CN201142468Y

CN201142468Y - Charging protection socket for electric car

Info

Publication number: CN201142468Y
Application number: CN 200720194098
Authority: CN
Inventors: 李志强; 傅勇山
Original assignee: Hengyang Normal University
Current assignee: Hengyang Normal University
Priority date: 2007-11-07
Filing date: 2007-11-07
Publication date: 2008-10-29
Anticipated expiration: 2017-11-07

Abstract

The utility model discloses an electric vehicle charging protection socket. One common terminal of a start button and an AC power supply unit in parallel connection is connected with a power supply plug via a wire, the other common terminal is connected with a control circuit unit and a blanket socket at the same time, and the control circuit unit is used for controlling disconnection and connection of the AC power supply unit according to the signal of the electric current passing through the socket detected by a charging current detection unit. The charging protection socket provided by the utility model has the advantages of simple and compact structure, low cost, simple operation, and good safety; and can automatically cut off the charger power supply after the electric vehicle is fully charged.

Description

Electric motor car charge protection socket

Technical field

The utility model is mainly concerned with the combined socket and switch field in the daily electrical equipment, refers in particular to a kind of electric motor car charge protection socket.

Background technology

The electric motor car user is more and more at present, yet most of users are considerably less to the cognition of electric motor car storage battery, storage battery is as one of four big parts of electric motor car, the taboo of its use is very many, wherein have 2 particularly important: the one, the storage battery charging interval is long, the useful life that is easy to cause the pole plate distortion and influences the storage battery group, the 2nd, normal storage battery is full of " floating charge " time that also needs behind the electricity about two hours, if there is not the charging process in this stage, also can cause to a certain degree damage, can storage battery be scrapped when serious to storage battery.At above-mentioned situation, a kind of electric motor car charge protection of ad hoc meter socket, it has really solved long storage battery of electric motor car charging interval and has held the trouble of can't stand and getting up to pull out electricity midnight every night, and has prolonged the useful life of electric motor car storage battery effectively.

The utility model content

Problem to be solved in the utility model just is: at the technical problem of prior art existence; the utility model provide a kind of simple and compact for structure, with low cost, easy and simple to handle, fail safe is good, and can be full of the electric motor car charge protection socket that electricity back cuts off the charger power supply automatically in electric motor car.

For solving the problems of the technologies described above, the solution that the utility model proposes is: a kind of electric motor car charge protection socket, and it comprises attaching plug, lead, start button, Alternating Current Power Supply unit, control circuit unit, jack housing, charging current detecting unit, blanket socket; It is characterized in that: a common port after described start button, the parallel connection of Alternating Current Power Supply unit links to each other with attaching plug by lead, another common port connects control circuit unit, blanket socket simultaneously, and control circuit unit detects disconnection or the closure that the signal that flows through the blanket socket size of current is controlled the Alternating Current Power Supply unit according to the charging current detecting unit.

The control chip of described control circuit unit adopts 555 time-base circuits, and transformerless low-voltage dc power supply is by resistance R 1, R5, and capacitor C 1, C4, C5 and diode D4, D5, D6 constitute.

Compared with prior art, advantage of the present utility model just is:

1, electric motor car charge protection socket of the present utility model, simple and compact for structure, with low cost, easy and simple to handle, fail safe is good;

2, electric motor car charge protection socket of the present utility model, cutting off the electricity supply automatically after electric motor car is full of electricity, and just last " floating charge " finishes prevents to overcharge, and has prolonged the useful life of storage battery effectively.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is the circuit theory schematic diagram of specific embodiment in the utility model.

Marginal data

1, attaching plug 2, lead

3, start button 4, Alternating Current Power Supply unit

5, control circuit unit 6, jack housing

7, charging current detecting unit 8, blanket socket

Embodiment

Below with reference to the drawings and specific embodiments the utility model is described in further details.

As depicted in figs. 1 and 2; electric motor car charge protection socket of the present utility model; it comprises attaching plug 1; lead 2; start button 3; Alternating Current Power Supply unit 4; control circuit unit 5; jack housing 6; charging current detecting unit 7; blanket socket 8; it is characterized in that: described start button 3; a common port after 4 parallel connections of Alternating Current Power Supply unit links to each other with attaching plug 1 by lead 2; another common port connects control circuit unit 5 simultaneously; blanket socket 8, control circuit unit 5 detects disconnection or the closure that the signal that flows through blanket socket 8 size of current is controlled Alternating Current Power Supply unit 4 according to charging current detecting unit 7.

As shown in Figure 2, in specific embodiment, relay K 1 in the Alternating Current Power Supply unit 4, start button 3 (S1) common port in parallel passes through the live wire L and the blanket socket 8 (J2) of lead 2, control circuit unit 5 links to each other, another common port links to each other with attaching plug 1 by the live wire L of lead 2, control circuit unit 5 comprises 555 time-base circuit U1, and resistance R 1, R5, capacitor C 1, C4, C5 and diode D4, D5, the 12V low-voltage dc power supply that D6 constitutes, charging current detecting unit 7 is by resistance R 2, R3, R4, R6, diode D3, capacitor C 2, C3 and triode Q1 constitute, Alternating Current Power Supply unit 4 is made of relay K 1 and diode D1, blanket socket 8 is J2, in the present embodiment, the live wire L of lead 2 is by the resistance R 1 of start button 3 (S1) with control circuit unit 5, a common port of capacitor C 1 parallel connection links to each other, R1, another common port and the D5 of C1, D6 links to each other, the negative electrode of D5 is through R5 and D4 in parallel, C4,4 of C5 and control chip 555 time-base circuit U1,8 pin link to each other, D4, C4, the other end of C5 links to each other with the anode of D6 again, 4 of resistance R 2 one ends and U1,8 pin link to each other, the other end of R2 and capacitor C 2, the anode of the diode D2 of charging current detecting

unit

7,2 of U1,6 pin link to each other, the other end of R6 and diode D2 negative electrode, the collector electrode of triode Q1 links to each other, the 3 pin Q of U1 and the relay K 1 of Alternating Current Power Supply unit 4, diode D1 links to each other.

Operation principle: press start button 3 (S1), 220 volts of AC power are passed through S1, through R1, the C1 step-down, D5, the D6 rectification, the R5 current limliting, C4, C5 filtering, 12 volts of low-voltage dc power supplies of output after the D4 voltage stabilizing, this moment control circuit unit 5 in

U1

2,6 pin voltages are lower than 8 volts, the 3 pin Q output high level of U1, relay K 1 closure in the Alternating Current Power Supply unit 4, the R4 of charging current detecting unit 7 goes up the pressure drop of generation through the D3 rectification, link to each other with the base stage of triode Q1 by R3 again after the C3 filtering, triode Q1 conducting, the current collection of triode is low level very, promptly in the control circuit unit 52 of U1,6 pin voltages are lower than 8 volts, so the 3 pin Q of U1 output high level, the relay K 1 of Alternating Current Power Supply unit 4 continues the original closure state of maintenance, and blanket socket 8 (J2) gets electric, and charger enters and charges normal operating state; After the charger indicator light becomes green light by red light; charger enters " floating charge " stage; charging current detecting unit 7 detects the electric current that flows through blanket socket J2 by R4 and reduces; triode Q1 ends; the current collection of triode Q1 is high level very; because the effect that oppositely ends of diode D2; 2 of U1; 6 pin voltages can not suddenly change; C2 is through about 2 hours charging; its voltage makes 2 of U1; 6 pin voltages reach 8 volts, the 3 pin Q output low levels of U1, and the relay K 1 of Alternating Current Power Supply unit 4 disconnects; thereby cut off the AC power of blanket socket J2, realize the electric motor car charge protection.

Claims

1; a kind of electric motor car charge protection socket; comprise attaching plug (1); lead (2); start button (3); Alternating Current Power Supply unit (4); control circuit unit (5); jack housing (6); charging current detecting unit (7); blanket socket (8); it is characterized in that: described start button (3); a common port after Alternating Current Power Supply unit (4) parallel connection links to each other with attaching plug (1) by lead (2); another common port connects control circuit unit (5) simultaneously; blanket socket (8), control circuit unit (5) detects disconnection or the closure that the signal that flows through blanket socket (8) size of current is controlled Alternating Current Power Supply unit (4) according to charging current detecting unit (7).

2, electric motor car charge protection socket according to claim 1, it is characterized in that: the control chip of described control circuit unit (5) adopts 555 time-base circuits.