KR20230082313A - Battery scheduling method performing scheduling for battery usage of electric vehicla based on energy storage system and apparatus therefor - Google Patents

Abstract

A battery scheduling method and apparatus for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system are disclosed. The battery scheduling method of the present invention includes the steps of collecting first voltage information related to the voltage of a battery and first balancing information related to cell balance while the battery of an electric vehicle is being charged and discharged based on an energy storage system, the first voltage information and performing a first scheduling step for determining a first operation period indicating a period in which charging is required for operation of the battery based on the first balancing information, wherein the battery is operated in the energy storage system based on the first scheduling result Collecting second voltage information related to the voltage of the battery and second balancing information related to the cell balance during the first period in which charging is required for operation of the battery based on the second voltage information and the second balancing information Generating correction information related to the degree of correction required for the operating section, performing second scheduling to determine a second operating section by correcting the first operating section requiring charging for battery operation based on the correction information and controlling the battery of the electric vehicle so that power is provided to the outside through the battery in the energy storage system based on the second scheduling result.

Description

Battery scheduling method and apparatus for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system

The present invention relates to a battery scheduling method and apparatus for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system, and more particularly, voltage information and balancing information for a battery of an electric vehicle through an energy storage system A battery scheduling method and apparatus for determining a charging period required for battery operation by collecting

Recently, as the use of electric vehicles increases, technologies related to electric vehicles are rapidly developing. In particular, various technologies may be applied to the technology of the electric vehicle, but in order to support the use of the electric vehicle, a battery-related technology that supplies power to the electric vehicle is essential and occupies a very important part.

For example, a technology related to a method for minimizing discharge and improving charging efficiency of a battery that supplies power to an electric vehicle, or a technology for improving a charging speed of an electric vehicle battery is being developed. Despite the development and development of such technologies, batteries that supply power to electric vehicles have limitations that cannot be used permanently.

Accordingly, there is a growing need to accurately predict the lifespan of a battery that supplies power to an electric vehicle and appropriately charge the battery in a situation in which charging is required. In this way, in order to accurately predict the lifespan of a battery, it can be predicted through the pattern of charging and discharging of the battery, but it is difficult to accurately predict the lifespan in a situation where the factors affecting the lifespan of a battery are very diverse. there is

On the other hand, in order to operate a battery, such as reusing a battery used in an electric vehicle, it is required as a very important part to perform charging of the battery or properly determine the amount of charge of the battery to be maintained for operation. However, it is somewhat difficult to efficiently determine a charging period related to an amount of charge required for operation of an already used battery in an electric vehicle or the like.

One object of the present invention to solve the above problems is to provide a battery scheduling method for determining a charging period required for battery operation by collecting voltage information and balancing information on a battery of an electric vehicle through an energy storage system. is to do

Another object of the present invention to solve the above problems is to collect voltage information and balancing information about the battery of an electric vehicle through an energy storage system to determine a charging period required for battery operation Provide a battery scheduling device is to do

A battery scheduling method for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system according to an embodiment of the present invention for achieving the above object is an energy storage system (ESS) based on electricity A battery scheduling method performed by a battery scheduling apparatus that performs scheduling for operation of a battery of a vehicle, wherein a first voltage related to a voltage of the battery while the battery of the electric vehicle is being charged and discharged based on the energy storage system ( Collecting voltage information and first balancing information related to cell balance, charging is required for operation of the battery of the electric vehicle based on the collected first voltage information and the collected first balancing information performing a first scheduling for determining a first operating period, which means a period during which the battery operates in the energy storage system based on a result of the first scheduling; second voltage information related to a voltage of the battery while the battery is operated; and Collecting second balancing information related to cell balance, correcting the first operation period, which is a period requiring charging for operation of the battery, based on the collected second voltage information and the second balancing information Generating correction information related to a necessary degree, based on the generated correction information, second scheduling of determining a second operation period by correcting the first operation period in which charging is required to operate the battery of the electric vehicle. and controlling the battery of the electric vehicle so that power is supplied to the outside through the battery of the electric vehicle in the energy storage system based on the second scheduling result.

Here, the first voltage information relates to a voltage state of each cell of a plurality of cells included in the battery of the electric vehicle, which is collected while the battery of the electric vehicle is initially charged and discharged based on the energy storage system. can mean information.

Here, the first balancing information is about the state of charge of each cell of a plurality of cells included in the battery of the electric vehicle, which is collected while the battery of the electric vehicle is initially charged and discharged based on the energy storage system. can mean information.

Here, the step of performing the first scheduling may include calculating a deviation between voltage values for each cell based on the first voltage information and determining a value of the calculated deviation and the first operating period. Comparing voltage reference values with each other, determining a first operating period by checking a period in which the deviation is less than the first voltage reference value in an entire period in which the battery of the electric vehicle can be charged Determining the interval of the candidate, calculating the deviation between the values of the charging amount for each cell based on the first balancing information, and determining the calculated deviation value and the first operating interval. Comparing reference values with each other, identifying a section in which the deviation is less than the first charging reference value in all sections in which the battery of the electric vehicle can be charged, and determining the first operating section of a second candidate for determining the first operation section. The step of determining the interval and the average value between the upper limit value of the interval of the first candidate and the upper limit value of the interval of the second candidate as the upper limit value, and the lower limit value of the interval of the first candidate and the interval of the second candidate It may include determining a section in which the lower limit value is the lower limit value as the first operating section.

Here, the second voltage information is information about the voltage state of each cell of a plurality of cells included in the battery of the electric vehicle, which is collected while the battery is operating in the energy storage system based on the first scheduling result. can mean

Here, the second balancing information is information on the state of charge of each cell of a plurality of cells included in the battery of the electric vehicle collected while the battery is operating in the energy storage system based on the first scheduling result can mean

Here, the generating of the correction information calculates a deviation between voltage values for each cell based on the second voltage information, and determines a value of the calculated deviation and a value requiring correction for the first operating period. Comparing preset second voltage reference values with each other in order to determine a value that requires correction for the first operating interval according to the second voltage information based on the comparison result, and converting the determined value to the first operating interval. Determining as a first correction value for correcting, calculating the deviation between the values of the charging amount for each cell based on the second balancing information, and correcting for the calculated deviation value and the first operating period Comparing preset second charging reference values with each other to determine a required value; determining a value that requires correction for the first operating period according to the second balancing information based on the comparison result; Determining a second correction value for correcting the first operating period and an average value between an upper limit value included in the first correction value and an upper limit value included in the second correction value, and a lower limit included in the first correction value Calculating an average value between a value and a lower limit value included in the second correction value and generating it as the correction information may be included.

Here, the step of performing the second scheduling may include determining an upper limit value and a lower limit value included in the correction information as a second operation period, which means a period in which charging is required for operation of the battery of the electric vehicle. Second scheduling may be performed.

To achieve the above object, a battery scheduling device for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system according to another embodiment of the present invention is based on an energy storage system (ESS). A battery scheduling apparatus that performs scheduling for the operation of a battery of a vehicle, comprising a processor and a memory storing at least one command executed by the processor, wherein the at least one command stores the energy Based on the system, while the battery of the electric vehicle is being charged and discharged, first voltage information related to the voltage of the battery and first balancing information related to cell balance are collected, and the collected first voltage Based on the information and the collected first balancing information, a first scheduling for determining a first operating period, which means a period in which charging is required for operation of the battery of the electric vehicle, is performed, and based on the result of the first scheduling While the battery is operating in the energy storage system, second voltage information related to the voltage of the battery and second balancing information related to cell balance are collected, Based on the collected second voltage information and the second balancing information To generate correction information related to a degree of correction required for the first operation period, which is a period in which charging is required for operation of the battery, and charge for operation of the battery of the electric vehicle based on the generated correction information Second scheduling is performed to determine a second operating period by correcting the required first operating period, and power is supplied from the energy storage system to the outside through the battery of the electric vehicle based on the second scheduling result. and to control the battery of the electric vehicle to be provided.

A battery scheduling method for performing scheduling for the operation of the battery of an electric vehicle based on the energy storage system of the present invention is for the operation of the battery in the process of reusing a battery having a history of use in an electric vehicle or the like. There is an effect of more accurately setting a charging section indicating a charging amount required for charging.

1 is a conceptual diagram illustrating an environment in which a battery scheduling method for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system according to an embodiment of the present invention is performed.
2 is a hardware block diagram of a battery scheduling apparatus performing a battery scheduling method for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system according to an embodiment of the present invention.
3 is a flowchart illustrating a battery scheduling method for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system according to an embodiment of the present invention.
4 is a flowchart illustrating a method of performing first scheduling in a battery scheduling method for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system according to an embodiment of the present invention.
5 is a flowchart illustrating a method of generating correction information in a battery scheduling method for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system according to an embodiment of the present invention.
6 is a conceptual diagram illustrating an operation period determined through a battery scheduling method for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system according to an embodiment of the present invention.

Since the present invention can make various changes and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. Like reference numerals have been used for like elements throughout the description of each figure.

Terms such as first, second, A, and B may be used to describe various components, but the components should not be limited by the terms. These terms are only used for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention. The terms and/or include any combination of a plurality of related recited items or any of a plurality of related recited items.

It is understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle. It should be. On the other hand, when an element is referred to as “directly connected” or “directly connected” to another element, it should be understood that no other element exists in the middle.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

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

1 is a conceptual diagram illustrating an environment in which a battery scheduling method for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system according to an embodiment of the present invention is performed.

Referring to FIG. 1 , a battery scheduling method for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system according to an embodiment of the present invention includes an energy storage system (ESS) 100 and It can be performed through the battery scheduling device 200, and more specifically, it can be performed based on a leading operation by the battery scheduling device 200.

First, the energy storage system 100 may include a plurality of batteries and may refer to a system capable of supplying external power based on the plurality of batteries. In this case, the energy storage system 100 may check states of a plurality of batteries included in the energy storage system 100 .

For example, the energy storage system 100 may check voltage-related information and charge amount-related information for a plurality of batteries included in the energy storage system 100, and transmit the checked information to the energy storage system 100. ) and the connected battery scheduling device 200.

That is, the energy storage system 100 may transmit or receive information required to perform a battery scheduling method for performing scheduling for operation of a battery of an electric vehicle based on the energy storage system according to an embodiment of the present invention. It may be physically connected to the battery scheduling device 200 or connected based on communication.

Meanwhile, the battery scheduling device 200 is configured to operate the plurality of batteries based on voltage-related information and charge amount-related information of the plurality of batteries that can be received or acquired from the energy storage system 100. Scheduling may be performed to determine an operating period in which charging is required.

Here, the information related to the voltage used to perform scheduling for determining the operating period in the battery scheduling apparatus 200 may mean information about the voltage state of a plurality of cells included in the battery, and the voltage state Information on may mean a voltage value.

In addition, the information related to the amount of charge used to perform scheduling for determining the operating period in the battery scheduling apparatus 200 may mean information about the state of charge of a plurality of cells included in the battery, and the state of charge Information on may mean a value of a charging amount.

Through this information, the battery scheduling device 200 can determine the stable level of the voltage state of the battery and the stable level of the balance of the battery, and based on this, determine an operating period in which charging is required to operate the battery. scheduling can be performed. That is, the battery scheduling device may determine a period in which the battery can actually be operated through charging among all the periods in which the battery can be charged for operation of the battery.

Hereinafter, an energy storage system 100 described as performing a battery scheduling method for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system according to an embodiment of the present invention with reference to FIG. 1 , and The hardware structure of the battery scheduling device 200 can be described in detail with reference to FIG. 2 .

2 is a hardware block diagram of a battery scheduling apparatus performing a battery scheduling method for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system according to an embodiment of the present invention.

Referring to FIG. 2, the structure of a battery scheduling device 300 performing a battery scheduling method for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system according to an embodiment of the present invention is shown in FIG. The battery scheduling device 200 described with reference may be described as an example.

Specifically, the battery scheduling apparatus 300 of the present invention includes at least one processor 310 and a memory 320 storing instructions instructing the at least one processor to perform at least one step. ) may be included.

Here, the at least one processor 310 may include a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor in which methods according to embodiments of the present invention are performed. can mean

Each of the memory 320 and the storage device 360 may include at least one of a volatile storage medium and a non-volatile storage medium. For example, the memory 320 may include at least one of a read only memory (ROM) and a random access memory (RAM).

In addition, the battery scheduling device 300 may include a transceiver 330 that performs communication through a wireless network. In addition, the battery life prediction device 300 may further include an input interface device 340 , an output interface device 350 , a storage device 360 , and the like. Each component included in the battery life prediction device 300 may be connected by a bus 370 to communicate with each other.

Here, at least one step may mean a step related to a battery scheduling method for performing scheduling for operation of a battery of an electric vehicle based on the energy storage system according to an embodiment of the present invention, and more specifically, a battery Steps related to the operation method performed by the scheduling device 300 may be included.

Hereinafter, an energy storage system 100 and a battery scheduling device 200 performing a battery scheduling method for performing scheduling for operation of a battery of an electric vehicle based on the energy storage system described with reference to FIG. 1 and FIG. A process of performing a battery scheduling method for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system in the battery scheduling apparatus 300 described with reference to FIGS. 3 to 6 below will be described in more detail. can be explained

3 is a flowchart illustrating a battery scheduling method for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system according to an embodiment of the present invention.

Referring to FIG. 3 , a battery scheduling method for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system according to an embodiment of the present invention includes the energy storage system 100 described with reference to FIG. 1 and This can be performed in the battery scheduling device 200 and the battery scheduling device 300 described with reference to FIG. 2 .

Here, the 'battery of an electric vehicle' or 'battery' described in the present invention may mean a battery that has a history of use in means such as an electric vehicle, in other words, a target for reuse in a state where there is a history of use. It can mean a battery that becomes.

First, the battery scheduling device collects first voltage information related to the voltage of the battery and first balancing information related to cell balance while the battery of the electric vehicle is being charged and discharged based on the energy storage system. It can (S310).

In this regard, the battery scheduling device may perform charging and discharging of a plurality of batteries included in the energy storage system in an energy storage system, and while each battery is being charged and discharged, a plurality of batteries included in each battery are performed. Corresponding information may be collected by receiving information related to voltages of cells and information related to cell balance.

That is, the energy storage system is a battery scheduling device, and while charging and discharging a plurality of batteries included in the energy storage system, voltage information related to the voltage of a plurality of cells included in each battery and cell balance related information. Balancing information, which is information, may be transmitted.

Here, the first voltage information may refer to information about the voltage state of each cell of a plurality of cells included in the battery of the electric vehicle, which is collected while the battery of the electric vehicle is initially charged and discharged based on the energy storage system. can For example, the information on the voltage state may mean information about the voltage value of each cell and information about the average voltage value of a plurality of cells.

In particular, the first voltage information may mean information about the voltage state of each cell of a plurality of cells according to the value of the charge amount of the battery while the battery of the electric vehicle is initially charged and discharged based on the energy storage system. there is. In other words, the first voltage information may mean information about a voltage state of each cell of a plurality of cells according to a value of a charge amount of a battery that can be classified in a preset unit.

In addition, the first balancing information refers to information about the state of charge of each cell of a plurality of cells included in the battery of the electric vehicle, which is collected while the battery of the electric vehicle is initially charged and discharged based on the energy storage system. can For example, information about the state of charge of a cell may mean information about the value of the amount of charge of each cell and information about the average value of the amount of charge of a plurality of cells.

Thereafter, the battery scheduling device performs first scheduling for determining a first operation period, which means a period in which charging is required for operation of a battery of an electric vehicle, based on the collected first voltage information and the collected first balancing information. It can (S320).

Here, based on the first voltage information and the first balancing information collected by the battery scheduling device, first scheduling is performed to determine a first operation period, which means a period in which charging is required for operation of a battery of an electric vehicle. A specific process of doing can be described in more detail with reference to FIG. 4 below.

4 is a flowchart illustrating a method of performing first scheduling in a battery scheduling method for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system according to an embodiment of the present invention.

Referring to FIG. 4 , a battery scheduling apparatus performing a battery scheduling method for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system according to an embodiment of the present invention is provided for each battery based on first voltage information. The deviation value calculated by calculating the deviation between the voltage values for the cell and the first voltage reference value preset to determine the first operating period may be compared with each other (S321).

Here, the battery scheduling device may calculate an average voltage value between voltage values for each cell identified based on the first voltage information, and based on the calculated average voltage value, a voltage value for each cell. deviation can be calculated. Then, the battery scheduling apparatus may calculate an average deviation value for the calculated deviation value.

Thereafter, the battery scheduling device may compare the calculated average deviation value with a preset first voltage reference value to determine a first operating period. Here, the first operation period may refer to a period in which charging is required for operation of the battery in the entire period in which the battery can be charged, and this may be referred to as an 'operation period' in the present invention.

Thereafter, the battery scheduling device may identify a section in which a deviation is less than a first voltage reference value in all sections in which the battery of the electric vehicle can be charged, and determine the section as a first candidate section for determining the first operating section ( S322).

Here, the battery scheduling device may check the value of the charge amount of the battery corresponding to the time when the calculated deviation value is less than the first voltage reference value, and more specifically, for the range checked through the charge amount of the battery You can check the upper and lower limit values of the interval.

Thereafter, the battery scheduling device sets a first operating section in which charging is required for operating the battery of the electric vehicle in a section corresponding to a range generated through an upper limit value and a lower limit value of the section for the range identified through the charge amount of the battery. It can be determined as the interval of the first candidate for determining.

Thereafter, the battery scheduling device calculates a deviation between the values of the amount of charge for each cell based on the first balancing information and compares the calculated deviation value with a preset first charging reference value to determine the first operating period. It can (S323).

Here, the battery scheduling device may calculate an average charge amount value between values of the charge amount for each cell identified based on the first balancing information, and based on the calculated average charge amount value for each cell The deviation of the value of the filling amount can be calculated. Then, the battery scheduling apparatus may calculate an average deviation value for the calculated deviation value.

Thereafter, the battery scheduling device may compare the calculated average deviation value with a preset first charging reference value to determine a first operating period.

Thereafter, the battery scheduling device may identify a section in which the deviation is less than the first charging reference value in all sections in which the battery of the electric vehicle can be charged, and determine it as a second candidate section for determining the first operation section ( S324).

Here, the battery scheduling device may check the value of the charge amount of the battery corresponding to the time when the calculated deviation value is less than the first charge reference value, and more specifically, for the range checked through the charge amount of the battery You can check the upper and lower limit values of the interval.

Thereafter, the battery scheduling device sets a first operating section in which charging is required for operating the battery of the electric vehicle in a section corresponding to a range generated through an upper limit value and a lower limit value of the section for the range identified through the charge amount of the battery. It can be determined as the interval of the second candidate for determining.

Thereafter, the battery scheduling apparatus sets the average value between the upper limit value of the intervals of the first candidate and the upper limit value of the intervals of the second candidate as the upper limit value, and the lower limit value of the intervals of the first candidate and the lower limit value of the intervals of the second candidate as the lower limit value. A period of value may be determined as the first operating period (S325).

In detail, the battery scheduling device may check an upper limit value of the charge amount forming the first candidate interval and an upper limit value of the charge amount forming the second candidate interval. Thereafter, the battery scheduling device may calculate an average charge amount value between an upper limit value of charge amount values forming the first candidate section and an upper limit value of charge amount values forming the second candidate section. .

Thereafter, the battery scheduling device calculates the average charge amount value between the upper limit value of the charge amount values forming the first candidate interval and the upper limit value of the charge amount values forming the second candidate interval of the battery It may be determined as the upper limit value of the first operation period in which charging is required for operation.

Thereafter, the battery scheduling device may check a lower limit value for the charge amount values forming the first candidate interval and a lower limit value for the charge amount values forming the second candidate interval. Thereafter, the battery scheduling device may calculate an average charge amount value between a lower limit value of charge amount values forming the first candidate section and a lower limit value of charge amount values forming the second candidate section. .

Thereafter, the battery scheduling device calculates the average charge amount value between the lower limit value of the charge amount values forming the first candidate interval and the lower limit value of the charge amount values forming the second candidate interval, It may be determined as the lower limit value of the first operation period in which charging is required for operation.

Thereafter, the battery scheduling device is required to charge a section corresponding to a range that can be formed based on the upper limit value and the lower limit value determined based on the first voltage information and the first balancing information to operate the battery of the electric vehicle. It may be determined as the first operation section meaning a section.

That is, the battery scheduling apparatus may perform first scheduling for determining a first operation period, which means a period in which charging is required for operation of the battery of the electric vehicle, through the method described with reference to FIG. 4 .

Again, referring to FIG. 3 , a battery scheduling apparatus performing a battery scheduling method for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system according to an embodiment of the present invention is based on a first scheduling result While the battery is operating in the energy storage system, second voltage information related to the voltage of the battery and second balancing information related to cell balance may be collected (S330).

In this regard, the battery scheduling device may control at least one battery among the plurality of batteries to operate based on a first scheduling result for the plurality of batteries included in the energy storage system in the energy storage system, Corresponding information may be collected by receiving voltage-related information and cell balance-related information of a plurality of cells included in each battery while each battery is operated.

That is, the energy storage system is a battery scheduling device, and voltage information, which is information related to voltages of a plurality of cells included in each battery, during operation based on a first scheduling result for a plurality of batteries included in the energy storage system, and Balancing information, which is information related to cell balance, may be transmitted.

Here, the second voltage information may refer to information about the voltage state of each cell of a plurality of cells included in the battery of the electric vehicle, which is collected while the battery is operating in the energy storage system based on the first scheduling result. . For example, the information on the voltage state may mean information about the voltage value of each cell and information about the average voltage value of a plurality of cells.

In particular, the second voltage information is information about the voltage state of each cell of a plurality of cells according to the value of the charge amount of the battery while the battery of the electric vehicle is operating based on the first scheduling result based on the energy storage system. can mean In other words, the second voltage information may refer to information about a voltage state of each cell of a plurality of cells according to a value of a charge amount of a battery that may be classified in a preset unit.

In addition, the second balancing information may refer to information about a state of charge of each cell of a plurality of cells included in a battery of an electric vehicle, which is collected while the battery is operated in the energy storage system based on a result of the first scheduling. . For example, information about the state of charge of a cell may mean information about the value of the amount of charge of each cell and information about the average value of the amount of charge of a plurality of cells.

Thereafter, the battery scheduling device may generate correction information related to a degree of correction required for a first operation period, which is a period in which charging is required for operation of the battery, based on the collected second voltage information and second balancing information. (S340).

Here, based on the second voltage information and the second balancing information collected by the battery scheduling device, a specific process of generating correction information related to the degree of correction required for the first operation period, which is a period in which charging is required for operation of the battery may be described in more detail with reference to FIG. 5 below.

5 is a flowchart illustrating a method of generating correction information in a battery scheduling method for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system according to an embodiment of the present invention.

Referring to FIG. 5 , a battery scheduling apparatus for performing a battery scheduling method for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system according to an embodiment of the present invention is provided for each battery based on second voltage information. In order to determine a value of the deviation calculated by calculating the deviation between the voltage values for the cells and a value requiring correction for the first operating period, a preset second voltage reference value may be compared with each other (S341).

Here, the battery scheduling device may calculate an average voltage value between voltage values for each cell identified based on the second voltage information, and based on the calculated average voltage value, a voltage value for each cell. deviation can be calculated. Then, the battery scheduling apparatus may calculate an average deviation value for the calculated deviation value.

Thereafter, the battery scheduling device may compare the calculated average deviation value with a preset second voltage reference value to determine a value for which correction is required for the first operating period. Here, the method of comparing the average deviation value calculated by the battery scheduling device with the preset first voltage reference value may be similar to or identical to that of the method.

Thereafter, the battery scheduling device may determine a value requiring correction for the first operation period according to the second voltage information based on the comparison result, and determine the determined value as a first correction value for correcting the first operation period ( S342).

That is, the battery scheduling device may check the value of the charge amount of the battery corresponding to the time when the calculated average deviation value is less than the second voltage reference value, and more specifically, within the range identified through the charge amount of the battery You can check the upper and lower limit values of the interval.

Thereafter, the battery scheduling device may compare the first operating period with a period corresponding to a range generated through an upper limit value and a lower limit value of the range for the range identified through the amount of charge of the battery. Thereafter, the battery scheduling device may determine a difference between a first operating period and a period corresponding to a range generated through the upper limit value and the lower limit value of the range for the range identified through the amount of charge of the battery as a first correction value. there is.

Specifically, the battery scheduling device may calculate the difference between the upper limit value of the range for the range identified through the charge amount of the battery and the upper limit value of the first operating interval, and calculate the difference to the upper limit value of the first operating interval. It can be determined as a value that needs to be corrected for. In addition, the difference between the lower limit value of the range for the range identified through the charge amount of the battery scheduling battery and the lower limit value of the first operating interval can be calculated, and the calculated difference is corrected for the lower limit value of the first operating interval You can determine the value you need.

Thereafter, the battery scheduling device determines a value requiring correction for the upper limit value of the first operating interval and a value requiring correction for the lower limit value of the first operating interval as a first correction value, which is a value requiring correction for the first operating interval. can

Thereafter, the battery scheduling device calculates the deviation between the values of the amount of charge for each cell based on the second balancing information, and determines the value of the deviation and the value that needs to be corrected for the first operating period. Charging reference values may be compared with each other (S343).

Here, the battery scheduling device may calculate an average charge amount value between values of the charge amount for each cell identified based on the second balancing information, and based on the calculated average charge amount value for each cell The deviation of the value of the filling amount can be calculated. Then, the battery scheduling apparatus may calculate an average deviation value for the calculated deviation value.

Thereafter, the battery scheduling device may compare the calculated average deviation value with a preset second charging reference value to determine a value requiring correction for the first operating period. Here, the method of comparing the average deviation value calculated by the battery scheduling device with the preset first charging reference value may be similar to or identical to that of the method.

Thereafter, the battery scheduling device may determine a value requiring correction for the first operating period according to the second balancing information based on the comparison result, and determine the determined value as a second correction value for correcting the first operating period ( S344).

That is, the battery scheduling device may check the value of the charge amount of the battery corresponding to the time when the calculated average deviation value is less than the second charge reference value, and more specifically, within the range identified through the charge amount of the battery You can check the upper and lower limit values of the interval for

Thereafter, the battery scheduling device may compare the first operating period with a period corresponding to a range generated through an upper limit value and a lower limit value of the range for the range identified through the amount of charge of the battery. Thereafter, the battery scheduling device may determine the difference between the first operation section and the section corresponding to the range generated through the upper limit value and the lower limit value of the section for the range identified through the amount of charge of the battery as a second correction value. there is.

Specifically, the battery scheduling device may calculate the difference between the upper limit value of the range for the range identified through the charge amount of the battery and the upper limit value of the first operating interval, and calculate the difference to the upper limit value of the first operating interval. It can be determined as a value that needs to be corrected for. In addition, the difference between the lower limit value of the range for the range identified through the charge amount of the battery scheduling battery and the lower limit value of the first operating interval may be calculated, and the calculated difference is corrected for the lower limit value of the first operating interval You can determine the value you need.

Thereafter, the battery scheduling device determines a value requiring correction for the upper limit value of the first operation period and a value requiring correction for the lower limit value of the first operation period as a second correction value that is a value requiring correction for the first operation period. can

Thereafter, the battery scheduling device performs an average value between an upper limit value included in the first correction value and an upper limit value included in the second correction value, and an average value between a lower limit value included in the first correction value and a lower limit value included in the second correction value. A value may be calculated and generated as correction information (S345).

Specifically, the battery scheduling device may calculate an average value between an upper limit value of the first correction value and an upper limit value of the second correction value, and an average value between the lower limit value of the first correction value and the lower limit value of the second correction value. can be calculated. Then, the battery scheduling device may generate the calculated average value of the upper limit value and the calculated average value of the lower limit value as correction information.

Again, referring to FIG. 3 , a battery scheduling device performing a battery scheduling method for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system according to an embodiment of the present invention is based on generated correction information Second scheduling may be performed to determine a second operation period by correcting the first operation period in which charging is required to operate the battery of the electric vehicle (S350).

Specifically, the battery scheduling device may perform second scheduling for determining the first operating period as the second operating period based on the correction information, and more specifically, the upper limit value and the lower limit value included in the correction information are determined as the interval. Second scheduling may be performed to determine a second operation period indicating a period in which charging is required to operate the battery of the electric vehicle.

Thereafter, the battery scheduling device may control the battery of the electric vehicle so that power is provided to the outside through the battery of the electric vehicle in the energy storage system based on the second scheduling result (S360).

That is, the battery scheduling device may transmit information on the second scheduling result to the energy storage system interlocked with the battery battery scheduling device, and the energy storage system may support the battery to be controlled based on the information on the second scheduling result. .

Hereinafter, an operation period determined in a battery scheduling method for performing scheduling for operation of a battery of an electric vehicle based on the energy storage system according to an embodiment of the present invention described with reference to FIGS. 1 to 5 is illustrated. It can be described in more detail with reference to 6.

6 is a conceptual diagram illustrating an operation period determined through a battery scheduling method for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system according to an embodiment of the present invention.

Referring to FIG. 6 , a battery scheduling apparatus for performing scheduling for operation of a battery of an electric vehicle based on an energy storage system according to an embodiment of the present invention is a battery of a battery as described with reference to FIGS. 1 to 5 . It is possible to determine an operating section in which charging is required for operation.

In this case, the operation period may mean a period actually used for operation of the battery through charging of the battery, and may be expressed as shown in FIG. 6 in more detail. According to FIG. 6 (a), the operation period initially determined for the battery can be expressed as a 'safe area', and the value obtained by increasing the battery by a preset value from the lower limit value of the period in which the battery can be charged is determined as the lower limit value. In addition, a value obtained by decreasing the upper limit value of the interval in which the battery can be charged by a preset value may be determined as the upper limit value.

After that, according to FIG. 6(b), in the process of operating through the use of a battery, the safety area (ie, operating period) can be determined again in consideration of the voltage state and cell balancing state of a plurality of cells included in the battery. To this end, in the present invention, the safety area may be determined again by applying the method described with reference to FIGS. 1 to 5 .

Through this, as shown in FIG. 6(b), a value increased by a preset value from the lower limit value of the safety area initially determined for the battery can be determined as the lower limit value, and the lower limit value of the safety area initially determined for the battery A value reduced by a preset value from the upper limit value may be determined as the upper limit value.

For example, according to FIG. 6(a), the operation section may be determined by determining 80% of the entire chargeable section of the battery as a safe area, and according to FIG. 6(b), 70% of the entire chargeable section of the battery The operating section can be determined by judging % as a safe area.

The battery scheduling apparatus for performing scheduling for operation of the battery of an electric vehicle based on the energy storage system of the present invention through the method described above determines the voltage state and cell balancing state of the battery in the course of operation through the use of the battery. Taking this into consideration, it is possible to efficiently determine a section for operating the battery.

The methods according to the present invention may be implemented in the form of program instructions that can be executed by various computer means and recorded on a computer readable medium. Computer readable media may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on a computer readable medium may be specially designed and configured for the present invention or may be known and usable to those skilled in computer software.

Examples of computer readable media may include hardware devices specially configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like.

In particular, examples of program instructions may include not only machine code generated by a compiler but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate with at least one software module to perform the operations of the present invention, and vice versa.

In addition, the above-described method or device may be implemented by combining all or some of its components or functions, or may be implemented separately.

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art will variously modify and change the present invention within the scope not departing from the spirit and scope of the present invention described in the claims below. You will understand that it can be done.

100: energy storage system 200: battery scheduling device
300: battery scheduling device 310: processor
320: memory 330: transmitting and receiving device
340: input interface device 350: output interface device
360 storage device 370 bus

Claims (9)

A battery scheduling method performed in a battery scheduling device that performs scheduling for operation of a battery of an electric vehicle based on an energy storage system (ESS),
Collecting first voltage information related to a voltage of the battery and first balancing information related to cell balance while the battery of the electric vehicle is being charged and discharged based on the energy storage system;
Performing first scheduling for determining a first operation period, which means a period in which charging is required for operation of a battery of the electric vehicle, based on the collected first voltage information and the collected first balancing information;
collecting second voltage information related to a voltage of the battery and second balancing information related to a cell balance while the battery is operated in the energy storage system based on a result of the first scheduling;
generating correction information related to a degree of correction required for the first operation period, which is a period in which charging is required for operation of the battery, based on the collected second voltage information and the second balancing information;
performing a second scheduling of determining a second operation period by correcting the first operation period in which charging is required to operate the battery of the electric vehicle based on the generated correction information; and
and controlling a battery of the electric vehicle so that power is provided to the outside through the battery of the electric vehicle in the energy storage system based on the second scheduling result. The method of claim 1,
The first voltage information,
Characterized in that the information on the voltage state of each cell for a plurality of cells included in the battery of the electric vehicle collected while the battery of the electric vehicle is initially charged and discharged based on the energy storage system , the battery scheduling method. The method of claim 2,
The first balancing information,
Characterized in that information on the state of charge of each cell for a plurality of cells included in the battery of the electric vehicle collected while the battery of the electric vehicle is initially charged and discharged based on the energy storage system , the battery scheduling method. The method of claim 3,
The step of performing the first scheduling,
Calculating a deviation between voltage values for each cell based on the first voltage information and comparing the calculated deviation value with a preset first voltage reference value to determine the first operating period;
determining an interval in which the deviation is less than the first voltage reference value among all intervals in which the battery of the electric vehicle can be charged, as a first candidate interval for determining the first operating interval;
Calculating a deviation between values of the charging amount for each cell based on the first balancing information and comparing the calculated deviation value with a preset first charging reference value to determine the first operating period;
determining an interval in which the deviation is less than the first charging reference value as a second candidate interval for determining the first operation interval; and
The average value between the upper limit value of the intervals of the first candidate and the upper limit value of the intervals of the second candidate is the upper limit value, and the lower limit value of the intervals of the first candidate and the lower limit value of the intervals of the second candidate are the lower limit value. And determining a period as the first operating period. The method of claim 4,
The second voltage information,
Characterized in that information on the voltage state of each cell of a plurality of cells included in the battery of the electric vehicle collected while the battery is operated in the energy storage system based on the first scheduling result, Battery scheduling method. The method of claim 5,
The second balancing information,
Characterized in that, based on the first scheduling result, information about the state of charge of each cell of a plurality of cells included in the battery of the electric vehicle collected while the battery is operating in the energy storage system, Battery scheduling method. The method of claim 6,
Generating the correction information,
Based on the second voltage information, a preset second voltage reference value is used to determine the calculated deviation value by calculating the deviation between the voltage values for each cell and a value requiring correction for the first operating section. comparing each other;
determining a value to be corrected for the first operating period according to the second voltage information based on the comparison result, and determining the determined value as a first correction value for correcting the first operating period;
A second charging reference value preset to determine a value of the deviation calculated by calculating a deviation between values of the charging amount for each cell based on the second balancing information and a value requiring correction for the first operating section Comparing them with each other;
Determining a value requiring correction for the first operating interval according to the second balancing information based on the comparison result, and determining the determined value as a second correction value for correcting the first operating interval; and
An average value between the upper limit value included in the first correction value and the upper limit value included in the second correction value, and an average value between the lower limit value included in the first correction value and the lower limit value included in the second correction value are calculated Characterized in that it comprises the step of generating the correction information, the battery scheduling method. The method of claim 7,
Performing the second scheduling,
Characterized in that performing the second scheduling for determining the upper limit value and the lower limit value included in the correction information as a second operating period indicating a period in which charging is required for operation of the battery of the electric vehicle, Battery scheduling method. A battery scheduling device that performs scheduling for the operation of a battery of an electric vehicle based on an energy storage system (ESS),
processor; and
including a memory in which at least one instruction executed by the processor is stored;
The at least one command,
Collecting first voltage information related to a voltage of the battery and first balancing information related to cell balance while the battery of the electric vehicle is being charged and discharged based on the energy storage system;
Performing first scheduling for determining a first operation period, which means a period in which charging is required for operation of a battery of the electric vehicle, based on the collected first voltage information and the collected first balancing information;
Collecting second voltage information related to a voltage of the battery and second balancing information related to cell balance while the battery is operated in the energy storage system based on a result of the first scheduling;
Based on the collected second voltage information and the second balancing information, generating correction information related to a degree of correction required for the first operation period, which is a period in which charging is required for operation of the battery;
performing a second scheduling for determining a second operating period by correcting the first operation period in which charging is required for operation of the battery of the electric vehicle based on the generated correction information; and
Based on the second scheduling result, the battery scheduling device is executed to control the battery of the electric vehicle so that power is provided to the outside through the battery of the electric vehicle in the energy storage system.

Images