JP-2026514500-A - Battery testing device and battery testing method

JP2026514500AJP 2026514500 AJP2026514500 AJP 2026514500AJP-2026514500-A

Abstract

The battery test apparatus disclosed herein includes a communication unit that receives battery data from a battery cell, and a control unit that determines a verification driving pattern for the battery cell, tests the battery cell using the verification driving pattern to acquire test data, and compares the standard capacity change rate and resistance change rate of a first driving mode and a second driving mode, respectively, obtained based on the test data, to determine the degree of influence on the battery cell's lifespan.

Inventors

ジ・ヒョン・イ
ユン・スン・キム
ジョン・ミン・イ
ヒョン・ジュン・ノ

Assignees

エルジーエナジーソリューションリミテッド

Dates

Publication Date: 20260511
Application Date: 20241220
Priority Date: 20231227

Claims (17)

A communication unit that acquires battery data from the battery cells, A battery test apparatus comprising: a control unit that determines a verification driving pattern for testing the battery cell, acquires test data reflecting the temperature deviation of the battery cell, acquires the standard capacity change rate and resistance change rate of the battery cell in a first driving mode and a second driving mode, respectively, based on the test data, and determines the degree of influence on the battery cell's lifespan by comparing the standard capacity change rate and the resistance change rate.
The control unit, The battery test apparatus according to claim 1, which compares the standard capacity change rate and the resistance change rate based on the fact that the temperature deviation of the battery cells in the first driving mode and the second driving mode is greater than or equal to a reference deviation.
The control unit, The battery test apparatus according to claim 2, wherein the degree of impact on the lifespan of the battery cell is determined based on the fact that the time during which the temperature deviation exceeds the reference deviation is equal to or greater than the reference time.
The control unit, The battery test apparatus according to claim 3, which determines the lifespan impact based on whether the conditions for stopping the operation of the battery cell are met within the aforementioned reference time.
The control unit, The battery test apparatus according to claim 1, which obtains the test data from a simulation kit including multiple temperature sensors.
The control unit, The battery test apparatus according to claim 5, which obtains the test data from the simulation kit, which includes a heating pad formed to cause one side of the battery cell to reach a preset first critical temperature, and a cooling line formed to cause the other side of the battery cell to reach a preset second critical temperature.
The control unit, The battery test apparatus according to claim 6, wherein the simulation kit is provided with insulating pads for maintaining the temperature of the battery cells above a certain temperature so as to surround the battery cells, and the test data is obtained from the simulation kit.
The aforementioned verification driving pattern is: The battery test apparatus according to claim 1, including a driving pattern in which the battery cell is driven at maximum output within the drivable range of the battery cell.
Battery data is obtained from the battery cells, Determine the verification driving pattern for testing the aforementioned battery cell. Test data is obtained that reflects the temperature deviation of the aforementioned battery cells. Based on the aforementioned test data, the standard capacity change rate and resistance change rate of the battery cell in the first driving mode and the second driving mode are obtained, A battery testing method comprising determining the degree of impact on the battery cell's lifespan by comparing the standard capacity change rate and the resistance change rate.
The battery cells included in the battery module, A simulation kit for reflecting the temperature deviation of the aforementioned battery cells, A battery test system comprising: a battery test device that obtains test data by testing the battery cell in a verification driving pattern while reflecting the temperature deviation; obtains the standard capacity change rate and resistance change rate of the battery cell in a first driving mode and a second driving mode, respectively, based on the test data; and determines the degree of impact on the battery cell's lifespan in a first driving mode and a second driving mode, respectively, by comparing the standard capacity change rate and resistance change rate.
The aforementioned battery test device is The battery test system according to claim 10, wherein the standard capacity change rate and the resistance change rate are compared based on the fact that the temperature deviation of the battery cells in the first driving mode and the second driving mode is greater than or equal to a reference deviation.
The aforementioned battery test device is The battery test system according to claim 11, wherein the degree of impact on the lifespan of the battery cell is determined based on the fact that the time for which the temperature deviation exceeds the reference deviation is equal to or greater than the reference time.
The aforementioned battery test device is The battery test system according to claim 12, wherein the lifespan impact is determined based on whether the conditions for stopping the operation of the battery cell are met within the aforementioned reference time.
The aforementioned simulation kit is The battery test system according to claim 10, further comprising a plurality of temperature sensors for detecting the temperature deviation of the battery cell.
The aforementioned simulation kit is The battery test system according to claim 10, comprising a heating pad formed to maintain one side of the battery cell at a preset first critical temperature, and a cooling line formed to maintain the other side of the battery cell at a preset second critical temperature.
The aforementioned simulation kit is The battery test system according to claim 10, wherein an insulating pad for maintaining the temperature of the battery cell above a certain temperature is provided so as to surround the battery cell.
The aforementioned verification driving pattern is: The battery test system according to claim 10, including a driving pattern in which the battery cell is driven at maximum output within the drivable range of the battery cell.

Description

[Cross-reference of related applications] This application claims priority under Korean Patent Application No. 10-2023-0193112, filed on 27 December 2023, and all content disclosed in the said Korean Patent Application is incorporated herein by reference. The embodiments disclosed in this document relate to a battery testing apparatus and a battery testing method. Recently, research and development on rechargeable batteries has been very active. Here, "rechargeable battery" refers to a battery capable of recharging and discharging, encompassing all types of batteries, including conventional Ni/Cd batteries, Ni/MH batteries, and the latest lithium-ion batteries. Among rechargeable batteries, lithium-ion batteries have the advantage of significantly higher energy density compared to conventional Ni/Cd and Ni/MH batteries. Furthermore, lithium-ion batteries can be manufactured to be small and lightweight, making them suitable for use as power sources for mobile devices. Their applications are also expanding to electric vehicles, and they are attracting attention as a next-generation energy storage medium. The increasing demand for batteries necessitates the development of sophisticated battery test algorithms for verifying battery performance. Furthermore, when batteries are used in high-temperature environments, such as in high-powered vehicles, verifying battery safety is directly linked to the safety of battery users. However, conventional battery test algorithms fail to simulate actual battery usage environments, resulting in discrepancies between the measured battery lifespan and the actual impact of battery use. A block diagram is shown illustrating a typical battery system including a battery test device according to one embodiment.A block diagram showing the configuration of a battery test device according to one embodiment is shown.A schematic diagram shows the flow of a battery testing device according to one embodiment for verifying a battery.This shows charge and discharge profiles for different driving modes used in a battery test device according to one embodiment.This shows charge and discharge profiles for different driving modes used in a battery test device according to one embodiment.This shows the temperature deviation that occurs in a battery test device according to one embodiment.This shows a simulation kit included in a battery test device according to one embodiment.The discharge capacity change rate and resistance increase rate, taking temperature deviation into account, are shown using a battery test device according to one embodiment.The degree of degradation, taking temperature deviation into account, is shown by a battery test device according to one embodiment.A control flowchart for a battery testing method according to one embodiment is shown. The various embodiments disclosed in this document will be described in detail below with reference to the attached drawings. The same reference numerals are used for identical components in the drawings, and redundant descriptions of identical components will be omitted. With respect to the various embodiments disclosed in this document, any specific structural or functional descriptions are provided merely as examples for the purpose of illustrating the embodiments. The various embodiments disclosed in this document can be implemented in a variety of ways and should not be construed as being limited to the embodiments described herein. Expressions such as "first," "second," "first," or "second" used in various embodiments can modify various components regardless of order and/or importance, and do not limit those components. For example, without exceeding the scope of the embodiments disclosed herein, the first component may be named the second component, and similarly, the second component may be named in place of the first component. The terminology used in this document is used solely to describe specific embodiments and is not intended to limit the scope of other embodiments. Singular expressions may include plural expressions unless the context clearly indicates otherwise. All terms used herein, including technical and scientific terms, may have the same meaning as those generally understood by a person of ordinary skill in the art of the embodiments disclosed herein. Terms defined in commonly used dictionaries may be interpreted as having the same or similar meaning as they have in the context of the relevant art, and should not be interpreted in an ideal or overly formal sense unless explicitly defined herein. In some cases, even terms defined herein should not be interpreted in a way that excludes the embodiments disclosed herein. Figure 1 shows a block diagram illustrating the configuration of a typical battery system, including battery testing equipment according to various embodiments. Specifically, Figure 1 schematically shows a battery system 10 according to one embodiment disclosed in this document, and a higher-level contr