CN102590757A - Method and device for diagnosing battery level - Google Patents
Method and device for diagnosing battery level Download PDFInfo
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- CN102590757A CN102590757A CN2012100357081A CN201210035708A CN102590757A CN 102590757 A CN102590757 A CN 102590757A CN 2012100357081 A CN2012100357081 A CN 2012100357081A CN 201210035708 A CN201210035708 A CN 201210035708A CN 102590757 A CN102590757 A CN 102590757A
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Abstract
The invention discloses a method and a device for diagnosing battery level, belonging to the field of automobile electronic control. The method comprises the steps of: acquiring pulse width modulation PWM load information of a power generator; acquiring a preset low battery threshold value for judging the PWM load information of the power generator; and according to the PWM load information of the power generator, the low battery threshold value and the current battery voltage, diagnosing if the current battery level meets the battery level for starting an automobile engine. According to the method, the current battery level is judged whether to meet the engine starting condition or not by the preset low battery threshold value for judging the PWM load information of the power generator, the PWM load information of the power generator and the current battery voltage. The aim of the judgment of the engine start-stop control on the battery level can be realized without the addition of other equipment is achieved, and the cost is saved, so that the technology can be generally applied to automobiles.
Description
Technical field
The present invention relates to the Vehicle Electronic Control field, particularly a kind of method and apparatus of diagnosing battery electric quantity.
Background technology
Along with developing of automobile industry, China increases by first big country as automobile, and under the soaring day by day trend of global warming and world petroleum price, energy-saving and emission-reduction have become the emphasis of present auto industry research and development.Effective and the technology maturation of present motor car engine start and stop control technology; When this function mainly is adapted to wait for signal lamp or traffic congestion in the urban transportation; Can reduce the engine idle idle period as far as possible, can reduce unnecessary fuel consume, reduce discharging and improve fuel economy.
Owing to adopted engine start and stop control technology, so automobile starts the start and stop control technology if desired to control the engine oil-break flame-out when stopping, and it is just passable then to need to guarantee there is the electric weight of engine start in the battery in the automobile.In the start and stop control system, come electric weight is measured in the prior art through the accumulator sensor, if measure the electric weight that electric weight in the battery is accomplished engine start inadequately, then not when automobile stops with tail-off.
In realizing process of the present invention, the inventor finds that there is following problem at least in prior art:
Use of the measurement of accumulator sensor at present to battery status; Because motor car engine start and stop control technology does not need accurate especially for the measurement of battery electric quantity; And the cost of accumulator sensor is higher relatively; Therefore the start and stop control technology only applies to can not popularize the technology of this raising fuel economy on the automobile of relative higher cost.
Summary of the invention
In order to reduce the use cost of engine start and stop technology, the embodiment of the invention provides a kind of method and apparatus of diagnosing battery electric quantity.Said technical scheme is following:
The embodiment of the invention has proposed a kind of method of diagnosing battery electric quantity, comprising:
Obtain the pulse width modulation (PWM) load information of generator;
Obtain the low electric weight threshold value of the PWM load information that preset being used to judge said generator;
Obtain the current voltage of battery;
According to the PWM load information of said generator, said low electric weight threshold value and the current voltage of said battery diagnose the current electric weight of said battery whether to satisfy the electric weight of automobile engine starting.
Preferred as technique scheme, the said PWM load information that obtains generator specifically comprises:
Whether current have consumer work, if the PWM load information of the consumer compensated dynamo that has consumer working then to obtain preset work at present if judging;
Receive the current PWM load information of generator that generator sends;
With the PWM load information and the current PWM load information addition of said generator of said consumer compensated dynamo, and carry out filtering, obtain the said PWM load information that is used to diagnose the generator of battery electric quantity through wave filter.
Preferred as technique scheme, the said low electric weight threshold value of obtaining the PWM load information that preset being used to judge said generator specifically comprises:
Obtain the current rotating speed of engine;
According to the preset engine speed and the corresponding relation of low electric weight threshold value, obtain the corresponding said low electric weight threshold value of the current rotating speed of said engine.
Preferred as technique scheme, said PWM load information according to said generator, said low electric weight threshold value and the current voltage of said battery diagnose the current electric weight of said battery whether to satisfy the electric weight of automobile engine starting, specifically comprise:
Judge the PWM load information of said generator and the size of said low electric weight threshold value;
If the PWM load information of said generator is less than the size of said low electric weight threshold value, and the current voltage of said battery then diagnoses said battery current electric quantity low less than preset value, can't reach the required electric weight of automobile engine starting.
The embodiment of the invention has also proposed a kind of device of diagnosing battery electric quantity, comprising:
First acquisition module is used to obtain the pulse width modulation (PWM) load information of generator;
Second acquisition module is used to obtain the low electric weight threshold value of the PWM load information that preset being used to judge said generator;
The 3rd acquisition module is used to obtain the current voltage of battery;
Diagnostic module is used for the PWM load information according to said generator, and said low electric weight threshold value and the current voltage of said battery diagnose the current electric weight of said battery whether to satisfy the electric weight of automobile engine starting.
Preferred as technique scheme, said first acquisition module specifically comprises:
First processing unit, whether current have consumer work, if the PWM load information of the consumer compensated dynamo that has consumer working then to obtain preset work at present if being used to judge;
Receiving element is used to receive the current PWM load information of generator that generator sends;
Second processing unit is used for PWM load information and the current PWM load information addition of said generator with said consumer compensated dynamo, and carries out filtering through wave filter, obtains the said PWM load information that is used to diagnose the generator of battery electric quantity.
Preferred as technique scheme, said second acquisition module specifically comprises:
First acquiring unit is used to obtain the current rotating speed of engine;
Second acquisition unit is used for according to the preset engine speed and the corresponding relation of low electric weight threshold value, obtains the corresponding said low electric weight threshold value of the current rotating speed of said engine.
Preferred as technique scheme, said diagnostic module specifically comprises:
Judging unit is used to judge the PWM load information of said generator and the size of said low electric weight threshold value;
Diagnosis unit, be used for if the PWM load information of said generator less than the size of said low electric weight threshold value, and the current voltage of said battery then diagnoses said battery current electric quantity low less than preset value, can't reach the required electric weight of automobile engine starting.
The beneficial effect that the technical scheme that the embodiment of the invention provides is brought is: the low electric weight threshold value of judging the PWM load information of generator through preset being used to; The PWM load information of generator and the voltage of current battery judge whether the electric weight of current battery satisfies the condition of starting engine.Having reached does not increase additional apparatus and can realize the engine start and stop control judgement purpose to battery electric quantity, practiced thrift cost make this technology can widespread usage and automobile on.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of the method for the diagnosis battery electric quantity that provides in the embodiment of the invention 1;
Fig. 2 is the schematic flow sheet of the method for the diagnosis battery electric quantity that provides in the embodiment of the invention 2;
Fig. 3 is the structural representation of the device of the diagnosis battery electric quantity that provides in the embodiment of the invention 3.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that embodiment of the present invention is done to describe in detail further below.
Embodiment 1
Referring to Fig. 1, the embodiment of the invention provides a kind of method of diagnosing battery electric quantity, comprising:
Step 101: the pulse width modulation (PWM) load information that obtains generator;
Step 102: the low electric weight threshold value of obtaining the PWM load information that preset being used to judge said generator;
Step 103: obtain the current voltage of battery;
Step 104: according to the PWM load information of said generator, said low electric weight threshold value and the current voltage of said battery diagnose the current electric weight of said battery whether to satisfy the electric weight of automobile engine starting.
The embodiment of the invention is judged the low electric weight threshold value of the PWM load information of generator through preset being used to, and the PWM load information of generator and the voltage of current battery judge whether the electric weight of current battery satisfies the condition of starting engine.Having reached does not increase additional apparatus and can realize the engine start and stop control judgement purpose to battery electric quantity, practiced thrift cost make this technology can widespread usage and automobile on.
Embodiment 2
Referring to Fig. 2, the embodiment of the invention provides a kind of method of diagnosing battery electric quantity, comprising:
Step 201: the PWM load information that obtains the generator of diagnosis battery electric quantity.
The ECU of automobile (Flectronic Control Unit; Electronic control unit) receives current PWM (the Pulse Width Modulation that generator sends; Pulse-length modulation) load information; Utilize the PWM load information of generator, under the fixed rotating speed, it is different with the not enough corresponding generator PWM load information of electric weight that battery electric quantity is full of.Simultaneously, also need consider of the influence of consumer load-factor, can demarcate the generator loading PWM information when battery electric quantity is not enough generator PWM load information.Thereby relatively this information and current actual generator load P WM information are judged the state of current battery.
Further, because the start and stop control technology of engine only need be known the state of battery to the requirement of battery,, electric weight then can kill engine when stopping in that automobile is of short duration when satisfying the required electric weight of engine start and stop.Therefore, diagnosing the purpose of the state of current battery then is the electric weight whether current electric weight of diagnosis battery satisfies automobile engine starting.
Obtain the PWM load information of the generator of diagnosis battery electric quantity, constitute by two parts information.First's signal is the current PWM load information of generator that the generator of electronic controller formula provides to ECU; The second portion signal is that current consumer is a purpose with the burning voltage, needs the PWM load information of compensated dynamo.Because consumer is not one to fix on use, so ECU need judge current consumer, and the compensation of the consumer that is using to generator PWM load information counted.Wherein, generator PWM load information is the dutycycle of generator, and dutycycle is along with the output of generator changes and changes, and dutycycle is big during underloading, and dutycycle is little during heavy duty, and the full load dutycycle is 0.
Therefore step 201 can be specially:
Whether step 2011: judging currently has consumer to work, if the PWM load information of the consumer compensated dynamo that has consumer working then to obtain preset work at present.
Concrete, consumer can be electrical equipments such as headlight, air-conditioning, fan.Wherein, the PWM load information of the compensated dynamo that each consumer is corresponding is according to calculating good in advance and being kept among the ECU.The signal that ECU is working through the consumer that has obtained judges that this consumer uses, and obtains the corresponding PWM load information that needs compensated dynamo of consumer of work at present respectively.If current do not have a consumer, the PWM load information that then needs compensated dynamo is 0.
Step 2012: receive the current PWM load information of generator that generator sends.
The generator of electronic controller formula is sent to ECU with current PWM load information.
Step 2013: with the PWM load information and the current PWM load information addition of said generator of said consumer compensated dynamo, and carry out filtering, obtain the said PWM load information that is used to diagnose the generator of battery electric quantity through wave filter.
The PWM load information and the current PWM load information addition of generator of the consumer compensated dynamo that step 2011 and step 2012 are obtained; And carry out filtering through wave filter; After erasure signal disturbs the influence to load calculation, obtain being used to diagnosing the PWM load information of the generator of battery electric quantity.
Step 202: the low electric weight threshold value of obtaining the PWM load information that preset being used to judge said generator.
Preset be used to judge that the low electric weight threshold value of the PWM load information of said generator is a curve relevant with engine speed.Because under the fixed rotating speed; It is different with the not enough corresponding generator PWM load information of electric weight that battery electric quantity is full of; For example: as shown in Figure 3, two curves are respectively battery electric quantity curve corresponding with engine speed when the curve corresponding with engine speed and battery electric quantity are not enough when being full of.This curve is different according to the result of different batteries in the different automobiles and different generator measurement; Therefore the song of preset low electric weight threshold value will be according to employed different generators of automobile and battery; Need demarcate measuring and calculating respectively, be under the situation that consumers such as headlight, air-conditioning, fan are not opened, to demarcate to obtain.
Because curve carries out correspondence according to engine speed, therefore need obtain the current rotating speed of engine.Step 202 can be specially:
Step 2021: obtain the current rotating speed of engine;
Step 2022:, obtain the corresponding said low electric weight threshold value of the current rotating speed of said engine according to the preset engine speed and the corresponding relation of low electric weight threshold value.
Step 203: obtain the current voltage of battery.
Step 204: according to the PWM load information of said generator, said low electric weight threshold value and the current voltage of said battery diagnose the current electric weight of said battery whether to satisfy the electric weight of automobile engine starting.
When the PWM of generator load information during, explain that current generator is not enough to the electric power thus supplied of battery less than low electric weight threshold value.If the voltage of inside battery is not if satisfy preset value at this moment, can judge that then the electric weight of this battery is not enough, can't reach the required electric weight of automobile engine starting.Preferably, the voltage preset value that battery is current is made as and is lower than 11V, is the standard of judging that this battery electric quantity is not enough.
Therefore step 204 can be specially:
Step 2041: judge the PWM load information of said generator and the size of said low electric weight threshold value;
Step 2042: if the PWM load information of said generator is less than the size of said low electric weight threshold value, and the current voltage of said battery then diagnoses said battery current electric quantity low less than preset value, can't reach the required electric weight of automobile engine starting.
The embodiment of the invention is judged the low electric weight threshold value of the PWM load information of generator through preset being used to, and the PWM load information of generator and the voltage of current battery judge whether the electric weight of current battery satisfies the condition of starting engine.Having reached does not increase additional apparatus and can realize the engine start and stop control judgement purpose to battery electric quantity, practiced thrift cost make this technology can widespread usage and automobile on.
Embodiment 3
Referring to Fig. 3, the embodiment of the invention provides a kind of device of diagnosing battery electric quantity, comprising:
Need to prove that the device in the embodiment of the invention can correspond to the ECU module in the automobile.
First acquisition module 301 is used to obtain the pulse width modulation (PWM) load information of generator;
Second acquisition module 302 is used to obtain the low electric weight threshold value of the PWM load information that preset being used to judge said generator;
The 3rd acquisition module 303 is used to obtain the current voltage of battery;
Diagnostic module 304 is used for the PWM load information according to said generator, and said low electric weight threshold value and the current voltage of said battery diagnose the current electric weight of said battery whether to satisfy the electric weight of automobile engine starting.
In embodiment, said first acquisition module 301 specifically comprises:
First processing unit 3011, whether current have consumer work, if the PWM load information of the consumer compensated dynamo that has consumer working then to obtain preset work at present if being used to judge;
Receiving element 3012 is used to receive the current PWM load information of generator that generator sends;
Second processing unit 3013; Be used for PWM load information and the current PWM load information addition of said generator with said consumer compensated dynamo; And carry out filtering through wave filter, obtain the said PWM load information that is used to diagnose the generator of battery electric quantity.
Said second acquisition module 302 specifically comprises:
First acquiring unit 3021 is used to obtain the current rotating speed of engine;
Second acquisition unit 3022 is used for according to the preset engine speed and the corresponding relation of low electric weight threshold value, obtains the corresponding said low electric weight threshold value of the current rotating speed of said engine.
Said diagnostic module 304 specifically comprises:
Judging unit 3041 is used to judge the PWM load information of said generator and the size of said low electric weight threshold value;
Diagnosis unit 3042, be used for if the PWM load information of said generator less than the size of said low electric weight threshold value, and the current voltage of said battery then diagnoses said battery current electric quantity low less than preset value, can't reach the required electric weight of automobile engine starting.
The embodiment of the invention is judged the low electric weight threshold value of the PWM load information of generator through preset being used to, and the PWM load information of generator and the voltage of current battery judge whether the electric weight of current battery satisfies the condition of starting engine.Having reached does not increase additional apparatus and can realize the engine start and stop control judgement purpose to battery electric quantity, practiced thrift cost make this technology can widespread usage and automobile on.
The all or part of step that one of ordinary skill in the art will appreciate that realization the foregoing description can be accomplished through hardware; Also can instruct relevant hardware to accomplish through program; Described program can be stored in a kind of computer-readable recording medium; The above-mentioned storage medium of mentioning can be a ROM (read-only memory), disk or CD etc.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a method of diagnosing battery electric quantity is characterized in that, said method comprises:
Obtain the pulse width modulation (PWM) load information of generator;
Obtain the low electric weight threshold value of the PWM load information that preset being used to judge said generator;
Obtain the current voltage of battery;
According to the PWM load information of said generator, said low electric weight threshold value and the current voltage of said battery diagnose the current electric weight of said battery whether to satisfy the electric weight of automobile engine starting.
2. method according to claim 1 is characterized in that, the said PWM load information that obtains generator specifically comprises:
Whether current have consumer work, if the PWM load information of the consumer compensated dynamo that has consumer working then to obtain preset work at present if judging;
Receive the current PWM load information of generator that generator sends;
With the PWM load information and the current PWM load information addition of said generator of said consumer compensated dynamo, and carry out filtering, obtain the said PWM load information that is used to diagnose the generator of battery electric quantity through wave filter.
3. method according to claim 1 is characterized in that, the said low electric weight threshold value of obtaining the PWM load information that preset being used to judge said generator specifically comprises:
Obtain the current rotating speed of engine;
According to the preset engine speed and the corresponding relation of low electric weight threshold value, obtain the corresponding said low electric weight threshold value of the current rotating speed of said engine.
4. according to claim 2 and 3 described methods; It is characterized in that said PWM load information, said low electric weight threshold value and the current voltage of said battery according to said generator; Diagnose the current electric weight of said battery whether to satisfy the electric weight of automobile engine starting, specifically comprise:
Judge the PWM load information of said generator and the size of said low electric weight threshold value;
If the PWM load information of said generator is less than the size of said low electric weight threshold value, and the current voltage of said battery then diagnoses said battery current electric quantity low less than preset value, can't reach the required electric weight of automobile engine starting.
5. a device of diagnosing battery electric quantity is characterized in that, said device comprises:
First acquisition module is used to obtain the pulse width modulation (PWM) load information of generator;
Second acquisition module is used to obtain the low electric weight threshold value of the PWM load information that preset being used to judge said generator;
The 3rd acquisition module is used to obtain the current voltage of battery;
Diagnostic module is used for the PWM load information according to said generator, and said low electric weight threshold value and the current voltage of said battery diagnose the current electric weight of said battery whether to satisfy the electric weight of automobile engine starting.
6. device according to claim 5 is characterized in that, said first acquisition module specifically comprises:
First processing unit, whether current have consumer work, if the PWM load information of the consumer compensated dynamo that has consumer working then to obtain preset work at present if being used to judge;
Receiving element is used to receive the current PWM load information of generator that generator sends;
Second processing unit is used for PWM load information and the current PWM load information addition of said generator with said consumer compensated dynamo, and carries out filtering through wave filter, obtains the said PWM load information that is used to diagnose the generator of battery electric quantity.
7. device according to claim 5 is characterized in that, said second acquisition module specifically comprises:
First acquiring unit is used to obtain the current rotating speed of engine;
Second acquisition unit is used for according to the preset engine speed and the corresponding relation of low electric weight threshold value, obtains the corresponding said low electric weight threshold value of the current rotating speed of said engine.
8. according to claim 6 and 7 described devices, it is characterized in that said diagnostic module specifically comprises:
Judging unit is used to judge the PWM load information of said generator and the size of said low electric weight threshold value;
Diagnosis unit, be used for if the PWM load information of said generator less than the size of said low electric weight threshold value, and the current voltage of said battery then diagnoses said battery current electric quantity low less than preset value, can't reach the required electric weight of automobile engine starting.
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| CN201210035708.1A CN102590757B (en) | 2012-02-16 | 2012-02-16 | Method and device for diagnosing battery level |
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| CN201210035708.1A CN102590757B (en) | 2012-02-16 | 2012-02-16 | Method and device for diagnosing battery level |
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Cited By (1)
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| CN111596214A (en) * | 2020-06-02 | 2020-08-28 | 安徽江淮汽车集团股份有限公司 | Engine battery energy diagnostic method and system |
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| US20090189570A1 (en) * | 2008-01-28 | 2009-07-30 | Denso Corporation | Vehicle control system capable of controlling electric-power generation state of vehicle alternator |
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| US20090189570A1 (en) * | 2008-01-28 | 2009-07-30 | Denso Corporation | Vehicle control system capable of controlling electric-power generation state of vehicle alternator |
| CN101318489A (en) * | 2008-05-07 | 2008-12-10 | 中国科学院电工研究所 | Vehicle mounted battery management system control method |
| CN101330696A (en) * | 2008-07-29 | 2008-12-24 | 中兴通讯股份有限公司 | Method and apparatus for managing terminal equipment battery electric quantity |
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