CN107843855A - Accumulator internal resistance detecting system - Google Patents
Accumulator internal resistance detecting system Download PDFInfo
- Publication number
- CN107843855A CN107843855A CN201711340469.XA CN201711340469A CN107843855A CN 107843855 A CN107843855 A CN 107843855A CN 201711340469 A CN201711340469 A CN 201711340469A CN 107843855 A CN107843855 A CN 107843855A
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- battery
- frequency
- amplifier
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- alternating component
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
-
- 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]
- G01R31/3644—Constructional arrangements
-
- 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]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The present invention relates to battery technology field, discloses a kind of accumulator internal resistance detecting system, with it is accurate, easily measure accumulator internal resistance.Present system includes：Battery-operated loop, including the metal-oxide-semiconductor at battery both ends is connected on, digital analog converter is connected between the G levels and CPU of metal-oxide-semiconductor to produce a low-frequency ac signal to battery-operated loop；And detect branch with the current alternating component of filtering process for amplifying, voltage alternating component detects branch and voltage DC component detection branch, the CPU is additionally operable to the frequency of setting excitation end low-frequency ac signal, and current alternating component corresponding to output end under comprehensive n frequency, voltage alternating component and voltage DC component are to establish the internal resistance of equation group simultaneous solution battery according to circuit loop relation, wherein, under any frequency, it is to be extracted according to Fourier transformation and Wavelet Transformation Algorithm with encouraging the consistent active constituent of end frequency to participate in the current alternating component that calculates and voltage alternating component.
Description
Technical field
The present invention relates to battery technology field, more particularly to a kind of accumulator internal resistance detecting system.
Background technology
Each battery has internal resistance.The different types of internal resistance of cell is different.The battery of same type, because internal chemical is special
That levies is inconsistent, and internal resistance is also different.The internal resistance very little of battery, generally micro-ohm or milliohm level.Internal resistance is that measurement is cell performance
One important technology index of energy.Under normal circumstances, the small battery discharge ability of internal resistance is strong, the big battery discharge ability of internal resistance
It is weak.
It is important parameter that is accurate and quickly judging battery health that the internal resistance of battery, which has been recognized,.
The content of the invention
Present invention aims at disclosing a kind of accumulator internal resistance detecting system, with it is accurate, easily measure accumulator internal resistance.
To achieve the above object, the invention discloses a kind of accumulator internal resistance detecting system, including：
Battery-operated loop, including it is connected on the current-limiting resistance, current divider and metal-oxide-semiconductor at battery both ends, the metal-oxide-semiconductor
D poles connection battery positive level, S poles connection battery negative pole, be connected between the G levels and CPU of the metal-oxide-semiconductor digital-to-analogue turn
Parallel operation with to the battery-operated loop produce a low-frequency ac signal；
Current alternating component detects branch, including the first amplifier, the in-phase input end of first amplifier and anti-phase
Input respectively connects the both ends of the current divider, the output end connection first of first amplifier respectively through a coupled capacitor
Bandpass filter, first bandpass filter connect the CPU through the first digital analog converter；
Voltage alternating component detects branch, including the second amplifier, the in-phase input end of second amplifier and anti-phase
Input respectively connects the both positive and negative polarity of the battery, second amplifier respectively through a coupled capacitor and a current-limiting resistance
Output end connect the second bandpass filter, second bandpass filter connects the CPU through the second digital analog converter；
Voltage DC component detection branch, including the 3rd amplifier, the in-phase input end of the 3rd amplifier and anti-phase
Input respectively connects the both positive and negative polarity of the battery to obtain by the second amplifier front-end coupling respectively through a current-limiting resistance
Close the synchronous DC voltage component that electric capacity is obstructed, the output end connection low pass filter of the 3rd amplifier, the low pass
Wave filter connects the CPU through the 3rd digital analog converter；
The CPU, the frequency of setting excitation end low-frequency ac signal is additionally operable to, and output end is corresponding under comprehensive n frequency
Current alternating component, voltage alternating component and voltage DC component to establish equation group simultaneous solution according to circuit loop relation
The internal resistance of battery, and while the complex impedance under obtaining battery specific frequency, obtain battery Ohmic resistance；Wherein,
Under any frequency, current alternating component and the voltage alternating component for participating in calculating is according to Fourier transformations and Wavelet Transformation Algorithm
The active constituent consistent with excitation end frequency extracted.
The invention has the advantages that：
The advantages of direct-current discharge method is with injection method is exchanged is combined, simple in construction, easy to operate, the degree of accuracy is high.
Below with reference to accompanying drawings, the present invention is further detailed explanation.
Brief description of the drawings
The accompanying drawing for forming the part of the application is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is accumulator internal resistance detecting system circuit diagram disclosed in the embodiment of the present invention.
Embodiment
Embodiments of the invention are described in detail below in conjunction with accompanying drawing, but the present invention can be defined by the claims
Implement with the multitude of different ways of covering.
Embodiment 1
The present embodiment discloses a kind of accumulator internal resistance detecting system, as described in Figure 1, including：
Battery-operated loop, including it is connected on the current-limiting resistance, current divider and metal-oxide-semiconductor at battery both ends, the D of metal-oxide-semiconductor
Pole connection battery positive level, S poles connection battery negative pole, be connected between the G levels and CPU of metal-oxide-semiconductor digital analog converter with
A low-frequency ac signal is produced to battery-operated loop；
Current alternating component detects branch, including the first amplifier (A i.e. in figurei), the homophase input of the first amplifier
End and inverting input respectively connect the both ends of current divider, the output end connection first of the first amplifier respectively through a coupled capacitor
Bandpass filter (the programmable bandpass filter i.e. in figure1), the first bandpass filter is through the first digital analog converter (i.e. in figure
A/D1) connection CPU；
Voltage alternating component detects branch, including the second amplifier (A i.e. in figureV1), the homophase input of the second amplifier
End and inverting input respectively connect the both positive and negative polarity of battery, the second amplifier respectively through a coupled capacitor and a current-limiting resistance
Output end connection the second bandpass filter (programmable bandpass filter i.e. in figure2), the second bandpass filter is through the second number
Weighted-voltage D/A converter (the A/D i.e. in figure2) connection CPU；
Voltage DC component detection branch, including the 3rd amplifier (A i.e. in figureV2), the homophase input of the 3rd amplifier
End and inverting input respectively connect the both positive and negative polarity of battery to obtain by the second amplifier front-end coupling respectively through a current-limiting resistance
Close the synchronous DC voltage component that electric capacity is obstructed, the output end connection low pass filter of the 3rd amplifier, low pass filter warp
3rd digital analog converter (the A/D i.e. in figure3) connection CPU；
CPU, it is additionally operable to the frequency of setting excitation end low-frequency ac signal, and electricity corresponding to output end under comprehensive n frequency
AC compounent, voltage alternating component and voltage DC component are flowed to establish equation group simultaneous solution electric power storage according to circuit loop relation
The internal resistance in pond, and while the complex impedance under obtaining battery specific frequency, obtain battery Ohmic resistance；Wherein, it is any
Under frequency, participate in calculate current alternating component and voltage alternating component to be carried according to Fourier transformation and Wavelet Transformation Algorithm
The active constituent consistent with excitation end frequency taken.
Circuit based on Fig. 1, induced voltage signal is amplified on low-frequency ac exciting current signal and battery, filtering
Afterwards, it is sent into synchronous high-speed A/D converter and is changed into data signal.Larger work when being worked online due to batteries also be present
Electric current, and the harmonic components of various frequencies be present in operating current, the humorous of various frequencies should be gone out by accordingly also feeling containing on battery
The voltage signal of wave component.The amplitude of these interference signals is larger, and commonly greater than measurement signal, measuring circuit is needed using multistage
Bandpass filter is handled measurement signal.Because preferable bandpass filter is not present, therefore, the electricity of actual samples
The data signal of stream and voltage is also mingled with the non-active ingredients of substantial amounts of various frequencies, therefore, this implementation in addition to active ingredient
Under any frequency, the output end consistent with excitation end frequency is further extracted according to Fourier transformation and Wavelet Transformation Algorithm for example
The active constituent of signal.
To sum up, accumulator internal resistance detecting system disclosed in the present embodiment, combines direct-current discharge method and exchanges injection method
Advantage, simple in construction, easy to operate, the degree of accuracy is high.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (1)
- A kind of 1. accumulator internal resistance detecting system, it is characterised in that including：Battery-operated loop, including it is connected on the current-limiting resistance, current divider and metal-oxide-semiconductor at battery both ends, the D of the metal-oxide-semiconductor The positive level of pole connection battery, the negative pole of S poles connection battery, digital-to-analogue conversion is connected between the G levels and CPU of the metal-oxide-semiconductor Device with to the battery-operated loop produce a low-frequency ac signal；Current alternating component detects branch, including the first amplifier, the in-phase input end and anti-phase input of first amplifier Each both ends for connecting the current divider respectively through a coupled capacitor are held, the output end of first amplifier connects the first band logical Wave filter, first bandpass filter connect the CPU through the first digital analog converter；Voltage alternating component detects branch, including the second amplifier, the in-phase input end and anti-phase input of second amplifier Hold each both positive and negative polarity for connecting the battery respectively through a coupled capacitor and a current-limiting resistance, second amplifier it is defeated Go out the second bandpass filter of end connection, second bandpass filter connects the CPU through the second digital analog converter；Voltage DC component detection branch, including the 3rd amplifier, the in-phase input end and anti-phase input of the 3rd amplifier Each both positive and negative polarity for connecting the battery respectively through a current-limiting resistance is held to couple electricity by second amplifier front-end to obtain Hold the synchronous DC voltage component obstructed, the output end connection low pass filter of the 3rd amplifier, the LPF Device connects the CPU through the 3rd digital analog converter；The CPU, it is additionally operable to the frequency of setting excitation end low-frequency ac signal, and electricity corresponding to output end under comprehensive n frequency AC compounent, voltage alternating component and voltage DC component are flowed to establish equation group simultaneous solution electric power storage according to circuit loop relation The internal resistance in pond, and while the complex impedance under obtaining battery specific frequency, obtain battery Ohmic resistance；Wherein, it is any Under frequency, participate in calculate current alternating component and voltage alternating component to be carried according to Fourier transformation and Wavelet Transformation Algorithm The active constituent consistent with excitation end frequency taken.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711340469.XA CN107843855A (en) | 2017-12-14 | 2017-12-14 | Accumulator internal resistance detecting system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711340469.XA CN107843855A (en) | 2017-12-14 | 2017-12-14 | Accumulator internal resistance detecting system |
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| CN107843855A true CN107843855A (en) | 2018-03-27 |
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| CN201711340469.XA Pending CN107843855A (en) | 2017-12-14 | 2017-12-14 | Accumulator internal resistance detecting system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270353A (en) * | 2018-11-06 | 2019-01-25 | 北京巨成科技有限公司 | For energy-storage system internal resistance, connect resistance and ripple measurement method and device |
| CN110869785A (en) * | 2018-10-31 | 2020-03-06 | 深圳市大疆创新科技有限公司 | Online identification method and device for battery parameters |
| CN117148191A (en) * | 2023-11-01 | 2023-12-01 | 杭州华塑科技股份有限公司 | Method and system for testing internal resistance of battery |
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| US5862515A (en) * | 1996-02-16 | 1999-01-19 | Hioki Denki Kabushiki Kaisha | Battery tester |
| CN1763551A (en) * | 2005-10-28 | 2006-04-26 | 珠海泰坦科技股份有限公司 | Method for measuring internal resistance of storage battery |
| CN1967270A (en) * | 2005-11-18 | 2007-05-23 | 北华大学 | Method and system for testing battery impedance spectroscopy |
| CN101221223A (en) * | 2007-12-27 | 2008-07-16 | 武汉理工大学 | Single slice battery essential resistance and voltage on-line testing system for fuel cell pile |
| CN101706558A (en) * | 2009-07-20 | 2010-05-12 | 深圳市普禄科智能检测设备有限公司 | On-line monitoring system for direct-current power supply and storage battery |
| CN201548665U (en) * | 2009-09-30 | 2010-08-11 | 深圳市普禄科智能检测设备有限公司 | Storage battery detecting device based on multi-frequency AC discharge method |
| CN104569606A (en) * | 2014-12-29 | 2015-04-29 | 东华大学 | Lead-acid storage battery internal resistance detection system |
| CN106291369A (en) * | 2016-07-15 | 2017-01-04 | 珠海横琴派诺技术有限公司 | Accumulator internal resistance measurement method based on wavelet transformation, Apparatus and system |
-
2017
- 2017-12-14 CN CN201711340469.XA patent/CN107843855A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5862515A (en) * | 1996-02-16 | 1999-01-19 | Hioki Denki Kabushiki Kaisha | Battery tester |
| CN1763551A (en) * | 2005-10-28 | 2006-04-26 | 珠海泰坦科技股份有限公司 | Method for measuring internal resistance of storage battery |
| CN1967270A (en) * | 2005-11-18 | 2007-05-23 | 北华大学 | Method and system for testing battery impedance spectroscopy |
| CN101221223A (en) * | 2007-12-27 | 2008-07-16 | 武汉理工大学 | Single slice battery essential resistance and voltage on-line testing system for fuel cell pile |
| CN101706558A (en) * | 2009-07-20 | 2010-05-12 | 深圳市普禄科智能检测设备有限公司 | On-line monitoring system for direct-current power supply and storage battery |
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| CN106291369A (en) * | 2016-07-15 | 2017-01-04 | 珠海横琴派诺技术有限公司 | Accumulator internal resistance measurement method based on wavelet transformation, Apparatus and system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110869785A (en) * | 2018-10-31 | 2020-03-06 | 深圳市大疆创新科技有限公司 | Online identification method and device for battery parameters |
| WO2020087338A1 (en) * | 2018-10-31 | 2020-05-07 | 深圳市大疆创新科技有限公司 | Method and device for online recognition of battery parameter |
| CN109270353A (en) * | 2018-11-06 | 2019-01-25 | 北京巨成科技有限公司 | For energy-storage system internal resistance, connect resistance and ripple measurement method and device |
| CN117148191A (en) * | 2023-11-01 | 2023-12-01 | 杭州华塑科技股份有限公司 | Method and system for testing internal resistance of battery |
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Application publication date: 20180327 |