KR20230024559A - Charging station control server and method for estimating state of health of the battery of electric vehicle - Google Patents

Abstract

A charging station control server and a method for estimating the age of a battery of an electric vehicle are disclosed. The purpose of the present invention is to provide a method for estimating the age of a battery of an electric vehicle to be charged, from an electric vehicle charger side. The use of the present invention has an effect of estimating the age of a battery of an electric vehicle to be charged, from an electric vehicle charger side even when battery age information is not provided from the electric vehicle. The charging station control server according to the present invention comprises a battery rated capacity acquisition unit, a charging voltage control unit, a power consumption measurement unit, a current consumption calculation unit, a current consumption storage unit, a battery age storage unit, a driving record storage unit, a relative power ratio measurement unit, a charging power storage unit, and a communication interface unit.

Description

Charging station control server and method for estimating aging of electric car battery

The present invention relates to a charging station control server and a method for estimating the age of an electric vehicle battery.

In the case of an electric vehicle, especially an electric bus that is generally charged only in a garage, sufficient remaining battery capacity (SOC: State of Charge) must be secured before operation. In particular, since the operating schedule for the electric route bus is set, sufficient remaining capacity is secured within the limited idle time only when the length of idle time in the garage after operation and the amount of charging power per unit time that can be charged in the charger are well understood. You can charge as much as possible.

To this end, the concept of state of health (SOH) of the battery is used together when charging the battery of the electric vehicle. That is, since the battery used in an electric vehicle deteriorates with repeated use, in the case of an electric vehicle that has been operated for more than a certain time (or mileage), the battery is considered to have reached the end of its life due to aging and the battery is replaced.

Meanwhile, throughout the specification, the battery age of a new battery is defined as 100%, and as the battery is used, the battery age is considered to gradually decrease to a value less than 100%.

The age of the battery is determined for each vehicle in a battery management system (BMS) installed in the electric vehicle. In an electric vehicle, information about the age (SOH) of the installed battery is stored. Chargers at charging stations sometimes require battery aging information, but at present, electric vehicle manufacturers do not provide battery aging information from electric vehicles to chargers. Therefore, the electric vehicle charger is in a situation where it is impossible to know even if it wants to know the age of the battery of the electric vehicle that requires charging.

The age of the battery affects the amount of power to be charged to the vehicle. That is, as the battery ages, the electric vehicle must charge more power to travel the same mileage.

In order to solve the problem that the electric vehicle charging station does not receive information on the age of the battery from the electric vehicle that requires charging, a request for a method of estimating the age of the battery of the electric vehicle to be charged has been raised by the electric vehicle charger side.

KR 10-1839141 B

The present invention has been conceived in response to the above requests, and an object of the present invention is to provide a method for estimating the age of a battery of an electric vehicle to be charged in an electric vehicle charger.

In order to achieve the above object, the charging control server according to one aspect includes a battery rated capacity acquisition unit, a charging voltage control unit, a power consumption measurement unit, a current consumption calculation unit, a current consumption storage unit, a battery aging storage unit, and a driving a battery rated capacity acquisition unit including a recording storage unit, a relative power ratio measuring unit, a charging wattage storage unit, and a communication interface unit, and acquiring rated wattage information of a battery to be charged installed in an electric vehicle to be charged; a charging voltage controller for controlling the magnitude of the charging voltage applied to the electric vehicle connected to the charger and obtaining an average of the applied charging voltage; a power consumption measurement unit measuring the amount of charging power supplied to the electric vehicle; a current consumption calculation unit that calculates an amount of current used while charging the electric vehicle using the average voltage and the amount of charging power; a current consumption storage unit for storing the current consumption calculated by the current consumption calculation unit during charging; a battery age storage unit for storing an estimated age of the battery of the electric vehicle; a driving record storage unit that stores information about driving of the electric vehicle; a relative fuel consumption ratio measurement unit measuring a relative fuel consumption ratio of the electric vehicle; a charging power storage unit that stores power consumption information when the electric vehicle is charged; and a communication interface unit that is connected to at least one charger and performs data communication. includes

In this case, the current consumption calculator may calculate the current consumption during charging by dividing the power consumption during charging by the average voltage applied during charging.

In addition, the current consumption calculation unit may further calculate the current consumption per unit remaining capacity by dividing the current consumption during charging by the remaining capacity increased through charging.

In addition, the battery age storage unit may calculate and store the current estimated age as a percentage value obtained by dividing current consumption per unit residual capacity during current charging by current consumption per unit residual capacity during initial charging.

Also, the relative power ratio measurement unit may measure the relative power ratio by dividing the mileage after the previous charge stored in the driving record storage unit by the amount of change in remaining capacity after the previous charge.

A method for estimating battery age according to another aspect of the present invention includes the step of checking the current consumption per unit capacity of a battery to be charged during initial charging (S10), and the step of checking the current consumption per unit capacity of the battery to be charged (S20). ); and calculating the current estimated deterioration (S30).

At this time, the step (S10) may include obtaining battery rated capacity information (S110); Performing an initial battery charge (S120); Measuring an average voltage during initial charging (S130); Measuring the amount of power consumed during initial charging (S140); and calculating an amount of current consumed during initial charging (S150).

In addition, in the step S150, the amount of current consumption during charging can be obtained by dividing the amount of power consumption during charging by the average voltage applied during charging.

In addition, in the step S150, the current consumption per unit remaining capacity may be further obtained by dividing the current consumption during charging by the remaining capacity increased through charging.

In addition, the step (S20), performing a battery charging step (S220); Measuring an average voltage during current charging (S230); Measuring the amount of power consumed during current charging (S240); and calculating an amount of current consumption during current charging (S250).

In addition, in the step S250, the amount of current consumption during charging can be obtained by dividing the amount of power consumption during charging by the average voltage applied during charging.

In addition, in the step S250, the current consumption per unit remaining capacity may be further obtained by dividing the current consumption during charging by the remaining capacity increased through charging.

If the present invention is used, there is an effect of estimating the age of the battery of the electric vehicle to be charged at the electric vehicle charger side even if the battery age information is not provided from the electric vehicle.

1 is a diagram illustrating a state in which an electric vehicle charging station, an electric vehicle being charged, and a related external server are connected;
2 is a block diagram showing an example of a charging station control server in which a method for estimating the age of a battery of an electric vehicle and a method for calculating an optimal charging power amount according to the present invention are implemented;
3 is a flowchart showing an example of a method for estimating battery aging of an electric vehicle;
4 is a flowchart showing step S10 of FIG. 3 in more detail;
5 is a flowchart illustrating step S20 of FIG. 3 in more detail.

Hereinafter, a method for estimating battery age of an electric vehicle according to the present invention will be described in detail with reference to the drawings.

1 is a diagram illustrating a state in which an electric vehicle charging station, an electric vehicle being charged, and a related external server are connected.

As shown in FIG. 1, the electric vehicle charging station 1 communicates with the charging station control server 10, at least one charger 11, and communication data exchanged between the charging station control server 10 and at least one charger 11. It consists of a network (12).

One charger 11 performs battery charging for one electric vehicle 2 . At this time, a communication line is connected between the charger 11 and the electric vehicle 2 in order to receive necessary data from the vehicle or transmit necessary data to the vehicle for charging the battery. As the communication line, for example, wired communication according to the CAN protocol and/or wireless communication according to the RFID protocol may be used. In addition, the charger 11 supplies charging power to the electric vehicle 2 based on the charging schedule controlled by the charging station control server 10.

On the other hand, the charging station control server 10 is further connected to the transportation company manager server 3 or the service-related government office server 4 through another communication network. The most important thing in the electric vehicle charging station 1 is information on costs and sales, such as electric charge information according to charging power usage and charging information on charging charges according to charging of the electric vehicle.

For example, information exchanged with the transport company manager server 3 may include data fields as shown in the table below.

data field name Description of data fields CHARGER_ID Charger ID OUTLET_ID Charge gun ID CARD_NUM Membership card number DB_ID DB ID MODE charger operation mode STATUS charger status STATUS_CODE charger status code batteryStatus battery status startSoc start SOC socRate Shutdown SOC batteryCapacity battery capacitor batteryQnty battery power consumption batteryVoltage battery power chargingQnty power consumption chargingPrice charge amount batteryTemper battery temperature BMS_VERSION BMS version estimateEnd Estimated date and time of charging end Remaining time
(h h mm) chargingTime Power supply period (hh mm ss) chargerCompleteStatus full charge status starttime charging start time Endtime charge end time Rotate monitoring batch rotation value Posx monitoring coordinate X Posy Monitoring coordinate Y Color monitoring status color queue_num waiting list chargerVoltage charger voltage chargerAmpere charger current

2 is a block diagram showing an example of a charging station control server in which a method for estimating the age of a battery of an electric vehicle and a method for calculating an optimal charging power amount according to the present invention are implemented.

As shown in FIG. 2, the charging station control server 10 according to an example includes a battery rated capacity acquisition unit 100, a charging voltage control unit 110, a power consumption measurement unit 120, a current consumption calculation unit 130, Including current consumption storage unit 140, battery age storage unit 150, driving record storage unit 160, relative power ratio measurement unit 170, charging power storage unit 180 and communication interface unit 190 It is done.

The battery rated capacity acquisition unit 100 acquires information on the rated power of a battery to be charged installed in the electric vehicle to be charged.

Information on the rated power amount of the battery may be directly obtained from the electric vehicle 2 connected to the charger 11 for charging. Alternatively, vehicle type information of the corresponding electric vehicle 2 is obtained from the electric vehicle 2, and battery information for each vehicle type stored in the driving record storage unit 160 in the charging station control server 10 (including the rated power consumption information of the battery) is stored. Information on the rated power amount of the battery may be obtained by referring to the reference.

The charging voltage control unit 110 controls the magnitude of the charging voltage applied to the electric vehicle 2 connected to the charger 11. In addition, the charging voltage control unit 110 may obtain an average voltage of the charging voltage applied to the electric vehicle 2 for a certain period of time.

The power consumption measuring unit 120 measures the amount of charging power supplied to the electric vehicle 2 . To this end, information on the charging start time, charging end time, and required charging time is used, and information about the measured amount of charging power is recorded in the charging power storage unit 180.

The current consumption calculation unit 130 uses the voltage value measured by the charging voltage control unit 110 and the amount of charging power measured by the power consumption measurement unit 120 while charging the electric vehicle 2. Calculate the amount of current

The average of the charging voltages from the time (t ₁ ) to the time (t ₂ ) applied to the electric vehicle 2 by the charging voltage controller 110 is V _avg (t ₁ , t ₂ ) (unit is V (Volt)). And, if the size of the amount of charging power from the time (t ₁ ) to the time (t ₂ ) measured by the power consumption measuring unit 120 is P(t ₁ , t ₂ ) (unit: Wh (Watt-hour)) , Current consumption I (t ₁ , t ₂ ) (unit: Ah (Ampere-hour)) calculated by the current consumption calculation unit 130 can be expressed as in Equation 1.

[Equation 1]

I(t ₁ ,t ₂ ) = P(t ₁ ,t ₂ ) / V _avg (t ₁ ,t ₂ ).

The current consumption storage unit 140 stores the current consumption calculated by the current consumption calculation unit 130 during charging.

The battery age storage unit 150 stores the estimated SOH of the battery of each electric vehicle 2 calculated by the charging station control server 10 according to an example of the present invention. In the present invention, the aging degree (SOH) information from each electric vehicle 2 is not received and used. Therefore, unless otherwise stated, the estimated age (Estimated SOH) or age (SOH) mentioned in this specification are all estimated age of the battery of each electric vehicle 2 calculated by the charging station control server 10. You have to understand.

The driving record storage unit 160 stores records related to driving of the electric vehicle 2 .

If the electric vehicle (2) is a route bus, the driving record stored in the driving record storage unit 160 is the vehicle number, route number (route name), operation start time after charging, operation end time, required operation time, travel distance, operation Remaining capacity (SOC) at the start and remaining capacity (SOC) at the end of operation may be included.

The relative power ratio measuring unit 170 measures the relative power ratio of the electric vehicle 2 . Fuel economy is a concept corresponding to 'fuel efficiency', which means the fuel efficiency of an internal combustion engine vehicle, and refers to the power efficiency of an electric vehicle, and is generally expressed as a driving distance per unit power (km/kWh). However, in the present invention, in order to more clearly reveal the characteristics of the invention, the concept of “relative contrast ratio” is defined as a driving distance per unit remaining capacity (km/SOC%).

Therefore, it should be understood that the relative fuel ratio mentioned in this specification is the driving distance per unit residual capacity (km/SOC%) unless otherwise stated.

The relative fuel ratio is used for the purpose of calculating the effective amount of power required for charging a single vehicle regardless of other vehicles.

When the amount of power consumed in the process of charging the electric vehicle 2 is measured by the power consumption measuring unit 120, the charging power amount storage unit 180 stores the power consumption information.

The communication interface unit 190 performs data communication with at least one charger 11 connected to the charging station management server 10 . In addition, data communication may be performed by being further connected to an external transportation company manager server 3 or a service-related government office server 4 .

3 is a flowchart illustrating an example of a method for estimating the age of a battery of an electric vehicle.

As shown in FIG. 3, the method for estimating battery age of an electric vehicle includes a step of checking the current consumption per unit capacity of a battery to be charged during initial charging (S10), and a step of checking the current consumption per unit capacity of the battery to be charged. (S20) and calculating the current estimated old age (S30).

In step S10, the amount of current consumed per unit capacity (Ah/SOC%) at the time of initial charging of the battery installed in the electric vehicle to be charged is confirmed.

For example, when an electric vehicle is a commercial route bus, charging is performed at a garage charging station. When a new electric route bus is introduced, the new electric route bus can be regarded as having a battery age of 100%.

Therefore, when a new electric route bus is initially charged, it can be seen that charging-related data can be obtained in a state where the battery deterioration is 100%.

For example, the average of the charging voltages from the time (t ₁ ) to the time (t ₂ ) applied to the electric vehicle 2 by the charging voltage control unit 110 during initial charging is V _0,avg (t ₁ , t ₂ ) , If the size of the amount of charging power from the time (t ₁ ) to the time (t ₂ ) measured by the power consumption measurement unit 120 is P ₀ (t ₁ , t ₂ ), the current consumption calculation unit 130 calculates The current consumption I ₀ (t ₁ , t ₂ ) can be expressed as in Equation 2.

[Equation 2]

I ₀ (t ₁ ,t ₂ ) = P ₀ (t ₁ ,t ₂ ) / V _0,avg (t ₁ ,t ₂ ).

The current consumption storage unit 140 stores the current consumption calculated by the current consumption calculation unit 130 during charging.

At this time, if the remaining capacity increased through charging is C ₀ (t ₁ , t ₂ ) (SOC%), the current consumption per unit capacity I _0,uint (t ₁ , t ₂ ) can be expressed as in Equation 3 there is.

[Equation 3]

I _0,unit (t ₁ ,t ₂ ) = I ₀ (t ₁ ,t ₂ ) / C ₀ (t ₁ ,t ₂ )

= { P ₀ (t ₁ ,t ₂ ) / V _0,avg (t ₁ ,t ₂ ) } / C ₀ (t ₁ ,t ₂ ).

The unit becomes (Ah/SOC%).

The amount of current consumed per unit capacity at the time of initial charging may be stored in the current consumption storage unit 140 of the charging station control server 10 . Once stored, the amount of current consumed per unit capacity at the time of initial charging is used as a criterion for determining the degree of aging of the battery when the aging of the battery progresses as the same electric vehicle is operated repeatedly.

In step S20, current consumption per unit capacity of the battery to be charged is checked.

Step S20 is a step of measuring the amount of current consumed per unit capacity at a point in time (current point) when the aging of the battery has progressed as the electric vehicle operates.

The average of the charging voltages from the time (t ₃ ) to the time (t ₄ ) applied to the electric vehicle 2 by the charging voltage control unit 110 during charging at the current point in time is V _avg (t ₃ , t ₄ ), and consumption If the size of the charging power from the time (t ₃ ) to the time (t ₄ ) measured by the power measurement unit 120 is P(t ₃ , t ₄ ), the current consumption calculated by the current consumption calculation unit 130 I(t ₃ , t ₄ ) can be expressed as in Equation 4.

[Equation 4]

I(t ₃ ,t ₄ ) = P(t ₃ ,t ₄ ) / V _avg (t ₃ ,t ₄ ).

Similarly, if the remaining capacity increased through charging is C(t ₃ , t ₃ ) (SOC%), the current consumption per unit capacity I _unit (t ₃ , t ₄ ) can be expressed as in Equation 5.

[Equation 5]

I _unit (t ₁ ,t ₂ ) = I(t ₁ ,t ₂ ) / C(t ₁ ,t ₂ )

= { P(t ₁ ,t ₂ ) / V _avg (t ₁ ,t ₂ ) } / C(t ₁ ,t ₂ ).

The unit becomes (Ah/SOC%).

In step S30, a current estimated old age calculation is performed.

Since the current consumption per unit capacity is stored in the current consumption storage unit 140, the ratio of the current consumption per unit capacity during the current charging to the current consumption per unit capacity during the initial charging, when the battery is not aged at all, is stored in the current consumption storage unit 140. Expressed as a percentage to define the current estimated deterioration, and expressed as SOH (t ₁ , t ₂ , t ₃ , t ₄ ), it can be expressed as in Equation 6 below.

[Equation 6]

SOH(t ₁ ,t ₂ ,t ₃ ,t ₄ ) = { I _unit (t ₃ ,t ₄ ) / I _0,unit (t ₁ ,t ₂ )} × 100

= [{P(t ₃ ,t ₄ ) / V _avg (t ₃ ,t ₄ )} / {P ₀ (t ₁ ,t ₂ ) / V _0,avg (t ₁ ,t ₂ )}] × 100 ( %).

In addition, when the values of the current estimated aging SOH (t ₁ , t ₂ , t ₃ , _{t 4} ) are determined by Equation 6, the interval (t _x to t _y ), the magnitude of the amount of power to be charged P(t _x ,t _y ) can be obtained using Equation 7 below.

[Equation 7]

P(t _x ,t _y ) = {SOH(t ₁ ,t ₂ ,t ₃ ,t ₄ ) / 100} × P ₀ (t ₁ ,t ₂ ) (kWh).

In other words, Equation 7 means that when the estimated aging value decreases as the electric vehicle is operated, the amount of power to be charged now should be higher than the amount of power charged at the initial time when the efficiency of the battery was the highest in consideration of the decrease in efficiency of the battery. will be.

In the past, charging was performed depending only on the battery aging value provided unilaterally from an electric vehicle requiring battery charging to a charging station. Therefore, even if the battery aging value provided by the electric vehicle is different from the actual value, there is no way to verify it at the charging station, so it is exposed to the risk of explosion or battery durability due to overcharging, or conversely, the battery capacity is reduced due to undercharging. was exposed to the problem of not sufficiently increasing the mileage due to insufficient utilization of

In the present invention, the current battery age can be directly estimated from the electric vehicle charging station control server 10 through such a process, and thus the efficiency and reliability of battery charging can be improved.

FIG. 4 is a flowchart illustrating step S10 of FIG. 3 in more detail.

As shown in FIG. 4, the steps (S10) include obtaining battery rated capacity information (S110), performing initial charging of the battery (S120), measuring an average voltage during initial charging (S130), and initial charging. It includes measuring the amount of power consumed during charging (S140) and calculating the amount of current consumed during initial charging (S150).

In order to express the embodiment shown in FIG. 4 in detail, let's assume that the charging-related data when the newly introduced electric route bus is initially charged at the charging station is identified in the charging station control server 10 as shown in Table 2.

charging station vehicle
number route name charger
ID Outlet
ID charging start time Charging end time charging time charging power
(kWh) start charging
SOC End of charge
SOC Suwon passenger Gyeonggi 70 bar 1663 13 32 B 2021-02-26
23:41:29 2021-02-27
01:39:45 01:58:15 177.28
23 92

What Table 1 means is that an electric vehicle (route number 13 electric route bus) called Gyeonggi 70 bar 1663 at the Suwon passenger charging station performed battery charging through the B outlet of the charger (charger ID number 32) in the charging station. In addition, charging started at 2021-02-26 23:41:29 and ended at 01:39:45 after 1 hour 58 minutes and 15 seconds, at which time the charging power amount was 177.28 (kWh), and such charging Through this, it can be seen that the remaining capacity (SOC) of the battery has increased from 23% to 92%.

In step S110, information on the rated capacity of the battery of the electric vehicle is acquired in order to perform the initial charging of the electric vehicle. The battery rating capacity information of the electric vehicle is directly transmitted from the electric vehicle through RFID, or after receiving the vehicle type information of the electric vehicle from the electric vehicle through RFID, stored in the driving record storage unit 160 in the charging station control server 10 It can be obtained by comparing with the rated capacity information of each vehicle type.

In step S120, the battery is initially charged by supplying power from the charger to the electric vehicle side. When charging a battery, it is common that the applied voltage and current amount vary in order to secure power efficiency and safety.

Therefore, in step S130, the average voltage applied to the electric vehicle during initial charging is measured. In order to measure the average voltage, the average voltage applied during the entire charging time is obtained by dividing the charging start time and the charging end time by a certain time interval (e.g., 1 second) and recording the voltage at the corresponding time every 1 second elapses. can In this embodiment, it is assumed that the average voltage is 644.18 (V).

In step S140, the amount of power consumption supplied to the electric vehicle during initial charging is measured. The amount of power consumption may be measured by the power consumption measurer 120 .

In step S150, current consumption calculation is performed at the time of initial charging.

As described above in FIG. 3 , if the average voltage applied at the time of initial charging and the amount of power consumption at that time are known, the amount of current consumption can be obtained through Equation 1.

The amount of current consumed during initial charging is 177.28 (kWh) * 1000 / 644.18 (V) = 275.20 (Ah).

In step S160, current consumption per unit capacity is calculated during initial charging.

Referring to Table 1, under the assumption that the average voltage applied during charging is 664.18 (V), it can be seen that 266.91 (Ah) of current consumption was required to increase the remaining capacity by 69%P from 23% to 92%. there is. That is, the current consumption per unit capacity at the time of initial charging I _0,unit is,

I _0,unit = 275.20 (Ah) / (92 - 23)(SOC%) = 3.99 (Ah/SOC%)

is obtained with

5 is a flowchart illustrating step S20 of FIG. 3 in more detail.

As a result of charging at some point after the electric vehicle shown in FIG. 4 continued to operate, the electric power amount of 221.08 (kWh) was charged to the electric vehicle at an average voltage of 665.43 (V), and as a result, the remaining capacity was reduced from 7 (SOC%) to 7 (SOC%). Consider the case of an increase to 95 (SOC%).

The current consumption I at this time is

I = 221.08 (kWh) * 1000 / 665.43 (V) = 332.24 (Ah)

becomes

In addition, the current consumption I _unit per unit capacity is,

I _unit = 332.24 / (95-7) = 3.78(Ah/SOC%)

becomes

Therefore, if the estimated battery age (SOH) of this electric vehicle is obtained by Equation 6,

SOH = (I _unit / I _0,unit ) × 100 = 3.78/3.99 × 100 = 88(%).

That is, it can be seen that the performance of the battery is lowered to 88% compared to the initial state of 100%.

Therefore, according to Equation 7, the battery to be charged at this time must be charged with 100/88 = 1.14 times the amount of power compared to the initial charge.

In addition, this can be used for calculating the relative power ratio.

If the driving distance of this electric vehicle stored in the driving record storage unit 160 is 180.5 (km), the remaining capacity of this electric vehicle decreased from 95 (SOC%) to 7 (SOC%) while driving the distance means

As described above, in this specification, since the relative fuel efficiency is defined as the driving distance (km/SOC%) that can be driven per unit residual capacity, the relative fuel efficiency is calculated as shown in Equation 8.

[Equation 8]

(relative ratio) = 180.5 / (95-7) = 2.05 (km/SOC%).

Therefore, when referring to the route information (route travel distance and the number of times that the electric vehicle must run during one charge) in the driving record storage unit 160 after charging, higher accuracy is obtained through Equations 6 and 7. The amount of charging power can be calculated.

Claims (12)

Includes battery rated capacity acquisition unit, charging voltage control unit, power consumption measurement unit, current consumption calculation unit, current consumption storage unit, battery age storage unit, operation record storage unit, relative power ratio measurement unit, charging power storage unit and communication interface unit and
a battery rated capacity obtaining unit that obtains information on the rated power of a battery to be charged installed in the electric vehicle to be charged;
a charging voltage controller for controlling the magnitude of the charging voltage applied to the electric vehicle connected to the charger and obtaining an average of the applied charging voltage;
a power consumption measurement unit measuring the amount of charging power supplied to the electric vehicle;
a current consumption calculation unit that calculates an amount of current used while charging the electric vehicle using the average voltage and the amount of charging power;
a current consumption storage unit for storing the current consumption calculated by the current consumption calculation unit during charging;
a battery age storage unit for storing an estimated age of the battery of the electric vehicle;
a driving record storage unit that stores information about driving of the electric vehicle;
a relative fuel consumption ratio measurement unit measuring a relative fuel consumption ratio of the electric vehicle;
a charging power storage unit that stores power consumption information when the electric vehicle is charged; and
a communication interface unit that is connected to at least one charger and performs data communication;
Including, charging control server.
According to claim 1,
Wherein the current consumption calculation unit calculates the current consumption during charging by dividing the amount of power consumed during charging by the average voltage applied during charging, the charging station control server.
According to claim 2,
The charging station control server, wherein the current consumption calculation unit divides the current consumption during charging by the remaining capacity increased through charging to further obtain the current consumption per unit remaining capacity.
According to claim 3,
The battery aging storage unit calculates and stores the current estimated aging as a percentage value obtained by dividing the current consumption per unit remaining capacity during current charging by the current consumption per unit remaining capacity during initial charging. The charging station control server.
According to claim 1,
The charging station control server, wherein the relative power ratio measurement unit measures the relative power ratio by dividing the mileage after the previous charge stored in the driving record storage unit by the amount of change in remaining capacity after the previous charge.
Checking the amount of current consumed per unit capacity at the time of initial charging of the battery to be charged (S10);
Checking current consumption per unit capacity of the battery to be charged (S20);
and calculating a current estimated age (S30). According to claim 6,
In the step (S10),
Obtaining battery rated capacity information (S110);
Performing an initial battery charge (S120);
Measuring an average voltage during initial charging (S130);
Measuring the amount of power consumed during initial charging (S140); and
A method for estimating battery age, further comprising calculating the amount of current consumed during initial charging (S150).
According to claim 7,
In the step (S150), the amount of current consumption during charging is obtained by dividing the amount of power consumed during charging by the average voltage applied during charging.
According to claim 8,
In the step (S150), the amount of current consumed per unit remaining capacity is further obtained by dividing the amount of current consumed during charging by the remaining capacity increased through charging.
According to claim 6,
In the step (S20),
performing battery charging (S220);
Measuring an average voltage during current charging (S230);
Measuring the amount of power consumed during current charging (S240); and
A method for estimating battery age, further comprising calculating an amount of current consumed during current charging (S250).
According to claim 7,
In the step (S250), the amount of power consumption during charging is divided by the average voltage applied during charging to obtain the amount of current consumption during charging.
According to claim 11,
In the step (S250), the amount of current consumed per unit remaining capacity is further obtained by dividing the amount of current consumed during charging by the remaining capacity increased through charging.

Images