CN-224204287-U - Energy storage system and power utilization system

CN224204287UCN 224204287 UCN224204287 UCN 224204287UCN-224204287-U

Abstract

The application provides an energy storage system and an electricity utilization system, and relates to the technical field of energy storage. The energy storage system comprises a battery, a smoke discharging assembly and a negative pressure preventing device. The battery has a pressure relief mechanism configured to release emissions from the battery when a temperature or pressure within the battery reaches a first threshold, a smoke evacuation assembly coupled to the pressure relief mechanism to release the emissions into the smoke evacuation assembly, and a negative pressure prevention device disposed in the smoke evacuation assembly and configured to open to allow air into the smoke evacuation assembly when the pressure within the smoke evacuation assembly is below a second threshold. By arranging the negative pressure prevention device and configuring the negative pressure prevention device to be opened when the pressure in the smoke exhaust assembly is lower than the second threshold value, air can enter the smoke exhaust assembly, and therefore the pressure in the smoke exhaust assembly is regulated, and negative pressure is not easy to form. This makes the release mechanism of the battery that does not take place thermal runaway be difficult to warp or open the valve in advance, helps prolonging the life of energy storage system.

Inventors

CHEN HAO
GONG MUHONG
FENG CHAOJUN
ZHANG HAN
Gui ke

Assignees

武汉亿纬储能有限公司

Dates

Publication Date: 20260505
Application Date: 20250331

Claims (13)

1. An energy storage system, comprising: A battery having a pressure relief mechanism configured to vent emissions within the battery when a temperature or pressure within the battery reaches a first threshold; The pressure release mechanism is connected with the smoke exhaust assembly so as to release the emissions into the smoke exhaust assembly; And the negative pressure prevention device is arranged in the smoke exhaust assembly and is configured to be opened when the pressure in the smoke exhaust assembly is lower than a second threshold value so that air enters the smoke exhaust assembly, and the second threshold value is smaller than the first threshold value.
2. The energy storage system of claim 1, wherein the smoke evacuation assembly comprises a smoke evacuation main and a plurality of smoke evacuation branch pipes connected in parallel to the smoke evacuation main; The energy storage system comprises a plurality of battery clusters, the battery clusters are distributed along the width direction of the energy storage system, each battery cluster comprises a plurality of batteries distributed along the height direction of the energy storage system, each battery cluster corresponds to each smoke exhaust branch pipe, the smoke exhaust branch pipe is connected with the corresponding pressure release mechanism of the batteries in the battery clusters, and at least one smoke exhaust branch pipe is provided with the negative pressure prevention device.
3. The energy storage system of claim 2, wherein a plurality of negative pressure prevention devices are provided, each negative pressure prevention device corresponding to each of the fume exhaust branch pipes.
4. The energy storage system of claim 2, wherein the negative pressure prevention device and the main smoke exhaust pipe are disposed at two ends of the branch smoke exhaust pipe, respectively.
5. The energy storage system of claim 4, wherein the fume exhaust branch pipe extends along the height direction of the energy storage system, the negative pressure prevention device is arranged at the bottom of the fume exhaust branch pipe, and the fume exhaust main pipe is arranged at the top of the battery cluster and is communicated with the top of the fume exhaust branch pipe.
6. The energy storage system according to claim 2, wherein a connecting pipe is arranged on a side of the smoke exhaust branch pipe facing the battery cluster, and the connecting pipe is sleeved on the pressure release mechanism.
7. The energy storage system of any of claims 2-6, wherein the smoke evacuation assembly further comprises a transition tube in communication with the main smoke evacuation tube, the transition tube being located between the main smoke evacuation tube and an outlet of the smoke evacuation assembly in the flow direction of the emissions.
8. The energy storage system of claim 7, further comprising: and the fireproof brake is arranged on the switching tube and is configured to control the switching tube to be turned on/off.
9. The energy storage system of claim 8, further comprising: And an exhaust device disposed downstream of the fire damper in a flow direction of the exhaust, and configured to direct the exhaust in the transfer tube to an outlet of the smoke evacuation assembly.
10. The energy storage system of claim 8, further comprising: And a controller in signal communication with the fire damper and configured to control the fire damper to open when the concentration of combustible gas within the smoke evacuation assembly is above a third threshold.
11. The energy storage system of claim 10, further comprising: And a combustible gas detector in signal connection with the controller and configured to detect whether the concentration of the combustible gas in the smoke exhaust assembly is higher than the third threshold.
12. The energy storage system of claim 7, wherein the smoke evacuation assembly further comprises: a check valve disposed between the adapter tube and the outlet of the smoke evacuation assembly along the flow direction of the exhaust, and configured for unidirectional flow of the exhaust from the adapter tube to the outlet of the smoke evacuation assembly.
13. An electrical power system comprising the energy storage system of any one of claims 1-12, the energy storage system being configured to power the electrical power system.

Description

Energy storage system and power utilization system Technical Field The application relates to the technical field of energy storage, in particular to an energy storage system and an electricity utilization system. Background In energy storage systems, a smoke evacuation line is typically provided in connection with a pressure relief mechanism of the battery in order to vent and discharge the exhaust inside the battery into the smoke evacuation line in the event of thermal runaway of the battery. At present, a negative pressure phenomenon exists in a smoke exhaust pipeline, and the phenomenon causes the deformation of a pressure release mechanism of a battery which is not in thermal runaway, even a valve is opened in advance, so that the service life of an energy storage system is reduced. Disclosure of utility model The embodiment of the application provides an energy storage system and an electric system, which are used for solving the problem that the service life of the energy storage system is reduced due to deformation of a pressure release mechanism of a battery or early valve opening. In a first aspect, embodiments of the present application provide an energy storage system comprising a battery having a pressure relief mechanism configured to release emissions within the battery when a temperature or pressure within the battery reaches a first threshold, a smoke evacuation assembly connected to the smoke evacuation assembly to release the emissions into the smoke evacuation assembly, and a negative pressure prevention device disposed on the smoke evacuation assembly and configured to open to admit air into the smoke evacuation assembly when a pressure within the smoke evacuation assembly is below a second threshold, the second threshold being less than the first threshold. In one possible implementation manner, the smoke exhaust assembly comprises a smoke exhaust main pipe and a plurality of smoke exhaust branch pipes connected in parallel with the smoke exhaust main pipe, the energy storage system comprises a plurality of battery clusters, the battery clusters are distributed along the width direction of the energy storage system, each battery cluster comprises a plurality of batteries distributed along the height direction of the energy storage system, each battery cluster corresponds to each smoke exhaust branch pipe, the smoke exhaust branch pipe is connected with the pressure release mechanism of the corresponding battery in the battery cluster, and at least one smoke exhaust branch pipe is provided with the negative pressure prevention device. In one possible implementation manner, a plurality of negative pressure prevention devices are provided, and each negative pressure prevention device corresponds to each smoke exhaust branch pipe. In one possible implementation manner, the negative pressure preventing device and the main smoke exhaust pipe are respectively arranged at two ends of the smoke exhaust branch pipe. In one possible implementation manner, the smoke exhaust branch pipe extends along the height direction of the energy storage system, the negative pressure preventing device is arranged at the bottom of the smoke exhaust branch pipe, and the smoke exhaust main pipe is arranged at the top of the battery cluster and is communicated with the top of the smoke exhaust branch pipe. In one possible implementation, a connecting pipe is arranged on the side, facing the battery cluster, of the smoke exhaust branch pipe, and the connecting pipe is sleeved on the pressure release mechanism. In one possible implementation, the smoke evacuation assembly further comprises a transition tube in communication with the main smoke evacuation tube, the transition tube being located between the main smoke evacuation tube and the outlet of the smoke evacuation assembly in the flow direction of the emissions. In one possible implementation, the energy storage system further includes a fire gate disposed on the transfer tube configured to control on/off of the transfer tube. In one possible implementation, the energy storage system further comprises an air extraction device disposed downstream of the fire damper in the flow direction of the exhaust and configured to direct the exhaust in the transition tube to an outlet of the smoke evacuation assembly. In one possible implementation, the energy storage system further includes a controller in signal communication with the fire damper and configured to control the fire damper to open when the concentration of combustible gas within the smoke evacuation assembly is above a third threshold. In one possible implementation, the energy storage system further comprises a combustible gas detector in signal connection with the controller configured to detect whether the concentration of combustible gas within the smoke evacuation assembly is above the third threshold. In one possible implementation, the smoke evacuation assembly further comprises a check valve dispo