TWI819891B - Safety detection simulation system for charging pile, and detection method - Google Patents

Abstract

A Safety detection simulation system for charging pile, and detection method, said charging pile includes a control system for controlling voltage and current, and a cooling system. Said safety detection simulation system includes a database unit, a monitoring unit, a hardware-in-the-loop simulation unit, and a protection unit. Said safety detection simulation system can capture the voltage value, current value and temperature value of said charging pile in real time, and calculate the aforementioned parameters through said hardware-in-the-loop simulation unit to determine the voltage value, current value and temperature value of said charging pile whether it will cause safety problems. When it is found that the voltage value, current value, or temperature value of the charging pile exceeds the dangerous level, it will actively operate the corresponding protection measures or protection measures to avoid danger.

Description

Charging pile safety detection simulation system and its detection method

The present invention relates to a safety detection simulation system and a detection method thereof, in particular to a safety detection simulation system and a detection method for a charging pile of an electric vehicle.

Due to the rise in people's awareness of green energy technology, many countries have begun to implement policies related to replacing fuel vehicles with electric vehicles. At the same time, the market share of electric vehicles has continued to grow. After the battery power of electric vehicles is exhausted, they will The battery needs to be replaced or charged. For electric vehicles, the fact that the battery is heavy and difficult to disassemble makes it difficult to replace the battery. Therefore, the most popular charging method at present is to park the vehicle next to the charging pile and charge it with The electric energy from the charging pile charges the car's battery.

However, the current charging piles on the market lack sufficient charging safety management and cannot control and provide early warning for parameters such as current, voltage or temperature during the charging process. In particular, the actual charging piles have DC charging and Various types of AC charging and other modes cause the changes in various factors in the charging process to be very dynamic and complex. Therefore, it is difficult for current charging piles to pre-set the range for safety control. Although many electric vehicles are equipped with battery management systems (BMS), the information from the battery management system cannot be used by charging piles, and when safety problems occur, charging piles cannot be safely controlled. Therefore, there is still huge room for improvement.

Therefore, the purpose of the present invention is to provide a safety detection simulation system that can monitor charging piles in real time and actively perform safety management and control.

Therefore, in the safety detection simulation system of the charging pile of the present invention, the charging pile includes a control system for controlling voltage and current, and a cooling system. The safety detection simulation system includes a database unit, a monitoring unit, a hardware loop simulation unit, and a protection unit. The database unit stores a plurality of condition parameters, and a plurality of voltage standard values, current standard values, and temperature standard values corresponding to the condition parameters. The monitoring unit is used to detect real-time data when the charging pile is charging. The real-time data includes a voltage value, a current value, and a temperature value. The hardware loop simulation unit is used to receive the real-time data measured by the monitoring unit, and calculate the real-time data in real time to find a condition parameter that meets the condition parameter from the database unit, and a condition parameter corresponding to the condition parameter. voltage standard value, a current standard value, and a temperature standard value. The protection unit is used to control the control system of the charging pile to reduce load or shut down, and can control the cooling system of the charging pile to increase or decrease power.

Another object of the present invention is to provide a detection method for the above-mentioned safety detection simulation system.

Therefore, the detection method of the present invention includes a monitoring step, a simulation step, and a protection step. In the monitoring step, when the charging pile charges at least one battery, real-time data of the charging pile is detected through the monitoring unit. The real-time data includes voltage values, current values, and temperature values, and the monitoring unit transmits the real-time data sent to the hardware loop simulation unit.

In the simulation step, the hardware loop simulation unit calculates the real-time data to find a condition parameter that matches the database unit, and the voltage standard value and current standard value corresponding to the condition parameter. and temperature standard value, and then the hardware circuit simulation unit compares the corresponding voltage standard value, current standard value, and temperature standard value with the voltage value, current value, and temperature value of the real-time data respectively to determine the accuracy of the real-time data. Whether the voltage value, current value, and temperature value exceed the dangerous level.

In this protection step, when the voltage value, current value, and temperature value in the real-time data do not exceed the dangerous level, the monitoring step is executed again. When the voltage value or current value in the real-time data exceeds the dangerous level, the monitoring step is performed again. The protection unit executes a protection method. The protection method is at least one of issuing a warning, controlling the control system of the charging pile to reduce the load, controlling the control system of the charging pile to shut down, and submitting abnormal data to the background. When the real-time data When the temperature value exceeds the dangerous level, the protection unit implements a protection method. The protection method is to issue a warning, control the control system of the charging pile to reduce the load, control the control system of the charging pile to shut down, and increase the power of the cooling system of the charging pile. , and submit abnormal data to at least one of them in the backend.

The effect of the present invention is that the present invention can instantly capture the voltage value, current value of the charging pile, and the temperature value of the charging connector at any contact point during charging, and calculate the aforementioned parameters through the hardware circuit simulation unit , to determine whether the voltage value, current value and temperature value of the charging pile will cause safety problems. When it is found that the voltage value, current value or temperature value of the charging pile exceeds the dangerous level, corresponding protection measures will be actively implemented. or protective measures to avoid safety issues.

Referring to Figure 1, an embodiment of the safety detection simulation system 2 of the charging pile 1 of the present invention is shown. The charging pile 1 includes a control system 11 and a cooling system 12. The safety detection simulation system 2 includes a database unit 21, a monitoring unit 22, a hardware loop simulation unit 23 signally connected to the database unit 21 and the monitoring unit 22, and a protection unit 24. The database unit 21 stores a plurality of condition parameters pre-constructed by the user, and a plurality of voltage standard values, current standard values, and temperature standard values corresponding to the condition parameters. The monitoring unit 22 includes a sensing element 221 that is embedded in the charging pile 1 and connected to the hardware circuit simulation unit 23 via signals. The hardware loop simulation unit 23 can be used to perform hardware-in-the-loop simulation (HIL). Through the hardware loop simulation unit 23, the DC connected to the battery pack of an electric vehicle (EV) can be The method of establishing a model for fast charging piles is (1) corresponding to the power grid: modeling the voltage of the AC power supply as a three-phase constant voltage source. (2) Corresponding to DC fast charging: convert the AC power voltage from the power grid to the DC voltage level required by the electric vehicle battery pack. (3) Corresponding to the electric car battery pack: the battery is modeled as a series of battery cells. The protection unit 24 includes a voltage protection module 241, a current protection module 242, and a temperature control protection module 243.

Referring to Figures 1 and 2, one embodiment of the detection method of the safety detection simulation system 2 of the present invention includes a monitoring step 31, a simulation step 32, and a protection step 33. In the monitoring step 31, when the charging pile 1 charges one or more batteries of the electric vehicle, the sensing element 221 will detect the real-time data of the charging pile 1 during charging. The aforementioned real-time data includes voltage value, current value, and the temperature value of the charging connector at any contact point during charging. Then the monitoring unit 22 transmits the real-time data to the hardware loop simulation unit 23 .

In the simulation step 32 , the hardware circuit simulation unit 23 calculates the real-time data to find a conditional parameter consistent with the conditional parameter from the database unit 21 according to the current charging status of the charging pile 1 . Corresponding voltage standard value, current standard value, and temperature standard value. It should be noted that the user can also adjust the calculation method of the hardware loop simulation unit 23 through the input interface to adjust according to actual needs. Then the hardware circuit simulation unit 23 compares the corresponding voltage standard value, current standard value, and temperature standard value with the voltage value, current value, and temperature value of the real-time data respectively to determine the voltage value and current value of the real-time data. value, and whether the temperature value exceeds the danger level.

Here are the methods for determining different hazard levels in this embodiment. When the voltage value in the real-time data is less than 90% of the voltage standard value, it is determined that the voltage value does not exceed the hazard level. When the voltage value is 90% to 90% of the voltage standard value, When 100%, it is judged that the danger level is exceeded and the danger level is low. When the voltage value is 101% to 120% of the voltage standard value, it is judged that the danger level is exceeded and the danger level is medium. When the voltage value is more than 121% of the voltage standard value, When , it is determined that the hazard level is exceeded and the hazard level is high.

When the current value in the real-time data is less than 90% of the current standard value, it is judged that the current value does not exceed the danger level. When the current value is 90% to 100% of the current standard value, it is judged that it exceeds the danger level and the danger level is low. When the current value is 101% to 120% of the current standard value, it is determined that the hazard level is exceeded and the hazard level is medium. When the current value is more than 121% of the current standard value, it is determined that the hazard level is exceeded and the hazard level is high.

When the temperature value in the real-time data is lower than 45 degrees Celsius, it is judged that the temperature value does not exceed the danger level. When the temperature value exceeds 45 degrees Celsius, it is judged that it exceeds the danger level and the danger level is low. When the temperature value exceeds 50 degrees Celsius to Celsius When the temperature exceeds 60 to 65 degrees Celsius, the danger level is exceeded and the danger level is high. When the temperature exceeds 70 degrees Celsius, the danger level is exceeded and the danger level is high. The danger level is very high.

In the protection step 33, when the voltage value, current value, and temperature value in the real-time data do not exceed the dangerous level, the monitoring step 31 is executed again. When the voltage value (or current value) in the real-time data exceeds the dangerous level, the voltage protection module 241 (or the current protection module 242) executes a protection method. When the danger level of the voltage value (or current value) is low, the protection method is to issue a warning. When the danger level of the current value is medium, the protection means is to issue a warning and control the control system 11 of the charging pile 1 to reduce the load. When the danger level of the current value is high, the protection method is to issue a warning, control the control system 11 of the charging pile 1 to shut down, and submit abnormal data to the background. When the temperature value in the real-time data exceeds the danger level, the temperature control protection module 243 performs a protection method. When the danger level of the temperature value is low, the protection method is to issue a warning. When the risk level of the temperature value is medium, the protection means is to issue a warning and increase the power of the cooling system 12 of the charging pile 1 . When the danger level of the temperature value is high, the protection means is to issue a warning, control the control system 11 of the charging pile 1 to reduce the load, and increase the power of the cooling system 12 of the charging pile 1 . When the danger level of the temperature value is extremely high, the protection method is to control the control system 11 of the charging pile 1 to shut down and submit abnormal data to the background.

It should be noted that when more than one of the voltage value, current value, and temperature value exceeds the hazard level, the item with the higher hazard level will be used to implement the corresponding protection method or protection method. If the hazard levels are the same, voltage, current, and temperature will be executed in sequence. When the situation is under control and the voltage value, current value, and temperature value of the real-time data do not exceed the dangerous level, the monitoring step 31 can be performed again to continue monitoring and safety control.

The present invention can dynamically calculate the actual charging status of the charging pile 1 through real-time hardware circuit simulation. In this way, in addition to adapting to the AC charging modes of different vehicle types, it can also effectively control charging speeds that are faster but are also more dangerous. DC fast charging, and when the present invention detects that the voltage value, current value, or temperature value exceeds the dangerous level, in addition to issuing a warning, it will also actively regulate the charging pile 1 as the level increases, such as lowering the level. Load, improve the heat dissipation efficiency of the cooling system 12, or shut down, and these different levels of management and control methods also give the charging pile 1 other options besides shutting down immediately, so that the charging pile 1 can quickly eliminate dangerous situations and continue to operate, avoiding causing inconvenience to users.

In summary, the present invention can perform real-time hardware circuit simulation on the charging pile 1 through the embedded sensing element 221, thereby detecting potential abnormalities in voltage, current, temperature and other items when the charging pile 1 is charging. Not only that, when the abnormal situation expands, the present invention can also actively implement the protection means and the protective means, so that the charging pile 1 automatically enters the safe protection state, achieving the effect of active protection and eliminating abnormalities, and uses It can also be adjusted according to actual needs to achieve the best safety protection effect, so the purpose of the present invention can indeed be achieved.

However, the above are only examples of the present invention, and should not be used to limit the scope of the present invention. All simple equivalent changes and modifications made based on the patent scope of the present invention and the content of the patent specification are still within the scope of the present invention. Within the scope covered by the patent of this invention.

1: Charging pile 11:Control system 12: Cooling system 2: Safety detection simulation system 21: Database unit 22:Monitoring unit 221: Sensing element 23:Hardware loop simulation unit 24: Protection unit 241: Voltage protection module 242:Current protection module 243:Temperature control protection module 31: Monitoring steps 32: Simulation steps 33:Protection steps

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a schematic diagram illustrating an embodiment of the safety detection simulation system for charging piles of the present invention; and FIG. 2 is a flow chart illustrating one embodiment of the detection method of the safety detection simulation system of the present invention.

1: Charging pile

11:Control system

12: Cooling system

2: Safety detection simulation system

21: Database unit

22:Monitoring unit

221: Sensing element

23:Hardware loop simulation unit

24: Protection unit

241: Voltage protection module

242:Current protection module

243:Temperature control protection module

Claims (10)

A safety detection simulation system for a charging pile. The charging pile includes a control system for controlling voltage and current, and a cooling system. The safety detection simulation system includes: a database unit that stores a plurality of condition parameters, and a plurality of parameters related to the same. The voltage standard value, the current standard value, and the temperature standard value corresponding to the condition parameters; a monitoring unit used to detect a real-time data when the charging pile is charging, the real-time data includes a voltage value, a current value, and a Temperature value; a hardware loop simulation unit for receiving the real-time data measured by the monitoring unit, and immediately calculating the real-time data to find a matching condition parameter from the database unit, and matching the condition parameter A corresponding voltage standard value, a current standard value, and a temperature standard value; and a protection unit used to control the control system of the charging pile to reduce the load or shut down, and to control the cooling system of the charging pile to increase power and reduced power. The safety detection simulation system for charging piles as described in claim 1, wherein the monitoring unit includes at least one sensing element that is embedded in the charging pile and connected to the hardware circuit simulation unit via signals. The safety detection simulation system for charging piles as described in claim 1, wherein the protection unit includes a voltage protection module for controlling the load reduction or shutdown of the control system of the charging pile, and a voltage protection module for controlling the control system of the charging pile. A current protection module that controls the load reduction or shutdown of the system, and a control system used to control the load reduction or shutdown of the charging pile, and can control the cooling system improvement of the charging pile. Temperature control protection module for power and power reduction. A detection method of the safety detection simulation system as described in claim 1, including: a monitoring step, when the charging pile charges at least one battery, detecting real-time data of the charging pile through the monitoring unit, the real-time data includes voltage value, current value, and temperature value, the monitoring unit transmits real-time data to the hardware loop simulation unit; in a simulation step, the hardware loop simulation unit calculates the real-time data to find out the corresponding value in the database unit. A condition parameter that meets the condition parameter, and the voltage standard value, current standard value, and temperature standard value corresponding to the condition parameter, and then the hardware loop simulation unit converts the corresponding voltage standard value, current standard value, and temperature standard value Compare the voltage value, current value, and temperature value of the real-time data respectively to determine whether the voltage value, current value, and temperature value of the real-time data exceed the dangerous level. The hardware circuit simulation unit will be connected to the at least one battery. The charging pile establishes a model, which includes modeling the voltage of the AC power supply corresponding to the power grid as a three-phase constant voltage source, and converting the AC power supply voltage from the power grid into the required DC voltage level; and a protection step. When the real-time data is When the voltage value, current value, and temperature value do not exceed the danger level, the monitoring step is performed again. When the voltage value or current value in the real-time data exceeds the danger level, the protection unit executes a protection method. The protection method In order to issue a warning, control the control system of the charging pile to reduce the load, control the control system of the charging pile to shut down, and submit abnormal data to the background, at least one of them, when the temperature value in the real-time data exceeds the dangerous level, the protection unit implement a protective measure that The means include at least one of issuing a warning, controlling the control system of the charging pile to reduce the load, controlling the control system of the charging pile to shut down, increasing the power of the cooling system of the charging pile, and submitting abnormal data to the background. The detection method as described in claim 4, wherein in the simulation step, when the voltage value in the real-time data is less than 90% of the voltage standard value, it is determined that the voltage value does not exceed the dangerous level, and when the voltage value is the voltage standard value When the voltage value is 90% to 100%, it is judged that the danger level is exceeded and the danger level is low. When the voltage value is 101% to 120% of the voltage standard value, it is judged that the danger level is exceeded and the danger level is medium. When the voltage value is the voltage standard value When it is more than 121%, it is determined that the danger level is exceeded and the danger level is high. In this protection step, when the danger level of the voltage value is low, the protection method is to issue a warning. When the danger level of the voltage value is medium, the protection method is The protection means is to issue a warning and control the control system of the charging pile to reduce the load. When the danger level of the voltage value is high, the protection means is to issue a warning, shut down the control system of the charging pile, and submit abnormal data to the background. The detection method as described in claim 4, wherein in the simulation step, when the current value in the real-time data is less than 90% of the current standard value, it is determined that the current value does not exceed the dangerous level, and when the current value is the current standard value When the current value is 90% to 100% of the current standard value, it is judged to exceed the danger level and the danger level is low. When the current value is 101% to 120% of the current standard value, it is judged to exceed the danger level and the danger level is medium. When the current value is the current standard value When the current value is more than 121%, it is determined that the danger level is exceeded and the danger level is high. In this protection step, when the danger level of the current value is low, the protection method is to issue a warning. When the danger level of the current value is medium, the protection method is Protection means are to issue warnings and control the charging pile The control system performs load reduction. When the danger level of the current value is high, the protection method is to issue a warning, control the control system of the charging pile to shut down, and submit abnormal data to the background. The detection method as described in claim 4, wherein in the simulation step, when the temperature value in the real-time data is lower than 45 degrees Celsius, it is determined that the temperature value does not exceed the danger level; when the temperature value exceeds 45 degrees Celsius, it is determined that It exceeds the danger level and the danger level is low. When the temperature value exceeds 50 degrees Celsius to 55 degrees Celsius, it is judged to exceed the danger level and the danger level is medium. When the temperature value exceeds 60 degrees Celsius to 65 degrees Celsius, it is judged to exceed the danger level and is dangerous. The level is high. When the temperature value exceeds 70 degrees Celsius, it is determined that the danger level is exceeded and the danger level is ultra-high. In this protection step, when the danger level of the temperature value is low, the protection method is to issue a warning. When the temperature value When the danger level of the temperature value is medium, the protection method is to issue a warning and increase the power of the cooling system of the charging pile. When the danger level of the temperature value is high, the protection method is to issue a warning and control the control system of the charging pile to reduce the load. , and increase the power of the cooling system of the charging pile. When the danger level of the temperature value is extremely high, the protection method is to control the control system of the charging pile to shut down and submit abnormal data to the background. The detection method according to claim 4, wherein the protection unit of the safety detection simulation system includes a voltage protection module for controlling the load reduction or shutdown of the control system of the charging pile. In the protection step, when the voltage When the value exceeds the dangerous level, the voltage protection module performs the protection method. The detection method according to claim 4, wherein the protection unit of the safety detection simulation system includes a current protection module for controlling the load reduction or shutdown of the control system of the charging pile. In the protection step, when the current value exceeds When the hazard level is reached, the current protection module performs this protection method. The detection method as described in claim 4, wherein the protection unit of the safety detection simulation system includes a control system for controlling the charging pile to reduce load or shut down, and can control the cooling system of the charging pile to increase power and A temperature control protection module that reduces power. In this protection step, when the temperature value exceeds the dangerous level, the temperature control protection module executes the protection method.

Images