CN104709091A - Power-on method and power-off method of full electric vehicle - Google Patents
Power-on method and power-off method of full electric vehicle Download PDFInfo
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- CN104709091A CN104709091A CN201310684620.7A CN201310684620A CN104709091A CN 104709091 A CN104709091 A CN 104709091A CN 201310684620 A CN201310684620 A CN 201310684620A CN 104709091 A CN104709091 A CN 104709091A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The invention discloses a power-on method and a power-off method of a full electric vehicle. The power-on method comprises the steps of controlling a pre-charging contactor to be closed to perform pre-charging according to a high voltage power-on command in a driving mode; judging whether pre-charging is complete in the first threshold time, and controlling a positive contactor to be closed under the condition that pre-charging is complete in the first threshold time; judging whether the positive contactor is closed, and disconnecting the pre-charging contactor under the condition that the positive contactor is closed; completing the power-on process. By adopting the power-on method and the power-off method of the full electric vehicle, faults which may occur in the power-on and power-off processes of the full electric vehicle are detected, the faults are reported under the condition of faults, thus the whole power-on process can be controlled according to various pieces of reported fault information by a vehicle controller, and the power-on and power-off processes of the full electric vehicle are more secure.
Description
Technical field
The present invention relates to battery-driven car, particularly, relate to a kind of powering method of pure electric vehicle and a kind of lower method for electrically of pure electric vehicle.
Background technology
Pure electric vehicle generally adopts the electrokinetic cell of more than 300V voltage now, at such high pressures, safety pure electric vehicle power on and lower method for electrically particularly important.Current pure electric vehicle power on and lower method for electrically does not consider numerous faults that pure electric vehicle powers on and may occur in lower electric process to have great potential safety hazard.
Summary of the invention
The object of this invention is to provide a kind of powering method of pure electric vehicle and a kind of lower method for electrically of pure electric vehicle, describedly to power on and lower method for electrically has fully taken into account the fault that pure electric vehicle powers on and may occur in lower electric process, and these faults are processed rapidly, pure electric vehicle is powered on and lower electric process safer.
To achieve these goals, the powering method of pure electric vehicle provided by the invention comprises: under driving pattern: powering on according to high pressure, to control pre-charge contactor closed to carry out precharge in instruction; Judge whether precharge completes within the first threshold time, control positive contact device when completing precharge within the first threshold time and close; Judge whether positive contact device is closed, disconnect pre-charge contactor when positive contact device is closed; And complete power up.
Preferably, the scope of described first threshold time is 1s-3s.
Wherein, when not completing precharge within the first threshold time, stop precharge, carry out fault simultaneously and report.
Wherein, when positive contact device is not closed, disconnects pre-charge contactor, carry out fault simultaneously and report.
Preferably, whether this powering method also comprises detection high-tension battery has charging wire to access, and enters driving pattern when high-tension battery accesses without charging wire; And enter charge mode when high-tension battery has charging wire to access.
The lower method for electrically of pure electric vehicle provided by the invention comprises: carry out electric machine controller three phase short circuit process according to instruction electric under high pressure; Judge whether three phase short circuit process completes within the Second Threshold time, when completing three phase short circuit process within the Second Threshold time, carry out Insulation monitoring; Judge whether to there is insulation fault, when there is not insulation fault, electric under performing high pressure; Judge whether positive contact device and cathode contact device have at least one to disconnect, when positive contact device and cathode contact device have at least one to disconnect, perform active discharge; Electric under performing low pressure; And complete lower electric process.
Preferably, the scope of Second Threshold time is 1s-2s.
Wherein, when not completing described three phase short circuit process within the Second Threshold time, electric under performing high pressure, carry out fault simultaneously and report.
Wherein, when there is insulation fault, electric under performing high pressure, carry out fault simultaneously and report.
Wherein, when positive contact device and cathode contact device all do not disconnect, electric under performing low pressure, carry out fault simultaneously and report.
Powering on and lower method for electrically according to pure electric vehicle provided by the invention, following committed step is performed: whether 1) detect high-tension battery has charging wire to access (enter driving pattern when high-tension battery accesses without charging wire, enter charge mode when high-tension battery has charging wire to access) in pure electric vehicle power up; 2) when entering driving pattern, control pre-charge contactor closed to carry out precharge, judge at first threshold time (1s-2s, the present invention preferably but be not limited to 2s) whether interior precharge complete, control positive contact device when completing precharge within the first threshold time to close, stop precharge when not completing precharge within the first threshold time, carry out fault simultaneously and report; 3) judge whether positive contact device is closed, disconnect pre-charge contactor when positive contact device is closed, disconnect pre-charge contactor when positive contact device is not closed, carry out fault simultaneously and report.
Following committed step is performed in electric process: 1) carry out electric machine controller three phase short circuit process according to instruction electric under high pressure under pure electric vehicle, judge at Second Threshold time (1s-2s, the present invention preferably but be not limited to 1s) whether interior three phase short circuit process complete, Insulation monitoring is carried out three phase short circuit process completes within the Second Threshold time, electric under performing high pressure described three phase short circuit process does not complete within the Second Threshold time, carry out fault simultaneously and report; 2) judge whether to there is insulation fault, electric perform high pressure when there is not insulation fault under, carry out fault while electric perform high pressure when there is insulation fault under and report; 3) judge whether positive contact device and cathode contact device have at least one to disconnect, when positive contact device and cathode contact device have at least one to disconnect, perform active discharge, and electricity perform low pressure after active discharge completes under, electric perform low pressure when positive contact device and cathode contact device all do not disconnect under, carry out fault simultaneously and report.
Pure electric vehicle provided by the invention power on and lower method for electrically powers on to pure electric vehicle and the fault that may occur in lower electric process detects, carry out fault in case of a failure to report, the failure message that entire car controller can report according to each thus controls whole power up, power on to make pure electric vehicle and lower electric process safer.
Other features and advantages of the present invention are described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification sheets, is used from explanation the present invention, but is not construed as limiting the invention with detailed description of the invention one below.In the accompanying drawings:
Fig. 1 is the diagram of circuit of the powering method of pure electric vehicle provided by the invention; And
Fig. 2 is the diagram of circuit of the lower method for electrically of pure electric vehicle provided by the invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
Fig. 1 is the diagram of circuit of the powering method of pure electric vehicle provided by the invention.As shown in Figure 1, under driving pattern: powering on according to high pressure, to control pre-charge contactor closed to carry out precharge in instruction; Judge whether precharge completes within the first threshold time, control positive contact device when completing precharge within the first threshold time and close, precharge not yet completes within the first threshold time, stop precharge, carry out fault simultaneously and report; Judge whether positive contact device is closed, disconnect pre-charge contactor when positive contact device is closed, disconnect pre-charge contactor when positive contact device is not closed, carry out fault simultaneously and report; And complete power up.
The described first threshold time can be arranged according to the needs of practical operation, and preferably, the scope of described first threshold time is 1s-3s, and more preferably, the described first threshold time is 2s.
According to technical scheme of the present invention, when battery management system receive high pressure power on instruction time, first control pre-charge contactor closed to carry out precharge, then to judge in 2s whether precharge completes and (such as when high-tension battery voltage reaches 85% of total voltage, then determine that precharge completes.Preferably, when high-tension battery voltage reaches 90% of total voltage, then determine that precharge completes), if precharge completes in the first threshold time, then battery management system control positive contact device closes, if precharge not yet completes in the first threshold time, then stop precharge, reporting fault also stops connecting high pressure simultaneously; After battery management system control positive contact device is closed, judge whether positive contact device is closed, when positive contact device is not closed, battery management system judges the connection failure of positive contact device, and disconnect pre-charge contactor, carry out fault report, simultaneously stop connect high pressure, when positive contact device is closed, battery management system disconnects pre-charge contactor, completes power up afterwards.
Powering method mentioned above carries out under the driving pattern of pure electric vehicle, if pure electric vehicle is in charge mode, then without the need to performing above-mentioned detecting step.Therefore, preferably, before carrying out the above-mentioned step that powers on, each controller need carry out conventional self-inspection, and by self-inspection information reporting entire car controller, under battery management system does not detect out of order situation, whether powering method provided by the invention also comprises detection high-tension battery has charging wire to access, and enters driving pattern when high-tension battery accesses without charging wire; And enter charge mode when high-tension battery has charging wire to access.
According to technical scheme of the present invention, when entering charge mode, first battery management system control cathode contact device closes, and judge whether cathode contact device closes, when cathode contact device is closed, battery management system controls pre-charge contactor and closes to carry out precharge, carries out fault report when cathode contact device is not closed, and stops connecting high pressure; Then to judge within the first threshold time (such as 2s) whether precharge completes and (such as when high-tension battery voltage reaches 85% of total voltage, then determine that precharge completes.Preferably, when high-tension battery voltage reaches 90% of total voltage, then determine that precharge completes), within the first threshold time, precharge completes, battery management system controls positive contact device and closes, then stop precharge precharge not yet completes within the first threshold time, reporting fault also stops connecting high pressure simultaneously; After battery management system control positive contact device is closed, judge whether positive contact device is closed, when positive contact device is closed, battery management system disconnects pre-charge contactor, and it is closed to control charging contactor, when positive contact device is not closed, battery management system judges the connection failure of positive contact device, and disconnect pre-charge contactor, carry out fault report, simultaneously stop connect high pressure; Whether last battery management system detects high-tension battery temperature too low, if high-tension battery temperature is too low, then battery control system control high-tension battery starts heating, if high-tension battery temperature is normal, then charges normal.
Under driving pattern, powering method provided by the invention also needs to carry out following a series of previous step, and entire car controller could send high pressure and power on instruction to battery management system.Described previous step comprises: 1) first battery management system control cathode contact device closes, and judge whether cathode contact device closes, carry out fault when cathode contact device is not closed to report, and stop connecting high pressure, and carry out next step when cathode contact device is closed; 2) then according to the oneself state information of each controller report, entire car controller judges whether each controller exists fault, carry out fault when each controller has at least one to there is fault report and report to the police, and all do not deposit at each controller and carry out next step in the case of a fault; 3) then judge commencing signal whether certain time (scope of this time is such as 0.1s-0.3s), when commencing signal continues the described time, carry out next step; 4) then judge whether the speed of a motor vehicle is less than a vehicle speed value (scope of this vehicle speed value is such as 15km/h-25km/h), carries out next step when the speed of a motor vehicle is less than this vehicle speed value; 5) finally judge whether electric motor vehicle gears is in neutral and whether brake pedal is stepped on, when electric motor vehicle gears is in neutral and brake pedal is stepped on, entire car controller sends high pressure and powers on instruction to battery management system.
Fig. 2 is the diagram of circuit of the lower method for electrically of pure electric vehicle provided by the invention.As shown in Figure 2, electric machine controller three phase short circuit process is carried out according to instruction electric under high pressure; Judge whether three phase short circuit process completes within the Second Threshold time, Insulation monitoring is carried out three phase short circuit process completes within the Second Threshold time, electric under performing high pressure described three phase short circuit process does not complete within the Second Threshold time, carry out fault simultaneously and report; Judge whether to there is insulation fault, electric perform high pressure when there is not insulation fault under, electric perform high pressure when there is insulation fault under, carry out fault simultaneously and report; Judge whether positive contact device and cathode contact device have at least one to disconnect, when positive contact device and cathode contact device have at least one to disconnect, perform active discharge, electric perform low pressure when positive contact device and cathode contact device all do not disconnect under, carry out fault simultaneously and report; Electric under performing low pressure; And complete lower electric process.
The described Second Threshold time can be arranged according to the needs of practical operation, and preferably, the scope of described Second Threshold time is 1s-2s, and more preferably, the described first threshold time is 1s.
According to technical scheme of the present invention, entire car controller under sending high pressure electric instruction to battery management system, electric instruction under battery management system judges whether to receive high pressure, under battery management system receives high pressure electric instruction or from instruction electric under entire car controller sends high pressure, timing reaches threshold time (such as 5s) when, carry out electric machine controller three phase short circuit process, and judge whether three phase short circuit process completes within the Second Threshold time, Insulation monitoring is carried out three phase short circuit process completes within the Second Threshold time, judge whether to there is insulation fault, and electricity under performing high pressure, wherein, carry out fault to report when there is insulation fault, electric directly skip Insulation monitoring step execution high pressure when three phase short circuit process does not complete described in the Second Threshold time under, carry out fault simultaneously and report.Then, judge whether positive contact device and cathode contact device have at least one to disconnect, when positive contact device and cathode contact device have at least one to disconnect, perform active discharge, and electricity under performing low pressure; Directly skip when positive contact device and cathode contact device all do not disconnect and perform active discharge process and perform electricity under low pressure, carry out fault simultaneously and report.
Send under high pressure before electric instruction at entire car controller, lower method for electrically provided by the invention also needs to carry out following a series of previous step.Following previous step comprises: 1) first entire car controller send unloading enable, inquire whether each controller can carry out lower electricity; 2) then whether each controller can electricity below to entire car controller feedback, when each controller feedback can below electricity or send from entire car controller unloading enable reach threshold time (such as 2s) perform next step; 3) then entire car controller judges whether the speed of a motor vehicle is less than a vehicle speed value (scope of this vehicle speed value is such as 15km/h-25km/h), next step is performed when the speed of a motor vehicle is less than this vehicle speed value or reach another threshold time (such as 1s-3s, the present invention does not limit the scope of this threshold time) from entire car controller judges vehicle speed value; 4) then detect high-tension battery electric current and whether drop to a current value (scope of this current value is such as 5A-15A) below, when high-tension battery electric current drops to below this current value, electric instruction under entire car controller transmission high pressure; When high-tension battery electric current does not drop to below this current value, postpone the time (scope of this time is such as 1s-2s) and judge whether high-tension battery electric current drops to below this current value for the second time, if high-tension battery electric current drops to below this current value in second time judges, then electric instruction under entire car controller transmission high pressure, if second time judges that high-tension battery electric current does not drop to below this current value yet, then reporting fault, but in order to proceeding of electric process under pure electric vehicle, entire car controller also will send electric instruction under high pressure.
Each determining step electric under described above is pure electric vehicle, but no matter how determining step carries out, preferably, time closing pure electric vehicle switch from chaufeur, time length reaches a threshold time (this threshold time is such as 11s-13s, the present invention does not limit it) when, entire car controller is electric under all storing data, to ensure that pure electric vehicle can complete by following electricity.
Pure electric vehicle provided by the invention power on and lower method for electrically powers on to pure electric vehicle and the fault that may occur in lower electric process detects, carry out fault in case of a failure to report, the failure message that entire car controller can report according to each thus controls whole power up, power on to make pure electric vehicle and lower electric process safer.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible array mode.
In addition, also can carry out combination in any between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. a powering method for pure electric vehicle, is characterized in that, this powering method comprises:
Under driving pattern:
Powering on according to high pressure, to control pre-charge contactor closed to carry out precharge in instruction;
Judge whether described precharge completes within the first threshold time, when completing precharge within the first threshold time, control positive contact device and close;
Judge whether described positive contact device is closed, when described positive contact device is closed, disconnect described pre-charge contactor; And
Complete power up.
2. powering method according to claim 1, is characterized in that, the scope of described first threshold time is 1s-3s.
3. powering method according to claim 1, is characterized in that, when not completing described precharge within the described first threshold time, stops described precharge, carries out fault simultaneously and reports.
4. powering method according to claim 1, is characterized in that, when described positive contact device is not closed, disconnects described pre-charge contactor, carries out fault simultaneously and report.
5. powering method according to claim 1, is characterized in that, this powering method also comprises:
Whether have charging wire access, enter described driving pattern when described high-tension battery accesses without charging wire if detecting high-tension battery; And enter charge mode when described high-tension battery has charging wire to access.
6. a lower method for electrically for pure electric vehicle, is characterized in that, this lower method for electrically comprises:
Electric machine controller three phase short circuit process is carried out according to instruction electric under high pressure;
Judge that whether described three phase short circuit process completes within the Second Threshold time, when completing described three phase short circuit process within the described Second Threshold time, carries out Insulation monitoring;
Judge whether to there is insulation fault, when there is not described insulation fault, electric under performing high pressure;
Judge whether positive contact device and cathode contact device have at least one to disconnect, when described positive contact device and described cathode contact device have at least one to disconnect, perform active discharge;
Electric under performing low pressure; And
Complete lower electric process.
7. lower method for electrically according to claim 6, is characterized in that, the scope of described Second Threshold time is 1s-2s.
8. lower method for electrically according to claim 6, is characterized in that, when not completing described three phase short circuit process within the described Second Threshold time, electric under performing high pressure, carries out fault simultaneously and reports.
9. lower method for electrically according to claim 6, is characterized in that, when there is insulation fault, electric under performing high pressure, carries out fault simultaneously and reports.
10. lower method for electrically according to claim 6, is characterized in that, when described positive contact device and described cathode contact device all do not disconnect, electric under performing low pressure, carries out fault simultaneously and reports.
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| CN201310684620.7A CN104709091B (en) | 2013-12-13 | 2013-12-13 | The upper electric and lower method for electrically of pure electric vehicle |
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| CN201310684620.7A CN104709091B (en) | 2013-12-13 | 2013-12-13 | The upper electric and lower method for electrically of pure electric vehicle |
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| CN104709091B CN104709091B (en) | 2017-04-05 |
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