Energy management system with self-detection function and power supply device

Abstract

The utility model relates to a kind of energy management system and power supply equipment with self-detection function, belong to the technical field of power supply equipment.The system includes self-detection circuit, switching circuit, first control circuit and second control circuit;Wherein, the first end of the self-detection circuit is electrically connected with the first power supply end of the system, the second end of the self-detection circuit is electrically connected with the first end of the second control circuit, the third end of the self-detection circuit is electrically connected with the second power supply end of the system, the fourth end of the self-detection circuit is electrically connected with the second end of the second control circuit, the first end of the switching circuit is electrically connected with the third power supply of the system, the second end of the switching circuit is electrically connected with the load equipment of the system, the third end of the switching circuit is electrically connected with the first control circuit, the fifth end of the self-detection circuit is electrically connected with the first end of the first control circuit.

Description

Technical Field

[0001] This utility model relates to the technical field of power supply equipment, and more specifically, to an energy management system and power supply equipment with self-detection function. Background Technology

[0002] With the rapid development of energy management systems (EMS), these systems can perform real-time monitoring and intelligent control of various environmental processes related to energy production, distribution, and consumption. Currently, some load devices and internal control chips in EMS require constant current sources. Existing EMS typically input the constant current source directly to the load devices and then adjust the constant current source based on feedback from the load devices. However, if the output constant current is too high or too low, the conversion efficiency of the DC-DC conversion circuit for the load devices is low. Utility Model Content

[0003] Embodiments of this disclosure provide an energy management system and power supply device with self-detection function.

[0004] According to a first aspect of the present invention, an energy management system with self-detection function is provided, the system comprising a self-detection circuit, a switching circuit, a first control circuit, and a second control circuit;

[0005] The self-test circuit has the following components: a first terminal connected to the first power supply terminal of the system; a second terminal connected to the first terminal of the second control circuit; a third terminal connected to the second power supply terminal of the system; a fourth terminal connected to the second terminal of the second control circuit; a first terminal connected to the third power supply terminal of the system; a second terminal connected to the load device of the system; a third terminal connected to the first control circuit; and a fifth terminal connected to the first terminal of the first control circuit.

[0006] Optionally, the self-detection circuit includes two sampling circuits and a comparison circuit;

[0007] Wherein, the first end of the first sampling circuit in the sampling circuit is electrically connected to the first power supply end of the system, the first end of the second sampling circuit in the sampling circuit is electrically connected to the second power supply end of the system, the connection point of the second end of the first sampling circuit and the second end of the second sampling circuit is electrically connected to the first end of the comparison circuit, and the second end of the comparison circuit is electrically connected to the first end of the first control circuit.

[0008] Optionally, the sampling circuit includes a second switch, a fourth resistor, a fifth resistor, and a sixth resistor;

[0009] Wherein, the first end of the second switch is electrically connected to the first power supply end of the system, the second end of the second switch is electrically connected to the first end of the sixth resistor, the first end of the fourth resistor is electrically connected to the third end of the second switch, the connection end of the second end of the fifth resistor and the second end of the sixth resistor is electrically connected to the first end of the comparison circuit, and the connection point of the second end of the fourth resistor and the first end of the fifth resistor is electrically connected to the first end of the comparison circuit.

[0010] Optionally, the comparison circuit includes a first resistor, a second resistor, a third resistor, and a comparator;

[0011] Wherein, the first end of the first resistor is electrically connected to the reference end of the system, the connection point of the second end of the first resistor and the first end of the third resistor is electrically connected to the non-inverting input end of the comparator, the inverting input end of the comparator serves as the first end of the comparator, the output end of the comparator is electrically connected to the first end of the second resistor, and the connection point of the second end of the second resistor and the second end of the third resistor is electrically connected to the first control circuit.

[0012] Optionally, the system further includes a power supply circuit and a transformer, wherein the output terminal of the power supply circuit is electrically connected to the primary winding of the transformer, and the three secondary windings of the transformer serve as the first power supply terminal, the second power supply terminal, and the third power supply terminal of the system, respectively.

[0013] Optionally, the system further includes a first power supply circuit and a second power supply circuit;

[0014] The first power supply circuit includes a 21st capacitor, a 22nd capacitor, and a first transformer chip. The first transformer chip is connected between the first power supply terminal and the first sampling circuit of the system. The 21st capacitor is connected across the input terminal and the ground terminal of the first transformer chip, and the 22nd capacitor is connected across the output terminal and the ground terminal of the first transformer chip.

[0015] The second power supply circuit includes a 31st capacitor, a 32nd capacitor, and a second transformer chip. The second transformer chip is connected between the second power supply terminal and the second sampling circuit of the system. The 31st capacitor is connected across the input terminal and the ground terminal of the second transformer chip, and the 32nd capacitor is connected across the output terminal and the ground terminal of the second transformer chip.

[0016] Optionally, the system further includes a first diode, a second diode, and a third diode; the first diode is disposed between the switching circuit and the third power supply terminal, the second diode is disposed between the first power supply circuit and the first power supply terminal, and the third diode is disposed between the second power supply circuit and the second power supply terminal.

[0017] Optionally, the system further includes a switching circuit comprising a first switching transistor, a second switching transistor, a third switching transistor, and a fourth switching transistor. The gates of the first, second, third, and fourth switching transistors are all communicatively connected to the second control circuit. The connection point between the drains of the first and third switching transistors is electrically connected to the positive terminal of the load device. The connection point between the sources of the second and fourth switching transistors is electrically connected to the negative terminal of the load device. The connection point between the sources of the first and second switching transistors is electrically connected to the second terminal of the switching circuit. The connection point between the sources of the third and fourth switching transistors is electrically connected to the negative terminal of the first power supply.

[0018] According to a second aspect of the present invention, a power supply device is provided, the device including an energy management device, the energy management device including an energy management system with self-detection function as described in the first invention.

[0019] Optionally, the device further includes an AC power supply, and the input terminal of the power supply circuit of the energy management system is electrically connected to the AC power supply.

[0020] One technical advantage of this invention is that the self-detection circuit in the energy management system with self-detection function provided by this invention can determine the stability of the DC power input to the second control circuit by connecting to the first power supply terminal and the second power supply terminal of the system. When the stability of the DC power meets the requirements, the first control circuit controls the switching circuit to conduct, and the second control circuit controls the conversion efficiency of the conversion circuit to supply power to the load equipment, thereby effectively improving the conversion efficiency of the conversion circuit.

[0021] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0022] The accompanying drawings, which form part of this specification, illustrate embodiments of the present invention and, together with the specification, serve to explain the principles of the present invention.

[0023] Figure 1 This is a structural block diagram of an energy management system and power supply equipment with self-detection function according to one embodiment;

[0024] Figure 2 This is a circuit diagram of an energy management system and power supply device with self-detection function according to one embodiment;

[0025] Figure 3 This is a circuit diagram of a sampling circuit according to one embodiment;

[0026] Figure 4 This is a circuit diagram of a comparison circuit according to one embodiment;

[0027] Figure 5 This is a circuit diagram of a conversion circuit according to one embodiment. Detailed Implementation

[0028] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0029] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0030] Technologies and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such technologies and equipment should be considered part of the specification.

[0031] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0033] See Figure 1 As shown, an energy management system with self-detection function according to an embodiment of the present disclosure will be described.

[0034] The energy management system with self-detection function in this embodiment includes a self-detection circuit 50, a switching circuit K1, a first control circuit 20, and a second control circuit 60.

[0035] Specifically, the first terminal of the self-detection circuit 50 is electrically connected to the first power supply terminal of the system, the second terminal of the self-detection circuit 50 is electrically connected to the first terminal (VCC1 terminal) of the second control circuit 60, the third terminal of the self-detection circuit 50 is electrically connected to the second power supply terminal of the system, the fourth terminal of the self-detection circuit 50 is electrically connected to the second terminal (VCC2 terminal) of the second control circuit 60, the first terminal of the switch circuit K1 is electrically connected to the third power supply terminal of the system, the second terminal of the switch circuit K1 is electrically connected to the load device 40 of the system, the third terminal of the switch circuit K1 is electrically connected to the first control circuit 20, and the fifth terminal of the self-detection circuit 50 is electrically connected to the first terminal of the first control circuit 20.

[0036] In this embodiment, the self-detection circuit 50 can determine the stability of the DC power input to the second control circuit 60 by connecting to the first power supply terminal and the second power supply terminal of the system. When the stability of the DC power meets the requirements, the first control circuit 20 controls the switch circuit K1 to conduct, and the second control circuit 60 controls the conversion efficiency of the conversion circuit 30 to supply power to the load device 40, effectively improving the conversion efficiency of the conversion circuit 30.

[0037] In some embodiments, since the second control circuit 60 requires DC sources with different voltage values, the stability of the constant current source can be determined by comparing the voltage difference between the two different DC sources, such as... Figure 2 As shown, the self-detection circuit 50 includes two sampling circuits and a comparison circuit;

[0038] In this circuit, the first terminal of the first sampling circuit U21 is electrically connected to the first power supply terminal of the system, the first terminal of the second sampling circuit U22 is electrically connected to the second power supply terminal of the system, the connection point between the second terminal of the first sampling circuit U21 and the second terminal of the second sampling circuit U22 is electrically connected to the first terminal of the comparison circuit, and the second terminal of the comparison circuit is electrically connected to the first terminal of the first control circuit 20.

[0039] In some embodiments, such as Figure 3 As shown, the sampling circuit includes a second switch K2, a fourth resistor R4, a fifth resistor R5, and a sixth resistor R6. The second switch K2 is controlled by the first control circuit 20, that is, the communication terminal of the second switch K2 is connected to the first control circuit 20, so that the first terminal and the second terminal of the second switch K2 can be connected under the control of the first control circuit 20, or the first terminal and the third terminal of the second switch K2 can be connected.

[0040] Specifically, the first end of the second switch K2 is electrically connected to the first power supply end of the system, the second end of the second switch K2 is electrically connected to the first end of the sixth resistor R6, the first end of the fourth resistor R4 is electrically connected to the third end of the second switch K2, the connection point between the second end of the fifth resistor R5 and the second end of the sixth resistor R6 is electrically connected to the first end of the comparator circuit, and the connection point between the second end of the fourth resistor R4 and the first end of the fifth resistor R5 is electrically connected to the first end of the comparator circuit.

[0041] In this embodiment, the first control circuit 20 controls the first and third terminals of the second switch K2 of the first sampling circuit U21 to connect, and controls the first and third terminals of the second switch K2 of the second sampling circuit U22 to connect, so that the voltage difference between the terminal voltages of the fourth resistor R4 and the fifth resistor R5 of the first sampling circuit U21 and the terminal voltages of the fourth resistor R4 and the fifth resistor R5 of the second sampling circuit U22 can be used as the input voltage (Vin) to be input to the comparator. When the voltage difference is within a set value range, the level output by the comparator enables the first control circuit 20 to control the first and second terminals of the switch circuit K1 to connect, thereby realizing the constant current source output to the load device 40 through the conversion circuit 30. When the voltage difference exceeds the set value range, the level output by the comparator enables the first control circuit 20 to control the first and second terminals of the switch circuit K1 to disconnect. The switch circuit K1 here can be any existing controllable switching device, which will not be specifically described here.

[0042] In some embodiments, such as Figure 4 As shown, the comparator circuit includes a first resistor R1, a second resistor R2, a third resistor R3, and a comparator.

[0043] Wherein, the first end of the first resistor R1 is electrically connected to the reference end of the system, the connection point of the second end of the first resistor R1 and the first end of the third resistor R3 is electrically connected to the non-inverting input end of the comparator, the inverting input end of the comparator serves as the first end of the comparator, the output end of the comparator is electrically connected to the first end of the second resistor R2, and the connection point of the second end of the second resistor R2 and the second end of the third resistor R3 is electrically connected to the first control circuit 20.

[0044] In this embodiment, by setting the comparison circuit, different output levels can be achieved to control whether the first terminal and the second terminal of the switch circuit K1 are connected.

[0045] In some embodiments, the system further includes a power supply circuit 10 and a transformer T1. The output terminal of the power supply circuit 10 is electrically connected to the primary winding of the transformer T1, and the three secondary windings of the transformer T1 serve as the first power supply terminal, the second power supply terminal, and the third power supply terminal of the system, respectively.

[0046] In this embodiment, by setting up transformer T1, the isolation function is achieved, which can effectively improve the safety of internal components such as load device 40, conversion circuit 30, and second control circuit 60.

[0047] In some embodiments, the system further includes a first power supply circuit and a second power supply circuit;

[0048] The first power supply circuit includes a twenty-first capacitor C21, a twenty-second capacitor C22, and a first transformer chip. The first transformer chip is connected between the first power supply terminal of the system and the first sampling circuit U21. The twenty-first capacitor C21 is connected across the input terminal and the ground terminal of the first transformer chip, and the twenty-second capacitor C22 is connected across the output terminal and the ground terminal of the first transformer chip.

[0049] The second power supply circuit includes a 31st capacitor C31, a 32nd capacitor C32, and a second transformer chip. The second transformer chip is connected between the second power supply terminal and the second sampling circuit U22 of the system. The 31st capacitor C31 is connected across the input terminal and the ground terminal of the second transformer chip, and the 32nd capacitor C32 is connected across the output terminal and the ground terminal of the second transformer chip.

[0050] In this embodiment, the first transformer chip can be a step-down chip so that the DC voltage output by the first transformer chip can be 10V, and the second transformer chip can also be a step-down chip so that the DC voltage output by the second transformer chip can be 5V.

[0051] In this embodiment, by setting the twenty-first capacitor C21, the twenty-second capacitor C22, the thirty-first capacitor C31, and the thirty-second capacitor C32, the stability of the input and output of the first transformer chip and the second transformer chip can be improved.

[0052] In some embodiments, the system further includes a first diode D1, a second diode D2, and a third diode D3; the first diode D1 is disposed between the switching circuit K1 and the third power supply terminal, the second diode D2 is disposed between the first power supply circuit and the first power supply terminal, and the third diode D3 is disposed between the second power supply circuit and the second power supply terminal.

[0053] In this embodiment, the first diode D1, the second diode D2, and the third diode D3 are reverse protection diodes, which can effectively protect sensitive devices such as capacitors from being burned out by reverse voltage or current.

[0054] In some embodiments, the system further includes a switching circuit 30, which includes a first switching transistor Q1, a second switching transistor Q2, a third switching transistor Q3, and a fourth switching transistor Q4. The gates of the first switching transistor Q1, the second switching transistor Q2, the third switching transistor Q3, and the fourth switching transistor Q4 are all communicatively connected to the second control circuit 60. The connection point between the drain of the first switching transistor Q1 and the drain of the third switching transistor Q3 is electrically connected to the positive terminal of the load device 40. The connection point between the source of the second switching transistor Q2 and the source of the fourth switching transistor Q4 is electrically connected to the negative terminal of the load device 40. The connection point between the source of the first switching transistor Q1 and the drain of the second switching transistor Q2 is electrically connected to the second terminal of the switching circuit K1. The connection point between the source of the third switching transistor Q3 and the drain of the fourth switching transistor Q4 is electrically connected to the negative terminal of the first power supply.

[0055] In this embodiment, the first switch Q1 and the fourth switch Q4 form one group, and the second switch Q2 and the third switch Q3 form another group. The two groups of switches are controlled by the second control circuit 60 to conduct alternately, so as to output DC power to the load device 40 in accordance with the requirements.

[0056] The power supply device according to an embodiment of this disclosure includes:

[0057] An energy management device, comprising an energy management system with self-detection function as described in any of the above embodiments.

[0058] In some embodiments, the device further includes an AC power supply, and the input terminal of the power supply circuit 10 of the energy management system is electrically connected to the AC power supply.

[0059] In this embodiment, the AC power supply can be any voltage value, and no limitation is made here.

[0060] While specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. An energy management system with self-detection function, characterized in that, The system includes a self-detection circuit, a switching circuit, a first control circuit, and a second control circuit. The self-test circuit has the following components: a first terminal connected to the first power supply terminal of the system; a second terminal connected to the first terminal of the second control circuit; a third terminal connected to the second power supply terminal of the system; a fourth terminal connected to the second terminal of the second control circuit; a first terminal connected to the third power supply terminal of the system; a second terminal connected to the load device of the system; a third terminal connected to the first control circuit; and a fifth terminal connected to the first terminal of the first control circuit.

2. The system according to claim 1, characterized in that, The self-detection circuit includes two sampling circuits and a comparison circuit; Wherein, the first end of the first sampling circuit in the sampling circuit is electrically connected to the first power supply end of the system, the first end of the second sampling circuit in the sampling circuit is electrically connected to the second power supply end of the system, the connection point of the second end of the first sampling circuit and the second end of the second sampling circuit is electrically connected to the first end of the comparison circuit, and the second end of the comparison circuit is electrically connected to the first end of the first control circuit.

3. The system according to claim 2, characterized in that, The sampling circuit includes a second switch, a fourth resistor, a fifth resistor, and a sixth resistor; Wherein, the first end of the second switch is electrically connected to the first power supply end of the system, the second end of the second switch is electrically connected to the first end of the sixth resistor, the first end of the fourth resistor is electrically connected to the third end of the second switch, the connection end of the second end of the fifth resistor and the second end of the sixth resistor is electrically connected to the first end of the comparison circuit, and the connection point of the second end of the fourth resistor and the first end of the fifth resistor is electrically connected to the first end of the comparison circuit.

4. The system according to claim 2, characterized in that, The comparison circuit includes a first resistor, a second resistor, a third resistor, and a comparator; Wherein, the first end of the first resistor is electrically connected to the reference end of the system, the connection point of the second end of the first resistor and the first end of the third resistor is electrically connected to the non-inverting input end of the comparator, the inverting input end of the comparator serves as the first end of the comparator, the output end of the comparator is electrically connected to the first end of the second resistor, and the connection point of the second end of the second resistor and the second end of the third resistor is electrically connected to the first control circuit.

5. The system according to claim 2, characterized in that, The system also includes a power supply circuit and a transformer. The output terminal of the power supply circuit is electrically connected to the primary winding of the transformer. The three secondary windings of the transformer serve as the first power supply terminal, the second power supply terminal, and the third power supply terminal of the system, respectively.

6. The system according to claim 5, characterized in that, The system also includes a first power supply circuit and a second power supply circuit. The first power supply circuit includes a 21st capacitor, a 22nd capacitor, and a first transformer chip. The first transformer chip is connected between the first power supply terminal and the first sampling circuit of the system. The 21st capacitor is connected across the input terminal and the ground terminal of the first transformer chip, and the 22nd capacitor is connected across the output terminal and the ground terminal of the first transformer chip. The second power supply circuit includes a 31st capacitor, a 32nd capacitor, and a second transformer chip. The second transformer chip is connected between the second power supply terminal and the second sampling circuit of the system. The 31st capacitor is connected across the input terminal and the ground terminal of the second transformer chip, and the 32nd capacitor is connected across the output terminal and the ground terminal of the second transformer chip.

7. The system according to claim 6, characterized in that, The system further includes a first diode, a second diode, and a third diode; the first diode is disposed between the switching circuit and the third power supply terminal, the second diode is disposed between the first power supply circuit and the first power supply terminal, and the third diode is disposed between the second power supply circuit and the second power supply terminal.

8. The system according to claim 1, characterized in that, The system further includes a switching circuit comprising a first switching transistor, a second switching transistor, a third switching transistor, and a fourth switching transistor. The gates of the first, second, third, and fourth switching transistors are all communicatively connected to the second control circuit. The connection point between the drains of the first and third switching transistors is electrically connected to the positive terminal of the load device. The connection point between the sources of the second and fourth switching transistors is electrically connected to the negative terminal of the load device. The connection point between the sources of the first and second switching transistors is electrically connected to the second terminal of the switching circuit. The connection point between the sources of the third and fourth switching transistors is electrically connected to the negative terminal of the first power supply.

9. A power supply device, characterized in that, The device includes: An energy management device, comprising an energy management system with self-detection function as described in any one of claims 1 to 8.

10. The power supply equipment according to claim 9, characterized in that, The device also includes an AC power supply, and the input terminal of the power supply circuit of the energy management system is electrically connected to the AC power supply.

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