WO2023047925A1 - 蓄電デバイス用の集電板、蓄電デバイス、および蓄電デバイスの製造方法 - Google Patents

蓄電デバイス用の集電板、蓄電デバイス、および蓄電デバイスの製造方法 Download PDF

Info

Publication number
WO2023047925A1
WO2023047925A1 PCT/JP2022/033202 JP2022033202W WO2023047925A1 WO 2023047925 A1 WO2023047925 A1 WO 2023047925A1 JP 2022033202 W JP2022033202 W JP 2022033202W WO 2023047925 A1 WO2023047925 A1 WO 2023047925A1
Authority
WO
WIPO (PCT)
Prior art keywords
current collector
electrode
storage device
collector plate
electricity storage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/033202
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
利崇 小林
宏樹 林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Priority to JP2023549451A priority Critical patent/JPWO2023047925A1/ja
Priority to CN202280060024.9A priority patent/CN117916835A/zh
Priority to US18/692,719 priority patent/US20240380078A1/en
Publication of WO2023047925A1 publication Critical patent/WO2023047925A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups B23K1/00 - B23K28/00
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups B23K1/00 - B23K28/00 relating to soldering or welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22—Electrodes
    • H01G11/26—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features
    • H01G11/28—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features arranged or disposed on a current collector; Layers or phases between electrodes and current collectors, e.g. adhesives
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/66—Current collectors
    • H01G11/70—Current collectors characterised by their structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/74—Terminals, e.g. extensions of current collectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
    • 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
    • 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
    • H01M10/0431—Cells with wound or folded electrodes
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/179—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for cells having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/534—Electrode connections inside a battery casing characterised by the material of the leads or tabs
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
    • 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 disclosure relates to a current collector plate for an electricity storage device, an electricity storage device, and a method for manufacturing an electricity storage device.
  • an electricity storage device that includes a case, a columnar electricity storage element housed in the case, and a current collector plate welded to an end surface of the electricity storage element (for example, Patent Document 1).
  • the current collector plate of the power storage device of Patent Document 1 includes a plurality of first welds arranged along the radial direction and welded to the end face of the power storage element, and a central region thereof, which is welded to the inner bottom surface of the case. and a second weld.
  • first welds arranged along the radial direction and welded to the end face of the power storage element, and a central region thereof, which is welded to the inner bottom surface of the case. and a second weld.
  • the second welded portion when the second welded portion is welded, there is a risk that the power storage element will be adversely affected by the distortion that occurs in the current collector plate and the heat that occurs during welding. Specifically, if the current collector plate is distorted, the distortion may be transmitted to the first welded portion, degrading the connection between the current collector plate and the storage element. Further, when heat is generated at the second welded portion, the heat may be transferred to the electricity storage element via the first welded portion, deteriorating the characteristics of the electricity storage element. Under such circumstances, one of the purposes of the present disclosure is to suppress quality deterioration of the power storage device.
  • the current collector plate is a current collector plate for an electricity storage device that is welded to an end surface of a columnar electricity storage element included in the electricity storage device, and includes a central region, an outer peripheral region, and a bridge connecting the central region and the outer peripheral region.
  • the outer peripheral region has a plurality of first welds arranged along the radial direction of the end face and welded to the end face; and the central region has a different conductivity from the electricity storage element. and a plurality of slit-like first through holes are provided between each of the first welds and the second welds so as to surround the central region. ing.
  • the electricity storage device includes a cylindrical case with a bottom that is the conductive member, an electricity storage element housed in the case, and the current collector plate for the electricity storage device housed in the case.
  • the electric storage element includes a long sheet-like first current collector, a first electrode having a first active material layer supported on the first current collector, a long sheet-like second current collector, and a second electrode having a second active material layer supported on the second current collector; and a separator interposed between the first electrode and the second electrode;
  • the second electrode and the separator constitute a columnar wound body, the first current collector is exposed on the end face of the power storage element on the bottom side of the case, and the first weld is , and is welded to the first current collector exposed at the end surface, and the second weld portion is welded to the inner bottom surface of the case.
  • the electricity storage device includes a case having a first opening, an electricity storage element housed in the case, a third through hole, a sealing member that seals the first opening, and a sealing member that seals the first opening.
  • a rivet that is the electrically conductive member to be passed through;
  • a first electrode having a first active material layer supported on a first current collector, a long sheet-like second current collector, and a second active material layer supported on the second current collector a second electrode and a separator interposed between the first electrode and the second electrode, wherein the first electrode, the second electrode, and the separator constitute a columnar wound body
  • the second current collector is exposed on the end face of the power storage element on the first opening side, and the first welded portion is welded to the second current collector exposed on the end face. , the second weld is welded with the rivet.
  • the manufacturing method includes a step of preparing a bottomed cylindrical case, a long sheet-like first current collector, and a first electrode having a first active material layer supported on the first current collector. , a second electrode having a long sheet-like second current collector and a second active material layer supported on the second current collector, and interposed between the first electrode and the second electrode and a separator, wherein the first electrode, the second electrode, and the separator constitute a columnar winding body, and the first current collector is exposed on one end surface of the columnar electricity storage device.
  • the manufacturing method includes a long sheet-like first current collector, a first electrode having a first active material layer supported on the first current collector, a long sheet-like second current collector, and a second electrode having a second active material layer supported on the second current collector; and a separator interposed between the first electrode and the second electrode, wherein the first electrode, the The second electrode and the separator constitute a columnar wound body, which is accommodated in a case having a first opening, and the second current collector is exposed on the other end face on the first opening side.
  • a step of preparing a columnar electricity storage element that is in contact with the other end face a step of preparing a current collector plate for the electricity storage device to be welded to the other end surface; preparing a sealing member; preparing a rivet to be inserted into the third through-hole; and welding the first weld portion of the current collector plate to which the rivet is welded to the second current collector exposed on the other end surface of the power storage element housed in the case.
  • FIG. 1 is an exploded perspective view showing an electricity storage device of Embodiment 1.
  • FIG. 1 is a vertical cross-sectional view of an electricity storage device of Embodiment 1.
  • FIG. 4 is a plan view of the current collector plate of Embodiment 1.
  • FIG. 8 is a plan view of a current collector plate of Embodiment 2.
  • Embodiments of a collector plate for an electricity storage device, an electricity storage device, and a method for manufacturing an electricity storage device according to the present disclosure will be described below with examples. However, the disclosure is not limited to the examples described below. In the following description, specific numerical values and materials may be exemplified, but other numerical values and materials may be applied as long as the effects of the present disclosure can be obtained.
  • a current collector plate for an electricity storage device (hereinafter also simply referred to as a current collector plate) is welded to an end surface of a columnar electricity storage element included in the electricity storage device.
  • the current collector plate includes a central region, a peripheral region, and a bridge portion connecting the central region and the peripheral region.
  • the collector plate may be disc-shaped or may have other shapes.
  • the outer peripheral region has a plurality of first welds that are welded to the end face of the power storage element.
  • the plurality of first welds are arranged along the radial direction of the end surface of the power storage element.
  • the plurality of first welds may be arranged at regular intervals or at irregular intervals in the circumferential direction of the current collector plate.
  • Each first weld may extend along the radial direction of the current collector plate.
  • Each first weld may extend to the outermost periphery of the outer peripheral region. For example, three or four first welds may be provided, but the number is not limited to this.
  • the central region has a second weld that is welded with a conductive member different from the storage element.
  • the center of the second weld may or may not coincide with the center of the central region.
  • At least one second weld may be provided.
  • the conductive member may be, for example, a case or a rivet included in the power storage device.
  • a plurality of slit-like first through-holes are provided between each of the first welded portions and the second welded portions so as to surround the central region.
  • the bridge portion may be arranged between two circumferentially adjacent first through holes.
  • One first through-hole may be provided for one first welding portion.
  • Such a plurality of first through-holes structurally and thermally separates each of the first welds and the second welds from each other except for the connecting path through the bridge. Therefore, when welding the second welded portion (for example, ultrasonic welding or laser welding), distortion and heat generated in the second welded portion are transferred to the first welded portion, that is, the joint portion between the current collector plate and the storage element. hard to convey.
  • the first welded portion is less likely to be distorted, deterioration of the connection between the current collector plate and the power storage element can be suppressed.
  • heat is less likely to be conducted to the first welded portion, heat input to the electricity storage element is suppressed, and deterioration of the characteristics of the electricity storage element can be suppressed.
  • the thinner the current collector plate the more easily the current collector plate is distorted, and the more easily the heat transferred from the second welded portion to the first welded portion concentrates locally. Therefore, the above configuration is particularly effective when the current collector plate is made of a thin plate having a thickness of 500 ⁇ m or less.
  • the manufacturing process of the electricity storage device includes a process of injecting an electrolytic solution, a plurality of first through holes are present in the immediate vicinity of the central region of the current collector plate. Therefore, it becomes possible to efficiently inject the electrolytic solution through each first through-hole, and the manufacturing process of the electric storage device can be stabilized.
  • the first weld may be convex toward the power storage element.
  • the cross-sectional shape of the first welded portion along the circumferential direction of the current collector plate may be, for example, trapezoidal or arcuate, but is not limited thereto.
  • the convex first weld may be formed by press forming. In this case, since the first through-hole exists between the first welded portion and the second welded portion, when the first welded portion is press-formed, the second welded portion is less likely to be distorted and its flatness is maintained high. be.
  • the high flatness of the second weld can stabilize the welding process, especially when the conductive member and the current collector plate are welded by ultrasonic welding.
  • the current collector plate may be made of a material containing copper.
  • a minimum cross-sectional area of a bridge portion between adjacent first through holes may be 0.044 mm 2 or more.
  • a copper-containing material may be, for example, copper or a copper alloy.
  • the minimum cross-sectional area of the bridge portion means the minimum cross-sectional area among the cross-sectional areas of the bridge portion along the circumferential direction of the current collector plate. If the minimum cross-sectional area of the bridge portion is 0.044 mm 2 or more, it is possible to prevent the bridge portion from breaking due to the tensile stress applied to the bridge portion, for example, when the electricity storage device vibrates.
  • the current collector plate may be made of a material containing aluminum.
  • a minimum cross-sectional area of the bridge portion between adjacent first through holes may be 0.117 mm 2 or more.
  • a material containing aluminum may be, for example, aluminum or an aluminum alloy.
  • A/B ⁇ 0.8 may be satisfied, where A [mm] is the width of the bridge portion and B [mm] is the thickness of the current collector plate.
  • the width of the bridge portion refers to the dimension of the bridge portion along the circumferential direction of the current collector plate.
  • the first through-hole may have a curved shape along the circumferential direction of the current collector plate.
  • the shape of the current collector plate curved along the circumferential direction may be, for example, an arc shape extending along the circumferential direction, but is not limited to this.
  • the area of the central region, that is, the area of the second welded portion can be widened, and the conductive member and the current collector plate can be easily welded. becomes.
  • the dimension of the first through hole may be longer than the dimension of the first welded portion in the circumferential direction of the current collector plate. In this case, in the circumferential direction of the current collector plate, both end portions of the first through hole protrude outward beyond the first welded portion. The presence of this protrusion enhances the structural and thermal isolation between the first weld and the second weld. Therefore, each of the above-mentioned effects by the separation can be exhibited more strongly.
  • the first through hole may have a first portion extending in the circumferential direction of the current collector plate and a second portion extending along the radial direction of the current collector plate from both ends of the first portion.
  • the dimension in the radial direction of the current collector plate of the region formed between the adjacent second portions, that is, the bridge portion is increased.
  • the structural and thermal isolation between the first weld and the second weld is further enhanced. Therefore, each of the above-mentioned effects by the separation can be exhibited more strongly.
  • the current collector plate may further include second through holes that are provided between the plurality of first welds and that are different from the first through holes.
  • the manufacturing process of the electricity storage device includes the process of injecting the electrolytic solution, and the current collector plate has not only the first through-holes but also the second through-holes. Therefore, it becomes possible to efficiently inject the electrolytic solution through the first through-hole and the second through-hole, and the manufacturing process of the electric storage device can be stabilized.
  • An electricity storage device (hereinafter also referred to as electricity storage device A) includes a cylindrical case with a bottom, an electricity storage element housed in the case, and the above-described current collector plate housed in the case. Prepare.
  • the case is made of a conductive material and constitutes a conductive member that is welded with the second weld.
  • the case may have a cylindrical side wall and a bottom closing one end of the side wall.
  • the sidewall may be, for example, cylindrical or rectangular.
  • the bottom has a shape corresponding to the shape of the sidewalls.
  • the power storage element has a first electrode, a second electrode, and a separator interposed between the first electrode and the second electrode.
  • the first electrode, the second electrode, and the separator constitute a columnar wound body. That is, the first electrode and the second electrode are wound with the separator interposed therebetween.
  • the first electrode has a long sheet-like first current collector and a first active material layer carried on the first current collector.
  • the second electrode has a long sheet-like second current collector and a second active material layer carried on the second current collector.
  • the first current collector is exposed on the end face on the bottom side of the case of the electricity storage element.
  • the exposed portion may not be provided with the first active material layer.
  • the first welded portion is welded to the first current collector exposed on the end face.
  • the second welded portion is welded to the inner bottom surface of the case.
  • electrical connection between the power storage element and the case is realized via the current collector plate.
  • the case functions as an external terminal of the electricity storage device A.
  • the first welded portion and the first current collector may be welded by, for example, laser welding.
  • the second weld and the case may be welded by, for example, ultrasonic welding or laser welding.
  • An electricity storage device (hereinafter also referred to as electricity storage device B) includes a case having a first opening, an electricity storage element housed in the case, and a third through hole having the first opening. a rivet (a conductive member welded to the second welding portion) inserted through the third through hole; and the above-described current collector plate accommodated in the case.
  • the first opening of the case may be, for example, circular or square, but is not limited to these.
  • the power storage element may be inserted into the case through the first opening.
  • the case may be curled in a region near the first opening.
  • the sealing member may be crimped by this curling process.
  • the case may have a recess that is recessed radially inward in a region where the sealing member is arranged. The sealing member may be compressed by this recess.
  • the sealing member may have a shape corresponding to the shape of the first opening.
  • the sealing member may be made of an insulating material (for example, resin).
  • the third through hole may be arranged, for example, in the center of the sealing member.
  • the third through hole may be, for example, circular, but is not limited to this.
  • the third through hole may penetrate the sealing member in its thickness direction.
  • the power storage element has a first electrode, a second electrode, and a separator interposed between the first electrode and the second electrode.
  • the first electrode, the second electrode, and the separator constitute a columnar wound body. That is, the first electrode and the second electrode are wound with the separator interposed therebetween.
  • the first electrode has a long sheet-like first current collector and a first active material layer carried on the first current collector.
  • the second electrode has a long sheet-like second current collector and a second active material layer carried on the second current collector.
  • the second current collector is exposed on the end face of the electricity storage element on the first opening side.
  • the exposed portion may not be provided with the second active material layer.
  • the first welded portion is welded to the second current collector exposed on the end face.
  • the second weld is welded with a rivet.
  • electrical connection between the storage element and the rivet is realized via the current collector plate.
  • the rivet functions as an external terminal of the electrical storage device B.
  • the first welded portion and the second current collector may be welded by laser welding, for example.
  • the second weld and the rivet may be welded by ultrasonic welding or laser welding, for example.
  • a method for manufacturing an electricity storage device includes a step of preparing a cylindrical case with a bottom, a step of preparing an electricity storage element, and and first to third steps.
  • the cylindrical case with a bottom may be made of a conductive material (for example, metal).
  • the case may have, for example, a bottomed cylindrical shape or a bottomed square tube shape, but is not limited to these.
  • a columnar electricity storage element is prepared.
  • the storage element includes a first electrode, a second electrode, and a separator interposed between the first electrode and the second electrode.
  • the first electrode, the second electrode, and the separator constitute a columnar wound body.
  • the first electrode has a long sheet-like first current collector and a first active material layer carried on the first current collector.
  • the second electrode has a long sheet-like second current collector and a second active material layer carried on the second current collector.
  • the first current collector is exposed on one end surface of the columnar storage element.
  • the above-described current collector plate In the step of preparing the above-described current collector plate, the above-described current collector plate to be welded to one end face of the electricity storage element is prepared.
  • the first welding portion of the current collector plate is welded to the first current collector exposed on one end face of the electricity storage element.
  • This welding may be performed, for example, by laser welding. Also, this welding may be performed in a state in which the exposed portion of the first current collector and the first welding portion are pressed against each other.
  • the storage element and current collecting plate are accommodated in the case.
  • the power storage element and the current collector may be accommodated so that the power collector is disposed between the inner bottom surface of the case and the power storage element.
  • the second welding part of the current collector plate is welded to the inner bottom surface of the case.
  • This welding may be performed, for example, by ultrasonic welding or laser welding.
  • this welding is performed in a state in which a device used for welding (for example, a long horn for ultrasonic welding) is accessed near the inner bottom surface through a cavity formed in the central portion of the power storage element. good too.
  • Another electricity storage device manufacturing method (hereinafter also referred to as manufacturing method B) includes a step of preparing an electricity storage element, a step of preparing the above-described current collector plate, and a sealing member. It comprises a preparing step, a rivet preparing step, and fourth to seventh steps.
  • a columnar electricity storage element is prepared.
  • the storage element includes a first electrode, a second electrode, and a separator interposed between the first electrode and the second electrode.
  • the first electrode, the second electrode, and the separator constitute a columnar wound body.
  • the first electrode has a long sheet-like first current collector and a first active material layer carried on the first current collector.
  • the second electrode has a long sheet-like second current collector and a second active material layer carried on the second current collector.
  • the second current collector is exposed on the other end face of the columnar power storage element.
  • a columnar power storage element is housed in a case having a first opening.
  • the above-described current collector plate In the step of preparing the above-described current collector plate, the above-described current collector plate to be welded to the other end face of the electricity storage element is prepared.
  • a sealing member that has a third through hole and seals the first opening of the case is prepared.
  • the sealing member may be made of an insulating material (for example, resin).
  • the third through hole may be arranged, for example, in the central portion of the sealing member.
  • the third through hole may be, for example, circular, but is not limited to this.
  • the rivet may have a convex portion inserted through the third through-hole and a flange portion continuous with a base end portion of the convex portion.
  • the convex portion may be, for example, cylindrical, but is not limited to this.
  • the flange portion may be, for example, circular, but is not limited to this.
  • the base end portion of the rivet for example, the flange portion described above
  • the second weld portion of the current collector plate are welded. This welding may be performed, for example, by ultrasonic welding or laser welding.
  • the first weld portion of the rivet-welded current collector plate is welded to the second current collector exposed on the other end surface of the power storage element housed in the case.
  • This welding may be performed, for example, by laser welding. Also, this welding may be performed in a state in which the exposed portion of the second current collector and the first welded portion are pressed against each other.
  • electrolyte is injected into the case.
  • the electrolytic solution can be efficiently injected through both the first through holes and the second through holes.
  • the sealing member seals the first opening of the case.
  • the peripheral edge of the sealing member may be crimped by curling the area near the first opening of the case.
  • the case may have a recessed portion that is recessed radially inward in a region where the sealing member is arranged. The sealing member may be compressed by this recess.
  • a method for manufacturing an electricity storage device includes the first to third steps of the manufacturing method A and the fourth to seventh steps of the manufacturing method B.
  • the execution order of the first to seventh steps is not restricted by the name of each step or the order of description.
  • the present disclosure it is possible to suppress quality deterioration of the electricity storage device (for example, deterioration of the connection between the current collector plate and the electricity storage element, deterioration of the characteristics of the electricity storage element, etc.). Furthermore, according to the present disclosure, it is possible to provide a high-quality power storage device.
  • the current collector plate for the power storage device for the power storage device according to the present disclosure, the power storage device, and the power storage device Components and steps not essential to the manufacturing method may be omitted. It should be noted that the drawings shown below are schematic and do not accurately reflect the actual shape and number of members.
  • the power storage device includes a lithium ion capacitor, an electric double layer capacitor, a lithium ion secondary battery, and the like. Also suitable for devices.
  • An electricity storage device or a lithium ion secondary battery using a conductive polymer for the positive electrode will be described below as an example.
  • the electricity storage device 10 of this embodiment includes a case 20, an electricity storage element 30, two current collector plates 40A and 40B, a sealing member 50, and a rivet 60, as shown in FIGS.
  • the case 20 is formed in a cylindrical shape with a bottom and has a first opening 21 .
  • the case 20 is made of a conductive material (for example, metal such as aluminum).
  • the case 20 may have, for example, a bottomed cylindrical shape or a bottomed square tube shape, but is not limited to these.
  • Case 20 is an example of a conductive member.
  • the power storage element 30 is housed in the case 20 together with an electrolytic solution (not shown).
  • the electricity storage element 30 has a long sheet-like first electrode 31, a long sheet-like second electrode 32, and a separator 33 interposed therebetween.
  • the first electrode 31, the second electrode 32, and the separator 33 form a columnar wound body.
  • the first electrode 31 has a long sheet-like first current collector 31a and a first active material layer (not shown) carried thereon.
  • the first electrode 31 of the present embodiment constitutes a negative electrode, but is not limited to this.
  • a sheet-like metal material is used for the first current collector 31a.
  • the sheet-shaped metal material may be a metal foil, a metal porous body, or the like.
  • metal materials copper, copper alloys, nickel, stainless steel, and the like can be used.
  • the thickness of the first current collector 31a is, for example, 10 ⁇ m or more and 100 ⁇ m or less.
  • the first active material layer contains, for example, a negative electrode active material, a conductive agent, and a binder.
  • a negative electrode mixture slurry containing a negative electrode active material, a conductive agent, and a binder is applied to both surfaces of the first current collector 31a, the coating film is dried, and then rolled.
  • a negative electrode active material is a material that absorbs and releases lithium ions.
  • carbon materials such as non-graphitizable carbon and graphite are preferable, and other materials include metal compounds, alloys, ceramic materials, and the like.
  • the second electrode 32 has a long sheet-like second current collector 32a and a second active material layer (not shown) carried thereon.
  • the second electrode 32 of the present embodiment constitutes a positive electrode, but is not limited to this.
  • a sheet-like metal material is used for the second current collector 32a.
  • the sheet-shaped metal material may be a metal foil, a metal porous body, or the like. Aluminum, an aluminum alloy, nickel, titanium, etc. can be used as the metal material.
  • the thickness of the second current collector 32a is, for example, 10 ⁇ m or more and 100 ⁇ m or less.
  • the second active material layer contains, for example, a positive electrode active material, a conductive agent, and a binder.
  • a positive electrode mixture slurry containing a positive electrode active material, a conductive agent, and a binder is applied to both surfaces of the second current collector 32a, the coating film is dried, and then rolled.
  • a positive electrode active material is a material that absorbs and releases lithium ions. Examples of positive electrode active materials include conductive polymers, lithium-containing transition metal oxides, transition metal fluorides, polyanions, fluorinated polyanions, and transition metal sulfides.
  • a ⁇ -conjugated polymer is preferable as the conductive polymer.
  • the ⁇ -conjugated polymer for example, polypyrrole, polythiophene, polyfuran, polyaniline, polythiophene vinylene, polypyridine, or derivatives thereof can be used.
  • a ⁇ -conjugated polymer derivative means a polymer having a ⁇ -conjugated polymer as a basic skeleton, such as polypyrrole, polythiophene, polyfuran, polyaniline, polythiophene vinylene, and polypyridine.
  • polythiophene derivatives include poly(3,4-ethylenedioxythiophene) (PEDOT) and the like.
  • a ⁇ -conjugated conductive polymer is preferred.
  • the conductive polymer is an organic substance and has low heat resistance, it is easily deteriorated by heat transferred from the first current collector plate 40A (described later).
  • the current collector plate having the above characteristics, heat can be efficiently diffused, and local concentration of heat can be suppressed.
  • the separator 33 for example, a microporous film made of resin such as polyolefin, woven fabric, non-woven fabric, or the like can be used.
  • the thickness of the separator 33 is, for example, 10 ⁇ m or more and 300 ⁇ m or less, preferably 10 ⁇ m or more and 40 ⁇ m or less.
  • the first current collector 31a is exposed on the end face on the bottom side (lower side in FIG. 2) of the case 20 of the electricity storage element 30. As shown in FIG. The second current collector 32a is exposed on the end face of the electricity storage element 30 on the side of the first opening 21 (upper side in FIG. 2).
  • the two current collector plates 40A and 40B are a first current collector plate 40A arranged between the power storage element 30 and the bottom surface of the case 20, and a second current collector plate 40A arranged between the power storage element 30 and the first opening 21. and a current collector plate 40B.
  • the first collector plate 40A and the second collector plate 40B are housed in the case 20, respectively.
  • the first collector plate 40A is formed in a circular shape, but is not limited to this.
  • the first collector plate 40A is made of a material containing copper (for example, copper or copper alloy).
  • the constituent material of the first collector plate 40A may be the same as or different from the constituent material of the first collector 31a.
  • the first collector plate 40A includes a central region 41, an outer peripheral region 42, and a bridge portion 43 connecting them.
  • the central region 41 is formed in a circular shape and arranged in the center of the first current collector plate 40A.
  • the central region 41 has a second welded portion 41a welded to the case 20 .
  • the second welded portion 41a is arranged in the center of the central region 41, but is not limited to this.
  • the outer peripheral region 42 is formed in a ring shape and arranged so as to surround the central region 41 .
  • Peripheral region 42 has a plurality of first welded portions 42a that are welded to end surfaces of power storage elements 30 .
  • Each first welded portion 42 a is arranged along the radial direction of the end surface of the power storage element 30 . As shown in FIG. 1, the first welded portion 42a is convex toward the power storage element 30 (upward in FIG. 2).
  • bridge portions 43 are provided in this embodiment, two or more may be provided, or four or more may be provided. However, from the viewpoint of suppressing deformation such that the central region 41 and the outer peripheral region 42 are twisted relative to each other, it is preferable that three or more bridge portions 43 are provided.
  • the plurality of bridge portions 43 may be arranged at equal intervals in the circumferential direction of the first current collector plate 40A, or may be arranged at unequal intervals.
  • each bridge portion 43 is 0.044 mm 2 or more.
  • the cross-sectional area of the bridge portion 43 refers to the cross-sectional area of the bridge portion 43 in a cross section perpendicular to the radial direction of the first current collector plate 40A.
  • A/B ⁇ 0.8 is satisfied, where A [mm] is the width of the bridge portion 43 and B [mm] is the thickness of the first collector plate 40A.
  • the width of the bridge portion 43 refers to the dimension of the bridge portion 43 along the circumferential direction of the first collector plate 40A.
  • a plurality of slit-shaped first through-holes 44 are provided between each of the first welded portions 42a and the second welded portions 41a so as to surround the central region 41 .
  • the first through hole 44 has a curved shape along the circumferential direction of the first collector plate 40A.
  • the first through holes 44 of the present embodiment extend along the circumferential direction of the first collector plate 40A over the entirety. Both ends of the first through hole 44 have a rounded shape. As a result, concentration of stress on the end portions of the bridge portions 43 is suppressed, so breakage of the bridge portions 43 can be suppressed.
  • the dimension of the first through hole 44 is longer than the dimension of the first welded portion 42a in the circumferential direction of the first current collector plate 40A. Therefore, both ends of the first through-hole 44 protrude further than the first welded portion 42a in the circumferential direction. In other words, the bridge portion 43 and the first welded portion 42a are separated from each other in the circumferential direction of the first current collector plate 40A.
  • the first current collector plate 40A further includes second through holes 45 that are provided between the plurality of first welded portions 42a and that are different from the first through holes 44 .
  • second through holes 45 are provided, but the present invention is not limited to this.
  • a plurality of (two in this example) second through holes 45 are provided between the adjacent first welded portions 42a.
  • the first welded portion 42a of the first current collector plate 40A is welded to the first current collector 31a exposed at the end face of the storage element 30 on the bottom side. This welding may be done, for example, by laser welding.
  • a second welded portion 41 a of the first current collector plate 40 A is welded to the inner bottom surface of the case 20 . This welding may be done, for example, by ultrasonic welding.
  • the second current collector plate 40B is made of a material containing aluminum (for example, aluminum or an aluminum alloy).
  • the constituent material of the second collector plate 40B may be the same as or different from the constituent material of the second collector 32a.
  • the configuration of the second collector plate 40B is basically the same as the configuration of the first collector plate 40A. However, in the second current collector plate 40B, the minimum cross-sectional area of the bridge portion 43 is 0.117 mm 2 or more.
  • the first welded portion 42a of the second collector plate 40B is welded to the second collector 32a exposed at the end face of the storage element 30 on the first opening 21 side. This welding may be done, for example, by laser welding.
  • a second welded portion 41a of the second current collector plate 40B is welded to the base end portion of the rivet 60 . This welding may be done, for example, by ultrasonic welding.
  • the ends of the second collector plate 40B and the second electrode 32 are covered with an insulating ring 70 so as to prevent contact with the case 20. As shown in FIG.
  • the sealing member 50 seals the first opening 21 of the case 20 .
  • the sealing member 50 has a shape corresponding to the shape of the first opening 21 .
  • the sealing member 50 of this embodiment is formed in a disk shape, it is not limited to this.
  • the sealing member 50 has a third through-hole 51 formed in its central portion and penetrating the sealing member 50 in the thickness direction (vertical direction in FIG. 2).
  • the sealing member 50 is made of, for example, an elastic material such as butyl rubber.
  • the rivet 60 is inserted through the third through hole 51 of the sealing member 50 .
  • the constituent material of the rivet 60 may be the same as or different from the constituent material of the second current collector plate 40B.
  • Rivet 60 is an example of a conductive member.
  • the method for manufacturing the electricity storage device of the present embodiment includes the steps of preparing the case 20 described above, preparing the electricity storage element 30 described above, and preparing the first and second collector plates 40A and 40B described above. , a step of preparing the above-described sealing member 50, a step of preparing the above-described rivet 60, and first to seventh steps.
  • the first welded portion 42a of the first current collector plate 40A is welded to the first current collector 31a exposed on one end surface of the electricity storage element 30 .
  • This welding may be done, for example, by laser welding.
  • the storage element 30 and the first collector plate 40A are accommodated in the case 20.
  • the first collector plate 40A is arranged between the power storage element 30 and the inner bottom surface of the case 20 .
  • the second welding portion 41a of the first collector plate 40A is welded to the inner bottom surface of the case 20.
  • This welding may be done, for example, by ultrasonic welding.
  • the base end portion of the rivet 60 and the second welding portion 41a of the second current collector plate 40B are welded.
  • This welding may be done, for example, by ultrasonic welding.
  • the first welded portion 42a of the second collector plate 40B to which the rivet 60 is welded is welded to the second collector 32a exposed on the other end face of the electricity storage element 30 .
  • This welding may be done, for example, by laser welding.
  • electrolyte is injected into the case 20 .
  • the electrolytic solution is injected through the first through holes 44 and the second through holes 45 .
  • the sealing member 50 seals the first opening 21 of the case 20 .
  • the sealing member 50 is compressed by a part of the case 20 and the edge of the exposed surface of the sealing member 50 is crimped by the edge of the case 20 .
  • the power storage device 10 of the present embodiment can be obtained.
  • the power storage device 10 of this embodiment differs from that of the first embodiment in the shape of the first through hole 44 . Differences from the first embodiment will be mainly described below.
  • the first through hole 44 of the first collector plate 40A (or the second collector plate 40B) has a first portion 44a extending in the circumferential direction of the first collector plate 40A and a first portion 44a. and a second portion 44b extending along the radial direction of the first current collector plate 40A from both ends of 44a.
  • the second portion 44b extends radially outward from the first current collector plate 40A from both ends of the first portion 44a.
  • the end of the second portion 44b has a rounded shape.
  • the present disclosure can be used for a current collector plate for an electricity storage device, an electricity storage device, and a method for manufacturing an electricity storage device.
  • Electricity storage device 20 Case (conductive member) 21: First opening 30: Electricity storage element 31: First electrode 31a: First current collector 32: Second electrode 32a: Second current collector 33: Separator 40A: First current collector (current collector) 40B: Second current collector (current collector) 41: Central region 41a: Second welded portion 42: Peripheral region 42a: First welded portion 43: Bridge portion 44: First through hole 44a: First portion 44b: Second portion 45: Second through hole 50: Sealing Member 51: Third through hole 60: Rivet (conductive member) 70: insulating ring

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Batteries Or Terminals (AREA)
PCT/JP2022/033202 2021-09-22 2022-09-05 蓄電デバイス用の集電板、蓄電デバイス、および蓄電デバイスの製造方法 Ceased WO2023047925A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2023549451A JPWO2023047925A1 (https=) 2021-09-22 2022-09-05
CN202280060024.9A CN117916835A (zh) 2021-09-22 2022-09-05 蓄电设备用的集电板、蓄电设备以及蓄电设备的制造方法
US18/692,719 US20240380078A1 (en) 2021-09-22 2022-09-05 Collector plate for power storage device, power storage device, and power storage device production method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021154535 2021-09-22
JP2021-154535 2021-09-22

Publications (1)

Publication Number Publication Date
WO2023047925A1 true WO2023047925A1 (ja) 2023-03-30

Family

ID=85720572

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2022/033202 Ceased WO2023047925A1 (ja) 2021-09-22 2022-09-05 蓄電デバイス用の集電板、蓄電デバイス、および蓄電デバイスの製造方法

Country Status (4)

Country Link
US (1) US20240380078A1 (https=)
JP (1) JPWO2023047925A1 (https=)
CN (1) CN117916835A (https=)
WO (1) WO2023047925A1 (https=)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4664498A1 (en) * 2024-06-11 2025-12-17 Skeleton Technologies GmbH A method for welding at least one cell component to an electrode assembly of an energy storage cell

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20260001065A (ko) * 2024-06-26 2026-01-05 주식회사 엘지에너지솔루션 집전체 및 이를 포함하는 배터리 셀, 배터리 팩 및 자동차
CN119275498A (zh) * 2024-09-02 2025-01-07 东莞市创明电池技术有限公司 集流片及动力电池

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001256954A (ja) * 2000-03-10 2001-09-21 Sony Corp 蓄電装置
JP2006278013A (ja) * 2005-03-28 2006-10-12 Sanyo Electric Co Ltd 電池及びその製造方法
WO2015098866A1 (ja) * 2013-12-26 2015-07-02 新神戸電機株式会社 蓄電デバイス
JP2016012393A (ja) * 2012-10-30 2016-01-21 三洋電機株式会社 蓄電池モジュール

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001256954A (ja) * 2000-03-10 2001-09-21 Sony Corp 蓄電装置
JP2006278013A (ja) * 2005-03-28 2006-10-12 Sanyo Electric Co Ltd 電池及びその製造方法
JP2016012393A (ja) * 2012-10-30 2016-01-21 三洋電機株式会社 蓄電池モジュール
WO2015098866A1 (ja) * 2013-12-26 2015-07-02 新神戸電機株式会社 蓄電デバイス

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4664498A1 (en) * 2024-06-11 2025-12-17 Skeleton Technologies GmbH A method for welding at least one cell component to an electrode assembly of an energy storage cell

Also Published As

Publication number Publication date
JPWO2023047925A1 (https=) 2023-03-30
CN117916835A (zh) 2024-04-19
US20240380078A1 (en) 2024-11-14

Similar Documents

Publication Publication Date Title
WO2023047925A1 (ja) 蓄電デバイス用の集電板、蓄電デバイス、および蓄電デバイスの製造方法
JP4401065B2 (ja) 二次電池及びその製造方法
JP3334683B2 (ja) 非水電解液二次電池およびその製造方法
JP6208687B2 (ja) 円筒形二次電池及びその製造方法
KR102668193B1 (ko) 캡 조립체 및 이를 포함하는 이차 전지
JP5081932B2 (ja) 密閉型電池およびその製造方法
EP3972044B1 (en) Secondary battery and terminal for secondary battery and manufacturing method thereof
JP7662695B2 (ja) 端子の製造方法
KR20210012636A (ko) 이차 전지
KR102780825B1 (ko) 이차 전지 및 그의 제조 방법
KR20100089092A (ko) 이차 전지
JP2010003692A (ja) 電極組立体とこれを利用した二次電池及びその製造方法
KR20150117135A (ko) 전극 조립체 및 이를 구비한 이차 전지
JP6729137B2 (ja) 二次電池及びその製造方法、並びにそれを用いた組電池
US12407047B2 (en) Battery and method of manufacturing same
US11063311B2 (en) Battery with external terminals
US9911543B2 (en) Capacitor
US8936869B2 (en) Sealed cell and method of manufacture thereof
KR100786871B1 (ko) 이차 전지
CN111902968A (zh) 电池以及其制造方法
KR102824566B1 (ko) 원통형 이차전지
JP7247893B2 (ja) 蓄電素子
JP2022092680A (ja) 密閉型電池および密閉型電池の製造方法
JP2020053633A (ja) 電気化学デバイス及び電気化学デバイスの製造方法
EP4576348A1 (en) Battery cell and method for manufacturing a battery cell

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22872681

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 202280060024.9

Country of ref document: CN

Ref document number: 2023549451

Country of ref document: JP

WWE Wipo information: entry into national phase

Ref document number: 18692719

Country of ref document: US

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 22872681

Country of ref document: EP

Kind code of ref document: A1