CN104502717A - Intelligent battery inner resistance measuring meter - Google Patents
Intelligent battery inner resistance measuring meter Download PDFInfo
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- CN104502717A CN104502717A CN201510011004.4A CN201510011004A CN104502717A CN 104502717 A CN104502717 A CN 104502717A CN 201510011004 A CN201510011004 A CN 201510011004A CN 104502717 A CN104502717 A CN 104502717A
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- chip microcomputer
- intelligent battery
- internal resistance
- receivers
- analog switch
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Abstract
An intelligent battery inner resistance measuring meter is composed of a measuring meter pen P, a measuring meter pen Q, a voltage measuring module capable of converting range automatically, an analog switch, an expansion resistor r1, a load resistor R, a single chip microcomputer, a liquid crystal display module and eight bidirectional bust transmitter-receivers. The meter can quickly and accurately measure the inner resistance of the battery and is simple in structure and good in stability and has high practicability.
Description
Technical field
The invention belongs to instrument field, particularly a kind of intelligent battery internal resistance measurement table.
Background technology
The internal resistance of battery can reflect the capacity condition of battery indirectly, and capacity is larger, and internal resistance is less, the visible performance that can judge battery by detecting the internal resistance of cell.The method measuring the internal resistance of cell is a lot, and easy method, for loading voltage drop method and short-circuit current method, is accurately measured and can using compensation principle or strap circuits unbalanced electric bridge be completed.These methods need through measuring a series of tedious operations such as data processing from connecting circuit, instrumentation, complete the time that one-shot measurement generally needs dozens of minutes, and human factor is more in measuring, measuring error is comparatively large, and some method even causes harmful effect to the life-span of battery.
Summary of the invention
The defect that the present invention is directed to the existence of above-mentioned prior art provides a kind of intelligent battery internal resistance measurement table, and this table can measure the internal resistance of battery quickly and accurately.
The technical solution adopted for the present invention to solve the technical problems is: a kind of intelligent battery internal resistance measurement table, and it is by measuring test pencil P, measure test pencil Q, can the voltage measurement module of automatic conversioning broad, analog switch, spreading resistance r1, pull-up resistor R, single-chip microcomputer, LCD MODULE, eight bidirectional bus transmitter/receivers composition, it is characterized in that: single-chip microcomputer by control bus respectively with voltage measurement module, LCD MODULE is connected, single-chip microcomputer is connected with eight bidirectional bus transmitter/receivers by data bus, the P1.1 pin of single-chip microcomputer is connected with the control end M of eight bidirectional bus transmitter/receivers, the P1.0 pin of single-chip microcomputer is connected with the control end IN of analog switch, eight bidirectional bus transmitter/receivers by data bus respectively with voltage measurement module, LCD MODULE is connected, analog switch, spreading resistance r1, pull-up resistor R is connected with voltage measurement module after connecting, the one end measuring test pencil P is connected with voltage measurement module, the other end measuring test pencil P is connected with the positive pole of mesuring battary, the one end measuring test pencil Q is connected with voltage measurement module, and the other end measuring test pencil Q is connected with the negative pole of mesuring battary.
The STC15F2K60S2 type single-chip microcomputer that described single-chip microcomputer selects macrocrystalline Science and Technology Ltd. to produce.
One end of described analog switch is connected with voltage measurement module, the other end of analog switch is connected with one end of spreading resistance r1, the other end of spreading resistance r1 is connected with one end of pull-up resistor R, the other end of pull-up resistor R is connected with voltage measurement module.
The resistance of described spreading resistance r1 is 99 Ω.
The resistance of described pull-up resistor R is 100 Ω.
The ADG819 with low on-resistance characteristic selected by described analog switch.
Described eight bidirectional bus transmitter/receivers select integrated circuit 74LS245.
Data transfer direction between described single-chip microcomputer and eight bidirectional bus transmitter/receivers is transmitted in both directions.
The invention has the beneficial effects as follows: provide a kind of intelligent battery internal resistance measurement table, this list structure is simple, precision is high, good stability, has stronger practicality.
Accompanying drawing explanation
Fig. 1 is intelligent battery internal resistance measurement watch circuit structural drawing.
Fig. 2 is intelligent battery internal resistance measurement list procedure process flow diagram.
Embodiment
Generally, the conducting resistance of analog switch ADG819 is 0.5 Ω, if represent the conducting resistance sum of spreading resistance r1 and analog switch ADG819 with r2, then r2=r1+0.5.If make internal resistance of cell r measuring error minimum, according to Theory of Circuit Analysis, can derive the formula calculating the internal resistance of cell is: r=(E/U1-1) R-r2, and in this formula, E is the electromotive force of battery, r is the internal resistance of battery, and U1 is the voltage at pull-up resistor R two ends.After monolithic processor resetting, single-chip microcomputer exports high level from P1.0 pin, the IN of analog switch end is put 1, makes analog switch conducting, to detect voltage measurement module then continuously.When detecting that voltage measurement module has input voltage, the IN input end of analog switch sets to 0 by single-chip microcomputer, then D end and S hold in off-state, and now voltage measurement module measures the electromotive force E that the magnitude of voltage of gained is battery.Single-chip microcomputer is from P1.1 pin output low level, the M of eight bidirectional bus transmitter/receivers end is set to 0, the data transfer direction of eight bidirectional bus transmitter/receivers is B ends is data input pin, A end is data output end, the electromotive force E of battery is read into single-chip microcomputer from voltage measurement module by data bus by single-chip microcomputer, and stored in single-chip microcomputer storer, then the IN of analog switch end is put 1 by single-chip microcomputer again, then D end holds conducting with S, now voltage measurement module measures the magnitude of voltage of gained is analog switch, spreading resistance r1, the voltage U at two ends after pull-up resistor R connects.According to above-mentioned same method, single-chip microcomputer by data bus by voltage U stored in single-chip microcomputer storer.Utilize series circuit voltage division formulas, single-chip microcomputer calculates the voltage U 1:U1=100 U/199.5 at pull-up resistor R two ends, and recycling formula r=(E/U1-1) R-r2, single-chip microcomputer calculates the value of internal resistance of cell r.Single-chip microcomputer exports high level from P1.1 pin, the M of eight bidirectional bus transmitter/receivers end is put 1, the data transfer direction of eight bidirectional bus transmitter/receivers is A ends is data input pin, B end is data output end, the value of internal resistance of cell r is sent to LCD MODULE by data bus by single-chip microcomputer, makes LCD MODULE demonstrate the value of internal resistance of cell r.
Claims (8)
1. an intelligent battery internal resistance measurement table, it is by measuring test pencil P, measure test pencil Q, can the voltage measurement module of automatic conversioning broad, analog switch, spreading resistance r1, pull-up resistor R, single-chip microcomputer, LCD MODULE, eight bidirectional bus transmitter/receivers composition, it is characterized in that: single-chip microcomputer by control bus respectively with voltage measurement module, LCD MODULE is connected, single-chip microcomputer is connected with eight bidirectional bus transmitter/receivers by data bus, the P1.1 pin of single-chip microcomputer is connected with the control end M of eight bidirectional bus transmitter/receivers, the P1.0 pin of single-chip microcomputer is connected with the control end IN of analog switch, eight bidirectional bus transmitter/receivers by data bus respectively with voltage measurement module, LCD MODULE is connected, analog switch, spreading resistance r1, pull-up resistor R is connected with voltage measurement module after connecting, the one end measuring test pencil P is connected with voltage measurement module, the other end measuring test pencil P is connected with the positive pole of mesuring battary, the one end measuring test pencil Q is connected with voltage measurement module, and the other end measuring test pencil Q is connected with the negative pole of mesuring battary.
2. intelligent battery internal resistance measurement table according to claim 1, is characterized in that: the STC15F2K60S2 type single-chip microcomputer that single-chip microcomputer selects macrocrystalline Science and Technology Ltd. to produce.
3. intelligent battery internal resistance measurement table according to claim 1, is characterized in that: one end of analog switch is connected with voltage measurement module, the other end of analog switch is connected with one end of spreading resistance r1, the other end of spreading resistance r1 is connected with one end of pull-up resistor R, the other end of pull-up resistor R is connected with voltage measurement module.
4. intelligent battery internal resistance measurement table according to claim 1, is characterized in that: the resistance of spreading resistance r1 is 99 Ω.
5. intelligent battery internal resistance measurement table according to claim 1, is characterized in that: the resistance of pull-up resistor R is 100 Ω.
6. intelligent battery internal resistance measurement table according to claim 1, is characterized in that: the ADG819 with low on-resistance characteristic selected by analog switch.
7. intelligent battery internal resistance measurement table according to claim 1, is characterized in that: eight bidirectional bus transmitter/receivers select integrated circuit 74LS245.
8. intelligent battery internal resistance measurement table according to claim 1, is characterized in that: the data transfer direction between single-chip microcomputer and eight bidirectional bus transmitter/receivers is transmitted in both directions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510011004.4A CN104502717A (en) | 2015-01-10 | 2015-01-10 | Intelligent battery inner resistance measuring meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510011004.4A CN104502717A (en) | 2015-01-10 | 2015-01-10 | Intelligent battery inner resistance measuring meter |
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| Publication Number | Publication Date |
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| CN104502717A true CN104502717A (en) | 2015-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510011004.4A Pending CN104502717A (en) | 2015-01-10 | 2015-01-10 | Intelligent battery inner resistance measuring meter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106569135A (en) * | 2016-10-13 | 2017-04-19 | 捷开通讯(深圳)有限公司 | Battery detection circuit and detection method |
| CN106786864A (en) * | 2016-12-14 | 2017-05-31 | 深圳市伟义兄弟进出口有限公司 | A kind of charger that can test battery parameter |
Citations (5)
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|---|---|---|---|---|
| US6384608B1 (en) * | 2001-03-13 | 2002-05-07 | Actron Manufacturing Co. | Battery tester using internal resistance to measure a condition of a battery |
| CN2692690Y (en) * | 2003-12-29 | 2005-04-13 | 吴中明 | Detecting device for internal resistance of battery |
| CN201637833U (en) * | 2010-01-20 | 2010-11-17 | 上海佰讯通智能科技有限公司 | On-line measurement system for accumulators |
| CN101943743A (en) * | 2009-11-30 | 2011-01-12 | 杭州华塑加达网络科技有限公司 | Intelligent monitoring method and device of connecting strip resistance and battery internal resistance of battery pack |
| CN203745543U (en) * | 2014-01-10 | 2014-07-30 | 秦辉 | Active network internal resistance measuring device |
-
2015
- 2015-01-10 CN CN201510011004.4A patent/CN104502717A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6384608B1 (en) * | 2001-03-13 | 2002-05-07 | Actron Manufacturing Co. | Battery tester using internal resistance to measure a condition of a battery |
| CN2692690Y (en) * | 2003-12-29 | 2005-04-13 | 吴中明 | Detecting device for internal resistance of battery |
| CN101943743A (en) * | 2009-11-30 | 2011-01-12 | 杭州华塑加达网络科技有限公司 | Intelligent monitoring method and device of connecting strip resistance and battery internal resistance of battery pack |
| CN201637833U (en) * | 2010-01-20 | 2010-11-17 | 上海佰讯通智能科技有限公司 | On-line measurement system for accumulators |
| CN203745543U (en) * | 2014-01-10 | 2014-07-30 | 秦辉 | Active network internal resistance measuring device |
Non-Patent Citations (1)
| Title |
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| 秦辉 等: "基于单片机的电池内阻测量装置", 《计量技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106569135A (en) * | 2016-10-13 | 2017-04-19 | 捷开通讯(深圳)有限公司 | Battery detection circuit and detection method |
| CN106569135B (en) * | 2016-10-13 | 2019-07-02 | 捷开通讯(深圳)有限公司 | A kind of battery detection circuit and detection method |
| CN106786864A (en) * | 2016-12-14 | 2017-05-31 | 深圳市伟义兄弟进出口有限公司 | A kind of charger that can test battery parameter |
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Application publication date: 20150408 |