CN105203967A - Power battery deterioration degree test method and test device - Google Patents
Power battery deterioration degree test method and test device Download PDFInfo
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- CN105203967A CN105203967A CN201510675153.0A CN201510675153A CN105203967A CN 105203967 A CN105203967 A CN 105203967A CN 201510675153 A CN201510675153 A CN 201510675153A CN 105203967 A CN105203967 A CN 105203967A
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- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 10
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 3
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Abstract
The invention relates to the technical field of power batteries, and provides a power battery deterioration degree test method and test device. The power battery deterioration degree test method comprises the steps that a periodic alternating signal is generated through a signal generator; the periodic alternating signal is converted into a current signal; the current signal is input positive and negative electrodes of a battery module; an output signal of the battery module is obtained; a relation between the periodic alternating signal and the output signal of the battery module is calculated according to the periodic alternating signal and the output signal of the battery module. The power battery deterioration degree test method and test device save the electric energy.
Description
Technical field
The present invention relates to electrokinetic cell field, particularly relate to a kind of method of testing and proving installation of electrokinetic cell degradation.
Background technology
At present, rapidly, the demand of electrokinetic cell is increasing, and the performance requirement of electrokinetic cell is more and more higher in domestic and international new-energy automobile development.At present, the application of the field such as electric automobile, electric tool electrokinetic cell be all multiple battery form battery system carry out work.Battery system is made up of multiple battery module, and battery module is made up of multiple battery cell again.Therefore battery with two side terminals is the important parameter describing electrokinetic cell performance.On the other hand, in use for some time, all can there is deterioration in performance to electrokinetic cell, therefore degradation test and assessment just seem extremely important.
Utilize in evaluation process in the echelon of battery, the conforming quality of electrokinetic cell is the key determining assembled battery performance, when battery consistency test, conventional method carries out sorting by the range of capacity of specifying, namely the battery selected reaches unanimity on capacity, when assembled battery, then the internal resistance and self-discharge performance etc. of battery are measured and sorting.Other method first adopts to carry out sorting by the range of capacity of specifying, then adopt the curve of charge and discharge process to compare, and chooses the satisfactory battery of deviation and be defined as one group.The common shortcoming of above two methods is all to need to carry out long discharge and recharge to electrokinetic cell, and waste a large amount of electric energy, the test duration is long, and occupation area of equipment is large, inefficiency.Battery charge and discharge process can produce a large amount of heat, affects the working environment in workshop, and because battery testing standard-required test environment temperature is very strict, need to purchase enough air-conditionings and lower the temperature, such air-conditioning wastes again a large amount of electric energy.
Given this, the defect overcome existing for the prior art is the art problem demanding prompt solution.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method of testing and the proving installation that can save the electrokinetic cell degradation of electric energy.
The present invention adopts following technical scheme:
The invention provides a kind of method of testing of electrokinetic cell degradation, it is characterized in that, the method for testing of this electrokinetic cell degradation comprises:
Produce periodically alternating signal;
Convert periodicity alternating signal to current signal;
Current signal is inputted the both positive and negative polarity of battery module;
Obtain the output signal of battery module;
According to the output signal of periodicity alternating signal and battery module, calculate the relation periodically between alternating signal and the output signal of battery module.
Preferably, periodically alternating signal comprises the combination in any of a kind of or these waveforms in square wave, triangular wave, sine wave, sawtooth wave, pseudo random signal, trapezoidal wave.
Preferably, battery module comprises at least one in lead-acid battery, ickel-cadmium cell, Ni-MH battery, lithium ion battery.
Preferably, the relation periodically between alternating signal and the output signal of battery module comprises cross correlation function, output signal and input signal Amplitude Ration, output signal and input signal phase differential and add, subtract, the computing such as multiplication and division, differential, integration.
Present invention also offers a kind of proving installation of electrokinetic cell degradation, comprising:
Signal generation device, signal generation device is for generation of periodicity alternating signal;
Chromacoder, chromacoder is used for receive periodic alternating signal, and converts this periodicity alternating signal to current signal, and current signal is inputed to the both positive and negative polarity of battery module;
Signal pickup assembly, signal pickup assembly for obtaining the output signal of battery module, and is passed to signal processing apparatus;
Signal processing apparatus, signal processing apparatus is used for the output signal transmitted according to periodicity alternating signal and signal pickup assembly, calculates the relation periodically between alternating signal and output signal.
Preferably, chromacoder is power amplifier.
Preferably, signal processing apparatus also comprises input/output module and/or communication interface.
Preferably, signal generation device is signal generator, can by hardware or software simulating.
Preferably, signal processing device is set to digital signal processor, single-chip microcomputer or digital machine.
Preferably, digital signal processor is TMS320F2812DSP application system plate or Omron programmable controller CP1H.
Compared with prior art, beneficial effect of the present invention is: in the present invention, the method of testing of electrokinetic cell degradation obtains periodically alternating signal, and convert periodicity alternating signal to current signal, then current signal inputted the both positive and negative polarity of battery module.Battery module produces output signal under the excitation of periodicity alternating signal.Obtain battery module output signal and calculate itself and the relation periodically between alternating signal, between this relation and the degradation of battery module, there is certain relation.The method of testing of the electrokinetic cell degradation therefore in the present invention does not need to carry out long-time discharge and recharge to battery module, thus saves electric energy.
[accompanying drawing explanation]
Fig. 1 is the schematic flow sheet of an embodiment of the method for testing of a kind of electrokinetic cell degradation of the present invention;
Fig. 2 is the structural representation of an embodiment of the proving installation of a kind of electrokinetic cell degradation in the present invention.
[embodiment]
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, do not limit the present invention.
In addition, if below in described each embodiment of the present invention involved technical characteristic do not form conflict each other and just can mutually combine.
Embodiment 1:
The embodiment of the present invention 1 provides a kind of method of testing of electrokinetic cell degradation.Fig. 1 is the schematic flow sheet of an embodiment of the method for testing of a kind of electrokinetic cell degradation of the present invention, and as shown in Figure 1, the method for testing of electrokinetic cell degradation comprises:
S11, generation periodically alternating signal.
Here periodicity alternating signal can be square wave, triangular wave, sine wave, sawtooth wave, square wave, pseudo random signal etc., also can be the combination in any of these waveforms.These signals bring the easy of subsequent step calculating.Such as, the present inventor finds that periodically alternating signal is the square wave of 3Hz, 30Hz, 300Hz or the triangular signal of 5Hz, 50Hz, 500Hz, all has good effect.The periodicity alternating signal of certain other types also can be applied in the present embodiment.
S12, convert periodicity alternating signal to current signal.
Periodically alternating signal directly can not be carried in the both positive and negative polarity of battery module to be measured, and just should can be loaded into the both positive and negative polarity of battery module by switching current signal.
S13, current signal is inputted the both positive and negative polarity of battery module.
In the present invention, battery module here both can be that single battery also can the electric battery of two or more battery composition.And the battery in battery module here can be arbitrarily based on the battery of electrochmical power source technology, in the present embodiment, battery module can be any one in the batteries such as lead-acid battery, ickel-cadmium cell, Ni-MH battery, lithium ion battery.
The output signal of S14, acquisition battery module.
Battery is as a kind of electrochemical system, and when there being different signal inputs, inside battery all can produce different electrochemical reactions, thus exports no output signal.The output signal representative of the different characteristic different qualities of battery, thus it can reflect the multifrequency nature parameter of inside battery to a great extent, comprises battery material formation, cell health state etc.Therefore with different marking currents, battery is encouraged, different battery response parameters can be obtained, reach the object of test battery performance.
S15, output signal according to periodicity alternating signal and battery module, calculate the relation periodically between alternating signal and the output signal of battery module.
In fact, for different battery modules, the relation periodically between alternating signal and the output signal of battery module is different, and similar relation represents battery module and has similar performance.Relation periodically between alternating signal and the output signal of battery module can be a variety of, such as the present inventor utilizes the cross correlation function of the output signal of periodically alternating signal and battery module, output signal and input signal Amplitude Ration, output signal and input signal phase differential and add, subtract, the computing such as multiplication and division, differential, integration is used as parameter, obtain the performance of no battery module, such as degradation.And the relation between similar periodicity alternating signal and the output signal of battery module represents that battery module has similar degradation, namely the two has good consistance, can elect one group as and be used as electrokinetic cell.
Different from needing to adopt the method for entirely filling the mode test battery module performance entirely put in prior art, the present invention is the ultimate principle based on battery module mathematical model, parameter identification is carried out to the mathematical model of battery module, selection cycle sexual intercourse varying signal is added on the positive and negative electrode of battery as input signal, then detect the output signal of battery.Further to the input signal of battery and the computation and analysis of output signal process, finally draw the performance parameter of battery, reach the object of test battery degradation.Owing to having avoided traditional long-time method of testing of battery being carried out to discharge and recharge, the method for the embodiment of the present invention can save electric energy in a large number, and has the advantage that the test duration is short, testing efficiency is high.
In addition, encourage battery module with different current signals, according to the response parameter of battery module, the method for analysis can adopt the optimized algorithm such as least square method, relevant function method, gradient method of automation field to determine the inner parameter of battery.Reach the object of test battery module performance.
In order to realize method of testing in the present invention, the invention provides the proving installation of electrokinetic cell degradation.Fig. 2 is the structural representation of an embodiment of the proving installation of a kind of electrokinetic cell degradation in the present invention, as shown in Figure 2, the proving installation of electrokinetic cell degradation comprises signal generation device, chromacoder, signal pickup assembly, signal processing apparatus.
Signal generation device is for generation of periodicity alternating signal.Particularly, in the present embodiment, signal generation device is signal generator.Signal generator is a kind of equipment that can provide various frequency, waveform and output level electric signal, can pass through hardware or software simulating output waveform.When measuring the amplitude characteristic of various telecommunication system or telecommunication apparatus, frequency characteristic, transport property and other electrical quantity, and the characteristic measuring components and parts with parameter time, be used as the signal source of testing or driving source.Preferably, signal generator is DDS(DirectDigitalFrequencySyn-thesis, direct digital synthesis technique) random waveform simple two-way signal generator, compare with traditional Direct frequency synthesizer, the indirect frequency combining method of phaselocked loop, DDS synthetic method has that frequency switching time is short, frequency resolution is high, phase change is continuous, easily realize advantages such as the more modulations of output signal.Certainly, it is easily understood that signal generation device can also be that other can produce the device of periodically alternating signal, the signal generator in the present embodiment is not limited to here.
Chromacoder is used for the periodicity alternating signal that Received signal strength generation device produces, and converts this periodicity alternating signal to current signal, and this current signal is inputed to the both positive and negative polarity of battery module.Particularly, in the present embodiment, chromacoder is power amplifier, such as 698E power amplifier.Periodicity alternating signal can not only be converted to current signal by power amplifier, also has the effect of amplifying power, is a kind of preferred scheme.Certainly it is easily understood that in other embodiments of the present invention, other devices with function switching signal also can be applied in the present invention.
Signal pickup assembly is for obtaining the output signal of battery module.Particularly, in the present embodiment, signal pickup assembly adopts AD7606 data acquisition module, and it has 16 precision 200Hz sample frequency, can gather the voltage signal of battery module and convert digital signal output to.Certainly it is easily understood that in other embodiments of the present invention, other devices with signals collecting function are also passable.
The output signal that signal processing apparatus transmits for receive periodic alternating signal and signal pickup assembly, calculates the relation periodically between alternating signal and output signal.Particularly, the signal processing device in the present embodiment is set to digital signal processor.Digital signal processor is made up of extensive or VLSI (very large scale integrated circuit) lamination, be used for the processor of certain signal processing tasks.It is needs for adapting to High speed real-time signal processing task and grows up gradually.Along with the development of integrated circuit technique and digital signal processing algorithm, the implementation method of digital signal processor is also in continuous change, and processing capacity improves constantly and expands.In the present embodiment, in order to realize computing function, digital signal processor have employed TMS320F2812DSP application system plate, TMS320F2812DSP application system strip has digital to analog converter and analog to digital converter, can the output signal transmitted of receive periodic alternating signal and signal pickup assembly, and calculate relation therebetween.In addition, TMS320F2812DSP application system plate can also produce corresponding periodically alternating signal by control signal generating means, is therefore a kind of signal processing apparatus preferably.In addition, find that Omron programmable controller CP1H is also a kind of preferred signal processor in an experiment, there is the function identical with TMS320F2812DSP application system plate.Certainly, in other embodiments of the present invention, other devices with signal processing function also can be applied in the present invention, such as single-chip microcomputer or digital machine.
In the present embodiment, preferably, the proving installation of electrokinetic cell degradation also comprises liquid crystal display and keyboard as input-output unit, so that control pick-up unit and check result, certainly, in other embodiments of the present invention, input-output unit can also be that other have the element of input/output function.In addition, in order to realize the communication with host computer, the proving installation of electrokinetic cell degradation further comprises communication interface, as ENC28J6 ethernet interface module.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a method of testing for electrokinetic cell degradation, is characterized in that, the method for testing of this electrokinetic cell degradation comprises:
Produce periodically alternating signal;
Convert described periodicity alternating signal to current signal;
By the both positive and negative polarity of described current signal input battery module;
Obtain the output signal of described battery module;
According to the output signal of described periodicity alternating signal and battery module, calculate the relation between described periodicity alternating signal and the output signal of battery module.
2. the method for testing of electrokinetic cell degradation as claimed in claim 1, is characterized in that: described periodicity alternating signal be square wave, triangular wave, sine wave, sawtooth wave, the combination in any of a kind of or these waveforms in trapezoidal wave, pseudo random signal.
3. the method for testing of electrokinetic cell degradation as claimed in claim 1, is characterized in that: described battery module comprises at least one in lead-acid battery, ickel-cadmium cell, Ni-MH battery, lithium ion battery.
4. the method for testing of the electrokinetic cell degradation as described in any one of claims 1 to 3, is characterized in that: the relation between described periodicity alternating signal and the output signal of battery module comprises cross correlation function, output signal and input signal Amplitude Ration, output signal and input signal phase differential and add, subtract, the computing such as multiplication and division, differential, integration.
5. a proving installation for electrokinetic cell degradation, is characterized in that, comprising:
Signal generation device, described signal generation device is for generation of periodicity alternating signal;
Chromacoder, described chromacoder for receiving described periodicity alternating signal, and converts this periodicity alternating signal to current signal, and described current signal is inputed to the both positive and negative polarity of described battery module;
Signal pickup assembly, described signal pickup assembly for obtaining the output signal of described battery module, and is passed to signal processing apparatus;
Signal processing apparatus, described signal processing apparatus is used for the output signal transmitted according to described periodicity alternating signal and signal pickup assembly, calculates the relation between described periodicity alternating signal and output signal.
6. the proving installation of electrokinetic cell degradation as claimed in claim 5, is characterized in that: described chromacoder is power amplifier.
7. the proving installation of electrokinetic cell degradation as claimed in claim 5, is characterized in that: described signal processing apparatus also comprises input/output module and/or communication interface.
8. the proving installation of electrokinetic cell degradation as claimed in claim 5, is characterized in that: described signal generation device is signal generator, can by hardware or software simulating.
9. the proving installation of the electrokinetic cell degradation as described in any one of claim 5 to 8, is characterized in that: described signal processing device is set to digital signal processor, single-chip microcomputer or digital machine.
10. the proving installation of electrokinetic cell degradation as claimed in claim 9, is characterized in that: described digital signal processor is TMS320F2812DSP application system plate or Omron programmable controller CP1H.
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| CN111965430A (en) * | 2020-08-26 | 2020-11-20 | 扬州大学 | Impedance measurement method and device capable of realizing low-voltage lithium battery power supply |
| US10879709B2 (en) | 2018-05-31 | 2020-12-29 | National Taipei University Of Technology | Power management system and operating method thereof |
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