CN1212373A - Method for detecting residual capacitance of storage battery - Google Patents
Method for detecting residual capacitance of storage battery Download PDFInfo
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- CN1212373A CN1212373A CN 97116916 CN97116916A CN1212373A CN 1212373 A CN1212373 A CN 1212373A CN 97116916 CN97116916 CN 97116916 CN 97116916 A CN97116916 A CN 97116916A CN 1212373 A CN1212373 A CN 1212373A
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Abstract
The method for measuring residual charge capacity of cell is characterized by that it makes the cell discharge for a small period of time, and at the same time measures the end voltage value of cell and its discharge current value, and uses that the end voltage of the cell and discharging rate in said period of time possess an inversely-proportional proportionality constant to obtain the discharge rate, then multiplies the discharge current by said discharge rate so as to obtain the residual charge capacity.
Description
The present invention is meant a kind of method of testing of battery behavior, and detailed is the method for testing that refers to a kind of remaining battery capacitance of storage.
Press, computer or communications equipment room are for maintaining civil power and interrupt or during the rectifying installation fault, can provide DC current to continue to keep the regular event of items of equipment, must use various battery pack, this battery pack is connected to rectifying installation floating charge (Floating charge) at ordinary times, remains on full state in case of need.
Battery pack is mounted appropriate, after finishing initial charge (Initial charge) and discharge test and recharging, promptly being added into DC power-supply system uses, yet accumulator is after after a while, coming off of Chang Yiyin activity (effectively) material, or factor such as pole plate sclerosis and degenerating, capacitance of storage is lowered gradually, and its internal resistance also increase gradually.Usually this kind undesirable condition battery may be only one or two in whole group storage battery, but because whole Battery pack is that each monocell is composed in series, therefore the residue capacitance of storage deficiency or the internal resistance of one of them battery are excessive, to cause battery when discharge, this bad battery may cause reversed charge, and become the load of this electric battery, near and seriously influence the power supply capacity of this Battery pack.Therefore our residue electric power storage ability and its characteristic that must in all sorts of ways and understand electric battery paralyses communication facilities or UPS to guarantee when civil power interrupts, to be unlikely because of electric battery is bad.
About traditional storage battery group residue capacitance of storage test method.
The test of traditional storage battery group residue capacitance of storage is that electric battery is separated with its equipment of powering (as UPSs such as communication facilities or computer equipments), and connect fictitious load (as resistance etc.) and make discharge test, because the capacity (AH ampere hour) that the electric current of discharge test and time are decided by battery, because general discharge test is with 10 hours or discharge in 8 hours, so battery as 3200AH, discharge with 8 hour rates, then electric current is 400A, so capacity test of every work one Battery pack, need spend the discharge of a few hours, charging with tens hours, just can estimate its capacity, and must there be the people to take care of on the side at any time at the whole test center, write down the voltage of each battery, the proportion of electrolytic solution, temperature etc., ten minutes labor intensive and time, and waste energy, be example particularly with present area communication equipment, its battery pack includes 24 above batteries, declare at any time and know each battery behavior, quality very is not easy, the maintenance cost height of electric battery not only, and can not guarantee when civil power interrupts, to have the power supply capacity of expection.
Edge is, the inventor is at above-mentioned disappearance, be that pains are researched and developed " a kind of method of testing of electric properties of battery unit " and obtain No. 60688 patent of invention on record, the major technique of this case is to utilize to fill, interdischarge interval, the voltage of each battery and electric current can be delivered to computer record via the multiloop potential tester automatically, Deng filling, after discharge test is finished, computer will be according to the terminal voltage of each battery of electric battery, calculate the characteristic of battery out of the ordinary in the internal resistance during with charging of when discharge, plot curve by the internal resistance characteristic, and plot electric properties of battery unit curve comparison diagram in regular turn, by the spacing of this family curve comparison diagram to declare the individual cell characteristic of knowing electric battery.
Yet the foregoing invention case still has weak point, it is the family curve comparison diagram, be with each battery behavior curve and be plotted on the same comparison diagram, because curve quantity is too much, if the inappropriate amplification of dimension scale (SIZE SCALE), easily gives birth to and mix and influence interpretation, and it is to utilize sight line to go the variation of interpretation voltage one internal drag curve, and learn than difference battery, but for any battery, and can't learn its indivedual residue capacitance of storage; Simultaneously, its charge and discharge test duration still was about slightly 50-60 minute, still felt long in time.
In view of this, fundamental purpose of the present invention is the method for testing that is to provide a kind of remaining battery capacitance of storage, and its residue capacitance of storage at each battery is done a datumization interpretation, can clearly provide and declare the reader.
A further object of the present invention is the method for testing that is to provide a kind of remaining battery capacitance of storage, and its test duration is short, has quick benefit, can reduce expending of time and cost in a large number.
The method of testing of a kind of remaining battery capacitance of storage of the present invention, it is characterized in that, be that battery is imposed a bit of time of discharge, measure battery terminal voltage value and discharge current value simultaneously, and utilize battery terminal voltage and discharge rate between this section, to have the proportionality constant of an inverse ratio, then try to achieve discharge rate, again this discharge rate be multiply by discharge current, get final product the residue capacitance of storage; Wherein the inverse ratio proportionality constant of this section can be tried to achieve discharge rate divided by the terminal voltage value; Wherein the terminal voltage value is to utilize the relation of inverse ratio, contrasts discharge rate with insertion; Wherein the terminal voltage value is to utilize the relation of inverse ratio, contrasts discharge rate with diagram method.
Relevant of the present invention than concrete grammar, effect and characteristics, can get by the explanation of following examples conjunction with figs. and fully understand, wherein:
Fig. 1 is under the discharge current I1, the graph of a relation of its terminal voltage and discharge rate.
At first, the method for testing of a kind of remaining battery capacitance of storage of this case, in the time of need being based upon discharge, the basic theories of battery behavior and the differentiation of empirical value are inferred, be will be described as follows now:
(1) internal resistance of cell R and rough being directly proportional of battery terminal voltage V drop-out value
Because battery is in discharge process, the mutual theory relation of the internal resistance of cell and terminal voltage is as follows:
The chemical potential E-terminal voltage V of discharge current I * internal resistance of cell R=battery
Because of battery under floating charge state, the chemical potential E of battery can be considered a constant, and discharge current I is particular value, is directly proportional with terminal voltage V drop-out value so the internal resistance of cell is rough; That is internal resistance R is bigger, and terminal voltage V drop-out value is bigger.
(2) internal resistance of cell R and rough being inversely proportional to of residue capacitance of storage C
Show that at experimentation residue capacitance of storage C is bigger during battery discharge, R is littler in internal resistance; Otherwise internal resistance R is healed when big, and C is littler for the residue capacitance of storage.
(3) battery terminal voltage V drop-out value and rough being inversely proportional to of residue capacitance of storage C
Reasoning and judging by above-mentioned (one), (two), internal resistance of cell R and terminal voltage V descend and should reach the interactive relationship of residue capacitance of storage C, battery terminal voltage V drop-out value is inversely proportional to residue capacitance of storage C as can be known, that is residue capacitance of storage C is bigger, and then terminal voltage V drop-out value is littler.
(4) electric current and discharge rate K is rough is inversely proportional to
Because residue capacitance of storage C=discharge current I * discharge rate K
Therefore discharge current one timing, discharge rate K is directly proportional with residue capacitance of storage C, that is infers that by (three) this discharge rate K and terminal voltage V drop-out value are inversely proportional to.
Above-mentioned (one), (2), (3), (4) deduction process, what terminal voltage V drop-out value and discharge rate K courageously supposed in main system is being, this is because in battery discharge procedure, it is under detectable certain partial discharge electric current I, its terminal voltage V can record, but residue capacitance of storage C also can't learn, therefore through inferring the terminal voltage V drop-out value of battery under this experiment and the theoretical foundation and discharge rate K is rough is inversely proportional to, again through the inventor in the discharge test process, under specific currents I1, the interactive coordinate of record terminal voltage V and discharge rate K, as shown in Figure 1, though its line segment is fluctuation and is two sections as can be known, under the line segment of away minor segment separates, its inverse relation still can be set up, and can obtain its inverse ratio proportionality constant F; In fact, through the present invention at different partial discharge electric current 12,13,14 ... down, though the interactive relationship of record terminal voltage V and discharge rate K is for fluctuation and be multistage, but the line segment of away minor segment separates down, the inverse relation of this terminal voltage and discharge rate all can be set up, and under the different sections, different inverse ratio proportionality constant F all can try to achieve
That is under certain different partial discharge electric current I, this electric battery terminal voltage V and discharge rate K are under different away minor segment, and its relation is as follows:
Therefore, at different discharging conditions, this F (proportionality constant) all can experiment method obtain or with battery terminal voltage V with
Relation with the contrast of insertion or tabular and go out; In view of this, the step of the method for testing of a kind of remaining battery capacitance of storage of the present invention is as follows:
(A) battery is imposed the discharge a bit of time (rough 5 minutes);
(B) measure the terminal voltage V value and the discharge current I value of battery;
(C) utilize the terminal voltage V value of battery to concern in the rough inverse ratio F that is scheduled to of one-tenth of this away minor segment discharge process, utilize this inverse relation F to try to achieve discharge rate K with discharge rate K;
(D) again this discharge rate K be multiply by the discharge current I that records, get final product residue capacitance of storage C.
The method that this is above-mentioned, the residue capacitance of storage of gained are to be a simple numeral, and in other words, this method is that the capacitance of storage with battery gives datumization; And the test duration is extremely short, with the traditional experiment method in only detecting than difference battery for a long time, and need to judge the indeterminate property of the mode of curve with naked eyes, completely different, again through actual execution result, for checking its accuracy, after recording the residue capacitance of storage value of data, after comparing discharge time with the conventional batteries capacitance of storage, its accuracy can be up to about 75%-95% again, as revising with temperature or other factors, accuracy rate will can be lifting again.
About advantage of the present invention:
(1) the present invention remain that capacitance of storage all can be clear and definite with datumization, though the degree of accuracy does not reach Absolutely, but still can whether give deterioration of battery to the tester with the data supply of little error Judge; And do not have that traditional detection person judges numerous curvilinear motions with naked eyes and easily produce and obscure.
(2) testing time of the present invention extremely short, and quick benefit is arranged, can reduce the time in a large number Reach the cost consumption of electric power, manpower.
To sum up institute is old, and the method for testing of a kind of remaining battery capacitance of storage of the present invention is to be one domestic New invention on the outer cells known method of testing, and have industrial value, and conform to the new of patent Newness, creativeness and practicality, special proposition patent application.
Claims (4)
1. the method for testing of a remaining battery capacitance of storage, it is characterized in that, be that battery is imposed a bit of time of discharge, measure battery terminal voltage value and discharge current value simultaneously, and utilize battery terminal voltage and discharge rate between this section, to have the proportionality constant of an inverse ratio, then try to achieve discharge rate, again this discharge rate be multiply by discharge current, get final product the residue capacitance of storage.
2. by the method for testing of the described a kind of remaining battery capacitance of storage of claim 1, it is characterized in that: wherein the inverse ratio proportionality constant of this section can be tried to achieve discharge rate divided by the terminal voltage value.
3. by the method for testing of the described a kind of remaining battery capacitance of storage of claim 1, it is characterized in that: wherein the terminal voltage value is to utilize the relation of inverse ratio, contrasts discharge rate with insertion.
4. by the method for testing of the described a kind of remaining battery capacitance of storage of claim 1, it is characterized in that: wherein the terminal voltage value is to utilize the relation of inverse ratio, contrasts discharge rate with diagram method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97116916 CN1212373A (en) | 1997-09-19 | 1997-09-19 | Method for detecting residual capacitance of storage battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97116916 CN1212373A (en) | 1997-09-19 | 1997-09-19 | Method for detecting residual capacitance of storage battery |
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| CN1212373A true CN1212373A (en) | 1999-03-31 |
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| CN 97116916 Pending CN1212373A (en) | 1997-09-19 | 1997-09-19 | Method for detecting residual capacitance of storage battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100437135C (en) * | 2002-11-15 | 2008-11-26 | 索尼株式会社 | Battery capacity calculating method, battery capacity calculating apparatus, and battery capacity calculating program |
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1997
- 1997-09-19 CN CN 97116916 patent/CN1212373A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100437135C (en) * | 2002-11-15 | 2008-11-26 | 索尼株式会社 | Battery capacity calculating method, battery capacity calculating apparatus, and battery capacity calculating program |
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