WO2023033556A1

WO2023033556A1 - System for extending mileage of electric vehicle by using attachable/detachable auxiliary battery

Info

Publication number: WO2023033556A1
Application number: PCT/KR2022/013079
Authority: WO
Inventors: 이진국
Original assignee: 이진국
Priority date: 2021-09-06
Filing date: 2022-09-01
Publication date: 2023-03-09
Also published as: KR20230036575A

Abstract

The present invention relates to a system for extending the mileage of an electric vehicle by using an attachable/detachable auxiliary battery, the system further providing, in an electric vehicle (1) driven using the power source of a main battery (2), an attachable/detachable auxiliary battery (30) that is mechanically attached/detached in an emergency, wherein the attachable/detachable auxiliary battery (30): is composed of a pack and some modules in which a plurality of cells having a cell capacity that is the same capacity of one cell of the main battery (2) are embedded, and thus is directly connected to the main battery (2) or a driving unit; is connected to a battery management system (BMS(2a)) of the main battery (2) through a temperature sensing device, respective cell management control devices (CMU), and a device (PRA) for controlling temperature and emergency cutoff function, so as to be controlled by means of an electric power control unit (EPCU) (3); and is stored in advance in a fully charged state in a rental office or a roadside service area, and can be mechanically attached/detached within a short time when leased.

Description

Range extension system for electric vehicles using detachable auxiliary battery

The present invention relates to a mileage extension system for an electric vehicle using a detachable auxiliary battery, and more specifically, to a storage unit equipped with a removable auxiliary battery that can be used in case of emergency when the capacity is insufficient in connection with a main battery fixedly provided in an electric vehicle. After fully charging the box in advance at a nearby rental office or roadside rest area, the box is mechanically detached from the guide rail of the storage box provided in the electric vehicle in a short time. It is intended to provide a mileage extension system for electric vehicles using a detachable auxiliary battery so that they can drive on the road.

The response to climate change so far is not enough to slow down the pace of global warming, and strict global environmental regulations are spreading as warnings are spreading that humanity as a whole could be in danger if more drastic greenhouse gas reduction and climate change responses are not made. In the age of extinction of engines by governments around the world due to the imposition of fines for phosphorus carbon emission When using air conditioners, heaters, dashboards, cigar jacks, etc. in the vehicle during rapid acceleration, the mileage becomes shorter, and in particular, at -7℃ below zero, an average of 100kmtr is drastically reduced due to discharge, etc. In order to solve the problem, manufacturers in each country simply increase the battery capacity with details rather than technology without any innovation, so the charging time takes longer and the fuel economy increases only the battery capacity corresponding to the fuel efficiency of oil-powered vehicles, extending the mileage and attracting consumer interest. There are a lot of controversies about the above in one context.

In addition, in the development of electric vehicles, charging-related technology is an important part in market formation, and charging convenience is a very important part in increasing the spread of electric vehicles. It is believed that popularization can be properly achieved only when it is possible to widen the choice by diversifying vehicle types other than small and medium-sized cars and trucks by solving the inconvenience of charging on the way home from work. The success or failure of the early commercialization of electric vehicles will depend on the problem of charging, charging places that do not move electric vehicles quickly after fully charged, and saving charging time, which means that consumers can use them conveniently.

In accordance with the depletion of fossil fuels and the generation of pollutants due to the use of fossil fuels, interest in electric vehicles such as electric bicycles, electric motorcycles, and electric vehicles driven by electricity is increasing. Specifically, an electric vehicle refers to a vehicle driven by using power charged in a battery, which is a built-in energy storage system.

In general, as an energy storage system for an electric vehicle, a main battery capable of charging and discharging is often used.

The main battery of a certain capacity is charged with external power, and the electric vehicle is operated using this as driving power. After the charge capacity of the main battery is exhausted, the electric vehicle can be operated again by recharging the main battery.

However, if there is no charging station nearby or if the main battery fails due to a contact accident and cannot receive power, the electric vehicle cannot be driven, and an emergency situation such as vehicle towing may occur. In addition, a situation in which the electric vehicle cannot be started may occur because the main battery is severely discharged due to long-term parking due to overseas business trips. There is an invention that provides an alternative to such an emergency situation.

Korean Registered Patent (B1) 10-1180801 (2012.09.03) proposes a method for increasing the mileage of an electric motor using an auxiliary battery, which fixes and mounts a main battery and an auxiliary battery together in an electric vehicle, and An energy storage system that can increase the mileage of an electric vehicle by controlling the charge amount of the main battery and auxiliary battery according to the state of charge and health of the vehicle is presented.

Republic of Korea Patent Publication (A) 10-2014-0013250 (2014.02.05.) provides a vehicle power supply device and control method using a multi-battery pack, which is a main battery pack power source and an auxiliary battery pack power source A multi-battery pack capable of responding to the case where an emergency situation occurs in which control of one of the battery packs is impossible due to a switching operation so that only one is selectively transmitted to the vehicle drive system is proposed.

The prior art needs to be carried around all the time and requires a long waiting time for charging while the vehicle is stopped.

Korean Registration Patent Publication (B1) 10-1030615 (2011.01.14.) provides a battery switching device and method, which automatically activates an electric vehicle when the main battery is fully discharged by connecting a fixed auxiliary battery. As a result, a battery switching device that receives driving power from an auxiliary battery was proposed.

The prior art provides configurations including a stationary auxiliary battery that can be used together with a stationary main battery, and the auxiliary battery of a stationary configuration is connected to a battery management system (BMS) mounted in a vehicle to operate. As a result, there is a limitation that the vehicle cannot be driven if the BMS is out of order.

However, the above-described prior art is such that the auxiliary battery or external battery pack is operated in a fixed state in the vehicle, and when the main battery and auxiliary battery or external battery are fully discharged, the problem of long-term charging through a charger remains. .

Accordingly, the inventors of the present invention researched and developed the present invention, focusing on the biggest inconvenient problem of electric vehicles that have to wait for charging for a long time in search of a charging station when the capacity of the main battery that is fixedly installed and used in the electric vehicle is insufficient compared to the driving distance. will be.

That is, in the present invention, when charging is necessary due to consumption of the main battery, but there is no time and it is difficult, a storage box having a detachable auxiliary battery that can quickly extend the mileage is selected as much as the required capacity is mechanically attached to the detachable guide rail of the electric vehicle. It handles a storage box of unified standard so that it can be installed in 3 minutes, and in case of emergency, it is possible to mechanically install a detachable auxiliary battery that is fully charged in advance at a nearby rental office or roadside rest area in a short time, so you can drive without worrying about waiting time for charging. The present invention was completed with a technical problem of providing a system capable of extending the mileage of all electric vehicles using a detachable auxiliary battery capable of extending the mileage.

In addition, according to the present invention, an electric vehicle with insufficient main battery capacity can use a detachable auxiliary battery to extend the mileage and have a lot of time after arriving at the destination home or office, so charging the main battery is 3 to 4 times cheaper than rapid charging and can extend the lifespan. The detachable auxiliary battery in the storage unit is disconnected from the main battery, and returned after checking the remaining capacity at a nearby rental office the next day to increase fuel efficiency as much as the weight of the vehicle body is reduced. The present invention was completed with an object.

In addition, the present invention can provide a detachable auxiliary battery by buying, owning or renting, minimizing the burden on all electric vehicles to use, and reducing the capacity of the main battery of the electric vehicle to be produced and shipped, thereby lowering the selling price. In case of emergency, the installation time of the detachable auxiliary battery is mechanically installed in a short time, similar to the refueling time of a fuel vehicle, within 3 minutes, allowing continuous driving to the destination, thereby accelerating the early popularization of electric vehicles. The present invention was completed with a technical task. .

As a means of solving the problem, in the present invention,

First, a detachable auxiliary battery that is mechanically detachable is installed in an electric vehicle driven by the power of the main battery in case of emergency; The detachable auxiliary battery is composed of a module and a pack in which a plurality of cells are embedded with a unit cell capacity equal to the unit capacity of one cell of the main battery, and is used directly connected to the main battery or to a driving unit. It is connected to the battery manager system (BMS) of the main battery through the cell management control unit (CMU) and the temperature and emergency shutdown control unit (PRA) to be controlled by the integrated power control unit (Electric Power Control Unit, EPCU). ; The detachable auxiliary battery is stored in a fully charged state in advance at a rental office or a roadside rest area, and is characterized in that it can be mechanically detached and coupled when renting.

Second, at the rental station or roadside rest area, a battery remaining amount check means for checking the remaining amount when renting or returning a detachable auxiliary battery; By calculating the driving distance to the destination, it selects and provides a detachable auxiliary battery with the appropriate capacity for the user, pays the rental cost when renting the detachable auxiliary battery, and provides the function of settling the cost according to the remaining amount after use when returning it. It is characterized by having a kiosk.

Third, the detachable auxiliary battery is built into a storage box mounted on an electric vehicle, and the storage box is mechanically coupled to a mounting guide rail installed on the electric vehicle so as to have electrical contact with the integrated power control unit (EPCU). characterized by being connected.

Fourth, the storage box is characterized in that it is configured to be located on the roof or under the back of the rear seat of the vehicle and on the front side of the truck loading box or on the wall.

Fifth, the detachable auxiliary battery is detachable by subdividing the individual selection capacity range into 1 to 3 multiple grades so that the detachable auxiliary battery composed of modules or packs smaller than the rated capacity of the main battery can select the battery capacity suitable for the distance to be extended if necessary. It is characterized in that the auxiliary battery is configured.

Sixth, the detachable auxiliary battery connects two detachable auxiliary batteries mounted on the roof of the vehicle or behind the back of the rear seat into one, and is directly connected to the main battery or driving unit to provide a high-capacity battery in preparation for excessive use of electricity during congestion during cold weather, hot weather, or congestion during holidays. It is characterized by being configured to be able to.

Seventh, by using the detachable auxiliary battery, the mileage is extended in case of emergency, and there is plenty of time after arriving at the destination. characterized by

According to the mileage extension system for an electric vehicle using a detachable auxiliary battery provided by the present invention, even if the electric vehicle is rapidly charged due to the consumption of the main battery while driving, it must wait for charging for more than 20 to 30 minutes, but the detachable auxiliary battery can be charged within 3 minutes. Since it is possible to increase the mileage by replacing it in a short time as a substitute for charging, it is possible to continuously extend the mileage as needed by mechanically and easily attaching and detaching the detachable auxiliary battery at any time in case of emergency.

In addition, since there is no anxiety about charging and driving by using a detachable auxiliary battery for a short time, it is possible to solve the problem of shortening the lifespan of the main battery, which is emerging during rapid charging, by habitually inducing slow charging for a long time after returning home.

In addition, in the present invention, a detachable rental place to rent and use a detachable auxiliary battery in order to provide a low cost for consumers to use is a detachable mechanical device that can be attached and detached when a number of fuel gas stations and rest areas along the road are used, or when you are stuck in the middle of the road can be used by calling a tow truck equipped with, and the detachable auxiliary battery returned to the rental office can be charged using cheap late-night electricity or external solar power generation or wind power generation, etc., thereby reducing the cost of charging. can

In addition, in order to solve the biggest problems of the popularization of electric vehicles, such as the long wait for inconvenient charging waiting time and the unstable driving distance, manufacturers have recently installed high-capacity and expensive main batteries and tried to sell them at a high price by farther driving distance, but the charging time is longer. It can solve the problem of being ignored by consumers because of the inconvenience of charging and the lack of popularity.

In addition, the main battery replacement method has been implemented in some national models since several years ago, but each competitor has a different main battery capacity to charge farther and faster, and the remaining performance of each replacement vehicle model is different depending on the number of rapid charging and usage time. It is difficult to unify the performance of competitive main batteries, so the replacement business is not successful due to low consumer preference. It is the only technology that can take the lead in the early popularization of electric vehicles as it can extend the mileage as much as necessary and can be returned at any time when not needed to increase consumer satisfaction.

1 is a schematic diagram showing the electrical flow configuration of a typical electric vehicle

2 is a basic conceptual diagram of a mileage extension system for an electric vehicle using a detachable auxiliary battery provided by the present invention.

3 is a block diagram showing a sequence of renting and returning a detachable auxiliary battery through a mileage extension system for an electric vehicle using a detachable auxiliary battery provided by the present invention.

4 to 5 are schematic diagrams showing the configuration of an electric vehicle equipped with a detachable auxiliary battery for extending mileage provided by the present invention.

6 is a cross-sectional view showing a state in which the storage box mounting position in which the detachable auxiliary battery provided in the present invention is installed is applied to the roof of an electric vehicle.

7 is a cross-sectional view showing a state in which the detachable auxiliary battery provided by the present invention is applied to the back and lower part of the back seat of an electric vehicle

8 is a cross-sectional view showing a state in which the detachable auxiliary battery provided by the present invention is applied to the roof and the bottom of the loading box of an electric vehicle configured as a truck

Hereinafter, an embodiment of a mileage extension system for an electric vehicle using a detachable auxiliary battery provided by the present invention will be described based on the accompanying drawings.

1 is a schematic diagram showing the electrical flow configuration of a typical electric vehicle.

In a generally provided electric vehicle (1), a main battery (2) is mounted and fixedly installed, and is electrically connected to the integrated power control device (3).

The integrated power control unit (3) (Electric Power Control Unit, EPCU) serves to improve efficiency by integrating devices that control power in the vehicle. DC Converter) and VCU(6) (Vehicle Control Unit).

The inverter 4 is a device that converts direct current power (DC) of the main battery 2 into alternating current power (AC) to control motor speed. It plays a very important role in improving the drivability of electric vehicles by in charge of acceleration and deceleration commands.

The LDC 5 is a device that supplies power to the electric system 7 by converting the power of the high voltage battery into a low voltage (12V). For example, current for supplying power to the instrument panel, audio system, and various parts and sensors of the electric vehicle 1 is provided.

VCU (6) is one of the most important parts of the integrated power control unit (3) (EPCU) and corresponds to the control tower that oversees the power controller in the vehicle, including motor control, regenerative braking control, air conditioning load control, and electric load power supply. It is in charge of most of the power control related to car cooling, such as control.

The heavy main battery 2 installed in the electric vehicle 1 is installed on the bottom of the vehicle body and is charged through a charger electrically connected to an external power source.

The main battery 2 is formed by combining a plurality of battery unit cells into a module, and by combining the plurality of modules into a pack, the main battery 2 is protected from physical impact in the external environment and can perform a specific role.

The main battery 2 is connected to a BMS 2a (Battery Management System) so that the main battery 2 can be controlled. BMS (2a) refers to a system that receives battery information detected by a sensor, judges the situation, and controls to maintain an appropriate battery condition. The remaining battery capacity measures the charging capacity of each battery cell using various sensors and measurement methods. Through measurement and SOC (remaining capacity of cell) data of each cell measured, it is a method of discharging a cell that is charged higher than other cells to reduce the capacity deviation between cells by making the charging capacity of the cells at a similar level. It provides functionality to balance the cell charging capacity of

The inverter 4 converts the high-voltage DC current provided by the main battery 2 into AC power and supplies it to the drive motor 8 . At this time, the motor control unit 9 (MCU) displays the main battery state information and various types of information estimated from the state information to the driver through the instrument panel.

And, as mentioned above, the LDC (5) is used to provide the high voltage current provided by the main battery (2) to electric components such as the instrument panel, audio system, and various parts and sensors of the electric vehicle (1) with appropriate current. For this purpose, the high voltage current provided by the main battery 2 is converted into DC 12V and provided.

A general electric vehicle 1 having the above configuration can drive as much as the capacity charged in the main battery 2, and when discharging is performed while driving, there is an inconvenience in that the electric vehicle must wait for a long time and charge at a charging station.

In the present invention, when the capacity of the main battery 2 is insufficient while driving, the mileage can be reached through a method of mechanically inserting the detachable auxiliary battery 30 fully charged in advance at a rental place or rest area without the inconvenience of having to wait for a long time and charge it in a short time. After arriving at the destination while extending the required amount, the main battery 2 fixed to the electric vehicle 1 can be habitually slowly charged with time.

The concept of the mileage extension system for an electric vehicle using a detachable auxiliary battery provided by the present invention is that an electric vehicle (1) driven by a main battery (2) is equipped with a storage box (20) in which a detachable auxiliary battery (30) is built in preparation for an emergency. ) Mounting guide rail is provided in the electric vehicle, and when the capacity of the main battery is insufficient while driving, the attachment/detachment auxiliary battery (30) is searched for and stored in a fully charged state in advance at a nearby rental office or roadside rest area. The storage box 20 in which the auxiliary battery 30 is embedded can be mechanically mounted on the guide rail of the electric vehicle 1.

When renting or returning the detachable auxiliary battery 30 at the rental place or roadside rest area, the remaining amount of the used battery is checked to settle the charge.

A rental station or a roadside rest area is provided with a battery capacity check unit 50, which provides a used capacity state of the detachable auxiliary battery 30 when renting or returning the detachable auxiliary battery 30 as described above.

In addition, when a mileage-extending detachable auxiliary battery 30 is needed in case of emergency, the remaining mileage to the destination is calculated through the kiosk 40 provided at a nearby rental office or roadside rest area, and a detachable auxiliary battery 30 with a suitable capacity is provided. choose to provide

3 is a block diagram showing a sequence of renting and returning a detachable auxiliary battery and calculating a usage fee through a mileage extension system for an electric vehicle using a detachable auxiliary battery provided by the present invention.

The order of renting, returning, and settling the detachable auxiliary battery 30 through the mileage extension system for electric vehicles using the detachable auxiliary battery 30 provided by the present invention is 1) the detachable auxiliary battery of the required capacity by the consumer using the kiosk After checking (S10), 2) paying the rental cost (S20), 3) installing the storage box with the detachable auxiliary battery in the electric vehicle (S30), 4) driving to the destination (S40), 5) It is performed in the order of removing and returning the storage box (S50), and 6) checking the used battery capacity and then calculating the rental cost (S60). Each step will be described in detail below.

1) The consumer selects after checking the detachable auxiliary battery of the required capacity (S10)

In the selection of the detachable auxiliary battery 30, the user selects a detachable auxiliary battery 30 with a capacity suitable for the user through the calculation of the mileage to the destination at the kiosk 40 of the rental office or roadside rest area.

2) Payment of rental cost (S20)

The rental cost is paid through the kiosk 40 in the state in which the detachable auxiliary battery 30 is selected as described above. At this time, the rental cost is paid for the rental deposit and the cost of the state in which the detachable auxiliary battery 30 is fully charged. The rental cost can be paid in cash or by a contracted card, and is made through the kiosk 40 . At this time, the detachable auxiliary battery 30 maintains a built-in state in the storage box 20 .

3) Mount the storage box with the detachable auxiliary battery on the guide rail of the electric vehicle (S30)

Mounting the storage box 20 in which the detachable auxiliary battery 30 is built into the guide rail of the electric vehicle 1 is a fully charged detachable auxiliary battery provided at the rental office or roadside rest area when the rental cost is paid as described above ( 30) is coupled to the guide rail provided in the electric vehicle (1) by means of the detachable equipment (60).

4) Driving to destination (S40)

Destination driving is the integration of the electric vehicle 1 by coupling the storage box 20 in which the detachable auxiliary battery 30 is inserted to the electric vehicle 1 and then directly connecting the high-voltage power of the detachable auxiliary battery 30 to the main battery. The electric power control unit 3 (Electric Power Control Unit, EPCU) provides power to the drive motor or electric parts of the vehicle to operate.

5) At the next restart, remove the detachable auxiliary battery to the nearest rental office (S50)

After arriving at the destination, the detachable auxiliary battery (30) is removed, and the next time it is re-operated, visit a nearby rental office or roadside rest area, and use the detachable auxiliary battery (30) installed in the electric vehicle (1) as a detachable device (60). Remove the storage box 20.

6) Check the used battery capacity and settle the rental cost (S60)

After checking the used battery capacity, the rental cost is calculated by using the storage box 20 in which the detachable auxiliary battery 30 has been removed as described above is installed at the rental office or roadside rest area, the battery capacity checking means 50, and the removable auxiliary battery 30 ) After checking the capacity status, the cost is settled.

At this time, after settling the cost according to the usage amount from the rental cost paid in advance, the cost corresponding to the remaining amount is returned to the user.

4 or 5 is a schematic diagram showing the configuration of an electric vehicle equipped with a detachable auxiliary battery for extending mileage provided by the present invention.

As shown in FIG. 4, the electric vehicle 1 in the present invention, as mentioned above, has a main battery 2 installed therein, is electrically connected to the integrated power control device 3, and is integrated. The power control unit (3) (Electric Power Control Unit, EPCU) serves to increase efficiency by integrating devices that control power in the vehicle. Converter) and VCU (6) (Vehicle Control Unit), and in addition, the electric vehicle (1) is characterized by further mounting a storage box (20) in which a detachable auxiliary battery (30) is built-in.

The detachable auxiliary battery 30 may be provided in a module type or a pack type.

The detachable auxiliary battery 30 is used as a detachable type in which a guide rail plate for mounting the storage box 20 is installed on the roof provided in the electric vehicle 1 and under the back of the rear seat, mechanically pushed in from the side or front, and pulled out. do.

The storage box 20 may be provided as a box type in which a detachable auxiliary battery 30 of a pack or module type is embedded.

The guide rail may be provided in a horizontal direction or a vertical direction, and insert grooves formed on the bottom of the storage box 20 from the side and front of the vehicle into the guide rail to be removed and detached. Preferably, guide rails are installed horizontally on the roof so that they can be attached and detached from the side, and the storage box 20 can be prevented from being pushed forward during stopping or sudden braking, thereby providing mounting convenience.

The storage box of the detachable auxiliary battery 30 is mounted on the roof and at the bottom of the back of the rear seat, and is directly connected to the main battery 2 to increase the total capacity of the battery used in case of severe cold, heat, or congestion.

In addition, the detachable auxiliary battery 30 is configured as a pack, and is temporarily directly connected to the driving unit when the main battery 2 is fully discharged in case of emergency so that it can be used for emergency.

The detachable auxiliary battery 30 can be electrically connected to the BMS (2a) (Battery Management System) connected to the main battery 2 so that the detachable auxiliary battery 30 can be controlled at the same time. A second BMS (30a) may be further provided to manage the detachable auxiliary battery (30).

The detachable auxiliary battery 30 may be composed of modules or packs smaller than the rated capacity of the main battery 2 . Preferably, the detachable auxiliary battery 30 of individual capacity, which is divided into 1/2 or less or 1/3 and 1/4 less than the rated capacity of the main battery 2, is divided into plural equally and subdivided according to the extended mileage. It can be configured to select the required capacity.

The detachable auxiliary battery 30 is provided in a state embedded in the storage box 20 so that it can be supplied in a fully charged state in advance at designated rental stations, charging stations, rest areas, etc., and returned after use to nearby charging stations or rest areas. In the automobile 1, only the mounting guide rail board plate is provided, and the storage box 20 is not mounted.

In addition, in providing the detachable auxiliary battery 30, the detachable auxiliary battery 30 provides high voltage current of the detachable auxiliary battery 30 to the driving unit and the electric unit for emergency use in a state in which the main battery 2 with insufficient capacity is supported. make it possible

That is, the inverter 4 converts the direct current power (DC) of the detachable auxiliary battery 30 into alternating current power (AC) to provide it to the driving motor 8, and the LDC (5) converts the direct current power (DC) of the detachable auxiliary battery (30). ) is converted into low voltage (12V) to provide current that supplies power to the instrument panel, audio system, and various parts and sensors of the electric vehicle (1).

6 is a cross-sectional view showing a state in which the detachable auxiliary battery provided in the present invention is applied to the roof of an electric vehicle, and FIG. 8 is a cross-sectional view showing a state in which the detachable auxiliary battery provided by the present invention is applied to the roof of a cargo electric vehicle and to the bottom of a loading box, respectively.

The mounting position of the storage box 20 in which the detachable auxiliary battery 30 provided in the present invention is installed can be provided in various positions of the electric vehicle 1, and the positions shown in FIGS. 6 to 8 are the positions of the present invention. It is shown as an example to aid understanding, but is not limited thereto.

The storage box 20 has a heavy detachable auxiliary battery 30 built in, and it is preferable to install it in a location that provides safety in a part that is not subject to explosion impact from the risk of frontal collision with the rear of the vehicle in front in the event of an accident and convenience of exchange. do.

7 shows a configuration installed on the roof of the electric vehicle 1. The storage box 20 is pushed into the horizontal guide rail installed on the roof from the side narrower than the length of the vehicle to be mounted and fixed. Applicable to passenger car type or SUV type

8 shows a structure in which a vertical guide rail board plate equipped with a storage box is installed so that it can be attached and detached by moving it up and down at an angle of about 45 degrees from the horizontal by utilizing the space below the back of the rear seat of the electric vehicle 1.

According to the drawing, a hydraulic pivoting shaft is installed at the end of the guide rail board plate for mounting the storage box at the lower back of the rear seat, and a guide rail plate for the storage box 20 is also raised and lowered at 45 degrees in the direction of opening and closing the trunk. ) can be configured so that it can be used by opening the trunk, lifting the storage guide rail plate at 45 degrees, pushing the storage box in and installing it, and then lowering it horizontally to the trunk floor. Applicable to passenger car type or SUV type.

According to FIG. 9, it is applied to the electric vehicle 1 having a small truck configuration, and is configured in a sliding manner on the bottom of the loading box or installed in the space between the driver's seat and the loading box.

The detachable auxiliary battery 30 provided by the present invention can be purchased or leased and used by the user, and the method of attaching and detaching the storage box 20 can be opened and closed mechanically after setting a password in the storage box to recognize it. However, it is desirable to ensure that designated rental places for professional handling that are always detachable and installed can be made at gas stations and service areas nationwide.

The capacity selection of the detachable auxiliary battery 30 can be selected arbitrarily by the user, and preferably, the user or the kiosk 40 of the rental office uses a quick way finding app to select the detachable auxiliary battery 30 as much as the required mileage capacity. The remaining distance/time information at the destination is checked by the consumer or the handling center kiosk 40, and the individual capacity of the detachable auxiliary battery 30 suitable for this is selected and installed.

The heavy detachable auxiliary battery 30 is not always mounted to improve fuel efficiency by reducing the total weight of the vehicle body of the electric vehicle 1, and after the electric vehicle arrives at a destination with a lot of time constraints such as a home or office, the main battery and auxiliary battery With the connected part between the batteries turned off, habitually charge only the main battery at a slow rate rather than a quick charge to reduce charging costs and extend the lifespan of the main battery.

Therefore, the detachable auxiliary battery 30 is returned to a nearby rental office at the next restart, and when returning, the remaining amount is checked and the fee is settled, and the charge of the detachable auxiliary battery 30 is returned to a nearby rental office and separately It can be charged with late-night electricity or external eco-friendly electricity.

If the supply of electric vehicles increases, external charging electricity should also increase, but considering that it is not easy in reality, if possible, avoid using inconvenient rapid chargers and use this convenient technology to reach the destination and have time to spare. Electric vehicles (1) It is possible to charge the main battery 2 fixedly installed in the battery at a slow rate habitually using late-night electricity.

Although specific embodiments have been described in the detailed description of the present invention, various modifications are possible without departing from the scope of the present invention. Therefore, the protection scope of the present invention should not be limited to the described embodiments and should not be defined, but should be defined by the equivalents as well as the claims described later.

Claims

A detachable auxiliary battery 30 that is mechanically detached in case of emergency is further installed in the electric vehicle 1 driven by the power of the main battery 2;

The detachable auxiliary battery 30 is composed of a plurality of modules and packs in which a plurality of cells are embedded with the same cell capacity as the capacity of one cell of the main battery 2, and is directly connected to the main battery 2 or to the driving unit, and is detachable auxiliary battery 2. The battery 30 is connected to and integrated with the battery manager system (BMS 2a) of the main battery 2 through the temperature sensing device, each cell management control unit (CMU), and the temperature and emergency shutdown function control unit (PRA). To be controlled by the power control unit 3 (Electric Power Control Unit, EPCU);

The detachable auxiliary battery (30) is stored in a fully charged state in advance at a rental office or a roadside rest area, and is mechanically detachable and coupled within a short time when renting. .
according to claim 1;

a battery remaining amount check means 50 for checking the remaining amount when renting or returning the detachable auxiliary battery 30 at the rental place or roadside rest area;

Calculate the remaining driving distance to the destination by using a kiosk to select and provide a detachable auxiliary battery with the appropriate capacity for the user. A mileage extension system for an electric vehicle using a detachable auxiliary battery, characterized in that it has a kiosk 40 that provides a function of processing.
according to claim 1;

The detachable auxiliary battery 30 is built into a storage box 20 mounted on the electric vehicle 1, and the storage box 20 is mechanically coupled to a guide rail installed on the electric vehicle 1 to provide a main battery or driving unit. A mileage extension system for an electric vehicle using a detachable auxiliary battery, characterized in that it is directly connected to the integrated power control unit (EPCU) and connected so that there is an electrical contact.
according to claim 1;

The storage box (20) is configured to be located on the roof or under the back of the rear seat of the vehicle and on the front side of the truck loading box or on the wall.
according to claim 1;

The detachable auxiliary battery 30 has an individual selection capacity range of 1 to 10 so that the battery capacity suitable for the distance to extend the detachable auxiliary battery 30 composed of modules or packs smaller than the rated capacity of the main battery 2 is necessary. A mileage extension system for an electric vehicle using a detachable auxiliary battery, characterized in that the detachable auxiliary battery (30) subdivided into three plural grades.
according to claim 1;

The detachable auxiliary battery connects two detachable auxiliary batteries mounted on the roof of the vehicle or under the back of the rear seat into one, and is directly connected to the main battery or driving unit to provide a high-capacity battery in preparation for excessive use of electricity during congestion during holidays. A mileage extension system for an electric vehicle using a detachable auxiliary battery, characterized in that it is configured.
according to claim 1;

By using the detachable auxiliary battery, the mileage is extended in case of emergency, and there is plenty of time after arriving at the destination. Charging the main battery with insufficient capacity is 3 to 4 times cheaper than rapid charging and is configured to provide slow charging that can extend the lifespan. A mileage extension system for electric vehicles using a detachable auxiliary battery.