CN201965182U - Testing system for low-current circulating excitation battery internal resistance - Google Patents

Testing system for low-current circulating excitation battery internal resistance Download PDF

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Publication number
CN201965182U
CN201965182U CN2010206943891U CN201020694389U CN201965182U CN 201965182 U CN201965182 U CN 201965182U CN 2010206943891 U CN2010206943891 U CN 2010206943891U CN 201020694389 U CN201020694389 U CN 201020694389U CN 201965182 U CN201965182 U CN 201965182U
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CN
China
Prior art keywords
internal resistance
accumulator
operational amplifier
low
stabilivolt
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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.)
Expired - Lifetime
Application number
CN2010206943891U
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Chinese (zh)
Inventor
李明星
杨冬强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HANGZHOU HUASUGUARD NETWORK TECHNOLOGY Co Ltd
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HANGZHOU HUASUGUARD NETWORK TECHNOLOGY Co Ltd
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Priority to CN2010206943891U priority Critical patent/CN201965182U/en
Application granted granted Critical
Publication of CN201965182U publication Critical patent/CN201965182U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model relates to the field of storage battery internal resistance testing, particularly to a testing system for low-current circulating excitation battery internal resistance, which aims to overcome the defects of the conventional storage battery internal resistance testing system that high-current discharge calculation is not quite safe and low-current discharge reduces measuring precision. The testing system for low-current circulating excitation battery internal resistance provided by the utility model comprises discharging devices which are connected in parallel on the anode and cathode of the storage battery, and is characterized in that a differential voltage amplifier is connected in parallel with the anode and cathode of the storage battery; the output of the differential voltage amplifier is connected with a D/A converter; and the output of the D/A converter is connected with a microprocessor. By adopting the low-current circulating excitation discharging with the current range from 2A to 10A and the differential amplifying technology to precisely measure the internal resistance of the storage battery, the safety hazard caused as the conventional testing system adopts the high-current discharge measurement is avoided, and the measuring precision is high.

Description

A kind of little current cycle excitation internal resistance of cell test macro
Technical field
The utility model relates to the accumulator internal resistance field tests, particularly a kind of little current cycle excitation internal resistance of cell test macro.
Background technology
The method of common test accumulator quality is directly by checking discharge, utilizes the internal resistance size of the voltage calculating accumulator reality that constant discharge current and accumulator two ends measure.Not only waste time and energy yet check discharge calculating accumulator actual capacity, also influence the safety of system's operation, and this method such as frequent use can destroy the integrality of the energy.At present the portable accumulator internal resistance test macro of off-line type is in the widespread use of many business-like battery testings, the system of most of this measurement internal resistance all is the method calculating accumulator internal resistance by big electric current (greater than 20A) discharge, carry out heavy-current discharge and have potential safety hazard, adopt little electric current can reduce measuring accuracy again.In addition, existing accumulator internal resistance test macro all is an off-line measurement, and the user can not understand the battery-operated situation of oneself constantly.
Summary of the invention
The technical assignment that the utility model proposes is to overcome existing heavy-current discharge test macro to use heavy-current discharge to have potential safety hazard, technological deficiency that the low discharging current measuring accuracy is low, a kind of little current cycle excitation internal resistance of cell test macro that provide safe in utilization, measuring accuracy is high.
The technical scheme that the utility model technical solution problem adopts: a kind of little current cycle excitation internal resistance of cell test macro, comprise the electric discharge device that is connected in parallel on accumulator the two poles of the earth, it is characterized in that being parallel with on described accumulator the two poles of the earth an elementary errors voltage amplifier, the output of described elementary errors voltage amplifier connects a digital to analog converter, digital to analog converter output connecting microprocessor.By electric discharge device accumulator is carried out little current excitation discharge, utilizing the elementary errors voltage amplifier that the subtle change of voltage on the accumulator is measured then amplifies, voltage after the amplification becomes digital signal through digital to analog converter and delivers to microprocessor, last meter is calculated the internal resistance of accumulator, the utility model adopts little electric current, and (range of current 2A~10A) just can measure the internal resistance of accumulator accurately, has solved the potential safety hazard that heavy-current discharge exists under the situation that guarantees measuring accuracy.
Described elementary errors voltage amplifier is made up of operational amplifier and stabilivolt, the output terminal linking number weighted-voltage D/A converter of operational amplifier, the positive input of operational amplifier connects the positive pole of accumulator, the reverse input end of operational amplifier connects the negative pole of stabilivolt, the positive pole of stabilivolt connects the negative pole of accumulator, is connected with lead between the output terminal of operational amplifier and the stabilivolt.The elementary errors voltage amplifier of being made up of stabilivolt and operational amplifier can amplify back output to the subtle change of voltage on the accumulator, its elementary errors amplification principle is that stabilivolt can be adjusted output voltage automatically according to the variation of operational amplifier cathode voltage, described lead plays retroactive effect, adjust the voltage of stabilivolt output according to the voltage of operational amplifier output, make the maximum difference of operational amplifier cathode voltage and stabilivolt output voltage below 1V, by operational amplifier voltage is subtracted each other and amplifies then, the subtle change of voltage is become very big variation, thereby improve the sampling precision of digital to analog converter greatly, so that finally accurately measure the internal resistance of accumulator.
Described microprocessor is provided with network interface.By network interface the direct and existing computer system network of microprocessor is connected, just the energy online at any time is measured the internal resistance size of calculating accumulator, understands the working condition of accumulator immediately.
The utility model adopts little current cycle excitation charging method, and (range of current 2A~10A) and elementary errors amplifying technique accurately measure the internal resistance of accumulator, the potential safety hazard of having avoided existing test macro to adopt heavy-current discharge to measure, and measuring accuracy height.
Description of drawings
Fig. 1: circuit block diagram of the present utility model.
Among the figure: 1. electric discharge device, 2. accumulator, 3. stabilivolt, 4. operational amplifier, 5. digital to analog converter, 6. microprocessor, 7. elementary errors voltage amplifier, 8. lead.
Embodiment
Below in conjunction with description of drawings and embodiment the utility model is described further.
As shown in Figure 1, a kind of little current cycle excitation internal resistance of cell test macro, comprise the electric discharge device 1 that is connected in parallel on accumulator 2 the two poles of the earth, described accumulator is parallel with an elementary errors voltage amplifier 7 on 2 the two poles of the earth, described elementary errors voltage amplifier is made up of operational amplifier 4 and stabilivolt 3, the positive input of operational amplifier 4 connects the positive pole of accumulator 2, the reverse input end of operational amplifier 4 connects the negative pole of stabilivolt 3, the positive pole of stabilivolt 3 connects the negative pole of accumulator 2, be connected with lead 8 between the output terminal of operational amplifier 4 and the stabilivolt 3, the output terminal linking number weighted-voltage D/A converter 5 of operational amplifier 4, digital to analog converter output connecting microprocessor 6, microprocessor 6 is provided with network interface.
During use, carry out different round-robin low discharging currents by electric discharge device according to the capacity difference of battery, the elementary errors voltage amplifier of being made up of stabilivolt and operational amplifier in discharge process amplifies the subtle change of voltage on the accumulator, its elementary errors amplification principle is that stabilivolt can be adjusted output voltage automatically according to the variation of operational amplifier cathode voltage, lead plays retroactive effect, adjust the voltage of stabilivolt output according to the voltage of operational amplifier output, make the maximum difference of operational amplifier cathode voltage and stabilivolt output voltage below 1V, by operational amplifier voltage is subtracted each other and amplifies then, the subtle change of voltage is become very big variation, export to digital to analog converter, improve the sampling precision of digital to analog converter (being the A/D circuit) greatly, digital to analog converter becomes input voltage into digital signal and delivers to microprocessor, finally the internal resistance that accurately records accumulator.In addition, the direct and existing computer system network of microprocessor can be connected by network interface, just the energy online at any time is measured the internal resistance size of calculating accumulator, understands the working condition of accumulator immediately.

Claims (3)

1. one kind little current cycle encourages internal resistance of cell test macro, comprise the electric discharge device (1) that is connected in parallel on accumulator (2) the two poles of the earth, it is characterized in that being parallel with an elementary errors voltage amplifier (7) on described accumulator (2) the two poles of the earth, the output of described elementary errors voltage amplifier (7) connects a digital to analog converter (5), digital to analog converter output connecting microprocessor (6).
2. a kind of little current cycle excitation internal resistance of cell test macro according to claim 1, it is characterized in that described elementary errors voltage amplifier (7) is made up of operational amplifier (4) and stabilivolt (3), the output terminal linking number weighted-voltage D/A converter (5) of operational amplifier (4), the positive input of operational amplifier (4) connects the positive pole of accumulator (2), the reverse input end of operational amplifier (4) connects the negative pole of stabilivolt (3), the positive pole of stabilivolt (3) connects the negative pole of accumulator (2), is connected with lead (8) between the output terminal of operational amplifier (4) and the stabilivolt (3).
3. a kind of little current cycle excitation internal resistance of cell test macro according to claim 1 and 2 is characterized in that described microprocessor (6) is provided with network interface.
CN2010206943891U 2010-12-31 2010-12-31 Testing system for low-current circulating excitation battery internal resistance Expired - Lifetime CN201965182U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010206943891U CN201965182U (en) 2010-12-31 2010-12-31 Testing system for low-current circulating excitation battery internal resistance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010206943891U CN201965182U (en) 2010-12-31 2010-12-31 Testing system for low-current circulating excitation battery internal resistance

Publications (1)

Publication Number Publication Date
CN201965182U true CN201965182U (en) 2011-09-07

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CN2010206943891U Expired - Lifetime CN201965182U (en) 2010-12-31 2010-12-31 Testing system for low-current circulating excitation battery internal resistance

Country Status (1)

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CN (1) CN201965182U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102998538A (en) * 2012-11-09 2013-03-27 安凯 Internal resistance measurement interference removal method for storage battery
CN103163378A (en) * 2011-12-08 2013-06-19 哈尔滨智木科技有限公司 Battery polarization internal resistance measuring method
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
CN110209628A (en) * 2019-06-05 2019-09-06 杭州华塑加达网络科技有限公司 First-order lag filters generating means and method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103163378A (en) * 2011-12-08 2013-06-19 哈尔滨智木科技有限公司 Battery polarization internal resistance measuring method
CN102998538A (en) * 2012-11-09 2013-03-27 安凯 Internal resistance measurement interference removal method for storage battery
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
CN103278695B (en) * 2013-06-05 2016-08-17 安徽安凯汽车股份有限公司 A kind of electric car power battery pack internal resistance monitoring system and monitoring method thereof
CN110209628A (en) * 2019-06-05 2019-09-06 杭州华塑加达网络科技有限公司 First-order lag filters generating means and method

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Granted publication date: 20110907

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