An integrated ultrasonic-assisted square aluminum shell lithium battery liquid injection device

Abstract

The utility model discloses square aluminium shell lithium cell liquid injection device of integrated ultrasonic wave auxiliary belongs to lithium battery manufacturing technical field, including support, the inside installation of support has the liquid injection sleeve cup, the liquid injection sleeve cup is connected with the liquid supply pipeline, the bottom of liquid injection sleeve cup is provided with the liquid injection mouth, install ultrasonic transducer on the liquid injection sleeve cup, cooperate and use through the ultrasonic generator and ultrasonic transducer of setting, can produce 20 40kHz frequency ultrasonic wave and act on the electrolyte in the liquid injection sleeve cup, by this can reduce electrolyte viscosity greatly, promote the penetration rate, reduce the production line waiting time, shorten production cycle, and, still can avoid local electrolyte penetration not sufficient, guarantee the electrolyte infiltration effect of each battery consistent, be favorable to keep product quality stable, and ultrasonic wave effect adopts non - contact type design, through transducer and conduct energy to electrolyte, need not direct contact battery electrode or shell, can effectively avoid electrode structure.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery manufacturing technology, specifically to an ultrasonic-assisted square aluminum-cased lithium battery electrolyte injection device. Background Technology

[0002] In the lithium battery production process, the electrolyte injection operation is a critical step affecting battery performance and production efficiency. Its core objective is to ensure that the electrolyte can fully wet the electrode materials, thereby guaranteeing the battery's charge-discharge performance, cycle life, and safety.

[0003] Currently, the commonly used electrolyte injection method is pressure injection, which involves injecting electrolyte into the battery under pressure. However, this process has certain limitations: after pressure injection, the battery usually needs to be left to stand for a long time (generally no less than 12 hours) to ensure that the electrolyte is fully saturated. This results in a large area occupied by the standing station on the production line, limiting the production cycle (the traditional cycle is about 3-5 minutes per cell). In addition, the high viscosity of the electrolyte leads to a low penetration rate, which in turn affects product quality. Therefore, technical improvements are needed.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide an integrated ultrasonic-assisted square aluminum-shell lithium battery electrolyte injection device, which can reduce the viscosity of the electrolyte, shorten the electrolyte injection settling time, increase the electrolyte injection production cycle, and improve the electrolyte conductivity.

[0006] To solve the above technical problems, the present invention adopts the following technical solution: an integrated ultrasonic-assisted square aluminum-shell lithium battery liquid injection device, including a bracket, an injection cup installed inside the bracket, a liquid supply pipe connected to the injection cup, an injection port provided at the bottom of the injection cup, an ultrasonic transducer installed on the injection cup, an ultrasonic generator installed on the bracket, and the output end of the ultrasonic generator connected to the ultrasonic transducer.

[0007] Preferably, a cylinder is fixedly connected to the inner top wall of the bracket, and the bottom end of the cylinder is fixedly connected to the injection cup for driving the injection cup to rise and fall.

[0008] Preferably, the output end of the ultrasonic generator is fixedly connected to a conveying pipe, the other end of the conveying pipe is connected to a flexible pipe, and the other end of the flexible pipe is connected to the output end of the ultrasonic transducer.

[0009] Preferably, multiple ultrasonic transducers are provided, and the ultrasonic transducers are arranged in a ring array on the side wall of the liquid injection cup, and the multiple ultrasonic transducers are connected to each other through arc-shaped pipes.

[0010] Preferably, the bracket has an internal platform on which a pressure sensor and an ultrasonic level gauge are mounted respectively.

[0011] Preferably, a lithium battery body is placed above the placement platform, and the upper surface of the lithium battery body is provided with an inlet corresponding to the liquid injection port.

[0012] Preferably, the injection cup has a plug ball inside for sealing the injection port, and the bottom of the injection cup has multiple through holes. Each through hole is slidably connected to a push rod. The bottom end of each push rod extends to the bottom of the injection cup, and the top end of each push rod contacts the plug ball.

[0013] Preferably, a horizontal plate is fixedly connected inside the injection cup, a spring is fixedly connected to the bottom surface of the horizontal plate, and the bottom end of the spring is fixedly connected to the ball stopper.

[0014] Preferably, the horizontal plate has a sliding hole, and a guide rod is slidably connected inside the sliding hole. The bottom end of the guide rod is fixedly connected to the ball stopper, and the guide rod is located inside the spring.

[0015] Preferably, the bottom end of the injection cup is threaded with a sealing head.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] By using an ultrasonic generator and transducer in conjunction, ultrasonic waves with a frequency of 20-40kHz can be generated and applied to the electrolyte in the injection cup. This significantly reduces the electrolyte viscosity, increases the penetration rate, reduces production line waiting time, and shortens the production cycle. Furthermore, it avoids insufficient localized electrolyte penetration, ensuring consistent electrolyte wetting for each battery and contributing to stable product quality. The ultrasonic action employs a non-contact design, transmitting energy to the electrolyte through the transducer without direct contact with the battery electrodes or casing, effectively avoiding electrode structural issues. A cylinder drives the injection cup to move flexibly up and down. The combination of a plug and a push rod inside the injection cup automatically seals the injection port during use, preventing premature electrolyte dripping. During injection, as the cup is pressed down, the push rod, compressed by the battery body, opens the plug, achieving precise liquid control and preventing electrolyte waste or contamination of the battery surface. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a perspective view of the ultrasonic-assisted square aluminum-shell lithium battery liquid injection device of this utility model.

[0020] Figure 2 This is a perspective view of the support in the ultrasonic-assisted square aluminum-shell lithium battery injection device of this utility model.

[0021] Figure 3 This is a side view of the support in the ultrasonic-assisted square aluminum-shell lithium battery injection device of this utility model.

[0022] Figure 4 This is a perspective view of the liquid injection cup in the ultrasonic-assisted square aluminum-shell lithium battery liquid injection device of this utility model.

[0023] Figure 5 This is a cross-sectional view of the liquid injection cup in the ultrasonic-assisted square aluminum-shell lithium battery liquid injection device of this utility model.

[0024] Figure 6 This is a three-dimensional view of the ball-blocking device in the ultrasonic-assisted square aluminum-shell lithium battery injection device of this utility model.

[0025] Figure 7 This is a perspective view of the sealing head in the ultrasonic-assisted square aluminum-shell lithium battery liquid injection device of this utility model.

[0026] In the diagram: 1. Support; 2. Injection cup; 3. Lithium battery body; 4. Placement platform; 5. Pressure sensor; 6. Ultrasonic level gauge; 7. Liquid supply pipe; 8. Ultrasonic generator; 9. Delivery pipe; 10. Flexible pipe; 11. Ultrasonic transducer; 12. Arc-shaped pipe; 13. Cylinder; 14. Injection port; 15. Liquid inlet; 16. Horizontal plate; 17. Spring; 18. Blocking ball; 19. Guide rod; 20. Top rod; 21. Sealing head. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0028] like Figure 1-7 As shown, this utility model provides an integrated ultrasonic-assisted square aluminum-shell lithium battery electrolyte filling device, including a support 1. An electrolyte filling cup 2 is installed inside the support 1. A cylinder 13 is fixedly connected to the inner top wall of the support 1, and the bottom end of the cylinder 13 is fixedly connected to the electrolyte filling cup 2 for driving the liquid filling cup 2 to rise and fall. A liquid supply pipe 7 is connected to the liquid filling cup 2, and an electrolyte filling port 14 is provided at the bottom of the liquid filling cup 2. The cylinder 13 controls the rising and falling of the liquid filling cup 2, realizing the automation of the electrolyte filling process. By connecting to an external liquid supply device through the liquid supply pipe 7, the electrolyte can be pressurized and delivered into the electrolyte filling cup 2, providing a stable liquid source for battery electrolyte filling.

[0029] An ultrasonic transducer 11 is installed on the injection cup 2, and an ultrasonic generator 8 is installed on the bracket 1. The output end of the ultrasonic generator 8 is connected to the ultrasonic transducer 11. The output end of the ultrasonic generator 8 is fixedly connected to a delivery pipe 9, and the other end of the delivery pipe 9 is connected to a flexible pipe 10. The other end of the flexible pipe 10 is connected to the output end of the ultrasonic transducer 11. The ultrasonic generator 8 and the ultrasonic transducer 11 can be connected by the delivery pipe 9 and the flexible pipe 10. By using their cooperation, ultrasonic waves can be generated and transmitted into the injection cup 2 to treat the electrolyte inside, reduce the viscosity of the electrolyte, and shorten the injection settling time.

[0030] Furthermore, multiple ultrasonic transducers 11 are provided, arranged in a ring array on the side wall of the injection cup 2, and connected to each other via arc-shaped pipes 12. This ensures uniform distribution of ultrasonic waves in the electrolyte, avoids dead zones in the sound field, and thus improves the uniformity and overall efficiency of ultrasonic treatment.

[0031] In this embodiment, a placement platform 4 is provided inside the support 1, and a pressure sensor 5 and an ultrasonic level gauge 6 are respectively installed on the placement platform 4. The lithium battery body 3 is placed on top of the placement platform 4, and the upper end surface of the lithium battery body 3 is provided with a liquid inlet 15 corresponding to the injection port 14. The pressure sensor 5 can monitor the pressure changes generated during the injection process, and the ultrasonic level gauge 6 can detect the electrolyte level in real time. By using them together, precise control and status feedback of the injection process can be achieved, ensuring accurate injection volume and process stability.

[0032] The injection cup 2 has a plug ball 18 inside for sealing the injection port 14. Multiple through holes are opened at the bottom of the injection cup 2, and a push rod 20 is slidably connected inside each through hole. The bottom end of each push rod 20 extends to the bottom of the injection cup 2, and the top end of each push rod 20 contacts the plug ball 18. The plug ball 18 and push rod 20 work together to automatically open the injection port 14 when the injection cup 2 descends and contacts the inlet 15, and automatically seal the injection port 14 under gravity when the injection cup 2 rises, preventing electrolyte leakage.

[0033] The injection cup 2 is internally fixedly connected to a horizontal plate 16, and a spring 17 is fixedly connected to the bottom surface of the horizontal plate 16. The bottom end of the spring 17 is fixedly connected to the plug ball 18. A sliding hole is provided on the horizontal plate 16, and a guide rod 19 is slidably connected inside the sliding hole. The bottom end of the guide rod 19 is fixedly connected to the plug ball 18, and the guide rod 19 is located inside the spring 17. The spring 17 applies pressure to the plug ball 18, thereby ensuring that the injection port 14 remains sealed when not injecting liquid; the guide rod 19 guides the movement of the plug ball 18, preventing deflection and ensuring reliable sealing during use.

[0034] The bottom end of the liquid filling cup 2 is threaded with a sealing head 21. The sealing head 21 is threaded for easy disassembly and maintenance, while ensuring the sealing performance of the liquid filling cup 2 during use, and can adapt to the liquid filling requirements of batteries of different specifications.

[0035] Working principle: During use, the lithium battery body 3 to be injected can be placed on the placement platform 4. Then, the injection cup 2 is driven downward by the cylinder 13, so that the injection port 14 at its bottom contacts and connects with the liquid inlet 15 on the lithium battery body 3. Then, the liquid supply pipe 7 can deliver electrolyte into the injection cup 2 to perform the injection operation. During the injection process, the ultrasonic generator 8, the delivery pipe 9, the flexible pipe 10, and the ultrasonic transducer 11 can generate ultrasonic waves with a frequency of 20-40kHz, which are then transmitted into the injection cup 2. In the electrolyte, the cavitation effect and mechanical disturbance generated by the propagation of ultrasound in the liquid can effectively reduce the viscosity of the electrolyte and improve its fluidity and permeability, thereby promoting the rapid entry of the electrolyte into the pores of the electrode plates and separator inside the battery cell. At the same time, the pressure sensor 5 and the ultrasonic level sensor 6 on the placement platform 4 can monitor the liquid injection status in real time, and the feedback signal is used to dynamically adjust the ultrasonic power. After the liquid injection is completed, the liquid injection cup 2 is lifted by the cylinder 13 and detached from the battery. The plug ball 18 inside it can automatically seal the liquid injection port 14 when it rises to prevent electrolyte leakage.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A square aluminum-cased lithium battery electrolyte filling device integrated with ultrasonic assistance, characterized in that, The device includes a support frame, an injection cup installed inside the support frame, a liquid supply pipe connected to the injection cup, an injection port at the bottom of the injection cup, an ultrasonic transducer installed on the injection cup, and an ultrasonic generator installed on the support frame. The output end of the ultrasonic generator is connected to the ultrasonic transducer.

2. The integrated ultrasonic-assisted square aluminum-cased lithium battery electrolyte filling device as described in claim 1, characterized in that, A cylinder is fixedly connected to the inner top wall of the bracket, and the bottom end of the cylinder is fixedly connected to the injection cup for driving the injection cup to rise and fall.

3. The integrated ultrasonic-assisted square aluminum-cased lithium battery electrolyte filling device as described in claim 2, characterized in that, The output end of the ultrasonic generator is fixedly connected to a conveying pipe, and the other end of the conveying pipe is connected to a flexible pipe, the other end of which is connected to the output end of the ultrasonic transducer.

4. The integrated ultrasonic-assisted square aluminum-cased lithium battery electrolyte filling device as described in claim 3, characterized in that, Multiple ultrasonic transducers are provided, and the ultrasonic transducers are arranged in a ring array on the side wall of the liquid injection cup. The multiple ultrasonic transducers are connected to each other through arc-shaped pipes.

5. The integrated ultrasonic-assisted square aluminum-cased lithium battery electrolyte filling device as described in claim 1, characterized in that, The bracket has an internal platform on which a pressure sensor and an ultrasonic level gauge are mounted.

6. The integrated ultrasonic-assisted square aluminum-cased lithium battery electrolyte filling device as described in claim 5, characterized in that, A lithium battery body is placed on top of the placement platform, and an inlet corresponding to the liquid injection port is provided on the upper surface of the lithium battery body.

7. The integrated ultrasonic-assisted square aluminum-cased lithium battery electrolyte filling device as described in claim 1, characterized in that, The injection cup has a plug ball inside for sealing the injection port. The bottom of the injection cup has multiple through holes, and a push rod is slidably connected inside each through hole. The bottom end of each push rod extends to the bottom of the injection cup, and the top end of each push rod contacts the plug ball.

8. The integrated ultrasonic-assisted square aluminum-cased lithium battery electrolyte filling device as described in claim 7, characterized in that, A horizontal plate is fixedly connected inside the injection cup, and a spring is fixedly connected to the bottom surface of the horizontal plate. The bottom end of the spring is fixedly connected to the ball stopper.

9. The integrated ultrasonic-assisted square aluminum-cased lithium battery electrolyte filling device as described in claim 8, characterized in that, The horizontal plate has a sliding hole, and a guide rod is slidably connected inside the sliding hole. The bottom end of the guide rod is fixedly connected to the ball stopper, and the guide rod is located inside the spring.

10. The integrated ultrasonic-assisted square aluminum-cased lithium battery electrolyte filling device as described in claim 1, characterized in that, The bottom end of the injection sleeve is threaded with a sealing head.

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