CN210894533U

CN210894533U - Charging socket capable of automatically distinguishing compliance charger

Info

Publication number: CN210894533U
Application number: CN201921392789.4U
Authority: CN
Inventors: 舒鹏; 周玉龙
Original assignee: Jiangsu Jiaer Intelligent Technology Co ltd
Current assignee: Jiangsu Jiaer Intelligent Technology Co ltd
Priority date: 2019-08-26
Filing date: 2019-08-26
Publication date: 2020-06-30
Anticipated expiration: 2029-08-26

Abstract

The utility model discloses a can distinguish the socket that charges of compliant charger automatically, include: a single chip microcomputer; the power supply loop is formed by sequentially connecting a socket power supply, a common mode inductor and a socket; the relay is connected in the power supply loop and receives the control signal of the singlechip to control the on/off of the power supply loop; the sampling resistor is connected between the N end of the socket power supply and the common-mode inductor; the input end of the absolute value circuit is connected between the sampling resistor and the common-mode inductor; the amplifying circuit is connected between the output end of the absolute value circuit and the AD input end of the singlechip; and the load detection circuit is connected in the power supply loop and feeds back a signal to the singlechip when equipment is connected to the socket. The utility model discloses a method analysis is carried out to the waveform at sampling resistance both ends to the singlechip to judge whether the load type is charger equipment, and then forbid non-charger equipment to use on the socket, effectively solved the problem that charging equipment was taken by non-charging equipment.

Description

Charging socket capable of automatically distinguishing compliance charger

Technical Field

The utility model relates to a can distinguish the socket that charges of compliant charger automatically.

Background

In order to conveniently adopt the electric motor car as the life trip of people of vehicle, set up more and more electric motor car battery charging outfit in the city, though made things convenient for people to charge the electric motor car, but also brought a problem simultaneously: many people can insert the non-charger equipment into the charging socket of the electric vehicle to use electricity, so that the public resource is illegally occupied, and certain potential safety hazards can exist when the rated voltage of the non-charger equipment is not matched with the output voltage of the charging equipment. Therefore, the applicant considered to design a charging receptacle capable of prohibiting a non-charger device from using the charging receptacle capable of automatically discriminating a compliant charger.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can distinguish the socket that charges of compliant charger automatically, prevent that non-charger equipment from using on the socket that charges.

Realize the utility model discloses the technical scheme of purpose is: a charging receptacle capable of automatically resolving a compliant charger, comprising: a single chip microcomputer; the power supply loop is formed by sequentially connecting a socket power supply, a common mode inductor and a socket; the relay is connected in the power supply loop and receives the control signal of the singlechip to control the on/off of the power supply loop; the sampling resistor is connected between the N end of the socket power supply and the common-mode inductor; the input end of the absolute value circuit is connected between the sampling resistor and the common-mode inductor; the amplifying circuit is connected between the output end of the absolute value circuit and the AD input end of the singlechip; and the load detection circuit is connected in the power supply loop and feeds back a signal to the singlechip when equipment is connected to the socket.

The coil terminal of the relay is electrically connected with the control signal output end of the singlechip; two contact terminals of the relay are respectively and electrically connected with the L end of a socket power supply and one input end of the common-mode inductor.

The input end of the load detection circuit is connected with the two contact terminals of the relay in parallel, and the output end of the load detection circuit is electrically connected with the instruction input end of the single chip microcomputer.

The model of the single chip microcomputer is stc8a8k32s4a 12.

The relay adopts a NT73-2 type relay.

The load detection circuit adopts an optical coupling circuit.

The model of the optocoupler is LTV 814.

By adopting the technical scheme, the utility model discloses following beneficial effect has: (1) the utility model discloses a method analysis is carried out to the waveform at sampling resistance both ends to the singlechip to judge whether the load type is charger equipment, and then forbid non-charger equipment to use on the socket, effectively solved the problem that charging equipment was taken by non-charging equipment.

(2) The utility model discloses an input of load detection circuitry is parallelly connected with two contact terminals of relay to the output end of load detection circuitry is connected with the instruction input electricity of singlechip, and when two contact terminals of relay were closed, the short circuit of load detection circuitry, stop work need not to detect always.

(3) The utility model discloses a load detection circuitry adopts the opto-coupler circuit, and reaction rate is fast.

Drawings

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a circuit diagram of the present invention.

The reference numbers in the drawings are:

the device comprises a single chip microcomputer 1, a socket power supply 2, a common mode inductor 3, a socket 4, a relay 5, a sampling resistor 6, an absolute value circuit 7, an amplifying circuit 8 and a load detection circuit 9.

Detailed Description

(example 1)

Referring to fig. 1, the charging socket capable of automatically distinguishing the compliance charger of the present embodiment includes a single chip 1, a socket power supply 2, a common mode inductor 3, a socket 4, a relay 5, a sampling resistor 6, an absolute value circuit 7, an amplifying circuit 8, and a load detection circuit 9.

The model of the singlechip 1 is stc8a8k32s4a 12. And a coil terminal of the relay 5 is electrically connected with a control signal output end of the singlechip 1. Two contact terminals of the relay 5 are electrically connected to the L terminal of the outlet power supply 2 and one input terminal of the common mode inductor 3, respectively. Two ends of the sampling resistor 6 are respectively and electrically connected with the N end of the socket power supply 2 and the other input end of the common mode inductor 3. The output terminal of the common mode inductor 3 is electrically connected to the socket 4. The absolute value circuit 7 is connected between the sampling resistor 6 and the other input end of the common-mode inductor 3, the output end of the absolute value circuit 7 is electrically connected with the input end of the amplifying circuit 8, and the output end of the amplifying circuit 8 is electrically connected with the AD input end of the single chip microcomputer 1. The input end of the load detection circuit 9 is connected in parallel with the two contact terminals of the relay 5, and the output end of the load detection circuit 9 is electrically connected with the instruction input end of the single chip microcomputer 1.

Referring to fig. 2, the relay 5 is a NT73-2 type relay. The load detection circuit 9 adopts an optical coupler circuit, wherein the model of the optical coupler is LTV 814. The working principle of the charging socket capable of automatically distinguishing the compliant charger of the embodiment is as follows: when a load is connected to an SC1(L) or an SC2(N) (socket 4), a load detection circuit 9 feeds back a load connection signal (FZJC in fig. 2) to a single chip microcomputer 1, a control signal output terminal (JDQKZ in fig. 2) of the single chip microcomputer 1 outputs a high level, a transistor N1 turns on a contact of a relay 5 to pull in, an L end of a 220V alternating current (socket power supply 2) is turned on, a power supply loop supplies power to the load, the load enters a charging state, a voltage drop is generated when a current flows through R9 (sampling resistor 6) during charging, the voltage drop changes with the magnitude of an external charging current, the voltage drop is converted into a positive voltage change through an absolute value circuit 7 formed by ICs 4A, R31, C16, R16, R32 and D5, and then the positive voltage change is amplified through an amplifying circuit 8 formed by ICs 4b, R21, R30, R5, C22, R20 and DW1 to amplify a negative voltage drop signal input port of an AD (DLJC in fig. 2) of, the single chip microcomputer 1 analyzes and judges the waveform of the AD data: if the load is analyzed to be a charger by the singlechip 1, continuing charging; if the single chip microcomputer 1 analyzes that the load is not a charger, the control signal output end of the single chip microcomputer 1 outputs low level, the triode N1 is closed, the contact of the relay 5 is disconnected, and charging is stopped.

In this embodiment, the basis of whether the chip microcomputer 1 analyzes and determines whether the load is a charger is as follows: during charging, the two ends of the sampling resistor 6 can generate waveform changes, and whether the load is a charger device can be judged by performing data amplification analysis on the waveforms.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A charging jack capable of automatically resolving compliant chargers comprising:

a single chip microcomputer (1);

the power supply loop is formed by sequentially connecting a socket power supply (2), a common mode inductor (3) and a socket (4);

the relay (5) is connected in the power supply loop and receives a control signal of the singlechip (1) to control the power supply loop to be switched on/off;

the sampling resistor (6) is connected between the N end of the socket power supply (2) and the common-mode inductor (3);

an absolute value circuit (7) having an input terminal connected between the sampling resistor (6) and the common mode inductor (3);

the amplifying circuit (8) is connected between the output end of the absolute value circuit (7) and the AD input end of the singlechip (1);

and the load detection circuit (9) is connected in the power supply loop, and feeds back a signal to the singlechip (1) when equipment is accessed to the socket (4).

2. A charging jack capable of automatically resolving compliant chargers as recited in claim 1, wherein: a coil terminal of the relay (5) is electrically connected with a control signal output end of the singlechip (1); two contact terminals of the relay (5) are respectively and electrically connected with the L end of the socket power supply (2) and one input end of the common-mode inductor (3).

3. A charging jack capable of automatically resolving compliant chargers as recited in claim 2, wherein: the input end of the load detection circuit (9) is connected with the two contact terminals of the relay (5) in parallel, and the output end of the load detection circuit (9) is electrically connected with the instruction input end of the singlechip (1).

4. A charging jack capable of automatically resolving compliant chargers as recited in claim 1, wherein: the relay (5) adopts an NT73-2 type relay.

5. A charging jack capable of automatically resolving compliant chargers as recited in claim 1, wherein: the load detection circuit (9) adopts an optical coupling circuit.

6. A charging jack capable of automatically resolving compliant chargers as recited in claim 5, wherein: the model of the optocoupler is LTV 814.