CN117284140A - Vehicle battery charge and discharge control method and device, electronic equipment and storage medium - Google Patents

Vehicle battery charge and discharge control method and device, electronic equipment and storage medium Download PDF

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Publication number
CN117284140A
CN117284140A CN202311576910.XA CN202311576910A CN117284140A CN 117284140 A CN117284140 A CN 117284140A CN 202311576910 A CN202311576910 A CN 202311576910A CN 117284140 A CN117284140 A CN 117284140A
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CN
China
Prior art keywords
vehicle
charging
charge
charging circuit
battery
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311576910.XA
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Chinese (zh)
Inventor
肖勇
喻皓
张光臻
刘伟
夏铸亮
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GAC Aion New Energy Automobile Co Ltd
Original Assignee
GAC Aion New Energy Automobile Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GAC Aion New Energy Automobile Co Ltd filed Critical GAC Aion New Energy Automobile Co Ltd
Priority to CN202311576910.XA priority Critical patent/CN117284140A/en
Publication of CN117284140A publication Critical patent/CN117284140A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
    • 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
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30—Constructional details of charging stations
    • B60L53/31—Charging columns specially adapted for electric 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
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/547—Voltage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention relates to the technical field of vehicles. The invention discloses a vehicle battery charge and discharge control method, a device, electronic equipment and a storage medium. The method comprises the following steps: the charging pile electrically connected with the vehicle charging and discharging interface is controlled to charge the vehicle power battery through a direct-connection charging circuit of the vehicle charging and discharging circuit, the vehicle charging and discharging circuit comprises a boosting charging circuit based on a motor system and a direct-connection charging circuit, and the vehicle charging and discharging interface is connected with the vehicle power battery in an on-off mode through the boosting charging circuit and the direct-connection charging circuit which are connected in parallel; and detecting the battery voltage of the vehicle power battery, and controlling the charging pile to charge the vehicle power battery through the boosting charging circuit when the battery voltage is greater than or equal to a preset voltage threshold value. The invention adapts to the voltage change of the battery in the charging process, so that the battery can still continue to be charged when the highest voltage of the charging pile is exceeded, and the battery can be ensured to be full.

Description

Vehicle battery charge and discharge control method and device, electronic equipment and storage medium
Technical Field
The invention relates to the technical field of vehicles, in particular to a vehicle battery charge and discharge control method, a device, electronic equipment and a storage medium.
Background
In order to improve the endurance mileage of the electric automobile and the charging rate requirement of the electric automobile. Batteries of electric vehicles move toward high electric power, high voltage, and high energy density. Improving the charging rate and shortening the charging time is beneficial to improving the use experience of customers.
However, during the charging process of the vehicle, the voltage of the battery changes, and when the voltage of the battery is higher than the voltage of the charging pile, the battery cannot be charged, so that the electric vehicle using the high-voltage battery can be charged when the charging starts because the voltage of the battery is lower than the voltage of the charging pile, but after the charging approaches the voltage of the charging pile, the battery cannot be charged, and the battery cannot be fully charged.
Disclosure of Invention
Accordingly, it is necessary to provide a method, a device, an electronic device and a storage medium for controlling charge and discharge of a vehicle battery, aiming at the technical problem that the prior art cannot adapt to the voltage change of the battery in the charging process.
The invention provides a vehicle battery charge and discharge control method, which comprises the following steps:
the vehicle charging and discharging circuit comprises a boosting charging circuit based on a motor system and the direct-connection charging circuit, wherein the vehicle charging and discharging interface is connected with the vehicle power battery in an on-off mode through the boosting charging circuit and the direct-connection charging circuit which are connected in parallel, the boosting charging circuit comprises a first inductor, a second inductor, a third inductor, a first motor control loop, a second motor control loop and a third motor control loop of the motor system, a first end of the first inductor is electrically connected with the vehicle power battery through the first motor control loop, a first end of the second inductor is electrically connected with the vehicle power battery through the second motor control loop, a first end of the third inductor is electrically connected with the vehicle power battery through the third motor control loop, a second end of the first inductor, a second end of the second inductor and a second end of the third inductor are electrically connected, and the first end of the vehicle charging and discharging interface is electrically connected with the first end of the vehicle power battery;
And detecting the battery voltage of the vehicle power battery, and controlling the charging pile to charge the vehicle power battery through the boosting charging circuit when the battery voltage is greater than or equal to a preset voltage threshold.
Further, the vehicle charging and discharging circuit further comprises an input capacitor which is connected with the boost charging circuit in an on-off mode;
the control of the charging pile to charge the vehicle power battery via the boost charging circuit includes:
pre-charging the input capacitor;
after the input capacitor is precharged, the first motor control loop is controlled to be disconnected, and the second motor control loop and the third motor control loop are controlled to enter a boost charging mode;
the input capacitor is controlled to be electrically connected with the boost charging circuit, the vehicle charge-discharge interface is controlled to be electrically connected with the boost charging circuit and the vehicle power battery, and the vehicle charge-discharge interface is controlled to be disconnected with the direct-connection charging circuit.
Still further, the precharging the input capacitance includes:
and controlling the input capacitor to be electrically connected with the boost charging circuit, and controlling the vehicle charging and discharging interface to be disconnected with the boost charging circuit so as to precharge the input capacitor.
Still further, the controlling the input capacitor to be electrically connected with the boost charging circuit, controlling the vehicle charge-discharge interface, the boost charging circuit and the vehicle power battery to be electrically connected, controlling the vehicle charge-discharge interface to be disconnected with the direct-connection charging circuit, includes:
the input capacitor is controlled to be electrically connected with the boost charging circuit, and the vehicle charge-discharge interface, the boost charging circuit and the vehicle power battery are controlled to be electrically connected;
and after the vehicle charge-discharge interface, the boost charging circuit and the vehicle power battery are electrically connected, the vehicle charge-discharge interface is controlled to be disconnected with the direct-connection charging circuit.
Still further, the vehicle charging and discharging circuit further includes an output capacitor electrically connected to the vehicle power battery, and the control unit is configured to control the charging pile to charge the vehicle power battery via the boost charging circuit, and further includes:
after the charging is completed, the input capacitor is electrically connected with the boost charging circuit, and meanwhile, the electric connection between the vehicle charge-discharge interface and the boost charging circuit is disconnected, and the input capacitor is discharged;
after a first preset time, discharging the output capacitor;
And after a second preset time, disconnecting the input capacitor from the boost charging circuit.
Further, the voltage threshold is the highest voltage of the charging pile minus a preset residual value.
The invention provides a vehicle battery charge and discharge control device, comprising:
the vehicle charging and discharging circuit comprises a boosting charging circuit based on a motor system and the direct-connection charging circuit, the vehicle charging and discharging interface is connected with the vehicle power battery in an on-off mode through the boosting charging circuit and the direct-connection charging circuit which are connected in parallel, the boosting charging circuit comprises a first inductor, a second inductor, a third inductor, a first motor control loop, a second motor control loop and a third motor control loop of a motor system, a first end of the first inductor is electrically connected with the vehicle power battery through the first motor control loop, a first end of the second inductor is electrically connected with the vehicle power battery through the second motor control loop, a first end of the third inductor is electrically connected with the vehicle power battery through the third motor control loop, a second end of the first inductor, a second end of the second inductor and a second end of the third inductor are electrically connected with the vehicle power battery, and the first end of the third inductor is electrically connected with the on-off mode;
And the switching module is used for detecting the battery voltage of the vehicle power battery, and controlling the charging pile to charge the vehicle power battery through the boosting charging circuit when the battery voltage is greater than or equal to a preset voltage threshold value.
The present invention provides an electronic device including:
at least one processor; the method comprises the steps of,
a memory communicatively coupled to at least one of the processors; wherein,
the memory stores instructions executable by at least one of the processors to enable the at least one processor to perform a vehicle battery charge and discharge control method as previously described.
The present invention provides a storage medium storing computer instructions that, when executed by a computer, are operable to perform all the steps of a vehicle battery charge-discharge control method as described above.
The invention provides a vehicle, comprising the vehicle battery charge-discharge control device or the electronic equipment.
When the vehicle starts to charge, the invention adopts direct connection charging, detects the voltage of the battery in the charging process, and switches to the boost charging circuit to charge when the voltage of the battery is larger than the preset voltage threshold value, thereby adapting to the voltage change of the battery in the charging process, ensuring that the battery can still continue to charge when the voltage of the battery exceeds the highest voltage of the charging pile, and ensuring that the battery can be fully charged. Meanwhile, according to the vehicle battery charging and discharging circuit, the single-phase outgoing line of the motor system enables the boosting charging circuit to reduce motor torque fluctuation when the boosting charging circuit works.
Drawings
FIG. 1 is a flowchart illustrating a method for controlling charge and discharge of a vehicle battery according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a method for controlling charge and discharge of a vehicle battery according to another embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of a vehicle battery charging and discharging circuit according to an embodiment of the present invention;
FIG. 4 is a schematic circuit diagram of a vehicle battery charging and discharging circuit according to another embodiment of the present invention;
FIG. 5 is a schematic circuit diagram of a vehicle battery charging and discharging circuit according to another embodiment of the present invention;
FIG. 6 is a schematic charging diagram of a vehicle battery charging and discharging circuit according to an embodiment of the invention;
FIG. 7 is a schematic charging diagram of a vehicle battery charging and discharging circuit according to another embodiment of the present invention;
FIG. 8 is a schematic charging diagram of a vehicle battery charging and discharging circuit according to another embodiment of the present invention;
FIG. 9 is a flowchart illustrating the charge switching operation according to the preferred embodiment of the present invention;
FIG. 10 is a flowchart of the operation of discharging the boosted charge voltage according to the preferred embodiment of the present invention;
FIG. 11 is a schematic diagram of a vehicle battery charge/discharge control device according to an embodiment of the present invention;
fig. 12 is a schematic hardware structure of an electronic device according to the present invention.
Description of the marking
1-a boost charging circuit; 11-a first inductance; 12-a second inductance; 13-a third inductance; 14-a first motor control loop; 141-a first field effect transistor; 142-a second field effect transistor; 15-a second motor control loop; 151-a third field effect transistor; 152-fourth field effect transistor; 16-a third motor control loop; 161-fifth field effect transistor; 162-sixth field effect transistor; 2-a direct-connection charging circuit; 3-vehicle charge-discharge interface; 4-a vehicle power battery; 5-input capacitance; 6-output capacitance; 71-a first switch; 72-a second switch; 73-a third switch; 8-a controller; a 9-filter; 10-charging piles; 110-BMS;120-VCU;130-MCU.
Detailed Description
Specific embodiments of the present invention will be further described below with reference to the accompanying drawings. Wherein like parts are designated by like reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.
Fig. 1 is a flowchart of a method for controlling charge and discharge of a vehicle battery according to an embodiment of the present invention, including:
step S101, a charging pile electrically connected with a vehicle charging and discharging interface is controlled to charge a vehicle power battery through a direct-connection charging circuit of a vehicle charging and discharging circuit, the vehicle charging and discharging circuit comprises a boosting charging circuit based on a motor system and the direct-connection charging circuit, the vehicle charging and discharging interface is electrically connected with the vehicle power battery through the boosting charging circuit and the direct-connection charging circuit which are connected in parallel, the boosting charging circuit comprises a first inductor, a second inductor, a third inductor, a first motor control loop, a second motor control loop and a third motor control loop of a motor system, a first end of the first inductor is electrically connected with the vehicle power battery through the first motor control loop, a first end of the second inductor is electrically connected with the vehicle power battery through the third motor control loop, a second end of the first inductor, a second end of the second inductor and a second end of the third inductor are electrically connected with the vehicle power battery, and the first end of the first inductor is electrically connectable with the first end of the vehicle charging and discharging interface;
Step S102, detecting a battery voltage of the vehicle power battery, and controlling the charging pile to charge the vehicle power battery through the boost charging circuit when the battery voltage is greater than or equal to a preset voltage threshold.
In particular, the present invention may be applied to electronic devices having processing capabilities, such as a battery management system (Battery Management System, BMS), a vehicle controller (Vehicle Control Unit, VCU), a motor controller (MoterController Unit, MCU), and the like.
Specifically, step S101 is first executed during charging, where the charging pile electrically connected to the vehicle charging/discharging interface is controlled to charge the vehicle power battery through the direct-connection charging circuit of the vehicle charging/discharging circuit.
The vehicle charging and discharging circuit comprises a boosting charging circuit based on a motor system and the direct-connection charging circuit, and the vehicle charging and discharging interface is connected with the vehicle power battery in an on-off mode through the boosting charging circuit and the direct-connection charging circuit which are connected in parallel.
Fig. 3 shows a vehicle battery charging and discharging circuit according to an embodiment of the invention, including: a boost charging circuit 1, a direct-connection charging circuit 2, an input capacitor 5 and an output capacitor 6;
The boost charging circuit 1 comprises a first inductor 11, a second inductor 12, a third inductor 13, a first motor control loop 14, a second motor control loop 15 and a third motor control loop 16 of a motor system, wherein a first end of the first inductor 11 is electrically connected with the vehicle power battery 4 through the first motor control loop 14, a first end of the second inductor 12 is electrically connected with the vehicle power battery 4 through the second motor control loop 15, a first end of the third inductor 13 is electrically connected with the vehicle power battery 4 through the third motor control loop 16, a second end of the first inductor 11, a second end of the second inductor 12 and a second end of the third inductor 13 are electrically connected, the vehicle charge-discharge interface 3 is electrically connected with the first end of the first inductor 11 through a second switch 72, a first switch 71, one end of the input capacitor 5 is electrically connected with the first end of the first inductor 11 through the first switch 71, the other end of the input capacitor 6 is grounded, the second end of the output capacitor 6 is electrically connected with the vehicle power battery 4, the other end of the input capacitor is electrically connected with the third switch 73, and the other end of the input capacitor is electrically connected with the vehicle power battery 3.
The first inductor 11, the second inductor 12, and the third inductor 13 are inductance groups of the vehicle motor system. The first motor control loop 14, the second motor control loop 15 and the third motor control loop 16 are motor control loops of a motor system. The first motor control loop 14 includes a first fet 141 and a second fet 142 connected in parallel, the second motor control loop 15 includes a third fet 151 and a fourth fet 152 connected in parallel, and the third motor control loop 16 includes a fifth fet 161 and a sixth fet 162 connected in parallel.
Preferably, the vehicle battery charge-discharge circuit further includes a controller 8 and a filter 9.
Wherein, the controller 8 detects the voltage V at two ends of the input capacitor 5 through a sampling circuit in As the highest voltage of the charging pile, the voltage V at two ends of the output capacitor 6 is detected dc As battery voltage. At the same time, the controller 8 can also detect the three-phase current I passing through the first inductor 11, the second inductor 12 and the third inductor 13 uvw 。
The filter 9 is preferably an electromagnetic compatibility (Electro Magnetic Compatibility, EMC) filter. The filter 9 is disposed between the second ends of the first inductor 11, the second inductor 12, and the third inductor 13 and the vehicle charge-discharge interface 3 for filtering.
Specifically, the circuits shown in fig. 3 and 6 include a direct fast charge mode and a boost fast charge mode:
boost fast charge mode: the first switch 71 and the second switch 72 are closed, and the third switch 73 is opened, so that the charging pile is controlled to charge the vehicle power battery through the boost charging circuit.
Direct fast charge mode: the first switch 71 and the second switch 72 are opened, and the third switch 73 is closed, so that the charging pile is controlled to charge the vehicle power battery through the direct-connection charging circuit.
Preferably, the first switch 71, the second switch 72 are boost relays, and the third switch 73 is a dc fast charging relay.
With the circuit shown in fig. 3, when step S101 is performed to control the charging pile electrically connected to the vehicle charging/discharging interface to charge the vehicle power battery through the direct-connection charging circuit of the vehicle charging/discharging circuit, the first switch 71 and the second switch 72 are opened, and the third switch 73 is closed, so as to control the charging pile to charge the vehicle power battery through the direct-connection charging circuit.
The direction of current flow is from the charging stake to the vehicle power cell as shown in fig. 6.
Compared with a three-phase outgoing line charging and discharging circuit, the vehicle battery charging and discharging circuit has the advantages that the inductance is larger through the single-phase outgoing line of the motor system, so that the motor torque fluctuation can be reduced when the boosting and charging circuit works.
In some embodiments, the method of the present invention may also be applied to a vehicle battery charge-discharge circuit with three-phase outgoing lines as shown in fig. 4 and 5.
Fig. 4 shows a charge and discharge circuit of a vehicle battery according to another embodiment of the present invention, including: a boost charging circuit 1, a direct-connection charging circuit 2, an input capacitor 5 and an output capacitor 6;
the boost charging circuit 1 comprises a first inductor 11, a second inductor 12, a third inductor 13, a first motor control loop 14, a second motor control loop 15 and a third motor control loop 16 of a motor system, wherein a first end of the first inductor 11 is electrically connected with the vehicle power battery 4 through the first motor control loop 14, a first end of the second inductor 12 is electrically connected with the vehicle power battery 4 through the second motor control loop 15, a first end of the third inductor 13 is electrically connected with the vehicle power battery 4 through the third motor control loop 16, a second end of the first inductor 11, a second end of the second inductor 12 and a second end of the third inductor 13 are electrically connected, the vehicle charge-discharge interface 3 is electrically connected with the second end of the first inductor 11 through a second switch 72, a first switch 71, one end of the input capacitor 5 is electrically connected with the second end of the first inductor 11 through the first switch 71, the other end of the input capacitor 6 is electrically connected with the vehicle power battery 4 through the third switch 73, the other end of the input capacitor 5 is electrically connected with the vehicle power battery 4 through the other end of the input capacitor 3, and the other end of the input capacitor is electrically connected with the vehicle power battery 3 through the other end of the vehicle charge-discharge interface 73.
The first inductor 11, the second inductor 12 and the third inductor 13 are inductance groups of a vehicle motor system, namely motor windings. The first motor control loop 14, the second motor control loop 15 and the third motor control loop 16 are motor control loops of a motor system. The first motor control loop 14 includes a first fet 141 and a second fet 142 connected in parallel, the second motor control loop 15 includes a third fet 151 and a fourth fet 152 connected in parallel, and the third motor control loop 16 includes a fifth fet 161 and a sixth fet 162 connected in parallel.
Preferably, the vehicle battery charging and discharging circuit further comprises a controller 8 and a filter 9, the filter 9 preferably being an electromagnetic compatibility (Electro Magnetic Compatibility, EMC) filter.
The circuits shown in fig. 4 and 7 include a direct fast charge mode and a boost fast charge mode:
boost fast charge mode: the first switch 71 and the second switch 72 are closed, the third switch 73 is opened, the whole vehicle and the charging pile are subjected to charging handshake signal interaction, and the motor system is enabled to enter a boosting charging mode, so that the charging pile is controlled to charge the vehicle power battery through the boosting charging circuit.
Direct fast charge mode: the first switch 71 and the second switch 72 are opened, the third switch 73 is closed, and the whole vehicle and the charging pile are subjected to charging handshake signal interaction to realize charging, so that the charging pile is controlled to charge the vehicle power battery through the direct-connection charging circuit.
The direction of current flow is from the charging stake to the vehicle power cell as shown in fig. 7.
For the circuits shown in fig. 4 and 7, when step S101 is executed to control the charging pile electrically connected with the vehicle charging and discharging interface to charge the vehicle power battery through the direct-connection charging circuit of the vehicle charging and discharging circuit, the first switch 71 and the second switch 72 are opened, the third switch 73 is closed, and the charging handshake signal interaction is performed between the whole vehicle and the charging pile to realize charging, so as to control the charging pile to charge the vehicle power battery through the direct-connection charging circuit.
Fig. 5 shows a vehicle battery charging and discharging circuit according to still another embodiment of the present invention, including: a boost charging circuit 1, a direct-connection charging circuit 2, an input capacitor 5 and an output capacitor 6;
the boost charging circuit 1 comprises a first inductor 11, a second inductor 12, a third inductor 13, a first motor control loop 14, a second motor control loop 15 and a third motor control loop 16 of a motor system, wherein a first end of the first inductor 11 is electrically connected with a vehicle power battery 4 through the first motor control loop 14, a first end of the second inductor 12 is electrically connected with the vehicle power battery 4 through the second motor control loop 15, a first end of the third inductor 13 is electrically connected with the vehicle power battery 4 through the third motor control loop 16, a second end of the first inductor 11, a second end of the second inductor 12 and a second end of the third inductor 13 are electrically connected, a vehicle charge-discharge interface 3 is electrically connected with a second end of the first inductor 11 through a first switch 71, meanwhile, a first end of an input capacitor 5 is electrically connected with a second end of the first inductor 11 through the first switch 71, another end of the input capacitor is electrically connected with a third capacitor 6 is electrically connected with a vehicle power battery, another end of the input capacitor is electrically connected with a third capacitor 3, another end of the vehicle charge-discharge interface is electrically connected with a vehicle power battery 3, another end of the vehicle charge-discharge interface is electrically connected with a third capacitor 3 is electrically connected with a vehicle power battery 73, and the other end of the vehicle charge-discharge interface is electrically connected with a vehicle power battery 3.
The first inductor 11, the second inductor 12, and the third inductor 13 are inductance groups of the vehicle motor system. The first motor control loop 14, the second motor control loop 15 and the third motor control loop 16 are motor control loops of a motor system. The first motor control loop 14 includes a first fet 141 and a second fet 142 connected in parallel, the second motor control loop 15 includes a third fet 151 and a fourth fet 152 connected in parallel, and the third motor control loop 16 includes a fifth fet 161 and a sixth fet 162 connected in parallel.
Preferably, the vehicle battery charging and discharging circuit further comprises a controller 8 and a filter 9, the filter 9 preferably being an electromagnetic compatibility (Electro Magnetic Compatibility, EMC) filter.
The circuit shown in fig. 5 and 8 includes a direct fast charge mode and a boost fast charge mode:
boost fast charge mode: the first switch 71 and the second switch 72 are closed, the third switch 73 is opened, the whole vehicle and the charging pile are subjected to charging handshake signal interaction, and the motor system is enabled to enter a boosting charging mode, so that the charging pile is controlled to charge the vehicle power battery through the boosting charging circuit.
Direct fast charge mode: and the second switch 72 is opened, the first switch 71 and the third switch 73 are closed, and the whole vehicle and the charging pile are subjected to charging handshake signal interaction to realize charging, so that the charging pile is controlled to charge the vehicle power battery through the direct-connection charging circuit.
The direction of current flow is from the charging stake to the vehicle power cell as shown in fig. 8.
For the circuits shown in fig. 5 and 8, when step S101 is executed to control the charging pile electrically connected with the vehicle charging and discharging interface to charge the vehicle power battery through the direct-connection charging circuit of the vehicle charging and discharging circuit, the second switch 72 is opened, the first switch 71 and the third switch 73 are closed, and the charging handshake signal interaction is performed between the whole vehicle and the charging pile to realize charging, so as to control the charging pile to charge the vehicle power battery through the direct-connection charging circuit.
And then, executing step S102, detecting the battery voltage of the vehicle power battery, and controlling the charging pile to charge the vehicle power battery through the boost charging circuit when the battery voltage is greater than or equal to a preset voltage threshold.
Specifically, when the battery voltage rises to be greater than or equal to a preset voltage threshold, the original direct-connection charging circuit is disconnected, and the vehicle power battery is charged through the boost charging circuit.
With the circuit shown in fig. 3, when step S102 is performed to control the charging post to charge the vehicle power battery through the boost charging circuit, the first switch 71 and the second switch 72 are closed, and the third switch 73 is opened, so as to control the charging post to charge the vehicle power battery through the boost charging circuit.
For the circuit shown in fig. 4 and 7, when step S102 is executed to control the charging post to charge the vehicle power battery through the boost charging circuit, the first switch 71 and the second switch 72 are closed, the third switch 73 is opened, the whole vehicle and the charging post perform charge handshake signal interaction, and the motor system is caused to enter the boost charging mode, so that the charging post is controlled to charge the vehicle power battery through the boost charging circuit.
For the circuit shown in fig. 5 and 8, when step S102 is executed to control the charging post to charge the vehicle power battery through the boost charging circuit, the first switch 71 and the second switch 72 are closed, the third switch 73 is opened, the whole vehicle and the charging post perform charge handshake signal interaction, and the motor system is caused to enter the boost charging mode, so that the charging post is controlled to charge the vehicle power battery through the boost charging circuit.
When the vehicle starts to charge, the invention adopts direct connection charging, detects the voltage of the battery in the charging process, and switches to the boost charging circuit to charge when the voltage of the battery is larger than the preset voltage threshold value, thereby adapting to the voltage change of the battery in the charging process, ensuring that the battery can still continue to charge when the voltage of the battery exceeds the highest voltage of the charging pile, and ensuring that the battery can be fully charged. Meanwhile, according to the vehicle battery charging and discharging circuit, the single-phase outgoing line of the motor system enables the boosting charging circuit to reduce motor torque fluctuation when the boosting charging circuit works.
Fig. 2 is a flowchart of a method for controlling charge and discharge of a vehicle battery according to another embodiment of the present invention, including:
step S201, a charging pile electrically connected with a vehicle charging and discharging interface is controlled to charge a vehicle power battery through a direct-connection charging circuit of a vehicle charging and discharging circuit, the vehicle charging and discharging circuit comprises a boosting charging circuit based on a motor system and the direct-connection charging circuit, the vehicle charging and discharging interface is electrically connected with the vehicle power battery through the boosting charging circuit and the direct-connection charging circuit which are connected in parallel, the vehicle charging and discharging circuit further comprises an input capacitor electrically connected with the boosting charging circuit and an output capacitor electrically connected with the vehicle power battery, the boosting charging circuit comprises a first inductor, a second inductor, a third inductor, a first motor control loop, a second motor control loop and a third motor control loop of a motor system, a first end of the first inductor is electrically connected with the vehicle power battery through the first motor control loop, a first end of the second inductor is electrically connected with the vehicle power battery through the second motor control loop, a first end of the third inductor is electrically connected with the vehicle power battery through the third motor control loop, and a second end of the first inductor is electrically connected with the first end of the first inductor and the second inductor is electrically connected with the first end of the vehicle power battery.
Step S202, detecting a battery voltage of the vehicle power battery, and when the battery voltage is greater than or equal to a preset voltage threshold, pre-charging the input capacitor.
In one embodiment, the voltage threshold is the highest voltage of the charging pile minus a preset margin value.
In one embodiment, the precharging the input capacitance includes:
and controlling the input capacitor to be electrically connected with the boost charging circuit, and controlling the vehicle charging and discharging interface to be disconnected with the boost charging circuit so as to precharge the input capacitor.
Step S203, after precharging the input capacitor, controlling the first motor control loop to be disconnected, and controlling the second motor control loop and the third motor control loop to enter a boost charging mode.
Step S204, controlling the input capacitor to be electrically connected with the boost charging circuit, controlling the vehicle charge-discharge interface, the boost charging circuit and the vehicle power battery to be electrically connected, and controlling the vehicle charge-discharge interface to be disconnected with the direct-connection charging circuit.
In one embodiment, the controlling the input capacitor to be electrically connected with the boost charging circuit, controlling the vehicle charge-discharge interface, the boost charging circuit and the vehicle power battery to be electrically connected, and controlling the vehicle charge-discharge interface to be disconnected with the direct-connection charging circuit includes:
The input capacitor is controlled to be electrically connected with the boost charging circuit, and the vehicle charge-discharge interface, the boost charging circuit and the vehicle power battery are controlled to be electrically connected;
and after the vehicle charge-discharge interface, the boost charging circuit and the vehicle power battery are electrically connected, the vehicle charge-discharge interface is controlled to be disconnected with the direct-connection charging circuit.
Step S205, after the charging is completed, is to keep the input capacitor electrically connected to the boost charging circuit, and disconnect the electrical connection between the vehicle charge-discharge interface and the boost charging circuit, so as to bleed the input capacitor.
Step S206, after a first preset time, discharging the output capacitor.
Step S207, after a second preset time, the input capacitor is disconnected from the boost charging circuit.
Specifically, when the battery voltage of the vehicle power battery is smaller than the set voltage value at the initial stage of charging, step S201 may be performed to directly charge the vehicle power battery by using the direct-connection charging circuit, then the battery voltage of the vehicle power battery is detected, and when the battery voltage is greater than or equal to the preset voltage threshold, steps S202 to S207 are performed to control the charging pile to charge the vehicle power battery through the boost charging circuit.
The boost charging mode is initiated by the BMS, the VCU controls whole vehicle energy management, the MCU realizes the boost of the highest voltage of the charging pile to charge the power battery, in the process, the BMS performs current and voltage control with the direct current charging pile according to the whole vehicle demand current and voltage sent by the VCU, and the MCU controls the direct current charging port side voltage and the power battery side current according to the request charging current and voltage sent by the VCU. Wherein the MCU is preferably the controller 8 of the vehicle charge-discharge circuit.
Step S202 is executed, where the BMS sends a boost charging request to the VCU, and after receiving the boost charging request, the VCU requests the MCU to enter boost charging precharge, and controls the input capacitor to perform precharge.
In one embodiment, the precharging the input capacitance includes:
and controlling the input capacitor to be electrically connected with the boost charging circuit, and controlling the vehicle charging and discharging interface to be disconnected with the boost charging circuit so as to precharge the input capacitor.
Specifically, the BMS controls the input capacitor to be electrically connected with the boost charging circuit, controls the vehicle charge-discharge interface to be disconnected with the boost charging circuit, and controls the boost charging circuit 1 to precharge the input capacitor by the MCU.
Specifically, for the circuits of fig. 3, 4, and 5, that is, the first switch 71 is closed so that the input capacitor 5 is connected to the vehicle boost charging circuit 1, while the second switch 72 is opened, the boost charging circuit 1 is kept disconnected from the vehicle charge-discharge interface 3, and the input capacitor 5 is precharged by the vehicle power battery 4 by controlling the boost charging circuit 1. The duty ratios of the first motor control loop 14, the second motor control loop 15 and the third motor control loop 16 can be controlled by the MCU in an existing step-down control manner, so that the first motor control loop 14, the second motor control loop 15 and the third motor control loop 16, the first inductor 11, the second inductor 12 and the third inductor 13 form a step-down loop, and precharge of the input capacitor 5 is achieved.
In one embodiment, the voltage threshold is the highest voltage of the charging pile minus a preset margin value.
Specifically, when the battery voltage of the vehicle power battery is close to the highest voltage of the charging pile, the vehicle power battery is switched to the boost charging circuit to be charged. For example, when the battery voltage required to be charged by the BMS exceeds the highest voltage of the charging post and the current battery voltage reaches a condition for switching from the preset requirement to the boost charging, the switching from the direct charge to the boost charging is performed, the condition being that the battery voltage is equal to or greater than the highest voltage of the charging post minus a preset residual value. Wherein the error value is a smaller value.
After the input capacitor is precharged, for example, after a preset time passes, or the input capacitor voltage reaches a preset precharge threshold, step S203 is executed, where the BMS sends a precharge completion request to the VCU, and the VCU requests the MCU to enter a boost charging mode, and the MCU controls the motor system to enter the boost charging mode. Specifically, the MCU controls the first motor control loop to be disconnected, and controls the second motor control loop and the third motor control loop to enter a boost charging mode.
Specifically, for the circuit shown in fig. 3, the vehicle charging and discharging interface is controlled to be electrically connected with the boost charging circuit, and the motor system is controlled to enter the boost charging mode, which specifically includes:
the first switch 71 is controlled to be closed, the second switch 72 is controlled to be closed, and the third switch 73 is controlled to be opened, so that the vehicle charge-discharge interface 3, the boost charging circuit 1 and the vehicle power battery 4 are electrically connected. Meanwhile, the MCU controls the first motor control loop 14 to be disconnected, and controls the duty ratio of the second motor control loop 15 and the third motor control loop 16, so that the second motor control loop 15 and the third motor control loop 16 form a boost loop, and enter a boost charging mode, so that after the current passes through the first inductor 11, the current passes through the second inductor 12 and the third inductor 13, and then enters the second motor control loop 15 and the third motor control loop 16 respectively. More specifically, the first fet 141 and the second fet 142 are kept inactive, and the boosting is completed by controlling the duty ratios of the third fet 151, the fourth fet 152, the fifth fet 161, and the sixth fet 162.
In some embodiments, for the circuits of fig. 4, 5, the MCU controlling the motor system to enter boost charging mode includes: the MCU adopts the existing boost control mode to control the duty ratios of the first motor control loop 14, the second motor control loop 15 and the third motor control loop 16, so that the first motor control loop 14, the second motor control loop 15 and the third motor control loop 16, the first inductor 11, the second inductor 12 and the third inductor 13 form a boost loop.
Then, the BMS executes step S204 to control the input capacitor to be electrically connected with the boost charging circuit, to control the vehicle charge/discharge interface, the boost charging circuit and the vehicle power battery to be electrically connected, and to control the vehicle charge/discharge interface to be disconnected with the direct-connection charging circuit.
Specifically, for the circuits of fig. 3, 4 and 5, the first switch 71 and the second switch 72 are kept closed, so that the input capacitor is electrically connected to the boost charging circuit, the vehicle charge-discharge interface, the boost charging circuit and the vehicle power battery are electrically connected, and at the same time, the third switch 73 is opened to disconnect the vehicle charge-discharge interface and the direct-connection charging circuit.
In one embodiment, the controlling the input capacitor to be electrically connected with the boost charging circuit, controlling the vehicle charge-discharge interface, the boost charging circuit and the vehicle power battery to be electrically connected, and controlling the vehicle charge-discharge interface to be disconnected with the direct-connection charging circuit includes:
the input capacitor is controlled to be electrically connected with the boost charging circuit, and the vehicle charge-discharge interface, the boost charging circuit and the vehicle power battery are controlled to be electrically connected;
and after the vehicle charge-discharge interface, the boost charging circuit and the vehicle power battery are electrically connected, the vehicle charge-discharge interface is controlled to be disconnected with the direct-connection charging circuit.
Specifically, for the circuits of fig. 3, 4, and 5, the first switch 71 and the second switch 72 are controlled to be closed, and then the input capacitor is electrically connected to the boost charging circuit, and the vehicle charge-discharge interface, the boost charging circuit, and the vehicle power battery are electrically connected.
Then, the third switch 73 is turned off again, and the vehicle charge-discharge interface and the direct-connection charging circuit are disconnected.
The embodiment firstly controls the input capacitor to be electrically connected with the boost charging circuit, and controls the vehicle charging and discharging interface, the boost charging circuit and the vehicle power battery to be electrically connected, and then disconnects the vehicle charging and discharging interface from the direct-connection charging circuit, thereby ensuring that the vehicle charging is still continuously carried out in the switching process.
After the charging is completed, execution of step S205 is performed, and the input capacitor is discharged by disconnecting the electrical connection between the vehicle charging/discharging interface and the boost charging circuit while maintaining the electrical connection between the input capacitor and the boost charging circuit.
Specifically, for the circuits of fig. 3, 4 and 5, the first switch 71 is kept closed, so that the input capacitor can be kept electrically connected with the boost charging circuit, meanwhile, the second switch 72 and the third switch 73 are opened, so that the electric connection between the vehicle charging and discharging interface and the boost charging circuit is disconnected, and meanwhile, the MCU controls the motor system to keep the boost charging mode, so that the input capacitor 5 is released.
After a first preset time, for example 1 second, step S206 is performed to control the bleed-off output capacitor 6. Specifically, three-phase current through the motor is output, thereby discharging the output capacitor 6 through the motor windings.
After a second preset time, for example, after 2 seconds has elapsed, step S207 is performed to disconnect the input capacitor from the boost charging circuit. For the circuits of fig. 3, 4, and 5, the first switch 71 is turned off, and the input capacitor can be electrically disconnected from the boost charging circuit.
As shown in fig. 9, which is a flowchart illustrating the charge switching operation of the preferred embodiment of the present invention, including a BMS 110, a VCU 120, and an MCU 130, the MCU may preferably be the controller 8 of the vehicle charge-discharge circuit, the method includes:
step S901, in the whole vehicle charging process, the BMS detects that the voltage is close to the highest voltage of the charging pile, and sends a boost charging request to the VCU;
step S902, the VCU requests a high voltage on the BMS, and requests the MCU to enter boost charging precharge after receiving the BMS boost request, while maintaining the request for the BMS to enter DC charging mode, and the BMS closes the first switch 71 and opens the second switch 72;
step S903, the MCU is controlled according to the target value sent by the VCU, and sends a state jump signal to the VCU;
step S904, after the BMS sends the boost charging request for 5 seconds, the BMS may send an input-output capacitor precharge completion request to the VCU;
step S905, the VCU requests the MCU to enter a boost charging mode;
step S906, the MCU jumps to a boost charging mode and performs dynamic control according to the output voltage and the output current;
step S907, the VCU requests the BMS to enter a boost charging mode;
in step S908, the BMS first closes the second switch 72 and then opens the third switch 73.
According to the embodiment, when the vehicle starts to charge, direct-connection charging is adopted, the battery voltage is detected in the charging process, and when the battery voltage is larger than the preset voltage threshold value, the step-up charging circuit is switched to charge through specific steps, so that the voltage change of the battery in the charging process is adapted, the battery can still be continuously charged when the highest voltage of the charging pile is exceeded, and the battery can be fully charged. Meanwhile, the input capacitor is pre-charged before charging, and is balanced with the voltage of the charging pile, so that larger impact current is avoided. Before power-down, the input capacitor and the output capacitor are sequentially discharged, so that the safety problem caused by human body contact due to voltage is prevented.
As shown in fig. 10, which is a flowchart illustrating the operation of discharging the boosted charge voltage according to the preferred embodiment of the present invention, including the BMS 110, the VCU 120, and the MCU 130, which may preferably be the controller 8 of the vehicle charge-discharge circuit, the method includes:
step S1001, when the power-down condition is met, the VCU limits the load of the whole vehicle and stops working;
step S1002, the VCU keeps requesting the BMS to power down, opens the relay, and keeps closing the first switch 71 when the BMS boost charging process jumps to power down, and opens other switches;
step S1003, after the VCU confirms that the BMS breaks the main loop, requesting the MCU to start discharging the input capacitor 5, requesting the output capacitor 6 to be discharged after 1 second, and discharging the input capacitor 5 by the MCU;
in step S1004, the BMS turns off the first switch 71 after receiving power-down (off) for 2 seconds.
Based on the same inventive concept, fig. 11 is a schematic diagram of a vehicle battery charge and discharge control device according to an embodiment of the present invention, including:
the direct-connection charging module 1101 is configured to control a charging pile electrically connected to a vehicle charging and discharging interface to charge a vehicle power battery through a direct-connection charging circuit of the vehicle charging and discharging circuit, where the vehicle charging and discharging circuit includes a boost charging circuit based on a motor system and the direct-connection charging circuit, the vehicle charging and discharging interface is electrically connected to the vehicle power battery through the boost charging circuit and the direct-connection charging circuit that are connected in parallel, the boost charging circuit includes a first inductor of a motor system, a second inductor, a third inductor, a first motor control loop, a second motor control loop, and a third motor control loop, a first end of the first inductor is electrically connected to the vehicle power battery through the first motor control loop, a first end of the second inductor is electrically connected to the vehicle power battery through the third motor control loop, a second end of the first inductor, a second end of the second inductor, and a second end of the third inductor are electrically connected to the vehicle power battery, and the first end of the third inductor is electrically connectable to the first end of the vehicle charging and discharging interface;
And the switching module 1102 is configured to detect a battery voltage of the vehicle power battery, and when the battery voltage is greater than or equal to a preset voltage threshold, control the charging pile to charge the vehicle power battery through the boost charging circuit.
When the vehicle starts to charge, the invention adopts direct connection charging, detects the voltage of the battery in the charging process, and switches to the boost charging circuit to charge when the voltage of the battery is larger than the preset voltage threshold value, thereby adapting to the voltage change of the battery in the charging process, ensuring that the battery can still continue to charge when the voltage of the battery exceeds the highest voltage of the charging pile, and ensuring that the battery can be fully charged.
In one embodiment, the vehicle charging and discharging circuit further comprises an input capacitor which is connected with the boost charging circuit in an on-off mode;
the control of the charging pile to charge the vehicle power battery via the boost charging circuit includes:
pre-charging the input capacitor;
after the input capacitor is precharged, the first motor control loop is controlled to be disconnected, and the second motor control loop and the third motor control loop are controlled to enter a boost charging mode;
the input capacitor is controlled to be electrically connected with the boost charging circuit, the vehicle charge-discharge interface is controlled to be electrically connected with the boost charging circuit and the vehicle power battery, and the vehicle charge-discharge interface is controlled to be disconnected with the direct-connection charging circuit.
In one embodiment, the precharging the input capacitance includes:
and controlling the input capacitor to be electrically connected with the boost charging circuit, and controlling the vehicle charging and discharging interface to be disconnected with the boost charging circuit so as to precharge the input capacitor.
In one embodiment, the controlling the input capacitor to be electrically connected with the boost charging circuit, controlling the vehicle charge-discharge interface, the boost charging circuit and the vehicle power battery to be electrically connected, and controlling the vehicle charge-discharge interface to be disconnected with the direct-connection charging circuit includes:
the input capacitor is controlled to be electrically connected with the boost charging circuit, and the vehicle charge-discharge interface, the boost charging circuit and the vehicle power battery are controlled to be electrically connected;
and after the vehicle charge-discharge interface, the boost charging circuit and the vehicle power battery are electrically connected, the vehicle charge-discharge interface is controlled to be disconnected with the direct-connection charging circuit.
In one embodiment, the vehicle charging and discharging circuit further includes an output capacitor electrically connected to the vehicle power battery, and the control unit further includes:
After the charging is completed, the input capacitor is electrically connected with the boost charging circuit, and meanwhile, the electric connection between the vehicle charge-discharge interface and the boost charging circuit is disconnected, and the input capacitor is discharged;
after a first preset time, discharging the output capacitor;
and after a second preset time, disconnecting the input capacitor from the boost charging circuit.
In one embodiment, the voltage threshold is the highest voltage of the charging pile minus a preset margin value.
The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.
Fig. 12 is a schematic diagram of a hardware structure of an electronic device according to the present invention, including:
at least one processor 1201; the method comprises the steps of,
a memory 1202 communicatively coupled to at least one of the processors 1201; wherein,
the memory 1202 stores instructions executable by at least one of the processors to enable the at least one processor to perform the vehicle battery charge and discharge control method as previously described.
One processor 1201 is illustrated in fig. 12.
The electronic device may further include: an input device 1203, and a display device 1204.
The processor 1201, the memory 1202, the input device 1203, and the display device 1204 may be connected by a bus or other means, which is illustrated as a bus connection.
The memory 1202 is used as a non-volatile computer readable storage medium for storing a non-volatile software program, a non-volatile computer executable program, and modules, such as program instructions/modules corresponding to the vehicle battery charge/discharge control method in the embodiments of the present application, for example, the method flows shown in fig. 1 and 2. The processor 1201 executes various functional applications and data processing by running nonvolatile software programs, instructions, and modules stored in the memory 1202, that is, implements the vehicle battery charge and discharge control method in the above-described embodiment.
Memory 1202 may include a storage program area that may store an operating system, at least one application program required for functionality, and a storage data area; the storage data area may store data created according to the use of the vehicle battery charge-discharge control method, and the like. In addition, memory 1202 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, memory 1202 optionally includes memory remotely located relative to processor 1201, which may be connected via a network to a device performing the vehicle battery charge and discharge control method. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 1203 may receive input user clicks and generate signal inputs related to user settings and function controls of the vehicle battery charge and discharge control method. The display 1204 may include a display device such as a display screen.
The vehicle battery charge and discharge control method in any of the method embodiments described above is performed when the one or more modules are stored in the memory 1202 and are executed by the one or more processors 1201.
When the vehicle starts to charge, the invention adopts direct connection charging, detects the voltage of the battery in the charging process, and switches to the boost charging circuit to charge when the voltage of the battery is larger than the preset voltage threshold value, thereby adapting to the voltage change of the battery in the charging process, ensuring that the battery can still continue to charge when the voltage of the battery exceeds the highest voltage of the charging pile, and ensuring that the battery can be fully charged. Meanwhile, according to the vehicle battery charging and discharging circuit, the single-phase outgoing line of the motor system enables the boosting charging circuit to reduce motor torque fluctuation when the boosting charging circuit works.
An embodiment of the present invention provides a storage medium storing computer instructions that, when executed by a computer, perform all the steps of a vehicle battery charge-discharge control method as described above.
An embodiment of the present invention provides a vehicle including the vehicle battery charge-discharge control device as described above, or the electronic apparatus as described above. It will be appreciated that the vehicle may also include: a processor, a memory and a computer program. Wherein the computer program is stored in the memory and configured to be executed by the processor to implement the vehicle battery charge and discharge control method provided by the embodiments of the present disclosure. The portions of the processor and the memory that are described in the embodiment shown in fig. 12 are not described herein.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (10)

1. A vehicle battery charge-discharge control method, characterized by comprising:
the vehicle charging and discharging circuit comprises a boosting charging circuit based on a motor system and the direct-connection charging circuit, wherein the vehicle charging and discharging interface is connected with the vehicle power battery in an on-off mode through the boosting charging circuit and the direct-connection charging circuit which are connected in parallel, the boosting charging circuit comprises a first inductor, a second inductor, a third inductor, a first motor control loop, a second motor control loop and a third motor control loop of the motor system, a first end of the first inductor is electrically connected with the vehicle power battery through the first motor control loop, a first end of the second inductor is electrically connected with the vehicle power battery through the second motor control loop, a first end of the third inductor is electrically connected with the vehicle power battery through the third motor control loop, a second end of the first inductor, a second end of the second inductor and a second end of the third inductor are electrically connected, and the first end of the vehicle charging and discharging interface is electrically connected with the first end of the vehicle power battery;
And detecting the battery voltage of the vehicle power battery, and controlling the charging pile to charge the vehicle power battery through the boosting charging circuit when the battery voltage is greater than or equal to a preset voltage threshold.
2. The vehicle battery charge-discharge control method according to claim 1, wherein the vehicle charge-discharge circuit further includes an input capacitor that is on-off connectable to the boost charge circuit;
the control of the charging pile to charge the vehicle power battery via the boost charging circuit includes:
pre-charging the input capacitor;
after the input capacitor is precharged, the first motor control loop is controlled to be disconnected, and the second motor control loop and the third motor control loop are controlled to enter a boost charging mode;
the input capacitor is controlled to be electrically connected with the boost charging circuit, the vehicle charge-discharge interface is controlled to be electrically connected with the boost charging circuit and the vehicle power battery, and the vehicle charge-discharge interface is controlled to be disconnected with the direct-connection charging circuit.
3. The vehicle battery charge-discharge control method according to claim 2, characterized in that the precharging the input capacitance includes:
And controlling the input capacitor to be electrically connected with the boost charging circuit, and controlling the vehicle charging and discharging interface to be disconnected with the boost charging circuit so as to precharge the input capacitor.
4. The vehicle battery charge-discharge control method according to claim 2, wherein the controlling the input capacitance to be electrically connected to the boost charging circuit, controlling the vehicle charge-discharge interface, the boost charging circuit, and the vehicle power battery to be electrically connected, controlling the vehicle charge-discharge interface to be disconnected from the direct-connection charging circuit, comprises:
the input capacitor is controlled to be electrically connected with the boost charging circuit, and the vehicle charge-discharge interface, the boost charging circuit and the vehicle power battery are controlled to be electrically connected;
and after the vehicle charge-discharge interface, the boost charging circuit and the vehicle power battery are electrically connected, the vehicle charge-discharge interface is controlled to be disconnected with the direct-connection charging circuit.
5. The vehicle battery charge-discharge control method according to claim 2, wherein the vehicle charge-discharge circuit further includes an output capacitor electrically connected to the vehicle power battery, the control of the charging stake to charge the vehicle power battery via the boost charging circuit further includes:
After the charging is completed, the input capacitor is electrically connected with the boost charging circuit, and meanwhile, the electric connection between the vehicle charge-discharge interface and the boost charging circuit is disconnected, and the input capacitor is discharged;
after a first preset time, discharging the output capacitor;
and after a second preset time, disconnecting the input capacitor from the boost charging circuit.
6. The vehicle battery charge-discharge control method according to claim 1, wherein the voltage threshold is the highest voltage of the charging pile minus a preset margin value.
7. A vehicle battery charge-discharge control device, characterized by comprising:
the vehicle charging and discharging circuit comprises a boosting charging circuit based on a motor system and the direct-connection charging circuit, the vehicle charging and discharging interface is connected with the vehicle power battery in an on-off mode through the boosting charging circuit and the direct-connection charging circuit which are connected in parallel, the boosting charging circuit comprises a first inductor, a second inductor, a third inductor, a first motor control loop, a second motor control loop and a third motor control loop of a motor system, a first end of the first inductor is electrically connected with the vehicle power battery through the first motor control loop, a first end of the second inductor is electrically connected with the vehicle power battery through the second motor control loop, a first end of the third inductor is electrically connected with the vehicle power battery through the third motor control loop, a second end of the first inductor, a second end of the second inductor and a second end of the third inductor are electrically connected with the vehicle power battery, and the first end of the third inductor is electrically connected with the on-off mode;
And the switching module is used for detecting the battery voltage of the vehicle power battery, and controlling the charging pile to charge the vehicle power battery through the boosting charging circuit when the battery voltage is greater than or equal to a preset voltage threshold value.
8. An electronic device, comprising:
at least one processor; the method comprises the steps of,
a memory communicatively coupled to at least one of the processors; wherein,
the memory stores instructions executable by at least one of the processors to enable the at least one of the processors to perform the vehicle battery charge-discharge control method according to any one of claims 1 to 6.
9. A storage medium storing computer instructions which, when executed by a computer, are adapted to carry out all the steps of the vehicle battery charge-discharge control method according to any one of claims 1 to 6.
10. A vehicle comprising the vehicle battery charge-discharge control device according to claim 7, or the electronic apparatus according to claim 8.
CN202311576910.XA 2023-11-24 2023-11-24 Vehicle battery charge and discharge control method and device, electronic equipment and storage medium Pending CN117284140A (en)

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CN113715647A (en) * 2021-10-14 2021-11-30 蔚来汽车科技(安徽)有限公司 Vehicle charging system and vehicle
CN113928161A (en) * 2021-10-27 2022-01-14 蔚来动力科技(合肥)有限公司 Charging control method and device for vehicle charging system, medium and vehicle
CN114312433A (en) * 2022-02-15 2022-04-12 小米汽车科技有限公司 Auxiliary module, charging assembly, control method and electric vehicle
CN115056662A (en) * 2022-06-23 2022-09-16 重庆长安新能源汽车科技有限公司 Charging system compatible with low-voltage direct-current charging pile, control method and vehicle
CN115503550A (en) * 2022-09-28 2022-12-23 安徽鸿创新能源动力有限公司 Charging control system and method based on driving motor module and automobile
CN115742767A (en) * 2022-12-06 2023-03-07 广州小鹏汽车科技有限公司 Electric vehicle and photovoltaic charging system thereof
CN116278844A (en) * 2023-05-16 2023-06-23 蔚来动力科技(合肥)有限公司 Charging control device, charging control method and power system for battery
CN116533779A (en) * 2023-05-31 2023-08-04 广州小鹏汽车科技有限公司 Control method of charging circuit, electric vehicle, and storage medium
CN116552264A (en) * 2023-05-31 2023-08-08 广州小鹏汽车科技有限公司 Charging circuit control method, charging circuit, electric vehicle, and storage medium

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