CN110816274A - Power supply control device, automobile and power supply control method of automobile - Google Patents

Power supply control device, automobile and power supply control method of automobile Download PDF

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Publication number
CN110816274A
CN110816274A CN201911121987.1A CN201911121987A CN110816274A CN 110816274 A CN110816274 A CN 110816274A CN 201911121987 A CN201911121987 A CN 201911121987A CN 110816274 A CN110816274 A CN 110816274A
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CN
China
Prior art keywords
power supply
automobile
power
state
voltage
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Pending
Application number
CN201911121987.1A
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Chinese (zh)
Inventor
胡余生
牛高产
郭伟林
陈建清
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN201911121987.1A priority Critical patent/CN110816274A/en
Publication of CN110816274A publication Critical patent/CN110816274A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • B60L1/003—Supplying electric power to auxiliary equipment of vehicles to auxiliary motors, e.g. for pumps, compressors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors

Abstract

The invention discloses a power supply control device, an automobile and a power supply control method thereof, wherein the device comprises: the switch unit is arranged between a first power supply source of the automobile and an electric unit of the automobile; the control unit is used for determining whether a first power supply of the automobile is powered off or not; if the first power supply is not powered off, the switch unit is controlled to be in an on state so as to supply power through the first power supply; if the first power supply is powered off, the control switch unit is in an off state, the main motor of the automobile is controlled to be converted into a generator state from a motor state, and electric quantity obtained by power generation of the main motor in the generator state is controlled to charge the energy storage unit; and the energy storage unit is used for supplying power to at least part of the power utilization units of the automobile under the condition that the electric quantity generated by the main motor in the state of the generator reaches the set power supply electric quantity. According to the scheme, the problem that the system reliability is influenced due to the fact that the auxiliary steering oil pump motor cannot work in a power failure mode when the high-voltage power supply outputs abnormally can be solved, and the system reliability is improved.

Description

Power supply control device, automobile and power supply control method of automobile
Technical Field
The invention belongs to the technical field of automobiles, and particularly relates to a power supply control device, an automobile and a power supply control method thereof, in particular to a power supply system of an integrated controller, an automobile with the power supply system and a power supply control method thereof.
Background
In an electric vehicle control system, integration of controllers has the advantages of low cost, compact space and the like, and five-in-one integrated controllers integrating main drive, brake oil pump drive, steering air pump drive, DC/DC and Protocol Data Unit (PDU) gradually become a mainstream technical scheme.
The five-in-one integrated controller has two power supply systems, namely a power supply and a control signal power supply. Wherein, the strong electricity high voltage battery provides the high voltage power supply for the five-in-one controller, the power supply is the power supply, the weak electricity low voltage battery provides the low voltage control power supply for the five-in-one controller, and the power supply is the control signal power supply. In the application of the five-in-one controller, the power failure of the high-voltage power supply causes the power failure protection of the steering air pump driving controller, so that the steering wheel power-assisted steering motor cannot work, and the dangerous condition that the steering wheel cannot operate occurs.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention aims to provide a power supply control device, an automobile and a power supply control method thereof aiming at the defects, so as to solve the problem that the system reliability is influenced because the auxiliary steering oil pump motor cannot work due to power failure when the output of a high-voltage power supply is abnormal in an electric vehicle control system, and achieve the effect of improving the system reliability.
The present invention provides a power supply control device, including: the energy storage device comprises a switch unit, a control unit and an energy storage unit; the switch unit is arranged between a first power supply of the automobile to be subjected to power supply control and an electric unit of the automobile; the control unit is used for determining whether a first power supply of the automobile is powered off or not; if the first power supply is not powered off, the switch unit is controlled to be in an on state so as to supply power through the first power supply; if the first power supply is powered off, the control switch unit is in an off state, the main motor of the automobile is controlled to be converted into a generator state from a motor state, and electric quantity obtained by power generation of the main motor in the generator state is controlled to charge the energy storage unit; and the energy storage unit is used for supplying power to at least part of the power utilization units of the automobile under the condition that the electric quantity generated by the main motor in the state of the generator reaches the set power supply electric quantity.
Optionally, the control unit determines whether a first power supply of the vehicle is powered off, including: the method comprises the steps of obtaining the direct current bus voltage of a first power supply of the automobile, determining whether the direct current bus voltage of the first power supply is lower than a set voltage or not, determining that the first power supply is powered off under the condition that the direct current bus voltage of the first power supply is lower than the set voltage, and determining that the first power supply is not powered off under the condition that the direct current bus voltage of the first power supply is not lower than the set voltage.
Optionally, the control unit controls a main motor of the automobile to be switched from a motor state to a generator state, and includes: and controlling a first group of power switching devices in a power switching device module of a three-phase full-bridge inverter in a power control unit of the main motor to be in a turn-off state, and simultaneously controlling a second group of power switching devices in the power switching device module of the three-phase full-bridge inverter to be in a turn-on state, so that a three-phase winding of the main motor is in short circuit to form a closed loop.
Optionally, the controlling unit controls the main motor to generate electricity in the generator state to charge the energy storage unit, including: and under the condition that the electric quantity generated by the main motor in the state of the generator reaches the set charging electric quantity, the second group of power switching devices in the power switching device module of the three-phase full-bridge inverter in the power control unit of the main motor is controlled to be in an off state, so that the current in the three-phase winding of the main motor flows to the energy storage unit through the follow current elements in the first group of power devices to charge the energy storage unit.
Optionally, wherein, the power unit of the automobile comprises: the system comprises a main drive controller of the automobile, an auxiliary steering oil pump controller of the automobile and a brake air pump controller of the automobile; partial unit in a power unit of a motor vehicle, comprising: an auxiliary steering oil pump controller of the automobile and a brake air pump controller of the automobile; and/or, an energy storage unit comprising: supporting the capacitor.
Optionally, the control unit is a main drive controller of the automobile; in the case where the control unit is a main drive controller of an automobile, the power consumption unit of the automobile further includes: a DC/DC module; this power supply control device still includes: a second power supply; the DC/DC module and the second power supply are arranged between the first power supply and a main drive controller of the automobile and used for supplying power to the main drive controller of the automobile.
Optionally, the second power supply includes: batteries and low voltage systems; the storage battery supplies power to a low-voltage system; the low-voltage system supplies power to the low-voltage link of each controller of the automobile; and meanwhile, the low-voltage system supplies power to low-voltage equipment on the vehicle.
In accordance with the above apparatus, a further aspect of the present invention provides an automobile comprising: the above-described power supply control device.
In another aspect, the present invention provides a power supply control method for an automobile, including: determining whether a first power supply of the automobile is powered off or not through a control unit; if the first power supply is not powered off, the switch unit is controlled to be in an on state so as to supply power through the first power supply; the switch unit is arranged between a first power supply of the automobile to be subjected to power supply control and an electric unit of the automobile; if the first power supply is powered off, the control switch unit is in an off state, the main motor of the automobile is controlled to be converted into a generator state from a motor state, and electric quantity obtained by power generation of the main motor in the generator state is controlled to charge the energy storage unit; and supplying power to at least part of the power utilization units of the automobile through the energy storage unit under the condition that the electric quantity generated by the main motor in the state of the generator reaches the set power supply electric quantity.
Optionally, determining whether the first power supply of the vehicle is powered off comprises: the method comprises the steps of obtaining the direct current bus voltage of a first power supply of the automobile, determining whether the direct current bus voltage of the first power supply is lower than a set voltage or not, determining that the first power supply is powered off under the condition that the direct current bus voltage of the first power supply is lower than the set voltage, and determining that the first power supply is not powered off under the condition that the direct current bus voltage of the first power supply is not lower than the set voltage.
Alternatively, controlling the main motor of the vehicle to be switched from the motor state to the generator state includes: and controlling a first group of power switching devices in a power switching device module of a three-phase full-bridge inverter in a power control unit of the main motor to be in a turn-off state, and simultaneously controlling a second group of power switching devices in the power switching device module of the three-phase full-bridge inverter to be in a turn-on state, so that a three-phase winding of the main motor is in short circuit to form a closed loop.
Optionally, controlling the main motor to generate the electric power in the generator state to charge the energy storage unit includes: and under the condition that the electric quantity generated by the main motor in the state of the generator reaches the set charging electric quantity, the second group of power switching devices in the power switching device module of the three-phase full-bridge inverter in the power control unit of the main motor is controlled to be in an off state, so that the current in the three-phase winding of the main motor flows to the energy storage unit through the follow current elements in the first group of power devices to charge the energy storage unit.
Optionally, wherein, the power unit of the automobile comprises: the system comprises a main drive controller of the automobile, an auxiliary steering oil pump controller of the automobile and a brake air pump controller of the automobile; partial unit in a power unit of a motor vehicle, comprising: an auxiliary steering oil pump controller of the automobile and a brake air pump controller of the automobile; and/or, an energy storage unit comprising: supporting the capacitor.
Optionally, the control unit is a main drive controller of the automobile; in the case where the control unit is a main drive controller of an automobile, the power consumption unit of the automobile further includes: a DC/DC module; the power supply control method further comprises the following steps: and supplying power to a main drive controller of the automobile through the DC/DC module and a second power supply.
According to the scheme, the IGBT working power supply mode in the main drive controller in the five-in-one controller is adopted, so that the problem that the high-voltage power supply of the steering auxiliary air pump cannot work abnormally is solved under the conditions that the power supply is not increased and the design of the motor is improved, the cost and the complexity of the system are not increased, and the reliability of the system is ensured.
Further, according to the scheme of the invention, when the high-voltage power supply system of the electric vehicle is normal, the main driving controller, the auxiliary steering oil pump controller and the brake air pump controller adopt a mode of taking electricity from the high-voltage battery; when the high-voltage power supply system is abnormal, the main drive controller is adopted to drive the main motor to work in a generator state, and power is supplied to the auxiliary steering oil pump through the support capacitor, so that the problem that the high-voltage power supply of the steering auxiliary air pump cannot work abnormally is solved under the conditions that the power supply is not increased and the design condition of the motor is improved, and the reliability of the system is improved.
Further, according to the scheme of the invention, when the high-voltage power supply system of the electric vehicle is normal, the main driving controller, the auxiliary steering oil pump controller and the brake air pump controller adopt a mode of taking electricity from the high-voltage battery; when the high-voltage power supply system is abnormal, the main drive controller is adopted to drive the main motor to work in a generator state, and the auxiliary steering oil pump is supplied with power through the support capacitor, so that the reliability of the system is ensured, and the cost and the complexity of the system do not need to be increased.
Therefore, according to the scheme of the invention, when the high-voltage power supply system of the electric vehicle is normal, the main driving controller, the auxiliary steering oil pump controller and the brake air pump controller adopt a mode of taking electricity from the high-voltage battery; when the high-voltage power supply system is abnormal, a main drive controller is adopted to drive a main motor to work in a generator state, and power is supplied to an auxiliary steering oil pump through a support capacitor; the problem of among the electric motor car control system, supplementary steering oil pump motor loses power and can't work and influence system reliability when high voltage power supply output is unusual is solved, reaches the effect that promotes system reliability.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic structural diagram of a power supply control device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an integrated controller power topology system of an embodiment of an automobile of the present invention;
FIG. 3 is a schematic diagram of energy flow transfer under normal operating conditions for an embodiment of an automobile of the present invention;
FIG. 4 is a schematic diagram of the energy flow transfer in the event of a high voltage abnormal power outage of an embodiment of an automobile of the present invention;
FIG. 5 is a schematic diagram of an energy flow control process for an embodiment of the vehicle of the present invention;
FIG. 6 is a schematic diagram of a power board configuration of a main drive controller according to an embodiment of the present invention;
fig. 7 is a flowchart illustrating a power supply control method according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to an embodiment of the present invention, there is provided a power supply control device. Referring to fig. 1, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The power supply control device can be applied to power supply control of an electric automobile, and the power supply control device can comprise: switch unit, control unit and energy storage unit.
Specifically, the switch unit is arranged between a first power supply of the automobile to be subjected to power supply control and a power utilization unit of the automobile.
That is to say, the switch unit is arranged between a first power supply of an automobile to be subjected to power supply control, such as an electric automobile, and an electricity utilization unit of the automobile, such as an all-in-one controller, and can be used for being in an on state under the condition that the first power supply of the automobile is not powered off so as to realize power supply connection between the first power supply of the automobile and the electricity utilization unit of the automobile, so that the electricity is supplied through the first power supply of the automobile, namely the electricity is supplied to the electricity utilization unit of the automobile through the first power supply of the automobile. The first power supply may be a high-voltage power supply system of an automobile such as an electric automobile. The power utilization unit can be a main driving controller, a steering oil pump controller, a brake air pump controller and a DC/DC module of an automobile. The switching unit may include: and controlling the switch.
For example: the switch unit can be a single-pole double-throw switch or a relay. For example: as shown in fig. 3, under the normal operation condition of the electric vehicle, the relay K1 is in a closed state, the high-voltage battery simultaneously supplies power to the main driver, the oil pump controller and the air pump controller, and the main driver controller controls the main motor to work in a normal state. When the whole vehicle finds that the high voltage is in problem, the relay K1 is switched off to cut off the main loop.
In particular, the control unit may be configured to determine whether a first power supply of the vehicle is powered off. If the first power supply is not powered off, the switch unit is controlled to be in an on state (for example, the switch unit is controlled to be on under the condition that the switch unit is not powered on, and the switch unit is controlled to be in the on state under the condition that the switch unit is powered on) so as to supply power through the first power supply. If the first power supply is powered off, the switch unit is controlled to be in an off state (for example, the switch unit is controlled to be turned off under the condition that the switch unit is not turned off, and the switch unit is controlled to maintain the off state under the condition that the switch unit is turned off), the main motor of the automobile is controlled to be converted into a generator state from a motor state, and if the main motor of the automobile is controlled to be converted into the generator state from a normal working state, namely, the motor state), the electric quantity generated by the main motor in the generator state is also controlled to charge the energy storage unit. For example: the control unit can be used for controlling the switch unit to be in a closed state under the condition that the first power supply of the automobile is powered off so as to realize disconnection of power supply connection between the first power supply of the automobile and the power utilization unit of the automobile and control a main motor of the automobile to work in a generator state. The automobile is an automobile to be subjected to power supply control, and particularly an electric automobile to be subjected to power supply control.
Alternatively, the control unit determining whether the first power supply source of the vehicle is powered off may include: the method comprises the steps of obtaining the direct current bus voltage of a first power supply of the automobile, determining whether the direct current bus voltage of the first power supply is lower than a set voltage or not, determining that the first power supply is powered off under the condition that the direct current bus voltage of the first power supply is lower than the set voltage, and determining that the first power supply is not powered off under the condition that the direct current bus voltage of the first power supply is not lower than the set voltage.
For example: as shown in fig. 5, during the operation of the vehicle, when the main drive controller (e.g., the main driver in fig. 2) detects that the dc bus voltage UDC is lower than a certain threshold (e.g., 400V), it determines that the high-voltage power supply is powered off, and at this time, the main drive controller controls the main motor to use the electric motor as a generator, so as to realize that the current of the motor winding flows to the bus support capacitor C to charge the bus support capacitor C; the bus support capacitor is used as a direct-current power supply after stabilizing a certain voltage range, and provides high voltage for the auxiliary steering oil pump controller and the brake air pump controller, so that the steering mechanism and the brake system still continue to work normally, and the purpose of stable and safe parking of the vehicle is achieved.
Therefore, the first power supply source of the automobile is determined to be powered off under the condition that the voltage of the direct current bus of the first power supply source of the automobile is lower than the set voltage, so that the determination mode of whether the first power supply source of the automobile is powered off abnormally is simple and convenient, and the determination result is reliable.
Alternatively, the controlling unit controls the main motor of the automobile to be switched from the motor state to the generator state, and may include: and controlling a first group of power switching devices in a power switching device module of a three-phase full-bridge inverter in a power control unit of the main motor to be in a turn-off state, and simultaneously controlling a second group of power switching devices in the power switching device module of the three-phase full-bridge inverter to be in a turn-on state, so that a three-phase winding of the main motor is in short circuit to form a closed loop.
The power switching device module of the three-phase full-bridge inverter in the power control unit of the main motor may include: a first set of power switches and a second set of power switches. The first set of power switches may be any set of power switches in the power switch module.
For example: as shown in fig. 6, when the main drive controller detects that the high-voltage power supply is cut off, the power switching devices Q1, Q3 and Q5 of the three-phase full-bridge inverter are controlled to be in an off state, and meanwhile, the power switching devices Q2, Q4 and Q6 are controlled to be in an on state, three-phase windings of the main motor are in short circuit together to form a closed loop. Alternatively, in the process of converting the motor into the generator, the power switching devices Q2, Q4 and Q6 of the three-phase full-bridge inverter can be controlled to be in an off state, and the power switching devices Q1, Q3 and Q5 are controlled to be in an on state, so that the three-phase windings of the main motor are short-circuited to form a closed loop.
Therefore, the three-phase winding of the main motor can be in short circuit to form a closed loop circuit to work in a generator state by controlling the first group of power switching devices in the power switching device module of the three-phase full-bridge inverter in the power control unit of the main motor to be in a turn-off state and controlling the second group of power switching devices to be in a turn-on state, the control mode is simple and convenient, and the control result is reliable.
More optionally, the controlling unit controls the main motor to generate the electric power to charge the energy storage unit in the generator state, and may include: and under the condition that the electric quantity generated by the main motor in the state of the generator reaches the set charging electric quantity, the second group of power switching devices in the power switching device module of the three-phase full-bridge inverter in the power control unit of the main motor is controlled to be in an off state, so that the current in the three-phase winding of the main motor flows to the energy storage unit through the follow current elements in the first group of power devices to charge the energy storage unit.
For example: as shown in fig. 6, when the control current reaches a predetermined value, the power switches Q2, Q4, and Q6 are controlled to be in an off state, and the current in the main motor winding flows to the bus support capacitor C through the diodes D1, D3, and D5 of the upper bridge to charge the bus support capacitor C, and the voltage across the capacitor is controlled to be stable within a certain range. Therefore, the purpose of reversing the current flowing in the motor winding is achieved, and the main motor works in a generator state.
Therefore, the on-off states of two groups of power switching devices in the power switching devices of the three-phase full-bridge inverter in the power control unit of the main motor are controlled to be interchanged under the condition that the electric quantity generated by the main motor in the state of the generator reaches the set charging electric quantity, so that the current in the three-phase winding of the main motor flows to the energy storage unit through the follow current elements in the first group of power switching devices to charge the energy storage unit, and the electric quantity generated by the main motor is used for conveniently and reliably charging the energy storage element.
Specifically, the energy storage unit can be used for storing electric quantity obtained by power generation of a main motor of an automobile under the condition that the main motor works in a generator state; and under the condition that the electric quantity generated by the main motor in the state of the generator reaches the set power supply electric quantity, at least supplying power to part of the power utilization units of the automobile, such as an auxiliary steering oil pump controller and a brake air pump controller in the power utilization units of the automobile.
For example: a power supply system under the condition of abnormal power failure of a high-voltage power supply of an electric automobile adopts an IGBT working power supply mode in a main drive controller in a five-in-one controller, solves the problem that the high-voltage power supply of a steering auxiliary air pump can not work abnormally under the condition of not increasing power supplies and improving the design of a motor, namely solves the problem that the motor of the auxiliary steering oil pump can not work when the output of the high-voltage power supply in an electric automobile control system is abnormal; moreover, the system cost and complexity are not increased, and the system reliability is ensured.
Therefore, the normal operation of the power utilization unit of the automobile under the power supply of the first power supply source is kept under the condition that the first power supply source of the automobile is determined not to be powered off; and under the condition that the first power supply source of the automobile is determined to be powered off, the power supply path of the first power supply source is cut off to ensure safe disconnection between the first power supply source and the power utilization unit of the automobile, the main motor of the automobile is controlled to be used as a generator to generate power and store the power through the energy storage unit, and when the electric quantity of the stored power reaches the set power supply electric quantity, part of units in the power utilization unit are powered by the electric quantity of the stored power, so that normal work of the part of units is realized, and the reliability of the system is improved.
Alternatively, the power unit of the automobile may include: the system comprises a main drive controller of the automobile, an auxiliary steering oil pump controller of the automobile and a brake air pump controller of the automobile. Some of the electrical units of the motor vehicle may comprise: an auxiliary steering oil pump controller of an automobile and a brake air pump controller of the automobile.
For example: in fig. 2, a power supply mode of a common direct current capacitor bus is adopted for high voltage of a main drive controller, an auxiliary steering oil pump controller (namely, an oil pump controller in fig. 2) and a brake air pump controller (namely, an air pump controller in fig. 2), and when a high-voltage power supply system of the electric vehicle is normal, the main drive controller, the auxiliary steering oil pump controller and the brake air pump controller adopt a mode of getting power from a high-voltage battery; when the high-voltage power supply system is abnormal, the main drive controller is adopted to drive the main motor to work in a generator state, power is supplied to the auxiliary steering oil pump through the support capacitor, energy flows from the main drive motor to the steering oil pump, and the problem that the auxiliary steering oil pump cannot work when the high-voltage power supply system is abnormal is solved. Through the effective implementation mode that the main drive controller controls the main motor current to flow to the supporting capacitor, the direct-current bus voltage of the five-in-one controller can be controlled to be stabilized within a certain voltage range, a high-voltage power supply is provided for the auxiliary steering oil pump controller, and the operability and the driving safety of a steering wheel in the driving process of a vehicle are guaranteed.
Therefore, under the condition that the first power supply of the automobile is powered off, the main motor is used for generating power to supply power to the auxiliary steering oil pump controller and the brake air pump controller, the problem that the auxiliary steering oil pump motor cannot work due to power failure when the output of the high-voltage power supply is abnormal can be avoided, and the reliability and the safety of the operation of the system are improved.
Optionally, the energy storage unit may include: supporting the capacitor.
For example: as shown in fig. 2, the main drive controller, the auxiliary steering oil pump controller and the brake air pump controller adopt a power supply mode of sharing a direct current capacitor bus at high voltage, and when the high-voltage power supply system of the electric vehicle is normal, the main drive controller, the auxiliary steering oil pump controller and the brake air pump controller take electricity from a high-voltage battery through a relay K1; when the high-voltage power supply system is abnormal, the control system disconnects K1, the main drive controller drives the main motor to work in a generator state, power is supplied to the auxiliary steering oil pump through the support capacitor C1 in a controlled and stable mode, energy flows from the main drive motor to the steering oil pump, and the problem that the auxiliary steering oil pump cannot work when the high-voltage power supply system is abnormal is solved.
Therefore, the supporting capacitor is used as the energy storage unit, the structure is simple, and the safety and the reliability of energy storage can be guaranteed.
Optionally, the control unit is a main drive controller of the automobile. In the case where the control unit is a main drive controller of an automobile, the power consumption unit of the automobile may further include: a DC/DC module. The power supply control device may further include: and a second power supply. The DC/DC module and the second power supply are arranged between the first power supply and a main drive controller of the automobile and can be used for supplying power to the main drive controller of the automobile. The DC/DC module is connected in front of a relay K1 on the first power supply such as a high-voltage battery end, and low voltage is generated by the DC/DC module to supply power to the main driver, and the weak voltage, namely the low voltage exists no matter whether the first power supply such as the high-voltage battery end is powered off or not.
Optionally, the second power supply may include: batteries and low voltage systems; the storage battery supplies power to a low-voltage system; the low-voltage system supplies power to the low-voltage link of each controller of the automobile; and meanwhile, the low-voltage system supplies power to low-voltage equipment on the vehicle.
For example: the second power supply may be a low voltage power supply system of the vehicle. The low-voltage power supply system may include: batteries and low voltage systems. The first power supply is connected to a main drive controller (namely a main driver) of the automobile after sequentially passing through the DC/DC module, the storage battery and the low-voltage system.
The 24V storage battery supplies power for the low-voltage system; the low-voltage system supplies power to the low-voltage links of the controllers; meanwhile, the low-voltage system supplies power to low-voltage 24V equipment on the vehicle.
Therefore, the main driving controller of the automobile is used as the control unit, a control device does not need to be additionally arranged, the structure is simple, and the reliability and timeliness of control can be guaranteed.
Through a large number of tests, the technical scheme of the invention adopts the IGBT working power supply mode in the main drive controller in the five-in-one controller, so that the problem that the high-voltage power supply of the steering auxiliary air pump can not work abnormally is solved under the conditions of not increasing the power supply and improving the motor design, the cost and the complexity of the system are not increased, and the reliability of the system is ensured.
According to the embodiment of the invention, the automobile corresponding to the power supply control device is also provided. The automobile may include: the above-described power supply control device.
Aiming at the problems that a steering air pump drive controller is subjected to power-down protection caused by power failure of a high-voltage power supply, so that a steering wheel power-assisted steering motor cannot work and the steering wheel cannot operate in a dangerous condition, an auxiliary power supply or a motor duplex winding design method can be used for solving the problems, for example, a dual-power supply system of a standby power supply is adopted to ensure the power supply of the power-assisted steering motor drive controller, and the power-assisted steering motor is ensured to work by switching the two power supply systems; the method comprises the steps that through standby low-voltage to high-voltage DC/DC, when a high-voltage power supply fails to work, the low-voltage to high-voltage DC/DC is used for supplying power to a steering motor; a high-voltage winding and a low-voltage winding are integrated in the power-assisted steering motor, and the low-voltage winding is started to ensure the normal work of the power-assisted steering system after the high voltage is abnormally cut off. However, the methods cannot avoid high cost of the control system, increase complexity of the system and have low reliability.
In an optional embodiment, the scheme of the invention provides a power supply system under the condition of abnormal power failure of a high-voltage power supply of an electric automobile, and solves the problem that an auxiliary steering oil pump motor cannot work due to power failure when the output of the high-voltage power supply is abnormal in an electric automobile control system.
Optionally, according to the scheme of the invention, an IGBT working power supply mode in a main drive controller in a five-in-one controller is adopted, so that the problem that a high-voltage power supply of a steering auxiliary air pump cannot work abnormally is solved under the conditions that a power supply is not increased and the design of a motor is improved, the cost and complexity of the system are not increased, and the reliability of the system is ensured.
In an alternative example, the solution of the present invention proposes a power topology system of a "five-in-one" integrated controller, which can be seen in the example shown in fig. 2. In fig. 2, a power supply mode of a common direct current capacitor bus is adopted for high voltage of a main drive controller, an auxiliary steering oil pump controller (namely, an oil pump controller in fig. 2) and a brake air pump controller (namely, an air pump controller in fig. 2), and when a high-voltage power supply system of the electric vehicle is normal, the main drive controller, the auxiliary steering oil pump controller and the brake air pump controller adopt a mode of getting power from a high-voltage battery; when the high-voltage power supply system is abnormal, the main drive controller is adopted to drive the main motor to work in a generator state, power is supplied to the auxiliary steering oil pump through the support capacitor, energy flows from the main drive motor to the steering oil pump, and the problem that the auxiliary steering oil pump cannot work when the high-voltage power supply system is abnormal is solved. The effective implementation mode of the main drive controller for controlling the main motor current to flow to the support capacitor provided by the invention can control the direct current bus voltage of the five-in-one controller to be stabilized in a certain voltage range, provides a high-voltage power supply for the auxiliary steering oil pump controller, and ensures the operability and the driving safety of a steering wheel in the driving process of a vehicle.
In an alternative embodiment, the invention provides a method for supplying power to a power supply system in an abnormal power failure condition of an electric vehicle in a high-voltage power failure, and the embodiment of the method can refer to the examples shown in fig. 2 to 6. Referring to the examples shown in fig. 2 to fig. 6, a specific implementation process of the scheme of the present invention is exemplarily described below.
FIG. 2 may show a power topology system for a "five in one" integrated controller. As shown in fig. 2, the main drive controller, the auxiliary steering oil pump controller and the brake air pump controller adopt a power supply mode of sharing a direct current capacitor bus at high voltage, and when the high-voltage power supply system of the electric vehicle is normal, the main drive controller, the auxiliary steering oil pump controller and the brake air pump controller take electricity from a high-voltage battery through a relay K1; when the high-voltage power supply system is abnormal, the control system disconnects K1, the main drive controller drives the main motor to work in a generator state, power is supplied to the auxiliary steering oil pump through the support capacitor C1 in a controlled and stable mode, energy flows from the main drive motor to the steering oil pump, and the problem that the auxiliary steering oil pump cannot work when the high-voltage power supply system is abnormal is solved.
In an alternative embodiment, the energy flow transmission diagram under the normal condition is shown in fig. 3, in the normal operation condition of the electric vehicle, the relay K1 is in the closed state, the high-voltage battery simultaneously supplies power to the main driver, the oil pump controller and the air pump controller, and the main driver controller controls the main motor to work in the normal state. When the whole vehicle finds that high voltage has a problem, the relay K1 is switched off to cut off a main circuit, and an energy flow transfer diagram under the condition of high voltage abnormal power failure provided by the invention is shown in figure 4.
In an alternative embodiment, the control block diagram of the energy flow in the solution of the invention is shown in fig. 5, and the basic principle may include: during the running process of the vehicle, when a main drive controller (such as a main driver in fig. 2) detects that the direct-current bus voltage UDC is lower than a certain threshold (for example, 400V), it is determined that the high-voltage power supply is powered off, and at this time, the main drive controller controls a main motor to use a motor as a generator, so that the current of a motor winding flows to a bus support capacitor C to charge the bus support capacitor C; the bus support capacitor is used as a direct-current power supply after stabilizing a certain voltage range, and provides high voltage for the auxiliary steering oil pump controller and the brake air pump controller, so that the steering mechanism and the brake system still continue to work normally, and the purpose of stable and safe parking of the vehicle is achieved.
As shown in fig. 6, the basic principle of the main drive controller controlling the main motor to be converted from the motor to the generator may include: when a main drive controller detects that a high-voltage power supply is cut off, power switching devices Q1, Q3 and Q5 of a three-phase full-bridge inverter are controlled to be in an off state, meanwhile, the power switching devices Q2, Q4 and Q6 are controlled to be in an on state, three-phase windings of a main motor are in short circuit together to form a closed loop, due to the fact that speed exists, the voltage of the main motor terminal (the back electromotive force of the main motor of the new energy automobile is high, and when the speed is high, the voltage of the main motor terminal is high), current is formed in the main motor windings, when the control current reaches a preset value, the power switching devices Q2, Q4 and Q6 are controlled to be in an off state, the current in the main motor windings flows to a bus supporting capacitor C through diodes D1, D3 and D5 of an upper bridge to charge the bus supporting capacitor C, and meanwhile. Therefore, the purpose of reversing the current flowing in the motor winding is achieved, and the main motor works in a generator state. The energy flow of the whole process can be seen in the example shown in fig. 4.
Optionally, the energy flow in the above embodiment is provided from the main motor to the bus support capacitor, and then to the power steering system and the braking system, so as to ensure that the vehicle can be stopped smoothly and safely in the case of sudden high-voltage power failure.
Alternatively, in the process of converting the motor into the generator, the power switching devices Q2, Q4 and Q6 of the three-phase full-bridge inverter can be controlled to be in an off state, and the power switching devices Q1, Q3 and Q5 are controlled to be in an on state, so that the three-phase windings of the main motor are short-circuited to form a closed loop.
Since the processing and functions of the automobile of this embodiment are basically corresponding to the embodiment, principle and example of the device shown in fig. 1, the description of this embodiment is not given in detail, and reference may be made to the related description in the foregoing embodiment, which is not described herein again.
Through a large number of tests, the technical scheme provided by the invention is adopted, and when the high-voltage power supply system of the electric vehicle is normal, the main drive controller, the auxiliary steering oil pump controller and the brake air pump controller adopt a mode of taking electricity from the high-voltage battery. When the high-voltage power supply system is abnormal, the main drive controller is adopted to drive the main motor to work in a generator state, and power is supplied to the auxiliary steering oil pump through the support capacitor, so that the problem that the high-voltage power supply of the steering auxiliary air pump cannot work abnormally is solved under the conditions that the power supply is not increased and the design condition of the motor is improved, and the reliability of the system is improved.
According to an embodiment of the present invention, a power supply control method for an automobile corresponding to the automobile is also provided, as shown in fig. 7, which is a schematic flow chart of an embodiment of the method of the present invention. The power supply control method of the automobile can be applied to power supply control of the electric automobile, and the power supply control method can comprise the following steps: step S110 to step S140.
At step S110, it is determined whether the first power supply source of the automobile is powered off through the control unit.
For example: the control unit can be used for controlling the switch unit to be in a closed state under the condition that the first power supply of the automobile is powered off so as to realize disconnection of power supply connection between the first power supply of the automobile and the power utilization unit of the automobile and control a main motor of the automobile to work in a generator state. The automobile is an automobile to be subjected to power supply control, and particularly an electric automobile to be subjected to power supply control.
Alternatively, the determining whether the first power supply of the automobile is powered off in step S110 may include: the method comprises the steps of obtaining the direct current bus voltage of a first power supply of the automobile, determining whether the direct current bus voltage of the first power supply is lower than a set voltage or not, determining that the first power supply is powered off under the condition that the direct current bus voltage of the first power supply is lower than the set voltage, and determining that the first power supply is not powered off under the condition that the direct current bus voltage of the first power supply is not lower than the set voltage.
For example: as shown in fig. 5, during the operation of the vehicle, when the main drive controller (e.g., the main driver in fig. 2) detects that the dc bus voltage UDC is lower than a certain threshold (e.g., 400V), it determines that the high-voltage power supply is powered off, and at this time, the main drive controller controls the main motor to use the electric motor as a generator, so as to realize that the current of the motor winding flows to the bus support capacitor C to charge the bus support capacitor C; the bus support capacitor is used as a direct-current power supply after stabilizing a certain voltage range, and provides high voltage for the auxiliary steering oil pump controller and the brake air pump controller, so that the steering mechanism and the brake system still continue to work normally, and the purpose of stable and safe parking of the vehicle is achieved.
Therefore, the first power supply source of the automobile is determined to be powered off under the condition that the voltage of the direct current bus of the first power supply source of the automobile is lower than the set voltage, so that the determination mode of whether the first power supply source of the automobile is powered off abnormally is simple and convenient, and the determination result is reliable.
In step S120, if the first power supply is not powered off, the switch unit is controlled to be in an on state to supply power through the first power supply. The switch unit is arranged between a first power supply source of the automobile to be subjected to power supply control and an electric unit of the automobile. That is to say, the switch unit is arranged between a first power supply of an automobile to be subjected to power supply control, such as an electric automobile, and an electricity utilization unit of the automobile, such as an all-in-one controller, and can be used for being in an on state under the condition that the first power supply of the automobile is not powered off so as to realize power supply connection between the first power supply of the automobile and the electricity utilization unit of the automobile, so that the electricity is supplied through the first power supply of the automobile, namely the electricity is supplied to the electricity utilization unit of the automobile through the first power supply of the automobile. The first power supply may be a high-voltage power supply system of an automobile such as an electric automobile. The power utilization unit can be a main driving controller, a steering oil pump controller, a brake air pump controller and a DC/DC module of an automobile. The switching unit may include: and controlling the switch.
For example: the switch unit can be a single-pole double-throw switch or a relay. For example: as shown in fig. 3, under the normal operation condition of the electric vehicle, the relay K1 is in a closed state, the high-voltage battery simultaneously supplies power to the main driver, the oil pump controller and the air pump controller, and the main driver controller controls the main motor to work in a normal state. When the whole vehicle finds that the high voltage is in problem, the relay K1 is switched off to cut off the main loop.
In step S130, if the first power supply is powered off, the switch unit is controlled to be in an off state, and the main motor of the vehicle is controlled to be converted from the motor state to the generator state, and the electric quantity generated by the main motor in the generator state is also controlled to charge the energy storage unit. And, for example: the control unit can be used for controlling the switch unit to be in a closed state under the condition that the first power supply of the automobile is powered off so as to realize disconnection of power supply connection between the first power supply of the automobile and the power utilization unit of the automobile and control a main motor of the automobile to work in a generator state. The automobile is an automobile to be subjected to power supply control, and particularly an electric automobile to be subjected to power supply control.
Alternatively, the controlling of the main motor of the vehicle from the motor state to the generator state in step S130 may include: and controlling a first group of power switching devices in a power switching device module of a three-phase full-bridge inverter in a power control unit of the main motor to be in a turn-off state, and simultaneously controlling a second group of power switching devices in the power switching device module of the three-phase full-bridge inverter to be in a turn-on state, so that a three-phase winding of the main motor is in short circuit to form a closed loop.
The power switching device module of the three-phase full-bridge inverter in the power control unit of the main motor may include: a first set of power switches and a second set of power switches. The first set of power switches may be any set of power switches in the power switch module.
For example: as shown in fig. 6, when the main drive controller detects that the high-voltage power supply is cut off, the power switching devices Q1, Q3 and Q5 of the three-phase full-bridge inverter are controlled to be in an off state, and meanwhile, the power switching devices Q2, Q4 and Q6 are controlled to be in an on state, three-phase windings of the main motor are in short circuit together to form a closed loop. Alternatively, in the process of converting the motor into the generator, the power switching devices Q2, Q4 and Q6 of the three-phase full-bridge inverter can be controlled to be in an off state, and the power switching devices Q1, Q3 and Q5 are controlled to be in an on state, so that the three-phase windings of the main motor are short-circuited to form a closed loop.
Therefore, the three-phase winding of the main motor can be in short circuit to form a closed loop circuit to work in a generator state by controlling the first group of power switching devices in the power switching device module of the three-phase full-bridge inverter in the power control unit of the main motor to be in a turn-off state and controlling the second group of power switching devices to be in a turn-on state, the control mode is simple and convenient, and the control result is reliable.
In step S140, storing, by the energy storage unit, electric energy obtained by power generation of a main motor of the automobile in a state where the main motor is operating in a generator state; and under the condition that the electric quantity generated by the main motor in the state of the generator reaches the set power supply electric quantity, at least supplying power to part of the power utilization units of the automobile, such as an auxiliary steering oil pump controller and a brake air pump controller in the power utilization units of the automobile.
For example: a power supply system under the condition of abnormal power failure of a high-voltage power supply of an electric automobile adopts an IGBT working power supply mode in a main drive controller in a five-in-one controller, solves the problem that the high-voltage power supply of a steering auxiliary air pump can not work abnormally under the condition of not increasing power supplies and improving the design of a motor, namely solves the problem that the motor of the auxiliary steering oil pump can not work when the output of the high-voltage power supply in an electric automobile control system is abnormal; moreover, the system cost and complexity are not increased, and the system reliability is ensured.
Therefore, the normal operation of the power utilization unit of the automobile under the power supply of the first power supply source is kept under the condition that the first power supply source of the automobile is determined not to be powered off; and under the condition that the first power supply source of the automobile is determined to be powered off, the power supply path of the first power supply source is cut off to ensure safe disconnection between the first power supply source and the power utilization unit of the automobile, the main motor of the automobile is controlled to be used as a generator to generate power and store the power through the energy storage unit, and when the electric quantity of the stored power reaches the set power supply electric quantity, part of units in the power utilization unit are powered by the electric quantity of the stored power, so that normal work of the part of units is realized, and the reliability of the system is improved.
Alternatively, the step S140 of controlling the main motor to generate the electric power in the generator state to charge the energy storage unit may include: and under the condition that the electric quantity generated by the main motor in the state of the generator reaches the set charging electric quantity, the second group of power switching devices in the power switching device module of the three-phase full-bridge inverter in the power control unit of the main motor is controlled to be in an off state, so that the current in the three-phase winding of the main motor flows to the energy storage unit through the follow current elements in the first group of power devices to charge the energy storage unit.
For example: as shown in fig. 6, when the control current reaches a predetermined value, the power switches Q2, Q4, and Q6 are controlled to be in an off state, and the current in the main motor winding flows to the bus support capacitor C through the diodes D1, D3, and D5 of the upper bridge to charge the bus support capacitor C, and the voltage across the capacitor is controlled to be stable within a certain range. Therefore, the purpose of reversing the current flowing in the motor winding is achieved, and the main motor works in a generator state.
Therefore, the on-off states of two groups of power switching devices in the power switching devices of the three-phase full-bridge inverter in the power control unit of the main motor are controlled to be interchanged under the condition that the electric quantity generated by the main motor in the state of the generator reaches the set charging electric quantity, so that the current in the three-phase winding of the main motor flows to the energy storage unit through the follow current elements in the first group of power switching devices to charge the energy storage unit, and the electric quantity generated by the main motor is used for conveniently and reliably charging the energy storage element.
Alternatively, the power unit of the automobile may include: the system comprises a main drive controller of the automobile, an auxiliary steering oil pump controller of the automobile and a brake air pump controller of the automobile. Some of the electrical units of the motor vehicle may comprise: an auxiliary steering oil pump controller of an automobile and a brake air pump controller of the automobile.
For example: in fig. 2, a power supply mode of a common direct current capacitor bus is adopted for high voltage of a main drive controller, an auxiliary steering oil pump controller (namely, an oil pump controller in fig. 2) and a brake air pump controller (namely, an air pump controller in fig. 2), and when a high-voltage power supply system of the electric vehicle is normal, the main drive controller, the auxiliary steering oil pump controller and the brake air pump controller adopt a mode of getting power from a high-voltage battery; when the high-voltage power supply system is abnormal, the main drive controller is adopted to drive the main motor to work in a generator state, power is supplied to the auxiliary steering oil pump through the support capacitor, energy flows from the main drive motor to the steering oil pump, and the problem that the auxiliary steering oil pump cannot work when the high-voltage power supply system is abnormal is solved. Through the effective implementation mode that the main drive controller controls the main motor current to flow to the supporting capacitor, the direct-current bus voltage of the five-in-one controller can be controlled to be stabilized within a certain voltage range, a high-voltage power supply is provided for the auxiliary steering oil pump controller, and the operability and the driving safety of a steering wheel in the driving process of a vehicle are guaranteed.
Therefore, under the condition that the first power supply of the automobile is powered off, the main motor is used for generating power to supply power to the auxiliary steering oil pump controller and the brake air pump controller, the problem that the auxiliary steering oil pump motor cannot work due to power failure when the output of the high-voltage power supply is abnormal can be avoided, and the reliability and the safety of the operation of the system are improved.
Optionally, the energy storage unit may include: supporting the capacitor.
For example: as shown in fig. 2, the main drive controller, the auxiliary steering oil pump controller and the brake air pump controller adopt a power supply mode of sharing a direct current capacitor bus at high voltage, and when the high-voltage power supply system of the electric vehicle is normal, the main drive controller, the auxiliary steering oil pump controller and the brake air pump controller take electricity from a high-voltage battery through a relay K1; when the high-voltage power supply system is abnormal, the control system disconnects K1, the main drive controller drives the main motor to work in a generator state, power is supplied to the auxiliary steering oil pump through the support capacitor C1 in a controlled and stable mode, energy flows from the main drive motor to the steering oil pump, and the problem that the auxiliary steering oil pump cannot work when the high-voltage power supply system is abnormal is solved.
Therefore, the supporting capacitor is used as the energy storage unit, the structure is simple, and the safety and the reliability of energy storage can be guaranteed.
Optionally, the control unit is a main drive controller of the automobile. In the case where the control unit is a main drive controller of an automobile, the power consumption unit of the automobile may further include: a DC/DC module. The power supply control method may further include: the DC/DC module and the second power supply are arranged between the first power supply and a main drive controller of the automobile to supply power to the main drive controller of the automobile.
For example: the second power supply may be a low voltage power supply system of the vehicle. The low-voltage power supply system may include: batteries and low voltage systems. The first power supply is connected to a main drive controller (namely a main driver) of the automobile after sequentially passing through the DC/DC module, the storage battery and the low-voltage system.
Therefore, the main driving controller of the automobile is used as the control unit, a control device does not need to be additionally arranged, the structure is simple, and the reliability and timeliness of control can be guaranteed.
Since the processing and functions implemented by the method of the present embodiment substantially correspond to the embodiments, principles and examples of the automobile shown in fig. 2 to fig. 6, the description of the present embodiment is not detailed, and reference may be made to the related descriptions in the foregoing embodiments, which are not repeated herein.
Through a large number of tests, the technical scheme of the embodiment is adopted, and the scheme of the invention adopts a mode of taking electricity from the high-voltage battery by the main driving controller, the auxiliary steering oil pump controller and the brake air pump controller when the high-voltage power supply system of the electric vehicle is normal; when the high-voltage power supply system is abnormal, the main drive controller is adopted to drive the main motor to work in a generator state, and the auxiliary steering oil pump is supplied with power through the support capacitor, so that the reliability of the system is ensured, and the cost and the complexity of the system do not need to be increased.
In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (14)

1. A power supply control device characterized by comprising: the energy storage device comprises a switch unit, a control unit and an energy storage unit; wherein the content of the first and second substances,
the switch unit is arranged between a first power supply source of the automobile and an electric unit of the automobile;
the control unit is used for determining whether a first power supply of the automobile is powered off or not; if the first power supply is not powered off, the switch unit is controlled to be in an on state so as to supply power through the first power supply; if the first power supply is powered off, the control switch unit is in an off state, the main motor of the automobile is controlled to be converted into a generator state from a motor state, and electric quantity obtained by power generation of the main motor in the generator state is controlled to charge the energy storage unit;
and the energy storage unit is used for supplying power to at least part of the power utilization units of the automobile under the condition that the electric quantity generated by the main motor in the state of the generator reaches the set power supply electric quantity.
2. The power supply control device according to claim 1, wherein the control unit determines whether or not the first power supply source of the automobile is powered off, including:
the method comprises the steps of obtaining the direct current bus voltage of a first power supply of the automobile, determining whether the direct current bus voltage of the first power supply is lower than a set voltage or not, determining that the first power supply is powered off under the condition that the direct current bus voltage of the first power supply is lower than the set voltage, and determining that the first power supply is not powered off under the condition that the direct current bus voltage of the first power supply is not lower than the set voltage.
3. The power supply control device according to claim 1, wherein the control unit controls the main motor of the automobile to be switched from the motor state to the generator state, including:
and controlling a first group of power switching devices in a power switching device module of a three-phase full-bridge inverter in a power control unit of the main motor to be in a turn-off state, and simultaneously controlling a second group of power switching devices in the power switching device module of the three-phase full-bridge inverter to be in a turn-on state, so that a three-phase winding of the main motor is in short circuit to form a closed loop.
4. The power supply control device according to claim 3, wherein the control unit controls the main motor to generate power to charge the energy storage unit in the generator state, and includes:
and under the condition that the electric quantity generated by the main motor in the state of the generator reaches the set charging electric quantity, the second group of power switching devices in the power switching device module of the three-phase full-bridge inverter in the power control unit of the main motor is controlled to be in an off state, so that the current in the three-phase winding of the main motor flows to the energy storage unit through the follow current elements in the first group of power devices to charge the energy storage unit.
5. The apparatus of any one of claims 1 to 4, wherein,
an electric unit for a vehicle, comprising: the system comprises a main drive controller of the automobile, an auxiliary steering oil pump controller of the automobile and a brake air pump controller of the automobile; partial unit in a power unit of a motor vehicle, comprising: an auxiliary steering oil pump controller of the automobile and a brake air pump controller of the automobile;
and/or the presence of a gas in the gas,
an energy storage unit comprising: supporting the capacitor.
6. The power supply control device according to claim 5, wherein the control unit is a main drive controller of an automobile;
in the case where the control unit is a main drive controller of an automobile, the power consumption unit of the automobile further includes: a DC/DC module; this power supply control device still includes: a second power supply;
the DC/DC module and the second power supply are arranged between the first power supply and a main drive controller of the automobile and used for supplying power to the main drive controller of the automobile.
7. The power supply control device according to claim 6, wherein the second power supply source includes: batteries and low voltage systems; wherein the content of the first and second substances,
the storage battery supplies power to the low-voltage system; the low-voltage system supplies power to the low-voltage link of each controller of the automobile; and meanwhile, the low-voltage system supplies power to low-voltage equipment on the vehicle.
8. An automobile, comprising: the power supply control device according to any one of claims 1 to 7.
9. A power supply control method of an automobile according to claim 8, characterized by comprising:
determining whether a first power supply of the automobile is powered off or not through a control unit;
if the first power supply is not powered off, the switch unit is controlled to be in an on state so as to supply power through the first power supply; the switch unit is arranged between a first power supply of the automobile to be subjected to power supply control and an electric unit of the automobile;
if the first power supply is powered off, the control switch unit is in an off state, the main motor of the automobile is controlled to be converted into a generator state from a motor state, and electric quantity obtained by power generation of the main motor in the generator state is controlled to charge the energy storage unit; and the number of the first and second groups,
and the energy storage unit is used for supplying power to at least part of the power utilization units of the automobile under the condition that the electric quantity generated by the main motor in the state of the generator reaches the set power supply electric quantity.
10. The power supply control method according to claim 9, wherein determining whether the first power supply of the automobile is powered off includes:
the method comprises the steps of obtaining the direct current bus voltage of a first power supply of the automobile, determining whether the direct current bus voltage of the first power supply is lower than a set voltage or not, determining that the first power supply is powered off under the condition that the direct current bus voltage of the first power supply is lower than the set voltage, and determining that the first power supply is not powered off under the condition that the direct current bus voltage of the first power supply is not lower than the set voltage.
11. The power supply control method according to claim 9, wherein controlling the main motor of the automobile to be switched from the motor state to the generator state includes:
and controlling a first group of power switching devices in a power switching device module of a three-phase full-bridge inverter in a power control unit of the main motor to be in a turn-off state, and simultaneously controlling a second group of power switching devices in the power switching device module of the three-phase full-bridge inverter to be in a turn-on state, so that a three-phase winding of the main motor is in short circuit to form a closed loop.
12. The power supply control method according to claim 11, wherein controlling the main motor to generate power in the generator state to charge the energy storage unit comprises:
and under the condition that the electric quantity generated by the main motor in the state of the generator reaches the set charging electric quantity, the second group of power switching devices in the power switching device module of the three-phase full-bridge inverter in the power control unit of the main motor is controlled to be in an off state, so that the current in the three-phase winding of the main motor flows to the energy storage unit through the follow current elements in the first group of power devices to charge the energy storage unit.
13. The method according to any one of claims 9 to 12, wherein,
an electric unit for a vehicle, comprising: the system comprises a main drive controller of the automobile, an auxiliary steering oil pump controller of the automobile and a brake air pump controller of the automobile; partial unit in a power unit of a motor vehicle, comprising: an auxiliary steering oil pump controller of the automobile and a brake air pump controller of the automobile;
and/or the presence of a gas in the gas,
an energy storage unit comprising: supporting the capacitor.
14. The power supply control method according to claim 13, wherein the control unit is a main drive controller of an automobile;
in the case where the control unit is a main drive controller of an automobile, the power consumption unit of the automobile further includes: a DC/DC module; the power supply control method further comprises the following steps:
and supplying power to a main drive controller of the automobile through the DC/DC module and a second power supply.
CN201911121987.1A 2019-11-15 2019-11-15 Power supply control device, automobile and power supply control method of automobile Pending CN110816274A (en)

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Cited By (4)

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CN111490588A (en) * 2020-04-02 2020-08-04 国网浙江省电力有限公司杭州供电公司 Method for realizing mutual backup of communication power supply and operation power supply of transformer substation
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CN111361517A (en) * 2020-03-23 2020-07-03 安徽安凯汽车股份有限公司 Double-winding motor control inflating and steering two-in-one device for pure electric passenger car
CN113492677A (en) * 2020-04-01 2021-10-12 长城汽车股份有限公司 Electric automobile emergency method and electric automobile
CN113492677B (en) * 2020-04-01 2022-09-13 长城汽车股份有限公司 Electric automobile emergency method and electric automobile
CN111490588A (en) * 2020-04-02 2020-08-04 国网浙江省电力有限公司杭州供电公司 Method for realizing mutual backup of communication power supply and operation power supply of transformer substation
CN112793462A (en) * 2021-01-04 2021-05-14 东风汽车股份有限公司 Rapid discharge system for all-in-one controller of pure electric vehicle

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