CN109795469A - A kind of battery charging and discharging current control method, system and vehicle - Google Patents
A kind of battery charging and discharging current control method, system and vehicle Download PDFInfo
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- CN109795469A CN109795469A CN201711148854.4A CN201711148854A CN109795469A CN 109795469 A CN109795469 A CN 109795469A CN 201711148854 A CN201711148854 A CN 201711148854A CN 109795469 A CN109795469 A CN 109795469A
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Abstract
The present invention provides a kind of battery charging and discharging current control method, system and vehicles, acquire the charging current and discharge current of present battery, judge the charging current of present battery and the size relation of discharge current current threshold corresponding with setting, if the charging current and discharge current of present battery are greater than the corresponding current threshold upper limit of setting, direct torque is carried out to engine, revolving speed control is carried out to motor；If the charging current and discharge current of present battery are less than the corresponding current threshold lower limit of setting, revolving speed control is carried out to engine, direct torque is carried out to motor.Pass through effective use torque rotary speed control, it is ensured that battery current is no more than the threshold value of setting, and the accurate charging and discharging currents for controlling battery ensure that the service life of battery, making battery not influences the performance of vehicle.
Description
Technical field
The invention belongs to technical field of hybrid power, in particular to a kind of battery charging and discharging current control method, system and
Vehicle.
Background technique
With the continuous development of battery technology, application field is constantly expanded, including hybrid vehicle, personal consumption electricity
Subclass product, new-energy automobile, communication system backup power supply etc..Battery has memory-less effect, energy density height, circulation longevity
Many advantages, such as life is long, power density is big, environment friendly and pollution-free.
The performance quality of battery is very crucial to the protection of battery, directly affects the reliability and service life of vehicle,
Vehicle should meet working condition requirement in the process of running, while meet the requirement of battery in real time again, realize the protection to battery,
Extend battery life.Currently, there is the case where battery current is beyond limit value in hybrid vehicle in use, especially exist
Extremely frigid zones, battery charging and discharging current limit is smaller when temperature is low, and engine power is larger, under some operating conditions such as power generation,
Battery charge is easy to be limited, to influence the service life；And at present vehicle can not real-time ensuring battery charging and discharging currents
Without departing from battery request, the service life of battery also will affect, therefore, realize that the real-time guard of battery becomes urgent problem to be solved.
Summary of the invention
The purpose of the present invention is to provide a kind of battery charging and discharging current control method, system and vehicles, existing for solving
There is the charge and discharge of battery in technology unreasonable the problem of causing cell damage.
To achieve the above object, the technical scheme is that
A kind of battery charging and discharging current control method, includes the following steps:
Acquire present battery charging current and discharge current, judge present battery charging current and discharge current with set
The size relation of fixed corresponding current threshold, if the charging current of present battery and discharge current are greater than the corresponding electricity of setting
When flowing upper threshold, direct torque is carried out to engine, revolving speed control is carried out to motor；If the charging current of present battery and putting
Electric current is less than the corresponding current threshold lower limit of setting, carries out revolving speed control to engine, carries out direct torque to motor.
Further, when engine speed increases to setting value, increase Motor torque.
Further, after carrying out revolving speed control to engine and carrying out direct torque to motor, if the charging of present battery
Electric current and discharge current still exceed the corresponding current threshold of setting, then detect present battery charging current and discharge current setting
Corresponding current limit relationship, if detect battery charge be greater than setting charging current limit value or discharge current
Less than the limit value of the discharge current of setting, then the limit value that the charging current value of present battery is subtracted to the charging current of setting obtains
First difference, or the limit value that the discharge current value of present battery subtracts the discharge current of setting is obtained into the second difference, if described
The absolute value of first difference or the absolute value of the second difference are greater than the current threshold of setting, then reduce engine revolving speed and/or
The torque of motor, charging and discharging currents limit value are demarcated according to battery temperature and battery charge state value.
It is described to adopt the present invention also provides a kind of battery charging and discharging current control system, including controller and acquisition device
Acquisition means are used to acquire the charging current and discharge current of present battery, and the controller is used to judge the charging electricity of present battery
The size relation of stream and discharge current current threshold corresponding with setting, if the charging current of present battery and discharge current are big
When the corresponding current threshold upper limit of setting, direct torque is carried out to engine, revolving speed control is carried out to motor；If current electricity
The charging current and discharge current in pond are less than the corresponding current threshold lower limit of setting, revolving speed control are carried out to engine, to electricity
Machine carries out direct torque.
Further, when engine speed increases to setting value, increase Motor torque.
Further, after carrying out revolving speed control to engine and carrying out direct torque to motor, if the charging of present battery
Electric current and discharge current still exceed the corresponding current threshold of setting, then detect present battery charging current and discharge current setting
Corresponding current limit relationship, if detect battery charge be greater than setting charging current limit value or discharge current
Less than the limit value of the discharge current of setting, then the limit value that the charging current value of present battery is subtracted to the charging current of setting obtains
First difference, or the limit value that the discharge current value of present battery subtracts the discharge current of setting is obtained into the second difference, if described
The absolute value of first difference or the absolute value of the second difference are greater than the current threshold of setting, then reduce engine revolving speed and/or
The torque of motor, charging and discharging currents limit value are demarcated according to battery temperature and battery charge state value.
The present invention also provides a kind of vehicle, including engine, motor, battery and power output shaft, the battery and institute
Motor connection is stated, it further includes battery charge and discharge that the engine, motor are connected on power output shaft by planet carrier and sun gear
Electric current control system, the system comprises controller and acquisition device, the acquisition device is for acquiring filling for present battery
Electric current and discharge current, the controller is for judging that the charging current of present battery and discharge current are corresponding with setting
The size relation of current threshold, if the charging current of present battery and discharge current are greater than the corresponding current threshold upper limit of setting
When, direct torque is carried out to engine, revolving speed control is carried out to motor；If the charging current and discharge current of present battery are less than
The corresponding current threshold lower limit of setting, carries out revolving speed control to engine, carries out direct torque to motor.
Further, when engine speed increases to setting value, increase Motor torque.
Further, after carrying out revolving speed control to engine and carrying out direct torque to motor, if the charging of present battery
Electric current and discharge current still exceed the corresponding current threshold of setting, then detect present battery charging current and discharge current setting
Corresponding current limit relationship, if detect battery charge be greater than setting charging current limit value or discharge current
Less than the limit value of the discharge current of setting, then the limit value that the charging current value of present battery is subtracted to the charging current of setting obtains
First difference, or the limit value that the discharge current value of present battery subtracts the discharge current of setting is obtained into the second difference, if described
The absolute value of first difference or the absolute value of the second difference are greater than the current threshold of setting, then reduce engine revolving speed and/or
The torque of motor, charging and discharging currents limit value are demarcated according to battery temperature and battery charge state value.
The beneficial effects of the present invention are:
Battery charging and discharging current control method of the invention, acquires the electric current of present battery, judge present battery electric current with
The size relation of the corresponding current threshold value of setting, according to the relationship of present battery electric current and the current threshold of setting to engine and
Motor carries out revolving speed, direct torque, passes through effective use torque rotary speed control, it is ensured that and battery current is no more than the threshold value of setting,
The charging and discharging currents of accurate control battery, ensure that the service life of battery, making battery not influences the performance of vehicle.
Detailed description of the invention
Fig. 1 is the structural block diagram of vehicle dynamical system configuration；
Fig. 2 is battery charging and discharging current control method flow chart.
Specific embodiment
A specific embodiment of the invention is further described with reference to the accompanying drawing:
The present invention provides a kind of vehicles, as shown in Figure 1, including vehicle dynamical system configuration, vehicle dynamical system structure
Type includes engine 1, torsional vibration damper 2, first motor 3, sun gear 4, PG1 gear ring 5, PG2 gear ring 6, the second motor 7, PG1 row
Carrier 8, PG2 planet carrier 9, PG2 sun gear 10, power output shaft 11；Between motor and engine by planet carrier, sun gear with
Power output axis connection further includes having battery, and battery is connected to motor, and battery provides drive force electricity by electric discharge for motor
Machine rotation；The vehicle further includes having battery charging and discharging current control system, which includes controller and acquisition device, is somebody's turn to do
Controller is entire car controller, and acquisition device is battery management system, and as other embodiments, controller and acquisition device can
Using other equipment.Wherein, battery management system is used to acquire the electric current of battery, judges present battery electric current and setting
The size relation of current threshold, wherein the current threshold set is the control parameter of entire car controller, vehicle control as calibration value
Device processed is used to carry out rotational speed and torque control to engine and motor according to the relationship of present battery electric current and the current threshold of setting.
The working principle of the vehicle dynamical system configuration of the present embodiment illustrates by taking battery discharge as an example, battery discharge procedure
In, with the increase of battery discharge current, driving force also becoming larger slowly, when battery discharge current reaches certain value, motor
Excessive driving force can be generated, in order not to cause the damage of motor, it should reduce driving force, motor is made to be in revolving speed control mould
Formula, but in order to keep the balance of the entire driving force of system, need to increase the drive of engine while reducing motor driving force
The driving force of power, engine is increased by increasing the torque of engine.
Battery charging and discharging current control method provided in this embodiment, specifically includes the following steps:
1, battery management system acquires battery current flow, and by the current discharge current of the battery of acquisition or charging current
It is sent to entire car controller, entire car controller receives the discharge current or charging current value that battery management system is sent, to reception
Discharge current or charging current and the current threshold of setting judged, if the charging current of present battery and discharge current
Greater than setting the corresponding current threshold upper limit when, vehicle control unit controls engine carry out direct torque, control motor carry out
The characteristics of revolving speed control, performance engine quick response torque command and motor quick response rotary speed instruction.
If 2, the charging current of present battery and discharge current are less than the corresponding current threshold lower limit of setting, full-vehicle control
Device changes the control mode to engine and motor, and control engine carries out revolving speed control, and control motor carries out direct torque, hair
Motivation sends rotating speed of target instruction, and motor sends target torque instruction, realizes that control of engine speed drives vehicle driving, into one
Step realizes that vehicle by setting power output, can effectively avoid battery transient changing amount；According to system configuration feature, engine
Revolving speed and speed decouple, and can arbitrarily control engine speed and motor torque in the reasonable scope；It is driven using engine speed
Vehicle driving effectively reduces current fluctuation.
3, with the increase of demand power, when engine speed increases to setting value, make demand by increasing Motor torque
Power increases.
4, after carrying out revolving speed control to engine and carrying out direct torque to motor, if the charging current of present battery and putting
Electric current still exceeds the corresponding current threshold of setting, then detect present battery charging current and discharge current setting it is corresponding
The relationship of current limit, if detecting, battery charge is greater than the limit value of the charging current of setting or electric less than the electric discharge of setting
The limit value of stream, then the limit value that the charging current value of present battery is subtracted to the charging current of setting obtains the first difference, or will work as
The limit value that the discharge current value of preceding battery subtracts the discharge current of setting obtains the second difference, if the absolute value of the first difference or
The absolute value of two differences is greater than the current threshold of setting, then reduces the torque of the revolving speed and/or motor of engine, that is, pass through closed loop
Control decay to current control instruction value, thus effectively control battery charging and discharging current value, specifically, as shown in Fig. 2, its
In, charging and discharging currents limit value is respectively the limit value of the charging current limit value of battery and the discharge current of battery, according to battery temperature
And battery charge state value calibration.
The present invention also provides a kind of battery charging and discharging current control system, which includes controller and acquisition device,
Acquisition device is used to acquire the charging current and discharge current of present battery, and controller is used to judge the charging current of present battery
The size relation of current threshold corresponding with setting, if the charging current of present battery is in pair for being greater than setting with discharge current
When the current threshold upper limit answered, direct torque is carried out to engine, revolving speed control is carried out to motor；If the charging electricity of present battery
Stream and discharge current are less than the corresponding current threshold lower limit of setting, carry out revolving speed control to engine, carry out torque to motor
Control, otherwise normal output.Since the specific embodiment of the system has been described in detail in the above-described embodiments,
Therefore, it repeats no more herein.
Specific embodiment is presented above, but the present invention is not limited to embodiment described above.The present invention
Basic ideas be above-mentioned basic scheme, for those of ordinary skill in the art, introduction according to the present invention is designed each
The model of kind deformation, formula, parameter do not need to spend creative work.The case where not departing from the principle and spirit of the invention
Under to embodiment carry out change, modification, replacement and modification still fall in protection scope of the present invention.
Claims (9)
1. a kind of battery charging and discharging current control method, which comprises the steps of:
The charging current and discharge current that acquire present battery judges the charging current and discharge current and setting of present battery
The size relation of corresponding current threshold, if the charging current of present battery and discharge current are greater than the corresponding current threshold of setting
When being worth the upper limit, direct torque is carried out to engine, revolving speed control is carried out to motor；If the charging current of present battery and electric discharge electricity
Stream is less than the corresponding current threshold lower limit of setting, carries out revolving speed control to engine, carries out direct torque to motor.
2. battery charging and discharging current control method according to claim 1, which is characterized in that when engine speed increases to
When setting value, increase Motor torque.
3. battery charging and discharging current control method according to claim 1 or 2, which is characterized in that turn to engine
After speed controls and carries out direct torque to motor, if the charging current of present battery and discharge current still exceed the corresponding of setting
Current threshold then detects the relationship of the corresponding current limit of present battery charging current and discharge current setting, if detecting
The limit value or discharge current that battery charge is greater than the charging current of setting will then work as less than the limit value of the discharge current of setting
The limit value that the charging current value of preceding battery subtracts the charging current of setting obtains the first difference, or by the discharge current of present battery
The limit value that value subtracts the discharge current of setting obtains the second difference, if the absolute value of first difference or the second difference is absolute
Value is greater than the current threshold of setting, then reduces the torque of the revolving speed and/or motor of engine, charging and discharging currents limit value is according to battery
Temperature and the calibration of battery charge state value.
4. a kind of battery charging and discharging current control system, which is characterized in that including controller and acquisition device, the acquisition device
For acquiring the charging current and discharge current of present battery, the controller is used to judge the charging current of present battery and puts
The size relation of electric current current threshold corresponding with setting, if the charging current of present battery and discharge current are greater than setting
The corresponding current threshold upper limit when, to engine carry out direct torque, to motor carry out revolving speed control；If present battery fills
Electric current and discharge current are less than the corresponding current threshold lower limit of setting, carry out revolving speed control to engine, carry out to motor
Direct torque.
5. battery charging and discharging current control system according to claim 4, which is characterized in that when engine speed increases to
When setting value, increase Motor torque.
6. battery charging and discharging current control system according to claim 4 or 5, which is characterized in that turn to engine
After speed controls and carries out direct torque to motor, if the charging current of present battery and discharge current still exceed the corresponding of setting
Current threshold then detects the relationship of the corresponding current limit of present battery charging current and discharge current setting, if detecting
The limit value or discharge current that battery charge is greater than the charging current of setting will then work as less than the limit value of the discharge current of setting
The limit value that the charging current value of preceding battery subtracts the charging current of setting obtains the first difference, or by the discharge current of present battery
The limit value that value subtracts the discharge current of setting obtains the second difference, if the absolute value of first difference or the second difference is absolute
Value is greater than the current threshold of setting, then reduces the torque of the revolving speed and/or motor of engine, charging and discharging currents limit value is according to battery
Temperature and the calibration of battery charge state value.
7. a kind of vehicle, including engine, motor, battery and power output shaft, the battery are connect with the motor, the hair
Motivation, motor are connected on power output shaft by planet carrier and sun gear, which is characterized in that further include battery charging and discharging electric current
Control system, the system comprises controller and acquisition device, the acquisition device is used to acquire the charging current of present battery
And discharge current, the controller is for judging the charging current of present battery and discharge current current threshold corresponding with setting
The size relation of value is right if the charging current of present battery and discharge current are greater than the corresponding current threshold upper limit of setting
Engine carries out direct torque, carries out revolving speed control to motor；If the charging current and discharge current of present battery are less than setting
Corresponding current threshold lower limit, to engine carry out revolving speed control, to motor carry out direct torque.
8. vehicle according to claim 7, which is characterized in that when engine speed increases to setting value, increase motor
Torque.
9. vehicle according to claim 7 or 8, which is characterized in that carry out revolving speed control to engine and carried out to motor
After direct torque, if the charging current of present battery and discharge current still exceed the corresponding current threshold of setting, detection is worked as
The relationship of preceding battery charge and the corresponding current limit of discharge current setting is set if detecting that battery charge is greater than
The limit value or discharge current of fixed charging current are less than the limit value of the discharge current of setting, then by the charging current value of present battery
The limit value for subtracting the charging current of setting obtains the first difference, or the discharge current value of present battery is subtracted to the electric discharge electricity of setting
The limit value of stream obtains the second difference, if the absolute value of first difference or the absolute value of the second difference are greater than the current threshold of setting
Value, then reduce the torque of the revolving speed and/or motor of engine, charging and discharging currents limit value is according to battery temperature and battery charge state
Value calibration.
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| CN201711148854.4A CN109795469A (en) | 2017-11-17 | 2017-11-17 | A kind of battery charging and discharging current control method, system and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711148854.4A CN109795469A (en) | 2017-11-17 | 2017-11-17 | A kind of battery charging and discharging current control method, system and vehicle |
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| CN111169459A (en) * | 2019-10-11 | 2020-05-19 | 中国第一汽车股份有限公司 | Hybrid vehicle creep control method and device, vehicle and storage medium |
| CN111890908A (en) * | 2020-08-12 | 2020-11-06 | 湖南道依茨动力有限公司 | Vehicle vibration damping system, vehicle and vehicle vibration damping method |
| CN112350417A (en) * | 2020-02-20 | 2021-02-09 | 长城汽车股份有限公司 | Voltage control method and device of motor |
| CN112793468A (en) * | 2020-12-31 | 2021-05-14 | 江铃汽车股份有限公司 | Battery charging and discharging protection method, system, storage medium and equipment |
| CN113415174A (en) * | 2021-06-25 | 2021-09-21 | 北京航天发射技术研究所 | Bus current limiting control method and related device for vehicle motor controller |
| CN114506245A (en) * | 2022-04-11 | 2022-05-17 | 山西维度空间信息科技有限公司 | Power battery charging and discharging management method and device, electronic equipment and medium |
| CN115663955A (en) * | 2022-10-31 | 2023-01-31 | 成都赛力斯科技有限公司 | Control method, system and equipment for battery charging |
| CN117048425A (en) * | 2023-10-11 | 2023-11-14 | 凡己科技(苏州）有限公司 | Vehicle control method and device and vehicle power system |
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| CN117048425A (en) * | 2023-10-11 | 2023-11-14 | 凡己科技(苏州）有限公司 | Vehicle control method and device and vehicle power system |
| CN117048425B (en) * | 2023-10-11 | 2024-02-02 | 凡己科技(苏州）有限公司 | Vehicle control method and device and vehicle power system |
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Application publication date: 20190524 |
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