WO2024239128A1 - Electrochemical intercalation/deintercalation control method, system, control unit, device and storage medium - Google Patents

Abstract

The present description relates to the technical field of electrochemistry. Provided are an electrochemical intercalation/deintercalation control method, a system, a control unit, a device and a medium. The method comprises: controlling a power supply module to supply power in a constant-current mode to a plurality of intercalation/deintercalation units of an electrochemical intercalation/deintercalation cell system; acquiring the working voltages of the plurality of intercalation/deintercalation units collected by a voltage collecting unit; from amongst the plurality of intercalation/deintercalation units, determining an intercalation/deintercalation unit having a working voltage greater than or equal to a corresponding preset voltage threshold value as a target intercalation/deintercalation unit; and controlling a target centripetal stirrer in the target intercalation/deintercalation unit to stir a liquid to be subjected to intercalation/deintercalation in an accommodating chamber of the target intercalation/deintercalation unit. The method solves the problems that, during the process of supplying power to the plurality of intercalation/deintercalation units connected in series in a constant-current mode first and then in a constant-voltage mode, when power is supplied in the constant-current mode, if the voltage on a certain intercalation/deintercalation unit is about to exceed a safe working voltage thereof, constant-current power supply will be adjusted to constant-voltage power supply, such that other intercalation/deintercalation units cannot continue to work during constant-current power supply, resulting in reduced intercalation/deintercalation efficiency of an electrochemical intercalation/deintercalation cell.

Description

Electrochemical deintercalation control method, system, control unit, device and storage medium Technical Field

The present invention relates to the field of electrochemical technology, and more specifically, to an electrochemical deintercalation control method, system, control unit, device and storage medium.

Background Art

In recent years, with the rapid development of new energy vehicles and electronic products, lithium and its compounds have been widely used, which has led to a sharp increase in global demand for lithium resources. The development and utilization of lithium resources has also received more and more attention. Salt lake brine contains a large amount of lithium resources. Therefore, selective lithium extraction from salt lake brine has become the main way to obtain lithium. How to efficiently extract lithium from salt lake brine has also become a research hotspot.

Generally, the methods for extracting lithium from salt lakes include precipitation, carbonization, calcination, solution extraction, and electrochemical extraction. Among these methods, electrochemical lithium extraction refers to placing the salt lake brine in an electrochemical deintercalation tank with multiple deintercalation units, and using each deintercalation unit to cause a chemical reaction in the salt lake brine to obtain the lithium in the salt lake brine. Electrochemical lithium extraction has attracted much attention due to its high efficiency, energy saving, safety, and environmental protection.

In the prior art, a control method for an electrochemical deintercalation tank is to connect multiple deintercalation units in parallel, and to supply power to the multiple deintercalation units in parallel through a power supply so that the power supply voltage of each deintercalation unit is consistent. Although this method can solve the problem of reliable power supply, it has the problems of low lithium deintercalation efficiency and high manufacturing cost of the electrochemical deintercalation tank. There is also a method of connecting multiple deintercalation units in series, and using a single power supply device to supply power to the multiple deintercalation units in series in a mode of constant current first and then constant voltage. However, the series power supply method requires that each de-embedding unit be strictly consistent to ensure that each de-embedding unit reaches a safe operating voltage at the same time to maximize the lithium extraction efficiency. However, it is difficult to ensure that each de-embedding unit is completely consistent in the actual manufacturing process. Therefore, when a single power supply device is used to power multiple de-embedding units in series in constant current mode, as the lithium extraction time increases, when other de-embedding units are working normally, the voltage on a certain de-embedding unit will exceed its safe operating voltage, and the de-embedding unit will be in an abnormal working state. In order to avoid damage to the de-embedding unit, the power supply mode of the entire electrochemical de-embedding cell will be adjusted to a single power supply device constant voltage power supply, resulting in the other de-embedding units connected in series being unable to continue to exert the maximum lithium extraction efficiency during the constant current power supply process.

Summary of the invention

The purpose of this article is to provide an electrochemical deintercalation control method, system, control unit, device and storage medium to address the deficiencies in the above-mentioned prior art, so as to solve the problem that in the prior art, a single power supply device is used to power multiple deintercalation units connected in series in a constant current mode. When the deintercalation units are not completely consistent, the voltage on a certain deintercalation unit will exceed its safe working voltage, and then the power supply mode of the entire electrochemical deintercalation tank will be adjusted to a single power supply device constant voltage power supply, resulting in the other deintercalation units connected in series with it being unable to continue to exert the maximum lithium extraction efficiency during the constant current power supply process.

To achieve the above objectives, some embodiments adopt the following technical solutions:

In a first aspect, some embodiments provide an electrochemical deintercalation control method, the method being applied to electrochemical deintercalation A control unit in a tank system, the method comprising:

Controlling the power supply module to supply power to the multiple de-embedding units of the electrochemical de-embedding tank system in a constant current mode;

Acquire the operating voltages of the plurality of de-embedding units collected by a voltage collection unit;

According to the working voltages of the multiple embedding units and the corresponding preset voltage thresholds, determining from the multiple embedding units an embedding unit whose working voltage is greater than or equal to the corresponding preset voltage threshold as a target embedding unit; wherein the preset voltage threshold corresponding to each embedding unit is less than a preset safe working voltage of each embedding unit, and the preset safe working voltage is a safe working voltage of each embedding unit;

A target centripetal stirrer provided in the target de-embedding unit is controlled to stir the liquid to be de-embedded in the accommodating chamber of the target de-embedding unit, so as to reduce the working voltage of the target de-embedding unit.

In some embodiments, the method further comprises:

If it is monitored that the working voltage of the target de-embedding unit is less than the corresponding preset voltage threshold, the target centripetal stirrer is controlled to stop stirring the to-be-de-embedding liquid in the accommodating chamber of the target de-embedding unit.

In some embodiments, controlling the target centripetal stirrer provided in the target de-embedding unit to stir the liquid to be de-embedded in the accommodating chamber of the target de-embedding unit comprises:

If the number of times that the working voltage of the target deembedding unit is greater than or equal to the corresponding preset voltage threshold within a preset historical time period is less than or equal to a preset number threshold, the target centripetal agitator provided in the target deembedding unit is controlled to stir the liquid to be deembedding in the accommodating cavity of the target deembedding unit.

In some embodiments, the method further comprises:

If the number of times that the working voltage of the target de-embedding unit is greater than or equal to the corresponding preset voltage threshold within the preset historical time period is greater than the preset number threshold, the target centripetal agitator is controlled to stop stirring the to-be-de-embedded liquid in the accommodating chamber of the target de-embedding unit, and the power supply module is controlled to supply power to the target de-embedding unit in a constant pressure mode;

Alternatively, if the working time of the target centripetal agitator provided in the target deembedding unit is greater than or equal to the preset time, the target centripetal agitator is controlled to stop stirring the liquid to be deembedded in the accommodating chamber of the target deembedding unit, and the power supply module is controlled to supply power to the target deembedding unit in a constant pressure mode;

Alternatively, if the operating voltage of the target de-embedding unit is greater than or equal to a preset safe operating voltage, the target centripetal agitator is controlled to stop stirring the liquid to be de-embedded in the accommodating chamber of the target de-embedding unit, and the power supply module is controlled to power the target de-embedding unit in a constant pressure mode.

In some embodiments, the method further comprises:

Controlling the alarm module corresponding to the target de-embedding unit in the electrochemical de-embedding tank system to sound an alarm.

In some embodiments, the method further comprises:

Control the alarm module corresponding to the target de-embedding unit in the electrochemical de-embedding tank system to stop alarming.

In a second aspect, some embodiments provide an electrochemical deintercalation tank system, comprising: an electrochemical deintercalation tank, a power supply module, a voltage collection unit, a centripetal stirrer, and a control unit; the electrochemical deintercalation tank comprises: a plurality of deintercalation units, wherein each deintercalation unit has a receiving cavity for accommodating a liquid to be deintercalated; the power supply module is connected to the wiring terminals of the plurality of deintercalation units;

The input end of the voltage collection unit is connected to the wiring terminals of the plurality of embedding and de-embedding units; at least one of the plurality of centripetal stirrers is respectively arranged in the accommodating chambers of the plurality of embedding and de-embedding units; the output end of the voltage collection unit is connected to the control unit, and the control unit is also connected to the power supply module and each of the centripetal stirrers;

The control unit is used to execute the electrochemical deintercalation control method provided in the above embodiment.

In some embodiments, each of the deintercalation units comprises: an electrode plate pair; or,

Each of the de-embedding units comprises: an electrode plate group consisting of a plurality of electrode plate pairs connected in parallel; or,

Each of the de-embedding units comprises a de-embedding tank having a plurality of electrode plate groups, and each electrode plate group is composed of a plurality of electrode plate pairs connected in parallel.

In some embodiments, the electrochemical de-embedding cell system further includes: a plurality of alarm modules, wherein the plurality of alarm modules are connected to the control unit.

In some embodiments, the voltage collection unit includes: a plurality of voltage collectors, the input ends of the plurality of voltage collectors are respectively connected to the connection ends of the plurality of de-embedding units, and the output ends of the plurality of voltage collectors are respectively connected to the control unit.

In a third aspect, some embodiments provide a control unit, which is applied to the above-mentioned electrochemical deintercalation tank system, and the control unit includes:

A power supply control module, used to control the power supply module to supply power to the multiple de-embedding units of the electrochemical de-embedding tank system in a constant current mode or a constant voltage mode;

An acquisition module, used for acquiring the operating voltages of the plurality of de-embedding units acquired by a voltage acquisition unit;

A determination module, configured to determine, according to the operating voltages of the plurality of embedding units and the corresponding preset voltage thresholds, an embedding unit whose operating voltage is greater than or equal to the corresponding preset voltage threshold from the plurality of embedding units as a target embedding unit; wherein the preset voltage threshold corresponding to each embedding unit is less than a preset safe operating voltage of each embedding unit;

The stirring control module is used to control the target centripetal stirrer provided in the target de-embedding unit to stir the liquid to be de-embedded in the accommodating chamber of the target de-embedding unit, so as to reduce the working voltage of the target de-embedding unit.

In a fourth aspect, some embodiments provide a processing device, comprising: a processor, a storage medium and a bus, wherein the storage medium stores machine-readable instructions executable by the processor, and when the processing device is running, the processor communicates with the storage medium via the bus, and the processor executes the machine-readable instructions to perform the steps of the method described in the first aspect above.

In a fifth aspect, some embodiments provide a storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the method described in the first aspect are executed.

One or more of the above-mentioned technical solutions have at least the following beneficial effects: an electrochemical de-embedding control method and an electrochemical de-embedding tank system are provided, wherein the electrochemical de-embedding control method is applied to a control unit in the electrochemical de-embedding tank system, and the method comprises: controlling a power supply module to supply power to a plurality of de-embedding units of the electrochemical de-embedding tank system in a constant current mode; obtaining the working voltages of the plurality of de-embedding units collected by a voltage collection unit; determining, from the plurality of de-embedding units, a de-embedding unit having a working voltage greater than or equal to the corresponding preset voltage threshold value as a target de-embedding unit according to the working voltages of the plurality of de-embedding units and the corresponding preset voltage threshold value; wherein the preset voltage threshold value corresponding to each de-embedding unit is less than the preset safe working voltage of each de-embedding unit; and controlling a target centripetal agitator provided in the target de-embedding unit to stir the liquid to be de-embedded in the accommodating chamber of the target de-embedding unit to reduce the working voltage of the target de-embedding unit. By adopting the electrochemical deintercalation control method provided in this article, when a single power supply device is used to supply constant current to multiple deintercalation units in series, when the operating voltage of the target deintercalation unit is about to exceed its preset safe operating voltage, the control unit can control the target centripetal agitator corresponding to the target deintercalation unit to stir the liquid to be deintercalated in the accommodating chamber corresponding to the deintercalation unit, thereby reducing the polarization resistance of the target deintercalation unit, and the operating voltage of the target deintercalation unit can be reduced accordingly, so that the operating voltage of the target deintercalation unit will not exceed its preset safe operating voltage, and can continue to exert maximum efficiency, thereby increasing the time for the target deintercalation unit to exert maximum efficiency, and avoiding the problem of switching the single power supply device to constant voltage power supply in order to protect the target deintercalation unit, so that other deintercalation units connected in series with it cannot continue to exert maximum lithium extraction efficiency in constant current mode, thereby improving the lithium extraction efficiency of the entire electrochemical deintercalation tank.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of this invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of this invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

FIG1 is a schematic diagram of the structure of an electrochemical deintercalation tank system provided in some embodiments;

FIG2 is a schematic diagram of a cross-sectional structure of an electrochemical deintercalation tank provided in some embodiments;

FIG3 is a schematic structural diagram of another electrochemical deintercalation tank system provided in some embodiments;

FIG4 is a schematic flow diagram of an electrochemical deintercalation control method provided in some embodiments;

FIG5 is a schematic diagram of the performance of the de-embedding unit provided in some embodiments when it is working;

FIG6 is a schematic diagram of the structure of a control unit provided in some embodiments;

FIG. 7 is a schematic diagram of the structure of a processing device provided in some embodiments.

Explanation of the accompanying drawings: 1. Electrochemical de-embedding tank; 2. Power supply module; 3. Voltage acquisition unit; 4. Centripetal stirrer; 5. Control unit.

DETAILED DESCRIPTION

To make the purpose, technical solutions and advantages of the embodiments of this article clearer, the following will be combined with the accompanying drawings in the embodiments of this article. The technical solutions in the embodiments of this article are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of this article, rather than all the embodiments.

The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

This article is aimed at the deintercalation control method of the electrochemical deintercalation tank. There are two existing electrochemical deintercalation control methods. One is to connect multiple deintercalation units in parallel and use multiple power supply devices to supply constant voltage to multiple deintercalation units respectively. Although this method can solve the problem of reliable power supply, it has the problems of low lithium deintercalation efficiency and high cost of electrochemical deintercalation tank production. Therefore, another control method is proposed: using a single power supply device to supply power to multiple deintercalation units connected in series in a constant current and then constant voltage mode to solve the problems of low lithium deintercalation efficiency and high cost of electrochemical deintercalation tank production caused by constant voltage power supply.

Referring to FIG5 , during the process from 0 to t ₁ , the power supply current provided by the power supply device to the deintercalation unit is a constant current. As time goes on, at time t ₁ , the working voltage of the deintercalation unit rises to the preset voltage threshold, and then it switches to a constant voltage output mode, maintaining the deintercalation and lithium extraction reaction until the current value is zero. That is, at t ₁ , the power supply mode of the power supply device switches from constant current power supply to constant voltage power supply, and t ₁ -t ₂ is constant voltage power supply. At this stage, the polarization resistance gradually increases, the current will become smaller, and the movement rate of lithium ions will become slower and slower, and the deintercalation speed will gradually decrease until the current is zero at time t ₂ , and the deintercalation unit is stopped for electrochemical deintercalation at time t ₂ .

However, if a single power supply device supplies power to multiple deintercalation units in series in constant current mode, the deintercalation units cannot be completely consistent, and the voltage on a certain deintercalation unit will exceed its safe working voltage. Then, in order to avoid the voltage on the deintercalation unit exceeding its safe working voltage and being damaged, the power supply mode of the entire electrochemical deintercalation tank will be adjusted to a single power supply device constant voltage power supply, resulting in other deintercalation units in series with the deintercalation unit also unable to continue to work normally in a constant current state, resulting in low lithium extraction efficiency of the entire electrochemical deintercalation tank. Based on this, this article provides an electrochemical deintercalation control method and an electrochemical deintercalation tank system.

In addition, the flowcharts used in this article illustrate operations implemented according to some embodiments of this article. It should be understood that, in the absence of conflict, the features in the embodiments of this article can be combined with each other, the operations of the flowcharts can be implemented out of order, and the steps without logical contextual relationships can be reversed in order or implemented simultaneously. In addition, those skilled in the art can add one or more other operations to the flowchart under the guidance of the content of this article, and can also remove one or more operations from the flowchart.

The electrochemical deintercalation control method and electrochemical deintercalation tank system provided in this article are described below with reference to multiple figures through multiple examples. A specific example is given below.

First, the electrochemical deintercalation cell system provided in this article is described with reference to FIGS. 1-3 .

Figure 1 is a schematic diagram of the structure of an electrochemical deintercalation tank system provided in some embodiments, and Figure 2 is a schematic diagram of the structure of an electrochemical deintercalation tank provided in some embodiments. As shown in Figures 1 and 2, some embodiments provide an electrochemical deintercalation tank system, including: an electrochemical deintercalation tank 1, a power supply module 2, a voltage acquisition unit 3, a centripetal stirrer 4, and a control unit 5.

Among them, the electrochemical deintercalation tank includes multiple deintercalation units, each of which has a receiving cavity for receiving the liquid to be deintercalated, the deintercalation unit is used to cause the liquid to be deintercalated to undergo a chemical reaction to extract lithium, and the receiving cavity is used to receive the liquid to be deintercalated; the power supply module is connected to the wiring terminals of the multiple deintercalation units, and is used to power the multiple deintercalation units connected in series; the input end of the voltage collection unit is connected to the wiring terminals of the multiple deintercalation units, and is used to collect the working voltages of the multiple deintercalation units; at least one centripetal stirrer is respectively arranged in the receiving cavity of the multiple deintercalation units, and is used to stir the liquid to be deintercalated in the receiving cavity; the output end of the voltage collection unit is connected to the control unit, and is used to send the collected information of the working voltages of the multiple deintercalation units to the control unit; the control unit is also connected to the power supply module and the multiple centripetal stirrers; the control unit is used to execute the following electrochemical deintercalation control method to realize the control of the voltage collection unit, the multiple centripetal stirrers, and the power supply module.

It should be noted that, in the present embodiment, the liquid to be deintercalated may be, for example, salt lake brine containing lithium, and each deintercalation unit in the electrochemical deintercalation tank may be used alone to extract lithium from the liquid to be deintercalated. The electrochemical deintercalation tank is provided with multiple deintercalation units in order to improve the deintercalation efficiency. In the present embodiment, a constant current followed by a constant voltage power supply mode is adopted, and constant current power is first supplied to multiple deintercalation units so that the voltage values of the multiple deintercalation units are continuously increased. When the voltage value is about to reach the safe working voltage, it is converted to constant voltage power supply so that the working voltage of the deintercalation unit is maintained at a higher value, so as to give full play to the deintercalation efficiency of the salt lake brine. The voltage collection unit may be a voltage collector including multiple voltage collection points, and each voltage collection point may be connected to the wiring terminal of the deintercalation unit connected in series to collect the working voltages of the multiple deintercalation units. The number of centripetal agitators in the accommodating chamber of each deintercalation unit is greater than or equal to 1, that is, there is at least one centripetal agitator in the accommodating chamber of each deintercalation unit.

In some embodiments, each deintercalation unit may include only an electrode plate pair; or each deintercalation unit includes an electrode plate group consisting of a plurality of electrode plate pairs connected in parallel; or each deintercalation unit includes a deintercalation tank having a plurality of electrode plate groups, each electrode plate group consisting of a plurality of electrode plate pairs connected in parallel. Each electrode plate pair can be used alone to extract lithium from the liquid to be deintercalated.

FIG3 is a schematic diagram of the structure of another electrochemical de-embedding tank system provided by some embodiments. As shown in FIG3, in a possible implementation example, the electrochemical de-embedding tank system further includes a plurality of alarm modules, and the plurality of alarm modules are connected to the control unit. The alarm module is used to alarm when the working voltage of the de-embedding unit is greater than or equal to the preset voltage threshold to alert the staff. Each alarm module corresponds to a de-embedding unit. When the control unit detects that the working voltage of a de-embedding unit is greater than or equal to the corresponding preset voltage threshold, an alarm control signal is sent to the alarm module corresponding to the de-embedding unit. Based on the alarm control signal, the alarm module can alarm.

It should be noted that the alarm module can be a sound and/or light alarm device, or other types of alarm devices, as long as the alarm information issued by the alarm module can be promptly known to the staff.

In some embodiments, in addition to the voltage collection unit provided in the above embodiments being a voltage collector including multiple voltage collection points, the voltage collection unit may also include multiple voltage collectors, the input ends of the multiple voltage collectors are respectively connected to the connection terminals of the multiple de-embedding units, and the output ends of the multiple voltage collectors are respectively connected to the control unit.

In summary, using the electrochemical deintercalation tank system provided by the present embodiment, the control unit can receive the information of the working voltages of the multiple deintercalation units sent by the voltage acquisition unit, and based on the information, determine whether the current working voltage of each deintercalation unit is greater than or equal to the preset voltage threshold. When the working voltage of a certain deintercalation unit is greater than or equal to its corresponding preset voltage threshold, the deintercalation unit is used as the target deintercalation unit, and the target centripetal agitator provided in the target deintercalation unit is controlled to stir the liquid to be deintercalated in the accommodating chamber of the target deintercalation unit, so that the polarization resistance of the target deintercalation unit is reduced, and the working voltage of the target deintercalation unit can be reduced accordingly, so that the working voltage of the target deintercalation unit will not exceed its preset safe working voltage, and can continue to exert maximum efficiency, increasing the time for the target deintercalation unit to exert maximum efficiency, and also avoiding the problem of switching the single power supply device to constant voltage power supply in order to protect the target deintercalation unit, so that other deintercalation units connected in series with it cannot continue to exert maximum lithium extraction efficiency in constant current mode, thereby improving the lithium extraction efficiency of the entire electrochemical deintercalation tank.

Among them, the preset voltage threshold of the de-embedding unit is lower than the preset safe working voltage, which can ensure that when the current working voltage of the de-embedding unit is higher than the preset voltage threshold, it will not exceed its preset safe working voltage, thereby avoiding damage to the de-embedding unit; the preset voltage threshold is a pre-acquired value, and in actual operation, the preset voltage threshold can be pre-acquired according to the various working parameters of the de-embedding unit.

The electrochemical deintercalation control method provided in this article is described below in conjunction with FIG. 4 and FIG. 5 .

FIG4 is a schematic flow chart of an electrochemical deintercalation control method provided in some embodiments. The method is applied to a control unit in the above-mentioned electrochemical deintercalation tank system. As shown in FIG4 , the method includes:

S401, controlling the power supply module to supply power to a plurality of de-embedding units of the electrochemical de-embedding tank system in a constant current mode.

FIG5 is a schematic diagram of the performance generated when the embedding units provided in some embodiments are working. As shown in FIG5 , this article adopts a power supply method of first constant current and then constant voltage. First, constant current power supply is used to continuously increase the voltage values of multiple embedding units. When the voltage value is about to reach the safe working voltage, it is converted to constant voltage power supply, so that the embedding units can fully exert their performance.

As shown in FIG5 , 0-t ₁ is a constant current power supply, and t ₁ -t ₂ is a constant voltage power supply. When the constant voltage power supply is used, the current continuously decreases to 0. The current in the 0-t ₁ stage is larger than that in the t ₁ -t ₂ stage, the movement rate of lithium ions is faster, and the deintercalation speed is fast; in the t ₁ -t ₂ stage, the polarization resistance gradually increases, the current becomes smaller, and the movement rate of lithium ions becomes slower and slower, and the deintercalation speed gradually decreases. This embodiment aims to improve the deintercalation efficiency by increasing the duration of the constant current power supply, that is, increasing the time that the deintercalation unit is in the 0-t ₁ stage, so as to reduce the unit time required for deintercalation.

Therefore, when the electrochemical deintercalation cell starts working, the control unit needs to control the power supply module to supply power to multiple deintercalation units of the electrochemical deintercalation cell system in a constant current mode. The current value of the constant current is determined by actual needs and is not limited here.

S402: Acquire the operating voltages of the plurality of de-embedding units collected by the voltage collection unit.

While the power supply module supplies power to multiple de-embedding units of the electrochemical de-embedding tank system in a constant current mode, the working voltages of the multiple de-embedding units are also continuously increased. It can be seen from the above embodiments that the input end of the voltage acquisition unit is connected to the wiring terminals of the multiple de-embedding units, and the working voltages of the multiple de-embedding units can be collected. The output end of the voltage acquisition unit is connected to the control unit, and the collected working voltage can be sent to the control unit. Therefore, while the power supply module supplies power to multiple de-embedding units of the electrochemical de-embedding tank system in a constant current mode, the control unit can obtain the working voltages of the multiple de-embedding units collected by the voltage acquisition unit in real time.

S403 . According to the operating voltages of the plurality of embedding units and the corresponding preset voltage thresholds, determine, from the plurality of embedding units, an embedding unit whose operating voltage is greater than or equal to the corresponding preset voltage threshold as a target embedding unit.

After the control unit obtains the working voltages of the multiple embedding units in real time according to step S402, the control unit may detect the current working voltage of each embedding unit according to the working voltages of the multiple embedding units and the preset voltage thresholds corresponding to the multiple embedding units. When the working voltage of a certain embedding unit is greater than or equal to the corresponding preset voltage threshold, the embedding unit is used as a target embedding unit, wherein the preset voltage threshold corresponding to each embedding unit is less than the preset safe working voltage of each embedding unit.

It can be understood that in the liquid to be deintercalated in the accommodating chamber of the target deintercalation unit, the lithium concentration of the solution in each place is different. When the concentration difference is too large, the resistance value of the deintercalation unit is too large. Under the premise of constant current, the working voltage of the target deintercalation unit is about to exceed its safe working voltage, and there is a risk of damage. Therefore, it is necessary to determine from multiple deintercalation units that the working voltage is greater than or equal to the corresponding preset voltage threshold as the target deintercalation unit, and take measures to reduce the working voltage of the target deintercalation unit. Among them, the preset voltage threshold of the target deintercalation unit is less than the preset safe working voltage of the target deintercalation unit.

For example, when the deintercalation unit is an electrode plate pair, the electrode plate pair is used to extract lithium, and lithium ions will be deposited on the positive electrode of the electrode plate pair. The lithium ion concentration around the negative electrode is lower than that around the positive electrode, which will produce a concentration difference and increase the polarization resistance of the electrode plate pair. Since the current is constant, the increased resistance will cause the working voltage of the electrode plate pair to increase. When multiple electrode plate pairs are powered in series, while other electrode plate pairs are working normally, since the multiple electrode plate pairs cannot be completely consistent, the working voltage of a certain electrode plate pair will exceed its preset safe working voltage. At this time, voltage reduction measures can be taken for the electrode plate pair, thereby extending the time for the electrode plate pair to exert maximum efficiency.

S404: Control the target centripetal stirrer provided in the target de-embedding unit to stir the liquid to be de-embedded in the accommodating cavity of the target de-embedding unit to reduce the working voltage of the target de-embedding unit.

After the target de-embedding unit is determined according to step S403, since the working voltage of the target de-embedding unit is positively correlated with the concentration of the liquid to be de-embedded, at least one centripetal stirrer may be provided in the accommodating chamber of each de-embedding unit, and the centripetal stirrer is connected to the control unit. When the working voltage of the target de-embedding unit is greater than or equal to the corresponding preset voltage threshold, the control unit may control the target centripetal stirrer provided in the target de-embedding unit to stir the liquid to be de-embedded in the accommodating chamber of the target de-embedding unit, thereby reducing the concentration difference of the liquid to be de-embedded in the accommodating chamber, reducing the polarization resistance value, and reducing the target Operating voltage of the de-embedding unit.

Optionally, the target centripetal stirrer can stir the liquid to be deintercalated in the accommodating chamber of the target deintercalating unit at a fixed speed, or can stir the liquid to be deintercalated in the accommodating chamber of the target deintercalating unit at a stepped speed. The stepped speed means stirring at a faster speed first and then at a slower speed, or stirring at a slower speed first and then at a faster speed.

In summary, the present embodiment provides an electrochemical de-embedding control method, which is applied to a control unit in an electrochemical de-embedding tank system, and the method includes controlling a power supply module to power multiple de-embedding units of the electrochemical de-embedding tank system in a constant current mode; obtaining the working voltages of the multiple de-embedding units collected by a voltage collection unit; determining, from the multiple de-embedding units, a de-embedding unit whose working voltage is greater than or equal to the corresponding preset voltage threshold as a target de-embedding unit according to the working voltages of the multiple de-embedding units and the corresponding preset voltage threshold; and controlling a target centripetal agitator provided in the target de-embedding unit to stir the liquid to be de-embedding in the accommodating chamber of the target de-embedding unit. By adopting the electrochemical deintercalation control method provided in the present embodiment, when a plurality of deintercalation units connected in series are powered by a constant current power supply, when the operating voltage of a target deintercalation unit is about to exceed its preset safe operating voltage, the control unit can control the target centripetal agitator corresponding to the target deintercalation unit to stir the liquid to be deintercalated in the accommodating chamber corresponding to the deintercalation unit, thereby reducing the polarization resistance of the target deintercalation unit, and the operating voltage of the target deintercalation unit can be reduced accordingly, so that the operating voltage of the target deintercalation unit will not exceed its preset safe operating voltage, and can continue to exert maximum efficiency, thereby increasing the time for the target deintercalation unit to exert maximum efficiency, and avoiding the problem that a single power supply device is switched to a constant voltage power supply in order to protect the target deintercalation unit, so that other deintercalation units connected in series with it cannot continue to exert maximum lithium extraction efficiency in the constant current mode, thereby improving the lithium extraction efficiency of the entire electrochemical deintercalation tank.

Some embodiments of the present invention also provide another electrochemical de-embedding control method. In a possible implementation example, while the control unit controls the target centripetal agitator provided in the target de-embedding unit to stir the liquid to be de-embedded in the accommodating chamber of the target de-embedding unit, the voltage acquisition unit collects the working voltage of the target de-embedding unit in real time and sends the collected information to the control unit. The control unit detects the received information. When the control unit monitors that the working voltage of the target de-embedding unit is less than the corresponding preset voltage threshold, the target centripetal agitator is controlled to stop stirring the liquid to be de-embedding in the accommodating chamber of the target de-embedding unit.

In some embodiments, in step S404, controlling the target centripetal stirrer provided in the target de-embedding unit to stir the liquid to be de-embedded in the accommodating chamber of the target de-embedding unit may also include one or more of methods 1-3, and methods 1-3 are as follows:

1. The number of times that the working voltage of the target de-embedding unit is greater than or equal to the corresponding preset voltage threshold within a preset historical time period is queried. If the number of times that the working voltage of the target de-embedding unit is greater than or equal to the corresponding preset voltage threshold within the preset historical time period is less than or equal to the preset number threshold, the target centripetal agitator set in the target de-embedding unit is controlled to stir the liquid to be de-embedded in the accommodating cavity of the target de-embedding unit; if the number of times that the working voltage of the target de-embedding unit is greater than or equal to the corresponding preset voltage threshold within the preset historical time period is greater than the preset number threshold, the target centripetal agitator is controlled to stop stirring the target The liquid to be de-embedded in the accommodating chamber of the de-embedded unit is stirred, and the power supply module is controlled to supply power to the target de-embedded unit in a constant pressure mode. The preset number threshold is a preset value, and the preset historical time period is a preset time period before the current time. The values of the preset number threshold and the preset historical time period can be set according to actual needs, for example, it can be the past 1 hour, and the preset number threshold and the preset historical time period are not limited here.

By adopting this method, if the number of times that the working voltage of the target deembedding unit is greater than or equal to the corresponding preset voltage threshold within the preset historical time period is greater than the preset number threshold, the target centripetal agitator is controlled to stop stirring the liquid to be deembedding in the accommodating chamber of the target deembedding unit, and the power supply module is controlled to supply power to the target deembedding unit in a constant pressure mode, which can avoid the situation where the working voltage of the target deembedding unit cannot be reduced after multiple stirrings, and avoid the risk that the working voltage of the target deembedding unit exceeds its preset safety voltage.

Take the preset number threshold of 1 as an example for explanation: when the working voltage of the target de-embedding unit is greater than or equal to its corresponding preset voltage threshold for the first time, the control unit controls its corresponding target centripetal agitator to stir the liquid to be de-embedded in the accommodating chamber of the target de-embedding unit, so that the working voltage of the target de-embedding unit is reduced to below the preset voltage threshold. Afterwards, as time goes by, the working voltage of the target de-embedding unit is greater than or equal to its corresponding preset voltage threshold for the second time. At this time, it can be considered that the concentration difference of the liquid to be de-embedded in the accommodating chamber of the target de-embedding unit has reached the minimum value, and continuing to stir the liquid to be de-embedded in the accommodating chamber of the target de-embedding unit can no longer reduce the working voltage of the target de-embedding unit. Then, the target centripetal agitator is controlled to stop stirring the liquid to be de-embedded in the accommodating chamber of the target de-embedding unit, and the power supply module is controlled to power the target de-embedding unit in a constant pressure mode.

2. When the target centripetal agitator starts to stir the liquid to be deembedded in the accommodating chamber of the target deembedding unit, the working time of the target centripetal agitator is counted. If the working time of the target centripetal agitator is less than the preset time, the target centripetal agitator is controlled to continue stirring the liquid to be deembedded in the accommodating chamber of the target deembedding unit; if the working time of the target centripetal agitator is greater than or equal to the preset time, the target centripetal agitator is controlled to stop stirring the liquid to be deembedded in the accommodating chamber of the target deembedding unit, and the power supply module is controlled to supply power to the target deembedding unit in a constant pressure mode. The preset time is a preset value, and the value of the preset time is not limited here.

By adopting this method, when the working time of the target centripetal agitator is greater than or equal to the preset time, the target centripetal agitator is controlled to stop stirring the liquid to be de-embedded in the accommodating chamber of the target de-embedded unit, and the power supply module is controlled to supply power to the target de-embedded unit in a constant pressure mode, thereby preventing the operating voltage of the target de-embedded unit from being unable to be reduced even after a single long-term stirring, and avoiding the risk of the operating voltage of the target de-embedded unit exceeding its preset safety voltage.

Take the preset time of 20 minutes as an example: when the target centripetal agitator starts to stir the liquid to be deembedded in the accommodating chamber of the target deembedded unit, the working time of the target centripetal agitator is counted. If the working time of the target centripetal agitator is greater than or equal to 20 minutes, the control unit controls the target centripetal agitator to stop stirring the liquid to be deembedded in the accommodating chamber of the target deembedded unit, and controls the power supply module to power the target deembedded unit in a constant pressure mode.

3. When the target centripetal stirrer starts to stir the liquid to be de-embedded in the receiving chamber of the target de-embedded unit, The working voltage of the target de-embedding unit is collected. If the working voltage of the target de-embedding unit is less than the preset safe working voltage, the target centripetal agitator is controlled to continue stirring the liquid to be de-embedded in the accommodating chamber of the target de-embedding unit; if the working voltage of the target de-embedding unit is greater than or equal to the preset safe working voltage, the target centripetal agitator is controlled to stop stirring the liquid to be de-embedded in the accommodating chamber of the target de-embedding unit, and the power supply module is controlled to supply power to the target de-embedding unit in a constant voltage mode. The preset safe working voltage is the safe working voltage of the target de-embedding unit.

By adopting this method, when the working voltage of the target de-embedding unit is greater than or equal to the preset safe working voltage, the target centripetal stirrer is controlled to stop stirring the liquid to be de-embedded in the accommodating chamber of the target de-embedding unit, and the power supply module is controlled to supply power to the target de-embedding unit in a constant voltage mode, so as to prevent the working voltage of the target de-embedding unit from exceeding its preset safe working voltage due to an accident, and avoid the risk of the working voltage of the target de-embedding unit exceeding its preset safe voltage. An accident is an event that can cause stirring but cannot reduce the working voltage of the target de-embedding unit.

Take the preset safe working voltage of 3V as an example for explanation: the preset voltage threshold can be set to 2.8V, which is slightly lower than the preset safe working voltage. When the working voltage of the target de-embedding unit is greater than 2.8V, the liquid to be de-embedded in the accommodating chamber of the target de-embedding unit starts to be stirred, and the working voltage of the target de-embedding unit is collected in real time. If the working voltage of the target de-embedding unit is greater than or equal to 3V, the control unit controls the target centripetal agitator to stop stirring the liquid to be de-embedded in the accommodating chamber of the target de-embedding unit, and controls the power supply module to power the target de-embedding unit in a constant voltage mode.

In some embodiments, when the control unit determines that a de-embedding unit whose working voltage is greater than or equal to a corresponding preset voltage threshold from multiple de-embedding units is a target de-embedding unit, the control unit can also control the alarm module corresponding to the target de-embedding unit in the electrochemical de-embedding tank system to sound an alarm, thereby reminding the staff to pay attention to the risk that the working voltage of the target de-embedding unit exceeds the preset safety voltage, so that when an accident occurs, the staff can deal with it in time; when the control unit monitors that the working voltage of the target de-embedding unit is less than the corresponding preset voltage threshold, the control unit can control the alarm module corresponding to the target de-embedding unit in the electrochemical de-embedding tank system to stop the alarm.

Optionally, based on the above embodiments, some embodiments may further provide a control unit, which is applied to the above electrochemical deintercalation tank system. FIG6 is a schematic diagram of the structure of a control unit provided in some embodiments. As shown in FIG6, in a possible implementation example, the control unit includes:

The power supply control module 601 is used to control the power supply module to supply power to the multiple deintercalation units of the electrochemical deintercalation tank system in a constant current mode or a constant voltage mode.

The acquisition module 602 is used to acquire the operating voltages of the multiple de-embedding units acquired by the voltage acquisition unit.

The determination module 603 is used to determine, according to the operating voltages of the multiple embedding units and the corresponding preset voltage thresholds, an embedding unit whose operating voltage is greater than or equal to the corresponding preset voltage threshold from the multiple embedding units as a target embedding unit; wherein the preset voltage threshold corresponding to each embedding unit is less than the preset safe operating voltage of each embedding unit.

The stirring control module 604 is used to control the target centripetal stirrer provided in the target de-embedding unit to stir the liquid to be de-embedded in the accommodating chamber of the target de-embedding unit to reduce the working voltage of the target de-embedding unit.

In a possible implementation example, the stirring control module 604 is further used to control the target centripetal agitator to stop stirring the liquid to be deembedded in the accommodating chamber of the target deembedded unit if it is monitored that the working voltage of the target deembedded unit is less than the corresponding preset voltage threshold; if the number of times that the working voltage of the target deembedded unit is greater than or equal to the corresponding preset voltage threshold within a preset historical time period is less than or equal to a preset number threshold, control the target centripetal agitator set in the target deembedded unit to stir the liquid to be deembedded in the accommodating chamber of the target deembedded unit; if the number of times that the working voltage of the target deembedded unit is greater than or equal to the corresponding preset voltage threshold within the preset historical time period is greater than the preset number threshold, control The target centripetal agitator is controlled to stop stirring the liquid to be deembedded in the accommodating chamber of the target deembedding unit, and the power supply module is controlled to supply power to the target deembedding unit in a constant pressure mode; if the working time of the target centripetal agitator set in the target deembedding unit is greater than or equal to the preset time, the target centripetal agitator is controlled to stop stirring the liquid to be deembedded in the accommodating chamber of the target deembedding unit, and the power supply module is controlled to supply power to the target deembedding unit in a constant pressure mode; if the working voltage of the target deembedding unit is greater than or equal to the preset safe working voltage, the target centripetal agitator is controlled to stop stirring the liquid to be deembedded in the accommodating chamber of the target deembedding unit, and the power supply module is controlled to supply power to the target deembedding unit in a constant pressure mode.

In a possible implementation example, the control unit may further include an alarm control module for controlling the alarm module corresponding to the target deintercalation unit in the electrochemical deintercalation tank system to alarm; and controlling the alarm module corresponding to the target deintercalation unit in the electrochemical deintercalation tank system to stop alarming.

The above-mentioned device is used to execute the method provided by the aforementioned embodiment. Its implementation principle and technical effect are similar to those of the method embodiment and will not be repeated here.

The above modules may be one or more integrated circuits configured to implement the above methods, such as one or more application specific integrated circuits (ASIC), or one or more digital singnal processors (DSP), or one or more field programmable gate arrays (FPGA). For another example, when a module above is implemented in the form of a processing element scheduling program code, the processing element may be a general-purpose processor, such as a central processing unit (CPU) or other processor that can call program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).

Optionally, Figure 7 is a structural schematic diagram of a processing device provided in some embodiments. As shown in Figure 7, the processing device includes: a processor 701, a storage medium 702 and a bus 703. The storage medium stores program instructions executable by the processor. When the processing device is running, the processor and the storage medium communicate through the bus, and the processor executes the program instructions to execute the steps of the electrochemical deintercalation control method provided in the above embodiments.

Optionally, this document also provides a program product, such as a storage medium, on which a computer program is stored, including a program that, when executed by a processor, executes an embodiment corresponding to the above method.

In the several embodiments provided herein, it should be understood that the disclosed devices and methods can be implemented by other For example, the device embodiments described above are merely illustrative, for example, the division of the units is merely a logical function division, and there may be other divisions in actual implementation, such as multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed may be through some interface, indirect coupling or communication connection of the device or unit, which may be electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (English: processor) to perform some steps of the method described in each embodiment of this article. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (English: Read-Only Memory, abbreviated: ROM), random access memory (English: Random Access Memory, abbreviated: RAM), disk or optical disk and other media that can store program codes.

Claims (15)

An electrochemical deintercalation control method, characterized in that it is applied to a control unit in an electrochemical deintercalation tank system, and the method comprises: Controlling the power supply module to supply power to the multiple de-embedding units of the electrochemical de-embedding tank system in a constant current mode; Acquire the operating voltages of the plurality of de-embedding units collected by a voltage collection unit; According to the working voltages of the multiple embedding units and the corresponding preset voltage thresholds, determining from the multiple embedding units an embedding unit whose working voltage is greater than or equal to the corresponding preset voltage threshold as a target embedding unit; wherein the preset voltage threshold corresponding to each embedding unit is less than a preset safe working voltage of each embedding unit, and the preset safe working voltage is a safe working voltage of each embedding unit; A target centripetal stirrer provided in the target de-embedding unit is controlled to stir the liquid to be de-embedded in the accommodating chamber of the target de-embedding unit, so as to reduce the working voltage of the target de-embedding unit. The method according to claim 1, characterized in that the method further comprises: If it is monitored that the working voltage of the target de-embedding unit is less than the corresponding preset voltage threshold, the target centripetal stirrer is controlled to stop stirring the to-be-de-embedding liquid in the accommodating chamber of the target de-embedding unit. The method according to claim 2, characterized in that the controlling the target centripetal agitator provided in the target de-embedding unit to stir the liquid to be de-embedded in the accommodating chamber of the target de-embedding unit comprises: If the number of times that the working voltage of the target deembedding unit is greater than or equal to the corresponding preset voltage threshold within a preset historical time period is less than or equal to a preset number threshold, the target centripetal agitator provided in the target deembedding unit is controlled to stir the liquid to be deembedding in the accommodating cavity of the target deembedding unit. The method according to claim 3, characterized in that the method further comprises: If the number of times that the working voltage of the target deembedding unit is greater than or equal to the corresponding preset voltage threshold within the preset historical time period is greater than the preset number threshold, the target centripetal agitator is controlled to stop stirring the liquid to be deembedding in the accommodating chamber of the target deembedding unit, and the power supply module is controlled to supply power to the target deembedding unit in a constant pressure mode; or, If the working time of the target centripetal agitator provided in the target deembedding unit is greater than or equal to the preset time, the target centripetal agitator is controlled to stop stirring the liquid to be deembedded in the accommodating chamber of the target deembedding unit, and the power supply module is controlled to supply power to the target deembedding unit in a constant pressure mode; or, If the operating voltage of the target de-embedding unit is greater than or equal to the preset safe operating voltage, the target centripetal agitator is controlled to stop stirring the liquid to be de-embedded in the accommodating chamber of the target de-embedding unit, and the power supply module is controlled to supply power to the target de-embedding unit in a constant pressure mode. The method according to claim 1, characterized in that the method further comprises: Controlling the alarm module corresponding to the target de-embedding unit in the electrochemical de-embedding tank system to sound an alarm. The method according to claim 2, characterized in that the method further comprises: Control the alarm module corresponding to the target de-embedding unit in the electrochemical de-embedding tank system to stop alarming. An electrochemical de-embedding tank system, characterized in that it comprises: an electrochemical de-embedding tank, a power supply module, a voltage collection unit, a centripetal stirrer, and a control unit; the electrochemical de-embedding tank comprises: a plurality of de-embedding units, wherein each de-embedding unit has a receiving cavity for accommodating a liquid to be de-embedded; the power supply module is connected to the wiring terminals of the plurality of de-embedding units; The input end of the voltage collection unit is connected to the wiring terminals of the plurality of embedding and de-embedding units; at least one centripetal stirrer is respectively arranged in the accommodating chamber of the plurality of embedding and de-embedding units; the output end of the voltage collection unit is connected to the control unit, and the control unit is also connected to the power supply module and each centripetal stirrer; The control unit is used to execute the electrochemical deintercalation control method described in any one of claims 1 to 6. The system of claim 7, wherein each of the deintercalation units comprises: an electrode plate pair. The system according to claim 7, characterized in that each of the de-embedding units comprises: an electrode plate group consisting of a plurality of electrode plate pairs connected in parallel. The system of claim 7, wherein each of the de-embedding units comprises: a de-embedding tank having a plurality of electrode plate groups, each electrode plate group consisting of a plurality of electrode plate pairs connected in parallel. The system as claimed in claim 7 is characterized in that the electrochemical de-embedding cell system further comprises: a plurality of alarm modules, wherein the plurality of alarm modules are connected to the control unit. The system according to any one of claims 7 to 11, characterized in that the voltage collection unit comprises: a plurality of voltage collectors, the input ends of the plurality of voltage collectors are respectively connected to the connection terminals of the plurality of de-embedding units, and the output ends of the plurality of voltage collectors are respectively connected to the control unit. A control unit, applied to the electrochemical deintercalation tank system according to any one of claims 7 to 12, the control unit comprising: A power supply control module, used to control the power supply module to supply power to the multiple de-embedding units of the electrochemical de-embedding tank system in a constant current mode or a constant voltage mode; An acquisition module, used for acquiring the operating voltages of the plurality of de-embedding units acquired by a voltage acquisition unit; A determination module, configured to determine, according to the operating voltages of the plurality of embedding units and the corresponding preset voltage thresholds, an embedding unit whose operating voltage is greater than or equal to the corresponding preset voltage threshold from the plurality of embedding units as a target embedding unit; wherein the preset voltage threshold corresponding to each embedding unit is less than a preset safe operating voltage of each embedding unit; The stirring control module is used to control the target centripetal stirrer provided in the target de-embedding unit to stir the liquid to be de-embedded in the accommodating chamber of the target de-embedding unit, so as to reduce the working voltage of the target de-embedding unit. A processing device, comprising: a processor, a storage medium and a bus, wherein the storage medium stores machine-readable instructions executable by the processor, and when the processing device is running, the processor communicates with the storage medium via the bus, and the processor executes the machine-readable instructions to perform the electrochemical deintercalation according to any one of claims 1 to 6 Steps of the control method. A storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, executes the steps of the electrochemical deintercalation control method according to any one of claims 1 to 6.