KR-102964589-B1 - APPARATUS AND METHOD FOR GENERATING ELECTRODE PROFILE

KR102964589B1KR 102964589 B1KR102964589 B1KR 102964589B1KR-102964589-B1

Abstract

An electrode profile generating device according to one embodiment of the present invention comprises: a profile acquiring unit configured to acquire a battery differential profile in which a battery profile representing a correspondence relationship between the voltage and capacity of a battery is differentiated; and a control unit configured to determine a plurality of active material differential profiles corresponding to a plurality of active materials included in a first electrode of the battery, determine a feature point in each of the plurality of active material differential profiles, adjust each of the plurality of active material differential profiles so that the determined feature point corresponds to the battery differential profile, and generate an electrode profile corresponding to the first electrode based on the adjusted plurality of active material differential profiles.

Inventors

제갈선영
고동욱
김승현

Assignees

주식회사 엘지에너지솔루션

Dates

Publication Date: 20260512
Application Date: 20240926

Claims (12)

A profile acquisition unit configured to acquire a differentiated battery profile, wherein the battery profile representing the correspondence relationship between the voltage and capacity of the battery is differentiated; and An electrode profile generating device comprising a control unit configured to determine a plurality of active material differential profiles corresponding to a plurality of active materials included in a first electrode of the battery, determine a feature point in each of the plurality of active material differential profiles, adjust each of the plurality of active material differential profiles so that the determined feature point corresponds to the battery differential profile, and generate an electrode profile corresponding to the first electrode based on the adjusted plurality of active material differential profiles.
In paragraph 1, The above control unit is, An electrode profile generating device configured to determine a target active material differential profile from a plurality of active material differential profiles, determine a feature point in the determined target active material differential profile, determine a reference point corresponding to the feature point in the battery differential profile, and adjust the target active material differential profile so that the feature point corresponds to the reference point.
In paragraph 2, The above control unit is, An electrode profile generating device configured to adjust the target active material differential profile so that the state value of the above feature point corresponds to the state value of the above reference point.
In paragraph 2, The above control unit is, An electrode profile generating device configured to determine the active material differential profile having the characteristic point among the plurality of active material differential profiles as the target active material differential profile.
In paragraph 1, The above control unit is, An electrode profile generating device configured to determine an active material profile from each of the above-mentioned adjusted multiple active material differential profiles, and to generate an electrode profile from the multiple active material profiles based on the mixing ratio of the multiple active materials.
In paragraph 5, The above control unit is, An electrode profile generating device configured to generate the electrode profile by linearly combining the plurality of active material profiles according to the above mixing ratio.
In paragraph 1, The above control unit is, An electrode profile generating device configured to determine the characteristic points in each of the plurality of active material differential profiles according to a preset standard for each of the plurality of active materials.
In paragraph 1, The above control unit is, An electrode profile generating device configured to determine an active material differential profile corresponding to the degradation state of the battery among a plurality of active material differential profiles preset to correspond to each of the plurality of active materials.
A battery pack comprising an electrode profile generating device according to any one of claims 1 to 8.
An automobile comprising an electrode profile generating device according to any one of claims 1 to 8.
A server comprising an electrode profile generating device according to any one of claims 1 to 8.
A profile acquisition step for acquiring a differentiated battery profile that represents the correspondence relationship between the voltage and capacity of the battery; A step for determining an active material differential profile that determines a plurality of active material differential profiles corresponding to a plurality of active materials included in the first electrode of the battery; A feature point determination step for determining a feature point in each of the above plurality of active material differential profiles; An active material differential profile adjustment step for adjusting each of the plurality of active material differential profiles so that the above-determined feature point corresponds to the battery differential profile; and A method for generating an electrode profile comprising an electrode profile generation step of generating an electrode profile corresponding to the first electrode based on a plurality of adjusted active material differential profiles.

Description

Apparatus and Method for Generating Electrode Profile The present invention relates to an apparatus and method for generating an electrode profile, and more specifically, to an apparatus and method for generating an electrode profile for generating a positive electrode profile and/or a negative electrode profile of a battery. Recently, as the demand for portable electronic products such as laptops, video cameras, and mobile phones has increased rapidly, and the development of electric vehicles, energy storage batteries, robots, and satellites has accelerated, research on high-performance batteries capable of repeated charging and discharging is actively underway. Currently commercialized batteries include nickel-cadmium, nickel-hydrogen, nickel-zinc, and lithium batteries. Among these, lithium batteries are gaining attention for their advantages, such as the ability to freely charge and discharge with almost no memory effect compared to nickel-based batteries, a very low self-discharge rate, and high energy density. While extensive research is being conducted on these batteries in terms of increasing capacity and density, improving lifespan and safety is also crucial. To enhance battery safety, technology capable of accurately diagnosing the battery's current state is required. In particular, the most accurate method for diagnosing the battery's condition is to analyze the positive electrode profile (hereinafter referred to as the positive electrode profile) and/or the negative electrode profile (hereinafter referred to as the negative electrode profile), which indicate the battery's state. However, since batteries are assembled using methods such as high-temperature bonding, welding, or adhesive application, these joints can be damaged during the disassembly process. Furthermore, during the reassembly process following disassembly, deformation of the internal structure, seal failure, or damage to the joints can occur, leading to a significant degradation in battery performance. Moreover, because microscopic damage may occur in the reassembled battery, the risk of fire or explosion can also increase significantly. As such, disassembling and reassembling a battery is practically impossible. In other words, considering the difficulty of disassembling batteries, it is practically impossible to directly obtain the battery's electrode profile (positive and/or negative profile) through actual measurements. Therefore, a technology is required to more accurately estimate the battery's electrode profile by taking into account the battery type, composition, and degradation state. The following drawings attached to this specification serve to further enhance understanding of the technical concept of the invention in conjunction with the detailed description of the invention set forth below; therefore, the invention should not be interpreted as being limited only to the matters described in such drawings. FIG. 1 is a schematic diagram illustrating an electrode profile generating device according to one embodiment of the present invention. FIG. 2 is a schematic diagram illustrating a battery differential profile according to one embodiment of the present invention. FIG. 3 is a schematic diagram illustrating the fine profile of an active material according to one embodiment of the present invention. FIG. 4 is a schematic diagram illustrating a battery differential profile, an active material differential profile, and an adjusted active material differential profile according to one embodiment of the present invention. FIG. 5 is a schematic diagram illustrating an electrode profile according to one embodiment of the present invention. FIG. 6 is a schematic diagram illustrating a battery differential profile and an electrode differential profile according to an embodiment of the present invention. Figure 7 is a schematic diagram illustrating an example and a comparative example of a battery differential profile. FIG. 8 is a schematic diagram illustrating a battery pack according to another embodiment of the present invention. FIG. 9 is a schematic drawing illustrating an automobile according to another embodiment of the present invention. FIG. 10 is a schematic diagram illustrating a method for generating an electrode profile according to another embodiment of the present invention. Terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted in a meaning and concept consistent with the technical spirit of the invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention. Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention; thus, it should be understood tha