Piezoelectric-driven liquid flow energy storage electric pile, liquid flow energy storage equipment and control method of piezoelectric-driven liquid flow energy storage electric pile

Abstract

The invention relates to a liquid flow energy storage electric pile driven by piezoelectricity, liquid flow energy storage equipment, a control method and a control device of the liquid flow energy storage equipment, computer equipment and a computer readable storage medium. The liquid flow energy storage electric pile driven by piezoelectricity comprises a liquid flow energy storage unit, the liquid flow energy storage unit comprises a positive electrode mechanism, the positive electrode mechanism comprises a positive electrode assembly and a positive electrode driving assembly, and the positive electrode driving assembly is used for controlling a positive electrode electrolyte to flow in one direction along a first preset direction under the driving of a positive electrode driving signal; the positive electrode assembly and the positive electrode electrolyte are subjected to an energy storage reaction; and the negative electrode mechanism comprises a negative electrode assembly and a negative electrode driving assembly, and the negative electrode driving assembly is used for controlling the negative electrode electrolyte to flow unidirectionally along a second preset direction under the driving of the negative electrode driving signal, so that the negative electrode assembly and the negative electrode electrolyte are subjected to an energy storage reaction. Through reasonable and effective integration of the liquid flow energy storage units, the energy conversion efficiency of the whole liquid flow energy storage equipment system is improved, and the reliability and compactness of the system are improved.

Description

Technical Field

[0001] This application relates to the technical field of energy storage, and particularly to a piezoelectric-driven liquid flow energy storage stack, a liquid flow energy storage device, its control method, a control device, a computer device, and a computer-readable storage medium. Background Art

[0002] Broadly defined energy storage includes the storage of traditional fossil fuels (coal, oil, natural gas, etc.), the storage of new energy (hydrogen energy, solar energy, wind energy, etc.), electrical energy storage, and heat storage. Narrowly defined energy storage refers to a series of measures for storing the generated energy by chemical or physical methods. Modern electrical energy storage technologies mainly include pumped storage, compressed air energy storage, various electrochemical energy storages, flywheel energy storage, supercapacitors, etc. Electrochemical energy storage realizes the storage of electrical energy through the mutual conversion between electrical energy and chemical energy. Among them, a liquid flow battery realizes the storage and release of electrical energy through the valence state change of active substances in the electrolyte. Supercapacitors can be classified into three categories according to the energy storage mechanism: double-layer capacitors with double-layer electrodes on both the positive and negative sides; Faraday pseudocapacitors with quasi-capacitors on both the positive and negative sides; and hybrid electrochemical capacitors with double-layer and Faraday quasi-capacitors on the positive and negative electrodes respectively.

[0003] A liquid flow energy storage system mainly consists of a stack (group), an electrolyte circulation supply system, an energy storage control system, etc. Among them, the stack, as an energy storage device, is composed of multiple stack units. Each stack unit usually includes positive and negative electrodes and an ion exchange membrane. The positive and negative electrodes undergo energy storage reactions with the corresponding electrolytes in the energy storage device. The ion exchange membrane allows specific ions to pass through and prevents the mixing of electrolytes. According to the mechanism of liquid flow energy storage, during the electrochemical energy storage process of a liquid flow battery, the reversible oxidation-reduction reaction (i.e., the reversible change in valence state) of active substances in the positive and negative electrolytes is used to realize the mutual conversion between electrical energy and chemical energy. The electrolyte serves as the medium for storing energy in this type of liquid flow energy storage system; different energy storage mechanisms exist in liquid flow capacitors, and the electrodes serve as the medium for storing energy in this type of liquid flow energy storage system. When the liquid flow energy storage system operates, the electrolyte circulates between the storage tank and the stack under the pumping of the circulation supply system.

[0004] The electrolyte circulation supply system mainly consists of an electrolyte solution, an electrolyte storage tank, a circulation pump, pipelines, auxiliary equipment, instruments, and monitoring and protection equipment. The circulation pump is a power device that enables the electrolyte to circulate continuously. Due to the existence of pump losses during the operation of the circulation pump, it affects the energy efficiency of the electrolyte circulation supply system, and further affects the functional efficiency of the liquid flow energy storage device. Summary of the Invention

[0005] Based on this, it is necessary to provide a piezoelectric-driven liquid flow energy storage stack, a liquid flow energy storage device, a control method, a control device, a computer device, and a computer-readable storage medium for the above technical problems, which can improve the energy supply efficiency.

[0006] In a first aspect, the present invention provides a piezoelectric-driven liquid flow energy storage stack, including a liquid flow energy storage unit, and the liquid flow energy storage unit includes:

[0007] A positive electrode mechanism, including a positive electrode assembly and a positive electrode driving assembly, where the positive electrode driving assembly is used to control the unidirectional flow of the positive electrode electrolyte along a first preset direction under the drive of a positive electrode drive signal, so that an energy storage reaction occurs between the positive electrode assembly and the positive electrode electrolyte;

[0008] A negative electrode mechanism, including a negative electrode assembly and a negative electrode driving assembly, where the negative electrode driving assembly is used to control the unidirectional flow of the negative electrode electrolyte along a second preset direction under the drive of a negative electrode drive signal, so that an energy storage reaction occurs between the negative electrode assembly and the negative electrode electrolyte.

[0009] In one embodiment, the positive electrode mechanism further includes a first plate-like structure body, and a positive electrode reaction cavity is arranged inside the first plate-like structure body; on one side of the first plate-like structure body facing the negative electrode mechanism, a first sealing area is arranged, and an ion exchange membrane is arranged inside the first sealing area. One side of the ion exchange membrane is hermetically connected to the first plate-like structure body, and the positive electrode reaction cavity is formed inside the first sealing area;

[0010] The positive electrode assembly includes a positive electrode current collector plate arranged inside the positive electrode reaction cavity and a positive electrode plate electrically connected to the positive electrode current collector plate. The positive electrode plate is fixedly arranged on one side of the positive electrode current collector plate facing the positive electrode reaction cavity and isolates the positive electrode current collector plate from the positive electrode electrolyte. The positive electrode plate is used to have an energy storage reaction with the positive electrode electrolyte when electrified.

[0011] In one embodiment, a positive electrode liquid inlet cavity and a positive electrode liquid outlet cavity are further arranged inside the first plate-like structure body, and the positive electrode liquid inlet cavity, the positive electrode reaction cavity, and the positive electrode liquid outlet cavity are sequentially communicated along the first preset direction;

[0012] The positive electrode driving assembly includes a positive electrode liquid inlet piezoelectric structure arranged inside the positive electrode liquid inlet cavity and a positive electrode liquid outlet piezoelectric structure arranged inside the positive electrode liquid outlet cavity; the positive electrode liquid inlet piezoelectric structure is used to control the positive electrode electrolyte to flow into the positive electrode reaction cavity through the positive electrode liquid inlet cavity under the drive of the positive electrode drive signal, and the positive electrode liquid outlet piezoelectric structure is used to control the positive electrode electrolyte to flow out of the positive electrode reaction cavity through the positive electrode liquid outlet cavity under the drive of the positive electrode drive signal.

[0013] In one embodiment, the positive electrode liquid inlet chamber has a first positive electrode liquid inlet and a first positive electrode liquid outlet;

[0014] The positive electrode liquid inlet piezoelectric structure includes a first positive electrode piezoelectric sheet disposed in the positive electrode liquid inlet chamber, a first positive electrode liquid inlet valve floatingly disposed at the first positive electrode liquid inlet, and a first positive electrode liquid outlet valve floatingly disposed at the first positive electrode liquid outlet; the first positive electrode piezoelectric sheet is configured to deform convexly away from the positive electrode liquid inlet chamber under the control of the positive electrode driving signal to enable the positive electrode electrolyte to enter the positive electrode liquid inlet chamber unidirectionally through the first positive electrode liquid inlet, or deform concavely towards the positive electrode liquid inlet chamber to enable the positive electrode electrolyte to flow out of the positive electrode liquid inlet chamber unidirectionally through the first positive electrode liquid outlet.

[0015] In one embodiment, the positive electrode liquid outlet chamber has a second positive electrode liquid inlet and a second positive electrode liquid outlet;

[0016] The positive electrode liquid outlet piezoelectric structure includes a second positive electrode piezoelectric sheet disposed in the positive electrode liquid outlet chamber, a second positive electrode liquid inlet valve floatingly disposed at the second positive electrode liquid inlet, and a second positive electrode liquid outlet valve floatingly disposed at the second positive electrode liquid outlet; the second positive electrode piezoelectric sheet is configured to deform convexly away from the positive electrode liquid outlet chamber under the control of the positive electrode driving signal to enable the positive electrode electrolyte to enter the positive electrode liquid outlet chamber unidirectionally through the second positive electrode liquid inlet, or deform concavely towards the positive electrode liquid outlet chamber to enable the positive electrode electrolyte to flow out of the positive electrode liquid outlet chamber unidirectionally through the second positive electrode liquid outlet.

[0017] In one embodiment, the negative electrode mechanism further includes a second plate-like structure body, and a negative electrode reaction chamber is disposed in the second plate-like structure body; a second sealing region is disposed on a side of the second plate-like structure body facing the positive electrode mechanism, and the other side of the ion exchange membrane is hermetically connected to the second plate-like structure body, and the negative electrode reaction chamber is formed in the second sealing region;

[0018] The negative electrode assembly includes a negative electrode current collector plate disposed in the negative electrode reaction chamber and a negative electrode plate electrically connected to the negative electrode current collector plate, the negative electrode plate is fixedly disposed on a side of the negative electrode current collector plate facing the negative electrode reaction chamber and isolates the negative electrode current collector plate from the negative electrode electrolyte, and the negative electrode plate is configured to undergo an energy storage reaction with the negative electrode electrolyte when energized.

[0019] In one embodiment, a negative electrode liquid inlet chamber and a negative electrode liquid outlet chamber are further disposed in the second plate-like structure body, and the negative electrode liquid inlet chamber, the negative electrode reaction chamber, and the negative electrode liquid outlet chamber are sequentially communicated along the second preset direction;

[0020] The negative electrode driving assembly includes a negative electrode inlet piezoelectric structure disposed in the negative electrode inlet liquid chamber and a negative electrode outlet piezoelectric structure disposed in the negative electrode outlet liquid chamber; the negative electrode inlet piezoelectric structure is configured to control the negative electrode electrolyte to flow into the negative electrode reaction chamber through the negative electrode inlet liquid chamber under the drive of the negative electrode driving signal, and the negative electrode outlet piezoelectric structure is configured to control the negative electrode electrolyte to flow out of the negative electrode reaction chamber through the negative electrode outlet liquid chamber under the drive of the negative electrode driving signal.

[0021] In one embodiment, the negative electrode inlet liquid chamber has a first negative electrode inlet and a first negative electrode outlet;

[0022] The negative electrode inlet piezoelectric structure includes a first negative electrode piezoelectric sheet disposed in the negative electrode inlet liquid chamber, a first negative electrode inlet valve floatingly disposed at the first negative electrode inlet, and a first negative electrode outlet valve floatingly disposed at the first negative electrode outlet; the first negative electrode piezoelectric sheet is configured to deform convexly away from the negative electrode inlet liquid chamber direction under the control of the negative electrode driving signal to enable the negative electrode electrolyte to enter the negative electrode inlet liquid chamber unidirectionally through the first negative electrode inlet, or deform concavely towards the negative electrode inlet liquid chamber direction to enable the negative electrode electrolyte to flow out of the negative electrode inlet liquid chamber unidirectionally through the first negative electrode outlet.

[0023] In one embodiment, the negative electrode outlet liquid chamber has a second negative electrode inlet and a second negative electrode outlet;

[0024] The negative electrode outlet piezoelectric structure includes a second negative electrode piezoelectric sheet disposed in the negative electrode outlet liquid chamber, a second negative electrode inlet valve floatingly disposed at the second negative electrode inlet, and a second negative electrode outlet valve floatingly disposed at the second negative electrode outlet; the second negative electrode piezoelectric sheet is configured to deform convexly away from the negative electrode outlet liquid chamber direction under the control of the negative electrode driving signal to enable the negative electrode electrolyte to enter the negative electrode outlet liquid chamber unidirectionally through the second negative electrode inlet, or deform concavely towards the negative electrode outlet liquid chamber direction to enable the negative electrode electrolyte to flow out of the negative electrode outlet liquid chamber unidirectionally through the second negative electrode outlet.

[0025] In one embodiment, the liquid flow energy storage stack includes a plurality of the liquid flow energy storage units connected in parallel longitudinally. The positive electrode electrolyte flows into the corresponding positive electrode mechanism through a positive electrode inlet manifold connected to each positive electrode mechanism, and after respectively undergoing an energy storage reaction with the positive electrode plate in each positive electrode reaction chamber, flows out of the positive electrode mechanism through a positive electrode outlet manifold connected to each positive electrode mechanism; the negative electrode electrolyte flows into the corresponding negative electrode mechanism through a negative electrode inlet manifold connected to each negative electrode mechanism, and after respectively undergoing an energy storage reaction with the negative electrode plate in each negative electrode reaction chamber, flows out of the negative electrode mechanism through a negative electrode outlet manifold connected to each negative electrode mechanism.

[0026] In one embodiment, the liquid flow energy storage stack includes a plurality of the liquid flow energy storage units connected in parallel vertically. Each of the positive electrode reaction chambers is sequentially communicated vertically to form a positive electrode common reaction chamber, and each of the negative electrode reaction chambers is sequentially communicated vertically to form a negative electrode common reaction chamber;

[0027] The positive electrode electrolyte flows into the corresponding positive electrode mechanism through a positive electrode inlet manifold connected to each positive electrode mechanism, and after undergoing an energy storage reaction with the positive electrode assembly in the positive electrode common reaction chamber, it flows out of the positive electrode mechanism through a positive electrode outlet manifold connected to each positive electrode mechanism; the negative electrode electrolyte flows into the corresponding negative electrode mechanism through a negative electrode inlet manifold connected to each negative electrode mechanism, and after undergoing an energy storage reaction with the negative electrode assembly in the negative electrode common reaction chamber, it flows out of the negative electrode mechanism through a negative electrode outlet manifold connected to each negative electrode mechanism.

[0028] In one embodiment, the liquid flow energy storage stack includes a plurality of the liquid flow energy storage units distributed in an array. The connection modes of the plurality of liquid flow energy storage units include at least one of being sequentially connected in series horizontally, being sequentially connected in parallel vertically, and being sequentially connected in parallel longitudinally, and the horizontal direction, the vertical direction, and the longitudinal direction are orthogonal to each other in pairs.

[0029] In one embodiment, the positive electrode mechanism has a positive electrode reaction chamber, a plurality of positive electrode inlet chambers communicated with the positive electrode reaction chamber, and a plurality of positive electrode outlet chambers communicated with the positive electrode reaction chamber; the positive electrode assembly is arranged in the positive electrode reaction chamber, and the positive electrode driving assembly includes positive electrode inlet piezoelectric structures correspondingly arranged in each of the positive electrode inlet chambers and positive electrode outlet piezoelectric structures correspondingly arranged in each of the positive electrode outlet chambers;

[0030] The negative electrode mechanism has a negative electrode reaction chamber, a plurality of negative electrode inlet chambers communicated with the negative electrode reaction chamber, and a plurality of negative electrode outlet chambers communicated with the negative electrode reaction chamber; the negative electrode assembly is arranged in the negative electrode reaction chamber, and the negative electrode driving assembly includes negative electrode inlet piezoelectric structures correspondingly arranged in each of the negative electrode inlet chambers and negative electrode outlet piezoelectric structures correspondingly arranged in each of the negative electrode outlet chambers.

[0031] In one embodiment, the liquid flow energy storage stack includes a plurality of the liquid flow energy storage units distributed in an array. The connection manners of the plurality of the liquid flow energy storage units include at least one of being connected in series in the horizontal direction, being connected in parallel in the vertical direction, and being connected in parallel in the longitudinal direction, and the horizontal direction, the vertical direction, and the longitudinal direction are orthogonal to each other pairwise. Among them, in two adjacent positive electrode mechanisms connected in series, the positive electrode liquid outlet cavity of the positive electrode mechanism at the head end is communicated with the positive electrode liquid inlet cavity of the positive electrode mechanism at the tail end. In two adjacent negative electrode mechanisms connected in series, the negative electrode liquid outlet cavity of the negative electrode mechanism at the head end is communicated with the negative electrode liquid inlet cavity of the negative electrode mechanism at the tail end. In two adjacent positive electrode mechanisms connected in parallel, each positive electrode liquid inlet cavity is communicated in sequence, and each positive electrode liquid outlet cavity is communicated in sequence. In two adjacent negative electrode mechanisms connected in parallel, each negative electrode liquid inlet cavity is communicated in sequence, and each negative electrode liquid outlet cavity is communicated in sequence.

[0032] In a second aspect, the present invention provides a liquid flow energy storage device, including the liquid flow energy storage stack and a liquid flow energy storage management system as described above. Among them:

[0033] The liquid flow energy storage management system is connected to both the positive electrode driving assembly and the negative electrode driving assembly. The liquid flow energy storage management system is used to generate the positive electrode driving signal and the negative electrode driving signal to drive the positive electrode driving assembly and the negative electrode driving assembly to control the corresponding electrolyte to flow along a preset direction.

[0034] In one embodiment, the liquid flow energy storage management system includes:

[0035] a processor, configured to acquire at least one of a flow signal and a pressure signal of the electrolyte flowing through the positive electrode mechanism and the negative electrode mechanism;

[0036] a signal generator, electrically connected to the positive electrode driving assembly and the negative electrode driving assembly. The signal generator is used to generate or adjust the positive electrode driving signal and the negative electrode driving signal according to at least one of the flow signal and the pressure signal.

[0037] In one embodiment, it further includes:

[0038] a positive electrode circulation loop, configured to circularly supply positive electrode electrolyte to the positive electrode mechanism, so that the positive electrode electrolyte undergoes an energy storage reaction with the positive electrode assembly during the circulation process;

[0039] a negative electrode circulation loop, configured to circularly supply negative electrode electrolyte to the negative electrode mechanism, so that the negative electrode electrolyte undergoes an energy storage reaction with the negative electrode assembly during the circulation process.

[0040] In one embodiment, it further includes:

[0041] A power supply system, connected to both the positive electrode assembly and the negative electrode assembly, is configured to supply power to the positive electrode assembly and the negative electrode assembly, enabling the positive electrode assembly and the negative electrode assembly to undergo energy storage reactions with the corresponding electrolytes.

[0042] In a third aspect, the present invention provides a control method for a liquid flow energy storage device. The liquid flow energy storage device includes a liquid flow energy storage unit, and the liquid flow energy storage unit includes a positive electrode mechanism and a negative electrode mechanism. The method includes:

[0043] Generating a positive electrode drive signal and a negative electrode drive signal respectively;

[0044] Applying the positive electrode drive signal to the positive electrode mechanism; the positive electrode mechanism includes a positive electrode assembly and a positive electrode drive component, and the positive electrode drive signal is used to instruct the positive electrode drive component to control the unidirectional flow of the positive electrode electrolyte along a first preset direction, so that the positive electrode assembly undergoes an energy storage reaction with the positive electrode electrolyte;

[0045] Applying the negative electrode drive signal to the negative electrode mechanism; the negative electrode mechanism includes a negative electrode assembly and a negative electrode drive component, and the negative electrode drive signal is used to instruct the negative electrode drive component to control the unidirectional flow of the negative electrode electrolyte along a second preset direction, so that the negative electrode assembly undergoes an energy storage reaction with the negative electrode electrolyte.

[0046] In a fourth aspect, the present invention provides a control device for a liquid flow energy storage device. The liquid flow energy storage device includes a liquid flow energy storage unit, and the liquid flow energy storage unit includes a positive electrode mechanism and a negative electrode mechanism. The device includes:

[0047] A signal generation module, configured to generate a positive electrode drive signal and a negative electrode drive signal respectively;

[0048] A first control module, configured to apply the positive electrode drive signal to the positive electrode mechanism; the positive electrode mechanism includes a positive electrode assembly and a positive electrode drive component, and the positive electrode drive signal is used to instruct the positive electrode drive component to control the unidirectional flow of the positive electrode electrolyte along a first preset direction, so that the positive electrode assembly undergoes an energy storage reaction with the positive electrode electrolyte;

[0049] A second control module, configured to apply the negative electrode drive signal to the negative electrode mechanism; the negative electrode mechanism includes a negative electrode assembly and a negative electrode drive component, and the negative electrode drive signal is used to instruct the negative electrode drive component to control the unidirectional flow of the negative electrode electrolyte along a second preset direction, so that the negative electrode assembly undergoes an energy storage reaction with the negative electrode electrolyte.

[0050] In a fifth aspect, the present invention provides a computer device, including a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, the steps of the method described above are implemented.

[0051] In a sixth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the method described above are implemented.

[0052] In the above-mentioned piezoelectric-driven liquid flow energy storage stack, liquid flow energy storage device, its control method, control device, computer device and computer-readable storage medium, by integrating the positive electrode drive assembly and the negative electrode drive assembly inside the liquid flow energy storage unit, the positive electrode drive assembly and the negative electrode drive assembly can directly drive the flow of the electrolyte under the control of the corresponding drive signals, without the need to additionally set up a drive device for the electrolyte. On the one hand, it is beneficial to reduce the influence of the reduction in the electrolyte flow rate caused by the operating energy consumption and mechanical wear of the pump, and thus is beneficial to improving the energy conversion efficiency of the entire liquid flow energy storage device system; on the other hand, it can also reduce the complexity and installation cost of the entire system, and thus improve the reliability and compactness of the system, facilitating the integration and maintenance of the system. At the same time, inside the positive electrode mechanism and the negative electrode mechanism, the positive electrode drive assembly and the negative electrode drive assembly can control the corresponding electrolyte to flow unidirectionally in a preset direction, which can ensure effective contact between the electrolyte and the corresponding electrode assembly, and thus improve the reaction rate and energy conversion efficiency of the liquid flow energy storage device. Description of the Drawings

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0054] Figure 1 It is a schematic structural diagram of a liquid flow energy storage stack according to an embodiment;

[0055] Figure 2 It is Figure 1 An enlarged view of part C in

[0056] Figure 3 It is Figure 1 A schematic structural diagram of the liquid flow energy storage stack on the liquid inlet side in

[0057] Figure 4 It is Figure 1 A schematic structural diagram of the liquid flow energy storage stack on the liquid outlet side in

[0058] Figure 5 It is Figure 3 An enlarged view of part D in

[0059] Figure 6Schematic diagram of the structure of vertically connected liquid flow energy storage units in one embodiment;

[0060] Figure 7 is Figure 6 end view in the direction of E - E in;

[0061] Figure 8 is Figure 6 end view in the direction of F - F in;

[0062] Figure 9 Schematic diagram of the structure of liquid flow energy storage units distributed in an array in one embodiment;

[0063] Figure 10 Schematic diagram of the structure of a liquid flow energy storage stack in another embodiment;

[0064] Figure 11 Schematic diagram of the structure of liquid flow energy storage units distributed in an array in another embodiment;

[0065] Figure 12 is Figure 11 end view in the direction of H - H in;

[0066] Figure 13 Schematic diagram of the structure of a liquid flow energy storage device in one embodiment;

[0067] Figure 14 Schematic diagram of the structure of a liquid flow energy storage device in another embodiment;

[0068] Figure 15 is Figure 13 block diagram of the structure of the liquid flow energy storage management system in;

[0069] Figure 16 Flow schematic diagram of the control method of a liquid flow energy storage device in one embodiment.

[0070] Explanation of reference numerals:

[0071] Positive electrolyte A, negative electrolyte B;

[0072] Positive electrode mechanism 100, positive electrode assembly 110, positive electrode current collector plate 111, positive electrode plate 112, positive electrode drive assembly 120, positive electrode hydraulic piezoelectric structure 121, first positive piezoelectric sheet 1211, first positive liquid inlet valve 1212, first rod portion 1212a, first umbrella portion 1212b, first positive liquid outlet valve 1213, second rod portion 1213a, second umbrella portion 1213b, positive electrode liquid outlet piezoelectric structure 122, second positive piezoelectric sheet 1221, second positive liquid inlet valve 1222, second positive liquid outlet valve 1223, first plate structure 130, positive electrode reaction chamber 131, first positive electrode connection hole 132, positive electrode liquid inlet chamber 133, first positive electrode liquid inlet 1331, first floating hole 1331a, positive electrode liquid inlet hole 1331b, first positive electrode liquid outlet 1332, second floating hole 1332a, positive electrode liquid outlet hole 1332b, positive electrode liquid outlet chamber 134, second positive electrode liquid inlet 1341, second positive electrode liquid outlet 1342, second positive electrode connection hole 135, third positive electrode connection hole 136, positive electrode common reaction chamber 140, positive electrode liquid inlet channel 150, positive electrode liquid outlet channel 160;

[0073] Negative electrode mechanism 200, negative electrode assembly 210, negative electrode current collector plate 211, negative electrode plate 212, negative electrode drive assembly 220, negative electrode hydraulic piezoelectric structure 221, first negative piezoelectric sheet 2211, first negative liquid inlet valve 2212, third rod portion 2212a, third umbrella portion 2212b, first negative liquid outlet valve 2213, fourth rod portion 2213a, fourth umbrella portion 2213b, negative electrode liquid outlet piezoelectric structure 222, second negative piezoelectric sheet 2221, second negative liquid inlet valve 2222, second negative liquid outlet valve 2223, second plate structure 230, negative electrode reaction chamber 231, first negative electrode connection hole 232, negative electrode liquid inlet chamber 233, first negative electrode liquid inlet 2331, third floating hole 2331a, negative electrode liquid inlet hole 2331b, first negative electrode liquid outlet 2332, fourth floating hole 2332a, negative electrode liquid outlet hole 2332b, negative electrode liquid outlet chamber 234, second negative electrode liquid inlet 2341, second negative electrode liquid outlet 2342, second negative electrode connection hole 235, third negative electrode connection hole 236, negative electrode common reaction chamber 240, negative electrode liquid inlet channel 250, negative electrode liquid outlet channel 260;

[0074] First sealing ring 310, second sealing ring 320;

[0075] Ion exchange membrane 400;

[0076] Liquid flow energy storage management system 500, processor 510, signal generator 520, amplitude modulator 521, frequency modulator 522, drive power supply 530;

[0077] Power supply system 600;

[0078] Positive electrode circulation loop 700;

[0079] The negative electrode circulation circuit 800. Specific implementation manners

[0080] For ease of understanding the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present application is thorough and complete.

[0081] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used in the specification of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0082] It can be understood that the terms "first", "second", etc. used in this application can be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first resistor can be referred to as a second resistor, and similarly, a second resistor can be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0083] It can be understood that "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if there is an electrical signal or data transfer between the connected circuits, modules, units, etc.

[0084] It can be understood that "at least one" means one or more, and "a plurality" means two or more. "At least a part of an element" means a part or all of the element.

[0085] As used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprising", "including" or "having", etc. specify the presence of the stated features, wholes, steps, operations, components, parts or combinations thereof, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the related listed items.

[0086] In the stack structure of a liquid flow energy storage device and system, the stack is composed of a number of stack monomers. Manifolds (distribution channels) are designed within the positive and negative electrode frames of the stack monomers to facilitate the upflow of the positive and negative electrolyte solutions (or positive and negative electrolytes) from the positive and negative main channels of the stack respectively, through the manifolds, into and out of the positive and negative chambers of each stack monomer, and to undergo electrochemical oxidation-reduction reactions at the interfaces of the positive and negative electrodes. The positive and negative main channels of the stack can be formed within the stack by the internal structures of the positive and negative electrode frames of the stack monomers, or outside the stack by independent main pipes and manifold structures connecting the positive and negative electrode frames of each stack monomer.

[0087] Among them, the circulation pump is an important component in the liquid flow energy storage device and system. Generally speaking, the liquid flow energy storage device and system require two liquid storage tanks filled with positive and negative electrolytes, and two circulation pumps are used to pump the positive and negative electrolytes into the stack (group) respectively. On the premise of ensuring the normal operation of the liquid flow energy storage device and system, the circulation of the electrolyte will lead to losses of the pump and a decrease in the overall energy efficiency of the liquid flow energy storage device and system. The combination of the common channels and the branch channels in the stack structure forms the structure for guiding, distributing, and dispersing the electrolyte inside the stack; under certain flow rate requirements, the positive and negative electrolytes enter the stack (group) through pipes. Due to the viscosity of the electrolyte, as well as the influence of the pipe structure and the roughness of its inner wall, relevant hydraulic friction losses and hydraulic losses caused by factors such as the impact on the fluid, changes in pipe diameter, and changes in the direction of velocity occur, thus consuming a part of the energy. In addition, this structure is related to the bypass current of the stack of the liquid flow energy storage device, which has a certain impact on the performance and efficiency of the liquid flow energy storage device system. The pump losses generated in the liquid flow circulation system and the flow rate requirements of the positive and negative electrolytes also have a certain impact on the performance and energy efficiency of the liquid flow energy storage device system. Experiments show that the influence of the power consumption of the circulation pump on the system energy efficiency is about 5%.

[0088] At the same time, once the circulation pump fails, the liquid flow energy storage system will not be able to perform normal charge and discharge operations. Thus, it can be seen that the stability and reliability of the circulation pump play a crucial role in the liquid flow energy storage system. Due to the usually strong acid-base properties of the electrolyte, it is required that the pump head part of the circulation pump in contact with the electrolyte be made of plastic materials with strong acid-base resistance, such as polypropylene (PP, i.e., Polypropylene), polyvinylidene fluoride (PVDF, i.e., Polyvinylidene Fluoride), etc., and the type of the circulation pump is mainly a centrifugal magnetic pump. Using a circulation pump to drive the electrolyte to achieve liquid flow circulation has potential hidden dangers in terms of reliability and stability.

[0089] Such as Figure 1As shown in the figure, a piezoelectric-driven liquid flow energy storage stack according to an embodiment of the present invention includes a liquid flow energy storage unit. The liquid flow energy storage unit includes a positive electrode mechanism 100 and a negative electrode mechanism 200. The positive electrode mechanism 100 is used to carry out an energy storage reaction with the positive electrode electrolyte A, and the negative electrode mechanism 200 is used to carry out an energy storage reaction with the negative electrode electrolyte B. Specifically, when implemented, the liquid flow energy storage stack can be a liquid flow energy storage battery, a liquid flow energy storage capacitor, or other stack structures that can realize the conversion between chemical energy and electrical energy through an energy storage reaction. For a liquid flow energy storage battery, the energy storage reactions implemented on the positive electrode mechanism 100 and the negative electrode mechanism 200 are electrochemical reactions to realize the conversion between chemical energy and electrical energy, and then supply power to electrical equipment. The electrical equipment can be a power generation equipment, an energy storage equipment of an electric vehicle, an uninterruptible power supply, a backup power supply, etc.; for a liquid flow energy storage capacitor, the energy storage reactions implemented on the positive electrode mechanism 100 and the negative electrode mechanism 200 are at least one of an electrochemical reaction and charge accumulation to realize the charging and discharging process of the liquid flow energy storage capacitor.

[0090] The positive electrode mechanism 100 includes a positive electrode component 110 and a positive electrode driving component 120. The positive electrode driving component 120 is used to control the unidirectional flow of the positive electrode electrolyte A along a first preset direction under the drive of a positive electrode drive signal, so that the positive electrode component 110 reacts with the positive electrode electrolyte A for energy storage.

[0091] Among them, the first preset direction refers to the direction in which the positive electrode electrolyte A flows into the positive electrode mechanism 100 and then flows out of the positive electrode mechanism 100. According to the layout direction of the positive electrode mechanism 100, the first preset direction can be horizontal, vertical, or a direction set at a certain angle. The unidirectional flow of the positive electrode electrolyte A means that the positive electrode electrolyte A flows in a single direction within the positive electrode mechanism 100 to ensure that the positive electrode electrolyte A flows into the positive electrode mechanism 100 from the inlet of the positive electrode mechanism 100, reacts with the positive electrode component 110 within the positive electrode mechanism 100 for energy storage, and then flows out through the outlet of the positive electrode mechanism 100 and circulates in this way. Specifically, when implemented, the inlet direction and the outlet direction of the positive electrode mechanism 100 can be in the same direction or not in the same direction. For example, the extension line of the inlet direction of the positive electrode mechanism 100 intersects with the extension line of the outlet direction of the positive electrode mechanism 100.

[0092] The negative electrode mechanism 200 includes a negative electrode component 210 and a negative electrode driving component 220. The negative electrode driving component 220 is used to control the unidirectional flow of the negative electrode electrolyte B along a second preset direction under the drive of a negative electrode drive signal, so that the negative electrode component 210 reacts with the negative electrode electrolyte B for energy storage.

[0093] Wherein, the second preset direction refers to the direction in which the negative electrolyte B flows into the negative electrode mechanism 200 and then flows out of the negative electrode mechanism 200. The second preset direction is similar to the first preset direction, and is also set to be horizontal, vertical, upright or a direction set at a certain angle according to the layout direction of the negative electrode mechanism 200. The unidirectional flow of the negative electrolyte B means that the negative electrolyte B flows in a single direction within the negative electrode mechanism 200, so as to ensure that the negative electrolyte B flows into the negative electrode mechanism 200 from the inlet of the negative electrode mechanism 200, and after undergoing an energy storage reaction with the negative electrode assembly 210 within the negative electrode mechanism 200, it flows out through the outlet of the negative electrode mechanism 200, and circulates in this way. Specifically, when implemented, similar to the positive electrode mechanism 100, the inlet direction and the outlet direction of the negative electrode mechanism 200 may or may not be in the same direction. For example, the extension line of the inlet direction of the negative electrode mechanism 200 intersects with the extension line of the outlet direction of the negative electrode mechanism 200.

[0094] When the flow battery stack of the embodiment of the present application is working, for the positive electrode mechanism 100, when the positive electrode driving signal reaches the positive electrode driving component 120, the positive electrode driving component 120 starts to act to drive the positive electrolyte A to flow into the positive electrode mechanism 100 from the inlet of the positive electrode mechanism 100, so that the positive electrolyte A flows along the first preset direction under the drive of the positive electrode driving component 120 to reach the positive electrode assembly 110 and contacts the positive electrode assembly 110, and then undergoes an energy storage reaction with the positive electrode assembly 110. Subsequently, the positive electrolyte A flows out of the positive electrode mechanism 100 through the outlet of the positive electrode mechanism 100 along the first preset direction under the drive of the positive electrode driving component 120, and finally returns to the corresponding liquid storage tank to form a primary liquid flow cycle, and circulates in this way; for the negative electrode mechanism 200, when the negative electrode driving signal reaches the negative electrode driving component 220, the negative electrode driving component 220 starts to act to drive the negative electrolyte B to flow into the negative electrode mechanism 200 from the inlet of the negative electrode mechanism 200, so that the negative electrolyte B flows along the second preset direction under the drive of the negative electrode driving component 220 to reach the negative electrode assembly 210 and contacts the negative electrode assembly 210, and then undergoes an energy storage reaction with the negative electrode assembly 210. Subsequently, the negative electrolyte B flows out of the negative electrode mechanism 200 through the outlet of the negative electrode mechanism 200 along the second preset direction under the drive of the negative electrode driving component 220, and finally returns to the corresponding liquid storage tank to form a primary liquid flow cycle, and circulates in this way.

[0095] In this embodiment, by integrating the positive electrode driving component 120 and the negative electrode driving component 220 inside the liquid flow energy storage unit, the positive electrode driving component 120 and the negative electrode driving component 220 can directly drive the flow of the electrolyte under the control of the corresponding driving signals, without the need to additionally set up driving equipment for the electrolyte. On the one hand, it is beneficial to reduce the influence of pump operation failures and mechanical wear on the circulating flow state of the electrolyte, and thus beneficial to improving the energy conversion efficiency of the entire liquid flow energy storage device and system; on the other hand, it can also reduce the complexity of the entire system and the installation and maintenance costs, and thus improve the reliability and compactness of the system, facilitating the integration and maintenance of the system. At the same time, inside the positive electrode mechanism 100 and the negative electrode mechanism 200, the positive electrode driving component 120 and the negative electrode driving component 220 can control the corresponding electrolyte to flow unidirectionally in a preset direction, ensuring effective contact between the electrolyte and the corresponding electrode components, and thus improving the reaction rate and energy conversion efficiency of the liquid flow energy storage device.

[0096] In one embodiment, please refer to Figure 1 and Figure 2 , the positive electrode mechanism 100 further includes a first plate-like structure 130. A positive electrode reaction chamber 131 is provided inside the first plate-like structure 130. The positive electrode assembly 110 is disposed in the positive electrode reaction chamber 131. When the positive electrode electrolyte A flows into the positive electrode reaction chamber 131, an energy storage reaction occurs between the positive electrode electrolyte A and the positive electrode assembly 110 in the positive electrode reaction chamber 131. Specifically, a first sealing region is provided on the side of the first plate-like structure 130 facing the negative electrode mechanism 200. An ion exchange membrane 400 is provided in the first sealing region. One side of the ion exchange membrane 400 is hermetically connected to the first plate-like structure 130, and the positive electrode reaction chamber 131 is formed in the first sealing region.

[0097] In an exemplary embodiment, the first sealing region is a first sealing groove formed by concave inward on the side of the first plate-like structure 130 facing the negative electrode mechanism 200. The side of the first plate-like structure 130 facing the negative electrode mechanism 200 contacts the corresponding side surface of the ion exchange membrane 400, and a first sealing ring 310 is provided between the first plate-like structure 130 and the ion exchange membrane 400. The first sealing ring 310 and the first sealing groove together form a sealing structure, thereby forming a relatively closed positive electrode reaction chamber 131 to prevent the leakage of the positive electrode electrolyte A. The ion exchange membrane 400 can realize the exchange of target ions in the electrolyte and cooperate with the energy storage reaction of the liquid flow energy storage device. At the same time, the ion exchange membrane 400 can also play a role in isolating the positive electrode electrolyte A from the negative electrode electrolyte B, thereby preventing the mixing of electrolytes and ensuring the stability and high efficiency of the liquid flow energy storage device.

[0098] Understandably, in some other embodiments, a gasket, a sealing line, a hot melt film, or other structures may also be used between the first plate - type structure 130 and the ion - exchange membrane 400 to achieve sealing and form a sealed area, so as to prevent the leakage of the positive electrode electrolyte A.

[0099] The positive electrode assembly 110 includes a positive current collector plate 111 and a positive electrode plate 112. Among them:

[0100] The positive electrode plate 112 is fixedly arranged on one side of the positive current collector plate 111 facing the positive electrode reaction chamber 131 to isolate the positive current collector plate 111 from the positive electrode electrolyte A and prevent the positive current collector plate 111 from contacting the positive electrode electrolyte A; the positive electrode plate 112 is electrically connected to the positive current collector plate 111, and the positive electrode plate 112 is used to undergo an energy - storage reaction with the positive electrode electrolyte A when powered on. Specifically, the positive current collector plate 111 is arranged in the positive electrode reaction chamber 131 and corresponds to the side far from the negative electrode mechanism 200 (or the ion - exchange membrane 400), and the positive electrode plate 112 is arranged on the side of the positive current collector plate 111 facing the negative electrode mechanism 200, so that the positive electrode plate 112 can contact the positive electrode electrolyte A flowing into the positive electrode reaction chamber 131 and undergo an energy - storage reaction with the positive electrode electrolyte A when powered on.

[0101] In an alternative embodiment, a first positive - electrode wiring hole 132 is provided at a position on the first plate - type structure 130 corresponding to the positive electrode reaction chamber 131. The first positive - electrode wiring hole 132 enables the positive current collector plate 111 to communicate with the outside. The first positive - electrode wiring hole 132 is used to provide a channel for the output lead of the positive current collector plate 111, so that the positive current collector plate 111 can be connected to the external power supply system 600 to realize the power - on of the positive electrode plate 112.

[0102] When the positive electrode electrolyte A enters the positive electrode reaction chamber 131, it contacts the positive electrode plate 112 in the positive electrode reaction chamber 131. The positive electrode plate 112 is electrically connected to the external power supply system 600 through the positive current collector plate 111, and after being powered on, it undergoes an energy - storage reaction with the positive electrode electrolyte A. At the same time, the target ions in the positive electrode electrolyte A migrate through the exchange channel constructed by the ion - exchange membrane 400 to form a charge - discharge loop.

[0103] In this embodiment, by arranging the positive electrode reaction chamber 131 in the first plate - type structure 130 and integrating the positive electrode assembly 110 in the positive electrode reaction chamber 131, the integration degree of the entire positive electrode mechanism 100 can be improved, thereby simplifying the structural form of the positive electrode mechanism 100.

[0104] In one embodiment, please refer to Figure 1 and Figure 3, a positive electrode liquid inlet cavity 133 and a positive electrode liquid outlet cavity 134 are further provided in the first plate - type structure 130. The positive electrode liquid inlet cavity 133, the positive electrode reaction cavity 131, and the positive electrode liquid outlet cavity 134 are connected in sequence along a first preset direction to form a positive electrode liquid flow channel arranged along the first preset direction. When the positive electrode electrolyte A flows, it can enter the positive electrode reaction cavity 131 through the positive electrode liquid inlet cavity 133, react with the positive electrode plate 112 in the positive electrode reaction cavity 131, then flow out through the positive electrode liquid outlet cavity 134, and finally return to the liquid storage tank. In this way, the cycle is carried out, and the conversion between chemical energy and electrical energy is realized.

[0105] The positive electrode driving assembly 120 includes a positive electrode liquid inlet piezoelectric structure 121 and a positive electrode liquid outlet piezoelectric structure 122. Among them:

[0106] The positive electrode liquid inlet piezoelectric structure 121 is arranged in the positive electrode liquid inlet cavity 133. The positive electrode liquid inlet piezoelectric structure 121 is used to control the positive electrode electrolyte A to flow into the positive electrode reaction cavity 131 through the positive electrode liquid inlet cavity 133 under the drive of a positive electrode driving signal. The positive electrode liquid outlet piezoelectric structure 122 is arranged in the positive electrode liquid outlet cavity 134. The positive electrode liquid outlet piezoelectric structure 122 is used to control the positive electrode electrolyte A to flow out of the positive electrode reaction cavity 131 through the positive electrode liquid outlet cavity 134 under the drive of a positive electrode driving signal.

[0107] In an optional embodiment, a second positive electrode wiring hole 135 is provided at a position on the first plate - type structure 130 corresponding to the positive electrode liquid inlet cavity 133, which is used to provide a channel for the output lead of the positive electrode liquid inlet piezoelectric structure 121, so that the positive electrode liquid inlet piezoelectric structure 121 can be connected to an external liquid - flow energy storage management system 500 to access the corresponding positive electrode driving signal. A third positive electrode wiring hole 136 is further provided at a position on the first plate - type structure 130 corresponding to the positive electrode liquid outlet cavity 134, which is used to provide a channel for the output lead of the positive electrode liquid outlet piezoelectric structure 122, so that the positive electrode liquid outlet piezoelectric structure 122 can be connected to an external liquid - flow energy storage management system 500 to access the corresponding positive electrode driving signal.

[0108] When the positive electrode mechanism 100 is working, the liquid - flow energy storage management system 500 respectively provides corresponding positive electrode driving signals to the positive electrode liquid inlet piezoelectric structure 121 and the positive electrode liquid outlet piezoelectric structure 122, so that the positive electrode electrolyte A enters the positive electrode liquid inlet cavity 133 under the action of the positive electrode liquid inlet piezoelectric structure 121. With the continuous action of the positive electrode liquid inlet piezoelectric structure 121, the positive electrode electrolyte A enters the positive electrode reaction cavity 131 from the positive electrode liquid inlet cavity 133. After the reaction with the positive electrode plate 112 in the positive electrode reaction cavity 131 is completed, the positive electrode liquid outlet piezoelectric structure 122 controls the positive electrode electrolyte A in the positive electrode reaction cavity 131 to flow into the positive electrode liquid outlet cavity 134 under the drive of the positive electrode driving signal. With the continuous action of the positive electrode liquid outlet piezoelectric structure 122, the positive electrode electrolyte A flows out of the positive electrode liquid outlet cavity 134 and finally returns to the liquid storage tank. In this way, the cycle is carried out.

[0109] In this embodiment, by integrating the positive electrode inlet hydraulic power generation structure 121 and the positive electrode outlet hydraulic power generation structure 122 in the first plate-shaped structure 130, the positive electrode driving signal is used to control the respective operations of the positive electrode inlet hydraulic power generation structure 121 and the positive electrode outlet hydraulic power generation structure 122, so as to dynamically change the pressure in the positive electrode inlet liquid chamber 133 and the positive electrode outlet liquid chamber 134 (forming local negative pressure or pushing pressure), thereby providing power for the flow of the positive electrode electrolyte A in the positive electrode inlet liquid chamber 133, the positive electrode reaction chamber 131, and the positive electrode outlet liquid chamber 134, and realizing the directional flow of the positive electrode electrolyte A. This embodiment does not require an additional power pump, thereby reducing the energy loss during the flow of the positive electrode electrolyte A and being beneficial to improving the energy efficiency of the liquid flow energy storage device.

[0110] In one embodiment, please refer to Figure 3 and Figure 4 , the positive electrode inlet liquid chamber 133 has a first positive electrode inlet 1331 and a first positive electrode outlet 1332. The positive electrode electrolyte A flows into the positive electrode inlet liquid chamber 133 through the first positive electrode inlet 1331 and flows out of the positive electrode inlet liquid chamber 133 through the first positive electrode outlet 1332.

[0111] The positive electrode inlet hydraulic power generation structure 121 includes a first positive electrode piezoelectric sheet 1211, a first positive electrode inlet valve 1212, and a first positive electrode outlet valve 1213. Among them:

[0112] The first positive electrode piezoelectric sheet 1211 is disposed in the positive electrode inlet liquid chamber 133. The first positive electrode piezoelectric sheet 1211 is used to deform convexly in a direction away from the positive electrode inlet liquid chamber 133 under the control of the positive electrode driving signal to enable the positive electrode electrolyte A to enter the positive electrode inlet liquid chamber 133 unidirectionally through the first positive electrode inlet 1331, or deform concavely in a direction close to the positive electrode inlet liquid chamber 133 to enable the positive electrode electrolyte A to flow out of the positive electrode inlet liquid chamber 133 unidirectionally through the first positive electrode outlet 1332.

[0113] The first positive piezoelectric sheet 1211 divides the positive liquid inlet cavity 133 into two parts, the inner and the outer. The part of the positive liquid inlet cavity 133 inside the first positive piezoelectric sheet 1211 (i.e., the side facing away from the second positive wiring hole 135) is called the "inner part of the positive liquid inlet cavity", and correspondingly, the part of the positive liquid inlet cavity 133 outside the first positive piezoelectric sheet 1211 (i.e., the side facing the second positive wiring hole 135) is called the "outer part of the positive liquid inlet cavity". The inner part of the positive liquid inlet cavity is connected to the positive reaction cavity 131. When the first positive piezoelectric sheet 1211 receives a positive driving signal, it will vibrate, causing the volume of the inner part of the positive liquid inlet cavity to change periodically. With the cooperation of the first positive liquid inlet valve 1212 and the first positive liquid outlet valve 1213, the positive electrolyte A is unidirectionally transported along the first preset direction. The outer part of the positive liquid inlet cavity is connected to the second positive wiring hole 135, so that the output lead connects the first positive piezoelectric sheet 1211 and the liquid flow energy storage management system 500, and then provides a positive driving signal to the first positive piezoelectric sheet 1211, causing the first positive piezoelectric sheet 1211 to deform under the drive of the positive driving signal.

[0114] The first positive liquid inlet valve 1212 is floatingly arranged at the first positive liquid inlet 1331 and can float relative to the first positive liquid inlet 1331; the first positive liquid outlet valve 1213 is floatingly arranged at the first positive liquid outlet 1332 and can float relative to the first positive liquid outlet 1332; the first positive liquid inlet valve 1212 and the first positive liquid outlet valve 1213 float synchronously with the local negative pressure or pushing pressure generated by the deformation of the first positive piezoelectric sheet 1211 to realize the entry or exit of the positive electrolyte A into or out of the positive liquid inlet cavity 133.

[0115] When the first positive piezoelectric sheet 1211 deforms under the drive of the positive driving signal, when the first positive piezoelectric sheet 1211 bulges outward towards the outer part of the positive liquid inlet cavity, the volume of the corresponding inner part of the positive liquid inlet cavity in the positive liquid inlet cavity 133 increases, generating a local negative pressure, causing the first positive liquid inlet valve 1212 to move towards the inner part of the positive liquid inlet cavity to open the first positive liquid inlet 1331, enabling the positive electrolyte A to enter the inner part of the positive liquid inlet cavity through the first positive liquid inlet 1331; at the same time, due to the action of the local negative pressure generated in the inner part of the positive liquid inlet cavity, the first positive liquid outlet valve 1213 blocks the first positive liquid outlet 1332 to restrict the outflow of the positive electrolyte A from the first positive liquid outlet 1332.

[0116] When the first positive piezoelectric sheet 1211 deforms under the drive of the positive drive signal, when the first positive piezoelectric sheet 1211 concaves inward towards the inner part of the positive liquid inlet cavity (i.e., during reverse reset), the volume of the corresponding inner part of the positive liquid inlet cavity 133 in the positive liquid inlet cavity decreases, generating a local pushing pressure. At this time, the first positive liquid inlet valve 1212 blocks the first positive liquid inlet 1331 under the action of the pushing pressure to limit the inflow of the positive electrolyte A through the first positive liquid inlet 1331; at the same time, the positive electrolyte A in the inner part of the positive liquid inlet cavity pushes the first positive liquid outlet valve 1213 and moves synchronously away from the inner part of the positive liquid inlet cavity to open the first positive liquid outlet 1332, so that the positive electrolyte A can flow out of the inner part of the positive liquid inlet cavity through the first positive liquid outlet 1332 and enter the positive reaction cavity 131. With the vibration of the first positive piezoelectric sheet 1211, the volume and pressure of the inner part of the positive liquid inlet cavity change periodically, and then the first positive liquid inlet valve 1212 and the first positive liquid outlet valve 1213 periodically and alternately open and block the first positive liquid inlet 1331 and the first positive liquid outlet 1332, thus realizing the one-way flow of the positive electrolyte A.

[0117] In an exemplary embodiment, the first positive liquid inlet 1331 includes a first floating hole 1331a provided therethrough and a positive liquid inlet hole 1331b provided therethrough around the first floating hole 1331a. The positive liquid inlet hole 1331b is annular and spaced around the periphery of the first floating hole 1331a. The positive liquid inlet hole 1331b can also be in the shape of a hole, and one or more can be provided. When multiple positive liquid inlet holes 1331b are provided therethrough, the multiple positive liquid inlet holes 1331b can be spaced around the periphery of the first floating hole 1331a and arranged at a certain interval in the circumferential direction. The first positive liquid inlet valve 1212 is floatingly inserted into the first floating hole 1331a. The first positive liquid inlet valve 1212 has an overall umbrella-shaped structure. The first positive liquid inlet valve 1212 includes a first rod portion 1212a and a first umbrella portion 1212b. The first rod portion 1212a is floatingly inserted into the first floating hole 1331a. The first umbrella portion 1212b is provided on the first rod portion 1212a and corresponds to one end close to the inner part of the positive liquid inlet cavity. The projection of the first umbrella portion 1212b on the plane perpendicular to the floating direction of the first positive liquid inlet valve 1212 can completely cover the positive liquid inlet hole 1331b, and during the floating process of the first positive liquid inlet valve 1212, the first umbrella portion 1212b can open or block the positive liquid inlet hole 1331b.

[0118] The first positive electrode liquid outlet 1332 includes a second floating hole 1332a provided therethrough and a positive electrode liquid outlet hole 1332b provided around the second floating hole 1332a. Similar to the positive electrode liquid inlet hole 1331b, the positive electrode liquid outlet hole 1332b can also be annular or in the shape of a hole. For specific details, reference can be made to the above description and will not be elaborated here. The first positive electrode liquid outlet valve 1213 is floatingly inserted into the second floating hole 1332a. The first positive electrode liquid outlet valve 1213 also has an umbrella-like structure. The first positive electrode liquid outlet valve 1213 includes a second rod portion 1213a and a second umbrella portion 1213b. The second rod portion 1213a is floatingly inserted into the second floating hole 1332a. The second umbrella portion 1213b is provided on the second rod portion 1213a and corresponds to one end away from the inner side of the positive electrode liquid outlet cavity. The projection of the second umbrella portion 1213b on a plane perpendicular to the floating direction of the first positive electrode liquid outlet valve 1213 can completely cover the positive electrode liquid outlet hole 1332b. During the floating process of the first positive electrode liquid outlet valve 1213, the second umbrella portion 1213b can open or block the positive electrode liquid outlet hole 1332b. With such a setting, as the first positive electrode piezoelectric sheet 1211 vibrates and deforms, the volume and pressure of the inner part of the positive electrode liquid outlet cavity change periodically. When the first umbrella portion 1212b opens the positive electrode liquid inlet hole 1331b, the second umbrella portion 1213b blocks the positive electrode liquid outlet hole 1332b, or when the first umbrella portion 1212b blocks the positive electrode liquid inlet hole 1331b, the second umbrella portion 1213b opens the positive electrode liquid outlet hole 1332b. Alternating in this way can achieve the one-way flow of the positive electrode electrolyte A.

[0119] In this embodiment, by providing the first positive electrode liquid inlet valve 1212 and the first positive electrode liquid outlet valve 1213, under the action of the vibration and deformation of the first positive electrode piezoelectric sheet 1211, the first positive electrode liquid inlet 1331 and the first positive electrode liquid outlet 1332 can be alternately opened and blocked, enabling the positive electrode electrolyte A to flow unidirectionally and realizing the circulation of the positive electrode electrolyte A.

[0120] In one embodiment, the positive electrode liquid outlet cavity 134 has a second positive electrode liquid inlet 1341 and a second positive electrode liquid outlet 1342. The positive electrode electrolyte A flows into the positive electrode liquid outlet cavity 134 through the second positive electrode liquid inlet 1341 and flows out of the positive electrode liquid outlet cavity 134 through the second positive electrode liquid outlet 1342.

[0121] The positive electrode liquid outlet piezoelectric structure 122 includes a second positive electrode piezoelectric sheet 1221, a second positive electrode liquid inlet valve 1222, and a second positive electrode liquid outlet valve 1223. Among them:

[0122] The second positive piezoelectric sheet 1221 is disposed in the positive liquid outlet chamber 134. The second positive piezoelectric sheet 1221 is configured to deform convexly away from the positive liquid outlet chamber 134 under the control of a positive driving signal, so that the positive electrolyte A enters the positive liquid outlet chamber 134 unidirectionally through the second positive liquid inlet 1341, or deform concavely towards the positive liquid outlet chamber 134 to cause the positive electrolyte A to flow out of the positive liquid outlet chamber 134 unidirectionally through the second positive liquid outlet 1342.

[0123] The second positive piezoelectric sheet 1221 divides the positive liquid outlet chamber 134 into two inner and outer parts. The part of the positive liquid outlet chamber 134 inside the second positive piezoelectric sheet 1221 (i.e., the side facing away from the third positive connection hole 136) is referred to as the "inner part of the positive liquid outlet chamber". Correspondingly, the part of the positive liquid outlet chamber 134 outside the second positive piezoelectric sheet 1221 (i.e., the side facing the third positive connection hole 136) is referred to as the "outer part of the positive liquid outlet chamber". The inner part of the positive liquid outlet chamber communicates with the positive reaction chamber 131. When the second positive piezoelectric sheet 1221 receives a positive driving signal, it will vibrate, causing the volume of the inner part of the positive liquid outlet chamber to change periodically. Under the cooperation of the second positive liquid inlet valve 1222 and the second positive liquid outlet valve 1223, the positive electrolyte A is unidirectionally transported along a first preset direction. The outer part of the positive liquid outlet chamber communicates with the third positive connection hole 136, so that the output lead connects the second positive piezoelectric sheet 1221 and the liquid flow energy storage management system 500, and further provides a positive driving signal to the second positive piezoelectric sheet 1221, causing the second positive piezoelectric sheet 1221 to deform under the drive of the positive driving signal.

[0124] The second positive liquid inlet valve 1222 is floatingly disposed at the second positive liquid inlet 1341 and can float relative to the second positive liquid inlet 1341; the second positive liquid outlet valve 1223 is floatingly disposed at the second positive liquid outlet 1342 and can float relative to the second positive liquid outlet 1342; the second positive liquid inlet valve 1222 and the second positive liquid outlet valve 1223 float synchronously with the vibration of the second positive piezoelectric sheet 1221 to achieve the unidirectional flow of the positive electrolyte A.

[0125] In this embodiment, the specific operation process and structure of the second positive piezoelectric sheet 1221, the second positive liquid inlet valve 1222, and the second positive liquid outlet valve 1223 are similar to those of the first positive piezoelectric sheet 1211, the first positive liquid inlet valve 1212, and the first positive liquid outlet valve 1213. For details, reference can be made to the description of the above embodiment, and this embodiment will not be elaborated here.

[0126] In this embodiment, by setting the second positive electrode liquid inlet valve 1222 and the second positive electrode liquid outlet valve 1223, under the vibration of the second positive electrode piezoelectric sheet 1221, the second positive electrode liquid inlet 1341 and the second positive electrode liquid outlet 1342 can be alternately opened and blocked, enabling the positive electrode electrolyte A to flow unidirectionally and finally return to the corresponding liquid storage tank, forming a primary liquid flow cycle and cycling in this way.

[0127] In one embodiment, please refer to Figure 1 and Figure 2 , the negative electrode mechanism 200 further includes a second plate - type structure 230. A negative electrode reaction cavity 231 is arranged inside the second plate - type structure 230, and the negative electrode assembly 210 is arranged inside the negative electrode reaction cavity 231. When the negative electrode electrolyte B flows into the negative electrode reaction cavity 231, an energy storage reaction occurs between the negative electrode electrolyte B and the negative electrode assembly 210 inside the negative electrode reaction cavity 231. Specifically, a second sealing area is arranged on the side of the second plate - type structure 230 facing the positive electrode mechanism 100. The other side of the ion - exchange membrane 400 is hermetically connected to the second plate - type structure 230, and the negative electrode reaction cavity 231 is formed inside the second sealing area.

[0128] In an exemplary embodiment, the second sealing area is a second sealing groove formed by concaving in the side of the second plate - type structure 230 facing the positive electrode mechanism 100. The side of the second plate - type structure 230 facing the positive electrode mechanism 100 contacts the corresponding side of the ion - exchange membrane 400, and a second sealing ring 320 is arranged between the second plate - type structure 230 and the ion - exchange membrane 400. The second sealing ring 320 and the second sealing groove together form a sealing structure, thereby forming a relatively closed negative electrode reaction cavity 231 to prevent the leakage of the negative electrode electrolyte B.

[0129] It can be understood that in some other embodiments, a sealing gasket, a sealing line, a heat - melting film, etc. can also be used between the second plate - type structure 230 and the ion - exchange membrane 400 to achieve sealing and form a sealing area to prevent the leakage of the negative electrode electrolyte B.

[0130] The negative electrode assembly 210 includes a negative electrode current collector plate 211 and a negative electrode plate 212. Among them:

[0131] The negative electrode plate 212 is fixedly arranged on one side of the negative current collector plate 211 facing the negative reaction cavity 231 to isolate the negative current collector plate 211 from the negative electrode electrolyte B and prevent the negative current collector plate 211 from contacting the negative electrode electrolyte B; the negative electrode plate 212 is electrically connected to the negative current collector plate 211, and the negative electrode plate 212 is used to react with the negative electrode electrolyte B to store energy when powered on. Specifically, the negative current collector plate 211 is arranged in the negative reaction cavity 231 and corresponds to the side away from the positive electrode mechanism 100 (or the ion exchange membrane 400), and the negative electrode plate 212 is arranged on the side of the negative current collector plate 211 facing the positive electrode mechanism 100, so that the negative electrode plate 212 can contact the negative electrode electrolyte B flowing into the negative reaction cavity 231 and react with the negative electrode electrolyte B to store energy when powered on.

[0132] In an optional embodiment, a first negative electrode connection hole 232 is arranged at a position corresponding to the negative reaction cavity 231 on the second plate - type structure body 230, and the first negative electrode connection hole 232 communicates the negative current collector plate 211 with the outside. The first negative electrode connection hole 232 is used to provide a channel for the output lead of the negative current collector plate 211, so that the negative current collector plate 211 can be connected to the external power supply system 600 to realize power - on of the negative electrode plate 212.

[0133] When the negative electrode electrolyte B enters the negative reaction cavity 231, it contacts the negative electrode plate 212 in the negative reaction cavity 231. The negative electrode plate 212 is electrically connected to the external power supply system 600 through the negative current collector plate 211, and after being powered on, it reacts with the negative electrode electrolyte B to store energy. At the same time, the target ions in the negative electrode electrolyte B migrate through the exchange channel constructed by the ion exchange membrane 400 to form a charge - discharge loop.

[0134] In this embodiment, by arranging the negative reaction cavity 231 in the second plate - type structure body 230 and integrating the negative electrode assembly 210 into the negative reaction cavity 231, the integration degree of the entire negative electrode mechanism 200 can be improved, thereby simplifying the structural form of the negative electrode mechanism 200.

[0135] In one embodiment, please refer to Figure 1 and Figure 3 , a negative electrode liquid inlet cavity 233 and a negative electrode liquid outlet cavity 234 are further arranged in the second plate - type structure body 230. The negative electrode liquid inlet cavity 233, the negative reaction cavity 231, and the negative electrode liquid outlet cavity 234 are sequentially communicated along the second preset direction to form a negative electrode liquid flow channel arranged along the second preset direction, so that when the negative electrode electrolyte B flows, it can enter the negative reaction cavity 231 through the negative electrode liquid inlet cavity 233, react with the negative electrode plate 212 in the negative reaction cavity 231, flow out through the negative electrode liquid outlet cavity 234, and finally return to the liquid storage tank, circulating in this way, thereby realizing the conversion between chemical energy and electrical energy.

[0136] The negative electrode drive assembly 220 includes a negative electrode inlet hydraulic-electrical structure 221 and a negative electrode outlet hydraulic-electrical structure 222. Among them:

[0137] The negative electrode inlet hydraulic-electrical structure 221 is disposed in the negative electrode inlet liquid chamber 233. The negative electrode inlet hydraulic-electrical structure 221 is configured to control the negative electrode electrolyte B to flow into the negative electrode reaction chamber 231 through the negative electrode inlet liquid chamber 233 under the drive of a negative electrode drive signal. The negative electrode outlet hydraulic-electrical structure 222 is disposed in the negative electrode outlet liquid chamber 234; the negative electrode outlet hydraulic-electrical structure 222 is configured to control the negative electrode electrolyte B to flow out of the negative electrode reaction chamber 231 through the negative electrode outlet liquid chamber 234 under the drive of a negative electrode drive signal.

[0138] In an optional embodiment, a second negative electrode connection hole 235 is provided at a position corresponding to the negative electrode inlet liquid chamber 233 on the second plate-like structure body 230, for providing a channel for the output lead of the negative electrode inlet hydraulic-electrical structure 221, so that the negative electrode inlet hydraulic-electrical structure 221 can be connected to an external liquid flow energy storage management system 500 to access the corresponding negative electrode drive signal. A third negative electrode connection hole 236 is also provided at a position corresponding to the negative electrode outlet liquid chamber 234 on the second plate-like structure body 230, for providing a channel for the output lead of the negative electrode outlet hydraulic-electrical structure 222, so that the negative electrode outlet hydraulic-electrical structure 222 can be connected to an external liquid flow energy storage management system 500 to access the corresponding negative electrode drive signal.

[0139] When the negative electrode mechanism 200 is working, the liquid flow energy storage management system 500 respectively provides corresponding negative electrode drive signals to the negative electrode inlet hydraulic-electrical structure 221 and the negative electrode outlet hydraulic-electrical structure 222, so that the negative electrode electrolyte B enters the negative electrode inlet liquid chamber 233 under the action of the negative electrode inlet hydraulic-electrical structure 221. And with the continuous action of the negative electrode inlet hydraulic-electrical structure 221, the negative electrode electrolyte B enters the negative electrode reaction chamber 231 from the negative electrode inlet liquid chamber 233. After reacting with the negative electrode plate 212 in the negative electrode reaction chamber 231, the negative electrode outlet hydraulic-electrical structure 222 controls the negative electrode electrolyte B in the negative electrode reaction chamber 231 to flow into the negative electrode outlet liquid chamber 234 under the drive of the negative electrode drive signal. And with the continuous action of the negative electrode outlet hydraulic-electrical structure 222, the negative electrode electrolyte B flows out of the negative electrode outlet liquid chamber 234 and finally returns to the liquid storage tank, and so on in a cycle.

[0140] In this embodiment, by integrating the negative electrode inlet hydraulic power generation structure 221 and the negative electrode outlet hydraulic power generation structure 222 within the second plate-like structure 230, the negative electrode drive signal is used to control the separate operations of the negative electrode inlet hydraulic power generation structure 221 and the negative electrode outlet hydraulic power generation structure 222, so as to dynamically change the pressure in the negative electrode inlet liquid chamber 233 and the negative electrode outlet liquid chamber 234 (forming local negative pressure or pushing pressure), thereby providing power for the flow of the negative electrode electrolyte B in the negative electrode inlet liquid chamber 233, the negative electrode reaction chamber 231, and the negative electrode outlet liquid chamber 234, and realizing the directional flow of the negative electrode electrolyte B. In this embodiment, there is no need to additionally set up a power pump, thus reducing the energy loss during the flow of the negative electrode electrolyte B and being beneficial to improving the energy efficiency of the liquid flow energy storage device.

[0141] In one embodiment, please refer to Figure 3 and Figure 5 , the negative electrode inlet liquid chamber 233 has a first negative electrode inlet 2331 and a first negative electrode outlet 2332. The negative electrode electrolyte B flows into the negative electrode inlet liquid chamber 233 through the first negative electrode inlet 2331 and flows out of the negative electrode inlet liquid chamber 233 through the first negative electrode outlet 2332.

[0142] The negative electrode inlet hydraulic power generation structure 221 includes a first negative electrode piezoelectric sheet 2211, a first negative electrode inlet valve 2212, and a first negative electrode outlet valve 2213. Among them:

[0143] The first negative electrode piezoelectric sheet 2211 is arranged in the negative electrode inlet liquid chamber 233. The first negative electrode piezoelectric sheet 2211 divides the negative electrode inlet liquid chamber 233 into two parts inside and outside. The first negative electrode piezoelectric sheet 2211 is used to deform convexly away from the negative electrode inlet liquid chamber 233 under the control of the negative electrode drive signal to enable the negative electrode electrolyte B to enter the negative electrode inlet liquid chamber 233 unidirectionally through the first negative electrode inlet 2331, or deform concavely towards the negative electrode inlet liquid chamber 233 to enable the negative electrode electrolyte B to flow out of the negative electrode inlet liquid chamber 233 unidirectionally through the first negative electrode outlet 2332.

[0144] The part of the negative electrode liquid inlet chamber 233 on the inner side of the first negative electrode piezoelectric sheet 2211 (i.e., the side facing away from the second negative electrode connection hole 235) is referred to as the "inner part of the negative electrode liquid inlet chamber". Correspondingly, the part of the negative electrode liquid inlet chamber 233 on the outer side of the first negative electrode piezoelectric sheet 2211 (i.e., the side facing the second negative electrode connection hole 235) is referred to as the "outer part of the negative electrode liquid inlet chamber". The inner part of the negative electrode liquid inlet chamber is communicated with the negative electrode reaction chamber 231. When the first negative electrode piezoelectric sheet 2211 receives a negative electrode driving signal, it will vibrate, causing the volume of the inner part of the negative electrode liquid inlet chamber to change periodically. Under the cooperation of the first negative electrode liquid inlet valve 2212 and the first negative electrode liquid outlet valve 2213, the negative electrode electrolyte B is unidirectionally transported along the second preset direction. The outer part of the negative electrode liquid inlet chamber is communicated with the second negative electrode connection hole 235, so that the output lead connects the first negative electrode piezoelectric sheet 2211 and the liquid flow energy storage management system 500, and then provides a negative electrode driving signal to the first negative electrode piezoelectric sheet 2211, causing the first negative electrode piezoelectric sheet 2211 to deform under the drive of the negative electrode driving signal.

[0145] The first negative electrode liquid inlet valve 2212 is floatingly arranged at the first negative electrode liquid inlet 2331 and can float relative to the first negative electrode liquid inlet 2331; the first negative electrode liquid outlet valve 2213 is floatingly arranged at the first negative electrode liquid outlet 2332 and can float relative to the first negative electrode liquid outlet 2332; the first negative electrode liquid inlet valve 2212 and the first negative electrode liquid outlet valve 2213 float synchronously with the local negative pressure or pushing pressure generated by the deformation of the first negative electrode piezoelectric sheet 2211 to realize the entry or outflow of the negative electrode electrolyte B into or out of the positive electrode liquid inlet chamber.

[0146] When the first negative electrode piezoelectric sheet 2211 deforms under the drive of the negative electrode driving signal, when the first negative electrode piezoelectric sheet 2211 bulges outward towards the outer part of the negative electrode liquid inlet chamber, the volume of the corresponding inner part of the negative electrode liquid inlet chamber in the negative electrode liquid inlet chamber 233 increases to generate a local negative pressure, causing the first negative electrode liquid inlet valve 2212 to move towards the inner part of the negative electrode liquid inlet chamber to open the first negative electrode liquid inlet 2331, so that the negative electrode electrolyte B can enter the inner part of the negative electrode liquid inlet chamber through the first negative electrode liquid inlet 2331; at the same time, due to the action of the local negative pressure generated by the inner part of the negative electrode liquid inlet chamber, the first negative electrode liquid outlet valve 2213 blocks the first negative electrode liquid outlet 2332 to limit the outflow of the negative electrode electrolyte B from the first negative electrode liquid outlet 2332.

[0147] When the first negative piezoelectric sheet 2211 deforms under the drive of the negative drive signal, when the first negative piezoelectric sheet 2211 concaves inward towards the inner part of the negative liquid inlet cavity (i.e., during reverse reset), the volume of the corresponding inner part of the negative liquid inlet cavity 233 in the negative liquid inlet cavity decreases, generating a local pushing pressure. At this time, the first negative liquid inlet valve 2212 blocks the first negative liquid inlet 2331 under the action of the pushing pressure to limit the inflow of the negative electrolyte B through the first negative liquid inlet 2331. At the same time, the negative electrolyte B in the inner part of the negative liquid inlet cavity pushes the first negative liquid outlet valve 2213 and moves synchronously away from the inner part of the negative liquid inlet cavity to open the first negative liquid outlet 2332, enabling the negative electrolyte B to flow out of the inner part of the negative liquid inlet cavity through the first negative liquid outlet 2332 and enter the negative reaction cavity 231. With the vibration of the first negative piezoelectric sheet 2211, the volume and pressure of the inner part of the negative liquid inlet cavity change periodically, and further, the first negative liquid inlet valve 2212 and the first negative liquid outlet valve 2213 periodically and alternately open and block the first negative liquid inlet 2331 and the first negative liquid outlet 2332, thus realizing the unidirectional flow of the negative electrolyte B.

[0148] In an exemplary embodiment, the first negative liquid inlet 2331 includes a third floating hole 2331a penetrating therethrough and a negative liquid inlet hole 2331b penetrating around the third floating hole 2331a. The negative liquid inlet hole 2331b is annular and spaced around the periphery of the third floating hole 2331a. The negative liquid inlet hole 2331b can also be in the shape of a hole, and one or more can be provided. When there are multiple negative liquid inlet holes 2331b penetrating, the multiple negative liquid inlet holes 2331b can be spaced around the periphery of the third floating hole 2331a and arranged at a certain interval in the circumferential direction. The first negative liquid inlet valve 2212 floats through the third floating hole 2331a. The first negative liquid inlet valve 2212 has an overall umbrella-like structure. The first negative liquid inlet valve 2212 includes a third rod portion 2212a and a third umbrella portion 2212b. The third rod portion 2212a floats through the third floating hole 2331a. The third umbrella portion 2212b is provided on the third rod portion 2212a and corresponds to one end close to the inner part of the negative liquid inlet cavity. The projection of the third umbrella portion 2212b on the plane perpendicular to the floating direction of the first negative liquid inlet valve 2212 can completely cover the negative liquid inlet hole 2331b, and during the floating process of the first negative liquid inlet valve 2212, the third umbrella portion 2212b can open or block the negative liquid inlet hole 2331b.

[0149] The first negative electrode liquid outlet 2332 includes a fourth floating hole 2332a penetratingly provided and a negative electrode liquid outlet hole 2332b penetratingly provided around the fourth floating hole 2332a. Similar to the negative electrode liquid inlet hole 2331b, the negative electrode liquid outlet hole 2332b can also be annular or hole-shaped. For specific details, reference can be made to the above description and will not be elaborated here. The first negative electrode liquid outlet valve 2213 is floatingly inserted into the fourth floating hole 2332a. The first negative electrode liquid outlet valve 2213 also has an umbrella-like structure. The first negative electrode liquid outlet valve 2213 includes a fourth rod portion 2213a and a fourth umbrella portion 2213b. The fourth rod portion 2213a is floatingly inserted into the fourth floating hole 2332a. The fourth umbrella portion 2213b is provided on the fourth rod portion 2213a and corresponds to one end far from the inner side of the negative electrode liquid outlet cavity. The projection of the fourth umbrella portion 2213b on the plane perpendicular to the floating direction of the first negative electrode liquid outlet valve 2213 can completely cover the negative electrode liquid outlet hole 2332b. During the floating process of the first negative electrode liquid outlet valve 2213, the fourth umbrella portion 2213b can open or block the negative electrode liquid outlet hole 2332b. With such a setting, as the first negative electrode piezoelectric sheet 2211 vibrates and deforms, the volume and pressure of the inner part of the negative electrode liquid outlet cavity change periodically. When the third umbrella portion 2212b opens the negative electrode liquid inlet hole 2331b, the fourth umbrella portion 2213b blocks the negative electrode liquid outlet hole 2332b, or when the third umbrella portion 2212b blocks the negative electrode liquid inlet hole 2331b, the fourth umbrella portion 2213b opens the negative electrode liquid outlet hole 2332b. Alternating in this way can achieve the one-way flow of the negative electrode electrolyte B.

[0150] In this embodiment, by providing the first negative electrode liquid inlet valve 2212 and the first negative electrode liquid outlet valve 2213, the first negative electrode liquid inlet 2331 and the first negative electrode liquid outlet 2332 can be alternately opened and blocked under the action of the vibration and deformation of the first negative electrode piezoelectric sheet 2211, so that the negative electrode electrolyte B can flow unidirectionally, realizing the circulation of the negative electrode electrolyte B.

[0151] In one embodiment, the negative electrode liquid outlet cavity 234 has a second negative electrode liquid inlet 2341 and a second negative electrode liquid outlet 2342. The negative electrode electrolyte B flows into the negative electrode liquid outlet cavity 234 through the second negative electrode liquid inlet 2341 and flows out of the negative electrode liquid outlet cavity 234 through the second negative electrode liquid outlet 2342.

[0152] The negative electrode liquid outlet piezoelectric structure 222 includes a second negative electrode piezoelectric sheet 2221, a second negative electrode liquid inlet valve 2222, and a second negative electrode liquid outlet valve 2223. Among them:

[0153] The second negative piezoelectric sheet 2221 is disposed in the negative liquid outlet cavity 234. The second negative piezoelectric sheet 2221 is configured to deform convexly away from the negative liquid outlet cavity 234 under the control of a negative driving signal, so that the negative electrolyte B enters the negative liquid outlet cavity 234 unidirectionally through the second negative liquid inlet 2341, or deform concavely towards the negative liquid outlet cavity 234 to enable the negative electrolyte B to flow out of the negative liquid outlet cavity 234 unidirectionally through the second negative liquid outlet 2342.

[0154] The second negative piezoelectric sheet 2221 divides the negative liquid outlet cavity 234 into two inner and outer parts. The part of the negative liquid outlet cavity 234 inside the second negative piezoelectric sheet 2221 (i.e., the side facing away from the third negative connection hole 236) is referred to as the "inner part of the negative liquid outlet cavity". Correspondingly, the part of the negative liquid outlet cavity 234 outside the second negative piezoelectric sheet 2221 (i.e., the side facing the third negative connection hole 236) is referred to as the "outer part of the negative liquid outlet cavity". The inner part of the negative liquid outlet cavity communicates with the negative reaction cavity 231. When the second negative piezoelectric sheet 2221 receives a negative driving signal, it will vibrate, causing the volume of the inner part of the negative liquid outlet cavity to change periodically. With the cooperation of the second negative liquid inlet valve 2222 and the second negative liquid outlet valve 2223, the negative electrolyte B is unidirectionally transported along the first preset direction. The outer part of the negative liquid outlet cavity communicates with the third negative connection hole 236, so that the output lead connects the second negative piezoelectric sheet 2221 and the liquid flow energy storage management system 500, and further provides a negative driving signal to the second negative piezoelectric sheet 2221, causing the second negative piezoelectric sheet 2221 to deform under the drive of the negative driving signal.

[0155] The second negative liquid inlet valve 2222 is floatingly disposed at the second negative liquid inlet 2341 and can float relative to the second negative liquid inlet 2341; the second negative liquid outlet valve 2223 is floatingly disposed at the second negative liquid outlet 2342 and can float relative to the second negative liquid outlet 2342; the second negative liquid inlet valve 2222 and the second negative liquid outlet valve 2223 float synchronously with the vibration of the second negative piezoelectric sheet 2221 to achieve the unidirectional flow of the negative electrolyte B.

[0156] In this embodiment, the specific operation process and structure of the second negative piezoelectric sheet 2221, the second negative liquid inlet valve 2222, and the second negative liquid outlet valve 2223 are similar to those of the first negative piezoelectric sheet 2211, the first negative liquid inlet valve 2212, and the first negative liquid outlet valve 2213. For details, reference can be made to the description of the above embodiment, and this embodiment will not be elaborated here.

[0157] In this embodiment, by setting the second negative electrode liquid inlet valve 2222 and the second negative electrode liquid outlet valve 2223, under the vibration of the second negative electrode piezoelectric sheet 2221, the second negative electrode liquid inlet 2341 and the second negative electrode liquid outlet 2342 can be alternately opened and blocked, enabling the negative electrode electrolyte B to flow unidirectionally and finally return to the corresponding liquid storage tank, forming a primary liquid flow cycle and cycling in this way.

[0158] In one embodiment, please refer to Figure 6 , the above liquid flow energy storage stack includes a plurality of liquid flow energy storage units connected in parallel longitudinally. Among them, the longitudinal direction refers to the stacking direction of the liquid flow energy storage units from bottom to top, that is, Figure 6 the Z-axis direction in

[0159] Specifically, each liquid flow energy storage unit is provided with a positive electrode liquid inlet manifold, a positive electrode liquid outlet manifold, a negative electrode liquid inlet manifold, and a negative electrode liquid outlet manifold; each liquid flow energy storage unit is independent of each other. Each positive electrode liquid inlet manifold is connected through a positive electrode main liquid inlet pipe, and each positive electrode liquid outlet manifold is connected through a positive electrode main liquid outlet pipe. Also, each negative electrode liquid inlet manifold is connected through a negative electrode main liquid inlet pipe, and each negative electrode liquid outlet manifold is connected through a negative electrode main liquid outlet pipe, enabling the reaction chambers of each liquid flow energy storage unit to independently undergo an energy storage reaction with the flowing electrolyte. More specifically, the positive electrode liquid inlet manifold and the positive electrode liquid outlet manifold are arranged on each positive electrode mechanism 100. Each positive electrode liquid inlet manifold is commonly connected to a positive electrode main liquid inlet pipe, and each positive electrode liquid outlet manifold is commonly connected to a positive electrode main liquid outlet pipe, enabling the positive electrode electrolyte A to be split into each positive electrode liquid inlet manifold through the positive electrode main liquid inlet pipe, and flow into each positive electrode mechanism 100 through each positive electrode liquid inlet manifold respectively. After undergoing an energy storage reaction with the positive electrode plate 112 in the corresponding positive electrode reaction chamber 131 respectively, it flows out through each positive electrode liquid outlet manifold respectively, and then converges at the positive electrode main liquid outlet pipe and enters the next cycle. Similarly, the negative electrode liquid inlet manifold and the negative electrode liquid outlet manifold are arranged on each negative electrode mechanism 200. Each negative electrode liquid inlet manifold is commonly connected to a negative electrode main liquid inlet pipe, and each negative electrode liquid outlet manifold is commonly connected to a negative electrode main liquid outlet pipe, enabling the negative electrode electrolyte B to be split into each negative electrode liquid inlet manifold through the negative electrode main liquid inlet pipe, and flow into each negative electrode mechanism 200 through each negative electrode liquid inlet manifold respectively. After undergoing an energy storage reaction with the negative electrode plate 212 in the corresponding negative electrode reaction chamber 231 respectively, it flows out through each negative electrode liquid outlet manifold respectively, converges at the negative electrode main liquid outlet pipe and enters the next cycle.

[0160] In this embodiment, by arranging a plurality of liquid flow energy storage units connected in parallel longitudinally, and the plurality of liquid flow energy storage units synchronously undergo an energy storage reaction with the electrolyte, the energy storage efficiency of the liquid flow energy storage stack can be improved.

[0161] In one embodiment, please refer to Figure 7 and Figure 8, the liquid flow energy storage stack includes a plurality of liquid flow energy storage units connected in parallel vertically. Herein, the vertical direction refers to the side-by-side direction of the liquid flow energy storage units from front to back or from back to front, that is, Figure 7 and Figure 8 the Y-axis direction in

[0162] . Specifically, each liquid flow energy storage unit is provided with a positive electrode inlet manifold, a positive electrode outlet manifold, a negative electrode inlet manifold, and a negative electrode outlet manifold. The structures and principles of the positive electrode inlet manifold, the positive electrode outlet manifold, the negative electrode inlet manifold, and the negative electrode outlet manifold can be referred to the descriptions in the above embodiments, and will not be elaborated in this embodiment.

[0163] In an exemplary embodiment, the positive electrode reaction chambers 131 are sequentially connected in the vertical direction to form a positive electrode common reaction chamber 140. Each positive electrode inlet chamber 133 is connected to the positive electrode common reaction chamber 140. The positive electrode plates 112 of each positive electrode assembly 110 are disposed in the positive electrode common reaction chamber 140. When the positive electrode electrolyte A enters the positive electrode inlet chamber 133 through their respective corresponding positive electrode inlet manifolds, the positive electrode electrolyte A in each positive electrode inlet chamber 133 is pumped into the positive electrode common reaction chamber 140 through the vibration of the first positive electrode piezoelectric sheet 1211 and the second positive electrode piezoelectric sheet 1221. After the positive electrode electrolyte A reacts with at least one positive electrode plate 112 in the positive electrode common reaction chamber 140, the positive electrode electrolyte A in the positive electrode common reaction chamber 140 is respectively flowed into the positive electrode outlet chamber 134 through the vibration of the first positive electrode piezoelectric sheet 1211 and the second positive electrode piezoelectric sheet 1221, and then flows out of the positive electrode outlet chamber 134 through their respective corresponding positive electrode outlet manifolds, and converges at the positive electrode main outlet pipe and finally returns to the liquid storage tank, so as to circulate.

[0164] The negative electrode reaction chambers 231 are sequentially connected in the vertical direction to form a negative electrode common reaction chamber 240. The negative electrode common reaction chamber 240 is isolated from the positive electrode common reaction chamber 140 by a common ion exchange membrane 400. Each negative electrode inlet chamber 233 is connected to the negative electrode common reaction chamber 240. The negative electrode plates 212 of each negative electrode assembly 210 are disposed in the negative electrode common reaction chamber 240. When the negative electrode electrolyte B enters the negative electrode inlet chamber 233 through their respective corresponding negative electrode inlet manifolds, the negative electrode electrolyte B in each negative electrode inlet chamber 233 is pumped into the negative electrode common reaction chamber 240 through the vibration of the first negative electrode piezoelectric sheet 2211 and the second negative electrode piezoelectric sheet 2221. After the negative electrode electrolyte B reacts with at least one negative electrode plate 212 in the negative electrode common reaction chamber 240, the negative electrode electrolyte B in the negative electrode common reaction chamber 240 is respectively flowed into the negative electrode outlet chamber 234 through the vibration of the first negative electrode piezoelectric sheet 2211 and the second negative electrode piezoelectric sheet 2221, and then flows out of the negative electrode outlet chamber 234 through their respective corresponding negative electrode outlet manifolds, and converges at the negative electrode main outlet pipe and finally returns to the liquid storage tank, so as to circulate.

[0165] In this embodiment, by arranging a plurality of parallel-flow liquid energy storage units vertically, the plurality of liquid energy storage units have a positive electrode common reaction chamber 140 and a negative electrode common reaction chamber 240. A plurality of positive electrode mechanisms 100 share one positive electrode common reaction chamber 140, and a plurality of negative electrode mechanisms 200 share one negative electrode common reaction chamber 240, so as to increase the input and output flow rates and pressures of the liquid energy storage stack and increase the reaction area, thereby further improving the energy storage efficiency of the liquid energy storage stack.

[0166] In one embodiment, please refer to Figure 9 , the liquid energy storage stack includes a plurality of liquid energy storage units arranged in an array. The connection modes of the plurality of liquid energy storage units include at least one of being connected in series in the horizontal direction, being connected in parallel in the vertical direction, and being connected in parallel in the longitudinal direction, and the horizontal, vertical, and longitudinal directions are pairwise orthogonal. Among them, the horizontal direction refers to the horizontal direction, that is, the side-by-side direction of the liquid energy storage units from left to right or from right to left, that is, Figure 9 the X-axis direction in

[0167] Specifically, taking the example where multiple liquid flow energy storage units are arranged both horizontally, vertically, and longitudinally, in the longitudinal and vertical directions, each liquid flow energy storage unit is connected in parallel. For the specific connection method and the flow process of the electrolyte, reference can be made to the description in the above embodiments, and details will not be elaborated in this embodiment. Horizontally, each liquid flow energy storage unit is connected in series. Taking the positive electrode mechanism 100 as an example, when the positive electrode electrolyte A flows into the positive electrode mechanism 100 of the first column, it undergoes an energy storage reaction with each positive electrode plate 112 in the positive electrode mechanism 100 of the first column, and then sequentially flows into the positive electrode mechanisms 100 of the subsequent columns, and sequentially undergoes energy storage reactions with the positive electrode plates 112 in the positive electrode mechanisms 100 of each column until it flows out of the positive electrode mechanism 100 of the last column and finally returns to the liquid storage tank, cycling in this way. More specifically, for multiple liquid flow energy storage units connected in series horizontally in any row, the positive electrode electrolyte A is driven by the cooperation of the first positive electrode piezoelectric sheet 1211 and the second positive electrode piezoelectric sheet 1221 and sequentially flows into the positive electrode inlet chamber 133 of the positive electrode mechanism 100 of the first column through the positive electrode main inlet pipe and the positive electrode inlet manifold, and flows into the positive electrode reaction chamber 131 of the positive electrode mechanism 100 of the first column under the continuous action of the first positive electrode piezoelectric sheet 1211 and the second positive electrode piezoelectric sheet 1221. After undergoing an energy storage reaction with the positive electrode plate 112 in the positive electrode reaction chamber 131 of the positive electrode mechanism 100 of the first column, it flows into the positive electrode outlet chamber 134 of the positive electrode mechanism 100 of the first column. Subsequently, the positive electrode electrolyte A flows out of the positive electrode outlet chamber 134 of the positive electrode mechanism 100 of the first column and, under the action of the corresponding first positive electrode piezoelectric sheet 1211 and the second positive electrode piezoelectric sheet 1221, flows into the positive electrode inlet chamber 133 of the positive electrode mechanism 100 of the second column through the manifold or flow channel between the positive electrode mechanism 100 of the first column and the positive electrode mechanism 100 of the second column, and sequentially flows through the positive electrode reaction chamber 131 and the positive electrode outlet chamber 134 of the positive electrode mechanism 100 of the second column according to the foregoing process until it flows out of the positive electrode outlet chamber 134 of the positive electrode mechanism 100 of the last column to the positive electrode outlet manifold, and then converges with the positive electrode electrolyte A flowing out of other rows at the positive electrode main outlet pipe and finally returns to the liquid storage tank, cycling in this way. The flow process of the negative electrode electrolyte B in the negative electrode mechanism 200 is similar to that of the positive electrode, and specific reference can be made to the foregoing description, and details will not be elaborated here.

[0168] In addition, after the positive electrode electrolyte A undergoes an energy storage reaction on the positive electrode mechanism 100 of the first column, if there are multiple parallel positive electrode mechanisms 100 of the second column, at this time, the positive electrode electrolyte A can be respectively diverted into each positive electrode mechanism 100 of the second column for energy storage reaction and then flow backward sequentially until it flows out of the positive electrode outlet chamber 134 of the positive electrode mechanism 100 of the last column to the positive electrode outlet manifold, and then converges with the positive electrode electrolyte A flowing out of other rows at the positive electrode main outlet pipe and finally returns to the liquid storage tank, cycling in this way.

[0169] In this embodiment, a plurality of liquid flow energy storage units are arranged both horizontally, vertically and longitudinally. Horizontally, the liquid flow energy storage units are connected in series; vertically, the liquid flow energy storage units are connected in parallel; and longitudinally, the liquid flow energy storage units are connected in parallel. In this way, the corresponding number of liquid flow energy storage units can be set as needed to increase the flexibility of the use of the liquid flow energy storage device.

[0170] In one embodiment, the positive electrode mechanism 100 has a positive electrode reaction cavity 131, a plurality of positive electrode inlet cavities 133 communicating with the positive electrode reaction cavity 131, and a plurality of positive electrode outlet cavities 134 communicating with the positive electrode reaction cavity 131; the positive electrode assembly 110 is arranged in the positive electrode reaction cavity 131, and the positive electrode driving assembly 120 includes positive electrode inlet piezoelectric structures 121 correspondingly arranged in each positive electrode inlet cavity 133 and positive electrode outlet piezoelectric structures 122 correspondingly arranged in each positive electrode outlet cavity 134; the negative electrode mechanism 200 has a negative electrode reaction cavity 231, a plurality of negative electrode inlet cavities 233 communicating with the negative electrode reaction cavity 231, and a plurality of negative electrode outlet cavities 234 communicating with the negative electrode reaction cavity 231; the negative electrode assembly 210 is arranged in the negative electrode reaction cavity 231, and the negative electrode driving assembly 220 includes negative electrode inlet piezoelectric structures 221 correspondingly arranged in each negative electrode inlet cavity 233 and negative electrode outlet piezoelectric structures 222 correspondingly arranged in each negative electrode outlet cavity 234.

[0171] In an exemplary embodiment, please refer to Figure 10 , for any one liquid flow energy storage unit, taking the positive electrode mechanism 100 as an example, each positive electrode reaction cavity 131 is connected with three positive electrode inlet cavities 133 and three positive electrode outlet cavities 134. The positive electrode inlet cavities 133 are communicated in sequence, and the positive electrode outlet cavities 134 are communicated in sequence. With such an arrangement, the positive electrode electrolyte A enters the positive electrode reaction cavity 131 synchronously through a plurality of positive electrode inlet cavities 133 and flows out of the positive electrode reaction cavity 131 synchronously to each positive electrode outlet cavity 134, which is beneficial to increasing the reaction area of the positive electrode reaction cavity 131, thereby improving the energy storage capacity per unit time. Specifically, when implemented, the number of the positive electrode inlet cavities 133 and the positive electrode outlet cavities 134 can be comprehensively determined according to the reaction area of the positive electrode plate 112 in the positive electrode reaction cavity 131, and the number and area of the positive electrode inlet cavities 133 and the positive electrode outlet cavities 134 can be the same or different, but the positive electrode inlet and outlet cavities are symmetrically arranged. According to the number and spatial arrangement mode of the positive electrode inlet and outlet cavities, the distribution channels between the positive electrode inlet and outlet cavities and the distribution channels between the positive electrode inlet and outlet cavities and the positive electrode reaction cavity 131 are set. Specifically, this embodiment is not limited.

[0172] In one embodiment, please refer to Figure 11 and Figure 12, the liquid flow energy storage stack includes a plurality of liquid flow energy storage units distributed in an array. The connection modes of the plurality of liquid flow energy storage units include at least one of being connected in series in the horizontal direction, being connected in parallel in the vertical direction, and being connected in parallel in the longitudinal direction, and the horizontal, vertical, and longitudinal directions are pairwise orthogonal. Among the adjacent two positive electrode mechanisms connected in series, the positive electrode liquid outlet cavity of the positive electrode mechanism at the head end is communicated with the positive electrode liquid inlet cavity of the positive electrode mechanism at the tail end. Among the adjacent two negative electrode mechanisms connected in series, the negative electrode liquid outlet cavity of the negative electrode mechanism at the head end is communicated with the negative electrode liquid inlet cavity of the negative electrode mechanism at the tail end. Among the adjacent two positive electrode mechanisms connected in parallel, each positive electrode liquid inlet cavity is sequentially communicated, and each positive electrode liquid outlet cavity is sequentially communicated. Among the adjacent two negative electrode mechanisms connected in parallel, each negative electrode liquid inlet cavity is sequentially communicated, and each negative electrode liquid outlet cavity is sequentially communicated. For the energy storage units with a parallel relationship with each other, when a certain energy storage unit has a problem, through the setting of the positive and negative electrode drive components, this energy storage unit can be closed, and the normal operation of the remaining energy storage units in the energy storage stack can be realized. From this perspective, it has unique advantages to develop an energy storage stack unit with an independent reaction chamber, independent liquid inlet and outlet chambers, and stacking the energy storage units as much as possible in the vertical and longitudinal directions, and finally realize the integration between the energy storage units.

[0173] Specifically, the connection modes of the liquid flow energy storage units in the horizontal, vertical, and longitudinal directions and the flow process of the electrolyte can be referred to the description of the above embodiments, and will not be elaborated in this embodiment.

[0174] As Figure 13 shown, another embodiment of the present invention provides a liquid flow energy storage device, including a liquid flow energy storage stack and a liquid flow energy storage management system 500; wherein:

[0175] The liquid flow energy storage stack is the liquid flow energy storage stack described in the above embodiments, and the specific structure can be referred to the description of the above embodiments, and will not be elaborated in this embodiment. Specifically, when implemented, the liquid flow energy storage stack may include, but is not limited to, a liquid flow energy storage battery, a liquid flow energy storage capacitor, and other stack structures that can realize the conversion between chemical energy and electrical energy through the liquid flow energy storage method.

[0176] The liquid flow energy storage management system 500 is connected to each positive electrode drive component 120 and each negative electrode drive component 220. The liquid flow energy storage management system 500 is used to generate a positive electrode drive signal and a negative electrode drive signal to drive the positive electrode drive component 120 and the negative electrode drive component 220 to control the corresponding electrolyte to flow along a preset direction.

[0177] In an exemplary embodiment, each positive electrode inlet piezoelectric structure 121 and each positive electrode outlet piezoelectric structure 122 are both connected to the liquid flow energy storage management system 500 to correspondingly access the positive electrode drive signal generated by the liquid flow energy storage management system 500. Specifically, the first positive electrode piezoelectric sheet 1211 and the second positive electrode piezoelectric sheet 1221 are both electrically connected to the liquid flow energy storage management system 500 through wires, so that the positive electrode drive signal generated by the liquid flow energy storage management system 500 can act on the first positive electrode piezoelectric sheet 1211 and the second positive electrode piezoelectric sheet 1221, and further enable the first positive electrode piezoelectric sheet 1211 and the second positive electrode piezoelectric sheet 1221 to vibrate, providing power for the flow of the positive electrode electrolyte A.

[0178] In an exemplary embodiment, each negative electrode inlet piezoelectric structure 221 and each negative electrode outlet piezoelectric structure 222 are both connected to the liquid flow energy storage management system 500 to correspondingly access the negative electrode drive signal generated by the liquid flow energy storage management system 500. Specifically, the first negative electrode piezoelectric sheet 2211 and the second negative electrode piezoelectric sheet 2221 are both electrically connected to the liquid flow energy storage management system 500 through wires, so that the negative electrode drive signal generated by the liquid flow energy storage management system 500 can act on the first negative electrode piezoelectric sheet 2211 and the second negative electrode piezoelectric sheet 2221, and further enable the first negative electrode piezoelectric sheet 2211 and the second negative electrode piezoelectric sheet 2221 to vibrate, providing power for the flow of the negative electrode electrolyte B.

[0179] In one embodiment, please continue to refer to Figure 13 , the above liquid flow energy storage device further includes a power supply system 600. Among them:

[0180] The power supply system 600 is connected to each positive electrode assembly 110 and each negative electrode assembly 210. The power supply system 600 is used to supply power to each positive electrode assembly 110 and each negative electrode assembly 210, so that each positive electrode assembly 110 and each negative electrode assembly 210 undergo an energy storage reaction with the corresponding electrolyte. Specifically, the power supply system 600 is electrically connected to the positive electrode current collector plate 111 and the negative electrode current collector plate 211 through wires respectively, providing electrical energy for the energy storage reaction between the positive electrode plate 112 and the positive electrode electrolyte A and the energy storage reaction between the negative electrode plate 212 and the negative electrode electrolyte B, and collecting electrical energy from the current collector plate during the energy release process.

[0181] In one embodiment, please continue to refer to Figure 13 , the above liquid flow energy storage device further includes a positive electrode circulation loop 700. Among them:

[0182] The positive electrode circulation loop 700 is connected to the positive electrode mechanism 100 and is used to circulate and supply the positive electrode electrolyte A to the positive electrode mechanism 100, so that the positive electrode electrolyte A undergoes an energy storage reaction with the positive electrode assembly 110 during the circulation process.

[0183] In an alternative embodiment, please refer toFigure 1 Moreover, the first plate - type structure 130 is further provided with a positive - electrode liquid inlet channel 150 communicating with the positive - electrode liquid inlet chamber 133 and a positive - electrode liquid outlet channel 160 communicating with the positive - electrode liquid outlet chamber 134; the positive - electrode circulation loop 700 is communicated with both the positive - electrode liquid inlet channel 150 and the positive - electrode liquid outlet channel 160, to supply the positive - electrode electrolyte A to the positive - electrode mechanism 100, and to recover the positive - electrode electrolyte A after the energy - storage reaction occurs between the positive - electrode electrolyte A and the positive - electrode plate 112, so as to realize the circulation of the positive - electrode electrolyte A.

[0184] In one embodiment, please continue to refer to Figure 13 The above - mentioned liquid - flow energy - storage device further includes a negative - electrode circulation loop 800. Among them:

[0185] The negative - electrode circulation loop 800 is used to circulate and supply the negative - electrode electrolyte B to the negative - electrode mechanism 200, so that the negative - electrode electrolyte B undergoes an energy - storage reaction with the negative - electrode assembly 210 during the circulation process.

[0186] In an alternative embodiment, please refer to Figure 1 The second plate - type structure 230 is further provided with a negative - electrode liquid inlet channel 250 communicating with the negative - electrode liquid inlet chamber 233 and a negative - electrode liquid outlet channel 260 communicating with the negative - electrode liquid outlet chamber 234; the negative - electrode circulation loop 800 is communicated with both the negative - electrode liquid inlet channel 250 and the negative - electrode liquid outlet channel 260, to supply the negative - electrode electrolyte B to the negative - electrode mechanism 200, and to recover the negative - electrode electrolyte B after the energy - storage reaction occurs between the negative - electrode electrolyte B and the negative - electrode plate 212, so as to realize the circulation of the negative - electrode electrolyte B.

[0187] In one embodiment, please refer to Figure 14 The liquid - flow energy - storage management system 500 includes a processor 510 and a signal generator 520. Among them:

[0188] The processor 510 is used to obtain at least one of the flow - rate signal and the pressure signal of the electrolyte flowing through the positive - electrode mechanism 100 and the negative - electrode mechanism 200, so as to monitor the flow rate and pressure conditions of the positive - electrode electrolyte A and the negative - electrode electrolyte B.

[0189] The signal generator 520 is electrically connected to the positive - electrode driving component 120 and the negative - electrode driving component 220. The signal generator 520 is used to generate or adjust the positive - electrode driving signal and the negative - electrode driving signal according to at least one of the flow - rate signal and the pressure signal collected in the liquid - flow circulation system, so as to realize the dynamic adjustment of the positive - electrode driving component 120 and the negative - electrode driving component 220.

[0190] In an exemplary embodiment, the flow signal is monitored by a flow sensor installed on each liquid flow circulation loop, and the pressure signal is monitored by a pressure sensor installed on each liquid flow circulation loop. Specifically, both the flow sensor and the pressure sensor are connected to the processor 510 to transmit the flow signal and the pressure signal to the processor 510. After the processor 510 acquires the flow signal and the pressure signal, it identifies them based on the magnitude, change rate, etc. of the flow signal and the pressure signal, and generates a corresponding control signal to be transmitted to the signal generator 520, so that the signal generator 520 can generate a positive driving signal and a negative driving signal according to the control signal. Subsequently, the signal generator 520 transmits the positive driving signal to each positive piezoelectric sheet and the negative driving signal to each negative piezoelectric sheet to control the positive piezoelectric sheet and the negative piezoelectric sheet to vibrate according to the amplitude and frequency corresponding to their respective driving signals, thereby providing power for the flow of the electrolyte.

[0191] In an alternative embodiment, the signal generator 520 includes an amplitude modulator 521 and a frequency modulator 522. The amplitude modulator is used to generate an amplitude control signal to adjust the amplitude of each piezoelectric sheet, and the frequency modulator 522 is used to generate a frequency modulation signal to adjust the frequency of each piezoelectric sheet, so that each piezoelectric sheet can vibrate according to the corresponding amplitude and frequency to achieve the circulation of the electrolyte.

[0192] In an alternative embodiment, the liquid flow energy storage management system 500 further includes a driving power supply 530. The driving power supply 530 is connected to both the processor 510 and the signal generator 520 to supply power to the processor 510 and the signal generator 520, ensuring that the processor 510 and the signal generator 520 can operate normally.

[0193] Please refer to Figure 15 , in an alternative embodiment, the liquid flow energy storage stack may include a plurality of liquid flow energy storage units distributed in an array. When each liquid flow energy storage unit is operating, for the positive electrode, the positive electrolyte A in the positive electrode circulation loop 700 is branched through the positive main inlet pipe into the positive inlet manifolds of each positive electrode mechanism 100, and after successively undergoing an energy storage reaction with the positive electrode plates 112 in each positive electrode mechanism 100, it is converged to the positive main outlet pipe through the positive outlet manifold, and flows forward in the positive electrode circulation loop 700, or enters the next group of positive electrode mechanisms 100, or finally returns to the storage tank, and so on in a cycle; for the negative electrode, similarly to the positive electrode, the negative electrolyte B in the negative electrode circulation loop 800 is branched through the negative main inlet pipe into the negative inlet manifolds of each negative electrode mechanism 200, and after successively undergoing an energy storage reaction with the negative electrode plates 212 in each negative electrode mechanism 200, it is converged to the negative main outlet pipe through the negative outlet manifold, and flows forward in the negative electrode circulation loop 800, or enters the next group of negative electrode mechanisms 200, or finally returns to the storage tank, and so on in a cycle.

[0194] As Figure 16 shown, in another embodiment of the present invention, a control method for a liquid flow energy storage device is provided. Taking the application of this method to a server as an example for illustration, it can be understood that this method can also be applied to a terminal, and can also be applied to a system including a terminal and a server, which is realized through the interaction between the terminal and the server. Among them, the terminal can be, but is not limited to, various personal computers, laptop computers, smart phones, tablet computers, Internet of Things devices, and portable wearable devices. The Internet of Things devices can be smart speakers, smart TVs, smart air conditioners, smart in-vehicle devices, projection devices, etc. The portable wearable devices can be smart watches, smart bracelets, head-mounted devices, etc. The head-mounted device can be a virtual reality (VR) device, an augmented reality (AR) device, smart glasses, etc. The server can be an independent physical server, a server cluster or a distributed system composed of multiple physical servers, or a cloud server providing cloud computing services. The above control method includes:

[0195] Step 1601: Generate a positive electrode driving signal and a negative electrode driving signal respectively.

[0196] Step 1602: Apply the positive electrode driving signal to the positive electrode mechanism 100.

[0197] Among them, the positive electrode mechanism 100 includes a positive electrode component 110 and a positive electrode driving component 120. The positive electrode driving signal is used to instruct the positive electrode driving component 120 to control the unidirectional flow of the positive electrode electrolyte A along a first preset direction, so that the positive electrode component 110 reacts with the positive electrode electrolyte A for energy storage;

[0198] Step 1603: Apply the negative electrode driving signal to the negative electrode mechanism 200.

[0199] Among them, the negative electrode mechanism 200 includes a negative electrode component 210 and a negative electrode driving component 220. The negative electrode driving signal is used to instruct the negative electrode driving component 220 to control the unidirectional flow of the negative electrode electrolyte B along a second preset direction, so that the negative electrode component 210 reacts with the negative electrode electrolyte B for energy storage.

[0200] Based on the same inventive concept, an embodiment of the present application also provides a control device for a liquid flow energy storage device for implementing the above-mentioned control method for a liquid flow energy storage device. The implementation solution provided by this device for solving problems is similar to the implementation solution described in the above method. Therefore, for one or more control devices for a liquid flow energy storage device provided below, the specific limitations in the embodiments can refer to the above descriptions of the control method for a liquid flow energy storage device and its limitations, and will not be repeated here.

[0201] In an exemplary embodiment, a control device for a liquid flow energy storage device is provided, including: a signal generation module, a first control module, and a second control module, where:

[0202] The signal generation module is configured to generate a positive electrode drive signal and a negative electrode drive signal respectively.

[0203] The first control module is configured to apply the positive electrode drive signal to the positive electrode mechanism 100. The positive electrode mechanism 100 includes a positive electrode assembly 110 and a positive electrode drive assembly 120. The positive electrode drive signal is used to instruct the positive electrode drive assembly 120 to control the unidirectional flow of the positive electrode electrolyte A along a first preset direction, so that the positive electrode assembly 110 reacts with the positive electrode electrolyte A for energy storage.

[0204] The second control module is configured to apply the negative electrode drive signal to the negative electrode mechanism 200. The negative electrode mechanism 200 includes a negative electrode assembly 210 and a negative electrode drive assembly 220. The negative electrode drive signal is used to instruct the negative electrode drive assembly 220 to control the unidirectional flow of the negative electrode electrolyte B along a second preset direction, so that the negative electrode assembly 210 reacts with the negative electrode electrolyte B for energy storage.

[0205] In an exemplary embodiment, a computer device is provided, including a memory and a processor. A computer program is stored in the memory, and when the processor executes the computer program, the control method of the liquid flow energy storage device in the above embodiment is implemented.

[0206] In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the control method of the liquid flow energy storage device in the above embodiment is implemented.

[0207] In the description of this specification, the description with reference to terms such as "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0208] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0209] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A piezoelectric driven liquid flow energy storage stack, characterized in that: It comprises a liquid flow energy storage unit, wherein the liquid flow energy storage unit comprises: A positive electrode mechanism, comprising a positive electrode assembly and a positive electrode driving assembly, wherein the positive electrode driving assembly is used to control the positive electrode electrolyte to flow unidirectionally along a first preset direction under the drive of a positive electrode driving signal, so that the positive electrode assembly and the positive electrode electrolyte undergo an energy storage reaction; The negative electrode mechanism includes a negative electrode assembly and a negative electrode driving assembly, wherein the negative electrode driving assembly is used to control the unidirectional flow of the negative electrode electrolyte along a second preset direction under the drive of a negative electrode driving signal, so that the negative electrode assembly and the negative electrode electrolyte undergo an energy storage reaction.

2. The liquid flow energy storage stack according to claim 1, characterized in that: The positive electrode mechanism further includes a first plate-type structure, in which a positive electrode reaction chamber is arranged; a first sealing area is arranged on a side of the first plate-type structure facing the negative electrode mechanism, an ion exchange membrane is arranged in the first sealing area, one side of the ion exchange membrane is sealed and connected to the first plate-type structure, and the positive electrode reaction chamber is formed in the first sealing area; The positive electrode assembly includes a positive current collecting plate arranged in the positive reaction chamber and a positive plate electrically connected to the positive current collecting plate. The positive plate is fixedly arranged on a side of the positive current collecting plate facing the positive reaction chamber and isolates the positive current collecting plate from the positive electrolyte. The positive plate is used to generate an energy storage reaction with the positive electrolyte when power is turned on.

3. The liquid flow energy storage stack according to claim 2, characterized in that: A positive electrode liquid inlet cavity and a positive electrode liquid outlet cavity are also provided in the first plate-type structure, and the positive electrode liquid inlet cavity, the positive electrode reaction cavity and the positive electrode liquid outlet cavity are sequentially connected along the first preset direction; The positive electrode driving component includes a positive electrode inlet hydraulic and electrical structure arranged in the positive electrode liquid inlet cavity and a positive electrode outlet hydraulic and electrical structure arranged in the positive electrode liquid outlet cavity; the positive electrode inlet hydraulic and electrical structure is used to control the positive electrode electrolyte to flow into the positive electrode reaction cavity through the positive electrode liquid inlet cavity under the drive of the positive electrode driving signal, and the positive electrode outlet hydraulic and electrical structure is used to control the positive electrode electrolyte to flow out of the positive electrode reaction cavity through the positive electrode liquid outlet cavity under the drive of the positive electrode driving signal.

4. The liquid flow energy storage stack according to claim 3, characterized in that: The positive electrode liquid inlet cavity has a first positive electrode liquid inlet and a first positive electrode liquid outlet; The positive electrode piezoelectric structure includes a first positive electrode piezoelectric sheet arranged in the positive electrode inlet cavity, a first positive electrode inlet valve floatingly arranged at the first positive electrode inlet port, and a first positive electrode outlet valve floatingly arranged at the first positive electrode outlet port; the first positive electrode piezoelectric sheet is used to deform convexly away from the positive electrode inlet cavity under the control of the positive electrode drive signal so that the positive electrode electrolyte enters the positive electrode inlet cavity unidirectionally through the first positive electrode inlet port, or deform concavely close to the positive electrode inlet cavity so that the positive electrode electrolyte flows out of the positive electrode inlet cavity unidirectionally through the first positive electrode outlet port.

5. The liquid flow energy storage stack according to claim 3, characterized in that: The positive electrode liquid outlet cavity has a second positive electrode liquid inlet and a second positive electrode liquid outlet; The positive electrode piezoelectric structure includes a second positive electrode piezoelectric sheet arranged in the positive electrode liquid outlet cavity, a second positive electrode liquid inlet valve floatingly arranged at the second positive electrode liquid inlet, and a second positive electrode liquid outlet valve floatingly arranged at the second positive electrode liquid outlet; the second positive electrode piezoelectric sheet is used to deform convexly away from the positive electrode liquid outlet cavity under the control of the positive electrode drive signal so that the positive electrode electrolyte enters the positive electrode liquid outlet cavity unidirectionally through the second positive electrode liquid inlet, or deform concavely close to the positive electrode liquid outlet cavity so that the positive electrode electrolyte flows out of the positive electrode liquid outlet cavity unidirectionally through the second positive electrode liquid outlet.

6. The liquid flow energy storage stack according to claim 2, characterized in that: The negative electrode mechanism further includes a second plate structure, in which a negative electrode reaction chamber is arranged; a second sealing area is arranged on one side of the second plate structure facing the positive electrode mechanism, and the other side of the ion exchange membrane is sealed and connected to the second plate structure, so that the negative electrode reaction chamber is formed in the second sealing area; The negative electrode assembly includes a negative current collecting plate arranged in the negative electrode reaction chamber and a negative electrode plate electrically connected to the negative current collecting plate. The negative electrode plate is fixedly arranged on a side of the negative current collecting plate facing the negative electrode reaction chamber and isolates the negative current collecting plate from the negative electrode electrolyte. The negative electrode plate is used to generate an energy storage reaction with the negative electrode electrolyte when power is turned on.

7. The liquid flow energy storage stack according to claim 6, characterized in that: A negative electrode liquid inlet cavity and a negative electrode liquid outlet cavity are also provided in the second plate-type structure, and the negative electrode liquid inlet cavity, the negative electrode reaction cavity and the negative electrode liquid outlet cavity are sequentially connected along the second preset direction; The negative electrode driving component includes a negative electrode inlet hydraulic and electrical structure arranged in the negative electrode liquid inlet chamber and a negative electrode outlet hydraulic and electrical structure arranged in the negative electrode liquid outlet chamber; the negative electrode inlet hydraulic and electrical structure is used to control the negative electrode electrolyte to flow into the negative electrode reaction chamber through the negative electrode liquid inlet chamber under the drive of the negative electrode driving signal, and the negative electrode outlet hydraulic and electrical structure is used to control the negative electrode electrolyte to flow out of the negative electrode reaction chamber through the negative electrode liquid outlet chamber under the drive of the negative electrode driving signal.

8. The liquid flow energy storage stack according to claim 7, characterized in that: The negative electrode liquid inlet cavity has a first negative electrode liquid inlet and a first negative electrode liquid outlet; The negative electrode piezoelectric structure includes a first negative electrode piezoelectric sheet arranged in the negative electrode liquid inlet cavity, a first negative electrode liquid inlet valve floatingly arranged at the first negative electrode liquid inlet port, and a first negative electrode liquid outlet valve floatingly arranged at the first negative electrode liquid outlet port; the first negative electrode piezoelectric sheet is used to deform convexly away from the negative electrode liquid inlet cavity under the control of the negative electrode drive signal so that the negative electrode electrolyte enters the negative electrode liquid inlet cavity unidirectionally through the first negative electrode liquid inlet port, or deform concavely close to the negative electrode liquid inlet cavity so that the negative electrode electrolyte flows out of the negative electrode liquid inlet cavity unidirectionally through the first negative electrode liquid outlet port.

9. The liquid flow energy storage stack according to claim 7, characterized in that: The negative electrode liquid outlet cavity has a second negative electrode liquid inlet and a second negative electrode liquid outlet; The negative electrode piezoelectric structure includes a second negative electrode piezoelectric sheet arranged in the negative electrode liquid outlet cavity, a second negative electrode liquid inlet valve floatingly arranged at the second negative electrode liquid inlet, and a second negative electrode liquid outlet valve floatingly arranged at the second negative electrode liquid outlet; the second negative electrode piezoelectric sheet is used to deform convexly away from the negative electrode liquid outlet cavity under the control of the negative electrode drive signal so that the negative electrode electrolyte enters the negative electrode liquid outlet cavity unidirectionally through the second negative electrode liquid inlet, or deform concavely close to the negative electrode liquid outlet cavity so that the negative electrode electrolyte flows out of the negative electrode liquid outlet cavity unidirectionally through the second negative electrode liquid outlet.

10. The liquid flow energy storage stack according to claim 6, characterized in that: The liquid flow energy storage stack includes a plurality of liquid flow energy storage units connected in parallel in the longitudinal direction. The positive electrode electrolyte flows into the corresponding positive electrode mechanism through the positive electrode liquid inlet manifold connected to each of the positive electrode mechanisms, and after respectively undergoing energy storage reaction with the positive electrode plate in each of the positive electrode reaction chambers, flows out of the positive electrode mechanism through the positive electrode liquid outlet manifold connected to each of the positive electrode mechanisms; the negative electrode electrolyte flows into the corresponding negative electrode mechanism through the negative electrode liquid inlet manifold connected to each of the negative electrode mechanisms, and after respectively undergoing energy storage reaction with the negative electrode plate in each of the negative electrode reaction chambers, flows out of the negative electrode mechanism through the negative electrode liquid outlet manifold connected to each of the negative electrode mechanisms.

11. The liquid flow energy storage stack according to claim 6, characterized in that: The liquid flow energy storage stack includes a plurality of liquid flow energy storage units connected in parallel in the vertical direction, wherein the positive electrode reaction chambers are sequentially connected in the vertical direction to form a positive electrode common reaction chamber, and the negative electrode reaction chambers are sequentially connected in the vertical direction to form a negative electrode common reaction chamber; The positive electrode electrolyte flows into the corresponding positive electrode mechanism through the positive electrode liquid inlet manifold connected to each of the positive electrode mechanisms, and after an energy storage reaction occurs with the positive electrode assembly in the positive electrode common reaction chamber, the positive electrode electrolyte flows out of the positive electrode mechanism through the positive electrode liquid outlet manifold connected to each of the positive electrode mechanisms; the negative electrode electrolyte flows into the corresponding negative electrode mechanism through the negative electrode liquid inlet manifold connected to each of the negative electrode mechanisms, and after an energy storage reaction occurs with the negative electrode assembly in the negative electrode common reaction chamber, the negative electrode electrolyte flows out of the negative electrode mechanism through the negative electrode liquid outlet manifold connected to each of the negative electrode mechanisms.

12. The liquid flow energy storage stack according to any one of claims 1 to 11, characterized in that: The liquid flow energy storage stack includes a plurality of the liquid flow energy storage units distributed in an array, and the connection method of the plurality of the liquid flow energy storage units includes at least one of being connected in series in the horizontal direction, being connected in parallel in the vertical direction, and being connected in parallel in the longitudinal direction, and the horizontal, vertical and longitudinal directions are orthogonal to each other.

13. The liquid flow energy storage stack according to any one of claims 1 to 11, characterized in that: The positive electrode mechanism comprises a positive electrode reaction chamber and a plurality of positive electrode liquid inlet chambers connected to the positive electrode reaction chamber and a plurality of positive electrode liquid outlet chambers connected to the positive electrode reaction chamber; the positive electrode assembly is arranged in the positive electrode reaction chamber, and the positive electrode driving assembly comprises a positive electrode liquid inlet hydraulic and electrical structure correspondingly arranged in each of the positive electrode liquid inlet chambers and a positive electrode liquid outlet hydraulic and electrical structure correspondingly arranged in each of the positive electrode liquid outlet chambers; The negative electrode mechanism has a negative electrode reaction chamber and a plurality of negative electrode liquid inlet chambers connected to the negative electrode reaction chamber and a plurality of negative electrode liquid outlet chambers connected to the negative electrode reaction chamber; the negative electrode assembly is arranged in the negative electrode reaction chamber, and the negative electrode driving assembly includes a negative electrode liquid inlet hydraulic and electrical structure correspondingly arranged in each of the negative electrode liquid inlet chambers and a negative electrode liquid outlet hydraulic and electrical structure correspondingly arranged in each of the negative electrode liquid outlet chambers.

14. The liquid flow energy storage stack according to claim 13, characterized in that: The liquid flow energy storage stack includes a plurality of the liquid flow energy storage units distributed in an array, and the connection mode of the plurality of the liquid flow energy storage units includes at least one of being connected in series in the horizontal direction, being connected in parallel in the vertical direction, and being connected in parallel in the longitudinal direction, and the horizontal direction, the vertical direction, and the longitudinal direction are orthogonal to each other; wherein, in two adjacent positive electrode mechanisms connected in series, the positive electrode liquid outlet cavity of the positive electrode mechanism located at the head end is connected with the positive electrode liquid inlet cavity of the positive electrode mechanism located at the tail end, and in two adjacent negative electrode mechanisms connected in series, the negative electrode liquid outlet cavity of the negative electrode mechanism located at the head end is connected with the negative electrode liquid inlet cavity of the negative electrode mechanism located at the tail end, and in two adjacent positive electrode mechanisms connected in parallel, each positive electrode liquid inlet cavity is connected in sequence, and each positive electrode liquid outlet cavity is connected in sequence, and in two adjacent negative electrode mechanisms connected in parallel, each negative electrode liquid inlet cavity is connected in sequence, and each negative electrode liquid outlet cavity is connected in sequence.

15. A liquid flow energy storage device, characterized in that: Comprising a liquid flow energy storage stack and a liquid flow energy storage management system as claimed in any one of claims 1 to 14; wherein: The liquid flow energy storage management system is connected to both the positive electrode drive component and the negative electrode drive component, and is used to generate the positive electrode drive signal and the negative electrode drive signal to drive the positive electrode drive component and the negative electrode drive component to control the corresponding electrolyte to flow along a preset direction.

16. The liquid flow energy storage device according to claim 15, characterized in that: The liquid flow energy storage management system comprises: A processor, configured to obtain at least one of a flow rate signal and a pressure signal of an electrolyte flowing through the positive electrode mechanism and the negative electrode mechanism; A signal generator is electrically connected to the positive driving component and the negative driving component, and the signal generator is used to generate or adjust the positive driving signal and the negative driving signal according to at least one of the flow signal and the pressure signal.

17. The liquid flow energy storage device according to claim 15, characterized in that: Also includes: A positive electrode circulation loop, used for cyclically supplying positive electrode electrolyte to the positive electrode mechanism, so that the positive electrode electrolyte undergoes energy storage reaction with the positive electrode assembly during the circulation process; The negative electrode circulation loop is used to circulate the negative electrode electrolyte to the negative electrode mechanism so that the negative electrode electrolyte undergoes an energy storage reaction with the negative electrode assembly during the circulation process.

18. The liquid flow energy storage device according to any one of claims 15 to 17, characterized in that: Also includes: A power supply system is connected to both the positive electrode assembly and the negative electrode assembly, and the power supply system is used to control the positive electrode assembly and the negative electrode assembly to generate energy storage reactions with corresponding electrolytes to charge and discharge the liquid flow energy storage stack.

19. A control method for a liquid flow energy storage device, characterized in that: The liquid flow energy storage device comprises a liquid flow energy storage unit, the liquid flow energy storage unit comprises a positive electrode mechanism and a negative electrode mechanism, the positive electrode mechanism comprises a positive electrode assembly and a positive electrode driving assembly, and the method comprises: respectively generating a positive driving signal and a negative driving signal; Applying the positive electrode drive signal to the positive electrode mechanism; the positive electrode mechanism includes a positive electrode assembly and a positive electrode drive assembly, and the positive electrode drive signal is used to instruct the positive electrode drive assembly to control the positive electrode electrolyte to flow unidirectionally along a first preset direction, so that the positive electrode assembly and the positive electrode electrolyte undergo an energy storage reaction; The negative electrode drive signal is applied to the negative electrode mechanism; the negative electrode mechanism includes a negative electrode assembly and a negative electrode drive assembly, and the negative electrode drive signal is used to instruct the negative electrode drive assembly to control the negative electrode electrolyte to flow unidirectionally along a second preset direction so that the negative electrode assembly and the negative electrode electrolyte undergo an energy storage reaction.

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