CN117674335B - Power supply circuit, power supply control method, storage medium and vehicle - Google Patents

Abstract

The present disclosure proposes a power supply circuit, a power supply control method, a vehicle, and a storage medium, the power supply circuit including: the full-bridge circuit comprises a first bridge arm and a second bridge arm, and the first bridge arm and the second bridge arm are connected in parallel and then connected between the positive electrode of the first battery pack and the negative electrode of the second battery pack in a bridging manner; one end of the first inductor is connected with the middle point of the first bridge arm, and the other end of the first inductor is respectively connected with the negative electrode of the first battery pack and the positive electrode of the second battery pack; one end of the second inductor is connected with the middle point of the second bridge arm, and the other end of the second inductor is respectively connected with the negative electrode of the first battery pack and the positive electrode of the second battery pack; and the controller is connected with the full-bridge circuit and is used for controlling the full-bridge circuit so as to discharge the first battery pack and/or the second battery pack. The circuit performs phase-shifting control on the double bridge arms of the full-bridge circuit through the controller, so that the control difficulty can be reduced, the power supply reliability can be improved, and the current ripple can be reduced.

Description

Power supply circuit, power supply control method, storage medium and vehicle

Technical Field

The present disclosure relates to the technical field of vehicle power supply, and in particular to a power supply circuit, a power supply control method, a computer-readable storage medium and a vehicle.

Background Art

In the electric vehicle power supply system, a dual battery pack or even multiple battery packs are used for power supply. Generally, a switch and its anti-parallel diode form a bridge arm, and the bridge arm and the inductor are connected in series to form a power supply circuit. Because the inductor needs to continue current, the second branch needs to be opened quickly when the first branch is disconnected, which has extremely high requirements for switch operation and is difficult to control.

In addition, the fluctuation of the inductor current during the switching cycle will cause the battery to charge and discharge frequently, thereby accelerating battery aging. Moreover, if one of the two switches is damaged, the power supply system will not work properly and the power supply reliability will be poor.

Summary of the invention

The present disclosure aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the first purpose of the present disclosure is to propose a power supply circuit, which can reduce the control difficulty by staggered-phase control of the dual bridge arms of the full-bridge circuit through a control module, enable the second battery pack to continuously and stably supply power, improve power supply reliability, reduce current ripple, and avoid shortening the battery life due to frequent charging of the battery.

A second objective of the present disclosure is to provide a power supply control method.

A third object of the present disclosure is to provide a computer-readable storage medium.

A fourth object of the present disclosure is to provide a vehicle.

To achieve the above-mentioned purpose, an embodiment of the first aspect of the present disclosure proposes a power supply circuit, including: a full-bridge circuit, the full-bridge circuit including a first bridge arm and a second bridge arm, the first bridge arm and the second bridge arm are connected in parallel and connected between the positive electrode of the first battery pack and the negative electrode of the second battery pack; a first inductor, one end of the first inductor is connected to the midpoint of the first bridge arm, and the other end of the first inductor is respectively connected to the negative electrode of the first battery pack and the positive electrode of the second battery pack; a second inductor, one end of the second inductor is connected to the midpoint of the second bridge arm, and the other end of the second inductor is respectively connected to the negative electrode of the first battery pack and the positive electrode of the second battery pack; a controller, the controller is connected to the full-bridge circuit, and the controller is used to control the full-bridge circuit to discharge the first battery pack and/or the second battery pack.

According to the power supply circuit of the embodiment of the present disclosure, the first battery pack and the second battery pack are connected in series to supply power to the load, and the controller performs staggered phase control on the dual bridge arms of the full-bridge circuit, so that the first inductor and the second inductor can store energy respectively to boost the voltage of the second battery pack, so that the second battery pack can stably supply power to the load. Therefore, the circuit performs staggered phase control on the dual bridge arms of the full-bridge circuit by the controller, which can reduce the control difficulty, enable the second battery pack to continuously and stably supply power, improve power supply reliability, reduce current ripple, and avoid shortening the battery life due to frequent battery charging.

In addition, the power supply circuit according to the above embodiment of the present disclosure may also have the following additional technical features:

According to one embodiment of the present disclosure, the controller is specifically used to: control the full-bridge circuit to be in a stop working state so that the first battery pack and the second battery pack are powered in series; or control the full-bridge circuit to be in a working state so that the first battery pack and/or the second battery pack are powered.

According to one embodiment of the present disclosure, the power supply circuit also includes: a current sampling circuit, which is used to obtain the current of the first battery pack and/or the current of the second battery pack, the current of the first inductor and the second inductor; and a controller, which controls the full-bridge circuit based on the obtained current to supply power to the first battery pack and/or the second battery pack.

According to one embodiment of the present disclosure, the controller includes: a first signal generating unit, used to generate complementary first control signals and second control signals according to a first current difference between a preset reference current and the current of the first battery pack and/or the current of the second battery pack; a second signal generating unit, used to generate complementary third control signals and fourth control signals according to a second current difference between the current of the first inductor and the current of the second inductor; and a control unit, the control unit being used to control the full-bridge circuit according to the first control signal, the second control signal, the third control signal and the fourth control signal.

According to one embodiment of the present disclosure, the first signal generating unit includes: a first subtractor, a first regulator, a first signal generator and a first inverter, the first subtractor is used to obtain a first current difference between a preset reference current and the current of the first battery pack or the current of the second battery pack; the first regulator is used to perform proportional-integral regulation on the first current difference to obtain a first given value; the first signal generator is used to generate a first control signal according to the first given value and the first preset signal; the first inverter is used to invert the first control signal to obtain a second control signal; the second signal generating unit includes: a second subtractor, a second regulator, a second signal generator and a second inverter, the second subtractor is used to obtain a second current difference between the current of the first inductor and the current of the second inductor; the second regulator is used to perform proportional-integral regulation on the second current difference to obtain a second given value; the second signal generator is used to generate a third control signal according to the second given value and the second preset signal; the second inverter is used to invert the third control signal to obtain a fourth control signal; wherein the first preset signal and the second preset signal are out of phase by half a cycle.

According to an embodiment of the present disclosure, when the first battery pack is discharged, the current sampling circuit acquires the current of the second battery pack; when the second battery pack is discharged, the current sampling circuit acquires the current of the first battery pack.

According to one embodiment of the present disclosure, the first bridge arm includes a first upper bridge switch tube and a first lower bridge switch tube, one end of the first upper bridge switch tube is connected to the positive electrode of the first battery pack, the other end of the first upper bridge switch tube is connected to one end of the first lower bridge switch tube and a first connection point is formed, the other end of the first lower bridge switch tube is connected to the negative electrode of the second battery pack, and the first connection point is connected to one end of the first inductor; the second bridge arm includes a second upper bridge switch tube and a second lower bridge switch tube, one end of the second upper bridge switch tube is connected to the positive electrode of the first battery pack, the other end of the second upper bridge switch tube is connected to one end of the second lower bridge switch tube and a second connection point is formed, the other end of the second lower bridge switch tube is connected to the negative electrode of the second battery pack, and the second connection point is connected to one end of the second inductor.

According to an embodiment of the present disclosure, the first upper bridge switch tube, the first lower bridge switch tube, the second upper bridge switch tube and the second lower bridge switch tube are all provided with anti-parallel diodes.

According to one embodiment of the present disclosure, a control unit: controls the first upper bridge switch tube of the first bridge arm according to a first control signal, and controls the first lower bridge switch tube of the first bridge arm according to a second control signal; controls the second upper bridge switch tube of the second bridge arm according to a third control signal, and controls the second lower bridge switch tube of the second bridge arm according to a fourth control signal.

According to one embodiment of the present disclosure, the control unit: when the first bridge arm fails, controls the second upper bridge switch tube of the second bridge arm according to the first control signal, and controls the second lower bridge switch tube of the second bridge arm according to the second control signal.

According to one embodiment of the present disclosure, the power supply circuit further includes: a filter inductor and a filter capacitor, the filter inductor is connected in series between the positive electrode of the first battery pack and the full-bridge circuit, and the filter capacitor is connected in parallel with the first battery pack.

According to one embodiment of the present disclosure, the power supply circuit further includes: a bus capacitor, which is connected in parallel with the first bridge arm and the second bridge arm.

According to one embodiment of the present disclosure, the first battery pack is a power type battery pack, and the second battery pack is an energy type battery pack; or, the first battery pack is an energy type battery pack, and the second battery pack is a power type battery pack.

To achieve the above-mentioned purpose, the second aspect embodiment of the present disclosure proposes a power supply control method, which is applied to the above-mentioned power supply circuit, and the method includes: obtaining the current of the first battery pack and/or the second battery pack, the current of the first inductor and the second inductor; controlling the full-bridge circuit based on the obtained current to enable the first battery pack and/or the second battery pack to supply power.

According to the power supply control method of the embodiment of the present disclosure, the current of the first battery pack and/or the second battery pack, the current of the first inductor and the second inductor are obtained, and a control signal is generated based on the obtained current to perform phase-shifting control on the full-bridge circuit. Thus, the method can perform phase-shifting control on the dual bridge arms of the full-bridge circuit, which can reduce the control difficulty, so that the second battery pack can continuously and stably supply power, improve the power supply reliability, reduce the current ripple, and avoid shortening the battery life due to frequent charging of the battery.

In addition, the power supply control method according to the above embodiment of the present disclosure may also have the following additional technical features:

According to one embodiment of the present disclosure, the full-bridge circuit is controlled based on the acquired current to supply power to the first battery pack and/or the second battery pack, including: acquiring a first current difference between a preset reference current and the current of the first battery pack or the current of the second battery pack, and generating complementary first control signals and second control signals according to the first current difference; acquiring a second current difference between the current of the first inductor and the current of the second inductor, and generating complementary third control signals and fourth control signals according to the second current difference; and controlling the full-bridge circuit according to the first control signal, the second control signal, the third control signal and the fourth control signal.

According to one embodiment of the present disclosure, a complementary first control signal and a second control signal are generated according to a first current difference, including: performing proportional-integral adjustment on the first current difference to obtain a first given value, generating a first control signal according to the first given value and a first preset signal, and inverting the first control signal to obtain a second control signal; performing proportional-integral adjustment on the second current difference to obtain a second given value, generating a third control signal according to the second given value and the second preset signal, and inverting the third control signal to obtain a fourth control signal, wherein the first preset signal and the second preset signal are out of phase by half a cycle.

According to an embodiment of the present disclosure, a full-bridge circuit is controlled according to a first control signal, a second control signal, a third control signal and a fourth control signal, including: controlling the first upper bridge switch tube of the first bridge arm according to the first control signal, and controlling the first lower bridge switch tube of the first bridge arm according to the second control signal; when the first bridge arm is normal, controlling the second upper bridge switch tube of the second bridge arm according to the third control signal, and controlling the second lower bridge switch tube of the second bridge arm according to the fourth control signal; when the first bridge arm fails, controlling the second upper bridge switch tube of the second bridge arm according to the first control signal, and controlling the second lower bridge switch tube of the second bridge arm according to the second control signal.

To achieve the above objectives, a third aspect of the present disclosure provides a computer-readable storage medium on which a power supply control program is stored. When the power supply control program is executed by a processor, the above power supply control method is implemented.

According to the computer-readable storage medium of the embodiment of the present disclosure, by executing the above-mentioned power supply control method, the dual bridge arms of the full-bridge circuit can be staggered-phase controlled, which can reduce the control difficulty, enable the second battery pack to continuously and stably supply power, improve power supply reliability, reduce current ripple, and avoid shortening the battery life due to frequent charging of the battery.

To achieve the above-mentioned purpose, a fourth aspect of the present disclosure provides a vehicle, comprising: the above-mentioned power supply circuit, which is used to supply power to the vehicle.

According to the vehicle of the embodiment of the present disclosure, the second battery pack can continuously and stably supply power through the above-mentioned power supply circuit, thereby improving power supply reliability and reducing current ripple, thereby avoiding shortening of battery life due to frequent charging of the battery.

Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description or learned through practice of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a circuit topology diagram of a power supply circuit according to an embodiment of the present disclosure;

FIG2 is a circuit topology diagram of a power supply circuit according to an embodiment of the present disclosure;

FIG3 is a block diagram of a controller according to an embodiment of the present disclosure;

FIG4 is a schematic diagram of a control signal generation process according to an embodiment of the present disclosure;

FIG5 is a circuit topology diagram of a power supply circuit according to an embodiment of the present disclosure;

FIG6 is a flow chart of a power supply control method according to an embodiment of the present disclosure;

FIG. 7 is a block diagram of a vehicle according to an embodiment of the present disclosure.

Reference numerals:

Power supply circuit 100,

The first battery pack 110, the second battery pack 120, the current sampling circuit 140,

Full bridge circuit 131, first inductor L1, second inductor L2, controller 132, filter inductor L3, filter capacitor C1, bus capacitor C2

The first bridge arm 1311, the second bridge arm 1312, the first upper bridge switch tube M1, the first lower bridge switch tube M2, the first connection point J1, the second upper bridge switch tube M3, the second lower bridge switch tube M4, the second connection point J2, the first signal generating unit 1321, the second signal generating unit 1322, the control unit 1323,

A first subtractor A1, a first regulator B1, a first signal generator P1, a first inverter N1, a second subtractor A2, a second regulator B2, a second signal generator P2, and a second inverter N2

DETAILED DESCRIPTION

Embodiments of the present disclosure are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present disclosure, and should not be construed as limiting the present disclosure.

The power supply circuit, power supply control method, computer-readable storage medium and vehicle proposed in the embodiments of the present disclosure are described below with reference to the accompanying drawings.

FIG. 1 is a circuit topology diagram of a power supply circuit according to an embodiment of the present disclosure.

As shown in FIG. 1 , the power supply circuit 100 according to the embodiment of the present disclosure may include: a full-bridge circuit 131 , a first inductor L1 , a second inductor L2 , and a controller 132 .

The full-bridge circuit 131 includes a first bridge arm 1311 and a second bridge arm 1312. The first bridge arm 1311 and the second bridge arm 1312 are connected in parallel and are connected between the positive electrode of the first battery pack 110 and the negative electrode of the second battery pack 120. One end of the first inductor L1 is connected to the midpoint of the first bridge arm 1311, and the other end of the first inductor L1 is connected to the negative electrode of the first battery pack 110 and the positive electrode of the second battery pack 120, respectively. One end of the second inductor L2 is connected to the midpoint of the second bridge arm 1312, and the other end of the second inductor L2 is connected to the negative electrode of the first battery pack 110 and the positive electrode of the second battery pack 120, respectively. The controller 132 is connected to the full-bridge circuit 131, and the controller 131 is used to control the full-bridge circuit 131 to discharge the first battery pack 110 and/or the second battery pack 120.

According to one embodiment of the present disclosure, the controller 132 is specifically used to: control the full-bridge circuit 131 to be in a stop working state so that the first battery pack 110 and the second battery pack 120 are powered in series; or, control the full-bridge circuit 131 to be in a working state so that the first battery pack 110 and/or the second battery pack 120 are powered.

Specifically, as shown in FIG1 , when the controller 132 controls the full-bridge circuit 131 to be in a stop working state, the first battery pack 110 and the second battery pack 120 are discharged in series to supply power to the load. When the controller 132 controls the full-bridge circuit 131 to be in a working state, the first bridge arm 1311 and the second bridge arm 1312 of the full-bridge circuit 131 are alternately in a working state. When the first bridge arm 1311 is in a working state, the upper bridge arm and the lower bridge arm of the first bridge arm 1311 are alternately turned on. When the controller 132 controls the upper bridge arm of the first bridge arm 1311 to be turned off and the lower bridge arm to be turned on within the first preset time, the second battery pack 120 charges the first inductor L1. When the controller 132 controls the upper bridge arm of the first bridge arm 1311 to be turned on and the lower bridge arm to be turned off within the second preset time, the first inductor L1 releases the stored electric energy to supply power to the load, thereby the first inductor L1 realizes a boost function. At this time, the electric energy provided by the first battery pack 110 to the load is reduced, and the output current becomes smaller. In the same principle, when the second bridge arm 1312 is in the working state, the controller 132 controls the upper bridge arm of the second bridge arm 1312 to be turned off and the lower bridge arm to be turned on, and the second battery pack 120 charges the second inductor L2. When the upper bridge arm of the second bridge arm 1312 is turned on and the lower bridge arm is turned off, the second inductor L2 releases the stored electric energy to supply power to the load, thereby the second inductor L2 realizes the boost function. When the second battery pack 120 charges the first inductor L1 or the second inductor L2, the power supply circuit 100 only supplies power to the load from the first battery pack 110. Repeating this process, when the voltage at the output end of the first inductor L1 (one end connected to the first bridge arm 1311) or the output end of the second inductor L2 (one end connected to the second bridge arm 1312) rises to the same as the bus voltage, the first battery pack 110 is open-circuited, and the output current of the first battery pack 110 becomes zero. At this time, the power supply circuit 100 only supplies power to the load from the second battery pack 120, and the output power of the second battery pack 120 during discharge is higher than the power that the second battery pack 120 itself can output. In this way, the load can be stably powered and the second battery pack 120 can be in a continuous discharge state, thereby reducing the current ripple.

When one bridge arm in the full-bridge circuit 131 fails, for example, the first bridge arm 1311 fails, energy can be stored through the second inductor L2 and the second bridge arm 1312, and the second battery pack 120 can be boosted to supply power to the load, thereby improving the reliability of the power supply circuit 100.

Therefore, the power supply circuit of the embodiment of the present disclosure performs staggered-phase control on the dual bridge arms of the full-bridge circuit through the controller, thereby reducing the control difficulty, enabling the second battery pack to continuously and stably supply power, improving power supply reliability, and reducing current ripple to avoid shortening the battery life due to frequent charging of the battery.

According to an embodiment of the present disclosure, as shown in FIG2 , the power supply circuit 100 further includes: a current sampling circuit 140, which is used to obtain the current of the first battery pack 110 and/or the current of the second battery pack 120, the current of the first inductor L1 and the current of the second inductor L2; and a controller 132, which controls the full-bridge circuit 131 based on the obtained current to supply power to the first battery pack 110 and/or the second battery pack 120. The current sampling circuit 140 may be composed of a current sensor disposed in the circuit, and the current sensor may collect the current of each branch, such as the first battery pack 110, the second battery pack 120, the first inductor L1 and the second inductor L2.

According to an embodiment of the present disclosure, when the first battery pack 110 is discharged, the current sampling circuit 140 acquires the current of the second battery pack 120 ; when the second battery pack 120 is discharged, the current sampling circuit 140 acquires the current of the first battery pack 110 .

That is, when the first battery pack 110 is discharged, the current sampling circuit 140 collects the current of the second battery pack 120; when the second battery pack 120 is discharged, the current sampling circuit collects the current of the first battery pack 110. After acquiring the current of the first battery pack 110 and/or the current of the second battery pack 120, the current of the first inductor L1 and the current of the second inductor L2, the current sampling circuit 140 transmits these current values to the controller 132. The controller 132 generates a control signal according to the current of the first battery pack 110 and/or the current of the second battery pack 120, the current of the first inductor L1 and the current of the second inductor L2. The controller 132 controls the first bridge arm 1311 and the second bridge arm 1312 of the full-bridge circuit 131 to be in an alternating working state according to the control signal, so that the first inductor L1 and the second inductor L2 are alternately charged and discharged, and the second battery pack 120 is continuously boosted.

According to an embodiment of the present disclosure, as shown in FIG3 , the controller 132 includes: a first signal generating unit 1321, a second signal generating unit 1322 and a control unit 1323. The first signal generating unit 1321 is used to generate complementary first control signals and second control signals according to a first current difference between a preset reference current and a current of the first battery pack 110 and/or a current of the second battery pack 120; the second signal generating unit 1322 is used to generate complementary third control signals and fourth control signals according to a second current difference between a current of the first inductor L1 and a current of the second inductor L2; and the control unit 1323 is used to control the full-bridge circuit 131 according to the first control signal, the second control signal, the third control signal and the fourth control signal.

According to one embodiment of the present disclosure, as shown in FIG4, the first signal generating unit 1321 includes: a first subtractor A1, a first regulator B1, a first signal generator P1 and a first inverter N1, the first subtractor A1 is used to obtain a first current difference between a preset reference current and the current of the first battery pack 110 or the current of the second battery pack 120; the first regulator B1 is used to perform proportional integral (PI) adjustment on the first current difference to obtain a first given value; the first signal generator P1 is used to generate a first control signal according to the first given value and the first preset signal; the first inverter N1 is used to invert the first control signal to obtain a second control signal; the second signal generating unit 1322 includes: a second subtractor A2, a second regulator B2, a second signal generator P2 and a second inverter N2, the second subtractor A2 is used to obtain the second current difference between the current of the first inductor L1 and the current of the second inductor L2; the second regulator B2 is used to perform proportional integral (PI) adjustment on the second current difference to obtain a second given value; the second signal generator P2 is used to generate a third control signal according to the second given value and the second preset signal; the second inverter N2 is used to invert the third control signal to obtain a fourth control signal; wherein the first preset signal and the second preset signal are out of phase by half a cycle. wherein the first preset signal and the second preset signal can be sawtooth wave signals, the minimum value of the sawtooth wave signal is 0, and the maximum value is 1.

Specifically, as shown in FIG4 , the current of the first battery pack 110 and/or the current of the second battery pack 120, the current of the first inductor L1 and the current of the second inductor L2 are respectively collected in real time by the current sampling circuit 140, so that the current I of the first battery pack 110 or the current I of the second battery pack 120, the current I1 of the first inductor L1, and the current I2 of the second inductor L2 can be obtained, and the preset reference current Iref and the current I of the first battery pack 110 or the second battery pack 120 are input into the first subtractor A1 for subtraction to obtain a first current difference ΔI1, and the first current difference ΔI1 is used as the input of the first regulator B1 to perform PI regulation on the first current difference ΔI1, so as to obtain a first given value, wherein the first given value is a value fluctuating between 0 and 1. The first given value and the value of the first preset signal STW1 are input into the first signal generator P1 for comparison. If the first given value is greater than the value of the first preset signal STW1, the first signal generator P1 outputs 1, otherwise, it outputs 0, thereby obtaining the first control signal PWM1 with a square wave waveform. The first control signal PWM1 is inverted through the first inverter N1 to obtain the second control signal PWM2.

The current I1 of the first inductor and the current I2 of the second inductor are input to the second subtractor A2 for difference, and the second difference ΔI2 is obtained, and the second difference ΔI2 is used as the input of the second regulator B2 for PI regulation, so as to obtain the second given value, wherein the second given value is a value fluctuating between 0 and 1. The second given value and the value of the second preset signal STW2 are input to the second signal generator P2 for size comparison. If the second given value is greater than the value of the second preset signal STW2, the second signal generator P2 outputs 1, otherwise, it outputs 0, so as to obtain the third control signal PWM3 with a square wave waveform. The third control signal PWM3 is inverted through the second inverter N2 to obtain the fourth control signal PWM4. Since the first preset signal STW1 and the second preset signal STW2 are out of phase by half a cycle, the first control signal PWM1 and the second control signal PWM2 are out of phase with the third control signal PWM3 and the fourth control signal PWM4 by half a cycle, thereby realizing the alternating control of the first bridge arm 1311 and the second bridge arm 1312 of the full-bridge circuit 131.

According to an embodiment of the present disclosure, as shown in FIG5 , the first bridge arm 1311 includes a first upper bridge switch tube M1 and a first lower bridge switch tube M2, one end of the first upper bridge switch tube M1 is connected to the positive electrode of the first battery pack 110, the other end of the first upper bridge switch tube M1 is connected to one end of the first lower bridge switch tube M2 and a first connection point J1 is formed, the other end of the first lower bridge switch tube M2 is connected to the negative electrode of the second battery pack 120, and the first connection point J1 is connected to one end of the first inductor L1; the second bridge arm 1312 includes a second upper bridge switch tube M3 and a second lower bridge switch tube M4, one end of the second upper bridge switch tube M3 is connected to the positive electrode of the first battery pack 110, the other end of the second upper bridge switch tube M3 is connected to one end of the second lower bridge switch tube M4 and a second connection point J2 is formed, the other end of the second lower bridge switch tube M4 is connected to the negative electrode of the second battery pack 120, and the second connection point J2 is connected to one end of the second inductor L2.

According to one embodiment of the present disclosure, the control unit 1323: controls the first upper bridge switch tube M1 of the first bridge arm 1311 according to the first control signal, and controls the first lower bridge switch tube M2 of the first bridge arm 1311 according to the second control signal; controls the second upper bridge switch tube M3 of the second bridge arm 1312 according to the third control signal, and controls the second lower bridge switch tube M4 of the second bridge arm 1312 according to the fourth control signal.

Specifically, as shown in FIG5 , the current sampling circuit 140 can collect the current of the first battery pack 110 and/or the current of the second battery pack 120, the current of the first inductor L1 and the current of the second inductor L2, and the controller 132 generates the PWM control signals corresponding to the first upper bridge switch tube M1, the first lower bridge switch tube M2, the second upper bridge switch tube M3 and the second lower bridge switch tube M4 according to the current of the first battery pack 10 or the current of the second battery pack 120, the current of the first inductor L1 and the current of the second inductor L2. The controller 132 outputs the control signals corresponding to each switch tube to the control end of each switch tube, and can control each switch tube to be turned on or off. It should be understood that if the two switch tubes on the same bridge arm are turned on at the same time and the bridge arm is in a straight-through state, the power supply circuit 100 will be in a short-circuit state, which will damage the first battery pack 110 and the second battery pack 120. Therefore, the first upper bridge switch tube M1 and the first lower bridge switch tube M2 cannot be turned on at the same time, and the second upper bridge switch tube M3 and the second lower bridge switch tube M4 cannot be turned on at the same time. Therefore, the first control signal corresponding to the first upper bridge switch tube M1 can be set to be opposite to the second control signal corresponding to the first lower bridge switch tube M2, the third control signal corresponding to the second upper bridge switch tube M3 and the fourth control signal corresponding to the second lower bridge switch tube M4 can be set to be opposite, and the first control signal corresponding to the first upper bridge switch tube M1 and the third control signal corresponding to the second upper bridge switch tube M3 are out of phase by half a cycle.

When the controller 132 controls the full-bridge circuit 131 to be in working state, the first bridge arm 1311 and the second bridge arm 1312 of the full-bridge circuit 131 are alternately in working state. The control unit 1323 controls the first upper bridge switch tube M1 to be turned on according to the first control signal, and controls the first lower bridge switch tube M2 to be turned off according to the second control signal, so that the electric energy stored in the first inductor L1 is released, and the second battery pack 120 is boosted to supply power to the load; after half a cycle, the control unit 1323 controls the first upper bridge switch tube M1 to be turned off according to the first control signal, and controls the first lower bridge switch tube M2 to be turned on according to the second control signal, and the second battery pack 120, the first inductor L1 and the first lower bridge switch tube M2 form a loop to charge the first inductor L1, and the third control signal controls the second upper bridge switch tube M3 The second upper bridge switch tube M3 is turned on, and the fourth control signal controls the second lower bridge switch tube M4 to turn off, so that the electric energy stored in the second inductor L2 is released, and the second battery pack 120 is boosted to supply power to the load; after continuing for half a cycle, the third control signal controls the second upper bridge switch tube M3 to turn off, and the fourth control signal controls the second lower bridge switch tube M4 to turn on, and the second battery pack 120, the second inductor L2 and the second lower bridge switch tube M4 form a loop to charge the second inductor L2. At the same time, the first control signal controls the first upper bridge switch tube M1 to turn on, and the second control signal controls the first lower bridge switch tube M2 to turn off, so that the first inductor L1 supplies power to the load, and this cycle is repeated.

According to an embodiment of the present disclosure, the control unit 1323 controls the second upper bridge switch tube M3 of the second bridge arm 1312 according to the first control signal when the first bridge arm 1311 fails, and controls the second lower bridge switch tube M4 of the second bridge arm 1312 according to the second control signal.

Specifically, when the first bridge arm 1311 fails, the first inductor L1 cannot supply power to the load. At this time, the current I1 of the first inductor L1 is zero, so the accurate and reasonable third control signal and the fourth control signal cannot be obtained. The control unit 1323 can control the second upper bridge switch tube M3 of the second bridge arm 1312 according to the first control signal, and control the second lower bridge switch tube M4 of the second bridge arm 1312 according to the second control signal. The specific process is: the control unit 1323 controls the second upper bridge switch tube M3 to turn on according to the first control signal PWM1, and at the same time controls the second lower bridge switch tube to turn off according to the second control signal PWM2, so that the electric energy stored in the second inductor L2 is released, and the second battery pack 12 is powered on. 0 is boosted to supply power to the load; after half a cycle, the control unit 1323 controls the second upper bridge switch tube M3 to turn off according to the first control signal PWM1, and controls the second lower bridge switch tube M4 to turn on according to the second control signal PWM2, and the second battery pack 120, the second inductor L2 and the second lower bridge switch tube M4 form a loop to charge the second inductor L2; after half a cycle, the control unit 1323 controls the second upper bridge switch tube M3 to turn on according to the first control signal PWM1, and controls the second lower bridge switch tube M4 to turn off according to the second control signal PWM2, so that the electric energy stored in the second inductor L2 is released, and the second battery pack 120 is boosted to supply power to the load, and the cycle is repeated.

According to an embodiment of the present disclosure, as shown in FIG5 , the first upper bridge switch tube M1 , the first lower bridge switch tube M2 , the second upper bridge switch tube M3 , and the second lower bridge switch tube M4 are all provided with anti-parallel diodes.

Specifically, in the process of the power supply circuit 100 normally supplying power to the load, the first upper bridge switch tube M1 and the first lower bridge switch tube M2 are turned on and off in sequence, and the second upper bridge switch tube M3 and the second lower bridge switch tube M4 are turned on and off in sequence. If the two switch tubes on the same bridge arm are turned on at the same time, the bridge arm is in a straight-through state, and the power supply circuit 100 will be in a short-circuit state, so this state should be avoided. However, the switch tube in the bridge arm is not an ideal device, and its on time and off time are not strictly consistent. In order to avoid the straight-through of the bridge arm, a "dead time" is usually set, and one of the switch tubes in the bridge arm is first controlled to be turned off first, and then another switch tube is turned on at the end of the dead time, thereby avoiding the phenomenon of the straight-through of the bridge arm. Since the switch tubes of the same bridge arm are all in the off state during the dead time, the electric energy stored in the inductor will cause a high-voltage impact on the switch tube, causing damage to the switch tube. The diodes connected in reverse parallel to each switch tube in the bridge arm are used to carry out freewheeling during the dead time, which can avoid damage to the switch tube.

For example, as shown in FIG5 , when the controller 132 controls the first upper bridge switch tube M1 to change from the off state to the on state, the first lower bridge switch tube M2 is first controlled to change from the on state to the off state. During the dead time, the first upper bridge switch tube M1 and the first lower bridge switch tube M2 are both in the off state, and the electric energy stored in the first inductor L1 is continued to flow through the anti-parallel diode D1 of the first upper bridge switch tube M1 to supply power to the load. After the dead time ends, the first upper bridge switch tube M1 changes from the off state to the on state, and the first inductor L1 supplies power to the load through the first upper bridge switch tube M1. In the process of controlling the second upper bridge switch tube M3 to change from the off state to the on state, the electric energy stored in the second inductor L2 is continued to flow through the anti-parallel diode D3 of the second upper bridge switch tube M3. Based on the same principle, when charging the first battery pack 110 and the second battery pack 120, the anti-parallel diode D3 of the first lower bridge switch tube M2 and the anti-parallel diode D4 of the second lower bridge switch tube M4 are used for freewheeling, so that the impact of high voltage on the first lower bridge switch tube M2 and the second lower bridge switch tube M4 can be avoided. The specific principle is the same as that for powering the load, and will not be repeated here.

It should be noted that, for ease of understanding, the switching tubes in Figures 1, 2 and 5 are illustrated as MOSFETs (Metal Oxide Semiconductor Field Effect Transistors), which should not be understood as limitations on the present disclosure. In the embodiments of the present disclosure, the switching tubes may be power switching tubes, MOSFETs, IGBTs (Insulated Gate Bipolar Transistors), SiC (silicon carbide) and other components with on-off functions.

According to an embodiment of the present disclosure, as shown in FIG5 , the power supply circuit 100 further includes: a filter inductor L3 and a filter capacitor C1, wherein the filter inductor L3 is connected in series between the positive electrode of the first battery pack 110 and the full-bridge circuit 131, and the filter capacitor C1 is connected in parallel with the first battery pack 110. The filter inductor L3 can filter the high-frequency components in the power supply current to improve the power supply quality to the load; the filter capacitor C1 can filter the output voltage of the first battery pack 110 to make the output voltage of the first battery pack 110 smooth and stable, and suppress the current ripple of the first battery pack 110 to prevent the output current of the first battery pack 110 from fluctuating near zero, so as to prevent the first battery pack 110 from being quickly charged and discharged at a high frequency, thereby avoiding the problem of reducing the service life of the first battery pack 110, and achieving the purpose of extending the service life of the battery pack.

According to an embodiment of the present disclosure, as shown in FIG. 5 , the power supply circuit 100 further includes: a bus capacitor C2 , which is connected in parallel with the first bridge arm 1311 and the second bridge arm 1312 .

Specifically, when the first bridge arm 1311 and the second bridge arm 1312 are boosted or bucked, the bus capacitor C2 can, on the one hand, filter out fluctuations in the power supply voltage of the power supply circuit 100, so that the voltage provided to the load by the power supply circuit 100 is stable, thereby ensuring the power supply quality to the load; on the other hand, it can reduce the negative impact of the voltage fluctuations jointly generated by the first battery pack 110 and the first inductor L1 and the second inductor L2 on the second battery pack 120.

In one embodiment of the present disclosure, the first battery pack 110 is a power-type battery pack, and the second battery pack 120 is an energy-type battery pack; or, the first battery pack 110 is an energy-type battery pack, and the second battery pack 120 is a power-type battery pack. In the embodiment of the present disclosure, the power-type battery pack is designated as a battery pack with high power density. Among them, the power density designation is: the maximum power of energy transfer per unit weight or volume of the battery during charging and discharging. And in the embodiment of the present disclosure, the voltage value of the power-type battery pack can be set in the range of 100 to 1000V. The energy-type battery pack is a battery pack with high energy density. Among them, the energy density designation is: the energy stored in the battery per unit weight or volume. And in the embodiment of the present disclosure, the voltage value of the energy-type battery pack can be set in the range of 100 to 1000V. Since the power-type battery pack is usually used when the peak power (such as the discharge peak power generated during the traction process and the charging peak power generated during the braking process) is generated during the driving process of the electric vehicle or hybrid vehicle, it is not necessary to be used in other cases. Therefore, in other cases, the output current of the power-type battery pack is expected to be 0.

It should be noted that in the embodiment of the present disclosure, there is no limitation on the specific types of the first battery pack 110 and the second battery pack 120 , which can improve the compatibility of the battery circuit 100 provided in the embodiment of the present application.

In summary, according to the power supply circuit of the embodiment of the present disclosure, the first battery pack and the second battery pack are connected in series to supply power to the load. By staggering the dual bridge arms of the full-bridge circuit through the controller, the control difficulty can be reduced, and the first inductor and the second inductor can be made to store energy respectively to boost the voltage of the second battery pack, so that the second battery pack can stably supply power to the load. Therefore, the circuit can make the second battery pack continuously and stably supply power through the control of the full-bridge circuit by the controller, improve the power supply reliability, reduce the current ripple, and avoid shortening the battery life due to frequent charging of the battery.

Corresponding to the above embodiment, the present disclosure also proposes a power supply control method.

FIG6 is a flow chart of a power supply control method according to an embodiment of the present disclosure.

As shown in FIG6 , the power supply control method of the embodiment of the present disclosure is applied to the above-mentioned power supply circuit, and the method includes the following steps:

S1, obtaining the current of the first battery pack and/or the second battery pack, the current of the first inductor, and the current of the second inductor.

S2, controlling the full-bridge circuit based on the acquired current to supply power to the first battery pack and/or the second battery pack.

According to an embodiment of the present disclosure, the full-bridge circuit is controlled based on the acquired current so that the first battery pack and/or the second battery pack supplies power, including: acquiring a first current difference between a preset reference current and the current of the first battery pack or the current of the second battery pack, and generating a complementary first control signal and a second control signal according to the first current difference; acquiring a second current difference between the current of the first inductor and the current of the second inductor, and generating a complementary third control signal and a fourth control signal according to the second current difference; and controlling the full-bridge circuit according to the first control signal, the second control signal, the third control signal, and the fourth control signal. The preset reference current can be calibrated according to specific parameters of the first battery pack and the second battery pack.

According to an embodiment of the present disclosure, a complementary first control signal and a second control signal are generated according to a first current difference, including: performing proportional-integral adjustment on the first current difference to obtain a first given value, generating a first control signal according to the first given value and a first preset signal, and negating the first control signal to obtain a second control signal; performing proportional-integral adjustment on the second current difference to obtain a second given value, generating a third control signal according to the second given value and a second preset signal, and negating the third control signal to obtain a fourth control signal, wherein the first preset signal and the second preset signal are out of phase by half a cycle. The first preset signal and the second preset signal may be sawtooth wave signals, the minimum value of the sawtooth wave signal is 0, and the maximum value is 1.

According to an embodiment of the present disclosure, a full-bridge circuit is controlled according to a first control signal, a second control signal, a third control signal and a fourth control signal, including: controlling the first upper bridge switch tube of the first bridge arm according to the first control signal, and controlling the first lower bridge switch tube of the first bridge arm according to the second control signal; when the first bridge arm is normal, controlling the second upper bridge switch tube of the second bridge arm according to the third control signal, and controlling the second lower bridge switch tube of the second bridge arm according to the fourth control signal; when the first bridge arm fails, controlling the second upper bridge switch tube of the second bridge arm according to the first control signal, and controlling the second lower bridge switch tube of the second bridge arm according to the second control signal.

It should be noted that for details not disclosed in the power supply control method of the embodiment of the present disclosure, please refer to the details disclosed in the power supply circuit of the embodiment of the present disclosure, and the details will not be repeated here.

In summary, according to the power supply control method of the embodiment of the present disclosure, the current of the first battery pack and/or the second battery pack, the current of the first inductor and the second inductor are obtained, and a control signal is generated based on the obtained current to perform phase-shifting control on the full-bridge circuit. As a result, the method can perform phase-shifting control on the dual bridge arms of the full-bridge circuit, which can reduce the control difficulty, so that the second battery pack can continuously and stably supply power, improve the power supply reliability, and reduce the current ripple to avoid shortening the battery life due to frequent charging of the battery.

Corresponding to the above embodiments, the present disclosure also proposes a computer-readable storage medium.

The computer-readable storage medium of the embodiment of the present disclosure stores a power supply control program, and the power supply control program implements the above-mentioned power supply control method when executed by a processor.

According to the computer-readable storage medium of the embodiment of the present disclosure, by executing the above-mentioned power supply control method, the dual bridge arms of the full-bridge circuit can be staggered-phase controlled, which can reduce the control difficulty, enable the second battery pack to continuously and stably supply power, improve power supply reliability, and reduce current ripple, thereby avoiding shortening the battery life due to frequent charging of the battery.

Corresponding to the above embodiments, the present disclosure also proposes a vehicle.

FIG. 7 is a block diagram of a vehicle according to an embodiment of the present disclosure.

As shown in FIG7 , the vehicle 200 of the embodiment of the present disclosure includes: the power supply circuit 100 of the above embodiment. The power supply circuit 100 is used to supply power to the vehicle 200 .

According to the vehicle of the embodiment of the present disclosure, the second battery pack can continuously and stably supply power through the above-mentioned power supply circuit, thereby improving power supply reliability and reducing current ripple, thereby avoiding shortening of battery life due to frequent charging of the battery.

It should be noted that the logic and/or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

It should be understood that the various parts of the present disclosure can be implemented in hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

In the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

Although the embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are illustrative and are not to be construed as limitations of the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.

Claims (15)

1. A power supply circuit, comprising: A full-bridge circuit, the full-bridge circuit comprising a first bridge arm and a second bridge arm, the first bridge arm and the second bridge arm being connected in parallel and bridged between the positive electrode of the first battery pack and the negative electrode of the second battery pack; a first inductor, one end of the first inductor being connected to the midpoint of the first bridge arm, and the other end of the first inductor being connected to the negative electrode of the first battery pack and the positive electrode of the second battery pack respectively; a second inductor, one end of the second inductor being connected to the midpoint of the second bridge arm, and the other end of the second inductor being connected to the negative electrode of the first battery pack and the positive electrode of the second battery pack respectively; a controller, the controller being connected to the full-bridge circuit, and the controller being used to control the full-bridge circuit so as to supply power to the first battery pack and/or the second battery pack; The controller: controls the full-bridge circuit to be in a non-operating state so that the first battery pack and the second battery pack are connected in series to supply power; or controls the full-bridge circuit to be in an operating state so that the first battery pack and/or the second battery pack are supplied power; The power supply circuit also includes: A current sampling circuit, wherein the current sampling circuit is used to obtain the current of the first battery pack and/or the second battery pack, the current of the first inductor, and the current of the second inductor; The controller controls the full-bridge circuit based on the acquired current so that the first battery pack and/or the second battery pack supplies power; The controller comprises: a first signal generating unit, configured to generate complementary first control signals and second control signals according to a first current difference between a preset reference current and a current of the first battery pack and/or a current of the second battery pack; a second signal generating unit, configured to generate a complementary third control signal and a fourth control signal according to a second current difference between a current of the first inductor and a current of the second inductor; A control unit controls the full-bridge circuit based on the first control signal, the second control signal, the third control signal, and the fourth control signal. 2. The power supply circuit according to claim 1, characterized in that the first signal generating unit comprises: a first subtractor, a first regulator, a first signal generator and a first inverter, the first subtractor is used to obtain a first current difference between the preset reference current and the current of the first battery pack or the current of the second battery pack; the first regulator is used to perform proportional-integral regulation on the first current difference to obtain a first given value; the first signal generator is used to generate the first control signal according to the first given value and the first preset signal; the first inverter is used to invert the first control signal to obtain the second control signal; The second signal generating unit includes: a second subtractor, a second regulator, a second signal generator and a second inverter, wherein the second subtractor is used to obtain a second current difference between the current of the first inductor and the current of the second inductor; the second regulator is used to perform proportional integral regulation on the second current difference to obtain a second given value; the second signal generator is used to generate the third control signal according to the second given value and the second preset signal; the second inverter is used to invert the third control signal to obtain the fourth control signal; The first preset signal and the second preset signal are out of phase with each other by half a cycle. 3. The power supply circuit according to any one of claims 1-2, characterized in that when the first battery pack is discharged, the current sampling circuit obtains the current of the second battery pack; when the second battery pack is discharged, the current sampling circuit obtains the current of the first battery pack. 4. The power supply circuit according to claim 1, characterized in that: The first bridge arm includes a first upper bridge switch tube and a first lower bridge switch tube, one end of the first upper bridge switch tube is connected to the positive electrode of the first battery pack, the other end of the first upper bridge switch tube is connected to one end of the first lower bridge switch tube and forms a first connection point, the other end of the first lower bridge switch tube is connected to the negative electrode of the second battery pack, and the first connection point is connected to one end of the first inductor; The second bridge arm includes a second upper bridge switch tube and a second lower bridge switch tube, one end of the second upper bridge switch tube is connected to the positive electrode of the first battery pack, the other end of the second upper bridge switch tube is connected to one end of the second lower bridge switch tube and forms a second connection point, the other end of the second lower bridge switch tube is connected to the negative electrode of the second battery pack, and the second connection point is connected to one end of the second inductor. 5 . The power supply circuit according to claim 4 , wherein the first upper bridge switch tube, the first lower bridge switch tube, the second upper bridge switch tube and the second lower bridge switch tube are all provided with anti-parallel diodes. 6. The power supply circuit according to claim 4 or 5 is characterized in that the control unit: controls the first upper bridge switch tube of the first bridge arm according to the first control signal, and controls the first lower bridge switch tube of the first bridge arm according to the second control signal; controls the second upper bridge switch tube of the second bridge arm according to the third control signal, and controls the second lower bridge switch tube of the second bridge arm according to the fourth control signal. 7. The power supply circuit according to claim 6 is characterized in that the control unit: when the first bridge arm fails, controls the second upper bridge switch tube of the second bridge arm according to the first control signal, and controls the second lower bridge switch tube of the second bridge arm according to the second control signal. 8. The power supply circuit according to any one of claims 1-2 is characterized in that the power supply circuit also includes: a filter inductor and a filter capacitor, the filter inductor is connected in series between the positive electrode of the first battery pack and the full-bridge circuit, and the filter capacitor is connected in parallel with the first battery pack. 9. The power supply circuit according to any one of claims 1-2, characterized in that the power supply circuit further comprises: a bus capacitor, wherein the bus capacitor is connected in parallel with the first bridge arm and the second bridge arm. 10. The power supply circuit according to any one of claims 1-2, characterized in that the first battery pack is a power type battery pack, and the second battery pack is an energy type battery pack; or, the first battery pack is an energy type battery pack, and the second battery pack is a power type battery pack. 11. A power supply control method, characterized in that it is applied to the power supply circuit according to any one of claims 1 to 10, the method comprising: Acquire a current of the first battery pack and/or the second battery pack, and a current of the first inductor and the second inductor; Controlling the full-bridge circuit based on the acquired current so that the first battery pack and/or the second battery pack supplies power; The controlling the full-bridge circuit based on the acquired current so that the first battery pack and/or the second battery pack supplies power includes: Acquire a first current difference between a preset reference current and a current of the first battery pack or a current of the second battery pack, and generate complementary first control signals and second control signals according to the first current difference; Acquire a second current difference between the current of the first inductor and the current of the second inductor, and generate a complementary third control signal and a fourth control signal according to the second current difference; The full-bridge circuit is controlled according to the first control signal, the second control signal, the third control signal and the fourth control signal. 12. The power supply control method according to claim 11, wherein generating a complementary first control signal and a second control signal according to the first current difference comprises: Performing proportional-integral regulation on the first current difference to obtain a first given value, generating the first control signal according to the first given value and a first preset signal, and inverting the first control signal to obtain the second control signal; The second current difference is proportionally and integrally adjusted to obtain a second given value, and the third control signal is generated according to the second given value and a second preset signal, and the third control signal is inverted to obtain the fourth control signal, wherein the first preset signal and the second preset signal are out of phase by half a cycle. 13. The power supply control method according to claim 11 or 12, characterized in that the controlling the full-bridge circuit according to the first control signal, the second control signal, the third control signal and the fourth control signal comprises: Controlling the first upper bridge switch tube of the first bridge arm according to the first control signal, and controlling the first lower bridge switch tube of the first bridge arm according to the second control signal; When the first bridge arm is normal, the second upper bridge switch tube of the second bridge arm is controlled according to the third control signal, and the second lower bridge switch tube of the second bridge arm is controlled according to the fourth control signal; when the first bridge arm fails, the second upper bridge switch tube of the second bridge arm is controlled according to the first control signal, and the second lower bridge switch tube of the second bridge arm is controlled according to the second control signal. 14. A computer-readable storage medium, characterized in that a power supply control program is stored thereon, and when the power supply control program is executed by a processor, the power supply control method according to any one of claims 11 to 13 is implemented. 15. A vehicle, characterized by comprising a power supply circuit according to any one of claims 1 to 10, wherein the power supply circuit is used to supply power to the vehicle.