CN105425168A - Storage battery capacity detection method and apparatus in power supply system - Google Patents
Storage battery capacity detection method and apparatus in power supply system Download PDFInfo
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- CN105425168A CN105425168A CN201610012821.6A CN201610012821A CN105425168A CN 105425168 A CN105425168 A CN 105425168A CN 201610012821 A CN201610012821 A CN 201610012821A CN 105425168 A CN105425168 A CN 105425168A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/387—Determining ampere-hour charge capacity or SoC
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Abstract
The invention provides a storage battery capacity detection method and apparatus in a power supply system. The method comprises the following steps: charging a storage battery needing to be detected; determining whether the storage battery is at a constant-voltage floating charge state, if so, stopping charging the storage battery, controlling the storage battery to perform checking discharge through expected currents, and performing sampling and integration on real discharge currents of the storage battery; when the storage battery performs the checking discharge, determining the size of discharge voltages of the storage battery, and when the discharge voltages of the storage battery are reduced to termination voltages, stopping discharging the storage battery; and calculating a capacity value of the storage battery according to a formula shown in the descriptions, wherein Q is the capacity value of the storage battery, T is the duration when the storage battery performs the checking discharge, and I is the expected currents. According to the invention, through performing the sampling and integration on the discharge currents in a discharge process, the capacity value of the storage battery, obtained through calculation by use of the method disclosed by the embodiment of the invention is closer to the real capacity value of the storage battery, and thus the accuracy is quite high.
Description
Technical field
The present invention relates to substation equipment DC power-supply system technical field, is specifically related to accumulator core in a kind of electric power system and holds detection method and device.
Background technology
In the electric power system of electric battery parallel connection, by the working environment of electric battery, access times, service time, the impact such as temperature field and self-discharge performance, the capacity utilization efficiency of the accumulator in electric battery can obviously reduce, in order to ensure the security of powering, need the capacity utilization ensureing described accumulator can not be too low, therefore, accumulator in electric power system in new electric battery of installing should carry out the full capacity property checked charge-discharge test when checking and accepting, within every 2 ~ 3 years later, 1 the full capacity property checked charge-discharge test should be carried out, run later valve-control storage battery experiment in 6 years, 1 the full capacity property checked charge-discharge test should be carried out every year, the capacity utilization efficiency of described accumulator is determined by the described full capacity property checked charge-discharge test.
The described full capacity property checked charge-discharge test core holds described accumulator is determined in test capacity by calculation of capacity formula: C=If × t (Ah), wherein, described C is the capacity of accumulator, unit is Ah (ampere-hour), described If is the discharge current of accumulator, unit is A (ampere), and t is discharge time, and unit is h (hour).
In traditional computation process, the discharge current If of described accumulator is defaulted as a steady state value, but in actual discharge process, its size can change by the impact of various factors, therefore causes the accumulator capacity precision that calculates low.
Summary of the invention
In view of this, the embodiment of the present invention provides accumulator core in a kind of electric power system to hold detection method and device, to solve in prior art, and the problem that degree of accuracy is low when calculating accumulator capacity.
For achieving the above object, the embodiment of the present invention provides following technical scheme:
In a kind of electric power system, accumulator core holds detection method, comprising:
The accumulator of required detection is charged;
Judge whether described accumulator is in constant voltage floating charge state, if so, stop charging to described accumulator, control described accumulator to expect that electric current carries out the property checked electric discharge, the true discharge current of described accumulator is sampled and integration;
When to the described accumulator property checked electric discharge, judge the sparking voltage size of described accumulator, when the sparking voltage of described accumulator is reduced to final voltage, stop discharging to described accumulator;
According to formula
calculate the capability value of described accumulator, wherein, described Q is the capability value of described accumulator, and T accumulator carries out the duration of the property checked electric discharge, and I is described expectation electric current.
Preferably, in above-mentioned electric power system, accumulator core holds in detection method, and the described accumulator of described control, to expect that electric current carries out the property checked electric discharge, comprising:
Control described accumulator and carry out the property checked electric discharge with the discharge current of 0.7A.
Preferably, in above-mentioned electric power system, accumulator core holds in detection method, and the described true discharge current to described accumulator is sampled and integration, comprising:
Every prefixed time interval, the real current of described accumulator is once sampled and integration.
Preferably, in above-mentioned electric power system, accumulator core holds in detection method, when foundation formula
after calculating the capability value of described accumulator, also comprise:
Judging whether the capability value of described accumulator is greater than preset value, if so, exporting for characterizing the normal information of described accumulator, otherwise export the information for characterizing described accumulator failure.
Preferably, in above-mentioned electric power system, accumulator core holds in detection method, when foundation formula
after calculating the capability value of described accumulator, also comprise:
Judge whether the number m of the capability value of described accumulator altogether calculated equals preset value n, if not, charges to the accumulator of required detection, described n be not less than 2 positive integer;
Judge whether the average of the capability value of n the described accumulator calculated is greater than preset value, if so, exports for characterizing the normal information of described accumulator, otherwise export the information for characterizing described accumulator failure.
In a kind of electric power system, accumulator core holds pick-up unit, comprising:
Charging module, charges to the accumulator of required detection after getting charging instruction, gets after stopping charging instruction, stops charging to described accumulator;
Discharge module, for judging whether described accumulator is in constant voltage floating charge state, if, export to described charging module and stop charging instruction, control described accumulator to expect that electric current carries out the property checked electric discharge, the true discharge current of described accumulator is sampled and integration, stops discharging to described accumulator after getting stopping electric discharge instruction;
Battery tension judge module, for when to the described accumulator property checked electric discharge, judges the sparking voltage size of described accumulator, when the sparking voltage of described accumulator is reduced to final voltage, exports stop electric discharge instruction to described discharge module;
Calculation of capacity module, for after described discharge module stopping is discharged to described accumulator, according to formula
calculate the capability value of described accumulator, wherein, described Q is the capability value of described accumulator, and T accumulator carries out the duration of the property checked electric discharge, and I is described expectation electric current.
Preferably, in above-mentioned electric power system, accumulator core holds in pick-up unit, and described discharge module, comprising:
Expect current adjusting module, for regulating the size of described expectation electric current according to user input instruction.
Preferably, in above-mentioned electric power system, accumulator core holds in pick-up unit, and described discharge module, comprising:
Judge module, electric discharge submodule and sampling integration module;
Described judgement submodule, for judging whether described accumulator is in constant voltage floating charge state, if so, after exporting stopping charging instruction, exports discharge control signal to described electric discharge submodule to described charging module;
Described electric discharge submodule, controls described accumulator to expect that electric current carries out the property checked electric discharge, stops discharging to described accumulator after getting the stopping electric discharge instruction of described battery tension judge module output after getting described discharge control signal;
Described sampling integration module, for when to the described accumulator property checked electric discharge, once samples and integration to the real current of described accumulator every prefixed time interval.
Preferably, in above-mentioned electric power system, accumulator core holds in pick-up unit, also comprises:
First capacity determination module, for obtaining the capability value of the described accumulator that described calculation of capacity module calculates, judge whether the capability value of described accumulator is greater than preset value, if, export for characterizing the normal information of described accumulator, otherwise export the information for characterizing described accumulator failure.
Preferably, in above-mentioned electric power system, accumulator core holds in pick-up unit, and described calculation of capacity module, comprising:
Calculation of capacity submodule, for foundation formula
calculate the capability value of described accumulator;
Number of times judge module, whether the number m for the capability value judging the described accumulator altogether calculated equals preset value n, if not, exports charging instruction to described charging module, described n be not less than 2 positive integer;
Described accumulator core holds pick-up unit and also comprises:
Second capacity determination module, whether the average for the capability value judging n the described accumulator calculated is greater than preset value, if so, export for characterizing the normal information of described accumulator, otherwise export the information for characterizing described accumulator failure.
Based on technique scheme, in the electric power system that the embodiment of the present invention provides, accumulator core holds detection method and device, when discharging to the accumulator property checked, by having carried out sampling and integration to the discharge current in discharge process, therefore adopt the capability value of the described accumulator that method calculates disclosed in the above embodiments of the present application more close to the true capacity value with described accumulator, therefore there is higher precision.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
In Fig. 1 a kind of electric power system disclosed in the embodiment of the present application, accumulator core holds the process flow diagram of detection method;
In Fig. 2 a kind of electric power system disclosed in another embodiment of the application, accumulator core holds the process flow diagram of detection method
In Fig. 3 a kind of electric power system disclosed in the another embodiment of the application, accumulator core holds the process flow diagram of detection method;
The structural representation of accumulator core capacitance device in Fig. 4 a kind of electric power system disclosed in the embodiment of the present application;
The structural representation of accumulator core capacitance device in Fig. 5 a kind of electric power system disclosed in another embodiment of the application.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only 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.
Be directed to the problem that when measuring the capacity of accumulator in prior art, measuring accuracy is low, this application discloses accumulator core in a kind of electric power system and hold detection method and device.
In Fig. 1 electric power system disclosed in the embodiment of the present application, accumulator core holds the schematic flow sheet of detection method, and see Fig. 1, the method comprises:
Step S101: the accumulator of required detection is charged;
Step S102: judge whether described accumulator is in constant voltage floating charge state, if so, performs step S103;
Step S103: stop charging to described accumulator, performs step S104 and S106;
Wherein, it should be noted that, described step S101-103 mainly makes described accumulator meet the property checked discharging condition.Be specially: before to the described accumulator property checked electric discharge, need to judge the charged state of described accumulator, if when it is in constant current voltage limiting charged state, it directly can not carry out the property checked electric discharge, need to continue to charge to described accumulator, when described accumulator is in constant voltage floating charge charging, then think that described accumulator now meets discharging condition, the property checked electric discharge can be carried out;
Step S104: control described accumulator to expect that electric current carries out the property checked electric discharge, perform step S105;
Step S105: the true discharge current of described accumulator is sampled and integration;
In this step, because accumulator is in discharge process, by the impact of discharge environment and self capacity, the discharge current of described accumulator can change in discharge process, therefore, in order to the capacitance that ensures to calculate through determining, in the method, also sampling and integration are carried out to the discharge current in described battery discharging process, to guarantee that the discharge current used when calculating described accumulator capacity is more close to the true discharge current of described accumulator, thus improve the precision of the capacity of the accumulator finally calculated;
Step S106: the sparking voltage size judging described accumulator, when the sparking voltage of described accumulator is reduced to final voltage, stops discharging to described accumulator, performs step S107;
In this step, carry out in the process of the property checked electric discharge at described accumulator, the sparking voltage of described accumulator progressively diminishes, when its sparking voltage reaches final voltage, just be difficult to effectively discharge, therefore need the magnitude of voltage at accumulator two ends described in Real-Time Monitoring in this process, when the sparking voltage of described accumulator reaches described final voltage, stop discharging to Sohu of Soviet Union accumulator;
Step S107: according to formula
(formula 1) calculates the capability value of described accumulator, and wherein, described Q is the capability value of described accumulator, and T accumulator carries out the duration of the property checked electric discharge, and I is described expectation electric current.
See method disclosed in the above embodiments of the present application, owing to having carried out sampling and integration to the discharge current in discharge process, therefore adopt the capability value of the described accumulator that method calculates disclosed in the above embodiments of the present application more close to the true capacity value with described accumulator, therefore there is higher precision.
Be understandable that, in method disclosed in the above embodiments of the present application, the expectation electric current of described electric discharge tank discharge can measure according to user's self-demand, and preferably, described expectation electric current can be 0.1C
10(0.7A), that is, described step S104 is specifically as follows: control described accumulator and carry out the property checked electric discharge with the discharge current of 0.7A.
Be understandable that, in technical scheme disclosed in the above embodiments of the present application, if sampled and integration to the discharge current of described accumulator in real time, so, need in this process to carry out a large amount of data operations, processor is needed to have very high processing speed, equipment cost can be caused to increase, to this on the basis that the precision that can both provide needed for user is provided, the application can arrange a pair battery discharging electric current and carry out sampling and time interval of integration, concrete, in method disclosed in the above embodiments of the present application, described step S105 is specifically as follows: once sample and integration to the real current of described accumulator every prefixed time interval.Wherein, described prefixed time interval can according to the demand sets itself of user to precision, and preferably, in technical scheme disclosed in the above embodiments of the present application, described prefixed time interval can be 0.1 hour.
Be understandable that, after disclosed in employing the above embodiments of the present application, method calculates the battery capacity of described accumulator, whether the application also can meet the demands to described accumulator judges, that is, see Fig. 2, after described step S107, can also comprise:
Step S1081: judge whether the capability value of described accumulator is greater than preset value, if so, shows that described accumulator is normal, performs step S1091, otherwise, show that described accumulator breaks down, cannot continue to use, perform step S1092;
Wherein, preset value can be selected according to user's self-demand, and preferably, described preset value can be 0.85*X, and wherein, described X is the nominal capacity of tested accumulator;
Step S1091: export for characterizing the normal information of described accumulator;
Step S1092: otherwise the information exported for characterizing described accumulator failure.
Be understandable that, in said method, if whether the capability value only according to one group of described accumulator calculated normally judges described accumulator, be difficult to the accuracy ensureing to judge, such as, described accumulator is under the state do not activated completely, the capability value of first group of described accumulator recorded is less, be easy to cause the capability value of described accumulator to be less than described preset value, and then miscue is made to user, be directed to this, disclosed herein as well is another and judge the whether normal method of described accumulator, see Fig. 3, after described step S107, the method specifically can comprise:
Step S1082: judge whether the number m of the capability value of described accumulator altogether calculated equals preset value n, if not, performs step S101, if so, perform step S1093, described n be not less than 2 positive integer;
Step S1083: the mean value calculating the capacity of a described n accumulator, performs step S110;
Step S1084: judge whether the mean value of the capacity of a described n accumulator is greater than preset value, if so, performs step S1091, otherwise performs step S1092;
Step S1091: export for characterizing the normal information of described accumulator;
Step S1092: export the information for characterizing described accumulator failure.
Be understandable that, corresponding with said method, disclosed herein as well is accumulator core in a kind of electric power system and hold pick-up unit, both can use for reference mutually, and see 4, this device can comprise:
Charging module 10, discharge module 20, battery tension judge module 30 and calculation of capacity module 40;
Wherein, described charging module 10, charges to the accumulator of required detection after getting charging instruction, gets after stopping charging instruction, stops charging to described accumulator; Wherein, described charging instruction and stop charging instruction can be also can being sent by other modules of manually being inputted by user;
Described discharge module 20, for when adopting described charging module 10 pairs of accumulators to charge, judge whether described accumulator is in constant voltage floating charge state, if, export to described charging module 10 and stop charging instruction, and control described accumulator to expect that electric current carries out the property checked electric discharge, when described accumulator carries out the property checked electric discharge, the true discharge current of described accumulator is sampled and integration, stop discharging to described accumulator after getting stopping electric discharge instruction, wherein, described stopping electric discharge instruction equally also can be that user inputs or be obtained by other modules,
Described battery tension judge module 30, for when to the described accumulator property checked electric discharge, judge the sparking voltage size of described accumulator, when the sparking voltage of described accumulator is reduced to final voltage, export to described discharge module 20 and stop electric discharge instruction, send trigger pip to described calculation of capacity module 40;
Described calculation of capacity module 40, for after getting the trigger pip that described battery tension judge module 30 sends (described discharge module 20 stops discharging to described accumulator), the sampling carried out described accumulator according to described discharge module 20 and integration, adopt formula
calculate the capability value of described accumulator, wherein, described Q is the capability value of described accumulator, and T accumulator carries out the duration of the property checked electric discharge, and I is described expectation electric current.
Wherein, the sampling that described discharge module 20 carries out described accumulator and integration can be sent to described calculation of capacity module 40 immediately, also can work as unifiedly after stopping discharging to described accumulator to be sent to described calculation of capacity module 40.
Be understandable that, corresponding with said method, in said apparatus, described discharge module 20, can comprise:
Expect current adjusting module, for regulating the size of described expectation electric current according to user input instruction, wherein, described expectation electric current can be 0.7A.
Be understandable that, corresponding with said method, see Fig. 5, described discharge module 20, can comprise:
Judge module 21, electric discharge submodule 22 and sampling integration module 23;
Described judgement submodule 21, for judging whether described accumulator is in constant voltage floating charge state, if so, after exporting stopping charging instruction, exports discharge control signal to described electric discharge submodule 22 to described charging module 10;
Described electric discharge submodule 22, after getting described discharge control signal, control described accumulator to expect that electric current carries out the property checked electric discharge, stop discharging to described accumulator after getting the stopping electric discharge instruction of described battery tension judge module 30 output;
Described sampling integration module 23, for when to the described accumulator property checked electric discharge, once samples and integration to the real current of described accumulator every prefixed time interval.
Corresponding with said method, in device disclosed in the above embodiments of the present application, can also comprise:
First capacity determination module, for obtaining the capability value of the described accumulator that described calculation of capacity module calculates, judge whether the capability value of described accumulator is greater than preset value, if, export for characterizing the normal information of described accumulator, otherwise export the information for characterizing described accumulator failure.
Corresponding with above-mentioned amplification, see Fig. 5, described calculation of capacity module 40, can comprise:
Calculation of capacity submodule 41, for foundation formula
calculate the capability value of described accumulator;
Number of times judge module 42, whether the number m for the capability value judging the described accumulator altogether calculated equals preset value n, if not, exports charging instruction to described charging module, described n be not less than 2 positive integer;
Described accumulator core holds pick-up unit and also comprises:
Second capacity determination module 50, whether the average for the capability value judging n the described accumulator calculated is greater than preset value, if so, export for characterizing the normal information of described accumulator, otherwise export the information for characterizing described accumulator failure.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For device disclosed in embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates see method part.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. in electric power system, accumulator core holds a detection method, it is characterized in that, comprising:
The accumulator of required detection is charged;
Judge whether described accumulator is in constant voltage floating charge state, if so, stop charging to described accumulator, control described accumulator to expect that electric current carries out the property checked electric discharge, the true discharge current of described accumulator is sampled and integration;
When to the described accumulator property checked electric discharge, judge the sparking voltage size of described accumulator, when the sparking voltage of described accumulator is reduced to final voltage, stop discharging to described accumulator;
According to formula
calculate the capability value of described accumulator, wherein, described Q is the capability value of described accumulator, and T accumulator carries out the duration of the property checked electric discharge, and I is described expectation electric current.
2. in electric power system according to claim 1, accumulator core holds detection method, it is characterized in that, the described accumulator of described control, to expect that electric current carries out the property checked electric discharge, comprising:
Control described accumulator and carry out the property checked electric discharge with the discharge current of 0.7A.
3. in electric power system according to claim 1, accumulator core holds detection method, and it is characterized in that, the described true discharge current to described accumulator is sampled and integration, comprising:
Every prefixed time interval, the real current of described accumulator is once sampled and integration.
4. in electric power system according to claim 1, accumulator core holds detection method, it is characterized in that, when foundation formula
after calculating the capability value of described accumulator, also comprise:
Judging whether the capability value of described accumulator is greater than preset value, if so, exporting for characterizing the normal information of described accumulator, otherwise export the information for characterizing described accumulator failure.
5. in electric power system according to claim 1, accumulator core holds detection method, it is characterized in that, when foundation formula
after calculating the capability value of described accumulator, also comprise:
Judge whether the number m of the capability value of described accumulator altogether calculated equals preset value n, if not, charges to the accumulator of required detection, described n be not less than 2 positive integer;
Judge whether the average of the capability value of n the described accumulator calculated is greater than preset value, if so, exports for characterizing the normal information of described accumulator, otherwise export the information for characterizing described accumulator failure.
6. in electric power system, accumulator core holds a pick-up unit, it is characterized in that, comprising:
Charging module, charges to the accumulator of required detection after getting charging instruction, gets after stopping charging instruction, stops charging to described accumulator;
Discharge module, for judging whether described accumulator is in constant voltage floating charge state, if, export to described charging module and stop charging instruction, control described accumulator to expect that electric current carries out the property checked electric discharge, the true discharge current of described accumulator is sampled and integration, stops discharging to described accumulator after getting stopping electric discharge instruction;
Battery tension judge module, for when to the described accumulator property checked electric discharge, judges the sparking voltage size of described accumulator, when the sparking voltage of described accumulator is reduced to final voltage, exports stop electric discharge instruction to described discharge module;
Calculation of capacity module, for after described discharge module stopping is discharged to described accumulator, according to formula
calculate the capability value of described accumulator, wherein, described Q is the capability value of described accumulator, and T accumulator carries out the duration of the property checked electric discharge, and I is described expectation electric current.
7. in electric power system according to claim 6, accumulator core holds pick-up unit, and it is characterized in that, described discharge module, comprising:
Expect current adjusting module, for regulating the size of described expectation electric current according to user input instruction.
8. in electric power system according to claim 6, accumulator core holds pick-up unit, and it is characterized in that, described discharge module, comprising:
Judge module, electric discharge submodule and sampling integration module;
Described judgement submodule, for judging whether described accumulator is in constant voltage floating charge state, if so, after exporting stopping charging instruction, exports discharge control signal to described electric discharge submodule to described charging module;
Described electric discharge submodule, controls described accumulator to expect that electric current carries out the property checked electric discharge, stops discharging to described accumulator after getting the stopping electric discharge instruction of described battery tension judge module output after getting described discharge control signal;
Described sampling integration module, for when to the described accumulator property checked electric discharge, once samples and integration to the real current of described accumulator every prefixed time interval.
9. in electric power system according to claim 6, accumulator core holds pick-up unit, it is characterized in that, also comprises:
First capacity determination module, for obtaining the capability value of the described accumulator that described calculation of capacity module calculates, judge whether the capability value of described accumulator is greater than preset value, if, export for characterizing the normal information of described accumulator, otherwise export the information for characterizing described accumulator failure.
10. in electric power system according to claim 6, accumulator core holds pick-up unit, and it is characterized in that, described calculation of capacity module, comprising:
Calculation of capacity submodule, for foundation formula
calculate the capability value of described accumulator;
Number of times judge module, whether the number m for the capability value judging the described accumulator altogether calculated equals preset value n, if not, exports charging instruction to described charging module, described n be not less than 2 positive integer;
Described accumulator core holds pick-up unit and also comprises:
Second capacity determination module, whether the average for the capability value judging n the described accumulator calculated is greater than preset value, if so, export for characterizing the normal information of described accumulator, otherwise export the information for characterizing described accumulator failure.
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