KR-20260064173-A - BATTERY EVALUATION SYSTEM, BATERRY EVALUATION DEVICE, AND OPERATING METHOD OF BATTERY EVALUATION SYSTEM

Abstract

A battery determination system according to an embodiment of the present disclosure may include a battery charging/discharging device that performs at least one charge-discharge cycle to determine whether one or more batteries provided in a positive displacement environment are abnormal, and detects pressure resulting from the charging or discharging of one or more batteries, and a battery determination device that receives pressure data from the battery charging/discharging device, generates calculation data based on the pressure data, and determines whether one or more batteries are abnormal based on the calculation data.

Inventors

• 김현정
• 장지수
• 이진아
• 김리율
• 임영준
• 양원주
• 문진희
• 김가은
• 류수열

Assignees

• 삼성에스디아이 주식회사

Dates

Publication Date

20260507

Application Date

20241031

Claims (20)

1. A battery charging/discharging device that performs at least one charge-discharge cycle to determine whether one or more batteries provided in a positive displacement environment are abnormal, and detects pressure resulting from the charging or discharging of said one or more batteries; and A battery determination system comprising a battery determination device that receives pressure data from the battery charging/discharging device, generates calculation data based on the pressure data, and determines whether one or more batteries are abnormal based on the calculation data.
2. In paragraph 1, The above-mentioned output data is a battery determination system comprising a pressure increase amount corresponding to the charging of one or more batteries and a pressure decrease amount corresponding to the discharging of one or more batteries.
3. In paragraph 2, The above-mentioned output data is a battery determination system including a charge-discharge efficiency determined based on the ratio of the pressure increase amount and the pressure.
4. In paragraph 2, The above output data is a battery determination system including the amount of irreversible metal generated, which is estimated by the difference between the amount of pressure increase and the amount of pressure decrease in the first charge-discharge cycle.
5. In paragraph 2, The above battery determination device is a battery determination system that determines whether a battery is abnormal based on the ratio of the pressure increase of each of the plurality of batteries to the average pressure increase of the plurality of batteries.
6. In paragraph 2, The above battery determination device is a battery determination system that determines the state of health (SOH) of one or more batteries based on the trend of change of the pressure increase amount in the first charge-discharge cycle and the pressure decrease amount in the nth (n is an integer greater than 1) charge-discharge cycle.
7. In paragraph 6, The above battery determination device is a battery determination system that determines the state of one or more batteries as abnormal based on the fact that the SOH is smaller than a preset threshold value.
8. In paragraph 1, The battery charging and discharging device detects multiple pressures at each of a plurality of pressure sensing points for each of the one or more batteries, and The above battery determination device is a battery determination system that determines whether each of one or more batteries is abnormal based on the plurality of pressures.
9. In paragraph 1, The battery charging/discharging device comprises a plurality of partitions, one or more battery storage spaces formed between the plurality of partitions, a plurality of connection terminals electrically connected to the one or more batteries, a plurality of pressure sensors disposed between each of the plurality of partitions and the battery storage spaces, and a pressure regulator that applies pressure to one side of a first partition among the plurality of partitions based on a pressure control signal.
10. In Paragraph 9, The above pressure regulator is a battery determination system comprising at least one of a servo motor or a spring pad.
11. In Paragraph 9, The above pressure sensor is a battery determination system that senses the pressure of each of a plurality of pressure sensing points.
12. In Paragraph 9, A battery determination system in which the pressure regulator provides a preset pressure to the first partition, and each of the plurality of partitions is fixed to maintain positive displacement.
13. A data receiving unit that receives pressure data including the pressure of one or more batteries during at least one charge-discharge cycle performed in a positive displacement environment; A calculation unit that generates calculation data based on the above pressure data; A battery determination device comprising a determination unit that determines whether one or more of the batteries are abnormal based on the above-mentioned output data.
14. In Paragraph 13, The above-mentioned output data is a battery determination device comprising a pressure increase amount corresponding to the charging of one or more batteries and a pressure decrease amount corresponding to the discharging of one or more batteries.
15. In Paragraph 14, The above calculation unit calculates the charge-discharge efficiency based on the ratio of the pressure increase amount and the pressure decrease amount, and The above-mentioned judgment unit is a battery judgment device that determines whether one or more of the batteries are abnormal based on the charge-discharge efficiency.
16. In Paragraph 14, The above-mentioned operation unit estimates the amount of irreversible metal generated based on the difference between the pressure increase and pressure decrease in the first charge-discharge cycle, and The above-mentioned judgment unit is a battery judgment device that determines whether one or more of the batteries are abnormal based on the amount of irreversible metal generated.
17. A step of performing at least one charge-discharge cycle on one or more batteries in a positive displacement environment by means of a battery charge-discharge device; A step of detecting the pressure of one or more batteries by means of a battery charging/discharging device; A step of generating output data based on the pressure of one or more batteries by a battery determination device; and A method of operating a battery determination system comprising the step of determining whether one or more batteries are abnormal based on the calculated data by a battery determination device.
18. In Paragraph 17, The step of generating the above-mentioned output data is, A step of calculating a pressure increase amount corresponding to the charging of one or more of the above batteries; and A method of operating a battery determination system comprising the step of calculating a pressure reduction amount corresponding to the discharge of one or more of the above batteries.
19. In Paragraph 18, The step of generating the above-mentioned output data is, The method includes the step of generating a charge-discharge efficiency based on the ratio of the pressure increase amount and the pressure decrease amount, and The step of determining whether the above one or more batteries are abnormal is, A method of operating a battery determination system comprising the step of determining whether one or more batteries are abnormal based on the charge-discharge efficiency.
20. In Paragraph 18, The step of generating the above-mentioned output data is, Estimating the amount of irreversible metal generated based on the difference between the pressure increase and pressure decrease in the first charge-discharge cycle, and The step of determining whether one or more of the above batteries are abnormal is: A method of operation of a battery determination system for determining whether one or more batteries are abnormal based on the amount of irreversible metal generated.

Description

Battery evaluation system, battery evaluation device, and operating method of battery evaluation system The present disclosure relates to a battery determination system, and more specifically, to a battery determination system for determining whether a battery including an all-solid-state battery is abnormal, a battery determination device, and a method of operating the battery determination system. 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 determination system capable of determining whether a battery is abnormal by considering the condition of the metal layer of an all-solid-state battery is required. 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