WO2024071534A1

WO2024071534A1 - Electric vehicle charge control server and charge control method

Info

Publication number: WO2024071534A1
Application number: PCT/KR2023/001775
Authority: WO
Inventors: 이동우
Original assignee: 엘지전자 주식회사
Priority date: 2022-09-28
Filing date: 2023-02-08
Publication date: 2024-04-04
Also published as: WO2024071541A1

Abstract

The present invention relates to a charge control server for controlling a charging station for charging a battery of an electric vehicle, the charge control server comprising: a charging station management server which manages and controls at least one charging station, receives vehicle identification information from at least one among an electric vehicle or the charging station, identifies a battery model corresponding to the received vehicle identification information, and, if any one among a plurality of degradation-delaying charging protocols corresponding to the identified battery model is determined, controls the charging station so that the battery is charged by means of a procedure according to the determined degradation-delaying charging protocol; and a battery management server which contains information related to the plurality of degradation-delaying charging protocols corresponding to mutually different battery models, determines any one among the plurality of degradation-delaying charging protocols on the basis of the identified battery model, and provides information related to the determined degradation-delaying protocol to the charging station management server.

Description

Electric vehicle charging control server and charging control method

The present invention relates to a charging control server that charges a battery of an electric vehicle and a method of charging the battery.

As the problem of environmental pollution due to the increase in greenhouse gases is currently emerging, the need to use eco-friendly energy has emerged. And as part of these needs, the use of electric vehicles that use electrical energy as a power source is increasing. In the case of these electric vehicles, their use is increasing due to many advantages, such as vehicles that are driven purely by electricity, do not emit exhaust fumes, do not cause pollution, have a simple structure, and are highly efficient.

Such electric vehicles are typically driven by charging a battery with electric energy supplied from an electric source and using the power charged in the battery. And since electric vehicles cannot be driven when all of the electrical energy charged in the battery is discharged, electric vehicles necessarily require large-capacity batteries.

Meanwhile, larger-capacity batteries have the advantage of being able to charge more electrical energy, but there is a problem in that it takes a long time to charge the battery. Accordingly, a social need to charge batteries more quickly has emerged, and to this end, the amount of electrical energy (current amount) supplied until a certain voltage is reached, such as CC-CV (Constant Current - Constant Voltage) charging. ) A fast charging method has emerged that increases the charging speed of the battery.

However, batteries typically have a voltage difference between an anode and a cathode separated by a separator, and when charging of the battery begins, electrons from the anode can move to the cathode through the separator. On the other hand, compared to regular charging, fast charging increases the charging speed by increasing the amount of current supplied to the battery. In fast charging, a much larger number of electrons pass through the separator than the number of electrons passing through the separator during constant speed charging. do. Additionally, because electrons are concentrated around the separator, the load on the separator increases. This increased load on the separator accelerates the deterioration of the separator, and deterioration of the separator means deterioration of the battery. Therefore, the current fast charging method is capable of charging the battery at high speed, but has the problem that the battery deteriorates quickly.

The present invention aims to solve the above-described problems and other problems. The purpose of the present invention is to provide an electric vehicle charging control server and a charging control method that can speed up the battery charging speed of an electric vehicle and delay battery deterioration. do.

Another object of the present invention is to provide an electric vehicle charging control server and a charging control method that allows charging to be performed in an optimized charging method according to the state of electric vehicle battery deterioration.

According to one aspect of the present invention to achieve the above or other objects, a charging control server for controlling a charging station manages and controls at least one charging station, receives vehicle identification information from at least one of the electric vehicle or the charging station, and , identifies a battery model corresponding to the received vehicle identification information, and when one of a plurality of degradation delay charging protocols according to the identified battery model is determined, the battery is charged so that the battery is charged in a manner according to the determined degradation delay charging protocol. A charging station management server that controls the station, and information related to a plurality of degradation delay charging protocols corresponding to each different battery model, and one of the plurality of degradation delay charging protocols according to the identified battery model. It is characterized in that it includes a battery management server that provides information related to the decision and the determined degradation delay protocol to the charging station management server.

In one embodiment, the state information of the battery includes a charging time required for charging to a preset target voltage, a battery charging state according to the size of the charging current, an increase in battery voltage according to the charging time or charging current, and the charging It is characterized in that it includes at least one of battery temperature change according to time or charging current.

In one embodiment, the plurality of degradation delay charging protocols are a MSCC-CV (Multi-stage Constant Current - Constant Voltage) charging protocol or duty cycle that controls the charging sequence so that the current value is gradually reduced. It is characterized by a PC (Pulse Charging) charging protocol that modulates the charging current or charging voltage in the form of a pulse according to the charge duty and rest duty and supplies it to the battery.

In one embodiment, the control parameter varies depending on the type of the degradation delay charging protocol, and the battery management server reduces the size of the charging current when the degradation delay charging protocol is the MSCC-CV charging protocol. At least one of the number of each stage, the transition conditions of the stages, and the maximum current value for each stage is transmitted as the control parameter to the charging station management server, and the degradation delay charging protocol is the PC-type charging protocol. In the case, the frequency of the charging current or charging voltage supplied in pulse form, the duty cycle of the charging current or charging voltage supplied in pulse form, time values corresponding to the supply and rest period, and the supply and rest period. Characterized in that at least one of the magnitude of the charging current or the charging voltage supplied to the charging station is transmitted as the control parameter to the charging station management server.

In one embodiment, the charging station management server receives updated control parameters from the battery management server and sends the received control parameters and information about one of the degradation delay charging protocols to the battery management server. It is characterized in that it is stored in association with vehicle identification information.

In one embodiment, when the electric vehicle and the charging station satisfy a preset condition, the charging station management server stores information on one of the degradation delay charging protocols and the control parameters stored in association with the vehicle identification information. information is transmitted to the charging station, and the preset conditions are conditions related to starting charging of the battery, such as whether the charging terminal of the electric vehicle and the supply terminal of the charging station are coupled or whether the electric vehicle corresponds to the charging station. It is characterized in that satisfaction is determined depending on whether the work area is entered or not.

In one embodiment, the charging station management server depends on whether a communication connection is possible with an expansion module of the electric vehicle installed to charge the battery according to the degradation delay charging protocol, via the charging station or directly from the electric vehicle. , Characterized in determining whether there is a degradation delay charging protocol applicable to the battery.

In one embodiment, the vehicle identification information is any one of the electric vehicle identification information (EVCC ID (Electric Vehicle Communication Controller) ID), the vehicle number of the electric vehicle, owner information of the electric vehicle, and information on a specific payment method. It is characterized by .

In one embodiment, when there is no protocol applicable to the identified battery model among the plurality of degradation delay charging protocols, the charging station management server operates the charging station according to the CC-CV (Constant Current - Constant Voltage) charging protocol. It is characterized in that information of the CC-CV protocol is transmitted to the charging station to charge the battery.

In one embodiment, the battery management server further collects battery state information when the battery is discharged, determines the degree of deterioration of the battery based on the collected battery discharge state information, and determines the degree of deterioration of the battery. The control parameters are updated accordingly.

In one embodiment, the charging station management server, if the battery of the electric vehicle corresponding to the vehicle identification information has a history of being charged according to a specific degradation delay charging protocol among the plurality of degradation delay charging protocols, the charging station management server may detect the specific degradation delay charging protocol. Information on the delayed charging protocol and control parameters of the specific degradation delayed charging protocol are transmitted to the charging station.

In one embodiment, the charging station management server determines at least one degradation delay charging protocol that the charging station can support, and at least one degradation delay charging protocol applicable to the battery model of the electric vehicle corresponding to the vehicle identification information. Characterized in that, based on a result of comparing a protocol and at least one degradation delay charging protocol that the charging station can support, information on one degradation delay charging protocol or information on a CC-CV charging protocol is transmitted to the charging station. do.

The effects of the electric vehicle charging control server and charging control method according to the present invention will be described as follows.

According to at least one of the embodiments of the present invention, the charging control server that controls charging of an electric vehicle is provided by the method (Constant Charging (CC), Pulse Charging (PC)), time, or charging state by which charging current is supplied. Fast charging by varying at least one of the size of charge current according to (SOC, State Of Charge), current supply or rest duty according to duty cycle, and current supply frequency. It has a plurality of charging protocols (hereinafter referred to as deterioration-delayed charging protocols) that delay the deterioration of the battery, and allows rapid charging of the battery according to one deterioration-delayed charging protocol according to the battery specifications of the electric vehicle. Therefore, there is an effect of speeding up the charging speed and minimizing the deterioration of the battery depending on the characteristics of the battery.

In addition, according to at least one of the embodiments of the present invention, the present invention determines the deterioration state of the battery based on battery state information detected during charging of the battery, and sets a control parameter of the deterioration delay charging protocol corresponding to the battery ( The degradation delay charging protocol corresponding to the battery can be updated by changing at least one of the parameters. And, the battery can be charged according to the updated degradation delay charging protocol. Therefore, the present invention has the effect of providing customized deterioration-delayed fast charging that can accelerate charging speed while minimizing battery deterioration depending on the deterioration state of the battery.

Figure 1 is a conceptual diagram illustrating an electric vehicle charging control system according to an embodiment of the present invention, in which electric vehicles are charged according to a charging protocol provided by a charging control server.

Figure 2 is a block diagram showing the configuration of a charging control server, an electric vehicle, and a charging station according to an embodiment of the present invention.

Figure 3a is an exemplary diagram showing the CC-CV charging protocol among the charging protocols according to an embodiment of the present invention.

Figure 3b is an exemplary diagram showing an example of MSCC charging protocols among the degradation delay charging protocols according to an embodiment of the present invention.

Figure 4a is an exemplary diagram showing an example of a PC-type charging protocol among the degradation delay charging protocols according to an embodiment of the present invention.

Figure 4b is an illustration showing an example of CCCF-type charging protocols among PC-type degradation delay charging protocols according to an embodiment of the present invention.

Figure 5 is an exemplary diagram showing examples of CCVF and VCCF charging protocols among PC-based degradation delay charging protocols according to an embodiment of the present invention.

Figure 6 is an example diagram showing the DVV type and VFV type charging protocols among the PC type deterioration delay charging protocols according to an embodiment of the present invention.

Figure 7 is a flowchart showing an operation process in which charging is performed according to a deterioration delay charging protocol corresponding to the battery of an identified electric vehicle in the electric vehicle charging control system according to an embodiment of the present invention.

FIG. 8 is a flowchart illustrating in more detail the operation process of the charging control server that detects the charging protocol corresponding to the battery of the electric vehicle identified during the operation process of FIG. 7.

FIG. 9 is a flowchart illustrating in more detail the operation process of the charging station that generates and supplies charging current according to the charging protocol corresponding to the battery of the identified electric vehicle during the operation process of FIG. 7.

FIG. 10 is a flowchart illustrating in more detail the operation process of an electric vehicle transmitting battery state information according to the charging state of the battery to the charging control server during the operation process of FIG. 7.

Figure 11 is a block diagram showing a configuration in which the charging sequence of the charger is controlled according to firmware provided by the charging station management server.

Figure 12 is a flowchart showing the operation process of the charging station in which the firmware of the charging station is updated by the charging station management server.

It should be noted that the technical terms used in this specification are only used to describe specific embodiments and are not intended to limit the present invention. Additionally, as used herein, singular expressions include plural expressions, unless the context clearly dictates otherwise. The suffixes “module” and “part” for components used in the following description are given or used interchangeably only for the ease of writing the specification, and do not have distinct meanings or roles in themselves.

As used herein, “consists of.” or “including.” Terms such as these should not be construed as necessarily including all of the various components or steps described in the specification, and some of the components or steps may not be included, or additional components or steps may be included. It should be interpreted to include more.

Additionally, when describing the technology disclosed in this specification, if it is determined that a detailed description of a related known technology may obscure the gist of the technology disclosed in this specification, the detailed description will be omitted.

In addition, the attached drawings are only for easy understanding of the embodiments disclosed in this specification, and the technical idea disclosed in this specification is not limited by the attached drawings, and all changes included in the spirit and technical scope of the present invention are not limited. , should be understood to include equivalents or substitutes. In addition, each embodiment described below, as well as a combination of embodiments, are changes, equivalents, or substitutes included in the spirit and technical scope of the present invention, and of course, may fall within the spirit and technical scope of the present invention. .

FIG. 1 is a conceptual diagram illustrating an electric vehicle charging control system according to an embodiment of the present invention in which the electric vehicle 30 is charged according to a charging protocol provided by the charging control server 10.

Referring to FIG. 1, the electric vehicle charging control system according to an embodiment of the present invention includes an electric vehicle 30 equipped with a battery, a charging station 20 that supplies charging current to the battery of the electric vehicle 30, and the It may be configured to include a charging control server 10 that controls the charging process performed at the charging station 20.

Here, when a preset condition is met, at least one of the electric vehicle 30 and the charging station 20 sends identification information of the electric vehicle 30 or at least one of the batteries provided in the electric vehicle 30 to the charging control server 10. It can be provided by sending it to .

As an example, when the supply terminal of the charger (or charging module) of the charging station 20 and the charging terminal of the electric vehicle 30 are combined, or if the electric vehicle 30 is in the area corresponding to the charging station 20 When entering, the charging station 20 can establish a communication connection with the electric vehicle 30 and obtain vehicle identification information and battery identification information based on the electric vehicle 30 connected to communication. And the detected vehicle identification information and battery identification information can be transmitted to the charging control server 10.

Additionally, the vehicle identification information may be identification information (ID) of the communication unit of the electric vehicle 30, that is, an Electric Vehicle Communication Controller (EVCC). In this case, the charging control server 10 may be provided with an identification information database including vehicle identification information corresponding to the ID of the EVCC and identification information of the battery installed in the vehicle, and based on the identification information database, You can search vehicle identification information corresponding to EVCC ID. Additionally, battery identification information corresponding to the searched vehicle identification information can be searched.

Here, the identification information database includes vehicle identification information, EVCC ID information associated with the vehicle identification information, vehicle owner information, payment method information, battery identification information, battery model information corresponding to the battery identification information, and battery deterioration state (deterioration degree). ) may include at least some of. Here, the battery model information may further include information about at least one of the manufacturer and year of manufacture of the battery.

Alternatively, the vehicle identification information may be information provided directly from the electric vehicle 30 to which the communication is connected. In this case, the charging station 20 may request vehicle identification information from the communication-connected electric vehicle 30, and the electric vehicle 30 may transmit and provide vehicle identification information to the charging station 20 in response to the request. You can. Alternatively, the driver of the electric vehicle 30 may directly transmit and provide vehicle identification information according to the request of the charging station 20.

Meanwhile, the driver may provide the driver's individual identification information instead of vehicle identification information. In this case, the identification information database of the charging control server 10 may include vehicle identification information corresponding to the driver's identification information (driver ID) and identification information of the battery provided in the vehicle, and may be stored in the identification information database. Based on this, vehicle identification information of the vehicle corresponding to the driver ID can be searched. Additionally, battery identification information corresponding to the searched vehicle identification information can be searched.

Here, the driver's individual identification information may be user information input for the payment during the payment process prior to charging the electric vehicle. In this case, the charging control server 10 can query the vehicle identification information corresponding to the user information entered for payment (e.g., using an identification information database containing vehicle identification information corresponding to the user information), and the searched vehicle Battery identification information corresponding to the identification information can be searched. Also, here, the user information may be the user's credit card number used for payment.

Alternatively, when a vehicle approaches an area surrounding the charging station 20, the charging station 20 may obtain vehicle identification information by scanning the vehicle license plate number of the approaching vehicle. In this case, the charging station 20 may include a camera for scanning the vehicle number and a recognition unit for recognizing the vehicle number from the camera.

Meanwhile, contrary to the above-mentioned, when the supply terminal of the charger (or charging module) of the charging station 20 and the charging terminal of the electric vehicle 30 are combined, or the electric vehicle within an area corresponding to the charging station 20 When 30 enters, the electric vehicle 30 may establish a communication connection with the charging control server 10 and transmit vehicle identification information (e.g. vehicle number) and battery identification information to the charging control server 10. ) can also be provided by sending it to .

Alternatively, the charging station 20 and the electric vehicle 30 may separately transmit vehicle identification information and battery identification information to the charging control server 10. In this case, the charging station 20 transmits identification information of the electric vehicle 30 entering a certain area to the charging control server 10, and when the electric vehicle 30 also enters an area corresponding to the charging station 20 Your identification information can be transmitted to the charging control server 10. Then, when the same vehicle identification information is received from both the charging station 20 and the electric vehicle 30, the charging control server 10 determines whether the electric vehicle 30 has actually entered an area corresponding to the charging station 20. It can be judged that

And when it is determined that the electric vehicle 30 has actually entered an area corresponding to the charging station 20, the charging control server 10 may request battery identification information from the electric vehicle 30 through which communication is connected. And in response to the request, battery identification information can be received from the electric vehicle 30.

Meanwhile, the charging control server 10 can detect whether there is a degradation delay charging protocol corresponding to the obtained vehicle identification information and battery identification information. In the case where there is no deterioration delay charging protocol corresponding to the vehicle identification information and battery identification information obtained as a result of detection, first, the battery of the electric vehicle (hereinafter identified battery) corresponding to the vehicle identification information is deteriorated according to an embodiment of the present invention. It is possible to determine whether charging according to the delayed charging protocol is possible.

As an example, the charging control server 10 may first detect whether there is a degradation delay charging protocol applicable to the battery model of the identified battery. And, depending on whether there is an applicable degradation delay charging protocol, it can be determined whether charging according to the degradation delay charging protocol is possible.

Here, the charging control server 10 is an expansion module that enables the vehicle's battery management system (BMS) to charge according to the degradation delay charging protocol according to an embodiment of the present invention, based on the vehicle identification information. You can check whether or not it is equipped. And, depending on the inquiry result, it can be determined whether charging according to the degradation delay charging protocol is possible.

In this case, the charging control server 10 connects communication with the electric vehicle 30 corresponding to vehicle identification information and determines whether the electric vehicle 30 is equipped with the expansion module through communication with the electric vehicle 30. It can also be determined. In this case, the charging control server 10 may attempt a direct communication connection with the expansion module, and in this case, whether charging according to the degradation delay charging protocol is possible depending on whether there is a response to the communication connection from the expansion module. It can be determined.

And, as a result of the determination, if charging according to the degradation delay charging protocol according to an embodiment of the present invention is possible, one of a plurality of different degradation delay charging protocols applicable to the identified battery can be determined.

Here, the plurality of different degradation delay charging protocols are based on the method in which the charging current is supplied (CC (Constant Charging) or PC (Pulse Charging)), or the charging current (Charge Current) according to time or state of charge (SOC, State Of Charge). ), at least one of control parameters such as size, current supply (charge duty) or rest duty, and current supply frequency (Frequency) may be different charging protocols. Hereinafter, the different degradation delay charging protocols will be examined in detail with reference to FIGS. 3A to 6B.

Meanwhile, if there is a degradation delay charging protocol applicable to the identified battery, the charging control server 10 supports the charging station 20, where the electric vehicle 30 is currently located, to support the degradation delay charging protocol applicable to the identified battery. It is possible to detect whether it is possible or not.

As an example, the charging control server 10 may include a database containing information about the degradation delay charging protocol that can be supported for each charging station. Based on the database, it is possible to support the degradation delay charging protocol at the charging station 20 where the electric vehicle 30 is currently located, and if support is possible, which of a plurality of different degradation delay charging protocols are supported? You can determine whether this is possible.

As a result of the determination, if the charging station 20 can support the degradation delay charging protocol applicable to the identified battery, the charging control server 10 sends information related to the applicable degradation delay charging protocol to the charging station ( 20) can be provided by sending it to . Here, the information related to the degradation delay charging protocol is the size of the charging current for each stage according to the charging voltage (Cutoff Voltage) or state of charge (SOC), and the same charging current is continuously supplied according to the duty cycle. It may include at least one control parameter such as a current supply (charge duty), a rest duty according to the duty cycle, and a current supply frequency (Frequency). Then, the charging station 20 uses a charging method according to the deterioration delay charging protocol applicable to the identified battery, and charges a charging current having a voltage value and a current value according to at least one control parameter transmitted from the charging control server 10. can be supplied to the battery of the electric vehicle. Therefore, charging current according to the degradation delay charging protocol can be supplied to the electric vehicle 30.

On the other hand, the charging control server 10 determines that charging according to the degradation delay charging protocol is impossible, according to the degradation delay charging protocols that the charging station 20 can support and the degradation delay charging protocol applicable to the identified battery. It can also be determined.

As an example, the deterioration delay charging protocol applicable to the battery model according to the battery identification information is one of the PC-based charging protocols, and the charging station 20 where the electric vehicle 30 is currently located uses the PC-type deterioration delay charging protocol. If support is not possible, the charging control server 10 may determine that charging according to the degradation delay charging protocol is not possible. In this case, when charging according to the deterioration delay charging protocol is not possible, the charging control server 10 may control the charging station 20 so that charging is performed according to a preset basic charging protocol.

In this case, the charging control server 10 may transmit control parameters of the basic charging protocol according to the identified battery to the charging station 20, and the charging station 20 may perform charging according to the basic charging protocol. In this way, a charging current having a voltage value and a current value according to at least one control parameter transmitted from the charging control server 10 can be supplied to the battery of the electric vehicle 30. Here, the basic charging protocol may be CC-CV (Constant Current - Constant Voltage) charging protocol.

Meanwhile, if there is no degradation delay charging protocol corresponding to the obtained vehicle identification information and battery identification information, the charging control server 10 may provide a degradation delay charging protocol applicable to the battery identified according to the battery identification information as described above, and , If charging according to the degradation delay charging protocol is possible based on the degradation delay charging protocols that the charging station 20 where the electric vehicle 30 is currently located can be supported, charging according to any one degradation delay charging protocol may be performed. . Additionally, when charging is performed according to the deterioration delay charging protocol for the identified battery, the charging control server 10 may store the deterioration delay charging protocol through which charging was performed as the charging protocol corresponding to the identified battery. That is, if the electric vehicle 30 corresponding to the vehicle identification information has a history of charging according to the degradation delay charging protocol according to an embodiment of the present invention, the charging control server 10 determines the degradation delay in which the charging occurred. Information about the charging protocol may be stored as a charging protocol corresponding to the vehicle identification information and battery identification information. Therefore, when the electric vehicle 30 is charged again by the charging station 20 in the future, the charging station 20 can detect the deterioration delay charging protocol corresponding to the vehicle identification information and battery identification information. In addition, the detected degradation delay charging protocol and at least one control parameter as information related thereto may be transmitted to the charging station 20 so that charging is performed according to the detected degradation delay charging protocol.

In this way, when the charging station 20 is controlled so that charging is performed according to the charging protocol (deterioration delay charging protocol or basic charging protocol) specified by the charging control server 10, the charging control server 10 controls the electric vehicle 30. Battery status information can be collected. For example, the charging control server 10 may establish a communication connection with the battery management system (BMS) 310 of the electric vehicle 30 and collect battery status information collected under control of the battery management system.

In this case, the collected battery status information is information for determining the deterioration state of the battery, and is the charging state according to the time when charging occurred (hereinafter, charging time) or the size of the supplied current (hereinafter, supply current), the charging time, or It may include at least one piece of information about the amount of increase in battery voltage according to supply current, the change in battery temperature according to the charging time or supply current, and the time required to charge to a preset target voltage.

Then, the charging control server 10 can determine whether the identified battery is deteriorated based on the collected battery state information. For example, the charging control server 10 determines that the lower the charging state and voltage increase of the battery and the greater the temperature change (e.g., temperature increase) of the battery, the higher the degree of battery deterioration, depending on the charging time or supply current. You can. Alternatively, it may be determined that the longer the time required to charge to the target voltage, the higher the degree of battery deterioration. To this end, the charging control server 10 sets at least one reference value corresponding to the identified battery model, for example, a battery state of charge reference value for charging time or supply current, a voltage increase reference value, a temperature change reference value, and a target voltage. The charging time reference value, etc. can be compared with the collected battery state information, and as a result of the comparison, the degree of degradation for the identified battery can be determined according to the difference between the reference values and the collected battery state information. And, according to the determined degree of degradation, at least one control parameter of the deterioration delay charging protocol corresponding to the vehicle identification information and the battery identification information may be updated.

Here, the control parameters may be different depending on the degradation delay charging protocol. For example, the CC (Constant Charging) type deterioration delay charging protocol may include the charging voltage (Cutoff Voltage) or the size of the charging current for each stage according to the state of charge (SOC) as control parameters. On the other hand, in the case of the PC (Pulse Charging) type degradation delay charging protocol, a current supply (charge duty) in which the same charging current is continuously supplied according to the duty cycle, a rest duty according to the duty cycle, and current supply frequency and charging current size, etc. may be included as control parameters. In this case, even if they are the same CC or PC type degradation delay charging protocols, each degradation delay charging protocol may have different control parameters. And the control parameters may be changed according to the determined degree of battery degradation.

For example, the lower the degree of battery degradation, the larger the charging current for each stage can be in the case of the CC-type degradation delay charging protocol. Additionally, in the case of the PC-type degradation delay charging protocol, not only can the size of the charging current be increased, but the current supply time can be longer and the rest period can be shorter. Therefore, the lower the degree of deterioration of the battery, the more current can be supplied to the battery in the same time, and thus the charging time can be shorter.

On the other hand, the higher the degree of battery degradation, the smaller the charging current for each stage may be in the case of the CC-type degradation delay charging protocol. Additionally, in the case of the PC-type degradation delay charging protocol, not only is the size of the charging current smaller, but the current supply time can be shorter and the idle period can be longer. Therefore, the higher the degree of deterioration of the battery, the less current can be supplied to the battery in the same period of time, and thus the longer the charging time can be.

Here, if the determined degree of battery deterioration is above a certain level, the charging control server 10 may determine that rapid charging is impossible and may control the charging station 20 to ensure constant speed charging. In this case, the charging control server 10 establishes a communication connection and provides information on the deterioration state of the battery, thereby informing the driver that the battery of the electric vehicle 30 has deteriorated beyond a certain level, making rapid charging impossible. can be announced.

Then, the charging control server 10 may store updated control parameters according to the degree of deterioration of the identified battery together with information on the deterioration delay charging protocol corresponding to the vehicle identification information and battery identification information. And when charging of the electric vehicle 30 is attempted in the future (e.g., combining the charging terminal of the electric vehicle 30 with the supply terminal of the charging station 20 or the electric vehicle 30 within an area corresponding to the charging station 20 entry), the deterioration delay charging protocol and control parameters corresponding to the vehicle identification information and battery identification information of the electric vehicle 30 can be detected. In addition, the charging station 20 can be controlled to supply charging current to the battery of the electric vehicle 30 in a charging method according to the detected degradation delay charging protocol according to the detected control parameters.

Therefore, the electric vehicle charging control system according to an embodiment of the present invention can not only prevent deterioration of the battery of the electric vehicle 30 in a suitable manner according to the battery model of the electric vehicle 30, but also provide a high-speed charging service. , a customized charging service can be provided according to the battery deterioration state of the electric vehicle 30.

Meanwhile, the charging control server 10 may be configured to include at least one server. Figure 2 below is a block diagram showing the configuration of the charging control server 10, the electric vehicle 30, and the charging station 20 according to an embodiment of the present invention.

As described above, the electric vehicle charging control system according to an embodiment of the present invention includes an electric vehicle 30 having a battery that needs to be charged, a charging station 20 that supplies charging current to the electric vehicle 30, and the charging station. It may include a charging control server 10 that controls (20).

First, an electric vehicle (EV) 30 includes a battery and may include a battery management system (BMS) 310 that manages the battery. Here, the battery management system 310 may support charging according to the degradation delay charging protocol according to an embodiment of the present invention, or may further include a separate expansion module 311 supporting the degradation delay charging protocol. . In this case, the expansion module 311 may be a module that enables both CC-type charging and PC-type charging, and uses charging current according to the degradation delay charging protocol supplied from the charging station 20 to manage the battery. It may be a module that supplies power to the battery in the system 310. Meanwhile, if the battery management system 310 is capable of supporting the degradation delay charging protocol according to an embodiment of the present invention, it may of course not be provided with the expansion module 311.

Additionally, the electric vehicle 30 may include an Electric Vehicle Communication Controller (EVCC) 320 capable of establishing a communication connection with the charging control server 10 or the charging station 20. The communication unit 320 may perform the communication connection using at least one of a preset short-range communication technology or a wireless Internet technology.

In this case, the communication unit 320 uses the wireless Internet technology, for example, WLAN (Wireless LAN), Wi-Fi (Wireless-Fidelity), Wi-Fi (Wireless Fidelity) Direct, DLNA (Digital Living Network Alliance), WiBro ( Wireless Broadband), WiMAX (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access), HSUPA (High Speed Uplink Packet Access), LTE (Long Term Evolution), LTE-A (Long Term Evolution-Advanced), NR (New Radio) and at least one of the wireless Internet technologies not listed above can be used. And the short-range communication technologies include Bluetooth™, Infrared Data Association (IrDA), UWB (Ultra Wideband), ZigBee, NFC (Near Field Communication), Wi-Fi, Wi-Fi Direct, and Wireless USB (Wireless USB). Universal Serial Bus) and at least one of the short-range communication technologies not listed above can be used.

Additionally, the electric vehicle 30 may include a battery state information collection unit 330 that detects the battery state of the battery management system 310 and collects state information of the detected battery. Here, the battery status information is information that can determine the deterioration state of the battery, and is a charging state according to the time when charging occurred (hereinafter, charging time) or the size of the supplied current (hereinafter, supplied current), the charging time, or the supplied current. It may include information on the amount of battery voltage increase according to, battery temperature change according to the charging time or supply current, and the time required to charge to a preset target voltage.

Meanwhile, the charging control server 10 may establish a communication connection with the communication unit 320 of the electric vehicle 30. And through the communication unit 320, the battery identification information of the electric vehicle 30 and the collected battery state information can be received. And based on the received battery identification information and the collected battery state information, a charging protocol with control parameters suitable for the model and battery deterioration degree of the electric vehicle 30 can be created.

For this purpose, as shown in FIG. 2, the charging control server 10 includes a battery management server 110 that manages the battery status of the electric vehicle 30, a charging station management server 120 that manages the charging station, and a charge It may be configured to include a payment server 130.

First, the battery management server 110 may receive battery information including battery identification information or battery status information received from the electric vehicle 30. And, according to the received battery identification information, a deterioration delay charging protocol applicable to the battery of the electric vehicle 30 can be detected. Additionally, the degree of deterioration of the battery of the electric vehicle 30 can be determined according to the received battery status information. And, according to the determined battery degradation state, at least one of the control parameters of the detected degradation delay charging protocol is updated to generate a degradation delay charging protocol having control parameters suitable for the model and battery degradation degree of the electric vehicle 30. You can.

To this end, the battery management server 110 may include a communication unit (not shown) and a battery status diagnosis unit 112 that determines the degree of battery degradation based on the received battery status information. In addition, generating a charging protocol that determines an applicable degradation delay charging protocol according to the received battery identification information and determines control parameters of the determined degradation delay charging protocol according to the battery degradation degree determined by the battery state diagnosis unit 112. It may include unit 111. Here, the configuration of the battery management server 110 shown in FIG. 2 is not essential to the battery management server 110, so the battery management server 110 includes more or fewer components. can do.

Meanwhile, the charging station management server 120 manages a communication unit (not shown), a payment service unit 121 that supports payment services for charging the electric vehicle 30, and at least one charging station 20. A charging station management unit 122 that controls, a charging protocol management unit 123 that stores and manages the charging protocol (e.g., deterioration delay charging protocol) created for the electric vehicle 30 to correspond to the electric vehicle 30, and It may be configured to include a vehicle management unit 124 that manages various information related to the electric vehicle 30, such as vehicle identification information and battery identification information of the electric vehicle 30, and user information or payment information of the electric vehicle 30. there is.

Here, the payment service unit 121 may provide a payment function for payment of a fee corresponding to charging made for the electric vehicle 30 in conjunction with the fee payment server 130. To this end, the payment service unit 121 may provide a payment interface, and send information of the user requesting payment of the charged amount, payment method information, and authentication information to the bill payment server 130 through the payment interface. You can request payment of the transfer and recharge amount. Additionally, in response to the payment request, notification information indicating whether the payment was successful may be received, and the received notification information may be provided to the user who has requested payment of the recharged amount. To this end, the payment service unit 121 may establish a communication connection with the electric vehicle 30 or the user's terminal through the communication unit of the charging station management server 120.

Meanwhile, the charging station manager 122 may be provided with a charging station database that includes information related to a plurality of charging stations (hereinafter referred to as charging station information). Additionally, the charging process for each of the plurality of charging stations managed by the charging station management server 120 can be managed based on information stored in the charging station database.

For example, information related to the charging station may include the location where the charging station is placed, whether each charging station supports the degradation delay charging protocol, and, if supporting the degradation delay charging protocol, what each charging station 20 supports. It may include information about at least one degradation delay charging protocol. Therefore, the charging station 20 connected to the electric vehicle 30 or a charging station adjacent to the electric vehicle 30 is based on information received from the electric vehicle 30 or the charging station 20 (e.g., vehicle identification information and charging station identification information). When (20) is detected, the deterioration delay charging protocol supported by the detected charging station (20) can be detected.

Additionally, the charging station manager 122 may manage a charging process in which the charging station 20 charges the battery of the electric vehicle 30.

As an example, the charging station manager 122 may provide information about the charging protocol that the charging station 20 will use to charge the battery of the electric vehicle 30. In this case, the information about the charging protocol may include a charging protocol and at least one control parameter related to the charging protocol. In this case, the control parameters may include control parameters for generating a charging current and charging voltage to be supplied to the battery of the electric vehicle 30 when the charging station 20 performs charging according to the provided charging protocol. To this end, the charging station management unit 122 may establish a communication connection with a specific charging station (charging station 20) through a communication unit (not shown) of the charging station management server 120.

Additionally, the charging station manager 122 may control the start and end of charging of the charging station 20. For example, the charging station manager 122 may allow the charging station 20 to start charging depending on whether the payment by the payment service unit 121 is successful. Therefore, even if the charging terminal of the electric vehicle 30 and the supply terminal of the charging station 20 are combined, the supply of charging current may begin depending on whether the charging station manager 122 allows charging according to the successful payment. there is.

Additionally, the charging station manager 122 may provide termination condition information for terminating charging of the battery of the electric vehicle 30 to the charging station 20 . Then, when charging of the battery of the electric vehicle 30 begins, the charging station 20 detects whether the termination condition provided by the charging station manager 122 is achieved, and depending on whether the termination condition is achieved, the electric vehicle ( 30) Charging of the battery can be terminated. Here, the termination condition information may include the state of charge (SOC) of the battery, charging voltage, or charging time.

The charging protocol management unit 123 may store a charging protocol corresponding to the charging process performed for the electric vehicle 30. For example, the charging protocol management unit 123 may store the charging protocol (deterioration delay charging protocol or basic charging protocol) used to charge the electric vehicle 30 and control parameters for charging according to the charging protocol. In this case, the stored charging protocol and control parameters may be stored in the form of a database (history information database) associated with vehicle identification information.

Additionally, the charging protocol management unit 123 may include information about each degradation delay charging protocol. In this case, the information on the degradation delay charging protocol may include control parameters and default values of each control parameter. Additionally, each degradation delay charging protocol may include information about at least one battery model that can be supported.

The vehicle management unit 124 may include a database (identification information database) containing at least one vehicle identification information and identification information of a battery installed in the electric vehicle. In this case, the battery identification information may be stored in association with vehicle identification information. In addition, the identification information database may further include user information of each electric vehicle and payment method information of each electric vehicle user, and the user information and payment information may be stored in association with the vehicle identification information like battery identification information.

Accordingly, when vehicle identification information is received, the vehicle management unit 124 can identify the battery provided in the vehicle (electric vehicle 30) (battery identification information) based on the vehicle identification information. In addition, information on the owner of the vehicle (electric vehicle 30) and information on the owner's payment method can be detected based on the vehicle identification information. Or, conversely, when owner information of a specific owner or payment method information of a specific owner is received, the vehicle management unit 124 detects vehicle identification information corresponding to the received owner information or payment method information and responds to the detected vehicle identification information. Battery identification information may also be detected.

Additionally, the vehicle management unit 124 may include information about the battery model corresponding to the battery identification information. Therefore, when battery identification information is received, a battery model corresponding to the received battery identification information can be detected.

Meanwhile, the charging station 20 includes a charging station control unit 200 and a charging module 220 connected to the charging station control unit 200. Department of Communications (210). It may be formed to include a monitoring unit 240 and a control information storage unit 230.

First, the communication unit 210 may be configured to perform a communication connection with at least one of the electric vehicle 30 or the charging station management server 120. The communication unit 210 may receive various information related to vehicle identification information from the electric vehicle 30 through a communication connection with the electric vehicle 30. As an example, the communication unit 210 may receive user information or payment method information for vehicle identification from the electric vehicle 30, and may also receive battery identification information. Additionally, the communication unit 210 may receive control information for the charging station management server 120 to manage the charging station 20 . As an example, the control information may include a specific charging protocol (e.g., degradation delay charging protocol, or basic charging protocol) and at least one control parameter set for the specific charging protocol. For this purpose, the communication unit 210 may use at least one short-range communication technology or at least one wireless communication technology.

And control information received through the communication unit 210, that is, information including a charging protocol, at least one control parameter, and information related to the start and end of charging, may be stored in the control information storage unit 230. .

Meanwhile, the charging module 220 may include a supply terminal coupled to the charging terminal of the electric vehicle 30. In addition to the preset basic charging module, a charging current having a voltage value and a current value according to one of the deterioration delay charging protocols according to an embodiment of the present invention is supplied to the electric vehicle (30) through the supply terminal and the charging terminal coupled to each other. ) can be formed to supply to the battery.

Here, the specific charging protocol may be based on control information received from the charging station management server 120 through the communication unit 210. Additionally, it may be any one of different deterioration delay charging protocols according to an embodiment of the present invention. As an example, the charging module 220 may be configured to supply charging current according to the CC-type degradation delay charging protocol or to supply charging current according to the PC-type degradation delay charging protocol.

Alternatively, the charging module 220 may be configured to support both the degradation delay charging protocol according to the CC method and the degradation delay charging protocol according to the PC method. To this end, the charging module 220 may be provided with a change circuit that can change the charging method according to the charging protocol, and can change the charging method according to either the CC method or the PC method through control of the change circuit according to the charging protocol. It may be changed to support a deterioration delayed charging protocol.

Meanwhile, a plurality of charging modules 220 may be provided in one charging station 20, and each may be controlled by the charging station control unit 200. However, for convenience of explanation, the following description will take one charging module 220 as an example.

And the monitoring unit 240 may input the results of monitoring the charging state of the battery of the electric vehicle 30 to the charging station control unit 200. Then, the charging station control unit 200 can determine whether the monitored battery charging state satisfies the charging termination condition provided by the charging station management server 120. Additionally, the monitoring unit 240 may monitor the charging current supplied to the electric vehicle 30 under the control of the charging station control unit 200 and input the monitoring result to the charging station control unit 200.

Meanwhile, the charging station control unit 200 controls each connected component and can control the overall operation of the charging station 20. The charging station control unit 200 controls the communication unit 210 to establish a communication connection with the electric vehicle 30, and receives vehicle identification information, user information for vehicle identification, or payment method information from the communication-connected electric vehicle 30. can do. Alternatively, battery identification information of the battery provided in the electric vehicle 30 may be received from the communication-connected electric vehicle 30. In addition, the charging station control unit 200 controls the communication unit 210 to establish a communication connection with the charging station management server 120, and receives control information from the charging station management server 120 connected to communication, that is, the charging protocol and the charging protocol. Information related to, that is, control parameters can be received. And the received control information can be stored in the control information storage unit 230. In this case, if there is pre-stored control information corresponding to the same vehicle identification information, the charging station control unit 200 deletes the pre-stored control information and stores the currently received control information as control information corresponding to the vehicle identification information. You can.

Meanwhile, when the control information is stored in the reception and control information storage unit 230, the charging station control unit 200 generates a charging current having voltage and current values according to the charging protocol and control parameters included in the control information for the electric vehicle ( The charging module 220 can be controlled so that it is supplied to 30). In addition, the charging station control unit 200 controls the supplied charging current to have voltage and current values according to the charging protocol and control parameters based on feedback control according to the detection result of the monitoring unit 240. You may. In addition, the charging station control unit 200 detects whether the charging end condition is achieved based on the detection result of the monitoring unit 240, and controls the charging module 220 to end charging when the charging end condition is achieved. You can.

In the above description, the functions and structures of the electric vehicle 30, the charging station 20, and the charging control server 10, which constitute the electric vehicle charging control system according to an embodiment of the present invention, have been described in detail.

Meanwhile, according to the above description, the charging control server 10 according to an embodiment of the present invention performs any one of the degradation delay charging protocols according to the present invention based on the battery model detected according to the battery identification information of the electric vehicle 30. It can be detected. Then, control parameters may be determined according to the detected degradation delay charging protocol, and the determined control parameters and information on the degradation delay charging protocol detected according to the battery model may be transmitted to the charging station 20. Then, the charging station 20 can supply a charging current having a current value and a voltage value according to the degradation delay charging protocol to the battery of the electric vehicle 30 according to the control parameters provided by the charging control server 10. In this case, the control parameter may be determined according to the degree of battery deterioration of the electric vehicle 30.

Hereinafter, with reference to FIGS. 3A to 6, the deterioration delay charging protocol and the basic charging protocol according to an embodiment of the present invention determined according to the model of the battery will be described.

First, Figure 3a is an example diagram showing the CC-CV (Constant Current - Constant Voltage) charging protocol among the charging protocols according to an embodiment of the present invention. The CC-CV charging protocol is a charging protocol (basic charging protocol) set as default in the charging station 20 according to an embodiment of the present invention, when there is no degradation delay charging protocol that can be supported depending on the battery model, or Even if there is a delayed degradation charging protocol that can be supported depending on the battery model, it may be a charging protocol used when the charging station 20 does not support the delayed degradation charging protocol.

Referring to FIG. 3A, FIG. 3A shows a change in the magnitude of the charging current (A) over time and a change in the battery voltage (V) over time when charging is performed according to the CC-CV charging protocol.

Looking at the first graph 410 showing the change in the magnitude (A) of the charging current over time, in the case of the CC-CV charging protocol, when the battery voltage reaches a preset voltage (cutoff voltage) It can be seen that a large current is supplied consistently up to (CC section), and when the battery voltage reaches a preset voltage, the amount of charging current supplied is reduced according to the battery voltage (CV section).

In other words, the CC-CV charging protocol is a charging method that increases the charging speed by continuously supplying a large amount of current until the battery voltage reaches a preset voltage. As shown in the CC section, a large amount of current of a certain size is supplied. It can be supplied continuously for a certain period of time.

When a large amount of current with a constant size is supplied continuously, the charging speed may increase, but the load applied to the battery separator may continue to increase, which may accelerate deterioration of the battery.

Meanwhile, in order to prevent deterioration of the battery separator that occurs when a constant amount of current is continuously supplied, a charging method that gradually reduces the load on the separator by gradually reducing the charging current can be considered. In this case, a large current value is initially supplied, but the current value is gradually reduced, thereby gradually reducing the load on the separator. In this case, the load on the separator can be alleviated compared to charging in the CC section where a large amount of current is continuously supplied, and thus battery deterioration can be delayed.

Figure 3b shows an example of MSCC (Multi Stage Constant Current) - CV (Constant Voltage) deterioration delay charging protocols according to an embodiment of the present invention, which delays battery deterioration by gradually reducing the size of the supplied charging current. This is an example diagram.

The MSCC-CV type degradation delay charging protocol is a CC (Constant Charging) type charging protocol among the degradation delay charging protocols according to an embodiment of the present invention, and may be a charging protocol in which current is continuously supplied for a certain period of time. However, the MSCC-CV type degradation delay charging protocol gradually reduces the amount of charge applied to the battery separator by gradually reducing the size of the charging current according to preset conditions, as shown in (a) and (b) of Figure 3b. As a relaxation, the charging method of the CC (Constant Current) section of the CC-CV charging protocol of FIG. 3a may be changed.

Meanwhile, with the MSCC-CV charging protocol, a larger current may be supplied than the current supplied in the CC (Constant Current) section of the CC-CV method at the beginning of charging. However, it has the characteristic that the magnitude of the charging current gradually decreases. And when the battery voltage reaches a certain level of voltage (cut-off voltage), charging can continue according to the CV (Constant Voltage) charging method of the existing CC-CV charging protocol.

In the case of this MSCC-CV type degradation delay charging protocol, stage change conditions in which the size of the charging current is changed and the size of the charging current for each stage may be required as control parameters. Figure 3b shows two examples of this MSCC-CV charging protocol.

First, referring to (a) of FIG. 3B, (a) of FIG. 3B is an example of the MSCC charging section of the SOC-based MSCC-CV charging protocol in which the size of the charging current gradually decreases depending on the state of charge (SOC) of the battery. is showing. In this case, the change condition of each stage may be a constant value of SOC, and in the case of (a) of Figure 3b, the charging current may be lowered every time the battery state of charge increases by 25%.

In this case, the control parameters of the SOC-based MSCC-CV charging protocol can be set to SOC 25% based on stage switching, the number of stages can be 4, and the maximum current value for each stage can be set. Then, in the charging station 20 of FIG. 2, the charging station control unit 200 controls the charging module 220 according to the monitoring results of the monitoring unit 240 to gradually increase the charging current whenever the SOC increases by 25%. can be reduced to Therefore, as shown in the first graph 410 shown in (a) of FIG. 3B, a charging current that is gradually reduced according to the SOC can be supplied to the battery of the electric vehicle 30. And when the battery voltage reaches a preset voltage (cut-off voltage), the size of the charging current can be reduced so that the battery voltage can be maintained in the same way as the charging method in the CV section of the CC-CV charging protocol in Figure 3a. there is.

Meanwhile, Figure 3b (b) shows an example of the battery voltage-based MSCC-CV charging protocol in which the charging current is gradually reduced based on the charging voltage of the battery rather than the state of charge (SOC) of the battery.

In this case, the change condition for each stage may be the voltage of the battery currently being charged, and in this case, the voltage of the battery may be a cut-off voltage. Therefore, as shown in (b) of FIG. 3B, the charging current may be lowered whenever the voltage of the battery being charged according to the charging current reaches a preset voltage (cut-off voltage).

In this case, the control parameter of the MSCC-CV charging protocol based on the battery voltage may be a preset battery voltage (cut-off voltage), the number of stages may be set to 4, and the maximum current value for each stage may be set. Then, in the charging station 20 of FIG. 2, the charging station control unit 200 controls the charging module 220 according to the monitoring result of the monitoring unit 240 to ensure that the voltage of the battery being charged reaches the cut-off voltage. Each time, the charging current can be reduced step by step. Therefore, as shown in the first graph 410 shown in (b) of FIG. 3B, a charging current that is gradually reduced can be supplied to the battery of the electric vehicle 30. And when the current is reduced by the number of stages set according to the control parameter, the size of the charging current can be reduced so that the battery voltage can be maintained in the same way as the charging method of the CV section in the CC-CV charging protocol of FIG. 3A.

Meanwhile, in FIGS. 3A and 3B described above, a charging method in which charging current is continuously supplied in the CC (Constant Current) section was explained. However, unlike this, the battery of the electric vehicle 30 can be charged by supplying current in pulse form using a duty cycle. In this case, since there is a rest duty in which current supply is lowered or no current is supplied between current suppliers (charge duties), the load on the battery separator can be alleviated due to the rest duty.

Figure 4a is an example diagram showing a PC (Pulse Charging) type charging protocol among the degradation delay charging protocols according to an embodiment of the present invention.

Referring to FIG. 4A, the PC-type charging protocol may be a change in the charging method of the CC (Constant Current) section from the CC-CV charging protocol shown in FIG. 3A.

In this case, the PC-type charging protocol can supply charging current in pulse form. Here, a preset first charging current may be supplied to the charge duty cycle of the pulse, and a second charging current may be supplied to the rest duty period. And the first charging current may be greater than the second charging current.

Meanwhile, the PC-type charging protocol supplies current in the form of pulses (PC section) until the battery voltage reaches a preset voltage (cutoff voltage), and the battery voltage reaches the preset voltage. In this case, it may be a charging method that reduces the size of the charging current supplied according to the battery voltage (CV section). In this case, the charging current (Ip) can be kept constant.

Additionally, considering that no charging current is supplied or less current is supplied during the idle period, the first charging current may have a larger value than the charging current supplied in the CC section of the existing CC-CV charging protocol. Therefore, charging can be done the same or faster than the charging speed of the CC-CV charging protocol.

Meanwhile, in the case of the PC-type charging protocol, current is supplied in the form of pulses according to the current supply frequency, so there may be a rest period according to the duty cycle for each current pulse. In this case, the rest period may be a time when a current that is significantly lower than the current supplied in pulse form is supplied. Alternatively, the rest period may be a state in which no current is supplied, or rather a time for discharging the charged current.

Figure 4b shows that among the PC-type degradation delay charging protocols according to an embodiment of the present invention, the current supplied in a pulse manner is constant and the current supply frequency is constant (CCCF-PC (Constant Current and Constant Frequency - Pulse Charging) ) This is an example diagram showing examples of charging protocols.

Referring to FIG. 4B, in (a) to (c) of FIG. 4B, the amount of current supplied in the form of a pulse can be maintained constant. However, it can be classified into different types of charging protocols depending on whether current is supplied or current is discharged during the rest period according to the duty cycle.

First, (a) of FIG. 4B shows the CCCF-PC charging protocol in which current is not supplied during the rest period according to the duty cycle. In this case, there may be a pause in which no current is supplied between currents supplied in pulse form. And in the case of the rest period, since charging current is not supplied, the load on the battery separator can be alleviated. Accordingly, battery deterioration can be alleviated.

In the case of the CCCF-PC charging protocol as shown in (a) of Figure 4b, since charging current is not supplied during the rest period, the control parameters are the size of the current to be supplied in pulse form and the current supply according to the duty cycle ( Charge duty and rest duty may be required.

Meanwhile, Figure 4b (a) shows an example of the CCCF-PC charging protocol in which a small amount of charging current is supplied, unlike the case where no current is supplied during the rest period according to the duty cycle. In this case, although charging current is supplied during the rest period, a smaller current than the current supplied in pulse form is supplied, so the load on the battery separator can be alleviated. Accordingly, battery deterioration can be alleviated.

In the case of the CCCF-PC charging protocol as shown in (b) of Figure 4b, charging current can be supplied even during the rest period. Therefore, the control parameters may further require the size of the current to be supplied in pulse form, the current supply time (charge duty), and the rest duty, as well as the size of the current to be supplied during the rest period.

Meanwhile, the CCCF-PC type degradation delay charging protocol according to an embodiment of the present invention may allow some of the charged current to be discharged during the rest period. In this case, a certain amount of current is discharged during the rest period, so the battery separator can be restored. Accordingly, battery deterioration can be alleviated to a greater extent.

Meanwhile, in the case of the CCCF-PC charging protocol shown in (c) of Figure 4b, a small amount of current may be discharged during the rest period. Therefore, the control parameters may further require the size of the current to be supplied in pulse form, the current supply (charge duty) and rest duty according to the duty cycle, as well as the size of the current to be discharged during the rest period.

Meanwhile, unlike what was seen in FIG. 4b, it goes without saying that the size or current supply frequency of the current supplied in a pulse manner may vary. Figure 5 shows the PC-type degradation delay charging protocol (CCVF (Constant Current and Variable Frequency) - PC (Pulse Charging)) in which the current supply frequency varies among the PC-type degradation delay charging protocols according to an embodiment of the present invention. This is an example diagram showing an example of a PC-type degradation delay charging protocol (Variable Current and Constant Frequency (VCCF)-PC) in which the size of the current varies.

First, referring to FIG. 5(a), in FIG. 5(a) the magnitude of the current supplied in the form of a pulse is the same, but the current supply is different according to the frequency and duty cycle of the current supplied in the form of the pulse. An example of the protocol (CCVF-PC) is shown. In the case of the CCVF-PC charging protocol where the frequency and supply of current supplied in the form of pulses are different, the size of the constant current supplied in the form of pulses, the constant rest duty between pulses, and a plurality of different A current supply (charge duty) may be required as a control parameter.

On the other hand, Figure 5(b) shows an example of a charging protocol (VCCF-PC) where the frequency at which current is supplied is the same, but the size of the current supplied in the form of a pulse is different. In the case of the VCCF-PC charging protocol where the size of the current supplied in the form of pulses is different, a constant current supply according to the duty cycle (charge duty), a constant rest duty, and a plurality of different pulse forms are supplied. The magnitude of the current may be required as a control parameter.

Meanwhile, in the above description, the current is supplied in a multi-stage or pulse form according to the battery model corresponding to the battery identification information, and the supply frequency and duty cycle of the supplied current are determined. Examples of various degradation delay charging protocols, such as cycle, rest duty or charge duty according to the duty cycle, and size of current supplied during the supply or rest period, are described. However, of course, it is also possible to create a deterioration-delayed charging protocol by modulating the voltage of the charging current.

Figure 6 shows a PC-type deterioration delay charging protocol according to an embodiment of the present invention in which the voltage of the charging current is modulated in this way, including a DVV-PC (Duty Varied Voltage - Pulse Charging) charging protocol and VFV-PC (Variable Frequency Voltage - PC) ) shows the charging protocol.

First, the PC (Pulse Charging) type degradation delay charging protocol according to an embodiment of the present invention may include a charging protocol that changes the voltage of the supplied charging current into a pulse form according to a preset duty cycle. In this case, a charging current according to a preset first charging voltage will be supplied to a charge duty cycle different from the duty cycle, and a charging current according to a preset second charging voltage will be supplied to a rest duty different from the duty cycle. You can. In this case, the first charging voltage may be higher than the second charging voltage.

In the deterioration delayed charging protocol in which the voltage of the charging current is changed in the form of a pulse, the charging station 20 can detect the duty cycle most suitable for the current charging state of the battery of the electric vehicle 30. For example, at regular intervals, the charging state of the battery is checked (first section), the duty cycle most suitable for the current battery charging state is detected (second section), and for the remaining time of the constant time (third section) ) A charging current having a voltage that changes according to the detected duty cycle can be supplied to the electric vehicle 30. And you can repeat this.

Here, the charging station 20 changes the voltage of the charging current according to a plurality of different duty cycles during the second period and calculates battery charging rates corresponding to the charging voltages that change according to each duty cycle, Among the calculated battery charge rates, the duty cycle with the highest battery charge rate can be detected.

In this way, the charging protocol that detects the duty cycle most suitable for the charging state of the electric vehicle 30 battery and supplies charging current with a voltage modulated according to the detected duty cycle is called the DVV-PC (Duty Varied Voltage - Pulse Charging) charging protocol. I decided to do it.

Meanwhile, in the deterioration delayed charging protocol in which the voltage of the charging current is changed in the form of a pulse, the modulation frequency most suitable for the current charging state of the battery of the electric vehicle 30 can be detected. For example, the charging state of the battery is checked at regular intervals (first section), the modulation frequency most suitable for the current battery charging state is detected (second section), and the remaining time (third section) during the certain period of time is detected. During this time, a charging current having a voltage that changes according to the detected modulation frequency can be supplied to the electric vehicle 30.

Here, the charging station 20 changes the voltage of the charging current according to a plurality of different voltage modulation frequencies during the second period, and calculates and calculates averages of the amount of charging current supplied to the battery according to each voltage modulation frequency. The voltage modulation frequency having the maximum value among the average charging current amounts can be detected.

In this way, the charging protocol that detects the modulation frequency most suitable for the charging state of the electric vehicle 30 battery and supplies charging current with a voltage modulated according to the detected modulation frequency is called the VFV-PC (Varied Frequency Voltage - Pulse Charging) charging protocol. I decided to do it.

Referring to FIG. 6, first, (a) of FIG. 6 shows the charging voltage of the charging current supplied according to the DVV-PC charging protocol and the charging factor of the battery according to the supplied charging current. It is shown.

Referring to (a) of FIG. 6, the preset charging cycle includes an FDCM (Full Charge Detect Mode) section that detects the charging state of the battery, an SM (Sense Mode) section that detects an appropriate duty cycle, and a detected duty cycle. It may include a CM (Charge Mode) section that supplies charging current with a voltage modulated accordingly. Here, the FDCM section may be a section in which the monitoring unit 240 of the charging station 20 detects the charging state of the battery of the electric vehicle 30. Additionally, the SM section may be a section in which the duty cycle is changed and the charging rate according to each different duty cycle is detected.

Meanwhile, as shown in (a) of FIG. 6, when the voltage is modulated according to different duty cycles in the SM section, the charging rate may vary. And the section 600 with the highest charging rate may be detected according to at least one of the battery model and the charging state of the battery. Then, the charging station 20 can detect the duty cycle corresponding to the section 600 in which the highest charging rate was detected. Additionally, a charging current having a voltage modulated according to the duty cycle corresponding to the highest charge rate detection section 600 may be supplied to the battery of the electric vehicle 30 during the CM section. Therefore, as shown in the charging factor (Pulse Charging factor) graph in (a) of FIG. 6, in the CM section, the duty cycle with the highest charging factor is modulated according to the battery model of the electric vehicle 30 and the charging state of the battery. A charging current having a given voltage may be supplied.

In the case of this DVV-PC type degradation delay charging protocol, the time corresponding to each section, the time values corresponding to the current supply (charge duty) and rest duty according to the duty cycle, and the supply and rest period Voltage values may be required as control parameters.

Meanwhile, in (a) of FIG. 6 above, the charging station 20 detects the duty cycle most suitable for the current charging state of the battery of the electric vehicle 30 and explains the degradation delay charging protocol in which the battery is charged accordingly. Of course, it is also possible to detect the modulation frequency most suitable for the current charging state of the electric vehicle 30 battery and supply a charging current with a voltage modulated according to the modulation frequency (VFV-PC charging protocol).

Figure 6(b) shows an example of the VFV-PC degradation delay charging protocol.

Referring to (b) of FIG. 6, the VFV-PC charging protocol may also have a charging cycle including an FDCM section, an SM section, and a CM section. Here, the FDCM section may be a section for detecting the charging state of the battery, and the SM section may be a section for detecting an appropriate modulation frequency. And the CM section may be a section in which charging current is supplied with a voltage modulated according to the detected modulation frequency. Here, in the case of the VFV-PC charging protocol, unlike the DVV-PC charging protocol, the frequency at which the charging voltage is changed is changed, so that the average charge current is the largest among the different modulation frequencies. This may be a section where frequency is detected.

Meanwhile, as shown in (b) of FIG. 6, when the voltage changes according to different modulation frequencies in the SM section, the average charging current may vary. Additionally, a section 610 with the highest average charging current may be detected according to at least one of the battery model and the charging state of the battery. Then, the charging station 20 can detect the modulation frequency corresponding to the section 610 in which the largest average charging current is detected. Additionally, a charging current whose voltage is modulated according to the modulation frequency corresponding to the section 610 in which the largest average charging current is detected can be supplied to the battery of the electric vehicle 30 during the CM section. Therefore, as shown in the average charge current graph in (b) of FIG. 6, in the CM section, the average charge current is modulated to the maximum depending on the battery model of the electric vehicle 30 and the charging state of the battery. A charging current having a voltage modulated by frequency may be supplied.

In the case of this VFV-PC type degradation delay charging protocol, the time corresponding to each section, voltage values according to the current supply (charge duty) and rest duty according to the duty cycle, and modulation frequency are required as control parameters. It can be.

Meanwhile, in the above description, we have looked at the electric vehicle charging control system according to an embodiment of the present invention and the deterioration delay charging protocols that generate charging current or charging voltage to delay battery deterioration in the electric vehicle charging control system according to an embodiment of the present invention. .

In the following description, the operation process of charging the battery of an electric vehicle according to any one of the degradation delay charging protocols or the basic charging protocol in the electric vehicle charging control system according to the embodiment of the present invention will be described in detail with reference to a plurality of flowcharts. Let's take a look.

FIG. 7 is a flowchart illustrating an operation process in which charging is performed according to a degradation delay charging protocol corresponding to the battery of the identified electric vehicle 30 in the electric vehicle charging control system according to an embodiment of the present invention.

Referring to FIG. 7 , the charging control server 10 may receive at least one of vehicle identification information and battery identification information from at least one of the charging station 20 or the electric vehicle 30 (S700, S701).

As an example, the charging control server 10 may receive vehicle identification information of the electric vehicle 30 from the charging station 20 or the electric vehicle 30. Additionally, it is possible to search whether there is an electric vehicle corresponding to the received vehicle identification information through the identification information database provided in the vehicle management unit 124 (S702). And, if there is a searched electric vehicle as a result of the search, that is, the charging protocol corresponding to the searched electric vehicle can be detected (S704).

For example, if the searched electric vehicle 30 has a charging history according to the deterioration delayed charging protocol or the basic charging protocol according to an embodiment of the present invention, the searched electric vehicle and the charging protocol applied when charging the electric vehicle are determined by the vehicle management unit. It can be stored at (124). Therefore, when an electric vehicle is searched according to the vehicle identification information, the charging protocol applied to the electric vehicle in the past can also be detected.

And the charging control server 10 may transmit information related to the detected charging protocol to the charging station 20 (S706). Therefore, if the searched electric vehicle 30 has a charging history according to the deterioration delayed charging protocol, information related to the deterioration delayed charging protocol is provided, and if the searched electric vehicle 30 has a charging history according to the basic charging protocol, information related to the basic charging protocol can be transmitted to the charging station 20.

However, if there is no previous charging history according to the deterioration delayed charging protocol or the basic charging protocol according to the embodiment of the present invention, the vehicle identification information of the electric vehicle 30 received from the charging station 20 or the electric vehicle 30 The corresponding electric vehicle may not be found. Then, the charging control server 10 may request battery identification information of the electric vehicle 30 from at least one of the charging station 20 or the electric vehicle 30 and receive the battery identification information in response to the request.

However, if there is no previous charging history according to the deterioration delayed charging protocol or the basic charging protocol according to an embodiment of the present invention, the charging protocol applied to the electric vehicle may also not be detected. Therefore, in step S704, the charging control server 10 detects a battery model corresponding to the received battery identification information, and detects one of a plurality of degradation delay charging protocols or a basic charging protocol based on the detected battery model. can do. And the detected charging protocol can be transmitted to the charging station 20 in step S706.

In this case, the charging control server 10 may store information including vehicle identification information and battery identification information transmitted from the charging station 20 and the electric vehicle 30 in an identification information database. Additionally, in association with the vehicle identification information, the charging protocol transmitted to the charging station 20 and information (e.g., control parameters) related to the transmitted charging protocol may be stored in the history information database. In this case, the identification information database may be provided in the vehicle management unit 124, and the history information database may be provided in the charging protocol management unit 123.

Meanwhile, the charging control server 10 may determine whether to replace the battery of the electric vehicle 30 based on vehicle identification information and battery identification information from at least one of the electric vehicle 30 or the charging station 20.

For example, when vehicle identification information is received, the charging control server 10 may search for battery identification information of an electric vehicle corresponding to the received vehicle identification information through the identification information database of the vehicle management unit 124. Additionally, the searched battery identification information may be compared with the battery identification information received from at least one of the electric vehicle 30 or the charging station 20. And, if the battery identification information is the same as a result of the comparison, any one charging protocol according to the charging history of the searched electric vehicle 30 can be detected. On the other hand, if the battery identification information is different as a result of the comparison, the charging history of the searched electric vehicle 30 is ignored, and one of a plurality of degradation delay charging protocols or basic charging is performed based on the battery model corresponding to the received battery identification information. Protocol can be detected. Additionally, information related to the detected charging protocol may be transmitted to the charging station 20 in step S706.

Meanwhile, the information related to the charging protocol transmitted to the charging station in step S706 may include information on the charging protocol detected in step S704 and control parameters of the detected charging protocol. Here, the control parameters may be control parameters stored along with information on a specific charging protocol according to the charging history of the searched electric vehicle 30. In this case, the control parameters may reflect the degree of battery deterioration of the electric vehicle 30 (if there is a charging history). Alternatively, it may be a control parameter set as default to a specific charging parameter detected according to the battery model of the electric vehicle 30 (if there is no charging history). Control parameters of each charging protocol may include the following information.

For example, if the detected charging protocol is the CC-CV protocol, which is a basic charging protocol, the charging station 20 may transmit the maximum charging current value to the charging station 20 as a control parameter.

Meanwhile, if the detected charging protocol is the SOC-based MSCC-CV charging protocol, which is a deterioration delayed charging protocol, the charging station 20 uses the stage switching standard (SOC), the number of stages, and the maximum current value for each stage as control parameters. It can be transmitted to the charging station 20.

And if the detected charging protocol is the battery voltage-based MSCC-CV charging protocol, which is a deterioration delayed charging protocol, the charging station 20 determines the preset battery voltage (cut-off voltage), the number of stages, and the maximum current value for each stage. Can be transmitted to the charging station 20 as a control parameter.

Alternatively, in the case of the CCCF-PC type deterioration delay charging protocol in which the detected charging protocol modulates the current in the form of a pulse, the size of the current to be supplied in the form of a pulse, the current supply (charge duty) and the rest duty according to the duty cycle. ) can be transmitted as a control parameter. Additionally, when supplying or discharging current to the resting period, the size of the current to be supplied during the resting period or the size of the current to be discharged during the resting period can be further transmitted to the charging station 20 as a control parameter.

Alternatively, if the detected charging protocol is a CCVF-PC type degradation delay charging protocol that modulates current in the form of pulses, the charging control server 10 may determine the size of a constant current supplied in the form of pulses and a constant constant between pulses. Information on rest duty and a plurality of different current suppliers (charge duty) can be transmitted to the charging station 20 as control parameters.

Alternatively, if the detected charging protocol is a VCCF-PC charging protocol that modulates current in the form of a pulse, the charging control server 10 provides a constant current supply according to the duty cycle (charge duty) and a constant rest duty. And the magnitude of the current supplied in the form of a plurality of different pulses can be transmitted to the charging station 20 as a control parameter.

Meanwhile, in the case where the detected charging protocol is a DVV-PC type degradation delay charging protocol that modulates the voltage in the form of a pulse, the time corresponding to each section and the current supply (Charge duty) according to each of a plurality of different duty cycles and time values corresponding to rest duty, and voltage values of the supply and rest duty can be transmitted to the charging station 20 as control parameters.

In addition, in the case where the detected charging protocol is a VFV-PC type degradation delay charging protocol that modulates the voltage in the form of a pulse, the current supply (charge duty) and rest duty according to the time and duty cycle corresponding to each section Voltage values and a plurality of different modulation frequencies can be transmitted to the charging station 20 as control parameters.

Meanwhile, the charging station 20, which has received information about a specific charging protocol and control parameters for the specific charging protocol, can check whether the battery of the electric vehicle 30 can be charged (S708). As an example, step S708 may be a step of determining whether a preset charging start condition is met. In this case, the charging start condition may be determined including the connection state of the charging terminal of the electric vehicle 30 and the supply terminal of the charging station 20.

As a result of the check in step S708, if the charging conditions for the electric vehicle 30 are met, the charging station 20 supplies charging current to the electric vehicle 30 according to the specific charging protocol and control parameters received in step S706. (S710). Therefore, a charging current in which the current or voltage is modulated in the form of a pulse (PC type deterioration delay charging protocol), or a charging current in which the current value is sequentially lowered (MSCC type deterioration delay charging protocol) will be supplied to the electric vehicle 30. (S712).

Then, the electric vehicle 30 can charge the battery based on the supplied charging current. And when the battery is being charged, battery status information can be measured. Here, the battery status information is used to calculate the degree of battery deterioration, the charging state according to the charging time (hereinafter, charging time) or the size of the supplied current (hereinafter, supplied current), and the charging state according to the charging time or supplied current. It may include at least one piece of information about the amount of battery voltage increase, battery temperature change according to the charging time or supply current, and the time required to charge to a preset target voltage. And the measured battery state information can be transmitted to the charging control server 10 (S716). To collect such battery state information, the charging control server 10 may request the measured battery state information from the electric vehicle 30.

Battery state information measured in the electric vehicle 30 through step S716 may be collected in the charging control server 10. Then, the charging control server 10 can calculate the degree of deterioration of the battery of the electric vehicle 30 based on the collected battery state information. And according to the calculated degree of deterioration, the deterioration state of the battery of the electric vehicle 30 previously stored in relation to vehicle identification information can be updated (S718). And when the deterioration state of the battery is updated, the charging control server 10 may update the control parameters of the charging protocol corresponding to the battery of the electric vehicle 30 according to the updated deterioration state of the battery (S720).

For example, the charging control server 10 determines that the lower the charging state and voltage increase of the battery and the greater the temperature change (e.g., temperature increase) of the battery, the higher the degree of battery deterioration, depending on the charging time or supply current. You can. Alternatively, it may be determined that the longer the time required to charge to the target voltage, the higher the degree of battery deterioration.

To this end, the charging control server 10 sets at least one reference value corresponding to the identified battery model, for example, a battery state of charge reference value for charging time or supply current, a voltage increase reference value, a temperature change reference value, and a target voltage. The charging time reference value, etc. can be compared with the collected battery status information. Additionally, the degree of deterioration of the identified battery can be calculated based on the difference between the reference values and the collected battery state information.

To calculate this degree of deterioration, the charging control server 10 may set weights according to each of a plurality of different battery states. Additionally, the degree of degradation corresponding to the battery state can be calculated based on the differences between each measured battery state and the corresponding reference value, and the weights set for each of the different battery state information. And at least one control parameter of the charging protocol corresponding to the vehicle identification information and the battery identification information may be updated according to the calculated degree of degradation.

Additionally, the charging control server 10 may store charging protocol information including updated control parameters (e.g., history information database) in association with the vehicle identification information (S722).

Therefore, when the electric vehicle 30 corresponding to the vehicle identification information received by the charging control server 10 is charged according to one of the charging protocols according to an embodiment of the present invention, the state of the battery measured during the charging process The degree of deterioration can be calculated according to . Additionally, information on the one charging protocol and control parameters related to the one charging protocol updated according to the calculated degree of degradation may be stored in association with the vehicle identification information.

Therefore, when the electric vehicle 30 is charged again later, the charging control server 10 can detect one of the charging protocols in steps S702 and S704. Accordingly, information on one of the charging protocols and control parameters according to the battery deterioration state of the electric vehicle 30 can be transmitted to the charging station 20, and the control parameters and charging according to the one of the charging protocols It can be done.

Meanwhile, here, one of the charging protocols may be a deterioration delay charging protocol according to the battery model corresponding to the identification information of the battery of the electric vehicle 30. Therefore, the electric vehicle charging control system according to an embodiment of the present invention can provide a customized fast charging service that can minimize battery deterioration based on the battery model and battery deterioration state.

Meanwhile, in the above description, if there is a charging history according to the deterioration delayed charging protocol or the basic charging protocol according to the embodiment of the present invention, any one charging protocol according to the charging history is detected in step S704, and in step S706 The explanation was given as an example of transmitting information related to the detected charging protocol to the charging station 20.

However, even if the battery model is capable of applying a specific degradation delay charging protocol, if the charging station 20 does not support charging according to the specific degradation delay charging protocol, charging according to the basic charging protocol may be supported. In this case, even if the battery model is capable of charging according to the delayed degradation charging protocol, there is a problem that charging can only be performed according to the basic charging protocol due to the charging history.

Accordingly, the charging control server 10 searches the charging history of the electric vehicle corresponding to the vehicle identification information, and if charging was performed according to the basic charging protocol, in step S704, the battery of the electric vehicle corresponding to the vehicle identification information A process of detecting a degradation delay charging protocol corresponding to the model may be further performed. And, if a specific degradation delay charging protocol corresponding to the battery model is detected as a result of the detection, information related to the specific degradation delay charging protocol may be transmitted to the charging station 20 instead of the charging protocol according to the charging history in step S706. Of course.

Here, the charging control server 10 may determine control parameters according to the detected degradation delay charging protocol based on the degree of battery degradation calculated according to the battery state information of the electric vehicle collected in the previous charging process. In this case, the default control parameters may be changed to values according to the degree of battery deterioration. Then, the charging control server 10 may transmit information on the specific degradation delay charging protocol and control parameters according to the degree of battery degradation to the charging station 20. Then, the charging station 20 can supply a charging current having a voltage or current generated in a manner according to the specific degradation delay charging protocol to the battery of the electric vehicle 30, based on control parameters according to the degree of battery degradation. .

FIG. 8 is a flowchart showing in more detail the operation process of the charging control server 10 that detects the charging protocol corresponding to the battery of the electric vehicle 30 identified during the operation process of FIG. 7.

Referring to FIG. 8, the charging control server 10 according to an embodiment of the present invention determines whether there is a charging protocol corresponding to the vehicle identification information received from the charging station 20 or the electric vehicle 30 and whether it is stored. You can do it (S800). And, as a result of the determination in step S800, if the charging protocol corresponding to the vehicle identification information is pre-stored, the pre-stored charging protocol can be detected as a charging protocol according to the received vehicle identification information (S810). Then, the previously stored charging protocol and information related to the protocol (e.g., control parameters) may be transmitted to the charging station 20 in step S706 of FIG. 7.

On the other hand, as a result of the determination in step S800, if the charging protocol corresponding to the vehicle identification information is not stored, the charging control server 10 identifies the battery model of the electric vehicle 30 corresponding to the vehicle identification information. Information can be received (S801). Here, the battery identification information may be provided directly from the electric vehicle 30 corresponding to the vehicle identification information, or may be received from a charging station 20 connected to the electric vehicle 30 corresponding to the vehicle identification information. To this end, the charging control server 10 may request battery identification information of the electric vehicle 30 corresponding to the vehicle identification information from the charging station 20 or the electric vehicle 30, and provide the battery identification information in response to the request. can receive.

Then, the charging control server 10 may detect whether there is a degradation delay charging protocol applicable to the battery model corresponding to the received battery identification information, based on the battery identification information received in step S801 (S802). .

In step S802, the charging control server 10 may include information on battery models corresponding to different battery identification information (for example, vehicle management unit 124). And based on the information about the battery model, the battery model corresponding to the battery identification information can be identified. And, based on battery models that each degradation delay charging protocol can support, it can be detected whether there is a degradation delay charging protocol applicable to the battery model corresponding to the currently received battery identification information. Here, information on battery models that can be supported by each of the degradation delay charging protocols may be stored in the charging protocol management unit 123.

As a result of the detection in step S802, if there is no degradation delay charging protocol applicable to the battery model corresponding to the received battery identification information, the charging control server 10 uses the basic charging protocol to charge the battery corresponding to the currently received vehicle identification information. It can be detected by protocol (S808). Here, the basic charging protocol may be the CC-CV charging protocol.

However, as a result of the detection in step S802, if there is a degradation delay charging protocol applicable to the battery model corresponding to the received battery identification information, the charging control server 10 applies any one of the applicable degradation delay charging protocols to the electric vehicle ( It can be determined by the charging protocol corresponding to the battery in 30) (S804).

Here, of course, there may be a plurality of degradation delay charging protocols applicable to the battery model. In this case, the charging control server 10 may determine one degradation delay charging protocol according to a preset method. As an example, the charging control server 10 may determine one degradation delay charging protocol according to a preset priority. Alternatively, the charging control server 10 may determine one of a plurality of degradation delay charging protocols applicable to the battery model according to the state of the battery. To this end, the charging control server 10 may include information on different application priorities of degradation delay charging protocols based on the battery model or degree of degradation.

If the charging protocol corresponding to the battery of the electric vehicle 30 is determined in step S804, the charging control server 10 may detect control parameters of the determined deterioration delay charging protocol (S806). In this case, the control parameters may have default values. Additionally, the detected control parameters and information on the deterioration delay charging protocol determined by the charging protocol may be transmitted to the charging station 20 in step S706 of FIG. 7 . And the detected charging protocol and the detected control parameters can be stored in association with vehicle identification information (S807).

FIG. 9 is a flowchart showing in more detail the operation process of the charging station 20 that generates and supplies charging current according to the charging protocol corresponding to the battery of the identified electric vehicle 30 during the operation process of FIG. 7.

Referring to FIG. 9, when charging protocol information and control parameters are received from the charging control server 10, the charging station 20 of the electric vehicle charging control system according to an embodiment of the present invention responds to the received charging protocol information. A charging current having a current value or voltage value according to the charging protocol and received control parameters can be generated (S900).

For example, if the received charging protocol is a basic charging protocol, the charging station 20 may generate a charging current of a constant value according to the CC-CV charging protocol. However, if the received charging protocol is a degradation delay charging protocol, the charging station 20 uses a charging current (SOC-based MSCC degradation delay charging protocol or battery voltage-based MSCC degradation delay charging protocol) with a gradually decreasing current value. A charging current with a current or voltage value generated or modulated in the form of a pulse with a constant value (CCCF-PC deterioration delayed charging protocol, CCVF-PC deterioration delayed charging protocol, VCCF-PC deterioration delayed charging protocol, DVV-PC deterioration Delayed charging protocol or VFV-PC degradation delayed charging protocol) can be created. And the generated charging current can be supplied to the electric vehicle 30 (steps S902 and S712 of FIG. 7).

And when the generated charging current is supplied to the electric vehicle 30, the charging station 20 can check the state of the battery of the electric vehicle 30 (S904). Additionally, it is possible to check whether the status of the checked battery satisfies the charging mode conversion conditions according to the current charging protocol (S906).

For example, the charging mode conversion condition may be a condition for conversion to CV (Constant Voltage) mode. In this case, the CC-CV charging protocol, the SOC-based MSCC method's degradation delay charging protocol, and the CCCF-PC method, CCVF-PC method, and VCCF-PC method's degradation delay charging protocol, the battery voltage is set to a preset voltage. Whether or not is reached may be the charging mode conversion condition.

On the other hand, in the case of battery voltage-based MSCC type degradation delay charging protocol, DVV-PC degradation delay charging protocol that modulates voltage in pulse form instead of current, or VFV-PC degradation delay charging protocol, charging according to charging time or state of charge (SOC), etc. There may be a mode switching condition.

If the charging mode switching condition is met as a result of the check in step S906, the charging station 20 can switch to the CV mode and gradually reduce the amount of charging current (908). And it can be determined whether the battery charging termination conditions are met (S910). Here, the battery charging termination condition can be set in various ways, such as battery state of charge (SOC) or charging time. And, if the battery charging termination condition is met as a result of the determination in step S910, the charging station 20 may terminate the charging of the battery. Then, the supply of battery charging current may be terminated (S912).

FIG. 10 is a flowchart illustrating in more detail the operation process of the electric vehicle 30 that transmits battery state information according to the charging state of the battery to the charging control server 10 during the operation process of FIG. 7.

Referring to FIG. 10, when charging current for charging the battery is supplied from the charging station 20, the electric vehicle 30 detects the time for which the charging current is supplied, and the current value and voltage value of the supplied charging current. You can do it (S1000). In addition, various state changes of the battery according to the supply of the charging current can be detected and stored (S1002).

For example, the change in the state of the battery detected in step S1002 may be a change in the temperature of the battery or a change in the state of charge of the battery (increase in charge or voltage) depending on the time when charging current is supplied. Alternatively, it may be a change in the temperature of the battery or a change in the charging state of the battery (increase in charge or voltage) depending on the current value or voltage value of the charging current of the battery. Alternatively, it may be the time it takes to reach the target voltage or target state of charge (SOC) with respect to the current value or voltage value of the charging current.

And the electric vehicle 30 can check whether the preset battery charging termination condition has been met (S1004). And if the battery charging termination condition is not met, the process from step S1000 to step S1002 may be repeated. That is, while battery charging is performed, the electric vehicle 30 can continuously detect changes in the state of the battery and store the detected state changes.

Meanwhile, if the battery charging end condition is met as a result of the check in step S1004, the electric vehicle 30 can generate battery state information including the detected change in the state of the battery (S1006). And the generated battery status information can be transmitted to the charging control server 10 (S1008).

In this case, the battery status information may be received and managed by the battery management server 110 of the charging control server 10, and the battery management server 110 determines the degree of deterioration of the battery based on the received battery status information. It can be calculated. And based on the degree of deterioration, the value of at least one of the control parameters of the charging protocol provided to the electric vehicle 30 may be updated.

FIG. 11 is a block diagram showing a configuration in which the charging sequence of the charger is controlled according to firmware provided by the charging station management server 120. And FIG. 12 is a flowchart showing the operation process of the charging station 20 in which the firmware of the charging station 20 is updated by the charging station management server 120.

Referring to FIG. 11 , the charging station 20 may be provided with a user interface (I/F) 260. And the charging station control unit 200 can be controlled according to user information input through the user interface 260. Additionally, the charging station 20 can control the charging sequence of the electric vehicle 30 through firmware 250 connected to the battery management system (BMS) 310 of the electric vehicle 30. As an example, the charging sequence may be a charging sequence according to ISO15118, and in the case of fast charging, it may be a charging sequence according to IEC61851. In this case, the firmware 250 may be used to control at least one charging module 220.

Meanwhile, the battery management system (BMS) 310 of the electric vehicle 30 is a BMS for controlling the OBD (On Board Device) 350 of the battery according to the charging sequence controlled by the firmware 250 of the charging station 20. Data and EV data can be provided to the OBD (350).

Meanwhile, the battery management system 310 may include an expansion module 311 in which a deterioration prevention charging profile is stored. In addition, the expansion module 311 can store information about the degradation delay charging protocol provided by the charging station 20, and can store the information about the degradation delay charging protocol provided by the charging station 20 as a degradation delay charging profile. there is. And, upon request from the charging station 20, information on the deterioration delay charging profile may be provided to the charging station 20.

Meanwhile, the charging station control unit 200 of the charging station 20 may receive information about the deterioration delay charging profile from the expansion module 311 of the electric vehicle 30. In addition, the firmware 250 can be controlled so that degradation delay charging is performed according to a specific degradation delay charging protocol according to the received degradation delay charging profile. Then, the firmware 250 can control the charging sequence according to the deterioration delay charging control of the charging station control unit 200 so that the battery of the electric vehicle 30 is charged.

Here, the firmware 250 may be provided by the charging station management server 120. Additionally, it may be updated by the charging station management server 120 using a method such as OTA (Over The Air).

FIG. 12 shows a configuration in which the firmware 250 of the charging station 20 is updated by the charging station management server 120.

Referring to FIG. 12 , the charging station 20 may first check the version of the currently installed firmware 250 according to a request from the charging station management server 120. And the version information of the checked firmware can be transmitted to the charging station management server 120 (S1200).

Then, the charging station management server 120 may transmit updated version firmware data to the charging station 20 in response to the received version information of the firmware 250. Then, the charging station 20 can receive the transmitted updated version of firmware data (S1202). And when firmware data of the updated version is received, the charging station 20 may stop the operation of the charging module 220 (S1204). And while the operation of the charging module is stopped, the firmware 250 can be updated based on the firmware data of the updated version (S1206).

And when the firmware update is completed, the charging module 220 can be reset and the updated firmware version can be checked (S1208). In this case, the charging station control unit 200 may transmit the confirmed firmware version to the charging station management server 120. Accordingly, the charging station management server 120 can check the update status of the firmware 250 of the charging station 20 by checking the version of the received firmware.

Meanwhile, in the above description, a configuration for determining the deterioration state of the battery using battery state information collected during battery charging was explained. However, of course, the deterioration state of the battery can be determined based on not only the state of charge of the battery but also the state of discharge of the battery. In this case, the battery state information collection unit 330 of the electric vehicle 30 may further collect the state information of the discharged battery when the battery is discharged, such as while driving the electric vehicle 30, and transmit it to the charging control server 10. Then, the charging control server 10 updates the deterioration state of the battery based on the received battery state information (battery discharge state information), and stores the battery information stored in association with the vehicle identification information of the electric vehicle 30 according to the updated battery deterioration state. The control parameters of the degradation delay charging protocol can be updated. And the updated control parameters can be applied to the degradation delay charging protocol used when charging the battery of the electric vehicle 30 in the future.

The present invention described above can be implemented as computer-readable code on a program-recorded medium. Computer-readable media includes all types of recording devices that store data that can be read by a computer system. Examples of computer-readable media include HDD (Hard Disk Drive), SSD (Solid State Disk), SDD (Silicon Disk Drive), ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, etc. This also includes those implemented in the form of carrier waves (e.g., transmission via the Internet). Accordingly, the above detailed description should not be construed as restrictive in all respects and should be considered illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

Claims

Manage and control at least one charging station, receive vehicle identification information from at least one of the electric vehicle or the charging station, identify a battery model corresponding to the received vehicle identification information, and determine a plurality of degradation delays according to the identified battery model. When one of the charging protocols is determined, a charging station management server that controls the charging station to charge the battery in a manner according to the determined degradation delay charging protocol; and

Contains information related to a plurality of degradation delay charging protocols corresponding to each different battery model, determining one of the plurality of degradation delay charging protocols according to the identified battery model, and information related to the determined degradation delay protocol. A charging control server comprising a battery management server that transmits to the charging station management server.
The method of claim 1, wherein the charging station management server,

Store and manage any one of the degradation delay charging protocols provided to the charging station for charging the battery, and store and manage at least one of vehicle identification information of the electric vehicle, battery identification information of the battery, user information of the electric vehicle, and payment method information. Manages information containing one,

The battery management server,

Collect state information of the battery to determine the degree of degradation of the battery, update control parameters related to one of the degradation delay charging protocols according to the determined degree of degradation, and set the updated control parameters to the determined degradation delay charging protocol. A charging control server that transmits information related to the charging station to the charging station management server.
The method of claim 2, wherein the battery status information is:

At least one of the charging time required to charge to a preset target voltage, the battery charging state according to the size of the charging current, the amount of battery voltage increase according to the charging time or charging current, and the battery temperature change according to the charging time or charging current. A charging control server comprising:
The method of claim 2, wherein the plurality of degradation delay charging protocols are:

MSCC-CV (Multi-stage Constant Current - Constant Voltage) charging protocol that controls the charging sequence so that the current value is gradually reduced, or charge duty and rest duty according to the duty cycle. A charging control server characterized in that it is a PC (Pulse Charging) type charging protocol that modulates charging current or charging voltage in the form of a pulse and supplies it to the battery.
According to paragraph 4,

The control parameters are,

Depends on the type of degradation delay charging protocol,

The battery management server,

When the degradation delay charging protocol is the MSCC-CV charging protocol, at least one of the number of stages in which the magnitude of the charging current is reduced, the transition conditions of the stages, and the maximum current value for each stage is controlled. Sent to the charging station management server as a parameter,

When the degradation delay charging protocol is the PC-type charging protocol, the frequency of the charging current or charging voltage supplied in pulse form, the duty cycle of the charging current or charging voltage supplied in pulse form, and the supply and rest periods. A charging control server, characterized in that transmitting at least one of the time values corresponding to and the magnitude of the charging current or charging voltage supplied to the supply and the idle period as the control parameter to the charging station management server.
The method of claim 2, wherein the charging station management server,

Charging, characterized in that receiving updated control parameters from the battery management server and storing the received control parameters and information about one of the degradation delay charging protocols in association with the vehicle identification information. Control server.
According to clause 6,

The charging station management server,

When the electric vehicle and the charging station satisfy preset conditions, transmitting information on one of the degradation delay charging protocols and the control parameters stored in association with the vehicle identification information to the charging station,

The preset conditions are:

As a condition related to starting charging of the battery, whether or not it is met is determined depending on whether the charging terminal of the electric vehicle and the supply terminal of the charging station are coupled or whether the electric vehicle enters an area corresponding to the charging station. Charging control server.
According to paragraph 2,

The charging station management server,

Whether there is a degradation delay charging protocol applicable to the battery, depending on whether a communication connection is possible with an expansion module of the electric vehicle installed for charging the battery according to the degradation delay charging protocol, via the charging station or directly from the electric vehicle. An electric vehicle charging control system characterized by determining.
The method of claim 1, wherein the vehicle identification information is:

A charging control server, characterized in that it is any one of communication unit identification information (EVCC ID (Electric Vehicle Communication Controller) ID) of the electric vehicle, vehicle number of the electric vehicle, owner information of the electric vehicle, and information of a specific payment method.
The method of claim 1, wherein the charging station management server,

If there is no protocol applicable to the identified battery model among the plurality of degradation delay charging protocols, the information of the CC-CV protocol is used to enable the charging station to charge the battery according to the CC-CV (Constant Current - Constant Voltage) charging protocol. A charging control server, characterized in that it transmits to the charging station.
The method of claim 2, wherein the battery management server,

Charging characterized by further collecting battery status information when the battery is discharged, determining the degree of deterioration of the battery based on the collected battery discharge state information, and updating the control parameters according to the determined degree of deterioration. Control server.
The method of claim 1, wherein the charging station management server,

If the battery of the electric vehicle corresponding to the vehicle identification information has a history of being charged according to a specific degradation delay charging protocol among the plurality of degradation delay charging protocols, the information of the specific degradation delay charging protocol and the information of the specific degradation delay charging protocol A charging control server that transmits control parameters to the charging station.
The method of claim 1, wherein the charging station management server,

Determine at least one degradation delay charging protocol that the charging station can support,

One degradation delay charging protocol based on the result of comparing at least one degradation delay charging protocol applicable to the battery model of the electric vehicle corresponding to the vehicle identification information and at least one degradation delay charging protocol supportable by the charging station. A charging control server that transmits information of or CC-CV charging protocol information to the charging station.