CN105005001A - Method for rapidly detecting remaining use times of battery - Google Patents
Method for rapidly detecting remaining use times of battery Download PDFInfo
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- CN105005001A CN105005001A CN201510357661.4A CN201510357661A CN105005001A CN 105005001 A CN105005001 A CN 105005001A CN 201510357661 A CN201510357661 A CN 201510357661A CN 105005001 A CN105005001 A CN 105005001A
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Abstract
The invention discloses a method for rapidly detecting remaining use times of batteries, and relates to the technical field of batteries. The method is based on the relation between a battery internal resistance and cycle times, can deduct the cycle times corresponding to the battery internal resistance according to the measured internal resistance of the battery, and comprises the steps of: A, measuring internal resistances of batteries of the same model with different cycle times at the same indoor temperature, and drawing a curve chart of relation between the internal resistances and cycle times of the batteries; B, dividing the curve chart into a plurality of stages and measuring the internal resistances of the adopted batteries of the same model; C, judging the corresponding stage in which the batteries are positioned according to the internal resistances measured in the previous step; D, and rapidly detecting the cycle times of the batteries and the remaining cycle times according to the judged stage in which the batteries are positioned. The method for rapidly detecting remaining use times of the batteries has high reliability, and is especially suitable for detecting batteries in mass production or during the process of using.
Description
Technical field
The present invention relates to cell art, particularly relate to the method detecting remaining battery access times fast.
Background technology
The internal resistance of battery is the important characterisitic parameter of battery, it is that weigh battery operation state with important parameter that is remaining battery serviceable life, the internal resistance of cell is larger, inside battery can be caused to generate heat when heavy-current discharge also larger, the rising of battery discharge temperature, can increase in the battery and a lot of secondary chemical reactions occurs, thus reduce the cycle life of battery.
The internal resistance of battery is not constant, is a variable, is constantly change in time in charge and discharge process.When battery is in different state of charge, its internal resistance is in different size, and under battery is in state in different serviceable life, its internal resistance is also different, can measure cycle index residing for battery and remaining cycle index fast based on this from the size of the internal resistance of cell.
Summary of the invention
The object of the invention is to solve the problem and disclose a kind of method of quick detection remaining battery access times, the method makes it possible to the internal resistance according to the battery measured based on the relation between the internal resistance of cell with cycle index and releases the cycle index corresponding with the internal resistance of cell, the method can obtain the service condition of battery fast, there is advantage with a high credibility, be particularly useful for the detection to battery in batch production or use procedure.
To achieve these goals, the technical scheme taked of the present invention is as follows:
The invention discloses a kind of method of quick detection remaining battery access times, the method comprises the following steps:
A, measure under same room temperature same size battery be in the cycle index of different batteries under internal resistance, and make the curve map of relation between internal resistance and the cycle index of battery;
B, above-mentioned curve map is divided into the internal resistance that several stages also measure the battery of the same model used;
C, judge stage of the correspondence residing for battery according to the internal resistance of surveying in previous step;
D, cycle index residing for battery and remaining cycle index can be detected fast according to the stage judging residing for battery.
Stage described in step B, C and D is three, comprises initial stage, stabilizator and latter stage, presents downtrending in described initial stage internal resistance, presents stable ascendant trend in described stabilizator internal resistance, presents sharply ascendant trend in described internal resistance in latter stage.
Described internal resistance stationary phase is changed to linear changing relation with cycle index.
The invention also discloses another kind of method, the method comprises the following steps:
S1, the electric current measuring same size battery under same room temperature and voltage, make voltage with discharge and recharge direction constant variation, equally spacedly obtains one group of voltage △ V, and electric current is obtained one group of △ Q in the time interval upper integral of each △ V;
S2, calculating △ V/ △ Q, and make the curve map of relation between △ V/ △ Q and the cycle index of battery;
S3, judge stage of the correspondence residing for battery according to the internal resistance of surveying in previous step;
S4, cycle index residing for battery and remaining cycle index can be detected fast according to the stage judging residing for battery.
Stage described in step S2, S3 and S4 is three, comprises initial stage, stabilizator and latter stage, presents downtrending at described initial stage △ V/ △ Q, presents stable downtrending at described stabilizator △ V/ △ Q, described latter stage △ V/ △ Q present sharply downtrending.
Described stationary phase, △ V/ △ Q was changed to linear changing relation with cycle index.
Beneficial effect of the present invention: the serviceable life of battery directly can not be measured and can not be passed through direct visual perception, the present invention is that other variable-internal resistance that can directly measure or indirectly obtain of certain rule change and △ V/ △ Q reflect the situation in serviceable life of battery by finding out with circulating battery number of times, simple and reliable, particularly when producing in batches or using battery, the situation in serviceable life of used battery can be detected by the present invention fast, avoid causing unnecessary battery waste and loss in man-hour.
Accompanying drawing explanation
1. Fig. 1 is the internal resistance of cell-cycle index curve map of the method for a kind of quick detection remaining battery access times of the present invention;
2. Fig. 2 is the △ V/ △ Q-cycle index curve map of the method for a kind of quick detection remaining battery access times of the present invention.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one
The invention discloses a kind of method of quick detection remaining battery access times, the method comprises the following steps:
A, measure under same room temperature same size battery be in the cycle index of different batteries under internal resistance, and make the curve map of relation between internal resistance and the cycle index of battery;
B, above-mentioned curve map is divided into the internal resistance that several stages also measure the battery of the same model used;
C, judge stage of the correspondence residing for battery according to the internal resistance of surveying in previous step;
D, cycle index residing for battery and remaining cycle index can be detected fast according to the stage judging residing for battery.
Stage described in step B, C and D is three, comprises initial stage, stabilizator and latter stage, presents downtrending in described initial stage internal resistance, presents stable ascendant trend in described stabilizator internal resistance, presents sharply ascendant trend in described internal resistance in latter stage.
Described internal resistance stationary phase is changed to linear changing relation with cycle index.
Be illustrated in figure 1 the internal resistance of cell-cycle index curve map, as can be seen from the figure internal resistance change experienced by 3 stages:
1. the initial stage, because the activation adjustment process that there is inside battery material composition, battery enters stable operation stage, so the internal resistance of cell declines to some extent;
2. stationary phase, in a very long time that battery normally runs, internal resistance keeps relative stability, milder rising;
3. latter stage, a period of time before battery life termination is battery discharge latter stage, and inside battery chemical substance activity reduces, and negative electrode lithium ion embeds ability and declines, and polarizing voltage increases, and internal resistance is quick ascendant trend.
Therefore, if wonder the access times of remaining battery, first must judge that the internal resistance of battery is which being in life cycle in stage, life-span of first stage account for battery can complete cycle discharge and recharge total degree about about 7%, the trend that subordinate phase internal resistance is risen is proportional rising, there is the linear relationship of r=kt+b, so t=(r-b)/k, entered a large amount of experimental data statistics, calculate b=98.75, k=0.125, therefore the number of times t1=550-t remaining use just can obtain easily, phase III almost also account for about the %7 of battery life.Therefore the number of times that remaining battery uses to be detected fast, as long as just judge which stage the internal resistance of battery is in.
Embodiment two
The invention also discloses the method that another detects remaining battery access times fast, comprise the steps:
S1, the electric current measuring same size battery under same room temperature and voltage, make voltage with discharge and recharge direction constant variation, equally spacedly obtains one group of voltage △ V, and electric current is obtained one group of △ Q in the time interval upper integral of each △ V;
S2, calculating △ V/ △ Q, and make the curve map of relation between △ V/ △ Q and the cycle index of battery;
S3, judge stage of the correspondence residing for battery according to the internal resistance of surveying in previous step;
S4, cycle index residing for battery and remaining cycle index can be detected fast according to the stage judging residing for battery.
Stage described in step S2, S3 and S4 is three, comprises initial stage, stabilizator and latter stage, presents downtrending at described initial stage △ V/ △ Q, presents stable downtrending at described stabilizator △ V/ △ Q, described latter stage △ V/ △ Q present sharply downtrending.
Described stationary phase, △ V/ △ Q was changed to linear changing relation with cycle index.
Be illustrated in figure 2 △ V/ △ Q-cycle index curve map, as can be seen from the figure the △ V/ △ Q of battery is also roughly divided into three corresponding stages: initial stage, stationary phase and latter stage.Be similar to a linear relationship stationary phase, △ V/ △ Q=kt+b, therefore residue uses cycle index (t)=(△ V/ △ Q)-b/k, enter to calculate k=-0.128, b=78.72, so residue use follows bad number of times t=(78.72-(△ V/ △ Q))/0.128, account for 7% and 15% of global cycle number of times respectively in initial stage and latter stage, therefore, with embodiment one, the number of times that remaining battery uses to be detected fast, as long as just judge which stage the internal resistance of battery is in.
The present invention is that other variable-internal resistance that can directly measure or indirectly obtain of certain rule change and △ V/ △ Q reflect the situation in serviceable life of battery by finding out with circulating battery number of times, become immeasurability into measuring, simple and reliable, particularly when producing in batches or using battery, the situation in serviceable life of used battery can be detected by the present invention fast, avoid causing unnecessary battery waste and loss in man-hour.
Finally should be noted that; above embodiment is only in order to illustrate technical scheme of the present invention; but not limiting the scope of the invention; although done to explain to the present invention with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to technical scheme of the present invention or equivalent replacement, and not depart from essence and the scope of technical solution of the present invention.
Claims (6)
1. detect a method for remaining battery access times fast, it is characterized in that: the method comprises the following steps:
A, measure under same room temperature same size battery be in the cycle index of different batteries under internal resistance, and make the curve map of relation between internal resistance and the cycle index of battery;
B, above-mentioned curve map is divided into the internal resistance that several stages also measure the battery of the same model used;
C, judge stage of the correspondence residing for battery according to the internal resistance of surveying in previous step;
D, cycle index residing for battery and remaining cycle index can be detected fast according to the stage judging residing for battery.
2. the method for a kind of quick detection remaining battery access times according to claim 1, it is characterized in that: the stage described in step B, C and D is three, comprise initial stage, stabilizator and latter stage, downtrending is presented in described initial stage internal resistance, present stable ascendant trend in described stabilizator internal resistance, present sharply ascendant trend in described internal resistance in latter stage.
3. the method for a kind of quick detection remaining battery access times according to claim 2, is characterized in that: described internal resistance stationary phase is changed to linear changing relation with cycle index.
4. detect a method for remaining battery access times fast, it is characterized in that: the method comprises the following steps:
S1, the electric current measuring same size battery under same room temperature and voltage, make voltage with discharge and recharge direction constant variation, equally spacedly obtains one group of voltage △ V, and electric current is obtained one group of △ Q in the time interval upper integral of each △ V;
S2, calculating △ V/ △ Q, and make the curve map of relation between △ V/ △ Q and the cycle index of battery;
S3, judge stage of the correspondence residing for battery according to the internal resistance of surveying in previous step;
S4, cycle index residing for battery and remaining cycle index can be detected fast according to the stage judging residing for battery.
5. the method for a kind of quick detection remaining battery access times according to claim 4, it is characterized in that: the stage described in step S2, S3 and S4 is three, comprise initial stage, stabilizator and latter stage, downtrending is presented at described initial stage △ V/ △ Q, present stable downtrending at described stabilizator △ V/ △ Q, described latter stage △ V/ △ Q present sharply downtrending.
6. the method for a kind of quick detection remaining battery access times according to claim 5, is characterized in that: described stationary phase, △ V/ △ Q was changed to linear changing relation with cycle index.
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CN105372601A (en) * | 2015-11-27 | 2016-03-02 | 深圳市新国都支付技术有限公司 | Method for detection of service life of storage battery |
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