CN203942310U - A kind of mining high-capacity lead-acid storage battery intelligent charger control system - Google Patents

Abstract

The utility model discloses a kind of mining high-capacity lead-acid storage battery intelligent charger control system, comprise: for detection of the voltage detecting circuit of main circuit output voltage, current detection circuit for detection of main circuit current, the control circuit module being connected with current detection circuit with voltage detecting circuit, be connected with control circuit module for driving the driver module of charger main circuit, be connected the voltage detection module for detection of voltage on line side with control circuit module, be connected the display circuit showing for charge parameter with control circuit module, be connected the keyboard circuit for parameter input with control circuit module.The parameter signals such as this control system net side, outlet side voltage monitor, show, can Autoamtic-protection charging machine when meeting accident not damaged, adopt two stage charging methods, make storage battery can fully be full of fast electricity, and property retention are stable.

Description

A kind of mining high-capacity lead-acid storage battery intelligent charger control system

Technical field

The utility model belongs to charge in batteries field, relates in particular to a kind of mining high-capacity lead-acid storage battery intelligent charger control system.

Background technology

The needed power resources of large coal mine winning apparatus such as the coal conveyor under coal mine, forklift are all generally lead-acid batteries, by a plurality of single-unit storage batterys, are in series and are formed.The capacity of lead-acid batteries is from 200Ah-1000Ah, and storage battery is realized energy recycling by charging, and the equipment of realizing battery charging is exactly charger apparatus, and its capacity is from tens to hundreds of kVA, and charging interval majority is in 8 hours.Colliery accumulator group charger device used is very extensive at present, a large coal mine of producing approximately 1,000 ten thousand tons per year, approximately more than 100, the accumulator group charger device of capacity used more than hundreds of kVA.The overhaul rules regulation of colliery electrical equipment, the service life of charger apparatus is that 3,000,000 tons of coals of every production just enter the overhaul phase (the main element replacing or the complete machine that mean device are changed completely).

By to deifying the investigation of several large coal mines of coalfield group, large-capacity battery group charging device under the coal mine of current capacity more than hundreds of kVA, most dependence on import, as the equipment of the U.S., Germany, and be the technology of external the eighties, be embodied in main circuit structure and control system all fairly simple, intelligent degree is low, and equipment is huge, volume is large, price, these devices all need to be domesticized, and improve the ratio of performance to price of product.Capacity is below hundreds of kVA, and compared with the storage battery pack charging device of low capacity, majority is of home make product.

The charging device based on thyristor that the lead acid battery charge equipment using on current colliery is still developed mostly the seventies and eighties, exist volume large, charging interval is long large to the infringement of battery, the shortcomings such as the charging interval is long, along with the development of technology, the main key technology trend of Coal mine charger is concentrated as what time following at present:

A. Highgrade integration, densification.The volume of power device is constantly diminishing, and integrated degree is more and more higher, wherein especially with the representative that appears as of integrated IGBT.The degree of integration of control system is also improving constantly, and technique becomes increasingly complex, and the integrated circuit towards scale develops.

B. frequency is more and more higher, along with traditional thyristor power devices such as GTO are substituted by IGBT igbt gradually, the frequency of charger, withstand voltage, power consumption become more and more come high, high frequencyization can obviously the deperm volume, weight etc. of transformer material and large electrochemical capacitor, can obviously reduce net side low-order harmonic content, the EMC performance that improves charger, alleviates the harmonic pollution to Coal Mine Power Network.

C. digitlization and the intellectuality of height reduce manual intervention as far as possible.

In the high-capacity lead-acid storage battery charging scheme of colliery, mainly adopt as the structure of Fig. 1 at present:

1). major loop adopts three-phase half-controlled bridge-type circuit, by fast acting fuse, rectifier transformer, piezo-resistance, shunt, three-phase half-controlled bridge-type rectification circuit form.

In A, major loop, the effect of piezo-resistance is the surge current in protection switching overvoltage limit circuit.

Fast acting fuse in B, major loop is for the short-circuit protection in loop.

C, the wire (104,103) that is connected across major loop storage battery two ends are reverse connecting protections.When charging device and batteries connect inverse time, the voltage of batteries own is connected major loop reverse connecting protection relay K coil, and relay adhesive is cut off major loop starter control loop power supply, reverse connecting protection indicator light D5 bright (redness).

2). phase-shift trigger circuit (CD-KJCF-001), it is the circuit board that Unit two are integrated and form, be characterized in without synchrotrans, only by rectifier transformer, after secondary output access pulsed triggering circuit plate is isolated by photoelectricity, signal is by the unified detection of processing phase sequence of single-chip microcomputer, the detection of synchronizing signal, the AC18V (being exported by control transformer) that power supply is supplied with synchronizes with phase sequence that it doesn't matter, the detection that is synchronizing signal is the secondary side by rectifier transformer, and voltage range is very wide, be not subject to whether primary side is 660V or the impact of 380V.The phase-shifting voltages of the lock-out pulse being come by sync detection circuit and adjusting testing circuit converts by phase shift block, then export phase-shift pulse to single-chip microcomputer, single-chip microcomputer is according to the phase sequence situation of phase-shift pulse and detection, respectively successively with the formal output pulse of spike train, through drive circuit pulse transformer, and export 10KHZ spike train and trigger controllable silicon change phase shift range.

3). calculating control circuit plate (CD-KJWJ-001), palpus and phase-shift trigger circuit plate support the use.For simplicity, following computer panel is called for short " microcomputer plate ", phase shift triggers control board and is called for short " trigger board ", microcomputer plate and trigger board support the use and can realize constant current charge, power supply exchanges two 13V ± 5%, one tunnel enters A/D converter through double integrator, one tunnel enters D/A converter through binary system, after normal boot-strap, have 30 seconds initial times, dextrorotation modulation stream potentiometer 1/3 circumference starts charging, determines battery block number in 10 minutes, after about 30 seconds, in 10 minutes, do not affect normal current stabilization charging.Charging device completes in the process of current stabilization, voltage stabilizing, normal charge, all, by microcomputer plate control program, accomplishes once to complete.

Prior art generally adopts the technical scheme of Thyristor Controlled rectification, this scheme is owing to can only being operated under lower frequency, the volume and weight of magnetic transformer and electrochemical capacitor is all larger, the phase shift adopting triggers control board and falls behind than at present popular high position processing systematic comparison, intelligent not.Existing charging technique is owing to adopting Thyristor Controlled rectification in addition, reactive power is larger, and charge efficiency is low, and a large amount of harmonic waves of net side are scurried into electrical network and easily caused harmonic pollution to bring infringement to the normal operation of other electric equipment in electrical network, output ripple is large, easily causes the storage battery warming-up effect life-span.

Utility model content

The problems such as the purpose of this utility model is to provide a kind of mining high-capacity lead-acid storage battery intelligent charger control system, is intended to solve prior art charging system not intelligent, can not adapt to different performance storage battery, and charge efficiency is low.

The utility model is to realize like this, a kind of mining high-capacity lead-acid storage battery intelligent charger control system comprises: for detection of the voltage detecting circuit of main circuit output voltage, current detection circuit for detection of main circuit current, the control circuit module being connected with current detection circuit with voltage detecting circuit, be connected with control circuit module for driving the driver module of charger main circuit, be connected the voltage detection module for detection of voltage on line side with control circuit module, be connected the display circuit showing for charge parameter with control circuit module, be connected the keyboard circuit for parameter input with control circuit module.

The described voltage detecting circuit being connected with main circuit, current detection circuit feed back for control circuit module provides voltage and current.

Described control circuit module adopts PWM that chip UCC3895 occurs.

Described driver module adopts 2SP0115T2Ax driver module, have use simple, reliable, have short-circuit protection, have input voltage monitoring, isolation voltage advantages of higher.

Described display circuit is for showing the parameter informations such as electric current, capacity of charge in batteries.

Described key circuit is set charge parameter information for user.

effect gathers

A kind of mining high-capacity lead-acid storage battery intelligent charger control system of the present utility model; temperature when the utility model adopts various signal acquisition circuits and fieldbus to work to charger; the parameter signals such as net side, outlet side voltage monitor, show, can Autoamtic-protection charging machine when meeting accident not damaged.Battery status signal is monitored and shown, protection battery is not damaged; Adopt two stage charging methods, under current/voltage PI link regulates, charging curve relatively approaches the ideal charging curve of lead accumulator, makes storage battery can fully be full of fast electricity, and property retention is stable.

Accompanying drawing explanation

Fig. 1 is traditional Thyristor Controlled rectification scheme block diagram;

Fig. 2 is the intelligent charger control system structure chart that the utility model embodiment provides;

Fig. 3 is the intelligent charger control circuit figure that the utility model embodiment provides;

Fig. 4 is the intelligent charger control system closed-loop structure figure that the utility model embodiment provides;

Wherein: 1, voltage detecting circuit; 2, current detection circuit; 3, control circuit module; 4, driver module; 5, voltage detecting circuit; 6, display circuit; 7, key circuit;

Embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.

As shown in Figure 2, the utility model is to realize like this, a kind of mining high-capacity lead-acid storage battery intelligent charger control system comprises: for detection of the voltage detecting circuit 1 of main circuit output voltage, current detection circuit 2 for detection of main circuit current, the control circuit module 3 being connected with current detection circuit 2 with voltage detecting circuit 1, be connected with control circuit module 3 for driving the driver module 4 of charger main circuit, be connected the voltage detection module 5 for detection of voltage on line side with control circuit module 3, be connected the display circuit 6 showing for charge parameter with control circuit module 3, be connected the keyboard circuit 7 for parameter input with control circuit module 3.

The voltage detecting circuit 1 being connected with main circuit, current detection circuit 2 feed back for control circuit module 3 provides voltage and current.

Control circuit module 3 adopts PWM that chip UCC3895 occurs.

Driver module 4 adopts 2SP0115T2Ax driver modules, have use simple, reliable, have short-circuit protection, have input voltage monitoring, isolation voltage advantages of higher.

Display circuit 6 is for showing the parameter information such as electric current, capacity of charge in batteries.

Key circuit 7 is set charge parameter information for user.

1) design of UCC3895 parameter

The intelligent charger control circuit figure that Fig. 3 provides for the utility model embodiment, as shown in the figure, the realization of the constant current of charger output or constant voltage closed-loop control operation, main by the control of IGBTPWM pulse signal is completed, this pwm signal is produced by chip UCC3895.On the basis of theory derivation and experimental verification, inventor verifies and optimizes the parameter of this chip:

Capacitor C 9 is connected rear and in parallel with pin 1 and the pin 2 of UCC3895 chip with resistance R 11; Capacitor C 5 meets GND after connecting with pin 7 with the pin 3 of UCC3895 chip; Capacitor C 4 meets GND after connecting with the pin 4 of UCC3895 chip; The pin 5 of UCC3895 chip meets GND; Resistance R 5 meets GND after connecting with the pin 8 of UCC3895 chip; After resistance R 6 and capacitor C 6 are in parallel, connect with the pin 9 of UCC3895 chip, be then connected to GND; After resistance R 7 and capacitor C 7 are in parallel, connect with the pin 10 of UCC3895 chip, be then connected to GND; Resistance R 11 is connected to V+ after connecting with the pin 11 of UCC3895 chip; Capacitor C 1 is connected to GND after connecting with the pin 12 of UCC3895 chip; The pin 13 of UCC3895 chip, pin 14, pin 17 are connected with IGBT driver module with pin 18; The pin 15 of UCC3895 chip meets GND, be connected to+15V of pin 16, shunt capacitance C2 between pin 15 and pin 16; After resistance R 10 and capacitor C 3 are in parallel, connect with the pin 19 of UCC3895 chip, be then connected to GND; Resistance R 8 meets GND after connecting with the pin 20 of UCC3895 chip; Parallel resistance R9 between the pin 19 of UCC3895 chip and pin 20.

UCC3895 adopts average current control mode.Average-current mode is strong owing to having noise inhibiting ability, without advantages such as slope compensations, is widely used in pwm control circuit.Error amplifier in-phase end input signal is controlled voltage signal V ₊, backward end input signal is the inductor current signal V that end gathers _-.Error amplifier output average current tracking error signal U _eOUT, this signal and RAMP end sawtooth signal compare, and obtain PWM and turn-off constantly, as the control driving signal of IGBT.CS end is overcurrent protection end, and its shutoff voltage is 2.5V (its protective current upper limit can hardware setting), and input signal is the inductor current signal i detecting _c.When there is overcurrent or short trouble, can close immediately PWM output, when lithium-ion-power cell is charged, can protect well battery and charger to avoid overcurrent and damage.SS end can be realized soft start function by capacity earth.Experiment output waveform as shown in Figure 4.

UC3895 setting parameter:

A. frequency setting: f _outwei Si road output frequency, f _infor chip internal clock frequency.Expect the output frequency of 20kHz, so f _in=40kHz.By the chip internal clock cycle

$t_{\mathrm{ose}}=\frac{{5R}_T{C}_T}{48}+120\mathrm{ns}---\left(1\right)$

Can calculate R ₅=30k Ω, C ₅=100pf.

B. delay time is set:

$t_{\mathrm{SWLAY}}=\frac{{25\×10}^{-12}{R}_{\mathrm{DEL}}}{V_{\mathrm{DEL}}}+25\mathrm{ns}---\left(2\right)$

DELAB and DELCD both end voltage meet: $V_{\mathrm{DEL}}=0.75\×(V_{\mathrm{CS}}-V_{\mathrm{ADS}})+0.5$ (3)

V wherein _cS-V _aDSmagnitude range is 0v～2.5v.V _dELmagnitude range is that 0.5v～2.375v. is defeated

Go out to hold size of current to meet $I_{\mathrm{DEL}}=\frac{V_{\mathrm{DEL}}}{R_{\mathrm{DEL}}}\≤1\mathrm{mA}.$

Choose R _dELAB=R _dELXD=109k Ω, R _cS=200k Ω, R _aDS=100k Ω, now meets I _dEL=0.016mA<1mA. Dead Time t _dELAYscope is: 1.15us～5.45us.

2) the two closed-loop controls of current/voltage

Charger output controlling unit adopts outer voltage, the two closed loop control modes of current inner loop, its curve of output well charging curve of matching lithium ion battery (be to the maximum ± 50mV of error), for extending battery life, improves battery operated efficiency and plays great role.Wherein current inner loop is by software set, and outer voltage is completed by UCC3895 peripheral circuit, as shown in Figure 4 hardware PI modulation link.

The charging initial stage exports with constant current mode, and K1 turn-offs, and K2 is closed into b end, UCC3895 internal error

Comparator connects into follower, enters current closed-loop control model, K in current closed-loop PI controlling unit _p, K _iby software set, its input and output relation:

$i\left(t\right)=K_P\mathrm{\&Delta;i}\left(t\right)+K_I{\&Integral;}_0^t\mathrm{\&Delta;i}\left(t\right)\mathrm{dt}---\left(4\right)$

Under constant current mode, along with the carrying out of charging process, battery tension can constantly rise, and under the control action of current closed-loop, for keeping constant current, charger output voltage also can constantly rise, and remains certain pressure reduction so.When charger output voltage is raised to reference value U1, proceed to immediately voltage close loop and control with constant voltage mode output, this is that K1 is open-minded, and K2 is closed into a end.Input/output relation now:

$u\left(t\right)=-\frac{R2}{R1}e\left(t\right)+\frac{1}{R1C}\&Integral;e\left(t\right)\mathrm{dt}$

e(t)＝U1(t)-U2(t) (6)

Under constant voltage mode, along with pressure reduction constantly reduces, output current also constantly reduces with certain rule, and when electric current is reduced to 0, battery is full of electricity, stops charging or continues charging with trickle pattern.

Although above-mentioned, by reference to the accompanying drawings embodiment of the present utility model is described; but the not restriction to the utility model protection range; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various modifications that performing creative labour can make or distortion still within protection range of the present utility model.

Claims (4)

1. a mining high-capacity lead-acid storage battery intelligent charger control system, it is characterized in that, comprise: for detection of the voltage detecting circuit of main circuit output voltage, current detection circuit for detection of main circuit current, the control circuit module being connected with current detection circuit with voltage detecting circuit, be connected with control circuit module for driving the driver module of charger main circuit, be connected the voltage detection module for detection of voltage on line side with control circuit module, be connected the display circuit showing for charge parameter with control circuit module, be connected the keyboard circuit for parameter input with control circuit module.

2. mining high-capacity lead-acid storage battery intelligent charger control system according to claim 1, is characterized in that, described voltage detecting circuit, current detection circuit feed back for control circuit module provides voltage and current.

3. mining high-capacity lead-acid storage battery intelligent charger control system according to claim 1, is characterized in that, described control circuit module adopts PWM that chip UCC3895 occurs.

4. mining high-capacity lead-acid storage battery intelligent charger control system according to claim 1, is characterized in that, described driver module adopts 2SP0115T2Ax driver module.