AC charging pile energy-saving simulation load
By designing an energy-saving simulated load for AC charging piles, and utilizing the simulated load host and battery box, charging pile testing can be achieved without the participation of electric vehicles. This solves the problems of high cost and energy waste in traditional testing methods, improves testing efficiency and energy utilization efficiency, and enhances the system's versatility and adaptability.
Patent Information
- Application Number
- CN202423198242.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2034-12-24
AI Technical Summary
Traditional charging pile testing methods require actual connection of electric vehicles for charging tests, resulting in high testing costs, low efficiency and energy waste. Furthermore, existing simulated loads have issues of energy waste or grid dependence.
Design an AC charging pile energy-saving simulated load including a charging pile simulated load host and a battery box. By simulating the on-board charger (OBC) function and a large-capacity battery pack, it enables charging pile testing without the participation of electric vehicles, and supplies power to external devices through an inverter unit, reducing energy conversion links.
Reduce testing and time costs, improve energy efficiency, enhance system versatility and adaptability, reduce dependence on traditional power grids, and promote the use of renewable energy.
Smart Images
Figure CN223842027U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of charging pile testing technology, specifically to an energy-saving simulated load for AC charging piles. Background Technology
[0002] With the rapid development of the electric vehicle industry, charging piles, as an important supporting facility for electric vehicles, directly affect the charging efficiency and safety of electric vehicles. Therefore, charging piles need to undergo rigorous charge and discharge tests during development and testing. Traditional charging pile testing methods usually require actual connection to an electric vehicle for charging tests to verify key indicators such as output power and stability of the charging pile. However, this method not only increases testing costs but is also limited by the availability of electric vehicles and the testing environment, resulting in low testing efficiency.
[0003] In actual testing, the electric vehicle, acting as the load for the charging station under test, incurs energy loss during its charging process. This not only affects the accuracy of the test but also wastes energy. Furthermore, due to the varying models and battery capacities of electric vehicles, frequent replacements or adjustments are required during testing, further increasing the cost and complexity of the test.
[0004] To overcome the shortcomings of traditional testing methods, some charging pile simulated loads have emerged on the market, mainly of two types: resistive loads and energy feedback loads. Resistive loads convert all electrical energy into heat energy, resulting in a huge waste of energy; while energy feedback loads can feed electrical energy back to the grid, their application is limited by the grid's acceptance capacity and stability requirements in practical applications. Utility Model Content
[0005] The purpose of this invention is to propose an energy-saving simulated load for AC charging piles, which can save energy and reduce testing costs.
[0006] To achieve the above objectives, this disclosure provides an energy-saving simulated load for an AC charging pile, including a charging pile simulated load host and a battery box. The charging pile simulated load host includes a charging gun socket, an OBC simulation unit, and an output interface. The charging gun socket is used to connect to the charging gun of the charging pile. The OBC simulation unit is used to simulate the function of an on-board charger (OBC), and the output interface is used to directly output the AC power input from the charging pile. The battery box includes a high-capacity battery pack, an inverter unit, and an AC output interface. The inverter unit is connected to the high-capacity battery pack and is used to convert the DC power output from the battery into AC power. The AC output interface is used to provide AC power to external electrical equipment.
[0007] Beneficial effects of the basic solution: Traditional charging pile testing typically requires actual connection of electric vehicles for charging tests, which not only increases testing costs but is also limited by the availability of electric vehicles and the testing environment. However, this technical solution allows for comprehensive testing of charging piles without the need for actual electric vehicles, significantly reducing testing costs and time.
[0008] By using the OBC simulation unit in the charging pile's simulated load host, the working state of the on-board charger (OBC) can be simulated without actually connecting to an electric vehicle for charging, thus avoiding energy loss during the charging process. Furthermore, when the electrical energy output from the charging pile is not directly used for simulated charging, it can be directly output through the output interface, reducing unnecessary energy conversion steps and improving energy utilization efficiency.
[0009] This simulated load system can flexibly adjust its operating mode as needed. For example, when testing the performance of a charging pile, simulated charging can be performed through the OBC simulation unit to verify key indicators such as the charging pile's output power and stability. When power is needed for external devices, the inverter unit in the battery box can convert the DC power of the large-capacity battery pack into AC power and provide power through the AC output interface, enhancing the system's versatility and adaptability.
[0010] By using large-capacity battery packs as energy storage units and inverter units to power external devices when necessary, this technology helps reduce dependence on the traditional power grid and promotes the utilization of renewable energy and sustainable energy development.
[0011] The charging pile simulation load host and battery box are designed relatively independently. The battery box is designed independently, and more charging gun sockets can be added as needed to support the parallel testing of more charging piles. The battery box can also be replaced after the large-capacity battery pack is fully charged. Replacing the battery box includes replacing it with a battery box of the same or different capacity.
[0012] As a feasible preferred solution, the charging gun holder is provided with a signal interface and a power interface, which are respectively used for signal docking and power transmission with the charging gun of the charging pile, thereby realizing signal docking and power transmission.
[0013] As a feasible preferred embodiment, the OBC simulation unit is also used to monitor the AC power input to the charging gun and shut off the output in case of an anomaly.
[0014] As a feasible preferred solution, the OBC simulation unit stores the communication protocols and charging strategies of on-board chargers for electric vehicles of different brands and models.
[0015] As a feasible preferred solution, the charging pile simulated load host also includes a human-machine interface, which includes a keyboard, a display and indicator lights, for setting the working mode and displaying the system operating status and alarm information.
[0016] As a feasible preferred embodiment, the high-capacity battery pack is composed of multiple individual cells connected in series or parallel, used to convert electrical energy into chemical energy during charging and chemical energy into electrical energy during discharging.
[0017] As a preferred feasible option, the battery box also includes a battery pack protection unit located around or inside the large-capacity battery pack for monitoring the voltage and temperature of individual cells in the large-capacity battery pack and for performing energy balancing and charge / discharge protection.
[0018] As a feasible preferred embodiment, the battery box further includes a charging control unit, which is connected to an inverter unit to convert the AC power from the charging interface into a constant current and constant voltage power supply for charging the large-capacity battery pack, and then charges the large-capacity battery pack through the battery pack protection unit.
[0019] As a feasible preferred embodiment, the inverter unit is also used to provide over-temperature protection, leakage protection, over-current protection and over-voltage protection, and to disconnect the output circuit when an abnormality in output current or voltage is detected.
[0020] As a preferred feasible option, the battery box also includes a power display unit for monitoring and displaying the power of the large-capacity battery pack. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the structure of an energy-saving simulated load for an AC charging pile. Detailed Implementation
[0022] To make the technical solution and advantages of this application clearer, the technical solution of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of this utility model, and are only used to explain this application, not to limit it. It should be noted that the technical features or combinations of technical features described in the following embodiments should not be considered isolated; they can be combined with each other to achieve better technical effects. The same reference numerals appearing in the accompanying drawings of the following embodiments represent the same features or components, and can be applied to different embodiments.
[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection (including various forms of mechanical connection, such as couplings or gear pairs), or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0024] Furthermore, unless otherwise defined, the technical or scientific terms used in this description shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.
[0025] The present invention will now be described in further detail with reference to the accompanying drawings:
[0026] Reference Figure 1 An energy-saving simulated load for AC charging piles includes a charging pile simulated load host and a battery box. The battery box is used for energy storage and is equivalent to a high-capacity power bank that can output 220V / 380V 50Hz AC power, which can power other electrical devices. The battery box can be replaced after it is fully charged.
[0027] The charging pile simulated load host is used to interface with the charging gun and directly outputs the 220V or 380V power input from the charging pile through the output interface without any conversion, reducing energy loss caused by conversion. The charging pile simulated load host outputs 220V or 380V AC power for charging the battery box, achieving energy saving by storing and reusing electrical energy.
[0028] The charging pile simulated load host includes a charging gun holder, an OBC simulation unit, a human-machine interface, and an output interface.
[0029] The charging gun holder, located at the front end of the charging pile's simulated load host, is used to connect to the charging gun of the charging pile. The charging gun holder has a signal interface and a power interface inside, which are used to connect the signal and transmit power to the charging gun of the charging pile, respectively.
[0030] The OBC simulation unit is located inside the charging pile's simulated load host and is connected to the charging gun socket via internal circuitry. Utilizing existing technology, the OBC simulation unit simulates the functions of the on-board charger (OBC), handling charging gun interface signals, battery voltage, current, power level, communication protocols, and various anomalies. It also monitors the 220V or 380V AC input to the charging gun and can shut off the 220V / 380V output in case of an anomaly. The OBC simulation unit accepts configuration management via a human-machine interface.
[0031] In one embodiment, the OBC simulation unit is capable of simulating the communication protocols and charging strategies of on-board chargers for electric vehicles of different brands and models.
[0032] The human-machine interface includes a keyboard, a display, and indicator lights, used to set the operating mode and display the system's operating status and alarm information. The system operating status includes normal, abnormal, charging, and discharging. In one embodiment, the human-machine interface is located on the side or top of the charging pile's simulated load host. Configuration information such as the operating mode and parameters can be input via the keyboard and displayed on the monitor.
[0033] The output interface is used to directly output the 220V or 380V AC power input from the charging pile without any conversion, thereby reducing energy loss. The output interface is also used for charging the battery box; when the battery box needs charging, the charging pile's simulated load host transmits electrical energy to the battery box through this interface. In one embodiment, the output interface is located at the rear end or side of the charging pile's simulated load host.
[0034] The battery box includes a high-capacity battery pack, a battery pack protection unit, a charging control unit, an inverter unit, a power display unit, and an AC output interface.
[0035] A high-capacity battery pack, located inside a battery box, serves as an energy storage element, converting electrical energy into chemical energy during charging and converting chemical energy back into electrical energy during discharging. In one embodiment, the high-capacity battery pack is composed of multiple individual cells connected in series or parallel, capable of storing a large amount of electrical energy.
[0036] The battery pack protection unit is located around or inside the large-capacity battery pack. It is used to monitor parameters such as voltage and temperature of individual battery cells, and to perform energy balancing and charge / discharge protection to prevent abnormal conditions such as overcurrent, overvoltage, overcharge, over-discharge, and over-temperature, thus ensuring the safety of the battery pack.
[0037] The inverter unit, located inside the battery box and connected to the high-capacity battery pack, converts the DC power output from the battery into 220V / 380V 50Hz AC power, which is then supplied to external electrical equipment via the AC output interface. The inverter unit also features overcurrent, overvoltage, and leakage protection functions. When an abnormal output current or voltage is detected, it immediately disconnects the output circuit to protect equipment and personnel safety.
[0038] The charging control unit, located inside the battery compartment and connected to the inverter unit, converts the 220V / 380V 50Hz AC power from the charging interface into a constant current and constant voltage power supply for charging the battery pack. This power then passes through the battery pack protection unit to charge the large-capacity battery pack. The charging control unit automatically adjusts the charging current and voltage according to the battery pack's charge level and charging requirements, ensuring safe and efficient charging of the large-capacity battery pack.
[0039] The power display unit, located on the side or top of the battery compartment, is used to monitor and display the power level of the large-capacity battery pack. The power display unit can display information such as the remaining power level and charging status of the battery in real time, making it convenient for users to understand the battery status and charging progress.
[0040] The AC output interface, located on the side or rear of the battery box, is used to provide 220V / 380V 50Hz AC power to external electrical devices. When external electrical devices need power, the battery box outputs the stored electrical energy to the devices through this interface.
[0041] The working principle is as follows:
[0042] During charging pile testing, the charging pile simulated load host is connected to the charging gun of the charging pile via the charging gun socket to simulate the function of an on-board charger (OBC) for charging and discharging tests. The electrical energy generated during the test is transmitted to the battery box for storage through the output interface. The large-capacity battery pack in the battery box converts the electrical energy into chemical energy for storage. When external electrical equipment requires power, the battery box uses an inverter unit to convert the stored DC power into 220V / 380V 50Hz AC power and supplies power to the equipment through the AC output interface. Simultaneously, the battery box's power display unit displays the battery's power information in real time, allowing users to easily understand the battery status and charging progress.
[0043] The above content is merely an embodiment of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can improve and implement this solution based on the guidance provided in this application and their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. An energy-saving simulated load for an AC charging pile, characterized in that: The system includes a charging pile simulation load host and a battery box. The charging pile simulation load host includes a charging gun holder, an OBC simulation unit, and an output interface. The charging gun holder is used to connect to the charging gun of the charging pile. The OBC simulation unit is used to simulate the function of an on-board charger (OBC), and the output interface is used to directly output the AC power input from the charging pile. The battery box includes a large-capacity battery pack, an inverter unit, and an AC output interface. The inverter unit is connected to the large-capacity battery pack and is used to convert the DC power output from the battery into AC power. The AC output interface is used to provide AC power to external electrical equipment.
2. The AC charging pile energy-saving simulated load according to claim 1, characterized in that: The charging gun holder is equipped with a signal interface and a power interface, which are respectively used for signal connection and power transmission with the charging gun of the charging pile.
3. The AC charging pile energy-saving simulated load according to claim 1, characterized in that: The OBC simulation unit is also used to monitor the AC power input to the charging gun and shut off the output in case of an abnormality.
4. The AC charging pile energy-saving simulated load according to claim 3, characterized in that: The OBC simulation unit stores the communication protocols and charging strategies of on-board chargers for electric vehicles of different brands and models.
5. The AC charging pile energy-saving simulated load according to claim 1, characterized in that: The charging pile simulated load host also includes a human-machine interface, which includes a keyboard, a display and indicator lights, for setting the working mode and displaying the system operating status and alarm information.
6. The AC charging pile energy-saving simulated load according to claim 1, characterized in that: The high-capacity battery pack is composed of multiple individual cells connected in series or parallel, used to convert electrical energy into chemical energy during charging and chemical energy into electrical energy during discharging.
7. The AC charging pile energy-saving simulated load according to claim 6, characterized in that: The battery box also includes a battery pack protection unit, located around or inside the large-capacity battery pack, for monitoring the voltage and temperature of individual cells in the large-capacity battery pack, and for performing energy balancing and charge / discharge protection.
8. The AC charging pile energy-saving simulated load according to claim 7, characterized in that: The battery box also includes a charging control unit, which is connected to an inverter unit to convert AC power from the charging interface into a constant current and constant voltage power supply for charging the large-capacity battery pack, and then charges the large-capacity battery pack through the battery pack protection unit.
9. The AC charging pile energy-saving simulated load according to claim 1, characterized in that: The inverter unit is also used to provide over-temperature protection, leakage protection, over-current protection and over-voltage protection, and to cut off the output circuit when an abnormal output current or voltage is detected.
10. The AC charging pile energy-saving simulated load according to claim 1, characterized in that: The battery box also includes a power display unit for monitoring and displaying the power of the large-capacity battery pack.