CN110315978A - A kind of charging method of low tension battery, system and electric car - Google Patents
A kind of charging method of low tension battery, system and electric car Download PDFInfo
- Publication number
- CN110315978A CN110315978A CN201910632030.7A CN201910632030A CN110315978A CN 110315978 A CN110315978 A CN 110315978A CN 201910632030 A CN201910632030 A CN 201910632030A CN 110315978 A CN110315978 A CN 110315978A
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- power
- low tension
- management system
- entire car
- controller
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION 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
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION 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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION 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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/387—Determining ampere-hour charge capacity or SoC
-
- 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
-
- 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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
- Y02T90/167—Systems 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]
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS 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
- Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
- Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
- Y04S30/12—Remote or cooperative charging
Abstract
The present invention relates to a kind of charging method of low tension battery, system and electric cars, to realize the effect to charge by power battery to it in low tension battery power shortage.The charging method of the low tension battery, comprising: when vehicle is in static condition, low tension battery management system carries out timing, and when timing time reaches the first preset time, whether detection low tension battery is in power shortage state；If so, low tension battery management system is sent to no key controller mends electricity request, no key controller is set to issue long-range starting request, to wake up entire car controller in a dormant state；Entire car controller receives the running parameter for the power battery that the power battery management system waken up by its low pressure is sent, judges whether vehicle meets charge condition after being waken up；If satisfied, entire car controller, which issues control power battery to power battery management system, carries out the request that high pressure powers on, and DCDC work request is sent to DC-DC converter, to charge to low tension battery.
Description
Technical field
The present invention relates to electric storage battery field, charging method, system and the automobile of specifically a kind of low tension battery.
Background technique
Power supply of the low tension battery as the low-pressure system of electric car is the essential a part of automobile,
It is one of the key components and parts for influencing traffic safety.
With the progress of vehicle intellectualized technology, vehicle intelligence equipment is more and more complicated, leads to vehicle electrically controlling unit number
Amount sharply increases, so that vehicle dark current has the tendency that being gradually increased, the vehicle theory for carrying identical capacity low pressure battery is stopped
It is then shorter and shorter to put the time.If user forgets to take the pile crown of battery before shelving vehicle, when reusing vehicle, easily go out
Existing discharged or defective battery, vehicle will be unable to carry out can travel mode when serious, it is necessary to external electricity of taking is rescued, for user's trip and
Very big inconvenience is caused with vehicle, and irreversible influence will also result on the service life of battery after electric power storage tank depth power shortage, thus
Increase user uses Che Chengben.
Currently, existing vehicle is when vehicle is shelved, to prevent discharged or defective battery, it is still necessary to which user actively takes battery
First pile crown is easy to forget to lead to accumulator feeding, on the other hand also not convenient enough.
Summary of the invention
The object of the present invention is to provide a kind of charging method of low tension battery, system and electric cars, to realize
The effect to be charged by power battery to it in low tension battery power shortage.
The technical solution of the present invention is as follows:
The present invention provides a kind of charging methods of low tension battery, comprising:
Step S1, when vehicle is in static condition, low tension battery management system carries out timing, reaches first in timing time
When preset time T 1, whether detection low tension battery is in power shortage state；
Step S2 makes the no key if so, the low tension battery management system is sent to no key controller mends electricity request
Spoon controller issues long-range starting request, to wake up entire car controller in a dormant state；
Step S3, the entire car controller receive transmitted by the power battery management system waken up by its low pressure after being waken up
Power battery running parameter, and judge whether vehicle meets charge condition based on the running parameter；
Step S4, if satisfied, the entire car controller issued to the power battery management system control the power battery into
The request that horizontal high voltage powers on, and DCDC work request is sent to DC-DC converter, make the DC-DC converter by the power electric
The high-voltage electricity of pond output is converted to low tension to charge to the low tension battery.
Preferably, the method also includes:
Step S5, the entire car controller carry out timing to charging time of the low tension battery, reach the in timing time
When two setting time T2, the entire car controller will be sent to the DCDC work request set of the DC-DC converter, and in institute
It states to send after DC-DC converter stops working to the low tension battery management system and mends electricity termination request；
Step S6, the low tension battery management system are based on the benefit electricity and terminate request, judge the lotus of the low tension battery
Whether electricity meets stopping charge condition；
Step S7 if satisfied, then low tension battery management system is permitted to entire car controller transmission benefit electricity termination, and will be sent to
The benefit electricity of no key controller requests set, sets no key controller by the long-range starting for being sent to entire car controller request
Position；
Step S8, the entire car controller are based on the long-range starting and request set information, Xiang Suoshu power battery management system
It issues and controls request electric under the power battery high pressure, so that the power battery management system is controlled the power battery and carry out
It is electric under high pressure；
Step S9 is completed under high pressure after electricity, power battery management system described in the vehicle control unit controls in the power battery
System carries out electricity under low pressure, to enter dormant state；
Step S10 is completed under low pressure after electricity in the power battery management system, and the lower electricity of the entire car controller itself, which enters, stops
Dormancy state.
Preferably, the low tension battery management system judges that the carrying capacity of the low tension battery is unsatisfactory for stopping charging
When condition, the method also includes:
Step S3 is repeated to step S6.
Preferably, in step S1:
Vehicle is in static condition are as follows: vehicle is in lower electricity and car door is in the state to latch, low tension battery management system
System determines whether vehicle is in power-down state according to the vehicle power state signal that the no key controller is sent, and according to vehicle
The vehicle door status signal that body controller is sent determines whether car door is in the state of latching；
Low tension battery is in power shortage state and refers to: the carrying capacity of low tension battery is lower than the state of the first preset threshold S0C1.
Preferably, in step S3, the running parameter of power battery includes: that the current carrying capacity of power battery and battery are available
Discharge power, step S3 include:
Step S31, entire car controller issues low pressure power on signal to power battery management system, to wake up the power battery pipe
Reason system；
Step S32, the power battery management system is after completing low pressure and powering on, by power battery current carrying capacity and battery
The entire car controller can be sent to discharge power；
Step S33, if the entire car controller determines that the current carrying capacity of power battery is higher than the second given threshold SOC2 and electricity
Chi Keyong discharge power is higher than the first setting power P 1, it is determined that vehicle meets charge condition；
Step S34, if the entire car controller determines the current carrying capacity of power battery lower than the 4th given threshold S0C4 or electricity
Chi Keyong discharge power is lower than the second setting power P 2, it is determined that vehicle is unsatisfactory for charge condition；
Wherein, the second given threshold S0C2 is greater than the 4th given threshold S0C4, and the first setting power P 1 is greater than the second setting power
P2。
Preferably, step S4 includes:
Step S41, the entire car controller issue high pressure power-up request to the power battery management system, make the power electric
Management system control power battery in pond carries out high pressure and powers on；
Step S42 judges whether that the signal that high pressure powers on is completed in the power battery for receiving power battery management system feedback；
Step S43, if receiving, the work for the power battery that the entire car controller is sent according to power battery management system
Parameter, repetition judge whether vehicle meets charge condition；
Step S44, if satisfied, then the entire car controller to DC-DC converter send DCDC work request；
Step S45 judges whether its signal for normally entering working condition for receiving DC-DC converter feedback；
Step S46, if receiving, the high-voltage electricity that the vehicle control unit controls DC-DC converter exports power battery is carried out
DCDC conversion thinks that low tension battery charges.
Preferably, if judging that vehicle is unsatisfactory for charge condition in step S3, if judging entire car controller in step S42
The signal that high pressure powers on is completed in the power battery for not receiving power battery management system feedback, if whole described in step S43
Vehicle controller repeats to sentence disconnected vehicle out and is unsatisfactory for charge condition, or, if judging that entire car controller does not receive in step S45
Its signal for normally entering working condition of DC-DC converter feedback, the method also includes:
Step S11, entire car controller send to low tension battery management system and mend Electricity Functional inhibition request；
Step S12, the low tension battery management system are based on the benefit Electricity Functional inhibition request, will be sent to no key controller
The benefit electricity request signal set of device, make no key controller will be sent to entire car controller long-range starting request set, with into
Enter step S8 to step S10.
Preferably, the benefit Electricity Functional inhibition request sent in the low tension battery management system based on entire car controller,
After being sent to the benefit electricity request signal set of no key controller, the method also includes:
Step S13, the low tension battery management system control itself into dormant state.
According to another aspect of the present invention, the present invention also provides a kind of charging systems of low tension battery, comprising: power
Battery, low tension battery, no key controller, car body controller；Entire car controller；
Connect the low pressure of the low tension battery, the no key controller, the car body controller and the entire car controller
Battery management system；
Connect the power battery management system of the power battery and the entire car controller；
Connect the DC-DC converter of the power battery, the low tension battery and the entire car controller；
Wherein, the low tension battery management system in the vehicle power state signal sent according to the no key controller and
The vehicle door status signal that the car body controller is sent determines that vehicle is in static condition and determines that low tension battery is in power shortage
It when state, is sent to no key controller and mends electricity request, so that the no key controller is issued long-range starting request, to wake up place
In the entire car controller of dormant state；
The entire car controller receives power electric transmitted by the power battery management system waken up by its low pressure after being waken up
The running parameter in pond, and judge whether vehicle meets charge condition based on the running parameter；
When determining that vehicle meets charge condition, the entire car controller issues described in control to the power battery management system
Power battery carries out the request that high pressure powers on, and sends DCDC work request to the DC-DC converter, converts the DCDC
The high-voltage electricity that the power battery exports is converted to low tension to charge to the low tension battery by device.
Preferably, the present invention also provides a kind of electric car, the charging system including above-mentioned low tension battery.
The invention has the benefit that
The present invention can be automatically regularly to the carrying capacity row monitor check of low tension battery, and utilizes the electricity of power battery storage
It can carry out mending electricity for low tension battery in due course, can effectively extend the theoretical down time of low tension battery.This method is simple, and
It is reliable feasible, user can be effectively reduced and shelve caused low tension battery feed problem after vehicle for a long time, promote user's body
It tests, effectively extends low tension battery service life, while reducing the capacity type selecting of low tension battery, reduce production cost and use
Cost.
Detailed description of the invention
Fig. 1 is one of method flow schematic diagram of the invention；
Fig. 2 is the flow chart of step S3；
Fig. 3 is the flow chart of step S4；
Fig. 4 is the two of method flow schematic diagram of the invention；
Fig. 5 is method detailed maps of the invention；
Fig. 6 is the structural block diagram of system of the invention.
Specific embodiment
The exemplary embodiment that the present invention will be described in more detail below with reference to accompanying drawings.Although showing the present invention in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the present invention without should be by embodiments set forth here
It is limited.It is to be able to thoroughly understand the present invention on the contrary, providing these embodiments, and can be by the scope of the present invention
It is fully disclosed to those skilled in the art.
Referring to figs. 1 to Fig. 6, the present invention provides a kind of charging methods of low tension battery 8, comprising:
Step S1, when vehicle is in static condition, low tension battery management system 2 carries out timing, reaches the in timing time
When one preset time T 1, whether detection low tension battery 8 is in power shortage state.
Wherein, vehicle includes: power battery 7, low tension battery 8, no key controller 1, car body controller 3；Vehicle control
Device 4 processed；Connect the low tension battery 8, the no key controller 1, the car body controller 3 and the entire car controller 4
Low tension battery management system 2；Connect the power battery management system 6 of the power battery 7 and the entire car controller 4；
The DC-DC converter 6 of the power battery 7, the low tension battery 8 and the entire car controller 4 is connected, between each controller
Information exchange is carried out by CAN network.Entire car controller 4, which is mainly responsible for, carries out coordinated control to the other management systems of vehicle,
It is electric above and below including vehicle, energy management and power distribution etc..In the present embodiment, it is mainly responsible for power battery management system
The low pressure of system 6 is electric above and below, the upper and lower electric control of high pressure, and DC-DC converter 6 controls, and is fed back according to power battery management system 6
Relevant information decision whether have charging condition and control single charge duration.Car body controller 3 is mainly used
It is controlled in the management of the car body components such as vehicle doorn, window and light, vehicle door status can be monitored in real time, and be sent to low pressure storage
Battery management system 2.Power battery management system 6 is mainly responsible for the state-of-charge to power battery 7, voltage, electric current, temperature etc.
Information is monitored, and health status to power battery 7 and charge and discharge ability are assessed, and respond entire car controller 4
It is upper and lower electricity instruction.DC-DC converter 6, the class generator in responsibility and orthodox car in electric car are seemingly mainly responsible for
The high voltage direct current of power battery 7 is converted into low-voltage DC, is that vehicle low-voltage load and low tension battery 8 are powered.At this
It is main to include work request of the response from entire car controller 4 and feed back corresponding working condition in embodiment.Low tension battery
Management system 2 can be by sensor to the voltage of low tension battery 8, electric current, storage battery charge state and battery temp
Etc. information be monitored, the health status of low tension battery 8 can be assessed.In the present embodiment, according to current vehicle
Lower electricity latch state, the carrying capacity state of low tension battery 8, sent to no key controller 1 and mend electricity request, respond vehicle control
The benefit electricity of device 4 processed terminates request, and feeds back corresponding benefit electricity according to the carrying capacity state of low tension battery 8 and terminate enabling signal.
No key controller 1 is mainly used for receiving the key start request of driver or the remote starter of remote control terminal is asked
It asks, completes the power supply status distribution (ACC/ON/START) of vehicle.In the present embodiment, low tension battery management system is being received
After the benefit electricity request that system 2 is sent, remote starter request is sent to entire car controller 4, wakes up entire car controller 4, and fed power supplies
Assign status signal is to low tension battery management system 2.
Vehicle is in static condition are as follows: vehicle is in lower electricity and car door is in the state to latch, the low tension battery pipe
Reason system 2 determines whether vehicle is in power-down state according to the vehicle power state signal that no key controller 1 is sent, and according to
The vehicle door status signal that car body controller 3 is sent determines whether car door is in the state of latching.Wherein, no key controller 1 is main
For receiving the key start request of driver or the remote starter request of remote control terminal, and the power supply status point of completion vehicle
With (ACC/ON/START), car body controller 3 is mainly used for the management control of the car body components such as vehicle doorn, window and light, can
To monitor vehicle door status in real time.No key controller 1 connects the low pressure electric power storage by CAN bus respectively with car body controller 3
Pond management system 2, low tension battery management system 2 can be by sensors to the voltage, electric current, battery of low tension battery 8
The information such as state-of-charge and battery temp are monitored, and can be assessed the health status of low tension battery 8.Low pressure
Battery management system 2 determines whether vehicle is in quiet according to the signal that no key controller 1 and car body controller 3 are transmitted
Set state.
After vehicle is in static condition, the entire car controller 4 of vehicle is in a dormant state.Entire car controller 4 is in vehicle
It after static condition, itself does not need to work, if needing to expend more electricity to make it keep working condition
Amount.In the application, the entire car controller 4 woth no need to work enters dormant state, it is possible to reduce electricity waste extends low pressure
Battery 8 uses duration.Low tension battery 8 is in power shortage state and refers to: the carrying capacity of low tension battery 8 is lower than the first default threshold
The state of value S0C1.Wherein, the first preset threshold S0C1 can be demarcated according to the actual situation, be also possible to pre- when vehicle release
The low carrying capacity voltage threshold first set.
Wherein, after timing time reaches the first preset time T 1, if the carrying capacity of the low tension battery be higher than this first
Preset threshold SOC1, it is determined that low tension battery 8 does not need to carry out mending electricity, and therefore, the low tension battery 8 is clear by institute's timing time
Zero, and reclocking is carried out, when timing time reaches the first preset time T 1, whether repeat detection low tension battery 8
The step of in power shortage state.
Step S2 makes institute if so, the low tension battery management system 2 is sent to no key controller 1 mends electricity request
It states no key controller 1 and issues long-range starting request, to wake up entire car controller 4 in a dormant state.
It mends electricity request and no key controller 1 is sent to by CAN signal, no key controller 1 is sent to entire car controller 4
Long-range starting request as the wake-up signal to entire car controller 4 in a dormant state.
Step S3, the entire car controller 4 receive the power battery management system 6 waken up by its low pressure after being waken up
The running parameter of transmitted power battery 7, and judge whether vehicle meets charge condition based on the running parameter.
Wherein, as shown in Fig. 2, the running parameter of power battery 7 include: the current carrying capacity of power battery 7 and battery can
With discharge power, step S3 includes:
Step S31, entire car controller 4 issues low pressure power on signal to power battery management system 6, to wake up the power battery
Management system 6.
Step S32, the power battery management system 6 is after completing low pressure and powering on, by the current carrying capacity of power battery 7
The entire car controller 4 can be sent to discharge power with battery.
Step S33, if the entire car controller 4 determines power battery 7, current carrying capacity is higher than the second given threshold
SOC2 and battery can be higher than first with discharge power and set power P 1, it is determined that vehicle meets charge condition.Step S34, if institute
It states entire car controller 4 and determines that the current carrying capacity of power battery 7 is lower than the 4th given threshold S0C4 or battery and can use discharge power
Lower than the second setting power P 2, it is determined that vehicle is unsatisfactory for charge condition.
Wherein, the second given threshold S0C2 is greater than the 4th given threshold S0C4, and the first setting power P 1 is greater than the second setting
Power P 2.
Wherein, the carrying capacity for power battery 7 and battery can be to guarantee power battery 7 with the judgement of discharge power
With enough electricity to keep vehicle normally can start and exercise when exercising next time, 7 power shortage of power battery is prevented.
Step S4, if satisfied, the entire car controller 4 is issued to the power battery management system 6 controls the power
Battery 7 carries out the request that high pressure powers on, and sends DCDC work request to DC-DC converter 6, makes the DC-DC converter 6 by institute
The high-voltage electricity for stating the output of power battery 7 is converted to low tension to charge to the low tension battery 8.
As shown in figure 3, step S4 includes:
Step S41, the entire car controller 4 issue high pressure power-up request to the power battery management system 6, make the power
Battery management system 6 controls the progress of power battery 7 high pressure and powers on；
Step S42 judges whether that the letter that high pressure powers on is completed in the power battery 7 for receiving the feedback of power battery management system 6
Number；
Step S43, if receiving, power battery 7 that the entire car controller 4 is sent according to power battery management system 6
Running parameter, repetition judge whether vehicle meets charge condition；
Step S44, if satisfied, then the entire car controller 4 to DC-DC converter 6 send DCDC work request；
Step S45 judges whether its signal for normally entering working condition for receiving the feedback of DC-DC converter 6；
Step S46, if receiving, the entire car controller 4 controls the high-voltage electricity that DC-DC converter 6 exports power battery 7
It carries out DCDC conversion and thinks that low tension battery 8 charges.
Preferably, as shown in figure 4, the method also includes:
Step S5, the entire car controller 4 carry out timing to the charging time of the low tension battery 8, reach in timing time
When the second setting time T2, the entire car controller 4 will be sent to the DCDC work request set of the DC-DC converter 6, and
It is sent after the DC-DC converter 6 stops working to the low tension battery management system 2 and mends electricity termination request；
Step S6, the low tension battery management system 2 are based on the benefit electricity and terminate request, judge the low tension battery 8
Whether carrying capacity meets stopping charge condition；
Step S7, if satisfied, then low tension battery management system 2 to entire car controller 4 send mend electricity terminate license, and will send
Set is requested to the benefit electricity of no key controller 1, asks that no key controller 1 by the long-range starting for being sent to entire car controller 4
Ask set；
Step S8, the entire car controller 4 are based on the long-range starting and request set information, Xiang Suoshu power battery management system
6 issue request electric under control 7 high pressure of power battery, and the power battery management system 6 is made to control the power battery 7
Carry out electricity under high pressure；
Step S9 is completed under high pressure after electricity in the power battery 7, and the entire car controller 4 controls the power battery management
System 6 carries out electricity under low pressure, to enter dormant state；
Step S10 is completed under low pressure after electricity in the power battery management system 6, and the lower electricity of the entire car controller 4 itself enters
Dormant state.
Preferably, the low tension battery management system 2 judges that the carrying capacity of the low tension battery 8 is unsatisfactory for stopping filling
When electric condition, the method also includes:
Step S3 is repeated to step S6.
Preferably, in conjunction with shown in Fig. 3 and Fig. 4, if judging that vehicle is unsatisfactory for charge condition in step S3, if step S42
In judge entire car controller 4 do not receive power battery management system 6 feedback power battery 7 letter that high pressure powers on is completed
Number, if entire car controller 4 described in step S43 repeats to sentence disconnected vehicle out and is unsatisfactory for charge condition, or, if judging in step S45
Entire car controller 4 does not receive its signal for normally entering working condition of the feedback of DC-DC converter 6 out, and the method is also wrapped
It includes:
Step S11, entire car controller 4 send to low tension battery management system 2 and mend Electricity Functional inhibition request；
Step S12, the low tension battery management system 2 are based on the benefit Electricity Functional inhibition request, will be sent to no key controlled
The benefit electricity request signal set of device 1 processed makes no key controller 1 that set is requested in the long-range starting for being sent to entire car controller 4,
To enter step S8 to step S10.
Preferably, as shown in figure 4, the benefit electric work sent in the low tension battery management system 2 based on entire car controller 4
Energy inhibition request, after being sent to the benefit electricity request signal set of no key controller 1, the method also includes:
Step S13, the low tension battery management system 2 control itself and enter dormant state.
In the embodiment of the present application, a kind of detailed step of the charging method of low tension battery 8 is provided, as shown in figure 5, should
Method specifically includes:
In step B01, vehicle power supply status is sent to low tension battery management system 2 by no key controller 1.
In step B02, vehicle door status signal is sent to low tension battery management system 2 by car body controller 3.
Step B01, step B02 can be directly entered step B03, and in step B03, low tension battery management system 2 is logical
It crosses and receives vehicle power supply status feed back from no key controller 1 and the vehicle door status signal from the feedback of car body controller 3,
Determine current vehicle whether be in it is lower electricity, latch state.If it is determined that "Yes" then enters step B04, if it is determined that "No"
Original state is then returned, timing monitoring condition satisfaction is continued waiting for.
In step B04, low tension battery management system 2 then starts to carry out timing monitoring, and step B04 can be directly entered step
Rapid B05.
In step B05, low tension battery 8, which manages, further judges whether timing reaches the first preset time T 1, if sentenced
Breaking, then return step B05 continues timing for "No", if it is determined that "Yes" then enters step B06.
In step B06, low tension battery management system 2 needs the carrying capacity to low tension battery 8 to check, further
Judge whether the carrying capacity of battery is lower than the first preset threshold SOC1.If it is determined that "No" then enters step B07.
It executes timing monitoring in step B07 to reset, then return step B04, restarts timing.If it is determined that "Yes"
Then enter step B08.
In step B08, low tension battery management system 2 is sent to no key controller 1 mends electricity request, and step B08 can be straight
It connects and enters step B09.
In step B09, after no key controller 1 receives benefit electricity request, long-range control is sent to entire car controller 4 and is asked
It asks, wakes up entire car controller 4, step B09 can be directly entered step B10.
In step B10, entire car controller 4 sends 6 wake-up signal of power battery management system and wakes up power battery management system
System 6 is completed 6 low pressure of power battery management system and is powered on, and step B10 can be directly entered step B11.
In step B11, entire car controller 4 carries out mending the assessment that Electricity Functional forbids condition, 6 low pressure of power battery management system
After powering on, the current state-of-charge of power battery 7 and battery can be sent to entire car controller 4, vehicle control with discharge power
Device 4 processed determines whether current power system can charge for battery accordingly.If the current state-of-charge of power battery 7
Higher than the second preset threshold SOC2 and battery can then meet to charge the battery with discharge power also above the first setting power P 1
Condition, be judged as that "No" then enters step B12.If the current state-of-charge of power battery 7 is lower than the 4th preset threshold
SOC4 or battery can then be unsatisfactory for condition to charge the battery, be judged as with discharge power lower than the second setting power P 2
"Yes" then enters step B23.
In step B12, then further request battery management system progress high pressure powers on entire car controller 4, and step B12 can be straight
It connects and enters step B13.
In step B13, entire car controller 4 powers on successful instance to the high pressure of power battery 7 and confirms.Power battery pipe
After reason system 6 receives the high pressure power-up request of entire car controller 4, control power battery 7 is completed high pressure and is powered on, and it is high
Pressure power-up state feeds back to entire car controller 4, and whether entire car controller 4 confirms that 7 high pressure of power battery powers on accordingly and succeed.If dynamic
7 high pressure of power battery powers on success, is judged as that "Yes" then enters step B14.If it is determined that "No" then enters step B23.
In step B14, entire car controller 4 still needs to whether real-time judgment current power system can be filled for battery
Electricity.It can be with discharge power also above the if the current state-of-charge of power battery 7 is higher than the second preset threshold SOC2 and battery
One setting power P 1, then meet condition to charge the battery, be judged as that "No" enters step B15.If power battery 7 is current
State-of-charge lower than the 4th preset threshold SOC4 or battery can with discharge power lower than the second setting power P 2, then be unsatisfactory for for
The condition of battery charging, is judged as that "Yes" then enters step B23.
In step B15, entire car controller 4 sends DCDC work request to direct current switching controller, starts as low pressure electric power storage
Pond 8 carries out mending electricity, and step B15 can be directly entered step B16.
In step B16, the needs of entire car controller 4 further confirm the working condition of direct current switching controller, directly
Circulation changer controller after the DCDC work request for receiving the transmission of entire car controller 4, start to work by control direct current transducer, is
Low tension battery 8 charges, and the working condition of direct current transducer is fed back to entire car controller 4.If direct current transducer
The work request for responding entire car controller 4, is judged as that "No" then enters step B23, is judged as that "Yes" then enters step B17.
In step B17, entire car controller 4 starts to carry out duration of charge timing, and monitoring direct current transducer is low pressure
Battery 8 mends the duration of electricity, and step B17 can be directly entered step B18.
In step B18, entire car controller 4 needs to judge that low tension battery 8 mends whether the electric duration reaches setting
Time threshold.If duration of charge reaches the second preset time T 2, B19 is entered step if being judged as "Yes".Otherwise, sentence
Break as "No" then return step B17, continues as low tension battery 8 and carry out mending electricity.
In step B19, entire car controller 4 is sent to the DCDC work request set of direct current switching controller, and step B19 can
It is directly entered step B20.
In step B20, entire car controller 4 needs to further confirm that direct current transducer working condition, judges direct current transducer
Whether the shutdown request of entire car controller 4 is responded.If it is determined that then return step B19 continues waiting for direct current transducer and stops "No"
It only works, if it is determined that "Yes" then enters step B21.
In step B21, entire car controller 4 is sent to low tension battery management system 2 mends electricity termination request, and step B21 can
It is directly entered step B22.
In step B22, the needs of low tension battery management system 2 assess the carrying capacity of current low tension battery 8, really
Whether the carrying capacity for recognizing current low tension battery 8 is higher than third preset threshold SOC3.The return step B14 if being judged as "No",
Do not allow to terminate this then and mend electricity, entire car controller 4 needs again whether to fill current power system for battery
Electricity is determined.Direct current transducer work is re-requested, and restarts to carry out timing to duration of charge, is again gone into
Charging process.It is sent if being judged as "Yes" to entire car controller 4 and mends electricity termination enabling signal, enter step B24.
In step B23, entire car controller 4 is sent to low tension battery management system 2 mends Electricity Functional decretum inhibitorium, and request is eventually
It only executes and mends Electricity Functional, step B23 can be directly entered step B24.
In step B24, low tension battery management system 2 sets the benefit electricity request signal for being sent to no key controller 1
Position, step B24 can enter step B25 and step B28 simultaneously.
In step B25, low tension battery management system 2 will further determine whether need to restart timing monitoring.If
Low tension battery management system 2 has received the benefit Electricity Functional decretum inhibitorium of the transmission of entire car controller 4, shows current vehicle high pressure
System has had no ability to carry out mending electricity again for low tension battery 8, is judged as that "No" enters step B27, otherwise, is judged as "Yes"
Enter step B26.
In step B26, low tension battery management system 2 resets current monitoring timing, and step B26 returns to initial rank
Section waits the opportunity charged next time to arrive.
In step B27, low tension battery management system 2 will stop timing monitoring, to reduce vehicle dark current, extend vehicle
The theoretical storage period is needed at this time by the complete suspend mode of low tension battery management system 2 (including timing monitoring chip).
In step B28, after no key controller 1 receives benefit electricity request set, the remote of entire car controller 4 is sent it to
Journey start request home position signal, request entire car controller 4 carry out lower electric control, and step B28 can be directly entered step B29.
In step B29, after entire car controller 4 receives the set information of remote starter request signal, according to power electric
The battery management system operating mode signal that pond management system 6 is fed back further judges that power battery 7 is current whether in high pressure
Power-up state.B30 is entered step if being judged as "Yes", is judged as that "No" enters step B32.
In step B30, entire car controller 4 to power battery management system 6 send high pressure under electricity request, B30 can directly into
Enter step B31.
In step B31, battery management system operating mode that entire car controller 4 is fed back according to power battery management system 6
It is electric under high pressure to further confirm that whether power battery 7 is completed for signal.If it is determined that "Yes" then enters step B32, if it is determined that
For "No" then return step B30, continues waiting for power battery 7 and complete electricity under high pressure.
In step B32, entire car controller 4 controls power battery management system 6 and completes electricity, suspend mode under low pressure, and B32 can be direct
Enter step B33.In step B33, electricity, suspend mode under the low pressure of the completion of entire car controller 4 itself.
The above method of the present invention, can be automatically regularly to the carrying capacity row monitor check of low tension battery 8, and utilizes dynamic
The electric energy that power battery 7 stores is that low tension battery 8 carries out mending electricity in due course, can effectively extend the theoretical parking of low tension battery 8
Time.This method is simple, and reliable feasible, and user can be effectively reduced and shelve caused low tension battery 8 after vehicle for a long time
Feed problem promotes user experience, effectively extends 8 service life of low tension battery, while reducing the capacity choosing of low tension battery 8
Type reduces production cost and use cost.
As shown in fig. 6, according to another aspect of the present invention, the present invention also provides a kind of Chargings of low tension battery 8
System, comprising: power battery 7, low tension battery 8, no key controller 1, car body controller 3；Entire car controller 4；
Connect the low tension battery 8, the no key controller 1, the car body controller 3 and the entire car controller 4
Low tension battery management system 2；
Connect the power battery management system 6 of the power battery 7 and the entire car controller 4；
Connect the DC-DC converter 6 of the power battery 7, the low tension battery 8 and the entire car controller 4；
Wherein, the low tension battery management system 2 is in the vehicle power state signal sent according to the no key controller 1
The vehicle door status signal sent with the car body controller 3 determines that vehicle is in static condition and determines that low tension battery 8 is in
It when power shortage state, is sent to no key controller 1 and mends electricity request, the no key controller 1 is made to issue long-range starting request, with
Wake up entire car controller 4 in a dormant state；
The entire car controller 4 receives power transmitted by the power battery management system 6 waken up by its low pressure after being waken up
The running parameter of battery 7, and judge whether vehicle meets charge condition based on the running parameter；
When determining that vehicle meets charge condition, the entire car controller 4 issues control institute to the power battery management system 6
It states power battery 7 and carries out the request that high pressure powers on, and send DCDC work request to the DC-DC converter 6, make the DCDC
The high-voltage electricity that the power battery 7 exports is converted to low tension to charge to the low tension battery 8 by converter 6.
Preferably, the present invention also provides a kind of electric car, the charging system including above-mentioned low tension battery 8.
Claims (10)
1. a kind of charging method of low tension battery characterized by comprising
Step S1, when vehicle is in static condition, low tension battery management system carries out timing, reaches first in timing time
When preset time T 1, whether detection low tension battery is in power shortage state；
Step S2 makes the no key if so, the low tension battery management system is sent to no key controller mends electricity request
Spoon controller issues long-range starting request, to wake up entire car controller in a dormant state；
Step S3, the entire car controller receive transmitted by the power battery management system waken up by its low pressure after being waken up
Power battery running parameter, and judge whether vehicle meets charge condition based on the running parameter；
Step S4, if satisfied, the entire car controller issued to the power battery management system control the power battery into
The request that horizontal high voltage powers on, and DCDC work request is sent to DC-DC converter, make the DC-DC converter by the power electric
The high-voltage electricity of pond output is converted to low tension to charge to the low tension battery.
2. charging method according to claim 1, which is characterized in that the method also includes:
Step S5, the entire car controller carry out timing to charging time of the low tension battery, reach the in timing time
When two setting time T2, the entire car controller will be sent to the DCDC work request set of the DC-DC converter, and in institute
It states to send after DC-DC converter stops working to the low tension battery management system and mends electricity termination request；
Step S6, the low tension battery management system are based on the benefit electricity and terminate request, judge the lotus of the low tension battery
Whether electricity meets stopping charge condition；
Step S7 if satisfied, then low tension battery management system is permitted to entire car controller transmission benefit electricity termination, and will be sent to
The benefit electricity of no key controller requests set, sets no key controller by the long-range starting for being sent to entire car controller request
Position；
Step S8, the entire car controller are based on the long-range starting and request set information, Xiang Suoshu power battery management system
It issues and controls request electric under the power battery high pressure, so that the power battery management system is controlled the power battery and carry out
It is electric under high pressure；
Step S9 is completed under high pressure after electricity, power battery management system described in the vehicle control unit controls in the power battery
System carries out electricity under low pressure, to enter dormant state；
Step S10 is completed under low pressure after electricity in the power battery management system, and the lower electricity of the entire car controller itself, which enters, stops
Dormancy state.
3. charging method according to claim 2, which is characterized in that the low tension battery management system judges described low
When the carrying capacity of pressure battery is unsatisfactory for stopping charge condition, the method also includes:
Step S3 is repeated to step S6.
4. charging method according to claim 1, which is characterized in that in step S1:
Vehicle is in static condition are as follows: vehicle is in lower electricity and car door is in the state to latch, low tension battery management system
System determines whether vehicle is in power-down state according to the vehicle power state signal that the no key controller is sent, and according to vehicle
The vehicle door status signal that body controller is sent determines whether car door is in the state of latching；
Low tension battery is in power shortage state and refers to: the carrying capacity of low tension battery is lower than the state of the first preset threshold S0C1.
5. the method according to claim 1, wherein the running parameter of power battery includes: power in step S3
The current carrying capacity of battery and battery can use discharge power, and step S3 includes:
Step S31, entire car controller issues low pressure power on signal to power battery management system, to wake up the power battery pipe
Reason system；
Step S32, the power battery management system is after completing low pressure and powering on, by power battery current carrying capacity and battery
The entire car controller can be sent to discharge power；
Step S33, if the entire car controller determines that the current carrying capacity of power battery is higher than the second given threshold SOC2 and electricity
Chi Keyong discharge power is higher than the first setting power P 1, it is determined that vehicle meets charge condition；
Step S34, if the entire car controller determines the current carrying capacity of power battery lower than the 4th given threshold S0C4 or electricity
Chi Keyong discharge power is lower than the second setting power P 2, it is determined that vehicle is unsatisfactory for charge condition；
Wherein, the second given threshold S0C2 is greater than the 4th given threshold S0C4, and the first setting power P 1 is greater than the second setting power
P2。
6. charging method according to claim 1, which is characterized in that step S4 includes:
Step S41, the entire car controller issue high pressure power-up request to the power battery management system, make the power electric
Management system control power battery in pond carries out high pressure and powers on；
Step S42 judges whether that the signal that high pressure powers on is completed in the power battery for receiving power battery management system feedback；
Step S43, if receiving, the work for the power battery that the entire car controller is sent according to power battery management system
Parameter, repetition judge whether vehicle meets charge condition；
Step S44, if satisfied, then the entire car controller to DC-DC converter send DCDC work request；
Step S45 judges whether its signal for normally entering working condition for receiving DC-DC converter feedback；
Step S46, if receiving, the high-voltage electricity that the vehicle control unit controls DC-DC converter exports power battery is carried out
DCDC conversion thinks that low tension battery charges.
7. charging method according to claim 6, which is characterized in that if judging in step S3, vehicle is unsatisfactory for charging item
Part, if judging in step S42, entire car controller does not receive the power battery that power battery management system is fed back and height is completed
The signal powered on is pressed, if entire car controller described in step S43 repeats to sentence disconnected vehicle out and is unsatisfactory for charge condition, or, if step
Judge that entire car controller does not receive its signal for normally entering working condition of DC-DC converter feedback, the side in S45
Method further include:
Step S11, entire car controller send to low tension battery management system and mend Electricity Functional inhibition request；
Step S12, the low tension battery management system are based on the benefit Electricity Functional inhibition request, will be sent to no key controller
The benefit electricity request signal set of device, make no key controller will be sent to entire car controller long-range starting request set, with into
Enter step S8 to step S10.
8. charging method according to claim 7, which is characterized in that be based on vehicle in the low tension battery management system
The benefit Electricity Functional inhibition request that controller is sent, after being sent to the benefit electricity request signal set of no key controller, the side
Method further include:
Step S13, the low tension battery management system control itself into dormant state.
9. a kind of charging system of low tension battery characterized by comprising power battery, low tension battery, no key controller
Device, car body controller；Entire car controller；
Connect the low pressure of the low tension battery, the no key controller, the car body controller and the entire car controller
Battery management system；
Connect the power battery management system of the power battery and the entire car controller；
Connect the DC-DC converter of the power battery, the low tension battery and the entire car controller；
Wherein, the low tension battery management system in the vehicle power state signal sent according to the no key controller and
The vehicle door status signal that the car body controller is sent determines that vehicle is in static condition and determines that low tension battery is in power shortage
It when state, is sent to no key controller and mends electricity request, so that the no key controller is issued long-range starting request, to wake up place
In the entire car controller of dormant state；
The entire car controller receives power electric transmitted by the power battery management system waken up by its low pressure after being waken up
The running parameter in pond, and judge whether vehicle meets charge condition based on the running parameter；
When determining that vehicle meets charge condition, the entire car controller issues described in control to the power battery management system
Power battery carries out the request that high pressure powers on, and sends DCDC work request to the DC-DC converter, converts the DCDC
The high-voltage electricity that the power battery exports is converted to low tension to charge to the low tension battery by device.
10. a kind of electric car, which is characterized in that the charging system including low tension battery as claimed in claim 9.
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| CN201910632030.7A CN110315978A (en) | 2019-07-12 | 2019-07-12 | A kind of charging method of low tension battery, system and electric car |
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