A filter device

Abstract

The utility model discloses a filter device relates to electrolyte filtration technical field. The filter device includes: first tubular casing, including first connecting end and second connecting end, first connecting end communicates with liquid outlet, second tubular casing, including third connecting end and fourth connecting end, fourth connecting end communicates with electrolyte delivery pipeline, be provided with annular connecting protrusion on second connecting end, be provided with annular connecting groove on third connecting end, second connecting end and third connecting end are screwed, first tubular casing and second tubular casing combination form filter drum, first filter piece, second filter piece and third filter piece are located in the inside of filter drum along the first direction, all be provided with a plurality of filter holes on first filter piece, second filter piece and third filter piece, in the first direction, the aperture of filter hole decreases gradually. The filter device is used to improve the filtration effect to electrolyte and guarantee the conveying efficiency of electrolyte, and the cleaning of filter piece is convenient.

Description

Technical Field

[0001] This utility model relates to the field of electrolyte filtration technology, and in particular to a filtration device. Background Technology

[0002] Electrolyte is the core medium for ion transport in various chemical power sources (especially secondary batteries), and its purity directly affects the battery's capacity, cycle life, and safety. After production and filling, electrolytes are typically stored in sealed containers. However, during filling, storage, or handling, solid impurities may still be introduced or generated. These mainly include: environmental pollutants, such as dust in the air and particles introduced when the container lid is opened; container-related impurities, such as debris from wear on the inner wall of the container and tiny particles from aging and detaching seals; and electrolyte precipitates, such as particles produced by the decomposition of lithium salts with trace amounts of moisture, or crystalline particles from some additives at low temperatures. If these solid impurities enter the battery along with the electrolyte, they may puncture the separator, causing an internal short circuit and resulting in battery overheating, fire, and other safety hazards. Even without a short circuit, impurities will adhere to the electrode surface, hindering ion migration and leading to battery capacity decay and reduced cycle performance. Therefore, a filtration device should be installed at the electrolyte outlet where it is transferred from the packaging container to the downstream process.

[0003] In existing technologies, some electrolyte packaging containers have simple filtration structures at their outlets, such as a single filter screen or filter cartridge. However, the filtration precision is not matched to the flow rate. If a high-precision filter screen is used, it is prone to clogging due to the rapid accumulation of impurities, reducing the dispensing efficiency. If a low-precision filter screen is used, it cannot intercept tiny particles, still posing a safety risk. In addition, cleaning the filter screen or filter cartridge in existing filtration structures is inconvenient.

[0004] Therefore, there is an urgent need for a filtration device to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a filtration device that improves the filtration effect of electrolyte and ensures the electrolyte delivery efficiency, while also facilitating the cleaning of the filter element.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This utility model provides a filtration device for filtering electrolyte flowing from the outlet of an electrolyte packaging container. The filtration device includes a first tubular shell, a second tubular shell, a first filter element, a second filter element, and a third filter element. The first tubular shell includes a first connecting end and a second connecting end; the first connecting end communicates with the outlet. The second tubular shell includes a third connecting end and a fourth connecting end; the fourth connecting end communicates with an electrolyte delivery pipeline. An annular connecting protrusion is provided on the end face of the second connecting end; an annular connecting groove is formed on the end face of the third connecting end; the outer diameter of the annular connecting protrusion matches the inner diameter of the annular connecting groove; a first threaded portion is provided on the outer peripheral wall of the annular connecting protrusion; a second threaded portion is provided on the inner side wall of the annular connecting groove; the second connecting end passes through the first... A threaded portion and a second threaded portion are threadedly connected to the third connecting end; the first tubular shell and the second tubular shell are combined to form a filter cylinder; a first filter element, a second filter element, and a third filter element are arranged at intervals inside the filter cylinder along a first direction; the first direction is the flow direction of the electrolyte; the first filter element, the second filter element, and the third filter element are each provided with a plurality of filter holes; in the first direction, the diameter of the filter holes on the first filter element, the diameter of the filter holes on the second filter element, and the diameter of the filter holes on the third filter element decrease sequentially.

[0008] In some embodiments, the diameters of the first filter element, the second filter element, and the third filter element are equal, and the distance between the first filter element and the second filter element is equal to the distance between the second filter element and the third filter element; the ratio of the distance between two adjacent filter elements to the diameter of the first filter element, the second filter element, or the third filter element is in the range of 0.6 to 0.8.

[0009] In some embodiments, the porosity of the first filter element ranges from 30% to 40%; the porosity of the second filter element ranges from 20% to 30%; and the porosity of the third filter element ranges from 10% to 20%.

[0010] In some embodiments, an annular sealing groove is further provided on the end face of the second connecting end, and the annular sealing groove surrounds the annular connecting protrusion; an annular sealing protrusion is further provided on the end face of the third connecting end, and the annular sealing protrusion surrounds the annular connecting groove; the annular sealing protrusion is adapted to the annular sealing groove.

[0011] In some embodiments, a flexible sealing ring is provided between the inner wall of the annular sealing groove and the outer wall of the annular sealing protrusion.

[0012] In some embodiments, the filtration device further includes a flow rate monitoring module disposed downstream of the third filter element, which is capable of collecting and displaying the flow rate information of the electrolyte.

[0013] In some embodiments, the filtration device further includes an alarm component disposed on the outside of the filter cartridge; the alarm component is coupled to the flow rate monitoring module; when the flow rate information collected by the flow rate monitoring module is less than a preset flow rate information, the flow rate monitoring module can send a first electrical signal to the alarm component; the alarm component can trigger an alarm action after receiving the first electrical signal.

[0014] In some embodiments, the first connection end is connected to the liquid outlet via a first control valve; the filtration device further includes a control module, which is coupled to the flow rate monitoring module and the first control valve respectively; when the flow rate information collected by the flow rate monitoring module is less than the preset flow rate information, the flow rate monitoring module can send a second electrical signal to the control module; after receiving the second electrical signal, the control module can control the first control valve to close.

[0015] In some embodiments, the fourth connection terminal is connected to the electrolyte delivery pipeline via a second control valve; the control module is coupled to the second control valve; after receiving the second electrical signal, the control module can simultaneously control the closure of the first control valve and the second control valve.

[0016] In some embodiments, the fourth connection terminal is connected to the electrolyte delivery pipeline via a second control valve; the control module is coupled to the second control valve; after receiving the second electrical signal, the control module can control the first control valve to close, and after a preset time, control the second control valve to close.

[0017] The beneficial effects of this utility model are:

[0018] This utility model provides a filtration device, which consists of a first tubular shell connected to the outlet of an electrolyte packaging container and a second tubular shell connected to an electrolyte delivery channel. The other ends of the first and second tubular shells are connected by threads to form a filter cylinder. This design ensures a tight seal between the first and second tubular shells while allowing for detachable connection. When cleaning the filter element inside either the first or second tubular shell is required, it can be disassembled by rotating either shell, enabling cleaning of the filter element. The operation is simple and convenient. In addition, a first filter element, a second filter element, and a third filter element are sequentially arranged inside the filter barrel formed by the combination of the first tubular shell and the second tubular shell along the flow direction of the electrolyte. This avoids the problem of having too many filter elements, which would affect the flow efficiency of the electrolyte, and also avoids the problem of having too few filter elements, which would affect the filtration effect of the electrolyte. Furthermore, the pore diameter of the filter holes on the three filter elements is set to decrease in the direction of electrolyte flow. This allows for the step-by-step filtration of large-diameter impurities and small-diameter impurities, ensuring the filtration effect, while also avoiding affecting the flow efficiency of the electrolyte, thereby ensuring the electrolyte delivery efficiency. Attached Figure Description

[0019] Figure 1 This is a structural diagram of a filtration device provided in a specific embodiment of this utility model.

[0020] In the picture:

[0021] 1. First tubular shell; 2. Second tubular shell; 3. First filter element; 4. Second filter element; 5. Third filter element; 6. Flow rate monitoring module; 7. Alarm assembly; 8. Control module; 91. First control valve; 92. Second control valve; 10. Liquid outlet; 20. Electrolyte delivery pipeline;

[0022] X1, first direction. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0024] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0027] like Figure 1 As shown, this embodiment provides a filtration device for filtering the electrolyte flowing out of the outlet 10 of the electrolyte packaging container. The filtration device includes: a first tubular shell 1, a second tubular shell 2, a first filter element 3, a second filter element 4, and a third filter element 5.

[0028] The first tubular shell 1 includes a first connecting end and a second connecting end, wherein the first connecting end of the first tubular shell 1 is connected to the outlet 10 of the electrolyte packaging container. The second tubular shell 2 includes a third connecting end and a fourth connecting end, wherein the fourth connecting end of the second tubular shell 2 is connected to the electrolyte delivery pipeline 20. The electrolyte flowing out of the outlet 10 of the electrolyte packaging container can flow sequentially through the first tubular shell 1 and the second tubular shell 2 into the electrolyte delivery pipeline 20.

[0029] An annular connecting protrusion is provided on the end face of the second connecting end of the first tubular housing 1, and correspondingly, an annular connecting groove is provided on the end face of the third connecting end of the second tubular housing 2. The outer diameter of the annular connecting protrusion is matched (i.e., equal) to the inner diameter of the annular connecting groove. Furthermore, a first threaded portion is provided on the outer peripheral wall of the annular connecting protrusion, that is, an external thread is provided on the outer peripheral wall of the annular connecting protrusion, and a second threaded portion is provided on the inner side wall of the annular connecting groove, that is, an internal thread is provided on the inner side wall of the annular connecting groove. The second connecting end of the first tubular housing 1 is threadedly connected to the third connecting end of the second tubular housing 2 through the first threaded portion and the second threaded portion. It is easy to understand that the first threaded portion and the second threaded portion should be matched, that is, the thread profile, pitch (or lead), nominal diameter, thread direction, and thread accuracy grade of the first threaded portion and the second threaded portion should be the same. In this way, the first tubular housing 1 can achieve a threaded connection with the second tubular housing 2. The first tubular shell 1 and the second tubular shell 2 are combined to form a filter cylinder.

[0030] like Figure 1 As shown, the first filter element 3, the second filter element 4, and the third filter element 5 are sequentially disposed along a first direction X1 inside the filter cylinder formed by the combination of the first tubular shell 1 and the second tubular shell 2, where the first direction X1 is the flow direction of the electrolyte. Multiple filter holes are provided on the first filter element 3, the second filter element 4, and the third filter element 5. Along the first direction X1, the diameter of the filter holes on the first filter element 3, the second filter element 4, and the third filter element 5 decreases sequentially.

[0031] Therefore, the filtration device provided in this embodiment has a first tubular housing 1 connected to the outlet 10 of the electrolyte packaging barrel, and a second tubular housing 2 connected to the electrolyte delivery channel. The other end of the first tubular housing 1 and the other end of the second tubular housing 2 are connected by threads to form a filter cylinder. This can achieve a detachable connection between the first tubular housing 1 and the second tubular housing 2 while ensuring the sealing performance between them. When it is necessary to clean the filter element inside the first tubular housing 1 or the second tubular housing 2, the filter element can be disassembled by rotating one of them. The operation steps are simple and convenient to use. In addition, a first filter element 3, a second filter element 4, and a third filter element 5 are sequentially arranged inside the filter barrel formed by the combination of the first tubular shell 1 and the second tubular shell 2 along the flow direction of the electrolyte. This avoids the problem of too many filter elements affecting the flow efficiency of the electrolyte, while also avoiding the problem of too few filter elements affecting the filtration effect of the electrolyte. Furthermore, the pore diameter of the filter holes on the three filter elements is set to decrease in the direction of electrolyte flow. This allows for the step-by-step filtration of both large-diameter and small-diameter impurities, ensuring the filtration effect while avoiding affecting the flow efficiency of the electrolyte, thereby ensuring the electrolyte delivery efficiency.

[0032] In some embodiments, the diameters of the first filter element 3, the second filter element 4, and the third filter element 5 are equal, and the distance between the first filter element 3 and the second filter element 4 is equal to the distance between the second filter element 4 and the third filter element 5. The ratio of the distance between two adjacent filter elements to the diameter of the first filter element 3, the second filter element 4, or the third filter element 5 ranges from 0.6 to 0.8. Taking the distance between two adjacent filter elements as L1 and the diameter of the first filter element 3, the second filter element 4, or the third filter element 5 as D1, for example, the ratio is 0.6, i.e., L1:D1=0.6; or 0.65, i.e., L1:D1=0.65; or 0.7, i.e., L1:D1=7; or 0.75, i.e., L1:D1=0.75; or 0.8, i.e., L1:D1=0.8. By setting the ratio of the diameter of the first filter element 3, the second filter element 4, or the third filter element 5 to the distance between two adjacent filter elements to a range of 0.6 to 0.8, the flow efficiency of the electrolyte and the filtration effect of the electrolyte can be kept within a good range. This avoids the situation where the ratio is too small, resulting in a narrow flow channel space between two adjacent filter elements, which increases the flow resistance of the electrolyte and affects the flow efficiency. At the same time, it avoids the situation where the ratio is too large, resulting in a wide flow channel space between two adjacent filter elements, which can easily lead to local flow field "dead zones" and electrolyte stagnation, which not only reduces the filtration efficiency but may also cause secondary contamination by impurities, affecting the filtration effect.

[0033] In some embodiments, the porosity of the first filter element 3 ranges from 30% to 40%. For example, the porosity of the first filter element 3 is 30%; or 32.5%; or 35%; or 37.5%; or 40%.

[0034] The porosity of the second filter element 4 ranges from 20% to 30%. For example, the porosity of the second filter element 4 is 20%; or 22.5%; or 25%; or 27.5%; or 30%.

[0035] The porosity of the third filter element 5 ranges from 10% to 20%. For example, the porosity of the third filter element 5 is 10%; or 12.5%; or 15%; or 17.5%; or 20%.

[0036] With the above settings, the porosity of the first filter element 3, the second filter element 4, and the third filter element 5 can be within a better range, so that the porosity is matched with the filtration accuracy. While ensuring the filtration effect, the impact on the electrolyte flow efficiency and the structural strength of the filter element can be reduced.

[0037] In some embodiments, an annular sealing groove is further provided on the end face of the second connecting end of the first tubular housing 1, and the annular sealing groove surrounds the annular connecting protrusion. An annular sealing protrusion is further provided on the end face of the third connecting end, and the annular sealing protrusion surrounds the annular connecting groove. The annular sealing protrusion here is adapted to the annular sealing groove. Through the above arrangement, the contact area between the second connecting end and the third connecting end can be increased, thereby extending the leakage path and increasing the resistance to liquid flow. At the same time, multiple sealing barriers are formed between the outer wall of the annular sealing protrusion and the inner wall of the annular sealing groove (that is, the "face contact" between the top of the protrusion and the bottom of the groove can form a sealing barrier, and the "side contact" between the side of the protrusion and the inner wall of the groove can also form a sealing barrier), which greatly improves the sealing performance between the first tubular housing 1 and the second tubular housing 2, avoids leakage during the use of the filter device, and improves the reliability of the filter device.

[0038] In some embodiments, a flexible sealing ring is provided between the inner wall of the annular sealing groove and the outer wall of the annular sealing protrusion. This flexible sealing ring is, for example, a rubber sealing ring. By this arrangement, the flexible sealing ring can fill the minute gap between the inner wall of the annular sealing groove and the outer wall of the annular sealing protrusion, further improving the sealing performance between the first tubular housing 1 and the second tubular housing 2.

[0039] In some embodiments, such as Figure 1 As shown, the aforementioned filtration device also includes a flow rate monitoring module 6, located downstream of the third filter element 5, capable of collecting and displaying the electrolyte flow rate information. This flow rate monitoring module 6 includes a flow rate sensor and a display component connected to the flow rate sensor. The flow rate sensor can be, for example, a turbine flow meter or an ultrasonic flow meter, and the display component can be, for example, an LED digital display or an LCD digital display. This configuration allows for a direct understanding of the electrolyte flow rate downstream of the filtration device, enabling the determination of whether the filter element is clogged. This facilitates timely cleaning of the filter element by personnel, improving the practicality of the aforementioned filtration device.

[0040] In some embodiments, such as Figure 1As shown, the aforementioned filtration device also includes an alarm component 7. This alarm component 7 is located on the outside of the first tubular housing 1 or the second tubular housing 2. The alarm component 7 is coupled to the flow rate monitoring module 6, and this coupling includes both electrical and signal connections. When the flow rate information collected by the flow rate monitoring module 6 is less than a preset flow rate, the flow rate monitoring module 6 can send a first electrical signal to the alarm component 7, and the alarm component 7 can trigger an alarm upon receiving the first electrical signal. The alarm component 7 can be, for example, a buzzer or an indicator light. With this configuration, when the filter element in the filtration device becomes clogged, the alarm component 7 can provide a timely and clear warning, allowing staff to clean the filter element promptly, further improving the practicality of the aforementioned filtration device.

[0041] In some embodiments, such as Figure 1 As shown, the first connecting end of the first tubular housing 1 is connected to the liquid outlet 10 via a first control valve 91. This first control valve 91 is, for example, an electric ball valve or an electric butterfly valve. The filtration device also includes a control module 8, which is, for example, a programmable logic controller (PLC) or an ARM microcontroller. This control module 8 is coupled to both the flow rate monitoring module 6 and the first control valve 91; this coupling includes both electrical and signal connections. When the flow rate information collected by the flow rate monitoring module 6 is less than a preset flow rate information, the flow rate monitoring module 6 can send a second electrical signal to the control module 8; upon receiving the second electrical signal, the control module 8 can control the first control valve 91 to close. With this configuration, when the filter element becomes clogged, the control module 8 can control the first control valve 91 to close, thereby preventing the electrolyte from continuously flowing into the filtration device and worsening the clogging, further improving the practicality of the filtration device.

[0042] In some embodiments, such as Figure 1 As shown, the fourth connection end of the second tubular housing 2 is connected to the electrolyte delivery pipeline 20 via a second control valve 92. This second control valve 92 is, for example, an electric ball valve or an electric butterfly valve. The control module 8 is coupled to the second control valve 92, and this coupling includes both electrical and signal connections. When the control module 8 receives a second electrical signal, it can simultaneously control the first control valve 91 and the second control valve 92 to close. With this configuration, when the filter element becomes clogged, the control module 8 can control the first control valve 91 to close, thereby preventing electrolyte from continuously flowing into the filter and worsening the clogging. Simultaneously, it reduces the probability of electrolyte in the electrolyte delivery pipeline 20 flowing back into the filter when the filter is horizontally positioned, further improving the practicality of the filter.

[0043] In some embodiments, such as Figure 1As shown, the fourth connection end of the second tubular housing 2 is connected to the electrolyte delivery pipeline 20 via the second control valve 92. The control module 8 is coupled to the second control valve 92, and this coupling includes electrical connection and signal connection. When the control module 8 receives the second electrical signal, it can control the first control valve 91 to close, and after a preset time, it controls the second control valve 92 to close. With this setting, when the filter element becomes clogged, the control module 8 can control the first control valve 91 to close, thereby preventing the electrolyte from continuously flowing into the filter device and aggravating the clogging. At the same time, when the filter device is set vertically (with the electrolyte delivery pipeline 20 located below the filter device), the residual electrolyte in the filter device can flow out, facilitating subsequent cleaning work and further improving the practicality of the filter device.

[0044] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A filtration device for filtering electrolyte flowing from the outlet (10) of an electrolyte packaging container; characterized in that, include: The first tubular shell (1) includes a first connecting end and a second connecting end; the first connecting end is connected to the liquid outlet (10); The second tubular shell (2) includes a third connecting end and a fourth connecting end; the fourth connecting end is connected to the electrolyte delivery pipeline (20); An annular connecting protrusion is provided on the end face of the second connecting end; an annular connecting groove is provided on the end face of the third connecting end; the outer diameter of the annular connecting protrusion is adapted to the inner diameter of the annular connecting groove; a first threaded portion is provided on the outer peripheral wall of the annular connecting protrusion; a second threaded portion is provided on the inner side wall of the annular connecting groove; the second connecting end is threadedly connected to the third connecting end through the first threaded portion and the second threaded portion; the first tubular shell (1) and the second tubular shell (2) are combined to form a filter cylinder; The first filter element (3), the second filter element (4), and the third filter element (5) are arranged at intervals inside the filter cylinder along the first direction (X1); the first direction (X1) is the flow direction of the electrolyte. The first filter element (3), the second filter element (4), and the third filter element (5) are each provided with a plurality of filter holes; in the first direction (X1), the diameter of the filter holes on the first filter element (3), the diameter of the filter holes on the second filter element (4), and the diameter of the filter holes on the third filter element (5) decrease sequentially.

2. The filtration device according to claim 1, characterized in that, The diameters of the first filter element (3), the second filter element (4), and the third filter element (5) are equal, and the distance between the first filter element (3) and the second filter element (4) is equal to the distance between the second filter element (4) and the third filter element (5); The ratio of the distance between two adjacent filter elements to the diameter of the first filter element (3), the second filter element (4), or the third filter element (5) is in the range of 0.6 to 0.

8.

3. The filtration device according to claim 1, characterized in that, The porosity of the first filter element (3) ranges from 30% to 40%; the porosity of the second filter element (4) ranges from 20% to 30%; and the porosity of the third filter element (5) ranges from 10% to 20%.

4. The filtration device according to claim 1, characterized in that, The end face of the second connecting end is also provided with an annular sealing groove, and the annular sealing groove is arranged around the annular connecting protrusion; the end face of the third connecting end is also provided with an annular sealing protrusion, and the annular sealing protrusion is arranged around the annular connecting groove; the annular sealing protrusion is adapted to the annular sealing groove.

5. The filtration device according to claim 4, characterized in that, A flexible sealing ring is provided between the inner wall of the annular sealing groove and the outer wall of the annular sealing protrusion.

6. The filtration device according to any one of claims 1 to 5, characterized in that, It also includes a flow rate monitoring module (6), which is located downstream of the third filter element (5) and can collect and display the flow rate information of the electrolyte.

7. The filtration device according to claim 6, characterized in that, It also includes an alarm component (7) disposed on the outside of the filter cartridge; the alarm component (7) is coupled to the flow rate monitoring module (6); When the flow velocity information collected by the flow velocity monitoring module (6) is less than the preset flow velocity information, the flow velocity monitoring module (6) can send a first electrical signal to the alarm component (7); the alarm component (7) can trigger an alarm action after receiving the first electrical signal.

8. The filtration device according to claim 6, characterized in that, The first connection end is connected to the liquid outlet (10) through the first control valve (91); The filtration device also includes a control module (8), which is coupled to the flow rate monitoring module (6) and the first control valve (91) respectively; When the flow velocity information collected by the flow velocity monitoring module (6) is less than the preset flow velocity information, the flow velocity monitoring module (6) can send a second electrical signal to the control module (8); after receiving the second electrical signal, the control module (8) can control the first control valve (91) to close.

9. The filtration device according to claim 8, characterized in that, The fourth connection end is connected to the electrolyte delivery pipeline (20) through the second control valve (92); the control module (8) is coupled to the second control valve (92); after receiving the second electrical signal, the control module (8) can simultaneously control the first control valve (91) and the second control valve (92) to close.

10. The filtration device according to claim 8, characterized in that, The fourth connection end is connected to the electrolyte delivery pipeline (20) through the second control valve (92); the control module (8) is coupled to the second control valve (92); after receiving the second electrical signal, the control module (8) can control the first control valve (91) to close, and after a preset time, control the second control valve (92) to close.

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