CN-121983508-A - Electrode assembly and method of manufacturing the same

Abstract

The present application relates to an electrode assembly and a method of manufacturing the electrode assembly. The electrode assembly includes an electrode plate including a coated portion in which an active material is coated on both sides of a composite substrate and an uncoated portion in which the active material is not provided on the composite substrate, a conductor coupled to the uncoated portion, and an insulating layer covering at least a portion of each of the uncoated portion, the coated portion, and the conductor. The uncoated portion is coupled to a first side of the conductor and the insulating layer is disposed on a second side of the conductor opposite the first side of the conductor.

Inventors

• ZHENG GUANGCHAO

Assignees

• 三星SDI株式会社

Dates

Publication Date

20260505

Application Date

20251031

Priority Date

20241031

Claims (20)

1. 1. An electrode assembly, the electrode assembly comprising: an electrode plate including a coated portion in which an active material is coated on both sides of a composite substrate and an uncoated portion in which the active material is not provided on the composite substrate; A conductor coupled to the uncoated portion, and An insulating layer covering at least a portion of each of the uncoated portion, the coated portion, and the conductor, Wherein the uncoated portion is coupled to a first side of the conductor, an Wherein the insulating layer is disposed on a second side of the conductor opposite the first side of the conductor.
2. 2. The electrode assembly of claim 1, wherein the composite substrate comprises: a polymer substrate; A first metal layer on the first surface of the polymer substrate, and A second metal layer on the second surface of the polymer substrate, and Wherein the first metal layer and the second metal layer are formed of the same material.
3. 3. The electrode assembly of claim 1, wherein the conductor comprises a region coupled to the uncoated portion, Wherein the region is located inside the insulating layer when viewed in a direction perpendicular to the second side of the conductor.
4. 4. The electrode assembly of claim 3, wherein the region is spaced apart from the coated portion.
5. 5. The electrode assembly of claim 4, wherein the region is spaced apart from the coated portion by a distance of at least 0.3mm.
6. 6. The electrode assembly of claim 3, wherein an upper end of the insulating layer is located at least 0.5mm higher than an upper end of the region.
7. 7. The electrode assembly according to claim 3, wherein a portion of the insulating layer covering the region of the conductor is a first insulating layer, and Wherein the insulating layer further comprises a second insulating layer connected to the first insulating layer and covering the uncoated portion between the region and the coated portion.
8. 8. The electrode assembly of claim 7, wherein the insulating layer further comprises a third insulating layer connected to the second insulating layer and covering at least a portion of the coated portion.
9. 9. The electrode assembly according to claim 8, wherein a lower end portion of the third insulating layer is located at least 0.3mm lower than an upper end portion of the coating portion.
10. 10. The electrode assembly of claim 3, wherein the polarity of the composite substrate is positive, and The longitudinal length of the zone is 1.5mm to 5.5mm.
11. 11. The electrode assembly of claim 3, wherein the polarity of the composite substrate is negative, and The longitudinal length of the zone is 2.0mm to 6.0mm.
12. 12. The electrode assembly of claim 2, wherein the conductor comprises a first conductor coupled to the first metal layer, and a second conductor coupled to the second metal layer, and Wherein the first conductor includes a first region coupled to the first metal layer and a second region coupled to the second conductor.
13. 13. The electrode assembly of claim 12, wherein the second region is spaced apart from the first region.
14. 14. The electrode assembly of claim 12, wherein the insulating layer comprises: A first insulating layer, wherein the first region is inside the first insulating layer when viewed in a direction perpendicular to the second side of the conductor, and A second insulating layer connected to the first insulating layer, and Wherein the second region is located inside the second insulating layer when viewed in a direction perpendicular to the second side of the conductor.
15. 15. The electrode assembly of claim 14, wherein a longitudinal length of the second insulating layer is at least 0.25 times a longitudinal length of the first insulating layer.
16. 16. The electrode assembly of claim 12, wherein an end of the second conductor corresponds to an end of the second region.
17. 17. The electrode assembly of claim 1, wherein the insulating layer comprises at least one of alumina and boehmite.
18. 18. The electrode assembly of claim 1, wherein the insulating layer comprises a ceramic material and a binder, and Wherein the ratio of the binder to the ceramic material is 15wt% to 45wt%.
19. 19. A method of manufacturing an electrode assembly, the method comprising: Preparing a plurality of electrode plates, each electrode plate including a coated portion in which an active material is coated on both sides of a composite substrate and an uncoated portion in which the active material is not provided on the composite substrate; coupling a conductor to the uncoated portion of each electrode plate; Providing an insulating layer to cover the uncoated portion of each electrode plate, the coated portion of each electrode plate, and at least a portion of each of the conductors, and The plurality of electrode plates coupled to the conductor and on which the insulating layer is disposed and a separator interposed between the plurality of electrode plates are laminated.
20. 20. The method of claim 19, wherein the composite substrate comprises: A polymeric substrate having a first surface and a second surface, A first metal layer disposed on the first surface of the polymer substrate, and A second metal layer disposed on the second surface of the polymer substrate, and Wherein the first metal layer and the second metal layer are formed of the same material.

Description

Electrode assembly and method of manufacturing the same Technical Field Aspects of the present disclosure relate to an electrode assembly and a method of manufacturing the electrode assembly. Background Unlike primary batteries, which are not designed to be (re) chargeable, secondary (or rechargeable) batteries are batteries designed to be discharged and re-charged. Low-capacity secondary batteries are used in portable small-sized electronic devices such as smart phones, functional cellular phones, notebook computers, digital cameras, and video cameras, and high-capacity secondary batteries are widely used as power sources for driving motors in hybrid vehicles and electric vehicles and for energy storage (e.g., home and/or utility-scale energy storage). The secondary battery generally includes an electrode assembly composed of a positive electrode and a negative electrode, a case accommodating the electrode assembly, and an electrode terminal connected to the electrode assembly. IT is required to reduce the weight of secondary batteries used in portable IT devices, automobiles, and the like. In order to reduce the weight of the secondary battery, conventional techniques have been developed to make materials used in the secondary battery thinner such as a substrate, a separator, and an external material or to improve physical properties of an active material in order to increase energy density. However, some of these developments result in a decrease in the safety of the secondary battery. The above information disclosed in this background section is for enhancement of understanding of the background of the present disclosure and, therefore, may contain information that does not constitute a related art (or prior art). Disclosure of Invention Embodiments of the present disclosure provide an electrode assembly and a method of manufacturing the electrode assembly. These and other aspects and features of the present disclosure will be described in, or will be apparent from, the following description of embodiments of the present disclosure. The electrode assembly of the present disclosure includes an electrode plate including a coated portion in which an active material is coated on both sides of a composite substrate and an uncoated portion in which the active material is not provided on the composite substrate, a conductor coupled to the uncoated portion, and an insulating layer covering at least a portion of each of the uncoated portion, the coated portion, and the conductor, wherein the uncoated portion is coupled to a first side of the conductor, and the insulating layer is disposed on a second side of the conductor opposite to the first side of the conductor. According to an embodiment, the composite substrate includes a polymeric substrate, a first metal layer on a first surface of the polymeric substrate, and a second metal layer on a second surface of the polymeric substrate, and the first metal layer and the second metal layer are formed of the same material. According to an embodiment, the conductor comprises a region coupled to the uncoated portion, and the region is located inside the insulating layer when seen in a direction perpendicular to the second side of the conductor. According to an embodiment, the zone is spaced apart from the coated portion. According to an embodiment, the zone is spaced apart from the coated portion by a distance of at least 0.3mm. According to an embodiment, the upper end of the insulating layer is located at least 0.5mm higher than the upper end of the region. According to an embodiment, the portion of the insulating layer covering the region of the conductor is a first insulating layer, and the insulating layer further comprises a second insulating layer connected to the first insulating layer and covering the uncoated portion between the region and the coated portion. According to an embodiment, the insulating layer further comprises a third insulating layer connected to the second insulating layer and covering at least a part of the coated portion. According to an embodiment, the lower end of the third insulating layer is located at least 0.3mm lower than the upper end of the coating portion. According to an embodiment, the polarity of the composite substrate is positive and the longitudinal length of the zone is 1.5mm to 5.5mm. According to an embodiment, the polarity of the composite substrate is negative and the longitudinal length of the zone is 2.0mm to 6.0mm. According to an embodiment, the conductor includes a first conductor coupled to the first metal layer and a second conductor coupled to the second metal layer, and the first conductor includes a first region coupled to the first metal layer and a second region coupled to the second conductor. According to an embodiment, the second zone is spaced apart from the first zone. According to an embodiment, the insulating layer comprises a first insulating layer, wherein the first region is inside the first insu