Energy storage system
An energy storage system includes at least one battery rack including at least two battery modules, a container in which the battery rack is received, an air conditioner including an outside heat exchanger configured to cool a heat exchanger medium having a temperature rise in the container, and a circulation path configured to allow the heat exchanger medium to circulate between the container and the outside heat exchanger, a fire extinguishing unit including a fire extinguishing agent tank configured to detect a temperature of the at least one battery module that is equal to or higher than a predetermined temperature or smoke that is generated in the at least one battery module and feed the fire extinguishing agent to the battery module, and an air conditioner management unit configured to spray the fire extinguishing agent in the fire extinguishing agent tank onto an outer surface of the outside heat exchanger.
1. An energy storage system, comprising:
at least one battery rack, the at least one battery rack including at least two battery modules;
a container in which the at least one battery rack is received;
an air conditioner including an outside heat exchanger configured to cool a heat exchanger medium, and a circulation path configured to allow the heat exchanger medium to circulate between the container and the outside heat exchanger;
a fire extinguisher including a fire extinguishing agent tank in which a fire extinguishing agent is stored, and configured to detect a temperature of the at least one battery module that is equal to or higher than a first predetermined temperature or smoke that is generated in the at least one battery module and feed the fire extinguishing agent to the at least two battery modules; and
an air conditioner manager configured to spray the fire extinguishing agent in the fire extinguishing agent tank onto an outer surface of the outside heat exchanger.
2. The energy storage system according to claim 1 , wherein the air conditioner manager includes a feed header having a plurality of nozzles arranged at a predetermined distance to uniformly spray the fire extinguishing agent onto the outer surface of the outside heat exchanger, and
wherein the outside heat exchanger includes a spiral pipe having ribs or a tube having a plurality of fins to allow the heat exchanger medium to move along an internal space, the ribs extending linearly along the spiral pipe outwardly from an outer surface of the spiral pipe.
3. The energy storage system according to claim 2 , wherein the air conditioner manager further includes:
a collection plate configured to collect the fire extinguishing agent sprayed onto the outside heat exchanger;
a return pipe configured to connect an outlet of the collection plate to an inlet of the fire extinguishing agent tank; and
a return pump configured to transfer the fire extinguishing agent collected in the collection plate to the fire extinguishing agent tank through the return pipe.
4. The energy storage system according to claim 3 , wherein the air conditioner manager further includes a filter disposed in the return pipe to remove contaminants in the collected fire extinguishing agent.
5. The energy storage system according to claim 2 , wherein the air conditioner manager further includes:
a feed pipe configured to connect an outlet of the fire extinguishing agent tank to an inlet of the feed header;
a feed pump configured to feed the fire extinguishing agent to the feed header through the feed pipe;
an active valve configured to open and close the feed pipe; and
a control unit configured to control the operation of the active valve and the feed pump.
6. The energy storage system according to claim 5 , wherein the air conditioner manager further includes:
a first temperature sensor configured to measure a temperature of the outside heat exchanger;
a second temperature sensor configured to measure a temperature of the fire extinguishing agent in the fire extinguishing agent tank; and
a heater configured to heat the fire extinguishing agent in the fire extinguishing agent tank.
7. The energy storage system according to claim 6 , wherein the control unit is configured to open the active valve to operate the feed pump when the temperature of the outside heat exchanger is equal to or higher than a second predetermined temperature or is equal to or lower than a third predetermined temperature.
8. The energy storage system according to claim 7 , wherein the control unit is configured to operate the heater to increase the temperature of the fire extinguishing agent in the fire extinguishing agent tank when the temperature of the fire extinguishing agent in the fire extinguishing agent tank is equal to or lower than a fourth predetermined temperature.
9. The energy storage system according to claim 1 , wherein the fire extinguishing agent tank further includes an antifreeze that is mixed with the fire extinguishing agent.
10. The energy storage system according to claim 1 , wherein the air conditioner manager further includes an auxiliary tank configured to store the fire extinguishing agent and replenish the fire extinguishing agent in the fire extinguishing agent tank when an amount of the fire extinguishing agent in the fire extinguishing agent tank is equal to or lower than a predetermined amount.