CN103754129B - State-feedback-free control method for direct-current charger for low-voltage storage batteries of pure electric vehicles - Google Patents
State-feedback-free control method for direct-current charger for low-voltage storage batteries of pure electric vehicles Download PDFInfo
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- CN103754129B CN103754129B CN201410003325.5A CN201410003325A CN103754129B CN 103754129 B CN103754129 B CN 103754129B CN 201410003325 A CN201410003325 A CN 201410003325A CN 103754129 B CN103754129 B CN 103754129B
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- tension battery
- charging motor
- low tension
- voltage
- pure electric
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The invention relates to a state-feedback-free control method for a direct-current charger for pure electric vehicles. Voltage feedback of low-voltage storage batteries is introduced while the direct-current charger for the low-voltage storage batteries of the pure electric vehicles can be effectively controlled by the state-feedback-free control method, so that faults of a working state of the direct-current charger for the low-voltage storage batteries can be diagnosed. The state-feedback-free control method has the advantages that high-voltage power batteries can be safely managed, and faults of the low-voltage storage batteries and the faults of the direct-current charger for the low-voltage storage batteries can be diagnosed.
Description
Technical field
The invention belongs to charging electric vehicle technical field, more particularly, to a kind of pure electric automobile low pressure of stateless feedback
Battery DC charging motor control method.
Background technology
Growing tension with international crude petroleum resource and environmental pollution cause the requirement increasingly stringent to vehicle discharge, new energy
Source vehicle is increasingly becoming a big core R＆D direction of Liao Ge great automobile vendor.In " 12 " in the works, new-energy automobile
Develop into country gives priority to project, has obtained paying much attention to and support energetically of country.National high-tech research is sent out
Exhibition plan（863 plans）In also new-energy automobile and relevant item as emphasis, support new-energy automobile with all one's strength and related produce
The development of industry.Under the leading of various preferential policies and motivator, the electric automobile Demonstration And Extension project mushroom development in the whole world,
Private consumption market is increasingly active, and each side greatly reinforces to the market expectations of electric automobile.
As new-energy automobile, the particularly critical component of pure electric automobile, vehicle power all plays non-all the time
Often important role.Power battery pack, as car load sole power source, it is desirable to provide to the pneumatics of motor, air-conditioning system
Contracting machine, the oil pump of power steering system, the vavuum pump of brakes, low tension battery DC charging motor；And low tension battery,
Need power battery pack to be charged by low tension battery DC charging motor, be car load light-current system, cooling system,
Display instrument, lighting, power-assisted steering motor, rain shaving electrical machine, air bag and rearview mirror adjust motor etc. and provide power supply etc.
Recoil simulator etc. provides working power.And the charged state of low tension battery by entire car controller according to the operating condition of car load
Low tension battery DC charging motor is controlled to complete.
At present, common low tension battery DC charging motor has carrier state feedback and not carrier state two types, for band
The low tension battery DC charging motor of feedback of status, common control method is：Entire car controller is according to high voltage power battery electricity
Amount size determines the working condition of low tension battery DC charging motor, then uses the feedback information of low tension battery DC charging motor
As foundation, low tension battery DC charging motor is carried out with fault diagnosis and working condition adjustment；Low for stateless feedback
Pressure battery DC charging motor, existing technology is substantially open-loop control method, and entire car controller cannot obtain feedback letter
Breath, thus cannot be carried out low tension battery DC charging motor fault diagnosis.
Content of the invention
It is an object of the invention to provide a kind of pure electric automobile low tension battery DC charging motor of stateless feedback controls
Method, to overcome deficiencies of the prior art.
The purpose of the present invention is to be achieved through the following technical solutions：A kind of pure electric automobile direct current of stateless feedback
Charger control method, comprises the following steps：
Step 1）Entire car controller passes through hardware interface or car load CAN network receives brake pedal signal, automobile gear level
State, enabling signal, high voltage power battery status, GES, charging gun signal；
Step 2）Entire car controller judges to remain static when vehicle, automobile gear level is in neutral, driver steps on system
Dynamic pedal, no emergency stop switch press, no charging gun signal, has enabling signal, has judgement driver to have high pressure power-up request, whole
Electricity on vehicle controller system high pressure, when motor busbar voltage rises and after close to cell voltage, entire car controller decision-making system
Electricity success on high pressure；
Step 3）The more current high-tension battery electricity of entire car controller and DC charging motor make workable high-tension battery
Power threshold, determines whether that possessing DC charging motor makes workable condition；
Step 4）If DC charging motor enables, the low tension battery collecting voltage is carried out low pass by entire car controller
Filtering process；
Step 5）In DC charging motor charge fault detection time, entire car controller is by filtered low tension battery
Voltage and low tension battery charge fault threshold value are compared, and judge whether DC charging motor is faulty；And
Step 6）When driving, entire car controller all the time using filtered low tension battery voltage as feedback
Signal, with step 5）Carry out DC charging motor fault detect.
Further, described step 1）Mesohigh electrokinetic cell state includes state of charge, voltage status and electric current shape
State.
Further, described step 2）In, electricity success on entire car controller decision-making system high pressure, motor busbar voltage rises
And close to cell voltage concrete ratio be 90%.
Further, described step 3）In, if current high-tension battery electricity makes workable height more than DC charging motor
Piezoelectric battery power threshold, DC charging motor enables, and otherwise DC charging motor does not enable.
Further, described step 3）In, high-tension battery power threshold is specially 10%.
Further, described step 4）In, when low tension battery voltage rises, selection filter constant is T1；Low pressure electric power storage
When cell voltage declines, selection filter constant is T2.
Further, described step 4）In, the filter constant value that low tension battery voltage rises is specially 0.5 second；Low pressure
The filter constant value of storage battery drops is specially 2 seconds.
Further, described step 5）In, if filtered low tension battery voltage is less than low tension battery always and charges
Fault threshold, then judge DC charging motor fault, closes DC charging motor and enables, and reports DC charging motor fault message, otherwise,
DC charging motor normally enables work.
Further, described step 5）In, low tension battery DC charging motor failure detection time value is specially 10 seconds；
Low tension battery charge fault threshold value is specially 12 volts.
Beneficial effects of the present invention are：The present invention can be by introducing battery tension signal, in low tension battery direct current
In the case of charger stateless feedback, solve low tension battery DC charging motor charged state monitoring problem, solve simultaneously
The troubleshooting issue of low tension battery DC charging motor.In addition, it is different in low tension battery voltage raising and lowering
Signal filtering constant, battery tension rapid increase when reaching low tension battery DC charging motor enable work, it is to avoid low pressure
Battery DC charging motor work after battery decline because of load changing lead to entire car controller wrong diagnosis problem occur, increase
The high voltage power battery of whole-control system and the reliability of low tension battery.
Brief description
Below according to accompanying drawing, the present invention is described in further detail.
Fig. 1 is the control of the pure electric automobile DC charging motor control method of stateless feedback described in the embodiment of the present invention
Flow chart processed；
Fig. 2 is low tension battery voltage change and low pressure electric power storage under no-voltage feedback described in the embodiment of the present invention
Pond DC charging motor enables working state schematic representation；
Fig. 3 be described in the embodiment of the present invention have Voltage Feedback but no-voltage filtering in the case of low tension battery voltage become
Change and enable working state schematic representation with low tension battery DC charging motor；
Fig. 4 is that the Voltage Feedback that has described in the embodiment of the present invention also has low tension battery voltage change in the case of voltage filter
Change and enable working state schematic representation with low tension battery DC charging motor.
Specific embodiment
As Figure 1-4, a kind of pure electric automobile low tension battery of the stateless feedback described in the embodiment of the present invention is straight
Current charge control method, when vehicle is in high pressure power-up state, the voltage according to high voltage power battery electric quantity and low tension battery,
According to following steps, low tension battery DC charging motor is controlled：
Step 1）Entire car controller passes through hardware interface or car load CAN network receives brake pedal signal, automobile gear level
State, enabling signal, high voltage power battery status（Electricity, voltage, electric current）, GES, charging gun signal；
Step 2）Entire car controller judges to remain static when vehicle, automobile gear level is in neutral, driver steps on system
Dynamic pedal, no emergency stop switch press, no charging gun signal, has enabling signal, has judgement driver to have high pressure power-up request, whole
Electricity on vehicle controller system high pressure, when motor busbar voltage rises and after close to cell voltage 90%, entire car controller is sentenced
Determine electricity success on system high pressure；
Step 3）The more current high-tension battery electricity of entire car controller and low tension battery DC charging motor enable work
High-tension battery power threshold, determine whether that possessing low tension battery DC charging motor makes workable condition, if current height
After piezoelectric battery electricity is more than 10%, low tension battery DC charging motor enables；Otherwise low tension battery DC charging motor does not make
Energy；
Step 4）The low tension battery collecting voltage is carried out low-pass filtering treatment, low tension battery by entire car controller
When voltage rises, choosing filter constant is 0.2 second；When low tension battery voltage declines, choosing filter constant is 2 seconds；
Step 5）In 10s, filtered low tension battery voltage and 12 volts are compared by entire car controller
Relatively, judge whether low tension battery DC charging motor is faulty；If filtered low tension battery voltage is less than 12 always
During volt, then judge low tension battery DC charging motor fault, close low tension battery DC charging motor and enable, and report low pressure
Battery DC charging motor fault message；Conversely, low tension battery DC charging motor normally enables work；
Step 6）When driving, entire car controller all the time using filtered low tension battery voltage as feedback
Signal, with step 5）Carry out low tension battery DC charging motor fault detect.
Fig. 2 feeds back for no-voltage, and in t1 moment low tension battery DC charging motor when normally to fault, low pressure stores
The abnormal situation of cell voltage, in such a case, car load cannot be carried out low tension battery DC charging motor malfunction monitoring, and
Allow low tension battery DC charging motor enable work always；Fig. 3 is to have Voltage Feedback, but no-voltage filtering, due to voltage
Fluctuation leads to low tension battery DC charging motor frequently to switch in work between not working, and so can affect low tension battery
DC charging motor and the use state of low tension battery, also can affect its service life；Fig. 4 is to have Voltage Feedback, also has
Voltage filter, during battery-voltage fluctuation, low tension battery DC charging motor will not frequently carry out switch switching, until t2
In the moment, battery tension drops to 10 volts always, and continues one section after 2 seconds, and entire car controller just judges low tension battery
DC charging motor or low tension battery fault.Ensure that low tension battery DC charging motor and low tension battery to greatest extent
Normal work.
The present invention is not limited to above-mentioned preferred forms, and anyone can show that under the enlightenment of the present invention other are various
The product of form, however, making any change in its shape or structure, every have skill identical or similar to the present application
Art scheme, is within the scope of the present invention.
Claims (9)
1. a kind of pure electric automobile low tension battery DC charging motor control method of stateless feedback is it is characterised in that include
Following steps：Step 1）Entire car controller passes through hardware interface or car load CAN network receives brake pedal signal, vehicle
Range state,
Enabling signal, high voltage power battery status, GES, charging gun signal；
Step 2）Entire car controller judges to remain static when vehicle, automobile gear level is in neutral, driver steps on braking and steps on
Plate, no emergency stop switch press, no charging gun signal, has enabling signal, has judgement driver to have high pressure power-up request, full-vehicle control
Electricity on device system high pressure, after motor busbar voltage rises and reaches cell voltage, electricity on entire car controller decision-making system high pressure
Success；
Step 3）The more current high-tension battery electricity of entire car controller and DC charging motor make workable high-tension battery electricity
Threshold value, determines whether that possessing DC charging motor makes workable condition；
Step 4）If DC charging motor enables, the low tension battery collecting voltage is carried out LPF by entire car controller
Process；
Step 5）In DC charging motor charge fault detection time, entire car controller is by filtered low tension battery voltage
It is compared with low tension battery charge fault threshold value, judge whether DC charging motor is faulty；And
Step 6）When driving, entire car controller all the time using filtered low tension battery voltage as feedback signal,
With step 5）Carry out DC charging motor fault detect.
2. the pure electric automobile low tension battery DC charging motor controlling party of the stateless feedback according to claim 1
Method it is characterised in that：Described step 1）Mesohigh electrokinetic cell state includes state of charge, voltage status and electric current shape
State.
3. a kind of pure electric automobile low tension battery DC charging motor of the stateless feedback according to claim 1 controls
Method it is characterised in that：Described step 2）In, electricity success on entire car controller decision-making system high pressure, in motor busbar voltage
The concrete ratio rising and reaching cell voltage is 90%.
4. a kind of pure electric automobile low tension battery DC charging motor of the stateless feedback according to claim 1 controls
Method it is characterised in that：Described step 3）In, if current high-tension battery electricity makes workable height more than DC charging motor
Piezoelectric battery power threshold, DC charging motor enables, and otherwise DC charging motor does not enable.
5. a kind of pure electric automobile low tension battery DC charging motor of the stateless feedback according to claim 1 controls
Method it is characterised in that：Described step 3）In, high-tension battery power threshold is specially DC charging motor and enables working battery electricity
The 10% of amount.
6. a kind of pure electric automobile low tension battery DC charging motor of the stateless feedback according to claim 1 controls
Method it is characterised in that：Described step 4）In, when low tension battery voltage rises, selection filter constant is T1；Low pressure stores
When cell voltage declines, selection filter constant is T2.
7. a kind of pure electric automobile low tension battery DC charging motor of the stateless feedback according to claim 6 controls
Method it is characterised in that：Described step 4）In, the filter constant value that low tension battery voltage rises is specially 0.5 second；
The filter constant value that low tension battery voltage declines is specially 2 seconds.
8. a kind of pure electric automobile low tension battery DC charging motor of the stateless feedback according to claim 1 controls
Method it is characterised in that：Described step 5）In, if filtered low tension battery voltage is less than low tension battery always and charges
Fault threshold, then judge DC charging motor fault, closes DC charging motor and enables, and reports DC charging motor fault message, otherwise,
DC charging motor normally enables work.
9. a kind of pure electric automobile low tension battery DC charging motor of stateless feedback described according to Claim 8 controls
Method it is characterised in that：Described step 5）In, low tension battery DC charging motor failure detection time value is specially 10 seconds；
Low tension battery charge fault threshold value is specially 12 volts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410003325.5A CN103754129B (en) | 2014-01-03 | 2014-01-03 | State-feedback-free control method for direct-current charger for low-voltage storage batteries of pure electric vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410003325.5A CN103754129B (en) | 2014-01-03 | 2014-01-03 | State-feedback-free control method for direct-current charger for low-voltage storage batteries of pure electric vehicles |
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| Publication Number | Publication Date |
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| CN103754129A CN103754129A (en) | 2014-04-30 |
| CN103754129B true CN103754129B (en) | 2017-02-08 |
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| CN201410003325.5A Expired - Fee Related CN103754129B (en) | 2014-01-03 | 2014-01-03 | State-feedback-free control method for direct-current charger for low-voltage storage batteries of pure electric vehicles |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104648178B (en) * | 2015-02-11 | 2017-03-08 | 安徽江淮汽车集团股份有限公司 | A kind of charging electrification control method based on pure electric automobile |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102381209A (en) * | 2011-10-13 | 2012-03-21 | 奇瑞汽车股份有限公司 | Fault managing method for low-voltage storage battery of pure electric automobile |
| CN102437618A (en) * | 2011-12-29 | 2012-05-02 | 三一重工股份有限公司 | Battery control device and vehicle as well as battery control method |
| CN102545573A (en) * | 2010-12-29 | 2012-07-04 | 上海汽车集团股份有限公司 | Enabling control method and output voltage control method of direct current-direct current converter (DC-DC converter) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010124581A (en) * | 2008-11-19 | 2010-06-03 | Panasonic Corp | Vehicle power supply |
| JP2010206885A (en) * | 2009-03-02 | 2010-09-16 | Omron Corp | Charging control apparatus and method, charger and program |
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2014
- 2014-01-03 CN CN201410003325.5A patent/CN103754129B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102545573A (en) * | 2010-12-29 | 2012-07-04 | 上海汽车集团股份有限公司 | Enabling control method and output voltage control method of direct current-direct current converter (DC-DC converter) |
| CN102381209A (en) * | 2011-10-13 | 2012-03-21 | 奇瑞汽车股份有限公司 | Fault managing method for low-voltage storage battery of pure electric automobile |
| CN102437618A (en) * | 2011-12-29 | 2012-05-02 | 三一重工股份有限公司 | Battery control device and vehicle as well as battery control method |
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Granted publication date: 20170208 Termination date: 20210103 |