KR101104781B1 - one direction regenerative braking control method of electric vehicle with non contact electromagnetic inductive charging - Google Patents

Abstract

The present invention secures the energy efficiency and safety of the system by regenerating the regenerative braking energy from the drive motor of the electric vehicle having a non-contact magnetic induction charging method first by storing the regenerative braking energy in the energy storage unit and then charging the battery with an appropriate control signal. The present invention relates to a unidirectional regenerative braking control method for an electric vehicle, which receives and collects an AC current supplied in the form of a magnetic field from a feeder line, and converts the collected AC current into a DC current to convert magnetic induction energy for driving a driving motor. Generating, receiving the required power of the driving motor from the MCU, supplying the generated magnetic induction energy to the driving motor, and comparing the supplied magnetic induction energy with the required power energy of the driving motor; As a result of the comparison, the magnetic induction energy required power for driving the driving motor Checking the SOC of the battery under the control of the MCU when the energy is smaller than the energy, and discharging the battery; and when the surplus energy is generated from the self-induced energy, storing the surplus energy in the energy storage unit under the control of the MCU; Checking the state of charge (SOC) of the battery under the control of the step of charging the surplus energy stored in the energy storage to the battery.

Electric vehicle, regenerative braking, unidirectional, battery

Description

One-way regenerative braking control method of electric vehicle with non contact electromagnetic inductive charging}

The present invention relates to a regenerative braking control method for an electric vehicle, and more particularly, to a one-way regenerative braking control method for controlling regenerative braking in one direction through a regulator and a battery in an electric vehicle having a non-contact magnetic induction charging method.

As the economy develops, the demand for automobiles is exploding. As the demand for automobiles increases, the exhaust gas emitted from automobiles becomes a major cause of environmental pollution.

Therefore, various studies to reduce the emission of automobiles are continuously progressed, and the development of automobiles that can reduce the emission of gas in the industry is in progress. As a result of these studies and developments, commercialization of electric vehicles that do not generate emissions is partially attempted.

An electric vehicle means a vehicle that operates by using electricity as a power source, and a vehicle that is equipped with a battery that can be charged as a power source in the vehicle itself, and runs by using electric power supplied from the mounted battery.

The configuration of the electric vehicle is composed of a driving motor for driving the vehicle driven largely by electricity, and a battery for supplying electricity to the driving motor, together with the basic functional parts of a vehicle having the same components as a general vehicle. .

However, the battery of the electric vehicle takes a long time to charge, and also the driving distance on a single charge is very limited. Therefore, since the electric vehicle must be frequently charged to secure the desired moving distance, the installation of the charging station and the charging system to solve these problems in the operation of the electric vehicle is a very important technical field.

Currently, the charging system of an electric vehicle uses a plug-in charging method in which a wire connected to a commercial power source is directly connected to an electric vehicle for charging. In the plug-in charging method, the charging method can be charged only at a designated place, a long time is required for charging, and charging is impossible while driving.

In addition, the charging of the electric vehicle using the plug-in charging method takes about 1 to 8 hours, and this long charging time limits the operation of the vehicle, and to protect the vehicle from the external environment for a long charging time. Since it has to be managed, there are many restrictions and inconveniences associated with charging.

Therefore, in order to commercialize an electric vehicle, a charging system suitable for this problem must be constructed. That is, the problem of charging time, external environmental influences and hassles in charging using a cable, space problems occupied by the vehicle during charging time, charging efficiency, etc. should be solved.

Accordingly, the present invention has been made to solve the above problems, the regenerative braking energy from the drive motor of the electric vehicle having a non-contact magnetic induction charging method first stores the regenerative braking energy in the energy storage unit and then provides an appropriate control signal. The purpose of the present invention is to provide a one-way regenerative braking control method that can secure the energy efficiency and safety of the system by charging with a battery.

 Another object of the present invention is to control the energy stored in the battery in both the regulator and regenerative braking in the electric vehicle having a non-contact magnetic induction charging method to be stored in one energy storage unit to overcharge current (overcharge current) flowing into the battery The present invention is to provide a one-way regenerative braking control method that can solve the energy efficiency and safety of the system.

Another object of the present invention is to provide an electric vehicle having a non-contact magnetic induction charging method by using the characteristic that the energy generated in both directions of the regulator and the regenerative braking side integrated into a single energy storage unit to provide a battery life of the battery In addition, to provide a one-way regenerative braking control method that can increase the energy efficiency.

A characteristic of the unidirectional regenerative braking control method of an electric vehicle having a non-contact magnetic induction charging method according to the present invention for achieving the above object is (A) to receive and collect the AC current supplied in the form of a magnetic field from the feed line, Converting the collected AC current into a DC current to generate magnetic induction energy for driving the driving motor; and (B) receiving the required power of the driving motor from the MCU and supplying the generated magnetic induction energy to the driving motor. And (C) comparing the supplied magnetic induction energy with the required power energy of the driving motor, and (D) controlling the MCU when the magnetic induction energy is smaller than the required power energy for driving the driving motor. Checking the state of charge (SOC) of the battery to discharge the battery; and (E) when surplus energy is generated from the self-induced energy, Storing the surplus energy in an energy storage unit under control, and (F) checking a state of charge (SOC) of the battery under control of an MCU to charge surplus energy stored in the energy storage unit with a battery. have.

Preferably, the step (D) includes checking the power discharged from the battery in real time and generating a control signal according to the battery discharge stop from the MCU to cut off the driving motor power when the battery discharge current is 10C or more. It is done.

Preferably, the step (E) is characterized in that it is determined that the surplus energy is generated when the required power for driving the drive motor is not requested or when the magnetic induction energy is larger than the required power energy for driving the drive motor. It is done.

Preferably, the step (E) comprises: searching for an available storage capacity of the energy storage unit; removing the surplus energy if there is no available storage capacity in the search result; And storing the surplus energy in the energy storage unit by inputting a control signal of the MCU when there is an available storage capacity in the storage unit.

Preferably, the step (F) is characterized in that the battery is charged with the surplus energy stored in the energy storage only in the case of not overcharging the battery by checking the power charged from the battery in real time.

Preferably, the step (F) is characterized in that the surplus energy charged by the battery is charged using CV (fixed voltage) charging or CP (fixed power) charging according to the battery pack voltage.

Preferably, the step (F) includes checking the power charged from the battery in real time to generate a control signal according to the stop of the battery charging from the MCU to cut off the battery power when the battery is overcharging. It is done.

As described above, the unidirectional regenerative braking control method for an electric vehicle having a non-contact magnetic induction charging method according to the present invention has the following effects.

First, the regenerative braking energy is not directly introduced into the battery. Instead, the regenerative braking energy is first stored in a separate energy storage unit and then charged with the battery through an appropriate control signal, thereby reducing the number of charges of the battery and excessive current generated through the motor. Can prevent the battery from flowing into the battery, which can increase the battery life and ensure the safety of the system.

Second, the regenerative braking energy and regulator energy generated are stored in a separate energy storage unit instead of being directly introduced into the battery, thereby reducing energy discarded even when the battery is already fully charged, thereby increasing energy efficiency.

Third, in the case of an electric vehicle having a non-contact magnetic induction charging method, the energy from the motor and the battery is integrated and controlled through a single energy storage unit in both the regulator and the regenerative braking side to increase the life of the battery and increase the energy efficiency. You can.

Fourth, unlike the conventional power distribution system, it is possible to secure the energy efficiency and safety of the system by efficiently controlling the power going out of the drive motor and the battery charge through the regulator, BMS, MCU communication.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments with reference to the accompanying drawings.

A preferred embodiment of the unidirectional regenerative braking control method for an electric vehicle having a non-contact magnetic induction charging method according to the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, only the embodiments to complete the disclosure of the present invention and complete the scope of the invention to those skilled in the art. It is provided to inform you. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical idea of the present invention, various equivalents that may be substituted for them at the time of the present application It should be understood that there may be water and variations.

1 is a block diagram showing the structure of a unidirectional regenerative braking control system of an electric vehicle having a non-contact magnetic induction charging method according to an embodiment of the present invention.

As illustrated in FIG. 1, the unidirectional regenerative braking control system includes a driving motor 100, a regenerative braking processor 200, a battery processor 300, a magnetic induction processor 400, and a MCU (Motor Controller Unit) 500. It consists of.

The battery processor 300 includes a battery 310 for storing energy, charges energy input from the outside, and discharges charged energy as needed to supply power to drive the driving motor 100. .

The non-contact magnetic induction processing unit 400 drives the drive motor 100 by using the energy supplied by collecting the non-contact method through a magnetic field from the feed line 600, the surplus remaining after driving the drive motor 100 The energy is output to the regenerative braking processor 200.

The regenerative braking processor 200 stores the regenerative braking energy from the driving motor 100 and the surplus energy output from the non-contact magnetic induction processor 400, and stores the regenerative braking energy based on the state of charge of the battery. The battery 310 is charged by supplying the battery 310 in the battery processor 300.

The MCU 500 outputs a driving signal of the driving motor 100 through a control signal of the driving motor 100 input from the non-contact magnetic induction processor 400 or the battery processor 300.

The driving motor 100 is driven by a power supplied from at least one of the non-contact magnetic induction processing unit 400 and the battery processing unit 300 by using the driving signal output from the MCU 500.

Each component of the unidirectional regenerative braking control system for an electric vehicle having a non-contact magnetic induction charging method according to the present invention configured as described above will be described in more detail as follows.

First, the non-contact magnetic induction processor 400 includes a current collector module 410, a regulator 420, and a regulator controller 430. At this time, the current collector module 410 receives the AC current supplied in the form of a magnetic field from the power supply line 600 to collect current to receive the energy required to drive the drive motor 100. In addition, the regulator 420 converts the AC current collected by the current collector module 410 into a DC current and supplies it to the driving motor 100 and the regenerative braking processor 200. At this time, the regulator controller 430 controls the supply of the current converted by the regulator 420 under the control of the MCU 500 according to the driving state of the driving motor 100 or the energy storage state of the regenerative braking processor 100. To control.

Next, the regenerative braking processor 200 includes a DC-DC converter 210, an energy storage unit 220, and a regeneration controller 230. In this case, the DC-DC converter 210 boosts and outputs the energy regenerated from the driving motor 100, and the energy storage unit 220 boosts and outputs the regenerative braking energy boosted by the DC-DC converter 210. At least one of the surplus energy supplied from the magnetic induction processing unit 400 is stored. The regeneration controller 230 controls the energy stored in the energy storage 220 to be supplied to the battery processor 300 under the control of the MCU 500 according to the charging state of the battery 310.

Subsequently, the battery processor 300 includes a battery 310 and a battery management system (BMS) 320. At this time, the battery 310 charges the energy input from the regenerative braking processor 200, discharges the charged energy and supplies it to the driving motor 100 as a power source for driving. In addition, the BMS 320 communicates with the regeneration controller 230 under the control of the MCU 500 so that the energy supplied from the energy storage unit 220 is supplied to the battery 310 so as to be appropriately supplied to the battery 310. Charges the battery 310 and checks a state of charge (SOC) of the battery 310 to control a battery charge / discharge operation.

For reference, in the conventional regenerative braking technique, a system in which regenerative braking energy is directly introduced into a battery has been used, and a system in which the regenerative braking system is charged with the battery 310 by using a power source other than regenerative braking is a system that has not been conventionally used.

Therefore, by controlling the energy coming directly from the drive motor 100 to the battery processing unit 300 through the regenerative braking processor 200, the overcharge current coming into the battery 310 to solve the safety of the system In addition, the surplus energy discarded by the regenerative braking processor 200 and the magnetic induction processor 400 may be integrated into and stored in one energy storage unit 220 to be efficiently secured.

The operation of the unidirectional regenerative braking control system for an electric vehicle having a non-contact magnetic induction charging method according to the present invention configured as described above will be described in detail with reference to the accompanying drawings. The same reference numerals as in FIG. 1 refer to the same members performing the same function.

2 is a flowchart illustrating a unidirectional regenerative braking control method of an electric vehicle having a non-contact magnetic induction charging method according to an embodiment of the present invention.

Referring to FIG. 2, first, when power is supplied to the feed line 600 (S10), the current collector module 410 in the non-contact magnetic induction processor 400 is supplied in the form of a magnetic field from the feed line 600. It collects AC current and collects current. Then, the regulator 420 converts the AC current collected by the current collector module 410 into a DC current to generate energy for driving the driving motor 100 (S20).

Then, the regulator controller 430 in the non-contact magnetic induction processing unit 400 receives the required power of the driving motor 100 from the MCU 500 and drives the magnetic induction energy collected by the magnetic induction processing unit 400 to the driving motor 100. Supply to (S30).

In this case, the regulator controller 430 determines whether the required power for driving the driving motor 100 is requested from the MCU 500 (first determination) (S40), and when the required power is requested, the magnetic induction The magnetic induction energy supplied from the processing unit 400 and the required power energy of the driving motor are compared with each other (first comparison) (S50).

In the first comparison result S50, when the magnetic induction energy supplied from the magnetic induction processing unit 400 is less than the required power energy for driving the driving motor 100, the battery processing unit is insufficient. The BMS 320 in the 300 discharges the battery 310 by checking the state of charge (SOC) of the battery 310 under the control of the MCU 500 (S60).

At this time, the BMS 320 checks the power discharged from the battery 310 in real time, and when the battery discharge current is 10C or more (S70), the BMS 320 transmits a request signal to the MCU 500 to stop the battery discharge. Then, the MCU 500 stops the driving motor 100 to stop the discharge of the battery 310 (S80). At this time, the 10C is a value representing the maximum discharge rate that the battery discharge current can supply, and is the maximum discharge rate of the battery currently being used.

On the other hand, when the surplus energy is generated from the magnetic induction energy supplied from the magnetic induction processing unit 400, it is determined whether the generated surplus energy is stored in the energy storage unit 220 (second determination) (S150). In this case, whether the surplus energy is generated is not required power for driving the driving motor 100 in the first determination result (S40) or the first comparison result (S50) in the magnetic induction processing unit 400. When the supplied magnetic induction energy is larger than the required power energy for driving the driving motor 100, it is determined that surplus energy is generated. In addition, the determination of whether the surplus energy is stored (second determination) is determined based on the available storage capacity of the energy storage unit 220 retrieved through the regeneration controller 230.

When there is no available storage capacity in the second storage result S150, the energy storage unit 220 removes the generated surplus energy (S180), and when there is an available storage capacity in the energy storage unit 220. The surplus energy is stored in the energy storage unit 220 as a control signal of the MCU 500 through the regeneration controller 230 (S160).

Thereafter, the BMS 320 checks the power charged from the battery 310 in real time and checks whether the battery is overcharging (S170), and the BMS 320 is the MCU 500 only when the battery is not overcharging. In accordance with the control of the) check the state of charge (SOC) of the battery 310 to charge the surplus energy stored in the energy storage unit 220 to the battery 310 (S90).

At this time, the energy charged by the battery 310 is different in the charging method according to the battery pack (pack) voltage (S100), if the battery pack is larger than the fixed voltage using CV (fixed voltage) charging ( S110), when the battery pack is smaller than the fixed voltage, the battery is charged using CP (fixed power) charging (S120). For reference, the fixed voltage is generally one of methods for charging a battery, and refers to a voltage supplied with a predetermined size designated for charging the battery.

In addition, the BMS 320 checks the power charged by the battery 310 in real time and transmits a request signal to the MCU 500 to stop the battery charging when the battery is overcharged (S130). Then, the MCU 500 stops charging the battery 310 by stopping the power of the battery 310 (S140).

As such, the present invention provides the power to the regenerative braking processor 200, the magnetic induction processor 400, and the battery processor 300 to the drive motor 100 through the communication with the MCU 500 and the battery is charged with the battery. It can be controlled efficiently. In the related art, the driving power distribution control is composed of only a circuit, and in the case of an overcurrent, the system is formed by cutting a current in a fuse or a power distribution unit (PDU). Therefore, when a current is cut off from a conventional fuse or PDU on a circuit, a sudden electric shock may cause a breakdown of components, and there is a problem because it is directly connected to the safety of an automobile. The energy efficiency and safety of the electric vehicle system are secured.

Although the technical spirit of the present invention described above has been described in detail in a preferred embodiment, it should be noted that the above-described embodiment is for the purpose of description and not of limitation. In addition, those skilled in the art will understand that various embodiments are possible within the scope of the technical idea of the present invention. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

1 is a block diagram showing the structure of a unidirectional regenerative braking control system for an electric vehicle having a non-contact magnetic induction charging method according to an embodiment of the present invention.

2 is a flowchart illustrating a unidirectional regenerative braking control method of an electric vehicle having a non-contact magnetic induction charging method according to an embodiment of the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

100: drive motor 200: regenerative braking processing unit

210: DC-DC converter 220: energy storage unit

230: playback controller 300: battery processor

310: Battery 320: BMS

400: magnetic induction processing unit 410: current collector module

420: regulator 430: regulator controller

500: MCU 600: Feed Line

Claims (7)

(A) receiving and collecting AC current supplied from a feed line in the form of a magnetic field, and converting the collected AC current into a DC current to generate magnetic induction energy for driving a drive motor; (B) receiving the required power of the driving motor from the MCU and supplying the generated magnetic induction energy to the driving motor, (C) comparing the supplied magnetic induction energy with the required power energy of the driving motor; (D) discharging the battery by checking the state of charge (SOC) of the battery under the control of the MCU when the magnetic induction energy is less than the required power energy for driving the driving motor; (E) When the required power for driving the drive motor is not requested or when the magnetic induction energy is larger than the required power energy for driving the driving motor, it is determined that surplus energy is generated, and the surplus energy is surplus in the magnetic induction energy. Storing the surplus energy in an energy storage unit under control of the MCU when energy is generated; (F) checking the state of charge (SOC) of the battery under the control of the MCU to charge the surplus energy stored in the energy storage with the battery, characterized in that it comprises a step. The method of claim 1, wherein step (D) Checking the power discharged from the battery in real time, if the battery discharge current is more than 10C, generating a control signal according to the battery discharge stop from the MCU to cut off the drive motor power, characterized in that it comprises a one-way regenerative braking of the electric vehicle Control method. delete The method of claim 1, wherein step (E) Searching whether the energy storage unit has available storage capacity; Removing the surplus energy when there is no available storage capacity in the energy storage result; The search result, the one-way regenerative braking control method for an electric vehicle comprising the step of storing the surplus energy in the energy storage unit by inputting a control signal of the MCU when there is available storage capacity in the energy storage unit. The method of claim 1, wherein (F) A method of controlling one-way regenerative braking of an electric vehicle, wherein the battery is charged with surplus energy stored in the energy storage unit only when the battery is not overcharging by checking the state of charge (SOC) of the battery in real time. delete The method of claim 1, wherein (F) When the battery is overcharging by checking the state of charge (SOC) of the battery in real time, generating a control signal according to the battery charging stop from the MCU to cut off the battery power of the electric vehicle, characterized in that One-way regenerative braking control method.

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