Electric vehicle power supply equipment and power backup device

Abstract

The utility model provides electric vehicle power supply equipment and an electric power backup device, which can provide electric energy for a communication circuit of the electric vehicle power supply equipment when a power grid is in power failure or an electric vehicle cannot reversely supply power, so as to maintain the communication function of the electric vehicle power supply equipment. The electric vehicle power supply equipment comprises a battery, a safety protection circuit, a control circuit, a discharge circuit, an output switching circuit, a control guide circuit and an auxiliary discharge circuit. The safety protection circuit provides a power failure indication signal based on the positive charging gun power supply voltage and the negative charging gun power supply voltage. The control guide circuit judges whether the charging gun is connected with the electric vehicle or not to provide control guide information based on the guide power supply voltage. The control circuit provides a discharge control signal based on the power failure indication signal and the control guidance information. The discharge circuit, the output switching circuit and the auxiliary discharge circuit convert the battery voltage into a guide power supply voltage or a positive power supply equipment power supply voltage and a negative power supply equipment power supply voltage.

Description

TECHNICAL FIELD

[0001] The utility model relates to an electric vehicle power supply equipment, especially an electric vehicle power supply equipment with a battery backup module and a power backup device. BACKGROUND

[0002] In addition to charging electric vehicles, bidirectional electric vehicle supply equipment (EVSE, also known as charging piles) can also use the power of electric vehicles to supply power to the grid or households when the grid is powered off. However, when the grid is powered off, the electric vehicle power supply equipment loses its power source, causing the electric vehicle power supply equipment to malfunction, making it impossible for the electric vehicle power supply equipment to communicate with the electric vehicle and / or user devices. SUMMARY

[0003] The utility model provides a kind of electric vehicle power supply equipment and its battery backup method, can provide electric energy to the communication circuit of electric vehicle power supply equipment when grid outage / electric vehicle cannot reverse power supply, to maintain the communication function of electric vehicle power supply equipment.

[0004] The electric vehicle power supply equipment of the utility model, including battery, safety protection circuit, control circuit, discharge circuit, output switching circuit, control guide circuit and auxiliary discharge circuit. Battery has positive battery end and negative battery end. Safety protection circuit receives positive charging gun power supply voltage and negative charging gun power supply voltage, to provide power-off indication signal based on positive charging gun power supply voltage and negative charging gun power supply voltage. Control circuit is coupled with safety protection circuit, to receive power-off indication signal, and provide discharge control signal based on power-off indication signal and control guide information. Discharge circuit is coupled with control circuit, positive battery end and negative battery end, and receives discharge control signal, to convert battery voltage of battery into output power supply voltage based on discharge control signal. Output switching circuit is coupled with control circuit and discharge circuit, to receive supply target signal from control circuit, and receive output power supply voltage from discharge circuit, wherein output switching circuit provides output power supply voltage as guide power supply voltage or positive power supply equipment power supply voltage based on supply target signal. Control guide circuit is coupled with control circuit and output switching circuit, to receive guide power supply voltage, and judge whether charging gun is connected with electric vehicle based on guide power supply voltage, to provide control guide information to control circuit. Auxiliary discharge circuit is coupled with output switching circuit, to receive positive power supply equipment power supply voltage, and provide negative power supply equipment power supply voltage. Positive charging gun power supply voltage and negative charging gun power supply voltage are received from power conversion circuit or connected electric vehicle.

[0005] The utility model discloses a kind of electric power backup devices, including battery module, power conversion circuit, output circuit and control circuit.Power conversion circuit is electrically connected with battery module.Output circuit is electrically connected with power conversion circuit.Control circuit is electrically connected with battery module, power conversion circuit and output circuit.Control circuit receives state indication signal from outside and controls battery module to discharge, or controls power conversion circuit to charge battery module.

[0006] Based on the above, in the electric vehicle power supply equipment and the electric power backup device of the utility model embodiment, since the safety protection circuit provides power failure indication signal based on positive charging gun power supply voltage and negative charging gun power supply voltage, the control guide circuit judges whether charging gun is connected with electric vehicle based on guide power supply voltage to provide control guide information, and the control circuit provides discharge control signal based on power failure indication signal and control guide information, therefore when safety protection circuit reacts that positive charging gun power supply voltage and negative charging gun power supply voltage are not received through power failure indication signal and control guide circuit reacts that charging gun is connected with electric vehicle through control guide information, battery voltage is converted into positive power supply equipment power supply voltage and negative power supply equipment power supply voltage, to supply communication circuit of electric vehicle power supply equipment, and communication function of electric vehicle power supply equipment is maintained.

[0007] In order to make the above features and advantages of the utility model more obvious and easy to understand, the following examples are taken, and the detailed description is as follows in conjunction with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 It is the circuit schematic diagram of electric vehicle power supply equipment according to the utility model embodiment;

[0009] Figure 2 It is the circuit schematic diagram of charging circuit according to the utility model embodiment;

[0010] Figure 3 It is the circuit schematic diagram of discharge circuit and output switching circuit according to the utility model embodiment;

[0011] Figure 4 It is the circuit schematic diagram of auxiliary discharge circuit according to the utility model embodiment;

[0012] Figure 5 It is the circuit schematic diagram of control circuit according to the utility model embodiment;

[0013] Figure 6 It is the circuit schematic diagram of monitoring circuit according to the utility model embodiment;

[0014] Figure 7 It is the flow chart of battery backup method of electric vehicle power supply equipment according to the utility model embodiment. DETAILED DESCRIPTION

[0015] Figure 1 is a circuit schematic diagram of the power supply device for electric vehicle according to an embodiment of the present utility model. Please refer to Figure 1 In the present embodiment, the power supply device 100 for electric vehicle comprises, for example, a communication circuit 101, a safety protection circuit 110, a control circuit 120, a charging circuit 130, a battery (or battery module) 140, a control pilot circuit 150, a discharging circuit 160, an output switching circuit 170, an auxiliary discharging circuit 180, and a monitoring circuit 190, wherein the control circuit 120, the charging circuit 130, the battery 140, the discharging circuit 160, the output switching circuit 170, the auxiliary discharging circuit 180, and the monitoring circuit 190 constitute a battery backup system / solution BPS, and the safety protection circuit 110, the control circuit 120, and the control pilot circuit 150 can operate by receiving a circuit power supply voltage VPcc (for example, +5 volts).

[0016] The battery 140 has a positive battery terminal +VBAT and a negative battery terminal -VBAT, and has a battery voltage BAT_VP. The safety protection circuit 110 receives a positive charging gun power supply voltage +VP1 (for example, +12 volts) and a negative charging gun power supply voltage -VP1 (for example, -12 volts) provided from the power conversion circuit 10 or the connected electric vehicle CARev, to provide a blackout indication signal Blackout based on the positive charging gun power supply voltage +VP1 and the negative charging gun power supply voltage -VP1, wherein the power conversion circuit 10 is used to convert the alternating current Vac (for example, 240 volts) transmitted / provided by the power grid Grid into the positive charging gun power supply voltage +VP1 and the negative charging gun power supply voltage -VP1.

[0017] The control circuit 120 is coupled to the safety protection circuit 110 and the control pilot circuit 150 to receive the blackout indication signal Blackout and the pilot signal CP_ADC, and to provide a discharging control signal Discharge based on the blackout indication signal Blackout and the pilot signal CP_ADC. The discharging circuit 160 is coupled to the control circuit 120, the positive battery terminal +VBAT and the negative battery terminal -VBAT, and receives the discharging control signal Discharge, to convert the battery voltage BAT_VP of the battery 140 into an output power supply voltage VPout (for example, +12 volts) based on the discharging control signal Discharge.

[0018] The output switching circuit 170 is coupled to the control circuit 120 and the discharge circuit 160 for receiving the supply target signal SupplyTarget from the control circuit 120 and receiving the output supply voltage VPout from the discharge circuit 160, wherein the output switching circuit 170 is configured to provide the output supply voltage VPout as a default pilot supply voltage +CP_VP or switch to provide a positive supply equipment voltage +VP2 based on the supply target signal SupplyTarget, wherein the pilot supply voltage +CP_VP is provided to the electric vehicle CARev when the charging gun Gev is connected to the electric vehicle CARev, such that the voltage level of the pilot supply voltage +CP_VP is decreased, and thus the change of the voltage level of the pilot supply voltage +CP_VP can reflect the connection of the charging gun Gev to the electric vehicle CARev.

[0019] The control pilot circuit 150 is coupled to the safety protection circuit 110, the control circuit 120 and the output switching circuit 170, and receives the pulse modulation signal PWM provided by the safety protection circuit 110 for operating based on the pulse modulation signal PWM. Also, the control pilot circuit 150 receives the pilot supply voltage +CP_VP from the output switching circuit 170, and determines whether the charging gun Gev is connected to the electric vehicle CARev based on the pilot supply voltage +CP_VP for correspondingly providing a pilot signal CP_ADC to transmit control pilot information to the control circuit 120.

[0020] Then, the control circuit 120 correspondingly provides the supply target signal SupplyTarget based on the control pilot information transmitted by the pilot signal CP_ADC for controlling the output switching circuit 170 to provide the pilot supply voltage +CP_VP for determining the connection of the charging gun Gev to the electric vehicle CARev, and after the charging gun Gev is connected to the electric vehicle CARev, the control circuit 120 controls the output switching circuit 170 to provide the positive supply equipment voltage +VP2.

[0021] The auxiliary discharge circuit 180 is coupled to the output switching circuit 170 for receiving the positive supply equipment voltage +VP2 (e.g. +12 volts) and providing a negative supply equipment voltage -VP2 (e.g. -12 volts) based on the positive supply equipment voltage +VP2, wherein the positive supply equipment voltage +VP2 provides the negative supply equipment voltage -VP2 which can be provided to the communication circuit 101 for activating the communication function of the electric vehicle supply equipment (EVSE).

[0022] According to the above, when the grid Grid is powered off, the battery backup system / solution BPS can temporarily provide at least power to the communication circuit 101 of the electric vehicle supply equipment 100 for maintaining the communication function of the electric vehicle supply equipment 100.

[0023] In the embodiment of the utility model, through supply target signal SupplyTarget, battery 140 provides guide power voltage + CP_VP, is used for judging whether charging gun Gev is connected with electric vehicle CARev, this state can avoid that battery 140 is overdrawn. After charging gun Gev is connected with electric vehicle CARev, guide power voltage + CP_VP can be reduced from +12 volts (corresponding power level) power level to +9 volts (corresponding predetermined level). In other words, when guide power voltage + CP_VP is reduced from power level to predetermined level, control guide circuit 150 judges that charging gun is connected with electric vehicle CARev, and when guide power voltage + CP_VP is maintained at power level, control guide circuit 150 judges that charging gun is not connected with electric vehicle CARev.

[0024] In the embodiment of the utility model, communication circuit 101 can be an independent component or integrated into other components, which depends on circuit design, and the embodiment of the utility model is not limited thereto.

[0025] In the embodiment, control circuit 120 can provide charging control signal Charge based on blackout indication signal Blackout, and charging circuit 130 is coupled with positive battery end + VBAT and negative battery end - VBAT, and is further coupled with control circuit 120 to receive charging control signal Charge and receive positive charging gun power voltage + VP1 from power conversion circuit 10 (or electric vehicle CARev), wherein charging circuit 130 charges battery 140 using positive charging gun power voltage + VP1 based on charging control signal Charge.

[0026] In the embodiment, when blackout indication signal Blackout indicates that safety protection circuit 110 does not receive positive charging gun power voltage + VP1 and negative charging gun power voltage - VP1 and guide signal CP_ADC indicates that charging gun Gev is connected with electric vehicle CARev, control circuit 120 provides discharge control signal Discharge, otherwise, when blackout indication signal Blackout indicates that safety protection circuit 110 receives positive charging gun power voltage + VP1 and negative charging gun power voltage - VP1, control circuit 120 provides charging control signal Charge. In other words, in the state of power grid Grid power supply or when electric vehicle CARev reversely supplies power, control circuit 120 receives blackout indication signal Blackout from safety protection circuit 110, indicating that there is power, at this time, control circuit 120 can drive charging circuit 130 to start charging battery 140.

[0027] In the embodiment, the monitoring circuit 190 can monitor the voltage, charge / discharge current, temperature, battery power and state of health information of the battery 140, and the state of health is low, and the information is returned to remind the user to replace the battery 140. Further, the monitoring circuit 190 is coupled to the battery 140 and the control circuit 120, to monitor the battery voltage BAT_VP, charge / discharge current, battery temperature, battery power and battery state of health information of the battery 140, wherein the battery power and battery state of health information can be calculated based on the battery voltage BAT_VP, charge / discharge current and battery temperature. And when the battery state of health information indicates that the state of health of the battery 140 is low, the battery state of health information is transmitted to the safety protection circuit 110 through the control circuit 120, so as to send the battery alarm signal BAT_Alt to at least one of the user device (not shown) and the electric vehicle CARev through the safety protection circuit 110.

[0028] In the embodiment of the utility model, the battery voltage BAT_VP can be detected / transmitted by the battery voltage signal BAT_Voltage, the charge / discharge current of the battery 140 can be detected / transmitted by the battery current signal BAT_Current, and the battery temperature of the battery 140 can be detected / transmitted by the battery temperature signal BAT_TEMP, but the embodiment of the utility model is not limited thereto.

[0029] In the embodiment of the utility model, the monitoring circuit 190 transmits the battery state of health information to the control circuit 120 through the first serial communication signal SXE1, and the control circuit 120 transmits the battery state of health information to the safety protection circuit 110 through the second serial communication signal SXE2.

[0030] In the embodiment of the utility model, the first serial communication signal SXE1 includes an inter-integrated circuit (I2C) signal, and the second serial communication signal SXE2 includes a universal asynchronous receiver / transmitter (UART) signal.

[0031] In the embodiment of the utility model, the battery backup system / solution BPS (i.e. power backup device) at least includes the control circuit 120, the battery (or battery module) 140, the power conversion circuit (such as the charging circuit 130 and the discharging circuit 160), the output circuit (such as the output switching circuit 170 and the auxiliary discharging circuit 180).

[0032] The power conversion circuits (i.e. the charging circuit 130 and the discharging circuit 160) are electrically connected to the battery (or battery module) 140. The output circuits (i.e. the output switching circuit 170 and the auxiliary discharging circuit 180 and their output paths electrically connected to the electric vehicle CARev) are electrically connected to the power conversion circuits (i.e. the charging circuit 130 and the discharging circuit 160). The control circuit 120 is electrically connected to the battery (or battery module) 140, the power conversion circuits (i.e. the charging circuit 130 and the discharging circuit 160) and the output circuits (i.e. the output switching circuit 170 and the auxiliary discharging circuit 180 and their output paths electrically connected to the electric vehicle CARev).

[0033] The control circuit 120 receives a status indication signal (e.g. the blackout signal) from outside the battery backup system / solution BPS (i.e. the power backup device) to control the battery (or battery module) 140 to discharge or to control the charging circuit 130 in the power conversion circuits to charge the battery (or battery module) 140.

[0034] The charging circuit 130 (corresponding to the first power converter) and the discharging circuit 160 (corresponding to the second power converter) are electrically connected to the battery (or battery module) 140 and the control circuit 120, respectively. When the status indication signal (i.e. the blackout signal) represents that the safety protection circuit 110 receives the positive charging gun power voltage +VPl and the negative charging gun power voltage -VPl (corresponding to the first status), the charging circuit 130 (corresponding to the first power converter) receives the positive charging gun power voltage +VPl (corresponding to the first power source) and charges the battery (or battery module) 140. When the status indication signal (i.e. the blackout signal) represents that the safety protection circuit 110 does not receive the positive charging gun power voltage +VPl and the negative charging gun power voltage -VPl (corresponding to the second status), the battery (or battery module) 14 discharges the discharging circuit 160 (corresponding to the second power converter).

[0035] The output switching circuit 170 (corresponding to the selection circuit) is electrically connected with the discharging circuit 160 (corresponding to the second power converter). When the state indication signal (i.e. the blackout indication signal) represents the second state (i.e. the safety protection circuit 110 does not receive the positive charging gun power voltage +VP1 and the negative charging gun power voltage -VP1), the output switching circuit 170 (corresponding to the selection circuit) electrically connects the discharging circuit 160 to the output path (i.e. the first output path) providing the pilot power voltage +CP_VP, and determines whether the output switching circuit 170 in the output circuit is electrically connected with the electric vehicle CARev (corresponding to the load). When the output switching circuit 170 in the output circuit is electrically connected with the electric vehicle CARev (corresponding to the load), the output switching circuit 170 (corresponding to the selection circuit) electrically connects the discharging circuit 160 to the output path (corresponding to the second output path) providing the positive power supply device power voltage +VP2 and the negative power supply device power voltage -VP2, and the positive power supply device power voltage +VP2 and the negative power supply device power voltage -VP2 can be provided to the electric vehicle CARev (corresponding to the load) as electric power.

[0036] Figure 2 is a circuit schematic diagram of a charging circuit according to an embodiment of the present application. Please refer to Figure 1 and Figure 2 In this embodiment, the charging circuit 130 is exemplified by the charging circuit 130a, and the charging circuit 130a includes, for example, a buck converter circuit 210, a filter circuit 220, an overvoltage protection circuit 230, a dummy load circuit 240, and a feedback circuit 250.

[0037] The buck converter circuit 210 receives the positive charging gun power voltage +VP1, a charging control signal Charge, and a feedback voltage Vfb, starts based on the charging control signal Charge, and converts the positive charging gun power voltage +VP1 based on the feedback voltage Vfb to provide a buck power voltage VPbuck. The filter circuit 220 is coupled to the buck converter circuit 210 to receive the buck power voltage VPbuck, and provides a charging power voltage VPcharge after filtering.

[0038] The feedback circuit 250 is coupled to the negative battery terminal -VBAT and the buck converter circuit 210 to provide the feedback voltage Vfb. The overvoltage protection circuit 230 is coupled between the filter circuit 220 and the positive battery terminal +VBAT to turn on and off the charging power voltage VPcharge and the positive battery terminal +VBAT based on the charging power voltage VPcharge. The dummy load circuit 240 is coupled to the positive battery terminal +VBAT and receives a dummy load signal Dummy from the control circuit 120 to discharge the battery 140 in response to the dummy load signal Dummy.

[0039] In this embodiment, the step-down conversion circuit 210 includes, for example, a step-down circuit chip 211, resistors R01 and R02, and capacitors C01 and C02. The step-down circuit chip 211 has a power voltage input terminal VIN (corresponding to a first power voltage input terminal) receiving a positive charging gun power voltage +VP1, an enable input terminal EN (corresponding to a first enable input terminal) receiving a charging control signal Charge, a bootstrap terminal VBST (corresponding to a first bootstrap terminal), a switch node terminal SW (corresponding to a first switch node terminal) providing a step-down power voltage VPbuck, a step-down feedback terminal VFB receiving a feedback voltage Vfb, and a ground terminal GND coupled to a ground voltage SGND.

[0040] The resistor R01 (corresponding to a first resistor) is coupled between a system power voltage VPPS (e.g., +12 volts) and the power voltage input terminal VIN of the step-down circuit chip 211. The capacitor C01 (corresponding to a first capacitor) is coupled between the power voltage input terminal VIN of the step-down circuit chip 211 and the ground voltage SGND. The resistor R02 (corresponding to a second resistor) is coupled between the enable input terminal EN of the step-down circuit chip 211 and the ground voltage SGND. The capacitor C02 (corresponding to a second capacitor) is coupled between the bootstrap terminal VBST of the step-down circuit chip 211 and the switch node terminal SW of the step-down circuit chip 211. Through the step-down conversion circuit 210 performs step-down on the positive charging gun power voltage +VP1 via the step-down circuit chip 211.

[0041] In this embodiment, the filter circuit 220 includes, for example, inductors L11 and L12, and a capacitor C11. The inductor L11 (corresponding to a first inductor) and the inductor L12 (corresponding to a second inductor) are connected in series between the step-down power voltage VPbuck and the charging power voltage VPcharge. The capacitor C11 (corresponding to a third capacitor) is coupled between a connection point between the inductor L11 and the inductor L12 and the ground voltage SGND.

[0042] In this embodiment, the feedback circuit 250 includes, for example, a differential amplifier chip 251, resistors R21 to R26, and capacitors C21 and C22. The differential amplifier chip 251 has an output terminal VOUT, a positive input terminal +IN, a negative input terminal -IN, a positive power terminal V+ receiving a circuit power voltage VPcc, and a negative power terminal V- coupled to the ground voltage SGND.

[0043] The resistor R21 (corresponding to a third resistor) is coupled between the feedback voltage Vfb and the output terminal VOUT. The capacitor C21 (corresponding to a fourth capacitor) is coupled between the output terminal VOUT and the ground voltage SGND. The resistor R22 (corresponding to a fourth resistor) is coupled between the output terminal VOUT and the negative input terminal -IN. The capacitor C22 (corresponding to a fifth capacitor) is coupled between the output terminal VOUT and the negative input terminal -IN. The resistor R23 (corresponding to a fifth resistor) is coupled between the positive input terminal +IN and the ground voltage SGND. The resistor R24 (corresponding to a sixth resistor) is coupled between the positive input terminal +IN and the negative battery terminal -VBAT. The resistor R25 (corresponding to a seventh resistor) is coupled between the negative battery terminal -VBAT and the ground voltage SGND. The resistor R26 (corresponding to an eighth resistor) is coupled between the negative input terminal -IN and the ground voltage SGND. Here, the constant current charging mode is designed by the feedback circuit 250 so that the charging current of the battery 140 is kept stable.

[0044] In this embodiment, the overvoltage protection circuit 230 includes, for example, a Zener shunt regulator DCReg, resistors R31-R34, transistors M31-M32, and a diode D31. The Zener shunt regulator DCReg has an anode coupled to the ground voltage SGND, a cathode, and a reference terminal. The resistor R31 (corresponding to a ninth resistor) is coupled between the charging power supply voltage VPcharge and the reference terminal of the Zener shunt regulator DCReg. The resistor R32 (corresponding to a tenth resistor) is coupled between the reference terminal of the Zener shunt regulator DCReg and the ground voltage SGND. The resistor R33 (corresponding to an eleventh resistor) is coupled between the charging power supply voltage VPcharge and the cathode of the Zener shunt regulator DCReg. The transistor M31 (corresponding to a first transistor) has a first terminal receiving the charging power supply voltage VPcharge, a control terminal coupled to the cathode of the Zener shunt regulator DCReg, and a second terminal. The transistor M32 (corresponding to a second transistor) has a first terminal receiving the charging power supply voltage VPcharge, a control terminal coupled to the second terminal of the transistor M31, and a second terminal. The resistor R34 (corresponding to a twelfth resistor) is coupled between the second terminal of the transistor M31 and the ground voltage SGND. The diode D31 (corresponding to a first diode) has an anode coupled to the second terminal of the transistor M31 and a cathode coupled to the positive battery terminal +VBAT. By the overvoltage protection circuit 230, when the battery 140 is removed or not installed properly, the charging power supply voltage VPcharge is increased, and the overvoltage protection circuit 230 is turned off to protect the circuit components.

[0045] In this embodiment, the dummy load circuit 240, for example, includes a diode D41, a transistor M41, resistors R41, R42, and a capacitor C41. The diode D41 (corresponding to a second diode) has an anode coupled to the positive battery terminal +VBAT, and a cathode receiving the circuit power voltage Vpcc. The transistor M41 (corresponding to a third transistor) has a first terminal, a control terminal receiving a dummy load signal Dummy, and a second terminal receiving a ground voltage SGND. The resistor R41 (corresponding to a thirteenth resistor) is coupled between the positive battery terminal +VBAT and the first terminal of the transistor M41. The resistor R42 (corresponding to a fourteenth resistor) is coupled between the ground voltage SGND and the control terminal of the transistor M41. The capacitor C41 (corresponding to a sixth capacitor) is coupled between the circuit power voltage Vpcc and the ground voltage SGND. By the dummy load circuit 240, when the state of health of the battery 140 is monitored, the dummy load circuit 240 is activated to discharge the battery 40 to estimate the capacity of the battery 40.

[0046] Figure 3 is a circuit schematic diagram of a discharging circuit and an output switching circuit according to an embodiment of the present application. Please refer to Figure 1 and Figure 3 In this embodiment, the discharging circuit 160, for example, takes the discharging circuit 160a as an example, and the discharging circuit 160a, for example, includes a boost circuit chip 161, capacitors C51-C57, an inductor L51, and resistors R51-R57.

[0047] The boost circuit chip 161 has a power voltage input terminal VIN (corresponding to a second power voltage input terminal) coupled to the positive battery terminal +VBAT, a power input terminal VCC, an enable input terminal EN (corresponding to a second enable input terminal) receiving a discharging control signal Discharge, a switching frequency terminal FREQ, a current limit terminal ILIM receiving a bootstrap current limit signal Boost_ILMT, a mode / synchronization terminal MODE / SYNC, a power good terminal PG, a thermal via pad terminal THVIA1-THVIA5, THPAD, a ground terminal GND coupled to the ground voltage SGND, a bootstrap terminal BST (corresponding to a second bootstrap terminal), a switch node terminal SW (corresponding to a second switch node terminal), a voltage output terminal VO providing an output power voltage VPout, an external coupling terminal OUT, a boost feedback terminal FB, and a voltage comparison terminal COMP (corresponding to a first voltage comparison terminal).

[0048] Capacitor C51 (corresponding to a seventh capacitor) is coupled between a positive battery terminal +VBAT and a ground voltage SGND. Capacitor C52 (corresponding to an eighth capacitor) is coupled between the positive battery terminal +VBAT and the ground voltage SGND, where a type of the capacitor C51 is different from a type of the capacitor C52, for example. Capacitor C53 is coupled between a power input terminal VCC and the ground voltage SGND. Resistor R51 is coupled between a switching frequency terminal FREQ and the ground voltage SGND. Resistor R52 is coupled between a mode / sync terminal MODE / SYNC and the ground voltage SGND. Resistor R53 is coupled between the power input terminal VCC and an output power normal terminal PG. Capacitor C54 is coupled between the power input terminal VCC and the ground voltage SGND.

[0049] Capacitor C55 (corresponding to a ninth capacitor) is coupled between a bootstrap terminal BST of the boost circuit chip 161 and a switch node terminal SW of the boost circuit chip 161. Inductor L51 (corresponding to a third inductor) is coupled between the positive battery terminal +VBAT and the switch node terminal SW of the boost circuit chip 161. Resistors R54 (corresponding to a fifteenth resistor) and R55 (corresponding to a sixteenth resistor) are coupled in series between an output power voltage VPout and a ground voltage SGND. Resistor R56 (corresponding to a seventeenth resistor) is coupled between a boost feedback terminal FB and a connection point between the fifteenth resistor R15 and the sixteenth resistor R55. Capacitor C54 (corresponding to a tenth capacitor) and resistor R57 (corresponding to an eighteenth resistor) are coupled in series between a voltage comparison terminal COMP of the boost circuit chip 161 and the ground voltage SGND.

[0050] In the present embodiment, the output switching circuit 170 is exemplified by the output switching circuit 170a, for example, and the output switching circuit 170a includes capacitors C61-C66, transistors M61-M65, a diode D61, and resistors R61-R66, for example. Capacitor C61 (corresponding to an eleventh capacitor) is coupled between an output power voltage VPout and a ground voltage SGND. Capacitor C62 (corresponding to a twelfth capacitor) is coupled between the output power voltage VPout and the ground voltage SGND, where a type of the capacitor C61 is different from a type of the capacitor C62, for example.

[0051] Transistor M61 (corresponding to a fourth transistor) has a first terminal receiving the output power voltage VPout, a control terminal, and a second terminal. Resistor R61 (corresponding to a nineteenth resistor) is coupled between the first terminal of the transistor M61 and the control terminal of the transistor M61. Capacitor C63 (corresponding to a thirteenth capacitor) is coupled between the second terminal of the transistor M61 and the control terminal of the transistor M61. Diode D61 (corresponding to a third diode) has an anode A_D61 coupled to the second terminal of the transistor M61, and a cathode providing a positive power supply voltage +VP2.

[0052] The transistor M62 (corresponding to the fifth transistor) has a first terminal, a control terminal, and a second terminal coupled to the ground voltage SGND. The resistor R62 (corresponding to the twentieth resistor) is coupled between the control terminal of the transistor M61 and the first terminal of the transistor M62. The resistor R63 (corresponding to the twenty-first resistor) is coupled between the supply target signal SupplyTarget and the control terminal of the transistor M62. The capacitor C64 (corresponding to the fourteenth capacitor) is coupled between the control terminal of the transistor M62 and the second terminal of the transistor M62.

[0053] The transistor M63 (corresponding to the sixth transistor) has a first terminal, a control terminal, and a second terminal coupled to the ground voltage SGND. The resistor R64 (corresponding to the twenty-second resistor) is coupled between the supply target signal SupplyTarget and the control terminal of the transistor M63. The resistor R65 (corresponding to the twenty-third resistor) is coupled between the output power voltage VPout and the first terminal of the transistor M63. The capacitor C65 (corresponding to the fifteenth capacitor) is coupled between the control terminal of the transistor M63 and the second terminal of the transistor M63.

[0054] The transistor M64 (corresponding to the seventh transistor) has a first terminal receiving the output power voltage VPout, a control terminal, and a second terminal providing the guided power voltage +CP_VP. The resistor R66 (corresponding to the twenty-fourth resistor) is coupled between the first terminal of the transistor M64 and the control terminal of the transistor M64. The capacitor C66 (corresponding to the sixteenth capacitor) is coupled between the second terminal of the transistor M64 and the ground voltage SGND. The transistor M65 (corresponding to the eighth transistor) has a first terminal coupled to the control terminal of the transistor M64, a control terminal coupled to the first terminal of the transistor M64, and a second terminal coupled to the ground voltage SGND.

[0055] Figure 4 is a circuit schematic diagram of an auxiliary discharge circuit according to an embodiment of the present application. Please refer to Figure 1 , Figure 3 and Figure 4 In the present embodiment, the auxiliary discharge circuit 180 takes the auxiliary discharge circuit 180a as an example, and the auxiliary discharge circuit 180a includes, for example, a buck-boost circuit chip 181, capacitors C71-C73, resistors R71-R73, an inductor L71, and a diode D71. The buck-boost circuit chip 181 has an unconnected terminal NC, a current-limiting detection input terminal IPK, an internal voltage-stabilized output terminal VCCO coupled to the anode A_D61 of the diode D61, a voltage comparison terminal COMP (corresponding to the second voltage comparison terminal), an internal switch collector terminal SWC coupled to the current-limiting detection input terminal IPK, an internal switch emitter terminal SWE, a timing capacitor terminal TCAP, and a ground terminal GND coupled to the ground voltage SGND.

[0056] The capacitor C71 (corresponding to the seventeenth capacitor) is coupled between the anode A_D61 of the diode D61 and the ground voltage SGND. The resistor R71 (corresponding to the twenty-fifth resistor) is coupled between the anode A_D61 of the diode D61 and the current limit detection input terminal IPK. The resistor R72 (corresponding to the twenty-sixth resistor) is coupled between the voltage comparison terminal COMP of the buck-boost circuit chip 181 and the ground voltage SGND. The resistor R73 (corresponding to the twenty-seventh resistor) is coupled between the voltage comparison terminal COMP of the buck-boost circuit chip 181 and the negative power supply device power voltage -VP2.

[0057] The capacitor C72 (corresponding to the eighteenth capacitor) is coupled between the timing capacitor terminal TCAP and the negative power supply device power voltage -VP2. The inductor L71 (corresponding to the fourth inductor) is coupled between the internal switch emitter terminal SWE and the ground voltage SGND. The diode D71 (corresponding to the fourth diode) has an anode coupled to the negative power supply device power voltage -VP2, and a cathode coupled to the internal switch emitter terminal SWE. The capacitor C73 (corresponding to the nineteenth capacitor) is coupled between the negative power supply device power voltage -VP2 and the ground voltage SGND.

[0058] According to the above, when the external power grid Grid is powered off, the guide power voltage +CP_VP and the positive power supply device power voltage +VP2 are provided based on the power of the battery 140 through the discharging circuit 160a and the output switching circuit 170. Among them, the discharging circuit 160a converts the battery voltage BAT_VP of the battery 140 into the output power voltage VPout. The output switching circuit 170 provides the output power voltage VPout as the guide power voltage +CP_VP when the supply target signal SupplyTarget is at a first level (for example, a low voltage level) to detect whether the charging gun Gev is connected with the electric vehicle CARev; after judging that the charging gun Gev is connected with the electric vehicle CARev, the supply target signal SupplyTarget can be at a second level (for example, a high voltage level), so that the output switching circuit 170 provides the output power voltage VPout as the positive power supply device power voltage +VP2. And the auxiliary discharging circuit 180a is used to convert the positive power supply device power voltage +VP2 into the negative power supply device power voltage -VP2.

[0059] Figure 5 is a circuit schematic diagram of the control circuit according to an embodiment of the present application. Please refer to Figure 1 and Figure 5 In the present embodiment, the control circuit 120, for example, takes the control circuit 120a as an example, and the control circuit 120a, for example, includes a microcontroller 121, resistors R81-R89, R8a, R8b, and capacitors C81-C84.

[0060] The microcontroller 121 has a component power supply end VDD that receives a circuit power supply voltage VPcc, an input / output end RA5 (corresponding to a third input / output end) that provides a bootstrap current limit signal Boost ILMT, an input / output end RA4 (corresponding to a second input / output end) that provides a dummy load signal Dummy, an input / output end MCLR / VPP / RA3 (corresponding to a first input / output end) that receives an external reset signal MCLR, an input / output end RC5 (corresponding to a thirteenth input / output end), an input / output end RC4 (corresponding to a twelfth input / output end), an input / output end RC3 (corresponding to an eleventh input / output end), an input / output end RC6 (corresponding to a fourteenth input / output end), an input / output end RC7 (corresponding to a fifteenth input / output end), an input / output end RB7 (corresponding to a seventh input / output end) that provides a charge control signal Charge, a chip ground end VSS that receives a ground voltage SGND, an input / output end RA0 / ICSPDAT, an input / output end RA1 / ICSPCLK, an input / output end RA2, an input / output end RC0 (corresponding to an eighth input / output end), an input / output end RC1 (corresponding to a ninth input / output end) that receives a blackout indication signal Blackout, an input / output end RC2 (corresponding to a tenth input / output end) that provides a discharge control signal Discharge, an input / output end RB4 (corresponding to a fourth input / output end) that couples an inter-integrated circuit signal serial data signal I2C1DAT, an input / output end RB5 (corresponding to a fifth input / output end) that provides a supply target signal SupplyTarget, and an input / output end RB6 (corresponding to a sixth input / output end) that couples an inter-integrated circuit signal serial frequency signal I2C1CLK.

[0061] A resistor R81 (corresponding to a twenty-eighth resistor) is coupled between a universal asynchronous receiver / transmitter signal transmit signal UART_TX and the input / output end RC5. A resistor R82 (corresponding to a twenty-ninth resistor) is coupled between a battery voltage signal BAT_Voltage and the input / output end RC4. A capacitor C81 (corresponding to a twentieth capacitor) is coupled between the input / output end RC4 and the ground voltage SGND. A resistor R83 (corresponding to a thirtieth resistor) is coupled between a universal asynchronous receiver / transmitter signal receive signal UART_RX and the input / output end RC3.

[0062] Resistor R84 (corresponding to the thirty-first resistor) is coupled between the pilot signal CP_ADC, which transmits control pilot information, and input / output terminal RC6. Capacitor C82 (corresponding to the twenty-first capacitor) is coupled between input / output terminal RC6 and ground voltage SGND. Resistor R85 (corresponding to the thirty-second resistor) is coupled between the internal regulated power supply voltage REG_VP (e.g., +2.5 volts) and input / output terminal RC7. Resistor R86 (corresponding to the thirty-third resistor) is coupled between input / output terminal RC7 and ground voltage SGND. Capacitor C83 (corresponding to the twenty-second capacitor) is coupled between input / output terminal RC7 and ground voltage SGND.

[0063] Resistor R87 is coupled between the input / output terminal RA0 / ICSPDAT and the in-system sequence programming data signal ICSPDAT. Resistor R88 is coupled between the input / output terminal RA1 / ICSPCLK and the in-system sequence programming frequency signal ICSPCLK. Resistor R89 ​​(corresponding to the thirty-fourth resistor) is coupled between the input / output terminal RC0 and the battery temperature signal BAT_TEMP. Capacitor C84 (corresponding to the twenty-third capacitor) is coupled between the input / output terminal RC0 and the ground voltage SGND. Resistor R8a (corresponding to the thirty-fifth resistor) is coupled between the input / output terminal RC2 and the ground voltage SGND. Resistor R8b (corresponding to the thirty-sixth resistor) is coupled between the input / output terminal RB5 and the ground voltage SGND.

[0064] Here, the control circuit 120a receives battery-related information from the monitoring circuit 190, communicates with the safety protection circuit 110 using a universal asynchronous transceiver (UART) signal, provides software updates, initiates signal channels with other circuits in the battery backup system / solution (BPS), and provides behavioral signals to the charging circuit 130, the discharging circuit 160, and other electrical circuits.

[0065] Figure 6 This is a circuit diagram of the monitoring circuit according to an embodiment of the present invention. Please refer to... Figure 1 and Figure 6 In this embodiment, the monitoring circuit 190 is exemplified by monitoring circuit 190a, and monitoring circuit 190a includes, for example, a measurement chip 191, resistors R91 to R99, R9a, and capacitors C91 to C94.

[0066] The measurement chip 191 has a component external connection terminal P1, an empty connection voltage enable terminal VEN, a component external connection terminal P2, a battery connection terminal BAT, a chip enable terminal CE receiving a power supply voltage VPcc of a receiving circuit, an internal regulated input terminal REGIN receiving the power supply voltage VPcc of the receiving circuit, an internal regulated output terminal REG25 providing an internal regulated power supply voltage REG_VP, a serial data terminal P3 / SDA coupled with a serial data signal I2C1DAT, a serial frequency terminal P4 / SCL coupled with a serial frequency signal I2C1CLK, an empty connection serial communication word P5 / HDQ, a temperature detection terminal P6 / TS, a negative analog input terminal SRN, a positive analog input terminal SRP, and a chip ground terminal VSS.

[0067] The resistance R91 is coupled between the measurement ground voltage Gauge_GND and the component external connection terminal P1. The resistance R92 is coupled between the measurement ground voltage Gauge_GND and the component external connection terminal P2. The resistance R93 (corresponding to the thirty-seventh resistance) is coupled between the positive battery terminal +VBAT and the battery connection terminal BAT. The capacitor C91 (corresponding to the twenty-fourth capacitor) is coupled between the internal regulated input terminal REGIN and the measurement ground voltage Gauge_GND. The capacitor C2 (corresponding to the twenty-fifth capacitor) is coupled between the internal regulated output terminal REG25 and the measurement ground voltage Gauge_GND.

[0068] The resistance R94 (corresponding to the thirty-eighth resistance) is coupled between the circuit power supply voltage VPcc and the serial data terminal P3 / SDA. The resistance R95 (corresponding to the thirty-ninth resistance) is coupled between the circuit power supply voltage VPcc and the serial frequency terminal P4 / SCL. The resistance R96 (corresponding to the fortieth resistance) is coupled between the temperature detection terminal P6 / TS and the battery temperature signal BAT_TEMP. The capacitor C93 (corresponding to the twenty-sixth capacitor) is coupled between the negative analog input terminal SRN and the positive analog input terminal SRP. The capacitor C94 (corresponding to the twenty-seventh capacitor C94) is coupled between the negative analog input terminal SRN and the ground voltage SGND.

[0069] The capacitor C95 (corresponding to the twenty-eighth capacitor) is coupled between the positive analog input terminal SRP and the ground voltage SGND. The resistor R97 (corresponding to the forty-first resistor) is coupled between the negative analog input terminal SRN and the ground voltage SGND. The resistor R98 (corresponding to the forty-second resistor) is coupled between the ground voltage SGND and the negative battery end -VBAT. The resistor R99 (corresponding to the forty-third resistor) is coupled between the positive analog input terminal SRP and the negative battery end -VBAT. The resistor R9a (corresponding to the forty-fourth resistor) is coupled between the chip ground terminal VSS and the negative battery end -VBAT. Through the integrated circuit (I2C) signal, the monitoring circuit 190a communicates with the control circuit 120a, and returns the recorded battery voltage BAT_VP, the charging and discharging current and the calculated power and health state information to the control circuit 120a.

[0070] In the above embodiment, the single resistor / resistor can be replaced by a plurality of series / parallel resistors / resistors, which depends on the circuit design, and the embodiment of the utility model is not limited thereto.

[0071] Figure 7 is a flowchart of a battery backup method of an electric vehicle power supply device according to an embodiment of the utility model. Please refer to Figure 7 In the embodiment, the battery backup method of the electric vehicle power supply device includes the following processes. In step S110, the safety protection circuit of the electric vehicle power supply device provides a power failure indication signal based on the positive charging gun power supply voltage and the negative charging gun power supply voltage. In step S120, the control circuit of the electric vehicle power supply device provides a discharging control signal based on the power failure indication signal and the control guide information.

[0072] In step S130, the discharging circuit of the electric vehicle power supply device coupled with the battery converts the battery voltage of the battery into an output power supply voltage based on the discharging control signal. In step S140, the output switching circuit of the electric vehicle power supply device provides the output power supply voltage as a guide power supply voltage or a positive power supply device power supply voltage based on the supply target signal from the control circuit. In step S150, the control guide circuit of the electric vehicle power supply device judges whether the charging gun is connected with the electric vehicle based on the guide power supply voltage to provide the control guide information. In step S160, the auxiliary discharging circuit of the electric vehicle power supply device provides a negative power supply device power supply voltage based on the positive power supply device power supply voltage, wherein the positive charging gun power supply voltage and the negative charging gun power supply voltage are received from the power conversion circuit or the connected electric vehicle. The order of steps S110, S120, S130, S140, S150 and S160 is used for illustration, and the embodiment of the utility model is not limited thereto. Moreover, the details of steps S110, S120, S130, S140, S150 and S160 can be referred to Figures 1 to 6 shown, which will not be described here again.

[0073] In summary, the electric vehicle power supply equipment and the power backup device of the embodiment of the utility model, when the safety protection circuit reacts that the positive charging gun power voltage and the negative charging gun power voltage are not received through the power failure indication signal and the control guide circuit reacts that the charging gun is connected with the electric vehicle through the control guide information, the battery voltage is converted into the positive power supply equipment power voltage and the negative power supply equipment power voltage, and the communication circuit of the electric vehicle power supply equipment is powered, so as to maintain the communication function of the electric vehicle power supply equipment.

[0074] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, but not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. An electric vehicle power supply apparatus characterized by comprising: The electric vehicle supply equipment comprises: a battery having a positive battery terminal and a negative battery terminal; a safety protection circuit receiving a positive charging gun supply voltage and a negative charging gun supply voltage, and providing a power-off indication signal based on the positive charging gun supply voltage and the negative charging gun supply voltage; a control circuit coupled to the safety protection circuit, receiving the power-off indication signal and a control guide information, and providing a discharging control signal based on the power-off indication signal and the control guide information; a discharging circuit coupled to the control circuit, the positive battery terminal and the negative battery terminal, receiving the discharging control signal, and converting a battery voltage of the battery into an output supply voltage based on the discharging control signal; an output switching circuit coupled to the control circuit and the discharging circuit, receiving a supply target signal from the control circuit, and receiving the output supply voltage from the discharging circuit, wherein the output switching circuit provides the output supply voltage as a guide supply voltage or a positive supply equipment supply voltage based on the supply target signal; a control guide circuit coupled to the control circuit and the output switching circuit, receiving the guide supply voltage, and providing the control guide information to the control circuit based on the guide supply voltage to determine whether a charging gun is connected to an electric vehicle; and an auxiliary discharging circuit coupled to the output switching circuit, receiving the positive supply equipment supply voltage, and providing a negative supply equipment supply voltage, wherein the positive charging gun supply voltage and the negative charging gun supply voltage are received from a power conversion circuit or the connected electric vehicle. The output switching circuit provides the output supply voltage as the guide supply voltage by default based on the supply target signal.

2. The electric vehicle supply device of claim 1, wherein The control circuit provides a charging control signal based on the power-off indication signal, and 3. The electric vehicle supply device of claim 1, wherein wherein the electric vehicle supply equipment further comprises a charging circuit coupled to the positive battery terminal and the negative battery terminal, coupled to the control circuit to receive the charging control signal, and receiving the positive charging gun supply voltage, wherein the charging circuit charges the battery using the positive charging gun supply voltage based on the charging control signal. The control circuit provides the discharging control signal when the power-off indication signal indicates that the safety protection circuit does not receive the positive charging gun supply voltage and the negative charging gun supply voltage, and the control guide information indicates that the charging gun is connected to the electric vehicle, and 4. The electric vehicle supply device of claim 3, wherein The control circuit provides the charging control signal when the power-off indication signal indicates that the safety protection circuit receives the positive charging gun supply voltage and the negative charging gun supply voltage. The charging circuit comprises:

5. The electric vehicle supply device of claim 3, wherein a step-down conversion circuit receiving the positive charging gun supply voltage, the charging control signal and a feedback voltage to provide a step-down supply voltage; a filter circuit coupled to the step-down conversion circuit to receive the step-down supply voltage, and providing a charging supply voltage; a feedback circuit coupled to the negative battery terminal and the step-down conversion circuit to provide the feedback voltage; ​ An overvoltage protection circuit coupled between the filter circuit and the positive battery terminal to turn on and off the charging power voltage to the positive battery terminal based on the charging power voltage; A virtual load circuit coupled to the positive battery terminal and receiving a virtual load signal from the control circuit to discharge the battery in response to the virtual load signal.

6. The electric vehicle supply device of claim 5, wherein The buck conversion circuit includes: a buck circuit chip having a first power voltage input terminal receiving the positive charging gun power voltage, a first enable input terminal receiving the charging control signal, a first bootstrap terminal, a first switch node terminal providing the buck power voltage, and a buck feedback terminal receiving the feedback voltage; a first resistor coupled between a system power voltage and the first power voltage input terminal; a first capacitor coupled between the first power voltage input terminal and a ground voltage; a second resistor coupled between the first enable input terminal and the ground voltage; and a second capacitor coupled between the first bootstrap terminal and the first switch node terminal.

7. The electric vehicle supply device of claim 5, wherein The filter circuit includes: a first inductor and a second inductor connected in series between the buck power voltage and the charging power voltage; and a third capacitor coupled between a connection point between the first inductor and the second inductor and a ground voltage.

8. The electric vehicle supply device of claim 5, wherein, The feedback circuit includes: a differential amplifier chip having an output terminal, a positive input terminal, and a negative input terminal; a third resistor coupled between the feedback voltage and the output terminal; a fourth capacitor coupled between the output terminal and a ground voltage; a fourth resistor coupled between the output terminal and the negative input terminal; a fifth capacitor coupled between the output terminal and the negative input terminal; a fifth resistor coupled between the positive input terminal and the ground voltage; a sixth resistor coupled between the positive input terminal and the negative battery terminal; a seventh resistor coupled between the negative battery terminal and the ground voltage; and an eighth resistor coupled between the negative input terminal and the ground voltage.

9. The electric vehicle supply device of claim 5, wherein The overvoltage protection circuit includes: a Zener shunt regulator having an anode coupled to a ground voltage, a cathode, and a reference terminal; a ninth resistor coupled between the charging power voltage and the reference terminal of the Zener shunt regulator; a tenth resistor coupled between the reference terminal of the Zener shunt regulator and the ground voltage; an eleventh resistor coupled between the charging power voltage and the cathode of the Zener shunt regulator; a first transistor having a first terminal receiving the charging power voltage, a control terminal coupled to the cathode of the Zener shunt regulator, and a second terminal; a second transistor having a first terminal receiving the charging power voltage, a control terminal coupled to the second terminal of the first transistor, and a second terminal; a twelfth resistor coupled between the second terminal of the first transistor and the ground voltage; and a first diode having an anode coupled to the second terminal of the first transistor, and a cathode coupled to the positive battery terminal.

10. The electric vehicle supply device of claim 5, wherein, The virtual load circuit includes: a second diode having an anode coupled to the positive battery terminal, and a cathode receiving a circuit power voltage. a third transistor having a first terminal, a control terminal receiving the dummy load signal, and a second terminal receiving a ground voltage; a thirteenth resistor coupled between the positive battery terminal and the first terminal of the third transistor; a fourteenth resistor coupled between the ground voltage and the control terminal of the third transistor; and a sixth capacitor coupled between the circuit supply voltage and the ground voltage.

11. The electric vehicle supply device of claim 1, wherein, The discharge circuit includes: a boost circuit chip having a second supply voltage input terminal coupled to the positive battery terminal, a second enable input terminal receiving the discharge control signal, a second bootstrap terminal, a second switch node terminal, a voltage output terminal providing the output supply voltage, a first voltage comparison terminal, a current limit terminal receiving a bootstrap current limit signal, and a boost feedback terminal; a seventh capacitor coupled between the positive battery terminal and a ground voltage; an eighth capacitor coupled between the positive battery terminal and the ground voltage; a ninth capacitor coupled between the second bootstrap terminal and the second switch node terminal; a third inductor coupled between the positive battery terminal and the second switch node terminal; a fifteenth resistor and a sixteenth resistor coupled in series between the output supply voltage and the ground voltage; a seventeenth resistor coupled between the boost feedback terminal and a connection point between the fifteenth resistor and the sixteenth resistor; and a tenth capacitor and an eighteenth resistor coupled in series between the first voltage comparison terminal and the ground voltage.

12. The electric vehicle supply device of claim 1, wherein, The output switching circuit includes: an eleventh capacitor coupled between the output supply voltage and a ground voltage; a twelfth capacitor coupled between the output supply voltage and the ground voltage; a fourth transistor having a first terminal receiving the output supply voltage, a control terminal, and a second terminal; a nineteenth resistor coupled between the first terminal of the fourth transistor and the control terminal of the fourth transistor; a thirteenth capacitor coupled between the second terminal of the fourth transistor and the control terminal of the fourth transistor; a third diode having an anode coupled to the second terminal of the fourth transistor, and a cathode providing the positive supply device supply voltage; a fifth transistor having a first terminal, a control terminal, and a second terminal coupled to the ground voltage; a twentieth resistor coupled between the control terminal of the fourth transistor and the first terminal of the fifth transistor; a twenty-first resistor coupled between the supply target signal and the control terminal of the fifth transistor; a fourteenth capacitor coupled between the control terminal of the fifth transistor and the second terminal of the fifth transistor; a sixth transistor having a first terminal, a control terminal, and a second terminal coupled to the ground voltage; a twenty-second resistor coupled between the supply target signal and the control terminal of the sixth transistor; a twenty-third resistor coupled between the output supply voltage and the first terminal of the sixth transistor; a fifteenth capacitor coupled between the control terminal of the sixth transistor and the second terminal of the sixth transistor; a seventh transistor having a first terminal receiving the output power voltage, a control terminal, and a second terminal providing the pilot power voltage; a twenty-fourth resistor coupled between the first terminal of the seventh transistor and the control terminal of the seventh transistor; a sixteenth capacitor coupled between the second terminal of the seventh transistor and the ground voltage; and an eighth transistor having a first terminal coupled to the control terminal of the seventh transistor, a control terminal coupled to the first terminal of the sixth transistor, and a second terminal coupled to the ground voltage.

13. The electric vehicle supply device of claim 12, wherein, The auxiliary discharge circuit includes: a buck-boost circuit chip having a current limit detection input terminal, an internal voltage stabilization output terminal coupled to the anode of the third diode, a second voltage comparison terminal, an internal switch collector terminal coupled to the current limit detection input terminal, an internal switch emitter terminal, and a timing capacitor terminal; a seventeenth capacitor coupled between the anode of the third diode and the ground voltage; a twenty-fifth resistor coupled between the anode of the third diode and the current limit detection input terminal; a twenty-sixth resistor coupled between the second voltage comparison terminal and the ground voltage; a twenty-seventh resistor coupled between the second voltage comparison terminal and the negative powered device power voltage; an eighteenth capacitor coupled between the timing capacitor terminal and the negative powered device power voltage; a fourth inductor coupled between the internal switch emitter terminal and the ground voltage; a fourth diode having an anode coupled to the negative powered device power voltage and a cathode coupled to the internal switch emitter terminal; and a nineteenth capacitor coupled between the negative powered device power voltage and the ground voltage.

14. The electric vehicle supply device of claim 1, wherein, Further including a monitoring circuit coupled to the battery and the control circuit to monitor battery voltage, charge and discharge current, battery temperature, battery power level, and battery state of health information, and to transmit the battery state of health information to the safety protection circuit via the control circuit to send a battery warning signal via the safety protection circuit when the battery state of health information indicates a low state of health of the battery.

15. The electric vehicle supply device of claim 14, wherein, The monitoring circuit transmits the battery state of health information to the control circuit via a first serial communication signal, and the control circuit transmits the battery state of health information to the safety protection circuit via a second serial communication signal.

16. The electric vehicle supply device of claim 15, wherein, The first serial communication signal comprises an Inter-Integrated Circuit (I2C) signal, and the second serial communication signal comprises a Universal Asynchronous Receiver Transmitter (UART) signal.

17. The electric vehicle supply device of claim 16, wherein The control circuit includes: a microcontroller having a first input / output terminal to receive an external reset signal, a second input / output terminal to provide a virtual load signal, a third input / output terminal to provide a bootstrap current limit signal, a fourth input / output terminal to couple a serial data signal of the inter-integrated circuit signal, a fifth input / output terminal to provide the supply target signal, a sixth input / output terminal to couple a serial clock signal of the inter-integrated circuit signal, a seventh input / output terminal to provide a charge control signal, an eighth input / output terminal, a ninth input / output terminal to receive the power fail signal, a tenth input / output terminal to provide the discharge control signal, an eleventh input / output terminal, a twelfth input / output terminal, a thirteenth input / output terminal, a fourteenth input / output terminal, and a fifteenth input / output terminal; a twenty-eighth resistor coupled between a transmit signal of the universal asynchronous receiver / transmitter signal and the thirteenth input / output terminal; a twenty-ninth resistor coupled between a battery voltage signal and the twelfth input / output terminal; a twentieth capacitor coupled between the twelfth input / output terminal and a ground voltage; a thirtieth resistor coupled between a receive signal of the universal asynchronous receiver / transmitter signal and the eleventh input / output terminal; a thirty-first resistor coupled between a guide signal transmitting the control guide information and the fourteenth input / output terminal; a twenty-first capacitor coupled between the fourteenth input / output terminal and the ground voltage; a thirty-second resistor coupled between an internal regulated power supply voltage and the fifteenth input / output terminal; a thirty-third resistor coupled between the fifteenth input / output terminal and the ground voltage; a twenty-second capacitor coupled between the fifteenth input / output terminal and the ground voltage; a thirty-fourth resistor coupled between the eighth input / output terminal and a battery temperature signal; a twenty-third capacitor coupled between the eighth input / output terminal and the ground voltage; a thirty-fifth resistor coupled between the tenth input / output terminal and the ground voltage; and a thirty-sixth resistor coupled between the fifth input / output terminal and the ground voltage.

18. The electric vehicle supply device of claim 17, wherein, The monitoring circuit includes: a measurement chip having a battery connection terminal, a chip enable terminal to receive a circuit power supply voltage, an internal regulated input terminal to receive the circuit power supply voltage, an internal regulated output terminal to provide an internal regulated power supply voltage, a serial data terminal to couple the serial data signal, a serial clock terminal to couple the serial clock signal, a temperature detection terminal, a negative analog input terminal, a positive analog input terminal, a chip ground terminal; a thirty-seventh resistor coupled between the positive battery terminal and the battery connection terminal; a twenty-fourth capacitor coupled between the internal regulated input terminal and a measurement ground voltage; a twenty-fifth capacitor coupled between the internal regulated output terminal and the measurement ground voltage; a thirty-eighth resistor coupled between the circuit power supply voltage and the serial data terminal; a thirty-ninth resistor coupled between the circuit power supply voltage and the serial clock terminal; a fortieth resistor coupled between the temperature detection terminal and a battery temperature signal; a twenty-sixth capacitor coupled between the negative analog input terminal and the positive analog input terminal; a twenty-seventh capacitor coupled between the negative analog input terminal and a ground voltage; a twenty-eighth capacitor coupled between the positive analog input terminal and the ground voltage; a forty-first resistor coupled between the negative analog input terminal and the ground voltage; a forty-second resistor coupled between the ground voltage and the negative battery terminal; a forty-third resistor coupled between the positive analog input terminal and the negative battery terminal; and a forty-fourth resistor coupled between the chip ground terminal and the negative battery terminal.

19. An electrical backup device, comprising: comprising: a battery module; a power conversion circuit electrically connected to the battery module; an output circuit electrically connected to the power conversion circuit; and a control circuit electrically connected to the battery module, the power conversion circuit and the output circuit, wherein the control circuit receives a status indication signal from outside to control the battery module to discharge or control the power conversion circuit to charge the battery module. the power conversion circuit has a first power converter and a second power converter, the first power converter and the second power converter are electrically connected to the battery module and the control circuit respectively, when the status indication signal represents a first state, the first power converter receives a first power and charges the battery module, when the status indication signal represents a second state, the battery module discharges the second power converter.

20. The power backup device of claim 19, wherein, the output circuit has a selection circuit, a first output path and a second output path, the selection circuit is electrically connected to the power conversion circuit, when the status indication signal represents a second state, the selection circuit is electrically connected to the first output path, and judges whether the output circuit is electrically connected to a load.

21. The power backup device of claim 19, wherein, when the output circuit is electrically connected to the load, the selection circuit is electrically connected to the second output path and provides power to the load.

22. The power backup device of claim 21, wherein, ​

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