Centralized water spraying fire-fighting heat management energy storage power station

Abstract

The invention relates to the technical field of energy storage heat management, and discloses a centralized water spraying fire-fighting heat management energy storage power station which comprises a plurality of energy storage prefabricated cabins, a water storage assembly for cooling or heating battery packs in the energy storage prefabricated cabins and a liquid supplementing pipeline matched with the water storage assembly. The water storage assembly is communicated with the liquid cooling plate through a liquid supplementing pipeline to cool, heat or spray fire in each battery pack in the battery cabin; and the liquid cooling cavity and the water spraying fire-fighting cavity share part of the liquid supplementing pipeline. According to the energy storage prefabricated cabin, cooling / heating liquid in the energy storage system can serve as fire fighting water at the same time, the water utilization efficiency is improved, and the safety of the energy storage prefabricated cabin is further improved; meanwhile, part of water spraying fire fighting and liquid cooling / heating pipelines are shared, the pipeline design is simplified, and the design cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of energy storage thermal management and fire protection technology, and in particular to a centralized water sprinkling fire protection thermal management energy storage power station. Background Art

[0002] With the development of the energy storage market, liquid cooling technology and fire protection technology are increasingly being applied to the field of electrochemical energy storage to ensure that batteries operate safely within the most suitable temperature range. However, the liquid cooling system and fire protection system in traditional electrochemical energy storage systems operate independently, which results in a complex structure, single function, and high cost of use for the entire energy storage system. The fire protection system cannot continuously extinguish and cool the battery, and the energy storage system is prone to re-ignition. Summary of the invention

[0003] 1. Technical issues to be solved

[0004] In view of the shortcomings of the prior art, the present invention provides a centralized water sprinkler fire protection thermal management energy storage power station to solve the problems of complex fire protection and liquid cooling structure, high cost and poor safety of the current energy storage system.

[0005] (II) Technical solution

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A centralized water-sprinkling fire-fighting thermal management energy storage power station includes several energy storage prefabricated cabins, a water storage component for cooling or heating the battery pack in the energy storage prefabricated cabin, and a liquid replenishment pipeline matched with the water storage component. The energy storage prefabricated cabin includes several battery compartments. The water storage component is connected to a liquid cooling plate through a liquid replenishment pipeline to cool, heat or water-sprinkle each battery pack in the battery compartment; the inner cavity of the liquid cooling plate is provided with a liquid cooling chamber and a water-sprinkling fire-fighting chamber, and water used to cool or heat the battery pack flows through the liquid cooling chamber; when the battery temperature exceeds a preset temperature threshold 1, controllable valve 1 is opened, controllable valve 2 is closed, and the battery pack is sprayed to extinguish the fire and cool it through the spray port on the water-sprinkling fire-fighting chamber of the liquid cooling plate. After the spray water is collected by a water receiving tray, it is pumped back into the water storage component through a fire-fighting liquid return pipe.

[0008] Preferably, the water storage assembly includes a water reservoir, a refrigeration unit and a heater, the refrigeration unit and the heater are used to cool and heat the water in the water reservoir, and the water reservoir is provided with a water temperature sensor and a liquid level meter. The water volume of the water reservoir meets the cooling or heating requirements of all batteries in the energy storage prefabricated cabin for one discharge, and the water volume of the water reservoir meets at least twice the firefighting water volume required when thermal runaway occurs in one of the energy storage prefabricated cabins.

[0009] Preferably, a water tank is provided in each of the prefabricated energy storage cabins, and the water tank is connected to the liquid cooling cavity and the water reservoir by pipes; the water reservoir is preburied underground; the liquid replenishment pipeline, the water tank and the pipelines in the prefabricated energy storage cabin are all insulated; the water volume in the water tank meets the cooling or heating requirements for one discharge of a battery pack in a battery cluster, and the water volume in the water tank meets at least twice the fire water volume required when a thermal runaway occurs in one of the battery packs.

[0010] Preferably, the water tank provides cooling / heating / firefighting water for the corresponding prefabricated energy storage cabin, the liquid level gauge and water temperature sensor are arranged in the water tank, and the water temperature and water level in the water tank are regulated by the water pumped into the water reservoir.

[0011] Preferably, the fluid replenishment pipeline includes a fluid replenishment main pipe connected to the water storage component, the fluid replenishment main pipe is connected to the water tank in the energy storage prefabricated cabin through a plurality of fluid replenishment branch pipes, the water tank is connected to the liquid cooling chamber through a liquid inlet circulation pipe and a plurality of liquid inlet circulation branch pipes, the liquid cooling chamber is connected to the water tank through a coolant return branch pipe and a coolant return pipe, the liquid inlet circulation pipe is connected to a fire-fighting fluid inlet pipe, the fire-fighting fluid inlet pipe is connected to the sprinkler fire-fighting chamber through a plurality of fire-fighting fluid inlet branch pipes, and a controllable valve is arranged on the fire-fighting fluid inlet pipe.

[0012] Preferably, a water receiving tray is arranged in the battery compartment below the battery cluster, and the water receiving tray is connected to the water tank through a circulating pump and a fire-fighting liquid return pipe, and each water tank is connected to the water reservoir through a return pump and a return pipeline.

[0013] Preferably, a water sprinkler fire fighting chamber and a liquid cooling chamber separated from each other are provided inside the liquid cooling plate, a plurality of spray ports connected to the water sprinkler fire fighting chamber are opened on the liquid cooling plate, a fire fighting liquid inlet connected to the water sprinkler fire fighting chamber is provided on the liquid cooling plate, the fire fighting liquid inlet is connected to the fire fighting liquid inlet branch pipe, a coolant inlet and a coolant outlet connected to the liquid cooling chamber are provided on the liquid cooling plate, the coolant inlet is connected to the coolant inlet branch pipe, and the coolant outlet is connected to the coolant return branch pipe.

[0014] Preferably, the water in the water tank is pumped back into the water storage component through a liquid return pump to circulate and cool / heat the overheated / overcooled water; the water storage component is replenished with water through a municipal water interface; and the water in the water storage component is heated or cooled during valley electricity.

[0015] (III) Beneficial effects

[0016] The present invention has the following beneficial effects:

[0017] This centralized water-sprinkling fire-fighting thermal management energy storage power station opens / closes controllable valve 1 / controllable valve 2 when the battery temperature exceeds the preset threshold, and performs liquid cooling, heating or water-sprinkling fire extinguishing and cooling on the battery pack in the energy storage prefabricated cabin, quickly reducing the temperature of the abnormal battery pack and the surrounding battery packs, preventing the battery pack from thermal diffusion, and improving the safety of the energy storage prefabricated cabin. The energy storage system shares water storage components, and centrally cools or heats the water storage components; uses water with high specific heat capacity as the cold / heat storage medium of the refrigeration unit, and uses valley electricity for long-term cooling or heating, reducing the power and procurement cost of the refrigeration unit; by opening and closing the controllable valve, the conversion between liquid cooling and fire water circuits is realized, and part of the water pipeline is shared, simplifying the pipeline design in the battery cabin and reducing the design cost; the water in the reservoir provides cooling / heating liquid for the battery pack, and can also be used as fire water, improving the water utilization efficiency; reducing the operating cost of the entire energy storage system and improving the safety of the energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the energy storage system of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of the liquid cooling plate of the present invention;

[0020] Figure 3 This is a schematic diagram of an energy storage system with a simplified structure of the present invention.

[0021] In the figure: 1. water storage component; 11. liquid level meter; 12. heater; 13. water temperature sensor; 14. refrigeration unit; 2. liquid replenishment main pipe; 3. liquid replenishment branch pipe; 4. energy storage prefabricated cabin; 41. water tank; 42. battery compartment; 43. liquid inlet circulation pipe; 431. liquid inlet circulation branch pipe; 44. battery cluster; 45. liquid cooling plate; 451. coolant inlet; 452. coolant outlet; 453. fire-fighting liquid inlet; 454. sprinkler; 46. coolant return pipe; 47. coolant return branch pipe; 48. fire-fighting liquid inlet pipe; 49. fire-fighting liquid inlet branch pipe; 410. water receiving tray; 411. water receiving tray; 412. fire-fighting liquid return pipe. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1The present invention provides a technical solution: a centralized water-sprinkling fire-fighting thermal management energy storage power station, including a plurality of energy storage prefabricated cabins 4, a water storage assembly 1 for cooling or heating the battery pack in the energy storage prefabricated cabin 4, and a liquid replenishment pipeline coordinated with the water storage assembly 1; the energy storage prefabricated cabin 4 includes a plurality of battery cabins 42, the water storage assembly 1 is connected to the liquid cooling plate 45 through the liquid replenishment pipeline to cool, heat or water-sprinkle fire-fighting and cooling each battery pack in the battery cluster 44 in the battery cabin 42, the inner cavity of the liquid cooling plate 45 is provided with a liquid cooling cavity and a water-sprinkling fire-fighting cavity, the liquid cooling cavity flows with water used for cooling or heating the battery pack, and a liquid return pipeline is provided between the liquid cooling cavity and the water tank 41. By monitoring the temperature of the battery pack, when the battery temperature exceeds the preset temperature threshold, the controllable valve is opened and closed to allow the coolant to flow through the spray port 454 on the water-sprinkling fire-fighting cavity of the liquid cooling plate to spray and extinguish the lower battery pack. After the spray water is collected in the water receiving tray 410 , it is pumped back into the water storage assembly 1 through the fire-fighting liquid return pipeline 412 .

[0024] The present invention monitors the temperature threshold of the battery pack, opens the controllable valve, performs liquid cooling or heating on the battery pack in the energy storage prefabricated cabin 4, or performs water spraying to extinguish fire and cool down the abnormal battery pack, quickly reduces the temperature of the abnormal battery pack and its surrounding battery packs, controls the thermal runaway and thermal diffusion of the battery, and improves the safety of the energy storage prefabricated cabin 4. The energy storage system shares the water storage component 1, and the valley electricity is centralized for cooling or heating, which effectively reduces the use cost; the liquid cooling pipeline and the fire fighting pipeline in the energy storage prefabricated cabin 4 realize the conversion of liquid cooling and fire fighting water through the opening and closing of the controllable valve, and share part of the liquid replenishment pipeline, simplifying the pipeline design in the battery cabin 42 and reducing the design cost; the water in the water storage component 1 provides cooling / heating liquid for the battery pack in the battery cabin 42, and is also used as fire fighting water, which improves the utilization efficiency of water and reduces the operating cost of the entire energy storage system.

[0025] Reference Figure 1 and 2 As shown, in this embodiment, the water storage component 1 includes a water reservoir, a refrigeration unit 14 and a heater 12. The refrigeration unit 14 and the heater 12 are used to cool and heat the water in the water reservoir. A water temperature sensor 13 and a liquid level meter 11 are arranged in the water reservoir. The water volume of the water reservoir meets the cooling or heating requirements of the battery packs in all the energy storage prefabricated cabins 4 for one discharge; the water volume of the water reservoir at least meets the fire water volume required for more than twice when a thermal runaway occurs in one energy storage prefabricated cabin 4. When the water temperature in the water reservoir exceeds the threshold, the refrigeration unit 14 or the heater 12 cools or heats the water. When the liquid level meter 11 detects that the water level in the water reservoir is too low, the water reservoir is supplemented with water through the municipal water inlet. Since the water reservoir is used for centralized water supply, centralized cooling / heating can be performed for a long time during off-peak hours, and cooling / heating liquid / fire water can be provided to each energy storage prefabricated cabin 4, reducing the system design and use costs.

[0026] In this embodiment, a water tank 41 is arranged in the energy storage prefabricated cabin 4. The water tank 41 is cyclically connected with the liquid cooling chamber and the water reservoir. The water reservoir is preburied underground. The liquid replenishment pipeline, the water tank 41, the energy storage prefabricated cabin 4 and the water reservoir pipeline are all insulated to reduce the impact of the external environment on the water temperature in the water tank, the water reservoir and the pipeline.

[0027] Reference Figure 3 As shown, in this embodiment, according to the cost control needs, the fire water can also be collected and discharged from the wastewater outlet.

[0028] Reference Figure 1 and 2 As shown, in this embodiment, the water tank 41 provides cooling / heating / firefighting water for the corresponding energy storage prefabricated cabin 4, and a liquid level meter 11 and a water temperature sensor 13 are arranged in the water tank 41. The water volume of the water tank 41 can meet the cooling or heating requirements for one discharge of the battery pack in its battery cluster, and at least meet the firefighting water volume required for more than twice when a battery pack in the battery cluster has thermal runaway; the water temperature and water level in the water tank 41 are regulated by the water pumped in from the reservoir.

[0029] In this embodiment, the liquid replenishment pipeline includes a liquid replenishment main pipe 2 connected to the water storage component 1, the liquid replenishment main pipe 2 is connected to the water tank 41 in the energy storage prefabricated cabin 4 through a plurality of liquid replenishment branch pipes 3, the water tank 41 is connected to the liquid cooling chamber through a liquid inlet circulation pipe 43 and a plurality of liquid inlet circulation branch pipes 431 one by one, the liquid cooling chamber is connected to the water tank 41 through a coolant return branch pipe 47 and a coolant return pipe 46, the liquid inlet circulation pipe 43 is connected to a fire-fighting liquid inlet pipe 48, the fire-fighting liquid inlet pipe 48 is connected to the water sprinkler fire-fighting chamber one by one through a plurality of fire-fighting liquid inlet branch pipes 49, and a controllable valve is provided on the fire-fighting liquid inlet pipe 48.

[0030] Reference Figure 1 and 2 As shown, in this embodiment, a water receiving tray 410 is arranged below the battery pack to collect the fire water sprayed from the liquid cooling plate spray port 454, and the fire water is pumped back into the water tank 41 through a circulating pump to continuously circulate water to extinguish the fire and cool the battery pack.

[0031] Reference Figure 2 and 3As shown, in this embodiment, a water sprinkler fire fighting chamber and a liquid cooling chamber separated from each other are provided inside the liquid cooling plate 45, and a plurality of spray ports 454 are provided on the water sprinkler fire fighting chamber. A fire fighting liquid inlet 453 connected to the water sprinkler fire fighting chamber is provided on the liquid cooling plate 45, and the fire fighting liquid inlet 453 is connected to the fire fighting liquid inlet branch pipe 49; a coolant inlet 451 and a coolant outlet 452 connected to the liquid cooling chamber are provided on the liquid cooling plate 45, and the coolant inlet 451 is connected to the coolant liquid inlet branch pipe, and the coolant outlet 452 is connected to the coolant liquid return branch pipe 47. When the temperature of the battery pack exceeds the set threshold value 1, the controllable valve 2 is opened, the controllable valve 1 and the controllable valve 3 are closed, and the water in the water tank 41 is circulated into the water tank 41 by the booster pump through the liquid inlet circulation pipe 43, the liquid inlet circulation branch pipe 431, the liquid cooling plate 45, the coolant liquid return branch pipe 47, the coolant liquid return pipe 46 and the controllable valve 2. When the battery temperature exceeds threshold value 2, controllable valve 2 is closed and controllable valve 1 is opened. The coolant flows from the coolant return pipe 46 into the fire-fighting liquid inlet pipe 48 and the fire-fighting liquid inlet branch pipe 49, and is sprayed out through the spray port 454 on the liquid cooling plate 45 to extinguish the fire and cool the battery pack. The spray water is collected by the water receiving tray 411 at the bottom of the battery pack, and then the fire-fighting liquid is pumped back into the water tank 41 by the circulating pump through the fire-fighting liquid return pipe 412.

[0032] In this embodiment, the water in the water tank 41 is pumped back into the water reservoir by a return pump to realize the recycling of cooling / firefighting water. The water storage component 1 is replenished with water through the municipal water interface; during long off-peak hours or in an emergency, the water in the water storage component 1 is centrally heated or cooled to provide cooling / heating liquid / firefighting water for each water tank 41, thereby reducing the system design and use costs.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A centralized water-sprinkling fire-fighting thermal management energy storage power station, comprising a plurality of prefabricated energy storage cabins, a water storage assembly for cooling or heating the battery packs in the prefabricated energy storage cabins, and a liquid replenishment pipeline coordinated with the water storage assembly, characterized in that: The energy storage prefabricated cabin includes a plurality of battery compartments. The water storage assembly is connected to the liquid cooling plate through a liquid replenishment pipeline, and each battery pack in the battery compartment is independently cooled, heated or water-drenched for fire extinguishing and cooling. The inner cavity of the liquid cooling plate is provided with a liquid cooling chamber and a water-drenching fire-fighting chamber. Water for cooling or heating the battery pack circulates in the liquid cooling chamber. By monitoring the temperature of the battery pack, when the preset temperature threshold is exceeded, the spray port on the water-drenching fire-fighting chamber sprays water to extinguish and cool the battery pack. The spray water is collected through a water receiving tray arranged at the bottom of the battery compartment and then pumped back into the water storage assembly through a fire-fighting liquid return pipeline. A liquid replenishment pipeline is shared between the battery pack and the water storage assembly, and water supply to the liquid cooling chamber or the water-drenching fire-fighting chamber is achieved by controlling a controllable valve on the liquid replenishment pipeline.

2. A centralized water sprinkler fire protection thermal management energy storage power station according to claim 1, characterized in that: The water storage component includes a water tank, a refrigeration unit and a heater; the refrigeration unit and the heater are used to cool and heat the water in the water tank; a water temperature sensor and a liquid level meter are arranged in the water tank; the water volume of the water tank meets the cooling or heating requirements for one discharge of the battery packs in all the energy storage prefabricated cabins, and the water volume of the water tank meets at least twice the fire water volume required when thermal runaway occurs in one of the energy storage prefabricated cabins.

3. A centralized water sprinkling fire protection thermal management energy storage power station according to claim 2, characterized in that: A water tank is provided in the prefabricated energy storage cabin, and the water tank is connected to the liquid cooling cavity and the water reservoir by a pipe. The water reservoir is preburied underground, and the liquid replenishment pipeline, the water tank and the pipeline in the prefabricated energy storage cabin are all insulated. The water volume in the water tank meets the cooling or heating requirements for one discharge of a battery pack in a battery cluster, and the water volume in the water tank meets at least twice the fire water volume required when a thermal runaway occurs in the battery pack.

4. A centralized water sprinkling fire protection thermal management energy storage power station according to claim 3, characterized in that: The water tank provides cooling / heating / firefighting water for the corresponding energy storage prefabricated cabin. The liquid level meter and water temperature sensor are arranged in the water tank. The water temperature and water level in the water tank are adjusted by the water pumped into the water reservoir.

5. A centralized water sprinkling fire protection thermal management energy storage power station according to claim 4, characterized in that: The liquid replenishment pipeline includes a liquid replenishment main pipe connected to the water storage component, the liquid replenishment main pipe is connected to the water tank one by one through a plurality of liquid replenishment branch pipes, the water tank is connected to the liquid cooling chamber one by one through a liquid inlet circulation pipe and a plurality of liquid inlet circulation branch pipes, the liquid cooling chamber is connected to the water tank through a coolant return branch pipe and a coolant return pipe, the liquid inlet circulation pipe is connected to a fire-fighting liquid inlet pipe, the fire-fighting liquid inlet pipe is connected to the water sprinkler fire-fighting chamber one by one through a plurality of fire-fighting liquid inlet branch pipes, and a controllable valve is arranged on the fire-fighting liquid inlet pipe.

6. A centralized water sprinkling fire protection thermal management energy storage power station according to claim 5, characterized in that: A water receiving tray is arranged in the battery compartment below the battery cluster. The water receiving tray is connected to the water tank through a circulating pump and a fire-fighting liquid return pipe. The water tank is connected to the water reservoir through a return pump and a return pipeline.

7. A centralized water sprinkling fire protection thermal management energy storage power station according to claim 6, characterized in that: The liquid cooling plate is provided with a sprinkler fire fighting cavity and a liquid cooling cavity separated from each other, and a plurality of spray ports are provided on the sprinkler fire fighting cavity; the liquid cooling plate is provided with a fire fighting liquid inlet connected to the sprinkler fire fighting cavity, and the fire fighting liquid inlet is connected to the fire fighting liquid inlet branch pipe; the liquid cooling plate is provided with a coolant inlet and a coolant outlet connected to the liquid cooling cavity, the coolant inlet is connected to the coolant inlet branch pipe, and the coolant outlet is connected to the coolant return branch pipe.

8. A centralized water sprinkling fire protection thermal management energy storage power station according to claim 7, characterized in that: The water in the water tank is pumped back into the water storage component through a return pump to circulate and cool / heat the overheated / overcooled water; the water storage component is replenished with water through a municipal water interface; and the water in the water storage component is heated or cooled during off-peak hours.

Images