Power supply circuit for charge-discharge all-in-one machine control system and charge-discharge all-in-one machine

Abstract

A power supply circuit for a charging and discharging all-in-one machine control system comprises a commercial power battery power supply module, a built-in power supply module and a fast charging power supply module. A first end of the commercial power battery power supply module is connected with commercial power, a second end is connected with a battery, a third end is connected with a control system, and the commercial power battery power supply module is used for converting commercial power voltage into first power supply voltage for supplying power to the control system during charging and converting battery voltage into the first power supply voltage for supplying power to the control system during discharging; the built-in power supply module is used for providing a second power supply voltage for the control system when no external power supply is provided; and the fast charging power supply module is used for providing a third power supply voltage for the control system when the energy of the built-in power supply module is insufficient. When the charging and discharging all-in-one machine is used as a charging machine and a discharging machine, different power supply schemes can be provided for a control system of the charging and discharging all-in-one machine, so that normal starting and portable use of the charging and discharging all-in-one machine are realized.

Description

Technical Field

[0001] The utility model relates to a charging and discharging integrated machine, and more specifically, to a power supply circuit used for a control system of the charging and discharging integrated machine, and a charging and discharging integrated machine comprising the power supply circuit. Background Art

[0002] As the number of electric vehicles in the market increases, users have higher and higher requirements for the battery life of electric vehicles. In order to meet the needs of home charging of cars, power replenishment and exchange between cars, and power supply and output of cars to electrical equipment, the industry currently mainly uses electric vehicle charging and discharging integrated machines to achieve charging and discharging of electric vehicles.

[0003] When the electric vehicle charging and discharging integrated machine (hereinafter referred to as the integrated machine) is used as a charger, it can use the mains electricity to charge the electric vehicle. When used as a discharger, the electric vehicle battery can be used as a DC power source to invert AC power through the integrated machine for use by AC equipment. When used as a charger, the mains electricity can also power the integrated machine. The mains electricity provides a 12V power supply to the control system of the integrated machine through rectification and DC / DC conversion. When used as a discharger, it is necessary to give priority to solving the power supply problem of the control system of the integrated machine. After the integrated machine is started, it interacts with the electric vehicle, and the electric vehicle outputs electrical energy. Before the electric vehicle outputs electrical energy, it is necessary to provide power to the integrated machine for the operation of the integrated machine.

[0004] However, the control system of the current conventional integrated machine is usually powered by a low-voltage battery on board. Not only is the charging method single, but when the voltage of the low-voltage battery on board is too low or damaged, power cannot be supplied, resulting in the inability of the integrated machine to operate normally. Utility Model Content

[0005] The technical problem to be solved by the utility model is that, in view of the above-mentioned defects of the prior art, a power supply circuit for a charging and discharging integrated machine control system and a charging and discharging integrated machine including the power supply circuit are provided, which can provide different power supply schemes for the control system of the charging and discharging integrated machine when the charging and discharging integrated machine is used as a charger and a discharger, respectively, so as to achieve its normal startup and portable use.

[0006] The technical solution adopted by the utility model to solve the technical problem is: constructing a power supply circuit for a charging and discharging integrated machine control system, including a mains battery power supply module, a built-in power supply module and a fast charging power supply module;

[0007] The first end of the mains battery power supply module is connected to the mains, the second end is connected to the battery, and the third end is connected to the control system, and is used to convert the mains voltage into a first power supply voltage for powering the control system during charging, and convert the battery voltage into the first power supply voltage for powering the control system during discharging;

[0008] The built-in power supply module is arranged inside the control system, and is used to provide a second power supply voltage for the control system when there is no external power supply;

[0009] The first end of the fast charging power supply module is connected to the charging power supply, and the second end is connected to the control system, and is used to provide a third power supply voltage for the control system when the energy of the built-in power supply module is insufficient.

[0010] In the power supply circuit for the control system of the charging and discharging integrated machine described in the utility model, the built-in power supply module includes a supercapacitor, a control switch, a comparator, a first DC / DC conversion unit, a grounding capacitor, a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a fifth switch tube and a sixth switch tube, a first diode, a first resistor and a second resistor;

[0011] The supercapacitor is connected to the first end of the control switch and the first end of the first switch tube respectively; the second end of the control switch is connected to the first end of the grounded capacitor and the first end of the comparator via the first resistor respectively; the second end of the comparator receives the reference voltage and the output end is connected to the control end of the third switch tube; the first end of the third switch tube, the first end of the fourth switch tube, the first end of the fifth switch tube and the first end of the sixth switch tube are grounded; the second end of the third switch tube is connected to the control end of the first switch tube and the second end of the fourth switch tube; the control end of the fourth switch tube and the control end of the sixth switch tube respectively receive the control signal of the control system; the second end of the first switch tube is connected to the first end of the second switch tube, the second end of the second switch tube is connected to the first end of the first DC / DC conversion unit, and the second end of the first DC / DC conversion unit outputs the second power supply voltage; the control end of the fifth switch tube is connected to the first end of the grounded capacitor, and the second end is connected to the second end of the sixth switch tube, the control end of the second switch tube and the cathode of the first diode; the second end of the grounded capacitor is grounded; the anode of the first diode is connected to the first end of the grounded capacitor.

[0012] In the power supply circuit for the integrated charging and discharging machine control system described in the utility model, the built-in power supply module further includes a third resistor and a fourth resistor;

[0013] The third resistor is connected between the first end and the output end of the comparator, the first end of the fourth resistor is connected to the cathode of the first diode, and the second end is connected to the second end of the fifth switch tube, the second end of the sixth switch tube and the control end of the second switch tube.

[0014] In the power supply circuit for the integrated charging and discharging machine control system described in the utility model, the built-in power supply module further includes a second diode, a third diode and a charging management unit; the anode of the second diode receives the first power supply voltage, and the cathode is connected to the first end of the charging management unit, the anode of the third diode receives the second power supply voltage, and the cathode is connected to the first end of the charging management unit, and the second end of the charging management unit is connected to the second end of the second switch tube.

[0015] In the power supply circuit for the integrated charging and discharging machine control system described in the utility model, the mains battery power supply module includes a single-phase active PFC unit, a second DC / DC conversion unit and a third DC / DC conversion unit;

[0016] The first end of the single-phase active PFC unit receives the mains voltage, and the second end is respectively connected to the first end of the second DC / DC conversion unit and the first end of the third DC / DC conversion unit; the second end of the third DC / DC conversion unit is connected to the battery; and the second end of the second DC / DC conversion unit outputs the first power supply voltage.

[0017] In the power supply circuit for the integrated charging and discharging machine control system described in the utility model, the fast charging power supply module includes a fast charging interface and a fourth DC / DC conversion unit; the first end of the fourth DC / DC conversion unit is connected to the charging power supply through the fast charging interface, and the second end outputs the third power supply voltage.

[0018] In the power supply circuit for the integrated charging and discharging machine control system described in the utility model, the fast charging interface is a Type C interface.

[0019] Another technical solution adopted by the utility model to solve its technical problem is to construct a charging and discharging integrated machine, including a control system and a power supply circuit for powering the control system; the power supply circuit includes a mains battery power supply module, a built-in power supply module and a fast charging power supply module;

[0020] The first end of the mains battery power supply module is connected to the mains, the second end is connected to the battery, and the third end is connected to the control system, and is used to convert the mains voltage into a first power supply voltage for powering the control system during charging, and convert the battery voltage into the first power supply voltage for powering the control system during discharging;

[0021] The built-in power supply module is arranged inside the control system, and is used to provide a second power supply voltage for the control system when there is no external power supply;

[0022] The first end of the fast charging power supply module is connected to the charging power supply, and the second end is connected to the control system, and is used to provide a third power supply voltage for the control system when the energy of the built-in power supply module is insufficient.

[0023] In the charging and discharging integrated machine described in the utility model, the built-in power supply module includes a supercapacitor, a control switch, a comparator, a first DC / DC conversion unit, a grounding capacitor, a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a fifth switch tube and a sixth switch tube, a first diode, a first resistor and a second resistor; the supercapacitor is respectively connected to the first end of the control switch and the first end of the first switch tube, the second end of the control switch is respectively connected to the first end of the grounding capacitor and the first end of the comparator through the first resistor, the second end of the comparator receives a reference voltage, and the output end is connected to the control end of the third switch tube; the first end of the third switch tube, the first end of the fourth switch tube, the first end of the fifth switch tube and the sixth switch The first end of the switch is grounded; the second end of the third switch is connected to the control end of the first switch and the second end of the fourth switch; the control end of the fourth switch and the control end of the sixth switch receive control signals of the control system respectively; the second end of the first switch is connected to the first end of the second switch, the second end of the second switch is connected to the first end of the first DC / DC conversion unit, and the second end of the first DC / DC conversion unit outputs the second power supply voltage; the control end of the fifth switch is connected to the first end of the grounded capacitor, and the second end is connected to the second end of the sixth switch, the control end of the second switch and the cathode of the first diode; the second end of the grounded capacitor is grounded; the anode of the first diode is connected to the first end of the grounded capacitor;

[0024] The mains battery power supply module includes a single-phase active PFC unit, a second DC / DC conversion unit and a third DC / DC conversion unit; the first end of the single-phase active PFC unit receives the mains voltage, and the second end is respectively connected to the first end of the second DC / DC conversion unit and the first end of the third DC / DC conversion unit; the second end of the third DC / DC conversion unit is connected to the battery; the second end of the second DC / DC conversion unit outputs the first power supply voltage;

[0025] The fast charging power supply module includes a fast charging interface and a fourth DC / DC conversion unit; the first end of the fourth DC / DC conversion unit is connected to the charging power supply through the fast charging interface, and the second end outputs the third power supply voltage.

[0026] In the charging and discharging integrated machine described in the utility model, the built-in power supply module further includes a second diode, a third diode and a charging management unit; the anode of the second diode receives the first power supply voltage, and the cathode is connected to the first end of the charging management unit, the anode of the third diode receives the second power supply voltage, and the cathode is connected to the first end of the charging management unit, and the second end of the charging management unit is connected to the second end of the second switch tube.

[0027] The power supply circuit for the integrated charging and discharging machine control system 100 and the integrated charging and discharging machine including the power supply circuit of the utility model can provide different power supply schemes for the control system 100 when the integrated charging and discharging machine is used as a charger and a discharger, thereby achieving normal startup and portable use thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0029] Figure 1 It is a principle block diagram of the power supply circuit for the control system of the charging and discharging integrated machine of the utility model;

[0030] Figure 2 It is a schematic diagram of a power supply circuit of a preferred embodiment of the utility model providing a power supply voltage for a control system of an electric vehicle charging and discharging integrated machine;

[0031] Figure 3 It is a circuit schematic diagram of a preferred mains battery power supply module for the power supply circuit of the integrated charging and discharging machine control system of the utility model;

[0032] Figure 4 It is a circuit schematic diagram of a preferred fast charging power supply module for the power supply circuit of the charging and discharging integrated machine control system of the utility model;

[0033] Figure 5 It is a circuit schematic diagram of a preferred built-in power supply module for the power supply circuit of the charging and discharging integrated machine control system of the utility model;

[0034] Figure 6 It is a schematic diagram of a power supply circuit of a preferred embodiment of the utility model providing a power supply voltage for a control system. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0036] Figure 1This is a principle block diagram of the power supply circuit for the integrated charging and discharging machine control system of the utility model. Figure 1 As shown, the power supply circuit for the control system of the charging and discharging integrated machine includes a mains battery power supply module 200, a built-in power supply module 300 and a fast charging power supply module 400. The first end of the mains battery power supply module 200 is connected to the mains, the second end is connected to the battery, and the third end is connected to the control system 100 of the charging and discharging integrated machine, and is used to convert the mains voltage into a first power supply voltage for powering the control system 100 during charging, and convert the battery voltage into the first power supply voltage for powering the control system 100 during discharging. The built-in power supply module 300 is arranged inside the control system 100, and is used to provide a second power supply voltage for the control system 100 when there is no external power supply. The first end of the fast charging power supply module 400 is connected to the charging power supply, and the second end is connected to the control system 100, and is used to provide a third power supply voltage for the control system 100 when the energy of the built-in power supply module 300 is insufficient.

[0037] Therefore, when the charging function of the integrated charging and discharging machine is used, the control system 100 can be powered by the mains after conversion, and when the discharge function of the integrated charging and discharging machine is used, the control system 100 can be powered by the battery voltage after conversion, and when the discharge function of the integrated charging and discharging machine is used but not connected to the battery (that is, when there is no external power supply), the built-in power supply module 300 provided inside is used to power the control system 100, and when the built-in power supply module 300 is insufficient, the fast charging power supply module 400 is used to power the control system 100. Therefore, the power supply circuit for the integrated charging and discharging machine control system 100 can provide different power supply schemes for the control system 100 when the integrated charging and discharging machine is used as a charger and a discharger, so as to achieve its normal startup and portable use.

[0038] In a preferred embodiment of the utility model, the AC battery power supply module 200 may include any suitable module or unit, so as to realize the conversion of the AC power to the power supply voltage of the control system, and the conversion of the battery voltage to the power supply voltage of the control system. For example, the conversion of the AC power to the power supply voltage may use, for example, a PFC unit, a DC / DC conversion unit, or an AC / DC conversion unit and a DC / DC conversion unit. For another example, the conversion of the battery voltage to the power supply voltage of the control system may use a suitable boost / buck unit.

[0039] In a preferred embodiment of the present invention, the built-in power supply module 300 includes a super capacitor and a corresponding voltage conversion circuit, so as to convert the voltage stored in the super capacitor into the power supply voltage of the control system. In a preferred embodiment of the present invention, the built-in power supply module 300 may also include a built-in battery and a corresponding battery power supply circuit, which is used to control the power supply voltage of the system with the voltage stored in the battery.

[0040] In a preferred embodiment of the present utility model, the fast charging power supply module 400 may include a fast charging interface and a DC / DC conversion unit. The DC / DC conversion unit is connected to a fast charging power source via the fast charging interface, thereby converting the voltage provided by the fast charging power source into a power supply voltage for the control system. Preferably, the fast charging power source may be a power bank, and the fast charging interface is a Type C interface.

[0041] In a preferred embodiment of the present invention, the integrated charging and discharging machine is an electric vehicle integrated charging and discharging machine, so the battery is an electric vehicle battery. In a preferred embodiment of the present invention, the integrated charging and discharging machine can also be an independent integrated charging and discharging machine, or an integrated charging and discharging machine applied to other electric equipment, all of which fall within the protection scope of the present invention.

[0042] Those skilled in the art are aware that in addition to the various implementation methods listed in the present invention, the AC battery power supply module 200, the built-in power supply module 300 and the fast charging power supply module 400 can also adopt any module or device structure known in the art, which all fall within the protection scope of the present invention.

[0043] Figure 2 The schematic diagram of the power supply circuit of the preferred embodiment of the utility model provides power supply voltage for the control system of the electric vehicle charging and discharging integrated machine. Figure 2 In the preferred embodiment shown, the control system of the electric vehicle charging and discharging integrated machine uses a 12V DC voltage as the power supply voltage of the control system. Through the mains battery power supply module 200, the built-in power supply module 300 and the fast charging power supply module 400, four methods can be used to provide a 12V power supply voltage for the control system. That is, the mains battery power supply module 200 uses the mains to provide the control system with a power supply voltage through the AC input / output interface; the mains battery power supply module 200 uses the power battery of the electric vehicle to provide the control system with a power supply voltage; the built-in power supply module 300 (for example, a built-in power supply module 300 including a supercapacitor) is used to provide the control system with a power supply voltage; and the fast charging power supply module 400 (for example, including a power bank and a TypeC interface) is used to provide the control system with a power supply voltage. Of course, in other preferred embodiments of the utility model, DC voltages of other sizes can also be used as the power supply voltage of the control system.

[0044] Figure 3 This is a circuit principle block diagram of the preferred AC battery power supply module for the power supply circuit of the integrated charging and discharging machine control system of the utility model. Figure 3 As shown, the mains battery power supply module 200 includes a single-phase active PFC unit 230, a DC / DC conversion unit 210 and a DC / DC conversion unit 220. The first end of the single-phase active PFC unit 230 receives the mains voltage, and the second end is respectively connected to the first end of the DC / DC conversion unit 210 and the first end of the DC / DC conversion unit 220; the second end of the DC / DC conversion unit 220 is connected to the vehicle power battery; the second end of the DC / DC conversion unit 210 outputs the power supply voltage 12V-1.

[0045] In a preferred embodiment of the present utility model, the single-phase active PFC unit 230 can be constructed by any known active PFC module, chip or unit in the art. The DC / DC conversion unit 210 and the DC / DC conversion unit 220 can also be any DC / DC converter known in the art. Here, the DC / DC conversion unit 220 is generally a unidirectional buck conversion circuit, which converts the high-voltage direct current output by the single-phase active PFC unit 230 into a 12V power supply voltage 12V-1 that can power the control system, and the DC / DC conversion unit 220 is generally a bidirectional conversion circuit to realize charging of the vehicle power battery or power supply by the vehicle power battery.

[0046] When using the charging function of the integrated charging and discharging machine to charge the power battery of the electric vehicle, the AC power is provided through the AC input / output interface of the single-phase active PFC unit 230. The AC power is rectified by the single-phase active PFC unit 230 to output high-voltage DC. The DC / DC conversion unit 210 performs a step-down conversion on the high-voltage DC and outputs the power supply voltage 12V-1 to the control system 100.

[0047] When the discharge function of the integrated charging and discharging machine is used, the electric vehicle power battery is used as a DC power source, and the DC voltage output by the electric vehicle power battery is converted by the DC / DC conversion unit 220, and then inverted by the single-phase active PFC unit 230, and the AC power is output through the AC input / output interface of the single-phase active PFC unit 230 for use by AC devices. At the same time, the electric vehicle power battery is used as a DC power source, and the DC voltage is converted by the DC / DC conversion unit 220, and then the DC / DC conversion unit 210 performs a step-down conversion, and then the power supply voltage 12V-1 is output to the control system 100.

[0048] Figure 4This is a circuit schematic diagram of the preferred fast charging power supply module for the power circuit of the integrated charging and discharging machine control system of the utility model. Figure 4 As shown, the fast charging power supply module 400 includes a Type C interface and a DC / DC conversion unit 410; the first end of the DC / DC conversion unit 410 is connected to a power bank through the Type C interface, and the second end outputs a power supply voltage of 12V-2. Of course, in other preferred embodiments of the utility model, the fast charging power supply module 400 can also adopt other fast charging port structures.

[0049] When using the discharge function of the integrated charging and discharging machine, the built-in power supply module 300 is usually used for power supply. When the built-in power supply module 300 is insufficient, the fast charging power supply module 400 can be used, that is, the DC / DC conversion unit 410 is preferably a boost circuit, and the power bank can provide a power supply voltage of 12V-2 to the control system through the TypeC interface.

[0050] Figure 5 This is a circuit principle block diagram of the preferred built-in power supply module of the power supply circuit for the integrated charging and discharging machine control system of the utility model. Figure 5 As shown, the built-in power supply module includes a supercapacitor, a button 1, a comparator, a DC / DC conversion unit 310, a grounding capacitor C, switch tubes P1, P2, P3, P4, P5 and P6, a diode D1, a resistor R1 and a resistor R2.

[0051] The supercapacitor is connected to the first end of the button 1 and the first end of the switch tube P1 respectively, the second end of the button 1 is connected to the first end of the grounding capacitor C and the first end of the comparator via the resistor R1 and the resistor R2 respectively, the second end of the comparator receives the reference voltage, and the output end is connected to the control end of the switch tube P3; the first end of the switch tube P3, the first end of the switch tube P4, the first end of the switch tube P5 and the first end of the switch tube P6 are grounded. The second end of the switch tube P3 is connected to the control end of the switch tube P1 and the second end of the switch tube P4; the control end of the switch tube P4 and the control end of the switch tube P6 respectively receive the control signal of the control system. The second end of the switch tube P1 is connected to the first end of the switch tube P2, the second end of the switch tube P2 is connected to the first end of the DC / DC conversion unit 310, and the second end of the DC / DC conversion unit 310 outputs the power supply voltage 12V-3; the control end of the switch tube P5 is connected to the first end of the grounded capacitor, and the second end is connected to the second end of the switch tube P6, the control end of the switch tube P2 and the cathode of the diode D1; the second end of the grounded capacitor C is grounded; the anode of the diode D1 is connected to the first end of the grounded capacitor.

[0052] In the preferred embodiment of the present invention, the switch tubes P1-P6 are triodes, so their control end is the base, the first end is the emitter, and the second end is the collector. In other preferred embodiments of the present invention, the switch tubes P1-P6 can also be selected as MOS tubes, IGBT tubes, etc., which all fall within the protection scope of the present invention. In the preferred embodiment of the present invention, the button 1 can also use its control switch, such as a relay, etc., which all fall within the protection scope of the present invention.

[0053] exist Figure 5 In the preferred embodiment shown, the built-in power supply module 300 further includes a resistor R3 and a resistor R4; the resistor R3 is connected between the first end and the output end of the comparator, the first end of the resistor R4 is connected to the cathode of the diode D1, and the second end is connected to the second end of the switch tube P5, the second end of the switch tube P6 and the control end of the switch tube P2. Of course, in the preferred embodiment of the utility model, these resistors can also be omitted.

[0054] exist Figure 5 In the preferred embodiment shown, the built-in power supply module 300 further includes a diode D2, a diode D3 and a charging management unit 320; the anode of the diode D2 receives the power supply voltage 12V-1, and the cathode is connected to the first end of the charging management unit 320, the anode of the diode D3 receives the power supply voltage 12V-2, and the cathode is connected to the first end of the charging management unit, and the second end of the charging management unit is connected to the second end of the switch tube P2. This part of the circuit is used to charge the supercapacitor through the power supply voltage 12V-1 and the power supply voltage 12V-2. In the simplified embodiment of the utility model, this part of the circuit can also be omitted. Here, the charging management unit 320 can also use any management chip known in the art, which will not be repeated here.

[0055] The built-in power supply module 300 is arranged inside the control system 100, and is used to provide the control system 100 with a power supply voltage of 12V-3 when there is no external power supply. The charging and discharging integrated machine has no power supply before the mains battery power supply module provides a DC power supply through, for example, the power battery of an electric vehicle. Therefore, in this embodiment, a supercapacitor is arranged inside the charging and discharging integrated machine as a power source before the charging and discharging integrated machine is turned on and the power battery of the electric vehicle provides energy. When the user presses button 1, the supercapacitor charges the grounding capacitor C, and the switch tube P5 is turned on. After the switch tube P5 is turned on, the switch tube P2 is turned on. At the same time, when the user presses button 1, the comparator works, and when the voltage of the supercapacitor exceeds the set threshold, the switch tube P3 is turned on, and the switch tube P1 is turned on. After the switch tube P1 and the switch tube P2 are turned on, the supercapacitor is connected to the DC / DC conversion unit 310 through the switch tube P1 and the switch tube P2 to output the power supply voltage 12V-3. The control system starts running. At this time, the MCU of the control system sets the MCU_G switch tube PIO pin high, that is, sends a high level to the control end of the switch tubes P4 and P6 to keep the switch tubes P4 and P6 turned on. At this time, release button 1, and the control system can run normally. When shutting down, the MCU of the control system sets the MCU_G switch tube PIO pin low, that is, sends a low level to the control end of the switch tubes P4 and P6, and the switch tubes P4 and P6 are turned off, so the switch tubes P1 and P2 are turned off, and the system shuts down.

[0056] The built-in power supply module composed of supercapacitors is used to disconnect the supercapacitor from the control system when the control system is shut down, thereby reducing the power consumption of the supercapacitor. At the same time, a comparator circuit is added when the button is pressed to set the minimum working voltage of the supercapacitor, so as to prevent the control system from restarting frequently when the power is insufficient, thereby improving the stability of the system. By adding a built-in power supply module composed of supercapacitors, when the charging and discharging integrated machine implements its charging function or its discharging function in real time and the electric vehicle provides power, the supercapacitor can be charged through the power supply voltage 12V-1 through the charging management unit 320. When the supercapacitor is low in power, the power bank can provide the control system with a power supply voltage 12V-2 through the TypeC interface. At the same time, the supercapacitor can also be charged through the power supply voltage 12V-2 through the charging management unit 320.

[0057] Figure 6 FIG. 1 is a schematic diagram of a power supply circuit of a preferred embodiment of the utility model providing a power supply voltage to a control system. Figure 6 As shown, the control system 12V power supply voltage is provided by the above-mentioned power supply voltage 12V-1, power supply voltage 12V-2 and power supply voltage 12V-3 through corresponding diodes in parallel.

[0058] The utility model provides a power supply control scheme for a portable integrated charging and discharging machine, so that the control system of the integrated charging and discharging machine can be normally started when using its charging function and discharging function. In particular, when using the discharging function, the provided super capacitor is used to provide capacitance, which can solve the problem of providing power when the electric vehicle does not output power.

[0059] In the utility model, first, when the charging and discharging all-in-one machine uses the charging function, the mains electricity can be used to provide a 12V DC power supply for the control system of the all-in-one machine after rectification and DC / DC conversion. Secondly, when the discharge function is used, the internally placed supercapacitor is used to provide power, or when the supercapacitor is insufficient, a power bank is used to provide power through an external TypeC interface, and the supercapacitor can be charged at the same time. The supercapacitor power supply circuit also provides a one-button switch circuit with voltage comparison. When shutting down, the supercapacitor is disconnected from the charging and discharging all-in-one machine to reduce the power consumption of the supercapacitor. And after using the charging function of the charging and discharging all-in-one machine or the electric car to provide power, the supercapacitor can be charged. Finally, when the control system is powered by a supercapacitor or TypeC, the control system of the charging and discharging all-in-one machine can communicate with the car, and when the electric car is discharged, the power provided by the electric car power battery is used, and after DC / DC conversion, the 12V DC power supply required by the control system of the charging and discharging all-in-one machine is output.

[0060] A further preferred embodiment of the utility model provides a charging and discharging integrated machine, including a control system and a power supply circuit for supplying power to the control system. Here, the power supply circuit can be constructed according to the aforementioned embodiment, and will not be described here. The charging and discharging integrated machine is preferably a portable electric vehicle charging and discharging integrated machine.

[0061] Although the present invention is described through specific embodiments, it should be understood by those skilled in the art that various changes and equivalent substitutions may be made to the present invention without departing from the scope of the present invention. In addition, various modifications may be made to the present invention for specific situations or materials without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed, but should include all implementation methods that fall within the scope of the claims of the present invention.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A power supply circuit for a charging and discharging integrated machine control system, characterized in that: Including mains battery power supply module, built-in power supply module and fast charging power supply module; The first end of the mains battery power supply module is connected to the mains, the second end is connected to the battery, and the third end is connected to the control system, and is used to convert the mains voltage into a first power supply voltage for powering the control system during charging, and convert the battery voltage into the first power supply voltage for powering the control system during discharging; The built-in power supply module is arranged inside the control system, and is used to provide a second power supply voltage for the control system when there is no external power supply; The first end of the fast charging power supply module is connected to the charging power supply, and the second end is connected to the control system, and is used to provide a third power supply voltage for the control system when the energy of the built-in power supply module is insufficient; The built-in power supply module includes a supercapacitor, a control switch, a comparator, a first DC / DC conversion unit, a grounding capacitor, a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a fifth switch tube and a sixth switch tube, a first diode, a first resistor and a second resistor; The supercapacitor is connected to the first end of the control switch and the first end of the first switch tube respectively; the second end of the control switch is connected to the first end of the grounded capacitor and the first end of the comparator via the first resistor respectively; the second end of the comparator receives the reference voltage and the output end is connected to the control end of the third switch tube; the first end of the third switch tube, the first end of the fourth switch tube, the first end of the fifth switch tube and the first end of the sixth switch tube are grounded; the second end of the third switch tube is connected to the control end of the first switch tube and the second end of the fourth switch tube; the control end of the fourth switch tube and the control end of the sixth switch tube respectively receive the control signal of the control system; the second end of the first switch tube is connected to the first end of the second switch tube, the second end of the second switch tube is connected to the first end of the first DC / DC conversion unit, and the second end of the first DC / DC conversion unit outputs the second power supply voltage; the control end of the fifth switch tube is connected to the first end of the grounded capacitor, and the second end is connected to the second end of the sixth switch tube, the control end of the second switch tube and the cathode of the first diode; the second end of the grounded capacitor is grounded; the anode of the first diode is connected to the first end of the grounded capacitor.

2. The power supply circuit for the control system of the charging and discharging integrated machine according to claim 1, characterized in that: The built-in power supply module further includes a third resistor and a fourth resistor; The third resistor is connected between the first end and the output end of the comparator, the first end of the fourth resistor is connected to the cathode of the first diode, and the second end is connected to the second end of the fifth switch tube, the second end of the sixth switch tube and the control end of the second switch tube.

3. The power supply circuit for the control system of the charging and discharging integrated machine according to claim 1, characterized in that: The built-in power supply module further includes a second diode, a third diode and a charging management unit; the anode of the second diode receives the first power supply voltage, and the cathode is connected to the first end of the charging management unit, the anode of the third diode receives the second power supply voltage, and the cathode is connected to the first end of the charging management unit, and the second end of the charging management unit is connected to the second end of the second switch tube.

4. The power supply circuit for a charging and discharging integrated machine control system according to any one of claims 1 to 3, characterized in that: The mains battery power supply module includes a single-phase active PFC unit, a second DC / DC conversion unit and a third DC / DC conversion unit; The first end of the single-phase active PFC unit receives the mains voltage, and the second end is respectively connected to the first end of the second DC / DC conversion unit and the first end of the third DC / DC conversion unit; the second end of the third DC / DC conversion unit is connected to the battery; and the second end of the second DC / DC conversion unit outputs the first power supply voltage.

5. The power supply circuit for a charging and discharging integrated machine control system according to any one of claims 1 to 3, characterized in that: The fast charging power supply module includes a fast charging interface and a fourth DC / DC conversion unit; the first end of the fourth DC / DC conversion unit is connected to the charging power supply through the fast charging interface, and the second end outputs the third power supply voltage.

6. The power supply circuit for the control system of the integrated charging and discharging machine according to claim 5, characterized in that: The fast charging interface is a Type C interface.

7. A charging and discharging integrated machine, characterized in that: It includes a control system and a power supply circuit for supplying power to the control system; the power supply circuit includes a mains battery power supply module, a built-in power supply module and a fast charging power supply module; The first end of the mains battery power supply module is connected to the mains, the second end is connected to the battery, and the third end is connected to the control system, and is used to convert the mains voltage into a first power supply voltage for powering the control system during charging, and convert the battery voltage into the first power supply voltage for powering the control system during discharging; The built-in power supply module is arranged inside the control system, and is used to provide a second power supply voltage for the control system when there is no external power supply; The first end of the fast charging power supply module is connected to the charging power supply, and the second end is connected to the control system, and is used to provide a third power supply voltage for the control system when the energy of the built-in power supply module is insufficient; The built-in power supply module includes a super capacitor, a control switch, a comparator, a first DC / DC conversion unit, a grounding capacitor, a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a fifth switch tube and a sixth switch tube, a first diode, a first resistor and a second resistor; the super capacitor is respectively connected to the first end of the control switch and the first end of the first switch tube, the second end of the control switch is respectively connected to the first end of the grounding capacitor and the first end of the comparator via the first resistor, the second end of the comparator receives a reference voltage, and the output end is connected to the control end of the third switch tube; the first end of the third switch tube, the first end of the fourth switch tube, the first end of the fifth switch tube and the first end of the sixth switch tube are grounded; The second end of the third switch tube is connected to the control end of the first switch tube and the second end of the fourth switch tube; the control end of the fourth switch tube and the control end of the sixth switch tube respectively receive control signals of the control system; the second end of the first switch tube is connected to the first end of the second switch tube, the second end of the second switch tube is connected to the first end of the first DC / DC conversion unit, and the second end of the first DC / DC conversion unit outputs the second power supply voltage; the control end of the fifth switch tube is connected to the first end of the grounded capacitor, and the second end is connected to the second end of the sixth switch tube, the control end of the second switch tube and the cathode of the first diode; the second end of the grounded capacitor is grounded; and the anode of the first diode is connected to the first end of the grounded capacitor.

8. The charging and discharging integrated machine according to claim 7, characterized in that: The mains battery power supply module includes a single-phase active PFC unit, a second DC / DC conversion unit and a third DC / DC conversion unit; the first end of the single-phase active PFC unit receives the mains voltage, and the second end is respectively connected to the first end of the second DC / DC conversion unit and the first end of the third DC / DC conversion unit; the second end of the third DC / DC conversion unit is connected to the battery; the second end of the second DC / DC conversion unit outputs the first power supply voltage; The fast charging power supply module includes a fast charging interface and a fourth DC / DC conversion unit; the first end of the fourth DC / DC conversion unit is connected to the charging power supply through the fast charging interface, and the second end outputs the third power supply voltage.

9. The integrated charging and discharging device according to claim 8, characterized in that: The built-in power supply module further includes a second diode, a third diode and a charging management unit; the anode of the second diode receives the first power supply voltage, and the cathode is connected to the first end of the charging management unit, the anode of the third diode receives the second power supply voltage, and the cathode is connected to the first end of the charging management unit, and the second end of the charging management unit is connected to the second end of the second switch tube.

Images