Non-electric self-starting device for all-vanadium redox flow battery system
By designing a self-starting device without power in the all-vanadium redox flow battery system, the problem of the battery's inability to start on its own is solved by using a handle to drive an impeller to deliver electrolyte to the stack reaction, thus realizing the release of electrical energy and battery self-starting without external power.
Patent Information
- Application Number
- CN202511731982.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-24
- Publication Date
- 2026-03-10
AI Technical Summary
In the absence of external power, the electrolyte in a vanadium redox flow battery system cannot enter the stack reaction autonomously, resulting in the inability to release electrical energy and complete self-starting.
Design a self-starting device without electricity. By rotating the handle of the device, the impeller is driven to transport the electrolyte in the storage tank to the fuel cell stack. The fuel cell stack reaction releases electrical energy, which is then transferred to the circulation pump to achieve battery self-starting.
It enables battery self-starting in the absence of an external power source, saving costs and providing quick and efficient access to electrical energy.
Smart Images
Figure CN121642067A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of vanadium redox flow battery system starting technology, specifically a power-free self-starting device for vanadium redox flow battery systems. Background Technology
[0002] The vanadium redox flow battery system mainly consists of four core modules: the stack, the liquid storage tank, the circulation system, and the control system. These components work together to achieve efficient storage and release of electrical energy. Its outstanding feature is that the energy storage capacity and power can be designed independently (the volume of the liquid storage tank determines the capacity, and the size of the stack determines the power), making it suitable for large-scale, long-term energy storage scenarios (such as wind-solar hybridization and grid peak shaving).
[0003] However, precisely because the energy storage capacity and power of the fuel cell stack are decoupled and independent, when the piping system is unable to operate due to various reasons (such as a power outage) and lacks external kinetic energy (the pump), the electrolyte in the storage tank cannot autonomously enter the fuel cell stack through the piping to react, thus preventing the release of electricity from the battery. In such situations, without external energy to start the pump, even if the battery is fully charged, it cannot be used by the equipment.
[0004] Therefore, a self-starting device needs to be designed so that the electrical energy in the fuel cell stack can be released even when the pump body is not started by external energy, so that the entire device can work normally. Summary of the Invention
[0005] To address the aforementioned problems, the present invention aims to provide a self-starting device for a vanadium redox flow battery system without power. When the device is without an external power source, rotating the handle drives the impeller in the pipeline to transport the electrolyte from the two storage tanks to the battery stack, thereby releasing electrical energy. The released electrical energy is then re-transported to the circulation pump, enabling the battery to discharge autonomously, thus completing the battery's self-starting.
[0006] The present invention provides a power-free self-starting device for a vanadium redox flow battery system, comprising a battery stack, a positive electrode storage tank, a first positive electrode circulation pipeline, a second positive electrode circulation pipeline, a negative electrode storage tank, a first negative electrode circulation pipeline, a second negative electrode circulation pipeline, a circulation pump, and a self-starting mechanism. The outlet of the positive electrode storage tank is connected to the fuel cell stack through the first positive electrode circulation pipeline, and the inlet of the positive electrode storage tank is connected to the fuel cell stack through the second positive electrode circulation pipeline. The outlet of the negative electrode storage tank is connected to the fuel cell stack through the first negative electrode circulation pipeline, and the inlet of the negative electrode storage tank is connected to the fuel cell stack through the second negative electrode circulation pipeline. Both the first positive electrode circulation pipeline and the first negative electrode circulation pipeline are equipped with circulation pumps and self-starting mechanisms; the circulation pumps are electrically connected to an external power source and a fuel cell stack, respectively.
[0007] A further improvement of the present invention is that the self-starting mechanism includes a pipe housing, an impeller assembly, and a handle; the impeller assembly includes a rotating shaft and an impeller; the impeller is disposed on the rotating shaft; The pipe housing has perforations on opposite sides; the impeller is located inside the pipe housing, and the two sides of the rotating shaft protrude from the perforations respectively; a first protrusion is provided at one end of the rotating shaft; the handle has a first groove that mates with the first protrusion; and connecting pipes that connect to the first positive or negative circulation pipe are provided at both ends of the pipe housing.
[0008] A further improvement of the present invention is that the self-starting mechanism further includes a bracket, an electrical connection structure, and a drive motor; The drive motor is mounted on the bracket, and the other end of the rotating shaft is connected to the shaft of the drive motor via an electrical connection structure; the drive motor is electrically connected to both an external power source and an electric stack; the electrical connection structure is electrically connected to both an external power source and an electric stack.
[0009] A further improvement of the present invention is that the electrical connection structure includes a first connection structure and a second connection structure; the first connection structure is disposed on the rotating shaft of the drive motor, and the second connection structure is disposed at the other end of the rotating shaft.
[0010] A further improvement of the present invention is that the first connection structure includes a first sleeve and an electromagnetic coil assembly. The first sleeve is sleeved on the rotating shaft of the drive motor. The first sleeve is provided with a second groove for accommodating the electromagnetic coil assembly. The electromagnetic coil assembly is electrically connected to an external power supply and a fuel cell stack via a connecting wire with a switch.
[0011] A further improvement of the present invention is that the second connecting structure includes a second sleeve and a magnetic chuck; the second sleeve is disposed on a rotating shaft, the second sleeve is provided with a third groove for accommodating the magnetic chuck, and the second sleeve and the magnetic chuck are connected by a telescopic rod.
[0012] A further improvement of the present invention is that when an external power source cannot be connected to the circulation pump, the positive electrolyte in the positive electrode storage tank can be driven into the fuel cell stack from the first positive electrode circulation pipeline by manually rotating the handle, and the negative electrolyte in the negative electrode storage tank can be driven into the fuel cell stack from the first negative electrode circulation pipeline. The positive electrolyte and the negative electrolyte react in the fuel cell stack to generate electrical energy, which is then supplied to the circulation pump, allowing the circulation pump to operate normally without an external power source.
[0013] The beneficial effects of this invention are: The self-starting mechanism of the present invention can save self-starting costs and can conveniently and quickly obtain electrical energy in the absence of electricity.
[0014] The self-starting mechanism of this invention features an electrical connection structure. Under normal power supply, the drive motor connects to the rotating shaft, driving the impeller to rotate. In the event of an external power failure, the electrical connection structure disconnects the drive motor from the rotating shaft, allowing the user to rotate the handle to drive the impeller and complete the process of electrolyte entering the fuel cell stack from the pipeline. Attached Figure Description
[0015] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the present invention; Figure 2 This is an exploded view of the self-starting mechanism of the present invention; Figure 3 This is a schematic diagram of the electrical connection structure of the present invention connected to an external power source; Figure 4 This is a cross-sectional view of the electrical connection structure of the present invention without being connected to an external power source.
[0017] Explanation of reference numerals in the attached figures 1. Fuel cell stack; 2. Positive electrode storage tank; 3. First positive electrode circulation pipeline; 4. Second positive electrode circulation pipeline; 5. Negative electrode storage tank; 6. First negative electrode circulation pipeline; 7. Second negative electrode circulation pipeline; 8. Circulation pump; 9. Self-starting mechanism; 91. Housing; 92. Rotating shaft; 93. Impeller; 94. Handle; 95. Electrical connection structure; 951. First sleeve; 952. Electromagnetic coil assembly; 953. Second sleeve; 954. Magnetic chuck; 955. Telescopic rod. Detailed Implementation
[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0019] The purpose of this invention is to provide a self-starting device for a vanadium redox flow battery system without power. When there is no external power source, the device rotates the handle to drive the impeller in the pipeline, which transports the electrolyte in the two storage tanks to the battery stack, thereby releasing electrical energy. The released electrical energy is then transported back to the circulation pump, enabling the battery to discharge autonomously, thus completing the self-starting of the battery.
[0020] Example 1:
[0021] This invention discloses a self-starting device for a vanadium redox flow battery system without power, comprising a battery stack 1, a positive electrode storage tank 2, a first positive electrode circulation pipeline 3, a second positive electrode circulation pipeline 4, a negative electrode storage tank 5, a first negative electrode circulation pipeline 6, a second negative electrode circulation pipeline 7, a circulation pump 8, and a self-starting mechanism. The outlet of the positive electrode storage tank 2 is connected to the battery stack 1 via the first positive electrode circulation pipeline 3, and the inlet of the positive electrode storage tank 2 is connected to the battery stack 1 via the second positive electrode circulation pipeline 4. The outlet of the negative electrode storage tank 5 is connected to the battery stack 1 via the first negative electrode circulation pipeline 6, and the inlet of the negative electrode storage tank 5 is connected to the battery stack 1 via the second negative electrode circulation pipeline 7. Both the first positive electrode circulation pipeline 3 and the first negative electrode circulation pipeline 7 are equipped with a circulation pump 8 and a self-starting mechanism 9. The circulation pump 8 is electrically connected to an external power source and the battery stack 1, respectively. Figure 1 As shown.
[0022] The self-starting mechanism 9 includes a pipe housing 91, an impeller assembly, and a handle 94; the impeller assembly includes a rotating shaft 92 and an impeller 93; the impeller 93 is disposed on the rotating shaft 92; through holes are provided on opposite sides of the pipe housing 91; the impeller 93 is located inside the pipe housing 91, and the two sides of the rotating shaft 92 respectively extend out from the through holes of the pipe housing 91; a first protrusion is provided at one end of the rotating shaft 92; the handle 94 is disposed in a first groove that mates with the first protrusion; connecting pipes for connecting to the first positive circulation pipe 3 or the first negative circulation pipe 6 are provided at both ends of the pipe housing 91, such as... Figure 2 As shown.
[0023] During normal use, an external power source provides the necessary power to the circulation pump 8. Under the action of the circulation pump 8, the positive electrolyte in the positive electrode storage tank 2 enters the fuel cell stack 1 through the first positive electrode circulation pipeline 3 and the self-starting mechanism 9. Under the action of the circulation pump 8, the negative electrolyte in the negative electrode storage tank 5 enters the fuel cell stack 1 through the first negative electrode circulation pipeline 6 and the self-starting mechanism 9 to react. After the reaction is completed, the positive electrolyte re-enters the positive electrode storage tank 2 through the second positive electrode circulation pipeline 4, and the negative electrolyte re-enters the negative electrode storage tank 5 through the second negative electrode circulation pipeline 7.
[0024] When the external power supply fails and the circulation pump 8 loses power, the first groove of the handle 94 is inserted into the first protrusion of the rotating shaft 92. By manually rotating the handle 94, the impeller 93 is rotated, which delivers the positive electrolyte from the positive electrode storage tank 2 and the negative electrolyte from the negative electrode storage tank 5 to the battery stack 1, thereby releasing electrical energy. The released electrical energy is then transmitted to the circulation pump 8 via the transmission line, enabling the battery to discharge autonomously. Afterward, it is no longer necessary to rotate the handle 94 to complete the battery's self-starting.
[0025] Example 2:
[0026] This embodiment further improves the self-starting mechanism.
[0027] The self-starting mechanism 9 in this embodiment also includes a bracket, an electrical connection structure, and a drive motor. The drive motor is mounted on the bracket (not shown in the figure), and the other end of the rotating shaft 92 is connected to the shaft of the drive motor via the electrical connection structure. The drive motor is electrically connected to both an external power source and the fuel cell stack 1. The electrical connection structure is electrically connected to both the external power source and the fuel cell stack 1. The electrical connection structure includes a first connection structure and a second connection structure; the first connection structure is located on the shaft of the drive motor, and the second connection structure is located at the other end of the rotating shaft 92, such as... Figure 3 , Figure 4 As shown.
[0028] Specifically, the first connecting structure includes a first sleeve 951 and an electromagnetic coil assembly 952. The first sleeve 951 is fitted onto the rotating shaft of the drive motor. The first sleeve 951 has a second groove for accommodating the electromagnetic coil assembly 952 (it should be noted that the electromagnetic coil assembly 952 does not rotate with the rotation of the drive motor shaft; it is merely fitted into the second groove within the first sleeve 951, and an additional support frame can be provided). The electromagnetic coil assembly 952 is electrically connected to an external power supply and the fuel cell stack 1 via a connecting wire with a switch. The second connecting structure includes a second sleeve 953 and a magnetic chuck 954. The second sleeve 953 is mounted on the rotating shaft 92 and has a third groove for accommodating the magnetic chuck 954. The second sleeve 953 and the magnetic chuck 954 are connected by telescopic rods 955. Preferably, four telescopic rods 955 are provided, and each of the four telescopic rods 955 is fitted with a spring. One end of the spring is mounted on the second sleeve 953, and the other end is connected to the magnetic chuck 954. When the electromagnetic coil assembly 952 is energized, it generates an attractive force, causing the magnetic chuck 954 to be attracted to the rotating shaft. Thus, through the first and second connecting structures, the rotating shaft 92 rotates with the rotation of the shaft, thereby causing the drive motor to drive the impeller 93 to rotate.
[0029] When the external power supply is normal, turning on the switch energizes the electromagnetic coil assembly 952, causing the magnetic chuck 954 to attach to the shaft of the drive motor. The drive motor shaft then drives the rotating shaft 92 via the electrical connection structure, thereby rotating the impeller 93, facilitating electrolyte delivery. When the external power supply fails, the electromagnetic coil assembly 952 is de-energized, preventing the magnetic chuck 954 from attaching to the shaft. In this case, the user can use the handle 94 to rotate the impeller 93 to initially energize the circulation pump 8, the drive motor, and the electromagnetic coil assembly 952. Once energized, the electricity in the fuel cell stack 1 can be released.
[0030] Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
Claims
1. A device for self-starting of a vanadium redox flow battery system without electricity, characterized in that, The application relates to a circulating pump for a fuel cell, which comprises a stack, a positive electrode liquid storage tank, a first positive electrode circulating pipeline, a second positive electrode circulating pipeline, a negative electrode liquid storage tank, a first negative electrode circulating pipeline, a second negative electrode circulating pipeline, a circulating pump and a self-starting mechanism. The outlet of the positive electrode liquid storage tank is connected with the stack through the first positive electrode circulating pipeline, and the inlet of the positive electrode liquid storage tank is connected with the stack through the second positive electrode circulating pipeline. The outlet of the negative electrode liquid storage tank is connected with the stack through the first negative electrode circulating pipeline, and the inlet of the negative electrode liquid storage tank is connected with the stack through the second negative electrode circulating pipeline. The first positive electrode circulating pipeline and the first negative electrode circulating pipeline are provided with the circulating pump and the self-starting mechanism.
2. A device for self-starting of a vanadium redox flow battery system without electricity according to claim 1, characterized in that, The self-starting mechanism comprises a pipeline shell, an impeller assembly and a handle. The pipeline shell is provided with perforations on opposite sides, the impeller is arranged in the pipeline shell, and the two sides of the rotating shaft are respectively arranged to pass through the perforations.
3. A device for self-starting of a vanadium redox flow battery system without electricity according to claim 2, characterized in that, The self-starting mechanism further comprises a bracket, an electric connection structure and a driving motor. The driving motor is arranged on the bracket, the other end of the rotating shaft is connected with the rotating shaft of the driving motor through the electric connection structure, the driving motor is electrically connected with an external power source and the stack, and the electric connection structure is electrically connected with the external power source and the stack.
4. An electroless self-starting device for a vanadium redox flow battery system according to claim 2, wherein, The electric connection structure comprises a first connection structure and a second connection structure.
5. A device for self-starting of a vanadium redox flow battery system without electricity according to claim 4, characterized in that, The first connection structure comprises a first sleeve and an electromagnetic coil group, the first sleeve is sleeved on the rotating shaft of the driving motor, the first sleeve is provided with a second recess for accommodating the electromagnetic coil group, and the electromagnetic coil group is electrically connected with the external power source and the stack through a connecting wire with a switch.
6. An electroless self-starting device for a vanadium redox flow battery system according to claim 5, wherein, The second connection structure comprises a second sleeve and a magnetic suction disc.
7. An electroless self-starting device for a vanadium redox flow battery system as claimed in claim 2, wherein, When the external power source cannot be connected with the circulating pump, the positive electrode electrolyte in the positive electrode liquid storage tank can be manually rotated to enter the stack from the first positive electrode circulating pipeline, the negative electrode electrolyte in the negative electrode liquid storage tank can be manually rotated to enter the stack from the first negative electrode circulating pipeline, the positive electrode electrolyte and the negative electrode electrolyte react in the stack to generate electric energy, and the generated electric energy is transmitted to the circulating pump, so that the circulating pump can normally work without the external power source.