CN114859236A - Battery side voltage testing method and device, electronic equipment and storage medium - Google Patents

Battery side voltage testing method and device, electronic equipment and storage medium Download PDF

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Publication number
CN114859236A
CN114859236A CN202210807422.4A CN202210807422A CN114859236A CN 114859236 A CN114859236 A CN 114859236A CN 202210807422 A CN202210807422 A CN 202210807422A CN 114859236 A CN114859236 A CN 114859236A
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side voltage
tested
batteries
scatter diagram
positive
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CN114859236B (en
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车晓锋
杨庆亨
厉强
陈中忠
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Zhongxing Pylon Battery Co Ltd
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Zhongxing Pylon Battery Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/385—Arrangements for measuring battery or accumulator variables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • General Physics & Mathematics (AREA)
  • Secondary Cells (AREA)
  • Tests Of Electric Status Of Batteries (AREA)

Abstract

The application provides a battery side voltage testing method, a device, electronic equipment and a storage medium, wherein the method comprises the following steps: the method comprises the steps of firstly obtaining positive side voltage and negative side voltage of a plurality of batteries to be tested, calculating positive side voltage slope and negative side voltage slope, secondly determining a first scatter diagram according to the positive side voltage slope and the positive side voltage, determining a second scatter diagram according to the negative side voltage slope and the negative side voltage, and finally determining a target battery of which corresponding side voltage information meets testing conditions from the plurality of batteries to be tested based on respective non-discrete points in the first scatter diagram and the second scatter diagram. The method and the device can quickly and efficiently detect the side voltage of the battery to be tested, and determine qualified and unqualified batteries in the battery to be tested based on the detection result.

Description

Battery side voltage testing method and device, electronic equipment and storage medium
Technical Field
The present disclosure relates to the field of testing technologies, and in particular, to a method and an apparatus for testing a battery side voltage, an electronic device, and a storage medium.
Background
At present the laminate polymer battery trade mainly adopts the plastic-aluminum membrane to carry out the heat-seal encapsulation, but the seal can appear among the plastic-aluminum membrane heat-seal process and mix with the damaged battery damage weeping that leads to on metallic impurity/inside PP layer, can cause the influence to electronic equipment at the in-process that is suitable for, the battery condition of starting a fire appears even.
Therefore, it is necessary to detect the voltage across the battery to screen the qualified battery. The scheme for efficiently detecting the edge voltage of the soft package battery is lacked in the related technology.
Disclosure of Invention
In view of this, embodiments of the present application provide a method and an apparatus for testing a battery side voltage, an electronic device, and a storage medium, which can quickly and efficiently detect a side voltage of a battery to be tested, and determine batteries with qualified and unqualified side voltage information in the battery to be tested based on a detection result.
The technical scheme of the embodiment of the application is realized as follows:
in a first aspect, an embodiment of the present application provides a method for testing a battery edge voltage, including the following steps:
acquiring positive electrode side voltage and negative electrode side voltage of a plurality of batteries to be tested at different moments;
calculating the slope of the positive side voltage of the batteries to be tested according to the positive side voltage at different moments; calculating the negative side voltage slopes of the batteries to be tested according to the negative side voltages at different moments;
determining a first scatter diagram according to the positive electrode side voltage slopes and the positive electrode side voltages of the plurality of batteries to be tested; determining a second scatter diagram according to the negative side voltage slopes and the negative side voltages of the plurality of batteries to be tested; each point in the first scatter diagram corresponds to positive side voltage information of a battery to be tested, and each point in the second scatter diagram corresponds to negative side voltage information of the battery to be tested;
and determining a target battery of which the corresponding side voltage information meets the test condition from the plurality of batteries to be tested based on the non-discrete points in the first scatter diagram and the second scatter diagram.
In one possible embodiment, the method further comprises: acquiring respective discrete points in the first scatter diagram and the second scatter diagram;
for each discrete point in the first scatter diagram and the second scatter diagram, if the discrete point is discrete along the direction of increasing the absolute value of the slope of the edge voltage in the corresponding scatter diagram, determining the discrete point as a first abnormal state; if the discrete point is discrete along the direction of increasing the edge voltage in the corresponding discrete point diagram, determining the discrete point as a second abnormal state, wherein the first abnormal state represents an abnormal state caused by the abnormality of the test equipment, and the second abnormal state represents an abnormal state caused by the abnormality of the test equipment but the edge voltage information; the side voltage slope comprises a positive side voltage slope and a negative side voltage slope, and the side voltage comprises a positive side voltage and a negative side voltage.
In a possible embodiment, the calculating the slope of the positive side voltage of the plurality of batteries to be tested according to the positive side voltages at different times and the slope of the negative side voltage of the plurality of batteries to be tested according to the negative side voltages at different times includes:
calculating a first difference value of a first positive side voltage and a second positive side voltage of a plurality of batteries to be tested at different moments, and determining the first difference value as a positive side voltage slope corresponding to the plurality of batteries to be tested;
and calculating a second difference value of the first negative side voltage and the second negative side voltage of the plurality of batteries to be tested at different moments, and determining the second difference value as the negative side voltage slope corresponding to the plurality of batteries to be tested.
In a possible embodiment, the calculating a first difference between a first positive side voltage and a second positive side voltage of the plurality of batteries to be tested at different times, and determining the first difference as a positive side voltage slope corresponding to the plurality of batteries to be tested includes:
calculating a first difference value of a first positive electrode side voltage and a second positive electrode side voltage of a plurality of batteries to be tested at different times;
calculating a first average value of a plurality of first difference values according to the group number at different moments; taking the first average value as a positive electrode side voltage slope corresponding to the plurality of batteries to be tested;
the calculating a second difference value between a first negative side voltage and a second negative side voltage of the plurality of batteries to be tested at different times, and determining the second difference value as a negative side voltage slope corresponding to the plurality of batteries to be tested, includes:
calculating a second difference value of the first negative side voltage and the second negative side voltage of the plurality of batteries to be tested at different times;
calculating a second average value of a plurality of second difference values according to the group number at different moments; and taking the second average value as the negative side voltage slope corresponding to the plurality of batteries to be tested.
In a possible embodiment, the determining a first scatter diagram according to the positive side voltage slope and the positive side voltage of the plurality of batteries to be tested; and determining a second scatter diagram according to the negative side voltage slopes and the negative side voltages of the plurality of batteries to be tested, wherein the second scatter diagram comprises:
establishing a first scatter diagram template and a second scatter diagram template; the horizontal axis of the first scatter diagram template represents positive side voltage, the vertical axis of the first scatter diagram template represents positive side voltage slope, the horizontal axis of the second scatter diagram template represents negative side voltage, and the vertical axis of the second scatter diagram template represents negative side voltage slope;
determining first position information of the plurality of batteries to be tested in the first scattergram template according to the positive side voltage slopes and the positive side voltages of the plurality of batteries to be tested, wherein the first position information comprises an abscissa value and an ordinate value in the first scattergram;
generating a first scatter diagram according to the first position information of the plurality of batteries to be tested;
determining second position information of the plurality of batteries to be tested in the second scattergram template according to the negative side voltage slope and the negative side voltage of the plurality of batteries to be tested, wherein the second position information comprises an abscissa value and an ordinate value in the second scattergram;
and generating a second scatter diagram according to the second position information of the plurality of batteries to be tested.
In one possible embodiment, the determining, from the plurality of batteries to be tested, a target battery whose corresponding side voltage information satisfies a test condition based on the non-discrete point in each of the first scatter diagram and the second scatter diagram includes:
determining a first non-discrete region in the first scatter diagram and a second non-discrete region in the second scatter diagram according to the respective non-discrete points in the first scatter diagram and the second scatter diagram;
determining a first target point from points in the first non-discrete area and a second target point from points in the second non-discrete area, wherein the side voltage information corresponding to the first target point and the second target point belongs to the same battery to be tested;
and determining a target battery according to the first target point and the second target point.
In one possible embodiment, the method further comprises:
counting each target discrete point belonging to a first abnormal state in the first scatter diagram and the second scatter diagram, and determining an abnormal battery to be detected corresponding to the target discrete point according to the target discrete point;
and after the number of the abnormal batteries to be detected reaches a set value, re-executing the side voltage testing method on the abnormal batteries to be detected based on the testing equipment, or when the number of the abnormal batteries to be detected is a first number, adding a second number of the batteries to be tested, and re-executing the side voltage testing method on the first number of the abnormal batteries to be detected and the second number of the batteries to be tested based on the testing equipment together with the first number of the abnormal batteries to be detected and the second number of the batteries to be tested based on the testing equipment, wherein the first number is less than or equal to the set value, and the sum of the first number and the second number is equal to the set value.
In a second aspect, an embodiment of the present application further provides a device for testing a voltage across a battery, where the device includes:
the acquisition module is used for acquiring the positive electrode side voltage and the negative electrode side voltage of a plurality of batteries to be tested at different moments;
the calculation module is used for calculating the slope of the positive side voltage of the batteries to be tested according to the positive side voltage at different moments; calculating the negative side voltage slopes of the batteries to be tested according to the negative side voltages at different moments;
the first determination module is used for determining a first scatter diagram according to the positive electrode side voltage slopes and the positive electrode side voltages of the batteries to be tested; determining a second scatter diagram according to the negative side voltage slopes and the negative side voltages of the plurality of batteries to be tested; each point in the first scatter diagram corresponds to positive side voltage information of a battery to be tested, and each point in the second scatter diagram corresponds to negative side voltage information of the battery to be tested;
and the second determining module is used for determining a target battery of which the corresponding side voltage information meets the test condition from the plurality of batteries to be tested based on the non-discrete points in the first scatter diagram and the second scatter diagram. In a third aspect, an embodiment of the present application further provides an electronic device, including: the battery side voltage testing method comprises a processor, a storage medium and a bus, wherein the storage medium stores machine-readable instructions executable by the processor, when an electronic device runs, the processor and the storage medium communicate through the bus, and the processor executes the machine-readable instructions to execute the steps of the battery side voltage testing method according to any one of the first aspect.
In a fourth aspect, this application further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to execute the steps of the battery side voltage testing method according to any one of the first aspect.
The embodiment of the application has the following beneficial effects:
the side voltage slope of the corresponding pole is obtained through obtaining the side voltage of the positive pole and the negative pole of the battery to be tested at different moments, so that a scatter diagram of the relation between the side voltage slope and the side voltage is constructed, in the scatter diagram, the point with abnormal side voltage information can be in a discrete state, therefore, a non-discrete area with normal side voltage information can be rapidly and visually determined through the scatter diagram, and the target battery with normal side voltage information can be rapidly and efficiently determined through the non-discrete area.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a schematic flow chart diagram of steps S101-S104 provided in an embodiment of the present application;
FIG. 2 is a schematic flow chart of steps S201-S202 provided in the embodiments of the present application;
FIG. 3 is a schematic flowchart of steps S301-S302 according to an embodiment of the present application;
FIG. 4 is a flowchart illustrating steps S401-S405 provided in an embodiment of the present application;
FIG. 5 is a schematic flowchart of steps S501-S503 provided in an embodiment of the present application;
FIG. 6 is a schematic flowchart of steps S601-S602 provided in an embodiment of the present application;
FIG. 7 is a first scatter plot provided by an embodiment of the present application;
FIG. 8 is a block diagram of a device for testing a battery edge voltage according to an embodiment of the present disclosure;
fig. 9 is a schematic diagram of a component module of an electronic device according to an embodiment of the present application.
Detailed Description
In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, 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 should be understood that the drawings in the present application are for illustrative and descriptive purposes only and are not used to limit the scope of protection of the present application. Additionally, it should be understood that the schematic drawings are not necessarily drawn to scale. The flowcharts used in this application illustrate operations implemented according to some embodiments of the present application. It should be understood that the operations of the flow diagrams may be performed out of order, and steps without logical context may be performed in reverse order or simultaneously. One skilled in the art, under the guidance of this application, may add one or more other operations to, or remove one or more operations from, the flowchart.
In the following description, reference is made to "some embodiments" which describe a subset of all possible embodiments, but it is understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict.
In addition, the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
In the following description, references to the terms "first \ second \ third" are only to distinguish similar objects and do not denote a particular order, but rather the terms "first \ second \ third" are used to interchange specific orders or sequences, where appropriate, so as to enable the embodiments of the application described herein to be practiced in other than the order shown or described herein.
It should be noted that in the embodiments of the present application, the term "comprising" is used to indicate the presence of the features stated hereinafter, but does not exclude the addition of further features.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of the application and is not intended to be limiting of the application.
Referring to fig. 1, fig. 1 is a schematic flowchart of steps S101 to S104 provided in an embodiment of the present application, and will be described with reference to steps S101 to S104 shown in fig. 1.
S101, acquiring positive electrode side voltage and negative electrode side voltage of a plurality of batteries to be tested at different moments;
step S102, calculating the slope of the positive side voltage of the batteries to be tested according to the positive side voltage at different moments; calculating the negative side voltage slopes of the batteries to be tested according to the negative side voltages at different moments;
step S103, determining a first scatter diagram according to the positive electrode side voltage slopes and the positive electrode side voltages of the plurality of batteries to be tested; determining a second scatter diagram according to the negative side voltage slopes and the negative side voltages of the plurality of batteries to be tested; each point in the first scatter diagram corresponds to positive side voltage information of a battery to be tested, and each point in the second scatter diagram corresponds to negative side voltage information of the battery to be tested;
and step S104, determining a target battery with corresponding side voltage information meeting the test conditions from the plurality of batteries to be tested based on the non-discrete points in the first scatter diagram and the second scatter diagram.
According to the battery side voltage testing method, the side voltage slopes of the corresponding poles are calculated by obtaining the positive and negative side voltages of the battery to be tested at different moments, so that a scatter diagram of the relation between the side voltage slopes and the side voltages is constructed, points with abnormal side voltage information are in a discrete state in the scatter diagram, therefore, through the scatter diagram, non-discrete areas with normal side voltage information can be rapidly and visually determined, and through the non-discrete areas, the target battery with normal side voltage information can be rapidly and efficiently determined.
The above exemplary steps of the embodiments of the present application will be described below.
In step S101, positive side voltages and negative side voltages of a plurality of batteries to be tested at different times are obtained.
In some embodiments, the side voltage of the battery to be tested includes a positive side voltage and a negative side voltage, and for the positive side voltage, the positive side voltage at different times needs to be obtained for calculating a slope of the positive side voltage, and similarly for the negative side voltage, the negative side voltage at different times needs to be obtained for calculating a slope of the negative side voltage.
In some embodiments, the testing equipment comprises a probe and a multimeter, and when the positive-electrode side voltage is measured, the probe is placed in contact with the positive electrode and the aluminum layer between the positive electrode and the aluminum plastic film to obtain the voltage value of the multimeter, so that the positive-electrode side voltage is obtained; similarly, for the voltage at the negative electrode side, the voltage value of the multimeter is obtained by contacting the probe with the negative electrode and the aluminum layer between the negative electrode and the aluminum plastic film, so that the voltage at the negative electrode side is obtained.
As an example, the testing equipment firstly obtains the positive side voltage V positive 1 of the battery to be tested, and after the time t, obtains the positive side voltage V positive 2 of the battery to be tested again; and then acquiring the negative side voltage Vminus 1 of the battery to be tested, and acquiring the positive side voltage Vminus 2 of the battery to be tested after a time t, wherein the time t can be any numerical value, and in general, the time t is 0.5 second.
By the method, the side voltage of the battery to be tested at different times is obtained, and data support is provided for calculating the side voltage slope.
In step S102, calculating the slope of the positive side voltage of the plurality of batteries to be tested according to the positive side voltages at different times; and calculating the negative side voltage slopes of the batteries to be tested according to the negative side voltages at different moments.
In some embodiments, after the positive side voltage and the negative side voltage of the battery to be tested are obtained, the positive side voltage slope and the negative side voltage slope need to be calculated respectively.
As an example, the slope of the side voltage of the battery to be tested includes a slope of the positive side voltage and a slope of the negative side voltage, the slope of the positive side voltage of the battery to be tested is a quotient of a difference between V positive 1 and V positive 2 and time t, i.e., K positive = (V positive 1-V positive 2)/t, and the slope of the negative side voltage of the battery to be tested is a quotient of a difference between V negative 1 and V negative 2 and time t, i.e., K negative = (V negative 1-V negative 2)/t.
In the mode, the side voltage slope of the battery to be tested is obtained through calculation, and a basis is provided for constructing a scatter diagram of the side voltage slope and the side voltage of the battery to be tested.
In step S103, determining a first scatter diagram according to the positive electrode side voltage slopes and the positive electrode side voltages of the plurality of batteries to be tested; determining a second scatter diagram according to the negative side voltage slopes and the negative side voltages of the plurality of batteries to be tested; each point in the first scatter diagram corresponds to positive side voltage information of a battery to be tested, and each point in the second scatter diagram corresponds to negative side voltage information of the battery to be tested.
In some embodiments, after obtaining the side voltage slope and the side voltage of the battery to be tested, a scatter diagram is required to be constructed according to the side voltage slope and the side voltage, in order to distinguish the positive electrode and the negative electrode of the battery to be tested, a first scatter diagram is constructed for the positive electrode side voltage slope and the positive electrode side voltage, and a second scatter diagram is constructed for the negative electrode side voltage slope and the negative electrode side voltage; each point in the first scatter diagram represents positive side voltage information, the positive side voltage information comprises a positive side voltage slope and positive side voltage, each point in the second scatter diagram represents negative side voltage information, and the negative side voltage information comprises a negative side voltage slope and negative side voltage; the positive side voltage information and the negative side voltage information respectively represent positive test information and negative test information of the battery to be tested.
As an example, in constructing the first scattergram, the positive side voltage slope and the second measured positive side voltage V positive 2 are selected to construct the first scattergram, and in constructing the second scattergram, the negative side voltage slope and the second measured negative side voltage V negative 2 are selected to construct the second scattergram, which is because: when the side voltage of a certain pole of the battery to be tested is measured in a short time, the measured value in the later time is more stable.
In the mode, the first scatter diagram and the second scatter diagram are respectively constructed based on the positive side voltage information and the negative side voltage information of the battery to be tested, and visual reference basis is provided for obtaining the target battery.
In step S104, a target battery whose corresponding side voltage information satisfies a test condition is determined from the plurality of batteries to be tested based on the respective non-discrete points in the first scatter diagram and the second scatter diagram.
In some embodiments, each point in the first scatter diagram represents positive side voltage information of the battery to be tested, so when the sample size of the battery to be tested is large enough, points with abnormal positive side voltage information in the battery to be tested tend to be discrete, similarly, because each point in the second scatter diagram represents negative side voltage information of the battery to be tested, when the sample size of the battery to be tested is large enough, points with abnormal negative side voltage information in the battery to be tested also tend to be discrete, accordingly, for non-discrete points in the first scatter diagram and the second scatter diagram, it can be determined that the non-discrete points are normal positive side voltage information or negative side voltage information in the battery to be tested, and when the positive side voltage information and the negative side voltage information belong to the same battery to be tested, it can be determined that the battery to be tested is the target battery.
In the above manner, according to the position information of the point in the constructed scatter diagram, the side voltage information of which the non-discrete point is normal is determined, and the battery to be tested of which the positive side voltage information and the negative side voltage information are both normal is determined as the target battery.
In some embodiments, referring to fig. 2, fig. 2 is a schematic flowchart of steps S201 to S202 provided in the embodiments of the present application, and will be described with reference to the steps.
In step S201, discrete points in the first scattergram and the second scattergram are acquired.
In some embodiments, for the discrete points in the first scatter diagram and the second scatter diagram, we consider that the discrete points represent the side voltage information of the battery to be tested as abnormal information. However, the abnormal information may be the side voltage information abnormality caused by the abnormality of the battery itself, or may be caused by the abnormality of the test equipment during the test, and therefore, the discrete points in the scattergram need to be analyzed again, and therefore, the respective discrete points in the first scattergram and the second scattergram are acquired.
In the mode, the discrete points in the scatter diagram are obtained, and an analysis basis is provided for the reason analysis of the subsequent abnormal edge voltage information.
In step S202, for each discrete point in the first scattergram and the second scattergram, if the discrete point is scattered along a direction in which an absolute value of an edge voltage slope in the corresponding scattergram increases, the discrete point is determined as a first abnormal state; if the discrete point is discrete along the direction of increasing the edge voltage in the corresponding discrete point diagram, determining the discrete point as a second abnormal state, wherein the first abnormal state represents an abnormal state caused by the abnormality of the test equipment, and the second abnormal state represents an abnormal state caused by the abnormality of the test equipment but the edge voltage information; the side voltage slope comprises a positive side voltage slope and a negative side voltage slope, and the side voltage comprises a positive side voltage and a negative side voltage.
In some embodiments, if the discrete point is discrete along a direction in which an absolute value of the side voltage slope in the corresponding scattergram increases, it indicates that the side voltage slope is maximum, and the side voltage is minimum, in this case, when a probe of the test device measures the side voltage of the positive electrode or the negative electrode at different times, the probe does not contact the aluminum layer of the aluminum-plastic film once and is conducted with the corresponding electrode, so that the measured side voltage value is maximum, or when a multimeter of the test device measures the side voltage at a certain time, a short-circuit fault occurs, so that the measured side voltage value is maximum, the abnormal state is an abnormal state caused by the abnormality of the test device, and therefore, the discrete point is determined as a first abnormal state; if the discrete point is discrete along the direction of increasing the side voltage in the corresponding discrete point diagram, the slope of the side voltage is very small, and the side voltage is very large, in this case, the side voltage values measured twice are both very large, the test equipment is normal, but the abnormal state is caused by the abnormal side voltage information, and therefore, the discrete point is determined as the second abnormal state.
As an example, referring to fig. 7, fig. 7 is a first scattergram provided in the embodiment of the present application. The first point 701 and the second point 702 are discrete points, wherein the slope of the positive voltage of the first point 701 is larger, but the positive voltage is smaller, and when the positive voltage is measured for the first time, because of the abnormal condition of the multimeter, the positive voltage V1 is measured to be 2.3V, when the multimeter is normal for the second time, the positive voltage V2 is measured to be 0.4V, so the absolute value of the slope of the positive voltage is 1.9V, and the positive voltage V2 is 0.4V, which is displayed as the first point 701 in the first scatter diagram, and at this time, we consider that the test equipment is abnormal.
With continued reference to fig. 7, the slope of the positive side voltage at the second point 702 in fig. 7 is smaller, but the positive side voltage is larger, which indicates that the positive side voltages measured twice are both large, and therefore, we consider that the side voltage information corresponding to the second point 702 is abnormal.
In the above manner, for different discrete directions of the discrete points in the scatter diagram, whether the abnormal state of the discrete points is an abnormal state caused by the abnormality of the test equipment or an abnormal state caused by the abnormality of the test equipment but the side voltage information is abnormal is respectively determined, so that the misjudgment caused by the abnormality of the test equipment is prevented.
In some embodiments, referring to fig. 3, fig. 3 is a schematic flowchart of steps S301 to S302 provided in this embodiment, where the calculating of the slope of the positive side voltage of the multiple batteries to be tested according to the positive side voltage at different times and the calculating of the slope of the negative side voltage of the multiple batteries to be tested according to the negative side voltage at different times can be implemented by steps S301 to S302, and the steps will be described in a set.
In step S301, a first difference between a first positive side voltage and a second positive side voltage of the multiple batteries to be tested at different times is calculated, and the first difference is determined as a positive side voltage slope corresponding to the multiple batteries to be tested.
In some embodiments, the positive-side voltage slopes of a plurality of batteries to be tested need to be calculated, and the method for calculating the positive-side voltage slopes generally includes: the quotient of the difference between V positive 1 and V positive 2 and the time t, i.e., K positive = (V positive 1-V positive 2)/t, but in order to simplify the calculation process, the difference between V positive 1 and V positive 2 is directly used as the positive side voltage slope, i.e., K positive = V positive 1-V positive 2, and since the position distribution of the points in the first scatter diagram is finally required, the division by the time t is not required.
In the mode, the positive side voltage slope of the battery to be tested is obtained by calculating the positive side voltage, the calculation process is simplified, and a foundation is provided for the construction of the first scatter diagram.
In step S302, a second difference between the first negative side voltage and the second negative side voltage of the multiple batteries to be tested at different times is calculated, and the second difference is determined as a negative side voltage slope corresponding to the multiple batteries to be tested.
In some embodiments, it is further required to calculate the negative side voltage slopes of the batteries to be tested, and in general, the negative side voltage slope is calculated by: the quotient of the difference between V minus 1 and V minus 2 and the time t, i.e., K minus = (V minus 1-V minus 2)/t, but in order to simplify the calculation process, the difference between V minus 1 and V minus 2 is directly used as the slope of the negative side voltage, i.e., K minus = V minus 1-V minus 2, and since the position distribution of the points in the second scatter diagram is finally required, the division by the time t is not required.
In the mode, the negative side voltage slope of the battery to be tested is obtained by calculating the negative side voltage, the calculation process is simplified, and a foundation is provided for the construction of the second scatter diagram.
In some embodiments, the calculating a first difference between a first positive side voltage and a second positive side voltage of the plurality of batteries to be tested at different times, and determining the first difference as a positive side voltage slope corresponding to the plurality of batteries to be tested may be implemented by the following steps.
Calculating a first difference value of a first positive electrode side voltage and a second positive electrode side voltage of a plurality of batteries to be tested at different times;
calculating a first average value of a plurality of first difference values according to the group number at different moments; and taking the first average value as the positive electrode side voltage slope corresponding to the plurality of batteries to be tested.
As an example, to improve the accuracy of the calculated positive slope, a plurality of sets of first difference values of the first positive side voltage and the second positive side voltage at different times may be measured, and a first average value may be obtained for the plurality of sets of results to obtain a more accurate result.
In some embodiments, the calculating a second difference between the first negative side voltage and the second negative side voltage of the plurality of batteries to be tested at different times, and determining the second difference as the negative side voltage slope corresponding to the plurality of batteries to be tested may be implemented by the following steps.
Calculating a second difference value of the first negative side voltage and the second negative side voltage of the plurality of batteries to be tested at different times;
calculating a second average value of a plurality of second difference values according to the group number at different moments; and taking the second average value as the negative side voltage slope corresponding to the plurality of batteries to be tested.
As an example, to improve the accuracy of the calculated negative slope, a plurality of sets of second differences between the first negative side voltage and the second negative side voltage at different times may be measured, and a second average may be obtained for the plurality of sets of results to obtain a more accurate result.
In the above manner, a more accurate side voltage slope is obtained by averaging a plurality of sets of data when calculating the side voltage slope.
In some embodiments, referring to fig. 4, fig. 4 is a schematic flowchart of steps S401-S405 provided in an embodiment of the present application, where a first scatter plot is determined according to the positive side voltage slopes and the positive side voltages of the plurality of batteries to be tested; and determining a second scatter diagram according to the negative side voltage slopes and the negative side voltages of the plurality of batteries to be tested can be realized through steps S401 to S405, and the steps will be described in a set.
In step S401, a first scatter diagram template and a second scatter diagram template are established; the horizontal axis of the first scatter diagram template represents a positive side voltage, the vertical axis of the first scatter diagram template represents a positive side voltage slope, the horizontal axis of the second scatter diagram template represents a negative side voltage, and the vertical axis of the second scatter diagram template represents a negative side voltage slope.
In some embodiments, a first scattergram template in which the positive side voltage is taken as the horizontal axis (X axis) and the positive side voltage slope is taken as the vertical axis (Y axis) and a second scattergram template in which the negative side voltage is taken as the horizontal axis (X axis) and the negative side voltage slope is taken as the vertical axis (Y axis) are first created, and the units of the horizontal axis and the vertical axis may be set to be negative in the second scattergram template so that the dots in the second scattergram template are all located in the first quadrant for easy observation.
In step S402, determining first position information of the plurality of batteries to be tested in the first scattergram template according to the positive side voltage slopes and the positive side voltages of the plurality of batteries to be tested, wherein the first position information includes abscissa and ordinate values in the first scattergram.
In some embodiments, since the horizontal axis and the vertical axis of the first scattergram template correspond to the positive side voltage and the positive side voltage slope obtained in the above embodiments, respectively, positive side voltage information (positive side voltage and positive side voltage slope) of a plurality of batteries to be tested can be plotted on the first scattergram template, and the first position information (coordinate value) of each point in the first scattergram template is the positive side voltage information of the corresponding battery to be tested.
In step S403, a first scatter diagram is generated according to the first position information of the plurality of batteries to be tested.
In some embodiments, after the first position information of the plurality of batteries to be tested is determined, points corresponding to the first position information of the plurality of batteries to be tested are drawn on the first scatter diagram template, and a first scatter diagram is generated.
In step S404, second position information of the plurality of batteries to be tested in the second scattergram template is determined according to the negative side voltage slope and the negative side voltage of the plurality of batteries to be tested, wherein the second position information includes an abscissa value and an ordinate value in the second scattergram.
In some embodiments, since the horizontal axis and the vertical axis of the second scattergram template respectively correspond to the negative side voltage and the negative side voltage slope obtained in the above embodiments, negative side voltage information (negative side voltage and negative side voltage slope) of a plurality of batteries to be tested can be plotted on the second scattergram template, and the second position information (coordinate value) of each point in the second scattergram template is the negative side voltage information of the corresponding battery to be tested.
In step S405, a second scattergram is generated according to the second position information of the plurality of batteries to be tested.
In some embodiments, after the second position information of the plurality of batteries to be tested is determined, points corresponding to the second position information of the plurality of batteries to be tested are drawn on the second scattergram template, and a second scattergram is generated.
In the mode, the scatter diagram template with the side voltage as the horizontal axis and the side voltage slope as the vertical axis is created, and the corresponding scatter diagram is determined based on the position information on the scatter diagram template determined by the side voltage information of the plurality of batteries to be tested, so that visual map image basis is provided for determining the target battery.
In some embodiments, referring to fig. 5, fig. 5 is a schematic flowchart of steps S501 to S503 provided in an embodiment of the present application, and the determining, based on the non-discrete points in the first scatter diagram and the second scatter diagram, a target battery from the plurality of batteries to be tested whose corresponding side voltage information satisfies the test condition may be implemented through steps S501 to S503, and the steps will be described in a set.
In step S501, a first non-discrete region in the first scattergram and a second non-discrete region in the second scattergram are determined according to respective non-discrete points in the first scattergram and the second scattergram.
In some embodiments, a first non-discrete region in the first scatter diagram and a second non-discrete region in the second scatter diagram may be determined from the drawn first scatter diagram and second scatter diagram, where the first non-discrete region and the second non-discrete region represent regions where the side voltage information is normal, that is, the side voltage information of any point in the first non-discrete region and the second non-discrete region is normal.
As an example, referring to fig. 7, taking the first scatter diagram as an example, first, the first non-discrete area is determined from the first scatter diagram, and the side voltage information of any point in the first non-discrete area is normal.
In step S502, a first target point is determined from the points in the first non-discrete area, and a second target point is determined from the points in the second non-discrete area, where the side voltage information corresponding to the first target point and the second target point belong to the same battery to be tested.
In some embodiments, since the first non-discrete region has positive side voltage information of a plurality of batteries to be tested, and the second non-discrete region has negative side voltage information of a plurality of batteries to be tested, if it is determined that the side voltage information of one battery to be tested is normal, it is necessary to simultaneously satisfy that the positive side voltage information and the negative side voltage information of the battery to be tested are both normal, it is necessary to determine the first target point from points in the first non-discrete region, and to determine the second target point from points in the second non-discrete region, so as to ensure that the side voltage information of the positive electrode and the negative electrode of the battery to be tested is both normal.
In step S503, a target cell is determined according to the first target point and the second target point.
After the first target point and the second target point are obtained, it can be determined that the side voltage information of the anode and the cathode of the battery to be tested is normal, and the battery to be tested is the target battery.
In the above manner, the first non-discrete region is determined from the first scatter diagram, the second non-discrete region is determined from the second scatter diagram, and the positive side voltage information and the negative side voltage information of the same battery to be tested are determined from the first non-discrete region and the second non-discrete region, so that the target battery is intuitively and efficiently determined from the scatter diagram.
In some embodiments, referring to fig. 6, fig. 6 is a schematic flowchart of steps S601 to S602 provided in the embodiments of the present application, and the steps will be collected for description.
In step S601, each target discrete point belonging to a first abnormal state in the first scatter diagram and the second scatter diagram is counted, and an abnormal battery to be detected corresponding to the target discrete point is determined according to the target discrete point.
In some embodiments, since each target discrete point belonging to the first abnormal state in the first scatter diagram and the second scatter diagram is possibly caused by a fault of the testing equipment, and the side voltage information of the battery to be tested does not necessarily satisfy the testing condition, the battery to be tested needs to be tested again.
In step S602, after the number of the abnormal batteries to be detected reaches a set value, the method for testing the edge voltage is executed again on the abnormal batteries to be detected based on the test equipment, or when the number of the abnormal batteries to be detected is a first number, a second number of batteries to be tested is added, the first number of the abnormal batteries to be detected and the second number of the batteries to be tested are executed again on the first number of the abnormal batteries to be detected and the second number of the batteries to be tested based on the test equipment together, where the first number is less than or equal to the set value, and a sum of the first number and the second number is equal to the set value.
In some embodiments, after a batch of batteries to be tested are tested, it is determined that the number of the batteries to be tested corresponding to the target discrete point may be smaller than the number of the batteries in the test of the batch of batteries to be tested according to the target discrete point, so that the batteries to be tested can be accumulated, and after the number of the batteries to be tested reaches, all the batteries to be tested in the batch are uniformly tested, or the batteries to be tested detected in this time are mixed with the batteries to be tested in the next batch, and the batteries to be tested are tested together with the batteries to be tested in the next batch.
In summary, the embodiments of the present application have the following beneficial effects:
the side voltage slope of the corresponding pole is obtained through obtaining the side voltage of the positive pole and the negative pole of the battery to be tested at different moments, so that a scatter diagram of the relation between the side voltage slope and the side voltage is constructed, in the scatter diagram, the point with abnormal side voltage information can be in a discrete state, therefore, a non-discrete area with normal side voltage information can be rapidly and visually determined through the scatter diagram, and the target battery with normal side voltage information can be rapidly and efficiently determined through the non-discrete area.
Based on the same inventive concept, the embodiment of the present application further provides a device for testing voltage at the battery edge corresponding to the method for testing voltage at the battery edge in the first embodiment, and since the principle of solving the problem of the device in the embodiment of the present application is similar to that of the method for testing voltage at the battery edge, the implementation of the device can refer to the implementation of the method, and the repeated parts are not described again.
As shown in fig. 8, fig. 8 is a block diagram of a device 800 for testing a voltage of a battery edge according to an embodiment of the present disclosure. The battery side voltage test apparatus 800 includes:
an obtaining module 801, configured to obtain positive-side voltages and negative-side voltages of multiple batteries to be tested at different times;
a calculating module 802, configured to calculate a slope of the positive side voltages of the multiple batteries to be tested according to the positive side voltages at different times; calculating the negative side voltage slopes of the batteries to be tested according to the negative side voltages at different moments;
a first determining module 803, configured to determine a first scatter diagram according to the positive edge voltage slopes and the positive edge voltages of the multiple batteries to be tested; determining a second scatter diagram according to the negative side voltage slopes and the negative side voltages of the plurality of batteries to be tested; each point in the first scatter diagram corresponds to positive side voltage information of a battery to be tested, and each point in the second scatter diagram corresponds to negative side voltage information of the battery to be tested;
a second determining module 804, configured to determine, based on the non-discrete points in the first scatter diagram and the second scatter diagram, a target battery whose corresponding side voltage information satisfies a test condition from the multiple batteries to be tested.
It will be understood by those skilled in the art that the implementation functions of each unit in the battery side voltage testing apparatus 800 shown in fig. 8 can be understood by referring to the related description of the battery side voltage testing method. The functions of the units in the battery side voltage testing apparatus 800 shown in fig. 8 may be implemented by a program running on a processor, or may be implemented by specific logic circuits.
In a possible implementation, the second determining module 804 further includes: acquiring respective discrete points in the first scatter diagram and the second scatter diagram;
for each discrete point in the first scatter diagram and the second scatter diagram, if the discrete point is discrete along the direction of increasing the absolute value of the slope of the edge voltage in the corresponding scatter diagram, determining the discrete point as a first abnormal state; if the discrete point is discrete along the direction of increasing the edge voltage in the corresponding discrete point diagram, determining the discrete point as a second abnormal state, wherein the first abnormal state represents an abnormal state caused by the abnormality of the test equipment, and the second abnormal state represents an abnormal state caused by the abnormality of the test equipment but the edge voltage information; the side voltage slope comprises a positive side voltage slope and a negative side voltage slope, and the side voltage comprises a positive side voltage and a negative side voltage.
In one possible implementation, the calculation module 802 further includes: calculating the slope of the voltage of the positive electrode sides of the plurality of batteries to be tested according to the voltage of the positive electrode sides at different moments, and calculating the slope of the voltage of the negative electrode sides of the plurality of batteries to be tested according to the voltage of the negative electrode sides at different moments, wherein the method comprises the following steps:
calculating a first difference value of a first positive side voltage and a second positive side voltage of a plurality of batteries to be tested at different moments, and determining the first difference value as a positive side voltage slope corresponding to the plurality of batteries to be tested;
and calculating a second difference value of the first negative side voltage and the second negative side voltage of the plurality of batteries to be tested at different moments, and determining the second difference value as the negative side voltage slope corresponding to the plurality of batteries to be tested.
In a possible implementation, the calculating module 802 calculates a first difference between a first positive side voltage and a second positive side voltage of the plurality of batteries to be tested at different times, and determines the first difference as a positive side voltage slope corresponding to the plurality of batteries to be tested, including:
calculating a first difference value of a first positive electrode side voltage and a second positive electrode side voltage of a plurality of batteries to be tested at different times;
calculating a first average value of a plurality of first difference values according to the group number at different moments; and taking the first average value as the positive electrode side voltage slope corresponding to the plurality of batteries to be tested.
In a possible implementation manner, the calculating module 802 calculates a second difference between the first negative side voltage and the second negative side voltage of the multiple batteries to be tested at different times, and determines the second difference as a negative side voltage slope corresponding to the multiple batteries to be tested, including:
calculating a second difference value of the first negative side voltage and the second negative side voltage of the plurality of batteries to be tested at different times;
calculating a second average value of a plurality of second difference values according to the group number at different moments; and taking the second average value as the negative side voltage slope corresponding to the plurality of batteries to be tested.
In a possible implementation, the first determining module 803 determines a first scatter diagram according to the positive side voltage slope and the positive side voltage of the plurality of batteries to be tested; and determining a second scatter diagram according to the negative side voltage slopes and the negative side voltages of the plurality of batteries to be tested, wherein the second scatter diagram comprises:
establishing a first scatter diagram template and a second scatter diagram template; the horizontal axis of the first scatter diagram template represents positive side voltage, the vertical axis of the first scatter diagram template represents positive side voltage slope, the horizontal axis of the second scatter diagram template represents negative side voltage, and the vertical axis of the second scatter diagram template represents negative side voltage slope;
determining first position information of the plurality of batteries to be tested in the first scattergram template according to the positive side voltage slopes and the positive side voltages of the plurality of batteries to be tested, wherein the first position information comprises an abscissa value and an ordinate value in the first scattergram;
generating a first scatter diagram according to the first position information of the plurality of batteries to be tested;
determining second position information of the plurality of batteries to be tested in the second scattergram template according to the negative side voltage slope and the negative side voltage of the plurality of batteries to be tested, wherein the second position information comprises an abscissa value and an ordinate value in the second scattergram;
and generating a second scatter diagram according to the second position information of the plurality of batteries to be tested.
In one possible implementation, the determining module 804 determines, from the multiple batteries to be tested, a target battery whose corresponding side voltage information satisfies the test condition based on the non-discrete point in each of the first scatter diagram and the second scatter diagram, and includes:
determining a first non-discrete region in the first scatter diagram and a second non-discrete region in the second scatter diagram according to the respective non-discrete points in the first scatter diagram and the second scatter diagram;
determining a first target point from points in the first non-discrete area and a second target point from points in the second non-discrete area, wherein the side voltage information corresponding to the first target point and the second target point belongs to the same battery to be tested;
and determining a target battery according to the first target point and the second target point.
In a possible implementation, the second determining module 804 further includes:
counting each target discrete point belonging to a first abnormal state in the first scatter diagram and the second scatter diagram, and determining an abnormal battery to be detected corresponding to the target discrete point according to the target discrete point;
and after the number of the abnormal batteries to be detected reaches a set value, re-executing the side voltage testing method on the abnormal batteries to be detected based on the testing equipment, or when the number of the abnormal batteries to be detected is a first number, adding a second number of the batteries to be tested, and re-executing the side voltage testing method on the first number of the abnormal batteries to be detected and the second number of the batteries to be tested based on the testing equipment together with the first number of the abnormal batteries to be detected and the second number of the batteries to be tested based on the testing equipment, wherein the first number is less than or equal to the set value, and the sum of the first number and the second number is equal to the set value.
According to the battery side voltage testing device, the side voltage slopes of the corresponding poles are calculated by obtaining the positive and negative side voltages of the battery to be tested at different moments, so that a scatter diagram of the relation between the side voltage slopes and the side voltages is constructed, the non-discrete area with normal side voltage information can be rapidly and visually determined through the scatter diagram, and the target battery with normal side voltage information can be rapidly and efficiently determined.
As shown in fig. 9, fig. 9 is a schematic diagram of constituent modules of an electronic device 900 according to an embodiment of the present application, where the electronic device 900 includes:
a processor 901, a storage medium 902 and a bus 903, where the storage medium 902 stores machine-readable instructions executable by the processor 901, when the electronic device 900 runs, the processor 901 and the storage medium 902 communicate with each other through the bus 903, and the processor 901 executes the machine-readable instructions to perform the steps of the battery side voltage testing method according to the embodiment of the present application.
In practice, the various components of the electronic device 900 are coupled together by a bus 903. It is understood that the bus 903 is used to enable communications among the components. The bus 903 includes a power bus, a control bus, and a status signal bus, in addition to a data bus. But for clarity of illustration the various busses are labeled as bus 903 in figure 9.
The electronic equipment obtains the positive and negative side voltages of the battery to be tested at different moments and calculates to obtain the side voltage slope of the corresponding pole, so that a scatter diagram of the relation between the side voltage slope and the side voltage is constructed, the non-discrete area with normal side voltage information can be rapidly and visually determined through the scatter diagram, and the target battery with normal side voltage information can be rapidly and efficiently determined.
The embodiment of the present application further provides a computer-readable storage medium, where the storage medium stores executable instructions, and when the executable instructions are executed by at least one processor 901, the method for testing the battery edge voltage according to the embodiment of the present application is implemented.
In some embodiments, the storage medium may be a Memory such as a magnetic random Access Memory (FRAM), a Read Only Memory (ROM), a Programmable Read Only Memory (PROM), an Erasable Programmable Read Only Memory (EPROM), an Electrically Erasable Programmable Read Only Memory (EEPROM), a Flash Memory (Flash Memory), a magnetic surface Memory, an optical Disc, or a Compact Disc Read Only Memory (CD-ROM); or may be various devices including one or any combination of the above memories.
In some embodiments, executable instructions may be written in any form of programming language (including compiled or interpreted languages), in the form of programs, software modules, scripts or code, and may be deployed in any form, including as a stand-alone program or as a module, component, subroutine, or other unit suitable for use in a computing environment.
By way of example, executable instructions may correspond, but do not necessarily have to correspond, to files in a file system, and may be stored in a portion of a file that holds other programs or data, such as in one or more scripts stored in a hypertext markup Language (HTML) document, in a single file dedicated to the program in question, or in multiple coordinated files (e.g., files that store one or more modules, sub-programs, or portions of code).
As an example, executable instructions may be deployed to be executed on one computing device or on multiple computing devices located at one site or distributed across multiple sites and interconnected by a communication network.
The computer readable storage medium described above.
In the several embodiments provided in the present application, it should be understood that the disclosed method and electronic device may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a platform server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A battery side voltage testing method is characterized in that testing equipment is applied to test a soft package battery, and the method comprises the following steps:
acquiring positive electrode side voltage and negative electrode side voltage of a plurality of batteries to be tested at different moments;
calculating the slope of the positive side voltage of the batteries to be tested according to the positive side voltage at different moments; calculating the negative side voltage slopes of the batteries to be tested according to the negative side voltages at different moments;
determining a first scatter diagram according to the positive electrode side voltage slopes and the positive electrode side voltages of the plurality of batteries to be tested; determining a second scatter diagram according to the negative side voltage slopes and the negative side voltages of the plurality of batteries to be tested; each point in the first scatter diagram corresponds to positive side voltage information of a battery to be tested, and each point in the second scatter diagram corresponds to negative side voltage information of the battery to be tested;
and determining a target battery of which the corresponding side voltage information meets the test condition from the plurality of batteries to be tested based on the non-discrete points in the first scatter diagram and the second scatter diagram.
2. The method of claim 1, further comprising:
acquiring respective discrete points in the first scatter diagram and the second scatter diagram;
for each discrete point in the first scatter diagram and the second scatter diagram, if the discrete point is discrete along the direction of increasing the absolute value of the slope of the edge voltage in the corresponding scatter diagram, determining the discrete point as a first abnormal state; if the discrete point is discrete along the direction of increasing the edge voltage in the corresponding discrete point diagram, determining the discrete point as a second abnormal state, wherein the first abnormal state represents an abnormal state caused by the abnormality of the test equipment, and the second abnormal state represents an abnormal state caused by the abnormality of the test equipment but the edge voltage information; the side voltage slope comprises a positive side voltage slope and a negative side voltage slope, and the side voltage comprises a positive side voltage and a negative side voltage.
3. The method of claim 1, wherein calculating positive side voltage slopes of the plurality of batteries to be tested according to the positive side voltages at different times and calculating negative side voltage slopes of the plurality of batteries to be tested according to the negative side voltages at different times comprises:
calculating a first difference value of a first positive side voltage and a second positive side voltage of a plurality of batteries to be tested at different moments, and determining the first difference value as a positive side voltage slope corresponding to the plurality of batteries to be tested;
and calculating a second difference value of the first negative side voltage and the second negative side voltage of the plurality of batteries to be tested at different moments, and determining the second difference value as the negative side voltage slope corresponding to the plurality of batteries to be tested.
4. The method of claim 3, wherein calculating a first difference between a first positive side voltage and a second positive side voltage of the plurality of batteries to be tested at different times, and determining the first difference as a positive side voltage slope corresponding to the plurality of batteries to be tested comprises:
calculating a first difference value of a first positive electrode side voltage and a second positive electrode side voltage of a plurality of batteries to be tested at different times;
calculating a first average value of a plurality of first difference values according to the group number at different moments; taking the first average value as a positive electrode side voltage slope corresponding to the plurality of batteries to be tested;
the calculating a second difference value between a first negative side voltage and a second negative side voltage of the plurality of batteries to be tested at different times, and determining the second difference value as a negative side voltage slope corresponding to the plurality of batteries to be tested, includes:
calculating a second difference value of the first negative side voltage and the second negative side voltage of the plurality of batteries to be tested at different times;
calculating a second average value of a plurality of second difference values according to the group number at different moments; and taking the second average value as the negative side voltage slope corresponding to the plurality of batteries to be tested.
5. The method of claim 1, wherein said determining a first scatter plot is based on said positive side voltage slope and said positive side voltage of said plurality of batteries under test; and determining a second scatter diagram according to the negative side voltage slopes and the negative side voltages of the plurality of batteries to be tested, wherein the second scatter diagram comprises:
establishing a first scatter diagram template and a second scatter diagram template; the horizontal axis of the first scatter diagram template represents positive side voltage, the vertical axis of the first scatter diagram template represents positive side voltage slope, the horizontal axis of the second scatter diagram template represents negative side voltage, and the vertical axis of the second scatter diagram template represents negative side voltage slope;
determining first position information of the plurality of batteries to be tested in the first scattergram template according to the positive side voltage slopes and the positive side voltages of the plurality of batteries to be tested, wherein the first position information comprises an abscissa value and an ordinate value in the first scattergram;
generating a first scatter diagram according to the first position information of the plurality of batteries to be tested;
determining second position information of the plurality of batteries to be tested in the second scattergram template according to the negative side voltage slope and the negative side voltage of the plurality of batteries to be tested, wherein the second position information comprises an abscissa value and an ordinate value in the second scattergram;
and generating a second scatter diagram according to the second position information of the plurality of batteries to be tested.
6. The method of claim 1, wherein the determining, from the plurality of batteries under test, a target battery for which corresponding side voltage information satisfies a test condition based on the respective non-discrete points in the first and second scatter plots comprises:
determining a first non-discrete region in the first scatter diagram and a second non-discrete region in the second scatter diagram according to the respective non-discrete points in the first scatter diagram and the second scatter diagram;
determining a first target point from points in the first non-discrete area and a second target point from points in the second non-discrete area, wherein the side voltage information corresponding to the first target point and the second target point belongs to the same battery to be tested;
and determining a target battery according to the first target point and the second target point.
7. The method of claim 2, further comprising:
counting each target discrete point belonging to a first abnormal state in the first scatter diagram and the second scatter diagram, and determining an abnormal battery to be detected corresponding to the target discrete point according to the target discrete point;
and after the number of the abnormal batteries to be detected reaches a set value, re-executing the side voltage testing method on the abnormal batteries to be detected based on the testing equipment, or when the number of the abnormal batteries to be detected is a first number, adding a second number of the batteries to be tested, and re-executing the side voltage testing method on the first number of the abnormal batteries to be detected and the second number of the batteries to be tested based on the testing equipment together with the first number of the abnormal batteries to be detected and the second number of the batteries to be tested based on the testing equipment, wherein the first number is less than or equal to the set value, and the sum of the first number and the second number is equal to the set value.
8. A battery side voltage testing apparatus, the apparatus comprising:
the acquisition module is used for acquiring the positive electrode side voltage and the negative electrode side voltage of a plurality of batteries to be tested at different moments;
the calculation module is used for calculating the slope of the positive side voltage of the batteries to be tested according to the positive side voltage at different moments; calculating the slope of the negative side voltage of the batteries to be tested according to the negative side voltage at different moments;
the first determination module is used for determining a first scatter diagram according to the positive electrode side voltage slopes and the positive electrode side voltages of the batteries to be tested; determining a second scatter diagram according to the negative side voltage slopes and the negative side voltages of the plurality of batteries to be tested; each point in the first scatter diagram corresponds to positive side voltage information of a battery to be tested, and each point in the second scatter diagram corresponds to negative side voltage information of the battery to be tested;
and the second determining module is used for determining a target battery of which the corresponding side voltage information meets the test condition from the plurality of batteries to be tested based on the non-discrete points in the first scatter diagram and the second scatter diagram.
9. An electronic device, comprising: a processor, a storage medium and a bus, the storage medium storing machine-readable instructions executable by the processor, the processor and the storage medium communicating via the bus when the electronic device is operating, the processor executing the machine-readable instructions to perform the steps of the battery side voltage testing method according to any one of claims 1 to 7.
10. A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the battery side voltage testing method according to any one of claims 1 to 7.
CN202210807422.4A 2022-07-11 2022-07-11 Battery side voltage testing method and device, electronic equipment and storage medium Active CN114859236B (en)

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CN202210807422.4A CN114859236B (en) 2022-07-11 2022-07-11 Battery side voltage testing method and device, electronic equipment and storage medium

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