CN107728079A - A kind of photovoltaic energy storage battery rapid detection system - Google Patents

A kind of photovoltaic energy storage battery rapid detection system Download PDF

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Publication number
CN107728079A
CN107728079A CN201711212833.4A CN201711212833A CN107728079A CN 107728079 A CN107728079 A CN 107728079A CN 201711212833 A CN201711212833 A CN 201711212833A CN 107728079 A CN107728079 A CN 107728079A
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CN
China
Prior art keywords
circuit
storage battery
energy storage
photovoltaic energy
detection
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Application number
CN201711212833.4A
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Chinese (zh)
Inventor
措加旺姆
努桑
周易
胡贵军
晋亚铭
赵地
段杰
Original Assignee
西藏大学
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Application filed by 西藏大学 filed Critical 西藏大学
Priority to CN201711212833.4A priority Critical patent/CN107728079A/en
Publication of CN107728079A publication Critical patent/CN107728079A/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/385Arrangements for measuring battery or accumulator variables
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/389Measuring internal impedance, internal conductance or related variables

Abstract

The present invention discloses a kind of photovoltaic energy storage battery rapid detection system, including microcomputer apparatus and signal acquisition circuit, signal acquisition circuit includes voltage detecting circuit and internal resistance detection circuit, and the single-chip microcomputer in microcomputer apparatus electrically connects with voltage detecting circuit and internal resistance detection circuit and by the information transmission being collected into the computer in microcomputer apparatus.Photovoltaic energy storage battery rapid detection system in the present invention, the detection that photovoltaic energy storage battery can be failed, judge whether battery fails, and can carry out can the progress of repairing type and the failure of unrepairable type strictly judge and quantitative analysis that the reparation to energy-storage battery, which provides, repairs foundation.Staff is enabled to carry out failture evacuation for the different failure types of battery in time, so as to ensure the normal energy storage and operating of whole photovoltaic energy storage battery.

Description

A kind of photovoltaic energy storage battery rapid detection system

Technical field

The present invention relates to battery detecting technical field, more particularly to a kind of photovoltaic energy storage battery rapid detection system.

Background technology

The development and utilization of new energy is increasingly subject to widely pay close attention to, and especially photovoltaic generation achieves development at full speed. Energy-storage battery is more based on lead-acid accumulator used by photovoltaic generation, and the management of battery is excessively simple, for photovoltaic energy storage System be used for quickly detecting and evaluate majority be using it is sensibility understanding judged, not to energy storage can repairing type failure with The failure of unrepairable type strictly judge and quantitative analysis, virtually adds the cost of energy-storage system.

The content of the invention

It is an object of the invention to provide a kind of photovoltaic energy storage battery rapid detection system, exists to solve above-mentioned prior art The problem of, while being used for quickly detecting to photovoltaic energy storage system can also to energy-storage battery can repairing type fail with that can not repair Replica failure strictly judge and quantitative analysis, and the reparation to energy-storage battery, which provides, repairs foundation.

To achieve the above object, the invention provides following scheme:The present invention provides a kind of photovoltaic energy storage battery and quickly examined Examining system, including microcomputer apparatus and signal acquisition circuit, the signal acquisition circuit includes voltage detecting circuit and internal resistance is examined Slowdown monitoring circuit, the single-chip microcomputer in the microcomputer apparatus are electrically connected with the voltage detecting circuit and internal resistance detection circuit and will collected To information transmission give the microcomputer apparatus in computer.

Optionally, the internal resistance detection circuit uses internal resistance of cell measuring instrument.

Optionally, the voltage detecting circuit uses differential amplifier circuit, and the differential amplifier circuit includes a computing Amplifier and four resistance.

Optionally, voltage follower, the voltage follower and the differential amplification are also included in the detecting system Circuit connects.

Optionally, the voltage follower is also associated with an amplitude limiter circuit.

Optionally, the signal acquisition circuit also includes current detection circuit, and the current detection circuit uses Hall Current sensor, the voltage signal of the Hall current sensor output enter the voltage follower, last converted circuit It is connected with the single-chip microcomputer.

Optionally, the signal acquisition circuit also includes temperature sensing circuit, and the temperature sensing circuit is using numeral temperature Sensor is spent, the temperature sensing circuit is connected with the single-chip microcomputer signal.

Optionally, single band is also included in the detecting system and carries detection circuit, the band, which carries detection circuit, includes general-purpose Table and with carry electrical equipment.

The present invention achieves following technique effect relative to prior art:

Photovoltaic energy storage battery rapid detection system in the present invention, the detection that photovoltaic energy storage battery can be failed, Judge whether battery fails, and can carry out can the progress of repairing type and the failure of unrepairable type strictly judge and quantitative analysis, Reparation to energy-storage battery, which provides, repairs foundation.Staff is enabled to carry out event for the different failure types of battery in time Barrier excludes, so as to ensure the normal energy storage and operating of whole photovoltaic energy storage battery.

Brief description of the drawings

In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these accompanying drawings Obtain other accompanying drawings.

Fig. 1 is the process chart of photovoltaic energy storage battery rapid detection system in the present invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made Embodiment, belong to the scope of protection of the invention.

It is an object of the invention to provide a kind of photovoltaic energy storage battery rapid detection system, exists to solve above-mentioned prior art The problem of, while being used for quickly detecting to photovoltaic energy storage system can also to energy-storage battery can repairing type fail with that can not repair Replica failure strictly judge and quantitative analysis, and the reparation to energy-storage battery, which provides, repairs foundation.

Photovoltaic energy storage battery rapid detection system provided by the invention, including microcomputer apparatus and signal acquisition circuit, letter Number Acquisition Circuit includes voltage detecting circuit and internal resistance detection circuit, the single-chip microcomputer in microcomputer apparatus and voltage detecting circuit and Internal resistance detection circuit electrically connects and by the information transmission being collected into the computer in microcomputer apparatus.

Energy-storage battery is detected by the voltage detecting circuit in signal acquisition circuit and internal resistance detection circuit, judged Whether the voltage of energy-storage battery and internal resistance are in failure state, and judge battery according to shown magnitude of voltage and internal resistance value Failure degree, so as to which information be facilitated into computer by singlechip feedbsck, staff is monitored and judgement is handled.

In order to facilitate the understanding of the purposes, features and advantages of the present invention, it is below in conjunction with the accompanying drawings and specific real Applying mode, the present invention is further detailed explanation.

Fig. 1 is refer to, wherein, Fig. 1 is the process chart of photovoltaic energy storage battery rapid detection system in the present invention.

The failure mode of photovoltaic energy storage battery has a variety of, and the present invention is using conventional energy storage lead accumulator to study to lead The failure mode of battery mainly include dehydration, sulfation, pole plate softening, grid corrosion, short circuit, open circuit, thermal runaway, without antimony Situations such as effect, outward appearance expansion breakage and normal use reach battery.Some situations belong to can repairing type and have Then unrepairable.The present invention realizes that situation is tested and analyzed for above-mentioned concentration battery, can find the mistake of battery in time Imitate reason, and make corresponding countermeasure, for can the battery of repairing type give repairing and using in time, for unrepairable type Battery can then take timely replacing, not influence the normal work of whole group energy-storage battery.

Photovoltaic energy storage battery rapid detection system in the present invention, signal acquisition circuit therein include voltage detecting electricity Road, internal resistance detection circuit and temperature sensing circuit, pass through the need during the setting of foregoing circuit and combination battery detecting Failure degree detection is carried out to battery.

First, the both end voltage of energy-storage battery is detected by voltage detecting circuit, differential amplifier circuit is by two The difference of institute's plus signal is amplified on individual input, is re-used as the circuit of output.Basic differential amplifier circuit is by a computing Amplifier and four resistance are formed, and the circuit first order is differential amplifier circuit, and the second level is voltage follower, in order to anti-before output Voltage of only surging damages the A/D mouths of single-chip microcomputer, there is provided amplitude limiter circuit, according to requirement of the single-chip microcomputer for collection voltages, selection Suitable resistance is that the voltage detecting to energy-storage battery can be achieved.By voltage detecting circuit detect energy-storage battery voltage whether To failure voltage.

Then, to carrying out after overvoltage detection circuit detection and the voltage that is detected reaches the energy-storage battery of failure voltage Carry out internal resistance detection.

The failure of valve-control sealed accumulator such as grid corrosion and growth, loose contact, the reduction of active material available quantity etc. Concentrated expression is in the increase of cell resistance, the reduction of conductance, therefore, the height of resistance or conductance can provide reflection battery failures and The effective information of usage degree.

The metering system of internal resistance of cell measuring instrument is to inject one to battery cell or batteries with ac power generation Low frequency 20-30 hertz or 60 hertz of AC signal, measurement pass through the alternating current of battery and the alternating current at every battery both ends Pressure, then calculates I/U or Vac/lac ratios, then draws the conductance or resistance value of battery, and show this value.I.e. in battery Resistance measuring instrument is that battery injects an AC signal, the electric current for measuring the alternating voltage at battery both ends and passing through battery.If There is a certain amount of ripple voltage in batteries, in many cases, it is necessary to take off-line test or take measures to eliminate line Ripple.

Internal resistance detection is carried out to energy-storage battery by internal resistance detection circuit, judges whether the resistance of energy-storage battery reaches failure Value.

When the voltage and resistance of the energy-storage battery of detection are stale value, its failure cause is further judged, with And the failure cause for can repairing type failure or unrepairable type failure.

The judgement of energy-storage battery short circuit

If energy-storage battery is in series by dry battery, energy-storage battery short trouble refers to that both positive and negative polarity goes out in single battery Existing short circuit.Between the positive and negative pole plate for the superposition that intersects, not road child state must be kept under normal circumstances, could be electrolysed Potential difference is produced in liquid, forms electro-chemical reaction positive and negative electrode.Battery is during fabrication reduction volume, improves battery and is moved through Antivibration kinetic force in journey, positive/negative plate in the housing need to keep impaction state.If polar board surface is uneven during manufacture, there is projection Pimple, or assembling when press from both sides into larger sharp conductive materials, insulating barrier will be made to bear larger extruding force.Vibrating and making With under the double action of time lengthening, the positive/negative plate certain point of internal storage battery is directly connected to (equivalent in battery outer Both positive and negative polarity short circuit), the both positive and negative polarity active material of parallel connection is produced electrochemical discharge reaction, ultimately become lead sulfate, during charging without Method reduces.

According to battery condition, the terminal voltage numerical value of the existing battery of a single-shot is smaller 2V than other batteries all the time and its multiple When, you can confirm there is single battery short trouble occur in battery.

That causes the single failure of battery also has other reasonses, as charging or discharging current causes greatly plate buckling deformation to damage dividing plate Badly short-circuit (charging or discharging current causes plate buckling to deform greatly, active mass expansion, and come off accumulation short circuit, or pole plate workmanship is poor, Active material early fallout, accumulation short circuit), internal storage battery, which falls into conductive materials, makes internal storage battery short circuit etc..

Confirm the method for failure single lattice:Using the pole building terminal and liquid injection port of battery outer, pole stake is measured with voltmeter The magnitude of voltage of bus-bar in terminal and liquid injection port, you can find out failure single lattice.It is noted that distinguish contact is that positive pole converges during operation Stream row, or negative bus-bar.Positive bus surface generally there are PbO2Contact pilotage easy loose contact during measurement.Negative bus-bar Surface is Pb, and stylus contact measurement work is relatively easy.Therefore, the pole stake terminal of battery outer is selected to conflux with negative pole as far as possible Discharge into row.

Pair determination has conductive materials to fall into internal storage battery, can be inverted battery, conductive materials are fallen from liquid injection port Go out.To the battery of active material early fallout accumulation short trouble, though elimination sediment can be rinsed by filling electrolyte Method exclude, but the capacity of battery cell diminishes after being come off because of active material, and the performance parameter between each monomer is inconsistent, because This reparation has little significance.

The judgement of energy-storage battery open circuit (open circuit) failure

Inside energy-storage battery open fault refer to it is former can the loop of conducting electric current disconnect, make normal active material participate in filling The electrochemical reaction of electric discharge, electric current can not pass through.

Terminal voltage when being carried with a bulb and universal meter to single battery band checks.If no-voltage during with load, Then it is judged as that internal storage battery is opened a way.If open fault is at the terminal post of bus-bar and battery, it can be repaiied Multiple processing.First check whether opened a way at the resin embedding of terminal post, by cutting out the epoxy resin on surface at open circuit, more Change poles post or again welding lead, make battery restorability.If confirm open fault be by internal storage battery bus-bar across Weldering, through-wall welding etc. cause, then must change battery.

The judgement of polar plate sulfation

Sulfation failure is characterized in that the active material on pole plate is reduced, resistance is big, electrolyte relative density declines. By the terminal voltage inspection to the battery after full charge, can shortcoming energy-storage battery whether sulfation.If the storage after full charge The terminal voltage of energy battery is decreased obviously, then can determine whether that internal storage battery has produced polar plate sulfation.

For battery once there occurs sulfation, situation is less serious, can attempt to be repaired with hydrotherapy.

The judgement of thermal runaway

In charging process, the reaction of recombination in battery will produce substantial amounts of heat energy, due to the sealing structure of battery Make heat be not easy to shed, cause the too high failure of battery temperature rise.

By the digital temperature sensor in temperature sensing circuit, in order to reduce interference, connection uses twisted-pair feeder, by right The access of monobus, pass Temperature Quantity back single-chip microcomputer and judge and further display.

It should be noted that for the different failure types of energy-storage battery, targetedly detection means, this hair can be used No longer repeated one by one in bright embodiment, as long as the judging means being readily apparent that in this area for failure phenomenon, are belonged to It is readily apparent that what is set on the basis of the present invention, therefore, also within the scope of the present invention;In addition, closed in the present invention Specific measuring instrument selection in voltage detecting circuit, internal resistance detection circuit and temperature sensing circuit also can be according to actual need The replacing for carrying out model or species is asked, as long as corresponding detection demand can be met, is also fallen into protection scope of the present invention.

Specific case is applied in the present invention to be set forth the principle and embodiment of the present invention, above example Illustrate to be only intended to help the method and its core concept for understanding the present invention;Meanwhile for those of ordinary skill in the art, according to According to the thought of the present invention, in specific embodiments and applications there will be changes.In summary, this specification content It should not be construed as limiting the invention.

Claims (8)

  1. A kind of 1. photovoltaic energy storage battery rapid detection system, it is characterised in that:Including microcomputer apparatus and signal acquisition circuit, institute Stating signal acquisition circuit includes voltage detecting circuit and internal resistance detection circuit, the single-chip microcomputer in the microcomputer apparatus and the electricity Pressure detection circuit and the electrical connection of internal resistance detection circuit and the computer for giving the information transmission being collected into the microcomputer apparatus.
  2. 2. photovoltaic energy storage battery rapid detection system according to claim 1, it is characterised in that:The internal resistance detection circuit Using internal resistance of cell measuring instrument.
  3. 3. photovoltaic energy storage battery rapid detection system according to claim 1, it is characterised in that:The voltage detecting circuit Using differential amplifier circuit, the differential amplifier circuit includes an operational amplifier and four resistance.
  4. 4. photovoltaic energy storage battery rapid detection system according to claim 3, it is characterised in that:In the detecting system also Include voltage follower, the voltage follower is connected with the differential amplifier circuit.
  5. 5. photovoltaic energy storage battery rapid detection system according to claim 4, it is characterised in that:The voltage follower is also It is connected with an amplitude limiter circuit.
  6. 6. photovoltaic energy storage battery rapid detection system according to claim 5, it is characterised in that:The signal acquisition circuit Also include current detection circuit, the current detection circuit uses Hall current sensor, and the Hall current sensor is defeated The voltage signal gone out enters the voltage follower, and last converted circuit is connected with the single-chip microcomputer.
  7. 7. photovoltaic energy storage battery rapid detection system according to claim 1, it is characterised in that:The signal acquisition circuit Also include temperature sensing circuit, the temperature sensing circuit uses digital temperature sensor, the temperature sensing circuit with it is described Single-chip microcomputer signal connects.
  8. 8. photovoltaic energy storage battery rapid detection system according to claim 1, it is characterised in that:In the detecting system also Including single band load detection circuit, the band, which carries detection circuit, includes universal meter and with load electrical equipment.
CN201711212833.4A 2017-11-28 2017-11-28 A kind of photovoltaic energy storage battery rapid detection system CN107728079A (en)

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