CN216980693U - Energy storage system - Google Patents

Abstract

The utility model relates to an energy storage system, which comprises a box body, a support frame, a fire fighting system, an exhaust system and a control device, wherein the support frame is arranged on the box body; the support frame is arranged in the box body and used for placing a battery module; the fire fighting system is connected with the box body and is used for spraying fire extinguishing agent into the box body; the exhaust system is connected with the box body and is used for exhausting the gas in the box body to the outside of the box body; the control device is respectively connected with the fire-fighting system and the exhaust system and is used for controlling the work of the fire-fighting system and the exhaust system. Wherein, fire extinguishing system can spray extinguishing agent when the battery module generates heat out of control and put out a fire, improves energy storage system's security performance, effectively avoids endangering personnel's safety and reduces loss of property. In addition, combustible gas that produces when can heating out of control with battery module discharges the box through exhaust system, avoids the emergence explosion to can further improve energy storage system's security performance.

Description

Energy storage system

Technical Field

The utility model belongs to the technical field of outdoor energy storage, and particularly relates to an energy storage system.

Background

With the adjustment, transformation and upgrade of global energy structures, the smart grid construction with energy storage technology as the core gradually draws people's attention. However, compared to the conventional power grid technology, the energy storage system is essentially an energy storage technology based on lithium ion batteries, wherein the energy storage system generally protects a battery cabinet and a plurality of lithium ion battery modules installed in the battery cabinet. However, as an energetic material, the lithium ion battery module is liable to thermal runaway under abnormal fault conditions, which further endangers the safety of personnel and causes property loss.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: the energy storage system is provided for solving the problems that in the prior art, the safety of personnel is easily damaged and property loss is caused because the lithium ion battery module generates heat out of control.

In order to solve the technical problem, an embodiment of the present invention provides an energy storage system, including a box body, a support frame, a plurality of battery modules, a first flame-retardant thermal insulation layer, a fire protection system, an exhaust system, and a control device; the supporting frame is arranged in the box body, and the battery module is arranged on the supporting frame; the first flame-retardant heat-insulation layer is arranged between the adjacent battery modules; the fire fighting system is connected with the box body and is used for spraying fire extinguishing agent into the box body; the exhaust system is connected with the box body and used for exhausting gas in the box body to the outside of the box body; the control device is respectively connected with the fire-fighting system and the exhaust system and is used for controlling the work of the fire-fighting system and the exhaust system.

Optionally, the support frame includes a frame body and a plurality of support units, the support units are arranged on the frame body at intervals along a vertical direction, and the support units are used for supporting and placing the battery modules; the supporting unit comprises a first supporting piece and a second supporting piece, and the first supporting piece and the second supporting piece are arranged at intervals left and right to support two opposite ends of the battery module; the two opposite ends of the first flame-retardant heat-insulating layer are respectively connected with the first supporting piece and the second supporting piece of the supporting unit.

Optionally, the battery module includes a plurality of electric cores and a second flame-retardant thermal insulation layer, and the second flame-retardant thermal insulation layer is disposed between the adjacent electric cores.

Optionally, the fire fighting system comprises a fire fighting pipeline, a fire fighting liquid tank and a temperature sensor; the fire fighting pipelines are arranged in the box body, spraying holes are formed in the fire fighting pipelines, and the fire fighting pipelines are multiple and are respectively arranged on two sides of the supporting frame; the fire-fighting liquid tank is connected with the fire-fighting pipeline, and the fire-fighting liquid tank is configured to enable fire extinguishing agent in the fire-fighting liquid tank to enter the fire-fighting pipeline and to be sprayed out from the spraying hole when the fire-fighting liquid tank is opened; the temperature sensor is connected with the control device and used for detecting the temperature in the box body and sending temperature data in the box body to the control device, so that the control device can control the opening and closing of the fire-fighting liquid tank according to the temperature data in the box body.

Optionally, the exhaust system comprises an exhaust valve and a smoke sensor; the first box wall of the box body is provided with an exhaust hole, and the exhaust valve is arranged on the box body and used for opening or closing the exhaust hole; the smoke sensor is installed in the box body, connected with the control device and used for monitoring smoke signals inside the box body and sending the smoke signal data to the control device, so that the control device controls the exhaust valve to work according to the smoke signal data in the box body.

Optionally, the exhaust system further comprises an air extractor connected to the box body for making the gas in the box body flow outwards from the exhaust hole; the air extracting device is installed in the box body and arranged on one side, away from the first box wall, of the exhaust valve.

Optionally, the box body is further provided with an air inlet, and the exhaust system further comprises an air inlet valve, wherein the air inlet valve is installed on the box body and used for opening or closing the air inlet.

Optionally, the exhaust valve includes a valve body, an electric control lock, a baffle plate and an elastic component; the valve body is connected to the first box wall; the electric control lock is arranged on the valve body and connected with the baffle, and the control device is connected with the electric control lock and used for controlling the electric control lock to lock or unlock the baffle; the elastic assembly is arranged between the baffle and the valve body, when the baffle closes the exhaust hole, the baffle is locked by the electric control lock, and the elastic assembly is compressed between the baffle and the valve body; when the baffle plate is loosened by the electric control lock, the elastic component applies force to the baffle plate so that the baffle plate opens the exhaust hole.

Optionally, the elastic assembly includes a first elastic member and a second elastic member, and the first elastic member and the second elastic member are arranged at an interval; when the baffle plate closes the exhaust hole, the first elastic piece and the second elastic piece are compressed between the baffle plate and the valve body, and the deformation amount of the first elastic piece is larger than that of the second elastic piece, so that when the electric control lock releases the baffle plate, the baffle plate is inclined to open the exhaust hole.

Optionally, the first box wall is a top wall of the box body.

The energy storage system provided by the embodiment of the utility model is provided with the first flame-retardant heat-insulating layer, the fire-fighting system and the exhaust system, wherein the first flame-retardant heat-insulating layer can prevent heat spreading between two adjacent electromagnetic modules; the fire extinguishing system can spray fire extinguishing agent to extinguish fire when the battery module is out of control due to heating; combustible gas produced when the battery module generates heat out of control can be discharged out of the box body through the exhaust system, and explosion is avoided. The setting of this triple safeguard measure can improve energy storage system's security performance, effectively avoids endangering personnel's safety, reduces the loss of property that arouses when the battery module generates heat out of control.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor. The utility model is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic diagram of an energy storage system provided in accordance with an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a support frame of an energy storage system according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a battery module of an energy storage system according to an embodiment of the utility model;

fig. 4 is a schematic diagram of a structure at an exhaust valve of an energy storage system according to an embodiment of the utility model.

The specification reference numbers:

100. an energy storage system; 1. a box body; 11. a first tank wall; 12. an exhaust hole; 1a, a box door; 2. a support frame; 3. a battery module; 31. an electric core; 32. a second flame-retardant heat-insulating layer; 4. a first flame-retardant heat-insulating layer; 5. a fire protection system; 51. a fire fighting liquid tank; 52. a fire-fighting pipeline; 521. a spray orifice; 53. a temperature sensor; 6. an exhaust system; 61. an exhaust valve; 611. a valve body; 612. an electromagnetic control device; 613. a baffle plate; 614. a buffer member; 62. an air extraction device; 63. a smoke sensor; 7. a control device; 8. an air conditioner; 9. a distribution box.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

As shown in fig. 1, in an embodiment, the energy storage system 100 includes a box 1, a support frame 2, a plurality of battery modules 3, a first flame-retardant and thermal-insulation layer 4, a fire protection system 5, an exhaust system 6, and a control device 7. The control device 7 is connected with the fire fighting system 5 and the exhaust system 6 for controlling the operation of the fire fighting system 5 and the exhaust system 6.

The supporting frame 2 is arranged in the box body 1, the battery module 3 can be a lithium ion battery module, and the battery module 3 is arranged in the box body 1 and is arranged on the supporting frame 1; the first flame-retardant and heat-insulating layer 4 is provided between the adjacent battery modules 3. When a certain battery module 3 is out of control due to heat, the first flame-retardant heat-insulating layer 4 can prevent the electromagnetic module from generating heat and transmitting the heat to the adjacent battery module 3, so that further out of control due to heat spreading can be prevented. Wherein, the first flame-retardant thermal insulation layer 4 can be an aerogel flame-retardant thermal insulation layer. Fire extinguishing system 5 is connected with box 1 for spray extinguishing agent in to box 1, when leading out of control because of battery module 3 generates heat like this, alright put out a fire with cooling through fire extinguishing system 5. In actual scene, battery module 3 can produce a large amount of combustible gas when out of control that generates heat, and exhaust system 6 is connected with box 1 for gas discharge in the box 1 is outside box 1, and then avoids combustible gas can gather and explode in box 1.

In this embodiment, first fire-retardant insulating layer 4 is used for preventing that heat from stretching, and fire extinguishing systems is used for the cooling to put out a fire, and exhaust system is used for the combustible gas in the exhaust box to realize explosion-proof, and setting up through this triple safeguard measure can avoid endangering personnel to reduce loss of property when battery module 3 is out of control.

As shown in fig. 2, in an embodiment, the supporting frame 2 includes a frame body 21 and a plurality of supporting units 22, the supporting units 22 are arranged on the frame body 21 at intervals along a vertical direction, and the supporting units 22 are used for supporting and placing the battery modules 3. In addition, the supporting unit 22 includes a first supporting member 221 and a second supporting member 222, the first supporting member 221 and the second supporting member 222 are spaced from each other left and right, and the two supporting members are used for supporting two opposite ends of the battery module 3, that is, the battery module 3 straddles the first supporting member 221 and the second supporting member 222. Wherein, the frame body 21 comprises a first supporting portion 211 and a second supporting portion 212 arranged at left and right intervals, the first supporting member 221 is arranged on the first supporting portion 211, the second supporting member 222 is arranged on the second supporting portion 212, and the first supporting member 221 and the second supporting member 222 are both arranged between the first supporting portion 211 and the second supporting portion 212.

As shown in fig. 2, in one embodiment, opposite ends of one first flame-retardant and heat-insulating layer 4 are respectively connected to the first support member 221 and the second support member 222 of one support unit 22, so that adjacent battery modules 3 are separated by the first flame-retardant and heat-insulating layer 4.

As shown in fig. 3, in an embodiment, the battery module 3 includes a plurality of battery cells 31 and a second flame-retardant thermal insulation layer 32, and the second flame-retardant thermal insulation layer 32 is disposed between adjacent battery cells 31. When a certain battery cell 31 is out of control due to heat, the second flame-retardant heat-insulating layer 32 can prevent the battery cell 31 from generating heat and transmitting the heat to the battery cell 31 adjacent to the battery cell, so that the effect of preventing heat from spreading can be further improved. Wherein, the fire-retardant insulating layer 32 of second also can be the fire-retardant insulating layer of aerogel, and first fire-retardant insulating layer 4 can be the same material with the fire-retardant insulating layer 32 of second, can reduce the material kind like this when production, and then is favorable to the production preparation of energy storage system 100.

As shown in fig. 1, in one embodiment, the fire protection system 5 includes a fire protection liquid tank 51 and a fire protection pipe 52. Wherein, the fire fighting liquid tank 51 is used for storing fire extinguishing agent, and the fire fighting pipeline 52 is installed in the box body 1 and connected with the fire fighting pipe. The fire fighting pipeline 52 is provided with a spraying hole 521, the spraying hole 521 penetrates from the outer surface of the fire fighting pipeline 52 to be communicated with the hollow part of the fire fighting pipeline 52, and when the fire fighting liquid tank 51 is opened, the fire extinguishing agent in the fire fighting liquid tank 51 can enter the fire fighting pipeline 52 and is sprayed out from the spraying hole 521. This arrangement may improve the adaptability of the energy storage system 100 to different environments without providing an additional water source for the energy storage system 100.

As shown in fig. 1, in one embodiment, a plurality of fire-fighting pipes 52 are provided, and these fire-fighting pipes 52 are respectively provided on both sides of the support frame 2, so that when the battery module 3 causes an open fire, the fire-fighting pipes 52 can spray fire extinguishing agent to the battery module 3 from both sides of the battery module 3 placed on the support member, which can improve the fire extinguishing effect. In addition, the energy storage system 100 can extinguish the fire of the battery module 3 at a place without a water source by arranging the fire-fighting liquid tank 51. In actual use, the fire extinguishing agent contained in the fire-fighting liquid tank 51 is mainly composed of heptafluoropropane.

As shown in fig. 1, in an embodiment, the fire fighting system 5 further comprises a temperature sensor 53, the temperature sensor 53 is installed in the tank 1 and is used for checking the temperature in the tank 1, and meanwhile, the temperature sensor 53 is connected with the control device 7, the temperature sensor 53 is used for detecting the temperature in the tank 1 and sending the detected temperature data in the tank 1 to the control device 7, so that the control device 7 can control the opening and closing of the fire fighting liquid tank 51 according to the temperature data in the tank 1. For example, when the temperature in the tank 1 is greater than or equal to a predetermined value, the temperature sensor 53 may send temperature data to the control device 7, and the control device 7 may control the fire hose to be opened according to the temperature data. When the temperature in the box body 1 is less than the preset value, the temperature sensor 53 does not send temperature data to the control device 7, and the control device 7 controls the fire fighting pipe to be closed. In addition, an electromagnetic valve is installed at an opening of the fire-fighting liquid tank 51, the control device 7 is connected with the electromagnetic valve, and the control device 7 controls the electromagnetic valve to operate so as to open or close the fire-fighting liquid tank 51.

Of course, the controller 7 may control the operation of the fire-fighting liquid tank 51 in another manner after receiving the temperature data transmitted from the temperature sensor 53 during the actual operation. For example, the control device 7 may control the fire-fighting liquid tank 51 for a certain time after receiving the electric signal transmitted from the temperature sensor 53, and during this time, the control device 7 does not control the fire-fighting liquid tank 51 to change the operating state even if the temperature sensor 53 has stopped transmitting the temperature data to the control device 7.

In addition, a plurality of temperature sensors 53 can be arranged at different positions in the box body 1, when any one of the temperature sensors 53 sends temperature data to the control device 7, the control device controls the fire-fighting liquid tank 51 to be opened, and therefore the detection sensitivity can be improved.

Furthermore, in some embodiments, the determination of the actual temperature in the tank 1 and the magnitude of the predetermined value may also be performed by the control device. In this case, the temperature sensor 53 may transmit the detected temperature data to the control device 7 in real time, and the control device 7 may determine the magnitude relationship between the temperature in the case 1 and the predetermined value based on the temperature data.

As shown in fig. 1 and 4, in one embodiment, the exhaust system 6 includes an exhaust valve 61, a suction device 62, and a smoke sensor 63. The first box wall 11 of the box body 1 is provided with an exhaust hole 12, and an exhaust valve 61 is arranged on the box body 1 and used for opening or closing the exhaust hole 12; the air extracting device 62 is connected with the box body 1 and is used for enabling the air in the box body 1 to flow outwards from the exhaust hole 12; the smoke sensor 63 is installed in the box body 1, the smoke sensor 63 is connected with the control device 7, and the smoke sensor 63 is used for monitoring smoke signals in the box body 1 and sending smoke signal data to the control device 7, so that the control device 7 can control the exhaust valve 61 to work according to the smoke signal data in the box body 1. The arrangement of the smoke sensor 63 can improve the sensitivity of the exhaust system 6, and can effectively avoid the overlarge pressure in the box body 1, thereby further improving the safety performance of the energy storage system 100. It should be understood that the gas evacuation device 62 merely accelerates the outward flow of the gas in the tank 1, and in some embodiments, the gas evacuation function can be achieved even if the gas evacuation device 62 is not provided.

In a normal state, the exhaust valve 61 closes the exhaust hole 12, so that dust, insects, etc. are prevented from entering the case 1 through the exhaust hole 12. Meanwhile, in a normal state, the air extracting device 62 does not work, so that energy consumption can be reduced. When the battery module 3 generates thermal runaway to generate combustible gas, the smoke sensor 63 transmits smoke signal data to the control device 7, the control device 7 can control the exhaust valve 61 to operate according to the smoke signal data to open the exhaust hole 12, and meanwhile, the control device 7 also controls the air exhaust device 62 to operate according to the smoke signal to exhaust the gas in the box 1 out of the box 1 through the exhaust hole 12.

As shown in fig. 1, in one embodiment, the first box wall 11 is a top wall of the box body 1, that is, the vent hole 12 is provided on the top wall of the box body 1. Since the flammable gas generally flows upward and eventually converges at the top of the tank 1, the provision of the exhaust hole 12 on the top wall of the tank 1 is more advantageous in exhausting the flammable gas. In addition, when the exhaust hole 12 is formed on the top wall of the case 1, the suction device 62 and the exhaust valve 61 are also installed on the top wall, which makes the case 1 more beautiful.

As shown in fig. 4, in an embodiment, the exhaust valve 61 includes a valve body 611, an electric control lock 612, a baffle 613 and a resilient assembly 614; the valve body 611 is attached to the first tank wall; the electric control lock 612 is arranged on the valve body 611 and connected with the baffle 613, and the control device 7 is connected with the electric control lock 612 and used for controlling the electric control lock 612 to lock or unlock the baffle 613; the elastic component 614 is arranged between the baffle 613 and the valve body 611, when the baffle 613 closes the exhaust hole 12 (i.e. in a normal state), the electric control lock 612 locks the baffle 613, and the elastic component 614 is compressed between the baffle 613 and the valve body 611; when the electric control lock 612 releases the baffle 613, the elastic component 614 applies force to the baffle 613, so that the baffle 613 opens the exhaust hole 12. In addition, the valve body 611 is fixed in the box body 1, the baffle 613 is located outside the box body 1, and initially, the baffle 613 abuts against the first box wall 11 to close the exhaust hole 12. In addition, in the present embodiment, a reset device is not provided so that the shutter 613 can be automatically reset to close the exhaust hole 12 again after the shutter 613 is controlled to open the exhaust hole 12, which can reduce the production cost.

As shown in fig. 4, in an embodiment, the elastic component 614 includes a first elastic member 615 and a second elastic member 616, and the first elastic member 615 and the second elastic member 616 are spaced apart; when the blocking plate 613 closes the venting hole 12, the first elastic member 615 and the second elastic member 616 are compressed between the blocking plate 613 and the valve body 611, and the deformation amount of the first elastic member 615 is greater than that of the second elastic member 616, so that when the electric control lock 612 releases the blocking plate 613, the blocking plate 613 is tilted to open the venting hole 12.

The first elastic element 615 and the second elastic element 616 may be springs and made of the same material, and at this time, the length of the first elastic element 615 may be greater than that of the second elastic element 616, and the positions of the two elastic elements connected to the valve body 611 may be aligned, and the positions of the two elastic elements connected to the baffle 613 may be aligned.

As shown in fig. 4, in an embodiment, the air exhaust device 62 is installed in the box 1 and disposed on a side of the exhaust valve 61 away from the first box wall 11, so that the exhaust valve 61 can be protected by the box 1 and the exhaust valve 61, and the service life of the air exhaust device 62 is prolonged. In particular, the suction device 62 is mounted on the side of the valve body 611 facing away from the wall of the first tank 1. Further, the air extracting device 62 may be an exhaust fan or the like.

In practical situations, the space inside the box 1 is limited, and the air extractor 62 is operated to easily absorb negative pressure inside the box 1, which may cause damage to the box 1. To address this problem, as shown in fig. 1, in an embodiment, the box body 1 is further provided with an air inlet, and the exhaust system 6 further includes an air inlet valve 64, and the air inlet valve 64 is mounted on the box body 1 and used for opening or closing the air inlet. In addition, the air inlet valve 64 is connected with the control device 7, when the control device 7 controls the exhaust valve 61 and the air extractor 62 to work, the control device 7 can also control the air inlet valve 64 to work to open the air inlet hole, so that the air outside the box body 1 can enter the box body 1 from the air inlet hole, and the negative pressure generated in the box body 1 can be avoided. Further, the intake valve 64 may be configured identically to the exhaust valve 61.

In one embodiment, the height of the air intake hole is set to be smaller than that of the air discharge hole 12, which is more advantageous in discharging the combustible gas and facilitating the introduction of the external air into the case 1. Wherein, the air inlet can be arranged on the side wall of the box body 1.

As shown in fig. 1, in an embodiment, the energy storage system 100 further includes an air conditioner 8, and the air conditioner 8 is mounted on the box 1 and used for adjusting the temperature in the box 1, so that the battery modules 3 in the box 1 can work in a proper temperature environment. The box body 1 is a cavity structure with an opening at one end, the energy storage system 100 further comprises a box door 1a, the box door 1a is connected with the box body 1 and used for opening or closing the opening of the box body, and the air conditioner 8 is installed on the box door 1 a.

As shown in fig. 1, in an embodiment, the energy storage system 100 further includes a distribution box 9, the distribution box 9 is installed in the box body 1, and corresponding electrical components are disposed in the distribution box 9, and the electrical components may be one or any combination of an air switch, a circuit breaker, a contactor, a fuse, and the like.

It will be appreciated that the corresponding designs in the above embodiments may be replaced in other ways, for example:

in other embodiments, the baffle 613 may also be automatically reset after the exhaust hole 12 is opened to re-close the exhaust hole 12, and at this time, a reset device such as an electromagnet that can be energized to apply force to the baffle may be additionally provided in the above embodiments, so that the baffle closes the exhaust hole. Or, the electronic control lock in the above embodiment is directly replaced with an electromagnetic driving device such as an electromagnet, where the electromagnetic driving device such as the electromagnet can change according to the power-on condition to drive the movement direction of the baffle, for example, after power-on, the electromagnetic driving devices can drive the baffle to be far away from the box body, so as to open the exhaust hole, and after power-off, the electromagnetic driving device resets to drive the baffle to be close to the box body, so as to close the exhaust hole. Of course, in practical products, the exhaust valve 61 may be other existing solenoid valves.

The above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the utility model, but rather, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.

Claims (10)

1. An energy storage system is characterized by comprising a box body, a support frame, a plurality of battery modules, a first flame-retardant heat-insulating layer, a fire-fighting system, an exhaust system and a control device;

the supporting frame is arranged in the box body, and the battery module is arranged on the supporting frame;

the first flame-retardant heat-insulation layer is arranged between the adjacent battery modules;

the fire fighting system is connected with the box body and is used for spraying fire extinguishing agent into the box body;

the exhaust system is connected with the box body and used for exhausting gas in the box body to the outside of the box body;

the control device is respectively connected with the fire-fighting system and the exhaust system and is used for controlling the work of the fire-fighting system and the exhaust system.

2. The energy storage system of claim 1, wherein the support frame comprises a frame body and a plurality of support units, the plurality of support units are arranged on the frame body at intervals along the vertical direction, and the support units are used for supporting and placing the battery modules;

the supporting unit comprises a first supporting piece and a second supporting piece, and the first supporting piece and the second supporting piece are arranged at left and right intervals to support two opposite ends of the battery module;

the two opposite ends of the first flame-retardant heat-insulation layer are respectively connected with the first supporting piece and the second supporting piece of the supporting unit.

3. The energy storage system of claim 1, wherein the battery module comprises a plurality of cells and a second flame-retardant, thermally insulating layer disposed between adjacent cells.

4. The energy storage system of claim 1, wherein the fire protection system comprises a fire conduit, a fire tank, and a temperature sensor;

the fire fighting pipelines are arranged in the box body, spraying holes are formed in the fire fighting pipelines, and the fire fighting pipelines are multiple and are respectively arranged on two sides of the supporting frame;

the fire fighting liquid tank is connected with the fire fighting pipeline, and the fire fighting liquid tank is configured to enable fire extinguishing agent in the fire fighting liquid tank to enter the fire fighting pipeline and be sprayed out from the spraying hole when the fire fighting liquid tank is opened;

the temperature sensor is connected with the control device and used for detecting the temperature in the box body and sending temperature data in the box body to the control device, so that the control device can control the fire-fighting liquid tank to be opened and closed according to the temperature data in the box body.

5. The energy storage system of claim 1, wherein the exhaust system comprises an exhaust valve and a smoke sensor;

the first box wall of the box body is provided with an exhaust hole, and the exhaust valve is arranged on the box body and used for opening or closing the exhaust hole;

the smoke sensor is installed in the box body, connected with the control device and used for monitoring smoke signals inside the box body and sending the smoke signal data to the control device, so that the control device controls the exhaust valve to work according to the smoke signal data in the box body.

6. The energy storage system of claim 5, wherein the exhaust system further comprises an air extraction device coupled to the tank for flowing air from the tank outwardly from the exhaust aperture;

the air extracting device is installed in the box body and arranged on one side, away from the first box wall, of the exhaust valve.

7. The energy storage system of claim 5, wherein the tank further comprises an air inlet hole, and the exhaust system further comprises an air inlet valve mounted on the tank for opening or closing the air inlet hole.

8. The energy storage system of claim 5, wherein the vent valve comprises a valve body, an electrically controlled lock, a baffle, and a resilient assembly;

the valve body is connected to the first box wall;

the electric control lock is arranged on the valve body and connected with the baffle, and the control device is connected with the electric control lock and used for controlling the electric control lock to lock or unlock the baffle;

the elastic component is arranged between the baffle and the valve body, when the baffle closes the exhaust hole, the baffle is locked by the electric control lock, and the elastic component is compressed between the baffle and the valve body; when the baffle is loosened by the electric control lock, the elastic component applies force to the baffle so that the exhaust hole is opened by the baffle.

9. The energy storage system of claim 8, wherein the spring assembly comprises a first spring and a second spring, the first spring and the second spring being spaced apart;

when the baffle plate closes the exhaust hole, the first elastic piece and the second elastic piece are compressed between the baffle plate and the valve body, and the deformation amount of the first elastic piece is larger than that of the second elastic piece, so that when the electric control lock releases the baffle plate, the baffle plate is inclined to open the exhaust hole.

10. The energy storage system of claim 5, wherein the first tank wall is a top wall of the tank.

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