CN106556741A - A kind of device and method of storage battery internal resistance measurement - Google Patents
A kind of device and method of storage battery internal resistance measurement Download PDFInfo
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Abstract
The present invention relates to a kind of device and method of storage battery internal resistance measurement.The device includes：Voltage acquisition module, is connected with accumulator battery, and the voltage for the single battery two ends in collection accumulator battery respectively is simultaneously exported with voltage signal form；Current acquisition module, is connected with accumulator battery, for gather accumulator battery discharge when electric current and with voltage signal form export；Control of discharge module, is connected to form loop with accumulator battery, for being opened or closed loop；Calculation control module, it is connected with voltage acquisition module, current acquisition module, control of discharge module, for sending a control signal to control of discharge module, control control of discharge module is opened or closed loop, the voltage signal that also receiving voltage acquisition module and current acquisition module are exported, according to electric discharge when and electric discharge shut-off when accumulator battery two ends magnitude of voltage, and electric discharge when current value, the internal resistance of calculating accumulator group.The internal resistance value of accumulator battery can accurately be calculated using the device and method.
Description
Technical field
The present invention relates to resistance measurement field, more particularly, it relates to a kind of dress of storage battery internal resistance measurement
Put and method.
Background technology
Stand-by power source of the accumulator battery as electric supply system, is mainly responsible for as secondary line in power system
System provides safe and stable, reliable electric power safeguard.When electric supply electric power system is normal at accumulator battery
In floating charging resting state, when electric supply electric power system failure dead electricity, accumulator battery is rapidly to direct current system
The load of system provides electric energy.The stability of accumulator battery and the reality of load can be supplied in discharge process
Capacity has very important significance to the safe operation for guaranteeing power equipment.
Accumulator after the use of certain hour, can come off because of such as active substance, grid corrosion, sulfuration
Etc. factor, and it is gradually lowered capacity until failure.When the accumulator of failure fails timely to be processed,
Straight-flow system power supply will be unable to the safe operation for guaranteeing power equipment, be likely to result in major accident.In accumulator
The change of resistance can embody its own capacity situation, and then judge accumulator health status, if failure, be
Whether change unsound accumulator and foundation is provided, current device can not detect accumulator exactly
Internal resistance.
The content of the invention
The technical problem to be solved in the present invention is, there is provided a kind of device of storage battery internal resistance measurement and side
Method, can accurately calculate the internal resistance value of each batteries in accumulator battery.
The technical solution adopted for the present invention to solve the technical problems is：Construct a kind of storage battery internal resistance measurement
Device, including：
Voltage acquisition module, is connected with accumulator battery, for gathering the electricity of the single-unit in the accumulator battery respectively
The voltage at pond two ends is simultaneously exported with voltage signal form；
Current acquisition module, is connected with the accumulator battery, for gathering electric current when accumulator battery is discharged simultaneously
Exported with voltage signal form；
Control of discharge module, is connected to form loop with the accumulator battery, for being opened or closed the loop；
Calculation control module, with the voltage acquisition module, the current acquisition module, the control of discharge
Module connects, for sending a control signal to the control of discharge module, to control the control of discharge module
Gradually discharge to the accumulator battery, also receive the voltage acquisition module and the current acquisition module is defeated
The voltage signal for going out, according to electric discharge when and electric discharge shut-off when the accumulator battery two ends magnitude of voltage, Yi Jifang
Current value when electric, calculates the internal resistance of the accumulator battery.
Preferably, the voltage acquisition module includes some voltage acquisition units, respectively with the accumulator battery
In single battery connection.
Preferably, the device of the storage battery internal resistance measurement also includes：
Sample-synchronous control module, with the calculation control module, the voltage acquisition module, the electric current
Acquisition module connects, and for receiving the control signal of the calculation control module output, controls the voltage and adopts
Collection module, the current acquisition module synchronization gather the voltage and current when accumulator battery is discharged.
Preferably, the accumulator battery measurement apparatus also include：
Supply module, is connected with the calculation control module, for powering.
Preferably, the accumulator battery measurement apparatus also include：
Communication module, is connected with the calculation control module and the terminal unit, the calculation control module
Data and receiving data are sent by the communication module.
Preferably, the sample-synchronous control module includes：
Phase inverter corresponding with the voltage acquisition unit, is connected with the voltage acquisition unit；
Decoder, is connected with the calculation control module, the phase inverter, is controlled for receiving described calculating
The control signal of module output is converted into corresponding signal, gradually controls the phase inverter connection voltage and adopts
Collection unit；
Line and logic circuit, input are connected with the input of the phase inverter respectively, outfan and the electricity
Stream acquisition module connection；
Power supply；
Pull-up resistor R, is connected between the line and logic circuit and the power supply.
Preferably, the calculation control module is MCU.
The present invention also provides a kind of method of storage battery internal resistance measurement, comprises the steps：
S1, discharge for the first time to accumulator battery, stop discharging after discharge current is stable for the first time；
S2, give accumulator battery electric discharge again, and when gathering electric discharge, electric discharge shut-off when described in the first batteries
The voltage at two ends, and electric discharge when the first batteries electric current, respectively with first voltage signal, second voltage
Signal, tertiary voltage signal output are to calculation control module；
S3, give accumulator battery electric discharge again, and when gathering electric discharge, electric discharge shut-off when next batteries
The voltage at two ends, and electric discharge when next batteries electric current, respectively with the 4th voltage signal, the 5th voltage
Signal, the 6th voltage signal are exported to the calculation control module；
S4, when judging final section battery discharge and during electric discharge shut-off two ends voltage, and electricity during electric discharge
Whether stream is collected to complete, if it is not, then returning to step S3；
Also comprise the steps：
The calculation control module according to electric discharge when and electric discharge shut-off when the accumulator battery two ends magnitude of voltage,
And current value during electric discharge calculates the storage battery internal resistance.
Preferably, after discharging for the first time, the adjacent time interval discharged twice is less than or equal to 10ms.
Implement the present invention, have the advantages that：Can be to storage battery internal resistance by the device of the present invention
Discharge by direct current pre-arcing and gradually, when in collection accumulator battery, single battery discharges and when electric discharge is turned off
Voltage, and electric current during electric discharge, electricity when being discharged according to single battery in accumulator battery and when electric discharge is turned off
Pressure value and current value accurately calculate the internal resistance value of each batteries in accumulator battery, realize that simply application is strong.
Pre-arcing that this scheme is used and gradually discharge measuring method so that the configuration of number of batteries in accumulator battery
What is become is simple, improves the adaptation to applied environment.
Description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the theory diagram of the device of storage battery internal resistance measurement of the present invention；
Fig. 2 is the illustraton of model of the device of storage battery internal resistance measurement of the present invention；
Fig. 3 is the circuit diagram of sample-synchronous control module in the device that storage battery internal resistance of the present invention is measured；
Fig. 4 is the flow chart of the method for storage battery internal resistance measurement of the present invention；
Fig. 5 is the process schematic of storage battery internal resistance measurement of the present invention.
Specific embodiment
As shown in figure 1, in the device first embodiment of the storage battery internal resistance measurement of the present invention, the device
Including：Voltage acquisition module 100, current acquisition module 200, control of discharge module 300, calculating control
Module 400.
Voltage acquisition module 100 is connected with accumulator battery, calculation control module 400, is stored for collection respectively
The voltage at the single battery two ends in set of cells is simultaneously exported to calculation control module 400 with voltage signal form.
Wherein, accumulator battery includes some batteries：First batteries ..., the n-th batteries.
Current acquisition module 200 is connected with accumulator battery, calculation control module 400, for gathering accumulator
Organize electric current when discharging and exported to calculation control module 400 with voltage signal form.
Control of discharge module 300 is connected to form loop with accumulator battery, for being opened or closed the loop, electricity
Stream acquisition module 200 is also connected in the loop, gathers discharge current.
Calculation control module 400 and voltage acquisition module 100, current acquisition module 200, control of discharge mould
Block 300 connects, for sending a control signal to control of discharge module 300, to control control of discharge module 300
Gradually discharge to accumulator battery, the voltage signal and electric current of the also output of receiving voltage acquisition module 100 are adopted
Collection module 200 output voltage signal, according to electric discharge when and electric discharge shut-off when accumulator battery two ends voltage
Value, and current value during accumulator battery electric discharge, the internal resistance of calculating accumulator group；Here, calculate control mould
Block 400 can be converted into corresponding magnitude of voltage according to the voltage signal of the output of voltage acquisition module 100, may be used also
Corresponding current value is converted into the voltage signal exported according to current acquisition module 200.Wherein, difference root
According in accumulator battery single battery discharge when and electric discharge shut-off when the single battery two ends magnitude of voltage, Yi Jifang
Current value when electric, calculates the internal resistance of the single battery, so as to obtain the internal resistance of accumulator battery.The present embodiment
In, calculation control module 400 is MCU, i.e. micro-control unit.
Voltage acquisition module 100 includes some voltage acquisition units, as shown in Fig. 2 voltage acquisition unit point
It is not connected with the single battery in accumulator battery.The value of n can be according to battery variety, and actual line situation is rounded
Numerical value (similarly hereinafter)；The quantity of voltage acquisition unit is determined according to number of batteries；In current acquisition module 200
Accumulator battery electric discharge load resistance need to be selected according to actual accumulator battery voltage value, keeps discharge current
In safety range；Calculation control module 400 carries out logic control to accumulator battery electric discharge, and voltage is adopted
Collection module 100, the data of the collection of current acquisition module 200 carry out process and obtain every batteries in accumulator battery
Internal resistance value.
Further, the device of storage battery internal resistance measurement also includes sample-synchronous control module 500, power supply
Module 600, communication module 700.
Sample-synchronous control module 500 is adopted with calculation control module 400, voltage acquisition module 100, electric current
Collection module 200 connects, for receiving the control signal of the output of calculation control module 400, control voltage collection
Voltage and current when module 100,200 synchronous acquisition accumulator battery of current acquisition module are discharged.
Supply module 600 is connected with calculation control module 400, for powering.
Communication module 700 is connected with calculation control module 400 and terminal unit, calculation control module 400
Data and receiving data are sent by communication module 700.
Further, as shown in figure 3, sample-synchronous control module 500 includes：With voltage acquisition unit pair
The phase inverter 511 answered, 512 ... 51n, decoder 520, line and logic circuit 530, power supply 540,
Pull-up resistor R.
Phase inverter 511,512 ... 51n is connected with voltage acquisition unit respectively.
Decoder 520 and calculation control module 400, phase inverter 511,512 ... 51n is connected, and is used for
The control signal for receiving the output of calculation control module 400 is converted into corresponding signal, gradually controls phase inverter
511st, 512 ... 51n connects voltage acquisition unit, when one of phase inverter connects voltage acquisition unit,
Then other phase inverters just disconnect corresponding voltage acquisition unit.Specifically, the output of decoder 520 is drawn
Foot number is corresponding with voltage acquisition unit number, when calculation control module 400 exports the first control signal to decoder
520, the first output pin of decoder 520 exports low level signal to corresponding first phase inverter 511,
Low level signal is converted into high level signal output by the first phase inverter 511, connects corresponding voltage acquisition list
Unit, at the same time, other output pins of decoder 520 export high level signal to corresponding phase inverter
512nd ... 51n, corresponding phase inverter 512 ... high level signal is converted into low level signal by 51n
Output, just will not connect corresponding voltage acquisition unit.
In the same manner, when the second output pin of decoder 520 exports low level signal to corresponding second phase inverter
512, low level signal is converted into high level signal output by the second phase inverter 512, connects corresponding voltage
Collecting unit, at the same time, other output pins of decoder 520 export high level signal to corresponding
Phase inverter 511,513 ... 51n, corresponding phase inverter 511,513 ... 51n is by high level signal
Low level signal output is converted into, corresponding voltage acquisition unit just will not be connected.
The input of line and logic circuit 530 respectively with phase inverter 511,512 ... the input of 51n connects
Connect, outfan is connected with current acquisition module 200.When having one in the input of line and logic circuit 530
Input pin accesses low level signal, other input pins and accesses high level signal, line and logic circuit 530
Outfan then export high level signal, connected come control electric current acquisition module 200 by high level signal,
Start to gather electric current.
By using synchronization control module 500, voltage that can be gradually in control voltage acquisition module 100 is adopted
Collection unit gathers the voltage of single battery, and also control electric current acquisition module 200 is in voltage acquisition unit collection electricity
While pressure, electric current is also gathered.
Pull-up resistor R connections are online between logic circuit 530 and power supply 540.
Voltage acquisition module 100, current acquisition module 200 are communicated to connect with calculation control module 400, point
The voltage and current of collection is not exported to calculation control module 400, the present embodiment in the form of voltage signal
Middle calculation control module 400 is MCU, and MCU only has two signal input channels here, and one used as voltage
The passage of the voltage signal of the output of acquisition module 100, the voltage as the output of current acquisition module 200
The passage of signal, it is if the voltage in accumulator battery per batteries is gathered simultaneously, together that voltage signal is defeated
Go out the voltage signal passage of the voltage acquisition module 100 to MCU, then can cause the voltage signal in the passage
Interfere each other, cause the magnitude of voltage for gathering inaccurate, affect the result of last measurement, so this
Gather in invention and gradually discharge, gather the voltage signal and current signal of single battery in accumulator battery.
The present invention also provides a kind of method of storage battery internal resistance measurement, as shown in figure 4, comprising the steps：
S1, discharge for the first time to accumulator battery, stop discharging after discharge current is stable for the first time.
S2, give accumulator battery electric discharge again, and when gathering electric discharge, electric discharge shut-off when the first batteries two ends electricity
Pressure, and during electric discharge the first batteries electric current, respectively with first voltage signal, second voltage signal, the
Three voltage signals are exported to calculation control module 400.
S3, give accumulator battery electric discharge again, and when gathering electric discharge, electric discharge shut-off when next batteries two ends electricity
Pressure, and during electric discharge next batteries electric current, respectively with the 4th voltage signal, the 5th voltage signal, the
Six voltage signals are exported to calculation control module 400.
S4, when judging final section battery discharge and during electric discharge shut-off two ends voltage, and electricity during electric discharge
Whether stream is collected to complete, if it is not, then return to step S3, if so, then execution step S5.
S5, stop give accumulator battery electric discharge.
Said method also includes step：Calculation control module 400 according to electric discharge when and electric discharge shut-off when accumulator
The magnitude of voltage at group two ends, and current value calculating accumulator group internal resistance during accumulator battery electric discharge.Need explanation
, the step can be performed after step s4, it is also possible to be carried out after step S2 and S3.
Wherein, according to electric discharge when and electric discharge shut-off when accumulator battery in each batteries two ends magnitude of voltage, and should
Current value during economize on electricity tank discharge, calculates the internal resistance of the batteries, so as to obtain the internal resistance of accumulator battery.
After being discharged in said method for the first time, the adjacent time interval discharged twice is less than or equal to 10ms.
As shown in figure 5, ON represents that electric discharge is opened in control of discharge, OFF represents electric discharge shut-off；Calculate control
The control of molding block 400 accumulator battery carry out pre-arcing to accumulator battery terminal voltage, discharge current it is stable after, then
Gradually discharged.Wherein, t1_1, t1_2, t2_1, t2_2, tn_1, tn_2 are represented
The moment of accumulator voltage V1_1, V1_2, V2_1, V2_2, Vn_1, Vn_2；I1, I2, I3 table
Show the discharge current with V1_1, V2_1, Vn_1 synchronous acquisition.
Storage battery internal resistance can be obtained according to Ohm's law to be respectively：
First segment internal resistance of cell R1=(V1_2-V1_1)/I1.
Second section internal resistance of cell R2=(V2_2-V2_1)/I2.
……
N-th batteries internal resistance Rn=(Vn_2-Vn_1)/In.
In formula, V1_1, V2_1, Vn_1 represent corresponding first segment, second section, the n-th batteries in electric power storage
Terminal voltage value when pond group is discharged；V1_2, V2_2, Vn_2 represent corresponding first segment, second section, n-th
The terminal voltage value that batteries are discharged when turning off in accumulator battery；I1, I2, In represent corresponding first segment,
Two sections, discharge current value of n-th batteries when accumulator battery is discharged.
In sum, the present invention passes through direct current pre-arcing for storage battery internal resistance and gradually discharges there is provided one
Individual effective measurement scheme, by gradually discharging to accumulator battery, single battery electric discharge in collection accumulator battery
When and voltage during electric discharge shut-off, and electric current during electric discharge, accurately calculate in accumulator battery the electric power storage of each section
The internal resistance value in pond, realizes that simply application is strong.Pre-arcing that this scheme is used and gradually discharge measuring side
Method so that the configuration change of number of batteries is simple in accumulator battery, improves the adaptation to applied environment.Electricity
The synchronized sampling of pressure and discharge current, improves suppression of the system to background noise, while decreasing internal resistance
Measurement error in measurement process.
It should be understood that above example only expresses the preferred embodiment of the present invention, its description more has
Body and in detail, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention；It should be pointed out that
For the person of ordinary skill of the art, without departing from the inventive concept of the premise, can be to above-mentioned
Technical characterstic carries out independent assortment, can also make some deformations and improvement, and these belong to the guarantor of the present invention
Shield scope；Therefore, all equivalents done with scope of the invention as claimed and modification, all should belong to this
The covering scope of invention claim.
Claims (9)
1. the device that a kind of storage battery internal resistance is measured, it is characterised in that include：
Voltage acquisition module（100）, be connected with accumulator battery, for gather respectively the single battery two ends in the accumulator battery voltage and with voltage signal form export；
Current acquisition module（200）, be connected with the accumulator battery, for gather accumulator battery discharge when electric current and with voltage signal form export；
Control of discharge module（300）, it is connected to form loop with the accumulator battery, for being opened or closed the loop；
Calculation control module（400）, with the voltage acquisition module（100）, the current acquisition module（200）, the control of discharge module（300）Connection, for sending a control signal to the control of discharge module（300）, to control the control of discharge module（300）Gradually discharge to the accumulator battery, also receive the voltage acquisition module（100）And the current acquisition module（200）The voltage signal of output, according to the magnitude of voltage at accumulator battery two ends during electric discharge and during electric discharge shut-off, and current value during electric discharge, calculate the internal resistance of the accumulator battery.
2. the device that storage battery internal resistance according to claim 1 is measured, it is characterised in that the voltage acquisition module（100）Including some voltage acquisition units, it is connected with the single battery in the accumulator battery respectively.
3. the device that storage battery internal resistance according to claim 2 is measured, it is characterised in that the device of the storage battery internal resistance measurement also includes：
Sample-synchronous control module（500）, with the calculation control module（400）, the voltage acquisition module（100）, the current acquisition module（200）Connection, for receiving the calculation control module（400）The control signal of output, controls the voltage acquisition module（100）, the current acquisition module（200）Voltage and current when accumulator battery described in synchronous acquisition is discharged.
4. the device that storage battery internal resistance according to claim 1 is measured, it is characterised in that the accumulator battery measurement apparatus also include：
Supply module（600）, with the calculation control module（400）Connection, for powering.
5. the device that storage battery internal resistance according to claim 1 is measured, it is characterised in that the accumulator battery measurement apparatus also include：
Communication module（700）, with the calculation control module（400）Connect with the terminal unit, the calculation control module（400）By the communication module（700）Send data and receiving data.
6. the device that storage battery internal resistance according to claim 3 is measured, it is characterised in that the sample-synchronous control module（500）Including：
Phase inverter corresponding with the voltage acquisition unit（511、512、……51n）, it is connected with the voltage acquisition unit；
Decoder（520）, with the calculation control module（400）, the phase inverter（511、512、……51n）Connection, for receiving the calculation control module（400）The control signal of output is converted into corresponding signal, gradually controls the phase inverter（511、512、……51n）Connect the voltage acquisition unit；
Line and logic circuit（530）, input respectively with the phase inverter（511、512、……51n）Input connection, outfan and the current acquisition module（200）Connection；
Power supply（540）；
Pull-up resistor R, is connected to the line and logic circuit（530）With the power supply（540）Between.
7. the device that storage battery internal resistance according to claim 3 is measured, it is characterised in that the calculation control module（400）For MCU.
8. a kind of method that storage battery internal resistance is measured, it is characterised in that comprise the steps：
S1, discharge for the first time to accumulator battery, stop discharging after discharge current is stable for the first time；
S2, again give the accumulator battery electric discharge, and when gathering electric discharge, electric discharge shut-off when described in the first batteries two ends voltage, and electric discharge when the first batteries electric current, respectively with first voltage signal, second voltage signal, tertiary voltage signal output to calculation control module（400）；
S3, again give the accumulator battery electric discharge, and when gathering electric discharge, electric discharge shut-off when next batteries two ends voltage, and electric discharge when next batteries electric current, exported to the calculation control module with the 4th voltage signal, the 5th voltage signal, the 6th voltage signal respectively（400）；
S4, when judging final section battery discharge and during electric discharge shut-off two ends voltage, and whether electric current during electric discharge collected completes, if it is not, then returning to step S3；
Also comprise the steps：
Magnitude of voltage of the calculation control module according to accumulator battery two ends during electric discharge and during electric discharge shut-off, and current value during electric discharge calculates the storage battery internal resistance.
9. the method that storage battery internal resistance according to claim 8 is measured, it is characterised in that after discharging for the first time, the adjacent time interval discharged twice is less than or equal to 10ms.
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| CN113466730A (en) * | 2021-06-30 | 2021-10-01 | 郑州易能科技有限公司 | Storage battery internal resistance flash measurement device and method |
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