Energy storage system based on fire fighting

Abstract

The utility model relates to an energy storage system based on fire fighting, which comprises a battery system. A smoke exhaust pipeline system and a fire extinguishing pipeline system are respectively arranged on the battery system; the battery pack comprises a battery shell; a plurality of battery cell spacers are arranged in the battery shell and divide a closed inner cavity of the battery shell into a plurality of independent battery chambers for storing lithium iron phosphate battery cells; a communication channel is arranged in the battery shell; the communicating channel comprises a smoke collecting chamber and a medicament fire extinguishing chamber; the smoke collecting chamber is communicated with the medicament fire extinguishing chamber through a common through hole; the smoke collecting chamber and the medicament fire extinguishing chamber are respectively communicated with a smoke discharging pipeline system and a fire extinguishing pipeline system; a VOC composite detector is arranged in the closed inner cavity; the device is reasonable in design, compact in structure and convenient to use.

Description

TECHNICAL FIELD

[0001] The utility model relates to the energy storage system based on fire control. BACKGROUND

[0002] Lithium iron phosphate battery is the most widely used battery type in the current energy storage system, and its safety problem has not been completely solved, and fire and explosion accidents often occur.

[0003] In order to solve the fire and explosion accident problems in the lithium iron phosphate battery energy storage system, reduce unnecessary property and personnel losses, the utility model provides an energy storage system based on fire control, which aims to reduce or inhibit the hazards of fire in the energy storage system.

[0004] In addition, in the lithium iron phosphate battery and other energy storage systems, aerosol, heptafluoro-propane and perfluorohexanone extinguishing agent are commonly used. Among the three agents, perfluorohexanone is considered to be an ideal fire extinguishing medium because of its low toxicity, low pollution, high heat absorption capacity and large latent heat of vaporization. The known energy storage systems currently use a three-level fire control mode, i.e. battery pack level fire extinguishing, battery cabin level fire extinguishing and system level water fire extinguishing. This three-level fire control method is largely a salvage after a severe fire occurs, and requires multi-level detection, which has a large delay. At the same time, the current fire control scheme often only introduces fire control agent into the battery pack for flooding and introduces water into the battery cabin for flooding, which is often in the middle and late stages of the fire, increasing the difficulty of extinguishing the fire.

[0005] Lithium iron phosphate battery thermal runaway is often caused by single cell thermal runaway, which in turn causes a chain reaction, leading to thermal runaway fire in the entire battery pack and battery cabin. Therefore, fire prevention, detection and extinguishing should be carried out at the cell level and battery pack level.

[0006] The technical solution of the utility model mainly solves the fire extinguishing problem at the cell level, limits the fire of lithium iron phosphate battery to a single cell, prevents cell thermal runaway from spreading to the "battery pack", orderly discharges smoke and controllably extinguishes fire, thereby making the entire system safe and reliable. INVENTION CONTENTS

[0007] The technical problem to be solved by the utility model is to provide an energy storage system based on fire control. This scheme is different from the traditional PACK level and cabin level fire control, and more detailed combustible gas collection and discharge, fire control liquid spraying to the cell explosion valve, direct action to the cell with thermal runaway, more direct fire extinguishing and better effect.

[0008] To solve the above problems, the technical solution adopted by the utility model is:

[0009] The scheme effectively solves the problem that combustible gas is gathered in the battery pack and battery cabin, thereby causing a fire. The combustible gas is orderly treated and discharged, and physical cooling and oxygen isolation are assisted by fire-fighting agents, thereby fundamentally solving the safety problem of the energy storage system. The utility model provides a kind of energy storage system based on fire fighting, including battery system;Smoke exhaust pipeline system and fire extinguishing pipeline system are respectively arranged on battery system;

[0010] The battery system includes a battery cluster frame;A plurality of storage spaces are formed in the battery cluster frame, and battery packs are stored in the storage spaces;

[0011] The battery pack includes a battery shell;A plurality of cell spacers are arranged in the battery shell, which divide the closed inner cavity of the battery shell into a plurality of independent battery chambers for storing lithium iron phosphate cells;

[0012] A plurality of cell explosion-proof valves are arranged in the battery shell;

[0013] A communication passage is arranged in the battery shell;The communication passage includes a smoke collection chamber and an agent fire extinguishing chamber;The smoke collection chamber and the agent fire extinguishing chamber are communicated through a common through hole;

[0014] The smoke collection chamber and the agent fire extinguishing chamber are respectively communicated with the smoke exhaust pipeline system and the fire extinguishing pipeline system;

[0015] An open-close stopper is arranged on the battery shell, and the communication passage communicates with the corresponding battery chamber through the corresponding open-close stopper;

[0016] A VOC composite detector is arranged in the closed inner cavity.

[0017] As a further improvement of the above technical solution:

[0018] In order to improve the fire-fighting effect, a process hole coaxial with the open-close stopper is arranged in the communication passage;

[0019] In order to realize isolation and explosion-proof, the cell explosion-proof valve includes a fixed guide blind hole sleeve arranged in the process hole;A spring is arranged in the fixed guide blind hole sleeve, and a sliding guide column is connected to the outer end of the spring;There is a sealing sheet on the outer end side of the sliding guide column;

[0020] Under the action of the spring, the sliding guide column is at the open-close stopper;

[0021] The sealing sheet is sealed at the open-close stopper.

[0022] In order to realize nozzle atomization fire-fighting powder, the agent fire extinguishing chamber is connected with a fire-fighting pipeline, the fire-fighting pipeline is connected with a fire-fighting nozzle through a nozzle conversion piece;

[0023] The fire-fighting pipeline is connected with fire extinguishing pipeline A or fire extinguishing pipeline B.

[0024] In order to realize the separation of the chamber, realize the independent protection of each battery, the communication channels are arranged along the AA direction, and the communication channels are arranged along the AB direction;

[0025] An insulating protection piece is arranged below the top of the battery shell, so as to form a communication channel with the top plate of the battery shell;

[0026] An elastic sheet is arranged below the insulating protection piece;

[0027] The adjacent communication channels are communicated through the fire extinguishing pipeline C;

[0028] Each smoke collection chamber is connected through the collection pipeline A.

[0029] In order to realize the fire-fighting power supply and circulation, a fire-fighting system is further arranged on the battery system; the fire-fighting system comprises a vacuum pump, a perfluorocyclohexanone fire extinguisher and a fire-fighting water tank arranged on the top of the battery cluster frame respectively;

[0030] The perfluorocyclohexanone fire extinguisher is connected with a medicament pipeline; an electromagnetic valve I is arranged on the medicament pipeline;

[0031] The fire-fighting water tank is connected with an electromagnetic valve II through a fire-fighting water pump II;

[0032] The vacuum pump is connected with a smoke collection pipeline C;

[0033] A filter and a unloading valve are arranged on the smoke collection pipeline C;

[0034] The smoke collection pipeline C is connected with a transmitter;

[0035] A pipeline D and a pipeline E are arranged on the battery cluster frame respectively;

[0036] The transmitter is connected with the pipeline D; the pipeline D is connected with the collection pipeline A;

[0037] The medicament pipeline is connected with the pipeline E; the pipeline E is connected with the fire extinguishing pipeline A or the fire extinguishing pipeline B;

[0038] The pressure transmitter PT and / or the temperature transmitter TT are electrically connected with a controller, and the controller is electrically connected with the electromagnetic valve I and a VOC composite detector.

[0039] A one-way valve is connected with the vacuum pump.

[0040] The fire-fighting water tank has a liquid level sensor and an automatic exhaust valve.

[0041] A high-pressure tank is arranged on the battery cluster frame;

[0042] The vacuum pump is a diaphragm vacuum pump;

[0043] The transmitter comprises a pressure transmitter PT and / or a temperature transmitter TT;

[0044] In the perfluorohexanone fire extinguisher, there is a pump group I.

[0045] In order to realize the provision of more reasonable fire-fighting scheme, a fire-fighting method is provided by means of the above-mentioned fire-fighting-based energy storage system; the fire-fighting method performs the following steps:

[0046] Step one, when any one of the VOC composite detector in the battery pack detects that the combustible gas concentration value reaches the set threshold value, the VOC composite detector issues an instruction to the controller, the controller controls the vacuum pump to start, and the smoke gas is extracted through the smoke collection pipeline C, then the pressure of the transmitter rises and / or the temperature rises;

[0047] Step two, perform the fire-fighting step;

[0048] Step three, if the VOC composite detector detects that the combustible gas concentration drops to the specified threshold value, the controller enters the standby detection mode.

[0049] As a further improvement of the above technical solution:

[0050] In step two,

[0051] S2.1, when the pressure and / or temperature of the transmitter rises to the specified threshold value, it is determined that the battery cell thermal runaway stage has been entered, the controller controls the pump group I and the electromagnetic valve I to start, and the perfluorohexanone fire extinguishing liquid is sprayed to all battery packs for physical cooling and oxygen isolation;

[0052] S2.2, under the action of the medicament atomization, the internal pressure of the communication channel and the fire-fighting pipeline increases, and the combustible gas is discharged through the collection pipeline A;

[0053] In step two, when the pressure in the battery chamber is greater than the set value, the sealing sheet is pushed open and separated from the open-close stop, and the battery chamber and the communication channel are communicated.

[0054] The utility model introduces the smoke-perfluorohexanone fire extinguishing-water fire extinguishing of electric core level, three -level fire extinguishing thought, can effectively solve the safety problem of battery thermal runaway, restrain battery thermal runaway. The utility model makes full use of existing structural member, realizes the safe operation of energy storage battery under the premise of not increasing parts and cost, and has high cost performance. The utility model has wide application environment, and can be used in energy storage system and vehicle-mounted power system, and has wide application range. BRIEF DESCRIPTION OF DRAWINGS

[0055] Figure 1 It is the battery cluster axis measurement schematic diagram of the utility model.

[0056] Figure 2 It is the battery cluster main shaft measurement structure schematic diagram of the utility model.

[0057] Figure 3 is a schematic diagram of a smoke collection system and a fire extinguishing system structure of the utility model.

[0058] Figure 4 is a schematic diagram of a fire control pipeline system of the utility model.

[0059] Figure 5 is a schematic diagram of a movement path of a fire control agent of the utility model.

[0060] Figure 6 is a schematic diagram of a sealing valve structure of the utility model.

[0061] Figure 7 is a PID principle diagram of the fire control system of the utility model.

[0062] Figure 8 is a control logic diagram of the fire control system of the utility model.

[0063] Figure 9 is a schematic diagram of an electric core explosion-proof valve structure of the utility model.

[0064] Wherein: 6, battery system;7, fire extinguishing pipeline system;8, smoke exhaust pipeline system;9, fire control system;10, electric core explosion-proof valve;11, fixed guide blind hole sleeve;12, spring;13, sliding guide column;14, sealing sheet;15, fire control nozzle;16, nozzle conversion piece;17, fire control pipeline;18, VOC composite detector;19, fire extinguishing pipeline A;110, fire extinguishing pipeline B;111, fire extinguishing pipeline C;112, collection pipeline A;113, insulation protection piece;114, elastic sheet;21, lithium iron phosphate core;22, electric core spacer;23, common through hole;24, closed inner cavity;25, battery shell;26, communication channel;27, opening and closing stopper;28, agent fire extinguishing chamber;29 smoke collection chamber;31, battery pack;32, battery cluster frame;33, high pressure box;34, pipeline D;35, pipeline E;36, perfluorohexanone fire extinguisher;37, electromagnetic valve I;38, fire control water tank;39, automatic exhaust valve;310, fire control water pump II;311, electromagnetic valve II;312, smoke collection pipeline C;313, transmitter;314, filter;315, unloading valve;316, vacuum pump;317, liquid level sensor;318, check valve;319, agent pipeline. DETAILED DESCRIPTION

[0065] As Figures 1-9 shown, the energy storage system based on fire control of the embodiment mainly comprises a sealed smoke exhaust pipeline system 8, a fire extinguishing pipeline system 7, a sealing insulation assembly, a fire control system 9, a battery system 6, an electric core explosion-proof valve 10 and the like;The smoke exhaust pipeline system 8 and the fire extinguishing pipeline system 7 are respectively arranged on the battery system 6.

[0066] The battery system 6 comprises a battery cluster frame 32; a plurality of storage spaces are formed in the battery cluster frame 32, and the battery pack 31 is stored in the storage spaces;

[0067] As shown in Figure 1 , Figure 2 , the inside thereof mainly comprises battery cells, electronic components, fire-fighting pipelines, auxiliary materials and the like, and is a basic unit of the battery cluster / stack. The battery pack 31 installed in the battery cluster frame 32, the high-voltage box 33 installed at the bottom of the battery cluster frame 32, and the fire-fighting system 9 at the top form a complete battery energy storage system. Each battery pack 31 collects flammable gas through the pipeline D 34 and sprays fire-fighting agent through the pipeline E 35.

[0068] The battery pack 31 comprises a battery shell 25; a plurality of battery cell spacers 22 are arranged in the battery shell 25, and the closed inner cavity 24 of the battery shell 25 is divided into a plurality of independent battery chambers for storing lithium iron phosphate battery cells 21;

[0069] As shown in Figure 6 , in the battery pack 31, the battery cell spacer 22 provides thermal isolation between the lithium iron phosphate battery cells 21. The common through hole 23 is used by the smoke collection chamber 29 and the agent fire extinguishing chamber 28. This design is to facilitate the entry of fire-fighting agent into the flammable gas generation area, and to use the pressure of the fire-fighting agent mist to discharge the flammable gas mixture.

[0070] A plurality of battery cell explosion-proof valves 10 are arranged in the battery shell 25;

[0071] As shown in Figures 1-6 , the battery cell explosion-proof valve 10 comprises a fixed guide blind hole sleeve 11, a spring 12, a sliding guide column 13 and a sealing sheet 14. The fixed guide blind hole sleeve 11 and the sliding guide column 13 provide a sliding guide rail, the spring 12 provides a pre-tightening force, and the sealing sheet 14 realizes sealing. The structure mainly acts on the explosion-proof valve of the battery cell, and a certain pre-tightening force is applied by the spring to press the aluminum valve sheet at the battery cell explosion-proof valve, thereby realizing the secondary sealing of the battery cell. In this way, the smoke and liquid discharge channels of each battery cell can be independent of each other, thereby reducing the influence of flammable gas and electrolyte on adjacent battery cells.

[0072] A communication passage 26 is arranged in the battery shell 25; the communication passage 26 comprises a smoke collection chamber 29 and an agent fire extinguishing chamber 28; the smoke collection chamber 29 and the agent fire extinguishing chamber 28 are communicated through the common through hole 23;

[0073] The smoke collection chamber 29 and the agent fire extinguishing chamber 28 are respectively communicated with the smoke discharge pipeline system 8 and the fire extinguishing pipeline system 7;

[0074] An opening and closing stopper 27 is arranged on the battery shell 25, and the communication passage 26 communicates with the corresponding battery chamber through the corresponding opening and closing stopper 27;

[0075] The VOC composite detector 18 is arranged in the closed inner cavity 24.

[0076] The process hole coaxial with the opening and closing stop 27 is arranged in the communication channel 26.

[0077] The electric cell explosion-proof valve 10 comprises a fixed guide blind hole sleeve 11 arranged in the process hole; a spring 12 is arranged in the fixed guide blind hole sleeve 11, and a sliding guide column 13 is connected to the outer end of the spring 12; and a sealing sheet 14 is arranged at the outer end side of the sliding guide column 13.

[0078] Under the action of the spring 12, the sliding guide column 13 is at the opening and closing stop 27.

[0079] The sealing sheet 14 is sealed at the opening and closing stop 27.

[0080] The medicament fire extinguishing chamber 28 is connected with the fire extinguishing pipeline 17, the fire extinguishing pipeline 17 is connected with the fire extinguishing nozzle 15 through the nozzle conversion piece 16.

[0081] As Figures 1-4 , the fire extinguishing nozzle 15 can realize the 45° angle atomization injection of the fire extinguishing agent, which is opposite to the sealing sheet, so as to generate the forward downward force, so that the agent is better diffused and enters the inner cavity. The nozzle conversion piece 16 realizes the connection of the nozzle and the pipeline 17. The fire extinguishing pipeline 17, the VOC composite detector 18 can detect the concentration of combustible substances such as CO, H2 or electrolyte, as a judgment signal for starting fire extinguishing. Once thermal runaway occurs in a certain electric cell, high-pressure and high-temperature gas will break through the sealing sheet 14, and the sliding guide column 1 will enter the closed chamber, and the VOC composite detector 18 will timely detect the concentration of combustible substances, so as to give an early warning in the first time.

[0082] The fire extinguishing pipeline 17 is connected with the fire extinguishing pipeline A 19 or the fire extinguishing pipeline B 110.

[0083] As Figures 1-4 , the fire extinguishing pipeline A 19, the fire extinguishing pipeline B 110 and the fire extinguishing pipeline C 111 are made of SUS201 and are used for spraying fire extinguishing agent. The combustible gas collecting pipeline A 111 and the insulation protection piece 112 are used for collecting combustible gas.

[0084] The communication channel 26 is arranged along the AA direction, and the communication channel 26 is arranged along the AB direction.

[0085] The insulation protection piece 113 is arranged below the top of the battery shell 25, so as to seal the communication channel 26 with the top plate of the battery shell 25.

[0086] As Figures 1-5, insulation protection 113 for insulation protection between metal parts and battery cell. Elastic sheet 114, made of silica gel, is used to realize the sealing between the battery cell and the explosion-proof valve 10, which has high temperature resistance and flame retardant performance.

[0087] Elastic sheet 114 is arranged below the insulation protection 113;

[0088] The adjacent communication channels 26 are connected through the fire extinguishing pipeline C111;

[0089] Each smoke collection chamber 29 is connected through the collection pipeline A112.

[0090] The battery system 6 is also provided with a fire extinguishing system 9; the fire extinguishing system 9 includes a vacuum pump 316, a perfluorocyclohexanone fire extinguisher 36 and a fire water tank 38 arranged at the top of the battery cluster frame 32 respectively;

[0091] The perfluorocyclohexanone fire extinguisher 36 is connected with the medicament pipeline 319; the electromagnetic valve I 37 is arranged on the medicament pipeline 319;

[0092] The fire water tank 38 is connected with the electromagnetic valve II 311 through the fire water pump II 310;

[0093] The smoke collection pipeline C312 is connected with the vacuum pump 316;

[0094] The filter 314 and the unloading valve 315 are arranged on the smoke collection pipeline C312;

[0095] The smoke collection pipeline C312 is connected with the transmitter 313;

[0096] The pipeline D34 and the pipeline E35 are arranged on the battery cluster frame 32 respectively;

[0097] The transmitter 313 is connected with the pipeline D34; the pipeline D34 is connected with the collection pipeline A112;

[0098] The medicament pipeline 319 is connected with the pipeline E35; the pipeline E35 is connected with the fire extinguishing pipeline A19 or the fire extinguishing pipeline B110;

[0099] The pressure transmitter PT and / or the temperature transmitter TT are electrically connected with the controller, and the controller is electrically connected with the electromagnetic valve I 37 and the VOC composite detector 18.

[0100] As shown by the arrow in the middle, Figure 4 When the combustible gas is collected in the middle sealing cavity, it is orderly discharged to the outside of the battery pack after passing through the VOC composite detector, and is collected through the external pipeline. In this way, the disorderly diffusion of combustible gas or electrolyte in the battery pack can be avoided, thereby reducing the thermal influence of the thermal runaway battery cell on the adjacent battery cell. Good sealing between the battery cells can reduce the possibility of igniting the combustible gas by electric sparks, further enhancing the safety performance.

[0101] As Figure 5 The fire-fighting agent is sprayed into the position as shown by the arrow, and is sprayed to the top of the thermal runaway battery cell to cool the battery cell source and isolate oxygen, thereby achieving the effect of timely fire extinguishing. In addition, the utility model creatively adopts the design of smoke collection and fire-fighting and fire extinguishing common pipelines, when thermal runaway occurs, the fire-fighting agent is sprayed while the smoke is collected, combustible gas is discharged through the atomization pressure generated by the agent, thereby isolating the remaining oxygen in the space.

[0102] The one-way valve 318 is connected to the vacuum pump 316.

[0103] The fire water tank 38 is provided with a liquid level sensor 317 and an automatic exhaust valve 39.

[0104] The high-pressure tank 33 is arranged on the battery cluster frame 32.

[0105] The vacuum pump 316 is a diaphragm vacuum pump.

[0106] The transmitter 313 includes a pressure transmitter PT and / or a temperature transmitter TT.

[0107] The pump group I is arranged in the perfluorohexanone fire extinguisher 36.

[0108] As Figures 1-3 As shown, the perfluorohexanone fire extinguisher 36 is provided with a perfluorohexanone agent pipeline 319 connected with a perfluorohexanone agent and a booster pump. The solenoid valve I 37 is arranged on the perfluorohexanone agent pipeline 319, and is used for controlling the spraying of the perfluorohexanone agent.

[0109] The fire water tank 38 stores about 8-10 kg of fire water. The automatic exhaust valve 39 is used to balance the pressure inside and outside the fire water tank. The liquid level sensor 317 is arranged on the fire water tank 38, and detects the liquid level of the fire water tank. When the liquid level is insufficient, it prompts to replenish water in time. The fire water pump II 310 is connected to the fire water tank 38, and provides fire water pressure. The solenoid valve II 311 controls the release of the fire water. The fire water tank 38 can be connected in series with the municipal water tank to keep the water level sufficient all year round. The above constitutes a fire-fighting and fire extinguishing system.

[0110] Temperature pressure integrated transmitter 313, installed on the smoke collection pipeline C312. For detecting the temperature and pressure of the flammable gas on the smoke collection pipeline, as the judgment signal of the fire extinguishing agent starting to spray. Filter 314, for filtering and adsorbing particles, impurities and organic electrolyte in the flammable gas, to prevent the vacuum pump 316 from being blocked. The unloading valve 315 is used to ensure that the pipeline operates at rated pressure, and the unloading valve releases the pressure in time once the internal pressure rises due to blockage in the pipeline. Diaphragm vacuum pump 316, for extracting flammable gas and discharging it outside the pipeline in time. One-way valve 318, which only allows gas to be discharged in one direction and does not allow external gas or electric sparks to enter. The above configuration is a smoke collection system.

[0111] In this way, the above constitutes a smoke collection system and a fire extinguishing system.

[0112] The fire extinguishing method of the embodiment is based on the above-mentioned energy storage system based on fire extinguishing; the fire extinguishing method performs the following steps:

[0113] Step one, when any one of the battery packs 31 detects that the VOC composite detector 18 detects that the flammable gas concentration value reaches the set threshold value, the VOC composite detector 18 issues an instruction to the controller, and the controller controls the vacuum pump 316 to start, through the smoke collection pipeline C312 to extract smoke gas, and the transmitter 313 pressure rises and / or temperature rises;

[0114] Step two, perform the fire extinguishing step;

[0115] Step three, if the VOC composite detector 18 detects that the flammable gas concentration drops to the specified threshold value, the controller enters the standby detection mode.

[0116] In step two,

[0117] S2.1, when the pressure and / or temperature of the transmitter 313 rises to the specified threshold value, it is determined that the battery cell has entered the thermal runaway stage, and the controller controls the pump group I and the electromagnetic valve I37 to start, and sprays perfluorohexone fire extinguishing liquid into all battery packs 31, and performs physical cooling and oxygen isolation;

[0118] S2.2, under the action of the agent atomization, the internal pressure of the communication channel 26 and the fire extinguishing pipeline 17 increases, and the collection pipeline A112 discharges the flammable gas;

[0119] In step two, when the internal pressure of the battery chamber is greater than the set value, the sealing piece 14 is pushed away from the open-close stop 27, and the battery chamber is connected to the communication channel 26.

[0120] As Figure 7As shown, there are mainly perfluorohexanone fire extinguishing device, pump group I, electromagnetic valve I, fire water tank, liquid level sensor, automatic breather valve, pump group II, electromagnetic valve II, battery pack, VOC composite detector, temperature and pressure integrated transmitter, filter, safety valve, diaphragm vacuum pump, check valve, pipeline, etc. The gas circuit, fire extinguishing agent and fire water are designed as a common pipeline in the battery pack.

[0121] As shown in the control logic diagram of the fire extinguishing pipeline system. Figure 8 When the VOC composite detector in any one of the seven battery packs detects that the combustible gas concentration value reaches the set threshold value, an instruction is issued to the controller, the controller controls the diaphragm vacuum pump to start, extracts the gas in the smoke collection pipeline, the temperature and pressure integrated transmitter increases the pressure and temperature. When the pressure or temperature rises to the specified threshold value, it is determined that the battery cell has entered the thermal runaway stage, the controller controls the pump group I and electromagnetic valve I to start, and the perfluorohexanone fire extinguishing liquid is sprayed to the seven battery packs for physical cooling and oxygen isolation. Under the action of the agent atomization, the pressure in the pipeline increases, and the combustible gas is discharged. If the VOC composite detector detects that the combustible gas concentration decreases to the specified threshold value, it enters the standby detection mode. Once the VOC composite detector detects that the combustible gas concentration rises to the specified threshold value, the pump group II and electromagnetic valve II are started to extinguish the fire with fire water for further physical cooling.

[0122] The utility model increases the cost of battery in small scale, increases the difficulty of manufacturing technology, and innovatively puts forward the double fire extinguishing idea of battery cell level. Through the utility model, each battery cell can be effectively formed into independent physical isolation, and the combustible gas and electrolyte spreading from one battery cell thermal runaway to adjacent battery cells can be avoided. A combustible gas collection channel shared by multiple battery packs is constructed to collect combustible gas and extract it to the outside of the battery to avoid the accumulation of combustible gas in the battery. The built-in VOC composite detector detects the battery cell thermal runaway signal in the first time, thereby achieving low-delay fire extinguishing.

[0123] The smoke collection and fire extinguishing agent common pipeline design in the battery pack, the pressure of the fire extinguishing agent atomization and spraying can discharge the combustible gas, thereby isolating oxygen.

[0124] The temperature and pressure transmitters built in the smoke exhaust pipeline further increase the judgment signal of fire extinguishing start to prevent misoperation. The smoke exhaust pipeline has redundant safety design such as filtration and pressure relief.

[0125] The utility model discloses adopt smoke -full fluorine hexanone fire -extinguishing -water fire -extinguishing, three -level fire -extinguishing. From the fire disaster source of electric core level carries out fire extinguishing, introduces the fire -extinguishing agent directly to the electric core explosion -proof valve, improves the time -effect and effect of fire extinguishing. Full fluorine hexanone as main fire -extinguishing agent participates in fire extinguishing, and water as final fire -extinguishing line. Through the ingenious control logic, optimize the fire control process, realize safe, fast response, introduce the physical isolation of electric core level and fire -extinguishing, realize that fire -extinguishing is thorough, avoids diffusion, through the creative design smoke collection pipeline and double -way fire -extinguishing management, two common pipeline designs, realize the reasonable use of pressure, thereby in the limited design space, realize the full use of pipeline, reduce energy consumption.

[0126] The pipeline design form of the utility model is not limited to the above-mentioned 7 parallel forms, and 7 or more battery packs can be designed to have smoke exhaust pipelines and fire extinguishing pipelines, and multiple electromagnetic valves can be used to realize fire extinguishing agent spraying of a single battery pack and smoke exhaust of the single battery pack. The main consideration is the fire extinguishing effect and product cost.

[0127] The valve and the part of the utility model are not limited to the forms described in the text, and some other auxiliary valves and detectors can be added to realize higher precision control and achieve safer effects.

[0128] The utility model is fully described to make the disclosure clearer, and the prior art is not listed one by one.

[0129] Finally, it should be pointed out that: the above examples are only used to illustrate the technical solutions of the utility model, and are not limited thereto; although the utility model has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; as a person skilled in the art, it is obvious to combine multiple technical solutions of the utility model. These modifications or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solutions of the utility model embodiments. The technical content not described in the utility model is known technology.

Claims

1. A fire-based energy storage system, characterized by: The battery system (6) is provided with an exhaust pipe system (8) and a fire extinguishing pipe system (7) respectively; The battery system (6) comprises a battery cluster frame (32), and a plurality of storage spaces are formed in the battery cluster frame (32), and a battery pack (31) is stored in each storage space; The battery pack (31) comprises a battery shell (25), a plurality of cell spacers (22) are arranged in the battery shell (25), and the closed inner cavity (24) of the battery shell (25) is divided into a plurality of independent battery chambers for storing lithium iron phosphate cells (21); A plurality of cell explosion-proof valves (10) are arranged in the battery shell (25); A communication passage (26) is arranged in the battery shell (25), the communication passage (26) comprises a smoke collection chamber (29) and a chemical fire extinguishing chamber (28), and the smoke collection chamber (29) and the chemical fire extinguishing chamber (28) are communicated through a common through hole (23); The smoke collection chamber (29) and the chemical fire extinguishing chamber (28) are respectively communicated with the exhaust pipe system (8) and the fire extinguishing pipe system (7); An opening and closing stop (27) is arranged on the battery shell (25), and the communication passage (26) communicates with the corresponding battery chamber through the corresponding opening and closing stop (27); A VOC composite detector (18) is arranged in the closed inner cavity (24).

2. The fire-based energy storage system of claim 1, wherein: A process hole coaxial with the opening and closing stop (27) is arranged in the communication passage (26); The cell explosion-proof valve (10) comprises a fixed guide blind hole sleeve (11) arranged in the process hole, a spring (12) is arranged in the fixed guide blind hole sleeve (11), a sliding guide column (13) is connected to the outer end of the spring (12), and a sealing sheet (14) is arranged on the outer end side of the sliding guide column (13); Under the action of the spring (12), the sliding guide column (13) is located at the opening and closing stop (27); The sealing sheet (14) is sealed at the opening and closing stop (27).

3. The fire-based energy storage system of claim 2, wherein: The chemical fire extinguishing chamber (28) is connected with a fire-fighting pipe (17), the fire-fighting pipe (17) is connected with a fire-fighting nozzle (15) through a nozzle switching piece (16); The fire-fighting pipe (17) is connected with a fire extinguishing pipe A (19) or a fire extinguishing pipe B (110).

4. The fire-fighting based energy storage system according to claim 3, characterized in that: The communication passage (26) is arranged along the AA direction, and the communication passage (26) is distributed along the AB direction; An insulating protection piece (113) is arranged below the top of the battery shell (25), so as to seal the communication passage (26) with the top plate of the battery shell (25); Adjacent communication passages (26) are communicated through a fire extinguishing pipe C (111); Each smoke collection chamber (29) is connected with a collection pipe A (112) through an external pipe.

5. The fire-based energy storage system of claim 4, wherein: A fire-fighting system (9) is further arranged on the battery system (6), the fire-fighting system (9) comprises a vacuum pump (316), a perfluorohexone fire extinguisher (36) and a fire-fighting water tank (38) arranged on the top of the battery cluster frame (32) respectively; The perfluorohexone fire extinguisher (36) is connected with a chemical pipe (319), and an electromagnetic valve I (37) is arranged on the chemical pipe (319). The fire water tank (38) is connected with the electromagnetic valve II (311) through the fire water pump II (310); The smoke collection pipeline C (312) is connected with the vacuum pump (316); The smoke collection pipeline C (312) is connected with the transmitter (313); The pipeline D (34) and the pipeline E (35) are arranged on the battery cluster frame (32) respectively; The transmitter (313) is connected with the pipeline D (34); the pipeline D (34) is connected with the collection pipeline A (112); The medicament pipeline (319) is connected with the pipeline E (35); the pipeline E (35) is connected with the fire extinguishing pipeline A (19) or the fire extinguishing pipeline B (110).

6. The fire-based energy storage system of claim 5, wherein: The one-way valve (318) is connected with the vacuum pump (316).

7. The fire-based energy storage system of claim 5, wherein: The fire water tank (38) is provided with the liquid level sensor (317) and the automatic exhaust valve (39).

8. The fire-based energy storage system of claim 5, wherein: The pressure transmitter PT and / or the temperature transmitter TT are electrically connected with the controller; the controller is electrically connected with the electromagnetic valve I (37) and the VOC composite detector (18).

9. The fire-based energy storage system of claim 5, wherein: The filter (314) and the unloading valve (315) are arranged on the smoke collection pipeline C (312).

10. The fire-based energy storage system of claim 5, wherein: The elastic sheet (114) is arranged below the insulation protection piece (113).

Images