CN102412608A - Charging and discharging circuit for electrical system - Google Patents

Charging and discharging circuit for electrical system Download PDF

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Publication number
CN102412608A
CN102412608A CN2011103851030A CN201110385103A CN102412608A CN 102412608 A CN102412608 A CN 102412608A CN 2011103851030 A CN2011103851030 A CN 2011103851030A CN 201110385103 A CN201110385103 A CN 201110385103A CN 102412608 A CN102412608 A CN 102412608A
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CN
China
Prior art keywords
contactor
resistance
touch point
relay
switch
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Granted
Application number
CN2011103851030A
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Chinese (zh)
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CN102412608B (en
Inventor
陈华
东荣
张迁
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Zoomlion Heavy Industry Science and Technology Co Ltd
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Zoomlion Heavy Industry Science and Technology Co Ltd
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Priority to CN201110385103.0A priority Critical patent/CN102412608B/en
Publication of CN102412608A publication Critical patent/CN102412608A/en
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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P7/00Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
    • H02P7/18Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
    • H02P7/20Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using multi-position switch, e.g. drum, controlling motor circuit by means of relays
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0063Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007Regulation of charging or discharging current or voltage
    • H02J7/00712Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage

Abstract

The invention relates to a technology in the mechanical and electrical field, in particular to a charging and discharging circuit for an electrical system. The charging and discharging circuit comprises an energy storing unit, a motor driver and a storage battery, and is characterized by further comprising a logical control unit, a switch control unit and a voltage-dividing unit, wherein the logical control unit is connected with the energy storing unit and the motor driver through data buses; the switch control unit is connected with the logical control unit and the storage battery, and is used for receiving a logical control signal transmitted by the logical control unit and controlling the switch-on and switch-off of each touch control point in the voltage-dividing unit; and the voltage-dividing unit is connected with the energy storing unit and the motor driver, and is used for receiving a switch control signal transmitted by the switch control unit, switching on or off each touch control point and adjusting the resistance of a voltage-dividing resistor. Due to the adoption of the charging and discharging circuit for the electrical system provided by the embodiment of the invention, the resistance value of the voltage-dividing resistor can be adjusted appropriately, the charging and discharging efficiencies are greatly increased, and high maneuverability is achieved.

Description

A kind of charge-discharge circuit of electrical system
Technical field
The present invention relates to the mechanical electric art, relate in particular to a kind of charge-discharge circuit of electrical system.
Background technology
The auxiliary electrical dynamical system of oil electric mixed dynamic machinery comprises: electrical energy storage unit, dynamoelectric machine and driver thereof, system control unit.When design selection, in order to improve the service efficiency of energy, tend to use high-tension drive system, thereby must select high-voltage energy storage device and the electric fittings that is complementary with this high-tension drive system for use.Usually, when overhaul of the equipments is perhaps safeguarded, need the electric energy of high-voltage energy storage device be passed through outer load discharge, make voltage drop to safe voltage.Because plant equipment often works in all kinds of isolated areas after dispatching from the factory, and the more portable band of ability device volume is let out in discharge.
Simultaneously, all there is certain leakage current in the used energy storage device of oil electric mixed dynamic machinery, when not using perhaps zero electric energy transportation (super capacitor) for a long time, and need be to this energy storage device charging.If utilize the engine drives electric power generation to charge, may cause overcurrent because the voltage difference between generating voltage and the energy storage device terminal voltage is excessive, thereby damage electric original paper for energy storage device.Usually the method for utilizing the external charge machine perhaps in motor driver, to increase the current limliting precharging circuit addresses the above problem.But the former needs external power supply to be unfavorable for field work; The latter's installing space is limited by driver size, causes the heat radiation that big power consumption is let out the ability device and is unfavorable for current-limiting circuit can not be installed.
Summary of the invention
The embodiment of the invention provides a kind of charge-discharge circuit of electrical system, resistance that can the timely adjustment divider resistance, bigger raising efficiency for charge-discharge, and mobility is stronger.
The embodiment of the invention provides a kind of charge-discharge circuit of electrical system, comprising: energy-storage units, motor driver, storage battery also comprise:
Logic control element is connected with said electrode driver with said energy-storage units through data/address bus;
Switch control unit is connected with said storage battery with said logic control element, receives the logic control signal that said logic control element sends, and control is arranged in the disconnection and the closure of each touch point of partial pressure unit;
Partial pressure unit is connected with said electrode driver with said energy-storage units, is used to receive the switch controlling signal that said switch control unit sends, and breaks off or closed said each touch point the resistance of adjustment divider resistance.
The embodiment of the invention provides a kind of charge-discharge circuit of electrical system; Through the current voltage of logic control element according to energy-storage units; Send logic control signal to switch control unit; Make in the switch control unit direct contactor and relay conducting or close, control in the partial pressure unit each touch point then and close or break off, so that the resistance value of adjustment divider resistance.Therefore, use the charge-discharge circuit of the electrical system that the embodiment of the invention provides, resistance that can the timely adjustment divider resistance, bigger raising efficiency for charge-discharge, and mobility is stronger.
Description of drawings
Fig. 1 is the sketch map of the charge-discharge circuit of electrical system in the embodiment of the invention;
Fig. 2 is the partial pressure unit sketch map of charge-discharge circuit in the embodiment of the invention;
Fig. 3 is the sketch map of the charge-discharge circuit of electrical system in the embodiment of the invention;
Fig. 4 is the sketch map of the discharge flow path of electrical system in the embodiment of the invention;
Fig. 5 is the sketch map of the charging flow of electrical system in another embodiment of the present invention.
Embodiment
At length set forth to the main realization principle of embodiment of the invention technical scheme, embodiment and to the beneficial effect that should be able to reach below in conjunction with each accompanying drawing.
In order to solve the problem that prior art exists, the embodiment of the invention provides a kind of charge-discharge circuit of electrical system, and is as shown in Figure 1, comprising: energy-storage units 101, motor driver 102, storage battery 103 also comprise:
Logic control element 104 is connected with said motor driver 102 with said energy-storage units 101 through data/address bus;
Switch control unit 105 is connected with said storage battery 103 with said logic control element 104, receives the logic control signal that said logic control element 104 sends, and control is arranged in the disconnection and the closure of each touch point of partial pressure unit 106;
Partial pressure unit 106 is connected with said motor driver 102 with said energy-storage units 101, is used for the switch controlling signal that receiving key control unit 105 sends, and breaks off or closed each touch point the resistance of adjustment divider resistance.
Preferable, this charge-discharge circuit also comprises: display screen 107, be connected with energy-storage units 101, said motor driver 102 and logic control element 104, and be used to show the current voltage of energy-storage units 101.
Concrete, in this charge-discharge circuit, the logic control signal of the digital form that switch control unit 105 RL control units 104 send, conducting or close corresponding D.C. contactor or relay; After D.C. contactor or the relay conducting, control the closed or disconnection of corresponding touch point, change the resistance value in the partial pressure unit.Like this, can be in the energy-storage units charge and discharge process, the resistance value of in good time adjustment partial pressure unit improves efficiency for charge-discharge, and has stronger mobility.
Wherein, This partial pressure unit has the function of adjustable resistor; Its concrete formation can design according to actual needs, can select power resistor or other power consumption components and parts for use, can use series-parallel system also can use the adjustable circuit form of other discharge powers.For example, this partial pressure unit can comprise at least three divider resistances and at least six touch points; (joining of each circuit is that be communicated with or disconnected less than distinguishing among Fig. 2, does not have a little) as shown in Figure 2 when partial pressure unit 106 comprises three divider resistances and six touch points, is specially:
The first contactor touch point Km1, first end connects the positive pole of energy-storage units 101, and second end connects first end of resistance R 1 and first end of resistance R 2;
The second contactor touch point Km2, first end connects second end of resistance R 2, and second end connects first end of resistance R 3, and second end of this resistance R 3 connects the positive pole of energy-storage units 101;
The 3rd contactor touch point Km3, first end connects second end of the second contactor touch point Km2, and second end of second end and resistance R 1 is connected first end of the 4th contactor touch point Km4 and first end of the 5th contactor touch point Km5 together; Second end of the 4th contactor touch point Km4 connects the negative pole of energy-storage units 101;
Second end of above-mentioned the 5th contactor touch point Km5 connects first end of the 6th contactor touch point Km6; Second end of the 6th contactor touch point Km6 connects the positive pole of energy-storage units 101;
During the electrical system operate as normal, the state of the 6th contactor touch point Km6 is normally closed, and the state of all the other touch points is for often opening;
When electrical system discharged and recharged, the initial condition of this first contactor touch point Km1 to the six contactor touch point Km6 was disconnection.
In addition, the negative pole of energy-storage units 101 directly connects motor driver 102, and the positive pole of energy-storage units 101 connects motor driver 102 through the 6th contactor touch point Km6.
Through the disconnection or the closure of above-mentioned touch point, can in the electrical system circuit, insert different resistance values.The disconnection of this each touch point or closed by corresponding D.C. contactor control in the switch control unit 105 when the D.C. contactor conducting, is controlled corresponding touch point closure, and the person does not break off.
(to be drawn as dotted line proper for 105 frame among Fig. 3 for switch control unit 105?) can comprise: with the same number of D.C. contactor of touch point in the partial pressure unit 106, at least two relays and hand switch; The number of this relay switch can be adjusted according to actual needs, and is as shown in Figure 3,, when switch control unit 105 comprises first relay, second relay and six D.C. contactors, is specially in conjunction with Fig. 2:
The equal ground connection of first end of two relays (KA1, KA2) and six D.C. contactors (KM1 to KM6), and the negative pole of connection storage battery 103, first end of these two relays and six D.C. contactors is a diode cathode direction in relay and the D.C. contactor;
Does not (this element appear in the front with handing over, can be expressed as " the first relay contact switch Ka1 of relay K A1 " to connect first end of manual switch S and the first relay contact switch Ka1 of relay K A1 with second end of the 4th D.C. contactor KM4 that the 4th contactor touch point Km4 is corresponding in the partial pressure unit 106?) the first end k1; Second end of all the other D.C. contactors, first relay and second relay all is connected logic control element 104, and these all the other D.C. contactors, first relay and second relay, second end are diode cathode direction in relay and the D.C. contactor;
This first relay contact switch Ka1 is a double contact switch, and its second end k2 connects second end of manual switch S, the 3rd end k3 connect with partial pressure unit 106 in second end of the corresponding second D.C. contactor KM2 of the second contactor touch point Km2; Be connected diode VD1 between second end of this second D.C. contactor KM2 and the logic control element 104;
First end of the second relay contact switch Ka2 of relay K A2 connects the positive pole of storage battery 103, and second end connects second end of manual switch S and second end of the first relay contact switch Ka1;
When electrical system discharged and recharged, the initial condition of this hand switch S was for breaking off, and the switch k2 that is positioned at the first relay contact switch Ka1, second end is the normally opened contact switch, and the switch that is positioned at the first relay contact switch Ka1 the 3rd end k3 is the normally-closed contact switch.
In conjunction with Fig. 1, Fig. 2 and Fig. 3; When electrical system is in the electric weight of breakdown maintenance state, release energy-storage units 101, closed hand switch S, the second D.C. contactor KM2 and the equal conducting of the 4th D.C. contactor KM4; Switch controlling signal is sent to partial pressure unit 106; It is closed to control the second contactor touch point Km2 and the 4th contactor touch point Km4, and resistance R 1, resistance R 2 and resistance R 3 series connection are through the electric weight of the release of the resistance after series connection energy-storage units 101.Like this, can under the situation that electrical system does not power on, carry out the discharge of energy-storage units.
In conjunction with Fig. 1, Fig. 2 and Fig. 3; When electrical system discharges the electric weight in the energy-storage units 101 automatically; Logic control element 104 sends logic control signal to the first relay K A1; Control the first relay K A1 conducting, and then the normally opened contact switch closure, normally-closed contact switch of controlling the first relay contact switch Ka1 break off, make the 4th D.C. contactor KM4 conducting; Its 4th corresponding contactor touch point Km4 is closed in the 4th D.C. contactor KM4 control.
Then, above-mentioned logic control element 104 obtains the current voltage of energy-storage units 101; The current voltage and the first voltage threshold U1 are done comparison, if during greater than the first voltage threshold U1, the resistance value of adjustment partial pressure unit 106 is first resistance; If be not more than the first voltage threshold U1, the current voltage and the second voltage threshold U2 are done comparison, if little, the resistance value of then adjusting partial pressure unit 106 is second resistance; If be not more than the second voltage threshold U2 and greater than safe voltage U3, the resistance value of adjustment partial pressure unit 106 is the 3rd resistance; If be not more than said safe voltage U3, stop discharge;
Wherein, first resistance is greater than second resistance, and second resistance is greater than the 3rd resistance.
In conjunction with Fig. 1, Fig. 2 and Fig. 3; When automatically energy-storage units 101 being charged under the situation of electrical system operate as normal; Logic control element 104 sends logic control signal to the 5th D.C. contactor KM5 and the 6th D.C. contactor KM6, conducting the 5th D.C. contactor KM5, closes the 6th D.C. contactor KM6; Its 5th corresponding contactor touch point Km5 is closed in the 5th D.C. contactor KM5 control, and its 6th corresponding contactor touch point Km6 of the 6th D.C. contactor KM6 control breaks off;
Then, above-mentioned logic control element 104 obtains the current voltage of energy-storage units 101, confirms the voltage difference Δ U of normal working voltage and current voltage; The voltage difference Δ U and the first voltage difference threshold value U1 ' are done comparison, if greater than the first voltage difference threshold value U1 ', the resistance value of adjustment partial pressure unit 106 is first resistance; If be not more than the first voltage difference threshold value U1 ', the voltage difference Δ U and the second voltage difference threshold value U2 ' are done comparison, if little, the resistance value of then adjusting partial pressure unit 106 is second resistance; If be not more than the second voltage difference threshold value U2 ' and greater than minimum voltage limit value U3 ', the resistance value of adjustment partial pressure unit 106 is the 3rd resistance; If be not more than minimum voltage limit value U3 ', switch to conventional control circuit, the connection of the said partial pressure unit of bypass;
Wherein, first resistance is greater than second resistance, and second resistance is greater than the 3rd resistance.
Adjust partial pressure unit 106 resistances, be the mode of first resistance, second resistance, the 3rd resistance, can reference table one and table two.
Table one
Electric pressure The conducting contactor The resistance of adjustment partial pressure unit 106
Umax≥U≥U1 KM2 R=R1+R2+R3
U1>U≥U2 KM1,KM3 R=R1×R2/(R1+R2)
U2>U≥U3 KM1,KM2,KM3 R=R1×R2×R3/(R1×R2+R2×R3+R1×R3)
Table two
Electric pressure The conducting contactor The resistance of adjustment partial pressure unit 106
ΔU≥U1’ KM2 R=R1+R2+R3
U1’>ΔU≥U2’ KM1,KM3 R=R1×R2/(R1+R2)
U2’>ΔU≥U3’ KM1,KM2,KM3 R=R1×R2×R3/(R1×R2+R2×R3+R1×R3)
Concrete, when the resistance value of adjustment partial pressure unit 106 was first resistance, logic control element 104 sent the logic control signal of digital form, the conducting second D.C. contactor KM2 to the second D.C. contactor KM2; Its second corresponding contactor touch point Km2 is closed in this second D.C. contactor KM2 control, with resistance R 1, resistance R 2 and resistance R 3 series connection.When the resistance value of adjustment partial pressure unit 106 is second resistance; Logic control element 104 sends the logic control signal of digital form, conducting first D.C. contactor KM1 and the 3rd D.C. contactor KM3 to the first D.C. contactor KM1 and the 3rd D.C. contactor KM3; Its first corresponding contactor touch point Km1 is closed in this first D.C. contactor KM1 control, and its 3rd corresponding contactor touch point Km3 is closed in the 3rd D.C. contactor KM3 control, with resistance R 1 and resistance R 2 parallel connections.When the resistance value of adjustment partial pressure unit 106 is the 3rd resistance; This logic control element 104 sends the logic control signal of digital form respectively to the first D.C. contactor KM1, the second D.C. contactor KM2 and the 3rd D.C. contactor KM3, the conducting first D.C. contactor KM1, the second D.C. contactor KM2 and the 3rd D.C. contactor KM3; Its first corresponding contactor touch point Km1 is closed in this first D.C. contactor KM1 control, and its second corresponding contactor touch point Km2 is closed in second D.C. contactor KM2 control; Its 3rd corresponding contactor touch point Km3 is closed in the 3rd D.C. contactor KM3 control, with resistance R 1, resistance R 2 and resistance R 3 parallel connections.
When the current voltage of the energy-storage units 101 after the discharge is not more than the safe voltage value; The conducting second relay K A2; Make the second relay contact switch Ka2 break off; Then the first relay K A1, the first D.C. contactor KM1, the second D.C. contactor KM2 and the 3rd D.C. contactor KM3 are all cut off the power supply, so that break off the first relay switch Ka1, the first contactor touch point Km1, the second contactor touch point Km2 and the 3rd contactor touch point Km3.At last, conducting the 6th D.C. contactor KM6 makes the 6th contactor touch point Km6 closed.
In charging process, the current voltage of energy-storage units 101 and the voltage difference between the normal working voltage are not more than the minimum voltage limit value, switch to conventional control circuit, the connection of the said partial pressure unit of bypass.Just, first conducting the 6th D.C. contactor KM6 makes the 6th contactor touch point Km6 closed.Then; The 5th relay K M5, the first D.C. contactor KM1, the second D.C. contactor KM2 and the 3rd D.C. contactor KM3 are all cut off the power supply; So that break off the 5th contactor touch point Km5, the first contactor touch point Km1, the second contactor touch point Km2 and the 3rd contactor touch point Km3; Switch to conventional control circuit, the connection of the said partial pressure unit of bypass.
Preferable, can on display screen 107, demonstrate the current voltage of energy-storage units 101 in real time, but also automatic discharge button, automatic charge button etc. can be set on this display screen 107.
Pass through foregoing description; Can find out that the charge-discharge circuit of the electrical system that the use embodiment of the invention provides is through the current voltage of logic control element according to energy-storage units; Send logic control signal to switch control unit; Make in the switch control unit direct contactor and relay conducting or close, control in the partial pressure unit each touch point then and close or break off, so that the resistance value of adjustment divider resistance.Therefore, use the charge-discharge circuit of the electrical system that the embodiment of the invention provides, resistance that can the timely adjustment divider resistance, bigger raising efficiency for charge-discharge, and mobility is stronger.
The charge-discharge circuit of the electrical system that the embodiment of the invention is provided through specific embodiment below is described in detail, and is to content shown in Figure 3, as shown in Figure 4 in conjunction with above-mentioned Fig. 1, when electrical system is discharged automatically, may further comprise the steps:
Step 401, disconnection the 6th contactor touch point Km6; Concrete, during the electrical system operate as normal, the 6th contactor touch point Km6 is a closure state.When electrical system was discharged automatically, logic control element sent logic control signal to the 6th D.C. contactor KM6, closes the 6th D.C. contactor KM6, made the 6th contactor touch point Km6 break off.
Step 402, closed the 4th contactor touch point Km4; Concrete, logic control element sends logic control signal to the first relay K A1, and the conducting first relay K A1 breaks off first switch closure of the relay switch Ka1 that wins, second switch, thus conducting the 4th D.C. contactor KM4.After the 4th D.C. contactor KM4 conducting, produce magnetic field, make the 4th contactor touch point Km4 closed.
Step 403, the disconnection second relay switch Ka2;
Step 404, logic control element obtain the current voltage of energy-storage units, and do comparison with first voltage threshold, if be not more than execution in step 405; If greater than, behind the then closed second contactor touch point Km2, continue execution in step 405;
Step 405, the current voltage and second voltage threshold are done comparison, if be not more than execution in step 407; If greater than, then execution in step 406;
Behind step 406, the disconnection second contactor touch point Km2, closed first contactor touch point Km1 and the 3rd contactor touch point Km3 continue execution in step 407 again;
Step 407, current voltage and tertiary voltage threshold value are done comparison, if greater than, the closed second contactor touch point Km2, execution in step 408; If be not more than execution in step 409;
Step 408, whether judge current voltage less than the tertiary voltage threshold value, if less than, then execution in step 409; If be not less than, then continue to carry out this step;
Behind step 409, the closed second relay switch Ka2, break off the first relay switch Ka1, the first contactor touch point Km1, the second contactor touch point Km2 and the 3rd contactor touch point Km3;
Step 410, closed the 6th contactor touch point Km6.
, as shown in Figure 5 in conjunction with above-mentioned Fig. 1 to content shown in Figure 3, when electrical system is carried out current-limiting charge, may further comprise the steps:
Step 501, disconnection the 6th contactor touch point Km6; Concrete, during the electrical system operate as normal, the 6th contactor touch point Km6 is a closure state.When electrical system was filled, logic control element sent logic control signal to the 6th D.C. contactor KM6, closes the 6th D.C. contactor KM6, made the 6th contactor touch point Km6 break off.
Step 502, closed the 5th contactor touch point Km5; Concrete, logic control element sends logic control signal, conducting the 5th D.C. contactor KM5 to the 5th D.C. contactor KM5.After the 5th D.C. contactor KM5 conducting, produce magnetic field, make the 5th contactor touch point Km5 closed.
Step 503, logic control element obtain the current voltage of energy-storage units and the voltage difference between the normal working voltage;
Step 504, the current voltage difference and the first voltage difference threshold value are done comparison, if be not more than execution in step 505; If greater than, behind the then closed second contactor touch point Km2, continue execution in step 505;
Step 505, the current voltage difference and the second voltage difference threshold value are done comparison, if be not more than execution in step 507; If greater than, then execution in step 506;
Behind step 506, the closed first contactor touch point Km1, break off the second contactor touch point Km2, closed again the 3rd contactor touch point Km3 continues execution in step 507;
Step 507, current voltage difference and tertiary voltage difference threshold are done comparison, if greater than, the closed second contactor touch point Km2, execution in step 508; If be not more than execution in step 509;
Step 508, whether judge current voltage difference less than the tertiary voltage difference threshold, if less than, then execution in step 509; If be not less than, then continue to carry out this step;
Step 509, closed the 6th contactor touch point Km6;
Step 510, disconnection the 5th contactor touch point Km5, the first contactor touch point Km1, the second contactor touch point Km2 and the 3rd contactor touch point Km3.
Pass through foregoing description; Can find out that the charge-discharge circuit of the electrical system that the use embodiment of the invention provides is through the current voltage of logic control element according to energy-storage units; Send logic control signal to switch control unit; Make in the switch control unit direct contactor and relay conducting or close, control in the partial pressure unit each touch point then and close or break off, so that the resistance value of adjustment divider resistance.Therefore, use the charge-discharge circuit of the electrical system that the embodiment of the invention provides, resistance that can the timely adjustment divider resistance, bigger raising efficiency for charge-discharge, and mobility is stronger.
The application is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the application embodiment.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out through the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in ability vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work; Make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device; Make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of on computer or other programmable devices, carrying out is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
Obviously, those skilled in the art can carry out various changes and modification and the spirit and the scope that do not break away from the application to the application.Like this, belong within the scope of the application's claim and equivalent technologies thereof if these of the application are revised with modification, then the application also is intended to comprise these changes and modification interior.

Claims (11)

1. the charge-discharge circuit of an electrical system comprises: energy-storage units, motor driver, storage battery, it is characterized in that, and also comprise:
Logic control element is connected with said motor driver with said energy-storage units through data/address bus;
Switch control unit is connected with said storage battery with said logic control element, receives the logic control signal that said logic control element sends, and control is arranged in the disconnection and the closure of each touch point of partial pressure unit;
Partial pressure unit is connected with said motor driver with said energy-storage units, is used to receive the switch controlling signal that said switch control unit sends, and breaks off or closed said each touch point the resistance of adjustment divider resistance.
2. charge-discharge circuit as claimed in claim 1 is characterized in that, said switch control unit receives the logic control signal of the digital form that said logic control element sends, conducting or close corresponding D.C. contactor or relay; After said D.C. contactor or the relay conducting, control the closed or disconnection of corresponding touch point, change the resistance value in the said partial pressure unit.
3. charge-discharge circuit as claimed in claim 1 is characterized in that, said partial pressure unit comprises: at least three divider resistances and at least six touch points;
When partial pressure unit comprises three divider resistances and six touch points,
The first contactor touch point, first end connects the positive pole of said energy-storage units, and second end connects first end of resistance R 1 and first end of resistance R 2;
The second contactor touch point, first end connect second end of said resistance R 2, and second end connects first end of resistance R 3, and second end of said resistance R 3 connects the positive pole of said energy-storage units;
The 3rd contactor touch point, first end connect second end of the said second contactor touch point, and second end of second end and said resistance R 1 is connected first end of the 4th contactor touch point and first end of the 5th contactor touch point together; Second end of said the 4th contactor touch point connects the negative pole of said energy-storage units;
Second end of said the 5th contactor touch point connects first end of the 6th contactor touch point;
Second end of said the 6th contactor touch point connects the positive pole of said energy-storage units;
During the electrical system operate as normal, the state of said the 6th contactor touch point is normally closed, and the state of all the other touch points is for often opening;
When electrical system discharged and recharged, the initial condition of the said first contactor touch point to said the 6th contactor touch point was disconnection.
4. charge-discharge circuit as claimed in claim 3 is characterized in that, said switch control unit comprises: with the same number of D.C. contactor of touch point in the said partial pressure unit, at least two relays and hand switch;
When said switch control unit comprises first relay, second relay and six D.C. contactors, when each relay all has a relay contact,
The equal ground connection of first end of said two relays and six D.C. contactors, and connect the negative pole of said storage battery, first end of said two relays and six D.C. contactors is a diode cathode direction in relay and the D.C. contactor;
Connect first end of first relay contact switch of first end and first relay of said hand switch with second end of the 4th D.C. contactor that the 4th contactor touch point is corresponding in the said partial pressure unit; Second end of all the other D.C. contactors, said first relay and said second relay all is connected said logic control element, and second end of said all the other D.C. contactors, said first relay and said second relay is a diode cathode direction in relay and the D.C. contactor;
Said first relay contact switch is a double contact switch, and its second end connects second end of said hand switch, the 3rd end connect with said partial pressure unit in second end of corresponding second D.C. contactor of the second contactor touch point; Be connected diode between second end of said second D.C. contactor and the said logic control element;
First end of second relay contact switch of second relay connects the positive pole of said storage battery, and second end connects second end of said hand switch and second end of said first relay contact switch;
When electrical system discharged and recharged, the initial condition of said hand switch was for breaking off, and the switch that is positioned at said first relay contact switch, second end is the normally opened contact switch, and the switch that is positioned at said first relay contact switch the 3rd end is the normally-closed contact switch.
5. charge-discharge circuit as claimed in claim 4; It is characterized in that; When electrical system is in the electric weight of breakdown maintenance state, the said energy-storage units of release, closed said hand switch, said second D.C. contactor and the equal conducting of said the 4th D.C. contactor; Switch controlling signal is sent to said partial pressure unit; It is closed to control said second contactor touch point and said the 4th contactor touch point, and said resistance R 1, resistance R 2 and resistance R 3 series connection discharge the electric weight of said energy-storage units through the resistance after the series connection.
6. charge-discharge circuit as claimed in claim 4; It is characterized in that; When electrical system discharged the electric weight in the said energy-storage units automatically, said logic control element sent logic control signal to said first relay, controls the said first relay conducting; And then the normally opened contact switch closure, normally-closed contact switch of controlling said first relay contact switch break off, and makes said the 4th D.C. contactor conducting; Its corresponding said the 4th contactor touch point of said the 4th D.C. contactor control is closed;
Said logic control element obtains the current voltage of said energy-storage units;
The said current voltage and first voltage threshold are done comparison, if during greater than said first voltage threshold, the resistance value of adjusting said partial pressure unit is first resistance;
If be not more than said first voltage threshold, the said current voltage and second voltage threshold are done comparison, if little, the resistance value of then adjusting said partial pressure unit is second resistance;
If be not more than said second voltage threshold and greater than safe voltage, the resistance value of adjusting said partial pressure unit is the 3rd resistance;
If be not more than said safe voltage, stop discharge;
Wherein, said first resistance is greater than said second resistance, and said second resistance is greater than said the 3rd resistance.
7. charge-discharge circuit as claimed in claim 4; It is characterized in that; When automatically said energy-storage units being charged under the situation of electrical system operate as normal; Said logic control element sends logic control signal to said the 5th D.C. contactor and the 6th D.C. contactor, conducting the 5th D.C. contactor, closes the 6th D.C. contactor; Its corresponding said the 5th contactor touch point of the 5th D.C. contactor control is closed, and its corresponding said the 6th contactor touch point of the 6th D.C. contactor control breaks off;
Said logic control element obtains the current voltage of said energy-storage units, confirms the voltage difference of normal working voltage and said current voltage;
The said voltage difference and the first voltage difference threshold value are done comparison, if during greater than the said first voltage difference threshold value, the resistance value of adjusting said partial pressure unit is first resistance;
If be not more than the said first voltage difference threshold value, the said voltage difference and the second voltage difference threshold value are done comparison, if little, the resistance value of then adjusting said partial pressure unit is second resistance;
If be not more than the said second voltage difference threshold value and greater than the minimum voltage limit value, the resistance value of adjusting said partial pressure unit is the 3rd resistance;
If be not more than said minimum voltage limit value, switch to conventional control circuit, the connection of the said partial pressure unit of bypass;
Wherein, said first resistance is greater than said second resistance, and said second resistance is greater than said the 3rd resistance.
8. like claim 6 or 7 described charge-discharge circuits; It is characterized in that; When the resistance value of adjusting said partial pressure unit was first resistance, said logic control element sent the logic control signal of digital form, said second D.C. contactor of conducting to said second D.C. contactor; Its corresponding said second contactor touch point of said second D.C. contactor control is closed, with resistance R 1, resistance R 2 and resistance R 3 series connection.
9. like claim 6 or 7 described charge-discharge circuits; It is characterized in that; When the resistance value of adjusting said partial pressure unit is second resistance; Said logic control element sends the logic control signal of digital form, said first D.C. contactor of conducting and the 3rd D.C. contactor to first D.C. contactor and the 3rd D.C. contactor; Its corresponding said first contactor touch point of said first D.C. contactor control is closed, and its corresponding said the 3rd contactor touch point of said the 3rd D.C. contactor control is closed, with resistance R 1 and resistance R 2 parallel connections.
10. like claim 6 or 7 described charge-discharge circuits; It is characterized in that; When the resistance value of adjusting said partial pressure unit is the 3rd resistance; Said logic control element sends the logic control signal of digital form respectively to first D.C. contactor, second D.C. contactor and the 3rd D.C. contactor, said first D.C. contactor of conducting, second D.C. contactor and the 3rd D.C. contactor; Its corresponding said first contactor touch point of said first D.C. contactor control is closed, and its corresponding said second contactor touch point of said second D.C. contactor control is closed; Its corresponding said the 3rd contactor touch point of said the 3rd D.C. contactor control is closed, with resistance R 1, resistance R 2 and resistance R 3 parallel connections.
11. charge-discharge circuit as claimed in claim 1 is characterized in that, also comprises:
Display screen is connected with said energy-storage units, said electrode driver and said logic control element, is used to show the current voltage of said energy-storage units.
CN201110385103.0A 2011-11-28 2011-11-28 Charging and discharging circuit for electrical system Active CN102412608B (en)

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