Battery safety detection method capable of effectively reducing false alarm rate, electronic equipment and computer readable storage medium

Abstract

The invention discloses a battery safety detection method capable of effectively reducing a false alarm rate, and the method comprises at least one of the following steps: obtaining working condition data of a rechargeable battery, the working condition data at least comprising expansive force data; screening the expansive force data according to a preset rule, and performing safety detection on the battery based on the screened expansive force data; acquiring working condition data of the rechargeable battery, wherein the working condition data at least comprises expansive force data and temperature data; performing safety detection on the battery based on the expansion force data and the temperature data; acquiring working condition data of the rechargeable battery, wherein the working condition data at least comprises expansive force data and voltage data; further, the invention provides an electronic device and a computer readable storage medium for implementing the method. According to the method, the false alarm rate of battery safety detection can be effectively reduced.

Description

Technical Field

[0001] The present invention relates to the field of battery detection, and particularly to a battery safety detection method, an electronic device, and a computer-readable storage medium that can effectively reduce the false alarm rate. Background Art

[0002] With the rapid development of the domestic new energy industry, the production and sales volume of new energy vehicles and the installed capacity of electrochemical energy storage have increased significantly year by year. As the most important high-voltage energy module in the power / storage system, battery safety directly determines the development scale and application scenarios of the new energy industry. In recent years, due to external incentives and its own reasons of the battery, safety accidents of automobiles and energy storage power stations have occurred frequently, becoming the biggest obstacle restricting the development of the industry.

[0003] At present, the safety of rechargeable batteries (referred to as "batteries") in the energy storage system is usually detected by a battery safety detection system. When detecting, it is usually necessary to obtain relevant operating condition data of the battery, and then judge the safety of the battery by combining these operating condition data with a preset judgment method. Therefore, when the battery safety detection system judges the safety of the battery through these data, it puts forward higher requirements for the accuracy of these operating condition data. At present, the requirements for the accuracy of operating condition data mainly focus on the accuracy of the sensors for obtaining data. For example, in order to obtain more accurate temperature data, the detection accuracy of temperature sensing should be between ±1°. However, only by putting forward high requirements for the accuracy of the sensors is not enough to support the battery safety detection system to obtain more accurate detection results. In actual operation, the accuracy of the detection results is not high, and the situation of more false alarms still occurs. Therefore, there is an urgent need to provide a battery safety detection method that can help reduce the false alarm rate. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that the existing battery safety detection system has low alarm accuracy and many false alarms, and provide a battery safety detection method that can effectively reduce the false alarm rate. By effectively screening the expansion force data and / or based on the coupling relationship between the expansion force data and other operating condition data, the alarm accuracy is improved and the false alarm rate of safety detection is reduced. Further, the present invention provides an electronic device and a computer-readable storage medium for implementing the above method.

[0005] The first aspect of the present invention discloses a battery safety detection method that can effectively reduce the false alarm rate, including at least one of the following:

[0006] Obtain the operating condition data of the rechargeable battery, and the operating condition data at least includes expansion force data;

[0007] Screen the expansion force data according to a preset rule, and perform safety detection on the battery based on the screened expansion force data;

[0008] Obtain the operating condition data of the rechargeable battery, where the operating condition data at least includes swelling force data and temperature data;

[0009] Perform safety detection on the battery based on the swelling force data and temperature data;

[0010] Obtain the operating condition data of the rechargeable battery, where the operating condition data at least includes swelling force data and voltage data;

[0011] Perform safety detection on the battery based on the swelling force data and voltage data.

[0012] As an alternative, when performing safety detection on the battery from the perspective of lithium plating, screen the swelling force data according to a preset rule, specifically including:

[0013] Screen the swelling force data only in the battery charging state.

[0014] As an alternative, screening the swelling force data according to a preset rule further includes: the duration of the swelling force data screened only in the battery charging state is not less than a preset duration.

[0015] As an alternative, the preset duration is 3 minutes.

[0016] As an alternative, performing safety detection on the battery based on the swelling force data and temperature data includes:

[0017] When the swelling force data meets the alarm condition, and at least one of the battery temperature and the battery temperature rise condition reaches the alarm condition, a detection result that the battery has a fault is made;

[0018] Performing safety detection on the battery based on the swelling force data and voltage data includes:

[0019] When the swelling force data meets the alarm condition, and the battery voltage drop rate meets the alarm condition, a detection result that the battery has a fault is made.

[0020] As an alternative, the alarm condition for the battery temperature is: the maximum battery temperature T≥65°C;

[0021] The alarm condition for the battery temperature rise condition is: the temperature rise rate≥1°C / s and lasts for more than 3s;

[0022] The alarm condition for the voltage data is: the absolute value of the voltage drops≥20% or 100mV within 5s.

[0023] As an alternative, the alarm condition for the swelling force data includes:

[0024] The expansion force of the battery exceeds a preset expansion force; or, the rate of change of the expansion force of the battery exceeds a preset rate of change of the expansion force.

[0025] As an alternative, when the operating condition data at least includes expansion force data and temperature data, and / or when the operating condition data at least includes expansion force data and voltage data:

[0026] When at least two types of operating condition data acquisition failures including the expansion force acquisition failure occur, a detection result that the battery has a failure is made.

[0027] As an alternative, when the operating condition data at least includes expansion force data and temperature data, and / or when the operating condition data at least includes expansion force data and voltage data:

[0028] When at least two types of operating condition data acquisition failures including the expansion force acquisition failure occur, and the duration of each failure exceeds a set duration, a detection result that the battery has a failure is made.

[0029] As an alternative, it further includes:

[0030] The detection result obtained by the battery safety detection system is reviewed. When the review result is consistent with the detection result, the confirmation is carried out.

[0031] As an alternative, the review scheme includes at least one of the following:

[0032] The detection result obtained by the safety detection system is reviewed in combination with other operating condition data, and the other operating condition data is the operating condition data within a preset time period after the detection result is obtained;

[0033] The detection result obtained by the safety detection system is reviewed through historical operating condition data, and the historical operating condition data is the operating condition data not used between two adjacent detections, and the detection result of one of the two adjacent detections is that the battery has a failure.

[0034] The second aspect of the present invention discloses an electronic device, including a processor and a memory; the processor is used to call a computer program stored in the memory and execute the battery safety detection method capable of effectively reducing the false alarm rate according to any one of the first aspects of the present invention.

[0035] The third aspect of the present invention discloses a computer-readable storage medium, and the computer-readable storage medium is used to store program codes, and the program codes are used to execute the battery safety detection method capable of effectively reducing the false alarm rate according to any one of the first aspects of the present invention. Detailed implementation manners

[0036] The present invention provides a battery safety detection method that can effectively reduce the false alarm rate. This method can be used in conjunction with a battery safety detection system to perform more accurate safety detection on the battery, so as to avoid false alarms and misreports, and further improve the accuracy of the battery safety detection system in detecting the safety of the battery. It can be understood that this method can be directly executed by the battery safety detection system, that is, the method of reducing the false alarm rate of the present invention can be integrated into the safety detection method adopted by the battery safety detection system; of course, this method can also be set separately and run in parallel with the battery safety detection system.

[0037] In the present invention, the battery safety detection system obtains relevant operating condition data of the battery, and then judges the safety status of the battery by combining these operating condition data through a preset judgment method. These operating condition data at least include the expansion force data of the battery. In addition, it may also include at least one of the operating condition data such as the voltage data of the battery, the current data of the battery, and the temperature data of the battery. How the battery safety detection system judges the safety status of the battery based on these operating condition data is already prior art. For example, the invention patent application with the application number 202311344438.7 and the patent name "Battery Thermal Runaway Early Warning Method, Device, Energy Storage Device, Storage Medium and Vehicle", and another example, the invention patent application with the application number 202010075804.3 and the patent name "A Method and Device for Detecting Lithium Deposition in a Lithium Battery". The specific solutions will not be elaborated in the present invention.

[0038] It can be understood that the methods for judging the safety status of the battery in different battery safety detection systems may be different. The method for reducing the false alarm rate for battery safety detection provided by the present invention mainly realizes by screening the relevant operating condition data, especially the expansion force data, based on the coupling relationship between the expansion force data and other operating condition data, and further verifying the safety detection results judged by the existing safety detection system. Therefore, the method for reducing the false alarm rate for battery safety detection provided by the present invention can be compatible with or applied to battery safety detection systems with different judgment methods.

[0039] It can be understood that the existing battery safety detection system can be set in the currently common Battery Management System (BMS), or can be set in the currently common Energy Management System (EMS), or can also be an other separate system. Of course, when the battery management system or the energy management system stores a method for detecting the safety status of the battery according to relevant operating condition data, the battery management system or the energy management system can also be equivalent to the battery safety detection system. At this time, the method provided by the present invention can also be executed by the battery management system or the energy management system.

[0040] A method for reducing the false alarm rate in battery safety detection provided by the present invention can further improve the accuracy of battery safety detection results in multiple aspects. Among them, by screening the obtained expansion force data, the expansion force data obtained within a preset time period is used as valid data for detecting battery safety, further improving the accuracy of the detection results; at the same time, comprehensive detection is carried out according to the coupling relationship between the expansion force data and other relevant operating condition data, further improving the accuracy of the detection results; for the detection results of the battery safety detection system, the detection results are reconfirmed (also known as "verified") by combining battery operating condition data, and / or the detection results are reconfirmed by historical data to improve the accuracy of the output detection results. Through the above several methods, the accuracy of the battery safety detection results output by the battery safety detection system can be further improved, and the generation of false alarm rate can be further reduced.

[0041] In the present invention, at least when the battery is in the charging state, the expansion force data on the battery surface needs to be obtained. When the battery is discharging or in a static state, the expansion force data of the battery can also be obtained. That is, the acquisition of the expansion force data is not affected by the charge and discharge state of the battery. The expansion force data of the battery can be obtained in real time or at intervals. The acquisition frequency and method are related to the actual requirements.

[0042] It can be understood that during normal charge and discharge of the battery, the relevant operating condition data will change with its charge and discharge state. For example, during charging, the temperature of the battery will gradually increase, and at the same time, with the generation of lithium plating, the battery surface will also expand. A large amount of data shows that the occurrence of battery safety hazards often occurs during the charging stage of the battery, and a large amount of lithium plating occurs when the battery is charging, and the accumulation of this lithium plating will cause the battery to bulge abnormally, which may pose a safety hazard to the battery. Therefore, in order to avoid missed detection during battery safety detection, it is necessary to further monitor the lithium plating situation of the battery. In the present invention, in order to achieve better monitoring results, the lithium plating situation of the battery is judged by obtaining the expansion force data on the battery surface. As a feasible implementation method, a thin-film pressure sensor is arranged between two batteries. When the battery expands, the battery will squeeze the thin-film pressure sensor, and the thin-film pressure sensor will generate a change in the electrical signal due to being squeezed. By obtaining the magnitude of these changed electrical signals, the corresponding expansion force magnitude can be calculated.

[0043] However, the lithium plating condition of the battery will change with the charge and discharge of the battery. During charging, significant lithium plating occurs in the battery, and during discharging, the area of partial lithium plating in the battery will shrink back. If the expansion force data of the battery during charge and discharge is directly used as the data for detecting the lithium plating condition of the battery, the accuracy of detecting the lithium plating condition of the battery will be greatly reduced, which will in turn lead to false alarms when the battery safety detection system conducts safety detection on the battery. Therefore, in the present invention, the acquisition time of the expansion force data is optimized and selected so that the obtained expansion force data can be used as valid data for detecting the lithium plating condition of the battery, thereby further improving the accuracy of the battery safety detection result.

[0044] Specifically, in the present invention, only the expansion force data of the battery during charging is acquired as the data for detecting the lithium plating condition of the battery. It can be understood that significant lithium plating occurs during the charging of the battery, and the accumulation of this lithium plating will cause the battery to bulge abnormally. These abnormal bulges will squeeze the thin-film pressure sensor, and at this time, the thin-film pressure sensor can better acquire the expansion force of these abnormal bulge points; then during discharging, some of the abnormal bulge points will shrink back, and these abnormal bulges will release the squeezing force on the thin-film pressure sensor, making it difficult to acquire the change in the expansion force of these abnormal bulge points through the thin-film pressure sensor at this time. Therefore, in the present invention, only the expansion force data of the battery during charging is acquired as the data for detecting the lithium plating condition of the battery, and the expansion force acquired by the thin-film pressure sensor during battery charging can more accurately reflect the lithium plating situation of the battery.

[0045] It can be understood that if the battery is charged and discharged frequently in a short period of time, it will cause the expansion force on the battery surface to increase and decrease frequently in a short period of time. In this case, there will be many noise points in the expansion force data obtained during the battery charging stage; at the same time, if the charging time of the battery is short, the amount of the obtained expansion force data is also difficult to support the accuracy of lithium plating analysis of the battery. In order to further optimize the effectiveness of the expansion force data, in the present invention, further restrictions are imposed on the acquisition time of the battery expansion force data: when it is recognized that the battery starts charging, lithium plating analysis of the battery will start only after the charging reaches a preset duration. The expansion force data for lithium plating analysis of the battery can also be the expansion force data from the start of battery charging until the end of battery charging, the expansion force data for lithium plating analysis of the battery can also be the expansion force data of any section not less than the preset duration during the charging process, and the expansion force data for lithium plating analysis of the battery can also be the expansion force data from the start of battery charging until the current time.

[0046] It is understandable that by restricting the acquisition conditions of the swelling force data, it is possible to avoid the phenomenon of chaotic swelling force data and more noise points in the swelling force data caused by frequent charging and discharging of the battery. At the same time, restricting the charging duration of the battery can ensure the stability of the swelling force data. Moreover, a large amount of acquired data can also improve the accuracy of the judgment result and further avoid false alarms.

[0047] The present invention does not specifically limit the preset duration. The preset duration can be adaptively set according to different batteries. The preset duration can be 1 minute, the preset duration can also be 3 minutes, the preset duration can also be 5 minutes, and of course the preset duration can also be other times.

[0048] As a preferred solution, the preset duration is 3 minutes, that is, it is necessary to analyze and judge the lithium deposition situation of the battery only after the single charging duration of the battery is not less than 3 minutes. That is to say, when it is recognized that the battery starts charging, the lithium deposition situation of the battery is analyzed and judged 3 minutes later. The swelling force data used for judgment can be the swelling force data from the start of battery charging to the current swelling force data, or the swelling force data of any continuous duration not less than 3 minutes during the battery charging process. The reason why the present invention sets a preset duration of 3 minutes is that at least the swelling force data of the battery obtained under this duration is more conducive to judging the lithium deposition of the battery, and judging the lithium deposition situation of the battery through these data can obtain a more accurate judgment result, thereby avoiding false alarms.

[0049] Furthermore, when there is a situation where the current in the charging state is the discharge current, this scenario does not rule out problems such as on-site debugging, external circuit failures such as external short circuits or DC-side charging network problems. At this time, the obtained swelling force data needs to be filtered. That is to say, when the battery is charging and discharging simultaneously, even if the charging duration of the battery exceeds the preset duration, the obtained swelling force data will be abnormal due to the battery discharging simultaneously. At this time, if the swelling force data is used to analyze and judge the lithium deposition situation of the battery, false judgment is likely to occur. In the present invention, the swelling force data used for analyzing the lithium deposition situation of the battery is further restricted. Only the swelling force data obtained when the battery is in the charging state can be used to judge the lithium deposition situation of the battery, and the swelling force data when the battery is charging and discharging simultaneously cannot be used to judge the lithium deposition situation of the battery, further improving the accuracy of lithium deposition detection of the battery.

[0050] As one of the solutions, according to the coupling relationship between relevant operating condition data, that is, by comprehensively evaluating various operating condition data, the accuracy of the detection result is further improved. It can be understood that when a battery fails or undergoes thermal runaway, it is often accompanied by changes in various types of data. For example, the temperature will rise, the expansion force will increase, and the gas concentration will increase, etc. And there is often a certain coupling mechanism between these operating condition data, and through the relevant coupling mechanism, it can be further confirmed whether the battery has failed.

[0051] For example, there is a certain coupling relationship between the expansion force data of the battery and the temperature data of the battery. When the battery expands, the temperature will rise. Therefore, when the expansion force data of the battery reflects a continuous increase, the temperature data needs to be monitored simultaneously. If the temperature data shows a downward trend at this time, it may be that the temperature detection is abnormal or the expansion force detection is abnormal. At this time, if the safety failure of the battery is directly judged based on the expansion force data of the battery, false alarms are bound to occur. Therefore, in the present invention, by combining and judging various operating condition data, the accuracy of the detection result is further improved.

[0052] As an implementation manner, when the expansion force of the battery meets the alarm condition, at least one of the following conditions needs to be met simultaneously before the fault result can be confirmed and pushed: the maximum battery temperature T≥65°C; or, the battery temperature rise rate≥1°C / s for more than 3 s; or, the absolute value of the voltage drops≥20% or 100 mV within 5 s.

[0053] The following is an example of the solution for whether the expansion force of the battery meets the alarm condition, but it is not a limitation: the alarm condition is met when the magnitude of the expansion force of the battery exceeds the preset expansion force magnitude; or, the alarm condition is met when the change rate of the expansion force of the battery exceeds the preset expansion force change rate.

[0054] As one of the solutions, when both the expansion force acquisition failure and other dimension data acquisition failures occur simultaneously, it is directly determined that the battery has failed. It can be understood that during thermal runaway, the pressure relief valve of the battery pack will erupt, which may cause the acquisition of relevant operating condition data to fail, and then it is impossible to continue collecting relevant data. If the operating condition data in this case is directly determined as invalid data or directly judged as a simple collector failure, it may lead to missed alarms, and if this situation is directly determined as a battery failure for alarm, false alarms may occur. In the present invention, no alarm is given when only the expansion force acquisition failure occurs, and an alarm is given when both the expansion force acquisition failure and other dimension data acquisition failures occur simultaneously, which can avoid false alarms caused by the failure of a single data acquisition.

[0055] Further, when the fault duration of both the expansion force acquisition fault and other dimensional data acquisition faults exceeds the set duration, it is determined that the battery has failed. If the expansion force acquisition fault and other dimensional data acquisition faults return to normal within a short time after the fault occurs, it proves that the data collector for this dimension has not been damaged due to the thermal runaway of the battery. In this case, if it is directly determined that the battery has failed, false alarms are likely to occur. In the present invention, whether a fault occurs is determined by combining the expansion force acquisition fault and other dimensional data acquisition faults with the duration of the fault, rather than starting to determine that the battery has failed once the expansion force acquisition fault and other dimensional data acquisition faults are determined, which can improve the accuracy of judging battery faults and further reduce the occurrence of false alarms. For example, when an expansion force acquisition fault and a temperature data acquisition fault occur, the duration of the fault is obtained. When the durations of both the expansion force acquisition fault and the temperature data acquisition fault exceed the set time, it is determined that the battery has failed.

[0056] Further, when the sensor only used to obtain the expansion force has an acquisition fault, for example, when the acquired expansion force data does not change within a certain time, or the acquired expansion force is an abnormal value such as 0, the expansion force data is not pushed. In this case, the obtained expansion force will cause a large deviation in the algorithm and needs to be filtered out specifically. Among them, the abnormal data can be filtered through a pre-set algorithm, that is, the invalid or low-quality data is effectively distinguished from the real fault abnormal data. In the present invention, the types of invalid / low-quality data are fixed, which is more convenient to distinguish these data to eliminate these invalid data. Whether the relevant data is reliable is judged through the status information of the sensor and the relevant acquisition data, thus improving the problem that the prior art ignores the possible abnormalities of the collector itself. Reliable data can further improve the detection result of battery safety detection and reduce the occurrence of false alarms.

[0057] Further, the false alarm rate is further reduced by adding a review function. That is, the detection result output by the battery safety detection system is reviewed (i.e., secondarily confirmed) to further judge the accuracy of the result, thereby reducing the occurrence of the false alarm rate.

[0058] The battery safety detection system uses real-time data for calculation, and there may be occasional real-time smoothing filtering distortion of noise caused by data quality problems. In such a scenario, the detection results after calculation and recognition are often inaccurate, which will lead to a high false alarm rate. For example, most of the temperature data is relatively stable within a period of time, and there is a single-point temperature data with a relatively high value. This situation may be a problem of data acquisition quality rather than a battery failure. If the battery safety detection system detects the safety status of the battery based on the relatively high single-point temperature data, false alarms may occur. In the present invention, when the battery safety detection system detects a battery failure, the result needs to be reviewed, and after confirming the same detection result, it is pushed, thereby effectively reducing the occurrence of false alarms.

[0059] In the present invention, there are the following two schemes for reviewing the detection results:

[0060] Scheme 1: After the battery safety detection system detects a battery failure, continue to analyze the subsequent operating condition data. If the same detection result as the previous failure also appears within a preset time period, the failure is pushed. The preset time period can be 5 seconds, 10 seconds, 15 seconds, 20 seconds, etc. after the battery safety detection system makes the detection result.

[0061] Scheme 2: When one of the two adjacent detections by the battery safety detection system indicates that the battery has a failure and the other indicates that the battery has no failure, and there is operating condition data during these two detections that has not been used to judge the battery safety detection, the battery safety detection system analyzes this operating condition data to determine whether the battery has a failure through this data. When the judgment result is that there is a failure, the failure is pushed. It can be understood that the operating condition data of the battery can be obtained continuously, but the battery safety detection system may perform the battery safety detection at intervals. That is, after the battery safety detection system completes the current safety detection of the battery, it will perform the next safety detection of the battery after an interval of time. The operating condition data between these two detections is continuously obtained and stored. Therefore, using the unused operating condition data in this interval for secondary confirmation can further reduce the occurrence of false alarms.

[0062] Furthermore, the present invention also discloses an electronic device, which mainly includes a processor and a memory. Among them, the memory is used to store program codes and transmit the program codes to the processor; the processor is used to execute the battery safety detection method provided by the present invention that can effectively reduce the false alarm rate according to the instructions in the program codes.

[0063] Furthermore, the present invention also provides a computer-readable storage medium. The computer-readable storage medium is used to store program codes, and the program codes are used to execute the battery safety detection method provided by the present invention that can effectively reduce the false alarm rate.

[0064] Those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working processes of the program codes in the above-described electronic devices and computer-readable storage media can refer to the corresponding processes in the foregoing method embodiments, and will not be described herein again.

[0065] Finally, it should be noted that the above-mentioned, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery safety detection method capable of effectively reducing the false alarm rate, characterized in that, Include at least one of the following: Obtain the operating condition data of the rechargeable battery, where the operating condition data includes at least swelling force data; Screen the swelling force data according to a preset rule, and perform a safety detection on the battery based on the screened swelling force data; Obtain the operating condition data of the rechargeable battery, where the operating condition data includes at least swelling force data and temperature data; Perform a safety detection on the battery based on the swelling force data and the temperature data; Obtain the operating condition data of the rechargeable battery, where the operating condition data includes at least swelling force data and voltage data; Perform a safety detection on the battery based on the swelling force data and the voltage data.

2. The battery safety detection method according to claim 1, wherein When performing a safety detection on the battery from the perspective of lithium plating, screening the swelling force data according to a preset rule specifically includes: Screen the swelling force data only in the battery charging state.

3. The battery safety detection method according to claim 2, wherein According to the preset rule for screening the swelling force data, it further includes: the duration of the screened swelling force data only in the battery charging state is not less than a preset duration.

4. The battery safety detection method according to claim 3, wherein The preset duration is 3 minutes.

5. The battery safety detection method according to claim 1, wherein, Performing a safety detection on the battery based on the swelling force data and the temperature data includes: When the swelling force data meets the alarm condition, and at least one of the battery temperature and the battery temperature rise condition reaches the alarm condition, a detection result that the battery has a fault is made; Performing a safety detection on the battery based on the swelling force data and the voltage data includes: When the swelling force data meets the alarm condition, and the battery voltage drop rate meets the alarm condition, a detection result that the battery has a fault is made.

6. The battery safety detection method according to claim 5, characterized in that The alarm condition for the battery temperature is: the maximum battery temperature T≥65°C; The alarm condition for the battery temperature rise condition is: the temperature rise rate≥1°C / s and lasts for more than 3s; The alarm condition for the voltage data is: the absolute value of the voltage drops≥20% or 100mV within 5s.

7. The battery safety detection method according to claim 5, wherein The alarm condition for the swelling force data includes: The magnitude of the swelling force of the battery exceeds the preset swelling force magnitude; or, the swelling force change rate of the battery exceeds the preset swelling force change rate.

8. The battery safety detection method according to claim 1, wherein, When the operating condition data includes at least swelling force data and temperature data, and / or, the operating condition data includes at least swelling force data and voltage data: When at least two types of operating condition data acquisition failures including swelling force acquisition failure occur, a detection result that the battery has a fault is made.

9. The battery safety detection method according to claim 1, wherein, When the operating condition data includes at least swelling force data and temperature data, and / or, the operating condition data includes at least swelling force data and voltage data: When at least two types of operating condition data acquisition failures including swelling force acquisition failure occur, and the failure duration of each exceeds the set duration, a detection result that the battery has a fault is made.

10. The battery safety detection method according to any one of claims 1 to 9, characterized in that, It further includes: Recheck the detection result obtained by the battery safety detection system, and confirmation is only carried out when the recheck result is consistent with the detection result.

11. The battery safety detection method according to claim 10, characterized in that, The recheck scheme includes at least one of the following: Recheck the detection result obtained by the safety detection system in combination with other operating condition data, where the other operating condition data is the operating condition data within a preset time period after the detection result is obtained; Recheck the detection results obtained by the safety detection system through historical operating condition data, where the historical operating condition data is the operating condition data not used between two adjacent detections, and the detection result of one of the two adjacent detections is that the battery has a fault.

12. An electronic device, characterized in that, It includes a processor and a memory; the processor is used to call the computer program stored in the memory and execute the battery safety detection method capable of effectively reducing the false alarm rate according to any one of claims 1 to 11.

13. A computer-readable storage medium, characterized in that, The computer-readable storage medium is used to store program codes, and the program codes are used to execute the battery safety detection method capable of effectively reducing the false alarm rate according to any one of claims 1 to 11.