Wearable device having flexible battery

A wearable device having a flexible battery, the wearable device comprising:

• a functional unit;
• a band unit that fixes the functional unit to a wrist of a user;
• and
• a thin plate flexible battery that is embedded in the band unit and supplies power to the functional unit,
• wherein the thin plate flexible battery comprises:
• an electrode assembly;
• an electrolyte;
• and a packaging member that seals the electrode assembly and the electrolyte, and wherein the packaging member is configured by sequentially laminating a heat-sealable layer and a protective layer outwardly from an inner side of the packaging member,
• wherein the electrode assembly comprises:
• a positive electrode including a first porous nanofiber web having a plurality of first pores, the first porous nanofiber web being formed of first nanofibers which are made of electrospun and accumulated polymer material, first metal particles coated on the first nanofibers to form the first nanofibers as a first conductive support, a positive electrode active material slurry injected into the plurality of first pores, a first conductive adhesive layer formed on the first porous nanofiber web, and a first conductive metal layer formed on the first conductive adhesive layer;
• a negative electrode including a second porous nanofiber web having a plurality of second pores, the second porous nanofiber web being formed of second nanofibers which are made of electrospun and accumulated polymer material, second metal particles coated on the second nanofibers to form the second nanofibers as a second conductive support, a negative electrode active material slurry injected into the plurality of second pores, a second conductive adhesive layer formed on the second porous nanofiber web, and a second conductive metal layer formed on the second conductive adhesive layer;
• and
• a porous separator for separating the positive electrode and the negative electrode,
• wherein the first nanofibers and the second nanofibers have a diameter of 0.3 to 1.5 μm, and the first porous nanofiber web and the second porous nanofiber web have a thickness of 5 to 1000 μm, and
• wherein the separator comprises:
• a porous nonwoven fabric playing a role of a support;
• and
• a porous polymer web layer or a non-pore polymer film layer that is laminated on one side of the porous nonwoven fabric and playing a role of an adhesive layer and an ion moisture-containing layer when the porous polymer web layer or the non-pore polymer film layer is in close contact with the positive electrode or the negative electrode facing the porous polymer web layer or the non-pore polymer film layer.