CN104155609B - A kind of maintenance-free lead accumulator lossless detection method and nondestructive testing instrument - Google Patents
A kind of maintenance-free lead accumulator lossless detection method and nondestructive testing instrument Download PDFInfo
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Abstract
The invention discloses a kind of maintenance-free lead accumulator lossless detection method and nondestructive testing instrument, first pass through the internal resistance that constant-current discharge calculates mesuring battary, and compared with standard internal resistance, judged according to the charged state of comparative result and battery, if the battery without overcharge, need to carry out test judgement through overcharge again if its internal resistance is more than standard internal resistance.The detection method can be in the case where not dissecting battery, changed according to the voltage x current of period to judge the quality of battery, accurate judgement maintenance-free lead accumulator quality, improve the accuracy rate of detection, avoid causing a large amount of batteries to report by mistake and give up because judging inaccurate, there is its significant economic benefit and social benefit.The detector sets the charging circuit and discharge circuit controlled by controller, and the electric current and voltage during to by controlled rectification circuit to charging and discharging are adjusted, and meets test needs.
Description
Technical field
The present invention relates to a kind of maintenance-free lead accumulator lossless detection method and nondestructive testing instrument.
Background technology
The recoverable amount of current various vehicles is more and more, and China's various motor vehicles newly-increased every year are above in recent years
1000 ten thousand, 1 or 2 12V lead-acid accumulator is respectively arranged with above each car, wherein it is all maintenance-free lead acid electric power storage to account for more than 90%
Pond.If maintenance-free lead accumulator its quantity matched somebody with somebody plus electric car is quite huge.
And the detection of the open type conventional lead acid battery of early stage can be examined by observation, electric discharge, survey three kinds of modes of proportion
The quality of battery is looked into, its accuracy rate is at a relatively high.Because many situations can observe battery internal polar plate and electrolyte by liquid filling hole
Situation of change judges the situation of battery such as whether vulcanization, shedding etc..Combined with Radiotherapy ammeter can check welding to the of short duration electric discharge of battery
It is bad, single lattice short circuit, open circuit.Along with the change that can test electrolyte density judges the power shortage situation of battery, substantially 90%
Battery failures can be detected by the above method.
With advances in technology, environmentally friendly requirement, sealed maintenance-free battery using more and more extensive, liquid adding type it is common
Open type lead-acid accumulator is progressively eliminated.But the maximum feature of sealed maintenance-free lead-acid battery is sealing, by observing nothing
Method sees inside battery situation, can not also survey the proportion of electrolyte, only checks battery quality further through electric discharge, but due to it
Limitation, a lot of situations such as battery vulcanize, micro-short circuit, can not accurately judged phenomena such as shedding, cause a large amount of batteries to judge by accident, make this
The battery for use is useless by wrong report, causes a large amount of manpowers, material resources, the waste of financial resources.Sometimes for accurate judgement electric power storage
Pond quality, haves no alternative but cut on battery surface plastic materials shell, to observe its inner case, not only causes cell damage but also electricity
Electrolyte and lead inside pond can also cause greatly to pollute to environment.
It is a kind of quick in this case, how to work out at present, it is convenient, accurately judge that maintenance-free lead accumulator is good
Bad method, it appears become more and more important and urgently.
The content of the invention
It is an object of the invention to provide a kind of maintenance-free lead accumulator lossless detection method, to solve existing detection method
The problem of wasting of resources and pollution environment, while a kind of nondestructive testing instrument using this method is provided.
In order to realize the above object technical scheme bag used by maintenance-free lead accumulator lossless detection method of the present invention
Include following steps：
（1）The constant-current discharge of setting time and setting electric current is carried out to mesuring battary first, calculates the interior of mesuring battary
Hinder r；
（2）The internal resistance of cell and the charge condition of mesuring battary according to calculating are judged battery：As r ＜ r0,
R0 is standard internal resistance, judges the battery preferably battery；If mesuring battary is rechargeable battery, as r ＞ r0, the battery is judged
For bad battery；If mesuring battary is uncharged battery, as r ＞ r0, need to judge again after overcharge；
（3）The constant voltage and current limiting for carrying out setting time to the mesuring battary that need to be judged again after overcharge and setting voltage fills
Electricity, the charging current after being reached according to setting time are judged：If charging current is more than the electricity of setting after setting time
Stream threshold value then can determine that preferably battery, think that inside battery damages if current threshold of the charging current less than setting after setting time
It is bad.
The mesuring battary is 12V lead-acid accumulators.
The step（1）The setting time of middle constant-current discharge is 5 seconds, setting electric current 25A.
The step（3）The setting time of middle modified constant-voltage charge is 10min, sets voltage as 15V, current limit is
25A；The current threshold set is 20A.
The step（2）The calculating process of the Plays internal resistance of cell is as follows：To a new battery according to step（1）Method
Internal resistance is calculated, using 1.1 times of the new internal resistance of cell value as standard internal resistance.
Technical scheme is as follows used by maintenance-free lead accumulator nondestructive testing instrument of the present invention：Including controller and it is used for
The controlled rectification circuit being connected with power supply, the output end of the controllable flow circuit are used to connect and compose charging electricity with battery
Road, charging control switch is serially connected with charging circuit；The detector is also serially connected with discharge control switch and electric discharge electricity including one
The discharge circuit of resistance, voltage isolation detection circuit for detecting battery tension is connected with the controller and for detecting
The current sensor of electric current, the charging control switch, discharge control switch, current sensor and controlled rectification circuit with control
Device connection processed.
One group of switching tube for controlling discharge current, the control terminal of the switching tube are also associated with the discharge circuit
It is connected by drive circuit with controller.
The controlled rectification circuit includes the rectification circuit being sequentially connected with, the controllable semi-bridge inversion being made up of two switching tubes
Circuit, transformer and uncontrollable rectifier circuit.
The current sensor is current transformer, including the discharge current transformer and concatenation being serially connected in discharge circuit
Charging current transformer in the charge circuit.
The detector also includes being used for the reversed protection circuit being connected with battery, and the reversed protection circuit includes one
Optocoupler, the primary side of optocoupler are connected with battery, and the secondary both ends of optocoupler are connected with single-chip microcomputer and ground respectively.
The maintenance-free lead accumulator lossless detection method and nondestructive testing instrument of the present invention first passes through constant-current discharge and calculated
The internal resistance of mesuring battary, and compared with standard internal resistance, judged according to the charged state of comparative result and battery, if
Battery without overcharge, need to carry out test judgement through overcharge again if its internal resistance is more than standard internal resistance.The detection method can
In the case where not dissecting battery, to be changed according to the voltage x current of period to judge the quality of battery, accurate judgement is exempted to tie up
Lead-acid accumulator quality is protected, improves the accuracy rate of detection, avoids causing a large amount of batteries to report by mistake and give up because judging inaccurate, there is it
Significant economic benefit and social benefit.The detector sets the charging circuit and discharge circuit controlled by controller, to passing through
Electric current and voltage when controlled rectification circuit is to charging and discharging are adjusted, and meet test needs.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of the utility model detector embodiment；
The charge graph of Fig. 2 preferably batteries；
Fig. 3 is to have the battery charge graph slightly vulcanized；
Fig. 4 is the internal battery charge graph seriously vulcanized；
Fig. 5 is the charge graph of bad battery；
Fig. 6 is the bad battery charge graph of interior welds；
Fig. 7 is the schematic diagram of controlled rectification circuit；
Fig. 8 is the circuit theory diagrams of controller；
Fig. 9 is voltage isolation detection circuit schematic diagram；
Figure 10 is the first drive amplification circuit theory diagrams of half-bridge circuit；
Figure 11 is the second drive amplification circuit theory diagrams of half-bridge circuit；
Figure 12 is PWM controller schematic diagram；
Figure 13 A are the schematic diagram that reversed protection circuit correctly connects；
Schematic diagram when Figure 13 B are reversed protection circuit reversal connection；
Figure 14 is overload protecting circuit schematic diagram；
Figure 15 is auxiliary power circuit principle figure；
Figure 16 is that circuit connection schematic diagram is detected at four ends；
Figure 17 is switch driving circuit schematic diagram.
Embodiment
Below in conjunction with the accompanying drawings and the present invention is described further specific embodiment.
Maintenance-free lead accumulator lossless detection method of the present invention, comprises the following steps：
（1）The constant-current discharge of setting time and setting electric current is carried out to mesuring battary first, calculates the interior of mesuring battary
Hinder r:R=(Vo-V1)/I, wherein, Vo is voltage before electric discharge；V1 is voltage after electric discharge, and I is discharge current；
（2）The internal resistance of cell and the charge condition of mesuring battary according to calculating are judged battery：As r ＜ r0,
R0 is standard internal resistance, judges the battery preferably battery；If mesuring battary is rechargeable battery, as r ＞ r0, the battery is judged
For bad battery；If mesuring battary is uncharged battery, as r ＞ r0, need to judge again after overcharge；
The calculating process of internal resistance of standard cells is as follows：To a new battery according to step（1）Method calculate internal resistance, by this
1.1 times of new internal resistance of cell value are used as standard internal resistance.
（3）The constant voltage and current limiting for carrying out setting time to the mesuring battary that need to be judged again after overcharge and setting voltage fills
Electricity, the charging current after being reached according to setting time are judged：If charging current is more than the electricity of setting after setting time
Stream threshold value then can determine that preferably battery, think that inside battery damages if current threshold of the charging current less than setting after setting time
It is bad.
Mesuring battary illustrates by taking 12V lead-acid accumulators as an example in the present embodiment, and constant-voltage charge link is to the good of battery
Bad judgement is particularly important, by repetition test, combined circuit caloric value, determines step（1）The setting time of middle constant-current discharge
For 5 seconds, setting electric current 25A；Step（3）The setting time of middle modified constant-voltage charge is 10min, sets voltage as 15V, is limited
Electric current is 25A；The current threshold set is fully able to the requirement for meeting various battery detectings as 20A.If good battery power shortage
Then by 10 minutes 15V constant voltage and current limitings 25A charging, charging current at 10 minutes is 25A.
Battery in view of in the market is mostly used batteries, and some batteries may have vulcanization existing by battery caused by storage
As when plate vulcanizing, both inner pad surface can generate one layer of nonconducting lead sulfate crystallization, charging electric current ability to accept at initial stage
Can difference, internal resistance is very big during test but when charging after a few minutes as the progressively decomposition internal resistance of lead sulfate crystallization is progressively dropped
Low, charging current incrementally increases.The internal resistance of general good battery is exactly that power shortage is not more than 20 milliohms, charging current I=15/
0.02=750A, so if electric current without restriction is very big.Because being that electrochemical reaction can also be by temperature, particle during not overcharge
Factor including the dynamic internal resistance, concentration polarization resistance etc. of flowing influences, and general charging current is also not up to this value, but if
Battery power shortage charging current can also be more than 25A.Battery in view of in the market is all used battery, and every battery can all have
The factor such as oxidation, the slight vulcanization of both inner pad of certain difference such as pile crown, is set as 20A, not shadow by setting electric current threshold value
Ring the result of determination of battery.Although internal resistance very little but total overall reaction is lead sulfate to interior metal lead after abundance, thus not from
Son participates in reaction, and electric current will become very little.It is more than 20A, charged rear battery through the actual test charging current value of 10 minutes
Capacity is still greater than 80% normal capacity, that is to say, that if the battery for being more than standard internal resistance for test internal resistance is charged latter 10 points
Current value during clock, which is more than 20A, can judge preferably battery, it is charged after can normal use, otherwise can determine whether to scrap for battery
It should change.
The change of internal resistance is all descending to have two kinds to ask condition from the reaction on voltage in battery charging process：First, just
Normal battery power shortage, voltage changes from low to high during charging, is usually increased to 15V from 12V（Maintenance-free battery 15V constant pressures are filled
Electricity）, electric current is by being gradually decreased to greatly zero；Another kind is after battery has sulfation, such case charging voltage to be usually first high
It is low high again, undulate because there is the crystallization of one layer of lead sulfate when starting on pole plate, internal resistance is very big but after charging a few minutes with
The progressively decomposition internal resistance for lead sulfate crystallization gradually reduces, and charging voltage can also incrementally increase with reduction, charging current.Work as electricity
Drops to a certain extent when be that battery has reverted to normal battery, charging electricity when the crystallization of internal lead sulfate is decomposed to a certain extent
Pressure progressively will change from low to high.
Below by taking the 6-QW-68 type maintenance-free lead accumulators that actual test is crossed as an example, its main test process is as follows：
1. first carrying out 5S, 25A discharge test to the new battery after charged, electricity is calculated by formula r=(Vo-V1)/I
The standard internal resistance in pond, actual test are 4.6 milliohms, using 1.1 times of i.e. 5.1 milliohms of this internal resistance as standard internal resistance, through inner walkway
Battery less than this value is the good battery of full charge.
2nd, its internal resistance is calculated by carrying out constant-current discharge to mesuring battary, is judged by accident to reduce by 2 times of standard internal resistance i.e.
Boundary of 10.2 milliohms as bad battery, after internal resistance is charged less than the battery that the possibility of 2 times of standard internal resistances is power shortage after tested
Can be normal, if mesuring battary is rechargeable battery, it is determined as internal damage more than 2 times of standard internal resistances, can not repairs；Such as
Fruit mesuring battary is uncharged battery, and its internal resistance is more than standard internal resistance, then is judged by charging measurement.
Preferably the charging curve of battery, battery test the milliohm of internal resistance 6.5, after 10 minutes after 100% electric discharge as shown in Figure 2
Charging current 25A, illustrate battery power shortage, it is normal after charged.
The charging curve of the battery slightly vulcanized is illustrated in figure 3, it is 9 milliohms that it, which surveys internal resistance, between standard internal resistance
Between 2 times of standard internal resistances, but because it is uncharged battery, judge again after need are charged.It can be seen by charging curve
Go out, its charging voltage is gradually reduced by 15V, illustrates that internal resistance is gradually reducing, and charging current is 25A after 10 minutes, illustrates battery
Preferably battery can be repaired.
The charging curve that inside battery seriously vulcanizes is illustrated in figure 4, it surveys the milliohm of internal resistance 27, although more than 2 times marks
Quasi- internal resistance, but because it is uncharged battery, judge again after need are charged.It is by charging curve as can be seen that electric when charging
Stream gradually risen by 0, electric current 25A after 10 minutes, illustrate it is charged after can repair as normal battery.
The charging curve of bad battery is illustrated in figure 5, it is 16 milliohms that it, which surveys internal resistance, more than 2 times standard internal resistances, is carried out again
Charging measurement, by charging curve as can be seen that during charging electric current start it is big after to be reduced to below 3A rapidly be bad battery, say
Bright inside battery damage, can fill electricity.
It is illustrated in figure 6 the bad battery charging curve of interior welds, charging current is unstable during test, and it is bent charging occur
Line is jagged, then can be certainly bad battery, is mostly that internal rosin joint or pole plate are bad.
Foregoing provide the test case of limited battery, all sail 6-QW-68 types maintenance-free lead acid electric power storages of battery
Pond, by the actual test comparison of a large amount of batteries, above-mentioned method of testing judging nicety rate more than 95%.
Present invention also offers a kind of detector using above-mentioned battery lossless detection method, as shown in figure 1, including control
Device and the controlled rectification circuit for being connected with power supply, the output end of controllable flow circuit are used to connect and compose charging with battery
Circuit, charging control switch is serially connected with charging circuit；The detector is also serially connected with discharge control switch and electric discharge including one
The discharge circuit of resistance, voltage isolation detection circuit for detecting battery tension is connected with controller and for detecting electricity
The current sensor of stream, charging control switch J1, discharge control switch J2, current sensor and controlled rectification circuit with control
Device connects.
One group of switching tube being also associated with discharge circuit for controlling discharge current (is three Q1~Q3 in the present embodiment
（Model IRF65N06 metal-oxide-semiconductor）, it is certainly also different according to the available number of size of switching tube model and power), open
The control terminal for closing pipe passes through switch driving circuit（As shown in figure 17）It is connected with controller, controller output pwm signal is by opening
Close drive circuit control MOS switch pipe so that the constant current hold on discharge resistance.
The current sensor of the present embodiment uses high-precision hall DC current sensor, including is serially connected in discharge circuit
Discharge current sensor device and concatenation charging current sensor in the charge circuit, due to charging current and discharge current
The sense of current is different, error caused by order to reduce reversal link, improves accuracy of detection, therefore use two current senses
Device, sensor output 0-5V current signal are directly read in by the AD mouths of single-chip microcomputer.Certainly to reduce cost, one can also be used
Charging current can be surveyed or survey the directional current sensor of discharge current.
As shown in fig. 7, the controlled rectification circuit of the present embodiment uses the side of AC-DC-high-frequency ac-controllable direct current
Formula, including be sequentially connected with electromagnetic compatibility circuit, rectification circuit, the controllable half-bridge inversion circuit being made up of two switching tubes, change
Depressor and uncontrollable rectifier circuit, concrete principle are as follows：First by the 220V of power supply alternating voltage by being made up of L1-2, L1-2
Electromagnetic compatibility circuit is handled, then the voltage after processing is converted into 300V DC voltages, Ran Houjing by rectification circuit BR1
By the controllable half-bridge inversion circuit that switching tube Q1-5, Q1-6 are formed by the inversion of 300V DC voltages be high-frequency ac voltage after, then
Adjusted by transformer T, 300V high-frequency ac voltages are finally converted into 15V DC voltage to electric power storage by uncontrollable rectifier circuit
Charge in pond.
As shown in figure 8, the controller of the present embodiment uses STM32F103 single-chip microcomputers, the single-chip microcomputer is using ARM as kernel
Embedded 32 8-digit microcontroller, 64 pins, built-in 16 12 bit A/D converters, 6 PWM controllers, various interfaces are very abundant,
It is the very superior single-chip microcomputer of a performance.
The FMQ ends of single-chip microcomputer are also associated with the warning circuit being made up of BELL and controlling switch Q1；ADJ_MODE ends connect
There is display circuit DISPLY, the display circuit uses touching liquid-crystal display screen, and the data of single-chip microcomputer can be received by serial ports, also may be used
Single-chip microcomputer is sent instructions to by touch-screen, is controlled by single-chip microcomputer and adjusted the parameters such as charging voltage, charging current discharge current.
The single-chip microcomputer is used to gather the data such as cell voltage, electric current, battery temperature, and data are sent into LCDs and shown, simultaneously
Charging curve can also intuitively be shown；Data can also be sent to other equipment by RS485 or USB interface.In addition, the list
Piece machine, which also inputs to be connected with, is connected to charging, electric discharge, automatic three regulating keys.
The battery current detection of single-chip microcomputer shows that A_IN ends are connected with the A_IN terminals in Figure 12；Battery voltage detection is shown
Terminal V_IN is connected with the V_IN terminals in battery voltage detection circuit, and the other end of battery voltage detection is connected with VOUT+ ends,
The circuit is charger itself control signal, plays pre- pressure stabilization function.
As shown in fig. 7, rectification circuit BR1 output ends are provided with relay JDQ2, it is pre-charged for realizing, triode Q8 controls
JDQ2 coil control circuit, triode Q8 control terminal are connected in the respective terminal of single-chip microcomputer marked as AC JDQ；With
Charge relay JDQ1 is serially connected with the charging circuit of VOUT+ ends connection（That is charging control switch）, JDQ1 coil controls back
The control terminal DC_JDQ that triode Q7, Q7 are connected with road is connected to the DC_JDQ ends of single-chip microcomputer（As shown in Figure 8）, with control
JDQ1's cut-offs.
The voltage isolation detection circuit of the present embodiment is illustrated in figure 9, the circuit voltage input is connected with battery, its
Voltage output end is connected with single-chip microcomputer, is realized using isolation optocoupler HCNR200, and HCNR200 is a kind of high linearity simulated light
Electric coupler, there is a LED and two light-emitting diodes PD1, PD2, PD1 and amplifier U1 form feedback circuit
The light that monitoring LED is sent, the optical signal for exporting LED are more stable；After PD2 receives optical signal, by amplifier U2 reception
To electric current be converted to voltage signal.The circuit realiration is finely adjusted by controller to charger.
As shown in Figure 10~Figure 12, the controllable half-bridge inversion circuit being made up of switching tube Q1-5, Q1-6 passes through voltage-regulation
Drive circuit is connected with single-chip microcomputer, and concrete structure is as follows：As shown in figure 8, PWM the and PWM1 ends of single-chip microcomputer connect accordingly respectively
Drive amplification circuit, signal V_REF corresponding to output（As shown in Figure 10）And A_ADJ（As shown in figure 11）, V_REF and A_ADJ
It is connected to PWM controller U1（Model KA3525）Driving control signal DRV1 and DRV2 corresponding to output（Such as Figure 12 institutes
Show）, DRV1 and DRV2 pass through a driving transformer and switching tube Q1-5, Q1-6 of drive circuit control half-bridge circuit again（Such as
Shown in Fig. 7）.
As shown in figures 13 a and 13b, charger of the present utility model also includes a reversed protection circuit, the circuit bag
A resistance and the optocoupler G concatenated with it are included, optocoupler G primary side is connected with battery, secondary and single-chip microcomputer（DCFJJC ends）With
Ground is connected, and the primary side of optocoupler is also parallel with an electric capacity, and its control principle is as follows：When battery connection is correct, optocoupler G is not led
Logical, D points are high potential；When reverse connection of accumulator, optocoupler G conductings, D point current potentials are dragged down, and the reversed signal of optocoupler is passed to
Single-chip microcomputer, when single-chip microcomputer detects that battery is reversed, alarm is sent, and forbid charge relay to act.
It is the overload protecting circuit of the present embodiment as shown in figure 14, transformer T primary sides are provided with a mutual inductance for being used to protect
Device CT（As shown in Figure 7）, measurement result feeds back to YBDL terminals by DL and DL1（DL, DL1 export by diode rectifier bridge
To YBDL）, then it is connected to by triode Q2 PWM controller U1 SOFT_START ends.
As shown in figure 15, charger of the present utility model also includes an auxiliary power circuit, and the input of the circuit connects
Connect output terminals A C, AC1 of electromagnetic compatibility circuit, after the alternating current pressuring meridian rectification circuit of input, then pass through 4 tunnels and export transformation
Device is converted to the dc source of required all size, and the primary side of the transformer is connected with chopping switching tube a Q3, Q3
By pwm chip U5（Model UC3845）Control, to adjust original edge voltage.
As shown in figure 16, the input port for being used to detect voltage of the utility model single-chip microcomputer passes through voltage detecting line and inspection
The four ends detection circuit for surveying the current loading line separation of electric current individually enters battery voltage signal, that is, the electric current of charging is born
Carry line and voltage detecting line to separate, avoid the line pressure drop caused by the charging current on load line from influenceing the voltage at battery both ends and survey
Precision is tried, greatly improves the precision of output voltage, prevents charger from damaging battery because voltage is inaccurate.
If necessary to be detected to high-volume battery, more detectors can be connected by the CAN interface of respective single-chip microcomputer
Detection network is connected into, and the detection case of each battery can be monitored by a host computer, and by the data of every battery
Storage printing.
Maintenance-free lead accumulator is because its shell is sealing, therefore the quality of battery can not be found by visual examination
The failure of battery.Charger of the present utility model can judge that battery is good by observing the charging curve of battery on display screen
It is bad, check whether battery is internal and failure be present, this function is very useful for the new inside battery failure welding of procuratorial work, particularly
If automotive factory is by the bad battery entrucking of interior welds, it is likely that because electric current is larger during vehicle launch, inside battery
Sparking, causes battery explosion, this phenomenon occurred in certain car manufacturer.
The course of work and principle of detector of the present invention are as follows：
Battery is first connected, after turning on the power switch K, the parameter such as battery size, battery CCA values is inputted by touch-screen
Afterwards, " automatic test " button is pressed by single-chip microcomputer elder generation adhesive electric discharge relay J2, and passes through PWM by the discharge current of setting
The conducting state of controlling switch pipe makes the constant current hold on discharge resistance.Stop after electric discharge 5S, calculate the internal resistance of battery
Value, the battery voltage data that then will be measured, the internal resistance of cell, CCA values of battery etc. show that single-chip microcomputer passes through test in instrument
Internal resistance value be stored in inside corresponding battery size standard internal resistance relatively after, surveyed battery is divided into by discharge data：
Good battery, is surveyed again after needing rechargeable battery, and three kinds of bad battery is simultaneously shown.
For needing the battery surveyed again after charging, then single-chip microcomputer automatically opens up charge relay J1, and charging circuit work is single
Piece machine control charging circuit carries out modified constant-voltage charge by voltage, the electric current of setting, i.e. constant pressure 15V maximum currents 25A is to battery
Charging 10 minutes.The parameters such as charging curve, charging voltage, charging current are included on liquid crystal display, and according to charging curve and
The battery of 10 minutes charging current values less than 20A be bad battery, and the preferably battery that 10 minutes current values are more than 20A need to charge electricity
Two kinds of pond, and test result is shown.In automatic test mode test is automatically stopped if " automatic " key is pressed again.
Corresponding button can be pressed if only charge or discharge are needed and realizes only charging or only discharging function, presses change key then certainly again
It is dynamic to be stopped.
Claims (9)
1. a kind of maintenance-free lead accumulator lossless detection method, it is characterised in that comprise the following steps：
（1）The constant-current discharge of setting time and setting electric current is carried out to mesuring battary first, calculates the internal resistance r of mesuring battary：r
=(Vo-V1)/I, wherein, Vo is voltage before electric discharge；V1 is voltage after electric discharge, and I is discharge current；
（2）The internal resistance of cell and the charge condition of mesuring battary according to calculating are judged battery：As r ＜ r0, r0 is
Standard internal resistance, judge the battery preferably battery；If mesuring battary is rechargeable battery, as r ＞ r0, it is bad to judge the battery
Battery；If mesuring battary is uncharged battery, as r ＞ r0, need to judge again after overcharge；
（3）Setting time is carried out to the mesuring battary that need to be judged again after overcharge and sets the modified constant-voltage charge of voltage, root
Charging current after being reached according to setting time is judged：If charging current is more than the current threshold of setting after setting time
Preferably battery is then can determine that, thinks that inside battery damages if current threshold of the charging current less than setting after setting time.
2. maintenance-free lead accumulator lossless detection method according to claim 1, it is characterised in that：The mesuring battary
For 12V lead-acid accumulators.
3. maintenance-free lead accumulator lossless detection method according to claim 2, it is characterised in that：The step（1）
The setting time of middle constant-current discharge is 5 seconds, setting electric current 25A.
4. maintenance-free lead accumulator lossless detection method according to claim 2, it is characterised in that：The step（3）
The setting time of middle modified constant-voltage charge is 10min, sets voltage as 15V, current limit 25A；The current threshold set as
20A。
5. the maintenance-free lead accumulator lossless detection method according to Claims 1 to 4 any one, it is characterised in that：
The step（2）The calculating process of the Plays internal resistance of cell is as follows：To a new battery according to step（1）Method calculate in
Resistance, using 1.1 times of the new internal resistance of cell value as standard internal resistance.
A kind of 6. detector using maintenance-free lead accumulator lossless detection method as claimed in claim 1, it is characterised in that：
Including controller and the controlled rectification circuit for being connected with power supply, the output end of the controlled rectification circuit is used for and battery
Charging circuit is connected and composed, charging control switch is serially connected with charging circuit；The detector is also serially connected with electric discharge control including one
System switchs and the discharge circuit of discharge resistance, and the voltage isolation detection for detecting battery tension is connected with the controller
Circuit and the current sensor for detecting electric current, the charging control switch, discharge control switch, current sensor and controllable
Rectification circuit is connected with controller；The controlled rectification circuit include be sequentially connected with electromagnetic compatibility circuit, rectification circuit, by
Controllable half-bridge inversion circuit, transformer and the uncontrollable rectifier circuit that two switching tubes are formed；
When being tested automatically, the controller is carried out permanent by the discharge current of setting, the time control mesuring battary of setting
Electricity is banished, and calculates the internal resistance value of battery, passes through the standard of corresponding battery size of the internal resistance value of calculating with being stored in inside
After internal resistance relatively, surveyed battery is divided into by discharge data：Good battery, the battery surveyed again after need to charging, three kinds of bad battery, for
The battery surveyed again after need to charging, controller automatically control charging circuit and carry out modified constant-voltage charge by setting voltage, electric current, according to
Charging current after setting time reaches is judged：If current threshold of the charging current more than setting after setting time
Preferably battery is can determine that, thinks that inside battery damages if current threshold of the charging current less than setting after setting time.
7. detector according to claim 6, it is characterised in that：It is also associated with being used to control electric discharge in the discharge circuit
One group of switching tube of electric current, the control terminal of the switching tube are connected by drive circuit with controller.
8. detector according to claim 6, it is characterised in that：The current sensor is current transformer, including string
The charging current transformer of the discharge current transformer and concatenation being connected in discharge circuit in the charge circuit.
9. according to the detector described in claim 6~8 any one, it is characterised in that：The detector also includes being used for and storage
The reversed protection circuit of battery connection, the reversed protection circuit include an optocoupler, and the primary side of optocoupler is connected with battery, light
The secondary both ends of coupling are connected with single-chip microcomputer and ground respectively.
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| CN104459561B (en) * | 2015-01-05 | 2017-04-12 | 福州大学 | Method for measuring lead dendrite crystal short-circuiting of superfine glass fiber partition boards of lead-acid storage battery |
| CN105974324B (en) * | 2016-05-16 | 2019-01-18 | 天能电池集团有限公司 | A kind of detection method of AGM partition anti-short circuit capability |
| CN107238807A (en) * | 2017-08-02 | 2017-10-10 | 东华理工大学 | A kind of intelligent electric power parameter detection device |
| CN108649808A (en) * | 2018-06-13 | 2018-10-12 | 任志广 | High-voltage power module |
| CN113922494A (en) * | 2021-12-14 | 2022-01-11 | 广东电网有限责任公司佛山供电局 | Intelligent controller for detecting state of distribution network direct current screen and control method thereof |
| CN114994549A (en) * | 2022-08-08 | 2022-09-02 | 深圳市铂纳特斯自动化科技有限公司 | Exception handling method and battery detection system |
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