Electrolyte feeding device for in-situ solid-state battery

Abstract

The utility model relates to the technical field of solid-state batteries, and discloses an electrolyte feeding device for an in-situ solid-state battery, which comprises a rack and a stirring tank, the stirring tank is arranged in the center of the top of the rack, a sealing cover is arranged at the top of the stirring tank, stirring feeding pipes are arranged on two sides of the top of the sealing cover, and condenser pipes are arranged at the top ends of the stirring feeding pipes. The liquid electrolyte feeding device comprises a condenser pipe, a feeding hopper is arranged at the top end of the condenser pipe, a main feeding pipe is arranged at the top end of the feeding hopper, and the condenser pipe comprises an inner pipe and an outer pipe. The two stirring feeding pipes are used for feeding at the same time, complete curing can be achieved, the curing effect is consistent, and the curing degree is controllable.

Description

Technical Field

[0001] The utility model relates to the technical field of solid-state batteries, in particular to an electrolyte feeding device for in-situ solid-state batteries. Background Technique

[0002] Lithium-ion batteries have been widely used in many aspects of the national economy such as electric vehicles, mobile intelligent devices, large-scale energy storage, etc., and are gradually moving into special application fields such as deep sea, deep space, deep earth, and individual combat equipment. However, lithium batteries using traditional carbonate liquid electrolytes generally have potential safety hazards such as easy leakage, easy combustion, and easy explosion.

[0003] The high interfacial impedance and low ionic conductivity of solid oxide electrolytes limit their practical applications. Gel polymer electrolytes can seek a balance between liquid electrolytes and solid electrolytes. It is a semi-solid electrolyte composed of a polymer matrix and a liquid electrolyte. The polymer matrix maintains the mechanical properties of the electrolyte membrane, and the liquid solvent and lithium salt are filled in the pores of the polymer, thus greatly overcoming the leakage problem of liquid electrolytes and improving the high interfacial impedance between the solid electrolyte and the electrode.

[0004] In-situ polymerization is a process in which monomers and initiators are dissolved in a liquid electrolyte to form a precursor solution, then the precursor solution is injected into the battery, and finally a gel electrolyte is obtained under the initiation of heat, light, electron beam, etc. In-situ preparation greatly enhances the interfacial contact between the electrolyte and the electrode, and realizes the effective transport of lithium ions inside the porous electrode.

[0005] The existing liquid electrolyte feeding device is a single-pipeline transportation, which cannot meet the requirements of pipeline transportation feeding and polymerization of gel electrolyte monomers and initiators. Therefore, an electrolyte feeding device for in-situ solid-state batteries is provided. Summary of the Utility Model

[0006] The purpose of the utility model is to provide an electrolyte feeding device for in-situ solid-state batteries to solve the problems put forward in the above background technique.

[0007] To achieve the above purpose, the utility model provides the following technical scheme: An electrolyte feeding device for in-situ solid-state batteries, including: a frame and a stirring tank. A stirring tank is provided in the center of the top of the frame. A sealing cover is provided on the top of the stirring tank. Stirring feeding pipes are provided on both sides of the top of the sealing cover. A condensing pipe is provided at the top end of the stirring feeding pipe. A feeding hopper is provided at the top end of the condensing pipe. A main feeding pipe is provided at the top end of the feeding hopper. The condensing pipe includes an inner pipe and an outer pipe. There is a gap between the inner pipe and the outer pipe. The bottom end of the inner pipe is connected to the stirring feeding pipe. The top end of the inner pipe is connected to the feeding hopper. A stop valve and a flow control valve are provided on the stirring feeding pipe.

[0008] Further, one side of the top of the outer tube of the condenser tube is provided with a water outlet, and one side of the bottom of the outer tube of the condenser tube is provided with a water inlet.

[0009] Further, a stirring motor is provided at the center of the top of the sealing cover. The bottom end of the output shaft of the stirring motor is provided with a stirring rod, and the stirring rod is located inside the stirring tank.

[0010] Further, a connecting pipe is provided at the center of the bottom of the stirring tank, and a stop valve and a flow control valve are arranged on the connecting pipe.

[0011] Further, the bottom end of the connecting pipe is provided with a discharge hopper. A filter membrane is provided on the inner wall of the discharge hopper. A spraying pipe is provided below the filter membrane at the bottom of the discharge hopper, and a spray head is provided at the bottom of the spraying pipe.

[0012] Further, a fixed flange is provided on the outer wall of the lower half of the stirring tank. The fixed flange abuts against the top surface of the frame. A through hole is formed in the center of the frame and is located outside the stirring tank.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] By arranging the frame, the stirring tank and the feed hopper, the present utility model realizes that when the electrolyte feeding device for in-situ solidification battery is used, the polymer monomer and the initiator for in-situ solidification are respectively injected into the two feed hoppers through the two main feed pipes. The water outlet and the water inlet of the condenser tube are opened, so that the condensed water flowing in the circulation pipeline ensures that the temperature in the stirring feed pipe is lower than 30°C. Then, the stop valve is opened, and the polymer monomer and the initiator adjust the flow rates of the polymer monomer and the initiator through the flow control valve, and introduce the two substances into the stirring tank according to a specific ratio, solving the problem that the existing liquid electrolyte feeding device uses a single pipeline for transportation, which cannot meet the requirements of pipeline transportation, feeding and solidification of the gel electrolyte monomer and the initiator; simultaneous feeding of the two stirring feed pipes can achieve complete curing, consistent curing effect and controllable curing degree; effectively control the in-situ polymerization process of the electrolyte without affecting the encapsulation of the battery core; the cloth is uniform, the feeding speed is easy to control, the automation degree is high, the production efficiency is high, the cost is low, and it can be mass-produced and applied on a large scale. Description of the Drawings

[0015] Figure 1 It is a perspective view of the electrolyte feeding device for in-situ solidification battery of the present utility model;

[0016] Figure 2 It is a perspective view of another angle of the electrolyte feeding device for in-situ solidification battery of the present utility model;

[0017] Figure 3 It is a main sectional view of the electrolyte feeding device for in-situ solidification battery of the present utility model;

[0018] Figure 4 This is the front view of the electrolyte feeding device for the in-situ solidified battery of the present utility model.

[0019] In the figure: 1, frame; 2, fixed flange; 3, stirring tank; 4, sealing cover; 5, stirring feed pipe; 6, temperature sensor; 7, condensing pipe; 8, feed hopper; 9, main feed pipe, 10, water outlet; 11, water inlet; 12, connecting pipe; 13, discharge hopper; 14, spraying pipe; 15, spraying head; 16, stirring rod; 17, stirring motor; 18, filter membrane. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0021] Please refer to Figures 1-4 , the present utility model provides a technical solution: an electrolyte feeding device for an in-situ solidified battery, including: a frame 1 and a stirring tank 3. A stirring tank 3 is provided in the center of the top of the frame 1. A sealing cover 4 is provided on the top of the stirring tank 3. Stirring feed pipes 5 are provided on both sides of the top of the sealing cover 4. A condensing pipe 7 is provided at the top of the stirring feed pipe 5. A feed hopper 8 is provided at the top of the condensing pipe 7. A main feed pipe 9 is provided at the top of the feed hopper 8. The condensing pipe 7 includes an inner pipe and an outer pipe, and there is a gap between the inner pipe and the outer pipe. The bottom end of the inner pipe is connected to the stirring feed pipe 5, and the top end of the inner pipe is connected to the feed hopper 8. A stop valve and a flow control valve are provided on the stirring feed pipe 5.

[0022] A water outlet 10 is provided on one side of the top of the outer pipe of the condensing pipe 7, and a water inlet 11 is provided on one side of the bottom of the outer pipe of the condensing pipe 7. Open the water outlet 10 and the water inlet 11 of the condensing pipe 7 to circulate the condensed water between the inner pipe and the outer pipe. The condensed water is pumped and circulated by a circulating water pump to ensure that the temperature in the stirring feed pipe 5 is lower than 30 °C.

[0023] A stirring motor 17 is provided in the center of the top of the sealing cover 4. The bottom end of the output shaft of the stirring motor 17 is fixed with a stirring rod 16, and the stirring rod 16 is located inside the stirring tank 3. The stirring rod 16 is rotated by the stirring motor 17 to stir the materials in the stirring tank 3.

[0024] A connecting pipe 12 is provided in the center of the bottom of the stirring tank 3, and a stop valve and a flow control valve are provided on the connecting pipe 12. It is used to control the flow rate and the opening and closing of the feeding of the polymer monomer and the initiator.

[0025] The bottom end of the connecting pipe 12 is provided with a discharge hopper 13. The inner wall of the discharge hopper 13 is provided with a filter membrane 18. Below the filter membrane 18 at the bottom of the discharge hopper 13, there is a spray pipe 14, and at the bottom of the spray pipe 14, there is a spray head 15. After the polymer monomer and the initiator are fully stirred and mixed, the temperature in the mixing unit is monitored in real time by the temperature sensor 6. If the temperature is too high, the rotation speed of the stirring rod 16 is reduced. After mixing for a certain period of time, the stop valve on the connecting pipe 12 is opened, and the mixed glue liquid enters the discharge hopper 13 through the pipeline at a certain flow rate. The particle size of the glue liquid is screened by the filter membrane 18, and then the uniformly mixed gel electrolyte is sprayed onto the dry battery cell through the spray pipe 14 and the spray head 15 to achieve in-situ solidification. The spray pipe 14 is connected to a pressure pump.

[0026] On the outer wall of the lower half of the mixing tank 3, there is a fixed flange 2. The fixed flange 2 abuts against the top surface of the frame 1. A through hole is formed in the center of the frame 1 on the outside of the mixing tank 3 for placing the mixing tank 3 on the frame 1.

[0027] When the electrolyte feeding device for in-situ solidified batteries is in use, the polymer monomer and the initiator for in-situ solidification are respectively injected into the two feeding hoppers 8 through the two main feeding pipes 9. The water outlet 10 and the water inlet 11 of the condensing pipe 7 are opened, so that the condensed water flowing in the circulating pipeline ensures that the temperature in the stirring feeding pipe 5 is lower than 30°C. Then, the stop valve is opened, and the polymer monomer and the initiator adjust the flow rates of the polymer monomer and the initiator through the flow control valves, and the two substances are introduced into the mixing tank 3 in a specific ratio, solving the problems of the existing liquid electrolyte feeding device with single-pipe transportation, which cannot meet the requirements of pipeline transportation, feeding and solidification of the gel electrolyte monomer and the initiator; the simultaneous feeding of the two stirring feeding pipes 5 can achieve complete curing, consistent curing effect and controllable curing degree; effectively control the in-situ polymerization process of the electrolyte without affecting the encapsulation of the battery cell; uniform cloth, easy control of the feeding speed, high automation degree, high production efficiency, low cost, and can be mass-produced and applied on a large scale.

[0028] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Claims

1. An electrolyte feeding device for an in-situ solid-state battery, comprising: A frame (1) and a stirring tank (3), characterized in that: a stirring tank (3) is provided at the center of the top of the frame (1), a sealing cover (4) is provided at the top of the stirring tank (3), stirring feed pipes (5) are provided on both sides of the top of the sealing cover (4), a condenser (7) is provided at the top of the stirring feed pipe (5), a feed hopper (8) is provided at the top of the condenser (7), a main feed pipe (9) is provided at the top of the feed hopper (8), the condenser (7) includes an inner tube and an outer tube, there is a gap between the inner tube and the outer tube, the bottom end of the inner tube is connected to the stirring feed pipe (5), the top end of the inner tube is connected to the feed hopper (8), and the stirring feed pipe (5) is provided with a stop valve and a flow control valve.

2. The electrolyte feeding device for in-situ solid-state battery according to claim 1, characterized in that: A water outlet (10) is provided on one side of the top of the outer tube of the condenser (7), and a water inlet (11) is provided on one side of the bottom of the outer tube of the condenser (7).

3. The electrolyte feeding device for in-situ solid-state battery according to claim 1, characterized in that: A stirring motor (17) is provided at the center of the top of the sealing cover (4), a stirring rod (16) is provided at the bottom end of the output shaft of the stirring motor (17), and the stirring rod (16) is located inside the stirring tank (3).

4. The electrolyte feeding device for in-situ solid-state battery according to claim 1, characterized in that: A connecting pipe (12) is provided at the center of the bottom of the stirring tank (3), and a stop valve and a flow control valve are provided on the connecting pipe (12).

5. The electrolyte feeding device for in-situ solid-state battery according to claim 4, characterized in that: A discharge hopper (13) is provided at the bottom end of the connecting pipe (12), a filter membrane (18) is provided on the inner wall of the discharge hopper (13), a spray pipe (14) is provided at the bottom of the discharge hopper (13) below the filter membrane (18), and a spray head (15) is provided at the bottom of the spray pipe (14).

6. The electrolyte feeding device for in-situ solid-state battery according to claim 1, characterized in that: The lower outer wall of the stirring tank (3) is provided with a fixing flange (2), the fixing flange (2) is in contact with the top surface of the frame (1), and a through hole is provided in the center of the frame (1) on the outside of the stirring tank (3).

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