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KR-20260067275-A - A BATTERY, AN ELECTRONIC DEVICE INCLUDING THE SAME AND A MANUFACTURING METHOD THEREOF

KR20260067275AKR 20260067275 AKR20260067275 AKR 20260067275AKR-20260067275-A

Abstract

A battery according to one embodiment of the present disclosure comprises: a case; and a battery cell disposed inside the case and comprising a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode, wherein the positive electrode may comprise: a positive current collector comprising a first surface facing a first direction and a second surface facing a second direction opposite to the first direction; a first positive tab comprising a connection portion connected to a part of the first surface of the positive current collector; a second positive tab comprising a connection portion connected to a part of the second surface of the positive current collector; a first positive active layer applied to the first surface of the first positive current collector and the connection portion of the first positive tab; and a second positive active layer applied to the second surface of the positive current collector and the connection portion of the second positive tab.

Inventors

  • 김시현
  • 박타리
  • 서정욱

Assignees

  • 삼성전자주식회사

Dates

Publication Date
20260512
Application Date
20250122
Priority Date
20241105

Claims (20)

  1. In the battery (401), Case (402); and A battery cell (403; 603) comprising a positive electrode (410; 610)), a negative electrode (430; 530; 630), and a separator (420; 620) disposed between the positive electrode and the negative electrode, wherein the battery cell (403; 603) is disposed inside the above case and comprises a positive electrode (410; 610)), a negative electrode (430; 530; 630), and a separator (420; 620) disposed between the positive electrode and the negative electrode. The above positive electrode comprises a positive electrode current collector (411) having a first surface (411a) facing a first direction and a second surface (411b) facing a second direction opposite to the first direction; A first positive tab (412a; 612a) including a first connecting portion (4121a; 6121a) connected to a part of the first surface of the positive current collector; A second positive tap (412b; 612b) including a second connecting portion (4121b; 6121b) connected to a part of the second surface of the positive current collector; A first positive active layer (413a) applied to the first surface of the positive current collector and the connection portion of the first positive tab; and A battery comprising a second positive active layer (413b) applied to the second surface of the positive current collector and the connection portion of the second positive tab.
  2. In Article 1, The above positive current collector comprises a first film layer (4113), a first metal layer (4111) disposed on one side (4113a) of the first film layer facing the first direction and forming the first surface of the positive current collector, and a second metal layer (4112) disposed on the other side (4113b) of the film layer facing the second direction and forming the second surface. The first anode tab and the second anode tab include a metal material, and A battery in which one of the first positive tab and the second positive tab is connected to the first metal layer, and the other of the first positive tab and the second positive tab is connected to the second metal layer.
  3. In Article 1 or Article 2, The above battery cell includes a plurality of stacked battery cells (403; 603), and The battery of the above electronic device is, 2-1 anode (440a), 2-2 anode (440b), The plurality of battery cells are disposed between the second-1 positive electrode and the second-2 positive electrode, and A battery comprising each of the above-mentioned second-1 positive electrode and the above-mentioned second-2 positive electrode including an outermost positive electrode current collector (441) having a third surface (4411) facing the plurality of battery cells, an outermost positive electrode tab (442) having an outermost connection part (4421) connected to the third surface of the outermost positive electrode current collector, and a third positive electrode active layer (443) applied to the third surface and the outermost connection part of the outermost positive electrode tab.
  4. In any one of paragraphs 1 to 3, The first positive tab includes a first extension portion (4122a) extending from the connection portion of the first positive tab, and a first fold portion (41221a) extending from the first extension portion and folded at a position corresponding to the end portion (421) of the separator. The second positive tab includes a second extension portion (4122b) extending from the connection portion of the second positive tab, and a second fold portion (41221b) extending from the second extension portion and folded at a position corresponding to the end portion (421) of the separator. The first positive tab and the second positive tab are extended to form an electrode tab (4041, 6041) in a battery.
  5. In any one of paragraphs 1 to 4, The connection portion of the first positive tab is fixed to the first surface of the positive current collector, and the first positive active layer is disposed between the first connection portion and the negative electrode such that the first connection portion and the negative electrode are spaced apart from each other. A battery in which the connection portion of the second positive tab is fixed to the second surface of the positive current collector, and the second positive active layer is disposed between the second connection portion and the negative electrode such that the second connection portion and the negative electrode are spaced apart from each other.
  6. In any one of paragraphs 1 to 5, A battery in which the connection portion of the first positive tab and the connection portion of the second positive tab are each fixed to the positive current collector by welding or brazing.
  7. In any one of paragraphs 1 through 6, The above cathode (530) cathode current collector (531), A first cathode tab (532a) including a cathode connection portion (5321a) connected to a part of one side of the cathode current collector; A second cathode tab (532b) including a cathode connection portion (5321b) connected to a part of the other side of the above cathode current collector, and A battery comprising a first negative active layer (533a) applied to one side of the negative current collector and the negative connection portion of the first negative tab, and a second negative active layer (533b) applied to the other side of the first negative current collector and the negative connection portion of the second negative tab.
  8. In Article 7, The above-mentioned cathode current collector comprises a second film layer (5313), a first cathode metal layer (5311) disposed on one side (5313a) of the second film layer, and a second cathode metal layer (5312) disposed on the other side (5313b) of the second film layer. The first cathode tab and the second cathode tab each comprise a metal material, and A battery in which one of the first cathode tab and the second cathode tab is connected to the first cathode metal layer, and the other of the first cathode tab and the second cathode tab is connected to the second cathode metal layer.
  9. In Article 7 or Article 8, The battery comprises a first negative bend (53221a) that is bent and extends away from the negative electrode from the negative electrode connection portion of the first negative electrode tab, and a second negative bend (53221b) that is bent and extends away from the negative electrode from the negative electrode connection portion of the second negative electrode tab.
  10. In any one of paragraphs 7 through 9, The first positive tab and the second positive tab of the first positive are electrically connected to a first lead tab (60411) that is partially disposed inside the battery case, and A battery in which the first cathode tab and the second cathode tab of the above cathode are each electrically connected to a second lead tab (60421) which is partially positioned inside the battery case at a position opposite to the first lead tab.
  11. In any one of paragraphs 1 through 10, A battery in which the first hardness of the first current collector (415a), which includes the connection portion of the first positive tab and the connection portion of the second positive tab, is greater than the second hardness of the second current collector (415b), which includes the positive current collector without the connection portion of the first positive tab and the connection portion of the second positive tab.
  12. In any one of paragraphs 1 to 11, The above positive current collector comprises two metal layers spaced apart from each other and a polymer disposed between the two metal layers.
  13. In the electronic device (101), Housing (210); and A battery (401; 601) disposed inside the housing, comprising a case (402) forming the exterior of the battery and a plurality of battery cells (403; 603) disposed inside the case, Each of the above plurality of battery cells includes a first positive electrode (410; 610), a negative electrode (430; 530; 630) spaced apart from the first positive electrode, and a separator (420; 620) disposed between the first positive electrode and the negative electrode. The above-mentioned first anode is, A first positive current collector (411) comprising a first surface (411a; 611a) facing a first direction and a second surface (411b; 611b) facing a second direction opposite to the first direction, A first-1 positive substrate (412; 612a) comprising a first-1 connecting portion (4121a) respectively connected to one end of one side (411a) of the first positive current collector and a first-1 extension portion (4122a) extending from the first-1 connecting portion in a direction away from the first positive current collector; A first-1 positive active layer comprising a first-1 positive active portion (4131a; 6131a) applied to the first surface of the first positive current collector, and further comprising a first-1 positive active layer (413a) which includes a first-2 positive active portion (4132a) extending from the first-1 positive active portion and covering the first-1 connection portion disposed between the first-1 positive active layer and the first positive current collector. An electronic device comprising a first-1 bend portion (41221a) in which the extension portion of the plurality of battery cells is bent to form a part of an electrode tab (4041) that is electrically connected to a lead tab (40411).
  14. In Article 13, The above cathode (530) First negative current collector (531), A first-1 cathode substrate (532a) comprising a first-1 cathode connection portion (5321a) connected to the edge of one side of the first cathode current collector and a first-1 cathode extension portion (5322a) extending from the first-1 cathode connection portion; A first-second cathode substrate (532b) comprising a first-second cathode connection portion (5321b) connected to the edge of the other side of the first cathode current collector and a first-second cathode extension portion (5322b) extending from the first-second cathode connection portion, and An electronic device comprising a first-1 cathode active layer (533a) applied to one side of the first cathode current collector and the first-1 cathode connection portion, and a first-2 cathode active layer (533b) applied to the other side of the first cathode current collector and the first-2 cathode connection portion.
  15. In Article 13 or Article 14, The above-mentioned first-1 connecting part is an electronic device connected by welding between one end of the first positive current collector and the second part.
  16. In any one of paragraphs 13 to 15, The first positive current collector comprises two metal layers spaced apart from each other and a polymer disposed between the two metal layers. The above-mentioned first-1 anode substrate is formed of a metal material, and The above-mentioned first-1 connection is an electronic device connected to one end of one of the two metal layers.
  17. In the method (700) for manufacturing a battery of an electronic device, A first positive current collector providing operation (710) that provides a first positive current collector including two metal layers and a film layer between the two metal layers; A coupling operation (720; 820) of connecting a portion of another single second positive current collector to one end of the above positive current collector; A coating operation (730) of applying a first positive active layer to the first positive current collector and the second positive current collector; and A method for manufacturing a battery of an electronic device comprising a battery cell coupling operation (740) in which a separator and a cathode are laminated while the first positive current collector and the second positive current collector are coated with the first positive active layer.
  18. In Article 17, A method for manufacturing a battery of an electronic device, wherein the joining operation of the second positive current collector and the first positive current collector comprises an operation (821) of overlapping a portion of each of the second positive current collector and the first positive current collector, and an operation (822) of joining by welding at the portion where a portion of each of the first positive current collector and the second positive current collector is overlapped.
  19. In Article 17 or Article 18, A method for manufacturing a battery of an electronic device, wherein the first positive active layer coating operation comprises coating such that a portion of the second positive current collector coupled to the first positive current collector is disposed between the first positive active layer and the first positive current collector.
  20. In paragraphs 17 through 19, The operation of stacking the above battery cells in multiple layers (901); The operation of combining the stacked battery cells (902); A method for manufacturing a battery of an electronic device, further comprising the operation (903) of bending another part of the second positive current collector layer of the plurality of stacked battery cells.

Description

A battery, an electronic device including the same, and a manufacturing method thereof. Various embodiments of the present disclosure relate to batteries, for example, batteries and electronic devices including the same. Driven by remarkable advancements in information and communication technology and semiconductor technology, the distribution and use of various electronic devices are increasing rapidly. In particular, recent electronic devices are being developed to enable portable communication. The term "electronic device" refers to a device that performs specific functions according to an installed program, ranging from home appliances to electronic notebooks, portable multimedia players, mobile communication terminals, tablet PCs, video/audio devices, desktop/laptop computers, and in-car navigation systems. For example, these electronic devices can output stored information as sound or video. As the integration density of electronic devices increases and ultra-high-speed, high-capacity wireless communication becomes commonplace, various functions can recently be integrated into a single electronic device, such as a mobile communication terminal. For instance, not only communication functions but also entertainment functions like games, multimedia functions like music/video playback, communication and security functions like mobile banking, and functions such as schedule management or electronic wallets are being integrated into a single electronic device. With the increase in the usage time of electronic devices, there is a demand to increase battery capacity and reduce the mounting space occupied by the battery to enable miniaturization. As battery capacity increases and miniaturization occurs, there have been difficulties in securing space for tab bending and ensuring stability to prevent battery short circuits. The information described above may be provided as background art for the purpose of aiding understanding of the present disclosure. No claim or determination is made as to whether any of the foregoing may be applied as prior art related to the present disclosure. The aspects, configurations, and/or advantages described above regarding various embodiments of the present disclosure may become more apparent from the following detailed description with reference to the accompanying drawings. FIG. 1 is a block diagram of an electronic device in a network environment according to various embodiments. FIG. 2 is a perspective view showing the front of an electronic device according to one embodiment of the present disclosure. FIG. 3 is a perspective view showing the rear side of an electronic device according to one embodiment of the present disclosure. FIG. 4 is an exploded perspective view showing the front of an electronic device according to one embodiment of the present disclosure. FIG. 5 is an exploded perspective view showing the rear side of an electronic device according to one embodiment of the present disclosure. FIG. 6 is a perspective view showing the front of a battery according to one embodiment of the present disclosure. FIG. 7 is a perspective view conceptually showing cross-section A-A' of the battery shown in FIG. 6 according to one embodiment of the present disclosure. FIG. 8 is a conceptual diagram of an enlarged area S2 shown in FIG. 7 according to one embodiment of the present disclosure. FIG. 9a is an enlarged conceptual diagram of the region S4 shown in FIG. 8 according to one embodiment of the present disclosure. FIG. 9b is an enlarged conceptual diagram of a part of a battery cell according to one embodiment of the present disclosure. FIG. 10 is a conceptual diagram of an enlarged area S3 shown in FIG. 7 according to one embodiment of the present disclosure. FIG. 11a is an enlarged conceptual diagram of a portion of a battery cell according to one embodiment of the present disclosure. FIG. 11b is an enlarged conceptual diagram of a portion of a battery cell according to one embodiment of the present disclosure. FIG. 12 is a perspective view conceptually showing cross-section A-A' of the battery illustrated in FIG. 6 according to one embodiment of the present disclosure. FIG. 13 is a drawing illustrating a method for manufacturing a battery according to one embodiment of the present disclosure. FIG. 14 is a drawing illustrating a method for manufacturing a battery according to one embodiment of the present disclosure. FIG. 15 is a drawing illustrating a method for manufacturing a battery according to one embodiment of the present disclosure. Throughout the attached drawings, similar parts, configurations, and/or structures may be assigned similar reference numbers. FIG. 1 is a block diagram of an electronic device (101) in a network environment (100) according to one embodiment. Referring to FIG. 1, in a network environment (100), an electronic device (101) may communicate with an electronic device (102) through a first network (198) (e.g., a short-range wireless communicat