Intelligent air-breathing smoke sensing and lithium electrode combined fire early warning system

Abstract

The invention provides an intelligent air-breathing smoke detector and lithium electrode combined fire early warning system, which relates to the technical field of fire early warning and consists of an intelligent air-breathing smoke detector, a temperature detector, a combustible gas detector and a lithium electrode fire early warning module. The intelligent air-breathing type smoke detector comprises an air suction pump, a filter, a laser detection cavity, a control circuit and a display circuit, the air-breathing type smoke detector is provided with four programmable alarm threshold values, five relay outputs are arranged in the air-breathing type smoke detector, the efficient air suction pump is adopted, two air inlet pipes are installed, the model of an input and output module of the air-breathing type smoke detector is J-SR / C-VT6D, and the model of an output module of the air-breathing type smoke detector is J-SR / C-VT6D. The input and output module is connected with the controller through a non-polar two-bus, electronic coding is simple and convenient, the output point of the input and output module is a passive electric shock signal, the non-polar signal two-bus technology is adopted, various detectors are connected to the same bus to form a series circuit, and centralized management and monitoring of the system are facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of fire warning, and in particular to a fire warning system combining an intelligent suction type smoke sensor with a lithium electrode. Background Art

[0002] Since thermal runaway of lithium batteries is a complete closed-loop chemical reaction in terms of the battery structure itself, and the process occurs extremely quickly. In short, if thermal runaway of lithium batteries occurs, it will ignite quickly and cannot be blocked by traditional fire extinguishing methods (isolating oxygen or cooling). At the same time, the spread of thermal runaway will also occur quickly, and the lithium battery's own protection mechanism will be activated, releasing electrolyte gas through the battery's built-in pressure relief valve. At this time, if intervention or isolation is applied to the lithium battery, there is a more than 90% chance of blocking the occurrence of thermal runaway, especially for the lithium batteries used in energy storage stations with large battery capacity. Due to the inherently unstable characteristics of electrochemical energy storage, thermal runaway inside the battery and the system is difficult to completely avoid, which can easily induce accidents.

[0003] Existing applications and fire warning systems in power storage stations have certain limitations: traditional fire warning systems can often only monitor a single factor, such as smoke, temperature or combustible gas, and secondly, traditional fire warning systems are often complex in structure, high in maintenance costs, and cannot provide warnings in the early stages of a fire. Therefore, a fire warning system that combines an intelligent suction-type smoke sensor with a lithium electrode is needed to solve the above problems. Summary of the invention Technical issues solved

[0004] In view of the shortcomings of the prior art, the present invention provides a fire warning system combining an intelligent suction smoke sensor with a lithium electrode, which solves the following problems: 1. Comprehensive monitoring and early warning of fire risks are achieved, solving the problem that traditional fire early warning systems can only monitor a single factor; 2. By adopting high-precision composite lithium battery fire detectors and combining them with BMS intelligent linkage, early warning and effective protection of lithium battery fires can be achieved; 3. The system adopts non-polarity signal two-bus technology and series line design to simplify the system structure, reduce maintenance costs, improve system reliability and stability, and solve the problem that traditional fire warning systems are often complex in structure and have high maintenance costs.

[0005] Technical Solution

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a fire warning system of intelligent aspirating smoke detector combined with lithium electrode, the system is composed of intelligent aspirating smoke detector, temperature detector, combustible gas detector and lithium electrode fire warning module, wherein: The intelligent aspirating smoke detector includes an aspirating pump, a filter, a laser detection chamber, a control circuit and a display circuit. The aspirating smoke detector is provided with four programmable alarm thresholds, five relay outputs, a high-efficiency aspirating pump and two air intake pipes. The input and output module model of the aspirating smoke detector is J-SR / C-VT6D. The input and output module and the controller are connected by a non-polarity two-bus, and the electronic coding is simple. The output point of the input and output module is a passive electric shock signal.

[0007] Preferably, the aspirating smoke detector adopts a non-polarity signal two-bus technology, and the temperature detector, combustible gas detector, sound and light alarm and lithium electrode fire warning module carried by the system are connected to the same bus at the same time to form a series line, which is convenient for centralized management and monitoring of the system. The aspirating smoke detector has an eight-bit single-chip microcomputer with built-in A / D conversion, which can convert analog signals into digital signals, and process and analyze the signals through an internal fixed operation program to achieve accurate monitoring and diagnosis of smoke parameters in the station. When the smoke detector detects that the smoke parameters in the station exceed the smoke alarm threshold, that is, (2-3) When the fire alarm signal is output immediately.

[0008] Preferably, the temperature sensing detector adopts non-polarity signal two-bus technology. When the temperature in the station exceeds the temperature alarm threshold of 65-85°C, it immediately outputs a fire alarm signal and is combined with a smoke detector to improve the reliability and accuracy of fire detection. The temperature sensing detector is an infrared matrix temperature sensor.

[0009] Preferably, the combustible gas detector adopts non-polarity signal two-bus technology, and uses a 16-bit single-chip microcomputer with built-in A / D conversion and a high-precision gas rapid detection sensor to monitor the combustible gases H2 and CO in the station. When the combustible gas detector detects that the volume fraction of H2 and CO in the station exceeds the alarm threshold 3 When the fire alarm signal is output immediately.

[0010] Preferably, the system links the high-precision composite lithium battery fire detector with the BMS and the fire protection system. When the temperature in the station and the smoke, combustible gas H2, and CO volume fraction exceed the threshold, the smoke, temperature and combustible gas detectors are linked to the BMS to control the ventilation, tripping and air conditioning in the power station, and are linked to the fire alarm linkage control system to start the fire extinguishing device to extinguish the fire.

[0011] Preferably, the lithium electrode fire warning module is mainly composed of a receiving unit, a transmission unit, a central processing unit, an alarm platform, a power supply system and auxiliary equipment.

[0012] Preferably, the receiving unit receives detection data from aspirating smoke detectors, temperature detectors, and combustible gas detectors, and the transmission unit transmits the data received by the sensor to the central processing unit. The transmission unit can adopt limited and wireless transmission methods according to the amount of data. The central processing unit is responsible for receiving and analyzing the data transmitted by the sensor, judging whether there is a fire risk in the lithium battery, and controlling the issuance of early warning and alarm signals. The alarm platform includes a main body alarm device for remote monitoring and data analysis, and sends early warning signals to the user's mobile phone APP through the cloud platform.

[0013] Preferably, the specific working steps of the aspirating smoke detector are as follows: SP1. The air around the lithium battery pack of the energy storage station is extracted through the suction pump and the intake pipe. The air is analyzed after extraction. The suction smoke detector actively extracts smoke particles, detects smoke particles through the laser heat dissipation detection principle, and self-generates smoke particle concentration values; SP2. The aspirating smoke detector is pre-set with a warning threshold and a fire alarm threshold; SP3. The amount of air sucked by the air intake pump each time needs to be set in advance and should not be exceeded. Beneficial Effects

[0014] The present invention provides a fire warning system combining intelligent air-suction smoke sensor and lithium electrode. It has the following beneficial effects: The present invention adopts the non-polarity signal two-bus technology to connect various detectors to the same bus to form a series line, which is convenient for centralized management and monitoring of the system. This design simplifies the system structure, reduces maintenance costs, and improves the reliability and stability of the system.

[0015] The present invention realizes early warning and protection design for lithium battery fires in energy storage power stations by linking high-precision composite lithium battery fire detectors with BMS and fire protection systems. This design can timely discover and deal with fire hazards and effectively ensure the safe operation of the energy storage system.

[0016] In the present invention, the aspirating smoke detector works closely with the temperature detector, the combustible gas detector, the sound and light alarm and the lithium electrode fire warning module. They are connected to the same bus through the non-polarity signal two-bus technology to form an intelligent "information highway". When the system detects that the temperature in the station is abnormally high, the combustible gas concentration exceeds the standard or the smoke concentration exceeds the alarm threshold, the linkage mechanism will be immediately activated. The central processor in the lithium electrode fire warning module quickly receives and analyzes the data to determine whether there is a fire risk in the lithium battery, and sends a warning signal to the user's mobile phone APP through the alarm platform. Once the system determines that there is a fire risk, the fire extinguishing device will be immediately activated to extinguish the fire. At the same time, the BMS system will also control the ventilation, tripping and air-conditioning equipment in the power station to take corresponding measures to ensure that the fire is controlled in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the overall system workflow diagram of the present invention; Figure 2 This is a working diagram of the lithium electrode fire warning module system of the present invention; DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Specific embodiments

[0019] like Figure 1-2 As shown, the fire warning system of intelligent aspirating smoke sensor combined with lithium electrode is composed of intelligent aspirating smoke detector, temperature detector, combustible gas detector and lithium electrode fire warning module, among which: The intelligent aspirating smoke detector includes an aspirating pump, a filter, a laser detection chamber, a control circuit and a display circuit. The aspirating smoke detector is equipped with four programmable alarm thresholds, five relay outputs, a high-efficiency aspirating pump and two air intake pipes. The input and output module model of the aspirating smoke detector is J-SR / C-VT6D. The input and output module and the controller are connected by a non-polarity two-bus. The electronic coding is simple, and the output point of the input and output module is a passive electric shock signal.

[0020] The aspirating smoke detector uses a non-polarity signal two-bus technology to connect the temperature detector, combustible gas detector, sound and light alarm and lithium electrode fire warning module carried by the system on the same bus at the same time, forming a series line, which is convenient for centralized management and monitoring of the system. The aspirating smoke detector has a built-in A / D conversion 8-bit microcontroller, which can convert analog signals into digital signals, and process and analyze the signals through the internal fixed operation program to achieve accurate monitoring and diagnosis of the smoke parameters in the station. When the smoke detector detects that the smoke parameters in the station exceed the smoke alarm threshold (2-3) When the fire alarm signal is output immediately.

[0021] The temperature detector uses non-polarity signal two-bus technology. Considering that the temperature inside the energy storage power station rises sharply when the lithium battery thermal runaway catches fire, the alarm bus of the alarm controller is connected in any way. When the temperature inside the station exceeds the temperature alarm threshold of 65-85℃, a fire alarm signal is immediately output and combined with the smoke detector to improve the reliability and accuracy of fire detection. The temperature detector is an infrared matrix temperature sensor used to detect temperature changes on the surface of lithium batteries.

[0022] The combustible gas detector uses non-polarity signal two-bus technology, and uses a 16-bit single-chip microcomputer with built-in A / D conversion and a high-precision gas rapid detection sensor to monitor the combustible gases H2 and CO in the station. When the combustible gas detector detects that the volume fraction of H2 and CO in the station exceeds the alarm threshold of 3 When the fire alarm signal is output immediately.

[0023] The system links high-precision composite lithium battery fire detectors with BMS and fire protection systems. When the temperature in the station and the volume fraction of smoke, combustible gas H2 and CO exceed the threshold, the smoke, temperature and combustible gas detectors link the BMS to control ventilation, tripping and air conditioning in the power station, and link with the fire alarm linkage control system to start the fire extinguishing device to extinguish the fire. The lithium battery energy storage power station is equipped with an early warning device for lithium battery fires in the energy storage power station. Through the intelligent linkage of high-precision composite lithium battery fire detectors and BMS, a multi-level warning and protection design is established in the station, which can effectively make up for the shortcomings of the current application of fire warning in energy storage power stations and improve the reliability of energy storage system operation.

[0024] like Figure 1-2 As shown, the lithium electrode fire warning module is mainly composed of a receiving unit, a transmission unit, a central processing unit, an alarm platform, a power supply system and auxiliary equipment.

[0025] The receiving unit receives the detection data from the aspirating smoke detector, temperature detector, and combustible gas detector. The transmission unit transmits the data received by the sensor to the central processor. The transmission unit can adopt limited and wireless transmission methods according to the amount of data. The central processor is responsible for receiving and analyzing the data transmitted by the sensor, judging whether there is a fire risk in the lithium battery, and controlling the issuance of early warning and alarm signals. The alarm platform includes a main body alarm device for remote monitoring and data analysis, and sends early warning signals to the user's mobile phone APP through the cloud platform.

[0026] The specific working steps of the aspirating smoke detector are as follows: SP1. The air around the lithium battery pack of the energy storage station is extracted through the suction pump and the intake pipe. The air is analyzed after extraction. The suction smoke detector actively extracts smoke particles, detects smoke particles through the laser heat dissipation detection principle, and self-generates smoke particle concentration values; SP2. The aspirating smoke detector has a pre-set warning threshold and fire alarm threshold; SP3. The amount of air suction by the air intake pump each time needs to be set in advance and should not be exceeded.

[0027] like Figure 1-2 As shown, the overall system improves the accuracy and timeliness of fire warnings: the intelligent aspirating smoke detector combined with the temperature detector and the combustible gas detector can conduct multi-dimensional and comprehensive monitoring of the fire risk of lithium batteries in energy storage power stations. Through accurate detection and timely warning, it can quickly discover and take effective measures in the early stages of a fire, thereby greatly improving the accuracy and timeliness of fire warnings.

[0028] Realize centralized management and monitoring of the system: By adopting the non-polarity signal two-bus technology, various detectors are connected to the same bus to form a series line, which is convenient for centralized management and monitoring of the system. This design simplifies the system structure, reduces maintenance costs, and improves the reliability and stability of the system.

[0029] Improve the reliability of energy storage system operation: By linking high-precision composite lithium battery fire detectors with BMS and fire protection systems, early warning and protection design for lithium battery fires in energy storage power stations can be achieved. This design can promptly detect and deal with fire hazards and effectively ensure the safe operation of the energy storage system.

[0030] After the highly sensitive optical receiver receives the scattered light signal, it is accurately processed and analyzed by the system's internal A / D conversion eight-bit microcontroller. There are four programmable alarm thresholds preset inside the detector. When the detected smoke concentration exceeds the preset threshold, the system will respond immediately, just like triggering an alarm. The five relay outputs in the detector will work quickly to transmit the fire alarm signal. At the same time, the numbers on the display circuit are also jumping, showing the current smoke concentration value and its alarm level.

[0031] The aspirating smoke detector works closely with the temperature detector, combustible gas detector, sound and light alarm and lithium electrode fire warning module. They are connected to the same bus through the non-polarity signal two-bus technology to form an intelligent "information highway". When the system detects that the temperature in the station is abnormally high, the combustible gas concentration exceeds the standard or the smoke concentration exceeds the alarm threshold, the linkage mechanism will be immediately activated. The central processor in the lithium electrode fire warning module quickly receives and analyzes the data to determine whether there is a fire risk in the lithium battery, and sends a warning signal to the user's mobile phone APP through the alarm platform. Once the system determines that there is a fire risk, it will immediately start the fire extinguishing device to extinguish the fire. At the same time, the BMS system will also control the ventilation, tripping and air-conditioning equipment in the power station to take corresponding measures to ensure that the fire is controlled in time.

[0032] The whole process is like a well-trained fire brigade, which takes quick action at the early stage of the fire and nips the fire in the bud. In summary, the fire warning system combining intelligent suction smoke sensing with lithium electrodes is like an all-round "safety guard". It provides a solid guarantee for the safe operation of energy storage power stations through keen perception, precise analysis and rapid response.

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

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

Claims

1. Intelligent suction smoke sensor combined with lithium electrode fire warning system, characterized by: The system consists of intelligent aspirating smoke detectors, temperature detectors, combustible gas detectors and lithium electrode fire warning modules, among which: The intelligent aspirating smoke detector includes an aspirating pump, a filter, a laser detection chamber, a control circuit and a display circuit. The aspirating smoke detector is provided with four programmable alarm thresholds, five relay outputs, a high-efficiency aspirating pump and two air intake pipes. The input and output module model of the aspirating smoke detector is J-SR / C-VT6D. The input and output module and the controller are connected by a non-polarity two-bus, and the electronic coding is simple. The output point of the input and output module is a passive electric shock signal; The aspirating smoke detector, temperature detector, combustible gas detector and lithium electrode fire warning module included in the system are all installed in the battery cabinet of the energy storage station.

2. The fire warning system of the intelligent air-suction smoke sensor combined with lithium electrode according to claim 1 is characterized in that: The aspirating smoke detector adopts non-polarity signal two-bus technology, and connects the temperature detector, combustible gas detector, sound and light alarm and lithium electrode fire warning module carried by the system on the same bus at the same time to form a series line, which is convenient for centralized management and monitoring of the system. The aspirating smoke detector has a built-in eight-bit microcontroller with A / D conversion.

3. The fire warning system of the intelligent air-suction smoke sensor combined with lithium electrode according to claim 2 is characterized in that: The temperature detector adopts non-polarity signal two-bus technology. When the temperature in the station exceeds the temperature alarm threshold of 65-85°C, it immediately outputs a fire alarm signal and combines with the smoke detector to improve the reliability and accuracy of fire detection. The temperature detector is an infrared matrix temperature sensor.

4. The fire warning system of the intelligent air-suction smoke sensor combined with lithium electrode according to claim 3 is characterized in that: The combustible gas detector adopts non-polarity signal two-bus technology, and uses a 16-bit single-chip microcomputer with built-in A / D conversion and a high-precision gas rapid detection sensor to monitor the combustible gases H2 and CO in the station. When the combustible gas detector detects that the volume fraction of H2 and CO in the station exceeds the alarm threshold of 3 When the fire alarm signal is output immediately.

5. The fire warning system of the intelligent air-suction smoke sensor combined with lithium electrode according to claim 1 is characterized in that: The system links high-precision composite lithium battery fire detectors with the BMS and fire protection system. When the temperature, smoke, and combustible gas H2 and CO volume fractions in the station exceed the threshold, the smoke, temperature, and combustible gas detectors link the BMS to control ventilation, tripping, and air conditioning in the power station, and link with the fire alarm linkage control system to start the fire extinguishing device to extinguish the fire.

6. The fire warning system of the intelligent air-suction smoke sensor combined with lithium electrode according to claim 1 is characterized in that: The lithium electrode fire warning module is mainly composed of a receiving unit, a transmission unit, a central processing unit, an alarm platform, a power supply system and auxiliary equipment.

7. The fire warning system of the intelligent air-suction smoke sensor combined with lithium electrode according to claim 6 is characterized in that: The receiving unit receives detection data from the aspirating smoke detector, the temperature detector, and the combustible gas detector, and the transmitting unit transmits the data received by the sensor to the central processor.

8. The fire warning system of the intelligent air-suction smoke sensor combined with lithium electrode according to claim 7 is characterized in that: The transmission unit can adopt limited and wireless transmission methods according to the amount of data. The central processor is responsible for receiving and analyzing the data transmitted by the sensor, judging whether there is a fire risk in the lithium battery, and controlling the issuance of early warning and alarm signals. The alarm platform includes a main body alarm device for remote monitoring and data analysis, and sends early warning signals to the user's mobile phone APP through the cloud platform.

9. The fire warning system of the intelligent air-suction smoke sensor combined with lithium electrode according to claim 7 is characterized in that: The specific working steps of the aspirating smoke detector are as follows: SP1. The air around the lithium battery pack of the energy storage station is extracted through the suction pump and the intake pipe. The air is analyzed after extraction. The suction smoke detector actively extracts smoke particles, detects smoke particles through the laser heat dissipation detection principle, and self-generates smoke particle concentration values; SP2. The aspirating smoke detector is pre-set with a warning threshold and a fire alarm threshold; SP3. The amount of air sucked by the air intake pump each time needs to be set in advance and should not be exceeded.

Images