CN-122025954-A - Battery and battery pack including the same

Abstract

The invention discloses a battery and a battery pack including the same. A battery includes a case, an electrode assembly received in the case and including an electrode, a tab connected to and extending from the electrode assembly, a cap assembly facing the electrode assembly and including a terminal, and a current collector assembly disposed between the electrode assembly and the cap assembly and including a current collector plate coupled to the tab and a current collector connected to the current collector plate and coupled to the terminal.

Inventors

• DING YANHU
• LIN XIANYING

Assignees

• 三星SDI株式会社

Dates

Publication Date

20260512

Application Date

20250922

Priority Date

20241112

Claims (20)

1. 1. A battery, comprising: A housing; an electrode assembly accommodated in the case and including an electrode; A tab connected to the electrode and extending from the electrode assembly; a cap assembly facing the electrode assembly and including a terminal, and A current collector assembly disposed between the electrode assembly and the cap assembly, and including a current collector plate coupled to the tab and a current collector connected to the current collector plate and coupled to the terminal.
2. 2. The battery of claim 1, wherein the current collector and the current collector plate are assembled by a male-female fit.
3. 3. The battery of claim 2, wherein The current collector includes a coupling protrusion at one end portion of the current collector, and The current collector plate includes a coupling hole into which the coupling protrusion can be inserted and coupled.
4. 4. The battery according to claim 3, wherein the current collector further comprises a current collector body joined to the terminal through the other end portion of the current collector, and a flange between the current collector body and the coupling protrusion to face-contact with the current collector plate.
5. 5. The battery of claim 4, wherein the current collector body, the flange, and the coupling protrusion are integrally formed.
6. 6. The battery of claim 5, wherein The current collector body has a cylindrical shape with a first diameter and a first height, and The flange has a cylindrical shape with a second diameter that is greater than the first diameter and a second height that is less than the first height.
7. 7. The battery of claim 6, wherein the current collector body is forged from round bar material.
8. 8. The battery according to claim 4 or 6, wherein the current collector and the current collector plate are joined by butt welding.
9. 9. The battery of claim 3, wherein the current collector plate includes a first sub-plate in which the coupling hole is defined, and a second sub-plate extending from at least one side of the first sub-plate and coupled to the tab.
10. 10. The battery of claim 9, wherein The tab includes an inner tab and an outer tab extending from the electrodes of the electrode assembly having the same polarity and spaced apart from each other, and The second sub-board includes an inner board bonded to the inner tab and an outer board bonded to the outer tab, wherein the inner board and the outer board extend from opposite sides of the first sub-board.
11. 11. A battery, comprising: A housing; an electrode assembly accommodated in the case and including an electrode; A tab connected to the electrode and extending from the electrode assembly; a cap assembly facing the electrode assembly and including the terminal, and A current collector assembly disposed between the electrode assembly and the cap assembly and electrically connected to the tab and the terminal, Wherein the current collector assembly comprises: A current collector plate including a first sub-plate including a first surface not bonded to the tab, and a second sub-plate extending from at least one side of the first sub-plate and including a first surface bonded to the tab, and A current collector is coupled to the second surface of the first sub-board and bonded to the terminal.
12. 12. The battery of claim 11, wherein the current collector and the first sub-board are assembled by a male-female fit.
13. 13. The battery of claim 12, wherein The current collector includes a coupling protrusion at one end portion of the current collector, and The first sub-board includes a coupling hole into which the coupling protrusion can be inserted and coupled.
14. 14. The battery of claim 13, wherein The current collector further includes a current collector body joined to the terminal through the other end portion of the current collector, and a flange between the current collector body and the coupling protrusion to be in face-to-face contact with the second surface of the first sub-board, and The current collector body, the flange, and the coupling protrusion are integrally formed.
15. 15. The battery of claim 14, wherein The current collector body has a cylindrical shape with a first diameter and a first height, and The flange has a cylindrical shape with a second diameter that is greater than the first diameter and a second height that is less than the first height.
16. 16. The battery of claim 15, wherein the current collector body is forged from round bar material.
17. 17. The battery according to claim 14 or 15, wherein the current collector and the first sub-board are joined by butt welding.
18. 18. The battery of claim 11, wherein the second sub-board is bent twice at a boundary with the first sub-board and protrudes away from the first surface of the first sub-board to define a plane parallel to the first sub-board.
19. 19. The battery of claim 11, wherein The tab includes an inner tab and an outer tab extending from the electrodes of the electrode assembly having the same polarity and spaced apart from each other, and The second sub-board includes an inner board bonded to the inner tab and an outer board bonded to the outer tab, wherein the inner board and the outer board extend from opposite sides of the first sub-board.
20. 20. A battery pack, comprising: A housing, and A plurality of batteries, accommodated in the housing, Wherein each of the plurality of batteries is a battery according to any one of claims 1 to 19.

Description

Battery and battery pack including the same Cross Reference to Related Applications The present application claims priority and rights of korean patent application No. 10-2024-0159719 filed on the korean intellectual property agency on 11/12 of 2024, the entire disclosure of which is incorporated herein by reference. Technical Field Aspects of embodiments of the present disclosure relate to a battery and a battery pack including the battery. Background Unlike a primary battery that cannot be recharged, a secondary battery is a type of battery that can be recharged and discharged. The low-capacity secondary battery is used for portable small-sized electronic devices such as smart phones, function phones, notebook computers, digital cameras, and video cameras, and the high-capacity secondary battery is widely used as a motor and a power storage battery for driving a hybrid car or an electric car. Such a secondary battery includes an electrode including a positive electrode and/or a negative electrode, an electrode assembly including the electrode, a case accommodating the electrode assembly, and an electrode terminal connected to the electrode assembly, etc. With the progress of technology, secondary batteries having high capacity are demanded. According to this, a plurality of secondary batteries can be electrically connected and used. For example, the secondary battery may be applied to the electronic device in the form of a battery module including a plurality of secondary batteries and/or a battery pack including a plurality of secondary battery modules. The secondary battery pack may also be configured of a plurality of secondary batteries. In this case, the electronic device is an electronic device that requires high power and/or high capacity, and includes, for example, an electric automobile and the like. Secondary batteries typically include an electrode assembly in which positive electrodes, separators, and negative electrodes are alternately arranged. The electrode assembly is accommodated inside the case. A plurality of positive and negative electrodes (herein referred to as "electrodes") constituting the electrode assembly are electrically connected to the outside through positive and negative electrode tabs (herein referred to as "electrode tabs"), respectively. That is, the plurality of positive electrode tabs and the plurality of negative electrode tabs are electrically connected to a positive electrode terminal and a negative electrode terminal (referred to herein as "electrode terminals"), respectively, mounted on the cap plate. In order to establish electrical connection between the plurality of electrode tabs and the electrode terminals, a connection assembly including one or more connection members is disposed between the plurality of electrode tabs and the electrode terminals. The connection assembly may electrically connect the plurality of electrode tabs to the electrode terminal by bonding a portion thereof to the plurality of electrode tabs and bonding another portion thereof to the electrode terminal. In the connection assembly, the connection member coupled to the plurality of electrode tabs and the connection member coupled to the electrode terminal may be different parts of a single structure, or may be separate structures coupled together. Such a connection assembly may be called a current collector assembly, which performs the function of collecting current supplied from a plurality of electrode tabs and transmitting the current to an electrode terminal. The shape and configuration of the current collector assembly may be variously implemented according to the type, internal structure, specification, etc. of the secondary battery. The above information disclosed in the background of the invention is provided for improving understanding of the background of the invention and thus may include information that does not constitute a related art. Disclosure of Invention According to an aspect of embodiments of the present invention, there is provided a battery including a current collector assembly having an improved structure and reduced manufacturing costs, and a battery pack including the battery. However, aspects and problems to be solved by the present invention are not limited to the above-described aspects and problems to be solved, and other aspects and problems not mentioned to be solved will be clearly understood by those skilled in the art from the following description. According to one or more embodiments of the present invention, a battery includes a case, an electrode assembly received in the case and including an electrode, a tab connected to the electrode and extending from the electrode assembly, a cap assembly facing the electrode assembly and including a terminal, and a current collector assembly disposed between the electrode assembly and the cap assembly and including a current collector plate coupled to the tab and a current collector coupled to the current co