CN106864283B - Power supply method and service capacity calculation method for electric mobile charging vehicle - Google Patents

Power supply method and service capacity calculation method for electric mobile charging vehicle Download PDF

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Publication number
CN106864283B
CN106864283B CN201710068132.1A CN201710068132A CN106864283B CN 106864283 B CN106864283 B CN 106864283B CN 201710068132 A CN201710068132 A CN 201710068132A CN 106864283 B CN106864283 B CN 106864283B
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battery
energy
power supply
power
mobile charging
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CN106864283A (en
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何旭
陈炯
马骏
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NIO Co Ltd
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NIO Co Ltd
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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
    • 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
    • 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
    • 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
    • B60L53/10—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 characterised by the energy transfer between the charging station and the vehicle
    • B60L53/14—Conductive energy transfer
    • 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
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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

Abstract

The invention relates to a power supply method of an electric mobile charging vehicle, which is applied to the mobile charging vehicle comprising a power supply system and an energy supplementing power supply system and is used for switching a power supply battery based on a selected working mode; the working mode comprises a range extending mode and an energy increasing mode; the power supply battery is switched to provide electric energy for charging for the external electric vehicle through the power battery of the mobile charging vehicle in the energy increasing mode; and the power supply battery is switched to provide electric energy for the load of the mobile charging vehicle through the energy carrying battery in the range extending mode. The invention further provides a method for calculating the service capacity of the electric mobile charging vehicle. The invention realizes the energy mutual use between the two types of power supply batteries, can freely realize the balance setting between the service electric quantity and the service radius, and improves the flexibility of the service capacity configuration of the mobile charging vehicle.

Description

Power supply method and service capacity calculation method for electric mobile charging vehicle
Technical Field
The invention belongs to the field of electric automobile charging, and particularly relates to a power supply method and a service capacity calculation method for an electric mobile charging vehicle.
Background
At present, pure electric vehicles and plug-in hybrid electric vehicles are rapidly being industrialized, and thus upright type charging piles and wall-mounted charging devices are becoming popular, but due to the fixity of their positions, the fixed-point charging requirements of vehicles can only be met.
In real life, the electric vehicle often cannot run continuously because the electric vehicle does not reach the charging station and the electric energy stored in the power battery is exhausted during running. If the power is exhausted before reaching the charging station, the trailer is typically called upon to pull the electric vehicle to the charging station, which is costly and inconvenient, and the pulling process may also cause damage to the electric vehicle.
In order to solve the problem that the electric vehicle cannot move when the electric vehicle does not reach a charging station and the electric energy is exhausted, a movable charging vehicle is designed, a large number of charging batteries are loaded in a vehicle body, and a power distribution system and a charging gun are configured to form a movable energy supplementing power supply system, so that emergency charging of the electric vehicle without electric power is realized. The energy supplementing power supply system comprises an energy carrying battery, an energy carrying battery high-voltage power distribution system, an energy supplementing port for charging the energy carrying battery and a charging gun for charging the electric vehicle; when the energy-carrying battery is charged, an external power supply charges the energy-carrying battery through an energy supplementing port through an energy-carrying battery high-voltage power distribution system; when the electric vehicle is charged, the energy-carrying battery charges the electric vehicle through the charging gun through the energy-carrying battery high-voltage power distribution system.
However, due to the limitation of the load capacity of the mobile charging vehicle, the capacity of the battery loaded for the charging service is limited, which greatly limits the service capability of the mobile charging vehicle.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, in order to further increase the available electric quantity on the basis of the existing mobile charging vehicle, in one aspect of the present invention, a power supply method for an electric mobile charging vehicle is provided, which is applied to a mobile charging vehicle comprising a power supply system and an energy supplementing power supply system, wherein the power supply system comprises a power battery and a power battery high-voltage distribution system, and the energy supplementing power supply system comprises an energy carrying battery and an energy carrying battery high-voltage distribution system, and is characterized in that the power supply battery is switched based on a selected working mode;
the power supply battery comprises a power battery and an energy carrying battery;
the working mode comprises a range extending mode and an energy increasing mode;
the switching of the power supply battery comprises the following steps: the power supply battery is switched to provide electric energy for charging for the external electric vehicle through the power battery of the mobile charging vehicle in the energy increasing mode; and the power supply battery is switched to provide electric energy for the load of the mobile charging vehicle through the energy carrying battery in the range extending mode.
Preferably, the switching of the power supply battery based on the selected operation mode includes:
selecting a working mode, and switching the power supply battery according to a switching method of the power supply battery in the selected working mode when the residual capacity of the power supply battery meets a set switching condition;
when the selected working mode is the range extending mode, the set switching condition is that the residual electric quantity of the power battery is smaller than a first set threshold value; when the selected working mode is the energy increasing mode, the set switching condition is that the residual capacity of the energy carrying battery is smaller than a second set threshold value, and the residual capacity of the power battery is larger than a third set threshold value.
Preferably, in the energy increasing mode, the power battery provides electric energy for charging for the external electric vehicle through the energy carrying battery high-voltage power distribution system.
Preferably, in the energy increasing mode, the power battery sequentially passes through a power battery high-voltage distribution system with a DC/DC converter and an energy-carrying battery high-voltage distribution system to provide electric energy for charging an external electric vehicle.
Preferably, the power supply circuit for providing charging electric energy for the external electric vehicle by the power battery is built by controlling the switch circuits K1, K2, K3, K4, K5 and K6; the system comprises a power battery high-voltage distribution system, a charging gun, a power battery high-voltage distribution system, a K1, a K2, a K5, a K6 and a power battery, wherein the K1 is arranged between the power battery high-voltage distribution system and a first power interface, the K2 is arranged between the power battery high-voltage distribution system and the charging gun, the K3 is arranged between the power battery and the power battery high-voltage distribution system, the K4 is arranged between the power battery high-voltage distribution system and a second power interface, the K5 is arranged at a load power supply port of a mobile charging vehicle;
in the energizing mode, the following steps are executed:
electrically connecting the first power interface and the second power interface;
and controlling K1, K2, K4 and K6 to be closed, and K3 and K5 to disconnect power supply lines for building power batteries to provide charging electric energy for external electric vehicles.
Preferably, the first power supply interface and the second power supply interface are connected by a line with a switching circuit K7.
Preferably, the switch circuits K1, K2, K3, K4, K5, K6, K7 are electromagnetic relays; the opening and closing states of K1, K2, K3, K4, K5, K6 and K7 are controlled by a single chip microcomputer.
Preferably, in the extended range mode, the energy-carrying battery provides electric energy for the mobile charging vehicle load through a power battery high-voltage distribution system.
Preferably, in the range extending mode, the energy carrying battery sequentially passes through the energy carrying battery high-voltage power distribution system and the power battery high-voltage power distribution system to provide electric energy for the load of the mobile charging vehicle.
Preferably, a power supply path for providing electric energy for the mobile charging vehicle load by the energy-carrying battery is established by controlling the switch circuits K1, K2, K3, K4, K5 and K6; the system comprises a power battery high-voltage distribution system, a charging gun, a power battery high-voltage distribution system, a K1, a K2, a K5, a K6 and a power battery, wherein the K1 is arranged between the power battery high-voltage distribution system and a first power interface, the K2 is arranged between the power battery high-voltage distribution system and the charging gun, the K3 is arranged between the power battery and the power battery high-voltage distribution system, the K4 is arranged between the power battery high-voltage distribution system and a second power interface, the K5 is arranged at a load power supply port of a mobile charging vehicle;
the range extending mode comprises the following steps:
electrically connecting the first power interface and the second power interface;
and controlling K1, K3, K4 and K5 to be closed and K6 and K2 to be opened, and building a power supply path for providing electric energy for the mobile charging vehicle load by the energy-carrying battery.
Preferably, the first power supply interface and the second power supply interface are connected by a line with a switching circuit K7.
Preferably, the switch circuits K1, K2, K3, K4, K5, K6, K7 are electromagnetic relays; the opening and closing states of K1, K2, K3, K4, K5, K6 and K7 are controlled by a single chip microcomputer.
On the other hand, the invention provides a method for calculating the service capacity of the mobile charging vehicle, which is based on the power supply method of the electric mobile charging vehicle and carries out the calculation of the service capacity according to the selected working mode;
the working mode comprises a range extending mode and an energy increasing mode;
the calculation of the service capacity comprises the calculation of the range-extending mode service capacity and the calculation of the energy-increasing mode service capacity;
the service capacity comprises the driving range of the mobile charging vehicle and the charging capacity of the available electric vehicle;
preferably, the calculation of the service capability of the energy-added mode includes: calculating the available running electric quantity of the mobile charging vehicle in the energy carrying battery and the power battery according to the electric quantity required by the charging service of the electric vehicle in the current service period, and calculating the available running mileage of the mobile charging vehicle based on the calculated available running electric quantity of the mobile charging vehicle;
the electric quantity required by the electric vehicle charging service in the energy increasing mode is larger than the electric quantity of the energy carrying battery;
the service period is the process from full charge starting to recharging of the mobile charging vehicle.
Preferably, the calculating of the extended range mode service capability includes: calculating the electric quantity required by the mobile charging vehicle in the energy carrying battery and the power battery for running the mobile charging vehicle according to the running mileage required by the mobile charging vehicle in the current service period, and calculating the available electric vehicle charging electric quantity based on the calculated electric quantity required by the mobile charging vehicle for running;
the electric quantity required by the running of the mobile charging vehicle in the range extending mode is greater than the electric quantity of the power battery;
the service period is the process from full charge starting to recharging of the mobile charging vehicle.
Preferably, the service capability further comprises a mobile charging cart service radius; and the service radius of the mobile charging vehicle is calculated and obtained according to the driving mileage of the mobile charging vehicle.
Preferably, the working modes further comprise a stand-alone mode;
the calculation of service capabilities further comprises a calculation of independent mode service capabilities;
the calculation of the independent mode service capability comprises the following steps: calculating the driving range of the mobile charging vehicle service in the current service period according to the electric quantity of the power battery, and calculating the charging electric quantity of the electric vehicle available for the mobile charging vehicle service in the current service period according to the electric quantity of the energy-carrying battery;
the service period is the process from full charge starting to recharging of the mobile charging vehicle.
The invention realizes the energy mutual use between the two types of power supply batteries by switching the functions of the power battery and the energy carrying battery of the mobile charging vehicle, can increase different service capacities under specific conditions, such as the charging capacity of an available electric vehicle or the service radius of the mobile charging vehicle, can diversify the service capacities of the same type of mobile charging vehicle, can freely realize the balance setting between the service capacity and the service radius, and improves the flexibility of the service capacity configuration of the mobile charging vehicle.
Scheme 1, a power supply method for an electric mobile charging vehicle, which is applied to a mobile charging vehicle comprising a power supply system and an energy supplementing power supply system, wherein the power supply system comprises a power battery and a power battery high-voltage power distribution system, and the energy supplementing power supply system comprises an energy carrying battery and an energy carrying battery high-voltage power distribution system, and is characterized in that the power supply battery is switched based on a selected working mode;
the power supply battery comprises a power battery and an energy carrying battery;
the working mode comprises a range extending mode and an energy increasing mode;
the switching of the power supply battery comprises the following steps: the power supply battery is switched to provide electric energy for charging for the external electric vehicle through the power battery of the mobile charging vehicle in the energy increasing mode; and the power supply battery is switched to provide electric energy for the load of the mobile charging vehicle through the energy carrying battery in the range extending mode.
The power supply method according to claim 1 or 2, wherein the switching of the power supply battery based on the selected operation mode includes:
selecting a working mode, and switching the power supply battery according to a switching method of the power supply battery in the selected working mode when the residual capacity of the power supply battery meets a set switching condition;
when the selected working mode is the range extending mode, the set switching condition is that the residual electric quantity of the power battery is smaller than a first set threshold value; when the selected working mode is the energy increasing mode, the set switching condition is that the residual capacity of the energy carrying battery is smaller than a second set threshold value, and the residual capacity of the power battery is larger than a third set threshold value.
Scheme 3, the power supply method according to scheme 1 or 2, characterized in that in the energization mode, the power battery provides electric energy for charging an external electric vehicle through an energy-carrying battery high-voltage power distribution system.
Scheme 4 and the power supply method according to scheme 3, wherein in the energy increasing mode, the power battery sequentially passes through a power battery high-voltage distribution system with a DC/DC converter and an energy-carrying battery high-voltage distribution system to provide electric energy for charging an external electric vehicle.
Scheme 5 and the power supply method according to scheme 4 are characterized in that a power supply path for providing charging electric energy for an external electric vehicle by a power battery is built by controlling switch circuits K1, K2, K3, K4, K5 and K6; the system comprises a power battery high-voltage distribution system, a charging gun, a power battery high-voltage distribution system, a K1, a K2, a K5, a K6 and a power battery, wherein the K1 is arranged between the power battery high-voltage distribution system and a first power interface, the K2 is arranged between the power battery high-voltage distribution system and the charging gun, the K3 is arranged between the power battery and the power battery high-voltage distribution system, the K4 is arranged between the power battery high-voltage distribution system and a second power interface, the K5 is arranged at a load power supply port of a mobile charging vehicle;
in the energizing mode, the following steps are executed:
electrically connecting the first power interface and the second power interface;
and controlling K1, K2, K4 and K6 to be closed, and K3 and K5 to disconnect power supply lines for building power batteries to provide charging electric energy for external electric vehicles.
The power supply method according to claim 6 or 5, wherein the first power supply interface and the second power supply interface are connected by a line having a switch circuit K7.
Scheme 7, the power supply method of scheme 6, characterized in that, the switch circuit K1, K2, K3, K4, K5, K6, K7 are electromagnetic relays; the opening and closing states of K1, K2, K3, K4, K5, K6 and K7 are controlled by a single chip microcomputer.
The power supply method according to the claim 1 or 2, or the claim 8, wherein in the range extended mode, the energy-carrying battery supplies electric energy to the mobile charging vehicle load through a power battery high-voltage distribution system.
The power supply method according to the claim 9 and the claim 8 is characterized in that in the range extending mode, the energy-carrying battery sequentially passes through the energy-carrying battery high-voltage power distribution system and the power battery high-voltage power distribution system to provide electric energy for the load of the mobile charging vehicle.
Scheme 10 and the power supply method according to scheme 9 are characterized in that a power supply path for providing electric energy for a load of the mobile charging vehicle by the energy-carrying battery is established by controlling the switch circuits K1, K2, K3, K4, K5 and K6; the system comprises a power battery high-voltage distribution system, a charging gun, a power battery high-voltage distribution system, a K1, a K2, a K5, a K6 and a power battery, wherein the K1 is arranged between the power battery high-voltage distribution system and a first power interface, the K2 is arranged between the power battery high-voltage distribution system and the charging gun, the K3 is arranged between the power battery and the power battery high-voltage distribution system, the K4 is arranged between the power battery high-voltage distribution system and a second power interface, the K5 is arranged at a load power supply port of a mobile charging vehicle;
the range extending mode comprises the following steps:
electrically connecting the first power interface and the second power interface;
and controlling K1, K3, K4 and K5 to be closed and K6 and K2 to be opened, and building a power supply path for providing electric energy for the mobile charging vehicle load by the energy-carrying battery.
The power supply method according to claim 11 or 10, wherein the first power supply interface and the second power supply interface are connected by a line having a switch circuit K7.
The power supply method according to claim 12 or 11, wherein the switching circuits K1, K2, K3, K4, K5, K6, and K7 are electromagnetic relays; the opening and closing states of K1, K2, K3, K4, K5, K6 and K7 are controlled by a single chip microcomputer.
Scheme 13, a method for calculating service capacity of an electric mobile charging vehicle, characterized in that based on the method for supplying power to an electric mobile charging vehicle according to any one of schemes 1 to 10, the service capacity is calculated according to the selected working mode;
the working mode comprises a range extending mode and an energy increasing mode;
the calculation of the service capacity comprises the calculation of the range-extending mode service capacity and the calculation of the energy-increasing mode service capacity;
the service capabilities comprise the driving range of the mobile charging vehicle and the charging capacity of the available electric vehicle.
The method according to claim 14 or 13, wherein the calculating of the service capability in the energy-added mode includes: calculating the available running electric quantity of the mobile charging vehicle in the energy carrying battery and the power battery according to the electric quantity required by the charging service of the electric vehicle in the current service period, and calculating the available running mileage of the mobile charging vehicle based on the calculated available running electric quantity of the mobile charging vehicle;
setting the electric quantity required by the charging service of the electric vehicle to be larger than the electric quantity of the energy-carrying battery in the energy increasing mode;
the service period is the process from full charge starting to recharging of the mobile charging vehicle.
The method according to claim 15 or 14, wherein the calculating of the service capability in the range-extended mode includes: calculating the electric quantity required by the mobile charging vehicle in the energy carrying battery and the power battery for running the mobile charging vehicle according to the running mileage required by the mobile charging vehicle in the current service period, and calculating the available electric vehicle charging electric quantity based on the calculated electric quantity required by the mobile charging vehicle for running;
the electric quantity required by the running of the mobile charging vehicle is set to be larger than the electric quantity of the power battery in the range extending mode;
the service period is the process from full charge starting to recharging of the mobile charging vehicle.
Scheme 16, the method according to any of claims 13 to 15, wherein the service capability further comprises a mobile charging car service radius; and the service radius of the mobile charging vehicle is calculated and obtained according to the driving mileage of the mobile charging vehicle.
Scheme 17, the calculation method according to any one of schemes 13 to 15, wherein the working modes further include an independent mode;
the calculation of service capabilities further comprises a calculation of independent mode service capabilities;
the calculation of the independent mode service capability comprises the following steps: calculating the driving range of the mobile charging vehicle service in the current service period according to the electric quantity of the power battery, and calculating the charging electric quantity of the electric vehicle available for the mobile charging vehicle service in the current service period according to the electric quantity of the energy-carrying battery;
the service period is the process from full charge starting to recharging of the mobile charging vehicle.
Drawings
Fig. 1 is a schematic frame diagram of an external power supply system of an electric mobile charging car according to the present invention;
fig. 2 is a schematic diagram of an external power supply system module of an electric mobile charging car with a switching function according to the present invention.
FIG. 3 is a schematic diagram of an exemplary service mode and service capabilities of the present invention.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
The method is realized based on the change of the connection relationship of each part in the power supply system of the power battery and the energy-carrying battery of the mobile charging vehicle, and the constitution of the palace system corresponding to the method is firstly described, and then the method is explained in detail.
Based on fig. 1 and fig. 2, a comparison is made between the power supply system of the electric mobile charging vehicle according to the present invention and the power supply system of the conventional mobile charging vehicle. The energy supplementing power supply system 11 of the existing mobile charging vehicle comprises an energy carrying battery 113, an energy carrying battery high-voltage power distribution system 112, a first power interface 111 (i.e. an energy supplementing port) for charging the energy carrying battery, and a charging gun 114 for charging the electric vehicle 20; when the energy-carrying battery is charged, an external power supply charges the energy-carrying battery 113 through the energy-carrying battery high-voltage power distribution system 112 through the first power interface 111; when the electric vehicle 20 is charged, the energy-carrying battery 113 charges the electric vehicle 20 through the charging gun 114 via the energy-carrying battery high-voltage distribution system 112.
The power supply system 10 of the electric mobile charging vehicle corresponding to the method of the invention, as shown in fig. 1, comprises an energy supplementing power supply system 11 for storing electric energy and charging an electric vehicle 20, and further comprises a power supply system 12 for storing electric energy and supplying power to the mobile charging vehicle.
As shown in fig. 2, the energy supplementing power supply system 11 includes an energy carrying battery 113, an energy carrying battery high voltage distribution system 112, a first power interface 111, and a charging gun 114. The power supply system 12 comprises a power battery 123, a power battery high-voltage distribution system 122 and a second power interface 121; the power battery high voltage distribution system 122 is configured to charge and discharge the power battery 123 and to deliver the power of the power battery 123 to the mobile charging cart load 30; the second power interface 121 is a charge/discharge interface.
In order to utilize the electric energy in the power supply system, the power supply system 12 and the complementary power supply system 11 may be provided independently, for example, the power supply system 12 is provided with an independent charging gun 114 device, and the electric vehicle 20 may be independently charged. However, from a better system configuration and the realizability of the energy supply of the energy-carrying battery 113 to the mobile charging vehicle, it is preferable that the power supply system 12 is also connected to the first power interface 111 through a power line, so that the electric energy in the power supply system 12 can be output through the complementary power supply system 11, and the electric energy in the complementary power supply system 11 can be output through the power supply system 12 for the mobile charging vehicle load 30 to use.
The power battery high-voltage power distribution system 122 comprises a power battery bidirectional DC/DC converter which can be used for charging and discharging a power battery 123; the power battery bidirectional DC/DC converter is connected to the power battery 123 and the second power interface 121, respectively. The energy-carrying battery high-voltage distribution system 112 comprises an energy-carrying battery bidirectional DC/DC converter which can be used for charging and discharging the energy-carrying battery 113; the energy-carrying battery bidirectional DC/DC converter is connected to the energy-carrying battery 113 and the first power interface 111, respectively.
The charging of the power battery 123 and the transmission of the electric energy of the power battery 123 to the complementary energy power supply system 11 via the power line are realized by adopting a power battery bidirectional DC/DC converter; the charging of the energy-carrying battery 113 and the transmission of the electric energy of the energy-carrying battery 113 to the power supply system 12 via the power line are realized by adopting an energy-carrying battery bidirectional DC/DC converter.
The bidirectional DC/DC converter is only used to simplify the system, and is not designed to be used only for the purpose of charging the battery with an external power source through the same external interface and supplying power to the outside from the battery.
In order to better realize the switching of the power supply modes of the energy supplementing power supply system 11 and the power supply system 12, a power supply management module is further arranged and used for switching the power supply battery based on the selected working mode.
In order to realize the switching of the power supply modes, as shown in fig. 2, the energy supplementing power supply system 11 and the power supply system 12 of the present embodiment are provided with switch circuits K1, K2, K3, K4, K5, and K6 controlled by a power supply management module, wherein K1 is disposed between the high voltage distribution system 112 of the energy loading battery and the first power interface 111, K2 is disposed between the high voltage distribution system 112 of the energy loading battery and the charging gun 114, K3 is disposed between the high voltage distribution system 112 of the energy loading battery 113, K4 is disposed between the high voltage distribution system 122 of the power battery and the second power interface 121, K5 is disposed at a power supply port of the mobile charging vehicle load 30 of the high voltage distribution system 122 of the power battery, and K6 is disposed between the high voltage distribution system 122 of the power battery and the power battery 123.
The first power supply interface 111 and the second power supply interface 121 are electrically connected, and may be connected by a line having a switch circuit K7.
The switch circuits K1, K2, K3, K4, K5, K6 and K7 are electromagnetic relays; the control end of the electromagnetic relay is connected with the control output end of the power supply management module, and the opening and closing states of K1, K2, K3, K4, K5, K6 and K7 are controlled through the single chip microcomputer.
Based on the above description of the power supply system of the mobile charging car, the method of the present invention will be described in detail.
The invention discloses a power supply method of an electric mobile charging vehicle, which is applied to the mobile charging vehicle comprising a power supply system and an energy supplementing power supply system, wherein the power supply system comprises a power battery 123 and a power battery high-voltage power distribution system 122, the energy supplementing power supply system comprises an energy carrying battery 113 and an energy carrying battery high-voltage power distribution system 112, and the power supply batteries are switched based on a selected working mode.
The working mode comprises a range extending mode and an energy increasing mode.
The switching of the power supply battery comprises the following steps: the power supply battery in the energy increasing mode is switched to supply electric energy for charging for the external electric vehicle 20 through the power battery 123 of the mobile charging vehicle; in the extended range mode, the power supply battery is switched to supply electric energy to the mobile charging vehicle load 30 through the energy carrying battery 113.
The optimization scheme for switching the power supply battery is as follows: and selecting a working mode, and switching the power supply battery according to the switching method of the power supply battery in the selected working mode when the residual capacity of the power supply battery meets the set switching condition.
When the selected working mode is the range extending mode, the set switching condition is that the residual capacity of the power battery 123 is smaller than a first set threshold; when the selected working mode is the energy increasing mode, the set switching conditions are that the residual capacity of the energy carrying battery 113 is less than a second set threshold, and the residual capacity of the power battery 123 is greater than a third set threshold.
In combination with the structure of the power supply system, in the energy increasing mode, the power battery 123 sequentially passes through the power battery high-voltage distribution system 122 with the DC/DC converter and the energy-carrying battery high-voltage distribution system 112 to provide electric energy for charging the external electric vehicle 20; in the range extending mode, the energy-carrying battery 113 sequentially passes through the energy-carrying battery high-voltage distribution system 112 and the power battery high-voltage distribution system 122 to provide electric energy for the mobile charging vehicle load 30.
In the existing mobile charging vehicle, DC/DC converters for charging batteries are disposed in the high-voltage power distribution system 112 of the energy-carrying battery and the high-voltage power distribution system 122 of the power battery, and in order to realize charging of the power battery and the energy-carrying battery by an external power source, external charging of the power battery in different working modes, and power supply of the energy-carrying battery to a load of the mobile charging vehicle, a set of converters may be respectively disposed in the high-voltage power distribution system 112 of the energy-carrying battery and the high-voltage power distribution system 122 of the power battery, or the converters in the high-voltage power distribution system 112 of the energy-carrying battery and the high-voltage power distribution system 122 of the power battery may be set as bidirectional DC/DC converters.
In combination with the structure of the power supply system, the power supply path for providing charging electric energy for the external electric vehicle 20 by the power battery 123 can be established by controlling the switch circuits K1, K2, K3, K4, K5, K6 and K7 based on the power supply management module.
The method comprises the following steps of (1) building a power supply path in an energy increasing mode: electrically connecting the first power interface 111 and the second power interface 121; and controlling K1, K2, K4 and K6 to be closed and K3 and K5 to be opened, and constructing a power supply line for providing charging electric energy for the external electric vehicle 20 by the power battery 123.
The construction of the power supply path in the range extending mode comprises the following steps: electrically connecting the first power interface 111 and the second power interface 121; and controlling K1, K3, K4 and K5 to be closed and K6 and K2 to be opened, and establishing a power supply path for supplying electric energy to the mobile charging vehicle load 30 by the energy-carrying battery 113.
Based on the power supply method of the electric mobile charging vehicle, the invention also provides a method for calculating the service capacity of the electric mobile charging vehicle, which comprises the following steps: and calculating the service capability according to the selected working mode. The working mode comprises a range extending mode and an energy increasing mode; the calculation of the service capacity comprises the calculation of the range-extending mode service capacity and the calculation of the energy-increasing mode service capacity; the service capability comprises the driving range of the mobile charging vehicle and the charging capacity available for the external electric vehicle.
In order to further improve the availability of the service capacity calculation method, the service capacity also comprises the service radius of the mobile charging car; the service radius of the mobile charging vehicle is calculated and obtained according to the driving distance of the mobile charging vehicle.
In order to further improve the service capability calculation method, the working mode also comprises an independent mode; the calculation of service capabilities also includes the calculation of standalone mode service capabilities.
The calculation of each service capability is described in detail as follows:
the calculation of the service capability of the energy-increasing mode comprises the following steps: and calculating the available running electric quantity of the mobile charging vehicle in the energy carrying battery 113 and the power battery 123 according to the electric quantity required by the charging service of the electric vehicle 20 in the current service period, and calculating the available running distance of the mobile charging vehicle based on the calculated available running electric quantity of the mobile charging vehicle. In the power-up mode, the electric quantity required for the charging service of the electric vehicle 20 is set to be greater than the electric quantity of the energy-carrying battery 113.
Calculating the service capacity of the range-extended mode, comprising: the amount of power required by the mobile charging vehicle for traveling in the energy-carrying battery 113 and the power battery 123 is calculated according to the traveling distance required for the mobile charging vehicle to travel in the current service period, and the available electric vehicle charging amount is calculated based on the calculated amount of power required by the mobile charging vehicle for traveling. And in the range extending mode, the electric quantity required by the running of the mobile charging vehicle is set to be larger than the electric quantity of the power battery 123.
Computing independent mode service capabilities, comprising: the driving range of the mobile charging vehicle service in the current service period is calculated according to the electric quantity of the power battery 123, and the charging electric quantity of the electric vehicle available for the mobile charging vehicle service in the current service period is calculated according to the electric quantity of the energy-carrying battery 113.
The service cycle is the process from full charge to recharge of the mobile charging vehicle.
In connection with the above description of the power supply method for the electric-type mobile charging car according to the present invention, it can be easily conceived that the following three switching modes can exist based on the difference of the switch structure in the present invention: (1) manual connection and manual switching modes; (2) manual connection and automatic switching modes; (3) automatic connection and automatic switching modes.
The detailed description of the three switching modes in the energy-up mode is as follows:
(1) manual connection and manual switching to energy increasing mode
And manually connecting the connecting line between the first power interface 111 and the second power interface 121, manually disconnecting the K3 and the K5, closing the K1, the K2, the K4 and the K6, and switching the power supply batteries.
(2) Manual connection and automatic switching to energy increasing mode
After the manual connection of the connection line between the first power interface 111 and the second power interface 121 is performed and the cooperative operation mode is started in a certain manner, the K3 and the K5 are automatically opened and the K1, the K2, the K4 and the K6 are closed. The cooperative operation mode can be started, the default detection connection is automatically switched after the connection is finished, and the cooperative operation mode can be selected on an operation screen of the mobile charging vehicle.
(3) Automatic connection and automatic switching to energization mode
The connection between the first power interface 111 and the second power interface 121 is realized by automatically controlling the closing of the K7, after the cooperative operation mode is started, the K3 and the K5 are automatically disconnected, the K1, the K2, the K4 and the K6 are closed, and the switching of the switch circuit is automatically completed.
The automatic connection and automatic switching to the power-up mode may be further combined with SOC (State Of Charge) detection Of the energy-carrying battery 113 and the power battery 123, and when it is detected that the SOC Of the energy-carrying system is less than the second set threshold T1, preferably T1 ═ 5%, and the SOC Of the power battery 123 is still greater than the third set threshold T2, preferably T2 ═ 60%, the automatic connection and automatic switching mode is performed.
The three switching modes in the range extending mode are described in detail as follows:
(1) manual connection and manual switching to range extending mode
When the power battery 123 is short of power supply, that is, the remaining capacity of the power battery is less than a first set threshold, for example, the SOC is less than 5%, the vehicle is stopped, K6 is disconnected, the electrical connection between the first power interface 111 and the second power interface 121 is connected, and when the disconnection of K2 is maintained, K1, K3, K4 and K5 are manually closed, so that the power supply of the energy-carrying battery 113 to the mobile charging vehicle load 30 is realized, and the cruising range of the mobile charging vehicle is increased.
(2) Manual connection and automatic switching to range extending mode
When the power battery 123 is short of power supply, that is, the remaining capacity of the power battery is less than a first set threshold, for example, SOC < 5%, the vehicle is stopped, and an automatic range extending mode is set in the mobile charging vehicle control system, and meanwhile, the electrical connection line between the first power interface 111 and the second power interface 121 is connected. When the control system is in the range extending mode and detects that the electrical connection is completed, the K6 and the K2 are automatically opened, the K1, the K3, the K4 and the K5 are closed, and the energy-carrying battery 113 supplies energy to the mobile charging vehicle load 30.
(3) Automatic connection and automatic switching to range extending mode
When the power battery 123 is short of power supply, that is, the remaining capacity of the power battery is less than the first set threshold, for example, SOC < 5%, the vehicle can be stopped, or the vehicle can be automatically switched to neutral, if the control system is set in the range extending mode at this time, and an electrical circuit which is disconnected through the contactor K7 is arranged between the first power interface 111 and the second power interface 121, the K6 and the K2 are automatically disconnected, and the K1, the K3, the K4, the K5 and the K7 are closed, so that the energy-carrying battery 113 supplies power to the mobile charging vehicle load 30.
In combination with the above description of the technical solution of the method for calculating service capability of an electric mobile charging car according to the present invention, in practical applications, the working mode of the mobile charging car may be set in the aspect of controlling the overall capability of the mobile charging car, and the service capability of the mobile charging car in different working modes may be calculated.
The following describes, by way of example, three operating modes of the mobile charging vehicle in an energy cooperative control manner, and how to switch between the three operating modes under different energy compensation requirement characteristics.
As shown in fig. 3, the horizontal axis represents the service radius, the vertical axis represents the output capacity, Q1-75 represents the maximum output capacity of the energy-carrying battery 113 of 75kWh, Q2-120 represents the maximum output capacity of 120kWh of the energy-carrying battery 113 and the power battery 123 as a whole, Q3-40 represents the minimum output capacity of the energy-carrying battery 113 of 40kWh, D1-100 represents the maximum service radius of the power battery 123 of 100km, D2-170 represents the maximum service radius of the power battery 123 of 170km, and D3-30 represents the maximum service radius of the power battery 123 of 30 km.
When the power battery is operated in the independent mode, the output capacity is determined by the capacity of the energy-carrying battery 113, the maximum is 75kWh, and the service radius is determined by the endurance mileage of the power battery 123, and is 100 km.
When switching to the boost mode, the output charge capacity can be extended to 120kWh, but the corresponding service radius becomes smaller.
When switching to the extended range mode, the service radius may be extended to 170km, but the output power may be correspondingly reduced.
In actual operation, firstly, service requirements are collected, whether the service requirements are in an area which can be covered by three modes of the service charging vehicle is judged, and then the service charging vehicle is switched to the corresponding mode by using a control method according to the required electric quantity and distance, and the service is provided.
The external charging object described in the invention is an electric vehicle, and in practical application, the external charging object can also be set for other charging objects.
Those of skill in the art will appreciate that the method steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described above generally in terms of their functionality in order to clearly illustrate the interchangeability of electronic hardware and software. Whether such functionality is implemented as electronic hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.

Claims (13)

1. A power supply method of an electric mobile charging vehicle is applied to the mobile charging vehicle comprising a power supply system and an energy supplementing power supply system, wherein the power supply system comprises a power battery and a power battery high-voltage distribution system, the energy supplementing power supply system comprises an energy carrying battery and an energy carrying battery high-voltage distribution system, and the power supply system is characterized in that the power supply battery is switched based on a selected working mode;
the power supply battery comprises a power battery and an energy carrying battery;
the working mode comprises a range extending mode and an energy increasing mode;
the switching of the power supply battery comprises the following steps: the power supply battery is switched to provide electric energy for charging for the external electric vehicle through the power battery of the mobile charging vehicle in the energy increasing mode; the power supply battery is switched to provide electric energy for the load of the mobile charging vehicle through the energy carrying battery in the range extending mode;
in the energy increasing mode, the power battery sequentially passes through a power battery high-voltage distribution system with a DC/DC converter and an energy-carrying battery high-voltage distribution system to provide electric energy for charging an external electric vehicle;
the power supply circuit is characterized in that a power supply path for providing charging electric energy for an external electric vehicle by a power battery is built by controlling switch circuits K1, K2, K3, K4, K5 and K6; the system comprises a power battery high-voltage distribution system, a charging gun, a power battery high-voltage distribution system, a K1, a K2, a K5, a K6 and a power battery, wherein the K1 is arranged between the power battery high-voltage distribution system and a first power interface, the K2 is arranged between the power battery high-voltage distribution system and the charging gun, the K3 is arranged between the power battery and the power battery high-voltage distribution system, the K4 is arranged between the power battery high-voltage distribution system and a second power interface, the K5 is arranged at a load power supply port of a mobile charging vehicle;
in the energizing mode, the following steps are executed:
electrically connecting the first power interface and the second power interface;
and controlling K1, K2, K4 and K6 to be closed, and K3 and K5 to disconnect power supply lines for building power batteries to provide charging electric energy for external electric vehicles.
2. The power supply method according to claim 1, wherein the switching of the power supply battery based on the selected operation mode includes:
selecting a working mode, and switching the power supply battery according to a switching method of the power supply battery in the selected working mode when the residual capacity of the power supply battery meets a set switching condition;
when the selected working mode is the range extending mode, the set switching condition is that the residual electric quantity of the power battery is smaller than a first set threshold value; when the selected working mode is the energy increasing mode, the set switching condition is that the residual capacity of the energy carrying battery is smaller than a second set threshold value, and the residual capacity of the power battery is larger than a third set threshold value.
3. The power supply method according to claim 1, wherein the first power interface and the second power interface are connected by a line with a switch circuit K7.
4. The power supply method according to claim 3, wherein the switch circuits K1, K2, K3, K4, K5, K6, K7 are electromagnetic relays; the opening and closing states of K1, K2, K3, K4, K5, K6 and K7 are controlled by a single chip microcomputer.
5. The power supply method according to claim 1 or 2, wherein in the extended range mode, the energy-carrying battery supplies power to the mobile charging vehicle load sequentially through an energy-carrying battery high-voltage distribution system and a power battery high-voltage distribution system.
6. The power supply method according to claim 5, characterized in that a power supply path for providing electric energy for the mobile charging vehicle load by an energy-carrying battery is established by controlling the switch circuits K1, K2, K3, K4, K5 and K6;
the range extending mode comprises the following steps:
electrically connecting the first power interface and the second power interface;
and controlling K1, K3, K4 and K5 to be closed and K6 and K2 to be opened, and building a power supply path for providing electric energy for the mobile charging vehicle load by the energy-carrying battery.
7. The power supply method according to claim 6, wherein the first power interface and the second power interface are connected by a line with a switch circuit K7.
8. The power supply method according to claim 7, wherein the switch circuits K1, K2, K3, K4, K5, K6, K7 are electromagnetic relays; the opening and closing states of K1, K2, K3, K4, K5, K6 and K7 are controlled by a single chip microcomputer.
9. A service capability calculation method for an electric mobile charging vehicle is characterized in that based on the power supply method for the electric mobile charging vehicle as claimed in any one of claims 1 to 7, the service capability is calculated according to the selected working mode;
the working mode comprises a range extending mode and an energy increasing mode;
the calculation of the service capacity comprises the calculation of the range-extending mode service capacity and the calculation of the energy-increasing mode service capacity;
the service capabilities comprise the driving range of the mobile charging vehicle and the charging capacity of the available electric vehicle.
10. The method of claim 9, wherein the computing of the enablement mode service capability comprises: calculating the available running electric quantity of the mobile charging vehicle in the energy carrying battery and the power battery according to the electric quantity required by the charging service of the electric vehicle in the current service period, and calculating the available running mileage of the mobile charging vehicle based on the calculated available running electric quantity of the mobile charging vehicle;
setting the electric quantity required by the charging service of the electric vehicle to be larger than the electric quantity of the energy-carrying battery in the energy increasing mode;
the service period is the process from full charge starting to recharging of the mobile charging vehicle.
11. The method of claim 10, wherein the calculating of the extended range mode service capability comprises: calculating the electric quantity required by the mobile charging vehicle in the energy carrying battery and the power battery for running the mobile charging vehicle according to the running mileage required by the mobile charging vehicle in the current service period, and calculating the available electric vehicle charging electric quantity based on the calculated electric quantity required by the mobile charging vehicle for running;
the electric quantity required by the running of the mobile charging vehicle is set to be larger than the electric quantity of the power battery in the range extending mode;
the service period is the process from full charge starting to recharging of the mobile charging vehicle.
12. The computing method of any of claims 9 to 11, wherein the service capabilities further comprise a mobile charging cart service radius; and the service radius of the mobile charging vehicle is calculated and obtained according to the driving mileage of the mobile charging vehicle.
13. The computing method according to any one of claims 9 to 11, wherein the operation modes further include a stand-alone mode;
the calculation of service capabilities further comprises a calculation of independent mode service capabilities;
the calculation of the independent mode service capability comprises the following steps: calculating the driving range of the mobile charging vehicle service in the current service period according to the electric quantity of the power battery, and calculating the charging electric quantity of the electric vehicle available for the mobile charging vehicle service in the current service period according to the electric quantity of the energy-carrying battery;
the service period is the process from full charge starting to recharging of the mobile charging vehicle.
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