KR101858821B1 - Mobile charging cart system using the used battery of electric vehicle and method for operating the same - Google Patents

Abstract

A mobile recharging cart system using waste batteries of an electric vehicle and an operation method thereof are disclosed. The mobile rechargeable cart system is a mobile rechargeable cart system mounted on a cart. It is a power storage system that reconfigures a battery used in an electric vehicle, a power conversion system that converts the output of a battery system to power a customer's electric car or demand application Device, and a power management device that monitors and controls the power storage system and the power conversion device in real time through an interface between the battery management system and the power conversion device of the power storage system.

Description

TECHNICAL FIELD [0001] The present invention relates to a mobile charging cart system using a waste battery of an electric vehicle, and a method of operating the same. BACKGROUND ART [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a mobile charging cart system, and more particularly, to a mobile charging cart system that provides a mobile charging service using a waste battery of an electric vehicle and a method of operation thereof.

The mobile charging cart can be used in a mart or a public facility where a charger for charging an electric car battery is not installed, or in a case where an electric car needs to be charged within a building, . Such a mobile charging cart is directly carried by a driver and moved to a place where a customer's electric car is located.

About 40% of the price of a mobile charging cart is occupied by the battery, so the price and management of the battery is a very important factor in the mobile charging cart.

Accurate understanding of the state of charge of a battery in a mobile charging cart is of utmost importance in battery management. In the case where the battery charging state can not be accurately estimated to some extent, in the mobile charging cart using the waste battery, the battery is discharged earlier than expected during the provision of the battery charging service or immediately after providing the service, This is because mobile charging carts that can not be used or service are not able to operate using battery power.

As described above, although the mobile charging cart using the waste battery has an advantage of lowering the price of the battery, there is a disadvantage in that stability and reliability of the mobile charging service are low due to difficulty in battery management.

Korean Patent No. 10-1066249 (September 14, 2011)

An object of the present invention is to provide a mobile recharging cart system capable of providing a mobile recharging service in a ward or a certain facility through a power storage system using a waste battery and an operation method thereof have.

It is another object of the present invention to provide an operating method capable of effectively operating a mobile charging cart system based on the charging and discharging characteristics of a waste battery.

According to an aspect of the present invention, there is provided a mobile charging cart system mounted on a cart, comprising: a power storage system configured by reconstructing a battery used in an electric vehicle; A power conversion device for converting an output of the battery system to supply electric power to a customer's electric vehicle or a demand application; And a power management device for real-time monitoring and controlling the power storage system and the power conversion device through an interface between the battery management system of the power storage system and the power conversion device.

Here, the power converter may include a DC-DC converter operating as a buck & booster.

Here, the mobile rechargeable cart system further includes an energy management system, which is connected to the power management device via a network and can integrally monitor and control a plurality of energy storage systems. The power management apparatus receives the order message for the mobile charging service from the energy management system and transmits the charging condition for the mobile charging service acquired from the order message while moving according to the order message, The charging condition acquired through communication with the application may be input to the power conversion device to provide a mobile charging service according to the charging condition.

Here, the mobile recharging cart system may further include a battery analysis system. The battery analysis system can be connected to a power management device over a network and support the operation and maintenance of the energy storage system. The power management apparatus transmits battery state information, battery life information, battery charge / discharge information, and the like to the battery analysis system, and analyzes the battery state information, battery life information, battery charge / discharge information, It is possible to receive information related to battery exchange.

According to another aspect of the present invention, there is provided a power storage system comprising: a power storage system configured by reconfiguring a battery used in an electric vehicle; a power conversion system for converting an output of the power storage system to supply electric power to a customer's electric vehicle or a demand application; And a power management device for real-time monitoring and controlling the power storage system and the power conversion device through an interface between the battery management system of the power storage system and the power conversion device. Receiving an order message for a mobile charging service from an energy management system connected through a network in the power management device and integrally monitoring and controlling a plurality of energy storage systems; The power management apparatus of the cart moved to the destination corresponding to the order message inputs the charging condition included in the order message to the power conversion apparatus or the controller of the customer's electric car or the demand application, Sending and receiving a mobile charging service related message to the application and inputting the charging condition acquired in the mobile charging service related message to the power conversion device; And powering the customer's electric vehicle or the demanding application in accordance with the charging conditions.

According to another aspect of the present invention, there is provided a battery pack comprising: a battery pack mounted on a mobile charging cart main body moved by a driving force of an electric motor; a power conversion device for converting the output of the battery pack to supply the electric power to the electric motor; And a power management apparatus controlling the electric power conversion apparatus to adjust a discharge current amount of the battery in the battery pack according to a load condition on a travel path on which the mobile filling cart main body moves, An energy management system or a battery analysis system connected via a network with the power management apparatus stores first information on a travel route or first information on a load condition on a travel route; Storing second information on a state of charge (SOC) of the battery; Storing third information about the current location of the mobile charging cart; And determining whether the mobile charging cart is operable or not, based on the first information, the second information, and the third information.

Here, the acquisition of the first information can be implemented by the input of the manager, the read information of the camera image mounted on the mobile filling cart, and the like. The acquisition of the second information may also include receiving the SOC information obtained by the power management apparatus from the battery management system in the battery pack through the network. The acquisition of the third information may include acquiring or directly acquiring global positioning system (GPS) information mounted on the mobile charging cart through the power management apparatus, and may be arranged at a predetermined position on the travel route according to another implementation A short range wireless communication device, an RF tag, an RF transceiver, or the like.

If it is determined that the vehicle can be operated in the determining step, reference information or reference data for controlling the discharge of the battery at the lowest C-rate among the C-rate allowed in the load condition on the travel route, To the mobile station. On the other hand, in the actual operation of the mobile charging cart, the C-rate of the battery can be dynamically changed according to the degree of acceleration of the driver by stepping on the accelerator pedal or the degree of deceleration by depressing the brake pedal. Considering this, the present embodiment can cope with providing a management policy for controlling the battery discharge at the lowest C-rate according to the reference information or the reference data in the case of not a rapid acceleration or a maximum acceleration.

In the case of using the mobile charging cart system and its operation method according to the embodiment of the present invention as described above, it is possible to greatly reduce the manufacturing cost of the mobile charging cart by using the waste battery of the electric vehicle, It is possible to provide mobile charging services to consumers such as electric vehicles.

In addition, the mobile charging cart provides a mobile recharging service that minimizes the inconvenience of customers using electric vehicles and reusing waste batteries that have 70-80% of the remaining capacity by installing the waste batteries of electric vehicles, Thereby contributing to the spread of environmentally friendly vehicles.

In addition, it is possible to effectively manage the battery based on the charging / discharging characteristics of the waste battery according to the place where the mobile charging cart is used, thereby substantially extending the battery life, There is an advantage that it can be prevented or warned in advance.

Also, by managing a mobile charging cart system through a remote system, a power storage system using a waste battery can be actively managed, whereby a cart that provides a mobile charging service is loaded with a single power storage system, It is advantageous to effectively provide mobile charging service to other electric vehicles or demand applications. In addition, the battery life can be guaranteed or substantially extended by effectively managing the waste battery.

1 is a side view for explaining a mobile charging cart according to an embodiment of the present invention.
2 is a block diagram of the mobile charging cart of FIG.
3 is an exemplary view illustrating a connection structure between the battery pack and the PCS of FIG.
4 is a block diagram illustrating an operation method of a mobile charging cart system according to another embodiment of the present invention.
5 is an exemplary view for explaining a method of operating a mobile charging cart system according to another embodiment of the present invention.
FIG. 6 is an exemplary diagram illustrating an operation process of a mobile application that can be employed in the operation method of FIG.
7 is an exemplary diagram for explaining another embodiment of the operation process of the mobile application of FIG.
8 is an exemplary view of a golf course topography for explaining a method of operating a mobile charging cart system according to another embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing.

The terms first, second, A, B, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms related to "comprising "," having ", and the like are intended to specify the presence of stated features, integers, steps, operations, elements, parts, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Also, in the present specification, when subscripts of certain characters have different subscripts, other subscripts of subscripts can be displayed in the same form as subscripts for convenience of display.

Unless otherwise defined herein, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted in a manner consistent with the contextual meaning of the related art, and are not to be construed as ideal or overly formal, unless explicitly defined herein.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an illustration of a mobile filling cart illustrating a mobile charging cart system in accordance with an embodiment of the present invention.

1, the mobile charging cart system according to the present embodiment includes a used battery system 20A mounted on a cart 10, a power converting system 22, A power management system 30, and the like.

The cart 10 may be referred to as a mobile charging cart for mobile charging services and may be modified to other forms such as a golf cart, a small freight carrying cart, and the like. The cart 10 may be a single-person or multi-player, and may have a total length of about 3,900 mm, a total width of about 1,400 mm, a height of about 1,800 mm, a minimum ground height of 110 mm, It can be equipped with major specifications of weight about 700/520 (kg / battery), maximum speed about 25 (km / h), maximum travel distance about 50 (km) and lithium battery (51.2V / 100A / 1h).

The mobile charging cart 10 according to the present embodiment may include a waste battery system 20A corresponding to a power storage system or a battery pack. The waste battery system 20 may be referred to as a battery system and may supply drive power to the electric motor 15. [ The electric motor 15 may provide a driving force to the mobile charging cart 10. [ The mobile charging cart 10 may also have a range of coverage that can provide mobile charging services indoors or in certain areas.

The waste battery system 20A refers to a battery system including a waste battery used in an electric vehicle or the like.

The power management device 30 may be connected to the battery in the closed battery system 20A (hereinafter briefly referred to as the battery system) through the power conversion device 22. [ In this embodiment, the battery may be a battery used in an electric vehicle or the like, that is, a re-use battery which is a reconfigured battery by collecting a waste battery. Such a waste battery may be a battery used in an electric vehicle, and the remaining capacity is 70 to 80% of the remaining capacity.

In addition, the power management device 30 may be connected to an antenna having a communication device therein and disposed in the mobile charging cart main body. The power management device 30 may be detachably coupled to the battery system 20A in a form coupled to a serial communication connector.

The power management apparatus 30 mounted in the mobile charging cart 10 of the present embodiment can be connected to an external energy management system (EMS), a battery analysis system (BAS) And receives information or control signals for battery management of the mobile charging cart from the outside and transmits information related to the battery state and the battery charge / discharge to the outside. Based on the received information or signal, The charging and discharging operation and the replacement timing of the battery can be managed according to the environmental conditions (load, etc.). Of course, such battery management may be limited to being performed additionally to communication with the outside for mobile recharging service, but is not limited thereto.

2 is a block diagram of the mobile charging cart of FIG.

Referring to FIG. 2, the mobile charging cart according to the present embodiment may include a mobile charging cart main body, a battery pack 20, a power conversion device (PCS) 22, and a power management device 30.

The mobile filling cart main body includes a front wheel 11, a rear wheel 12, a vehicle body, a brake mechanism 13, a transmission 14, an electric motor 15, a controller 16, a break driver (BD) 17, A brake pedal (BP) 18, and an accelerator pedal (AP)

The battery pack 20 may include a plurality of batteries connected in series and / or parallel, a connection structure of a plurality of batteries, and a case accommodating a plurality of batteries and a connection structure. The battery pack 20 may have a built-in battery management system (BMS). This embedded BMS 21 may be referred to as a slave BMS, a local BMS, or a system BMS.

The battery pack 20 can be charged with electric power through an external charger or a power supply device by a conductive charging or a wireless power transmission method. The conductive charging system refers to a system in which a connector or a cable exposed from the battery pack 20 to the outside of the mobile charging cart 10 is connected to a commercial power supply to receive power. The wireless power transmission scheme refers to a scheme for receiving external commercial power through a wireless power receiving pad disposed in the mobile charging cart 10 and connected to an external wireless power transmission pad by magnetic induction coupling or self-resonant coupling. The AC power applied to the wireless power receiving pad can be appropriately converted to DC and stored in the battery in the battery pack 20. [

In this embodiment, the battery pack 20 may include a power storage system configured by reusing a battery used in an electric vehicle or the like. That is, when the battery pack 20 includes only a power storage system, the battery pack 20 may be referred to as a power storage system. Meanwhile, the battery pack 20 may further include a separate battery system in addition to the power storage system. In that case, the battery system is used as a power source for driving the cart, and the power storage system can be used as a power source for mobile charging service. The battery system can also be reconfigured using a waste battery.

The PCS 22 can supply the electric power of the battery to the electric motor 15 though not clearly shown in the figure. At this time, the PCS 22 can supply electric power to the electric motor 15 at a discharge current (C-rate) of a specific intensity under the control of the power management device 30. [ In addition, the PCS 22 may be implemented so that the output voltage of the battery is automatically adjusted according to the load by simultaneously implementing a buck-booster in the mobile charging service.

The power management apparatus 30 can perform battery management in accordance with the charged state and the charge / discharge characteristic of the waste battery in the battery pack 20 including the electric power storage system created by reconstructing the waste battery of the electric vehicle.

3 is an exemplary view illustrating a connection structure between the battery pack and the PCS of FIG.

3, the mobile charging cart system according to the present embodiment includes a battery pack 20, a PCS 22, and a PMS 30, and the battery pack 20 includes a master BMS and a slave BMS And can be connected to the battery charging connector / inlet 72. Also, the battery pack 20 may be connected to the battery discharge connector / outlet 71 through the DC-DC converter of the PCS 22.

The outlets 71 and the inlets 72 can be implemented so as to be applicable to high voltage DC, low voltage DC, or low voltage AC in battery charge / discharge.

The slave BMS is connected to the master BMS, the master BMS is connected to the system master BMS, and the system master BMS can be connected to the PCS 22 and the PMS 30 via a communication line.

4 is a block diagram illustrating an operation method of a mobile charging cart system according to another embodiment of the present invention.

4, the charging system for a mobile charging cart system according to the present embodiment includes a battery pack 20, a power conversion device (PCS) 22, a power management device (PMS) 30, An energy management system (EMS, 50) and a battery analysis system (BAS, 60).

Each component will be described in detail. First, the battery pack 20 may have a structure in which a plurality of batteries are housed in a predetermined case. The battery pack 20 may have a connection structure (such as a connector) that forms at least one serial structure and / or at least one parallel structure for a plurality of batteries. The battery pack 20 has a capacity (for example, 5 kWh to 7 kWh) capable of providing a driving force to a mobile charging cart for 5 persons and a capacity (for example, several tens to 100 kWh) for providing a mobile charging service can do. The battery pack 20 may be provided with a cooling system for managing the temperature of the battery.

Also, a battery management system (BMS) 21 may be installed in the battery pack 20. In this case, the BMS 21 may be called a slave BMS, a local BMS, or a system BMS, and may acquire and store battery state information such as the voltage, current, and temperature of the battery . The information stored in the BMS 21 may be transmitted to a power management system (PMS) 30, a power management system (PMS) 30, and the like via a communication interface 52, for example, a serial communication interface, an Ethernet interface, An energy management system (EMS) 50, and the like.

The battery includes a lithium ion battery or a lithium ion polymer battery, and a lithium-ion battery may include an anode, a cathode, an electrolyte, and a case. The battery according to the present embodiment may be a power storage system in which a recovered battery (a waste battery) is reconstructed after being used in an electric vehicle for a certain period of time. The use of waste batteries in electric vehicles can significantly reduce the portion of battery charge for mobile charging carts, which is about 40% of the manufacturing cost of mobile charging carts.

A power converting system (PCS) 22 charges and discharges power between a battery and a charger or between a battery and a demanding application (e.g., a customer's equipment requiring power from another common cart or other remote location) Lt; / RTI >

The power conversion device 22 is connected to a battery, a direct current (DC) cable connected to the battery, a DC breaker, a noise reduction device, a power semiconductor device for DC-AC (alternating current) A control board for control, a cable associated with the charger 40, a grid-connected AC breaker, a human machine interface (HMI), a cooling device, and the like.

In Fig. 4, some components of the power conversion device 22 for AC / DC conversion are omitted, and the components for such AC / DC conversion are not disposed on the mobile charging cart body 10, As shown in FIG.

Also, in the present embodiment, the power converter 22 uses a DC-DC converter for a mobile charging service or the like, and its control method can be used in a manner that simultaneously implements a buck-booster. This allows the power conversion device 22 to recognize the actual voltage of the battery through communication with the battery management system and the DC-to-DC converter of the power conversion device 22 to perform the mobile charging It indicates that the output voltage of the power storage system of the cart can be adjusted by itself or automatically depending on the load.

In such a mobile charging service, the buck corresponds to a first operating mode for down-controlling the output voltage for charging the battery with a voltage lower than the rated output voltage of the DC-DC converter, May correspond to a second mode of operation in which the output voltage is raised to charge the battery of a voltage higher than the rated output voltage of the DC-DC converter. That is, in the present embodiment, the first and second operation modes are simultaneously realized in real time in the battery discharge state such as the mobile charging service, so that the power conversion device 22 can automatically adjust the battery output voltage or capacity according to the size of the load have.

With the above-described configuration, it is possible to easily provide a mobile charging service for a cart or a demanding application having different batteries having different rated input voltages and capacities. Of course, it is possible to provide a mobile charging card system which can easily perform a mobile charging service for a hybrid battery even in a hybrid vehicle using a heterogeneous battery.

The power management system (PMS) 30 real-time monitors the battery status such as the charge / discharge voltage, current, and temperature of the battery locally, that is, in the mobile charging cart through the PCS 22 interface, Accordingly, the charge / discharge operation of the battery can be managed. The PMS 30 may share or exchange preset information with the controller of the mobile charging cart main body 10a according to the implementation. The PMS 30 controls the power conversion device 22 in response to the charging condition input through the manager app for the mobile charging service, so that the battery output voltage or capacity Or adjust the C-rate.

Also, the PMS 30 may perform charge / discharge control suitable for the waste battery considering the battery condition of the waste battery before or after the mobile charge service. That is, the PMS 30 relatively accurately estimates the normal operation range within a shorter charge / discharge cycle in battery manufacturing, thereby providing stability and reliability of battery charge / discharge.

To this end, the PMS 30 predicts in advance the discharge capacity and the C-rate according to the travel path of the mobile charging cart, controls the operation permission status such as the operation of the mobile charging cart, , An appropriate battery status message, or mobile charging cart operation information based on the battery status message, to the mobile charging cart user and / or the mobile charging cart operation administrator.

The above-mentioned PMS 30 is mounted on a controller of a mobile charging cart corresponding to a vehicle controller and is implemented as a part of the controller (see 16 in FIG. 3) or a component performing a function corresponding to the function .

As an example, the power management device 30 may be implemented using a program that implements a method of operating the mobile charging cart system according to the present embodiment. That is, the power management apparatus 30 according to the present embodiment includes a processor and a memory, and the processor can execute a program stored in the memory to implement a method of operating the mobile charging cart system.

The processor may include at least one core. A single core corresponds to a central processing unit (CPU) and can be implemented as a system on chip (SOC) in which a micro control unit (MCU) and peripheral devices (integrated circuits for external expansion devices) are arranged together. The core includes a register for storing instructions to be processed, an arithmetic logical unit (ALU) for comparisons, judgments, and calculations, a control unit for controlling the CPU internally for interpreting and executing instructions, unit, an internal bus, and the like.

A processor may also include at least one of one or more data processors, an image processor, and a codec (CODEC). The processor may have a peripheral interface and a memory interface, wherein the peripheral interface connects the processor with the input / output system and various other peripheral devices, and the memory interface can couple the processor with the memory.

The above-described processor may execute data input, data processing, and data output to execute various software programs to perform a battery management method. That is, the processor may execute a specific software module (instruction set) stored in the memory to perform various specific functions corresponding to the module. For example, a processor may efficiently manage a power storage system (e.g., a lithium ion battery) mounted in a mobile charging cart by modules for a battery management method stored in memory, or may be implemented by an external energy management system, It is possible to effectively manage the power storage system of the mobile charging cart.

In this embodiment, the term 'mobile' refers to moving an ESS or power storage system mounted on a cart to a location where a customer's electric car or demand application is located, It can be an expression of how to provide it to a demanding application.

The memory may include a high-speed random access memory such as one or more magnetic disk storage devices and / or a non-volatile memory, one or more optical storage devices, and / or a flash memory. The memory may store software, programs, a set of instructions, or a combination thereof.

Components of the software stored in the memory may include an operating system module, a communication module, a graphics module, a user interface module, a moving picture experts group (MPEG) module, a camera module, one or more application modules, A module is a set of instructions that can be represented as an instruction set or program.

The operating system modules can be used for internal operations such as MS WINDOWS, LINUX, Darwin, RTXC, UNIX, OS X, iOS, Mac OS, VxWorks, Google OS, Android, System, and may have various components (user interface, etc.) for controlling the system operation. The above-described operating system may also have a function of performing communication between various hardware (devices) and software components (modules).

In addition, the communication module may support at least one or more communication protocols such that the power management device 30 is connected to the energy management system or the battery analysis system via a wired and / or wireless network. Of course, the communication module may be implemented to support other communication protocols for connecting to other server devices on the network. Such a communication module may include or drive one or more wireless communication subsystems. The wireless communication subsystem may include a radio frequency transceiver or may include an optical (e.g., infrared) transceiver.

The above-mentioned networks are, for example, Global System for Mobile Communication (GSM), Enhanced Data GSM Environment (EDGE), Code Division Multiple Access (CDMA), W-Code Division Multiple Access (W-CDMA) Term Evolution (LET-A), Orthogonal Frequency Division Multiple Access (OFDMA), WiMax, Wireless Fidelity (Wi-Fi), Bluetooth and the like.

On the other hand, in the present embodiment, the components of the power management apparatus may be functional blocks stored in the memory and executed by the processor, but are not limited thereto. The above-mentioned components are stored in a computer-readable medium (recording medium) in the form of software for implementing a series of functions (battery management method) performed by them, or transmitted to a remote place in the form of a carrier, . ≪ / RTI >

The computer readable medium may include a storage system or a cloud system of a plurality of computer devices connected via a network. At this time, the computer readable medium may store a program or a source code for performing a method of operating the mobile charging cart system in the power management apparatus or controller of the cart according to the present embodiment.

The above-described computer-readable medium may be embodied as a program command, a data file, a data structure, or the like, alone or in combination. Programs recorded on a computer-readable medium may include those specifically designed and constructed for the present invention or those known and available to those skilled in the computer software arts.

The computer-readable medium can also include a hardware device specifically configured to store and execute program instructions, such as a ROM, a RAM, a flash memory, and the like. Program instructions may include machine language code such as those produced by a compiler, as well as high-level language code that may be executed by a computer using an interpreter or the like. The hardware device may be configured to operate with at least one software module to perform the method of operation of the mobile charging cart system of this embodiment, and vice versa.

Referring again to FIG. 4, the PMS 30 according to the present embodiment may include a storage device, a human machine interface (HMI), a frequency controller, and an operation controller. The frequency controller and the operation controller may correspond to the main components of the device implementing the method of operation of the mobile charging cart system according to the present embodiment.

The storage device may store an operating policy or an operating program according to the state of charge (SOC) of the battery, and may store a selection policy of an appropriate charger installed in the middle of a driving route or a program based on the selection policy. In addition, the storage device may store location information obtained from GPS, RF tags, and the like.

The frequency controller can control the power supplied from the battery to the electric motor of the mobile charging cart. The frequency controller can control the power conversion device (PCS) 22 connected to the battery via a predetermined communication protocol. In addition, the frequency controller can be used not only to perform mobile charging service operation by controlling the operation of the power conversion device with respect to the battery, but also to adjust the C-rate of the battery according to the driving route of the mobile charging cart. The route can include conditions such as a downward slope, a flat slope, a large slope up slope, a gentle slope up slope, and the corresponding minimum C-rate.

In this embodiment, the frequency controller preliminarily stores the status information of the traveling path of the mobile charging cart, monitors the status of the battery to predict the charging status, determines the charging status of the current mobile charging cart on the basis thereof, The mobile charging cart is operated so that the mobile charging cart is operated at the lowest allowable C-rate according to the position on the travel path of the charging cart, that is, the driving motor of the mobile charging cart (see 15 in FIG. 2) The power supply of the battery is interrupted due to the excessive discharge of the battery, thereby preventing the problem of suddenly stopping the mobile charging cart.

The HMI may include means for converting the data used for machine control into a human-friendly form, or a component or device that performs a function corresponding to such means. Using an HMI, a person or an administrator can monitor and control the operation of the power storage system or the battery system as needed.

The operating controller may be provided to control the discharging operation of the battery connected to the power converter. The operating controller can be connected to an energy management system (EMS, 50) or a battery analysis system (BAS 60) to transmit battery-related information, receive operational data based on battery-related information, It is possible to receive the determined battery management related information or signal.

The operation controller may include a storage unit for storing travel route information of the mobile charging cart, a comparison unit for comparing location information and travel route information, and a determination unit for determining optimal and minimum battery discharge currents according to the comparison result .

The BMS 21 described above is not mounted on the battery pack 20 but may be implemented as a part of the PMS 30 described above or a part of the PMS 30 performing functions corresponding to the functions . In this case, the BMS 21 and the PMS 30 may be referred to as an integrated PMS 30A. Also, the integrated PMS 30A or the PMS 30 can be made and installed in the form of a removable module device in the battery pack 20. In this case, the integrated PMS 30A or the PMS 30 may be connected to the battery pack 20 by a vehicle serial communication connector, a cable, or the like.

An energy management system (EMS) 50 is a system that monitors and controls a mobile energy storage system (e.g., a battery system using waste batteries of an electric vehicle) that is each mounted in a plurality of mobile charging carts remotely . ≪ / RTI > The EMS 50 may have an integrated configuration for controlling a plurality of vehicles.

Of course, the EMS 50 accepts the customer's order for the mobile charging service as a basic function, and can transmit the order message to the power management device 30 of the mobile charging cart according to the received order.

The EMS 50 is electrically connected to the battery system of the battery pack 20 and the PCS 22 to monitor the power supply state of the battery and the power demand state of the load (electric motor) Charging and discharging of the battery can be controlled according to the power supply / demand state based on the demand state.

In addition, the EMS 50 according to the present embodiment determines whether to discharge or charge the battery in consideration of the real-time load conditions required for the electric motor on the travel path of the mobile charging cart and the state of charge (SOC) Based on the battery status, the operating mode of the mobile charging cart or the battery priority charging mode can be determined. The determined mode may be used to control the PCS 22.

A battery analysis system (BAS 60) includes a system for supporting stable operation and maintenance of a battery system using a waste battery mounted in a mobile charging cart. The BAS 60 acquires the battery status information, the battery charging / discharging information, and the like from the remote and judges the state of health (SOH) of the re-use battery of each mobile charging cart based on this information can do.

The BAS 60 may be a battery system provider / manufacturer that provides a battery system using a waste battery to a mobile charging cart operator, in which case the battery system provider / manufacturer may provide information on waste battery operation results and information collected by the BAS 60 The state of the battery system of the mobile charging cart can be easily calculated, and the maintenance of the battery system of the mobile charging cart can be performed with high efficiency.

The BAS 60 stores battery-related information such as charging and discharging characteristic curves of the waste batteries, operation information (including temperature information of each battery) for charging and discharging operations of the waste batteries mounted on the mobile charging cart, And the battery information and operation information are compared with each other to map to the reference information, and the charging state or the life of the battery can be determined according to the most similar charge / discharge characteristics at present. The determined information may be provided to the PMS 30 and used to manage the power storage system or the battery system.

Of course, the above-described BAS 60 can analyze the battery status of the power storage system used for the mobile charging service and provide the information for battery management to the power management apparatus or to the service manager.

The above-described operating method of the mobile charging cart system can automatically adjust the output voltage of the power storage system according to the load in the mobile charging service.

In addition, the above-described method of operating the mobile charging cart system includes a mobile charging cart main body which is moved by a driving force of an electric motor, a battery pack mounted on the mobile charging cart main body, The amount of discharge current of the battery system / power storage system in the battery pack can be adjusted according to the load condition on the travel path of the mobile charging cart main body by controlling the power conversion device and the power conversion device.

That is, in one embodiment, the energy management system or the battery analysis system connected with the power management apparatus via the network may include first information on the travel route of the mobile charging cart or first information on the load load condition on the travel route Storing second information on the state of charge (SOC) of the battery in the battery charging system or the power storage system mounted on the mobile charging cart, and storing third information on the current position of the mobile charging cart And determining whether the mobile charging cart is operable or not, based on the first information, the second information, and the third information.

The acquisition of the first information may be implemented by an input of an administrator, reading information of a camera image mounted on the mobile filling cart, or the like. The acquisition of the second information may also include receiving the SOC information obtained from the battery management system by the power management apparatus through the network. The acquisition of the third information may include acquiring or directly acquiring global positioning system (GPS) information mounted on the mobile charging cart through the power management apparatus, and may be arranged at a predetermined position on the travel route according to another implementation A short range wireless communication device, an RF tag, an RF transceiver, or the like.

According to the above-described embodiment, it is possible to provide a mobile recharging service to other general carts in an environment in which the recharging infrastructure is insufficient, for example, in an environment in which a charger installation place in a golf course is insufficient, and a stable and reliable mobile Charging service can be provided. This can solve the barrier to the spread of the mobile filling cart to facilities such as golf courses. In addition, the power storage system or the battery system (including the waste battery) of the mobile charging cart can be efficiently and efficiently installed in the mobile charging cart disposed in the collective use facilities such as shopping mall, highway rest area, training center, The reliability of the mobile charging service can be improved. In addition, it is possible to reduce the maintenance cost of the mobile charging cart by charging the battery of the mobile charging cart with the nighttime electricity, thereby lowering the charging rate compared to the charging during the daytime.

Meanwhile, although the mobile charging cart has been described in the above embodiment, the present invention is not limited to such a configuration, and it is obvious that the present invention can be easily applied to a cart or a small vehicle having a structure or function similar to a mobile charging cart .

5 is an exemplary view for explaining a method of operating a mobile charging cart system according to another embodiment of the present invention.

5, the mobile charging cart system according to the present embodiment may include a drive unit 16A, a battery pack 20, and a rapid charger 30B mounted on the body / body of the cart 10 .

The driving unit 16A may include the controller, the bracket driving device, and the like shown in Fig.

The rapid charger 30B may include the power conversion device 22 and the power management device 30 of FIG. 3, the inlet and outlet of FIG. 3, and the like.

In the present embodiment, the quick charger 30B can receive information or messages from the mobile application (App) 80 side of the customer for a mobile charging service (MC service).

FIG. 6 is an exemplary diagram illustrating an operation process of a mobile application that can be employed in the operation method of FIG.

Referring to FIG. 6, in the method of operating the mobile charging cart system according to the present embodiment, a customer can request a mobile charging service using an app of a customer terminal.

For example, the customer terminal app can check the parked position or obtain the location information of the electric car or the general cart (S61). Next, the charging port can be opened (S62). Next, the charging can be requested through the mobile charging service to the energy management system (EMS) through the application (S63). Next, when the mobile charger for the mobile charging service arrives and the mobile charger is connected to the charging port of the ordinary cart or electric car, the charging can be allowed or the charging status can be monitored (S64).

Meanwhile, the manager application providing the mobile charging service can receive the order message for the mobile charging service from the energy management system or other customer center (S65). Next, when the mobile charging cart is moved to the place where the customer's electric car or general cart is located according to the order message, the mobile charger or the quick charger of the mobile charging cart is connected to the battery of the customer's electric car or the general cart to supply power (S66). Also, depending on the implementation, the manager app may determine whether the mobile charging cart can move to a location to provide another mobile charging service based on its own battery power, provide another mobile charging service , It is possible to provide another mobile charging service and determine whether the battery can be moved to a standby place or a nearby charger, and perform battery management according to the determination (S67).

7 is an exemplary diagram for explaining another embodiment of the operation process of the mobile application of FIG.

Referring to FIG. 7, in the operation method of the mobile charging cart system according to the present embodiment, the following user interface can be provided through the customer terminal app.

That is, the login screen for the registered customer can be provided (S71).

In addition, a dashboard for the mobile charging service can be provided to the logged-in customer (S72). The dashboard can provide customer information such as face pictures, names, and service items related to the mobile charging service. The service items associated with the mobile charging service may include check in, charge history, customer service, notifications, license profile, and the like.

In addition, the current parking position of the customer's electric car or cart can be checked through the function in the check-in item, and displayed on the screen as a satellite picture (S72).

In addition, an input window for inputting a detailed request item of the customer can be provided (S73).

In addition, the past charging history can be listed and displayed in the order of the charge history item through the function in the charge history item (S74).

On the other hand, the battery used in the mobile recharging cart system is a waste battery used in an electric vehicle or the like. Therefore, the battery has a shorter life span (SOH) than the first battery that is not used after being produced, and exhibits a charge / discharge characteristic that is lower than a typical charge / discharge characteristic based on the first battery even in charge / discharge characteristics.

That is, according to a typical charge / discharge curve of a lithium battery, when a battery has a current discharge rate of less than 1 C rate under a certain temperature (for example, 25 ° C) condition, Lt; / RTI >

For example, when comparing the case where the discharge current amount or the current discharge amount (C-rate) of the battery is 0.2C rate and the case of 10C rate which is 50 times larger than this, the discharge curve shows a case where the current discharge amount is large It is well known that it exhibits significantly reduced discharge characteristics.

Considering the charging and discharging characteristics of the battery, in the present embodiment, when using a reusable battery in which a waste battery is reconfigured as a battery of a mobile charging cart operated in a premise or a limited place, A method for operating a mobile recharging cart system.

In the battery management method of the present embodiment, the battery discharge is controlled at the lowest C-rate allowed in the current travel period in consideration of the load required in the travel path of the mobile charging cart, The charging time of the battery mounted on the mobile charging cart is determined in order to prevent an accident that the power supply of the battery system suddenly stops and the mobile charging cart can not be operated. Here, the lowest C-rate allowed in the current travel period may be the lowest C-rate considering the error occurring in estimating the state of charge of the battery.

A mobile charging cart system used in a golf course will be described below with reference to the above-mentioned operating method.

8 is an exemplary view for explaining a method of operating a mobile charging cart system according to another embodiment of the present invention.

The mobile charging cart 10 according to the present embodiment can be operated to provide mobile charging service to other carts at the golf course. That is, the mobile charging cart 10 can provide a mobile charging service to go to the place where the general electric cart is located and charge the battery of the general electric cart when the general electric cart in the golf course can not move due to the battery discharge.

Since such a mobile charging cart 10 uses a waste battery, its own battery management also needs to be strict. For example, it is necessary to calculate the battery capacity used for the cart drive and the battery capacity used for the mobile recharge service so that the mobile charging cart 10 is not in trouble.

That is, since the mobile charging cart 10 also displays different amounts of battery discharge depending on the place of use, driving habits of the driver, and other operating environments, the amount of battery discharge is predicted in advance to ensure normal operation of the mobile charging cart 10 There is a need. Therefore, in this embodiment, a method of managing the battery according to the terrain of the place where the mobile charging cart 10 is operated is suggested.

More specifically, as shown in FIG. 5, the golf course is designed such that the running road of the mobile filling cart is divided into a downward section I, a flat section II, a large uphill section III, An uphill section IV of the incline and another section IV of the flat section. In FIG. 5, box c next to the mobile charging cart 10 may be a charger capable of charging the battery of the mobile charging cart 10 in a conductive charging manner.

The outputs of the electric motors required for normal operation of the mobile charging cart 10 in the above-described intervals may be different from each other. For example, the electric motor may be controlled to output a force at a maximum C-rate or a C-rate higher than a first level at a higher gradient in the upward sloping section III. Further, in the downward section I, the electric motor can be controlled to output a predetermined force at the lowest C-rate or C-rate higher than the second level. Here, the first level is greater than the second level, and depending on the implementation, the second level may be as much as 50 times less than the first level.

According to the present embodiment, the mobile charging cart can have different battery outputs in each section to obtain the driving force of the electric motor required according to the travel section. That is, the battery output may be different in the downward section I, the flat section II, the large upslope section III, the gentle upslope section IV, and the other flat section V.

Further, in the battery output, a maximum battery output may be required in a large inclined uphill segment III, and a second battery output less than the maximum battery output in a gentle uphill segment IV may be required A smaller third battery output may be required in the gentle incline section IV in the flat sections II and V and a smaller third battery output may be required in the down section I than in the flat section II, Battery output may be required.

As described above, according to the present embodiment, the battery discharge is controlled at the lowest C-rate in the flat section (II, V) or the down section (I) in the range of the preferable C-rate, It is possible to control the battery discharge at the maximum C-rate and control the battery discharge at the C-rate as low as possible within the allowable range in the flat section or the gentle uphill section (IV) It can prevent sudden stop of battery output and extend battery life.

That is, according to the present embodiment, it is possible to increase the stability of the operation that can safely operate the travel route of a certain distance in the short term, and to extend the battery life in the long term.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

Claims (5)

1. A mobile rechargeable cart system mounted on a cart,
A battery pack including a waste battery;
A power converter for converting an output of the battery pack to supply power to an electric vehicle or a demand application; And
And a power management apparatus for real-time monitoring and controlling the battery pack and the power conversion apparatus through an interface between the battery pack and the power conversion apparatus,
Wherein the power management device controls discharge of the waste battery according to characteristics of the terrain during operation of the cart. The method according to claim 1,
Wherein the power conversion device comprises a DC-DC converter operating as a buck & booster. The method according to claim 1,
Further comprising an energy management system coupled to the power management device via a network for integrally monitoring and controlling the plurality of energy storage systems. The method of claim 3,
Further comprising a battery analysis system connected to the power management device via a network and supporting operation and maintenance of the energy storage system. A battery pack mounted on a cart and including a waste battery, a power conversion device for converting an output of the battery pack to supply power to an electric vehicle or a demand application, And a power management device for monitoring and controlling the power conversion device in real time and controlling the discharge of the waste battery according to the characteristics of the terrain during operation of the cart,
Receiving an order message for a mobile charging service from an energy management system connected through a network in the power management device and integrally monitoring and controlling a plurality of energy storage systems;
The power management device of the cart moved to the destination corresponding to the order message inputs the charging condition included in the order message to the power conversion device or the controller of the electric vehicle or the demand application, Transmitting and receiving a mobile charging service related message and inputting a charging condition acquired in the mobile charging service related message to the power conversion device; And
And powering the electric vehicle or the demanding application according to the charging conditions.

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