High-efficiency electric power energy storage system based on flow battery

Abstract

The invention discloses a high-efficiency electric energy storage system based on a flow battery, which comprises a galvanic pile unit, a fastening unit is arranged on the galvanic pile unit, and an electrolyte storage unit is arranged below the galvanic pile unit; preliminary connection operation of the positive electrode end plate and the negative electrode end plate is achieved through the plug-in assemblies, the multiple plug-in assemblies are synchronously locked through cooperative use of the supporting plates, the telescopic assemblies and the clamping assemblies so as to achieve assembling and fixing operation of the galvanic pile unit, the traditional mode that multiple nuts and bolts are connected and fixed is changed, and the practicability is high. The electric pile unit can be quickly mounted and dismounted, so that the electric pile unit can be conveniently maintained and overhauled; the pressing assembly can be matched with the clamping assembly for use, so that the positive end plate and the negative end plate can be close to each other, and the stability and the sealing performance between the positive end plate and the electric pile and between the negative end plate and the electric pile are ensured; the clamping assembly can be locked or unlocked through the positioning assembly, so that it is guaranteed that the clamping assembly can be stably kept in the needed state.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid flow batteries, and in particular to a high-efficiency electric energy storage system based on liquid flow batteries. Background Art

[0002] Liquid flow battery is an electrochemical energy storage technology and a new type of battery. Liquid flow battery consists of a battery stack unit, electrolyte, electrolyte storage and supply unit, and management control unit. It is a high-performance battery that separates the positive and negative electrolytes and circulates them separately. It has the characteristics of high capacity, wide application field (environment), and long cycle life. It is a new energy product.

[0003] The existing patent document with the announcement number CN211829056U discloses a liquid flow battery stack, which is provided with one or more basic battery units, wherein the front faces of the positive electrode plate frame and the negative electrode plate frame face each other, and a diaphragm is placed between the positive electrode plate frame and the negative electrode plate frame, and the diaphragm is fixedly sealed with the positive electrode plate frame and the negative electrode plate frame respectively, and the positive electrode is placed in the electrode cavity in the positive electrode plate frame, and the negative electrode is placed in the electrode cavity in the negative electrode plate frame to complete the assembly of the basic battery unit; a positive bipolar plate is provided in front of the basic battery unit, The adjacent battery cells or the positive electrode side collector are connected through the positive electrode side bipolar plate; the negative electrode side bipolar plate is provided behind the basic battery cell, and the adjacent battery cells or the negative electrode side collector are connected through the negative electrode side bipolar plate; the structure is simple and easy to assemble, which improves the installation success rate of the liquid flow battery stack and reduces the cost; it can achieve uniform diversion of the electrolyte, which can effectively improve the consistency of each unit in the battery stack, thereby improving the battery efficiency and performance; it is suitable for all liquid flow battery systems, especially for zinc-based liquid flow battery systems such as zinc-iron, zinc-bromine, zinc-cerium, zinc-iodine, and zinc-manganese.

[0004] Although the above-mentioned liquid flow battery stack can solve the corresponding technical problems, it uses bolts to pass through the through holes, and the front exposed part of the bolt is fixed and tightened with the positive electrode side nut, and the rear exposed part of the bolt is fixed and tightened with the negative electrode side nut to realize the assembly operation of the liquid flow battery stack. However, the installation and fixation are carried out by bolts and nuts, and each bolt and nut needs to be operated separately during disassembly and assembly, which is cumbersome, thereby affecting the maintenance efficiency of the liquid flow battery stack. For this reason, a high-efficiency power storage system based on a liquid flow battery is proposed. Summary of the invention

[0005] The technical task of the present invention is to provide a high-efficiency power storage system based on liquid flow batteries to solve the above problems.

[0006] To achieve the above object, the present invention provides the following technical solutions: A high-efficiency electric energy storage system based on a flow battery comprises a battery stack unit, a fastening unit is arranged on the battery stack unit, an electrolyte storage unit is arranged below the battery stack unit, and a support unit is arranged between the battery stack unit and the electrolyte storage unit; The battery stack unit cooperates with the electrolyte storage unit to realize the mutual conversion and energy storage of electrical energy and chemical energy through the change of the valence state of the reactive substances; The fastening unit is used to realize the assembly and fixation of the battery stack unit; The support unit is used to provide a support base for the battery stack unit.

[0007] Preferably, the battery stack unit includes a battery stack, a positive terminal plate is provided on one side of the battery stack, a negative terminal plate is provided on the other side of the battery stack, a positive liquid inlet pipe and a positive liquid outlet pipe are penetrated on the positive terminal plate, one end of the positive liquid inlet pipe and the positive liquid outlet pipe are connected with the battery stack, a negative liquid inlet pipe and a negative liquid outlet pipe are penetrated on the negative terminal plate, one end of the negative liquid inlet pipe and the negative liquid outlet pipe are connected with the battery stack, two groups of plug-in components are arranged up and down between the positive terminal plate and the negative terminal plate, each group of the plug-in components has a plurality of components distributed horizontally and equidistantly, and the plug-in components are used to realize the preliminary connection between the positive terminal plate and the negative terminal plate; The plug assembly includes a plug rod, and the positive terminal plate and the negative terminal plate are both provided with a plug hole for the plug rod to pass through, the inner wall surface of the plug hole is slidably connected to the outer surface of the corresponding plug rod, and the end of the plug rod close to the positive terminal plate is fixedly connected with a stopper, and the diameter of the stopper is larger than the diameter of the plug hole; The fastening unit comprises a support plate located on one side of the negative terminal plate, two symmetrically arranged telescopic components are arranged between the support plate and the negative terminal plate, a clamping component is arranged on the side of the support plate close to the negative terminal plate, a pressing component is arranged on each of the plug rods, and a positioning component is arranged on the side of the support plate away from the negative terminal plate; The telescopic assembly includes a side plate fixedly connected to the support plate near the negative terminal plate, the top and bottom of the side plate are provided with a slide groove, the inner cavity of the slide groove is slidably connected with a slider, and the slider is connected to the negative terminal plate; The locking plate is provided with a plurality of locking plates, each of which has a plurality of locking plates respectively secured to the locking plate and pivotally connected to the locking plate. The clamping assembly includes a spring and a pressure ring movably mounted on the surface of the insertion rod, the spring is located between the negative end plate and the pressure ring, the side of the pressure ring away from the spring is in contact with the corresponding wedge block, and the inner wall surface of the pressure ring is slidably connected to the surface of the insertion rod.

[0008] Preferably, the support plate is provided with regularly distributed through holes, and the ends of the negative electrode liquid inlet pipe and the negative electrode liquid outlet pipe away from the negative terminal plate pass through the corresponding through holes to one side of the support plate.

[0009] Preferably, a through slot is provided on the push plate, and the end of the connecting rod away from the turntable passes through the inner cavity of the through slot and is rotatably connected.

[0010] Preferably, the limiting assembly comprises a T-shaped slot formed on the push plate, the inner cavity of the T-shaped slot is slidably connected to a guide rail, and one side of the guide rail is fixedly connected to the support plate.

[0011] Preferably, both ends of the spring are fixedly connected with gaskets, one of the gaskets is in contact with the negative terminal plate, and the other gasket is in contact with the corresponding pressure ring.

[0012] Preferably, the rotating assembly includes a rotating assembly fixedly connected to the center of one side of the turntable, one end of the rotating assembly movably penetrates one side of the support plate and is fixedly connected to a gear, and the side of the gear away from the support plate is fixedly connected to a knob.

[0013] Preferably, the positioning assembly includes a hollow block fixedly connected to the support plate, the inner cavity thread of the hollow block is penetrated by a bolt, one end of the bolt is rotated toward the gear and connected to a tooth block meshing with the knob, and one side of the tooth block is slidably connected to the support plate.

[0014] Preferably, the electrolyte storage unit comprises two storage tanks, one of which is used to store positive electrode electrolyte, and the other is used to store negative electrode electrolyte, a circulation supply assembly is provided between one of the storage tanks and the positive terminal plate, and between the other storage tank and the negative terminal plate, respectively, a frame is provided on the surface of the storage tank, and a support is fixedly connected to the bottom of the frame; Wherein, the circulating supply assembly includes a pump body located above the storage tank, a connecting pipe is connected between the liquid inlet end of the pump body and the storage tank, and a conduit is connected to the liquid outlet end of the pump body, wherein one end of one conduit away from the pump body is connected to the positive electrode liquid inlet pipe, and the other end of the conduit away from the pump body is connected to the negative electrode liquid inlet pipe, one end of the positive electrode liquid outlet pipe and the negative electrode liquid outlet pipe are respectively connected to a circulating pipe, and the bottom end of the circulating pipe is connected to the corresponding storage tank, and valves are installed on the connecting pipe and the circulating pipe.

[0015] Preferably, the support unit includes a support plate located at the center above the two frames, a group of legs are fixedly connected to both sides of the bottom of the support plate, each group of legs is arranged in a one-to-one correspondence with each frame, and each group of legs is arranged with two legs in the front and back, and the bottom ends of the legs are fixedly connected to the tops of the corresponding frames, the positive end plate, the negative end plate and the bottoms of the support plate are all in contact with the top of the support plate, and the pump body is installed at the bottom of the support plate.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are: 1. The present invention realizes the preliminary connection operation of the positive terminal plate and the negative terminal plate through the plug-in assembly, and synchronously locks multiple plug-in assemblies through the coordinated use of the support plate, the telescopic assembly and the clamping assembly to realize the assembly and fixing operation of the battery stack unit, which changes the traditional connection and fixing method of multiple nuts and bolts, has the advantages of saving time and labor, is conducive to the rapid installation and disassembly of the battery stack unit, and thus facilitates the maintenance and repair of the battery stack unit; 2. The present invention can be used in conjunction with the clamping assembly through the compression assembly, so that the positive terminal plate and the negative terminal plate can be brought close to each other, ensuring the stability and sealing between the positive terminal plate and the battery stack, and between the negative terminal plate and the battery stack; 3. The present invention can lock or unlock the snap-in assembly through the positioning assembly to ensure that the snap-in assembly can be stably maintained in a desired state, thereby helping to ensure the firmness of the battery stack unit after assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of a high-efficiency electric energy storage system based on a flow battery according to an embodiment of the present invention; Figure 2 The local structure of the high-efficiency power storage system based on flow battery according to the embodiment of the present invention is shown in FIG. Figure 1 ; Figure 3 The local structure of the high-efficiency power storage system based on flow battery according to the embodiment of the present invention is shown in FIG. Figure 2 ; Figure 4 It is a structural schematic diagram of a battery stack unit and a fastening unit of a high-efficiency electric energy storage system based on a liquid flow battery according to an embodiment of the present invention; Figure 5It is a schematic diagram of the structure explosion of the battery stack unit and the fastening unit of the high-efficiency electric energy storage system based on the liquid flow battery according to the embodiment of the present invention; Figure 6 It is a schematic diagram of the structure explosion of the battery stack unit and the clamping assembly of the high-efficiency electric energy storage system based on the liquid flow battery according to the embodiment of the present invention; Figure 7 It is a schematic diagram of the structure explosion of the plug-in assembly and the wedge-shaped block of the high-efficiency electric energy storage system based on the liquid flow battery according to the embodiment of the present invention; Figure 8 It is a partial structural schematic diagram of a clamping assembly of a high-efficiency electric energy storage system based on a flow battery according to an embodiment of the present invention; Fig. 9 It is a schematic diagram of the structure explosion of the battery stack unit and the pressing assembly of the high-efficiency electric energy storage system based on the liquid flow battery according to the embodiment of the present invention; Fig.10 It is a partial structural exploded schematic diagram of a plug-in assembly and a pressing assembly of a high-efficiency electric energy storage system based on a flow battery according to an embodiment of the present invention; Fig.11 A high-efficiency electric energy storage system based on a flow battery according to an embodiment of the present invention Figure 4 Schematic diagram of the enlarged structure of point A.

[0019] In the figure: 100, battery stack unit; 110, battery stack; 120, positive terminal plate; 121, positive electrode liquid inlet pipe; 122, positive electrode liquid outlet pipe; 130, negative terminal plate; 131, negative electrode liquid inlet pipe; 132, negative electrode liquid outlet pipe; 140, plug assembly; 141, plug rod; 1411, stopper; 1412, wedge groove; 142, plug hole; 200, fastening unit; 210, support plate; 220, telescopic assembly; 221, side plate; 222, slide groove; 223, slider; 230, clamping assembly; 231, turntable; 232, connecting rod; 233, push plate; 2331, through groove; 234, wedge block; 235, limit assembly; 2351, T-slot; 2352, guide rail; 236, rotating assembly; 2361, boss; 2362, gear; 2363, knob; 240, clamping assembly; 241, spring; 2411, gasket; 242, pressure ring; 250, positioning assembly; 251, hollow block; 252, bolt; 253, tooth block; 300, electrolyte storage unit; 310, storage tank; 320, circulation supply assembly; 321, pump body; 322, connecting pipe; 323, conduit; 324, circulation pipe; 330, frame; 340, support; 400, support unit; 410, support plate; 420, support leg. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] Example 1 like Figure 1-Figure 11 As shown, a high-efficiency electric energy storage system based on a flow battery according to an embodiment of the present invention includes a battery stack unit 100, a fastening unit 200, an electrolyte storage unit 300 and a support unit 400. The fastening unit 200 is arranged on the battery stack unit 100, the electrolyte storage unit 300 is arranged below the battery stack unit 100, and the support unit 400 is arranged between the battery stack unit 100 and the electrolyte storage unit 300; the battery stack unit 100 and the electrolyte storage unit 300 cooperate to realize the mutual conversion and energy storage of electrical energy and chemical energy through the valence change of the reactive substances, the fastening unit 200 is used to realize the assembly and fixation of the battery stack unit 100, and the support unit 400 is used to provide a supporting basis for the battery stack unit 100.

[0023] Example 2 like Figure 1-Figure 11 As shown, this embodiment provides a high-efficiency electric energy storage system based on a flow battery, which is different from the embodiment 1 in that: The battery stack unit 100 includes a battery stack 110, a positive terminal plate 120 is provided on one side of the battery stack 110, and a negative terminal plate 130 is provided on the other side of the battery stack 110. A positive electrode liquid inlet pipe 121 and a positive electrode liquid outlet pipe 122 are provided through the positive terminal plate 120, and one end of the positive electrode liquid inlet pipe 121 and the positive electrode liquid outlet pipe 122 are connected to the battery stack 110, and a negative electrode liquid inlet pipe 131 and a negative electrode liquid outlet pipe 132 are provided through the negative terminal plate 130, and the negative electrode liquid inlet pipe 131 is connected to the positive electrode liquid outlet pipe 132. One end of the negative electrode liquid outlet pipe 132 is connected to the battery stack 110, and the positive electrode liquid inlet pipe 121 and the positive electrode liquid outlet pipe 122, and the negative electrode liquid inlet pipe 131 and the negative electrode liquid outlet pipe 132 are respectively arranged diagonally. Two groups of plug-in components 140 are arranged up and down between the positive terminal plate 120 and the negative terminal plate 130, and each group of plug-in components 140 is horizontally equidistantly distributed with multiple plug-in components 140. The plug-in components 140 are used to achieve the initial connection between the positive terminal plate 120 and the negative terminal plate 130.

[0024] The plug-in assembly 140 includes an insertion rod 141. A hole 142 for the insertion rod 141 to pass through is provided on the positive terminal plate 120 and the negative terminal plate 130. The inner wall surface of the hole 142 is slidably connected to the outer surface of the corresponding insertion rod 141. A stopper 1411 is fixedly connected to the end of the insertion rod 141 close to the positive terminal plate 120. The diameter of the stopper 1411 is larger than the diameter of the hole 142. When the stopper 1411 passes through the holes 142 on the positive terminal plate 120 and the negative terminal plate 130 in turn, the stopper 1411 can limit the insertion rod 141, effectively preventing the insertion rod 141 from moving excessively and slipping out of the inner cavity of the hole 142.

[0025] The fastening unit 200 includes a support plate 210 located at one side of the negative terminal plate 130, two symmetrically arranged telescopic components 220 are arranged between the support plate 210 and the negative terminal plate 130, a clamping component 230 is arranged on the side of the support plate 210 close to the negative terminal plate 130, a pressing component 240 is arranged on each plug rod 141, and a positioning component 250 is arranged on the side of the support plate 210 away from the negative terminal plate 130; regularly distributed through holes are opened on the support plate 210, and the ends of the negative electrode liquid inlet pipe 131 and the negative electrode liquid outlet pipe 132 away from the negative terminal plate 130 pass through the corresponding through holes to one side of the support plate 210, and the through holes can prevent the support plate 210 from blocking the negative electrode liquid inlet pipe 131 and the negative electrode liquid outlet pipe 132, so as to facilitate the subsequent connection operation between the negative electrode liquid inlet pipe 131 and the electrolyte storage unit 300, and the negative electrode liquid outlet pipe 132 and the electrolyte storage unit 300.

[0026] The telescopic component 220 includes a side plate 221 fixedly connected to the support plate 210 near the negative end plate 130, and a slide groove 222 is provided on the top and bottom of the side plate 221. The inner cavity of the slide groove 222 is slidably connected with a slider 223, and the slider 223 is detachably connected to the negative end plate 130 by screws. The telescopic component 220 can not only realize the connection between the support plate 210 and the negative end plate 130 to ensure the normal operation of the fastening unit 200, but also guide the support plate 210 so that the support plate 210 can move stably horizontally. At the same time, it can be used in conjunction with the clamping component 240 to achieve fine-tuning of the clamping force of the positive end plate 120 and the negative end plate 130.

[0027] The clamping assembly 230 includes a rotating disk 231 movably arranged on the side of the support plate 210 facing the negative end plate 130. The side of the rotating disk 231 away from the support plate 210 is rotatably connected to two oppositely arranged connecting rods 232 through a rotating shaft. Each connecting rod 232 is movably provided with a push plate 233 at one end away from the rotating disk 231. A group of wedge blocks 234 are fixedly connected to the opposite sides of the two push plates 233. Each group of wedge blocks 234 is horizontally equidistantly distributed. The wedge blocks 234 are arranged one by one with the insertion rod 141. The end of the insertion rod 141 away from the stop block 1411 is provided with a wedge groove 1412 adapted to the wedge block 234. The wedge block 234 is clamped to the corresponding The inner cavity of the wedge-shaped groove 1412, two symmetrically arranged limit assemblies 235 are provided between the push plate 233 and the support plate 210, and a rotating assembly 236 used in conjunction with the positioning assembly 250 is provided on the turntable 231. By rotating the turntable 231, one end of the connecting rod 232 can be driven to move synchronously. Since the length of the connecting rod 232 remains unchanged, the other end of the connecting rod 232 drives the push plate 233 to move toward or away from the insertion rod 141, and the push plate 233 drives the wedge block 234 to move synchronously, thereby realizing the locking or unlocking operation of the insertion rod 141; a through groove 2331 is opened on the push plate 233, and the end of the connecting rod 232 away from the turntable 231 passes through the through groove The inner cavity of the groove 2331 is connected by rotating the shaft, which can not only realize the active connection between the connecting rod 232 and the push plate 233, but also provide a movable space for the end of the connecting rod 232 to ensure that when the connecting rod 232 operates synchronously with the rotating disk 231, the push plate 233 will not block the connecting rod 232; the limiting component 235 includes a T-shaped groove 2351 opened on the push plate 233, and the inner cavity of the T-shaped groove 2351 is slidably connected with a guide rail 2352, and one side of the guide rail 2352 is fixedly connected to the support plate 210. When the connecting rod 232 drives the push plate 233 to move, the push plate 233 can drive the T-shaped groove 2351 to slide on the surface of the guide rail 2352, thereby being able to push the push plate 210. The plate 233 plays a guiding role, so that the push plate 233 can move stably toward or away from the insertion rod 141; the rotating assembly 236 includes a rotating assembly 236 fixedly connected to the center of one side of the turntable 231, one end of the rotating assembly 236 movably penetrates to one side of the support plate 210 and is fixedly connected to a gear 2362, and the surface of the boss 2361 is rotatably connected to the penetration of the support plate 210 through a bearing to achieve a movable connection between the rotating assembly 236 and the support plate 210, which helps to improve the stability of the boss 2361 during rotation, and the gear 2362 is fixedly connected to a knob 2363 on the side away from the support plate 210, which is convenient for the hand to rotate the gear 2362 under force.

[0028] The clamping assembly 240 includes a spring 241 and a pressure ring 242 movably mounted on the surface of the plug rod 141. The spring 241 is located between the negative terminal plate 130 and the pressure ring 242. The side of the pressure ring 242 away from the spring 241 contacts the corresponding wedge block 234. The inner wall surface of the pressure ring 242 is slidably connected to the surface of the plug rod 141. When the wedge block 234 is inserted into the inner cavity of the corresponding wedge groove 1412, it can limit the plug rod 141 again, so that the plug rod 141 will not be separated from the inner cavity of the jack 142. When the wedge block 234 continues to be inserted into the inner cavity of the wedge groove 1412, the pressure ring 242 can be forced toward the negative terminal plate 130. The inner cavity moves and causes the spring 241 to be compressed. Under the elastic force of the spring 241, the positive terminal plate 120 and the negative terminal plate 130 are firmly pressed against the battery stack 110, which helps to improve the stability and sealing of the assembly and fixation of the battery stack unit 100; both ends of the spring 241 are fixedly connected with gaskets 2411, one of the gaskets 2411 is in contact with the negative terminal plate 130, and the other gasket 2411 is in contact with the corresponding pressure ring 242. The gasket 2411 can prevent the spring 241 from directly contacting the negative terminal plate 130 and the pressure ring 242, thereby preventing the surface of the negative terminal plate 130 and the pressure ring 242 from being scratched.

[0029] The positioning assembly 250 includes a hollow block 251 fixedly connected to the support plate 210, and the inner cavity thread of the hollow block 251 is penetrated by a bolt 252. The end of the bolt 252 facing the gear 2362 is rotatably connected to a tooth block 253 meshing with the knob 2363 through a bearing. One side of the tooth block 253 is slidably connected to the support plate 210. By rotating the bolt 252, the tooth block 253 can be driven to move toward or away from the gear 2362 under the action of the thread to achieve the locking or unlocking operation of the gear 2362. In the locked state, the connection stability between the snap-in assembly 230 and the plug-in assembly 140 can be guaranteed. In the unlocked state, the subsequent disassembly of the snap-in assembly 230 and the plug-in assembly 140 can be facilitated.

[0030] The electrolyte storage unit 300 includes two storage tanks 310, one of which is used to store positive electrode electrolyte and the other is used to store negative electrode electrolyte. A circulation supply assembly 320 is provided between one of the storage tanks 310 and the positive terminal plate 120 and between the other of the storage tanks 310 and the negative terminal plate 130, respectively. A frame 330 is provided on the surface of the storage tank 310, and a support 340 is fixedly connected to the bottom of the frame 330.

[0031] The circulating supply assembly 320 includes a pump body 321 located above the storage tank 310, a connecting pipe 322 is connected between the liquid inlet end of the pump body 321 and the storage tank 310, and a conduit 323 is connected to the liquid outlet end of the pump body 321, one end of one conduit 323 away from the pump body 321 is connected to the positive electrode liquid inlet pipe 121 through a flange, and the other end of the conduit 323 away from the pump body 321 is connected to the negative electrode liquid inlet pipe 131 through a flange, and one end of the positive electrode liquid outlet pipe 122 and the negative electrode liquid outlet pipe 132 are respectively connected to the circulating pipe 324 through flanges, and the bottom of the circulating pipe 324 is connected to the positive electrode liquid outlet pipe 122 and the negative electrode liquid outlet pipe 132. The end is connected to the corresponding storage tank 310, and valves are installed on the connecting pipe 322 and the circulation pipe 324. By starting the pump body 321, the electrolyte in the storage tank 310 can be transported to the battery stack 110 for reaction and circulation, and the mutual conversion of electrical energy and chemical energy is realized through the reversible redox reaction of the active substances in the positive and negative electrolyte solutions. During charging, an oxidation reaction occurs at the positive electrode to increase the valence state of the active substance, and a reduction reaction occurs at the negative electrode to reduce the valence state of the active substance; the discharge process is the opposite, and it has the characteristics of high capacity, wide application range, and long cycle life.

[0032] The support unit 400 includes a support plate 410 located at the center above the two frames 330, and a group of legs 420 are fixedly connected to both sides of the bottom of the support plate 410. Each group of legs 420 is arranged in a one-to-one correspondence with each frame 330, and each group of legs 420 is arranged with two in the front and back. The bottom ends of the legs 420 are fixedly connected to the tops of the corresponding frames 330, and the bottoms of the positive terminal plate 120, the negative terminal plate 130 and the support plate 210 are all in contact with the top of the support plate 410. The pump body 321 is installed at the bottom of the support plate 410. The support unit 400 can provide a supporting foundation for the stack unit 100, the fastening unit 200 and the pump body 321.

[0033] Working principle: Charging and discharging operation: When charging, open the valve and start the pump body 321. The positive electrode electrolyte in one storage tank 310 is transported to the battery stack 110 through the corresponding connecting pipe 322, the pump body 321, the conduit 323 and the positive electrode liquid inlet pipe 121 for reaction. The negative electrode electrolyte in the other storage tank 310 is transported to the battery stack 110 through the corresponding connecting pipe 322, the pump body 321, the conduit 323 and the negative electrode liquid inlet pipe 131 for reaction. The positive electrode undergoes an oxidation reaction to increase the valence of the active substance, and the negative electrode undergoes a reduction reaction to reduce the valence of the active substance. After the reaction is completed, the positive electrode electrolyte is transported to the corresponding storage tank 310 through the positive electrode liquid outlet pipe 122 and the corresponding conduit 323 for circulation, and the negative electrode electrolyte is transported to the corresponding storage tank 310 through the negative electrode liquid outlet pipe 132 and the corresponding conduit 323 for circulation. When discharging, the process is opposite to the above. Maintenance and repair: During disassembly, the flanges between the positive electrode liquid inlet pipe 121 and the conduit 323, the positive electrode liquid outlet pipe 122 and the circulation pipe 324, the negative electrode liquid inlet pipe 131 and the conduit 323, and the negative electrode liquid outlet pipe 132 and the circulation pipe 324 are disassembled. At this time, the battery stack unit 100 and the fastening unit 200 can be removed separately from the support plate 410; the bolt 252 is loosened, and under the action of the thread, the bolt 252 drives the tooth block 253 to move on the surface of the support plate 210 toward the hollow block 251 until the tooth block 253 is separated from the gear 2362, and the clamping assembly 230 is completed. The unlocking operation is completed; at this time, the gear 2362 can be rotated counterclockwise by the knob 2363, and the gear 2362 drives the boss 2361 and the rotating disk 231 to rotate synchronously, and the rotating disk 231 drives one end of the connecting rod 232 to rotate synchronously, and the length of the connecting rod 232 remains unchanged, so that the other end of the connecting rod 232 drives the push plate 233 to move toward the rotating disk 231, so that the two push plates 233 move synchronously towards each other, and the push plate 233 drives the wedge block 234 and the T-shaped slot 2351 to move synchronously, so that the push plate 233 slides on the surface of the guide rail 2352 until the wedge block 234 is separated from the wedge The inner cavity of the groove 1412 can complete the synchronous unlocking operation of multiple plug-in components 140; at this time, the clamping component 240 can be removed from the plug rod 141, and the multiple plug rods 141 are sequentially pulled out from the inner cavity of the socket 142 through the stopper 1411 to complete the disassembly operation of the battery stack unit 100; when maintenance or overhaul is completed and assembly is required, the multiple plug rods 141 are sequentially inserted into the corresponding sockets 142, so that the stopper 1411 contacts the positive terminal plate 120; then the spring 241 and the pressure ring 242 are sequentially sleeved on the plug rod 141, so that the negative terminal plate 130 The pressing ring 242 contacts the corresponding gasket 2411, and the knob 2363 is used to rotate the gear 2362 clockwise, so that the two push plates 233 move synchronously in opposite directions, and the push plates 233 drive the wedge block 234 to move synchronously until the wedge block 234 is inserted into the inner cavity of the corresponding wedge groove 1412, and one side of the wedge block 234 contacts one side of the pressing ring 242, so that the limiting operation of the plug-in assembly 140 can be completed, so that the plug rod 141 will not easily move in the inner cavity of the plug hole 142, so as to realize the preliminary assembly operation of the battery stack unit 100;Then continue to rotate the gear 2362, so that the wedge block 234 continues to be inserted into the corresponding wedge groove 1412. The direction of the force can be changed through the inclined surface structure on the wedge block 234 and the wedge groove 1412, so that the wedge block 234 can drive the push plate 233, the connecting rod 232, the rotating disk 231, the limit assembly 235, the rotating assembly 236, the support plate 210, the positioning assembly 250 and the side plate 221 to move synchronously toward the negative end plate 130, and the slider 223 slides in the inner cavity of the slide groove 222. At the same time, the wedge block 234 pushes the pressure ring 242, so that the pressure ring 242 squeezes the spring 241 through the gasket 2411, so that the spring 241 is forced to contract. The force is mutual, and the spring 241 also gives the negative terminal plate 130 and the wedge block 234 an identical reaction force until the positive terminal plate 120 and the negative terminal plate 130 firmly press the battery stack 110; then tighten the bolt 252 so that the tooth block 253 is meshed with the gear 2362, and the locking operation of the clamping assembly 230 can be completed to ensure the connection stability between the clamping assembly 230 and the plug assembly 140; finally, the flanges between the positive electrode liquid inlet pipe 121 and the conduit 323, the positive electrode liquid outlet pipe 122 and the circulation pipe 324, the negative electrode liquid inlet pipe 131 and the conduit 323, and the negative electrode liquid outlet pipe 132 and the circulation pipe 324 can be connected, and the assembly operation of the battery stack unit 100 can be completed. ;

[0034] Through the above specific implementations, those skilled in the art can easily implement the present invention. However, it should be understood that the present invention is not limited to the above specific implementations. On the basis of the disclosed implementations, those skilled in the art can arbitrarily combine different technical features to achieve different technical solutions.

Claims

1. A high-efficiency electric energy storage system based on flow battery, characterized in that: include: A battery stack unit (100) having a fastening unit (200) disposed thereon, an electrolyte storage unit (300) disposed below the battery stack unit (100), and a support unit (400) disposed between the battery stack unit (100) and the electrolyte storage unit (300); The battery stack unit (100) cooperates with the electrolyte storage unit (300) to achieve mutual conversion between electrical energy and chemical energy and energy storage through the change in the valence state of reactive substances; The fastening unit (200) is used to realize assembly and fixation of the battery stack unit (100); The support unit (400) is used to provide a support foundation for the battery stack unit (100).

2. The high-efficiency electric energy storage system based on flow battery according to claim 1 is characterized in that: The battery stack unit (100) comprises a battery stack (110), one side of the battery stack (110) is provided with a positive terminal plate (120), the other side of the battery stack (110) is provided with a negative terminal plate (130), the positive terminal plate (120) is penetrated by a positive electrode liquid inlet pipe (121) and a positive electrode liquid outlet pipe (122), one end of the positive electrode liquid inlet pipe (121) and the positive electrode liquid outlet pipe (122) are in communication with the battery stack (110), and the negative terminal plate (130) is penetrated by a negative electrode liquid inlet pipe (121). A positive electrode liquid inlet pipe (131) and a negative electrode liquid outlet pipe (132), one end of the negative electrode liquid inlet pipe (131) and the negative electrode liquid outlet pipe (132) are in communication with the battery stack (110), two groups of plug-in components (140) are arranged vertically between the positive terminal plate (120) and the negative terminal plate (130), each group of the plug-in components (140) has a plurality of plug-in components (140) distributed horizontally and equidistantly, and the plug-in components (140) are used to achieve a preliminary connection between the positive terminal plate (120) and the negative terminal plate (130); The plug assembly (140) comprises a plug rod (141), and the positive terminal plate (120) and the negative terminal plate (130) are both provided with a plug hole (142) for the plug rod (141) to pass through, the inner wall surface of the plug hole (142) is slidably connected to the outer surface of the corresponding plug rod (141), and a stopper (1411) is fixedly connected to one end of the plug rod (141) close to the positive terminal plate (120), and the diameter of the stopper (1411) is larger than the diameter of the plug hole (142); The fastening unit (200) comprises a support plate (210) located on one side of the negative terminal plate (130); two symmetrically arranged telescopic components (220) are provided between the support plate (210) and the negative terminal plate (130); a clamping component (230) is provided on the side of the support plate (210) close to the negative terminal plate (130); a pressing component (240) is provided on each of the insertion rods (141); and a positioning component (250) is provided on the side of the support plate (210) away from the negative terminal plate (130); The telescopic assembly (220) comprises a side plate (221) fixedly connected to a side of the support plate (210) close to the negative terminal plate (130), a slide groove (222) is provided at the top and bottom of the side plate (221), a sliding block (223) is slidably connected to the inner cavity of the sliding groove (222), and the sliding block (223) is connected to the negative terminal plate (130); The clamping assembly (230) comprises a rotating disk (231) movably arranged on a side of the support plate (210) facing the negative terminal plate (130); a side of the rotating disk (231) away from the support plate (210) is rotatably connected to two oppositely arranged connecting rods (232); an end of each connecting rod (232) away from the rotating disk (231) is movably provided with a push plate (233); a group of wedge blocks (234) are fixedly connected to opposite sides of the two push plates (233); each group of wedge blocks (234) is horizontally equidistant. There are a plurality of wedge blocks (234) arranged in one-to-one correspondence with the insertion rod (141); one end of the insertion rod (141) away from the stopper (1411) is provided with a wedge groove (1412) adapted to the wedge block (234); the wedge block (234) is clamped into the inner cavity of the corresponding wedge groove (1412); a limit assembly (235) is provided between the push plate (233) and the support plate (210); and a rotating assembly (236) used in conjunction with the positioning assembly (250) is provided on the rotating disk (231); The clamping assembly (240) comprises a spring (241) and a pressure ring (242) movably sleeved on the surface of the insertion rod (141); the spring (241) is located between the negative terminal plate (130) and the pressure ring (242); a side of the pressure ring (242) away from the spring (241) contacts a corresponding wedge block (234); and an inner wall surface of the pressure ring (242) is slidably connected to the surface of the insertion rod (141).

3. The high-efficiency electric energy storage system based on flow battery according to claim 2 is characterized in that: The support plate (210) is provided with regularly distributed through holes, and the ends of the negative electrode liquid inlet pipe (131) and the negative electrode liquid outlet pipe (132) away from the negative electrode end plate (130) pass through the corresponding through holes to one side of the support plate (210).

4. The high-efficiency electric energy storage system based on flow battery according to claim 3 is characterized in that: The push plate (233) is provided with a through slot (2331), and one end of the connecting rod (232) away from the rotating disk (231) passes through the inner cavity of the through slot (2331) and is rotatably connected.

5. The high-efficiency electric energy storage system based on flow battery according to claim 4 is characterized in that: The limiting assembly (235) comprises a T-shaped slot (2351) formed on the push plate (233); the inner cavity of the T-shaped slot (2351) is slidably connected to a guide rail (2352); one side of the guide rail (2352) is fixedly connected to the support plate (210).

6. A high-efficiency electric energy storage system based on flow battery according to claim 5, characterized in that: Gaskets (2411) are fixedly connected to both ends of the spring (241), one of the gaskets (2411) is in contact with the negative terminal plate (130), and the other gasket (2411) is in contact with the corresponding pressure ring (242).

7. The high-efficiency electric energy storage system based on flow battery according to claim 6 is characterized in that: The rotating assembly (236) comprises a rotating assembly (236) fixedly connected to the center of one side of the rotating disk (231), one end of the rotating assembly (236) movably penetrates one side of the supporting plate (210) and is fixedly connected to a gear (2362), and a side of the gear (2362) away from the supporting plate (210) is fixedly connected to a knob (2363).

8. The high-efficiency electric energy storage system based on flow battery according to claim 7, characterized in that: The positioning assembly (250) comprises a hollow block (251) fixedly connected to the support plate (210); a bolt (252) is provided through the inner cavity thread of the hollow block (251); one end of the bolt (252) is rotatably connected to a tooth block (253) meshing with the knob (2363) toward the gear (2362); one side of the tooth block (253) is slidably connected to the support plate (210).

9. The high-efficiency electric energy storage system based on flow battery according to claim 8, characterized in that: The electrolyte storage unit (300) comprises two storage tanks (310), wherein one of the storage tanks (310) is used to store positive electrode electrolyte, and the other storage tank (310) is used to store negative electrode electrolyte, and a circulation supply assembly (320) is provided between one of the storage tanks (310) and the positive terminal plate (120), and between the other storage tank (310) and the negative terminal plate (130), respectively; a frame (330) is sleeved on the surface of the storage tank (310), and a support (340) is fixedly connected to the bottom of the frame (330); The circulating supply assembly (320) comprises a pump body (321) located above the storage tank (310); a connecting pipe (322) is connected between the liquid inlet end of the pump body (321) and the storage tank (310); a conduit (323) is connected to the liquid outlet end of the pump body (321); an end of one conduit (323) away from the pump body (321) is connected to the positive electrode liquid inlet pipe (121); an end of the other conduit (323) away from the pump body (321) is connected to the negative electrode liquid inlet pipe (131); one end of the positive electrode liquid outlet pipe (122) and the negative electrode liquid outlet pipe (132) are respectively connected to a circulating pipe (324); the bottom end of the circulating pipe (324) is connected to the corresponding storage tank (310); valves are installed on the connecting pipe (322) and the circulating pipe (324).

10. The high-efficiency electric energy storage system based on flow battery according to claim 9, characterized in that: The support unit (400) comprises a support plate (410) located at the center above the two frames (330); a group of legs (420) are fixedly connected to both sides of the bottom of the support plate (410); each group of legs (420) is arranged in a one-to-one correspondence with each frame (330); each group of legs (420) is arranged in two front and rear positions; the bottom ends of the legs (420) are fixedly connected to the top of the corresponding frame (330); the bottoms of the positive terminal plate (120), the negative terminal plate (130) and the support plate (210) are all in contact with the top of the support plate (410); and the pump body (321) is mounted on the bottom of the support plate (410).

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