CN115487445A - Fire warning method and system for high-voltage cascaded battery system - Google Patents

Abstract

The present application relates to a fire warning method, system, device, computer equipment, storage medium and computer program product for a high-voltage cascaded battery system. The method includes: by acquiring the smoke data and combustible gas data of each battery module in the battery cluster and the temperature data of each cell in each battery module, if according to the smoke data of each battery module, the combustible gas data of each battery module and Based on the temperature data of each battery cell, it is determined that the warning level is the preset level, and the fire extinguishing agent bottle group is activated to extinguish the fire of each battery module. Battery container for water extinguishing. The fire extinguishing accuracy can be achieved by adopting the method.

Description

Fire warning method and system for high-voltage cascaded battery system

technical field

The present application relates to the field of energy storage technology, in particular to a fire warning method and system for a high-voltage cascaded battery system.

Background technique

With the development of energy storage technology, the traditional battery energy storage power station can convert the DC power of the battery system into AC power through the energy storage converter, and then boost the AC power through the step-up transformer to connect to the grid, so as to meet the power supply demand, but , the battery system in the energy storage power station may experience thermal runaway due to its own chemical reactions and external influences during charging and discharging, which affects the safety of the energy storage power station.

Generally, a fire detector can be installed in the battery system in the energy storage power station to detect the operation of the battery system in the energy storage power station, so that fire extinguishing treatment can be implemented in case of fire.

However, the current fire extinguishing method has low sensitivity, which may cause the fire to spread and reduce the accuracy of fire extinguishing treatment.

Contents of the invention

Based on this, it is necessary to provide a fire warning method and system for a high-voltage cascaded battery system capable of improving fire extinguishing accuracy in view of the above technical problems.

In a first aspect, the present application provides a fire warning method for a high-voltage cascaded battery system. The methods include:

Obtain smoke data, combustible gas data of each battery module in the battery cluster, and temperature data of each cell in each battery module;

If according to the smoke data of each of the battery modules, the combustible gas data of each of the battery modules, and the temperature data of each of the battery cells, it is judged that the warning level is a preset level, and the fire extinguishing agent bottle group is started to carry out the fire on each of the battery modules. Extinguishing;

After activating the fire extinguishing agent bottle set to extinguish the fire of each of the battery modules, if it is judged that there is a risk of re-ignition, the battery container is extinguished with water; the battery cluster is arranged in the battery container.

In one of the embodiments, the temperature data of each battery cell includes temperature rise rate, temperature difference and maximum temperature, the combustible gas data of each battery module includes combustible gas concentration, and the smoke data of each battery module includes smoke concentration , if according to the smoke data of each of the battery modules, the combustible gas data of each of the battery modules and the temperature data of each of the battery cells, it is judged that the warning level is a preset level, including:

If the temperature rise rate is greater than or equal to the preset rate, or the temperature difference is greater than or equal to the preset temperature difference, or the highest temperature is greater than or equal to the preset temperature, and the concentration of the combustible gas is greater than or equal to the preset gas concentration , and the smoke concentration is greater than or equal to a smoke preset concentration, and the warning level is determined as the preset level.

In one of the embodiments, after activating the fire extinguishing agent bottle set to extinguish the fire of each of the battery modules, if it is judged that there is a risk of re-ignition, the battery container is extinguished with water, including:

After starting the fire extinguishing agent bottle set to extinguish the fire of each of the battery modules, obtain the concentration of the fire extinguishing agent sprayed by the fire extinguishing agent bottle set in the battery container;

If the concentration of the fire extinguishing agent is greater than or equal to the preset fire extinguishing agent concentration, close the fire extinguishing agent bottle group, and reacquire the temperature rise rate, temperature difference and maximum temperature of each of the batteries; the temperature of each of the batteries The data includes the temperature rise rate, temperature difference and maximum temperature;

If within the preset time, the reacquired temperature rise rate is greater than or equal to the preset rate, or, the reacquired maximum temperature is greater than or equal to the preset temperature, or, the reacquired temperature difference is greater than or equal to the preset Set the temperature difference, and continue to start the fire extinguishing agent bottle group to extinguish the fire of each of the battery modules;

If the number of times of starting the fire extinguishing agent bottle set exceeds the preset number of times, it is determined that the risk of re-ignition occurs, the fire extinguishing agent bottle set is closed, and the water fire-fighting interface in the battery container is opened to extinguish the battery container with water.

In one of the embodiments, after activating the fire extinguishing agent bottle set to extinguish the fire of each of the battery modules, if it is judged that there is a risk of re-ignition, the battery container is extinguished with water, including:

After starting the fire extinguishing agent bottle set to extinguish the fire of each of the battery modules, acquiring image data in the battery container;

If it is determined according to the image data that the risk of re-ignition occurs, the water fire-fighting interface in the battery container is opened to extinguish the battery container with water.

In one of the embodiments, after activating the fire extinguishing agent bottle set to extinguish the fire of each of the battery modules, if it is judged that there is a risk of re-ignition, the battery container is extinguished with water, including:

After activating the fire extinguishing agent bottle set to extinguish the fire of each of the battery modules, if a control instruction is received and it is determined that a risk of re-ignition occurs, the water fire-fighting interface in the battery container is opened to extinguish the battery container with water.

In the second aspect, the present application also provides a fire warning system for a high-voltage cascaded battery system, which is characterized in that it includes: a battery container, the battery container is provided with a fire-fighting host, a battery cluster, and a fire extinguishing agent bottle group, and the battery The cluster includes a high-voltage box and a plurality of battery modules, smoke detectors and combustible gas detectors are respectively set in each battery module, and temperature probes are respectively set for each battery cell in each battery module, and an alarm is set in the high-voltage box module,

The smoke detector is used to obtain the smoke data of each of the battery modules;

The combustible gas detector is used to obtain combustible gas data of each of the battery modules;

Each of the temperature probes is used to obtain the temperature data of each of the cells;

The alarm module is configured to, if according to the smoke data of each of the battery modules, the combustible gas data of each of the battery modules, and the temperature data of each of the battery cells, determine that the warning level is a preset level, and report to the fire control host Sending fire alarm prompt information, so that the fire control host activates the fire extinguishing agent bottle set to extinguish the fire of each of the battery modules;

The alarm module is also used to send a resurgence prompt message to the fire control host if it is judged that there is a risk of resurgence after the battery modules of the fire extinguishing agent bottle group are activated to extinguish the fire, so that the fire control host turns on The water fire-fighting interface in the battery container performs water fire extinguishing on the battery container.

In one of the embodiments, it also includes: a cabinet arranged in the battery cluster and a spray head arranged on the front panel of each of the battery modules, each of the battery modules is fixed on the cabinet, and the A set of main pipes and solenoid valves are laid on the top, multiple sets of branch pipes are fixed on the vertical beams in front of the cabinet and inside the cabinet, and one end of the solenoid valve is connected to the set of main pipes through the set of main pipes. The fire extinguishing agent bottle group, the other end is connected to the spray head through each of the branch pipes;

The fire control host is used to open the electromagnetic valve when receiving the fire alarm message, so that the fire extinguishing agent in the fire extinguishing agent bottle set passes through the main pipeline, the electromagnetic valve, the branch pipeline and the The spray head is sprayed to each of the battery modules.

In one of the embodiments, the solenoid valve is a normally closed solenoid valve.

In one of the embodiments, both the main pipe and the branch pipes are metal flexible pipes.

In one of the embodiments, the high voltage box is also provided with a photoelectric conversion module,

The photoelectric conversion module is used for the alarm module to send the fire alarm prompt information or the resurgence prompt information to the fire control host through an optical fiber.

In a third aspect, the present application also provides a fire warning device for a high-voltage cascaded battery system. The devices include:

An acquisition module, configured to acquire smoke data, combustible gas data of each battery module in the battery cluster, and temperature data of each cell in each of the battery modules;

The fire extinguishing agent fire extinguishing module is used to start the fire extinguishing agent bottle set if the smoke data of each battery module, the combustible gas data of each battery module and the temperature data of each battery cell are used to judge that the warning level is a preset level Extinguish each of the battery modules;

The water fire extinguishing module is used to extinguish the fire of the battery container with water if it is judged that there is a risk of re-ignition after starting the fire extinguishing agent bottle set to extinguish the fire of each of the battery modules; the battery cluster is arranged in the battery container.

In a fourth aspect, the present application also provides a computer device. The computer device includes a memory and a processor, the memory stores a computer program, and the processor implements the following steps when executing the computer program:

Obtain smoke data, combustible gas data of each battery module in the battery cluster, and temperature data of each cell in each battery module;

If according to the smoke data of each of the battery modules, the combustible gas data of each of the battery modules, and the temperature data of each of the battery cells, it is judged that the warning level is a preset level, and the fire extinguishing agent bottle group is started to carry out the fire on each of the battery modules. Extinguishing;

After activating the fire extinguishing agent bottle set to extinguish the fire of each of the battery modules, if it is judged that there is a risk of re-ignition, the battery container is extinguished with water; the battery cluster is arranged in the battery container.

In a fifth aspect, the present application also provides a computer-readable storage medium. The computer-readable storage medium has a computer program stored thereon, and when the computer program is executed by a processor, the following steps are implemented:

Obtain smoke data, combustible gas data of each battery module in the battery cluster, and temperature data of each cell in each battery module;

If according to the smoke data of each of the battery modules, the combustible gas data of each of the battery modules, and the temperature data of each of the battery cells, it is judged that the warning level is a preset level, and the fire extinguishing agent bottle group is started to carry out the fire on each of the battery modules. Extinguishing;

After activating the fire extinguishing agent bottle set to extinguish the fire of each of the battery modules, if it is judged that there is a risk of re-ignition, the battery container is extinguished with water; the battery cluster is arranged in the battery container.

In a sixth aspect, the present application further provides a computer program product. The computer program product includes a computer program, and when the computer program is executed by a processor, the following steps are implemented:

Obtain smoke data, combustible gas data of each battery module in the battery cluster, and temperature data of each cell in each battery module;

If according to the smoke data of each of the battery modules, the combustible gas data of each of the battery modules, and the temperature data of each of the battery cells, it is judged that the warning level is a preset level, and the fire extinguishing agent bottle group is started to carry out the fire on each of the battery modules. Extinguishing;

After activating the fire extinguishing agent bottle set to extinguish the fire of each of the battery modules, if it is judged that there is a risk of re-ignition, the battery container is extinguished with water; the battery cluster is arranged in the battery container.

The fire warning method, system, device, computer equipment, storage medium, and computer program product of the above-mentioned high-voltage cascaded battery system obtain the smoke data and combustible gas data of each battery module in the battery cluster, and each battery module in the battery cluster. The temperature data of the batteries, if according to the smoke data of each of the battery modules, the combustible gas data of each of the battery modules, and the temperature data of each of the batteries, it is judged that the early warning level is a preset level, and the fire extinguishing agent bottle set is activated. Each of the battery modules is extinguished, and after starting the fire extinguishing agent bottle group to extinguish the fire of each of the battery modules, if it is judged that there is a risk of re-ignition, the battery container can be extinguished with water. In this way, different judgment conditions can be used to achieve The precise control of the fire extinguishing process can improve the accuracy of fire extinguishing.

Description of drawings

Fig. 1 is a structural schematic diagram of a fire warning system of a high-voltage cascaded battery system in an embodiment;

Fig. 2 is a structural schematic diagram of a battery cluster in an embodiment;

Fig. 3 is the structural representation of main pipeline in an embodiment;

Fig. 4 is the structural representation of branch pipeline in an embodiment;

Fig. 5 is a schematic diagram of the principle of fire early warning in an embodiment;

Figure 6 is a schematic diagram of a hierarchical early warning strategy in an embodiment;

Fig. 7 is a schematic diagram of the principle of three fire extinguishing strategies in one embodiment;

Fig. 8 is a schematic flowchart of a fire warning method for a high-voltage cascaded battery system in an embodiment;

Figure 9 is a schematic flow diagram of water extinguishing the battery container if it is judged that there is a risk of re-ignition after the fire extinguishing agent bottle group is activated to extinguish the fire of each battery module;

FIG. 10 is a schematic structural diagram of a fire warning device for a high-voltage cascaded battery system in an embodiment;

Figure 11 is a diagram of the internal structure of a computer device in one embodiment.

detailed description

In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

With the development of energy storage technology, traditional battery energy storage power stations can convert the DC power of the battery system into AC power through energy storage converters, and then boost the AC power through a step-up transformer to connect to the grid to meet the power supply demand.

Judging from the application of large-scale energy storage projects that have been implemented on the grid side, the traditional battery energy storage solution has the advantage of flexible configuration, but there are too many battery modules connected in parallel in the battery cluster, the battery capacity utilization rate is low, and the temperature is difficult to maintain. Consistent, and the capacity of a single system in an energy storage power station is small, the output voltage of a single system is low, the output power of a single system is small, there are many transformers and high-voltage switchgears, the system efficiency is low, coordination between systems is difficult, and the dispatching response time is too long The problem is that it is difficult to meet the emergency dispatching needs of the power grid, and the high-voltage cascaded energy storage system came into being. The high-voltage cascaded energy storage system adopts the "energy cracking" technology, combining large-scale battery clusters and high-power energy storage converters (Power Conversion System, PCS) is split into small-battery battery clusters and low-power AC/DC power units, using a three-phase star-connected cascaded H-bridge topology, directly outputting 0.4-35kV three-phase AC voltage, and connecting to the AC grid for single-phase output without a transformer The power can reach more than 10MW, which effectively solves the shortcomings of traditional technologies, and is more suitable for large-scale energy storage application scenarios and battery cascade utilization scenarios.

Safety is the first element of an energy storage system. Lithium-ion batteries may experience thermal runaway due to their own chemical reactions or external influences during charging and discharging, seriously affecting the safety of energy storage power stations. At present, energy storage fire protection systems often use full flooding The heptafluoropropane fire extinguishing system monitors the operation of the energy storage system by setting up multiple different types of fire detectors. The response is lagging and the sensitivity is low. Accuracy of fire extinguishing treatment.

In view of this, the embodiment of the present application provides a fire warning method for a high-voltage cascaded battery system, which can be applied to the fire warning system for a high-voltage cascaded battery system as shown in Figure 1. The fire warning system includes: battery container 100, battery cluster 10, PCS cabinet 20, control cabinet 30 and fire fighting system are arranged in battery container 100.

Among them, the PCS cabinet 30 contains a plurality of power modules, and each power module corresponds to a set of battery clusters, thereby forming an energy storage chain link, and each energy storage chain link can provide a voltage of 10kV in series.

Among them, the battery cluster is used as the minimum spraying unit of the fire extinguishing agent, and multiple battery clusters can share a set of fire extinguishing agent bottle sets. Specifically, the battery cluster 10 includes multiple battery modules, high-voltage boxes and cabinets, and multiple battery modules and high-voltage boxes It is fixed on the cabinet; the high-voltage box integrates an alarm module and a photoelectric conversion module. Considering the high voltage level of the high-voltage cascaded battery cluster, in order to avoid communication interference, the alarm module realizes optical fiber communication with the fire control host through the photoelectric conversion module; each battery module is The smallest unit, each battery module includes a battery and a casing, and each battery module includes a smoke detector and a combustible gas detector. The combustible gas detector can be used to detect other types of combustible gases such as _H2 and CO, so that various Combustible gas in the battery module and obtain combustible gas data, the smoke detector can be used to detect the smoke in each battery module in real time and obtain smoke data, timely and accurately find the thermal runaway area; each battery module also includes multiple battery Each battery cell is equipped with a nozzle, and each battery module is also equipped with multiple temperature probes. Each temperature probe can be respectively set on the connecting piece of the adjacent battery cell. Based on each temperature probe, the temperature data of each battery cell can be obtained. , based on the nozzles on each battery cell, the fire extinguishing of each battery module can be realized; the nozzles can be atomizing nozzles.

Among them, multiple temperature probes, smoke detectors, combustible gas detectors and alarm modules can constitute a fire early warning system. The fire protection system includes a fire early warning system. Based on the fire early warning system, it is possible to monitor the operation of the system, grade early warning, and early intervention , to improve the safety of the battery system; contactors, fuses, etc. can also be integrated in the high-voltage box. Once a fire is detected, the fire-fighting host disconnects the contactors to disconnect the electrical connection between the battery clusters and reduce risks.

Exemplarily, as shown in FIG. 2 , a structural diagram of a battery cluster is provided, wherein the battery cluster includes a battery module 200, and the battery module 200 includes a plurality of battery cells, respectively M1 to M13, and each battery cell is provided with As for the shower head, a temperature probe is also provided on the connecting piece of the adjacent battery cell, which is not shown in the figure, and a smoke detector and a combustible gas detector are also arranged in the battery module 200 .

Wherein, the fire extinguishing agent delivery system 41 includes a main pipeline, multiple sets of branch pipelines, solenoid valves and nozzles, as shown in Figure 3, the main pipeline is laid on the top of the cabinet 13, and the top of the cabinet 13 is fixed with a solenoid valve, as shown in Figure 3 As shown in 4, there are multiple sets of branch pipes fixed on the vertical beams in front of the cabinet 13 and inside the cabinet 13. The number of branch pipes depends on the number of battery clusters. Specifically, one end of the main pipe is connected to the fire extinguishing agent bottle group, and the other One end is connected to the nozzles on the front panel of each battery module through a solenoid valve and branch pipes; considering the high voltage level of the high-voltage cascaded battery cluster, in order to ensure safety, the material of the main pipe and the branch pipes are metal hoses. It is convenient to install and replace parts; the solenoid valve can be a normally closed solenoid valve.

Among them, the battery management system (Battery Management System, BMS) can be integrated in the control cabinet 30, and the BMS can analyze the data uploaded from the battery cluster management unit (Battery Cluster Management System, BCMS), and communicate with the fire control host, and the BMS can communicate with the fire alarm The system can jointly monitor the operation status of the fire warning system; the BCMS is set in the high-voltage box, and the data uploaded by the BCMS to the BMS is obtained from the battery management unit (Battery Monitoring Unit, BMU). The temperature data and voltage data of the cell.

On the basis of the schematic diagrams shown in Figures 2 to 4, as shown in Figure 5, a schematic diagram of a fire warning principle is provided, wherein the alarm module receives the temperature data uploaded by each temperature probe, combined with the smoke detector detection The smoke data and the combustible gas data detected by the combustible gas detector can determine different early warning levels, basically different warning levels determine different prompt information, and the alarm module can upload the prompt information to the fire control host 40 through the photoelectric conversion module. Different prompt information determines whether to start the fire extinguishing agent bottle set 44, to ensure that abnormal conditions such as short circuit and heating are detected in time when each battery module is working, early warning is given, and fire extinguishing treatment is started early to eliminate fire hazards in the bud.

Specifically, as shown in Figure 6, a schematic diagram of a hierarchical early warning strategy is provided, and the early warning level can be determined based on the following implementation methods, wherein:

In the first implementation mode, if the temperature rise rate is greater than or equal to the preset rate, or, the highest temperature is greater than or equal to the preset temperature, or, the temperature difference is greater than or equal to the preset temperature difference, and the combustible gas concentration is less than the combustible gas preset concentration , then it is determined that the early warning level is a first-level early warning, and the alarm module uploads the early warning prompt information to the fire control host 43 through the photoelectric conversion module, but does not start the fire extinguishing agent bottle group 44.

It can be understood that if the temperature rise rate is less than the preset rate, or the highest temperature is less than the preset temperature, or the temperature difference is less than the preset temperature difference, it can be determined that the voltage modules in the battery cluster are not abnormal, that is, each battery cluster The battery module did not experience thermal runaway.

In the second implementation mode, if the temperature rise rate is greater than or equal to the preset rate, or the highest temperature is greater than or equal to the preset temperature, or the temperature difference is greater than or equal to the preset temperature difference, and the combustible gas concentration is greater than or equal to the gas preset concentration, And the smoke concentration is less than the smoke preset concentration, determine the level of early warning as the second level early warning, the alarm module uploads the early warning prompt information to the background or cloud platform to remind the maintenance personnel, at the same time, the maintenance personnel can manually start the fire extinguishing agent bottle group 44, so that the fire extinguishing agent bottle The perfluorohexanone fire extinguishing agent in group 44 is sprayed to each module of the battery cluster in the thermal runaway area through the main pipe, solenoid valve, branch pipe, and atomizing nozzle in the fire extinguishing agent delivery system 41, submerging the fire point.

In the third implementation mode, if the temperature rise rate is greater than or equal to the preset rate, or, the highest temperature is greater than or equal to the preset temperature, or, the temperature difference is greater than or equal to the preset temperature difference, and the combustible gas concentration is greater than or equal to the gas preset concentration, And the smoke concentration is greater than or equal to the smoke preset concentration, and the early warning level is determined to be three-level early warning, the alarm module uploads the fire early warning information to the fire control host 40, and the fire control host locates the thermal runaway area according to the fire early warning information, and automatically starts the fire extinguishing agent bottle group 44, The perfluorohexanone fire extinguishing agent in the fire extinguishing agent bottle group 44 is sprayed to each module of the battery cluster in the thermal runaway through the main pipeline in the fire extinguishing agent delivery system 41, the solenoid valve, the branch pipe, and the atomizing nozzle, so as to ensure that the fire extinguishing agent can Spray in the whole area, submerge the fire point, and have the effect of quickly extinguishing the fire.

Wherein, the battery container can also be provided with an audible and visual alarm and a gas spraying indicator light. After the fire control host 40 receives the fire alarm information, it can turn on the audible and visual alarm and the gas spraying indicator light to remind the on-site maintenance personnel, Open fire extinguishing agent bottle group 44 after setting time, like this, can reserve time for maintenance personnel to leave, guarantee the safety of maintenance personnel.

On the basis of the above description, as shown in Figure 7, a schematic diagram of the principle of a three-time fire extinguishing strategy is provided, wherein the three-time fire extinguishing strategy includes a primary fire extinguishing strategy, a secondary fire extinguishing strategy and a water fire extinguishing strategy, wherein the primary fire extinguishing strategy and the secondary fire extinguishing strategy are used to indicate the strategy of using the fire extinguishing agent in the fire extinguishing agent bottle set 44 to extinguish the fire, and the water fire extinguishing strategy is used to indicate the strategy of using the water fire fighting interface in the battery container to carry out water fire extinguishing; Perfluorohexanone fire extinguishing agent.

When the alarm module determines that the warning level is a three-level warning, the alarm module uploads the fire warning information to the fire-fighting host, and the fire-fighting host starts the fire-extinguishing agent bottle group to extinguish the fire of each battery module. The fire extinguishing agent in the bottle group is sprayed to each battery module of the battery cluster in the thermal runaway through the main pipeline, solenoid valve, branch pipeline and atomizing nozzle in the fire extinguishing agent delivery system, so as to extinguish the fire of each battery module and realize the protection of the entire battery. The cluster is fully submerged, the fire extinguishing strategy described above is a one-time fire-fighting strategy, and the number of times the fire extinguisher group is activated in one fire-fighting strategy is one time.

After starting the fire extinguishing agent bottle group to extinguish the fire of each battery module, the fire host can obtain the concentration of the fire extinguishing agent sprayed by the fire extinguishing agent bottle group in the battery container. If the concentration of the fire extinguishing agent is greater than or equal to the preset fire extinguishing agent concentration, turn off the fire extinguishing bottle group, and instruct the alarm module to reacquire the temperature rise rate, temperature difference and maximum temperature of each cell. If within the preset time, the reacquired temperature rise rate is greater than or equal to the preset rate, or the reacquired maximum temperature If the temperature is greater than or equal to the preset temperature, or the temperature difference obtained again is greater than or equal to the preset temperature difference, it can be judged that the fire is not completely extinguished. Therefore, the fire fighting host continues to activate the fire extinguishing agent bottle group to extinguish the fire of each battery module; or, the maintenance personnel When it is judged by the camera that the fire has not been completely extinguished, that is, when the maintenance personnel judges that there is a risk of resurgence, the operation and maintenance personnel can activate the manual start button, or the fire host can activate the fire extinguishing agent bottle group to extinguish the fire of each battery module. The fire extinguishing strategy described above It is the secondary fire extinguishing strategy, and the number of times to start the fire extinguisher group in the secondary fire extinguishing strategy is 2 times.

Among them, if the concentration of the fire extinguishing agent is greater than or equal to the preset fire extinguishing agent concentration, it can be understood that the fire extinguishing agent concentration meets the standard requirements, then the spraying can be stopped; if the temperature rise rate is lower than the preset rate, or the highest temperature is lower than the preset temperature, Or, if the temperature difference is less than the preset temperature difference, it is judged that there is no risk of re-ignition, and the fire extinguishing can be ended; or, when the operation and maintenance personnel judge that there is no risk of re-ignition through the camera, the fire extinguishing can also be ended. The camera can be an infrared camera or Other types of cameras.

Among them, the manual start button is configured on the fire engine, and the fire engine can also be equipped with a manual stop button and an emergency stop button. Regardless of the state of the fire alarm system, press the emergency start button, and the fire alarm system will activate the sound and light alarm and The gas spraying indicator light, and after a delay of 30 seconds, start the fire extinguishing agent bottle group, press the emergency stop button at this time, the fire warning system will not start the fire extinguishing agent bottle group, and turn off the sound and light alarm and the gas spraying indicator light , Gas spray indicator light.

After the fire extinguishing agent bottle group is activated for the second time to extinguish the fire of each battery module, the temperature rise rate, temperature difference and maximum temperature of each battery cell are reacquired again. If within the preset time, the reacquired temperature rise rate is greater than or equal to the preset rate, or, the reacquired maximum temperature is greater than or equal to the preset temperature, or, the reacquired temperature difference is greater than or equal to the preset temperature difference, and the resurgence risk is judged, and the alarm module can send a resurgence prompt message to the fire host, and the fire host is turned off Fire extinguishing agent bottle group, and open the water fire fighting interface in the battery container to extinguish the battery container with water. The fire extinguishing strategy described above is the water fire extinguishing strategy, and the number of times to start the fire extinguisher group in the water fire extinguishing strategy is 2 times.

Among them, when starting the water fire-fighting strategy, it can be judged whether the fire truck is in place. If the fire truck is in place, the fire water bag can be connected to the water fire-fighting interface in the battery container to supply water to the battery container. If the fire truck If it is not in place, you can continue to use the fire extinguishing agent to extinguish the fire; or, you can also pre-install the water fire hydrant to the safe area in advance. The fire-fighting interface is connected to the fire-fighting pipe and injected with water.

Among them, when judging whether the fire extinguishing strategy is a water fire extinguishing strategy, if within the preset time, the re-acquired temperature rise rate is less than the preset rate, or, the re-acquired maximum temperature is less than the preset temperature, or, the re-acquired temperature difference If it is less than the preset temperature difference, it is judged that there is no risk of re-ignition, and the fire extinguishing can be ended; or, when the operation and maintenance personnel judge that there is no risk of re-ignition through the camera, the fire extinguishing can also be ended.

Combining the three fire extinguishing strategies described above, it can be understood that if the number of times the fire extinguishing agent bottle group is activated exceeds the preset number of times, the fire fighting host can activate the water fire fighting strategy. Specifically, if the number of times the fire extinguishing agent bottle group is activated exceeds the preset number of times, The alarm module determines the risk of resurgence, and the alarm module can send a resurgence prompt message to the fire host through the photoelectric conversion module, then the fire host can close the fire extinguishing agent bottle group, and open the water fire interface in the battery container to extinguish the battery container with water. For example, the preset number of times is 2 times or other values, and the specific value of the preset number of times can be set according to the actual application scenario, which is not specifically limited in this application.

It is understandable that when the fire control host receives fire warning information or re-ignition prompt information, it can cut off the system power supply, keep the emergency power supply, and turn off the air conditioner and fan.

In combination with the above, the fire warning system of the high-voltage cascaded battery system provided by this application can be used in container-type energy storage systems, and can also be used in indoor energy storage systems. On the one hand, by integrating temperature probes, smoke detectors, The combustible gas detector can monitor the condition of the battery in real time, detect abnormal conditions such as short circuit and heat generation early, and eliminate fire hazards in the bud; analyze the battery temperature data and voltage data with the BMS in real time, and communicate with the fire control system controller once an abnormality is found , and then start the fire extinguishing agent bottle group and cause a communication delay method, the temperature probe directly collects the temperature data of each battery cell and uploads the temperature data to the alarm module, avoiding the delay caused by the communication forwarding between the BMS and the fire protection system; Real-time detection of the temperature inside the corresponding battery module by the temperature probe of each battery cell can realize multiple fire extinguishing; on the other hand, an alarm module is configured in each battery cluster to receive the data uploaded by the smoke detector and combustible gas detector, Carrying out hierarchical early warning, early detection, early warning, and early suppression can avoid the spread of dangerous situations; on the other hand, based on the temperature probe and the camera inside the container, the fire situation in the container can be monitored in real time, and the fire extinguishing can be activated multiple times, combined with the water fire protection interface to realize multiple put out the fire.

Combining the above content, as shown in Figure 8, a flow diagram of a fire warning method for a high-voltage cascaded battery system is provided, which may include the following steps:

S802. Obtain smoke data, combustible gas data of each battery module in the battery cluster, and temperature data of each battery cell in each battery module.

S804, if it is judged that the warning level is a preset level according to the smoke data of each battery module, the combustible gas data of each battery module and the temperature data of each battery cell, start the fire extinguishing agent bottle set to extinguish the fire of each battery module.

S806. After activating the fire extinguishing agent bottle group to extinguish the fire of each battery module, if it is judged that there is a risk of re-ignition, extinguish the fire with water on the battery container; the battery cluster is arranged in the battery container.

Wherein, for the specific content of S802 to S806, reference may be made to the foregoing content to adapt to the description, and details are not repeated here.

To sum up, in the embodiment shown in Fig. 8, by obtaining the smoke data and combustible gas data of each battery module in the battery cluster and the temperature data of each battery cell in each battery module, if the smoke data of each battery module , the combustible gas data of each battery module and the temperature data of each battery cell, judge that the early warning level is the preset level, start the fire extinguishing agent bottle group to extinguish the fire of each battery module, and start the fire extinguishing agent bottle group to extinguish the fire of each battery module. , if it is judged that there is a re-ignition risk, the battery container is extinguished with water. In this way, the precise control of the fire extinguishing process can be realized through different judgment conditions, so that the accuracy of fire extinguishing can be improved.

In one of the embodiments, the temperature data of each battery cell includes temperature rise rate, temperature difference and maximum temperature, the combustible gas data of each battery module includes combustible gas concentration, and the smoke data of each battery module includes smoke concentration. The smoke data of each battery module, the flammable gas data of each battery module, and the temperature data of each battery cell determine that the warning level is the preset level, including:

If the rate of temperature rise is greater than or equal to the preset rate, or the temperature difference is greater than or equal to the preset temperature difference, or the highest temperature is greater than or equal to the preset temperature, the concentration of combustible gas is greater than or equal to the preset concentration of gas, and the concentration of smoke is greater than or equal to that of smoke The preset concentration is determined as the preset level, and the preset level is the third-level warning.

In one of the embodiments, as shown in FIG. 9 , there is provided a schematic flow chart of water extinguishing the battery container after starting the fire extinguishing agent bottle group to extinguish the fire of each battery module, if it is judged that there is a risk of re-ignition, wherein, The temperature data of each cell includes temperature rise rate, temperature difference and maximum temperature, which may include the following steps:

S902. Acquire the concentration of the fire extinguishing agent sprayed by the fire extinguishing agent bottle set in the battery container after starting the fire extinguishing agent bottle set to extinguish the fire of each battery module.

S904, if the concentration of the fire extinguishing agent is greater than or equal to the preset concentration of the fire extinguishing agent, close the fire extinguishing agent bottle group, and reacquire the temperature rise rate, temperature difference and maximum temperature of each battery cell.

S906, if within the preset time, the reacquired temperature rise rate is greater than or equal to the preset rate, or, the reacquired maximum temperature is greater than or equal to the preset temperature, or, the reacquired temperature difference is greater than or equal to the preset temperature difference, continue Start the fire extinguishing agent bottle group to extinguish the fire of each battery module.

S908, if the number of times of starting the fire extinguishing agent bottle set exceeds the preset number of times, it is determined that the risk of re-ignition occurs, the fire extinguishing agent bottle set is closed, and the water fire-fighting interface in the battery container is opened to extinguish the battery container with water.

Wherein, for the specific content of S902 to S908, reference may be made to the foregoing content to adapt to the description, and details are not repeated here.

In one of the embodiments, after activating the fire extinguishing agent bottle set to extinguish the fire of each battery module, if it is judged that there is a risk of re-ignition, the battery container is extinguished with water, including: after activating the fire extinguishing agent bottle set to extinguish the fire of each battery module , to obtain the image data in the battery container; if it is determined based on the image data that there is a risk of re-ignition, open the water fire-fighting interface in the battery container to extinguish the battery container with water.

In one of the embodiments, after activating the fire extinguishing agent bottle set to extinguish the fire of each battery module, if it is judged that there is a risk of re-ignition, the battery container is extinguished with water, including: after activating the fire extinguishing agent bottle set to extinguish the fire of each battery module , if the control instruction is received, it is determined that the risk of re-ignition occurs, and the water fire-fighting interface in the battery container is opened to extinguish the battery container with water.

Among them, the maintenance personnel can judge whether there is a risk of re-ignition through the camera. If the maintenance personnel judges that there is a risk of re-ignition through the camera, they can turn on the manual start button. In this way, the fire control host can receive the control command, so that the water in the battery container can be turned on. The firefighting interface performs water extinguishing on the battery container.

It should be understood that although the steps in the flow charts involved in the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed sequentially in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least some of the steps in the flow charts involved in the above-mentioned embodiments may include multiple steps or stages, and these steps or stages are not necessarily executed at the same time, but may be performed at different times For execution, the execution order of these steps or stages is not necessarily performed sequentially, but may be executed in turn or alternately with other steps or at least a part of steps or stages in other steps.

Based on the same inventive concept, an embodiment of the present application also provides a fire warning device for a high-voltage cascaded battery system for realizing the fire warning method for a high-voltage cascaded battery system mentioned above. The solution to the problem provided by the device is similar to the implementation described in the above method, so the specific limitations in the embodiments of the fire warning device for one or more high-voltage cascaded battery systems provided below can be referred to above for The limitation of the fire warning method for the high-voltage cascaded battery system will not be repeated here.

In one embodiment, as shown in FIG. 10 , a fire warning device for a high-voltage cascaded battery system is provided, including: an acquisition module 1002, a fire extinguishing agent module 1004, and a water fire module 1006, wherein:

The acquiring module 1002 is configured to acquire smoke data and combustible gas data of each battery module in the battery cluster, and temperature data of each battery cell in each battery module.

The fire extinguishing agent fire extinguishing module 1004 is used for judging that the warning level is a preset level based on the smoke data of each battery module, the combustible gas data of each battery module and the temperature data of each battery cell, and starting the fire extinguishing agent bottle set to carry out the fire on each battery module. Extinguishing.

The water fire extinguishing module 1006 is used to extinguish the fire of the battery container with water if it is judged that there is a risk of re-ignition after starting the fire extinguishing agent bottle set to extinguish the fire of each battery module; the battery cluster is arranged in the battery container.

In one of the embodiments, the temperature data of each battery cell includes temperature rise rate, temperature difference and maximum temperature, the combustible gas data of each battery module includes combustible gas concentration, the smoke data of each battery module includes smoke concentration, fire extinguishing agent fire extinguishing module, It is also used if the temperature rise rate is greater than or equal to the preset rate, or the temperature difference is greater than or equal to the preset temperature difference, or the highest temperature is greater than or equal to the preset temperature, the concentration of combustible gas is greater than or equal to the preset concentration of gas, and the smoke concentration is greater than Or equal to the smoke preset concentration, determine the warning level as the preset level.

In one of the embodiments, the water fire extinguishing module is also used to obtain the concentration of the fire extinguishing agent sprayed by the fire extinguishing agent bottle group in the battery container after starting the fire extinguishing agent bottle group to extinguish the fire of each battery module; if the concentration of the fire extinguishing agent is greater than or equal to the preset fire extinguishing agent concentration, close the fire extinguishing agent bottle group, and reacquire the temperature rise rate, temperature difference and maximum temperature of each cell; the temperature data of each cell includes the temperature rise rate, temperature difference and maximum temperature; If the reacquired temperature rise rate is greater than or equal to the preset rate, or, the reacquired highest temperature is greater than or equal to the preset temperature, or, the reacquired temperature difference is greater than or equal to the preset temperature difference, continue to start the fire extinguishing agent bottle group Each battery module is used for fire extinguishing; if the number of times the fire extinguishing agent bottle group is activated exceeds the preset number of times, it is determined that there is a risk of re-ignition, the fire extinguishing agent bottle group is closed, and the water fire-fighting interface in the battery container is opened to extinguish the battery container with water.

In one of the embodiments, the water fire extinguishing module is also used to obtain the image data in the battery container after starting the fire extinguishing agent bottle group to extinguish the fire of each battery module; The water fire-fighting interface of the battery container is used to extinguish the fire with water.

In one of the embodiments, the water fire extinguishing module is also used to start the fire extinguishing agent bottle group to extinguish the fire of each battery module, if a control instruction is received, it is determined that there is a risk of re-ignition, and the water fire-fighting interface in the battery container is opened. The container is water extinguished.

Each module in the fire warning device of the above-mentioned high-voltage cascaded battery system can be fully or partially realized by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, and can also be stored in the memory of the computer device in the form of software, so that the processor can invoke and execute the corresponding operations of the above-mentioned modules.

In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure may be as shown in FIG. 11 . The computer device includes a processor, memory and a network interface connected by a system bus. Wherein, the processor of the computer device is used to provide calculation and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer programs and databases. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The database of the computer equipment is used to store temperature data, smoke data and combustible gas data. The network interface of the computer device is used to communicate with an external terminal via a network connection. When the computer program is executed by a processor, a fire warning method for a high-voltage cascaded battery system is realized.

Those skilled in the art can understand that the structure shown in Figure 11 is only a block diagram of a part of the structure related to the solution of this application, and does not constitute a limitation on the computer equipment on which the solution of this application is applied. The specific computer equipment can be More or fewer components than shown in the figures may be included, or some components may be combined, or have a different arrangement of components.

In one embodiment, a computer device is provided, including a memory and a processor, a computer program is stored in the memory, and the processor implements the following steps when executing the computer program:

Obtain the smoke data and combustible gas data of each battery module in the battery cluster and the temperature data of each cell in each battery module;

If according to the smoke data of each battery module, the combustible gas data of each battery module and the temperature data of each battery cell, it is judged that the warning level is the preset level, and the fire extinguishing agent bottle group is started to extinguish the fire of each battery module;

After starting the fire extinguishing agent bottle group to extinguish the fire of each battery module, if it is judged that there is a risk of re-ignition, the battery container is used to extinguish the fire with water; the battery cluster is arranged in the battery container.

In one embodiment, the temperature data of each battery cell includes temperature rise rate, temperature difference and maximum temperature, the combustible gas data of each battery module includes combustible gas concentration, the smoke data of each battery module includes smoke concentration, and when the processor executes the computer program Also implement the following steps:

If the rate of temperature rise is greater than or equal to the preset rate, or the temperature difference is greater than or equal to the preset temperature difference, or the highest temperature is greater than or equal to the preset temperature, the concentration of combustible gas is greater than or equal to the preset concentration of gas, and the concentration of smoke is greater than or equal to that of smoke Preset concentration, determine the warning level as the preset level.

In one embodiment, the following steps are also implemented when the processor executes the computer program:

After starting the fire extinguishing agent bottle group to extinguish the fire of each battery module, obtain the concentration of the fire extinguishing agent sprayed by the fire extinguishing agent bottle group in the battery container;

If the concentration of the fire extinguishing agent is greater than or equal to the preset fire extinguishing agent concentration, close the fire extinguishing agent bottle group, and reacquire the temperature rise rate, temperature difference and maximum temperature of each cell; the temperature data of each cell includes the temperature rise rate, temperature difference and maximum temperature. temperature;

If within the preset time, the reacquired temperature rise rate is greater than or equal to the preset rate, or, the reacquired maximum temperature is greater than or equal to the preset temperature, or, the reacquired temperature difference is greater than or equal to the preset temperature difference, continue to start fire extinguishing The agent bottle group is used to extinguish the fire of each battery module;

If the number of times the fire extinguishing agent bottle group is activated exceeds the preset number of times, it is determined that the risk of re-ignition occurs, the fire extinguishing agent bottle group is closed, and the water fire-fighting interface in the battery container is opened to extinguish the battery container with water.

In one embodiment, the following steps are also implemented when the processor executes the computer program:

After starting the fire extinguishing agent bottle group to extinguish the fire of each battery module, obtain the image data in the battery container;

If it is determined based on the image data that there is a risk of re-ignition, open the water fire-fighting interface in the battery container to extinguish the battery container with water.

In one embodiment, the following steps are also implemented when the processor executes the computer program:

After starting the fire extinguishing agent bottle group to extinguish the fire of each battery module, if the control command is received, it is determined that there is a risk of re-ignition, and the water fire-fighting interface in the battery container is opened to extinguish the battery container with water.

In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

Obtain the smoke data and combustible gas data of each battery module in the battery cluster and the temperature data of each cell in each battery module;

If according to the smoke data of each battery module, the combustible gas data of each battery module and the temperature data of each battery cell, it is judged that the warning level is a preset level, and the fire extinguishing agent bottle group is activated to extinguish the fire of each battery module;

After starting the fire extinguishing agent bottle group to extinguish the fire of each battery module, if it is judged that there is a risk of re-ignition, the battery container is used to extinguish the fire with water; the battery cluster is arranged in the battery container.

In one embodiment, the temperature data of each battery cell includes temperature rise rate, temperature difference and maximum temperature, the combustible gas data of each battery module includes combustible gas concentration, the smoke data of each battery module includes smoke concentration, and the computer program is executed by the processor Also implement the following steps:

If the rate of temperature rise is greater than or equal to the preset rate, or the temperature difference is greater than or equal to the preset temperature difference, or the highest temperature is greater than or equal to the preset temperature, the concentration of combustible gas is greater than or equal to the preset concentration of gas, and the concentration of smoke is greater than or equal to that of smoke Preset concentration, determine the warning level as the preset level.

In one embodiment, when the computer program is executed by the processor, the following steps are also implemented:

After starting the fire extinguishing agent bottle group to extinguish the fire of each battery module, obtain the concentration of the fire extinguishing agent sprayed by the fire extinguishing agent bottle group in the battery container;

If the concentration of the fire extinguishing agent is greater than or equal to the preset fire extinguishing agent concentration, close the fire extinguishing agent bottle group, and reacquire the temperature rise rate, temperature difference and maximum temperature of each cell; the temperature data of each cell includes the temperature rise rate, temperature difference and maximum temperature. temperature;

If within the preset time, the reacquired temperature rise rate is greater than or equal to the preset rate, or, the reacquired maximum temperature is greater than or equal to the preset temperature, or, the reacquired temperature difference is greater than or equal to the preset temperature difference, continue to start fire extinguishing The agent bottle group is used to extinguish the fire of each battery module;

If the number of times the fire extinguishing agent bottle group is activated exceeds the preset number of times, it is determined that the risk of re-ignition occurs, the fire extinguishing agent bottle group is closed, and the water fire-fighting interface in the battery container is opened to extinguish the battery container with water.

In one embodiment, when the computer program is executed by the processor, the following steps are also implemented:

After starting the fire extinguishing agent bottle group to extinguish the fire of each battery module, obtain the image data in the battery container;

If it is determined based on the image data that there is a risk of re-ignition, open the water fire-fighting interface in the battery container to extinguish the battery container with water.

In one embodiment, when the computer program is executed by the processor, the following steps are also implemented:

After starting the fire extinguishing agent bottle group to extinguish the fire of each battery module, if the control command is received, it is determined that there is a risk of re-ignition, and the water fire-fighting interface in the battery container is opened to extinguish the battery container with water.

In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:

Obtain the smoke data and combustible gas data of each battery module in the battery cluster and the temperature data of each cell in each battery module;

If according to the smoke data of each battery module, the combustible gas data of each battery module and the temperature data of each battery cell, it is judged that the warning level is a preset level, and the fire extinguishing agent bottle group is activated to extinguish the fire of each battery module;

After starting the fire extinguishing agent bottle group to extinguish the fire of each battery module, if it is judged that there is a risk of re-ignition, the battery container is used to extinguish the fire with water; the battery cluster is arranged in the battery container.

In one embodiment, the temperature data of each battery cell includes temperature rise rate, temperature difference and maximum temperature, the combustible gas data of each battery module includes combustible gas concentration, the smoke data of each battery module includes smoke concentration, and the computer program is executed by the processor Also implement the following steps:

If the rate of temperature rise is greater than or equal to the preset rate, or the temperature difference is greater than or equal to the preset temperature difference, or the highest temperature is greater than or equal to the preset temperature, the concentration of combustible gas is greater than or equal to the preset concentration of gas, and the concentration of smoke is greater than or equal to that of smoke Preset concentration, determine the warning level as the preset level.

In one embodiment, when the computer program is executed by the processor, the following steps are also implemented:

After starting the fire extinguishing agent bottle group to extinguish the fire of each battery module, obtain the concentration of the fire extinguishing agent sprayed by the fire extinguishing agent bottle group in the battery container;

If the concentration of the fire extinguishing agent is greater than or equal to the preset fire extinguishing agent concentration, close the fire extinguishing agent bottle group, and reacquire the temperature rise rate, temperature difference and maximum temperature of each cell; the temperature data of each cell includes the temperature rise rate, temperature difference and maximum temperature. temperature;

If within the preset time, the reacquired temperature rise rate is greater than or equal to the preset rate, or, the reacquired maximum temperature is greater than or equal to the preset temperature, or, the reacquired temperature difference is greater than or equal to the preset temperature difference, continue to start fire extinguishing The agent bottle group is used to extinguish the fire of each battery module;

If the number of times the fire extinguishing agent bottle group is activated exceeds the preset number of times, it is determined that the risk of re-ignition occurs, the fire extinguishing agent bottle group is closed, and the water fire-fighting interface in the battery container is opened to extinguish the battery container with water.

In one embodiment, when the computer program is executed by the processor, the following steps are also implemented:

After starting the fire extinguishing agent bottle group to extinguish the fire of each battery module, obtain the image data in the battery container;

If it is determined based on the image data that there is a risk of re-ignition, open the water fire-fighting interface in the battery container to extinguish the battery container with water.

In one embodiment, when the computer program is executed by the processor, the following steps are also implemented:

After starting the fire extinguishing agent bottle group to extinguish the fire of each battery module, if the control command is received, it is determined that there is a risk of re-ignition, and the water fire-fighting interface in the battery container is opened to extinguish the battery container with water.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented through computer programs to instruct related hardware, and the computer programs can be stored in a non-volatile computer-readable memory In the medium, when the computer program is executed, it may include the processes of the embodiments of the above-mentioned methods. Wherein, any reference to storage, database or other media used in the various embodiments provided in the present application may include at least one of non-volatile and volatile storage. Non-volatile memory can include read-only memory (Read-Only Memory, ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive variable memory (ReRAM), magnetic variable memory (Magnetoresistive Random Access Memory, MRAM), Ferroelectric Random Access Memory (FRAM), Phase Change Memory (Phase Change Memory, PCM), graphene memory, etc. The volatile memory may include random access memory (Random Access Memory, RAM) or external cache memory. As an illustration and not a limitation, the RAM can be in various forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM). The databases involved in the various embodiments provided in this application may include at least one of a relational database and a non-relational database. The non-relational database may include a blockchain-based distributed database, etc., but is not limited thereto. The processors involved in the various embodiments provided by this application can be general-purpose processors, central processing units, graphics processors, digital signal processors, programmable logic devices, data processing logic devices based on quantum computing, etc., and are not limited to this.

The technical features of the above embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be It is considered to be within the range described in this specification.

The above-mentioned embodiments only express several implementation modes of the present application, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be determined by the appended claims.

Claims (10)

1. A fire warning method for a high-voltage cascaded battery system, characterized in that it comprises: Obtain smoke data, combustible gas data of each battery module in the battery cluster, and temperature data of each cell in each battery module; If according to the smoke data of each of the battery modules, the combustible gas data of each of the battery modules, and the temperature data of each of the battery cells, it is judged that the warning level is a preset level, and the fire extinguishing agent bottle group is started to carry out the fire on each of the battery modules. Extinguishing; After activating the fire extinguishing agent bottle set to extinguish the fire of each of the battery modules, if it is judged that there is a risk of re-ignition, the battery container is extinguished with water; the battery cluster is arranged in the battery container. 2. The method according to claim 1, wherein the temperature data of each battery cell includes temperature rise rate, temperature difference and maximum temperature, the combustible gas data of each battery module includes combustible gas concentration, and each of the The smoke data of the battery module includes the smoke concentration, and if according to the smoke data of each of the battery modules, the combustible gas data of each of the battery modules, and the temperature data of each of the battery cells, it is judged that the warning level is a preset level, including : If the temperature rise rate is greater than or equal to the preset rate, or the temperature difference is greater than or equal to the preset temperature difference, or the highest temperature is greater than or equal to the preset temperature, and the concentration of the combustible gas is greater than or equal to the preset gas concentration , and the smoke concentration is greater than or equal to a smoke preset concentration, and the warning level is determined as the preset level. 3. The method according to claim 1, characterized in that, after starting the fire extinguishing agent bottle set to extinguish the fire of each of the battery modules, if it is judged that there is a risk of re-ignition, extinguishing the battery container with water includes: : After starting the fire extinguishing agent bottle set to extinguish the fire of each of the battery modules, obtain the concentration of the fire extinguishing agent sprayed by the fire extinguishing agent bottle set in the battery container; If the concentration of the fire extinguishing agent is greater than or equal to the preset fire extinguishing agent concentration, close the fire extinguishing agent bottle group, and reacquire the temperature rise rate, temperature difference and maximum temperature of each of the batteries; the temperature data of each of the batteries Including said temperature rise rate, said temperature difference and said maximum temperature; If within the preset time, the reacquired temperature rise rate is greater than or equal to the preset rate, or, the reacquired maximum temperature is greater than or equal to the preset temperature, or, the reacquired temperature difference is greater than or equal to the preset Set the temperature difference, and continue to start the fire extinguishing agent bottle group to extinguish the fire of each of the battery modules; If the number of times of starting the fire extinguishing agent bottle set exceeds the preset number of times, it is determined that the risk of re-ignition occurs, the fire extinguishing agent bottle set is closed, and the water fire-fighting interface in the battery container is opened to extinguish the battery container with water. 4. The method according to claim 1, characterized in that, after starting the fire extinguishing agent bottle group to extinguish the fire of each of the battery modules, if it is judged that there is a risk of re-ignition, extinguishing the battery container with water includes: : After starting the fire extinguishing agent bottle set to extinguish the fire of each of the battery modules, acquiring image data in the battery container; If it is determined according to the image data that the risk of re-ignition occurs, the water fire-fighting interface in the battery container is opened to extinguish the battery container with water. 5. The method according to claim 1, wherein after starting the fire extinguishing agent bottle set to extinguish the fire of each of the battery modules, if it is judged that there is a risk of re-ignition, the battery container is extinguished with water, including : After activating the fire extinguishing agent bottle set to extinguish the fire of each of the battery modules, if a control instruction is received and it is determined that a risk of re-ignition occurs, the water fire-fighting interface in the battery container is opened to extinguish the battery container with water. 6. A fire warning system for a high-voltage cascaded battery system, characterized in that it includes: a battery container, the battery container is provided with a fire-fighting host, a battery cluster and a fire extinguishing agent bottle group, and the battery cluster includes a high-voltage box and a plurality of A battery module, smoke detectors and combustible gas detectors are installed in each battery module, temperature probes are installed in each cell in each battery module, an alarm module is installed in the high voltage box, The smoke detector is used to obtain the smoke data of each of the battery modules; The combustible gas detector is used to obtain combustible gas data of each of the battery modules; Each of the temperature probes is used to obtain the temperature data of each of the cells; The alarm module is configured to, if according to the smoke data of each of the battery modules, the combustible gas data of each of the battery modules, and the temperature data of each of the battery cells, determine that the warning level is a preset level, and report to the fire control host Sending fire alarm prompt information, so that the fire control host activates the fire extinguishing agent bottle set to extinguish the fire of each of the battery modules; The alarm module is also used to send a resurgence prompt message to the fire control host if it is judged that there is a risk of resurgence after the battery modules of the fire extinguishing agent bottle group are activated to extinguish the fire, so that the fire control host turns on The water fire-fighting interface in the battery container performs water fire extinguishing on the battery container. 7. The system according to claim 6, further comprising: a cabinet arranged in the battery cluster and a shower head arranged on the front panel of each of the battery modules, each of the battery modules is fixed on the On the cabinet, a set of main pipes and solenoid valves are laid on the top of the cabinet, multiple sets of branch pipes are fixed on the vertical beams in front of the cabinet and inside the cabinet, and one end of the solenoid valve passes through the The set of main pipelines is connected to the fire extinguishing agent bottle group, and the other end is connected to the spray head through each of the branch pipelines; The fire control host is used to open the electromagnetic valve when receiving the fire alarm message, so that the fire extinguishing agent in the fire extinguishing agent bottle set passes through the main pipeline, the electromagnetic valve, the branch pipeline and the The spray head is sprayed to each of the battery modules. 8. The system of claim 7, wherein: The solenoid valve is a normally closed solenoid valve. 9. The system of claim 7, wherein: Both the main pipe and the branch pipes are metal flexible pipes. 10. The system according to claim 6, wherein a photoelectric conversion module is also arranged in the high voltage box, The photoelectric conversion module is used for the alarm module to send the fire alarm prompt information or the resurgence prompt information to the fire control host through an optical fiber.

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