CN110579716B - Battery detection method and device - Google Patents
Battery detection method and device Download PDFInfo
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- CN110579716B CN110579716B CN201911007562.8A CN201911007562A CN110579716B CN 110579716 B CN110579716 B CN 110579716B CN 201911007562 A CN201911007562 A CN 201911007562A CN 110579716 B CN110579716 B CN 110579716B
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- 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]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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Abstract
The embodiment of the application discloses a battery detection method and device, which are used for obtaining detection data and standard data of a target battery, calculating to obtain current electrochemical data according to the detection data, wherein the current electrochemical data reflects the current electrochemical characteristics of the target battery, calculating to obtain standard electrochemical data according to the standard data, the standard electrochemical data reflects the standard electrochemical characteristics of the target battery, comparing the current electrochemical data with the standard electrochemical data to obtain a first comparison result, and determining the detection result of the target battery according to the first comparison result. The current electrochemical characteristics of the target battery can be reflected according to the detection data, so that whether the target battery is abnormal or not can be judged from an electrochemical layer.
Description
Technical Field
The invention relates to the technical field of battery detection, in particular to a battery detection method and device.
Background
With the rapid development of economy and the enhancement of environmental awareness of people, the utilization rate of new energy automobiles is higher and higher, and in order to ensure that the power battery of the new energy automobiles can provide and store energy in an optimal state, the state of the vehicle-mounted power battery needs to be effectively monitored so as to judge whether the power battery is abnormal or not.
However, most of the current abnormality detection methods for power batteries focus on quantitative rule analysis in a laboratory controlled environment, for example, the internal resistance value of a power battery can be obtained, and whether the internal resistance value is abnormal or not is judged to determine whether the power battery is abnormal or not. The detection mode is single, and comprehensive detection on the performance of the power battery cannot be met.
Disclosure of Invention
In order to solve the above technical problems, embodiments of the present application provide a method and an apparatus for battery detection, so as to improve accuracy and comprehensiveness of battery detection.
The embodiment of the application provides a battery detection method, which is characterized by comprising the following steps:
acquiring detection data and standard data of a target battery;
calculating to obtain current electrochemical data according to the detection data, and calculating to obtain standard electrochemical data according to the standard data; the current electrochemical data represents current electrochemical characteristics of the target cell, and the standard electrochemical data represents standard electrochemical characteristics of the target cell;
comparing the current electrochemical data with the standard electrochemical data to obtain a first comparison result;
and determining the detection result of the target battery according to the first comparison result.
Optionally, the standard data is at least one of the following data: the historical data of the target battery, the historical data of other batteries with the same type as the target battery and the real-time detection data of the other batteries.
Optionally, the current electrochemical data comprises at least one of: the current equivalent circuit ohmic internal resistance, the current equivalent circuit polarization internal resistance, the current capacity increment analysis ICA curve, the current differential voltage analysis DVA curve and the current open-circuit voltage OCV; the standard electrochemical data includes at least one of the following data corresponding to the current electrochemical data: standard equivalent circuit ohm internal resistance, standard equivalent circuit polarization internal resistance, standard ICA curve, standard DVA curve and standard OCV.
Optionally, the detecting data includes: the method comprises the steps that current charging data and/or current discharging data are/is obtained, the current charging data comprise current charging current and current charging voltage, and the current discharging data comprise current discharging current and current discharging voltage; the standard data includes: the standard charging data comprise standard charging current and standard charging voltage, and the standard discharging data comprise standard discharging current and standard discharging voltage.
Optionally, the detection data further includes a current rest voltage and/or a current rest current, and the standard data further includes a standard rest voltage and/or a standard rest current corresponding to the detection data.
Optionally, the current charging data further includes at least one of the following data: the current charging temperature, the current electric quantity and the current charging power, and the current discharging data further comprises at least one of the following data: current discharge temperature, current electric quantity, current discharge power, and ratio DOD of current discharge quantity to rated capacity; the standard charging data further includes at least one of the following data corresponding to the current charging data: the standard discharging data further comprises at least one of the following data corresponding to the current discharging data: standard discharge temperature, standard electric quantity, standard discharge power and standard DOD.
Optionally, the method further includes:
comparing the detection data with the standard data to obtain a second comparison result;
determining a detection result of the target battery according to the first comparison result, including:
and determining the detection result of the target battery according to the first comparison result and the second comparison result.
Optionally, the determining, according to the first comparison result, a detection result of the target battery includes:
and if the first comparison result meets a first preset condition, determining that the target battery works normally.
Optionally, the determining a detection result of the target battery according to the first comparison result and the second comparison result includes:
and if the first comparison result meets a first preset condition and the second comparison result meets a second preset condition, determining that the target battery works normally.
Optionally, the determining, according to the first comparison result, a detection result of the target battery includes:
determining that the target battery works normally according to the first comparison result;
or determining that the target battery is abnormal according to the first comparison result;
or predicting that the target battery is abnormal after the preset time according to the first comparison result.
The embodiment of the present application further provides a battery detection device, including:
the data acquisition unit is used for acquiring detection data and standard data of the target battery;
the calculating unit is used for calculating current electrochemical data according to the detection data and calculating standard electrochemical data according to the standard data; the current electrochemical data represents current electrochemical characteristics of the target cell, and the standard electrochemical data represents standard electrochemical characteristics of the target cell;
the first comparison unit is used for comparing the current electrochemical data with the standard electrochemical data to obtain a first comparison result;
and the result determining unit is used for determining the detection result of the target battery according to the first comparison result.
Optionally, the apparatus further comprises:
the second comparison unit is used for comparing the detection data with the standard data to obtain a second comparison result;
the result determining unit is specifically configured to:
and determining the detection result of the target battery according to the first comparison result and the second comparison result.
Optionally, the standard data is at least one of the following data: the historical data of the target battery, the historical data of other batteries with the same type as the target battery and the real-time detection data of the other batteries.
Optionally, the current electrochemical data comprises at least one of: the current equivalent circuit ohmic internal resistance, the current equivalent circuit polarization internal resistance, the current capacity increment analysis ICA curve, the current differential voltage analysis DVA curve and the current open-circuit voltage OCV; the standard electrochemical data includes at least one of the following data corresponding to the current electrochemical data: standard equivalent circuit ohm internal resistance, standard equivalent circuit polarization internal resistance, standard ICA curve, standard DVA curve and standard OCV.
Optionally, the detecting data includes: the method comprises the steps of obtaining current charging data and/or current discharging data, wherein the current charging data comprise current charging current and current charging voltage, and the current discharging data comprise current discharging current and current discharging voltage; the standard data includes: the standard charging data comprise standard charging current and standard charging voltage, and the standard discharging data comprise standard discharging current and standard discharging voltage.
Optionally, the detection data further includes a current rest voltage and/or a current rest current, and the standard data further includes a standard rest voltage and/or a standard rest current corresponding to the detection data.
Optionally, the current charging data further includes at least one of the following data: the current charging temperature, the current electric quantity and the current charging power, and the current discharging data further comprise at least one of the following data: current discharge temperature, current electric quantity, current discharge power, and ratio DOD of current discharge quantity to rated capacity; the standard charging data further includes at least one of the following data corresponding to the current charging data: the standard discharging data further comprises at least one of the following data corresponding to the current discharging data: standard discharge temperature, standard electric quantity, standard discharge power and standard DOD.
The embodiment of the present application further provides a battery detection device, including: a processor, a memory, a system bus;
the processor and the memory are connected through the system bus;
the memory is used for storing one or more programs, the one or more programs comprising instructions, which when executed by the processor, cause the processor to perform any one implementation of the battery detection method.
An embodiment of the present application further provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are run on a terminal device, the terminal device is enabled to execute any implementation manner of the battery detection method.
The embodiment of the application provides a battery detection method and device, which are used for obtaining detection data and standard data of a target battery, calculating to obtain current electrochemical data according to the detection data, wherein the current electrochemical data reflects the current electrochemical characteristics of the target battery, calculating to obtain standard electrochemical data according to the standard data, the standard electrochemical data reflects the standard electrochemical characteristics of the target battery, comparing the current electrochemical data with the standard electrochemical data to obtain a first comparison result, and determining the detection result of the target battery according to the first comparison result. In the embodiment of the application, the current electrochemical characteristics capable of reflecting the target battery can be obtained according to the detection data, so that whether the target battery is abnormal or not can be judged from the electrochemical level, and as the electrochemical characteristics are the basic characteristics of the battery and are the basic reasons of the external performance expression of the battery, the battery state determined according to the electrochemical characteristics is more accurate and has more foresight, so that the performance of the target battery is more comprehensively detected.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art according to the drawings.
Fig. 1 is a flowchart of a battery detection method according to an embodiment of the present disclosure;
fig. 2 is a block diagram of a battery detection apparatus according to an embodiment of the present disclosure.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
In order to ensure that a new energy automobile power battery can provide and store energy in an optimal state, the state of a vehicle-mounted power battery needs to be effectively monitored to judge whether the power battery is abnormal or not, quantitative rule analysis can be carried out on the power battery in a laboratory controllable environment at present, for example, the internal resistance value of the power battery can be obtained through detection, whether the internal resistance value is abnormal or not is judged to determine whether the power battery is abnormal or not, for example, the internal resistance value can be compared with the historical internal resistance value of the power battery for comparison, and if the difference value is large, the power battery is possibly abnormal. However, the detection method is single, and during the operation of the power battery, there may exist various abnormal expression forms, so the detection method cannot meet the requirement of overall detection of the performance of the power battery.
Based on this, the embodiment of the application provides a battery detection method and device, which obtains detection data and standard data of a target battery, and can calculate to obtain current electrochemical data according to the detection data, wherein the current electrochemical data reflects the current electrochemical characteristics of the target battery, and calculate to obtain standard electrochemical data according to the standard data, and the standard electrochemical data reflects the standard electrochemical characteristics of the target battery, and compares the current electrochemical data with the standard electrochemical data to obtain a first comparison result, and can determine the detection result of the target battery according to the first comparison result. In the embodiment of the application, the current electrochemical characteristic capable of reflecting the target battery can be obtained according to the detection data, so that whether the target battery is abnormal or not can be judged from the electrochemical level, and because the electrochemical characteristic is the fundamental characteristic of the battery and is the fundamental reason of the external performance expression of the battery, the battery state determined according to the electrochemical characteristic is more accurate and has more foresight, and the detection on the performance of the target battery is more comprehensive.
The following describes a specific implementation manner of the battery detection method and device provided by the embodiments of the present application in detail by using embodiments with reference to the accompanying drawings.
Referring to fig. 1, a flowchart of a battery detection method provided in an embodiment of the present application may include the following steps.
S101, acquiring detection data and standard data of the target battery.
In this application embodiment, the target battery may be a power battery in a new energy automobile, for example, may be a battery pack of the power battery, or may also be a module or a battery cell in the battery pack, or may also be a group of battery cells formed by a plurality of battery cells, and the group of battery cells may be detected by using the same temperature sensor. The detection data of the target battery may be obtained by testing the target battery before delivery, may be generated in the operation process of the target battery, and may also be generated when the target battery is standing, and the detection data may include voltage data, current data, temperature data, and electric quantity data of the target battery.
As a possible implementation manner, before the target battery leaves a factory, a charge and discharge test may be performed on the target battery, so as to obtain current charge data and/or current discharge data of the target battery, the current charge data and/or the current discharge data of the target battery may be used as detection data of the target battery, the current charge data may include a current charge voltage and a current charge current, and the current discharge data may include a current discharge voltage and a current discharge current. Of course, during the charging test, at least one of the following data may also be obtained: taking the current charging temperature, the current electric quantity and the current charging power of the target battery as the current charging data of the target battery; during the discharge test, at least one of the following data can also be obtained: the current discharging temperature, the current electric quantity, the current discharging power and the ratio (Depth of Discharge, DOD) of the current discharging quantity to the rated capacity are used as the current discharging data of the target battery.
As another possible implementation manner, in the actual operation process of the target battery, current charging data of the target battery in the charging process may be detected, and current discharging data of the target battery in the discharging process may also be detected, so as to obtain detection data of the target battery. Of course, the current charging temperature, the current discharging temperature, the current electric quantity, the current charging power, the current discharging power, the current DOD, and the like generated in the actual operation process of the target battery may also be used as the detection data of the target battery.
As still another possible implementation, when the target Battery is in the static state, current static data of the target Battery may also be detected by a Battery Management System (BMS) of the vehicle, and the current static data may include a current static current and a current static voltage, thereby being detected data of the target Battery.
The standard data of the target battery are data which are obtained in advance and represent the normal condition of the target battery, and correspond to the initial data of the target battery, so that the test data can be compared with the standard data. Since the test data of the target battery includes the current charging data and/or the current discharging data, the standard data of the corresponding target data may correspondingly include standard charging data and/or standard discharging data, wherein the standard charging data may include a standard charging current and a standard charging voltage and may further include a standard charging temperature, and the standard discharging data may include a standard discharging current and a standard discharging voltage and may further include: standard discharge temperature, standard discharge power, standard DOD, etc. If the test data of the target battery further includes the current standing data, the standard data of the target battery may also include standard standing data, and the standard standing data may include a standard standing current and a standard standing voltage.
Specifically, the standard data of the target data may be historical data of the target battery, such as historical charging current, historical charging voltage, historical charging temperature, historical discharging current, historical discharging voltage, historical discharging temperature, historical discharging power, historical DOD, and the like of the target battery; the standard data of the target battery can also be historical data of other batteries belonging to the same model as the target battery, such as historical charging current, historical charging voltage, historical charging temperature, historical discharging current, historical discharging voltage, historical discharging temperature, historical discharging power, historical DOD and the like of other batteries; the standard data of the target battery may also be real-time detection data of other batteries belonging to the same model as the target battery, for example, the batteries of the same model are simultaneously detected to obtain current detection data of the batteries, a reasonable data interval is determined according to the current detection data of a part of the batteries, and the standard data of the target battery is determined in the data interval.
If the target battery is an electric core, the other batteries of the same type as the target battery can be other electric cores in the same module as the target battery, can also be other electric cores in different modules in the same battery pack as the target battery, and can also be other electric cores in different battery packs as the target battery; if the target battery is a battery core group, namely corresponds to a group of battery cores of the same temperature sensor, other batteries of the same type with the target battery can be other telecommunication groups in the same module with the target battery, can also be other battery core groups in different modules in the same battery pack with the target battery, and can also be other battery core groups in different battery packs with the target battery; if the target battery is a module, other batteries with the same type as the target battery can be other modules in the same battery pack with the target battery or other modules in different battery packs with the target battery; and if the target battery is the battery pack, other batteries with the same type as the target battery are other battery packs. Generally, each vehicle is equipped with at least one battery pack, and other battery packs of the same type as the target battery may be battery packs of other vehicles.
And S102, calculating to obtain current electrochemical data according to the detection data, and calculating to obtain standard electrochemical data according to the standard data.
In the embodiment of the present application, the detected data is performance data of the performance of the target battery, for example, the current charging current and the current charging voltage may represent the charging performance of the target battery, the current discharging current and the current discharging voltage may represent the discharging performance of the target battery, and the standard data is data capable of representing the normal performance of the target battery, for example, data representing the charging performance in a normal state and data representing the discharging performance in a normal state.
In fact, the detected data of the target battery can also reflect the electrochemical characteristics inside the target battery to a certain extent, so that the detected data of the target battery can be processed to obtain the current electrochemical data, thereby reflecting the current electrochemical characteristics of the target battery. For example, by processing the detected current discharge current and current discharge Voltage of the target battery, data such as a current equivalent circuit ohmic internal resistance, a current equivalent circuit polarization internal resistance, a current Capacity Incremental Analysis (ICA) curve, a current Differential Voltage Analysis (DVA) curve, and a current Open Circuit Voltage (OCV) may be obtained, and the data may represent current electrochemical characteristics of the target battery, for example, the current ICA curve may represent a current loss (LLI) of active lithium in the target battery, a current structural degradation (LAM) of positive and negative active materials, and a current internal resistance change (ORI).
Accordingly, the standard data may be processed to obtain standard electrochemical data, so as to embody the standard electrochemical characteristics of the target battery, for example, by processing the historical discharge current and the historical discharge voltage of the target battery, the standard equivalent circuit ohmic internal resistance, the standard equivalent circuit polarization internal resistance, the standard ICA curve, the standard DVA curve, the standard OCV, and the like may be obtained, and the data may embody the standard electrochemical characteristics of the target battery, for example, the standard ICA curve may embody the standard LLI, the standard LAM, the standard ORI, and the like in the target battery.
S103, comparing the current electrochemical data with the standard electrochemical data to obtain a first comparison result.
The current electrochemical data is data capable of representing the current electrochemical characteristics of the target battery, the standard electrochemical data is data capable of representing the standard electrochemical characteristics of the target battery, if the current electrochemical characteristics of the target battery are close to the standard electrochemical characteristics, the electrochemical characteristics of the target battery are normal, the external performance of the target battery is normal, if the current electrochemical characteristics of the target battery are greatly different from the standard electrochemical characteristics, the electrochemical characteristics of the target battery are abnormal, even if the external performance of the target battery is normal, the performance of the target battery is unstable, and the target battery can be considered to be in abnormal operation.
It will be appreciated that the current electrochemical data corresponds to standard electrochemical data, for example there may be a standard ICA curve for the current ICA curve and a standard effective circuit ohmic internal resistance for the current equivalent circuit ohmic internal resistance. When comparing the current electrochemical data with the standard electrochemical data, the comparison is also performed correspondingly to obtain a first comparison result, for example, when comparing the current ICA curve with the standard ICA curve, the voltages corresponding to the peaks in the current ICA curve and the standard ICA curve, etc. may be compared to obtain the first comparison result. The first comparison result may be a ratio of values or a difference of values, and when the standard electrochemical data is a plurality of historical data, the first comparison result may also be whether the current electrochemical data is consistent with a change trend of the standard electrochemical data, or of course, the first comparison result may also be a comparison result in other forms capable of representing a difference between the current electrochemical data and the standard electrochemical data.
And S104, determining the detection result of the target battery according to the first comparison result.
The first comparison result is obtained by comparing the current electrochemical data with the standard electrochemical data, and can reflect the difference between the current electrochemical data and the standard electrochemical data, so that the difference between the performance of the target battery and the standard performance can be reflected on the electrochemical level, the detection result of the target battery can be determined according to the first comparison result, and the detection result can be the normal operation and the abnormal operation of the battery.
Specifically, if the first comparison result satisfies a first preset condition, the target battery is considered to be normally operated, and if the first comparison result does not satisfy the first preset condition, the target battery is considered to be abnormal.
For example, if the first comparison result is that the voltage difference corresponding to the peak values in the current ICA curve and the standard ICA curve is a, and the first preset condition is that the voltage difference corresponding to the peak values in the current ICA curve and the standard ICA curve is less than or equal to b, the target battery may be considered to be normally operated when a is less than or equal to b, and the target battery may be considered to be abnormal when a is greater than b.
For another example, the first comparison result is that the current ICA curve is shifted leftward with respect to a peak value in the standard ICA curve, and the first preset condition is that the current ICA curve is shifted rightward with respect to a peak value in the standard ICA curve, and thus it can be considered that the target battery is abnormal.
The abnormality determined according to the first comparison result is an abnormality of the electrochemical level, which may or may not have an external appearance on performance, but may not be highlighted in a future operation process of the target battery. That is, the operating state of the target battery in the future can be predicted from the first comparison result, for example, the target battery is abnormal after a preset time.
In the embodiment of the application, after the detection data and the standard data of the target battery are obtained, the detection data and the standard data can be compared to obtain a second comparison result, and the second comparison result can reflect the difference between the current performance of the target battery and the performance of the target battery in a normal state to a certain extent, that is, whether the performance of the target battery is abnormal or not can be reflected.
Therefore, in the embodiment of the present application, the detection result of the target battery may be determined by combining the first comparison result and the second comparison result. Specifically, if the first comparison result meets a first preset condition and the second comparison result meets a second preset condition, the target battery can be considered to be working normally; if the first comparison result does not satisfy the first preset condition or the second comparison result does not satisfy the second preset condition, it may be determined that the target battery is abnormal, and the abnormality may be an abnormality of the current operating state or an abnormality of the internal electrochemical reaction.
For example, if the second comparison result is that the difference between the current charging voltage and the historical charging voltage is c, and the second preset condition is that the difference between the current charging voltage and the historical charging voltage is less than or equal to d, the second comparison result may be considered to satisfy the second preset condition when c is less than or equal to d, at this time, the test result for the target battery may be determined as the first comparison result, and if c is greater than d, the second comparison result may be considered not to satisfy the second preset condition, at this time, it may be determined that the target battery is abnormal.
For another example, the first comparison result is that the present discharge current is increased with respect to the historical discharge current, and the first preset condition is that the present discharge current is decreased with respect to the historical discharge current, and thus it can be considered that the target battery is abnormal.
The embodiment of the application provides a battery detection method, which includes the steps of obtaining detection data and standard data of a target battery, obtaining current electrochemical data through calculation according to the detection data, enabling the current electrochemical data to represent current electrochemical characteristics of the target battery, obtaining standard electrochemical data through calculation according to the standard data, enabling the standard electrochemical data to represent standard electrochemical characteristics of the target battery, comparing the current electrochemical data with the standard electrochemical data to obtain a first comparison result, and determining the detection result of the target battery according to the first comparison result. In the embodiment of the application, the current electrochemical characteristics capable of reflecting the target battery can be obtained according to the detection data, so that whether the target battery is abnormal or not can be judged from the electrochemical level, and as the electrochemical characteristics are the basic characteristics of the battery and are the basic reasons of the external performance expression of the battery, the battery state determined according to the electrochemical characteristics is more accurate and has more foresight, so that the performance of the target battery is more comprehensively detected.
Based on the above battery detection method, an embodiment of the present application further provides a battery detection apparatus, which is shown in fig. 2 and is a structural block diagram of the battery detection apparatus provided in the embodiment of the present application, where the apparatus includes:
a data acquisition unit 110 for acquiring detection data and standard data of a target battery;
the calculating unit 120 is configured to calculate current electrochemical data according to the detection data, and calculate standard electrochemical data according to the standard data; the current electrochemical data represents current electrochemical characteristics of the target cell, and the standard electrochemical data represents standard electrochemical characteristics of the target cell;
a first comparing unit 130, configured to compare the current electrochemical data with the standard electrochemical data to obtain a first comparison result;
a result determining unit 140, configured to determine a detection result of the target battery according to the first comparison result.
Optionally, the apparatus further comprises:
the second comparison unit is used for comparing the detection data with the standard data to obtain a second comparison result;
the result determination unit is specifically configured to:
and determining the detection result of the target battery according to the first comparison result and the second comparison result.
Optionally, the standard data is at least one of the following data: the historical data of the target battery, the historical data of other batteries with the same type as the target battery and the real-time detection data of the other batteries.
Optionally, the current electrochemical data comprises at least one of: the current equivalent circuit ohmic internal resistance, the current equivalent circuit polarization internal resistance, the current capacity increment analysis ICA curve, the current differential voltage analysis DVA curve and the current open-circuit voltage OCV; the standard electrochemical data includes at least one of the following data corresponding to the current electrochemical data: standard equivalent circuit ohm internal resistance, standard equivalent circuit polarization internal resistance, standard ICA curve, standard DVA curve and standard OCV.
Optionally, the detecting data includes: the method comprises the steps that current charging data and/or current discharging data are/is obtained, the current charging data comprise current charging current and current charging voltage, and the current discharging data comprise current discharging current and current discharging voltage; the standard data includes: the standard charging data comprise standard charging current and standard charging voltage, and the standard discharging data comprise standard discharging current and standard discharging voltage.
Optionally, the detection data further includes a current rest voltage and/or a current rest current, and the standard data further includes a standard rest voltage and/or a standard rest current corresponding to the detection data.
Optionally, the current charging data further includes at least one of the following data: the current charging temperature, the current electric quantity and the current charging power, and the current discharging data further comprises at least one of the following data: current discharge temperature, current electric quantity, current discharge power, and ratio DOD of current discharge quantity to rated capacity; the standard charging data further includes at least one of the following data corresponding to the current charging data: the standard discharging data further comprises at least one of the following data corresponding to the current discharging data: standard discharge temperature, standard electric quantity, standard discharge power and standard DOD.
The embodiment of the application provides a battery detection device, which is used for obtaining detection data and standard data of a target battery, calculating to obtain current electrochemical data according to the detection data, wherein the current electrochemical data reflects the current electrochemical characteristics of the target battery, calculating to obtain standard electrochemical data according to the standard data, the standard electrochemical data reflects the standard electrochemical characteristics of the target battery, comparing the current electrochemical data with the standard electrochemical data to obtain a first comparison result, and determining the detection result of the target battery according to the first comparison result. In the embodiment of the application, the current electrochemical characteristics capable of reflecting the target battery can be obtained according to the detection data, so that whether the target battery is abnormal or not can be judged from the electrochemical level, and as the electrochemical characteristics are the basic characteristics of the battery and are the basic reasons of the external performance expression of the battery, the battery state determined according to the electrochemical characteristics is more accurate and has more foresight, so that the performance of the target battery is more comprehensively detected.
Further, the embodiment of the present application also provides a battery detection device, including: a processor, a memory, a system bus;
the processor and the memory are connected through the system bus;
the memory is configured to store one or more programs, the one or more programs including instructions, which when executed by the processor, cause the processor to perform any of the above-described battery detection methods.
Further, an embodiment of the present application further provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are run on a terminal device, the instructions cause the terminal device to execute any implementation method of the above battery detection method.
From the above description of the embodiments, it is clear to those skilled in the art that all or part of the steps in the method of the above embodiments may be implemented by software plus a necessary general hardware platform. Based on such understanding, the technical solution of the present application may be essentially or partially implemented in the form of a software product, which may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network communication device such as a media gateway, etc.) to execute the method according to the embodiments or some parts of the embodiments of the present application.
It should be noted that, in the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. The device disclosed in the embodiment corresponds to the method disclosed in the embodiment, so that the description is simple, and the relevant points can be referred to the description of the method part.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A battery testing method, comprising:
acquiring detection data and standard data of a target battery;
calculating to obtain current electrochemical data according to the detection data, and calculating to obtain standard electrochemical data according to the standard data; the current electrochemical data represents current electrochemical characteristics of the target cell, and the standard electrochemical data represents standard electrochemical characteristics of the target cell; wherein the current electrochemical data comprises the following data: the current equivalent circuit ohm internal resistance, the current equivalent circuit polarization internal resistance, the current capacity increment analysis ICA curve, the current differential voltage analysis DVA curve and the current open-circuit voltage OCV; the standard electrochemical data includes the following data corresponding to the current electrochemical data: standard equivalent circuit ohmic internal resistance, standard equivalent circuit polarization internal resistance, standard ICA curve, standard DVA curve and standard OCV;
comparing the current electrochemical data with the standard electrochemical data to obtain a first comparison result;
determining a detection result of the target battery according to the first comparison result, wherein the detection result is used for indicating whether the target battery works normally or the target battery works abnormally;
the method further comprises the following steps:
comparing the detection data with the standard data to obtain a second comparison result;
determining a detection result of the target battery according to the first comparison result, including:
determining a detection result of the target battery according to the first comparison result and the second comparison result;
if the first comparison result meets a first preset condition and the second comparison result meets a second preset condition, the target battery is considered to work normally;
and if the first comparison result does not meet the first preset condition or the second comparison result does not meet the second preset condition, determining that the target battery is abnormal.
2. The method of claim 1, wherein the standard data is at least one of: the historical data of the target battery, the historical data of other batteries with the same type as the target battery and the real-time detection data of the other batteries.
3. The method of claim 1, wherein detecting the data comprises: the method comprises the steps that current charging data and/or current discharging data are/is obtained, the current charging data comprise current charging current and current charging voltage, and the current discharging data comprise current discharging current and current discharging voltage; the standard data includes: the standard charging data comprise standard charging current and standard charging voltage, and the standard discharging data comprise standard discharging current and standard discharging voltage.
4. The method of claim 3, wherein the test data further comprises a present rest voltage and/or a present rest current, and the standard data further comprises a standard rest voltage and/or a standard rest current corresponding to the test data.
5. The method of claim 3 or 4, wherein the current charging data further comprises at least one of: the current charging temperature, the current electric quantity and the current charging power, and the current discharging data further comprise at least one of the following data: current discharge temperature, current electric quantity, current discharge power, and ratio DOD of current discharge quantity to rated capacity; the standard charging data further includes at least one of the following data corresponding to the current charging data: the standard discharging data further comprises at least one of the following data corresponding to the current discharging data: standard discharge temperature, standard electric quantity, standard discharge power and standard DOD.
6. A battery test apparatus, comprising:
the data acquisition unit is used for acquiring detection data and standard data of the target battery;
the calculating unit is used for calculating current electrochemical data according to the detection data and calculating standard electrochemical data according to the standard data; the current electrochemical data represents current electrochemical characteristics of the target cell, and the standard electrochemical data represents standard electrochemical characteristics of the target cell; wherein the current electrochemical data comprises the following data: the current equivalent circuit ohmic internal resistance, the current equivalent circuit polarization internal resistance, the current capacity increment analysis ICA curve, the current differential voltage analysis DVA curve and the current open-circuit voltage OCV; the standard electrochemical data includes the following data corresponding to the current electrochemical data: standard equivalent circuit ohmic internal resistance, standard equivalent circuit polarization internal resistance, standard ICA curve, standard DVA curve and standard OCV;
the first comparison unit is used for comparing the current electrochemical data with the standard electrochemical data to obtain a first comparison result;
a result determining unit, configured to determine a detection result of the target battery according to the first comparison result, where the detection result is used to indicate that the target battery is working normally or the target battery is working abnormally;
the second comparison unit is used for comparing the detection data with the standard data to obtain a second comparison result;
the result determination unit is specifically configured to:
determining a detection result of the target battery according to the first comparison result and the second comparison result;
if the first comparison result meets a first preset condition and the second comparison result meets a second preset condition, the target battery is considered to work normally;
and if the first comparison result does not meet the first preset condition or the second comparison result does not meet the second preset condition, determining that the target battery is abnormal.
7. A battery test apparatus, comprising: a processor, a memory, a system bus;
the processor and the memory are connected through the system bus;
the memory is to store one or more programs, the one or more programs comprising instructions, which when executed by the processor, cause the processor to perform the method of any of claims 1-5.
8. A computer-readable storage medium having stored therein instructions that, when executed on a terminal device, cause the terminal device to perform the method of any one of claims 1-5.
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| CN111693881B (en) * | 2020-05-28 | 2021-09-10 | 江苏大学 | Method for estimating state of health of battery on line under wide temperature range based on standardized temperature |
| CN112834935A (en) * | 2020-12-31 | 2021-05-25 | 东软睿驰汽车技术（沈阳）有限公司 | Method and device for obtaining battery cell open-circuit voltage |
| CN115308602A (en) * | 2021-05-08 | 2022-11-08 | 北京骑胜科技有限公司 | Battery detection method, device, server, storage medium and program product |
| CN113884891A (en) * | 2021-11-03 | 2022-01-04 | 广西电网有限责任公司北海供电局 | Storage battery fault control system |
| CN114137421B (en) * | 2021-11-30 | 2023-09-19 | 章鱼博士智能技术(上海)有限公司 | Battery abnormality detection method, device, equipment and storage medium |
| CN114636943B (en) * | 2022-05-12 | 2022-08-30 | 中创新航科技股份有限公司 | Battery device, detection method thereof, screening method and screening device of battery unit |
| CN115060320B (en) * | 2022-06-20 | 2023-09-29 | 武汉涛初科技有限公司 | Online monitoring and analyzing system for production quality of power lithium battery based on machine vision |
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| CN103616643B (en) * | 2013-11-15 | 2016-02-10 | 清华大学 | Analyze the data processing method of battery operation operating mode |
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