CN106347130B - A kind of control method and control device of electric vehicle low-voltage power supply - Google Patents

A kind of control method and control device of electric vehicle low-voltage power supply Download PDF

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Publication number
CN106347130B
CN106347130B CN201610874435.8A CN201610874435A CN106347130B CN 106347130 B CN106347130 B CN 106347130B CN 201610874435 A CN201610874435 A CN 201610874435A CN 106347130 B CN106347130 B CN 106347130B
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Prior art keywords
control
automobile
accumulator
information
value
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CN106347130A (en
Inventor
杨国亮
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Beijing Electric Vehicle Co Ltd
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Beijing Electric Vehicle Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L1/00Supplying electric power to auxiliary equipment of vehicles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/40Drive Train control parameters
    • B60L2240/54Drive Train control parameters related to batteries
    • B60L2240/547Voltage
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/16Information or communication technologies improving the operation of electric vehicles
    • Y02T90/167Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
    • Y02T90/168
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S30/00Systems supporting specific end-user applications in the sector of transportation
    • Y04S30/10Systems supporting the interoperability of electric or hybrid vehicles
    • Y04S30/12Remote or cooperative charging

Abstract

The present invention provides a kind of control method and control device of electric vehicle low-voltage power supply, the control method of the electric vehicle low-voltage power supply includes:Obtain the real time status information of automobile;When real time status information instruction is currently first state, the battery tension for obtaining the automobile drops to the dip time of the first preset value;When the dip time meets preset condition, controls the electrokinetic cell system of the automobile and charge for the accumulator.The embodiment of the present invention increases electric component or sensor without additional, need to only increase some logic controls in the existing component of vehicle and maintenance to accumulator can be realized, avoid discharged or defective battery.Reliability of the embodiment of the present invention is high, and when abnormal conditions occurs in vehicle, can be by vehicle information notifying user, and intelligence degree is high, at low cost, applied widely.

Description

A kind of control method and control device of electric vehicle low-voltage power supply
Technical field
The present invention relates to electric vehicle design field, more particularly to a kind of control method of electric vehicle low-voltage power supply And control device.
Background technology
With advances in technology, increasingly deficient and Public environmental attitude the raising of petroleum resources, electric vehicle is increasingly It is valued by people, electric vehicle has obtained significant development in recent years.But current electric vehicle is usually since vehicle is quiet Vehicle battery caused by frequently using vehicle electric element equipment for a long time when the storage period is long or vehicle is not actuated is set to lose Electricity makes user that must not be changed without accumulator, strong influence customer experience.
Invention content
Technical problems to be solved of the embodiment of the present invention are to provide control method and the control of a kind of electric vehicle low-voltage power supply Device processed avoids discharged or defective battery to realize by handling accordingly.
In order to solve the above technical problems, an embodiment of the present invention provides a kind of control method of electric vehicle low-voltage power supply, The control method includes:
Obtain the real time status information of automobile;
When real time status information instruction is currently first state, the battery tension for obtaining the automobile drops to the The dip time of one preset value;
When the dip time meets preset condition, the electrokinetic cell system for controlling the automobile is that the accumulator fills Electricity.
Further, when real time status information instruction is currently the second state, the control method further includes:
Obtain the voltage value and key switch information of the accumulator of the automobile;
When the duration that key switch information has not been obtained being more than the second preset value, the long-range prison of the automobile is controlled Control system sends the first presupposed information to user;
When the second presupposed information for receiving user and being directed to first presupposed information feedback, and the voltage value is less than the When three preset values, controls the electrokinetic cell system of the automobile and charge for the accumulator.
Further, when real time status information instruction is currently the third state, the control method further includes:
Obtain the voltage value of the accumulator of the automobile;
When the voltage value is less than third preset value, the electrokinetic cell system for controlling the automobile is that the accumulator fills Electricity.
Further, when the dip time is unsatisfactory for preset condition, control the remote monitoring system of the automobile to User sends third presupposed information.
Further, the control method further includes:
When the 4th presupposed information for receiving user's transmission or the duration for not receiving field feedback are more than the The electrokinetic cell system for when four preset values, controlling the automobile locking car door, and controlling the automobile stops being the accumulator Charging.
Further, the control method further includes:
Obtain complete vehicle fault state, vehicle door status and forward engine room state;
When meeting the following conditions:The current faulty, vehicle door status of the complete vehicle fault state instruction indicates that current car door is opened It opens, when the current forward engine room of forward engine room state instruction at least one of is opened, the electrokinetic cell system for controlling the automobile stops It charges for the accumulator.
Further, the control method further includes:
Control remote monitoring system stores the fault message of the complete vehicle fault state instruction, and sends institute to default high in the clouds State fault message.
Further, the control method further includes:
Obtain battery tension;
When the voltage meets preset voltage value, controls the automobile and stop being that the accumulator charges.
Further, the preset condition includes the first preset condition and the second preset condition, first preset condition It is equal to the first preset value for the dip time, second preset condition is that the dip time the first preset range of satisfaction is wanted It asks;
When the dip time meets the second preset condition, the control method further includes:
It controls remote monitoring system and sends the 5th presupposed information to user.
The embodiment of the present invention additionally provides a kind of control device of electric vehicle low-voltage power supply, including:
First acquisition module, the real time status information for obtaining automobile;
Car body controller BCM modules are used for when real time status information instruction is currently first state, described in acquisition The battery tension of automobile drops to the dip time of the first preset value;
When the dip time meets preset condition, the car body controller BCM modules are for activating full-vehicle control system System VCU modules, the whole-control system VCU modules control the electrokinetic cell system of the automobile and charge for the accumulator.
Further, when the real time status information instruction that first acquisition module is got is currently the second state When, the control device further includes:
Car body controller BCM modules are additionally operable to obtain the voltage value of the accumulator of the automobile and key switch information;
Remote monitoring system RMS modules, for when have not been obtained key switch information time be more than the second preset value when, The first presupposed information is sent to user;
When the second presupposed information for receiving user and being directed to first presupposed information feedback, and the voltage value is less than the When three preset values, the whole-control system VCU modules control the electrokinetic cell system of the automobile and charge for the accumulator.
Further, when the real time status information instruction that first acquisition module is got is currently the third state When;
Car body controller BCM modules are additionally operable to obtain the voltage value of the accumulator of the automobile;
The whole-control system VCU modules control the electrokinetic cell system of the automobile when the voltage value is less than third When preset value, charge for the accumulator.
Compared with prior art, the control method of electric vehicle low-voltage power supply provided in an embodiment of the present invention and control dress It sets, at least has the advantages that:The embodiment of the present invention can be in the case where not increasing electric component or sensor, in vehicle Increase some logic controls in existing component and realize maintenance to accumulator, avoids discharged or defective battery.The embodiment of the present invention Reliability is high, and when abnormal conditions occurs in vehicle, can be by vehicle information notifying user, and intelligence degree is high, at low cost, It is applied widely.
Description of the drawings
Fig. 1 is one of the flow chart of control method of the electric vehicle low-voltage power supply of the embodiment of the present invention;
Fig. 2 is the two of the flow chart of the control method of the electric vehicle low-voltage power supply of the embodiment of the present invention;
Fig. 3 is the three of the flow chart of the control method of the electric vehicle low-voltage power supply of the embodiment of the present invention;
Fig. 4 is the four of the flow chart of the control method of the electric vehicle low-voltage power supply of the embodiment of the present invention;
Fig. 5 is the five of the flow chart of the control method of the electric vehicle low-voltage power supply of the embodiment of the present invention;
Fig. 6 is the structural schematic diagram of the control device of the electric vehicle low-voltage power supply of the embodiment of the present invention.
Specific implementation mode
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool Body embodiment is described in detail.In the following description, such as specific configuration is provided and the specific detail of component is only In order to help comprehensive understanding the embodiment of the present invention.It therefore, it will be apparent to those skilled in the art that can be to reality described herein Example is applied to make various changes and modifications without departing from scope and spirit of the present invention.In addition, for clarity and brevity, it is omitted pair The description of known function and construction.
It should be understood that " one embodiment " or " embodiment " that specification is mentioned in the whole text mean it is related with embodiment A particular feature, structure, or characteristic includes at least one embodiment of the present invention.Therefore, occur everywhere in the whole instruction " in one embodiment " or " in one embodiment " not necessarily refer to identical embodiment.In addition, these specific feature, knots Structure or characteristic can in any suitable manner combine in one or more embodiments.
Referring to Fig. 1, an embodiment of the present invention provides a kind of control method of electric vehicle low-voltage power supply, the control methods Including:
Step 101, the real time status information of automobile is obtained;
Step 102, when real time status information instruction is currently first state, the accumulator electricity of the automobile is obtained Dip time of the pressure drop to the first preset value;
Step 103, when the dip time meets preset condition, the electrokinetic cell system for controlling the automobile is described Accumulator charges.
It is real to the present invention below in conjunction with the control device of the electric vehicle low-voltage power supply of the embodiment of the present invention shown in fig. 6 The control method for applying example explains, it should be noted that when, the device being previously mentioned in following is the preferred embodiment of the present invention, The control method of the present invention is not limited to these devices.For the device being previously mentioned or module etc., different main engine plants have different Call or function are slightly different, or are integrated, no matter what title be, what difference is function have, as long as can be real The control method of the existing present invention, within protection scope of the present invention.The function of involved electric component in the present invention, can Suitable adjustment (such as whether by mobile phone reminding user, whether being sent to monitor supervision platform), function tune are carried out according to actual vehicle model After whole, also within the scope of the present invention.
In the control method of the embodiment of the present invention, first state is specially that vehicle normally stands parked state, vehicle body control Device BCM processed timing and detects battery tension in real time since key position is in OFF.When detecting battery tension in short-term In drastically decline the degree of (time, voltage value can be according to actually modifying), that is, drop to the dip time of the first preset value Length, carry out different processing.Herein, vehicle can be stood to accumulator electricity under parked state in an embodiment of the present invention The threshold value that pressure drop is arrived is written with the time used in BCM programs, as the first preset value.When detecting battery tension in short-term The interior degree drastically declined meets preset condition in certain zone of reasonableness, then BCM exports 12V high level and activates vehicle Vehicle is coordinated in control system VCU, VCU control, and control electrokinetic cell system starts electric pressure converter DC/DC to charge the battery. It should be noted that herein and the 12V high level that is mentioned below is the preferred embodiment of the present invention, but the present invention is not limited to This.Mentioned preset value can be also adjusted according to actual conditions.The present invention can effectively prevent vehicle quiet for a long time Set discharged or defective battery caused by parking.
Referring to Fig. 2, when the dip time is unsatisfactory for preset condition, step 104 is executed, the long-range of the automobile is controlled Monitoring system sends third presupposed information to user.
When detecting that degree that battery tension drastically declines in a short time exceeds zone of reasonableness, that is, it is unsatisfactory for default item Part, then BCM export 12V high level activation remote monitoring system RMS, RMS then pass the information on to user mobile phone carry out " vehicle is different Often check " it reminds, above-mentioned third presupposed information includes " vehicle abnormality inspection " or expression identical with its meaning, that is, is prompted User's accumulator is likely to occur exception, needs to check in time.
Referring to Fig. 3, the preset condition includes the first preset condition and the second preset condition, and first preset condition is The dip time is equal to the first preset value, and second preset condition is that the dip time the first preset range of satisfaction is wanted It asks;
When the dip time meets the second preset condition, the control method further includes:
Step 304, control remote monitoring system sends the 5th presupposed information to user.
When the degree and be not equal to the first preset value for detecting that battery tension declines in a short time, but in reasonable model It encloses, that is, when meeting the second preset condition, information of vehicles is sent to RMS and VCU by BCM by CAN bus, and RMS then passes information It is handed to user mobile phone and carries out " vehicle inspection " prompting, while information of vehicles is sent to monitor supervision platform.The default letter of above-mentioned the 5th Breath includes " vehicle inspection " or expression identical with its meaning, that is, prompts user's accumulator to be likely to occur exception, need to check.
Referring to Fig. 4, when real time status information instruction is currently the second state, the control method further includes:
Step 401, the voltage value and key switch information of the accumulator of the automobile are obtained;
Step 402, when the duration that key switch information has not been obtained being more than the second preset value, the automobile is controlled Remote monitoring system to user send the first presupposed information;
Step 403, when the second presupposed information for receiving user and being directed to first presupposed information feedback, and the voltage When value is less than third preset value, controls the electrokinetic cell system of the automobile and charge for the accumulator.
In the control method of the embodiment of the present invention, the second state is the state that car door becomes unlatching from closing, when BCM is examined Measure door contact interrupter unlatching, BCM starts timing, be not detected within the time of the second preset value key switch (ACC or ON) signal, then BCM exports 12V high level and activates RMS and VCU, and information of vehicles is sent to RMS and VCU by CAN bus, RMS is then passed the information on to user mobile phone and is carried out " vehicle user confirmation ", while information of vehicles is sent to monitor supervision platform.On The first presupposed information stated includes " vehicle user confirmation " or expression identical with its meaning, i.e., confirms car door by user Whether opening is user itself behavior.
If RMS receives field feedback and operated for me, the second presupposed information as confirms my information, such as Including keyword:It is, it is right, it is that I waits expression identical with its meaning, then it is pre- confirms whether battery tension value is less than third If value, is controlled if the BCM outputs 12V to VCU less than if, VCU and coordinate vehicle, control electrokinetic cell system starts DC/DC as electric power storage It charges in pond.It does not charge to accumulator if not less than if.
Further, with continued reference to Fig. 4, the control method further includes:
When the 4th presupposed information for receiving user's transmission or the duration for not receiving field feedback are more than the When four preset values, step 404 is executed, the automobile locking car door is controlled, and the electrokinetic cell system for controlling the automobile stops It charges for the accumulator.
If the 4th information that RMS receives user feedback, which is my non-operation, (does not receive user feedback in certain time Information operates in person with non-) when, then RMS is passed the information on to BCM and VCU, BCM and car door is locked immediately, and VCU does not allow then High pressure on vehicle.Timely closed door can be with the property safety of effective protection user.
Referring to Fig. 5, when real time status information instruction is currently the third state, the control method further includes:
Step 501, the voltage value of the accumulator of the automobile is obtained;
Step 502, when the voltage value is less than third preset value, the electrokinetic cell system for controlling the automobile is described Accumulator charges.
In the control method of the embodiment of the present invention, the third state is that key switch is ACC, i.e., do not start in automobile but The state of interior part electric power supply can be given.BCM starts timing and detects battery tension in real time.When detect accumulator electricity Pressure is less than third preset value, then BCM exports 12V high level to VCU and RMS, and VCU controls coordinate high pressure on vehicle, control power Battery system starts DC/DC to charge the battery.
Further, referring to Fig. 3 to Fig. 5, the control method further includes:
Step 105, complete vehicle fault state, vehicle door status and forward engine room state are obtained;
When meeting the following conditions:The current faulty, vehicle door status of the complete vehicle fault state instruction indicates that current car door is opened It opens, when the current forward engine room of forward engine room state instruction at least one of is opened, executes step 106, control the power of the automobile Battery system stops being that the accumulator charges.Further, step 106 further includes:Control the remote monitoring system storage The fault message of the complete vehicle fault state instruction, and send the fault message to default high in the clouds.
Further, the control method further includes:
Obtain battery tension;
Step 107, it when the voltage meets preset voltage value, controls the automobile and stops being that the accumulator charges.
In entire charging process, after BCM detects that forward engine room lid state becomes open state, BCM passes through CAN bus VCU is sent information to, high-voltage electricity under vehicle is coordinated in VCU controls.It is to be understood that needing to pass through high pressure to charge the battery DC/DC is converted to low pressure, and lower high pressure can then prevent the mode of charging behavior.In battery charging process, if vehicle occurs Other to need the failure of cutoff high power supply or detect that cabin cover is opened, then high-voltage electricity under vehicle is coordinated in VCU controls, and by failure It is transferred to RMS.When battery tension reaches pre-set value, high-voltage electricity under vehicle is coordinated in VCU controls.When battery tension reaches When pre-set value, high-voltage electricity under vehicle is coordinated in VCU controls.In entire battery charging process, when BCM detects key switch After action, then high-voltage electricity under vehicle is coordinated in VCU controls, and vehicle, which enters, normally powers on flow.
Discharged or defective battery caused by the control method of the embodiment of the present invention can prevent vehicle long-time standing from parking.It will Vehicle stands the threshold value that battery tension drops under parked state and is written in BCM programs with the time used, as standard.Pass through The practical accumulator of comparison reaches the time used in default constant voltage warning value, compared with design standard, to judge vehicle electric element shape State and accumulator status.And user can be sent information to by Internet technology, it is reminded.
Meanwhile the control method of the embodiment of the present invention can pre- anti-vehicle before electric pressure converter DC/DC work, key is opened Customs director's time is in ACC grades or car door, forward engine room lid are in open state, and vehicle electrical appliance frequently works long hours caused storage Battery power shortage.And can the pre- anti-vehicle security risk that stands the battery tension short time under parked state drastically descent tape is come, When vehicle standing can be parked the such failure of lower generation by this programme with Internet technology, notify user takes accordingly to arrange in time It applies.
Referring to Fig. 6, the embodiment of the present invention additionally provides a kind of control device of electric vehicle low-voltage power supply, including:
First acquisition module, the real time status information for obtaining automobile;
Car body controller BCM modules are used for when real time status information instruction is currently first state, described in acquisition The battery tension of automobile drops to the dip time of the first preset value;
When the dip time meets preset condition, the car body controller BCM modules are for activating full-vehicle control system System VCU modules, the whole-control system VCU modules control the electrokinetic cell system of the automobile and charge for the accumulator.
Further, when the real time status information instruction that first acquisition module is got is currently the second state When, the control device further includes:
Car body controller BCM modules are additionally operable to obtain the voltage value of the accumulator of the automobile and key switch information;
Remote monitoring system RMS modules, for when have not been obtained key switch information time be more than the second preset value when, The first presupposed information is sent to user;
When the second presupposed information for receiving user and being directed to first presupposed information feedback, and the voltage value is less than the When three preset values, the whole-control system VCU modules control the electrokinetic cell system of the automobile and charge for the accumulator.
Further, when the real time status information instruction that first acquisition module is got is currently the third state When;
Car body controller BCM modules are additionally operable to obtain the voltage value of the accumulator of the automobile;
The whole-control system VCU modules control the electrokinetic cell system of the automobile when the voltage value is less than third When preset value, charge for the accumulator.
Further, car body controller BCM modules are additionally operable to when the dip time is unsatisfactory for preset condition, control Remote monitoring system RMS modules send third presupposed information to user.
Further, when the remote monitoring system RMS modules receive the 4th presupposed information of user's transmission or do not connect When receiving the duration of field feedback more than four preset values, car body controller BCM modules control the automobile locking Car door, and whole-control system VCU modules are activated, the whole-control system VCU modules control the power battery of the automobile System stops being that the accumulator charges.
Further, car body controller BCM modules are additionally operable to obtain complete vehicle fault state, vehicle door status and forward engine room shape State;
When meeting the following conditions:The current faulty, vehicle door status of the complete vehicle fault state instruction indicates that current car door is opened It opens, when the current forward engine room of forward engine room state instruction at least one of is opened, the car body controller BCM module activations vehicle control System VCU modules processed, the electrokinetic cell system that the whole-control system VCU modules control the automobile stop being the electric power storage It charges in pond.
Further, car body controller BCM modules are additionally operable to control the remote monitoring system storage complete vehicle fault The fault message of state instruction, and send the fault message to default high in the clouds.
Further, car body controller BCM modules are additionally operable to obtain battery tension;
When the voltage meets preset voltage value, the car body controller BCM module activations whole-control system VCU moulds Block, the whole-control system VCU modules control the automobile and stop being that the accumulator charges.
Further, the preset condition includes the first preset condition and the second preset condition, first preset condition It is equal to the first preset value for the dip time, second preset condition is that the dip time the first preset range of satisfaction is wanted It asks;
When the dip time meets the second preset condition, the car body controller BCM modules are additionally operable to described in control Remote monitoring system RMS modules send the 5th presupposed information to user.
To sum up, the present invention increases electric component or sensor without additional, only need to increase by one in the existing component of vehicle The maintenance to accumulator can be realized in a little logic controls, avoids discharged or defective battery.The present invention is at low cost, and reliability is high, and , can be by vehicle information notifying user when abnormal conditions occurs in vehicle, intelligence degree is high, at low cost, applied widely.
Although the preferred embodiment of the embodiment of the present invention has been described, once a person skilled in the art knows bases This creative concept, then additional changes and modifications can be made to these embodiments.So the following claims are intended to be interpreted as Including preferred embodiment and fall into all change and modification of range of embodiment of the invention.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning Covering non-exclusive inclusion.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art For, without departing from the principles of the present invention, several improvements and modifications can also be made, these improvements and modifications It should be regarded as protection scope of the present invention.

Claims (10)

1. a kind of control method of electric vehicle low-voltage power supply, which is characterized in that the control method includes:
Obtain the real time status information of automobile;
When real time status information instruction is currently first state, the battery tension for obtaining the automobile drops to first in advance If the dip time of value;
When the dip time meets preset condition, controls the electrokinetic cell system of the automobile and charge for the accumulator;
When real time status information instruction is currently the second state, the control method further includes:
Obtain the voltage value and key switch information of the accumulator of the automobile;
When the duration that key switch information has not been obtained being more than the second preset value, the remote monitoring system of the automobile is controlled It unites and sends the first presupposed information to user;
It is directed to the second presupposed information that first presupposed information is fed back when receiving user, and the voltage value is pre- less than third If when value, controlling the electrokinetic cell system of the automobile and charging for the accumulator.
2. control method according to claim 1, which is characterized in that when real time status information instruction is currently third When state, the control method further includes:
Obtain the voltage value of the accumulator of the automobile;
When the voltage value is less than third preset value, controls the electrokinetic cell system of the automobile and charge for the accumulator.
3. control method according to claim 1, which is characterized in that
When the dip time is unsatisfactory for preset condition, the remote monitoring system for controlling the automobile is pre- to user's transmission third If information.
4. control method according to claim 1, which is characterized in that the control method further includes:
When the 4th presupposed information for receiving user's transmission or the duration for not receiving field feedback are more than the 4th in advance If the electrokinetic cell system for when value, controlling the automobile locking car door, and controlling the automobile stops being that the accumulator charges.
5. control method according to claim 1 or 2, which is characterized in that the control method further includes:
Obtain complete vehicle fault state, vehicle door status and forward engine room state;
When meeting the following conditions:The complete vehicle fault state instruction is currently faulty, vehicle door status indicates current car door opening, preceding When at least one of current forward engine room unlatching of cabin state instruction, the electrokinetic cell system stopping for controlling the automobile is described Accumulator charges.
6. control method according to claim 5, which is characterized in that the control method further includes:
Control remote monitoring system stores the fault message of the complete vehicle fault state instruction, and sends the event to default high in the clouds Hinder information.
7. control method according to claim 1 or 2, which is characterized in that the control method further includes:
Obtain battery tension;
When the voltage meets preset voltage value, controls the automobile and stop being that the accumulator charges.
8. control method according to claim 1, which is characterized in that the preset condition includes the first preset condition and the Two preset conditions, first preset condition are that the dip time is equal to the first preset value, and second preset condition is institute It states dip time and meets the requirement of the first preset range;
When the dip time meets the second preset condition, the control method further includes:
It controls remote monitoring system and sends the 5th presupposed information to user.
9. a kind of control device of electric vehicle low-voltage power supply, which is characterized in that including:
First acquisition module, the real time status information for obtaining automobile;
Car body controller BCM modules, for when real time status information instruction is currently first state, obtaining the automobile Battery tension drop to the dip time of the first preset value;
When the dip time meets preset condition, the car body controller BCM modules are for activating whole-control system VCU Module, the whole-control system VCU modules control the electrokinetic cell system of the automobile and charge for the accumulator;
When the real time status information instruction that first acquisition module is got is currently the second state, the control dress It sets and further includes:
Car body controller BCM modules are additionally operable to obtain the voltage value of the accumulator of the automobile and key switch information;
When have not been obtained key switch information time be more than the second preset value when, control remote monitoring system RMS modules to Family sends the first presupposed information;
It is directed to the second presupposed information that first presupposed information is fed back when receiving user, and the voltage value is pre- less than third If when value, the whole-control system VCU modules control the electrokinetic cell system of the automobile and charge for the accumulator.
10. control device according to claim 9, which is characterized in that described in being got when first acquisition module When real time status information instruction is currently the third state;
Car body controller BCM modules are additionally operable to obtain the voltage value of the accumulator of the automobile;
The whole-control system VCU modules control the electrokinetic cell system of the automobile when the voltage value is default less than third When value, charge for the accumulator.
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