Ultra-wide voltage input power supply system

Abstract

The invention discloses an ultra-wide voltage input power supply system. The enabling end of a flyback power supply control unit in the ultra-wide voltage input power supply system is electrically connected with the output end of a starting control unit, and the output end of the flyback power supply control unit is electrically connected with the first input end of an isolation transformer unit. The output end of the isolation transformer unit is electrically connected with the output unit, the output unit is electrically connected with the input end of the battery management unit, and the output end of the battery management unit is electrically connected with the control end of the starting control unit. The starting control unit is used for enabling the flyback power supply control unit to be continuously started according to a first control signal output by the battery management unit and controlling the flyback power supply control unit to be closed according to a second control signal output by the battery management unit. Thus, the starting control unit can control the flyback control unit to keep starting or automatically shut down according to the battery management unit, zero power consumption is achieved, and damage caused by overdischarge of the battery is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power supply circuit, and particularly relates to a super-wide voltage input power supply system. BACKGROUND

[0002] The input voltage of an isolated power supply is generally DC 100V-400V or AC 120V-245V, and the input voltage of a small high-voltage household storage system is very different (tens of volts to thousands of volts) due to different numbers of battery modules, and the control system generally only needs low voltages such as DC 12V, 5V and 3.3V. The control system in the prior art has no low-power mode, and starting and stopping are manually executed, which is prone to cause damage due to over-discharge of the battery. SUMMARY

[0003] The embodiment of the present application provides a super-wide voltage input power supply system, a starting control unit is arranged to control a flyback control unit to keep open or automatically shut down according to a battery management unit, zero power consumption is realized, and damage due to over-discharge of the battery is avoided.

[0004] In a first aspect, the embodiment of the present application provides a super-wide voltage input power supply system, which comprises:

[0005] The super-wide voltage input power supply system comprises a starting control unit, a flyback power supply control unit, an isolation transformer unit, an output unit and a battery management unit;

[0006] The enable end of the flyback power supply control unit is electrically connected with the output end of the starting control unit, and the output end of the flyback power supply control unit is electrically connected with the first input end of the isolation transformer unit;

[0007] The output end of the isolation transformer unit is electrically connected with the output unit, the output unit is electrically connected with the input end of the battery management unit, and the output end of the battery management unit is electrically connected with the control end of the starting control unit;

[0008] The starting control unit is used for continuously opening the flyback power supply control unit according to a first control signal output by the battery management unit, and closing the flyback power supply control unit according to a second control signal output by the battery management unit.

[0009] Optionally, the starting control unit comprises a first switch control circuit and a second switch control circuit.

[0010] The first switch control circuit is electrically connected with the enable end of the flyback power supply control unit and is used for controlling the flyback power supply control unit to open.

[0011] The second switch control circuit is electrically connected with the battery management unit and the flyback power supply control unit, and is configured to keep the flyback power supply control unit in an open state according to a first control signal output by the battery management unit, and control the flyback power supply control unit to be closed according to a second control signal output by the battery management unit.

[0012] Optionally, the first switch control unit comprises a touch switch and a first diode.

[0013] The second switch control circuit comprises a first triode, a first optocoupler, a first voltage stabilizing diode, a second voltage stabilizing diode and a first transistor.

[0014] The output end of the battery management unit is electrically connected with the control end of the first triode, the first pole of the first triode is electrically connected with the ground end, the second pole of the first triode is electrically connected with the second end of the first optocoupler, the first end of the first optocoupler is coupled with a first voltage end, the third end of the first optocoupler is electrically connected with the ground end, the fourth end of the first optocoupler is electrically connected with the second pole of the second voltage stabilizing diode and the control end of the first transistor respectively, the first pole of the second voltage stabilizing diode, the first pole of the first transistor and the first pole of the first voltage stabilizing diode are electrically connected with a second voltage end.

[0015] The first pole of the first voltage stabilizing diode is also electrically connected with the first end of the touch switch, the second pole of the first voltage stabilizing diode is electrically connected with the second pole of the first transistor, the first pole of the first diode and the second end of the touch switch respectively.

[0016] The second pole of the first diode is electrically connected with the enable end of the flyback power supply control unit, wherein the voltage provided by the first voltage end is less than the voltage provided by the second voltage end.

[0017] Optionally, the start control unit further comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first capacitor, a second capacitor and a third voltage stabilizing diode.

[0018] The first resistor is arranged in series between the output end of the battery management unit and the control end of the first triode, the second resistor and the first capacitor are arranged in parallel at the control end of the first triode.

[0019] The third resistor is connected in series between the first voltage terminal and the first terminal of the first optocoupler. The first terminal of the fourth resistor is electrically connected to the fourth terminal of the first optocoupler. The second terminal of the fourth resistor is electrically connected to the first terminal of the fifth resistor and the second electrode of the second Zener diode. The second terminal of the fifth resistor is electrically connected to the first electrode of the second Zener diode.

[0020] The first plate of the second capacitor is electrically connected to the second plate of the first diode and the first terminal of the sixth resistor, the second plate of the second capacitor is electrically connected to the ground terminal, and the second terminal of the sixth resistor is electrically connected to the enable terminal of the flyback power supply control unit.

[0021] The third Zener diode, the third capacitor, and the seventh resistor are all connected in parallel at the enable terminal of the flyback power supply control unit.

[0022] Optionally, the isolation transformer unit includes an isolation transformer;

[0023] The output unit includes a first output circuit, a second output circuit, and a third output circuit;

[0024] The first secondary side of the isolation transformer is electrically connected to the first output circuit, the second secondary side is electrically connected to the second output circuit, and the third secondary side is electrically connected to the third output circuit.

[0025] The first output circuit, the second output circuit, and the third output circuit output different currents or voltages, and the output terminal of any one of the first output circuit, the second output circuit, and the third output circuit is electrically connected to the input terminal of the battery management unit.

[0026] Optionally, the first output circuit includes a first rectifier module and a first electrostatic discharge protection module. The voltage output from the first secondary side is rectified by the first rectifier module and the first electrostatic discharge protection module to output a first rated voltage, and has a first maximum current under the first rated voltage.

[0027] The second output circuit includes a second rectifier module and a second electrostatic discharge protection module. The voltage output from the second secondary side is converted into a second rated voltage after passing through the second rectifier module and the second electrostatic discharge protection module, and has a first maximum current under the second rated voltage.

[0028] The third output circuit includes a third rectifier module and a third electrostatic discharge protection module. The voltage output from the third secondary side is rectified by the third rectifier module and the third electrostatic discharge protection module to output the first rated voltage, and has a second maximum current under the first rated voltage. The first rated voltage is greater than the second rated voltage, and the first maximum current is greater than the second maximum current.

[0029] Optionally, the ultra-wide voltage input power supply system further includes an input unit;

[0030] The first and second input terminals of the input unit are electrically connected to the battery voltage terminal, and the output terminal of the input unit is electrically connected to the second input terminal of the isolation transformer unit.

[0031] Optionally, the input unit includes a filtering module, a short-circuit protection module, an input protection module, and a third electrostatic discharge (ESD) protection module, which are disposed between the battery voltage terminal and the second input terminal of the isolation transformer unit.

[0032] Optionally, the ultra-wide voltage input power supply system further includes an overvoltage detection unit and an auxiliary winding power supply unit;

[0033] The flyback power supply control unit also includes a feedback terminal. The overvoltage detection unit is electrically connected to the auxiliary winding power supply unit and the feedback terminal of the flyback power supply control unit. The auxiliary winding power supply unit is also electrically connected to the third input terminal and the fourth input terminal of the flyback power supply control unit.

[0034] Optionally, the ultra-wide voltage input power supply system further includes an output feedback unit, which is used to provide feedback based on the output of the flyback power control unit, thereby adjusting the pulse width of the flyback power control unit.

[0035] In the ultra-wide voltage input power supply system provided in this embodiment of the invention, the enable terminal of the flyback power supply control unit is electrically connected to the output terminal of the start-up control unit, and the output terminal of the flyback power supply control unit is electrically connected to the first input terminal of the isolation transformer unit. The output terminal of the isolation transformer unit is electrically connected to the output unit, the output unit is electrically connected to the input terminal of the battery management unit, and the output terminal of the battery management unit is electrically connected to the control terminal of the start-up control unit. The start-up control unit is used to keep the flyback power supply control unit continuously on according to the first control signal output by the battery management unit, and to control the flyback power supply control unit to turn off according to the second control signal output by the battery management unit. In this way, the start-up control unit can control the flyback control unit to remain on or automatically shut down according to the battery management unit, achieving zero power consumption and avoiding damage caused by battery over-discharge. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of an ultra-wide voltage input power supply system provided in an embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram of the structure of a start-up control unit provided in an embodiment of the present invention;

[0038] Figure 3 This is an overall schematic diagram of an ultra-wide voltage input power supply system provided in an embodiment of the present invention;

[0039] Figure 4 This is a partial schematic diagram of an ultra-wide voltage input power supply system provided in an embodiment of the present invention. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be fully described below with reference to the accompanying drawings of the embodiments of this invention through specific implementation methods. Obviously, the described embodiments are only some, not all, embodiments of this invention. Various modifications and variations can be made to this invention without departing from the spirit or scope of this invention, which will be obvious to those skilled in the art. Therefore, this invention is intended to cover modifications and variations of this invention that fall within the scope of the corresponding claims (the claimed technical solutions) and their equivalents.

[0041] Furthermore, the terms "first," "second," and similar terms used in the embodiments of this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, terms such as "an," "one," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. Terms such as "including" or "comprising" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes. In addition, descriptions of "same" or "equal" in the embodiments of this disclosure do not mean that two objects are completely equal in size or shape; they are allowed to be approximately the same or approximately equal within a certain error range.

[0042] It should be noted that the implementation methods provided in the embodiments of the present invention can be combined with each other without contradiction.

[0043] Figure 1This is a schematic diagram of an ultra-wide voltage input power supply system provided in an embodiment of the present invention. See also... Figure 1 The ultra-wide voltage input power supply system includes a startup control unit 10, a flyback power supply control unit 20, an isolation transformer unit 30, an output unit 40, and a battery management unit 50. The enable terminal of the flyback power supply control unit 20 is electrically connected to the output terminal of the startup control unit 10, and the output terminal of the flyback power supply control unit 20 is electrically connected to the first input terminal of the isolation transformer unit 30. The output terminal of the isolation transformer unit 30 is electrically connected to the output unit 40, the output unit 40 is electrically connected to the input terminal of the battery management unit 50, and the output terminal of the battery management unit 50 is electrically connected to the control terminal of the startup control unit. The startup control unit 10 is used to keep the flyback power supply control unit 20 continuously on according to a first control signal output by the battery management unit 50, and to control the flyback power supply control unit 20 to shut down according to a second control signal output by the battery management unit 50.

[0044] Specifically, such as Figure 1 As shown, the ultra-wide voltage input power supply system includes a startup control unit 10, a flyback power supply control unit 20, an isolation transformer unit 30, an output unit 40, and a battery management unit 50. The output terminal of the flyback power supply control unit 20 is electrically connected to the first input terminal of the isolation transformer unit 30. When the flyback power supply control unit 20 is turned on, it generates a pulse width modulation signal and adjusts the duty cycle to stabilize the output voltage to the first input terminal of the isolation transformer unit 30. Furthermore, the ultra-wide voltage input power supply system also includes an input unit 60, the output terminal of which is electrically connected to the second input terminal of the isolation transformer unit 30. The input unit 60 may include a filtering module, a short-circuit protection module, an input protection module, and an electrostatic discharge (ESD) protection module. Specifically, the battery voltage is input through the first input terminal BAT+ and the second input terminal BAT- of the input unit 60. After being filtered and shaped by the filtering module, short-circuit protected by the short-circuit protection module, protected by the input protection module, and EMC protected by the ESD protection circuit, the voltage is output to the second input terminal of the isolation transformer unit 30. It is understood that the first input terminal and the second input terminal of the isolation transformer unit 30 can be two pins of a primary side of the isolation transformer unit 30.

[0045] In addition, the ultra-wide voltage input power supply system also includes a start-up control unit 10 and an output unit 40. The output terminal of the start-up control unit 10 is electrically connected to the enable terminal of the flyback power supply control unit 20, thereby enabling the start-up and shutdown of the flyback power supply control unit 20. When the flyback power supply control unit 20 is turned on, outputting a stable voltage to the first input terminal of the isolation transformer unit 30, and the battery voltage is input to the second input terminal of the isolation transformer unit 30 through the input unit 60, the secondary side of the isolation transformer unit 30 can output multiple low-voltage signals through the output unit 40. In the prior art, the start-up control unit is a self-locking switch. When the start-up control unit is closed, the flyback power supply control unit 20 starts; when the start-up control unit is opened, the flyback power supply control unit 20 shuts down. This switching method is entirely controlled by the self-locking switch, lacks a low-power mode, and requires manual judgment to shut down, which can easily lead to battery over-discharge and damage.

[0046] To this end, this embodiment of the invention includes an ultra-wide voltage input power supply system further comprising a battery management unit 50. The input terminal of the battery management unit 50 is electrically connected to the output terminal of the output unit 40, and the output terminal of the battery management unit 50 is electrically connected to the control terminal of the start control unit 10. For example, the start control unit 10 may include a touch switch. When the touch switch is pressed once, the flyback power control unit 20 starts, the output unit 40 outputs voltage to the MCU of the battery management unit 50, and the MCU of the battery management unit 50 outputs a first control signal to the start control unit 10. The start control unit 10 controls the flyback power control unit 20 to remain on according to the first control signal. When the MCU of the battery management unit 50 determines that the flyback power control unit 20 needs to be turned off, it sends a second control signal to the start control unit 10, and the start control unit 10 controls the flyback power control unit 20 to turn off according to the second control signal. Thus, the start control unit 10 can control the flyback power control unit 20 to remain on or automatically turn off according to the battery management unit 50, achieving zero power consumption and avoiding damage caused by battery over-discharge.

[0047] In summary, in the ultra-wide voltage input power supply system provided by this invention, the enable terminal of the flyback power supply control unit is electrically connected to the output terminal of the start-up control unit, and the output terminal of the flyback power supply control unit is electrically connected to the first input terminal of the isolation transformer unit. The output terminal of the isolation transformer unit is electrically connected to the output unit, the output unit is electrically connected to the input terminal of the battery management unit, and the output terminal of the battery management unit is electrically connected to the control terminal of the start-up control unit. The start-up control unit is used to keep the flyback power supply control unit continuously on according to the first control signal output by the battery management unit, and to control the flyback power supply control unit to turn off according to the second control signal output by the battery management unit. Thus, the start-up control unit can control the flyback control unit to remain on or automatically shut down according to the battery management unit, achieving zero power consumption and avoiding damage caused by battery over-discharge.

[0048] Optionally, based on the above embodiments, Figure 2 This is a schematic diagram of the structure of a startup control unit provided in an embodiment of the present invention. See also... Figure 2 The start control unit 10 includes a first switch control circuit 110 and a second switch control circuit 120. The first switch control circuit 110 is electrically connected to the enable terminal of the flyback power supply control unit 20 and is used to control the flyback power supply control unit 20 to turn on. The second switch control circuit 120 is electrically connected to both the battery management unit 50 and the flyback power supply control unit 20, and is used to keep the flyback power supply control unit 20 in the on state according to a first control signal output by the battery management unit 50, and to control the flyback power supply control unit 20 to turn off according to a second control signal output by the battery management unit 50.

[0049] For details, see Figure 2The start control unit 10 may include a first switch control circuit 110 and a second switch control circuit 120. Both the first switch control circuit 110 and the second switch control circuit 120 are electrically connected to the enable terminal of the flyback power supply control unit 20, and the first switch control circuit 110 and the second switch control circuit 120 are interconnected. The first switch control circuit 110 may include a touch switch. The first switch control circuit 110 is used to control the initial start-up of the flyback power supply control unit 20. For example, when the touch switch in the first switch control circuit 110 is pressed once, the flyback power supply control unit 20 starts. At this time, the output unit 40 outputs voltage to the MCU of the battery management unit 50. The MCU of the battery management unit 50 outputs a first control signal to the second switch control circuit 120 based on the voltage output by the output unit 40. The second switch control circuit 120 controls the flyback power supply control unit 20 to remain on based on the first control signal. At this time, even if the touch switch in the first switch control circuit 110 is released, the flyback power supply control unit 20 remains on. When the MCU of the battery management unit 50 determines that the flyback power control unit 20 needs to be turned off, it sends a second control signal to the second switch control circuit 120. The second switch control circuit 120 then controls the flyback power control unit 20 to turn off according to the second control signal. In this way, the start control unit 10 can control the flyback power control unit 20 to remain on or automatically turn off according to the battery management unit 50, achieving zero power consumption and avoiding damage caused by over-discharge of the battery.

[0050] Optionally, based on the above embodiments, see also... Figure 1 and Figure 2The first switch control unit 110 includes a touch switch K1 and a first diode D1. The second switch control circuit 120 includes a first transistor Q1, a first optocoupler Q2, a first Zener diode Z1, a second Zener diode Z2, and a first transistor Q3. The output terminal of the battery management unit 50 is electrically connected to the control terminal of the first transistor Q1. The first terminal of the first transistor Q1 is electrically connected to the ground terminal GND-SPS. The second terminal of the first transistor Q1 is electrically connected to the second terminal of the first optocoupler Q2. The first terminal of the first optocoupler Q2 is coupled to the first voltage terminal VDD1. The third terminal of the first optocoupler Q2 is electrically connected to the ground terminal GND-SPS. The fourth terminal of the first optocoupler Q2 is electrically connected to the second terminal of the second Zener diode Z2 and the control terminal of the first transistor Q3. The first terminals of the second Zener diode Z2, the first transistor Q3, and the first Zener diode Z1 are all electrically connected to the second voltage terminal VDD2. The first terminal of the first Zener diode Z1 is also electrically connected to the first terminal of the touch switch K1. The second terminal of the first Zener diode Z1 is electrically connected to the second terminal of the first transistor Q3, the first terminal of the first diode D1, and the second terminal of the touch switch K1. The second terminal of the first diode D1 is electrically connected to the enable terminal of the flyback power supply control unit 20. The voltage provided by the first voltage terminal VDD1 is less than the voltage provided by the second voltage terminal VDD2. For example, the voltage provided by the first voltage terminal VDD1 can be 5V, and the voltage provided by the second voltage terminal VDD2 can be 15V.

[0051] Specifically, the first switch control circuit 110 includes a touch switch K1. The first terminal of touch switch K1 is electrically connected to the first electrode of the first Zener diode Z1, and the second terminal of touch switch K1 is electrically connected to the second electrode of the first Zener diode Z1. The first electrode of the first diode D1 is electrically connected to the second electrode of the first Zener diode Z1, and the second electrode of the first diode D1 is electrically connected to the enable terminal of the flyback power supply control unit 20. The flyback power supply control unit 20 includes a flyback power supply control chip U1. Thus, by clicking the touch switch K1, the 15V voltage output from the second voltage terminal VDD2 reaches the enable terminal EN of the flyback power supply control chip U1 through the first diode D1, pulling the level of the enable terminal EN of the flyback power supply control chip U1 high, and the flyback power supply control chip U1 starts up, causing the output unit 40 to output 12V and 5V voltages. The 5V voltage is supplied to the MCU of the power management unit 50. Under the 5V voltage, the MCU of the power management unit 50 pulls the output pin MCU-HOLD high, that is, the output pin MCU-HOLD outputs a high-level signal to the control terminal of the first transistor Q1. The first transistor Q1 conducts, causing the first optocoupler Q2 to conduct and work. At this time, the first transistor Q3 conducts, and the voltage provided by the second voltage terminal VDD2 reaches the enable terminal of the flyback power supply control unit 20 through the first transistor Q3 and the first diode D1, maintaining the high-level signal of the enable terminal of the flyback power supply control unit 20, so that the flyback power supply control unit 20 is continuously turned on. When the MCU in the battery management unit 50 determines that the flyback power supply control unit 20 needs to be turned off, it sends a second control signal (low-level signal) to the first transistor Q1. The first transistor Q1 is turned off, the first optocoupler Q2 is not working, the first transistor Q3 is cut off, the enable terminal of the flyback power supply control unit 20 is low, and the flyback power supply control unit 20 is turned off. In this way, the start control unit 10 can control the flyback power supply control unit 20 to remain on or automatically turn off according to the battery management unit 50, achieving zero power consumption and avoiding damage caused by over-discharge of the battery.

[0052] Optionally, based on the above embodiments, see also... Figure 2 The start control unit 10 also includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a first capacitor C1, a second capacitor C2, and a third Zener diode Z3.

[0053] A first resistor R1 is connected in series between the output terminal of the battery management unit 50 and the control terminal of the first transistor Q1. A second resistor R2 and a first capacitor C1 are both connected in parallel between the control terminal of the first transistor Q1. A third resistor R3 is connected in series between the first voltage terminal VDD1 and the first terminal of the first optocoupler Q2. The first terminal of a fourth resistor R4 is electrically connected to the fourth terminal of the first optocoupler Q2. The second terminal of the fourth resistor R4 is electrically connected to the first terminal of the fifth resistor R5 and the second electrode of the second Zener diode Z2. The second terminal of the fifth resistor R5 is electrically connected to the first electrode of the second Zener diode Z2. The first plate of the second capacitor C2 is electrically connected to the second electrode of the first diode D1 and the first terminal of the sixth resistor R6. The second plate of the second capacitor C2 is electrically connected to the ground terminal GND-SPS. The second terminal of the sixth resistor R6 is electrically connected to the enable terminal of the flyback power supply control unit 20. A third Zener diode Z3, a third capacitor C3, and a seventh resistor R7 are all connected in parallel between the enable terminal of the flyback power supply control unit 20. Thus, in the above circuit structure, filtering is performed by the first resistor R1, the second resistor R2, and the first capacitor C1, and the startup control circuit 10 is protected by other resistors and capacitors. It can be understood that the above resistors and capacitors all play the role of filtering and protecting the circuit to ensure the normal operation of the circuit. The embodiments of the present invention will not be described in detail.

[0054] Optionally, based on the above embodiments, Figure 3 This is a partial schematic diagram of an ultra-wide voltage input power supply system provided in an embodiment of the present invention. See also... Figure 1 and Figure 3 The isolation transformer unit 30 includes an isolation transformer U2. The output unit 40 includes a first output circuit 410, a second output circuit 420, and a third output circuit 430. The first secondary side of the isolation transformer U2 is electrically connected to the first output circuit 410, the second secondary side is electrically connected to the second output circuit 420, and the third secondary side is electrically connected to the third output circuit 430. The current or voltage output by the first output circuit 410, the second output circuit 420, and the third output circuit 430 are different, and the output terminal of any one of the first output circuit 410, the second output circuit 420, and the third output circuit 430 is electrically connected to the input terminal of the battery management unit 50.

[0055] Specifically, such as Figure 1 and Figure 3As shown, the output unit 40 includes multiple output circuits, namely a first output circuit 410, a second output circuit 420, and a third output circuit 430. These multiple output circuits are electrically connected to different secondary sides of the isolation transformer U2. Therefore, when the input unit 60 inputs voltage to the second input terminal of the isolation transformer U2, and the flyback power supply control unit 20 inputs voltage to the first input terminal of the isolation transformer U2, the isolation transformer U2 outputs different voltages or currents through the multiple output circuits. For example, the first output circuit 410 outputs a first rated voltage and has a first maximum current at the first rated voltage. The second output circuit 420 outputs a second rated voltage and has a first maximum current at the second rated voltage. The third output circuit 430 outputs a first rated voltage and has a second maximum current at the first rated voltage. The first rated voltage is greater than the second rated voltage, and the first maximum current is greater than the second maximum current. The first rated voltage can be 12V, the first maximum current can be 2A, the second rated voltage can be 5V, and the second maximum current can be 0.4A.

[0056] Optionally, based on the above embodiments, see also... Figure 3 The first output circuit 410 includes a first rectifier module (not shown in the figure) and a first electrostatic discharge (ESD) protection module (not shown in the figure). The voltage output from the first secondary side is rectified by the first rectifier module and the first ESD protection module to output a first rated voltage, and has a first maximum current at the first rated voltage, thereby ensuring the stability of the output of the first output circuit 410. The second output circuit 420 includes a second rectifier module (not shown in the figure) and a second ESD protection module (not shown in the figure). The voltage output from the second secondary side is rectified by the second rectifier module and the second ESD protection module to output a second rated voltage, and has a first maximum current at the second rated voltage, thereby ensuring the stability of the output of the second output circuit 420. The third output circuit 430 includes a third rectifier module (not shown in the figure) and a third ESD protection module (not shown in the figure). The voltage output from the third secondary side is rectified by the third rectifier module and the third ESD protection module to output a first rated voltage, and has a second maximum current at the first rated voltage, thereby ensuring the stability of the output of the third output circuit 430.

[0057] Optionally, based on the above embodiments, see also... Figure 1 and Figure 3The first input terminal BAT+ and the second input terminal BAT- of the input unit 60 are electrically connected to the battery voltage terminal. The output terminal of the input unit 60 is electrically connected to the second input terminal of the isolation transformer unit U2. The output terminal ODC-C of the flyback power supply control unit 20 is electrically connected to the first input terminal of the isolation transformer unit U2. Specifically, when the flyback power supply control unit 20 is turned on, and the output terminal ODC-C outputs a stable voltage to the first input terminal of the isolation transformer unit 30, and the voltage from the battery voltage terminal is input to the second input terminal of the isolation transformer unit 30 through the input unit 60, the secondary side of the isolation transformer unit 30 can output multiple low voltages through the output unit 40. In addition, the input unit 60 includes a filter module (not shown in the figure), a short-circuit protection module (not shown in the figure), an input protection module (not shown in the figure), and a third electrostatic discharge (ESD) protection module (not shown in the figure). The filter module, short-circuit protection module, input protection module, and third ESD protection module are disposed between the battery voltage terminal and the second input terminal of the isolation transformer unit 30. The voltage at the battery voltage terminal is input through the first input terminal BAT+ and the second input terminal BAT- of the input unit 60. After being filtered and shaped by the filtering module, protected against short circuits by the short circuit protection module, protected by the input protection module, and provided with EMC protection by the electrostatic discharge protection circuit, the voltage is output to the second input terminal of the isolation transformer unit 30.

[0058] Optional, Figure 4 This is a partial schematic diagram of an ultra-wide voltage input power supply system provided in an embodiment of the present invention. See also... Figure 1 and Figure 4 The ultra-wide input voltage power supply system also includes an overvoltage detection unit 70 and an auxiliary winding power supply unit 80. The flyback power control unit 20 also includes a feedback terminal. The overvoltage detection unit 70 is electrically connected to both the auxiliary winding power supply unit 80 and the feedback terminal of the flyback power control unit 20. The auxiliary winding power supply unit 80 is also electrically connected to the third and fourth input terminals of the flyback power control unit 20. Specifically, the auxiliary winding power supply 80 is electrically connected to the third and fourth input terminals of the flyback power control unit 20 to supply power to the flyback power control unit 20. The overvoltage detection unit 70 is electrically connected to the feedback terminal of the flyback power control unit 20 to provide overvoltage protection when overvoltage is detected at the output of the flyback power control unit 20, thereby ensuring the reliability of the ultra-wide input voltage power supply system.

[0059] Optional, see below Figure 4 The ultra-wide voltage input power supply system also includes an output feedback unit 90, which is used to provide feedback based on the output of the flyback power supply control unit 20, thereby adjusting the pulse width of the flyback power supply control unit 20. Specifically, the output of the flyback power supply control unit 20 is adjusted in conjunction with the output feedback unit 90 to ensure the stability of the output of the flyback power supply control unit 20.

[0060] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. An ultra-wide voltage input power supply system, characterized in that, The ultra-wide voltage input power supply system includes a startup control unit, a flyback power supply control unit, an isolation transformer unit, an output unit, and a battery management unit. The enable terminal of the flyback power supply control unit is electrically connected to the output terminal of the start-up control unit, and the output terminal of the flyback power supply control unit is electrically connected to the first input terminal of the isolation transformer unit. The output terminal of the isolation transformer unit is electrically connected to the output unit, the output unit is electrically connected to the input terminal of the battery management unit, and the output terminal of the battery management unit is electrically connected to the control terminal of the start control unit. The start-up control unit is used to keep the flyback power control unit continuously turned on according to a first control signal output by the battery management unit, and to control the flyback power control unit to turn off according to a second control signal output by the battery management unit.

2. The ultra-wide voltage input power supply system according to claim 1, characterized in that, The start-up control unit includes a first switch control circuit and a second switch control circuit. The first switch control circuit is electrically connected to the enable terminal of the flyback power supply control unit and is used to control the flyback power supply control unit to turn on. The second switch control circuit is electrically connected to the battery management unit and the flyback power control unit respectively, and is used to keep the flyback power control unit in the on state according to the first control signal output by the battery management unit, and to control the flyback power control unit to be turned off according to the second control signal output by the battery management unit.

3. The ultra-wide voltage input power supply system according to claim 2, characterized in that, The first switch control unit includes a touch switch and a first diode; The second switch control circuit includes a first transistor, a first optocoupler, a first Zener diode, a second Zener diode, and a first transistor; The output terminal of the battery management unit is electrically connected to the control terminal of the first transistor. The first terminal of the first transistor is electrically connected to the ground terminal. The second terminal of the first transistor is electrically connected to the second terminal of the first optocoupler. The first terminal of the first optocoupler is coupled to the first voltage terminal. The third terminal of the first optocoupler is electrically connected to the ground terminal. The fourth terminal of the first optocoupler is electrically connected to the second terminal of the second Zener diode and the control terminal of the first transistor. The first terminals of the second Zener diode, the first terminal of the first transistor, and the first terminal of the first Zener diode are all electrically connected to the second voltage terminal. The first terminal of the first Zener diode is also electrically connected to the first terminal of the touch switch, and the second terminal of the first Zener diode is electrically connected to the second terminal of the first transistor, the first terminal of the first diode, and the second terminal of the touch switch, respectively. The second terminal of the first diode is electrically connected to the enable terminal of the flyback power supply control unit, wherein the voltage provided by the first voltage terminal is less than the voltage provided by the second voltage terminal.

4. The ultra-wide voltage input power supply system according to claim 3, characterized in that, The start-up control unit also includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first capacitor, a second capacitor, and a third Zener diode; The first resistor is connected in series between the output terminal of the battery management unit and the control terminal of the first transistor, and the second resistor and the first capacitor are both connected in parallel between the control terminal of the first transistor. The third resistor is connected in series between the first voltage terminal and the first terminal of the first optocoupler. The first terminal of the fourth resistor is electrically connected to the fourth terminal of the first optocoupler. The second terminal of the fourth resistor is electrically connected to the first terminal of the fifth resistor and the second electrode of the second Zener diode. The second terminal of the fifth resistor is electrically connected to the first electrode of the second Zener diode. The first plate of the second capacitor is electrically connected to the second plate of the first diode and the first terminal of the sixth resistor, the second plate of the second capacitor is electrically connected to the ground terminal, and the second terminal of the sixth resistor is electrically connected to the enable terminal of the flyback power supply control unit. The third Zener diode, the third capacitor, and the seventh resistor are all connected in parallel at the enable terminal of the flyback power supply control unit.

5. The ultra-wide voltage input power supply system according to claim 1, characterized in that, The isolation transformer unit includes an isolation transformer; The output unit includes a first output circuit, a second output circuit, and a third output circuit; The first secondary side of the isolation transformer is electrically connected to the first output circuit, the second secondary side is electrically connected to the second output circuit, and the third secondary side is electrically connected to the third output circuit. The first output circuit, the second output circuit, and the third output circuit output different currents or voltages, and the output terminal of any one of the first output circuit, the second output circuit, and the third output circuit is electrically connected to the input terminal of the battery management unit.

6. The ultra-wide voltage input power supply system according to claim 5, characterized in that, The first output circuit includes a first rectifier module and a first electrostatic discharge protection module. The voltage output from the first secondary side is rectified by the first rectifier module and the first electrostatic discharge protection module to output a first rated voltage, and has a first maximum current under the first rated voltage. The second output circuit includes a second rectifier module and a second electrostatic discharge protection module. The voltage output from the second secondary side is converted into a second rated voltage after passing through the second rectifier module and the second electrostatic discharge protection module, and has a first maximum current under the second rated voltage. The third output circuit includes a third rectifier module and a third electrostatic discharge protection module. The voltage output from the third secondary side is rectified by the third rectifier module and the third electrostatic discharge protection module to output the first rated voltage, and has a second maximum current under the first rated voltage. The first rated voltage is greater than the second rated voltage, and the first maximum current is greater than the second maximum current.

7. The ultra-wide voltage input power supply system according to claim 1, characterized in that, The ultra-wide voltage input power supply system also includes an input unit; The first and second input terminals of the input unit are electrically connected to the battery voltage terminal, and the output terminal of the input unit is electrically connected to the second input terminal of the isolation transformer unit.

8. The ultra-wide voltage input power supply system according to claim 7, characterized in that, The input unit includes a filtering module, a short-circuit protection module, an input protection module, and a third electrostatic discharge (ESD) protection module. The filtering module, short-circuit protection module, input protection module, and third ESD protection module are disposed between the battery voltage terminal and the second input terminal of the isolation transformer unit.

9. The ultra-wide voltage input power supply system according to claim 1, characterized in that, The ultra-wide voltage input power supply system also includes an overvoltage detection unit and an auxiliary winding power supply unit; The flyback power supply control unit also includes a feedback terminal. The overvoltage detection unit is electrically connected to the auxiliary winding power supply unit and the feedback terminal of the flyback power supply control unit. The auxiliary winding power supply unit is also electrically connected to the third input terminal and the fourth input terminal of the flyback power supply control unit.

10. The ultra-wide voltage input power supply system according to claim 1, characterized in that, The ultra-wide voltage input power supply system also includes an output feedback unit, which is used to provide feedback based on the output of the flyback power control unit, thereby adjusting the pulse width of the flyback power control unit.

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