CN113297284A - Equipment and method for recognizing virtual electricity state of power battery of electric vehicle - Google Patents
Equipment and method for recognizing virtual electricity state of power battery of electric vehicle Download PDFInfo
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- CN113297284A CN113297284A CN202110452962.0A CN202110452962A CN113297284A CN 113297284 A CN113297284 A CN 113297284A CN 202110452962 A CN202110452962 A CN 202110452962A CN 113297284 A CN113297284 A CN 113297284A
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Abstract
The invention discloses a device and a method for identifying the virtual electricity state of an electric vehicle power battery, wherein the device comprises a host and an OBD vehicle-mounted terminal, and the OBD vehicle-mounted terminal comprises an OBD connector, an OBD decoding module, a micro-processing module and a data transmission module which are sequentially connected; the host comprises a data receiving module, a real-time vehicle condition acquisition module, a vehicle condition storage and reading module, a virtual electricity record storage module and a virtual electricity state identification module; the data transmission is carried out between the host and the OBD vehicle-mounted terminal through a data receiving module and a data transmission module; the invention automatically judges whether the battery has a virtual electricity state according to the virtual electricity recognition algorithm by acquiring the battery data in real time, and automatically stores the virtual electricity record, the current battery state and the vehicle state when the virtual electricity occurs. The invention is beneficial to the judgment of the health degree of the power battery and the troubleshooting of the battery.
Description
Technical Field
The invention belongs to the technical field of electric automobile power batteries, and particularly relates to a virtual electricity state identification device and method for an electric automobile power battery.
Background
The virtual electricity of the power battery means that the displayed capacity of the battery is higher than the actual capacity, and the displayed electric quantity is not the real electric quantity of the battery. The method mainly shows that the endurance mileage of the electric automobile is reduced particularly quickly in practical application scenarios. The appearance of the virtual electricity is generally random, no symptom record exists when the virtual electricity appears, the relationship is closely related to the health degree and the charging behavior of the power battery, and the probability of the virtual electricity appearing on the electric automobile with high driving range and unhealthy power battery is high.
The virtual electricity can bring serious influence to driving safety, and general driver can make the stroke planning according to the continuation of the journey mileage that power battery shows before the trip, if meet the condition of virtual electricity, can lead to the vehicle to go on one's road the continuation of the journey mileage sharply reduces, and even the sudden anchoring brings serious potential safety hazard. In addition, when the virtual electricity appears, no data record exists, the scene of the virtual electricity at that time is restored by dictation of a driver, and great inconvenience is brought to later diagnosis and maintenance of a manufacturer.
At present, no definition of quantification of the virtual state and special identification and recording equipment for the virtual state of the power battery exist in the market, the method and the corresponding equipment can automatically detect the virtual state of the power battery and record the virtual state in real time, and great convenience is brought to health monitoring and maintenance of the power battery.
Disclosure of Invention
The invention mainly aims to overcome the defects of the prior art and provide the equipment and the method for identifying the virtual electricity state of the power battery of the electric automobile. The invention is beneficial to the judgment of the health degree of the power battery and the troubleshooting of the battery.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention discloses a virtual electricity state identification device for a power battery of an electric automobile, which comprises a host and an OBD (on-board diagnostics) vehicle-mounted terminal, wherein the OBD vehicle-mounted terminal comprises an OBD connector, an OBD decoding module, a micro-processing module and a data transmission module which are sequentially connected; the host comprises a data receiving module, a real-time vehicle condition acquisition module, a vehicle condition storage and reading module, a virtual electricity record storage module and a virtual electricity state identification module; the data transmission is carried out between the host and the OBD vehicle-mounted terminal through a data receiving module and a data transmission module;
the OBD decoding module is used for decoding the traveling computer data through an OBD protocol to decode battery data of the automobile power battery;
the microprocessor module is used for scheduling the OBD decoding module and the data transmission module, organizing the decoded data according to rules, and outputting the data by the data output module;
the data transmission module is used for transmitting data to the data receiving module in the host computer in a wireless or wired mode;
the data receiving module is used for receiving the OBD decoding data in a wired or wireless mode;
the real-time vehicle condition acquisition module is used for acquiring the state, electric quantity, voltage, current and mileage data of the vehicle in real time through the OBD decoding data uploaded by the OBD vehicle-mounted terminal;
the vehicle condition storage and reading module is used for storing the acquired vehicle condition data and reading the stored historical data as required;
the virtual electricity state identification module is used for identifying whether a virtual electricity state exists according to real-time vehicle condition data and historical vehicle condition data and a virtual electricity identification algorithm;
the virtual electricity record storage module is used for storing the virtual electricity record and the current power battery and vehicle condition data in time after the virtual electricity condition is identified, so that later-stage examination is facilitated.
As a preferred technical scheme, the OBD connector is inserted into an OBD interface of the automobile and used for collecting the running data of the power battery and the running computer.
The OBD connector is a standard trapezoid 16-pin connector as a preferable technical scheme.
The micro-processing module adopts STM32 series chips as a preferable technical scheme.
The data transmission module and the data receiving module adopt a Bluetooth module or a GSM module as a preferable technical scheme.
The virtual electricity state identification module comprises a driving state module, a charging state module and a starting state module;
the driving state module is used for judging whether a driving virtual electricity state exists or not through the difference value between the last stored electric quantity and the current battery capacity when the vehicle drives or idles;
the charging state module is used for judging whether a charging virtual electricity state exists or not according to the ratio of the total charging degree to the theoretical charging degree when the vehicle is charged;
and the starting state module is used for judging whether a parking virtual electricity state exists or not by the difference value between the battery electric quantity stored when the vehicle is shut down last time and the battery electric quantity currently started when the vehicle is started.
The invention also discloses a virtual electricity state identification method of the power battery of the electric automobile, which is applied to the virtual electricity state identification equipment of the power battery of the electric automobile and comprises the following steps:
s0, defining the virtual electric state of the power battery, wherein the virtual electric state comprises:
virtual electricity driving: when the vehicle runs or idles, within five minutes, the SOC of the power battery is reduced to 10 percent;
virtual charging: during charging, the actual charging degree/theoretical charging degree is 80%, wherein the theoretical charging degree is the change value of the battery electric quantity SOC and the nominal energy;
parking virtual electricity: starting after parking, wherein the battery electric quantity SOC when starting-the battery electric quantity SOC when flameout last time is-10%;
s1, acquiring driving computer data and power battery data through the OBD vehicle-mounted terminal;
s2, setting a vehicle running state value S by the real-time vehicle condition acquisition module according to the vehicle condition data;
s3, judging the running state S value of the vehicle by the virtual electricity state identification module;
s31, if S is 1, the vehicle is in a driving or idling state, the virtual electricity state identification module reads the current battery capacity SOC1 once every set time, stores the current SOC1, reads the last stored electricity quantity SOC2, the virtual electricity state identification module determines that SOC2-SOC1> is 10%, if yes, there is a driving virtual electricity state, and the virtual electricity record storage module stores a virtual electricity record, which includes the vehicle state, the current time, the current SOC1, the current mileage, the last time, the last SOC2, and the last mileage; if not, indicating no virtual electricity state;
s32, if S is 2, the vehicle is in a charging state, the virtual electric state identification module calculates a total charging degree P1, reads an electric quantity SOC1 before charging and an electric quantity SOC2 after charging; calculating a theoretical charging degree P2 (SOC2-SOC1) X battery rated energy degree; judging that P1/P2 is 80%, if yes, the virtual electricity record storage module stores a virtual electricity record comprising the vehicle state, the current time, the current mileage, the SOC1 before charging, the SOC2 after charging, the charging degree and the charging time; if not, indicating no virtual electricity state;
s33, if the vehicle is in a starting state, the virtual electricity state recognition module reads the battery electricity quantity SOC1 when the vehicle is started, reads the battery electricity quantity SOC2 stored when the vehicle is shut off last time, and judges that the SOC2-SOC1> is 10%, if yes, the vehicle is in a parking virtual electricity state, and the virtual electricity record storage module stores a virtual electricity record which comprises the vehicle state, the current time, the current mileage, the SOC2 when the vehicle is shut off and the SOC1 when the vehicle is started; and if not, indicating no virtual electricity state.
As a preferable technical solution, in step S31, the virtual battery state identification module reads the current battery capacity once every 5 minutes.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the invention automatically judges whether the battery has a virtual electricity state or not by acquiring the battery data in real time, and automatically stores the virtual electricity record, the current battery state and the vehicle state when the virtual electricity occurs. The invention is beneficial to the judgment of the health degree of the power battery and the troubleshooting of the battery, and is beneficial to the monitoring and troubleshooting of the health degree of the power battery.
2. The invention can overcome the defects that the current driver dictates the virtual electric state and can not record the state at that time.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a block diagram of the virtual electricity state identification device of the power battery of the electric vehicle according to the present invention;
FIG. 2 is a flow chart of the method for identifying the virtual state of the power battery of the electric vehicle.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Examples
As shown in fig. 1, the virtual-electricity state identification device for the power battery of the electric vehicle in the embodiment includes a host and an OBD vehicle-mounted terminal, wherein the OBD vehicle-mounted terminal includes an OBD connector, an OBD decoding module, a microprocessor module, and a data transmission module; the host comprises a data receiving module, a power consumption charging acquisition module, a virtual electricity identification module and a virtual electricity storage module; the OBD vehicle-mounted terminal comprises an OBD decoding module, a micro-processing module and a data transmission module which are sequentially connected; the host comprises a data receiving module, a real-time vehicle condition acquisition module, a vehicle condition storage and reading module, a virtual electricity record storage module and a virtual electricity state identification module; the data transmission is carried out between the host and the OBD vehicle-mounted terminal through a data receiving module and a data transmission module;
the following further describes each functional module of the virtual electricity state identification device of the power battery of the electric vehicle in this embodiment:
the OBD vehicle-mounted terminal: the power battery and the traveling crane computer are inserted into the OBD interface of the automobile to collect the running data of the power battery and the traveling crane computer. Contain the OBD and connect, OBD decoding module, microprocessor module, data transmission module.
The OBD connects: the standard trapezoidal 16-pin connector is inserted into an automobile OBD port and used for collecting automobile driving computer data.
The OBD decoding module: the automobile power battery is responsible for decoding the data of the traveling crane computer through an OBD protocol and decoding battery data such as current, voltage and electric quantity of the automobile power battery.
The micro-processing module: and the OBD decoding module and the data transmission module are responsible for scheduling, organizing the decoded data according to rules, and outputting the data by the data output module. For example, the STM32 series chip from FAW semiconductor.
The data transmission module: and the data receiving module is responsible for outputting data and transmitting the data to the host computer in a wireless or wired mode. Such as a bluetooth module, a GSM module, etc.
The host computer: the intelligent device of the android system is in wired or wireless connection with the OBD vehicle-mounted terminal. The system comprises a data receiving module, a real-time vehicle condition acquisition module, a vehicle condition storage and reading module, a virtual electricity identification module and a virtual electricity record storage module.
The data receiving module: and is responsible for receiving the OBD decoded data in a wired or wireless manner. Such as a bluetooth module, a GSM module, etc.
The real-time vehicle condition acquisition module: the OBD decoding data uploaded by the OBD vehicle-mounted terminal are used for acquiring data such as the state, electric quantity, voltage, current and mileage of the vehicle in real time.
The vehicle condition storage and reading module: on one hand, the collected vehicle condition data are stored, and on the other hand, the stored historical data are read according to requirements.
The virtual electricity identification module: and identifying whether the virtual electricity state exists according to the real-time vehicle condition data and the historical vehicle condition data and a virtual electricity identification algorithm.
Further, the virtual electricity state identification module comprises a driving state module, a charging state module and a starting state module;
the driving state module is used for judging whether a driving virtual electricity state exists or not through the difference value between the last stored electric quantity and the current battery capacity when the vehicle drives or idles;
the charging state module is used for judging whether a charging virtual electricity state exists or not according to the ratio of the total charging degree to the theoretical charging degree when the vehicle is charged;
and the starting state module is used for judging whether a parking virtual electricity state exists or not by the difference value between the battery electric quantity stored when the vehicle is shut down last time and the battery electric quantity currently started when the vehicle is started.
The virtual electricity record storage module: after the virtual electricity condition is identified, the virtual electricity record, the power battery and the vehicle condition data at that time are stored in time, and later-stage examination is facilitated.
As shown in fig. 2, in the method for identifying the virtual electricity state of the power battery of the electric vehicle according to the embodiment, after the driving computer data is acquired through the OBD vehicle-mounted terminal, the virtual electricity state of the power battery is identified and stored according to the following method and flow.
And (3) defining the virtual electricity state of the power battery:
(1) virtual electricity driving: when the vehicle runs or idles for five minutes, the SOC of the power battery is reduced to 10 percent
(2) Virtual charging: during charging, the actual charging degree/theoretical charging degree is 80%, wherein the theoretical charging degree is the change value of the SOC of the battery electric quantity and the nominal energy
(3) Parking virtual electricity: starting after stopping, wherein the battery electric quantity SOC when starting-the battery electric quantity SOC when flameout last time is-10%
The following vehicle and power battery parameters are read and calculated through self-contained storage of the driving computer equipment:
(1) vehicle state S, set to three values: 1, driving; 2-charging; 3-starting;
(2) the electric quantity SOC of the power battery;
(3) the number of charge degrees P.
As shown in fig. 2, the method for identifying the virtual state of the power battery of the electric vehicle according to the present invention is applied to the device for identifying the virtual state of the power battery of the electric vehicle, and includes the following steps:
s1, acquiring driving computer data and power battery data through the OBD vehicle-mounted terminal;
s2, setting a vehicle running state value S by the real-time vehicle condition acquisition module according to the vehicle condition data;
s3, judging the running state S value of the vehicle by the virtual electricity state identification module;
s31, if S is 1, the vehicle is in a driving or idling state, the virtual electricity state identification module reads the current battery capacity SOC1 once every 5 minutes, stores the current SOC1, reads the last stored electricity quantity SOC2, the virtual electricity state identification module determines that SOC2-SOC1> is 10%, if yes, the vehicle has a driving virtual electricity state, and the virtual electricity record storage module stores a virtual electricity record, which includes the vehicle state, the current time, the current SOC1, the current mileage, the last time, the last SOC2, and the last mileage; if not, indicating no virtual electricity state;
s32, if S is 2, the vehicle is in a charging state, the virtual electric state identification module calculates a total charging degree P1, reads an electric quantity SOC1 before charging and an electric quantity SOC2 after charging; calculating a theoretical charging degree P2 (SOC2-SOC1) X battery rated energy degree; judging that P1/P2 is 80%, if yes, the virtual electricity record storage module stores a virtual electricity record comprising the vehicle state, the current time, the current mileage, the SOC1 before charging, the SOC2 after charging, the charging degree and the charging time; if not, indicating no virtual electricity state;
s33, if the vehicle is in a starting state, the virtual electricity state recognition module reads the battery electricity quantity SOC1 when the vehicle is started, reads the battery electricity quantity SOC2 stored when the vehicle is shut off last time, and judges that the SOC2-SOC1> is 10%, if yes, the vehicle is in a parking virtual electricity state, and the virtual electricity record storage module stores a virtual electricity record which comprises the vehicle state, the current time, the current mileage, the SOC2 when the vehicle is shut off and the SOC1 when the vehicle is started; and if not, indicating no virtual electricity state.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (8)
1. The electric vehicle power battery virtual electricity state identification equipment is characterized by comprising a host and an OBD vehicle-mounted terminal, wherein the OBD vehicle-mounted terminal comprises an OBD connector, an OBD decoding module, a micro-processing module and a data transmission module which are sequentially connected; the host comprises a data receiving module, a real-time vehicle condition acquisition module, a vehicle condition storage and reading module, a virtual electricity record storage module and a virtual electricity state identification module; the data transmission is carried out between the host and the OBD vehicle-mounted terminal through a data receiving module and a data transmission module;
the OBD decoding module is used for decoding the traveling computer data through an OBD protocol to decode battery data of the automobile power battery;
the microprocessor module is used for scheduling the OBD decoding module and the data transmission module, organizing the decoded data according to rules, and outputting the data by the data output module;
the data transmission module is used for transmitting data to the data receiving module in the host computer in a wireless or wired mode;
the data receiving module is used for receiving the OBD decoding data in a wired or wireless mode;
the real-time vehicle condition acquisition module is used for acquiring the state, electric quantity, voltage, current and mileage data of the vehicle in real time through the OBD decoding data uploaded by the OBD vehicle-mounted terminal;
the vehicle condition storage and reading module is used for storing the acquired vehicle condition data and reading the stored historical data as required;
the virtual electricity state identification module is used for identifying whether a virtual electricity state exists according to real-time vehicle condition data and historical vehicle condition data and a virtual electricity identification algorithm;
the virtual electricity record storage module is used for storing the virtual electricity record and the current power battery and vehicle condition data in time after the virtual electricity condition is identified, so that later-stage examination is facilitated.
2. The electric vehicle power battery virtual current state identification equipment according to claim 1, wherein the OBD connector is plugged on a vehicle OBD interface to collect operation data of the power battery and a running computer.
3. The electric vehicle power battery virtual electricity state identification equipment of claim 2, characterized in that, the OBD joint is a standard trapezoidal 16-pin joint.
4. The virtual electric state identification device of the power battery of the electric automobile as claimed in claim 1, wherein the micro-processing module adopts STM32 series chips.
5. The device for identifying the virtual state of the power battery of the electric automobile according to claim 1, wherein the data transmission module and the data receiving module adopt a Bluetooth module or a GSM module.
6. The electric vehicle power battery virtual electricity state identification device according to claim 1, wherein the virtual electricity state identification module comprises a driving state module, a charging state module and a starting state module;
the driving state module is used for judging whether a driving virtual electricity state exists or not through the difference value between the last stored electric quantity and the current battery capacity when the vehicle drives or idles;
the charging state module is used for judging whether a charging virtual electricity state exists or not according to the ratio of the total charging degree to the theoretical charging degree when the vehicle is charged;
and the starting state module is used for judging whether a parking virtual electricity state exists or not by the difference value between the battery electric quantity stored when the vehicle is shut down last time and the battery electric quantity currently started when the vehicle is started.
7. The method for identifying the virtual state of the power battery of the electric automobile is applied to the equipment for identifying the virtual state of the power battery of the electric automobile in any one of claims 1 to 6, and comprises the following steps:
s0, defining the virtual electric state of the power battery, wherein the virtual electric state comprises:
virtual electricity driving: when the vehicle runs or idles, within five minutes, the SOC of the power battery is reduced to 10 percent;
virtual charging: during charging, the actual charging degree/theoretical charging degree is 80%, wherein the theoretical charging degree is the change value of the battery electric quantity SOC and the nominal energy;
parking virtual electricity: starting after parking, wherein the battery electric quantity SOC when starting-the battery electric quantity SOC when flameout last time is-10%;
s1, acquiring driving computer data and power battery data through the OBD vehicle-mounted terminal;
s2, setting a vehicle running state value S by the real-time vehicle condition acquisition module according to the vehicle condition data;
s3, judging the running state S value of the vehicle by the virtual electricity state identification module;
s31, if S is equal to 1, the vehicle is in a driving state, the virtual electricity state recognition module reads the current battery capacity SOC1 once every set time, stores the current SOC1, reads the last stored electricity quantity SOC2, and judges that SOC2-SOC1> is equal to 10%, if yes, the vehicle has a driving virtual electricity state, and the virtual electricity record storage module stores a virtual electricity record which comprises the vehicle state, the current time, the current SOC1, the current mileage, the last time, the last SOC2 and the last mileage; if not, indicating no virtual electricity state;
s32, if S is 2, the vehicle is in a charging state, the virtual electric state identification module calculates a total charging degree P1, reads an electric quantity SOC1 before charging and an electric quantity SOC2 after charging; calculating a theoretical charging degree P2 (SOC2-SOC1) X battery rated energy degree; judging that P1/P2 is 80%, if yes, the virtual electricity record storage module stores a virtual electricity record comprising the vehicle state, the current time, the current mileage, the SOC1 before charging, the SOC2 after charging, the charging degree and the charging time; if not, indicating no virtual electricity state;
s33, if the vehicle is in a starting state, the virtual electricity state recognition module reads the battery electricity quantity SOC1 when the vehicle is started, reads the battery electricity quantity SOC2 stored when the vehicle is shut off last time, and judges that the SOC2-SOC1> is 10%, if yes, the vehicle is in a parking virtual electricity state, and the virtual electricity record storage module stores a virtual electricity record which comprises the vehicle state, the current time, the current mileage, the SOC2 when the vehicle is shut off and the SOC1 when the vehicle is started; and if not, indicating no virtual electricity state.
8. The method for recognizing the virtual battery state of the power battery of the electric vehicle as claimed in claim 7, wherein in step S31, the virtual battery state recognition module reads the current battery capacity once every 5 minutes.
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| CN115542160A (en) * | 2022-12-05 | 2022-12-30 | 南京模砾半导体有限责任公司 | Battery virtual electricity detection device and method |
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