CN105866694A - Power lithium battery series voltage detector - Google Patents
Power lithium battery series voltage detector Download PDFInfo
- Publication number
- CN105866694A CN105866694A CN201610225584.1A CN201610225584A CN105866694A CN 105866694 A CN105866694 A CN 105866694A CN 201610225584 A CN201610225584 A CN 201610225584A CN 105866694 A CN105866694 A CN 105866694A
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- CN
- China
- Prior art keywords
- module
- lithium battery
- voltage detector
- analog switch
- dynamic lithium
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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]
- G01R31/378—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] specially adapted for the type of battery or accumulator
-
- 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]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
Abstract
The invention relates to a power lithium battery series voltage detector which comprises a main measurement unit, an A/D converter, a single-chip microcomputer and a display screen. The main measurement unit comprises an analog switch module, a differential operation module, a resistance voltage divider module and an absolute value processing module. The output end of the analog switch module is connected with the input end of the differential operation module. The output end of the differential operation module and the output end of the resistance voltage divider module are respectively connected with the first input end and the second input end of the absolute value processing module. The output end of the absolute value processing module is connected with the input end of the A/D converter. The output end of the A/D converter is connected with the input end of the single-chip microcomputer. The output end of the single-chip microcomputer is connected with the display screen. The power lithium battery series voltage detector realizes measurement for the total voltage of 17 battery strings and the voltage of each battery string by means of two high-voltage analog switches and furthermore can visually display the measured data. Furthermore the power lithium battery series voltage detector has advantages of low voltage loss rate, high precision, simple structure, small size, high convenience and high practicability.
Description
Technical field
The present invention relates to the string voltage detecting field of electrokinetic cell, specifically a kind of dynamic lithium battery string voltage inspection
Survey instrument.
Background technology
Along with the mankind's continuous enhancing to environmental protection consciousness, electric motor car industry is developed rapidly, therefore,
The exploitation of power battery of electric motor car module is imperative.It is known that the development of electric motor car is a kind of high-new
Technology, and the electrokinetic cell that electric motor car uses is to require the highest one in the battery of various applications.
In vehicle technology field, in order to meet the requirement of voltage and current, dynamic lithium battery is often by multiple
Lithium battery is composed in series, and finds in actual applications, when a certain series lithium battery in dynamic lithium battery occurs event
During barrier, the output of whole dynamic lithium battery is difficult to reach to use requirement, therefore, it is necessary to a kind of battery of exploitation
Detector, it is possible to measure global voltage and the voltage of every a string battery of whole dynamic lithium battery in real time.
At present, known battery tester includes the polytypes such as cell detection and batteries in parallel connection detection,
Wherein, single battery can only be detected by cell detection respectively, and batteries in parallel connection detection can be simultaneously to whole
Battery pack detects, but can only be for the battery detecting of parallel connection type；Existing series-connected cell inspection on market
Surveying instrument at most can only detect 15 string batteries simultaneously, and it is low to there is precision, volume is big, and structure is complicated
Defect.
Therefore, the defect existed in view of above-mentioned existing battery tester, the present inventor is based on being engaged in this series products
Manufacture and design rich experience and Professional knowledge for many years, the most in addition research and innovation, founded a kind of new dynamic
Power lithium battery string Voltage detector, can be simultaneously to 17 strings and the total voltage of above series-connected cell and battery of respectively going here and there
Dividing potential drop detects, and volume is little, simple in construction, it is possible to meet high voltage and high-precision measurement requirement.
Summary of the invention
It is an object of the invention to provide a kind of dynamic lithium battery string Voltage detector, with 2 high voltage analog switches
Achieve total voltage and the measurement of each string battery voltage divider of 17 string batteries, and can intuitively show measurement data and survey
The maximum of amount and minima, very clear can see pressure reduction, and loss of voltage rate is low, precision is high, structure
Simply, volume is little, convenient and practical.
The object of the invention to solve the technical problems realizes by the following technical solutions.
According to the present invention propose a kind of dynamic lithium battery string Voltage detector, wherein, including main measuring unit,
A/D converter, single-chip microcomputer and display screen；
Described main measuring unit includes analog switch module, calculus of differences module, electric resistance partial pressure module and definitely
Value processing module；
The outfan of described analog switch module is connected with the input of calculus of differences module, calculus of differences module
Outfan and electric resistance partial pressure module outfan respectively with first and second input of absolute value processing module even
Connecing, the described outfan of absolute value processing module is connected with the input of A/D converter；
The outfan of described A/D converter is connected with the input of single-chip microcomputer, the outfan of single-chip microcomputer and display
Screen connects.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid a kind of dynamic lithium battery string Voltage detector, wherein, described detector also includes CAN communication
Module, described CAN communication module is connected with the outfan of single-chip microcomputer.
Aforesaid a kind of dynamic lithium battery string Voltage detector, wherein, described analog switch module includes simulation
Switch U1 and analog switch U2.
Aforesaid a kind of dynamic lithium battery string Voltage detector, wherein, described analog switch module and resistance divide
The input of die block is connected with battery module.
Aforesaid a kind of dynamic lithium battery string Voltage detector, wherein, described battery module at least includes 17 strings
Battery.
Aforesaid a kind of dynamic lithium battery string Voltage detector, described battery module includes 17 string batteries, wherein,
15 string batteries therein are gated by analog switch U1 and analog switch U2, and electric resistance partial pressure module is to wherein
2 string batteries gate.
Aforesaid a kind of dynamic lithium battery string Voltage detector, described battery module includes 17 string batteries, wherein,
3rd, 5,7,9,11,13,15,17 road string batteries are gated by analog switch U1；Analog switch
4th, 6,8,10,12,14,16 road string batteries are gated by U2.
Aforesaid a kind of dynamic lithium battery string Voltage detector, wherein, described A/D converter uses MAX1166,
Described analog switch U1 and analog switch U2 all uses MAX14752.
Aforesaid a kind of dynamic lithium battery string Voltage detector, wherein, described single-chip microcomputer uses PIC18F45K80.
Aforesaid a kind of dynamic lithium battery string Voltage detector, wherein, described display screen uses 7 cun of liquid crystal
Display screen.
The present invention compared with prior art has clear advantage and beneficial effect, by technique scheme,
The present invention a kind of dynamic lithium battery string Voltage detector can reach suitable technological progress and practicality, and has
Having the extensive value in industry, it at least has the advantage that
(1), the present invention uses 2 high voltage analog switches to achieve 17 series lithium batteries are measured overall electricity simultaneously
Pressure and each string battery component voltage, without voltage division processing, loss of voltage rate is low, and certainty of measurement is high.
(2), the present invention use 7 cun of LCDs, with numeral and block diagram two ways show measurement data,
Can intuitively show size cases and maximum voltage value, minimum amount of voltage that and the pressure reduction of each string voltage, it is possible to a mesh
It is clear and presents the string battery that abnormal conditions occur.
(3), conventional way is: with analog switch U1 to the 1st, 3,5,7,9,11,13,15 tunnels
String battery gates, and carries out the 2nd, 4,6,8,10,12,14 road string batteries with analog switch U2
Gating, and the 16th, 17 string battery is then carried out HIGH PRESSURE TREATMENT, do so causes cost to be significantly increased.This
Bright technology is then possible not only to measure each string voltage simultaneously, and low cost, simple in construction, volume is little, surveys
Amount is convenient, greatly improves measurement efficiency, thus is suitable for large-scale production, meets cost benefit, have
Value in industry, is suitable to industrial circle and is widely popularized use.
In sum, one dynamic lithium battery string Voltage detector of the present invention has the most progressive technically,
And there is obvious good effect, it is really a new and innovative, progressive, practical new design.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technology of the present invention
Means, and can being practiced according to the content of description, and in order to allow the present invention above and other purpose,
Feature and advantage can become apparent, and below especially exemplified by preferred embodiment, and coordinates accompanying drawing, describes in detail such as
Under.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the program flow diagram that the present invention measures.
[main element symbol description]
1: main measuring unit 2: analog switch module
3: battery module
Detailed description of the invention
By further illustrating the technological means and effect that the present invention taked by reaching predetermined goal of the invention, with
Lower combination accompanying drawing and preferred embodiment, to a kind of dynamic lithium battery string Voltage detector proposed according to the present invention,
Its detailed description of the invention, structure, feature and effect thereof, after describing in detail such as.
A kind of dynamic lithium battery string Voltage detector, including main measuring unit, A/D converter, single-chip microcomputer and aobvious
Display screen；Described main measuring unit includes analog switch module, calculus of differences module, electric resistance partial pressure module and absolutely
To value processing module；The outfan of described analog switch module is connected with the input of calculus of differences module, poor
The outfan of point computing module and the outfan of electric resistance partial pressure module respectively with the first of absolute value processing module,
Two inputs connect, and the described outfan of absolute value processing module is connected with the input of A/D converter；Institute
The input of the outfan and single-chip microcomputer of stating A/D converter is connected, and the outfan of single-chip microcomputer is connected with display screen.
Described analog switch module includes two high voltage analog switches, respectively analog switch U1 and analog switch
U2.Battery module is connected with analog switch U1 and analog switch U2 and electric resistance partial pressure module, described battery mould
Block includes that 17 series lithium batteries are connected in series, and 15 series lithium batteries therein are gated by analog switch module, passes through
After calculus of differences and absolute value process, A/D converter is arrived in output；Other 2 series lithium batteries are by electric resistance partial pressure module
Gating, after absolute value processes, the signal after conversion is exported list to A/D converter, A/D converter by output
Sheet machine, is then passed through display screen display measurement result.
The detector of the present invention also includes CAN communication module, if the lithium battery that battery module comprises is more than 17 strings,
Then can add CAN communication module, be measured by CAN cascade.Described CAN communication module and list
The outfan of sheet machine connects.
Above-mentioned dynamic lithium battery string Voltage detector, described A/D converter selects MAX1166 (in high precision
16).In the present system, owing to the common-mode voltage at serial lithium battery Battery pack two ends is higher, beyond general
The working range of logical analog switch, therefore the analog switch U1 and analog switch U2 of the present invention all selects
MAX14752, wherein the parameter of MAX14752 is: 8 select 1 multiplexer, ceiling voltage 72V, maximum
Conducting resistance 120 ohm, under cut-off state, leakage current is less than 20nA, operating current 600uA.
PIC18F45K80 selected by described single-chip microcomputer, and the language of single-chip microcomputer uses C programming language.
The display screen of the present invention uses 7 cun of LCDs, can show measurement data in two ways,
It is respectively numerical monitor and block diagram shows.Measurement data can the most specifically be presented by numerical monitor,
And maximum voltage value, minimum amount of voltage that and the concrete numerical value of pressure reduction is shown in the lower right corner of display interface.Column
Figure can demonstrate the size cases of voltage intuitively, presents string battery abnormal conditions occur at a glance,
Thus make corresponding solution.
Table 1 below. be one of the measurement result of the present invention:
Table 1.
| Passage | Cell voltage | Measure voltage | Deviation |
| U1 | 3.95 | 3.963 | 0.013 |
| U2 | 4.0343 | 4.05 | 0.0157 |
| U3 | 3.979 | 3.992 | 0.013 |
| U4 | 4.0619 | 4.056 | 0.0141 |
| U5 | 4.0383 | 4.037 | 0.0187 |
| U6 | 4.0324 | 4.051 | 0.0186 |
| U7 | 4.0346 | 4.046 | 0.0114 |
| U8 | 4.099 | 4.114 | 0.015 |
| U9 | 4.1186 | 4.119 | 0.0104 |
| U10 | 4.105 | 4.113 | 0.008 |
| U11 | 4.098 | 4.108 | 0.01 |
| U12 | 4.107 | 4.118 | 0.011 |
| U13 | 4.106 | 4.123 | 0.017 |
| U14 | 4.1037 | 4.104 | 0.0103 |
| U15 | 4.094 | 4.106 | 0.012 |
| U16 | 4.096 | 4.079 | -0.017 |
| U17 | 4.0997 | 4.096 | -0.0037 |
The measurement result of upper table shows, the dynamic lithium battery string Voltage detector certainty of measurement of the present invention is high, full
Foot high voltage, high-precision measurement requirement, it is possible to detection string voltage more truely and accurately, have preferably
Detection results, and it is high to measure efficiency, thus more there is practicality, be suitable to be widely popularized use.
The above, be only presently preferred embodiments of the present invention, not makees the present invention any pro forma
Limit, although the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any
Those skilled in the art, in the range of without departing from technical solution of the present invention, when available the disclosure above
Technology contents make a little change or be modified to the Equivalent embodiments of equivalent variations, as long as being without departing from this
The content of bright technical scheme, any simple modification above example made according to the technical spirit of the present invention,
Equivalent variations and modification, all still fall within the range of technical solution of the present invention.
Claims (10)
1. a dynamic lithium battery string Voltage detector, it is characterised in that it includes that main measuring unit, A/D turn
Parallel operation, single-chip microcomputer and display screen；
Described main measuring unit includes analog switch module, calculus of differences module, electric resistance partial pressure module and definitely
Value processing module；
The outfan of described analog switch module is connected with the input of calculus of differences module, calculus of differences module
It is connected with first and second input of absolute value processing module respectively with the outfan of electric resistance partial pressure module, described
The outfan of absolute value processing module is connected with the input of A/D converter；
The outfan of described A/D converter is connected with the input of single-chip microcomputer, the outfan of single-chip microcomputer and display
Screen connects.
2. dynamic lithium battery string Voltage detector as claimed in claim 1, it is characterised in that also include CAN
Communication module, described CAN communication module is connected with the outfan of single-chip microcomputer.
3. dynamic lithium battery string Voltage detector as claimed in claim 1, it is characterised in that described simulation is opened
Close module and include analog switch U1 and analog switch U2.
4. dynamic lithium battery string Voltage detector as claimed in claim 1, it is characterised in that described simulation is opened
The input closing module and electric resistance partial pressure module is connected with battery module.
5. dynamic lithium battery string Voltage detector as claimed in claim 4, it is characterised in that described battery mould
Block at least includes 17 string batteries.
6. dynamic lithium battery string Voltage detector as claimed in claim 4, it is characterised in that described battery mould
Block includes 17 string batteries, and wherein, 15 string batteries therein are carried out by analog switch U1 and analog switch U2
Gating, 2 string batteries therein are gated by electric resistance partial pressure module.
7. dynamic lithium battery string Voltage detector as claimed in claim 4, it is characterised in that described battery mould
Block includes 17 string batteries, and wherein, the 3rd, 5,7,9,11,13,15,17 tunnels are gone here and there by analog switch U1
Battery gates；4th, 6,8,10,12,14,16 road string batteries are gated by analog switch U2.
8. dynamic lithium battery string Voltage detector as claimed in claim 1, it is characterised in that described A/D turns
Parallel operation uses MAX1166, described analog switch U1 and analog switch U2 all to use MAX14752.
9. dynamic lithium battery string Voltage detector as claimed in claim 1, it is characterised in that described single-chip microcomputer
Use PIC18F45K80.
10. dynamic lithium battery string Voltage detector as claimed in claim 1, it is characterised in that described display
Screen uses 7 cun of LCDs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610225584.1A CN105866694A (en) | 2016-04-12 | 2016-04-12 | Power lithium battery series voltage detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610225584.1A CN105866694A (en) | 2016-04-12 | 2016-04-12 | Power lithium battery series voltage detector |
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| CN105866694A true CN105866694A (en) | 2016-08-17 |
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| CN201610225584.1A Pending CN105866694A (en) | 2016-04-12 | 2016-04-12 | Power lithium battery series voltage detector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108663622A (en) * | 2017-03-30 | 2018-10-16 | 深圳市理邦精密仪器股份有限公司 | Battery voltage measuring circuit and voltage measurement system |
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| CN205484737U (en) * | 2016-04-12 | 2016-08-17 | 洛阳鑫光锂电科技有限公司 | Power lithium cell cluster voltage detecting appearance |
-
2016
- 2016-04-12 CN CN201610225584.1A patent/CN105866694A/en active Pending
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| CN2226310Y (en) * | 1994-12-26 | 1996-05-01 | 大连市旅顺电力电子设备有限公司 | Voltage signal acquisition apparatus for testing electric parameter of accumulator |
| CN101915897A (en) * | 2010-07-20 | 2010-12-15 | 安徽鑫龙电器股份有限公司 | Battery routing inspection apparatus and battery voltage acquisition method |
| US8571738B1 (en) * | 2012-06-13 | 2013-10-29 | Jtt Electronics Ltd | Automotive vehicle battery power system monitoring systems, apparatus and methods |
| CN204925232U (en) * | 2015-04-20 | 2015-12-30 | 中国计量学院 | Accurate detection circuitry of lithium cell group monomer voltage |
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Application publication date: 20160817 |