CN113428097A - Multi-source vehicle-mounted BMS system - Google Patents
Multi-source vehicle-mounted BMS system Download PDFInfo
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- CN113428097A CN113428097A CN202110760561.1A CN202110760561A CN113428097A CN 113428097 A CN113428097 A CN 113428097A CN 202110760561 A CN202110760561 A CN 202110760561A CN 113428097 A CN113428097 A CN 113428097A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
- B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
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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
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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
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/10—Dynamic electric regenerative braking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
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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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for 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
- Y02T90/14—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 discloses a multi-source vehicle-mounted BMS system, which comprises: the system comprises a BMS battery management unit, a kinetic energy recovery unit, a wireless charging unit, an energy storage unit, a communication unit and a monitoring unit; the invention not only recovers the braking kinetic energy through the kinetic energy recovery unit, but also adds the wireless charging unit, and can charge the energy storage unit through the high-voltage power transmission line or the wireless charging base station, thereby not only improving the energy recovery efficiency, but also effectively improving the power output.
Description
Technical Field
The invention belongs to the field of vehicle-mounted communication command, and particularly relates to a multi-source vehicle-mounted BMS system.
Background
The vehicle-mounted communication command system is widely applied to various industries such as governments, public security, armed police, fire control, civil defense, water conservancy flood prevention, electric power emergency rescue, sea supervision and patrol and the like at present, and is suitable for real-time mobile transmission of information in a complex environment. Under severe geographic conditions and dangerous environments, the emergency communication system can arrive at the scene and transmit the scene images at the first time, and is a key for ensuring timely and efficient completion of emergency communication tasks under special environments. The vehicle-mounted BMS system can carry out uninterrupted power supply for the vehicle-mounted communication command system through the energy storage of the lithium battery, and the defects of high noise, environmental pollution, poor safety performance and the like in the working process of the traditional mobile power supply vehicle are effectively overcome.
The vehicle-mounted communication command system puts high demands on a power supply system due to the particularity of the use environment, and the current commonly used power supply modes include the following modes: the power is supplied by the original vehicle storage battery, the storage battery is additionally arranged for supplying power, the engine is powered by the engine, and the generator is additionally arranged for supplying power.
The current existing power supply technology of the vehicle-mounted communication command system has the following defects:
1. power supply by primary vehicle accumulator
The method is characterized in that the original vehicle storage battery is used for simply supplying power for the vehicle-mounted communication monitoring system, the vehicle-mounted communication monitoring system can be normally used under the condition that the power requirement of the communication and monitoring module is low, if more equipment has high power requirement, the original vehicle storage battery is insufficient in power due to the fact that the output power of the original vehicle cannot meet the service power of the equipment, the starting performance of a vehicle is affected, and the service requirement of large high-power equipment cannot be met by the method.
2. With additional accumulator for power supply
The scheme developed in the mode of supplying power by using the original vehicle storage battery supplies power by additionally installing the backup storage battery, the vehicle-mounted communication monitoring system is supplied with power by the stored energy of the backup storage battery, and the system cannot work when the stored energy of the backup storage battery is exhausted.
3. Power take-off and power supply for engine
The method is characterized in that a power take-off generator is additionally arranged on an engine of a vehicle, and power is generated by utilizing redundant power of the engine to supply power for a vehicle-mounted communication command system.
4. Additionally provided with a generator for supplying power
The vehicle is additionally provided with the generator to supply power for the vehicle-mounted communication command system, so that the problems of large modification amount, too much occupied space, overweight and the like easily exist, the generator is required to be well cooled when in use, the heat of the generator is difficult to dissipate due to negative pressure during high-speed running of the vehicle, the generator is easy to overheat and protect, and the generator can be used basically only in a state that the vehicle is stopped or runs at a low speed.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a multi-source vehicle-mounted BMS system, which can supply power to a vehicle-mounted communication command system by recovering kinetic energy during the driving of a vehicle and supplementing power through a high voltage power line and a wireless charging base station during the driving, and which can satisfy the requirements of large power, small occupied space, light weight, use during the driving, and applicability to various vehicle types, by using an energy recovery technology and a wireless charging technology.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the invention discloses a multi-source vehicle-mounted BMS system, which comprises: the system comprises a BMS battery management unit, a kinetic energy recovery unit, a wireless charging unit, an energy storage unit, a communication unit and a monitoring unit;
the BMS battery management unit is used for monitoring kinetic energy recovery, detecting a wireless charging state, monitoring a communication unit and controlling the operation of the monitoring unit;
the kinetic energy recovery unit is used for recovering the surplus energy output by the vehicle engine in the running process and the kinetic energy wasted in braking, and converting the recovered energy into electric energy to be stored in the energy storage unit;
the wireless charging unit is used for acquiring electric energy from a high-voltage transmission line or a wireless charging base station and charging the energy storage unit;
the energy storage unit is used for storing the electric energy supplied by the kinetic energy recovery unit and the wireless charging unit and supplying energy to the outside under the control of the BMS battery management unit;
the monitoring unit is used for acquiring the working state information of the kinetic energy recovery unit and the wireless charging unit in real time and the information of electric quantity, voltage, current, power and temperature of each energy storage element in the energy storage unit;
and the communication unit is used for transmitting the information collected by the monitoring unit to the BMS battery management system and sending the instruction signal of the BMS battery management unit to the kinetic energy recovery unit, the wireless charging unit and the energy storage unit.
Further, the kinetic energy recovery unit includes: hydraulic brakes, hydraulic sensors and motor-generators; the hydraulic brake provides braking for the vehicle; the hydraulic sensor detects the braking state of the vehicle through hydraulic pressure change; the motor-generator has two modes of operation: the motor mode provides auxiliary power for the vehicle engine, and the generator mode converts kinetic energy of the vehicle during braking into electric energy to be stored in the energy storage unit.
Upon vehicle start-up, the motor-generator operates in a motor mode to assist in starting the vehicle engine; in the acceleration process of the vehicle, the electric energy in the energy storage unit is converted into mechanical energy to provide auxiliary power for a vehicle engine; when the vehicle brakes, a brake signal is detected through a hydraulic sensor, braking is carried out through a hydraulic brake, and meanwhile, the mode is switched to a generator mode (namely the mode is converted from an electric motor to a generator), so that kinetic energy is converted into electric energy to be stored in an energy storage unit.
Further, the motor-generator is connected with a crankshaft in a vehicle engine; the motor-generator is a brushless motor comprising: the excitation device is used for generating a magnetic field for generating power when a vehicle is braked, and the rotor is connected with the crankshaft and driven by the crankshaft to rotate; the motor-generator is also provided with a travel switch for controlling the excitation device to be switched on and switched off, the travel switch is arranged below the brake pedal, and the excitation device is switched on when the brake pedal is stepped on and the travel switch is touched.
The starting of the excitation device is controlled by a brake, when the motor-generator runs, a rotor of the motor-generator is driven by a crankshaft to rotate, when the excitation device is not started, a working magnetic field cannot be generated, the motor-generator cannot normally run, and at the moment, the motor-generator cannot convert kinetic energy into electric energy and does not consume the kinetic energy of the motor-generator; when the vehicle brakes, the brake pedal is stepped down to touch the travel switch, the excitation device is turned on to generate a working magnetic field, the motor-generator starts to normally run to convert kinetic energy generated by the idling of the motor-generator into electric energy, the excitation device is turned off when the brake pedal is released, and the motor-generator stops converting the kinetic energy into the electric energy; the motor-generator generates electricity by power output generated when the vehicle is braked, is started when the vehicle is braked, and converts kinetic energy output by a vehicle engine when the vehicle is braked into electric energy and stores the electric energy in the energy storage unit. The kinetic energy recovery unit has the characteristics of less starting times and high instantaneous power. Compared with the prior art, the kinetic energy recovery unit recovers the kinetic energy of the vehicle engine during braking, not only improves the energy recovery efficiency, but also effectively improves the power output, and has the technical advantages of large power, small occupied space, light weight, use in advancing and suitability for various vehicle types.
Further, the wireless charging unit adopts a magnetic resonance wireless charging technology, including: a transmitting-side device and a receiving-side device; the transmitting-side apparatus includes: the device comprises a transmitting side rectifying filter circuit, a high-frequency inverter circuit, a primary side series resonance circuit and a transmitting coil; the receiving side apparatus includes: the receiving coil, the electronic capacitor circuit, the receiving side rectifying and filtering circuit and the DC-DC converter are connected in series;
electric energy provided from a high-voltage transmission line or a wireless charging base station passes through a transmitting side rectifying and filtering circuit, a high-frequency inverter circuit, a primary side series resonance circuit and a transmitting coil, a resonant magnetic field is generated by using a high-frequency constant amplitude alternating magnetic field generating device, and the electric energy wirelessly transmitted is received by a receiving coil, an electronic capacitor circuit, a receiving side rectifying and filtering circuit and a DC-DC converter and is transmitted to an energy storage unit, so that long-distance charging is realized.
The wireless charging technology can support one-to-many synchronous communication, and simultaneously has the functions of over-temperature, overvoltage, overcurrent protection and foreign matter detection. The carrier used in the technology is a space magnetic field, so that energy can not be emitted like electromagnetic waves, and radiation damage to human bodies can not be caused.
Furthermore, the energy storage unit is composed of one or more of a lead-acid storage battery, a nickel-metal hydride battery, a lithium battery and a super capacitor, and can be configured according to requirements, so that the requirements on various technical parameters such as power, voltage, service life, energy storage efficiency, power density and capacity density in different states are met.
Furthermore, the communication unit consists of an RS-485 module, an RS-232 module and a Bluetooth module.
Furthermore, the monitoring unit is composed of a battery electric quantity sensor, a battery current sensor, a battery voltage sensor, a battery power sensor, a battery temperature sensor, a kinetic energy recovery unit state monitoring sensor and a wireless charging unit state monitoring sensor.
The invention has the beneficial effects that:
1. the combined application of the kinetic energy recovery technology and the wireless charging technology is as follows: the brake kinetic energy is recovered through the kinetic energy recovery unit, the wireless charging unit is additionally arranged, the energy storage unit can be charged through the high-voltage power transmission line or the wireless charging base station, the energy recovery efficiency is improved, the power output can be effectively improved, and compared with the prior art, the energy storage device has the technical advantages of being large in energy supply power, small in occupied space, light in weight, suitable for various vehicle types and used in traveling.
2. The energy storage unit is formed by combining multiple energy storage elements: the characteristics of high power density of the super capacitor and high energy density of the lithium battery are combined, and the respective characteristics (low cost and easy replacement) of the lead-acid storage battery are supplemented, so that the super capacitor and the lithium battery can be connected in parallel through unified management of the power management module, the super capacitor is used as a power transition module between the lithium battery and the motor, the influence of high-power charging and discharging on the service life of the lithium battery is reduced, and the full storage of energy recovered by an energy recovery technology can be ensured.
3. Unified master control unit: the BMS battery management system can be used as a main control unit of the whole system in a vehicle-mounted system, and a main control unit additionally arranged for the communication module and the monitoring module is omitted, so that the main control unit in the whole system can monitor the state information of the vehicle, can effectively monitor the state information of the communication equipment and the monitoring equipment additionally arranged in the later period, and really plays a role in monitoring and controlling the whole system of the whole vehicle.
Drawings
Fig. 1 is a schematic diagram of the architecture of a system in an example of the invention.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.
Referring to fig. 1, in an example, a multi-source vehicle-mounted BMS system of the present invention includes: the system comprises a BMS battery management unit, a kinetic energy recovery unit, a wireless charging unit, an energy storage unit, a communication unit and a monitoring unit;
the BMS battery management unit is used for monitoring kinetic energy recovery, detecting a wireless charging state, monitoring a communication unit and controlling the operation of the monitoring unit;
the kinetic energy recovery unit is used for recovering the surplus energy output by the vehicle engine in the running process and the kinetic energy wasted in braking, and converting the recovered energy into electric energy to be stored in the energy storage unit;
the wireless charging unit is used for acquiring electric energy from a high-voltage transmission line or a wireless charging base station and charging the energy storage unit;
the energy storage unit is used for storing the electric energy supplied by the kinetic energy recovery unit and the wireless charging unit and supplying energy to the outside under the control of the BMS battery management unit;
the monitoring unit is used for acquiring the working state information of the kinetic energy recovery unit and the wireless charging unit in real time and the information of electric quantity, voltage, current, power and temperature of each energy storage element in the energy storage unit;
and the communication unit is used for transmitting the information collected by the monitoring unit to the BMS battery management system and sending the instruction signal of the BMS battery management unit to the kinetic energy recovery unit, the wireless charging unit and the energy storage unit.
In a preferred example, the kinetic energy recovery unit includes: hydraulic brakes, hydraulic sensors and motor-generators; the hydraulic brake provides braking for the vehicle; the hydraulic sensor detects the braking state of the vehicle through hydraulic pressure change; the motor-generator has two modes of operation: the motor mode provides auxiliary power for the vehicle engine, and the effect is obvious when the vehicle is started or accelerated; the generator mode converts kinetic energy of the vehicle during braking into electric energy to be stored in the energy storage unit.
Upon vehicle start-up, the motor-generator operates in a motor mode to assist in starting the engine; in the acceleration process of the vehicle, the electric energy in the energy storage unit is converted into mechanical energy to provide auxiliary power for the vehicle engine, and the effect is obvious when the vehicle is started or accelerated; when the vehicle brakes, a brake signal is detected through a hydraulic sensor, braking is carried out through a hydraulic brake, and meanwhile, the mode is switched to a generator mode (namely the mode is converted from an electric motor to a generator), so that kinetic energy is converted into electric energy to be stored in an energy storage unit.
In a preferred example, the motor-generator is connected to a crankshaft in an engine of a vehicle; the motor-generator is a brushless motor comprising: the excitation device is used for generating a magnetic field for generating power when a vehicle is braked, and the rotor is connected with the crankshaft and driven by the crankshaft to rotate; the motor-generator is also provided with a travel switch for controlling the excitation device to be switched on and switched off, the travel switch is arranged below the brake pedal, and the excitation device is switched on when the brake pedal is stepped on and the travel switch is touched.
The starting of the excitation device is controlled by a brake, when the motor-generator runs, a rotor of the motor-generator is driven by a crankshaft to rotate, when the excitation device is not started, a working magnetic field cannot be generated, the motor-generator cannot normally run, and at the moment, the motor-generator cannot convert kinetic energy into electric energy and does not consume the kinetic energy of the motor-generator; when the vehicle brakes, the brake pedal is stepped down to touch the travel switch, the excitation device is turned on to generate a working magnetic field, the motor-generator starts to normally run to convert kinetic energy generated by the idling of the motor-generator into electric energy, the excitation device is turned off when the brake pedal is released, and the motor-generator stops converting the kinetic energy into the electric energy; the motor-generator generates electricity by power output generated when the vehicle is braked, is started when the vehicle is braked, and converts kinetic energy output by a vehicle engine when the vehicle is braked into electric energy and stores the electric energy in the energy storage unit. The kinetic energy recovery unit has the characteristics of less starting times and high instantaneous power. Compared with the prior art, the kinetic energy recovery unit recovers the kinetic energy of the vehicle engine during braking, not only improves the energy recovery efficiency, but also effectively improves the power output, and has the technical advantages of large power, small occupied space, light weight, use in advancing and suitability for various vehicle types.
In a preferred example, the wireless charging unit adopts a magnetic resonance wireless charging technology, and includes: a transmitting-side device and a receiving-side device; the transmitting-side apparatus includes: the device comprises a transmitting side rectifying filter circuit, a high-frequency inverter circuit, a primary side series resonance circuit and a transmitting coil; the receiving side apparatus includes: the device comprises a receiving coil, an electronic capacitor circuit, a receiving side rectifying and filtering circuit and a DC-DC converter.
Electric energy provided from a high-voltage transmission line or a wireless charging base station passes through a transmitting side rectifying and filtering circuit, a high-frequency inverter circuit, a primary side series resonance circuit and a transmitting coil, a resonant magnetic field is generated by using a high-frequency constant amplitude alternating magnetic field generating device, and the electric energy wirelessly transmitted is received by a receiving coil, an electronic capacitor circuit, a receiving side rectifying and filtering circuit and a DC-DC converter and is transmitted to an energy storage unit, so that long-distance charging is realized.
The wireless charging technology can support one-to-many synchronous communication, and simultaneously has the functions of over-temperature, overvoltage, overcurrent protection and foreign matter detection. The carrier used in the technology is a space magnetic field, so that energy can not be emitted like electromagnetic waves, and radiation damage to human bodies can not be caused.
In a preferred example, the energy storage unit is composed of one or more of a lead-acid storage battery, a nickel-metal hydride battery, a lithium battery and a super capacitor, and can be configured according to requirements, so that the requirements on various technical parameters such as power, voltage, service life, energy storage efficiency, power density and capacity density in different states are met.
In a preferred example, the communication unit consists of an RS-485 module, an RS-232 module and a Bluetooth module.
In a preferred example, the monitoring unit is composed of a battery level sensor, a battery current sensor, a battery voltage sensor, a battery power sensor, a battery temperature sensor, a kinetic energy recovery unit state monitoring sensor, and a wireless charging unit state monitoring sensor.
The working principle of the system of the invention is as follows: the kinetic energy recovery unit and the wireless charging unit are two large energy sources of the system, the kinetic energy recovery unit recovers braking kinetic energy, and the wireless charging unit receives electric energy transmitted by a high-voltage power transmission line or a wireless charging base station and stores the energy in the energy storage unit; the energy storage unit is formed by combining multiple energy storage elements, combines the characteristics of high power density of a super capacitor and high energy density of a lithium battery, and is used for storing energy provided by the kinetic energy recovery unit and the wireless charging unit and releasing the energy when necessary by assisting the respective characteristics (low cost and easy replacement) of the lead-acid storage battery; the monitoring unit is used for acquiring the working state information of the kinetic energy recovery unit and the wireless charging unit in real time and the information of electric quantity, voltage, current, power and temperature of each energy storage element in the energy storage unit; the energy storage unit is used for transmitting the information acquired by the monitoring unit to the BMS battery management system and sending the instruction signal of the BMS battery management unit to the kinetic energy recovery unit, the wireless charging unit and the energy storage unit; the BMS battery management unit is used for monitoring kinetic energy recovery, detecting a wireless charging state, monitoring a communication unit and controlling the operation of the monitoring unit.
While the invention has been described in terms of its preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (8)
1. A multi-source on-board BMS system, comprising: the system comprises a BMS battery management unit, a kinetic energy recovery unit, a wireless charging unit, an energy storage unit, a communication unit and a monitoring unit;
the BMS battery management unit is used for monitoring kinetic energy recovery, detecting a wireless charging state, monitoring a communication unit and controlling the operation of the monitoring unit;
the kinetic energy recovery unit is used for recovering the surplus energy output by the vehicle engine in the running process and the kinetic energy wasted in braking, and converting the recovered energy into electric energy to be stored in the energy storage unit;
the wireless charging unit is used for acquiring electric energy from a high-voltage transmission line or a wireless charging base station and charging the energy storage unit;
the energy storage unit is used for storing the electric energy supplied by the kinetic energy recovery unit and the wireless charging unit and supplying energy to the outside under the control of the BMS battery management unit;
the monitoring unit is used for acquiring the working state information of the kinetic energy recovery unit and the wireless charging unit in real time and the information of electric quantity, voltage, current, power and temperature of each energy storage element in the energy storage unit;
and the communication unit is used for transmitting the information collected by the monitoring unit to the BMS battery management system and sending the instruction signal of the BMS battery management unit to the kinetic energy recovery unit, the wireless charging unit and the energy storage unit.
2. The multi-source vehicle-mounted BMS system according to claim 1, wherein the kinetic energy recovery unit comprises: hydraulic brakes, hydraulic sensors and motor-generators; the hydraulic brake provides braking for the vehicle; the hydraulic sensor detects the braking state of the vehicle through hydraulic pressure change; the motor-generator has two modes of operation: the motor mode provides auxiliary power for the vehicle engine, and the generator mode converts kinetic energy of the vehicle during braking into electric energy to be stored in the energy storage unit.
3. The multi-source on-board BMS system of claim 2, wherein at vehicle start-up, the motor-generator operates in a motor mode to assist in starting the vehicle engine; in the acceleration process of the vehicle, the electric energy in the energy storage unit is converted into mechanical energy to provide auxiliary power for a vehicle engine; when the vehicle brakes, a brake signal is detected through a hydraulic sensor, braking is carried out through a hydraulic brake, and meanwhile, the mode is switched to a generator mode (namely the mode is converted from an electric motor to a generator), so that kinetic energy is converted into electric energy to be stored in an energy storage unit.
4. The multi-source on-board BMS system according to claim 2, characterized in that the motor-generator is connected to a crankshaft in a vehicle engine; the motor-generator is a brushless motor comprising: the excitation device is used for generating a magnetic field for generating power when a vehicle is braked, and the rotor is connected with the crankshaft and driven by the crankshaft to rotate; the motor-generator is also provided with a travel switch for controlling the excitation device to be switched on and switched off, the travel switch is arranged below the brake pedal, and the excitation device is switched on when the brake pedal is stepped on and the travel switch is touched.
5. The multi-source on-board BMS system of claim 1, wherein the wireless charging unit employs a magnetic resonance wireless charging technology comprising: a transmitting-side device and a receiving-side device; the transmitting-side apparatus includes: the device comprises a transmitting side rectifying filter circuit, a high-frequency inverter circuit, a primary side series resonance circuit and a transmitting coil; the receiving side apparatus includes: the receiving coil, the electronic capacitor circuit, the receiving side rectifying and filtering circuit and the DC-DC converter; electric energy provided from a high-voltage transmission line or a wireless charging base station passes through a transmitting side rectifying and filtering circuit, a high-frequency inverter circuit, a primary side series resonance circuit and a transmitting coil, a resonant magnetic field is generated by using a high-frequency constant amplitude alternating magnetic field generating device, and the electric energy wirelessly transmitted is received by a receiving coil, an electronic capacitor circuit, a receiving side rectifying and filtering circuit and a DC-DC converter and is transmitted to an energy storage unit, so that long-distance charging is realized.
6. The multi-source vehicle-mounted BMS system according to claim 1, wherein the energy storage unit is composed of one or more of a lead-acid battery, a nickel-metal hydride battery, a lithium battery and a super capacitor, and can be configured according to requirements to meet technical parameter requirements of power, voltage, service life, energy storage efficiency, power density, capacity density and the like under different states.
7. The multi-source vehicle-mounted BMS system according to claim 1, wherein the communication unit is comprised of an RS-485 module, an RS-232 module, a Bluetooth module.
8. The multi-source vehicle-mounted BMS system according to claim 1, wherein the monitoring unit is comprised of a battery level sensor, a battery current sensor, a battery voltage sensor, a battery power sensor, a battery temperature sensor, a kinetic energy recovery unit state monitoring sensor, a wireless charging unit state monitoring sensor.
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