KR102507618B1 - Power operating apparatus of subminiature electric vehicle - Google Patents

Abstract

A power driving device for a micro electric vehicle is disclosed. A power driving device for a micro electric vehicle of the present invention includes an inverter that converts DC power supplied from a high voltage battery into AC power for driving a motor; a first power module controlling power supply from the high voltage battery to the inverter; a DC-DC converter that converts DC power supplied from the high-voltage battery into DC power for operating electrical components; a second power module controlling power supply from the high voltage battery to the DC-DC converter; and supplying DC power to the inverter through the first power module, converting DC power supplied from the high voltage battery into AC power for driving a motor by controlling the inverter, and converting the DC power through the second power module. -Including a CPU for supplying DC power to a DC converter, including an inverter PCB on which the inverter is mounted, a power module PCB on which the first power module and the second power module are mounted, and a DC-DC converter on which the DC-DC converter is mounted The DC converter PCB and the CPU PCB on which the CPU is mounted are characterized in that they are built into one case.

Description

Power driving device for micro electric vehicle {POWER OPERATING APPARATUS OF SUBMINIATURE ELECTRIC VEHICLE}

The present invention relates to a power driving device for a micro-electric vehicle, and more particularly, to a micro-electric vehicle minimizing heat generated by driving a motor by integrating an inverter and a converter for driving a motor of a micro-electric vehicle into a single water-cooled module. It relates to a power drive device for use.

The needs of various consumers in various aspects such as society, policy, and environment, both domestically and globally, such as air pollution caused by internal combustion engine emissions and traffic congestion, or the need for a 24-hour logistics system according to the uncontact consumption culture The transition to eco-friendly vehicles is rapidly progressing due to means of transportation and the like. In addition, demand for micro electric vehicles is increasing in various types of leisure vehicles in addition to the electrification of passenger transportation means and logistics vehicles in and out of the city center.

A micro electric vehicle has a motor control unit employing an air-cooled motor control inverter and a DC-DC converter.

However, in a conventional motor control unit, a high voltage MOSFET is disposed in the center of a Printed Circuit Board (PCB) for heat dissipation, and a heat sink is disposed thereon. In the case of an external connection line, since it is mostly made through soldering rather than a connector method, it is very likely to be detached when applied to a vehicle with a lot of movement. In addition, since the power consumption for driving is not limited, the maximum current value is continuously supplied during driving modes such as heavy or inclined roads, and quality problems due to burnout due to overheating or overload of the battery frequently occur.

The background art of the present invention is disclosed in Korean Patent Publication No. 10-2000-0025249 (May 6, 2000) entitled 'Apparatus and Method for Controlling Electric Vehicle Power'.

The present invention has been devised to improve the above problems, and an object according to one aspect of the present invention is to integrate an inverter and a converter for driving a motor of a micro electric vehicle into one module of a water cooling structure to reduce heat generated by driving a motor. It is to provide a power driving device for a miniaturized micro electric vehicle.

A power driving device for a micro electric vehicle according to an aspect of the present invention includes an inverter that converts DC power supplied from a high voltage battery into AC power for driving a motor; a first power module controlling power supply from the high voltage battery to the inverter; a DC-DC converter that converts DC power supplied from the high-voltage battery into DC power for operating electrical components; a second power module controlling power supply from the high voltage battery to the DC-DC converter; and supplying DC power to the inverter through the first power module, converting DC power supplied from the high voltage battery into AC power for driving a motor by controlling the inverter, and converting the DC power through the second power module. -Including a CPU for supplying DC power to a DC converter, including an inverter PCB on which the inverter is mounted, a power module PCB on which the first power module and the second power module are mounted, and a DC-DC converter on which the DC-DC converter is mounted The DC converter PCB and the CPU PCB on which the CPU is mounted are characterized in that they are built into one case.

The inverter PCB, the power module PCB, and the CPU PCB of the present invention are sequentially stacked from the bottom.

The present invention includes a temperature sensor for sensing the temperature inside the case; and a cooling unit that lowers the temperature inside the case, wherein the CPU controls the cooling unit according to the temperature sensed by the temperature sensor.

The CPU of the present invention is characterized in that if the temperature sensed by the temperature sensor is higher than a predetermined set temperature, the cooling unit is controlled to lower the temperature inside the case.

The cooling unit of the present invention includes a cooling pipe forming a flow path of cooling water; a cooling water pump forcibly circulating cooling water through the cooling pipe; a radiator that heat-exchanges the cooling water supplied through the cooling pipe; and a cooling plate installed inside the case and cooled by the cooling water supplied from the cooling pipe to lower the internal temperature of the case.

The inverter PCB and the DC-DC converter PCB of the present invention are characterized in that they are installed on the cooling plate.

A power driving device for a micro electric vehicle according to an aspect of the present invention integrates an inverter and a converter for driving a motor of a micro electric vehicle into one water-cooled module to minimize heat generated by driving the motor.

A power driving device for a micro electric vehicle according to another aspect of the present invention improves system stability by integrating an inverter and a converter for driving a motor into one module, and reduces losses in the process of inputting high voltage and high current power and converting motor power thereto. Minimize and increase efficiency.

1 is a block diagram of a power driving device for a micro electric vehicle according to an embodiment of the present invention.
2 is an exemplary modularization diagram of a power driving device for a micro electric vehicle according to an embodiment of the present invention.
3 is a configuration diagram of a cooling unit according to an embodiment of the present invention.

Hereinafter, a power driving device for a micro electric vehicle according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this process, the thickness of lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of a user or operator. Therefore, definitions of these terms will have to be made based on the content throughout this specification.

1 is a block configuration diagram of a power driving device for a micro electric vehicle according to an embodiment of the present invention, FIG. 2 is a modularized diagram of a power driving device for a micro electric vehicle according to an embodiment of the present invention, and FIG. is a configuration diagram of a cooling unit according to an embodiment of the present invention.

Referring to FIG. 1 , a power driving device for a micro electric vehicle according to an embodiment of the present invention includes an inverter 20, a first power module 30, a DC-DC converter 40, and a second power module 60. , a temperature sensor 70, a cooling unit 80, and a central processing unit (CPU) 90.

The inverter 20 converts DC power supplied from the high voltage battery 10 into AC power for driving the motor and inputs the converted AC power to the motor M.

The inverter 20 may include a DC link capacitor and a plurality of switching elements, and each switching element is switched according to a control signal of the CPU 90, so that the DC power of the high voltage battery 10 is AC power for driving the motor. will be converted to

Since the circuit configuration and operation method of the inverter 20 are obvious to those skilled in the art, detailed descriptions thereof are omitted here.

The first power module 30 is connected to the inverter 20 to control power supply from the high voltage battery 10 to the inverter 20 . That is, the first power module 30 controls DC power supplied from the high voltage battery 10 to the inverter 20 according to the control signal of the CPU 90 .

A switching mode power supply (SMPS) may be employed as the first power module 30 . SMPS is a modular power supply that converts input power to suit various electrical devices, and since it is obvious to those skilled in the art, detailed description thereof will be omitted here.

The DC-DC converter 40 converts the DC power of the high voltage battery 10 into DC power necessary for the operation of the electric component 50 and supplies it to each electric component 50 . The DC-DC converter 40 may include a rectifier with multiple diodes.

Since the circuit configuration and operation method of the DC-DC converter 40 are obvious to those skilled in the art, a detailed description thereof is omitted here.

The first power module 30 is connected to the DC-DC converter 40 to control power supply from the high voltage battery 10 to the DC-DC converter 40 . That is, the first power module 30 controls DC power supplied from the high voltage battery 10 to the DC-DC converter 40 according to the control signal of the CPU 90 .

As the second power module 60, a switching mode power supply (SMPS) may be employed.

Meanwhile, in this embodiment, the first power module 30 and the second power module 60 are separately provided as an example, but the technical scope of the present invention is not limited thereto, and the first power module 30 ) and the second power module 60 may be manufactured as one power module.

The electric component 50 operates with DC power supplied from the DC-DC converter 40 . As the electric component 50, all various components or devices inside the micro electric vehicle may be included. As the electric component 50, a cluster of a micro electric vehicle, an audio device, and the like may be employed, and are not particularly limited.

Meanwhile, the CPU 90 , the inverter 20 , the first power module 30 , the DC-DC converter 40 , and the second power module 60 may be installed inside one case 100 .

Each of the CPU 90, the inverter 20, the first power module 30, the DC-DC converter 40, and the second power module 60 may be mounted on a separate printed circuit board (PCB).

For example, the CPU 90 is mounted on the CPU PCB 110, the inverter 20 is mounted on the inverter PCB 130, and the DC-DC converter 40 is mounted on the DC-DC converter PCB 140. The first power module 30 and the second power module 60 may be mounted on the power module PCB 120.

The CPU PCB 110, the inverter PCB 130, and the power module PCB 120 may be stacked on each other.

Referring to FIG. 2 , an inverter PCB 130 is mounted on the cooling plate 84 from below. The cooling plate 84 will be described later.

A plurality of busbars 150 are installed on the inverter PCB 130, and the power module PCB 120 is mounted on top of the busbars 150.

The bus bar 150 is a copper plate, and supports the power module PCB 120 and allows power to be transmitted between the power module PCB 120 and the inverter PCB 130.

A CPU PCB 110 is mounted on the power module PCB 120 .

A plurality of busbars 150 are installed on the power module PCB 120, and the CPU PCB 110 is stacked on top of the busbars 150.

The bus bar 150 is a copper plate, and supports the CPU PCB 110 and allows power to be transmitted between the power module PCB 120 and the CPU PCB 110.

As such, the DC-DC converter 40, the CPU PCB 110, the inverter PCB 130, and the power module PCB 120 are installed inside one case 100, and the CPU PCB 110 and the inverter PCB 130 and the power module PCB 120 are laminated together, which is more advantageous for power and communication management and cooling.

Meanwhile, the DC-DC converter PCB 140 is installed on the cooling plate 84.

In this way, the DC-DC converter PCB 140 and the inverter PCB 130 are installed on the cooling plate 84 so that temperatures can be controlled to be relatively low.

The temperature sensor 70 senses the temperature inside the case 100 and transfers the detected temperature to the CPU 90 . For example, the temperature sensor 70 may be installed on the power module PCB 120, but is not limited thereto.

As described above, when the DC-DC converter PCB 140, the CPU PCB 110, the inverter PCB 130, and the power module PCB 120 are installed inside one case 100, the case 100 The temperature inside can increase significantly. This temperature increase may cause the micro electric vehicle to operate abnormally, such as causing the motor to stop operating.

Accordingly, the temperature sensor 70 detects the temperature inside the case 100 and inputs the temperature to the CPU 90 so that the CPU 90 can control the temperature inside the case 100 .

The cooling unit 80 supplies cooling water to the inside of the case 100 according to a control signal from the CPU 90 to lower the temperature inside the case 100 .

Referring to FIGS. 2 and 3 , the cooling unit 80 includes a cooling water pump 81 , a radiator 82 , a cooling section, and a cooling plate 84 .

The cooling pipe 83 forms a flow path for circulation of cooling water therein.

The cooling water pump 81 circulates the cooling water in the cooling pipe 83 so that the cooling water is supplied to the inside of the case 100 . The cooling water discharged from the cooling water pump 81 is supplied to the radiator 82 through the cooling pipe 83 .

The radiator 82 cools the cooling water by exchanging heat with the cooling water supplied from the cooling water pump 81 through the cooling pipe. The cooling water discharged from the radiator 82 is supplied to the inside of the case 100 through the cooling pipe 83 .

The cooling plate 84 is installed inside the case 100, and an inverter PCB 130 and a DC-DC converter PCB 140 are installed on top of the cooling plate 84. A cooling tube 83 is installed inside the cooling plate 84 . The cooling plate 84 is cooled by circulating the cooling water through the cooling pipe 83 inside the case 100, and the temperature inside the case 100 is lowered while the cooling plate 84 is cooled, thereby reducing the DC-DC converter. The temperature of each of the PCB 140, the CPU PCB 110, the inverter PCB 130, and the power module PCB 120 is directly or indirectly lowered.

That is, the cooling water supplied to the radiator 82 by the cooling water pump 81 is heat-exchanged and supplied to the cooling plate 84 inside the case 100, and the cooling plate 84 is cooled by the cooling water to cool the case 100. By absorbing internal heat, an increase in temperature inside the case 100 can be prevented.

The CPU 90 controls the first power module 30 to supply DC power from the high voltage battery 10 to the inverter 20. At this time, the CPU 90 controls the inverter 20 to convert the DC power to AC power required for motor operation. convert to Accordingly, the motor M is operated to drive the micro electric vehicle.

In addition, the CPU 90 controls the second power module 60 to supply DC power from the high voltage battery 10 to the DC-DC converter 40 . Accordingly, the DC-DC converter 40 converts into DC power necessary for the operation of the electric component 50 of the micro electric vehicle. Accordingly, each electrical component 50 operates using the corresponding DC power supply.

In addition, the CPU 90 detects the temperature inside the case 100 through the temperature sensor 70, and determines whether the detected temperature is equal to or higher than a predetermined set temperature.

The set temperature is such that at least one of the DC-DC converter 40, the CPU 90, the inverter 20, the first power module 30, and the second power module 60 in the case 100 operates abnormally. It is the temperature inside the case 100 that is determined to be possible. The set temperature is set in advance, and may be variously set according to the size of the case 100 and the operating time of the micro electric vehicle.

On the other hand, as a result of determining whether the temperature sensed by the temperature sensor 70 is equal to or higher than the set temperature, if the temperature inside the case 100 is equal to or higher than the set temperature, the CPU 90 controls the cooling unit 80 to cool the case 100. lower the internal temperature.

In this case, the cooling water pump 81 supplies cooling water to the radiator 82, and the radiator 82 lowers the temperature of the cooling water by exchanging heat with the cooling water supplied from the cooling water pump 81.

The cooling water heat-exchanged by the radiator 82 is supplied to the cooling plate 84 inside the case 100, and the cooling plate 84 is cooled by the cooling water and absorbs heat inside the case 100, so that the case 100 ) the internal temperature is lowered.

As described above, the power driving device for a micro electric vehicle according to an embodiment of the present invention integrates an inverter 20 and a DC-CD converter 40 for driving a motor of a micro electric vehicle into one water-cooled structure module to drive a motor Minimize heat generated by operation.

In addition, the power driving device for a micro electric vehicle according to an embodiment of the present invention integrates an inverter 20 for driving a motor and a DC-DC converter 40 into one module to improve system stability, and to provide high voltage and high current. Minimizes losses and increases efficiency in the process of power input and conversion of motor power.

Implementations described herein may be embodied in, for example, a method or process, an apparatus, a software program, a data stream, or a signal. Even if discussed only in the context of a single form of implementation (eg, discussed only as a method), the implementation of features discussed may also be implemented in other forms (eg, an apparatus or program). The device may be implemented in suitable hardware, software and firmware. The method may be implemented in an apparatus such as a processor, which is generally referred to as a processing device including, for example, a computer, microprocessor, integrated circuit or programmable logic device or the like. Processors also include communication devices such as computers, cell phones, personal digital assistants ("PDAs") and other devices that facilitate communication of information between end-users.

Although the present invention has been described with reference to the embodiments shown in the drawings, it should be noted that this is only exemplary and various modifications and equivalent other embodiments are possible from those skilled in the art to which the technology pertains. will understand Therefore, the true technical protection scope of the present invention will be defined by the claims below.

10: high voltage battery 20: inverter
30: first power module 40: DC-DC converter
50: electric component 60: second power module
70: temperature sensor 80: cooling unit
81: coolant pump 82: radiator
83: cooling pipe 84: cooling plate
90: CPU 100: Case
110: CPU PCB 120: Power module PCB
130: inverter PCB 140: DC-DC converter PCB

Claims (6)

an inverter that converts DC power supplied from the high-voltage battery into AC power for driving the motor;
a first power module controlling power supply from the high voltage battery to the inverter;
a DC-DC converter that converts DC power supplied from the high-voltage battery into DC power for operating electrical components;
a second power module controlling power supply from the high voltage battery to the DC-DC converter; and
DC power is supplied to the inverter through the first power module, DC power supplied from the high voltage battery is converted into AC power for driving a motor by controlling the inverter, and the DC- Including a CPU that supplies direct current power to the DC converter,
An inverter PCB with the inverter, a power module PCB with the first power module and the second power module, a DC-DC converter PCB with the DC-DC converter, and a CPU PCB with the CPU are one. is built inside the case of
The cooling unit includes a cooling pipe forming a flow path of cooling water; a cooling water pump forcibly circulating cooling water through the cooling pipe; a radiator that heat-exchanges the cooling water supplied through the cooling pipe; and a cooling plate installed inside the case and cooled by the cooling water supplied from the cooling pipe to lower the internal temperature of the case.
The cooling pipe is installed inside the cooling plate,
The inverter PCB and the DC-DC converter PCB are installed on top of the cooling plate,
A plurality of busbars are installed between the inverter PCB and the power module PCB, and a plurality of busbars are installed between the power module PCB and the CPU PCB, so that the inverter PCB, the power module PCB, and the CPU PCB are stacked apart from each other A power driving device for a micro electric vehicle, characterized in that. delete According to claim 1,
a temperature sensor to sense the temperature inside the case; and
Further comprising a cooling unit for lowering the temperature inside the case,
The power driving device for a micro electric vehicle, characterized in that the CPU controls the cooling unit according to the temperature sensed by the temperature sensor. 4. The method of claim 3, wherein the CPU
When the temperature sensed by the temperature sensor is equal to or higher than a predetermined set temperature, the cooling unit is controlled to lower the internal temperature of the case. delete delete

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