Power battery discharging device capable of avoiding precipitate and gas generation

Abstract

The application discloses a power battery discharging device capable of avoiding the generation of precipitates and gas, which comprises at least one discharging groove, a rotating shaft assembly and a vacuum exhaust system. The inside of the discharging groove is provided with at least one set of the rotating shaft assembly. The rotating shaft assembly has a driving end and a rotating end. The driving end is fixedly installed on the side wall of the discharging groove, and the rotating end is arranged in the inside of the discharging groove. A plurality of battery cells are detachably installed in the circumferential direction of the rotating end and synchronously rotate with the rotating end, so that the generation of precipitates can be avoided and the solubility of the electrolyte solution can be maintained. Meanwhile, the air inlet of the vacuum exhaust system is arranged in the inside of the discharging groove. The gas in the discharging groove is exhausted, so that the discharging efficiency of the discharging groove is improved without the influence of the gas.

Description

Technical Field

[0001] This invention relates to the field of waste battery recycling and processing technology, specifically to a power battery discharge device that can avoid the generation of sediment and gas. Background Technology

[0002] There are two main methods for discharging spent power batteries before recycling: physical discharge and chemical discharge. Physical discharge involves connecting the battery to an external load, where the battery is connected to a resistor, and the remaining charge is dissipated through heat release. This method is only suitable for laboratory experiments and is not feasible for large-scale discharge. Chemical discharge utilizes the positive and negative electrode metals of the battery as the cathode and anode, respectively, and consumes the residual charge in the battery through an electrolysis process in a solution. Currently, sodium chloride solution is mainly used as the electrolyte, and spent lithium-ion batteries are used as the power source. This method is simple, feasible, and widely used. However, when using existing discharge tanks to hold the electrolyte solution to discharge power batteries, a large amount of gas and a certain amount of precipitate are easily generated at the cathode and anode terminals during the discharge process. If these precipitates and gases are not cleaned in time, the discharge efficiency will be affected. In addition, the solubility of the electrolyte solution also exhibits crystallization with changes in temperature and time, which greatly reduces the discharge efficiency of the power battery. Summary of the Invention

[0003] In view of the above problems, the present invention proposes a power battery discharge device that can avoid the generation of precipitates and gases, aiming to solve the technical problem that the precipitates and gases generated at the cathode and anode of the battery cannot be cleaned in a timely and effective manner when the existing discharge tank discharges the power battery, thus affecting the discharge efficiency.

[0004] To achieve the above-mentioned technical objectives, the present invention provides a power battery discharge device that can avoid the generation of precipitates and gases. The device includes at least one discharge tank, a rotating shaft assembly, and a vacuum extraction system.

[0005] The discharge tank is equipped with at least one set of the rotating shaft assembly. The rotating shaft assembly has a driving end and a rotating end. The driving end is fixedly installed on the side wall of the discharge tank, and the rotating end is located inside the discharge tank. Multiple battery cells are detachably installed around the rotating end and rotate synchronously with the rotating end. This not only maintains the effective dissolution of the electrolyte solution, but also removes the deposits around the battery in a timely manner, thereby improving the discharge efficiency.

[0006] The air inlet of the vacuum extraction system is located inside the discharge tank to extract the gas inside the discharge tank, thereby clearing the gas from the discharge tank and improving the discharge efficiency of the discharge device.

[0007] When there are multiple discharge cells, the multiple discharge cells are connected in parallel to the vacuum extraction system.

[0008] In a preferred embodiment, the rotating shaft assembly includes a drive motor, a rotating shaft, and a plurality of clamping components. The drive motor is fixedly mounted on the side wall of the discharge tank, the rotating shaft is mounted on the power output end of the drive motor, and the plurality of clamping components are evenly arranged circumferentially along the outer wall of the rotating shaft, with the plurality of battery cells snapped into the clamping components.

[0009] In a preferred embodiment, the clamping component includes two clamping plates arranged opposite each other, the bottom of the clamping plates being fixedly disposed on the outer wall of the rotating shaft, and the gap between the two clamping plates forming a clamping portion for clamping the battery cell.

[0010] In a preferred embodiment, the clamping plate and the rotating shaft are integrally formed.

[0011] In a preferred embodiment, the vacuum extraction system includes an extraction duct, a buffer, and a vacuum pump. The air inlet of the extraction duct is located inside the discharge tank, the air outlet of the extraction duct is connected to the buffer, and the vacuum pump is installed on the top of the buffer.

[0012] In a preferred embodiment, the exhaust duct includes an exhaust branch duct and an exhaust main duct. One end of the exhaust branch duct is disposed inside the discharge tank and is located above the surface of the electrolyte solution inside the discharge tank. The other end of the exhaust branch duct is connected to the exhaust main duct, and the outlet of the exhaust main duct is connected to the buffer.

[0013] In a preferred embodiment, the exhaust branch pipe has a rectangular structure and is fitted to the top wall inside the discharge tank.

[0014] In a preferred embodiment, the exhaust branch pipe has multiple air inlets on the two side walls of the pipe section inside the discharge tank.

[0015] In a preferred embodiment, a pressure valve is provided on the exhaust branch pipe for real-time monitoring of the internal pressure of the discharge tank.

[0016] In a preferred embodiment, the discharge device includes three discharge tanks, which are connected in parallel on the vacuum extraction system, and each discharge tank contains two sets of rotating shaft assemblies.

[0017] Compared with the prior art, the beneficial effects of the present invention mainly include:

[0018] This invention provides a power battery discharge device that can avoid the generation of precipitates and gases. It can avoid or promptly remove precipitates around the battery cell, maintain the effective dissolution of the electrolyte solution, avoid crystallization, and improve discharge efficiency. At the same time, the gas generated inside the discharge tank can be discharged to the outside of the discharge tank through a vacuum ventilation system, which also improves the discharge efficiency of the discharge tank. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of the power discharge device described in this invention;

[0021] Figure 2 This is another overall structural schematic diagram of the power discharge device described in this invention;

[0022] Figure 3 This is an enlarged view of the interior of the discharge cell described in this invention.

[0023] As shown in the figure:

[0024] 100-Discharge cell;

[0025] 200-Spindle assembly, 210-Drive motor, 220-Spindle, 230-Clamping component, 231-Clamping plate;

[0026] 300 - Vacuum extraction system, 310 - Exhaust duct, 311 - Exhaust branch duct, 311a - Air inlet, 312 - Main exhaust duct, 320 - Buffer, 330 - Vacuum pump. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0028] To address the technical problem that the discharge efficiency of power batteries is affected by the generation of large amounts of gas and a certain amount of precipitates at the cathode and anode terminals when using existing discharge tanks, this invention proposes a power battery discharge device that avoids the generation of precipitates and gas. This discharge device is suitable for discharging battery cells, and its specific structure is as follows: Figures 1-3 As shown, it includes at least one discharge tank 100, a rotating shaft assembly 200, and a vacuum extraction system 300.

[0029] At least one set of rotating shaft assemblies 200 are provided inside the discharge tank 100. Each rotating shaft assembly 200 has a driving end and a rotating end. The driving end is fixedly installed on the side wall of the discharge tank 100, and the rotating end is located inside the discharge tank 100. Multiple battery cells are detachably installed around the rotating end and can rotate synchronously with the rotating end. In this way, as the battery cells rotate, the precipitates generated at the cathode and anode ends of the battery cells are continuously agitated, maintaining the effective dissolution of the electrolyte solution, avoiding the generation of precipitates at both ends of the battery cells, and improving the discharge efficiency.

[0030] Meanwhile, by placing the air inlet of the vacuum extraction system 300 inside the discharge tank 100, the gas generated at the cathode and anode of the battery cell is extracted by the vacuum extraction system 300 to the outside of the discharge tank 100, and the discharge efficiency is improved inside the discharge tank 100 because there is no gas inside.

[0031] In the above technical solution, when there are multiple discharge tanks 100, the multiple discharge tanks 100 are connected in parallel to the vacuum extraction system 300. The gas in each discharge tank 100 eventually enters the vacuum extraction system 300 and is then discharged into the atmosphere or treated before being discharged into the air.

[0032] Understandably, the different electrolyte solutions contained in the discharge tank 100 will result in different gases being generated at the cathode and anode of the battery cell. When the generated gases are hydrogen and oxygen, they can be directly discharged into the atmosphere. However, when the generated gases are polluting gases such as chlorine, they should be treated before being discharged into the air to avoid polluting the air.

[0033] In a preferred embodiment of the present invention, such as Figure 1 As shown, the discharge device includes three discharge tanks 100, which are arranged in parallel on the vacuum extraction system 300, and each discharge tank 100 has two sets of rotating shaft assemblies 200 inside.

[0034] Specifically, such as Figures 2-3 As shown, the rotating shaft assembly 200 includes a drive motor 210, a rotating shaft 220, and multiple clamping components 230. The drive motor 210 is fixedly mounted on the side wall of the discharge tank 100, the rotating shaft 220 is mounted on the power output end of the drive motor 210, and the multiple clamping components 230 are evenly arranged circumferentially along the outer wall of the rotating shaft 220 for clamping multiple battery cells.

[0035] To save internal space in the discharge tank 100, the drive motor 210 is installed on the outside of the side wall of the discharge tank 100, and the rotating shaft 220 is entirely located inside the discharge tank 100. The drive motor 210 is preferably a variable frequency motor.

[0036] What is understandable here is that Figure 2 and Figure 3 To facilitate the display of the internal structure of the discharge tank 100, one side wall of the discharge tank 100 is removed. However, in actual use, the discharge tank 100 is a closed box structure.

[0037] Specifically, in this embodiment, there are six clamping components 230, which are arranged at equal intervals on the outer circumference of the rotating shaft 220. Each clamping component 230 includes two clamping plates 231 arranged opposite to each other. The bottom of the clamping plate 231 is fixedly disposed on the outer wall of the rotating shaft 220. The gap between the two clamping plates 231 forms a clamping part for clamping the battery cell. In use, one rotating shaft assembly 200 can clamp multiple battery cells, further improving the battery discharge efficiency.

[0038] Specifically, the clamping plate 231 and the rotating shaft 220 are integrally formed, and the rotating shaft 220 is a hollow rotating shaft or a solid rotating shaft.

[0039] Specifically, the vacuum extraction system 300 includes an extraction duct 310, a buffer 320, and a vacuum pump 330. The air inlet of the extraction duct 310 is located inside the discharge tank 100, and the air outlet of the extraction duct 310 is connected to the buffer 320. The vacuum pump 330 is installed on the top of the buffer 320. Under the action of the vacuum pump 330, the air inside the discharge tank 100 is drawn into the buffer 320 and then discharged into the atmosphere or enters the next stage of the gas processing system.

[0040] Specifically, the exhaust duct 310 includes an exhaust branch duct 311 and an exhaust main duct 312. Each discharge tank 100 is provided with an exhaust branch duct 311. One end of the exhaust branch duct 311 is located inside the discharge tank 100 and above the surface of the electrolyte solution inside the discharge tank 100. The other end of the exhaust branch duct 311 is connected to the exhaust main duct 312. The air outlet of the exhaust main duct 312 is connected to the buffer 320. In this way, the gas inside each discharge tank 100 can be extracted through its respective exhaust branch duct 311 and enter the exhaust main duct 312.

[0041] Specifically, the exhaust branch pipe 311 has a rectangular structure and is fitted to the top wall inside the discharge tank 100. Furthermore, since the discharge tank 100 is a closed box structure, and the exhaust branch pipe 311 is also enclosed within the discharge tank 100, multiple air inlets 311a are provided on the two side walls of the pipe section inside the discharge tank 100 to achieve the exhaust function.

[0042] In addition, a pressure valve is installed on the exhaust branch pipe 311 to monitor the internal pressure of the discharge tank 100 in real time, providing a basis for scientific judgment.

[0043] Compared with existing discharge tank structures, this invention provides a power battery discharge device that avoids the generation of deposits and gases. By setting a rotating shaft assembly 200 inside the discharge tank 100 and clamping the battery cell onto the rotating shaft assembly 200, when the battery cell and the rotating shaft assembly 200 rotate synchronously, it can avoid or promptly remove deposits around the battery cell, maintain the effective dissolution of the electrolyte solution, avoid crystallization, and significantly improve discharge efficiency. At the same time, the gas generated inside the discharge tank 100 can be discharged to the outside of the discharge tank 100 through the vacuum extraction system 300, eliminating the influence of gas and further improving discharge efficiency. In short, the power battery discharge device provided by this invention, which avoids the generation of deposits and gases, has a higher discharge efficiency compared with existing discharge tanks.

[0044] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A power battery discharge device that avoids the generation of sediment and gas, characterized in that, Includes at least one discharge tank, a rotating shaft assembly, and a vacuum extraction system; The discharge tank is provided with at least one set of the rotating shaft assembly. The rotating shaft assembly has a driving end and a rotating end. The driving end is fixedly installed on the side wall of the discharge tank, and the rotating end is disposed inside the discharge tank. Multiple battery cells are detachably installed in the circumference of the rotating end and rotate synchronously with the rotating end. The air inlet of the vacuum extraction system is located inside the discharge tank and is used to extract the gas inside the discharge tank. Among them, multiple discharge cells are connected in parallel to the vacuum exhaust system; The rotating shaft assembly includes a drive motor, a rotating shaft, and multiple clamping components. The drive motor is fixedly mounted on the side wall of the discharge tank, and the rotating shaft is mounted on the power output end of the drive motor. The multiple clamping components are evenly arranged circumferentially along the outer wall of the rotating shaft, and the multiple battery cells are clamped in the clamping components. Each clamping component includes two opposing clamping plates. The bottom of the clamping plates is fixedly mounted on the outer wall of the rotating shaft, and the gap between the two clamping plates forms a clamping part for clamping the battery cells.

2. The power battery discharge device according to claim 1, which avoids the generation of precipitates and gases, is characterized in that, The clamping plate and the rotating shaft are integrally formed.

3. The power battery discharge device according to claim 1, which avoids the generation of precipitates and gases, is characterized in that, The vacuum extraction system includes an extraction duct, a buffer, and a vacuum pump. The air inlet of the extraction duct is located inside the discharge tank, the air outlet of the extraction duct is connected to the buffer, and the vacuum pump is installed on the top of the buffer.

4. A power battery discharge device that avoids the generation of precipitates and gases according to claim 3, characterized in that, The exhaust duct includes an exhaust branch duct and an exhaust main duct. One end of the exhaust branch duct is located inside the discharge tank and above the surface of the electrolyte solution inside the discharge tank. The other end of the exhaust branch duct is connected to the exhaust main duct, and the outlet of the exhaust main duct is connected to the buffer.

5. A power battery discharge device that avoids the generation of precipitates and gases according to claim 4, characterized in that, The exhaust branch pipe has a rectangular structure and is fitted to the top wall inside the discharge tank.

6. A power battery discharge device that avoids the generation of precipitates and gases according to claim 5, characterized in that, The exhaust branch pipe has multiple air inlets on the two side walls of the pipe section inside the discharge tank.

7. A power battery discharge device that avoids the generation of precipitates and gases according to claim 6, characterized in that, The exhaust branch pipe is equipped with a pressure valve for real-time monitoring of the internal pressure of the discharge tank.

8. A power battery discharge device that avoids the generation of precipitates and gases according to claim 1, characterized in that, The discharge device includes three discharge tanks, which are connected in parallel on the vacuum extraction system, and each discharge tank contains two sets of rotating shaft assemblies.

Images