A smothering fire suppression system for a chemical battery compartment

Abstract

The utility model discloses a kind of asphyxiation type fire-fighting systems of chemical battery cabin, including several chemical battery cabin, still including CO2 centralized cooling system, for centralized supply CO2 liquid and recycle CO2 liquid gas mixture;CO2 centralized cooling system is communicated with each chemical battery cabin and forms CO2 liquid gas circulation pipeline;Fire control module connected with CO2 liquid gas circulation pipeline is equipped in chemical battery cabin.The following advantages are provided: using CO2 centralized cooling system, using CO2 liquid as cold carrier, providing cold energy to battery pack in several chemical battery cabin, to ensure the energy storage operation safety of chemical battery cabin, and setting fire control module in chemical battery cabin, filling CO2 gas in cabin space by fire control module and reaching fire-fighting demand concentration, while making oxygen content in cabin below certain safety value (oxygen concentration 15%), so as to achieve the effect of "asphyxia", meet the fire-fighting demand in the normal operation process of chemical battery cabin.

Description

Technical Field

[0001] This utility model relates to the technical field of energy storage system related equipment, specifically to an asphyxiation fire protection system for a chemical battery compartment. Background Technology

[0002] Currently, chemical battery compartments are widely used in the energy storage market, but chemical batteries pose a significant risk of thermal runaway and fire, while existing fire protection design standards are inadequate. Currently, fire suppression systems primarily use perfluorohexanone or heptafluoropropane, but due to limitations in extinguishing concentration and cost, the batteries still face the risk of reignition, requiring further improvement. Utility Model Content

[0003] One technical problem this application aims to solve is to overcome the deficiencies of the above-mentioned related technologies and provide an asphyxiation fire suppression system for a chemical battery compartment. This system uses liquid CO2 as a refrigerant to absorb the heat generated by the energy storage and operation of the chemical battery compartment and fills the chemical battery compartment with CO2 gas at a concentration that meets the fire protection requirements, thereby satisfying the fire protection requirements and cooling needs of the chemical battery compartment.

[0004] The technical solution adopted by this utility model to solve the technical problem is: an asphyxiation fire suppression system for chemical battery compartments, comprising several chemical battery compartments. It also includes a centralized CO2 cooling system for centrally supplying liquid CO2 and recovering CO2 liquid-gas mixtures; The centralized CO2 cooling system is connected to each chemical battery compartment to form a CO2 liquid-gas circulation pipeline. The chemical battery compartment is equipped with a fire control module, which is connected to a CO2 liquid-gas circulation pipeline. The fire control module is used to fill the compartment with CO2 gas at the required concentration to create an oxygen-deficient environment.

[0005] Compared with related technologies, this utility model has the following advantages: It adopts a CO2 centralized cooling system, using liquid CO2 as a refrigerant to provide cooling energy to the battery packs in several chemical battery compartments, thereby ensuring the safe operation of the energy storage in the chemical battery compartments. A fire control module is installed in the chemical battery compartment, which fills the space inside the compartment with CO2 gas to achieve the required fire-fighting concentration, while keeping the oxygen content inside the compartment below the safe value, thereby achieving the effect of "asphyxiation" and meeting the fire-fighting requirements during the normal operation of the chemical battery compartment.

[0006] Preferably, the CO2 centralized cooling system includes a CO2 liquid storage tank, a CO2 liquid circulation pump, a gas-liquid separator, a heat exchanger, and a refrigeration unit. The CO2 liquid circulation pump is located on the supply pipe of the CO2 liquid storage tank, which is connected to the inlet pipe of each chemical battery compartment. The return pipe of each chemical battery compartment is connected to the gas-liquid separator. A pressure balance pipe connects the gas-liquid separator and the CO2 liquid storage tank. The condenser tube of the heat exchanger is connected to the return pipe between the gas-liquid separator and the CO2 liquid storage tank. The evaporator tube of the heat exchanger is circulatedly connected to the refrigeration unit. The CO2 liquid storage tank can store CO2 liquid at low temperature and high pressure. The low-temperature CO2 liquid in the CO2 liquid storage tank flows into each chemical battery compartment through the CO2 liquid circulation pump, absorbing the heat generated by the energy storage operation and maintaining the low-temperature safe operation of the battery pack. The CO2 gas that has absorbed heat and evaporated returns to the gas-liquid separator of the CO2 centralized cooling system, and then transforms into CO2 liquid in the condenser tube of the heat exchanger before returning to the CO2 liquid storage tank.

[0007] Preferably, the chemical battery compartment is equipped with cooling and fire-fighting pipelines that are connected to each battery pack. The inlet of the cooling and fire-fighting pipeline is connected to the liquid inlet pipe, and the outlet of the cooling and fire-fighting pipeline is connected to the reflux pipe. The fire control module includes a composite detector for detecting carbon dioxide and combustible gas concentrations installed in the chemical battery compartment, multiple sprinklers installed on the top of the compartment, and an electric control valve installed between the sprinkler connecting pipes and the cooling and fire protection pipelines. The composite detector is used to open the electrically controlled valve when the CO2 gas concentration in the chamber is below the fire-fighting requirement, and to close the electrically controlled valve when the CO2 gas concentration in the chamber reaches the fire-fighting requirement. This directly cools each battery pack in the chemical battery compartment, ensuring the safe operation of each battery pack. The detector also controls the opening and closing of the electrically controlled valve based on the carbon dioxide concentration, supplementing the CO2 gas concentration to maintain an asphyxiating fire-fighting environment within the chemical battery compartment when the concentration is insufficient.

[0008] Preferably, the chemical battery compartment is equipped with multiple electrically operated pressure relief valves. These valves are used to release flammable gases from the chemical battery compartment and can also release CO2 gas during maintenance, ensuring the safety of maintenance personnel.

[0009] As an improvement, a breather valve is provided on the battery pack casing. During normal operation of the battery pack, external gas can enter the battery pack, keeping the internal environment of the battery pack consistent with that of the battery compartment, preventing deformation of the battery pack casing, and simultaneously achieving dual fire protection functions at both the pack and compartment levels.

[0010] As an improvement, the battery pack can be an air-cooled battery pack, a bottom liquid-cooled plate battery pack, or an immersed liquid-cooled battery pack. This system is applicable to various types of battery packs.

[0011] As an improvement, the nozzle is an atomizing nozzle. An atomizing nozzle can atomize liquid CO2, increasing the heat exchange area and thus rapidly vaporizing it, achieving the purpose of rapid cooling and increasing the CO2 gas concentration.

[0012] As an improvement, the chemical battery compartment is equipped with several rows of battery packs, each row containing several battery packs, and each battery pack has a nozzle above it. This provides cooling protection for each battery pack and creates a CO2 gas envelope between the battery packs, thus better achieving the purpose of fire prevention. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of the asphyxiation fire suppression system for the chemical battery compartment of this application.

[0014] Figure 2 This is a schematic diagram of the piping structure inside the chemical battery compartment of this application.

[0015] Figure 3 This is a front view of the chemical battery compartment of this application.

[0016] Figure 4 This is a schematic diagram of the fire control system in this application.

[0017] Figure 5 This is a schematic diagram of the battery pack structure of this application. Detailed Implementation

[0018] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] This preferred embodiment is, for example Figure 1The diagram shows an asphyxiation-type fire suppression system for a chemical battery compartment, comprising: several chemical battery compartments 1 for energy storage, the compartments being filled with CO2 gas at a concentration required for fire suppression; a centralized CO2 cooling system 2 for centrally supplying liquid CO2 and recovering CO2 liquid-gas mixtures; the centralized CO2 cooling system 2 being connected to each chemical battery compartment 1 to form a CO2 liquid-gas circulation pipeline; a fire control module being installed inside each chemical battery compartment, the fire control module being connected to the CO2 liquid-gas circulation pipeline, the fire control module being used to fill the compartment space with CO2 gas at a concentration required for fire suppression to create an oxygen-deficient environment inside the compartment. A centralized CO2 cooling system 2 is adopted, using liquid CO2 as a refrigerant to provide cooling energy to the battery packs 11 in several chemical battery compartments 1, thereby ensuring the safe operation of the energy storage in the chemical battery compartments 1. The fire control module is used to fill the space inside the compartment with CO2 gas. The sealed chemical battery compartment 1 is pre-filled with CO2 gas at the concentration required for fire protection, so that the oxygen content inside the compartment is below a certain safe value (such as oxygen concentration below 15%), achieving the effect of "suffocation". This ensures that the chemical battery compartment 1 is always in a fire-fighting state throughout its entire life cycle. The centralized CO2 cooling system 2 includes a CO2 liquid storage tank 21, a CO2 liquid circulation pump 22, a gas-liquid separator 23, a heat exchanger 24, and a refrigeration unit 25. The CO2 liquid circulation pump 22 is installed on the supply pipe of the CO2 liquid storage tank 21, which is connected to the inlet pipe of each chemical battery compartment 1. The return pipe of each chemical battery compartment 1 is connected to the gas-liquid separator 23. A pressure balance pipe connects the gas-liquid separator 23 and the CO2 liquid storage tank 21. The condenser tube of the heat exchanger 24 is connected to the return pipe between the gas-liquid separator 23 and the CO2 liquid storage tank 21. The evaporator tube of the heat exchanger 24 is circulatedly connected to the refrigeration unit 25, and a throttling valve 26 is installed on the connecting pipe. Multiple chemical battery compartments 1 are centrally configured for cooling, utilizing CO2 phase change cooling, which can reduce energy consumption and equipment investment costs.

[0021] The chemical battery compartment 1 is as follows Figure 2 and Figure 4As shown, a cooling and fire-fighting pipeline 12 is provided, connected to each battery pack 11. The inlet of the cooling and fire-fighting pipeline 12 is connected to the liquid inlet pipe, and the outlet of the cooling and fire-fighting pipeline 12 is connected to the return pipe. The fire control module includes a composite detector 13 installed in the chemical battery compartment 1 for detecting carbon dioxide and combustible gas concentrations, multiple nozzles 14 installed on the top of the compartment, and an electric control valve 15 installed between the connecting pipe of the nozzles 14 and the cooling and fire-fighting pipeline 12. The composite detector 13 is used to open the electric control valve 15 when the CO2 gas concentration in the compartment is not sufficient for fire protection, and to close the electric control valve 15 when the CO2 gas concentration in the compartment is sufficient for fire protection. Preferably, the chemical battery compartment 1 has several rows of battery packs 11, each row of battery packs 11 has several battery packs 11, and each battery pack 11 has a nozzle 14 above it. Among them, the composite detector 13 adopts a gas detector such as CN218825783U, and uses the central control module of the gas detector as the control unit for fire-fighting trigger conditions to keep the chemical battery compartment 1 in fire-fighting status at all times.

[0022] like Figure 3 and Figure 4 As shown, the chemical battery compartment 1 is equipped with multiple electrically operated pressure relief valves 16. These valves maintain the ambient pressure inside and outside the compartment (similar to a one-way check valve), eliminating the need for additional sensors to monitor the internal pressure. During equipment maintenance, the electrically operated pressure relief valves 16 release CO2 from the compartment, ensuring the safety of maintenance personnel. After maintenance is completed, CO2 continues to be released via the electrically controlled valve 15, maintaining a fire-fighting status throughout the compartment.

[0023] like Figure 5 As shown, the battery pack 11 inside the chemical battery compartment 1 is equipped with a breather valve 17 on its shell. During normal operation of the battery pack 11, external gas can enter the battery pack 11 through the breather valve 17, keeping the internal state of the battery pack 11 consistent with the internal environment of the chemical battery compartment 1, preventing deformation of the battery pack 11's shell, and simultaneously achieving dual fire protection functions at both the pack and compartment levels.

[0024] In this embodiment, the battery pack 11 can be an air-cooled battery pack, a bottom liquid-cooled plate battery pack, or an immersed liquid-cooled battery pack.

[0025] As an improvement, the nozzle 14 is an atomizing nozzle. The atomizing nozzle can atomize the CO2 liquid, expand the heat exchange area, and then rapidly vaporize it through phase change, thereby achieving the purpose of rapid cooling and increasing the CO2 gas concentration.

[0026] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A suffocation-type fire suppression system for chemical battery compartments, comprising a plurality of chemical battery compartments, characterized in that, It also includes a centralized CO2 cooling system for centrally supplying liquid CO2 and recovering CO2 liquid-gas mixtures; The centralized CO2 cooling system is connected to each chemical battery compartment to form a CO2 liquid-gas circulation pipeline. The chemical battery compartment is equipped with a fire control module, which is connected to a CO2 liquid-gas circulation pipeline. The fire control module is used to fill the compartment with CO2 gas at the required concentration to create an oxygen-deficient environment.

2. A smothering fire suppression system for a chemical battery compartment as defined in claim 1, wherein, The centralized CO2 cooling system includes a CO2 liquid storage tank, a CO2 liquid circulation pump, a gas-liquid separator, a heat exchanger, and a refrigeration unit. The CO2 liquid circulation pump is located on the supply pipe of the CO2 liquid storage tank, which is connected to the inlet pipe of each chemical cell compartment. The return pipe of each chemical cell compartment is connected to the gas-liquid separator. A pressure balance pipe is connected between the gas-liquid separator and the CO2 liquid storage tank. The condenser tube of the heat exchanger is connected to the return pipe between the gas-liquid separator and the CO2 liquid storage tank. The evaporator tube of the heat exchanger is circulatedly connected to the refrigeration unit.

3. A smothering fire suppression system for a chemical battery compartment as defined in claim 2, wherein, The chemical battery compartment is equipped with cooling and fire-fighting pipelines that are connected to each battery pack. The inlet of the cooling and fire-fighting pipelines is connected to the liquid inlet pipe, and the outlet of the cooling and fire-fighting pipelines is connected to the return pipe. The fire control module includes a composite detector for detecting carbon dioxide and combustible gas concentrations installed in the chemical battery compartment, multiple sprinklers installed on the top of the compartment, and an electric control valve installed between the sprinkler connecting pipes and the cooling and fire protection pipelines. The composite detector is used to open the electric control valve when the CO2 gas concentration in the cabin space does not meet the fire protection requirements, and to close the electric control valve when the CO2 gas concentration in the cabin space meets the fire protection requirements.

4. The asphyxiation fire suppression system for a chemical battery compartment according to claim 3, characterized in that, The chemical battery compartment is equipped with multiple electrically operated pressure relief valves.

5. The asphyxiation fire suppression system for a chemical battery compartment according to claim 3, characterized in that, The battery pack casing is equipped with a breather valve.

6. The asphyxiation fire suppression system for a chemical battery compartment according to claim 3, characterized in that, The battery pack is an air-cooled battery pack, a bottom liquid-cooled plate battery pack, or an immersed liquid-cooled battery pack.

7. The asphyxiation fire suppression system for a chemical battery compartment according to claim 3, characterized in that, The nozzle is an atomizing nozzle.

8. A suffocation-type fire suppression system for a chemical battery compartment according to any one of claims 3 to 7, characterized in that, The chemical battery compartment contains several rows of battery packs, with each row containing several battery packs, and each battery pack has a nozzle above it.

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