Acid extraction device and method for lead-acid battery

Abstract

The invention provides an acid extraction device and method for a lead-acid battery, and relates to the technical field of storage battery production, the acid extraction device comprises acid extraction assemblies and a mounting assembly, and each acid extraction assembly comprises an acid extraction pipe, a protective sleeve and a first ultrasonic transducer. One end of the acid extraction pipe is connected with a negative pressure source, the other end of the acid extraction pipe is inserted into a storage battery cell, an acid liquid flowing channel is formed between the protective sleeve and the acid extraction pipe, and the ultrasonic transducer is used for separating bubbles in pores of the partition plate through vibration. The mounting assembly comprises a mounting plate, a plurality of gas path chambers are arranged on the plate and are in sealed connection with acid injection holes of the storage battery, and gas exhaust ports and pressurizing ports are formed in the gas path chambers, are used for controlling gas exhaust and high-pressure gas input respectively and are used for pressurizing acid liquor to permeate holes of the partition plates. Bubbles in the partition plate are discharged through ultrasonic vibration, sufficient permeation of acid liquor in the partition plate is achieved through pressurization, efficient acid extraction operation under the non-standing condition is achieved, it is ensured that the amount of the acid liquor in each cell is uniform and consistent, and therefore the production efficiency and performance consistency of storage batteries are greatly improved.

Description

Technical Field

[0001] This application relates to the technical field of lead-acid battery production, and particularly to a lead-acid battery acid extraction device and method. Background Art

[0002] Lead-acid batteries are important power supply devices in fields such as vehicle starting and energy storage systems. The formation process during their production is particularly crucial. In this process, it is necessary to inject electrolyte (sulfuric acid solution) into the battery cell grooves and activate the plate active substances through charge and discharge reactions. However, the gas generated during the formation process will push some acid solution into the grooves above the separator, and at the same time cause residual bubbles in the pores of the separator, resulting in insufficient filling and low saturation of the acid solution inside the separator. To ensure the consistency of battery performance, after formation, the battery needs to be statically placed to promote the discharge of bubbles and achieve sufficient adsorption of the acid solution by the separator. Currently, the industry generally relies on natural static placement, which usually takes 24 to 48 hours to ensure uniform distribution of the acid solution in each groove.

[0003] However, this traditional static placement process has obvious defects: the overly long static placement time severely restricts production efficiency, not only prolonging the production cycle, increasing time and equipment costs, but also causing delays in the production line flow and restricting the overall production capacity.

[0004] In addition, in the traditional acid extraction process after static placement, usually multiple acid extraction tubes are manually inserted into the acid injection holes of the battery respectively to perform acid extraction operations on the free acid in the grooves. This operation is greatly affected by human factors, and there will be problems of inconsistent acid extraction amounts in multiple grooves. In terms of performance, inconsistent acid amounts will affect the electrode potential of the battery, and then lead to voltage differences between individual batteries. During charging and discharging, the battery with a high voltage may be overcharged, while the battery with a low voltage may not be fully charged or over-discharged. This will not only affect the normal use of the battery pack but also may damage the battery.

[0005] In terms of lifespan, batteries with less acid are more likely to have problems such as plate sulfation and drying during charge and discharge, thus accelerating battery aging. While batteries with too much acid may face the situation of over-corroding the electrodes, which will also affect their lifespan.

[0006] Application Content

[0007] In view of this, this application proposes a lead-acid battery acid extraction device and method, aiming to solve the problems of low production efficiency and uneven distribution of acid amounts in multiple battery grooves caused by the traditional acid extraction method after static placement in the lead-acid battery formation process.

[0008] The technical solution of this application is realized as follows:

[0009] On the one hand, this application provides a lead-acid battery acid extraction device, including:

[0010] There are multiple acid pumping components. Each acid pumping component includes an acid pumping pipe, a protective sleeve, and a first ultrasonic transducer. One end of the acid pumping pipe is used to connect to a negative pressure source, and the other end passes through the acid injection hole of the storage battery and is inserted into the cell of the storage battery. The acid pumping pipe is in clearance fit with the acid injection hole. The protective sleeve is coaxially fixed inside the bottom of the acid pumping pipe, and an annular channel for the flow of acid solution is formed between the protective sleeve and the acid pumping pipe. The first ultrasonic transducer is arranged inside the protective sleeve and is used to transmit vibration to the acid solution in the cell to separate the bubbles in the pores of the separator.

[0011] The installation component includes an installation plate. Along the length direction of the bottom surface of the installation plate, a plurality of independent air path chambers are arranged at intervals. Each air path chamber is hermetically connected to the acid injection hole of the storage battery. The end of the acid pumping pipe away from the protective sleeve passes through the air path chamber and extends to the top surface of the installation plate. The air path chamber is communicated with the corresponding cell of the storage battery through the acid injection hole. An exhaust port and a pressurizing port are respectively arranged on the side wall of each air path chamber. The exhaust port is provided with a first electromagnetic valve to control the discharge of gas in the cell, and the pressurizing port is provided with a second electromagnetic valve to control the input of high-pressure gas into the cell. The high-pressure gas is used to drive the acid solution to pressurize and infiltrate the separator.

[0012] On the basis of the above technical solution, preferably, a first connecting pipe is arranged at the exhaust port, the first electromagnetic valve is arranged on the first connecting pipe, and an air flow sensor is also arranged on the first connecting pipe between the first electromagnetic valve and the exhaust port. The pressurizing port is provided with a second connecting pipe, the second electromagnetic valve is arranged on the second connecting pipe, and a pressure sensor is also arranged on the second connecting pipe between the second electromagnetic valve and the pressurizing port.

[0013] On the basis of the above technical solution, preferably, at least a part of the protective sleeve extends out of the bottom surface of the acid pumping pipe. The distance between the bottom surface of the protective sleeve and the bottom surface of the acid pumping pipe is 1 mm to 5 mm. A plurality of connecting ribs are uniformly arranged on the outer peripheral wall of the protective sleeve, and both ends of the connecting ribs are fixedly connected to the outer wall of the protective sleeve and the inner wall of the acid pumping pipe respectively.

[0014] On the basis of the above technical solution, preferably, the installation component further includes a fixing frame. The fixing frame is fixedly arranged above the installation plate. The upper end of the acid pumping pipe vertically passes through the installation plate and above the fixing frame, and a dynamic seal connection is arranged between the acid pumping pipe and the installation plate. A lifting module for driving the acid pumping pipe to move up and down is arranged on the fixing frame.

[0015] On the basis of the above technical solution, preferably, the acid pumping component further includes a liquid level sensor and a ranging sensor. Both the liquid level sensor and the ranging sensor are fixedly arranged on the outer wall of the acid pumping pipe. The liquid level sensor is used to detect the liquid level height at the top of the cell of the storage battery, and the ranging sensor is used to detect the distance between the separator and the bottom surface of the protective sleeve.

[0016] On the basis of the above technical solution, preferably, an ultrasonic component is further included. Two groups of the ultrasonic components are symmetrically arranged on both sides in the width direction of the mounting plate. The ultrasonic component includes a translation module and a plurality of second ultrasonic transducers. The plurality of second ultrasonic transducers are arranged at intervals along the length direction of the mounting plate, and each second ultrasonic transducer corresponds to the position of the battery cell of the storage battery. The translation module is horizontally and fixedly arranged on the fixing frame and is used to drive the second ultrasonic transducer to move horizontally to contact the outer wall of the battery cell of the storage battery.

[0017] On the basis of the above technical solution, preferably, a negative pressure suction pipe is further arranged on the first connecting pipe between the first solenoid valve and the air flow sensor and is used to connect to a negative pressure source.

[0018] Second, the present application also discloses a method for pumping acid from a lead-acid battery, which utilizes the lead-acid battery acid pumping device described in the first aspect, and includes the following steps:

[0019] S1. Insert the acid pumping pipes into the respective battery cells of the storage battery, place the mounting plate on the top surface of the mounting plate, ensure that the gas path chamber is hermetically connected to the acid injection hole of the storage battery, and adjust the depth of the acid pumping pipe inside the battery cell.

[0020] S2. Close the negative pressure source and the second solenoid valve of the acid pumping pipe, open the first solenoid valve, start the ultrasonic transducer, use ultrasonic energy to drive the bubbles in the separator to separate and discharge from the exhaust port, and detect the gas flow rate at the exhaust port through the air flow sensor to determine whether the bubble separation is completed.

[0021] S3. When the air flow sensor detects that the gas flow rate is lower than the threshold value and remains stable continuously, it is determined that the bubble separation is completed. Close the first solenoid valve, open the second solenoid valve, and input high-pressure gas into the battery cell in stages through the pressurizing port, and use the high-pressure gas to drive the acid solution to pressurize and infiltrate the separator.

[0022] S4. When the pressure sensor detects that the pressure value in the battery cell is lower than the threshold value and remains stable continuously, end the pressurizing action, open the first solenoid valve, turn on the negative pressure source to extract the acid solution through the acid pumping pipe, and stop pumping acid when the liquid level drops to the predetermined value.

[0023] On the basis of the above technical solution, preferably, step S2 further includes: when the gas flow rate is lower than the preset threshold value, increase the power of the first ultrasonic transducer to an enhanced power sufficient to accelerate the bubble separation, and monitor the air flow change rate in real time; if the air flow change rate drops below the preset safety threshold value, close the first solenoid valve.

[0024] On the basis of the above technical solution, preferably, the staged pressurization in step S3 includes:

[0025] In the initial pressurization stage, the air pressure is increased to a first pressure at a first rate and maintained for a first time period, and the air pressure within the first time period is used to fill the large-sized pores in the separator.

[0026] In the incremental pressurization stage, when the initial pressurization stage ends, if it is detected that the pressure fluctuation value exceeds a first preset threshold, the air pressure is increased to a second pressure at a second rate less than the first rate, the second pressure is greater than the first pressure, and is maintained for a second time period longer than the first time period to drive the acid solution to penetrate into the medium-sized pores.

[0027] In the equilibrium stage, when the pressure fluctuation value in the incremental pressurization stage is less than or equal to a second preset threshold, the air pressure is reduced to a third pressure and maintained for a third time period, the third pressure is less than the first pressure, and the pressurization ends after the air pressure sensor data is continuously stable for a fourth time period to inhibit the backflow of the micro-pore acid solution.

[0028] The present application has the following beneficial effects compared with the prior art:

[0029] (1) The acid pumping device disclosed in the present application, through the combined design of the acid pumping component and the installation component, especially uses ultrasonic vibration to quickly discharge the bubbles in the pores of the separator, and makes the acid solution fully penetrate into the pores of the separator by pressurization, realizing efficient acid pumping operation under non-static conditions, ensuring that the amount of acid solution in each grid is uniform, thereby greatly improving the production efficiency and performance consistency of the storage battery.

[0030] (2) By extending at least a part of the protective sleeve out of the bottom surface of the acid pumping tube, in this way, the protective sleeve can be as close to the separator as possible in the acid solution. When the first ultrasonic transducer is working, the vibration can be more effectively transmitted to the separator, accelerating the discharge of bubbles in the pores of the separator. At the same time, a part of the protective sleeve extends out of the bottom surface of the acid pumping tube, so that the outer peripheral side of the first ultrasonic transducer can be in full contact with the acid solution. By transmitting vibration energy into the acid solution, on the one hand, the efficiency of discharging bubbles in the separator can be improved. On the other hand, when the bubbles float to the liquid surface and gather, due to the diffusion of vibration energy in the acid solution, the rupture of bubbles on the liquid surface can be accelerated, enabling the bubbles to be quickly discharged.

[0031] (3) By setting the fixing frame and the lifting module, the depth of the acid pumping tube inside the grid can be flexibly adjusted, thereby controlling the distance between the protective sleeve and the separator, ensuring a safe distance between the first ultrasonic transducer and the separator. While avoiding damage to the top of the separator caused by contact vibration, ensuring that ultrasonic energy can effectively act on the separator and improving the efficiency of discharging bubbles in the separator.

[0032] (4) By arranging a plurality of second ultrasonic transducers outside the storage battery and combining with the first ultrasonic transducer at the bottom of the acid suction pipe, the ultrasonic vibration frequency can be greatly increased. Through high-frequency vibration to generate cavitation effect, the bubbles in the separator can be effectively separated and discharged, enabling the acid solution to infiltrate into the separator more evenly, ensuring the consistency of acid solution adsorption in the separator of each cell, and then improving the overall performance and consistency of the battery. (5) By arranging a negative pressure suction pipe on the first connecting pipe, during the ultrasonic exhaust process, negative pressure suction can be applied to the inside of the cell through the negative pressure source, which can accelerate the bubble discharge efficiency. At the same time, under the action of negative pressure suction, the bubbles released from the separator float to the liquid surface and can quickly burst under the action of negative pressure, further accelerating the discharge of bubbles and avoiding the accumulation of bubbles on the acid solution surface, which affects the subsequent pressurized infiltration effect and the extraction effect of excess acid solution.

[0033] (6) For the acid suction method disclosed in this application, by driving the separation of bubbles in the separator by ultrasonic waves and using high-pressure gas for pressurized penetration, the acid solution in the cell can be fully penetrated and absorbed in the pores of the separator. Compared with the traditional method of achieving the evacuation of bubbles in the separator and the absorption of acid solution in the separator by static means, this application actively evacuates the bubbles in the separator and pressurizes to achieve the absorption of acid solution in the separator, greatly reducing the time consumption caused by static means after formation, improving the acid suction efficiency after the formation of the storage battery, thereby improving the production efficiency of the storage battery. At the same time, by real-time monitoring the exhaust process, pressurization process and acid suction process, the entire production process can be operated with high precision, and the steps can be automatically adjusted according to the real-time situation, thereby avoiding the influence on the battery caused by errors or improper operations in manual operations. At the same time, it can ensure that the acid content in the separator and the remaining acid content in the cell after acid suction meet the requirements, ensuring the consistency of the acid amount in each cell of the storage battery and improving the performance consistency of the storage battery.

[0034] (7) By finely controlling the rising rate and time of the air pressure, the penetration of acid solution with different pore sizes can be achieved at different stages. This method of staged pressurization effectively ensures the depth and uniformity of acid solution penetration, while avoiding the common phenomenon of backflow, ensuring the uniform penetration of acid solution in the separator, ensuring that the acid content in the separator of each cell is uniform. Finally, by controlling the acid suction amount to ensure that the liquid level height in each cell after acid suction is the same, the acid amount in all cells of the entire storage battery can be ensured to be the same, improving the performance consistency of the storage battery. Description of the Drawings

[0035] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0036] Figure 1 Schematic diagram of the internal structure of the battery disclosed in the present application;

[0037] Figure 2 Schematic three-dimensional structure diagram of the assembly structure of the lead-acid battery acid extraction device and the battery disclosed in the present application;

[0038] Figure 3 Schematic diagram of the structure of the lead-acid battery acid extraction device removing the ultrasonic component disclosed in the present application;

[0039] Figure 4 Schematic three-dimensional structure diagram of the lead-acid battery acid extraction device disclosed in the present application;

[0040] Figure 5 Top view of the lead-acid battery acid extraction device disclosed in the present application;

[0041] Figure 6 For Figure 5 Cross-sectional view of the plane at A-A in

[0042] Figure 7 For Figure 5 Cross-sectional view of the plane at A-A in

[0043] Figure 8 Schematic diagram of the internal structure of the acid extraction pipe disclosed in the present application;

[0044] Reference numerals:

[0045] 1. Battery; 10. Box body; 11. Box cover; 110. Acid injection hole; 101. Grid groove; 12. Partition board; 13. Plate electrode; 2. Acid extraction assembly; 21. Acid extraction pipe; 22. Protective sleeve; 23. First ultrasonic transducer; 210. Annular channel; 211. Connecting rib; 24. Liquid level sensor; 25. Distance measuring sensor; 3. Installation assembly; 31. Installation plate; 311. Gas path chamber; 3111. Exhaust port; 3112. Pressurizing port; 3113. First solenoid valve; 3114. Second solenoid valve; 3115. First connecting pipe; 3116. Air flow sensor; 3117. Second connecting pipe; 3118. Pressure sensor; 3119. Negative pressure suction pipe; 32. Fixed frame; 33. Lifting module; 4. Ultrasonic assembly; 41. Translation module; 42. Second ultrasonic transducer. Detailed implementation manners

[0046] Next, in combination with the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0047] As Figure 1 shown, in combination with Figures 2 - 7 , the present application discloses a lead-acid battery acid pumping device, including an acid pumping component 2 and a mounting component 3.

[0048] Among them, a plurality of acid pumping components 2 are provided, and the number thereof corresponds to the number of cell grooves 101 of the storage battery 1, so as to facilitate separately pumping the excess acid liquid in the cell grooves 101 through the acid pumping components 2. This embodiment shows a specification of the storage battery 1, the number of its cell grooves 101 is 5, and the number of acid pumping components 2 is set to 5. In this embodiment, the storage battery 1 includes a box body 10 and a box cover 11. A plurality of cell grooves 101 are arranged along the length direction of the box body 10 and are located inside the box body 10, and the acid injection hole 110 is located on the box cover 11.

[0049] The acid pumping component 2 of this embodiment includes an acid pumping pipe 21. One end of the acid pumping pipe 21 is used to connect to a negative pressure source, and the other end passes through the acid injection hole 110 of the storage battery 1 and is inserted into the cell groove 101 of the storage battery 1. The acid pumping pipe 21 is in clearance fit with the acid injection hole 110. With this setting, the lower end of the acid pumping pipe 21 is inserted into the cell groove 101 and immersed below the acid liquid. Under the negative pressure of the external negative pressure source, the excess acid liquid in the cell groove 101 is pumped out. At the same time of pumping acid, due to the clearance fit between the acid pumping pipe 21 and the acid injection hole 110, external air can enter the inside of the cell groove 101 from the acid injection hole 110, so that the pressure in the cell groove 101 of the storage battery 1 is balanced with the external pressure, ensuring the smooth progress of the acid pumping process, and at the same time avoiding pumping out the adsorbed acid in the separator 12 during the acid pumping process.

[0050] In the prior art, the acid pumping link is usually carried out after the storage battery 1 is acidified and allowed to stand for 24h - 48h. After a long time of standing, the bubbles in the separator 12 have basically been eliminated, and the free acid above the cell groove 101 slowly falls back under the action of its own weight and is fully adsorbed by the separator 12 to reach acid liquid saturation. At this time, the excess acid liquid above the cell groove 101 can be pumped away by the acid pumping device.

[0051] However, too long standing time is an important factor affecting the production efficiency of the storage battery 1. In order to reduce the standing time, improve the production efficiency, and at the same time ensure that the acid amount is uniform inside each cell groove 101 of the storage battery 1, this embodiment realizes acid pumping under non-standing conditions and ensures the consistency of the acid amount. The specific implementation means are as follows.

[0052] The acid pumping assembly 2 of this embodiment further includes a protective sleeve 22 and a first ultrasonic transducer 23. Among them, the protective sleeve 22 is coaxially fixed to the inner side of the bottom of the acid pumping pipe 21, and an annular channel 210 for the flow of acid solution is formed between the protective sleeve 22 and the acid pumping pipe 21; the first ultrasonic transducer 23 is arranged in the protective sleeve 22 and is used to transmit vibration into the grid groove 101 to separate the bubbles in the pores of the separator 12.

[0053] With the above technical solution, after the charge-discharge formation is completed and without performing a standing operation, after inserting the lower end of the acid pumping pipe 21 into the acid solution in the grid groove 101, first, the first ultrasonic transducer 23 transmits vibration to the acid solution in the grid groove 101. The ultrasonic vibration can quickly separate the bubbles in the pores of the separator 12. The separated bubbles escape from the top surface of the acid solution and are discharged to the outside through the acid injection hole 110, ensuring that the subsequent acid solution can penetrate and fill the pores of the separator 12.

[0054] In this embodiment, the protective sleeve 22 is made of a corrosion-resistant material, preferably polytetrafluoroethylene, which can protect the first ultrasonic transducer 23 and prevent the acid solution from damaging the first ultrasonic transducer 23. The protective sleeve 22 is coaxially fixed to the lower inner side of the acid pumping pipe 21, and the annular channel 210 between the protective sleeve 22 and the acid pumping pipe 21 facilitates the smooth discharge of the acid solution along the annular channel 210 during subsequent acid pumping.

[0055] Due to the clearance fit between the acid pumping pipe 21 and the acid injection hole 110, the acid pumping assembly 2 cannot maintain a stable state in the grid groove 101. At the same time, after the bubbles in the separator 12 are discharged, the pores in the separator 12 do not fully absorb the acid solution. If the acid solution is directly pumped at this time, it will result in less acid adsorbed in the separator 12, reducing the acid amount in the entire grid groove 101 and affecting the performance of the battery.

[0056] In order to enable multiple acid pumping assemblies 2 to maintain a stable position in each grid groove 101 and at the same time enable the acid solution to be fully adsorbed by the separator 12, the acid pumping device of this embodiment is also provided with an installation assembly 3 to solve the above problems.

[0057] Specifically, the installation component 3 includes an installation plate 31. Along the length direction of the bottom surface of the installation plate 31, a plurality of independent gas path chambers 311 are arranged at intervals. Each gas path chamber 311 is hermetically connected to the acid injection hole 110 of the storage battery 1. One end of the acid extraction pipe 21 far away from the protective sleeve 22 passes through the gas path chamber 311 and extends to the top surface of the installation plate 31. With this arrangement, the acid extraction pipe 21 vertically passes through the gas path chamber 311, which can realize the position constraint of the acid extraction component 2 on the installation plate 31. During use, the lower end of the acid extraction pipe 21 is inserted into the acid injection hole 110 and extends into the grid groove 101. At this time, the bottom surface of the installation plate 31 contacts the top surface of the storage battery 1. The bottom surface of the installation plate 31 can be hermetically connected to the top surface of the storage battery 1 through a gasket, so that the gas path chamber 311 covers the outside of the acid injection hole 110. At this time, the gas path chamber 311, the acid injection hole 110 and the inside of the grid groove 101 are in communication.

[0058] On the side walls of each gas path chamber 311, an exhaust port 3111 and a pressurizing port 3112 are respectively provided. The exhaust port 3111 is provided with a first electromagnetic valve 3113 to control the discharge of gas in the grid groove 101, and the pressurizing port 3112 is provided with a second electromagnetic valve 3114 to control the input of high-pressure gas into the grid groove 101. The high-pressure gas is used to drive the acid liquid to be pressurized and infiltrate the separator 12.

[0059] With this arrangement, when discharging the bubbles in the separator 12, the second electromagnetic valve 3114 is closed and the first electromagnetic valve 3113 is opened. The gas path chamber 311 is communicated with the outside through the exhaust port 3111. Under the vibration of the first ultrasonic transducer 23, the bubbles in the pores of the separator 12 break away and float out of the liquid surface into the grid groove 101, enter the gas path chamber 311 through the acid injection hole 110, and finally are discharged through the exhaust port 3111. After the bubbles in the separator 12 are discharged, the first electromagnetic valve 3113 is closed, and the second electromagnetic valve 3114 is opened. High-pressure gas is filled into the gas path chamber 311 through the pressurizing port 3112. At this time, the negative pressure source connected to the acid extraction pipe 21 is in a closed state. The high-pressure gas enters the grid groove 101 through the gas path chamber 311 and the acid injection pipe. The high-pressure gas pressurizes the acid liquid in the grid groove 101, prompting the acid liquid to infiltrate into the pores of the separator 12, realizing that the separator 12 fully absorbs the acid liquid. When the acid liquid in the separator 12 is adsorbed and saturated, the pressurizing port 3112 is closed, the first electromagnetic valve 3113 is opened, and then the excess acid liquid above the separator 12 is sucked through the negative pressure source of the acid extraction pipe 21, which can realize the extraction of the excess acid liquid, maintain a stable acid liquid surplus in the grid groove 101, ensure that the acid liquid amounts in each grid groove 101 are uniform, ensure the consistency of the acid amounts in each grid groove 101 of the battery, and ensure the consistent performance of the storage battery 1.

[0060] The acid extraction device disclosed in this application adopts a design that combines an acid extraction component 2 and a mounting component 3. In particular, it utilizes ultrasonic vibration to quickly expel the bubbles in the pores of the partition plate 12, and makes the acid solution fully penetrate into the pores of the partition plate 12 through pressurization, realizing efficient acid extraction operation under non-static conditions, ensuring that the acid solution amounts in each cell 101 are uniform, thereby greatly improving the production efficiency and performance consistency of the storage battery 1.

[0061] In some embodiments, as shown in FIGS. Figure 3 and 4 7, a first connecting pipe 3115 is provided at the exhaust port 3111, a first solenoid valve 3113 is arranged on the first connecting pipe 3115, and an air flow sensor 3116 is also arranged on the first connecting pipe 3115 between the first solenoid valve 3113 and the exhaust port 3111. By means of the first solenoid valve 3113, the exhaust port 3111 can be opened or closed. By setting the air flow sensor 3116, during the exhaust process, the air flow sensor 3116 can monitor the flow rate and flow volume of the exhaust gas in real time, ensuring the stability and effectiveness of the gas discharge process. Specifically, when the air flow sensor 3116 detects that the gas flow is very small or basically no air flow is detected, it indicates that the bubbles in the partition plate 12 are discharged relatively fully, which can improve the effect of subsequent acid solution infiltration.

[0062] By setting the second solenoid valve 3114, the pressurization port 3112 can be opened or closed. By setting the air pressure sensor 3118, during the pressurization process, the pressure of the pressurized gas can be monitored in real time. Through the interlocking control with the second solenoid valve 3114, when it is detected that the pressure reaches the preset value or an abnormality occurs, the pressurization can be adjusted or closed in time to prevent over-pressurization or under-pressurization.

[0063] By precisely controlling the gas discharge and pressurization processes, ensuring the full discharge of bubbles in the partition plate 12 and the full infiltration of the acid solution, it helps to improve the uniformity of the acid solution amount in the battery cell 101, thereby enhancing the overall performance and consistency of the battery.

[0064] In some preferred embodiments, at least a part of the protective sleeve 22 extends out of the bottom surface of the acid extraction pipe 21. In this way, the protective sleeve 22 can be as close as possible to the partition plate 12 in the acid solution. When the first ultrasonic transducer 23 is working, the vibration can be more effectively transmitted to the partition plate 12, accelerating the discharge of bubbles in the pores of the partition plate 12. At the same time, since a part of the protective sleeve 22 extends out of the bottom surface of the acid extraction pipe 21, the outer peripheral side of the first ultrasonic transducer 23 can be in full contact with the acid solution. By transmitting vibration energy to the acid solution, on the one hand, the bubble discharge efficiency in the partition plate 12 can be improved. On the other hand, when the bubbles float to the liquid surface and gather, due to the diffusion of vibration energy in the acid solution, the rupture of bubbles on the liquid surface can be accelerated, enabling the bubbles to be quickly discharged.

[0065] In some embodiments, the distance between the bottom surface of the protective sleeve 22 and the bottom surface of the acid extraction tube 21 is 1 mm to 5 mm. With this structural solution, when the bottom surface of the protective sleeve 22 approaches the partition plate 12, a certain distance can be created between the bottom surface of the acid extraction tube 21 and the partition plate 12, preventing the adsorbed acid in the partition plate 12 from being extracted during the acid extraction process, ensuring the stability of the acid content in the partition plate 12. At the same time, after the excess acid liquid above the partition plate 12 is extracted, the acid amount in the entire cell 101 meets the requirements, and the acid amounts in the respective cells 101 of the battery 1 are consistent, thereby improving the performance consistency of the battery 1.

[0066] Since there are slight differences in the lengths of the internal partition plates 12 of the batteries 1 in different batches, in order to adjust the depth of the acid extraction tube 21 inside the cell 101 and prevent the bottom surface of the protective sleeve 22 from contacting the partition plate 12 during the insertion of the acid extraction tube 21 into the cell 101, which may cause damage to the partition plate 12 during vibration. This embodiment also sets the following solution. Specifically, the mounting assembly 3 further includes a fixing frame 32. The fixing frame 32 is fixedly arranged above the mounting plate 31. The upper end of the acid extraction tube 21 vertically passes through the mounting plate 31 and above the fixing frame 32 in a movable manner. The acid extraction tube 21 is movably and sealingly connected to the mounting plate 31. A lifting module 33 for driving the acid extraction tube 21 to move up and down is arranged on the fixing frame 32.

[0067] In the above embodiment, the fixing frame 32 and the mounting plate 31 are fixedly connected to form the mounting assembly 3. During actual use, a transfer mechanism or a manipulator can be arranged on the production line and connected to the fixing frame 32 on the mounting assembly 3 to drive the entire acid extraction device to move. When the height of the acid extraction tube 21 needs to be adjusted, the lifting module 33 can be used to drive the acid extraction tube 21 to move up and down, thereby adjusting the position of the acid extraction tube 21 in the cell 101.

[0068] For example, during the initial use, first, the lifting module 33 is used to drive the acid extraction tube 21 to move upward so that the bottom end of the acid extraction tube 21 is located in the gas path chamber 311. When the bottom surface of the mounting plate 31 contacts and seals the top surface of the battery 1 and the gas path chamber 311 corresponds to the positions of the respective acid injection holes 110, the lifting module 33 is then used to drive the acid extraction tube 21 to move downward so that the lower end of the acid extraction tube 21 is inserted into the cell 101 and descends to an appropriate position. This position mainly controls the distance between the first ultrasonic transducer 23 and the partition plate 12, preventing the first ultrasonic transducer 23 from directly contacting the partition plate 12 and causing the partition plate 12 to break due to vibration.

[0069] In some embodiments, referring to the appendix Figure 3 and 7As shown, the acid extraction assembly 2 further includes a liquid level sensor 24 and a ranging sensor 25. Both the liquid level sensor 24 and the ranging sensor 25 are fixedly arranged on the outer wall of the acid extraction pipe 21. The liquid level sensor 24 is used to detect the liquid level height at the top of the cell 101 of the battery 1, and the ranging sensor 25 is used to detect the distance between the partition 12 and the bottom surface of the protective sleeve 22.

[0070] Specifically, the ranging sensor 25 is arranged on the outer side of the bottom surface of the acid extraction pipe 21, and the liquid level sensor 24 is located on the outer side of the acid extraction pipe 21 above the ranging sensor 25. Both of them can be protected by a protective shell made of polytetrafluoroethylene. When the acid extraction pipe 21 descends in the cell 101, the ranging sensor 25 continuously detects the distance between the protective sleeve 22 and the partition 12. Since the distance between the ranging sensor 25 and the bottom surface of the protective sleeve 22 is known, during the descent of the acid extraction pipe 21, the ranging sensor 25 can continuously obtain the distance between the partition 12 and the bottom surface of the protective sleeve 22. When the distance between the bottom surface of the protective sleeve 22 and the partition 12 is less than 5 mm, the lifting module 33 is triggered to finely adjust the position of the acid extraction pipe 21, so that a relatively small distance, such as 1 mm or 2 mm, is maintained between the protective sleeve 22 and the partition 12, thereby ensuring that the ultrasonic energy effectively acts on the partition 12 and improving the bubble discharge efficiency of the partition 12.

[0071] After the acid solution is pressurized and infiltrated into the partition 12, the liquid level height in the cell 101 can be obtained through the liquid level sensor 24. Subtracting 1 mm - 2 mm from the liquid level height gives the excess acid solution. At this time, under the suction of the acid extraction pipe 21, the excess acid solution is sucked away. When the liquid level height is 1 - 2 mm above the bottom surface of the partition 12, it indicates that the acid suction is completed. By reserving 1 - 2 mm of acid solution on the top surface of the partition 12, it can be avoided that there is no acid solution on the top surface of the cell 101, resulting in the phenomena of sulfation and drying of the electrode plate 13 due to insufficient acid amount.

[0072] Refer to the attached Figure 8 As shown, a number of connecting ribs 211 are evenly arranged on the outer peripheral wall of the protective sleeve 22. Both ends of the connecting ribs 211 are fixedly connected to the outer wall of the protective sleeve 22 and the inner wall of the acid extraction pipe 21 respectively.

[0073] Since the diameter of the acid extraction pipe 21 is limited by the diameter of the acid injection hole 110, the volume of the first ultrasonic transducer 23 is limited, and its rated power cannot fully meet the requirement of discharging bubbles from the partition 12 in a short time. It is necessary to go through a long vibration time to achieve bubble discharge. However, if the bubble discharge time is too long, to a certain extent, it will also reduce the production efficiency of the battery 1.

[0074] Therefore, in this embodiment, an ultrasonic assembly 4 is further provided. Refer to the attached Figure 4 and 7As shown in the figure, there are two sets of ultrasonic components 4 symmetrically arranged on both sides of the width direction of the mounting plate 31. The ultrasonic components 4 include a translation module 41 and a plurality of second ultrasonic transducers 42. The plurality of second ultrasonics are arranged at intervals along the length direction of the mounting plate 31, and each second ultrasonic transducer 42 corresponds to the position of the cell 101 of the storage battery 1. The translation module 41 is horizontally and fixedly arranged on the fixing frame 32 and is used to drive the second ultrasonic transducer 42 to move horizontally to contact the outer wall of the cell 101 of the storage battery 1.

[0075] By symmetrically arranging the ultrasonic components 4 on both sides of the mounting plate 31, it can ensure that the vibration of the ultrasonic wave is evenly distributed in the entire cell 101 area of the storage battery 1, enhance the overall vibration effect of the acid pumping device, ensure that each cell 101 can fully act on the ultrasonic energy, thereby effectively removing the bubbles in the cell 101 and improving the absorption efficiency of the acid solution.

[0076] The plurality of second ultrasonic transducers 42 are arranged at intervals along the length direction of the mounting plate 31 and correspond to the positions of the cells 101 of the storage battery 1, ensuring the precise positioning of the ultrasonic transducers. This precise configuration makes the action range of the ultrasonic wave more accurate, effectively improves the precision and efficiency of the vibration, and prevents the waste or uneven distribution of the ultrasonic energy. By arranging a plurality of second ultrasonic transducers 42 outside the storage battery 1 and combining with the first ultrasonic transducer 23 at the bottom of the acid pumping pipe 21, the ultrasonic vibration frequency can be greatly increased. Through the cavitation effect generated by high-frequency vibration, the bubbles in the separator 12 can be effectively separated and discharged, so that the acid solution can infiltrate into the separator 12 more evenly, ensuring the consistency of the acid solution adsorption in the separator 12 in each cell 101, and further improving the overall performance and consistency of the battery.

[0077] In the above embodiment, the introduction of the translation module 41 enables the second ultrasonic transducer 42 to move horizontally, ensuring that the transducer can contact the outer wall of the cell 101 of the storage battery 1. When the acid pumping device and the storage battery 1 are installed, the distance between the second ultrasonic transducers 42 on both sides of the width direction of the fixing frame 32 can be increased first. After the acid pumping pipe 21 is successfully inserted into the cell 101, the distance between the second ultrasonic transducers 42 is shortened, so that the second ultrasonic transducers 42 can fully contact the outside of the cell 101 of the storage battery 1. The second ultrasonic transducers 42 on both sides of the storage battery 1 apply vibration to the inside of the cell 101 in opposite directions respectively, and the vibration effects converge towards the middle of the separator 12. By synchronously vibrating the middle of the separator 12 through the first ultrasonic transducer 23, the vibration can be dispersed to the entire battery cell 101, further improving the evacuation efficiency of the bubbles in the separator 12 in the cell 101, avoiding the phenomenon of uneven acid solution infiltration caused by uneven evacuation of the bubbles in the separator 12, and further optimizing the performance consistency of the battery.

[0078] The translation module 41 in this embodiment is a cylinder or an oil cylinder.

[0079] As some embodiments, a negative pressure suction pipe 3119 is further provided on the first connecting pipe 3115 between the first solenoid valve 3113 and the airflow sensor 3116 for connecting to a negative pressure source. By setting the negative pressure suction pipe 3119, during the ultrasonic exhaust process, negative pressure suction can be realized inside the grid groove 101 through the negative pressure source, which can accelerate the bubble discharge efficiency. At the same time, under the action of negative pressure suction, the bubbles released in the partition plate 12 float to the liquid surface and can quickly burst under the action of negative pressure, further accelerating the discharge of bubbles and avoiding the accumulation of bubbles on the surface of the acid solution, which affects the subsequent pressurized infiltration effect and the extraction effect of excess acid solution.

[0080] This application also discloses a method for extracting acid from a lead-acid battery, including the following steps:

[0081] S1. Insert the acid extraction pipe 21 into each grid groove 101 of the storage battery 1 respectively, and place the mounting plate 31 on the top surface of the mounting plate 31 to ensure that the air circuit chamber 311 is hermetically connected to the acid injection hole 110 of the storage battery 1, and adjust the depth of the acid extraction pipe 21 inside the grid groove 101.

[0082] In this step, the acid extraction pipe 21 and the mounting plate 31 are connected by dynamic sealing. The sealing structure can be in multiple ways such as bearing sealing, lip seal, and packing seal. In this way, it is ensured that the acid extraction pipe 21 can move up and down relative to the mounting plate 31, and the connection between the acid extraction pipe 21 and the mounting plate 31 is in a sealed state, which can prevent high-pressure gas from leaking from the connection between the acid extraction pipe 21 and the mounting plate 31 during the pressurization process.

[0083] In this step, the acid extraction pipe 21 and the mounting plate 31 are connected by dynamic sealing. The sealing structure can be in multiple ways such as bearing sealing, lip seal, and packing seal. In this way, it is ensured that the acid extraction pipe 21 can move up and down relative to the mounting plate 31, and the connection between the acid extraction pipe 21 and the mounting plate 31 is in a sealed state, which can prevent high-pressure gas from leaking from the connection between the acid extraction pipe 21 and the mounting plate 31 during the pressurization process.

[0084] S2. Close the negative pressure source of the acid suction pipe 21 and the second solenoid valve 3114 to isolate the acid suction pipe 21 path and prevent interference with the discharge of bubbles. Open the first solenoid valve 3113, start the first ultrasonic transducer 23, use the ultrasonic cavitation effect to separate the bubbles in the partition plate 12, and make the bubbles discharge from the exhaust port 3111. Detect the gas flow rate at the exhaust port 3111 through the gas flow sensor 3116 to determine whether the bubble separation is completed.

[0085] Ultrasonic waves can generate tiny vibrations, promoting the separation of bubbles from the pores of the partition plate 12. In this way, the bubbles in the partition plate 12 can be effectively removed, facilitating the subsequent infiltration of acid solution into the partition plate 12 by pressurization, and ensuring the acid adsorption saturation rate of the partition plate 12. The introduction of the gas flow sensor 3116 enables real-time monitoring of the bubble separation process. When the gas flow rate is lower than the set threshold and stable, it can accurately judge that the bubble separation is completed, and then enter the next stage.

[0086] S3. When the gas flow sensor 3116 detects that the gas flow rate is lower than the threshold and remains stable, it is determined that the bubble separation is completed. Close the first solenoid valve 3113, open the second solenoid valve 3114, and input high-pressure gas into the grid groove 101 in stages through the pressurization port 3112, and use the high-pressure gas to drive the acid solution to pressurize and infiltrate the partition plate 12.

[0087] Through the pressurization of high-pressure gas, the acid solution can enter the tiny pores of the partition plate 12 with higher permeability and diffusivity, so that the internal pores of the partition plate 12 can fully absorb the acid solution, and the acid content in the partition plate 12 is stabilized.

[0088] Pressurize in stages to match the pore structure, avoid sudden pressure changes from damaging the partition plate 12, ensure that the acid solution fully infiltrates the tiny pores, and improve the consistency of battery capacity.

[0089] S4. When the pressure sensor 3118 detects that the pressure value in the grid groove 101 is lower than the threshold and remains stable, end the pressurization operation, open the first solenoid valve 3113, open the negative pressure source to extract the acid solution through the acid suction pipe 21, and stop the acid extraction when the liquid level drops to the predetermined value.

[0090] In this step, the suction volume is feedback-controlled through the liquid level sensor 24. When the liquid level drops to 1-2 mm above the partition plate 12, the acid extraction is stopped to avoid excessive acid extraction, resulting in sulfuration and drying of the electrode plate 13. The negative pressure source uses a vacuum pump, and the acid extraction rate is dynamically adjusted by the PID algorithm.

[0091] The acid extraction method disclosed in this application drives the separation of bubbles in the partition plate 12 through ultrasonic waves, and uses high-pressure gas for pressurized penetration to achieve sufficient penetration and absorption of the acid solution in the partition plate 12 pores in the grid groove 101. Compared with the traditional method of achieving the evacuation of bubbles in the partition plate 12 and the absorption of acid solution in the partition plate 12 by means of static placement, this application actively evacuates the bubbles in the partition plate 12 and uses the pressurization method to absorb the acid solution in the partition plate 12, greatly reducing the time consumption caused by the static placement means after formation, improving the acid extraction efficiency of the battery 1 after formation, thereby improving the production efficiency of the battery 1. At the same time, by real-time monitoring the exhaust process, pressurization process and acid extraction process, the entire production process can be operated with high precision, and the steps can be automatically adjusted according to the real-time situation, thereby avoiding the influence on the battery caused by errors or improper operations in manual operations. At the same time, it can ensure that the acid content in the partition plate 12 and the remaining acid content in the grid groove 101 after acid extraction meet the requirements, ensure that the acid amounts in each grid groove 101 of the battery 1 are consistent, and improve the performance consistency of the battery 1.

[0092] As some embodiments, step S2 further includes: when the gas flow rate is lower than a preset threshold, increasing the power of the ultrasonic transducer to an enhanced power sufficient to accelerate bubble separation, and real-time monitoring the air flow change rate; if the air flow change rate drops below a preset safety threshold, closing the first solenoid valve 3113.

[0093] When the gas flow rate is low, increasing the power of the ultrasonic transducer can enhance the ultrasonic energy, thereby accelerating the separation of bubbles, shortening the separation time, and improving work efficiency. By real-time monitoring the air flow change rate, when it is detected that the air flow change rate drops below the preset safety threshold, the first solenoid valve 3113 can be timely closed to avoid damage to the partition plate 12 caused by too high ultrasonic power.

[0094] In this embodiment, the powers of the first ultrasonic transducer 23 and the second ultrasonic transducer 42 can be increased synchronously.

[0095] Suppose that in actual operation, the preset threshold of the gas flow rate is 10 L / min. When the gas flow rate is detected to be lower than 10 L / min, the power of the ultrasonic transducer will be increased from the conventional power (for example, 100 W) to the enhanced power (for example, 150 W). At the same time, the air flow sensor 3116 will real-time monitor the air flow change rate. Suppose the preset safety threshold is 0.5 L / (min·s). When the air flow change rate drops below 0.5 L / (min·s), the system will automatically close the first solenoid valve 3113 to stop the further increase of the ultrasonic power, ensuring the safety and effectiveness of the whole process.

[0096] As some preferred embodiments, the staged pressurization in step S3 includes:

[0097] In the initial pressurization stage, the air pressure is increased to the first pressure at the first rate and maintained for the first time period. The air pressure within the first time period is used to fill the large-sized pores in the separator 12.

[0098] During the pressurization process, the acid solution first penetrates into the larger pores in the separator 12. These pores are generally more likely to absorb the acid solution. Therefore, the settings of the first pressure and the time period can ensure that the large pores are completely filled with the acid solution, improving the infiltration efficiency of the acid solution.

[0099] In actual operation: Assume that in the initial pressurization stage, the first rate is 0.2 bar / min, a relatively slow pressurization rate to avoid the impact caused by too high air pressure. The first pressure is 1.0 bar, and the first time period is 5 minutes. In this stage, the air pressure gradually increases from 0 to 1.0 bar and lasts for 5 minutes to ensure that the large pores are fully filled.

[0100] In the increasing pressurization stage, when the initial pressurization stage ends, if it is detected that the pressure fluctuation value exceeds the first preset threshold, the air pressure is increased to the second pressure at a second rate less than the first rate. The second pressure is greater than the first pressure and is maintained for a second time period longer than the first time period to drive the acid solution to penetrate into the medium-sized pores.

[0101] After filling the large pores in the first stage, in the increasing pressurization stage, the air pressure is continuously increased at a lower rate, enabling the acid solution to penetrate into the medium-sized pores, thereby increasing the penetration depth of the acid solution. The increasing pressurization helps to finely adjust the pressure, allowing the acid solution to gradually penetrate into smaller pores without causing over-penetration or reverse flow due to too high air pressure. Monitoring the pressure fluctuation ensures the stability of the pressurization process and avoids potential damage to the battery separator 12 when the air pressure is too high.

[0102] In actual operation, assume that in the increasing pressurization stage, the second rate is 0.15 bar / min, and the pressurization rate is lower than that in the first stage to avoid too rapid increase in air pressure. The second pressure is 1.8 bar, higher than the first pressure, and is used to drive the acid solution to penetrate into the medium pores. The pressurization duration (the second time period) is 10 minutes. Pressure fluctuation monitoring: Set the first preset threshold to ±0.05 bar. If the pressure fluctuation exceeds this threshold, adjust the rate or end this stage. If the pressure fluctuation exceeds the threshold, it may be necessary to temporarily adjust the pressurization rate or increase the inspection steps. If the pressure fluctuation remains below the threshold, continuously maintain the current pressurization rate until it reaches 1.8 bar.

[0103] In the equilibrium stage, when the pressure fluctuation value in the increasing pressurization stage is less than or equal to the second preset threshold, the air pressure is reduced to the third pressure and maintained for the third time period. The third pressure is less than the first pressure, and the pressurization ends until the data of the air pressure sensor 3118 is continuously stable for the fourth time period to inhibit the backflow of the acid solution in the micropores.

[0104] During the actual operation process, assume that in the balancing stage, the third rate is 0.1 bar / min, and the air pressure is gradually reduced at a slower rate to avoid backflow caused by too rapid pressure changes. The target pressure (the third pressure) is 0.5 bar (lower than the first pressure to reduce the backflow of acid solution in the micropores). The pressurization duration (the third time period) is 5 minutes. Monitoring data: The second preset threshold: Set to ±0.02 bar, indicating that when the pressure fluctuation drops within this range, it can be considered that the pressurization process has tended to be balanced. The fourth time period: If the air pressure remains stable for 5 consecutive minutes (i.e., around 0.5 bar), the pressurization stage ends.

[0105] In this stage, by reducing the air pressure, the negative impact of excessive pressure on the separator 12 is avoided, and at the same time, the backflow phenomenon of the microporous acid solution is prevented. By precisely controlling the pressure, it is ensured that the acid solution can be evenly and steadily distributed throughout the separator 12. By gradually reducing the air pressure, the reverse flow of the acid solution in the micro-pores is avoided, and it is ensured that the acid solution evenly infiltrates into each pore of the separator 12, especially those with smaller sizes. This process helps to maintain the stability and consistency of the pressurization process.

[0106] By finely controlling the lifting rate and time of the air pressure, the acid solution penetration of different pore sizes can be achieved at different stages. This staged pressurization method effectively ensures the depth and uniformity of the acid solution penetration, while avoiding the common backflow phenomenon, ensuring that the acid solution penetrates evenly in the separator 12, ensuring that the acid content in the separators 12 in each cell 101 is uniform. Finally, by controlling the acid extraction amount to ensure that the liquid levels in each cell 101 are the same after acid extraction, the acid amounts in all cells 101 of the entire battery 1 can be ensured to be the same, improving the performance consistency of the battery 1.

[0107] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A lead-acid battery acid extraction device, characterized in that: include: Acid extraction components are provided in multiple numbers, each of which includes an acid extraction tube, a protective cover and a first ultrasonic transducer. One end of the acid extraction tube is used to connect to a negative pressure source, and the other end passes through the acid injection hole of the battery and is inserted into the grid of the battery. The acid extraction tube and the acid injection hole are gap-matched, and the protective cover is coaxially fixed to the inner side of the bottom of the acid extraction tube, and an annular channel for acid flow is formed between the protective cover and the acid extraction tube; the first ultrasonic transducer is provided in the protective cover, and is used to transmit vibration to the grid to separate bubbles in the pores of the partition; The mounting assembly comprises a mounting plate, wherein a plurality of independent air path chambers are arranged at intervals along the length direction on the bottom surface of the mounting plate, each of the air path chambers is respectively sealed and connected with the acid injection hole of the battery, an end of the acid extraction tube away from the protective sleeve passes through the air path chamber and extends to the top surface of the mounting plate, the air path chamber is connected with the corresponding battery grid through the acid injection hole, an exhaust port and a pressurizing port are respectively arranged on the side wall of each air path chamber, the exhaust port is provided with a first solenoid valve to control the discharge of gas in the grid, and the pressurizing port is provided with a second solenoid valve to control the input of high-pressure gas into the grid, and the high-pressure gas is used to drive the acid liquid to pressurize and infiltrate the partition.

2. The lead-acid battery acid extraction device according to claim 1, characterized in that: A first connecting pipe is arranged at the exhaust port, a first solenoid valve is arranged on the first connecting pipe, an air flow sensor is also arranged on the first connecting pipe between the first solenoid valve and the exhaust port, a second connecting pipe is arranged at the pressurizing port, a second solenoid valve is arranged on the second connecting pipe, and an air pressure sensor is also arranged on the second connecting pipe between the second solenoid valve and the pressurizing port.

3. The lead-acid battery acid extraction device according to claim 1, characterized in that: At least a portion of the protective sleeve extends out of the bottom surface of the acid extraction tube, and the spacing between the bottom surface of the protective sleeve and the bottom surface of the acid extraction tube is 1mm to 5mm. A plurality of connecting ribs are evenly arranged on the outer peripheral wall of the protective sleeve, and the two ends of the connecting ribs are fixedly connected to the outer wall of the protective sleeve and the inner wall of the acid extraction tube respectively.

4. The lead-acid battery acid extraction device according to claim 3, characterized in that: The mounting assembly also includes a fixing frame, which is fixedly arranged above the mounting plate. The upper end of the acid extraction tube vertically moves through the mounting plate and above the fixing frame. The acid extraction tube and the mounting plate are dynamically sealed and connected. The fixing frame is provided with a lifting module for driving the acid extraction tube to move up and down.

5. The lead-acid battery acid extraction device according to claim 4, characterized in that: The acid extraction component also includes a liquid level sensor and a distance sensor, both of which are fixedly arranged on the outer wall of the acid extraction tube. The liquid level sensor is used to detect the liquid level height at the top of the battery grid, and the distance sensor is used to detect the distance from the partition to the bottom surface of the protective cover.

6. The lead-acid battery acid extraction device according to claim 4, characterized in that: It also includes an ultrasonic component, which is symmetrically arranged in two groups and is respectively located on both sides of the width direction of the mounting plate. The ultrasonic component includes a translation module and a plurality of second ultrasonic transducers. The plurality of second ultrasonic transducers are arranged at intervals along the length direction of the mounting plate, and each second ultrasonic transducer corresponds to a cell position of the battery. The translation module is horizontally fixed on a fixing frame and is used to drive the second ultrasonic transducers to move horizontally to contact the outer wall of the battery cell.

7. The lead-acid battery acid extraction device according to claim 2, characterized in that: A negative pressure suction pipe is also provided on the first connecting pipe between the first solenoid valve and the airflow sensor for connecting to a negative pressure source.

8. A method for extracting acid from a lead-acid battery, which utilizes the lead-acid battery extracting acid device as claimed in any one of claims 2 to 7, characterized in that: The steps include: S1. Insert the acid extraction tubes into the respective grids of the battery, and place the mounting plate on the top surface of the mounting plate to ensure that the gas path chamber and the acid injection hole of the battery are sealed and connected, and adjust the depth of the acid extraction tube inside the grid; S2, close the negative pressure source of the acid extraction pipe and the second solenoid valve, open the first solenoid valve, start the first ultrasonic transducer, use ultrasonic energy to drive the bubbles in the partition to separate and discharge from the exhaust port, and detect the gas flow rate of the exhaust port through the air flow sensor to determine whether the bubble separation is completed; S3, when the air flow sensor detects that the gas flow rate is lower than the threshold and remains stable, it is determined that the bubble separation is completed, the first solenoid valve is closed, the second solenoid valve is opened, and high-pressure gas is input into the cell in stages through the pressurization port, and the high-pressure gas is used to drive the acid liquid to pressurize and infiltrate the partition; S4. When the air pressure sensor detects that the pressure value in the grid is lower than the threshold value and remains stable, the pressurization action is terminated, the first solenoid valve is opened, the negative pressure source is turned on to extract acid through the acid extraction pipe, and the acid extraction is stopped when the liquid level drops to a predetermined value.

9. The lead-acid battery acid extraction method according to claim 8, characterized in that: Step S2 also includes: when the gas flow rate is lower than a preset threshold, increasing the power of the ultrasonic transducer to an enhanced power sufficient to accelerate bubble separation, and monitoring the airflow change rate in real time; if the airflow change rate drops below a preset safety threshold, closing the first solenoid valve.

10. The lead-acid battery acid extraction method according to claim 8, characterized in that: The staged pressurization in step S3 includes: In the initial pressurization stage, the gas pressure is increased to a first pressure at a first rate and maintained for a first period of time, wherein the gas pressure is used to fill the large-sized pores in the separator during the first period of time; In the incremental pressurization stage, when the initial pressurization stage ends, if it is detected that the pressure fluctuation value exceeds a first preset threshold, the gas pressure is increased to a second pressure at a second rate less than the first rate, the second pressure is greater than the first pressure, and is maintained for a second time period longer than the first time period, so as to drive the acid to penetrate into the medium-sized pores; In the equilibrium stage, when the pressure fluctuation value in the incremental pressurization stage is less than or equal to the second preset threshold, the air pressure is reduced to a third pressure and maintained for a third time period. The third pressure is less than the first pressure until the air pressure sensor data reaches a fourth time period continuously and stably, and then the pressurization is terminated to inhibit the backflow of microporous acid.

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