A battery thermal runaway warning verification method, device, terminal and storage medium

Abstract

The present invention belongs to the field of power battery technology, and specifically relates to a battery thermal runaway warning verification method, device, terminal, and storage medium. The present invention adds a redundant verification design to the identification of the key characteristic pressure value of the thermal runaway warning, arranges dual pressure sensors, one inside and one outside the control system, and uses different power supply methods and sampling chips to avoid common cause failures. It also adds multiple verification modes to the sensor diagnosis and pressure data to improve the reliability of the pressure signal. It also uses a method to verify the changes in the thermal runaway warning characteristic dimension with other battery dimensions to reduce the false alarm rate.

Description

Technical Field

[0001] The present invention belongs to the technical field of power batteries, and in particular to a battery thermal runaway early warning verification method, device, terminal and storage medium. Background Art

[0002] Thermal runaway is a key issue in battery safety research and a key and challenging aspect of battery management systems' early warning of battery failures. To address the safety concerns brought on by thermal runaway, numerous early warning methods have emerged, primarily in three categories: One involves the battery management system detecting real-time temperature and voltage changes in the battery through temperature and voltage sensors, and determining the battery's safety status based on these trends; another involves establishing a battery thermal model and comparing the model's calculated results with preset values ​​to determine the battery's thermal state; and another involves adding external sensors to detect gas concentrations, pressure signals, and other indicators to provide early warning of thermal runaway.

[0003] At present, the early warning methods of battery management systems for battery thermal runaway usually focus on judging the rate of change of temperature and voltage, or adding smoke sensors, pressure sensors and other equipment for safety precautions.

[0004] However, the above method is easily affected by sampling accuracy and sampling failure when judging from the dimensions of temperature and voltage changes, and there is a risk of false alarms; and the measures of adding smoke sensors and pressure sensors, although they can ensure the accuracy of early warning from multiple dimensions, also increase the risk of potential functional failure of the system. Summary of the Invention

[0005] This invention provides a battery thermal runaway warning verification method, device, terminal, and storage medium. This invention synchronizes the thermal runaway warning verification functions on the edge and cloud, achieving cloud-edge collaborative thermal runaway warning verification through interactive real-time sampling data and verification validity signals. This improves the reliability of the edge thermal runaway warning function and addresses safety issues such as false alarms and vehicle power outages caused by existing battery thermal runaway warning devices.

[0006] The technical solution of the present invention is described as follows in conjunction with the accompanying drawings:

[0007] According to a first aspect of an embodiment of the present invention, a battery thermal runaway warning verification method is provided, comprising:

[0008] Step 1: Collect data from the built-in pressure sensor and the external pressure sensor, and diagnose whether the built-in pressure sensor and the external pressure sensor have any faults;

[0009] Step 2: If any of the built-in pressure sensor data and the external pressure sensor fails, no pressure calibration is performed, and the output pressure sensor calibration limited signal value is 0 and sent to the thermal runaway warning feature calibration module. If both the built-in pressure sensor data and the external pressure sensor data are normal, the output pressure calibration validity signal value is sent to the thermal runaway warning feature calibration module after calibration, and the working mode of the battery system is determined; when the battery system is in the pressure abnormality wake-up start mode, step 3 is executed; when the battery system is in the normal power-on start mode, step 4 is executed;

[0010] Step 3: When the battery system is in the abnormal pressure wake-up start mode, the pressure state is detected in real time. If the pressure change exceeds the stored predetermined pressure threshold, the battery system is reversely awakened to enter the normal power-on start mode, and the pressure value stored Δt time before the reverse wake-up is verified with the real-time detected pressure value;

[0011] Step 4: When the battery system is in normal power-on startup mode, collect and calculate battery data; the collected and calculated battery data includes all battery cell voltages, battery temperatures, and battery insulation resistances. The collected and calculated battery data and detection hardware are diagnosed, and the battery data and fault signals are output to the thermal runaway warning feature verification module and the cloud-edge collaborative thermal runaway warning verification module.

[0012] Step 5: When the thermal runaway warning feature verification module receives a finite value of 0 from any pressure sensor verification signal, it does not perform verification of pressure and other thermal runaway features; otherwise, it performs verification; if it receives a battery data sampling failure, it does not perform pressure verification; otherwise, it performs verification.

[0013] Step 6: The cloud-based thermal runaway warning feature verification module uses the battery data uploaded by the edge, the pressure data of the built-in pressure sensor, and the pressure data of the external pressure sensor to synchronously run the thermal runaway warning verification on the cloud;

[0014] Step 7: The thermal runaway warning module receives pressure data from built-in and external pressure sensors, battery data, thermal runaway feature verification validity signals, and cloud-based thermal runaway warning verification validity signals to determine whether there is a thermal runaway risk and perform corresponding warning processing and prompts.

[0015] Preferably, the step 1 of diagnosing whether the built-in pressure sensor and the external pressure sensor are faulty includes:

[0016] (1) Check whether the power supply of the built-in pressure sensor and the external pressure sensor has abnormal power supply faults. If there are no faults, perform the diagnosis of (2), (3), (4), and (5). If there are faults, output the pressure sensor power supply fault to the sensor diagnosis and verification module;

[0017] (2) Detect whether the drive of the built-in pressure sensor and the external pressure sensor has abnormal drive failure. If there is no failure, perform diagnosis (3), (4), and (5). If there is a failure, output the pressure sensor drive failure to the sensor diagnosis and verification module;

[0018] (3) Detect whether the reverse wake-up signals of the built-in pressure sensor and the external pressure sensor have abnormal wake-up signal faults. If there are no faults, perform the diagnosis of (4) and (5). If there are faults, output the pressure sensor reverse wake-up signal fault to the sensor diagnosis and verification module;

[0019] (4) Detect whether there is any abnormal communication fault between the built-in pressure sensor and the external pressure sensor. If there is no fault, perform the diagnosis of (5). If there is a fault, output the abnormal communication fault of the pressure sensor to the sensor diagnosis and verification module;

[0020] (5) Detect the pressure sensor sampling and diagnose whether it has abnormal sampling fault. If there is no fault, return to (4) for diagnosis. If there is no fault, return to (4) for diagnosis. If there is a fault, output the pressure sensor sampling fault to the sensor diagnosis and verification module.

[0021] Preferably, the specific method of verification in step 2 is as follows:

[0022] If ΔP>P check Duration t1, or ΔP t >P tcheck If the duration is t2, the output pressure verification validity signal value is 0 and sent to the thermal runaway warning feature verification module; otherwise, the output pressure verification validity signal value is 1 and sent to the thermal runaway warning feature verification module;

[0023] Wherein, ΔP=|P1-P2|, P1 is the pressure value collected by the built-in pressure sensor, and P2 is the pressure value collected by the external pressure sensor;

[0024] ΔP t =|dP1 / dt-dP2 / dt|, dP1 / dt is the pressure change rate collected by the built-in pressure sensor, and dP2 / dt is the pressure change rate collected by the external pressure sensor;

[0025] P check is the pressure difference calibration threshold, P tcheck It is the pressure change rate verification threshold, and the value range of t1 and t2 is 1-3 seconds.

[0026] Preferably, the specific method of verification in step 3 is as follows:

[0027] If P1-P b1 >P check or P2P b2 >Pcheck If the value is 1, the output pressure wake-up verification validity signal is sent to the thermal runaway warning feature verification module; otherwise, the output pressure wake-up verification validity signal is sent to the thermal runaway warning feature verification module;

[0028] Among them, P1 is the pressure value collected by the built-in pressure sensor, and P2 is the pressure value collected by the external pressure sensor.

[0029] Preferably, the specific method of verification in step 5 is as follows:

[0030] The conditions for calibrating pressure and battery temperature changes are as follows:

[0031] (1)ΔP1>P fault or ΔP2>P fault or ΔP t1 >P tfault or ΔP t2 >P tfault Established;

[0032] Among them, ΔP1 is the pressure value change of each sampling cycle of the built-in pressure sensor, ΔP t1 is the pressure value change rate of the built-in pressure sensor, ΔP2 is the pressure value change per sampling cycle of the external pressure sensor, ΔP t2 is the rate of change of the pressure value of the external pressure sensor, P fault is the pressure difference threshold for verification with other characteristic signals, P tfault It is the pressure change rate threshold value for verification with other characteristic signals;

[0033] (2) Any ΔT battn >T fault Established;

[0034] Where, ΔT battn is the rate of change of each temperature, T fault is the temperature change rate threshold for pressure calibration;

[0035] If conditions (1) and (2) occur within a fixed time window Δt judge The output pressure and battery temperature characteristic verification validity signal is sent to the thermal runaway warning module; when any condition is met, the time window starts counting. If another condition is not met within the fixed time window, the timer is reset to zero and the timer will be restarted when any condition is met again.

[0036] The conditions for pressure and insulation change testing are as follows:

[0037] (1)ΔP1>P fault or ΔP2>P fault or ΔP t1 >P tfaultor ΔP t2 >P tfault Established;

[0038] Among them, ΔP1 is the pressure value change of each sampling period of the built-in pressure sensor, P fault is the pressure difference threshold for verification with other characteristic signals, ΔP2 is the pressure value change of each sampling cycle of the external pressure sensor, ΔP t1 is the pressure value change rate of the built-in pressure sensor, P tfault It is the pressure change rate threshold value for verification with other characteristic signals;

[0039] (2)ΔR1>R fault or ΔR2>R fault Established;

[0040] Among them, R fault It is the insulation change threshold for pressure calibration, ΔR1 and ΔR2 are the insulation resistance changes between the positive electrode and the ground and the negative electrode and the ground;

[0041] If conditions (1) and (2) occur within a fixed time window Δt judge The output pressure and insulation characteristic verification validity signal is sent to the thermal runaway warning module; when any condition is met, the time window starts counting. If another condition is not met within the fixed time window, the timer is reset to zero and the timer will be restarted when any condition is met again.

[0042] The conditions for pressure and voltage change calibration are as follows:

[0043] (1)ΔP1>P fault or ΔP2>P fault or ΔP t1 >P tfault or ΔP t2 >P tfault Established;

[0044] Among them, ΔP1 is the pressure value change of each sampling period of the built-in pressure sensor, P fault is the pressure difference threshold for verification with other characteristic signals, ΔP2 is the pressure value change of each sampling cycle of the external pressure sensor, ΔP t1 is the pressure value change rate of the built-in pressure sensor, P tfault It is the pressure change rate threshold value for verification with other characteristic signals;

[0045] (2) Any ΔV battn >V fault Established;

[0046] Where, if conditions (1) and (2) occur within a fixed time window Δt judgeThe output pressure and cell voltage characteristic verification validity signal is sent to the thermal runaway warning module; when any condition is met, the time window starts to count. If another condition is not met within the fixed time window, the timer is reset to zero and the timer is restarted when any condition is met again; Δt judge The time value range can be adjusted according to the changes in thermal runaway characteristics of different batteries.

[0047] Preferably, the specific method of step six is ​​as follows:

[0048] Use the same sensor diagnosis and verification module and thermal runaway warning feature verification module as the edge to perform cloud-based thermal runaway warning verification on the edge and cloud operation results; the validity signals of the cloud-based thermal runaway warning verification include the cloud-based pressure and battery temperature feature verification validity signal, the cloud-based pressure and insulation feature verification validity signal, and the cloud-based pressure and single cell voltage feature verification validity signal.

[0049] Preferably, the specific method of step seven is as follows:

[0050] (1) If any pressure and battery temperature feature verification validity signal is set to 1 and any battery temperature is greater than the thermal runaway warning temperature threshold, the thermal runaway warning is triggered; otherwise, the thermal runaway warning is not triggered;

[0051] (2) If any pressure and insulation feature verification validity signal is set to 1 and any battery insulation resistance is lower than the thermal runaway warning insulation resistance threshold, the thermal runaway warning is triggered; otherwise, the thermal runaway warning is not triggered;

[0052] (3) If any pressure and cell voltage feature verification validity signal is set to 1, and any battery cell voltage is lower than the thermal runaway warning cell voltage threshold, the thermal runaway warning is triggered; otherwise, the thermal runaway warning is not triggered;

[0053] Any of the conditions (1)-(3) triggers a thermal runaway warning, and timely thermal runaway warning protection measures are implemented, and a thermal runaway warning prompt is given to the user on the system display device.

[0054] According to a second aspect of an embodiment of the present invention, a battery thermal runaway warning verification device is provided, comprising:

[0055] Sensor diagnostic module, used to diagnose dual sensor drive, sensor reverse wake-up signal, sensor power supply, sensor communication, and sensor sampling;

[0056] Sensor calibration module, used to calibrate pressure value and pressure change rate;

[0057] Abnormal wake-up verification module, used for pressure storage before wake-up and pressure verification before and after wake-up;

[0058] Battery data acquisition, calculation, and diagnosis module, used to collect and calculate battery cell voltage, battery temperature, and battery insulation resistance, and diagnose sampling faults;

[0059] The cloud-edge collaborative thermal runaway warning verification module is used to interact with cloud-edge data and verify thermal runaway warnings;

[0060] Thermal runaway warning feature verification module, used to identify thermal runaway warnings, process thermal runaway warnings, and issue prompts for thermal runaway warnings;

[0061] The thermal runaway warning module is used to identify thermal runaway warnings, perform early warning processing on thermal runaways, and provide early warning prompts on thermal runaways.

[0062] According to a third aspect of an embodiment of the present invention, a terminal is provided, including:

[0063] one or more processors;

[0064] a memory for storing the one or more processor-executable instructions;

[0065] The one or more processors are configured to:

[0066] Execute the method described in the first aspect of the embodiment of the present invention.

[0067] According to a fourth aspect of an embodiment of the present invention, a non-transitory computer-readable storage medium is provided. When instructions in the storage medium are executed by a processor of a terminal, the terminal is enabled to execute the method described in the first aspect of the embodiment of the present invention.

[0068] According to a fifth aspect of the embodiments of the present invention, an application product is provided. When the application product is running on a terminal, the terminal executes the method described in the first aspect of the embodiments of the present invention.

[0069] The beneficial effects of the present invention are:

[0070] 1) The present invention deploys dual pressure sensors, placed inside and outside the control system, respectively, using different power supply methods and sampling chips to avoid common cause failures. It also adds multiple verification modes for sensor diagnosis and pressure data to improve the reliability of the pressure signal.

[0071] 2) The present invention designs multiple verification modes for the signal validity of key characteristics of battery thermal runaway. Combined with the thermal runaway warning function, this not only ensures rapid warning, but also improves the reliability of the warning, thereby reducing the false alarm rate.

[0072] 3) The present invention adopts a cloud-edge collaborative double-layer early warning verification method to avoid missed detection of thermal runaway risks caused by unilateral system failure.

[0073] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] Figure 1 is a schematic block diagram of a battery thermal runaway early warning verification method and device according to an exemplary embodiment;

[0075] Figure 2 This is a flow chart showing a battery thermal runaway warning verification method according to an exemplary embodiment;

[0076] Figure 3 is a schematic block diagram of a battery thermal runaway early warning verification method according to an exemplary embodiment;

[0077] Figure 4 is a schematic block diagram of a battery thermal runaway early warning verification system according to an exemplary embodiment;

[0078] Figure 5 This is a schematic block diagram of the structure of a battery thermal runaway warning verification device according to an exemplary embodiment;

[0079] Figure 6 The figure is a schematic block diagram of a terminal structure according to an exemplary embodiment.

[0080] Specific implementation mode

[0081] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0082] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0083] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0084] An embodiment of the present invention provides a battery thermal runaway warning verification method, which is implemented by a terminal. The terminal can be a smart phone, a desktop computer, or a laptop computer, and the terminal includes at least a CPU.

[0085] Example 1

[0086] See Figure 1-Figure 3 An embodiment of the present invention provides a battery thermal runaway warning verification method, which is used in a terminal and includes the following steps:

[0087] Step 1: Collect data from the built-in pressure sensor and the external pressure sensor, and diagnose whether the built-in pressure sensor and the external pressure sensor have any faults;

[0088] The present invention arranges dual pressure sensors, one inside the control system and one outside the control system, respectively, and adopts different power supply modes and sampling chips to avoid common cause failure.

[0089] The dual pressure sensor may also use other sensors that detect thermal runaway characteristics, such as temperature sensors, smoke sensors, single-cell voltage sensors, etc.;

[0090] Diagnosing whether the built-in pressure sensor and the external pressure sensor have any faults includes:

[0091] (1) Check whether the power supply of the built-in pressure sensor and the external pressure sensor has abnormal power supply faults. If there are no faults, perform the diagnosis of (2), (3), (4), and (5). If there are faults, output the pressure sensor power supply fault to the sensor diagnosis and verification module;

[0092] (2) Detect whether the drive of the built-in pressure sensor and the external pressure sensor has abnormal drive failure. If there is no failure, perform diagnosis (3), (4), and (5). If there is a failure, output the pressure sensor drive failure to the sensor diagnosis and verification module;

[0093] (3) Detect whether the reverse wake-up signals of the built-in pressure sensor and the external pressure sensor have abnormal wake-up signal faults. If there are no faults, perform the diagnosis of (4) and (5). If there are faults, output the pressure sensor reverse wake-up signal fault to the sensor diagnosis and verification module;

[0094] (4) Detect whether there is any abnormal communication fault between the built-in pressure sensor and the external pressure sensor. If there is no fault, perform the diagnosis of (5). If there is a fault, output the abnormal communication fault of the pressure sensor to the sensor diagnosis and verification module;

[0095] (5) Detect the pressure sensor sampling and diagnose whether it has abnormal sampling fault. If there is no fault, return to (4) for diagnosis. If there is no fault, return to (4) for diagnosis. If there is a fault, output the pressure sensor sampling fault to the sensor diagnosis and verification module.

[0096] Step 2: If any of the built-in pressure sensor data and the external pressure sensor fails, no pressure calibration is performed, and the output pressure sensor calibration limited signal value is 0 and sent to the thermal runaway warning feature calibration module. If both the built-in pressure sensor data and the external pressure sensor data are normal, the output pressure calibration validity signal value is sent to the thermal runaway warning feature calibration module after calibration, and the working mode of the battery system is determined; when the battery system is in the pressure abnormality wake-up start mode, step 3 is executed; when the battery system is in the normal power-on start mode, step 4 is executed;

[0097] The specific verification method is as follows:

[0098] If ΔP>P check Duration t1, or ΔP t >P tcheck If the duration is t2, the output pressure verification validity signal value is 0 and sent to the thermal runaway warning feature verification module; otherwise, the output pressure verification validity signal value is 1 and sent to the thermal runaway warning feature verification module;

[0099] Wherein, ΔP=|P1-P2|, P1 is the pressure value collected by the built-in pressure sensor, and P2 is the pressure value collected by the external pressure sensor;

[0100] ΔP t =|dP1 / dt-dP2 / dt|, dP1 / dt is the pressure change rate collected by the built-in pressure sensor, and dP2 / dt is the pressure change rate collected by the external pressure sensor;

[0101] P check is the pressure difference calibration threshold, P tcheck It is the pressure change rate verification threshold, and the value range of t1 and t2 is 1-3 seconds.

[0102] Step 3: When the battery system is in the abnormal pressure wake-up start mode, the pressure state is detected in real time. If the pressure change exceeds the stored predetermined pressure threshold, the battery system is reversely awakened to enter the normal power-on start mode, and the pressure value stored Δt time before the reverse wake-up is verified with the real-time detected pressure value;

[0103] The specific verification method is as follows:

[0104] If P1-P b1 >P check or P2P b2 >P check If the value is 1, the output pressure wake-up verification validity signal is sent to the thermal runaway warning feature verification module; otherwise, the output pressure wake-up verification validity signal is sent to the thermal runaway warning feature verification module;

[0105] Among them, P1 is the pressure value collected by the built-in pressure sensor, and P2 is the pressure value collected by the external pressure sensor.

[0106] Step 4: When the battery system is in normal power-on startup mode, collect and calculate battery data; the collected and calculated battery data includes all battery cell voltages, battery temperatures, and battery insulation resistances. The collected and calculated battery data and detection hardware are diagnosed, and the battery data and fault signals are output to the thermal runaway warning feature verification module and the cloud-edge collaborative thermal runaway warning verification module.

[0107] Step 5: When the thermal runaway warning feature verification module receives a finite value of 0 from any pressure sensor verification signal, it does not perform verification of pressure and other thermal runaway features; otherwise, it performs verification; if it receives a battery data sampling failure, it does not perform pressure verification; otherwise, it performs verification.

[0108] The specific verification method is as follows:

[0109] The conditions for calibrating pressure and battery temperature changes are as follows:

[0110] (1)ΔP1>P fault or ΔP2>P fault or ΔP t1 >P tfault or ΔP t2 >P tfault Established;

[0111] Among them, ΔP1 is the pressure value change of each sampling cycle of the built-in pressure sensor, ΔP t1 is the pressure value change rate of the built-in pressure sensor, ΔP2 is the pressure value change per sampling cycle of the external pressure sensor, ΔP t2 is the rate of change of the pressure value of the external pressure sensor, P faultis the pressure difference threshold for verification with other characteristic signals, P tfault It is the pressure change rate threshold value for verification with other characteristic signals;

[0112] (2) Any ΔT battn >T fault Established;

[0113] Where ΔT battn is the rate of change of each temperature, T fault is the temperature change rate threshold for pressure calibration;

[0114] If conditions (1) and (2) occur within a fixed time window Δt judge The output pressure and battery temperature characteristic verification validity signal is sent to the thermal runaway warning module; when any condition is met, the time window starts counting. If another condition is not met within the fixed time window, the timer is reset to zero and the timer will be restarted when any condition is met again.

[0115] The conditions for pressure and insulation change testing are as follows:

[0116] (1)ΔP1>P fault or ΔP2>P fault or ΔP t1 >P tfault or ΔP t2 >P tfault Established;

[0117] Among them, ΔP1 is the pressure value change of each sampling period of the built-in pressure sensor, P fault is the pressure difference threshold for verification with other characteristic signals, ΔP2 is the pressure value change of each sampling cycle of the external pressure sensor, ΔP t1 is the pressure value change rate of the built-in pressure sensor, P tfault It is the pressure change rate threshold value for verification with other characteristic signals;

[0118] (2)ΔR1>R fault or ΔR2>R fault Established;

[0119] Among them, R fault It is the insulation change threshold for pressure calibration, ΔR1 and ΔR2 are the insulation resistance changes between the positive electrode and the ground and the negative electrode and the ground;

[0120] If conditions (1) and (2) occur within a fixed time window Δt judge The output pressure and insulation characteristic verification validity signal is sent to the thermal runaway warning module; when any condition is met, the time window starts counting. If another condition is not met within the fixed time window, the timer is reset to zero and the timer will be restarted when any condition is met again.

[0121] The conditions for pressure and voltage change calibration are as follows:

[0122] (1)ΔP1>P fault or ΔP2>P fault or ΔP t1 >P tfault or ΔP t2 >P tfault Established;

[0123] Among them, ΔP1 is the pressure value change of each sampling period of the built-in pressure sensor, P fault is the pressure difference threshold for verification with other characteristic signals, ΔP2 is the pressure value change of each sampling cycle of the external pressure sensor, ΔP t1 is the pressure value change rate of the built-in pressure sensor, P tfault It is the pressure change rate threshold value for verification with other characteristic signals;

[0124] (2) Any ΔV battn >V fault Established;

[0125] Where, if conditions (1) and (2) occur within a fixed time window Δt judge The output pressure and cell voltage characteristic verification validity signal is sent to the thermal runaway warning module; when any condition is met, the time window starts to count. If another condition is not met within the fixed time window, the timer is reset to zero and the timer is restarted when any condition is met again; Δt judge The time value range can be adjusted according to the changes in thermal runaway characteristics of different batteries.

[0126] Step 6: The cloud-based thermal runaway warning feature verification module uses the battery data uploaded by the edge, the pressure data of the built-in pressure sensor, and the pressure data of the external pressure sensor to synchronously run the thermal runaway warning verification on the cloud;

[0127] Use the same sensor diagnosis verification module and thermal runaway warning feature verification module as the edge to perform cloud-side thermal runaway warning verification on the edge and cloud operation results.

[0128] The cloud-based thermal runaway warning verification validity signal includes a cloud-based pressure and battery temperature feature verification validity signal, a cloud-based pressure and insulation feature verification validity signal, and a cloud-based pressure and cell voltage feature verification validity signal.

[0129] Step 7: The thermal runaway warning module receives pressure data from built-in and external pressure sensors, battery data, thermal runaway feature verification validity signals, and cloud-based thermal runaway warning verification validity signals to determine whether there is a thermal runaway risk and perform corresponding warning processing and prompts.

[0130] The specific method is as follows:

[0131] (1) If any pressure and battery temperature feature verification validity signal is set to 1 and any battery temperature is greater than the thermal runaway warning temperature threshold, the thermal runaway warning is triggered; otherwise, the thermal runaway warning is not triggered;

[0132] (2) If any pressure and insulation feature verification validity signal is set to 1 and any battery insulation resistance is lower than the thermal runaway warning insulation resistance threshold, the thermal runaway warning is triggered; otherwise, the thermal runaway warning is not triggered;

[0133] (3) If any pressure and cell voltage feature verification validity signal is set to 1, and any battery cell voltage is lower than the thermal runaway warning cell voltage threshold, the thermal runaway warning is triggered; otherwise, the thermal runaway warning is not triggered;

[0134] Any of the conditions (1)-(3) triggers a thermal runaway warning, and timely thermal runaway warning protection measures are implemented, and a thermal runaway warning prompt is given to the user on the system display device.

[0135] Example 2

[0136] In an exemplary embodiment, a battery thermal runaway warning verification device is also provided, such as Figure 4-Figure 5 As shown, the device includes:

[0137] Sensor diagnostic module, used to diagnose dual sensor drive, sensor reverse wake-up signal, sensor power supply, sensor communication, and sensor sampling;

[0138] Sensor calibration module, used to calibrate pressure value and pressure change rate;

[0139] Abnormal wake-up verification module, used for pressure storage before wake-up and pressure verification before and after wake-up;

[0140] Battery data acquisition, calculation, and diagnosis module, used to collect and calculate battery cell voltage, battery temperature, and battery insulation resistance, and diagnose sampling faults;

[0141] The cloud-edge collaborative thermal runaway warning verification module is used to interact with cloud-edge data and verify thermal runaway warnings;

[0142] The "cloud" in the cloud-edge collaborative thermal runaway warning verification module refers to the cloud end, and the "edge" in the cloud-edge collaborative thermal runaway warning verification module refers to the edge; the edge includes but is not limited to vehicles, battery systems, battery management systems, battery monitoring equipment and other application equipment.

[0143] The edge thermal runaway warning verification function includes dual sensor verification, thermal runaway feature verification, and thermal runaway warning.

[0144] The cloud-based thermal runaway warning verification function includes cloud-edge data interaction, dual sensor verification, and thermal runaway feature verification.

[0145] Thermal runaway warning feature verification module, used to identify thermal runaway warnings, process thermal runaway warnings, and issue prompts for thermal runaway warnings;

[0146] The thermal runaway warning module is used to identify thermal runaway warnings, perform early warning processing on thermal runaways, and provide early warning prompts on thermal runaways.

[0147] Example 3

[0148] Figure 6 This is a block diagram of a terminal provided in an embodiment of the present application. This terminal may be the terminal in the above-mentioned embodiment. The terminal 300 may be a portable mobile terminal, such as a smartphone or tablet computer. The terminal 300 may also be referred to as a user equipment, a portable terminal, or other similar terminology.

[0149] Typically, the terminal 300 includes a processor 301 and a memory 302 .

[0150] The processor 301 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 301 may be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), or PLA (Programmable Logic Array). The processor 301 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor 301 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 301 may also include an AI (Artificial Intelligence) processor, which is used to process computing operations related to machine learning.

[0151] Memory 302 may include one or more computer-readable storage media, which may be tangible and non-transitory. Memory 302 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory storage devices. In some embodiments, the non-transitory computer-readable storage medium in memory 302 is used to store at least one instruction, which is executed by processor 301 to implement a battery thermal runaway warning verification method provided in this application.

[0152] In some embodiments, the terminal 300 may further include a peripheral device interface 303 and at least one peripheral device. Specifically, the peripheral device includes at least one of a radio frequency circuit 304 , a touch screen 305 , a camera 306 , an audio circuit 307 , a positioning component 308 , and a power supply 309 .

[0153] The peripheral device interface 303 can be used to connect at least one I / O (Input / Output)-related peripheral device to the processor 301 and the memory 302. In some embodiments, the processor 301, the memory 302, and the peripheral device interface 303 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 301, the memory 302, and the peripheral device interface 303 can be implemented on separate chips or circuit boards, which is not limited in this embodiment.

[0154] The RF circuit 304 is used to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The RF circuit 304 communicates with communication networks and other communication devices via electromagnetic signals. The RF circuit 304 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals into electrical signals. Optionally, the RF circuit 304 includes an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a user identity module card, and the like. The RF circuit 304 can communicate with other terminals via at least one wireless communication protocol. Such wireless communication protocols include, but are not limited to, the World Wide Web, metropolitan area networks, intranets, various generations of mobile communication networks (2G, 3G, 4G, and 5G), wireless local area networks, and / or WiFi (Wireless Fidelity) networks. In some embodiments, the RF circuit 304 may also include circuits related to Near Field Communication (NFC), which is not limited in this application.

[0155] The touchscreen display 305 is used to display a user interface (UI). This UI can include graphics, text, icons, videos, or any combination thereof. The touchscreen display 305 is also capable of collecting touch signals on or above the surface of the touchscreen display 305. These touch signals can be input as control signals to the processor 301 for processing. The touchscreen display 305 is used to provide virtual buttons and / or a virtual keyboard, also known as soft buttons and / or a soft keyboard. In some embodiments, there can be a single touchscreen display 305, located on the front panel of the terminal 300. In other embodiments, there can be at least two touchscreen displays 305, located on different surfaces of the terminal 300 or in a foldable design. In still other embodiments, the touchscreen display 305 can be a flexible display, located on a curved or foldable surface of the terminal 300. Furthermore, the touchscreen display 305 can be configured as a non-rectangular, irregular shape, also known as a special-shaped screen. The touchscreen display 305 can be made of materials such as LCD (Liquid Crystal Display) and OLED (Organic Light-Emitting Diode).

[0156] The camera assembly 306 is used to capture images or videos. Optionally, the camera assembly 306 includes a front camera and a rear camera. Typically, the front camera is used to enable video calls or selfies, and the rear camera is used to enable photo or video shooting. In some embodiments, there are at least two rear cameras, which are any one of a main camera, a depth of field camera, and a wide-angle camera, so as to realize the fusion of the main camera and the depth of field camera to realize the background blur function, and the fusion of the main camera and the wide-angle camera to realize panoramic shooting and VR (Virtual Reality) shooting function. In some embodiments, the camera assembly 306 may also include a flash. The flash can be a single-color temperature flash or a dual-color temperature flash. A dual-color temperature flash refers to a combination of a warm light flash and a cold light flash, which can be used for light compensation at different color temperatures.

[0157] The audio circuit 307 is used to provide an audio interface between the user and the terminal 300. The audio circuit 307 may include a microphone and a speaker. The microphone is used to collect sound waves from the user and the environment, and convert the sound waves into electrical signals that are input into the processor 301 for processing, or input into the radio frequency circuit 304 to achieve voice communication. For the purpose of stereo sound collection or noise reduction, there may be multiple microphones, each located in different parts of the terminal 300. The microphone may also be an array microphone or an omnidirectional collection microphone. The speaker is used to convert electrical signals from the processor 301 or the radio frequency circuit 304 into sound waves. The speaker may be a traditional thin film speaker or a piezoelectric ceramic speaker. When the speaker is a piezoelectric ceramic speaker, it can not only convert electrical signals into sound waves audible to humans, but also convert electrical signals into sound waves inaudible to humans for purposes such as distance measurement. In some embodiments, the audio circuit 307 may also include a headphone jack.

[0158] The positioning component 308 is used to locate the current geographic location of the terminal 300 to implement navigation or LBS (Location Based Service). The positioning component 308 can be a positioning component based on the US GPS (Global Positioning System), China's Beidou system, or Russia's Galileo system.

[0159] Power supply 309 is used to power various components in terminal 300. Power supply 309 can be AC ​​power, DC power, a disposable battery, or a rechargeable battery. When power supply 309 includes a rechargeable battery, the rechargeable battery can be a wired rechargeable battery or a wireless rechargeable battery. A wired rechargeable battery is charged via a wired line, while a wireless rechargeable battery is charged via a wireless coil. The rechargeable battery can also support fast charging technology.

[0160] Those skilled in the art will understand that Figure 6 The structure shown in the figure does not constitute a limitation on the terminal 300, and the terminal 300 may include more or fewer components than shown in the figure, or combine certain components, or adopt a different component arrangement.

[0161] Example 4

[0162] In an exemplary embodiment, a computer-readable storage medium is further provided, on which a computer program is stored. When the program is executed by a processor, a battery thermal runaway warning verification method provided in all the inventive embodiments of this application is implemented.

[0163] Any combination of one or more computer-readable media can be used. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or component, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, device or device.

[0164] A computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, which carries computer-readable program code. Such a propagated data signal may take a variety of forms, including, but not limited to, electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0165] Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0166] Computer program code for performing the operations of the present invention may be written in one or more programming languages, or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0167] Example 5

[0168] In an exemplary embodiment, an application product is further provided, comprising one or more instructions, which can be executed by the processor 301 of the above-mentioned device to complete the above-mentioned battery thermal runaway early warning verification method.

[0169] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and example embodiments. They can be applied to a variety of fields suitable for the present invention. Further modifications will be readily apparent to those skilled in the art. Therefore, the present invention is not limited to the specific details and illustrations shown and described herein without departing from the general concept defined by the claims and their equivalents.

Claims

1. A battery thermal runaway warning verification method, characterized in that: include: Step 1: Collect data from the built-in pressure sensor and the external pressure sensor, and diagnose whether the built-in pressure sensor and the external pressure sensor have any faults; Step 2: If any of the built-in pressure sensor data and the external pressure sensor fails, no pressure calibration is performed, and the output pressure sensor calibration limited signal value is 0 and sent to the thermal runaway warning feature calibration module. If both the built-in pressure sensor data and the external pressure sensor data are normal, the output pressure calibration validity signal value is sent to the thermal runaway warning feature calibration module after calibration, and the working mode of the battery system is determined; when the battery system is in the pressure abnormality wake-up start mode, step 3 is executed; when the battery system is in the normal power-on start mode, step 4 is executed; Step 3: When the battery system is in the abnormal pressure wake-up start mode, the pressure state is detected in real time. If the pressure change exceeds the stored predetermined pressure threshold, the battery system is reversely awakened to enter the normal power-on start mode, and the pressure value stored Δt time before the reverse wake-up is verified with the real-time detected pressure value; Step 4: When the battery system is in normal power-on startup mode, collect and calculate battery data; the collected and calculated battery data includes all battery cell voltages, battery temperatures, and battery insulation resistances. The collected and calculated battery data and detection hardware are diagnosed, and the battery data and fault signals are output to the thermal runaway warning feature verification module and the cloud-edge collaborative thermal runaway warning verification module. Step 5: When the thermal runaway warning feature verification module receives a 0 value from any pressure sensor verification limited signal, it does not perform verification of pressure and other thermal runaway features; otherwise, it performs verification; if any battery data sampling failure is received, it does not perform pressure verification; otherwise, it performs verification; Step 6: The cloud-based thermal runaway warning feature verification module uses the battery data uploaded by the edge, the pressure data of the built-in pressure sensor, and the pressure data of the external pressure sensor to synchronously run the thermal runaway warning verification on the cloud; Step 7: The thermal runaway warning module receives pressure data from built-in and external pressure sensors, battery data, thermal runaway feature verification validity signals, and cloud-based thermal runaway warning verification validity signals to determine whether there is a thermal runaway risk and perform corresponding warning processing and prompts.

2. A battery thermal runaway early warning verification method according to claim 1, characterized in that: The step 1 of diagnosing whether the built-in pressure sensor and the external pressure sensor are faulty includes: (1) Check whether the power supply of the built-in pressure sensor and the external pressure sensor has abnormal power supply faults. If there are no faults, perform the diagnosis of (2), (3), (4), and (5). If there are faults, output the pressure sensor power supply fault to the sensor diagnosis and verification module; (2) Detect whether the drive of the built-in pressure sensor and the external pressure sensor has abnormal drive failure. If there is no failure, perform diagnosis (3), (4), and (5). If there is a failure, output the pressure sensor drive failure to the sensor diagnosis and verification module; (3) Detect whether the reverse wake-up signals of the built-in pressure sensor and the external pressure sensor have abnormal wake-up signal faults. If there are no faults, perform the diagnosis of (4) and (5). If there are faults, output the pressure sensor reverse wake-up signal fault to the sensor diagnosis and verification module; (4) Detect whether there is any abnormal communication fault between the built-in pressure sensor and the external pressure sensor. If there is no fault, perform the diagnosis of (5). If there is a fault, output the abnormal communication fault of the pressure sensor to the sensor diagnosis and verification module; (5) Detect the pressure sensor sampling and diagnose whether it has abnormal sampling fault. If there is no fault, return to (4) for diagnosis. If there is no fault, return to (4) for diagnosis. If there is a fault, output the pressure sensor sampling fault to the sensor diagnosis and verification module.

3. A battery thermal runaway warning verification method according to claim 1, characterized in that: The specific method of verification in step 2 is as follows: If ΔP>P check Duration t1, or ΔP t >P tcheck If the duration is t2, the output pressure verification validity signal value is 0 and sent to the thermal runaway warning feature verification module; otherwise, the output pressure verification validity signal value is 1 and sent to the thermal runaway warning feature verification module; Wherein, ΔP=|P1-P2|, P1 is the pressure value collected by the built-in pressure sensor, and P2 is the pressure value collected by the external pressure sensor; ΔP t =|dP1 / dt-dP2 / dt|, dP1 / dt is the pressure change rate collected by the built-in pressure sensor, and dP2 / dt is the pressure change rate collected by the external pressure sensor; P check is the pressure difference calibration threshold, P tcheck It is the pressure change rate verification threshold, and the value range of t1 and t2 is 1-3 seconds.

4. A battery thermal runaway warning verification method according to claim 1, characterized in that: The specific method of verification in step 3 is as follows: If P1-P b1 >P check or P2P b2 >P check If established, the output pressure wake-up verification validity signal value is 1 and sent to the thermal runaway warning feature verification module; Otherwise, the output pressure wake-up verification validity signal value is 0 and sent to the thermal runaway warning feature verification module; Among them, P1 is the pressure value collected by the built-in pressure sensor, and P2 is the pressure value collected by the external pressure sensor.

5. The battery thermal runaway warning verification method according to claim 1, characterized in that: The specific method of verification in step 5 is as follows: The conditions for calibrating pressure and battery temperature changes are as follows: (1)ΔP1>P fault or ΔP2>P fault or ΔP t1 >P tfault or ΔP t2 >P tfault Established; Among them, ΔP1 is the pressure value change of each sampling cycle of the built-in pressure sensor, ΔP t1 is the pressure value change rate of the built-in pressure sensor, ΔP2 is the pressure value change per sampling cycle of the external pressure sensor, ΔP t2 is the rate of change of the pressure value of the external pressure sensor, P fault is the pressure difference threshold for verification with other characteristic signals, P tfault It is the pressure change rate threshold value for verification with other characteristic signals; (2) Any ΔT battn >T fault Established; Where ΔT battn is the rate of change of each temperature, T fault is the temperature change rate threshold for pressure calibration; If conditions (1) and (2) occur within a fixed time window Δt judge The output pressure and battery temperature characteristic verification validity signal is sent to the thermal runaway warning module; when any condition is met, the time window starts counting. If another condition is not met within the fixed time window, the timer is reset to zero and the timer will be restarted when any condition is met again. The conditions for pressure and insulation change testing are as follows: (1)ΔP1>P fault or ΔP2>P fault or ΔP t1 >P tfault or ΔP t2 >P tfault Established; Among them, ΔP1 is the pressure value change of each sampling period of the built-in pressure sensor, P fault is the pressure difference threshold for verification with other characteristic signals, ΔP2 is the pressure value change of each sampling cycle of the external pressure sensor, ΔP t1 is the pressure value change rate of the built-in pressure sensor, P tfault It is the pressure change rate threshold value for verification with other characteristic signals; (2)ΔR1>R fault or ΔR2>R fault Established; Among them, R fault It is the insulation change threshold for pressure calibration, ΔR1 and ΔR2 are the insulation resistance changes between the positive electrode and the ground and the negative electrode and the ground; If conditions (1) and (2) occur within a fixed time window Δt judge The output pressure and insulation characteristic verification validity signal is sent to the thermal runaway warning module; when any condition is met, the time window starts counting. If another condition is not met within the fixed time window, the timer is reset to zero and the timer will be restarted when any condition is met again. The conditions for pressure and voltage change calibration are as follows: (1)ΔP1>P fault or ΔP2>P fault or ΔP t1 >P tfault or ΔP t2 >P tfault Established; Among them, ΔP1 is the pressure value change of each sampling period of the built-in pressure sensor, P fault is the pressure difference threshold for verification with other characteristic signals, ΔP2 is the pressure value change of each sampling cycle of the external pressure sensor, ΔP t1 is the pressure value change rate of the built-in pressure sensor, P tfault It is the pressure change rate threshold value for verification with other characteristic signals; (2) Any ΔV battn >V fault Established; Where, if conditions (1) and (2) occur within a fixed time window Δt judge The output pressure and cell voltage characteristic verification validity signal is sent to the thermal runaway warning module; when any condition is met, the time window starts to count. If another condition is not met within the fixed time window, the timer is reset to zero and the timer is restarted when any condition is met again; Δt judge The time value range can be adjusted according to the changes in thermal runaway characteristics of different batteries.

6. A battery thermal runaway early warning verification method according to claim 1, characterized in that: The specific method of step six is ​​as follows: Use the same sensor diagnosis and verification module and thermal runaway warning feature verification module as the edge to perform cloud-based thermal runaway warning verification on the edge and cloud operation results; the validity signals of the cloud-based thermal runaway warning verification include the cloud-based pressure and battery temperature feature verification validity signal, the cloud-based pressure and insulation feature verification validity signal, and the cloud-based pressure and single cell voltage feature verification validity signal.

7. The battery thermal runaway warning verification method according to claim 1, characterized in that: The specific method of step seven is as follows: (1) If any pressure and battery temperature feature verification validity signal is set to 1 and any battery temperature is greater than the thermal runaway warning temperature threshold, the thermal runaway warning is triggered; otherwise, the thermal runaway warning is not triggered; (2) If any pressure and insulation feature verification validity signal is set to 1 and any battery insulation resistance is lower than the thermal runaway warning insulation resistance threshold, the thermal runaway warning is triggered; otherwise, the thermal runaway warning is not triggered; (3) If any pressure and cell voltage feature verification validity signal is set to 1, and any battery cell voltage is lower than the thermal runaway warning cell voltage threshold, the thermal runaway warning is triggered; otherwise, the thermal runaway warning is not triggered; Any of the conditions (1)-(3) triggers a thermal runaway warning, and timely thermal runaway warning protection measures are implemented, and a thermal runaway warning prompt is given to the user on the system display device.

8. A battery thermal runaway warning verification device, characterized in that: include: Sensor diagnostic module, used to diagnose dual sensor drive, sensor reverse wake-up signal, sensor power supply, sensor communication, and sensor sampling; Sensor calibration module, used to calibrate pressure value and pressure change rate; Abnormal wake-up verification module, used for pressure storage before wake-up and pressure verification before and after wake-up; Battery data acquisition, calculation, and diagnosis module, used to collect and calculate battery cell voltage, battery temperature, and battery insulation resistance, and diagnose sampling faults; The cloud-edge collaborative thermal runaway warning verification module is used to interact with cloud-edge data and verify thermal runaway warnings; Thermal runaway warning feature verification module, used to identify thermal runaway warnings, process thermal runaway warnings, and issue prompts for thermal runaway warnings; The thermal runaway warning module is used to identify thermal runaway warnings, perform early warning processing on thermal runaways, and provide early warning prompts on thermal runaways.

9. A terminal, characterized in that: include: one or more processors; a memory for storing the one or more processor-executable instructions; The one or more processors are configured to: Execute the battery thermal runaway warning verification method according to any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium, characterized in that When the instructions in the storage medium are executed by a processor of a terminal, the terminal is enabled to execute a battery thermal runaway early warning verification method according to any one of claims 1 to 7.

Images