Dual-power system

Abstract

The invention discloses a dual-power-supply system which comprises a first power supply, a second power supply, a control module, a monitoring module and a relay. The first power supply and the second power supply are electrically connected with the relay, and the relay is electrically connected with the load; the monitoring module is electrically connected with the first power supply, the second power supply and the relay, and is used for obtaining current and voltage flowing out of the first power supply and the second power supply. The beneficial effects are that through the monitoring module and the protection module, the risk of single-point fault is eliminated, and even if a certain power supply has a fault, the system can still continuously and stably supply power.

Description

Technical Field

[0001] The present invention relates to the field of new energy batteries, and in particular to a dual power supply system. Background Art

[0002] Power quality is an important issue for both power suppliers and users, as it directly affects the normal operation of the load. With the development of the national economy and science and technology, users have higher and higher requirements for power quality. In order to improve power supply reliability, large industrial enterprises often have DC power supplies and backup power supplies installed.

[0003] The current dual power supply system has many defects when in use. When a single power supply has a defect, it is easy to cause the entire system to fail to operate normally. Summary of the invention

[0004] Purpose of the invention: The purpose of the present invention is to solve the defect in the prior art that when a single power supply has a problem, it is easy to cause the entire system to fail to operate, and to provide a dual power supply system that constantly monitors the voltage and current emitted by the first power supply and the second power supply. When it is determined that one of the first power supply or the second power supply is abnormal, the other power supply is immediately disconnected and used for continuous and stable power supply to maintain the normal operation of the system.

[0005] Technical solution:

[0006] The present application proposes a dual power supply system, including a first power supply, a second power supply, a control module, a monitoring module and a relay;

[0007] The first power source and the second power source are electrically connected to a relay respectively, and the relay is electrically connected to a load;

[0008] The monitoring module is electrically connected to the first power supply, the second power supply and the relay respectively, and is used to obtain the current and voltage flowing out of the first power supply and the second power supply;

[0009] The control module is electrically connected to the monitoring module and the relay respectively, and is used to obtain the current and voltage monitored by the monitoring module to control the switching state of the relay.

[0010] Preferably, the monitoring module includes a current sensor, which is connected in series between the load and the relay to monitor the current flowing out of the first power supply and the second power supply.

[0011] Preferably, the monitoring module includes a first voltage sensor and a second voltage sensor electrically connected to the control module, the first voltage sensor is connected in parallel to the output end of the first power supply, and the second voltage sensor is connected in parallel to the output end of the second power supply to monitor the voltages of the first power supply and the second power supply output ends.

[0012] Preferably, a protection module is further included, and the protection module is electrically connected to the control module.

[0013] Preferably, the protection module includes an overload protection unit, which is electrically connected between the relay and the load and is used for disconnecting when the current between the relay and the load exceeds a preset threshold.

[0014] Preferably, the protection module comprises a short-circuit protection unit, which is electrically connected between the relay and the load and is used for disconnecting when the current between the relay and the load exceeds a preset threshold.

[0015] Preferably, it also includes a first indicator light and a second indicator light electrically connected to the control module, for displaying the power supply status of the first power source and the second power source.

[0016] Preferably, it also includes an operation button electrically connected to the control module.

[0017] Preferably, the negative electrode of the load, the negative electrode of the first power supply and the negative electrode of the second power supply are grounded.

[0018] Preferably, it also includes an analog multiplexer, which is electrically connected to the first voltage sensor, the control module and the second voltage sensor respectively, and is used to read the signals of the first voltage sensor and the second voltage sensor through a common digital-to-analog converter for the multi-channel voltage signals.

[0019] Beneficial effects: Through the functions of the monitoring module and the protection module, the risk of single point failure is eliminated, ensuring that even if a power supply fails, the system can continue to supply power stably. Through real-time monitoring and control, once the circuit has excessive current and short circuit, the circuit can be cut off immediately, and the circuit can be effectively protected to avoid damage to the load. The voltage of the two power supply systems is monitored in real time to ensure the stability and consistency of the voltage when the dual power supplies are supplied at the same time, thereby ensuring the high reliability and safety of the system while effectively responding to the sudden increase in load demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Provide a system structure block diagram for the present invention;

[0021] Figure 2 It is a specific structural block diagram of the system of the present invention.

[0022] Figure numerals: 1. first power supply; 2. second power supply; 3. control module; 4. monitoring module; 5. relay; 6. load; 7. current sensor; 8. first voltage sensor; 9. second voltage sensor; 10. overload protection unit; 11. short circuit protection unit; 12. first indicator light; 13. second indicator light; 14. operation button; 15. analog multiplexer. DETAILED DESCRIPTION

[0023] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the specific embodiments of the accompanying drawings.

[0024] Example 1

[0025] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with general skills in the field to which the present invention belongs. "Including" and similar words used in this article mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0026] In view of the problems existing in the existing technology, such as Figure 1 As shown, a dual power supply system includes a first power supply 1, a second power supply 2, a control module 3, a monitoring module 4 and a relay 5;

[0027] The first power source 1 and the second power source 2 are electrically connected to the relay 5 respectively, and the relay 5 is electrically connected to the load 6;

[0028] The monitoring module 4 is electrically connected to the first power source 1, the second power source 2 and the relay 5 respectively, and is used to obtain the current and voltage flowing out of the first power source 1 and the second power source 2;

[0029] The control module 3 is electrically connected to the monitoring module 4 and the relay 5 respectively, and is used to obtain the current and voltage monitored by the monitoring module 4 to control the switching state of the relay 5 .

[0030] Specifically, the voltage generated by the first power supply and the second power supply and the current flowing to the load can be effectively obtained through the monitoring module. The first power supply 1 and the second power supply 2 are respectively connected to the relay 5 through wires. The relay 5 has two input terminals and an output terminal. The input terminals are respectively connected to the first power supply 1 and the second power supply 2, and the output terminal is connected to the load 6. The switching state of the relay 5 is controlled by the control module 3. Under normal circumstances, the control module 3 will select one of the power supplies as the main power supply and the other power supply as the backup power supply. When the main power supply fails, specifically, the states of the first power supply and the second power supply are obtained through the monitoring module, and the control module 3 will immediately switch to the backup power supply to ensure uninterrupted power supply to the load 6;

[0031] The control module 3 is responsible for making decisions based on the data provided by the monitoring module 4. It selects which power supply to supply power to the load 6 by controlling the switch state of the relay 5. The specific control logic is as follows:

[0032] Normal working mode: when the system starts, the control module 3 selects the first power supply 1 as the main power supply and the second power supply 2 as the backup power supply. At this time, the normally open contact of the relay 5 is closed, and the first power supply 1 supplies power to the load 6;

[0033] Fault detection and switching: When the monitoring module 4 detects that the first power supply 1 has a fault, such as too low or too high voltage, the control module 3 will immediately issue a command to disconnect the normally open contact of the relay 5 and switch the second power supply 2 to the main power supply to continue to supply power to the load 6. Similarly, if the second power supply 2 fails, the system will switch back to the first power supply 1;

[0034] When the load has an excessive power demand, the control module can control the first power supply and the second power supply to be turned on simultaneously to supply power through the signal obtained by the load;

[0035] By introducing redundant power supply design (second power supply), the system eliminates the risk of single point failure. Even if a power supply fails, the system can still continue to supply power to the load, ensuring the high reliability of the system.

[0036] In some specific embodiments, the monitoring module 4 includes a current sensor 7 , which is connected in series between the load 6 and the relay 5 to monitor the current flowing out of the first power source 1 and the second power source 2 .

[0037] Specifically, the current sensor 7 is connected in series between the load 6 and the relay 5, which means that the current sensor 7 is directly located on the path through which the current flows. Regardless of whether the relay 5 selects the first power source 1 or the second power source 2 to supply power to the load, the current will pass through the current sensor 7, thereby ensuring that the current sensor 7 can monitor the current actually flowing through the load 6 in real time;

[0038] Since the current sensor 7 is directly located on the current path, it can accurately measure the current flowing through the load 6 without being interfered by other factors. The current sensor 7 can monitor the change of current in real time to ensure that the control module 3 can respond promptly to abnormal current conditions such as overload or short circuit.

[0039] In some specific embodiments, the monitoring module 4 includes a first voltage sensor 8 and a second voltage sensor 9 electrically connected to the control module 3, the first voltage sensor 8 is connected in parallel to the output end of the first power supply 1, and the second voltage sensor 9 is connected in parallel to the output end of the second power supply 2 to monitor the voltages at the output ends of the first power supply 1 and the second power supply 2.

[0040] Specifically, the first voltage sensor 8 is connected in parallel to the output end of the first power supply 1, and the specific connection method is as follows:

[0041] One end of the voltage sensor 8 is connected to the positive output terminal of the first power supply 1 .

[0042] The other end is connected to the negative electrode (or ground) of load 6 to form a complete voltage measurement loop; the advantages of this parallel connection are:

[0043] High-precision measurement: The voltage sensor 8 is directly connected across the output end of the power supply, and can accurately measure the output voltage change of the first power supply 1 without being interfered by other factors;

[0044] The voltage sensor 8 can monitor the voltage change of the first power supply 1 in real time to ensure that the control module 3 can respond to voltage abnormalities in a timely manner, such as voltage being too low or too high;

[0045] The second voltage sensor 9 is connected in parallel to the output end of the second power supply 2, and the specific connection method is as follows:

[0046] One end of the voltage sensor 9 is connected to the positive output end of the second power supply 2.

[0047] The other end is connected to the negative electrode (or ground) of load 6 to form a complete voltage measurement loop; the advantages of this parallel connection are:

[0048] High-precision measurement: The voltage sensor 9 is directly connected across the output end of the power supply, and can accurately measure the output voltage changes of the second power supply 2 without being interfered by other factors. The voltage sensor 9 can monitor the voltage changes of the second power supply 2 in real time to ensure that the control module 3 can respond to voltage abnormalities in a timely manner, such as voltage being too low or too high.

[0049] In some specific embodiments, a protection module is further included, and the protection module is electrically connected to the control module 3 .

[0050] In some specific embodiments, the protection module includes an overload protection unit 10, which is electrically connected between the relay 5 and the load 6 and is used to disconnect when the current between the relay 5 and the load 6 exceeds a preset threshold.

[0051] Specifically, the overload protection unit 10 is electrically connected between the relay 5 and the load 6. The specific connection method is as follows: one end of the overload protection unit 10 is connected to the output end of the relay 5 (i.e., the input end of the load 6), and the other end is connected to the positive input end of the load 6. When the current obtained by the current sensor is too large and exceeds the safety threshold, the overload protection unit can disconnect the power supply and cut off the connection between the power supply and the load to prevent overload from causing system damage.

[0052] In some specific embodiments, the protection module includes a short-circuit protection unit 11, which is electrically connected between the relay 5 and the load 6 and is used to disconnect when the current between the relay 5 and the load 6 exceeds a preset threshold. When the current obtained by the current sensor is too large and exceeds the safety threshold, the power supply can be disconnected through the short-circuit protection unit 11, cutting off the connection between the power supply and the load to prevent a short circuit from causing system damage.

[0053] In some specific embodiments, a first indicator light 12 and a second indicator light 13 electrically connected to the control module 3 are further included to display the power supply status of the first power source 1 and the second power source 2 .

[0054] Specifically, the first indicator light 12 and the second indicator light 13 are electrically connected to the control module 3, respectively, and are used to display the power supply status of the first power source 1 and the second power source 2. This design provides users with intuitive visual feedback, helping them to understand the working status of each power source in real time and ensure the normal operation of the system.

[0055] In some specific embodiments, an operation button 14 electrically connected to the control module 3 is also included.

[0056] Specifically, the user can manually switch the current power supply (for example, from the first power supply 1 to the second power supply 2, or vice versa) by operating the button 14. After the short-circuit protection unit 11 triggers the circuit-breaking action, the user can manually reset the short-circuit protection unit by operating the button 14 to restore the normal operation of the circuit.

[0057] In some specific embodiments, the negative electrode of the load 6, the negative electrode of the first power supply 1 and the negative electrode of the second power supply 2 are grounded.

[0058] In some specific embodiments, an analog multiplexer 15 is also included, which is electrically connected to the first voltage sensor 8, the control module 3 and the second voltage sensor 9 respectively, and is used to read the signals of the first voltage sensor 8 and the second voltage sensor 9 through a common digital-to-analog converter of the multi-channel voltage signals.

[0059] Specifically, the analog multiplexer 15 is used to read the voltage signals of the first voltage sensor 8 and the second voltage sensor 9 in turn, and transmit these signals to the control module 3 through a common digital-to-analog converter (ADC). By using the analog multiplexer 15, the system only needs one ADC channel to read the signals of multiple voltage sensors, reducing hardware costs and circuit complexity.

[0060] The above is only a specific implementation of the embodiment of the present invention, but the protection scope of the embodiment of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed in the embodiment of the present invention should be included in the protection scope of the embodiment of the present invention. Therefore, the protection scope of the embodiment of the present invention should be based on the protection scope of the claims.

Claims

1. A dual power supply system, characterized in that: It comprises a first power source (1), a second power source (2), a control module (3), a monitoring module (4) and a relay (5); The first power source (1) and the second power source (2) are electrically connected to a relay (5) respectively, and the relay (5) is electrically connected to a load (6); The monitoring module (4) is electrically connected to the first power source (1), the second power source (2) and the relay (5) respectively, and is used to obtain the current and voltage flowing out of the first power source (1) and the second power source (2); The control module (3) is electrically connected to the monitoring module (4) and the relay (5) respectively, and is used to obtain the current and voltage monitored by the monitoring module (4) to control the switching state of the relay (5).

2. A dual voltage system according to claim 1, characterized in that: The monitoring module (4) comprises a current sensor (7), wherein the current sensor (7) is connected in series between the load (6) and the relay (5) so as to monitor the current flowing out of the first power source (1) and the second power source (2).

3. A dual voltage system according to claim 1, characterized in that: The monitoring module (4) comprises a first voltage sensor (8) and a second voltage sensor (9) which are electrically connected to the control module (3); the first voltage sensor (8) is connected in parallel to the output end of the first power supply (1), and the second voltage sensor (9) is connected in parallel to the output end of the second power supply (2), so as to monitor the voltages at the output ends of the first power supply (1) and the second power supply (2).

4. A dual voltage system according to claim 1, characterized in that: It also includes a protection module, which is electrically connected to the control module (3).

5. A dual voltage system according to claim 4, characterized in that: The protection module comprises an overload protection unit (10), wherein the overload protection unit (10) is electrically connected between a relay (5) and a load (6) and is used to disconnect when the current between the relay (5) and the load (6) exceeds a preset threshold.

6. A dual voltage system according to claim 4, characterized in that: The protection module comprises a short-circuit protection unit (11), wherein the short-circuit protection unit (11) is electrically connected between a relay (5) and a load (6) and is used to disconnect when the current between the relay (5) and the load (6) exceeds a preset threshold.

7. A dual voltage system according to claim 1, characterized in that: It also includes a first indicator light (12) and a second indicator light (13) electrically connected to the control module (3) and used to display the power supply status of the first power source (1) and the second power source (2).

8. A dual voltage system according to claim 1, characterized in that: It also includes an operating button (14) electrically connected to the control module (3).

9. A dual voltage system according to claim 1, characterized in that: The negative electrode of the load (6), the first power source (1) and the negative electrode of the second power source (2) are grounded.

10. A dual voltage system according to claim 1, characterized in that: It also includes an analog multiplexer (15), which is electrically connected to the first voltage sensor (8), the control module (3) and the second voltage sensor (9) respectively, and is used to read the signals of the first voltage sensor (8) and the second voltage sensor (9) through a common digital-to-analog converter for the multi-channel voltage signals.

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