CN107703450A - A kind of battery resistance detecting circuit - Google Patents
A kind of battery resistance detecting circuit Download PDFInfo
- Publication number
- CN107703450A CN107703450A CN201610643434.2A CN201610643434A CN107703450A CN 107703450 A CN107703450 A CN 107703450A CN 201610643434 A CN201610643434 A CN 201610643434A CN 107703450 A CN107703450 A CN 107703450A
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- CN
- China
- Prior art keywords
- battery
- circuit
- voltage
- current signal
- instrument amplifier
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Tests Of Electric Status Of Batteries (AREA)
Abstract
The invention discloses a kind of battery resistance detecting circuit, by injecting ac current signal to battery, measures in ac voltage signal and input current caused by battery both ends, the internal resistance of battery is calculated.The internal resistance of cell is measured using alternating current method, it is not necessary to battery is discharged, so as to realize on-line checking.In actually measuring, because the internal resistance of battery is in micro-ohm or milliohm level, after injecting certain electric current, it is very faint in voltage signal caused by battery both ends, often flooded by noise, the system gets the accurate ac voltage at battery both ends through high-performance instrument amplifier and integrator again by the amplified measurement portion formed, and the internal resistance of battery is then calculated according to the ac voltage and charging current value.
Description
Technical field
The present invention relates to a kind of battery resistance detecting circuit.
Background technology
As global climate constantly warms, the increasingly reinforcement of energy conservation and environmental awareness, electric automobile replacing fuel automobile turns into
Inexorable trend.Electric automobile is using battery as energy source, and battery is exactly using one of important parameter of consumption state
Its internal resistance.Either battery will fail, off-capacity or discharge and recharge it is improper, can be embodied from its internal resistance change
Out.Therefore can be by measuring accumulator internal resistance, to assess its working condition.
The content of the invention
Goal of the invention：For above-mentioned prior art, a kind of battery resistance detecting circuit is proposed, being capable of on-line checking electric power storage
The resistance in pond.
Technical scheme：A kind of battery resistance detecting circuit, including path selection switch, preposition amplification bandpass filtering electricity
Road, high-performance instrument amplifier, integrator, DC amplification circuit, single-chip microcomputer, exchange constant current signal generator, square wave conversion electricity
Road, voltage x current sample circuit；Wherein, the exchange constant current signal generator is used to export ac current signal to battery；
The electric current that the voltage x current sample circuit is used to gather in the exchange constant current signal generator output ac current signal has
Valid value, and detect alternating voltage virtual value caused by battery both ends；The output end of the voltage x current sample circuit is through described logical
Road selecting switch is connected to the preposition amplification bandwidth-limited circuit, the output end connection of the preposition amplification bandwidth-limited circuit
The input of the high-performance instrument amplifier；The square wave conversion circuit is used for the exchange constant current signal generator output
Sinusoidal signal be converted to square-wave signal after input the high-performance instrument amplifier；The output of the high-performance instrument amplifier
End connects the input of the integrator, and the output end of the integrator connects the single-chip microcomputer through the DC amplification circuit.
As the priority scheme of the present invention, the preposition amplification bandwidth-limited circuit includes one-stage low-pass filter and one-level
High-pass filter, the low pass filter use the LPF of multiple feedback type.
Beneficial effect：A kind of battery resistance detecting circuit of the present invention, by injecting ac current signal to battery,
Measure in ac voltage signal and input current caused by battery both ends, the internal resistance of battery is calculated.Surveyed using alternating current method
Measure the internal resistance of cell, it is not necessary to battery is discharged, so as to realize on-line checking.In actually measuring, due to battery
Internal resistance is very faint in voltage signal caused by battery both ends after injecting certain electric current in micro-ohm or milliohm level, is often made an uproar
Sound floods, and the system gets battery two by the amplified measurement portion formed again through high-performance instrument amplifier and integrator
The accurate ac voltage at end, is then calculated the internal resistance of battery according to the ac voltage and charging current value.
Brief description of the drawings
Fig. 1 is a kind of structural representation of battery resistance detecting circuit.
Embodiment
Further explanation is done to the present invention below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of battery resistance detecting circuit, including path selection switch, preposition amplification bandpass filtering electricity
Road, high-performance instrument amplifier, integrator, DC amplification circuit, single-chip microcomputer, exchange constant current signal generator, square wave conversion electricity
Road, voltage x current sample circuit.Wherein, leading to preposition amplification band filter circuit includes one-stage low-pass filter and one-level high-pass filtering
Device, the low pass filter use the LPF of multiple feedback type.
Exchange constant current signal generator is used to export ac current signal to battery.Voltage x current sample circuit is used to adopt
Current effective value in collection exchange constant current signal generator output ac current signal, and detect alternating current caused by battery both ends
It is pressed with valid value.The output end of voltage x current sample circuit is connected to preposition amplification bandwidth-limited circuit through path selection switch, preceding
Put the input of the output end connection high-performance instrument amplifier of big bandwidth-limited circuit.Square wave conversion circuit is used for will exchange
The sinusoidal signal of constant current signal generator output inputs high-performance instrument amplifier after being converted to square-wave signal.High-performance instrument is put
The input of the output end connection integrator of big device, the output end of integrator connect single-chip microcomputer through DC amplification circuit.
The exchange constant current signal of exchange constant current signal generator output is connected to battery both ends, now will store after signal loading
AC signal caused by battery both ends samples through voltage x current sample circuit.Before the small-signal that battery both ends detect is passed through
High-performance instrument amplifier input is input to after putting big filtering, the sine wave signal of injecting accumulator passes through circuit transformations shape
Into after square-wave signal, multiplier reference signal end is input to.Obtained according to Cleaning Principle, it is integrator system that integrator output, which is,
Number, it is the signal frequency at battery both ends, detection signal and reference signal phase difference.Noise is inhibited by integrator, is input to
The signal of battery and the timing of circuit coefficient correlation one, integrator output signal relation proportional to accumulator internal resistance, are surveyed
The internal resistance of battery can be calculated by going out the ac voltage at battery both ends and charging current value.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (2)
- A kind of 1. battery resistance detecting circuit, it is characterised in that：Including path selection switch, preposition amplification bandpass filtering electricity Road, high-performance instrument amplifier, integrator, DC amplification circuit, single-chip microcomputer, exchange constant current signal generator, square wave conversion electricity Road, voltage x current sample circuit；Wherein, the exchange constant current signal generator is used to export ac current signal to battery； The electric current that the voltage x current sample circuit is used to gather in the exchange constant current signal generator output ac current signal has Valid value, and detect alternating voltage virtual value caused by battery both ends；The output end of the voltage x current sample circuit is through described logical Road selecting switch is connected to the preposition amplification bandwidth-limited circuit, the output end connection of the preposition amplification bandwidth-limited circuit The input of the high-performance instrument amplifier；The square wave conversion circuit is used for the exchange constant current signal generator output Sinusoidal signal be converted to square-wave signal after input the high-performance instrument amplifier；The output of the high-performance instrument amplifier End connects the input of the integrator, and the output end of the integrator connects the single-chip microcomputer through the DC amplification circuit.
- 2. according to a kind of battery resistance detecting circuit described in claim 1, it is characterised in that：The preposition amplification bandpass filtering Circuit includes one-stage low-pass filter and one-level high-pass filter, and the low pass filter uses the LPF of multiple feedback type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610643434.2A CN107703450A (en) | 2016-08-09 | 2016-08-09 | A kind of battery resistance detecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610643434.2A CN107703450A (en) | 2016-08-09 | 2016-08-09 | A kind of battery resistance detecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107703450A true CN107703450A (en) | 2018-02-16 |
Family
ID=61168664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610643434.2A Pending CN107703450A (en) | 2016-08-09 | 2016-08-09 | A kind of battery resistance detecting circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN107703450A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557476A (en) * | 2018-12-05 | 2019-04-02 | 珠海朗尔电气有限公司 | Measuring device and measuring method |
| CN116027159A (en) * | 2023-01-30 | 2023-04-28 | 宁波群芯微电子股份有限公司 | Optocoupler voltage-resistant quality control method and optocoupler voltage-resistant test circuit |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5821756A (en) * | 1992-05-01 | 1998-10-13 | Midtronics, Inc. | Electronic battery tester with tailored compensation for low state-of charge |
| EP1336857A1 (en) * | 2002-02-13 | 2003-08-20 | Peugeot Citroen Automobiles SA | System for determining the state of charge of a battery, especially for a motor vehicle |
| CN1558253A (en) * | 1998-09-11 | 2004-12-29 | ��S��Ǯ | Apparatus and method for measuring complex impedance of cells and batteries |
| CN202524121U (en) * | 2012-03-30 | 2012-11-07 | 青岛艾迪森科技有限公司 | Intelligent battery management system |
| CN103278695A (en) * | 2013-06-05 | 2013-09-04 | 安徽安凯汽车股份有限公司 | Electric car power battery pack internal resistance monitoring system and monitoring method thereof |
| CN203299350U (en) * | 2013-05-08 | 2013-11-20 | 山西大学 | Battery internal resistance on-line measuring instrument |
| CN103545568A (en) * | 2013-10-28 | 2014-01-29 | 青岛艾迪森科技有限公司 | Maintenance-free battery |
-
2016
- 2016-08-09 CN CN201610643434.2A patent/CN107703450A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5821756A (en) * | 1992-05-01 | 1998-10-13 | Midtronics, Inc. | Electronic battery tester with tailored compensation for low state-of charge |
| CN1558253A (en) * | 1998-09-11 | 2004-12-29 | ��S��Ǯ | Apparatus and method for measuring complex impedance of cells and batteries |
| EP1336857A1 (en) * | 2002-02-13 | 2003-08-20 | Peugeot Citroen Automobiles SA | System for determining the state of charge of a battery, especially for a motor vehicle |
| CN202524121U (en) * | 2012-03-30 | 2012-11-07 | 青岛艾迪森科技有限公司 | Intelligent battery management system |
| CN203299350U (en) * | 2013-05-08 | 2013-11-20 | 山西大学 | Battery internal resistance on-line measuring instrument |
| CN103278695A (en) * | 2013-06-05 | 2013-09-04 | 安徽安凯汽车股份有限公司 | Electric car power battery pack internal resistance monitoring system and monitoring method thereof |
| CN103545568A (en) * | 2013-10-28 | 2014-01-29 | 青岛艾迪森科技有限公司 | Maintenance-free battery |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557476A (en) * | 2018-12-05 | 2019-04-02 | 珠海朗尔电气有限公司 | Measuring device and measuring method |
| CN116027159A (en) * | 2023-01-30 | 2023-04-28 | 宁波群芯微电子股份有限公司 | Optocoupler voltage-resistant quality control method and optocoupler voltage-resistant test circuit |
| CN116027159B (en) * | 2023-01-30 | 2023-08-25 | 宁波群芯微电子股份有限公司 | Optocoupler voltage-resistant quality control method and optocoupler voltage-resistant test circuit |
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20180216 |