Low-power-consumption auxiliary power supply and energy storage battery system

Abstract

The invention provides a low-power-consumption auxiliary power supply and an energy storage battery system. The auxiliary power supply with low power consumption comprises a high-frequency transformer; the first end of the auxiliary output circuit is connected with the secondary side of the high-frequency transformer, the second end of the auxiliary output circuit is provided with an output port, and the output port is used for transmitting energy; the auxiliary output circuit further comprises a universal triode, the emitter of the universal triode is connected with the first end of the output port, and the collector of the universal triode is connected with the first end of the secondary side of the high-frequency transformer. And the control circuit is respectively connected with the base electrode of the universal triode and the secondary side of the high-frequency transformer, and is used for controlling the universal triode to be in a cut-off state when the system works in a standby mode or a low-loss working condition, so that the secondary output circuit stops transmitting energy. Output is controlled through the control circuit according to the load requirement and the working mode of the system, unnecessary system power consumption is reduced, and the overall system efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of electric power technology, and in particular to a low-power auxiliary power supply and an energy storage battery system. Background Art

[0002] In the related art, the auxiliary power supply is completely controlled by the analog control chip, which lacks flexibility and intelligence and cannot adjust the output according to actual needs, resulting in a certain amount of energy waste. In other words, the power consumption of the auxiliary power supply in the related art is relatively high. Therefore, proposing an auxiliary power supply with low power consumption is the main problem that needs to be solved at present. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] To this end, a first aspect of the present invention provides a low-power auxiliary power supply.

[0005] A second aspect of the present invention provides an energy storage battery system.

[0006] In view of this, according to a first aspect of the present invention, a low-power auxiliary power supply is proposed, comprising: a high-frequency transformer; at least one auxiliary output circuit, wherein a first end of the auxiliary output circuit is connected to the secondary side of the high-frequency transformer, and a second end of the auxiliary output circuit has an output port, and the output port is used to transmit energy; the auxiliary output circuit also includes: a universal transistor, wherein the emitter of the universal transistor is connected to the first end of the output port, and the collector of the universal transistor is connected to the first end of the secondary side of the high-frequency transformer; and a control circuit, wherein the control circuit is respectively connected to the base of the universal transistor and the secondary side of the high-frequency transformer, and is used to control the universal transistor to be in a cut-off state when the system is operating in standby mode or low-loss operating conditions, so as to stop the auxiliary output circuit from transmitting energy.

[0007] The low-power auxiliary power supply provided by the present invention primarily comprises: a high-frequency transformer, at least one auxiliary output circuit, and a control circuit. The number of auxiliary output circuits may be multiple, with a first end of the auxiliary output circuit connected to the secondary side of the high-frequency transformer, and a second end of the auxiliary output circuit having an output port for transmitting energy. The high-frequency transformer has a primary side and a secondary side, and the high-frequency transformer performs an energy transfer function, transferring energy from the primary side to the secondary side via magnetic coupling, which in turn transfers the energy to the at least one auxiliary output circuit. The auxiliary output circuit also includes a universal transistor, wherein the emitter of the universal transistor is connected to the first end of the output port, the collector of the universal transistor is connected to the first end of the secondary side of the high-frequency transformer, and the base of the universal transistor is connected to the control circuit. The second end of the secondary side of the high-frequency transformer is connected to the second end of the output port. When the universal transistor is in an on state, the auxiliary output circuit can output energy through the output port. When the universal transistor is in an off state, the auxiliary output port cannot output energy. The low-power auxiliary power supply also includes a control circuit, wherein the control circuit is respectively connected to the base of a universal transistor and the secondary side of a high-frequency transformer. When the system operates in standby mode or a low-loss operating condition, the control circuit can turn the universal transistor into a cut-off state, thereby causing the auxiliary output circuit to stop transmitting energy. The present invention provides a universal transistor in the auxiliary output circuit and provides a control circuit respectively connected to the base of the universal transistor and the secondary side of the high-frequency transformer. When the system operates in standby mode or a low-loss operating condition, the control circuit can control the universal transistor to be cut off, thereby disconnecting the auxiliary output circuit and preventing the high-frequency transformer from outputting energy, thereby reducing unnecessary system power consumption. The present invention uses the control circuit to control the output of the auxiliary output circuit according to the system's load requirements and operating mode, reducing unnecessary output power, improving the efficiency of the entire system, and also ensuring the stability of the control system's power supply.

[0008] In some technical solutions, optionally, the control circuit includes: a switching transistor, the collector of the switching transistor is respectively connected to the first end of the secondary side of the high-frequency transformer and the base of the universal transistor, and the emitter of the switching transistor is respectively connected to the second end of the secondary side of the high-frequency transformer and the second end of the output port; a controller, the controller is connected to the base of the switching transistor, and is used to output a high-level signal when the system operates in standby mode or low-loss working conditions, so that the switching transistor is in the on state, the universal transistor is in the off state, and the secondary output circuit stops transmitting energy.

[0009] In this technical solution, the control circuit includes a switching transistor and a controller. The collector of the switching transistor is connected to the first end of the secondary side of the high-frequency transformer and the base of the universal transistor, respectively, and the emitter of the switching transistor is connected to the second end of the secondary side of the high-frequency transformer and the second end of the output port, respectively. When the system is operating in standby mode or low-loss operation, the controller outputs a high level, turning on the switching transistor and, in turn, turning off the universal transistor. This disconnects the secondary output circuit, preventing it from outputting energy. This achieves the technical effect of preventing the secondary output circuit from outputting energy when the system is operating in standby mode or low-loss operation.

[0010] In some technical solutions, optionally, the low-power auxiliary power supply also includes: a sampling resistor, the sampling resistor is connected to the output port and is used to collect the voltage of the output port; a voltage stabilizing circuit, the first end of the voltage stabilizing circuit is connected to the sampling resistor, the second end of the voltage stabilizing circuit is respectively connected to the first end of the secondary side of the high-frequency transformer and the base of the universal transistor, and the third end of the voltage stabilizing circuit is respectively connected to the second end of the secondary side of the high-frequency transformer and the second end of the output port, wherein, when the voltage of the output port is greater than a preset voltage, the voltage stabilizing circuit is in an on state, so that the universal transistor is in an off state, and the auxiliary output circuit stops transmitting energy; when the voltage of the output port is less than or equal to the preset voltage, the voltage stabilizing circuit is in an off state, so that the universal transistor is in an on state, and the auxiliary output circuit transmits energy.

[0011] In this technical solution, the low-power auxiliary power supply further includes a sampling resistor and a voltage-stabilizing circuit. The sampling resistor is connected to the output port for collecting the voltage at the output port. A first end of the voltage-stabilizing circuit is connected to the sampling resistor, a second end of the voltage-stabilizing circuit is connected to the second end of the secondary side of the high-frequency transformer and the base of the universal transistor, respectively, and a third end of the voltage-stabilizing circuit is connected to the second end of the secondary side of the high-frequency transformer and the second end of the output port, respectively. When the voltage at the output port is greater than a preset voltage, the voltage-stabilizing circuit is turned on, causing the universal transistor to be turned off, thereby stopping the auxiliary output circuit from transmitting energy. When the voltage at the output port is less than or equal to the preset voltage, the voltage-stabilizing circuit is turned off, causing the universal transistor to be turned on, thereby enabling the auxiliary output circuit to transmit energy. The present invention improves the stability and accuracy of the output voltage of the entire low-power auxiliary power supply through closed-loop output feedback. It also significantly reduces the power consumption of the voltage-stabilizing circuit, avoids output voltage instability caused by auxiliary power supply load fluctuations, and improves the accuracy and stability of the output voltage of the entire system. At the same time, the present invention also greatly reduces the cross-regulation rate of the low-power auxiliary power supply, so that the output voltage accuracy of each channel of the low-power auxiliary power supply is relatively high and is not affected by load fluctuations. It realizes the adjustment of the output of the low-power auxiliary power supply according to actual needs, thereby avoiding energy waste. At the same time, it also reduces the process difficulty of the winding in the high-frequency transformer of the low-power auxiliary power supply and the requirements on the coupling degree, especially for the low-power auxiliary power supply with multiple outputs.

[0012] In some technical solutions, optionally, the auxiliary output circuit includes: a first auxiliary output circuit and a second auxiliary output circuit; the output port includes: a first output port and a second output port; the secondary side of the high-frequency transformer includes: a first secondary side of the high-frequency transformer and a second secondary side of the high-frequency transformer; the first secondary side of the high-frequency transformer is connected to the first auxiliary output circuit, and the first auxiliary output circuit has a first output port, and the second secondary side of the high-frequency transformer is connected to the second auxiliary output circuit, and the second auxiliary output circuit has a second output port; the second end of the first secondary side of the high-frequency transformer is connected to the second end of the first output port, and the second end of the second secondary side of the high-frequency transformer is connected to the second end of the second output port.

[0013] In this technical solution, the auxiliary output circuit may include a first auxiliary output circuit and a second auxiliary output circuit, and the output port may include a first output port and a second output port. The first auxiliary output circuit includes a first output port, and the second auxiliary output circuit includes a second output port. The loads connected to the first auxiliary output port and the second output port may be the same or different. Furthermore, the secondary side of the high-frequency transformer includes: a first secondary side of the high-frequency transformer and a second secondary side of the high-frequency transformer. The first secondary side of the high-frequency transformer is connected to the first auxiliary output circuit, and the second secondary side of the high-frequency transformer is connected to the second auxiliary output circuit. Specifically, the second end of the first secondary side of the high-frequency transformer is connected to the second end of the first output port, and the second end of the second secondary side of the high-frequency transformer is connected to the second end of the second output port.

[0014] In some technical solutions, optionally, the universal transistor includes: a first transistor, the emitter of the first transistor is connected to the first end of the first output port, the collector of the first transistor is connected to the first end of the first secondary side of the high-frequency transformer, and the base of the first transistor is connected to the control circuit; a second transistor, the emitter of the second transistor is connected to the first end of the second output port, the collector of the first transistor is connected to the first end of the second secondary side of the high-frequency transformer, and the base of the first transistor is connected to the control circuit.

[0015] In this technical solution, the universal transistor includes: a first transistor and a second transistor. The first transistor is located in the first secondary output circuit, and the second transistor is located in the second secondary output circuit. Specifically, the emitter of the first transistor is connected to the first end of the first output port, the collector of the first transistor is connected to the first end of the first secondary side of the high-frequency transformer, and the base of the first transistor is connected to the control circuit. When the system operates in standby mode or low-loss operating conditions, the control circuit controls the first transistor to be in a cut-off state, thereby causing the first secondary output circuit to stop transmitting energy. The emitter of the second transistor is connected to the first end of the second output port, the collector of the first transistor is connected to the first end of the second secondary side of the high-frequency transformer, and the base of the first transistor is connected to the control circuit. When the system operates in standby mode or low-loss operating conditions, the control circuit controls the second transistor to be in a cut-off state, thereby causing the second secondary output circuit to stop transmitting energy.

[0016] In some technical solutions, optionally, the switching transistor includes: a third transistor, the collector of the third transistor is respectively connected to the first end of the first secondary side of the high-frequency transformer and the base of the first transistor, the emitter of the third transistor is respectively connected to the second end of the first secondary side of the high-frequency transformer and the second end of the first output port, and the base of the third transistor is connected to the controller; a fourth transistor, the collector of the fourth transistor is respectively connected to the first end of the second secondary side of the high-frequency transformer and the base of the second transistor, the emitter of the fourth transistor is respectively connected to the second end of the second secondary side of the high-frequency transformer and the second end of the second output port, and the base of the fourth transistor is connected to the controller.

[0017] In this technical solution, the switching transistor includes a third transistor and a fourth transistor. The third transistor is connected to the first secondary output circuit, and the fourth transistor is connected to the second secondary output circuit. Specifically, the collector of the third transistor is connected to the first end of the first secondary side of the high-frequency transformer and the base of the first transistor, respectively. The emitter of the third transistor is connected to the second end of the first secondary side of the high-frequency transformer and the second end of the first output port, respectively. The base of the third transistor is connected to the controller. When the system is operating in standby mode or low-loss operating conditions, the controller outputs a high level, the third transistor is in the on state, the first transistor is in the off state, and the first secondary output circuit stops outputting energy. The collector of the fourth transistor is respectively connected to the first end of the second secondary side of the high-frequency transformer and the base of the second transistor, the emitter of the fourth transistor is respectively connected to the second end of the second secondary side of the high-frequency transformer and the second end of the second output port, and the base of the fourth transistor is connected to the controller. When the system operates in standby mode or low-loss working condition, the controller outputs a high level, the fourth transistor is in the on state, so that the second transistor is in the off state, and the second secondary output circuit stops outputting energy.

[0018] In some technical solutions, optionally, the control circuit also includes: a first resistor, the first end of the first resistor is connected to the base of the third transistor, and the second end of the first resistor is connected to the controller; a second resistor, the first end of the second resistor is connected to the base of the fourth transistor, and the second end of the second resistor is connected to the controller.

[0019] In this technical solution, the control circuit further includes: a first resistor and a second resistor. The first end of the first resistor is connected to the base of the third transistor, and the second end of the first resistor is connected to the controller. In other words, the first resistor is connected in series between the base of the third transistor and the controller, thereby protecting the third transistor. The first end of the second resistor is connected to the base of the fourth transistor, and the second end of the second resistor is connected to the controller. In other words, the second resistor is connected in series between the fourth transistor and the controller, thereby protecting the fourth transistor.

[0020] In some technical solutions, optionally, the sampling resistor includes: a third resistor, a first end of the third resistor being connected to the emitter of the first transistor and the first end of the first output port, respectively; a fourth resistor, a first end of the fourth resistor being connected to the second end of the third resistor, and a second end of the fourth resistor being connected to the second end of the first output port and the secondary side of the high-frequency transformer, respectively; a fifth resistor, a first end of the fifth resistor being connected to the emitter of the second transistor and the first end of the second output port, respectively; and a sixth resistor, a first end of the sixth resistor being connected to the second end of the fifth resistor, and a second end of the sixth resistor being connected to the second end of the second output port and the secondary side of the high-frequency transformer, respectively.

[0021] In this technical solution, the sampling resistor includes: a third resistor, a fourth resistor, a fifth resistor, and a sixth resistor. The first end of the third resistor is connected to the emitter of the first transistor and the first end of the first output port, respectively; the second end of the third resistor is connected to the first end of the fourth resistor; and the second end of the fourth resistor is connected to the second end of the first output port and the secondary side of the high-frequency transformer, respectively. That is, the third and fourth resistors are connected in series, and then the third and fourth resistors connected in series are connected in parallel to the first output port. This allows the voltage of the first output port to be determined based on the voltages of the third and fourth resistors, thereby enabling sampling of the voltage of the first output port. The first end of the fifth resistor is connected to the emitter of the second transistor and the first end of the second output port, respectively; the second end of the fifth resistor is connected to the first end of the sixth resistor, and the second end of the sixth resistor is connected to the second end of the second output port and the secondary side of the high-frequency transformer, respectively. That is, the fifth and sixth resistors are connected in series, and then the fifth and sixth resistors connected in series are connected in parallel to the second output port. This allows the voltage of the second output port to be determined based on the voltages of the fifth and sixth resistors, thereby enabling sampling of the voltage of the second output port.

[0022] In some technical solutions, optionally, the voltage stabilization circuit includes: a first linear regulator, a first pin of the first linear regulator is respectively connected to the base of the first transistor and the first end of the first secondary side of the high-frequency transformer, a second pin of the first linear regulator is respectively connected to the second end of the first secondary side of the high-frequency transformer and the second end of the first output port, and a third pin of the first linear regulator is respectively connected to the third resistor and the fourth resistor, wherein when the voltage of the first output port is greater than a preset voltage, the first linear regulator is in an on state; when the voltage of the first output port is less than or equal to the preset voltage, the first linear regulator is in an off state.

[0023] In this technical solution, the voltage stabilization circuit includes a first linear voltage regulator. A first pin of the first linear voltage regulator may be the second end of the voltage stabilization circuit, connected to the base of the first transistor and the first end of the first secondary side of the high-frequency transformer, respectively. A second pin of the first linear voltage regulator may be the third end of the voltage stabilization circuit, connected to the second end of the first secondary side of the high-frequency transformer and the second end of the first output port, respectively. A third pin of the first linear voltage regulator may be the first end of the voltage stabilization circuit, connected to a third resistor and a fourth resistor, respectively. Specifically, the voltage of the first output port sampled by the third resistor and the fourth resistor can be input into the first linear voltage regulator via the third pin. In the first linear voltage regulator, when the voltage at the first output port is greater than a preset voltage, the first linear voltage regulator is turned on, causing the first transistor to be turned off, thereby stopping energy transmission from the first secondary output circuit. When the voltage at the first output port is less than or equal to the preset voltage, the first linear voltage regulator is turned off, causing the first transistor to be turned on, thereby enabling energy transmission from the first secondary output circuit.

[0024] In some technical solutions, optionally, the voltage stabilization circuit includes: a second linear regulator, a first pin of the second linear regulator is respectively connected to the base of the second transistor and the first end of the second secondary side of the high-frequency transformer, a second pin of the second linear regulator is respectively connected to the second end of the second secondary side of the high-frequency transformer and the second end of the second output port, and a third pin of the second linear regulator is respectively connected to the fifth resistor and the sixth resistor, wherein when the voltage of the second output port is greater than a preset voltage, the second linear regulator is in an on state; when the voltage of the second output port is less than or equal to the preset voltage, the second linear regulator is in an off state.

[0025] In this technical solution, the voltage stabilization circuit includes a second linear voltage regulator. The first pin of the second linear voltage regulator may be the second end of the voltage stabilization circuit, connected to the base of the second transistor and the first end of the second secondary side of the high-frequency transformer, respectively. The second pin of the second linear voltage regulator may be the third end of the voltage stabilization circuit, connected to the second end of the second secondary side of the high-frequency transformer and the second end of the second output port, respectively. The third pin of the second linear voltage regulator may be the first end of the voltage stabilization circuit, connected to a fifth resistor and a sixth resistor, respectively. Specifically, the voltage of the second output port sampled by the fifth resistor and the sixth resistor can be input into the second linear voltage regulator via the third pin. In the second linear voltage regulator, when the voltage at the second output port is greater than a preset voltage, the second linear voltage regulator is turned on, causing the second transistor to be turned off, thereby stopping energy transmission in the second secondary output circuit. When the voltage at the second output port is less than or equal to the preset voltage, the second linear voltage regulator is turned off, causing the second transistor to be turned on, thereby enabling energy transmission in the second secondary output circuit.

[0026] In some technical solutions, optionally, the low-power auxiliary power supply also includes: a seventh resistor, the first end of the seventh resistor is connected to the first end of the first secondary side of the high-frequency transformer, and the second end of the seventh resistor is respectively connected to the collector of the third transistor, the first pin of the first linear regulator and the base of the first transistor, for protecting the first transistor, the third transistor and the first linear regulator.

[0027] In this technical solution, the low-power auxiliary power supply further includes a seventh resistor. A first end of the seventh resistor is connected to the first end of the first secondary side of the high-frequency transformer, and a second end of the seventh resistor is connected to the collector of the third transistor, the first pin of the first linear regulator, and the base of the first transistor, respectively. Specifically, the seventh resistor is connected in series between the first end of the first secondary side of the high-frequency transformer and the base of the first transistor. When the high-frequency transformer transfers energy to the base of the first transistor, the seventh resistor protects the first transistor. The seventh resistor is also connected in series between the first end of the first secondary side of the high-frequency transformer and the collector of the third transistor. When the third transistor is conducting, the high-frequency transformer transfers energy to the collector of the third transistor, and the seventh resistor protects the third transistor. The seventh resistor is also connected in series between the first end of the first secondary side of the high-frequency transformer and the first pin of the first linear regulator. When the first linear regulator is conducting, the high-frequency transformer transfers energy to the first linear regulator, and the seventh resistor protects the first linear regulator.

[0028] In some technical solutions, optionally, the low-power auxiliary power supply also includes: an eighth resistor, the first end of the eighth resistor is connected to the first end of the second secondary side of the high-frequency transformer, and the second end of the eighth resistor is respectively connected to the collector of the fourth transistor, the first pin of the second linear regulator and the base of the second transistor, for protecting the second transistor, the fourth transistor and the second linear regulator.

[0029] In this technical solution, the low-power auxiliary power supply also includes an eighth resistor. The first end of the eighth resistor is connected to the first end of the second secondary side of the high-frequency transformer, and the second end of the eighth resistor is connected to the collector of the fourth transistor, the first pin of the second linear regulator, and the base of the second transistor, respectively. In other words, the eighth resistor is connected in series between the first end of the second secondary side of the high-frequency transformer and the base of the second transistor. When the high-frequency transformer transfers energy to the base of the second transistor, the eighth resistor protects the second transistor. The eighth resistor is also connected in series between the first end of the second secondary side of the high-frequency transformer and the collector of the fourth transistor. When the fourth transistor is conducting, the high-frequency transformer transfers energy to the collector of the fourth transistor, and the eighth resistor protects the fourth transistor. The eighth resistor is also connected in series between the first end of the second secondary side of the high-frequency transformer and the first pin of the second linear regulator. When the second linear regulator is conducting, the high-frequency transformer transfers energy to the second linear regulator, and the eighth resistor protects the second linear regulator.

[0030] In some technical solutions, optionally, the first secondary output circuit also includes: a first output rectifier tube, the anode of the first output rectifier tube is connected to the first end of the first secondary side of the high-frequency transformer, and the cathode of the first output rectifier tube is respectively connected to the collector of the first transistor and the first end of the seventh resistor, for rectifying the pulse energy output by the high-frequency transformer into DC energy.

[0031] In this technical solution, the first secondary output circuit further includes a first output rectifier. The anode of the first output rectifier is connected to the first end of the first secondary side of the high-frequency transformer, and the cathode of the first output rectifier is connected to the collector of the first transistor and the first end of the seventh resistor, respectively. The first output rectifier is capable of rectifying the pulse energy output by the high-frequency transformer into DC energy.

[0032] In some technical solutions, optionally, the second auxiliary output circuit also includes: a second output rectifier tube, the anode of the second output rectifier tube is connected to the first end of the second secondary side of the high-frequency transformer, and the cathode of the second output rectifier tube is respectively connected to the collector of the second transistor and the first end of the eighth resistor, for rectifying the pulse energy output by the high-frequency transformer into DC energy.

[0033] In this technical solution, the second secondary output circuit further includes a second output rectifier. The anode of the second output rectifier is connected to the first end of the second secondary side of the high-frequency transformer, and the cathode of the second output rectifier is connected to the collector of the second transistor and the first end of the eighth resistor, respectively. The second output rectifier is capable of rectifying the pulse energy output by the high-frequency transformer into DC energy.

[0034] In some technical solutions, optionally, the low-power auxiliary power supply also includes: a high-frequency switching tube, the first end of the high-frequency switching tube is connected to the input circuit, and the second end of the high-frequency switching tube is connected to the primary side of the high-frequency transformer, which is used to convert the DC energy input by the input circuit into pulse energy; a first capacitor, the first capacitor is connected in parallel with the input circuit, and is used for filtering.

[0035] In this technical solution, the low-power auxiliary power supply also includes: a high-frequency switching tube and a first capacitor. The first end of the high-frequency switching tube is connected to the input circuit, and the second end of the high-frequency switching tube is connected to the primary side of the high-frequency transformer. The high-frequency switching tube can convert the DC energy input by the input circuit into pulse energy and transmit it to the high-frequency transformer. The input circuit can be a power supply circuit such as a battery, an inverter bus, a DC source, or a photovoltaic module. The first capacitor is connected in parallel with the input circuit to filter out the high-frequency switching ripple and improve EMC (Electro Magnetic Compatibility) performance.

[0036] In some technical solutions, optionally, the low-power auxiliary power supply also includes: a main output circuit, the first end of the main output circuit is connected to the third secondary side of the high-frequency transformer, the second end of the main output circuit has a third output port, and the third output port is used to transmit energy; the main output circuit includes: a third output rectifier tube, the anode of the third output rectifier tube is connected to the first end of the third secondary side of the high-frequency transformer, the cathode of the third output rectifier tube is connected to the first end of the third output port, the second end of the third secondary side of the high-frequency transformer is connected to the second end of the third output port, and is used to rectify the pulse energy output by the high-frequency transformer into DC energy.

[0037] In this technical solution, the low-power auxiliary power supply also includes: a main output circuit. The first end of the main output circuit is connected to the third secondary side of the high-frequency transformer, and the second end of the main output circuit has a third output port, which is capable of transmitting energy. The low-power auxiliary power supply mainly transmits energy through the main output circuit. The main output circuit is the main feedback output of the low-power auxiliary power supply and has high voltage accuracy. Furthermore, the main output circuit includes: a third output rectifier. The anode of the third output rectifier is connected to the first end of the third secondary side of the high-frequency transformer, and the cathode of the third output rectifier is connected to the first end of the third output port. The third output rectifier can rectify the pulse energy output by the high-frequency transformer into DC energy and transmit it to the third output port.

[0038] According to a second aspect of the present invention, an energy storage battery system is proposed, wherein the energy storage battery system includes: a low-power auxiliary power supply as in any of the above technical solutions.

[0039] The energy storage battery system provided by the present invention mainly includes: a low-power auxiliary power supply as in any of the above technical solutions. Therefore, it has the technical effects of any of the above technical solutions in the first aspect, which will not be described in detail here.

[0040] Additional aspects and advantages of the invention will become apparent from the description which follows, or may be learned by practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0042] Figure 1 One of the structural diagrams of the auxiliary power supply in the related art is shown;

[0043] Figure 2 The second structural diagram of the auxiliary power supply in the related art is shown;

[0044] Figure 3 One of the structural schematic diagrams of an auxiliary power supply according to an embodiment of the present invention is shown;

[0045] Figure 4 A second structural diagram of an auxiliary power supply according to an embodiment of the present invention is shown;

[0046] Figure 5 A third structural diagram of an auxiliary power supply according to an embodiment of the present invention is shown;

[0047] Figure 6 A schematic structural diagram of an energy storage battery system according to an embodiment of the present invention is shown.

[0048] in, Figure 1 and Figure 2 The corresponding relationship between the reference numerals and component names is as follows:

[0049] 10' auxiliary power supply, 102' input circuit, 112' first capacitor, 114' first high-frequency switching tube, 116' second high-frequency switching tube, 118' first high-frequency transformer, 120' second high-frequency transformer, 122' first output rectifier tube, 124' second output rectifier tube, 126' third output rectifier tube, 128' second capacitor, 130' third capacitor, 132' fourth capacitor, 104' first output port, 106' second output port, 108' third output port, 110' output circuit.

[0050] Figures 3 to 6 The corresponding relationship between the reference numerals and component names is as follows:

[0051] 10 low-power auxiliary power supply, 122 high-frequency transformer, 1222 primary side of high-frequency transformer, 1224 secondary side of high-frequency transformer, 1226 first secondary side of high-frequency transformer, 1228 second secondary side of high-frequency transformer, 1230 third secondary side of high-frequency transformer, 1232 first end of secondary side of high-frequency transformer, 1234 second end of secondary side of high-frequency transformer, 1236 first end of first secondary side of high-frequency transformer, 1238 second end of first secondary side of high-frequency transformer, 1240 first end of second secondary side of high-frequency transformer, 1242 second end of second secondary side of high-frequency transformer, 1244 high a first end of the third secondary side of the high-frequency transformer, a second end of the third secondary side of the high-frequency transformer 1246, a secondary output circuit 102, a first end of the secondary output circuit 1022, a second end of the secondary output circuit 1024, an output port 1026, a first end of the output port 1028, a second end of the output port 1030, a general-purpose transistor 104, a control circuit 106, a switching transistor 1062, a controller 1064, a sampling resistor 110, a voltage regulator circuit 1102, a first end of the voltage regulator circuit 1104, a second end of the voltage regulator circuit 1106, a third end of the voltage regulator circuit 112, a first secondary output circuit, 114 second auxiliary output circuit, 1122 first output port, 1124 first end of the first output port, 1126 second end of the first output port, 1142 second output port, 1144 first end of the second output port, 1146 second end of the second output port, 124 first transistor, 126 second transistor, 128 third transistor, 130 fourth transistor, 132 first resistor, 134 second resistor, 136 third resistor, 138 fourth resistor, 140 fifth resistor, 142 sixth resistor, 144 first linear regulator, 146 second linear regulator, 148 seventh resistor , 150 eighth resistor, 152 first output rectifier, 154 second output rectifier, 156 high-frequency switching tube, 1162 first end of the high-frequency switching tube, 1164 second end of the high-frequency switching tube, 158 first capacitor, 118 main output circuit, 1182 first end of the main output circuit, 1184 second end of the main output circuit, 1186 third output port, 1188 first end of the third output port, 1190 second end of the third output port, 160 third output rectifier, 120 input circuit, 162 second capacitor, 164 third capacitor, 166 fourth capacitor, 20 energy storage battery system. DETAILED DESCRIPTION

[0052] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present invention and the features therein can be combined with each other without conflict.

[0053] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0054] like Figure 1 and Figure 2 As shown, Figure 1 and Figure 2 The auxiliary power supply 10' in the related art is Figure 1 In the figure, the auxiliary power supply 10' comprises, from left to right, an input circuit 102', a first capacitor 112', a first high-frequency switching tube 114', a first high-frequency transformer 118', and three parallel output circuits 110'. The output circuit 110' includes a first output rectifier 122', a second output rectifier 124', a third output rectifier 126', and corresponding second, third, and fourth capacitors 128', 130', and 132', as well as corresponding first, second, and third output ports 104', 106', and 108'. The auxiliary power supply 10' operates as follows: the input circuit 102' can transfer energy to the auxiliary power supply 10', the first capacitor 112' filters the energy transferred by the input circuit 102', and then the first high-frequency switching tube 114' converts the input DC energy into pulses through high-frequency switching for storage in the first high-frequency transformer 118'. The first high-frequency transformer 118' transfers energy to the first output rectifier 122', the second output rectifier 124', and the third output rectifier 126'. Then the first output rectifier 122', the second output rectifier 124', and the third output rectifier 126' rectify the high-frequency pulse voltage transferred by the first high-frequency transformer 118' into a stable DC output to the corresponding second capacitor 128', the third capacitor 130', and the fourth capacitor 132'. After the second capacitor 128', the third capacitor 130', and the fourth capacitor 132' filter out the high-frequency switching ripple, the power is transmitted to the load through the corresponding first output port 104', the second output port 106', and the third output port 108'. However, in Figure 1 A significant characteristic of this type of system is poor output regulation, especially in applications with high output power and large load fluctuations. For example, if the output load is a fan with variable speed, the power required for different fan speeds can vary significantly. When the load is high, the output voltage of windings other than the main feedback winding will be high. When the output load decreases, the output voltage of windings other than the main feedback winding will be low. In short, the output voltage of windings other than the main feedback winding is affected by the load connected to the main feedback output. Fluctuations in the winding output voltage can affect the operating stability and power consumption of the power supply circuit, impacting the stability of the entire system.

[0055] Based on this, Figure 2 An improved auxiliary power supply 10' is shown. Figure 2 As shown, a second high-frequency switch tube 116' is added between the high-frequency transformer and the first capacitor 112', and the first high-frequency transformer 118' is replaced by a second high-frequency transformer 120'. The winding structure of the second high-frequency transformer 120' is optimized compared to the first high-frequency transformer 118', and the coupling degree between the windings of the second high-frequency transformer 120' is higher. However Figure 2 The auxiliary power supply 10' provided in the embodiment has little effect on the scenario of multi-winding output, and also requires additional loss and cost.

[0056] like Figure 3 and Figure 4 As shown, the present invention provides a low-power auxiliary power supply 10, including: a high-frequency transformer 122; at least one auxiliary output circuit 102, wherein a first end 1022 of the auxiliary output circuit 102 is connected to a secondary side 1224 of the high-frequency transformer 122, and a second end 1024 of the auxiliary output circuit 102 has an output port 1026 for transmitting energy; the auxiliary output circuit 102 further includes: a general-purpose transistor 104, wherein an emitter of the general-purpose transistor 104 is connected to a first end 1028 of the output port 1026, and a collector of the general-purpose transistor 104 is connected to a first end 1232 of the secondary side 1224 of the high-frequency transformer 122; and a control circuit 106, wherein the control circuit 106 is connected to the base of the general-purpose transistor 104 and the secondary side 1224 of the high-frequency transformer 122, respectively, and is configured to control the general-purpose transistor 104 to be in a cut-off state when the system is operating in standby mode or a low-loss operating condition, thereby stopping the auxiliary output circuit 102 from transmitting energy.

[0057] The low-power auxiliary power supply 10 provided by the present invention primarily comprises: a high-frequency transformer 122, at least one auxiliary output circuit 102, and a control circuit 106. The number of auxiliary output circuits 102 may be multiple. A first end 1022 of the auxiliary output circuit 102 is connected to the secondary side 1224 of the high-frequency transformer 122. A second end 1024 of the auxiliary output circuit 102 has an output port 1026 for transmitting energy. The high-frequency transformer 122 has a primary side and a secondary side. The high-frequency transformer 122 transfers energy, transferring energy from the primary side to the secondary side via magnetic coupling. The secondary side then transfers the energy to the at least one auxiliary output circuit 102. The high-frequency transformer 122 also provides electrical isolation, ensuring that the input and output sides are not grounded. The secondary side includes multiple output windings, each connected to a respective auxiliary output circuit 102. Each auxiliary output circuit 102 has an output port 1026, which can be connected to a load and transfer energy to the load. The auxiliary output circuit 102 further includes a general-purpose transistor 104. The emitter of the general-purpose transistor 104 is connected to a first terminal 1028 of the output port 1026. The collector of the general-purpose transistor 104 is connected to a first terminal 1232 of the secondary side 1224 of the high-frequency transformer 122. The base of the general-purpose transistor 104 is connected to the control circuit 106. A second terminal 1234 of the secondary side 1224 of the high-frequency transformer 122 is connected to a second terminal 1030 of the output port 1026. When the general-purpose transistor 104 is in an on state, the auxiliary output circuit 102 can output energy through the output port 1026. When the general-purpose transistor 104 is in an off state, the auxiliary output port 1026 cannot output energy. The low-power auxiliary power supply 10 further includes a control circuit 106, wherein the control circuit 106 is respectively connected to the base of the universal transistor 104 and the secondary side 1224 of the high-frequency transformer 122. When the system is operating in standby mode or a low-loss operating condition, the control circuit 106 can turn the universal transistor 104 off, thereby stopping the auxiliary output circuit 102 from transmitting energy. The present invention provides a universal transistor 104 in the auxiliary output circuit 102 and connects the control circuit 106 to the base of the universal transistor 104 and the secondary side 1224 of the high-frequency transformer 122. Therefore, when the system is operating in standby mode or a low-loss operating condition, the control circuit 106 can control the universal transistor to be turned off, thereby disconnecting the auxiliary output circuit 102 and preventing the high-frequency transformer 122 from outputting energy, thereby reducing unnecessary system power consumption. The present invention controls the output of the auxiliary output circuit 102 according to the load demand and working mode of the system through the control circuit 106, thereby reducing unnecessary output power, improving the efficiency of the entire system, and also ensuring the stability of the power supply of the control system.

[0058] In some embodiments, optionally, as Figure 3 and Figure 4 As shown, the control circuit 106 includes: a switching transistor 1062, the collector of which is respectively connected to the first end 1232 of the secondary side 1224 of the high-frequency transformer 122 and the base of the universal transistor 104, and the emitter of the switching transistor 1062 is respectively connected to the second end 1234 of the secondary side 1224 of the high-frequency transformer 122 and the second end 1030 of the output port 1026; a controller 1064, which is connected to the base of the switching transistor 1062 and is used to output a high-level signal when the system operates in standby mode or low-loss working conditions, so that the switching transistor 1062 is in a conducting state, the universal transistor 104 is in a cut-off state, and the secondary output circuit 102 stops transmitting energy.

[0059] In this embodiment, the control circuit 106 includes a switching transistor 1062 and a controller 1064. The collector of the switching transistor 1062 is connected to the first terminal 1232 of the secondary side 1224 of the high-frequency transformer 122 and the base of the universal transistor 104, respectively. The emitter of the switching transistor 1062 is connected to the second terminal 1234 of the secondary side 1224 of the high-frequency transformer 122 and the second terminal 1030 of the output port 1026, respectively. When the system is working in standby mode or low loss condition, the controller 1064 will output a high level. Since the controller 1064 is connected to the base of the switching transistor 1062, the switching transistor 1062 will be in the on state. Furthermore, since the collector of the switching transistor 1062 is respectively connected to the base of the universal transistor 104 and the secondary side 1224 of the high frequency transformer 122, the emitter of the switching transistor 1062 is respectively connected to the secondary side 1224 of the high frequency transformer 122 and the output port 122. 1026 are connected, so when the switching transistor 1062 is turned on, the energy of the secondary side 1224 of the high-frequency transformer 122 will preferentially flow to the switching transistor 1062, and no longer flow to the base of the universal transistor 104, so that the universal transistor 104 is in a cut-off state, and then the auxiliary output circuit 102 is disconnected, and the auxiliary output circuit 102 cannot output energy, thereby achieving the technical effect of controlling the auxiliary output circuit 102 to be unable to output energy when the system operates in standby mode or low-loss working conditions.

[0060] In some embodiments, optionally, as Figure 4As shown, the low-power auxiliary power supply 10 further includes: a sampling resistor 108, the sampling resistor 108 is connected to the output port 1026, and is used to collect the voltage of the output port 1026; a voltage stabilizing circuit 110, a first end 1102 of the voltage stabilizing circuit 110 is connected to the sampling resistor 108, a second end 1104 of the voltage stabilizing circuit 110 is respectively connected to the first end 1232 of the secondary side 1224 of the high-frequency transformer 122 and the base of the universal transistor 104, and a third end 1106 of the voltage stabilizing circuit 110 is respectively connected to the high-frequency transformer The second end 1234 of the secondary side 1224 of 122 is connected to the second end 1030 of the output port 1026, wherein, when the voltage of the output port 1026 is greater than the preset voltage, the voltage stabilizing circuit 110 is in the on state, so that the universal transistor 104 is in the off state, and the auxiliary output circuit 102 stops transmitting energy; when the voltage of the output port 1026 is less than or equal to the preset voltage, the voltage stabilizing circuit 110 is in the off state, so that the universal transistor 104 is in the on state, and the auxiliary output circuit 102 transmits energy.

[0061] In this embodiment, the low-power auxiliary power supply 10 further includes a sampling resistor 108 and a voltage stabilizing circuit 110. The sampling resistor 108 is connected to the output port 1026 for sampling the voltage at the output port 1026. A first terminal 1102 of the voltage stabilizing circuit 110 is connected to the sampling resistor 108. A second terminal 1104 of the voltage stabilizing circuit 110 is connected to the second terminal 1234 of the secondary side 1224 of the high-frequency transformer 122 and the base of the universal transistor 104, respectively. A third terminal 1106 of the voltage stabilizing circuit 110 is connected to the second terminal 1234 of the secondary side 1224 of the high-frequency transformer 122 and the second terminal 1030 of the output port 1026, respectively. When the voltage at the output port 1026 is greater than a preset voltage, the voltage regulator circuit 110 is in an on state. Since the second terminal 1104 of the voltage regulator circuit 110 is connected to the secondary side 1224 of the high-frequency transformer 122, and the third terminal 1106 of the voltage regulator circuit 110 is also connected to the secondary side 1224 of the high-frequency transformer 122, when the voltage regulator circuit 110 is on, energy from the secondary side 1224 of the high-frequency transformer 122 preferentially flows to the voltage regulator circuit 110 rather than to the universal transistor 104. This causes the universal transistor 104 to be in an off state, thereby stopping the secondary output circuit 102 from transmitting energy. When the voltage at the output port 1026 is less than or equal to the preset voltage, the voltage regulator circuit 110 is in an off state, preventing energy from the high-frequency transformer 122 from passing through the voltage regulator circuit 110 and allowing it to flow only to the base of the universal transistor 104. This causes the universal transistor 104 to be in an on state, thereby enabling the secondary output circuit 102 to transmit energy. The present invention improves the stability and accuracy of the output voltage of the entire low-power auxiliary power supply 10 through closed-loop output feedback. It also significantly reduces the power consumption of the voltage stabilization circuit 110, avoids output voltage instability due to auxiliary power supply load fluctuations, and improves the accuracy and stability of the output voltage of the entire system. At the same time, the present invention also significantly reduces the cross-regulation rate of the low-power auxiliary power supply 10, so that the accuracy of each output voltage of the low-power auxiliary power supply 10 is relatively high and is not affected by load fluctuations. It achieves the adjustment of the output of the low-power auxiliary power supply 10 according to actual needs, thereby avoiding energy waste. It also reduces the process difficulty and coupling requirements of the windings in the high-frequency transformer 122 of the low-power auxiliary power supply 10, especially for low-power auxiliary power supplies 10 with multiple outputs.

[0062] In some embodiments, optionally, as Figures 3 to 5As shown, the auxiliary output circuit 102 includes: a first auxiliary output circuit 112 and a second auxiliary output circuit 114; the output port 1026 includes: a first output port 1122 and a second output port 1142; the secondary side 1224 of the high-frequency transformer 122 includes: a first secondary side 1226 of the high-frequency transformer 122 and a second secondary side 1228 of the high-frequency transformer 122; the first secondary side of the high-frequency transformer 122 is connected to the first auxiliary output circuit 112, and the first auxiliary output circuit 112 has a first output port 1122; the second secondary side 1228 of the high-frequency transformer 122 is connected to the second auxiliary output circuit 114, and the second auxiliary output circuit 114 has a second output port 1142; the second end 1238 of the first secondary side 1226 of the high-frequency transformer 122 is connected to the second end 1126 of the first output port 1122, and the second end 1242 of the second secondary side 1228 of the high-frequency transformer 122 is connected to the second end 1146 of the second output port 1142.

[0063] In this embodiment, the auxiliary output circuit 102 may include a first auxiliary output circuit 112 and a second auxiliary output circuit 114, and the output port 1026 may include a first output port 1122 and a second output port 1142. The first auxiliary output circuit 112 includes a first output port 1122, and the second auxiliary output circuit 114 includes a second output port 1142. The loads connected to the first auxiliary output port 1026 and the second output port 1142 may be the same or different. Furthermore, the secondary side 1224 of the high-frequency transformer 122 includes a first secondary side 1226 of the high-frequency transformer 122 and a second secondary side 1228 of the high-frequency transformer 122. In which, the first secondary side of the high-frequency transformer 122 is connected to the first secondary output circuit 112, and the second secondary side 1228 of the high-frequency transformer 122 is connected to the second secondary output circuit 114. Specifically, the second end 1238 of the first secondary side 1226 of the high-frequency transformer 122 is connected to the second end 1126 of the first output port 1122, and the second end 1242 of the second secondary side 1228 of the high-frequency transformer 122 is connected to the second end 1146 of the second output port 1142.

[0064] In some embodiments, optionally, as Figure 5As shown, the universal transistor 104 includes: a first transistor 124, the emitter of the first transistor 124 is connected to the first end 1124 of the first output port 1122, the collector of the first transistor 124 is connected to the first end 1236 of the first secondary side 1226 of the high-frequency transformer 122, and the base of the first transistor 124 is connected to the control circuit 106; a second transistor 126, the emitter of the second transistor 126 is connected to the first end 1144 of the second output port 1142, the collector of the first transistor 124 is connected to the first end 1240 of the second secondary side 1228 of the high-frequency transformer 122, and the base of the first transistor 124 is connected to the control circuit 106.

[0065] In this embodiment, the universal transistor 104 includes a first transistor 124 and a second transistor 126. The first transistor 124 is located in the first auxiliary output circuit 112, and the second transistor 126 is located in the second auxiliary output circuit 114. Specifically, the emitter of the first transistor 124 is connected to the first end 1124 of the first output port 1122, the collector of the first transistor 124 is connected to the first end 1236 of the first secondary side 1226 of the high-frequency transformer 122, and the base of the first transistor 124 is connected to the control circuit 106. When the system is operating in standby mode or low-loss operation, the control circuit 106 controls the first transistor 124 to be in a cut-off state, thereby causing the first auxiliary output circuit 112 to stop transmitting energy. The emitter of the second transistor 126 is connected to the first end 1144 of the second output port 1142, the collector of the first transistor 124 is connected to the first end 1240 of the second secondary side 1228 of the high-frequency transformer 122, and the base of the first transistor 124 is connected to the control circuit 106. When the system operates in standby mode or low-loss working condition, the control circuit 106 controls the second transistor 126 to be in the cut-off state, thereby causing the second auxiliary output circuit 114 to stop transmitting energy.

[0066] In some embodiments, optionally, as Figure 5As shown, the switching transistor 1062 includes: a third transistor 128, wherein the collector of the third transistor 128 is respectively connected to the first end 1236 of the first secondary side 1226 of the high-frequency transformer 122 and the base of the first transistor 124, the emitter of the third transistor 128 is respectively connected to the second end 1238 of the first secondary side 1226 of the high-frequency transformer 122 and the second end 1126 of the first output port 1122, and the base of the third transistor 128 is connected to the controller 1064; and a fourth transistor 130, wherein the collector of the fourth transistor is respectively connected to the first end 1240 of the second secondary side 1228 of the high-frequency transformer 122 and the base of the second transistor 126, the emitter of the fourth transistor 130 is respectively connected to the second end 1242 of the second secondary side 1228 of the high-frequency transformer 122 and the second end 1146 of the second output port 1142, and the base of the fourth transistor 130 is connected to the controller 1064.

[0067] In this embodiment, the switching transistor 1062 includes: a third transistor 128 and a fourth transistor 130. The third transistor 128 is connected to the first auxiliary output circuit 112, and the fourth transistor 130 is connected to the second auxiliary output circuit 114. Specifically, the collector of the third transistor 128 is respectively connected to the first end 1236 of the first secondary side 1226 of the high-frequency transformer 122 and the base of the first transistor 124, the emitter of the third transistor 128 is respectively connected to the second end 1238 of the first secondary side 1226 of the high-frequency transformer 122 and the second end 1126 of the first output port 1122, and the base of the third transistor 128 is connected to the controller 1064. When the system is operating in standby mode or low-loss working conditions, the controller 1064 is connected. The controller 1064 outputs a high level. Since the base of the third transistor 128 is connected to the controller 1064, the third transistor 128 is in the on state. Since the collector of the third transistor 128 is connected to the secondary side 1224 of the high-frequency transformer 122, the energy of the high-frequency transformer 122 flows to the third transistor 128 and does not flow to the base of the first transistor 124, so that the first transistor 124 is in the off state, and the first auxiliary output circuit 112 stops outputting energy. The collector of the fourth transistor is connected to the first end 1240 of the second secondary side 1228 of the high-frequency transformer 122 and the base of the second transistor 126, respectively. The emitter of the fourth transistor 130 is connected to the second end 1242 of the second secondary side 1228 of the high-frequency transformer 122 and the second end 1146 of the second output port 1142, respectively. The base of the fourth transistor 130 is connected to the controller 1064. When the system is operating in standby mode or a low-loss operating state, the controller 1064 outputs a high level. Since the base of the fourth transistor 130 is connected to the controller 1064, the fourth transistor 130 is in an on state. Since the collector of the fourth transistor 130 is connected to the secondary side 1224 of the high-frequency transformer 122, energy from the high-frequency transformer 122 flows to the fourth transistor 130 and does not flow to the base of the second transistor 126, causing the second transistor 126 to be in an off state, thereby causing the second auxiliary output circuit 114 to stop outputting energy.

[0068] In some embodiments, optionally, as Figure 5 As shown, the control circuit 106 also includes: a first resistor 132, the first end of the first resistor 132 is connected to the base of the third transistor 128, and the second end of the first resistor 132 is connected to the controller 1064; a second resistor 134, the first end of the second resistor 134 is connected to the base of the fourth transistor 130, and the second end of the second resistor 134 is connected to the controller 1064.

[0069] In this embodiment, the control circuit 106 further includes a first resistor 132 and a second resistor 134. A first end of the first resistor 132 is connected to the base of the third transistor 128, and a second end of the first resistor 132 is connected to the controller 1064. In other words, the first resistor 132 is connected in series between the base of the third transistor 128 and the controller 1064, thereby protecting the third transistor 128. A first end of the second resistor 134 is connected to the base of the fourth transistor 130, and a second end of the second resistor 134 is connected to the controller 1064. In other words, the second resistor 134 is connected in series between the fourth transistor 130 and the controller 1064, thereby protecting the fourth transistor.

[0070] In some embodiments, optionally, as Figure 5 As shown, the sampling resistor 108 includes: a third resistor 136, wherein a first end of the third resistor 136 is connected to the emitter of the first transistor 124 and the first end 1124 of the first output port 1122, respectively; a fourth resistor 138, wherein a first end of the fourth resistor 138 is connected to the second end of the third resistor 136, and a second end of the fourth resistor 138 is connected to the second end 1126 of the first output port 1122 and the secondary side 1224 of the high-frequency transformer 122, respectively; a fifth resistor 140, wherein a first end of the fifth resistor 140 is connected to the emitter of the second transistor 126 and the first end 1144 of the second output port 1142, respectively; and a sixth resistor 142, wherein a first end of the sixth resistor 142 is connected to the second end of the fifth resistor 140, and a second end of the sixth resistor 142 is connected to the second end 1146 of the second output port 1142 and the secondary side 1224 of the high-frequency transformer 122, respectively.

[0071] In this embodiment, the sampling resistor 108 includes a third resistor 136, a fourth resistor 138, a fifth resistor 140, and a sixth resistor 142. A first end of the third resistor 136 is connected to the emitter of the first transistor 124 and the first end 1124 of the first output port 1122, respectively. A second end of the third resistor 136 is connected to the first end of the fourth resistor 138. A second end of the fourth resistor 138 is connected to the second end 1126 of the first output port 1122 and the secondary side 1224 of the high-frequency transformer 122, respectively. In other words, the third resistor 136 and the fourth resistor 138 are connected in series, and then the series-connected third and fourth resistors 136 and 138 are connected in parallel to the first output port 1122. Thus, the voltage of the first output port 1122 can be determined based on the voltages of the third resistor 136 and the fourth resistor 138, thereby achieving sampling of the voltage of the first output port 1122. The first end of the fifth resistor 140 is respectively connected to the emitter of the second transistor 126 and the first end 1144 of the second output port 1142; the second end of the fifth resistor 140 is connected to the first end of the sixth resistor 142, and the second end of the sixth resistor 142 is respectively connected to the second end 1146 of the second output port 1142 and the secondary side 1224 of the high-frequency transformer 122. That is, the fifth resistor 140 and the sixth resistor 142 are connected in series, and then the fifth resistor 140 and the sixth resistor 142 in series are connected in parallel with the second output port 1142, so that the voltage of the second output port 1142 can be determined according to the voltages of the fifth resistor 140 and the sixth resistor 142, thereby realizing sampling of the voltage of the second output port 1142.

[0072] In some embodiments, optionally, as Figure 5 As shown, the voltage stabilization circuit 110 includes: a first linear regulator 144, wherein a first pin of the first linear regulator 144 is respectively connected to the base of the first transistor 124 and the first end 1236 of the first secondary side 1226 of the high-frequency transformer 122, a second pin of the first linear regulator 144 is respectively connected to the second end 1238 of the first secondary side 1226 of the high-frequency transformer 122 and the second end 1126 of the first output port 1122, and a third pin of the first linear regulator 144 is respectively connected to the third resistor 136 and the fourth resistor 138. When the voltage of the first output port 1122 is greater than a preset voltage, the first linear regulator 144 is in an on state; when the voltage of the first output port 1122 is less than or equal to the preset voltage, the first linear regulator 144 is in an off state.

[0073] In this embodiment, the voltage stabilizing circuit 110 includes: a first linear voltage regulator 144. The first pin of the first linear voltage regulator 144 may be the second end 1104 of the voltage stabilizing circuit 110, which is respectively connected to the base of the first transistor 124 and the first end 1236 of the first secondary side 1226 of the high-frequency transformer 122. The second pin of the first linear voltage regulator 144 may be the third end 1106 of the voltage stabilizing circuit 110, which is respectively connected to the second end 1238 of the first secondary side 1226 of the high-frequency transformer 122 and the second end 1126 of the first output port 1122. The third pin of the first linear voltage regulator 144 may be the first end 1102 of the voltage stabilizing circuit 110, which is respectively connected to the third resistor 136 and the fourth resistor 138. Specifically, the third pin of the first linear voltage regulator 144 is an input pin, which may be connected to the center of the process between the third resistor 136 and the fourth resistor 138. The third resistor 136 and the fourth resistor 138 are connected. The voltage of the first output port 1122 sampled by the fourth resistor 138 can be input into the first linear regulator 144 through the third pin. In the first linear regulator 144, when the voltage of the first output port 1122 is greater than a preset voltage, the first linear regulator 144 is in an on state. Since the first pin of the first linear regulator 144 is connected to the first end 1236 of the first secondary side 1226 of the high-frequency transformer 122, and the second pin of the first linear regulator 144 is connected to the second end 1238 of the first secondary side 1226 of the high-frequency transformer 122, when the first linear regulator 144 is turned on, the energy of the high-frequency transformer 122 is transmitted through the first linear regulator 144 and no longer flows to the first transistor 124, thereby causing the first transistor 124 to be in an off state, thereby causing the first secondary output circuit 112 to stop transmitting energy. When the voltage of the first output port 1122 is less than or equal to the preset voltage, the first linear regulator 144 is in the cut-off state, so that energy flows to the base of the first transistor 124, thereby turning on the first transistor 124 and enabling the first auxiliary output circuit 112 to transmit energy.

[0074] In some embodiments, optionally, as Figure 5As shown, the voltage stabilization circuit 110 includes: a second linear regulator 146, wherein a first pin of the second linear regulator 146 is respectively connected to the base of the second transistor 126 and the first end 1240 of the second secondary side 1228 of the high-frequency transformer 122, a second pin of the second linear regulator 146 is respectively connected to the second end 1242 of the second secondary side 1228 of the high-frequency transformer 122 and the second end 1146 of the second output port 1142, and a third pin of the second linear regulator 146 is respectively connected to the fifth resistor 140 and the sixth resistor 142. When the voltage of the second output port 1142 is greater than a preset voltage, the second linear regulator 146 is in an on state; when the voltage of the second output port 1142 is less than or equal to the preset voltage, the second linear regulator 146 is in an off state.

[0075] In this embodiment, the voltage stabilizing circuit 110 includes: a second linear voltage regulator 146. The first pin of the second linear voltage regulator 146 may be the second end 1104 of the voltage stabilizing circuit 110, which is respectively connected to the base of the second transistor 126 and the first end 1240 of the second secondary side 1228 of the high-frequency transformer 122. The second pin of the second linear voltage regulator 146 may be the third end 1106 of the voltage stabilizing circuit 110, which is respectively connected to the second end 1242 of the second secondary side 1228 of the high-frequency transformer 122 and the second end 1146 of the second output port 1142. The third pin of the second linear voltage regulator 146 may be the first end 1102 of the voltage stabilizing circuit 110, which is respectively connected to the fifth resistor 140 and the sixth resistor 142. Specifically, the third pin of the second linear voltage regulator 146 is an input pin, which may be connected to the center of the processing between the fifth resistor 140 and the sixth resistor 142. The fifth resistor 140 and the sixth resistor 142 are connected. The voltage of the second output port 1142 sampled by the six resistors 142 can be input into the second linear regulator 146 via the third pin. In the second linear regulator 146, when the voltage of the second output port 1142 is greater than a preset voltage, the second linear regulator 146 is in an on state. Since the first pin of the second linear regulator 146 is connected to the first end 1240 of the second secondary side 1228 of the high-frequency transformer 122, and the second pin of the second linear regulator 146 is connected to the second end 1242 of the second secondary side 1228 of the high-frequency transformer 122, when the second linear regulator 146 is in an on state, the energy of the high-frequency transformer 122 is transmitted through the second linear regulator 146 instead of flowing to the second transistor 126, thereby causing the second transistor 126 to be in an off state, thereby stopping the second auxiliary output circuit 114 from transmitting energy. When the voltage of the second output port 1142 is less than or equal to the preset voltage, the second linear regulator 146 is in the cut-off state, so that energy flows to the base of the second transistor 126, thereby turning on the second transistor 126 and enabling the second auxiliary output circuit 114 to transmit energy.

[0076] In some embodiments, optionally, as Figure 5 As shown, the low-power auxiliary power supply 10 further includes: a seventh resistor 148, a first end of the seventh resistor 148 is connected to the first end 1236 of the first secondary side 1226 of the high-frequency transformer 122, and a second end of the seventh resistor 148 is respectively connected to the collector of the third transistor 128, the first pin of the first linear regulator 144, and the base of the first transistor 124, for protecting the first transistor 124, the third transistor 128, and the first linear regulator 144.

[0077] In this embodiment, the low-power auxiliary power supply 10 further includes a seventh resistor 148. A first end of the seventh resistor 148 is connected to the first end 1236 of the first secondary side 1226 of the high-frequency transformer 122, and a second end of the seventh resistor 148 is connected to the collector of the third transistor 128, the first pin of the first linear regulator 144, and the base of the first transistor 124, respectively. In other words, the seventh resistor 148 is connected in series between the first end 1236 of the first secondary side 1226 of the high-frequency transformer 122 and the base of the first transistor 124. When the high-frequency transformer 122 transfers energy to the base of the first transistor 124, the seventh resistor 148 protects the first transistor 124. The seventh resistor 148 is also connected in series between the first end 1236 of the first secondary side 1226 of the high-frequency transformer 122 and the collector of the third transistor 128. When the third transistor 128 is turned on, the high-frequency transformer 122 transfers energy to the collector of the third transistor 128, and the seventh resistor 148 protects the third transistor 128. The seventh resistor 148 is also connected in series between the first end 1236 of the first secondary side 1226 of the high-frequency transformer 122 and the first pin of the first linear regulator 144. When the first linear regulator 144 is turned on, the high-frequency transformer 122 transfers energy to the first linear regulator 144, and the seventh resistor 148 protects the first linear regulator 144.

[0078] In some embodiments, optionally, as Figure 5 As shown, the low-power auxiliary power supply 10 further includes: an eighth resistor 150, a first end of the eighth resistor 150 being connected to the first end 1240 of the second secondary side 1228 of the high-frequency transformer 122, and a second end of the eighth resistor 150 being respectively connected to the collector of the fourth transistor 130, the first pin of the second linear regulator 146, and the base of the second transistor 126, for protecting the second transistor 126, the fourth transistor 130, and the second linear regulator 146.

[0079] In this embodiment, the low-power auxiliary power supply 10 further includes an eighth resistor 150. A first end of the eighth resistor 150 is connected to a first end 1240 of the second secondary side 1228 of the high-frequency transformer 122, and a second end of the eighth resistor 150 is connected to the collector of the fourth transistor 130, the first pin of the second linear regulator 146, and the base of the second transistor 126, respectively. In other words, the eighth resistor 150 is connected in series between the first end 1240 of the second secondary side 1228 of the high-frequency transformer 122 and the base of the second transistor 126. When the high-frequency transformer 122 transfers energy to the base of the second transistor 126, the eighth resistor 150 protects the second transistor 126. The eighth resistor 150 is also connected in series between the first end 1240 of the second secondary side 1228 of the high-frequency transformer 122 and the collector of the fourth transistor 130. When the fourth transistor 130 is turned on, the high-frequency transformer 122 transfers energy to the collector of the fourth transistor 130, and the eighth resistor 150 protects the fourth transistor 130. The eighth resistor 150 is also connected in series between the first end 1240 of the second secondary side 1228 of the high-frequency transformer 122 and the first pin of the second linear regulator 146. When the second linear regulator 146 is turned on, the high-frequency transformer 122 transfers energy to the second linear regulator 146, and the eighth resistor 150 protects the second linear regulator 146.

[0080] In some embodiments, optionally, as Figure 5 As shown, the first secondary output circuit 112 also includes: a first output rectifier tube 152, the anode of the first output rectifier tube 152 is connected to the first end 1236 of the first secondary side 1226 of the high-frequency transformer 122, and the cathode of the first output rectifier tube 152 is respectively connected to the collector of the first transistor 124 and the first end of the seventh resistor 148, for rectifying the pulse energy output by the high-frequency transformer 122 into DC energy.

[0081] In this embodiment, the first secondary output circuit 112 further includes a first output rectifier 152. The anode of the first output rectifier 152 is connected to the first end 1236 of the first secondary side 1226 of the high-frequency transformer 122, and the cathode of the first output rectifier 152 is connected to the collector of the first transistor 124 and the first end of the seventh resistor 148, respectively. The first output rectifier 152 is capable of rectifying the pulse energy output by the high-frequency transformer 122 into DC energy. Furthermore, since energy can only flow from the anode of the first output rectifier 152 to the cathode of the first output rectifier 152, providing the first output rectifier 152 between the first secondary side 1226 of the high-frequency transformer 122 and the first transistor 124 can prevent energy backflow.

[0082] In some embodiments, optionally, as Figure 5As shown, the second auxiliary output circuit 114 also includes: a second output rectifier tube 154, the anode of the second output rectifier tube 154 is connected to the first end 1240 of the second secondary side 1228 of the high-frequency transformer 122, and the cathode of the second output rectifier tube 154 is respectively connected to the collector of the second transistor 126 and the first end of the eighth resistor 150, for rectifying the pulse energy output by the high-frequency transformer 122 into DC energy.

[0083] In this embodiment, Figure 5 As shown, the second secondary output circuit 114 further includes a second output rectifier 154. The anode of the second output rectifier 154 is connected to the first end 1240 of the second secondary side 1228 of the high-frequency transformer 122, and the cathode of the second output rectifier 154 is connected to the collector of the second triode 126 and the first end of the eighth resistor 150, respectively. The second output rectifier 154 is capable of rectifying the pulse energy output by the high-frequency transformer 122 into DC energy. Furthermore, since energy can only flow from the anode of the second output rectifier 154 to the cathode of the second output rectifier 154, providing the second output rectifier 154 between the second secondary side 1228 of the high-frequency transformer 122 and the second triode 126 can prevent energy backflow.

[0084] In some embodiments, optionally, as Figures 3 to 5 As shown, the low-power auxiliary power supply 10 also includes: a high-frequency switching tube 156, the first end 1162 of the high-frequency switching tube 156 is connected to the input circuit 120, and the second end 1164 of the high-frequency switching tube 156 is connected to the primary side 1222 of the high-frequency transformer 122, which is used to convert the DC energy input by the input circuit 120 into pulse energy; a first capacitor 158, the first capacitor 158 is connected in parallel with the input circuit 120, and is used for filtering.

[0085] In this embodiment, the low-power auxiliary power supply 10 further includes a high-frequency switching tube 156 and a first capacitor 158. The first end 1162 of the high-frequency switching tube 156 is connected to the input circuit 120, and the second end 1164 of the high-frequency switching tube 156 is connected to the primary side 1222 of the high-frequency transformer 122. The high-frequency switching tube 156 can convert the DC energy input by the input circuit 120 into pulse energy and transmit it to the high-frequency transformer 122. The input circuit 120 can be a power supply circuit such as a battery, an inverter bus, a DC source, or a photovoltaic module. The first capacitor 158 is connected in parallel with the input circuit 120 to filter out high-frequency switching ripple and improve EMC (Electro Magnetic Compatibility) performance.

[0086] In some embodiments, optionally, as Figures 3 to 5As shown, the low-power auxiliary power supply 10 also includes: a main output circuit 118, a first end 1182 of the main output circuit 118 is connected to the third secondary side 1230 of the high-frequency transformer 122, and a second end 1184 of the main output circuit 118 has a third output port 1186, and the third output port 1186 is used to transmit energy; the main output circuit 118 includes: a third output rectifier tube 160, an anode of the third output rectifier tube 160 is connected to the first end 1244 of the third secondary side 1230 of the high-frequency transformer 122, a cathode of the third output rectifier tube 160 is connected to the first end 1188 of the third output port 1186, and a second end 1246 of the third secondary side 1230 of the high-frequency transformer 122 is connected to the second end 1190 of the third output port 1186, for rectifying the pulse energy output by the high-frequency transformer 122 into DC energy.

[0087] In this embodiment, the low-power auxiliary power supply 10 further includes a main output circuit 118. A first terminal 1182 of the main output circuit 118 is connected to the third secondary side 1230 of the high-frequency transformer 122. A second terminal 1184 of the main output circuit 118 has a third output port 1186 capable of transmitting energy. The low-power auxiliary power supply 10 primarily transmits energy through the main output circuit 118. The main output circuit 118 serves as the primary feedback output of the low-power auxiliary power supply 10 and has high voltage accuracy. Furthermore, the main output circuit 118 includes a third output rectifier 160. The anode of the third output rectifier 160 is connected to the first terminal 1244 of the third secondary side 1230 of the high-frequency transformer 122, and the cathode of the third output rectifier 160 is connected to the first terminal 1188 of the third output port 1186. The third output rectifier 160 is capable of rectifying the pulsed energy output by the high-frequency transformer 122 into DC energy, which is then transmitted to the third output port 1186.

[0088] Further, if Figure 5 As shown, main output circuit 118 further includes a second capacitor 162 connected in parallel with third output port 1186 to filter high-frequency switching ripple and stabilize the output voltage. Furthermore, when third output rectifier 160 is in the off state, second capacitor 162 can also provide energy to the load through third output port 1186.

[0089] Further, if Figure 5 As shown, the first auxiliary output circuit 112 further includes a third capacitor 164, which is connected in parallel with the first output port 1122 to filter out high-frequency switching ripple and stabilize the output voltage. Furthermore, when the first output rectifier 152 is in the off state, the third capacitor 164 can also provide energy to the load through the first output port 1122.

[0090] Further, if Figure 5 As shown, the second auxiliary output circuit 114 further includes a fourth capacitor 166 , which is connected in parallel with the second output port 1142 to filter out high-frequency switching ripple and stabilize the output voltage. Furthermore, when the second output rectifier 154 is in the off state, the fourth capacitor 166 can also provide energy to the load through the second output port 1142 .

[0091] For example, the input voltage of the low-power auxiliary power supply 10 is 300V, and the preset voltages of the first output port 1122, the second output port 1142, and the third output port 1186 are 12V. When the input circuit 120 has an input voltage, the control chip of the low-power auxiliary power supply 10 starts operating, issuing a drive signal to drive the high-frequency switch 156. When the high-frequency switch 156 is turned on, the high-frequency transformer 122 stores energy, the first output rectifier 152, the second output rectifier 154, and the third output rectifier 160 are in the off state, and the first transistor 124 and the second transistor 126 are in the on state. At this time, the second capacitor 162, the third capacitor 164, and the fourth capacitor 166 respectively provide energy to the corresponding load. When the high-frequency switch tube 156 is in the cut-off state, the high-frequency transformer 122 releases energy, the first output rectifier tube 152, the second output rectifier tube 154 and the third output rectifier tube 160 are in the on state, the second capacitor 162, the third capacitor 164 and the fourth capacitor 166 are charged, and the output winding of the high-frequency transformer 122 supplies power to the load.

[0092] When the voltage at the first output port 1122 and the second output port 1142 is less than 12V, the first linear regulator 144 and the second linear regulator 146 are in the off state, the first transistor 124 and the second transistor 126 are in the on state, and the corresponding output winding can transfer energy to the third capacitor 164, the fourth capacitor 166, and the load. When the voltage at the first output port 1122 and the second output port 1142 is greater than 12V, the first linear regulator 144 and the second linear regulator 146 are in the on state, the first transistor 124 and the second transistor 126 are in the off state, and the corresponding output winding cannot transfer energy to the third capacitor 164, the fourth capacitor 166, and the load. When the system is in standby state or low power mode, the control signal sent by the controller 1064 is at a high level, the third transistor 128 and the fourth transistor 130 are turned on, the first transistor 124 and the second transistor 126 are turned off, and the corresponding output winding cannot transfer energy to the third capacitor 164, the fourth capacitor 166 and the load, thereby reducing the power consumption of the entire system.

[0093] like Figure 6As shown, the present invention proposes an energy storage battery system 20, wherein the energy storage battery system 20 includes: a low-power auxiliary power supply 10 as in any of the above embodiments.

[0094] The energy storage battery system 20 provided by the present invention mainly includes: the low-power auxiliary power supply 10 as in any of the above embodiments. Therefore, it has the technical effects of any of the above embodiments of the first aspect, which will not be described in detail here.

[0095] In this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance, unless otherwise expressly specified or limited. Terms such as "connect," "install," and "fix" should be interpreted broadly. For example, "connect" can refer to a fixed connection, a detachable connection, or an integral connection; and can be directly connected or indirectly connected through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0096] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0097] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A low-power auxiliary power supply, characterized in that: include: High frequency transformer; at least one auxiliary output circuit, wherein a first end of the auxiliary output circuit is connected to the secondary side of the high-frequency transformer, and a second end of the auxiliary output circuit has an output port, and the output port is used to transmit energy; The auxiliary output circuit further includes: a universal triode, wherein the emitter of the universal triode is connected to the first end of the output port, and the collector of the universal triode is connected to the first end of the secondary side of the high-frequency transformer; A control circuit is connected to the base of the universal transistor and the secondary side of the high-frequency transformer respectively, and is used to control the universal transistor to be in a cut-off state when the system operates in standby mode or low-loss working condition, so that the secondary output circuit stops transmitting energy.

2. The low-power auxiliary power supply according to claim 1, characterized in that: The control circuit comprises: a switching transistor, wherein the collector of the switching transistor is respectively connected to the first end of the secondary side of the high-frequency transformer and the base of the universal transistor, and the emitter of the switching transistor is respectively connected to the second end of the secondary side of the high-frequency transformer and the second end of the output port; A controller is connected to the base of the switching transistor and is used to output a high-level signal when the system operates in standby mode or low-loss working condition to turn on the switching transistor, turn off the universal transistor, and stop the auxiliary output circuit from transmitting energy.

3. The low-power auxiliary power supply according to claim 2, characterized in that: The low-power auxiliary power supply also includes: a sampling resistor, the sampling resistor being connected to the output port and being used to collect the voltage of the output port; A voltage stabilizing circuit, wherein a first end of the voltage stabilizing circuit is connected to the sampling resistor, a second end of the voltage stabilizing circuit is respectively connected to the first end of the secondary side of the high-frequency transformer and the base of the universal transistor, and a third end of the voltage stabilizing circuit is respectively connected to the second end of the secondary side of the high-frequency transformer and the second end of the output port, wherein when the voltage of the output port is greater than a preset voltage, the voltage stabilizing circuit is in an on state, so that the universal transistor is in an off state, and the auxiliary output circuit stops transmitting energy; when the voltage of the output port is less than or equal to the preset voltage, the voltage stabilizing circuit is in an off state, so that the universal transistor is in a on state, and the auxiliary output circuit transmits energy.

4. The low-power auxiliary power supply according to claim 3, characterized in that: The auxiliary output circuit includes: a first auxiliary output circuit and a second auxiliary output circuit; The output port includes: a first output port and a second output port; The secondary side of the high-frequency transformer includes: a first secondary side of the high-frequency transformer and a second secondary side of the high-frequency transformer; The first secondary side of the high-frequency transformer is connected to the first secondary output circuit, which has a first output port; the second secondary side of the high-frequency transformer is connected to the second secondary output circuit, which has a second output port; the second end of the first secondary side of the high-frequency transformer is connected to the second end of the first output port, and the second end of the second secondary side of the high-frequency transformer is connected to the second end of the second output port.

5. The low-power auxiliary power supply according to claim 4, characterized in that: The universal triode comprises: a first transistor, wherein an emitter of the first transistor is connected to a first end of the first output port, a collector of the first transistor is connected to a first end of a first secondary side of the high-frequency transformer, and a base of the first transistor is connected to the control circuit; a second transistor, wherein the emitter of the second transistor is connected to the first end of the second output port, the collector of the first transistor is connected to the first end of the second secondary side of the high-frequency transformer, and the base of the first transistor is connected to the control circuit.

6. The low-power auxiliary power supply according to claim 5, characterized in that: The switching transistor comprises: a third transistor, wherein the collector of the third transistor is respectively connected to the first end of the first secondary side of the high-frequency transformer and the base of the first transistor, the emitter of the third transistor is respectively connected to the second end of the first secondary side of the high-frequency transformer and the second end of the first output port, and the base of the third transistor is connected to the controller; a fourth transistor, wherein the collector of the fourth transistor is respectively connected to the first end of the second secondary side of the high-frequency transformer and the base of the second transistor, the emitter of the fourth transistor is respectively connected to the second end of the second secondary side of the high-frequency transformer and the second end of the second output port, and the base of the fourth transistor is connected to the controller.

7. The low-power auxiliary power supply according to claim 6, characterized in that: The control circuit further includes: a first resistor, wherein a first end of the first resistor is connected to the base of the third transistor, and a second end of the first resistor is connected to the controller; A second resistor, wherein a first end of the second resistor is connected to the base of the fourth transistor, and a second end of the second resistor is connected to the controller.

8. The low-power auxiliary power supply according to claim 7, characterized in that: The sampling resistor includes: a third resistor, wherein a first end of the third resistor is respectively connected to the emitter of the first transistor and the first end of the first output port; a fourth resistor, wherein a first end of the fourth resistor is connected to the second end of the third resistor, and a second end of the fourth resistor is respectively connected to the second end of the first output port and the secondary side of the high-frequency transformer; a fifth resistor, wherein a first end of the fifth resistor is respectively connected to the emitter of the second transistor and the first end of the second output port; a sixth resistor, wherein a first end of the sixth resistor is connected to the second end of the fifth resistor, and a second end of the sixth resistor is respectively connected to the second end of the second output port and the secondary side of the high-frequency transformer.

9. The low-power auxiliary power supply according to claim 8, characterized in that: The voltage stabilizing circuit comprises: A first linear regulator, wherein a first pin of the first linear regulator is respectively connected to the base of the first transistor and the first end of the first secondary side of the high-frequency transformer, a second pin of the first linear regulator is respectively connected to the second end of the first secondary side of the high-frequency transformer and the second end of the first output port, and a third pin of the first linear regulator is respectively connected to the third resistor and the fourth resistor. When the voltage of the first output port is greater than a preset voltage, the first linear regulator is in an on state; when the voltage of the first output port is less than or equal to the preset voltage, the first linear regulator is in an off state.

10. The low-power auxiliary power supply according to claim 8, characterized in that: The voltage stabilizing circuit comprises: A second linear regulator, wherein a first pin of the second linear regulator is respectively connected to the base of the second transistor and the first end of the second secondary side of the high-frequency transformer, a second pin of the second linear regulator is respectively connected to the second end of the second secondary side of the high-frequency transformer and the second end of the second output port, and a third pin of the second linear regulator is respectively connected to the fifth resistor and the sixth resistor. When the voltage of the second output port is greater than a preset voltage, the second linear regulator is in an on state; when the voltage of the second output port is less than or equal to the preset voltage, the second linear regulator is in an off state.

11. The low-power auxiliary power supply according to claim 9, characterized in that: The low-power auxiliary power supply also includes: a seventh resistor, wherein a first end of the seventh resistor is connected to the first end of the first secondary side of the high-frequency transformer, and a second end of the seventh resistor is respectively connected to the collector of the third transistor, the first pin of the first linear regulator, and the base of the first transistor, for protecting the first transistor, the third transistor, and the first linear regulator.

12. The low-power auxiliary power supply according to claim 10, characterized in that: The low-power auxiliary power supply also includes: an eighth resistor, wherein a first end of the eighth resistor is connected to the first end of the second secondary side of the high-frequency transformer, and a second end of the eighth resistor is respectively connected to the collector of the fourth transistor, the first pin of the second linear regulator, and the base of the second transistor, for protecting the second transistor, the fourth transistor, and the second linear regulator.

13. The low-power auxiliary power supply according to claim 11, characterized in that: The first secondary output circuit further includes: A first output rectifier tube, wherein the anode of the first output rectifier tube is connected to the first end of the first secondary side of the high-frequency transformer, and the cathode of the first output rectifier tube is respectively connected to the collector of the first transistor and the first end of the seventh resistor, and is used to rectify the pulse energy output by the high-frequency transformer into DC energy.

14. The low-power auxiliary power supply according to claim 12, characterized in that: The second secondary output circuit further includes: A second output rectifier tube, the anode of the second output rectifier tube is connected to the first end of the second secondary side of the high-frequency transformer, and the cathode of the second output rectifier tube is respectively connected to the collector of the second transistor and the first end of the eighth resistor, and is used to rectify the pulse energy output by the high-frequency transformer into DC energy.

15. The low-power auxiliary power supply according to any one of claims 1 to 14, characterized in that: The low-power auxiliary power supply also includes: a high-frequency switching tube, wherein a first end of the high-frequency switching tube is connected to the input circuit, and a second end of the high-frequency switching tube is connected to the primary side of the high-frequency transformer, and is used to convert the DC energy input by the input circuit into pulse energy; A first capacitor is connected in parallel with the input circuit and is used for filtering.

16. The low-power auxiliary power supply according to any one of claims 1 to 14, characterized in that: The low-power auxiliary power supply also includes: a main output circuit, wherein a first end of the main output circuit is connected to the third secondary side of the high-frequency transformer, a second end of the main output circuit has a third output port, and the third output port is used to transmit energy; The main output circuit includes: A third output rectifier tube, wherein the anode of the third output rectifier tube is connected to the first end of the third secondary side of the high-frequency transformer, the cathode of the third output rectifier tube is connected to the first end of the third output port, and the second end of the third secondary side of the high-frequency transformer is connected to the second end of the third output port, and is used to rectify the pulse energy output by the high-frequency transformer into DC energy.

17. An energy storage battery system, characterized in that: The energy storage battery system comprises: A low-power auxiliary power supply according to any one of claims 1 to 16.

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