Solid-state battery in-situ mixing device

Abstract

The utility model relates to the technical field of solid-state batteries, and discloses a solid-state battery in-situ mixing device which comprises an equipment cabinet and a workbench, a hollow fixing shaft is arranged on the outer side of a square shaft, a vibration table is fixed to the top end of the hollow fixing shaft, a vibration motor is arranged in the center of the bottom of the vibration table, and a solid-state battery cell clamp is arranged at the top end of the vibration table. According to the utility model, the hollow fixed shaft is driven to rotate through the connection of the square shaft and the hollow fixed shaft, so that the vibration table and the solid-state battery cell clamp rotate together, and the grouted battery is subjected to rotary mixing; the common poor appearance of a soft package solid-state battery can be solved, uniform curing between battery pole pieces can be realized, the uniformity of a battery interface is improved, the hardness and key performance of the battery are improved, the bottleneck problems of packaging, liquid leakage and the like of a traditional liquid-state battery can be solved, and the quality and yield of the battery are improved.

Description

Technical Field

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

[0002] As lithium-ion batteries have been widely used in various fields due to their many advantages in recent years, safety issues exposed under various adverse working conditions have become increasingly apparent.

[0003] Solid-state batteries do not contain any low-flash-point, flammable or explosive organic solvents, which can fundamentally solve the safety hazards of liquid batteries. At the same time, they can be well adapted to lithium metal negative electrodes to achieve higher energy density, making them a widely recognized next-generation battery technology.

[0004] Currently, solid-state batteries are primarily categorized by electrolyte type, including polymer solid-state batteries, oxide solid-state batteries, and sulfide solid-state batteries. Polymer solid-state batteries are formed by adding liquid monomer A and initiator B, allowing them to sit and soak for a period of time before polymerizing at high temperatures to form a solid-state battery without liquid.

[0005] Currently, the injection of in-situ polymerization solid-state battery electrolyte involves two liquids: monomer and initiator. They need to be evenly mixed during injection and then high-temperature in-situ polymerization is achieved.

[0006] Currently, electrode wetting is primarily achieved through the fluidity of the liquid electrolyte itself, the van der Waals force between the electrode and the electrolyte, and the capillary diffusion tension of molecules or ions. This is because, considering existing monomer concentration gradient verification, if high performance is desired and the added monomer concentration is high, the viscosity is high, and the liquid fluidity is poor, it is difficult to achieve uniform mixing by simply relying on the diffusion and flow of solvent molecules while standing. This can result in areas with excessive or insufficient amounts of monomer and initiator, leading to uneven and wrinkled appearance of the battery cell during high-temperature in-situ polymerization, as well as difficulty in achieving optimal electrical and safety performance, and premature cell failure. Utility Model Content

[0007] The purpose of the present invention is to provide a solid-state battery in-situ mixing device to solve the problems raised in the above background technology.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a solid-state battery in-situ mixing device, comprising: an equipment cabinet and a workbench, a workbench is provided at the top of the equipment cabinet, a bottom shaft is rotatably provided in the center of the workbench, a square shaft is fixed on the top of the bottom shaft, a hollow fixed shaft is provided on the outside of the square shaft, the top of the hollow fixed shaft is fixed to a vibration table, a vibration motor is provided in the center of the bottom of the vibration table, a solid-state battery cell clamp is provided on the top of the vibration table, a spring is provided on the outside of the hollow fixed shaft, and the bottom end of the spring is connected to the outer wall of the bottom shaft.

[0009] Furthermore, an upper flange is fixed to the middle outer wall of the hollow fixed shaft, a lower flange is fixed to the middle outer wall of the bottom shaft, the top end of the spring is fixedly connected to the upper flange, and the bottom end of the spring is fixedly connected to the lower flange.

[0010] Furthermore, a telescopic cover is provided between the outer walls of the upper flange and the lower flange.

[0011] Furthermore, a through hole matching with the square shaft is provided at the center of the bottom end of the hollow fixed shaft, and the square shaft and the through hole at the bottom end of the hollow fixed shaft are in transition fit.

[0012] Furthermore, a heat dissipation hole is opened at the top of the hollow fixed shaft, and the heat dissipation holes are distributed on the outside of the vibration motor. A servo motor is fixed inside the equipment cabinet, and the top of the servo motor output shaft is fixedly connected to the bottom shaft.

[0013] Furthermore, a plurality of solid-state battery cell fixtures are provided, and the plurality of solid-state battery cell fixtures are evenly distributed circumferentially on the top of the vibration table.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The utility model realizes that when the solid-state battery in-situ mixing device is used, the batteries to be injected with electrolyte are placed in the solid-state battery cell clamp in sequence and fixed, and then the monomer and initiator electrolytes are injected into the batteries at the same time. After the batteries are left to stand for a period of time and vacuum is started, the servo motor and the vibration motor are started, and the vibration table is driven to vibrate by the vibration motor to vibrate and mix the batteries in the solid-state battery cell clamp. The bottom shaft is driven to rotate by the servo motor, and the bottom shaft is fixedly connected to the square shaft so that the square shaft rotates with the bottom shaft. Then, the hollow fixed shaft is driven to rotate by the connection between the square shaft and the hollow fixed shaft, so that the vibration table and the solid-state battery cell clamp are rotated together to rotate and mix the batteries after slurry injection. The common problems of wrinkling, blistering, uneven convexity and poor appearance of aluminum-plastic film of soft-pack solid-state batteries can be solved, uniform curing between battery pole pieces can be achieved, the uniformity of battery interface can be improved, the hardness and key performance of the battery can be improved, the bottleneck problems of traditional liquid battery packaging and leakage can be solved, and the battery quality and yield can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional diagram of an in-situ mixing device for solid-state batteries according to the present invention;

[0017] Figure 2 This is a main cross-sectional view of a solid-state battery in-situ mixing device according to the present invention;

[0018] Figure 3This is a schematic diagram of the hollow fixed shaft connection structure of a solid-state battery in-situ mixing device of the present utility model;

[0019] Figure 4 This is a front view of a solid-state battery in-situ mixing device according to the present invention.

[0020] In the figure: 1. Equipment cabinet; 2. Workbench; 3. Telescopic cover; 4. Vibration table; 5. Solid-state battery cell fixture; 6. Vibration motor; 7. Hollow fixed shaft; 8. Square shaft; 9. Bottom shaft; 10. Servo motor; 11. Spring; 12. Upper flange; 13. Lower flange. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] See also Figures 1-4 The utility model provides a technical solution: a solid-state battery in-situ mixing device, including an equipment cabinet 1 and a workbench 2. The equipment cabinet 1 is provided with a workbench 2 on the top. The workbench 2 is provided with a bottom shaft 9 in the center of the rotation. A square shaft 8 is fixed on the top of the bottom shaft 9. A hollow fixed shaft 7 is provided on the outside of the square shaft 8. The top of the hollow fixed shaft 7 is fixed to a vibration table 4. A vibration motor 6 is provided in the center of the bottom of the vibration table 4. A solid-state battery cell clamp 5 is provided on the top of the vibration table 4. A spring 11 is provided on the outside of the hollow fixed shaft 7. The bottom end of the spring 11 is connected to the outer wall of the bottom shaft 9. The vibration table 4 is driven to vibrate by the vibration motor 6 to vibrate and mix the batteries in the solid-state battery cell fixture 5. The bottom shaft 9 is driven to rotate by the servo motor 10. The bottom shaft 9 is fixedly connected to the square shaft 8 so that the square shaft 8 rotates along with the bottom shaft 9. Then, the hollow fixed shaft 7 is driven to rotate by the connection between the square shaft 8 and the hollow fixed shaft 7, so that the vibration table 4 and the solid-state battery cell fixture 5 rotate together to rotate and mix the batteries after grouting. This can solve the common problems of wrinkles, bubbles, unevenness and poor appearance of the aluminum-plastic film of soft-pack solid-state batteries, achieve uniform solidification between battery pole pieces, improve the uniformity of the battery interface, improve the hardness and key performance of the battery, solve the bottleneck problems of traditional liquid battery packaging and leakage, and improve the quality and yield of the battery.

[0023] An upper flange 12 is fixed to the middle outer wall of the hollow fixed shaft 7 , a lower flange 13 is fixed to the middle outer wall of the bottom shaft 9 , the top end of the spring 11 is fixedly connected to the upper flange 12 , and the bottom end of the spring 11 is fixedly connected to the lower flange 13 .

[0024] A telescopic cover 3 is provided between the outer walls of the upper flange 12 and the lower flange 13 for protecting the spring 11 .

[0025] A through hole is formed at the center of the bottom end of the hollow fixed shaft 7 to mate with the square shaft 8. The square shaft 8 and the through hole at the bottom end of the hollow fixed shaft 7 form a transition fit. During rotation, the connection between the hollow fixed shaft 7 and the square shaft 8, combined with the elastic force of the spring 11, can provide up and down buffering for the vibration of the vibration table 4.

[0026] The top of the hollow fixed shaft 7 is provided with heat dissipation holes, which are distributed on the outside of the vibration motor 6 for heat dissipation of the vibration motor 6. A servo motor 10 is fixed inside the equipment cabinet 1, and the top of the output shaft of the servo motor 10 is fixedly connected to the bottom shaft 9. The servo motor 10 drives the bottom shaft 9 to rotate. The fixed connection between the bottom shaft 9 and the square shaft 8 causes the square shaft 8 to rotate along with the bottom shaft 9. Then, the connection between the square shaft 8 and the hollow fixed shaft 7 drives the hollow fixed shaft 7 to rotate, thereby causing the vibration table 4 and the solid-state battery cell fixture 5 to rotate together, rotating and mixing the batteries after grouting.

[0027] There are several solid-state battery cell clamps 5, which are evenly distributed circumferentially on the top of the vibration table 4 and are used for simultaneous rotation and vibration mixing of multiple batteries. The data of the solid-state battery cell clamps 5 can be personalized according to the production capacity of each company, and 3-20 are acceptable.

[0028] When the solid-state battery in-situ mixing device is used, the batteries to be injected with electrolyte are placed in the solid-state battery cell fixture 5 in turn for fixation, and then the monomer and initiator electrolytes are injected into the battery at the same time. After standing for a period of time, vacuuming is started, and then the servo motor 10 and the vibration motor 6 are started. The vibration table 4 is driven to vibrate by the vibration motor 6 to vibrate the batteries in the solid-state battery cell fixture 5. The bottom shaft 9 is driven to rotate by the servo motor 10. The bottom shaft 9 is fixedly connected to the square shaft 8 so that the square shaft 8 rotates with the bottom shaft 9. Then, the hollow fixed shaft 7 is driven to rotate by the connection between the square shaft 8 and the hollow fixed shaft 7, so that the vibration table 4 and the solid-state battery cell fixture 5 are rotated together to rotate the batteries after slurrying. This can solve the common problems of wrinkles, bubbles, unevenness and poor appearance of the aluminum-plastic film of soft-pack solid-state batteries, achieve uniform solidification between battery pole pieces, improve the uniformity of the battery interface, improve the hardness and key performance of the battery, solve the bottleneck problems of traditional liquid battery packaging and leakage, and improve the battery quality and yield.

[0029] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

Claims

1. A solid-state battery in-situ mixing device, comprising: An equipment cabinet (1) and a workbench (2), characterized in that: a workbench (2) is provided at the top of the equipment cabinet (1), a bottom shaft (9) is provided in the center of the workbench (2), a square shaft (8) is fixed on the top of the bottom shaft (9), a hollow fixed shaft (7) is provided on the outside of the square shaft (8), the top of the hollow fixed shaft (7) is fixed to a vibration table (4), a vibration motor (6) is provided at the center of the bottom of the vibration table (4), a solid-state battery cell fixture (5) is provided on the top of the vibration table (4), a spring (11) is provided on the outside of the hollow fixed shaft (7), and the bottom end of the spring (11) is connected to the outer wall of the bottom shaft (9).

2. The solid-state battery in-situ mixing device according to claim 1, characterized in that: An upper flange (12) is fixed to the middle outer wall of the hollow fixed shaft (7), a lower flange (13) is fixed to the middle outer wall of the bottom shaft (9), the top end of the spring (11) is fixedly connected to the upper flange (12), and the bottom end of the spring (11) is fixedly connected to the lower flange (13).

3. The solid-state battery in-situ mixing device according to claim 2, characterized in that: A telescopic cover (3) is provided between the outer walls of the upper flange (12) and the lower flange (13).

4. The solid-state battery in-situ mixing device according to claim 2, characterized in that: A through hole matching the square shaft (8) is provided at the center of the bottom end of the hollow fixed shaft (7), and the square shaft (8) and the bottom through hole of the hollow fixed shaft (7) are in transitional fit.

5. The solid-state battery in-situ mixing device according to claim 4, characterized in that: The top of the hollow fixed shaft (7) is provided with heat dissipation holes, which are distributed outside the vibration motor (6). A servo motor (10) is fixed inside the equipment cabinet (1), and the top of the output shaft of the servo motor (10) is fixedly connected to the bottom shaft (9).

6. The solid-state battery in-situ mixing device according to claim 1, characterized in that: A plurality of solid-state battery cell clamps (5) are provided, and the plurality of solid-state battery cell clamps (5) are evenly distributed in the circumferential direction on the top of the vibration table (4).

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