Dual-power-supply free switching circuit for auxiliary power utilization and power supply of energy storage equipment

Abstract

The invention relates to the technical field of electrochemical energy storage, in particular to a dual-power free switching circuit for auxiliary power supply of energy storage equipment, which comprises a mains supply input end, a standby power supply input end, an output end, a switching control module, a power supply detection module and a voltage detection sensor. According to the dual-power-supply free switching circuit, seamless switching between the mains supply and the standby power supply can be achieved, the switching time is controlled within 10 milliseconds, voltage impact on electric equipment caused by power supply interruption is avoided, the voltage state can be automatically monitored and the power supply can be rapidly switched by means of the voltage detection sensor and the power supply detection module, and after the mains supply is recovered, the standby power supply can be switched. According to the invention, the system employs the relay and the logic control circuit for power supply switching, is simple in design and low in cost, enables the configuration of the standby power supply to be more flexible through the modular design, and reduces the design and maintenance cost.

Description

Technical Field

[0001] The invention relates to the technical field of electrochemical energy storage, and in particular to a dual-power free switching circuit for auxiliary power supply of energy storage equipment. Background Art

[0002] With the continuous development of electrochemical energy storage technology, energy storage equipment has been widely used in many fields such as industry, commerce and home. Energy storage equipment can effectively solve problems such as power fluctuations and emergency power supply. However, in practical applications, traditional energy storage systems usually rely on mains power supply, but when the mains power cannot be supplied, the auxiliary power supply capacity of the energy storage system is greatly limited, and it is difficult to ensure the continuous operation of the system. The existing mains direct power supply system usually uses a single power supply. When the mains power supply is interrupted, the system will lose its power source and will not be able to continue to provide power support for the load equipment. The main defect of this design is that once the mains power is interrupted, the system will not be able to automatically switch to the backup power supply, resulting in the loss of power supply for energy storage equipment or other key power-consuming equipment, which seriously affects the operating stability and service life of the system. In response to this problem, a variety of solutions have been proposed in the prior art, such as manually or automatically switching the backup power supply to supplement the power supply when the mains power is interrupted. However, these technical solutions still have deficiencies in the speed, reliability and adaptability of power switching. For example, delays are prone to occur during the switching process between the mains power and the backup power supply, and the system cannot be powered in time, which may cause voltage shocks to key load equipment and affect the normal operation of the equipment. Summary of the invention

[0003] The purpose of the present invention is to solve the technical problems raised in the above background technology.

[0004] The present invention adopts the following technical solution: a dual-power free switching circuit for auxiliary power supply of energy storage equipment, including a mains power input terminal, a backup power input terminal, an output terminal, a switching control module, a power detection module and a voltage detection sensor. The switching control module is used to control the switching between the mains power and the backup power supply. The switching control module connects the mains power input terminal by default and disconnects the backup power input terminal. The mains power input terminal provides power to the output terminal through the switching control module.

[0005] Preferably, when the power detection module detects that there is no power input to the AC power input terminal and detects that there is power input to the backup power input terminal, the voltage detection sensor detects the backup power voltage, the switching control module automatically disconnects the AC power input terminal and connects the backup power input terminal, and the backup power input terminal provides power to the output terminal through the switching control module.

[0006] Preferably, the voltage detection sensor is used to detect the voltage status of the AC power and the backup power supply. When power is input to both the AC power input terminal and the backup power supply input terminal, the switching control module gives priority to connecting to the AC power input terminal. When the AC power is suddenly cut off, the switching control module quickly switches to the backup power supply input terminal based on the detection result of the voltage detection sensor to maintain continuous power supply to the output terminal.

[0007] Preferably, when the backup power input terminal is used as the main power supply, the voltage detection sensor continuously monitors the voltage status of the AC power input terminal. When it is detected that the AC power is restored, the switching control module automatically disconnects the backup power input terminal and restores the AC power input terminal to ensure that the system is powered by AC power.

[0008] Preferably, the switching control module comprises a relay and a logic control circuit, the relay is used to switch between the mains power and the backup power supply, and the logic control circuit controls the on and off of the relay according to the signals of the voltage detection sensor and the power detection module.

[0009] Preferably, the switching time of the relay is less than 10 milliseconds, and when switching between the mains power and the backup power supply, no voltage shock is generated to the electrical equipment at the output end.

[0010] Preferably, the backup power supply is an energy storage device, including a battery, a supercapacitor or other forms of energy storage devices, and the output end of the energy storage device is connected to the backup power supply input end of the switching control module.

[0011] Preferably, the capacity and power of the energy storage device are configured according to the needs of the electrical equipment at the output end, and when the city power is interrupted, the energy storage device provides sufficient power to maintain the normal operation of the electrical equipment.

[0012] Preferably, the power detection module is implemented using a digital circuit or an analog circuit to monitor the power status of the mains input terminal and the backup power input terminal in real time, and feed back to the logic control circuit through a voltage detection sensor.

[0013] Preferably, the voltage detection sensor includes a voltage comparator, a voltage divider circuit or other voltage monitoring elements to accurately monitor voltage changes between the mains power supply and the backup power supply.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are:

[0015] In the present invention, the dual power supply free switching circuit can achieve seamless switching between the mains power and the backup power supply, and the switching time is controlled within 10 milliseconds, thereby avoiding voltage shocks to electrical equipment caused by power interruptions. Relying on voltage detection sensors and power supply detection modules, it can automatically monitor the voltage status and quickly switch the power supply. After the mains power is restored, it automatically switches back to the mains power supply without manual intervention, thereby improving the automation and intelligence level of the system. Relays and logic control circuits are used for power switching, with a simple design and low cost. The modular design makes the backup power supply configuration more flexible, reducing the design and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention provides a circuit diagram of a dual power supply free switching circuit for auxiliary power supply of energy storage equipment. DETAILED DESCRIPTION

[0017] 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.

[0018] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0019] Example

[0020] See also Figure 1 , is a circuit diagram of the dual power free switching circuit in this embodiment. In this scheme (as shown in the figure), point ① is the input live wire of the AC power; point ④ is the input neutral wire of the AC power; point ⑦ is the input live wire of the backup power supply; point ⑨ is the input neutral wire of the backup power supply; ②⑧③ are the output live wires; ⑤⑩⑥ are the output neutral wires.

[0021] The present invention provides a technical solution: a dual power supply free switching circuit for auxiliary power supply of energy storage equipment, the circuit structure includes the following parts:

[0022] Mains input terminal: used to access external grid power supply as the main power source for energy storage equipment;

[0023] Backup power input: connected to energy storage devices, such as batteries or supercapacitors. When the mains power is interrupted, the backup power supply is used to supply power to the load.

[0024] Output terminal: connected to the load, the output terminal voltage provides stable power to the load;

[0025] Switching control module: mainly composed of relays and logic control circuits, used to switch between the mains power supply and the backup power supply. The relay switches the connection between the two power supplies according to the control signal;

[0026] Power supply detection module: used to monitor the power supply status of the mains power and backup power supply. When the mains power is interrupted or restored, the power supply detection module sends a signal to the switching control module;

[0027] Voltage detection sensor: used to monitor the voltage levels of the mains and backup power supplies in real time to ensure that voltage changes during switching do not affect the normal operation of the load.

[0028] Under normal circumstances, the AC input terminal provides power to the load. The power detection module detects that the AC voltage is normal. The voltage detection sensor connects the AC line through the switching control module, and the backup power line remains disconnected. When the AC power is interrupted, the power detection module detects that there is no voltage signal at the AC input terminal, and at the same time detects that the backup power supply has power input. At this time, the voltage detection sensor quickly disconnects the AC line and connects the backup power line through the switching control module, ensuring that the switching is completed within milliseconds to avoid affecting the load. When the backup power supply is in operation, the voltage detection sensor continuously monitors the AC voltage status. Once the AC power is restored, the switching control module automatically disconnects the backup power supply and resumes using the AC power supply.

[0029] See also Figure 1 ,In this embodiment, the circuit includes an AC side dual power supply circuit;

[0030] If the mains input terminal ①④ detects that there is power input through the circuit of the power module, the switch connected to the mains line is turned on by default, the switch connected to the backup power supply is disconnected, and the circuit of points ①④ is enabled to provide the output of ②⑧③ live wires and ⑤⑩⑥ neutral wires; if the mains input terminal ①④ detects that there is no power input through the circuit of the power module through the voltage detection sensor / and there is power input at the backup power point ⑦⑨, the switch connected to the backup power line is turned on by default, the switch connected to the mains is disconnected, and points ⑦⑨ of the backup circuit are enabled to supply power to the power supply, providing the output of ②⑧③ live wires and ⑤⑩⑥ neutral wires; the backup power supplies at points ①④ and ⑦⑨ of the mains input terminal are simultaneously When there is input access, in case of a sudden power outage of the mains, the switch connected to the mains is quickly disconnected through the detection of the voltage detection sensor, and the switch connected to the backup power supply line is turned on, and the backup power supply at points ⑦ and ⑨ is used to continuously maintain the output of the live wires ②⑧③ and the neutral wires ⑤⑩⑥; when the backup power supply at points ⑦ and ⑨ continues to be used as the output source, the voltage detection sensor detects that the power supply at points ① and ④ in the mains is restored, and then the switch connected to the backup circuit is disconnected, and points ① and ④ of the mains circuit are enabled to supply power to the power supply, providing the output of the live wires ②⑧③ and the neutral wires ⑤⑩⑥; this dual power switching time can be completed within 10mS, and no voltage shock will be generated to the electrical equipment.

[0031] This embodiment further optimizes the relay design of the switching control module, and the switching time is controlled within 10 milliseconds, ensuring that the load will not suffer from voltage fluctuations due to power switching when the mains power is interrupted and restored. It is especially suitable for precision equipment with high requirements for power supply, such as servers, communication equipment, etc. In addition, the logic control circuit adopts digital signal processing technology to achieve precise control of the relay through the signals fed back by the power detection module and the voltage detection sensor. The logic circuit realizes a variety of power switching modes through programming to adapt to different application scenarios.

[0032] In this embodiment, the backup power supply uses high-efficiency energy storage devices, such as supercapacitors and high-energy-density batteries. According to the different requirements of the load, the capacity and output power of the backup power supply can be flexibly configured to ensure that the energy storage device can provide continuous power supply for a sufficiently long time in the event of a city power outage. The energy storage system is managed by a charging control module. When the city power is restored, the energy storage device automatically enters a charging state to ensure that the backup power supply is always in the best power supply state. Through the intelligent management system, the user can monitor the power status and charging and discharging conditions of the energy storage device in real time, further improving the reliability and service life of the system.

[0033] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A dual power free switching circuit for auxiliary power supply of energy storage equipment, including a mains input terminal, a backup power input terminal, an output terminal, a switching control module, a power detection module and a voltage detection sensor, Features: The switching control module is used to control the switching between the mains power and the backup power supply. The switching control module connects the mains power input terminal by default and disconnects the backup power supply input terminal. The mains power input terminal provides power to the output terminal through the switching control module.

2. The dual power free switching circuit for auxiliary power supply of energy storage equipment according to claim 1, Features: When the power detection module detects that there is no power input to the AC power input terminal and detects that there is power input to the backup power input terminal, the voltage detection sensor detects the backup power voltage, the switching control module automatically disconnects the AC power input terminal and connects the backup power input terminal, and the backup power input terminal provides power to the output terminal through the switching control module.

3. The dual power free switching circuit for auxiliary power supply of energy storage equipment according to claim 1, Features: The voltage detection sensor is used to detect the voltage status of the mains power and the backup power supply. When power is input to both the mains power input terminal and the backup power input terminal, the switching control module gives priority to connecting to the mains power input terminal. When the mains power is suddenly cut off, the switching control module quickly switches to the backup power input terminal based on the detection result of the voltage detection sensor to maintain continuous power supply to the output terminal.

4. The dual power free switching circuit for auxiliary power supply of energy storage equipment according to claim 3, Features: When the backup power input terminal is used as the main power supply, the voltage detection sensor continuously monitors the voltage status of the AC input terminal. When it is detected that the AC power is restored, the switching control module automatically disconnects the backup power input terminal and restores the AC input terminal to ensure that the system is powered by AC power.

5. The dual power free switching circuit for auxiliary power supply of energy storage equipment according to claim 1, Features: The switching control module includes a relay and a logic control circuit. The relay is used to switch between the mains power and the backup power supply. The logic control circuit controls the on and off of the relay according to the signals of the voltage detection sensor and the power detection module.

6. The dual power free switching circuit for auxiliary power supply of energy storage equipment according to claim 5, Features: The switching time of the relay is less than 10 milliseconds, and when switching between the mains power and the backup power supply, no voltage shock will be generated to the electrical equipment at the output end.

7. The dual power free switching circuit for auxiliary power supply of energy storage equipment according to claim 1, Features: The backup power supply is an energy storage device, including a battery, a super capacitor or other forms of energy storage devices, and the output end of the energy storage device is connected to the backup power supply input end of the switching control module.

8. The dual power free switching circuit for auxiliary power supply of energy storage equipment according to claim 7, Features: The capacity and power of the energy storage device are configured according to the needs of the electrical equipment at the output end. When the mains power is interrupted, the energy storage device provides sufficient power to maintain the normal operation of the electrical equipment.

9. The dual power free switching circuit for auxiliary power supply of energy storage equipment according to claim 1, Features: The power detection module is implemented by a digital circuit or an analog circuit, monitors the power status of the mains input terminal and the backup power input terminal in real time, and feeds back to the logic control circuit through a voltage detection sensor.

10. The dual power free switching circuit for auxiliary power supply of energy storage equipment according to claim 1, Features: The voltage detection sensor includes a voltage comparator, a voltage divider circuit or other voltage monitoring elements to accurately monitor the voltage changes of the mains power and the backup power supply.

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