CN103419643A - High voltage distribution control method and high voltage distribution control device - Google Patents
High voltage distribution control method and high voltage distribution control device Download PDFInfo
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- CN103419643A CN103419643A CN2013103198490A CN201310319849A CN103419643A CN 103419643 A CN103419643 A CN 103419643A CN 2013103198490 A CN2013103198490 A CN 2013103198490A CN 201310319849 A CN201310319849 A CN 201310319849A CN 103419643 A CN103419643 A CN 103419643A
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Abstract
The invention discloses a high voltage distribution control device which comprises a high voltage distribution control module. The high voltage distribution control module is respectively connected to a point A between a fuse and a contactor of a high voltage loop of an electric vehicle, a point B between the high voltage distribution box contactor and a load, and a point C between the load and the negative electrode of a power battery pack of the electric vehicle through three connection lines; an external port of the high voltage distribution control module is connected with an external control unit of the electric vehicle through a connection line. The high voltage distribution control module carries out sampling on the voltage UAC between the point A and the point C, the voltage UBC between the point B and the point C and the voltage Ubat of the power battery pack, and judges the states of the contactor and the fuse by comparing values of the sampled values.
Description
Technical field
The present invention relates to the mechano-electronic field, refer to especially a kind of high voltage power distribution control method and device thereof.
Background technology
Electronlmobil be take vehicle power as power, adopts the high voltage drive motor, and operating voltage, from tens to more than 600V,, considerably beyond the scope of safety voltage, once cause danger, will cause irremediable consequence.In recent years, along with the generation of various countries' electronlmobil combustion incident, the safety of electronlmobil and guard technology have caused showing great attention to of people gradually, and the safety and reliability problem of electric automobile high-voltage electric system can not be ignored.
Electronlmobil is as a high-voltage electric system, multiple high-tension apparatus, consist of, aging, the factor such as make moist of the electric leakage that high-tension apparatus may exist, electrokinetic cell corrosive liquid or gas and high-voltage cable insulating medium and electric coupler all can affect the insulating power between high tension loop and electric chassis.In general, the insulating power index of electronlmobil is mainly weighed with the insulation resistance between total just, the total negative and electric chassis of electrokinetic cell, GB in the security requirement to electronlmobil clear method of inspection and the safety indexes of insulation resistance.In standard, the regulation insulating resistance value is divided by the nominal voltage U of power accumulator, and the power battery insulation resistance minimum value obtained need be greater than 100 Ω/V just can think that it meets insulating requirements.So, in the vehicle use procedure, need monitoring insulation resistance in real time, it is strict controlled under human safety voltage and electric current, guarantee insulation safety, also to avoid vehicle when electric leakage or short circuit harm occur, human body to be endangered simultaneously.
The road conditions of travelling of electronlmobil complexity, make the harm such as it is often jolted, vibrates, impact, and it is the same with conventional truck, also needs periodic inspection, care and maintenance, and each parts in the high-voltage electrical apparatus loop must carry out periodic inspection and maintenance on request.But in the long-time use procedure of vehicle, restriction due to the mechanical connecting structure between each parts and process operation mode, and in maintenance process, may occur because of human negligence, misoperation or safeguard the problem of bringing that waits not in time, capital has influence on tightness and the reliability of high tension loop median generatrix adaptor union or connecting portion, cause bad contact, cause the power loop horsepower output to descend, the connecting portion heating is even burnt, not only reduce the safety and reliability of high-pressure system, even had influence on personal safety as well as the property safety.
Although the improvement along with physical construction, adopt high-voltage interlocking device or bayonet type to connect and greatly improved connection reliability, but in high tension loop or exist some that cause because of discovery in time may affect safe problem, for example, high voltage connector contact adhesion problem, and the events such as the fuse caused burns, joint area sparking, spontaneous combustion of becoming flexible because of adaptor union that happen occasionally in recent years.So, be necessary very much the High-Voltage Insulation safety in the electronlmobil use procedure and loop connection reliability are carried out to Real-Time Monitoring.
Summary of the invention
In view of this, the object of the invention is to propose a kind of high voltage power distribution control method and device thereof.This high voltage distribution installation can provide for the high voltage power distribution of battery-driven car a kind of safer mode, adopts the method can make the high voltage power distribution of battery-driven car safer.
Based on above-mentioned purpose a kind of high voltage power distribution control setup provided by the invention, it is characterized in that, comprise the high voltage power distribution control module; Described high voltage power distribution control module is connected in the fuse of battery-driven car high tension loop and 1 C between 1 B, load and power battery of electric vehicle group negative pole between 1 A, high-tension distribution box contactless switch and load between contactless switch by three wiring respectively, and its external interface is connected with the external control unit of battery-driven car by wiring simultaneously; Voltage U between the described sampling of high voltage power distribution control module A, C point
ACAnd the voltage U between B, C point
BCAnd described power battery voltage U
bat, and judge the state of described contactless switch and fuse by the magnitude of voltage of more described sampling.
Optionally, described high voltage power distribution control module comprises that power relay output controls submodule, communication submodule, voltage detecting submodule, insulation resistance detection sub-module, break-make detection sub-module, controller; Described output control submodule, communication submodule, voltage detecting submodule, insulation resistance detection sub-module, break-make detection sub-module are connected with described controller respectively; When the described contactless switch of judgement and fuse state, carry out following steps: described controller powers on; Described controller carries out self check; Described communication submodule sends to described external control unit to the self check state; Described controller is waited for the control command that receives described external control unit; Described controller receives the control command of described external control unit; Described controller is resolved and is judged described control command; Described voltage detecting submodule and break-make detection sub-module are according to described control command sampling U
AC, U
BCAnd described U
bat, and judge the state of described contactless switch and fuse according to sample voltage value; Described communication submodule sends to described external control unit by the state of described contactless switch and fuse; Described communication submodule receives the decision instruction that described external control unit sends, and according to described decision instruction, carries out corresponding operating.
Optionally, described voltage detecting submodule and break-make detection sub-module are according to described control command sampling U
AC, U
BCAnd described U
batAnd while according to sample voltage value, judging the state of described contactless switch and fuse, if described control command control contactor closure, described break-make submodule is set to the first judgement state, judges the mode of operation of described fuse and contactless switch by carrying out following step: described voltage detecting submodule detects described U
bat, described break-make detection sub-module detects described U
ACAnd described U
BCIf U
ACAnd U
batEquate, controller judgement fuse is normal; If U
ACAnd U
batUnequal controller judgement fuse damages; If fuse is normal and U
BCAnd U
batEquate, controller judgement contactless switch is normal.
Optionally, described voltage detecting submodule and break-make detection sub-module are according to described control command sampling U
AC, U
BCAnd described U
batAnd while according to sample voltage value, judging the state of described contactless switch and fuse, if described control command control contactor disconnects, described break-make submodule is set to the second judgement state, judges the mode of operation of described fuse and contactless switch by carrying out following step: described voltage detecting submodule detects described U
bat, described break-make detection sub-module detects described U
ACAnd described U
BCIf U
ACAnd U
batEquate, controller judgement fuse is normal; If fuse is normal and U
BCAnd U
batEquate, controller judgement contactless switch is abnormal; If U
BC=0, controller judgement contactless switch is normal.
Optionally, also comprise the first resistance, the first switch, the second resistance, second switch; Described the first resistance and the series connection of the first switch, be connected between the power battery pack positive pole and battery-driven car electricity chassis of battery-driven car high tension loop; Described the second resistance and second switch series connection, be connected between the power battery pack negative pole and battery-driven car electricity chassis of battery-driven car high tension loop; The measurement of described insulation resistance detection module flow through the first resistance the first current value, flow through the second current value of the second resistance, and calculate insulation resistance between the anodal and described electric chassis of described power battery pack and the insulation resistance between described power battery pack negative pole and described electric chassis in conjunction with the first resistance, the second resistance.
Optionally, described communication submodule comprises input and output submodule, CAN(controller local area network) the communication submodule; Described CAN communication submodule carries out communication by CAN bus and external control unit.
Further, the invention provides a kind of high voltage power distribution control method, adopt the high voltage power distribution control module to be connected in the fuse of battery-driven car high tension loop and 1 C between 1 B, load and power battery of electric vehicle group negative pole between 1 A, high-tension distribution box contactless switch and load between contactless switch by three wiring respectively, its external interface is connected with the external control unit of battery-driven car by wiring simultaneously; Voltage U between the described sampling of high voltage power distribution control module A, C point
ACAnd the voltage U between B, C point
BCAnd described power battery voltage U
bat, and judge the state of described contactless switch and fuse by the magnitude of voltage of more described sampling.
Optionally, when the described contactless switch of judgement and fuse state, carry out following steps: described controller powers on; Described controller carries out self check; Described communication submodule sends to described external control unit to the self check state; Described controller is waited for the control command that receives described external control unit; Described controller receives the control command of described external control unit; Described controller is resolved and is judged described control command; Described voltage detecting submodule and break-make detection sub-module are according to described control command sampling U
AC, U
BCAnd described U
bat, and judge the state of described contactless switch and fuse according to sample voltage value; Described communication submodule sends to described external control unit by the state of described contactless switch and fuse; Described communication submodule receives the decision instruction that described external control unit sends, and according to described decision instruction, carries out corresponding operating.
Optionally, described voltage detecting submodule and break-make detection sub-module are according to described control command sampling U
AC, U
BCAnd described U
batAnd while according to sample voltage value, judging the state of described contactless switch and fuse, if described control command control contactor closure, described break-make submodule is set to the first judgement state, judges the mode of operation of described fuse and contactless switch by carrying out following step: described voltage detecting submodule detects described U
bat, described break-make detection sub-module detects described U
ACAnd described U
BCIf U
ACAnd U
batEquate, controller judgement fuse is normal; If U
ACAnd U
batUnequal controller judgement fuse damages; If fuse is normal and U
BCAnd U
batEquate, controller judgement contactless switch is normal.
Optionally, described voltage detecting submodule and break-make detection sub-module are according to described control command sampling U
AC, U
BCAnd described U
batAnd while according to sample voltage value, judging the state of described contactless switch and fuse, if described control command control contactor disconnects, described break-make submodule is set to the second judgement state, judges the mode of operation of described fuse and contactless switch by carrying out following step: described voltage detecting submodule detects described U
bat, described break-make detection sub-module detects described U
ACAnd described U
BCIf U
ACAnd U
batEquate, controller judgement fuse is normal; If fuse is normal and U
BCAnd U
batEquate, controller judgement contactless switch is abnormal; If U
BC=0, controller judgement contactless switch is normal.
Optionally, also detect as follows insulation resistance: the measurement of insulation resistance detection module flow through the first resistance the first current value, flow through the second current value of the second resistance, and calculate insulation resistance between the anodal and described electric chassis of described power battery pack and the insulation resistance between described power battery pack negative pole and described electric chassis in conjunction with the first resistance, the second resistance; Described the first resistance and the series connection of the first switch, be connected between the power battery pack positive pole and battery-driven car electricity chassis of battery-driven car high tension loop; Described the second resistance and second switch series connection, be connected between the power battery pack negative pole and battery-driven car electricity chassis of battery-driven car high tension loop.
As can be seen from above, high voltage power distribution method provided by the invention, can detect the quality of the interior fuse of high-tension distribution box and contactless switch, and the reliability of judgement high tension loop connection, can be used in electric automobile high-voltage system or high voltage distribution installation, for the safety issue of electronlmobil provides early warning.High voltage distribution installation provided by the present invention, adopt above-mentioned high voltage power distribution method, can improve the safety and reliability of electronlmobil.Simultaneously, high voltage power distribution module provided by the invention is provided with insulation resistance and detects, the CAN communication, and power relay is controlled the functions such as output, when improving the electric automobile high-voltage safe distribution of electric power, reduced greatly the external control wire harness of contactless switch in the distribution equipment.
The accompanying drawing explanation
The fuse that Fig. 1 is the embodiment of the present invention and contactless switch detect principle schematic;
The sub modular structure schematic diagram of the high voltage power distribution control module that Fig. 2 is the embodiment of the present invention;
The insulation resistance that Fig. 3 is the embodiment of the present invention detects principle schematic;
The high voltage power distribution control method schematic flow sheet that Fig. 4 is the embodiment of the present invention.
The specific embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and, with reference to accompanying drawing, the present invention is described in more detail.
The high voltage distribution installation that the embodiment of the present invention provides, comprise the high pressure control Power entry module.There are a plurality of high tension loops in battery-driven car, such as electric machine controller loop, DC/DC loop (DC-to-DC loop), air conditioner loop etc.The source region that high-tension distribution box distributes as car load battery pack energy source secondary, integrated fuse and the contactless switch of each high tension loop.
Generally, the contactless switch in the battery-driven car high-tension distribution box and fuse are respectively equipped with 6 groups, and the detection of 6 groups of contactless switchs and fuse can adopt same circuit.In the embodiment shown in fig. 1, only embody the testing circuit of one group of contactless switch and fuse.
High voltage power distribution control setup in following embodiment comprises the high voltage power distribution module, the principle of this module detection fuse and contactless switch as shown in Figure 1, comprises power battery pack 1, fuse 2, contactless switch 3, load 4, high pressure control Power entry module 5, high-tension distribution box 6.Wherein, fuse 2, contactless switch 3, load 4 are connected and three's circuit series is connected with battery pack 1 successively.If have in wiring between fuse 2 and contactless switch 3, be some A, between contactless switch 3 and load 4, in wiring, having is some B, and between the negative pole of load 4 and power battery pack 1, in wiring, having is some C; High pressure control Power entry module 5 adopts wiring to be connected to A, B, C 3 points.Contactless switch 3 is the electromagnetic relays that comprise contact switch and control coil, and wherein, described contact switch two ends are connected in A, B point, and described control coil two ends are connected in the power relay output of high pressure control Power entry module 5 by wiring; Simultaneously, the external interface of high pressure control Power entry module 5 is connected with external control unit (as entire car controller or instrument desk) by wiring.Concrete, described load can be the equipment such as electric machine controller, direct supply, air-conditioning in actual applications.
In the present embodiment, the constructional drawing of high pressure control Power entry module 5 as shown in Figure 2.Comprise power relay output control submodule 51, communication submodule, voltage detecting submodule 54, insulation resistance detection sub-module 55, break-make detection sub-module 56, controller 57.Described communication submodule further comprises input and output submodule 52, CAN communication submodule 53.The end that submodule 51, input and output submodule 52, CAN communication submodule 53, voltage detecting submodule 54, insulation resistance detection sub-module 55, break-make detection sub-module 56 are controlled in power relay output is connected with controller 57 respectively.Power relay is controlled output sub-module 51 by the contactless switch shown in an internal connector connection diagram 1.Input and output submodule 52, CAN communication submodule 53 are connected with described external control unit by corresponding interface.Voltage detecting submodule 54 connects the both positive and negative polarity of described power battery pack.Insulation resistance detection sub-module 55 is connected with power battery pack both positive and negative polarity, electric chassis.A, B shown in break-make detection sub-module 56 connection diagrams 1, C 3 points.
In the present embodiment, the existing condition of fuse 2 and contactless switch 3 is mainly realized by above-mentioned voltage detection module and break-make detection sub-module.Described insulation resistance detection module and voltage detection module realize jointly.
Described break-make detection sub-module comprises interconnective detection interface, the first resitstance voltage divider, isolated amplifier, the first D and A converter successively.Described detection interface at least is provided with three, respectively A, B, C 3 points shown in connection diagram 1.Described the first resitstance voltage divider gathers voltage from its point of connection respectively by described detection interface, and the voltage signal of collection is processed through isolated amplifier and the first D and A converter, is sent to described controller.
Described voltage detecting submodule comprises voltage sample interface, the second resitstance voltage divider, isolation sampler, the second D and A converter.Described voltage sample interface at least is provided with two, connects respectively the positive and negative electrode of power battery pack.Described the second resitstance voltage divider gathers voltage by described voltage sample interface at its point of connection, and the voltage signal of collection, through the processing of isolation sampler, the second D and A converter, is sent to described controller.
Described insulation resistance detection sub-module comprises that the insulation resistance connected successively detects interface, Hall element, resistance sampling device, op amp in the present embodiment.
Above the second D and A converter of the first D and A converter of described break-make detection sub-module and voltage detection module all belong to the AD sampling module of controller 57 self.Described detection interface detects voltage signal from described A, B, C point, and described voltage signal passes through the processing of described the first resitstance voltage divider, isolated amplifier, the first D and A converter successively, is transferred to described controller 57.
Under described high tension loop normal operation, to each road high tension loop in switch box, the voltage U of ordering by real-time detection A point and C
ACThe voltage U of ordering with B point and C
BC, then can obtain the existing condition of fuse 2 and contactless switch 3 in conjunction with the state of a control of contactless switch 3, by its therewith the fuse under state of a control and contactless switch should in state compare judgement, determine the quality of fuse and contactless switch.In a certain described high tension loop, if have the loosening situation of adapter connector, contact resistance R herein must become large, when the electric current I by certain, fall when the voltage U of joint area must be than normal connection and increase, can judge accordingly the situation that whether has the adaptor union virtual connection in loop.
No matter contactless switch 3 is in closure or off-state, if fuse 2 (path) working properly, the U recorded
ACThe voltage of voltage ≈ power battery pack 1 (abbreviation battery voltage).If fuse 2 damages (opening circuit), the U recorded
ACVoltage ≠ battery voltage, concrete: when load 4 while being resistive, U
AC=0.When load is capacitive or perception or Combination load, U
AC<battery voltage, and can slowly be reduced to 0, U
ACThe size variation situation is subject to load effect.
As can be seen from above, by measuring U
ACVoltage can judge that whether fuse 2 is normal.
Work as voltage U
BCDuring the ≈ cell pressure, illustrate that fuse 2 is in path, and contacts of contactor should be in closure state, if now the contactless switch control command is closed, normal, if now control command is for disconnecting, the existing condition of contactless switch 3 and its should have state not to be inconsistent, and contactless switch 3 exists contact adhesion or control path that problem is arranged.
Work as voltage U
BC=0 or U
BCDuring<battery voltage, illustrate that contactless switch is in off-state, or the fuse damage is if now the contactless switch control command is disconnection, normal in open circuit, if now control command is closed, contactless switch or fuse have at least one to damage.
As can be seen from above, the break-make detection module of the present embodiment is by measuring voltage U
BC, and inquiry contactless switch control command, can judge that whether the state of contactless switch 3 or fuse 2 is normal.
Suppose, power battery pack 1 total just and the joint on the connection line between the fuse 2 of high-tension distribution box 6 have virtual connection, contact resistance certainly will increase, in the situation that electric current is certain, according to Ohm's law, the voltage ratio that this joint area produces will increase under normal circumstances, and electric current is larger, the virtual connection situation is more serious, and change of voltage is also larger.Adaptor union or joint area voltage increase, and can cause the U in loop
ACAnd U
BCThan under normal circumstances, reduce, rangeability is subject to the impact of electric current and the virtual connection order of severity.If when normal operation, to the U under different electric currents
ACAnd U
BCValue demarcated, during real work just can by with U
ACAnd U
BCSampled instantaneous value contrasted, judge whether to have the virtual connection situation.The method is applicable to judge the connection reliability problem of other position joints of high tension loop or adaptor union.
Have insulation resistance between the both positive and negative polarity of the described power battery pack of Fig. 1 and vehicle electrical chassis, under normal condition, described insulation resistance is in a number range.The insulation resistance that Fig. 3 is the embodiment of the present invention detects schematic diagram.
The first switch S 1 that connects the first resistance R 1 and connect with R1 between the anodal and electric chassis of power battery pack 1, connection the second resistance R 2 and the second switch S2 that connects with R2 between the negative pole of power battery pack 1 and electric chassis.If the anodal insulation resistance with electric chassis of power battery pack 1 is R+, the insulation resistance on negative pole and electric chassis is R-; When the S1 closure, when S2 opens, after R1 and R+ parallel connection, with R-, to connect, the upper electric current of R1 is I1, when the S2 closure, when S1 opens, after R2 and R-parallel connection, with R+, connects, and the upper electric current of R2 is I2, and I1 and I2 sense of current are as shown in Figure 3.
Suppose that cell pressure is U
bat, R+=Rx, R-=R
y, have:
I1*R1/Rx+I1=(U
bat-I1*R)/Ry formula 1
I2*R2/Ry+I2=(U
bat-I2R2)/Rx formula 2
Therefore, as long as sampling obtains I1, I2, U
batValue, the set of equations that just can form by solution formula 1,2 obtain the value of Rx, Ry, i.e. R+, R-.Under normal circumstances, insulation resistance R+, R-are in mega-ohms, and now, I1 and I2 are at microampere order; When insulation resistance is 0, I1 and I2 will be in the milliampere levels.So, also can judge quickly and easily the in-scope of insulation resistance value according to current value I 1, I2, power battery pack insulation safety state is made to the judgement held water.
As an embodiment, the insulation resistance detection sub-module is set in the high voltage power distribution control setup, comprise that the insulation resistance connected successively detects interface, Hall element, resistance sampling device, op amp.Described insulation resistance detects interface and is provided with two, connects respectively described the first resistance R 1 and the second resistance R 2.Under running state of electric motor car, described Hall element is by the current signal on described insulation resistance detection interface detection R1 and the current signal on R2, this current signal is through the processing of resistance sampling device and op amp, obtain the actual value of described I1 and I2, and the value of actual I1 and I2 is sent to described controller carries out the computing judgement.
The concrete battery-driven car model of take in practical application is example, certain model 336V pure electric automobile high-tension distribution box is produced in Zhengzhou daily, comprise the electric machine controller major loop, DC/AC loop (AC/DC loop), DC/DC loop (DC-DC loop), air-conditioning/warm braw loop, totally 5 fuses and 6 contactless switchs.Adopt high voltage power distribution control module of the present invention, detect total just, the total negative insulation resistance to the vehicle electrical chassis of high voltage power distribution, the judgement insulating power, the quality of detection case Nei Ge road fuse and contactless switch, and control the break-make of each road high voltage connector by the CAN bus communication.Pass through actual survey, adopt the present invention can find in time the decreasing insulating problem in high tension loop, providing insulation fault reports to the police, can correctly judge in-problem fuse and contactless switch by the detection of fuse and contactless switch, and can the indirect detection switch box outer loop connection reliability problem that may exist, adopt the CAN bus communication to control high voltage connector, reduced the control wire harness of 6 external tentaculums of case, and improved the signal anti-interference resistance.
Except the battery-driven car of above-mentioned model, high voltage power distribution control setup of the present invention can also be applied in other battery-driven car in a similar fashion.
As can be seen from above, high voltage distribution installation provided by the present invention, the high voltage power distribution control module is set, by detecting the voltage between difference in high tension loop, judge the quality of fuse and contactless switch in the battery-driven car high tension loop, can effectively detect under the different situations condition, the running state of fuse, contactless switch in high tension loop, have higher reliability and accuracy.Simultaneously, the insulation resistance detection module of the high voltage distribution installation of the embodiment of the present invention, cut successively sampling resistor by master cock between power battery pack both positive and negative polarity and electric chassis, whether detect resistance value between power battery pack and electric chassis in normal range, can effectively detect the insulation safety state of power battery pack, improve the safety of battery-driven car.
Further, the invention provides a kind of high voltage power distribution control method, the method is detected the fuse in high-tension distribution box and contactless switch mode of operation in the process of battery-driven car operation, mainly comprises the following steps shown in Fig. 4:
Step 31: power on.In this step, after the battery-driven car key switch is opened, each low-voltage equipment of electric vehicle system powers on, and the high voltage power distribution control module of the present embodiment powers on, and its controller powers on.
Step 32: self check.After powering on, described controller first carries out self check, to prepare operation.
Step 33: by the CAN bus, send mode of operation.The described high voltage power distribution control setup of the embodiment of the present invention thereon the electricity, complete self check after, its CAN communication submodule sends to the external control unit to the self check state by the CAN bus.After the system electrifying startup, the high voltage power distribution control setup of the present embodiment detects according to certain loop cycle, if circulation first, described mode of operation refers to the self check state of step 32 middle controller; If not circulation first, described mode of operation is in last round of circulation, the normal or error state of detected fuse and contactless switch.
Step 34: wait for and receive control command.Described external control unit, according to self check state and the external control needs of the high voltage power distribution control setup of the present embodiment, sends the controller of corresponding control command to the present embodiment mesohigh distribution control device by the CAN bus.
Step 35: resolve and judge control command.Control corresponding IO interface output control command according to described control command, this control command is specially level, is called control level, can be high level or low level, if described control level control contactor closure enters step 36; If described control level control contactor disconnects, enter step 37.The high level that the high voltage power distribution control setup is exported or low level are for controlling the switch of corresponding contact device.
Step 36: be set to the first judgement state.If have in wiring between fuse 2 and contactless switch 3, be some A, between contactless switch 3 and load 4, in wiring, having is some B, and between the negative pole of load 4 and power battery pack 1, in wiring, having is some C.In this step, the voltage detection module of high voltage power distribution control setup is sampled to the voltage of power battery of electric vehicle group, and the break-make detection module is to the voltage U between described A, C point
ACAnd the voltage U between B, C point
BCSampled, and according to the state of sample voltage value and control command judgement fuse and contactless switch.Jump to step 38.
Step 37: be set to the second judgement state.The state of fuse and contactless switch is set to the second judgement state.Jump to step 38.
Step 38: through the CAN bus, send state.CAN communication submodule sends to described external control unit by the state of fuse and contactless switch by the CAN bus.
If the state that the external control unit sends by CAN communication submodule judgement fuse and contactless switch are normal, enter the next round circulation, return to step 34 and continue to carry out.Cycle detection is monitored in real time the normal circumstances of fuse and contactless switch in whole working process with the assurance system.If judgement fuse or contactless switch break down in loop detection process, according to failure condition, process accordingly.
Concrete, step 36 can be carried out according to following process:
Step 361: sampled voltage.In the present embodiment, the voltage detecting submodule is sampled to the voltage of power battery of electric vehicle group, is designated as U
batThe break-make detection sub-module detects described U
ACAnd described U
BC.
Step 362: compare U
ACAnd U
batAnd U
BCAnd U
batTo obtain the mode of operation of fuse and contactless switch.Concrete, if U
ACAnd U
batEquate, controller judgement fuse is normal; If U
ACAnd U
batUnequal controller judgement fuse damages; In the normal situation of judgement fuse, if U
BCAnd U
batEquate, controller judgement contactless switch is normal.
Concrete, step 37 can be carried out according to following process:
Step 371: sampled voltage.In the present embodiment, described voltage detecting submodule sampling U
batThe break-make detection sub-module detects described U
ACAnd described U
BC.
Step 372: compare U
ACAnd U
batAnd U
BCAnd U
batTo obtain the mode of operation of fuse and contactless switch.Concrete, if U
ACAnd U
batEquate, controller judgement fuse is normal; In the normal situation of judgement fuse, if U
BCAnd U
batEquate, controller judgement contactless switch existing problems, abnormal; If U
BC=0, controller judgement contactless switch is normal.
Take and control the electric machine controller contactless switch and again be described as follows as example: after system powers on, the present embodiment module is carried out self check, and the self check state is sent to the external control unit by the CAN bus.The external control unit receives the self check normal signal, send to control electric machine controller contactless switch close command, after the present embodiment module receives, and power ratio control relay output interface output high level, closed contactless switch detects after the contactless switch closure U in high tension loop simultaneously
ACAnd U
BC, further judge that whether contactless switch is closed, and judge whether to exist loop virtual connection or fuse damaged condition.If the external control unit receives abnormal signal, send electric machine controller contactless switch open command, and according to described abnormal signal instruction, vehicle is processed accordingly.
In the process of described fuse and the judgement of contactless switch cycle detection, the external control unit also can send insulation resistance and detect the controller of instruction to described high voltage power distribution control setup, described controller is controlled described insulation resistance detection module insulation resistance is detected, after specifically comprising the steps: that the insulation resistance detection module receives insulation resistance detection instruction, the first current value of the first resistance is flow through in measurement, flow through the second current value of the second resistance, and in conjunction with the first resistance, the second resistance calculates insulation resistance between the anodal and described electric chassis of described power battery pack and the insulation resistance between described power battery pack negative pole and described electric chassis.
As can be seen from above, high voltage power distribution method provided by the invention, can detect the quality of the interior fuse of high-tension distribution box and contactless switch, and the reliability of judgement high tension loop connection, can be used in electric automobile high-voltage system or high voltage distribution installation, for the safety issue of electronlmobil provides early warning.High voltage distribution installation provided by the present invention, adopt above-mentioned high voltage power distribution method, can improve the safety and reliability of electronlmobil.Simultaneously, high voltage power distribution module provided by the invention, be provided with insulation resistance and detect, and has the functions such as CAN Communication Control, power relay output control, when improving the electric automobile high-voltage safe distribution of electric power, reduced greatly the external control wire harness of contactless switch in the distribution equipment.
Those of ordinary skill in the field are to be understood that: the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a high voltage power distribution control setup, is characterized in that, comprises the high voltage power distribution control module; Described high voltage power distribution control module is connected in the fuse of battery-driven car high tension loop and 1 C between 1 B, load and power battery of electric vehicle group negative pole between 1 A, high-tension distribution box contactless switch and load between contactless switch by three wiring respectively, and its external interface is connected with the external control unit of battery-driven car by wiring simultaneously; Voltage U between the described sampling of high voltage power distribution control module A, C point
ACAnd the voltage U between B, C point
BCAnd described power battery voltage U
bat, and judge the state of described contactless switch and fuse by the magnitude of voltage of more described sampling.
2. high voltage power distribution control setup according to claim 1, it is characterized in that, described high voltage power distribution control module comprises power relay output control submodule, input and output submodule, communication submodule, voltage detecting submodule, insulation resistance detection sub-module, break-make detection sub-module, controller; Described output control submodule, communication submodule, voltage detecting submodule, insulation resistance detection sub-module, break-make detection sub-module are connected with described controller respectively; When the described contactless switch of judgement and fuse state, carry out following steps:
Described controller powers on;
Described controller carries out self check;
Described communication submodule sends to described external control unit to the self check state;
Described controller is waited for the control command that receives described external control unit;
Described controller receives the control command of described external control unit;
Described controller is resolved and is judged described control command;
Described voltage detecting submodule and break-make detection sub-module are according to described control command sampling U
AC, U
BCAnd described U
bat, and judge the state of described contactless switch and fuse according to sample voltage value;
Described communication submodule sends to described external control unit by the state of described contactless switch and fuse.
3. high voltage power distribution control setup according to claim 2, is characterized in that, described voltage detecting submodule and break-make detection sub-module are according to the described control command described U that samples
AC, U
BCAnd U
batAnd while according to sample voltage value, judging the state of described contactless switch and fuse, if described control command control contactor closure, described break-make submodule is set to the first judgement state, judges the mode of operation of described fuse and contactless switch by carrying out following step:
Described voltage detecting submodule detects described U
bat, described break-make detection sub-module detects described U
ACAnd described U
BC
If U
ACAnd U
batEquate, controller judgement fuse is normal; If U
ACAnd U
batUnequal controller judgement fuse damages; If fuse is normal and U
BCAnd U
batEquate, controller judgement contactless switch is normal.
4. high voltage power distribution control setup according to claim 2, is characterized in that, described voltage detecting submodule and break-make detection sub-module are according to described control command sampling U
AC, U
BCAnd described U
batAnd while according to sample voltage value, judging the state of described contactless switch and fuse, if described control command control contactor disconnects, described break-make submodule is set to the second judgement state, judges the mode of operation of described fuse and contactless switch by carrying out following step:
Described voltage detecting submodule detects described U
bat, described break-make detection sub-module detects described U
ACAnd described U
BC
If U
ACAnd U
batEquate, controller judgement fuse is normal; If fuse is normal and U
BCAnd U
batEquate, controller judgement contactless switch is abnormal; If U
BC=0, controller judgement contactless switch is normal.
5. high voltage power distribution control setup according to claim 1, is characterized in that, also comprises the first resistance, the first switch, the second resistance, second switch; Described the first resistance and the series connection of the first switch, be connected between the power battery pack positive pole and battery-driven car electricity chassis of battery-driven car high tension loop; Described the second resistance and second switch series connection, be connected between the power battery pack negative pole and battery-driven car electricity chassis of battery-driven car high tension loop; The measurement of described insulation resistance detection module flow through the first resistance the first current value, flow through the second current value of the second resistance, and calculate insulation resistance between the anodal and described electric chassis of described power battery pack and the insulation resistance between described power battery pack negative pole and described electric chassis in conjunction with the first resistance, the second resistance.
6. a high voltage power distribution control method, it is characterized in that, adopt the high voltage power distribution control module to be connected in the fuse of battery-driven car high tension loop and 1 C between 1 B, load and power battery of electric vehicle group negative pole between 1 A, high-tension distribution box contactless switch and load between contactless switch by three wiring respectively, its external interface is connected with the external control unit of battery-driven car by wiring simultaneously; Voltage U between the described sampling of high voltage power distribution control module A, C point
ACAnd the voltage U between B, C point
BCAnd described power battery voltage U
bat, and judge the state of described contactless switch and fuse by the magnitude of voltage of more described sampling.
7. high voltage power distribution control method according to claim 6, is characterized in that, when the described contactless switch of judgement and fuse state, carries out following steps:
Described controller powers on;
Described controller carries out self check;
Described communication submodule sends to described external control unit to the self check state;
Described controller is waited for the control command that receives described external control unit;
Described controller receives the control command of described external control unit;
Described controller is resolved and is judged described control command;
Described voltage detecting submodule and break-make detection sub-module are according to described control command sampling U
AC, U
BCAnd described U
bat, and judge the state of described contactless switch and fuse according to sample voltage value;
Described communication submodule sends to described external control unit by the state of described contactless switch and fuse;
Described communication submodule receives the decision instruction that described external control unit sends, and according to described decision instruction, carries out corresponding operating.
8. high voltage power distribution control method according to claim 7, is characterized in that, described voltage detecting submodule and break-make detection sub-module are according to described control command sampling U
AC, U
BCAnd described U
batAnd while according to sample voltage value, judging the state of described contactless switch and fuse, if described control command control contactor closure, described break-make submodule is set to the first judgement state, judges the mode of operation of described fuse and contactless switch by carrying out following step:
Described voltage detecting submodule detects described U
bat, described break-make detection sub-module detects described U
ACAnd described U
BC
If U
ACAnd U
batEquate, controller judgement fuse is normal; If U
ACAnd U
batUnequal controller judgement fuse damages; If fuse is normal and U
BCAnd U
batEquate, controller judgement contactless switch is normal.
9. high voltage power distribution control method according to claim 7, is characterized in that, described voltage detecting submodule and break-make detection sub-module are according to described control command sampling U
AC, U
BCAnd described U
batAnd while according to sample voltage value, judging the state of described contactless switch and fuse, if described control command control contactor disconnects, described break-make submodule is set to the second judgement state, judges the mode of operation of described fuse and contactless switch by carrying out following step:
Described voltage detecting submodule detects described U
bat, described break-make detection sub-module detects described U
ACAnd described U
BC
If U
ACAnd U
batEquate, controller judgement fuse is normal; If fuse is normal and U
BCAnd U
batEquate, controller judgement contactless switch is abnormal; If U
BC=0, controller judgement contactless switch is normal.
10. high voltage power distribution control method according to claim 6, is characterized in that, also detects as follows insulation resistance:
After the insulation resistance detection module receives insulation resistance detection instruction, measurement flow through the first resistance the first current value, flow through the second current value of the second resistance, and calculate insulation resistance between the anodal and described electric chassis of described power battery pack and the insulation resistance between described power battery pack negative pole and described electric chassis in conjunction with the first resistance, the second resistance;
Described the first resistance and the series connection of the first switch, be connected between the power battery pack positive pole and battery-driven car electricity chassis of battery-driven car high tension loop; Described the second resistance and second switch series connection, be connected between the power battery pack negative pole and battery-driven car electricity chassis of battery-driven car high tension loop.
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| CN104020417A (en) * | 2014-06-26 | 2014-09-03 | 安徽江淮汽车股份有限公司 | Method and device for diagnosing binding fault of relay |
| CN105094019A (en) * | 2015-08-31 | 2015-11-25 | 广州供电局有限公司 | High-voltage power electronic control device and control method thereof |
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| CN108089056A (en) * | 2017-12-12 | 2018-05-29 | 中国汽车技术研究中心 | A kind of insulating test set and method of whole electric vehicle B grades of closed circuits |
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| CN111016656A (en) * | 2018-10-09 | 2020-04-17 | 上海汽车集团股份有限公司 | High-voltage interlocking detection circuit and detection method |
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| CN110712527A (en) * | 2019-10-22 | 2020-01-21 | 中国北方车辆研究所 | Capacitive load automatic charging and discharging integrated protection circuit of hybrid electric drive armored vehicle |
| WO2021197434A1 (en) * | 2020-04-01 | 2021-10-07 | 长城汽车股份有限公司 | Method and system for determining connection reliability of vehicle high-voltage loop |
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