Electrode plate activation lithium removal tank and device

Abstract

The utility model discloses a polar plate activation lithium removal tank and device, and relates to the technical field of polar plate preparation devices, the polar plate activation lithium removal tank and device comprise a tank body, the tank body is internally provided with a cavity capable of enabling a polar plate to be vertically placed, and the width of the cavity is matched with the width of a single polar plate; a plurality of liquid inlets are formed in one end of the cavity in the length direction of the cavity, openings of the liquid inlets face the other end of the cavity, and a plurality of liquid outlets are formed in the other end of the cavity. According to the polar plate activation lithium removal tank and the polar plate activation lithium removal device, the polar plate can be directly inserted into the cavity, the polar plate inserted into the cavity can be vertically placed, and the liquid inlet and the liquid outlet in the cavity respectively face the end side of the polar plate in the thickness direction; the oxidizing agent flowing in the chamber can fully scour the planes on the two sides of the polar plate, so that lithium ions of the polar plate are removed.

Description

Technical Field

[0001] The utility model relates to the technical field of pole plate preparation devices, in particular to a pole plate activation lithium removal tank and a device. Background Art

[0002] With the development of the lithium battery industry, the supply of lithium resources is becoming less optimistic. Although my country has abundant lithium resources, most of them are found in salt lake brine. Therefore, the efficient development and utilization of my country's salt lake lithium resources is imperative. In recent years, the electrochemical deintercalation method has been widely used in salt lake lithium extraction due to its low cost, good selectivity, green and high efficiency.

[0003] The electrochemical deintercalation method is to achieve the insertion and removal of lithium ions in the electrode plate by adjusting the potential. The extraction and enrichment of lithium ions can be achieved simultaneously in the process. For the electrochemical deintercalation method, the preparation and performance of the electrode plate, especially the preparation of the cathode FePO4 electrode, are directly related to the lithium extraction effect and efficiency of the entire electrochemical system. At present, the preparation of FePO4 electrodes is generally carried out by the activation delithiation method. The process can be regarded as an oxidation reaction. Through the action of the oxidant, the ferrous ions in the LiFePO4 material are oxidized to ferric ions, so that the lithium ions are removed from the material lattice to obtain the FePO4 electrode material.

[0004] Sodium persulfate can be used as an oxidant to activate and delithiate the LiFePO4 electrode plate by generating active free radicals, thereby preparing the FePO4 cathode plate. However, the current process of plate activation and delithiation lacks a dedicated container. The more common practice is to use a water basin as a container and place the plate flat in the water basin. However, a single water basin occupies a large area. When using a water basin as a container for plate activation and delithiation, only one plate can be delithiated at a time, which is extremely inefficient. Moreover, the plate in the water basin is placed flat, and the solution is easily offset when flushing the plate, resulting in uneven delithiation, which affects the subsequent lithium ion deintercalation effect. Utility Model Content

[0005] The utility model aims to provide a plate activation delithiation tank and device, so as to solve the problem of uneven plate delithiation caused by using a water basin as a container due to lack of a special container in the existing plate activation delithiation process.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A plate activation and delithiation cell comprises a cell body, wherein a chamber is provided in the cell body for placing the plate upright, and the width of the chamber matches the width of a single plate; along the length direction of the chamber, one end of the chamber is provided with a plurality of liquid inlets arranged at intervals along the depth direction of the chamber, the opening of the liquid inlet faces the other end of the chamber, and the other end of the chamber is provided with a plurality of liquid outlets arranged at intervals along the depth direction of the chamber.

[0008] In some embodiments, an injection pipe extending into the chamber is provided in the chamber, and at least two rows of liquid inlets arranged along the depth direction of the chamber are provided on the injection pipe, and the opening directions of the two rows of liquid inlets are angled with each other in the horizontal direction.

[0009] In some embodiments, the number of liquid inlets in each column is equal, and the liquid inlets in the same column are spaced at the same distance.

[0010] In some embodiments, the liquid inlets in the same row are located on the same straight line in the vertical direction.

[0011] In some embodiments, there are multiple slots, which are arranged side by side, and the chambers in each slot are independent of each other.

[0012] Based on the aforementioned plate activation delithiation tank, the utility model also provides a plate activation delithiation device, which includes the aforementioned plate activation delithiation tank and a circulation pump, multiple liquid inlets are commonly connected to the outlet of the circulation pump, and multiple liquid outlets are commonly connected to the inlet of the circulation pump; a liquid outlet valve is arranged between each liquid outlet and the inlet of the circulation pump.

[0013] In some embodiments, a water flow indicator for observing water flow is provided between at least one liquid outlet and the inlet of the circulation pump.

[0014] In some embodiments, the outlet of the circulation pump is provided with an outlet valve for controlling the flow rate.

[0015] Compared with the prior art, the plate activation lithium removal tank and device implemented by the utility model have the following beneficial effects:

[0016] (1) The electrode plate activation and de-lithiation tank is designed to directly insert the electrode plate into the chamber through the structural design of the chamber, and the electrode plate inserted into the chamber can be placed upright, so that the liquid inlet and the liquid outlet in the chamber are respectively facing the end sides of the electrode plate in the thickness direction. After such a design, when the oxidant enters the chamber through the liquid inlet and flows toward the liquid outlet, the oxidant flowing in the chamber can fully flush the planes on both sides of the electrode plate and fully react with the electrode plate to release the lithium ions from the electrode plate;

[0017] (2) The plate activation and delithiation tank is designed with a liquid inlet and a liquid outlet. After the oxidant enters the chamber through a plurality of liquid inlets arranged along the depth direction of the chamber, it can flow out of the chamber through a plurality of liquid outlets arranged along the depth direction of the chamber, so that the oxidant flowing in the chamber forms a uniform laminar flow, and evenly flushes the planes on both sides of the plate.

[0018] (3) The plate activation and delithiation device uses a liquid outlet valve and a water flow indicator to observe and control the flow of the fluid at the liquid outlet, and then adjusts the flow rate of the oxidant based on the circulation pump and the outlet valve to adjust the plate delithiation efficiency, thereby meeting the delithiation requirements of plates of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a plate activation and lithium removal tank in an embodiment of the utility model;

[0020] Figure 2 yes Figure 1 A magnified view of the layout of the middle A;

[0021] Figure 3 It is a schematic diagram of the injection pipe in the embodiment of the utility model;

[0022] Figure 4 It is a schematic diagram of a plate activation and lithium removal tank with multiple tank bodies in an embodiment of the utility model;

[0023] Figure 5 It is a connection schematic diagram of the plate activation and delithiation device in the embodiment of the utility model.

[0024] In the figure, 1, tank body; 2, chamber; 20, immersion area; 21, detection area; 3, injection pipe; 4, liquid inlet; 5, liquid outlet; 6, circulation pump; 7, outlet valve; 8, liquid outlet valve; 9, water flow indicator; 10, quick connector; 11, nozzle pipe clamp; 12, fixed bracket; 13, flow meter; 100, plate activation and delithiation tank. DETAILED DESCRIPTION

[0025] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] In the description of the present utility model, it should be understood that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. The terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0027] In the description of the present invention, it should be understood that the terms "height", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the description of the present invention, it should be understood that the terms "first" and "second" are used in the present invention for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0029] like Figure 1-5 As shown, a plate activation and delithiation tank 100 of a preferred embodiment of the utility model comprises a fixing bracket 12 and a tank body 1, wherein a mounting position (not shown in the figure) matching the outer contour of the tank body 1 is provided in the fixing bracket 12, and the tank body 1 is embedded in the mounting position and fixed in position by the fixing bracket 12. A chamber 2 is provided in the tank body 1, wherein the width of the chamber 2 matches the width of a single plate, so that the plate can enter the chamber 2 only from the end side in the width direction, and the plate entering the chamber 2 is clamped by the inner wall of the chamber 2, so that the plate is placed upright in the chamber 2.

[0030] In coordination with the placement of the electrode plate, a soaking area 20 and a detection area 21 arranged in the vertical direction can be formed in the chamber 2, wherein the soaking area 20 is located below the detection area 21, and the oxidant flows in the soaking area 20. According to the specifications of the electrode plate, the height of the soaking area 20 in the vertical direction is arranged so that the uncoated part of the vertically placed electrode plate can be higher than the liquid level inside the chamber 2, so that the external electrochemical workstation can clamp the uncoated part of the electrode plate through the electrode clamp, thereby connecting and monitoring the electrode plate, and realizing online monitoring of the electrode plate activation and delithiation process.

[0031] like Figure 1 , 5 As shown, in this embodiment, along the length direction of the chamber 2, one end of the chamber 2 is provided with a spray pipe 3 extending into the chamber 2 along the depth direction of the chamber 2, and the spray pipe 3 is fixed to the fixing bracket 12 through the spray pipe clamp 11. The spray pipe 3 is provided with two rows of liquid inlets 4 arranged along the depth direction of the chamber 2, and the openings of the liquid inlets 4 face the other end of the chamber 2. The liquid inlets 4 in the same row are on the same straight line in the vertical direction, and the openings of the two rows of liquid inlets 4 form an angle with each other in the horizontal direction. The other end of the chamber 2 is provided with a plurality of liquid outlets 5 arranged at intervals along the depth direction of the chamber 2.

[0032] The liquid inlets 4 in the same row are on the same straight line in the vertical direction, and the openings of the two rows of liquid inlets 4 are angled to each other in the horizontal direction, that is, the two rows of liquid inlets 4 are arranged along the circumference of the injection tube 3, so that the oxidants injected through the two rows of liquid inlets 4 can enter the interior of the chamber 2 synchronously and have different flow directions. After the oxidants enter the interior of the chamber 2, the oxidants with different flow directions can flush multiple positions inside the chamber 2. Preferably, the openings of the two rows of liquid inlets 4 are respectively oriented to both sides of the central axis of the injection tube 3, so that the oxidants injected into the chamber 2 through the liquid inlets 4 have flow directions that are angled to each other, and the oxidants can flow downstream to the two side planes of the electrode plate.

[0033] It should be noted that, in other embodiments, multiple rows of liquid inlets 4 can be arranged on the injection pipe 3, and the multiple rows of liquid inlets 4 can be arranged in sequence in the circumferential direction of the injection pipe 3. It is only necessary to ensure that the opening of the liquid inlet 4 is facing the other end of the chamber 2, so that the oxidant injected into the chamber 2 through the liquid inlet 4 can flush the electrode plates in the chamber 2 downstream.

[0034] In some embodiments, Figure 3 As shown, the number of liquid inlets 4 in each column on the injection pipe 3 is equal, and the interval distance of the liquid inlets 4 in each column is the same, so that when the oxidant is injected into the chamber 2 through the liquid inlet 4, a relatively uniform flow layer structure can be formed inside the chamber 2. When the electrode plate is placed upright inside the chamber 2, the relatively uniform flow layer structure inside the chamber 2 can evenly flush the planes on both sides of the electrode plate, so that the oxidant fully reacts with the planes on both sides of the electrode plate, and the lithium ions on the screens on both sides of the electrode plate are fully released.

[0035] like Figure 4 As shown, according to the requirements of plate delithiation, the plate activation delithiation tank 100 can have multiple tank bodies 1, which are arranged side by side in a fixed bracket 12, and the chambers 2 in each tank body 1 are independent of each other. In this way, multiple plates can be activated and delithiated at the same time, and each plate can be fully contacted and reacted with the oxidant in the chamber 2, so that the lithium ions in the plate can be fully released, avoiding the situation where multiple plates are close to each other and causing uneven lithium ion release.

[0036] Based on the aforementioned plate activation delithiation tank 100, this embodiment further provides a plate activation delithiation device, such as Figure 5 As shown, it includes the aforementioned plate activation and lithium removal tank 100, and a circulation pump 6, wherein:

[0037] The plurality of liquid inlets 4 are commonly connected to the outlet of the circulation pump 6, and the outlet of the circulation pump 6 is provided with an outlet valve 7 for controlling the flow rate, and a flow meter 13 for displaying the outlet flow rate of the circulation pump 6;

[0038] A plurality of liquid outlets 5 are commonly connected to the inlet of the circulation pump 6, and a liquid outlet valve 8 is provided between each liquid outlet 5 and the inlet of the circulation pump 6. The liquid outlet valve 8 is used to control the fluid flow rate discharged from each liquid outlet 5 so that the fluid flow rate discharged from each liquid outlet 5 is balanced with the fluid flow rate flowing into the liquid inlet 4, so that the oxidant flowing inside the chamber 2 can maintain a laminar flow structure after flowing into the chamber 2 from the liquid inlet 4. In the present embodiment, a water flow indicator 9 for observing the water flow movement is provided between each liquid outlet 5 and the inlet of the circulation pump 6.

[0039] After the plate is placed in the chamber 2 of the plate activation and delithiation tank 100, the plate is arranged upright inside the chamber 2 and immersed in the oxidant. The circulation pump 6 is turned on, and the circulation pump 6 extracts the oxidant in the chamber 2, so that the oxidant flows out of the chamber 2 through the liquid outlet 5, and returns to the liquid inlet 4 of the injection pipe 3 through the inlet and outlet of the circulation pump 6, and is injected into the chamber 2 through the liquid inlet 4. During the process of plate activation and delithiation, the oxidant will maintain the above-mentioned circulation process, flush the plate in the chamber 2, and fully remove the lithium ions on the plate.

[0040] During the circulation of the oxidant, the flow rate of the oxidant entering the chamber 2 through the liquid inlet 4 and the flow rate of the oxidant leaving the chamber 2 through the liquid outlet 5 can be kept consistent through the cooperation of the liquid outlet valve 8, the water flow indicator 9, and the outlet valve 7. Combined with the interval arrangement of the liquid inlet 4 and the liquid outlet 5 along the depth direction of the chamber 2, the flow situation of the oxidant inside the chamber 2 is generally uniform laminar flow. In the depth direction of the chamber 2, the flow velocity and flow direction of the oxidant are basically the same, so that the two side planes of the electrode plate located in the chamber 2 can be evenly flushed, thereby ensuring that the lithium desorption efficiency of the two side planes of the electrode plate is the same, and the two side planes of the electrode plate can complete the lithium desorption in basically the same time period, avoiding uneven lithium ion desorption on the two side planes of the electrode plate.

[0041] In addition, in order to replace the oxidant of the present plate activation and delithiation device, in the present embodiment, a detachable quick connector 10 can be provided upstream of the injection pipe 3, that is, the end side where the injection pipe 3 is connected to the outlet of the circulation pump 6. By removing the quick connector 10, the circulation path of the oxidant is disconnected, thereby discharging the oxidant circulating in the present plate activation and delithiation device.

[0042] In summary, the embodiment of the utility model provides a plate activation and delithiation tank 100, which, through the structural design of the chamber 2, enables the plate to be directly inserted into the chamber 2, and the plate inserted into the chamber 2 can be placed upright, so that the liquid inlet 4 and the liquid outlet 5 in the chamber 2 are respectively opposite to the end sides of the thickness direction of the plate. After such design, when the oxidant enters the chamber 2 through the liquid inlet 4 and flows toward the liquid outlet 5, the oxidant flowing in the chamber 2 can fully flush the planes on both sides of the plate, fully react with the plate, and release the lithium ions of the plate. Moreover, the plate activation and delithiation tank 100 is designed with the liquid inlet 4 and the liquid outlet 5. After the oxidant enters the chamber 2 through the liquid inlet 4, it can flow out of the chamber 2 synchronously through multiple liquid outlets 5, so that the oxidant flowing in the chamber 2 forms a uniform laminar flow, and the planes on both sides of the plate are uniformly flushed. In addition, the embodiment of the utility model also provides a plate activation and delithiation device, which observes and controls the flow of fluid at the liquid outlet 5 through the liquid outlet valve 8 and the water flow indicator 9, and then adjusts the flow rate of the oxidant based on the circulation pump 6 and the outlet valve 7, thereby adjusting the delithiation efficiency of the plate, thereby meeting the delithiation requirements of plates of different specifications.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A plate activation and lithium removal tank, It is characterized in that The invention comprises a trough body (1), wherein a chamber (2) is arranged inside the trough body (1) for placing an electrode plate upright, and the width of the chamber (2) matches the width of a single electrode plate; along the length direction of the chamber (2), one end of the chamber (2) is provided with a plurality of liquid inlets (4) arranged at intervals along the depth direction of the chamber (2), the opening of the liquid inlet (4) faces the other end of the chamber (2), and the other end of the chamber (2) is provided with a plurality of liquid outlets (5) arranged at intervals along the depth direction of the chamber (2).

2. The plate activation and lithium removal tank according to claim 1, It is characterized in that The chamber (2) is provided with an injection pipe (3) extending into the chamber (2), and the injection pipe (3) is provided with at least two rows of liquid inlets (4) arranged along the depth direction of the chamber (2), and the opening directions of the two rows of liquid inlets (4) are angled with each other in the horizontal direction.

3. The plate activation and delithiation tank according to claim 2, It is characterized in that The number of the liquid inlets (4) in each column is equal, and the intervals between the liquid inlets (4) in the same column are the same.

4. The plate activation and delithiation tank according to claim 2 or 3, It is characterized in that The liquid inlets (4) in the same row are located on the same straight line in the vertical direction.

5. The plate activation and delithiation tank according to claim 1, It is characterized in that There are a plurality of the trough bodies (1), the plurality of the trough bodies (1) are arranged side by side, and the chambers (2) in each of the trough bodies (1) are independent of each other.

6. The plate activation and delithiation tank according to claim 1, It is characterized in that A soaking area (20) and a detection area (21) arranged in a vertical direction are formed in the chamber (2), and the soaking area (20) is located below the detection area (21).

7. A plate activation and delithiation device, It is characterized in that It comprises the plate activation delithiation tank (100) as described in any one of claims 1 to 6, and a circulation pump (6), wherein a plurality of liquid inlets (4) are commonly connected to the outlet of the circulation pump (6), and a plurality of liquid outlets (5) are commonly connected to the inlet of the circulation pump (6); and a liquid outlet valve (8) is provided between each of the liquid outlets (5) and the inlet of the circulation pump (6).

8. The plate activation and delithiation device according to claim 7, It is characterized in that A water flow indicator (9) for observing the movement of water flow is provided between at least one of the liquid outlets (5) and the inlet of the circulation pump (6).

9. The plate activation and delithiation device according to claim 7, It is characterized in that The outlet of the circulation pump (6) is provided with an outlet valve (7) for controlling the flow rate.

10. The plate activation and delithiation device according to claim 7, It is characterized in that A detachable quick connector (10) is provided upstream of the injection pipe (3).

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