CN104943553B - Vehicle power battery SOC value reporting method and device and battery management system - Google Patents
Vehicle power battery SOC value reporting method and device and battery management system Download PDFInfo
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Abstract
The invention provides a vehicle power battery SOC value reporting method and device and a battery management system. The method comprises the steps that firstly, an SOC value B of a power battery at the current moment is estimated; secondly, the difference value n% between the SOC value B estimated at the current moment and an SOC value A reported to a vehicle controller at the previous moment is calculated; thirdly, whether the absolute value of the difference value n% is larger than a preset jumping limiting value x% or not is judged, wherein the preset jumping limiting value x% is larger than zero, the SOC value B at the current moment is directly reported to the vehicle controller if the absolute value of the difference value n% is smaller than or equal to the preset jumping limiting value x%, and the next step is executed if the absolute value of the difference value n% is larger than the preset jumping limiting value x%; fourthly, whether the difference value n% is larger than zero or not is judged, if the difference value n% is larger than zero, the SOC value at the current moment is reported to the vehicle controller with B+x%, and if the difference value n% is smaller than or equal to zero, the SOC value at the current moment is reported to the vehicle controller with B-x%.
Description
Technical field
The present invention relates to power cell of vehicle administrative skill field, in more particularly to a kind of power cell of vehicle SOC value
Reporting method, device and battery management system.
Background technology
SOC (State of charge), i.e. state-of-charge, it is used for reflecting the residual capacity of battery, its numerical value (SOC
Value) it is defined as the ratio of battery remaining power and battery rated capacity.
In pure electric vehicle or motor vehicle driven by mixed power, entire car controller combines the SOC value and driver's drive demand for reporting
To be allocated to moment of torsion, to electric machine controller command adapted thereto is sent.Driver and passenger can be understood pure electronic by SOC value
The course continuation mileage of vehicle.
Existing SOC value report method is that battery management system estimation is obtained after electrokinetic cell SOC value, directly by the SOC
Value reports entire car controller.
The SOC value that estimation is obtained directly is reported it is possible that the SOC value for reporting and the front SOC value difference for once reporting
It is very big, and there is the phenomenon of larger saltus step.Mainly occurs the larger saltus step of SOC value in the following two cases：
(1) when vehicle restarts, the SOC value for reporting first differs greatly with last SOC value during previous parking.
In addition to the estimation error of itself, battery is during shelving, it is understood that there may be self-discharge phenomenon, also result in vehicle and open again
SOC value when dynamic is less than the SOC value reported during previous parking.
(2) in vehicle operation, due to the change of emergent high current or evaluation method, and cause occur compared with
Big saltus step.
The larger saltus step of such SOC value reduces the experience sense of driver and passenger, also considerably increases full-vehicle control
The control difficulty of device.So that entire car controller processes ride comfort when moment of torsion distributes and reduces, and speed and vehicle accelerating ability can it is steady
It is qualitative inadequate.
The content of the invention
The technical problem to be solved is easily caused for existing power cell of vehicle SOC value report method
There is the defect of larger saltus step compared with previous in the SOC value for reporting, there is provided a kind of power cell of vehicle SOC value report method.
The present invention solve the technical scheme that adopted of above-mentioned technical problem for, there is provided in a kind of power cell of vehicle SOC value
Reporting method, methods described includes：
Estimate SOC value B at electrokinetic cell current time；
SOC value B and previous moment that calculating current time estimation is obtained report SOC value A of entire car controller
Difference n%；
Whether the absolute value of difference n% is judged more than default saltus step limit value x%, wherein, default saltus step limit value
X% is more than 0；If the absolute value of difference n% is less than or equal to default saltus step limit value x%, directly by current time
SOC value B reports the entire car controller；If the absolute value of difference n% is more than default saltus step limit value x%, enter
Next step；
Judge difference n% whether more than 0；If difference n% is more than 0, reports to the entire car controller and work as
The SOC value at front moment is B-x%；If difference n% is less than or equal to 0, to the entire car controller current time is reported
SOC value be B+x%.
Further, described " estimating SOC value B at electrokinetic cell current time " is specially：
The voltage of collection vehicle electrokinetic cell, electric current and temperature data, and according to the power cell of vehicle of collection
Voltage, electric current and temperature data estimate the SOC value at electrokinetic cell current time.
Further, the SOC value of an electrokinetic cell is estimated at predetermined time intervals.
Further, the obtaining value method of the saltus step limit value x% is as follows：
Determine x% initial value xc%；
Driving vehicle carries out the test of normal and limiting condition；
Judge to be run under vehicle each operating mode and whether smooth out；If operation smooth-going, the saltus step under vehicle each operating mode
Limit value x% values are xc%；If vehicle runs irregularity under arbitrary operating mode, initial value xc% is changed, until vehicle is each
Till operation is smoothed out under individual operating mode.
Vehicle according to the invention electrokinetic cell SOC value report method, first estimates the SOC at electrokinetic cell current time
Value, and calculate the SOC value at current time and previous moment report entire car controller SOC value difference, if the difference is exhausted
Default saltus step limit value (acceptable maximum hop value) is more than to value, then illustrate the SOC value that reports of current time occur in that compared with
Big saltus step, then when the SOC value that current time estimation is obtained is more than the SOC value that previous moment is reported, on entire car controller
The SOC value at report current time is that the SOC value that current time estimation is obtained deducts default saltus step limit value；And in current time estimation
When the SOC value for obtaining is less than or equal to the SOC value that previous moment is reported, the SOC value at current time is reported to be to entire car controller
The SOC value that current time estimation is obtained adds default saltus step limit value, so so that the SOC value that current time estimation is obtained exists
In the case that the SOC value reported with respect to previous moment increases, the SOC value at the current time reported to entire car controller with it is previous when
The absolute value of the difference of the SOC value at quarter is less than default saltus step limit value；In the same manner so that the SOC value that current time estimation is obtained exists
In the case that the SOC value reported with respect to previous moment reduces, the SOC value at the current time reported to entire car controller with it is previous when
The absolute value of the difference of the SOC value at quarter is larger so as to avoid the SOC value for reporting appearance not over default saltus step limit value
Saltus step so that the close actual value of SOC value for reporting.The power cell of vehicle SOC value report method of the present invention, is not increasing hardware
On the premise of cost, only by the modification and simple test of software algorithm, existing power cell of vehicle SOC value can be solved and reported
Method is given the correct time on SOC value is carried out and the problem of larger saltus step occurs.
In addition, present invention also offers a kind of power cell of vehicle SOC value reporting device, including：
SOC value estimation block, for estimating SOC value B at electrokinetic cell current time；
SOC value Leveling Block, for calculate SOC value B that obtains of current time estimation report with previous moment it is whole
Difference n% of SOC value A of vehicle controller；Then,
Whether the absolute value of difference n% is judged more than default saltus step limit value x%, wherein, default saltus step limit value
X% is more than 0；If the absolute value of difference n% is less than or equal to default saltus step limit value x%, the SOC value Leveling Block
Directly SOC value B at current time is reported into the entire car controller；If the absolute value of difference n% is more than default jump
Become limit value x%, then the SOC value Leveling Block is further judged, i.e.,：
It is described that the SOC value Leveling Block judges that SOC value B that current time estimation is obtained is reported with previous moment
Whether difference n% of SOC value A of entire car controller is more than 0；If difference n% is more than 0, the SOC value smooths mould
It is B-x% that block reports the SOC value at current time to the entire car controller；If difference n% is less than or equal to 0, described
It is B+x% that SOC value Leveling Block reports the SOC value at current time to the entire car controller.
Further, the power cell of vehicle SOC value reporting device also includes data acquisition module, the data acquisition
Module is used for the voltage of collection vehicle electrokinetic cell, electric current and temperature data, and by the electricity of the power cell of vehicle of collection
Pressure, electric current and temperature data are sent to the SOC value estimation block.
Further, the SOC value estimation block estimates at predetermined time intervals the SOC value of an electrokinetic cell.
Vehicle according to the invention electrokinetic cell SOC value reporting device, it is current that SOC value estimation block estimates electrokinetic cell
The SOC value at moment, SOC value Leveling Block calculates the SOC value at current time and previous moment reports the entire car controller
SOC value difference, if the absolute value of the difference be more than default saltus step limit value (acceptable maximum hop value), illustrate ought
The SOC value that the front moment reports occurs in that larger saltus step, then the SOC value for obtaining in current time estimation is reported more than previous moment
SOC value when, it is the SOC that obtains of current time estimation that SOC value Leveling Block reports the SOC value at current time to entire car controller
Value deducts default saltus step limit value；And estimate the SOC value for obtaining less than or equal to the SOC value that previous moment is reported at current time
When, SOC value Leveling Block to entire car controller reports the SOC value that the SOC value at current time is that current time estimation is obtained to add
Default saltus step limit value, so so that the SOC value that current time estimation is obtained increases in the SOC value that relative previous moment is reported
In the case of, the SOC value at the current time reported to entire car controller is less than with the absolute value of the difference of the SOC value of previous moment
Default saltus step limit value；In the same manner so that the SOC value that current time estimation is obtained reduces in the SOC value that relative previous moment is reported
In the case of, the SOC value at the current time reported to entire car controller will not with the absolute value of the difference of the SOC value of previous moment
More than default saltus step limit value, there is larger saltus step so as to avoid the SOC value for reporting so that the SOC value for reporting is close to true
It is real-valued.
In addition present invention also offers a kind of battery management system, it includes that above-mentioned power cell of vehicle SOC value is reported
Device.
Description of the drawings
Fig. 1 is the schematic flow sheet of the power cell of vehicle SOC value report method that one embodiment of the invention is provided；
The block diagram of the power cell of vehicle SOC value reporting device that Fig. 2 one embodiment of the invention is provided.
Reference in Figure of description is as follows：
100th, power cell of vehicle SOC value reporting device；10th, data acquisition module；20th, SOC value estimation block；30、SOC
Value Leveling Block；200th, entire car controller.
Specific embodiment
In order that technical problem solved by the invention, technical scheme and beneficial effect become more apparent, below in conjunction with
Drawings and Examples, are described in further detail to the present invention.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
As shown in figure 1, the power cell of vehicle SOC value report method that one embodiment of the invention is provided comprises the steps：
101st, SOC value B of electrokinetic cell current time t2 is estimated.Step 101 is specifically, system acquisition vehicle power is electric
The data such as the voltage in pond, electric current and temperature, and according to data such as the voltage of the power cell of vehicle of collection, electric current and temperature
Estimate the SOC value of electrokinetic cell current time t2.How according to the voltage of the power cell of vehicle of collection, electric current and temperature
It is routine techniques that the data estimations such as degree go out the SOC value of electrokinetic cell current time t2, is not described in detail herein.Step 101 is every predetermined
Time is carried out once, i.e., estimate the SOC value of an electrokinetic cell at predetermined time intervals.
102nd, SOC value B and previous moment t1 that calculating current time t2 estimation is obtained reports entire car controller
Difference n% of SOC value A.Current time t2 as estimates the time interval of the SOC value of electrokinetic cell with the difference of previous moment t1
(being also the time interval for often reporting a SOC value), i.e., every the SOC value of electrokinetic cell of t2-t1 time estimations, that is,
Say and report an electrokinetic cell SOC value to entire car controller every the t2-t1 times.Time interval t2-t1 sets as needed.
So, the circulation for just realizing SOC value is reported.
103rd, whether the absolute value of difference n% is judged more than default saltus step limit value x%, wherein, default saltus step
Limit value x% is more than 0；If the absolute value of difference n% is less than or equal to default saltus step limit value x%, when directly will be current
SOC value B for carving t2 reports the entire car controller；If the absolute value of difference n% is more than default saltus step limit value x%,
Then enter step 104.
In the present embodiment, the obtaining value method of the saltus step limit value x% is as follows：
S1, determine x% initial value xc%；Xc% is rule of thumb obtained, or is obtained by Computer Simulation.
S2, driving vehicle carry out the test of normal and limiting condition.
S3, judge to be run under vehicle each operating mode and whether smooth out；If operation smooth-going, the jump under vehicle each operating mode
Become limit value x% values into xc%；If vehicle runs irregularity under arbitrary operating mode, initial value xc% is changed, until vehicle exists
Till operation is smoothed out under each operating mode.
104th, judge difference n% whether more than 0；If difference n% is more than 0, on the entire car controller
The SOC value of report current time t2 is B-x%；If difference n% is less than or equal to 0, reports to the entire car controller and work as
The SOC value of front moment t2 is B+x%.
Power cell of vehicle SOC value report method according to the above embodiment of the present invention, first estimates electrokinetic cell current
The SOC value at moment, and calculate the SOC value at current time and previous moment report entire car controller SOC value difference, if should
The absolute value of difference is more than default saltus step limit value (acceptable maximum hop value), then the SOC value that explanation current time reports
Larger saltus step is occurred in that, then when the SOC value that current time estimation is obtained is more than the SOC value that previous moment is reported, to car load
The SOC value at controller report current time is that the SOC value that current time estimation is obtained deducts default saltus step limit value；And current
When the SOC value that moment estimation is obtained is less than or equal to the SOC value that previous moment is reported, to entire car controller current time is reported
SOC value is that the SOC value that current time estimation is obtained adds default saltus step limit value, so so that current time estimation is obtained
SOC value in the case where SOC value that relative previous moment is reported increases, the SOC value at the current time reported to entire car controller
Default saltus step limit value is less than with the absolute value of the difference of the SOC value of previous moment；In the same manner so that current time estimation is obtained
SOC value in the case where SOC value that relative previous moment is reported reduces, the SOC value at the current time reported to entire car controller
With the absolute value of the difference of the SOC value of previous moment not over default saltus step limit value, go out so as to avoid the SOC value for reporting
Existing larger saltus step so that the close actual value of SOC value for reporting.In the power cell of vehicle SOC value of the above embodiment of the present invention
Reporting method, on the premise of hardware cost is not increased, only by the modification and simple test of software algorithm, can solve existing car
Electrokinetic cell SOC value report method gives the correct time on SOC value is carried out and the problem of larger saltus step occurs.
In addition, as shown in Fig. 2 present invention also offers a kind of power cell of vehicle SOC value reporting device 100, its is integrated
Outside in battery management system or independently of battery management system, including：
Data acquisition module 10, the data acquisition module 10 is used for voltage, electric current and the temperature of collection vehicle electrokinetic cell
The data such as degree, and the data is activations such as the voltage of the power cell of vehicle of collection, electric current and temperature are estimated to following SOC values
Calculate module 20.Data acquisition module 10 is module conventional in battery management system.
SOC value estimation block 20, for estimating SOC value B at electrokinetic cell current time；SOC value estimation block 20 is
Conventional module in battery management system.SOC value estimation block 20 during the use of electrokinetic cell, when persistently carrying out current
The estimation of SOC value B is carved, the SOC value of electrokinetic cell so can be persistently reported.
SOC value Leveling Block 30, for calculating SOC value B and previous moment t1 that current time t2 estimations are obtained
Offer difference n% of SOC value A of the entire car controller；Then,
Whether the absolute value of difference n% is judged more than default saltus step limit value x%, wherein, default saltus step limit value
X% is more than 0；If the absolute value of difference n% is less than or equal to default saltus step limit value x%, the SOC value Leveling Block
SOC value B of current time t2 is directly reported the entire car controller 200 by 30；If the absolute value of difference n% is more than pre-
If saltus step limit value x%, then the SOC value Leveling Block 30 further judged, i.e.,：
The SOC value Leveling Block 30 judges that SOC value B that current time estimation is obtained is reported with previous moment t1
Whether difference n% of SOC value A of the entire car controller is more than 0；If difference n% is more than 0, the SOC value is put down
It is B-x% that sliding formwork block 30 reports the SOC value of current time t2 to the entire car controller 200；If difference n% is less than or waits
In 0, then it is B+x% that the SOC value Leveling Block 30 reports the SOC value of current time t2 to the entire car controller 200.
If the power cell of vehicle SOC value reporting device 100 is integrated in battery management system, SOC value smooths mould
Block 30 is the module newly increased in battery management system, and it realizes corresponding work(by writing corresponding algorithm software on chip
Energy.
In the present embodiment, the SOC value estimation block estimates at predetermined time intervals the SOC value of an electrokinetic cell, currently
Moment t2 as estimates that the time interval of the SOC value of electrokinetic cell (is also often to report a SOC value with the difference of previous moment t1
Time interval), i.e., every the SOC value of electrokinetic cell of t2-t1 time estimations, that is to say, that every the t2-t1 times to whole
Vehicle controller reports an electrokinetic cell SOC value.Time interval t2-t1 sets as needed.So, SOC value is just realized
Circulation report.
Power cell of vehicle SOC value reporting device according to the above embodiment of the present invention, SOC value estimation block estimation is set out
The SOC value at power battery current time, SOC value Leveling Block calculate current time SOC value report with previous moment it is described whole
The difference of the SOC value of vehicle controller, if the absolute value of the difference is more than (the acceptable maximum saltus step of default saltus step limit value
Value), then the SOC value that explanation current time reports occurs in that larger saltus step, then the SOC value for obtaining in current time estimation is more than
During the SOC value that previous moment is reported, it is current time that SOC value Leveling Block reports the SOC value at current time to entire car controller
The SOC value that estimation is obtained deducts default saltus step limit value；And when estimating that the SOC value for obtaining is less than or equal to previous at current time
When engraving the SOC value of report, SOC value Leveling Block to entire car controller reports the SOC value at current time to estimate for current time
The SOC value for arriving adds default saltus step limit value, so so that the SOC value that current time estimation is obtained is in relative previous moment
In the case that the SOC value of report increases, the difference of the SOC value at the current time reported to entire car controller and the SOC value of previous moment
The absolute value of value is less than default saltus step limit value；In the same manner so that the SOC value that current time estimation is obtained is in relative previous moment
In the case that the SOC value of report reduces, the difference of the SOC value at the current time reported to entire car controller and the SOC value of previous moment
There is larger saltus step so that report not over default saltus step limit value so as to avoid the SOC value for reporting in the absolute value of value
The close actual value of SOC value.
In addition, present invention also offers a kind of battery management system, it includes that above-mentioned power cell of vehicle SOC value is reported
Device.
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (7)
1. a kind of power cell of vehicle SOC value report method, it is characterised in that methods described includes：
Estimate SOC value B at electrokinetic cell current time；
SOC value B that calculating current time estimation is obtained reports the difference of SOC value A of entire car controller with previous moment
N%；
Whether the absolute value of difference n% is judged more than default saltus step limit value x%, wherein, default saltus step limit value x% is big
In 0；If the absolute value of difference n% is less than or equal to default saltus step limit value x%, directly by SOC value B at current time
Report the entire car controller；If the absolute value of difference n% is more than default saltus step limit value x%, into next step
Suddenly；
Judge difference n% whether more than 0；If difference n% is more than 0, when reporting current to the entire car controller
The SOC value at quarter is B-x%；If difference n% is less than or equal to 0, to the entire car controller SOC at current time is reported
It is worth for B+x%；
The obtaining value method of the saltus step limit value x% is as follows：
Determine x% initial value xc%；
Driving vehicle carries out the test of normal and limiting condition；
Judge to be run under vehicle each operating mode and whether smooth out；If operation smooth-going, the saltus step limit value under vehicle each operating mode
X% values are xc%；If vehicle runs irregularity under arbitrary operating mode, initial value xc% is changed, until vehicle is in each work
Till operation is smoothed out under condition.
2. power cell of vehicle SOC value report method according to claim 1, it is characterised in that described " to estimate power
SOC value B at battery current time " is specially：
The voltage of collection vehicle electrokinetic cell, electric current and temperature data, and according to collection the power cell of vehicle voltage,
Electric current and temperature data estimate the SOC value at electrokinetic cell current time.
3. power cell of vehicle SOC value report method according to claim 1, it is characterised in that estimate at predetermined time intervals
Calculate the SOC value of an electrokinetic cell.
4. a kind of power cell of vehicle SOC value reporting device, it is characterised in that include：
SOC value estimation block, for estimating SOC value B at electrokinetic cell current time；
SOC value Leveling Block, car load control is reported for calculating SOC value B that current time estimation is obtained with previous moment
Difference n% of SOC value A of device processed；Then,
Whether the absolute value of difference n% is judged more than default saltus step limit value x%, wherein, default saltus step limit value x% is big
In 0；If the absolute value of difference n% is less than or equal to default saltus step limit value x%, the SOC value Leveling Block is direct
SOC value B at current time is reported into the entire car controller；If the absolute value of difference n% is limited more than default saltus step
Value x%, then the SOC value Leveling Block further judged, i.e.,：
The SOC value Leveling Block judges that SOC value B that current time estimation is obtained reports the car load with previous moment
Whether difference n% of SOC value A of controller is more than 0；If difference n% be more than 0, the SOC value Leveling Block to
It is B-x% that the entire car controller reports the SOC value at current time；If difference n% is less than or equal to 0, the SOC value
It is B+x% that Leveling Block reports the SOC value at current time to the entire car controller；
The obtaining value method of the saltus step limit value x% is as follows：
Determine x% initial value xc%；
Driving vehicle carries out the test of normal and limiting condition；
Judge to be run under vehicle each operating mode and whether smooth out；If operation smooth-going, the saltus step limit value under vehicle each operating mode
X% values are xc%；If vehicle runs irregularity under arbitrary operating mode, initial value xc% is changed, until vehicle is in each work
Till operation is smoothed out under condition.
5. power cell of vehicle SOC value reporting device according to claim 4, it is characterised in that the vehicle power electricity
SOC value reporting device in pond also includes data acquisition module, the data acquisition module be used for collection vehicle electrokinetic cell voltage,
Electric current and temperature data, and the voltage of the power cell of vehicle of collection, electric current and temperature data are sent to into the SOC value
Estimation block.
6. the power cell of vehicle SOC value reporting device according to claim 4 or 5, it is characterised in that the SOC value is estimated
Calculate the SOC value that module estimates at predetermined time intervals an electrokinetic cell.
7. a kind of battery management system, it is characterised in that including the power cell of vehicle SOC described in any one of claim 4-6
Value reporting device.
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| CN108663624A (en) * | 2017-04-01 | 2018-10-16 | 郑州宇通客车股份有限公司 | A kind of automotive battery system state-of-charge modification method and device |
| CN108663625B (en) * | 2017-04-01 | 2019-12-06 | 郑州宇通客车股份有限公司 | battery charge state dynamic following method and device |
| CN107831445A (en) * | 2017-10-30 | 2018-03-23 | 深圳市道通智能航空技术有限公司 | A kind of method and apparatus for obtaining battery dump energy |
| CN108445405A (en) * | 2018-03-07 | 2018-08-24 | 湖南小步科技有限公司 | SOC modification methods, device and battery management system in a kind of charge and discharge process |
| CN109941111B (en) * | 2019-04-28 | 2021-02-19 | 广州小鹏汽车科技有限公司 | Method for estimating remaining driving range and electric automobile |
| CN110068773A (en) * | 2019-04-29 | 2019-07-30 | 北京长城华冠汽车科技股份有限公司 | The method and apparatus of output power battery SOC, medium, electronic equipment |
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| CN102959419A (en) * | 2010-06-08 | 2013-03-06 | 日产自动车株式会社 | Capacity estimating apparatus for secondary battery |
| JP2013083525A (en) * | 2011-10-07 | 2013-05-09 | Toyota Motor Corp | Vehicle controller and residual capacity estimation method |
| CN102508169A (en) * | 2011-11-07 | 2012-06-20 | 浙江绿源电动车有限公司 | Device and method for obtaining battery capacity |
| CN103675701A (en) * | 2013-11-29 | 2014-03-26 | 宇龙计算机通信科技(深圳)有限公司 | Battery state-of-charge correction method and device |
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