CN114290952A - Thermal runaway early warning system and method for power battery, vehicle and storage medium - Google Patents
Thermal runaway early warning system and method for power battery, vehicle and storage medium Download PDFInfo
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- CN114290952A CN114290952A CN202111547704.7A CN202111547704A CN114290952A CN 114290952 A CN114290952 A CN 114290952A CN 202111547704 A CN202111547704 A CN 202111547704A CN 114290952 A CN114290952 A CN 114290952A
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000000779 smoke Substances 0.000 claims abstract description 176
- 230000009471 action Effects 0.000 claims abstract description 24
- 238000004590 computer program Methods 0.000 claims description 8
- 230000003111 delayed effect Effects 0.000 abstract 1
- 238000004891 communication Methods 0.000 description 9
- 238000001514 detection method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 238000012544 monitoring process Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 230000003068 static effect Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002618 waking effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The application discloses power battery's thermal runaway early warning system, method, vehicle and storage medium, this system includes: the smoke detector is arranged in a battery pack of the power battery and used for collecting the current smoke concentration of the battery pack; a smoke fault detector for detecting whether the smoke detector is faulty; the wake-up module is used for generating a wake-up signal when the current smoke concentration is greater than the preset concentration; and the battery management system is used for exiting the sleep mode according to the wake-up signal when the vehicle is in the sleep mode and the current smoke concentration is greater than the preset concentration, and executing a corresponding thermal runaway early warning action on the vehicle, or executing a corresponding thermal runaway early warning action on the vehicle when the smoke fault detector detects a fault. Therefore, the technical problems that in the prior art, smoke or pressure awakening signals of the external equipment are completely relied on in the dormant state of the battery management system, and once the external equipment is delayed or broken down, early warning cannot be timely performed, the safety of the battery cannot be guaranteed and the like are solved.
Description
Technical Field
The application relates to the technical field of vehicles, in particular to a thermal runaway early warning system and method for a power battery, a vehicle and a storage medium.
Background
The electric automobile is rapidly applied and popularized in recent years due to the outstanding advantages of high efficiency, energy conservation, low carbon, environmental protection, low maintenance cost and the like, but the safety accidents caused by the thermal runaway event of the power battery are frequent, so that the great negative social influence is often caused, and therefore, how to accurately and unmistakably early warn the thermal runaway of the battery pack is very important.
In the related art, most of the existing battery pack thermal runaway early warning technologies use a hard-line wake-up circuit to realize 24-hour uninterrupted monitoring according to the temperature and voltage of a module and the smoke concentration or pressure value in a battery pack, which are acquired by a battery management system, as input parameters, and perform early warning after the set conditions of software are met.
However, when the battery management system is in a dormant state, the battery management system completely relies on smoke or pressure wake-up signals of external equipment, once a delay or fault occurs in an external smoke detector, the phenomena of missing report or false report are easy to occur, early warning cannot be timely performed, safety accidents are easy to cause, the safety and reliability of the battery cannot be guaranteed, a vehicle has certain safety defects, and the safety of lives and properties of users is threatened and needs to be improved.
Content of application
The application provides a thermal runaway early warning system, a thermal runaway early warning method, a vehicle and a storage medium of a power battery, and aims to solve the problems that in the prior art, smoke or pressure awakening signals of external equipment are completely relied on in a dormant state of a battery management system, and once the external equipment fails, the phenomena of missing report or false report are easy to occur, and the like.
An embodiment of a first aspect of the present application provides a thermal runaway early warning system for a power battery, including: the smoke detector is arranged in a battery pack of the power battery and used for collecting the current smoke concentration of the battery pack; a smoke fault detector for detecting whether the smoke detector is faulty; the wake-up module is used for generating a wake-up signal when the current smoke concentration is greater than a preset concentration; and the battery management system is used for exiting the sleep mode according to the awakening signal when the vehicle is in the sleep mode and the current smoke concentration is greater than the preset concentration, and executing a corresponding thermal runaway early warning action on the vehicle, or executing a corresponding thermal runaway early warning action on the vehicle when the smoke fault detector detects a fault.
Optionally, in an embodiment of the present application, the method further includes: and the resetting module is arranged on the smoke detector and is used for resetting the smoke detector after the battery management system exits the sleep mode, and when the smoke fault detector still detects a fault, the battery management system judges that the smoke detector has the fault.
Optionally, in an embodiment of the present application, the method further includes: and the at least one temperature collector and the at least one voltage collector are used for acquiring the current temperature and the current voltage of the battery pack, so that the battery management system executes the corresponding thermal runaway early warning action when judging that the power battery is in a thermal runaway state according to the current temperature and the current voltage.
Optionally, in an embodiment of the present application, the battery management system is further configured to, when it is determined that the power battery is not in the thermal runaway state according to the current temperature and the current voltage, control the smoke detector to enter a low power consumption state again.
Optionally, in an embodiment of the present application, the smoke fault detector is further configured to obtain an actual duty cycle of the smoke detector, and determine that the smoke detector is faulty when the actual duty cycle is not in a preset interval.
The embodiment of the second aspect of the application provides a thermal runaway early warning method for a power battery, which comprises the following steps: collecting the current smoke concentration of a battery pack of the power battery by using a smoke detector arranged in the battery pack, and generating a wake-up signal when the current smoke concentration is greater than a preset concentration; detecting whether the smoke detector is malfunctioning; and when the battery management system is in the sleep mode and the current smoke concentration is greater than the preset concentration, controlling the battery management system to exit the sleep mode according to the awakening signal, and executing a corresponding thermal runaway early warning action on the vehicle, or executing a corresponding thermal runaway early warning action on the vehicle when the smoke detector is detected to be in fault.
Optionally, in an embodiment of the present application, after the battery management system exits the sleep mode, the method further includes: and resetting the smoke detector, and judging that the smoke detector is in fault when the smoke fault detector still detects the fault.
Optionally, in an embodiment of the present application, before performing the corresponding thermal runaway warning action on the vehicle, the method further includes: acquiring the current temperature and the current voltage of the battery pack; and judging whether the power battery is in a thermal runaway state or not according to the current temperature and the current voltage, and executing the corresponding thermal runaway early warning action when the power battery is judged to be in the thermal runaway state.
An embodiment of a third aspect of the present application provides a vehicle, comprising: the thermal runaway early warning method for the power battery comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor executes the program to realize the thermal runaway early warning method for the power battery according to the embodiment.
A fourth aspect of the present application provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement a thermal runaway warning method for a power battery according to the foregoing embodiment.
The battery pack is provided with the smoke detector and the smoke fault detector, so that when the current smoke concentration is higher than the preset concentration or the smoke fault detector detects a fault, the corresponding thermal runaway early warning action is executed on the vehicle, the safety and the reliability of the power battery are guaranteed, and the life and property safety of a user is protected. Therefore, the problems that in the prior art, smoke or pressure awakening signals of the external equipment are completely relied on in the dormant state of the battery management system, and once the external equipment fails, the phenomena of missing report or false report are easy to occur and the like are solved. Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic block diagram of a thermal runaway warning system for a power battery according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a thermal runaway warning system for a power battery according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a thermal runaway warning system for a power cell in accordance with one embodiment of the present application;
FIG. 4 is a schematic circuit diagram of a smoke detection module according to an embodiment of the present application;
fig. 5 is a flowchart of a thermal runaway warning method for a power battery according to an embodiment of the present application;
FIG. 6 is a schematic structural diagram of a vehicle according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
The thermal runaway warning system, method, vehicle, and storage medium of the power battery according to the embodiments of the present application are described below with reference to the drawings. Aiming at the problems of missing report and false report caused by the fault of the smoke detector mentioned in the background technology center, the application provides a thermal runaway early warning system of a power battery. Therefore, the problems that in the prior art, smoke or pressure awakening signals of the external equipment are completely relied on in the dormant state of the battery management system, and once the external equipment fails, the phenomena of missing report or false report are easy to occur and the like are solved.
Specifically, fig. 1 is a schematic block diagram of a thermal runaway early warning system for a power battery according to an embodiment of the present disclosure.
As shown in fig. 1, the thermal runaway early warning system 10 for a power battery includes: a smoke detector 100, a smoke fault detector 200, a wake-up module 300 and a battery management system 400.
And the smoke detector 100 is arranged in the battery pack of the power battery and is used for collecting the current smoke concentration of the battery pack.
It will be appreciated that the power cell may produce a small amount of gas during charging, and a large amount of gas in the event of a short circuit or overheating of the power cell. The internal short circuit of the power battery is uncontrollable, namely when the power battery is converted into a thermal runaway state, the electrolyte is heated, gasified and decomposed, and finally the battery shell is cracked due to too large pressure, and high-pressure gas is sprayed out from the cracked part of the shell to generate a large amount of smoke. After a large amount of smoke is generated by the power battery, the power battery can be ignited in a short time and also contains harmful gas to a human body, so that the power battery needs to be monitored in real time. Therefore, according to the embodiment of the application, the smoke detector 100 can be arranged in the battery pack of the electric automobile and used for monitoring the smoke concentration in the battery pack of the electric automobile in real time, so that the thermal runaway state of the power battery can be found in time, a user can conveniently evacuate the electric automobile with the abnormal power battery in time, the follow-up danger which may be generated can be responded, and the safety protection effect is improved.
A smoke failure detector 200 for detecting whether the smoke detector 100 is malfunctioning.
Wherein, smoke detector 100 can be used for monitoring power battery's thermal runaway state, and when smoke detector 100 broke down, the battery safety of vehicle will can't be ensured, so in the embodiment of this application, still be equipped with smoke fault detector 200, be used for detecting whether smoke detector 100 broke down, thereby further strengthen the thermal runaway monitoring effect to the battery, guarantee that early warning system still can normal operating under the condition of smoke detector 100 trouble, avoid because of phenomena such as wrong report and the missed report that smoke detector 100 trouble leads to, greatly increased power battery thermal runaway monitoring's accuracy, electric automobile power battery's security has been improved, be favorable to protecting user's life and property safety.
Optionally, in an embodiment of the present application, the smoke fault detector 200 is further configured to obtain an actual duty cycle of the smoke detector 100, and determine that the smoke detector 100 is faulty when the actual duty cycle is not in a preset interval.
Here, the principle of the smoke failure detector 200 is illustrated. As will be understood by those skilled in the art, the duty cycle is the ratio of the time when the load or circuit is turned on to the time when the load or circuit is turned off, and the smoke detector 100 needs to operate continuously for 24 hours due to its particularity, so the actual duty cycle of the smoke detector 100 is the ratio of the continuous operation state time to the low power consumption state time, in the embodiment of the present application, a fault detection circuit needs to be connected to the smoke detection circuit in the original low power consumption state, and when the smoke detector 100 is switched to the continuous operation mode, whether the smoke detector 100 fails or not is determined according to the duty cycle sent by the smoke detector 100. In some specific embodiments, the parameter for determining the specific fault of the smoke detector 100 may be a static current value of smoke detection in a low power consumption state of the smoke detector 100, a temperature and a voltage value of a power battery collected in a power-on state of the battery management system 400, and the like, which is not limited herein.
And the wake-up module 300 is configured to generate a wake-up signal when the current smoke concentration is greater than the preset concentration.
And the battery management system 400 is configured to exit the sleep mode according to the wake-up signal when the vehicle is in the sleep mode and the current smoke concentration is greater than the preset concentration, and execute a corresponding thermal runaway early warning action on the vehicle, or execute a corresponding thermal runaway early warning action on the vehicle when the smoke fault detector 200 detects a fault.
It can be understood that, with the fuel automobile start-up back, the generator can be different for on-vehicle battery charging, and electric automobile relies on the battery to supply power, and the operation of its inside each item function all can produce the electric quantity consumption, and then influences electric automobile's continuation of the journey. For safety of the electric vehicle, the power battery should be monitored and failed continuously, and the battery management system 400 is in a sleep mode in a non-failure state to avoid excessive power consumption.
Furthermore, when the smoke concentration is higher than a certain concentration, the smoke detector 100 transmits a signal to the wake-up module 300, and the wake-up module 300 transmits a wake-up signal to the battery management system 400 to wake up the battery management system 400 in the sleep state. Likewise, when the smoke detector 100 fails, the smoke fault detector 200 transmits a signal to the wake-up module 300, and the wake-up module 300 wakes up the battery management system 400. After the battery management system 400 is awakened, a corresponding thermal runaway warning is performed.
Optionally, in an embodiment of the present application, the thermal runaway early warning system 10 of the embodiment of the present application further includes: at least one temperature harvester and at least one voltage harvester.
The at least one temperature collector and the at least one voltage collector are respectively used for obtaining the current temperature and the current voltage of the battery pack, so that when the battery management system 400 judges that the power battery is in the thermal runaway state according to the current temperature and the current voltage, corresponding thermal runaway early warning actions are executed.
It is understood that the thermal runaway indicator of the power battery includes, in addition to the smoke concentration, the temperature and voltage of the power battery. Therefore, in order to more accurately obtain the operating parameters of the power battery and further increase the accuracy of monitoring the thermal runaway of the power battery, a plurality of temperature collectors and voltage collectors may be further built in the embodiment of the application, and when the current temperature and voltage of the power battery exceed preset values, the battery management system 400 may also determine that the current power battery is in a thermal runaway state and perform corresponding thermal runaway early warning.
Optionally, in an embodiment of the present application, the battery management system 400 is further configured to control the smoke detector 100 to enter the low power consumption state again when it is determined that the power battery is not in the thermal runaway state according to the current temperature and the current voltage.
In some specific embodiments, when the current temperature and voltage of the power battery do not reach the thermal runaway standard, that is, the power battery operates normally, the thermal runaway phenomenon will not occur, and the battery management system 400 may control the smoke detector 100 to re-enter the low power consumption state, so as to effectively ensure the reliability of the vehicle.
Optionally, in an embodiment of the present application, the thermal runaway early warning system 10 of the embodiment of the present application further includes: a reset module disposed on the smoke detector 100.
The reset module is configured to reset the smoke detector 100 after the battery management system 400 exits the sleep mode, and when the smoke fault detector 200 still detects a fault, the battery management system 400 determines that the smoke detector 100 is faulty.
Specifically, the reset module may be located inside the smoke sensor 100, and when the battery management system 400 is awakened, that is, after the operation parameters of the power electric vehicle reach the thermal runaway standard, the battery management system 400 may output a reset signal to the reset module of the smoke detector 100, and the smoke detector 100 resets to stop sending the concentration warning signal. At this time, if the smoke fault detector 200 detects a fault, that is, the static current value of smoke detection in the low power consumption state of the smoke sensor 100, the temperature of the power battery and the voltage value collected in the power-on state of the battery management system 400 are in the abnormal state, the battery management system 400 determines that the smoke detector 100 is in fault at this time.
It should be noted that the preset value may be set by a person skilled in the art according to actual situations, and is not specifically limited herein.
The structure of the embodiments of the present application will be explained in detail below by way of example with reference to fig. 2.
In an embodiment of the present application, the smoke detector 100 has an output connected to the wake-up module 300 at one end and to the smoke sensor fault detector 200 at the other end. The smoke sensor fault detector 200 has an input connected to the smoke detector 100 and an output connected to the wake-up module 300. The wake-up module 300 has an input connected to the smoke detector 100, an input connected to the smoke sensor fault detector 200, and an output connected to the battery management system 400.
The smoke sensor reset module is located inside the smoke sensor 100, the output end of the smoke sensor reset module is connected to the smoke detector 100, and the input end of the smoke sensor reset module is connected to the battery management system 400. The battery management system 400 has an input end for operating parameters of the power battery in the battery pack and an input end connected to the wake-up module 300. One output end is connected with a VCU (Vehicular Communication Unit) and a terminal, and the other output end is connected with a reset module.
The working principle of the present application is further explained with reference to fig. 3 and 4.
The smoke detector 100 and the smoke fault detector 200 are integrated in the smoke sensor in the embodiment of the application and used for monitoring the smoke detection function of the smoke detector 100 in the static state of a power battery of an electric automobile in real time, a universal meter is used for measuring the current signal of the smoke detector 100 in the low-power-consumption state of the smoke sensor and used for designing and checking the driving signal for conducting the driving triode, and the point detection circuit of the smoke detector 100 is connected into the power circuit of the smoke sensor.
The specific embodiment of the application comprises the following steps:
step S301: the smoke detector 100 in the smoke sensor normally works and is in a low power consumption state, a signal drives the Q1 to enter a conducting state through a TEST pin, at the moment, the potential of the emitter of the Q1 corresponding to the base of the Q2 is pulled high, the Q2 is in a cut-off state, at the moment, the potential of a smoke fault wake-up signal is pulled low by the R6, and the battery management system 400 is in a normal sleep state.
Step S302: the smoke fault detector 200 in the smoke sensor detects whether the smoke detector 100 is faulty. Whether the smoke detector 100 is out of order is determined based on the actual duty cycle of the smoke detector 100, i.e., the ratio of the continuous operation state time of the smoke detector 100 to the low power consumption state time.
When the smoke detector 100 fails, the signal TEST will not turn on the base of the Q1, the collector and the emitter of the Q1 are in the off state, the emitter of the Q1 is the base of the Q2, which is pulled down by the R3, the Q2 is turned on, and the smoke fault detector 200 sends a wake-up signal to the battery management system 400.
When the smoke detector 100 is operating normally, it detects whether the current smoke concentration exceeds the threshold, if not, repeats the step, and if so, wakes up the battery management system 400.
Step S303: the battery management system 400 is awakened. The battery management system 400 after waking up switches the smoke detector 100 in the smoke sensor to a continuous operation mode, and determines whether the smoke sensor is in a normal operation state by detecting a Pulse Width Modulation (PWM) duty ratio sent by the smoke detector 100. If the smoke detector 100 is normal, the smoke detector is set to be at a low position and works in a low power consumption state again, if the PWM duty ratio sent by the smoke detector 100 is wrong, a fault signal of the smoke detector 100 is sent to the whole vehicle end, and meanwhile, the temperature and voltage signals are used as the basis for judging thermal runaway of a battery pack of the electric vehicle.
Step S304: and detecting whether the voltage temperature change meets the thermal runaway early warning condition. Whether the voltage temperature change collected by the voltage collector and the temperature collector meets the condition of thermal runaway alarm or not is judged, if the voltage temperature data change does not meet the condition, the smoke detector 100 in the smoke sensor is switched to a low power consumption state in a low-position smoke sensing mode, or the voltage temperature change meets the condition of thermal runaway alarm, and a thermal runaway alarm signal is sent to the whole vehicle and the terminal.
According to the power battery's thermal runaway early warning system that this application embodiment provided, through setting up independent smog fault detector, detect smog detector and whether break down to when detecting smog detector trouble, directly awaken battery management system, increased the accuracy of power battery thermal runaway early warning, improved electric vehicle's security, and then help protecting user's the security of the lives and property. Therefore, the technical problems that in the prior art, smoke or pressure awakening signals of the external equipment are completely relied on in the dormant state of the battery management system, and once the external equipment fails, the phenomena of missing report or false report are easy to occur and the like are solved.
Next, a thermal runaway warning method for a power battery provided by the embodiment of the application is described with reference to the accompanying drawings.
Fig. 5 is a flowchart of a thermal runaway warning method for a power battery according to an embodiment of the present application.
As shown in fig. 5, the thermal runaway early warning method for the power battery includes the following steps:
step S501, a smoke detector arranged in a battery pack of the power battery is used for collecting the current smoke concentration of the battery pack, and when the current smoke concentration is larger than a preset concentration, a wake-up signal is generated.
Step S502, whether the smoke detector has a fault is detected.
And S503, when the battery management system is in a sleep mode and the current smoke concentration is greater than the preset concentration, controlling the battery management system to exit the sleep mode according to the wake-up signal, and executing a corresponding thermal runaway early warning action on the vehicle, or executing a corresponding thermal runaway early warning action on the vehicle when a smoke detector fault is detected.
Optionally, in an embodiment of the present application, after the battery management system exits the sleep mode, the method further includes: and resetting the smoke detector, and judging that the smoke detector fails when the smoke fault detector still detects the fault.
Optionally, in an embodiment of the present application, before performing the corresponding thermal runaway warning action on the vehicle, the method further includes: acquiring the current temperature and the current voltage of the battery pack; and judging whether the power battery is in a thermal runaway state according to the current temperature and the current voltage so as to execute a corresponding thermal runaway early warning action when the power battery is judged to be in the thermal runaway state.
It should be noted that the foregoing explanation of the embodiment of the thermal runaway early warning system for a power battery is also applicable to the thermal runaway early warning method for a power battery of this embodiment, and details are not repeated here.
According to the thermal runaway early warning method for the power battery, whether the smoke detector breaks down or not is detected by arranging the independent smoke fault detector, and when the smoke detector breaks down, the battery management system is directly awakened, so that the accuracy of thermal runaway early warning of the power battery is improved, the safety of an electric vehicle is improved, and further the security of lives and property of users is protected. Therefore, the technical problems that in the prior art, smoke or pressure awakening signals of the external equipment are completely relied on in the dormant state of the battery management system, and once the external equipment fails, the phenomena of missing report or false report are easy to occur and the like are solved.
Fig. 6 is a schematic structural diagram of a vehicle according to an embodiment of the present application. The vehicle may include:
a memory 601, a processor 602, and a computer program stored on the memory 601 and executable on the processor 602.
The processor 602 executes the program to implement the thermal runaway warning method for the power battery provided in the above embodiments.
Further, the vehicle further includes:
a communication interface 603 for communication between the memory 601 and the processor 602.
The memory 601 is used for storing computer programs that can be run on the processor 602.
If the memory 601, the processor 602 and the communication interface 603 are implemented independently, the communication interface 603, the memory 601 and the processor 602 may be connected to each other through a bus and perform communication with each other. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 6, but this is not intended to represent only one bus or type of bus.
Alternatively, in practical implementation, if the memory 601, the processor 602, and the communication interface 603 are integrated on a chip, the memory 601, the processor 602, and the communication interface 603 may complete communication with each other through an internal interface.
The processor 602 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement embodiments of the present Application.
The embodiment also provides a computer readable storage medium, on which a computer program is stored, wherein the program is executed by a processor to implement the thermal runaway warning method for a power battery.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "N" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more N executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of implementing the embodiments of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
Claims (10)
1. The utility model provides a thermal runaway early warning system of power battery which characterized in that includes:
the smoke detector is arranged in a battery pack of the power battery and used for collecting the current smoke concentration of the battery pack;
a smoke fault detector for detecting whether the smoke detector is faulty;
the wake-up module is used for generating a wake-up signal when the current smoke concentration is greater than a preset concentration; and
and the battery management system is used for exiting the sleep mode according to the awakening signal when the vehicle is in the sleep mode and the current smoke concentration is greater than the preset concentration, and executing a corresponding thermal runaway early warning action on the vehicle, or executing a corresponding thermal runaway early warning action on the vehicle when the smoke fault detector detects a fault.
2. The system of claim 1, further comprising:
and the resetting module is arranged on the smoke detector and is used for resetting the smoke detector after the battery management system exits the sleep mode, and when the smoke fault detector still detects a fault, the battery management system judges that the smoke detector has the fault.
3. The system of claim 1, further comprising:
and the at least one temperature collector and the at least one voltage collector are used for acquiring the current temperature and the current voltage of the battery pack, so that the battery management system executes the corresponding thermal runaway early warning action when judging that the power battery is in a thermal runaway state according to the current temperature and the current voltage.
4. The system of claim 3, wherein the battery management system is further configured to re-control the smoke detector to enter a low power consumption state upon determining that the power battery is not in the thermal runaway state based on the current temperature and the current voltage.
5. The system of claim 1, wherein the smoke fault detector is further configured to obtain an actual duty cycle of the smoke detector, and determine that the smoke detector is faulty when the actual duty cycle is not within a preset interval.
6. A thermal runaway early warning method for a power battery, which is characterized in that the thermal runaway early warning system for the power battery as claimed in any one of claims 1 to 5 is adopted, wherein the method comprises the following steps:
collecting the current smoke concentration of a battery pack of the power battery by using a smoke detector arranged in the battery pack, and generating a wake-up signal when the current smoke concentration is greater than a preset concentration;
detecting whether the smoke detector is malfunctioning; and
when the battery management system is in the sleep mode and the current smoke concentration is greater than the preset concentration, controlling the battery management system to exit the sleep mode according to the awakening signal, and executing a corresponding thermal runaway early warning action on the vehicle, or executing a corresponding thermal runaway early warning action on the vehicle when the smoke detector is detected to be in fault.
7. The method of claim 6, further comprising, after the battery management system exits the sleep mode:
and resetting the smoke detector, and judging that the smoke detector is in fault when the smoke fault detector still detects the fault.
8. The method of claim 6, further comprising, prior to performing a corresponding thermal runaway warning action on the vehicle:
acquiring the current temperature and the current voltage of the battery pack;
and judging whether the power battery is in a thermal runaway state or not according to the current temperature and the current voltage, and executing the corresponding thermal runaway early warning action when the power battery is judged to be in the thermal runaway state.
9. A vehicle, characterized by comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the program to implement the thermal runaway warning method for a power battery according to any one of claims 6 to 8.
10. A computer-readable storage medium, on which a computer program is stored, the program being executed by a processor for implementing a method for warning of thermal runaway of a power cell according to any one of claims 6 to 8.
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