CN-122000501-A - Battery and battery pack including the same

Abstract

The invention discloses a battery and a battery pack. A battery includes a case, an electrode assembly received in the case and including an electrode, a tab member connected to and extending from the electrode assembly, a cap assembly facing the electrode assembly and including a terminal, a connection member disposed between the electrode assembly and the cap assembly and connected to the terminal and the tab member, and an electrode protection member disposed between the connection member and the electrode assembly.

Inventors

• DING YANHU
• LIN XIANYING

Assignees

• 三星SDI株式会社

Dates

Publication Date

20260508

Application Date

20250930

Priority Date

20241107

Claims (18)

1. 1. A battery, comprising: A housing; an electrode assembly accommodated in the case and including an electrode; A tab member connected to the electrode and extending from the electrode assembly; A cap assembly facing the electrode assembly and including a terminal; A connection member disposed between the electrode assembly and the cap assembly and connected to the terminal and the tab member, and An electrode protection member disposed between the connection member and the electrode assembly.
2. 2. The battery of claim 1, wherein the electrode protection member comprises a material configured to block welding energy.
3. 3. The battery of claim 2, wherein The welding energy is a laser beam, and The electrode protection member includes a plastic material.
4. 4. The battery according to claim 2, wherein the electrode protection member is coupled to the connection member.
5. 5. The battery according to claim 4, wherein the electrode protection member includes a fastening portion coupled to the connection member.
6. 6. The battery of claim 5, wherein The fastening portion includes a coupling hook, and The connection member includes an opening in which the coupling hook is inserted and coupled.
7. 7. The battery according to claim 4, wherein the electrode protection member includes: a blocking member coupled to the connecting member and configured to block the welding energy, and And a heat dissipation layer disposed on at least one surface of the blocking member.
8. 8. The battery of claim 7, wherein the heat dissipation layer comprises a thermal interface material.
9. 9. The battery of claim 8, wherein the thermal interface material comprises any one of silicone, epoxy, and polyimide.
10. 10. A battery, comprising: A housing having a rectangular parallelepiped shape with an opening; an electrode assembly accommodated in the case and including an electrode; A tab member connected to the electrode and extending from the electrode assembly; A cap assembly having a plate shape including terminals and disposed in the opening to face the electrode assembly; A connection member disposed between the electrode assembly and the cap assembly and including a first portion joined to the terminal by welding and a second portion different from the first portion and connected to the tab member, and An electrode protection member disposed under the first portion and between the connection member and the electrode assembly.
11. 11. The battery of claim 10, wherein the electrode protection member comprises a material configured to block welding energy applied during welding of the first portion.
12. 12. The battery of claim 11, wherein The welding energy is a laser beam, and The electrode protection member includes a plastic material.
13. 13. The battery according to claim 11, wherein the electrode protection member includes: a blocking member coupled to the connecting member and configured to block the welding energy, and And a heat dissipation layer disposed on at least one surface of the blocking member.
14. 14. The battery of claim 13, wherein the blocking member includes a protection portion corresponding to a position of the first portion and a fastening portion coupled to the connection member.
15. 15. The battery of claim 14, wherein The fastening portion includes a coupling hook, and The connection member includes an opening in the second portion, and the coupling hook is inserted and coupled in the opening.
16. 16. The battery of claim 13, wherein the heat dissipation layer comprises a thermal interface material.
17. 17. The battery of claim 16, wherein the thermal interface material comprises any one of silicone, epoxy, and polyimide.
18. 18. 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 17.

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. 10-2024-0156905 filed on the korean intellectual property office at 11/7 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, for example, 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. And thus 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. According to an embodiment, the secondary battery pack may also be configured of a plurality of secondary batteries. In this case, the electronic device is an electronic device requiring high power and/or high capacity, and may include, for example, an electric automobile or 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. In this case, the positive electrode tab and the negative electrode tab are electrically connected to a positive electrode terminal and a negative electrode terminal (referred to herein as "electrode terminals") mounted on the cap plate, respectively, and one or more connection members may be provided between the electrode tab and the electrode terminal. Typically, the electrode terminals may be physically connected to the connection member using a metal-to-metal connection method such as welding. For this purpose, welding is performed between the electrode terminals and the connection members connected to the electrode assembly while the electrode assembly is inserted into the case. Welding processes such as thermal welding and laser welding are widely used. However, due to the nature of the welding process using a high energy heat source or a laser light source, surrounding components, particularly the electrode assembly, are easily damaged during the welding process. 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 and a battery pack including the same, in which damage to an electrode assembly during welding of an electrode terminal and a connection member is prevented or substantially prevented. 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 member connected to the electrode and extending from the electrode assembly, a cap assembly facing the electrode assembly and including a terminal, a connection member disposed between the electrode assembly and the cap assembly and connected to the terminal and the tab member, and an electrode protection member disposed between the connection member and the electrode assembly. According to one or more embodiments, the electrode protection member may include a material configured to block welding energy. In an embodiment, the welding energy may be a laser beam and the electrode protection member may comprise a plastic material. According to one or more embodiments, the electrode protection me