CN-122000604-A - Secondary battery

Abstract

A secondary battery includes an electrode assembly, a case accommodating the electrode assembly, the case having an open side, a cap plate coupled to the open side of the case, the cap plate having a vent hole, an insulating frame coupled to the cap plate, the insulating frame being between the cap plate and the electrode assembly, and a vent coupled to the insulating frame, the vent configured to seal the vent hole.

Inventors

• YU XIANGXUN

Assignees

• 三星SDI株式会社

Dates

Publication Date

20260508

Application Date

20251028

Priority Date

20241107

Claims (20)

1. 1. A secondary battery, comprising: An electrode assembly; a case accommodating the electrode assembly, the case having an open side; a cover coupled with the open side of the housing, the cover having an exhaust hole; an insulating frame coupled with the cap plate, the insulating frame between the cap plate and the electrode assembly, and And a vent coupled with the insulating frame, the vent configured to seal the vent hole.
2. 2. The secondary battery according to claim 1, wherein the exhaust portion includes: An elastic member coupled with the insulating frame; A pad coupled with the elastic member, and A plug on the pad.
3. 3. The secondary battery according to claim 2, wherein an elastic coefficient of the elastic member is determined based on a size of the case.
4. 4. The secondary battery according to claim 2, wherein the elastic member is coupled to the insulating frame by welding.
5. 5. The secondary battery according to claim 2, wherein the gasket comprises: a first surface in contact with the plug, and A second surface in contact with the elastic member, Wherein the area of the first surface is larger than the area of the second surface.
6. 6. The secondary battery according to any one of claims 2 to 5, wherein the elastic member and the plug each include a corrosion-resistant material.
7. 7. The secondary battery according to claim 6, wherein the corrosion-resistant material comprises at least one of aluminum, an aluminum alloy, and stainless steel.
8. 8. The secondary battery according to any one of claims 2 to 5, wherein the gasket comprises a material having elastic force.
9. 9. The secondary battery according to claim 8, wherein the material having elastic force includes at least one of silicon and silicon rubber.
10. 10. The secondary battery according to any one of claims 1 to 5, wherein the vent hole has any one of a circular shape, an elliptical shape, and a polygonal shape.
11. 11. A secondary battery, comprising: An electrode assembly; a case accommodating the electrode assembly, the case having an open side; a cover coupled with the open side of the housing, the cover having an exhaust hole; an insulating frame coupled with the cap plate, the insulating frame between the cap plate and the electrode assembly, and An exhaust portion configured to seal the exhaust hole, wherein the exhaust portion includes: An elastic member coupled with the insulating frame; A pad coupled with the elastic member; A protrusion portion protruding on the pad, and A plug on the protruding portion.
12. 12. The secondary battery according to claim 11, wherein an elastic coefficient of the elastic member is determined based on a size of the case.
13. 13. The secondary battery according to claim 11, wherein the elastic member is welded to the insulating frame.
14. 14. The secondary battery according to claim 11, wherein the gasket and the protruding portion are integral with each other.
15. 15. The secondary battery according to claim 11 to 14, wherein the elastic member and the plug each include a corrosion-resistant material.
16. 16. The secondary battery according to claim 15, wherein the corrosion-resistant material comprises at least one of aluminum, an aluminum alloy, and stainless steel.
17. 17. The secondary battery according to claim 11 to 14, wherein the gasket comprises a material having elastic force.
18. 18. The secondary battery according to claim 17, wherein the material having elastic force comprises at least one of silicon and silicon rubber.
19. 19. The secondary battery according to any one of claims 11 to 14, wherein the vent hole has any one of a circular shape, an elliptical shape, and a polygonal shape.
20. 20. The secondary battery according to claim 11 to 14, wherein a cross-sectional area of the plug is larger than a cross-sectional area of the gasket.

Description

Secondary battery Technical Field The present disclosure relates to a secondary battery. Background Unlike primary batteries, which are not designed to be (re) charged, secondary (or rechargeable) batteries are batteries that are designed to be discharged and re-charged. Low-capacity secondary batteries are used for portable small-sized electronic devices such as smart phones, function phones, notebook computers, digital cameras, and video cameras, and large-capacity secondary batteries are widely used as power sources for driving motors in hybrid vehicles and electric vehicles and for storing electric power (e.g., electric power storage at home and/or utility scale). The secondary battery generally includes an electrode assembly including a positive electrode and a negative electrode, a case accommodating the electrode assembly, and an electrode terminal connected to the electrode assembly. Lithium ion secondary batteries have been widely used as one type of secondary batteries. When a lithium ion secondary battery is exposed to a high temperature environment for a long period of time or continuously charged or discharged with a high current, internal gas may be generated due to degradation of a monomer or the like. When the internal pressure of the case increases due to the internal gas, a fire or explosion may occur. The above information disclosed in this background section is for enhancement of understanding of the background of the present disclosure and, therefore, it may contain information that does not form a related (or prior) art. Disclosure of Invention Embodiments include a secondary battery including an electrode assembly, a case accommodating the electrode assembly, the case having an open side, a cap plate coupled with the open side of the case, the cap plate having a vent hole, an insulating frame coupled with the cap plate, the insulating frame being between the cap plate and the electrode assembly, and a vent coupled with the insulating frame, the vent configured to seal the vent hole. The exhaust part may include an elastic member coupled with the insulating frame, a gasket coupled with the elastic member, and a plug on the gasket. The elastic coefficient of the elastic member may be determined based on the size of the housing. The elastic member may be coupled to the insulating frame by welding. The gasket may include a first surface in contact with the plug and a second surface in contact with the elastic member, wherein the first surface may have an area greater than an area of the second surface. The resilient member and the plug may each comprise a corrosion resistant material. The corrosion resistant material may include at least one of aluminum, aluminum alloy, and stainless steel. The pad may comprise a material having a resilient force. The material having elastic force may include at least one of silicon and silicon rubber. The vent hole may have any one of a circular shape, an elliptical shape, and a polygonal shape. Embodiments include a secondary battery including an electrode assembly, a case accommodating the electrode assembly, the case having an open side, a cap plate coupled to the open side of the case, the cap plate having a vent hole, an insulating frame coupled to the cap plate, the insulating frame being between the cap plate and the electrode assembly, and a vent portion configured to seal the vent hole, wherein the vent portion includes an elastic member coupled to the insulating frame, a gasket coupled to the elastic member, a protrusion portion protruding on the gasket, and a plug on the protrusion portion. The elastic coefficient of the elastic member may be determined based on the size of the housing. The elastic member may be welded to the insulating frame. The pad and the protruding portion may be integral with each other. The resilient member and the plug may each comprise a corrosion resistant material. The corrosion resistant material may include at least one of aluminum, aluminum alloy, and stainless steel. The pad may comprise a material having a resilient force. The material having elastic force may include at least one of silicon and silicon rubber. The vent hole may have any one of a circular shape, an elliptical shape, and a polygonal shape. The cross-sectional area of the plug may be greater than the cross-sectional area of the pad. These and other aspects and features of the present disclosure will be described in, or be apparent from, the following description of the embodiments of the present disclosure. However, the aspects and features of the present disclosure are not limited to those described above, and other aspects and features not mentioned will be clearly understood by those skilled in the art from the detailed description of the following description. Drawings The accompanying drawings, which are included to provide an illustration of embodiments of the disclosure, and together with a detailed description of the disclosure, further d