CN107656209A - The battery SOC display methods and system of a kind of electric automobile - Google Patents

The battery SOC display methods and system of a kind of electric automobile Download PDF

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Publication number
CN107656209A
CN107656209A CN201710743302.1A CN201710743302A CN107656209A CN 107656209 A CN107656209 A CN 107656209A CN 201710743302 A CN201710743302 A CN 201710743302A CN 107656209 A CN107656209 A CN 107656209A
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Prior art keywords
soc
soc value
mfrac
mrow
battery
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赵辛蒙
张君鸿
王帅宇
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Beijing Idrive Automobile Co Ltd
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Beijing Idrive Automobile Co Ltd
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Priority to CN201710743302.1A priority Critical patent/CN107656209A/en
Publication of CN107656209A publication Critical patent/CN107656209A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/385—Arrangements for measuring battery or accumulator variables
    • G01R31/387—Determining ampere-hour charge capacity or SoC

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention provides the battery SOC display methods and system of a kind of electric automobile.Including：A, the electric automobile currently affiliated operating mode is detected；B, SOC computational methods corresponding with the operating mode are obtained, and the SOC value for display is calculated according to the computational methods；C, the SOC value for being used to show is shown by the display unit of the electric automobile.By upper, the display methods of the application can be such that driver preferably assesses battery system surplus capacity, so as to determine the occupation mode to vehicle.

Description

The battery SOC display methods and system of a kind of electric automobile
Technical field
The present invention relates to battery electric quantity display field.More particularly to a kind of batteries of electric automobile SOC display methods and system.
Background technology
SOC (State of charge, state-of-charge, be also dump energy) algorithm is battery management system (BMS) exploitation One of key technology of application, because SOC can not direct measurement, it is necessary to which BMS is estimated, its estimation precision largely determines Battery performance plays, service life and driver actually use impression.In order to improve SOC estimation precision, BMS is to every in battery bag Individual battery core monomer calculates SOC and has become one of main stream approach, the result is that tens or up to a hundred individual real-time updates will be obtained simultaneously SOC value.And unique SOC value is only able to display in instrument and is supplied to driver, driver can assess vehicle dump energy accordingly. Common mode is shown after all battery core monomer SOC are averaged.There is following drawback in this method, each when battery After individual battery core SOC value uniformity is deteriorated (numerical value having is big, and some numerical value is small), the average SOC that instrument is shown can not reflect individual The big SOC of other difference battery core situation, and the common Preservation tactics of BMS are all based on avoiding " poor-performing battery core becomes worse " What this thinking was formulated, so that when average SOC is also in normal range (NR), in order to protect indivedual battery cores to enable certain Kind protection mechanism, such as restricted speed, forbid electric discharge etc..So for example, when driver's electric vehicle drive is in driving, drive The person of sailing is based on average SOC and vehicle driving course, or charging complete remaining time etc. is estimated, it is easy to does sentencing of making mistake It is disconnected, influence normal use.
Therefore, a kind of electric automobile SOC display methods is needed badly at present, so that driver preferably remains to battery system accordingly Complementary energy power is assessed, so as to which decision-making is to the occupation mode of vehicle.
The content of the invention
In view of this, present applicant proposes the display methods of SOC a kind of and system, driver can be made preferably to battery System spare ability is assessed, so as to determine the occupation mode to vehicle.
The application provides a kind of battery SOC display methods of electric automobile, including：
A, the electric automobile currently affiliated operating mode is detected；
B, SOC computational methods corresponding with the operating mode are obtained, and the SOC for display is calculated according to the computational methods Value；
C, the SOC value for being used to show is shown by the display unit of the electric automobile.
By upper, the application is by detecting the electric automobile currently affiliated operating mode；And detected according further to described Operating mode select corresponding SOC computational methods, so as to the operating mode according to belonging to electric automobile is current, (such as automobile is just Charged in driving or in parking) its corresponding SOC computational methods is selected, and calculate SOC value according to the computational methods and show Show；So that driver is preferably assessed battery system surplus capacity, so as to determine the occupation mode to vehicle.
Preferably, when detected in step A the electric automobile currently affiliated operating mode for driving when, the step B includes：
B1, acquisition are arranged at each SOC value of each battery core of the battery in the electric car；And calculate whole battery cores Highest SOC value in each SOC value and minimum SOC value in current averagely SOC value and each battery core of acquisition；
Electric discharge SOC computational methods corresponding to B2, the interval selection according to belonging to the current averagely SOC value；
B3, obtain according to the electric discharge SOC computational methods SOC value for display.
Preferably, the step B2 includes：
When the section belonging to the current averagely SOC value is [90%-100%], based on the SOC value by showing Calculation method is：
SOC_DCH1=Max Cell SOC
Wherein, the MaxCell SOC are the highest in each SOC value in each battery core of the battery of the electric automobile SOC value；
When the section belonging to the current averagely SOC value is [80%-90%], based on the SOC value by showing Calculation method is：
Wherein, the Avg Cell soc are the SOC value that is currently averaged of whole battery cores；The MaxCell SOC are each Highest SOC value in battery core in each SOC value；
When the section belonging to the current averagely SOC value of the electric automobile obtained in the step B1 is [20%-80%], The computational methods of SOC value that are used to show are：
SOC_DCH3=Avg Cell SOC
Wherein, the Avg Cell SOC are the SOC value that is currently averaged of whole battery cores；
When the section belonging to the current averagely SOC value is [15%-20%], based on the SOC value by showing Calculation method is：
Wherein, the Min Cell SOC are the minimum SOC value in each SOC value in each battery core；The Avg Cell SOC are the SOC value that is currently averaged of whole battery cores；
When the section belonging to the current averagely SOC value of the electric automobile obtained in the step B1 is [0%-15%], The computational methods of SOC value that are used to show are：
SOC_DCH5=Min Cell SOC
Wherein, the Min Cell SOC are the minimum SOC value in each SOC value in each battery core.
By upper, the application is further according to currently flat when currently affiliated operating mode is drives a vehicle to the detection electric automobile SOC computational methods corresponding to section belonging to equal SOC value carry out the calculating of SOC value, and are shown, so that driver is more preferable Battery system surplus capacity is assessed, and the occupation mode from decision-making to vehicle.For example, currently it is being averaged belonging to SOC value Section when being [90%-100%], i.e. high electricity when, SOC value is shown as highest SOC value in single battery core, makes it with filling SOC show values after the completion of electricity are consistent, avoid SOC saltus steps.When current section averagely belonging to SOC value is [0%-15%], i.e., During low battery, using SOC value minimum in single battery core, the excessively optimistic estimation vehicle residue course of driver is avoided.In SOC Intermediate region, by being divided into multiple sections, seamlessly transit, to avoid SOC changes too fast, to cause the illusion of driver, with Driver is set preferably to assess battery system surplus capacity, and the occupation mode from decision-making to vehicle.
Preferably, when detected in step A the electric automobile currently affiliated operating mode be parking charging when, the step B bags Include：
Obtain each SOC value of each battery core for the battery being arranged in the electric automobile；And by each SOC of acquisition Highest SOC value in value is as the SOC value for being shown on electric vehicle instrument.
By upper, when parking is charged, operating mode is relatively easy, and the most of the time is all constant-current charge, and latter stage enters constant-voltage charge, It can meet to require using simple display strategy.Simultaneously because charging complete condition be using single battery core ceiling voltage as foundation, Overcharged with avoiding the occurrence of, SOC_CH=Max Cell SOC are used in whole charging process, and single battery core ceiling voltage can To correspond to well.And development process can be simplified, without carrying out parameter calibration.User is by can according to current highest SOC value To estimate the remaining charging interval.
Preferably, the B1 also includes：Obtained at interval of a specified time and be arranged at each of battery in the electric car Each SOC value of individual battery core；And calculate the current averagely SOC value of whole battery cores and obtain in each battery core in each SOC value Highest SOC value and minimum SOC value.
The application also provides a kind of battery SOC display system of electric automobile, including：
Detection module, for detecting the electric automobile currently affiliated operating mode；Wherein, the operating mode includes：Drive a vehicle and stay Car charges；
Acquisition module, each SOC value of each battery core for obtaining the battery being arranged in the electric car；And count Calculate the current averagely SOC value of whole battery cores and obtain highest SOC value in each battery core in each SOC value and minimum SOC value；
Selecting module, for when the detection module detect the electric automobile it is current belonging to operating mode for driving when, The SOC that discharged corresponding to interval selection according to belonging to the current averagely SOC value of acquisition module acquisition judges it is calculated Method；And for when the detection module detect the electric automobile it is current belonging to operating mode for parking charging when, by institute State acquisition module acquisition single battery core in highest SOC value be used as be used for display SOC value；
Computing module, the electric discharge SOC computational methods for being selected according to the selecting module obtain the SOC for display Value.
Display module, the SOC value for being used to show is shown by the display unit of the electric automobile.
Preferably, the display system, in addition to：
Time block；Signal is obtained for sending one to the acquisition module at interval of a specified time, so that it is obtained Each SOC value of each battery core for the battery being arranged in the electric car and calculate whole battery cores currently averagely SOC value with And obtain the highest SOC value in each battery core in each SOC value and minimum SOC value.
In summary, by detecting the electric automobile, currently (electric automobile is divided into driving and stayed affiliated operating mode the application Two big operating modes of car charging).Such as judge that vehicle is in driving operating mode, then further according to average SOC value (the Avg Cell of all battery cores SOC the different sections residing for), corresponding electric discharge SOC (SOC_DCH1 to the SOC_DCH5 in such as above-mentioned formula) calculating side is selected Method, and be shown in instrument；Such as judge that vehicle is in parking charging operating mode, then selection charging SOC computational methods, and be shown to instrument On table.From the foregoing, it will be observed that the application is correspondingly shown according to different situations using different calculations with obtaining more excellent SOC, Be advantageous to driver preferably to assess battery system surplus capacity, and the occupation mode from decision-making to vehicle.
Brief description of the drawings
Fig. 1 is a kind of schematic flow sheet of the battery SOC display methods of electric automobile of the embodiment of the present application；
Fig. 2 is a kind of schematic flow sheet of the battery SOC display methods of electric automobile of the embodiment of the present application；
Fig. 3 is a kind of schematic flow sheet of the battery SOC display methods of electric automobile of the embodiment of the present application；
Fig. 4 is a kind of structural representation of the battery SOC display system of electric automobile of the embodiment of the present application.
Embodiment
The application is illustrated below in conjunction with the accompanying drawing in the embodiment of the present application.
Embodiment one
As shown in Figure 1, 2, the application provides a kind of battery SOC display methods of electric automobile, including：
S101, detect the electric automobile currently affiliated operating mode；Electric automobile work condition includes but is not limited in this application： Driving or parking charging.
S102, SOC value computational methods corresponding with the operating mode are selected, and obtained according to the computational methods for showing SOC value；
Specifically, when detected in step S101 the electric automobile currently affiliated operating mode for driving when, the step S102, Including：
S1021, when battery management system (BMS) is in "on" position, it obtains at interval of a specified time and is arranged at Each SOC value of each battery core of battery in the electric car；And calculate currently averagely SOC value and the acquisition of whole battery cores SOC value minimum in highest SOC value and single battery core in single battery core；
S1022, electric discharge SOC computational methods corresponding to the interval selection according to belonging to the current averagely SOC value；
S1023, the SOC value for display is obtained according to the electric discharge SOC computational methods.
Wherein, the step S1022, including：
1) when the section belonging to the current averagely SOC value of the whole battery cores obtained in the step S1021 is [90%- When 100%], the SOC value computational methods for showing are：
SOC_DCH1=Max Cell SOC
Wherein, the MaxCell SOC are highest SOC value in the single battery core of the battery of the electric automobile；It is described SOC_DCH1 is only a kind of representation, and its implication is when the section belonging to the current averagely SOC value of whole battery cores is [90%- When 100%], the SOC for being used to show of acquisition is calculated.Similarly following SOC_DCH2, SOC_DCH3, SOC_DCH4, SOC_ DCH5 is repeated no more.
2) when the current of whole battery cores of the battery of the electric automobile obtained in the step S1021 is averaged belonging to SOC value Section when being [80%-90%], the SOC value computational methods that are used to show are：
Wherein, the Avg Cell SOC are the SOC value that is currently averaged of whole battery cores；The MaxCell SOC are each Highest SOC value in battery core in each SOC value；The SOC_DCH2 is calculated as weighted filtering algorithm, it is therefore intended that calculates from Max The SOC value of Cell SOC to Avg Cell SOC changeover portions.
Using filtering algorithm, battery can be avoided to switch display strategy in a certain specific SOC value, cause SOC show values There is saltus step, particularly saltus step is obvious when battery consistency is bad, to puzzlement caused by driver.
Such as without using filtering algorithm, SOC display logics switching point set in advance is 85%, then as Avg Cell SOC When dropping to 85%, instrument shows that moment jumps to Avg Cell SOC from Max Cell SOC, when battery consistency is preferable, SOC differences are smaller, typically within 2%, influence less.But after battery consistency is deteriorated, SOC differences tend to exceed 5%, Occur that SOC moments are reduced to less than 85% from more than 90%, influence driver's subjective feeling.
Using filtering algorithm, SOC show values (Avg Cell SOC changes 10%) within relatively long a period of time are complete Into seamlessly transitting from Max Cell SOC to Avg Cell SOC, above mentioned problem can be avoided.
The threshold range 80% and 90% that filtering algorithm enables in above-mentioned formula are calibration values, should be according to battery core type and electricity Chi Bao characteristic is individually demarcated.Threshold range is too small, filter effect unobvious, although SOC will not saltus step, but if change Rate is excessive, and some sensitive clients can equally be discovered；Threshold range is excessive, then president's time showing Max Cell SOC, to driving The actually available electricity of member's battery declines very slow illusion, but actual course continuation mileage does not reach expection again.Two above-mentioned threshold values 80%, 90% is applied to use ternary battery core, and battery core uniformity is the horizontal battery bag of industry main flow.
3) when the section belonging to the current averagely SOC value of the electric automobile obtained in the step S1021 is [20%- When 80%], the computational methods of the SOC value for being used to show are：
SOC_DCH3=Avg Cell SOC
Wherein, the SOC value that is currently averaged for whole battery cores.
4) when the section belonging to the current averagely SOC value of the electric automobile obtained in the step S1021 is [15%- When 20%], the computational methods of the SOC value for being used to show are：
Wherein, the Min Cell SOC are SOC value minimum in single battery core；Described is the current flat of whole battery cores Equal SOC value；In electric discharge latter stage, SOC_DCH4 introducing be based on the consideration of the similar reason of foregoing calculating, it is same to use Weighted filtering algorithm, it is therefore intended that calculate the SOC value from Avg Cell SOC to Min Cell SOC to changeover portion.In formula Threshold value 15% and 20% is equally calibration value.Under normal circumstances when designing instrument, SOC has independent prompting less than 20%, such as There is instrument background color different with high SOC areas, be accompanied with auditory tone cues etc..Since instrument has special prompting, SOC display strategies are synchronous Start to switch, driver's subjective feeling SOC changes are more natural.Compared to SOC_DCH2, SOC disparity ranges narrow down to 5%, be for It is comparatively faster to be switched to display Min Cell SOC, the true remaining electricity of driver current vehicle is informed, to driving Member's sense of urgency, makes it find charging equipment as early as possible, avoids battery core from crossing to put and cause irreversible damage, while effectively avoid vehicle from throwing Anchor.
5) when the section belonging to the current averagely SOC value of the electric automobile obtained in the step S1021 is [0%- When 15%], the computational methods of the SOC value for being used to show are：
SOC_DCH5=Min Cell SOC
Wherein, the Min Cell SOC are SOC value minimum in single battery core.Now, currently it is averaged belonging to SOC value Section is [0%-15%], shows Min Cell SOC, the SOC value of the minimum battery core of the current vehicle of driver is informed, to driving The strong sense of urgency of member, makes it find charging equipment as early as possible, equally also avoids battery core from crossing to put and cause irreversible damage, has simultaneously Effect avoids vehicle from casting anchor.
When detected in step S101 the electric automobile currently affiliated operating mode be parking charging when, the step S102, bag Include：
Obtain each SOC value of each battery core for the battery being arranged in the electric car；And by each SOC value of acquisition In highest SOC value as being shown in SOC value on electric vehicle instrument.
When being charged due to parking, operating mode is relatively easy, and the most of the time is all constant-current charge, and latter stage enters constant-voltage charge, It can meet to require using simple display strategy.Simultaneously because charging complete condition be using single battery core ceiling voltage as foundation, Overcharged with avoiding the occurrence of, SOC_CH=Max Cell SOC are used in whole charging process, and single battery core ceiling voltage can To correspond to well.And development process can be simplified, without carrying out parameter calibration.User is by can according to current highest SOC value To estimate the remaining charging interval.
By upper, the application is further according to currently flat when currently affiliated operating mode is drives a vehicle to the detection electric automobile SOC computational methods corresponding to section belonging to equal SOC value carry out the calculating of SOC value, and are shown, so that driver is more preferable Battery system surplus capacity is assessed, and the occupation mode from decision-making to vehicle.For example, currently it is being averaged belonging to SOC value Section when being [90%-100%], i.e. high electricity when, SOC value is shown as highest SOC value in single battery core, makes it with filling SOC show values after the completion of electricity are consistent, avoid SOC saltus steps.When current section averagely belonging to SOC value is [0%-15%], i.e., During low battery, using SOC value minimum in single battery core, the excessively optimistic estimation vehicle residue course of driver is avoided.In SOC Intermediate region, by being divided into multiple sections, seamlessly transit, to avoid SOC changes too fast, to cause the illusion of driver, with Driver is set preferably to assess battery system surplus capacity, and the occupation mode from decision-making to vehicle.
S103, the SOC value for being used to show is shown by the display unit of the electric automobile.Wherein, it is described aobvious Show part can be electric vehicle instrument or other.
In addition, the application can also be as shown in figure 3, as carried out section successively when judging currently to be averaged the section belonging to SOC value Judge, and when completing SOC display, when judging that battery management system (BMS) controller still operationally, again returns to Execution judges the step of electric automobile driving operating mode.
In summary, by detecting the electric automobile, currently (electric automobile is divided into driving and stayed affiliated operating mode the application Two big operating modes of car charging).Such as judge that vehicle is in driving operating mode, then further, further according to the average SOC value of all battery cores Different sections residing for (Avg Cell SOC), select corresponding electric discharge SOC (SOC_DCH1 to the SOC_ in such as above-mentioned formula DCH5) computational methods, and be shown in instrument；Such as judge that vehicle is in parking charging operating mode, then selection charging SOC calculating sides Method, and be shown in instrument.From the foregoing, it will be observed that the application according to different situations correspondingly using different calculations to obtain more Excellent SOC is shown, is advantageous to driver and preferably battery system surplus capacity is assessed, and the use from decision-making to vehicle Mode.
Embodiment two
The battery SOC display methods of electric automobile based on embodiment one, the application also provide a kind of electricity of electric automobile Pond SOC display systems, including：
Detection module, for detecting the electric automobile currently affiliated operating mode；Wherein, the operating mode includes：Drive a vehicle and stay Car charges；
Acquisition module, each SOC value of each battery core for obtaining the battery being arranged in the electric car；And count Calculate the current averagely SOC value of whole battery cores and obtain highest SOC value in each battery core in each SOC value and minimum SOC value；
Selecting module, for when the detection module detect the electric automobile it is current belonging to operating mode for driving when, The SOC that discharged corresponding to interval selection according to belonging to the current averagely SOC value of acquisition module acquisition judges it is calculated Method；And for when the detection module detect the electric automobile it is current belonging to operating mode for parking charging when, by institute State acquisition module acquisition single battery core in highest SOC value be used as be used for display SOC value；
Computing module, the electric discharge SOC computational methods for being selected according to the selecting module obtain the SOC for display Value.
Display module, the SOC value for being used to show is shown by the display unit of the electric automobile.Wherein, institute State display unit can be electric vehicle instrument or other.
Wherein, the display system, in addition to：
Time block；Signal is obtained for sending one to the acquisition module at interval of a specified time, so that it is obtained Each SOC value of each battery core for the battery being arranged in the electric car and calculate whole battery cores currently averagely SOC value with And obtain the highest SOC value in each battery core in each SOC value and minimum SOC value.
In summary, by detecting the electric automobile, currently (electric automobile is divided into driving and stayed affiliated operating mode the application Two big operating modes of car charging).Such as judge that vehicle is in driving operating mode, then further, further according to the average SOC value of all battery cores Different sections residing for (Avg Cell SOC), select corresponding electric discharge SOC (SOC_DCH1 to the SOC_ in such as above-mentioned formula DCH5) computational methods, and be shown in instrument；Such as judge that vehicle is in parking charging operating mode, then selection charging SOC calculating sides Method, and be shown in instrument.From the foregoing, it will be observed that the application according to different situations correspondingly using different calculations to obtain more Excellent SOC is shown, is advantageous to driver and preferably battery system surplus capacity is assessed, and the use from decision-making to vehicle Mode.

Claims (7)

  1. A kind of 1. battery SOC display methods of electric automobile, it is characterised in that including：
    A, the electric automobile currently affiliated operating mode is detected；
    B, SOC computational methods corresponding with the operating mode are obtained, and the SOC value for display is calculated according to the computational methods；
    C, the SOC value for being used to show is shown by the display unit of the electric automobile.
  2. 2. according to the method for claim 1, it is characterised in that when detecting the electric automobile currently affiliated work in step A When condition is drives a vehicle, the step B includes：
    B1, acquisition are arranged at each SOC value of each battery core of the battery in the electric car；And calculate the current of whole battery cores Highest SOC value in each SOC value and minimum SOC value in average SOC value and each battery core of acquisition；
    Electric discharge SOC computational methods corresponding to B2, the interval selection according to belonging to the current averagely SOC value；
    B3, obtain according to the electric discharge SOC computational methods SOC value for display.
  3. 3. according to the method for claim 2, it is characterised in that the step B2 includes：
    When the section belonging to the current averagely SOC value is [90%-100%], the calculating side of the SOC value for being used to show Method is：
    SOC_DCH1=Max Cell SOC
    Wherein, the MaxCell SOC are the highest in each SOC value in each battery core of the battery of the electric automobile SOC value；
    When the section belonging to the current averagely SOC value is [80%-90%], the calculating side of the SOC value for being used to show Method is：
    <mrow> <msub> <mi>SOC</mi> <mrow> <mi>D</mi> <mi>C</mi> <mi>H</mi> <mn>2</mn> </mrow> </msub> <mo>=</mo> <mfrac> <mrow> <mi>A</mi> <mi>v</mi> <mi>g</mi> <mi> </mi> <mi>C</mi> <mi>e</mi> <mi>l</mi> <mi>l</mi> <mfrac> <mrow> <mi>S</mi> <mi>O</mi> <mi>C</mi> </mrow> <mn>80</mn> </mfrac> </mrow> <mfrac> <mn>90</mn> <mn>80</mn> </mfrac> </mfrac> <mo>&amp;times;</mo> <mi>M</mi> <mi>a</mi> <mi>x</mi> <mi> </mi> <mi>C</mi> <mi>e</mi> <mi>l</mi> <mi>l</mi> <mi> </mi> <mi>S</mi> <mi>O</mi> <mi>C</mi> <mo>+</mo> <mfrac> <mrow> <mfrac> <mn>90</mn> <mrow> <mi>A</mi> <mi>v</mi> <mi>g</mi> </mrow> </mfrac> <mi>C</mi> <mi>e</mi> <mi>l</mi> <mi>l</mi> <mi> </mi> <mi>S</mi> <mi>O</mi> <mi>C</mi> </mrow> <mfrac> <mn>90</mn> <mn>80</mn> </mfrac> </mfrac> <mo>&amp;times;</mo> <mi>A</mi> <mi>v</mi> <mi>g</mi> <mi> </mi> <mi>C</mi> <mi>e</mi> <mi>l</mi> <mi>l</mi> <mi> </mi> <mi>S</mi> <mi>O</mi> <mi>C</mi> </mrow>
    Wherein, the Avg Cell soc are the SOC value that is currently averaged of whole battery cores；The MaxCell SOC are each battery core In highest SOC value in each SOC value；
    It is described when the section belonging to the current averagely SOC value of the electric automobile obtained in the step B1 is [20%-80%] Computational methods for the SOC value of display are：
    SOC_DCH3=Avg Cell SOC
    Wherein, the Avg Cell SOC are the SOC value that is currently averaged of whole battery cores；
    When the section belonging to the current averagely SOC value is [15%-20%], the calculating side of the SOC value for being used to show Method is：
    <mrow> <msub> <mi>SOC</mi> <mrow> <mi>D</mi> <mi>C</mi> <mi>H</mi> <mn>4</mn> </mrow> </msub> <mo>=</mo> <mfrac> <mrow> <mi>A</mi> <mi>v</mi> <mi>g</mi> <mi> </mi> <mi>C</mi> <mi>e</mi> <mi>l</mi> <mi>l</mi> <mfrac> <mrow> <mi>S</mi> <mi>O</mi> <mi>C</mi> </mrow> <mn>15</mn> </mfrac> </mrow> <mfrac> <mn>20</mn> <mn>15</mn> </mfrac> </mfrac> <mo>&amp;times;</mo> <mi>A</mi> <mi>v</mi> <mi>g</mi> <mi> </mi> <mi>C</mi> <mi>e</mi> <mi>l</mi> <mi>l</mi> <mi> </mi> <mi>S</mi> <mi>O</mi> <mi>C</mi> <mo>+</mo> <mfrac> <mrow> <mfrac> <mn>20</mn> <mrow> <mi>A</mi> <mi>v</mi> <mi>g</mi> </mrow> </mfrac> <mi>C</mi> <mi>e</mi> <mi>l</mi> <mi>l</mi> <mi> </mi> <mi>S</mi> <mi>O</mi> <mi>C</mi> </mrow> <mfrac> <mn>20</mn> <mn>15</mn> </mfrac> </mfrac> <mo>&amp;times;</mo> <mi>M</mi> <mi>i</mi> <mi>n</mi> <mi> </mi> <mi>C</mi> <mi>e</mi> <mi>l</mi> <mi>l</mi> <mi> </mi> <mi>S</mi> <mi>O</mi> <mi>C</mi> </mrow>
    Wherein, the Min Cell SOC are the minimum SOC value in each SOC value in each battery core；The Avg Cell SOC is the SOC value that is currently averaged of whole battery cores；
    It is described when the section belonging to the current averagely SOC value of the electric automobile obtained in the step B1 is [0%-15%] Computational methods for the SOC value of display are：
    SOC_DCH5=Min Cell SOC
    Wherein, the Min Cell SOC are the minimum SOC value in each SOC value in each battery core.
  4. 4. according to the method for claim 1, it is characterised in that when detecting the electric automobile currently affiliated work in step A When condition is that parking is charged, the step B includes：
    Obtain each SOC value of each battery core for the battery being arranged in the electric car；And by each SOC value of acquisition Highest SOC value is as the SOC value for being shown on electric vehicle instrument.
  5. 5. according to the method for claim 2, it is characterised in that the B1 also includes：Obtain and set at interval of a specified time Each SOC value of each battery core for the battery being placed in the electric car；And calculate whole battery cores currently averagely SOC value and Obtain the highest SOC value in each battery core in each SOC value and minimum SOC value.
  6. A kind of 6. battery SOC display system of electric automobile, it is characterised in that including：
    Detection module, for detecting the electric automobile currently affiliated operating mode；Wherein, the operating mode includes：Driving and parking are filled Electricity；
    Acquisition module, each SOC value of each battery core for obtaining the battery being arranged in the electric car；And calculate complete Highest SOC value in each SOC value and minimum SOC value in the current averagely SOC value and each battery core of acquisition of portion's battery core；
    Selecting module, for when the detection module detect the electric automobile it is current belonging to operating mode for driving when, according to The current averagely SOC value that the acquisition module obtains judges SOC computational methods of being discharged corresponding to the interval selection belonging to it； And for when the detection module detect the electric automobile it is current belonging to operating mode for parking charging when, by the acquisition Highest SOC value is as the SOC value for showing in the single battery core that module obtains；
    Computing module, the electric discharge SOC computational methods for being selected according to the selecting module obtain the SOC value for display.
    Display module, the SOC value for being used to show is shown by the display unit of the electric automobile.
  7. 7. display system according to claim 6, it is characterised in that also include：
    Time block；Signal is obtained for sending one to the acquisition module at interval of a specified time, is set so that it is obtained Each SOC value of each battery core of battery in the electric car and calculate currently averagely SOC value and obtaining for whole battery cores Take the highest SOC value in each battery core in each SOC value and minimum SOC value.
CN201710743302.1A 2017-08-25 2017-08-25 The battery SOC display methods and system of a kind of electric automobile Pending CN107656209A (en)

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