CN110940532A - Vehicle energy flow testing system and method - Google Patents
Vehicle energy flow testing system and method Download PDFInfo
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- CN110940532A CN110940532A CN201911292431.9A CN201911292431A CN110940532A CN 110940532 A CN110940532 A CN 110940532A CN 201911292431 A CN201911292431 A CN 201911292431A CN 110940532 A CN110940532 A CN 110940532A
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- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
Abstract
The invention provides a whole vehicle energy flow testing system and method, and relates to the technical field of whole vehicle energy flow testing. The finished automobile energy flow testing system comprises an upper computer and a data acquisition unit in communication connection with the upper computer, wherein the data acquisition unit is used for synchronously acquiring and recording real-time data of a plurality of subsystems of a finished automobile and transmitting the real-time data to the upper computer. The upper computer is used for receiving and monitoring real-time data so as to obtain the whole vehicle-level energy flow. The whole vehicle energy flow test system can realize the whole vehicle-level energy flow test, and understand and analyze the energy flow condition of the whole vehicle under different use environments and different use working conditions, so that a basis and a support are provided for the efficiency optimization of each system and each component of the whole vehicle and the reduction of the energy consumption rate of the whole vehicle, the integration matching capability of the whole vehicle system is improved, and the whole vehicle framework and the whole vehicle control strategy are optimized.
Description
Technical Field
The invention relates to the technical field of finished automobile energy flow, in particular to a finished automobile energy flow testing system and method.
Background
The existing pure electric vehicle energy flow test is limited, the test is mostly limited to local test of each subsystem, the flow distribution and energy loss condition of the whole vehicle-level energy flow and the mutual influence among all the systems of the whole vehicle can not be systematically reflected, the influence of the mutual action among all the subsystems of the whole vehicle on the energy consumption of the whole vehicle can not be accurately considered in the development work of whole vehicle energy management and energy consumption optimization, and the optimization basis and the corresponding optimization scheme are not convenient to be well provided for the whole vehicle integration matching optimization.
Disclosure of Invention
The invention aims to provide a finished automobile energy flow testing system and a finished automobile energy flow testing method, which can realize the energy flow testing of a finished automobile level, and understand and analyze the energy flow conditions of the finished automobile under different use environments and different use working conditions, thereby providing a basis and a support for the efficiency optimization of each system and each component of the finished automobile and the reduction of the energy consumption rate of the finished automobile, improving the integration matching capability of the finished automobile system, and optimizing the finished automobile framework and the finished automobile control strategy.
Embodiments of the invention may be implemented as follows:
in a first aspect, the embodiment provides a complete vehicle energy flow testing system, which includes an upper computer and a data acquisition unit connected with the upper computer, where the data acquisition unit is used for connecting with multiple subsystems of a complete vehicle, synchronously acquiring and recording real-time data of the multiple subsystems, and transmitting the real-time data to the upper computer; and the upper computer is used for receiving and monitoring the real-time data so as to obtain the whole vehicle-level energy flow of the vehicle.
In an alternative embodiment, the data acquisition unit comprises a sensor and a chassis dynamometer; and the upper computer is respectively connected with the sensor and the chassis dynamometer.
In an alternative embodiment, the plurality of subsystems includes a power system, an electrical system, a cooling system, and a thermal management system; the sensors comprise a voltage sensor and a current sensor, and the voltage sensor and the current sensor are respectively arranged on the electrical system, the power system, the cooling system and the thermal management system to test voltage and current.
In an alternative embodiment, the power system includes a power battery and a motor controller; the voltage sensor and the current sensor are respectively arranged on a power battery of a vehicle to test the voltage and the current of the power battery, and are respectively arranged on the input end and the output end of the motor controller to test the voltage and the current of the input end of the motor controller and the voltage and the current of the output end of the motor controller;
the electrical system comprises a DC/DC transformer, and the voltage sensor and the current sensor are respectively arranged at the input end and the output end of the DC/DC transformer so as to test the voltage and the current of the input end and the output end of the DC/DC transformer;
the cooling system comprises an air conditioner, a cooling water pump and an electronic fan; the voltage sensor and the current sensor are respectively arranged at the input end of a compressor of the air conditioner, the input end of a PTC (positive temperature coefficient) of the air conditioner, the input end of a cooling water pump and the input end of an electronic fan so as to test the voltage and the current of the air conditioner, the cooling water pump and the electronic fan;
the heat management system comprises a battery heat management system, and the voltage sensor and the current sensor are respectively arranged at the PTC input end of the battery heat management system to test the voltage and the current at the PTC input end of the battery heat management system.
In an alternative embodiment, the plurality of subsystems includes a power system, an electrical system, a cooling system, and a thermal management system; the sensor includes a power analyzer for connecting the electrical system, the power system, the cooling system, and the thermal management system, respectively.
In an alternative embodiment, the plurality of subsystems includes a power system, an electrical system, a cooling system, and a thermal management system; the sensors comprise temperature sensors respectively arranged in the electric system, the power system, the cooling system and the thermal management system of the vehicle;
the sensor comprises a pressure sensor and a flow sensor, and the pressure sensor and the flow sensor are respectively used for being arranged at the water inlet and the water outlet of a cooling system and a thermal management system of the vehicle.
In an optional embodiment, the chassis dynamometer is used for being connected with wheels of a vehicle to obtain a real-time vehicle speed signal, a loading resistance signal and a wheel work signal of the whole vehicle.
In an alternative embodiment, the torque sensors are arranged at the output shaft ends of the motor, the reducer and the transmission shaft of the vehicle.
In an optional embodiment, the system further comprises an energy flow simulation unit, wherein the energy flow simulation unit is connected with the data acquisition unit; and the data acquisition unit transmits the real-time data to the energy flow simulation unit for calibrating the energy flow of the whole vehicle.
In a second aspect, the method for testing energy flow of a finished automobile provided by this embodiment includes:
debugging an upper computer and a data acquisition unit to realize synchronous acquisition of the whole vehicle data acquisition unit;
collecting and recording energy flow data of the whole vehicle under different use conditions;
monitoring and analyzing real-time changes in the energy flow data;
and acquiring the real-time dynamic efficiency and the working condition efficiency of the whole vehicle.
The invention provides a whole vehicle energy flow testing system and a method, which have the beneficial effects that:
the whole vehicle energy flow testing system synchronously collects and records the real-time data of a plurality of subsystems of the whole vehicle through the data collecting unit and transmits the real-time data to the upper computer. The upper computer receives and monitors the real-time data and the change of the real-time data to obtain the energy flow of the whole vehicle, and analyzes the energy flow condition of the whole vehicle under different use working conditions, so that a basis and a support are provided for the efficiency optimization of each system and each component of the whole vehicle and the reduction of the energy consumption rate of the whole vehicle, the integration matching capability of the whole vehicle system is improved, and the whole vehicle framework and the whole vehicle control strategy are optimized.
The method for testing the energy flow of the whole vehicle can accurately acquire the energy conversion and loss conditions of all parts of each system of the whole vehicle under different working conditions, and obtain the real-time dynamic efficiency and working condition efficiency of all parts. Meanwhile, the number of times of independent testing of energy flows of parts of each system is reduced, the problem of difference between system testing and finished automobile testing is solved, the development cost is saved, and the development cycle of the finished automobile is greatly shortened.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a testing schematic block diagram of a vehicle energy flow testing system according to an embodiment of the present invention;
fig. 2 is a block diagram of a data acquisition unit of a vehicle energy flow testing system according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an energy flow result of a test of a vehicle energy flow test system according to an embodiment of the present invention.
Icon: 100-a whole vehicle energy flow testing system; 110-an upper computer; 121-a torque sensor; 123-temperature sensor; 125-a flow sensor; 127-a pressure sensor; 130-a power analyzer; 131-a power system; 1311-power battery; 132-an electrical system; 133-a cooling system; 134-a thermal management system; 135-chassis dynamometer; 101-a wheel; 141-a transmission shaft; 142-a reducer; 143-a motor controller; 145-drive motor; 147-PCU; 151-DC/DC transformer; 152-a cooling water pump; 153-electronic fan; 154-electric brake pump; 155-passenger compartment; 161-air conditioner PTC; 163-a compressor; 165-charger.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
The energy flow test of the pure electric vehicle is one of important technologies for research and development of the pure electric vehicle, and has important significance in the aspects of complete vehicle energy management, complete vehicle energy consumption optimization, complete vehicle economy and the like of the pure electric vehicle. At present, the research of the pure electric automobile mainly focuses on the aspects of driving range, finished automobile energy consumption rate and the like, and the improvement of the driving range and the reduction of the finished automobile energy consumption rate to the maximum extent become the key of the technical core competitiveness of the pure electric automobile. The good energy consumption performance can not leave the optimization of the energy management of the whole vehicle, the energy flow test of the whole vehicle is an important link of the energy management and optimization of the whole vehicle, and the energy flow test method has important guiding and reference functions in the simulation calibration and optimization of the energy management system of the whole vehicle.
The whole vehicle energy flow analysis is to analyze the energy input and output consumption conditions of all parts of each system from the perspective of a whole vehicle, so as to obtain an energy flow distribution diagram from a power grid to wheels. The whole vehicle energy flow test and the simulation are combined, so that the whole vehicle energy flow optimization can be realized quickly, efficiently and accurately, and the purpose of reducing the whole vehicle energy consumption rate is achieved.
The existing pure electric vehicle energy flow test is limited, the test is mostly limited to local test of each subsystem, the flow distribution and energy loss condition of the whole vehicle-level energy flow and the mutual influence among all the systems of the whole vehicle can not be systematically reflected, and the influence of the mutual action among all the subsystems of the whole vehicle on the energy consumption of the whole vehicle can not be accurately considered in the development work of whole vehicle energy management and energy consumption optimization.
In order to overcome the defects in the prior art, the embodiment provides a system and a method for testing the energy flow of a whole vehicle, which can realize the energy flow test of the whole vehicle level, reflect the flow distribution and energy loss conditions of the energy flow of the whole vehicle level and the mutual influence among all systems of the whole vehicle, and are beneficial to providing an optimization basis for the integrated matching optimization of the whole vehicle and providing a corresponding optimization scheme.
First embodiment
Fig. 1 is a testing schematic block diagram of a vehicle energy flow testing system 100 according to an embodiment of the present invention, please refer to fig. 1.
The embodiment provides a complete vehicle energy flow testing system 100, which comprises an upper computer 110 and a data acquisition unit connected with the upper computer 110, wherein the data acquisition unit is used for being connected with a plurality of subsystems of a complete vehicle, synchronously acquiring and recording real-time data of the subsystems of the complete vehicle, and transmitting the real-time data to the upper computer 110; the upper computer 110 is used for receiving and monitoring real-time data to obtain the whole vehicle-level energy flow. Optionally, the test objects of the vehicle energy flow testing system 100 are a plurality of subsystems of the vehicle, including but not limited to the vehicle's power system 131, electrical system 132, cooling system 133, thermal management system 134, wheels 101, and the like. The power system 131 comprises a power battery 1311, a motor controller 143, a driving motor 145, a speed reducer 142, a transmission shaft 141 and the like; the electrical system 132 includes a DC/DC transformer 151 and the like; thermal management system 134 includes a battery thermal management PTC, etc.; the cooling system 133 includes an air conditioner compressor 163, an air conditioner PTC161, a cooling water pump 152, an electronic fan 153, a cooling pipe, and the like. The plurality of subsystems are electrically or communicatively connected to the upper computer 110, respectively, and are not limited in particular. The data acquisition unit is used for synchronously acquiring and recording real-time data of various parameters, including but not limited to the synchronous acquisition and recording of current, voltage, electric power, rotating speed, torque, mechanical power, temperature, pressure, flow and the like of each subsystem. Real-time data under different environments and different working conditions are collected and sent to the upper computer 110, so that the energy flow test of the whole vehicle level is realized. The system is easy to understand, in the testing process, the changes of all real-time data and the influence caused by the changes can be monitored through the upper computer 110, the real-time relation among different physical quantities such as electric energy, mechanical energy and heat energy can be accurately reflected, and the mutual relation between the physical quantities and the environment working conditions of the whole vehicle can be accurately analyzed, so that the energy flow conditions of the whole vehicle in different use environments and different use working conditions can be known, and a basis and a support are provided for the efficiency optimization of all subsystems and all parts of the whole vehicle and the reduction of the energy consumption rate of the whole vehicle.
Optionally, the data acquisition unit in this embodiment includes sensors and a chassis dynamometer 135. The sensors include, but are not limited to, voltage sensors, current sensors, power analyzer 130, temperature sensors 123, pressure sensors 127, flow sensors 125, and torque sensors 121. The upper computer 110 is respectively connected with a voltage sensor, a current sensor, a power analyzer 130, a chassis dynamometer 135, a temperature sensor 123, a pressure sensor 127, a flow sensor 125 and a torque sensor 121.
Fig. 2 is a block diagram of a data acquisition unit of a vehicle energy flow testing system 100 according to an embodiment of the present invention, and fig. 2 is referred to.
Wherein the letter a in the circle represents a current sensor, the letter V represents a voltage sensor, the letter F represents a flow sensor 125, the letter K represents a temperature sensor 123, the letter P represents a pressure sensor 127, and the letter T represents a torque sensor 121.
In this embodiment, the voltage sensor and the current sensor are respectively connected to the power battery 1311, and are used for testing the current and the voltage of the power battery 1311. The voltage sensor and the current sensor are respectively disposed in the power system 131, and are respectively connected to an input terminal and an output terminal of the motor controller 143, for example, to test the current and the voltage at the input terminal of the motor controller 143 and to test the current and the voltage at the output terminal of the motor controller 143. The voltage sensor and the current sensor are respectively arranged on the electrical system 132, and the electrical system 132 comprises a low-voltage electrical system 132, such as a cooling water pump 152, an electronic fan 153 and the like in the cooling system 133; also included is a high voltage electrical system 132, such as an air conditioning compressor 163, an air conditioning PTC161, and a charger 165. Optionally, a current sensor and a voltage sensor are respectively connected to the DC/DC transformer 151 for testing the current and voltage at the input and output of the DC/DC transformer 151. The voltage sensor and the current sensor are respectively arranged on the cooling system 133, for example, connected with the input end of the air conditioner compressor 163, and used for testing the current and the voltage at the input end of the air conditioner compressor 163; is connected with the input end of the air conditioner PTC161 and is used for testing the current and the voltage of the input end of the air conditioner PTC 161; and the testing device is connected with the charger 165 and used for testing the current and the voltage of the charger 165. The current sensor and the voltage sensor are respectively arranged on the low-voltage electrical system 132, for example, connected with the cooling water pump 152, and used for testing the current and the voltage of the cooling water pump 152; is connected with the electronic fan 153 and is used for testing the current and the voltage of the input end of the electronic fan 153; connected to the electric brake pump 154 for testing the current and voltage of the electric brake pump 154; and the low-voltage energy consumption units are connected with the instrument, the central control screen and the like and are used for testing the current and the voltage of the low-voltage energy consumption units of the instrument, the central control screen and the like. The current sensor and the voltage sensor are respectively disposed on the thermal management system 134, connected to the thermal management system 134, and used for testing the current and the voltage at the PTC input of the thermal management system 134.
The power analyzer 130 is connected to the current sensor and the voltage sensor, respectively, and obtains a current signal collected by the current sensor and a voltage signal collected by the voltage sensor. Alternatively, the power analyzer 130 may be connected to the power system 131, the electrical system 132, the cooling system 133, and the thermal management system 134, respectively. For example, the power analyzer 130 is connected to the output end of the power battery 1311, the output end of the motor controller 143, the input end of the DC/DC transformer 151, the output end of the DC/DC transformer 151, the input end of the air conditioner compressor 163, the input end of the air conditioner PTC161, the PTC input end of the battery thermal management system 134, the input end of the cooling electronic water pump, and the input end of the cooling electronic fan 153, and is configured to obtain the current and voltage of the power battery 1311, the input and output current and voltage of the motor controller 143, the input and output current and voltage of the DC/DC transformer 151, the input current and voltage of the air conditioner compressor 163, the input current and voltage of the air conditioner PTC161, the current and voltage of the battery thermal management input PTC, and the input current and voltage of the low-voltage electric appliances such. The power analyzer 130 is connected with the upper computer 110, and sends the acquired real-time current and voltage signals of the subsystems to the upper computer 110, and the upper computer 110 can monitor the electric energy and the change condition of the subsystems in real time and influence on other subsystems when the electric energy of one or more of the subsystems is changed.
Optionally, the chassis dynamometer 135 is used for connecting with the wheel 101, and is mainly used for simulating the actual road resistance of the vehicle and loading the vehicle condition information. The chassis dynamometer 135 is connected with the upper computer 110, a real-time vehicle speed signal, a loading resistance signal, a wheel side power signal and the like of the whole vehicle can be acquired through the chassis dynamometer 135, and the upper computer 110 can monitor the real-time vehicle speed signal, the loading resistance signal, the wheel side power signal and the like of the whole vehicle in real time.
The temperature sensor 123 is mainly used for collecting and recording real-time temperature change conditions of all subsystems of the whole vehicle, and includes but is not limited to a power battery temperature sensor, a motor system temperature sensor, a cooling system temperature sensor, a heat management pipeline temperature sensor, a front cabin passenger cabin temperature sensor and the like. The power battery temperature sensor is used for collecting and recording the real-time temperature and the change condition of the power battery 1311. The motor system temperature sensor is used for collecting and recording the real-time temperature and the change condition of the power system 131, including but not limited to the real-time temperature and the change condition of the motor controller 143, the driving motor 145, the reducer 142, the transmission shaft 141 and the like. The cooling system temperature sensor is used for acquiring and recording the real-time temperature and the change condition of the cooling system 133, including but not limited to the real-time temperature and the change condition of the air conditioner compressor 163, the air conditioner PTC161, the cooling water pump 152, the electronic fan 153 and the cooling pipeline. The thermal management pipeline temperature sensor is used for collecting and recording the real-time temperature and the change condition of the battery thermal management PTC. A front cabin passenger compartment temperature sensor is mounted within the passenger compartment 155 for collecting and recording real-time temperature and changes in the passenger compartment 155. The upper computer 110 can monitor real-time temperature signals of the systems and monitor the influence of the change of the temperature signals on the subsystems of the whole vehicle.
The pressure sensor 127 is mainly used for collecting and recording the real-time pressure of the cooling system 133, the battery thermal management pipeline and the flow channel; the flow sensor 125 is mainly used to collect and record the real-time flow of the cooling system 133, the battery thermal management pipeline, and the flow channel. The pressure sensor 127 and the flow sensor 125 are respectively connected with the upper computer 110, and the upper computer 110 can monitor real-time flow signals and real-time pressure signals of the systems and monitor the influence of the changes of the flow signals and/or the changes of the pressure signals on the subsystems of the whole vehicle.
The torque sensor 121 is disposed on the power system 131, and is configured to collect a torque signal of the power system 131, and includes a motor output shaft torque sensor, a reducer output end torque sensor, and a transmission shaft output end torque sensor. The motor output shaft torque sensor is arranged at the output shaft end of the driving motor 145 of the vehicle and is used for testing the real-time torque at the output end of the driving motor 145. The reducer output end torque sensor is arranged at the output shaft end of the reducer 142 and used for testing the torque of the output end of the reducer 142. The torque sensor at the output end of the transmission shaft is arranged at the output shaft end of the transmission shaft 141 and used for testing the torque at the output end of the transmission shaft 141. The upper computer 110 can monitor real-time torque signals of the components and monitor the influence of the change of the torque signals on all subsystems of the whole vehicle.
The whole vehicle energy flow testing system 100 can test the energy flow of the whole vehicle under different use environments, different temperatures and different working conditions according to different working conditions loaded by the chassis dynamometer 135. Optionally, in other embodiments, the entire vehicle energy flow testing system 100 may also test the energy input and output conditions of the cooling system 133 and the battery thermal management system 134 in the charging state. For example, the energy input and output of the charger 165, the energy input of the power battery 1311, the energy input and output of the DC/DC transformer 151, the energy input of the electronic cooling water pump 152, the energy input of the electronic fan 153, and the like, so as to realize the whole vehicle-level energy flow test in the charging state.
The complete vehicle energy flow testing system 100 further includes an energy flow simulation unit, which may be integrated in the upper computer 110 or may be an independent simulation module, which is not specifically limited herein. The energy flow simulation unit is connected with the data acquisition unit, including but not limited to an electrical connection or a communication connection. The data acquisition unit transmits the real-time data of various collected physical quantities to the energy flow simulation unit, and the tested real-time data is combined with the whole vehicle energy flow simulation analysis for calibrating the whole vehicle energy flow simulation and simultaneously calibrating the whole vehicle and various systems, so that a large amount of calibration time is saved. The method has the advantages that the integrated matching capacity of the whole vehicle system is improved, the whole vehicle framework and the whole vehicle control strategy are optimized, so that a basis and a support are provided for the efficiency optimization of each system and each component of the whole vehicle and the reduction of the energy consumption rate of the whole vehicle, the whole vehicle charging quantity of the electric vehicle is saved, the whole vehicle cost is reduced, and the green, environment-friendly and energy-saving technical development of the pure electric vehicle is further promoted.
The whole vehicle energy flow testing system 100 provided by the embodiment can be used for a pure electric vehicle, is also suitable for a hybrid electric vehicle, or is applied to other engineering mechanical equipment. In this embodiment, for being applied to pure electric vehicles as an example, can realize the energy flow test of pure electric vehicles whole car level, know the analysis whole car in different service environment, the energy flow condition under the different service behavior, and in the test process, the influence that each data real-time change and change brought all can be monitored through host computer 110, and test data can with whole car energy flow simulation analysis combine together, and be used for the demarcation of whole car energy flow simulation, mark whole car and each subsystem simultaneously, save a large amount of calibration time. The method has the advantages that the integrated matching capability of the whole vehicle system is improved, and the whole vehicle architecture and the whole vehicle control strategy are optimized, so that a basis and a support are provided for the efficiency optimization of each subsystem and each component of the whole vehicle and the reduction of the energy consumption rate of the whole vehicle, the whole vehicle charging quantity of the electric vehicle is saved, and the whole vehicle cost is reduced.
Second embodiment
The embodiment provides a method for testing energy flow of a whole vehicle, which mainly comprises the following steps:
the data acquisition unit is installed, i.e., various sensors, a power analyzer 130, a chassis dynamometer 135, etc., are arranged on each subsystem of the vehicle. The upper computer 110 and the data acquisition unit are connected well, so that the data signals acquired by the data acquisition unit can be transmitted to the upper computer 110 accurately and inerrably. The upper computer 110 and the data acquisition unit are debugged, so that the whole vehicle data acquisition unit realizes synchronous acquisition, namely, the whole vehicle data acquisition system achieves time coaxiality through the data acquisition recorder and the software debugging of the upper computer 110.
And collecting and recording energy flow data of the whole vehicle under different use conditions. For example, the energy flow condition of the whole vehicle under different ambient temperatures and different working conditions is tested in a charging state or a non-charging state by setting different ambient temperatures and ambient pressures or loading different road working conditions through the chassis dynamometer 135. The real-time change of the energy flow data is monitored and analyzed through the upper computer 110, and the real-time dynamic efficiency and the working condition efficiency of the whole vehicle are obtained.
Optionally, a whole vehicle working condition test and a charging test are carried out according to standard requirements, and in the test process, data of each sensor and the chassis dynamometer 135 are monitored and recorded. The energy flow data of the whole vehicle under different environmental temperatures and different use working conditions are collected, analyzed and compared, parts and optimized intervals which are required to be optimized for the energy flow of the whole vehicle are accurately excavated, and then the whole vehicle of the electric vehicle is optimized, matched and calibrated, so that all system parts of the whole vehicle can operate in a high-efficiency state to the maximum extent, the system efficiency of the whole vehicle is improved, and the energy consumption rate of the whole vehicle is reduced.
Fig. 3 is a schematic diagram of an energy flow result of a vehicle energy flow testing system 100 provided by the present invention, and table 1 is data of a result of a vehicle energy flow testing system 100 provided by the present invention, please refer to fig. 3 and table 1. The arrows in the figure represent the flow of energy, and the different arrow symbols represent the flow of different types of energy. For example, under a certain test condition, 100% of energy is input from the power grid to an OBC (On Board Charger), part of the electric energy of the Charger 165 supplies power to the low-voltage accessories through the DC/DC transformer 151, and part of the electric energy charges the power battery 1311; electric energy of power battery 1311 is partly supplied to the low-voltage accessories via DC/DC converter 151, partly supplied to PCU147(power control unit), and the energy of PCU147 is transmitted to the hub of wheel 101 via driving motor 145, reducer 142, transmission shaft 141, and brake to drive wheel 101 to rotate.
TABLE 1
The energy flow data of the whole vehicle and the loss and efficiency of each subsystem can be seen from fig. 3 and table 1, and the energy loss data of the energy flow test data shown in table 1 is sorted as follows: the system comprises a driving motor 145, a charger 165, a PCU147(Power control Unit), a transmission shaft 141 assembly of a speed reducer 142, a power battery 1311, a discharging process DC/DC loss, a brake and a charging process DC/DC transformer 151 loss. PCU147 integrates control systems of high-voltage electric devices (such as PTC, compressor 163, motor, DC/DC converter 151, and high-voltage distribution box). In the process of optimizing the energy management of the whole vehicle, the components with large energy loss, such as the driving motor 145, the PCU147, the charger 165, the reducer 142, the transmission shaft 141 and the like under the test condition of fig. 3, can be optimized with emphasis with reference to the test data, and can be used as the objects of optimization with emphasis.
In summary, the embodiment of the present invention provides a system 100 and a method for testing energy flow of a finished automobile, which have the following beneficial effects:
the whole vehicle energy flow testing system 100 and the method can accurately acquire the mutual conversion and energy loss conditions among electric energy, mechanical energy and heat energy of all parts of all subsystems of the pure electric vehicle under different environmental temperatures and different working conditions, and obtain the real-time dynamic efficiency and working condition efficiency of all parts, so that the whole vehicle optimization area and the optimized parts are accurately excavated, the accurate optimization work is carried out, and the purpose of reducing the whole vehicle energy consumption rate of the pure electric vehicle is finally realized. In addition, the testing method reduces the number of times of independent testing of the energy flow of each subsystem part, solves the problem of difference between system testing and finished automobile testing, saves the development cost and greatly shortens the development period of the finished automobile. In the testing process, real-time change of each data and influence caused by the change can be monitored by the upper computer 110 system, the testing data can be combined with the whole vehicle energy flow simulation analysis, the testing data acts on the calibration of the whole vehicle energy flow simulation, the whole vehicle and each system are calibrated, and a large amount of calibration time is saved. The method has the advantages that the integrated matching capacity of the whole vehicle system is improved, the whole vehicle framework and the whole vehicle control strategy are optimized, so that a basis and a support are provided for the efficiency optimization of each system and each component of the whole vehicle and the reduction of the energy consumption rate of the whole vehicle, the whole vehicle charging quantity of the electric vehicle is saved, the whole vehicle cost is reduced, and the green, environment-friendly and energy-saving technical development of the pure electric vehicle is further promoted.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The finished automobile energy flow testing system is characterized by comprising an upper computer and a data acquisition unit connected with the upper computer, wherein the data acquisition unit is used for being connected with a plurality of subsystems of a finished automobile, synchronously acquiring and recording real-time data of the subsystems and transmitting the real-time data to the upper computer; and the upper computer is used for receiving and monitoring the real-time data so as to obtain the whole vehicle-level energy flow of the vehicle.
2. The full car energy flow testing system of claim 1, wherein said data acquisition unit comprises a sensor and a chassis dynamometer; and the upper computer is respectively connected with the sensor and the chassis dynamometer.
3. The finished vehicle energy flow testing system of claim 2, wherein the plurality of subsystems includes a power system, an electrical system, a cooling system, and a thermal management system; the sensors comprise a voltage sensor and a current sensor, and the voltage sensor and the current sensor are respectively arranged on the electrical system, the power system, the cooling system and the thermal management system to test voltage signals and current signals.
4. The finished vehicle energy flow testing system of claim 3, wherein the power system includes a power battery and a motor controller; the voltage sensor and the current sensor are respectively arranged on a power battery of a vehicle to test the voltage and the current of the power battery, and are respectively arranged on the input end and the output end of the motor controller to test the voltage and the current of the input end of the motor controller and the voltage and the current of the output end of the motor controller;
the electrical system comprises a DC/DC transformer, and the voltage sensor and the current sensor are respectively arranged at the input end and the output end of the DC/DC transformer so as to test the voltage and the current of the input end and the output end of the DC/DC transformer;
the cooling system comprises an air conditioner, a cooling water pump and an electronic fan; the voltage sensor and the current sensor are respectively arranged at the input end of a compressor of the air conditioner, the input end of a PTC (positive temperature coefficient) of the air conditioner, the input end of the cooling water pump and the input end of the electronic fan so as to test the voltage and the current of the air conditioner, the cooling water pump and the electronic fan;
the heat management system comprises a battery heat management system, and the voltage sensor and the current sensor are respectively arranged at the PTC input end of the battery heat management system to test the voltage and the current at the PTC input end of the battery heat management system.
5. The finished vehicle energy flow testing system of claim 2, wherein the plurality of subsystems includes a power system, an electrical system, a cooling system, and a thermal management system; the sensor includes a power analyzer for connecting the electrical system, the power system, the cooling system, and the thermal management system, respectively.
6. The finished vehicle energy flow testing system of claim 2, wherein the plurality of subsystems includes a power system, an electrical system, a cooling system, and a thermal management system; the sensors comprise a temperature sensor, a pressure sensor and a flow sensor, and the temperature sensors are respectively used for the electric system, the power system, the cooling system and the thermal management system which are arranged on the vehicle;
the pressure sensor and the flow sensor are respectively used for being arranged at the water inlet and the water outlet of a cooling system and a thermal management system of the vehicle.
7. The complete vehicle energy flow testing system of claim 2, wherein the sensors comprise torque sensors for being disposed at a motor output shaft end, a reducer output shaft end and a transmission shaft output shaft end of the vehicle.
8. The complete vehicle energy flow testing system of claim 2, wherein the chassis dynamometer is configured to interface with a wheel of a vehicle to obtain a complete vehicle real-time speed signal, a loading resistance signal, and a wheel work signal.
9. The vehicle energy flow testing system according to any one of claims 1 to 8, further comprising an energy flow simulation unit connected to the data acquisition unit; and the data acquisition unit transmits the real-time data to the energy flow simulation unit for calibrating the energy flow of the whole vehicle.
10. A vehicle energy flow testing method, which is applied to the vehicle energy flow testing system of any one of claims 1 to 9, comprising:
debugging an upper computer and a data acquisition unit to realize synchronous acquisition of the whole vehicle data acquisition unit;
collecting and recording energy flow data of the whole vehicle under different use conditions;
monitoring and analyzing real-time changes in the energy flow data;
and acquiring the real-time dynamic efficiency and the working condition efficiency of the whole vehicle.
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