WO2021205502A1 - バッテリ異常警告方法及びバッテリ異常警告装置 - Google Patents
バッテリ異常警告方法及びバッテリ異常警告装置 Download PDFInfo
- Publication number
- WO2021205502A1 WO2021205502A1 PCT/JP2020/015482 JP2020015482W WO2021205502A1 WO 2021205502 A1 WO2021205502 A1 WO 2021205502A1 JP 2020015482 W JP2020015482 W JP 2020015482W WO 2021205502 A1 WO2021205502 A1 WO 2021205502A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- abnormality
- battery
- pressure
- occurred
- voltage
- 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.)
- Ceased
Links
Images
Classifications
-
- H02J7/80—
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C5/00—Registering or indicating the working of vehicles
- G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
- G07C5/0816—Indicating performance data, e.g. occurrence of a malfunction
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
-
- 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
-
- 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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
-
- 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
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
-
- 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
- H01M10/488—Cells or batteries combined with indicating means for external visualization of the condition, e.g. by change of colour or of light density
-
- H02J7/60—
-
- H02J7/64—
-
- 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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- H02J2105/30—
-
- 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
Definitions
- the present invention relates to a battery abnormality warning method and a battery abnormality warning device that detect an abnormality of a battery mounted on a vehicle and warn the occupants of the vehicle.
- Patent Document 1 is disclosed as a protective device for stopping the use of a storage battery in which an abnormality in which the internal air pressure rises occurs.
- the housing and the lid are coupled so as to seal the inside of the housing, and when the pressure inside the storage battery rises, the housing and the lid are electrically connected by the bending of the lid. Was configured to block.
- an abnormality is determined based only on the pressure inside the storage battery as in the conventional protective device described above, it is not possible to distinguish between a temporary factor or an abnormality of low importance and an abnormality of high importance.
- the air pressure inside the battery changes depending on the altitude of the area where the vehicle is traveling and the strength of the cooling air of the battery cooler. Therefore, if the battery abnormality is judged based only on the internal air pressure of the battery, the air pressure may be increased due to a temporary factor or an abnormality of low importance, or the air pressure may be increased due to an abnormality of high importance. I could't tell if it was. As a result, it may not be possible to accurately detect a highly important abnormality such as thermal runaway.
- the present invention has been proposed in view of the above circumstances, and it is necessary to accurately detect a high-importance abnormality by distinguishing a temporary factor or a low-importance abnormality from a high-importance abnormality. It is an object of the present invention to provide a battery abnormality warning method and a battery abnormality warning device that can be used.
- the battery abnormality warning method and its device determine whether or not a pressure abnormality has occurred in the battery based on the atmospheric pressure in the battery pack, and determine whether or not a pressure abnormality has occurred in the battery. It is determined whether or not a voltage abnormality has occurred in the battery based on the cell voltage. Then, when it is determined that both the battery pressure abnormality and the battery voltage abnormality have occurred within a predetermined time, it is determined that the battery has an abnormality, and it is determined that the battery has an abnormality. When it is done, a warning is output to the occupants of the vehicle.
- the present invention it is possible to accurately detect a high-importance abnormality by distinguishing between a temporary factor or a low-importance abnormality and a high-importance abnormality.
- FIG. 1 is a block diagram showing a configuration of a battery abnormality warning system according to an embodiment of the present invention.
- FIG. 2 is a timing chart for explaining a battery abnormality warning method by the battery abnormality warning device according to the embodiment of the present invention.
- FIG. 3 is a timing chart for explaining a battery abnormality warning method by the battery abnormality warning device according to the embodiment of the present invention.
- FIG. 4 is a timing chart for explaining a battery abnormality warning method by the battery abnormality warning device according to the embodiment of the present invention.
- FIG. 5 is a flowchart showing a processing procedure of battery abnormality warning processing by the battery abnormality warning device according to the embodiment of the present invention.
- FIG. 1 is a block diagram showing a configuration of a battery abnormality warning system according to the present embodiment.
- the battery abnormality warning system 1 according to the present embodiment is provided on the battery pack 3 mounted on the vehicle, the battery abnormality warning device 5 mounted on the vehicle control module, and the meter panel of the vehicle. It is provided with a display unit 7.
- the battery abnormality warning system 1 is installed in the vehicle and is a system that detects an abnormality that has occurred in the battery pack 3 and warns the occupants of the vehicle.
- the battery abnormality warning system 1 distinguishes between temporary factors and abnormalities of low importance and abnormalities of high importance among the abnormalities that have occurred in the battery pack 3, and makes it possible to detect abnormalities of high importance. ..
- the battery abnormality warning system 1 has a function of detecting thermal runaway as a highly important abnormality and warning the occupant before reaching the thermal chain.
- Thermal runaway is an abnormality in which the cells constituting the lithium-ion battery of the battery pack 3 are short-circuited, causing heat generation and burning. Is.
- the case of thermal runaway will be described as an example as an abnormality of high importance, but an abnormality other than thermal runaway may be used.
- Battery pack 3 is a high-voltage battery pack mounted on a vehicle and equipped with a lithium-ion battery.
- the battery pack 3 includes a battery controller 31, pressure sensors 33a and 33b, and also includes a battery cooler and a junction box. Although the battery pack 3 is hermetically sealed, it is provided with a breather (vent), so that the internal air pressure is gently controlled.
- the battery controller 31 monitors the state of the lithium-ion battery, and detects and monitors the state of charge of the lithium-ion battery, the input / output voltage, the temperature, and the like. In particular, the battery controller 31 detects the minimum voltage, average voltage, maximum voltage, etc. of the cells constituting the lithium ion battery and outputs them to the vehicle control module by CAN (Controller Area Network) communication.
- CAN Controller Area Network
- the pressure sensors 33a and 33b detect the atmospheric pressure in the battery pack 3 and output it to the vehicle control module by CAN communication. Two pressure sensors are installed so that the air pressure in the battery pack 3 can be continuously detected even if one of the pressure sensors fails. Further, in the vehicle control module, the failure of the pressure sensor is diagnosed by comparing the values detected by the two pressure sensors.
- the battery abnormality warning device 5 is a device mounted on a vehicle control module (VehicleControlModule) that detects an abnormality in the battery pack 3 and warns the occupants of the vehicle. As shown in FIG. 1, the battery abnormality warning device 5 includes a voltage abnormality determination unit 51, a pressure abnormality determination unit 53, a battery abnormality determination unit 55, a running state determination unit 57, and a warning unit 59. .. The battery abnormality warning device 5 acquires information indicating the state of the lithium ion battery from the battery controller 31, and in particular, acquires the minimum voltage of the cells constituting the lithium ion battery by CAN communication.
- the battery abnormality warning device 5 acquires the air pressure in the battery pack 3 from the pressure sensors 33a and 33b by CAN communication or a wire harness. Then, when the battery abnormality warning device 5 determines that an abnormality has occurred in the battery pack 3, it outputs a warning to the occupants of the vehicle. At this time, the battery abnormality warning device 5 displays a warning message on the display unit 7, and outputs a warning sound and a voice of the warning message from the speaker installed in the vehicle interior.
- the voltage abnormality determination unit 51 acquires the minimum voltage of the cells constituting the lithium ion battery from the battery controller 31, and determines whether or not a voltage abnormality has occurred in the battery pack 3 based on the cell voltage of the lithium ion battery. do. Specifically, the voltage abnormality determination unit 51 determines that a voltage abnormality has occurred in the battery pack 3 when the minimum voltage of the cell is equal to or less than a predetermined voltage determination threshold value.
- the voltage determination threshold is set by verifying the voltage at which the lithium ion battery is considered to have an abnormality by experiments or simulations.
- the voltage abnormality determination unit 51 determines that a voltage abnormality has occurred just in case.
- the pressure abnormality determination unit 53 acquires the air pressure in the battery pack 3 from the pressure sensors 33a and 33b, and determines whether or not a pressure abnormality has occurred in the battery pack 3 based on the air pressure in the battery pack 3. Specifically, the pressure abnormality determination unit 53 causes a pressure abnormality in the battery pack 3 when a predetermined determination time elapses in a state where the amount of change in atmospheric pressure in the battery pack 3 is equal to or greater than a predetermined pressure determination threshold value. Judge that it is.
- the pressure abnormality determination unit 53 determines the pressure abnormality by using the amount of change in the atmospheric pressure instead of the absolute value of the atmospheric pressure in the battery pack 3. Since the atmospheric pressure in the battery pack 3 becomes low when the vehicle is traveling in a high altitude area, it may be erroneously determined that the pressure abnormality is determined using the absolute value of the atmospheric pressure. Therefore, the pressure abnormality determination unit 53 calculates the amount of change from the value of the atmospheric pressure before a certain period of time, and determines the pressure abnormality using the amount of change in the atmospheric pressure. As a result, even if the altitude of the area where the vehicle is traveling changes and the air pressure in the battery pack 3 changes, the pressure abnormality can be accurately determined.
- the pressure abnormality determination unit 53 determines that a pressure abnormality has occurred in the battery pack 3 when a predetermined determination time elapses in a state where the amount of change in atmospheric pressure is equal to or greater than the pressure determination threshold value.
- the fixed time is set to a time during which the increase in atmospheric pressure is considered to continue when a pressure abnormality occurs. Even if a pressure abnormality occurs in the battery pack 3 and the atmospheric pressure rises, the battery pack 3 is provided with a breather, so that the atmospheric pressure gradually decreases. Therefore, when a pressure abnormality occurs, the time for which the amount of change in atmospheric pressure equal to or higher than the pressure determination threshold continues is verified by experiments or simulations, and a fixed time is set.
- the pressure determination threshold is also set by verifying the amount of change in atmospheric pressure when a pressure abnormality occurs by experiments or simulations.
- the pressure abnormality determination unit 53 continues the determination of the pressure abnormality from the determination that the pressure abnormality has occurred in the battery pack 3 until a predetermined time elapses, and determines the predetermined pressure abnormality. When the time elapses, the pressure abnormality determination is canceled.
- the pressure abnormality determination unit 53 sets a duration for continuing the determination of the pressure abnormality, and during this duration, the determination of the pressure abnormality is continued even if the air pressure of the battery pack 3 drops. Then, when the duration elapses, the determination of the pressure abnormality is canceled.
- the duration is set by verifying by experiments and simulations how long the voltage abnormality will occur after the occurrence of the pressure abnormality. If a voltage abnormality is determined during the duration, the battery abnormality determination unit 55 determines that thermal runaway has occurred in the battery pack 3.
- the battery abnormality determination unit 55 determines that an abnormality has occurred in the battery pack 3 when it is determined that both the pressure abnormality of the battery pack 3 and the voltage abnormality of the battery pack 3 have occurred within a predetermined time. judge. That is, when the battery abnormality determination unit 55 determines that a pressure abnormality has occurred in the battery pack 3 and also determines that a voltage abnormality has occurred within the duration thereof, an abnormality has occurred in the battery pack 3. Judge that it is. Further, when the battery abnormality determination unit 55 determines that a pressure abnormality has also occurred when it is determined that a voltage abnormality has occurred in the battery pack 3, an abnormality has occurred in the battery pack 3. Judge that there is.
- the traveling state determination unit 57 determines the traveling state of the vehicle based on the information from the vehicle control module or the like. Specifically, the traveling state determination unit 57 determines whether the vehicle is traveling or stopped, and outputs the result to the warning unit 59.
- the warning unit 59 outputs a warning to the occupants of the vehicle when the battery abnormality determination unit 55 determines that an abnormality has occurred in the battery pack 3. Specifically, the warning unit 59 outputs and displays a warning message on the display unit 7, and outputs a warning sound and a voice of the warning message to a speaker installed in the vehicle interior. At this time, the warning unit 59 changes the warning message according to the traveling state of the vehicle acquired from the traveling state determination unit 57. For example, as shown in FIG. 1, when the vehicle is running, a warning message "Please stop the vehicle safely and evacuate to a safe place outside the vehicle" is output and the vehicle is stopped. In some cases, a warning message "Please evacuate to a safe place outside the vehicle” is output.
- the display unit 7 is a display provided on the meter panel and displays a warning message as shown in FIG.
- a warning light may be provided in advance on the meter panel and the warning light may be turned on.
- a warning sound or voice of the warning message is output from the speaker at the same time.
- the battery abnormality warning device 5 is provided with a controller, which is composed of a microcomputer, a microprocessor, a general-purpose electronic circuit including a CPU (Central Processing Unit), and peripheral devices such as a memory. Then, the controller has a function of detecting an abnormality in the battery pack 3 and outputting a warning. Each function of the controller can be implemented by one or more processing circuits.
- the processing circuit includes a programmed processing device such as a processing device including an electric circuit, and is an application specific integrated circuit (ASIC) or a conventional circuit arranged to perform the functions described in the embodiments. It also includes devices such as parts.
- ASIC application specific integrated circuit
- FIG. 2 is a timing chart for explaining a battery abnormality warning method by the battery abnormality warning device 5 according to the present embodiment.
- the pressure abnormality determination unit 53 determines that a pressure abnormality has occurred in the battery pack 3. And set the pressure abnormality flag.
- the pressure abnormality determination unit 53 starts counting the duration T2, and during the duration T2, the pressure abnormality is found even if the air pressure in the battery pack 3 drops. Continue the judgment. However, since the voltage abnormality is not determined during the duration T2, the pressure abnormality at time t1 is considered to be an abnormality other than thermal runaway such as a refrigerant abnormality of the battery cooler.
- the atmospheric pressure in the battery pack 3 rises again at time t3 without determining the voltage abnormality, and the amount of change in the atmospheric pressure becomes equal to or greater than the pressure determination threshold value.
- the pressure abnormality determination unit 53 again determines that a pressure abnormality has occurred in the battery pack 3.
- the duration T2 is reset and started from the time t4 when the pressure abnormality is determined again.
- the minimum cell voltage becomes equal to or lower than the voltage determination threshold value, and the voltage abnormality determination unit 51 determines that a voltage abnormality has occurred in the battery pack 3 and sets the voltage abnormality flag.
- the battery abnormality determination unit 55 determines that both the pressure abnormality and the voltage abnormality have occurred within the duration T2, and thus determines that the thermal runaway abnormality has occurred in the battery pack 3. And set the abnormality detection flag.
- the warning unit 59 outputs a warning.
- the battery abnormality warning device 5 determines that an abnormality has occurred in the battery pack 3 when it is determined that both the pressure abnormality and the voltage abnormality have occurred within a predetermined time. It is possible to reliably detect the occurrence of a highly important abnormality such as runaway. For example, if the battery abnormality is determined only by the pressure abnormality, such as the pressure abnormality at the time t1 in FIG. 2, there is a possibility that a less important abnormality such as the refrigerant abnormality of the battery cooler may be detected. However, by determining the battery abnormality using both the pressure abnormality and the voltage abnormality, it is possible to reliably detect the occurrence of a highly important abnormality such as thermal runaway.
- the battery abnormality warning device 5 starts by resetting the duration T2 from the time when the pressure abnormality is determined again.
- the battery abnormality warning device 5 starts by resetting the duration T2 from the time when the pressure abnormality is determined again.
- the battery abnormality warning device 5 starts by resetting the duration T2 at the time t4 from the time when the pressure abnormality is determined again.
- a battery abnormality warning method will be described when a voltage abnormality occurs before a pressure abnormality occurs.
- the minimum cell voltage becomes equal to or lower than the voltage determination threshold value, and the voltage abnormality determination unit 51 determines that a voltage abnormality has occurred in the battery pack 3 and sets the voltage abnormality flag. .. After that, when thermal runaway occurs in the battery pack 3, the cell voltage does not rise again, so that the determination of the voltage abnormality continues.
- the pressure abnormality determination unit 53 determines that a pressure abnormality has occurred in the battery pack 3. And set the pressure abnormality flag.
- the battery abnormality determination unit 55 determines that both a pressure abnormality and a voltage abnormality have occurred, so that it determines that a thermal runaway abnormality has occurred in the battery pack 3 and sets an abnormality detection flag. Set. After that, the warning unit 59 outputs a warning.
- the battery abnormality warning device 5 determines that the battery pack 3 has an abnormality, so that it is similar to thermal runaway. Abnormalities of high importance can be reliably detected.
- a battery abnormality warning method will be described when the power of the vehicle is turned off while the duration has elapsed.
- the case where the power of the vehicle is turned off will be described here, the case where the power of the battery abnormality warning device 5 is turned off may be used.
- the atmospheric pressure in the battery pack 3 rises, and the amount of change in atmospheric pressure becomes equal to or greater than the pressure determination threshold value.
- the pressure abnormality determination unit 53 determines that a pressure abnormality has occurred in the battery pack 3. And set the pressure abnormality flag.
- the pressure abnormality determination unit 53 starts counting the duration T2, and during the duration T2, the pressure abnormality is found even if the air pressure in the battery pack 3 drops. Continue the judgment.
- the pressure abnormality determination unit 53 backs up the pressure abnormality flag in the memory. Then, when the power of the vehicle is turned on at the time t4, the backed up pressure abnormality flag is reset, and the duration T2 is reset from the time t4 when the power of the vehicle is turned on to start counting.
- the minimum cell voltage becomes equal to or lower than the voltage determination threshold value, and the voltage abnormality determination unit 51 determines that a voltage abnormality has occurred in the battery pack 3 and sets the voltage abnormality flag.
- the battery abnormality determination unit 55 determines that both the pressure abnormality and the voltage abnormality have occurred within the duration T2, and thus determines that the thermal runaway abnormality has occurred in the battery pack 3. And set the abnormality detection flag.
- the warning unit 59 outputs a warning.
- the battery abnormality warning device 5 backs up the pressure abnormality flag and resets the duration T2 from the time when the power of the vehicle is turned on to start.
- the pressure abnormality flag is not cleared even when the power of the vehicle is turned off, so that the duration T2 can be prevented from being interrupted, and an abnormality of high importance can be reliably detected.
- the duration T2 that started at the time t2 in FIG. 4 has already ended at the time t5 when the voltage abnormality is determined, so that thermal runaway cannot be detected.
- the battery abnormality warning device 5 starts by resetting the duration T2 at the time t4 when the power of the vehicle is turned on, the determination of the voltage abnormality at the time t5 causes a highly important abnormality such as thermal runaway. Can be detected.
- FIG. 5 is a flowchart showing a processing procedure of battery abnormality warning processing by the battery abnormality warning device 5 according to the present embodiment.
- Battery error warning processing begins when the vehicle is powered on.
- step S101 the battery abnormality warning device 5 determines whether or not the diagnosis permission condition for diagnosing the abnormality of the battery pack 3 is satisfied. If the diagnosis permission condition is not satisfied, the abnormality of the battery pack 3 cannot be diagnosed normally, so that the battery abnormality warning process shown in FIG. 5 is not executed.
- the diagnostic permission conditions are that a sufficient power supply voltage is supplied to operate the controller that constitutes the battery abnormality warning device 5, that the CPU that constitutes the battery abnormality warning device 5 is normal, and that the maintenance function is used. Not so, the starter switch of the vehicle is off, etc. If these diagnostic permission conditions are satisfied, the process proceeds to step S103, and if not, it is continuously determined whether or not the diagnosis permission conditions are satisfied.
- step S103 the battery abnormality warning device 5 acquires the data necessary for executing the battery abnormality warning processing.
- the voltage abnormality determination unit 51 acquires the minimum cell voltage data from the battery controller 31, and the pressure abnormality determination unit 53 acquires the atmospheric pressure data of the battery pack 3 from the pressure sensors 33a and 33b.
- step S105 the pressure abnormality determination unit 53 calculates the amount of change from the value of the atmospheric pressure before a certain period of time as the amount of change in the atmospheric pressure of the battery pack 3. However, the pressure abnormality determination unit 53 determines the amount of change in atmospheric pressure when the pressure sensors 33a and 33b are not out of order and the vehicle control module is not immediately after starting or recovering from the failure. calculate.
- step S107 the pressure abnormality determination unit 53 determines whether or not the amount of change in atmospheric pressure calculated in step S105 is equal to or greater than the pressure determination threshold value. If the amount of change in atmospheric pressure is equal to or greater than the pressure determination threshold value, the process proceeds to step S115, and if the amount of change in atmospheric pressure is less than the pressure determination threshold value, the process proceeds to step S109.
- step S109 the voltage abnormality determination unit 51 determines whether or not the minimum cell voltage of the battery pack 3 is equal to or less than the voltage determination threshold value. If the minimum cell voltage is equal to or less than the voltage determination threshold value, the process proceeds to step S111, and if the minimum cell voltage is greater than the voltage determination threshold value, the process proceeds to step S113.
- step S111 the voltage abnormality determination unit 51 determines that a voltage abnormality has occurred in the battery pack 3, returns to step S107, and continuously determines whether or not a pressure abnormality has occurred in the battery pack 3. ..
- step S113 the battery abnormality warning device 5 determines whether or not the power of the vehicle has been turned off, and if it is turned off, the battery abnormality warning process according to the present embodiment ends. On the other hand, if it is not turned off, the process returns to step S101 to continuously execute the battery abnormality warning process.
- step S107 determines whether the amount of change in atmospheric pressure is equal to or greater than the pressure determination threshold value. If it is determined in step S107 that the amount of change in atmospheric pressure is equal to or greater than the pressure determination threshold value, the process proceeds to step S115, and the pressure abnormality determination unit 53 is in a state where the amount of change in atmospheric pressure is equal to or greater than the pressure determination threshold value. Determine if the fixed time has passed. If the amount of change in atmospheric pressure drops below the pressure determination threshold value before the confirmation time elapses, the process proceeds to step S113, and if the amount of change in atmospheric pressure exceeds the pressure determination threshold value and the confirmation time elapses, the step Proceed to S117.
- step S117 the pressure abnormality determination unit 53 determines that a pressure abnormality has occurred in the battery pack 3, and at the same time, starts counting the duration in step S119.
- step S121 the voltage abnormality determination unit 51 determines whether or not the minimum cell voltage of the battery pack 3 is equal to or less than the voltage determination threshold value. If the minimum cell voltage is equal to or less than the voltage determination threshold value, the process proceeds to step S127, and if the minimum cell voltage is greater than the voltage determination threshold value, the process proceeds to step S123.
- step S123 the pressure abnormality determination unit 53 determines whether or not the duration has elapsed. If the duration has elapsed, the determination of the pressure abnormality is canceled and the process proceeds to step S113. If the duration has not elapsed, the process proceeds to step S125.
- step S125 the pressure abnormality determination unit 53 determines whether the pressure abnormality is determined during the duration, or whether the vehicle is switched on after the power is turned off during the duration. If either the pressure abnormality is determined or the power supply of the vehicle is switched during the duration, the process returns to step S119 to reset the duration and start. On the other hand, if neither the determination of the pressure abnormality nor the switching of the power supply of the vehicle is performed during the duration, the process returns to step S121 to continue the determination of the voltage abnormality.
- step S121 if the minimum cell voltage is equal to or less than the voltage determination threshold value, the process proceeds to step S127.
- step S127 the voltage abnormality determination unit 51 determines that a voltage abnormality has occurred in the battery pack 3, and the battery abnormality determination unit 55 has generated a highly important abnormality such as thermal runaway in the battery pack 3. Judge that there is.
- step S129 the warning unit 59 outputs a warning to the display unit 7 and the speaker, and ends the battery abnormality warning process according to the present embodiment.
- the battery abnormality warning device 5 it is determined whether or not a pressure abnormality has occurred in the battery based on the air pressure in the battery pack, and based on the cell voltage of the battery. It is determined whether or not a voltage abnormality has occurred in the battery. Then, when it is determined that both the battery pressure abnormality and the battery voltage abnormality have occurred within a predetermined time, it is determined that the battery has an abnormality, and a warning is output to the occupants of the vehicle. This makes it possible to distinguish between temporary factors and low-importance anomalies and high-importance anomalies, accurately detect high-importance anomalies, and reliably warn vehicle occupants of battery anomalies. can do.
- the battery abnormality warning device 5 when a predetermined determination time elapses in a state where the amount of change in atmospheric pressure in the battery pack exceeds a predetermined threshold value, a pressure abnormality occurs in the battery. Judge that there is. As a result, even if the altitude of the area where the vehicle equipped with the battery travels changes and the air pressure in the battery pack changes, the pressure abnormality can be accurately determined.
- the battery abnormality warning device 5 continues the determination of the pressure abnormality from the time when the pressure abnormality is determined to occur in the battery until the predetermined time elapses, and when the predetermined time elapses. , Cancel the judgment of abnormal pressure. As a result, even if the battery is provided with a breather and the atmospheric pressure rises due to a pressure abnormality but gradually decreases, the battery abnormality can be accurately detected.
- the battery abnormality warning device 5 if the pressure abnormality is determined again while a predetermined time has elapsed after the determination that the pressure abnormality has occurred in the battery, the battery The predetermined time is reset and started from the time when the pressure abnormality of is determined again. As a result, even when a plurality of pressure abnormalities occur at the same time, it is possible to reliably detect an abnormality of high importance.
- the vehicle Reset the specified time from the time when the power of is turned on and start. As a result, even if the power of the vehicle is turned off while the predetermined time has elapsed, it is possible to reliably detect an abnormality of high importance.
- the present invention is not limited to the above-described embodiment, and even if the embodiment is other than this embodiment, as long as it does not deviate from the technical idea of the present invention, the present invention may be designed according to the design or the like. Of course, various changes are possible.
- Battery abnormality warning system 3 Battery pack 5 Battery abnormality warning device 7 Display unit 31 Battery controller 33a, 33b Pressure sensor 51 Voltage abnormality judgment unit 53 Pressure abnormality judgment unit 55 Battery abnormality judgment unit 57 Running condition judgment unit 59 Warning unit
Landscapes
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Tests Of Electric Status Of Batteries (AREA)
Abstract
Description
図1は、本実施形態に係るバッテリ異常警告システムの構成を示すブロック図である。図1に示すように、本実施形態に係るバッテリ異常警告システム1は、車両に搭載されたバッテリパック3と、車両制御モジュールに実装されたバッテリ異常警告装置5と、車両のメータパネルに設けられた表示部7とを備えている。
次に、本実施形態に係るバッテリ異常警告装置5によるバッテリの異常警告方法を説明する。図2は、本実施形態に係るバッテリ異常警告装置5によるバッテリの異常警告方法を説明するためのタイミングチャートである。
次に、本実施形態に係るバッテリ異常警告装置5によるバッテリの異常警告処理を説明する。図5は、本実施形態に係るバッテリ異常警告装置5によるバッテリの異常警告処理の処理手順を示すフローチャートである。バッテリの異常警告処理は、車両の電源がオンされると開始する。
以上、詳細に説明したように、本実施形態に係るバッテリ異常警告装置5では、バッテリパック内の気圧に基づいてバッテリに圧力異常が発生しているか否かを判定し、バッテリのセル電圧に基づいてバッテリに電圧異常が発生しているか否かを判定する。そして、バッテリの圧力異常とバッテリの電圧異常が所定時間内にいずれも発生していると判定された場合にバッテリに異常が発生していると判定し、車両の乗員に警告を出力する。これにより、一時的な要因や重要度の低い異常と、重要度の高い異常とを区別して、重要度の高い異常を正確に検出することができ、車両の乗員にバッテリの異常を確実に警告することができる。
3 バッテリパック
5 バッテリ異常警告装置
7 表示部
31 バッテリコントローラ
33a、33b 圧力センサ
51 電圧異常判定部
53 圧力異常判定部
55 バッテリ異常判定部
57 走行状態判定部
59 警告部
Claims (6)
- 車両に搭載されたバッテリの異常を検出して前記車両の乗員に警告を行うバッテリ異常警告方法であって、
前記バッテリのバッテリパック内の気圧に基づいて、前記バッテリに圧力異常が発生しているか否かを判定し、
前記バッテリのセル電圧に基づいて、前記バッテリに電圧異常が発生しているか否かを判定し、
前記バッテリの圧力異常と前記バッテリの電圧異常が所定時間内にいずれも発生していると判定された場合に、前記バッテリに異常が発生していると判定し、
前記バッテリに異常が発生していると判定されると、前記車両の乗員に警告を出力することを特徴とするバッテリ異常警告方法。 - 前記バッテリパック内の気圧の変化量が所定の閾値以上になった状態で所定の確定時間が経過した場合に、前記バッテリに圧力異常が発生していると判定することを特徴とする請求項1に記載のバッテリ異常警告方法。
- 前記バッテリに圧力異常が発生していると判定されてから前記所定時間が経過するまでの間、前記圧力異常の判定を継続し、前記所定時間が経過すると、前記圧力異常の判定を解除することを特徴とする請求項2に記載のバッテリ異常警告方法。
- 前記バッテリに圧力異常が発生していると判定されてから前記所定時間が経過している間に、前記バッテリに圧力異常が発生していると再度判定された場合には、前記バッテリの圧力異常が再度判定された時点から前記所定時間を再設定して開始することを特徴とする請求項1~3のいずれか1項に記載のバッテリ異常警告方法。
- 前記バッテリに圧力異常が発生していると判定されてから前記所定時間が経過している間に、前記車両の電源がオフされた場合には、前記車両の電源がオンされた時点から前記所定時間を再設定して開始することを特徴とする請求項1~4のいずれか1項に記載のバッテリ異常警告方法。
- 車両に搭載されたバッテリの異常を検出して前記車両の乗員に警告を行うコントローラを備えたバッテリ異常警告装置であって、
前記コントローラは、
前記バッテリのバッテリパック内の気圧に基づいて、前記バッテリに圧力異常が発生しているか否かを判定し、
前記バッテリのセル電圧に基づいて、前記バッテリに電圧異常が発生しているか否かを判定し、
前記バッテリの圧力異常と前記バッテリの電圧異常が所定時間内にいずれも発生していると判定された場合に、前記バッテリに異常が発生していると判定し、
前記バッテリに異常が発生していると判定されると、前記車両の乗員に警告を出力することを特徴とするバッテリ異常警告装置。
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BR112022020060A BR112022020060A2 (pt) | 2020-04-06 | 2020-04-06 | Método de aviso de anormalidade de bateria e dispositivo de aviso de anormalidade de bateria |
| CN202080099301.8A CN115362612A (zh) | 2020-04-06 | 2020-04-06 | 蓄电池异常警告方法及蓄电池异常警告装置 |
| MX2022012444A MX2022012444A (es) | 2020-04-06 | 2020-04-06 | Metodo de advertencia de anormalidad de bateria y dispositivo de advertencia de anormalidad de bateria. |
| EP20929820.7A EP4135147B1 (en) | 2020-04-06 | 2020-04-06 | Battery-abnormality warning method and battery-abnormality warning device |
| US17/913,178 US12087106B2 (en) | 2020-04-06 | 2020-04-06 | Battery abnormality warning method and battery abnormality warning device |
| JP2022513710A JP7380848B2 (ja) | 2020-04-06 | 2020-04-06 | バッテリ異常警告方法及びバッテリ異常警告装置 |
| PCT/JP2020/015482 WO2021205502A1 (ja) | 2020-04-06 | 2020-04-06 | バッテリ異常警告方法及びバッテリ異常警告装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2020/015482 WO2021205502A1 (ja) | 2020-04-06 | 2020-04-06 | バッテリ異常警告方法及びバッテリ異常警告装置 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2021205502A1 true WO2021205502A1 (ja) | 2021-10-14 |
Family
ID=78023077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2020/015482 Ceased WO2021205502A1 (ja) | 2020-04-06 | 2020-04-06 | バッテリ異常警告方法及びバッテリ異常警告装置 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US12087106B2 (ja) |
| EP (1) | EP4135147B1 (ja) |
| JP (1) | JP7380848B2 (ja) |
| CN (1) | CN115362612A (ja) |
| BR (1) | BR112022020060A2 (ja) |
| MX (1) | MX2022012444A (ja) |
| WO (1) | WO2021205502A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114069080A (zh) * | 2021-11-15 | 2022-02-18 | 合众新能源汽车有限公司 | 电池热失控预警方法及系统、智能终端、计算机可读介质 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0878000A (ja) | 1994-07-07 | 1996-03-22 | Alps Electric Co Ltd | 保護装置およびこの保護装置を用いた蓄電池 |
| JPH08140280A (ja) * | 1994-11-08 | 1996-05-31 | Matsushita Electric Ind Co Ltd | 蓄電池の充電制御装置 |
| JP2003197268A (ja) * | 2001-12-28 | 2003-07-11 | Nec Tokin Tochigi Ltd | 異常保護回路付電池パック |
| JP2009010443A (ja) * | 2007-06-26 | 2009-01-15 | Brother Ind Ltd | 電力供給遮断回路及び液滴吐出装置 |
| JP2019198195A (ja) * | 2018-05-11 | 2019-11-14 | 三菱電機株式会社 | 車載用リチウムイオンバッテリ制御装置 |
Family Cites Families (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11191436A (ja) * | 1997-12-26 | 1999-07-13 | Hitachi Ltd | 蓄電保護器 |
| JP3695186B2 (ja) * | 1998-12-21 | 2005-09-14 | トヨタ自動車株式会社 | 車輌の制動制御装置 |
| JP3610950B2 (ja) * | 2002-01-11 | 2005-01-19 | 日産自動車株式会社 | 電源装置 |
| JP2004147422A (ja) * | 2002-10-24 | 2004-05-20 | Mitsumi Electric Co Ltd | 遅延回路 |
| JP4747525B2 (ja) * | 2004-07-15 | 2011-08-17 | 日産自動車株式会社 | 燃料電池の故障診断装置 |
| JP2008064549A (ja) * | 2006-09-06 | 2008-03-21 | Toyo Keiki Co Ltd | マイコンガスメータ |
| JP5644080B2 (ja) * | 2009-09-25 | 2014-12-24 | 日産自動車株式会社 | バッテリの異常判定装置及び方法 |
| JP5786324B2 (ja) * | 2010-11-17 | 2015-09-30 | 日産自動車株式会社 | 組電池の制御装置 |
| JP5793957B2 (ja) * | 2011-05-23 | 2015-10-14 | トヨタ自動車株式会社 | 電動車両制御装置 |
| JP6237584B2 (ja) * | 2014-11-14 | 2017-11-29 | トヨタ自動車株式会社 | 燃料電池システムおよび空気系異常判定方法 |
| CN107709080B (zh) * | 2015-04-27 | 2020-10-27 | 松下知识产权经营株式会社 | 电池管理装置以及电源系统 |
| CN104950163B (zh) * | 2015-05-29 | 2018-01-09 | 珠海英搏尔电气股份有限公司 | 一种蓄电池充电装置输出电压反馈异常检测系统及方法 |
| CN205292321U (zh) * | 2016-01-26 | 2016-06-08 | 华霆(合肥)动力技术有限公司 | 电池组热失稳监测装置以及电动汽车 |
| CN105620304B (zh) * | 2016-01-26 | 2018-01-02 | 华霆(合肥)动力技术有限公司 | 电池组热失稳监测装置以及电动汽车 |
| CN107123768B (zh) * | 2016-02-25 | 2020-09-15 | 比亚迪股份有限公司 | 单体电池、电池模组、动力电池及电动汽车 |
| CN107123769B (zh) * | 2016-02-25 | 2019-09-13 | 比亚迪股份有限公司 | 单体电池、电池模组、电池包及电动汽车 |
| CN107134821B (zh) * | 2017-04-18 | 2020-03-31 | 上海蔚来汽车有限公司 | 电动汽车及其低压蓄电池电量管理系统 |
| EP3480611B1 (en) * | 2017-08-25 | 2022-12-28 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Terminal device, adapter, battery safety monitoring method and monitoring system |
| CN207842672U (zh) * | 2017-10-12 | 2018-09-11 | 奇瑞汽车股份有限公司 | 一种电动汽车高压安全环路互锁装置 |
| JP2020108206A (ja) * | 2018-12-26 | 2020-07-09 | トヨタ自動車株式会社 | 充電器および充電器の異常要因判定方法 |
| JP7381987B2 (ja) * | 2019-07-04 | 2023-11-16 | 三菱自動車工業株式会社 | 電池パックの異常検出装置 |
| CN112119318A (zh) * | 2019-10-09 | 2020-12-22 | 深圳市大疆创新科技有限公司 | 电池检测方法、电池、电子设备和存储介质 |
| JP7226249B2 (ja) * | 2019-11-01 | 2023-02-21 | トヨタ自動車株式会社 | バッテリ制御装置及び異常検知方法 |
| CN212062618U (zh) * | 2020-05-13 | 2020-12-01 | 摩登汽车(盐城)有限公司 | 无线通讯的电池管理系统、动力电池系统、汽车 |
-
2020
- 2020-04-06 WO PCT/JP2020/015482 patent/WO2021205502A1/ja not_active Ceased
- 2020-04-06 BR BR112022020060A patent/BR112022020060A2/pt not_active Application Discontinuation
- 2020-04-06 JP JP2022513710A patent/JP7380848B2/ja active Active
- 2020-04-06 EP EP20929820.7A patent/EP4135147B1/en active Active
- 2020-04-06 US US17/913,178 patent/US12087106B2/en active Active
- 2020-04-06 MX MX2022012444A patent/MX2022012444A/es unknown
- 2020-04-06 CN CN202080099301.8A patent/CN115362612A/zh active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0878000A (ja) | 1994-07-07 | 1996-03-22 | Alps Electric Co Ltd | 保護装置およびこの保護装置を用いた蓄電池 |
| JPH08140280A (ja) * | 1994-11-08 | 1996-05-31 | Matsushita Electric Ind Co Ltd | 蓄電池の充電制御装置 |
| JP2003197268A (ja) * | 2001-12-28 | 2003-07-11 | Nec Tokin Tochigi Ltd | 異常保護回路付電池パック |
| JP2009010443A (ja) * | 2007-06-26 | 2009-01-15 | Brother Ind Ltd | 電力供給遮断回路及び液滴吐出装置 |
| JP2019198195A (ja) * | 2018-05-11 | 2019-11-14 | 三菱電機株式会社 | 車載用リチウムイオンバッテリ制御装置 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114069080A (zh) * | 2021-11-15 | 2022-02-18 | 合众新能源汽车有限公司 | 电池热失控预警方法及系统、智能终端、计算机可读介质 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115362612A (zh) | 2022-11-18 |
| US20230134666A1 (en) | 2023-05-04 |
| JP7380848B2 (ja) | 2023-11-15 |
| EP4135147A4 (en) | 2023-05-24 |
| EP4135147B1 (en) | 2024-02-21 |
| BR112022020060A2 (pt) | 2022-11-22 |
| MX2022012444A (es) | 2022-10-27 |
| US12087106B2 (en) | 2024-09-10 |
| JPWO2021205502A1 (ja) | 2021-10-14 |
| EP4135147A1 (en) | 2023-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114523877A (zh) | 用于管理车辆电池的系统和方法 | |
| JP6790474B2 (ja) | 二次電池の監視装置、電池システム、二次電池の保護システム、車両 | |
| US8983698B2 (en) | In-vehicle apparatus for detecting collision of vehicle | |
| CN113169388B (zh) | 电池组、电源系统 | |
| US10381692B2 (en) | Method for monitoring the state of a battery in a motor vehicle | |
| JP4311363B2 (ja) | 蓄電システムおよび蓄電システムの異常処理方法 | |
| EP4027432A1 (en) | Marine battery with water ingress and shock detection | |
| CN110239348A (zh) | 一种电动汽车动力电池安全检测系统及方法 | |
| CN107444125B (zh) | 电力管理系统、管理装置、蓄电装置及电力管理方法 | |
| EP3134291B1 (en) | Vehicle and control method for vehicle | |
| CN107438534B (zh) | 用于车辆的高压能量系统的方法和装置 | |
| CN102481851A (zh) | 车辆电池安全系统 | |
| KR102520912B1 (ko) | 페일세이프 기능을 갖는 배터리 관리 시스템 및 방법 | |
| WO2020066260A1 (ja) | 電源システム、及び管理装置 | |
| US20200350642A1 (en) | Method for early detection of an imminent overheating of at least one battery cell of a battery, detection device, and motor vehicle | |
| JP2015190451A (ja) | 車両制御装置 | |
| WO2021205502A1 (ja) | バッテリ異常警告方法及びバッテリ異常警告装置 | |
| JP7381987B2 (ja) | 電池パックの異常検出装置 | |
| KR102371743B1 (ko) | 세이프티 플러그 제어부를 포함하는 절연저항 제어장치 및 절연저항 제어장치 제어방법 | |
| JP5900436B2 (ja) | 車載バッテリ充電装置 | |
| JP6865649B2 (ja) | 制御装置、電池監視システム、および電池監視方法 | |
| US20230194623A1 (en) | Battery pack monitoring device | |
| KR20140020499A (ko) | 하이브리드 차량의 고전압 배터리 보호 방법 | |
| KR100852739B1 (ko) | 차량용 전원 차단 장치 | |
| KR102548307B1 (ko) | 전기 자동차의 감전사고 방지방법 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 20929820 Country of ref document: EP Kind code of ref document: A1 |
|
| ENP | Entry into the national phase |
Ref document number: 2022513710 Country of ref document: JP Kind code of ref document: A |
|
| REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112022020060 Country of ref document: BR |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| ENP | Entry into the national phase |
Ref document number: 2020929820 Country of ref document: EP Effective date: 20221107 |
|
| ENP | Entry into the national phase |
Ref document number: 112022020060 Country of ref document: BR Kind code of ref document: A2 Effective date: 20221004 |