KR-20260063372-A - SECONDARY BATTERY AND METHOD FOR MANUFACTURING THE SAME

Abstract

The present disclosure provides a secondary battery. The secondary battery comprises an electrode assembly including a first electrode plate having a first polarity, a separator, and a second electrode plate having a second polarity different from the first polarity, and a case housing the electrode assembly. The case comprises a body frame with two opposing sides open, a first plate coupled to the end of the first open side of the body frame, and a second plate coupled to the end of the second open side of the body frame opposite the first side.

Inventors

• 허응국

Assignees

• 삼성에스디아이 주식회사

Dates

Publication Date

20260507

Application Date

20241030

Claims (20)

1. An electrode assembly comprising a first electrode plate having a first polarity, a separator, and a second electrode plate having a second polarity different from the first polarity; and A case accommodating the above electrode assembly Includes, The above case is, A body frame with open sides facing each other; A first plate coupled to the end of the open first side of the body frame; and A second plate coupled to the end of the open second side of the body frame facing the first side. A secondary battery including
2. In paragraph 1, A secondary battery in which the planar shape of the first plate corresponds to the planar shape of the electrode assembly.
3. In paragraph 1, A secondary battery in which the planar shape of the above body frame corresponds to the planar shape of the above electrode assembly.
4. In paragraph 1, The end of the first side and the outermost region of the first plate are welded together, and A secondary battery in which the end of the second side and the outermost region of the second plate are welded together.
5. In paragraph 1, A secondary battery in which the thickness of the body frame is greater than the thickness of at least one of the first plate or the second plate.
6. In paragraph 1, A secondary battery in which the thickness of the first plate is different from the thickness of the second plate.
7. In paragraph 1, A secondary battery in which at least one of the first plate, the second plate, or the body frame comprises an alloy material.
8. In paragraph 1, A secondary battery in which the material of the first plate is different from the material of the body frame.
9. In paragraph 1, A secondary battery in which the material of the first plate is different from the material of the second plate.
10. In paragraph 1, An electrode terminal electrically connected to the first electrode plate or the second electrode plate and disposed on the third side of the body frame. Includes more, The above third aspect is a secondary battery that is different from the above first aspect and the above second aspect.
11. A body frame having a planar shape corresponding to the planar shape of the electrode assembly, with both opposing sides open; A first plate coupled to the end of the open first side of the body frame; and A second plate coupled to the end of the open second side of the body frame facing the first side. A case of a secondary battery including
12. In Paragraph 11, The end of the first side and the outermost region of the first plate are welded together, and A case of a secondary battery in which the end of the second side and the outermost region of the second plate are welded together.
13. In Paragraph 11, A case of a secondary battery, wherein the thickness of the body frame is greater than the thickness of at least one of the first plate or the second plate.
14. In Paragraph 11, A secondary battery in which at least one of the first plate, the second plate, or the body frame comprises an alloy material.
15. A step of preparing a body frame having a planar shape corresponding to the planar shape of the electrode assembly and having both sides open; A step of attaching a first plate to the end of the open first side of the body frame; A step of accommodating the electrode assembly in the first plate and body frame combined above; and A step of attaching a second plate to the end of the open second side of the body frame facing the first side. A method for manufacturing a secondary battery, comprising
16. In paragraph 15, The step of joining the first plate is, Step of welding the end of the first side and the outermost region of the first plate. A method for manufacturing a secondary battery, comprising
17. In paragraph 15, The step of joining the second plate is, Step of welding the end of the second side and the outermost region of the second plate. A method for manufacturing a secondary battery, comprising
18. In paragraph 15, The electrode assembly comprises a first electrode plate having a first polarity, a separator, and a second electrode plate having a second polarity different from the first polarity. The above method is, A step of placing an electrode terminal on the third side of the body frame; and A step of electrically connecting the electrode terminal and the first electrode plate or the second electrode plate. Includes more, A method for manufacturing a secondary battery, wherein the third aspect is different from the first aspect and the second aspect.
19. In paragraph 15, A method for manufacturing a secondary battery, wherein the planar shape of the first plate or the second plate corresponds to the planar shape of the electrode assembly.
20. In paragraph 15, A method for manufacturing a secondary battery, wherein the thickness of the body frame is greater than the thickness of at least one of the first plate or the second plate.

Description

Secondary Battery and Method for Manufacturing the Same The present disclosure relates to a secondary battery and a method for manufacturing a secondary battery. Unlike primary batteries, which cannot be recharged, secondary batteries are batteries capable of both charging and discharging. Low-capacity secondary batteries are used in small portable electronic devices such as smartphones, feature phones, laptop computers, digital cameras, and camcorders, while high-capacity secondary batteries are widely used as power sources for motor drive systems and power storage batteries in hybrid and electric vehicles. Such secondary batteries include an electrode assembly consisting of a positive electrode and a negative electrode, a case housing the assembly, and electrode terminals connected to the electrode assembly. Conventional prismatic secondary batteries are manufactured by housing an electrode assembly in a case body with one side open, and then attaching a case cover (or cap plate) to the open side. This case body is manufactured into a standard shape by pressing metal. Consequently, conventional prismatic secondary batteries have a problem in that the planar shape of the case is fixed, making it impossible to accommodate amorphous electrode assemblies that differ from the planar shape of the case. The information described above disclosed in the background technology of this invention is intended only to enhance understanding of the background of the present invention and may therefore include information that does not constitute prior art. The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention provided below; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings. FIG. 1 is an exploded perspective view showing an example of a secondary battery according to one embodiment of the present disclosure. FIG. 2 is an exploded perspective view showing an example of the thickness of a case according to one embodiment of the present disclosure. FIG. 3 is a drawing showing an example of a case for a secondary battery according to one embodiment of the present disclosure. FIG. 4 is a drawing showing an example of a case for a secondary battery according to one embodiment of the present disclosure. FIG. 5 is a flowchart illustrating an example of a secondary battery manufacturing method according to one embodiment of the present disclosure. FIG. 6 is a drawing showing an example in which a body frame and a first plate are combined according to one embodiment of the present disclosure. FIG. 7 is a drawing showing an example in which an electrode assembly is accommodated in a case according to one embodiment of the present disclosure. FIG. 8 is a drawing showing an example in which a body frame and a second plate are combined according to one embodiment of the present disclosure. FIG. 9 is a drawing showing an example of a welded area according to one embodiment of the present disclosure. Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings. Instead, based on the principle that the inventor can appropriately define the concepts of terms to best describe their invention, they should be interpreted in a meaning and concept consistent with the technical spirit of the present invention. Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely some of the most preferred embodiments of the present invention and do not represent all of the technical spirit of the present invention. It should be understood that various equivalents and modifications capable of replacing them may exist at the time of filing this application. Additionally, to aid in understanding the invention, the attached drawings are not drawn to actual scale, and the dimensions of some components may be exaggerated. Furthermore, the same reference numerals may be assigned to identical components in different embodiments. Additionally, as used herein, “comprise, include” and/or “comprising, including” specify the presence of the mentioned features, numbers, steps, actions, parts, elements, and/or groups thereof, and do not exclude the presence or addition of one or more other features, numbers, actions, parts, elements, and/or groups. Additionally, to aid in understanding the invention, the attached drawings are not drawn to actual scale, and the dimensions of some components may be exaggerated. Furthermore, the same reference numerals may be assigned to identical components in different embodiments. The stateme