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 PDF

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CN104943553B
CN104943553B CN201410123334.8A CN201410123334A CN104943553B CN 104943553 B CN104943553 B CN 104943553B CN 201410123334 A CN201410123334 A CN 201410123334A CN 104943553 B CN104943553 B CN 104943553B
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soc value
vehicle
soc
difference
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CN104943553A (en
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梅骜
郑银俊
符兴锋
涂成姣
罗杰
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GAC Aion New Energy Automobile Co Ltd
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Guangzhou Automobile Group Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries

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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

Power cell of vehicle SOC value report method, device and battery management system
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.
CN201410123334.8A 2014-03-28 2014-03-28 Vehicle power battery SOC value reporting method and device and battery management system Active CN104943553B (en)

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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
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