CN114720900A - Method and device for determining battery health state and electronic equipment - Google Patents
Method and device for determining battery health state and electronic equipment Download PDFInfo
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- CN114720900A CN114720900A CN202210325352.9A CN202210325352A CN114720900A CN 114720900 A CN114720900 A CN 114720900A CN 202210325352 A CN202210325352 A CN 202210325352A CN 114720900 A CN114720900 A CN 114720900A
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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]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
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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
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The invention provides a method and a device for determining the health state of a battery and electronic equipment, which relate to the technical field of battery pack application and comprise the following steps: determining annual battery capacity attenuation, annual driving mileage and mileage corresponding to each ampere-hour discharge capacity of a battery of the current vehicle based on a preset quality and protection standard; determining the traveled mileage and the unlawn mileage of the current vehicle under a preset quality and protection standard according to the target quality and protection standard of the current vehicle and the annual traveled mileage; determining a first capacity attenuation corresponding to the traveled mileage according to a target quality and protection standard and the annual battery capacity attenuation of the current vehicle; determining a second capacity attenuation under the cyclic endurance working condition according to the number of miles not driven and the number of miles corresponding to the discharge capacity of the battery per ampere hour; the battery health state of the current vehicle under the target quality assurance standard is determined based on the first capacity attenuation and the second capacity attenuation, the battery health state meeting various quality assurance requirements is obtained accurately, and the battery health state can be used as a detection index for various scene applications.
Description
Technical Field
The invention relates to the technical field of battery pack application, in particular to a method and a device for determining the health state of a battery and electronic equipment.
Background
With the development of vehicle technology, electric vehicles are widely used in current daily life, and regulations and schemes for quality assurance have been provided in the links of vehicle production, sales, after-sales maintenance and the like.
However, the inventor researches and finds that the vehicle battery has higher application requirements nowadays, that is, based on the original quality assurance standard, the vehicle needs to be additionally ensured to reach the corresponding battery health state in some specific service life so as to meet the current application requirements. Therefore, how to determine the health status of the battery more accurately to meet more quality assurance requirements becomes a problem to be solved urgently.
Disclosure of Invention
In view of this, the present invention provides a method and an apparatus for determining a battery health status, and an electronic device, which can accurately obtain the battery health status meeting various quality assurance requirements, and are convenient to be used as detection indexes in various applications.
In a first aspect, an embodiment provides a method for determining a state of health of a battery, the method including:
determining the annual battery capacity attenuation, annual driving mileage and mileage corresponding to the battery discharge capacity per ampere hour of the current vehicle based on a preset quality and protection standard;
determining the traveled mileage and the unlawn mileage of the current vehicle under the preset quality and protection standard according to the target quality and protection standard of the current vehicle and the annual traveled mileage;
determining a first capacity attenuation corresponding to the traveled mileage according to the target quality and guarantee standard and the annual battery capacity attenuation of the current vehicle;
determining a second capacity attenuation under the circulation endurance working condition according to the number of miles not driven and the number of miles corresponding to the discharge capacity of the battery per ampere hour;
determining a battery state of health of the current vehicle under the target warranty criterion based on the first and second capacity attenuations.
In some embodiments, the step of determining the traveled miles and the unlawn miles of the current vehicle under the preset warranty standard according to the target warranty standard of the current vehicle and the miles traveled per year includes:
determining the traveled mileage of the current vehicle under the preset quality and protection standard according to the product of the target service life in the target quality and protection standard of the current vehicle and the traveled mileage per year;
and determining the unlawn mileage of the current vehicle under the preset quality and protection standard based on the difference value between the target driving mileage in the target quality and protection standard of the current vehicle and the driven mileage.
In some embodiments, the step of determining a second capacity fade under a cycling endurance operating condition based on the unlawn mileage and the mileage corresponding to the discharge capacity per ampere-hour of the battery comprises:
determining the discharge capacity corresponding to the unlawn mileage according to the ratio of the unlawn mileage to the mileage corresponding to the battery discharge capacity per ampere hour;
and determining a second capacity fade under the cyclic endurance working condition according to the discharge capacity.
In some embodiments, the step of determining a second capacity fade under a cycling endurance operating condition based on the discharge capacity comprises:
substituting the discharge capacity into the following equation to determine a second capacity fade under cyclic endurance conditions:
wherein Q isCycleFor the second capacity fade, A, Z, Ea is the calibration factor, Ah is the discharge capacity, and T is the temperature.
In some embodiments, the method comprises:
the battery quality of the vehicle at a target age is detected based on the battery state of health.
In some embodiments, the predetermined warranty criteria include a predetermined age, a predetermined number of miles driven, and a predetermined battery state of health; based on the preset quality and protection standard, determining the annual battery capacity attenuation, annual driving mileage and mileage corresponding to the battery discharge capacity per ampere hour of the current vehicle, wherein the steps comprise:
determining the mileage of each year according to the preset service life and the preset running kilometers;
determining the annual battery capacity attenuation of the current vehicle according to the preset battery health state and the preset service life;
and determining the mileage corresponding to the discharge capacity of the current vehicle per ampere hour according to the discharge capacity of the current vehicle under the cyclic endurance working condition and the preset running kilometer number.
In some embodiments, the target warranty criteria include a target age of 3 years and a target miles traveled of 10 kilometers, a target age of 3 years and a target miles traveled of 12 kilometers, a target age of 3 years and a target miles traveled of 20 kilometers, a target age of 10 years and a target miles traveled of 20 kilometers.
In a second aspect, an embodiment provides an apparatus for determining a state of health of a battery, the apparatus including:
the first determination module is used for determining annual battery capacity attenuation, annual driving mileage and mileage corresponding to battery discharge capacity per ampere hour of the current vehicle based on a preset quality and protection standard;
the second determining module is used for determining the traveled mileage and the unlawn mileage of the current vehicle under the preset quality and protection standard according to the target quality and protection standard of the current vehicle and the annual traveled mileage;
the third determining module is used for determining a first capacity attenuation corresponding to the traveled mileage according to the target quality and guarantee standard and the annual battery capacity attenuation of the current vehicle;
the fourth determining module is used for determining second capacity attenuation under the circulation endurance working condition according to the number of miles not driven and the number of miles corresponding to the discharge capacity of the battery per ampere hour;
a fifth determination module that determines a battery state of health of the current vehicle under the target warranty criterion based on the first and second capacity attenuations.
In a third aspect, an embodiment provides an electronic device, including a memory and a processor, where the memory stores a computer program operable on the processor, and the processor implements the steps of the method described in any one of the foregoing embodiments when executing the computer program.
In a fourth aspect, embodiments provide a machine-readable storage medium having stored thereon machine-executable instructions that, when invoked and executed by a processor, cause the processor to carry out the steps of the method of any preceding embodiment.
The method, the device and the electronic equipment for determining the battery health state provided by the embodiment of the invention determine the annual battery capacity attenuation, the annual driving mileage and the mileage corresponding to the discharge capacity per ampere hour of the battery corresponding to the current vehicle through the preset quality guarantee standard of the current vehicle, calculate the driven mileage and the unmet unfurled mileage of the current vehicle according to the preset quality guarantee standard according to the requirement of the target quality guarantee standard, respectively calculate the first capacity attenuation corresponding to the driven mileage and the second capacity attenuation corresponding to the unfurled mileage still required to be met under the cyclic endurance working condition, and can determine the battery health state meeting the target quality guarantee standard based on the first capacity attenuation and the second capacity attenuation, so that the battery health state corresponding to various target quality guarantee standards can be more accurately determined, and the index is used as a quality assurance index applied in various industry fields.
Additional features and advantages of the disclosure will be set forth in the description which follows, or in part may be learned by the practice of the above-described techniques of the disclosure, or may be learned by practice of the disclosure.
In order to make the aforementioned objects, features and advantages of the present disclosure more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a method for determining a state of health of a battery according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an application process of a cyclic endurance condition according to an embodiment of the present invention;
fig. 3 is a functional block diagram of a battery state of health determination apparatus according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a hardware architecture of an electronic device according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
With the development of vehicle technology and the pursuit of vehicle safety, the battery quality assurance standard of the electric vehicle may be gradually updated. At present, a new battery quality assurance standard is developed, how to accurately detect the battery health state of a vehicle so as to judge whether the battery health state meets the battery quality assurance standard or how to determine the battery health state meeting the battery quality assurance standard, and the battery health state is used as the standard of judging batteries in various industry application fields. For example, a vehicle seller uses an accurate battery health status parameter value that the vehicle can satisfy as a selling point to attract more customers, and a vehicle maintenance 4S shop accurately detects the battery health status of a vehicle to be maintained to determine whether the vehicle to be maintained meets the quality assurance requirements, and meanwhile, the benefits of both the maintenance shop and the vehicle user are guaranteed.
Based on this, the method and the device for determining the battery health state and the electronic device provided by the embodiment of the invention can solve the problem that the accurate battery health state cannot be determined according to various different warranty requirements in the prior art.
For the convenience of understanding of the present embodiment, a detailed description will be given first of all on a determination method based on a battery state of health, which is disclosed in the embodiment of the present invention and can be applied to a controller, a vehicle management system, a battery management system, a motor controller, and other intelligent devices.
Fig. 1 is a flowchart of a method for determining a state of health of a battery according to an embodiment of the present invention.
As shown in fig. 1, the method comprises the steps of:
and S102, determining the annual battery capacity attenuation, annual driving mileage and mileage corresponding to the battery discharge capacity per ampere hour of the current vehicle based on a preset quality guarantee standard.
The predetermined warranty standard can be understood as an existing historical warranty standard, and if the current vehicle needs to meet the requirement that the vehicle runs for 15 kilometers in the course of 8 years of service life, the state of health (SOH) of the battery needs to be more than or equal to seventy percent.
In some embodiments, the predetermined warranty criteria include a predetermined age, a predetermined number of miles driven, and a predetermined battery state of health.
Illustratively, this step S102 may include the steps of:
and 1.1) determining the mileage of each year according to the preset service life and the preset running kilometers. The preset driving kilometers are 15 kilometers according to the preset service life of 8 years, the ratio of the two driving kilometers to the preset service life of 8 years can be known, and the driving kilometers per year are 1.875 kilometers per year.
And 1.2) determining the annual battery capacity attenuation of the current vehicle according to the preset battery health state and the preset service life.
Wherein the preset battery health state is seventy percent, and the preset service life is 8 years, so that the battery health state is every year
And 1.3), determining the mileage corresponding to the discharge capacity of the current vehicle per ampere hour according to the discharge capacity of the current vehicle under the cyclic endurance working condition and the preset running kilometer number.
For example, the discharge capacity of the actual engine is 113750Ah corresponding to a preset driving kilometer of 15 kilometers,
namely, the mileage corresponding to the discharge capacity per ampere hour of the battery is 1.3.
And step S104, determining the traveled mileage and the unlawn mileage of the current vehicle under the preset quality and protection standard according to the target quality and protection standard of the current vehicle and the annual traveled mileage.
In some embodiments, the target warranty criteria include a target service life of 2 years and a target miles traveled of 5 kilometers, a target service life of 3 years and a target miles traveled of 10 kilometers, a target service life of 3 years and a target miles traveled of 12 kilometers, a target service life of 3 years and a target miles traveled of 20 kilometers, a target service life of 10 years and a target miles traveled of 20 kilometers, to meet various application requirements.
Here, the target warranty standard is taken as an example of a target service life of 2 years and a target travel mileage of 5 kilometers; illustratively, this step S104 may be implemented by:
and 2.1) determining the traveled mileage of the current vehicle under the preset quality and protection standard according to the product of the target service life in the target quality and protection standard of the current vehicle and the traveled mileage per year.
Wherein, the mileage of each year is 1.875 ten thousand kilometers per year, the target service life is 2 years, namely the mileage of each year is 3.75 ten thousand kilometers; namely, the vehicle can run for 3.75 kilometers in the target warranty standard according to the preset warranty standard.
And 2.2) determining the unlawn mileage of the current vehicle under the preset quality and protection standard based on the difference value between the target driving mileage in the target quality and protection standard of the current vehicle and the driven mileage.
The target mileage of 5 kilometers in travel-3.75 kilometers in travel-1.25 kilometers in travel-which means that the target warranty standard is met, 1.25 kilometers in travel is also needed.
And S106, determining a first capacity attenuation corresponding to the traveled mileage according to the target quality assurance standard and the annual battery capacity attenuation of the current vehicle.
Wherein, the first capacity attenuation 7.5 percent is obtained according to the product of the target driving mileage of 2 years and the annual battery capacity attenuation 3.75 percent in the target quality and protection standard.
And S108, determining a second capacity attenuation under the circulation endurance working condition according to the number of miles not driven and the number of miles corresponding to the discharge capacity of the battery per ampere hour.
Exemplarily, the step S108 further includes the steps of:
and 3.1) determining the discharge capacity corresponding to the number of miles not driven according to the ratio of the number of miles not driven to the number of c.
Wherein the content of the first and second substances,
that is, if the unlawn mileage is to be completed according to the target warranty standard, the consumption discharge is requiredCapacity 9700 Ah.
And 3.2) determining a second capacity attenuation under the circulation endurance working condition according to the discharge capacity.
In some embodiments, the above discharge capacity is substituted into the following equation to determine a second capacity fade under cyclic endurance conditions:
wherein Q isCycleFor the second capacity fade, A, Z, Ea is the calibration factor, Ah is the discharge capacity, and T is the temperature. Here, the discharge capacity 9700Ah was substituted into the formula to obtain a second capacity fade of 3.936%.
In practical application, the formula calibration under the cyclic endurance condition can be realized through the following steps, as shown in fig. 2:
discharging the fully charged battery for 10min at a constant current of 91A; charging to 393.6V at 7kW constant power; charging at 393.6V until the current is reduced to 7.65A; standing for 5 min; discharging at constant current of 91A for 10 min; charging to 393.6V at 7kW constant power; charging at 393.6V to reduce the current to 7.65A; standing for 5 min;
the above process is cycled 2168 times, wherein the battery is charged and discharged standard once every 100 times.
The coefficients can be calibrated finally: a is 0.001375; ea1＝-942.6；Z＝0.7114。
And step S110, determining the battery health state of the current vehicle under the target warranty standard based on the first capacity attenuation and the second capacity attenuation.
The State Of Health Of a battery is understood to be (State Of Health, SOH), i.e. the battery capacity, the degree Of Health, the State Of performance, or the percentage Of the full charge capacity Of the battery relative to the rated capacity.
Illustratively, the sum of the first capacity fade of 7.5% and the second capacity fade of 3.936% results in a total fade of 11.436%, and thus the state of health SOH of the battery under the target warranty criterion is 100% -11.436% -88.564%.
In a preferred embodiment of practical application, by means of the preset quality assurance standard existing in the current vehicle, the annual battery capacity attenuation, annual driving mileage and mileage corresponding to the discharge capacity per ampere hour of the battery corresponding to the vehicle are determined, and according to the requirements of the target quality and protection standard, calculating the traveled mileage of the current vehicle and the unmet unlawn mileage according to the preset quality and protection standard, respectively calculating a first capacity attenuation corresponding to the traveled mileage and a second capacity attenuation corresponding to the unlawn mileage still needed to be met under the cyclic endurance working condition, based on the first capacity attenuation and the second capacity attenuation, meanwhile, the battery health state meeting the target quality assurance standard can be determined, and the battery health states corresponding to various target quality assurance standards can be more accurately determined by the method and serve as quality assurance indexes applied in various industry fields.
In some embodiments, the current battery health status of the user vehicle may be detected and a reimbursement condition may be determined according to the battery health status as a corresponding verification index under different warranty requirements, and the method further includes:
and 4.1) detecting the battery quality of the vehicle under the target service life based on the battery health state.
For example, the vehicle should meet the quality guarantee requirement of a target service life of 2 years and a target driving mileage of 5 kilometers, the battery health status should reach 88.564%, and if it is detected that the current service life of the vehicle is less than or equal to 2 years but the battery health status does not reach 88.564%, the vehicle can pay the user.
In some embodiments, according to the parameter values corresponding to the existing historical warranty standards, the SOH warranty values corresponding to different warranty conditions can be obtained, so as to provide reference indexes for various application scenarios, as shown in table 1:
TABLE 1
As shown in fig. 3, an embodiment of the present invention further provides an apparatus 200 for determining a state of health of a battery, where the apparatus includes:
the first determining module 201 determines the annual battery capacity attenuation, annual driving mileage and mileage corresponding to the discharge capacity of the battery per ampere hour of the current vehicle based on a preset quality assurance standard;
the second determining module 202 is used for determining the traveled mileage and the unlawn mileage of the current vehicle under the preset quality and protection standard according to the target quality and protection standard of the current vehicle and the annual traveled mileage;
the third determining module 203 determines a first capacity attenuation corresponding to the traveled mileage according to the target quality and protection standard and the annual battery capacity attenuation of the current vehicle;
a fourth determining module 204, configured to determine a second capacity attenuation under a cyclic endurance working condition according to the number of miles not driven and the number of miles corresponding to the discharge capacity of the battery per ampere hour;
the fifth determination module 205 determines a battery state of health of the current vehicle under the target warranty criterion based on the first and second capacity attenuations.
In some embodiments, the second determining module 202 is further specifically configured to determine the traveled mileage of the current vehicle under the preset warranty standard according to a product of the target service life of the current vehicle and the annual traveled mileage; and determining the unlawn mileage of the current vehicle under the preset quality and protection standard based on the difference value between the target driving mileage in the target quality and protection standard of the current vehicle and the driven mileage.
In some embodiments, the fourth determining module 204 is further specifically configured to determine the discharge capacity corresponding to the unlawn mileage according to a ratio of the unlawn mileage to a mileage corresponding to the discharge capacity per ampere hour of the battery; and determining a second capacity fade under the cyclic endurance working condition according to the discharge capacity.
In some embodiments, the fourth determination module 204 is further specifically configured to substitute the discharge capacity into the following equation to determine a second capacity fade under cyclic endurance conditions:
wherein Q isCycleFor the second capacity fade, A, Z, Ea is the calibration factor, Ah is the discharge capacity, and T is the temperature.
In some embodiments, the apparatus further comprises a detection module that detects a battery quality of the vehicle at a target age based on the battery state of health.
In some embodiments, the predetermined warranty criteria include a predetermined age, a predetermined number of miles driven, and a predetermined battery state of health; the first determining module 201 is further specifically configured to determine the mileage traveled each year according to the preset service life and the preset number of kilometers traveled; determining the annual battery capacity attenuation of the current vehicle according to the preset battery health state and the preset service life; and determining the mileage corresponding to the discharge capacity of the current vehicle per ampere hour according to the discharge capacity of the current vehicle under the cyclic endurance working condition and the preset running kilometer number.
In some embodiments, the target warranty criteria include a target age of 3 years and a target miles driven of 10 kilometers, a target age of 3 years and a target miles driven of 12 kilometers, a target age of 3 years and a target miles driven of 20 kilometers, a target age of 10 years and a target miles driven of 20 kilometers.
Fig. 4 is a schematic hardware architecture diagram of an electronic device 300 according to an embodiment of the present invention. Referring to fig. 4, the electronic device 300 includes: a machine-readable storage medium 301 and a processor 302, and may further include a non-volatile storage medium 303, a communication interface 304, and a bus 305; among other things, the machine-readable storage medium 301, the processor 302, the non-volatile storage medium 303, and the communication interface 304 communicate with each other via a bus 305. The processor 302 may perform the method of determining battery state of health described in the above embodiments by reading and executing machine executable instructions of the determination of battery state of health in the machine readable storage medium 301.
A machine-readable storage medium as referred to herein may be any electronic, magnetic, optical, or other physical storage device that can contain or store information such as executable instructions, data, and the like. For example, the machine-readable storage medium may be: a RAM (random Access Memory), a volatile Memory, a non-volatile Memory, a flash Memory, a storage drive (e.g., a hard drive), any type of storage disk (e.g., an optical disk, a dvd, etc.), or similar storage medium, or a combination thereof.
The non-volatile medium may be non-volatile memory, flash memory, a storage drive (such as a hard drive), any type of storage disk (such as an optical disk, dvd, etc.), or similar non-volatile storage medium, or a combination thereof.
It can be understood that the specific operation method of each functional module in this embodiment may refer to the detailed description of the corresponding step in the foregoing method embodiments, and details are not repeated here.
The computer-readable storage medium provided in the embodiments of the present invention stores a computer program, and when executed, the computer program code may implement the method for determining a health status of a battery according to any one of the embodiments described above, and specific implementation may refer to the method embodiment, which is not described herein again.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the apparatus described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein.
Claims (10)
1. A method of determining a state of health of a battery, the method comprising:
determining the annual battery capacity attenuation, annual driving mileage and mileage corresponding to the battery discharge capacity per ampere hour of the current vehicle based on a preset quality and protection standard;
determining the traveled mileage and the unlawn mileage of the current vehicle under the preset quality and protection standard according to the target quality and protection standard of the current vehicle and the annual traveled mileage;
determining a first capacity attenuation corresponding to the traveled mileage according to the target quality and guarantee standard and the annual battery capacity attenuation of the current vehicle;
determining a second capacity attenuation under the circulation endurance working condition according to the number of miles not driven and the number of miles corresponding to the discharge capacity of the battery per ampere hour;
determining a battery state of health of the current vehicle under the target warranty criterion based on the first and second capacity attenuations.
2. The method of claim 1, wherein the step of determining the miles traveled and miles undriven of the current vehicle under the pre-set warranty criteria based on the target warranty criteria for the current vehicle and the miles traveled per year comprises:
determining the traveled mileage of the current vehicle under the preset quality and protection standard according to the product of the target service life in the target quality and protection standard of the current vehicle and the traveled mileage per year;
and determining the unlawn mileage of the current vehicle under the preset quality and protection standard based on the difference value between the target driving mileage in the target quality and protection standard of the current vehicle and the driven mileage.
3. The method of claim 1, wherein determining a second capacity fade under a cycling endurance operating condition based on the undriven mileage and a mileage corresponding to the discharge capacity per ampere-hour of the battery comprises:
determining the discharge capacity corresponding to the unlawn mileage according to the ratio of the unlawn mileage to the mileage corresponding to the battery discharge capacity per ampere hour;
and determining a second capacity fade under the cyclic endurance working condition according to the discharge capacity.
4. The method of claim 3, wherein the step of determining a second capacity fade for a cyclic endurance condition based on the discharge capacity comprises:
substituting the discharge capacity into the following equation to determine a second capacity fade under cyclic endurance conditions:
wherein Q isCycleFor the second capacity fade, A, Z, Ea is the calibration factor, Ah is the discharge capacity, and T is the temperature.
5. The method of claim 1, further comprising:
the battery quality of the vehicle at a target age is detected based on the battery state of health.
6. The method of claim 1, wherein the predetermined warranty criteria include a predetermined age, a predetermined number of miles driven, and a predetermined battery state of health; based on the preset quality and protection standard, determining the annual battery capacity attenuation, annual driving mileage and mileage corresponding to the battery discharge capacity per ampere hour of the current vehicle, wherein the steps comprise:
determining the mileage of each year according to the preset service life and the preset running kilometers;
determining the annual battery capacity attenuation of the current vehicle according to the preset battery health state and the preset service life;
and determining the mileage corresponding to the discharge capacity of the battery of the current vehicle per ampere hour according to the discharge capacity of the current vehicle under the circulation endurance working condition and the preset running kilometer number.
7. The method of claim 1, wherein the target warranty criteria comprises a target age of 3 years and a target miles driven of 10 kilometers, a target age of 3 years and a target miles driven of 12 kilometers, a target age of 3 years and a target miles driven of 20 kilometers, a target age of 10 years and a target miles driven of 20 kilometers.
8. An apparatus for determining a state of health of a battery, the apparatus comprising:
the first determination module is used for determining annual battery capacity attenuation, annual driving mileage and mileage corresponding to battery discharge capacity per ampere hour of the current vehicle based on a preset quality and protection standard;
the second determination module is used for determining the traveled mileage and the unlawn mileage of the current vehicle under the preset quality and protection standard according to the target quality and protection standard of the current vehicle and the annual traveled mileage;
the third determining module is used for determining a first capacity attenuation corresponding to the traveled mileage according to the target quality and guarantee standard and the annual battery capacity attenuation of the current vehicle;
the fourth determining module is used for determining second capacity attenuation under the circulation endurance working condition according to the number of miles not driven and the number of miles corresponding to the discharge capacity of the battery per ampere hour;
a fifth determination module that determines a battery state of health of the current vehicle under the target warranty criterion based on the first and second capacity attenuations.
9. An electronic device comprising a memory and a processor, wherein the memory stores a computer program operable on the processor, and wherein the processor implements the steps of the method of any of claims 1 to 7 when executing the computer program.
10. A machine-readable storage medium having stored thereon machine-executable instructions which, when invoked and executed by a processor, cause the processor to carry out the steps of the method of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| WO2024093269A1 (en) * | 2022-10-31 | 2024-05-10 | 比亚迪股份有限公司 | Battery state of health prediction method, electronic device, and readable storage medium |
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