KR102678384B1 - Power stabilizing apparatus for vehicles - Google Patents

Abstract

The present invention relates to a power stabilization device for vehicles. The vehicle power stabilization device of the present invention forms a plurality of channels that supply power from the battery to each of a plurality of electronic devices installed in the vehicle, and distributes and supplies power through the channels. The vehicle power stabilization device is provided with a connector for installing an electronic device in each channel. A power stabilization device is provided between the battery and the electronic devices. According to the present invention, a plurality of channels are formed to supply power from the battery to each of the various electronic devices installed in the vehicle, and an electronic device is installed for each channel to supply power to each of the electronic devices, voltage detection, and surge protection. , Over-voltage protection, low-voltage protection, delay time control, etc. are provided to ensure a stable power supply. When installing electronic devices, electrical connections can be made without touching the wiring, preventing electrical accidents such as fires. In addition to stabilizing the vehicle's power, stable operation of electronic devices installed in the vehicle is possible.

Description

Power stabilization device for vehicles {POWER STABILIZING APPARATUS FOR VEHICLES}

The present invention relates to a power stabilization device for vehicles. More specifically, in order to stably supply power from the vehicle battery to each of various electronic devices installed in the vehicle, power is distributed to a plurality of channels and voltage for each channel is adjusted. A vehicle power supply that senses surge protection, overvoltage protection, low voltage protection, automatic power transfer, and delay functions to stably supply power to each electronic device installed in each channel, thereby enabling stable operation of the electronic devices. It's about stabilization devices.

Typically, a vehicle is equipped with a battery that supplies power at all times, and a generator that is driven by the battery and supplies power to various electrical devices such as indoor and outdoor lamps, instruments, and air conditioners of the vehicle. When starting the vehicle, the vehicle's battery rotates the starter motor to drive the engine, and a generator connected to the engine and a fan belt generates electricity to charge the battery. Also, in the case of electric vehicles, a high-capacity battery is used to drive the motor to drive the vehicle.

Recently, there has been a rapid increase in the change from regular buses, which are internal combustion engine vehicles, to environmentally friendly electric buses. In the case of these general buses and electric buses, the number of electronic devices with various functions that consume power within the vehicle is increasing. Accordingly, there are frequent cases where electronic devices installed in the vehicle are affected due to a phenomenon such as initial start-up or a power surge other than a constant voltage in certain situations.

However, since there are no or few terminals inside the current electric bus to which the increasing number of electronic devices can be connected, electronic devices are being installed through direct connection to the battery. This increases the complexity of the power connection, damages the wiring and devices within the bus due to overvoltage, raises the possibility of fire due to a short circuit in the wiring connection area, and makes maintenance management inconvenient.

For example, electric buses are continuing to spread among the current bus fleet, and the proportion of Chinese imported vehicles among domestic electric buses is continuing to increase. Currently, multiple domestic bus suppliers and Chinese bus suppliers are supplying electric buses in Korea, but various electronic devices installed on electric buses, such as video recording devices, terminals and modems for transportation card payment, and arrival information LEDs Panels, CCTV, etc. are installed on each vehicle by a separate mechanic or individual business operator after the vehicle is shipped. However, unlike internal combustion engine vehicles, electric buses do not have a fuse box, so electronic devices are installed by connecting power directly from the vehicle's battery. Electronic equipment companies are different, installation times are different, and it is difficult to connect power directly from the battery, so the initially connected wiring is difficult. It is currently being installed as a bridge. If this causes poor contact in the power wiring, it is very dangerous because it can lead to a vehicle fire or breakdown.

In particular, in the case of most electric buses made in China, there is only one port that supplies power to the electronic devices installed inside the vehicle, so when additional electronic devices are installed, the power source is bridged. In this case, the bridge is made by touching the wiring for power supply, which can cause unstable power supply, unstable operation of electronic devices, and the risk of fire, which can cause accidents while driving the electric bus. there is.

Korean Patent Publication No. 10-2155041 (announcement date: September 11, 2020) Korean Patent Publication No. 10-1551068 (announcement date: September 7, 2015) Korean Patent Publication No. 10-0581288 (announcement date: May 17, 2006) Korean Patent Publication No. 10-2403285 (announcement date: May 30, 2022)

The purpose of the present invention is to provide a vehicle power stabilization device for stable power supply to various electronic devices installed in the vehicle.

Another object of the present invention is to distribute power by forming a plurality of channels that supply power from the battery to various electronic devices installed in the vehicle, thereby providing a vehicle power supply to facilitate installation, expandability, and maintenance of the electronic devices. It provides a stabilizing device.

Another object of the present invention is to provide a plurality of channels for distributing power to various electronic devices installed on the bus, and to provide functions such as voltage detection for each channel, overload protection, surge protection, overvoltage protection, undervoltage protection, and delay time adjustment. The aim is to provide a power stabilization device for vehicles that enables stable operation of electronic devices.

In order to achieve the above objectives, the vehicle power stabilization device of the present invention forms a plurality of channels that supply power from the battery to each of the various electronic devices installed in the vehicle, and provides voltage detection, surge protection, overvoltage protection, and low voltage protection for each channel. One of its features is that it provides protection and delay time control to ensure a stable power supply. The vehicle power stabilization device of the present invention enables stable operation of electronic devices installed in the vehicle along with power stabilization.

The bus power stabilization device of the present invention according to this feature forms a plurality of channels for distributing power supplied from a vehicle battery, and each of a plurality of electronic devices provided in each of the channels and installed in the vehicle is electrically a plurality of connectors mounted to be connected and receiving power from the battery; a plurality of delay circuits switched to supply power from the battery to each of the connectors according to a set delay time; An automatic transfer circuit that automatically switches the power supply to another channel when a failure occurs while supplying power to a specific channel; A DC/DC converter that receives power from the battery and outputs power to each of the electronic devices installed in each channel; And when power is supplied from the battery, control the DC/DC converter, detect the voltage supplied for each channel, set a delay time to adjust the power supply to each channel, and configure the channel in response to the delay time. It includes a control unit that controls the delay circuits to sequentially supply power to the delay circuits.

In this feature, the DC/DC converter is provided as a buck-boost converter, and includes first to fourth switches provided between the battery and the delay circuit; an inductor provided between the second and third switches and charging and discharging power supplied from the battery by switching operations of the first to fourth switches; a sensing resistor that senses the voltage across the inductor according to the switching operations of the second and third switches; And receiving control from the control unit to control the first to fourth switches to selectively switch according to the input voltage of the power supplied from the battery, and comparing the voltage detected from the sensing resistor with a reference voltage to operate in buck mode. , and a buck-boost controller that selectively controls the first to fourth switches to operate in boost mode and buck-boost mode.

In this feature, the vehicle power stabilization device is configured by grouping a plurality of channels corresponding to one of the DC/DC converters; The automatic switching circuit is provided in one channel among the grouped channels, and the DC/DC converter is provided in the remaining channel, so that the automatic switching circuit and the DC/DC converter are connected in parallel with each other; Then, the remaining channels are branched by the DC/DC converter, and the delay circuit and the connector are provided in each of the remaining channels.

As described above, the vehicle power stabilization device of the present invention is provided between a vehicle battery and a plurality of electronic devices that provide various functions to form a channel to supply power to each of the electronic devices from the battery to the electronic devices. It enables stable power supply and stable operation of electronic devices.

In addition, the vehicle power stabilization device of the present invention forms a plurality of channels that distribute power supply to each of a plurality of electronic devices, sets a delay time for each channel, and controls the electronic devices to start in the set order to supply power. By supplying power to the electronic devices at the same time when starting the vehicle, the problem of overloading the battery can be solved, unnecessary discharge of the battery can be prevented, and the stability of the electronic devices can be ensured.

In addition, the vehicle power stabilization device of the present invention provides functions such as voltage detection, surge protection, overvoltage protection, undervoltage protection, and automatic transfer for each of the plurality of channels that supply power from the battery to each of the various electronic devices installed in the vehicle to ensure stable power supply. Supply can be made.

In addition, the power stabilization device for a vehicle of the present invention, in addition to power stabilization, enables electrical connection by mounting the electronic device to the connector without touching the wiring when connecting additional electronic devices to the vehicle, thereby preventing electrical accidents such as fire. You can.

In addition, the vehicle power stabilization device of the present invention installs electronic devices through connectors mounted on a plurality of channels, so that each electronic device business can conveniently install it without unnecessary wiring work.

In addition, the vehicle power stabilization device of the present invention can be modularized to make it smaller and slimmer, and electrical wiring can be gathered in one place, which can have a positive effect on the aesthetics of the bus interior.

1 is a block diagram showing a schematic configuration for power supply to a vehicle equipped with a power stabilization device according to the present invention;
Figure 2 is a block diagram showing the configuration of the power stabilization device shown in Figure 1;
Figure 3 is a circuit diagram showing the configuration of the switching voltage conversion circuit shown in Figure 2, and
Figure 4 is a diagram showing the configuration of a power stabilization device installed on a bus according to an embodiment of the present invention.

Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited by the embodiments described below. This example is provided to more completely explain the present invention to those with average knowledge in the art. Therefore, the shapes of components in the drawings are exaggerated to emphasize a clearer explanation.

The power stabilization device for a vehicle according to the present invention forms a plurality of channels that supply power from the battery to each of the various electronic devices installed in the vehicle, and an electronic device is installed for each channel to supply power to each of the electronic devices and to supply voltage to each of the electronic devices. It provides detection, surge protection, overvoltage protection, undervoltage protection, and delay time control to ensure a stable power supply.

Therefore, the vehicle power stabilization device of the present invention enables stable operation of electronic devices installed in the vehicle as well as stabilization of the vehicle's power.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the attached FIGS. 1 to 4.

Figure 1 is a block diagram showing a schematic configuration for power supply to a vehicle equipped with a power stabilization device according to the present invention.

Referring to FIG. 1, the vehicle 2 of the present invention is equipped with, for example, a regular bus, an electric bus, etc., and a plurality of electronic devices installed inside the vehicle 2 from the battery 10 to provide various functions. A power stabilization device 100 is provided to supply stable power to the devices 200.

Here, the electronic device 200 includes, for example, a destination LED display board installed inside the bus vehicle 2, a route information electronic signboard, a bus monitor device, an empty seat display device, a video recording device (DVR, NVR), a transportation card payment terminal, It may include communication devices for transportation card payment, arrival information LED devices, CCTV cameras, rear sensors, navigation, black boxes, driver assistance systems (ADAS), etc.

In general, a vehicle 2 such as an internal combustion engine bus or electric bus uses an alternator (or motor) 20 and a battery 10 to control all electrical devices of the vehicle 2 (e.g., lamps, instruments, and air conditioners). etc.) or electronic devices 200. That is, the general internal combustion engine vehicle 2 supplies power using an alternator 20 and a battery 10, and the electric vehicle 2 uses a high-voltage battery 10 and a motor 20. Supply power.

And the power stabilization device 100 stably supplies power from the battery 10 of the vehicle 2 to the electronic devices 200, and for stable operation of the electronic devices 200, one electronic device ( 200 forms a plurality of channels that are electrically connected, and power to the electronic device 200 is distributed and supplied through each channel.

That is, the vehicle power stabilization device 100 according to the present invention is designed to solve the problem of overloading the battery 10 due to simultaneous power supply to a plurality of electronic devices 200 when starting the vehicle. A plurality of channels are formed to distribute power supply to each of the devices 200, a delay time is set for each channel, and power is supplied by controlling the electronic devices 200 to start in a set order.

In general, when the ignition key 30 of the general bus or electric bus 2 is activated, power is supplied from the battery 10 to all electronic devices 200 at the same time, resulting in an irregular power supply state, which causes the electronic devices (200) becomes unstable. Accordingly, the power stabilization device 100 detects the voltage of each of the plurality of channels and controls to supply power sequentially according to the delay time set for each channel.

Therefore, the vehicle power stabilization device 100 of the present invention can stably supply power from the battery 10 to the electronic devices 200 mounted on each channel and enable stable operation of the electronic devices 200. there is.

In addition, the vehicle power stabilization device 100 of the present invention, in addition to power stabilization, allows connection to ports (connectors) without touching the wiring when connecting an additional electronic device 200 to the vehicle 2, thereby preventing electrical accidents such as fire. can be prevented.

Specifically, the function and operation of the power stabilization device according to the present invention will be described in detail.

FIG. 2 is a block diagram showing the configuration of the power stabilization device shown in FIG. 1, FIG. 3 is a circuit diagram showing the configuration of the switching voltage conversion circuit shown in FIG. 2, and FIG. 4 is a circuit diagram showing the configuration of the power stabilization device shown in FIG. 1 according to an embodiment of the present invention. This is a diagram showing the configuration of the power stabilization device installed on the bus.

Referring to FIGS. 2 to 4, the power stabilization device 100 of the present invention forms a plurality of channels to stably supply power to various electronic devices (200 in FIG. 1) installed inside the vehicle, and the channels Each voltage is detected, a delay time for each channel is set, and power is sequentially supplied to each channel from the battery 10 according to the set delay time.

At this time, the power stabilization device 100 distributes the power supplied from the battery 10 to prevent overload of the various electronic devices 200 according to the amount of power consumed by each of the electronic devices 200 installed in each channel. supplies power to

For this purpose, the power stabilization device 100 includes a control unit 102, a plurality of fuses 110 to 114, an automatic transfer circuit 120, a DC/DC converter 130, a plurality of delay circuits 140, 142, and a plurality of It includes connectors 150 to 154.

Specifically, connectors 150 to 154 are installed in each of the plurality of channels and are provided to electrically connect each of the various electronic devices 200. Each of the connectors 150 to 154 supplies power from the battery 10 to the electronic device 200 mounted on each channel. The connectors 150 to 154 are provided to facilitate the attachment and detachment of the electronic devices 200, and may be added to expand the channel to enable installation of additional electronic devices 20.

If the power supplied to each channel from the battery 10 is a surge, overvoltage, or overcurrent, the fuses 110 to 114 are blown to prevent damage to the electronic device 200 due to this and block the power supply to each channel. These fuses 110 to 114 may be provided in a fuse box.

The automatic switching circuit 120 automatically switches power to be supplied through another channel if a failure occurs in a specific channel while supplying power from the battery 10. In other words, the automatic transfer circuit 120 ensures that if a failure due to a circuit, connector, etc. occurs in a specific channel during power supply, power is always applied to electronic devices with essential or important functions for the operation of the vehicle 2. Switch the channel to another normal channel. Therefore, by forming some channels in parallel and connecting them through the automatic switching circuit 120, it is possible to prevent power supply to important electronic devices from being cut off when a failure occurs in the corresponding channel.

The delay circuits 140 and 142 are controlled by the control unit 102 and open and close each channel according to a set delay time. If the power supplied from the battery 10 is low voltage, the delay circuits 140 and 142 open and close the channel according to the set delay time. The delay circuits 140 and 142 are opened and closed to sequentially supply power according to the delay time set by the control unit 102. Here, the delay time is set to minimize the load on the battery 10 that occurs as power is supplied to all electronic devices 200 at the same time when starting the vehicle, and through this, the power of the electronic devices 200 is sequentially increased. Supply can be controlled. Therefore, the delay circuits 140 and 142, for example, when the control unit 102 detects the ACC power of the ignition key 30, temporarily cuts off power to channels except for important electronic devices before the generator or motor operation. A delay time can be set, thereby preventing unnecessary discharge of the battery 10.

When power is supplied from the battery 10, the DC/DC converter 130 converts the voltage into a voltage suitable for the load level of each electronic device 200 of the corresponding channel and outputs it. The DC/DC converter 130 is, for example, a high-efficiency buck-boost converter. The DC/DC converter 130 supplies power from the converted voltage from one channel to each of the plurality of branched sub-channels.

Specifically, the DC/DC converter 130 according to an embodiment of the present invention is provided as a buck-boost converter, and as shown in FIG. 3, the input terminal (V _IN ) and the output terminal (V _OUT ) are connected. Includes filters (L _IN , C _IN ), first to fourth switches (A to D), inductor (L), sensing resistor (R _SENSE ), output filter (C _OUT ), and buck-boost controller 132. do.

The input filter (L _IN , C _IN ) filters the square wave input current of the power supply (V _IN ) supplied from the battery 10. The first to fourth switches A to D are selectively switched under the control of the buck-boost controller 132. The inductor L is charged or discharged with input power according to the switching operations of the first to fourth switches A to D. The sensing resistor (R _SENSE ) detects the voltage of the inductor (L) according to the switching operation of the second and third switches (B, C). That is, the sensing resistor (R _SENSE ) monitors the charging current of the inductor (L) by detecting the voltage at both ends (SNS ⁺ , SNS ^- ), and transmits the sensed voltage to the buck-boost controller 132. The output filter (C _OUT ) filters to remove voltage ripple of the output power. And the buck-boost controller 132 controls the DC/DC converter 130 to operate in synchronous buck mode, boost mode, or buck-boost mode depending on the input voltage.

That is, the buck-booster controller 132 is provided as, for example, a 4-switch controller and performs a synchronous buck mode, boost mode, and buck-boost mode that are automatically switched depending on the input voltage (V _IN ), thereby performing the first The to fourth switches (A to D) are controlled to be selectively switched.

Here, the operating order of the first to fourth switches (A to D) is synchronized with the duty cycle of the synchronization signal and depends on whether the input voltage (V _IN ) is greater than, approximately equal to, or less than the desired output voltage (V _OUT ). It changes.

Specifically, the buck-booster controller 132 operates in buck mode when the input voltage (V _IN ) is greater than the output voltage (V _OUT ). That is, the fourth switch (D) is turned on (ON), and the third switch (C) is turned off (OFF). When each cycle of the synchronization signal starts, the second switch (B) is turned on first, and the current of the inductor (L) is increased by the buck-boost controller 132 detecting the voltage across the sensing resistor (Rsense) (SNS ⁺ , SNS ^- ). and is determined by comparing the sensed voltage with the internal reference voltage. When the sense voltage falls below the reference voltage, the second switch (B) turns off and the first switch (A) turns on for the remainder of the cycle. The first switch (A) and the second switch (B) turn on and off alternately, operating like a typical synchronous buck regulator. At this time, the duty cycle of the first switch (A) increases until it reaches 94% to 96% of the maximum duty cycle of the DC/DC converter 130 in buck mode.

Afterwards, when the input voltage (V _IN ) approaches the output voltage (V _OUT ), the maximum duty cycle is reached, and the buck-boost controller 132 switches to buck-boost mode. When the cycle begins with the buck-boost mode with the second switch (B) and the fourth switch (D) turned on, the first switch (A) and the third switch (C) are turned on. The third switch (C) is then turned off, the first switch (A) is turned on, and the fourth switch (D) is turned on for the remainder of the cycle. However, if the buck-boost controller 132 starts with the first switch (A) and the third switch (C) turned on, the second switch (B) and the fourth switch (D) are turned on, and then the second switch (B) and the fourth switch (D) are turned on. Switch B is turned off, fourth switch D remains on, and first switch A is turned on for the remainder of the cycle.

Also, when the input voltage (V _IN ) is much lower than the output voltage (V _OUT ), the buck-boost controller 132 operates in boost mode. That is, the first switch (A) is always turned on, and the second switch (B) is always turned off. When each cycle starts, the third switch (C) is turned on first and the current in the inductor (L) is monitored through the sensing resistor (R _SENSE ). When the voltage across the sensing resistor (R _SENSE ) (SNS ⁺ , SNS ^- ) rises above the reference voltage, the third switch (C) is turned off and the fourth switch (D) is turned on during the remaining cycle. The third switch (C) and the first switch (A) turn on and off alternately and operate like a typical synchronous boost regulator. The duty cycle of the third switch (C) decreases until the minimum duty cycle of the DC/DC converter 130 reaches 4% to 6% in boost mode. Once this minimum duty cycle is reached, buck-boost controller 132 switches to buck-boost mode.

And the control unit 102 controls the operation of the DC/DC converter 130 when power is supplied from the battery 10. The control unit 102 detects the voltage of the power supplied from the battery 10 for each channel and controls the delay circuits 140 and 142 to be sequentially opened and closed according to the set delay time. To this end, the control unit 102 sets a delay time for each channel and controls the delay circuits 140 and 142 to sequentially supply power to each channel according to the set delay time.

The power stabilization device 100 of the present invention is provided in the form of a case to facilitate installation inside the vehicle 2, and is provided with a connector (i.e., input port) on one side to receive power from the battery 10, On the other side, a plurality of connectors (i.e., output ports) 150 to 154 through which the electronic devices 20 are electrically connected are provided.

In addition, the power stabilization device 100 distributes power to a plurality of channels to supply power from the battery 10 at a constant voltage to the electronic devices 200 mounted on the connectors 150 to 154, and to other devices in the vehicle 2. It is adjusted so as not to affect the electric or electronic device 200 to prevent all equipment of the vehicle 2 from going down at the same time, thereby enabling stable operation of the vehicle and the electronic device 200.

As shown in FIG. 4, the power stabilization device 100 according to an embodiment of the present invention receives a direct current voltage, for example, in the range of 18V to 30V, from the battery 10 of a bus vehicle and supplies 24V to each of a plurality of channels. Outputs a direct current voltage of

The power stabilization device 100 distributes 24V power to more than 8 channels, provides surge protection, overvoltage protection, undervoltage protection, and sets delay times for each channel, and automatically provides power to important equipment in the event of a power board failure. A switching circuit 120 is built-in. The control unit 102 detects the ACC power and cuts off power except for important equipment before operating the generator or motor to prevent unnecessary discharge of the battery 10.

This power stabilization device 100 ensures scalability in the number of channels to facilitate additional installation of the electronic device 200, and is provided in the form of a housing with a plurality of ports to facilitate maintenance. In addition, it prevents electrical instability factors such as overvoltage, low voltage, and surges in advance to maintain a stable power supply. For major equipment, a switching function is provided to process power supply in parallel to prevent power supply interruption due to port failure.

To this end, the power stabilization device 100 of this embodiment is configured by grouping a plurality of channels corresponding to one DC/DC converter (130: 130a, 130b). In addition, the power stabilization device 100 is provided with one automatic switching circuit (120a, 120b) and one DC/DC converter (130a, 130b) connected in parallel for each channel group.

Specifically, the power stabilization device 100 of this embodiment includes at least one emergency connector 150 that supplies power at all times from the battery 10, and 10 electronic device connectors 152 mounted on each of 10 channels. 154a ~ 154d) are provided. Of course, channels can be expanded as needed.

In addition, the power stabilization device 100 is configured by grouping a plurality of channels into two corresponding to one DC/DC converter (130: 130a, 130b). That is, the first group is provided with first to fifth electronic device connectors 152, 154a to 154d connected to each of the first to fifth channels (channels 1 to 4, reserve 1), and the second group is provided with Connectors 154e to 154i for 6th to 10th electronic devices are provided, respectively, connected to the 6th to 10th channels (channels 5 to 8, spare 2).

For the first group, the first channel (channel 1) includes a first fuse 110 and a first delay circuit 140 between the battery 10 and the first electronic device connector 152.

The second to fifth channels (channels 2 to 4, spare 1) are equipped with second and third fuses (112a, 114a), a first automatic transfer circuit (120a), and a first DC/DC converter (130a). , a sub-channel branched from the first DC/DC converter 130a is formed and each of the second to fifth electronic device connectors 154a to 154d is mounted. The second fuse 112a and the first automatic transfer circuit 120a are connected in series between the battery 10 and the first DC/DC converter 130a, and the third fuse 114a and the first DC/DC converter are connected in series. The converter 130a is connected in series between the battery 10 and the second to fifth electronic device connectors 154a to 154d, and includes the first automatic transfer circuit 120a and the first DC/DC converter 130a. are connected in parallel with each other to the battery 10. Additionally, second to fourth delay circuits 142a to 142c are provided between the first DC/DC converter 130a and the second to fifth electronic device connectors 154a to 154d. At this time, the fourth and fifth electronic device connectors 154c and 154d are respectively mounted on the fourth and fifth channels (channel 4, spare 1) branched from the fourth delay circuit 142c.

Additionally, the 6th to 10th channels (channels 5 to 8, reserve 2) of the second group are configured generally similarly to the channels of the first group.

That is, the 6th to 10th channels (channels 5 to 8, spare 2) include the 4th and 5th fuses (112b, 114b), the second automatic transfer circuit (120b), and the second DC/DC converter (130b). A sub-channel branched from the second DC/DC converter 130b is formed, and each of the sixth to tenth electronic device connectors 154e to 154i is mounted.

The fourth fuse 112b and the second automatic transfer circuit 120b are connected in series between the battery 10 and the second DC/DC converter 130b, and the fifth fuse 114b and the third DC/DC The converter 130b is connected in series between the battery 10 and the sixth to tenth electronic device connectors 154e to 154i, and includes a second automatic transfer circuit 120b and a second DC/DC converter 130b. are connected in parallel with each other to the battery 10. Additionally, fifth to eighth delay circuits 142d to 142g are provided between the second DC/DC converter 130b and the sixth to tenth electronic device connectors 154e to 154i. At this time, the 9th and 10th electronic device connectors 154h and 154i are mounted on each of the 9th and 10th channels (channel 8, spare 2) branched from the eighth delay circuit 142g.

And the control unit (MCU) 102 is electrically connected to the battery 10 and each of the first to tenth channels (channels 1 to 4, spare 1, channels 5 to channel 8, spare 2). The control unit 102 sets the delay time for each channel, for example, in the range of about 500 ms to 1 second.

In this embodiment, each of the first and second automatic transfer circuits 120a and 120b is provided as a relay circuit, and each of the first to eighth delay circuits 140, 142a to 142g is provided as a switching circuit, Each of the first and second DC/DC converters 130a and 130b is equipped with a buck-boost converter shown in FIG. 3.

A 24V, 300W destination information board is installed in the first channel (channel 1), a 24V, 60W route information signboard is installed in the second channel (channel 2), and a 24V, 60W bus monitor is installed in the third channel (channel 3). , a 24V, 15W vacancy display device is installed in the fourth channel (channel 4), and the fifth channel (spare 1) is used as a spare power source of 24V, 100W.

In addition, the 6th channel (channel 5) is a 24V, 100W transportation card payment terminal, the 7th channel (channel 6) is a 24V, 10W transportation card payment communication device (modem), and the 8th channel (channel 7) is a 24V, A 40W rear sensor, a 24V, 3.5W ADAS system is installed in the 9th channel (channel 8), and the 10th channel (spare 2) is used as a 24V, 50W spare power source.

Therefore, the power stabilization device 100 of this embodiment receives power from the battery 10, supplies power at all times to at least one channel for always supplying power to important equipment, and distributes power to each of a plurality of other channels. And the control unit 102 controls the first and second DC/DC converters 130a and 130b to supply a stable voltage for each channel. At this time, in each of the first and second groups, one of the third and fifth fuses (114a, 114b) is blown due to surge, overvoltage, overcurrent, etc., or the first and second DC/DC converters (130a, 130b) are disconnected. If a failure occurs in any one of the channels, it is automatically switched through the first or second automatic transfer circuit (120a or 120b) and operates to supply power to the corresponding channels.

In addition, the power stabilization device 100 has the control unit 102 detecting the voltage of each channel, and when the bus vehicle starts, power is supplied from the battery 10 to all electronic devices 200 at the same time to prevent overload. To prevent this from occurring, each of the first to fourth delay circuits 140, 142a to 142g is sequentially controlled according to a set delay time.

In addition, the power stabilization device 100 uses the automatic transfer circuit 120, so that when a failure due to a circuit, connector, etc. occurs in a specific channel during power supply, the electronic devices with essential or important functions for the operation of the vehicle 2 By automatically switching the channel to another normal channel so that power can always be applied, the power supply to important electronic devices can be prevented from being cut off when a malfunction occurs in the channel.

In the above, the configuration and operation of the power stabilization device for a vehicle according to the present invention are shown in accordance with the detailed description and drawings, but this is merely an example and various changes and modifications are made without departing from the technical spirit of the present invention. This is possible.

2: vehicle
10: battery
20: Alternator (or motor)
30: Ignition key
100: Power stabilizer
102: control unit
110 ~ 114: Fuse
120: automatic transfer circuit
130: DC/DC converter
132: Buck-boost controller
140, 142: delay circuit
150 ~ 154: Connector
200: electronic device

Claims (3)

In automotive power stabilization devices:
A plurality of channels are formed to distribute power supplied from the battery of the vehicle, and a plurality of electronic devices provided in each of the channels and installed in the vehicle are electrically connected to each other and receive power from the battery. connector;
a plurality of delay circuits switched to supply power from the battery to each of the connectors according to a set delay time;
An automatic transfer circuit that automatically switches the power supply to another channel when a failure occurs while supplying power to a specific channel;
A DC/DC converter that receives power from the battery and outputs power to each of the electronic devices installed in each channel; and
When power is supplied from the battery, the DC/DC converter is controlled, the voltage supplied to each channel is detected, a delay time to adjust the power supply to each channel is set, and the channels are connected in response to the delay time. Includes a control unit that controls the delay circuits to sequentially supply power to
The vehicle power stabilization device,
It is configured by grouping a plurality of channels corresponding to one of the DC/DC converters;
The automatic switching circuit is provided in one channel among the grouped channels, and the DC/DC converter is provided in the remaining channel, so that the automatic switching circuit and the DC/DC converter are connected in parallel with each other; and
A power stabilization device for a vehicle, characterized in that the remaining channels are branched by the DC/DC converter, and the delay circuit and the connector are provided in each of the remaining channels.
In claim 1,
The DC/DC converter is provided as a buck-boost converter,
first to fourth switches provided between the battery and the delay circuit;
an inductor provided between the second and third switches and charging and discharging power supplied from the battery by switching operations of the first to fourth switches;
a sensing resistor that senses the voltage across the inductor according to the switching operations of the second and third switches; and
Receives control from the control unit and controls the first to fourth switches to selectively switch according to the input voltage of the power supplied from the battery, and compares the voltage detected from the sensing resistor with a reference voltage to select a buck mode, A power stabilizing device for a vehicle, comprising a buck-boost controller that selectively controls the first to fourth switches to operate in boost mode and buck-boost mode.
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