WO2023058955A1 - 전극 조립체 및 이를 포함하는 전지 셀 - Google Patents
전극 조립체 및 이를 포함하는 전지 셀 Download PDFInfo
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- WO2023058955A1 WO2023058955A1 PCT/KR2022/014176 KR2022014176W WO2023058955A1 WO 2023058955 A1 WO2023058955 A1 WO 2023058955A1 KR 2022014176 W KR2022014176 W KR 2022014176W WO 2023058955 A1 WO2023058955 A1 WO 2023058955A1
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- Prior art keywords
- electrode
- electrode assembly
- separator sheet
- paragraph
- assembly
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0459—Cells or batteries with folded separator between plate-like electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/463—Separators, membranes or diaphragms characterised by their shape
- H01M50/466—U-shaped, bag-shaped or folded
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to an electrode assembly and a battery cell including the same, and more specifically, to an electrode assembly in which electrodes and separator sheets are alternately stacked in a Z-folding type, and a battery cell including the same, wherein the electrode is detached from the position While preventing this, it relates to an electrode assembly with improved stiffness of the electrode assembly even if the adhesive strength of the separator sheet itself is low, and a battery cell including the same.
- types of secondary batteries include nickel cadmium batteries, nickel hydrogen batteries, lithium ion batteries, and lithium ion polymer batteries. These secondary batteries are used not only for small products such as digital cameras, P-DVDs, MP3Ps, mobile phones, PDAs, portable game devices, power tools, and E-bikes, but also for large products that require high power, such as electric vehicles and hybrid vehicles, and surplus power generation. It is applied and used to a power storage device for storing power or renewable energy and a power storage device for backup.
- an electrode assembly having a predetermined shape is formed by applying an electrode active material slurry to a positive electrode current collector and a negative electrode current collector to prepare a positive electrode and a negative electrode, and then stacking them on both sides of a separator. Then, the electrode assembly is accommodated in the battery case, and the electrolyte is injected and then sealed.
- Electrode assemblies are classified into various types. For example, a simple stack type in which anodes, separators, and cathodes are continuously stacked by crossing anodes, separators, and cathodes without manufacturing unit cells is first manufactured using anodes, separators, and cathodes, and then these unit cells are manufactured.
- Lamination & Stack Type L&S, Lamination & Stack Type
- stack and folding in which a plurality of unit cells are spaced apart and attached to one side of a long separator sheet, and the separator sheet is repeatedly folded in the same direction from one end.
- a plurality of electrodes or unit cells are alternately attached to one side and the other side of a long separator sheet, respectively, and the separator sheet is folded from one end in a specific direction and then folded in the opposite direction.
- the problem to be solved by the present invention is an electrode assembly in which electrodes and separator sheets are alternately stacked in a Z-folding type and a battery cell including the same, wherein the adhesive strength of the separator sheet itself is improved while preventing the electrode from being separated from its original position.
- An object of the present invention is to provide an electrode assembly having improved stiffness of the electrode assembly even though it is low, and a battery cell including the same.
- An electrode assembly is an electrode assembly in which electrodes and separator sheets are alternately stacked, wherein the electrode includes a first electrode and a second electrode, and the separator sheet is formed by folding at least twice. It has a zigzag shape, the length of the second electrode is smaller than the length of the first electrode, and an adhesive member is positioned between either side of both sides of the electrode assembly and the second electrode.
- the adhesive member is located between a separator sheet in contact with the upper surface of the second electrode and a separator sheet in contact with the lower surface of the second electrode, and the adhesive member is located on both side surfaces of the second electrode surrounded by the separator sheet. It may be located between the opposite side and the outer side of the electrode assembly.
- the opposite side of both sides of the first electrode to the side covered by the separator sheet and the side of both sides of the second electrode surrounded by the separator sheet are the electrodes. It may be aligned biasedly on one side of the outer surface of the assembly.
- one side facing one end of the second electrode may be spaced apart from the second electrode.
- a side opposite to one side facing one end of the second electrode may be aligned with an outer side of the electrode assembly.
- the side covered by the separator sheet may come into contact with the separator sheet, and the side of both sides of the first electrode covered by the separator sheet may come into contact with the separator sheet.
- a side opposite to the side covered by the separator sheet may be positioned on the same vertical line as the outer side of the electrode assembly.
- Adhesion between the electrode and the separator sheet may be 0 gf/mm or more and 0.05 gf/mm or less.
- One end of the separator sheet may extend along an outer surface of the electrode assembly.
- One end of the separator sheet may cover the entire outer surface of the electrode assembly.
- a wrapping member covering an outer surface of the electrode assembly may be further included.
- the lapping member includes a first lapping member and a second lapping member, and the first lapping member has a side opposite to the side wrapped by the separator sheet among both side surfaces of the first electrode on the outer surface of the electrode assembly.
- the second wrapping member may wrap a portion of both sides of the adhesive member on the outer surface of the electrode assembly where a side opposite to one side facing one end of the second electrode is located.
- the first lapping member may extend along one of the upper and lower surfaces of the electrode assembly, and the second lapping member may extend along the other one of the upper and lower surfaces of the electrode assembly.
- the wrapping member may be formed of at least one of a hot-melt film and an adhesive tape.
- a battery cell according to another embodiment of the present invention includes the electrode assembly described above.
- the present invention is an electrode assembly in which electrodes and separator sheets are alternately stacked in a Z-folding type, and an electrode assembly positioned between the separator sheets and an adhesive member is positioned between the outer surface of the electrode assembly, and including the same
- the stiffness of the electrode assembly can be improved even if the adhesive strength of the separator sheet itself is low while preventing the electrode from being separated from the position.
- FIG. 1 is a view showing a final electrode assembly according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view of the electrode assembly taken along the A-A′ axis of FIG. 1;
- 3 and 4 are cross-sectional views of an electrode assembly according to another embodiment of the present invention.
- FIG. 5 is a cross-sectional view of an electrode assembly according to a comparative example.
- FIG. 6 is a view showing an experimental example of measuring stiffness of an electrode assembly.
- planar image it means when the target part is viewed from above, and when it is referred to as “cross-sectional image”, it means when a cross section of the target part cut vertically is viewed from the side.
- FIG. 1 is a view showing a final electrode assembly according to an embodiment of the present invention.
- 2 is a cross-sectional view of the electrode assembly taken along the A-A′ axis of FIG. 1;
- the final electrode assembly 100 may mean a structure in which a fixing tape 300 is attached to the outer surface of the electrode assembly 200 . Accordingly, in the final electrode assembly 100, stack alignment between the first electrode 210, the second electrode 220, and the separator sheet 230 included in the electrode assembly 200 can be maintained.
- the fixing tape 300 is omitted from the final electrode assembly 100 or is replaced with another member so that the first electrode 210, the second electrode 220, and the separator sheet 230 It is possible to maintain the stacking alignment between the layers.
- the final electrode assembly 100 includes an electrode lead 400 to which electrode tabs extending from the plurality of first electrodes 210 and the plurality of second electrodes 220 included in the electrode assembly 200 are joined. can do.
- the electrode leads 400 may extend to both ends of the electrode assembly 200, respectively, and the electrode leads 400 have polarities of the first electrode 210 and the second electrode 220. Depending on the lead, it can be divided into a positive lead or a negative lead.
- the position of the electrode lead 400 is not limited thereto, and unlike FIG. 1 , it may extend along one end of the electrode assembly 200 .
- the final electrode assembly 100 may include a lead film 500 positioned above and below the electrode lead 400 .
- the lead film 500 is sealed with a sealing portion (not shown) along with the outer periphery of the battery case (not shown).
- an electrode assembly 200 may be an electrode assembly in which electrodes 210 and 220 and a separator sheet 230 are alternately stacked.
- the electrodes 210 and 220 may include a first electrode 210 and a second electrode 220 .
- the first electrode 210 and the second electrode 220 may include electrode active materials having different polarities. That is, the first electrode 210 and the second electrode 220 may be electrodes having different polarities.
- the second electrode 220 may be a cathode.
- the second electrode 220 may be an anode.
- the length of the second electrode 220 may be shorter than the length of the first electrode 210 .
- the length of the first electrode 210 may be greater than the length of the second electrode 220 .
- the first electrode 210 and the second electrode 220 have different lengths along the first longitudinal direction L1, so that the first electrode 210 and the second electrode 220 There may be a difference in length between them. Accordingly, a tolerance d may be formed between the second electrode 220 and the outer surface of the electrode assembly 200 .
- the first longitudinal direction L1 may be a height direction or a length direction of the electrode assembly 200 .
- the separator sheet 230 may have a zigzag shape formed by folding at least twice. More specifically, as shown in FIG. 2 , the separator sheet 230 may be folded in a direction covering the first electrode 210 in a state in which the first electrode 210 is stacked. In addition, in a state where the second electrode 220 is stacked on the separator sheet 230 covering the first electrode 210, it may be folded in a direction covering the second electrode 220. Thereafter, in a state in which the first electrode 210 is stacked on the separator sheet 230 covering the second electrode 220 , it may be folded in a direction covering the first electrode 210 . That is, the electrode assembly 200 may be formed by repeatedly stacking the first electrode 210 or the second electrode 220 and folding the separator sheet 230 .
- the first electrode 210 and the second electrode 220 are formed on the side opposite to the side covered by the separator sheet 230 among both sides of the first electrode 210 and the second electrode 220 ) Among both sides of the membrane sheet 230, the side wrapped by the membrane sheet 230 may be aligned biasedly with one side of the outer side of the electrode assembly 200. In other words, within the zigzag structure formed by folding the separator sheet 230, one end of the first electrode 210 and one end of the second electrode 220 are biased toward one side of the electrode assembly 200. It may be arranged to hit. That is, in the electrode assembly 200 according to the present embodiment, the first electrode 210 and the second electrode 220 are not aligned with respect to the center of the electrode assembly 200, but one side of the electrode assembly 200. It may be sorted based on .
- the adhesive member positioned between the second electrode 220 and the outer surface of the electrode assembly 200 which will be described later.
- the area of 250 may be larger.
- the side wrapped by the separator sheet 230 is in contact with the separator sheet 230, and the side of both sides of the first electrode 210 that is wrapped by the separator sheet is in contact with the separator sheet 230. It may come into contact with the sheet 230 .
- the meaning that the side surface of the first electrode 210 or the second electrode 220 is in contact with the separator sheet 230 means that the separator sheet 230 is in contact with the side surface of the first electrode 210 or the second electrode 220. It may mean that it extends along or that the separator sheet 230 surrounds the side surface of the first electrode 210 or the second electrode 220 .
- a side opposite to the side covered by the separator sheet 230 may be located on the same vertical line as the outer side of the electrode assembly 200.
- the opposite side to the side covered by the separator sheet 230 may protrude toward the outer side of the electrode assembly 200 or may not be recessed.
- the adhesive member 250 is positioned between the second electrode 220 and the outer surface of the electrode assembly 200 .
- the adhesive member 250 may be located within the tolerance d between the second electrode 220 and the outer surface of the electrode assembly 200 . More specifically, the adhesive member 250 may be positioned between the separator sheet 230 contacting the upper surface of the second electrode 220 and the separator sheet 230 contacting the lower surface of the second electrode 220. In addition, the adhesive member 250 may be positioned between the opposite side of the side of the second electrode 220 covered by the separator sheet 230 and the outer side of the electrode assembly 200 .
- the adhesive member 250 is located in the space formed between the second electrode 220 and the outer surface of the electrode assembly 200, and has a structure to improve space efficiency, while the electrode 210 , 220) and the separator 230 by supplementing the adhesive strength of the electrode assembly 200 (stiffness) can be improved.
- one side facing the second electrode 220 and one end of both sides of the adhesive member 250 may be spaced apart from the second electrode 220 .
- a side adjacent to the second electrode 220 among both side surfaces of the adhesive member 250 may not come into contact with the second electrode 220 .
- the adhesive member 250 does not come into contact with the second electrode 220, so that the adhesive material included in the adhesive member 250 adheres to the first electrode 210 and the second electrode 220. It is possible to prevent obstruction of the movement path of lithium ions formed between the two layers.
- the second electrode 220 may be an anode, and the movement of lithium ions may be determined according to the position of the anode, which is generally smaller in size than the anode.
- the separation distance (s) between one end of the second electrode 220 facing each other and one side of the adhesive member 250 may be at least 0.5 mm or more, preferably 0.6 mm or more, and more preferably 1 mm or more. there is.
- the line width of the adhesive applied by the dispenser is about 0.4 to 0.6 mm.
- adhesive application may be possible without the adhesive member 250 interfering with the anode side.
- the adhesive since the adhesive may become a foreign substance, it is necessary to avoid applying too much.
- a side opposite to one side facing one end of the second electrode 220 may be aligned with the outer side of the electrode assembly 200 .
- a side opposite to one side facing one end of the second electrode 220 may not protrude or be recessed with respect to the outer surface of the electrode assembly 200.
- the separator sheet 230 positioned above the second electrode 220 and the separator sheet positioned below the second electrode 220 ( 230) can more effectively prevent folding in the process.
- the adhesive member 250 may be made of an adhesive material including one or more components selected from the group consisting of olefin, acrylate, urethane, ester, amide, vinyl acetate, and rubber-based polymer. However, it is not limited thereto, and any material capable of bonding between the electrodes 210 and 220 and the separator sheet 230 may be included in the present embodiment.
- the adhesive member 250 is uniformly applied to the tolerance d formed between the second electrode 220 and the outer surface of the electrode assembly 200 .
- the amount of adhesive applied may be excessively large. In this case, the adhesive may flow to the outside of the separator sheet 230 and contaminate other parts, and the function of generating power when the secondary battery is manufactured may not be smooth.
- the electrodes 210 and 220 are still not fixed to the separator sheet 230 and may come out of position while the cell moves. That is, it may be desirable that the interval of the area where the adhesive is applied is not excessively wide.
- the adhesive member 250 is applied in a spot application method or a line form in the tolerance d formed between the second electrode 220 and the outer surface of the electrode assembly 200 in a dot form. It may be preferable to apply it in a line application method that does.
- the diameter of a dot of a spot application method or the width of a line of a line application method may be 100um or more and 800um or less.
- the diameter of the dot of the spot application method or the width of the line of the line application method is not limited to the above range, and may be adjusted to have a diameter or width of an appropriate size as needed.
- spot application or line application of the adhesive member 250 may be performed using a pneumatic method or a piezoelectric method. However, it is not limited thereto, and any method capable of applying an adhesive to a localized area may be included in the present embodiment.
- the electrode assembly 200 of the present embodiment is the second electrode 220 and the electrode assembly ( Since the adhesive member 250 is formed between the outer surfaces of the electrodes 200, the electrodes 210 and 220 can be prevented from being moved out of position while maintaining high stiffness of the electrode assembly.
- the separator sheet 230 may be an inexpensive separator having relatively low adhesive strength.
- the separator sheet 230 may be a ceramic coated separator (CCS) separator.
- CCS ceramic coated separator
- the separator sheet 230 is not limited thereto, and any separator having adhesive strength similar to that of the CCS separator may be included in the present embodiment.
- the adhesive strength between the electrodes 210 and 220 and the separator sheet 230 may be 0 gf/mm or more and 0.05 gf/mm or less. More specifically, the adhesive force between the electrodes 210 and 220 and the separator sheet 230 may be 0 gf/mm or more and 0.045 gf/mm or less. For example, the adhesive force between the electrodes 210 and 220 and the separator sheet 230 may be 0 gf/mm or more and 0.04 gf/mm or less.
- the adhesive member between the second electrode 220 and the outer surface of the electrode assembly 200 ( 250) is formed to supplement the adhesive strength between the electrodes 210 and 220 and the separator sheet 230, prevent the electrodes 210 and 220 from leaving their positions, and increase the stiffness of the electrode assembly. can be kept high.
- the present embodiment can use the separator sheet 230 having a relatively low adhesive strength, thereby reducing cost and improving economic efficiency.
- 3 and 4 are cross-sectional views of an electrode assembly according to another embodiment of the present invention.
- electrode assemblies 201 and 202 may be described in almost the same way as the electrode assembly 200 described above, and hereinafter, the electrode assembly 200 I would like to explain only the parts that are different from .
- one end of the separator sheet 230 may extend along the outer surface of the electrode assembly 201 . More specifically, one end of the separator sheet 230 may cover the entire outer surface of the electrode assembly 201 . That is, one end of the separator sheet 230 may cover both side surfaces and upper and lower surfaces of the electrode assembly 201 .
- the end of the separator sheet 230 surrounding the outer surface of the electrode assembly 201 may be the end of the separator sheet 230 closest to the bottom surface.
- the end of the separator sheet 230 surrounding the outer surface of the electrode assembly 201 may be the end of the separator sheet 230 adjacent to the upper end of the electrode assembly 201 .
- the separator sheet 230 covers the outer surface of the electrode assembly 201 to prevent the first electrode 210 from protruding to the outside.
- the separator sheet 230 surrounding the outer surface of the electrode assembly 201 can further improve the stiffness of the electrode assembly 201 and effectively prevent the separator sheet 230 from folding.
- cost reduction and economic efficiency can be improved in that a separate member is not required.
- the electrode assembly 202 may further include a wrapping member 270 surrounding an outer surface of the electrode assembly 202 .
- the lapping member 270 includes a first lapping member and a second lapping member.
- the first wrapping member may cover a portion of both sides of the first electrode 210 on the outer surface of the electrode assembly 202 where the side opposite to the side wrapped by the separator sheet 230 is located.
- the second lapping member may wrap a portion of both side surfaces of the adhesive member 250 on the outer surface of the electrode assembly 202 where the side opposite to one side facing one end of the second electrode 220 is located. That is, the first wrapping member may wrap one side of the electrode assembly 202 and the second wrapping member may wrap the other side of the electrode assembly 202 .
- first lapping member may extend along one of the upper and lower surfaces of the electrode assembly 202
- second lapping member may extend along the other of the upper and lower surfaces of the electrode assembly 202.
- one of the lapping members 270 may extend along one side surface of the electrode assembly 202 and extend to an upper surface of the electrode assembly 202
- the other lapping member 270 may extend along the other side surface of the electrode assembly 202 and extend to the lower surface of the electrode assembly 202 .
- first lapping member and the second lapping member may be integrated with each other.
- the wrapping member 270 may be a hot-melt film containing at least one component selected from the group consisting of olefins, acrylates, urethanes, esters, amides, vinyl acetates, and rubber-based polymers.
- the wrapping 270 member may be an adhesive tape.
- any polymer material having elasticity and adhesive strength sufficient to cover the outer surface of the electrode assembly 202 may be included in the present embodiment.
- the wrapping member 270 covers the outer surface of the electrode assembly 201 to prevent the first electrode 210 from protruding to the outside.
- the wrapping member 270 covering the outer surface of the electrode assembly 201 can further improve the stiffness of the electrode assembly 201 and effectively prevent the separator sheet 230 from being folded.
- FIG. 5 is a cross-sectional view of an electrode assembly according to a comparative example.
- first electrodes 21 and second electrodes 22 may be alternately stacked between separators 23 .
- the end of the separator 23 may have a shape protruding outward with respect to the outer surface of the electrode assembly 20. Accordingly, there is a problem in that an end of the separator 23 may be folded in a process, and a short circuit occurs when the separator 23 shrinks at a high temperature.
- a separate adhesive member is not formed between the separator 23 and the electrodes 21 and 22, so that the electrodes 210 and 220 are not separated from their positions in the electrode assembly 20.
- a separator 23 having high adhesion should be used.
- the separation membrane 23 having high adhesive strength since a relatively high cost is required as described above, there is a problem in that economic efficiency decreases as the cost increases.
- the adhesive member 250 is provided between the second electrode 220 and the outer surface of the electrode assembly 200. Since it is formed, it is possible to use the separator sheet 230 having a relatively low adhesive strength, but there is an advantage in that the electrodes 210 and 220 are prevented from being moved out of position and the stiffness of the electrode assembly can be maintained high. .
- a battery cell according to another embodiment of the present invention includes the electrode assembly described above.
- the battery cell may include a battery case (not shown) accommodating the above-described electrode assemblies 200, 201, and 202 together with an electrolyte solution.
- the electrode assemblies 200, 201, and 202 may be made of the above-described final electrode assembly 100 and accommodated in the battery case (not shown).
- the battery case may be a laminate sheet including a resin layer and a metal layer. More specifically, the battery case (not shown) is made of a laminate sheet, and may be composed of an outer resin layer constituting the outermost shell, a barrier metal layer preventing penetration of materials, and an inner resin layer for sealing.
- An electrode assembly having a zigzag shape was manufactured by alternately stacking between separator sheets in the order of an anode and a cathode, and folding the separator sheet at least twice.
- the separator sheet is a CCS (Ceramic Coated Seperator) separator.
- the size of the electrode assembly is 510 mm*97 mm.
- the length of the positive electrode is smaller than the length of the negative electrode
- the electrode assembly is the same as in Comparative Example 1 except that an adhesive is applied between the positive electrode and the outer surface of the electrode assembly to form an adhesive member. was manufactured.
- FIG. 6 is a view showing an experimental example of measuring stiffness of an electrode assembly. As shown in FIG. 6, after the center of the electrode assembly 200 was placed on a bar having a thickness of 50 mm, the degree of bending (L) of the electrode assembly 200 was measured based on the top of the bar. The results are shown in Table 1.
- both ends of the electrode assembly 200 are bent relatively much with respect to the center of the electrode assembly 200.
- both ends of the electrode assembly 200 are bent relatively little with respect to the center of the electrode assembly 200.
- the stiffness of the electrode assembly is improved through the adhesive member having the adhesive applied between the positive electrode and the outer surface of the electrode assembly. You can check that it has been done.
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Abstract
Description
| 비교예 | 실시예 | |
| 전극 조립체의 절곡 정도(L) | 100cm | 50cm |
Claims (15)
- 전극 및 분리막 시트가 교대로 적층되어 있는 전극 조립체로서,상기 전극은 제1 전극 및 제2 전극을 포함하고,상기 분리막 시트는 적어도 2회 폴딩됨으로써 형성된 지그 재그 형태를 가지고,상기 제2 전극의 길이는 상기 제1 전극의 길이보다 작고,상기 전극 조립체의 양 측면 중 어느 한 측면과 상기 제2 전극 사이에 접착 부재가 위치하는 전극 조립체.
- 제1항에서,상기 접착 부재는 상기 제2 전극의 상면과 접하는 분리막 시트와 상기 제2 전극의 하면과 접하는 분리막 시트 사이에 위치하고,상기 접착 부재는 상기 제2 전극의 양 측면 중 상기 분리막 시트에 의해 감싸지는 측면의 반대 측면과 상기 전극 조립체의 외측면 사이에 위치하는 전극 조립체.
- 제2항에서,상기 제1 전극 및 상기 제2 전극은, 상기 제1 전극의 양 측면 중 상기 분리막 시트에 의해 감싸지는 측면의 반대 측면과 상기 제2 전극의 양 측면 중 상기 분리막 시트에 의해 감싸지는 측면이 상기 전극 조립체의 외측면 중 일측면에 치우치게 정렬되어 있는 전극 조립체.
- 제3항에서,상기 접착 부재의 양 측면 중 상기 제2 전극의 일 단부와 마주보는 일 측면은 상기 제2 전극과 이격되어 있는 전극 조립체.
- 제4항에서,상기 접착 부재의 양 측면 중 상기 제2 전극의 일 단부와 마주보는 일 측면의 반대 측면은 상기 전극 조립체의 외측면과 나란하게 배열되는 전극 조립체.
- 제3항에서,상기 제2 전극의 양 측면 중 상기 분리막 시트에 의해 감싸지는 측면은 상기 분리막 시트와 접하고,상기 제1 전극의 양 측면 중 상기 분리막 시트에 의해 감싸지는 측면은 상기 분리막 시트와 접하는 전극 조립체.
- 제6항에서,상기 제1 전극의 양 측면 중 상기 분리막 시트에 의해 감싸지는 측면의 반대 측면은 상기 전극 조립체의 외측면과 동일한 수직선 상에 위치하는 전극 조립체.
- 제1항에서,상기 전극과 상기 분리막 시트 사이의 접착력은 0gf/mm 이상 내지 0.05gf/mm 이하인 전극 조립체.
- 제1항에서,상기 분리막 시트의 일 단부는 상기 전극 조립체의 외면을 따라 연장되어 있는 전극 조립체.
- 제9항에서,상기 분리막 시트의 일 단부는 상기 전극 조립체의 외면 전체를 감싸는 전극 조립체.
- 제1항에서,상기 전극 조립체의 외면을 감싸는 랩핑(Wrapping) 부재를 더 포함하는 전극 조립체.
- 제11항에서,상기 랩핑 부재는 제1 랩핑 부재 및 제2 랩핑 부재를 포함하고,상기 제1 랩핑 부재는, 상기 전극 조립체의 외면에서 상기 제1 전극의 양 측면 중 상기 분리막 시트에 의해 감싸지는 측면의 반대 측면이 위치하는 부분을 감싸고,상기 제2 랩핑 부재는, 상기 전극 조립체의 외면에서 상기 접착 부재의 양 측면 중 상기 제2 전극의 일 단부와 마주보는 일 측면의 반대 측면이 위치하는 부분을 감싸는 전극 조립체.
- 제12항에서,상기 제1 랩핑 부재는 상기 전극 조립체의 상면 및 하면 중 하나를 따라 연장되어 있고,상기 제2 랩핑 부재는 상기 전극 조립체의 상면 및 하면 중 나머지 하나를 따라 연장되어 있는 전극 조립체.
- 제11항에서,상기 랩핑 부재는 핫멜트(Hot-melt) 필름 및 접착 테이프 중 적어도 하나로 이루어지는 전극 조립체.
- 제1항의 전극 조립체를 포함하는 전지 셀.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2023553622A JP7686918B2 (ja) | 2021-10-07 | 2022-09-22 | 電極アセンブリーおよびこれを含む電池セル |
| EP22878776.8A EP4300647A4 (en) | 2021-10-07 | 2022-09-22 | ELECTRODE ARRANGEMENT AND BATTERY CELL THEREFORE |
| US18/567,278 US20240283003A1 (en) | 2021-10-07 | 2022-09-22 | Electrode Assembly and Battery Cell Including the Same |
| CN202280026282.5A CN117157789A (zh) | 2021-10-07 | 2022-09-22 | 电极组件和包括该电极组件的电池电芯 |
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| KR20210133372 | 2021-10-07 | ||
| KR10-2021-0133372 | 2021-10-07 | ||
| KR1020220117985A KR102622632B1 (ko) | 2021-10-07 | 2022-09-19 | 전극 조립체 및 이를 포함하는 전지 셀 |
| KR10-2022-0117985 | 2022-09-19 |
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| WO2023058955A1 true WO2023058955A1 (ko) | 2023-04-13 |
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| US (1) | US20240283003A1 (ko) |
| EP (1) | EP4300647A4 (ko) |
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| WO (1) | WO2023058955A1 (ko) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4462533A1 (en) * | 2023-05-12 | 2024-11-13 | Toyota Jidosha Kabushiki Kaisha | Electrode assembly |
| EP4462534A1 (en) * | 2023-05-12 | 2024-11-13 | Toyota Jidosha Kabushiki Kaisha | Electrode assembly and power storage cell |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4726832A1 (en) * | 2024-10-14 | 2026-04-15 | Samsung Sdi Co., Ltd. | Electrode assembly, rechargeable battery, and battery pack |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015215988A (ja) * | 2014-05-09 | 2015-12-03 | 川崎重工業株式会社 | 角形電池 |
| JP2016105360A (ja) * | 2014-12-01 | 2016-06-09 | 株式会社Gsユアサ | 蓄電素子 |
| KR20190065138A (ko) * | 2017-12-01 | 2019-06-11 | 주식회사 엘지화학 | 전극 및 전극조립체 |
| KR102164003B1 (ko) * | 2018-11-19 | 2020-10-12 | 삼성에스디아이 주식회사 | 전극 조립체 및 그의 제조 방법 |
| KR102205425B1 (ko) * | 2019-08-13 | 2021-01-20 | 주식회사 루트제이드 | 이차전지용 전극 조립체, 이의 제조 방법 및 이를 포함하는 리튬이차전지 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5408686B2 (ja) * | 2008-03-11 | 2014-02-05 | Necエナジーデバイス株式会社 | 積層型電池 |
| US20200243895A1 (en) * | 2017-09-29 | 2020-07-30 | Envision Aesc Energy Devices Ltd. | Secondary battery |
| KR102838321B1 (ko) * | 2020-03-18 | 2025-07-24 | 주식회사 엘지에너지솔루션 | 전극 조립체 및 그의 제조 방법 |
-
2022
- 2022-09-22 US US18/567,278 patent/US20240283003A1/en active Pending
- 2022-09-22 JP JP2023553622A patent/JP7686918B2/ja active Active
- 2022-09-22 EP EP22878776.8A patent/EP4300647A4/en active Pending
- 2022-09-22 WO PCT/KR2022/014176 patent/WO2023058955A1/ko not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015215988A (ja) * | 2014-05-09 | 2015-12-03 | 川崎重工業株式会社 | 角形電池 |
| JP2016105360A (ja) * | 2014-12-01 | 2016-06-09 | 株式会社Gsユアサ | 蓄電素子 |
| KR20190065138A (ko) * | 2017-12-01 | 2019-06-11 | 주식회사 엘지화학 | 전극 및 전극조립체 |
| KR102164003B1 (ko) * | 2018-11-19 | 2020-10-12 | 삼성에스디아이 주식회사 | 전극 조립체 및 그의 제조 방법 |
| KR102205425B1 (ko) * | 2019-08-13 | 2021-01-20 | 주식회사 루트제이드 | 이차전지용 전극 조립체, 이의 제조 방법 및 이를 포함하는 리튬이차전지 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP4300647A4 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4462533A1 (en) * | 2023-05-12 | 2024-11-13 | Toyota Jidosha Kabushiki Kaisha | Electrode assembly |
| EP4462534A1 (en) * | 2023-05-12 | 2024-11-13 | Toyota Jidosha Kabushiki Kaisha | Electrode assembly and power storage cell |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4300647A4 (en) | 2025-06-11 |
| EP4300647A1 (en) | 2024-01-03 |
| JP7686918B2 (ja) | 2025-06-03 |
| US20240283003A1 (en) | 2024-08-22 |
| JP2024509202A (ja) | 2024-02-29 |
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