020] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0021] Through the cooperation between multiple pipelines and equipment, automatic collection of waste liquid in multiple storage positions is realized, so as to discharge the waste liquid centrally, and further reduce the labor cost of waste liquid recovery and cleaning. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of a square lithium battery formation waste liquid collection and pipeline cleaning system provided by this embodiment;

[0023] In the figure, 1, vacuum tube; 2, gas-liquid separator; 3-1, first drain port; 3-2, second drain port; 4, collection cup; 5, liquid level sensor; 6, funnel; 6-1, first cleaning valve; 7, confluence main pipe; 8, square lithium battery; 9, suction nozzle; 10, first confluence pipe; 11, steel wire hose; 12, second confluence pipe; 13, electric valve; 14, three-way joint; 15, pressing plate; 16, liquid suction pipe; 17, cleaning liquid tank; 18, cleaning branch; 19, collection tank; 20, drain valve; 21, diaphragm pump. Detailed Embodiment

[0024] In order to make the purpose, technical solution and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0025] As Figure 1 shown, it is a square lithium battery formation waste liquid collection and pipeline cleaning system provided by this embodiment. A liquid injection hole is arranged at the top of the square lithium battery 8 in the figure, and the specific structure of the square lithium battery formation waste liquid collection and pipeline cleaning system used in cooperation is as follows:

[0026] The first confluence pipe 10, several suction pipes are connected to each first confluence pipe 10, and a suction nozzle 9 for cooperating with the liquid injection hole is arranged at the end of each suction pipe.

[0027] A third cleaning valve is arranged on a section of the first confluence pipe between the connection of the gas-liquid separator and the connection of the cleaning branch.

[0028] The gas-liquid separator 2 is used to separate waste gas and waste liquid. The gas-liquid separator 2 has an inlet for connecting the first manifold 10. In addition, the gas-liquid separator 2 also has an exhaust port for discharging waste gas and a first liquid discharge port 3-1 for discharging waste liquid. The first liquid discharge port 3-1 is connected to the collection cup 4, and the bottom of the collection cup 4 is provided with a second liquid discharge port 3-2.

[0029] One end of the first manifold 10 where it is connected to the gas-liquid separator 2 is connected to one end of the second manifold 12. The other end of the second manifold 12 is externally connected to a cleaning branch 18 through a tee joint 14. The cleaning branch 18 is provided with a second cleaning valve, and a cleaning liquid tank 17 is provided on the cleaning branch 18. A pressing plate 15 is provided on the cleaning liquid tank 17. The top surface of the pressing plate 15 is provided with liquid suction holes. The number of liquid suction holes on the top surface of each pressing plate 15 is the same as and corresponds one-to-one to the number of suction nozzles 9 corresponding to one first manifold 10. In addition, a liquid suction pipe 16 with one end communicating with the liquid suction hole and the other end communicating with the bottom of the cleaning liquid tank 17 is also provided on the pressing plate 15. One liquid suction pipe 16 corresponds to each liquid suction hole.

[0030] The second manifold 12, each second manifold 12 is used to collect the waste liquid separated by several gas-liquid separators 2. The second liquid discharge port 3-2 on the collection cup 4 corresponding to each gas-liquid separator 2 is connected to the second manifold 12. An electric valve 13 for controlling liquid discharge is provided at the second liquid discharge port 3-2.

[0031] The collection tank 19 is used to collect the waste liquid from each second manifold 12. A drain valve 20 is also provided at the bottom of the collection tank 19 to facilitate regular sewage discharge.

[0032] More specifically, multiple second manifolds 12 converge all the waste liquid through a converging main pipe 7. One end of the converging main pipe 7 is provided with a diaphragm pump 21, and all the waste liquid is pumped into the collection tank 19 through the diaphragm pump 21. In addition, the other end of the converging main pipe 7 is bent upward at the end where the cleaning liquid inlet is located, and a funnel 6 for pouring the cleaning liquid is provided at the cleaning liquid inlet, so that it is not necessary to disassemble and clean the converging main pipe 7. Only the cleaning liquid needs to be poured and the inner wall is flushed by the suction force generated by the diaphragm pump 21. In addition, a ball valve is provided at the cleaning liquid inlet, which is normally closed to prevent the diaphragm pump from sucking air.

[0033] The specific working process of the system provided in this embodiment is as follows:

[0034] The inside of the system is in a negative pressure state connected by a vacuum pipeline. When the battery is forming, gas, bubbles, etc. are sucked out through the suction nozzles. After passing through the gas-liquid separator, the vacuum gas and electrolyte are separated. The relatively clean gas is sucked into the vacuum pump and discharged to the waste gas treatment system. The electrolyte flows into the collection cup through the first liquid discharge port. After being filled, the drain valve is manually opened to connect the waste liquid from the second liquid discharge port, and then the waste liquid at the same position is statistically concentrated into the converging main pipe by the second manifold;

[0035] After multiple second manifolds discharge waste liquid into the main manifold, it is pumped to the collection tank by a diaphragm pump;

[0036] A funnel is designed at the end of another pipeline of the main manifold. By opening the first cleaning valve, it is convenient to pour in cleaning liquid to clean the pipeline.

[0037] Meanwhile, the liquid is sucked into the pipeline by negative pressure, and the second cleaning valve is opened, so that during cleaning, the diaphragm pump evacuates to suck the cleaning liquid into the pipeline and finally into the collection tank.

[0038] In summary, the utility model can solve the problem of crystallization blockage of the electrolyte at the gas-liquid separator. At the same time, by adding a cleaning agent recovery on the waste liquid collection system, it facilitates the pipeline cleaning process. It saves costs, reduces energy consumption, and increases the service life of the equipment.

[0039] In addition, the terms "upper", "lower", "inner", "outer", "front", and "rear" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. Unless otherwise specifically stated, the relative steps, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of the utility model.

[0040] Of course, the above are only specific embodiments of the utility model and do not limit the scope of implementation of the utility model. Any equivalent changes or modifications made according to the structure, features, and principles described in the scope of the patent application of the utility model should be included in the scope of the patent application of the utility model.

[0041] Finally, it should be noted that: the above embodiments are only specific implementation manners of the utility model, used to illustrate the technical solutions of the utility model, rather than limiting it. The protection scope of the utility model is not limited thereto. Although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: any person skilled in the art within the technical scope disclosed by the utility model can still modify the technical solutions described in the foregoing embodiments or can easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes, or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model, and should all be covered by the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A square lithium battery formation waste liquid collection and pipeline cleaning system, the top surface of the square lithium battery has a liquid injection hole, characterized in that: The square lithium battery formation waste liquid collection and pipeline cleaning system comprises: A first manifold, each of which is connected to a plurality of suction tubes, and each of which has a suction nozzle at the end thereof for matching with the injection hole; A gas-liquid separator is used to separate waste gas and waste liquid. The gas-liquid separator has an inlet for connecting to the first manifold. The gas-liquid separator also has an exhaust port for exhausting waste gas and a first drain port for exhausting waste liquid. The first drain port is connected to a collection cup. A second drain port is provided at the bottom of the collection cup. A second manifold, each of which is used to merge waste liquid separated by a plurality of gas-liquid separators, the second liquid discharge port on the collecting cup corresponding to each gas-liquid separator is connected to the second manifold, and an electric valve for controlling liquid discharge is provided at the second liquid discharge port; The collecting tank is used to collect the waste liquid from each second manifold.

2. The square lithium battery formation waste liquid collection and pipeline cleaning system according to claim 1 is characterized in that: It also includes a confluence main pipe, each second confluence main pipe is connected to the confluence main pipe, the confluence main pipe is connected to the collection tank, and the confluence main pipe is also provided with a diaphragm pump for driving waste liquid into the collection tank.

3. The square lithium battery formation waste liquid collection and pipeline cleaning system according to claim 2 is characterized in that: One end of the confluence main pipe is connected to the collection tank, and the other end is used as a cleaning liquid inlet, and the cleaning liquid inlet is provided with a first cleaning valve that controls the opening and closing of the cleaning liquid inlet.

4. The square lithium battery formation waste liquid collection and pipeline cleaning system according to claim 3 is characterized in that: One end of the converging main pipe serving as a cleaning liquid inlet is bent upward, and the cleaning liquid inlet is provided with a funnel for pouring cleaning liquid.

5. The square lithium battery formation waste liquid collection and pipeline cleaning system according to claim 1 is characterized in that: The collecting tank is provided with a liquid level sensor, and a drain valve is arranged at the bottom of the collecting tank.

6. The square lithium battery formation waste liquid collection and pipeline cleaning system according to claim 1, characterized in that: The first manifold is further provided with a cleaning branch at one end connected to the gas-liquid separator and the second drain port is connected to one end of the second manifold, and the cleaning branch is provided with a second cleaning valve. The first manifold is provided with a third cleaning valve at a section between the section connected to the gas-liquid separator and the section connected to the cleaning branch.

7. The square lithium battery formation waste liquid collection and pipeline cleaning system according to claim 6, characterized in that: It also includes a cleaning liquid tank, on which a pressing plate is provided, and the top surface of the pressing plate is provided with liquid suction holes, and the number of liquid suction holes on the top surface of each pressing plate is the same as the number of suction nozzles corresponding to one of the first manifolds and corresponds one to one, The pressing plate is also provided with a suction pipe with one end connected to the suction hole and the other end connected to the bottom of the cleaning liquid tank, and each suction hole is correspondingly provided with a suction pipe.

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