Lead liquid flow battery energy storage system

Abstract

The invention relates to the technical field of energy storage systems, in particular to a lead liquid flow battery energy storage system. In order to solve the problems that small particles suspended in an electrolyte can be carried along with the flowing of the electrolyte, the performance of a battery is influenced, the internal resistance is increased, and even the decline of the battery is accelerated, the following technical scheme is provided: the battery reaction tank comprises a battery reaction tank, and one side of the battery reaction tank is provided with a storage box for storing the electrolyte; the battery reaction tank and the storage box are mounted and fixed through a fixing frame; the recovery assembly is mounted on the battery reaction tank and the storage box, the recovery assembly is used for recovering acid mist and comprises an air pump mounted at the top of the battery reaction tank, the output end of the air pump is connected with an air delivery pipe, and one end of the air delivery pipe is connected to one side of the storage box. According to the invention, the electrolyte in the acid mist can be fully utilized, small particles in the electrolyte can be effectively removed, and the efficient and stable operation of the battery can be maintained.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage systems, and in particular to a lead liquid flow battery energy storage system. Background Art

[0002] Lead liquid flow battery is a new type of renewable energy storage technology that combines the advantages of lead-acid batteries and the characteristics of liquid flow batteries. Its basic principle is to use the chemical reaction of lead to store and release electrical energy. During the charge and discharge process of the lead liquid flow battery, the lead and lead oxide on the electrode react chemically with the sulfuric acid solution to generate lead sulfate. These lead sulfates may not be completely dissolved under certain conditions, especially during the discharge process of the battery, the lead sulfate may exist in the electrolyte in the form of tiny particles. At the same time, during the flow of the electrolyte, the particles of the electrode material may be peeled off and enter the electrolyte to become suspended particles. These tiny particles can be suspended in the electrolyte and carried with the flow of the electrolyte. It may affect the performance of the battery, increase the internal resistance, and even accelerate the degradation of the battery. In view of this, the present invention proposes a lead liquid flow battery energy storage system. Summary of the invention

[0003] The purpose of the present invention is to propose a lead liquid flow battery energy storage system to address the problem in the background technology that tiny particles suspended in the electrolyte can be carried along with the flow of the electrolyte, affecting the performance of the battery, increasing the internal resistance, and even accelerating the battery degradation.

[0004] The technical solution of the present invention is as follows: a lead liquid flow battery energy storage system, comprising a battery reaction tank, a storage box for storing electrolyte is arranged on one side of the battery reaction tank, and the battery reaction tank and the storage box are both fixed and installed by a fixing frame; a recovery component installed on the battery reaction tank and the storage box, the recovery component is used to recover acid mist, the recovery component comprises an air pump installed on the top of the battery reaction tank, the output end of the air pump is connected to an air supply pipe, one end of the air supply pipe is connected to one side of the storage box, the acid mist is passed into the electrolyte to recover the mist electrolyte in the acid mist, a guide block is arranged at the bottom of the storage box, a collection box is arranged at the bottom of the storage box, the collection box is used to collect tiny particles in the electrolyte; a circulation mechanism is arranged between the battery reaction tank and the storage box, the circulation mechanism is used to drive the electrolyte to circulate; an auxiliary discharge component is installed at the bottom of the storage box, the auxiliary discharge component is convenient for discharging tiny particles precipitated in the electrolyte; a filtering recovery structure connected to the bottom of the storage box, the filtering recovery structure is used to discharge and filter and recover the electrolyte to remove tiny particles.

[0005] Optionally, the circulation mechanism includes a liquid return pipe connected between the bottom of the battery reaction tank and the storage tank. A first liquid pump is installed at the top of the storage tank. The output end of the first liquid pump is connected to an output pipe, and one end of the output pipe is connected to the battery reaction tank. The inlet of the input pipeline of the first liquid pump is located below the electrolyte liquid level in the storage tank.

[0006] Optionally, the auxiliary discharge assembly includes two sliding rods respectively slidably connected to both sides of the collection box. One end of the sliding rod is fixedly connected to a push plate slidably connected in the collection box. The end of the sliding rod away from the push plate is fixedly connected to a synchronization plate, and the synchronization plate is L-shaped.

[0007] Optionally, a threaded sleeve is fixedly connected to the side of the synchronization plate. A threaded rod is commonly threadedly connected in the two threaded sleeves, and the thread directions at both ends of the threaded rod are opposite. A positioning plate is rotatably connected to the threaded rod, and the positioning plate is fixedly connected to the bottom of the storage tank. An installation frame is also installed at the bottom of the storage tank, and the installation frame is in a "冂" shape. The threaded rod is rotatably connected in the installation frame.

[0008] Optionally, an installation plate is also fixedly connected to the bottom of the storage tank. A servo motor is installed on the side of the installation plate away from the installation frame. The output end of the servo motor penetrates through the installation plate and the installation frame and is fixedly connected to the threaded rod.

[0009] Optionally, the filtration and recovery structure includes a discharge pipe installed at the bottom of the collection box. An electromagnetic valve is installed on the discharge pipe. A first clamping block is fixedly connected to the bottom of the discharge pipe. A filter cartridge is arranged on the side of the first clamping block away from the discharge pipe. A second clamping block is sleeved at one end of the filter cartridge away from the first clamping block, and a connecting pipe is connected to the upper bottom of the second clamping block.

[0010] Optionally, one end of the connecting pipe away from the second clamping block is fixedly connected to a communication box. The communication box is in a box shape with an L shape. The top of the communication box is open, and an adjustment box is slidably connected at the open position. A second liquid pump is also installed on the fixed frame. The input end of the second liquid pump is communicated with the adjustment box through a pipeline, and the output end of the second liquid pump conveys electrolyte into the storage tank through a pipeline.

[0011] Optionally, a fixed plate is installed on the fixed frame. A push rod motor is installed at the bottom of the fixed plate. The output end of the push rod motor is fixedly connected to the communication box, and the adjustment box is fixedly connected to the fixed plate.

[0012] Optionally, a tail gas pipe is arranged at the top of the storage tank, and a filter is also installed at the top of the tail gas pipe.

[0013] In summary, the present application includes at least one of the following beneficial technical effects: The present invention extracts the acid mist generated in the battery reaction tank by setting a recovery component. After the acid mist contacts the electrolyte in the storage box, the tiny droplets in the acid mist dissolve in the electrolyte, which is convenient for reusing the tiny droplets. At the same time, the tiny particles settle at the position of the collection box due to their own gravity, which prevents the tiny particles from affecting the operation of the battery reaction tank. Furthermore, by setting the filtering and recovery structure, after the second liquid pump is started, the electrolyte in the storage box can be driven to filter through the filter cartridge to filter the tiny particles therein, thereby preventing the tiny particles from accumulating too much, and the precipitated tiny particles can be discharged through the discharge pipe through the auxiliary discharge component; In summary, the present invention can fully utilize the electrolyte in the acid mist and effectively remove the tiny particles in the electrolyte to maintain the efficient and stable operation of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of a lead liquid flow battery energy storage system; Figure 2 yes Figure 1 A schematic cross-sectional structure diagram of ; Figure 3 It is a schematic diagram of the structure of the collection box; Figure 4 is a schematic diagram of the structure of the auxiliary discharge assembly; Figure 5 It is a cross-sectional schematic diagram of the filtration recovery structure.

[0015] Reference numerals: 1. Battery reaction tank; 2. Storage box; 3. Recovery component; 31. Air pump; 32. Air pipe; 33. Guide block; 34. Collection box; 4. Exhaust pipe; 41. Filter; 5. Circulation mechanism; 51. Liquid return pipe; 52. First liquid pump; 53. Output pipe; 6. Auxiliary discharge assembly; 61. Sliding rod; 62. Push plate; 63. Synchronous plate; 64. Threaded sleeve; 65. Threaded rod; 66. Positioning plate; 67. Mounting frame; 68. Mounting plate; 69. Servo motor; 7. Filtration recovery structure; 71. Discharge pipe; 72. First clamping block; 73. Filter cartridge; 74. Second clamping block; 75. Connecting pipe; 76. Connecting box; 77. Adjusting box; 78. Second liquid pump; 79. Push rod motor; 8. Fixed frame; 81. Fixed plate. DETAILED DESCRIPTION

[0016] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0017] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0018] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] Example

[0022] like Figure 1 As shown, a lead liquid flow battery energy storage system proposed by the present invention includes a battery reaction tank 1. The battery reaction tank 1 generates electricity when it works. This is a prior art and will not be elaborated on here. A storage box 2 for storing electrolyte is provided on one side of the battery reaction tank 1. The battery reaction tank 1 and the storage box 2 are both installed and fixed by a fixing frame 8, and the positions of the battery reaction tank 1 and the storage box 2 are fixed. A temperature sensor and a temperature control module are provided in the storage box 2 to ensure that the electrolyte in the storage box 2 is at an optimal working temperature and to ensure the normal operation of the battery. Two groups of storage tanks (such as Figure 1), pure water and concentrated sulfuric acid are stored in the two groups of storage tanks respectively, and a specific gravity monitor is provided in the storage box 2 to detect the specific gravity of the electrolyte, and water or sulfuric acid is automatically added according to the specific gravity requirement of the electrolyte in the storage box 2. This is the prior art and will not be elaborated on here.

[0023] For details, please refer to Figure 2 The energy storage system includes a recovery component 3 installed on the battery reaction tank 1 and the storage box 2, and the recovery component 3 is used to recover the acid mist. The recovery component 3 includes an air pump 31 installed on the top of the battery reaction tank 1, and the air pump 31 is used to suck out the acid mist generated in the battery reaction tank 1. The output end of the air pump 31 is connected to an air pipe 32, and one end of the air pipe 32 is connected to one side of the storage box 2. The acid mist is passed into the electrolyte to recover the mist electrolyte in the acid mist. The acid mist enters the storage box 2 through the air pipe 32. At the same time, the acid mist contacts the electrolyte in the storage box 2, and the tiny droplets in the acid mist are dissolved in the electrolyte, and the tiny droplets, i.e., the liquefied electrolyte, are recovered. A guide block 33 is provided at the bottom of the storage box 2, and a collection box 34 is installed at the bottom of the storage box 2. The collection box 34 is used to collect tiny particles in the acid mist, so that the tiny particles can be concentrated at the position of the collection box 34 under the influence of gravity through the guiding effect of the guide block 33, which is convenient for centralized discharge.

[0024] A tail gas pipe 4 is provided on the top of the storage box 2 to facilitate the discharge of the remaining gas after the acid mist contacts the electrolyte. A filter 41 is also installed on the top of the tail gas pipe 4 to filter the gas to prevent environmental pollution.

[0025] Furthermore, the energy storage system includes a circulation mechanism 5 disposed between the battery reaction tank 1 and the storage box 2, and the circulation mechanism 5 is used to drive the electrolyte to circulate. The circulation mechanism 5 includes a liquid return pipe 51 connected between the bottom of the battery reaction tank 1 and the storage box 2, and a first liquid pump 52 is installed on the top of the storage box 2. The output end of the first liquid pump 52 is connected to an output pipe 53, and one end of the output pipe 53 is connected to the battery reaction tank 1. The inlet of the input pipeline of the first liquid pump 52 is located below the electrolyte level in the storage box 2, so as to drive the electrolyte to circulate and realize the operation of the battery reaction tank 1.

[0026] Furthermore, if Figure 3 and Figure 4As shown in the figure, the above energy storage system includes an auxiliary discharge assembly 6 installed at the bottom of the storage tank 2, and the auxiliary discharge assembly 6 facilitates the discharge of tiny particles precipitated in the electrolyte. The auxiliary discharge assembly 6 includes two sliding rods 61 respectively slidably connected to both sides of the collection box 34. One end of the sliding rod 61 is fixedly connected to a push plate 62 slidably connected in the collection box 34, and the push plate 62 moves synchronously with the sliding rod 61. The end of the sliding rod 61 away from the push plate 62 is fixedly connected to a synchronous plate 63, and when the synchronous plate 63 moves, it drives the sliding rod 61 to move synchronously through the push plate 62. The synchronous plate 63 is L-shaped, and a threaded sleeve 64 is fixedly connected to the side surface of the synchronous plate 63. When the threaded sleeve 64 moves, it drives the synchronous plate 63 to move synchronously. A threaded rod 65 is commonly threadedly connected to the two threaded sleeves 64, and the thread directions at both ends of the threaded rod 65 are opposite. When the threaded rod 65 rotates, it drives the two threaded sleeves 64 to move synchronously, and the moving directions of the two threaded sleeves 64 are opposite. A positioning plate 66 is rotatably connected to the threaded rod 65, and the positioning plate 66 is fixedly connected to the bottom of the storage tank 2. An installation frame 67 is also installed at the bottom of the storage tank 2. The installation frame 67 is in a "冂" shape, and the threaded rod 65 is rotatably connected in the installation frame 67. The positioning plate 66 and the installation frame 67 keep the threaded rod 65 rotating in place. A mounting plate 68 is also fixedly connected to the bottom of the storage tank 2. A servo motor 69 is installed on the side of the mounting plate 68 away from the installation frame 67. The output end of the servo motor 69 passes through the mounting plate 68 and the installation frame 67 and is fixedly connected to the threaded rod 65. The servo motor 69 is used to drive the threaded rod 65 to rotate.

[0027] It is worth mentioning that please refer to Figure 3 and Figure 5The energy storage system includes a filtering and recovering structure 7 connected to the bottom of the storage box 2. The filtering and recovering structure 7 is used to discharge and filter and recover the electrolyte to remove tiny particles. The filtering and recovering structure 7 includes a discharge pipe 71 installed at the bottom of the collection box 34, which is convenient for discharging the electrolyte in the storage box 2 and the tiny particles deposited at the position of the collection box 34. A solenoid valve is installed on the discharge pipe 71. A first clamp block 72 is fixedly connected to the bottom of the discharge pipe 71. A filter cartridge 73 is arranged on the side of the first clamp block 72 away from the discharge pipe 71. The end of the filter cartridge 73 away from the first clamp block 72 is sleeved with a second clamp block 74. The first clamp block 72 and the second clamp block 74 are used to clamp and fix the filter cartridge 73. At the same time, the electrolyte is filtered when the electrolyte passes through the filter cartridge 73 to remove tiny particles in the electrolyte. A connecting pipe 75 is connected to the bottom of the second clamp block 74. A connecting box 76 is fixedly connected to the end of the connecting pipe 75 away from the second clamp block 74. The connecting box 76 moves synchronously with the second clamp block 74 through the connecting pipe 75. The connecting box 76 is an L-shaped box, the top of the connecting box 76 is an opening, and the opening position is slidably connected with an adjusting box 77, and a sealing ring is provided at the sliding position to ensure sealing. A second liquid pump 78 is also installed on the fixed frame 8, and the input end of the second liquid pump 78 is connected with the adjusting box 77 through a pipeline, and a solenoid valve is provided on the pipeline. The output end of the second liquid pump 78 transports electrolyte to the storage box 2 through a pipeline. A fixed plate 81 is installed on the fixed frame 8, and a push rod motor 79 is installed at the bottom of the fixed plate 81. The output end of the push rod motor 79 is fixedly connected to the connecting box 76, and the adjusting box 77 is fixedly connected to the fixed plate 81. The push rod motor 79 is used to drive the connecting box 76 to move, thereby driving the second clamping block 74 to approach or move away from the first clamping block 72, so as to facilitate the removal and replacement of the filter cartridge 73.

[0028] In this embodiment, the battery reaction tank 1 generates acid mist during operation, and the air pump 31 is started to extract the acid mist and transport it to the storage box 2 to mix with the electrolyte, and the tiny droplets in the acid mist are dissolved in the electrolyte. At the same time, under the influence of gravity, the tiny particles enter the moving collection box 34 after being guided by the guide block 33. The second liquid pump 78 is started, and the solenoid valve on the discharge pipe 71 is opened at the same time, so that the electrolyte in the collection box 34 passes through the discharge pipe 71 together with the tiny particles, and is filtered by the filter cartridge 73, and then passes through the connecting box 76 and the regulating box 77 in sequence and enters the second liquid pump 78, and then re-enters the storage box 2. After filtering by the filter cartridge 73, the tiny particles are removed to prevent the accumulation of tiny particles. At the same time, when the tiny particles are discharged, the servo motor 69 is started, and the servo motor 69 drives the threaded rod 65 to rotate. Since the thread directions of the two ends of the threaded rod 65 are opposite, and the two sets of threaded sleeves 64 are both threadedly connected to the threaded rod 65, the threaded rod 65 drives the two sets of threaded sleeves 64 to approach each other when rotating. At the same time, the two sets of synchronous plates 63 are driven to approach each other, and the push plates 62 are driven to move synchronously through the sliding rod 61. The two sets of push plates 62 slide in the collecting box 34 and approach each other, so as to drive the tiny particles to be discharged from the middle discharge pipe 71.

[0029] At the same time, when the filter cartridge 73 needs to be replaced, the electromagnetic valves at the discharge pipe 71 and the input end of the second liquid pump 78 are closed, and then the push rod motor 79 is started to extend, driving the connecting box 76 to move downward, and the position of the regulating box 77 is fixed, so that the pressure inside the regulating box 77 is reduced. At this time, the filter cartridge 73 and the second clamp block 74 move synchronously and move away from the first clamp block 72. Since the pressure in the regulating box 77 is reduced, the electrolyte remaining in the position of the discharge pipe 71, the first clamp block 72, and the filter cartridge 73 can be sucked into the connecting pipe 75, the connecting box 76 and the regulating box 77, so as to prevent the electrolyte from leaking and polluting the surrounding environment when the filter cartridge 73 is replaced. At the same time, the liquid level in the regulating box 77 is lower than the second clamp block 74, so as to prevent the electrolyte from flowing back.

[0030] The above specific embodiment is only an optional embodiment of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above embodiment, those skilled in the art can make various alternative improvements and combinations to the above specific embodiment.

Claims

1. A lead liquid flow battery energy storage system, characterized in that: Including: A battery reaction tank (1), on one side of the battery reaction tank (1), there is a storage tank (2) for storing electrolyte, and both the battery reaction tank (1) and the storage tank (2) are installed and fixed through a fixing frame (8); A recovery assembly (3) installed on the battery reaction tank (1) and the storage tank (2), the recovery assembly (3) is used for recovering acid mist, the recovery assembly (3) includes an air pump (31) installed on the top of the battery reaction tank (1), the output end of the air pump (31) is connected to an air delivery pipe (32), one end of the air delivery pipe (32) is connected to one side of the storage tank (2), and the acid mist is introduced into the electrolyte to recover the misty electrolyte in the acid mist. A guide block (33) is arranged at the bottom of the storage tank (2), and a collection box (34) is installed at the bottom of the storage tank (2), and the collection box (34) is used for collecting tiny particles in the electrolyte; A circulation mechanism (5) arranged between the battery reaction tank (1) and the storage tank (2), the circulation mechanism (5) is used for driving the electrolyte to circulate; An auxiliary discharge assembly (6) installed at the bottom of the storage tank (2), the auxiliary discharge assembly (6) facilitates the discharge of tiny particles precipitated in the electrolyte; A filtration and recovery structure (7) communicated with the bottom of the storage tank (2), the filtration and recovery structure (7) is used for discharging and filtering and recovering the electrolyte to remove tiny particles.

2. A lead liquid flow battery energy storage system according to claim 1, characterized in that: The circulation mechanism (5) includes a liquid return pipe (51) connected between the bottom of the battery reaction tank (1) and the storage tank (2), a first liquid pump (52) is installed on the top of the storage tank (2), the output end of the first liquid pump (52) is connected to an output pipe (53), one end of the output pipe (53) is connected to the battery reaction tank (1), and the inlet of the input pipeline of the first liquid pump (52) is located below the liquid level of the electrolyte in the storage tank (2).

3. A lead liquid flow battery energy storage system according to claim 2, characterized in that: The auxiliary discharge assembly (6) includes two sliding rods (61) respectively slidably connected to both sides of the collection box (34), one end of the sliding rod (61) is fixedly connected to a push plate (62) slidably connected in the collection box (34), and the end of the sliding rod (61) far from the push plate (62) is fixedly connected to a synchronization plate (63), and the synchronization plate (63) is L-shaped.

4. A lead liquid flow battery energy storage system according to claim 3, characterized in that: A threaded sleeve (64) is fixedly connected to the side surface of the synchronization plate (63), a threaded rod (65) is commonly threadedly connected in the two threaded sleeves (64), and the thread directions at both ends of the threaded rod (65) are opposite. A positioning plate (66) is rotatably connected to the threaded rod (65), the positioning plate (66) is fixedly connected to the bottom of the storage tank (2), and an installation frame (67) is further installed at the bottom of the storage tank (2), the installation frame (67) is in a "冂" shape, and the threaded rod (65) is rotatably connected in the installation frame (67).

5. A lead liquid flow battery energy storage system according to claim 4, characterized in that: The bottom of the storage box (2) is also fixedly connected to a mounting plate (68), a servo motor (69) is mounted on a side of the mounting plate (68) away from the mounting frame (67), and an output end of the servo motor (69) passes through the mounting plate (68) and the mounting frame (67) and is fixedly connected to the threaded rod (65).

6. A lead liquid flow battery energy storage system according to claim 5, characterized in that: The filtering and recovery structure (7) comprises a discharge pipe (71) mounted on the bottom of the collection box (34); a solenoid valve is mounted on the discharge pipe (71); a first clamping block (72) is fixedly connected to the bottom of the discharge pipe (71); a filter cartridge (73) is arranged on the side of the first clamping block (72) away from the discharge pipe (71); a second clamping block (74) is sleeved on the end of the filter cartridge (73) away from the first clamping block (72); and a connecting pipe (75) is connected to the bottom of the second clamping block (74).

7. A lead liquid flow battery energy storage system according to claim 6, characterized in that: The end of the connecting tube (75) away from the second clamping block (74) is fixedly connected to a connecting box (76); the connecting box (76) is an L-shaped box; the top of the connecting box (76) is open, and the opening is slidably connected to an adjusting box (77); a second liquid pump (78) is also mounted on the fixed frame (8); the input end of the second liquid pump (78) is connected to the adjusting box (77) via a pipeline; and the output end of the second liquid pump (78) transports electrolyte into the storage box (2) via a pipeline.

8. A lead liquid flow battery energy storage system according to claim 7, characterized in that: A fixing plate (81) is mounted on the fixing frame (8), a push rod motor (79) is mounted on the bottom of the fixing plate (81), an output end of the push rod motor (79) is fixedly connected to the connecting box (76), and the regulating box (77) is fixedly connected to the fixing plate (81).

9. A lead liquid flow battery energy storage system according to claim 1, characterized in that: An exhaust pipe (4) is arranged on the top of the storage box (2), and a filter (41) is also installed on the top of the exhaust pipe (4).

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