CN-122003748-A - Linear three-electrode secondary battery

Abstract

A linear three-electrode secondary battery according to some embodiments includes a support having a hollow tubular structure and including a plurality of holes on a surface, a reference electrode inserted into an inside of the support, and an electrode assembly wound on the support. Thus, some embodiments may stably perform three-electrode measurements even in the presence of physical movement.

Inventors

• SONG YINHAO
• AN BINGXUAN
• Lin Hanjun

Assignees

• 株式会社LG新能源

Dates

Publication Date

20260508

Application Date

20250805

Priority Date

20240827

Claims (10)

1. 1. A linear three-electrode secondary battery comprising: A support body having a hollow tubular structure and including a plurality of holes on a surface; A reference electrode inserted into the inside of the support, and An electrode assembly wound around the support body.
2. 2. The linear three-electrode secondary battery according to claim 1, wherein the reference electrode comprises a reference electrode active material layer at one side, Wherein the reference electrode active material layer is positioned inside the support, Wherein the other side of the reference electrode, opposite to the one side of the reference electrode, is located outside the support.
3. 3. The linear three electrode secondary battery of claim 2, wherein the reference electrode active material layer comprises one or more of lithium metal and lithium titanium oxide.
4. 4. The linear three-electrode secondary battery according to claim 1, wherein the electrode assembly comprises a first electrode, a first separator, and a second electrode, Wherein the first electrode, the first separator, and the second electrode are sequentially stacked based on the support, Wherein the first electrode and the second electrode have opposite electric polarities.
5. 5. The linear three-electrode secondary battery according to claim 1, further comprising a second separator covering the electrode assembly.
6. 6. The linear three-electrode secondary battery according to claim 5, wherein the second separator further covers the support.
7. 7. The linear three-electrode secondary battery according to claim 5, further comprising a package covering the second separator.
8. 8. The linear three-electrode secondary battery according to claim 1, wherein the electrode assembly is sheet-type.
9. 9. The linear three-electrode secondary battery according to claim 8, wherein the electrode assembly is spirally wound without overlapping.
10. 10. The linear three-electrode secondary battery according to claim 8, wherein the electrode assembly is spirally wound to overlap in a range of 0.1 to 0.5 times the width of the electrode assembly.

Description

Linear three-electrode secondary battery Technical Field The present disclosure relates to a linear three-electrode secondary battery. The present application claims priority from korean patent application No. 10-2024-015029 filed on day-8 and 27 of 2024, the entire disclosure of which is incorporated herein by reference (incorporated by reference). Background In order to reduce dependence on fossil fuels while reducing carbon emissions, attention is being paid to secondary batteries that can be recharged for long-term reuse. Secondary batteries are used in various fields such as vehicles, portable electronic devices, ESS (Energy Storage System), and wearable (wearable) devices and flexible (flexible) devices. Secondary batteries are generally classified into cylindrical, prismatic, or pouch types according to shape. However, secondary batteries having these shapes may not be suitable for wearable (wearable) devices and flexible (flexible) devices. Accordingly, the linear secondary battery having flexibility may be used in wearable (wearable) devices and flexible (flexible) devices. Meanwhile, in order to confirm the performance of the secondary battery, the electrode potential (electrode potential) of the secondary battery should be measured. Measurement of electrode potential requires a three-electrode system including a reference electrode (REFERENCE ELECTRODE), a working electrode (working electrode), and a counter electrode (or auxiliary electrode) (counter electrode (or auxiliary electrode)). The performance of the linear secondary battery can also be confirmed by the three-electrode system. In the case of the linear secondary battery, it is necessary to confirm performance in the presence of physical movement. Conventionally, three-electrode measurement is performed with a reference electrode placed outside the linear secondary battery, but this method has a problem in that three-electrode measurement is performed unstably when there is physical movement in the linear secondary battery. Therefore, a technique capable of realizing stable three-electrode measurement even when there is physical movement in a linear secondary battery is demanded. Disclosure of Invention [ Technical problem ] The technical problem to be solved by the technical spirit of the present disclosure is to provide a linear three-electrode secondary battery that can stably perform three-electrode measurement even when there is physical movement. Technical scheme Some embodiments of the present disclosure that can solve the above-described problems will be described below. The linear three-electrode secondary battery according to some embodiments includes: A support body having a hollow tubular structure and including a plurality of holes on a surface; A reference electrode inserted into the inside of the support, and An electrode assembly wound around the support body. In some embodiments, the reference electrode may include a reference electrode active material layer on one side, the reference electrode active material layer may be located inside the support, and the other side of the reference electrode opposite to the one side of the reference electrode may be located outside the support. In some embodiments, the reference electrode active material layer may include one or more of lithium metal and lithium titanium oxide. In some embodiments, the electrode assembly may include a first electrode, a first separator, and a second electrode, Wherein the first electrode, the first separator, and the second electrode may be sequentially stacked based on the support, Wherein the first electrode and the second electrode may have opposite electric polarities to each other. In some embodiments, the linear three-electrode secondary battery may include a second separator covering the electrode assembly. In some embodiments, the second membrane may also cover the support. In some embodiments, the linear three-electrode secondary battery may include a package covering the second separator. In some embodiments, the electrode assembly may be sheet-type. In some embodiments, the electrode assembly may be spirally wound without overlapping. In some embodiments, the electrode assembly may be spirally wound to overlap in a range of 0.1 to 0.5 times the width of the electrode assembly. [ Advantageous effects ] Some embodiments of the present disclosure can stably perform three-electrode measurement even in the presence of physical movement. The effects of the embodiments of the present disclosure are not limited to the above-described effects, and other effects not mentioned may be clearly derived and understood by those skilled in the art from the following description. In other words, unexpected effects of implementing embodiments of the present disclosure may also be derived and understood by those skilled in the art to which embodiments of the present disclosure pertain. Drawings Fig. 1 schematically illustrates a linear three-electrode seconda