Method of manufacturing secondary battery
View Patent ↗Disclosed is a method of manufacturing a secondary battery, built in a battery case, having an electrode assembly impregnated with an electrolyte solution, the method including: (a) injecting an electrolyte solution as a target into a chamber equipped with a vibrating probe; (b) impregnating by soaking an electrode assembly, which has a separator interposed between a cathode and an anode, in an electrolyte solution contained in the chamber; (c) applying vibration at a frequency of 20 to 100 kHz of to the electrolyte solution with the vibrating probe; and (d) moving the electrode assembly with the electrolyte solution into a battery case, whereby interfacial wetting of the electrode assembly and the electrolyte solution is improved. A secondary battery manufactured according to the method may have improved electrolyte solution impregnation properties, ionic conductivity, electronic conductivity and the like and, as such, may have improved electrochemical performance.
1. A method of manufacturing a secondary battery, built in a battery case, having an electrode assembly impregnated with an electrolyte solution, the method comprising:
injecting an electrolyte solution as a target into a chamber equipped with a vibrating probe;
impregnating by soaking an electrode assembly, which has a separator interposed between a cathode and an anode, in the injected electrolyte solution contained in the chamber;
after injecting the electrolyte solution into the chamber and soaking the electrode assembly in the injected electrolyte solution contained in the chamber, applying vibration with the vibrating probe at a frequency of 20 to 100 kHz to the electrolyte solution already injected into the chamber; and
moving the electrode assembly with the electrolyte solution into a battery case,
whereby interfacial wetting of the electrode assembly and the electrolyte solution is improved.
2. The method according to claim 1 , wherein, in the impregnating, the vibration has an amplitude of 2 to 30 μm.
3. The method according to claim 1 , wherein the vibration is applied once, or periodically or aperiodically twice or more.
4. The method according to claim 1 , wherein the vibrating probe is installed in the chamber in a state of directly contacting the target.
5. The method according to claim 1 , wherein the vibrating probe is installed in the chamber in a state of being spaced from the target.
6. The method according to claim 5 , wherein a distance between the vibrating probe and the target is 1 to 10 cm.
7. The method according to claim 5 , wherein a non-aqueous gel is interposed between the vibrating probe and the target.
8. The method according to claim 7 , wherein the non-aqueous gel is composed of silicone oil.
9. The method according to claim 1 , wherein the electrolyte solution has a viscosity of 0.1 cP or more and 5 cP or less.
10. The method according to claim 1 , wherein the electrolyte solution has a viscosity of 1 cP or more and 4 cP or less.
11. A secondary battery manufactured using the method according to claim 1 .
12. The secondary battery according to claim 11 , wherein an impregnation amount of an electrolyte solution of the electrode assembly located in the secondary battery is 120% to 140% of an impregnation amount of an electrode assembly to which vibration is not applied.
13. The secondary battery according to claim 11 , wherein the secondary battery is a lithium secondary battery.
14. A method of manufacturing a secondary battery, built in a battery case, having an electrode assembly impregnated with an electrolyte solution, the method comprising:
injecting an electrolyte solution as a target into a chamber equipped with a vibrating probe, wherein the vibrating probe is installed in the chamber in a state of directly contacting the injected electrolyte solution;
impregnating by soaking an electrode assembly, which has a separator interposed between a cathode and an anode, in an electrolyte solution contained in the chamber;
applying vibration at a frequency of 20 to 100 kHz to the electrolyte solution with the vibrating probe; and
moving the electrode assembly with the electrolyte solution into a battery case,
whereby interfacial wetting of the electrode assembly and the electrolyte solution is improved.
15. A method of manufacturing a secondary battery, built in a battery case, having an electrode assembly impregnated with an electrolyte solution, the method comprising:
injecting an electrolyte solution as a target into a chamber equipped with a vibrating probe, wherein the vibrating probe is installed in the chamber in a state of being spaced from the injected electrolyte solution;
impregnating by soaking an electrode assembly, which has a separator interposed between a cathode and an anode, in an electrolyte solution contained in the chamber;
applying vibration at a frequency of 20 to 100 kHz to the electrolyte solution with the vibrating probe; and
moving the electrode assembly with the electrolyte solution into a battery case,
whereby interfacial wetting of the electrode assembly and the electrolyte solution is improved.
16. The method according to claim 15 , wherein a distance between the vibrating probe and the target is 1 to 10 cm.
17. The method according to claim 15 , wherein a non-aqueous gel is interposed between the vibrating probe and the target.
18. The method according to claim 17 , wherein the non-aqueous gel is composed of silicone oil.