CN106226704A - A kind of Wind turbines battery-detecting instrument - Google Patents
A kind of Wind turbines battery-detecting instrument Download PDFInfo
- Publication number
- CN106226704A CN106226704A CN201610738249.1A CN201610738249A CN106226704A CN 106226704 A CN106226704 A CN 106226704A CN 201610738249 A CN201610738249 A CN 201610738249A CN 106226704 A CN106226704 A CN 106226704A
- Authority
- CN
- China
- Prior art keywords
- module
- battery
- signal
- wind turbines
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/3644—Constructional arrangements
- G01R31/3648—Constructional arrangements comprising digital calculation means, e.g. for performing an algorithm
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/3644—Constructional arrangements
- G01R31/3646—Constructional arrangements for indicating electrical conditions or variables, e.g. visual or audible indicators
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
Abstract
A kind of Wind turbines battery-detecting instrument, selects module, preposition amplification bandpass filtering modules block, related operation module, integrator module, direct current amplification module, Single Chip Microcomputer (SCM) system module, exchange constant current signal generation circuit module, square wave conversion circuit, sample circuit, Keysheet module, display module and serial port module group including path.A kind of Wind turbines battery-detecting instrument that the present invention provides, the performance of single group or many group lead-acid accumulators can be tested, can accurately measure the terminal voltage of accumulator, internal resistance value and ambient temperature, can precisely judge that remaining battery capacity size and performance are good and bad, thus provide accumulator overall permanence evaluation.Detector of the present invention when carrying out detection without disconnecting accumulator the two poles of the earth, it is not necessary to accumulator being carried out discharge and recharge, it is not necessary to disconnect accumulator institute bringing onto load, using method step is simple, and measure the item is many, and result precision is high.
Description
Technical field
The invention belongs to battery technology field, particularly relate to a kind of wind-powered electricity generation group intelligent battery detector.
Background technology
Generally using lead-acid accumulator in Wind turbines, once lead-acid accumulator is aging or damages, will be to whole blower fan
The serious potential safety hazard that system is brought.By regularly lead-acid accumulator residual capacity and performance being detected, permissible
Find potential safety hazard as early as possible, thus the accident that is prevented effectively from occurs.Existing battery-detecting instrument often can only detect voltage, electricity
Deng, it is impossible to detect the information such as accumulator internal resistance, residual capacity, it is impossible to judge battery performance state.Particularly, during measurement often
Need to disconnect accumulator output, or need accumulator is carried out discharge and recharge, have impact on the properly functioning of rear end equipment.
Summary of the invention
It is an object of the invention to overcome the defect of prior art, it is provided that a kind of easy to use, wind-powered electricity generation that certainty of measurement is high
Unit battery-detecting instrument.
For achieving the above object, present invention employs following technical scheme:
A kind of Wind turbines battery-detecting instrument, including:
Path selects module, is used for selecting free battery signal or sample circuit signal, and exports to preposition amplification
Bandpass filtering modules block；
Preposition amplification bandpass filtering modules block, amplifies filtering for path selects the signal of module input carry out prime, goes
Noise in addition to passband and interference, and export to related operation module；
Related operation module, for realizing preposition amplification bandpass filtering modules block and square wave conversion circuit module input signal
Carry out coherent detection, and testing result is exported to integrator；
Integrator module, for related operation module output valve is integrated calculating, and exports to direct current amplification module；
Direct current amplification module, for integrator module output valve carries out direct current amplification, and exports to Single Chip Microcomputer (SCM) system mould
Block；
Single Chip Microcomputer (SCM) system module；For realizing processing the signal that direct current amplification module produces, and realize Keysheet module, show
The control showing module serial port module and exchange constant current signal generation circuit module；
Exchange constant current signal generation circuit module, is used for producing low-frequency ac signal, and exports to square wave conversion circuit, with
And sampled circuit exports to accumulator；
Square wave conversion circuit, for exchange constant current signal generation circuit module output signal is converted to reference signal, and
Output is to related operation module；
Sample circuit, uses exchange constant current signal generation circuit module output signal for realization, and exports extremely
Path selection switch module；
Keysheet module, display module and serial port module, be used for realizing man-machine interaction.
Further, described exchange constant current signal generation circuit module is by AD9833 sine-wave generator, bandwidth-limited circuit
Form with V/I translation circuit.
Further, described preposition amplification bandpass filtering modules block is made up of AD8221 amplifier and band filter.
Further, described related operation module includes AD630 balanced modulator.
Further, described direct current amplification module includes OP27 precision amplifier.
A kind of Wind turbines battery-detecting instrument that the present invention provides, can be to single group or the performance organizing lead-acid accumulator more
Test, can accurately measure the terminal voltage of accumulator, internal resistance value and ambient temperature, can precisely judge that accumulator residue is held
Amount size and performance are good and bad, thus provide accumulator overall permanence evaluation.Detector of the present invention when carrying out detection without
Disconnect accumulator the two poles of the earth, it is not necessary to accumulator is carried out discharge and recharge, it is not necessary to disconnect accumulator institute bringing onto load, the letter of using method step
Single, measure the item is many, and result precision is high.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention a kind of Wind turbines battery-detecting instrument；
Fig. 2 is one Wind turbines battery-detecting instrument another kind overall structure schematic diagram of the present invention；
Fig. 3 is the system composition structural representation of the present invention a kind of Wind turbines battery-detecting instrument；
Fig. 4 is the circuit structure of the stream constant current signal generation circuit module of the present invention a kind of Wind turbines battery-detecting instrument
Schematic diagram；
Fig. 5 is the circuit knot of the exchange constant current signal generation circuit module of the present invention a kind of Wind turbines battery-detecting instrument
Structure schematic diagram；
Fig. 6 is the electrical block diagram of the V/I translation circuit of the present invention a kind of Wind turbines battery-detecting instrument；
Fig. 7 is that the composition structure of the preposition amplification bandpass filtering modules block of the present invention a kind of Wind turbines battery-detecting instrument is shown
It is intended to；
Fig. 8 is the knot of the AD630 high accuracy balanced modulator that the present invention a kind of Wind turbines battery-detecting instrument is used
Structure schematic diagram；
Fig. 9 is a kind of circuit structure of related operation module；
Figure 10 is that the battery types of the present invention a kind of Wind turbines battery-detecting instrument selects interface schematic diagram；
Figure 11 is the test interface schematic diagram of the present invention a kind of Wind turbines battery-detecting instrument；
Figure 12 is the schematic flow sheet of the present invention a kind of lead-acid accumulator remaining capacity calculation method.
Detailed description of the invention
Below in conjunction with accompanying drawing 1 to 10, further illustrate being embodied as of the present invention a kind of Wind turbines battery-detecting instrument
Mode.One Wind turbines battery-detecting instrument of the present invention is not limited to the following description.
As depicted in figs. 1 and 2, it is the overall structure schematic diagram of the present invention a kind of Wind turbines battery-detecting instrument.This
Bright a kind of Wind turbines battery-detecting instrument includes housing 1, the switch 2, display screen 3, the test pen socket 4 that are located on housing, deposits
Card insert slot 7 and power inlet 5, the circuit structure being located in housing and supplying cell, and coordinate with test pen socket 4 and make
Test pen；Described circuit structure respectively with switch 2, display screen 3, test pen socket 4, storage card slot 7, power inlet
5 and supplying cell connected by circuit.
Described housing 1 is rectangular structure, and described display screen 3, switch 2 and test pen socket 4 are arranged at housing 1 area
On bigger facade 11；Described storage card slot 7 and power inlet 5 are arranged on the side elevation adjacent with facade 11.Described
Display screen 3 is touch screen, as human-computer interaction device, has both display and touch-input function simultaneously.Described storage card slot can
Think the one in SD card slot, TF card slot or USB slot, by inserting storage card, can realize recording measurement result, craft
The parameter information etc. arranged, and by storage card, relevant information can be copied to the miscellaneous equipments such as computer.The side elevation of housing 1
On be additionally provided with multiple for realizing multiple screws 6 that housing 1 is fixing.
Described test pen socket 4 is provided with two groups, and each test pen socket 4 is provided with two jacks 41；Wherein, one group of socket
Two jacks 41 of 4 are for even accumulator the two poles of the earth, it is provided that constant current AC signal exports；Two jacks 41 of another group socket 4 are used
In even accumulator the two poles of the earth, gather accumulator feedback signal under constant current AC signal encourages.Described test pen is by test pen bag
Including plug and clip, linked together by flexible circuit conductor, described test pen plug can be inserted in the jack 41 of test pen socket 4,
Realize clip and the electrical connection of housing 1 internal circuit configuration.Described test pen is provided with 4, and during use, each test pen inserts one
The jack 41 of individual pen socket 4.
As it is shown on figure 3, be the system composition structural representation of the present invention a kind of Wind turbines battery-detecting instrument.System master
Module, preposition amplification bandpass filtering modules block, related operation module, integrator module, direct current amplification module, list is selected by path
Sheet machine system module, exchange constant current signal generation circuit module, square wave conversion circuit, sample circuit, Keysheet module, display module
Forming with serial port module, the major function of each module is as follows:
Path selects module, is used for selecting free battery signal or sample circuit signal, and exports to preposition amplification
Bandpass filtering modules block；
Preposition amplification bandpass filtering modules block, amplifies filtering for path selects the signal of module input carry out prime, goes
Noise in addition to passband and interference, and export to related operation module；
Related operation module, for realizing preposition amplification bandpass filtering modules block and square wave conversion circuit module input signal
Carry out coherent detection, and testing result is exported to integrator；
Integrator module, for related operation module output valve is integrated calculating, and exports to direct current amplification module；
Direct current amplification module, for integrator module output valve carries out direct current amplification, and exports to Single Chip Microcomputer (SCM) system mould
Block；
Single Chip Microcomputer (SCM) system module, for realizing processing the signal that direct current amplification module produces, and realizes Keysheet module, shows
The control showing module serial port module and exchange constant current signal generation circuit module；
Exchange constant current signal generation circuit module, is used for producing low-frequency ac signal, and exports to square wave conversion circuit, with
And sampled circuit exports to accumulator；
Square wave conversion circuit, for exchange constant current signal generation circuit module output signal is converted to reference signal, and
Output is to related operation module；
Sample circuit, samples to exchange constant current signal generation circuit module output signal for realization, and exports extremely
Path selection switch module；
Keysheet module, display module and serial port module, be used for realizing man-machine interaction.
The key technology of the present invention is the detection technique of small-signal, the most how to process front end signal, thus
Accurately from noise, extract required useful small-signal accurately.And the ADC conversion of rear end and singlechip control part skill
Art is the most ripe, and Back end data collecting part is no longer done and specifically repeats by this programme.Due to detected internal resistance of cell signal very
Faint, and noise and interference are very strong, so detected signal should be amplified with Filtering Processing to filter beyond passband
Noise and interference.The present invention uses phase lock amplifying technology, has the strongest noise inhibiting ability, can be being imbedded in noise
Signal effectively extracts.Meanwhile, use four lead-in wire connection methods, can effectively reduce the conductor impedance impact on the internal resistance of cell.
As shown in Figure 4, stream constant current signal generation circuit module is by AD9833 sine-wave generator, bandwidth-limited circuit and V/
I translation circuit forms, and its function is to provide a kind of constant-current source with stable constant current signal to battery to be detected, is to ensure that internal resistance
Certainty of measurement and reproducible important guarantee.The design of now traditional in market low-frequency ac signal generator also exists a lot
Deficiency, such as, applying universal circuit when, if components and parts are more when using, the especially volume of electric capacity is big, and ripple
The poor stability of shape, distortion greatly, regulate the most extremely inconvenient.The present invention uses high accuracy DDS signal source AD9833 to produce to electric power storage
The low-frequency ac signal of the constant frequency that pond is injected, by the rule of four lead-in wire connection methods, accurately can go out accumulator by computation and measurement
The size of internal resistance.This module has that frequency switching time is short, opposite band is wide, resolution is high, the change of PLC technology, phase place even
The advantage such as continuous, low in energy consumption, reliability is high, be easily integrated.
As it is shown in figure 5, be that the present invention exchanges in constant current signal generation circuit module, a kind of circuit of bandwidth-limited circuit
Figure.The DC component of AD9833 output waveform is 300mV, and peak-to-peak value is the sine wave of 600mV.By bandwidth-limited circuit, filter
Except the higher harmonic component contained in DC component, and sine wave.The voltage gain of bandwidth-limited circuit described in the present embodiment
It is 0.5.
As shown in Figure 6, it is that the present invention exchanges in constant current signal generation circuit module, a kind of circuit diagram of V/I translation circuit.
AD9833 in embodiment occurs as constant-current source, and AD9833 to be made constitutes constant-current source, then need to be converted by V/I, full
Foot Howland current pump principle.In circuit shown in Fig. 4:
As it is shown in fig. 7, preposition amplification bandpass filtering modules block is made up of AD8221 amplifier and band filter.Due to from electricity
The signal that the two poles of the earth, pond collect is the faintest, so prime must first be carried out amplify filtering, then delivers in related operation module.Letter
Number after AD8221 amplifies, it is that 1KHz disturbs ripple signal and is amplified to mid frequency by band filter, is transported to be correlated with
Computing module signal input part.
DC amplification circuit module uses accurate amplifier OP27 to realize.
Integrator module, for related operation module output valve is integrated calculating, and exports to direct current amplification module.
Related operation module is for realizing preposition amplification bandpass filtering modules block and square wave conversion circuit module input signal
Carry out coherent detection, and testing result is exported to integrator.The AD630 that correlator computing module uses AD company to produce is high-precision
Degree balanced modulator.
As shown in Figure 8, it is AD630 internal structure schematic diagram.Its internal resistance is the SiCr film resistor of high stability,
May insure that accuracy and the stability of its work.The signal processing applications of AD630 includes balanced modulation and demodulation, synchronization inspection
Survey, phase-detection, orthogonal detection, phase-sensitive detection, locking amplification and square wave multiplication etc..The present invention use AD630 as multiplication
Device, it is achieved correlation detecting circuit.
As it is shown in figure 9, be a kind of circuit structure of related operation module of the present invention, its work process is: AMP A and AMP
B is respectively configured as non-inverting amplifier and inverting amplifier, and input signal is a road signal to be detected and a road reference signal；To be checked
Survey signal and be separately input into comparison amplifier by 1 foot, reference signal by 9 feet；Signal to be detected at device inside according to load
The positive and negative of ripple signal overturns, thus realizes switching multiplication function.
As shown in figure 12, one Wind turbines battery-detecting instrument of the present invention, adopt and calculate lead-acid accumulator with the following method
Residual capacity, comprises the following steps:
(1) described lead-acid accumulator actual internal resistance R is measuredSurvey；
(2) described lead-acid accumulator internal resistance ratio R is calculatedRatio:
RRatio=RSurvey/RMark；
Wherein, RMarkStandard internal resistance for lead-acid accumulator；
(3) residual capacity C of described lead-acid accumulator is calculated:
Work as RRatio< when 1.2, capacity C=100；
As 1.2≤RRatio< when 2.0, capacity C=100-(RRatio-1.2)/0.8*20.0；
As 2.0≤RRatio< when 5.0, capacity C=80-(RRatio-2.0)/3.0*50.0；
As 5.0≤RRatio< when 10.0, capacity C=30-(RRatio-5.0)/10.0*30.0；
As 10.0≤RRatioTime, capacity C=0.
Different with electric pressure according to capacity of lead acid battery to be measured, the standard internal resistance R of lead-acid accumulatorMarkValue such as
Under:
The lead-acid accumulator of unlisted capacitance grade, its standard internal resistance RMarkImmediate upper and lower two of its capacity can be passed through
The accumulator standard internal resistance of capacity specifications, is drawn by the manual calculation of fitting a straight line ratio by measure.
The operating procedure of the present invention a kind of Wind turbines battery-detecting instrument is as follows:
(1) opening switch 2 to start this equipment, equipment will automatically carry out self-inspection and returns to zero；Thereafter automatically enter test circle
Face；
(2) click on " set " button by display screen 3, enter battery types and select interface, select the capacity of battery, electricity
Pressure, clicks on " determination " and returns test interface afterwards；Battery types selects a kind of display mode at interface as shown in Figure 10；
(3) equipment test interface top display current environmental temperature, and supplying cell electricity.Click on " test " button,
Equipment is tested automatically；After having tested；The information such as test interface the display internal resistance of battery, voltage, capacity；Test interface
A kind of display mode is as shown in figure 11；
(4) when supplying cell electricity deficiency, charged for supplying cell by power inlet 5.
A kind of Wind turbines battery-detecting instrument that the present invention provides, can be to single group or the performance organizing lead-acid accumulator more
Test, can accurately measure the terminal voltage of accumulator, internal resistance value and ambient temperature, can precisely judge that accumulator residue is held
Amount size and performance are good and bad, thus provide accumulator overall permanence evaluation.Detector of the present invention when carrying out detection without
Disconnect accumulator the two poles of the earth, it is not necessary to accumulator is carried out discharge and recharge, it is not necessary to disconnect accumulator institute bringing onto load, the letter of using method step
Single, measure the item is many, and result precision is high.
Above content is to combine concrete preferred implementation further description made for the present invention, it is impossible to assert
Being embodied as of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of present inventive concept, it is also possible to make some simple deduction or replace, all should be considered as belonging to the present invention's
Protection domain.
Claims (5)
1. a Wind turbines battery-detecting instrument, it is characterised in that: including:
Path selects module, is used for selecting free battery signal or sample circuit signal, and exports to preposition amplification band logical
Filtration module；
Preposition amplification bandpass filtering modules block, amplifies filtering for path selects the signal of module input carry out prime, removes logical
Noise beyond band and interference, and export to related operation module；
Related operation module, is carried out preposition amplification bandpass filtering modules block and square wave conversion circuit module input signal for realization
Coherent detection, and testing result is exported to integrator；
Integrator module, for related operation module output valve is integrated calculating, and exports to direct current amplification module；
Direct current amplification module, for integrator module output valve carries out direct current amplification, and exports to Single Chip Microcomputer (SCM) system module；
Single Chip Microcomputer (SCM) system module；For realizing processing the signal that direct current amplification module produces, and realize Keysheet module, display mould
Block serial port module and the control exchanging constant current signal generation circuit module；
Exchange constant current signal generation circuit module, is used for producing low-frequency ac signal, and exports to square wave conversion circuit, Yi Jijing
Sample circuit exports to accumulator；
Square wave conversion circuit, for exchange constant current signal generation circuit module output signal is converted to reference signal, and exports
To related operation module；
Sample circuit, uses exchange constant current signal generation circuit module output signal for realization, and exports to path
Select switch module；
Keysheet module, display module and serial port module, be used for realizing man-machine interaction.
Wind turbines battery-detecting instrument the most according to claim 1, it is characterised in that: described exchange constant current signal occurs
Circuit module is made up of AD9833 sine-wave generator, bandwidth-limited circuit and V/I translation circuit.
Wind turbines battery-detecting instrument the most according to claim 1, it is characterised in that: described preposition amplification bandpass filtering
Module is made up of AD8221 amplifier and band filter.
Wind turbines battery-detecting instrument the most according to claim 1, it is characterised in that: described related operation module includes
AD630 balanced modulator.
Wind turbines battery-detecting instrument the most according to claim 1, it is characterised in that: described direct current amplification module includes
OP27 precision amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610738249.1A CN106226704A (en) | 2016-08-26 | 2016-08-26 | A kind of Wind turbines battery-detecting instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610738249.1A CN106226704A (en) | 2016-08-26 | 2016-08-26 | A kind of Wind turbines battery-detecting instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106226704A true CN106226704A (en) | 2016-12-14 |
Family
ID=57556088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610738249.1A Pending CN106226704A (en) | 2016-08-26 | 2016-08-26 | A kind of Wind turbines battery-detecting instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106226704A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107422273A (en) * | 2017-07-07 | 2017-12-01 | 山东汉格威智能技术有限公司 | A kind of accumulator cell essential resistance on-line measurement circuit |
| CN110376438A (en) * | 2019-08-06 | 2019-10-25 | 黑龙江省计量检定测试研究院 | Internal resistance of power lithium battery detection device and its detection method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101738584A (en) * | 2008-11-11 | 2010-06-16 | 河南省科学院应用物理研究所有限公司 | Measuring method of micro internal resistance of industrial storage battery |
| CN202524121U (en) * | 2012-03-30 | 2012-11-07 | 青岛艾迪森科技有限公司 | Intelligent battery management system |
| KR101268942B1 (en) * | 2013-03-29 | 2013-05-29 | 주식회사 제파텍 | Measuring circuit for internal resistance of battery or cell |
| CN203299350U (en) * | 2013-05-08 | 2013-11-20 | 山西大学 | Battery internal resistance on-line measuring instrument |
| CN103545568A (en) * | 2013-10-28 | 2014-01-29 | 青岛艾迪森科技有限公司 | Maintenance-free battery |
| CN203786207U (en) * | 2014-03-12 | 2014-08-20 | 上海电力学院 | Online internal resistance measuring device for storage battery |
-
2016
- 2016-08-26 CN CN201610738249.1A patent/CN106226704A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101738584A (en) * | 2008-11-11 | 2010-06-16 | 河南省科学院应用物理研究所有限公司 | Measuring method of micro internal resistance of industrial storage battery |
| CN202524121U (en) * | 2012-03-30 | 2012-11-07 | 青岛艾迪森科技有限公司 | Intelligent battery management system |
| KR101268942B1 (en) * | 2013-03-29 | 2013-05-29 | 주식회사 제파텍 | Measuring circuit for internal resistance of battery or cell |
| CN203299350U (en) * | 2013-05-08 | 2013-11-20 | 山西大学 | Battery internal resistance on-line measuring instrument |
| CN103545568A (en) * | 2013-10-28 | 2014-01-29 | 青岛艾迪森科技有限公司 | Maintenance-free battery |
| CN203786207U (en) * | 2014-03-12 | 2014-08-20 | 上海电力学院 | Online internal resistance measuring device for storage battery |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107422273A (en) * | 2017-07-07 | 2017-12-01 | 山东汉格威智能技术有限公司 | A kind of accumulator cell essential resistance on-line measurement circuit |
| CN110376438A (en) * | 2019-08-06 | 2019-10-25 | 黑龙江省计量检定测试研究院 | Internal resistance of power lithium battery detection device and its detection method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101482602A (en) | Detection analysis system of relay-protection tester | |
| CN105911420A (en) | Algorithm for automatically identifying 192 three-phase three-wire electric energy meter wiring modes | |
| EP3779475B1 (en) | Insulation detection circuit and insulation detection method | |
| CN108680834A (en) | A kind of detection method of the transformer insulation state based on PDC | |
| CN204302347U (en) | Microcomputer-recognized intelligent universal meter | |
| CN204166118U (en) | A kind of lightning arrester on-line computing model performance calibration equipment on the spot | |
| CN106226704A (en) | A kind of Wind turbines battery-detecting instrument | |
| CN203502555U (en) | Electrical characteristic detecting device for multifunctional high-voltage circuit breaker | |
| CN201364364Y (en) | Internal resistance tester | |
| CN106291385A (en) | A kind of lead-acid accumulator remaining capacity calculation method | |
| CN208399622U (en) | A kind of power utility check instrument for checking low-voltage power line leakage point of electricity | |
| CN103312561A (en) | Detection method for intelligent concentrator | |
| CN206020626U (en) | A kind of analysing valve control type lead-acid accumulator battery detection means | |
| CN206710567U (en) | Portable multi-function lithium battery group detection case | |
| CN206594214U (en) | Transient electric field and electromagnetic field attack detecting circuit and its electric energy meter being made | |
| CN202177674U (en) | Intelligent testing apparatus used for cabinet air conditioner half-practicality imitation test system | |
| CN201319063Y (en) | Detecting and analyzing device of relay protection testing device | |
| CN202939297U (en) | Verification system for ground resistance tester | |
| CN204439820U (en) | Once-through type lightning arrester on-Line Monitor Device detector | |
| CN204439819U (en) | AC type lightning arrester on-Line Monitor Device detector | |
| CN205920211U (en) | Portable capacitive on -line monitoring sensor tester | |
| CN102043085B (en) | Ultrahigh voltage power grid and current on-load detector | |
| CN104459451A (en) | Transformer current mutual inductor polarity tester and testing method | |
| CN205193134U (en) | Measuring apparatu based on measure human contact current and terminal volume of discharging | |
| CN103063928B (en) | System for testing earth grounding resistance, and digital coherent detection method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161214 |
|
| RJ01 | Rejection of invention patent application after publication |