CN112824919B - Battery thermal runaway alarm threshold determining method, device and equipment - Google Patents
Battery thermal runaway alarm threshold determining method, device and equipment Download PDFInfo
- Publication number
- CN112824919B CN112824919B CN201911148459.5A CN201911148459A CN112824919B CN 112824919 B CN112824919 B CN 112824919B CN 201911148459 A CN201911148459 A CN 201911148459A CN 112824919 B CN112824919 B CN 112824919B
- Authority
- CN
- China
- Prior art keywords
- battery cell
- thermal runaway
- characteristic parameter
- battery
- alarm threshold
- 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
-
- 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
- G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current 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
-
- 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
Abstract
The embodiment of the disclosure provides a battery thermal runaway alarm threshold determining method, device and equipment. The method comprises the following steps: detecting characteristic parameters of the battery cell when thermal runaway occurs in a plurality of test scenes to obtain a parameter value group; the parameter value group comprises cell characteristic parameter values of cell characteristic parameters when thermal runaway occurs in each test scene; and determining a thermal runaway alarm threshold of the characteristic parameters of the battery cells according to the parameter value group. Compared with the condition that the thermal runaway alarm threshold value is determined according to the manual experience in the prior art, the embodiment of the disclosure can determine the thermal runaway alarm threshold value with ensured accuracy and reliability based on the parameter value set obtained in the actual test scene, so that the thermal runaway alarm signal can be reliably sent in time.
Description
Technical Field
The embodiment of the disclosure relates to the technical field of batteries, in particular to a method, a device and equipment for determining a battery thermal runaway alarm threshold value.
Background
With the rapid development of the technical field of vehicles, vehicles such as new energy automobiles have become more and more popular. In many cases, safety accidents of vehicles such as new energy automobiles are caused by battery systems as power sources, and thermal runaway phenomena may occur even under low temperature conditions because battery cells (i.e., cells) in the battery systems belong to high energy carriers and have active properties.
In the prior art, a thermal runaway alarm signal is generally output by a vehicle to prompt drivers and passengers to take corresponding measures for thermal runaway, however, the output time of the thermal runaway alarm signal is determined based on a thermal runaway alarm threshold value selected according to manual experience, and the thermal runaway alarm signal cannot be timely and reliably sent out due to the fact that the thermal runaway alarm threshold value is likely to be inaccurate.
Disclosure of Invention
The embodiment of the disclosure provides a method, a device and equipment for determining a thermal runaway alarm threshold of a battery, which are used for solving the problem that a thermal runaway alarm signal cannot be timely and reliably sent out due to inaccurate thermal runaway alarm threshold in the prior art.
In a first aspect, embodiments of the present disclosure provide a battery thermal runaway alarm threshold determination method, the method comprising:
detecting characteristic parameters of the battery cell when thermal runaway occurs in a plurality of test scenes to obtain a parameter value group; the parameter value group comprises cell characteristic parameter values of the cell characteristic parameters when thermal runaway occurs in each test scene;
and determining a thermal runaway alarm threshold of the battery cell characteristic parameter according to the parameter value set.
In some embodiments, the determining the thermal runaway alarm threshold for the cell characteristic parameter from the set of parameter values includes:
Screening one cell characteristic parameter value in the parameter value set as a reference value of the cell characteristic parameter according to a screening rule matched with the cell characteristic parameter;
and determining a thermal runaway alarm threshold of the battery cell characteristic parameter according to the reference value of the battery cell characteristic parameter.
In some embodiments, the screening the one cell characteristic parameter value in the parameter value set as the reference value of the cell characteristic parameter according to the screening rule matched with the cell characteristic parameter includes:
and screening the cell characteristic parameter value with the smallest value from the parameter value group as the reference value of the cell characteristic parameter under the condition that the cell characteristic parameter is the cell temperature, the cell voltage or the cell temperature rise slope.
In some embodiments, after determining the thermal runaway alarm threshold for the cell characteristic parameter from the set of parameter values, the method further comprises:
transmitting thermal runaway configuration information to the vehicle;
the thermal runaway configuration information is used for indicating the vehicle to output a thermal runaway alarm signal under the condition that a preset condition is met, and the preset condition is related to a thermal runaway alarm threshold value of the battery cell characteristic parameter.
In some embodiments, the number of the cell characteristic parameters is at least three, and the at least three cell characteristic parameters include a cell temperature, a cell voltage, and a cell temperature rise slope;
the preset conditions include at least one of the following:
the temperature value of the battery cell is larger than the thermal runaway alarm threshold value of the temperature of the battery cell, and the temperature rise slope value of the battery cell is larger than the thermal runaway alarm threshold value of the temperature rise slope of the battery cell;
the temperature rise slope value of the battery cell is larger than the thermal runaway alarm threshold value of the temperature rise slope of the battery cell, and the voltage value of the battery cell is smaller than the thermal runaway alarm threshold value of the voltage of the battery cell;
the temperature value of the battery cell is larger than a thermal runaway alarm threshold value of the temperature of the battery cell, and the voltage acquisition of the battery cell fails;
the battery cell voltage value is higher than a thermal runaway alarm threshold value of the battery cell voltage, and the duration that the battery cell current value is greater than or equal to a preset duration.
In some embodiments, the plurality of test scenarios includes at least one of:
a test scene of the battery cell level;
a test scene of a battery module level;
battery system level test scenario.
In some embodiments of the present invention, in some embodiments,
the test scene of the battery cell level comprises at least one of the following: a battery cell short circuit test scene and a battery cell overcharge test scene;
The test scene of the battery module level comprises at least one of the following: heating a test scene of the battery module and needling the test scene of the battery module;
the test scenario of the battery system level includes at least one of: the method comprises the following steps of a battery system overcharge test scene, a battery system immersion test scene, a battery system ball impact test scene and a battery system high-voltage loop electric connection untwisting test scene.
In some embodiments, after the determining the thermal runaway alarm threshold for the cell characteristic parameter, the method further comprises:
under a verification scene, obtaining a battery cell characteristic parameter value of the battery cell characteristic parameter when thermal runaway occurs;
and verifying the thermal runaway alarm threshold of the battery cell characteristic parameter according to the magnitude relation between the obtained battery cell characteristic parameter value and the thermal runaway alarm threshold of the battery cell characteristic parameter.
In some embodiments, the verifying the thermal runaway alarm threshold of the cell characteristic parameter according to the magnitude relation between the obtained cell characteristic parameter value and the thermal runaway alarm threshold of the cell characteristic parameter includes:
under the condition that the battery cell characteristic parameter is battery cell temperature, battery cell voltage or battery cell temperature rise slope, if the obtained battery cell characteristic parameter value is larger than a thermal runaway alarm threshold value of the battery cell characteristic parameter, determining that the thermal runaway alarm threshold value of the battery cell characteristic parameter passes the verification; otherwise, determining that the verification of the thermal runaway alarm threshold value of the battery cell characteristic parameter is not passed.
In a second aspect, embodiments of the present disclosure provide a battery thermal runaway alarm threshold determination device, the device comprising:
the first obtaining module is used for detecting the characteristic parameters of the battery cells when thermal runaway occurs in a plurality of test scenes so as to obtain a parameter value group; the parameter value group comprises cell characteristic parameter values of the cell characteristic parameters when thermal runaway occurs in each test scene;
and the determining module is used for determining a thermal runaway alarm threshold value of the battery cell characteristic parameter according to the parameter value set.
In some embodiments, the determining module includes:
the screening submodule is used for screening one cell characteristic parameter value in the parameter value set as a reference value of the cell characteristic parameter according to a screening rule matched with the cell characteristic parameter;
and the determining submodule is used for determining a thermal runaway alarm threshold value of the battery cell characteristic parameter according to the reference value of the battery cell characteristic parameter.
In some embodiments, the screening submodule is specifically configured to:
and screening the cell characteristic parameter value with the smallest value from the parameter value group as the reference value of the cell characteristic parameter under the condition that the cell characteristic parameter is the cell temperature, the cell voltage or the cell temperature rise slope.
In some embodiments, the apparatus further comprises:
the sending module is used for sending thermal runaway configuration information to the vehicle after determining the thermal runaway alarm threshold value of the battery cell characteristic parameter according to the parameter value set;
the thermal runaway configuration information is used for indicating the vehicle to output a thermal runaway alarm signal under the condition that a preset condition is met, and the preset condition is related to a thermal runaway alarm threshold value of the battery cell characteristic parameter.
In some embodiments, the number of the cell characteristic parameters is at least three, and the at least three cell characteristic parameters include a cell temperature, a cell voltage, and a cell temperature rise slope;
the preset conditions include at least one of the following:
the temperature value of the battery cell is larger than the thermal runaway alarm threshold value of the temperature of the battery cell, and the temperature rise slope value of the battery cell is larger than the thermal runaway alarm threshold value of the temperature rise slope of the battery cell;
the temperature rise slope value of the battery cell is larger than the thermal runaway alarm threshold value of the temperature rise slope of the battery cell, and the voltage value of the battery cell is smaller than the thermal runaway alarm threshold value of the voltage of the battery cell;
the temperature value of the battery cell is larger than a thermal runaway alarm threshold value of the temperature of the battery cell, and the voltage acquisition of the battery cell fails;
the battery cell voltage value is higher than a thermal runaway alarm threshold value of the battery cell voltage, and the duration that the battery cell current value is greater than or equal to a preset duration.
In some embodiments, the plurality of test scenarios includes at least one of:
a test scene of the battery cell level;
a test scene of a battery module level;
battery system level test scenario.
In some embodiments of the present invention, in some embodiments,
the test scene of the battery cell level comprises at least one of the following: a battery cell short circuit test scene and a battery cell overcharge test scene;
the test scene of the battery module level comprises at least one of the following: heating a test scene of the battery module and needling the test scene of the battery module;
the test scenario of the battery system level includes at least one of: the method comprises the following steps of a battery system overcharge test scene, a battery system immersion test scene, a battery system ball impact test scene and a battery system high-voltage loop electric connection untwisting test scene.
In some embodiments, the apparatus further comprises:
the second obtaining module is used for obtaining the cell characteristic parameter value of the cell characteristic parameter when thermal runaway occurs in a verification scene after determining the thermal runaway alarm threshold value of the cell characteristic parameter;
and the verification module is used for verifying the thermal runaway alarm threshold of the battery cell characteristic parameter according to the magnitude relation between the obtained battery cell characteristic parameter value and the thermal runaway alarm threshold of the battery cell characteristic parameter.
In some embodiments, the verification module is specifically configured to:
under the condition that the battery cell characteristic parameter is battery cell temperature, battery cell voltage or battery cell temperature rise slope, if the obtained battery cell characteristic parameter value is larger than a thermal runaway alarm threshold value of the battery cell characteristic parameter, determining that the thermal runaway alarm threshold value of the battery cell characteristic parameter passes the verification; otherwise, determining that the verification of the thermal runaway alarm threshold value of the battery cell characteristic parameter is not passed.
In a third aspect, embodiments of the present disclosure provide a battery thermal runaway alarm threshold determination device comprising a processor, a memory, a computer program stored on the memory and executable on the processor, which when executed by the processor, implements the steps of the battery thermal runaway alarm threshold determination method described above.
In a fourth aspect, embodiments of the present disclosure provide a computer readable storage medium having a computer program stored thereon, which when executed by a processor, implements the steps of the battery thermal runaway alarm threshold determination method described above.
In the embodiment of the disclosure, the cell characteristic parameters when thermal runaway occurs in a plurality of test scenes can be detected to obtain the parameter value set, and the cell characteristic parameter values of the cell characteristic parameters when thermal runaway occurs in each test scene can be included in the parameter value set, so that the parameter value set can reflect the actual parameter values of the cell characteristic parameters when thermal runaway occurs in various test scenes. And then, according to the parameter value group, determining a thermal runaway alarm threshold value of the battery cell characteristic parameter, wherein the determined thermal runaway alarm threshold value of the battery cell characteristic parameter can cover the thermal runaway conditions in all test scenes. Compared with the condition that the thermal runaway alarm threshold value is determined according to manual experience in the prior art, the embodiment of the disclosure can determine the thermal runaway alarm threshold value with ensured accuracy and reliability based on the parameter value set obtained in the actual test scene, so that the thermal runaway alarm signal can be reliably sent in time.
Drawings
FIG. 1 is a flow chart of a battery thermal runaway alarm threshold determination method provided by an embodiment of the present disclosure;
FIG. 2 is a block diagram of a battery thermal runaway alarm threshold determination device provided by an embodiment of the present disclosure;
fig. 3 is a schematic structural view of a battery thermal runaway alarm threshold determination apparatus provided by an embodiment of the present disclosure.
Detailed Description
The following description of the technical solutions in the embodiments of the present disclosure will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are some embodiments of the present disclosure, but not all embodiments. All other embodiments, which are derived by a person of ordinary skill in the art from the embodiments in the disclosure without creative efforts, are within the protection scope of the present disclosure.
A method for determining a thermal runaway alarm threshold of a battery provided by an embodiment of the present disclosure will be first described.
It should be noted that the battery thermal runaway alarm threshold determination method provided by the embodiment of the present disclosure may be applied to a battery thermal runaway alarm threshold determination apparatus. Specifically, the battery thermal runaway alarm threshold determining device may be a server, and of course, the battery thermal runaway alarm threshold determining device may also be other electronic devices with computing and processing capabilities, which are not listed here.
Referring to fig. 1, a flowchart of a battery thermal runaway alarm threshold determination method provided by an embodiment of the present disclosure is shown. As shown in fig. 1, the method comprises the steps of:
Here, "multiple" in multiple test scenarios may be five, eight, ten, twelve, or other numbers, which are not listed here.
In general, a battery system in a vehicle may include a battery pack and a battery management system (Battery Management System, BMS) for managing the battery pack; the battery pack can comprise a battery module, a shell and a thermal management system, wherein the battery module can be formed by combining a plurality of battery cells in a serial-parallel connection mode.
Prior to performing step 101, historical vehicle accident case information may be counted, for example, between 2015, 1 and 2019, 3. As can be seen from statistics of the case information of the vehicle accident, the situations of the safety failure of the battery system mainly include: the reasons for the safety failure of the battery system are mainly as follows, as can be known from the analysis of the case information of the vehicle accident, such as charging spontaneous combustion, spontaneous combustion in running, water immersion spontaneous combustion, collision spontaneous combustion and the like: internal short circuit of the battery cell, overcharge of the battery system, failure of the battery management system, electrical failure of the battery system, sealing failure of the battery system structure, structural strength failure of the battery system and the like.
Before step 101 is performed, fault tree analysis may be performed on the battery system from a safety design perspective, specifically, from a part to a system level, and safety design checking may be performed on the battery system from an electrical safety, a mechanical safety, a chemical safety, and a functional safety perspective, so as to comb out main control factors of thermal runaway safety, where the main control factors may include safety of a battery cell, safety of a battery module, sealing of a thermal management system, sealing of a battery box, safety of a battery management system, electrical safety of the battery system, bonding strength of the battery system, and the like.
Next, in combination with the analysis result obtained from the vehicle accident case information and the fault tree analysis result of the battery system, it is possible to determine the conditions in which thermal runaway is liable to occur, which are mainly: cell short circuit, cell overcharging, battery module heating, battery module needling, battery system overcharging, battery system soaking, battery system ball striking, battery system high-voltage loop electric connection back-twist and the like.
After determining the above-described condition in which thermal runaway is likely to occur, a plurality of test scenarios in step 101 may be determined according to the determined condition. Specifically, the plurality of test scenarios may include at least one of:
A test scene of the battery cell level;
a test scene of a battery module level;
battery system level test scenario.
In some embodiments of the present invention, in some embodiments,
the test scenario of the cell level may include at least one of: a battery cell short circuit test scene and a battery cell overcharge test scene;
the test scenario of the battery module level may include at least one of: heating a test scene of the battery module and needling the test scene of the battery module;
the test scenario of the battery system hierarchy may include at least one of: the method comprises the following steps of a battery system overcharge test scene, a battery system immersion test scene, a battery system ball impact test scene and a battery system high-voltage loop electric connection untwisting test scene.
For each of the plurality of test scenarios, a vehicle test may be performed to switch the vehicle from a state in which no thermal runaway occurs to a state in which thermal runaway occurs, and for each test scenario, detection of the cell characteristic parameter is performed separately to obtain a cell characteristic parameter value of the cell characteristic parameter when thermal runaway occurs in each test scenario, so as to obtain a parameter value set composed of the obtained plurality of cell characteristic parameter values. It should be noted that the cell characteristic parameters and the parameter value sets may be in a one-to-one correspondence, that is, the number of cell characteristic parameters is the same as the number of parameter value sets.
In some embodiments, step 102 may include:
according to a screening rule matched with the battery cell characteristic parameters, screening one battery cell characteristic parameter value in the parameter value group as a reference value of the battery cell characteristic parameters;
and determining a thermal runaway alarm threshold of the battery cell characteristic parameter according to the reference value of the battery cell characteristic parameter.
Here, the cell characteristic parameter may be a cell temperature, a cell voltage, or a cell temperature rise slope.
Specifically, the cell temperature may be detected by a temperature sensor; the cell voltage can be detected by a voltage sensor; the temperature rise slope of the battery cell can be obtained by processing the temperature of the battery cell detected by the temperature sensor, and the temperature rise slope of the battery cell can represent the rising degree of the temperature value of the battery cell in unit time. It is understood that the three physical quantities of the cell temperature, the cell voltage and the cell temperature rise slope can effectively characterize the cell characteristics when thermal runaway occurs.
It should be noted that the cell characteristic parameter may also be a cell current or other characteristic parameters, which are not listed here.
In some embodiments, selecting a cell characteristic parameter value in the set of parameter values as a reference value for the cell characteristic parameter according to a selection rule matching the cell characteristic parameter comprises:
And under the condition that the battery cell characteristic parameters are battery cell temperature, battery cell voltage or battery cell temperature rise slope, screening the battery cell characteristic parameter value with the smallest value in the parameter value group as a reference value of the battery cell characteristic parameters.
Specifically, assuming that the characteristic parameter of the battery cell is a battery cell temperature, and the parameter value set of the characteristic parameter of the battery cell includes 78 degrees celsius, 79 degrees celsius, 80 degrees celsius and 82 degrees celsius, the 78 degrees celsius can be screened out from the parameter value set, and the 78 degrees celsius is used as a reference value of the battery cell temperature.
Therefore, the embodiment can conveniently screen and obtain the reference value of the characteristic parameter of the battery cell.
Of course, the specific implementation manner of determining the reference value of the cell characteristic parameter through the screening operation is not limited to this, and in the case that the cell characteristic parameter is a parameter other than the cell temperature, the cell voltage and the cell temperature rise slope, the screening process may also be to screen the cell characteristic parameter value with the largest value as the reference value of the cell characteristic parameter, which only needs to ensure that the finally screened reference value of the cell characteristic parameter can cover the thermal runaway condition in all test scenarios.
After the reference value of the battery cell characteristic parameter is obtained, the reference value of the battery cell characteristic parameter can be directly used as a thermal runaway alarm threshold value of the battery cell characteristic parameter; alternatively, the reference value of the cell characteristic parameter may be multiplied by the safety coefficient, and the resulting product may be used as a thermal runaway alarm threshold for the cell characteristic parameter. Specifically, the safety factor may be 0.8, 0.85, 0.9 or other positive numbers less than 1, which are not listed here.
In the embodiment of the disclosure, the cell characteristic parameters when thermal runaway occurs in a plurality of test scenes can be detected to obtain the parameter value set, and the cell characteristic parameter values of the cell characteristic parameters when thermal runaway occurs in each test scene can be included in the parameter value set, so that the parameter value set can reflect the actual parameter values of the cell characteristic parameters when thermal runaway occurs in various test scenes. And then, according to the parameter value group, determining a thermal runaway alarm threshold value of the battery cell characteristic parameter, wherein the determined thermal runaway alarm threshold value of the battery cell characteristic parameter can cover the thermal runaway conditions in all test scenes. Compared with the condition that the thermal runaway alarm threshold value is determined according to manual experience in the prior art, the embodiment of the disclosure can determine the thermal runaway alarm threshold value with ensured accuracy and reliability based on the parameter value set obtained in the actual test scene, so that the thermal runaway alarm signal can be reliably sent in time.
In some embodiments, after determining the thermal runaway warning threshold for the cell characteristic parameter from the set of parameter values, the method further comprises:
transmitting thermal runaway configuration information to the vehicle;
The thermal runaway configuration information is used for indicating the vehicle to output a thermal runaway alarm signal under the condition that the preset condition is met, and the preset condition is related to a thermal runaway alarm threshold of the battery cell characteristic parameter.
Specifically, the number of the battery cell characteristic parameters is at least three, and the at least three battery cell characteristic parameters comprise a battery cell temperature, a battery cell voltage and a battery cell temperature rise slope. That is, one of the at least three cell characteristic parameters is a cell temperature, another of the at least three cell characteristic parameters is a cell voltage, and yet another of the at least three cell characteristic parameters is a cell temperature rise slope.
The preset condition may include at least one of:
the temperature value of the battery cell is larger than the thermal runaway alarm threshold value of the temperature of the battery cell, and the temperature rise slope value of the battery cell is larger than the thermal runaway alarm threshold value of the temperature rise slope of the battery cell;
the temperature rise slope value of the battery cell is larger than the thermal runaway alarm threshold value of the temperature rise slope of the battery cell, and the voltage value of the battery cell is smaller than the thermal runaway alarm threshold value of the voltage of the battery cell;
the temperature value of the battery cell is larger than a thermal runaway alarm threshold value of the temperature of the battery cell, and the voltage acquisition of the battery cell fails;
the battery cell voltage value is higher than a thermal runaway alarm threshold value of the battery cell voltage, and the duration that the battery cell current value is greater than or equal to a preset duration.
Here, the preset value may be 1 amp, and the preset time period may be 30 seconds, 1 minute or 2 minutes, and of course, the preset value and the preset time period are not limited thereto, and may be specifically determined according to actual situations, which is not limited in any way by the embodiments of the present disclosure.
Here, the thermal runaway configuration information may carry a thermal runaway alarm threshold for the temperature of the battery cell, a thermal runaway alarm threshold for the slope of the temperature rise of the battery cell, and a thermal runaway alarm threshold for the voltage of the battery cell. In the running process, the vehicle can detect the temperature of the battery cell, the voltage of the battery cell and the temperature rise slope of the battery cell at regular or irregular time.
Under the condition that the temperature value of the battery cell is larger than the thermal runaway alarm threshold value of the temperature of the battery cell and the temperature rise slope value of the battery cell is larger than the thermal runaway alarm threshold value of the temperature rise slope of the battery cell, both the temperature value of the battery cell and the temperature rise slope value of the battery cell can be considered to reach alarm conditions; when the temperature rise slope value of the battery cell is larger than the thermal runaway alarm threshold value of the temperature rise slope of the battery cell, and the voltage value of the battery cell is smaller than the thermal runaway alarm threshold value of the voltage of the battery cell, the temperature rise slope value of the battery cell and the voltage value of the battery cell can be considered to reach alarm conditions; when the temperature value of the battery cell is larger than the thermal runaway alarm threshold value of the temperature of the battery cell and the acquisition of the voltage of the battery cell fails, the temperature value of the battery cell can be considered to reach an alarm condition, and the voltage value of the battery cell cannot be acquired at all; when the battery cell voltage value is higher than the thermal runaway alarm threshold of the battery cell voltage and the duration that the battery cell current value is greater than or equal to the preset duration, the battery cell voltage value can be considered to reach the alarm condition and the battery cell is in an overcharged state. Under any of the four conditions, a thermal runaway alarm threshold can be output, so that a driver and a passenger take measures to cope with the thermal runaway in time, and the safety of the driver and the passenger is ensured.
In some embodiments, after determining the thermal runaway alarm threshold for the cell characteristic parameter, the method further comprises:
under a verification scene, obtaining a battery cell characteristic parameter value of a battery cell characteristic parameter when thermal runaway occurs;
and verifying the thermal runaway alarm threshold of the battery cell characteristic parameter according to the magnitude relation between the obtained battery cell characteristic parameter value and the thermal runaway alarm threshold of the battery cell characteristic parameter.
Here, the verification scenario includes, but is not limited to, a fire scenario, a wading scenario, and the like.
Specifically, according to the magnitude relation between the obtained battery cell characteristic parameter value and the thermal runaway alarm threshold of the battery cell characteristic parameter, the thermal runaway alarm threshold of the battery cell characteristic parameter is verified, which comprises the following steps:
under the condition that the battery cell characteristic parameter is battery cell temperature, battery cell voltage or battery cell temperature rise slope, if the obtained battery cell characteristic parameter value is larger than the thermal runaway alarm threshold of the battery cell characteristic parameter, determining that the verification of the thermal runaway alarm threshold of the battery cell characteristic parameter is passed; otherwise, determining that the verification of the thermal runaway alarm threshold value of the battery cell characteristic parameter is not passed.
Assuming that the cell characteristic parameter is a cell temperature, it can be understood that under normal conditions, the cell temperature value when thermal runaway occurs should be greater than the thermal runaway alarm threshold of the cell temperature determined before, and then under a verification scenario, the cell temperature when thermal runaway occurs is collected, so that after the cell temperature value is obtained, the obtained cell temperature value can be compared with the thermal runaway alarm threshold of the cell temperature. If the comparison result shows that the obtained battery cell temperature value is larger than the thermal runaway alarm threshold value of the battery cell temperature, which shows that the comparison result is consistent with the normal condition, the verification of the thermal runaway alarm threshold value of the battery cell temperature can be determined to pass; otherwise, it may be determined that the verification of the thermal runaway alarm threshold for the cell temperature is not passed.
Therefore, the verification of the thermal runaway alarm threshold value of the battery cell characteristic parameter can be conveniently and reliably realized through the mode.
Optionally, in a verification scenario, a plurality of cell temperature values when thermal runaway occurs may be obtained, and if each of the obtained plurality of cell temperature values is greater than a thermal runaway alarm threshold of the cell temperature, verification passing of the thermal runaway alarm threshold of the cell temperature may be determined; otherwise, it may be determined that the verification of the thermal runaway alarm threshold for the cell temperature is not passed.
It can be seen that in embodiments of the present disclosure, the thermal runaway alarm threshold of the cell characteristic parameter may be verified to ensure the accuracy and reliability of the thermal runaway alarm threshold ultimately used on the vehicle.
In summary, in the embodiments of the present disclosure, a relatively accurate thermal runaway alarm threshold may be obtained through test data under a plurality of test scenarios, and the accuracy of the thermal runaway alarm threshold used on the vehicle may be further ensured through verification of the thermal runaway alarm threshold, so that when thermal runaway occurs, the battery management system of the vehicle may timely and reliably send out a thermal runaway alarm signal.
The alarm threshold determining apparatus provided by the embodiments of the present disclosure is described below.
Referring to fig. 2, a block diagram of a battery thermal runaway alarm threshold determination device 200 provided by an embodiment of the present disclosure is shown. As shown in fig. 2, the battery thermal runaway alarm threshold determination device 200 includes:
a first obtaining module 201, configured to detect a characteristic parameter of a battery cell when thermal runaway occurs in a plurality of test scenarios, so as to obtain a parameter value set; the parameter value group comprises cell characteristic parameter values of cell characteristic parameters when thermal runaway occurs in each test scene;
a determining module 202 is configured to determine a thermal runaway alarm threshold for the characteristic parameter of the electrical cell based on the set of reference values.
In some embodiments, the determination module 202 includes:
the screening submodule is used for screening one cell characteristic parameter value in the parameter value group as a reference value of the cell characteristic parameter according to a screening rule matched with the cell characteristic parameter;
and the determining submodule is used for determining a thermal runaway alarm threshold value of the battery cell characteristic parameter according to the reference value of the battery cell characteristic parameter.
In some embodiments, the screening submodule is specifically configured to:
and under the condition that the battery cell characteristic parameters are battery cell temperature, battery cell voltage or battery cell temperature rise slope, screening the battery cell characteristic parameter value with the smallest value in the parameter value group as a reference value of the battery cell characteristic parameters.
In some embodiments, the battery thermal runaway alarm threshold determination device 200 further comprises:
the sending module is used for sending thermal runaway configuration information to the vehicle after determining the thermal runaway alarm threshold value of the battery cell characteristic parameter according to the parameter value group;
the thermal runaway configuration information is used for indicating the vehicle to output a thermal runaway alarm signal under the condition that the preset condition is met, and the preset condition is related to a thermal runaway alarm threshold of the battery cell characteristic parameter.
In some embodiments, the number of cell characteristic parameters is at least three, the at least three cell characteristic parameters including cell temperature, cell voltage, and cell temperature rise slope;
the preset conditions include at least one of the following:
the temperature value of the battery cell is larger than the thermal runaway alarm threshold value of the temperature of the battery cell, and the temperature rise slope value of the battery cell is larger than the thermal runaway alarm threshold value of the temperature rise slope of the battery cell;
the temperature rise slope value of the battery cell is larger than the thermal runaway alarm threshold value of the temperature rise slope of the battery cell, and the voltage value of the battery cell is smaller than the thermal runaway alarm threshold value of the voltage of the battery cell;
the temperature value of the battery cell is larger than a thermal runaway alarm threshold value of the temperature of the battery cell, and the voltage acquisition of the battery cell fails;
the battery cell voltage value is higher than a thermal runaway alarm threshold value of the battery cell voltage, and the duration that the battery cell current value is greater than or equal to a preset duration.
In some embodiments, the plurality of test scenarios includes at least one of:
a test scene of the battery cell level;
a test scene of a battery module level;
battery system level test scenario.
In some embodiments of the present invention, in some embodiments,
the test scenario of the cell level includes at least one of the following: a battery cell short circuit test scene and a battery cell overcharge test scene;
the test scene of the battery module level comprises at least one of the following: heating a test scene of the battery module and needling the test scene of the battery module;
the test scenario of the battery system hierarchy includes at least one of: the method comprises the following steps of a battery system overcharge test scene, a battery system immersion test scene, a battery system ball impact test scene and a battery system high-voltage loop electric connection untwisting test scene.
In some embodiments, the battery thermal runaway alarm threshold determination device 200 further comprises:
the second obtaining module is used for obtaining the cell characteristic parameter value of the cell characteristic parameter when thermal runaway occurs in a verification scene after determining the thermal runaway alarm threshold value of the cell characteristic parameter;
and the verification module is used for verifying the thermal runaway alarm threshold of the battery cell characteristic parameter according to the magnitude relation between the obtained battery cell characteristic parameter value and the thermal runaway alarm threshold of the battery cell characteristic parameter.
In some embodiments, the verification module is specifically configured to:
under the condition that the battery cell characteristic parameter is battery cell temperature, battery cell voltage or battery cell temperature rise slope, if the obtained battery cell characteristic parameter value is larger than the thermal runaway alarm threshold of the battery cell characteristic parameter, determining that the verification of the thermal runaway alarm threshold of the battery cell characteristic parameter is passed; otherwise, determining that the verification of the thermal runaway alarm threshold value of the battery cell characteristic parameter is not passed.
Compared with the condition that the thermal runaway alarm threshold value is determined according to manual experience in the prior art, the embodiment of the disclosure can determine the thermal runaway alarm threshold value with ensured accuracy and reliability based on the parameter value set obtained in the actual test scene, so that the thermal runaway alarm signal can be reliably sent in time.
A battery thermal runaway alarm threshold value determining apparatus provided by an embodiment of the present disclosure is explained below.
Referring to fig. 3, a schematic diagram of a battery thermal runaway alarm threshold determination apparatus 300 provided by an embodiment of the present disclosure is shown. As shown in fig. 3, the battery thermal runaway alarm threshold determination device 300 includes: a processor 301, a transceiver 302, a memory 303, a user interface 304 and a bus interface.
A processor 301 for reading the program in the memory 303, and performing the following procedures:
detecting characteristic parameters of the battery cell when thermal runaway occurs in a plurality of test scenes to obtain a parameter value group; the parameter value group comprises cell characteristic parameter values of cell characteristic parameters when thermal runaway occurs in each test scene;
and determining a thermal runaway alarm threshold of the characteristic parameters of the battery cells according to the parameter value group.
In fig. 3, a bus architecture may comprise any number of interconnected buses and bridges, with various circuits of the one or more processors, represented in particular by processor 301, and the memory, represented in memory 303, being linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 302 may be a number of elements, i.e. comprising a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium. The user interface 304 may also be an interface capable of interfacing with an inscribed desired device for a different user device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.
The processor 301 is responsible for managing the bus architecture and general processing, and the memory 303 may store data used by the processor 301 in performing operations.
In some embodiments, the processor 301 is specifically configured to:
according to a screening rule matched with the battery cell characteristic parameters, screening one battery cell characteristic parameter value in the parameter value group as a reference value of the battery cell characteristic parameters;
and determining a thermal runaway alarm threshold of the battery cell characteristic parameter according to the reference value of the battery cell characteristic parameter.
In some embodiments, the processor 301 is specifically configured to:
and under the condition that the battery cell characteristic parameters are battery cell temperature, battery cell voltage or battery cell temperature rise slope, screening the battery cell characteristic parameter value with the smallest value in the parameter value group as a reference value of the battery cell characteristic parameters.
In some embodiments, the processor 301 is further configured to:
after determining a thermal runaway alarm threshold of the battery cell characteristic parameter according to the parameter value set, sending thermal runaway configuration information to the vehicle;
the thermal runaway configuration information is used for indicating the vehicle to output a thermal runaway alarm signal under the condition that the preset condition is met, and the preset condition is related to a thermal runaway alarm threshold of the battery cell characteristic parameter.
In some embodiments, the number of cell characteristic parameters is at least three, the at least three cell characteristic parameters including cell temperature, cell voltage, and cell temperature rise slope;
The preset conditions include at least one of the following:
the temperature value of the battery cell is larger than the thermal runaway alarm threshold value of the temperature of the battery cell, and the temperature rise slope value of the battery cell is larger than the thermal runaway alarm threshold value of the temperature rise slope of the battery cell;
the temperature rise slope value of the battery cell is larger than the thermal runaway alarm threshold value of the temperature rise slope of the battery cell, and the voltage value of the battery cell is smaller than the thermal runaway alarm threshold value of the voltage of the battery cell;
the temperature value of the battery cell is larger than a thermal runaway alarm threshold value of the temperature of the battery cell, and the voltage acquisition of the battery cell fails;
the battery cell voltage value is higher than a thermal runaway alarm threshold value of the battery cell voltage, and the duration that the battery cell current value is greater than or equal to a preset duration.
In some embodiments, the plurality of test scenarios includes at least one of:
a test scene of the battery cell level;
a test scene of a battery module level;
battery system level test scenario.
In some embodiments of the present invention, in some embodiments,
the test scenario of the cell level includes at least one of the following: a battery cell short circuit test scene and a battery cell overcharge test scene;
the test scene of the battery module level comprises at least one of the following: heating a test scene of the battery module and needling the test scene of the battery module;
the test scenario of the battery system hierarchy includes at least one of: the method comprises the following steps of a battery system overcharge test scene, a battery system immersion test scene, a battery system ball impact test scene and a battery system high-voltage loop electric connection untwisting test scene.
In some embodiments, the processor 301 is further configured to:
after determining a thermal runaway alarm threshold value of the battery cell characteristic parameter, obtaining a battery cell characteristic parameter value of the battery cell characteristic parameter when thermal runaway occurs in a verification scene;
and verifying the thermal runaway alarm threshold of the battery cell characteristic parameter according to the magnitude relation between the obtained battery cell characteristic parameter value and the thermal runaway alarm threshold of the battery cell characteristic parameter.
In some embodiments, the processor 301 is specifically configured to:
under the condition that the battery cell characteristic parameter is battery cell temperature, battery cell voltage or battery cell temperature rise slope, if the obtained battery cell characteristic parameter value is larger than the thermal runaway alarm threshold of the battery cell characteristic parameter, determining that the verification of the thermal runaway alarm threshold of the battery cell characteristic parameter is passed; otherwise, determining that the verification of the thermal runaway alarm threshold value of the battery cell characteristic parameter is not passed.
Compared with the condition that the thermal runaway alarm threshold value is determined according to manual experience in the prior art, the embodiment of the disclosure can determine the thermal runaway alarm threshold value with ensured accuracy and reliability based on the parameter value set obtained in the actual test scene, so that the thermal runaway alarm signal can be reliably sent in time.
Embodiments of the present disclosure further provide a computer readable storage medium, on which a computer program is stored, where the computer program, when executed by the processor 301, implements each process in the above embodiments of the battery thermal runaway alarm threshold determining method, and can achieve the same technical effects, and in order to avoid repetition, is not described herein again. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk.
The foregoing is merely specific embodiments of the disclosure, but the protection scope of the disclosure is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the disclosure, and it is intended to cover the scope of the disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (10)
1. A method for determining a thermal runaway warning threshold for a battery, the method comprising:
detecting characteristic parameters of the battery cell when thermal runaway occurs in a plurality of test scenes to obtain a parameter value group; the parameter value group comprises cell characteristic parameter values of the cell characteristic parameters when thermal runaway occurs in each test scene;
Determining a thermal runaway alarm threshold of the battery cell characteristic parameter according to the parameter value set, wherein the thermal runaway alarm threshold comprises:
screening one cell characteristic parameter value in the parameter value set as a reference value of the cell characteristic parameter according to a screening rule matched with the cell characteristic parameter;
determining a thermal runaway alarm threshold of the battery cell characteristic parameter according to the reference value of the battery cell characteristic parameter;
the step of screening one cell characteristic parameter value in the parameter value set as a reference value of the cell characteristic parameter according to a screening rule matched with the cell characteristic parameter comprises the following steps: the battery cell characteristic parameters are battery cell temperature, battery cell voltage or battery cell temperature rise slope, and the battery cell characteristic parameter value with the smallest value in the parameter value group is screened to be used as a reference value of the battery cell characteristic parameters;
after the thermal runaway alarm threshold value of the battery cell characteristic parameter is determined, under a verification scene, obtaining a battery cell characteristic parameter value of the battery cell characteristic parameter when thermal runaway occurs; and verifying the thermal runaway alarm threshold of the battery cell characteristic parameter according to the magnitude relation between the obtained battery cell characteristic parameter value and the thermal runaway alarm threshold of the battery cell characteristic parameter.
2. The method of claim 1, wherein after determining the thermal runaway warning threshold for the cell characteristic parameter from the set of parameter values, the method further comprises:
transmitting thermal runaway configuration information to the vehicle;
the thermal runaway configuration information is used for indicating the vehicle to output a thermal runaway alarm signal under the condition that a preset condition is met, and the preset condition is related to a thermal runaway alarm threshold value of the battery cell characteristic parameter.
3. The method of claim 2, wherein the number of cell characteristic parameters is at least three, the at least three cell characteristic parameters comprising cell temperature, cell voltage, and cell temperature rise slope;
the preset conditions include at least one of the following:
the temperature value of the battery cell is larger than the thermal runaway alarm threshold value of the temperature of the battery cell, and the temperature rise slope value of the battery cell is larger than the thermal runaway alarm threshold value of the temperature rise slope of the battery cell;
the temperature rise slope value of the battery cell is larger than the thermal runaway alarm threshold value of the temperature rise slope of the battery cell, and the voltage value of the battery cell is smaller than the thermal runaway alarm threshold value of the voltage of the battery cell;
the temperature value of the battery cell is larger than a thermal runaway alarm threshold value of the temperature of the battery cell, and the voltage acquisition of the battery cell fails;
The battery cell voltage value is higher than a thermal runaway alarm threshold value of the battery cell voltage, and the duration that the battery cell current value is greater than or equal to a preset duration.
4. The method of claim 1, wherein the plurality of test scenarios comprises at least one of:
a test scene of the battery cell level;
a test scene of a battery module level;
battery system level test scenario.
5. The method of claim 4, wherein the step of determining the position of the first electrode is performed,
the test scene of the battery cell level comprises at least one of the following: a battery cell short circuit test scene and a battery cell overcharge test scene;
the test scene of the battery module level comprises at least one of the following: heating a test scene of the battery module and needling the test scene of the battery module;
the test scenario of the battery system level includes at least one of: the method comprises the following steps of a battery system overcharge test scene, a battery system immersion test scene, a battery system ball impact test scene and a battery system high-voltage loop electric connection untwisting test scene.
6. The method according to claim 1, wherein verifying the thermal runaway alarm threshold of the cell characteristic parameter according to the magnitude relation between the obtained cell characteristic parameter value and the thermal runaway alarm threshold of the cell characteristic parameter comprises:
Under the condition that the battery cell characteristic parameter is battery cell temperature, battery cell voltage or battery cell temperature rise slope, if the obtained battery cell characteristic parameter value is larger than a thermal runaway alarm threshold value of the battery cell characteristic parameter, determining that the thermal runaway alarm threshold value of the battery cell characteristic parameter passes the verification; otherwise, determining that the verification of the thermal runaway alarm threshold value of the battery cell characteristic parameter is not passed.
7. A battery thermal runaway alarm threshold determination device, the device comprising:
the first obtaining module is used for detecting the characteristic parameters of the battery cells when thermal runaway occurs in a plurality of test scenes so as to obtain a parameter value group; the parameter value group comprises cell characteristic parameter values of the cell characteristic parameters when thermal runaway occurs in each test scene;
the determining module is used for determining a thermal runaway alarm threshold value of the battery cell characteristic parameter according to the parameter value set;
the determining module includes:
the screening submodule is used for screening one cell characteristic parameter value in the parameter value set as a reference value of the cell characteristic parameter according to a screening rule matched with the cell characteristic parameter; the battery cell characteristic parameters are battery cell temperature, battery cell voltage or battery cell temperature rise slope, and battery cell characteristic parameter values with the smallest values in the parameter value group are screened to serve as reference values of the battery cell characteristic parameters;
The determining submodule is used for determining a thermal runaway alarm threshold value of the battery cell characteristic parameter according to the reference value of the battery cell characteristic parameter;
the second obtaining module is used for obtaining the cell characteristic parameter value of the cell characteristic parameter when thermal runaway occurs in a verification scene after determining the thermal runaway alarm threshold value of the cell characteristic parameter;
and the verification module is used for verifying the thermal runaway alarm threshold of the battery cell characteristic parameter according to the magnitude relation between the obtained battery cell characteristic parameter value and the thermal runaway alarm threshold of the battery cell characteristic parameter.
8. The apparatus of claim 7, wherein the apparatus further comprises:
the sending module is used for sending thermal runaway configuration information to the vehicle after determining the thermal runaway alarm threshold value of the battery cell characteristic parameter according to the parameter value set;
the thermal runaway configuration information is used for indicating the vehicle to output a thermal runaway alarm signal under the condition that a preset condition is met, and the preset condition is related to a thermal runaway alarm threshold value of the battery cell characteristic parameter.
9. A battery thermal runaway alarm threshold value determining apparatus, characterized by comprising a processor, a memory, a computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, implements the steps of the battery thermal runaway alarm threshold value determining method according to any one of claims 1 to 6.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the battery thermal runaway alarm threshold value determination method according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911148459.5A CN112824919B (en) | 2019-11-21 | 2019-11-21 | Battery thermal runaway alarm threshold determining method, device and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911148459.5A CN112824919B (en) | 2019-11-21 | 2019-11-21 | Battery thermal runaway alarm threshold determining method, device and equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112824919A CN112824919A (en) | 2021-05-21 |
| CN112824919B true CN112824919B (en) | 2023-06-13 |
Family
ID=75907353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911148459.5A Active CN112824919B (en) | 2019-11-21 | 2019-11-21 | Battery thermal runaway alarm threshold determining method, device and equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112824919B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114454774B (en) * | 2022-01-05 | 2024-01-05 | 重庆金康动力新能源有限公司 | Battery pack thermal runaway early warning system and method |
| CN117007993A (en) * | 2022-04-28 | 2023-11-07 | 华为技术有限公司 | Battery thermal runaway test system and test method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102176627A (en) * | 2011-02-10 | 2011-09-07 | 张佳宾 | Adaptive measurement and control system for charge-discharge process of integrated storage battery |
| CN105067215A (en) * | 2015-08-05 | 2015-11-18 | 合肥美的电冰箱有限公司 | Method and system for acquiring drop impact test data |
| CN107611513A (en) * | 2017-09-21 | 2018-01-19 | 公安部天津消防研究所 | A kind of method for monitoring lithium ion battery of electric automobile thermal runaway |
| CN107632262A (en) * | 2017-08-07 | 2018-01-26 | 北京长城华冠汽车科技股份有限公司 | A kind of detection method and device of power battery pack cycle life |
| WO2018041421A1 (en) * | 2016-09-02 | 2018-03-08 | Volkswagen Aktiengesellschaft | Method for determining the functional reliability of a battery |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004092756A1 (en) * | 2003-04-17 | 2004-10-28 | Hydrogenics Corporation | Alarm recovery system and method for fuel cell testing systems |
| US9618560B2 (en) * | 2015-07-01 | 2017-04-11 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Apparatus and method to monitor thermal runaway in a semiconductor device |
| CN107861065A (en) * | 2017-09-30 | 2018-03-30 | 中国汽车技术研究中心 | Thermal runaway test method for power battery test |
| CN109786872B (en) * | 2019-03-18 | 2020-12-08 | 北京航空航天大学 | Lithium ion battery thermal runaway early warning system and method |
| CN110261781A (en) * | 2019-06-12 | 2019-09-20 | 天津市捷威动力工业有限公司 | A kind of method for early warning of battery thermal runaway |
| CN110370984B (en) * | 2019-06-26 | 2020-11-13 | 清华大学 | Power battery thermal runaway early warning method |
-
2019
- 2019-11-21 CN CN201911148459.5A patent/CN112824919B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102176627A (en) * | 2011-02-10 | 2011-09-07 | 张佳宾 | Adaptive measurement and control system for charge-discharge process of integrated storage battery |
| CN105067215A (en) * | 2015-08-05 | 2015-11-18 | 合肥美的电冰箱有限公司 | Method and system for acquiring drop impact test data |
| WO2018041421A1 (en) * | 2016-09-02 | 2018-03-08 | Volkswagen Aktiengesellschaft | Method for determining the functional reliability of a battery |
| CN107632262A (en) * | 2017-08-07 | 2018-01-26 | 北京长城华冠汽车科技股份有限公司 | A kind of detection method and device of power battery pack cycle life |
| CN107611513A (en) * | 2017-09-21 | 2018-01-19 | 公安部天津消防研究所 | A kind of method for monitoring lithium ion battery of electric automobile thermal runaway |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112824919A (en) | 2021-05-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111413629B (en) | Short circuit monitoring method, system and device for single battery in power battery | |
| US9059486B2 (en) | Automatic crash battery discharge method | |
| EP2840401B1 (en) | Electric Storage- and controldevice, system and method | |
| CN112824919B (en) | Battery thermal runaway alarm threshold determining method, device and equipment | |
| US20080297303A1 (en) | Electrical disconnect system | |
| CN110376530A (en) | Battery internal short-circuit detection device and method | |
| CN111890988B (en) | Battery thermal runaway detection method and device, battery management system and vehicle | |
| CN109031138A (en) | A kind of safety evaluation method and device of power battery | |
| CN111913113A (en) | Method and device for identifying short circuit in electric core, storage medium and electronic equipment | |
| KR20180037708A (en) | Method and apparatus for managing battery | |
| CN112956103A (en) | Battery control method, apparatus and storage medium | |
| CN112485685A (en) | Power bearing capacity parameter determination method and device and electronic equipment | |
| CN113625692A (en) | Electric automobile battery security inspection system based on fault injection | |
| CN105098729A (en) | Intelligent lithium battery protection device and control method thereof | |
| KR101748644B1 (en) | Apparatus for simulating battery module | |
| CN113787914A (en) | Power battery monitoring method and device, server and storage medium | |
| Khan | ISO 26262 system level functional safety validation for battery management systems in automobiles | |
| CN116626492A (en) | Battery fault diagnosis method and device and vehicle | |
| JP7214979B2 (en) | Management device and failure judgment method | |
| CN115972982A (en) | Thermal runaway early warning method, device, equipment and readable storage medium | |
| EP3871919B1 (en) | Method and detection unit for detecting inhomogeneous cell performance of a battery system | |
| CN110116705B (en) | Vehicle checking method and device and vehicle | |
| CN112634569A (en) | Fire early warning method and device, electronic equipment and storage medium | |
| CN115675175A (en) | Battery internal short circuit detection and mitigation | |
| CN115047344A (en) | Power battery pack heat estimation method and device |
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 |