CN203674763U

CN203674763U - Charging automatic power off device of electric vehicle

Info

Publication number: CN203674763U
Application number: CN201420014343.9U
Authority: CN
Inventors: 孔雪卉; 耿欣; 井洪业; 王超; 周翔训
Original assignee: University of Jinan
Current assignee: University of Jinan
Priority date: 2014-01-10
Filing date: 2014-01-10
Publication date: 2014-06-25
Anticipated expiration: 2024-01-10

Abstract

A charging automatic power off device of an electric vehicle of the utility model comprises a control module, a power supply module, a switch module, a voltage acquisition module and a current acquisition module. The current acquisition module comprises a voltage acquisition circuit, and the voltage acquisition circuit is electrically connected with the control module. The switch module comprises an electromagnetic release and a Darlington drive circuit, and the Darlington drive circuit is connected with the control module and the electromagnetic release electrically and separately. The current acquisition module comprises a current acquisition circuit and an amplifying and filtering circuit, and the current acquisition circuit is connected with the control module and the amplifying and filtering circuit electrically and separately. The power supply module comprises a primary power supply circuit and a secondary power supply circuit, the primary power supply circuit supplies power to the secondary power supply circuit and the switch module, and the secondary power supply circuit supplies power to the control module, the voltage acquisition module and the current acquisition module. The charging automatic power off device of the electric vehicle of the utility model can prevent a battery from being overcharged, is simple in structure and low in cost, and is convenient to produce and popularize.

Description

A kind of electric motor car charging auto-power-off device

Technical field

The utility model relates to a kind of power-off protection apparatus, relates in particular to a kind of electric motor car charging auto-power-off device.

Background technology

Society energy scarcity, energy waste is serious, and utilization ratio is not high.Electric motor car is as the vehicles general in people's daily life, bring the convenience in traffic to people, but the electric motor car of selling on market now only has supporting with it charger, good charger can be realized cutout after battery is full of electricity, but the just electric current of DC side now breaking, charger, still in " standby " state, still can consume part electric energy; Quality still can charge the battery with the form of trickle slightly almost, long-time trickle charge not only can cause shorter battery life or damage, and has increased the potential safety hazard of charger self.And charger is still in running order in the situation that main power source does not disconnect, and has wasted electric energy.

Summary of the invention

For solving above-mentioned defect of the prior art, the utility model provides a kind of electric motor car charging auto-power-off device, has solved electric car charger and has filled the problem of still charging after expire at battery.

For solving the problems of the technologies described above, the utility model scheme comprises: a kind of electric motor car charging auto-power-off device, it is characterized in that, and comprise control module, power module, switch module, voltage acquisition module and current acquisition module; Described current acquisition module comprises voltage collection circuit, and described voltage collection circuit is electrically connected with control module; Described switch module comprises magnetictrip and Darlington drive circuit, and described Darlington drive circuit is electrically connected with control module and magnetictrip respectively; Described current acquisition module comprises current collection circuit and filtering and amplifying circuit, and described current collection circuit is electrically connected with control module and filtering and amplifying circuit respectively; Described power module comprises one-level power supply circuits and secondary power supply circuits, described one-level power supply circuits provide supply of electric power for secondary power supply circuits, switch module, and described secondary power supply circuits provide supply of electric power for control module, voltage acquisition module, current acquisition module.

Further, this device also comprises LCD MODULE, and described LCD MODULE is electrically connected in control module.

Further, described LCD MODULE adopts LCD1602 as LCDs.

Further, described control module adopts MSP430G2553 microprocessor as core controller.

The beneficial effects of the utility model are: electric current and voltage condition when the utility model obtains charging by current acquisition module and voltage acquisition module, and utilize magnetictrip to realize the break-make of circuit, avoid situation about being overcharged with electricity, greatly extend the useful life of charger, moreover, in power module, be provided with multistage power supply circuits, can adapt to different voltage, whole apparatus structure is simple, with low cost, is convenient to produce and promote.

Accompanying drawing explanation

Fig. 1 is theory structure block diagram of the present utility model;

Fig. 2 is catenation principle block diagram under the utility model use state;

Fig. 3 is the circuit theory diagrams of the utility model one-level power supply circuits;

Fig. 4 is the circuit theory diagrams of the utility model secondary power supply circuits;

Fig. 5 is the circuit theory diagrams of the utility model control module;

Fig. 6 is the circuit theory diagrams of the utility model voltage collection circuit;

Fig. 7 is the circuit theory diagrams of the utility model current collection circuit and filtering and amplifying circuit;

Fig. 8 is the circuit theory diagrams of the utility model Darlington drive circuit;

Fig. 9 is the utility model magnetictrip terminal connection diagram;

Figure 10 is the circuit theory diagrams of the utility model LCD MODULE.

Embodiment

Below in conjunction with accompanying drawing, concrete enforcement of the present utility model is described, should be appreciated that exemplifying embodiment described herein is only for description and interpretation the utility model, and be not used in restriction the utility model.

A kind of electric motor car charging auto-power-off device as shown in Figure 1, it comprises control module, power module, switch module, voltage acquisition module and current acquisition module; Described current acquisition module comprises voltage collection circuit, and described voltage collection circuit is electrically connected with control module; Described switch module comprises magnetictrip and Darlington drive circuit, and described Darlington drive circuit is electrically connected with control module and magnetictrip respectively; Described current acquisition module comprises current collection circuit and filtering and amplifying circuit, and described current collection circuit is electrically connected with control module and filtering and amplifying circuit respectively; Described power module comprises one-level power supply circuits and secondary power supply circuits, described one-level power supply circuits provide supply of electric power for secondary power supply circuits, switch module, and described secondary power supply circuits provide supply of electric power for control module, voltage acquisition module, current acquisition module.

Further, this device also comprises LCD MODULE, and described LCD MODULE is electrically connected in control module, and described LCD MODULE adopts LCD1602 as LCDs.

Introduce in detail by reference to the accompanying drawings the operation principle of each circuit in this device below:

As shown in Figure 3, one-level power supply circuits comprise resistance R 1, capacitor C 5, capacitor C 6, voltage stabilizing didoe D1, inductance L 1, slide rheostat R and chip LM2596HVS, are used for the charger voltage step-down of input, the 7.5V voltage of stable output.

As shown in Figure 4, secondary power supply circuits comprise capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 4 and chip LM1117, are used for 7.5V voltage to drop to 3.3V.

As shown in Figure 5, control module adopts MSP430G2553 chip as core controller, and build peripheral circuit by OR resistance R 2, OR resistance R 3, capacitor C 7, crystal oscillator Y1, capacitor C 10, capacitor C 8, capacitor C 9, capacitor C 11, resistance R 4, using 3.3V voltage as working power, control the break-make of magnetictrip.

As shown in Figure 6, voltage collection circuit comprises resistance R 9 and resistance R 11, and the voltage signal state of charger is passed to control module, and the voltage in this figure is 56V, and virtual voltage is consistent with the output voltage of charger.

As shown in Figure 7, current collection circuit and filtering and amplifying circuit comprise inductance L 2, capacitor C 12, resistance R 5, resistance R 6, resistance R 8, resistance R 7, inductance L 3, capacitor C 13, resistance R 10, resistance R 12, resistance R 14, resistance R 13 and two operational amplifiers, operational amplifier adopts LM358 chip, these two circuit are used for gathering the charging current value of storage battery (battery), and upload to control module.

As shown in Figure 8, Darlington drive circuit comprises triode Q1 and triode Q2, is used for receiving the signal of control module, thereby controls the break-make of magnetictrip.

As shown in Figure 9, the terminal of magnetictrip has 5, and wherein, terminal 1, terminal 3, terminal 4, terminal 5 are outside 4 ports of drawing of this device, and terminal 1 connects 220V voltage, and terminal 3 connects charger input, and terminal 4 connects charger output, and terminal 5 connects storage battery.

Terminal 2 is equivalent to the two ends, contact of release, the live wire of 220V is received one end of the normally-closed contact (terminal 2) of magnetictrip, the single line of another termination charger of normally-closed contact (terminal 2), the another single line of charger and the zero line of 220V join, and have so just formed a complete path being connected with charger.

As shown in figure 10, LCD MODULE adopts chip LCD1602, realizes the demonstration of the numerical value such as electric current, voltage.

In the time that reality is used, as shown in Figure 2, storage battery connects respectively filtering and amplifying circuit and magnetictrip, the input of charger is connected with 220V voltage by magnetictrip, the output of charger is received respectively magnetictrip, on one-level power supply circuits and voltage acquisition module, after connection, press charge button current flowing by user, electric motor car starts charging, because device inside is equipped with magnetictrip, even when charging accident power-off can modifier yet operating state, the charging current of current acquisition module meeting Real-time Collection battery, when arriving, charging current sets after numerical value, control module can be controlled magnetictrip and disconnect, thereby cut off the alternating current path between charger and AC power.

Should be understood that; the above-mentioned description for preferred embodiment is comparatively detailed; can not therefore think the restriction to the utility model scope of patent protection; those of ordinary skill in the art is under enlightenment of the present utility model; do not departing from the scope situation that the utility model claim protects; can also make the various deformation such as replacement, simple combination, within these all fall into protection range of the present utility model, request protection range of the present utility model should be as the criterion with claims.

Claims

1. an electric motor car charging auto-power-off device, is characterized in that, comprises control module, power module, switch module, voltage acquisition module and current acquisition module; Described current acquisition module comprises voltage collection circuit, and described voltage collection circuit is electrically connected with control module; Described switch module comprises magnetictrip and Darlington drive circuit, and described Darlington drive circuit is electrically connected with control module and magnetictrip respectively; Described current acquisition module comprises current collection circuit and filtering and amplifying circuit, and described current collection circuit is electrically connected with control module and filtering and amplifying circuit respectively; Described power module comprises one-level power supply circuits and secondary power supply circuits, described one-level power supply circuits provide supply of electric power for secondary power supply circuits, switch module, and described secondary power supply circuits provide supply of electric power for control module, voltage acquisition module, current acquisition module.

2. a kind of electric motor car charging auto-power-off device according to claim 1, is characterized in that, this device also comprises LCD MODULE, and described LCD MODULE is electrically connected in control module.

3. a kind of electric motor car charging auto-power-off device according to claim 2, is characterized in that, described LCD MODULE adopts LCD1602 as LCDs.

4. a kind of electric motor car charging auto-power-off device according to claim 1 and 2, is characterized in that, described control module adopts MSP430G2553 microprocessor as core controller.