CN111942366A - Energy distribution method and system for high-voltage battery of hybrid vehicle - Google Patents

Energy distribution method and system for high-voltage battery of hybrid vehicle Download PDF

Info

Publication number
CN111942366A
CN111942366A CN202010729409.2A CN202010729409A CN111942366A CN 111942366 A CN111942366 A CN 111942366A CN 202010729409 A CN202010729409 A CN 202010729409A CN 111942366 A CN111942366 A CN 111942366A
Authority
CN
China
Prior art keywords
power
motor
discharge
information
current
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202010729409.2A
Other languages
Chinese (zh)
Other versions
CN111942366B (en
Inventor
杨黎健
陈立华
吴蒙
刘方
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangzhou Automobile Group Co Ltd
Original Assignee
Guangzhou Automobile Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangzhou Automobile Group Co Ltd filed Critical Guangzhou Automobile Group Co Ltd
Priority to CN202010729409.2A priority Critical patent/CN111942366B/en
Publication of CN111942366A publication Critical patent/CN111942366A/en
Application granted granted Critical
Publication of CN111942366B publication Critical patent/CN111942366B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
    • B60W20/15—Control strategies specially adapted for achieving a particular effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/24—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means
    • B60W10/26—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means for electrical energy, e.g. batteries or capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/24—Energy storage means
    • B60W2510/242—Energy storage means for electrical energy
    • B60W2510/244—Charge state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/30—Auxiliary equipments
    • B60W2510/305—Power absorbed by auxiliaries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/08—Electric propulsion units
    • B60W2710/086—Power

Abstract

The invention relates to a high-voltage battery energy distribution method and a system thereof for a hybrid vehicle, wherein the hybrid vehicle is provided with a first motor and a second motor, and the method comprises the following steps: acquiring current power information of a vehicle, wherein the current power information comprises current battery power information, accessory consumed power information, first motor power information, second motor power information and driving required power information; acquiring the discharge demand information of a second motor, and determining the current power distribution mode according to the discharge demand information of the second motor; and calculating the distribution value of the charging power and the discharging power of the first motor and the distribution value of the charging power and the discharging power of the second motor according to the current power information based on the current power distribution mode. The invention can improve the performance of the hybrid vehicle.

Description

Energy distribution method and system for high-voltage battery of hybrid vehicle
Technical Field
The invention relates to the technical field of hybrid vehicles, in particular to a method and a system for distributing energy of high-voltage batteries of a hybrid vehicle.
Background
In a hybrid vehicle, two electric machines are generally provided, and both electric machines obtain or transmit energy from a high-voltage battery to ensure the normal operation of the vehicle. Usually, the two motors are in opposite working states, for example, one motor is responsible for driving and obtaining energy from the high-voltage battery, and the other motor is responsible for generating and delivering energy to the high-voltage battery, and at the moment, the two motors do not relate to the conflict of the energy of the high-voltage battery. When the two motors are required to be driven or generate power simultaneously in the vehicle running mode, the energy of the high-voltage battery needs to be reasonably distributed to ensure that the two motors can obtain respective requirements, and energy competition and overdraft energy of the high-voltage battery are avoided.
In a new energy hybrid vehicle type, according to the installation position of the motor, as shown in fig. 1, various combinations can be performed to form respective hybrid configurations, for example, the configurations adopting the double motors can have different combinations of P1+ P3, P2+ P3, P1+ P4, and the like. Currently, the energy distribution strategy for high voltage batteries is mostly based on the ratio of external characteristics of two motors for fixed ratio distribution, for example, at a specific rotation speed (e.g. 1000rpm), the maximum torque provided by the first motor is 300Nm, the maximum torque provided by the second motor is 200Nm, and the ratio of the distributed energy of the two motors is 3: 2. That is, if the high-voltage battery can currently provide 100kw of discharge power and the accessory consumes 10kw, the first motor available discharge power is (100-10) × 3 ÷ (3+2) ═ 54kw, and the second motor available discharge power is (100-10) × 2 ÷ (3+2) × 36 kw.
In the process of implementing the invention, the inventor finds that the prior art has at least the following technical problems:
for the fixed rate energy distribution, when the energy of the high-voltage battery is low, the performance of the motor cannot be fully exerted, particularly for a hybrid vehicle type, one motor is usually driven, and the other motor is usually generating, but if the discharge power provided by the high-voltage battery is 50kw at this time, the charging power provided by the high-voltage battery is also 50kw, and the accessory consumption power is 10 kw. In this way, the first motor can only obtain the driving energy of (50-10) × 3 ÷ (3+2) ═ 24kw at most, the second motor can only obtain the generating energy of (50+10) × 2 ÷ (3+2) × 24kw, and the working intervals of the two motors are opposite, the first motor can completely use the driving energy of 50-10 ÷ 40kw, and the second motor can also completely use the generating energy of 50+10 ÷ 60 kw. Therefore, the energy distribution is performed at a fixed ratio, the performance of both motors is not fully utilized, and the performance of the vehicle is limited.
Disclosure of Invention
The invention aims to provide a high-voltage battery energy distribution method and a high-voltage battery energy distribution system for a hybrid vehicle, which aim to solve the technical problems that the performance of two motors cannot be fully exerted and the performance of the vehicle is limited because a new energy hybrid vehicle type provided with the two motors performs high-voltage battery energy distribution according to a fixed ratio.
To achieve the above object, an embodiment of the present invention proposes a high-voltage battery energy distribution method for a hybrid vehicle provided with a first motor and a second motor, the method including:
acquiring current power information of a vehicle, wherein the current power information comprises current battery power information, accessory consumed power information, first motor power information, second motor power information and driving required power information;
acquiring the discharge demand information of a second motor, and determining the current power distribution mode according to the discharge demand information of the second motor;
and calculating the distribution value of the charging power and the discharging power of the first motor and the distribution value of the charging power and the discharging power of the second motor according to the current power information based on the current power distribution mode.
Optionally, determining the current power distribution mode according to the discharge demand information of the second motor includes:
when the second motor has a discharge demand except for vehicle driving, determining that the current power distribution mode is a first power distribution mode;
and when the second motor has no discharging requirement except for vehicle driving, determining the current power distribution mode as the second power distribution mode.
OptionallyThe battery power information includes a battery allowable charging power PcAnd battery allowable discharge power Pd(ii) a The first motor power information includes a maximum allowable charging power P of the first motormec1Maximum permissible discharge power P of the first electric machinemed1(ii) a The second motor power information includes a maximum allowable charging power P of the second motormec2Maximum allowable discharge power P of the second motormed2(ii) a The driving demand power information includes driving demand drive power PddDriving demand recovery power Pdc；
Wherein, the calculating the distribution value of the charging power and the discharging power of the first motor and the distribution value of the charging power and the discharging power of the second motor according to the current power information based on the current power distribution mode comprises:
obtaining the discharge demand power P in addition to the vehicle drivened1；
Based on the first power distribution mode, according to the discharge demand power Pned1Calculating a charging power distribution value P of a second motor according to the current power information and the current driving demand informationD2And a discharge power distribution value PC2；
Obtaining actual charging power P of the second motorec1And the actual discharge power Ped1And according to the current power information, the current driving demand information and the actual discharge power P of the second motored1And actual charging power Pec1Calculating a charging power distribution value P of the first electric machineC1And a discharge power distribution value PD1。
Optionally, wherein:
PD2＝min{Pmed2,((Pd-Pa)-min(Pdd,Pmed1)+Pned1+min(Pdc,Pmec1))}；
PC2＝min{Pmec2,((Pc+Pa)+min(Pdd,Pmed1)-min(Pdc,Pmec1))}；
PD1＝min{Pmed1,((Pd-Pa)-Ped1+Pec1)}；
PC1＝min{Pmec1,((Pc+Pa)+Ped1-Pec1)}。
optionally, the calculating, based on the current power allocation manner, an allocation value of charging power and discharging power of the first motor and an allocation value of charging power and discharging power of the second motor according to the current power information includes:
calculating a charging power distribution value P of a second motor according to the current power information and the current driving demand information based on a second power distribution modeD2And a discharge power distribution value PC2；
Obtaining actual charging power P of the second motorec1And the actual discharge power Ped1And according to the current power information, the current driving demand information and the actual discharge power P of the second motored1And actual charging power Pec1Calculating a charging power distribution value P of the first electric machineC1And a discharge power distribution value PD1。
Optionally, wherein:
PD2＝min{Pmed2,((Pd-Pa)-min(Pdd,Pmed1)+min(Pdc,Pmec1))}；
PC2＝min{Pmec2,((Pc+Pa)+min(Pdd,Pmed1)-min(Pdc,Pmec1))}；
PD1＝min{Pmed1,((Pd-Pa)-Ped1+Pec1)}；
PC1＝min{Pmec1,((Pc+Pa)+Ped1-Pec1)}。
to achieve the above object, an embodiment of the present invention also proposes a high-voltage battery energy distribution system for a hybrid vehicle provided with a first motor and a second motor, the system including:
the system comprises a first power acquisition unit, a second power acquisition unit and a control unit, wherein the first power acquisition unit is used for acquiring current power information of a vehicle, and the current power information comprises current battery power information, accessory consumed power information, first motor power information, second motor power information and driving required power information;
the distribution mode determining unit is used for acquiring the discharge demand information of the second motor and determining the current power distribution mode according to the discharge demand information of the second motor; and
and the power distribution calculation unit is used for calculating the distribution values of the charging power and the discharging power of the first motor and the distribution values of the charging power and the discharging power of the second motor according to the current power information based on the current power distribution mode.
Optionally, the allocation manner determining unit is specifically configured to:
when the second motor has a discharge demand except for vehicle driving, determining that the current power distribution mode is a first power distribution mode; and when the second motor has no discharging requirement except for vehicle driving, determining the current power distribution mode as the second power distribution mode.
Optionally, the battery power information includes a battery allowable charging power PcAnd battery allowable discharge power Pd(ii) a The first motor power information includes a maximum allowable charging power P of the first motormec1Maximum permissible discharge power P of the first electric machinemed1(ii) a The second motor power information includes a maximum allowable charging power P of the second motormec2Maximum allowable discharge power P of the second motormed2(ii) a The driving demand power information includes driving demand drive power PddDriving demand recovery power Pdc；
The power allocation calculation unit includes:
a second power acquisition unit for acquiring a discharge required power P other than the vehicle drivened1；
A first calculating unit for calculating the discharge demand power P based on a first power distribution modened1The currentCalculating a charging power distribution value P of the second motor according to the power information and the current driving demand informationD2And a discharge power distribution value PC2；
A third power obtaining unit for obtaining the actual charging power P of the second motorec1And the actual discharge power Ped1(ii) a And
a second calculation unit for calculating actual discharge power P of the second motor according to the current power information and the current driving demand informationed1And actual charging power Pec1Calculating a charging power distribution value P of the first electric machineC1And a discharge power distribution value PD1。
Optionally, the power allocation calculation unit includes:
a third calculating unit, configured to calculate a charging power distribution value P of the second motor according to the current power information and the current driving demand information based on a second power distribution mannerD2And a discharge power distribution value PC2；
A third power obtaining unit for obtaining the actual charging power P of the second motorec1And the actual discharge power Ped1(ii) a And
a second calculation unit for calculating actual discharge power P of the second motor according to the current power information and the current driving demand informationed1And actual charging power Pec1Calculating a charging power distribution value P of the first electric machineC1And a discharge power distribution value PD1。
Compared with the existing fixed proportion power distribution technology, the embodiment of the invention dynamically distributes the power of the high-voltage battery according to the current driving requirement and the actual consumption of the motor. If the two motors are operated in different states, such as one being driven and one being charged, they can fully utilize the discharge power and the charge power of the high-voltage battery without mutual influence. Sufficient power can be smoothly obtained when the working state of one motor is changed so as to meet the driving requirement.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of a hybrid configuration described in the background art.
Fig. 2 is a schematic flow chart of a method for distributing energy of a high-voltage battery of a hybrid vehicle according to an embodiment of the invention.
Fig. 3 is a schematic diagram of the discharge power distribution calculation of the second motor according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of the calculation of the charging power distribution of the second motor according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of the calculation of the discharge power distribution of the first motor according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of the calculation of the charging power distribution of the first motor according to an embodiment of the present invention.
Fig. 7 is a schematic diagram of a hybrid vehicle high-voltage battery power distribution system according to another embodiment of the invention.
Detailed Description
Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
In addition, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present invention. It will be understood by those skilled in the art that the present invention may be practiced without some of these specific details. In some instances, well known means have not been described in detail so as not to obscure the present invention.
Referring to fig. 1, an embodiment of the present invention provides a method for distributing energy of a high voltage battery of a hybrid vehicle, including the following steps:
an embodiment of the present invention proposes a hybrid vehicle high-voltage battery energy distribution method, which is applied to a hybrid vehicle equipped with a first motor and a second motor, and referring to fig. 1, the method includes the following steps S1 to S3:
step S1, obtaining current power information of the vehicle, wherein the current power information comprises current battery power information, accessory consumed power information, first motor power information, second motor power information and driving required power information;
specifically, the battery power information includes a battery allowable charging power PcAnd battery allowable discharge power Pd(ii) a The first motor power information includes a maximum allowable charging power P of the first motormec1Maximum permissible discharge power P of the first electric machinemed1(ii) a The second motor power information includes a maximum allowable charging power P of the second motormec2Maximum allowable discharge power P of the second motormed2(ii) a The driving demand power information includes driving demand drive power PddDriving demand recovery power Pdc(ii) a Power consumption P of the accessorya(ii) a For convenience of explanation, all power references herein are set to positive values, and the total discharge power allowed for use by both motors is Pd-PaTotal charging power allowed for both motors is Pc+Pa。
Wherein the current driving demand driving power PddAnd driving demand recovery power PdcIn a mutually exclusive relationship, when one of them is true (greater than 0), the other is zero.
Wherein the maximum allowable discharge power P of the first motormed1Maximum allowable charging power P of the second motormec2Maximum allowable discharge power P of the second motormed2The term "maximum charge/discharge power" means the maximum charge/discharge power that the first motor and the second motor can exert at their current rotational speeds.
Step S2, acquiring the discharge demand information of a second motor, and determining the current power distribution mode according to the discharge demand information of the second motor;
specifically, in the method of the present embodiment, the first motor is mainly driven, the second motor is mainly used for power generation, and two different power distribution modes are set according to the discharge requirement of the second motor.
And step S3, calculating the distribution values of the charging power and the discharging power of the first motor and the distribution values of the charging power and the discharging power of the second motor according to the current power information based on the current power distribution mode.
Embodiments of the present invention dynamically allocate power to the high voltage battery based on current driving demand and actual consumption of the motor. If the two motors are operated in different states, such as one being driven and one being charged, they can fully utilize the discharge power and the charge power of the high-voltage battery without mutual influence. Sufficient power can be smoothly obtained when the working state of one motor is changed so as to meet the driving requirement.
Specifically, the step S2 includes:
when the second motor has a discharge demand except for vehicle driving, determining that the current power distribution mode is a first power distribution mode;
and when the second motor has no discharging requirement except for vehicle driving, determining the current power distribution mode as the second power distribution mode.
Referring to fig. 3-6, the allocating based on the first power allocating manner in the step S3 includes steps S311 to 314:
step S311, obtaining the discharge demand power P except for the driving of the vehiclened1；
In particular, due to the second electricityThe machine mainly generates electricity, when the machine has discharge requirements except for vehicle driving, such as the need of starting or regulating the speed of the engine, the limit on the discharge power of the machine needs to be gradually released, and the required minimum driving power is Pned1。
Step S312, based on the first power distribution mode, according to the discharging demand power Pned1Calculating a charging power distribution value P of a second motor according to the current power information and the current driving demand informationD2And a discharge power distribution value PC2；
Wherein:
PD2＝min{Pmed2,((Pd-Pa)-min(Pdd,Pmed1)+Pned1+min(Pdc,Pmec1))}；
PC2＝min{Pmec2,((Pc+Pa)+min(Pdd,Pmed1)-min(Pdc,Pmec1))}；
specifically, based on the above-mentioned allocation calculation, i.e., the power limit for the second motor is released, since the discharge power limit of the first motor is calculated based on the actual execution power of the second motor, the discharge power limit of the first motor is also reduced when the second motor is driven (discharged).
It will be appreciated that the assigned values of the charging power and the discharging power of the first electric machine, and of the charging power and the discharging power of the second electric machine, should be limited finally by the respective maximum allowable charging power and maximum discharging power.
It should be noted that the discharge requirement (such as engine starting or speed regulation) of the second electric machine except for vehicle driving needs to be calibrated and adjusted according to different vehicles and hybrid systems.
Step S313, acquiring actual charging power P of the second motorec1And the actual discharge power Ped1；
Step S314, according to the current power information, the current driving demand information and the actual discharging power P of the second motored1And actual charging power Pec1Calculating a charging power distribution value P of the first electric machineC1And a discharge power distribution value PD1；
Wherein:
PD1＝min{Pmed1,((Pd-Pa)-Ped1+Pec1)}；
PC1＝min{Pmec1,((Pc+Pa)+Ped1-Pec1)}。
in which the second motor actually performs a discharge power Ped1And charging power Pec1And in a mutually exclusive relationship, when one of the relations is established, the other relation is zero.
Referring to fig. 3-6, the allocating based on the second power allocating method in step S3 includes steps S321 to 323:
step S321, based on a second power distribution mode, calculating a charging power distribution value P of a second motor according to the current power information and the current driving demand informationD2And a discharge power distribution value PC2；
Wherein:
PD2＝min{Pmed2,((Pd-Pa)-min(Pdd,Pmed1)+min(Pdc,Pmec1))}；
PC2＝min{Pmec2,((Pc+Pa)+min(Pdd,Pmed1)-min(Pdc,Pmec1))}；
step S322, acquiring actual charging power P of the second motorec1And the actual discharge power Ped1；
Step S323, according to the current power information, the current driving demand information and the actual discharging power P of the second motored1And actual charging power Pec1Calculating a charging power distribution value P of the first electric machineC1And a discharge power distribution value PD1；
Wherein:
PD1＝min{Pmed1,((Pd-Pa)-Ped1+Pec1)}；
PC1＝min{Pmec1,((Pc+Pa)+Ped1-Pec1)}。
the following describes the distribution calculation process of the method of the present embodiment in detail with reference to an example parameter, such as the current battery allowable discharge power P of the vehicledAt 100kw, the battery allows a charging power PcAt 90kw, the accessory consumes power Pa10kw, the maximum discharge power P allowed for the first electrical machinemed170kw, the maximum charging power P allowed for the first electric machinemec1At 65kw, the maximum discharge power P allowed for the second machinemed250kw, the maximum charging power P allowed for the second electrical machinemec2At 45kw, the power allocation is described below according to different operating modes, wherein the first operating mode corresponds to a first power allocation mode, and the second, third, and fourth operating modes correspond to a second power allocation mode:
a first working mode, when the vehicle enters into a drivable mode, the driver steps on the accelerator pedal, namely the current driver has a driving power demand, and the driving power demand P of the current driver is assumedddAt 60kw, the recuperation power requirement PdcIs 0 kw. According to the battery power distribution method, if the second electric machine has a discharge demand (requiring engine speed regulation, P is expected to be used) other than the vehicle drivened1At 15kw power) and actually performs the generated power Pec1At 0kw, a discharge power P is actually performeded1At 15kw, the permissible discharge power distribution for the second electric machine is min [50, (100-10) - (min (70,60) -15) + min (65,0)]45kw, the permissible charging power allocation for the second electric machine min [45, (90+10) + min (70,60) -min (65,0)]45kw, the permissible discharge power allocation for the first electric machine is min [70, (100-10) -15+0]70kw, the permissible charging power allocation for the first electric machine is min [65 (90+10) +15-0]＝65kw。
A second working mode, when the vehicle enters into the drivable mode, the driver steps on the accelerator pedal, that is, the current driver has the driving power demand, and the driving power demand P of the current driver is assumedddAt 60kw, the recuperation power requirement PdcIs 0 kw. According to the battery power distribution method, if the secondThe motor has no discharge demand and is currently in a power generation state, namely, the actual execution power Pec1At 30kw, a discharge power P is actually performeded1At 0kw, the permissible discharge power distribution for the second electric machine is min [50, (100-10) -min (70,60) + min (65,0)]30kw, the permissible charging power allocation for the second electric machine min [45, (90+10) + min (70,60) -min (65,0)]45kw, the permissible discharge power allocation for the first electric machine is min [70, (100-10) -0+30]70kw, the permissible charging power allocation for the first electric machine is min [65 (90+10) +0 to 30]＝65kw。
In the third working mode, when the vehicle is running, the driver presses the brake pedal, namely the current driver has the recovery power demand, and the driving power demand P of the current driver is assumedddAt 0kw, the recovered power requirement PdcIs 5 kw. According to the battery power distribution method, if the second motor has no discharge demand and is currently in the power generation state, the generated power P is actually performedec1At 30kw, a discharge power P is actually performeded10kw, the permitted discharge power of the second electrical machine is min [50, (100-10) -min (70,0) + min (65,5)]50kw, the permissible charging power for the second electric machine min [45, (90+10) + min (70,0) -min (65,5)]45kw, the permissible discharge power of the first electric machine is min [70, (100-10) -0+30]70kw, the permissible charging power of the first electric machine min [65, (90+10) +0-30]＝65kw。
A fourth working mode, when the vehicle enters into the drivable mode, the driver presses the accelerator pedal, that is, the current driver has the driving power demand, and the driving power demand P of the current driver is assumedddAt 85kw, the recuperation power requirement PdcIs 0 kw. According to the battery power distribution method, if the second motor needs to participate in driving (since the first motor cannot satisfy all driving demands), the generated power P is actually performedec1At 0kw, a discharge power P is actually performeded115kw, the permissible discharge power of the second electrical machine is min [50, (100-10) -min (70,85) + min (65,0)]20kw, the permissible charging power for the second electric machine min [45, (90+10) + min (70,85) -min (65,0)]45kw, the permissible discharge power of the first electric machine is min [70, (100-10) -15+0]70kw, the permissible charging power of the first electric machine min [65, (90+10) +15-0]＝65kw。
Another embodiment of the present invention also provides a high-voltage battery energy distribution system for a hybrid vehicle, the hybrid vehicle being provided with a first electric machine and a second electric machine, the system corresponding to the method of the previous embodiment, with reference to fig. 6, the system comprising:
the power control device comprises a first power obtaining unit 1, a second power obtaining unit and a control unit, wherein the first power obtaining unit is used for obtaining current power information of a vehicle, and the current power information comprises current battery power information, accessory consumed power information, first motor power information, second motor power information and driving required power information;
the distribution mode determining unit 2 is used for acquiring the discharge demand information of the second motor and determining the current power distribution mode according to the discharge demand information of the second motor; and
and the power distribution calculation unit 3 is configured to calculate, based on the current power distribution manner, a distribution value of the charging power and the discharging power of the first motor and a distribution value of the charging power and the discharging power of the second motor according to the current power information.
Optionally, the allocation manner determining unit 2 is specifically configured to:
when the second motor has a discharge demand except for vehicle driving, determining that the current power distribution mode is a first power distribution mode; and when the second motor has no discharging requirement except for vehicle driving, determining the current power distribution mode as the second power distribution mode.
Optionally, the battery power information includes a battery allowable charging power PcAnd battery allowable discharge power Pd(ii) a The first motor power information includes a maximum allowable charging power P of the first motormec1Maximum permissible discharge power P of the first electric machinemed1(ii) a The second motor power information includes a maximum allowable charging power P of the second motormec2Maximum allowable discharge power P of the second motormed2(ii) a The driving demand power information includes driving demand drive power PddDriving demand recovery power Pdc；
The power allocation calculation unit 3 includes:
a second power acquisition unit 31 for acquiring the discharge demand power P in addition to the vehicle drivened1；
A first calculating unit 32, configured to, based on a first power distribution manner, calculate the discharge demand power P according to the discharge demand powerned1Calculating a charging power distribution value P of a second motor according to the current power information and the current driving demand informationD2And a discharge power distribution value PC2；
A third power obtaining unit 33 for obtaining an actual charging power P of the second motorec1And the actual discharge power Ped1；
A second calculating unit 34 for calculating actual discharge power P of the second motor according to the current power information and the current driving demand informationed1And actual charging power Pec1Calculating a charging power distribution value P of the first electric machineC1And a discharge power distribution value PD1(ii) a And
a third calculating unit 35, configured to calculate a charging power distribution value P of the second motor according to the current power information and the current driving demand information based on a second power distribution modeD2And a discharge power distribution value PC2。
The above-described system embodiments are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
It should be noted that the battery energy distribution system described in the foregoing embodiment corresponds to the battery energy distribution method described in the foregoing embodiment, and therefore, portions of the battery energy distribution system described in the foregoing embodiment that are not described in detail can be obtained by referring to the content of the battery energy distribution method described in the foregoing embodiment, and details are not described here.
Also, the battery power distribution system according to the above-described embodiment, if implemented in the form of a software functional unit and sold or used as a separate product, may be stored in a computer-readable storage medium.
Specifically, the computer-readable storage medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (10)

1. A high-voltage battery energy distribution method for a hybrid vehicle equipped with a first electric machine and a second electric machine, characterized by comprising:
acquiring current power information of a vehicle, wherein the current power information comprises current battery power information, accessory consumed power information, first motor power information, second motor power information and driving required power information;
acquiring the discharge demand information of a second motor, and determining the current power distribution mode according to the discharge demand information of the second motor;
and calculating the distribution value of the charging power and the discharging power of the first motor and the distribution value of the charging power and the discharging power of the second motor according to the current power information based on the current power distribution mode.
2. The hybrid vehicle high-voltage battery energy distribution method according to claim 1, wherein determining the current power distribution manner according to the discharge demand information of the second motor includes:
when the second motor has a discharge demand except for vehicle driving, determining that the current power distribution mode is a first power distribution mode;
and when the second motor has no discharging requirement except for vehicle driving, determining the current power distribution mode as the second power distribution mode.
3. The hybrid vehicle high voltage battery energy distribution method of claim 2, characterized in that the battery power information includes a battery allowable charging power PcAnd battery allowable discharge power Pd(ii) a The first motor power information includes a maximum allowable charging power P of the first motormec1Maximum permissible discharge power P of the first electric machinemed1(ii) a The second motor power information includes a maximum allowable charging power P of the second motormec2Maximum allowable discharge power P of the second motormed2(ii) a The driving demand power information includes driving demand drive power PddDriving demand recovery power Pdc；
Wherein, the calculating the distribution value of the charging power and the discharging power of the first motor and the distribution value of the charging power and the discharging power of the second motor according to the current power information based on the current power distribution mode comprises:
obtaining the discharge demand power P in addition to the vehicle drivened1；
Based on the first power distribution mode, according to the discharge demand power Pned1Calculating a charging power distribution value P of a second motor according to the current power information and the current driving demand informationD2And a discharge power distribution value PC2；
Obtaining actual charging power P of the second motorec1And the actual discharge power Ped1And according to the current power information, the current driving demand information and the actual discharge power P of the second motored1And actual charging power Pec1Calculating a charging power distribution value P of the first electric machineC1And a discharge power distribution value PD1。
4. The hybrid vehicle high-voltage battery energy distribution method according to claim 3, wherein:
PD2＝min{Pmed2,((Pd-Pa)-min(Pdd,Pmed1)+Pned1+min(Pdc,Pmec1))}；
PC2＝min{Pmec2,((Pc+Pa)+min(Pdd,Pmed1)-min(Pdc,Pmec1))}；
PD1＝min{Pmed1,((Pd-Pa)-Ped1+Pec1)}；
PC1＝min{Pmec1,((Pc+Pa)+Ped1-Pec1)}；
Paconsuming power for the accessory.
5. The hybrid vehicle high-voltage battery energy distribution method according to claim 2, wherein the calculating, based on the current power distribution manner, distribution values of the charging power and the discharging power of the first electric machine and distribution values of the charging power and the discharging power of the second electric machine from the current power information includes:
calculating a charging power distribution value P of a second motor according to the current power information and the current driving demand information based on a second power distribution modeD2And a discharge power distribution value PC2；
Obtaining actual charging power P of the second motorec1And the actual discharge power Ped1And according to the current power information, the current driving demand information and the actual discharge power P of the second motored1And actual charging power Pec1Calculating a charging power distribution value P of the first electric machineC1And the distribution value of discharge powerPD1。
6. The hybrid vehicle high-voltage battery energy distribution method according to claim 5, wherein:
PD2＝min{Pmed2,((Pd-Pa)-min(Pdd,Pmed1)+min(Pdc,Pmec1))}；
PC2＝min{Pmec2,((Pc+Pa)+min(Pdd,Pmed1)-min(Pdc,Pmec1))}；
PD1＝min{Pmed1,((Pd-Pa)-Ped1+Pec1)}；
PC1＝min{Pmec1,((Pc+Pa)+Ped1-Pec1)}。
7. a high-voltage battery energy distribution system for a hybrid vehicle configured with a first electric machine and a second electric machine, the system comprising:
the system comprises a first power acquisition unit, a second power acquisition unit and a control unit, wherein the first power acquisition unit is used for acquiring current power information of a vehicle, and the current power information comprises current battery power information, accessory consumed power information, first motor power information, second motor power information and driving required power information;
the distribution mode determining unit is used for acquiring the discharge demand information of the second motor and determining the current power distribution mode according to the discharge demand information of the second motor; and
and the power distribution calculation unit is used for calculating the distribution values of the charging power and the discharging power of the first motor and the distribution values of the charging power and the discharging power of the second motor according to the current power information based on the current power distribution mode.
8. The hybrid vehicle high voltage battery energy distribution system of claim 7, wherein the distribution manner determination unit is specifically configured to:
when the second motor has a discharge demand except for vehicle driving, determining that the current power distribution mode is a first power distribution mode; and when the second motor has no discharging requirement except for vehicle driving, determining the current power distribution mode as the second power distribution mode.
9. The hybrid vehicle high voltage battery energy distribution method of claim 8, wherein the battery power information includes a battery allowable charging power PcAnd battery allowable discharge power Pd(ii) a The first motor power information includes a maximum allowable charging power P of the first motormec1Maximum permissible discharge power P of the first electric machinemed1(ii) a The second motor power information includes a maximum allowable charging power P of the second motormec2Maximum allowable discharge power P of the second motormed2(ii) a The driving demand power information includes driving demand drive power PddDriving demand recovery power Pdc；
The power allocation calculation unit includes:
a second power acquisition unit for acquiring a discharge required power P other than the vehicle drivened1；
A first calculating unit for calculating the discharge demand power P based on a first power distribution modened1Calculating a charging power distribution value P of a second motor according to the current power information and the current driving demand informationD2And a discharge power distribution value PC2；
A third power obtaining unit for obtaining the actual charging power P of the second motorec1And the actual discharge power Ped1(ii) a And
a second calculation unit for calculating actual discharge power P of the second motor according to the current power information and the current driving demand informationed1And actual charging power Pec1Calculating a charging power distribution value P of the first electric machineC1And a discharge power distribution value PD1。
10. The hybrid vehicle high voltage battery energy distribution system of claim 8, wherein the power distribution calculation unit includes:
a third calculating unit, configured to calculate a charging power distribution value P of the second motor according to the current power information and the current driving demand information based on a second power distribution mannerD2And a discharge power distribution value PC2；
A third power obtaining unit for obtaining the actual charging power P of the second motorec1And the actual discharge power Ped1(ii) a And
a second calculation unit for calculating actual discharge power P of the second motor according to the current power information and the current driving demand informationed1And actual charging power Pec1Calculating a charging power distribution value P of the first electric machineC1And a discharge power distribution value PD1。
CN202010729409.2A 2020-07-27 2020-07-27 Energy distribution method and system for high-voltage battery of hybrid vehicle Active CN111942366B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010729409.2A CN111942366B (en) 2020-07-27 2020-07-27 Energy distribution method and system for high-voltage battery of hybrid vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010729409.2A CN111942366B (en) 2020-07-27 2020-07-27 Energy distribution method and system for high-voltage battery of hybrid vehicle

Publications (2)

Publication Number Publication Date
CN111942366A true CN111942366A (en) 2020-11-17
CN111942366B CN111942366B (en) 2021-12-21

Family

ID=73338139

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010729409.2A Active CN111942366B (en) 2020-07-27 2020-07-27 Energy distribution method and system for high-voltage battery of hybrid vehicle

Country Status (1)

Country Link
CN (1) CN111942366B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112699551A (en) * 2020-12-28 2021-04-23 长城汽车股份有限公司 High-voltage battery charging method and device, storage medium and electronic equipment

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014102576A2 (en) * 2012-12-26 2014-07-03 Toyota Jidosha Kabushiki Kaisha Control system for hybrid vehicle
GB201609680D0 (en) * 2016-06-02 2016-07-20 Charge R&D Ltd Electric vehicle battery management apparatus and method
CN106740815A (en) * 2017-01-03 2017-05-31 重庆长安汽车股份有限公司 Mixed electrical automobile dynamical system, motor discharge capability evaluation method and estimation control device
CN107972498A (en) * 2016-10-21 2018-05-01 蔚来汽车有限公司 Power distribution method and system for electric vehicle
CN110696806A (en) * 2019-09-29 2020-01-17 一汽解放青岛汽车有限公司 Power distribution control method for hybrid electric vehicle
CN111216705A (en) * 2020-01-13 2020-06-02 清华大学 Energy management method of series hybrid power system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014102576A2 (en) * 2012-12-26 2014-07-03 Toyota Jidosha Kabushiki Kaisha Control system for hybrid vehicle
GB201609680D0 (en) * 2016-06-02 2016-07-20 Charge R&D Ltd Electric vehicle battery management apparatus and method
CN107972498A (en) * 2016-10-21 2018-05-01 蔚来汽车有限公司 Power distribution method and system for electric vehicle
CN106740815A (en) * 2017-01-03 2017-05-31 重庆长安汽车股份有限公司 Mixed electrical automobile dynamical system, motor discharge capability evaluation method and estimation control device
CN110696806A (en) * 2019-09-29 2020-01-17 一汽解放青岛汽车有限公司 Power distribution control method for hybrid electric vehicle
CN111216705A (en) * 2020-01-13 2020-06-02 清华大学 Energy management method of series hybrid power system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112699551A (en) * 2020-12-28 2021-04-23 长城汽车股份有限公司 High-voltage battery charging method and device, storage medium and electronic equipment

Also Published As

Publication number Publication date
CN111942366B (en) 2021-12-21

Similar Documents

Publication Publication Date Title
CN110315976B (en) Vehicle power supply system
CN108656957A (en) Regenerating brake control method and device
CN105599617A (en) Braking force control system, vehicle and method of controlling braking force
CN101378927A (en) Control apparatus and control method for vehicle
CN108638874A (en) A kind of energy storage management system based on extended-range vehicle
US8872470B2 (en) Electric drive vehicle
CN110576755A (en) Hydrogen energy automobile fuel cell energy management system based on auxiliary energy system
CN111469715A (en) Control method based on fuel cell automobile energy distribution
CN111942366B (en) Energy distribution method and system for high-voltage battery of hybrid vehicle
US6958587B1 (en) Torque distribution for multiple propulsion system vehicles
JP2003333707A (en) Electric automobile
CN112498125B (en) Four-wheel drive power control system, method and storage medium
CN111409466B (en) Vehicle braking method and device, vehicle, electronic device and storage medium
CN114590131B (en) Braking energy recovery control method and device and vehicle
WO2023000145A1 (en) Method and system for controlling drive of hybrid electric vehicle
CN113232525B (en) Control method of four-wheel drive electric vehicle and computer readable storage medium
CN115972921A (en) Distributed drive torque distribution method, device, equipment and medium
CN114394083A (en) Hybrid electric vehicle torque distribution method and system
CN111196167B (en) Vehicle power control method and device and electric vehicle
CN113859220A (en) Vehicle torque distribution method, vehicle, and storage medium
JP2016144366A (en) Electric vehicle
CN114347856B (en) Control method and device for vehicle, vehicle and storage medium
CN116901964A (en) Braking energy recovery control method and device, storage medium and vehicle
CN117901658A (en) Vehicle control method, device, terminal equipment and readable storage medium
CN115042769A (en) Method and system for calculating discharge torque and discharge torque of motor of double-motor vehicle

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant