KR20170099006A - Portable Check safety device for electric vehicle - Google Patents

Abstract

The present invention relates to an easy-to-carry portable electric vehicle safety inspecting device for detecting an electric leakage of an electric vehicle regardless of location. The purpose of the present invention is to provide the portable electric vehicle safety inspecting device capable of easily and safely detecting electric leakage which is an inspection item to inspect for a malfunction of the electric vehicle. The portable electric vehicle safety inspecting device according to the present invention includes: a power supply unit connected to an inlet supplying power for charging a battery of the electric vehicle, supplying power to the inlet, and having a relay allowing or cutting off the power supply; a measuring unit measuring the insulation resistance of the battery of the electric vehicle when power is supplied to the battery from the power supply unit; a control unit generating informing signals in case the insulation resistance measured by the measuring unit is higher than preset insulation resistance; and a display unit displaying the informing signals generated by the control unit.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electric vehicle safety inspection apparatus, and more particularly, to a safety inspection apparatus for a portable electric vehicle capable of detecting whether or not an electric vehicle is short-circuited,

Electric vehicles have been produced before gasoline or diesel vehicles, but they have not been put to practical use because of the heavy weight of the battery and the time it takes to charge. Recently, fossil energy has been exhausted and environmental pollution has led to the use of electric energy As interest in electric vehicles has increased, researches on them have been actively pursued.

An electric vehicle (EV) is an automobile that uses an electric battery and an electric motor, that is, electric power, instead of using petroleum fuel and an engine. Such an electric vehicle drives an automobile by rotating an electric furnace motor charged in the battery, and thus a charging device for charging the battery is required.

Leakage is a common problem in using electricity, including electric vehicles.

Especially in the case of automobiles, the body chassis is equivalent to the ground. Therefore, the electric leakage detection is also important for the prevention of burning of people and vehicles in connection with electricity use. In addition, electric car battery chargers that supply electricity to automobiles should be well insulated from grounding except when detecting short circuits.

Leakage detection uses a device that calculates the resistance through the amount of micro current flowing by applying a constant voltage to the anode and ground of the battery, the cathode and the ground of the battery, or the resistance is calculated through the voltage of each stage by a tester .

That is, in order to detect an electric leakage, the battery of the electric vehicle is located at the lower end of the vehicle, and the anode and the cathode terminals are connected to the ground And thus it is not easy to detect an electric leakage.

In addition, when the battery is contacted with the vehicle ground portion in search of the exposed portions of the positive and negative electrodes of the battery for detecting an electrical leak, the electrical leakage is detected without confirming the safety beforehand, so that the detector may be exposed to a high voltage .

Korean Utility Model Publication No. 1999-025347 (Nov. 20, 2007)

Accordingly, an object of the present invention is to provide a safety inspection apparatus for a portable electric vehicle, which can safely carry out a leakage detection, which is an inspection item for checking an abnormal condition of an electric vehicle, by a simple method.

The portable electric vehicle safety inspection apparatus according to the present invention includes a power supply unit connected to an inlet for supplying electric power for charging an electric vehicle and having a relay for supplying power to the inlet and for turning on / A measuring unit for measuring an insulation resistance of the electric vehicle with a battery when power is supplied to the battery through a power supply unit; and a control unit for generating a notification signal when the insulation resistance value measured by the measurement unit is higher than a preset insulation resistance value And a display unit for displaying a notification signal generated from the control unit.

In the safety inspection device for a portable electric vehicle according to the present invention, the control unit may include a connection confirmation module for confirming whether the inlet is connected to the inlet, a relay operation for operating the power supply when the connection from the connection confirmation module to the inlet is confirmed, An insulation resistance comparison module which receives the insulation resistance value from the measurement unit when the relay is operated by the relay operation module and compares the insulation resistance value with a preset insulation resistance value, And a short circuit judgment module for judging whether a short circuit has occurred.

In the safety inspection apparatus for a portable electric vehicle according to the present invention, the measurement unit measures an insulation resistance using a voltage or a current between an anode and a cathode of the battery and a ground.

In the safety inspection device for a portable electric vehicle according to the present invention, the insulation resistance comparison module compares an average value of insulation resistance measured from the measurement unit with a preset insulation resistance value for a preset time.

In the portable electric vehicle safety inspection apparatus according to the present invention, the display unit displays the remaining amount of the battery.

In the safety inspection device for a portable electric vehicle according to the present invention, a connection part for connecting the inlet to the power supply part and the measurement part, connected to the inlet, connected to the coupling part, And a case in which the control unit and the display unit are disposed.

The portable electric vehicle safety inspection apparatus according to the present invention measures a insulation resistance with a battery while supplying a constant power through an inlet for charging a battery of an electric vehicle and generates a notification signal when the insulation resistance value is higher than a preset insulation resistance value It is possible to safely carry out the electrical leak detection by a simple method without contacting the exposed portions of the positive and negative electrodes of the battery provided in the vehicle with the vehicle ground portion.

Further, the portable electric vehicle safety inspection apparatus according to the present invention includes a connection portion to be coupled with an inlet, a relay for performing leakage detection, a case in which a measurement portion, a control portion, and a display portion are disposed, The leakage current detection can be performed.

1 is a schematic view showing a safety inspection apparatus for a portable electric vehicle according to an embodiment of the present invention.
2 is a block diagram showing an internal configuration of a portable electric vehicle safety inspection apparatus according to an embodiment of the present invention.
3 is a block diagram showing the configuration of a control unit of the portable electric vehicle safety inspection apparatus according to the embodiment of the present invention.
4 is a flowchart illustrating an electrical leak detecting method using a safety inspection apparatus for a portable electric vehicle according to an embodiment of the present invention.

In the following description, only parts necessary for understanding the embodiments of the present invention will be described, and the description of other parts will be omitted so as not to obscure the gist of the present invention.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor is not limited to the meaning of the terms in order to describe his invention in the best way. It should be interpreted as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely preferred embodiments of the present invention, and are not intended to represent all of the technical ideas of the present invention, so that various equivalents And variations are possible.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic view showing a safety inspection apparatus for a portable electric vehicle according to an embodiment of the present invention.

Referring to FIG. 1, a portable electric vehicle safety inspection apparatus according to an embodiment of the present invention may include a connection portion and a case.

The connection unit 110 is coupled to the inlet 200 of the electric vehicle and performs electrical connection with the components for detecting leakage included in the case 120.

Here, the inlet 200 is a part constituting a coupler of an electric vehicle, and is attached to an electric vehicle and connected to a connector of a charging cable for charging the battery. The inlet 200 can be divided into a slow charge inlet and a quick charge inlet. The inlet 200 may be composed of a plurality of fins including an anode, a cathode, and a ground.

The connection part 110 may be formed of a plurality of pins corresponding to the plurality of pins of the inlet 200.

On the other hand, a short circuit is a phenomenon in an electric vehicle designed to be insulated, in which electric current flows to a place where insulation should be broken and not to flow. Here, the electric vehicle should be isolated from the power system and the ground that supply electric power. Here, the ground of the electric vehicle corresponds to the chassis of the vehicle, and there is a danger of electric shock when the electric leakage occurs due to the ground, which may lead to the burning of the person or the electric vehicle.

Accordingly, the connection unit 110 may be coupled to the inlet 200 to detect an exposed portion of an anode and a cathode of a battery included in the vehicle, and to perform an electrical leak detection without directly contacting the vehicle with the vehicle ground.

The case 120 is connected to the connection part 110 and may include a circuit for detecting an electric leakage and internal structures. The case 120 may be connected to the connection portion 110 through a cable as shown in FIG. However, the present invention is not limited thereto, and the case 120 and the connection part 110 may be integrally formed.

Meanwhile, the case 120 and the connection unit 110 may be configured to be detachably attached to each other with a corresponding connection jack.

As described above, the portable electric vehicle safety inspection apparatus 100 according to the embodiment of the present invention includes the case 110 having the connection part 110 coupled with the inlet 200 and the case 120 having the internal components for detecting the electric leakage It is possible to carry out the electric leak detection without any problem at any place.

In the portable electric vehicle safety inspection apparatus 100 according to the present embodiment, internal structures for detecting an electric leakage are provided inside the case 120, but the present invention is not limited thereto. And may be provided with an output means capable of indicating a state of a short circuit to the case 120.

Hereinafter, the internal configuration of the portable electric vehicle safety inspection apparatus 100 according to the embodiment of the present invention will be described in detail.

FIG. 2 is a block diagram illustrating an internal configuration of a portable electric vehicle safety inspection apparatus according to an embodiment of the present invention, and FIG. 3 is a block diagram illustrating a configuration of a control unit of a portable electric vehicle safety inspection apparatus according to an embodiment of the present invention .

2 and 3, a portable electric vehicle safety inspection apparatus 100 according to an embodiment of the present invention includes a power supply unit 10, a measurement unit 30, a control unit 50, and a display unit 70 .

The power supply unit 10 applies power to the battery of the electric vehicle through the inlet 200 to a degree necessary for detecting a short circuit. The power supply unit 10 may be a small battery that can be installed inside the case 120 (see FIG. 1). Accordingly, the portable electric vehicle safety inspection apparatus 100 according to the present embodiment can be configured to be portable.

Also, the power supply unit 10 may include a relay 11 for turning on / off the power supply. The relay 11 can be operated under the control of the control unit 50. [ That is, when the operation of the relay 11 is turned on and the power supply of the power supply unit 10 is performed, the measurement unit 30 can measure the insulation resistance.

Meanwhile, the power supply unit 10 may include a communication circuit capable of communicating with the battery of the electric vehicle. The power supply unit 10 can communicate with the electric vehicle through the communication circuit to receive information on the battery. Accordingly, the power supply unit 10 can collect the status information of the battery, the remaining amount of the battery, and the like. For example, the battery status information may be a failure of the battery, that is, a volume expansion of the lithium ion battery used as the battery, remaining life information, and the like.

When the power supply unit 10 applies a constant direct current voltage to the battery, the measuring unit 30 measures the voltage or current of the anode of the battery, the ground of the power supply unit 10 and the cathode of the battery and the ground of the power supply unit 10 The insulation resistance can be measured by using

The control unit 50 may generate an alarm signal and display the alarm signal to the display unit 70 when the insulation resistance value measured by the measurement unit 30 is higher than the predetermined insulation resistance value.

In order to accurately measure the insulation resistance, the controller 50 determines the insulation resistance through an average value of the insulation resistance for a predetermined time, and compares the insulation resistance with a predetermined insulation resistance value.

In addition, the control unit 50 can collect the residual amount of battery or usage state information in real time through the power supply unit 10, and output the collected remaining amount or usage state information through the display unit 70, have.

The control unit 50 may include a connection confirmation module 51, a relay operation module 53, an insulation resistance comparison module 55, and a leakage determination module 57.

The connection confirmation module 51 can confirm that the connection part 110 is coupled to the inlet 200 by receiving a signal indicating that the connection part 110 is coupled from the connection part 110 when the connection part 110 is connected to the inlet 200. [ At this time, the connection confirmation module 51 may display a notification that the connection unit 110 is coupled to the inlet 200 through the display unit 70. Here, the notification may be a sound, an image, or an image.

The relay operation module 53 can control the operation of the power supply unit 10 by controlling the relay 11 included in the power supply unit 10. [ The relay operation module 53 may be configured to automatically turn on the relay 11 when the connection part 110 is coupled to the inlet 200 or may be configured to be operated through a separate input part . Here, the input unit may include a button for turning on / off the relay operation module 53, or may be formed of a touch panel or the like.

The insulation resistance comparison module 55 may compare the insulation resistance value measured from the measurement section 30 with a predetermined insulation resistance value. Here, the insulation resistance comparison module 55 can determine the insulation resistance through an average value of the insulation resistance for a predetermined time to accurately measure the insulation resistance, and compare the insulation resistance with a preset insulation resistance value.

As described above, the insulation resistance can be calculated by the measurement unit 30, but the present invention is not limited thereto. The insulation resistance may be calculated through the insulation resistance comparison module 55 using the voltage or current measured by the measurement unit 30 can do. At this time, the insulation resistance value can be defined by the resistance value calculated by the voltage or the current, and the predetermined insulation resistance value can be the insulation breakdown reference value.

Here, the failure criterion value can be set to an ISO standard value or a national custom standard. For example, the failure criterion value may be 500? / V (ISO specified value).

The short-circuit judging module 57 can judge whether or not a short circuit has occurred by comparing the results of the comparison by the insulation resistance comparing module 55. That is, when the calculated insulation resistance value is higher than the predetermined insulation resistance value, the leakage determination module 57 can determine that the leakage current is short-circuited and generate an alarm signal. At this time, the leakage determination module 57 may output the generated alarm signal through the display unit 70. [

The display unit 70 displays information on a series of operation states, operation results, and the like that occur during the performance of the function of the portable electric vehicle safety inspection apparatus 100. For example, the display unit 70 can display the result of detecting the electric leakage, the remaining amount of the battery, and the like. The display unit 70 may be a liquid crystal display (LCD), a thin film transistor LCD (TFT-LCD), a light emitting diode (LED), an organic light emitting diode LEDs, active matrix organic light emitting diodes (AMOLED), active matrix OLEDs, retina displays, flexible displays, and three-dimensional displays. In addition, the display unit 70 may be configured as a speaker capable of outputting a warning sound.

As described above, in the portable electric vehicle safety inspection apparatus 100 according to the embodiment of the present invention, a constant power source is supplied through an inlet 200 that supplies electric power for charging a battery of an electric vehicle, A warning signal is generated and displayed when the insulation resistance value is higher than a preset insulation resistance value so as to find an exposed portion of the anode and the cathode of the battery provided in the vehicle and to securely The leakage current detection can be performed.

The safety inspection apparatus 100 for a portable electric vehicle according to an embodiment of the present invention includes a connection unit 110 coupled to an inlet 200, a power supply unit 10 for detecting an electrical leak, a measurement unit 30, (50) and the case (120) in which the display portion (70) is disposed, it is possible to carry out the leakage detection without being affected by the place easily.

Hereinafter, an electrical leak detecting method for a portable electric vehicle safety inspection apparatus 100 according to an embodiment of the present invention will be described with reference to the drawings.

4 is a flowchart illustrating an electrical leak detecting method using a safety inspection apparatus for a portable electric vehicle according to an embodiment of the present invention.

Referring to FIGS. 2 and 4, a safety inspection method for a portable electric vehicle according to an embodiment of the present invention will be described. First, in step S10, when the connection unit 110 is coupled to the inlet 200, The relay 11 of the power supply unit 10 is operated so that the power supply unit 10 supplies the power to the battery of the electric vehicle through the connection unit 110 and the inlet 200.

Next, in step S50, when the power supply unit 10 applies a constant direct current voltage to the battery, the measuring unit 30 determines whether the positive electrode of the battery is connected to the ground of the power supply unit 10 and the negative electrode of the battery, The insulation resistance can be measured using the voltage or current of the capacitor.

Next, in step S70, the control unit 50 may compare the measured insulation resistance value from the measurement unit 30 with a predetermined insulation resistance value. Here, the insulation resistance comparison module 55 can determine the insulation resistance through an average value of the insulation resistance for a predetermined time to accurately measure the insulation resistance, and compare the insulation resistance with a preset insulation resistance value.

Next, in step S71, the controller 50 can determine whether or not a short circuit is present based on the comparison result in step S70. That is, when the calculated insulation resistance value is higher than the predetermined insulation resistance value, the control unit 50 can determine that a short circuit is present and generate an alarm signal.

Here, when it is determined that a short circuit has occurred, the controller 50 may generate an alarm signal and output the generated alarm signal through the display unit 70.

On the other hand, when it is determined that the electric leak is not a short circuit, the controller 50 generates an alarm signal that can identify that the electric leak is not a short circuit, and outputs the alarm signal to the display unit 70.

It should be noted that the embodiments disclosed in the drawings are merely examples of specific examples for the purpose of understanding, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

10: Power supply unit 11: Relay
30: measuring section 50:
51: connection confirmation module 53: relay operation module
55: Insulation resistance comparison module 57: Leakage judgment module
100: Portable electric vehicle safety inspection device 110: Connection
120: Case 200: Inlet

Claims (6)

A power supply unit connected to an inlet for supplying electric power for charging the battery of the electric vehicle, and having a relay for supplying power to the inlet and for turning on / off the power supply;
A measuring unit for measuring an insulation resistance of the battery when power is supplied to the battery through the power supply unit;
A control unit for generating a notification signal when the measured insulation resistance value from the measurement unit is higher than a preset insulation resistance value;
A display unit for displaying a notification signal generated from the control unit;
And the safety inspection device for the portable electric vehicle. The method according to claim 1,
Wherein,
A connection confirmation module for confirming connection with the inlet;
A relay operation module for operating the relay when the connection with the inlet is confirmed from the connection confirmation module;
An insulation resistance comparison module that receives the insulation resistance value from the measurement unit and compares the insulation resistance value with a preset insulation resistance value when the relay is operated by the relay operation module;
A short circuit judging module for judging whether or not the short circuit is present through a comparison value compared by the insulation resistance comparing module;
And the safety inspection device for the portable electric vehicle. 3. The method of claim 2,
Wherein the measurement unit measures an insulation resistance using a voltage or a current between an anode and a cathode of the battery and a ground provided in the measurement unit. The method of claim 3,
Wherein the insulation resistance comparison module compares an average value of the insulation resistance measured from the measurement unit with the preset insulation resistance value for a predetermined time. The method according to claim 1,
Wherein the display unit displays the remaining amount of the battery. The method according to claim 1,
A connection unit coupled to the inlet to connect the inlet to the power supply unit and the measurement unit;
A case connected to the coupling portion and having a space formed therein, the power supply portion, the measurement portion, the control portion, and the display portion being disposed;
Further comprising a control unit for controlling the safety of the portable electric vehicle.

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