CN117590116A - DC configurable power load test method and device based on inversion technology - Google Patents
DC configurable power load test method and device based on inversion technology Download PDFInfo
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- CN117590116A CN117590116A CN202311529603.6A CN202311529603A CN117590116A CN 117590116 A CN117590116 A CN 117590116A CN 202311529603 A CN202311529603 A CN 202311529603A CN 117590116 A CN117590116 A CN 117590116A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
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Abstract
The invention discloses a DC configurable power load test method and device based on an inversion technology, which belong to the technical field of new energy, and comprise the following steps: determining a loading power mode; according to the power set by the module, corresponding information is sent to the power management module; the power management module enters a load mode to simulate a constant voltage or constant current load flow of the battery pack to the charging pile; in the charging process, receiving information of a front-end interaction module in real time, and performing input and output power calibration by a power management module through ammeter data; the inversion load module judges the load state according to the collected direct current information output by the charging pile and executes corresponding processing; according to the DC configurable power load testing method and device based on the inversion technology, the design of the simulated battery load end of the electric vehicle is completed by utilizing the design of the power management module, the adjustment process of the load charging power of the electric vehicle is realized, the flexibility of the system is improved from the aspect of hardware, and the detection of the output power of the charging pile of the vehicle is more flexible.
Description
Technical Field
The invention belongs to the technical field of new energy, and particularly relates to a DC configurable power load testing method and device based on an inversion technology.
Background
The automobile BMS simulator is used for detecting the charging function and the security function of the automobile charging pile, and the current automobile simulator mainly detects the function of the charging pile by taking a resistor as a load; but the resistor is high in energy consumption, low in detection efficiency and high in potential safety hazard, only a single type of charging pile can be detected, so that the DC configurable power load testing method and device based on the inversion technology are developed to solve the existing problems.
Disclosure of Invention
The invention aims to provide a DC configurable power load testing method and device based on an inversion technology, which are used for solving the problems of high energy consumption and low detection efficiency when a resistor is used as a load to detect the function of a charging pile.
In order to achieve the above purpose, the present invention provides the following technical solutions: a DC configurable power load test method based on an inversion technology comprises the following steps:
setting loading power and loading mode;
according to the loading power, adjusting the output power and simulating the load test of the battery pack to the charging pile in an output mode;
in the load test, the front-end interaction information is received in real time, and the input and output power calibration is carried out through ammeter data;
collecting direct current parameters output by the charging pile, judging the load state and executing corresponding processing;
wherein the input output power calibration comprises:
and comparing the output power data with the acquired ammeter data to obtain a difference value, if the difference value is larger than a set value and the loading power is larger than the power set value, gradually reducing the output power to the power set value, and if the loading power is smaller than the power set value, interrupting charging.
Preferably, the set value is 1%.
Preferably, the power set point is 20kw.
Preferably, the load test includes:
constant voltage load test and constant current load test;
the constant voltage load test includes: detecting whether the voltage output precision of the charging pile is stable or not, and judging that the voltage output precision of the charging pile is stable if the output voltage interval of the charging pile is between a voltage value of-1% and a voltage value of +1%;
the constant current load test comprises the following steps: and detecting whether the current output precision of the charging pile is stable or not, and judging that the current output precision of the charging pile is stable if the output current interval of the charging pile is from a constant current value of-1% to a constant current value of +1%.
Preferably, the collecting the dc parameter output by the charging pile to determine the load state and executing the corresponding process includes:
if the load state is in a constant voltage mode, the module voltage is set to be a fixed value, and the current is regulated and reduced according to the power;
if the load state is a constant current mode, the current of the module is set to be a constant current value, and the voltage is regulated according to the power;
and when the difference value of the rated current and the rated voltage set in the interaction information of the output current and the voltage and the front end exceeds a set value, judging that the charging test is interrupted.
Preferably, when the fault is determined, the output voltage is reduced, the current is reduced, and when the output voltage is lower than 20V, the contactor is opened.
Preferably, the receiving the front-end interaction information in real time includes: the charging of the UI allows a flag, a current voltage, current, power or status flag, and meter data.
Preferably, the method further comprises the step of sending a test result to the front-end interaction module for display after the load test of the charging pile is completed.
The invention further provides a dc configurable power load device based on an inversion technology, comprising:
a battery module;
the front-end interaction module is used for selecting functions and displaying data;
the central control module is used for controlling the running simulator system, monitoring the working state of the component, and carrying out configuration, correction and judgment of load parameters and fault judgment;
the information acquisition module is used for collecting simulator circuit data;
the communication transmission module is used for controlling data signals between the module and all other devices;
the inverter module is used for matching BMS simulators with different charging standards to carry out load test;
a power management module;
the power management module includes: at least one power module and a power center control module.
Preferably, the front-end interaction module includes: the configuration of the loading power of the module pile, the current simulator circuit data display, the working state of the module pile and the output power of the charging pile.
The invention has the technical effects and advantages that: according to the DC configurable power load testing method and device based on the inversion technology, the design of the simulated battery load end of the electric vehicle is completed by utilizing the module stack design, the adjustment process of the load charging power of the electric vehicle is realized, and under the condition that no electric quantity is consumed (only a small part of consumption is maintained), the charging scene of the simulator can be realized and the actual vehicle adjustment load can be simulated; the flexibility of the system is improved from the aspect of hardware, so that the detection of the output power of the automobile charging pile is more flexible, the application range of the load of the electric automobile is improved, the charging test of various types of direct current charging piles is met, the inverter is used for replacing the traditional resistor to realize the load end of the electric automobile, the efficiency and the performance of the simulator are improved, the energy feedback can be realized, the use cost of the simulator is greatly reduced, and the safety in the use process is improved; the simulator charging function and the fault simulation function of multiple modes are realized; the BMS simulator with different charging standards can be matched for load test, and fault modes such as overload and the like can be set through power adjustment of the module stack.
Drawings
FIG. 1 is a flow chart of a test method of the present invention;
FIG. 2 is a block diagram of an electrical system of the apparatus of the present invention;
FIG. 3 is a control logic diagram of the device of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a DC configurable power load testing method based on an inversion technology as shown in fig. 1, which comprises the following steps:
step 1: determining a loading power mode of the power supply module through the front-end interaction module;
step 2: the data is transmitted to the central control module through the communication transmission module, and the central control module transmits corresponding information to the power management module according to the set power input by the front-end interaction module; the data includes a charging mode: constant voltage or constant current mode, load power, charge permission state, peripheral communication state, etc.; the corresponding information includes output voltage, output current parameter;
step 3: the power management module enters a load mode according to the information of the central control module, adjusts the power of the power management module and carries out a constant voltage/constant current load flow of the simulated battery pack to the charging pile in an output mode; in this embodiment, the power management module includes: 6 power supply modules and a power supply center control module;
step 4: in the load flow, information of a front-end interaction module is received in real time, a power management module performs input and output power calibration through ammeter data, if the calibration fails, current is gradually reduced, if the power management module detects that a charging pile does not interrupt charging, the input power is detected to still have current greater than 5A or voltage greater than 20V, and the load device is judged to be still in the charging process, and then the load device is required to actively perform power-off processing; the receiving of the information of the front-end interaction module comprises the following steps: the charging permission flag bit of the UI, the current voltage/current/power/state flag bit fed back by the power management module and the method for calibrating the ammeter data comprise the following steps: and comparing the data fed back by the power management module with the actual collected data of the ammeter, and if the power difference is greater than 1%, considering that the difference is too large. The step-down of the current includes: if the difference is too large, the software flow is automatically controlled to be reduced to 20kw, and if the loading power is smaller than 20kw, the software flow is not reduced;
step 5: the direct current configurable power load device collects direct current parameters output by the charging pile through the information collection module, judges the load state according to the circuit information and executes corresponding processing; the input voltage of the power management module is the output voltage of the charging pile, whether the load works normally or not is confirmed through the output voltage/current of the power management module, if the output power exists in the module, the output power is certainly absorbed by the inverter, the inverter works, namely, the load state is started), the load state is judged, and the corresponding processing is executed, wherein the method comprises the following steps: if the UI sets the charging mode to be a constant voltage mode, the module voltage is set to be a fixed value, the current is regulated and reduced according to the power, and a BMS simulator is needed to be matched;
if the UI sets the charging mode as a constant current mode, the module voltage is set as a constant current value, and the voltage is regulated according to the power, so that the BMS simulator is needed to be matched; when the output current and voltage of the power management module have larger phase difference with rated current and voltage set in the front-end interaction module, judging that the inversion load module has a fault, and interrupting the charging flow at the moment; pressing an emergency stop button in the charging process, and immediately stopping the charging of the load;
step 6: after the load test of the charging pile is completed, the central control module displays the test result on the front-end interaction module;
selection of the operation mode in step 2: the working modes are configured through the UI interface, and the load device based on the inversion technology has two working modes: a constant voltage mode and a constant current mode; the constant voltage mode is used for testing the constant voltage output function of the charging pile, and the testing method comprises the following steps: in the constant voltage mode, detecting whether the voltage output precision of the charging pile is stable, and if so, passing; if the constant voltage is 500V, the output voltage interval of the charging pile is 500 V+/-1%; requiring manual operation by a tester; the constant current mode is used for testing the constant current state of the charging pile, so that the test can be realized and a test result can be given; tests may be implemented and test results may be given including: and in the constant current mode, detecting whether the current output precision of the charging pile is stable. If stable, pass. If the constant current is 100A, the output voltage interval of the charging pile is 500 A+/-1%;
the testing process of the charging pile in the charging process in the step 4 comprises the following steps:
step 4-1: in the charging state, each item of data of the simulator circuit system is updated in real time through an information acquisition module, loading operation is carried out according to the setting, and whether the output function of the charging pile is normal or not is judged according to the circuit information; the circuit information is based on: charging data (voltage/current/power), charging mode (constant voltage/constant current); judging whether the output function of the charging pile is normal or not includes: whether the current output power is consistent with the requested voltage/current (requiring the BMS simulator to cooperate);
step 4-2: if communication between the central control module and the information acquisition module or other modules is lost in the charging process, at the moment, the direct-current configurable power load device based on the inversion technology is judged to be faulty, and the load mode is stopped immediately to interrupt charging; the load stopping mode includes: the output voltage and current of the power management module are reduced. When the output voltage is below 20V, the contactor is opened.
The invention further provides a DC configurable power load device based on an inversion technology, which comprises a front-end interaction module, a central control module, an information acquisition module, a communication transmission module and an inverter module;
the front-end interaction module is used for selecting functions and displaying data;
the central control module is used for controlling the operation of the simulator system; monitoring the working state of components in the system, configuring and checking and judging load parameters, performing UI interaction and performing fault judgment;
the information acquisition module is used for collecting simulator circuit data; and the voltage/current data are checked, so that potential safety hazards caused by abnormal charging piles and devices are prevented.
The communication transmission module is used for controlling data signals between the module and all other devices;
the front-end interaction module is realized by using a capacitive screen, and the configuration of the loading power of the module pile, the current simulator circuit data display, the working state of the module pile, the output power of the charging pile and the like are realized by using the capacitive screen;
the central control module processes and corresponds to the information of each module by using an independently developed control module, and maintains the effective and stable operation of the whole simulator;
the information acquisition module is circuit information in the simulator and feeds the information back to the central control module for processing;
the communication transmission module adopts communication modes such as CAN communication and RS485 to realize data signal exchange among the modules.
According to the DC configurable power load testing method and device based on the inversion technology, the design of the simulated battery load end of the electric vehicle is completed by utilizing the module stack design, the adjustment process of the load charging power of the electric vehicle is realized, the flexibility of the system is improved from the aspect of hardware, the output power detection of the vehicle charging pile is more flexible, the application range of the load of the electric vehicle is improved, the charging test of various types of DC charging piles is met, the inverter is used for replacing the traditional resistor to realize the load end of the electric vehicle, the efficiency and performance of the simulator are improved, the energy feedback can be realized, the use cost of the simulator is greatly reduced, and the safety in the use process is improved; the simulator charging function and the fault simulation function of multiple modes are realized; the BMS simulator with different charging standards can be matched for load test, and fault modes such as overload and the like can be set through power adjustment of the module stack.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.
Claims (10)
1. A DC configurable power load test method based on an inversion technology is characterized in that: comprising the following steps:
setting loading power and loading mode;
according to the loading power, adjusting the output power and simulating the load test of the battery pack to the charging pile in an output mode;
in the load test, the front-end interaction information is received in real time, and the input and output power calibration is carried out through ammeter data;
collecting direct current parameters output by the charging pile, judging the load state and executing corresponding processing;
wherein the input output power calibration comprises:
and comparing the output power data with the acquired ammeter data to obtain a difference value, if the difference value is larger than a set value and the loading power is larger than the power set value, gradually reducing the output power to the power set value, and if the loading power is smaller than the power set value, interrupting charging.
2. The method for testing the dc configurable power load based on the inversion technology according to claim 1, wherein the method comprises the following steps: the set value is 1%.
3. The method for testing the dc configurable power load based on the inversion technology according to claim 1, wherein the method comprises the following steps: the power setting is 20kw.
4. The method for testing the dc configurable power load based on the inversion technology according to claim 1, wherein the method comprises the following steps: the load test includes:
constant voltage load test and constant current load test;
the constant voltage load test includes: detecting whether the voltage output of the charging pile is stable or not, and judging that the voltage output of the charging pile is stable if the output voltage interval of the charging pile is between a voltage value of-1% and a voltage value of +1%;
the constant current load test comprises the following steps: and detecting whether the current output of the charging pile is stable or not, and judging that the current output of the charging pile is stable if the output current interval of the charging pile is from a constant current value of-1% to a constant current value of +1%.
5. The method for testing the dc configurable power load based on the inversion technology according to claim 1, wherein the method comprises the following steps: the step of collecting the direct current parameters output by the charging pile to judge the load state and executing corresponding processing comprises the following steps:
if the load state is in a constant voltage mode, setting the voltage of the DC/DC power supply module to be a fixed value, and configuring the adjustment and the subtraction of the current according to the power;
if the load state is a constant current mode, the current of the module is set to be a constant current value, and the voltage is regulated according to the power;
and when the difference value of the rated current and the rated voltage set in the interaction information of the output current and the voltage and the front end exceeds a set value, judging that the charging test is interrupted.
6. The method for testing the dc configurable power load based on the inversion technology according to claim 4, wherein the method comprises the steps of: and when the output voltage is lower than 20V, opening the contactor.
7. The method for testing the dc configurable power load based on the inversion technology according to claim 1, wherein the method comprises the following steps: the real-time receiving of the front-end interaction information comprises: the charging of the UI allows a flag, a current voltage, current, power or status flag, and meter data.
8. The method for testing the dc configurable power load based on the inversion technology according to claim 1, wherein the method comprises the following steps: the method further comprises the step of sending a test result to the front-end interaction module for display after the load test of the charging pile is completed.
9. The utility model provides a direct current configurable power load device based on contravariant technique which characterized in that: comprising the following steps:
a battery module;
the front-end interaction module is used for selecting functions and displaying data;
the central control module is used for controlling the running simulator system, monitoring the working state of the component, and carrying out configuration, correction and judgment of load parameters and fault judgment;
the information acquisition module is used for collecting simulator circuit data;
the communication transmission module is used for controlling data signals between the module and all other devices;
the inverter module is used for matching BMS simulators with different charging standards to carry out load test;
a power management module;
the power management module includes: at least one power module and a power center control module.
10. The dc configurable power load device according to claim 9, wherein: the front-end interaction module comprises: the configuration of the loading power of the module pile, the current simulator circuit data display, the working state of the module pile and the output power of the charging pile.
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