Charging pile device for charging trolley and charging trolley for new energy vehicle

Abstract

The utility model provides a charging pile device for a charging trolley and the charging trolley for a new energy vehicle. The charging pile device comprises a charging pile body, a charging pile controller and a charging base. The charging base is arranged on the charging pile body and used for being connected with a charging gun of the charging trolley. The charging pile controller is connected with the charging base, and the charging pile controller is used for controlling the charging pile to supply power to the charging trolley; a first detection pin of the charging seat is grounded, and the first detection pin is used for being connected with a first detection pin of a charging gun of a charging trolley so as to judge the state of the charging trolley according to a voltage value after connection; and a second detection pin of the charging seat is connected with an internal power supply of the charging pile controller, and the second detection pin is used for being connected with a second detection pin of a charging gun of the charging trolley so as to judge the connection state of the charging trolley and the charging seat according to a voltage value after connection. By adopting the charging pile device, the structure of the charging pile can be simplified, and maintenance and use of the charging pile are facilitated.

Description

Technical Field

[0001] This application relates to the field of charging for new energy vehicles and the field of charging carts. Specifically, it relates to a charging pile device for a charging cart and a charging cart for a new energy vehicle. Background Art

[0002] Currently, a charging cart for charging new energy vehicles can store electric energy in its own battery and then use the electric energy stored in the battery to charge the vehicle to be charged. Due to the mobility of the charging cart, the charging scenario is expanded, providing more convenience for charging new energy vehicles.

[0003] The charging cart can obtain the electric energy it needs from the charging pile through connection with the charging pile, and this process is called the energy replenishment process of the charging cart. During the energy replenishment process, the charging gun on the charging pile is inserted into the charging socket of the charging cart, and a connection is established between the charging gun and the charging seat of the charging cart to form an energy replenishment channel. Such a charging cart not only has a charging seat as an energy replenishment interface, but also often has a discharging gun for delivering the electric energy stored in the charging cart to the new energy vehicle to be charged.

[0004] The charging cart can also cancel the charging socket and integrate charging and energy replenishment into the same gun for energy replenishment. Correspondingly, the charging gun of the charging pile needs to be improved to meet the energy replenishment requirements of the charging cart. Summary of the Utility Model

[0005] This application provides a charging pile device for a charging cart. The charging pile device adopting this solution can simplify the structure of the charging pile, facilitating the maintenance and use of the charging pile. This application also provides a charging cart for a new energy vehicle. The charging pile device and the charging cart are used in combination, so the structures of the charging pile and the charging cart correspond to each other.

[0006] The charging pile device for a charging cart provided by this application includes a charging pile main body, a charging pile controller, and a charging seat;

[0007] The charging seat is arranged on the charging pile main body and is used for connecting with the charging gun of the charging cart;

[0008] The charging pile controller is connected to the charging seat, and the charging pile controller is used to control the charging pile to supply power to the charging cart;

[0009] The first detection pin of the charging seat is grounded, and the first detection pin is used for connecting with the first detection pin of the charging gun of the charging cart to judge the state of the charging cart according to the voltage value after connection;

[0010] The second detection pin of the charging base is connected to the internal power supply of the charging pile controller. The second detection pin is used to connect to the second detection pin of the charging gun of the charging cart, so as to judge the connection state between the charging cart and the charging base according to the voltage value after connection.

[0011] Optionally, the first detection pin of the charging base is grounded after being connected in series with a first resistor, so as to change the voltage value after the charging base and the charging gun are connected;

[0012] The second detection pin of the charging base is connected to the internal power supply of the charging base controller after being connected in series with a second resistor, so as to judge the connection state between the charging cart and the charging base according to the voltage value after connection.

[0013] Optionally, the resistance value of the first resistor is different from that of the fifth resistor, and is used to distinguish the voltage value after connection from the voltage value of the charging gun and the target vehicle; the fifth resistor is the resistor in the charging interface of the target vehicle.

[0014] Optionally, the charging base includes a first electromagnetic induction suction mechanism, which is used to suck with the second electromagnetic induction suction mechanism arranged on the charging gun when the charging gun of the charging cart approaches, so as to automatically suck the charging base and the charging gun.

[0015] Optionally, when the charging base is connected to the charging gun of the charging cart, there is a first voltage at the first detection pin of the charging base, and the first voltage is used to judge whether the charging cart is in a preparatory energy replenishment state.

[0016] Optionally, when the charging base is connected to the charging gun of the charging cart, there is a second voltage at the second detection pin of the charging base, and the second voltage is used to judge whether the charging cart is connected to the charging base of the charging pile.

[0017] The present application also provides a charging cart for a new energy vehicle, including a charging gun, a cart body and a battery;

[0018] The charging gun is arranged on the cart body, and the charging gun is connected to the battery through a wire;

[0019] The third detection pin of the charging gun is grounded. The third detection pin is used to connect to the first detection pin of the charging base of the charging pile device, so as to judge the state of the charging cart according to the voltage value after connection;

[0020] The fourth detection pin of the charging gun is grounded. The fourth detection pin is used to connect to the second detection pin of the charging base of the charging device, so that the charging base can judge the connection state of the charging cart according to the voltage value after connection.

[0021] Optionally, the first detection pin of the charging gun is grounded after being connected in series with a third resistor, so as to judge the state of the charging cart according to the voltage value after connection when the charging gun is connected to the charging base;

[0022] The second detection pin of the charging gun is grounded after being connected in series with a fourth resistor, so that the charging base can judge the connection state between the charging cart and the charging base according to the voltage value after connection when the charging gun is connected to the charging base.

[0023] Optionally, when the charging cart is connected to the charging pile, the third detection pin of the charging gun is connected to the first detection pin of the charging pile, and there is a first voltage at the third detection pin of the charging gun, and the first voltage is used to judge whether the charging cart is in a charging state;

[0024] When the charging cart is connected to the charging pile, there is a second voltage at the fourth detection pin of the charging gun, and the second voltage is used for the charging base to judge whether the charging cart is connected to the charging pile.

[0025] Optionally, the charging gun includes a second electromagnetic induction suction mechanism, which is used to suck with the first electromagnetic induction suction mechanism arranged on the charging base when the charging base of the charging device approaches, so as to automatically suck the charging base and the charging gun.

[0026] Compared with the prior art, the charging pile device for a charging cart provided by the present application sets the charging base on the charging pile main body, and controls and manages the charging pile through a charging pile controller. The charging pile provided with the charging base provides charging conditions for the charging cart that uses a charging gun for energy replenishment. The structure and cost of the charging base are relatively simple and low compared with the charging gun, which has more popularization significance. The charging pile controller controls the charging pile to supply power to the charging cart through the charging base. At the same time, the first detection pin arranged in the charging base provides a technical basis for the charging cart to detect the type of external device; the second detection pin arranged in the charging base provides technical support for confirming the connection state between the charging cart and the charging pile.

[0027] The charging cart for a new energy vehicle provided by the present application is provided with a third detection pin and a fourth detection pin. By being used in combination with the aforementioned charging pile device, it provides a technical basis for the charging cart to detect the type of external device and for the charging base to confirm the connection state. The charging cart adopting this solution can realize double detection of the connection state and the type of connected device (whether the standby state is for energy replenishment), thereby improving the safety factor of the charging cart and the charging pile. The combined use of the charging cart with the charging pile device and the charging cart can improve the operation efficiency of the charging cart, and the structure is simple and more convenient for users to operate. Description of the Drawings

[0028] Figure 1Schematic diagram of the application scenario of the charging pile device for the charging cart provided by the embodiment of the present application.

[0029] Figure 2 Schematic diagram of the structure of the charging pile device for the charging cart provided by the first embodiment of the present application.

[0030] Figure 3 Schematic diagram of the structure of the charging pile device provided by the first embodiment of the present application.

[0031] Figure 4 Schematic diagram of the structure of the charging cart for new energy vehicles provided by the second embodiment of the present application.

[0032] Figure 5 Schematic diagram of the internal structure of the charging gun provided by the second embodiment of the present application.

[0033] Figure 6 Schematic diagram of the first loop structure formed by the charging gun and the charging seat of the charging cart provided by the second embodiment of the present application.

[0034] Figure 7 Schematic diagram of the second loop structure formed by the charging cart and the charging seat provided by the second embodiment of the present application.

[0035] Reference numerals:

[0036] 101: Charging pile, 201: Charging seat, 202: Charging pile main body, 203: Charging pile controller;

[0037] 301: First detection pin of the charging seat, 302: Second detection pin of the charging seat, 301-1: First resistor, 302-2: Second resistor;

[0038] 102: Charging cart, 1021: Charging gun, 401: Cart main body, 501: Third detection pin of the charging gun, 502: Fourth detection pin of the charging gun, 501-3: Third resistor, 502-4: Fourth resistor. Detailed implementation manners

[0039] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementations disclosed below. In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0040] In addition, the terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0041] In the present application, unless otherwise clearly defined and limited, the terms "installed", "connected", "coupled", "fixed", "arranged", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0042] The embodiments of the present application provide a charging pile device for a charging cart, which will be described below with reference to the accompanying drawings.

[0043] Please refer to Figure 1 , Figure 1 which is a schematic diagram of the application scenario of the charging pile device for the charging cart provided by the embodiments of the present application.

[0044] In the prior art, a charging pile is used to charge a target vehicle to be charged, and a charging gun is provided on the charging pile. Inserting the charging gun of the charging pile into the charging interface of the target vehicle can perform the charging task of the target vehicle. In the present application, the charging pile is used to replenish energy for the charging cart. The charging cart first replenishes electric energy from the charging pile and stores the electric energy in the battery pack, and then the charging cart transmits the electric energy stored in the battery pack to the new energy vehicle to be charged. Therefore, the charging cart in this embodiment is a portable energy storage device.

[0045] In this application, a charging seat 201 is provided on the charging pile 101, and a charging gun 1021 is provided on the matching charging cart 102. When the charging gun of the charging cart is inserted into the charging seat of the charging pile, the charging pile starts to charge the charging cart. When the charging cart completes the energy replenishment, the charging gun of the charging cart can be pulled out from the charging seat of the charging pile.

[0046] The first embodiment

[0047] The first embodiment of this application provides a charging pile device for a charging cart. Please refer to Figure 2 , Figure 2 which is a schematic structural diagram of the charging pile device for a charging cart provided by the first embodiment of this application.

[0048] The charging pile device for a charging cart provided by this application is characterized by including a charging pile main body 202, a charging pile controller 203, and a charging seat 201.

[0049] The charging pile main body 202, as the basic part of the charging pile, is generally fixed on the ground or the wall. Other components, interfaces, etc. can be set on it.

[0050] The charging pile controller, as the control part of the charging pile, is responsible for managing and controlling all aspects of the charging pile, including functions such as safety during the charging process, adjustment of charging power, data recording, and user authentication. For example, the charging pile controller can be responsible for starting and stopping the charging process, adjusting the charging power and charging duration according to the needs of the vehicle to be charged and the user; usually connected to the network and can be remotely monitored and managed through the Internet, including remotely starting and stopping charging, fault diagnosis, and firmware upgrade; detecting the safety status during the charging process, such as parameters like voltage, current, and temperature, to ensure the safety and reliability of the charging process and avoid overload or overheating; recording data during the charging process, such as the charging time and charging amount, which can be used for reporting and statistical analysis to help operators and users understand the charging situation; detecting the fault situation of the charging pile and giving an alarm in time or sending an alarm through the remote management system for repair and maintenance. In public charging piles, the charging pile controller is also responsible for processing user authentication and payment information to ensure that only authorized users can use the charging service and payment settlement can be carried out.

[0051] The charging pile controller 203 in this application can be set inside the charging pile main body 202. On the basis of the above description, the charging pile controller 203 is responsible for starting and stopping the charging process and adjusting the charging power and charging duration according to the needs of the charging cart to achieve the charging management of the charging cart.

[0052] The charging base 201 is an interface corresponding to the charging gun of the charging cart, made of metal or durable plastic, and is used to connect with the charging gun plug of the charging cart. The charging base has the characteristics of being waterproof, dustproof and durable to ensure normal operation under various weather conditions outdoors. To ensure that the plug (charging gun) does not accidentally fall off during the charging process, a socket locking mechanism is usually set in the charging base to fix the plug.

[0053] The charging base 201 is arranged on the charging pile main body 202 and is used to connect with the charging gun 1021 of the charging cart. The type of the charging base can be specifically designed according to the interface of the vehicle to be connected. For example, CHAdeMO (DC fast charging standard) socket, CCS (Combined Charging System) socket, GB / T (i.e., GB / T 20234.2 - 2017, national standard / general interface), Type 2 (IEC 62196 - 2 plug or European charging interface) socket, etc. When the charging base and the charging gun are a DC charging base and a DC charging gun respectively, the direct current is transmitted between them, and a circuit structure for converting alternating current into direct current should be set in the internal connection circuit of the charging base.

[0054] The charging pile controller 203 is connected to the charging base 201, and the charging pile controller 203 is used to control the charging pile to supply power to the charging cart. The charging pile controller 203 controls the power on, communication and detection between the charging cart and the charging pile, controls the circuit in the charging base 201 and the charging gun to form a charging loop, and conducts data transmission and power transmission through the charging loop, etc.

[0055] The main purpose of the connection between the charging gun and the charging base is to transmit electric energy. Generally speaking, the typical AC charging power can range from 3.3 kilowatts to 22 kilowatts. The power of DC fast charging can range from 50 kilowatts to 350 kilowatts or even higher. In addition, the power capacity of domestic charging piles is developing rapidly, especially the DC fast charging technology. New charging stations and charging piles usually support higher power to meet the growing demand of the electric vehicle market. Therefore, the connection situation between the charging gun and the charging base is directly related to safety issues. Therefore, it is crucial to ensure the connection situation between the charging gun and the charging base. In this regard, this embodiment provides double detection to ensure that the charging gun and the charging base are correctly connected before energy replenishment. The double detection includes: the charging pile detects whether the charging gun is successfully connected to the charging pile; the charging gun detects the type of the external device currently connected to determine whether the connection is successful. There is no necessary sequence between the two, but both need to be confirmed before the next step can be carried out.

[0056] Please refer to Figure 3 , Figure 3Schematic diagram of the charging pile device provided by the first embodiment of this application. The first detection pin 301 of the charging base is grounded. The first detection pin 301 is used to connect with the first detection pin of the charging gun of the charging cart, so as to judge the state of the charging cart according to the voltage value after connection.

[0057] The first detection pin 301 is arranged on the charging base. When the charging gun is connected to the charging base, a path is formed after the third detection pin of the charging gun contacts the first detection pin 301 of the charging base. This path is used for the charging gun to judge whether the charging cart is in the state of preparing for energy replenishment.

[0058] The second detection pin 302 of the charging base is connected to the internal power supply of the charging pile controller. The second detection pin is used to connect with the fourth detection pin of the charging gun of the charging cart, so as to judge the connection state between the charging cart and the charging base according to the voltage value after connection. The internal power supply of the charging pile controller is mainly used to provide voltage for the internal structure of the charging gun, and its value is usually 12V. The second detection pin 302 is arranged on the charging base. When the charging gun is plugged into the charging base, a path is formed after the fourth detection pin of the charging gun contacts the second detection pin 302 of the charging base. Measuring the voltage on this path can judge whether the charging gun is connected to the charging base.

[0059] In one implementation, the first detection pin 301 of the charging base is grounded after being serially connected with a first resistor 301-1 to change the voltage value after the charging base is connected to the charging gun. The voltage value includes the voltage value at the first detection pin 301.

[0060] The second detection pin 302 of the charging base is serially connected with a second resistor 302-2 and then connected to the internal power supply of the charging base controller, so as to judge the connection state between the charging cart and the charging base according to the voltage value after connection. The internal power supply of the charging pile controller supplies power to this path. The voltage value includes the voltage value at the second detection pin 302.

[0061] The charging gun can be used to charge the target vehicle. The third detection pin of the charging gun is connected inwardly to the internal power supply of the charging pile controller, and the voltage on the internal power supply is 12V. There is a charging interface in the target vehicle, usually a charging socket. When the target vehicle needs to be charged, the charging gun is inserted into the charging socket. After connecting the charging path, the charging task of the target vehicle can be executed. The target vehicle is the new energy vehicle to be charged. In the charging socket of the target vehicle, a 1kΩ resistor is often provided. When the charging gun is connected to the charging socket, the floating wire led out from the first detection pin of the charging gun will be connected to the pin with 1kΩ in the charging interface of the target vehicle. At this time, there is a voltage value at the pin of the charging gun. If the connection is successful, usually this voltage value is 4V. Therefore, if the charging gun is also to be used to connect to the charging pile and replenish energy for the charging cart, it is necessary to make the voltage at the first detection pin of the charging gun not 4V. The difference in voltage values can be used as an intuitive judgment basis for whether the device connected by the charging gun is the target vehicle or the charging pile.

[0062] In one embodiment, the resistance value of the first resistor is different from that of the fifth resistor, which is used to distinguish the voltage value after connection from the voltage value when the charging gun is connected to the target vehicle; the fifth resistor is the resistor in the charging interface of the target vehicle.

[0063] The charging interface of the target vehicle is usually provided with a 1kΩ fifth resistor. Therefore, in order to distinguish the type of device connected by the charging gun through the voltage value, theoretically, it is only necessary that the resistance value of the first resistor is different from that of the fifth resistor.

[0064] For example, when the value of the first resistor is 270 ohms, when the charging gun is plugged into the charging socket of the charging pile, a voltage of about 2.1V will be obtained at the third detection pin of the charging gun. Thus, the charging gun can determine the type of the external device by judging the voltage value of the third detection pin. The voltage value is the first voltage value.

[0065] In one embodiment, the charging stand includes a first electromagnetic induction suction mechanism, which is used to suck with a second electromagnetic induction suction mechanism provided on the charging gun when the charging gun of the charging cart approaches, so as to automatically suck the charging stand and the charging gun together. Electromagnetic coils are built into the charging stand and the charging gun respectively. The electromagnetic induction coil in the first electromagnetic induction suction mechanism on the charging stand generates an electromagnetic field with a specific frequency. When the charging gun of the charging cart approaches the charging stand, the electromagnetic induction coil in the charging gun will sense the electromagnetic field generated by the charging stand. When sufficient electromagnetic signals are sensed, the control circuit of the second electromagnetic induction suction mechanism in the charging gun will be triggered, causing the electromagnetic coil in the charging gun to generate a reverse electromagnetic field, which interacts with the electromagnetic field of the charging stand, so that the charging gun is adsorbed on the charging stand, establishing a connection for power transmission. Correspondingly, when the charging gun stops power transmission and is about to be pulled out and disconnected from the charging stand, the electromagnetic induction coils on the charging stand and the charging gun generate a co-directional electromagnetic field, resulting in a repulsive force between the charging gun and the charging stand, which makes it easy to disconnect the charging gun and the charging stand, helping to protect the contact points of the charging gun and the charging stand and facilitating connection, etc.

[0066] When the charging stand is connected to the charging gun of the charging cart, there is a first voltage at the first detection pin of the charging stand, and the first voltage is used to determine whether the charging cart is in a preparatory energy replenishment state.

[0067] In one embodiment, a 270Ω resistor is provided in the charging stand of the charging pile to distinguish the types of devices connected by the charging gun, and then determine whether the charging cart is in a preparatory energy replenishment state or in a preparatory charging state. The preparatory energy replenishment state means that the charging gun is successfully connected to the charging stand and the energy replenishment process can be entered. The preparatory charging state means that the charging gun is successfully connected to the charging interface of the target vehicle and the process of charging the target vehicle can be entered. It should be noted that the 270Ω resistor is the preferred value provided in this embodiment, and the purpose is to distinguish the devices connected by the charging gun through different voltage values. Obviously, the resistance value here can be other values that can achieve the purpose of distinguishing the types of devices connected by the charging gun.

[0068] When the charging stand is connected to the charging gun of the charging cart, there is a second voltage at the second detection pin of the charging stand, and the second voltage is used to determine whether the charging cart is connected to the charging stand of the charging pile. The second voltage is used for the charging stand to judge the connection between the charging gun and the charging pile.

[0069] The charging pile device for the charging trolley provided in this embodiment is provided with a charging seat, which provides charging conditions for the charging trolley that uses a charging gun for energy replenishment. The first detection pin and the first resistor different from the fifth resistor in the interface acting as the target vehicle are provided in the charging seat. Furthermore, through the difference in voltage values, it can be distinguished whether the device externally connected to the charging trolley is a charging pile or a target vehicle. Therefore, it provides a technical basis for the charging trolley to detect the type of externally connected device; the second detection pin provided in the charging seat provides technical support for confirming the connection status between the charging trolley and the charging pile.

[0070] Second Embodiment

[0071] The second embodiment of the present application provides a charging trolley for a new energy vehicle, and the charging trolley corresponds to the charging device for the charging trolley provided in the foregoing embodiment. In this embodiment, only schematic descriptions are made for relevant parts, and for details, please refer to the foregoing embodiment.

[0072] The charging trolley for a new energy vehicle provided in this embodiment includes a charging gun, a trolley body, and a battery.

[0073] Please refer to Figure 4 , Figure 4 which is a schematic structural diagram of the charging trolley for a new energy vehicle provided in the second embodiment of the present application.

[0074] In the charging trolley 102, the charging gun 1021 is provided on the trolley body 401, and the charging gun is connected to the battery through a wire. When the charging trolley replenishes energy, the electric energy on the charging pile is stored in the battery of the charging trolley.

[0075] Please refer to Figure 5 , Figure 5 which is a schematic internal structure diagram of the charging gun provided in the second embodiment of the present application. The third detection pin 501 of the charging gun is grounded, and the third detection pin 501 is used to connect to the first detection pin of the charging seat of the charging pile device to judge the state of the charging trolley according to the voltage value after connection.

[0076] The fourth detection pin 502 of the charging gun is grounded, and the fourth detection pin is used to connect to the second detection pin of the charging seat of the charging device for the charging seat to judge the connection state of the charging trolley according to the voltage value after connection. When the charging gun is connected to the charging seat, one end of the fourth detection pin is grounded, and the other end contacts the second detection pin of the charging seat to form a path.

[0077] In one embodiment, the third detection pin 501 of the charging gun is grounded after being connected in series with a third resistor 501-3, so as to judge the state of the charging cart according to the voltage value after connection when the charging gun is connected to the charging base. The third resistor is usually set to 1 kΩ. The fourth detection pin 502 of the charging gun is grounded after being connected in series with a fourth resistor 502-4, so as to enable the charging base to judge the connection state between the charging cart and the charging base according to the voltage value after connection when the charging gun is connected to the charging base.

[0078] In one embodiment, when the charging cart is connected to the charging pile, the third detection pin of the charging gun is connected to the first detection pin of the charging pile, and the first resistor and the third resistor are connected in parallel to form a first loop. There is a first voltage at the third detection pin of the charging gun, and the first voltage is used to judge whether the charging cart is in the energy replenishment state.

[0079] When the charging cart is connected to the charging pile, the fourth detection pin of the charging gun is connected to the second detection pin of the charging base, and the second resistor and the fourth resistor are connected in series to form a second loop. There is a second voltage at the fourth detection pin of the charging gun, and the second voltage is used for the charging base to judge whether the charging cart is connected to the charging pile.

[0080] Please refer to Figure 6 , Figure 6 FIG. 13 is a schematic diagram of the first loop structure formed by the charging gun and the charging base of the charging cart provided in the second embodiment of the present application. At this time, if the charging gun is inserted into the charging base, the third detection pin 501 in the charging gun has the third resistor 501-3 and the first resistor 301-1 connected in parallel. The voltage value detected at the third detection pin 501 can be used to judge the state of the charging cart, that is, whether it is in the preliminary energy replenishment state. The voltage value detected at the third detection pin 501 is the first voltage value.

[0081] Please refer to Figure 7 , Figure 7 FIG. 17 is a schematic diagram of the second loop structure formed by the charging cart and the charging base provided in the second embodiment of the present application. At this time, if the charging gun is inserted into the charging base, the fourth detection pin 502 in the charging gun has the fourth resistor 502-4 and the second resistor 302-2 connected in series. The voltage value detected at the fourth detection pin 502 can be used to judge whether the charging cart is connected to the charging base. The voltage value detected at the fourth detection pin 502 is the second voltage value.

[0082] In one embodiment, the charging gun includes a second electromagnetic induction suction mechanism, which is used to suck with the first electromagnetic induction suction mechanism provided on the charging base when the charging base of the charging device approaches, so as to automatically suck the charging base and the charging gun together.

[0083] The charging trolley for new energy vehicles provided in this embodiment is provided with a third detection pin and a fourth detection pin. By being used in conjunction with the charging pile device in the foregoing embodiment, it provides a technical basis for the charging trolley to detect the type of external device and confirm the connection status of the charging seat. The charging trolley adopting this solution can achieve double detection of the connection status and the type of connected device (whether the standby state is for energy replenishment), thereby improving the safety factor of the charging trolley and the charging pile. The charging trolley and the charging pile device can improve the operation efficiency of the charging trolley when used in conjunction, and the structure is simple and more convenient for users to operate.

[0084] It should be noted that although several structures, components or units for implementing related functions are mentioned in the foregoing detailed description, this division is not mandatory. In fact, according to the specific implementation manner of the present application, the features and functions of two or more structures, components or units described above can be embodied in one structure, component or unit. Conversely, the features and functions of one structure, component or unit described above can be further divided and embodied by multiple components, structures or units.

[0085] In addition, although the components of the component or device in the present application and the installation manner between the components are described in a specific order in the drawings, this does not require or imply that the component or device must be designed according to this specific component or the installation manner between the components, or that all the shown components must be included to achieve the desired result. Additionally or alternatively, some components may be omitted, multiple components may be combined into one component to achieve the corresponding function, and / or one component may be decomposed into multiple components to achieve the corresponding function, etc.

[0086] Although the present application is disclosed above with preferred embodiments, it is not used to limit the present application. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application should be subject to the scope defined by the claims of the present application.

Claims

1. A charging pile device for a charging cart, characterized in that, It includes a charging pile main body, a charging pile controller and a charging base; The charging base is arranged on the charging pile main body and is used to connect with the charging gun of the charging cart; The charging pile controller is connected to the charging base, and the charging pile controller is used to control the charging pile to supply power to the charging cart; The first detection pin of the charging base is grounded, and the first detection pin is used to connect with the first detection pin of the charging gun of the charging cart to judge the state of the charging cart according to the voltage value after connection; The second detection pin of the charging base is connected to the internal power supply of the charging pile controller, and the second detection pin is used to connect with the second detection pin of the charging gun of the charging cart to judge the connection state between the charging cart and the charging base according to the voltage value after connection.

2. The charging pile device for a charging trolley according to claim 1, characterized in that, The first detection pin of the charging base is grounded after being connected in series with a first resistor to change the voltage value after the charging base and the charging gun are connected; The second detection pin of the charging base is connected to the internal power supply of the charging base controller after being connected in series with a second resistor to judge the connection state between the charging cart and the charging base according to the voltage value after connection.

3. The charging pile device for a charging cart according to claim 2, wherein, The resistance value of the first resistor is different from that of the fifth resistor, and is used to distinguish the voltage value after connection from the voltage value of the charging gun and the target vehicle; the fifth resistor is the resistor in the charging interface of the target vehicle.

4. The charging pile device for a charging trolley according to claim 1, characterized in that, The charging base includes a first electromagnetic induction suction mechanism, which is used to suck with the second electromagnetic induction suction mechanism arranged on the charging gun when the charging gun of the charging cart approaches, so as to automatically suck the charging base and the charging gun.

5. The charging pile device for a charging trolley according to claim 3, wherein, When the charging base is connected to the charging gun of the charging cart, there is a first voltage at the first detection pin of the charging base, and the first voltage is used to judge whether the charging cart is in a state of preparing for energy replenishment.

6. The charging pile device for a charging cart according to claim 2, wherein, When the charging base is connected to the charging gun of the charging cart, there is a second voltage at the second detection pin of the charging base, and the second voltage is used to judge whether the charging cart is connected to the charging base of the charging pile.

7. A charging cart for new energy vehicles, characterized in that, It includes a charging gun, a cart main body and a battery; The charging gun is arranged on the cart main body, and the charging gun is connected to the battery through a wire; The third detection pin of the charging gun is grounded, and the third detection pin is used to connect with the first detection pin of the charging base of the charging pile device to judge the state of the charging cart according to the voltage value after connection; The fourth detection pin of the charging gun is grounded, and the fourth detection pin is used to connect with the second detection pin of the charging base of the charging device for the charging base to judge the connection state of the charging cart according to the voltage value after connection.

8. The charging trolley for new energy vehicles according to claim 7, wherein, The first detection pin of the charging gun is grounded after being connected in series with a third resistor to judge the state of the charging cart according to the voltage value after the charging gun and the charging base are connected; The second detection pin of the charging gun is grounded after being connected in series with a fourth resistor for the charging base to judge the connection state between the charging cart and the charging base according to the voltage value after the charging gun and the charging base are connected.

9. The charging trolley for new energy vehicles according to claim 8, characterized in that, When the charging cart is connected to the charging pile, the third detection pin of the charging gun is connected to the first detection pin of the charging pile, and there is a first voltage at the third detection pin of the charging gun. The first voltage is used to determine whether the charging cart is in the energy replenishment state; When the charging cart is connected to the charging pile, the fourth detection pin of the charging gun is connected to the second detection pin of the charging base. The second resistor and the fourth resistor are connected in series, and there is a second voltage at the fourth detection pin of the charging gun. The second voltage is used for the charging base to determine whether the charging cart is connected to the charging pile.

10. The charging cart for new energy vehicles according to claim 7, wherein The charging gun includes a second electromagnetic induction suction mechanism, which is used to suck with the first electromagnetic induction suction mechanism provided on the charging base when the charging base of the charging device approaches, so as to automatically suck the charging base and the charging gun.

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