CN117629465A - Battery abnormality detection method, battery abnormality detection device, electronic device, vehicle, and storage medium - Google Patents
Battery abnormality detection method, battery abnormality detection device, electronic device, vehicle, and storage medium Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/16—Measuring force or stress, in general using properties of piezoelectric devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
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Abstract
The present disclosure provides a battery abnormality detection method, apparatus, electronic device, vehicle, and storage medium. The battery abnormality detection device includes: the pressure sensing unit is arranged at the bottom of the battery and at least partially covers the bottom surface of the battery and is configured to: acquiring pressure information of the bottom of the battery and generating an electric signal based on the pressure information; a signal conversion unit configured to: determining a battery bottom intrusion displacement based on the electrical signal; a data analysis unit configured to: and determining a battery bottom detection result based on the battery bottom intrusion displacement and a preset intrusion threshold. The battery abnormality detection device can effectively monitor quantitative characterization of deformation of the bottom of the power battery, detect the accumulated hidden injury of the bottom of the power battery for a long time in real time, and can be practically applied to electric automobiles.
Description
Technical Field
The disclosure relates to the technical field of batteries, and in particular relates to a battery abnormality detection method, a device, electronic equipment, a vehicle and a storage medium.
Background
With the rapid development of new energy automobile industry, the new energy automobile has higher and higher conservation amount, the conservation amount of the fuel automobile is reduced, and the living environment of people is improved. However, the new energy automobile is not a perfect automobile, and has certain safety problems, especially the battery is easy to generate thermal runaway, so that the automobile is damaged, and even the automobile is injured.
At present, the safety detection of the power battery is mostly carried out on abnormal changes of voltage, temperature, pressure and gas of the power battery, and the methods are mainly applied to overcharge, overheat and the like of the power battery, but the detection is not enough to ensure the safety of the power battery.
Disclosure of Invention
In view of the foregoing, an object of the present disclosure is to provide a battery abnormality detection method, a device, an electronic apparatus, a vehicle, and a storage medium.
Based on the above object, the present disclosure provides a battery abnormality detection device including:
the pressure sensing unit is arranged at the bottom of the battery and at least partially covers the bottom surface of the battery and is configured to: acquiring pressure information of the bottom of the battery and generating an electric signal based on the pressure information;
a signal conversion unit configured to: determining a battery bottom intrusion displacement based on the electrical signal;
a data analysis unit configured to: and determining a battery bottom detection result based on the battery bottom intrusion displacement and a preset intrusion threshold.
Optionally, the pressure sensing unit includes:
a film substrate;
a plurality of membrane pressure sensors arranged in an array on the membrane substrate;
and the protective layer is arranged on one side of the film pressure sensor, which is far away from the film substrate.
Optionally, at least two of the film pressure sensors are arranged in series in the row direction;
at least two rows of the film pressure sensors are arranged in parallel in the column direction.
The disclosure also provides a battery abnormality detection method, comprising:
acquiring pressure information of the bottom of the battery, and generating an electric signal based on the pressure information;
determining a battery bottom intrusion displacement based on the electrical signal;
and determining a battery bottom abnormal result based on the battery bottom intrusion displacement and a preset intrusion threshold.
Optionally, the determining the battery bottom intrusion displacement based on the electrical signal includes:
determining the intrusion displacement amount of the bottom of the battery based on the electric signal and the corresponding relation between the preset electric signal and displacement;
the corresponding relation between the preset electric signal and the displacement is obtained based on the calibration result of the film pressure sensing unit.
Optionally, the method further comprises:
determining a battery bottom anomaly location based on the electrical signal;
and determining the battery bottom abnormal result based on the battery bottom abnormal position.
Optionally, the determining the abnormal battery bottom result based on the battery bottom intrusion displacement and a preset intrusion threshold includes:
responding to the intrusion displacement amount of the bottom of the battery to be more than or equal to the intrusion threshold value, and judging whether the intrusion displacement amount of the bottom of the battery is caused by abnormal sensor signals;
and outputting a battery bottom abnormal result in response to the battery bottom intrusion displacement amount not being caused by the sensor signal abnormality.
Optionally, the method further comprises:
and determining an early warning level based on the abnormal result of the bottom of the battery, and outputting an early warning signal according to the early warning level.
The present disclosure also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing a method as claimed in any one of the preceding claims when executing the program.
The present disclosure also provides a vehicle including the battery abnormality detection apparatus as described in the above embodiment and the electronic device as described in the above embodiment.
The present disclosure also provides a non-transitory computer readable storage medium storing computer instructions for causing the computer to perform any of the methods described above.
As can be seen from the above, the battery abnormality detection method, apparatus, electronic device, vehicle and storage medium provided by the present disclosure, by disposing a pressure sensing unit at the bottom of a battery, detect pressure information at the bottom of the battery with the pressure sensing unit and convert the pressure information into an electrical signal; the electric signal output by the pressure sensing unit is converted into the battery bottom intrusion displacement through the signal conversion unit, and the battery bottom detection result is output through the data analysis unit based on the battery bottom intrusion displacement, so that whether the battery bottom is abnormal or not is judged. The battery abnormality detection device can effectively monitor quantitative characterization of deformation of the bottom of the power battery, detect the accumulated hidden injury of the bottom of the power battery for a long time in real time, and can be practically applied to electric automobiles.
Drawings
In order to more clearly illustrate the technical solutions of the present disclosure or related art, the drawings required for the embodiments or related art description will be briefly described below, and it is apparent that the drawings in the following description are only embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort to those of ordinary skill in the art.
Fig. 1 is a schematic structural diagram of a battery abnormality detection device according to an embodiment of the present disclosure;
FIG. 2 is a schematic cross-sectional view of a pressure sensing unit according to an embodiment of the disclosure;
FIG. 3 is a schematic diagram of an array arrangement of a membrane pressure sensor according to an embodiment of the disclosure;
fig. 4 is another schematic structural view of a battery abnormality detection device according to an embodiment of the present disclosure;
fig. 5 is a flowchart of a battery abnormality detection method according to an embodiment of the disclosure;
fig. 6 is another flow chart of a battery abnormality detection method according to an embodiment of the disclosure;
FIG. 7 is a schematic flow chart of a battery abnormality detection method according to an embodiment of the disclosure;
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the disclosure.
Detailed Description
For the purposes of promoting an understanding of the principles and advantages of the disclosure, reference will now be made to the embodiments illustrated in the drawings and specific language will be used to describe the same.
It should be noted that unless otherwise defined, technical or scientific terms used in the embodiments of the present disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which the present disclosure pertains. The terms "first," "second," and the like, as used in embodiments of the present disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
At present, for new energy automobiles, spontaneous combustion of the vehicle is an important safety problem, and the safety requirement for a power battery (battery pack) of the vehicle is high, so that the battery needs to be safely detected. As described in the background art, the safety detection of the battery is mainly performed on the conditions of overcharge, overheat and the like of the power battery, and is implemented by detecting abnormal changes of the voltage, temperature, pressure and gas of the battery. However, when the power battery is mounted on a vehicle, the bottom of the battery is usually suspended during mounting, so that the bottom of the battery cannot be detected, and further the safety problems caused by abuse of the bottom of the electric vehicle and long-term accumulated hidden injury of the bottom cannot be detected.
In view of the above, the embodiments of the present disclosure provide a battery abnormality detection device, which can detect the condition of the bottom of a battery, and further detect the safety problem caused by abuse of the bottom of an electric vehicle and long-term accumulated hidden injury of the bottom.
As shown in fig. 1, the battery abnormality detection device includes a pressure sensing unit 11, a signal conversion unit 12, and a data analysis unit 13.
Wherein the pressure sensing unit 11 is disposed at the bottom of the battery and at least partially covers the bottom surface of the battery, the pressure sensing unit 11 is configured to acquire pressure information of the bottom of the battery and generate an electrical signal based on the pressure information, and the pressure sensing unit 11 sends the generated electrical signal to the signal conversion unit 12. In this embodiment, the pressure sensing unit 11 is used for converting pressure information collected by the pressure sensing unit into an electrical signal. When an abnormality such as a bulge occurs in the bottom of the battery, the pressure thereof against the pressure sensing unit 11 increases, and the pressure sensing unit 11 converts the pressure information collected thereby into an electrical signal and transmits the electrical signal to the signal conversion unit 12.
The signal conversion unit 12 is connected with the pressure sensing unit 11, and the signal conversion unit 12 receives the electric signal sent by the pressure sensing unit 11, determines the intrusion displacement amount of the bottom of the battery based on the electric signal and sends the intrusion displacement amount to the data analysis unit 13. In this embodiment, the battery bottom intrusion displacement is the difference in height between the bulge of the battery bottom relative to the bulge of the battery bottom. The signal conversion unit 12 may convert the electrical signal into a battery bottom intrusion displacement amount, that is, a height difference between a bulge portion of the battery bottom with respect to a non-bulge portion.
The data analysis unit 13 is connected with the signal conversion unit 12, and the data analysis unit 13 receives the battery bottom intrusion displacement sent by the signal conversion unit 12 and determines a battery bottom detection result based on the battery bottom intrusion displacement and a preset intrusion threshold. In this embodiment, when the bulge at the bottom of the battery is smaller, the safety of the power battery may not be affected, and only when the bulge at the bottom of the battery reaches a certain level, the safety of the power battery may be affected. Therefore, in this embodiment, the obtained intrusion displacement amount of the bottom of the battery is compared with a preset intrusion threshold value, so as to determine whether the bottom of the battery is abnormal, and then a detection result of the bottom of the battery is output.
In the above embodiment, by disposing the pressure sensing unit at the bottom of the battery, the pressure information of the bottom of the battery is detected by the pressure sensing unit and converted into an electrical signal; the electric signal output by the pressure sensing unit is converted into the battery bottom intrusion displacement through the signal conversion unit, and the battery bottom detection result is output through the data analysis unit based on the battery bottom intrusion displacement, so that whether the battery bottom is abnormal or not is judged. The battery abnormality detection device can effectively monitor quantitative characterization of deformation of the bottom of the power battery, detect the accumulated hidden injury of the bottom of the power battery for a long time in real time, and can be practically applied to electric automobiles.
In some embodiments, since the pressure sensing unit 11 is mounted to the bottom of the battery, the pressure sensing unit 11 can sense pressure even when an abnormal condition such as a bulge does not occur at the bottom of the battery; when an abnormal condition such as a bulge occurs in the bottom of the battery, the pressure sensed by the pressure sensing unit 11 becomes large. Therefore, the pressure information may be the pressure collected by the pressure sensing unit 11 directly detecting the pressure of the bottom of the battery, or may be the difference between the pressure collected by the pressure sensor directly detecting the pressure of the bottom of the battery and the reference pressure when no abnormality, i.e. no bulge, occurs in the bottom of the battery.
When the pressure information is pressure information acquired by directly detecting the pressure of the bottom of the battery by the pressure sensing unit 11, the pressure sensing unit 11 generates an electric signal based on the pressure information, and the signal conversion unit 12 may acquire a pre-stored reference electric signal output by the pressure sensing unit 11 when no abnormality occurs in the bottom of the battery, so as to determine the intrusion displacement amount of the bottom of the battery based on the electric signal and a difference value of the reference electric signal when no abnormality occurs in the bottom of the battery.
When the pressure information is a difference between the pressure acquired by the pressure sensing unit 11 directly detecting the pressure of the bottom of the battery and the reference pressure when no abnormality occurs in the bottom of the battery, the signal conversion unit 12 may directly determine the intrusion displacement amount of the bottom of the battery based on the electric signal.
Alternatively, the electrical signal output by the signal conversion unit 12 may be a voltage signal, a current signal, a resistance signal, or the like, which is not limited in this embodiment. Taking the electrical signal as a voltage signal as an example, the signal conversion unit 12 may perform voltage-resistance-pressure-displacement conversion based on the voltage signal output from the pressure sensing unit 11, thereby obtaining the battery bottom intrusion displacement amount.
In some embodiments, the battery abnormality detection device further includes:
and the data storage unit is connected with the data analysis unit 13 and is used for collecting and storing various data generated in the battery abnormality detection device, including pressure information, electric signals, the invasion displacement of the bottom of the battery, the detection result of the bottom of the battery and the like. The data storage unit may include a data acquisition device for implementing the acquisition of the above data and a data storage device for implementing the storage of the above data.
And a power supply connected with the pressure sensing unit 11 and used for providing power supply voltage for structures such as the pressure sensing unit 11, the signal conversion unit 12, the data analysis unit 13, the data storage unit and the like. The power supply can be a low-voltage power supply, and the power supply range is 2V-12V.
In some embodiments, the pressure sensing unit 11 may be a thin film pressure sensing unit, as shown in fig. 2, including a thin film substrate 111, a plurality of thin film pressure sensors 112, and a protective layer 113.
Wherein the membrane substrate 111 is used to carry a membrane pressure sensor 112. The film substrate 111 may be a resin substrate, and the material of the film substrate 111 includes a resin material that can be sputter coated, which has advantages of good adhesion and good thermal conductivity, and has a certain fatigue durability.
As shown in fig. 3, a plurality of thin film pressure sensors 112 may be disposed on the thin film substrate 111 in an m×n matrix array. The thin film pressure sensor 112 includes an ink mixed with a carbon-based conductive material and a conductive silver paste-printed wiring, which may exhibit different voltage or resistance characteristics according to a change in pressure.
In some embodiments, at least two of the membrane pressure sensors 112 are arranged in series in the row direction and at least two of the membrane pressure sensors 112 are arranged in parallel in the column direction. For example, the membrane pressure sensors 112 located in the same row may be all connected in series, and then the membrane pressure sensors 112 in each row may be connected in parallel, which is not limited in this embodiment. In particular, the diaphragm pressure sensor 112 may be a miniature diaphragm pressure sensor.
In the present embodiment, the circuit structure of the thin film pressure sensor 112 is simplified by the serial arrangement of the thin film pressure sensor 112; by arranging the film pressure sensors 112 in parallel, when only a small amount of the film pressure sensors 112 are damaged, only a small part of the areas of the pressure sensing units 11 cannot work, the influence on the functions of the pressure sensing units 11 is small, and the maintenance times of the pressure sensing units 11 can be reduced; when the pressure sensing unit 11 needs to be maintained, the damaged film pressure sensor 112 can be quickly confirmed and only the corresponding film pressure sensor 112 can be replaced, so that the maintenance cost is reduced.
Alternatively, the membrane pressure sensors 112 may all be arranged in parallel, as in the example without limitation.
In this embodiment, by assembling the film pressure sensors 112 in different connection manners, pressure information of continuous points or surfaces within the coverage area of the film pressure sensors 112 is collected, and the finer the distribution grid formed by the film pressure sensor 112 array, the higher the area accuracy of the measurement area.
And the protective layer 113 is arranged on one side of the film pressure sensor 112 far away from the film substrate 111 and is used for protecting the film pressure sensor 112 and circuits thereof. The material of the protective layer 113 may be a material with good mechanical effect, high rebound resilience and good thermal conductivity, so that effective protection of structures such as the film pressure sensor 112, the sensor circuit, the low-voltage power supply circuit and the like can be realized.
In this embodiment, when the pressure sensing unit 11 is mounted on the bottom surface of the battery, the protective layer 113 may be disposed facing the bottom surface of the battery, so as to avoid the damage of the pressure sensing unit 11 caused by the extrusion of the battery to the pressure sensing unit 11.
Alternatively, the pressure sensing unit 11 may cover the bottom surface of the battery entirely, so that damage at any position of the bottom surface of the battery may be detected; alternatively, the pressure sensing unit 11 may partially cover the bottom surface of the battery, for example, the pressure sensing unit 11 covers only the position of the bottom surface of the battery where the bulge is more likely, which is not limited by the present embodiment.
Optionally, the thickness of the pressure sensing unit 11 is 1-2mm, the grid distribution of the array of the film pressure sensors 112 is greater than 100mm by 100mm, the pressure testing range is 0.1-10KN, the instantaneous working temperature range is-40-120 ℃, the common working temperature range is-20-60 ℃, the error is less than or equal to 3% of the measured value, and the temperature drift is less than or equal to 2%.
In some embodiments, the signal conversion unit 12 is further configured to: determining the intrusion displacement amount of the bottom of the battery based on the electric signal and the corresponding relation between the preset electric signal and displacement; the corresponding relation between the preset electric signal and the displacement is obtained based on the calibration result of the film pressure sensing unit.
In this embodiment, the wide-range tension-compression machine is used to calibrate the pressure sensing unit 11, so as to determine the correspondence between the electrical signal and the displacement. Specifically, calibration may be performed based on the sizes of different areas of the pressure sensing unit 11, respectively. In order to ensure the accuracy of test data and the timeliness of data transmission, the more the test points are, the more the calibrated data are. To avoid too large a measured range, in one embodiment, a data point calibration is chosen every 500N. After calibration is completed, the data obtained by testing are arranged into a form corresponding to voltage, resistance and pressure and displacement, so that the corresponding relation between the electric signal and the displacement is obtained.
Thus, after the signal conversion unit 12 obtains the electrical signal sent by the pressure sensing unit 11, it may determine the battery bottom intrusion displacement amount based on the electrical signal and the preset correspondence between the electrical signal and the displacement by using a difference method.
In this embodiment, by calibrating the pressure sensing unit 11, accurate conversion between the deformation of the bottom of the power battery and the pressure of the pressure sensing unit 11 is achieved, and the gap that early identification cannot be achieved due to bottom damage of the power battery at present is filled.
Alternatively, in the above embodiment, the signal conversion unit 12 may also randomly take a plurality of sets of values (such as voltage values) of the electrical signals, calculate corresponding pressure values and resistance values, test the voltage values and resistance values under the plurality of sets of pressure values by using a stretcher, calculate errors of the pressure sensor and the analysis program by comparing the random values with the test values, and consider the errors in practical use, thereby further improving the detection accuracy of the battery abnormality detection device.
In some embodiments, the signal conversion unit 12 is further configured to: determining a battery bottom anomaly location based on the electrical signal; the data analysis unit 13 is further configured to: and determining the battery bottom abnormal result based on the battery bottom abnormal position.
In the present embodiment, since the pressure sensing unit 11 includes the plurality of film pressure sensors 112 arranged in an array, the abnormal positions of the bottom of the battery corresponding to the pressure information detected by each film pressure sensor 112 can be obtained, so that the abnormal result of the bottom of the battery output by the data analysis unit 13 can include not only the abnormal condition of the bottom of the battery but also the abnormal position of the bottom of the battery, so that the subsequent inspector can perform quick inspection based on the abnormal position of the bottom of the battery.
In some embodiments, the data analysis unit 13 is further configured to: responding to the intrusion displacement amount of the bottom of the battery to be more than or equal to the intrusion threshold value, and judging whether the intrusion displacement amount of the bottom of the battery is caused by abnormal sensor signals; and outputting a battery bottom abnormal result in response to the battery bottom intrusion displacement amount not being caused by the sensor signal abnormality.
In this embodiment, the data analysis unit 13 compares the acquired intrusion displacement amount of the bottom of the battery with a preset intrusion threshold, and when the intrusion displacement amount of the bottom of the battery is greater than or equal to the intrusion threshold, that is, when the anomaly of the bottom of the battery is considered to affect the safety of the battery, it is further determined whether the intrusion displacement amount of the bottom of the battery is caused by the anomaly of the sensor signal, if yes, the pressure information of the bottom of the battery is collected again through the pressure sensing unit 11; and if the intrusion displacement amount of the bottom of the battery is not caused by abnormal sensor signals, outputting an abnormal result of the bottom of the battery.
In some embodiments, as shown in fig. 4, the battery abnormality detection apparatus further includes an early warning unit 14. The pre-warning unit 14 is configured to: and determining an early warning level based on the abnormal result of the bottom of the battery, and outputting an early warning signal according to the early warning level.
In this embodiment, a plurality of early warning levels may be set in advance, and different processing modes may be set according to different early warning levels. When the bottom of the battery is judged to be abnormal, the early warning level is determined according to the invasion displacement of the bottom of the battery, and different early warning signals are generated according to different early warning levels. For example, when the early warning level reaches the requirement of giving an early warning signal, giving the early warning signal, circularly collecting the pressure information at the bottom of the battery for multiple detection, and simultaneously giving a maintenance suggestion instruction; and if the early warning level reaches the emergency rescue requirement, giving an early warning signal and simultaneously starting an emergency rescue response command.
In this embodiment, the quantitative characterization of the deformation of the bottom of the power battery can be effectively monitored through the pressure sensing unit, real-time early warning is carried out on the long-term accumulated hidden injuries of the bottom of the power battery, and the method can be practically applied to electric vehicles, so that the spontaneous combustion accident rate of the electric vehicles caused by bottom protection failure is effectively reduced.
In this embodiment, the early warning signal may be displayed by a device such as an intelligent instrument installed on the vehicle, and the early warning signals of different levels may be different reminding modes, including text, voice, image display, etc.
Based on the same inventive concept, the present disclosure also provides a battery abnormality detection method corresponding to the apparatus of any embodiment, where the method is implemented based on the battery abnormality detection apparatus of any embodiment. As shown in fig. 5, the method includes:
step S101, obtaining pressure information of the bottom of the battery, and generating an electrical signal based on the pressure information.
In the present embodiment, by providing the pressure sensing unit 11 at the bottom of the battery and making the pressure sensing unit 11 at least partially cover the bottom surface of the battery, the pressure information of the bottom of the battery is collected by the pressure sensing unit 11 and an electric signal is generated based on the pressure information.
The electrical signal may be a voltage signal, a current signal, a resistance signal, or the like, which is not limited in this embodiment.
The pressure sensing unit 11 can completely cover the bottom surface of the battery, so that damage at any position of the bottom surface of the battery can be detected; alternatively, the pressure sensing unit 11 may partially cover the bottom surface of the battery, for example, the pressure sensing unit 11 covers only the position of the bottom surface of the battery where the bulge is more likely, which is not limited by the present embodiment.
Step S102, determining the battery bottom intrusion displacement based on the electric signal.
In this embodiment, the battery bottom intrusion displacement amount is the difference in height between the battery bottom bulge and the non-bulge. The signal conversion unit 12 may convert the electrical signal into a battery bottom intrusion displacement amount, that is, a height difference between a bulge portion of the battery bottom with respect to a non-bulge portion.
And step S103, determining a battery bottom abnormal result based on the battery bottom intrusion displacement and a preset intrusion threshold.
In this embodiment, when the bulge at the bottom of the battery is smaller, the safety of the power battery may not be affected, and only when the bulge at the bottom of the battery reaches a certain level, the safety of the power battery may be affected. Therefore, in this embodiment, the obtained intrusion displacement amount of the bottom of the battery is compared with a preset intrusion threshold value, so as to determine whether the bottom of the battery is abnormal, and then a detection result of the bottom of the battery is output.
In some embodiments, the determining the battery bottom intrusion displacement amount based on the electrical signal in step S102 includes: responding to the pressure information, which is obtained by directly detecting the pressure of the bottom of the battery, to obtain a reference electric signal when no abnormality occurs at the bottom of the battery, and determining the invasion displacement of the bottom of the battery based on the difference value of the electric signal and the reference electric signal; or, in response to the pressure information being a difference between the pressure obtained by directly detecting the pressure of the battery bottom and a reference pressure at which no abnormality occurs in the battery bottom, determining the battery bottom intrusion displacement amount based on the electric signal.
In some embodiments, the determining the battery bottom intrusion displacement amount based on the electrical signal in step S102 includes: determining the intrusion displacement amount of the bottom of the battery based on the electric signal and the corresponding relation between the preset electric signal and displacement; the corresponding relation between the preset electric signal and the displacement is obtained based on the calibration result of the film pressure sensing unit.
In this embodiment, the wide-range tension-compression machine is used to calibrate the pressure sensing unit 11, so as to determine the correspondence between the electrical signal and the displacement. Specifically, calibration may be performed based on the sizes of different areas of the pressure sensing unit 11, respectively. In order to ensure the accuracy of test data and the timeliness of data transmission, the more the test points are, the more the calibrated data are. To avoid too large a measured range, in one embodiment, a data point calibration is chosen every 500N. After calibration is completed, the data obtained by testing are arranged into a form corresponding to voltage, resistance and pressure and displacement, so that the corresponding relation between the electric signal and the displacement is obtained.
Thus, after the signal conversion unit 12 obtains the electrical signal sent by the pressure sensing unit 11, it may determine the battery bottom intrusion displacement amount based on the electrical signal and the preset correspondence between the electrical signal and the displacement by using a difference method.
In some embodiments, as shown in fig. 6, the method further comprises:
step S201, determining a battery bottom abnormal position based on the electric signal.
Step S202, determining the battery bottom abnormality result based on the battery bottom abnormality position.
In the present embodiment, since the pressure sensing unit 11 includes the plurality of film pressure sensors 112 arranged in an array, the abnormal positions of the bottom of the battery corresponding to the pressure information detected by each film pressure sensor 112 can be obtained, so that the abnormal result of the bottom of the battery output by the data analysis unit 13 can include not only the abnormal condition of the bottom of the battery but also the abnormal position of the bottom of the battery, so that the subsequent inspector can perform quick inspection based on the abnormal position of the bottom of the battery.
In some embodiments, as shown in fig. 7, determining the abnormal battery bottom result based on the battery bottom intrusion displacement and the preset intrusion threshold in step S103 includes:
step S301, in response to the battery bottom intrusion displacement amount being greater than or equal to the intrusion threshold, judging whether the battery bottom intrusion displacement amount is caused by sensor signal abnormality;
and step S302, outputting a battery bottom abnormal result in response to the battery bottom intrusion displacement amount not being caused by the sensor signal abnormality.
In this embodiment, the data analysis unit 13 compares the acquired intrusion displacement amount of the bottom of the battery with a preset intrusion threshold, and when the intrusion displacement amount of the bottom of the battery is greater than or equal to the intrusion threshold, that is, when the anomaly of the bottom of the battery is considered to affect the safety of the battery, it is further determined whether the intrusion displacement amount of the bottom of the battery is caused by the anomaly of the sensor signal, if yes, the pressure information of the bottom of the battery is collected again through the pressure sensing unit 11; and if the intrusion displacement amount of the bottom of the battery is not caused by abnormal sensor signals, outputting an abnormal result of the bottom of the battery.
In some embodiments, the method further comprises: and determining an early warning level based on the abnormal result of the bottom of the battery, and outputting an early warning signal according to the early warning level.
In this embodiment, a plurality of early warning levels may be set in advance, and different processing modes may be set according to different early warning levels. When the bottom of the battery is judged to be abnormal, the early warning level is determined according to the invasion displacement of the bottom of the battery, and the unused early warning signals are generated according to different early warning levels. For example, when the early warning level reaches the requirement of giving an early warning signal, giving the early warning signal, circularly collecting the pressure information at the bottom of the battery for multiple detection, and simultaneously giving a maintenance suggestion instruction; and if the early warning level reaches the emergency rescue requirement, giving an early warning signal and simultaneously starting an emergency rescue response command.
The method of the foregoing embodiments is implemented based on the corresponding apparatus in any of the foregoing embodiments, and has the beneficial effects of the corresponding apparatus embodiments, which are not described herein.
It should be noted that the method of the embodiments of the present disclosure may be performed by a single device, such as a computer or a server. The method of the embodiment can also be applied to a distributed scene, and is completed by mutually matching a plurality of devices. In the case of such a distributed scenario, one of the devices may perform only one or more steps of the methods of embodiments of the present disclosure, the devices interacting with each other to accomplish the methods.
It should be noted that the foregoing describes some embodiments of the present disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments described above and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.
Based on the same inventive concept, compared with the battery abnormality detection method of any of the above embodiments, the present disclosure further provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor implements the method of any of the above embodiments when executing the program.
Fig. 8 shows a more specific hardware architecture of an electronic device according to this embodiment, where the device may include: a processor 1010, a memory 1020, an input/output interface 1030, a communication interface 1040, and a bus 1050. Wherein processor 1010, memory 1020, input/output interface 1030, and communication interface 1040 implement communication connections therebetween within the device via a bus 1050.
The processor 1010 may be implemented by a general-purpose CPU (Central Processing Unit ), microprocessor, application specific integrated circuit (Application Specific Integrated Circuit, ASIC), or one or more integrated circuits, etc. for executing relevant programs to implement the technical solutions provided in the embodiments of the present disclosure.
The Memory 1020 may be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory ), static storage device, dynamic storage device, or the like. Memory 1020 may store an operating system and other application programs, and when the embodiments of the present specification are implemented in software or firmware, the associated program code is stored in memory 1020 and executed by processor 1010.
The input/output interface 1030 is used to connect with an input/output module for inputting and outputting information. The input/output module may be configured as a component in a device (not shown) or may be external to the device to provide corresponding functionality. Wherein the input devices may include a keyboard, mouse, touch screen, microphone, various types of sensors, etc., and the output devices may include a display, speaker, vibrator, indicator lights, etc.
Communication interface 1040 is used to connect communication modules (not shown) to enable communication interactions of the present device with other devices. The communication module may implement communication through a wired manner (such as USB, network cable, etc.), or may implement communication through a wireless manner (such as mobile network, WIFI, bluetooth, etc.).
Bus 1050 includes a path for transferring information between components of the device (e.g., processor 1010, memory 1020, input/output interface 1030, and communication interface 1040).
It should be noted that although the above-described device only shows processor 1010, memory 1020, input/output interface 1030, communication interface 1040, and bus 1050, in an implementation, the device may include other components necessary to achieve proper operation. Furthermore, it will be understood by those skilled in the art that the above-described apparatus may include only the components necessary to implement the embodiments of the present description, and not all the components shown in the drawings.
The electronic device of the foregoing embodiment is configured to implement the corresponding method in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiment, which is not described herein.
Based on the same inventive concept, corresponding to the battery abnormality detection device and the electronic device of any of the above embodiments, the present disclosure also provides a vehicle including the battery abnormality detection device and the electronic device of the above embodiments.
The vehicle of the above embodiment is implemented based on the corresponding battery abnormality detection device and the electronic device of the foregoing embodiment, and has the beneficial effects of the corresponding battery abnormality detection device and the electronic device embodiment, which are not described herein again.
Based on the same inventive concept, corresponding to any of the above-described embodiments of the method, the present disclosure also provides a non-transitory computer-readable storage medium storing computer instructions for causing the computer to perform the method as described in any of the above embodiments.
The computer readable media of the present embodiments, including both permanent and non-permanent, removable and non-removable media, may be used to implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device.
The storage medium of the foregoing embodiments stores computer instructions for causing the computer to perform the method of any of the foregoing embodiments, and has the advantages of the corresponding method embodiments, which are not described herein.
Those of ordinary skill in the art will appreciate that: the discussion of any of the embodiments above is merely exemplary and is not intended to suggest that the scope of the disclosure, including the claims, is limited to these examples; the technical features of the above embodiments or in the different embodiments may also be combined under the idea of the present disclosure, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present disclosure as described above, which are not provided in details for the sake of brevity.
Additionally, well-known power/ground connections to Integrated Circuit (IC) chips and other components may or may not be shown within the provided figures, in order to simplify the illustration and discussion, and so as not to obscure the embodiments of the present disclosure. Furthermore, the devices may be shown in block diagram form in order to avoid obscuring the embodiments of the present disclosure, and this also accounts for the fact that specifics with respect to implementation of such block diagram devices are highly dependent upon the platform on which the embodiments of the present disclosure are to be implemented (i.e., such specifics should be well within purview of one skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the disclosure, it should be apparent to one skilled in the art that embodiments of the disclosure can be practiced without, or with variation of, these specific details. Accordingly, the description is to be regarded as illustrative in nature and not as restrictive.
While the present disclosure has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of those embodiments will be apparent to those skilled in the art in light of the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the embodiments discussed.
The disclosed embodiments are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Accordingly, any omissions, modifications, equivalents, improvements, and the like, which are within the spirit and principles of the embodiments of the disclosure, are intended to be included within the scope of the disclosure.
Claims (12)
1. A battery abnormality detection device, characterized by comprising:
the pressure sensing unit is arranged at the bottom of the battery and at least partially covers the bottom surface of the battery and is configured to: acquiring pressure information of the bottom of the battery and generating an electric signal based on the pressure information;
a signal conversion unit configured to: determining a battery bottom intrusion displacement based on the electrical signal;
a data analysis unit configured to: and determining a battery bottom detection result based on the battery bottom intrusion displacement and a preset intrusion threshold.
2. The apparatus of claim 1, wherein the pressure sensing unit comprises:
a film substrate;
a plurality of membrane pressure sensors arranged in an array on the membrane substrate;
and the protective layer is arranged on one side of the film pressure sensor, which is far away from the film substrate.
3. The apparatus of claim 2, wherein the device comprises a plurality of sensors,
at least two film pressure sensors are arranged in series in the row direction;
at least two rows of the film pressure sensors are arranged in parallel in the column direction.
4. A battery abnormality detection method, characterized by comprising:
acquiring pressure information of the bottom of the battery, and generating an electric signal based on the pressure information;
determining a battery bottom intrusion displacement based on the electrical signal;
and determining a battery bottom abnormal result based on the battery bottom intrusion displacement and a preset intrusion threshold.
5. The method of claim 4, wherein determining the battery bottom intrusion displacement based on the electrical signal comprises:
responding to the pressure information, which is obtained by directly detecting the pressure of the bottom of the battery, to obtain a reference electric signal when no abnormality occurs at the bottom of the battery, and determining the invasion displacement of the bottom of the battery based on the difference value of the electric signal and the reference electric signal;
or,
and responding to the pressure information to be the difference value between the pressure obtained by directly detecting the pressure of the bottom of the battery and the reference pressure when no abnormality occurs at the bottom of the battery, and determining the invasion displacement amount of the bottom of the battery based on the electric signal.
6. The method of claim 4 or 5, wherein the determining the battery bottom intrusion displacement based on the electrical signal comprises:
determining the intrusion displacement amount of the bottom of the battery based on the electric signal and the corresponding relation between the preset electric signal and displacement;
the corresponding relation between the preset electric signal and the displacement is obtained based on the calibration result of the film pressure sensing unit.
7. The method as recited in claim 6, further comprising:
determining a battery bottom anomaly location based on the electrical signal;
and determining the battery bottom abnormal result based on the battery bottom abnormal position.
8. The method of claim 4, wherein the determining a battery bottom anomaly result based on the battery bottom intrusion displacement and a preset intrusion threshold comprises:
responding to the intrusion displacement amount of the bottom of the battery to be more than or equal to the intrusion threshold value, and judging whether the intrusion displacement amount of the bottom of the battery is caused by abnormal sensor signals;
and outputting a battery bottom abnormal result in response to the battery bottom intrusion displacement amount not being caused by the sensor signal abnormality.
9. The method as recited in claim 4, further comprising:
and determining an early warning level based on the abnormal result of the bottom of the battery, and outputting an early warning signal according to the early warning level.
10. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of any one of claims 4 to 9 when the program is executed by the processor.
11. A vehicle comprising the battery abnormality detection apparatus according to any one of claims 1 to 3 and the electronic device according to claim 10.
12. A non-transitory computer readable storage medium storing computer instructions for causing the computer to perform the method of any one of claims 4 to 9.
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| CN202210964867.3A CN117629465A (en) | 2022-08-11 | 2022-08-11 | Battery abnormality detection method, battery abnormality detection device, electronic device, vehicle, and storage medium |
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| CN202210964867.3A CN117629465A (en) | 2022-08-11 | 2022-08-11 | Battery abnormality detection method, battery abnormality detection device, electronic device, vehicle, and storage medium |
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