KR-20260064153-A - BATTERY SYSTEM, BATERRY MANAGEMENT APPARATUS, AND OPERATING METHOD OF BATTERY MANAGEMENT APPARATUS

KR20260064153AKR 20260064153 AKR20260064153 AKR 20260064153AKR-20260064153-A

Abstract

A battery system according to an embodiment of the present disclosure comprises a battery device including one or more batteries, a pressure regulator that applies pressure to one or more batteries of the battery device based on a pressure control signal, a displacement sensor that detects the displacement of one or more batteries, and a battery management device that generates a pressure control signal to maintain a static pressure environment for one or more batteries, performs charging or discharging for one or more batteries, receives displacement data generated through detection by the displacement sensor, generates calculation data based on the displacement data, and determines the performance of one or more batteries based on the calculation data.

Inventors

장지수
김현정
민정아
이진아
김리율
임영준
양원주
문진희

Assignees

삼성에스디아이 주식회사

Dates

Publication Date: 20260507
Application Date: 20241031

Claims (20)

A battery device comprising one or more batteries; A pressure regulating device that applies pressure to one or more batteries of the battery device based on a pressure control signal; A displacement sensor for detecting the displacement of one or more of the above batteries; and A battery system comprising a battery management device that generates a pressure control signal to maintain a static pressure environment for one or more batteries, performs charging or discharging for one or more batteries, receives displacement data generated through detection by the displacement sensor, generates calculation data based on the displacement data, and determines the performance of one or more batteries based on the calculation data.
In paragraph 1, The above-mentioned calculated data is a battery system comprising an increase in displacement due to charging of one or more batteries and a decrease in displacement due to discharging of one or more batteries.
In paragraph 2, The above-mentioned calculated data includes a change in the amount of displacement reduction over the lifespan of the one or more batteries, and The above battery management device is a battery system that determines the state of health (SOH) of one or more batteries based on a change in the amount of displacement reduction.
In paragraph 2, The above-mentioned calculation data includes the ratio of the displacement reduction amount to the displacement increase amount of the one or more batteries, and The battery management device is a battery system that determines the Coulomb efficiency of one or more batteries based on the ratio of the displacement decrease amount to the displacement increase amount.
In paragraph 2, The above-mentioned calculation data includes at least one of the rate of change of the increase in displacement per hour or the rate of change of the decrease in displacement per hour, and The battery management device is a battery system that determines the state of a metal layer included in one or more batteries based on at least one of the rate of change of the increase in displacement per hour or the rate of change of the decrease in displacement per hour.
In paragraph 2, The above-mentioned calculation data includes at least one of the rate of change of the displacement increase per capacity or the rate of change of the displacement decrease per capacity of the one or more batteries, and The battery management device is a battery system that determines the state of a metal layer included in one or more batteries based on at least one of the rate of change of the displacement increase per capacity or the rate of change of the displacement decrease per capacity.
In paragraph 1, A battery system that determines whether the performance of one or more batteries is satisfied based on the above-described data, determines the state of the one or more batteries as normal in response to the determination that the performance of the one or more batteries is satisfied, and performs conditioning on the one or more batteries in response to the determination that the performance of the one or more batteries is not satisfied.
In Paragraph 7, The battery management device is a battery system that determines that the performance of the one or more batteries is not satisfied in response to the rate of change of the hourly displacement increase of the one or more batteries being greater than a preset threshold value.
In Paragraph 7, The battery management device calculates a Coulomb efficiency based on the current and current application time of the one or more batteries, and The battery management device above calculates a displacement increase/decrease ratio based on the difference in the ratio of the displacement decrease amount to the displacement increase amount of the one or more batteries, and A battery system in which the battery management device determines that the performance of one or more batteries is not satisfied in response to the difference between the Coulomb efficiency and the displacement increase/decrease ratio being greater than a preset threshold value.
In Paragraph 7, A battery system in which the battery management device determines whether performance is satisfied based on output data of the one or more batteries generated according to the performance of the conditioning, determines the state of the one or more batteries as normal in response to the determination that the performance of the one or more batteries is satisfied, and determines the state of the one or more batteries as abnormal in response to the determination that the performance of the one or more batteries is not satisfied.
In paragraph 1, The above battery device further includes a plurality of plates, and The plurality of plates and the one or more batteries are arranged alternately, The above pressure regulating device is a battery system that applies pressure to a first plate among the plurality of plates.
In Paragraph 11, The above pressure regulating device is a battery system comprising a servo motor disposed on one side of the first plate to apply pressure to the first plate, and a load cell disposed on one side of the second plate disposed on the opposite side of the first plate to detect pressure applied to the second plate.
In Paragraph 11, The above pressure regulating device is a battery system comprising a spring that regulates the spring constant based on a spring constant control signal and a spring pad disposed on one side of the first plate that applies pressure to the first plate.
A pressure control unit that outputs a pressure control signal for controlling a pressure regulator to provide a constant pressure environment to one or more batteries; A data receiving unit for receiving displacement data regarding one or more of the above batteries; A calculation unit that generates calculation data based on the above displacement data; and A battery management device comprising a judgment unit that determines the performance of one or more batteries based on the above-mentioned output data.
In Paragraph 14, The above-described operation unit is a battery management device that generates an increase in displacement corresponding to the charging of the one or more batteries and a decrease in displacement corresponding to the discharging of the one or more batteries.
In Paragraph 14, The above operation unit generates a rate of change of the increase in displacement per hour or a rate of change of the decrease in displacement per hour, and A battery management device in which the above-mentioned judgment unit determines that the performance of the one or more batteries is not satisfied in response to at least one of the rate of change of the displacement increase amount or the rate of change of the displacement decrease amount being greater than a preset threshold value.
In Paragraph 14, The above calculation unit calculates Coulomb efficiency based on the current and application time applied to the one or more batteries, and The above calculation unit calculates a displacement increase/decrease ratio based on the ratio of the displacement decrease amount to the displacement increase amount of the one or more batteries, and A battery management device in which the above-described judgment unit determines that the performance of one or more batteries is not satisfied in response to the difference between the above-described Coulomb efficiency and the above-described displacement increase/decrease ratio being greater than a preset threshold value.
A step of outputting a pressure control signal to control a pressure regulator to provide a positive pressure environment to one or more batteries by means of a pressure control unit; A step of receiving displacement data regarding one or more batteries by a data receiving unit; A step of generating output data based on the displacement data by the operation unit; A method of operating a battery management device comprising the step of determining the performance of one or more batteries based on the above-determined output data by a judgment unit.
In Paragraph 18, The step of generating the above-mentioned output data is, By the above-mentioned operation unit, the operation unit includes the step of generating a rate of change of the increase in displacement per hour or a rate of change of the decrease in displacement per hour, and The step of determining the performance of one or more of the above batteries is, A method of operating a battery management device comprising the step of determining, by the above-determining unit, that the performance of one or more batteries is not satisfied in response to at least one of the rate of change of the displacement increase amount or the rate of change of the displacement decrease amount being greater than a preset threshold value.
In Paragraph 18, The step of generating the above-mentioned output data is, A step of calculating Coulomb efficiency based on the current and application time applied to the one or more batteries by the above calculation unit; and The above calculation unit calculates the displacement increase/decrease ratio based on the ratio of the displacement decrease amount to the displacement increase amount of the one or more batteries, and The step of determining the performance of one or more of the above batteries is, A method of operation of a battery management device that determines, by the above-determined judgment unit, that the performance of one or more batteries is not satisfied in response to the difference between the Coulomb efficiency and the displacement increase/decrease ratio being greater than a preset threshold value.

Description

Battery System, Battery Management Apparatus, and Operating Method of Battery Management Apparatus The present disclosure relates to a battery, and specifically to a battery system for managing a battery including an all-solid-state battery, a battery management device, and a method of operating the battery management device. After assembling a battery including an all-solid-state battery, a charge-discharge cycle is performed, and the characteristics of the battery are evaluated based on the charge and discharge. Before assembly, abnormalities can be determined by checking the condition of the electrode plates included in the all-solid-state battery; however, after assembly, abnormalities are determined based on the battery's capacity or impedance calculated from the voltage and current during the charge-discharge cycle. However, this is limited to considering the actual condition of the metal layer of the all-solid-state battery included in the battery. A battery performance evaluation system is required to determine the state of a battery by considering the state of the metal layer of an all-solid-state battery. FIG. 1 is a block diagram showing a battery performance evaluation system according to an embodiment of the present disclosure. FIGS. 2a to 2c are cross-sectional views of an all-solid-state battery according to embodiments of the present disclosure. FIG. 3 is a block diagram showing a battery determination system according to an embodiment of the present disclosure. FIG. 4 is a drawing showing an example of a battery charging and discharging device according to an embodiment of the present disclosure. FIG. 5 is a diagram showing an example of the operation of a battery charging and discharging device according to an embodiment of the present disclosure. FIG. 6 is a diagram exemplarily showing the metal yield calculated per charge-discharge cycle according to an embodiment of the present disclosure. FIG. 7 is a diagram exemplarily showing a displacement detection point of a battery charging and discharging device according to an embodiment of the present disclosure. FIG. 8 is a diagram showing the distribution of displacements detected at each of the displacement detection points of the batteries according to an embodiment of the present disclosure. FIG. 9 is a flowchart illustrating the operation method of a battery determination system according to an embodiment of the present disclosure. FIG. 10 is a drawing showing an example of the operation of a battery charging and discharging device according to an embodiment of the present disclosure. FIG. 11 is a diagram exemplarily showing the pressure detected per charge-discharge cycle according to an embodiment of the present disclosure. FIG. 12 is a diagram exemplarily showing a pressure sensing point according to an embodiment of the present disclosure. FIG. 13 is a diagram showing the distribution of pressure detected at each of the pressure sensing points of the batteries according to an embodiment of the present disclosure. FIG. 14 is a flowchart illustrating the operation method of a battery determination system according to an embodiment of the present disclosure. FIG. 15 is a block diagram showing a battery system according to an embodiment of the present disclosure. FIG. 16 is a block diagram showing a battery management device according to an embodiment of the present disclosure. FIG. 17 is a drawing showing an example of a battery device according to an embodiment of the present disclosure. FIG. 18 is a drawing showing another example of a battery device according to an embodiment of the present disclosure. FIG. 19 is a drawing exemplarily showing a displacement detection point of a battery device according to an embodiment of the present disclosure. FIG. 20 is a flowchart illustrating the operation method of a battery management device according to an embodiment of the present disclosure. FIG. 21 is a graph showing the rate of change of displacement per hour calculated according to an embodiment of the present disclosure. FIGS. 22a and 22b are graphs showing a comparison of the ratio of the displacement reduction amount to the calculated displacement increase amount according to an embodiment of the present disclosure and the Coulomb efficiency. FIG. 23 is a drawing showing an example of a battery device according to an embodiment of the present disclosure. FIG. 24 is a drawing showing an example of a battery device according to an embodiment of the present disclosure. FIG. 25 is a flowchart illustrating the operation method of a battery management device according to an embodiment of the present disclosure. In order to fully understand the structure and effects of the present invention, preferred embodiments of the present invention are described with reference to the attached drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various forms and various modifications can