Fire-fighting detection method and system for battery energy storage system

Abstract

The invention provides a fire-fighting detection method for a battery energy storage system, and the method comprises the steps: receiving a first detection signal from a battery compartment detector, and the first detection signal comprises one or more of the temperature, smoke concentration and combustible gas concentration of a battery compartment; receiving a second detection signal from the battery management system, wherein the second detection signal is the temperature of each battery monomer of each battery pack assembly collected by each battery management unit; and triggering corresponding fire fighting measures according to the first detection signal and / or the second detection signal. According to the invention, multiple monitoring of the battery management system and the battery compartment detector is utilized, and an intelligent early warning mechanism is combined, so that a hierarchical fire safety protection system is constructed in the battery energy storage system; a traditional fire-fighting detection mode is replaced by battery management system data and temperature acquisition, and when an abnormality occurs, an early warning, fire alarm or fire extinguishing mechanism can be automatically triggered according to a preset condition; therefore, the stability and the reliability of the system are greatly improved, and the cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of power energy storage technology, and more particularly to a fire detection method and system for a battery energy storage system. Background Art

[0002] Battery energy storage systems used in the power sector have experienced rapid growth in recent years, offering significant advantages for efficient energy utilization and grid peak and frequency regulation. With the widespread adoption of energy storage devices, fire incidents within these systems have drawn significant attention. When batteries within these devices are subjected to various abuses, such as overheating, overcharging, over-discharging, shock, compression, or internal or external short circuits, chemical reactions within the battery materials can trigger thermal runaway, ultimately leading to safety incidents such as fire or explosion. Therefore, fire detection is essential.

[0003] In the prior art, one method is to judge the thermal runaway of the battery by placing a two-in-one (temperature, CO) / three-in-one (temperature, CO, VOC) composite detector inside the battery pack, and then link the fire protection system. When using the method of placing a composite detector inside the battery pack to judge the thermal runaway of the battery cell, since the battery pack is currently sealed with silicone foam, and silicone oil paper is used between the battery cell and the liquid cooling plate, when the integrated cabinet is in operation for a long time, organic compounds VOC and CO will be emitted, which will cause false alarms of the sensor and cause a series of losses. Even if the sensor is replaced or the battery pack is opened for ventilation as soon as possible, the same problem will occur after a while and cannot be effectively suppressed. Another method is to place a small capacity of aerosol fire extinguishing agent directly inside the battery pack, and start it automatically through temperature sensing. After the temperature reaches the starting point / 170°, the thermal wire is burned to drive the fire extinguishing. By placing a small amount of hot aerosol directly in the battery pack to determine thermal runaway and extinguish the fire, the aerosol's activation principle is that when the temperature in the battery pack reaches 170°, the aerosol's thermistor wire will burn, generating sparks, which will then detonate the aerosol, and the aerosol will release gas to extinguish the fire. However, the thermistor wire itself is the source of fire. If the thermistor wire burns before the battery pack loses control and catches fire, it will cause thermal runaway in the battery pack in advance, which is extremely risky. Another point is that the thermistor wire is limited in length, and the temperature measurement points in the battery pack are also limited. It is very likely that the first point of thermal runaway will not be collected, and there is a risk of lag.

[0004] Based on this, a new solution is needed. Summary of the Invention

[0005] The purpose of the present invention is to provide a fire detection method and system for a battery energy storage system.

[0006] According to one aspect of the present invention, a fire detection method for a battery energy storage system is provided, comprising the following steps:

[0007] receiving a first detection signal from a battery compartment detector disposed in the battery compartment, the first detection signal including one or more of a temperature, a smoke concentration, and a combustible gas concentration of the battery compartment;

[0008] receiving a second detection signal from a battery management system, the battery management system communicating with each battery management unit provided in each battery pack assembly via a daisy chain manner, the second detection signal being a temperature of each battery cell in each battery pack assembly collected by each battery management unit;

[0009] Corresponding fire-fighting measures are triggered according to the first detection signal and / or the second detection signal.

[0010] In the fire detection method for a battery energy storage system provided by the present invention, the step of triggering corresponding firefighting measures according to the first detection signal and / or the second detection signal includes:

[0011] When the temperature of the battery compartment exceeds a first temperature threshold, or the smoke concentration exceeds a first smoke concentration threshold, or the combustible gas concentration exceeds a first combustible gas concentration threshold, or the temperature change value of the battery compartment exceeds a first temperature change threshold, a warning signal is generated and sent to a fire protection module;

[0012] Under the control of the early warning signal, the ventilation system of the fire-fighting module is turned on for exhaust.

[0013] In the fire detection method for a battery energy storage system provided by the present invention, the step of triggering corresponding firefighting measures according to the first detection signal and / or the second detection signal includes:

[0014] When the temperature of the battery compartment exceeds the second temperature threshold, or the temperature of the battery compartment exceeds the first temperature threshold and the smoke concentration exceeds the first smoke concentration threshold, or the temperature of the battery compartment exceeds the first temperature threshold and the combustible gas concentration exceeds the first combustible gas concentration threshold, a fire alarm signal is generated and sent to the fire protection module;

[0015] Under the control of the fire alarm signal, the external water valve of the fire fighting module is opened to extinguish the fire.

[0016] In the fire detection method for a battery energy storage system provided by the present invention, the step of triggering corresponding firefighting measures according to the first detection signal and / or the second detection signal includes:

[0017] When the second detection signal satisfies a first preset condition or a second preset condition, a battery cell thermal runaway signal is generated and sent to the fire protection module, wherein the first preset condition is that one of the multiple battery cell temperatures exceeds a first cell temperature preset value and the voltage exceeds a voltage preset value, and the second preset condition is that the battery cell temperature of the same battery cell exceeds a second cell temperature preset value for more than a preset number of times within a preset time and the battery cell temperature is different each time;

[0018] Under the control of the battery cell thermal runaway signal, the fire extinguishing device of the fire fighting module is turned on to spray the fire extinguishing agent, and the ventilation system of the fire fighting module is turned on at the same time.

[0019] According to another aspect of the present invention, a fire detection system for a battery energy storage system is provided. The battery energy storage system includes a battery compartment and a plurality of battery pack assemblies disposed in the battery compartment. The fire detection system includes:

[0020] The battery compartment detector is installed in the battery compartment and is used to collect the temperature, smoke concentration and combustible gas concentration of the battery compartment:

[0021] Multiple battery management units for collecting the temperature of each battery cell in each battery pack assembly;

[0022] a battery management system, communicating with the plurality of battery management units in a daisy-chain manner and receiving battery cell temperatures from the battery management units;

[0023] A processor is electrically connected to the battery management system and the battery compartment detector, and is used to receive a first detection signal from the battery compartment detector, where the first detection signal includes one or more of the temperature, smoke concentration, and combustible gas concentration of the battery compartment, and receive a second detection signal from the battery management system, where the second detection signal is the temperature of each battery cell of each battery pack assembly collected by each battery management unit, and trigger corresponding fire-fighting measures based on the first detection signal and / or the second detection signal.

[0024] In the fire detection system for a battery energy storage system provided by the present invention, the processor is used to:

[0025] When the temperature of the battery compartment exceeds a first temperature threshold, or the smoke concentration exceeds a first smoke concentration threshold, or the combustible gas concentration exceeds a first combustible gas concentration threshold, or the temperature change value of the battery compartment exceeds a first temperature change threshold, a warning signal is generated and sent to a fire protection module;

[0026] Under the control of the early warning signal, the ventilation system of the fire-fighting module is turned on for exhaust.

[0027] In the fire detection system for a battery energy storage system provided by the present invention, the processor is used to:

[0028] When the temperature of the battery compartment exceeds the second temperature threshold, or the temperature of the battery compartment exceeds the first temperature threshold and the smoke concentration exceeds the first smoke concentration threshold, or the temperature of the battery compartment exceeds the first temperature threshold and the combustible gas concentration exceeds the first combustible gas concentration threshold, a fire alarm signal is generated and sent to the fire protection module;

[0029] Under the control of the fire alarm signal, the external water valve of the fire fighting module is opened to extinguish the fire.

[0030] In the fire detection system for a battery energy storage system provided by the present invention, the processor is used to:

[0031] When the second detection signal satisfies a first preset condition or a second preset condition, a battery cell thermal runaway signal is generated and sent to the fire protection module, wherein the first preset condition is that one of the multiple battery cell temperatures exceeds a first cell temperature preset value and the voltage exceeds a voltage preset value, and the second preset condition is that the battery cell temperature of the same battery cell exceeds a second cell temperature preset value for more than a preset number of times within a preset time and the battery cell temperature is different each time;

[0032] Under the control of the battery cell thermal runaway signal, the fire extinguishing device of the fire fighting module is turned on to spray the fire extinguishing agent, and the ventilation system of the fire fighting module is turned on at the same time.

[0033] The fire detection method and system for a battery energy storage system implemented in the present invention have the following beneficial effects: The present invention utilizes multiple monitoring functions of the battery management system and battery compartment detectors, combined with an intelligent early warning mechanism, to establish a hierarchical fire safety protection system within the battery energy storage system. By real-time monitoring of multiple parameters such as temperature, smoke, and gas concentrations, and utilizing battery management system (BMS) data and temperature collection to replace traditional fire detection methods, when an anomaly occurs, early warning, fire alarm, or fire extinguishing mechanisms can be automatically triggered according to preset conditions. This significantly improves the system's stability and reliability while reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only embodiments of the present invention. Those skilled in the art can also derive other drawings based on the provided drawings without inventive work.

[0035] Figure 1The figure shows a flow chart of a fire detection method for a battery energy storage system proposed by the present invention. DETAILED DESCRIPTION

[0036] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The drawings illustrate exemplary embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0038] Figure 1 The figure shows a flow chart of a fire detection method for a battery energy storage system proposed by the present invention. Figure 1 As shown, the fire detection method for a battery energy storage system provided by the present invention includes the following steps:

[0039] Step S1, receiving a first detection signal from a battery compartment detector, wherein the battery compartment detector is disposed in the battery compartment, the first detection signal including one or more of a temperature, a smoke concentration, and a combustible gas concentration of the battery compartment;

[0040] Specifically, in one embodiment of the present invention, a battery energy storage system includes a battery compartment. A battery compartment detector installed within the compartment monitors the compartment's temperature, smoke concentration, and combustible gas concentration. The monitoring signals from the battery compartment can effectively identify abnormal conditions within the battery, particularly changes in temperature, smoke, and combustible gas concentrations, which can be precursors to battery thermal runaway.

[0041] Step S2: receiving a second detection signal from a battery management system, wherein the battery management system communicates with each battery management unit provided in each battery pack assembly via a daisy chain, wherein the second detection signal is the temperature of each battery cell in each battery pack assembly collected by each battery management unit;

[0042] Specifically, in one embodiment of the present invention, the battery energy storage system also includes a plurality of battery pack assemblies arranged in the battery compartment, and each battery pack assembly includes a plurality of battery cells. The temperature change of the battery cell is the most effective basis for judging whether the battery cell has thermal runaway. By collecting these temperature data, anomalies can be discovered in advance and large-scale safety accidents can be prevented. Each battery pack assembly is responsible for collecting the temperature of its battery cell by the battery management unit (BMU). For example, if a battery pack assembly has 8 battery cells, each battery pack assembly has 8 battery cell temperature collection points and 2 pole temperature collection points. The battery management unit communicates in a daisy chain manner and uploads the temperature data of the entire cluster of N battery cells to the battery management system. The battery management system uploads the temperature data of the entire cluster of N battery cells to the background processor via CAN.

[0043] The most consistent and first sign of thermal runaway is a temperature rise, so temperature is the most effective indicator for determining thermal runaway in a battery cell. In this embodiment, the battery management system collects temperature data from the battery cells, replacing internal fire detectors within the battery pack. This avoids false alarms and reduces firefighting costs. For example, with 16 battery packs, the battery management system has at least 128 temperature sampling points, enabling effective cell thermal runaway detection with high stability and a low risk of false alarms.

[0044] Step S3: trigger corresponding fire-fighting measures according to the first detection signal and / or the second detection signal.

[0045] Specifically, in one embodiment of the present invention, based on the collected first detection signal (from the battery compartment detector) and the second detection signal (from the battery management system), the system will determine whether to trigger firefighting measures. If the temperature, smoke concentration or combustible gas concentration of the battery compartment exceeds the set warning threshold, the system will generate a warning signal; the warning signal will trigger the ventilation system of the fire protection module to exhaust air to prevent further temperature rise. If the temperature, smoke or gas concentration exceeds the fire alarm threshold, the system will generate a fire alarm signal and open the external water valve of the fire protection module to extinguish the fire; at this time, the system has identified the existence of a fire risk and must perform fire extinguishing. When the battery management system detects an abnormal battery cell temperature (for example, the temperature exceeds the preset value or the temperature continues to rise in a short period of time), the system will generate a battery cell thermal runaway signal and trigger fire extinguishing measures. In the event of thermal runaway, the system will not only start the fire extinguishing agent spraying device, but also open the ventilation system to prevent the fire from spreading.

[0046] Specifically, in one embodiment of the present invention, when the temperature of the battery compartment exceeds a first temperature threshold, or the smoke concentration exceeds a first smoke concentration threshold, or the flammable gas concentration exceeds a first flammable gas concentration threshold, or the temperature change value of the battery compartment exceeds a first temperature change threshold, a warning signal is generated and sent to the fire protection module; under the control of the warning signal, the ventilation system of the fire protection module is activated for exhaust. For example, if the temperature value in the cabinet suddenly changes by more than 10°C / 1s; the smoke concentration is ≥500ppm; the flammable gas concentration is ≥150ppm; or the temperature is greater than 68°C, a warning signal will be triggered when any of the above conditions occurs.

[0047] Specifically, in one embodiment of the present invention, when the battery compartment temperature exceeds a second temperature threshold, or when the battery compartment temperature exceeds a first temperature threshold and the smoke concentration exceeds a first smoke concentration threshold, or when the battery compartment temperature exceeds a first temperature threshold and the combustible gas concentration exceeds a first combustible gas concentration threshold, a fire alarm signal is generated and sent to the fire fighting module; under the control of the fire alarm signal, the external water valve of the fire fighting module is opened to extinguish the fire. For example, a fire alarm signal is triggered when any of the following conditions occurs: temperature ≥ 78°C2; temperature > 68°C + smoke ≥ 500ppm; temperature > 68°C + combustible gas ≥ 150ppm.

[0048] Specifically, in one embodiment of the present invention, when the second detection signal satisfies a first preset condition or a second preset condition, a cell thermal runaway signal is generated and sent to the fire protection module. The first preset condition is that one of the multiple battery cell temperatures exceeds a first cell temperature preset value and the voltage exceeds a voltage preset value. The second preset condition is that the temperature of the same battery cell exceeds a second cell temperature preset value more than a preset number of times within a preset time, and each time the temperature is different. Under the control of the cell thermal runaway signal, the fire protection module's driven fire extinguishing device is activated to spray fire extinguishing agent, and the fire protection module's ventilation system is activated. For example, if the cell temperature at the same sampling point is detected to be greater than 65°C and the voltage is greater than 3.8V; or if the cell temperature at the same sampling point is detected to be greater than 78°C three times within 5 seconds, and each time the temperature is different, the cell is determined to be in thermal runaway, and a signal is output to the fire protection host. Upon receiving the controller signal, the fire protection host triggers the 24V driven fire extinguishing device to spray perfluorohexanone, achieving a suppression effect and resolving the hysteresis of internally placed aerosols and the danger of thermal wire combustion.

[0049] In this embodiment, once an anomaly is detected, the system automatically triggers different firefighting responses based on the detection signal: Early Warning Response: When temperature, smoke, or gas concentrations are slightly elevated, the system does not immediately initiate drastic firefighting measures. Instead, it first activates ventilation and cooling mechanisms to stabilize the system by increasing airflow or coolant flow to prevent the problem from escalating. Fire Alarm Response: If the initial signs of fire are detected, the system immediately activates fire extinguishing devices to prevent the fire from spreading. Battery Cell Thermal Runaway Response: When a battery cell experiences thermal runaway, the system quickly initiates multi-level firefighting measures, such as spraying extinguishing agents and activating exhaust systems, to extinguish the fire. Different detection signals trigger different levels of response measures, providing layered protection to prevent escalation of fire risks. Battery cell thermal runaway is one of the most dangerous conditions, so the system implements the most aggressive firefighting measures at this stage to ensure safety. The system's intelligent response mechanism avoids the false alarms that can occur in traditional firefighting solutions and effectively reduces unnecessary firefighting costs.

[0050] Traditional fire detection systems, especially those based on thermistor-activated fire extinguishing methods, are prone to false alarms or untimely responses when faced with thermal runaway of the battery system. This invention achieves more accurate fire warnings by combining the BMS (battery management system) with battery cell temperature data, directly using it as a basis for determining thermal runaway. By directly collecting the battery's operating temperature as a data source, the system can grasp the battery status in real time and respond promptly, avoiding the delays or misjudgments that may occur with thermistor wires in traditional methods. Traditional fire detection requires complex detection circuits and sensors, which have high hardware facilities and maintenance costs. By using BMS data for early warning, the demand for sensors and other hardware facilities can be significantly reduced, thereby reducing the cost of the overall fire protection system. Traditional battery energy storage systems typically use multiple components such as composite detectors, sprinklers, valve groups, and pipe networks. These devices are complex and require high construction technology, resulting in increased construction difficulty and subsequent maintenance costs. The present invention directly responds to fires through the linkage of an intelligent controller with the fire extinguishing device, simplifying the hardware configuration of the entire system. This invention eliminates the need for many traditional components (such as detectors, sprinklers, and pipe networks), significantly reducing hardware costs. It also reduces the complexity of wiring and equipment installation, shortening the construction period and lowering the difficulty. Compared to traditional systems, this invention can detect and activate fire extinguishing devices at the earliest stages of a fire, effectively controlling the spread of a fire at its source. The system's rapid response significantly minimizes fire hazards, ensuring the safety of personnel and property.

[0051] This invention replaces traditional fire detection methods with battery management system (BMS) data and temperature collection, significantly improving system stability and reliability while reducing costs. It provides early warning and precise response, reduces false alarms, prevents the spread of fire, and ensures personal safety and property loss. It also simplifies equipment and construction, improving the overall cost-effectiveness and ease of operation of the system.

[0052] Accordingly, the present invention also provides a fire detection system for a battery energy storage system, wherein the battery energy storage system includes a battery compartment and a plurality of battery pack assemblies arranged in the battery compartment, and the fire detection system includes: a battery compartment detector, arranged in the battery compartment, for collecting the temperature, smoke concentration and combustible gas concentration of the battery compartment; a plurality of battery management units, for collecting the temperature of each battery cell of each battery pack assembly; a battery management system, communicating with the plurality of battery management units in a daisy chain manner, and receiving the battery cell temperature from the battery management units; a processor, electrically connected to the battery management system and the battery compartment detector, for receiving a first detection signal from the battery compartment detector, the first detection signal including one or more of the temperature, smoke concentration and combustible gas concentration of the battery compartment, and receiving a second detection signal from the battery management system, the second detection signal being the temperature of each battery cell of each battery pack assembly collected by each battery management unit, and triggering corresponding firefighting measures according to the first detection signal and / or the second detection signal.

[0053] Specifically, in one embodiment of the present invention, the processor is used to: when the temperature of the battery compartment exceeds a first temperature threshold or the smoke concentration exceeds a first smoke concentration threshold or the combustible gas concentration exceeds a first combustible gas concentration threshold or the temperature change value of the battery compartment exceeds a first temperature change threshold, generate an early warning signal and send it to the fire protection module; under the control of the early warning signal, turn on the ventilation system of the fire protection module for exhaust.

[0054] Specifically, in one embodiment of the present invention, the processor is used to: when the temperature of the battery compartment exceeds the second temperature threshold, or the temperature of the battery compartment exceeds the first temperature threshold and the smoke concentration exceeds the first smoke concentration threshold, or the temperature of the battery compartment exceeds the first temperature threshold and the combustible gas concentration exceeds the first combustible gas concentration threshold, generate a fire alarm signal and send it to the fire fighting module; under the control of the fire alarm signal, open the external water valve of the fire fighting module to extinguish the fire.

[0055] Specifically, in one embodiment of the present invention, the processor is used to: when the second detection signal meets the first preset condition or the second preset condition, generate a battery cell thermal runaway signal and send it to the fire protection module, wherein the first preset condition is that one of the multiple battery cell temperatures exceeds the first cell temperature preset value and the voltage exceeds the voltage preset value, and the second preset condition is that the battery cell temperature of the same battery cell is greater than the second cell temperature preset value more than a preset number of times within a preset time and the battery cell temperature is different each time; under the control of the battery cell thermal runaway signal, the fire extinguishing device of the fire protection module is turned on to spray the fire extinguishing agent, and the ventilation system of the fire protection module is turned on at the same time.

[0056] An embodiment of the present invention further provides a fire detection device for a battery energy storage system, which may include:

[0057] memory for storing computer programs;

[0058] The processor, when used to execute the computer program stored in the above-mentioned memory, can implement the following steps:

[0059] Receive a first detection signal from a battery compartment detector, which is arranged in the battery compartment, and the first detection signal includes one or more of the temperature, smoke concentration and combustible gas concentration of the battery compartment; receive a second detection signal from a battery management system, which communicates with each battery management unit arranged in each battery pack assembly through a daisy chain manner, and the second detection signal is the temperature of each battery cell of each battery pack assembly collected by each battery management unit; trigger corresponding fire fighting measures according to the first detection signal and / or the second detection signal.

[0060] An embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the following steps can be implemented:

[0061] Receive a first detection signal from a battery compartment detector, which is arranged in the battery compartment, and the first detection signal includes one or more of the temperature, smoke concentration and combustible gas concentration of the battery compartment; receive a second detection signal from a battery management system, which communicates with each battery management unit arranged in each battery pack assembly through a daisy chain manner, and the second detection signal is the temperature of each battery cell of each battery pack assembly collected by each battery management unit; trigger corresponding fire fighting measures according to the first detection signal and / or the second detection signal.

[0062] The computer-readable storage medium may include: a USB flash drive, a mobile hard disk, a read-only memory (ROM)> a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes.

[0063] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0064] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the claims below, inventive aspects lie in less than all the features of the individual embodiments disclosed above. Accordingly, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of the invention.

[0065] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and in addition may be divided into multiple submodules or subunits or subcomponents. All features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed herein may be combined in any combination, except that at least some of such features and / or processes or units are mutually exclusive. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0066] Furthermore, those skilled in the art will appreciate that although some embodiments herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of the present invention and to form different embodiments. For example, in the claims below, any of the claimed embodiments may be used in any combination.

[0067] The various component embodiments of the present invention can be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. It will be appreciated by those skilled in the art that a microprocessor or digital signal processor (DSP) can be used in practice to implement some or all of the functions of some or all of the components in accordance with the embodiments of the present invention. The present invention can also be implemented as a device or apparatus program (e.g., a computer program and a computer program product) for executing a portion or all of the methods described herein. Such a program implementing the present invention can be stored on a computer-readable medium, or can have the form of one or more signals. Such a signal can be downloaded from an Internet website, or provided on a carrier signal, or provided in any other form.

[0068] It should be noted that the above embodiments illustrate rather than limit the invention, and that those skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between brackets should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention may be implemented by means of hardware comprising several different elements and by means of appropriately programmed computers. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

Claims

1. A fire detection method for a battery energy storage system, characterized in that: The following steps are involved: receiving a first detection signal from a battery compartment detector disposed in the battery compartment, the first detection signal including one or more of a temperature, a smoke concentration, and a combustible gas concentration of the battery compartment; receiving a second detection signal from a battery management system, the battery management system communicating with each battery management unit provided in each battery pack assembly via a daisy chain manner, the second detection signal being a temperature of each battery cell in each battery pack assembly collected by each battery management unit; Corresponding fire-fighting measures are triggered according to the first detection signal and / or the second detection signal.

2. The fire detection method for a battery energy storage system according to claim 1, characterized in that: The step of triggering corresponding firefighting measures according to the first detection signal and / or the second detection signal includes: When the temperature of the battery compartment exceeds a first temperature threshold, or the smoke concentration exceeds a first smoke concentration threshold, or the combustible gas concentration exceeds a first combustible gas concentration threshold, or the temperature change value of the battery compartment exceeds a first temperature change threshold, a warning signal is generated and sent to a fire protection module; Under the control of the early warning signal, the ventilation system of the fire-fighting module is turned on for exhaust.

3. The fire detection method for a battery energy storage system according to claim 1, characterized in that: The step of triggering corresponding firefighting measures according to the first detection signal and / or the second detection signal includes: When the temperature of the battery compartment exceeds the second temperature threshold, or the temperature of the battery compartment exceeds the first temperature threshold and the smoke concentration exceeds the first smoke concentration threshold, or the temperature of the battery compartment exceeds the first temperature threshold and the combustible gas concentration exceeds the first combustible gas concentration threshold, a fire alarm signal is generated and sent to the fire protection module; Under the control of the fire alarm signal, the external water valve of the fire fighting module is opened to extinguish the fire.

4. The fire detection method for a battery energy storage system according to claim 1, characterized in that: The step of triggering corresponding firefighting measures according to the first detection signal and / or the second detection signal includes: When the second detection signal satisfies a first preset condition or a second preset condition, a battery cell thermal runaway signal is generated and sent to the fire protection module, wherein the first preset condition is that one of the multiple battery cell temperatures exceeds a first cell temperature preset value and the voltage exceeds a voltage preset value, and the second preset condition is that the battery cell temperature of the same battery cell exceeds a second cell temperature preset value for more than a preset number of times within a preset time and the battery cell temperature is different each time; Under the control of the battery cell thermal runaway signal, the fire extinguishing device of the fire fighting module is turned on to spray the fire extinguishing agent, and the ventilation system of the fire fighting module is turned on at the same time.

5. A fire detection system for a battery energy storage system, characterized in that: The battery energy storage system includes a battery compartment and a plurality of battery pack assemblies arranged in the battery compartment. The fire detection system includes: The battery compartment detector is installed in the battery compartment and is used to collect the temperature, smoke concentration and combustible gas concentration of the battery compartment: Multiple battery management units for collecting the temperature of each battery cell in each battery pack assembly; a battery management system, communicating with the plurality of battery management units in a daisy-chain manner and receiving battery cell temperatures from the battery management units; A processor is electrically connected to the battery management system and the battery compartment detector, and is used to receive a first detection signal from the battery compartment detector, where the first detection signal includes one or more of the temperature, smoke concentration, and combustible gas concentration of the battery compartment, and receive a second detection signal from the battery management system, where the second detection signal is the temperature of each battery cell of each battery pack assembly collected by each battery management unit, and trigger corresponding fire-fighting measures based on the first detection signal and / or the second detection signal.

6. The fire detection system for a battery energy storage system according to claim 5, characterized in that: The processor is configured to: When the temperature of the battery compartment exceeds a first temperature threshold, or the smoke concentration exceeds a first smoke concentration threshold, or the combustible gas concentration exceeds a first combustible gas concentration threshold, or the temperature change value of the battery compartment exceeds a first temperature change threshold, a warning signal is generated and sent to a fire protection module; Under the control of the early warning signal, the ventilation system of the fire-fighting module is turned on for exhaust.

7. The fire detection system for a battery energy storage system according to claim 5, characterized in that: The processor is configured to: When the temperature of the battery compartment exceeds the second temperature threshold, or the temperature of the battery compartment exceeds the first temperature threshold and the smoke concentration exceeds the first smoke concentration threshold, or the temperature of the battery compartment exceeds the first temperature threshold and the combustible gas concentration exceeds the first combustible gas concentration threshold, a fire alarm signal is generated and sent to the fire protection module; Under the control of the fire alarm signal, the external water valve of the fire fighting module is opened to extinguish the fire.

8. The fire detection system for a battery energy storage system according to claim 5, characterized in that: The processor is configured to: When the second detection signal satisfies a first preset condition or a second preset condition, a battery cell thermal runaway signal is generated and sent to the fire protection module, wherein the first preset condition is that one of the multiple battery cell temperatures exceeds a first cell temperature preset value and the voltage exceeds a voltage preset value, and the second preset condition is that the battery cell temperature of the same battery cell exceeds a second cell temperature preset value for more than a preset number of times within a preset time and the battery cell temperature is different each time; Under the control of the battery cell thermal runaway signal, the fire extinguishing device of the fire fighting module is turned on to spray the fire extinguishing agent, and the ventilation system of the fire fighting module is turned on at the same time.

9. A fire detection device for a battery energy storage system, characterized in that: The method comprises a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the steps of the fire detection method for a battery energy storage system according to any one of claims 1 to 4 are implemented.

10. A computer-readable storage medium storing a computer program, wherein: When the computer program is executed by a processor, the method according to any one of claims 1 to 4 is implemented.

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