CN114043882A - Wireless charging system adaptive to various two-wheeled electric vehicle batteries - Google Patents

Wireless charging system adaptive to various two-wheeled electric vehicle batteries Download PDF

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Publication number
CN114043882A
CN114043882A CN202111357480.3A CN202111357480A CN114043882A CN 114043882 A CN114043882 A CN 114043882A CN 202111357480 A CN202111357480 A CN 202111357480A CN 114043882 A CN114043882 A CN 114043882A
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China
Prior art keywords
vehicle
receiving
mounted battery
voltage
mcu processor
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CN202111357480.3A
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Chinese (zh)
Inventor
刘之涛
刘佳
陈文杰
徐赵文
王树伟
周国军
陈飞龙
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Juchong Hangzhou New Energy Co ltd
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Juchong Hangzhou New Energy Co ltd
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Priority to CN202111357480.3A priority Critical patent/CN114043882A/en
Publication of CN114043882A publication Critical patent/CN114043882A/en
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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
    • B60L53/10—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
    • B60L53/12—Inductive energy transfer
    • B60L53/126—Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
    • 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
    • B60L53/12—Inductive energy transfer
    • B60L53/122—Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
    • 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
    • B60L53/35—Means for automatic or assisted adjustment of the relative position of charging devices and vehicles
    • B60L53/38—Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
    • 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
    • B60L2200/00—Type of vehicles
    • B60L2200/24—Personal mobility 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
    • B60L2200/00—Type of vehicles
    • B60L2200/46—Vehicles with auxiliary ad-on propulsions, e.g. add-on electric motor kits for bicycles
    • 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
    • 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
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

Abstract

The invention discloses a wireless charging system adaptive to various two-wheeled electric vehicle batteries, which comprises a ground transmitting device, a vehicle-mounted receiving device, a current sampling circuit, a voltage sampling circuit, a power management chip, a receiving end MCU (microprogrammed control unit) processor and a receiving end wireless communication module. In the invention, when the receiving coil of the vehicle-mounted receiving device receives the electric energy of the transmitting coil in a standby state, the power management chip receives the electric energy of the receiving coil, triggers the power management chip to work and drives the receiving end MCU processor to work, the voltage sampling circuit collects the voltage of the vehicle-mounted battery in real time and transmits the voltage of the vehicle-mounted battery to the receiving end MCU processor, the receiving end MCU processor transmits the voltage information of the vehicle-mounted battery to the ground transmitting device through the receiving end wireless communication module, and the ground transmitting device automatically matches the charging characteristic curve of the corresponding vehicle-mounted battery according to the voltage and capacity information of the vehicle-mounted battery and automatically selects the corresponding charging mode.

Description

Wireless charging system adaptive to various two-wheeled electric vehicle batteries
Technical Field
The invention relates to the technical field of wireless charging, in particular to a wireless charging system suitable for various two-wheeled electric vehicle batteries.
Background
The quantity of electric bicycles in China reaches 3 hundred million scales, the charging times are up to 1 hundred million times every day, however, because a great number of electric vehicles of different brands exist in the market, the electric vehicles of all brands have different voltage levels and capacities, a great number of electric vehicle chargers of different types exist in the market, the corresponding electric vehicle chargers can only charge the electric vehicles of specific models, and are not suitable for electric vehicle chargers of other types, and great inconvenience is brought to the charging of electric vehicle users.
The voltage class of the electric vehicle battery on the market at present is generally as follows: five of 36V, 48V, 60V, 64V and 72V, 36V is commonly used as: 36V 10AH, 36V 12AH, respectively also 36V 14AH, 36V 17AH, 36V 20AH, 48V are commonly used: 48V 10AH, 48V 12AH, 48V 14AH, 48V 17AH, 48V20AH, 60V 20AH and 60V 32AH are mainly used for 60V, 64V 20AH and 64V 32AH are mainly used for 64V, and 72V 12AH, 72V 20AH and 72V 32AH are mainly used for 72V.
The charging current of the batteries of electric vehicles with different specifications is related to the battery type and the battery capacity, the battery types on the market at present are mainly lead-acid batteries and lithium batteries, the charging current of the lead-acid batteries is 0.1C to 0.25C, and the charging current of the lithium batteries is 0.5C to 1C, where C is the ratio of the current magnitude during charging and discharging of the batteries, i.e. the multiplying power, and the charging and discharging multiplying power is the charging and discharging current/rated capacity, for example: the battery is 48V20AH, then 0.01C is 200 mA.
The invention aims to design a wireless charging system suitable for various, even any type of electric vehicle batteries, automatically detects the type of the charging battery in the charging process, realizes automatic matching with a charging method of a corresponding type, replaces various devices with one charging device, not only improves the charging efficiency and the use convenience of electric vehicle users, but also saves a large amount of social resources, and has wide application prospect.
Disclosure of Invention
In order to solve the technical problems mentioned in the background art, a wireless charging system adapted to various two-wheeled electric vehicle batteries is proposed.
In order to achieve the purpose, the invention adopts the following technical scheme:
a wireless charging system adaptive to various two-wheeled electric vehicle batteries comprises a ground transmitting device, a vehicle-mounted receiving device, a current sampling circuit, a voltage sampling circuit, a power management chip, a receiving end MCU (microprogrammed control unit) processor and a receiving end wireless communication module;
the ground transmitting device is connected with the transmitting coil, the vehicle-mounted receiving device is connected with the receiving coil, and when the receiving coil receives the electric energy of the transmitting coil in a standby state, the power management chip receives the electric energy of the receiving coil, triggers the power management chip to work and drives the MCU processor at the receiving end to work;
the current sampling circuit and the voltage sampling circuit respectively collect the current and the voltage of the vehicle-mounted battery in real time, the voltage sampling circuit transmits the voltage of the vehicle-mounted battery to the receiving end MCU processor, the receiving end MCU processor transmits the voltage information of the vehicle-mounted battery to the ground transmitting device through the receiving end wireless communication module, the ground transmitting device automatically matches the charging characteristic curve of the corresponding vehicle-mounted battery according to the voltage and the capacity information of the vehicle-mounted battery, and the corresponding charging mode is automatically selected.
As a further description of the above technical solution:
the vehicle-mounted battery management system provides state information of the vehicle-mounted battery, the state information of the vehicle-mounted battery is transmitted to the receiving end MCU processor through the CAN communication circuit and then transmitted to the ground transmitting device, and the ground transmitting device automatically matches a charging characteristic curve of the corresponding vehicle-mounted battery according to the obtained state information of the vehicle-mounted battery and automatically selects a corresponding charging mode.
As a further description of the above technical solution:
the ground transmitting device comprises an input power supply, a high-frequency inverter circuit, a resonance compensation circuit, a transmitting end MCU processor and a transmitting end wireless communication module, and the ground transmitting device controls the working frequency of the high-frequency inverter circuit through the transmitting end MCU processor, changes the power of transmitting energy of a transmitting coil and accordingly realizes the driving control of the power management chip.
As a further description of the above technical solution:
the ground transmitting device also comprises a DC/DC converter, the ground transmitting device controls the output voltage of the DC/DC converter through the MCU processor at the transmitting end, and the power of the energy transmitted by the transmitting coil is changed, so that the driving control of the power management chip is realized.
As a further description of the above technical solution:
before the vehicle-mounted receiving device receives the electric energy of the transmitting coil in a standby state by the receiving coil, the ground transmitting device controls the high-frequency inverter circuit to enable the transmitting coil to generate periodic low-power energy to wait for the receiving coil to receive the electric energy;
in the single periodic low-power energy transfer process, the high level time is as follows: t isHeight ofT x D, where T-a single periodic low power energy transfer period of 20ms, 30ms or 40ms, and D-high accounts for the proportion of the entire transfer period.
As a further description of the above technical solution:
the vehicle-mounted battery monitoring system is characterized by further comprising a protection switch, the protection switch is connected between the vehicle-mounted receiving device and the vehicle-mounted battery, the receiving end MCU processor judges whether the collected voltage of the vehicle-mounted battery is normal or not, if yes, the receiving end MCU processor controls the protection switch to be closed, and otherwise, the protection switch is controlled to be opened.
As a further description of the above technical solution:
the capacity information of the vehicle-mounted battery is stored in the receiving end MCU processor in advance, the charging characteristic curves of the vehicle-mounted batteries with different specifications and capacities are stored in the ground transmitting device in advance, and the state information comprises the voltage and the capacity of the vehicle-mounted battery.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the invention, a ground transmitting device is connected with a transmitting coil, a vehicle-mounted receiving device is connected with a receiving coil, when the receiving coil receives the electric energy of the transmitting coil in a standby state, a power management chip receives the electric energy of the receiving coil, triggers the power management chip to work and drives a receiving end MCU processor to work, a current sampling circuit and a voltage sampling circuit respectively collect the current and the voltage of a vehicle-mounted battery in real time, the voltage sampling circuit transmits the voltage of the vehicle-mounted battery to the receiving end MCU processor, the receiving end MCU processor transmits the voltage information of the vehicle-mounted battery to the ground transmitting device through a receiving end wireless communication module, the ground transmitting device automatically matches the charging characteristic curve of the corresponding vehicle-mounted battery according to the voltage and capacity information of the vehicle-mounted battery, and automatically selects the corresponding charging mode.
2. In the invention, the power management chip can normally work after being driven by the energy received by the receiving coil, the driving voltage is generated to drive the receiving end MCU processor to work, the periodic driving voltage output by the power management chip is activated when the periodic low-power energy is received, and the receiving end MCU processor can not be activated when the high level is generated and the low level is generated, so that the high level and the low level can be recycled, and the energy loss of the ground transmitting device in a standby state is greatly reduced.
Drawings
Fig. 1 is a schematic diagram illustrating a topology of a wireless charging system adapted to a plurality of two-wheeled electric vehicle batteries according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a ground transmitting device of a wireless charging system adapted to a plurality of two-wheeled electric vehicle batteries according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a ground transmitting device with a DC/DC converter for a wireless charging system adapted to various two-wheeled electric vehicle batteries according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a receiving end structure of a wireless charging system adapted to a plurality of types of two-wheeled electric vehicle batteries, the receiving end structure having a CAN communication circuit and an on-board battery management system according to an embodiment of the invention;
fig. 5 is a graph showing output voltage waveforms of a high-frequency inverter circuit for periodic low power transmission of a ground receiving device of a wireless charging system adapted to various two-wheeled electric vehicle batteries according to an embodiment of the invention;
fig. 6 is a current waveform diagram of a receiving coil of a ground receiving device of a wireless charging system adapted to various two-wheeled electric vehicle batteries for periodic low power transmission according to an embodiment of the invention;
fig. 7 is a graph showing output voltage waveforms of high-frequency inverter currents for small power transmission of a ground receiving device having a DC/DC converter adapted to a wireless charging system for various two-wheeled electric vehicle batteries according to an embodiment of the present invention;
fig. 8 is a current waveform diagram of a receiving coil of a ground receiving device with a DC/DC converter for periodic small power transmission adapted to a wireless charging system of a plurality of two-wheeled electric vehicle batteries according to an embodiment of the present invention;
fig. 9 is a schematic diagram illustrating high and low levels of driving signals of a wireless charging system adapted to various two-wheeled electric vehicle batteries according to an embodiment of the present invention.
Illustration of the drawings:
1. a ground launch device; 11. inputting a power supply; 12. a high-frequency inverter circuit; 13. a resonance compensation circuit; 14. a transmitting end MCU processor; 15. a transmitting end wireless communication module; 16. a DC/DC converter; 2. a vehicle-mounted receiving device; 3. a protection switch; 4. a current sampling circuit; 5. a voltage sampling circuit; 6. a power management chip; 7. receiving end MCU processor; 8. a receiving end wireless communication module; 9. a CAN communication circuit; 10. an in-vehicle battery management system.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1-9, the present invention provides a technical solution: a wireless charging system adaptive to various two-wheeled electric vehicle batteries comprises a ground transmitting device 1, a vehicle-mounted receiving device 2, a current sampling circuit 4, a voltage sampling circuit 5, a power management chip 6, a receiving end MCU (microprogrammed control Unit) processor 7, a receiving end wireless communication module 8 and a protection switch 3, wherein the protection switch 3 is connected between the vehicle-mounted receiving device 2 and the vehicle-mounted batteries, the receiving end MCU processor 7 judges whether the acquired voltage of the vehicle-mounted batteries is normal or not, if so, the receiving end MCU processor 7 controls the protection switch 3 to be closed, otherwise, the protection switch 3 is controlled to be opened;
the output ends of the current sampling circuit 4 and the voltage sampling circuit 5 are connected with a receiving end MCU processor 7, the input end of the power management chip 6 is connected with a receiving coil, the output end of the power management chip 6 is connected with the receiving end MCU processor 7, and the receiving end MCU processor 7 is connected with a receiving end wireless communication module 8;
the capacity information of the vehicle-mounted battery is stored in the receiving end MCU processor 7 in advance, the charging characteristic curves of the vehicle-mounted batteries with different specifications and capacities are stored in the ground transmitting device 1 in advance, and the state information comprises the voltage and the capacity of the vehicle-mounted battery;
the ground transmitting device 1 is connected with the transmitting coil, the vehicle-mounted receiving device 2 is connected with the receiving coil, and when the receiving coil of the vehicle-mounted receiving device 2 receives the electric energy of the transmitting coil in a standby state, the power management chip 6 receives the electric energy of the receiving coil, triggers the power management chip 6 to work, and drives the receiving end MCU processor 7 to work;
the current sampling circuit 4 and the voltage sampling circuit 5 respectively collect the current and the voltage of the vehicle-mounted battery in real time, the voltage sampling circuit 5 transmits the voltage of the vehicle-mounted battery to the receiving end MCU processor 7, the receiving end MCU processor 7 transmits the voltage information of the vehicle-mounted battery to the ground transmitting device 1 through the receiving end wireless communication module 8, the ground transmitting device 1 automatically matches the charging characteristic curve of the corresponding vehicle-mounted battery according to the voltage and the capacity information of the vehicle-mounted battery, and the corresponding charging mode is automatically selected;
when the vehicle-mounted battery does not need to be charged, the vehicle-mounted receiving device 2 is in a closed state, at the moment, the ground transmitting device 1 works in a standby state and waits for charging equipment needing to arrive, wherein the ground transmitting device 1 controls the high-frequency inverter circuit 12, so that the transmitting coil generates periodic low-power energy and waits for the receiving coil to receive the energy.
Referring to fig. 4, the vehicle-mounted battery management system 10 provides state information of the vehicle-mounted battery, the state information of the vehicle-mounted battery is transmitted to the receiving end MCU processor 7 through the CAN communication circuit 9 and then transmitted to the ground transmitting device 1, and the ground transmitting device 1 automatically matches a charging characteristic curve of the corresponding vehicle-mounted battery according to the obtained state information of the vehicle-mounted battery, and automatically selects a corresponding charging mode.
Referring to fig. 2, 5 and 6, the ground transmitting device 1 includes an input power source 11, a high-frequency inverter circuit 12, a resonance compensation circuit 13, a transmitting end MCU processor 14 and a transmitting end wireless communication module 15, the ground transmitting device 1 controls the working frequency of the high-frequency inverter circuit 12 through the transmitting end MCU processor 14, and changes the power of the transmitting coil to transmit energy, thereby implementing the driving control of the power management chip 6, at this time, the output voltage waveform of the high-frequency inverter circuit 12 is as shown in fig. 5, and in this state, the current waveform received by the receiving coil is as shown in fig. 6;
when the ground transmitting device 1 reduces the working frequency of the high-frequency inverter circuit 12 through the transmitting end MCU processor 14, the current received by the receiving coil is in a larger value, and the power management chip 6 is driven to start working;
when the ground transmitting device 1 increases the working frequency of the high-frequency inverter circuit 12 through the transmitting end MCU processor 14, the current received by the receiving coil is at a small value and cannot drive the power management chip 6 to work.
Referring to fig. 3, 7 and 8, the ground transmitting device 1 further includes a DC/DC converter 16, the receiving ground transmitting device 1 controls the output voltage of the DC/DC converter 16 through the transmitting end MCU processor 14, and changes the power of the transmitting energy of the transmitting coil, so as to realize the driving control of the power management chip 6, at this time, the output voltage waveform of the high-frequency inverter circuit 12 is as shown in fig. 7, and in this state, the current waveform received by the receiving coil is as shown in fig. 8;
when the ground transmitting device 1 increases the output voltage of the DC/DC converter 16 through the transmitting end MCU processor 14, the current received by the receiving coil is in a larger value, the power management chip 6 is driven to start working;
when the ground transmitting device 1 reduces the output voltage of the DC/DC converter 16 through the transmitting end MCU processor 14, the current received by the receiving coil is at a small value, and the power management chip 6 cannot be driven to operate.
Referring to fig. 9, before the vehicle-mounted receiving device 2 receives the electric energy of the transmitting coil in the standby state at the receiving coil, the ground transmitting device 1 controls the high-frequency inverter circuit 12 to make the transmitting coil generate the periodic low-power energy to wait for the receiving coil to receive the electric energy;
in the single periodic low-power energy transfer process, the high level time is as follows: t isHeight ofT x D, where T-a single periodic low power energy transfer period of 20ms, 30ms or 40ms, D-high accounts for the proportion of the entire transfer period, and D is the magnitude of DAs the case may be, D is 0.33 in this embodiment;
fig. 9 shows a high-low level form diagram of a driving signal with a unit low-power energy transfer period of 30ms and a high-level duty ratio of 0.33, when the power management chip 6 is driven by the energy received by the receiving coil, the driving signal can work normally, a driving voltage is generated to drive the receiving-end MCU processor 7 to work, after receiving the periodic low-power energy, the periodic driving voltage output by the power management chip 6 is as shown in fig. 9, when a high level of 10ms occurs, the receiving-end MCU processor 7 is activated, and when a low level of 20ms occurs, the receiving-end MCU processor 7 cannot be activated, so that the high level and the low level are recycled, and the energy loss of the ground transmitting device 1 in a standby state is greatly reduced.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (7)

1. A wireless charging system adaptive to various two-wheeled electric vehicle batteries is characterized by comprising a ground transmitting device (1), a vehicle-mounted receiving device (2), a current sampling circuit (4), a voltage sampling circuit (5), a power management chip (6), a receiving end MCU processor (7) and a receiving end wireless communication module (8);
the ground transmitting device (1) is connected with the transmitting coil, the vehicle-mounted receiving device (2) is connected with the receiving coil, and when the receiving coil of the vehicle-mounted receiving device (2) receives the electric energy of the transmitting coil in a standby state, the power management chip (6) receives the electric energy of the receiving coil, triggers the power management chip (6) to work, and drives the receiving end MCU processor (7) to work;
current sampling circuit (4) and voltage sampling circuit (5) gather vehicle-mounted battery's electric current and voltage respectively in real time, voltage sampling circuit (5) transmit vehicle-mounted battery voltage for receiving terminal MCU treater (7), and receiving terminal MCU treater (7) transmit vehicle-mounted battery's voltage information for ground emitter (1) through receiving terminal wireless communication module (8), and ground emitter (1) is according to vehicle-mounted battery's voltage and capacity information, and the charging characteristic curve of corresponding vehicle-mounted battery is matchd automatically, the corresponding mode of charging of automatic selection.
2. The wireless charging system adapted to various two-wheeled electric vehicle batteries according to claim 1, further comprising a CAN communication circuit (9) and a vehicle-mounted battery management system (10), wherein the vehicle-mounted battery management system (10) provides status information of the vehicle-mounted battery, the status information of the vehicle-mounted battery is transmitted to the receiving end MCU processor (7) through the CAN communication circuit (9) and then transmitted to the ground transmitting device (1), and the ground transmitting device (1) automatically matches the charging characteristic curve of the corresponding vehicle-mounted battery according to the obtained status information of the vehicle-mounted battery, and automatically selects the corresponding charging mode.
3. The wireless charging system adapted to various two-wheeled electric vehicle batteries according to claim 1, wherein the ground transmitting device (1) comprises an input power supply (11), a high-frequency inverter circuit (12), a resonance compensation circuit (13), a transmitting end MCU processor (14) and a transmitting end wireless communication module (15), and the ground transmitting device (1) controls the working frequency of the high-frequency inverter circuit (12) through the transmitting end MCU processor (14) to change the power of the transmitting coil for transmitting energy, thereby realizing the driving control of the power management chip (6).
4. The wireless charging system adapted to a plurality of two-wheeled electric vehicle batteries according to claim 3, wherein the ground transmitting device (1) further comprises a DC/DC converter (16), and the ground transmitting device (1) controls the output voltage of the DC/DC converter (16) through the transmitting end MCU processor (14) to change the power transmitted by the transmitting coil, thereby realizing the driving control of the power management chip (6).
5. The wireless charging system adapted to a plurality of two-wheeled electric vehicle batteries according to claim 4, wherein when the vehicle-mounted receiving device (2) receives the electric energy of the transmitting coil in a standby state before the receiving coil receives the electric energy of the transmitting coil, the ground transmitting device (1) controls the high-frequency inverter circuit (12) to enable the transmitting coil to generate periodic low-power energy to wait for the receiving coil to receive;
in the single periodic low-power energy transfer process, the high level time is as follows: t isHeight ofT x D, where T-a single periodic low power energy transfer period of 20ms, 30ms or 40ms, and D-high accounts for the proportion of the entire transfer period.
6. The wireless charging system adapted to various two-wheeled electric vehicle batteries according to claim 1, further comprising a protection switch (3), wherein the protection switch (3) is connected between the vehicle-mounted receiving device (2) and the vehicle-mounted battery, the receiving end MCU processor (7) judges whether the acquired voltage of the vehicle-mounted battery is normal, if so, the receiving end MCU processor (7) controls the protection switch (3) to be closed, otherwise, the receiving end MCU processor controls the protection switch (3) to be opened.
7. The wireless charging system adapted to various two-wheeled electric vehicle batteries according to claim 2, wherein capacity information of the vehicle-mounted battery is pre-stored in the receiving-end MCU processor (7), charging characteristic curves of vehicle-mounted batteries of different specifications and capacities are pre-stored in the ground transmitting device (1), and the state information comprises the voltage and capacity of the vehicle-mounted battery.
CN202111357480.3A 2021-11-16 2021-11-16 Wireless charging system adaptive to various two-wheeled electric vehicle batteries Pending CN114043882A (en)

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