Liquid detection sensor
The present disclosure provides a liquid detection sensor which has the general purpose usability and can prevent the deterioration of a metal-air battery being an electric power source even when being installed for a long term, and in which the metal-air battery being an electric power source can exhibit an excellent electric power generation performance. The liquid detection sensor has the metal-air battery having a positive electrode, a negative electrode, and an electrolytic solution-forming component positioned between the positive electrode and the negative electrode, wherein the electrolytic solution-forming component is enclosed in the inside of a resin-made bag; and a resin of the resin-made bag has dissolvability or dispersibility in a liquid being an object to be detected.
1 . A liquid detection sensor, comprising a metal-air battery having:
a positive electrode,
a negative electrode,
a support member having voids and supporting the positive electrode and the negative electrode, wherein the support member is arranged between the positive electrode and the negative electrode,
a plurality of resin-made bags, wherein each resin-made bag is introduced into an associated void of the support member, and a resin of each resin-made bag has dissolvability or dispersibility in a liquid being an object to be detected, and
a plurality of electrolytic solution-forming components, wherein each electrolytic solution-forming component is enclosed in the inside of an associated resin-made bag of the plurality of resin-made bags,
wherein each resin-made bag comprises:
an oil-soluble resin, or
a water-soluble resin composite comprising a polyvinyl alcohol-based polymer with at least one resin selected from a group of resins consisting of a polysaccharide and an acrylic resin.
2 . The liquid detection sensor according to claim 1 , wherein each resin-made bag is disposed between the positive electrode and the negative electrode.
3 . The liquid detection sensor according to claim 1 , wherein each electrolytic solution-forming component comprises water, an alkaline metal salt, or an aqueous solution of an alkaline metal salt.
4 . The liquid detection sensor according to claim 1 , wherein an active material of the negative electrode comprises at least one metal selected from the group consisting of magnesium (Mg), aluminum (Al), lithium (Li), calcium (Ca), and zinc (Zn).
5 . The liquid detection sensor according to claim 1 , having a notifying unit that receives electric power of the metal-air battery and notifies detection of a liquid.
6 . The liquid detection sensor according to claim 1 , having a notifying unit capable of wireless signal transmission of a detection signal of the metal-air battery to a signal receiving unit.
7 . The liquid detection sensor according to claim 1 , wherein the liquid detection sensor is a water detection sensor.
8 . The liquid detection sensor according to claim 1 , wherein the liquid detection sensor is an oil detection sensor.
9 . The liquid detection sensor according to claim 1 , wherein each resin-made bag comprises the water-soluble resin composite.
10 . The liquid detection sensor according to claim 1 , wherein each resin-made bag comprises the oil-soluble resin.
11 . The liquid detection sensor according to claim 1 , wherein each electrolytic solution-forming component enclosed in the inside of an associated resin-made bag comprises an alkaline metal salt or an aqueous solution of an alkaline metal salt.
12 . The liquid detection sensor according to claim 1 , wherein each resin-made bag comprises the water-soluble resin composite, which comprises a first layer including the polyvinyl alcohol-based polymer, and a second layer including the polysaccharide and/or acrylic resin.