CN108173327B - An automatic power-off energy-saving protection device - Google Patents

Abstract

The embodiment of the present invention discloses an automatic power-off energy-saving protection device. The device includes a current detection module and a control module. During the charging process of the preset device, the current detection module outputs the power adapter from the preset device in real time. The electrical signal is detected, and the electrical signal is used to judge whether the preset device has completed the charging process. After the current detection module determines that the preset device has completed the charging process, the control module automatically disconnects the connection between the power adapter and the mains. Through this device, even if the power adapter is not unplugged after the charging process of the preset device is completed, the connection between the power adapter and the mains can be automatically disconnected, thereby avoiding the power consumption of the power adapter after the charging process is completed. It also eliminates potential safety hazards.

Description

An automatic power-off energy-saving protection device

technical field

Embodiments of the present invention relate to the technical field of charge and discharge safety, and in particular, to an automatic power-off energy-saving protection device.

Background technique

Electronic mobile devices (such as mobile phones, iPads, laptops, etc.) The utility power was removed, causing these power adapters to consume electricity all the time. For example, after a notebook computer connected to a power adapter is fully charged, its power adapter will continue to consume power and pose a safety hazard. For areas such as school dormitories, residential communities, and airports where there is a large flow of people and relatively concentrated charging equipment, the safety and energy saving of charging equipment is particularly important.

Therefore, the charging protection device needs to artificially disconnect the connection between the charging equipment and the mains after it is fully charged; this disconnection method is to protect the charging equipment one-to-one. Centralized charging areas for electric vehicles often require a large number of charging equipment, charging protection devices and their connecting lines, causing inconvenience.

In the process of realizing the embodiment of the present invention, the inventors found that after the charging of the existing charging equipment is completed, it is necessary to artificially disconnect it from the mains to ensure safety and avoid power consumption. Factors are neglected and execution is low.

Contents of the invention

The technical problem to be solved by the present invention is how to solve the problem of how to solve the problem that after the existing charging equipment is fully charged, it needs to artificially disconnect it from the mains to ensure safety and avoid power consumption. This power-off method is often ignored due to human factors. , a problem with a low degree of implementation.

In view of the above technical problems, an embodiment of the present invention provides an automatic power-off energy-saving protection device, including at least one set of charging protection structures, each set of charging protection structures includes a current detection module and a control module, and the current detection module is connected to said control module;

When charging the preset device through a power adapter of the preset device, the current detection module collects an electrical signal output from the power adapter;

The current detection module judges whether the charging process of the preset device is completed according to the electrical signal;

If the current detection module determines that the charging process of the preset device is completed, the control module cuts off the connection between the power adapter and the mains terminal.

An embodiment of the present invention provides an automatic power-off energy-saving protection device, the device includes a current detection module and a control module, in the process of charging a preset device, the current detection module real-time output from the power adapter of the preset device The electrical signal is detected, and the electrical signal is used to judge whether the preset device has completed the charging process. After the current detection module determines that the preset device has completed the charging process, the control module automatically disconnects the connection between the power adapter and the mains. Through this device, even if the power adapter is not unplugged after the charging process of the preset device is completed, the connection between the power adapter and the mains can be automatically disconnected, thereby avoiding the power consumption of the power adapter after the charging process is completed. It also eliminates potential safety hazards.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural diagram of an automatic power-off energy-saving protection device provided by an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of the functional integration of the current detection module and the control module provided by another embodiment of the present invention;

3 is a schematic diagram of the principle of detecting whether the charging process of the preset device is completed by the current detection module provided by another embodiment of the present invention;

Fig. 4 is a schematic structural diagram of a current detection module and a control module respectively integrated on two devices provided by another embodiment of the present invention;

Fig. 5 is a schematic circuit structure diagram of an automatic power-off energy-saving protection device including 4 sets of charging protection structures provided by another embodiment of the present invention;

6 is a circuit diagram of a current detection module of an automatic power-off energy-saving protection device including 4 sets of charging protection structures provided by another embodiment of the present invention;

Fig. 7 is a circuit diagram of a control module of an automatic power-off energy-saving protection device including 4 sets of charging protection structures provided by another embodiment of the present invention;

Fig. 8 is a physical structure diagram of a male-female plug adapter plate of an automatic power-off energy-saving protection device including 4 sets of charging protection structures provided by another embodiment of the present invention;

Fig. 9 is a physical structure diagram of a power-off power strip of an automatic power-off energy-saving protection device including 4 sets of charging protection structures provided by another embodiment of the present invention;

Fig. 10 is a schematic circuit structure diagram of an automatic power-off energy-saving protection device including 4 sets of charging protection structures provided by another embodiment of the present invention;

Fig. 11 is a circuit diagram of an automatic power-off energy-saving protection device including 4 sets of charging protection structures provided by another embodiment of the present invention;

Fig. 12 is a physical structure diagram of a charging panel of an automatic power-off energy-saving protection device including 4 sets of charging protection structures provided by another embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Figure 1 is a schematic diagram of the principle structure of an automatic power-off energy-saving protection device provided in this embodiment, referring to Figure 1, the device includes at least one set of charging protection structures, and each set of charging protection structures includes a current detection module 101 and a control module 102, the current detection module 101 is connected to the control module 102;

When charging the preset device through the power adapter 103 of the preset device, the current detection module 101 collects the electrical signal output from the power adapter 103 (that is, from between the battery 104 and the power adapter 103 of the preset device) electrical signal);

The current detection module 101 determines whether the charging process of the preset device is completed according to the electrical signal;

If the current detection module 101 determines that the charging process of the preset device is completed, the control module 102 cuts off the connection between the power adapter 103 and the mains terminal 105 .

It should be noted that the automatic power-off energy-saving protection device provided in this embodiment is applicable to any preset device that needs to be charged. For example, the preset device can be a mobile phone, a computer, an ipad, an electric car, etc. No specific restrictions are made. The current detection module and the control module connected during the charging process of the preset equipment are a set of charging protection structures. to the protective effect.

According to the structure of Figure 1, in practical applications, the functions of the current detection module and the control module can be integrated on one device, or the functions of the current detection module can be integrated on one device, and the corresponding functions of the control module can be integrated on the On another device, information exchange between the current detection module and the control module is performed through the communication unit, which is not specifically limited in this embodiment.

This embodiment provides an automatic power-off energy-saving protection device, which includes a current detection module and a control module. During the process of charging a preset device, the current detection module real-time monitors the power output from the power adapter of the preset device. The signal is detected, and it is judged whether the preset device has completed the charging process by detecting whether the electrical signal reaches the threshold. After the current detection module determines that the preset device has completed the charging process, the control module automatically disconnects the connection between the power adapter and the mains. Through this device, even if the power adapter is not unplugged after the charging process of the preset device is completed, the connection between the power adapter and the mains can be automatically disconnected, thereby avoiding the power consumption of the power adapter after the charging process is completed. It also eliminates potential safety hazards.

Furthermore, on the basis of the above-mentioned embodiments, FIG. 2 is a schematic structural diagram of the functional integration of the current detection module and the control module provided in this embodiment. As shown in FIG. 2 , the current detection module 101 includes a current acquisition unit (current detection line and current detection among Fig. 2 have realized the function of current acquisition unit), A/D converter and the first main control unit; Described control module comprises the second main control unit (in Fig. 2, the first main control unit A main control unit and the second main control unit are integrated into the main control unit, and the main control unit can be realized by a single-chip microcomputer, for example, the functions of the first main control unit and the second main control unit are realized by the STC89C52RC single-chip microcomputer) and a relay;

During the charging process of the preset device, the input end of the current acquisition unit is connected between the power adapter and the battery of the charging device, and the output end is connected to the A/D converter; the A/D The D converter is connected to the first main control unit;

The current acquisition unit is used to transmit the real-time detection of the electrical signal to the A/D converter, and the A/D converter converts the electrical signal into a current value of a digital signal and transmits it to the first a main control unit;

The first main control unit compares the current value with a current threshold, if the current value is less than the current threshold, the charging process of the preset device is completed, and the second main control unit The relay is controlled to disconnect the connection between the power adapter and the mains terminal (the mains jack in FIG. 2 is the interface for providing mains power).

The automatic power-off energy-saving protection device shown in Figure 2 can be set near the mains terminal, the current detection module and the control module are integrated on a charging panel, and the charging interface for connecting the power adapter and the charging interface for connecting the power adapter are provided on the charging panel. Connect the current detection interface of the current detection line. When charging the preset device, the power adapter of the preset device is connected to the charging interface, and the connecting wire drawn from the power adapter of the preset device and the battery is connected to the current detection interface corresponding to the charging interface.

The current threshold is a set value. Figure 3 provides a schematic diagram of the principle of the current detection module detecting whether the charging process of the preset device is completed in this embodiment. Referring to Figure 3, the collected current is compared with the current to determine the charging process of the preset device. Whether the charging process is completed, after judging that the charging process is completed, the connection between the mains jack and the power adapter is disconnected by controlling the relay.

This embodiment provides an automatic power-off energy-saving protection device, which integrates a current detection module and a control module, and controls the connection between the power adapter and the mains through a relay. side, so that the power adapter of the preset device only needs to add a connection line connected to the current detection interface, which is convenient for carrying the power adapter of the preset device.

Furthermore, on the basis of the above-mentioned embodiments, Fig. 4 is a schematic diagram of the principle structure of integrating the current detection module and the control module on two devices provided by this embodiment, see Fig. 4 , the current detection module is also Including a first communication unit, the control module also includes a second communication unit;

The first main control unit is connected to the first communication unit, and the second communication unit is connected to the second main control unit;

The first main control unit judges that the charging process of the preset device is completed, and sends a first prompt message that the charging process of the preset device is completed to the second communication unit through the first communication unit;

After receiving the first prompt information, the second communication unit sends the first prompt information to the second main control unit, and the second main control unit controls the relay to disconnect The connection between the power adapter and the mains terminal.

In this embodiment, the current detection module is integrated on one device (for example, integrated on the male-female plug adapter board), and the control module is integrated on another device (for example, integrated in the power supply strip), and the When charging the device, the power adapter can be plugged into the power strip, the other end of the power adapter is connected to the integrated male-female plug adapter board, and the connecting wire drawn from the male-female plug adapter board is connected to the preset device superior.

This embodiment provides an automatic power-off energy-saving protection device. The device integrates the current detection module and the control module on two devices respectively. When charging the preset device, only the plug of the power adapter needs to be inserted into the power supply strip. Connect the other end to the corresponding jack on the male-female plug adapter board, and connect the cable drawn from the male-female plug adapter board to the preset device. Compared with the preset device, at most only a power adapter and The connection line connected with the male-female plug adapter plate is enough. The charging line has a simple structure, is easy to carry, and can conveniently protect the charging process.

Furthermore, on the basis of the above-mentioned embodiments, the current detection module is arranged on the male-female joint adapter board, and the control module is arranged on the charging strip;

At least one set of detection terminals is provided on the male-female joint adapter plate, and each set of detection terminals includes a first terminal connected to the power adapter and a second terminal connected to the preset device, ;

The current acquisition unit detects the electrical signal from between the first terminal and the second terminal of each group;

The charging bar is provided with at least one third terminal connected to the power adapter, and the other end of the third terminal is connected to the mains terminal through a relay;

The second main control unit controls the commercial power output from the third terminal through the relay.

Specifically, Fig. 5 shows a schematic diagram of the circuit structure of the automatic power-off energy-saving protection device including 4 sets of charging protection structures provided by this embodiment, corresponding to the schematic diagram of Fig. 4, see Fig. 5, male and female plug adapter board It includes a current acquisition unit, an A/D converter (four groups of charging protection structures are included in Figure 5, and each group of charging protection structures corresponds to an A/D conversion channel), a first main control unit (the main control unit in Figure 5 Unit 1) and the first communication unit (the wireless transparent transmission in the male-female plug adapter board in Figure 5), and the independent 5V power supply is used to supply power for the current detection module in the male-female plug adapter board. The current detection module (i.e. collecting through the current connection line and the current acquisition unit) is connected between the storage battery (the battery to be charged in the preset device) and the charging device (ie the power adapter of the preset device). The control module is integrated in the power-off strip, including the second main control unit (main control unit 2 in Figure 5), relays (4 sets of charging protection structures, each set of charging protection structures corresponds to a relay) and the second communication unit (wireless transparent transmission in the power strip in Figure 5). The mains power supply module is a device that supplies power to circuits in the power strip through the mains.

This embodiment provides an automatic power-off energy-saving protection device. The device integrates the current detection module in the male-female plug adapter board, integrates the control module The power strip provides an interface for charging preset devices, which simplifies the charging process and facilitates operation.

Furthermore, on the basis of the above-mentioned embodiments, it also includes an interface matching module and a control switch connected to each group of detection terminals;

When the power adapter is connected to a third terminal and the first terminal of a certain group of detection terminals, the preset device is connected to the second terminal of the group of detection terminals, and the control switch connected to the group of detection terminals is turned on Afterwards, the interface matching module sends a second prompt message to start port matching to the first communication unit through the second communication unit;

After the second communication unit receives the second prompt information, the second main control unit sequentially closes the relays in the control module until receiving the third prompt information that the circuit is connected sent by the second communication unit.

Furthermore, on the basis of the above-mentioned embodiments, after the second communication unit receives the second prompt information, the second main control unit sequentially closes the relays in the control module until the second communication unit receives the second prompt information. The third prompt message of circuit connection sent by the second communication unit includes:

The interface matching module sends the pre-stored identification information of the third terminal corresponding to the group of detection terminals to the first communication unit through the second communication unit, and the second communication unit receives the second After prompting the information and the identification information, the second main control unit closes the relay of the third terminal corresponding to the identification information, and judges whether the circuit is connected. other than the third terminal, until the third prompt message is received.

Furthermore, on the basis of the above-mentioned embodiments, an indicator light connected to each group of detection terminals is also included;

After detecting that the control switch is turned on, the indicator light corresponding to the detection terminal connected to the control switch is turned on.

Figure 6 shows the circuit diagram of the current detection module control part of the automatic power-off energy-saving protection device including 4 groups of charging protection structures provided by this embodiment, and Figure 7 shows the automatic power-off protection device including 4 groups of charging protection structures provided by this embodiment. The circuit diagram of the control module of the power-off energy-saving protection device, Figure 8 shows the physical structure diagram of the male-female plug adapter board of the automatic power-off energy-saving protection device including 4 sets of charging protection structures provided by this embodiment, Figure 9 shows The physical structure diagram of the power-off strips of the automatic power-off energy-saving protection device provided in this embodiment includes 4 sets of charging protection structures.

Referring to Fig. 5, Fig. 8 and Fig. 9, the automatic power-off energy-saving protection device provided by this embodiment is mainly composed of a male-female plug adapter plate and a power-off strip. The male-female plug adapter plate includes multiple A charging device jack and a current acquisition unit, a multi-channel A/D conversion module, a main control unit 1, a wireless transparent transmission module and a power supply unit are connected in sequence. The power-off socket includes a sequentially connected wireless transparent transmission module contained in the socket, a main control unit 2, a multi-channel relay module and a power supply module obtained from the mains.

The current acquisition unit in this embodiment adopts the ACS712ELCTR-05B current sensing module, the power supply Vcc is 5V, the output range is ±5V, and the input and output have a good linear relationship within the range, and the coefficient is 185mV/A. The relation of output is Vout=2.5+0.185*Ip. When Ip=0, that is, when there is no input current, the corresponding output voltage is 2.5V. Generally, the output voltage signal is between 0.5V and 4.5V.

The A/D conversion module adopts PCF8591AD conversion module, its working voltage is 2.5V～6V, PCF8591 is a single-chip, single-power low-power 8-bit CMOS data acquisition device, with 4 analog inputs, one output and a serial I2C interface . The address, control and data of the device are transmitted through the two-wire I2C bus.

Referring to Figure 6 and Figure 7, the main control unit 1 and the main control unit 2 both adopt the minimum system of STC89C52RC single-chip microcomputer, as shown in Figure 6, the control part of the current detection module specifically includes a power supply circuit, a crystal oscillator circuit, a reset circuit, a key control circuit, Light circuit, EEPROM circuit.

The power supply circuit adopts 5V power supply, the switch is connected to a large capacitor and grounded through a decoupling capacitor, and then grounded through an LED and a current limiting resistor. The +5V and ground are respectively connected to VCC (40 pins) and GND (20 pins) of the microcontroller. As shown in Figure 6, the power supply circuit includes LED5 connected to a 5V power supply, a grounding resistor R16, capacitors C6, C7 and C8, and a switch K2.

The crystal oscillator circuit is connected to a 11.0592M crystal oscillator by pins 18 and 19 of the microcontroller, and two 20pF capacitors are added to help the crystal oscillator start and maintain the stability of the oscillation signal. The crystal oscillator circuit includes crystal oscillator Y1, capacitors C4 and C5.

The reset circuit is connected to the 9-pin RST reset pin RST of the microcontroller. The reset circuit includes a switch K1, a capacitor C2 and a resistor R5.

As shown in Figure 6, the button control circuit (that is, the circuit corresponding to the control switch connected to each group of detection terminals) is a 4-way access switch composed of a pull-up resistor connected to the button and grounded, connected to the single-chip microcomputer P2.0 ~ P2. 4 pins, the single-chip microcomputer detects whether the button is pressed. Each control switch is connected to a resistor, and the resistors R12, R13, R14 and R15 in FIG. 6 are pull-up resistors.

As shown in Figure 6, it also includes an indicator light circuit for controlling the indicator light. The indicator light circuit includes the base of the triode connected to one end of the current limiting resistor, and the other ends of the four current limiting resistors are respectively connected to the single chip microcomputer P1.0~ P1.3 pin, the collector is connected to +5V, the emitter is connected to the LED and then connected to the LED current limiting resistor and then grounded. When the microcontroller control pin gives a low level, the triode is turned on and the small light is on to indicate charging. state. Among them, as shown in Figure 6, the 4 indicator lights are LED1, LED2, LED3 and LED4 respectively, the model of the triode is 9012, and the 4 current limiting resistors are R1, R2, R3 and R4 respectively.

As shown in Figure 6, the interface matching module is realized by the EEPROM circuit. The EEPROM circuit is connected to the communication pin of the single-chip microcomputer by 24C02 and two pull-up resistors (R6 and R7) to form a line and relationship, and connected to the single-chip microcomputer P3.0 and P3. 1 pin to complete the communication with the microcontroller.

The first communication unit and the second communication unit are both DL-20 wireless serial port transparent transmission modules, which are connected to the single-chip microcomputer through the RXD and TXD interfaces to realize the communication function. DL-20 wireless serial port transparent transmission module is a full-duplex wireless transparent transmission module based on UART interface, which can work in the public frequency band of 2400MHz～2450MHz. The module adopts TI's CC2530 chip and complies with the IEEE 802.15.4 protocol. Through this module, traditional serial devices can realize wireless transmission and replace complicated wiring work.

The power supply unit in this embodiment uses a single-cell 18650 lithium battery with a 5V booster board. Nominal voltage 5V, rated capacity 3200mAh.

As shown in Figure 5 and Figure 7, the power-off socket is composed of ordinary socket and DL-20 wireless serial port transparent transmission module, main control unit 2, multi-channel solid state relay and power supply module taken from the mains, among which the solid state relay The on-off terminal controls the on-off of the fire wire of each jack on the plug strip.

The multi-channel relay module adopts 4-way low-level trigger solid-state relay module, 5V solid-state relay 240V 2A, output with resistive fuse 240V 2A, working power supply is 5V, input control signal voltage: 0-2.5V state low level, relay ON , 3.3 ~ 5V state high level, the relay OFF. The 4-way relays are connected to the microcontroller through IN0-IN3.

For example, the male-female plug adapter board and the power-off strip shown in Fig. 8 and Fig. 9 can be matched with the power adapter of the electric vehicle, and the male-female plug adapter board adopts the male-female plug of the charger commonly used in electric vehicles.

The male-female plug adapter board includes a plastic shell 804 and a first terminal 803 connected to the power adapter, wherein the first terminal 803 includes input pins 805 and 806 . The second terminal 812 connected to the battery of the electric vehicle. The second terminal 812 includes output pins 807 and 808 . An indicator light 802 and a control switch 801 corresponding to each group of detection terminals.

As shown in the partial cross-sectional view in the lower left corner of Figure 8, inside the male-female plug adapter board, the input pin 806 of the first terminal 803 is connected to the input terminal 811 of the current acquisition unit 101 in the current detection module, and the current detection module The output terminal 809 of the current collecting unit 101 is connected to the 808 pin of the second terminal 812 , and the input terminal pin 805 is connected to the 807 pin of the second terminal 812 . The single-chip microcomputer (first main control unit) reads the value of the current acquisition unit 101 through the A/D conversion module and performs data processing. The male-female plug adapter board has 4 charging channels on the board, which can detect the charging status of four charging devices in real time at the same time.

After the charging circuit is connected (that is, one end of the power adapter is connected to the socket of the power supply strip in Figure 9, the other end is connected to the first terminal 803 of the male-female circuit adapter board, and the second terminal 812 is connected to the electric vehicle. charging jack), press the charging switch (control switch) of the corresponding channel on the male-female plug adapter board, the single-chip microcomputer in the main control unit 1 detects that the corresponding button is pressed in the button control circuit, and the indicator light of the corresponding channel lights up. At the same time, as shown in Figure 5, the main control unit 1 sends a channel search command (second prompt information) to the main control unit 2 through the DL-20 wireless serial port transparent transmission module, that is, sequentially closes the relays in the power-off socket, Find an outlet that will allow the charging device to work. After closing the relay each time, after a period of delay, if the current acquisition unit 101 in the current detection module detects that there is current in the charging circuit, it will give an analog voltage value, and the analog value will be converted into After the digital quantity is sent to the single chip microcomputer 1. At this time, it also shows that the closed relay channel of the main control unit 2 at this time is correct, and the main control unit 1 sends a signal (the third prompt message) that the channel is working normally to the main control unit 2, and the main control unit 2 will stop checking other channels, and keep the channel relay closed.

At the same time, the main control unit 2 sends the relay serial number corresponding to the channel to the main control unit 1, and the main control unit 1 compares the plug channel on the male-female plug adapter board with the relay serial number (that is, the jack serial number) in the power-off strip. ) correspondingly, and stored in the EEPROM through the EEPROM circuit. When charging next time, after pressing the charging switch on the male-female plug adapter board, the main control unit 1 will first detect the relay control jack that has been paired with this channel. If the charging device fails to work normally, it means that the power-off plug If the jack on the row is changed, the pairing information stored last time will be cleared, re-detected, re-paired, and the channel information after successful pairing will be saved again.

As shown in Figure 9, the power-off strip includes a shell 901, jacks 902 and 911 (the jacks 902 and 911 are designed to adapt to different plugs, such as three-hole plugs or two-hole plugs), and an indicator light 903 and main control unit 2. Taking the jack 911 as an example, the internal structure of the power-off strip is described below. Inside the power-off strip, the outgoing line of the live wire 905 is connected to the access terminal 907 of the multi-way relay 906, and the output terminal 908 of the multi-way relay 906 is connected to the two The pins 909 of the jacks 911 are connected, and the pins 910 of the two jacks 911 are connected with the neutral line 904 . When the main control unit 2 receives the charging completion signal, it disconnects the charging device from the mains.

After the charging is completed, after the main control unit 1 detects that the charging current reaches the current threshold when fully charged, it sends a charging completion signal to the main control unit 2. After receiving the signal, the main control unit 2 disconnects the relay of the path, which is The charging equipment is disconnected from the mains, and the other channels keep the original state and do not operate.

In general, referring to Fig. 4, the implementation process of the scheme of this embodiment is: power-on initialization, when pressing the corresponding channel button on the male-female plug adapter board, the main control unit 1 passes through the DL-20 wireless serial port transparent transmission module A command to close the relay is issued to the main control unit 2, the charging device is connected, and the battery starts to charge, and at the same time, the charging indicator light of the channel is on. When the charging equipment is charging at a constant voltage, the charging current of the battery decreases gradually, and the charging is considered to be completed when it decreases to a certain value. The current detection module embedded in the male-female plug adapter board detects the current value in the channel in real time, and the digital value is obtained through AD conversion and sent to the main control unit 1. The main control unit 1 compares the detected current value with the threshold value The currents are compared, and when the threshold current is reached, a command to disconnect the relay is sent to the main control unit 2 through the wireless transparent transmission module, the indicator light goes out, and the charging ends. The device can effectively prevent the battery from overcharging, save electric energy, prolong the service life of the charging equipment, and improve the safety of electricity use.

This embodiment mainly proposes a multi-channel automatic power-off energy-saving protection device for centralized charging of electric vehicles in a residential area. Considering the convenience and practicability of plugging and unplugging charging equipment when charging electric vehicles, the scheme shown in Figure 4 is adopted to integrate the current detection module and the control module on two devices. The male-female plug adapter board (see Figure 8) gathers 4 sets of male-female plugs of the electric vehicle charger, and each set corresponds to a charging detection channel. Each group of channels on the male-female plug adapter board is equipped with a charging switch and a charging status indicator. When connecting, connect the female head on the electric vehicle charger with the male head of a channel on the adapter board, and then connect the male head of the electric vehicle charging extension cable with the female head of the channel on the adapter board. The electric vehicle charging extension cable The female head of the electric vehicle is connected to the male head of the charging port of the electric vehicle.

Furthermore, on the basis of the above-mentioned embodiments, the device provided in this embodiment is integrated on one device, and the current detection module and the control module are both arranged on the charging panel;

The charging panel is provided with at least one charging interface and at least one set of current detection interfaces; each charging interface is connected to the control module, and each set of current detection interfaces is connected to the current detection module.

Furthermore, on the basis of the above-mentioned embodiments, it also includes an indicator light and a control switch corresponding to each current detection interface;

Connect one end of the power adapter to the charging interface on the charging panel, connect the other end to the first detection interface of the current detection interface, and connect the connecting wire drawn from the second detection interface of the current detection interface to the After presetting the device, turn on the control switch corresponding to the current detection interface, and the indicator light corresponding to the current detection interface will light up;

After the control switch is turned on, the second main control unit controls the power adapter of the preset device to connect to the mains through a relay to charge the preset device.

Specifically, Fig. 10 shows a schematic diagram of the circuit structure of an automatic power-off energy-saving protection device including 4 sets of charging protection structures provided in this embodiment, corresponding to the schematic diagram of Fig. 2, see Fig. 10, including a current acquisition unit (ie 10 is connected between the charging device and the storage battery for current collection function module), A/D converter (4 sets of charging protection structures are included in Figure 10, and each set of charging protection structures corresponds to an A/D conversion channel) , main control unit (the main control unit in Fig. 10 realizes the effect of the first main control unit and the second main control unit, which can be realized by a single-chip microcomputer) and relay (4 groups of charging protection structures, each group of charging protection structures corresponds to a relay). The current collection (that is, collection through the current connection line and current detection) is connected between the storage battery (the battery that needs to be charged in the preset device) and the charging device (that is, the power adapter of the preset device). The mains power supply module is a device that supplies power to circuits in the power strip through the mains.

Figure 11 shows the circuit diagram of the automatic power-off energy-saving protection device including 4 sets of charging protection structures provided by this embodiment, and Figure 12 shows the circuit diagram of the automatic power-off energy-saving protection device including 4 sets of charging protection structures provided by this embodiment The physical structure diagram of the charging panel. The circuit shown in Figure 11 is integrated in the charging panel shown in Figure 12, similar to the circuit principles shown in Figure 6 and Figure 7, and the current detection and relay control are completed by the single-chip microcomputer STC89C52RC. Since the current detection and the control of the relay are all completed in the single chip microcomputer, it does not need to communicate information, so there is no need to connect a communication unit. The functions of the power supply circuit, crystal oscillator circuit, reset circuit, button control circuit, indicator light circuit, and EEPROM circuit shown in FIG. 11 are the same as those in FIG. 6 above, and will not be repeated here.

The charging panel shown in FIG. 12 is a multi-channel automatic power-off energy-saving protection device mainly proposed for charging equipment of mobile phones and notebook computers. Because the male and female plugs of these charging devices are small in size, the centralized and miniaturized solution shown in Figure 10 is adopted to combine the male and female plug adapter boards with the power-off socket to form an automatic power-off smart socket (charging Panel), and replace the DL-20 wireless serial port transparent transmission module in Figure 6 and Figure 7 with actual signal lines, and replace the two main control units with one main control unit (see Figure 11 for its circuit diagram) to realize Current detection, jack pairing, automatic power off functions.

The automatic power-off intelligent power strip combines the male and female plug adapter boards with the power strip to obtain a charging panel, as shown in Figure 12. The charging panel corresponds to a charging energy-saving protection device for charging a mobile phone, including a charging interface 121 (i.e. Jack for providing commercial power), a current detection interface composed of the first detection interface 122 and the second detection interface 124 . When charging the mobile phone, it needs to be realized through the power adapter and 2 charging cables. Specifically, when charging the mobile phone, plug the power adapter into the charging interface 121, connect the USB interface of a charging line to the power adapter, connect the other end to the first detection interface 122 on the panel, and connect the other end to the charging interface 122. The USB interface of the cable is connected to the second detection interface 124, and the other end is connected to the charging interface of the mobile phone to charge the mobile phone.

In the same way, when charging the computer, it also needs to be realized through a power adapter and 2 charging cables. Specifically, when charging a computer, one end of the power adapter is plugged into the charging interface corresponding to the power adapter of the computer (that is, the three-pin jack on the charging panel), and the other end is connected to the first detection interface 126 on the panel. Connect one end of another charging cable to the second detection interface 127, and connect the other end to the charging interface of the computer to charge the computer. You can refer to the above method when charging other devices such as ipad, so I won’t go into details here. The circuit structure between the charging interface and each group of current detection interfaces in this embodiment is the same as the circuit structure between the third terminal and each group of detection terminals in the above embodiment. The first detection terminal in this embodiment The circuit structure between the interface and the second detection interface is the same as the circuit structure between the first terminal and the second terminal in the above embodiment. This embodiment combines the power strip and the automatic power-off energy-saving protection device together, realizing the miniaturization and portability of the equipment. On the other hand, this method only needs to provide another charging line to complete the charging process, and does not need to redesign the original charging line, which is simple and feasible.

The automatic power-off energy-saving protection device provided in this embodiment includes a current detection unit and a power-on/off execution unit. The current detection unit detects the current of the output line of the power adapter, and judges whether the battery is fully charged according to the comparison between the above current and the threshold current. The multi-channel automatic power-off energy-saving protection device includes a male-female plug adapter board and a power supply socket. The above-mentioned male-female plug adapter board and the power supply socket are connected through a wireless communication module to gather multiple charging channels together to achieve multi-channel concentration. Management; the male and female plug adapter board includes the battery charging current detection jack concentrated on the panel and the current acquisition unit, A/D conversion module, main control unit 1, power supply and communication module 1 and DC power supply unit connected in sequence . The battery charging current detection jack, the current detection module and the A/D conversion module are multiplexed.

The power supply strip includes a communication module 2 with a male-female plug adapter board included in the strip, a main control unit 2, a multi-channel relay, and a power supply module taken from the mains. According to the current change in the power adapter and battery charging circuit, the on-off of the power adapter and the power supply strip is controlled. The power supply strip is used to disconnect the charging equipment from the mains. Compared with the prior art, the present invention can be used in conjunction with various types of power adapters on the market, can detect the status of multiple charging devices at the same time, and automatically disconnect the mains power of the charging devices after the rechargeable battery is fully charged, eliminating the need for charging. Power loss when the device is in standby, prevent overcharging, safety and energy saving, prolong the service life of charging equipment and rechargeable batteries; at the same time, the use of wireless modules reduces the messy wire connection of the device and increases portability.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, not to limit them; although the embodiments of the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art The skilled person should understand that: it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the present invention The scope of the technical solution of each embodiment of the embodiment.

Claims (6)

1. An automatic power-off energy-saving protection device, characterized in that it includes at least one set of charging protection structures, each set of charging protection structures includes a current detection module and a control module, and the current detection module is connected to the control module; When charging the preset device through a power adapter of the preset device, the current detection module collects an electrical signal output from the power adapter; The current detection module judges whether the charging process of the preset device is completed according to the electrical signal; If the current detection module judges that the charging process of the preset device is completed, the control module cuts off the connection between the power adapter and the mains terminal; The current detection module includes a current acquisition unit, an A/D converter and a first main control unit; the control module includes a second main control unit and a relay; During the charging process of the preset device, one end of the current acquisition unit is connected between the power adapter and the battery of the preset device, and the other end is connected to the A/D converter; the A/D The D converter is connected to the first main control unit; The current acquisition unit is used to transmit the electrical signal collected in real time to the A/D converter, and the A/D converter converts the electrical signal into a current value of a digital signal and transmits it to the the first main control unit; The first main control unit compares the current value with a current threshold, if the current value is less than the current threshold, the charging process of the preset device is completed, and the second main control unit A relay is controlled to disconnect the connection between the power adapter and the mains terminal; The current detection module also includes a first communication unit, and the control module also includes a second communication unit; The first main control unit is connected to the first communication unit, and the second communication unit is connected to the second main control unit; The first main control unit judges that the charging process of the preset device is completed, and sends a first prompt message that the charging process of the preset device is completed to the second communication unit through the first communication unit; After receiving the first prompt information, the second communication unit sends the first prompt information to the second main control unit, and the second main control unit controls the relay to disconnect The connection between the power adapter and the mains terminal; The current detection module is arranged on the male-female joint adapter board, and the control module is arranged on the charging strip; At least one set of detection terminals is provided on the male-female connector adapter plate, and each set of detection terminals includes a first terminal connected to the power adapter and a second terminal connected to the preset device; The current acquisition unit detects the electrical signal from between the first terminal and the second terminal of each group; The charging bar is provided with at least one third terminal connected to the power adapter, and the other end of the third terminal is connected to the mains terminal through a relay; The second main control unit controls the commercial power output from the third terminal through the relay. 2. The device according to claim 1, further comprising an interface matching module and a control switch connected to each group of detection terminals; When the power adapter is connected to a third terminal and the first terminal of a certain group of detection terminals, the preset device is connected to the second terminal of the group of detection terminals, and the control switch connected to the group of detection terminals is turned on Afterwards, the interface matching module sends a second prompt message to start port matching to the first communication unit through the second communication unit; After the second communication unit receives the second prompt information, the second main control unit sequentially closes the relays in the control module until receiving the third prompt information that the circuit is connected sent by the second communication unit. 3. The device according to claim 2, characterized in that, after the second communication unit receives the second prompt information, the second main control unit closes the relays in the control module sequentially until receiving the second prompt information. The third prompt message of circuit connection sent by the second communication unit includes: The interface matching module sends the pre-stored identification information of the third terminal corresponding to the group of detection terminals to the first communication unit through the second communication unit, and the second communication unit receives the second After prompting the information and the identification information, the second main control unit closes the relay of the third terminal corresponding to the identification information, and judges whether the circuit is connected. other than the third terminal, until the third prompt message is received. 4. The device according to claim 2, further comprising an indicator light connected to each group of detection terminals; After detecting that the control switch is turned on, the indicator light corresponding to the detection terminal connected to the control switch is turned on. 5. The device according to claim 1, wherein the current detection module and the control module are both arranged on the charging panel; The charging panel is provided with at least one charging interface and at least one current detection interface; the charging interface is connected to the control module, and the current detection interface is connected to the current detection module. 6. The device according to claim 5, further comprising an indicator light and a control switch corresponding to each current detection interface; Connect one end of the power adapter to the charging interface on the charging panel, connect the other end to the first detection interface of the current detection interface, and connect the connecting wire drawn from the second detection interface of the current detection interface to the After presetting the device, turn on the control switch corresponding to the current detection interface, and the indicator light corresponding to the current detection interface will light up; After the control switch is turned on, the second main control unit controls the preset device to be connected to the mains through a relay to charge the preset device.