CN1022275C - Rectifier regulator for separate constant-current and constant-voltage charge of Nicd cells - Google Patents
Rectifier regulator for separate constant-current and constant-voltage charge of Nicd cells Download PDFInfo
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- CN1022275C CN1022275C CN 91101736 CN91101736A CN1022275C CN 1022275 C CN1022275 C CN 1022275C CN 91101736 CN91101736 CN 91101736 CN 91101736 A CN91101736 A CN 91101736A CN 1022275 C CN1022275 C CN 1022275C
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Abstract
The present invention relates to a divided constant current and constant voltage charge voltage-stabilizing nickel-cadmium cell tripping and switching rectifying device, which can be powered by nickel-cadmium cells and can be charged in the divided constant current and constant voltage mode only under the condition of a grid fault. The present invention can ensure that divided cells with approximate performance are in the most reasonable charging state, and divided cells with different performance are respectively charged. A control bus adopts voltage stabilization output, which improves the functional reliability of loads connected to the control bus. An electronic flash signal source guarantees high reliability. Microprocessor insulation monitoring and nickel-cadmium cell performance restoration and monitoring proposed by the present invention improve the performance and the reliability of the tripping and switching device.
Description
The present invention relates to a kind of ickel-cadmium cell DC power supply, specifically a kind of employing packet mode, ickel-cadmium cell DC power supply the complete sets of equipment with constant current and two kinds of charged states of constant voltage.
Small power station, transformer station, distribution substation of factory are as branch, power switch and the relaying protection of primary cut-out direct solenoid operating mechanism, the DC power supply of signal circuit; be small power generation, power transformation, the indispensable important electric equipment of distribution system; its performance and reliability; generating, the indispensable important electric equipment of distribution system have been determined to a great extent; its performance and reliability; determined the work quality of generating, distribution system to a great extent, ickel-cadmium cell branch in the past, contact rectification device be (as GKA
41, GKA
42And BAGN-1 etc.) all adopt ickel-cadmium cell to put in order the group charging modes, very difficult adaptation is the difference of each divided battery performance in fact inevitably, thereby the grouping that causes is overcharged, the grouping that has is undercharge again, thereby cause the deterioration in advance of ickel-cadmium cell performance, the charging modes that it adopted then adopts manually and switches, and because its electric current, the voltage charging mode neither constant current and constant voltage, can not satisfy ickel-cadmium cell to the charging requirement, its bussed supply mode is a rectifier power source, the ickel-cadmium cell parallel operation, rectifier power source carries out floating charge to ickel-cadmium cell simultaneously to bussed supply when line voltage is higher; When line voltage was low, the ickel-cadmium cell group just participated in power supply, thereby the ickel-cadmium cell power supply capacity descends when causing electric network fault, therefore has to adopt bigger ickel-cadmium cell capacity reserve.The way that it is taked for voltage ripple of power network, or utilize contactor to regulate transformer tapping voltage, or utilize the number of regulating the series diode group to change pressure drop.These two kinds of ways all adopt manual mode, not only regulate inconvenience, and power consumption are bigger, is difficult to satisfy the direct current supply requirement.Whole device does not have ickel-cadmium cell performance recovery and monitoring function.For example: Chinese patent CN87215941.8 discloses a kind of DC power supply the complete sets of equipment, and it comprises:
A rectifying device that is made of three phase mains transformer and three phase full bridge rectification unit is used for branch, combined floodgate power supply under the electrical network normal condition, its input termination three-phase alternating-current supply, and output is connected to closing bus bar;
An ickel-cadmium cell group, the branch when being used for electric network fault, the combined floodgate power supply, its input termination charging device, output engages the lock bus through spacer assembly;
A charging device is used for the charging of ickel-cadmium cell group, its input termination AC power, the both positive and negative polarity of output termination ickel-cadmium cell group;
A spacer assembly is used for the output of rectifying device and the output of ickel-cadmium cell group are isolated and automatic switchover, its input termination ickel-cadmium cell group, and the output of output and rectifying device is connected to closing bus bar.
The objective of the invention is the ickel-cadmium cell branch at present application, all deficiencies that the combined floodgate DC power supply exists, propose a kind ofly ickel-cadmium cell is rationally used and adopt the charging modes that meets the ickel-cadmium cell characteristic, have grouping IE charging modes, the ickel-cadmium cell branch of voltage regulation type, the combined floodgate DC power supply the complete sets of equipment of more excellent performance.
Feature of the present invention is that this charging device has a single phase poaer supply transformer that is provided with separately, and this power transformer secondary has separate a plurality of windings; Secondary winding is connected with a plurality of charhing units of similar number respectively and forms the grouping charging modes; Described ickel-cadmium cell group is in series by the more piece ickel-cadmium cell, divides into groups to be connected with charhing unit on the series connected battery group, and grouping number is identical with charhing unit.
The charhing unit that another feature of the present invention is described charging device has constant current and two kinds of charged states of constant voltage, when every batteries voltage is lower than 1.40v/c, be the constant current charge state, continuous current is 10 hour rate currents, when every joint is that cell voltage is when equaling 1.40v/c, be the constant voltage charge state, constant voltage voltage is 1.40v/c, and the conversion of two states is finished automatically by control circuit.
Another feature of the present invention is the performance monitoring device that comprises an ickel-cadmium cell, this device comprises main circuit and supervisory circuit, wherein main circuit is by the ickel-cadmium cell group, switch, load resistance, power switch, the discharge loop that sampling resistor constitutes, supervisory circuit is by microprocessor, the A/D converter, output interface, the PHC spacer assembly, dry-reed relay, D/A converter, PMW constant current control unit is formed, connect the battery of a grouping successively by microprocessor control dry-reed relay, send into microprocessor, detect the variation of each divided battery voltage in the constant-current discharge process through the A/D conversion, calculate discharge capacity (Ah number) and compare discriminating, simultaneously alarm signal is sent in defective grouping with the ickel-cadmium cell standard of stipulating.
Another feature of the present invention is the performance recovery device that comprises ickel-cadmium cell, this device comprises an adjustable constant-flow source and a constant pressure source, the multicycle circulation that utilizes this constant current and constant pressure source that ickel-cadmium cell standard charge and discharge mode is according to the rules charged, discharges, be used for the activity of conversion material, be IEI ... the EI pattern, wherein last constant current charge is by the charging of 10% hour rate current, and charging voltage is 1.75v/c.
Ickel-cadmium cell branch, the contact rectification device realized according to the present invention, its characteristics are that it separates two parts of rectifier power source and ickel-cadmium cell charging.Rectifier power source is in power supply under the normal condition as electrical network.It directly is connected to closing bus bar through a dropping resistor, uses for breaker closing; It is connected to the control bus through after the voltage stabilizing, supplies breaker open operation and relaying protection, signal circuit to use.The charging of ickel-cadmium cell system carries out constant current charge with 10 hour rate currents, when single battery voltage reaches 1.4V, changes over to automatically to press corresponding to every economize on electricity and is the constant voltage floating charge of 1.4V.Consider the performance difference of each divided battery, above-mentioned charging is that grouping is carried out.During electric network fault, by the level restricting relation, through automatic switch unit already charged ickel-cadmium cell is connected to closing bus bar and through be connected to after the voltage stabilizing control bus on, power by ickel-cadmium cell.Once power system restoration is normal, just return to the rectification power system power supply immediately.Wherein automatic switch unit is a diode network, when electrical network just often, rectifier power source input current potential always is higher than the current potential of ickel-cadmium cell input, because the blockade effect of diode, guaranteed by the rectifier power source power supply, and ickel-cadmium cell is in charging and hot stand-by duty.During electric network fault, rectifier power source input current potential is lower than ickel-cadmium cell input current potential, and the ickel-cadmium cell group just connects with closing bus bar through combined floodgate bus output, connects with the control bus after voltage stabilizing again simultaneously.When ickel-cadmium cell group voltage is lower than the voltage stabilizing value, then directly present relay and return the voltage regulation unit bypass, then without voltage stabilizing directly to control bussed supply.The electric potential relation of diode network has guaranteed that power system restoration switches to the rectifier power source power supply rapidly after normal incessantly.The switching regulator that is adopted has guaranteed when rectifier power source or ickel-cadmium cell voltage are higher, provides stable voltage with higher efficient to the control bus.Flashing light power supply as one of part of ickel-cadmium cell branch, contact rectification device has adopted the all-electronin type, and not only reliability height, life-span are long, and can regulate flashing rate easily.Bus insulation against ground monitoring detects three voltage signals by impedance inverter circuit, sends into microprocessor through the A/D conversion and goes out the insulation against ground resistance of positive and negative bus with the impedance conversion calculated with mathematical model, is shown.According to standard code, alarm signal and necessary protection are sent in graduation simultaneously.In order to guarantee in ickel-cadmium cell branch, the contact rectification device that ickel-cadmium cell can reliably working under the electric network fault situation, prevent that because of long-term floating charge causes disadvantages such as the decline of ickel-cadmium cell discharge capacity, degradation and life-span minimizing the present invention has increased the ickel-cadmium cell that is used for the device that is in turn(a)round or stand-by state and carried out non-online performance recovery and monitoring.This unit adopts microprocessor system, charge and discharge pattern according to standard is carried out performance recovery to ickel-cadmium cell, in discharge cycle, monitor each divided battery performance simultaneously, detect discharge capacity, indexs such as internal resistance are lower than the ickel-cadmium cell grouping of required standard, so that change early, prevent that ickel-cadmium cell is at electric network fault phase cisco unity malfunction and the generation accident.In the end a charge cycle carries out the IEI mode to ickel-cadmium cell and charges, and the equalizing charge of 10% rated current can make active material fully transform.
Fig. 1 is main circuit principle of the present invention wiring and control unit functional-block diagram.
Fig. 2 is the principle block diagram of grouping IE charging modes charhing unit.
Fig. 3 realizes the divide into groups a kind of electrical schematic diagram of scheme of IE mode charhing unit of Fig. 2.
Fig. 4 is electric current and the time dependent schematic diagram of voltage in the charging process of the output voltage-current characteristic of grouping IE mode charhing unit and a grouping ickel-cadmium cell.
Fig. 5 is the electrical schematic diagram of automatic switch unit.
Fig. 6 is the principle block diagram of switching mode voltage regulation unit.
Fig. 7 is the electrical schematic diagram of the PWM control a kind of scheme partly in the switching mode voltage regulation unit shown in Figure 6.
Fig. 8 is Fig. 6 and Fig. 7 voltage regulation unit and the relevant waveform schematic diagram of PWM control part.
Fig. 9 is the electrical schematic diagram of a kind of implementation of flashing light source unit.
Figure 10 is the principle block diagram of insulating monitoring unit.
Figure 11 is the principle block diagram of ickel-cadmium cell performance recovery and monitoring means.
Embodiment:
In main circuit connection of the present invention shown in Figure 1 and the control unit principle block diagram, three-phase transformer T is connected in electrical network through low-voltage circuit breaker Q1, and it is secondary through fuse F and rectifier diode D1～D6 composition three phase full bridge formula rectification circuit.Its output is through dropping resistor R
1, ammeter A feedback is connected to closing bus bar+WS, and the power switch under the electrical network normal condition is provided.Charging is connected in certain phase of electrical network through low-voltage circuit breaker Q2 with transformer TC, its secondary totally 18 windings, link with the automatic IE mode of No.1～No.18 charhing unit respectively, each charhing unit is linked to respectively again on 18 groups of (every group of 10 ickel-cadmium cells) batteries that are in series, and the IE mode of dividing into groups is charged.Rectifier power source and series connected battery group be negative pole altogether, and its positive pole is received respectively on two inputs of automatic switch unit.Automatic switch unit has three outputs, and one is connected on the voltage regulation unit, and one is to be connected to closing bus bar+ws through ammeter A feedback, and one then through the break contact of voltage detection unit relay K, receives control bus+WC through control side ammeter A feedback again.When electrical network just often, or under the failure condition by ickel-cadmium cell group power supply, when its voltage was higher than the voltage stabilizing output voltage, the voltage on the control bus was sent after the voltage regulation unit voltage stabilizing by first output.Behind the electric network fault, second output sent ickel-cadmium cell voltage on closing bus bar, for the usefulness of combined floodgate under the failure condition.When the relatively large discharge of ickel-cadmium cell made its output voltage be lower than voltage stabilizing output voltage setting under owing to failure condition, voltage detection unit discharged relay K, and the voltage under the failure condition is directly delivered to control bus+WC.The flashing light source unit is through low-voltage circuit breaker Q
FOutput.Push-button switch SB and signal lamp HLF are used for detecting whether operate as normal of flashing light source.The insulating monitoring unit then is connected between the both positive and negative polarity and protective earthing of bus.Closing circuit is through low-voltage circuit breaker QS1, QS2 ... feed out, control loop (comprising sub-gate circuit) is through low-voltage circuit breaker QC
1, QC
2... feed out.HL1 is whole device master pilot; HL2 is charging part signal lamp, HL3, HL4 ... be the closing circuit signal lamp; HL I, HL II ... be the control loop signal lamp.Be connected on R that the △ of transformer T time level connects, C network for absorbing network.
In the schematic diagram that the IE mode of dividing into groups shown in Figure 2 is charged, the secondary of control transformer is connected on the DC power supply, and this DC power supply is made up of two parts, and a part of is ickel-cadmium cell charging usefulness, and part system provides the voltage stabilizing negative supply to amplification, IE commutation circuit.The current potential of this charge power supply changes with the battery pack that is connected.R
1Be current sampling resistor.By R
7, R
8, R
9And C
6Form voltage sample circuit.When cell voltage is lower, when charging current was big, the current sampling driven was amplified, the IE commutation circuit, made and adjusted circuit working in constant current state, made the charhing unit outputting current steadily on 10 hour rate currents, and error is ± 2%.Rising to corresponding every batteries with the charging process cell voltage is to represent with 1.40V/C below the 1.40V() time, voltage sampling will drive amplification, IE commutation circuit, make to adjust circuit working in pressure constant state, with 1.40/C ± 1% constant voltage to battery charge.C
7Be output filter capacitor.D
7Battery is established to the charhing unit discharge when preventing fault.
In the electrical schematic diagram of a kind of implementation of grouping IE mode charhing unit shown in Figure 3, D
1～D
4With C
1Form the charging DC power supply, D
5, IC1, C
2With C
3The IC3 of composition in amplification, IE commutation circuit provides the DC power supply of the negative voltage of voltage stabilizing.By transistor V and IC2, R
2Form extended pattern and adjust circuit.Amplification, IE commutation circuit are by IC3, D
6, LED, R
3～R
6, C
4, C
5Form.When cell voltage is lower than 1.40V/C, when electric current was big, output current was at R, the voltage △ U of last generation
ITo cause IC
3The output potential step-down.Because IC
3Be in open loop situations, the corrective action of output will make its input terminal voltage approach zero, thereby make output current be subjected to IC2AD
5Voltage 1.25V and R between I end, the OUT end
1, R
4, R
5Restriction and keep constant.When battery charge hour, R
4On pressure drop greater than R
1On pressure drop △ V
1, the last output voltage of IC3 approaches+V
OUT, make LED, D
6End, then voltage is subjected to R between the IC2ADJ end OUT end
7And R
8, R
9Dividing potential drop restriction and keep voltage constant.
Fig. 4 left side figure is the charging voltage-current characteristics with respect to every batteries of Fig. 2 and grouping IE mode charhing unit shown in Figure 3.I
NBe 10 hour rate charging currents.The right figure of Fig. 4 is that charging current, voltage change schematic diagram in time in the actual charging process.As long as being lower than 1.4V, voltage just changes the charging of 10 hour rate current constant modes automatically over to.
Figure 5 shows that the electrical schematic diagram of the automatic switch unit circuit of forming by diode network.IN wherein
GBe ickel-cadmium cell group input, IN
VBe the rectifier power source input.Among the present invention, line voltage is IN in normal fluctuation range
VTerminal potential is higher than IN all the time
GTerminal potential, D
3End output OUT
5Owing to be connected to+WS, also be in the current potential approaching with rectifier power source, thereby D
1Also end.Rectifier power source is by IN
VEnd is through D
4Directly be sent to output OUT
CWork as electric network fault, IN
VEnd (and OUT
SEnd) current potential is lower than IN
GEnd, D
4End, the ickel-cadmium cell group is by IN
GEnd is through D
2Closing bus bar+WS is received in feedback, through D
3Be sent to output OUT
COutput OUT
DBe used for when battery voltage is low, directly feeding into the usefulness of control bus+WS.
In the voltage regulation unit principle block diagram shown in Figure 6, adopted the power mosfet switch element.The control signal decision that its on off state is sent by pwm control circuit α end.By R
6, R
7, R
8The voltage sampling circuit of forming is delivered to the sampled voltage of reflection output voltage in the pwm control circuit, produces driving voltage through its internal comparator, through R
2Deliver to the grid of MOSFET.By current sampling resistor R
SNGo up the obtained voltage that is proportional to electric current and send in the pwm control circuit, when the output peak current surpasses permissible value, then will export peak current limit on setting.C among the figure
1, C
2, R
1Input filter circuit.D
iBe MOSFET endophyte diode, R
3, C
3And R
4, C
4Be the resistance-capacitance type overvoltage and absorb network.D is a fly-wheel diode.L, C
5, C
6Be energy storage inductor and output filter capacitor.DW, R
2, R
5Form the input protection of MOSFET grid.
In the electrical schematic diagram of a kind of implementation of PWM control section, adopt the pulse-duration modulation signal generator of TL494 integrated PWM controller in the switching mode voltage regulation unit shown in Figure 7 as the PWM control unit.Voltage sampling signal is by V
SNEnd footpath R
11Send into the in-phase input end of internal amplifier, the signal feedback after the amplification is compared with the benchmark sawtooth waveforms that internal oscillator produces to inner PWM comparator, produces the pulse-width modulation driving pulse, through the transistorized collector electrode T of internal drive
1C, T
2COutput is added on the full bridge switching circuit of being made up of V1～V4, through C
7Driving pulse transformer T.Its secondary winding reaches by D
5, V
6The α end of the drive circuit of forming is delivered to the MOSFET grid.The peak over-current protection sampled signal is delivered to by V by b, C end
6, V
7The thyrister form protective circuit of forming is worked as R
SNOn sampled signal 〉=0.6V the time, make V
7, V
6The thyrister form circuit turn-on of forming turn-offs MOSFET.R among the figure
1, DW
1, V
8The decompression voltage regulator of forming provides low-voltage dc power supply to pwm control circuit.C
1, C
2Be filter capacitor.R
9, R
10Collector resistance for the output of TL494 open collector.D
1～D
4Be clamp diode.C
7Be capacitance.DW
2Be used for limiting too high input sample voltage.
PWM control is partly about in the waveform schematic diagram, through input V in Fig. 6 shown in Figure 8 and Fig. 7 circuit
SnBe input to the voltage that feeds back to the PWM internal comparator that the signal of pwm control circuit generates after amplifying, when it was lower than Dead Time control voltage, the ac square wave pulsewidth that this circuit produces is input on the transformer was determined (preceding 4 half-waves among the figure) by the intersection point of Dead Time control voltage and internal reference oscillator sawtooth waveforms.Be higher than Dead Time control voltage when feeding back to voltage on the PWM comparator, the ac square wave pulsewidth that then is input on the transformer T is just determined (back 6 half-waves among the figure) by the voltage and the internal reference oscillator sawtooth waveforms that feed back on the PWM comparator.When load impedance is lower than setting, the action of peak current protective circuit.With the peak current limit of MOSFET within the value of regulation (the first two ripple of MOSFET waveform).When load impedance is a normal range (NR), MOSFET driving voltage pulsewidth is then consistent with the pulsewidth that is input to transformer T.
In a kind of concrete enforcement circuit in flashing light source shown in Figure 9, by the switching device of MOSFET as the flashing light source.Its driving voltage is by IC
2And R
5, R
6, R
7On the low-frequency square-wave oscillator of forming, deliver to the grid of MOSFET through photoelectric isolating coupler spare PHC.Because the restriction of current potential, square-wave oscillator and MOSFET driving part can not the common DC power supplys, thereby adopted by IC
1Square-wave oscillator, switching transistor V
2And the switching type power supply of transformer T, through D
1, C
4And D
2, C
5Form two tunnel isolated DC power supply.R
1, DW1, V
1The circuit of forming forms the low-voltage direct stabilized voltage power supply of IC1.D
3, D
4Be fly-wheel diode.R
7, C
6And R
11, C
10For absorbing network.D is a MOSFET endophyte diode.DW
2, R
10Form MOSFET; The input saturation protection.R
9, C
9Be used to make the triode part base stage of PHC that fixed potential is arranged, improve antijamming capability.
In the insulating monitoring unit shown in Figure 10, by two identical two resistance △ of resistance r r
1, △ r
2Series connection is after bus selects the contact of polarized relay KP1 to be connected between the positive and negative busbar.Impedance conversion is then realized by the contact of another polarized relay KP2: when linking, the positive bus-bar insulation resistance is in parallel with r when this contact and polarity asterisk end (among the figure shown in " " mark), and negative busbar is resistance and (4+ △ r extremely
1+ △ r
2) be in series after the parallel connection; When this contact and the non-asterisk end of polarity link, then positive bus-bar insulation resistance and (r+ △ r
1+ △ r
2) in parallel, negative busbar insulation resistance be in series after r is in parallel.When three position polarized relay KP2 are in when disconnecting state, then can carry out bus voltage measurement, influence the factor of testing result to get rid of busbar voltage.Bus selects polarized relay then to select the bus of being tested (WC or WS).
When KP2 disconnected, the voltage that is input to the A/D conversion was
Wherein:
n= (Δr
2)/(Δr
1+Δr
2)
α
1= (Δr
1+Δr
2)/(r)
U
W-busbar voltage.
When KP2 and polarity asterisk end in contact, the voltage that is input to the A/D conversion is:
U
in.1=nU
w(α
rβ
2(1+β
1))/(β
1(1+α
r+β2)+β
2(1+α
r)(1+β
1))
Wherein:
β
1= (Rw+)/(r)
β
2= (R
w-)/(r)
R
W+, R
W--be respectively positive and negative busbar insulation against ground resistance.
When KP2 and nonpolar asterisk end in contact, the voltage that is input to the A/D conversion is:
U
in.2=n·U
w(α
rβ
1(1+β
2))/(β
2(1+α+β
1)+β
1(1+α
r)(1+β
2))
Above-mentioned three voltages according to measured just can calculate positive and negative bus insulation against ground resistance:
R
w+= ((u
1+u
2)(1+α
r)-α
r)/(u
1+u
2+α
r(u
2-1)) r
R
w-= ((u
1+u
2)(1+α
r)-α
r)/(u
1+u
2+α
r(u
2-1)) r
Wherein:
u
1= 1/(n) · (U
in.1)/(U
w)
Divider resistance △ r
2Selection should guarantee U
InMaximum be no more than the input dynamic range of A/D converter.
Whole measuring process is all carried out under the control of 8031 microprocessor systems.Sense cycle begins, and sends instruction and makes the contacting polarity asterisk end of KP1 polarized relay through driver, and WC carries out insulating monitoring to the control bus.Measure U successively
In, 0, U
In, 1, U
In, 2, send into microprocessor system through the A/D conversion, microprocessor then calculates according to physics proposed by the invention and Mathematical Modeling, obtains R
Wc+, R
W-Afterwards, send the nonpolar asterisk end of contacting that conversion instruction makes KP1, R is calculated in the same test of carrying out closing bus bar
Ws+LED shows that having scanning shows (successively by certain display cycle demonstration R
Wc+, R
W-, R
Ws+) and two kinds of functions of selectivity demonstration (selecting the insulation resistance of desire observation with function key).According to user or pertinent regulations, can set the deterioration of different insulative level and report to the police and protection, each value is reported to the police and protective circuit through the output interface driving by software set.Because potential difference, microprocessor system and peripheral circuit thereof have adopted the isolated DC power supply that is similar to Fig. 9 in the insulating monitoring unit, supply with each related device after voltage stabilizing.
Ickel-cadmium cell performance recovery and monitoring means shown in Figure 11 are one and carry out non-online ickel-cadmium cell performance recovery and monitoring at I, E type branch, closing device between turn(a)round or to standby branch, closing device.This unit is divided into main circuit and supervisory circuit.Main circuit comprises relay contact K, 2000W load resistance R
LPower mosfet switch and sampling resistor R
Sense, be connected in the special-purpose terminals X of branch, closing device
1, X
2The voltage of each divided battery group is then sent into monitoring means by socket, plug X.Monitoring means generates two groups of D.C. regulated power supplies of isolating mutually by independent ac power supply, and one group supplies PWM constant current control, D/A conversion, and one group of place that reaches that supplies with microprocessor system encloses circuit.Whole recovery, observation process are controlled by 8031 microprocessor systems.According to the technology of ickel-cadmium cell regulation, with whole performance recovery and observation process software set.After process began, the relay K of at first closing was carried out the regulation constant-current discharge then, and through output interface, PHC isolates discharging current by microprocessor, the current value of setting is sent into PWM constant current control through the D/A conversion carry out constant current control.In the discharge process, be controlled in the spring relay K by microprocessor
0～K
18And K
1 0～K
1 18Connect the battery of a grouping successively, send into microprocessor, detect the variation of each divided battery voltage of discharge process, calculate discharge capacity (Ah number) through the A/D conversion.Regulation discharges and recharges technology and can recover battery performance, can in time find the battery group that degradation or life-span end to each battery power discharge capacity monitoring so that in time change, prevent minute, generation accident in the closing device application process.Control procedure can be set by the program and the keyboard that solidify.LED shows the voltage and the capacity that can show each battery group, simultaneously defective grouping is sent alarm signal.Have the output print interface, can be for the various characteristics and the parameter of each battery group of printer prints.Last charging is undertaken by the IEI mode, and second constant current is 10% 10 hour rate currents, and voltage is 1.75V/C, and this equalizing charge process can make active material fully transform, and further improves the service behaviour of battery.Equalizing charge is answered about every three months and is carried out once.The electric current of equalizing charge, voltage setting value is by changing R in the IE charhing unit
1And R
9Realize by (by the switch of special use).
The overall fitting of the excellent properties of each unit proposed by the invention has guaranteed giving full play to and rational Application of battery performance, thereby can adopt bigger coefficient of safety, is branch, the closing device that premium properties, price ratio are arranged therefore.
Claims (4)
1, the ickel-cadmium cell DC power supply of a kind of constant current of dividing into groups, constant voltage charge comprises:
A rectifying device that is made of three phase mains transformer and three phase full bridge rectification unit is used for branch, combined floodgate power supply under the electrical network normal condition, its input termination three-phase alternating-current supply, and output is connected to closing bus bar;
An ickel-cadmium cell group is used for the divide-shut brake power supply under the electric network fault situation, its input termination charging device, and output engages the lock bus through spacer assembly;
A charging device is used for the charging to the ickel-cadmium cell group, its input termination AC power, output termination battery pack both positive and negative polarity;
A spacer assembly is used for isolation and automatic switchover between above-mentioned rectifying device output and the output of ickel-cadmium cell group, and the output of its input termination battery pack, output and rectifying device is connected to closing bus bar;
The present invention is characterised in that:
Described charging device comprises a single phase poaer supply transformer that is provided with separately, and this power transformer secondary has separate a plurality of windings, is connected with a plurality of charhing units of similar number respectively, and forms the grouping charging modes; Described ickel-cadmium cell group is composed in series by the more piece ickel-cadmium cell, divides into groups on the series connected battery group, and each grouping is connected with charhing unit, and grouping number is identical with charhing unit.
2, DC power supply according to claim 1, each charhing unit that it is characterized in that described charging device has constant current and two kinds of charged states of constant voltage, when every joint ickel-cadmium cell voltage is lower than 1.40v/c, be the constant current charge state, continuous current is 10 hour rate currents, when every batteries voltage equals 1.40v/c, becomes the constant voltage charge state, constant voltage voltage is 1.40v/c, and the conversion of two kinds of charged states is finished automatically by control circuit.
3, DC power supply according to claim 1 and 2, it is characterized in that comprising the monitoring device of an ickel-cadmium cell performance, this device comprises main circuit and supervisory circuit, wherein main circuit is by the ickel-cadmium cell group, switch, load resistance, power switch, the discharge loop that sampling resistor constitutes, supervisory circuit is by microprocessor, the A/D converter, output interface, the PHC isolated location, dry-reed relay, the D/A converter, PWM constant current control unit is formed, and by each grouping that dry-reed relay is connected above-mentioned ickel-cadmium cell group successively of microprocessor control, sends into microprocessor through the A/D conversion, detect the variation of each divided battery voltage in the constant-current discharge process, calculate discharge capacity, and compare discriminating, simultaneously alarm signal is sent in defective grouping with the ickel-cadmium cell standard of stipulating.
4, DC power supply according to claim 1 and 2, it is characterized in that also comprising the performance recovery device of ickel-cadmium cell, this device comprises a constant-source with adjustable and a constant pressure source, utilize this constant-current source and constant pressure source that the ickel-cadmium cell group is carried out IEIEI according to the ickel-cadmium cell specified standard to the ickel-cadmium cell group ... the multicycle cycle charge-discharge of IEI pattern, be used for the activity of conversion material, recover and improve battery operated performance, wherein last constant current charge electric current is 10% 10 hour rate currents, and charging voltage is 1.75v/c.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91101736 CN1022275C (en) | 1991-03-26 | 1991-03-26 | Rectifier regulator for separate constant-current and constant-voltage charge of Nicd cells |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91101736 CN1022275C (en) | 1991-03-26 | 1991-03-26 | Rectifier regulator for separate constant-current and constant-voltage charge of Nicd cells |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1055262A CN1055262A (en) | 1991-10-09 |
| CN1022275C true CN1022275C (en) | 1993-09-29 |
Family
ID=4905236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91101736 Expired - Fee Related CN1022275C (en) | 1991-03-26 | 1991-03-26 | Rectifier regulator for separate constant-current and constant-voltage charge of Nicd cells |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1022275C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100423401C (en) * | 2006-11-10 | 2008-10-01 | 张立 | Intelligent UPS with logic judging function |
| CN102694213A (en) * | 2012-06-25 | 2012-09-26 | 莫贵 | Grouping charging method for storage battery |
| TWI473323B (en) | 2012-12-13 | 2015-02-11 | Ind Tech Res Inst | Charging method for charging battery and related charging structure |
| CN104167570B (en) * | 2014-05-30 | 2016-09-14 | 杭州电子科技大学 | A kind of quick method for group matching of accumulator |
| JP6075499B1 (en) * | 2016-09-20 | 2017-02-08 | 富士ゼロックス株式会社 | Information processing apparatus, information processing system, and information processing program |
| CN109038713A (en) * | 2018-07-19 | 2018-12-18 | 金华安靠电源科技有限公司 | A kind of classification charging management system |
| CN112448451B (en) * | 2020-11-16 | 2022-08-02 | 山东圣阳电源股份有限公司 | Weak power supply method and device for battery pack management system and battery pack management system |
-
1991
- 1991-03-26 CN CN 91101736 patent/CN1022275C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1055262A (en) | 1991-10-09 |
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