KR101343530B1 - Checking device of high voltage contact fusion using photo coupler and hybrid electric vehicle having the same - Google Patents

Abstract

In the high voltage relay contact welding confirmation device according to an embodiment of the present invention, a contact between the first electrode and the relay unit is configured to apply power to a circuit using a battery and whether the contact of the relay unit is fused to each electrode. By including a fusion confirmation circuit unit having a first line for confirming the fusion and a second line for confirming whether the contact fusion of the second electrode or not, the relay fusion can be easily confirmed.

Description

High voltage relay contact fusion verification device using photocoupler and hybrid vehicle equipped with it {CHECKING DEVICE OF HIGH VOLTAGE CONTACT FUSION USING PHOTO COUPLER AND HYBRID ELECTRIC VEHICLE HAVING THE SAME}

One embodiment of the present invention relates to a high voltage relay contact fusion confirmation device that can determine whether the relay contact fusion and a hybrid vehicle having the same.

A hybrid electric vehicle (HEV) is a future vehicle that can reduce emissions and improve fuel efficiency by adopting a motor driving source as an auxiliary power source as well as an engine.

Hybrid vehicles are the vehicles that have the main purpose of ultimately improving fuel efficiency and realizing high efficiency vehicles and improving exhaust performance to realize eco-friendly vehicles.

The power transmission of the hybrid vehicle is directly connected to the engine, the motor, the automatic transmission, and the clutch may be arranged between the engine and the motor.

As a configuration for these operations, a hybrid battery (ie, a high voltage battery) is connected to the motor so as to be charged and discharged through an inverter.

As such, a high voltage battery is used in a hybrid vehicle, in order to protect the hybrid battery, usually connected in series and a relay may be used.

These relays may be fused with each other during use, and high voltage may flow through the circuit.

Therefore, a device capable of confirming physical fusion of the high voltage relay capable of confirming whether the relay contact is fused may be considered.

One object of the present invention is to provide a high voltage relay contact fusion confirmation device having a more improved structure, which can determine whether the relay contact fusion.

In order to achieve the above object of the present invention, the high-voltage relay contact fusion confirmation device according to an embodiment of the present invention, the relay unit is formed to apply power to a circuit using a battery and the relay unit for each electrode A fusion confirmation circuit unit having a first line for confirming whether the first electrode is fused or not and a second line for confirming whether the second electrode is fused or not; The line includes a photocoupler and an LED connected to one end of the photocoupler, respectively, and is configured to identify a contact point for each electrode of the relay unit according to whether the LED is lit.

According to an example related to the present invention, each of the lines may be connected to the photocoupler through a relay and an inverter at each electrode.

According to an example related to the present invention, each of the lines, the path from the inverter to the photocoupler may include at least one resistor to lower the voltage.

According to an example related to the present invention, each of the lines, the path from the inverter to the photocoupler may include at least one transient voltage attenuator.

In addition, another embodiment of the present invention in order to realize the above object, includes a relay contact fusion confirmation device is formed to confirm the contact point for each electrode of the relay unit connected to the battery according to whether the battery and the LED, The relay contact welding device may include: a relay unit configured to apply power to a circuit using the battery, and a first electrode configured to check whether the first electrode contacts are fused so as to confirm whether the relay unit is fused to each electrode. High voltage relay contact welding including a fusion check circuit portion having a second line for checking whether the line and the second electrode are fused, and an LED connected to the photocoupler and one end of the photocoupler, respectively, on the first and second lines. A hybrid vehicle having a confirmation device is disclosed.

The high voltage relay fusion confirming apparatus according to at least one embodiment of the present invention configured as described above may be configured by adding a separate relay fusion confirming LED circuit to an existing high voltage relay circuit without affecting the performance of the existing high voltage relay. Whether or not fusion can be easily confirmed.

In addition, by applying the high voltage relay fusion check device to the hybrid vehicle, it is possible to ensure the safety of the operating personnel and to quickly diagnose the failure.

1 is a view showing an example of a circuit diagram for protecting a battery of a hybrid vehicle according to an embodiment of the present invention.
Figure 2 is a conceptual diagram showing the appearance of a high voltage relay in accordance with an embodiment of the present invention.
3A-3B are cross-sectional views of respective portions in conjunction with the high voltage relay fusion of FIG.
4 is a circuit diagram of a relay contact welding confirmation device according to an embodiment of the present invention.
5 is a conceptual diagram illustrating an example of operation of the relay contact welding confirmation device according to an embodiment of the present invention.

Hereinafter, a high voltage relay contact welding device and a hybrid vehicle having the same using a photocoupler according to the present invention will be described in detail with reference to the accompanying drawings. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the present specification, the same or similar reference numerals are given to different embodiments in the same or similar configurations. As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

1 is a view showing an example of a circuit diagram for protecting a battery of a hybrid vehicle according to an embodiment of the present invention.

Hybrid vehicles may use existing liquid fuels (eg, gasoline, diesel, etc.) and hybrid batteries, which are high voltage batteries.

Referring to FIG. 1, the circuit diagram includes an engine 110 and a motor 120 as a driving source for driving a vehicle, an inverter 130 for converting a driving source from an engine to a motor, and a high voltage battery 140 as a hybrid battery. And a relay circuit 180 for protecting the high voltage battery.

Of course, in the drawings it is shown that the engine 110 and the motor 120 is directly connected, which may be separated and shown as shown for convenience of understanding of an embodiment of the present invention. Referring to the components shown in Figure 1 as follows.

EMS (100: Engine Management System) is responsible for the integrated management of the engine 110, the optimum liquid fuel amount injection and ignition timing based on signals input from various sensors for detecting the operating state of the engine 110 And the like to control the vehicle to achieve the optimum driving performance.

Inverter 130 changes the DC power to three-phase AC power in order to drive the motor, which is usually a PWM (Pulse Width Modulation) switching device (not shown) and an IGBT (Insulated Gate Bipolar). And a gate driver (not shown) that provides a signal to the switching device.

This is for convenience of understanding of an embodiment of the present invention and other configurations may be used as long as the inverter 120 inverts power from the high voltage battery 140 to provide the motor 120.

The high voltage battery 140 is a hybrid battery such as a nickel metal battery or a lithium ion battery, and serves to supply power to the motor 120. Of course, in one embodiment of the present invention, but only for the sake of understanding, it may be a pack consisting of battery cells arranged in series or in parallel, it is also possible to configure a plurality of sub-pack.

The power battery 190 is a battery for supplying power to the relay circuit 180 is usually a DC 12V or 24V is used.

The relay circuit 180 is positioned between the high voltage battery 140 and the inverter 130 to protect the high voltage battery 140. To this end, the relay circuit 180 may be composed of two relays. In this case, one relay controls the other relay circuit.

The battery controller 170 (BMS) manages the high voltage battery 140 and controls the relay circuit 180 to control the power supply of the high voltage battery 140 when the high voltage battery 140 is in a dangerous situation. Do not flow to (130).

The vehicle controller 150 controls the vehicle by exchanging control information with the EMS 100, the battery controller 170, and the motor controller 160. That is, when the engine 110 operates, the vehicle controller 150 controls the engine 110 by exchanging control information about the engine 110 with the EMS 100.

In contrast, when the motor 120 operates, the control information regarding the motor 120 and the high voltage battery 140 is exchanged with the motor controller 160 and the battery controller 170.

Of course, the vehicle controller 150 also serves to control the relay circuit 180. That is, when the vehicle is in an unstable state, the vehicle electrically insulates between the high voltage battery 140 and the inverter 130. Of course, a switching means may be provided for this.

The motor controller 160 exchanges control information with the vehicle controller 150 and the battery controller 170 to control the motor 120. In addition, in order to control the rotation speed of the motor 120, RPM (Revolutions Per Minute) information of the motor 120 is obtained from the motor 120, and the information is used to control the motor 120.

Of course, the motor 120 has been described as using a three-phase AC power source, one embodiment of the present invention is not limited to this, single phase is also possible.

The communication between the vehicle controller 150, the motor controller 160, the battery controller 170, and the like is generally used in a controller area network (CAN) communication method, but is not limited thereto. Other communication methods may also be used.

2 is a conceptual diagram illustrating a high voltage relay appearance according to an embodiment of the present invention, and FIGS. 3A to 3B are cross-sectional views illustrating respective parts of the high voltage relay fusion of FIG. 1, and FIG. 4 is a view of one embodiment of the present invention. FIG. 5 is a circuit diagram illustrating a relay contact welding confirming device according to an embodiment, and FIG. 5 is a conceptual diagram illustrating an example of an operation of a relay contact welding confirming device according to an embodiment of the present invention.

In order to apply power to a circuit using a high voltage battery, a high voltage relay 210 is used as a switch. When the high voltage relay 210 is supplied with 24 V power to the relay operation + power supply 214 and the relay operation power supply 213, the relay + terminal 211 and the relay terminal 212 are connected to each other so that electricity flows.

In general, when a high voltage is applied, a safety device may be configured to smoothly increase the voltage using a precharge resistor without applying the high voltage at once.

After that, the negative pole relay 231 of the system battery is connected first, followed by the positive pole relay 221. However, when the precharge does not operate normally or the residual current remains on the high voltage circuit, the contacts of the high voltage relay are fused together.

In the case of fusion, the relay lower contact 215 and the relay upper contact 216 are attached to each other as shown in FIGS. 3A to 3B so that a high voltage flows in the circuit as it is not shorted even when the operating voltage of the relay is released. do. It is impossible to know whether the relay contacts are physically fused until the cable is disassembled and the both ends are directly checked by the tester.

The high voltage relay contact welding device of the present invention comprises a circuit as shown in FIG. 4 to confirm the welding of the high voltage relay to the + and − poles of the battery in order to ensure the safety of the operating personnel. ) And -pole relay fusion check LED (236) can be checked whether the relay fusion.

According to one embodiment of the present invention, a high voltage relay contact welding confirmation device includes a relay unit and a welding confirmation circuit unit. The welding confirmation circuit unit includes a first line (Line 1) for checking whether the first electrode is fused and a second line (Line 2) for checking whether the second electrode is fused.

 The first and second lines Line 1 and Line 2 include photocouplers 225 and 235 and LEDs 226 and 236 connected to one end of the photocoupler, respectively, according to whether the LED is turned on or not. It is formed to confirm the contact point for each electrode.

The photocoupler emits a certain amount of light from the light emitting part to the light receiving part during welding, and the light receiving part converges the light emitted from the light emitting part. The photocoupler senses a minute current input to the photocoupler to emit light. The light receiver will converge the light and eventually the LED will turn on.

Each of the lines is formed to be connected to the photocouplers 225 and 235 via relays 221 and 231 and an inverter at each electrode. In addition, each of the lines, the path from the inverter to the photocoupler may include at least one resistor (223, 233) to lower the voltage.

Each of the lines may include at least one transient voltage attenuator 224 or 234 connected to the photocoupler from the inverter.

Here, the first line connecting the existing battery + pole and + pole relay 221 and the + pole inverter and the second line connecting the battery-pole and-pole relay 231 and the-pole inverter are + poles as shown in FIG. 4. Both ends of the relay fusion confirmation LED circuit unit 241 and the negative pole relay fusion confirmation LED circuit unit 251 are connected to each other.

 First, when the + pole relay 221 is fused, the high voltage is lowered to a low voltage by the high voltage resistor 223 along the + pole relay fusion flow line 240 starting from the battery + pole. The coupler 225 moves to the battery pole.

At this time, the transient voltage attenuator 224 ensures the stability of the circuit, and when the + pole photocoupler 225 is activated, the + pole relay fusion confirmation LED 226 is turned on as a current flows.

On the contrary, when the -pole relay 231 is fused, the high voltage is lowered to a low voltage by the high voltage resistor 233 along the -pole relay fusion flow line 250 starting from the battery + pole and through the -pole photocoupler 235. Move to battery-pole.

At this time, the transient voltage attenuator 234 ensures the stability of the circuit, and when the -pole photocoupler 235 is activated, the current flows through the -pole relay welding confirmation LED 236 is turned on. When the relay is fused, the LED is turned on as shown in FIG. 5, so that the user can check whether the relay is fused.

The high voltage relay contact welding device using the photocoupler described above and the hybrid vehicle having the same are not limited to the configuration and method of the embodiments described above, but the embodiments may be modified in various ways. All or part of each of the embodiments may be configured to be selectively combined so that.

210. High Voltage Relay
211.Relay + Terminal
212.Relay-terminal,
213. Relay Operation-Power
214. Relay Operation + Power
215. Relay bottom contact
216. Relay upper contact
221. + pole relay
223.Polar high voltage resistance
224.Polar transient voltage attenuator
225. + pole photocoupler
226. + pole relay welding confirmation LED
231. -pole relay
233. -Polar high voltage resistance
234. -pole transient breaker
235. -pole photocoupler
236.-Pole relay welding confirmation LED
240. + pole relay fusion flow line
241. Both ends of + pole relay welding confirmation LED circuit part
250. -pole relay fusion flow line
251. Both ends of pole relay welding LED circuit

Claims (5)

A relay unit configured to apply power to a circuit using a battery; And
A fusion confirmation circuit unit having a first line for confirming whether the first electrode is fused or not, and a second line for confirming whether the second electrode is fused or not; ,
Each of the first and second lines includes a photocoupler and an LED connected to one end of the photocoupler, respectively, to identify a contact point for each electrode of the relay unit according to whether the LED is turned on.
Each of the lines,
High voltage relay contact welding confirmation device, characterized in that connected to the photocoupler via a relay, an inverter at each electrode. delete The method of claim 1,
Each of the lines,
And the path from the inverter to the photocoupler includes at least one resistor to lower the voltage. The method of claim 3,
Each of the lines,
And the path from the inverter to the photocoupler includes at least one transient voltage attenuator. battery; And
And a relay contact welding confirmation device configured to check a contact point of each electrode of the relay unit connected to the battery according to whether the LED is turned on.
The relay contact welding confirmation device,
A relay unit configured to apply power to a circuit using the battery; And
A fusion confirmation circuit unit having a first line for confirming whether the first electrode is fused or not and a second line for confirming whether the second electrode is fused or not; And
LEDs connected to one end of the photocoupler and the photocoupler on the first and second lines, respectively,
Each of the lines,
A hybrid vehicle having a high voltage relay contact welding confirmation device, characterized in that connected to the photocoupler via a relay and an inverter at each electrode.

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