Power supply circuit, energy storage power supply and energy storage power supply system

Abstract

The utility model provides a power supply circuit, an energy storage power supply and an energy storage power supply system. The power supply circuit comprises a power supply port, a switching circuit, a second power supply port, a signal trigger circuit and a control circuit, the power supply port is used for externally connecting a load; the switching circuit is used for connecting a first power supply and the power supply port; the second power port is used for connecting a second power supply; the signal trigger circuit is used for outputting a detection signal according to the electric signal of the second power port; and the control circuit is used for controlling the working state of the switching circuit according to the detection signal so as to control the power supply state of the first power supply to the load. According to the application, the power supply for supplying power to the external load can be automatically switched, and instant large current is avoided in the power supply switching process, so that the circuit and the load are prevented from being damaged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power supply, in particular to a power supply circuit, an energy storage power supply and an energy storage power supply system. BACKGROUND

[0002] Most of the energy storage power supplies on the market are equipped with multiple batteries to increase the endurance. However, in the process of supplying power to the load by multiple batteries, when one battery is used up, the corresponding battery output port needs to be manually turned on after another battery is powered on, which is relatively cumbersome and cannot automatically switch the batteries. In some other solutions, when one battery is used up, the other battery directly supplies power, and then the empty battery is powered off without manually turning on the output port. However, when the other battery supplies power, the empty battery is charged, resulting in the occurrence of instantaneous large current, which damages the power supply switch device and the battery. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a power supply circuit, an energy storage power supply and an energy storage power supply system, which aims to automatically switch multiple batteries in the energy storage power supply and avoid the occurrence of instantaneous large current during battery switching.

[0004] In a first aspect, the present application provides a power supply circuit, comprising:

[0005] A power supply port for externally connecting a load;

[0006] A switch circuit for connecting a first power supply and the power supply port;

[0007] A second power supply port for connecting a second power supply;

[0008] A signal trigger circuit for outputting a detection signal according to an electrical signal of the second power supply port;

[0009] A control circuit for controlling the working state of the switch circuit according to the detection signal to control the power supply state of the first power supply to the load.

[0010] In an embodiment, the signal trigger circuit is configured to detect whether the voltage of the second power supply port is greater than a preset voltage threshold and output a detection signal.

[0011] In an embodiment, when the voltage of the second power supply port is less than the preset voltage threshold, the control circuit is configured to control the switch circuit to be turned on according to the detection signal to allow the first power supply to supply power to the load.

[0012] In an embodiment, when the voltage of the second power port is greater than or equal to a preset voltage threshold, the control circuit is configured to control the switch circuit to be turned off according to the detection signal, so as to prevent the first power supply from supplying power to the load.

[0013] In an embodiment, the signal trigger circuit comprises a voltage comparison circuit and a third power supply circuit.

[0014] The first input terminal of the voltage comparison circuit is connected to the third power supply circuit, the second input terminal of the voltage comparison circuit is connected to the second power port, and the output terminal of the voltage comparison circuit is connected to the control circuit.

[0015] The voltage comparison circuit is configured to compare the electrical signals of the third power supply circuit and the second power port, and output the detection signal.

[0016] In an embodiment, the switch circuit comprises a switch driving component and a switch component.

[0017] The first end of the switch component is connected to the first power supply, and the second end of the switch component is connected to the power supply port.

[0018] The switch driving component is configured to control the conduction state of the switch component according to the control signal output by the control circuit, so as to control the power supply state of the first power supply to the load.

[0019] In an embodiment, when the voltage of the second power port is less than a preset voltage threshold, the switch driving component is configured to control the switch component to be turned on according to the turn-on signal output by the control circuit, so as to enable the first power supply to supply power to the load through the turned-on switch component.

[0020] When the voltage of the second power port is greater than or equal to a preset voltage threshold, the switch driving component is configured to control the switch component to be turned off according to the turn-off signal output by the control circuit, so as to prevent the first power supply from supplying power to the load.

[0021] In an embodiment, the switch driving component comprises a triode or a MOS tube, and / or the switch component comprises a triode or a MOS tube.

[0022] In an embodiment, the control circuit further comprises a communication port configured to be communicatively connected to the second power supply.

[0023] In an embodiment, the control circuit is further configured to receive a state signal of the second power supply through the communication port, so as to control the working state of the switch circuit.

[0024] In an embodiment, the control circuit is further configured to output a power control signal through the communication port to control the second power supply to control the power supply state of the load.

[0025] In an embodiment, when the normal state signal of the second power supply is received, the control circuit is configured to control the working state of the switching circuit according to the control signal output by the signal trigger circuit.

[0026] When the abnormal state signal is received or the state signal is not received, the control circuit controls the switching circuit to be turned on.

[0027] In an embodiment, the power supply circuit further comprises a first power supply, the first power supply is connected to the switching circuit, and the second power supply is an external power supply.

[0028] In a second aspect, the present application provides a power supply, which comprises a housing and a power supply circuit as provided in the first aspect, and the power supply circuit is at least partially arranged in the housing.

[0029] In a third aspect, the present application provides a power supply system, which comprises a power supply as provided in the second aspect and a second power supply, and the second power supply is connected to the power supply.

[0030] The power supply circuit provided by the present application comprises a power supply port, a switching circuit, a second power supply port, a signal trigger circuit, and a control circuit, wherein the power supply port is configured to be externally connected to a load, the switching circuit is connected to a first power supply and the power supply port, the second power supply port is connected to a second power supply, the signal trigger circuit outputs a detection signal according to an electrical signal of the second power supply port, and the control circuit controls the working state of the switching circuit according to the detection signal output by the signal trigger circuit, thereby controlling the power supply state of the first power supply to the load. The power supply circuit of the present application can be applied to a power supply, and through detection of the electrical signal of the second power supply port, the power supply state of the first power supply to the load can be controlled according to the detection signal corresponding to the port, thereby realizing automatic switching of multiple power supplies in the power supply and avoiding large instantaneous current during switching of the power supply. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0032] Figure 1 The structural schematic diagram of the power supply circuit provided by an embodiment of the present application;

[0033] Figure 2A schematic diagram of a power supply circuit provided in an embodiment of this application;

[0034] Figure 3 This is a schematic diagram of the power supply circuit provided in another embodiment of this application;

[0035] Figure 4 This is a schematic diagram of the power supply circuit provided in another embodiment of this application;

[0036] Figure 5 This is a schematic diagram of the structure of an energy storage power supply provided in an embodiment of this application;

[0037] Figure 6 This is a schematic diagram of the structure of an energy storage power system provided in an embodiment of this application. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0040] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the power supply circuit 100 provided in an embodiment of this application.

[0041] like Figure 1 As shown, the power supply circuit 100 includes a power supply port 10, a switching circuit 20, a second power supply port 30, a signal triggering circuit 40, and a control circuit 50. The power supply port 10 is used to connect an external load. The switching circuit 20 connects to the power supply port 10 and is used to connect to a first power source. The second power supply port 30 is used to connect to a second power source. The signal triggering circuit 40 outputs a detection signal based on the electrical signal from the second power supply port 30. The control circuit 50 controls the operating state of the switching circuit 20 based on the received detection signal, thereby controlling the power supply state of the first power source to the load.

[0042] Specifically, the power supply port 10 is connected with the switch circuit 20, and the switch circuit 20 is also used for connecting the first power supply; the power supply port 10 is also connected with the second power supply port 30, so that the first power supply and the second power supply can supply power to the external load through the power supply port 10; the signal triggering circuit 40 is connected with the second power supply port 30 to detect the electrical signal of the second power supply port 30; and the control circuit 50 is connected with the signal triggering circuit 40 and the switch circuit 20 to receive the electrical signal sent by the signal triggering circuit 40 and control the working state of the switch circuit 20 according to the electrical signal.

[0043] Specifically, the second power supply port 30 is used for connecting the second power supply, and after the second power supply is connected with the power supply circuit 100, the second power supply can also supply power to the external load through the power supply port 10. The signal triggering circuit 40 outputs a corresponding detection signal to the control circuit 50 according to the electrical signal detected by the second power supply port 30, so that the control circuit 50 can determine the state of the second power supply according to the received detection signal and control the working state of the switch circuit 20 according to the detection signal to control the power supply state of the first power supply to the load, so as to achieve the purpose of controlling the power supply state of the first power supply to the load according to the state of the second power supply, thereby avoiding manual switching during the process of switching the power supply to the load, and also determining whether to start the first power supply after determining whether the second power supply enters the power-off state. Since the first power supply cannot charge the second power supply after the second power supply enters the power-off state, controlling the working state of the switch circuit 20 by the detection signal to control the power supply state of the first power supply to the load can avoid the instantaneous large current caused by charging the empty power supply by the switched power supply, thereby avoiding damage to the power supply circuit 100, the power supply and the load caused by the instantaneous large current.

[0044] In the specific implementation process, the first power supply and the second power supply are both battery packs, and the battery type in the battery pack corresponding to the first power supply is the same as the battery type in the battery pack corresponding to the second power supply, and the number of batteries in series in the battery pack corresponding to the first power supply is also the same as the number of batteries in series in the battery pack corresponding to the second power supply, so that the same power supply effect can be achieved during the process of switching the power supply to supply power to the load. Specifically, the battery pack is a battery pack composed of 16 iron lithium batteries in series.

[0045] In an embodiment, the signal triggering circuit 40 is used for detecting whether the voltage of the second power supply port 30 is greater than a preset voltage threshold, and outputting a detection signal.

[0046] For example, the signal trigger circuit 40 is configured to detect whether the voltage of the second power port 30 is greater than a preset voltage threshold, so as to determine whether the second power has voltage output, and thus the detection signal generated according to the detection result can be used to indicate that the second power is in an output state or a power-off state, and thus the control circuit 50 can control the working state of the switch circuit 20 according to the working state of the second power, so as to control the power supply state of the first power to the load.

[0047] In an embodiment, when the voltage of the second power port 30 is less than the preset voltage threshold, the control circuit 50 is configured to control the switch circuit 20 to be turned on according to the detection signal, so as to allow the first power to supply power to the load.

[0048] For example, when the voltage of the second power port 30 is less than the preset voltage threshold, it can be determined that the second power has no voltage output, and thus the control circuit 50 controls the switch circuit 20 to be turned on, so as to enable the first power to supply power to the load.

[0049] In an embodiment, when the voltage of the second power port 30 is greater than or equal to the preset voltage threshold, the control circuit 50 is configured to control the switch circuit 20 to be turned off according to the detection signal, so as to prevent the first power from supplying power to the load.

[0050] For example, when the voltage of the second power port 30 is greater than or equal to the preset voltage threshold, it can be determined that the second power has voltage output, and thus the control circuit 50 controls the switch circuit 20 to be turned off, so as to prevent the first power from supplying power to the load, thereby avoiding damage to the power supply circuit 100 or the load caused by excessively large power supply voltage.

[0051] Please refer to Figure 2 , Figure 2 a schematic diagram of the power supply circuit 100 provided in an embodiment of the present application.

[0052] In an embodiment, the signal trigger circuit 40 comprises a voltage comparison circuit and a third power circuit; a first input end of the voltage comparison circuit is connected to the third power circuit, a second input end of the voltage comparison circuit is connected to the second power port 30, and an output end of the voltage comparison circuit is connected to the control circuit 50; the voltage comparison circuit is configured to compare the electrical signals of the third power circuit and the second power port 30, and output the detection signal.

[0053] For example, the signal trigger circuit 40 comprises a voltage comparison circuit and a third power circuit Figure 2The third power supply circuit is connected to the first input end of the voltage comparison circuit, the second input end of the voltage comparison circuit is connected to the second power supply port 30, and the output end of the voltage comparison circuit is connected to the control circuit 50. The voltage comparison circuit is used to compare the sizes of the electrical signal of the third power supply circuit and the electrical signal of the second power supply port 30, and output a corresponding detection signal. It should be understood that the electrical signal of the second power supply port 30 is the voltage of the second power supply port 30, and the electrical signal of the third power supply circuit is the voltage of the third power supply. The voltage of the third power supply is used as a preset voltage threshold, so as to realize the comparison between the voltage of the second power supply port 30 and the preset voltage threshold, and output a corresponding detection signal according to the comparison result.

[0054] In the specific implementation process, the voltage comparison circuit includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a voltage comparator U1, a fifth resistor R5, a diode D1, and a sixth resistor R6. One end of the first resistor R1 is used to connect the third power supply circuit, the other end of the first resistor R1 is connected to the first end of the second resistor R2, the second end of the second resistor R2 is grounded, and the first end of the second resistor R2 is also connected to the positive input end of the voltage comparator U1. One end of the third resistor R3 is connected to the second power supply port 30, the other end of the third resistor R3 is connected to the first end of the fourth resistor R4, the second end of the fourth resistor R4 is grounded, and the first end of the fourth resistor R4 is also connected to the negative input end of the voltage comparator U1. The output end of the voltage comparator U1 is connected to the negative electrode of the diode D1 through the fifth resistor R5, the positive electrode of the diode D1 is connected to the third power supply circuit through the sixth resistor R6, the positive electrode of the diode D1 is also used as a signal detection end, and is connected to the control circuit 50.

[0055] It should be understood that the voltage provided by the third power supply circuit is a stable voltage of 5V, and after being divided by the first resistor R1 and the second resistor R2, the voltage provided to the positive input terminal of the voltage comparator U1 is 1.02V, and at this time the corresponding preset voltage threshold of the second power supply port 30 is 44.37V; that is, when the voltage of the second power supply port 30 is greater than 44.37V, after being divided by the third resistor R3 and the fourth resistor R4, the voltage provided to the negative input terminal of the voltage comparator U1 is greater than 1.02V, at this time the low-level signal is output at the output terminal of the voltage comparator U1, so that the signal detection end is in a low-level state, and the control circuit 50 can receive a low-level detection signal; and when the voltage of the second power supply port 30 is less than 44.37V, after being divided by the third resistor R3 and the fourth resistor R4, the voltage provided to the negative input terminal of the voltage comparator U1 is less than 1.02V, at this time the high-level signal is output at the output terminal of the voltage comparator U1, so that the signal detection end is in a high-level state, and the control circuit 50 can receive a high-level detection signal, so that the control signal can determine the working state of the second power supply according to the received detection signal, and then control the switching circuit 20 to control the power supply state of the first power supply.

[0056] It should be noted that the 5V voltage provided by the third power supply circuit, the 1.02V voltage applied to the positive input terminal of the voltage comparator U1 after being divided, and the corresponding preset voltage threshold of the second power supply port 30 are all exemplary explanations adapted to the battery pack composed of 16 series-connected iron lithium batteries, and do not limit the specific numbers of the voltage provided by the third power supply circuit, the voltage applied to the positive input terminal of the voltage comparator U1 after being divided, and the corresponding preset voltage threshold of the second power supply port 30 in the present application.

[0057] Please refer to Figure 3 , Figure 3 The structural schematic diagram of the power supply circuit 100 provided by another embodiment of the present application.

[0058] In an embodiment, the switching circuit 20 includes a switch driving assembly 21 and a switch assembly 22; the first end of the switch assembly 22 is connected to the first power supply, and the second end of the switch assembly 22 is connected to the power supply port 10; the switch driving assembly 21 is used to control the conduction of the switch assembly 22 according to the control signal output by the control circuit 50, so as to control the power supply state of the first power supply to the load.

[0059] The switch circuit 20 is composed of a switch driving component 21 and a switch component 22. The first end of the switch component 22 is connected to the first power supply, and the second end of the switch component 22 is connected to the power supply port 10. The switch driving component 21 is used to control the switch component 22 to be turned on or turned off according to the control signal output by the control circuit 50, so as to allow the first power supply to supply power to the load or prevent the first power supply from supplying power to the load, thereby realizing the control of the power supply state of the first power supply to the load.

[0060] In an embodiment, the switch driving component 21 comprises a triode Q1 or a MOS tube, and / or the switch component 22 comprises a triode or a MOS tube.

[0061] In a specific implementation process, the switch driving component 21 and the switch component 22 can realize the corresponding circuit switching function by using a switch tube. The switch tube includes but is not limited to a triode Q1 and a MOS tube.

[0062] In an embodiment, when the voltage of the second power supply port 30 is less than a preset voltage threshold, the switch driving component 21 is used to control the switch component 22 to be turned on according to the turn-on signal output by the control circuit 50, so as to make the first power supply supply power to the load through the turned-on switch component 22.

[0063] For example, when the voltage of the second power supply port 30 is less than the preset voltage threshold, it can be determined that the second power supply is in a power-off state. When the switch driving component 21 receives the turn-on signal output by the control circuit 50, the switch component 22 is turned on, so that the first power supply can supply power to the load through the turned-on switch component 22, realizing the switching of the power supply and avoiding the occurrence of instantaneous large current.

[0064] In another embodiment, when the voltage of the second power supply port 30 is greater than or equal to the preset voltage threshold, the switch driving component 21 is used to control the switch component 22 to be turned off according to the turn-off signal output by the control circuit 50, so as to prevent the first power supply from supplying power to the load.

[0065] For example, when the voltage of the second power supply port 30 is greater than or equal to the preset voltage threshold, it can be determined that the second power supply is in a power supply state to the load. When the switch driving component 21 receives the turn-off signal output by the control circuit 50, the switch component 22 is turned off, so as to prevent the first power supply from supplying power to the load.

[0066] Please refer to Figure 4 , Figure 4 The structural schematic diagram of the power supply circuit 100 provided by another embodiment of the application is shown.

[0067] The switch driving assembly 21 comprises a triode Q1 and a seventh resistor R7, and the switch assembly 22 comprises a first MOS tube Q2, an eighth resistor R8 and a second MOS tube Q3. The base of the triode Q1 is connected to the control circuit 50, the emitter of the triode Q1 is grounded, the collector of the triode Q1 is connected to the first end of the seventh resistor R7, the second end of the seventh resistor R7 is connected to the gate of the first MOS tube Q2, the second end of the seventh resistor R7 is also connected to the gate of the second MOS tube Q3, and the second end of the seventh resistor R7 is also connected to the first end of the eighth resistor R8; the drain of the first MOS tube Q2 is connected to the first power supply, the source of the first MOS tube Q2 is connected to the second end of the eighth resistor R8, the second end of the eighth resistor R8 is also connected to the source of the second MOS tube Q3, and the drain of the second MOS tube Q3 is connected to the power supply port 10. The triode Q1 and the MOS tube are arranged to realize the working states described above.

[0068] In the specific implementation process, when the control circuit 50 receives a high-level detection signal, a high-level signal is output to the triode Q1, so that the first MOS tube Q2 and the second MOS tube Q3 are turned on, thereby enabling the first power supply to supply power to the load through the turned-on first MOS tube Q2 and the second MOS tube Q3; and when the control circuit 50 receives a low-level detection signal, a low-level signal is output to the triode Q1, thereby turning off the first MOS tube Q2 and the second MOS tube Q3 to prevent the first power supply from supplying power to the load.

[0069] It should be noted that the signal trigger circuit 40 is realized by the voltage comparator U1, and the switch circuit 20 is realized by the switch tube, which can complete the detection and transmission of the signal to the control circuit 50 in a very short time, and the switch circuit 20 can also respond in a very short time after the control circuit 50 outputs the control signal, thereby enabling the first power supply to supply power to the load quickly after the second power supply is powered off, ensuring the power supply of the load, without the need to supply power to the first power supply to ensure the power supply of the load under the condition that the second power supply is not powered off, thereby avoiding the charging problem of the power supply that completes the power supply, thereby reducing the risk of damage to the circuit and the power supply caused by the occurrence of instantaneous large current.

[0070] In an embodiment, the control circuit 50 further comprises a communication port for communication connection with the second power supply.

[0071] For example, the control circuit 50 is also provided with a communication port to realize communication connection with the second power supply, thereby determining the working state of the second power supply.

[0072] In an embodiment, the control circuit 50 is also used to output a power supply control signal through the communication port to control the power supply state of the second power supply to the load.

[0073] For example, the control circuit 50 can output a corresponding power control signal through the communication port to control the power supply state of the second power supply to the load. In a specific implementation process, the second power supply can be an independent power supply, that is, the power supply circuit 100 where the control circuit 50 is located is in a different device from the second power supply. After the second power supply is connected to the power supply circuit 100, the control circuit 50 in the power supply circuit 100 outputs a power control signal to the device where the second power supply is located through the communication port, so that the second power supply can supply power to the load connected to the power supply circuit 100, thereby realizing the control of the second power supply through the communication port.

[0074] In an embodiment, the control circuit 50 is further configured to receive a state signal of the second power supply through the communication port to control the working state of the switching circuit 20.

[0075] For example, the state signal of the second power supply includes but is not limited to an abnormal signal, a normal signal, an access signal, a working signal, etc., to control the working state of the switching circuit 20, thereby controlling the power supply state of the first power supply to the load.

[0076] In an embodiment, in the case that the normal state signal of the second power supply is received, the control circuit 50 is configured to control the working state of the switching circuit 20 according to the control signal output by the signal trigger circuit 40.

[0077] In a specific implementation process, after the second power supply is connected to the power supply circuit 100 through the second power supply port 30, if the state signal of the second power supply received by the control circuit 50 through the communication port is a normal state signal, the control circuit 50 controls the switching circuit 20 to be turned on or turned off according to the detection signal output by the signal trigger circuit 40. It should be understood that when the state signal of the second power supply is a normal state signal and the voltage of the second power supply detected at the second power supply port 30 is greater than or equal to a preset voltage threshold, it is determined that the second power supply normally supplies power to the load, thereby controlling the switching circuit 20 to be turned off to prevent the first power supply from supplying power to the load; when the state signal of the second power supply is a normal state signal but the voltage of the second power supply detected at the second power supply port 30 is less than the preset voltage threshold, although the second power supply is normally connected, the second power supply is in a power-off state and fails to supply power to the load, thereby controlling the switching circuit 20 to be turned on to allow the first power supply to supply power to the load, thereby ensuring the power supply state of the load.

[0078] In another embodiment, when an abnormal state signal is received or the state signal is not received, the control circuit 50 controls the switching circuit 20 to be turned on.

[0079] In the specific implementation process, when the control circuit 50 receives the abnormal state signal of the second power supply through the communication port, it is determined that the second power supply is in an abnormal state and cannot supply power to the load, and then the control circuit 50 controls the switch circuit 20 to be turned on to allow the first power supply to supply power to the load.

[0080] When the control circuit 50 fails to receive the state signal of the second power supply through the communication port, it is determined that the second power supply is not connected to the power supply circuit 100 or is in an inoperable state, and the control circuit 50 also controls the switch circuit 20 to be turned on to allow the first power supply to supply power to the load, thereby ensuring the power supply to the load.

[0081] It should be understood that when the abnormal state signal is received or the state signal is not received, the control circuit 50 does not need to process the detection signal and directly controls the switch circuit 20 to be turned on.

[0082] In an embodiment, the power supply circuit 100 further comprises a first power supply, the first power supply is connected to the switch circuit 20, and the second power supply is an external power supply.

[0083] For example, the power supply circuit 100 comprises a first power supply, i.e., the first power supply is a power supply built in the power supply circuit 100, and the second power supply is an external power supply, i.e., the second power supply can be plugged into or pulled out of the power supply circuit 100, so that the control circuit 50 can fail to detect the state signal of the second power supply (the second power supply is not connected to the power supply circuit 100), and then the control circuit 50 can directly control the switch circuit 20 to be turned on when the power supply circuit 100 is not connected to the second power supply. When the second power supply is connected to the power supply circuit 100, the control circuit 50 controls the switch circuit 20 according to the detection signal output by the signal trigger circuit 40 and the state signal of the second power supply.

[0084] In other embodiments, the power supply circuit 100 can also comprise a first power supply and a second power supply.

[0085] The power supply circuit 100 provided in the present application detects the electrical signal of the second power supply port 30 to control the power supply state of the first power supply to the load according to the detection signal corresponding to the port, thereby realizing the automatic switching of multiple batteries in the energy storage power supply and avoiding the occurrence of instantaneous large current in the battery switching process.

[0086] Please refer to Figure 5 , Figure 5 The structure schematic diagram of the energy storage power supply 300 provided in an embodiment of the present application.

[0087] In an embodiment, the energy storage power supply 300 comprises a housing and the power supply circuit 100, wherein the power supply circuit 100 is provided as any of the power supply circuits 100 described above, and the power supply circuit 100 is at least partially arranged in the housing. It should be understood that the energy storage power supply 300 is capable of supplying power to an external load through the power supply circuit 100, and providing the required operating voltage for the load.

[0088] As shown in Figure 5 , the energy storage power supply 300 comprises a first power supply 200, and the first power supply 200 is connected to the power supply circuit 100, so as to supply power to an external load of the energy storage power supply 300 through the power supply circuit 100.

[0089] Please refer to Figure 6 , Figure 6 , a structural schematic diagram of an energy storage power supply system 500 provided by an embodiment of the present application.

[0090] As shown in Figure 6 , the energy storage power supply system 500 comprises the energy storage power supply 300 and a second power supply 400, and the second power supply 400 is capable of being connected to the energy storage power supply 300, so that the second power supply 400 is capable of supplying power to a load connected to the energy storage power supply 300 through the power supply circuit 100 in the energy storage power supply 300, and after the second power supply 400 completes the power supply, the connection with the energy storage power supply 300 can be disconnected, and the energy storage power supply 300 is capable of continuing to supply power to the load through the internal first power supply 200, or has completed the power supply to the load and stops supplying power to the load.

[0091] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms “mounting”, “connection”, “connecting” should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected. It can be mechanical connection, or electrical connection. It can be directly connected, or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0092] In the present application, unless otherwise explicitly specified and limited, the first feature “on” or “under” the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature “on”, “above” and “on the” the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The first feature “under”, “below” and “under” the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.

[0093] The above disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described above. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numerals and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art can realize the application of other processes and / or the use of other materials.

[0094] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0095] The above embodiments are only preferred embodiments of the present application, and cannot limit the scope of protection of the present application. Any non-essential changes and substitutions made by those skilled in the art on the basis of the present application are within the scope of protection of the present application.

Claims

1. A power supply circuit, characterized in that, The power supply circuit includes: Power supply port, used for connecting external loads; A switching circuit is used to connect the first power source and the power supply port; The second power port is used to connect a second power source; A signal triggering circuit is used to output a detection signal based on the electrical signal at the second power port; A control circuit is used to control the operating state of the switching circuit according to the detection signal, so as to control the power supply state of the first power source to the load.

2. The power supply circuit as described in claim 1, characterized in that, The signal triggering circuit is used to detect whether the voltage at the second power port is greater than a preset voltage threshold and outputs a detection signal.

3. The power supply circuit as described in claim 1 or 2, characterized in that, When the voltage at the second power port is less than a preset voltage threshold, the control circuit controls the switching circuit to turn on according to the detection signal, so as to allow the first power supply to supply power to the load.

4. The power supply circuit as described in claim 1 or 2, characterized in that, If the voltage at the second power port is greater than or equal to a preset voltage threshold, the control circuit controls the switching circuit to turn off according to the detection signal, so as to prevent the first power source from supplying power to the load.

5. The power supply circuit as described in claim 1 or 2, characterized in that, The signal triggering circuit includes a voltage comparison circuit and a third power supply circuit; The first input terminal of the voltage comparison circuit is connected to the third power supply circuit, the second input terminal of the voltage comparison circuit is connected to the second power supply port, and the output terminal of the voltage comparison circuit is connected to the control circuit. The voltage comparison circuit is used to compare the electrical signal of the third power supply circuit with the electrical signal of the second power supply port, and outputs the detection signal.

6. The power supply circuit as described in claim 1 or 2, characterized in that, The switching circuit includes a switch driving component and a switch component; The first end of the switch assembly is connected to the first power source, and the second end of the switch assembly is connected to the power supply port; The switch driving component is used to control the conduction state of the switch component according to the control signal output by the control circuit, so as to control the power supply state of the first power supply to the load.

7. The power supply circuit as described in claim 6, characterized in that, When the voltage at the second power port is less than a preset voltage threshold, the switch driving component is used to control the switch component to turn on according to the turn-on signal output by the control circuit, so that the first power supply supplies power to the load through the turned-on switch component; When the voltage at the second power port is greater than or equal to a preset voltage threshold, the switch driving component is used to control the switch component to turn off according to the turn-off signal output by the control circuit, so as to prevent the first power supply from supplying power to the load.

8. The power supply circuit as described in claim 6, characterized in that, The switch driving component includes a transistor or a MOSFET, and / or the switch component includes a transistor or a MOSFET.

9. The power supply circuit as described in claim 1, characterized in that, The control circuit also includes a communication port for communicating with the second power supply.

10. The power supply circuit as described in claim 9, characterized in that, The control circuit is also used to receive the status signal of the second power supply through the communication port in order to control the operating state of the switching circuit.

11. The power supply circuit as described in claim 9, characterized in that, The control circuit is also used to output a power control signal through the communication port to control the power supply status of the second power supply to the load.

12. The power supply circuit as described in claim 9 or 10, characterized in that, Upon receiving a normal state signal from the second power source, the control circuit controls the operating state of the switching circuit according to the control signal output by the signal trigger circuit. When an abnormal status signal is received or when the status signal is not received, the control circuit controls the switching circuit to turn on.

13. The power supply circuit as described in claim 1, characterized in that, The power supply circuit also includes a first power source connected to the switching circuit, and the second power source is an external power source.

14. An energy storage power source, characterized in that, It includes a housing and a power supply circuit as described in any one of claims 1-13, wherein the power supply circuit is at least partially disposed in the housing.

15. An energy storage power system, characterized in that, It includes the energy storage power supply as described in claim 14 and the second power supply, wherein the second power supply is connected to the energy storage power supply.

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