CN104842816A - Torque control method and torque control device of electric vehicle - Google Patents
Torque control method and torque control device of electric vehicle Download PDFInfo
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- CN104842816A CN104842816A CN201410139382.6A CN201410139382A CN104842816A CN 104842816 A CN104842816 A CN 104842816A CN 201410139382 A CN201410139382 A CN 201410139382A CN 104842816 A CN104842816 A CN 104842816A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- 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
- Y02T10/72—Electric energy management in electromobility
Abstract
The invention discloses a torque control method and a torque control device of an electric vehicle. The torque control method of the electric vehicle comprises the steps of obtaining maximum discharge power of a battery, SOC of the battery, a current speed and a temperature of the battery of the electric vehicle; obtaining SOC protection power of the battery according to the maximum discharge power of the battery and the SOC of the battery; obtaining temperature protection power of the battery according to the SOC protection power of the battery and the temperature of the battery; obtaining first protection power according to the maximum discharge power of the battery and the temperature protection power of the battery; obtaining second protection power according to the current speed; and obtaining protection power of the vehicle according to the first protection power and the second protection power and performing torque control according to the protection power of the vehicle. According to the invention, through controlling the torque of the electric vehicle, the driving comfort can be improved; the normal safe running of the electric vehicle under the conditions of too low or too high temperature and idling of the vehicle is guaranteed; and the damage to the battery can also be avoided.
Description
Technical field
The present invention relates to electric vehicle engineering field, particularly a kind of torque control method of electronlmobil and a kind of torque control device of electronlmobil.
Background technology
Electronlmobil has that noise is little, pollution-free, zero-emission and the high feature of energy conversion efficiency, is the important channel solving urbanization auto pollution outstanding problem.Development of EV, by adjustment Industry Structure, the innovation ability improving major fields and the market competitiveness, promotes that the coordinated development of economic society exerts far reaching influence.The value of electronlmobil is not only carbon reduction, especially a kind of change of energy mode, and will bring the optimization of energy mix.Electronlmobil fundamentally can solve the problems such as oil dependence, environmental pollution, greenhouse gas emission and energy security, is the final selection of development new-energy automobile.And battery is the key components and parts of electronlmobil, be the power producer of electronlmobil, how optimize battery and use ability and prolongation battery to become the key issue studying electronlmobil now.In addition, low and/or when breaking down at battery electric quantity, electronlmobil and chaufeur are protected also extremely important.
In correlation technique, adopt the electric automobile torque control program shown in Fig. 1 to optimize battery and use ability, extending battery life and low and/or when breaking down at battery electric quantity, control electric automobile torque and electronlmobil and chaufeur are protected.As shown in Figure 1, the control program of correlation technique is specially: when battery SOC (State Of Charge, state-of-charge) is greater than setting SOC, SOC protects power to equal the maximum discharge power of battery.When battery SOC is less than setting SOC, the magnitude of power that the form that SOC protects power to equal to set up according to battery SOC is found, this magnitude of power is multiplied by SOC coefficient by the maximum discharge power of battery and obtains.When limping zone bit is 0, protection power equals SOC and protects power.When limping mark position 1, protection power equals limping power.By the product of protection power divided by motor speed and 2* π/60, obtain car load and protect moment of torsion.
But the control program in above-mentioned correlation technique also exists following defect: first, because SOC protects the Rule of judgment of power be: battery SOC is less than setting SOC.Just there is the situation of moment of torsion saltus step in this, such as when electronlmobil is greater than the situation of 20% at battery SOC, electronlmobil is in acceleration, and now the output torque of car load is very large, such as 150Nm, and be less than the condition of 20% when battery SOC once meet, the output torque of car load will become little value, such as a 30Nm at once, now, the moment of torsion of electronlmobil can produce a very large saltus step, makes the ride comfort of electronlmobil become very poor.Secondly; because the discharge performance of battery exists much relations with battery temperature; and when low temperature and high temperature; the discharge performance of battery can reduce greatly; now; the maximum discharge power of battery may be there is be multiplied by the SOC that SOC coefficient obtains and protect magnitude of power too little, cause the very little situation about can not exercise even of electronlmobil speed.Again, due to battery overvoltage, cross the reason such as gentle brake vacuum failure of pump cause electronlmobil limping mark position 1 time, protection power equals limping power, and power of walking lamely is steady state value.This just exist battery temperature too low or too high time, limping power is likely greater than the maximum discharge power of current battery, and causes premature breakdown to battery.Finally; load-carrying due to electronlmobil is not changeless; and the calibrating parameters of electronlmobil is generally demarcate according to full load conditions; when this just causes electronlmobil zero load to be exercised; may occur that the speed of electronlmobil exceedes the situation limiting the speed of a motor vehicle; there is potential safety hazard, the requirement of out of reach protection electronlmobil and chaufeur.Therefore, need to improve correlation technique.
Summary of the invention
Object of the present invention is intended to solve one of above-mentioned technical matters at least to a certain extent.
For this reason, one object of the present invention is the torque control method proposing a kind of electronlmobil, the torque control method of this electronlmobil is by controlling the moment of torsion of electronlmobil with regulation speed, not only can increase driving ride comfort, ensure that the normal safe of electronlmobil when temperature is too low or too high and vehicle is unloaded travels, can also avoid damaging battery.
Another object of the present invention is the torque control device proposing a kind of electronlmobil.
For achieving the above object, one aspect of the present invention embodiment proposes a kind of torque control method of electronlmobil, and the torque control method of this electronlmobil comprises the following steps: obtain the maximum discharge power of battery of electronlmobil, battery SOC, current vehicle speed and battery temperature; Battery SOC protection power is obtained according to the maximum discharge power of described battery and described battery SOC; Battery temperature protection power is obtained according to described battery SOC protection power and described battery temperature; The first protection power is obtained according to the maximum discharge power of described battery and described battery temperature protection power; The second protection power is obtained according to described current vehicle speed; Obtain car load protection power according to described first protection power and the second protection power, and carry out moment of torsion control according to described car load protection power.
First the torque control method of the electronlmobil that the embodiment of the present invention proposes obtains the maximum discharge power of battery of electronlmobil, battery SOC, current vehicle speed and battery temperature, and then obtain battery SOC protection power according to the maximum discharge power of battery and battery SOC and obtain battery temperature protection power according to battery SOC protection power and battery temperature, and after obtaining the first protection power according to the maximum discharge power of battery and battery temperature protection power and obtain the second protection power according to current vehicle speed, finally obtain car load protection power to carry out moment of torsion control according to the first protection power and the second protection power.The torque control method of this electronlmobil, by controlling the moment of torsion of electronlmobil with regulation speed, not only can increase driving ride comfort, ensures that the normal safe of electronlmobil when temperature is too low or too high and vehicle is unloaded travels, can also avoid damaging battery.
Further, in one embodiment of the invention, described according to the maximum discharge power of described battery and described battery temperature protection power obtain first protection power specifically comprise the following steps: to the maximum discharge power of described battery and described battery temperature protection power get little of to obtain battery protection power; Obtain limping zone bit and limping power; Described limping power and described battery protection power are got little of to obtain protection power of walking lamely; Described first protection power is obtained according to described limping zone bit, described limping protection power and described battery protection power.
Further, in one embodiment of the invention, when described limping zone bit is 0, described first protection power equals described battery protection power; When described limping zone bit is 1, described first protection power equals described limping protection power.
Further, in one embodiment of the invention, describedly obtain battery SOC protection power according to the maximum discharge power of described battery and described battery SOC and specifically comprise the following steps: obtain corresponding battery SOC coefficient according to described battery SOC and default battery SOC coefficient table; Described battery SOC protection power is obtained according to the maximum discharge power of described battery and described battery SOC coefficient.
Further, in one embodiment of the invention, describedly obtain battery temperature protection power according to described battery SOC protection power and described battery temperature and specifically comprise the following steps: obtain corresponding battery temperature coefficient according to described battery temperature and default battery temperature coefficient table; Described battery temperature protection power is obtained according to described battery SOC protection power and described battery temperature coefficient.
For achieving the above object, the present invention on the other hand embodiment also proposed a kind of torque control device of electronlmobil, the torque control device of this electronlmobil comprises: data obtaining module, the maximum discharge power of the battery for obtaining electronlmobil, battery SOC, current vehicle speed and battery temperature; Battery SOC protection power acquisition module, for obtaining battery SOC protection power according to the maximum discharge power of described battery and described battery SOC; Battery temperature protection power acquisition module, for obtaining battery temperature protection power according to described battery SOC protection power and described battery temperature; First protection power acquisition module, for obtaining the first protection power according to the maximum discharge power of described battery and described battery temperature protection power; Second protection power acquisition module, for obtaining the second protection power according to described current vehicle speed; Torque management module, for obtaining car load protection power according to described first protection power and the second protection power, and carries out moment of torsion control according to described car load protection power.
First the torque control device of the electronlmobil that the embodiment of the present invention proposes obtains the maximum discharge power of battery of electronlmobil by data obtaining module, battery SOC, current vehicle speed and battery temperature, and then battery SOC protection power acquisition module obtains battery SOC protection power according to the maximum discharge power of battery and battery SOC and battery temperature protection power acquisition module obtains battery temperature protection power according to battery SOC protection power and battery temperature, and after the first protection power acquisition module protects power acquisition module to obtain the second protection power according to current vehicle speed according to the maximum discharge power of battery and battery temperature protection power acquisition first protection power and second, final torque control module obtains car load protection power to carry out moment of torsion control according to the first protection power and the second protection power.The torque control device of this electronlmobil, by controlling the moment of torsion of electronlmobil with regulation speed, not only can increase driving ride comfort, ensures that the normal safe of electronlmobil when temperature is too low or too high and vehicle is unloaded travels, can also avoid damaging battery.
Further, in one embodiment of the invention, described first protection power acquisition module specifically comprises: battery protection power obtains submodule, for getting little of to obtain battery protection power to the maximum discharge power of described battery and described battery temperature protection power; Limping acquisition of information submodule, for obtaining limping zone bit and limping power; Protection power of walking lamely obtains submodule, little of to obtain protection power of walking lamely for getting described limping power and described battery protection power; First protection power obtains submodule, for obtaining described first protection power according to described limping zone bit, described limping protection power and described battery protection power.
Further, in one embodiment of the invention, when described limping zone bit is 0, described first protection power equals described battery protection power; When described limping zone bit is 1, described first protection power equals described limping protection power.
Further, in one embodiment of the invention, described battery SOC protection power acquisition module specifically comprises: battery SOC coefficient obtains submodule, for obtaining corresponding battery SOC coefficient according to described battery SOC and default battery SOC coefficient table; Battery SOC protection power obtains submodule, for obtaining described battery SOC protection power according to the maximum discharge power of described battery and described battery SOC coefficient.
Further, in one embodiment of the invention, described battery temperature protection power acquisition module specifically comprises: battery temperature coefficient obtains submodule, for obtaining corresponding battery temperature coefficient according to described battery temperature and default battery temperature coefficient table; Battery temperature protection power obtains submodule, for obtaining described battery temperature protection power according to described battery SOC protection power and described battery temperature coefficient.
The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
The present invention above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:
Fig. 1 is the structural representation of electric automobile torque control program in correlation technique;
Fig. 2 is the diagram of circuit of the torque control method of electronlmobil according to the embodiment of the present invention;
Fig. 3 is the structured flowchart of the torque control device of electronlmobil according to the embodiment of the present invention; With
Fig. 4 is the structural representation of the torque control device of electronlmobil according to an embodiment of the invention.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the present invention.In addition, the present invention can in different example repeat reference numerals and/or letter.This repetition is to simplify and clearly object, itself does not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique that the invention provides and the example of material, but those of ordinary skill in the art can recognize the property of can be applicable to of other techniques and/or the use of other materials.In addition, fisrt feature described below second feature it " on " structure can comprise the embodiment that the first and second features are formed as directly contact, also can comprise other feature and be formed in embodiment between the first and second features, such first and second features may not be direct contacts.
In describing the invention, it should be noted that, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
The torque control method of electronlmobil and the torque control device of electronlmobil that propose according to the embodiment of the present invention are described with reference to the accompanying drawings.
As shown in Figure 2, the torque control method of the electronlmobil of the embodiment of the present invention comprises the following steps:
S1, obtains the maximum discharge power of battery of electronlmobil, battery SOC, current vehicle speed and battery temperature.
Particularly, in one embodiment of the invention, the maximum discharge power of battery, battery SOC and battery temperature can by BMS(Battery Management System, battery management system) send in real time, therefore, VMS(VehicleManagement System, entire car controller) can CAN(Controller Area Network be passed through, controller local area network) obtain the signals such as the maximum discharge power of required battery, battery SOC and battery temperature from BMS.
S2, obtains battery SOC protection power according to the maximum discharge power of battery and battery SOC.
Further, in one embodiment of the invention, obtaining battery SOC according to the maximum discharge power of battery and battery SOC protects power and step S2 specifically to comprise the following steps:
S21, obtains corresponding battery SOC coefficient according to battery SOC and default battery SOC coefficient table.
Particularly, in one embodiment of the invention, VMS can set up according to battery SOC and preset battery SOC coefficient table, this default battery SOC coefficient table can adopt the smoothing process of linear interpolation algorithm to obtain, when to default battery SOC coefficient table input battery SOC, preset battery SOC coefficient table and export corresponding battery SOC coefficient.It should be noted that, the battery SOC coefficient preset in battery SOC coefficient table can be demarcated, and such as, when battery SOC equals 20%, battery SOC coefficient is 0.5, and when battery SOC equals 10%, battery SOC coefficient is 0.
S22, obtains battery SOC protection power according to the maximum discharge power of battery and battery SOC coefficient.
Particularly; in one embodiment of the invention; maximum for battery discharge power and battery SOC coefficient can be carried out multiplication and protect power to obtain battery SOC; thus in the change procedure of battery SOC; moment of torsion can be level and smooth change; actv. avoids the situation of moment of torsion saltus step, and ride comfort when electric powered motor travels is better.
S3, obtains battery temperature protection power according to battery SOC protection power and battery temperature.
Further, in one embodiment of the invention, obtaining battery temperature according to battery SOC protection power and battery temperature protects power and step S3 specifically to comprise the following steps:
S31, obtains corresponding battery temperature coefficient according to battery temperature and default battery temperature coefficient table.
Particularly, in one embodiment of the invention, VMS can set up according to battery temperature and preset battery temperature coefficient table, this default battery temperature coefficient table can adopt the smoothing process of linear interpolation algorithm to obtain, when to default battery temperature coefficient table input battery temperature, preset battery temperature coefficient table and export corresponding battery temperature coefficient.It should be noted that, the battery temperature coefficient preset in battery temperature coefficient table can be demarcated, and such as, when battery temperature equals-10 DEG C, battery temperature coefficient is 1.5, and when battery temperature equals 50 DEG C, battery temperature coefficient is 1.2.
S32, obtains battery temperature protection power according to battery SOC protection power and battery temperature coefficient.
Particularly; in one embodiment of the invention; battery SOC can be protected power and battery temperature coefficient to carry out multiplication and protect power to obtain battery temperature; thus can overcome when battery is under low temperature or high-temperature condition; because battery SOC protection power is too small, cause the very little problem even can not exercised of electronlmobil speed.
S4, obtains the first protection power according to the maximum discharge power of battery and battery temperature protection power.
Further, in one embodiment of the invention, obtaining first according to the maximum discharge power of battery and battery temperature protection power protects power and step S4 specifically to comprise the following steps:
S41, gets little of to obtain battery protection power to the maximum discharge power of battery and battery temperature protection power.
It should be noted that; get little of to obtain battery protection power to the maximum discharge power of battery and battery temperature protection power; can effectively avoid such as being greater than 20% comparatively greatly at battery SOC; and battery is when being in low-temperature condition, the battery temperature protection power caused is greater than the situation of the maximum discharge power of battery.
S42, obtains limping zone bit and limping power.
S43, gets little of to obtain protection power of walking lamely to limping power and battery protection power.
It should be noted that; limping power and battery protection power are got little of to obtain protection power of walking lamely; during can effectively avoid limping power to be greater than power that battery can provide, damage is caused to battery; thus reach and be in Claudication states at electronlmobil; and battery temperature be low temperature or high temperature when protect battery, extend service life of battery.
S44, according to limping zone bit, walk lamely protection power and battery protection power acquisition first protection power.
Further, in one embodiment of the invention, when limping zone bit is 0, the first protection power equals battery protection power, and when limping zone bit is 1, the first protection power equals protection power of walking lamely, and now, vehicle enters Claudication states.
S5, obtains the second protection power according to current vehicle speed.
Further, in one embodiment of the invention, obtain the second protection power according to current vehicle speed specifically to comprise the following steps:
S51, obtains the goal-selling speed of a motor vehicle and the goal-selling battery SOC of electronlmobil.
After the goal-selling speed of a motor vehicle getting electronlmobil and goal-selling battery SOC, enter step S52.
S52, arranges stated-speed sign position when current vehicle speed is greater than the goal-selling speed of a motor vehicle and battery SOC is less than goal-selling battery SOC.
In one embodiment of the invention, can arrange stated-speed sign position when current vehicle speed is greater than the goal-selling speed of a motor vehicle and battery SOC is less than goal-selling battery SOC is 1, enters step S53.
S53, subtracts computing to obtain the deviation speed of a motor vehicle to current vehicle speed and the goal-selling speed of a motor vehicle.
S54, carries out PID to the deviation speed of a motor vehicle and regulates to obtain PID power.
S55, carries out power range to PID power and limits to obtain speed limit power.
It should be noted that, power range is carried out to PID power and limits and the size of speed limit power can be controlled in preset range.
S56, obtains the second protection power according to speed limit power and stated-speed sign position.
Particularly, in one embodiment of the invention, when stated-speed sign position is 0, the second protection power equals zero power, and when stated-speed sign position is 1, the second protection power equals speed limit power.
S6, obtains car load protection power according to the first protection power and the second protection power, and carries out moment of torsion control according to car load protection power.
Further, in one embodiment of the invention, carry out moment of torsion according to car load protection power to control specifically to comprise the following steps:
S61, obtains the motor speed of electronlmobil.
S62, obtains car load protection moment of torsion according to motor speed and car load protection power.
Particularly; in one embodiment of the invention; can by carrying out multiplication to obtain motor angular velocity to motor speed and 2* π/60; computing is subtracted to obtain car load protection power to the first protection power and the second protection power, and then division operation is carried out to obtain car load protection moment of torsion to car load protection power and motor angular velocity.
S62, carries out moment of torsion control according to car load protection moment of torsion to electronlmobil.
First the torque control method of the electronlmobil that the embodiment of the present invention proposes obtains the maximum discharge power of battery of electronlmobil, battery SOC, current vehicle speed and battery temperature, and then obtain battery SOC protection power according to the maximum discharge power of battery and battery SOC and obtain battery temperature protection power according to battery SOC protection power and battery temperature, and after obtaining the first protection power according to the maximum discharge power of battery and battery temperature protection power and obtain the second protection power according to current vehicle speed, finally obtain car load protection power to carry out moment of torsion control according to the first protection power and the second protection power.The torque control method of this electronlmobil is by controlling the moment of torsion of electronlmobil with regulation speed; not only can increase driving ride comfort; ensure that the normal safe of electronlmobil when temperature is too low or too high and vehicle is unloaded travels; can also avoid damaging battery, reach the object of protection electronlmobil and chaufeur.
In addition; the present invention on the other hand embodiment also proposed a kind of torque control device of electronlmobil; as shown in Figure 3, the torque control device of this electronlmobil comprises: data obtaining module 10, battery SOC protection power acquisition module 20, battery temperature protection power acquisition module 30, first protect power acquisition module 40, second to protect power acquisition module 50 and torque management module 60.Wherein, battery maximum discharge power, battery SOC, current vehicle speed and the battery temperature of data obtaining module 10 for obtaining electronlmobil.Battery SOC protection power acquisition module 20 is for obtaining battery SOC protection power according to the maximum discharge power of battery and battery SOC.Battery temperature protection power acquisition module 30 is for obtaining battery temperature protection power according to battery SOC protection power and battery temperature.First protection power acquisition module 40 is for obtaining the first protection power according to the maximum discharge power of battery and battery temperature protection power.Second protection power acquisition module 50 is for obtaining the second protection power according to current vehicle speed.Torque management module 60 for obtaining car load protection power according to the first protection power and the second protection power, and carries out moment of torsion control according to car load protection power.
Particularly, in one embodiment of the invention, the maximum discharge power of battery, battery SOC and battery temperature can be sent in real time by BMS, and therefore, VMS can obtain the signals such as the maximum discharge power of required battery, battery SOC and battery temperature by CAN from BMS.
Further, in one embodiment of the invention, as shown in Figure 4, battery SOC protection power acquisition module 20 specifically can comprise: battery SOC coefficient obtains submodule 201 and battery SOC protection power obtains submodule 202.Wherein, battery SOC coefficient obtains submodule 201 for obtaining corresponding battery SOC coefficient according to battery SOC and default battery SOC coefficient table.Battery SOC protection power obtains submodule 202 for obtaining battery SOC protection power according to the maximum discharge power of battery and battery SOC coefficient.
Particularly, in one embodiment of the invention, battery SOC coefficient obtains submodule 201 can set up default battery SOC coefficient table according to battery SOC, this default battery SOC coefficient table can adopt the smoothing process of linear interpolation algorithm to obtain, when to default battery SOC coefficient table input battery SOC, preset battery SOC coefficient table and export corresponding battery SOC coefficient.It should be noted that, the battery SOC coefficient preset in battery SOC coefficient table can be demarcated, and such as, when battery SOC equals 20%, battery SOC coefficient is 0.5, and when battery SOC equals 10%, battery SOC coefficient is 0.Further; in one embodiment of the invention; maximum for battery discharge power and battery SOC coefficient can be carried out multiplication and protect power to obtain battery SOC by battery SOC protection power acquisition submodule 202; thus in the change procedure of battery SOC; moment of torsion can be level and smooth change; actv. avoids the situation of moment of torsion saltus step, and ride comfort when electric powered motor travels is better.
Further, in one embodiment of the invention, as shown in Figure 4, battery temperature protection power acquisition module 30 specifically can comprise: battery temperature coefficient obtains submodule 301 and battery temperature protection power obtains submodule 302.Wherein, battery temperature coefficient obtains submodule 301 for obtaining corresponding battery temperature coefficient according to battery temperature and default battery temperature coefficient table.Battery temperature protection power obtains submodule 302 for obtaining battery temperature protection power according to battery SOC protection power and battery temperature coefficient.
Particularly, in one embodiment of the invention, battery temperature coefficient obtains submodule 301 can set up default battery temperature coefficient table according to battery temperature, this default battery temperature coefficient table can adopt the smoothing process of linear interpolation algorithm to obtain, when to default battery temperature coefficient table input battery temperature, preset battery temperature coefficient table and export corresponding battery temperature coefficient.It should be noted that, the battery temperature coefficient preset in battery temperature coefficient table can be demarcated, and such as, when battery temperature equals-10 DEG C, battery temperature coefficient is 1.5, and when battery temperature equals 50 DEG C, battery temperature coefficient is 1.2.Further; in one embodiment of the invention; battery SOC can be protected power and battery temperature coefficient to carry out multiplication and protect power to obtain battery temperature by battery temperature protection power acquisition submodule 302; thus can overcome when battery is under low temperature or high-temperature condition; because battery SOC protection power is too small, cause the very little problem even can not exercised of electronlmobil speed.
Further; in one embodiment of the invention; as shown in Figure 4, the first protection power acquisition module 40 specifically can comprise: battery protection power obtains submodule 401, limping acquisition of information submodule 402, protection power of walking lamely obtains submodule 403 and the first protection power obtains submodule 404.Wherein, battery protection power obtains submodule 401 for getting little of to obtain battery protection power to the maximum discharge power of battery and battery temperature protection power.Limping acquisition of information submodule 402 is for obtaining limping zone bit and limping power.It is little of to obtain protection power of walking lamely for getting limping power and battery protection power that protection power of walking lamely obtains submodule 403.First protection power obtains submodule 404 for obtaining the first protection power according to limping zone bit, limping protection power and battery protection power.Particularly, in one embodiment of the invention, when limping zone bit is 0, the first protection power equals battery protection power, and when limping zone bit is 1, the first protection power equals protection power of walking lamely, and now, vehicle enters Claudication states.
It should be noted that; battery protection power obtains submodule 401 pairs of maximum discharge powers of battery and battery temperature protection power is got little of to obtain battery protection power; can effectively avoid such as being greater than 20% comparatively greatly at battery SOC; and battery is when being in low-temperature condition, the battery temperature protection power caused is greater than the situation of the maximum discharge power of battery.In addition; it should be noted that; protection power of walking lamely obtains submodule 403 and gets limping power and battery protection power little of to obtain protection power of walking lamely; during can effectively avoid limping power to be greater than power that battery can provide, damage is caused to battery; thus reach and be in Claudication states at electronlmobil; and battery temperature be low temperature or high temperature when protect battery, extend service life of battery.
Further; in one embodiment of the invention; as shown in Figure 4, the second protection power acquisition module 50 specifically can comprise: goal-selling acquisition of information submodule 501, stated-speed sign position arrange submodule 502, the deviation speed of a motor vehicle obtains submodule 503, PID power obtains submodule 504, speed limit power obtains submodule 505 and the second protection power obtains submodule 506.Wherein, goal-selling acquisition of information submodule 501 is for obtaining the goal-selling speed of a motor vehicle and the goal-selling battery SOC of electronlmobil.Stated-speed sign position arrange submodule 502 for be greater than the goal-selling speed of a motor vehicle when current vehicle speed and battery SOC is less than goal-selling battery SOC time stated-speed sign position is set, such as arranging stated-speed sign position is 1.The deviation speed of a motor vehicle obtains submodule 503 for subtracting computing to obtain the deviation speed of a motor vehicle to current vehicle speed and the goal-selling speed of a motor vehicle.PID power obtains submodule 504 and regulates to obtain PID power for carrying out PID to the deviation speed of a motor vehicle.Speed limit power obtains submodule 505 and limits to obtain speed limit power for carrying out power range to PID power.Second protection power obtains submodule 506 for obtaining the second protection power according to speed limit power and stated-speed sign position.Particularly, in one embodiment of the invention, when stated-speed sign position is 0, the second protection power equals zero power, and when stated-speed sign position is 1, the second protection power equals speed limit power.
Further, in one embodiment of the invention, as shown in Figure 4, torque management module 60 specifically can comprise: motor speed obtains submodule 601, car load protection moment of torsion obtains submodule 602 and moment of torsion controls submodule 603.Wherein, motor speed obtains submodule 601 for obtaining the motor speed of electronlmobil.Car load protection moment of torsion obtains submodule 602 for obtaining car load protection moment of torsion according to motor speed and car load protection power.Moment of torsion controls submodule 603 for carrying out moment of torsion control according to car load protection moment of torsion to electronlmobil.Particularly; in one embodiment of the invention; car load protection moment of torsion obtains submodule 602 can by carrying out multiplication to obtain motor angular velocity to motor speed and 2* π/60; computing is subtracted to obtain car load protection power to the first protection power and the second protection power, and then division operation is carried out to obtain car load protection moment of torsion to car load protection power and motor angular velocity.
First the torque control device of the electronlmobil that the embodiment of the present invention proposes obtains the maximum discharge power of battery of electronlmobil by data obtaining module, battery SOC, current vehicle speed and battery temperature, and then battery SOC protection power acquisition module obtains battery SOC protection power according to the maximum discharge power of battery and battery SOC and battery temperature protection power acquisition module obtains battery temperature protection power according to battery SOC protection power and battery temperature, and after the first protection power acquisition module protects power acquisition module to obtain the second protection power according to current vehicle speed according to the maximum discharge power of battery and battery temperature protection power acquisition first protection power and second, final torque control module obtains car load protection power to carry out moment of torsion control according to the first protection power and the second protection power.The torque control device of this electronlmobil is by controlling the moment of torsion of electronlmobil with regulation speed; not only can increase driving ride comfort; ensure that the normal safe of electronlmobil when temperature is too low or too high and vehicle is unloaded travels; can also avoid damaging battery, reach the object of protection electronlmobil and chaufeur.
Describe and can be understood in diagram of circuit or in this any process otherwise described or method, represent and comprise one or more for realizing the module of the code of the executable instruction of the step of specific logical function or process, fragment or part, and the scope of the preferred embodiment of the present invention comprises other realization, wherein can not according to order that is shown or that discuss, comprise according to involved function by the mode while of basic or by contrary order, carry out n-back test, this should understand by embodiments of the invention person of ordinary skill in the field.
In flow charts represent or in this logic otherwise described and/or step, such as, the sequencing list of the executable instruction for realizing logic function can be considered to, may be embodied in any computer-readable medium, for instruction execution system, device or equipment (as computer based system, comprise the system of treater or other can from instruction execution system, device or equipment fetch instruction and perform the system of instruction) use, or to use in conjunction with these instruction execution systems, device or equipment.With regard to this specification sheets, " computer-readable medium " can be anyly can to comprise, store, communicate, propagate or transmission procedure for instruction execution system, device or equipment or the device that uses in conjunction with these instruction execution systems, device or equipment.The example more specifically (non-exhaustive list) of computer-readable medium comprises following: the electrical connection section (electronics package) with one or more wiring, portable computer diskette box (magnetic device), random-access memory (ram), read-only memory (ROM) (ROM), erasablely edit read-only memory (ROM) (EPROM or flash memory), fiber device, and portable optic disk read-only memory (ROM) (CDROM).In addition, computer-readable medium can be even paper or other suitable media that can print described program thereon, because can such as by carrying out optical scanning to paper or other media, then carry out editing, decipher or carry out process with other suitable methods if desired and electronically obtain described program, be then stored in computer storage.
Should be appreciated that each several part of the present invention can realize with hardware, software, firmware or their combination.In the above-described embodiment, multiple step or method can with to store in memory and the software performed by suitable instruction execution system or firmware realize.Such as, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: the discrete logic with the logic gates for realizing logic function to data-signal, there is the special IC of suitable combinatory logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.
Those skilled in the art are appreciated that realizing all or part of step that above-described embodiment method carries is that the hardware that can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, this program perform time, step comprising embodiment of the method one or a combination set of.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, also can be that the independent physics of unit exists, also can be integrated in a module by two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.If described integrated module using the form of software function module realize and as independently production marketing or use time, also can be stored in a computer read/write memory medium.
The above-mentioned storage medium mentioned can be read-only memory (ROM), disk or CD etc.
In the description of this specification sheets, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments without departing from the principles and spirit of the present invention, scope of the present invention is by claims and equivalency thereof.
Claims (10)
1. a torque control method for electronlmobil, is characterized in that, comprises the following steps:
Obtain the maximum discharge power of battery of electronlmobil, battery charge state SOC, current vehicle speed and battery temperature;
Battery SOC protection power is obtained according to the maximum discharge power of described battery and described battery SOC;
Battery temperature protection power is obtained according to described battery SOC protection power and described battery temperature;
The first protection power is obtained according to the maximum discharge power of described battery and described battery temperature protection power;
The second protection power is obtained according to described current vehicle speed; With
Obtain car load protection power according to described first protection power and the second protection power, and carry out moment of torsion control according to described car load protection power.
2. the method for claim 1, is characterized in that, described according to the maximum discharge power of described battery and described battery temperature protection power obtain first protection power specifically comprise the following steps:
Get little of to obtain battery protection power to the maximum discharge power of described battery and described battery temperature protection power;
Obtain limping zone bit and limping power;
Described limping power and described battery protection power are got little of to obtain protection power of walking lamely; With
Described first protection power is obtained according to described limping zone bit, described limping protection power and described battery protection power.
3. method as claimed in claim 2, is characterized in that,
When described limping zone bit is 0, described first protection power equals described battery protection power;
When described limping zone bit is 1, described first protection power equals described limping protection power.
4. the method for claim 1, is characterized in that, describedly obtains battery SOC protection power according to the maximum discharge power of described battery and described battery SOC and specifically comprises the following steps:
Corresponding battery SOC coefficient is obtained according to described battery SOC and default battery SOC coefficient table; With
Described battery SOC protection power is obtained according to the maximum discharge power of described battery and described battery SOC coefficient.
5. the method for claim 1, is characterized in that, describedly obtains battery temperature protection power according to described battery SOC protection power and described battery temperature and specifically comprises the following steps:
Corresponding battery temperature coefficient is obtained according to described battery temperature and default battery temperature coefficient table; With
Described battery temperature protection power is obtained according to described battery SOC protection power and described battery temperature coefficient.
6. a torque control device for electronlmobil, is characterized in that, comprising:
Data obtaining module, the maximum discharge power of the battery for obtaining electronlmobil, battery charge state SOC, current vehicle speed and battery temperature;
Battery SOC protection power acquisition module, for obtaining battery SOC protection power according to the maximum discharge power of described battery and described battery SOC;
Battery temperature protection power acquisition module, for obtaining battery temperature protection power according to described battery SOC protection power and described battery temperature;
First protection power acquisition module, for obtaining the first protection power according to the maximum discharge power of described battery and described battery temperature protection power;
Second protection power acquisition module, for obtaining the second protection power according to described current vehicle speed; With
Torque management module, for obtaining car load protection power according to described first protection power and the second protection power, and carries out moment of torsion control according to described car load protection power.
7. device as claimed in claim 6, is characterized in that, described first protection power acquisition module specifically comprises:
Battery protection power obtains submodule, for getting little of to obtain battery protection power to the maximum discharge power of described battery and described battery temperature protection power;
Limping acquisition of information submodule, for obtaining limping zone bit and limping power;
Protection power of walking lamely obtains submodule, little of to obtain protection power of walking lamely for getting described limping power and described battery protection power; With
First protection power obtains submodule, for obtaining described first protection power according to described limping zone bit, described limping protection power and described battery protection power.
8. device as claimed in claim 7, is characterized in that,
When described limping zone bit is 0, described first protection power equals described battery protection power;
When described limping zone bit is 1, described first protection power equals described limping protection power.
9. device as claimed in claim 6, is characterized in that, described battery SOC protection power acquisition module specifically comprises:
Battery SOC coefficient obtains submodule, for obtaining corresponding battery SOC coefficient according to described battery SOC and default battery SOC coefficient table; With
Battery SOC protection power obtains submodule, for obtaining described battery SOC protection power according to the maximum discharge power of described battery and described battery SOC coefficient.
10. device as claimed in claim 6, is characterized in that, described battery temperature protection power acquisition module specifically comprises:
Battery temperature coefficient obtains submodule, for obtaining corresponding battery temperature coefficient according to described battery temperature and default battery temperature coefficient table; With
Battery temperature protection power obtains submodule, for obtaining described battery temperature protection power according to described battery SOC protection power and described battery temperature coefficient.
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| CN201410139382.6A CN104842816A (en) | 2014-04-08 | 2014-04-08 | Torque control method and torque control device of electric vehicle |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106541851A (en) * | 2015-09-17 | 2017-03-29 | 北汽福田汽车股份有限公司 | Pure electric automobile and motor control method and system and the application in battery protection |
| CN107472080A (en) * | 2016-10-31 | 2017-12-15 | 宝沃汽车（中国）有限公司 | Method for controlling torque, device and the vehicle of vehicle |
| CN108099698A (en) * | 2017-12-28 | 2018-06-01 | 上汽通用五菱汽车股份有限公司 | Electric vehicle and its control method and control device and readable storage medium storing program for executing |
| CN108128211A (en) * | 2016-12-01 | 2018-06-08 | 上海汽车集团股份有限公司 | New-energy automobile and its Motor torque determine method, apparatus and motor |
| CN110329237A (en) * | 2019-06-28 | 2019-10-15 | 潍柴动力股份有限公司 | Vehicle start control method, device, storage medium and vehicle |
| CN110341495A (en) * | 2019-06-11 | 2019-10-18 | 汉腾汽车有限公司 | A kind of electricity drives torque control method and its system |
| CN113573941A (en) * | 2019-03-13 | 2021-10-29 | 三菱自动车工业株式会社 | Vehicle control device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010003807A1 (en) * | 1999-12-10 | 2001-06-14 | Hee-Yong Lee | Shift control method for automatic transmission |
| EP1781967A2 (en) * | 2004-07-07 | 2007-05-09 | Eaton Corporation | Shift point strategy for hybrid electric vehicle transmission |
| US20070216312A1 (en) * | 2006-03-14 | 2007-09-20 | Makoto Ogata | Control device for a hybrid electric vehicle |
| CN101549686A (en) * | 2009-05-12 | 2009-10-07 | 奇瑞汽车股份有限公司 | Electric automobile system protection control method |
| CN101695912A (en) * | 2009-10-26 | 2010-04-21 | 纽贝耳汽车(杭州)有限公司 | Entire electric car control method |
| CN102529956A (en) * | 2012-03-02 | 2012-07-04 | 潍柴动力股份有限公司 | Method and system for starting hybrid electrical vehicle |
| CN103692925A (en) * | 2013-12-20 | 2014-04-02 | 奇瑞汽车股份有限公司 | Economical driving mode control system of electric automobile |
-
2014
- 2014-04-08 CN CN201410139382.6A patent/CN104842816A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010003807A1 (en) * | 1999-12-10 | 2001-06-14 | Hee-Yong Lee | Shift control method for automatic transmission |
| EP1781967A2 (en) * | 2004-07-07 | 2007-05-09 | Eaton Corporation | Shift point strategy for hybrid electric vehicle transmission |
| US20070216312A1 (en) * | 2006-03-14 | 2007-09-20 | Makoto Ogata | Control device for a hybrid electric vehicle |
| CN101549686A (en) * | 2009-05-12 | 2009-10-07 | 奇瑞汽车股份有限公司 | Electric automobile system protection control method |
| CN101695912A (en) * | 2009-10-26 | 2010-04-21 | 纽贝耳汽车(杭州)有限公司 | Entire electric car control method |
| CN102529956A (en) * | 2012-03-02 | 2012-07-04 | 潍柴动力股份有限公司 | Method and system for starting hybrid electrical vehicle |
| CN103692925A (en) * | 2013-12-20 | 2014-04-02 | 奇瑞汽车股份有限公司 | Economical driving mode control system of electric automobile |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106541851A (en) * | 2015-09-17 | 2017-03-29 | 北汽福田汽车股份有限公司 | Pure electric automobile and motor control method and system and the application in battery protection |
| CN107472080A (en) * | 2016-10-31 | 2017-12-15 | 宝沃汽车（中国）有限公司 | Method for controlling torque, device and the vehicle of vehicle |
| CN108128211A (en) * | 2016-12-01 | 2018-06-08 | 上海汽车集团股份有限公司 | New-energy automobile and its Motor torque determine method, apparatus and motor |
| CN108099698A (en) * | 2017-12-28 | 2018-06-01 | 上汽通用五菱汽车股份有限公司 | Electric vehicle and its control method and control device and readable storage medium storing program for executing |
| CN113573941A (en) * | 2019-03-13 | 2021-10-29 | 三菱自动车工业株式会社 | Vehicle control device |
| CN113573941B (en) * | 2019-03-13 | 2023-07-18 | 三菱自动车工业株式会社 | Vehicle control device |
| CN110341495A (en) * | 2019-06-11 | 2019-10-18 | 汉腾汽车有限公司 | A kind of electricity drives torque control method and its system |
| CN110329237A (en) * | 2019-06-28 | 2019-10-15 | 潍柴动力股份有限公司 | Vehicle start control method, device, storage medium and vehicle |
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