Battery system

Abstract

The utility model discloses a battery system, the battery system comprises a battery pack, a sensor module and an inflation device, and the sensor module is used for detecting whether the battery pack has an abnormal state; the gas charging device is connected with the battery pack and is used for conveying inert gas into the battery pack; when the sensor module detects that the battery pack is in an abnormal state, the gas charging device conveys inert gas into the battery pack. According to the invention, the abnormal state of the battery pack can be timely and accurately identified, the safety control processing can be rapidly carried out, and the safety and stability of the battery system can be effectively improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery system. Background Technology

[0002] With the rapid development of electric vehicles and energy storage systems, lithium iron phosphate batteries are widely used due to their high energy density, long lifespan, and good safety performance. However, lithium batteries may experience thermal runaway under abnormal conditions such as overheating, overcharging, or internal short circuits. This can lead to a rapid increase in battery temperature, the release of large amounts of gas, and even fires or explosions, seriously threatening personnel safety and equipment operation. Traditional battery management systems struggle to identify and respond to thermal runaway events in a timely and accurate manner, resulting in delayed and inadequate safety control measures that fail to effectively control the spread of thermal runaway, posing significant safety risks.

[0003] To solve the above problems, a battery system with high safety and stability is needed. Utility Model Content

[0004] This application provides a battery system that can promptly and accurately identify abnormal states of the battery pack and quickly perform safety control procedures, effectively improving the safety and stability of the battery system.

[0005] On one hand, embodiments of this application provide a battery system, including:

[0006] Battery pack;

[0007] The sensor module is used to detect whether the battery pack is in an abnormal state;

[0008] An inflation device, connected to the battery pack, is used to supply inert gas into the battery pack;

[0009] When the sensor module detects that the battery pack is in an abnormal state, the inflation device delivers inert gas into the battery pack.

[0010] This application provides a battery system including a battery pack, a sensor module, and a gas filling device. The sensor module detects abnormal states in the battery pack. The gas filling device is connected to the battery pack and supplies inert gas into it. When the sensor module detects an abnormal state, the gas filling device supplies inert gas to the battery pack. Through real-time monitoring by the sensor module, this application allows the battery system to promptly and accurately identify abnormal states in the battery pack, such as abnormal voltage, elevated temperature, or excessive flammable gas concentration. This helps to take preventative measures before thermal runaway or other dangerous situations occur, significantly improving the safety of the battery system. When the sensor module detects an abnormal state, the gas filling device rapidly supplies inert gas to the battery pack for quick safety control. This rapid response mechanism effectively prevents the spread of thermal runaway within the battery pack, reducing potential damage. This battery system design, by intervening early and controlling abnormal states in the battery pack, reduces the risk of system failure due to battery pack abnormalities, enhancing the stability and reliability of the entire battery system. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the battery system provided in an embodiment of this application.

[0012] Figure 2 This is another schematic diagram of the battery system provided in an embodiment of this application. Detailed Implementation

[0013] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0014] The following sections provide detailed descriptions of each example. It should be noted that the order in which the embodiments are described is not intended to limit the priority of the embodiments.

[0015] This application provides a battery system 100. Please refer to... Figure 1 and Figure 2 , Figure 1 and Figure 2 This is a schematic diagram of the structure of a battery system provided in an embodiment of this application. The battery system 100 may include a battery pack 10, a sensor module 20, and an inflation device 30.

[0016] The battery pack 10, serving as the energy storage unit of the entire battery system 100, can be composed of multiple lithium iron phosphate battery cells or cell groups. Each cell or cell group can be connected together in a specific manner (such as in series or in parallel) to provide the required voltage and capacity.

[0017] The sensor module 20 is used to detect whether the battery pack 10 is in an abnormal state. The sensor module 20 is a highly integrated detection unit used to monitor various status parameters of the battery pack 10 in real time. These status parameters include, but are not limited to, the battery pack's temperature, voltage, current, internal resistance, and the concentration of smoke or gases inside the battery pack (such as hydrogen, carbon monoxide, and other combustible gases). The sensor module 20 acquires data through high-precision sensors to ensure accurate reflection of the actual state of the battery pack. Once the sensor detects any abnormal parameters (such as voltage fluctuations exceeding the normal range, a sharp rise in temperature, or an excessive concentration of combustible gases), the sensor module will immediately trigger an alarm and notify other components of the system to take appropriate measures.

[0018] The inflation device 30 is connected to the battery pack 10 and is used to supply inert gas into the battery pack 10. When the sensor module 20 detects that the battery pack 10 is in an abnormal state, the inflation device 30 supplies inert gas into the battery pack 10.

[0019] For example, the gas filling device 30 is a specially designed gas delivery structure used to supply inert gas into the battery pack 10 when it is in an abnormal state. Inert gases (such as nitrogen, argon, etc.) are non-flammable and non-explosive, effectively isolating oxygen in the air and thus preventing further escalation of the chemical reaction inside the battery pack 10. The injection of inert gas can effectively dilute the concentration of flammable gases inside the battery pack 10, reduce the risk of explosion, and suppress the spread of fire by reducing the oxygen content.

[0020] In some embodiments, the battery system 100 further includes an exhaust port 40 configured to discharge the mixed gas located inside the battery pack 10 when the battery pack 10 reaches a preset temperature.

[0021] For example, the main function of the vent 40 is to safely discharge the mixed gas (including inert gas, residual combustible gas, etc.) inside the battery pack 10 after the battery pack 10 has been injected with inert gas by the inflation device 30 for safety control, and after the battery pack temperature reaches (e.g., drops to) a preset temperature range. By discharging these mixed gases, the pressure inside the battery pack 10 can be further reduced, the safety risks that may be caused by internal high pressure can be reduced, and the battery pack 10 can be restored to normal working condition as soon as possible.

[0022] For example, the vent 40 is usually carefully positioned in the appropriate location of the battery pack to ensure that gas can be discharged smoothly without affecting the structural integrity and electrical performance of the battery pack.

[0023] For example, the vent 40 is located at the top of the battery pack 10. For a battery pack 10 designed to be placed vertically, the top position facilitates the natural rise and smooth discharge of gas, reducing the accumulation inside the battery pack 10.

[0024] For example, the exhaust port 40 is located on the side of the battery pack. For a horizontally or tilted battery pack 10, the exhaust port 40 can be located on the side. This ensures that gas can flow along the long axis of the battery pack 10 and be smoothly discharged through the exhaust port 40. The design of the side exhaust port 40 also needs to consider the gas flow path to avoid the formation of vortices or dead zones inside the battery pack 10.

[0025] For example, the vent 40 is located at the bottom of the battery pack 10. If the battery pack 10 needs to be inverted or placed at a specific angle, the vent 40 is located at the bottom of the battery pack 10 to ensure that gas can be discharged smoothly. Special care must be taken in the design of the bottom vent 40 to prevent moisture or impurities from entering the battery pack 10.

[0026] For example, the vent 40 can be integrated into the cover or sealing surface of the battery pack 10. This design facilitates maintenance and replacement while maintaining the integrity and sealing of the battery pack 10.

[0027] For example, the vent 40 is located on the side of the battery pack 10 away from the side directly exposed to the external environment. To prevent moisture, dust, or other contaminants from the external environment from entering the battery pack 10 through the vent 40, the vent 40 is typically located on the side away from the side directly exposed to the external environment. This reduces the risk of contaminants entering and keeps the inside of the battery pack 10 clean and dry.

[0028] For example, the vent 40 may be equipped with an automatic control valve that can automatically open or close according to the temperature and pressure conditions inside the battery pack to ensure that the timing and rate of venting are optimal.

[0029] For example, when sensor module 20 detects an abnormal state in battery pack 10 and triggers inflation device 30 for safety control, the system continuously monitors the temperature of battery pack 10. Once the battery pack temperature drops to a preset temperature range (this preset temperature range is typically determined based on the battery type, specifications, and safety standards), battery system 100 will automatically or manually open the valve of vent 40, allowing the mixed gas inside battery pack 10 to be safely released. After the venting process is complete, battery system 100 can perform a comprehensive check again to ensure that battery pack 10 has returned to a safe state before it can be put back into use.

[0030] By introducing the vent 40, the battery system 100 can take more comprehensive and effective measures when dealing with abnormal states of the battery pack 10, further improving the safety and stability of the system.

[0031] In some embodiments, the sensor module 20 includes:

[0032] Voltage sensor 21 is used to detect voltage data U of battery system 100. t ;

[0033] Temperature sensor 22 is used to detect temperature data inside the battery pack 10, including the temperature value T of each cell inside the battery pack 10. j The temperature rise value T of each cell within the battery pack 10 within a preset time period. sj ;

[0034] Gas detector 23 is used to detect the concentration C of combustible gas inside battery pack 10. t ;

[0035] Among them, the sensor module 20 is based on the voltage data U t Temperature data and combustible gas concentration C t To determine if there is an abnormal state in battery pack 10.

[0036] For example, the voltage sensor 21 is used to monitor the voltage data U of the battery system 100 in real time. t This includes the total voltage and the voltage of each individual cell. By comparing it with a preset voltage threshold, the voltage sensor 21 can determine whether there are abnormal voltage conditions such as overcharging, over-discharging, or voltage imbalance.

[0037] For example, the temperature sensor 22 can detect not only the temperature value T of each cell in the battery pack 10. j It can also record the temperature rise value T of each cell within a preset time period. sj By monitoring this data, the temperature sensor 22 can promptly detect overheating within the battery pack 10, as well as potential temperature differences between the cells, thereby determining whether there is a temperature anomaly.

[0038] For example, the gas detector 23 is used to detect the concentration C of combustible gas within the battery pack 10. t Other gas concentrations, such as those for detecting hydrogen, carbon monoxide, carbon dioxide, methane, ethylene, ethane, and smoke within the battery pack 10. When a chemical reaction or leak occurs inside the battery system 100, the concentration of combustible gases may increase, thereby increasing the risk of fire or explosion. Gas detector 23 can monitor the concentration of these gases in real time and compare it with preset combustible gas concentration thresholds to determine if there are any abnormalities in combustible gas concentrations.

[0039] In some embodiments, the sensor module 20 is further configured to:

[0040] When voltage data U t Exceeding the preset voltage threshold U MAX When this occurs, it is determined to be a voltage anomaly;

[0041] When the temperature value T of any cell in the battery pack 10 j Exceeding the preset temperature alarm value, or the temperature rise value T of any cell. sj If the temperature rise exceeds the preset alarm value, it is determined to be an abnormal temperature.

[0042] When the concentration of combustible gas C t Exceeding the preset combustible gas concentration threshold C MAX When this occurs, it is determined to be an abnormal concentration of combustible gas;

[0043] If any of the following conditions are present: abnormal voltage, abnormal temperature, or abnormal combustible gas concentration, the battery pack 10 is determined to be in an abnormal state.

[0044] In some embodiments, a preset voltage threshold U MAX It is determined by the product of the nominal voltage of a single battery cell (e.g., 3.6V) and the number of cells connected in series, n. For example, U MAX =3.6*n.

[0045] In some embodiments, the preset temperature alarm value includes a first preset temperature alarm value and a second preset temperature alarm value, wherein the first preset temperature alarm value is the average temperature data T. p The first preset temperature value is T y1 The sum of these values, and the second preset temperature alarm value is the average temperature data T. p The second preset temperature value is T y2 The sum of these, the second preset temperature value T y2 It is less than the first preset temperature value T y1 ;

[0046] The preset temperature rise alarm values ​​include the first preset temperature rise alarm value T. sy1 Compared with the second preset temperature rise alarm value T sy2 The second preset temperature rise alarm value T sy2 The temperature rise is less than the first preset alarm value;

[0047] The sensor module is further configured as follows:

[0048] When voltage data U t The preset voltage threshold U was not exceeded. MAX And within a preset time period, the temperature value T of any cell in the battery pack j Exceeding the first preset temperature alarm value, or the temperature rise value T of any cell.sj Exceeding the first preset temperature rise alarm value T sy1 When this occurs, it is determined to be an abnormal temperature; or

[0049] When voltage data U t Exceeding the preset voltage threshold U MAX And within a preset time period, the temperature value T of any cell in the battery pack j Exceeding the second preset temperature alarm value, or the temperature rise value T of any cell. sj Exceeding the second preset temperature rise alarm value T sy2 At that time, it was determined to be an abnormal temperature.

[0050] Where 1≤j≤m, and m is the number of temperature sensors.

[0051] For example, T y1 =8℃, T y2 =6℃, T sy1 =15℃, T sy2 =10℃.

[0052] For example, C MAX =60%.

[0053] In some embodiments, the battery system 100 further includes a multi-level alarm module for initiating corresponding levels of alarm and safety control processing based on abnormal conditions:

[0054] The first-level alarm is a voltage abnormality alarm. When the abnormality is voltage abnormality, an audible and visual signal is issued to indicate the abnormal battery pack 10 or the abnormal cell.

[0055] The second-level alarm is a temperature abnormality alarm. When the abnormality is a temperature abnormality, the input switch and output switch of battery pack 10 are disconnected.

[0056] The third-level alarm is an alarm for abnormal combustible gas concentration. When the abnormal state is that the combustible gas concentration is abnormal, the charging device 30 is activated to deliver inert gas into the battery pack 10.

[0057] For example, a Level 1 alarm (voltage anomaly alarm): When the abnormal condition is a voltage anomaly, an audible and visual alarm is issued to indicate the abnormal battery pack 10 or the abnormal cell. This level of alarm is designed to remind operators to immediately check and address the voltage anomaly to prevent further deterioration.

[0058] For example, a level 2 alarm (temperature anomaly alarm): when the abnormal state is temperature anomaly, the input and output switches of battery pack 10 are disconnected. Simultaneously, the efficiency of the cooling module is improved to quickly reduce the temperature and prevent thermal runaway caused by excessive temperature.

[0059] For example, a level three alarm (abnormal combustible gas concentration alarm): when the abnormal state is an abnormal combustible gas concentration, the gas filling device 30 is activated to supply inert gas (such as nitrogen) into the battery pack 10. The gas filling device 30 effectively reduces the risk of explosion by diluting the oxygen content and combustible gas concentration in the internal air.

[0060] Through the precise monitoring of the sensor module 20 and the rapid response of the multi-level alarm module, the battery system 100 can quickly take measures when abnormal conditions occur, ensuring the safety and reliability of the system. At the same time, these functions also provide strong support for the long-term stable operation of the battery system.

[0061] In some embodiments, the sensor module 20 is further configured to dynamically adjust a preset voltage threshold, a preset temperature alarm value, a preset temperature rise alarm value, and a combustible gas concentration threshold according to the usage status of the battery system 100.

[0062] The usage status of the battery system 100 includes, but is not limited to, the charging and discharging phase, ambient temperature, ambient humidity, and load conditions.

[0063] Charge and discharge phases: The internal state of the battery system 100 changes significantly during different phases of charging and discharging. For example, during fast charging, the battery system 100 may experience a higher current density, leading to a faster temperature rise. Therefore, during the charging phase, the monitoring thresholds for temperature and voltage can be appropriately tightened to detect abnormalities earlier; while during the discharging phase, the thresholds can be appropriately relaxed according to the actual load conditions.

[0064] Ambient temperature: Changes in external ambient temperature directly affect the performance and safety of the battery system 100. For example, in high-temperature environments, the battery system 100 is more prone to thermal runaway, so it is necessary to lower the temperature alarm threshold to provide early warning of potential problems; in low-temperature environments, the chemical reaction rate within the battery system 100 slows down, which may allow for a higher temperature threshold setting.

[0065] Ambient humidity: High humidity environments may increase the risk of battery short circuits or other electrical failures. In this case, sensor module 20 can tighten the voltage and temperature threshold settings to ensure that potential problems can be detected and addressed promptly, even in humid environments.

[0066] Load conditions: The heat generation and voltage fluctuations of the battery system 100 will vary under different load conditions. Under heavy loads, the battery temperature rises faster, and voltage fluctuations may be more severe. Therefore, under heavy loads, temperature and voltage should be monitored more strictly to prevent overheating or overvoltage; while under light loads, the thresholds can be appropriately relaxed according to the actual situation.

[0067] Through this dynamic adjustment mechanism, the sensor module 20 can automatically optimize monitoring parameters according to the real-time usage status, thereby improving the system's adaptability and response speed.

[0068] For example, the sensor module 20 has a built-in intelligent algorithm that can automatically calculate and adjust various thresholds based on real-time monitored usage data (such as charging and discharging current, ambient temperature, humidity, etc.).

[0069] For example, historical data can be analyzed to establish optimal parameter models for safe operation under different usage conditions, ensuring that each adjustment is based on sufficient data support.

[0070] For example, a user interface can be provided that allows operators to manually adjust certain key parameters according to specific application scenarios to meet special needs.

[0071] For example, when the battery is charging and the ambient temperature is high, the sensor module 20 will automatically lower the temperature alarm threshold and strengthen the monitoring of the temperature rise rate to prevent thermal runaway caused by the accumulation of heat generated during charging.

[0072] For example, during high-current discharge, sensor module 20 may appropriately relax the voltage threshold, but at the same time strengthen the monitoring of temperature and combustible gas concentration to ensure that abnormal signals can be captured in a timely manner even under high load conditions.

[0073] For example, when the battery system 100 is in an extremely cold or hot environment, the sensor module 20 will adjust all monitoring parameters accordingly based on the environmental conditions to ensure that the system can still operate stably under extreme conditions.

[0074] The dynamic threshold adjustment function of sensor module 20 enables battery system 100 to maintain optimal safety performance under different usage conditions, maximizing user benefits and system stability. This intelligent design not only enhances system adaptability but also effectively extends battery life and reduces unnecessary alarms and interventions.

[0075] In some embodiments, the battery system 100 further includes a display module 50 for displaying voltage data, temperature data, combustible gas concentration, and safety control processing results in real time through a user interface.

[0076] For example, the battery system 100 also includes a display module 50 for displaying the following key data and information in real time through a user interface:

[0077] Voltage data: Displays the current voltage level of the battery system 100, helping operators monitor the battery's operating status and ensure it operates within a safe range.

[0078] Temperature data: Displays the temperature value and temperature rise value of each cell in the battery pack 10, providing detailed temperature distribution information to facilitate timely detection of potential overheating risks.

[0079] Combustible gas concentration: Displays the concentration of combustible gases such as hydrogen, carbon monoxide, carbon dioxide, methane, ethylene, and ethane within the battery pack 10, ensuring that operators can quickly identify gas leaks or abnormal accumulations.

[0080] Safety control processing results: Real-time feedback on the safety measures taken by the system (such as the release of inert gas by the inflation device 30, the activation of the cooling module, etc.) allows users to understand the system's response status and enhances their trust in and sense of control over the system.

[0081] For example, the display module 50 can use an intuitive graphical interface to display data such as voltage, temperature, and gas concentration through charts, dashboards, etc., so that users can understand the operating status of the battery system at a glance.

[0082] For example, the display module 50 can provide a historical data query function, allowing users to view voltage change trends, temperature fluctuation curves, and safety event records over a period of time, which helps in fault analysis and preventive maintenance.

[0083] For example, when an abnormality is detected, the display module 50 will immediately notify the user through sound and light alarms, pop-up prompts, etc., and clearly indicate the specific type of abnormality (such as abnormal voltage, abnormal temperature or abnormal combustible gas concentration) and the location of the affected cell or battery pack.

[0084] Remote access and control: Supports remote access and control via network connection. Users can monitor the status of the battery system at any time through mobile devices or computer terminals, receive alarm information, and perform remote operations when necessary.

[0085] Multilingual support: Considering the needs of users in different regions, the display module 50 supports multiple language switching to ensure that all users can easily understand and operate it.

[0086] Custom settings: Allows users to adjust parameters such as interface layout, data refresh rate, and alarm threshold according to actual application scenarios to meet personalized needs.

[0087] In some embodiments, the inflation device 30 includes a nitrogen tank 31, which is connected to the inside of the battery pack 10 via a pipe. When the sensor module 20 detects that the battery pack 10 is in an abnormal state, the nitrogen tank 31 releases nitrogen into the battery pack 10 to reduce the concentration of combustible gas in the battery pack 10.

[0088] For example, nitrogen cylinder 31, as a container for storing nitrogen, has high-pressure storage capacity, ensuring the rapid release of large quantities of nitrogen when needed. Nitrogen is an inert gas that does not chemically react with most substances, and is therefore widely used in fire extinguishing and gas dilution applications.

[0089] The nitrogen tank 31 is connected to the inside of the battery pack 10 via specially designed pipes. These pipes not only ensure the smooth flow of nitrogen, but also maintain a stable connection under high pressure to prevent nitrogen leakage.

[0090] When the sensor module 20 detects an abnormal state in the battery pack 10 (such as excessive temperature or excessive flammable gas concentration), it immediately triggers a safety control response mechanism. At this time, the nitrogen tank 31 receives a signal from the sensor module 20 and releases nitrogen into the battery pack 10 through a pipeline. The released nitrogen quickly fills the interior of the battery pack 10, diluting the flammable gas within and thus reducing the risk of explosion and fire. Simultaneously, the release of nitrogen also reduces the oxygen concentration within the battery pack 10, further inhibiting the combustion reaction.

[0091] Because the nitrogen tank 31 is directly connected to the battery pack 10, it can respond to abnormal situations and release nitrogen in a very short time. This rapid response mechanism is crucial for preventing emergencies such as battery thermal runaway.

[0092] For example, to improve system reliability, the inflation device 30 may include multiple nitrogen tanks 31 and piping systems to ensure that a backup system can still operate in the event of a failure of the main system.

[0093] In some embodiments, the inflation device 30 further includes an intelligent control unit 32 for automatically adjusting the nitrogen release amount of the nitrogen tank 31 according to the change in the concentration of combustible gas in the battery pack 10.

[0094] For example, the intelligent control unit 32 can acquire real-time data on the concentration of combustible gas in the battery pack by connecting to the sensor module 20.

[0095] Data Analysis: The intelligent control unit 32 may include a microprocessor for executing built-in control algorithms, quickly analyzing real-time data provided by the sensor module 20 to determine whether the current concentration of combustible gas exceeds the safety threshold, and calculating the optimal nitrogen release amount.

[0096] Based on the analysis results, the intelligent control unit 32 automatically adjusts the release valve of the nitrogen tank 31 to control the amount of nitrogen released. When the concentration of combustible gas increases, the nitrogen release is increased to quickly dilute the gas; when the concentration decreases to a safe range, the nitrogen release is reduced or stopped to avoid unnecessary waste.

[0097] For example, if the concentration of combustible gas continues to rise or reaches a preset alarm threshold, the intelligent control unit 32 will immediately trigger higher-level safety protection measures, such as increasing nitrogen release or activating the emergency ventilation system.

[0098] For example, in extreme cases, such as when a cell in the battery pack 10 experiences thermal runaway, causing a rapid increase in temperature and the generation of a large amount of flammable gas, the sensor module 20 will quickly detect the abnormality and trigger the intelligent control unit 32. At this time, the intelligent control unit 32 will immediately activate the nitrogen tank 31 to release nitrogen into the battery pack 10, rapidly reducing the concentration of flammable gas and preventing an explosion.

[0099] For example, during normal operation, the intelligent control unit 32 can periodically replenish small amounts of nitrogen to maintain an inert gas environment within the battery pack 10, further enhancing system safety. Furthermore, the intelligent control unit 32 can optimize nitrogen usage strategies based on historical data analysis, extending the lifespan of the nitrogen tank 31.

[0100] For example, in the event of a fire or other emergency, the intelligent control unit 32 can work in conjunction with other fire-fighting equipment to quickly isolate the fire source and suppress the spread of flames. For instance, in electric vehicles or energy storage facilities, the intelligent control unit 32 can release a large amount of nitrogen into the battery pack 10 immediately to prevent the fire from spreading and buy valuable time for rescue.

[0101] For example, in addition to automatically adjusting the amount of nitrogen released, the intelligent control unit 32 can also display the combustible gas concentration data and nitrogen release status inside the battery pack 10 to the user through the user interaction interface provided by the display module 50.

[0102] For example, the intelligent control unit 32 can also receive user-set safety thresholds and control parameters through the user interface provided by the display module 50, so as to adapt to different operating conditions and safety requirements.

[0103] In some embodiments, the inflation device 30 further includes a spray cooling unit 33, which sprays refrigerant onto the outside of the battery pack 10 when the nitrogen tank 31 releases nitrogen into the battery pack 10, in order to help reduce the temperature of the battery pack 10.

[0104] For example, when the nitrogen tank 31 begins to release nitrogen into the battery pack 10, this action triggers the activation of the spray cooling unit 33. This can be achieved through electrical connection, mechanical linkage, or signal transmission.

[0105] For example, the spray cooling unit 33 uses specific refrigerants that typically possess good thermal conductivity and evaporation characteristics, enabling them to rapidly absorb and remove heat. The refrigerant is sprayed in a mist form onto the outer surface of the battery pack 10 through the nozzles of the spray cooling unit 33. This mist-like refrigerant increases the contact area with the battery pack surface, thereby improving heat exchange efficiency. The refrigerant sprayed onto the outside of the battery pack 10 evaporates rapidly, absorbing heat from the surface of the battery pack 10. This evaporation process is a highly efficient heat exchange process that can significantly reduce the temperature of the battery pack.

[0106] For example, the evaporated refrigerant can be collected and recycled by the battery system 100, or treated through a suitable discharge system.

[0107] For example, the operating status of the spray cooling unit 33 can also be coordinated with the intelligent control unit 32. The intelligent control unit 32 can dynamically adjust the spray intensity and frequency of the spray cooling unit 33 according to the temperature changes of the battery pack and the amount of nitrogen released.

[0108] This coordinated regulation ensures that the battery pack maintains a suitable temperature range during nitrogen release, while avoiding overcooling or wasting resources.

[0109] In some embodiments, the battery system 100 further includes an energy recovery module 60 for recovering and storing released energy during abnormal handling of the battery pack 10.

[0110] For example, during thermal runaway handling, excess heat is converted into electrical or thermal energy by the energy conversion device in the energy recovery module 60 and stored in an energy storage device for later reuse.

[0111] For example, in an emergency such as thermal runaway, the energy recovery module 60 can quickly recover the released energy, reduce energy waste, and provide additional power support to enhance the system's sustainability.

[0112] In some embodiments, the battery system 100 further includes a remote communication module 70, which is used to remotely transmit the status information of the battery system 100 (including abnormal status, alarm information, safety control processing results, etc.) to a monitoring center or user terminal to realize remote monitoring and management.

[0113] For example, status information includes abnormal status, alarm information, and security control processing results.

[0114] For example, the remote communication module 70 is used to remotely transmit the status information of the battery system 100 to a monitoring center or user terminal to achieve remote monitoring and management. Operators can view the operating status of the battery system at any time through mobile devices or computer terminals, receive alarm information, and perform remote operations when necessary to ensure timely response and handling of abnormal situations. This is particularly suitable for scenarios such as distributed energy storage facilities and electric vehicle fleet management.

[0115] In some embodiments, the sensor module 20 further includes a humidity sensor 24 for detecting humidity data within the battery pack 10 as another reference indicator for determining whether the battery pack 10 is abnormal.

[0116] For example, humidity is a crucial factor affecting battery performance and lifespan. Adding a humidity sensor 24 within the battery pack 10 allows for real-time monitoring of internal humidity data. Excessive humidity can lead to chemical reactions within the battery, impacting performance and potentially causing safety issues. Therefore, the data provided by the humidity sensor 24 serves as another important reference indicator for determining whether the battery pack 10 is malfunctioning. In humid environments, the humidity sensor 24 can help provide early warnings of potential problems. By combining this data with other parameters such as temperature, voltage, and gas concentration, the system can more accurately assess the state of the battery pack 10 and take preventative measures. For instance, by comparing the humidity with a preset threshold, the system can promptly take appropriate actions, such as activating a dehumidifier or issuing an alarm signal, to ensure the safe operation of the battery pack.

[0117] In some embodiments, the battery system 100 further includes a pressure detection module 80 configured to monitor the internal pressure value of the battery pack 10, and release pressure through the vent 40 when the internal pressure value exceeds a preset pressure threshold, so as to reduce the internal pressure value of the battery pack 10 and prevent explosion.

[0118] For example, under abnormal conditions, the battery pack 10 may generate a large amount of gas, causing a sharp increase in internal pressure. To prevent the battery pack 10 from exploding due to excessive pressure, a pressure detection module 80 and a vent 40 are incorporated into the battery system 100. The pressure detection module 80 can monitor the internal pressure value of the battery pack in real time and compare it with a preset pressure threshold. Once the internal pressure exceeds the threshold, the system triggers the opening mechanism of the vent 40 to release the internal pressure. This design not only improves the safety of the battery system 100 but also effectively prevents battery damage or fire accidents caused by excessive pressure.

[0119] In some embodiments, the pipeline between the nitrogen tank 31 and the battery pack 10 is provided with a one-way valve to prevent gas in the battery pack 10 from flowing back into the nitrogen tank 31.

[0120] For example, installing a one-way valve on the pipeline between the nitrogen tank 31 and the battery pack 10 is one of the important measures to ensure the normal operation of the nitrogen supply function. The one-way valve can prevent gas in the battery pack 10 from flowing back into the nitrogen tank 30, thereby avoiding nitrogen contamination or affecting system performance. This design not only improves the reliability and stability of the nitrogen supply, but also extends the service life of the nitrogen tank 31 and the entire battery system 100.

[0121] In some embodiments, the battery system 100 further includes a data logging module 90 for storing historical data and abnormal event records detected by the sensor module 20 for subsequent analysis and maintenance.

[0122] For example, the data logging module 90 is a crucial component of the battery system 100 for storing historical data and recording abnormal events. It records various data detected by the sensor module 20 (such as temperature, humidity, and pressure) as well as abnormal events occurring in the system (such as alarm signals and safety control actions). This data is essential for subsequent system analysis, maintenance, and improvement. Through the data logging module 90, operators can easily access historical data, analyze trends in system operating status, and promptly identify and resolve potential problems. Furthermore, this data serves as a vital basis for system performance evaluation and optimization.

[0123] For example, the specific workflow of battery system 100 is as follows:

[0124] S110, the voltage data U of the battery system 100 is detected by the voltage sensor 21. t When the voltage data U t Exceeding the preset voltage threshold U MAX When the voltage is abnormal, it is determined that there is a problem with the battery cell in the battery system 100, and step S120 is further executed; or, when the voltage data U t The preset voltage threshold U was not exceeded. MAX If it is initially determined that there is no problem with the cells in the battery system 100, then step S120 is executed.

[0125] S111, during normal operation of the battery system 100, the voltage data U of the battery system 100 is monitored and collected in real time. t ;

[0126] S112, Set the preset voltage threshold U MAX Determine the voltage data U monitored in real time in S1.1 t Does it exceed the preset voltage threshold U? MAX Among them, the preset voltage threshold U MAX It is determined by the product of the nominal voltage of a single battery cell (e.g., 3.6V) and the number of cells connected in series, n. For example, UMAX =3.6*n;

[0127] S113, if the battery system voltage data U t Exceeding the preset voltage threshold U MAX If the abnormal state is determined to be a voltage abnormality, a level one alarm (voltage abnormality alarm) will be activated, and the location will be pinpointed to a single battery pack.

[0128] S120, temperature data inside the battery pack 10 is detected by temperature sensor 22, including the temperature value T of each cell inside the battery pack 10. j The temperature rise value T of each cell within the battery pack 10 within a preset time period. sj The results from step S110 are used to determine whether thermal runaway exists within the battery pack. When the temperature value T of any cell within the battery pack 10... j Exceeding the preset temperature alarm value, or the temperature rise value T of any cell. sj If the temperature rise exceeds the preset alarm value, it is determined to be an abnormal temperature, and step S130 is further executed; or, when the temperature value T of any cell in the battery pack 10 exceeds the preset alarm value, it is determined to be an abnormal temperature, and step S130 is further executed. j The temperature rise T of any cell is less than the preset alarm value. sj If the temperature rise is less than the preset alarm value, proceed to step S130.

[0129] For example, a corresponding temperature sensor 22 is provided in each battery pack 10, and the temperature value T of each cell in the battery pack 10 is collected by the temperature sensor 22. j The temperature rise value T of each cell within the battery pack 10 within a preset time period. sj .

[0130] Where 1≤j≤m, and m is the number of temperature sensors;

[0131] T j T represents the temperature value of each cell within the battery pack 10 collected by temperature sensor 22. p This represents the average temperature data collected by each temperature sensor 22.

[0132] T sj The temperature rise value of each cell in the battery pack 10 within a preset time period t1;

[0133] The first preset temperature rise alarm value is T. sy1 The second preset temperature rise alarm value is T. sy2 The first preset temperature value is T y1 The second preset temperature value is T y2 T y2 <T y1 T sy2 <T sy1 For example, Ty1 =8℃, T y2 =6℃, T sy1 =15℃, T sy2 =10℃; where the first preset temperature alarm value can be the average temperature data T p The first preset temperature value is T y1 The sum; the second preset temperature alarm value can be the average temperature data T. p The second preset temperature value is T y2 sum;

[0134] When it is initially determined in step S110 that there is no problem with the cells in the battery system 100, the temperature value T of any cell in the battery pack 10 is determined within a subsequent preset time period t1. j Does it exceed the first preset temperature alarm value (T)? p +T y1 ), and determine the temperature rise value T of any cell. sj Does it exceed the first preset temperature rise alarm value T? sy1 :

[0135] If T j <T p +T y1 And T sj <T sy1 If this is confirmed, it can be further determined that the battery cell is functioning normally and has no problems.

[0136] If T j ≥T p +T y1 With T sj ≥T sy1 If any one of these conditions is met, it is further determined that there is a problem with the battery cell. If the abnormal state is determined to be an abnormal voltage, a level two alarm (abnormal temperature alarm) will be triggered.

[0137] When it is initially determined in step S110 that there is a problem with the battery cell in the battery system 100, the temperature value T of any battery cell in the battery pack 10 is determined within a preset time period t1. j Does it exceed the second preset temperature alarm value (T)? p +T y2 ), and determine the temperature rise T of any cell. sj Does it exceed the second preset temperature rise alarm value T? sy2 If T j <T p +T y2 And T sj <T sy2 If this is confirmed, it can be further determined that the battery cell is functioning normally and has no problems.

[0138] If T j ≥Tp +T y2 With T sj ≥T sy2 If any one of these conditions is met, it is further determined that there is a problem with the battery cell. If the abnormal state is determined to be an abnormal voltage, a level two alarm (abnormal temperature alarm) will be triggered.

[0139] S130, via gas detector 23, is used to detect the concentration C of combustible gas within the battery pack 10. t If the concentration of combustible gas C t Exceeding the preset combustible gas concentration threshold C MAX C t ≥C MAX The abnormal state is determined to be an abnormal concentration of combustible gas, and a level three alarm (abnormal combustible gas concentration alarm) is activated; for example, C MAX =60%;

[0140] S140, after the level 3 alarm is activated, if it is determined that there is a problem with the battery pack 10, nitrogen is released into the battery pack 10 through the nitrogen tank 31 in the inflation device 30 to dilute the flammable gas and oxygen content in the air inside the battery pack 10. After the exhaust port 40 of the battery pack 10 is opened, the nitrogen tank 31 continues to release nitrogen into the battery pack 10 to reduce the flammable gas to below the explosive concentration.

[0141] This application provides a battery system 100, which includes a battery pack 10, a sensor module 20, and a gas filling device 30. The sensor module 20 is used to detect whether the battery pack 10 is in an abnormal state. The gas filling device 30 is connected to the battery pack 10 and is used to deliver inert gas into the battery pack 10. When the sensor module 20 detects that the battery pack 10 is in an abnormal state, the gas filling device 30 delivers inert gas into the battery pack 10 to control the battery pack 10. Through real-time monitoring by the sensor module 20, the battery system 100 can promptly and accurately identify abnormal states of the battery pack 10, such as abnormal voltage, increased temperature, or excessive flammable gas concentration. This helps to take preventive measures before thermal runaway or other dangerous situations occur in the battery pack 10, thereby significantly improving the safety of the battery system 100. When the sensor module 20 detects that the battery pack 10 is in an abnormal state, the gas filling device 30 quickly delivers inert gas into the battery pack 10 to quickly perform safety control processing. This rapid response mechanism can effectively prevent the spread of thermal runaway inside the battery pack 10 and reduce potential damage. The design of this battery system 100 reduces the risk of system failure caused by abnormalities in the battery pack 10 by intervening in and controlling the abnormal state of the battery pack 10 in advance, thereby enhancing the stability and reliability of the entire battery system 100.

[0142] Each unit or module in the aforementioned battery system can be implemented entirely or partially through software, hardware, or a combination thereof. These units or modules can be embedded in or independent of the processor in a computer device in hardware form, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each unit or module.

[0143] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0144] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0145] In addition, the functional units in this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0146] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer or a server) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0147] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A battery system, characterized in that, include: Battery pack; The sensor module is used to detect whether the battery pack is in an abnormal state; An inflation device, connected to the battery pack, is used to supply inert gas into the battery pack; When the sensor module detects that the battery pack is in an abnormal state, the inflation device delivers inert gas into the battery pack.

2. The battery system according to claim 1, characterized in that, The battery system also includes an exhaust port, configured to discharge the mixed gas located inside the battery pack when the battery pack reaches a preset temperature.

3. The battery system according to claim 1, characterized in that, The sensor module includes: A voltage sensor is used to detect the voltage data of the battery system; A temperature sensor is used to detect temperature data inside the battery pack. The temperature data includes the temperature value of each cell in the battery pack and the temperature rise value of each cell in the battery pack within a preset time period. A gas detector is used to detect the concentration of combustible gas in the battery pack; The sensor module determines whether the battery pack is in an abnormal state based on the voltage data, the temperature data, and the concentration of combustible gas.

4. The battery system according to claim 3, characterized in that, The sensor module is further configured as follows: When the voltage data exceeds a preset voltage threshold, it is determined to be an abnormal voltage. When the temperature value of any cell in the battery pack exceeds the preset temperature alarm value, or the temperature rise value of any cell exceeds the preset temperature rise alarm value, it is determined to be a temperature abnormality. When the concentration of combustible gas exceeds a preset combustible gas concentration threshold, it is determined to be an abnormal combustible gas concentration. If any of the voltage anomaly, temperature anomaly, or combustible gas concentration anomaly is present, the battery pack is determined to be in an abnormal state.

5. The battery system according to claim 4, characterized in that, The battery system also includes a multi-level alarm module, used to activate corresponding levels of alarms and safety control procedures based on abnormal conditions: The first-level alarm is a voltage abnormality alarm. When the abnormal state is a voltage abnormality, an audible and visual signal is issued to indicate the abnormal battery pack or abnormal cell. The second-level alarm is a temperature abnormality alarm. When the abnormality is a temperature abnormality, the input switch and output switch of the battery pack are disconnected. The level three alarm is an alarm for abnormal combustible gas concentration. When the abnormal state is an abnormal combustible gas concentration, the gas charging device is activated to deliver inert gas into the battery pack.

6. The battery system according to claim 4, characterized in that, The sensor module is further configured to dynamically adjust the preset voltage threshold, the preset temperature alarm value, the preset temperature rise alarm value, and the combustible gas concentration threshold according to the usage status of the battery system.

7. The battery system according to claim 4, characterized in that, The preset temperature alarm value includes a first preset temperature alarm value and a second preset temperature alarm value. The first preset temperature alarm value is the sum of the average temperature data and the first preset temperature value. The second preset temperature alarm value is the sum of the average temperature data and the second preset temperature value. The second preset temperature value is less than the first preset temperature value. The preset temperature rise alarm value includes a first preset temperature rise alarm value and a second preset temperature rise alarm value, wherein the second preset temperature rise alarm value is less than the first preset temperature rise alarm value. The sensor module is further configured as follows: When the voltage data does not exceed the preset voltage threshold, and the temperature value of any cell in the battery pack exceeds the first preset temperature alarm value within a preset time period, or the temperature rise value of any cell exceeds the first preset temperature rise alarm value, it is determined to be a temperature abnormality. or When the voltage data exceeds a preset voltage threshold, and the temperature value of any cell in the battery pack exceeds a second preset temperature alarm value within a preset time period, or the temperature rise value of any cell exceeds a second preset temperature rise alarm value, it is determined to be a temperature abnormality.

8. The battery system according to claim 1, characterized in that, The inflation device includes a nitrogen tank, which is connected to the inside of the battery pack via a pipe. When the sensor module detects that the battery pack is in an abnormal state, the nitrogen tank releases nitrogen into the battery pack to reduce the concentration of combustible gas inside the battery pack.

9. The battery system according to claim 8, characterized in that, The inflation device also includes an intelligent control unit, which is used to automatically adjust the nitrogen release amount of the nitrogen tank according to the change in the concentration of combustible gas in the battery pack.

10. The battery system according to claim 8, characterized in that, The inflation device also includes a spray cooling unit. When the nitrogen tank releases nitrogen into the battery pack, the spray cooling unit sprays refrigerant onto the outside of the battery pack to help reduce the temperature of the battery pack.

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