CN106546921A - The battery capacity update method of accumulator and device - Google Patents
The battery capacity update method of accumulator and device Download PDFInfo
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- CN106546921A CN106546921A CN201510601476.5A CN201510601476A CN106546921A CN 106546921 A CN106546921 A CN 106546921A CN 201510601476 A CN201510601476 A CN 201510601476A CN 106546921 A CN106546921 A CN 106546921A
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Abstract
The invention discloses a kind of battery capacity update method of accumulator, including：At the end of battery discharging to be monitored, discharge voltage is obtained；When the discharge voltage of acquisition is less than predetermined threshold value with the difference of default discharge cut-off voltage, discharge capacity of the accumulator to be monitored at the end of electric discharge is obtained；Discharge capacity using the accumulator to be monitored at the end of electric discharge updates the battery capacity of the accumulator to be monitored.The invention also discloses a kind of battery capacity updating device of accumulator.Present invention achieves its battery capacity upgrades in time after the battery discharging to be monitored, may then pass through the battery capacity before updating and the discharge capacity calculates residual capacity, so that the monitoring process of residual capacity is unrelated with the health degree of accumulator to be monitored, and then cause the monitoring of remaining battery capacity to be monitored more accurate, improve the accuracy rate of remaining battery capacity monitoring to be monitored.
Description
Technical field
The present invention relates to battery technology field, more particularly to a kind of battery capacity update method and device of accumulator.
Background technology
Accumulator is widely used in all trades and professions, typically multiple accumulator batteries can be used as back-up source electric power system, the Emergency use when main power source breaks down, it is ensured that the non-stop run of communication equipment into accumulator battery.Therefore the residual capacity monitoring of accumulator is the essential condition for ensureing straight-flow system safe operation, and the reliability to ensureing whole communication system, tool have very great significance.
The residual capacity of accumulator and the charging and discharging currents of accumulator have a great relation, and with stronger non-linear, it is difficult to accomplish accurately estimation.At present, the method for estimation on line remaining battery capacity includes using ampere-hour integration method and battery dump energy value mpdal/analysis, is estimated using the difference between accumulator capacity and discharge capacity.
The method of existing estimation on line remaining battery capacity is all based on the premise that accumulator health degree is 100%, but, with the operation and use of accumulator, the health degree of accumulator occurs a certain degree of decline, battery capacity of accumulator when fully charged is caused to be less than its rated capacity, the estimation generation system error of remaining battery capacity is in turn resulted in, causes the inaccurate of remaining battery capacity estimation.
The content of the invention
The present invention provides a kind of battery capacity update method and device of accumulator, it is intended to solve existing based on the inaccurate technical problem of remaining battery capacity estimation.
For achieving the above object, the battery capacity update method of a kind of accumulator that the present invention is provided, the battery capacity update method of the accumulator are comprised the following steps：
At the end of battery discharging to be monitored, discharge voltage is obtained；
When the discharge voltage of acquisition is less than predetermined threshold value with the difference of default discharge cut-off voltage, discharge capacity of the accumulator to be monitored at the end of electric discharge is obtained；
Discharge capacity using the accumulator to be monitored at the end of electric discharge updates the battery capacity of the accumulator to be monitored.
Preferably, it is described at the end of battery discharging to be monitored, obtain electric discharge at the end of discharge voltage the step of after, methods described also includes：
When the difference of the discharge voltage and default discharge cut-off voltage is more than predetermined threshold value, determine the discharge voltage whether less than default discharge cut-off voltage；
When the discharge voltage is less than default discharge cut-off voltage, the discharge capacity of accumulator to be monitored when discharge voltage is equal to default discharge cut-off voltage is obtained；
When being equal to default discharge cut-off voltage using the discharge voltage, the discharge capacity of accumulator to be monitored updates the battery capacity of the accumulator to be monitored.
Preferably, it is described at the end of battery discharging to be monitored, the step of obtain discharge voltage before, the battery capacity update method of the accumulator also includes step：
During discharge operation being carried out to the accumulator to be monitored, detect the discharge current of accumulator to be monitored every the first prefixed time interval；
When discharge current is detected every time, the first discharge capacity in current time interval is obtained according to the discharge current for detecting, and calculated first discharge capacity and present discharge amount are overlapped into the second discharge capacity of generation；
The present discharge amount is updated using second discharge capacity；
When the difference of the discharge voltage and the default discharge cut-off voltage for obtaining is less than predetermined threshold value, include the step of obtain discharge capacity of the accumulator to be monitored at the end of electric discharge：
When the difference of the discharge voltage and default discharge cut-off voltage is less than predetermined threshold value, using discharge capacity of the present discharge amount as the accumulator to be monitored at the end of electric discharge.
Preferably, after the step of updating the present discharge amount using second discharge capacity, methods described also includes：
Present discharge amount is stored to default memory space every the second prefixed time interval.
Preferably, at the end of battery discharging to be monitored, obtain discharge voltage the step of include：
At the end of battery discharging to be monitored, determine whether the accumulator to be monitored carries out discharge operation under fully charged state；
When the accumulator to be monitored carries out discharge operation under fully charged state, discharge voltage is obtained.
Additionally, for achieving the above object, the present invention also provides a kind of battery capacity updating device of accumulator, and the battery capacity updating device of the accumulator includes：
Voltage detection module, for, at the end of battery discharging to be monitored, obtaining discharge voltage；
First acquisition module, when being less than predetermined threshold value for the difference in the discharge voltage and the default discharge cut-off voltage for obtaining, obtains discharge capacity of the accumulator to be monitored at the end of electric discharge；
First update module, updates the battery capacity of the accumulator to be monitored for the discharge capacity using the accumulator to be monitored at the end of electric discharge.
Preferably, the battery capacity updating device of the accumulator also includes：
Whether determining module, when being more than predetermined threshold value for the difference in the discharge voltage and default discharge cut-off voltage, determine the discharge voltage less than default discharge cut-off voltage；
Second acquisition module, for when the discharge voltage is less than default discharge cut-off voltage, obtaining the discharge capacity of accumulator to be monitored when discharge voltage is equal to default discharge cut-off voltage；
Second update module, during for being equal to default discharge cut-off voltage using the discharge voltage, the discharge capacity of accumulator to be monitored updates the battery capacity of the accumulator to be monitored.
Preferably, the battery capacity updating device of the accumulator also includes：
Current detection module, for when discharge operation is carried out to the accumulator to be monitored, detecting the discharge current of accumulator to be monitored every the first prefixed time interval；
3rd acquisition module, for when discharge current is detected every time, obtaining the first discharge capacity in current time interval according to the discharge current for detecting, and calculated first discharge capacity and present discharge amount being overlapped the second discharge capacity of generation；
3rd update module, for updating the present discharge amount using second discharge capacity；
First acquisition module is additionally operable to when the difference of the discharge voltage and default discharge cut-off voltage is less than predetermined threshold value, using discharge capacity of the present discharge amount as the accumulator to be monitored at the end of electric discharge.
Preferably, the battery capacity updating device of the accumulator also includes：
Memory module, for present discharge amount being stored to default memory space every the second prefixed time interval.
Preferably, the voltage detection module includes：
Determining unit, at the end of battery discharging to be monitored, determining whether the accumulator to be monitored carries out discharge operation under fully charged state；
Voltage detection unit, for when the accumulator to be monitored carries out discharge operation under fully charged state, obtaining discharge voltage.
The present invention is by the end of battery discharging to be monitored, obtain discharge voltage, then when the difference of discharge voltage and default discharge cut-off voltage is less than predetermined threshold value, obtain discharge capacity of the accumulator to be monitored at the end of electric discharge, then the battery capacity of accumulator to be monitored is updated using the discharge capacity, realize upgrading in time for after battery discharging to be monitored its battery capacity, may then pass through the battery capacity before updating and the discharge capacity calculates residual capacity, so that the monitoring process of residual capacity is unrelated with the health degree of accumulator to be monitored, and then cause the monitoring of remaining battery capacity to be monitored more accurate, improve the accuracy rate of remaining battery capacity monitoring to be monitored.
Description of the drawings
Fig. 1 is the schematic flow sheet of the battery capacity update method first embodiment of accumulator of the present invention；
Fig. 2 is the schematic flow sheet of the battery capacity update method second embodiment of accumulator of the present invention；
Fig. 3 is the schematic flow sheet of the battery capacity update method 3rd embodiment of accumulator of the present invention；
Fig. 4 is the schematic flow sheet of the battery capacity update method fourth embodiment of accumulator of the present invention；
Fig. 5 is the refinement schematic flow sheet of the step of present invention obtains discharge voltage；
Fig. 6 is the high-level schematic functional block diagram of the battery capacity updating device first embodiment of accumulator of the present invention；
Fig. 7 is the high-level schematic functional block diagram of the battery capacity updating device second embodiment of accumulator of the present invention；
Fig. 8 is the high-level schematic functional block diagram of the battery capacity updating device 3rd embodiment of accumulator of the present invention；
Fig. 9 is the high-level schematic functional block diagram of the battery capacity updating device fourth embodiment of accumulator of the present invention；
Figure 10 is the refinement high-level schematic functional block diagram of voltage detection module in Fig. 6.
The realization of the object of the invention, functional characteristics and advantage will be described further in conjunction with the embodiments referring to the drawings.
Specific embodiment
It should be appreciated that specific embodiment described herein is not intended to limit the present invention only to explain the present invention.
The present invention provides a kind of battery capacity update method of accumulator.
With reference to Fig. 1, Fig. 1 is the schematic flow sheet of the battery capacity update method first embodiment of accumulator of the present invention.
In the present embodiment, the battery capacity update method of the accumulator includes：
Step S10, at the end of battery discharging to be monitored, obtains discharge voltage；
In the present embodiment, can pass through accumulator voltage detecting circuit etc. carries out the discharge voltage at the end of detection obtains battery discharging to be monitored.
Step S20, when the difference of the discharge voltage for getting and default discharge cut-off voltage is less than predetermined threshold value, obtains discharge capacity of the accumulator to be monitored at the end of electric discharge；
In the present embodiment, by during discharge operation is carried out to accumulator to be monitored, the discharge current of accumulator to be monitored is detected every the first prefixed time interval, then the first discharge capacity in current time interval is obtained according to the discharge current for detecting, wherein, first prefixed time intervals of discharge current * of the first discharge capacity=current time interval；Then, calculated first discharge capacity and present discharge amount are overlapped into the second discharge capacity of generation, at the end of battery discharging to be monitored, superposition generates the second discharge capacity and is the discharge capacity of the accumulator to be monitored at the end of electric discharge.It is easy to understand, present discharge amount when the battery discharging to be monitored starts is zero, therefore, the first discharge capacity got every the first prefixed time interval can also be stored, then, at the end of battery discharging to be monitored, all first discharge capacities to storing are overlapped.
The absolute value of the error of discharge voltage when above-mentioned predetermined threshold value refers to the battery discharging to be monitored.
Step S30, the discharge capacity based on the accumulator to be monitored at the end of electric discharge update the battery capacity of the accumulator to be monitored.
The battery capacity of accumulator to be monitored is replaced with into the discharge capacity of the accumulator to be monitored at the end of electric discharge, wherein, battery capacity refers to that the maximum of accumulator to be monitored accumulator under fully charged state can discharge electricity amount.
In the present embodiment, the residual capacity of accumulator to be monitored can be calculated according to the battery capacity of accumulator to be monitored before updating and discharge capacity and be obtained, wherein, the residual capacity of accumulator to be monitored refers to the electricity stored at present by accumulator to be monitored, and its computing formula is：Battery capacity-discharge capacity before residual capacity=renewal.
After the electric discharge each time of accumulator to be monitored, its battery capacity can be automatically updated, the residual capacity of accumulator to be monitored is calculated by the battery capacity and discharge capacity so that the calculating of residual capacity is unrelated with the health degree of accumulator to be monitored, hence in so that the monitoring of residual capacity is more accurate.
The present embodiment is by the end of battery discharging to be monitored, obtain discharge voltage, then when the difference of discharge voltage and default discharge cut-off voltage is less than predetermined threshold value, obtain discharge capacity of the accumulator to be monitored at the end of electric discharge, then the battery capacity of accumulator to be monitored is updated using the discharge capacity, realize upgrading in time for after battery discharging to be monitored its battery capacity, may then pass through the battery capacity before updating and the discharge capacity calculates residual capacity, so that the monitoring process of residual capacity is unrelated with the health degree of accumulator to be monitored, and then cause the monitoring of remaining battery capacity to be monitored more accurate, improve the accuracy rate of remaining battery capacity monitoring to be monitored.
With reference to Fig. 2, Fig. 2 is the schematic flow sheet of the battery capacity update method second embodiment of accumulator of the present invention.
The second embodiment of the battery capacity update method of accumulator of the present invention is proposed based on first embodiment, in the present embodiment, after step slo, the battery capacity update method of the accumulator also includes：
Whether step S40, when the difference of the discharge voltage and default discharge cut-off voltage is more than predetermined threshold value, determine the discharge voltage less than default discharge cut-off voltage；
Wherein, preset discharge cut-off voltage to be configured according to the performance of accumulator to be monitored.
Step S50, when the discharge voltage is less than default discharge cut-off voltage, obtains the discharge capacity of accumulator to be monitored when discharge voltage is equal to default discharge cut-off voltage；
When discharge voltage is less than default discharge cut-off voltage, obtain the discharge capacity of accumulator to be monitored when discharge voltage is equal to default discharge cut-off voltage, the acquisition modes of the discharge capacity are similar with first embodiment, i.e. during discharge operation is carried out to accumulator to be monitored, the discharge current of accumulator to be monitored is detected every the first prefixed time interval, then the first discharge capacity in current time interval is obtained according to the discharge current for detecting, wherein, first prefixed time intervals of discharge current * of the first discharge capacity=current time interval；Then, calculated first discharge capacity and present discharge amount are overlapped into the second discharge capacity of generation, then when discharge voltage is equal to default discharge cut-off voltage, superposition the second discharge capacity of generation is used as discharge voltage is equal to the discharge capacity of accumulator to be monitored during default discharge cut-off voltage and stores standby, certainly, if discharge voltage is equal to the time of default discharge cut-off voltage in a certain first prefixed time interval, then calculate first prefixed time interval to start to discharge voltage to be equal to discharge capacity when presetting discharge cut-off voltage, and the discharge capacity that accumulator to be monitored when discharge voltage is equal to default discharge cut-off voltage is obtained is overlapped with present discharge amount.
Step S60, when being equal to default discharge cut-off voltage using the discharge voltage, the discharge capacity of accumulator to be monitored updates the battery capacity of the accumulator to be monitored.
The battery capacity of accumulator to be monitored is replaced with into the discharge capacity of the accumulator to be monitored accumulator to be monitored when discharge voltage is equal to default discharge cut-off voltage.
Whether the present embodiment is by when difference is more than predetermined threshold value, determining discharge voltage less than default discharge cut-off voltage；Then when discharge voltage is less than default discharge cut-off voltage, obtain the discharge capacity of accumulator to be monitored when discharge voltage is equal to default discharge cut-off voltage, then the battery capacity of accumulator to be monitored is updated using the discharge capacity, realize discharge voltage not in predetermined voltage range when storage battery tankage to be monitored renewal, improve the accuracy rate of remaining battery capacity to be monitored monitoring.
With reference to Fig. 3, Fig. 3 is the schematic flow sheet of the battery capacity update method 3rd embodiment of accumulator of the present invention.
The 3rd embodiment of the battery capacity update method of accumulator of the present invention is proposed based on first embodiment, in the present embodiment, before step S10, the battery capacity update method of the accumulator also includes：
Step S70, when discharge operation is carried out to the accumulator to be monitored, detects the discharge current of accumulator to be monitored every the first prefixed time interval；
In the present embodiment, the discharge current of to be monitored accumulator can be detected by special storage battery current detection circuit or battery-detecting instrument etc. every the first prefixed time interval.
Step S80, when discharge current is detected every time, obtains the first discharge capacity in current time interval according to the discharge current for detecting, and calculated first discharge capacity and present discharge amount is overlapped the second discharge capacity of generation；
When discharge current is detected every time, the discharge capacity in current time interval is obtained according to the discharge current for detecting, wherein, the computing formula of discharge capacity is：First prefixed time intervals of discharge current * of discharge capacity=current time interval；Calculated first discharge capacity and present discharge amount are overlapped into the second discharge capacity of generation.
According to the definition of battery capacity, the discharge capacity C of accumulator is put and with the relation of discharge current is：
Wherein, i is discharge current, and t is the time.
The discrete model of battery capacity is：
Wherein, N obtains the number of times of discharge capacity, and i (nT) is the discharge current of time interval corresponding with discharge capacity, and it is the first prefixed time interval in the sampling period that T is.
In the present embodiment, if the time interval at the end of the time of discharge capacity once being obtained before at the end of electric discharge and being discharged is less than the first prefixed time interval, last time discharge capacity is calculated according to formula (1), wherein, discharge currents of the i for current time interval, t1Time when starting for current time interval, t2Time at the end of for current time interval discharge at the end of time.
For example, in the electric discharge of accumulator to be monitored during a length of three the first prefixed time intervals, assume that the first discharge capacity of each the first prefixed time interval accumulator to be monitored is followed successively by respectively as A, B, C, the second discharge capacity so at the end of second the first prefixed time interval=A+B, the second discharge capacity=A+B+C at the end of the 3rd the first prefixed time interval.
Step S90, updates the present discharge amount using second discharge capacity；
Step S20 includes：When the difference of the discharge voltage and default discharge cut-off voltage is less than predetermined threshold value, using discharge capacity of the present discharge amount as the accumulator to be monitored at the end of electric discharge.
The present embodiment is by during discharge operation is carried out to accumulator to be monitored, the discharge current of accumulator to be monitored is detected every the first prefixed time interval, the first discharge capacity in current time interval is obtained then according to the discharge current for detecting, and calculated first discharge capacity and present discharge amount are overlapped into the second discharge capacity of generation, present discharge amount is updated using the second discharge capacity then；When the last difference in discharge voltage and default discharge cut-off voltage is less than predetermined threshold value, using discharge capacity of the present discharge amount as accumulator to be monitored at the end of electric discharge, the accurate calculating of the discharge capacity at the end of battery discharging to be monitored is realized, the accuracy rate of remaining battery capacity monitoring to be monitored is further increased.
With reference to Fig. 4, Fig. 4 is the schematic flow sheet of the battery capacity update method fourth embodiment of accumulator of the present invention.
The fourth embodiment of the battery capacity update method of accumulator of the present invention is proposed based on a upper embodiment, in the present embodiment, after step S90, the battery capacity update method of the accumulator also includes：
Step S100, stores present discharge amount to default memory space every the second prefixed time interval.
Default memory space can be EEPROM Electrically Erasable Read Only Memories, and then the discharge capacity data for storing in the event of a power failure still are able to holding.Certainly in the present embodiment, can just described present discharge amount be stored in local file, or present discharge amount is stored in data base.In discharge process, present discharge amount was saved in per 5 minutes in a local file, when reconnecting after monitoring system is disconnected, the discharge capacity of last storage can be read from this document, or, in discharge process, the present discharge amount calculated was saved in data base per 5 minutes, so can when monitoring system is reconnected, read from the data base it is all reconnect front unclosed electric discharge recording, while the discharge capacity in record is read out.Continue to calculate discharge capacity after result of calculation when monitoring system acquisition last time exits on the basis of the result of calculation of last time.Integral and calculating when being each refresh current value in monitoring system due to discharge capacity, if so every time refresh current when, all the present discharge amount calculated is preserved, the performance of monitoring system can be reduced.If the preservation moment is separated by longer, and monitoring system has and restarts generation, then the discharge electricity amount value read after restarting has certain error, in practice it has proved that, arrange error of time at intervals when being 5 minutes is preserved in the range of error is allowed, therefore when to arrange the second prefixed time interval be 5 minutes.
The present embodiment is by storing present discharge amount to default memory space every the second prefixed time interval, avoid when on-line monitoring system occurs offline situation, the discharge capacity that on-line monitoring system reconnects front that time is lost, the accuracy rate of remaining battery capacity monitoring to be monitored is further increased.
With reference to Fig. 5, Fig. 5 is the refinement schematic flow sheet of the step of battery capacity update method of accumulator of the present invention obtains discharge voltage.
The refinement flow embodiment of the step of present invention obtains discharge voltage is proposed based on above-described embodiment, in the present embodiment, step S10 includes：
Step S11, at the end of battery discharging to be monitored, determines whether the accumulator to be monitored carries out discharge operation under fully charged state；
State when proceeding by electric discharge according to the accumulator to be monitored determines if discharge operation is carried out under fully charged state.
Step S12, when the accumulator to be monitored carries out discharge operation under fully charged state, obtains discharge voltage.
The present embodiment is by the end of battery discharging to be monitored, determine whether the accumulator to be monitored carries out discharge operation under fully charged state, then when accumulator to be monitored carries out discharge operation under fully charged state, obtain discharge voltage, ensure that the accumulator to be monitored is that discharge operation is carried out under fully charged state and then battery capacity is updated, further increase the accuracy rate of remaining battery capacity monitoring to be monitored.
The present invention further provides a kind of battery capacity updating device of accumulator.
With reference to Fig. 6, Fig. 6 is the high-level schematic functional block diagram of the battery capacity updating device first embodiment of accumulator of the present invention.
In the present embodiment, the battery capacity updating device of the accumulator includes：
Voltage detection module 10, for, at the end of battery discharging to be monitored, obtaining discharge voltage；
In the present embodiment, voltage detection module 10 can pass through accumulator voltage detecting circuit etc. carries out the discharge voltage at the end of detection obtains battery discharging to be monitored.
First acquisition module 20, when being less than predetermined threshold value for the difference in the discharge voltage and the default discharge cut-off voltage for obtaining, obtains discharge capacity of the accumulator to be monitored at the end of electric discharge；
In the present embodiment, by during discharge operation is carried out to accumulator to be monitored, the discharge current of accumulator to be monitored is detected every the first prefixed time interval, then the first discharge capacity in current time interval is obtained according to the discharge current for detecting, wherein, first prefixed time intervals of discharge current * of the first discharge capacity=current time interval；Then, calculated first discharge capacity and present discharge amount are overlapped into the second discharge capacity of generation, at the end of battery discharging to be monitored, superposition generates the second discharge capacity and is the discharge capacity of the accumulator to be monitored at the end of electric discharge.It is easy to understand, present discharge amount when the battery discharging to be monitored starts is zero, therefore, the first discharge capacity got every the first prefixed time interval can also be stored, then, at the end of battery discharging to be monitored, all first discharge capacities to storing are overlapped.
The absolute value of the error of discharge voltage when above-mentioned predetermined threshold value refers to the battery discharging to be monitored.
First update module 30, updates the battery capacity of the accumulator to be monitored for the discharge capacity using the accumulator to be monitored at the end of electric discharge.
The battery capacity of accumulator to be monitored is replaced with the discharge capacity of the accumulator to be monitored at the end of electric discharge by the first update module 30.
In the present embodiment, the residual capacity of accumulator to be monitored can be calculated according to the battery capacity of accumulator to be monitored before updating and discharge capacity and be obtained, wherein, the residual capacity of accumulator to be monitored refers to the electricity stored at present by accumulator to be monitored, and its computing formula is：
Battery capacity-discharge capacity before residual capacity=renewal.
After the electric discharge each time of accumulator to be monitored, its battery capacity can be automatically updated, the residual capacity of accumulator to be monitored is calculated by the battery capacity and discharge capacity so that the calculating of residual capacity is unrelated with the health degree of accumulator to be monitored, hence in so that the monitoring of residual capacity is more accurate.
The present embodiment is by the end of battery discharging to be monitored, voltage detection module 10 obtains discharge voltage, then when the difference of discharge voltage and default discharge cut-off voltage is less than predetermined threshold value, first acquisition module 20 obtains discharge capacity of the accumulator to be monitored at the end of electric discharge, then the first update module 30 updates the battery capacity of accumulator to be monitored using the discharge capacity, realize upgrading in time for after battery discharging to be monitored its battery capacity, may then pass through the battery capacity before updating and the discharge capacity calculates residual capacity, so that the monitoring process of residual capacity is unrelated with the health degree of accumulator to be monitored, and then cause the monitoring of remaining battery capacity to be monitored more accurate, improve the accuracy rate of remaining battery capacity monitoring to be monitored.
With reference to Fig. 7, Fig. 7 is the high-level schematic functional block diagram of the battery capacity updating device second embodiment of accumulator of the present invention.
The second embodiment of the battery capacity updating device of accumulator of the present invention is proposed based on first embodiment, in the present embodiment, the battery capacity updating device of the accumulator also includes：
Whether determining module 40, when being more than predetermined threshold value for the difference in the discharge voltage and default discharge cut-off voltage, determine the discharge voltage less than default discharge cut-off voltage；
Second acquisition module 50, for when the discharge voltage is less than default discharge cut-off voltage, obtaining the discharge capacity of accumulator to be monitored when discharge voltage is equal to default discharge cut-off voltage；
The acquisition modes of the discharge capacity are similar with first embodiment, i.e. during discharge operation is carried out to accumulator to be monitored, the discharge current of accumulator to be monitored is detected every the first prefixed time interval, then the first discharge capacity in current time interval is obtained according to the discharge current for detecting, wherein, first prefixed time intervals of discharge current * of the first discharge capacity=current time interval；Then, calculated first discharge capacity and present discharge amount are overlapped into the second discharge capacity of generation, then when discharge voltage is equal to default discharge cut-off voltage, superposition the second discharge capacity of generation is used as discharge voltage is equal to the discharge capacity of accumulator to be monitored during default discharge cut-off voltage and stores standby, certainly, if discharge voltage is equal to the time of default discharge cut-off voltage in a certain first prefixed time interval, then calculate first prefixed time interval start to discharge voltage be equal to default discharge cut-off voltage when discharge capacity and the discharge capacity that accumulator to be monitored when discharge voltage is equal to default discharge cut-off voltage is obtained is overlapped with present discharge amount.
Second update module 60, during for being equal to default discharge cut-off voltage using the discharge voltage, the discharge capacity of accumulator to be monitored updates the battery capacity of the accumulator to be monitored.
The present embodiment is by when difference is more than predetermined threshold value, whether determining module 40 determines discharge voltage less than default discharge cut-off voltage；Then when discharge voltage is less than default discharge cut-off voltage, second acquisition module 50 obtains the discharge capacity of accumulator to be monitored when discharge voltage is equal to default discharge cut-off voltage, then the second update module 30 updates the battery capacity of accumulator to be monitored using the discharge capacity, realize discharge voltage not in predetermined voltage range when storage battery tankage to be monitored renewal, improve the accuracy rate of remaining battery capacity to be monitored monitoring.
With reference to Fig. 8, Fig. 8 is the high-level schematic functional block diagram of the battery capacity updating device 3rd embodiment of accumulator of the present invention.
The 3rd embodiment of the battery capacity updating device of accumulator of the present invention is proposed based on first embodiment, in the present embodiment, the battery capacity updating device of the accumulator also includes：
Current detection module 70, for when discharge operation is carried out to the accumulator to be monitored, detecting the discharge current of accumulator to be monitored every the first prefixed time interval；
3rd acquisition module 80, for when discharge current is detected every time, obtaining the first discharge capacity in current time interval according to the discharge current for detecting, and calculated first discharge capacity and present discharge amount being overlapped the second discharge capacity of generation；
When discharge current is detected every time, the 3rd acquisition module 70 obtains the discharge capacity in current time interval according to the discharge current for detecting, wherein, the computing formula of discharge capacity is：First prefixed time intervals of discharge current * of discharge capacity=current time interval；Then calculated first discharge capacity and present discharge amount are overlapped the second discharge capacity of generation by the 3rd acquisition module 70.
According to the definition of battery capacity, the discharge capacity C of accumulator is put and with the relation of discharge current is：
Wherein, i is discharge current, and t is the time.
The discrete model of battery capacity is：
Wherein, N obtains the number of times of discharge capacity, and i (nT) is the discharge current of time interval corresponding with discharge capacity, and it is the first prefixed time interval in the sampling period that T is.
In the present embodiment, if the time interval at the end of the time of discharge capacity once being obtained before at the end of electric discharge and being discharged is less than the first prefixed time interval, last time discharge capacity is calculated according to formula (1), wherein, discharge currents of the i for current time interval, t1Time when starting for current time interval, t2Time at the end of for current time interval discharge at the end of time.
3rd update module 90, for updating the present discharge amount using second discharge capacity；
First acquisition module 20 is additionally operable to when the difference of the discharge voltage and default discharge cut-off voltage is less than predetermined threshold value, using discharge capacity of the present discharge amount as the accumulator to be monitored at the end of electric discharge.
The present embodiment is by during discharge operation is carried out to accumulator to be monitored, current detection module 70 detects the discharge current of accumulator to be monitored every the first prefixed time interval, then the 3rd acquisition module 80 obtains the first discharge capacity in current time interval according to the discharge current for detecting, and calculated first discharge capacity and present discharge amount are overlapped into the second discharge capacity of generation, then the 3rd update module 90 updates present discharge amount using the second discharge capacity；When the last difference in discharge voltage and default discharge cut-off voltage is less than predetermined threshold value, discharge capacity of first acquisition module 20 using present discharge amount as accumulator to be monitored at the end of electric discharge, the accurate calculating of the discharge capacity at the end of battery discharging to be monitored is realized, the accuracy rate of remaining battery capacity monitoring to be monitored is further increased.
With reference to Fig. 9, Fig. 9 is the high-level schematic functional block diagram of the battery capacity updating device fourth embodiment of accumulator of the present invention.
The fourth embodiment of the battery capacity updating device of accumulator of the present invention is proposed based on a upper embodiment, in the present embodiment, the battery capacity updating device of the accumulator also includes：
Memory module 100, for present discharge amount being stored to default memory space every the second prefixed time interval.
Default memory space can be EEPROM Electrically Erasable Read Only Memories, and then the discharge capacity data for storing in the event of a power failure still are able to holding.Certainly in the present embodiment, can just described present discharge amount be stored in local file, or present discharge amount is stored in data base.In discharge process, present discharge amount was saved in per 5 minutes in a local file, when reconnecting after monitoring system is disconnected, the discharge capacity of last time can be read from this document, or, in discharge process, the present discharge amount calculated was saved in data base per 5 minutes, so can when monitoring system is reconnected, read from the data base it is all reconnect front unclosed electric discharge recording, while the discharge capacity in record is read out.Continue to calculate discharge capacity after result of calculation when monitoring system acquisition last time exits on the basis of the result of calculation of last time.Integral and calculating when being each refresh current value in monitoring system due to discharge capacity, if so every time refresh current when, all the present discharge amount calculated is preserved, the performance of monitoring system can be reduced.If the preservation moment is separated by longer, and monitoring system has and restarts generation, then the electric discharge value read after restarting has certain error, in practice it has proved that, arrange error of time at intervals when being 5 minutes is preserved in the range of error is allowed, therefore when to arrange the second prefixed time interval be 5 minutes.
The present embodiment is stored present discharge amount to default memory space every the second prefixed time interval by memory module 90, avoid when on-line monitoring system occurs offline situation, the discharge capacity that on-line monitoring system reconnects front that time is lost, the accuracy rate of remaining battery capacity monitoring to be monitored is further increased.
With reference to Figure 10, Figure 10 is the refinement high-level schematic functional block diagram of voltage detection module in Fig. 6.
The refinement functional module embodiment of voltage detection module of the present invention 19 is proposed based on above-described embodiment, in the present embodiment, the voltage detection module 10 includes：
Determining unit 11, at the end of battery discharging to be monitored, determining whether the accumulator to be monitored carries out discharge operation under fully charged state；
State when determining unit 11 proceeds by electric discharge according to the accumulator to be monitored determines if discharge operation is carried out under fully charged state.
Voltage detection unit 12, for when the accumulator to be monitored carries out discharge operation under fully charged state, obtaining discharge voltage.
The present embodiment is by the end of battery discharging to be monitored, determining unit 11 determines whether the accumulator to be monitored carries out discharge operation under fully charged state, then when accumulator to be monitored carries out discharge operation under fully charged state, voltage detection unit 12 obtains discharge voltage, ensure that the accumulator to be monitored is that discharge operation is carried out under fully charged state and then battery capacity is updated, further increase the accuracy rate of remaining battery capacity monitoring to be monitored.
These are only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; equivalent structure or equivalent flow conversion that every utilization description of the invention and accompanying drawing content are made; or other related technical fields are directly or indirectly used in, it is included within the scope of the present invention.
Claims (10)
1. the battery capacity update method of a kind of accumulator, it is characterised in that the battery of the accumulator holds
Amount update method is comprised the following steps：
At the end of battery discharging to be monitored, discharge voltage is obtained；
When the discharge voltage of acquisition is less than predetermined threshold value with the difference of default discharge cut-off voltage, obtain
Take discharge capacity of the accumulator to be monitored at the end of electric discharge；
Discharge capacity using the accumulator to be monitored at the end of electric discharge updates the accumulator to be monitored
Battery capacity.
2. the battery capacity update method of accumulator as claimed in claim 1, it is characterised in that described
At the end of battery discharging to be monitored, obtain electric discharge at the end of discharge voltage the step of after, it is described
Method also includes：
When the difference of the discharge voltage and default discharge cut-off voltage is more than predetermined threshold value, it is determined that described
Whether discharge voltage is less than default discharge cut-off voltage；
When the discharge voltage is less than default discharge cut-off voltage, obtains discharge voltage and be equal to default electric discharge
The discharge capacity of accumulator to be monitored during blanking voltage；
When being equal to default discharge cut-off voltage using the discharge voltage, the discharge capacity of accumulator to be monitored updates
The battery capacity of the accumulator to be monitored.
3. the battery capacity update method of accumulator as claimed in claim 1, it is characterised in that described
At the end of battery discharging to be monitored, obtain discharge voltage the step of before, the battery of the accumulator
Capacity update method also includes：
During discharge operation is carried out to the accumulator to be monitored, every the first prefixed time interval
Detect the discharge current of accumulator to be monitored；
When discharge current is detected every time, obtained in current time interval according to the discharge current for detecting
The first discharge capacity, and calculated first discharge capacity and present discharge amount are overlapped into generation second
Discharge capacity；
The present discharge amount is updated using second discharge capacity；
When the discharge voltage of acquisition is less than predetermined threshold value with the difference of default discharge cut-off voltage, obtain
The step of taking discharge capacity of the accumulator to be monitored at the end of electric discharge includes：
When the difference of the discharge voltage and default discharge cut-off voltage is less than predetermined threshold value, will it is described ought
Discharge capacity of the front discharge capacity as the accumulator to be monitored at the end of electric discharge.
4. the battery capacity update method of accumulator as claimed in claim 3, it is characterised in that adopt
After the step of second discharge capacity updates the present discharge amount, methods described also includes：
Present discharge amount is stored to default memory space every the second prefixed time interval.
5. the battery capacity update method of the accumulator as described in any one of Claims 1-4, its feature
Be, at the end of battery discharging to be monitored, obtain discharge voltage the step of include：
At the end of battery discharging to be monitored, determine the accumulator to be monitored whether under fully charged state
Carry out discharge operation；
When the accumulator to be monitored carries out discharge operation under fully charged state, discharge voltage is obtained.
6. the battery capacity updating device of a kind of accumulator, it is characterised in that the battery of the accumulator holds
Amount updating device includes：
Voltage detection module, for, at the end of battery discharging to be monitored, obtaining discharge voltage；
First acquisition module, for the difference in the discharge voltage and the default discharge cut-off voltage for obtaining
During less than predetermined threshold value, discharge capacity of the accumulator to be monitored at the end of electric discharge is obtained；
First update module, updates for the discharge capacity using the accumulator to be monitored at the end of electric discharge
The battery capacity of the accumulator to be monitored.
7. the battery capacity updating device of accumulator as claimed in claim 6, it is characterised in that described
The battery capacity updating device of accumulator also includes：
Determining module, for being more than default threshold with the difference of default discharge cut-off voltage in the discharge voltage
During value, determine the discharge voltage whether less than default discharge cut-off voltage；
Second acquisition module, for when the discharge voltage is less than default discharge cut-off voltage, acquisition is put
The discharge capacity of accumulator to be monitored when piezoelectric voltage is equal to default discharge cut-off voltage；
Second update module, it is to be monitored when presetting discharge cut-off voltage for being equal to using the discharge voltage
The discharge capacity of accumulator updates the battery capacity of the accumulator to be monitored.
8. the battery capacity updating device of accumulator as claimed in claim 6, it is characterised in that described
The battery capacity updating device of accumulator also includes：
Current detection module, for when discharge operation is carried out to the accumulator to be monitored, every first
Prefixed time interval detects the discharge current of accumulator to be monitored；
3rd acquisition module, for when discharge current is detected every time, according to the discharge current for detecting
The first discharge capacity in current time interval is obtained, and by calculated first discharge capacity and present discharge
Amount is overlapped the second discharge capacity of generation；
3rd update module, for updating the present discharge amount using second discharge capacity；
First acquisition module is additionally operable to little with the difference of default discharge cut-off voltage in the discharge voltage
When predetermined threshold value, using the present discharge amount as accumulator to be monitored the putting at the end of electric discharge
Electricity.
9. the battery capacity updating device of accumulator as claimed in claim 8, it is characterised in that described
The battery capacity updating device of accumulator also includes：
Memory module, for present discharge amount being stored to default storage every the second prefixed time interval
Space.
10. the battery capacity updating device of the accumulator as described in any one of claim 6 to 9, which is special
Levy and be, the voltage detection module includes：
Determining unit, at the end of battery discharging to be monitored, determining that the accumulator to be monitored is
It is no that discharge operation is carried out under fully charged state；
Voltage detection unit, for when the accumulator to be monitored carries out discharge operation under fully charged state,
Obtain discharge voltage.
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