Energy storage device, method for storing and supplying energy using the same

An energy storage device, comprising:

• a phase-change energy storage tank, the phase-change energy storage tank comprising a first housing and a second housing disposed in the first housing;
• the second housing comprising a liquid inlet, a liquid outlet, a feeding hole, and a discharge hole;
• the first housing comprising a thermal insulation material, and the second housing comprising a phase change material;
• the liquid inlet and the liquid outlet being disposed on two ends of the second housing, respectively;
• the phase change material being introduced to and being discharged out of the second housing via the feeding hole and the discharge hole, respectively;
• a first liquid inlet pipe;
• a first liquid outlet pipe;
• a second liquid inlet pipe;
• a second liquid outlet pipe;
• and
• a pipeline;
• wherein:
• the first liquid inlet pipe, the phase-change energy storage tank, and the first liquid outlet pipe are connected to each other sequentially to form an energy storage unit;
• the first liquid inlet pipe is provided with a first electric valve;
• the first liquid outlet pipe is provided with a second electric valve, a first intelligent temperature control sensor, and a circulating water pump;
• the first liquid inlet pipe is connected to the liquid inlet of the phase-change energy storage tank to supply cold/hot water to the phase-change energy storage tank, and the first liquid outlet pipe is connected to the liquid outlet of the phase-change energy storage tank to receive cold/hot water flowing out of the phase-change energy storage tank;
• the first intelligent temperature control sensor is configured to control the switch on/off of the first electric valve and the second electric valve;
• the second liquid inlet pipe, the phase-change energy storage tank, and the second liquid outlet pipe are connected to each other sequentially to form an energy supply unit;
• the second liquid inlet pipe is provided with a third electric valve, and the second liquid outlet pipe is provided with a fourth electric valve;
• the second liquid inlet pipe is connected to the liquid inlet of the phase-change energy storage tank;
• the second liquid outlet pipe is connected to the liquid outlet of the phase-change energy storage tank;
• and
• the pipeline is disposed between the second liquid inlet pipe and the second liquid outlet pipe;
• the third electric valve and the fourth electric valve are disposed between the pipeline and the phase-change energy storage tank;
• the pipeline is provided with a second intelligent temperature control sensor and a fifth electric valve;
• the second intelligent temperature control sensor is configured to control the switch on/off of the third electric valve, the fourth electric valve, and the fifth electric valve.