CN209544755U - A kind of safeguard protection interface of portable charging apparatus - Google Patents

Abstract

A safety protection interface for a portable charging device, including an AC input side plug and a charging gun head, the AC input side plug includes a plug-in triangular plug and an AC power supply cable, the plug-in triangular plug is provided with a socket connector, the One end of the AC power supply cable is plugged into the socket connector by setting a plug connector, and the other end of the AC power supply cable is connected to the AC/DC module in the portable charging device, and the output end of the AC/DC module is connected through the charging gun The cable is connected to the head of the charging gun, and the portable charging device is also equipped with a charging controller, which controls the circuit on and off of the AC power supply cable through an AC relay; the plug-in triangular plug includes a The three-pin pin on the housing is electrically connected to the socket connector. By means of the above technical solution, the safety protection interface of the portable charging device provided by the utility model can facilitate the user to use the charging device more safely and prolong the service life of the charging device.

Description

A safety protection interface for portable charging equipment

technical field

The utility model belongs to the field of electric vehicle charging systems, in particular to a safety protection interface of a portable charging device.

Background technique

With the popularization of new energy electric vehicles, the market demand for portable charging equipment is increasingly urgent, and the safety of portable charging equipment interfaces is becoming more and more prominent. At present, most of the input plugs on the AC side of portable charging equipment are household three-pin plugs, without live indication, grounding indication, temperature monitoring and live plug protection measures. During the charging process, if the plug is pulled out with power on, an arc will be generated, which will ablate the plug contacts and even burn the pulling personnel. In view of the above-mentioned defects in the existing charging interface, the inventor, based on years of rich practical experience and professional knowledge engaged in the design and manufacture of such products, after continuous research, design, and repeated trials and improvements, finally created Go out the utility model that really has practical value.

Utility model content

The purpose of the utility model is to overcome the defects existing in the interface of the existing portable charging equipment, and provide a safety protection interface of the portable charging equipment, so that users can use the charging equipment more safely and prolong the service life of the charging equipment.

The purpose of this utility model and its technical solution are to adopt the following technical solutions to achieve. According to the utility model, a safety protection interface of a portable charging device includes an AC input side plug and a charging gun head. The AC input side plug includes a plug-in triangular plug and an AC power supply cable. The plug-in triangular plug is provided with There is a socket connector, one end of the AC power supply cable is plugged with the socket connector by setting a plug connector, and the other end of the AC power supply cable is connected to the AC/DC module in the portable charging device, the AC/DC The output end of the module is connected to the charging gun head through the charging gun cable, and a charging controller is also provided in the portable charging device, and the charging controller controls the circuit on and off of the AC power supply cable through an AC relay; the plug-in type The triangular plug includes a three-pin pin arranged on its shell, and the three-pin pin is electrically connected with the socket connector.

The purpose of this utility model also adopts following technical measure to further realize.

The aforementioned safety protection interface, wherein the charging gun head is further provided with a DC gun head temperature sensor, and the DC gun head temperature sensor is connected to the charging controller for transmitting the temperature signal in the charging gun head.

In the aforementioned safety protection interface, fuses are provided on the positive and negative wires in the charging gun head.

The aforementioned safety protection interface, wherein the plug-in triangular plug is provided with an AC plug temperature sensor, and the AC plug temperature sensor is connected to the charging controller through a plugged socket connector and a plug connector.

The aforementioned safety protection interface, wherein the side of the housing of the plug-in triangular plug is provided with a manual touch switch, and the bottom of the housing is provided with an automatic touch switch, and the manual touch switch and the automatic touch switch are connected in series with each other and connected to the socket The device is electrically connected to realize signal transmission with the charging controller, and the automatic touch switch is located on the housing side where the triangular pin is located.

The aforementioned safety protection interface, wherein the plug-in triangular plug is also provided with an identification resistor, and the identification resistor is electrically connected to the charging controller through the plugged socket connector and plug connector.

The aforementioned safety protection interface, wherein the plug-in triangular plug has a charged indicator light.

The aforementioned safety protection interface, wherein the plug-in triangular plug has a grounding indicator light.

By virtue of the above technical solutions, compared with the prior art, the utility model at least has the following beneficial effects:

1. The utility model can realize the function of live indication on the AC side and grounding status indication. It has the function of prompting and can identify whether the power supply state is normal, prevent users from plugging in and out of power, and avoid users from charging in power sockets that lack protective ground wires.

2. The utility model can realize the monitoring of plug removal on the AC input side. Through the manual or automatic action of the touch switch, the charging controller can quickly cut off the power circuit, prevent arc generation, improve electricity safety, and ensure the service life of the plug.

3. The utility model is equipped with a fuse inside the low-power DC charging gun head to realize short-circuit protection for the charging gun line, and solves the problem of mismatch between the fuse at the car end and the portable charging gun line.

4. The utility model designs the triangular plug as a plug-in type, so that the triangular plug and the AC power supply cable are detachably electrically connected. On the one hand, it is easy to maintain when the electronic components inside the triangular plug are damaged; secondly, even if the triangular plug appears The burning phenomenon also only needs to replace the plug part, and does not need to be scrapped together with the AC power supply cable. On the other hand, the plug-in triangular plug can be designed with current levels such as 10A, 16A and 32A, and different identification resistors are configured inside the plug for identification, thus widening the application range of the present invention.

The above description is only an overview of the technical solution of the utility model. In order to understand the technical means of the utility model more clearly, it can be implemented according to the contents of the specification, and in order to make the above and other purposes, features and advantages of the utility model better It is obvious and easy to understand. The preferred embodiments are specifically cited below, together with the accompanying drawings, and detailed descriptions are as follows.

Description of drawings

Fig. 1 is a schematic diagram of the circuit principle of the utility model.

Fig. 2 is a schematic diagram of the composition of the portable charging device in the utility model.

3A to 3C are structural schematic diagrams of the plug-in triangular plug of the present invention.

Fig. 4 is a schematic diagram of the circuit connection relationship between the charged indicator light and the grounded indicator light in the utility model.

Fig. 5 is a schematic structural view of the charging gun head in the present invention.

Fig. 6 is a schematic diagram of the connection of the charging controller in the present invention.

Detailed ways

In order to further explain the technical means and effects of the utility model to achieve the intended purpose of the utility model, the specific implementation of a safety protection interface for a portable charging device proposed according to the utility model will be described below in conjunction with the accompanying drawings and preferred embodiments. Mode, structure, feature and effect thereof are as follows in detail.

Please refer to Fig. 1 to Fig. 6, a safety protection interface of a portable charging device of the present invention includes an AC input side plug and a charging plug 1, wherein the charging plug is a national standard DC charging plug.

The aforementioned AC input side plug includes a replaceable plug-in triangular plug 2 and an AC power supply cable 3 , and the two are electrically connected by plugging to transmit signals and electric energy. Specifically, the plug-in triangular plug 2 is provided with a socket connector 4 , and one end of the AC power supply cable 3 is electrically connected to the socket connector 4 through a plug connector 5 . The socket connector 4 and the plug connector 5 jointly form an existing common multi-core connector (i.e. a multi-core electrical connector), which can realize the AC power transmission between the plug-in triangular plug 2 and the portable charging device 6 and The signal transmission between the electronic components inside the plug and the charge controller in the portable charging device.

The other end of the AC power supply cable 3 is connected to the input end of the AC/DC module 7 in the portable charging device 6, and the output end of the AC/DC module 7 is connected to the charging head 1 through the charging wire 8, thereby realizing AC to DC conversion to facilitate charging of DC electric vehicles. The portable charging device 6 is also provided with a charging controller 9, the charging controller 9 controls the circuit on and off of the AC power supply cable 3 through the AC relay 10, the aforementioned charging controller 9 is a prior art, and it mainly receives external Various signals, such as current, voltage, temperature, communication and other signals, are output to control the on and off of the AC relay, and finally control the circuit on and off of the AC power supply cable.

The plug-in triangular plug 2 includes a three-pin pin 11 provided on its housing. One end of the three-pin pin 11 is electrically connected to the socket connector 4 , and the other end is used to connect to a power socket to obtain AC power. When working, the plug-in triangular plug 2 is inserted into the power supply socket, and the alternating current passes through the triangular pin 11, the socket connector 4, the plug connector 5, the AC power supply cable 3, the AC/DC module 7, the charging gun line 8, and the charging gun head 1 Output direct current for use by electrical equipment such as electric vehicles. Preferably, the plug-in three-pin plug 2 is provided with an identification resistor 12 connected to the charge controller. The plug-in three-pin plug can be of current levels such as 10A, 16A and 32A. Different plugs are equipped with identification resistors of different resistance values so as to Because the charging controller identifies the plug corresponding to the current level, so as to control the output current of the plug corresponding to the level.

Further, the charging gun head 1 is further provided with a DC gun head temperature sensor 13 , which is connected to the charging controller 9 for transmitting the temperature signal in the charging gun head 1 . Similarly, an AC plug temperature sensor 14 is provided in the plug-in triangular plug, and the AC plug temperature sensor 14 is electrically connected to the charging controller through a plugged socket connector and a plug connector, and is used for feedback plug charging. internal temperature. The charging controller 9 monitors the temperature of the gun head and the plug in real time, and controls the AC relay 10 to disconnect the power supply circuit when the temperature exceeds the protection threshold so as to stop charging.

Preferably, a fuse 15 is arranged inside the charging gun head. Due to the large fusing current of the electric vehicle charging interface fuse, it is impossible to realize short-circuit protection for the DC charging gun wire of the portable charging device. Therefore, a fuse matching the charging gun line is arranged on the DC power supply line inside the charging gun head. When a short circuit occurs in the DC charging circuit, the fuse can be blown in advance to realize the protection of the DC charging gun line.

In order to realize the safety protection of the AC side plug, a charging indicator light 16 and a grounding indicator light 17 are set on the plug-in triangular plug, and a manual touch switch 18 is provided on the side of the plug-in triangular plug housing, and a manual touch switch 18 is provided on the bottom of the housing. Automatic touch switch 19 is arranged. The manual touch switch and the automatic touch switch are connected in series and are electrically connected to the charge controller 9 after the plug and socket connectors are plugged in, so that the switch action signal is directly transmitted to the charge controller, so that the charge controller can cooperate The AC relay is used for stop flushing protection. The automatic touch switch 19 is located on the housing side where the triangular pin 11 is located, and the automatic touch switch is an automatic reset switch. When the plug-in triangular plug is inserted into the power supply socket, the charged indicator light and the grounding indicator light will light up, indicating that the AC power supply Normal; if not normal, the corresponding indicator light is off. Now the automatic touch switch 19 abuts against the panel of the power supply socket and is pressed down to close, and the manual touch switch 18 is manually closed, and the charging controller 9 detects the signal and starts the normal charging state. If there is a situation where the plug-in triangular plug 2 is pulled out, and the state of the manual and automatic touch switches changes from closed to off, the automatic touch switch 19 will automatically reset after the plug is pulled out to realize disconnection, and the charging controller 9 receives the disconnection After the signal, the AC relay 10 will be disconnected to stop rushing protection. Please refer to FIG. 4 , the charging indicator light 16 and the grounding indicator light 17 are connected in parallel with each other and connected to the AC power supply line between the triangular pin 11 and the socket connector 4 . Both indicator lights are connected in series with a resistor to realize voltage division protection, and both indicator lights are connected in parallel with a diode to realize voltage stabilization.

The above is only a preferred embodiment of the utility model, any skilled person who is familiar with the profession, without departing from the scope of the technical solution of the utility model, according to the technical essence of the utility model to any of the above embodiments Simple modifications, equivalent changes and modifications all still belong to the scope of the technical solutions of the present utility model.

Claims (8)

1. A safety protection interface of a portable charging device, comprising an AC input side plug and a charging gun head, characterized in that the AC input side plug includes a plug-in triangular plug and an AC power supply cable, and the plug-in triangular plug is provided with A socket connector, one end of the AC power supply cable is plugged into the socket connector by setting a plug connector, and the other end of the AC power supply cable is connected to the AC/DC module in the portable charging device, and the AC/DC module The output end is connected to the charging gun head through the charging gun wire, and a charging controller is also provided in the portable charging device, and the charging controller controls the circuit on and off of the AC power supply cable through an AC relay; the plug-in triangle The plug includes a three-pin pin arranged on the shell, and the three-pin pin is electrically connected with the socket connector. 2. The safety protection interface of a portable charging device according to claim 1, characterized in that: the charging gun head is also provided with a DC gun head temperature sensor, and the DC gun head temperature sensor is connected with the charging controller It is connected to transmit the temperature signal in the charging gun head. 3 . The safety protection interface of a portable charging device according to claim 1 , wherein a fuse is provided on the positive and negative wires in the charging gun head. 4 . 4. The safety protection interface of a portable charging device according to claim 1, characterized in that: the plug-in triangular plug is provided with an AC plug temperature sensor, and the AC plug temperature sensor is connected to the plug-in socket Connector and plug connector are connected with the charge controller. 5. The safety protection interface of a portable charging device according to claim 1, characterized in that: the side of the plug-in triangular plug housing is provided with a manual touch switch, and the bottom of the housing is provided with an automatic touch switch, The manual touch switch and the automatic touch switch are connected in series with each other and electrically connected to the socket connector to realize signal transmission with the charging controller, and the automatic touch switch is located on the housing side where the triangular pins are located. 6. The safety protection interface of a portable charging device according to claim 1, characterized in that: the plug-in triangular plug is also provided with an identification resistor, and the identification resistor is connected through the plugged socket connector and plug. The connector is connected to the charge controller. 7 . The safety protection interface of a portable charging device according to claim 1 , wherein the plug-in triangular plug has a charged indicator light. 8 . 8. The safety protection interface of a portable charging device according to claim 1, wherein the plug-in triangular plug has a grounding indicator light.