CN105021995B - Portable intelligent accumulator parameter method of testing and tester - Google Patents
Portable intelligent accumulator parameter method of testing and tester Download PDFInfo
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- CN105021995B CN105021995B CN201510451155.1A CN201510451155A CN105021995B CN 105021995 B CN105021995 B CN 105021995B CN 201510451155 A CN201510451155 A CN 201510451155A CN 105021995 B CN105021995 B CN 105021995B
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Abstract
A kind of portable intelligent accumulator parameter method of testing and tester, it is made up of internal resistance volume test device and discharge characteristic curve test device two parts；Its step is as follows：Decline internal resistance method measurement accumulator internal resistance using direct current dynamic electric voltage；" internal resistance --- capacity curve method " is utilized to measure accumulator capacity；Before capacity is measured, " internal resistance --- the capacity curve " of the model specification corresponding with tested battery is input in the eeprom memory of accumulator parameter tester, the dead load sensor of the resistance corresponding with tested battery model specification is used using " direct current dynamic electric voltage declines internal resistance method " when measuring capacity, tested battery is set to be measured under " direct current dynamic transient impulsive discharge state " " internal resistance of direct current dynamic " of battery, then computation of table lookup is carried out with " internal resistance --- the capacity curve " being stored in parameter tester by the single-chip microcomputer of accumulator parameter tester, obtain accumulator capacity.
Description
Technical field
The present invention relates to a kind of portable intelligent accumulator parameter method of testing and tester.
Background technology
Battery has been widely used in industry, agricultural, military and the national economic development all trades and professions, battery
" discharge characteristic curve ", internal resistance, the parameter such as capacity be to weigh the important parameter of accumulator quality, direct convenience, accurately survey
The parameters such as amount battery " discharge characteristic curve ", internal resistance, capacity are to ensure that the storage of the links such as the production, circulation, maintenance of battery
Battery repair quality is crucial.When " rated capacity " battery is with certain constant-current discharge, curve that voltage atdischarge end changes over time
Referred to as battery " discharge characteristic curve ", this curve are the standards for the parameter such as internal resistance, capacity for measuring battery.Often survey a song
The about 10 hours line time (10H discharge rates)；Accumulator internal resistance is not constant, there is the letter of complexity between internal resistance and capacity and electric current
Number relations, currently without a kind of method can directly, conveniently, accurately measure internal resistance；Battery is carried out under certain discharging condition
During constant-current discharge, when voltage atdischarge end reaches final voltage, by discharge current and reach " final discharging voltage " it is lasting when
Between be multiplied that to calculate the electricity released be accumulator capacity, the method is referred to as " electric discharge ", and " electric discharge " measurement accurately, measures capacity
Meet " discharge characteristic curve " requirement of battery national standard.But " electric discharge " must in dedicated location, using special equipment,
Accumulator electric-quantity is all released, then its electricity is full of again, indirectly measures capacity, time of measuring about needs 10 hours left sides
It is right." electric discharge " can not as measurement length and weight direct, convenient measurement, it is impossible to meet battery service work need
Will.Because can not accomplish to carry out effective supervision and inspection to accumulator internal resistance and capacity, can not accomplish from beginning of production, circulation
And the link such as maintenance maintains strict control over battery repair quality pass, scraps pass due to that can not maintain strict control over battery, formed at present in the whole nation " with
The battery queasy transaction phenomenon of trade-in ", a large amount of qualified batteries are made to scrap in advance, according to relevant statistics, battery
Average life be only projected life 60%, therefore produce the huge energy and economic loss, seriously restrict national economy
Develop and that reforms and opens up to the outside world is normally carried out.
The content of the invention
The present invention is to solve above mentioned problem existing for prior art, there is provided a kind of portable intelligent accumulator parameter test
Method and tester, tester measurement is accurate, and the internal resistance and capacity measured meet " the flash-over characteristic song of battery national standard
Line " requirement, it is suitably applied industrial, agriculture, military and the national economic development using battery as in all trades and professions of power.
The present invention technical solution be：
Portable intelligent accumulator parameter method of testing, its step are as follows：
1st, internal resistance method measurement accumulator internal resistance is declined using direct current dynamic electric voltage
According to battery national standard, by single-unit " rated capacity " battery of Pass Test condition with defined discharge rate
Constant-current discharge is carried out, Timing measurement voltage simultaneously draws " discharge characteristic curve " for meeting battery national standard, while in " electric discharge
10-20 capacity point is averagely taken corresponding to characteristic curve " in the range of battery maximum capacity to minimum capacity and uses interior capacitance-resistance
Dead load sensor in amount test device makes battery be in " under direct current dynamic transient impulsive discharge state ", utilizes monolithic
Machine gathers sky/load voltage and discharge current detection signal, and " internal resistance of direct current dynamic " is measured by multibyte floating point computing, according to
Logarithmic relationship in the whole excursion of capacity between accumulator internal resistance and electric current, determine that the impact of direct current dynamic transient is put
" optimum value " of electric current is at 1.8 times -2.2 times of discharge current corresponding to defined discharge rate, and determines constant-current discharge
The resistance in loop is the resistance of " dead load ", and this " optimum value " makes battery each on " discharge characteristic curve " described in correspondence
Capacity point produces the internal resistance r of a sufficiently large stabilization, while produces the voltage drop Δ μ of a sufficiently large stabilization, now accurately
Measurement battery electromotive force E, discharge voltage V and discharge current I, measure internal resistance r=(E-V)/I=Δs μ/I of battery；
2nd, " internal resistance --- capacity curve method " is utilized to measure accumulator capacity
While the discharge characteristic curve is drawn, " direct current dynamic electric is used in each capacity point of discharge characteristic curve
Drops internal resistance method " uses dead load sensor, battery is being measured one " under direct current dynamic transient impulsive discharge state "
Cluster " internal resistance of direct current dynamic ", using each capacity point to " discharge characteristic curve " and the cluster " internal resistance of direct current dynamic " measured, paint
Make " internal resistance --- capacity curve " corresponding to the battery of respective model, this curve from capacity maximum to capacity minimum category in
Each capacity point have unique one from be minimal to maximum sufficiently large stabilization " internal resistance of direct current dynamic " it is corresponding and above-mentioned
The corresponding each capacity point of two curves matches, and this " internal resistance --- capacity curve " is the standard of cubic content measurement；
3rd,, will be with quilt before capacity is measured because battery model specification different its " internal resistance --- capacity curves " is different
The EEPROM that " internal resistance --- the capacity curve " of the corresponding model specification of survey battery is input to accumulator parameter tester is deposited
It is corresponding with tested battery model specification using " direct current dynamic electric voltage declines internal resistance method " use when measuring capacity in reservoir
Resistance dead load sensor, tested battery is measured battery under " direct current dynamic transient impulsive discharge state "
" internal resistance of direct current dynamic ", then by accumulator parameter tester single-chip microcomputer and be stored in parameter tester " internal resistance ---
Capacity curve " carries out computation of table lookup, obtains accumulator capacity.
According to different tested battery model specifications, the dead load in replaceable corresponding dead load sensor is simultaneously
By the corresponding battery model specification of input through keyboard and detection date in the eeprom memory being connected with single-chip microcomputer.
The portable intelligent accumulator parameter tester, it is by internal resistance volume test device and discharge characteristic curve test dress
Put two parts composition；The internal resistance volume test device is included with internal resistance, capacity sampling terminal B, C dead load sensor
1, difference amplifier 2, wave filter 3, A/D converter 4, single-chip microcomputer 5, voice warning circuit 6, liquid crystal display 7, mini-printer
8, eeprom memory 9, sky/load judgment circuit 10 and keyboard 11；The output signal line being connected on dead load sensor 1
106 and 107 output sky/load voltages and discharge current detection signal, and be connected with the input of difference amplifier 2, while by list
Piece machine 5 inputs control voltage and enters sky/load judgment circuit 10, then exports sentencing for high/low level by sky/load judgment circuit 10
Power-off pressure is input to difference amplifier 2, and filtered device 3, A/D converter 4 are input to single-chip microcomputer 5 and carry out sky/load judgment, data
Processing and calculating, measure electromotive force E, discharge voltage V and discharge current, accurately measure the internal resistance of battery, are drawn according to tabling look-up
Capacity, every measured parameter is printed by liquid crystal display 7 and mini-printer 8；The working power 12 of the tester is using tool
There are power shortage protection, the battery of voltage stabilizing current limliting automatic charging function；
The discharge characteristic curve test device, including by being connected between discharge characteristic curve calibrating terminal B`, C`
Constant-current discharge circuit switching K2, tunable load displacement amount control device 1302, parameter acquisition current/voltage converter 1301 are formed
Constant-current discharge loop 13；By be sequentially connected preset voltage adjuster 15, voltage comparator 14, electric current lifting/lowering controller 16,
The current constant control loop that stepless speed regulation stepper motor 17 and decelerator 18 are formed, through parameter acquisition current/voltage converter 1301
The magnitude of voltage after discharge current value conversion A/V is gathered, is adjusted into voltage comparator 14 with providing the preset voltage of preset voltage values
Section device 15 is compared, and comparative result is received by electric current lifting/lowering controller 16, and input and rise to stepless speed regulation stepper motor 17/
Drop control voltage makes stepless speed regulation stepper motor 17 produce forward or reverse, is used to control tunable load after the deceleration of decelerator 18
The displacement of tunable load and constant-current discharge loop 13 resistance is increased or is subtracted in displacement amount control device 1302, realize full-automatic control
Discharge current processed it is constant.
The dead load sensor, including the switch matrix 103 of longitudinal hole is opened up, insulation is installed with the longitudinal hole
Set 108, switch matrix 103 side is provided with insulated handle 109, opposite side is provided with insulator 111, on insulator 111
Dead load 102 is fixed with, matrix 103 is connected the one end of dead load 102, the other end and connecting cable 101 connect with switch,
Conductive lever 110 is installed with insulation sleeve 108, conductive knob has been connected through a screw thread in an exit of conductive lever 110
104, it is allowed to be opened or closed with dead load 102, another exit of conductive lever 110 is connected with connecting cable 105, institute
The exit for stating connecting cable 101,105 is connected with internal resistance, capacity sampling terminal B, C, 106,107 points of the output signal line
Internal resistance is not connected on, on capacity sampling terminal B, C, internal resistance, capacity sampling terminal B, C are connected on accumulator anode and cathode connecting plate respectively
On.
The tunable load displacement amount control device 1302, including bottom bracket 23, are set in parallel on bottom bracket 23
Two load 24, the stepless speed regulation stepper motor 17 and decelerator 18 are arranged on the side of bottom bracket 23, in bottom bracket
Leading screw 19 is fixed with 23, the other end of the leading screw 19 is connected with the output end of decelerator 18, and screw 20 is connected with leading screw,
Carbon brush 22, the other end of the carbon brush 22 and two 24 sliding contacts of load are connected with the lower elastic of screw 20.
The single-chip microcomputer 5 uses 89C51 series high-performance single-chip microcomputers, and A/D converter 4 uses and is based on high performance sigma-delta
Sampling techniques and LC2The A/D7701 converters of mos technologies.
The precision of the parameter acquisition current/voltage converter 1301 is 10mA, the preset voltage adjuster 15 and electricity
The precision for pressing comparator 14 is 1mv.
The revolution of the stepless speed regulation stepper motor 17 is 45~90 revs/min；The decelerator 18 is 6：1-10：1 transmission
The decelerator of ratio, the displacement of the tunable load displacement amount control device 1302 is 5.8~6.2 millis m/min, to realize load
Resistance increases and decreases the regulation for μ Ω levels in the range of m Ω levels.
The temperature coefficient of load 24 in the tunable load displacement amount control device 1302 is less than or equal to 0.0000051/
DEG C, it is ensured that the resistance stabilization and resistance accuracy of load.
The beneficial effects of the invention are as follows：
1st, the model specification of battery is different, " discharge characteristic curve " of battery and " internal resistance --- capacity curve " no
Together, " internal resistance --- the capacity curve " for measuring different model is standby.Often surveying a curve needs nearly 10 hours (10H discharge rates).
Every time measurement internal resistance and during capacity discharge time be second level, the electricity of releasing for be tested the ten thousand of battery " retained storage capacity "/
It is several, so through being not required to supplement electricity to battery after discharge measuring.This " internal resistance --- capacity curve method " can directly, conveniently,
Accurately measurement accumulator internal resistance and capacity, and meet " discharge characteristic curve " requirement of battery national standard.
2nd, battery " discharge characteristic curve " is the most important parameters for weighing accumulator quality, while is also measurement battery
Internal resistance and the standard of capacity, accurately measure battery " discharge characteristic curve " and be to ensure that accumulator parameter tester measurement accuracy
Key, by experimental condition single-unit " rated capacity " battery for meeting battery national standard with certain discharge rate carry out constant current
During electric discharge, when measuring " discharge characteristic curve " that battery discharging terminal voltage changes over time, ensured by current constant control loop
Discharge current it is constant, (time is 10 hours if discharge rate is 10H) is with the reduction of accumulator capacity in a long time
Then the internal resistance of battery still ensures that the resistance in constant-current discharge loop can reduction automatic, synchronous, with value with the increase of μ Ω levels.Survey
Accuracy of measurement is high, and its precision of the accumulator internal resistance measured reach 0.001m Ω, the tester be suitably applied industry, agricultural, military affairs and
Each sciemtifec and technical sphere of the national economic development is using battery as in all trades and professions of power.
3rd, unloaded and load voltage is gathered using " four-wire method " (two connecting cables, two output lines), it is ensured that
" internal resistance of direct current dynamic " measurement accuracy；The direct current dynamic internal resistance very little of battery, and " most preferably " discharge current is very big, this electric current
Very big voltage drop is produced in constant-current discharge loop, is separated voltage and current loop using " four-wire method ", it is ensured that data acquisition
Precision ensures " internal resistance of direct current dynamic " measurement accuracy.
Brief description of the drawings
Fig. 1 is the theory diagram of the tester；
Fig. 2 is the structural representation of dead load sensor；
Fig. 3 is tunable load displacement amount control device；
Fig. 4 is Fig. 3 top view；
Fig. 5 is the discharge characteristic curve and internal resistance capacity curve schematic diagram of the present invention；
In figure：1- dead load sensors, 2- difference amplifiers, 3- wave filters, 4-A/D converters, 5- monolithics
Machine, 6- voice warning circuits, 7- liquid crystal displays, 8- mini-printers, 9-EEPROM memories, 10- skies/load are sentenced
Deenergizing, 11- keyboards, 12- working powers, 13- constant-current discharges loop, 14- voltage comparators, the regulation of 15- preset voltages
Device, 16- electric current lifting/lowering controllers, 17- stepless speed regulation stepper motors, 18- decelerators, 19- leading screws, 20- screws, 21-
Spring, 22- carbon brush, 23- bottom brackets, 24- loads, 101- connecting cables, 102- dead loads, 103- switch bases
Body, 104- conduction knobs, 105- connecting cables, 106- output signal lines, 107- output signal lines, 108- insulation sleeves,
109- insulated handles, 110- conductive levers, 111- insulators, 1301- parameter acquisition current/voltage converters, 1302-
Tunable load displacement amount control device.
Embodiment
As shown in figure 1, the portable intelligent accumulator parameter tester, is by internal resistance volume test device and flash-over characteristic
Curve testing device two parts form.
The internal resistance volume test device is included with internal resistance, capacity sampling terminal B, C dead load sensor 1, poor
Point amplifier 2, wave filter 3, A/D converter 4, single-chip microcomputer 5, voice warning circuit 6, liquid crystal display 7, mini-printer 8,
Eeprom memory 9, sky/load judgment circuit 10 and keyboard 11；The single-chip microcomputer 5 uses 89C51 series high-performance single-chip microcomputers,
A/D converter 4 uses and is based on high performance sigma-delta Sampling techniques and LC2The A/D7701 converters of mos technologies.It is fixed
The output signal line 106 and 107 of load cell 1 exports sky/load voltage and discharge current detection signal by signal wire, and
It is connected with the input of difference amplifier 2, while control voltage is inputted by single-chip microcomputer 5 and enters sky/load judgment circuit 10, then by
Sky/load judgment circuit 10 exports the judgement control source of high/low level to difference amplifier 2, filtered device 3, A/D converter
4, which are input to single-chip microcomputer 5, carries out sky/load judgment, data processing and calculating, measures electromotive force E, discharge voltage V and discharge current,
The accurate internal resistance for measuring battery, according to tabling look-up capacity is drawn, prompted by voice warning circuit 6, by liquid crystal display 7 and miniature
Printer 8 prints every measured parameter；The working power 12 of the tester using having, protected, voltage stabilizing current limliting is filled automatically by power shortage
The battery of Electricity Functional.
The discharge characteristic curve test device, including by being connected between discharge characteristic curve calibrating terminal B`, C`
Constant-current discharge circuit switching K2, tunable load displacement amount control device 1302, parameter acquisition current/voltage converter 1301 are formed
Constant-current discharge loop 13；By be sequentially connected preset voltage adjuster 15, voltage comparator 14, electric current lifting/lowering controller 16,
The current constant control loop that stepless speed regulation stepper motor 17 and decelerator 18 are formed, through parameter acquisition current/voltage converter 1301
The magnitude of voltage after discharge current value conversion A/V is gathered, is adjusted into voltage comparator 14 with providing the preset voltage of preset voltage values
Section device 15 is compared, and comparative result is received by electric current lifting/lowering controller 16, and input and rise to stepless speed regulation stepper motor 17/
Drop control voltage makes stepless speed regulation stepper motor 17 produce forward or reverse, is used to control tunable load after the deceleration of decelerator 18
The displacement of tunable load and constant-current discharge loop 13 resistance is increased or is subtracted in displacement amount control device 1302, realize full-automatic control
Discharge current processed it is constant.The precision of the parameter acquisition current/voltage converter 1301 is 10mA, the preset voltage regulation
The precision of device 15 and voltage comparator 14 is 1mv.
As shown in Fig. 2 the dead load sensor 1, including the switch matrix 103 of longitudinal hole is opened up, in the longitudinal direction
Insulation sleeve 108 is installed with hole, switch matrix 103 side is provided with insulated handle 109, opposite side is provided with insulator 111,
Dead load 102 is fixed with insulator 111, the one end of dead load 102 is connected with switch matrix 103, the other end is with being connected electricity
Cable 101 is connected, and conductive lever 110 is installed with insulation sleeve 108, is connected in an exit of conductive lever 110 by screw thread
Conductive knob 104 is connected to, conductive knob 104 forms sky/load transfer switch K1 with switch matrix 103, and conductive knob 104 screws out
Or precession is allowed to contact or do not contact with switch matrix 103, i.e. sky/load transfer switch K1 be in unloaded or load condition and then
It is set to be opened or closed with dead load 102, another exit of conductive lever 110 is connected with connecting cable 105, the company
The exit for connecing cable 101,105 is connected with internal resistance, capacity sampling terminal B, C, and the output signal line 106,107 connects respectively
On internal resistance, capacity sampling terminal B, C, internal resistance, capacity sampling terminal B, C are connected on accumulator anode and cathode connecting plate respectively.
As shown in Figure 3 and Figure 4, the tunable load displacement amount control device 1302, including bottom bracket 23, be arranged in parallel
Two loads 24 on bottom bracket 23, the temperature coefficient for loading 24 are less than or equal to 0.0000051/ DEG C, it is ensured that the resistance of load
Value stabilization and resistance accuracy.The stepless speed regulation stepper motor 17 and decelerator 18 are arranged on the side of bottom bracket 24, in bottom
Two leading screws 19 are fixed with support 24, the other end of the leading screw 19 is connected with the output end of decelerator 18, connected on leading screw
Have screw 20, the hollow bulb in the bottom of screw 20 is elasticly connected with carbon brush 22 by spring 21, the other end of two carbon brush 22 with
Two 24 sliding contacts of load.
The revolution of the stepless speed regulation stepper motor 17 is 45~90 revs/min；The decelerator 18 is 6：1-10：1 transmission
The decelerator of ratio, the displacement of the tunable load displacement amount control device 1302 is 5.8~6.2 millis m/min, to realize load
Resistance increases and decreases the regulation for μ Ω levels in the range of m Ω levels.
It is as follows with reference to Fig. 5, the portable intelligent accumulator parameter method of testing, its step：
1st, internal resistance method measurement accumulator internal resistance is declined using direct current dynamic electric voltage
According to battery national standard, by single-unit " rated capacity " battery of Pass Test condition with defined discharge rate
Constant-current discharge is carried out, Timing measurement voltage simultaneously draws the discharge characteristic curve for meeting battery national standard, while special in electric discharge
10-20 capacity point is averagely taken corresponding to linearity curve in the range of battery maximum capacity to minimum capacity and uses internal resistance capacity
Dead load sensor 1 in test device makes battery be under direct current dynamic transient impulsive discharge state, utilizes single-chip microcomputer 5
Sky/load voltage and discharge current detection signal are gathered, direct current dynamic internal resistance is measured by multibyte floating point computing, according to holding
Logarithmic relationship in the whole excursion of amount between accumulator internal resistance and electric current, determine direct current dynamic transient impulsive discharge electricity
The optimum value of stream is at 1.8 times -2.2 times of discharge current corresponding to defined discharge rate, and determines constant-current discharge loop
Resistance is the resistance of dead load, and this optimum value makes each capacity point of the battery on the corresponding discharge characteristic curve produce
The internal resistance r of one sufficiently large stabilization, while the voltage drop Δ μ of a sufficiently large stabilization is produced, now accurately measure battery
Electromotive force E, discharge voltage V and discharge current I, measure internal resistance r=(E-V)/I=Δs μ/I of battery；
2nd, " internal resistance --- capacity curve method " is utilized to measure accumulator capacity
While the discharge characteristic curve is drawn, direct current dynamic electric voltage is used in each capacity point of discharge characteristic curve
Decline internal resistance method and use dead load sensor 1, battery is measured cluster under direct current dynamic transient impulsive discharge state straight
Flowable state internal resistance, using each capacity point to discharge characteristic curve and the cluster direct current dynamic internal resistance measured, draw out corresponding type
Number battery corresponding to " internal resistance --- capacity curve ", this curve from capacity maximum to capacity minimum category in each capacity
Point has unique one, and above-mentioned two curve phase corresponding from the sufficiently large and stable direct current dynamic internal resistance for being minimal to maximum
Corresponding each capacity point matches, and this " internal resistance --- capacity curve " is the standard of cubic content measurement；
3rd,, will be with quilt before capacity is measured because battery model specification different its " internal resistance --- capacity curves " is different
The EEPROM that " internal resistance --- the capacity curve " of the corresponding model specification of survey battery is input to accumulator parameter tester is deposited
It is corresponding with tested battery model specification using the decline internal resistance method use of direct current dynamic electric voltage when measuring capacity in reservoir 9
Resistance dead load sensor, tested battery is measured the straight of battery under direct current dynamic transient impulsive discharge state
Flowable state internal resistance, the then single-chip microcomputer 5 by accumulator parameter tester and " internal resistance --- the capacity that is stored in parameter tester
Curve " carries out computation of table lookup, obtains accumulator capacity.
According to different tested battery model specifications, replaceable corresponding dead load 102 is simultaneously inputted by keyboard 11
Corresponding battery model specification and detection date are in the eeprom memory 9 being connected with single-chip microcomputer 5.
Concrete operation step is as follows：
Constant-current discharge circuit switching K2 is disconnected, connects tester power switch K, working power 12 works, and will meet storage
On experimental condition single-unit " rated capacity " battery access discharge characteristic curve calibrating terminal B`, C` of battery national standard, according to
The corresponding preset voltage values of preset voltage adjuster 15 are adjusted according to tested battery model, specification and certain " discharge rate ",
Constant-current discharge loop K2 is connected, tested battery is discharged with corresponding discharge current, converted by parameter acquisition current/voltage
Device 1301 gathers discharge current value, and the magnitude of voltage after converted A/V is input to voltage comparator 14 and preset voltage adjuster 15
Preset voltage values be compared, comparative result is input to electric current lifting/lowering controller 16, it is then that lifting/lowering control voltage is defeated
Enter to stepless speed regulation stepper motor 17 and be allowed to produce just or invert, then go to control leading screw 19 to rotate after by decelerator 18 being slowed down,
Screw 20 is translated, load resistance is changed by carbon brush 22, constant-current discharge loop resistance value is increased or is subtracted, realizes the perseverance of discharge current
Fixed Automatic Control.When electric discharge starts, start timing, and measure battery discharging terminal voltage value, every (electric discharge in 1 hour
Rate is 10H), a voltage atdischarge end is measured, until electric discharge terminates.The curve that this " voltage atdischarge end " changes over time is referred to as storing
" discharge characteristic curve " of battery national standard.The battery of different model is changed, is obtained corresponding " discharge characteristic curve "
The measurement of accumulator internal resistance and capacity：
Before measurement internal resistance, capacity, by " internal resistance --- the capacity curve " of the model specification corresponding with tested battery
It is input in the eeprom memory 9 of accumulator parameter tester, during measurement, uses the model corresponding with tested battery to advise
Lattice, internal resistance, capacity sampling terminal B, C connect the positive and negative electrode of battery to be measured, gather every measured signal, dead load is passed
The conductive knob 104 of sensor 1 screws out or precession, is allowed to be opened or closed with switch matrix 103, and then be allowed to and dead load
102 are opened or closed, and tested battery changes under sky/load condition, and sky/load electricity is exported by output line 106 and 107
Pressure, discharge current signal, into difference amplifier 2, inputting control voltage by single-chip microcomputer 5 enters sky/load judgment circuit simultaneously
10, then the judgement control source of high/low level is exported to difference amplifier 2 by sky/load judgment circuit 10.
The measurement of battery " internal resistance --- capacity curve "：
When measuring accumulator capacity using " internal resistance --- capacity curve method ", it is necessary to which " internal resistance --- capacity is bent for accurate measurement
Line ", the model specification different its " internal resistance --- capacity curves " of battery is different, in " the electric discharge of measurement battery national standard
During characteristic curve, start in measurement untill " final discharging voltage " is reached, used per (10H discharge rates) every other hour " Gu
Its " internal resistance of direct current dynamic " is surveyed in fixed load sensor " use " direct current dynamic electric voltage declines internal resistance method ", until reaching " discharge off
Untill voltage ", it is " interior to draw two parameter function relation curve according to " internal resistance of direct current dynamic " corresponding to different capabilities and its
Resistance --- capacity curve ", achieve standby.
Functional characteristics：
4.1 can directly, conveniently, the parameters of accurate measurement battery, the parameter of measurement meets battery national standard.
4.2, which often survey once (including printing), only needs one minute.
4.3 free/underloading conversions, judge, make measurement easy to operate.
It is 4.4 portable：It is in light weight, small volume, it is adapted to without alternating current onsite application.
5th, the key technical indexes：
Working power：DC12V × 3.1AH, power consumption≤15W
Charge power supply：AC220V 50HZ power consumptions≤40W
Test index：
The specific embodiment of the present invention is these are only, is not intended to limit the invention, for those skilled in the art
For member, the present invention can have various modifications and variations.Any modification within the spirit and principles of the invention, being made,
Equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (9)
1. portable intelligent accumulator parameter method of testing, it is characterized in that step is as follows：
1) internal resistance method measurement accumulator internal resistance is declined using direct current dynamic electric voltage
According to battery national standard, the single-unit rated capacity battery of Pass Test condition is subjected to perseverance with defined discharge rate
Electricity is banished, Timing measurement voltage simultaneously draws the discharge characteristic curve for meeting battery national standard, while in " flash-over characteristic song
10~20 capacity points are averagely taken corresponding to line " in the range of battery maximum capacity to minimum capacity and use internal resistance volume test
Dead load sensor in device makes battery be under direct current dynamic transient impulsive discharge state, is gathered using single-chip microcomputer
Sky/load voltage and discharge current detection signal, direct current dynamic internal resistance is measured by multibyte floating point computing, according in capacity
Logarithmic relationship in whole excursion between accumulator internal resistance and electric current, determines direct current dynamic transient impulsive discharge electric current
Optimum value is at 1.8 times~2.2 times of discharge current corresponding to defined discharge rate, and determines that the resistance of discharge loop is consolidated
The resistance of fixed load, this optimum value make each capacity point of the battery on the corresponding discharge characteristic curve produce one enough
Stable internal resistance r greatly, while the voltage drop Δ μ of a sufficiently large stabilization is produced, now accurately measure the electromotive force of battery
E, discharge voltage V and discharge current I, internal resistance r, r=(E-V)/I=Δs μ/I of battery are measured；
2) internal resistance is utilized --- capacity curve method measures accumulator capacity
While the discharge characteristic curve is drawn, declined in each capacity point of discharge characteristic curve using direct current dynamic electric voltage
Internal resistance method uses dead load sensor, battery is measured cluster direct current dynamic under direct current dynamic transient impulsive discharge state
Internal resistance, using each capacity point to discharge characteristic curve and the cluster direct current dynamic internal resistance measured, draw out the storage of respective model
Internal resistance corresponding to battery --- capacity curve, this curve from capacity maximum to capacity minimum category in each capacity point have only
One of one is corresponding from the sufficiently large stable DC dynamic internal resistance for being minimal to maximum, and each capacity that above-mentioned two curve is corresponding
Point matches, and this internal resistance --- capacity curve is the standard of cubic content measurement；
3) due to its different internal resistance of battery model specification --- capacity curve is different, will be with tested electric power storage before capacity is measured
The internal resistance of the corresponding model specification in pond --- capacity curve is input in the eeprom memory of accumulator parameter tester,
Internal resistance method consolidating using the resistance corresponding with tested battery model specification is declined using direct current dynamic electric voltage when measuring capacity
Fixed load sensor, make to be tested in the direct current dynamic that battery measures battery under direct current dynamic transient impulsive discharge state
Resistance, then by accumulator parameter tester single-chip microcomputer and be stored in parameter tester internal resistance --- capacity curve is looked into
Meter is calculated, and obtains accumulator capacity.
2. portable intelligent accumulator parameter method of testing according to claim 1, it is characterized in that being tested according to different
Battery model specification, dead load in replaceable corresponding dead load sensor simultaneously pass through the corresponding electric power storage of input through keyboard
Pond model specification and detection date are in the eeprom memory being connected with single-chip microcomputer.
3. a kind of portable intelligent accumulator parameter tester, it is by internal resistance volume test device and discharge characteristic curve test dress
Two parts composition is put, it is characterized in that the internal resistance volume test device is included with internal resistance, capacity sampling terminal B and capacity sampling
Terminal C dead load sensor, difference amplifier, wave filter, A/D converter, single-chip microcomputer, voice warning circuit, liquid crystal
Show device, mini-printer, eeprom memory, sky/load judgment circuit and keyboard；The output being connected on dead load sensor
Signal wire exports sky/load voltage and discharge current detection signal, and is connected with differential amplifier inputs, while by single-chip microcomputer
Input control voltage enters sky/load judgment circuit, then defeated by the judgement voltage of sky/high/low level of load judgment circuit output
Entering to difference amplifier, filtered device, A/D converter are input to single-chip microcomputer and carry out sky/load judgment, data processing and calculating,
Electromotive force E, discharge voltage V and discharge current are measured, the internal resistance of battery is accurately measured, draws capacity according to tabling look-up, by liquid crystal
Display and mini-printer print every measured parameter；The working power of the tester, which uses, has power shortage protection, voltage stabilizing
The battery of current limliting automatic charging function；
The discharge characteristic curve test device, including by being connected on discharge characteristic curve calibrating terminal B` and discharge characteristic curve
Constant-current discharge circuit switching K2, tunable load displacement amount control device and parameter acquisition current/voltage between calibrating terminal C`
The constant-current discharge loop that converter is formed；Controlled by the preset voltage adjuster, voltage comparator, electric current lifting/lowering that are sequentially connected
The current constant control loop that device, stepless speed regulation stepper motor and decelerator are formed, put through the collection of parameter acquisition current/voltage converter
Magnitude of voltage after electric current value A/V conversions, carried out into voltage comparator with providing the preset voltage adjuster of preset voltage values
Compare, comparative result is received by electric current lifting/lowering controller, and make nothing to stepless speed regulation stepper motor input lifting/lowering control voltage
Level speed governing stepper motor produces forward or reverse, and being used to controlling after decelerator slows down can in tunable load displacement amount control device
Adjust the displacement of load and discharge loop resistance is increased or is subtracted, realize the constant of Automatic Control discharge current.
4. portable intelligent accumulator parameter tester according to claim 3, it is characterized in that the dead load senses
Device, including the switch matrix of longitudinal hole is opened up, insulation sleeve is installed with the longitudinal hole, insulation is installed in switch matrix side
Handle, opposite side are provided with insulator, are fixed with dead load on insulator, dead load one end is connected with switch matrix,
The other end is connected with connecting cable, and conductive lever is installed with insulation sleeve, passes through screw thread in an exit of conductive lever
Conductive knob is connected with, is allowed to be opened or closed with dead load, another exit of conductive lever is connected with connecting cable,
The exit of the connecting cable is connected with internal resistance, capacity sampling terminal B, capacity sampling terminal C, the output signal line point
Internal resistance, capacity sampling terminal B are not connected on, on capacity sampling terminal C, internal resistance, capacity sampling terminal B, capacity sampling terminal C difference
It is connected on accumulator anode and cathode connecting plate.
5. portable intelligent accumulator parameter tester according to claim 3, it is characterized in that the tunable load displacement
Amount control device, including bottom bracket, are set in parallel in two on bottom bracket loads, the stepless speed regulation stepper motor and
Decelerator is arranged on bottom bracket side, and leading screw is fixed with bottom bracket, and the other end and the decelerator of the leading screw export
End connection, is connected with screw on leading screw, and carbon brush, the other end of the carbon brush and two loads are connected with screw lower elastic
Sliding contact.
6. portable intelligent accumulator parameter tester according to claim 3, it is characterized in that the single-chip microcomputer uses
89C51 series high-performance single-chip microcomputers, A/D converter use and are based on high performance sigma-delta Sampling techniques and LC2Mos technologies
A/D7701 converters.
7. portable intelligent accumulator parameter tester according to claim 3, it is characterized in that the parameter acquisition electric current/
The precision of voltage changer is 10mA, and the precision of the preset voltage adjuster and voltage comparator is 1mv.
8. portable intelligent accumulator parameter tester according to claim 3, it is characterized in that the stepless speed regulation stepping
The revolution of motor is 45~90 revs/min；The decelerator is 6：1~10：The decelerator of 1 gearratio, the tunable load displacement
The displacement of amount control device is 5.8~6.2 millis m/min.
9. portable intelligent accumulator parameter tester according to claim 3, it is characterized in that the tunable load displacement
The temperature coefficient of load in amount control device is less than or equal to 0.0000051/ DEG C.
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| CN109031135A (en) * | 2018-06-22 | 2018-12-18 | 佛山市长郡科技有限公司 | A kind of rechargeable battery SOC estimation device |
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| CN115173535B (en) * | 2022-09-08 | 2023-01-24 | 苏州浪潮智能科技有限公司 | Discharge circuit of energy storage module, standby power capacity determination method and related components |
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