Battery pack fire control method, device, system and equipment and storage medium

Abstract

The invention provides a battery pack fire control method, device, system and equipment and a storage medium, and relates to the technical field of energy storage fire control. The method comprises the steps that battery pack environment data sent by an environment parameter acquisition unit are obtained, the environment parameter acquisition unit is arranged in a battery pack, and the battery pack environment data are environment data in the battery pack at different moments; battery cell performance data sent by the battery management system is obtained, the battery cell performance data is performance data, collected at different moments, of single battery cells in the battery pack through a performance parameter collection unit, and the performance parameter collection unit is in communication connection with the battery management system; and if the battery pack environment data and / or the battery cell performance data meet the target grade alarm condition, packet-level fire-fighting linkage control corresponding to the target grade alarm is executed, so that the alarm delay caused by a packet-level detector on a long-size battery pack far-end monitoring blind area is solved, additional hardware investment is not needed, and the whole-cycle cost is reduced.

Description

Technical Field

[0001] This disclosure relates to the field of energy storage fire protection technology, and in particular to a battery pack fire control method, a battery pack fire control device, a battery pack fire control system, electronic equipment, and a computer-readable storage medium. Background Technology

[0002] As the energy storage industry develops towards large-scale and intensive development, long-size battery packs (such as battery packs with a length of ≥2m) have become the mainstream choice for large-scale energy storage projects such as grid-side and new energy bases due to their high integration efficiency, excellent space utilization, and significant cost advantages.

[0003] In related technologies, fire suppression systems for long battery packs utilize integrated pack-level fire detectors that combine temperature, smoke, and combustible gas detection as the core monitoring component. These detectors are fixed to the front panel of the short side of the long battery pack. However, this detection method suffers from blind spots in remote areas and significant delays in temperature alarms. Summary of the Invention

[0004] This disclosure provides a battery pack fire control method, device, system, equipment, and storage medium, which at least to some extent overcomes the problem of large temperature alarm delay in remote area monitoring blind spots in fire control methods for long-size battery packs in related technologies.

[0005] Other features and advantages of this disclosure will become apparent from the following detailed description, or may be learned in part by practice of this disclosure.

[0006] According to one aspect of this disclosure, a battery pack fire control method is provided, comprising: acquiring battery pack environmental data sent by an environmental parameter acquisition unit, wherein the environmental parameter acquisition unit is disposed within the battery pack, and the battery pack environmental data is environmental data within the battery pack at different times; acquiring cell performance data sent by a battery management system, wherein the cell performance data is performance data of individual cells within the battery pack collected at different times by a performance parameter acquisition unit, wherein the performance parameter acquisition unit is communicatively connected to the battery management system; and if the battery pack environmental data and / or the cell performance data meet the target level alarm conditions, then executing a pack-level fire linkage control corresponding to the target level alarm.

[0007] In one embodiment of this disclosure, the target level alarm conditions include a level 1 alarm condition, a level 2 alarm condition, and a level 3 alarm condition. The step of executing the pack-level fire alarm linkage control corresponding to the target level alarm if the battery pack environmental data and / or the cell performance data meet the target level alarm conditions includes: triggering a level 1 alarm if the battery pack environmental data and / or the cell performance data meet the level 1 alarm condition but not the level 2 alarm condition; triggering a level 2 alarm if the battery pack environmental data and / or the cell performance data meet the level 2 alarm condition but not the level 3 alarm condition; and triggering a level 3 alarm if the battery pack environmental data and / or the cell performance data meet the level 3 alarm condition.

[0008] In one embodiment of this disclosure, the battery pack environmental data includes at least one of the ambient temperature, smoke concentration, and combustible gas concentration within the battery pack; the cell performance data includes the cell temperature of a single cell within the battery pack.

[0009] In one embodiment of this disclosure, the first-level alarm condition includes: the cell temperature being greater than or equal to a first temperature threshold and lasting for a first duration threshold; or, the combustible gas concentration being greater than or equal to a first concentration threshold and lasting for the first duration threshold.

[0010] In one embodiment of this disclosure, the secondary alarm conditions include: the battery cell temperature being greater than or equal to a first temperature threshold and lasting for a second duration threshold, and the combustible gas concentration being greater than or equal to a second concentration threshold and lasting for a first duration threshold, wherein the second duration threshold is less than the first duration threshold; or, the battery cell temperature being greater than or equal to the first temperature threshold and the smoke concentration being greater than or equal to a third concentration threshold, lasting for the first duration threshold; or, the battery cell temperature being greater than or equal to the first temperature threshold and the ambient temperature being greater than or equal to the first temperature threshold, lasting for the first duration threshold; or, the combustible gas concentration being greater than or equal to the second concentration threshold and the smoke concentration being greater than or equal to the third concentration threshold, lasting for the first duration threshold; or, the ambient temperature being greater than or equal to the first temperature threshold and the combustible gas concentration being greater than or equal to the second concentration threshold, lasting for the first duration threshold; or, the ambient temperature being greater than or equal to the first temperature threshold and the smoke concentration being greater than or equal to the third concentration threshold, lasting for the first duration threshold.

[0011] In one embodiment of this disclosure, the three-level alarm conditions include: the battery cell temperature is greater than or equal to a first temperature threshold, the combustible gas concentration is greater than or equal to a second concentration threshold, and the smoke concentration is greater than or equal to a third concentration threshold, for a first duration threshold; or, the battery cell temperature is greater than or equal to the first temperature threshold, the combustible gas concentration is greater than or equal to the second concentration threshold, for a first duration threshold, and the ambient temperature rise is greater than a preset temperature rise threshold, for a third duration threshold, wherein the third duration threshold is less than the first duration threshold; or, the battery cell temperature is greater than or equal to the first temperature threshold, the smoke concentration is greater than or equal to the third concentration threshold, for a first duration threshold, and the ambient temperature is greater than a preset temperature rise threshold, for a third duration threshold; or, the battery cell temperature is greater than or equal to the first temperature threshold and the combustible gas concentration is greater than or equal to the second concentration threshold, for a first duration threshold, and the ambient temperature is greater than a preset temperature rise threshold, for a third duration threshold; or, the battery cell temperature is greater than or equal to the first temperature threshold and the combustible gas concentration is greater than or equal to the second concentration threshold, for a first duration threshold. The following conditions must be met: The smoke concentration is greater than or equal to the third concentration threshold and remains at the first duration threshold; the ambient temperature rise is greater than or equal to the preset temperature rise threshold and remains at the third duration threshold; or the ambient temperature is greater than or equal to the second temperature threshold and the smoke concentration is greater than or equal to the third concentration threshold, remaining at the first duration threshold; or the combustible gas concentration is greater than or equal to the second concentration threshold and the ambient temperature rise is greater than or equal to the third temperature threshold, remaining at the first duration threshold, where the third temperature threshold is greater than the second temperature threshold; or the smoke concentration is greater than or equal to the third concentration threshold and the ambient temperature rise is greater than or equal to the preset temperature rise threshold, remaining at the third duration threshold; or the combustible gas concentration is greater than or equal to the second concentration threshold and the ambient temperature rise is greater than or equal to the preset temperature rise threshold, remaining at the third duration threshold.

[0012] In one embodiment of this disclosure, the target level alarm includes the first-level alarm, and the execution of the package-level fire linkage control corresponding to the target level alarm includes: increasing the sampling frequency of the environmental parameter acquisition unit from the first sampling frequency to the second sampling frequency, increasing the sampling frequency of the performance parameter acquisition unit from the third sampling frequency to the fourth sampling frequency, and outputting a first-level alarm signal.

[0013] In one embodiment of this disclosure, the target level alarm includes the secondary alarm, and the execution of the package-level fire linkage control corresponding to the target level alarm includes: activating the alarm device and outputting a secondary alarm signal.

[0014] In one embodiment of this disclosure, the target level alarm includes the third-level alarm, and the execution of the package-level fire linkage control corresponding to the target level alarm includes: turning on the alarm device and turning off the ventilation system; controlling the opening of the column solenoid valve of the battery rack where the thermal runaway battery pack is located according to the alarm area; delaying for a fourth time threshold, controlling the activation of the fire extinguishing device to spray perfluoroacetone onto the battery pack of the battery rack where the thermal runaway battery pack is located; controlling the opening of the venting indicator light and outputting a third-level alarm signal.

[0015] According to another aspect of this disclosure, a battery pack fire control device is provided, comprising: a first acquisition module for acquiring battery pack environmental data sent by an environmental parameter acquisition unit, wherein the environmental parameter acquisition unit is disposed within the battery pack, and the battery pack environmental data is environmental data within the battery pack at different times; a second acquisition module for acquiring cell performance data sent by a battery management system, wherein the cell performance data is performance data of individual cells within the battery pack collected at different times by a performance parameter acquisition unit, wherein the performance parameter acquisition unit is communicatively connected to the battery management system; and a linkage control module for executing a pack-level fire linkage control corresponding to a target level alarm if the battery pack environmental data and / or the cell performance data meet the target level alarm conditions.

[0016] According to another aspect of this disclosure, a battery pack fire control system is provided, comprising: an environmental parameter acquisition unit disposed within the battery pack, the environmental parameter acquisition unit being used to acquire environmental data of the battery pack, the environmental data of the battery pack being environmental data within the battery pack at different times; a performance parameter acquisition unit disposed within the battery pack, the performance parameter acquisition unit being used to acquire cell performance data, the cell performance data being performance data of individual cells within the battery pack acquired by the performance parameter acquisition unit at different times; a battery management system being communicatively connected to the performance parameter acquisition unit; and a controller being electrically connected to the environmental parameter acquisition unit and the battery management system, the controller being used to acquire the battery pack environmental data sent by the environmental parameter acquisition unit and the cell performance data sent by the battery management system; if the battery pack environmental data and / or the cell performance data meet the target level alarm conditions, then executing a pack-level fire linkage control corresponding to the target level alarm.

[0017] According to another aspect of this disclosure, an electronic device is also provided, including a processor and a memory, the memory storing a computer program that, when executed by the processor, implements the battery pack fire control method of the above embodiments.

[0018] According to another aspect of this disclosure, a computer-readable storage medium is also provided, wherein a computer program is stored therein, and when executed by a processor, the computer program implements the battery pack fire control method of the above embodiments.

[0019] In this embodiment, the battery pack environmental data collected by the environmental parameter acquisition unit within the battery pack, combined with the cell performance data collected by the performance parameter acquisition unit, enables graded alarm and linkage control of the battery pack by optimizing and upgrading the alarm logic without altering the hardware structure. This effectively solves the alarm delay problem caused by blind spots in remote detection when using traditional pack-level detectors for long-size battery packs. When an abnormality occurs in the battery pack, the system can automatically trigger graded alarms and execute linkage control, significantly improving the stability and reliability of battery pack operation, saving hardware modification costs, and achieving dual optimization of technical performance and economy.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0022] Figure 1 This diagram illustrates the structure of an energy storage system provided in an embodiment of the present disclosure.

[0023] Figure 2 This diagram illustrates a flowchart of a battery pack fire control method according to an embodiment of the present disclosure.

[0024] Figure 3 This diagram illustrates another battery pack fire control method provided in an embodiment of the present disclosure.

[0025] Figure 4 This diagram illustrates a further embodiment of a battery pack fire control method provided in this disclosure.

[0026] Figure 5 A flowchart of another battery pack fire control method provided in an embodiment of this disclosure is shown.

[0027] Figure 6 This diagram illustrates an example flowchart of a battery pack fire control method provided in an embodiment of the present disclosure.

[0028] Figure 7This diagram illustrates the structure of an energy storage fire-fighting device according to an embodiment of the present disclosure.

[0029] Figure 8 This diagram illustrates the structure of an energy storage fire protection system provided in an embodiment of the present disclosure.

[0030] Figure 9 This diagram illustrates the structure of an electronic device according to an embodiment of the present disclosure. Detailed Implementation

[0031] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0032] Furthermore, the accompanying drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. Some block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0033] Because the energy we need is highly time- and space-dependent, in order to utilize energy rationally and improve energy efficiency, it is necessary to store one form of energy in the same way or by converting it into another, and then release it in a specific energy form based on future application needs. Currently, the main way to generate green electricity is to develop green energy sources such as photovoltaics and wind power to replace fossil fuels.

[0034] Currently, the generation of green electricity generally relies on solar, wind, and hydropower. However, wind and solar power are generally characterized by strong intermittency and large fluctuations, which can cause grid instability, insufficient power during peak demand periods, and excessive power during off-peak periods. Unstable voltage can also damage the power grid. Therefore, insufficient electricity demand or insufficient grid capacity may lead to the problem of "wind and solar curtailment." Solving these problems requires energy storage. This involves converting electrical energy into other forms of energy through physical or chemical means and storing it. When needed, this energy can be converted back into electrical energy and released. Simply put, energy storage is like a large "power bank," storing electrical energy when solar and wind power are abundant and releasing the stored electricity when needed.

[0035] Taking electrochemical energy storage as an example, this solution provides an energy storage device 110, which is applied to the energy storage system 100. The energy storage device 110 is equipped with a set of chemical batteries, which mainly use the chemical elements in the batteries as energy storage medium. The charging and discharging process is accompanied by the chemical reaction or change of the energy storage medium. Simply put, the electrical energy generated by wind and solar energy is stored in the chemical batteries. When the use of external electrical energy reaches its peak, the stored electrical energy is released for use, or transferred to places with a shortage of electricity for use.

[0036] Current energy storage applications are quite widespread, including generation-side energy storage, grid-side energy storage, and consumption-side energy storage. The corresponding types of energy storage devices 110 include: (1) Large-scale energy storage power stations (including multiple prefabricated energy storage modules) applied to wind power and photovoltaic power stations can help renewable energy power generation meet grid connection requirements and improve the utilization rate of renewable energy. As a high-quality active / reactive power regulation power source on the power supply side, energy storage power stations can achieve load matching of power in time and space, enhance the renewable energy absorption capacity, reduce instantaneous power changes, reduce the impact on the power grid, improve the absorption of new energy power generation, and are of great significance in power grid system backup, alleviating peak load power supply pressure and peak regulation and frequency regulation. (2) The energy storage prefabricated cabin applied on the grid side mainly functions as peak regulation, frequency regulation and grid congestion relief. In terms of peak regulation, it can realize peak shaving and valley filling of electricity load, that is, charging the energy storage battery when the electricity load is low and releasing the stored electricity during the peak electricity load period, thereby achieving a balance between power production and consumption. (3) Small energy storage cabinets applied to the electricity consumption side mainly function as self-consumption of electricity, peak-valley price arbitrage, capacity cost management, and improvement of power supply reliability. Depending on the application scenario, electricity consumption side energy storage can be divided into industrial and commercial energy storage cabinets, household energy storage devices, energy storage charging piles, etc., which are generally used in conjunction with distributed photovoltaics. Industrial and commercial users can use energy storage for peak-valley price arbitrage and capacity cost management. In the electricity market implementing peak-valley pricing, by charging the energy storage system when the electricity price is low and discharging the energy storage system when the electricity price is high, peak-valley price arbitrage can be achieved, reducing electricity costs. In addition, industrial enterprises subject to two-part tariffs can use energy storage systems to store energy during off-peak hours and discharge during peak loads, thereby reducing peak power and the maximum demand declared, achieving the goal of reducing capacity costs. Household photovoltaics with energy storage can improve the level of self-consumption of electricity. Due to high electricity prices and poor power supply stability, the demand for household photovoltaic installations is driven. Given that photovoltaic power generation occurs during the day, while user load is generally higher at night, configuring energy storage can better utilize photovoltaic power, improve self-consumption levels, and reduce electricity costs. Furthermore, energy storage is needed in areas such as communication base stations and data centers for backup power.

[0037] In some embodiments, see Figure 1 , Figure 1 This is a schematic diagram of the structure of an energy storage system 100 according to an embodiment of the present disclosure, and this application... Figure 1 The embodiments are illustrated using a shared energy storage scenario on the generation / distribution side as an example. The energy storage device in this application is not limited to a prefabricated energy storage module in a generation / distribution energy storage scenario.

[0038] This application provides an energy storage system 100, which includes: a high-voltage cable 120, a first power conversion device 130, a second power conversion device 140, and an energy storage device 110 provided in this application. In some embodiments of the power generation scenario, the second power conversion device 140 can be a wind power conversion device. Since the electricity generated by wind power conversion is volatile, random, and intermittent, the unstable electricity output by the wind power conversion device can be stored in the energy storage device through grid connection. The energy storage device is connected to the high-voltage cable 120 and outputs smooth electricity to the power consumption side of the distribution network, realizing peak shaving and frequency regulation, and ensuring stable grid operation; or, the wind power conversion device... The device is always connected to the high-voltage cable 120. Under normal power generation conditions, the power output of the wind power conversion device is supplied to the power consumption side of the distribution network through the high-voltage cable. When the current power load is low and the wind power conversion device generates excess power, the excess power is first stored in the energy storage device 110 to reduce wind and solar curtailment rates and improve the problem of new energy power generation consumption. When the power load is high, the power grid issues an instruction to transmit the power stored in the energy storage device 110 together with the high-voltage cable 120 in grid-connected mode to supply power to the power consumption side. This provides the power grid with various services such as peak shaving, frequency regulation, and backup, giving full play to the peak shaving role of the power grid, promoting peak shaving and valley filling, and alleviating the power supply pressure of the power grid.

[0039] In some embodiments on the distribution network side, the first power conversion device 130 can be a photovoltaic panel, and the energy storage device 110 is connected to the high-voltage cable 120 and installed downstream of the high-voltage cable 120 between the user load and the user load. The electrical energy output by the photovoltaic panel is stored in the energy storage device 110, which can respond in a timely manner to act as a backup power source when the power grid / distribution network fails; or, it can provide power supply support to alleviate line congestion when the high-voltage cable 120 transmission line is blocked, and to delay the economic pressure caused by the expansion of the power grid / distribution capacity when the power grid is planned to be expanded.

[0040] Optionally, the first power conversion device 130 may include, but is not limited to, a photovoltaic panel, and the second power conversion device 140 may include, but is not limited to, a wind power conversion device. The first power conversion device 130 and the second power conversion device 140 can convert at least one of solar energy, light energy, wind energy, thermal energy, tidal energy, biomass energy, and mechanical energy into electrical energy.

[0041] Optionally, the energy storage device 110 may include, but is not limited to, energy storage applications such as energy storage power stations, hydropower / thermal / wind power generation systems, solar power generation systems, mobile power systems, smart home systems, or temporary power supply systems, and may also be applied in multiple fields such as data centers, military equipment, aerospace, charging piles, and electric vehicles.

[0042] Optionally, the energy storage device 110 may include battery modules, battery packs, battery clusters, mobile power supplies, energy storage cabinets / prefabricated energy storage compartments, and other battery integrated systems composed of individual battery cells. The actual application form of the energy storage device 110 provided in this application embodiment may be, but is not limited to, the listed products, and may also be other application forms. This application embodiment does not strictly limit the application form of the energy storage device 110.

[0043] Alternatively, the individual battery cell is not limited to at least one of cylindrical, prismatic, prismatic, or other shaped batteries.

[0044] Optionally, the individual battery cell can be a rechargeable battery, which refers to a single battery cell that can be recharged after discharge to activate the active materials and continue to be used. The individual battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this application does not specifically limit its type.

[0045] During use, individual battery cells may be damaged by high temperatures or even catch fire and explode. Therefore, fire detection and safety protection of the battery pack are required through a fire protection system.

[0046] In related technologies, current fire protection systems for long-sized battery packs use a battery pack-level composite fire detector that integrates monitoring functions such as temperature, smoke, and combustible gas concentration as the core monitoring component. Due to the sealed structure of the battery pack, internal space limitations, and the need for convenient subsequent maintenance, this composite fire detector is fixedly installed on the front panel of the short side of the long-sized battery pack. By monitoring environmental parameters inside the battery pack (such as ambient temperature, smoke concentration, and combustible gas concentration), an alarm is triggered when the environmental parameters exceed a pre-configured threshold.

[0047] However, the aforementioned mounting method for the composite fire detector leaves a blind spot within long battery packs, where the distance to the detector exceeds 1 meter and can reach up to 2.5 meters. In these blind spots, the temperature response relies entirely on the air or the thermal conduction process of individual battery cells, resulting in a temperature alarm delay exceeding 30 seconds. This temperature alarm delay window is sufficient for a single battery cell to undergo thermal runaway, breaching its own protection and spreading to adjacent cells and eventually the entire battery pack. This can trigger a cascading thermal runaway risk from individual cells to the entire battery pack, leading to a loss of early fire suppression opportunities.

[0048] To address the alarm delay caused by the blind spot in remote monitoring of long-sized battery packs, multiple pack-level detectors can be installed in the battery pack to increase the detection range. The lifespan of pack-level detectors is typically 8-10 years. However, the sealing structure of long-sized battery packs is complex, and replacing internal detectors requires disassembling the battery pack, resulting in high operation and maintenance difficulties and costs, significantly increasing the investment throughout the life cycle. The internal battery cells in long battery packs are dense and the structure is compact. Adding additional pack-level detectors requires extra installation space, and new wiring channels need to be added externally, conflicting with the high-integration design requirements of the energy storage system. Evidently, this method is restricted by the internal installation space, hardware costs, external wiring layout, and construction costs of long-sized battery packs, making it difficult to balance the monitoring blind spot, cost, and space optimization. It does not fundamentally solve the problem of false alarms and missed alarms, and may also increase the risk of false alarms due to signal interference from multiple detectors, thus unable to achieve scale application.

[0049] To solve at least some of the above technical problems, the battery pack fire control method provided in the embodiments of the present disclosure collects battery pack environment data through an environment parameter acquisition unit in the battery pack, combines it with the cell performance data collected by a performance parameter acquisition unit, and without changing the hardware structure, optimizes and upgrades the alarm logic to achieve hierarchical alarm and linkage control of the battery pack, effectively solving the pain point of alarm delay caused by the blind spot in remote detection when using traditional pack-level detectors for long-sized battery packs. When an abnormality occurs in the battery pack, the system can automatically trigger hierarchical alarms and execute linkage control, significantly improving the stability and reliability of the battery pack operation, eliminating the hardware modification cost, and achieving double optimization of technical performance and economy.

[0050] In the embodiments of the present disclosure, a battery pack fire control method is provided, and this method can be executed by any electronic device with computing and processing capabilities, such as a controller. The controller can include a programmable logic controller (PLC) or a single-chip microcomputer, etc., as long as it can implement the corresponding functions.

[0051] Figure 2 The flowchart of a battery pack fire control method in the embodiments of the present disclosure is shown, as Figure 2 shown, the battery pack fire control method provided in the embodiments of the present disclosure includes the following steps S202~S206. Among them: <unk> S202. Obtain the battery pack environment data sent by the environment parameter acquisition unit. The environment parameter acquisition unit is set in the battery pack, and the battery pack environment data is the environment data in the battery pack at different times.

[0052] In one embodiment, the battery pack can be a long-sized battery pack. For example, a battery pack with a length ≥ 2m.

[0053] The environmental parameter acquisition unit can be a composite fire detector, installed inside the battery pack. This composite fire detector monitors environmental parameters within the battery pack, including ambient temperature, smoke concentration, and combustible gas concentration. Specifically, the battery pack environmental parameters include at least one of these three parameters. The battery pack environmental data can effectively identify abnormal conditions inside the battery pack, especially since changes in ambient temperature, smoke concentration, and combustible gas concentration are direct indicators of potential thermal runaway. Combustible gases may include, but are not limited to, carbon monoxide, hydrogen, and volatile organic compounds (VOCs). In this disclosure, carbon monoxide is used as an example of a combustible gas.

[0054] In one embodiment, the environmental parameter acquisition unit can acquire battery pack environmental parameters at a first sampling frequency, for example, the first sampling frequency is 60 Hz, that is, 60 battery pack environmental parameters are acquired per second.

[0055] S204. Obtain cell performance data sent by the battery management system. The cell performance data is the performance data of individual cells in the battery pack collected at different times by the performance parameter acquisition unit. The performance parameter acquisition unit is connected to the battery management system.

[0056] In one embodiment, the battery pack contains multiple individual battery cells connected in series and parallel. A performance parameter acquisition unit monitors the cell performance data of each individual cell, including cell temperature, cell voltage, and cell current. Cell temperature is the most direct and effective indicator of whether thermal runaway has occurred in a single cell. By monitoring cell performance data, thermal runaway in a single cell can be detected early, effectively preventing it from spreading to the entire battery pack. The performance parameter acquisition unit that collects cell temperature data can be a temperature sensor. For example, each battery pack may contain 32 individual battery cells, each equipped with a temperature sensor. Each temperature sensor collects the temperature of its corresponding individual cell and transmits it to the battery management system (BMS) via a daisy-chain configuration. The BMS can upload the cell temperatures of each individual cell to the controller via a Controller Area Network (CAN) bus, and can also report the maximum cell temperature and the identification information of the individual cell to the controller. By using multiple temperature sensors to monitor the cell temperature in different areas of a long-sized battery pack, the pain point of alarm delay caused by remote monitoring blind spots when using traditional pack-level detectors for long-sized battery packs can be solved.

[0057] A daisy-chain wiring scheme is used in this disclosure, in which M temperature sensors and a BMS are connected by cables. The specific connection method is as follows: the BMS and the first temperature sensor are connected by a cable, the first temperature sensor and the second temperature sensor are connected by a cable, the second temperature sensor and the third temperature sensor are connected by a cable, and so on, until the (M-1)th temperature sensor and the Mth temperature sensor are connected by a cable. Only adjacent temperature sensors or the BMS and the first temperature sensor communicate directly, which reduces costs.

[0058] In one embodiment, cell voltage and cell current can be used to determine whether a single cell is experiencing thermal runaway. Abnormal cell current (such as external short circuits or overcharging) can cause excessive heat to be generated instantaneously in a single cell, leading to a rapid rise in cell temperature. The performance parameter acquisition unit corresponding to cell voltage can include a voltage divider circuit, while the performance parameter acquisition unit corresponding to cell current can be a shunt or a Hall effect sensor. Excessively high cell voltage keeps the single cell under high voltage for extended periods, accelerating electrolyte side reactions and material aging, increasing the risk of fire. For example, overcharging or a battery short circuit can cause the cell temperature to spike within milliseconds, directly triggering thermal runaway in a single cell.

[0059] Cell performance data can be collected using a third sampling frequency. This third sampling frequency can be set according to actual needs and can be the same as or different from the first sampling frequency. For example, a third sampling frequency of 90Hz means that 90 data points are collected per second.

[0060] S206. If the battery pack environmental data and / or cell performance data meet the target level alarm conditions, then execute the pack-level fire linkage control corresponding to the target level alarm.

[0061] In one embodiment, target-level alarm conditions can be pre-configured in the controller. These target-level alarm conditions can be configured based on the type of battery pack environmental data and cell performance data. Multiple target-level alarm conditions can be included, with one target-level alarm condition corresponding to one alarm level. For example, in this disclosure, three alarm levels are set: Level 1 alarm, Level 2 alarm, and Level 3 alarm. Level 1 alarm corresponds to Level 1 alarm conditions, Level 2 alarm corresponds to Level 2 alarm conditions, and Level 3 alarm corresponds to Level 3 alarm conditions. Target-level alarm conditions can be a fixed value or a range of values. Higher alarm levels indicate more severe thermal runaway and more urgent corresponding battery pack-level fire alarm control.

[0062] In one embodiment, the target alarm level conditions include Level 1 alarm conditions, Level 2 alarm conditions, and Level 3 alarm conditions. In step S206 above, if the battery pack environmental data and / or cell performance data meet the target alarm level conditions, then the corresponding pack-level fire alarm linkage control is executed, including: if the battery pack environmental data and / or cell performance data meet the Level 1 alarm conditions but not the Level 2 alarm conditions, then a Level 1 alarm is triggered; if the battery pack environmental data and / or cell performance data meet the Level 2 alarm conditions but not the Level 3 alarm conditions, then a Level 2 alarm is triggered; if the battery pack environmental data and / or cell performance data meet the Level 3 alarm conditions, then a Level 3 alarm is triggered.

[0063] In this embodiment, the battery pack environmental data collected by the environmental parameter acquisition unit within the battery pack, combined with the cell performance data collected by the performance parameter acquisition unit, enables graded alarm and linkage control of the battery pack without altering the hardware structure. This effectively solves the alarm delay problem caused by blind spots in remote detection when using traditional pack-level detectors for long-size battery packs. When an abnormality occurs in the battery pack, the system can automatically trigger graded alarms and execute linkage control, significantly improving the stability and reliability of battery pack operation, saving hardware modification costs, and achieving dual optimization of technical performance and economy.

[0064] In one embodiment, the first-level alarm conditions include: the cell temperature is greater than or equal to a first temperature threshold and lasts for a first duration threshold; or, the combustible gas concentration is greater than or equal to a first concentration threshold and lasts for a first duration threshold.

[0065] In some embodiments, the first-level alarm condition may further include: the ambient temperature is greater than or equal to a first temperature threshold and lasts for a first duration threshold, or the smoke concentration is greater than or equal to a smoke concentration threshold and lasts for a first duration threshold.

[0066] The aforementioned first temperature threshold, first concentration threshold, and first duration threshold can be pre-configured in the controller, and their specific values ​​can be determined according to actual needs. For example, the first temperature threshold is 60℃, the first concentration threshold is 400ppm, the smoke concentration threshold is 0.6db / m³, and the first duration threshold is 10s.

[0067] In this embodiment, the first-level alarm conditions include: ① cell temperature ≥ 60℃ for 10 seconds; ② ambient temperature ≥ 60℃ for 10 seconds; ③ carbon monoxide concentration ≥ 400 ppm; ④ smoke concentration ≥ 0.6 dB / m³. It should be noted that any one of the above conditions must be met, and the duration of the alarm must exceed a first duration threshold to ensure the accuracy of the warning. Meeting these conditions will trigger a first-level alarm.

[0068] Figure 3This diagram illustrates another battery pack fire control method according to an embodiment of the present disclosure. Figure 3 As shown, in one embodiment, the target level alarm includes a level 1 alarm. The above-described S206 executes the packet-level fire alarm linkage control corresponding to the target level alarm, including: S2062. Increase the sampling frequency of the environmental parameter acquisition unit from the first sampling frequency to the second sampling frequency, increase the sampling frequency of the performance parameter acquisition unit from the third sampling frequency to the fourth sampling frequency, and output a first-level alarm signal.

[0069] When the battery pack environmental data or cell performance data meets the first-level alarm condition but not the second-level alarm condition, the sampling frequency of the environmental parameter acquisition unit and the performance parameter acquisition unit is increased. The values ​​of the third and fourth sampling frequencies can be determined according to actual needs, and this disclosure does not impose specific limitations on them. For example, the first sampling frequency is 60Hz, the second sampling frequency is 90Hz, the third sampling frequency is 90Hz, and the fourth sampling frequency is 120Hz.

[0070] It should be noted that after increasing the sampling frequency of the environmental parameter acquisition unit and the performance parameter acquisition unit, if the battery pack environmental data or cell performance data collected within a certain period of time does not meet the Level 1 alarm conditions, or if the battery pack environmental data or cell performance data collected consecutively fails to meet the Level 1 alarm conditions, then the sampling frequency of the environmental parameter acquisition unit will be reduced to the first sampling frequency, and the sampling frequency of the performance parameter acquisition unit will be reduced to the third sampling frequency. This indicates that the previous Level 1 alarm may have been a false alarm, and the output of the Level 1 alarm signal will be stopped. It should be noted that the duration of this period must exceed the first duration threshold.

[0071] In one embodiment, when the battery pack environmental data or cell performance data meets the first-level alarm conditions but not the second-level alarm conditions, the controller can output a first-level alarm signal to the BMS or monitoring platform in the form of passive reading via RS485 to complete the fire alarm prompt.

[0072] In one embodiment, the secondary alarm conditions include: the battery cell temperature is greater than or equal to a first temperature threshold and lasts for a second duration threshold, and the combustible gas concentration is greater than or equal to a second concentration threshold and lasts for a first duration threshold, wherein the second duration threshold is less than the first duration threshold; or, the battery cell temperature is greater than or equal to the first temperature threshold and the smoke concentration is greater than or equal to a third concentration threshold, lasting for a first duration threshold; the battery cell temperature is greater than or equal to the first temperature threshold and the ambient temperature is greater than or equal to the first temperature threshold, lasting for a first duration threshold; or, the combustible gas concentration is greater than or equal to the second concentration threshold and the smoke concentration is greater than or equal to the third concentration threshold, lasting for a first duration threshold; or, the ambient temperature is greater than or equal to the first temperature threshold and the combustible gas concentration is greater than or equal to the second concentration threshold, lasting for a first duration threshold; or, the ambient temperature is greater than or equal to the first temperature threshold and the smoke concentration is greater than or equal to the third concentration threshold, lasting for a first duration threshold.

[0073] The second concentration threshold is greater than the first concentration threshold, and the third concentration threshold is greater than or equal to the smoke concentration threshold. It should be noted that the second duration threshold, second concentration threshold, and third concentration threshold can be pre-configured in the controller, and their specific values ​​can be determined according to actual needs. For example, the second duration threshold could be 5 seconds, the second concentration threshold 800 ppm, and the third concentration threshold 0.6 dB / m³.

[0074] In this embodiment, the secondary alarm conditions include: ① Battery cell temperature ≥ 60℃ for 5 seconds and carbon monoxide concentration ≥ 800 ppm for 10 seconds; ② Battery cell temperature ≥ 60℃ for 10 seconds and smoke concentration ≥ 0.6 dB / m³ for 10 seconds; ③ Battery cell temperature ≥ 60℃ for 10 seconds and ambient temperature ≥ 60℃ for 10 seconds; ④ Carbon monoxide concentration ≥ 800 ppm for 10 seconds and smoke concentration ≥ 0.6 dB / m³ for 10 seconds; ⑤ Carbon monoxide concentration ≥ 800 ppm for 10 seconds and ambient temperature ≥ 60℃ for 10 seconds; ⑥ Ambient temperature ≥ 60℃ for 10 seconds and smoke concentration ≥ 0.6 dB / m³ for 10 seconds. It should be noted that any one of the above conditions must be met, and the duration of the condition must exceed the corresponding duration threshold to ensure the accuracy of the warning. Meeting any of the above conditions will trigger a secondary alarm.

[0075] In one embodiment, the target level alarm includes a level two alarm, and S206 above executes the packet-level fire linkage control corresponding to the target level alarm, including: S2064. Activate the alarm device and output a secondary alarm signal.

[0076] When the battery pack environmental data and cell performance data meet the conditions for a Level 2 alarm but not the conditions for a Level 3 alarm, a Level 2 alarm is triggered, and the corresponding pack-level fire alarm linkage control is executed, i.e., the alarm device is activated and a Level 2 alarm signal is output. The alarm device may include an audible and visual alarm, etc. The controller can passively read the Level 2 alarm signal from the data source (BMS) or monitoring platform via RS485 to complete the fire alarm notification.

[0077] In one embodiment, the three-level alarm conditions include: the battery cell temperature is greater than or equal to a first temperature threshold, the combustible gas concentration is greater than or equal to a second concentration threshold, and the smoke concentration is greater than or equal to a third concentration threshold, lasting for a first duration threshold; or, the battery cell temperature is greater than or equal to the first temperature threshold, the combustible gas concentration is greater than or equal to the second concentration threshold, and lasting for a first duration threshold, and the ambient temperature rise is greater than a preset temperature rise threshold, lasting for a third duration threshold, where the third duration threshold is less than the first duration threshold; or, the battery cell temperature is greater than or equal to the first temperature threshold, the smoke concentration is greater than or equal to the third concentration threshold, and lasting for a first duration threshold, and the ambient temperature is greater than a preset temperature rise threshold, lasting for a third duration threshold; or, the battery cell temperature is greater than or equal to the first temperature threshold, and the combustible gas concentration is greater than or equal to... The following conditions must be met: a second concentration threshold and a smoke concentration greater than or equal to a third concentration threshold for a first duration threshold, and an ambient temperature rise greater than or equal to a preset temperature rise threshold for a third duration threshold; or, an ambient temperature greater than or equal to a second temperature threshold and a smoke concentration greater than or equal to a third concentration threshold for a first duration threshold; or, a combustible gas concentration greater than or equal to a second concentration threshold and an ambient temperature greater than or equal to a third temperature threshold for a first duration threshold, where the third temperature threshold is greater than the second temperature threshold; or, a smoke concentration greater than or equal to a third concentration threshold and an ambient temperature rise greater than or equal to a preset temperature rise threshold for a third duration threshold; or, a combustible gas concentration greater than or equal to a second concentration threshold and an ambient temperature rise greater than or equal to a preset temperature rise threshold for a third duration threshold.

[0078] The above thresholds can be pre-configured in the controller, and the specific values ​​can be determined according to actual needs. For example, the third duration threshold is 3s, the second temperature threshold is 70℃, and the third temperature threshold is 85℃.

[0079] In this embodiment, the three-level alarm conditions include: ① Battery cell temperature ≥ 60℃ for 10 seconds, carbon monoxide concentration ≥ 800 ppm for 10 seconds, and smoke concentration ≥ 0.6 dB / m³ for 10 seconds; ② Battery cell temperature ≥ 60℃ for 10 seconds, carbon monoxide concentration ≥ 800 ppm for 10 seconds, and ambient temperature rise ≥ 30℃ / min for 3 seconds; ③ Battery cell temperature ≥ 60℃ for 10 seconds, smoke concentration ≥ 0.6 dB / m³ for 10 seconds, and ambient temperature rise ≥ 30℃ / min for 3 seconds; ④ Battery cell temperature ≥ 60℃ for 10 seconds, and carbon monoxide concentration ≥ 800 ppm for 10 seconds, and ambient temperature rise ≥ 30℃ / min for 3 seconds; The following conditions must be met for a Level 3 alarm to be triggered: ① Smoke concentration ≥ 0.6 dB / m³ for 10 seconds and ambient temperature rise ≥ 30℃ / min for 3 seconds; ② Ambient temperature ≥ 70℃ for 10 seconds and smoke concentration ≥ 0.6 dB / m³ for 10 seconds; ③ Ambient temperature ≥ 85℃ for 10 seconds and carbon monoxide concentration ≥ 800 ppm for 10 seconds; ④ Smoke concentration ≥ 0.6 dB / m³ for 10 seconds and ambient temperature rise ≥ 30℃ / min for 3 seconds; ⑤ Carbon monoxide concentration ≥ 800 ppm for 10 seconds and ambient temperature rise ≥ 30℃ / min for 3 seconds. It should be noted that any one of the above conditions must be met, and the duration of the judgment must exceed the corresponding duration threshold to ensure the accuracy of the warning.

[0080] It should be noted that in the Level 1, Level 2, and Level 3 alarm conditions of this disclosure, the values ​​of thresholds with the same names are identical. For example, in this disclosure, the values ​​of the first duration threshold, second duration threshold, third duration threshold, first temperature threshold, second temperature threshold, first concentration threshold, second concentration threshold, third concentration threshold, preset concentration threshold, and preset temperature rise threshold are the same in various embodiments.

[0081] Figure 5 This diagram illustrates a further embodiment of a battery pack fire control method provided in this disclosure. Figure 5 As shown, in one embodiment, the target level alarm includes three levels of alarms, and the corresponding package-level fire alarm linkage control is executed, including: S2066. Activate the alarm device and shut down the ventilation system; based on the alarm zone, control the opening of the solenoid valve of the battery rack where the thermal runaway battery pack is located; after a fourth time threshold delay, control the activation of the fire extinguishing device to spray perfluoroacetone onto the battery pack in the battery rack where the thermal runaway battery pack is located; control the opening of the venting indicator light and output a level three alarm signal.

[0082] The fourth time threshold is, for example, 30 seconds. That is, after a 30-second delay, the fire extinguishing device is activated, and perfluoroacetone is sprayed onto the battery rack where the thermal runaway battery pack is located, for a total of 3 sprays, in order to extinguish the fire in time.

[0083] In one embodiment, when the battery pack environmental data and cell performance data meet the Level 3 alarm conditions, the controller can generate a first control command, a second control command, and a third control command. The first control command activates the alarm device and shuts down the ventilation system; the second control command opens the battery column valve of the battery rack containing the thermal runaway battery pack; and the third control command activates the fire extinguishing device to spray perfluoroethyl ketone onto the battery rack and activates the venting indicator light. The controller transmits the Level 3 alarm signal to the BMS or monitoring platform via dry contact or RS485 passive reading to promptly notify relevant personnel.

[0084] It should be noted that, since the fire protection system of the battery pack is set in accordance with the standard, the settings of the first temperature threshold, the second temperature threshold, the first concentration threshold, the second concentration threshold, the third concentration threshold, the smoke concentration threshold, the first duration threshold, the second duration threshold, the third duration threshold, and the preset temperature rise threshold in this disclosure are all obtained with reference to the standards of the China Electricity Council and the range of the selected detector.

[0085] To deepen the understanding of the battery pack fire-fighting method according to the embodiments of this disclosure, the following is combined with... Figure 6 Please provide a detailed explanation.

[0086] like Figure 6 As shown, in one embodiment, the battery pack fire suppression method of this disclosure includes: S601. Acquire battery pack environmental data and cell performance data. The battery pack environmental data is collected by the environmental parameter acquisition unit and sent to the controller, while the cell performance data is collected by the performance parameter acquisition unit and sent to the controller through the battery management system.

[0087] S602. Determine whether the battery pack environmental data and / or cell performance data meet the first-level alarm conditions. If yes, execute S603; otherwise, return to S601. S603. Determine whether the battery pack environmental data and / or cell performance data meet the level 2 alarm conditions. If yes, execute S604; otherwise, execute S605. S604. Determine whether the battery pack environmental data and / or cell performance data meet the level 3 alarm conditions. If not, proceed to S606; if yes, proceed to S607. S605. Execute the package-level fire linkage control corresponding to the first-level alarm: increase the sampling frequency of the environmental parameter acquisition unit and the performance parameter acquisition unit, and output the first-level alarm signal; S606. Execute the fire alarm linkage control corresponding to the secondary alarm: activate the alarm device and output the secondary alarm signal; S607. Execute the package-level fire linkage control corresponding to the third-level alarm: activate the alarm device and close the ventilation system; control the opening of the column battery valve of the battery rack where the thermally out-of-control battery pack is located according to the alarm area; delay for the fourth time threshold value, and control the activation of the fire extinguishing device to spray perfluoroacetone on the battery packs of the battery rack where the thermally out-of-control battery pack is located; control the opening of the deflation indicator light and output the third-level alarm signal.

[0088] In this disclosure, the existing BMS cell-level temperature sensors and package-level composite fire detectors of the long-sized battery pack are reused. There is no need to deploy additional detectors, lay cables, or modify the structure of the battery pack. By optimizing and upgrading the alarm logic, hierarchical alarm and linkage control of the battery pack can be achieved, which can reduce the hardware investment by 15% - 20%, avoid the complex costs of subsequent disassembly and maintenance at the same time, and significantly reduce the full life cycle cost of the energy storage system.

[0089] Aiming at the pain point that there is a blind area in remote detection and alarm delay when using traditional package-level detectors for long-sized battery packs, by monitoring the cell temperature through the BMS, point-to-point monitoring can be achieved, directly capturing the cell temperature in the remote blind area, without relying on air or heat conduction of the cell to the composite fire detector, which can greatly shorten the alarm response time in the remote blind area, completely cover the window period from single-cell thermal runaway to adjacent cells, the entire battery pack, and even adjacent modules, avoid the spread of cell thermal runaway from the source. When the battery pack has an abnormality, the system can automatically trigger hierarchical alarm and execute linkage control, significantly improving the stability and reliability of the battery pack operation, saving the hardware modification cost, and achieving the dual optimization of technical performance and economy.

[0090] The solution of this disclosure does not need to change the physical structure of the long-sized battery pack, the BMS communication protocol, or the signal interface of the composite fire detector. It can be adapted to newly installed battery packs, and can also be applied to the existing long-sized battery pack system through software upgrade. And it is compatible with mainstream cell types such as lithium iron phosphate and ternary lithium, applicable to battery packs with different lengths such as 2 - 3m, without customized development, greatly improving the industry implementation adaptability of the solution.

[0091] Based on the same inventive concept, in the embodiments of this disclosure, a battery pack fire control device and a battery pack fire control system are also provided, as shown in the following embodiments. Since the principle of solving problems by the device and system embodiments is similar to that of the above method embodiments, the implementation of the device and system embodiments can refer to the implementation of the above method embodiments, and the repeated parts will not be described again.

[0092] Figure 7 The structural schematic diagram of a battery pack fire control device provided by the embodiments of this disclosure is shown. As Figure 7 shown, in one embodiment, the device includes: The first acquisition module 710 is used to acquire battery pack environmental data sent by the environmental parameter acquisition unit. The environmental parameter acquisition unit is set inside the battery pack, and the battery pack environmental data is the environmental data inside the battery pack at different times. The second acquisition module 720 is used to acquire cell performance data sent by the battery management system. The cell performance data is the performance data of a single cell in the battery pack collected at different times by the performance parameter acquisition unit. The performance parameter acquisition unit is communicatively connected to the battery management system. The linkage control module 730 is used to execute the pack-level fire linkage control corresponding to the target level alarm if the battery pack environmental data and / or the cell performance data meet the target level alarm conditions.

[0093] In one embodiment, the target alarm level conditions include a level 1 alarm condition, a level 2 alarm condition, and a level 3 alarm condition; the linkage control module 730 is configured to trigger a level 1 alarm if the battery pack environmental data and / or cell performance data meet the level 1 alarm condition but not the level 2 alarm condition; trigger a level 2 alarm if the battery pack environmental data and / or cell performance data meet the level 2 alarm condition but not the level 3 alarm condition; and trigger a level 3 alarm if the battery pack environmental data and / or cell performance data meet the level 3 alarm condition.

[0094] It should be noted that the battery pack environmental data includes at least one of the following: ambient temperature, smoke concentration, and combustible gas concentration within the battery pack; the cell performance data includes the cell temperature of the individual cells within the battery pack.

[0095] It should be noted that the first-level alarm conditions include: the cell temperature is greater than or equal to the first temperature threshold and lasts for a first duration threshold; or, the combustible gas concentration is greater than or equal to the first concentration threshold and lasts for a first duration threshold.

[0096] In one embodiment, the secondary alarm conditions include: the battery cell temperature is greater than or equal to a first temperature threshold and lasts for a second duration threshold, and the combustible gas concentration is greater than or equal to a second concentration threshold and lasts for a first duration threshold, wherein the second duration threshold is less than the first duration threshold; or, the battery cell temperature is greater than or equal to the first temperature threshold and the smoke concentration is greater than or equal to a third concentration threshold, lasting for a first duration threshold; or, the battery cell temperature is greater than or equal to the first temperature threshold and the ambient temperature is greater than or equal to the first temperature threshold, lasting for a first duration threshold; or, the combustible gas concentration is greater than or equal to the second concentration threshold and the smoke concentration is greater than or equal to the third concentration threshold, lasting for a first duration threshold; or, the ambient temperature is greater than or equal to the first temperature threshold and the combustible gas concentration is greater than or equal to the second concentration threshold, lasting for a first duration threshold; or, the ambient temperature is greater than or equal to the first temperature threshold and the smoke concentration is greater than or equal to the third concentration threshold, lasting for a first duration threshold.

[0097] In one embodiment, the three-level alarm conditions include: the battery cell temperature is greater than or equal to a first temperature threshold, the combustible gas concentration is greater than or equal to a second concentration threshold, and the smoke concentration is greater than or equal to a third concentration threshold, lasting for a first duration threshold; or, the battery cell temperature is greater than or equal to the first temperature threshold, the combustible gas concentration is greater than or equal to the second concentration threshold, and lasting for a first duration threshold, and the ambient temperature rise is greater than a preset temperature rise threshold, lasting for a third duration threshold, where the third duration threshold is less than the first duration threshold; or, the battery cell temperature is greater than or equal to the first temperature threshold, the smoke concentration is greater than or equal to the third concentration threshold, and lasting for a first duration threshold, and the ambient temperature is greater than a preset temperature rise threshold, lasting for a third duration threshold; or, the battery cell temperature is greater than or equal to the first temperature threshold, and the combustible gas concentration is greater than or equal to... The following conditions must be met: a second concentration threshold and a smoke concentration greater than or equal to a third concentration threshold for a first duration threshold, and an ambient temperature rise greater than or equal to a preset temperature rise threshold for a third duration threshold; or, an ambient temperature greater than or equal to a second temperature threshold and a smoke concentration greater than or equal to a third concentration threshold for a first duration threshold; or, a combustible gas concentration greater than or equal to a second concentration threshold and an ambient temperature greater than or equal to a third temperature threshold for a first duration threshold, where the third temperature threshold is greater than the second temperature threshold; or, a smoke concentration greater than or equal to a third concentration threshold and an ambient temperature rise greater than or equal to a preset temperature rise threshold for a third duration threshold; or, a combustible gas concentration greater than or equal to a second concentration threshold and an ambient temperature rise greater than or equal to a preset temperature rise threshold for a third duration threshold.

[0098] In one embodiment, the target level alarm includes a level one alarm. The linkage control module 730 is configured to increase the sampling frequency of the environmental parameter acquisition unit from the first sampling frequency to the second sampling frequency, increase the sampling frequency of the performance parameter acquisition unit from the third sampling frequency to the fourth sampling frequency, and output a level one alarm signal.

[0099] In one embodiment, the target level alarm includes a level two alarm, and the linkage control module 730 is configured to activate the alarm device and output a level two alarm signal.

[0100] In one embodiment, the target level alarm includes a three-level alarm. The linkage control module 730 is configured to activate the alarm device and shut down the ventilation system; according to the alarm area, control the opening of the column solenoid valve of the battery rack where the thermal runaway battery pack is located; delay for a fourth time threshold, control the activation of the fire extinguishing device to spray perfluoroacetone onto the battery pack in the battery rack where the thermal runaway battery pack is located; control the opening of the venting indicator light and output a three-level alarm signal.

[0101] Figure 8 This diagram illustrates the structure of a battery pack fire control system according to an embodiment of this disclosure. Figure 8 As shown, in one embodiment, the system includes: An environmental parameter acquisition unit 811 is installed inside the battery pack 810. The environmental parameter acquisition unit 811 is used to collect environmental data of the battery pack. The environmental data of the battery pack is the environmental data inside the battery pack 810 at different times. The performance parameter acquisition unit 813 is located inside the battery pack 810. The performance parameter acquisition unit 813 is used to acquire cell performance data, which is the performance data of individual cells in the battery pack 810 at different times. The battery management system 812 is communicatively connected to the performance parameter acquisition unit 813; The controller 820 is electrically connected to the environmental parameter acquisition unit 811 and the battery management system 812. The controller 820 is used to acquire battery pack environmental data sent by the environmental parameter acquisition unit and cell performance data sent by the battery management system. If the battery pack environmental data and / or cell performance data meet the target level alarm conditions, the controller will execute the pack-level fire linkage control corresponding to the target level alarm.

[0102] In this embodiment, the battery pack environmental data collected by the environmental parameter acquisition unit within the battery pack, combined with the cell performance data collected by the performance parameter acquisition unit, enables graded alarm and linkage control of the battery pack without altering the hardware structure. This effectively solves the alarm delay problem caused by blind spots in remote detection when using traditional pack-level detectors for long-size battery packs. When an abnormality occurs in the battery pack, the system can automatically trigger graded alarms and execute linkage control, significantly improving the stability and reliability of battery pack operation, saving hardware modification costs, and achieving dual optimization of technical performance and economy.

[0103] Those skilled in the art will understand that various aspects of this disclosure can be implemented as a system, method, or program product. Therefore, various aspects of this disclosure can be specifically implemented in the following forms: a completely hardware implementation, a completely software implementation (including firmware, microcode, etc.), or a combination of hardware and software aspects, collectively referred to herein as a "circuit," "module," or "system."

[0104] The following reference Figure 9 To describe an electronic device 900 according to such an embodiment of the present disclosure. Figure 9 The electronic device 900 shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments disclosed herein.

[0105] In one embodiment, the electronic device 900 includes a processor and a memory for storing executable instructions of the processor, wherein the processor is configured to perform the aforementioned battery pack fire control method by executing the executable instructions.

[0106] like Figure 9 As shown, the electronic device 900 is manifested in the form of a general-purpose computing device. The components of the electronic device 900 may include, but are not limited to: at least one processing unit 910, at least one storage unit 920, and a bus 930 connecting different system components (including storage unit 920 and processing unit 910).

[0107] The storage unit stores program code, which can be executed by the processing unit 910, causing the processing unit 910 to perform the steps described in the "Exemplary Methods" section of this specification according to various exemplary embodiments of this disclosure. For example, the processing unit 910 can perform the following steps of the above method embodiment: acquiring battery pack environmental data sent by an environmental parameter acquisition unit, wherein the environmental parameter acquisition unit is located inside the battery pack, and the battery pack environmental data is environmental data within the battery pack at different times; acquiring cell performance data sent by a battery management system, wherein the cell performance data is performance data of individual cells within the battery pack collected at different times by a performance parameter acquisition unit, and the performance parameter acquisition unit is communicatively connected to the battery management system; if the battery pack environmental data and / or cell performance data meet the target level alarm conditions, then executing the pack-level fire linkage control corresponding to the target level alarm.

[0108] Storage unit 920 may include readable media in the form of volatile storage units, such as random access memory (RAM) 9201 and / or cache memory 9202, and may further include read-only memory (ROM) 9203.

[0109] The storage unit 920 may also include a program / utility 9204 having a set (at least one) program module 9205, such program module 9205 including but not limited to: an operating system, one or more application programs, other program modules and program data, each or some combination of these examples may include an implementation of a network environment.

[0110] Bus 930 can represent one or more of several types of bus structures, including a memory cell bus or memory cell controller, a peripheral bus, a graphics acceleration port, a processing unit, or a local bus using any of the various bus structures.

[0111] Electronic device 900 can also communicate with one or more external devices 940 (e.g., keyboard, pointing device, Bluetooth device, etc.), and with one or more devices that enable a user to interact with the electronic device 900, and / or with any device that enables the electronic device 900 to communicate with one or more other computing devices (e.g., router, modem, etc.). This communication can be performed via input / output (I / O) interface 950. Furthermore, electronic device 900 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via network adapter 960. Figure 9 As shown, network adapter 960 communicates with other modules of electronic device 900 via bus 930. It should be understood that, although not shown in the figure, other hardware and / or software modules can be used in conjunction with electronic device 900, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0112] From the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solutions according to the embodiments of this disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, external hard drive, etc.) or on a network, including several instructions to cause a computing device (such as a personal computer, server, terminal device, or network device, etc.) to execute the methods according to the embodiments of this disclosure.

[0113] In particular, according to embodiments of the present disclosure, the processes described above with reference to the flowcharts can be implemented as a computer program product, which includes a computer program that, when executed by a processor, implements the steps described in the "Exemplary Methods" section above according to various exemplary implementations of the present disclosure.

[0114] In exemplary embodiments of this disclosure, a computer-readable storage medium is also provided, having a computer program stored thereon that, when executed by a processor, implements the steps described in the "Exemplary Methods" section above according to various exemplary embodiments of this disclosure. This computer-readable storage medium may be a readable signal medium or a readable storage medium.

[0115] In some possible implementations, various aspects of this disclosure can also be implemented as a program product comprising a computer program that, when executed by a processor, implements the battery pack fire control method of any of the above embodiments. In one possible embodiment, the program product includes program code that, when the program product is run on a terminal device, causes the terminal device to perform the steps of the various exemplary embodiments of this disclosure described in the "Exemplary Methods" section above.

[0116] More specific examples of computer-readable storage media in this disclosure may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0117] In this disclosure, a computer-readable storage medium may include a data signal propagated in baseband or as part of a carrier wave, carrying readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A readable signal medium may also be any readable medium other than a readable storage medium, capable of transmitting, propagating, or transmitting a program for use by or in connection with an instruction execution system, apparatus, or device.

[0118] Optionally, the program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to wireless, wired, optical fiber, RF, etc., or any suitable combination thereof.

[0119] In practice, program code for performing the operations of this disclosure can be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java and C++, and conventional procedural programming languages ​​such as C or similar languages. The program code can execute entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving remote computing devices, the remote computing device can be connected to the user's computing device via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computing device (e.g., via the Internet using an Internet service provider).

[0120] It should be noted that although several modules or units for the device used to perform actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to embodiments of this disclosure, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0121] Furthermore, although the steps of the method in this disclosure are described in a specific order in the accompanying drawings, this does not require or imply that the steps must be performed in that specific order, or that all the steps shown must be performed to achieve the desired result. Additional or alternative steps may be omitted, multiple steps may be combined into one step, and / or a step may be broken down into multiple steps.

[0122] From the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solutions according to the embodiments of this disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, external hard drive, etc.) or on a network, including several instructions to cause a computing device (such as a personal computer, server, mobile terminal, or network device, etc.) to execute the methods according to the embodiments of this disclosure.

[0123] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A battery pack fire control method, characterized in that, include: The battery pack environmental data is acquired from the environmental parameter acquisition unit, which is located inside the battery pack. The battery pack environmental data consists of environmental data from inside the battery pack at different times. The battery management system acquires cell performance data sent by the battery management system. The cell performance data is the performance data of a single cell in the battery pack collected at different times by a performance parameter acquisition unit, which is communicatively connected to the battery management system. If the battery pack environmental data and / or the cell performance data meet the target level alarm conditions, then the pack-level fire alarm linkage control corresponding to the target level alarm is executed.

2. The method according to claim 1, characterized in that, The target alarm level conditions include Level 1 alarm conditions, Level 2 alarm conditions, and Level 3 alarm conditions; Wherein, if the battery pack environmental data and / or the cell performance data meet the target level alarm conditions, then the pack-level fire alarm linkage control corresponding to the target level alarm is executed, including: If the battery pack environmental data and / or the cell performance data meet the first-level alarm conditions but do not meet the second-level alarm conditions, then a first-level alarm is triggered. If the battery pack environmental data and / or the cell performance data meet the level 2 alarm conditions but do not meet the level 3 alarm conditions, then a level 2 alarm is triggered. If the battery pack environmental data and / or the cell performance data meet the level 3 alarm conditions, then a level 3 alarm is triggered.

3. The method according to claim 2, characterized in that, The battery pack environmental data includes at least one of the following: ambient temperature, smoke concentration, and combustible gas concentration within the battery pack. The cell performance data includes the cell temperature of individual cells within the battery pack.

4. The method according to claim 3, characterized in that, The Level 1 alarm conditions include: The cell temperature is greater than or equal to a first temperature threshold and remains at a first duration threshold; or... The concentration of the combustible gas is greater than or equal to a first concentration threshold and remains at the first duration threshold.

5. The method according to claim 3, characterized in that, The secondary alarm conditions include: The cell temperature is greater than or equal to a first temperature threshold and remains at a second duration threshold, and the combustible gas concentration is greater than or equal to a second concentration threshold and remains at a first duration threshold, wherein the second duration threshold is less than the first duration threshold; or... The cell temperature is greater than or equal to the first temperature threshold and the smoke concentration is greater than or equal to the third concentration threshold, continuing for the first duration threshold; or... The cell temperature is greater than or equal to the first temperature threshold and the ambient temperature is greater than or equal to the first temperature threshold, for a duration of the first time threshold; or... The combustible gas concentration is greater than or equal to the second concentration threshold and the smoke concentration is greater than or equal to the third concentration threshold, continuing for the first duration threshold; or... The ambient temperature is greater than or equal to the first temperature threshold and the combustible gas concentration is greater than or equal to the second concentration threshold, and this condition persists for the first duration threshold; or... The ambient temperature is greater than or equal to the first temperature threshold and the smoke concentration is greater than or equal to the third concentration threshold, and the duration is the first time threshold.

6. The method according to claim 3, characterized in that, The three-level alarm conditions include: The cell temperature is greater than or equal to a first temperature threshold, the combustible gas concentration is greater than or equal to a second concentration threshold, and the smoke concentration is greater than or equal to a third concentration threshold, for a duration of a first duration threshold; or... The cell temperature is greater than or equal to the first temperature threshold, and the combustible gas concentration is greater than or equal to the second concentration threshold for a first duration threshold, and the ambient temperature rise is greater than a preset temperature rise threshold for a third duration threshold, wherein the third duration threshold is less than the first duration threshold; or... The cell temperature is greater than or equal to the first temperature threshold, the smoke concentration is greater than or equal to the third concentration threshold and remains at the first duration threshold, and the ambient temperature is greater than a preset temperature rise threshold and remains at the third duration threshold; or, The cell temperature is greater than or equal to the first temperature threshold, the combustible gas concentration is greater than or equal to the second concentration threshold, and the smoke concentration is greater than or equal to the third concentration threshold, and this condition persists for the first duration threshold; and the ambient temperature rise is greater than or equal to a preset temperature rise threshold, and this condition persists for the third duration threshold; or, The ambient temperature is greater than or equal to a second temperature threshold and the smoke concentration is greater than or equal to a third concentration threshold, continuing for the first duration threshold; or... The combustible gas concentration is greater than or equal to the second concentration threshold and the ambient temperature is greater than or equal to the third temperature threshold, and this condition persists for the first duration threshold, wherein the third temperature threshold is greater than the second temperature threshold; or... The smoke concentration is greater than or equal to the third concentration threshold, and the ambient temperature rise is greater than or equal to the preset temperature rise threshold, continuing for the third duration threshold; or, The combustible gas concentration is greater than or equal to the second concentration threshold, and the ambient temperature rise is greater than or equal to the preset temperature rise threshold, and this continues for the third duration threshold.

7. The method according to claim 2, characterized in that, The target level alarm includes the first-level alarm, and the execution of the package-level fire linkage control corresponding to the target level alarm includes: The sampling frequency of the environmental parameter acquisition unit is increased from the first sampling frequency to the second sampling frequency, and the sampling frequency of the performance parameter acquisition unit is increased from the third sampling frequency to the fourth sampling frequency, and a first-level alarm signal is output.

8. The method according to claim 2, characterized in that, The target level alarm includes the secondary alarm, and the execution of the packet-level fire linkage control corresponding to the target level alarm includes: The alarm device is activated, and a level two alarm signal is output.

9. The method according to claim 2, characterized in that, The target level alarm includes the third-level alarm, and the execution of the package-level fire linkage control corresponding to the target level alarm includes: Turn on the alarm and turn off the ventilation system; Based on the alarm zone, control the opening of the column solenoid valve of the battery rack where the thermal runaway battery pack is located; After a fourth time threshold is set, the fire extinguishing device is activated to spray perfluoroacetone onto the battery pack in the battery rack where the thermal runaway battery pack is located. Control the opening of the vent indicator light and output a three-level alarm signal.

10. A battery pack fire control device, characterized in that, include: The first acquisition module is used to acquire battery pack environmental data sent by the environmental parameter acquisition unit. The environmental parameter acquisition unit is set inside the battery pack, and the battery pack environmental data is the environmental data inside the battery pack at different times. The second acquisition module is used to acquire cell performance data sent by the battery management system. The cell performance data is the performance data of a single cell in the battery pack collected at different times by the performance parameter acquisition unit. The performance parameter acquisition unit is communicatively connected to the battery management system. The linkage control module is used to execute the pack-level fire linkage control corresponding to the target level alarm if the battery pack environmental data and / or the cell performance data meet the target level alarm conditions.

11. A battery pack fire control system, characterized in that, include: An environmental parameter acquisition unit is installed inside the battery pack. The environmental parameter acquisition unit is used to collect environmental data of the battery pack. The environmental data of the battery pack is the environmental data inside the battery pack at different times. A performance parameter acquisition unit is installed inside the battery pack. The performance parameter acquisition unit is used to acquire cell performance data. The cell performance data is the performance data of a single cell in the battery pack acquired by the performance parameter acquisition unit at different times. The battery management system is communicatively connected to the performance parameter acquisition unit. The controller is electrically connected to the environmental parameter acquisition unit and the battery management system. The controller is used to acquire the battery pack environmental data sent by the environmental parameter acquisition unit and the cell performance data sent by the battery management system. If the battery pack environmental data and / or the cell performance data meet the target level alarm conditions, the controller will execute the pack-level fire linkage control corresponding to the target level alarm.

12. An electronic device, characterized in that, It includes a processor and a memory, the memory storing a computer program that, when executed by the processor, implements the battery pack fire control method as described in any one of claims 1-9.

13. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the battery pack fire control method as described in any one of claims 1-9.

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