CN110509790B - Wireless charging system, vehicle-mounted charging device and new energy automobile - Google Patents
Wireless charging system, vehicle-mounted charging device and new energy automobile Download PDFInfo
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- 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
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- 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
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- 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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- 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
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Abstract
The invention relates to a wireless charging system, a vehicle-mounted charging device and a new energy automobile, wherein the voltage of a power battery is detected by a voltage detection module, the maximum allowable charging current of the power battery is detected by a current detection module, the maximum allowable charging power of the power battery can be obtained according to the real-time voltage and the maximum allowable charging current of the power battery, the maximum allowable charging power is output to a transmitting device, the transmitting device outputs corresponding charging power according to the maximum allowable charging power of the power battery, the charging power output by the transmitting device is ensured to be maximally equal to the maximum allowable charging power of the power battery, the phenomenon that the charging power output by the transmitting device is overlarge or undersize is avoided, further, the damage to the power battery is avoided, and the rapid charging of the power battery can also be realized.
Description
Technical Field
The invention relates to a wireless charging system, a vehicle-mounted charging device and a new energy automobile.
Background
The new energy vehicles are more and more popularized in the market by virtue of the advantages of energy conservation, environmental protection and low noise, and buses are used as important components of urban public transport and have the characteristics of long driving time, long driving distance and the like due to the special operation mode; the inter-city group passenger transport needs a quite large power battery capacity to meet the requirement due to the long driving range, but is limited by the high cost of the power battery, so that the buses in the city need to be charged frequently, and the operation efficiency is reduced; the intercity group passenger transportation needs to pay larger cost to ensure basic operation. At present, a new energy vehicle (a hybrid vehicle runs in a pure electric mode) takes a power battery as a whole power source, and due to the characteristics that a bus has long driving time and inter-city group passenger transportation has long driving range, the use requirement of the vehicle is completely met, and the power battery with quite large capacity needs to be equipped, so that the cost of a single vehicle is overhigh.
Chinese patent document No. CN205753573U discloses a wireless charging control system for an electric vehicle, which includes a transmitting device and a receiving device, wherein the transmitting device includes a transmitting end master control circuit and a transmitting end charging circuit, and the receiving device includes a receiving end slave control circuit and a receiving end charging circuit. Although the charging control system can realize wireless charging of the electric automobile, the charging control system only simply realizes wireless charging, cannot control the charging output power of the charging circuit according to the maximum allowable charging power of the power battery, may cause the charging output power of the charging circuit in the transmitting device to be too large or too small, may damage vehicle-mounted related circuits and the power battery when the charging output power is too large, and when the charging output power is too small, the charging consumption time is too long, the charging efficiency is low, and quick charging cannot be realized.
Disclosure of Invention
The invention aims to provide a wireless charging system, which is used for solving the problem that the existing wireless charging system cannot control the charging output power according to the maximum allowable charging power of a power battery. The invention simultaneously provides a vehicle-mounted charging device and a new energy automobile.
In order to achieve the above object, the present invention includes the following technical solutions.
The utility model provides a wireless charging system, includes emitter and receiving arrangement, emitter includes emitter charging circuit, receiving arrangement includes control module and receiving terminal charging circuit, receiving arrangement still includes the voltage detection module that is used for detecting power battery voltage and is used for detecting the current detection module of the biggest allowwing charging current of power battery, the detection signal output part of voltage detection module and the detection signal output part of current detection module are connected control module's detection signal input part, control module calculates the biggest allowwing charging power who obtains power battery according to power battery's voltage and the biggest allowwing charging current, and control module exports corresponding requested power to emitter, and emitter exports corresponding power according to requested power and charges for the vehicle.
The voltage of the power battery is detected through the voltage detection module, the maximum allowable charging current of the power battery is detected through the current detection module, the maximum allowable charging power of the power battery can be obtained according to the real-time voltage and the maximum allowable charging current of the power battery, corresponding request power is obtained according to the maximum allowable charging power, the control module outputs corresponding request power to the transmitting device, the transmitting device outputs corresponding charging power according to the request power, the charging power output by the transmitting device is guaranteed to be maximally equal to the maximum allowable charging power of the power battery, the phenomenon that the charging power output by the transmitting device is too large or too small is avoided, damage to the power battery is avoided, the charging efficiency is improved, and quick charging of the power battery is achieved.
Furthermore, the receiving device further comprises a motor required power detection module for detecting the required power of the driving motor, a detection signal output end of the motor required power detection module is connected with a detection signal input end of the control module, the control module outputs corresponding request power to the transmitting device according to the maximum allowable charging power and the required power of the driving motor, and the transmitting device outputs corresponding power according to the request power.
The wireless charging system can be a driving type wireless charging system, charging of a vehicle in the driving process can be achieved, required power of a driving motor of the vehicle is obtained according to a motor required power detection module, and power required to be output by a transmitting device can be obtained by combining maximum allowable charging power of a power battery and required power of the driving motor. Under the condition of ensuring the charging power of the vehicle, the driving power for driving the vehicle is provided, and the effective charging in the driving process is met.
Further, the control module receives the output power of the transmitting device in real time, and when the output power of the transmitting device is monitored to be larger than the request power sent by the control module and the error value of the output power and the request power is larger than the set threshold value, the control module outputs a stop instruction to the transmitting device. The power battery can be prevented from being burnt out.
Further, after the vehicle is powered on, the control module sends a working mode standby instruction to the transmitting device, the requested power is zero, and after the transmitting device feeds back a corresponding instruction, the control module sends a working mode instruction of constant voltage charging or constant current charging to the transmitting device and sends a corresponding requested power to the transmitting device. Before sending the corresponding request power to the transmitting device, it needs to judge whether the transmitting device can normally operate or not, and after the transmitting device feeds back the corresponding instruction, the transmitting device indicates normal operation, and at this time, the control module sends the corresponding working mode instruction to the transmitting device to provide power to the receiving device.
Further, the motor required power detection module comprises a motor rotating speed detection unit and a motor output torque detection unit. The motor output torque detection unit detects the output torque of the motor according to the rotation speed information of the driving motor detected by the motor rotation speed detection unit, and then the required power of the driving motor can be obtained through the two parameters.
Furthermore, the receiving device further comprises an accelerator pedal opening detection module, a detection signal output end of the accelerator pedal opening detection module is connected with a detection signal input end of the control module, and the control module obtains corresponding required power according to the opening information of the accelerator pedal.
Furthermore, the receiving device further comprises an electric accessory required power detection module for detecting the required power of the vehicle electric accessory, and the detection signal output end of the electric accessory required power detection module is connected with the detection signal input end of the control module.
The utility model provides a vehicle-mounted charging device, includes control module, still includes the voltage detection module that is used for detecting power battery voltage and is used for detecting the current detection module of the maximum allowable charging current of power battery, the detection signal output part of voltage detection module and the detection signal output part of current detection module are connected control module's detection signal input part, control module calculates according to the voltage of power battery and the maximum allowable charging current and obtains the maximum allowable charging power of power battery, and control module exports corresponding power request to emitter to make emitter export corresponding power according to the power request and charge for the vehicle.
Furthermore, the vehicle-mounted charging device further comprises a motor required power detection module for detecting the required power of the driving motor, a detection signal output end of the motor required power detection module is connected with a detection signal input end of the control module, and the control module outputs corresponding request power to the transmitting device according to the maximum allowable charging power and the required power of the driving motor, so that the transmitting device outputs corresponding power according to the request power.
Further, the control module receives the output power of the transmitting device in real time, and when the output power of the transmitting device is monitored to be larger than the request power sent by the control module and the error value of the output power and the request power is larger than the set threshold value, the control module outputs a stop instruction to the transmitting device.
Further, after the vehicle is powered on, the control module sends a working mode standby instruction to the transmitting device, the requested power is zero, and after the transmitting device feeds back a corresponding instruction, the control module sends a working mode instruction of constant voltage charging or constant current charging to the transmitting device and sends a corresponding requested power to the transmitting device.
Further, the motor required power detection module comprises a motor rotating speed detection unit and a motor output torque detection unit.
Further, the vehicle-mounted charging device further comprises an accelerator pedal opening detection module, a detection signal output end of the accelerator pedal opening detection module is connected with a detection signal input end of the control module, and the control module obtains corresponding required power according to opening information of an accelerator pedal.
Furthermore, the vehicle-mounted charging device further comprises an electric accessory required power detection module for detecting the required power of the vehicle electric accessory, and the detection signal output end of the electric accessory required power detection module is connected with the detection signal input end of the control module.
The utility model provides a new energy automobile, includes on-vehicle charging subsystem, on-vehicle charging subsystem includes control module and receiving terminal charging circuit, on-vehicle charging subsystem still including the voltage detection module that is used for detecting power battery voltage and the current detection module that is used for detecting the biggest allowability charging current of power battery, the detection signal output part of voltage detection module and the detection signal output part of current detection module are connected control module's detection signal input part, control module calculates the biggest allowability charging power who obtains power battery according to power battery's voltage and the biggest allowability charging current, and control module exports corresponding power request to emitter to make emitter according to the corresponding power of power request output charge for the vehicle.
Furthermore, the vehicle-mounted charging subsystem further comprises a motor required power detection module for detecting the required power of the driving motor, a detection signal output end of the motor required power detection module is connected with a detection signal input end of the control module, and the control module outputs corresponding requested power to the transmitting device according to the maximum allowable charging power and the required power of the driving motor, so that the transmitting device outputs corresponding power according to the requested power.
Further, the control module receives the output power of the transmitting device in real time, and when the output power of the transmitting device is monitored to be larger than the request power sent by the control module and the error value of the output power and the request power is larger than the set threshold value, the control module outputs a stop instruction to the transmitting device.
Further, after the vehicle is powered on, the control module sends a working mode standby instruction to the transmitting device, the requested power is zero, and after the transmitting device feeds back a corresponding instruction, the control module sends a working mode instruction of constant voltage charging or constant current charging to the transmitting device and sends a corresponding requested power to the transmitting device.
Further, the motor required power detection module comprises a motor rotating speed detection unit and a motor output torque detection unit.
Furthermore, the vehicle-mounted charging subsystem further comprises an accelerator pedal opening detection module, a detection signal output end of the accelerator pedal opening detection module is connected with a detection signal input end of the control module, and the control module obtains corresponding required power according to the opening information of the accelerator pedal.
Furthermore, the vehicle-mounted charging subsystem further comprises an electric accessory required power detection module for detecting the required power of the vehicle electric accessory, and the detection signal output end of the electric accessory required power detection module is connected with the detection signal input end of the control module.
Drawings
Fig. 1 is a block diagram of a wireless charging system architecture;
fig. 2 is a control schematic of a wireless charging system;
fig. 3 is a schematic diagram of a vehicle control strategy architecture of the wireless charging system.
Detailed Description
Embodiments of Wireless charging System
The embodiment provides a wireless charging system, which comprises a transmitting device and a receiving device, wherein the transmitting device is arranged on wireless charging equipment and belongs to a part of the wireless charging equipment; the receiving device is arranged on the vehicle and is a vehicle-mounted charging device corresponding to the wireless charging equipment.
The transmitting device includes a transmitting terminal charging circuit for wirelessly charging the vehicle, which belongs to the prior art and will not be described in detail herein. Of course, no matter how the structures of the transmitting device and the receiving device are, wireless communication is realized between the transmitting device and the receiving device, so that the transmitting device comprises a transmitting end communication module, the receiving device comprises a receiving end communication module, the transmitting end communication module and the receiving end communication module perform wireless communication, the two wireless communication modules can also adopt the existing related equipment, and the detailed description is omitted here.
The receiving device comprises a control module and a receiving end charging circuit, the control module realizes the control of the vehicle-mounted charging part, the receiving end charging circuit corresponds to the transmitting end charging circuit, and the receiving end charging circuit receives the electric energy output by the transmitting end charging circuit in a wireless mode. Since the control module and the receiving terminal charging circuit belong to the prior art, they will not be described in detail here. The control module takes a vehicle control unit as an example.
As shown in fig. 1, the receiving apparatus further includes a voltage detection module and a current detection module, both of which may be existing devices, wherein the voltage detection module is configured to detect a voltage of the power battery, and the current detection module is configured to detect a maximum allowable charging current (i.e., a current limit for charging) of the power battery. And the detection signal output end of the voltage detection module and the detection signal output end of the current detection module are connected with the detection signal input end of the whole vehicle controller. The message sending period of the voltage detection module and the current detection module is 10ms, and the real-time performance of information transmission is guaranteed. The vehicle control unit calculates the maximum allowable charging power of the power battery according to the received voltage of the power battery and the maximum allowable charging current, and the maximum allowable charging power can be obtained by multiplying the voltage by the maximum allowable charging current. The vehicle control unit outputs corresponding request power to the wireless charging device in a wireless communication mode according to the obtained maximum allowable charging power, in this case, the request power is the maximum allowable charging power, the wireless charging device outputs corresponding charging power to charge the vehicle, the charging power output by the wireless charging device is smaller than or equal to the maximum allowable charging power, and in general, the charging power output by the wireless charging device is equal to the maximum allowable charging power. For example, when the real-time voltage of the current power battery is 500V and the maximum allowable charging current is 100A, in the current state, the entire vehicle will only calculate the requested power (500V × 100A — 50kW) with reference to the chargeable power of the battery and output the requested power to the wireless charging device. Of course, if the maximum output power of the wireless charging device is less than the maximum allowable charging power of the vehicle, the wireless charging device outputs at its maximum output power. In addition, the voltage detection module and the current detection module can also be arranged in the battery management system BMS, and the voltage of the power battery and the maximum allowable charging current are obtained by analyzing messages sent by the battery management system BMS.
Further, the wireless charging system is a vehicle-type wireless charging system, such as: the vehicle-mounted power supply system comprises a ground transmitting end, a vehicle-mounted receiving end and a control unit, and the vehicle can provide power for the whole vehicle in the driving process for charging a power battery or driving the whole vehicle. The driving type wireless charging system can supplement the electric quantity of the vehicle-mounted power battery in real time or be directly used for driving the vehicle, ensures the operation mileage of the vehicle, improves the traffic efficiency, effectively reduces the vehicle cost, can provide power for a plurality of vehicles at the same time, and improves the utilization rate of the vehicle. Since the vehicle-mounted wireless charging system has been developed in the prior art, for example, there are related descriptions in a paper named "research progress of wireless charging technology for electric vehicles" and a paper named "research progress of dynamic wireless charging key technology for electric vehicles", then the corresponding wireless charging device belongs to the prior art, and is not described in detail here. Then, the receiving device further comprises a motor required power detection module for detecting the required power of the vehicle driving motor, and a detection signal output end of the motor required power detection module is connected with a detection signal input end of the whole vehicle controller. In this embodiment, the motor required power detection module includes a motor rotation speed detection unit and a motor output torque detection unit, the motor rotation speed detection unit is configured to detect a rotation speed of the driving motor, the motor output torque detection unit is configured to detect an output torque of the motor, and a message sending period of the motor rotation speed and the output torque of the motor is also 10 ms. The required power of the motor can be obtained according to the rotating speed and the output torque of the driving motor, such as: if the vehicle runs in a constant speed (1000rpm) running state and the output torque of the motor is constant 100Nm, the required power of the motor is 1000rpm 100 Nm/9550-10.47 kW. In combination with the maximum allowable charging power, the requested power sent by the vehicle control unit to the wireless charging device is the sum of the maximum allowable charging power and the required power of the motor, and is 50kW +10.47kW, namely 60.47 kW. In addition, the motor rotating speed detection unit and the motor output torque detection unit can also be in output connection with a motor controller, and the motor rotating speed and the motor output torque information are obtained by analyzing a motor controller message.
No matter whether the wireless charging system is a driving type wireless charging system or not, after the vehicle is powered on, the vehicle control unit sends a working mode standby instruction to the wireless charging device, the request power is zero, after the wireless charging device feeds back a corresponding instruction, that is, after the wireless charging device is ready, the vehicle control unit sends a working mode instruction of constant voltage charging or constant current charging to the wireless charging device, and sends a corresponding request power to the transmitting device, for example: the maximum allowed charging power or the sum of the maximum allowed charging power and the required power of the motor. Furthermore, after the vehicle is powered on, whether the wireless charging system has a fault or not needs to be detected, the fault comprises communication faults, fault level information and fault code information, and a working mode standby instruction is sent to the wireless charging equipment after no fault exists.
Regardless of the device and structure of the motor required power detection module, the receiving device further comprises an accelerator pedal opening degree detection module for detecting the opening degree of an accelerator pedal, and a detection signal output end of the accelerator pedal opening degree detection module is connected with a detection signal input end of the vehicle control unit. The accelerator pedal opening degree value is connected to the whole vehicle controller through an accelerator pedal collector through a hard wire, and is converted into a real-time opening degree value through the voltage change of the accelerator pedal collector. The driving intention of a driver, namely the driving power demand is positively correlated with the opening degree of an accelerator pedal, so that the driving power of the whole vehicle can be calculated in real time according to the change of the opening degree of the accelerator pedal, the driving power demand of the whole vehicle is further obtained, and the driving intention of the driver is met. Therefore, the vehicle control unit can obtain the required power of the vehicle according to the opening degree of the accelerator pedal, and then the total required power is obtained by combining the required power and is output to the wireless charging device.
Similarly, no matter whether the wireless charging system is a driving type wireless charging system or not, and no matter what equipment and structure the motor required power detection module is, the receiving device further comprises an electric accessory required power detection module for detecting the required power of the electric accessory of the vehicle, and the detection signal output end of the electric accessory required power detection module is connected with the detection signal input end of the vehicle control unit. When the wireless charging system is a conventional charging system, the required power of the vehicle is obtained by adding the maximum allowable charging power to the required power of the electric accessory; when the wireless charging system is a driving type charging system, the total required power of the vehicle is obtained by adding the required power of the electric accessory, the maximum allowable charging power and the required power of the driving motor, and the total required power is output to the wireless charging equipment.
Fig. 2 is a schematic control diagram of the wireless charging system.
Therefore, depending on the function, the wireless charging system can be divided into three parts: the wireless charging system comprises an information acquisition part (each detection module in the above), an information preprocessing and operation part (the vehicle control unit in the above) and an execution part (the wireless charging equipment in the above).
The information acquisition part can acquire the current allowable charging current limit of the power battery, the battery voltage, the motor rotating speed, the motor output torque, the opening degree of an accelerator pedal and the required power of an electric accessory, in addition, the information acquisition part acquires the information such as the maximum output power, the current working state and the actual output power of the wireless charging equipment through corresponding equipment, and the information acquisition part transmits the acquired information to the whole vehicle controller. The maximum output power and the actual output power of the wireless charging equipment are the message values for analyzing the wireless charging equipment. All the information is transmitted to the whole vehicle control program application layer for subsequent preprocessing and operation.
The vehicle control unit performs preprocessing and operation on all input information, outputs the requested power (namely the required power) to the execution module, and can also output the corresponding working mode to the wireless charging equipment. The requested power output to the wireless charging device is mainly based on the maximum allowable charging power of the power battery and the output power of the current driving motor, and the output of the working mode and the requested power is also transmitted through a message.
The wireless charging equipment receives the whole vehicle control working mode, responds to the whole vehicle control working mode, and outputs the power to the power battery for charging or outputs the power to the motor for driving or working for electric accessories according to the requested power.
As shown in fig. 3, a specific wireless charging control logic is provided, although the invention is not limited to this control logic. After the whole vehicle is electrified, whether a fault exists in a wireless charging system can be detected, the wireless charging system comprises communication faults, fault grade information and fault code information, after no fault exists, a working mode standby instruction is output, the request power is 0kW, after the wireless charging equipment is prepared, namely after a correct working mode instruction is fed back, the whole vehicle can output a working mode of constant-voltage charging or constant-current charging, and simultaneously the required power of the whole vehicle calculated in real time is output: for example, when the vehicle is currently in a parking state, the electrical accessory is in an off state, the real-time voltage of the battery is 500V, and the allowed charging current is 100A, in the current state, the entire vehicle will only calculate the requested power (500V × 100A — 50kW) with reference to the chargeable power of the battery and output the requested power to the wireless charging device; on the basis, if the vehicle is running at a constant speed (1000rpm) and the output torque of the motor is constant 100Nm, the required power at the motor end is 1000rpm 100 Nm/9550-10.47 kW, and the required power sent to the wireless charging device is 50kW +10.47 kW-60.47 kW.
Therefore, in order to guarantee the overall safety of the vehicle, the wireless charging equipment is used as a part to be uniformly controlled, whether the wireless charging equipment works or not is controlled through a working mode, the maximum output power which can be provided currently and the current working state of the equipment are monitored, and then the charging power is requested to the wireless charging equipment according to the real-time state (including the battery state, the required driving power of the whole vehicle, the required power of electric accessories and the like) of the whole vehicle.
In addition, during the actual operation of the vehicle, the above-mentioned various detection information, for example: the voltage of the power battery may change in real time, so that the vehicle controller needs to calculate the current required power of the vehicle in real time according to the information detected in real time. In addition, in the process, information such as output power, output voltage and output current of the wireless charging equipment is monitored as judgment conditions of abnormal conditions.
Several special cases and handling procedures in failure mode are given below:
1. when the wireless charging equipment does not correctly respond to the operating mode instruction of the whole vehicle, the whole vehicle can perform corresponding processing according to different operating states, for example, when the whole vehicle sends the operating mode instruction of constant-current charging, if the state fed back by the equipment is constant-voltage charging, the charging process is judged to enter the tail end and is not processed, but if the feedback is shutdown, the output request power of the whole vehicle is reduced to 0, and meanwhile, the operating mode instruction also can be correspondingly changed.
2. When a wireless charging device has a serious fault and any device such as a vehicle driving away from a ground transmitting terminal can not provide power, a stop working instruction is fed back, but for the less serious fault, the whole vehicle is only used for monitoring, and the utilization rate of the device is improved to the maximum extent on the premise of not influencing the safety of the vehicle.
3. When the whole vehicle judges that the wireless charging equipment does not need to work continuously, the equipment responds to a whole vehicle instruction, namely responds to a shutdown instruction, and the safety of the whole vehicle layer is ensured.
4. The vehicle control unit can also receive the output power of the wireless charging device in real time, and after the vehicle control unit monitors that the output power of the wireless charging device is larger than the request power sent by the vehicle control unit and reaches a set range (namely when the output power of the wireless charging device is larger than the request power sent by the vehicle control unit and the error value of the output power and the request power is larger than a set threshold value), the vehicle control unit forcibly outputs a stop instruction to the wireless charging device. Moreover, if the situation appears at least twice continuously in a certain set time period, the wireless charging equipment is output and controlled to be powered off at low voltage, and a fault code is reported, so that the problem of quick positioning is facilitated, and the efficiency is improved.
All the fault judgment is based on the message transmission value, if the communication is abnormal, the whole vehicle controller directly processes the communication according to the shielding wireless charging equipment, and the vehicle is not influenced and directly adopts a power battery as an energy source.
The system manages and controls the wireless charging equipment on the whole vehicle level, can monitor the equipment state of the wireless charging equipment, requests power in real time according to the state of the wireless charging equipment, monitors all parts and ensures the safety of the whole vehicle.
The specific embodiments are given above, but the present invention is not limited to the described embodiments. The basic idea of the present invention lies in the structure of the wireless charging system and the corresponding control process. Variations, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the invention, and still fall within the scope of the invention.
In-vehicle charging device embodiment
The present embodiment provides an in-vehicle charging device for being provided on a vehicle. The vehicle-mounted charging device comprises a control module, a voltage detection module and a current detection module, wherein the voltage detection module is used for detecting the voltage of the power battery, the current detection module is used for detecting the maximum allowable charging current of the power battery, the detection signal output end of the voltage detection module and the detection signal output end of the current detection module are connected with the detection signal input end of the control module, the control module calculates the maximum allowable charging power of the power battery according to the voltage of the power battery and the maximum allowable charging current, and outputs corresponding request power to the transmitting device, so that the transmitting device outputs corresponding power according to the request power to charge the vehicle.
Since the structure, the operation principle and the process of the vehicle-mounted charging device have been described in detail in the above-mentioned embodiment of the wireless charging system, the embodiment will not be described in detail.
Embodiment of New energy automobile
The embodiment provides a new energy automobile, for example: pure electric vehicles or hybrid electric vehicles are provided with the on-vehicle charging subsystem in this new energy automobile. The vehicle-mounted charging subsystem is the receiving device in the above embodiment of the wireless charging system, and since the structure, the operating principle, and the process of the receiving device have been described in detail in the above embodiment of the wireless charging system, this embodiment will not be described in detail.
Claims (18)
1. A wireless charging system comprises a transmitting device and a receiving device, wherein the transmitting device comprises a transmitting end charging circuit, the receiving device comprises a control module and a receiving end charging circuit, and the wireless charging system is characterized by further comprising a voltage detection module for detecting the voltage of a power battery and a current detection module for detecting the maximum allowable charging current of the power battery, the detection signal output end of the voltage detection module and the detection signal output end of the current detection module are connected with the detection signal input end of the control module, the control module calculates the maximum allowable charging power of the power battery according to the voltage of the power battery and the maximum allowable charging current, the control module outputs corresponding request power to the transmitting device, and the transmitting device outputs corresponding power according to the request power to charge a vehicle;
the receiving device further comprises an accelerator pedal opening detection module, a detection signal output end of the accelerator pedal opening detection module is connected with a detection signal input end of the control module, and the control module obtains corresponding required power according to opening information of the accelerator pedal.
2. The wireless charging system according to claim 1, wherein the receiving device further comprises a motor demand power detection module for detecting a demand power of the driving motor, a detection signal output end of the motor demand power detection module is connected to a detection signal input end of the control module, the control module outputs a corresponding requested power to the transmitting device according to the maximum allowable charging power and the demand power of the driving motor, and the transmitting device outputs a corresponding power according to the requested power.
3. The wireless charging system according to claim 1 or 2, wherein the control module receives the output power of the transmitting device in real time, and when it is monitored that the output power of the transmitting device is greater than the requested power sent by the control module and an error value between the output power and the requested power is greater than a set threshold value, the control module outputs a stop instruction to the transmitting device.
4. The wireless charging system according to claim 1 or 2, wherein after the vehicle is powered on, the control module sends an operating mode standby instruction to the transmitting device, the requested power is zero, and after the transmitting device feeds back a corresponding instruction, the control module sends an operating mode instruction of constant voltage charging or constant current charging to the transmitting device and sends a corresponding requested power to the transmitting device.
5. The wireless charging system according to claim 2, wherein the motor required power detection module includes a motor rotation speed detection unit and a motor output torque detection unit.
6. The wireless charging system according to claim 1, 2 or 5, wherein the receiving device further comprises an electrical accessory demand power detection module for detecting a vehicle electrical accessory demand power, and a detection signal output end of the electrical accessory demand power detection module is connected with a detection signal input end of the control module.
7. A vehicle-mounted charging device comprises a control module, and is characterized by further comprising a voltage detection module for detecting the voltage of a power battery and a current detection module for detecting the maximum allowable charging current of the power battery, wherein the detection signal output end of the voltage detection module and the detection signal output end of the current detection module are connected with the detection signal input end of the control module;
the vehicle-mounted charging device further comprises an accelerator pedal opening detection module, a detection signal output end of the accelerator pedal opening detection module is connected with a detection signal input end of the control module, and the control module obtains corresponding required power according to opening information of the accelerator pedal.
8. The vehicle-mounted charging device according to claim 7, further comprising a motor demand power detection module for detecting a demand power of the driving motor, wherein a detection signal output end of the motor demand power detection module is connected to a detection signal input end of the control module, and the control module outputs a corresponding requested power to the transmitting device according to the maximum allowable charging power and the demand power of the driving motor, so that the transmitting device outputs a corresponding power according to the requested power.
9. The vehicle-mounted charging device according to claim 7 or 8, wherein the control module receives the output power of the transmitting device in real time, and when it is monitored that the output power of the transmitting device is greater than the requested power sent by the control module and an error value between the output power and the requested power is greater than a set threshold value, the control module outputs a stop instruction to the transmitting device.
10. The vehicle-mounted charging device according to claim 7 or 8, wherein after the vehicle is powered on, the control module sends an operating mode standby instruction to the transmitting device, the requested power is zero, and after the transmitting device feeds back a corresponding instruction, the control module sends an operating mode instruction of constant voltage charging or constant current charging to the transmitting device and sends a corresponding requested power to the transmitting device.
11. The vehicle-mounted charging device according to claim 8, wherein the motor required power detection module includes a motor rotation speed detection unit and a motor output torque detection unit.
12. The vehicle-mounted charging device according to claim 7, 8 or 11, further comprising an electrical accessory power demand detection module for detecting a power demand of the vehicle electrical accessory, wherein a detection signal output end of the electrical accessory power demand detection module is connected to a detection signal input end of the control module.
13. A new energy automobile comprises a vehicle-mounted charging subsystem, wherein the vehicle-mounted charging subsystem comprises a control module and a receiving end charging circuit and is characterized by further comprising a voltage detection module for detecting the voltage of a power battery and a current detection module for detecting the maximum allowable charging current of the power battery, the detection signal output end of the voltage detection module and the detection signal output end of the current detection module are connected with the detection signal input end of the control module, the control module calculates the maximum allowable charging power of the power battery according to the voltage of the power battery and the maximum allowable charging current, and the control module outputs corresponding request power to a transmitting device so that the transmitting device outputs corresponding power according to the request power to charge the vehicle;
the vehicle-mounted charging subsystem further comprises an accelerator pedal opening detection module, a detection signal output end of the accelerator pedal opening detection module is connected with a detection signal input end of the control module, and the control module obtains corresponding required power according to opening information of an accelerator pedal.
14. The new energy automobile of claim 13, wherein the vehicle-mounted charging subsystem further comprises a motor required power detection module for detecting a required power of the driving motor, a detection signal output end of the motor required power detection module is connected to a detection signal input end of the control module, and the control module outputs a corresponding requested power to the transmitting device according to the maximum allowable charging power and the required power of the driving motor, so that the transmitting device outputs a corresponding power according to the requested power.
15. The new energy automobile as claimed in claim 13 or 14, wherein the control module receives the output power of the transmitting device in real time, and when it is monitored that the output power of the transmitting device is greater than the requested power sent by the control module and an error value between the output power and the requested power is greater than a set threshold value, the control module outputs a stop instruction to the transmitting device.
16. The new energy automobile as claimed in claim 13 or 14, wherein after the vehicle is powered on, the control module sends an operating mode standby instruction to the transmitting device, the requested power is zero, and after the transmitting device feeds back a corresponding instruction, the control module sends an operating mode instruction of constant voltage charging or constant current charging to the transmitting device and sends a corresponding requested power to the transmitting device.
17. The new energy automobile as claimed in claim 14, wherein the motor required power detection module includes a motor rotation speed detection unit and a motor output torque detection unit.
18. The new energy automobile as claimed in claim 13, 14 or 17, wherein the vehicle-mounted charging subsystem further comprises an electrical accessory power demand detection module for detecting vehicle electrical accessory power demand, and a detection signal output end of the electrical accessory power demand detection module is connected with a detection signal input end of the control module.
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| CN104518250B (en) * | 2013-09-27 | 2019-10-22 | 南京中兴软件有限责任公司 | A kind of automobile wireless charging method and device |
| CN103532256B (en) * | 2013-10-31 | 2016-09-14 | 武汉大学 | A kind of novel radio power transfer |
| CN104638694B (en) * | 2013-11-11 | 2018-01-23 | 比亚迪股份有限公司 | Wireless charging system and method for electric automobile to electric automobile |
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