Energy storage fireproof protection circuit, fire suppression device and energy storage system

Abstract

The utility model provides an energy storage fireproof protection circuit, a fire suppression device and an energy storage system.The temperature of a battery cell shell is monitored through a battery management circuit, a battery cell shell overtemperature detection signal is generated when the temperature of the battery cell shell is larger than a preset temperature threshold value, and environment parameters of a battery cell are detected through a composite detection circuit; and when the environmental parameters exceed the corresponding threshold values, a parameter exceeding signal is generated. And the fire-fighting host generates an alarm control signal according to the over-temperature detection signal of the battery cell shell and / or the parameter over-standard signal, and finally generates an alarm signal according to the alarm control signal through the sound and light alarm circuit, so that a user is reminded in time.

Description

Technical Field

[0001] The present application belongs to the technical field of energy storage systems, and in particular, relates to an energy storage fire protection circuit, a fire suppression device, and an energy storage system. Background Art

[0002] At present, in the field of industrial and commercial energy storage systems, firefighting fires are often suppressed by hot aerosol or perfluorohexanone gas, usually using trigger devices such as smoke, temperature, and combustible gas. For example, when a trigger device is activated, an alarm can be issued. When any two trigger devices are activated, the fire host issues a linkage command, then the fan, shutters, etc. are turned off, the solenoid valve is opened, and the fire extinguishing medium is released, relying on the concentration to flood the fire.

[0003] Since the air ambient temperature collected by the fire temperature detector is very different from the actual temperature of the battery shell, the current fire extinguishing method often leads to a delay in the execution of fire alarm and linkage actions, delaying the initial optimal fire suppression time and reducing the fire extinguishing efficiency. Utility Model Content

[0004] The purpose of the present application is to provide an energy storage fire protection circuit, a fire suppression device, and an energy storage system, aiming to solve the problem of delayed execution of traditional fire alarm and linkage actions.

[0005] A first aspect of an embodiment of the present application provides an energy storage fire protection circuit, the energy storage fire protection circuit comprising:

[0006] A battery management circuit, used to monitor the temperature of the battery cell shell and generate a battery cell shell over-temperature detection signal when the temperature of the battery cell shell is greater than a preset temperature threshold;

[0007] A composite detection circuit, used to detect environmental parameters of the battery cell and generate a parameter exceeding signal when the environmental parameters exceed corresponding threshold values;

[0008] A fire host, connected to the battery management circuit and the composite detection circuit, and used to generate an alarm control signal according to the battery shell over-temperature detection signal and / or the parameter exceeding-limit signal;

[0009] The sound and light alarm circuit is connected to the fire host and is used to generate an alarm signal according to the alarm control signal.

[0010] In some embodiments, the composite detection circuit comprises:

[0011] An ambient temperature detection module, used to detect the ambient temperature of the battery cell to generate an ambient temperature detection signal, and to generate an ambient temperature exceeding standard signal when the ambient temperature detection signal is greater than a preset temperature threshold;

[0012] An environmental smoke detection module, used to detect the environmental smoke of the battery cell to generate an environmental smoke detection signal, and to generate an environmental smoke exceeding standard signal when the environmental smoke detection signal is greater than a preset smoke threshold;

[0013] A combustible gas detection module, used to detect the ambient combustible gas concentration of the battery cell to generate an ambient combustible gas detection signal, and to generate a combustible gas excess signal when the ambient combustible gas detection signal is greater than a preset combustible gas concentration threshold;

[0014] The fire host is also used to generate the alarm control signal when receiving any one of the ambient temperature exceeding the standard signal, the ambient smoke exceeding the standard signal, and the combustible gas exceeding the standard signal.

[0015] In some embodiments, the combustible gas detection module is further used to generate an explosion warning signal when the ambient combustible gas detection signal is greater than or equal to a preset explosion concentration threshold; the fire host is further used to generate an explosion-proof valve opening signal according to the explosion warning signal; wherein the preset explosion concentration threshold is greater than or equal to the preset combustible gas concentration threshold;

[0016] The energy storage fire protection circuit also includes:

[0017] An active explosion-proof valve is connected to the fire host and is used to start according to the explosion-proof valve opening signal and to exhaust the environment of the battery cell.

[0018] In some embodiments, the composite detection circuit further includes a logic processing module, the logic processing module is used to generate a cavity sealing control signal when receiving any two of the ambient temperature exceeding standard signal, the ambient smoke exceeding standard signal, and the combustible gas exceeding standard signal;

[0019] The active explosion-proof valve is closed according to the cavity sealing control signal to seal the environment of the battery cell;

[0020] The energy storage fire protection circuit also includes: a fire extinguishing gas control device, which performs flooding fire extinguishing suppression on a designated area according to the cavity sealing control signal.

[0021] In some embodiments, the fire extinguishing gas control device comprises:

[0022] Fire extinguishing gas storage tank, used for storing fire extinguishing gas;

[0023] A gas pipe connected to the fire extinguishing gas storage tank, the opening and closing of the gas pipe being controlled by the fire fighting host;

[0024] A first puncture valve, connected between the air pipe and the first nozzle, wherein the first puncture valve is controlled by the logic processing module;

[0025] The second puncture valve is connected between the air pipe and the second nozzle, and the second puncture valve is controlled by the logic processing module.

[0026] In some embodiments, the first nozzle is disposed in a battery compartment, the second nozzle is disposed in a battery pack, and the battery pack is disposed in the battery compartment.

[0027] In some embodiments, the number of the composite detection circuits is 2, the two composite detection circuits are respectively arranged in the battery compartment and the battery pack, and the two composite detection circuits are respectively connected to the first puncture valve and the second puncture valve in a one-to-one correspondence.

[0028] In some embodiments, the fire extinguishing gas is perfluorohexanone.

[0029] A second aspect of the embodiments of the present application further provides a fire suppression device, comprising an energy storage fire protection circuit as described in any of the above embodiments.

[0030] A third aspect of the embodiments of the present application further provides an energy storage system, comprising: a plurality of battery compartments; and an energy storage fire protection circuit as described in any of the above embodiments.

[0031] Compared with the prior art, the embodiments of the present application have the following beneficial effects: the temperature of the battery shell is monitored by the battery management circuit, and a battery shell over-temperature detection signal is generated when the temperature of the battery shell is greater than a preset temperature threshold, and a composite detection circuit is used to detect the environmental parameters of the battery, and a parameter over-limit signal is generated when the environmental parameters exceed the corresponding threshold. The fire host generates an alarm control signal according to the battery shell over-temperature detection signal and / or the parameter over-limit signal, and finally generates an alarm signal according to the alarm control signal through the sound and light alarm circuit, so as to realize timely reminder to the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0033] Figure 1 Schematic diagram of the structure of the energy storage fire protection circuit provided in the embodiment of the present application Figure 1 ;

[0034] Figure 2 Schematic diagram of the structure of the energy storage fire protection circuit provided in the embodiment of the present application Figure 2 ;

[0035] Figure 3 Schematic diagram of the structure of the energy storage fire protection circuit provided in the embodiment of the present application Figure 3 ;

[0036] Figure 4 Schematic diagram of the structure of the energy storage fire protection circuit provided in the embodiment of the present application Figure 4 ;

[0037] Figure 5 Schematic diagram of the structure of the energy storage fire protection circuit provided in the embodiment of the present application Figure 5 ;

[0038] Figure 6 Schematic diagram of the structure of the energy storage fire protection circuit provided in the embodiment of the present application Figure 6 . DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0040] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0041] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] In the field of industrial and commercial energy storage systems, firefighting fires are often suppressed by hot aerosol or perfluorohexanone gas, usually using trigger devices such as smoke, temperature, and combustible gas. When one trigger device is activated, an alarm is issued; when any two trigger devices are activated, the fire host issues a linkage command to close the fan, shutters, etc., open the solenoid valve, release the fire extinguishing medium, and rely on concentration to flood and extinguish the fire. Since the air ambient temperature collected by the fire temperature detector is very different from the actual temperature of the battery shell, the use of this fire warning method often leads to a delay in the execution of the fire alarm and linkage action, delaying the initial optimal fire suppression time and reducing the fire extinguishing efficiency.

[0044] In order to solve the above technical problems, the present application embodiment proposes an energy storage fire protection circuit, see Figure 1 As shown, the energy storage fire protection circuit in this embodiment includes: a battery management circuit 200, a fire host 100, an audible and visual alarm circuit 400, and a composite detection circuit 300, wherein the battery management circuit 200 is used to monitor the temperature of the battery shell, and generates a battery shell over-temperature detection signal when the temperature of the battery shell is greater than a preset temperature threshold, and the composite detection circuit 300 is connected to the fire host 100, and the composite detection circuit 300 is used to detect the environmental parameters of the battery, and generate a parameter exceeding signal when the environmental parameters exceed the corresponding threshold. The fire host 100 is connected to the battery management circuit 200 and the composite detection circuit 300, and the fire host 100 is used to generate an alarm control signal according to the battery shell over-temperature detection signal and / or the parameter exceeding signal, and the audible and visual alarm circuit 400 is connected to the fire host 100, and the audible and visual alarm circuit 400 is used to generate an alarm signal according to the alarm control signal.

[0045] In this embodiment, the temperature of the battery cell shell is monitored by the battery management circuit 200, and a battery cell shell over-temperature detection signal is generated when the temperature of the battery cell shell is greater than a preset temperature threshold. The composite detection circuit 300 is used to detect the environmental parameters of the battery cell, and a parameter over-limit signal is generated when the environmental parameters exceed the corresponding threshold, thereby realizing the detection of the temperature of the battery cell and the battery cell environment in the battery compartment at the same time. For example, the battery cell temperature is obtained by using the battery management system (BMS), and the shell temperature of the battery cell is obtained without increasing a large investment, which provides a way to obtain the timeliness of the fire fighting alarm and linkage action. The fire host 100 generates an alarm control signal according to the battery cell shell over-temperature detection signal and / or the parameter over-limit signal, and finally generates an alarm signal according to the alarm control signal through the sound and light alarm circuit 400 to realize timely reminder to the user.

[0046] In some embodiments, the temperature monitoring of the battery cell can be achieved through the BMS battery over-temperature dry contact. The output action temperature of the BMS battery over-temperature dry contact is 80°C. The battery management circuit 200 uses a thermistor as a temperature sampling resistor attached to the surface of the battery cell shell to achieve temperature monitoring of the battery cell shell. The temperature error is ±1%, and each battery cell is equipped with a temperature sampling resistor. This method has high temperature sampling accuracy. When the battery is over-temperature, the BMS enables its DO dry contact action and sends the signal to the fire host 100 in a timely manner through the IO module in a communication manner to complete the processing of the temperature sensing trigger signal. The shell temperature of the battery cell is obtained without increasing the investment, which provides a way to obtain the timeliness of the fire extinguishing alarm and linkage action.

[0047] In some embodiments, see Figure 2 As shown, the composite detection circuit 300 includes: an ambient temperature detection module 310, an ambient smoke detection module 320, and a combustible gas detection module 330. In this embodiment, the ambient temperature detection module 310 is used to detect the ambient temperature of the battery cell to generate an ambient temperature detection signal, and generate an ambient temperature exceeding standard signal when the ambient temperature detection signal is greater than a preset temperature threshold, the ambient smoke detection module 320 is used to detect the ambient smoke of the battery cell to generate an ambient smoke detection signal, and generate an ambient smoke exceeding standard signal when the ambient smoke detection signal is greater than a preset smoke threshold, and the combustible gas detection module 330 is used to detect the ambient combustible gas concentration of the battery cell to generate an ambient combustible gas detection signal, and generate a combustible gas exceeding standard signal when the ambient combustible gas detection signal is greater than a preset combustible gas concentration threshold. The fire host 100 is also used to generate an alarm control signal when any one of the ambient temperature exceeding standard signal, the ambient smoke exceeding standard signal, and the combustible gas exceeding standard signal is received.

[0048] In some embodiments, the ambient temperature detection module 310 may include a temperature sensor and a temperature comparator. The temperature detection sensor is used to detect the ambient temperature of the battery cell and generate a corresponding ambient temperature detection signal. The temperature detection signal may be a voltage signal, so that the temperature comparator compares the ambient temperature detection signal with a preset temperature threshold. The temperature comparator generates an ambient temperature exceeding standard signal when the ambient temperature detection signal is greater than the preset temperature threshold.

[0049] In some embodiments, the ambient smoke detection module 320 may include a smoke sensor and a smoke comparator. The smoke sensor is used to detect the ambient smoke of the battery cell and generate a corresponding ambient smoke detection signal. The smoke comparator is used to compare the ambient smoke detection signal with a preset smoke threshold and generate an ambient smoke exceedance signal when the ambient smoke detection signal is greater than the preset smoke threshold.

[0050] In some embodiments, the combustible gas detection module 330 may include a combustible gas sensor and a combustible gas comparator. The combustible gas sensor is used to detect the ambient combustible gas concentration of the battery cell and generate a corresponding ambient combustible gas detection signal. The combustible gas comparator is used to compare the ambient combustible gas detection signal with a preset combustible gas concentration threshold and generate a combustible gas excess signal when the ambient combustible gas detection signal is greater than the preset combustible gas concentration threshold.

[0051] In some embodiments, the temperature sensor, smoke sensor, and combustible gas sensor are all voltage comparators.

[0052] In some embodiments, see Figure 3 The energy storage fire protection circuit also includes an active explosion-proof valve 500 connected to the fire host 100. The active explosion-proof valve 500 is used to start according to the explosion-proof valve opening signal and exhaust the environment of the battery cell. Specifically, the combustible gas detection module 330 is also used to generate an explosion warning signal when the environmental combustible gas detection signal is greater than or equal to a preset explosion concentration threshold; the fire host 100 is also used to generate an explosion-proof valve opening signal according to the explosion warning signal; wherein the preset explosion concentration threshold is greater than or equal to the preset combustible gas concentration threshold.

[0053] In this embodiment, when the combustible gas concentration in the battery compartment exceeds the standard and reaches 25% of the lower explosion limit, the fire host 100 can control the active explosion-proof valve 500 to open, and the fan of the explosion-proof valve device is used to exhaust air to reduce the combustible gas concentration, so that the combustible gas concentration is lower than the lower explosion limit, thereby reducing the risk of combustible gas explosion.

[0054] In some embodiments, see Figure 4 As shown, the energy storage fire protection circuit also includes a fire extinguishing gas control device 600, and the composite detection circuit 300 also includes a logic processing module 340, which is used to generate a cavity sealing control signal when receiving any two of the ambient temperature exceeding the standard signal, the ambient smoke exceeding the standard signal, and the combustible gas exceeding the standard signal. The active explosion-proof valve 500 is closed according to the cavity sealing control signal to seal the environment of the battery cell. The fire extinguishing gas control device 600 performs flooding fire suppression on the designated area according to the cavity sealing control signal.

[0055] In this embodiment, when any two of the temperature, smoke concentration, and combustible gas concentration exceed the standard, the fire host 100 first issues a command to cut off the non-fire power supply and close the active explosion-proof valve 500 to seal the energy storage system space. The solenoid valve in the fire host 100 is actuated, the electric pump is started, and the gas extinguishing medium perfluorohexanone is filled with gas. The fire host 100 controls the detector to enable the detector to send an electric pulse signal to the puncture valve in the fire area. The puncture valve opens the gas pipe in the fire area, and the perfluorohexanone is sprayed through the nozzle in the fire area to suppress the fire by flooding.

[0056] In some embodiments, see Figure 5 As shown, the fire extinguishing gas control device 600 includes: a fire extinguishing gas storage tank 610, an air pipe 640, a first puncture valve 621, and a second puncture valve 622. The fire extinguishing gas storage tank 610 is used to store fire extinguishing gas, and the air pipe 640 is connected to the fire extinguishing gas storage tank 610. The opening and closing of the air pipe are controlled by the fire host 100. The first puncture valve 621 is connected between the air pipe 640 and the first nozzle 631, and the first puncture valve 621 is controlled by the logic processing module 340; the second puncture valve 622 is connected between the air pipe 640 and the second nozzle 632, and the second puncture valve 622 is controlled by the logic processing module 340.

[0057] In this embodiment, combined with Figure 5 The first puncture valve 621 and the second puncture valve 622 are respectively connected to the two branches of the trachea 640, and the first puncture valve 621 can be controlled by a logic processing module 340 in a composite detection circuit 300, and the second puncture valve 622 can be controlled by a logic processing module 340 in another composite detection circuit 300. The two composite detection circuits 300 can be respectively arranged in the battery compartment and the battery pack.

[0058] In some embodiments, the first nozzle 631 is disposed in the battery compartment, the second nozzle 632 is disposed in the battery pack, and the battery pack is disposed in the battery compartment.

[0059] In some embodiments, the number of composite detection circuits 300 is two, and the two composite detection circuits 300 are respectively arranged in the battery compartment and the battery pack, and the two composite detection circuits 300 are respectively connected to the first puncture valve 621 and the second puncture valve 622 in a one-to-one correspondence.

[0060] In some embodiments, the fire extinguishing gas is perfluorohexanone.

[0061] In one embodiment, see Figure 6As shown, the ambient temperature detection module 310, the ambient smoke detection module 320, the combustible gas detection module 330 and an output end of the battery management circuit 200 are respectively connected to the corresponding input ends of the first OR gate OR1. Through the logic processing of the first OR gate OR1, when any parameter among the ambient temperature, ambient smoke, combustible gas concentration and battery cell temperature exceeds the standard, the logic processing module 340 will generate an alarm control signal to enable the sound and light alarm to emit an alarm sound and light.

[0062] In one embodiment, in combination Figure 6 As shown, one output end of the ambient temperature detection module 310 and the ambient smoke detection module 320 is respectively connected to the corresponding input end of the first AND gate AND1, one output end of the ambient smoke detection module 320 and the combustible gas detection module 330 is respectively connected to the corresponding input end of the second AND gate AND2, and one output end of the combustible gas detection module 330 and the battery management circuit 200 is respectively connected to the corresponding input end of the third AND gate AND3. Through the logic processing of the first AND gate AND1, the second AND gate AND2 and the third AND gate AND3, when any two of the temperature, smoke concentration and combustible gas concentration exceed the standard, the logic processing module 340 generates a corresponding cavity sealing control signal, the active explosion-proof valve 500 is closed according to the cavity sealing control signal to seal the environment of the battery cell, and the fire extinguishing gas control device 600 performs flooding fire suppression on the designated area according to the cavity sealing control signal.

[0063] In one embodiment, in combination Figure 6 As shown, the output ends of the first AND gate AND1, the second AND gate AND2 and the third AND gate AND3 can be connected to the corresponding input ends of the second OR gate OR2 respectively, so that the ambient temperature detection module 310, the ambient smoke detection module 320, the combustible gas detection module 330 and the battery management circuit 200 are linked. When any two of the temperature, smoke concentration and combustible gas concentration exceed the standard, the fire host 100 first issues a command to cut off the non-fire power supply and close the active explosion-proof valve 500 to seal the energy storage system space. The solenoid valve in the host is actuated, the electric pump is started, the fire extinguishing gas control device 600 is turned on, and the gaseous fire extinguishing medium perfluorohexanone is filled with gas. The fire host 100 enables the detector, allowing the detector to send an electric pulse signal to the puncture valve in the fire area. The puncture valve opens the gas pipe in the fire area, and the perfluorohexanone is sprayed through the nozzle in the fire area to perform flooding fire suppression.

[0064] In some embodiments, the number of battery packs used in the industrial and commercial energy storage system varies according to the energy of the battery. Taking perfluorohexanone as the gas fire extinguishing medium and a battery pack as an example, the working principle of the fire suppression process is explained.

[0065] During the operation of the industrial and commercial energy storage system, the battery management system (BMS) monitors the temperature of the battery. When the temperature of the battery cell shell reaches 55°C, the system will stop charging and discharging the battery to reduce the battery temperature and ensure safe operation of the system.

[0066] If the temperature of the battery cell shell continues to rise to 80°C due to quality problems or the end of life of individual batteries after the BMS has implemented the control strategy, an abnormal over-temperature accident will occur, and the battery over-temperature DO dry contact of the BMS will be activated. The DI port of the IO module will receive this signal and send it to the fire host 100 through communication. The fire host 100 will receive it and make the sound and light alarm emit an alarm to remind the fire operation and maintenance personnel. At the same time, the composite detector will also detect the smoke and combustible gas status parameters of the energy storage system environment in real time. Once any parameter exceeds the standard, the detector will send this parameter signal to the fire host 100, and the host will enable the sound and light alarm to emit an alarm.

[0067] When the concentration of combustible gas exceeds the standard and reaches 25% of the lower explosion limit, the fire host 100 enables the DO port of the IO module to open the active explosion-proof valve 500, and the fan of the explosion-proof valve device exhausts air to reduce the concentration of combustible gas, so that the concentration of combustible gas is lower than the lower explosion limit, thereby reducing the risk of combustible gas explosion.

[0068] When any two of the temperature, smoke concentration, and combustible gas concentration exceed the standard, the fire host 100 first issues a command to cut off the non-fire power supply and close the active explosion-proof valve 500 to seal the energy storage system space. The solenoid valve in the host is activated, the electric pump is started, and the gas extinguishing medium perfluorohexanone is filled with gas. The fire host 100 enables the detector, which sends an electric pulse signal to the puncture valve in the fire area. The puncture valve opens the air pipe in the fire area and the fire extinguishing nozzle (such as Figure 5 The first nozzle 631 or the second nozzle 632) sprays perfluorohexanone to perform flooding fire extinguishing suppression.

[0069] An embodiment of the present application also provides a fire suppression device, comprising an energy storage fire protection circuit as described in any of the above embodiments.

[0070] An embodiment of the present application also provides an energy storage system, including: a plurality of battery compartments; and an energy storage fire protection circuit as described in any of the above embodiments.

[0071] In this embodiment, the energy storage system may include multiple battery compartments, and each battery compartment is provided with the energy storage fire protection circuit described in any of the above embodiments, so as to achieve the purpose of timely execution of fire alarm and linkage actions, avoid delaying the initial optimal fire suppression time, and improve the fire extinguishing efficiency.

[0072] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. An energy storage fire protection circuit, characterized in that: The energy storage fire protection circuit comprises: A battery management circuit, used to monitor the temperature of the battery cell shell and generate a battery cell shell over-temperature detection signal when the temperature of the battery cell shell is greater than a preset temperature threshold; A composite detection circuit, used to detect environmental parameters of the battery cell and generate a parameter exceeding signal when the environmental parameters exceed corresponding threshold values; A fire host, connected to the battery management circuit and the composite detection circuit, and used to generate an alarm control signal according to the battery shell over-temperature detection signal and / or the parameter exceeding-limit signal; The sound and light alarm circuit is connected to the fire host and is used to generate an alarm signal according to the alarm control signal.

2. The energy storage fire protection circuit according to claim 1, characterized in that: The composite detection circuit comprises: An ambient temperature detection module, used to detect the ambient temperature of the battery cell to generate an ambient temperature detection signal, and to generate an ambient temperature exceeding standard signal when the ambient temperature detection signal is greater than a preset temperature threshold; An environmental smoke detection module, used to detect the environmental smoke of the battery cell to generate an environmental smoke detection signal, and to generate an environmental smoke exceeding standard signal when the environmental smoke detection signal is greater than a preset smoke threshold; A combustible gas detection module, used to detect the ambient combustible gas concentration of the battery cell to generate an ambient combustible gas detection signal, and to generate a combustible gas excess signal when the ambient combustible gas detection signal is greater than a preset combustible gas concentration threshold; The fire host is also used to generate the alarm control signal when receiving any one of the ambient temperature exceeding the standard signal, the ambient smoke exceeding the standard signal, and the combustible gas exceeding the standard signal.

3. The energy storage fire protection circuit according to claim 2, characterized in that: The combustible gas detection module is also used to generate an explosion warning signal when the ambient combustible gas detection signal is greater than or equal to a preset explosion concentration threshold; the fire host is also used to generate an explosion-proof valve opening signal according to the explosion warning signal; wherein the preset explosion concentration threshold is greater than or equal to the preset combustible gas concentration threshold; The energy storage fire protection circuit also includes: An active explosion-proof valve is connected to the fire host and is used to start according to the explosion-proof valve opening signal and to exhaust the environment of the battery cell.

4. The energy storage fire protection circuit according to claim 3, characterized in that: The composite detection circuit further includes a logic processing module, which is used to generate a cavity sealing control signal when receiving any two of the ambient temperature exceeding standard signal, the ambient smoke exceeding standard signal, and the combustible gas exceeding standard signal; The active explosion-proof valve is closed according to the cavity sealing control signal to seal the environment of the battery cell; The energy storage fire protection circuit also includes: a fire extinguishing gas control device, which performs flooding fire extinguishing suppression on a designated area according to the cavity sealing control signal.

5. The energy storage fire protection circuit according to claim 4, characterized in that: The fire extinguishing gas control device comprises: Fire extinguishing gas storage tank, used for storing fire extinguishing gas; A gas pipe connected to the fire extinguishing gas storage tank, the opening and closing of the gas pipe being controlled by the fire fighting host; A first puncture valve, connected between the air pipe and the first nozzle, wherein the first puncture valve is controlled by the logic processing module; The second puncture valve is connected between the air pipe and the second nozzle, and the second puncture valve is controlled by the logic processing module.

6. The energy storage fire protection circuit according to claim 5, characterized in that: The first nozzle is disposed in a battery compartment, the second nozzle is disposed in a battery pack, and the battery pack is disposed in the battery compartment.

7. The energy storage fire protection circuit according to claim 6, characterized in that: The number of the composite detection circuits is 2, and the two composite detection circuits are respectively arranged in the battery compartment and the battery pack, and the two composite detection circuits are respectively connected to the first puncture valve and the second puncture valve in a one-to-one correspondence.

8. The energy storage fire protection circuit according to claim 5, characterized in that: The fire extinguishing gas is perfluorohexanone.

9. A fire suppression device, characterized in that: It comprises the energy storage fire protection circuit as claimed in any one of claims 1 to 8.

10. An energy storage system, characterized in that: include: Multiple battery compartments; And the energy storage fire protection circuit as claimed in any one of claims 1 to 8.

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