CN110031548A - Inside battery health status detection device and method based on ultrasound - Google Patents
Inside battery health status detection device and method based on ultrasound Download PDFInfo
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- CN110031548A CN110031548A CN201910329979.XA CN201910329979A CN110031548A CN 110031548 A CN110031548 A CN 110031548A CN 201910329979 A CN201910329979 A CN 201910329979A CN 110031548 A CN110031548 A CN 110031548A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/07—Analysing solids by measuring propagation velocity or propagation time of acoustic waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/11—Analysing solids by measuring attenuation of acoustic waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/36—Detecting the response signal, e.g. electronic circuits specially adapted therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
- G01N29/4409—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by comparison
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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]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
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- G01N2291/00—Indexing codes associated with group G01N29/00
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- G01N2291/00—Indexing codes associated with group G01N29/00
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- G—PHYSICS
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- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/048—Transmission, i.e. analysed material between transmitter and receiver
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Abstract
The application provides inside battery health status detection device and method based on transmission ultrasonic wave, and inside battery health status detection device and method based on ultrasonic reflections.Ultrasound data dispersion degree of the ultrasonic signal that detection device and method of the invention is received by the test point of the ultrasonic signal that receives of test point close to the center of mesuring battary and the center for deviateing mesuring battary in terms of ultrasonic wave waveform, ultrasonic wave flight time and ultrasonic intensity indicates the inside battery health status of mesuring battary, it is used directly for qualitatively or quantitatively judging the inside health status of old and useless battery, utilizes and guidance is provided for the classification of old and useless battery and echelon.Detection device and method of the invention does not damage battery, and high sensitivity, structure is simple, and at low cost, degree of testing the speed is fast, and detection process is simple, and easy to operate, applicability is wide.
Description
Technical field
The present invention relates to battery technology fields, and in particular to inside battery health status detection device based on ultrasound and
Method.The detection device and method are particularly applicable to screen retired lithium ion battery to carry out secondary use.
Background technique
As new-energy automobile market welcomes eruptive growth, most crucial component lithium-ion-power cell is initially entered greatly
Scale scraps the date of retirement.Retired power battery itself still retains 80% or so battery capacity, carries out secondary benefit after being recycled
With can save a large sum of economic cost and problem of environmental pollution can be solved.There may be bulging, hair during service for power battery
The excessively high all kinds of Problem of Failure of soft, leakage, performance degradation, temperature, so strong firstly the need of the inside to retired lithium ion battery
Health state is detected, and the bad battery that there is impaired and defect, the battery that recycling has secondary use to be worth are rejected.Secondly as
The difference of Service Environment, the health status and remaining life consistency of retired lithium ion battery are low, if to retired lithium ion battery
Examination is not added and directly recombinates and carries out secondary use together, will lead to short -board effect and safety problem.Therefore retired lithium from
Before sub- battery secondary use, it is necessary to carry out detection screening, pick out the good and more consistent retired lithium ion of comprehensive performance
Battery carries out secondary use.
Battery is laminated or is wound by the positive electrode, the negative electrode and the separator, and inside battery includes positive and negative anodes active material, bonding
The a variety of materials such as agent, electrolyte, conductive agent, many kinds of, it is fine that structure is complicated, accurately to assess battery health status and
Remaining life usually takes time and effort, very difficult.At present to the detection main method of lithium ion battery have constant current method of testing,
Invariable power method of testing, pulse testing method, testing impedance method, Current integrating method, Kalman filtering method, neural network etc..These
Method is analyzed and is handled mainly for the electrical parameter variation of lithium ion battery, and there are at high cost, time-consuming, it is big etc. to be lost
Problem.Increase as the whole world puts into the research of lithium ion battery, lithium ion battery technology is quickly grown, and prepares lithium ion battery
Technique continue to optimize, energy density is continuously improved, and cost constantly reduces.If in the detection and screening of retired lithium ion battery
Stage expends a large amount of manpower and material resources, and cost increase does not have competitiveness, then in economy compared with the lithium ion battery of new production
On lose the meaning of battery recycling secondary use.But it if not recycling retired lithium ion battery, is lost in environmental protection
The justice that should have of battery recycling secondary use is gone.
Ultrasonic Detection Method is the interaction using ultrasonic wave and test specimen, right by the ultrasonic wave of research transmission, reflection
Test specimen carries out the detection of gross imperfection detection, geometrical property measurement, institutional framework and mechanical property variation and the detection skill of characterization
Art.Ultrasonic wave penetration capacity is strong, can carry out non-destructive testing, not needed to test specimen to the test specimen internal flaw within the scope of larger thickness
It is disassembled, has the advantages that fast and easy, at low cost.Has the existing skill that ultrasonic Detection Method is applied to battery detecting
Art, such as Chinese patent application CN 106772063 A (title " a kind of monitoring charge states of lithium ion battery and health status
Method and device thereof ", publication date on May 31st, 2017) and 106979761 A of Chinese patent application CN (title " a kind of lithium from
The detection method of each level thickness of sub- inside battery and surface topography ", publication date on July 25th, 2017).But these batteries ultrasound
Wave detection technique does not account for the difference that each position of battery responds ultrasonic wave, and therefore, existing technology still has much room for improvement.
Summary of the invention
The purpose of the present invention is to provide inside battery health status detection device based on ultrasound and methods, pass through ratio
Compared with the transmission ultrasonic wave or reflection signal in battery center region and the transmission ultrasonic wave of battery center neighboring area or reflection signal
Difference, to judge the inside battery health status of battery.
Therefore, in a first aspect, the present invention provides a kind of inside battery health status detection dress based on transmission ultrasonic wave
It sets, which includes:
Ultrasonic probe, battery carrying and mobile unit and computer unit, the ultrasonic probe include ultrasonic wave transmitting
Probe and ultrasonic wave receiving transducer；
The ultrasonic wave transmitting probe is arranged to the first detection faces towards mesuring battary, for super to mesuring battary transmitting
Acoustic signals, the ultrasonic wave receiving transducer are arranged to second detection faces opposite with the first detection faces towards mesuring battary,
For receiving the ultrasonic signal transmitted from mesuring battary；
Battery carrying is with mobile unit for carrying the battery and making the battery relative to the ultrasonic wave transmitting probe
With ultrasonic wave receiving transducer is mobile or rotation so that the ultrasonic wave transmitting probe is along the detection path of setting to the first detection faces
On multiple test points emit ultrasonic signal, and ultrasonic wave receiving transducer along the detection path of setting from the second detection faces
Upper corresponding multiple test points receive the ultrasonic signal of transmission；
The computer unit and the ultrasonic wave transmitting probe, the ultrasonic wave receiving transducer and battery carrying and mobile unit
Constitute telecommunication connection, for control the ultrasonic wave transmitting probe and the ultrasonic wave receiving transducer emit respectively ultrasonic signal and
The ultrasonic signal for receiving transmission controls battery carrying and moves with mobile unit along the detection path of setting, and to reception
The transmission ultrasonic wave signal arrived carries out statistical analysis.
The first detection faces and the second detection faces of mesuring battary are that most easily embodiment inside battery is equal depending on cell shapes
The detection faces of even property.For rectangle and pouch type battery battery, the first detection faces and the second detection faces are respectively two phases of battery
Pair maximum square surface.The line of corresponding multiple test points on multiple test points and the second detection faces in first detection faces
It is generallyperpendicular with the first detection faces and the second detection faces.
For cylindrical battery, the first detection faces and the second detection faces are respectively that two of the cylindrical side of battery are opposite
Half side-view.The line of corresponding multiple test points is substantially located on multiple test points and the second detection faces in first detection faces
The diametrical direction of cylinder.
The center of battery refers to the geometric center of battery.For rectangle and pouch type battery battery, the center about position of battery
In the diagonal line intersection point of the battery body of rectangular shape.For cylindrical battery, the center of battery is approximately located i cylindrical electricity
The midpoint of the two disc center of circle institute line sections up and down of pond ontology.
To the quantity and distribution of multiple test points in the first detection faces and corresponding multiple test points in the second detection faces
There is no limit.The particular number of these test points is depending on the detection accuracy of the size of the detection faces of battery and needs.
The specific of these test points is distributed also depending on the detection accuracy of the size of the detection faces of battery and needs, but usually exists
It is uniformly distributed to form detection lattice array in detection faces.
According to these test points at a distance from the center of mesuring battary, these test points can be defined as close to electricity to be measured
The test point in the center in pond and the central test point for deviateing mesuring battary.Which specific test point is defined as close to mesuring battary
Center test point, which test point be defined as deviate mesuring battary center test point, can according to the needs of detection and
Setting, but generally, the test point closer to detection faces edge more deviates the center of mesuring battary.
In second aspect, the present invention provides a kind of inside battery health status detection device based on ultrasonic reflections, should
Device includes:
Ultrasonic probe, battery carrying and mobile unit and computer unit, the ultrasonic probe have both ultrasonic wave transmitting
Function and ultrasonic wave receive capabilities；
The ultrasonic probe is arranged to the detection faces towards mesuring battary, for emitting ultrasonic signal to mesuring battary
And receive the ultrasonic signal reflected from mesuring battary；
Battery carrying is with mobile unit for carrying the battery and keeping the battery mobile relative to the ultrasonic probe
Or rotation, so that the ultrasonic probe emits ultrasonic signal to multiple test points in the detection faces along the detection path of setting
And receive the ultrasonic signal of reflection；
The computer unit constitutes telecommunication with mobile unit with the ultrasonic probe and battery carrying and connect, for controlling
It makes ultrasonic probe transmitting ultrasonic signal and receives the ultrasonic signal of reflection, control battery carrying and mobile unit edge
The detection path of setting is mobile, and carries out statistical analysis to the signal that reflects ultrasonic wave received.
The detection faces of mesuring battary are that the detection faces of inside battery uniformity are most easily embodied depending on cell shapes.For
Rectangular battery and pouch type battery, detection faces are two opposite one of maximum square surfaces of battery.For cylindrical battery, inspection
Survey face is the cylindrical side of battery.
The center of battery refers to the geometric center of battery.For rectangular battery, the center of battery is approximately located i cuboid
The diagonal line intersection point of the battery body of shape.For cylindrical battery, the center of battery is approximately located i the upper of cylindrical battery ontology
The midpoint of lower two disc center of circle institute line sections.
There is no limit for quantity and distribution to multiple test points in detection faces.The particular number of these test points is according to electricity
Depending on the size of the detection faces in pond and the detection accuracy of needs.The specific distribution of these test points is also according to the detection of battery
Depending on the size in face and the detection accuracy of needs, but usually it is uniformly distributed to form detection lattice array in detection faces.
According to these test points at a distance from the center of mesuring battary, these test points can be defined as close to electricity to be measured
The test point in the center in pond and the central test point for deviateing mesuring battary.Which specific test point is defined as close to mesuring battary
Center test point, which test point be defined as deviate mesuring battary center test point, can according to the needs of detection and
Setting, but generally, the test point closer to detection faces edge more deviates the center of mesuring battary.
In the third aspect, the present invention provides a kind of inside battery based on transmission ultrasonic wave using first aspect present invention
The method that health status detection device assesses inside battery health status, method includes the following steps:
S1: mesuring battary is placed in battery carrying and mobile unit；
S2: the multiple test points and the second detection in the first detection faces of the mesuring battary are selected by the computer unit
These test points are defined as by corresponding multiple test points on face according to these test points at a distance from the center of mesuring battary
Test point close to the center of the test point and deviation mesuring battary in the center of mesuring battary, and it is arranged the first of the mesuring battary
The detection path of corresponding multiple test points on multiple test points and the second detection faces in detection faces；
S3: battery carrying and mobile unit movement or rotation are made by the computer unit, so that the mesuring battary phase
Or rotation mobile for the ultrasonic wave transmitting probe and the ultrasonic wave receiving transducer, so that the ultrasonic wave transmitting probe is along setting
It detects path and ultrasonic signal is emitted to multiple test points in the first detection faces, and the ultrasonic wave receiving transducer is along setting
Detect the ultrasonic signal that path corresponding multiple test points from the second detection faces receive transmission；
S4: the transmission ultrasonic wave that multiple test points corresponding from the second detection faces are received by the computer unit
Signal carries out statistical analysis, obtains transmission ultrasonic wave signal and deviation that the test point close to the center of mesuring battary receives
The transmission ultrasonic wave signal that the test point in the center of mesuring battary receives is in ultrasonic wave waveform, ultrasonic wave flight time and ultrasound
Ultrasound data dispersion degree in terms of intensity of wave, the data discrete degree indicate the inside battery health status of mesuring battary,
Wherein the data discrete degree is bigger, and health status is poorer inside mesuring battary.
In fourth aspect, the present invention provides a kind of inside battery based on ultrasonic reflections using second aspect of the present invention
The method that health status detection device assesses inside battery health status, method includes the following steps:
S1: mesuring battary is placed in battery carrying and mobile unit；
S2: selecting multiple test points in the detection faces of the mesuring battary by the computer unit, according to these detections
Point with mesuring battary center at a distance from, by these test points be defined as close to mesuring battary center test point and deviation to
Survey the test point in the center of battery, and the detection path for the multiple test points being arranged in the detection faces of the mesuring battary；
S3: keeping battery carrying and mobile unit mobile or rotation by the computer unit so that the battery relative to
The ultrasonic probe is mobile or rotates, so that the ultrasonic probe is along the detection path of setting to multiple detections in the detection faces
Point transmitting ultrasonic signal and the ultrasonic signal for receiving reflection；
S4: signal is reflected ultrasonic wave to what multiple test points corresponding from detection faces received by the computer unit
Carry out statistical analysis, obtain close to mesuring battary center test point receive reflect ultrasonic wave signal and deviate it is to be measured
It is strong in ultrasonic wave waveform, ultrasonic wave flight time and ultrasonic wave that the test point in the center of battery received reflects ultrasonic wave signal
The ultrasound data dispersion degree of aspect is spent, which indicates the inside battery health status of mesuring battary, wherein
The data discrete degree is bigger, and health status is poorer inside mesuring battary.
In the method for assessment inside battery health status of the invention, as needed depending on, ultrasonic wave used can be with
For longitudinal wave, or shear wave.Ultrasonic frequency used, ultrasonic transducer type, ultrasonic probe type, ultrasonic wave are visited
Head can select whether detecting face contact with mesuring battary according to battery behavior, to be optimal effect.It usually selects in detection path
It is selected as shortest path, the i.e. the smallest path of detection time.Mesuring battary includes all kinds of packaged types such as cylinder, rectangle, Soft Roll
Battery, also include the battery of the various types of materials such as binary material, ternary material.Mesuring battary can be various types of other battery,
Preferably lithium ion battery.The analysis that the statistical analysis of ultrasonic signal can be developed by commercial analysis software or specially
Software is realized.
It further include by identical in the preferred embodiment of the method for assessment inside battery health status of the invention
Step detects the ultrasound data dispersion degree of new battery, and by the ultrasound data dispersion degree of mesuring battary with
The ultrasound data dispersion degree of new battery is compared, and two of them ultrasound data dispersion degree difference is bigger, table
Health status is poorer inside bright mesuring battary.
It further include identification ultrasonic wave in the preferred embodiment of the method for assessment inside battery health status of the invention
The significant abnormal test point of signal, the test point represent the position of major defect inside mesuring battary, such as leakage, bubble, disconnected
The defects of splitting, and on the basis of excluding accidentally with detection error, determine the mesuring battary for unqualified battery.
It further include verification test in the preferred embodiment of the method for assessment inside battery health status of the invention,
It takes part mesuring battary to carry out electricity, chemistry, materialogy detection, more accurately obtains state-of-charge, health status, remaining life
Etc. data, and the foundation of the ultrasound data dispersion degree of these data and mesuring battary be associated with, so as to it is subsequent more accurately
Assess inside battery health status in ground.
It further include according to secondary benefit in the preferred embodiment of the method for assessment inside battery health status of the invention
With scene and demand, screening criteria is determined, the battery that the health status of secondary use requirement is not achieved is shaved, is up to
The battery of health status carries out secondary use.
Beneficial effects of the present invention:
The first, the invention proposes brand-new detection thinkings, are received by the test point in the center close to mesuring battary
Ultrasonic signal and deviate mesuring battary center the ultrasonic signal that receives of test point in ultrasonic wave waveform, ultrasonic wave
Ultrasound data dispersion degree in terms of flight time and ultrasonic intensity indicates the inside battery health status of mesuring battary,
It is used directly for qualitatively or quantitatively judging the inside health status of old and useless battery, the internal state one including different old and useless batterys
Cause property utilizes for the classification of old and useless battery and echelon and provides guidance.
The second, ultrasonic wave penetration power is strong, high sensitivity, can accurately reflect the structure change of inside battery material, with
The variation of material structure itself judges that inside battery health status is more acurrate and accurate.
Third, the inside battery health status detection device and method of the invention based on ultrasonic technology have and do not damage
The advantages of hurting battery, and traditional detection method will lose battery life to battery progress charge and discharge.
4th, ultrasonic detecting equipment and electrical detection equipment structure compared are simple, at low cost.
5th, ultrasound examination speed is fast, and detection process is simple, easy to operate, and applicability is wide.
Detailed description of the invention
Fig. 1 is the schematic diagram of the inside battery health status detection according to the present invention based on transmission ultrasonic wave；
Fig. 2 is the rectangle lithium ion battery ultrasound examination schematic diagram according to one embodiment of the invention；
Fig. 3 is the column lithium ion battery ultrasound examination schematic diagram according to one embodiment of the invention.
Specific embodiment
Below by specific embodiment and in conjunction with attached drawing, invention is further described in detail.
The materials such as factory inside battery positive and negative anodes are evenly distributed.During battery is on active service, the continuous charge and discharge of battery, battery
The mechanical performance that the electrochemical motion of inner ion and electronics will lead to battery material changes.When battery by taking for a long time
When labour, inside is also possible to situations such as will appear bubble, defect, leakage, degradation, and battery temperature is unevenly distributed when being on active service in addition
It is even, cause discontinuity of materials further to increase.Therefore the internal material uniformity decline of retired battery, inside battery health shape
State deteriorates.Generally, battery center region is faster than the loss of central peripheral field capacity, damage of material degree and speed ratio edge
Fastly.This is because electric current is unevenly distributed in inside battery, and the electric field among battery is bigger, therefore central area when battery works
The temperature in domain is higher, is easier to cause the variation of material composition and form, causes the capacitance loss of middle section more.
Bulk modulus, modulus of shearing and density according to THE THEORY OF ELASTIC WAVE, in the spread speed and material of ultrasonic wave
It is closely related.Therefore, the ultrasonic signals such as the different wave shape of ultrasonic wave, flight time (ToF), total signal strength and electricity can be passed through
The inside health status in pond establishes association.
Based on this, the present invention provides inside battery health status detection device based on ultrasound and methods, pass through system
The ultrasonic signal of meter comparative cell middle section and battery center neighboring area are in ultrasonic wave different wave shape, flight time
(ToF), the difference of the ultrasonic signals data such as total signal strength is a kind of nothing to judge the inside battery health status of battery
Damage detection method.
The term as used herein " inside battery health status " refer to used mesuring battary with its be not used before compared with,
The change of internal chemical component and/or physical structure, such as battery internal defect, density of material and elasticity modulus change, material
Material composition mutually changes with object, battery capacity is lost etc..
It is of the invention based on ultrasonic wave due to that can occur to transmit when ultrasonic wave encounters test specimen such as battery and/or reflect
Inside battery health status detection device and method specifically can transmission based on ultrasound or based on ultrasound anti-
It penetrates.
The principle of inside battery health status detection based on transmission ultrasonic wave of the invention is as shown in Figure 1.It is shown in figure
The sectional view of battery, ultrasonic wave transmitting probe T and ultrasonic wave receiving transducer R, can be with respectively close to and towards battery upper and lower surface
The shiftable haulage line along test point a-b-c-d and a'-b'-c'-d' moves on battery surface respectively is detected.Ultrasonic wave transmitting
The ultrasonic wave that probe T issues appropriate frequency is perforated through battery, and ultrasonic wave receiving transducer R receives transmitted wave, obtain ultrasonic wave waveform,
The ultrasound datas such as ultrasonic wave flight time (ToF) and ultrasonic intensity.Inside battery based on ultrasonic reflections of the invention
The principle of health status detection is also similar, but ultrasonic wave transmitting probe T and ultrasonic wave receiving transducer R are combined into one, referred to as ultrasonic
Wave probe has the function of emitting ultrasonic wave simultaneously and receives ultrasonic wave.
As shown in Figure 1, middle part gray area schematically shows affected area, it is in middle part that the color the deep then impaired more serious
The trend to become smaller to surrounding.Inside battery a-quadrant (representing battery center neighboring area) shown in figure and B area (represent electricity
Pond middle section) due to extent of damage difference, material composition is mutually different with object, and density of material and elasticity modulus change
Become.Therefore, when ultrasonic wave propagates to inside battery from battery surface, when through the waveform of A and the ultrasonic wave of B area, flight
Between and intensity it is different.Retired old and useless battery capacitance loss is bigger, A, B area ultrasonic signal difference be more obvious.Pass through
Statistical analysis is carried out to the ultrasonic signal data of A, B area and obtains ultrasound data dispersion degree.The ultrasound data from
The consistency of the inside battery of the degree of dissipating instruction mesuring battary, i.e. instruction inside battery health status, the ultrasound data are discrete
Degree is bigger, and health status is poorer inside mesuring battary.In general, the ultrasound data dispersion degree of new battery is very low, therefore, give up
The middle section and central peripheral region ultrasound data dispersion degree of used batteries are used directly for qualitatively or quantitatively judging useless
The inside health status of used batteries, the internal state consistency including different old and useless batterys is the classification of old and useless battery and secondary
Offer guidance is provided.Can also obtain the ultrasound data dispersion degree of new battery, and with the ultrasound data of mesuring battary from
Scattered degree is compared, and two of them ultrasound data dispersion degree difference is bigger, shows that health status is got over inside mesuring battary
Difference.
In some cases, obvious shortcoming, bubble, Li dendrite etc. are likely to occur inside old and useless battery to be badly damaged situation,
As shown in figure 1 shown in the region C, ultrasonic signal will occur significant abnormal.Carried out by " significant abnormal " can be defined as needed, example
Ultrasonic signal value is such as defined as more than normal value 10%, 20%, 50% or higher.It is aobvious defined in occurring in ultrasonic signal
When writing abnormal, it can be determined that the old and useless battery is unqualified battery.In addition, the region D is tab region, the Nomenclature Composition and Structure of Complexes and electricity
Bulk material difference in pond is larger, therefore is not used in data discrete degree from the ultrasound data that the test point for being located at tab region obtains
Analysis, but its ultrasound data can be compared with healthy battery, if difference is larger, tab region be likely to occur therefore
Barrier also may determine that battery is unqualified battery.
Exemplary illustration is made to the present invention below by way of non-limiting embodiment.
Embodiment 1: the ultrasound examination of retired rectangle lithium ion battery
Referring to fig. 2, the ultrasound examination schematic diagram of retired rectangle lithium ion battery is shown.
Detection device includes that ultrasonic probe, battery carrying and mobile unit and computer unit, ultrasonic probe include
Ultrasonic wave transmitting probe and ultrasonic wave receiving transducer, but for simplicity, Fig. 2 does not show battery carrying and mobile unit and calculating
Machine unit, and it is showing mesuring battary and ultrasonic wave transmitting probe T and ultrasonic wave receiving transducer R and relevant ultrasonic wave
Impulse ejection-receiver.Ultrasonic wave transmitting probe T and ultrasonic wave receiving transducer R is connect with ultrasonic pulse send-receive device,
The ultrasonic wave that transmitting ultrasonic wave and reception are transmitted from mesuring battary respectively.And ultrasonic pulse send-receive device and computer list
Member connects and composes telecommunication connection (Fig. 2 is not shown), is controlled it by computer unit so that ultrasonic wave transmitting probe T and ultrasound
Wave receiving transducer R emits ultrasonic wave respectively and receives the ultrasonic wave transmitted from mesuring battary.
Mesuring battary can be placed in battery carrying and mobile unit by tester.Battery carrying and mobile unit and computer
Unit constitute telecommunication connection (Fig. 2 is not shown), can be moved along X, Y, Z axis, according to setting detection path and using be suitable for
Movement speed carries out ultrasound detection to battery.Tester's maneuvering calculation machine unit makes battery carrying and mobile unit in X-axis, Y-axis
And/or Z axis moves and/or the distance up and down of appropriate adjustment ultrasonic wave transmitting probe T and ultrasonic wave receiving transducer R, so that ultrasonic
Wave transmitting probe T and ultrasonic wave receiving transducer R or more relatively close to and towards battery upper and lower major surfaces, i.e. the first detection faces
(as shown in the dotted line frame of Fig. 2) and the second detection faces (Fig. 2 is not shown).
Tester can select multiple test points in the first detection faces of mesuring battary by computer unit (Fig. 2 is shown)
With multiple test points corresponding in the second detection faces (Fig. 2 is not shown).Uniformly divide as shown in Fig. 2, these test points form array
Cloth is in detection faces.Tester can be by detection demand, by computer unit, according to the center of these test points and mesuring battary
Distance, by these test points be defined as close to mesuring battary center test point and deviate mesuring battary center detection
Point.Corresponding multiple detections on multiple test points and the second detection faces in first detection faces of the settable mesuring battary of tester
The detection path of point.As shown in Fig. 2, detection path is set as turning left since the test point in the upper right corner and be moved to along multiple S-shapeds
The test point in the lower left corner.It is of course also possible to other detection routes are arranged, for example, since the test point in the upper right corner it is more toward lower edge
A S-shaped is moved to the test point in the lower left corner.Common principle is that detection path is most short, and detection time is minimum.
It is then detected that person's maneuvering calculation machine unit makes, battery is carried and mobile unit is mobile in X and Y-axis, so that electricity to be measured
Pond is mobile relative to ultrasonic wave transmitting probe T and ultrasonic wave receiving transducer R, so that detection of the ultrasonic wave transmitting probe T along setting
Path emits ultrasonic signal to multiple test points in the first detection faces, and ultrasonic wave receiving transducer R is along the detection of setting
Path corresponding multiple test points from the second detection faces receive the ultrasonic signal of transmission.
Finally, the transmission that tester receives multiple test points corresponding from the second detection faces by computer unit
Ultrasonic signal carries out statistical analysis.Computer unit shows that the test point close to the center of mesuring battary receives super
The ultrasonic signal that acoustic signals and the central test point for deviateing mesuring battary receive flies in ultrasonic wave waveform, ultrasonic wave
Ultrasound data dispersion degree in terms of time and ultrasonic intensity.Tester can assess mesuring battary by data discrete degree
Inside battery health status.Data discrete degree is bigger, and health status is poorer inside mesuring battary.
The detection based on transmission ultrasonic wave is shown in the present embodiment, makees in detection device and detection method suitably modified
In the case of be also applied for the detection based on ultrasonic reflections.
In addition, Fig. 2 shows a column test point (black color dots) of neighbouring tab, tester can pass through the saturating of these test points
The whether obvious exception of ultrasonic signal is penetrated to judge whether tab region breaks down.
Embodiment 2
Referring to Fig. 3, the ultrasound examination schematic diagram of retired rectangle lithium ion battery is shown.
Testing principle is same as Example 2, is also based on transmission ultrasonic wave.Detection device and detection method and embodiment 2
It is similar.But there is difference below.Ultrasonic wave transmitting probe T and ultrasonic wave receiving transducer R is located at the cylinder table of battery
On face, and diametrically.First detection faces and the second detection faces are respectively opposite half side of two of the cylindrical side of battery
Face, the line of corresponding multiple test points is substantially located at cylinder on the multiple test points and the second detection faces in the first detection faces
Diametrical direction.Tester's maneuvering calculation machine unit rotates battery carrying with mobile unit, so that mesuring battary is relative to super
Sound wave transmitting probe T and ultrasonic wave receiving transducer R rotation, so that ultrasonic wave transmitting probe T is along the detection path of setting to first
Multiple test points in detection faces emit ultrasonic signal, and ultrasonic wave receiving transducer R along the detection path of setting from second
Corresponding multiple test points receive the ultrasonic signal of transmission in detection faces.
The detection based on transmission ultrasonic wave is shown in the present embodiment, makees in detection device and detection method suitably modified
In the case of be also applied for the detection based on ultrasonic reflections.
In addition, Fig. 3 shows a column test point (other than dotted line) of neighbouring upper and lower tab, tester can be detected by these
Whether the transmission ultrasonic wave signal put obviously judges whether tab region breaks down extremely.
Use above specific example is expounded the present invention, is merely used to help understand the present invention, not to
The limitation present invention.The design of those skilled in the art according to the present invention can also be made and several simply push away
It drills, deform or replaces.These are deduced, deformation or alternative are also fallen into scope of the presently claimed invention.
Claims (8)
1. a kind of inside battery health status detection device based on transmission ultrasonic wave, the device include:
Ultrasonic probe, battery carrying and mobile unit and computer unit, which includes ultrasonic wave transmitting probe
With ultrasonic wave receiving transducer；
The ultrasonic wave transmitting probe is arranged to the first detection faces towards mesuring battary, for emitting ultrasonic wave to mesuring battary
Signal, the ultrasonic wave receiving transducer are arranged to second detection faces opposite with the first detection faces towards mesuring battary, are used for
Receive the ultrasonic signal transmitted from mesuring battary；
Battery carrying is used to carry the battery and makes the battery relative to the ultrasonic wave transmitting probe and be somebody's turn to do with mobile unit
Ultrasonic wave receiving transducer is mobile or rotates, so that the ultrasonic wave transmitting probe is along the detection path of setting in the first detection faces
Multiple test points emit ultrasonic signals, and the ultrasonic wave receiving transducer along the detection path of setting from phase in the second detection faces
The multiple test points answered receive the ultrasonic signal of transmission；
The computer unit and the ultrasonic wave transmitting probe, the ultrasonic wave receiving transducer and battery carrying are constituted with mobile unit
Telecommunication connection emits ultrasonic signal and reception for controlling the ultrasonic wave transmitting probe and the ultrasonic wave receiving transducer respectively
The ultrasonic signal of transmission controls battery carrying and moves with mobile unit along the detection path set, and to receiving
Transmission ultrasonic wave signal carries out statistical analysis.
2. a kind of inside battery health status detection device based on ultrasonic reflections, the device include:
Ultrasonic probe, battery carrying and mobile unit and computer unit, the ultrasonic probe have both ultrasonic wave emission function
With ultrasonic wave receive capabilities；
The ultrasonic probe is arranged to the detection faces towards mesuring battary, for emitting ultrasonic signal to mesuring battary and connecing
Receive the ultrasonic signal reflected from mesuring battary；
Battery carrying is used to carry the battery and keeps the battery mobile relative to the ultrasonic probe or turn with mobile unit
It is dynamic, so that the ultrasonic probe to multiple test points transmitting ultrasonic signal in the detection faces and connects along the detection path of setting
Receive the ultrasonic signal of reflection；
The computer unit constitutes telecommunication with mobile unit with the ultrasonic probe and battery carrying and connect, for controlling this
Ultrasonic probe emits the ultrasonic signal of ultrasonic signal and reception reflection, controls battery carrying with mobile unit along setting
Detection path it is mobile, and statistical analysis is carried out to the signal that reflects ultrasonic wave received.
3. a kind of inside battery health status detection device assessment using according to claim 1 based on transmission ultrasonic wave
The method of inside battery health status, the described method comprises the following steps:
S1: mesuring battary is placed in battery carrying and mobile unit；
S2: it is selected on multiple test points and the second detection faces in the first detection faces of the mesuring battary by the computer unit
These test points are defined as close by corresponding multiple test points according to these test points at a distance from the center of mesuring battary
The test point in the center of mesuring battary and the central test point for deviateing mesuring battary, and the first detection of the mesuring battary is set
The detection path of corresponding multiple test points on multiple test points and the second detection faces on face；
S3: keeping battery carrying and mobile unit mobile or rotation by the computer unit so that the mesuring battary relative to
The ultrasonic wave transmitting probe and ultrasonic wave receiving transducer movement or rotation, so that detection of the ultrasonic wave transmitting probe along setting
Path emits ultrasonic signal to multiple test points in the first detection faces, and the ultrasonic wave receiving transducer is along the detection of setting
Path corresponding multiple test points from the second detection faces receive the ultrasonic signal of transmission；
S4: the transmission ultrasonic wave signal that multiple test points corresponding from the second detection faces are received by the computer unit
Statistical analysis is carried out, obtains transmission ultrasonic wave signal and deviate to be measured that the test point close to the center of mesuring battary receives
The transmission ultrasonic wave signal that the test point in the center of battery receives is strong in ultrasonic wave waveform, ultrasonic wave flight time and ultrasonic wave
The ultrasound data dispersion degree of aspect is spent, which indicates the inside battery health status of mesuring battary, wherein
The data discrete degree is bigger, and health status is poorer inside mesuring battary.
4. a kind of inside battery health status detection device assessment using according to claim 2 based on ultrasonic reflections
The method of inside battery health status, the described method comprises the following steps:
S1: mesuring battary is placed in battery carrying and mobile unit；
S2: selecting multiple test points in the detection faces of the mesuring battary by the computer unit, according to these test points with
These test points are defined as the test point and deviation electricity to be measured close to the center of mesuring battary by the distance in the center of mesuring battary
The test point in the center in pond, and the detection path for the multiple test points being arranged in the detection faces of the mesuring battary；
S3: battery carrying and mobile unit movement or rotation are made by the computer unit, so that the battery is super relative to this
Sonic probe is mobile or rotates, so that the ultrasonic probe sends out multiple test points in the detection faces along the detection path of setting
It penetrates ultrasonic signal and receives the ultrasonic signal of reflection；
S4: the signal that reflects ultrasonic wave that multiple test points corresponding from detection faces receive is carried out by the computer unit
Statistical analysis, obtain close to mesuring battary center test point receive reflect ultrasonic wave signal and deviate mesuring battary
Center test point receive reflect ultrasonic wave signal in ultrasonic wave waveform, ultrasonic wave flight time and ultrasonic intensity side
The ultrasound data dispersion degree in face, the data discrete degree indicate the inside battery health status of mesuring battary, wherein the number
Bigger according to dispersion degree, health status is poorer inside mesuring battary.
5. the method for assessment inside battery health status according to claim 3 or 4, which is characterized in that further include passing through
Identical step detects the ultrasound data dispersion degree of new battery, and by the ultrasound data of the mesuring battary
Dispersion degree is compared with the ultrasound data dispersion degree of new battery, and two of them ultrasound data dispersion degree is poor
It is different bigger, show that health status is poorer inside ultrasonic wave mesuring battary.
6. the method for assessment inside battery health status according to claim 3 or 4, which is characterized in that further include identification
The significant abnormal test point of ultrasonic signal, the test point represent the position of major defect inside the mesuring battary, and
It excludes accidentally and on the basis of detection error, determines the mesuring battary for unqualified battery.
7. the method for assessment inside battery health status according to claim 3 or 4, which is characterized in that further include verifying
Test takes the part mesuring battary to carry out electricity, chemistry, materialogy detection, more accurately obtains state-of-charge, healthy shape
The data such as state, remaining life, and these data are associated with the foundation of the ultrasound data dispersion degree of the mesuring battary,
Inside battery health status is more accurately assessed so as to subsequent.
8. the method for assessment inside battery health status according to claim 3 or 4, which is characterized in that further include basis
Secondary use scene and demand, determine screening criteria, and the battery that the health status of secondary use requirement is not achieved is shaved,
The battery for being up to health status carries out secondary use.
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