CN104155609A - Maintenance-free lead-acid storage battery nondestructive testing method and nondestructive testing instrument - Google Patents
Maintenance-free lead-acid storage battery nondestructive testing method and nondestructive testing instrument Download PDFInfo
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Abstract
The invention discloses a maintenance-free lead-acid storage battery nondestructive testing method and nondestructive testing instrument. Internal resistance of a battery under test is first calculated through constant current discharge, and is compared with standard internal resistance; determination is made based on a comparison result and a charging status of the battery; and if the battery is uncharged and the internal resistance thereof is greater than the standard internal resistance, then the battery should be tested and determined after being charged. By this testing method, the quality of a storage battery can be determined based on voltage and current variations in the period without dissection of the battery, the quality of a maintenance-free lead-acid storage battery can be determined accurately, the testing accuracy is improved, the scrapping of a large number of storage batteries due to incorrect determination is avoided, and economic and social benefits are significant. The testing instrument is provided with a charging circuit and a discharging circuit which are controlled by a controller, can be used for adjusting the current and voltage during charge and discharge through a controllable rectifier circuit, and meets testing 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 the annual newly-increased various motor vehicles of China all exceed 1,000 ten thousand in recent years, and each is all equipped with 1 or 2 12V lead-acid accumulator above car, and wherein accounting for more than 90% is all maintenance-free lead accumulator.If add that its quantity of maintenance-free lead accumulator that electric motor car joins is quite huge.
And the detection of the early stage common lead-acid battery of open type can check by observation, electric discharge, three kinds of modes of survey proportion the quality of battery, its accuracy rate is quite high.Because a lot of situations can be observed situation that the situation of change of battery internal polar plate and electrolytic solution judges battery as whether vulcanized by liquid filling hole, shedding etc.Combined with Radiotherapy ammeter, to the of short duration electric discharge of battery, can check out failure welding, and single lattice short circuit, opens circuit.Add the variation that can test electrolyte density and judge the power shortage situation of battery, 90% battery failures can detect by said method substantially.
Along with the progress of technology, the requirement of environmental protection, the application of enclosure-type maintenance-free battery is more and more extensive, and the common open type lead-acid accumulator of liquid adding type is progressively eliminated.But the maximum feature of enclosure-type maintenance-free lead-acid battery is sealing, cannot see inside battery situation by observing, also cannot survey the proportion of electrolytic solution, only check accumulator quality by electric discharge again, but due to its limitation, a lot of situations are vulcanized as battery, micro-short circuit, the phenomenons such as shedding cannot accurately be judged, cause a large amount of battery erroneous judgements, original operable battery is reported by mistake useless, caused a large amount of manpowers, material resources, the waste of financial resources.Sometimes in order accurately to judge accumulator quality, have no alternative but accumulator meter face plastic housing to cut, to observe its inner case, not only caused electrolytic solution and the lead of battery damage but also inside battery also can cause great pollution to environment.
At present in this case, how to work out fast a kind ofly, convenient, judge accurately the method for maintenance-free lead accumulator quality, seeming becomes more and more important and urgently.
Summary of the invention
The object of this invention is to provide a kind of maintenance-free lead accumulator lossless detection method, to solve the problem of the existing detection method wasting of resources and contaminated environment, provide a kind of nondestructive testing instrument that uses the method simultaneously.
In order to realize above object, the technical scheme that maintenance-free lead accumulator lossless detection method of the present invention adopts comprises the steps:
(1) first mesuring battary is carried out to setting-up time and the constant-current discharge of setting electric current, calculate the internal resistance r of mesuring battary;
(2) according to the internal resistance of cell calculating and the charge condition of mesuring battary, battery is judged: in the time of r < r0, r0 is standard internal resistance, judges that this battery is as good battery; If mesuring battary is rechargeable battery, in the time of r > r0, judge that this battery is as bad battery; If mesuring battary is uncharged battery, in the time of r > r0, need after overcharging, judge again;
(3) mesuring battary of need be after overcharging judging is again carried out to the modified constant-voltage charge of setting-up time and setting voltage, charging current after arriving according to setting-up time judges: if the current threshold that after setting-up time, charging current is greater than setting can be judged to be battery, if the current threshold that after setting-up time, charging current is less than setting thinks that inside battery damages.
Described mesuring battary is 12V lead-acid accumulator.
In described step (1), the setting-up time of constant-current discharge is 5 seconds, and setting electric current is 25A.
In described step (3), the setting-up time of modified constant-voltage charge is 10min, and setting voltage is 15V, and current limit is 25A; The current threshold of setting is 20A.
The computation process of described step (2) the Plays internal resistance of cell is as follows: a new battery is calculated to internal resistance according to the method for step (1), using 1.1 times of this new internal resistance of cell value as standard internal resistance.
The technical scheme that maintenance-free lead accumulator nondestructive testing instrument of the present invention adopts is as follows: comprise controller and controlled rectification circuit for being connected with power supply, the output terminal of described controllable flow circuit, for connecting and composing charging circuit with accumulator, is serially connected with charging control switch in charging circuit; This detector also comprises a discharge circuit that is serially connected with discharge control switch and discharge resistance, on described controller, be connected with for detection of the voltage isolation detection circuit of battery tension with for detection of the current sensor of electric current, described charging control switch, discharge control switch, current sensor and controlled rectification circuit are all connected with controller.
In described discharge circuit, be also connected with one group of switching tube for controlled discharge electric current, the control end of described switching tube is connected with controller by driving circuit.
Described controlled rectification circuit comprises in turn the rectification circuit connecting, the controlled half-bridge inversion circuit being made up of two switching tubes, transformer and control rectifying circuit not.
Described current sensor is current transformer, comprises the discharge current mutual inductor being serially connected in discharge circuit and is serially connected in the charging current mutual inductor in charging circuit.
This detector also comprises the anti-holding circuit that connects for being connected with accumulator, described in connect anti-holding circuit and comprise an optocoupler, the former limit of optocoupler is connected with accumulator, the secondary two ends of optocoupler are connected with ground with single-chip microcomputer respectively.
Maintenance-free lead accumulator lossless detection method of the present invention and nondestructive testing instrument first calculate the internal resistance of mesuring battary by constant-current discharge, and compare with standard internal resistance, judge according to the charged state of comparative result and battery, if without the battery overcharging, if being greater than standard internal resistance, its internal resistance needs to test through overcharging again judgement.This detection method can be in the situation that not dissecting battery, according to during electric current and voltage change to judge the quality of accumulator, accurately judge maintenance-free lead accumulator quality, improve the accuracy rate detecting, avoid causing a large amount of accumulators to give up because judging inaccurate wrong report by mistake, have its significant economic benefit and social benefit.This detector arranges charging circuit and the discharge circuit by controller control, to electric current and the voltage during to charging and electric discharge regulates by controlled rectification circuit, meets test needs.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of detector embodiment of the present invention;
Fig. 2 has been the charge graph of battery;
Fig. 3 is the battery charge graph that has slight sulfuration;
Fig. 4 is the battery charge graph of inner serious sulfuration;
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 principle figure;
Figure 13 A is the schematic diagram that connects anti-holding circuit exact connect ion;
Figure 13 B is the schematic diagram while connecing anti-holding circuit reversal connection;
Figure 14 is overload protecting circuit schematic diagram;
Figure 15 is auxiliary power circuit schematic diagram;
Figure 16 is four end testing circuit elementary diagrams;
Figure 17 is switch driving circuit schematic diagram.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the present invention is described further.
Maintenance-free lead accumulator lossless detection method of the present invention, comprises the steps:
(1) first mesuring battary is carried out to setting-up time and the constant-current discharge of setting electric current, calculate internal resistance r:r=(the Vo-V1)/I of mesuring battary, wherein, Vo is the front voltage of electric discharge; V1 is the rear voltage of electric discharge, and I is discharge current;
(2) according to the internal resistance of cell calculating and the charge condition of mesuring battary, battery is judged: in the time of r < r0, r0 is standard internal resistance, judges that this battery is as good battery; If mesuring battary is rechargeable battery, in the time of r > r0, judge that this battery is as bad battery; If mesuring battary is uncharged battery, in the time of r > r0, need after overcharging, judge again;
The computation process of internal resistance of standard cells is as follows: a new battery is calculated to internal resistance according to the method for step (1), using 1.1 times of this new internal resistance of cell value as standard internal resistance.
(3) mesuring battary of need be after overcharging judging is again carried out to the modified constant-voltage charge of setting-up time and setting voltage, charging current after arriving according to setting-up time judges: if the current threshold that after setting-up time, charging current is greater than setting can be judged to be battery, if the current threshold that after setting-up time, charging current is less than setting thinks that inside battery damages.
In the present embodiment, mesuring battary describes as an example of 12V lead-acid accumulator example, constant-voltage charge link is particularly important to the fine or not judgement of battery, through repetition test, and combined circuit thermal value, in determining step (1), the setting-up time of constant-current discharge is 5 seconds, and setting electric current is 25A; In step (3), the setting-up time of modified constant-voltage charge is 10min, and setting voltage is 15V, and current limit is 25A; The current threshold of setting is 20A, can meet the requirement of various battery detecting completely.If good battery power shortage passes through the charging of 10 minutes 15V constant voltage and current limiting 25A, the charging current 10 minutes time is 25A.
Consider that the battery on market is mostly used batteries, some battery may cause battery to have sulfation because depositing, in the time of plate vulcanizing, both inner pad surface can generate the nonconducting lead sulfate crystallization of one deck, charging initial stage electric current ability to accept difference to some extent, when test when the very large but charging of internal resistance after a few minutes along with the progressively decomposition internal resistance of lead sulfate crystallization progressively reduces, charging current progressively increases.The internal resistance power shortage of general good battery can not exceed 20 milliohms yet, and charging current I=15/0.02=750A, if therefore electric current without restriction is very large.While not overcharging, because be the dynamic internal resistance that electrochemical reaction also can be subject to temperature, particle flow, concentration polarization resistance etc. are in interior factor impact, and general charging current can not reach this value yet, if but battery power shortage charging current also can be greater than 25A.Consider that the battery on market is all used battery, every battery all can have certain difference as the oxidation of pile crown, and the factors such as the slight sulfuration of both inner pad, are set as 20A by setting current threshold, do not affect the result of determination of battery.Although after sufficient very little the but interior metal lead of internal resistance total overall reaction be lead sulfate, therefore do not have ion to participate in reaction, it is very little that electric current will become.Be greater than 20A through the reality test charging current value of 10 minutes, after charging, battery capacity is still greater than 80% normal capacity, if that is to say that the battery that is greater than standard internal resistance for test internal resistance current value 10 minutes time after charging is greater than 20A and can be judged as battery, after charging, can normally use, scrap and should change otherwise can be judged as battery.
In battery charging process, the variation of internal resistance is all descending, reaction from voltage has two kinds to ask condition: the one, and normal battery power shortage, when charging, voltage changes from low to high, is to be generally elevated to 15V(maintenance-free battery 15V constant-voltage charge from 12V), electric current is by being greatly progressively reduced to zero; Another kind is that battery has sulfation, this situation charging voltage is generally first high rear low high again, undulate, when being because starting, this on pole plate, has the crystallization of one deck lead sulfate, internal resistance very large but after charging a few minutes along with the progressively decomposition internal resistance of lead sulfate crystallization progressively reduces, charging voltage also can be along with reduction, and charging current progressively increases.When voltage drop when inner lead sulfate crystallization decomposes to a certain degree to a certain extent time battery reverted to normal battery, charging voltage will progressively change from low to high.
The 6-QW-68 type maintenance-free lead accumulator of testing taking reality is below example, and its main test process is as follows:
1. first the new battery after charged is carried out to 5S, 25A discharge test, calculate the standard internal resistance of battery by formula r=(Vo-V1)/I, actual test is 4.6 milliohms, using 1.1 times of this internal resistances, 5.1 milliohms are as standard internal resistance, and the battery that is less than this value through internal resistance test is fully charged good battery.
2, by being carried out to constant-current discharge, mesuring battary calculates its internal resistance, be the boundaries of 10.2 milliohms as bad battery in order to reduce erroneous judgement using 2 times of standard internal resistance, after tested internal resistance be less than 2 times of standard internal resistances may for the battery of power shortage can be normal after charging, if mesuring battary is rechargeable battery, what be greater than 2 times of standard internal resistances is judged to be internal damage, cannot repair; If mesuring battary is uncharged battery, and its internal resistance is greater than standard internal resistance, then judges by charging measurement.
Be illustrated in figure 2 the charging curve of battery, battery, after 100% electric discharge, is tested internal resistance 6.5 milliohms, and charging current 25A after 10 minutes, illustrates battery power shortage, normal after charging.
Be illustrated in figure 3 the charging curve of the battery of slight sulfuration, its actual measurement internal resistance is 9 milliohms, between standard internal resistance and 2 times of standard internal resistances, but because it is uncharged battery, need after charging, judge again.Can find out by charging curve, its charging voltage is progressively reduced by 15V, illustrates that internal resistance is progressively reducing, and after 10 minutes, charging current is 25A, illustrates that battery can repair as good battery.
Be illustrated in figure 4 the charging curve of the serious sulfuration of inside battery, its actual measurement internal resistance 27 milliohms although be greater than 2 times of standard internal resistances, because it is uncharged battery, need judge after charging again.Can find out by charging curve, when charging, electric current progressively rises by 0, and 10 minutes after-current 25A illustrate after charging and can repair as normal battery.
Be illustrated in figure 5 the charging curve of bad battery, its actual measurement internal resistance is 16 milliohms, is greater than 2 times of standard internal resistances, carried out again charging measurement, can find out by charging curve, when charging, to start to be reduced to rapidly 3A after large be bad battery to electric current below, illustrate that inside battery damages, and can fill electricity.
Be illustrated in figure 6 the bad battery charging curve of interior welds, when test, charging current is unstable, occurs that charging curve is jagged, can be bad battery certainly, mostly is inner rosin joint or pole plate bad.
The test case of limited battery is more than provided, and battery is all sail 6-QW-68 type maintenance-free lead accumulator, and through the actual test comparison of a large amount of batteries, above-mentioned method of testing judging nicety rate is more than 95%.
The present invention also provides a kind of detector that uses above-mentioned battery lossless detection method, as shown in Figure 1, comprise controller and controlled rectification circuit for being connected with power supply, the output terminal of controllable flow circuit, for connecting and composing charging circuit with accumulator, is serially connected with charging control switch in charging circuit; This detector also comprises a discharge circuit that is serially connected with discharge control switch and discharge resistance, on controller, be connected with for detection of the voltage isolation detection circuit of battery tension with for detection of the current sensor of electric current, charging control switch J1, discharge control switch J2, current sensor and controlled rectification circuit are all connected with controller.
In discharge circuit, be also connected with the one group of switching tube (the present embodiment is three metal-oxide-semiconductors that Q1～Q3(model is IRF65N06) for controlled discharge electric current, certainly also different according to the available number of the size of switching tube model and power), the control end of switching tube is connected with controller by switch driving circuit (as shown in figure 17), controller output pwm signal, by switch driving circuit control MOS switching tube, makes the electric current on discharge resistance keep constant.
The current sensor of the present embodiment adopts high-precision hall DC current sensor, comprise the discharge current sensor device being serially connected in discharge circuit and be serially connected in the charging current sensor in charging circuit, because the direction of current of charging current and discharge current is different, the error causing in order to reduce reversal link, improve accuracy of detection, therefore adopt two current sensors, the current signal of sensor output 0-5V is directly read in by the AD mouth of single-chip microcomputer.Certainly, for reducing costs, also can adopt the bidirectional current sensor that both can survey charging current and also can survey discharge current.
As shown in Figure 7, the controlled rectification circuit of the present embodiment adopts the mode of AC-DC-high-frequency ac-controlled direct current, comprise the electromagnetic compatibility circuit connecting in turn, rectification circuit, the controlled half-bridge inversion circuit being formed by two switching tubes, transformer and not control rectifying circuit, concrete principle is as follows: first the alternating voltage of the 220V of power supply is passed through by L1-2, the electromagnetic compatibility circuit of L1-2 composition is processed, again voltage after treatment is converted to 300V DC voltage through rectification circuit BR1, then via switching tube Q1-5, after the controlled half-bridge inversion circuit that Q1-6 forms is high-frequency ac voltage by the inversion of 300V DC voltage, regulate by transformer T again, finally charged a battery by the DC voltage that 300V high-frequency ac voltage is not converted to 15V by control rectifying circuit.
As shown in Figure 8, the controller of the present embodiment adopts STM32F103 single-chip microcomputer, and this single-chip microcomputer is embedded 32 8-digit microcontrollers taking ARM as kernel, 64 pins, built-in 16 12 bit A/D converters, 6 PWM controllers, various interface is very abundant, is the single-chip microcomputer that a performance is very superior.
The FMQ end of single-chip microcomputer is also connected with the warning circuit being made up of BELL and gauge tap Q1; ADJ_MODE end is connected with display circuit DISPLY, this display circuit adopts touching liquid-crystal display screen, the data that can receive by serial ports single-chip microcomputer, also can send instruction to single-chip microcomputer by touch-screen, by parameters such as Single-chip Controlling and adjusting charging voltage, charging current discharge currents.This single-chip microcomputer is used for gathering the data such as cell voltage, electric current, battery temperature, and data are delivered to LCDs demonstration, also can intuitively show charging curve simultaneously; Data can also be sent to other equipment by RS485 or USB interface.In addition, this single-chip microcomputer is also inputted to be connected with and is connected to charging, electric discharge, automatic three regulating keys.
The battery current detection display A_IN end of single-chip microcomputer is connected with the A_IN terminal in Figure 12; Battery voltage detection shows that terminal V_IN is connected with the V_IN terminal in battery voltage detection circuit, and the other end of battery voltage detection is connected with VOUT+ end, and this circuit is charging set self control signal, plays pre-pressure stabilization function.
As shown in Figure 7, rectification circuit BR1 output terminal is provided with relay J DQ2, and for realizing precharge, triode Q8 controls the coil control circuit of JDQ2, and the control end label of triode Q8 is AC JDQ, is connected in the respective terminal of single-chip microcomputer; Hold with VOUT+ that in the charging circuit being connected, to be serially connected with charge relay JDQ1(be charging control switch), in the coil control circuit of JDQ1, be connected with triode Q7, the control end DC_JDQ of Q7 is connected to the DC_JDQ end (as shown in Figure 8) of single-chip microcomputer, to control cut-offfing of JDQ1.
Be illustrated in figure 9 the voltage isolation detection circuit of the present embodiment, this circuit voltage input end is connected with accumulator, its voltage output end is connected with single-chip microcomputer, adopt isolation optocoupler HCNR200 to realize, HCNR200 is a kind of high linearity analog photoelectricity coupling mechanism, have a LED and two light-emitting diode PD1, PD2, the light that PD1 and amplifier U1 composition feedback circuit monitoring LED send, makes the light signal of LED output more stable; PD2 receives after light signal, is voltage signal by amplifier U2 the current conversion receiving.This circuit has been realized by controller charging set has been finely tuned.
As shown in Figure 10～Figure 12, by switching tube Q1-5, the controlled half-bridge inversion circuit that Q1-6 forms is connected with single-chip microcomputer by voltage-regulation driving circuit, concrete structure is as follows: as shown in Figure 8, the PWM of single-chip microcomputer is connected respectively corresponding drive amplification circuit with PWM1 end, export corresponding signal V_REF(as shown in figure 10) and A_ADJ(is as shown in figure 11), it is KA3525 that V_REF and A_ADJ are connected to PWM controller U1(model) export corresponding drive control signal DRV1 and DRV2(as shown in figure 12), DRV1 and DRV2 are again by the switching tube Q1-5 of a driving transformer and driving circuit control half-bridge circuit, Q1-6(as shown in Figure 7).
As shown in Figure 13 A and Figure 13 B, charging set of the present invention also comprises that connects an anti-holding circuit, this circuit comprises a resistance and the optocoupler G being connected in series with it, the former limit of optocoupler G is connected with accumulator, secondary and single-chip microcomputer (DCFJJC end) are connected with ground, and the former limit of optocoupler is also parallel with an electric capacity, and its control principle is as follows: when accumulator connects when correct, not conducting of optocoupler G, D point is noble potential; In the time of reverse connection of accumulator, optocoupler G conducting, D point current potential drags down, and optocoupler is connect to designature passes to single-chip microcomputer, connects inverse time when single-chip microcomputer detects accumulator, sends warning, and forbids charge relay action.
Be the overload protecting circuit of the present embodiment as shown in figure 14; the former limit of transformer T be provided with one for the protection of mutual inductor CT(as shown in Figure 7); measurement result feeds back to YBDL terminal (DL, DL1 output to YBDL through diode rectifier bridge) by DL and DL1, then is connected to the SOFT_START end of PWM controller U1 by triode Q2.
As shown in figure 15, charging set of the present invention also comprises an auxiliary power circuit, the input end of this circuit connects output terminals A C, the AC1 of electromagnetic compatibility circuit, after the alternating current pressuring meridian rectification circuit of input, be converted to again the direct supply of needed all size by No. 4 output transformers, the former limit of described transformer is connected with a chopping switching tube Q3, and Q3 is UC3845 by pwm chip U5(model) control, to regulate original edge voltage.
As shown in figure 16, the input port for detection of voltage of single-chip microcomputer of the present invention is inputted separately battery voltage signal by voltage detecting line with the four end testing circuits that the current loading line that detects electric current separates, namely the current loading line of charging and voltage detecting line are separated, avoid the voltage tester precision at the line pressure drop affects battery two ends that cause because of the charging current on load line, improve greatly the precision of output voltage, prevented that charging set from damaging battery because voltage is inaccurate.
If need to battery in enormous quantities be detected, can many detectors be connected into Sampling network by the CAN interface of single-chip microcomputer separately, and can be monitored the detection case of each battery by a host computer, and by the print data memory of every battery.
Maintenance-free lead accumulator is because its shell seals, and therefore the quality of battery cannot be found by visual examination the fault of battery.Charging set of the present invention can judge battery quality by the charging curve of observing accumulator on display screen, check whether inside exists fault to accumulator, this function for the new inside battery failure welding of procuratorial work of great use, if particularly automobile complete system plant is by battery entrucking bad interior welds, during probably because of vehicle launch, electric current is larger, inside battery sparking, causes battery explosion, and this phenomenon occurred in certain automobile production producer.
The course of work and the principle of detector of the present invention are as follows:
First connect battery, turn on the power switch after K, input battery size by touch-screen, after the parameters such as battery CCA value, press " test automatically " button by the first adhesive electric discharge of single-chip microcomputer relay J 2, and make the electric current on discharge resistance keep constant by the discharge current of setting by the conducting state of PWM gauge tap pipe.After electric discharge 5S, stop, calculate the internal resistance value of battery, then by the cell voltage data of measuring, the internal resistance of cell, the CCA value of battery etc. shows in instrument, the internal resistance value of single-chip microcomputer by test be stored in after the standard internal resistance relatively of inner corresponding battery size, by discharge data, surveyed battery is divided into: good battery, need to survey after rechargeable battery, three kinds, bad battery also shows again.
For the battery of surveying again after needs charging, single-chip microcomputer is opened charge relay J1 automatically, charging circuit work, and Single-chip Controlling charging circuit carries out modified constant-voltage charge by voltage, the electric current set, and constant voltage 15V maximum current 25A was to battery charging 10 minutes.By parameter displays such as charging curve, charging voltage, charging currents on liquid crystal display, and be bad battery according to the battery that charging curve and 10 minutes charging current values are less than 20A, what 10 minutes current values were greater than 20A needs two kinds of rechargeable batteries for good battery, and test result is shown.If again press " automatically " key in automatic test mode, automatically stop test.If only need charge or discharge, corresponding button be can press and only charging or only discharging function realized, again press and change key and automatically quit work.
Claims (10)
1. a maintenance-free lead accumulator lossless detection method, is characterized in that, comprises the steps:
(1) first mesuring battary is carried out to setting-up time and the constant-current discharge of setting electric current, calculate the internal resistance r of mesuring battary;
(2) according to the internal resistance of cell calculating and the charge condition of mesuring battary, battery is judged: in the time of r < r0, r0 is standard internal resistance, judges that this battery is as good battery; If mesuring battary is rechargeable battery, in the time of r > r0, judge that this battery is as bad battery; If mesuring battary is uncharged battery, in the time of r > r0, need after overcharging, judge again;
(3) mesuring battary of need be after overcharging judging is again carried out to the modified constant-voltage charge of setting-up time and setting voltage, charging current after arriving according to setting-up time judges: if the current threshold that after setting-up time, charging current is greater than setting can be judged to be battery, if the current threshold that after setting-up time, charging current is less than setting thinks that inside battery damages.
2. maintenance-free lead accumulator lossless detection method according to claim 1, is characterized in that: described mesuring battary is 12V lead-acid accumulator.
3. maintenance-free lead accumulator lossless detection method according to claim 2, is characterized in that: in described step (1), the setting-up time of constant-current discharge is 5 seconds, and setting electric current is 25A.
4. maintenance-free lead accumulator lossless detection method according to claim 2, is characterized in that: in described step (3), the setting-up time of modified constant-voltage charge is 10min, and setting voltage is 15V, and current limit is 25A; The current threshold of setting is 20A.
5. according to the maintenance-free lead accumulator lossless detection method described in claim 1～4 any one, it is characterized in that: the computation process of described step (2) the Plays internal resistance of cell is as follows: a new battery is calculated to internal resistance according to the method for step (1), using 1.1 times of this new internal resistance of cell value as standard internal resistance.
6. one kind uses the detector of maintenance-free lead accumulator lossless detection method as claimed in claim 1, it is characterized in that: comprise controller and controlled rectification circuit for being connected with power supply, the output terminal of described controllable flow circuit, for connecting and composing charging circuit with accumulator, is serially connected with charging control switch in charging circuit; This detector also comprises a discharge circuit that is serially connected with discharge control switch and discharge resistance, on described controller, be connected with for detection of the voltage isolation detection circuit of battery tension with for detection of the current sensor of electric current, described charging control switch, discharge control switch, current sensor and controlled rectification circuit are all connected with controller.
7. maintenance-free lead accumulator nondestructive testing instrument according to claim 6, is characterized in that: in described discharge circuit, be also connected with one group of switching tube for controlled discharge electric current, the control end of described switching tube is connected with controller by driving circuit.
8. maintenance-free lead accumulator nondestructive testing instrument according to claim 6, is characterized in that: described controlled rectification circuit comprises in turn the rectification circuit connecting, the controlled half-bridge inversion circuit being made up of two switching tubes, transformer and control rectifying circuit not.
9. maintenance-free lead accumulator nondestructive testing instrument according to claim 6, is characterized in that: described current sensor is current transformer, comprises the discharge current mutual inductor being serially connected in discharge circuit and is serially connected in the charging current mutual inductor in charging circuit.
10. according to the maintenance-free lead accumulator nondestructive testing instrument described in claim 6～9 any one; it is characterized in that: this detector also comprises the anti-holding circuit that connects for being connected with accumulator; describedly connect anti-holding circuit and comprise an optocoupler; the former limit of optocoupler is connected with accumulator, and the secondary two ends of optocoupler are connected with ground with single-chip microcomputer respectively.
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| CN104459561A (en) * | 2015-01-05 | 2015-03-25 | 福州大学 | Method for measuring lead dendrite crystal short-circuiting of superfine glass fiber partition boards of lead-acid storage battery |
| CN105974324A (en) * | 2016-05-16 | 2016-09-28 | 天能电池集团有限公司 | Method for detecting short-circuit resistance capability of AGM separator plate |
| CN107238807A (en) * | 2017-08-02 | 2017-10-10 | 东华理工大学 | A kind of intelligent electric power parameter detection device |
| CN109031144A (en) * | 2018-08-06 | 2018-12-18 | 保山牛能能源科技有限公司 | A kind of lithium ion battery detection circuit |
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| CN104459561A (en) * | 2015-01-05 | 2015-03-25 | 福州大学 | Method for measuring lead dendrite crystal short-circuiting of superfine glass fiber partition boards of lead-acid storage battery |
| 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 |
| CN105974324A (en) * | 2016-05-16 | 2016-09-28 | 天能电池集团有限公司 | Method for detecting short-circuit resistance capability of AGM separator plate |
| 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 |
| CN110138233A (en) * | 2018-06-13 | 2019-08-16 | 任志广 | High-voltage power module |
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| 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 |
| CN116494827A (en) * | 2023-06-28 | 2023-07-28 | 深圳市普兰斯通科技有限公司 | Lead-acid battery type identification method, identification device, electric vehicle and storage medium |
| CN116494827B (en) * | 2023-06-28 | 2023-08-18 | 深圳市普兰斯通科技有限公司 | Lead-acid battery type identification method, identification device, electric vehicle and storage medium |
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