CN102175976A - Electricity-taking method and device for detecting battery internal resistance - Google Patents
Electricity-taking method and device for detecting battery internal resistance Download PDFInfo
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- CN102175976A CN102175976A CN2011100316138A CN201110031613A CN102175976A CN 102175976 A CN102175976 A CN 102175976A CN 2011100316138 A CN2011100316138 A CN 2011100316138A CN 201110031613 A CN201110031613 A CN 201110031613A CN 102175976 A CN102175976 A CN 102175976A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000001514 detection method Methods 0.000 claims abstract description 31
- 238000005070 sampling Methods 0.000 claims abstract description 17
- 238000010586 diagram Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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Abstract
The invention discloses an electricity-taking method and device for detecting battery internal resistance. The method comprises the following steps of: generating at least a positive supply circuit and a negative supply circuit by a detected battery to supply power for at least one detecting circuit; and performing sampling the positive supply circuit and the negative supply circuit accurately. By using the electricity-taking method and device for detecting battery internal resistance, two or more than two detected batteries can be detected by using one detecting circuit; and the internal resistance of the detected battery can be detected on line or off line in real time and ultra-high common-mode rejection ratio can be obtained; the external influence on the detection precision is small, and the precision error can be less than 0.1 milliohm; the electricity-taking method and device for detecting battery internal resistance are applicable to various detection environments.
Description
Technical field
The present invention relates to internal resistance of cell detection range, specially refer to method and device that a kind of internal resistance of cell detects power taking.
Background technology
With reference to Fig. 1 and Fig. 2, in the prior art, the way to take power of internal resistance of cell checkout equipment generally includes:
1, from the electric main power taking, utilize AC/DC (ac/dc) transducer connection detection circuit, obtain needed voltage by independent power supply; (as shown in Figure 1)
2,, directly supply with testing circuit or pass through DC/DC (DC-DC) transducer connection detection circuit, for internal resistance of cell checkout equipment provides voltage from certain batteries power taking.(as shown in Figure 2)
In common internal resistance of cell pick-up unit, because the antijamming capability of detected signal and signal is all more intense, it is feasible therefore adopting above-mentioned dual mode.But in the testing circuit of some distinctive signals, the interference that power supply is introduced is very big to the influence of accuracy of detection.For example: if the order of magnitude of detected internal resistance of cell signal is the milliohm rank, then any interference of introducing from power supply all can cause testing result to produce very big deviation.Therefore, if use the detection mode of prior art will bring following problem:
The common-mode signal that exchanges in the aforesaid way 1 in the input can be transmitted to power supply output, directly influences accuracy of detection; AC/DC transducer in the aforesaid way 1 can produce common mode and differential mode interference, influences accuracy of detection; The DC/DC transducer can produce common mode and differential mode interference in the aforesaid way 2, influences accuracy of detection.
Summary of the invention
Method and the device of fundamental purpose of the present invention for providing a kind of internal resistance of cell to detect power taking promoted the precision that the internal resistance of cell detects.
The present invention proposes the method that a kind of internal resistance of cell detects power taking, comprises step:
Tested battery is generated positive and negative at least duplex feeding circuit, be at least one testing circuit power supply;
Described positive and negative duplex feeding circuit is carried out sampling with high precision.
Preferably, described with the positive and negative at least duplex feeding circuit of tested battery generation, at least one testing circuit power supply specifically comprises:
Described tested battery is divided into one group of even number; Wherein, every group generates positive and negative duplex feeding circuit, is testing circuit power supply; Described tested battery is at least two.
Preferably, described with the positive and negative at least duplex feeding circuit of tested battery generation, at least one testing circuit power supply also specifically comprises:
When described tested battery is divided into two one group and described tested battery and is even number, two one group on then tested battery, every group generates positive and negative duplex feeding circuit, is testing circuit power supply;
When described tested battery was divided into two one group and described tested battery and is odd number, last three generated two groups of positive and negative duplex feeding circuit, are respectively two testing circuits power supplies.
Preferably, described method also comprises:
Detect the duty of described tested battery, select the relevant detection mode according to described duty.
The present invention also proposes the device that a kind of internal resistance of cell detects power taking, comprising:
Supply module is used for tested battery is generated positive and negative at least duplex feeding circuit, is at least one testing circuit power supply;
Sampling module is used for described positive and negative duplex feeding circuit is carried out sampling with high precision.
Preferably, described supply module specifically is used for:
Described tested battery is divided into one group of even number; Wherein, every group generates positive and negative duplex feeding circuit, is testing circuit power supply; Described tested battery is at least two.
Preferably, described supply module also specifically is used for:
When described tested battery is divided into two one group and described tested battery and is even number, two one group on then tested battery, every group generates positive and negative duplex feeding circuit, is testing circuit power supply;
When described tested battery was divided into two one group and described tested battery and is odd number, last three generated two groups of positive and negative duplex feeding circuit, are respectively two testing circuits power supplies.
Preferably, described device also comprises:
The Intelligence Selection module is used to detect the duty of described tested battery, selects the relevant detection mode according to described duty.
The internal resistance of cell of the present invention detects the method and the device of power taking, can use a testing circuit to detect two or more tested battery; Can be online or off-line detect the internal resistance of tested battery in real time, and have high common-mode rejection ratio, it is very little that accuracy of detection is influenced by external interference, trueness error can adapt to multiple testing environment less than 0.1 milliohm.
Description of drawings
Fig. 1 is the structural representation of internal resistance of cell checkout equipment one way to take power in the prior art;
Fig. 2 is the structural representation of another way to take power of internal resistance of cell checkout equipment in the prior art;
Fig. 3 is the steps flow chart synoptic diagram that the internal resistance of cell of the present invention detects method one embodiment of power taking;
Fig. 4 is the detection architecture synoptic diagram of one group of tested battery during the internal resistance of cell of the present invention detects;
Fig. 5 is the idiographic flow synoptic diagram of the step 10 of the internal resistance of cell of the present invention method one embodiment that detects power taking;
Fig. 6 is the detection architecture synoptic diagram of the tested battery of even number during the internal resistance of cell of the present invention detects;
Fig. 7 is the detection architecture synoptic diagram of the tested battery of odd number during the internal resistance of cell of the present invention detects;
Fig. 8 is another steps flow chart synoptic diagram that the internal resistance of cell of the present invention detects method one embodiment of power taking;
Fig. 9 is the structural representation that the internal resistance of cell of the present invention detects device one embodiment of power taking;
Figure 10 is another structural representation that the internal resistance of cell of the present invention detects device one embodiment of power taking.
The realization of the object of the invention, functional characteristics and advantage will be in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
With reference to Fig. 3, the embodiment that a kind of internal resistance of cell of the present invention detects the method for power taking is proposed.This method comprises:
Step S10, tested battery being generated positive and negative at least duplex feeding circuit, is at least one testing circuit power supply;
Step S11, described positive and negative duplex feeding circuit is carried out sampling with high precision.
When electric battery being carried out the internal resistance detection, the tested battery in this electric battery is generated at least one positive one negative duplex feeding circuit, be the testing circuit power supply.Can generate the feed circuit of a positive and negative two-way by at least two tested batteries, then above-mentioned tested battery must be at least two (with reference to Fig. 4).Above-mentioned testing circuit connects just (utmost point) output terminal of two tested batteries, negative (utmost point) output terminal respectively, and the joint of two tested batteries; The joint tie point of wherein setting testing circuit and two tested batteries is a zero level, and then an end (positive pole) of two tested batteries is exported positive voltage, and the other end (negative pole) output negative voltage forms positive and negative duplex feeding circuit, is the testing circuit power supply.Above-mentioned sampling with high precision is sampling precision and can accomplishes about 0.1mV.
Above-mentioned tested battery can be divided into two one group, for a testing circuit provides power supply.The grouping of this tested battery can also extend to four, six and octet etc., and promptly the tested battery of even number is one group; And this tested battery can be divided into many groups, and the corresponding testing circuit of each group is for this testing circuit provides power supply, so that carry out the detection of the internal resistance of cell.
Above-mentioned testing circuit can carry out sampling with high precision to the positive and negative duplex feeding circuit that above-mentioned tested battery generates.This sampling with high precision can be undertaken by operational amplifier.
The above-mentioned internal resistance of cell detects the method for power taking, can use a testing circuit to detect two or more tested battery; Can be online or off-line detect the internal resistance of tested battery in real time, and have high common-mode rejection ratio, it is very little that accuracy of detection is influenced by external interference, trueness error can adapt to multiple testing environment less than 0.1 milliohm.Online in real time detects and to be meant in the tested battery use, is not influencing under the situation that battery uses, and online battery is detected, and adopts usually and detects battery charging and discharging ripple current and voltage, obtains the internal resistance of cell by calculating then; Off-line detects in real time and is meant that tested battery under idle situation, detects in real time, must initiatively injecting ripple current to battery in such cases, comes the counting cell internal resistance by ripple voltage and the electric current that detects the battery two ends then.
With reference to Fig. 5, when being one group with two tested batteries, above-mentioned steps S10 specifically comprises:
Step S101, when described tested battery is divided into two one group and described tested battery and is even number, two one group on then tested battery, every group generates positive and negative duplex feeding circuit, is testing circuit power supply; Perhaps,
Step S102, when described tested battery is divided into two one group and described tested battery and is odd number, last three generate two groups of positive and negative duplex feeding circuit, are respectively two testing circuits power supplies.
Herein, be example for one group with two tested batteries, when the tested battery in the detected electric battery is a plurality of (above two), if when tested battery is even number, two one group on then tested battery, but complete packet does not have residue; And every group generates positive and negative duplex feeding circuit, and corresponding testing circuit carries out internal resistance and detects (with reference to Fig. 6).But when tested battery was odd number, two one group on tested battery then can not complete packet; Therefore, can be with remaining last three one group in twos, one of them tested battery generates the feed circuit of two groups of positive and negative two-way respectively with two other, and respectively corresponding two testing circuits carry out internal resistance and detect.This tested battery that belongs to two groupings simultaneously can all be negative output or all is positive output in two groups of positive and negative duplex feeding circuit.(with reference to Fig. 7)
With reference to Fig. 8, the method that the above-mentioned internal resistance of cell detects power taking also comprises:
The duty of step S110, the described tested battery of detection is selected the relevant detection mode according to described duty.
Before positive and negative duplex feeding circuit is sampled, can be according to the duty of battery, intelligence is adjusted the mode that internal resistance detects.Wherein, can choose the internal resistance that suitable internal resistance detection mode detects battery according to the ripple current value of tested battery.Such as during less than preset value (as 100), using initiatively metering system in the ripple current value; And, during greater than preset value, use passive measurement mode etc. in the ripple current value.So, the method that can make the above-mentioned internal resistance of cell detect power taking adapts to different testing environments.
With reference to Fig. 9, the embodiment that a kind of internal resistance of cell of the present invention detects the device of power taking is proposed.This device comprises:
When electric battery being carried out the internal resistance detection, by supply module 21 the tested battery in this electric battery is generated at least one positive one negative duplex feeding circuit, be the testing circuit power supply.Can generate the feed circuit of a positive and negative two-way by at least two tested batteries, then above-mentioned tested battery must be at least two (with reference to Fig. 4).Above-mentioned testing circuit connects just (utmost point) output terminal of two tested batteries, negative (utmost point) output terminal respectively, and the joint of two tested batteries; The joint tie point of wherein setting testing circuit and two tested batteries is a zero level, and then an end (positive pole) of two tested batteries is exported positive voltage, and the other end (negative pole) output negative voltage forms positive and negative duplex feeding circuit, is the testing circuit power supply.
Above-mentioned tested battery can be divided into two one group, for a testing circuit provides power supply.The grouping of this tested battery can also extend to four, six and octet etc., and promptly the tested battery of even number is one group; And this tested battery can be divided into many groups, and the corresponding testing circuit of each group is for this testing circuit provides power supply, so that carry out the detection of the internal resistance of cell.
Above-mentioned sampling module 22 can carry out sampling with high precision to the positive and negative duplex feeding circuit that above-mentioned tested battery generates.This sampling with high precision can be undertaken by operational amplifier.
The above-mentioned internal resistance of cell detects the device of power taking, can use a testing circuit to detect two or more tested battery; Can be online or off-line detect the internal resistance of tested battery in real time, and have high common-mode rejection ratio, it is very little that accuracy of detection is influenced by external interference, trueness error can adapt to multiple testing environment less than 0.1 milliohm.Online in real time detects and to be meant in the tested battery use, is not influencing under the situation that battery uses, and online battery is detected, and adopts usually and detects battery charging and discharging ripple current and voltage, obtains the internal resistance of cell by calculating then; Off-line detects in real time and is meant that tested battery under idle situation, detects in real time, must initiatively injecting ripple current to battery in such cases, comes the counting cell internal resistance by ripple voltage and the electric current that detects the battery two ends then.
Above-mentioned supply module 21 also specifically is used for: when described tested battery is divided into two one group and described tested battery and is even number, and two one group on then tested battery, every group generates positive and negative duplex feeding circuit, is testing circuit power supply; Perhaps, when described tested battery was divided into two one group and described tested battery and is odd number, last three generated two groups of positive and negative duplex feeding circuit, are respectively two testing circuits power supplies.
Herein, be example for one group with two tested batteries, when the tested battery in the detected electric battery is a plurality of (above two), if when tested battery is even number, two one group on then tested battery, but complete packet does not have residue; And every group generates positive and negative duplex feeding circuit, and corresponding testing circuit carries out internal resistance and detects (with reference to Fig. 6).But when tested battery was odd number, two one group on tested battery then can not complete packet; Therefore, can be with remaining last three one group in twos, one of them tested battery generates the feed circuit of two groups of positive and negative two-way respectively with two other, and respectively corresponding two testing circuits carry out internal resistance and detect.This tested battery that belongs to two groupings simultaneously can all be negative output or all is positive output in two groups of positive and negative duplex feeding circuit.(with reference to Fig. 7)
With reference to Figure 10, said apparatus also comprises: Intelligence Selection module 23, be used to detect the duty of described tested battery, and select the relevant detection mode according to described duty.
Before positive and negative duplex feeding circuit was sampled, above-mentioned Intelligence Selection module 23 can be according to the duty of battery, and intelligence is adjusted the mode that internal resistance detects.Wherein, can choose the internal resistance that suitable internal resistance detection mode detects battery according to the ripple current value of tested battery.Such as during less than preset value (as 100), using initiatively metering system in the ripple current value; And, during greater than preset value, use passive measurement mode etc. in the ripple current value.So, the device that can make the above-mentioned internal resistance of cell detect power taking adapts to different testing environments.
The above only is the preferred embodiments of the present invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes instructions of the present invention and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (8)
1. the method for an internal resistance of cell detection power taking is characterized in that, comprises step:
Tested battery is generated positive and negative at least duplex feeding circuit, be at least one testing circuit power supply;
Described positive and negative duplex feeding circuit is carried out sampling with high precision.
2. the internal resistance of cell according to claim 1 detects the method for power taking, it is characterized in that, and is described with the positive and negative at least duplex feeding circuit of tested battery generation, at least one testing circuit power supply specifically comprises:
Described tested battery is divided into one group of even number; Wherein, every group generates positive and negative duplex feeding circuit, is testing circuit power supply; Described tested battery is at least two.
3. the internal resistance of cell according to claim 2 detects the method for power taking, it is characterized in that, and is described with the positive and negative at least duplex feeding circuit of tested battery generation, at least one testing circuit power supply also specifically comprises:
When described tested battery is divided into two one group and described tested battery and is even number, two one group on then tested battery, every group generates positive and negative duplex feeding circuit, is testing circuit power supply;
When described tested battery was divided into two one group and described tested battery and is odd number, last three generated two groups of positive and negative duplex feeding circuit, are respectively two testing circuits power supplies.
4. detect the method for power taking according to each described internal resistance of cell in the claim 1 to 3, it is characterized in that described method also comprises:
Detect the duty of described tested battery, select the relevant detection mode according to described duty.
5. the device of an internal resistance of cell detection power taking is characterized in that, comprising:
Supply module is used for tested battery is generated positive and negative at least duplex feeding circuit, is at least one testing circuit power supply;
Sampling module is used for described positive and negative duplex feeding circuit is carried out sampling with high precision.
6. the internal resistance of cell according to claim 5 detects the device of power taking, it is characterized in that described supply module specifically is used for:
Described tested battery is divided into one group of even number; Wherein, every group generates positive and negative duplex feeding circuit, is testing circuit power supply; Described tested battery is at least two.
7. the internal resistance of cell according to claim 6 detects the device of power taking, it is characterized in that described supply module also specifically is used for:
When described tested battery is divided into two one group and described tested battery and is even number, two one group on then tested battery, every group generates positive and negative duplex feeding circuit, is testing circuit power supply;
When described tested battery was divided into two one group and described tested battery and is odd number, last three generated two groups of positive and negative duplex feeding circuit, are respectively two testing circuits power supplies.
8. detect the device of power taking according to each described internal resistance of cell in the claim 5 to 7, it is characterized in that described device also comprises:
The Intelligence Selection module is used to detect the duty of described tested battery, selects the relevant detection mode according to described duty.
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| CN201110031613.8A CN102175976B (en) | 2011-01-28 | 2011-01-28 | Electricity-taking method and device for detecting battery internal resistance |
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| CN201110031613.8A CN102175976B (en) | 2011-01-28 | 2011-01-28 | Electricity-taking method and device for detecting battery internal resistance |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103176134A (en) * | 2011-12-26 | 2013-06-26 | 中国移动通信集团安徽有限公司 | Online storage battery capacity estimation method |
| CN107797075A (en) * | 2017-11-29 | 2018-03-13 | 福州福光电子有限公司 | A kind of circuit and method of distributed on-line measurement lead-acid accumulator monomer internal resistance |
| CN110828917A (en) * | 2019-11-13 | 2020-02-21 | 海南电网有限责任公司电力科学研究院 | Storage battery online sulfur removal system and method based on variable frequency signals |
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| CN2389376Y (en) * | 1999-09-15 | 2000-07-26 | 哈尔滨子木新能源技术有限公司 | Online internal resistance measurer for accumulator |
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| CN103176134A (en) * | 2011-12-26 | 2013-06-26 | 中国移动通信集团安徽有限公司 | Online storage battery capacity estimation method |
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| CN107797075A (en) * | 2017-11-29 | 2018-03-13 | 福州福光电子有限公司 | A kind of circuit and method of distributed on-line measurement lead-acid accumulator monomer internal resistance |
| CN110828917A (en) * | 2019-11-13 | 2020-02-21 | 海南电网有限责任公司电力科学研究院 | Storage battery online sulfur removal system and method based on variable frequency signals |
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| CN102175976B (en) | 2015-05-13 |
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Address after: 518051 east wing, 1 / F, building 1, Weixin Software Park, Nanshan District, Shenzhen, Guangdong. Patentee after: SHENZHEN CITY HEADSUN TECHNOLOGY CO.,LTD. Address before: 518052 South District, 3 floor, C building, South Garden Industrial Park, Nanshan District Xinyuan Road, Shenzhen, Guangdong. Patentee before: Shenzhen Headsun Technology Co.,Ltd. |
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Application publication date: 20110907 Assignee: Shenzhen Haidesen Digital Energy Technology Co.,Ltd. Assignor: SHENZHEN CITY HEADSUN TECHNOLOGY CO.,LTD. Contract record no.: X2023980050123 Denomination of invention: The method and device for detecting the internal resistance of batteries and obtaining electricity Granted publication date: 20150513 License type: Common License Record date: 20231206 |
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