CN114707908B

CN114707908B - Power battery rating determination method and device and electronic equipment

Info

Publication number: CN114707908B
Application number: CN202210536079.4A
Authority: CN
Inventors: 吴浩
Original assignee: Beijing Titanium Magnesium New Technology Co ltd
Current assignee: Wu Hao
Priority date: 2022-05-18
Filing date: 2022-05-18
Publication date: 2022-08-23
Anticipated expiration: 2042-05-18
Also published as: CN114707908A

Abstract

The application provides a power battery rating determination method, a power battery rating determination device and electronic equipment, and relates to the technical field of power batteries, wherein the method comprises the following steps: acquiring a parameter value of a rating parameter corresponding to the power battery to be rated; for each manufacturing parameter, if the parameter value of the manufacturing parameter is within the target interval of the manufacturing parameter, determining the difference between the parameter value of the manufacturing parameter and the target manufacturing parameter value as the offset value of the manufacturing parameter; determining the manufacturing score of the power battery to be evaluated based on the deviation value of each manufacturing parameter, the score coefficient value corresponding to each manufacturing parameter and the basic score of each manufacturing parameter; and determining a plurality of usage scores, and determining the rating of the power battery to be rated by using the manufacturing score, the plurality of usage scores and the rating condition corresponding to each rating. By adopting the method and the device for determining the rating of the power battery and the electronic equipment, the problem that the state of the power battery cannot be comprehensively and accurately evaluated is solved.

Description

Power battery rating determination method and device and electronic equipment

Technical Field

The application relates to the technical field of power batteries, in particular to a power battery rating determining method and device and electronic equipment.

Background

The service life of the power battery of the current new energy automobile is about 5-8 years, and in order to meet the purposes of equal-quality charging, selling, transferring and the like in the using process of the power battery, the power battery needs to be identified and graded. In order to ensure the healthy and rapid development of the market of the power battery, a set of complete identification and rating standards of the power battery in use is urgently needed to be established.

The existing power battery rating determination method generally only evaluates the service condition of the power battery, and the evaluation index is limited, so that the condition of the power battery cannot be comprehensively and accurately evaluated.

Disclosure of Invention

In view of this, an object of the present application is to provide a method, an apparatus and an electronic device for determining a rating of a power battery, which solve the problem that the status of the power battery cannot be evaluated comprehensively and accurately.

In a first aspect, an embodiment of the present application provides a power battery rating determining method, including:

acquiring a parameter value of a rating parameter corresponding to the power battery to be rated, wherein the rating parameter comprises a manufacturing parameter, and the manufacturing parameter comprises a design parameter, a material parameter, a process parameter and a brand parameter;

for each manufacturing parameter, if the parameter value of the manufacturing parameter is within the target interval of the manufacturing parameter, determining the difference between the parameter value of the manufacturing parameter and the target manufacturing parameter value as the offset value of the manufacturing parameter;

determining the manufacturing score of the power battery to be evaluated based on the deviation value of each manufacturing parameter, the score coefficient value corresponding to each manufacturing parameter and the basic score of each manufacturing parameter;

determining a plurality of use scores, and determining the rating of the power battery to be rated by using the manufacturing score, the plurality of use scores and the rating conditions corresponding to the ratings, wherein the plurality of use scores comprise a service life score, a safety score, a performance score, an appearance quality score and a personalized score.

Optionally, determining a manufacturing score of the power battery to be rated based on the offset value of each manufacturing parameter, the scoring coefficient value corresponding to each manufacturing parameter, and the base score of each manufacturing parameter, includes: for each manufacturing parameter, determining a product of the offset value of the manufacturing parameter and a score weight value corresponding to the manufacturing parameter as a floating score; determining, for each manufacturing parameter, a sum of the floating score for the manufacturing parameter and the manufacturing base score for the manufacturing parameter as a manufacturing score for the manufacturing parameter; and determining the sum of the plurality of manufacturing parameter scores as the manufacturing score of the power battery to be graded.

Optionally, determining a plurality of usage scores, and determining the rating of the power battery to be rated by using the manufacturing score, the plurality of usage scores and the rating condition corresponding to each rating, includes: respectively multiplying the service life score, the safety score, the performance score, the manufacturing score, the appearance quality score and the personalized score by the score weight of each score, and determining the sum of the products as the total score of the power battery to be rated; determining a target scoring interval where the total score of the power battery to be graded is located; and determining the rating of the power battery to be rated based on the rating corresponding to the target rating interval and the rating condition corresponding to each rating.

Optionally, the rating parameters further include personalization parameters, the personalization parameters including application parameters, environmental parameters, and maintenance parameters; the step of determining the personalized score of the power battery to be rated comprises the following steps: determining personalized ratings corresponding to the application parameters, the environment parameters and the maintenance parameters respectively; aiming at each personalized parameter, determining a single personalized score corresponding to the personalized parameter according to the personalized rating corresponding to the personalized parameter; and determining the sum of the plurality of individual personalized scores as the personalized score of the power battery to be rated.

Optionally, the rating parameters further comprise lifetime parameters, the lifetime parameters comprising health status, calendar lifetime and usage mileage; the step of determining the service life score of the power battery to be rated comprises the following steps: determining whether the parameter value of the health state is not less than the nominal health state parameter value; if the health status is not less than the rated health status parameter value, determining a health status score based on the parameter value of the health status and the health status basic score; determining the ratio of the parameter value of the calendar life to the parameter value of the rated calendar life as the ratio of the calendar life; determining a calendar life score based on the calendar life ratio and the calendar life basic score; determining the ratio of the parameter value of the used mileage to the parameter value of the rated used mileage as the ratio of the used mileage; determining a usage mileage score based on the usage mileage ratio and the usage mileage base score; and determining the sum of the health status score, the calendar life score and the use mileage score as the life score of the power battery to be rated.

Optionally, the rating parameters further include safety parameters, the safety parameters include internal resistance parameters, consistency parameters, temperature parameters, protection parameters and insulation parameters, the consistency parameters include internal resistance consistency, capacitance consistency and voltage consistency, the temperature parameters include temperature tolerance, maximum monomer temperature rise, temperature difference, energy consumption, temperature rise rate and temperature drop rate, the protection parameters include protection circuit parameters, diaphragm safety parameters and scanning parameters, and the insulation parameters include high-voltage battery insulation, positive battery insulation and negative battery insulation; the step of determining the safety score of the power battery to be rated comprises the following steps: determining the ratio of the parameter value of the internal resistance parameter to the maximum allowable internal resistance value as the internal resistance ratio; determining the difference between the basic internal resistance score and the adjusted internal resistance ratio as an internal resistance score; for each consistency parameter, if the parameter value of the consistency parameter is in a target consistency interval corresponding to the adjusted consistency parameter, determining the difference value between the consistency basic score of the consistency parameter and the parameter value of the consistency parameter as the consistency score of the consistency parameter; for each temperature parameter, if the parameter value of the temperature parameter is in a target temperature interval corresponding to the temperature parameter, determining the difference value between the temperature basic score of the temperature parameter and the adjusted parameter value of the temperature parameter as the temperature score of the temperature parameter; determining a protection rating corresponding to a parameter value of each protection parameter and a protection score corresponding to the protection rating for each protection parameter; for each insulation parameter, if the parameter value of the insulation parameter is in a target insulation interval corresponding to the insulation parameter, determining the adjusted parameter value of the insulation parameter as an insulation score of the insulation parameter; and determining the internal resistance score, the consistency scores, the temperature scores, the protection scores and the sum of the insulation scores as the safety score of the power battery to be graded.

Optionally, the rating parameters further include performance parameters, the performance parameters include room temperature parameters and charge and discharge parameters, the room temperature parameters include room temperature capacity, room temperature high rate capacity, and room temperature power, and the charge and discharge parameters include quick charge, standard charge time, charge efficiency, standard discharge time, maximum discharge current, and discharge efficiency; the step of determining the performance score of the power battery to be rated comprises the following steps: for each room temperature parameter, determining the product of the room temperature ratio of the room temperature parameter and the room temperature basic score of the room temperature parameter as the room temperature score of the room temperature parameter, wherein the room temperature ratio of the room temperature parameter is the ratio of the parameter value of the room temperature parameter and the rated room temperature parameter value of the room temperature parameter; for each charge and discharge parameter, if the parameter value of the charge and discharge parameter is in a target charge and discharge interval corresponding to the charge and discharge parameter, determining the sum of the adjusted parameter value of the charge and discharge parameter and the charge and discharge basic score of the charge and discharge parameter as the charge and discharge score of the charge and discharge parameter; and determining the sum of the plurality of room temperature scores and the plurality of charge and discharge scores as the performance score of the power battery to be rated.

Optionally, the rating parameters further include appearance quality parameters, the appearance quality parameters include appearance state parameters, appearance parameters and polarity parameters, the appearance parameters include definition and quality size consistency, and the polarity parameters include polarity definition level and tab damage level; the step of determining the appearance quality score of the power battery to be rated comprises the following steps: determining an appearance state grade corresponding to the parameter value of the appearance state parameter and an appearance state score corresponding to the appearance state grade; determining the appearance grade corresponding to the parameter value of each appearance parameter and the appearance grade corresponding to the appearance grade for each appearance parameter; for each polarity parameter, determining a polarity rating corresponding to the parameter value of the polarity parameter and a polarity score corresponding to the polarity rating; and determining the appearance state score, the plurality of appearance scores and the sum of the plurality of polarity scores as the appearance quality score of the power battery to be graded.

In a second aspect, an embodiment of the present application further provides a power battery rating determining apparatus, where the apparatus includes:

the data acquisition module is used for acquiring the parameter values of rating parameters corresponding to the power battery to be rated, wherein the rating parameters comprise manufacturing parameters, and the manufacturing parameters comprise design parameters, material parameters, process parameters and brand parameters;

the data calculation module is used for determining the difference value between the parameter value of the manufacturing parameter and a target manufacturing parameter value as the offset value of the manufacturing parameter if the parameter value of the manufacturing parameter is within the target interval of the manufacturing parameter for each manufacturing parameter;

the manufacturing score determining module is used for determining the manufacturing score of the power battery to be evaluated based on the deviation value of each manufacturing parameter, the score coefficient value corresponding to each manufacturing parameter and the basic score of each manufacturing parameter;

and the rating determining module is used for determining a plurality of using scores and determining the rating of the power battery to be rated by using the manufacturing score, the plurality of using scores and the rating condition corresponding to each rating, wherein the plurality of using scores comprise a service life score, a safety score, a performance score, an appearance quality score and a personalized score.

In a third aspect, an embodiment of the present application further provides an electronic device, including: a processor, a memory and a bus, the memory storing machine readable instructions executable by the processor, the processor and the memory communicating over the bus when the electronic device is operating, the machine readable instructions when executed by the processor performing the steps of the power battery rating determination method as described above.

The embodiment of the application brings the following beneficial effects:

according to the power battery rating determining method, the power battery rating determining device and the electronic equipment, the manufacturing level of the power battery can be comprehensively evaluated through design parameters, material parameters, process parameters and brand parameters, meanwhile, the service condition of the power battery can be evaluated through a plurality of service scores, so that when the state of the power battery is evaluated, the power battery can be comprehensively evaluated from the congenital manufacturing level and the postnatal latitude of the service condition.

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 illustrates a flow chart of a power cell rating determination method provided by an embodiment of the present application;

fig. 2 is a schematic structural diagram of a power battery rating determination apparatus provided in an embodiment of the present application;

fig. 3 shows a schematic structural diagram of an electronic device provided in an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, 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, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. Every other embodiment that can be obtained by a person skilled in the art without making creative efforts based on the embodiments of the present application falls within the protection scope of the present application.

Before the application is provided, the service life of the power battery of the new energy automobile is about 5-8 years, and in order to meet the purposes of equal quality charging, selling, transferring and the like in the use process of the power battery, the power battery needs to be identified and rated. In order to ensure the healthy and rapid development of the market of the power battery, a set of complete identification and rating standards of the power battery in use is urgently needed to be established. The existing power battery rating determination method is generally only used for evaluating the service condition of a power battery, and the evaluation index is limited, so that the condition of the power battery cannot be comprehensively and accurately evaluated.

Based on this, the embodiment of the application provides a power battery rating determination method to improve comprehensiveness and accuracy of evaluating the state of a power battery.

Referring to fig. 1, fig. 1 is a flowchart of a power battery rating determination method according to an embodiment of the present disclosure. As shown in fig. 1, a power battery rating determination method provided in an embodiment of the present application includes:

and S101, obtaining a parameter value of a rating parameter corresponding to the power battery to be rated.

In this step, the rating parameters may refer to various performance parameters of the power battery to be rated, the rating parameters are used for evaluating the state of the power battery to be rated, and the rating parameters include manufacturing parameters.

The manufacturing parameters can refer to the production manufacturing parameters of the power battery to be rated, the manufacturing parameters are used for evaluating the congenital condition of the power battery to be rated, and the manufacturing parameters comprise design parameters, material parameters, process parameters and brand parameters.

The design parameters are used for representing the design level of the power battery to be evaluated, and include mass specific energy, volume specific energy, specific power, charge retention rate, capacity recovery capacity and self-discharge rate.

The material parameters are used for representing the high-quality degree of the production material of the power battery to be evaluated, and comprise the energy density of the anode material and the tap density of the cathode material.

The process parameters are used for representing the process manufacturing level of the power battery to be evaluated, and include material utilization rate, uniformity variation coefficient, first-time qualification rate and monomer manufacturing cost.

The brand parameters are used for representing the brand quality of the power battery to be evaluated, and comprise market share, unit energy cost, the number of invented patents, technical research and development investment and fault rate.

It should be noted that the meaning of the design parameters, the material parameters, the process parameters, and the brand parameters and the calculation method are all in the prior art, and are not described herein again.

In the embodiment of the present application, after the power battery is produced, the common practice of producing the power battery will publish various parameters of the power battery, and one parameter may be regarded as a rating index, and the parameters include: the mass specific energy, the volumetric specific energy, the specific power charge retention rate, the capacity recovery capability, the self-discharge rate, the energy density of the positive electrode material and the tap density of the negative electrode material can be obtained from manufacturers, meanwhile, the material utilization rate, the uniformity variation coefficient, the primary qualification rate and the monomer manufacturing cost can be obtained from data published by the industry or manufacturers, and the data of the power battery manufacturers such as the brand position score, the public praise score, the market share, the unit energy cost, the invention patent number, the technical research and development investment, the fault rate and the like in the whole industry are obtained and stored. When a power battery of a certain model of a certain manufacturer is rated, the rating parameters corresponding to the power battery can be obtained from the stored data, so that the power battery to be rated is evaluated according to the rating parameters.

Step S102, for each manufacturing parameter, if the parameter value of the manufacturing parameter is within the target interval of the manufacturing parameter, determining the difference between the parameter value of the manufacturing parameter and the target manufacturing parameter value as the offset value of the manufacturing parameter.

In this step, the manufacturing parameter target interval may refer to an interval selected from a plurality of manufacturing parameter intervals, and the manufacturing parameter target interval is used to determine a score corresponding to a manufacturing parameter of the power battery to be evaluated.

The target manufacturing parameter value may refer to a reference value of a parameter value of the manufacturing parameter, and the target manufacturing parameter value is used for determining the grade of the manufacturing parameter of the power battery to be graded within the manufacturing parameter target interval.

The offset value may refer to a degree of deviation of a parameter value of the manufacturing parameter from a target manufacturing parameter value.

In the embodiment of the application, a manufacturing parameter interval where each manufacturing parameter is located is determined according to the parameter value of each manufacturing parameter, and if the parameter value is within a manufacturing parameter target interval, a difference value between the parameter value and a target manufacturing parameter value is calculated. And the target manufacturing parameter value corresponding to each manufacturing parameter is determined according to the upper limit and the lower limit of the target interval of the manufacturing parameters.

Specifically, for each manufacturing parameter, whether a parameter value of the manufacturing parameter is within a target interval of the manufacturing parameter may be determined in the following manner.

When the mass specific energy is less than or equal to 160, determining that the mass specific energy is in a first interval; when the mass specific energy is more than or equal to 260, determining that the mass specific energy is in a second interval; when 160 is finished<Specific energy of mass<At 260, it is determined that the specific energy is in the target range, and160 as the target manufacturing parameter value of the manufacturing parameter, the offset value of the manufacturing parameter is: specific energy of mass

160. Taking the mass specific energy as 200 as an example, the offset value of the mass specific energy is 200-.

The division of the intervals of the respective manufacturing parameters is described below with reference to table 1.

Table 1: manufacturing a value range table of different intervals of the parameters.

As shown in table 1, for each manufacturing parameter, all values of the manufacturing parameter are divided into a plurality of intervals, including a first interval, a second interval, and a third interval, where the third interval is a target interval of the manufacturing parameter, the target interval is an interval greater than a first parameter value and smaller than a second parameter value, the first interval is an interval less than or equal to the first parameter value, the second interval is an interval greater than or equal to the second parameter value, and the first parameter value and the second parameter value are set values. The target manufacturing parameter value may be determined from a first parameter value, for example: the target manufacturing parameter value may be equal to the first parameter value, or the target manufacturing parameter value may be calculated according to a set formula, where the set formula may be the first parameter value multiplied by a preset coefficient value, or the set formula may be the first parameter value added to a preset base value. In addition, the target manufacturing parameter value may also be determined jointly according to the first parameter value and the second parameter value, for example: the target manufacturing parameter value may be equal to an average of the first parameter value and the second parameter value.

In a preferred example, the values of the first parameter value and the second parameter value can be adjusted through feedback of the evaluation result of the power battery to be rated.

Step S103, determining the manufacturing score of the power battery to be evaluated based on the deviation value of each manufacturing parameter, the scoring coefficient value corresponding to each manufacturing parameter and the basic score of each manufacturing parameter.

In this step, the score coefficient value may refer to a coefficient of the offset value of the manufacturing parameter, and the score coefficient value is used to adjust the score of the manufacturing parameter.

A base score may refer to a score that characterizes the importance of the manufacturing parameter.

The manufacturing score is used for representing the manufacturing level of the power battery to be evaluated, wherein the higher the manufacturing score is, the higher the manufacturing level of the power battery to be evaluated is, and the lower the manufacturing score is, the lower the manufacturing level of the power battery to be evaluated is.

In the embodiment of the application, for each manufacturing parameter, the offset value, the score coefficient value and the base score of the manufacturing parameter are used to calculate the manufacturing score of the manufacturing parameter, and then the sum of the manufacturing scores of all the manufacturing parameters is determined as the manufacturing score of the power battery to be rated.

In an alternative embodiment, performing step S103 comprises: for each manufacturing parameter, determining a product of the offset value of the manufacturing parameter and a score weight value corresponding to the manufacturing parameter as a floating score; determining, for each manufacturing parameter, a sum of the floating score for the manufacturing parameter and the manufacturing base score for the manufacturing parameter as a manufacturing score for the manufacturing parameter; and determining the sum of the plurality of manufacturing parameter scores as the manufacturing score of the power battery to be graded.

Here, the sum of the offset value and the base score of the manufacturing parameter is used as a temporary manufacturing score, the product of the temporary manufacturing score and the score coefficient value is used as a manufacturing score of the manufacturing parameter, and the sum of the manufacturing scores of all the manufacturing parameters is used as a manufacturing score of the power battery to be evaluated.

As can be appreciated, each manufacturing parameter has a corresponding manufacturing score, and the manufacturing condition of the power battery to be rated can be more comprehensively evaluated.

The manufacturing parameters further include structural parameters, the structural parameters include overall dimension general interchangeability, structural strength and internal structure, data of the structural parameters are collected and a data distribution curve is generated for each structural parameter, the data distribution curve is divided into a plurality of parts, each part corresponds to one score, the score of the structural parameter is determined according to the position of the parameter value of the structural parameter in the corresponding curve, and the sum of the structural parameter score and other manufacturing scores is used as the manufacturing score of the power battery to be scored.

The material parameters also comprise the comprehensive performance of the negative electrode material and the comprehensive performance of the electrolyte, wherein the comprehensive performance of the negative electrode material is used for grading various indexes of the negative electrode material, and the comprehensive performance of the electrolyte is used for grading various indexes of the electrolyte. The method for scoring the comprehensive performance of the negative electrode material and the comprehensive performance of the electrolyte is the same as the method for scoring the structural parameters, a data distribution curve of the comprehensive performance of the negative electrode material and a data distribution curve of the comprehensive performance of the electrolyte are divided into a plurality of parts, and the comprehensive performance score of the negative electrode material and the comprehensive performance score of the electrolyte are determined according to the positions of the comprehensive performance of the negative electrode material and the comprehensive performance of the electrolyte of the power battery to be scored on the corresponding data distribution curves.

The process parameters further comprise a production line automatic intelligent level, the production line automatic intelligent level is determined according to the production line automatic intelligent level of a manufacturer of the power battery to be evaluated, a data distribution curve is generated by acquiring the production line intelligent degree of the whole industry, and the grade of the production line automatic intelligent level is determined according to the position of the production line automatic intelligent level of the manufacturer of the power battery to be evaluated in the data distribution curve.

The brand parameters also comprise the whole industry brand position and public praise, the parameter values of the parameters can be obtained through a network, a rating mechanism and the like, then, the brand rating corresponding to the parameter values of the brand parameters is determined, and the brand grade of the brand parameters is determined according to the brand rating.

And step S104, determining a plurality of use scores, and determining the rating of the power battery to be rated by using the manufacturing score, the plurality of use scores and the rating conditions corresponding to the ratings.

In the step, the use score is used for representing the service condition of the power battery to be rated, the higher the use score is, the better the service condition of the power battery to be rated is, and the lower the use score is, the worse the service condition of the power battery to be rated is.

The usage score includes a plurality of usage scores including a longevity score, a safety score, a performance score, an appearance quality score, and a personalization score.

And the service life score is used for representing the remaining service life of the power battery to be evaluated.

The safety score is used for characterizing the safety of the power battery to be rated.

And the performance score is used for representing the room temperature capacity and the charging and discharging service condition of the power battery to be evaluated.

And the appearance quality score is used for representing the quality of the appearance of the power battery to be evaluated.

The personalized score is used for representing the personal use condition, the use environment and the maintenance condition of the power battery to be graded.

In the embodiment of the application, after the service life score, the safety score, the performance score, the manufacturing score, the appearance quality score and the personalized score of the power battery to be rated are determined, the total score of the power battery to be rated is calculated, and then the final rating of the power battery to be rated is determined according to the total score and the rating condition of the rating corresponding to the total score.

In an optional embodiment, determining a plurality of usage scores and determining the rating of the power battery to be rated by using the manufacturing score, the plurality of usage scores and the rating condition corresponding to each rating comprises: respectively multiplying the service life score, the safety score, the performance score, the manufacturing score, the appearance quality score and the personalized score by the score weight of each score, and determining the sum of the products as the total score of the power battery to be rated; determining a target scoring interval where the total score of the power battery to be graded is located; and determining the rating of the power battery to be rated based on the rating corresponding to the target rating interval and the rating condition corresponding to each rating.

Here, after determining a plurality of usage scores and manufacturing scores, the product of each score with a corresponding score weight is calculated, determining the sum of all products as the total grade of the power battery to be graded, determining the grade corresponding to the total grade according to the preset grade range of each grade, meanwhile, whether the power battery to be rated meets the rating condition of the rating corresponding to the total rating is determined, if not, determining whether the power battery to be rated meets a rating condition of one grade lower than the rating corresponding to the total rating, and if so, taking the rating which is one level lower as the rating of the power battery to be rated, if not, continuously determining whether the power battery to be rated meets the rating condition which is two levels lower than the rating corresponding to the total rating, and so on until the rating which meets the rating condition is determined, and taking the rating which meets the rating condition as the rating of the power battery to be rated.

The rating may be divided into five levels, A, B, C, D, E for the levels from high to low. Wherein the requirements of each rating are as follows:

a level: the total score is more than or equal to 900, and all the following rating conditions are met: the safety performance is qualified, the use period is less than or equal to 8 kilometers, the SOH (State of Health, SOH Health State) is more than or equal to 92 percent, the internal resistance is almost unchanged, the appearance mark is clear, and 9 new products are not damaged.

B stage: the total score Y is more than or equal to 700; and all the following rating conditions are satisfied at the same time: within 54 months of use, the safety performance is qualified, the number of deep charging and discharging cycles is less than 800, the use mileage is less than or equal to 25 kilometers, the SOH is more than or equal to 85 percent, the appearance mark is clear, and no mechanical damage is generated 8 times.

C level: the total score Y is more than or equal to 600; and simultaneously satisfies all of the following rating conditions: the automobile has qualified safety performance within the specified longest service life, deep charge and discharge cycle times are less than Nn times, the manufacturer promises that the service mileage is within, the SOH is more than or equal to 80 percent, the appearance mark is clear, no mechanical damage exists, and slight corrosion is 7 percent new.

D stage: the total score Y is more than or equal to 500; and all the following rating conditions are satisfied at the same time: within the specified maximum service life, the safety performance is qualified, the SOH is more than or equal to 70 percent, the appearance mark is clear, and 6 rusts become new.

E, grade: the total score Y is more than or equal to 300; and simultaneously satisfies all of the following rating conditions: within the specified longest service life, the safety performance is qualified, the SOH is more than or equal to 50 percent, the appearance mark is clear, and the rust 4 is new.

Taking the total score of 800 as an example, because the rating corresponding to the total score is the B level, whether the power battery to be rated meets all the rating conditions of the B level is judged, if not, whether the power battery to be rated meets all the rating conditions of the C level is judged, and if so, the rating of the power battery to be rated is determined to be the C level. The grade A, grade B and grade C rating standards are rating standards of the power battery for the automobile, and the grade D and grade E rating standards are rating standards of the power battery for the non-automobile.

It should be noted that if the rating needs to be divided in more detail, the above 5 ratings A, B, C, D, E may be subdivided, for example: each rating is divided into three sub-ratings, and taking the rating C as an example, the rating C can be divided into three sub-ratings, i.e., C +, C, C, the scores of the three sub-ratings are: 600+(700-600)

100%=700、600+（700-600）

70%=670、600+（700-600）

30% =630, i.e., the score interval for the C + sub-rating is 670 to 700, the score interval for the C sub-rating is 630 to 670, and the score interval for the C-sub-rating is 600 to 630.

In an optional embodiment, the rating parameters further comprise personalization parameters, the personalization parameters comprising application parameters, environmental parameters, and maintenance parameters; the step of determining the personalized score of the power battery to be rated comprises the following steps: determining personalized ratings corresponding to the application parameters, the environment parameters and the maintenance parameters respectively; aiming at each personalized parameter, determining a single personalized score corresponding to the personalized parameter according to the personalized rating corresponding to the personalized parameter; and determining the sum of the plurality of individual personalized scores as the personalized score of the power battery to be rated.

The individuation parameters are used for representing the condition of the power battery to be evaluated in the aspects of application frequency, working environment and maintenance.

Feedback information of a user using the power battery to be evaluated can be obtained in an investigation mode, the feedback information comprises parameter values of application parameters of the power battery to be evaluated, and the application parameters comprise use conditions, quick charging frequency, charging time, storage places and low-current equalizing charging frequency.

The use working condition refers to the working condition that a vehicle carrying the power battery to be rated usually runs under, the quick charging frequency refers to the frequency of adopting quick charging for the vehicle carrying the power battery to be rated, the charging time refers to the time point at which the vehicle carrying the power battery to be rated can be charged, the storage place refers to the place where the vehicle carrying the power battery to be rated is stored, and the low-current equalizing charging frequency refers to the frequency of adopting low-current equalizing charging for the vehicle carrying the power battery to be rated.

The data may be obtained by data from other sources, such as: the method comprises the steps of obtaining parameter values of environmental parameters through a network, newspapers and periodicals, data published by public institutions and the like, wherein the environmental parameters comprise environmental humidity, environmental high temperature, environmental low temperature, environmental pollution, environmental types, road conditions and acid-base conditions.

The environment humidity refers to the average humidity of the long-term use environment of the power battery to be rated, the environment high temperature refers to the highest temperature reached by the specified days in the use environment of the power battery to be rated, the environment low temperature refers to the lowest temperature reached by the specified days in the use environment of the power battery to be rated, the environment pollution refers to the air pollution degree reached by the specified days in the use environment of the power battery to be rated, the environment type refers to whether the use environment of the power battery to be rated is a coastal region or a lake region, the road condition refers to the road condition of the vehicle carrying the power battery to be rated, and the acid-base condition refers to whether the acid-base problem occurs in the region of the vehicle carrying the power battery to be rated.

The parameter values of the maintenance parameters can be obtained through user research or in a data reporting mode of a maintenance mechanism, and the maintenance parameters comprise maintenance records and repair records.

The maintenance record refers to whether the power battery to be rated has a regular maintenance record, and the repair record refers to the number of times of repair of the power battery to be rated.

The rating of the different personalization parameters is described below with reference to table 2.

Table 2: and a rating standard table for different ratings of the personalized parameters.

As shown in table 2, the personalized rating corresponding to the parameter value of the personalized parameter can be determined according to the parameter value of the personalized parameter, and each personalized rating corresponds to a different individual personalized score, so that the individual personalized score corresponding to each personalized parameter can be determined, and the sum of all the individual personalized scores is used as the personalized score of the power battery to be rated.

In an optional embodiment, the rating parameters further comprise lifetime parameters comprising health status, calendar life, and usage mileage; the step of determining the service life score of the power battery to be rated comprises the following steps: determining whether the parameter value of the health state is not less than the nominal health state parameter value; if the health status is not less than the rated health status parameter value, determining a health status score based on the parameter value of the health status and the health status basic score; determining the ratio of the parameter value of the calendar life to the parameter value of the rated calendar life as the ratio of the calendar life; determining a calendar life score based on the calendar life ratio and the calendar life basic score; determining the ratio of the parameter value of the used mileage to the parameter value of the rated used mileage as the ratio of the used mileage; determining a usage mileage score based on the usage mileage ratio and the usage mileage base score; and determining the sum of the health state score, the calendar life score and the use mileage score as the life score of the power battery to be rated.

Here, the life parameter may refer to a parameter for determining a life score of a power battery to be rated.

The health state is determined by the residual cycle number of the power battery to be evaluated, and can be obtained by calculating the ratio of the residual cycle number of the battery to the total cycle number of the battery.

The parameter value of the state of health of the power battery to be evaluated can be determined by an ohmic internal resistance, a cycle period method and a voltage trajectory method, and if the parameter value of the state of health is greater than or equal to a rated state of health parameter value, the state of health score can be calculated by the following formula:

=

（a

s-b), wherein,

a base score representing the health status is determined,

a value of a parameter representative of a state of health,

represents the health status score, a represents the health status coefficient, and b represents the health status base value. The nominal state of health parameter value is a numerical value of the state of health of the battery of the power battery prescribed by the country,

the values of a and b are set values, and those skilled in the art can select specific values according to actual situations, and the application is not limited herein.

The value of the calendar life is determined by evaluationThe rated calendar life parameter value is the service life of the power battery specified by the country, and the calendar life score can be calculated by the following formula:

=

（1-

/

) Wherein, in the step (A),

a parameter value representing a calendar life base score, D representing calendar life,

a value representative of a nominal calendar life parameter,

representing the calendar life score.

The used mileage refers to the driving mileage of a vehicle carrying the power battery to be rated, the used mileage is equal to the product of the charging and discharging times of the vehicle and the driving mileage after single charging and discharging under the condition that the power battery is not replaced by the vehicle, the used mileage can be determined by the driving mileage of the vehicle during the use of the power battery under the condition that the power battery is replaced by the vehicle, the rated used mileage parameter value is determined according to the product of the charging and discharging times specified by the country and the driving mileage after single charging and discharging, and the used mileage score can be calculated by the following formula:

=

（1-L/

) Wherein, in the step (A),

a parameter value representing a use mileage base score, L representing a use mileage,

a parameter value representing a rated mileage of use,

representing the use mileage score.

And after the health state score, the calendar life score and the use mileage score are calculated, determining the sum of the health state score, the calendar life score and the use mileage score as the life score of the power battery to be rated.

In an optional embodiment, the rating parameters further include safety parameters, the safety parameters include internal resistance parameters, consistency parameters, temperature parameters, protection parameters and insulation parameters, the consistency parameters include internal resistance consistency, capacitance consistency and voltage consistency, the temperature parameters include temperature tolerance, monomer maximum temperature rise, temperature difference, energy consumption, temperature rise rate and temperature fall rate, the protection parameters include protection circuit parameters, diaphragm safety parameters and scanning parameters, and the insulation parameters include battery high voltage insulation, battery anode insulation and battery cathode insulation; the step of determining the safety score of the power battery to be rated comprises the following steps: determining the ratio of the parameter value of the internal resistance parameter to the maximum allowable internal resistance value as the internal resistance ratio; determining the difference between the basic internal resistance score and the adjusted internal resistance ratio as an internal resistance score; for each consistency parameter, if the parameter value of the consistency parameter is in a target consistency interval corresponding to the consistency parameter, determining the difference value between the consistency basic score of the consistency parameter and the adjusted parameter value of the consistency parameter as the consistency score of the consistency parameter; for each temperature parameter, if the parameter value of the temperature parameter is in a target temperature interval corresponding to the temperature parameter, determining the difference value between the temperature basic score of the temperature parameter and the adjusted parameter value of the temperature parameter as the temperature score of the temperature parameter; determining a protection rating corresponding to a parameter value of each protection parameter and a protection score corresponding to the protection rating for each protection parameter; for each insulation parameter, if the parameter value of the insulation parameter is in a target insulation interval corresponding to the insulation parameter, determining the adjusted parameter value of the insulation parameter as an insulation score of the insulation parameter; and determining the internal resistance score, the consistency scores, the temperature scores, the protection scores and the sum of the insulation scores as the safety score of the power battery to be graded.

Here, the safety parameter may refer to a parameter for determining a safety score of the power battery to be rated.

The protection circuit parameters comprise circuit stability and component reliability. The circuit stability can refer to a simulation test result of the safety sensitivity and the stability of the protection circuit, the component reliability can refer to a quality reliability test result of safety key components, and the test results are obtained by measuring through a measuring instrument and comprise a high test result, a medium test result and a low test result.

The membrane safety parameters include material stability, material integrity. The material stability can refer to the test results of chemical stability, electrochemical stability and thermal stability of the material, and the material integrity can refer to the test results of closure, insulation, strength and physical integrity of the material, wherein the test results are obtained by measurement of a measuring instrument and comprise three types, namely high, medium and low.

The scanning parameters comprise the internal state of the single body, the gap between the single bodies and the state of a beam welding spot. The internal state of the single body can refer to the measurement result of the internal state of a typical single body, the measurement result comprises three types of normal state, strength aging and excessive aging, the gap between the single bodies can refer to the measurement result of the gap between the single batteries, the measurement result comprises three types of normal state, local expansion and large change, the welding spot state of the wire harness refers to the state measurement result of the wire harness and the welding spot on the power battery, and the measurement result comprises three types of normal state, local slight change and loosening or falling.

Specifically, parameter values of all safety parameters of the power battery to be rated can be obtained through a field measurement mode, and then safety rating of the power battery to be rated is calculated according to the parameter values of all the safety parameters.

In calculating the internal resistance score, it can be determined by the following formula:

=

（1-

/ N

) Wherein, in the step (A),

the basic score of the internal resistance is represented,

representing the charged and discharged times of the power battery, N representing the rated charged and discharged times of the power battery, R representing the measured value of the internal resistance,

represents the estimated maximum allowable internal resistance value,

representing the internal resistance score. Wherein R-

The ratio of the internal resistance to the internal resistance,

/ N

namely the adjusted internal resistance ratio. Here, the adjusted internal resistance ratio may also be obtained by calculating a product of the internal resistance ratio and a set parameter value.

When the consistency score, the temperature score and the insulation score are calculated, the section where the parameter value of each parameter is located can be determined, different sections correspond to different score calculation methods, if the parameter value of the consistency parameter is in the first section and the second section, the score of the parameter can be determined according to the preset score of the first section and the preset score of the second section corresponding to each parameter, and if the parameter value of the parameter is in the target section, the difference value between the basic score of the parameter and the adjusted parameter value of the parameter is determined as the score of the parameter. The parameter value of the adjusted parameter can be obtained by firstly calculating the difference value between the parameter value of the parameter and the target safety parameter value, and then taking the product of the difference value and the safety score coefficient value as the parameter value of the adjusted parameter.

When the protection score is calculated, the protection score of the protection parameter can be directly determined according to the interval where the parameter value of the protection parameter is located. Taking the security sensitivity and stability parameter as an example, the protection score of the first interval of the parameter is 5, the score of the target interval is 3, and the score of the second interval is 0.

The value ranges of the different intervals of each security parameter are described below with reference to table 3.

Table 3: and the value range table of different intervals of the safety parameters.

In an optional embodiment, the rating parameter further includes a performance parameter, the performance parameter includes a room temperature parameter and a charge and discharge parameter, the room temperature parameter includes a room temperature capacity, a room temperature high rate capacity, and a room temperature power, and the charge and discharge parameter includes a fast charge, a standard charge time, a charge efficiency, a standard discharge time, a maximum discharge current, and a discharge efficiency; the step of determining the performance score of the power battery to be rated comprises the following steps: for each room temperature parameter, determining the product of the room temperature ratio of the room temperature parameter and the room temperature basic score of the room temperature parameter as the room temperature score of the room temperature parameter, wherein the room temperature ratio of the room temperature parameter is the ratio of the parameter value of the room temperature parameter and the rated room temperature parameter value of the room temperature parameter; for each charge and discharge parameter, if the parameter value of the charge and discharge parameter is in a target charge and discharge interval corresponding to the charge and discharge parameter, determining the sum of the adjusted parameter value of the charge and discharge parameter and the charge and discharge basic score of the charge and discharge parameter as the charge and discharge score of the charge and discharge parameter; and determining the sum of the plurality of room temperature scores and the plurality of charge and discharge scores as the performance score of the power battery to be rated.

Here, the Room Temperature capacity parameter refers to a battery capacity at a Room Temperature (RT) ambient Temperature, the Room Temperature high rate capacity parameter refers to a rate discharge capacity at the RT ambient Temperature, and the Room Temperature power parameter refers to a standard discharge power at the RT ambient Temperature.

The fast charge parameter is used for reflecting the residual capacity of the power battery under fast charge, and is the ratio of the residual capacity of the power battery to the battery capacity, the standard charge time is the time for the power battery to be fully charged, the charge efficiency can be the ratio of the electric quantity in the discharge period to the electric quantity required by the power battery to be restored to the initial full charge state through charge, the standard discharge time is the time required by the power battery to be discharged, the maximum discharge current is the maximum current of the power battery in the discharge period, and the discharge efficiency can be the ratio of the actual electric quantity discharged to the terminal voltage under a certain discharge condition to the rated capacity.

And measuring the room temperature parameter of the power battery to be graded by using a measuring instrument aiming at each room temperature parameter to obtain the parameter value of each room temperature parameter, determining the ratio of the parameter value of the room temperature parameter to the rated room temperature parameter value as a room temperature ratio, and taking the product of the room temperature ratio and the room temperature parameter basic score as a room temperature score.

For each charge and discharge parameter, firstly determining the interval in which the parameter value of the charge and discharge parameter is located, wherein the charge and discharge scores corresponding to different intervals are different in method, if the parameter value of the charge and discharge parameter is in the first interval and the second interval, determining the charge and discharge score directly according to the first interval score and the second interval score of each charge and discharge parameter, if the parameter value of the charge and discharge parameter is in the target interval, taking the product of the parameter value of the charge and discharge parameter and the charge and discharge score coefficient value as the parameter value of the adjusted charge and discharge parameter, and taking the sum of the parameter value of the adjusted charge and discharge parameter and the charge and discharge basic score as the charge and discharge score of the charge and discharge parameter.

The value ranges of the different intervals of each charge and discharge parameter are described below with reference to table 4.

Table 4: and a value range table of different intervals of the charge and discharge parameters.

Wherein C in table 4 is the rate of the charge and discharge capacity of the power battery.

In an optional embodiment, the rating parameters further include appearance quality parameters, the appearance quality parameters include appearance state parameters, appearance parameters and polarity parameters, the appearance parameters include definition and quality size consistency, and the polarity parameters include polarity definition level and tab damage level; the step of determining the appearance quality score of the power battery to be rated comprises the following steps: determining an appearance state grade corresponding to the parameter value of the appearance state parameter and an appearance state score corresponding to the appearance state grade; determining the appearance grade corresponding to the parameter value of each appearance parameter and the appearance grade corresponding to the appearance grade for each appearance parameter; for each polarity parameter, determining a polarity rating corresponding to the parameter value of the polarity parameter and a polarity score corresponding to the polarity rating; and determining the sum of the appearance state score, the appearance scores and the polarity scores as the appearance quality score of the power battery to be graded.

Here, the image of the power battery to be rated can be analyzed by the image recognition instrument, and the numerical values of various appearance quality parameters of the power battery to be rated can be determined.

The appearance state parameter is used for characterizing the parameter of the appearance state of the power battery to be evaluated, and the appearance state can characterize the undamaged degree of the appearance of the power battery to be evaluated, such as: whether the surface has burrs, trauma and dirt.

The definition is used for representing whether the identification and the code of the power battery to be rated are clear and complete, and the quality and size consistency is used for representing whether the quality and the size of the power battery to be rated are consistent with the product specification.

The polarity clear level is used for representing whether the terminal polarity identification of the power battery to be evaluated is correct and clear, and the tab damage level is used for representing the corrosion, pollution, burning and loosening degrees of the tab and the wire harness joint of the power battery to be evaluated.

Specifically, for each appearance quality parameter, determining a rating corresponding to a parameter value of the appearance quality parameter, determining a score corresponding to the rating as an appearance quality score of the appearance quality parameter, and determining the sum of all the appearance quality scores as the appearance quality score of the power battery to be rated. Wherein the appearance quality score comprises an appearance state score, a plurality of appearance scores and a plurality of polarity scores.

The rating criteria for the different ratings for each appearance quality parameter are described below with reference to table 5.

Table 5: and the appearance quality parameters are graded according to different grades.

Compared with the power battery rating determination method in the prior art, the power battery rating determination method has the advantages that the manufacturing level of the power battery can be comprehensively evaluated through design parameters, material parameters, process parameters and brand parameters, meanwhile, the service condition of the power battery can be evaluated through a plurality of service scores, so that when the state of the power battery is evaluated, the manufacturing level of the power battery and the multi-latitude of the service condition of the power battery can be comprehensively evaluated from the congenital manufacturing level and the postnatal latitude, and the problem that the state of the power battery cannot be comprehensively and accurately evaluated is solved.

Based on the same inventive concept, the embodiment of the present application further provides a power battery rating determining apparatus corresponding to the power battery rating determining method, and as the principle of the apparatus in the embodiment of the present application for solving the problem is similar to that of the power battery rating determining method in the embodiment of the present application, the implementation of the apparatus may refer to the implementation of the method, and repeated details are omitted.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a power battery rating determination apparatus according to an embodiment of the present disclosure. As shown in fig. 2, the power battery rating determination apparatus 200 includes:

the data acquisition module 201 is used for acquiring parameter values of rating parameters corresponding to the power battery to be rated, wherein the rating parameters comprise manufacturing parameters, and the manufacturing parameters comprise design parameters, material parameters, process parameters and brand parameters;

a data calculation module 202, configured to determine, for each manufacturing parameter, a difference between a parameter value of the manufacturing parameter and a target manufacturing parameter value as an offset value of the manufacturing parameter if the parameter value of the manufacturing parameter is within a corresponding target interval of the manufacturing parameter;

the manufacturing score determining module 203 is used for determining the manufacturing score of the power battery to be evaluated based on the offset value of each manufacturing parameter, the score coefficient value corresponding to each manufacturing parameter and the manufacturing base score of each manufacturing parameter;

the rating determining module 204 is configured to determine a plurality of usage scores, and determine a rating of the power battery to be rated by using the manufacturing score, the plurality of usage scores and a rating condition corresponding to each rating, where the plurality of usage scores include a life score, a safety score, a performance score, an appearance quality score and a personalized score.

Referring to fig. 3, fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure. As shown in fig. 3, the electronic device 300 includes a processor 310, a memory 320, and a bus 330.

The memory 320 stores machine-readable instructions executable by the processor 310, when the electronic device 300 runs, the processor 310 and the memory 320 communicate through the bus 330, and when the machine-readable instructions are executed by the processor 310, the steps of the method for determining a rating of a power battery in the embodiment of the method shown in fig. 1 may be executed.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present application, and are used for illustrating the technical solutions of the present application, but not limiting the same, and the scope of the present application is not limited thereto, and although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still make modifications or changes to the embodiments described in the foregoing embodiments, or make equivalent substitutions for some features, within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the exemplary embodiments of the present application, and are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A power cell rating determination method, comprising:

obtaining parameter values of rating parameters corresponding to the power battery to be rated, wherein the rating parameters comprise manufacturing parameters, and the manufacturing parameters comprise design parameters, material parameters, process parameters and brand parameters;

for each manufacturing parameter, if the parameter value of the manufacturing parameter is in the target interval of the manufacturing parameter, determining the difference value between the parameter value of the manufacturing parameter and the target manufacturing parameter value as the offset value of the manufacturing parameter;

determining a plurality of usage scores, and determining the rating of the power battery to be rated by using the manufacturing score, the usage scores and rating conditions corresponding to the ratings, wherein the usage scores comprise a life score, a safety score, a performance score, an appearance quality score and a personalized score;

the design parameters are used for representing the design level of the power battery to be evaluated, and comprise mass specific energy, volumetric specific energy, specific power, charge retention rate, capacity recovery capacity and self-discharge rate;

the material parameters comprise the energy density of the anode material and the tap density of the cathode material;

the process parameters are used for representing the process manufacturing level of the power battery to be evaluated, and comprise the material utilization rate, the consistency variation coefficient, the first-time qualified rate and the single manufacturing cost;

the brand parameters are used for representing the brand quality of the power battery to be evaluated, and comprise market share, unit energy cost, the number of invented patents, technical research and development investment and fault rate;

the method for determining the manufacturing score of the power battery to be evaluated based on the deviation value of each manufacturing parameter, the scoring coefficient value corresponding to each manufacturing parameter and the basic score of each manufacturing parameter comprises the following steps:

for each manufacturing parameter, determining a product of the offset value of the manufacturing parameter and a score weight value corresponding to the manufacturing parameter as a floating score;

determining, for each manufacturing parameter, a manufacturing parameter score for the manufacturing parameter as a sum of the floating score for the manufacturing parameter and the manufacturing base score for the manufacturing parameter;

and determining the sum of the plurality of manufacturing parameter scores as the manufacturing score of the power battery to be graded.

2. The method of claim 1, wherein determining a plurality of usage scores and determining a rating of the power battery to be rated using the manufacturing score, the plurality of usage scores, and a rating condition corresponding to each rating comprises:

multiplying the service life score, the safety score, the performance score, the manufacturing score, the appearance quality score and the personalized score by the score weight of each score respectively, and determining the sum of the products as the total score of the power battery to be rated;

determining a target scoring interval where the total score of the power battery to be scored is located;

and determining the rating of the power battery to be rated based on the rating corresponding to the target rating interval and the rating condition corresponding to each rating.

3. The method of claim 1, wherein the rating parameters further comprise personalization parameters, the personalization parameters comprising an application parameter, an environmental parameter, and a maintenance parameter;

the step of determining the personalized score of the power battery to be rated comprises the following steps:

determining personalized ratings respectively corresponding to the application parameters, the environment parameters and the maintenance parameters;

aiming at each personalized parameter, determining a single personalized score corresponding to the personalized parameter according to the personalized rating corresponding to the personalized parameter;

and determining the sum of the plurality of individual personalized scores as the personalized score of the power battery to be rated.

4. The method of claim 1, wherein the rating parameters further comprise lifetime parameters, the lifetime parameters comprising health status, calendar lifetime, and mileage used;

the step of determining the service life score of the power battery to be evaluated comprises the following steps:

determining whether the parameter value of the state of health is not less than a nominal state of health parameter value;

if the parameter value is not less than the rated health state parameter value, determining a health state score based on the parameter value of the health state and the health state basic score;

determining the ratio of the parameter value of the calendar life to the parameter value of the rated calendar life as the ratio of the calendar life;

determining a calendar life score based on the calendar life ratio and the calendar life basic score;

determining the ratio of the parameter value of the service mileage to the parameter value of the rated service mileage as a service mileage ratio;

determining a usage mileage score based on the usage mileage ratio and a usage mileage base score;

and determining the sum of the health state score, the calendar life score and the use mileage score as the life score of the power battery to be rated.

5. The method of claim 1, wherein the rating parameters further comprise safety parameters, the safety parameters comprise internal resistance parameters, consistency parameters, temperature parameters, protection parameters and insulation parameters, the consistency parameters comprise internal resistance consistency, capacitance consistency and voltage consistency, the temperature parameters comprise temperature tolerance difference, monomer maximum temperature rise, temperature difference, energy consumption, temperature rise rate and temperature drop rate, the protection parameters comprise protection circuit parameters, membrane safety parameters and scanning parameters, and the insulation parameters comprise high voltage insulation of the battery, positive electrode insulation of the battery and negative electrode insulation of the battery;

the step of determining the safety score of the power battery to be evaluated comprises the following steps:

determining the ratio of the parameter value of the internal resistance parameter to the maximum allowable internal resistance value as an internal resistance ratio;

determining the difference between the basic internal resistance score and the adjusted internal resistance ratio as an internal resistance score;

for each consistency parameter, if the parameter value of the consistency parameter is in a target consistency interval corresponding to the consistency parameter, determining the difference value between the consistency basic score of the consistency parameter and the adjusted parameter value of the consistency parameter as the consistency score of the consistency parameter;

for each temperature parameter, if the parameter value of the temperature parameter is in a target temperature interval corresponding to the temperature parameter, determining the difference value between the temperature basic score of the temperature parameter and the adjusted parameter value of the temperature parameter as the temperature score of the temperature parameter;

for each protection parameter, determining a protection rating corresponding to a parameter value of the protection parameter and a protection score corresponding to the protection rating;

for each insulation parameter, if the parameter value of the insulation parameter is in a target insulation interval corresponding to the insulation parameter, determining the adjusted parameter value of the insulation parameter as an insulation score of the insulation parameter;

and determining the sum of the internal resistance score, the consistency scores, the temperature scores, the protection scores and the insulation scores as the safety score of the power battery to be graded.

6. The method of claim 1, wherein the rating parameters further comprise performance parameters, the performance parameters comprise room temperature parameters and charge and discharge parameters, the room temperature parameters comprise room temperature capacity, room temperature high rate capacity, room temperature power, the charge and discharge parameters comprise fast charge, standard charge time, charge efficiency, standard discharge time, maximum discharge current, and discharge efficiency;

the step of determining the performance score of the power battery to be evaluated comprises the following steps:

for each room temperature parameter, determining the product of the room temperature ratio of the room temperature parameter and the room temperature basic score of the room temperature parameter as the room temperature score of the room temperature parameter, wherein the room temperature ratio is the ratio of the parameter value of the room temperature parameter and the rated room temperature parameter value of the room temperature parameter;

for each charge and discharge parameter, if the parameter value of the charge and discharge parameter is in a target charge and discharge interval corresponding to the charge and discharge parameter, determining the sum of the adjusted parameter value of the charge and discharge parameter and the charge and discharge basic score of the charge and discharge parameter as the charge and discharge score of the charge and discharge parameter;

and determining the sum of the plurality of room temperature scores and the plurality of charge and discharge scores as the performance score of the power battery to be graded.

7. The method of claim 1, wherein the rating parameters further comprise appearance quality parameters, the appearance quality parameters comprising appearance status parameters, form parameters comprising clarity and mass dimensional uniformity, and polarity parameters comprising a polarity clarity level and a tab damage level;

the step of determining the appearance quality score of the power battery to be evaluated comprises the following steps:

determining an appearance state rating corresponding to a parameter value of an appearance state parameter and an appearance state score corresponding to the appearance state rating;

for each appearance parameter, determining an appearance grade corresponding to the parameter value of the appearance parameter and an appearance score corresponding to the appearance grade;

for each polarity parameter, determining a polarity rating corresponding to a parameter value of the polarity parameter and a polarity score corresponding to the polarity rating;

and determining the appearance state score, the appearance scores and the sum of the polarity scores as the appearance quality score of the power battery to be graded.

8. A power cell rating determination apparatus, comprising:

the data calculation module is used for determining the difference value between the parameter value of the manufacturing parameter and a target manufacturing parameter value as the offset value of the manufacturing parameter if the parameter value of the manufacturing parameter is in the target interval of the manufacturing parameter for each manufacturing parameter;

the rating determination module is used for determining a plurality of usage scores and determining the rating of the power battery to be rated by using the manufacturing score, the usage scores and the rating conditions corresponding to the ratings, wherein the usage scores comprise a service life score, a safety score, a performance score, an appearance quality score and an individuation score;

the process parameters are used for representing the process manufacturing level of the power battery to be evaluated, and comprise material utilization rate, uniformity variation coefficient, first-time qualification rate and monomer manufacturing cost;

wherein the manufacturing score determining module is specifically configured to:

9. An electronic device, comprising: a processor, a storage medium and a bus, the storage medium storing machine-readable instructions executable by the processor, the processor and the storage medium communicating via the bus when the electronic device is operating, the processor executing the machine-readable instructions to perform the steps of the power battery rating determination method according to any one of claims 1 to 7.