Battery and its thermal runaway early warning method, device and storage medium

Abstract

This application relates to the field of batteries and provides a method, device, and storage medium for a battery and its thermal runaway early warning. The battery is provided with a storage space used to vent smoke in the event of thermal runaway in the battery cells. The method includes acquiring a detection signal from a detection location including the storage space and generating a thermal runaway early warning signal based on the detection signal. By installing a sensor for acquiring the detection signal in the storage space, when the battery vents smoke through the storage space, the temperature or gas pressure of the partition increases. The sensor installed in the storage space can accurately and effectively detect the change in the battery temperature or gas pressure, thereby generating a thermal runaway early warning signal in real time. This provides users with a longer response time and reduces losses caused by thermal runaway in the battery.

Description

[Technical Field]

[0001] The present application relates to the field of batteries, and more particularly to a method, an apparatus and a storage medium for early warning of a battery and its thermal runaway. [Background technology]

[0002] Energy and environmental issues are serious challenges facing humanity, and establishing a clean, renewable, new energy system has become an inevitable choice for human society. With the advancement of energy storage technology, battery energy density has improved, but at the same time, potential chemical instability has also emerged. Thermal runaway in batteries can lead to serious safety incidents, such as spontaneous combustion in automobiles and fires in energy storage substations. How to ensure battery safety and how to obtain early information on battery thermal runaway are both hot topics and challenging issues.

[0003] A battery pack pressure monitoring sensor can be installed inside a battery pack to obtain real-time information about battery thermal runaway and ensure that relevant personnel have time to safely evacuate. The battery pack pressure monitoring sensor can detect changes in the gas pressure inside the battery pack, allowing for early detection of battery thermal runaway. However, if the battery pack is designed with the explosion-proof valve facing downward, the battery pack pressure monitoring sensor inside the battery pack cannot detect battery thermal runaway in real time, which is disadvantageous in reducing losses after battery thermal runaway. Summary of the Invention

[0004] In view of this, the embodiments of the present application provide a method, apparatus, device and storage medium for a battery and its thermal runaway early warning, which solves the problem that in the prior art, a battery pack pressure monitoring sensor in a battery pack cannot detect battery thermal runaway in real time, which is disadvantageous in reducing losses after battery thermal runaway.

[0005] A first aspect of an embodiment of the present application provides a method for early warning of thermal runaway in a battery, wherein the battery is provided with a storage space used to discharge smoke when a cell of the battery experiences thermal runaway, and the method includes: obtaining a detection signal at a detection position including the storage space; and generating an early warning signal of thermal runaway based on the detection signal, thereby more reliably generating an early warning signal of thermal runaway based on the detection signal from the storage space discharging smoke, thereby reducing the probability of missed early warnings and reducing losses after thermal runaway.

[0006] By installing a sensor in the storage space to obtain a detection signal, when the battery discharges smoke through the storage space, the temperature or gas pressure of the partition layer increases. The sensor installed in the storage space can effectively detect the change signal of the battery's temperature or gas pressure in real time. If the detected detection signal, such as temperature or gas pressure, meets a preset early warning condition, an early warning signal of thermal runaway can be generated based on the detection signal. For example, an audio warning signal, a warning light display signal, a text early warning signal, an image early warning signal, etc. can be generated. This allows the battery user, such as a car driver, more time to respond, such as getting out of the vehicle and leaving the accident scene, and effectively reduces losses due to battery thermal runaway.

[0007] According to the first aspect, in a first possible mode of the first aspect, the accommodation space includes one or more of a partition layer space of the battery and an internal space of a hollow beam structure of the battery.

[0008] The storage space is a space for storing smoke emitted from the battery, and the space may include a partition layer space formed by being partitioned by a partition layer structure, and the partition layer space may be the partition layer space of a battery module or the partition layer space of a battery pack. In a possible embodiment, the storage space may include the internal space of a hollow beam structure in a battery. The hollow beam structure may be installed within a battery module or a battery pack. For example, the partition layer as the storage space may be installed at the end of a battery module or a battery pack, including a partition layer installed at the bottom, top, or side of the battery module or battery pack. Alternatively, the partition layer may be installed in an intermediate layer of the battery module or battery pack. When the storage space is a hollow beam structure, the hollow beam structure may be installed at the end of the battery module or battery pack, including the bottom, top, or side, or may be installed in a space a predetermined distance from the end of the battery module or battery pack. An injection valve may be installed in the installed storage space, and smoke from the cells enters the storage space through the injection valve. When the smoke concentration in the storage space reaches a certain level, the explosion-proof valve in the storage space is opened and the smoke is discharged through the explosion-proof valve.

[0009] According to a first feasible form of the first aspect, in a second feasible form of the first aspect, when the storage space includes a partition layer space of the battery, the detection position includes any position within the partition layer space and / or an inner layer surface of the partition layer space.

[0010] To better detect abnormal battery conditions through the partition space, a sensor for detecting signals can be installed at any position within the partition space or on the inner surface of the partition space. When a smoke signal from a cell enters the partition space through the injection valve, the sensor located within the partition space can obtain detection signals, including temperature signals, gas pressure signals, etc. In a possible embodiment, when the partition space is located at an end or side of a battery module or battery pack, the detection position can be located on the inner surface of the partition space, including the inner and outer surfaces of the inner surface. By obtaining detection signals, including temperature signals, gas pressure signals, etc., through the inner surface of the partition space, abnormal battery conditions can be detected in real time.

[0011] According to any one of the first aspect to the second feasible form of the first aspect, in a third feasible form of the first aspect, the detection signal includes a first signal and a second signal, and acquiring the detection signal of the detection position including the storage space includes acquiring a first signal of the detection position including the storage space, and when the first signal satisfies a predetermined wake-up condition, waking up a battery management system and acquiring a second signal by the battery management system, and a sampling frequency of the second signal is higher than a sampling frequency of the first signal.

[0012] To reduce system power consumption, the detection signal can be configured to include a first signal and a second signal, and the detection location of the first signal and the second signal can include the storage space. The first signal is acquired when the system is in a sleep state. The first signal is compared with a preset wake-up condition. If the first signal meets the wake-up condition, the battery management system is woken up to enter a normal operating mode and collects a second signal at the detection location, including the storage space. In the normal operating mode, the second signal is sampled at a higher sampling frequency than the first signal. The second signal is used for thermal runaway early warning analysis, resulting in more reliable early warning results. If the first signal does not meet the wake-up condition, the battery management system enters a low-power sleep state, which is beneficial to reducing system power consumption and improving the battery management system's operating life.

[0013] According to a third possible form of the first aspect, in a fourth possible form of the first aspect, the first signal includes one or more of a temperature signal and a gas pressure signal, the detection position of which is located in the storage space.

[0014] This is because, when a battery cell experiences thermal runaway, the emitted smoke enters the storage space. Therefore, when the battery experiences thermal runaway, smoke enters the storage space, increasing the gas pressure and temperature within the storage space. A temperature sensor and / or a gas pressure sensor can be installed within the storage space, including within the partition layer space or the hollow beam structure, to detect the gas pressure and / or temperature signals within the storage space. In a possible embodiment, when a cell generates smoke, the inner surface of the partition layer space installed at the end or side is affected by the smoke and its temperature rises. A detection signal can be obtained through the inner surface of the partition layer space, allowing for rapid and effective detection of an abnormal state of the battery.

[0015] According to a third possible form of the first aspect, in a fifth possible form of the first aspect, the first signal further includes one or more of a battery voltage, a temperature of a balancing circuit board of the battery, and a temperature of a cell of the battery.

[0016] The battery voltage may include the voltage of a battery module or a battery pack. A battery pack may include multiple battery modules connected in series, and a battery module may include multiple cells connected in series. The output voltage of a battery module is the sum of the voltages of the series-connected cells, and the output voltage of a battery pack is the sum of the voltages of the series-connected battery modules. If the voltage of one or more of the cells drops, the output voltage of the battery module drops, and the voltage of the battery pack, which has battery modules connected in series, also drops. Therefore, by detecting the output voltage of a battery module or a battery pack, an abnormal battery state can be detected in real time. Furthermore, if a battery enters a thermal runaway state, abnormalities may also occur in the temperature of the battery's balancing circuit board and the temperature of the battery cells. By combining the temperature detection of the cells and the balancing circuit board, the detection accuracy can be effectively improved.

[0017] According to a third feasible mode of the first aspect, in a sixth feasible mode of the first aspect, the second signal includes two or more of a temperature signal of the accommodating space, a gas pressure signal of the accommodating space, a temperature change rate of the accommodating space, a gas pressure change rate of the accommodating space, a cell voltage of the battery, a temperature of the battery cells, a temperature change rate of the battery cells, a temperature of the battery balancing circuit board, and a temperature change rate of the battery balancing circuit board.

[0018] When the battery is in a thermal runaway state and emits a smoke signal, changes occur in the temperature of the storage space, the gas pressure of the storage space, the temperature of the balancing circuit board, and the temperature of the cells. By detecting the temperature of the storage space, the gas pressure of the storage space, the temperature of the balancing circuit board, and the temperature of the cells, it can be determined whether the currently collected second signal indicates that the battery is in a thermal runaway state. Furthermore, status indicators such as the temperature change rate of the storage space, the gas pressure change rate of the storage space, the temperature change rate of the battery cells, and the temperature change rate of the battery balancing circuit board can be used to determine the rate of change of the battery's abnormal state. If the rate of change of the abnormal state is fast, the battery's thermal runaway state can be detected in real time and effectively.

[0019] According to a sixth possible form of the first aspect, in a seventh possible form of the first aspect, generating a thermal runaway early warning signal based on the detection signals includes generating a thermal runaway early warning signal if two or more of the second signals satisfy a predetermined early warning requirement.

[0020] To improve the accuracy of detecting a thermal runaway state of a battery, a thermal runaway early warning signal can be generated when at least two of the second signals are abnormal. By configuring detection and judgment using two or more indicators in combination, the probability of a false alarm occurring due to inaccuracy of individual signals can be reduced. For example, if there is a possibility that a noise signal is present in the temperature signal detected by the temperature sensor, the detected cell temperature may meet the criteria for determining thermal runaway. By combining the second signal with other indicators for judgment, an early warning can be temporarily not issued if all other indicators are normal, thereby effectively reducing the probability of false detection and improving the accuracy of detecting a thermal runaway state of a battery.

[0021] According to the third feasible form of the first aspect to the seventh feasible form of the first aspect, in an eighth feasible form of the first aspect, acquiring a detection signal of a detection position including the storage space includes monitoring the first signal by a monitor having a host wake-up function, and when the first signal satisfies a preset wake-up condition, waking up the sleep mode of the battery management system by the monitor to enter a normal operation mode, and acquiring the second signal in the normal operation mode by the battery management system.

[0022] The monitor may include two operating modes: a sleep mode and a normal operating mode. In the sleep mode, the monitor can collect two different status signals: a heartbeat signal and a fault tone signal. The heartbeat signal is a signal when the battery is operating normally, and the fault tone signal is a signal when the battery is in an abnormal state. When the monitor monitors the fault tone signal, it can trigger a pin level change, for example, triggering the pin to a high level state. The change in the pin level triggers the battery management system to enter a normal operating mode from a low-power sleep mode and collect a second signal in the normal operating mode. When the battery is in a normal state, the monitor and battery management system may be in sleep mode.

[0023] According to the third feasible mode of the first aspect to the seventh feasible mode of the first aspect, in a ninth feasible mode of the first aspect, acquiring a detection signal at a detection position including the accommodating space includes sampling the first signal in a low power consumption mode by a sampling controller, and when the first signal satisfies a preset wake-up condition, waking up the battery management system by the sampling controller to enter a normal operation mode, and switching the sampling controller from the low power consumption mode to the normal operation mode, and controlling the battery management system to cause the sampling controller to acquire the second signal in the normal operation mode.

[0024] If the sampling device does not support reverse wakeup of the battery management system, the sampling controller can acquire a first signal sampled in low power consumption mode. If the first signal meets a preset wakeup condition, the sampling controller wakes up the battery management system and enters normal operation mode. The sampling controller switches from low power consumption mode to normal operation mode, and the battery management system controls the sampling controller to acquire a signal in normal operation mode and acquire a second signal. The sampling frequency of the second signal acquired in normal operation mode is higher than the sampling frequency of the first signal acquired in sleep mode, resulting in a more accurate and real-time sampled signal, improving the accuracy and immediacy of data detection and judgment.

[0025] According to the third feasible mode of the first aspect to the seventh feasible mode of the first aspect, in a tenth feasible mode of the first aspect, acquiring a detection signal at a detection position including the accommodating space includes comparing the first signal with a preset threshold signal, and if the comparison result satisfies a preset wake-up condition, triggering a battery management system to enter a normal operation mode from a sleep mode, and controlling a sampling device by the battery management system to acquire the second signal in the normal operation mode.

[0026] To reduce system costs, a comparator can trigger the battery management system to switch from sleep mode to operating mode. The input terminal of the comparator receives a reference signal and a detection signal, and can cause the comparator to output different signals based on the comparison result between the detection signal and the reference signal. The battery management system controls the switching of the battery management system state based on the different signals output by the comparator. For example, if the detection signal indicates that the battery is in a normal state, the comparator outputs a control signal to put the battery management system into sleep mode. If the detection signal indicates that the battery is in an abnormal state, the comparator outputs a control signal to put the battery management system into normal operating mode, thereby allowing the second signal to be collected at a high sampling frequency.

[0027] According to the third feasible mode of the first aspect to the seventh feasible mode of the first aspect, in an eleventh feasible mode of the first aspect, when the cells of the battery are in a parallel connection structure, the first signal includes a gas pressure signal and / or a temperature signal, and the collection position of the gas pressure signal and / or the temperature signal includes the accommodating space.

[0028] When cells in a battery module are connected in parallel, or when battery modules in a battery pack are connected in parallel, and an abnormality occurs in one associated cell, the effect on the detected voltage is very small, making it difficult to determine whether the battery is in a thermal runaway state based on the detected voltage. In this case, to improve the accuracy of the detection, the detection location of the first signal may include a detection signal of the accommodating space, including a gas pressure signal and / or a temperature signal of the accommodating space. The gas pressure signal and / or temperature signal collected in the accommodating space improves the accuracy of the detection result of the thermal runaway state of the battery.

[0029] A second aspect of an embodiment of the present application provides a thermal runaway early warning device for a battery, wherein the battery is provided with a storage space used to discharge smoke when a cell of the battery experiences thermal runaway, and the device includes: a detection signal acquisition unit used to acquire a detection signal of a detection position including the storage space; and an early warning unit used to generate a thermal runaway early warning signal based on the detection signal.

[0030] A third aspect of the present application provides a battery comprising a memory, a processor and a computer program stored in the memory and executed by the processor, the computer program executing the steps of the method of any one of the first aspects.

[0031] A fourth aspect of an embodiment of the present application provides a computer-readable storage medium having stored thereon a computer program that, when executed by a processor, implements the steps of the method of any one of the first aspects.

[0032] Note that for the beneficial effects of the second to fourth aspects, the relevant explanation of the first aspect can be referred to, and the explanation here will be omitted. [Brief explanation of the drawings]

[0033] In order to more clearly describe the technical solutions in the embodiments of the present application, the following briefly describes the drawings necessary for describing the embodiments or prior art. The drawings shown below are only some embodiments of the present application, and it is obvious that a person skilled in the art can obtain other drawings based on these drawings without any creative efforts.

[0034] [Figure 1] FIG. 2 is a schematic top view of a temperature sensor disposed on a partition layer according to an embodiment of the present application. [Figure 2] 1 is a schematic side view of a temperature sensor according to an embodiment of the present invention disposed on a partition layer. [Figure 3]FIG. 10 is another schematic side view of a temperature sensor disposed on a partition layer according to an embodiment of the present application. [Figure 4] 1 is a circuit diagram of an embodiment of the present invention for early warning of thermal runaway of a battery; [Figure 5] 1 is a schematic diagram illustrating the implementation flow of a method for early warning of thermal runaway in a battery according to an embodiment of the present application; [Figure 6] FIG. 2 is another circuit structure schematic diagram of a battery thermal runaway early warning system according to an embodiment of the present application; [Figure 7] FIG. 1 is a schematic flow diagram illustrating another implementation of a method for early warning of thermal runaway in a battery according to an embodiment of the present application; [Figure 8] FIG. 2 is another circuit structure schematic diagram of a battery thermal runaway early warning system according to an embodiment of the present application; [Figure 9] FIG. 1 is a schematic flow diagram illustrating another implementation of a method for early warning of thermal runaway in a battery according to an embodiment of the present application; [Figure 10] FIG. 2 is another circuit structure schematic diagram of a battery thermal runaway early warning system according to an embodiment of the present application; [Figure 11] FIG. 1 is a schematic flow diagram illustrating another implementation of a method for early warning of thermal runaway in a battery according to an embodiment of the present application; [Figure 12] 1 is a schematic diagram of a battery thermal runaway early warning device according to an embodiment of the present application; [Figure 13] 1 is a structural schematic diagram of a battery according to an embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0035] In the following description, for purposes of explanation and not limitation, details of specific system architectures, techniques, etc. are set forth to facilitate understanding of the embodiments of the present application. However, as will be understood by those skilled in the art, the present application can be implemented in other embodiments without the specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

[0036] To illustrate the technical solutions described in this application, specific examples are provided below.

[0037] To ensure the safety of batteries and improve the accuracy of detecting battery thermal runaway, battery thermal runaway monitoring is necessary. For example, a battery pack pressure monitoring sensor is installed in a battery pack to detect changes in gas pressure within the battery pack. With technological advances, in order to increase energy density in a limited space, the explosion-proof valves of battery cells are generally installed facing downward, so that when a cell experiences thermal runaway, smoke will be emitted from the bottom injection valve. In this case, the pressure monitoring sensor or smoke sensor installed in the battery module or battery pack may not be able to detect the abnormality, which is disadvantageous for detecting battery thermal runaway in real time and for reducing losses after battery thermal runaway.

[0038] To solve the above problems, an embodiment of the present application provides a method for early warning of battery thermal runaway, which can provide real-time and effective early warning of battery thermal runaway, thereby reducing losses caused by battery thermal runaway.

[0039] In the embodiments of the present application, the first sensor for detecting a thermal runaway early warning may include one or more of a temperature sensor, a gas pressure sensor, or a voltage sensor. The storage space in the embodiments of the present application may include a partition layer space at the end or side of a battery module or battery pack, or the internal space of a hollow beam structure within a battery module or battery pack. FIG. 1 is a top view schematic diagram of a temperature sensor in the partition layer space according to the embodiments of the present application. As shown in FIG. 1, multiple temperature sensors, designated R1, R2, R3, and R4, are installed in the partition layer space at the bottom of battery 1. The temperature sensors transmit the collected temperature signals to a battery management system. The battery management system is not limited to conventional battery management systems and may include a vehicle controller or motor controller integrating battery management system functions. FIG. 1 illustrates only four temperature sensors. Depending on the detection accuracy requirements, more or fewer temperature sensors may be installed. The temperature sensors may be thermistors. The temperature at the thermistor can be determined by looking up a table based on the resistance value of the thermistor. The obtained temperature can be used to wake up the battery management system, or after waking up the battery management system, to determine whether to generate an early warning signal.

[0040] Figure 2 is a side view of an embodiment of the present invention, in which temperature sensors are installed in a partition space. As shown in Figure 2, the temperature sensors are installed on the upper surface of the upper cover 21 of the partition space 2 at the bottom of the battery 1 (if the partition space is located at the top, the temperature sensors may be installed on the lower surface of the lower cover of the upper partition space). The temperature sensors R1, R2, R3, and R4 collect and transmit temperature signals to the battery management system BMS. When a battery cell experiences thermal runaway, smoke is injected into the partition space through the injection valve at the bottom of the cell, causing heat to be applied to the upper cover of the partition space. The temperature sensor installed on the upper cover of the partition space detects the temperature change and can wake up the battery management system or generate an early warning signal based on the detected temperature.

[0041] FIG. 3 is another side schematic diagram of an embodiment of the present invention in which temperature sensors are arranged in the partition space 2. As shown in FIG. 3, the temperature sensors are installed in the partition space 2 at the bottom of the battery 1. The temperature sensors R1, R2, R3, and R4 collect and transmit temperature signals to the battery management system BMS. If a battery cell experiences thermal runaway, smoke is injected into the partition space through an injection valve at the bottom of the cell. The temperature sensors installed in the partition space can effectively detect temperature changes in the partition space in real time. Based on the detected temperature, the battery management system is woken up or an early warning signal is generated based on the detected temperature.

[0042] To improve the detection accuracy of the temperature sensor, when the temperature sensor is installed in the partition space, the temperature sensor can be installed in a position close to the explosion-proof valve in the partition space. By installing the temperature sensor at the explosion-proof valve, temperature changes in the partition space can be detected more quickly and effectively. For example, when the explosion-proof valve is open, the temperature sensor installed in the partition space can detect the state of the explosion-proof valve more effectively than a temperature sensor installed in another position.

[0043] The temperature sensor is not limited to being installed solely within the partition layer space or solely on the surface of the upper cover of the partition layer space, but may be installed simultaneously within the partition layer space and on the upper cover part of the partition layer space (for example, on the upper surface of the partition layer space). By detecting signals at detection positions including the partition layer space and generating a thermal runaway early warning signal, the accuracy and immediacy of the thermal runaway early warning signal are improved.

[0044] In a possible embodiment, the first signal used for thermal runaway early warning may further include signals such as the battery cell voltage, the balancing circuit board temperature, and the module temperature, which are used to help determine whether the battery is in a thermal runaway state. For example, if the voltage within the battery is lower than a predetermined voltage threshold and the battery is detected as being in an under-voltage state, the battery management system can be woken up to enter a continuous operation state, and a determination can be made as to whether to generate a thermal runaway early warning based on the collected signals. Specific wake-up methods are described below in different embodiments.

[0045] Example 1: 4 is a schematic diagram of a circuit structure for a battery thermal runaway early warning system according to one embodiment of the present application. As shown in FIG. 4, the circuit structure includes a sensor module 11, a sampling device with reverse wake-up function 12, a monitor 13, and a battery management system 14. The sensor module includes, but is not limited to, a balancing circuit board temperature sensor 111, a partition layer temperature sensor 112, a module temperature sensor 113, and a battery cell voltage detection assembly 114. The sensors used may include, but are not limited to, one, two, or more of these.

[0046] The balancing circuit board temperature sensor 111 is used to collect the temperature Tb of the balancing circuit board, and the partition layer temperature sensor 112 is used to detect the temperature Tg of the partition layer space. The module temperature sensor 113 is used to collect the temperature Tc of the battery module. In a possible embodiment, if the detection object is a battery pack, a battery pack temperature sensor may be included. The battery cell voltage detection assembly 114 is used to detect the cell voltage Vc of the module. In sleep mode, the sampling device 12 receives sensor signals collected from the balancing circuit board temperature sensor 111, the partition layer temperature sensor 112, the module temperature sensor 113, and the battery cell voltage detection assembly 114 and determines whether an abnormality occurs in the collected sensor signals. For example, the sampling device 12 can compare the collected balancing circuit board temperature Tb, the partition layer space temperature Tg, the battery module temperature Tc, and the battery module cell voltage Vc with the corresponding balancing circuit board temperature threshold Ttb, the partition layer space temperature threshold Ttg, the module temperature threshold Ttc, and the battery cell voltage Vtc, respectively. Based on the comparison result, it is determined whether a wake-up identifier for waking up the monitor 13 needs to be generated.

[0047] The monitor 13 is used to convert the wake-up identifier into a wake-up signal, which is then recognized by a battery management system (BMS) 14. For example, the monitor 13 can convert the wake-up identifier into a wake-up signal based on the SPI (Serial Peripheral Interface) communication protocol or the UART (Universal Asynchronous Receiver / Transmitter) communication protocol. The monitor 13 is used to provide a communication interface for communication with the sampling device 12. When the sampling device 12 monitors an abnormal signal indicating that the battery may be in a thermal runaway state, it wakes up the monitor 13 via the communication interface.

[0048] A plurality of sampling devices 12 can be installed to monitor the collected sensor signals, and a wake-up identifier determined from the abnormal sensor signal can be transmitted to the monitor 13 via a daisy-chain circuit structure through a communication interface provided by the monitor 13. After the monitor 13 performs the conversion process, the generated wake-up signal is transmitted to the battery management system 14, thereby waking up the battery management system 14, and the battery management system enters a continuous operation mode. The battery management system may include any controller that integrates the functions of the battery management system, such as a vehicle controller or a motor controller.

[0049] In the continuous operation mode, the battery management system can increase the sampling frequency, determine whether to generate an early warning signal based on the sampled signal, and mitigate losses based on the early warning signal, such as for a vehicle battery, the early warning signal can be used to notify passengers to leave the vehicle.

[0050] FIG. 5 is a schematic diagram of the implementation flow of a method for early warning of thermal runaway of a battery according to an embodiment of the present application. As shown in FIG. 5, the flow includes the following steps:

[0051] In S501, sensor signals are collected.

[0052] In the embodiment of the present application, the collected sensor signals include one or more of the following signals: the temperature Tb of the balance circuit board, the temperature Tg of the partition layer space, the temperature Tc of the battery module, and the cell voltage Vc of the battery module. The temperature of the partition layer space may be collected by a temperature sensor installed in the partition layer space, or may be collected by a temperature sensor installed on the upper surface of the upper cover of the bottom partition layer space.

[0053] In S502, if the sensor signal satisfies a preset wake-up condition, the sampling device transmits a wake-up identifier through a daisy-chain circuit structure.

[0054] The sampling device receives the sensor signals collected by the sensor assembly, compares the received sensor signals with corresponding thresholds, and determines whether an abnormality occurs in the received sensor signals. If an abnormality occurs, the sampling device transmits a wake-up identifier indicating the occurrence of the abnormality to the monitor via the communication interface of the monitor via the daisy-chain circuit structure.

[0055] When detecting a sample, the sampling device may enter a low power sleep state to reduce power consumption of the battery management system.

[0056] In S503, the monitor converts the wake-up identifier into a wake-up signal to wake up the battery management system, causing the battery management system to enter a continuous operation mode.

[0057] After the monitor receives the wake-up identifier through the communication interface, it can convert the wake-up identifier into a wake-up signal that can be recognized by the battery management system, which may be a wake-up signal based on the SPI protocol, a wake-up signal based on the UART protocol, etc.

[0058] The battery management system is woken up after receiving the wake-up signal, and the battery management system enters a continuous operation mode.

[0059] In S504, sensor signals are collected in a continuous operation mode, and an early warning signal is generated based on a preset early warning threshold and the sensor signals.

[0060] In the continuous operation mode, the battery management system increases the sampling frequency to collect sensor signals, including, but not limited to, one or more of the following: temperature of the partition space, cell voltage of the battery, temperature change rate of the partition space, cell voltage change rate of the battery, module temperature, module temperature change rate, balancing circuit board temperature, and balancing circuit board temperature change rate.

[0061] When the collected sensor signals include the temperature of the partition space, the battery cell voltage, the temperature change rate of the partition space, the battery cell voltage change rate, the module temperature, the module temperature change rate, the temperature of the balancing circuit board, and the temperature change rate of the balancing circuit board, the collected sensor signals can be compared with corresponding thresholds to determine whether the battery status is abnormal. If two of these elements are abnormal, an early warning signal can be generated to respond to the battery thermal runaway abnormality in real time. By setting the early warning signal to be generated when two or more elements are abnormal, the accuracy of the early warning signal generation can be improved and the false alarm rate can be reduced.

[0062] The early warning signal is not limited to being generated when two or more sensor signals are determined to be abnormal, but may be configured to be generated when an abnormality exists in any one element.

[0063] Example 2: 6 is a schematic diagram of another circuit structure for a battery thermal runaway early warning system according to an embodiment of the present application. As shown in FIG. 6, the circuit structure includes a sensor module 11, a sampling device 12 without reverse wake-up function, a monitor 13, a battery management system 14, and a sampling controller 15. The sensor module 11 includes, but is not limited to, a balancing circuit board temperature sensor 111, a partition layer temperature sensor 112, a module temperature sensor 113, and a battery cell voltage detection assembly 114. The sensors used may include, but are not limited to, one, two, or more of these.

[0064] The balancing circuit board temperature sensor 111 is used to collect the temperature Tb of the balancing circuit board, the partition layer temperature sensor 112 is used to detect the temperature Tg of the partition layer space, the module temperature sensor 113 is used to collect the temperature Tc of the module, and the battery cell voltage detection assembly 114 is used to detect the cell voltage Vc of the module. In sleep mode, the sampling device 12 receives sensor signals collected from the balancing circuit board temperature sensor 111, the partition layer temperature sensor 112, the module temperature sensor 113, and the battery cell voltage detection assembly 114 and sends the collected sensor signals to the sampling controller 15. The sampling controller 15 determines whether an abnormality occurs in the collected sensor signals. For example, the sampling controller 15 can compare the collected balancing circuit board temperature Tb, the partition layer space temperature Tg, the battery module temperature Tc, and the battery module cell voltage Vc with the corresponding balancing circuit board temperature threshold Ttb, the partition layer space temperature threshold Ttg, the module temperature threshold Ttc, and the battery cell voltage Vtc, respectively. Based on the comparison result, it is determined whether the battery management system 14 needs to be woken up and placed into a continuous operation mode.

[0065] The monitor 13 is used to convert the transmission signal sent by the daisy chain into a signal that the sampling controller can identify, for example, converting a sensor signal into a wake-up signal based on the SPI (Serial Peripheral Interface) communication protocol or a UART (Universal Asynchronous Receiver / Transmitter) communication protocol. The monitor 13 is used to provide a communication interface for communicating with the battery management system 14. When the sampling controller 15 monitors an abnormal signal that may indicate that the battery is in a thermal runaway state, the sampling controller 15 wakes up the battery management system and puts it into continuous operation mode.

[0066] A plurality of sampling devices 12 can be installed to collect sensor signals, and the sensor signals are transmitted to the sampling controller 15 through a daisy-chain circuit structure. The sampling controller 15 determines whether the sensor signals are abnormal by comparing the sensor signals with corresponding thresholds. If the sensor signals are abnormal, it wakes up the battery management system 14 and puts the battery management system into a continuous operation mode.

[0067] In the continuous operation mode, the battery management system 14 can increase the sampling frequency, determine whether to generate an early warning signal based on the sampled signal, and mitigate losses based on the early warning signal, for example, for a vehicle battery early warning signal, the early warning signal can be used to notify passengers to stay away from the vehicle.

[0068] FIG. 7 is a schematic diagram of the implementation flow of the method for early warning of thermal runaway of a battery according to an embodiment of the present application. As shown in FIG. 7, the flow includes the following steps:

[0069] In S701, sensor signals are collected.

[0070] In the embodiment of the present application, the collected sensor signals include one or more of the following signals: the temperature Tb of the balance circuit board, the temperature Tg of the partition layer space, the temperature Tc of the battery module, and the cell voltage Vc of the battery module. The temperature of the partition layer space may be collected by a temperature sensor installed in the partition layer space, or may be collected by a temperature sensor installed on the upper surface of the upper cover of the bottom partition layer space.

[0071] In S702, the sensor signal is acquired by the sampling controller.

[0072] When the sampling device receives the sensor signal collected by the sensor assembly, the sensor signal may be transmitted to the sampling controller via a daisy-chain circuit structure, or the sensor signal collected by the sensor module may be directly acquired. The sampling controller determines whether an abnormality occurs in the received sensor signal by comparing the received sensor signal with a corresponding threshold. If an abnormality occurs, a wake-up signal may be generated.

[0073] Under normal operating conditions, the power consumption of the sampling controller is much smaller than that of the MCU of the battery management system. Therefore, the sampling controller analyzes and judges the sensor signals, and reverse wakes up the MCU of the battery management system when an abnormality occurs, thereby effectively reducing the power consumption of the battery management system.

[0074] In S703, the sampling controller wakes up the battery management system and puts the battery management system into a continuous operation mode.

[0075] The sampling controller analyzes and compares the detected sensor signal to determine whether there is an abnormality, and if there is an abnormality, it wakes up the MCU of the battery management system, causing the battery management system to enter continuous operation mode.

[0076] In S704, sensor signals are collected in a continuous operation mode, and an early warning signal is generated based on a preset early warning threshold and the sensor signals.

[0077] In the continuous operation mode, the battery management system increases the sampling frequency to collect sensor signals, including, but not limited to, one or more of the following: temperature of the partition space, cell voltage of the battery, temperature change rate of the partition space, cell voltage change rate of the battery, module temperature, module temperature change rate, balancing circuit board temperature, and balancing circuit board temperature change rate.

[0078] When the collected sensor signals include the temperature of the partition space, the battery cell voltage, the temperature change rate of the partition space, the battery cell voltage change rate, the module temperature, the module temperature change rate, the temperature of the balancing circuit board, and the temperature change rate of the balancing circuit board, the collected sensor signals can be compared with corresponding thresholds to determine whether the battery status is abnormal. If two of these elements are abnormal, an early warning signal can be generated for real-time application to battery thermal runaway abnormalities. By setting the early warning signal to be generated when two or more elements are abnormal, the accuracy of the early warning signal generation can be improved and the false alarm rate can be reduced.

[0079] The early warning signal is not limited to being generated when two or more sensor signals are determined to be abnormal, but may be configured to be generated when an abnormality exists in any one element.

[0080] Example 3: 8 is a schematic diagram of another circuit structure for a battery thermal runaway early warning system according to an embodiment of the present application. As shown in FIG. 8, the circuit structure includes a sensor module 11, a sampling device 12, a monitor 13, a battery management system 14, and a comparison module 16. The sensor module 11 includes, but is not limited to, a balancing circuit board temperature sensor 111, a partition layer temperature sensor 112, a module temperature sensor 113, and a battery cell voltage detection assembly 114. The sensors used may include, but are not limited to, one, two, or more of these.

[0081] 8, the comparison module 16 includes a comparator 161, a first voltage divider circuit 162, and a second voltage divider circuit 163. The first voltage divider circuit 162 includes a first constant resistor R1 and a thermistor R2, and the second voltage divider circuit 163 includes a second constant resistor R3 and a third constant resistor R4. The constant resistor end of the first voltage divider circuit 162 is connected to the power supply, and the thermistor end is grounded. However, this is not limiting, and the constant resistor end may also be grounded and the thermistor end may be connected to the power supply.

[0082] The connection point between the two resistors in the voltage divider circuit is the selection node for the input voltage of the comparator. That is, the selection node in the first voltage divider circuit 162 is the connection point between the first constant resistor R1 and the thermistor R2, and the selection node in the second voltage divider circuit 163 is the connection point between the second constant resistor R3 and the third constant resistor R4.

[0083] When the constant resistor is connected to a power supply and the thermistor is grounded, a rise in temperature at the location where the thermistor is installed causes the thermistor's resistance to decrease, decreasing the first voltage at the selection node of the voltage divider circuit. The second voltage at the voltage divider node, determined by the second constant resistor R3 and the third constant resistor R4, remains constant. That is, the first voltage input to the first input of the comparator decreases with increasing temperature, while the second voltage input to the second input remains constant. The second voltage at the second input is used as the reference value. When the first voltage changes from greater than the second voltage to less than the second voltage, the comparison result changes. This change in the comparator's comparison result monitors the temperature change at the location where the thermistor is installed.

[0084] When the temperature at the thermistor mounting position rises, the comparator output changes accordingly. When the battery management system monitors the change signal, the MCU of the battery management system switches from sleep mode to continuous operation mode and increases the frequency of sensor signal collection. The sensor signal collected by the sensor module is sent to the sampling device via a daisy-chain circuit structure, then to the monitor via the communication interface, where it is converted and processed before being sent to the battery management system.

[0085] The input voltage of the comparator is not limited to the voltage at the voltage dividing node of the thermistor, and may further include the cell voltage of the battery, etc.

[0086] The sensor signals detected by the sensor module include the temperature Tb of the balancing circuit board detected by the temperature sensor of the balancing circuit board, the temperature Tg of the partition layer space detected by the temperature sensor of the partition layer, the temperature Tc of the module detected by the temperature sensor of the module, and the cell voltage Vc of the module detected by the cell voltage detection assembly of the battery.

[0087] In the continuous operation mode, the battery management system can increase the sampling frequency, determine whether to generate an early warning signal based on the sampled signal, and mitigate losses based on the early warning signal, such as for a vehicle battery, the early warning signal can be used to notify passengers to leave the vehicle.

[0088] FIG. 9 is a schematic diagram of the implementation flow of the method for early warning of thermal runaway of a battery according to an embodiment of the present application. As shown in FIG. 9, the flow includes the following steps:

[0089] In S901, the comparison result is output by the comparator.

[0090] In the embodiment of the present application, the comparator includes a first input terminal and a second input terminal. The first input terminal is used to input a detection signal, and the second input terminal is used to input a reference signal. A constant resistor can be selected to form a voltage divider circuit, and the reference signal at the second input terminal can be determined based on the voltage at the voltage divider node of the voltage divider circuit. The magnitude of the input voltage at the second input terminal can be determined based on the change threshold to be monitored, so that the first input terminal is smaller than or larger than the input voltage, and the corresponding sensor signal value can be used as a trigger condition for entering the continuous operation mode.

[0091] A voltage divider circuit is formed by connecting a thermistor and a constant resistor in series, and the connection point between the two is used as a voltage divider node. Temperature changes in the partition layer space of the battery can be monitored based on voltage changes at this voltage divider node.

[0092] Alternatively, the battery cell voltage can be input to the first input terminal of the comparator, and in a thermal runaway state, the battery cell voltage will drop. If the battery cell voltage is lower than the reference voltage at the second input terminal, the comparison output will change.

[0093] In S902, the battery management system is woken up based on the comparison result, so that the battery management system enters a continuous operation mode.

[0094] The comparator analyzes and compares the detected sensor signal to determine whether there is an abnormality, and if there is an abnormality, wakes up the battery management system, which then enters a continuous operation mode.

[0095] In S903, the battery management system collects sensor signals in a continuous operation mode, and generates an early warning signal based on a preset early warning threshold and the sensor signals.

[0096] In the continuous operation mode, the battery management system increases the sampling frequency to collect sensor signals, including, but not limited to, one or more of the following: temperature of the partition space, cell voltage of the battery, temperature change rate of the partition space, cell voltage change rate of the battery, module temperature, module temperature change rate, balancing circuit board temperature, and balancing circuit board temperature change rate.

[0097] When the collected sensor signals include the temperature of the partition space, the battery cell voltage, the temperature change rate of the partition space, the battery cell voltage change rate, the module temperature, the module temperature change rate, the temperature of the balancing circuit board, and the temperature change rate of the balancing circuit board, the collected sensor signals can be compared with corresponding thresholds to determine whether the battery status is abnormal. If two of these elements are abnormal, an early warning signal can be generated for real-time application to battery thermal runaway abnormalities. By setting the early warning signal to be generated when two or more elements are abnormal, the accuracy of the early warning signal generation can be improved and the false alarm rate can be reduced.

[0098] The early warning signal is not limited to being generated when two or more sensor signals are determined to be abnormal, but may be configured to be generated when an abnormality exists in any one element.

[0099] Example 4: 10 is a schematic diagram of a circuit structure for a battery thermal runaway early warning system according to an embodiment of the present application. As shown in FIG. 10, the circuit structure includes a sensor module 11, a sampling device with reverse wake-up function 12, a monitor 13, and a battery management system 14. The sensor module includes, but is not limited to, a balancing circuit board temperature sensor 111, a partition temperature sensor 112, a module temperature sensor 113, a battery cell voltage detection assembly 114, and a battery pack pressure monitoring sensor 115. The sensors used may include, but are not limited to, one, two, or more of these.

[0100] The balancing circuit board temperature sensor 111 is used to collect the temperature Tb of the balancing circuit board, the partition layer temperature sensor 112 is used to detect the temperature Tg of the partition layer space, the module temperature sensor 113 is used to collect the temperature Tc of the module, the battery cell voltage detection assembly 114 is used to detect the cell voltage Vc of the module, and the battery pack pressure monitoring sensor 115 is used to detect the gas pressure P. In sleep mode, the sampling device 12 receives sensor signals collected from the balancing circuit board temperature sensor 111, the partition layer temperature sensor 112, the module temperature sensor 113, the battery cell voltage detection assembly 114, and the battery pack pressure monitoring sensor 115, and determines whether any abnormality occurs in the collected sensor signals. For example, the sampling device 12 compares the collected balancing circuit board temperature Tb, partition space temperature Tg, battery module temperature Tc, and battery module cell voltage Vc with the corresponding balancing circuit board temperature threshold Ttb, partition space temperature threshold Ttg, module temperature threshold Ttc, and battery module cell voltage Vtc, respectively, compares the partition space gas pressure P with the gas pressure threshold Tp, and compares the partition space gas pressure change rate ΔP with a predetermined gas pressure rate threshold. Based on the comparison results, it determines whether a wake-up identifier for waking up the monitor 13 needs to be generated.

[0101] The monitor 13 is used to convert the wake-up identifier into a wake-up signal, which can then be recognized by the battery management system 14. For example, the monitor 13 can convert the wake-up identifier into a wake-up signal based on the SPI (Serial Peripheral Interface) communication protocol or the UART (Universal Asynchronous Receiver / Transmitter) communication protocol. The monitor 13 is used to provide a communication interface for communicating with the sampling device. When the sampling device monitors an abnormal signal indicating that the battery may be in a thermal runaway state, it wakes up the monitor 13 via the communication interface.

[0102] A plurality of sampling devices can be installed to monitor the collected sensor signals, and a wake-up identifier determined from the abnormal sensor signal can be transmitted to the monitor 13 via the daisy chain through a communication interface provided by the monitor 13 via a daisy chain circuit structure. After the monitor 13 performs the conversion process, the generated wake-up signal is transmitted to the battery management system 14 to wake up the battery management system 14, causing the battery management system 14 to enter a continuous operation mode.

[0103] In the continuous operation mode, the battery management system 14 can increase the sampling frequency, determine whether to generate an early warning signal based on the sampled signal, and mitigate losses based on the early warning signal, for example, for a vehicle battery early warning signal, the early warning signal can be used to notify passengers to stay away from the vehicle.

[0104] Alternatively, when the battery pack pressure monitoring sensor 115 monitors that the pressure in the battery pack is higher than a predetermined pressure threshold, it may directly wake up the battery management system 14 to enter a continuous operation mode, in which the sampling frequency of the battery pack pressure (i.e., the pressure inside the battery pack) is increased.

[0105] The battery pack pressure monitoring sensor 115 can be used to monitor the pressure inside the battery module.

[0106] The purpose of adding the battery pack pressure monitoring sensor based on Example 1 is to essentially prevent the battery cell voltage from changing under thermal runaway conditions when the cells are connected in parallel. If the high-temperature smoke emitted from the injector due to thermal runaway does not flow through the thermistor, the detected temperature change may be unclear, and detection relying on a combination of temperature and battery cell voltage may result in a failure to report a thermal runaway condition. To avoid this drawback, in addition to detecting temperature and battery cell voltage, gas pressure detection is also combined, thereby waking up the battery management system in real time and reducing the probability of a failure to report a thermal runaway early warning.

[0107] In a possible implementation, the pressure monitoring sensor may be installed solely to monitor and wake up the battery management system.

[0108] FIG. 11 is a schematic diagram of the implementation flow of the method for early warning of thermal runaway of a battery according to an embodiment of the present application. As shown in FIG. 11, the flow includes the following steps:

[0109] In S1101, the pressure signal of the battery pack is collected.

[0110] This embodiment of the present application is based on the first embodiment, and adds a battery pack pressure monitoring sensor. The battery pack pressure monitoring sensor can be installed within the partition space. In order to more effectively and reliably detect changes in gas pressure, the battery pack pressure monitoring sensor can be installed within the partition space and close to the explosion-proof valve, thereby enabling more sensitive detection of changes in gas pressure caused by thermal runaway within the partition space.

[0111] In the embodiment of the present application, the collected sensor signals include one or more of signals such as the temperature Tb of the balance circuit board, the temperature Tg of the partition layer space, the temperature Tc of the battery module, and the gas pressure P of the partition layer space. The temperature of the partition layer space may be a temperature collected by a temperature sensor installed in the partition layer space, or may be a temperature collected by a temperature sensor installed on the upper surface of the upper cover of the bottom partition layer space.

[0112] In S1102, if the pressure signal satisfies the preset wake-up condition, the battery pack pressure monitoring sensor sends a wake-up identifier to the battery management system, causing the battery management system to enter a continuous operation mode.

[0113] The battery pack pressure monitoring sensor collects the pressure signal in the battery pack and compares the pressure signal with a corresponding threshold to determine whether the received sensor signal has an abnormality, and if so, sends a wake-up signal to the MCU of the battery management system.

[0114] Comparing the pressure signal to a corresponding threshold may include comparing the pressure signal to a predetermined pressure threshold, or comparing the rate of change of the pressure signal to a predetermined rate of change threshold.

[0115] In S1103, sensor signals are collected in a continuous operation mode, and an early warning signal is generated based on a preset early warning threshold and the sensor signals.

[0116] In the continuous operation mode, the battery management system increases the sampling frequency to collect sensor signals, including, but not limited to, one or more of the following: temperature of the partition space, gas pressure of the partition space, temperature change rate of the partition space, gas pressure change rate of the partition space, module temperature, module temperature change rate, temperature of the balancing circuit board, and temperature change rate of the balancing circuit board.

[0117] When the collected sensor signals include the temperature of the partition space, the gas pressure of the partition space, the temperature change rate of the partition space, the gas pressure change rate of the partition space, the module temperature, the module temperature change rate, the temperature of the balancing circuit board, and the temperature change rate of the balancing circuit board, the collected sensor signals can be compared with corresponding thresholds to determine whether the battery status is abnormal. If two of these elements are abnormal, an early warning signal can be generated for real-time application to battery thermal runaway abnormalities. By setting the early warning signal to be generated when two or more elements are abnormal, the accuracy of the early warning signal generation can be improved and the false alarm rate can be reduced.

[0118] The early warning signal is not limited to being generated when two or more sensor signals are determined to be abnormal, but may be configured to be generated when an abnormality exists in any one element.

[0119] In the above embodiments, the magnitude of the number of each step does not mean the order of execution, and the execution order of each process should be determined based on its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0120] FIG. 12 is a schematic diagram of a battery thermal runaway early warning device according to an embodiment of the present application, in which a partition space is installed at the end of the battery, and the partition space is used to exhaust smoke when a cell of the battery experiences thermal runaway. As shown in FIG. 12, the device: a first collecting unit 1201 used to collect a first signal in the partition space; a wake-up unit 1202, used to wake up the battery management system into a continuous operation mode when the first signal satisfies a preset wake-up condition; and an early warning unit 1203, which is used to collect a second smoke signal in the continuous operation mode and generate a thermal runaway early warning signal when the second smoke signal meets a preset early warning condition.

[0121] The battery thermal runaway early warning device shown in FIG. 12 corresponds to the battery thermal runaway early warning method in the above embodiment.

[0122] Fig. 13 is a schematic diagram of a battery according to an embodiment of the present application. As shown in Fig. 13, the battery 13 of this embodiment includes a processor 130, a memory 131, and a computer program 132, such as a battery program, stored in the memory 131 and executed by the processor 130. When the processor 130 executes the computer program 132, it performs the steps of each of the battery method embodiments. Or, when the processor 130 executes the computer program 132, it performs the functions of each module / unit in each of the device embodiments.

[0123] For example, the computer program 132 may be divided into one or more modules / units, which are stored in the memory 131 and executed by the processor 130 to complete the present application. The one or more modules / units may be a series of computer program command segments capable of performing a specific function, and the command segments are used to describe the execution process of the computer program 132 in the battery 13.

[0124] The battery may include, but is not limited to, a processor 130 and a memory 131. Those skilled in the art will appreciate that Figure 13 is merely an example of a battery 13 and does not constitute a limitation on the battery 13, which may include more or fewer components than shown, or certain or different components may be combined, for example, the battery may further include input / output devices, network access devices, buses, etc.

[0125] Processor 130 may be a Central Processing Unit (CPU), or may be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, etc.

[0126] The memory 131 may be an internal storage unit of the battery 13, such as a hard disk or memory of the battery 13. The memory 131 may also be an external storage device of the battery 13, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a flash memory card, etc., disposed on the battery 13. Furthermore, the memory 131 may include not only an internal storage unit of the battery 13 but also an external storage device. The memory 131 is used to store the computer program and other programs and data required by the battery. The memory 131 may also be used to temporarily store data that has already been output or that is to be output.

[0127] As will be understood by those skilled in the art, for the sake of simplicity, only the case where the above-mentioned functional units and modules are separated is described as an example. In actual applications, the above functions can be allocated to different functional units or modules as needed, i.e., the internal structure of the device can be divided into different functional units or modules to achieve all or part of the above-described functions. The functional units and modules in the embodiments may be integrated into a single processing unit, each unit may exist physically independently, or two or more units may be integrated into a single unit. The integrated unit may be implemented in the form of hardware or software functional units. The specific names of the functional units and modules are used merely to facilitate distinction from each other and are not intended to limit the scope of protection of the present application. For the specific operating processes of the units and modules in the above-mentioned system, please refer to the corresponding processes in the above-mentioned method embodiments, and their description will be omitted here.

[0128] In the above embodiments, the description of each embodiment focuses on specific points, and for parts that are not detailed or described in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0129] Those skilled in the art can understand that the units and algorithm steps of each example described in connection with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to realize the described functions for each specific application, but such implementation methods should not be considered as departing from the scope of the present application.

[0130] In the embodiments provided herein, it should be understood that the disclosed devices and methods can be realized in other forms. For example, the device embodiments described above are merely illustrative, and the division of the modules or units is merely a division of logical functions. In actual implementation, other division schemes may be used, for example, multiple units or assemblies may be combined or integrated into another system, or some features may be omitted or not implemented. In other respects, the illustrated or discussed mutual couplings or direct couplings or communication connections may be indirect couplings or communication connections via interfaces, devices or units, and may be electrical, mechanical, or other forms.

[0131] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, i.e., they may be located in one place or distributed across multiple network units, and some or all of the units can be selected according to actual needs to achieve the objectives of the solution of this embodiment.

[0132] Furthermore, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist physically independently, or two or more units may be integrated into one unit. The integrated unit may be realized in the form of hardware or in the form of a software functional unit.

[0133] When the integrated module / unit is realized in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium. Based on this understanding, all or part of the flow of the method in the above embodiments of the present application can be completed by hardware associated with computer program commands, and the computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of each method embodiment can be realized. The computer program includes computer program code, which may be in source code format, object code format, an executable file, or any intermediate format. The computer-readable medium may include any entity or device capable of recording the computer program code, such as a recording medium, a USB memory, a removable hard disk, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), a carrier wave signal, a telecommunications signal, a software distribution medium, etc. It should be noted that the computer-readable medium may include content as appropriately increased or decreased based on the requirements of the laws and patent practices of the jurisdiction; for example, in certain jurisdictions, computer-readable medium does not include carrier wave signals and telecommunications signals, in accordance with the laws and patent practices of the jurisdiction.

[0134] The above-described embodiments are merely for illustrating the technical solutions of the present application, and are not intended to limit the same. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments may still be modified or some technical features may be equivalently replaced, and such modifications or replacements shall not cause the substance of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and all of them shall be encompassed in the protection scope of the present application.

Claims

1. 1. A method for early warning of thermal runaway in a battery, comprising: The battery is provided with a storage space used to exhaust smoke when a cell of the battery experiences thermal runaway, and the method includes: acquiring a detection signal at a detection position including the accommodation space; generating an early warning signal of thermal runaway based on the detection signal.

2. The method of claim 1 , wherein the containing space includes one or more of a partition layer space of the battery and an internal space of a hollow beam structure of the battery.

3. The method according to claim 2, wherein when the storage space includes a partition layer space of the battery, the detection position includes any position within the partition layer space and / or an inner layer surface of the partition layer space.

4. the detection signal includes a first signal and a second signal; Acquiring a detection signal at a detection position including the accommodation space includes: acquiring a first signal at a detection position including the accommodation space; If the first signal satisfies a preset wake-up condition, waking up a battery management system and obtaining a second signal from the battery management system; Including, 2. The method of claim 1, wherein the sampling frequency of the second signal is higher than the sampling frequency of the first signal.

5. The method of claim 4, wherein the first signal includes one or more of a temperature signal and a gas pressure signal at a sensing location located in the accommodation space.

6. 5. The method of claim 4, wherein the first signal further comprises one or more of a battery voltage, a temperature of a balancing circuit board of the battery, and a temperature of a cell of the battery.

7. 5. The method of claim 4, wherein the second signal includes two or more of a temperature signal of the accommodating space, a gas pressure signal of the accommodating space, a temperature change rate of the accommodating space, a gas pressure change rate of the accommodating space, a cell voltage of the battery, a cell temperature of the battery, a temperature change rate of the cell temperature of the battery, a temperature of a balancing circuit board of the battery, and a temperature change rate of a balancing circuit board of the battery.

8. generating an early warning signal of thermal runaway based on the detection signal; 8. The method of claim 7, further comprising generating a thermal runaway early warning signal if two or more of the second signals meet a preset early warning requirement.

9. Acquiring a detection signal at a detection position including the accommodation space includes: monitoring the first signal by a monitor having a host wake-up function; When the first signal satisfies a preset wake-up condition, waking up the sleep mode of the battery management system by the monitor to enter a normal operation mode, and obtaining the second signal by the battery management system in the normal operation mode; The method according to any one of claims 4 to 8, characterized in that it comprises:

10. Acquiring a detection signal at a detection position including the accommodation space includes: sampling the first signal in a low power consumption mode by a sampling controller; When the first signal satisfies a preset wake-up condition, the sampling controller wakes up the battery management system to enter a normal operation mode, and the sampling controller switches from a low power consumption mode to a normal operation mode, and the battery management system controls the sampling controller to acquire the second signal in the normal operation mode; The method according to any one of claims 4 to 8, characterized in that it comprises:

11. Acquiring a detection signal at a detection position including the accommodation space includes: comparing the first signal with a preset threshold signal; If the comparison result satisfies a preset wake-up condition, triggering a battery management system to enter a normal operation mode from a sleep mode, and controlling a sampling device by the battery management system to acquire the second signal in the normal operation mode; The method according to any one of claims 4 to 8, characterized in that it comprises:

12. The method according to any one of claims 4 to 8, characterized in that when the cells of the battery are in a parallel connection structure, the first signal includes a gas pressure signal and / or a temperature signal, and the collection position of the gas pressure signal and / or the temperature signal includes the accommodating space.

13. A battery thermal runaway early warning device, comprising: The battery is provided with a storage space used to exhaust smoke when a cell of the battery experiences thermal runaway, and the device is a detection signal acquisition unit used to acquire a detection signal at a detection position including the accommodation space; an early warning unit for generating an early warning signal for thermal runaway according to the detection signal; 10. An apparatus comprising:

14. 1. A battery including a memory, a processor, and a computer program stored in the memory and executed by the processor, 10. A battery according to claim 1, wherein said processor implements the steps of the method of claim 1 when executing said computer program.

15. A computer-readable storage medium on which a computer program is stored, 10. A computer-readable storage medium, characterized in that the computer program implements the steps of the method of claim 1 when executed by a processor.

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