Deactivation method and deactivation apparatus
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- KK TOYOTA CHUO KENKYUSHO
- Filing Date
- 2024-12-04
- Publication Date
- 2026-06-16
Smart Images
Figure 2026097520000005 
Figure 2026097520000006 
Figure 2026097520000007
Abstract
Claims
1. A deactivation step in which a nickel-metal hydride battery is deactivated by reacting a deactivating solution with the positive and / or negative electrodes of the nickel-metal hydride battery, After the deactivation step, the nickel-metal hydride battery is heat-treated to stabilize the Ni metal in a stabilization step, An inactivation method including the following.
2. The deactivation method according to claim 1, wherein the stabilization step involves heating the nickel-metal hydride battery at 40°C or higher.
3. The deactivation method according to claim 1, wherein the stabilization step involves heating the nickel-metal hydride battery at 60°C or higher.
4. The deactivation method according to claim 1 or 2, wherein the stabilization step involves heat-treating the nickel-metal hydride battery for a period of 0.5 hours or more and 12 hours or less.
5. The deactivation method according to claim 1 or 2, wherein the deactivating solution is a solution capable of a shuttle reaction in which a substance produced after removing H from Ni-MH inserts H into the positive electrode, and then H is removed again from the negative electrode.
6. The deactivation method according to claim 1 or 2, wherein the deactivating solution comprises a nitrate anion, a nitrite anion, and one or more of primary ammonium cations, secondary ammonium cations, tertiary ammonium cations, and quaternary ammonium cations.
7. The deactivation method according to claim 6, wherein the inactivating solution is an alkali cation with respect to nitrate anions and nitrite anions, and a sulfate anion and / or halogen with respect to ammonium cations.
8. The deactivation method according to claim 1 or 2, wherein the deactivating solution is alkaline.
9. An inactivation apparatus comprising a processing unit that performs an inactivation treatment to deactivate a nickel-metal hydride battery by reacting an inactivating solution with the positive and / or negative electrodes of the nickel-metal hydride battery, and after the inactivation treatment, performs a stabilization treatment by heat-treating the nickel-metal hydride battery to stabilize the Ni metal.