CN113119737B - Power battery thermal runaway monitoring device and method and power battery system - Google Patents
Power battery thermal runaway monitoring device and method and power battery system Download PDFInfo
- Publication number
- CN113119737B CN113119737B CN202110470532.1A CN202110470532A CN113119737B CN 113119737 B CN113119737 B CN 113119737B CN 202110470532 A CN202110470532 A CN 202110470532A CN 113119737 B CN113119737 B CN 113119737B
- Authority
- CN
- China
- Prior art keywords
- monitoring
- thermal runaway
- communication line
- power battery
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Transportation (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a thermal runaway monitoring device and method for a power battery and a power battery system, wherein the device comprises a monitoring parameter acquisition module, a monitoring parameter transmission module, a thermal runaway judgment module and a safety control execution module; the monitoring parameter acquisition module is used for acquiring thermal runaway monitoring parameters of the power battery of the vehicle in a plurality of running scenes; the monitoring parameter transmission module is used for acquiring the power battery thermal runaway monitoring parameters acquired by the monitoring parameter acquisition module and transmitting the power battery thermal runaway monitoring parameters to the thermal runaway judgment module; the thermal runaway judging module is used for judging whether the thermal runaway monitoring parameters meet preset triggering conditions or not and monitoring whether the parameter transmission module meets failure conditions or not; and the safety control execution module is used for determining whether to execute degradation, warning and disconnection of a high-voltage loop safety mechanism according to the result output by the thermal runaway judgment module. The device can effectively detect the thermal runaway of the power battery and improve the safety of the power battery system.
Description
Technical Field
The embodiment of the invention relates to the technical field of electric vehicles, in particular to a detection method and system of a power battery.
Background
The safety of the power battery becomes the bottom line of the development of new energy automobiles, and the safety of a battery system is improved at multiple angles and in a whole life cycle through chemical safety, mechanical safety, electrical safety and functional safety design in whole automobile enterprises, battery enterprises and other part enterprises at home and abroad, so that the thermal runaway of the power battery is avoided.
The current common thermal runaway monitoring method for the power battery judges whether the power battery is thermally runaway or not by monitoring the voltage, the temperature, the current, the pressure and the like of the battery in real time. However, when the battery is sprayed and fired, the acquisition sensors and the communication transmission link are damaged, so that the thermal runaway of the power battery cannot be detected in the first time.
Disclosure of Invention
The embodiment of the invention provides a power battery thermal runaway monitoring device and method and a power battery system, which can effectively detect the thermal runaway of a power battery and improve the safety of the power battery system.
In a first aspect, an embodiment of the present invention provides a power battery thermal runaway monitoring apparatus, where the apparatus includes a monitoring parameter acquisition module, a monitoring parameter transmission module, a thermal runaway determination module, and a safety control execution module; the monitoring parameter transmission module is respectively connected with the monitoring parameter acquisition module and the thermal runaway judgment module, and the thermal runaway judgment module is connected with the safety control execution module; the monitoring parameter acquisition module is used for acquiring thermal runaway monitoring parameters of the power battery of the vehicle under multiple running scenes; the monitoring parameter transmission module is used for acquiring the power battery thermal runaway monitoring parameters acquired by the monitoring parameter acquisition module and transmitting the power battery thermal runaway monitoring parameters to the thermal runaway judgment module; the thermal runaway judging module is used for judging whether the thermal runaway monitoring parameters meet preset triggering conditions and monitoring whether the parameter transmission module meets failure conditions; and the safety control execution module is used for determining whether to execute a safety mechanism according to the result output by the thermal runaway judgment module.
In a second aspect, an embodiment of the present invention further provides a method for monitoring thermal runaway of a power battery, including:
acquiring thermal runaway monitoring parameters of the power battery;
determining a judgment result according to whether the thermal runaway monitoring parameter meets a thermal runaway condition;
determining a monitoring result according to the monitoring communication line and whether the communication line meets a failure condition;
and determining whether the thermal runaway of the power battery occurs or not based on the judgment result and the monitoring result.
In a third aspect, an embodiment of the present invention further provides a power battery system, where the system includes a power battery and a power battery thermal runaway monitoring device;
and protective devices are arranged outside the monitoring parameter acquisition module and the monitoring parameter transmission module in the thermal runaway monitoring device, and are used for delaying the protection of the monitoring parameter acquisition module and the monitoring parameter transmission module and reducing the damage of the monitoring parameter acquisition module and the monitoring parameter transmission module.
The embodiment of the invention provides a power battery thermal runaway monitoring device, a power battery thermal runaway monitoring method and a power battery system, wherein the power battery thermal runaway monitoring device firstly acquires power battery thermal runaway monitoring parameters of a vehicle under multiple operation scenes through a monitoring parameter acquisition module; then, acquiring the thermal runaway monitoring parameters of the power battery acquired by the monitoring parameter acquisition module through a monitoring parameter transmission module and transmitting the thermal runaway monitoring parameters of the power battery to a thermal runaway judgment module; then judging whether the thermal runaway monitoring parameters meet preset triggering conditions or not through a thermal runaway judging module and monitoring whether a parameter transmission module meets failure conditions or not; and finally, determining whether to execute a safety mechanism or not by a safety control execution module according to a result output by the thermal runaway judgment module. The device can effectively detect the thermal runaway of the power battery and improve the safety of the power battery system.
Drawings
Fig. 1 is a schematic structural diagram of a power battery thermal runaway monitoring apparatus according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a power battery thermal runaway monitoring apparatus according to a second embodiment of the present invention;
fig. 3 is a schematic flowchart of a method for monitoring thermal runaway of a power battery according to a second embodiment of the present invention;
fig. 4 is a flowchart illustrating an example of a method for monitoring thermal runaway of a power battery according to a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of a power battery system according to a fourth embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided for a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and the embodiments of the invention are for illustration purposes only and are not intended to limit the scope of the invention.
It should be understood that the various steps recited in the method embodiments of the present invention may be performed in a different order and/or performed in parallel. Moreover, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the invention is not limited in this respect.
The term "including" and variations thereof as used herein is intended to be open-ended, i.e., "including but not limited to". The term "based on" is "based, at least in part, on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions for other terms will be given in the following description.
It should be noted that the terms "first", "second", and the like in the present invention are only used for distinguishing different devices, modules or units, and are not used for limiting the order or interdependence relationship of the functions performed by the devices, modules or units.
It is noted that references to "a", "an", and "the" modifications in the present invention are intended to be illustrative rather than limiting, and that those skilled in the art will recognize that reference to "one or more" unless the context clearly dictates otherwise.
The names of messages or information exchanged between devices in the embodiments of the present invention are for illustrative purposes only, and are not intended to limit the scope of the messages or information.
Example one
Fig. 1 is a schematic structural diagram of a power battery thermal runaway monitoring apparatus according to an embodiment of the present invention, which is applicable to determining whether a thermal runaway occurs in a power battery, where the apparatus may be implemented by software and/or hardware and is generally integrated in the power battery.
As shown in fig. 1, a thermal runaway monitoring apparatus for a power battery according to an embodiment of the present invention includes a monitoring parameter collecting module 110, a monitoring parameter transmitting module 120, a thermal runaway judging module 130, and a safety control executing module 140; the monitoring parameter transmission module 120 is respectively connected with the monitoring parameter acquisition module 110 and the thermal runaway judgment module 130, and the thermal runaway judgment module 130 is connected with the safety control execution module 140; the monitoring parameter acquisition module 110 is used for acquiring power battery thermal runaway monitoring parameters of a vehicle in multiple running scenes; the monitoring parameter transmission module 120 is configured to obtain a power battery thermal runaway monitoring parameter acquired by the monitoring parameter acquisition module 110, and transmit the power battery thermal runaway monitoring parameter to the thermal runaway judgment module 130; the thermal runaway judging module 130 is configured to judge whether the thermal runaway monitoring parameter meets a thermal runaway condition, and monitor whether the parameter transmission module 120 meets a failure condition; the safety control execution module 140 is configured to determine whether to execute a safety mechanism according to the result output by the thermal runaway determination module 130.
The multiple operation scenes may include, but are not limited to, a plurality of scenes of vehicle still, vehicle driving, and vehicle charging. The power battery thermal runaway parameters may include, but are not limited to, cell voltage, total current, battery temperature, and power battery internal pressure values within the power battery.
In this embodiment, the monitoring parameter transmission module 120 is connected to the monitoring parameter collection module 110 and the thermal runaway determination module 130 respectively, and sends the thermal runaway monitoring parameters of the power battery collected by the monitoring parameter collection module 110 to the thermal runaway determination module 130, so that the thermal runaway determination module 130 determines the thermal runaway monitoring parameters of the power battery.
In this embodiment, after the thermal runaway monitoring module 130 obtains the thermal runaway monitoring parameters of the power battery, it may determine whether the thermal runaway monitoring parameters meet the preset trigger conditions and monitor whether the parameter transmission module 120 meets the failure conditions.
The thermal runaway condition can be understood as a preset series of conditions, and can be set according to actual conditions, for example, the thermal runaway condition may include that the battery temperature exceeds the normal temperature and the duration of the battery temperature exceeding the normal temperature exceeds a preset time, and the duration of the cell voltage invalid value exceeds the preset time or a cell voltage sampling fault occurs. It should be noted that the normal temperature and the normal voltage obtain values of thermal runaway of the power battery of the vehicle under different operation scenes by establishing a thermal runaway model of the power battery, and the normal values can be determined by calculation.
The failure condition may be that the circuit inside the parameter transmission module 120 is damaged or broken, and the signal cannot be transmitted and the effective thermal runaway monitoring parameter cannot be transmitted, and the failure to transmit the effective thermal runaway monitoring parameter may be understood as that the thermal runaway monitoring parameter transmitted to the thermal runaway determination module 130 contains an invalid value.
In this embodiment, the safety control execution module 140 may obtain the result output by the thermal runaway determination module 130 by connecting with the thermal runaway determination module 130, and determine whether to trigger the safety mechanism according to the result. After the safety mechanism is triggered, degradation, warning and high-voltage loop disconnection operations can be performed to protect the power battery.
The device for monitoring the thermal runaway of the power battery comprises a monitoring parameter acquisition module, a monitoring parameter transmission module, a thermal runaway monitoring module and a thermal runaway judgment module, wherein the monitoring parameter acquisition module is used for acquiring thermal runaway monitoring parameters of the power battery of a vehicle under multiple running scenes; then judging whether the thermal runaway monitoring parameters meet preset thermal runaway conditions or not through a thermal runaway judging module and monitoring whether the parameter transmission module meets failure conditions or not; and finally, determining whether to execute a safety mechanism or not by a safety control execution module according to a result output by the thermal runaway judgment module. The device can effectively detect thermal runaway of the power battery and improve the safety of the power battery system.
Example two
Fig. 2 is a schematic structural diagram of a power battery thermal runaway monitoring device according to a second embodiment of the present invention, which is further optimized based on the first embodiment of the present invention, and reference is made to the first embodiment of the present invention for details that are not yet detailed in the present embodiment.
As shown in fig. 2, the power battery thermal runaway monitoring device includes: a monitoring parameter acquisition module 210, a monitoring parameter transmission module 220, a thermal runaway judgment module 230 and a safety control execution module 240.
In the present embodiment, the monitoring parameter collecting module 210 includes a sampling chip 211, a current sensor 212, a pressure sensor 213, and an I/O interface 214; the sampling chip 211 can be used for collecting the cell voltage and the cell temperature in the power cell; the current sensor 212 may be used to collect the total current of the power battery; the pressure sensor 213 is used for collecting the pressure value of the power battery, and the I/O interface is used for sending and receiving monitoring communication signals.
In the present embodiment, the monitoring parameter transmission module 220 includes two communication lines 221 and a monitoring communication line 222, which are intertwined with each other; the communication line 221 is a ring communication line connecting the monitoring parameter acquisition module 210 and the thermal runaway determination module 230, and is configured to transmit the thermal runaway monitoring parameter acquired from the monitoring parameter acquisition module 210 to the thermal runaway determination module 230; the monitoring communication line 222 is a unidirectional communication line connecting the monitoring parameter collection module 210 and the thermal runaway determination module 230, and is used for monitoring a communication state between the parameter collection module 210 and the thermal runaway determination module 230.
The communication line 221 is a ring communication line, and when one side of the communication line 221 is broken, the other side of the communication line can be used for parameter transmission. The monitoring communication line 222 is a unidirectional communication line, the monitoring communication line 222 is only used for sending a monitoring communication signal to the thermal runaway determination module 230, and if the thermal runaway determination module 230 can receive the monitoring communication signal, it is determined that the monitoring communication line 222 is not broken.
Further, the failure condition of the monitoring parameter transmitting module 220 is that the communication line 221 and the monitoring communication line 222 fail at the same time; the communication line 221 fails to indicate that the thermal runaway monitoring parameter received by the thermal runaway determining module 230 contains an invalid value, and the monitoring communication line 222 fails to indicate that the thermal runaway determining module 230 does not receive the monitoring communication signal sent by the monitoring communication line 222.
In this embodiment, if the thermal runaway monitoring parameter transmitted to the thermal runaway determination module 230 through the communication line 221 contains an invalid value, it is determined that the communication line 221 is failed, and if the monitoring communication line 222 cannot transmit the monitoring communication signal, it is determined that the monitoring communication line 222 is failed.
Alternatively, it is also possible to determine whether or not to perform a malfunction alarm depending on whether or not the communication line 221 and the monitoring communication line 222 are disconnected, and the malfunction alarm may include malfunction alarm information of the communication line 221 and alarm information of the monitoring communication line 222.
Specifically, if the thermal runaway determination module 230 cannot receive the monitoring communication signal, it may determine that the monitoring communication line 222 is in a disconnected state, and it is monitored that one of the communication lines 221 is not disconnected, it may determine that only the monitoring communication line 222 fails, and further may generate failure alarm information of the monitoring communication line 222. If it is monitored that at least one of the communication lines 221 is disconnected, it may be monitored whether the thermal runaway determination module 230 receives the monitoring communication signal, and if the thermal runaway determination module 230 receives the monitoring communication signal sent by the monitoring communication line 222, it may be determined that the monitoring communication line 222 is in a connected state, it may be determined that only the communication line 221 has a fault, and then fault alarm information of the communication line 221 may be generated.
According to the detection method for the power battery provided by the second embodiment of the invention, whether the thermal runaway of the power battery occurs or not can be judged through the communication line and the monitoring communication line. In addition, whether the communication line and the monitoring communication line break down or not can be effectively judged, and fault alarm information is generated, so that the working personnel can carry out all-around monitoring on the power battery.
EXAMPLE III
Fig. 3 is a schematic flow chart of a power battery thermal runaway monitoring method according to a second embodiment of the present invention, where the method is applicable to determining whether a thermal runaway condition occurs in a power battery, and the method is executed by a power battery thermal runaway monitoring apparatus, where the apparatus may be implemented by software and/or hardware and is generally integrated in the power battery.
As shown in fig. 3, a method for monitoring thermal runaway of a power battery provided in a third embodiment of the present invention includes:
and S310, acquiring thermal runaway monitoring parameters of the power battery.
In this embodiment, the power battery thermal runaway monitoring parameters may be obtained from the monitoring parameter acquisition module. The power battery thermal runaway parameters may include, but are not limited to, power battery temperature, power battery cell voltage, power battery total current, and pressure values inside the power battery.
The temperature of the power battery and the voltage of the single power battery can be collected through a sampling chip in the monitoring parameter collection module, the total current of the power battery can be collected through a current sensor in the monitoring parameter collection module, and the pressure value inside the power battery can be collected through a pressure sensor.
And S320, determining a judgment result according to whether the thermal runaway monitoring parameter meets the thermal runaway condition.
If the thermal runaway monitoring parameters meet the thermal runaway condition, determining that the judgment result is that the thermal runaway occurs in the power battery; and if the thermal runaway monitoring parameter does not meet the thermal runaway condition, determining that the judgment result is that the thermal runaway of the power battery does not occur.
For example, when the temperature of the battery exceeds the normal temperature and the duration of the temperature exceeding the normal temperature exceeds the preset time, and the duration of the invalid value of the cell voltage exceeds the preset time or the cell voltage sampling fails, it is determined that the thermal runaway monitoring parameter meets the thermal runaway condition. And when all the parameters in the thermal runaway monitoring parameters reach normal values, determining that the thermal runaway monitoring parameters do not meet the thermal runaway condition.
S330, determining a monitoring result according to the monitoring communication line and whether the communication line meets the failure condition.
If the monitoring communication line and the communication line both meet the failure condition, determining that the monitoring result is that the power battery is out of control due to heat; and if only one of the monitoring communication line and the communication line meets the failure condition, determining that the thermal runaway of the power battery does not occur according to the monitoring result.
And S340, determining whether the thermal runaway of the power battery occurs according to the judgment result and the monitoring result.
Specifically, the determining whether thermal runaway occurs in the power battery according to the judgment result and the monitoring result includes: if the judgment result is that the thermal runaway monitoring parameter reaches a preset trigger condition, determining that the thermal runaway of the power battery occurs; and if the monitoring result is that the communication line and the monitoring communication line meet the failure condition, determining that the thermal runaway of the power battery occurs.
In this embodiment, if any one of the determination result and the monitoring result is that the thermal runaway occurs in the power battery, it is determined that the thermal runaway occurs in the power battery.
Furthermore, whether fault alarm is carried out can be determined according to whether the communication line and the monitoring communication line are disconnected; wherein, the determining whether to perform fault alarm according to whether the communication line and the monitoring communication line are disconnected comprises: after the monitoring communication line is determined to be in a disconnected state, if the communication line is in a normal state, generating fault alarm information of the monitoring communication line; the normal state is that the communication line is not disconnected; and after at least one disconnected part of the communication line is determined, determining that the monitoring communication line is in a connected state according to the monitoring communication signal of the monitoring communication line, and generating fault alarm information of the communication line.
Specifically, if the thermal runaway determination module cannot receive the monitoring communication signal, it may be determined that the monitoring communication line is in a disconnected state, and if it is monitored that one of the communication lines is not disconnected, it may be determined that only the monitoring communication line fails, and then failure alarm information of the monitoring communication line may be generated. If the communication line is monitored to be disconnected at least one position, whether the thermal runaway judging module receives the monitoring communication signal or not can be monitored, if the thermal runaway judging module receives the monitoring communication signal sent by the monitoring communication line, the monitoring communication line can be determined to be in a connection state, only the communication line is determined to be in a fault, and then fault alarm information of the communication line can be generated.
Further, after determining whether to trigger thermal runaway according to the judgment result and the monitoring result, the method further includes: judging the hazard probability and the risk coefficient according to the thermal runaway monitoring result and determining whether to execute safety control; the safety mechanisms may include degradation, limiting power, opening high voltage contactors, performing meter prompts, and beeping alarms.
And if the thermal runaway monitoring result is that the thermal runaway of the power battery occurs, a safety mechanism can be executed.
For example, if the thermal runaway monitoring parameter is close to the preset thermal runaway threshold but does not reach the threshold, then the downgrade, power limit operation may be performed; if the thermal runaway monitoring parameter reaches a preset thermal runaway threshold, the operations of disconnecting the high-voltage contactor, prompting the instrument and giving a buzzing alarm can be executed.
The third embodiment of the invention provides a power battery thermal runaway monitoring method, which comprises the steps of firstly obtaining a power battery thermal runaway monitoring parameter; then determining a judgment result according to whether the thermal runaway monitoring parameter meets a thermal runaway condition; then determining a monitoring result according to the monitoring communication line and whether the communication line meets the failure condition; and finally, determining whether the thermal runaway of the power battery occurs or not based on the judgment result and the monitoring result.
On the basis of the foregoing embodiments, specific embodiments of the foregoing embodiments are provided, and fig. 4 is an exemplary flowchart of a power battery thermal runaway monitoring method provided in a third embodiment of the present invention. In this embodiment, the hard line is a monitoring communication line, and the daisy chain is a communication line, as shown in fig. 4, the method includes:
receiving a thermal runaway monitoring parameter and a hard wire signal, judging whether the thermal runaway monitoring parameter reaches a set threshold value, namely judging whether the thermal runaway monitoring parameter meets a thermal runaway condition, and if so, judging that the thermal runaway of the power battery occurs and triggering a safety mechanism;
if the thermal runaway monitoring parameters do not reach the set threshold, daisy chain broken chain and hard line broken line and the thermal runaway monitoring parameters which can be transmitted by the daisy chain are effective, reporting out the daisy chain broken chain fault and the hard line broken line fault;
if the thermal runaway monitoring parameters do not reach the set threshold value, daisy chain breaking and hard line breaking are carried out, and the thermal runaway monitoring parameters transmitted by the daisy chain contain invalid values, judging that the thermal runaway of the power battery occurs and triggering a safety mechanism;
if the thermal runaway monitoring parameter does not reach a set threshold value, the daisy chain is broken and the hard line is not broken, reporting the daisy chain broken chain fault;
if the thermal runaway monitoring parameter does not reach a set threshold value, the daisy chain is not broken and the hard line is broken, reporting the fault of the broken hard line;
and if the thermal runaway monitoring parameter does not reach the set threshold value, the daisy chain is not broken, and the hard line is not broken, judging the safety of the power battery.
Example four
Fig. 5 is a schematic structural diagram of a power battery system according to a fourth embodiment of the present invention, which can be adapted to determine whether thermal runaway occurs in the power battery, wherein the system can be implemented by software and/or hardware and is generally integrated on a vehicle. The vehicles in this embodiment include, but are not limited to: an electric vehicle.
As shown in fig. 5, the power battery system includes a power battery 520 and a power battery thermal runaway monitoring device 510; the protection device 512 is installed outside the monitoring parameter transmission module 511 and the monitoring parameter acquisition module 513 in the thermal runaway monitoring device 510, and the protection device 512 is used for performing delay protection on the monitoring parameter transmission module 511 and the monitoring parameter acquisition module 513, so as to reduce the damage to the monitoring parameter transmission module 511 and the monitoring parameter acquisition module 513.
Wherein, protector 512 can include safety cover and jet valve, and the jet valve can be used for protecting communication line, control communication line and collection module, and is specific, and the jet valve can prevent that the power battery from taking place gas injection when thermal runaway to collection module and communication line, guarantees collection module, communication line and control communication line's reliability. The damage of the acquisition module and the disconnection of the communication line and the monitoring communication line can be delayed through the additionally arranged protective cover.
Optionally, the communication line and the monitoring communication line are intertwined in the monitoring parameter transmission module 511, so as to ensure that the communication line and the monitoring communication line can be simultaneously blown when the power battery is in thermal runaway.
EXAMPLE five
An embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program is used, when executed by a processor, to execute a power battery thermal runaway monitoring method, where the method includes:
acquiring thermal runaway monitoring parameters of the power battery;
determining a judgment result according to whether the thermal runaway monitoring parameter meets a thermal runaway condition;
determining a monitoring result according to the monitoring communication line and whether the communication line meets a failure condition;
and determining whether the thermal runaway of the power battery occurs or not based on the judgment result and the monitoring result.
Optionally, the program, when executed by the processor, may be further configured to perform a method for detecting a power battery according to any embodiment of the present invention.
Computer storage media for embodiments of the invention may employ any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a Read Only Memory (ROM), an Erasable Programmable Read Only Memory (EPROM), a flash Memory, an optical fiber, a portable CD-ROM, an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. A computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take a variety of forms, including, but not limited to: an electromagnetic signal, an optical signal, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, fiber optic cable, radio Frequency (RF), etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (8)
1. A power battery thermal runaway monitoring device is characterized by comprising a monitoring parameter acquisition module, a monitoring parameter transmission module, a thermal runaway judgment module and a safety control execution module; the monitoring parameter transmission module is respectively connected with the monitoring parameter acquisition module and the thermal runaway judgment module, and the thermal runaway judgment module is connected with the safety control execution module;
the monitoring parameter acquisition module is used for acquiring thermal runaway monitoring parameters of the power battery of the vehicle in a plurality of running scenes;
the monitoring parameter transmission module is used for acquiring the power battery thermal runaway monitoring parameters acquired by the monitoring parameter acquisition module and transmitting the power battery thermal runaway monitoring parameters to the thermal runaway judgment module;
the monitoring parameter transmission module comprises two communication lines and a monitoring communication line which are mutually wound;
the communication line is a ring-shaped communication line which is connected with the monitoring parameter acquisition module and the thermal runaway judgment module and is used for transmitting the thermal runaway monitoring parameters acquired from the monitoring parameter acquisition module to the thermal runaway judgment module;
the monitoring communication line is a one-way communication line which is connected with the monitoring parameter acquisition module and the thermal runaway judgment module and is used for monitoring the communication state between the monitoring parameter acquisition module and the thermal runaway judgment module;
the thermal runaway judging module is used for judging whether the thermal runaway monitoring parameters meet thermal runaway conditions and monitoring whether the parameter transmission module meets failure conditions;
the safety control execution module is used for determining whether to execute a safety mechanism according to the result output by the thermal runaway judgment module;
the safety control execution module is connected with the thermal runaway judgment module to obtain a result output by the thermal runaway judgment module, and judges whether to trigger a safety mechanism according to the result;
after the safety mechanism is triggered, degradation, warning and high-voltage loop disconnection operations are executed to protect the power battery;
the thermal runaway judging module specifically comprises the following steps:
the thermal runaway judging module is further configured to determine that the monitoring communication line is in a disconnected state when the monitoring communication signal cannot be received, determine that the monitoring communication line fails if the communication line is monitored to be disconnected again, generate failure alarm information of the monitoring communication line, and send the failure alarm information to the safety control execution module;
the thermal runaway judging module is further configured to monitor whether a monitoring communication signal is received or not after it is monitored that at least one part of the communication line is disconnected, determine that the monitoring communication line is in a connected state if the monitoring communication signal sent by the monitoring communication line is received, determine that only the communication line fails, and further generate failure alarm information of the communication line and send the failure alarm information to the safety control execution module.
2. The device of claim 1, wherein the monitoring parameter acquisition module comprises a sampling chip, a current sensor, a pressure sensor and an I/O interface;
the sampling chip is used for collecting the monomer voltage and the battery temperature of the power battery;
the current sensor is used for collecting the total current of the power battery;
the pressure sensor is used for acquiring the pressure value inside the power battery;
the I/O interface is used for sending and receiving monitoring communication signals.
3. The apparatus according to claim 1, wherein the failure condition of the monitoring parameter transmission module is that the communication line and the monitoring communication line fail at the same time;
the communication line fails to be a thermal runaway monitoring parameter received by the thermal runaway judging module and contains an invalid value, and the monitoring communication line fails to be a monitoring communication signal sent by the monitoring communication line which is not received by the thermal runaway judging module.
4. A power battery thermal runaway monitoring method applied to the power battery thermal runaway monitoring device as claimed in any one of claims 1 to 3, wherein the method comprises the following steps:
acquiring thermal runaway monitoring parameters of the power battery;
determining a judgment result according to whether the thermal runaway monitoring parameter meets a thermal runaway condition;
determining a monitoring result according to whether the monitoring communication line and the communication line meet the failure condition;
determining whether thermal runaway occurs in the power battery based on the judgment result and the monitoring result;
after determining whether to trigger thermal runaway according to the judgment result and the monitoring result, the method further includes:
judging the hazard probability and the risk coefficient according to the thermal runaway monitoring result and determining whether to execute a safety mechanism or not; the safety mechanism comprises degradation, power limitation, disconnection of a high-voltage contactor, instrument prompting and buzzing alarming.
5. The method according to claim 4, wherein the determining whether the thermal runaway of the power battery occurs according to the judgment result and the monitoring result comprises:
if the judgment result is that the thermal runaway monitoring parameter reaches a preset trigger condition, determining that the thermal runaway of the power battery occurs;
and if the monitoring result is that the communication line and the monitoring communication line meet the failure condition, determining that the thermal runaway of the power battery occurs.
6. The method of claim 4, wherein determining whether to perform a malfunction alarm is based on whether said communication line and said supervisory communication line are disconnected;
wherein the determining whether to perform a malfunction alarm according to whether the communication line and the monitoring communication line are disconnected includes:
after the monitoring communication line is determined to be in a disconnected state, if the communication line is in a normal state, generating fault alarm information of the monitoring communication line; the normal state is that the communication line is not disconnected;
and after at least one broken part of the communication line is determined, determining that the monitoring communication line is in a connected state according to the monitoring communication signal of the monitoring communication line, and generating fault alarm information of the communication line.
7. A power battery system, which is applied to the power battery thermal runaway monitoring device of any one of claims 1-3, wherein the system comprises a power battery and a power battery thermal runaway monitoring device, and the power battery thermal runaway monitoring device is arranged inside the power battery;
and protective devices are arranged outside the monitoring parameter acquisition module and the monitoring parameter transmission module in the thermal runaway monitoring device, and are used for delaying the protection of the monitoring parameter acquisition module and the monitoring parameter transmission module and reducing the damage of the monitoring parameter acquisition module and the monitoring parameter transmission module.
8. The system of claim 7, wherein the shield device comprises a battery gas vent and a shield.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110470532.1A CN113119737B (en) | 2021-04-28 | 2021-04-28 | Power battery thermal runaway monitoring device and method and power battery system |
| PCT/CN2021/143102 WO2022227673A1 (en) | 2021-04-28 | 2021-12-30 | Power battery thermal runaway monitoring apparatus and method, and power battery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110470532.1A CN113119737B (en) | 2021-04-28 | 2021-04-28 | Power battery thermal runaway monitoring device and method and power battery system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113119737A CN113119737A (en) | 2021-07-16 |
| CN113119737B true CN113119737B (en) | 2023-02-21 |
Family
ID=76780676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110470532.1A Active CN113119737B (en) | 2021-04-28 | 2021-04-28 | Power battery thermal runaway monitoring device and method and power battery system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113119737B (en) |
| WO (1) | WO2022227673A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113119737B (en) * | 2021-04-28 | 2023-02-21 | 中国第一汽车股份有限公司 | Power battery thermal runaway monitoring device and method and power battery system |
| CN113745768B (en) * | 2021-07-28 | 2024-01-16 | 岚图汽车科技有限公司 | Power battery system and battery thermal runaway control method |
| CN115792629B (en) * | 2022-11-21 | 2024-04-02 | 惠州因博利电子科技有限公司 | Alarm monitoring system and method for lithium battery energy storage |
| CN115882090B (en) * | 2023-02-06 | 2023-05-23 | 中创新航技术研究中心(深圳)有限公司 | Intelligent self-control realization method and device of battery pack and battery pack |
| CN116118566B (en) * | 2023-03-27 | 2023-10-20 | 广东华庄科技股份有限公司 | Battery management method, system and storage medium |
| CN116176281B (en) * | 2023-04-25 | 2023-07-07 | 中国第一汽车股份有限公司 | Power battery function safety control method and device, vehicle and storage medium |
| CN117289147B (en) * | 2023-11-24 | 2024-04-02 | 珠海科创储能科技有限公司 | Battery monitoring method and device, storage medium and electronic equipment |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215823A (en) * | 2014-08-12 | 2014-12-17 | 上海申通地铁集团有限公司 | Vehicular battery safety monitoring system |
| CN104553852A (en) * | 2015-01-06 | 2015-04-29 | 重庆长安汽车股份有限公司 | Hybrid communication system of electric vehicle battery management system |
| CN106080251A (en) * | 2016-08-05 | 2016-11-09 | 合肥工业大学 | There is the electric automobile power battery management system of complete fault self-diagnosis function |
| CN206012357U (en) * | 2016-05-25 | 2017-03-15 | 烟台创为新能源科技有限公司 | A kind of battery thermal runaway detecting system communicated based on PWM mode |
| CN209590239U (en) * | 2018-12-14 | 2019-11-05 | 浙江零跑科技有限公司 | A kind of multi-functional BMS test macro |
| CN110712561A (en) * | 2019-10-15 | 2020-01-21 | 宁波吉利汽车研究开发有限公司 | Battery management system and electric automobile |
| CN110967642A (en) * | 2019-04-30 | 2020-04-07 | 宁德时代新能源科技股份有限公司 | Thermal runaway detection circuit and method |
| CN111653840A (en) * | 2020-06-08 | 2020-09-11 | 中国第一汽车股份有限公司 | Early warning method, device, equipment and storage medium |
| CN111959344A (en) * | 2020-07-06 | 2020-11-20 | 北汽福田汽车股份有限公司 | Battery management system, control method and vehicle |
| CN112448045A (en) * | 2019-08-31 | 2021-03-05 | 比亚迪股份有限公司 | Battery management system and electric automobile |
| CN112477687A (en) * | 2019-09-11 | 2021-03-12 | 重庆长安新能源汽车科技有限公司 | Thermal runaway early warning system for power storage battery of electric automobile |
| CN112684349A (en) * | 2021-01-25 | 2021-04-20 | 中国第一汽车股份有限公司 | Analysis method, verification method, device, equipment and medium for battery monomer failure |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2010106588A1 (en) * | 2009-03-16 | 2012-09-13 | 新神戸電機株式会社 | Power storage device and electronic circuit device used therefor |
| US8089248B2 (en) * | 2009-04-09 | 2012-01-03 | Ford Global Technologies, Llc | Battery monitoring and control system and method of use including redundant secondary communication interface |
| US9553460B2 (en) * | 2011-03-31 | 2017-01-24 | Elite Power Solutions Llc | Wireless battery management system |
| CN104603627B (en) * | 2012-09-10 | 2017-11-03 | 瑞萨电子株式会社 | Semiconductor device and battery voltage monitoring device |
| CN204008826U (en) * | 2014-08-12 | 2014-12-10 | 上海申通地铁集团有限公司 | Vehicular battery safety monitoring system |
| JP6432473B2 (en) * | 2015-09-11 | 2018-12-05 | 株式会社デンソー | Battery controller |
| US10168364B2 (en) * | 2016-11-29 | 2019-01-01 | Wipro Limited | Battery monitoring system for a vehicle and a method thereof |
| WO2019211659A1 (en) * | 2018-05-04 | 2019-11-07 | H55 Sa | Battery monitoring system and method for electric or hybrid aircrafts |
| CN110838609B (en) * | 2018-08-15 | 2023-04-07 | 上海汽车集团股份有限公司 | Power battery thermal runaway protection method, device and system |
| JP2020042968A (en) * | 2018-09-10 | 2020-03-19 | 株式会社豊田自動織機 | Power storage device module |
| JP7247543B2 (en) * | 2018-11-22 | 2023-03-29 | トヨタ自動車株式会社 | vehicle |
| CN110957542B (en) * | 2019-04-30 | 2021-03-09 | 宁德时代新能源科技股份有限公司 | Battery thermal runaway detection method, device and system and battery management unit |
| CN110979014B (en) * | 2019-11-21 | 2022-03-08 | 中国第一汽车股份有限公司 | Power supply safety monitoring method, device and system and vehicle |
| CN111337836B (en) * | 2020-03-10 | 2022-04-22 | 超威电源集团有限公司 | System and method for monitoring failed battery of storage battery pack |
| CN111391668B (en) * | 2020-03-31 | 2023-04-07 | 威睿电动汽车技术(宁波)有限公司 | Battery thermal runaway early warning processing method, device, equipment and storage medium |
| CN111907329B (en) * | 2020-06-29 | 2022-04-29 | 东风汽车集团有限公司 | Monitoring system and monitoring method capable of carrying out power battery full-time thermal runaway early warning |
| CN112038560A (en) * | 2020-09-15 | 2020-12-04 | 重庆金康动力新能源有限公司 | Battery package thermal runaway early warning fire extinguishing systems |
| CN113119737B (en) * | 2021-04-28 | 2023-02-21 | 中国第一汽车股份有限公司 | Power battery thermal runaway monitoring device and method and power battery system |
-
2021
- 2021-04-28 CN CN202110470532.1A patent/CN113119737B/en active Active
- 2021-12-30 WO PCT/CN2021/143102 patent/WO2022227673A1/en active Application Filing
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215823A (en) * | 2014-08-12 | 2014-12-17 | 上海申通地铁集团有限公司 | Vehicular battery safety monitoring system |
| CN104553852A (en) * | 2015-01-06 | 2015-04-29 | 重庆长安汽车股份有限公司 | Hybrid communication system of electric vehicle battery management system |
| CN206012357U (en) * | 2016-05-25 | 2017-03-15 | 烟台创为新能源科技有限公司 | A kind of battery thermal runaway detecting system communicated based on PWM mode |
| CN106080251A (en) * | 2016-08-05 | 2016-11-09 | 合肥工业大学 | There is the electric automobile power battery management system of complete fault self-diagnosis function |
| CN209590239U (en) * | 2018-12-14 | 2019-11-05 | 浙江零跑科技有限公司 | A kind of multi-functional BMS test macro |
| CN110967642A (en) * | 2019-04-30 | 2020-04-07 | 宁德时代新能源科技股份有限公司 | Thermal runaway detection circuit and method |
| CN112448045A (en) * | 2019-08-31 | 2021-03-05 | 比亚迪股份有限公司 | Battery management system and electric automobile |
| CN112477687A (en) * | 2019-09-11 | 2021-03-12 | 重庆长安新能源汽车科技有限公司 | Thermal runaway early warning system for power storage battery of electric automobile |
| CN110712561A (en) * | 2019-10-15 | 2020-01-21 | 宁波吉利汽车研究开发有限公司 | Battery management system and electric automobile |
| CN111653840A (en) * | 2020-06-08 | 2020-09-11 | 中国第一汽车股份有限公司 | Early warning method, device, equipment and storage medium |
| CN111959344A (en) * | 2020-07-06 | 2020-11-20 | 北汽福田汽车股份有限公司 | Battery management system, control method and vehicle |
| CN112684349A (en) * | 2021-01-25 | 2021-04-20 | 中国第一汽车股份有限公司 | Analysis method, verification method, device, equipment and medium for battery monomer failure |
Non-Patent Citations (1)
| Title |
|---|
| 电动汽车动力电池系统故障诊断研究;张骞等;《现代商贸工业》;20170105(第01期);第183-184页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022227673A1 (en) | 2022-11-03 |
| CN113119737A (en) | 2021-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113119737B (en) | Power battery thermal runaway monitoring device and method and power battery system | |
| EP3621142B1 (en) | Power battery pack safety prevention and control system for electric vehicle and control method | |
| CN106773933B (en) | Intelligent electric meter and its control method, device, system | |
| CN105406601A (en) | Intelligent power distribution cabinet monitoring system and monitoring method | |
| CN103904496A (en) | Intelligent cable plug and detection system thereof | |
| CN111965554B (en) | Method and device for detecting copper bar connection in battery pack, storage medium and electronic equipment | |
| CN114454774B (en) | Battery pack thermal runaway early warning system and method | |
| CN210155232U (en) | Power distribution network monitoring equipment and system | |
| CN109632146A (en) | Power equipment temperature monitoring system and radio temperature sensor | |
| CN211929386U (en) | Digital gas density relay with self-diagnosis function and monitoring device | |
| CN117439141A (en) | Hierarchical fire control implementation method and system based on BMS | |
| CN116914296A (en) | Battery abnormality early warning processing method and device | |
| CN115799690B (en) | Operation method and system of energy storage equipment | |
| CN116626492A (en) | Battery fault diagnosis method and device and vehicle | |
| CN107658979A (en) | A kind of monitoring device of overhead transmission line | |
| CN114882669A (en) | Safety monitoring and early warning system for hydrogenation station | |
| CN203397453U (en) | Electrical equipment burglary preventing and state monitoring device | |
| CN105872487A (en) | Power transmission line external breakage preventing monitor device based on wire power supply | |
| CN111754721A (en) | Smoke and fire alarm control method for rail transit vehicle and vehicle | |
| CN117289147B (en) | Battery monitoring method and device, storage medium and electronic equipment | |
| CN114537213B (en) | Power battery processing method, device, equipment and storage medium | |
| CN214795612U (en) | Intelligent power consumption safety prevention and control management system | |
| CN212207576U (en) | CPU damage alarm circuit | |
| CN215097465U (en) | Automobile anti-theft alarm system based on carriage air pressure detection | |
| CN116311808A (en) | Warning method and device for release of harmful gas in battery, processor and vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |