Power battery design method based on carbon emission target value

Abstract

The present application relates to the technical field of vehicle control, and provides a power battery design method based on a carbon emission target value, comprising the following steps: S1, setting a carbon emission target value of a power battery; S2, estimating the carbon emission of the power battery according to power battery design parameters and historical data; S3, distributing the difference between the current carbon emission estimation value of the power battery and the carbon emission target value to each link of the power battery, and determining a carbon emission reduction scheme of the power battery. Through setting the target value of the carbon emission of the power battery, the present application distributes the carbon emission reduction amount to each link according to the difference between the estimation value and the target value, obtains the carbon emission reduction scheme of the power battery, analyzes the cost of each battery carbon emission reduction scheme, and realizes the design of a more economical power battery product meeting the carbon emission.

Description

Technical Field

[0001] This invention relates to the field of carbon emission technology and provides a power battery design method based on carbon emission target values. Background Technology

[0002] Against the backdrop of global resource scarcity and increasing environmental pollution, countries worldwide have set corresponding carbon reduction targets. For the automotive industry, energy transition is a breakthrough in solving the carbon emission problem. In recent years, the rapid development of new energy vehicles and the substantial increase in power battery consumption have brought about environmental and carbon emission issues that have become a focus of attention.

[0003] While new energy vehicles significantly reduce carbon emissions compared to gasoline vehicles, further reductions, approaching zero carbon emissions, and even achieving zero carbon emissions remain the future development trend of the automotive industry. Power batteries account for a large proportion of carbon emissions in new energy vehicles, and whether power batteries can achieve zero carbon emissions is crucial for the transformation of the electricity and transportation sectors.

[0004] There are currently various carbon reduction pathways for power batteries, but these carbon reduction technologies are more or less limited by economic factors. Considering economic benefits, they cannot all be applied immediately. It is necessary to weigh the balance between emission reduction effects and economic benefits. Summary of the Invention

[0005] In view of this, this application provides a power battery design method based on carbon emission target values, which minimizes carbon reduction costs while meeting carbon emission requirements.

[0006] Specifically, the following technical solutions are included:

[0007] On the one hand, a power battery design method based on carbon emission target values, the method specifically includes the following steps:

[0008] S1. Set the carbon emission target value for the power battery;

[0009] S2. Estimate the carbon emissions of the power battery based on the power battery design parameters and historical data;

[0010] S3. Allocate the difference between the current estimated carbon emissions of the power battery and the carbon emission target to each stage of the power battery, and determine the carbon emission reduction plan for the power battery.

[0011] In some embodiments, the process of determining the carbon emission reduction scheme for power batteries is as follows:

[0012] (31) Determine the contribution of each link to the carbon emissions of power batteries based on historical data, and take the links with large carbon emissions as emission reduction links.

[0013] (32) Allocate the carbon emission difference to each emission reduction stage according to the proportion, and determine the carbon emission reduction amount of each emission reduction stage;

[0014] (33) Determine the carbon emission reduction measures for all emission reduction stages. The combination of carbon emission reduction measures for each emission reduction stage to achieve the carbon emission reduction amount is the carbon emission reduction scheme for power batteries.

[0015] In some embodiments, the method further includes the following after step (33):

[0016] For each emission reduction stage, first obtain all combinations of carbon emission reduction methods that meet the carbon emission reduction targets, calculate the cost required to achieve carbon emission reduction for all combinations of carbon emission reduction methods, and select the combination of carbon emission reduction methods with the lowest cost.

[0017] The optimal carbon reduction scheme for power batteries is the combination of the lowest-cost carbon reduction methods across all emission reduction stages.

[0018] In some embodiments, the carbon emissions of power batteries are calculated in six stages, and the corresponding calculation formulas are as follows:

[0019] C 动力电池 =C 材料 +C 制造 +C 运输 +C 逸散 +C 拆解分拣 +C 废弃物处理 ;

[0020] In the formula, C 材料 C 制造 C 运输 C 逸散 C 拆解分拣 C 废弃物处理 These represent the carbon emissions of a power battery throughout its entire life cycle, specifically at the stages of material acquisition and pretreatment, transportation, dispersal, dismantling and sorting, and waste disposal. The power battery's entire life cycle consists of four stages: raw material acquisition and pretreatment, product manufacturing, product distribution, and end-of-life recycling.

[0021] In some embodiments, the carbon emissions C of the material 材料 The calculation formula is as follows:

[0022] C 材料 =∑(M 材料i ×CEF 材料i ×U 材料i );

[0023] Where: M 材料i CEF represents the weight of material i. 材料i U represents the carbon emission factor of material i. 材料iThis represents the usage coefficient of material i, which is the percentage of the material used in the manufacturing process in the vehicle.

[0024] In some embodiments, the carbon emissions C during the battery or material manufacturing process 制造 The calculation formula is as follows:

[0025] C 制造 =∑(Er×EFr+Er×NCVr×EFr′×1000);

[0026] In the formula: Er represents the amount of energy or fuel r used, EFr represents the carbon emission factor produced by energy or fuel r, NCVr represents the average lower heating value of energy or fuel r, and EFr′ represents the carbon emission factor used by energy or fuel r.

[0027] In some embodiments, the carbon emissions C during battery or material transportation 运输 The calculation formula is as follows:

[0028] C 运输 =∑(Mt×Lt×EFt);

[0029] In the formula: Mt represents the weight of the transported object using transport mode t, Lt represents the transport distance using transport mode t, and EFt represents the carbon emission factor using transport mode t.

[0030] In some embodiments, the greenhouse gas emissions C emitted by batteries or materials during manufacturing, transportation, and waste disposal are... 逸散 The calculation formula is as follows:

[0031] C 逸散 =M GHG ×GWP;

[0032] Where: M GHG It represents the amount of greenhouse gases emitted during the manufacturing, transportation, and disposal of batteries or materials; GWP represents the global warming potential corresponding to the emitted greenhouse gases, with CO2 having a global warming potential of 1.

[0033] In some embodiments, the carbon emissions C during the dismantling, crushing, and sorting of end-of-life batteries are... 拆解分拣 The calculation formula is as follows:

[0034] C 拆解分拣 =∑(Er×EFr+Er×NCVr×EFr'×1000);

[0035] In the formula: Er represents the amount of energy or fuel r used in dismantling, crushing and sorting; EFr represents the carbon emission factor produced by the energy or fuel r used in dismantling, crushing and sorting; NCVr represents the average lower heating value of the energy or fuel r used in dismantling, crushing and sorting; EFr' represents the carbon emission factor used in the energy or fuel r used in dismantling, crushing and sorting.

[0036] In some embodiments, the carbon emissions C during the waste treatment process generated from battery or material manufacturing, transportation, and disposal are... 废弃物处理 The calculation formula is as follows:

[0037] C 废弃物处理 =∑(M 废弃物 ×EFc);

[0038] Where: M 废弃物 The weight of the waste is indicated; EFc represents the carbon emission factor corresponding to different waste treatment methods.

[0039] This invention sets a target value for carbon emissions from power batteries, allocates carbon reduction amounts to each stage based on the difference between the estimated value and the target value, obtains a carbon reduction scheme for power batteries, analyzes the cost of each battery carbon reduction scheme, and achieves a more economical and efficient power battery product design that meets carbon emission requirements. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a flowchart of a power battery design method for carbon emission target values ​​provided in an embodiment of the present invention;

[0042] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by one of ordinary skill in the art.

[0045] To make the technical solution and advantages of this application clearer, the embodiments of this application will be further described in detail below with reference to the accompanying drawings. The flow of the power battery design method based on carbon emission target values ​​proposed in this invention is as follows: Figure 1 As shown, the method specifically includes the following steps:

[0046] S1. Set the carbon emission target value for the power battery;

[0047] In this embodiment of the invention, the carbon emission target value of the power battery can be set in the following ways: based on the carbon emission target of low-carbon vehicles, the carbon emission requirements of EU battery regulations, the company's dual-carbon strategy, customer requirements, etc.; wherein, the specific method for setting the carbon emission target value of the power battery based on the carbon emission target of low-carbon vehicles is as follows:

[0048] (1) Find the carbon emission limit of a car by its fuel type, model and curb weight. A car with a carbon emission limit below the limit is a low-carbon car.

[0049] (2) Considering that with the development of low-carbon technologies, the carbon emission factors of various industries related to automobiles, such as electricity, will be reduced to varying degrees, the carbon emission limit of automobiles is reduced by a certain percentage based on the year the model was launched, so as to obtain the current carbon emission limit of the automobile.

[0050] (3) Based on the current carbon emission limit of automobiles, the current carbon emission limit of power batteries is obtained according to the proportion of carbon emission of power batteries to carbon emission of vehicle models in historical data.

[0051] (4) Set the carbon emission target value of the power battery based on the current carbon emission limit of the power battery. The carbon emission target value of the power battery is lower than the current carbon emission limit of the power battery.

[0052] S2. Estimate the carbon emissions of the power battery based on its design parameters and historical data. The specific process for obtaining the carbon emission estimate of the power battery is as follows:

[0053] (21) Obtain the design parameters of the power battery, including materials, weight, energy consumption, greenhouse gas emissions, transportation mode, transportation distance, etc.

[0054] (22) The carbon emissions of power batteries are classified into six stages (processes) for calculation, resulting in the following more convenient carbon emission calculation formula:

[0055] C 动力电池 =C 材料 +C 制造 +C 运输 +C逸散 +C 拆解分拣 +C 废弃物处理 ;

[0056] In the formula, C 材料 C 制造 C 运输 C 逸散 C 拆解分拣 C 废弃物处理 These figures represent the carbon emissions of a power battery throughout its entire lifecycle, specifically in the stages of materials, manufacturing, transportation, dispersal, dismantling and sorting, and waste disposal, expressed in kilograms of carbon dioxide equivalent (kgCO2e). The power battery lifecycle consists of four stages: raw material acquisition and pretreatment, product manufacturing, product distribution, and end-of-life recycling. The following section focuses on C... 材料 C 制造 C 运输 C 逸散 C 拆解分拣 C 废弃物处理 The carbon emissions of the six types are explained in detail below:

[0057] (1) Carbon emissions of materials C 材料 The calculation formula is as follows:

[0058] C 材料 =∑(M 材料i ×CEF 材料i ×U 材料i );

[0059] Where: M 材料i The weight of material i is expressed in kilograms (kg); CEF 材料i U represents the carbon emission factor of material i, expressed in kilograms of carbon dioxide equivalent per kilogram (kgCO2e / kg); 材料i This represents the usage coefficient of material i, which is the percentage of material used in the manufacturing process in the vehicle. It is greater than 100% when losses are assumed.

[0060] (2) Carbon emissions from manufacturing C 制造 The calculation formula is as follows:

[0061] C 制造 =∑(Er×EFr+Er×NCVr×EFr′×1000);

[0062] In the formula: C 制造 Er represents the carbon emissions from the battery or material manufacturing process; Er represents the amount of energy or fuel used, measured in kilowatt-hours (kWh) or cubic meters (m³). 3) or kilogram (kg), etc.; EFr represents the carbon emission factor produced by energy or fuel r, with units of kilograms of carbon dioxide equivalent per kilowatt-hour (kgCO2e / kWh) or kilograms of carbon dioxide equivalent per cubic meter (kgCO2e / m³). 3 Or kilograms of carbon dioxide equivalent per kilogram (kgCO2e / kg); NCVr represents the average lower heating value of the energy or fuel. Units are gigajoules per ton (GJ / t) or gigajoules per 10,000 cubic meters (GJ / 10⁻⁶). 4 m 3 ); EFr′ represents the carbon emission factor of energy or fuel r used, in tons of carbon dioxide equivalent per gigajoul (tCO2e / GJ), and EFr′ for electricity use is 0.

[0063] (3) Carbon emissions from transportation C 运输 The calculation formula is as follows:

[0064] C 运输 =∑(Mt×Lt×EFt);

[0065] In the formula: C 运输 The carbon emissions during the transportation of batteries or materials are represented by Mt, which represents the weight of the transported object using transportation mode t, in kilograms (kg); Lt, which represents the transportation distance using transportation mode t, in kilometers (km); and EFt, which represents the carbon emission factor using transportation mode t, in kilogram CO2 equivalent per kilogram per kilometer [kgCO2e / (kg·km)].

[0066] (4) Emissions of carbon C 逸散 The calculation formula is as follows:

[0067] C 逸散 =M GHG ×GWP;

[0068] In the formula: C 逸散 This indicates the amount of greenhouse gas emissions (CO2e) generated during the manufacturing, transportation, and disposal of batteries or materials, expressed in kilograms of carbon dioxide equivalent (kgCO2e); M GHG It represents the amount of greenhouse gases emitted during the manufacturing, transportation, and disposal of batteries or materials, expressed in kilograms (kg); GWP represents the global warming potential corresponding to the emitted greenhouse gases, with CO2 having a global warming potential of 1.

[0069] (5) The formula for calculating carbon emissions from dismantling and sorting is as follows:

[0070] C 拆解分拣 =∑(Er×EFr+Er×NCVr×EFr'×1000);

[0071] In the formula: C 拆解分拣This indicates the carbon emissions from the dismantling, crushing, and sorting of end-of-life batteries, expressed in kilograms of carbon dioxide equivalent (kgCO2e).

[0072] Er represents the amount of energy or fuel (r) used in the dismantling, crushing, and sorting process, measured in kilowatt-hours (kWh) or cubic meters (m³). 3 or kilograms (kg), etc.;

[0073] EFr represents the carbon emission factor produced by dismantling, crushing, sorting, and inputting energy or fuel r, expressed in kilograms of carbon dioxide equivalent per kilowatt-hour (kgCO2e / kWh) or kilograms of carbon dioxide equivalent per cubic meter (kgCO2e / m³). 3 Or kilograms of carbon dioxide equivalent per kilogram (kgCO2e / kg);

[0074] NCVr represents the average lower heating value of energy or fuel input during dismantling, crushing, and sorting. The unit is gigajoules per ton (GJ / t) or gigajoules per 10,000 cubic meters (GJ / 10⁻⁶). 4 m 3 );

[0075] EFr' represents the carbon emission factor of dismantling, crushing, sorting and input into energy or fuel r, and the unit is tons of carbon dioxide equivalent per gigajoul (tCO2e / GJ). The EFr' of electricity production is 0.

[0076] (6) The formula for calculating the amount of waste treated and discharged is as follows:

[0077] C 废弃物处理 =∑(M 废弃物 ×EFc)

[0078] In the formula: C 废弃物处理 This indicates the carbon emissions generated during the disposal of waste from battery or material manufacturing, transportation, and disposal processes, expressed in kilograms of carbon dioxide equivalent (kgCO2e); M 废弃物 The weight of the waste is expressed in kilograms (kg); EFc represents the carbon emission factor corresponding to different waste treatment methods, expressed in kilogram CO2 e-equivalent per kilogram (kgCO2e / kg).

[0079] S3. Allocate the difference between the current estimated carbon emissions of the power battery and the target value to each stage, and determine the carbon emission reduction plan for the power battery.

[0080] In this embodiment of the invention, the process for determining the carbon emission reduction scheme for power batteries is as follows:

[0081] (31) Determine the contribution of each stage to the carbon emissions of power batteries based on historical data, and take the stage with the largest contribution to carbon emissions as the emission reduction stage.

[0082] (32) Allocate the carbon emission difference to each emission reduction stage according to the proportion, and determine the carbon emission reduction amount of each emission reduction stage;

[0083] (33) Determine the carbon emission reduction measures for all emission reduction stages. The combination of carbon emission reduction measures for each emission reduction stage to achieve the carbon emission reduction amount is the carbon emission reduction scheme for power batteries.

[0084] In this embodiment of the invention, there are multiple carbon reduction schemes that meet the carbon emission reduction requirements of power batteries. This invention selects the carbon reduction scheme with the lowest cost, and the specific method for obtaining it is as follows:

[0085] For each emission reduction stage, first obtain all combinations of carbon emission reduction methods that meet the carbon emission reduction target, calculate the cost required to achieve carbon emission reduction for all combinations, and select the carbon emission reduction method combination with the lowest cost. The carbon emission reduction method combination with the lowest cost for all emission reduction stages constitutes the optimal carbon emission reduction scheme for power batteries.

[0086] Taking a certain power battery as an example, the carbon emission contribution rate of the materials stage is about 90%, and the carbon emission contribution rate of the battery manufacturing stage is about 9%. Therefore, the materials stage and the manufacturing stage are considered as emission reduction stages. Taking the materials stage as an example, the emission reduction methods for materials include: the secondary use of power batteries; the use of green electricity; the use of recycled materials in materials such as steel, aluminum, plastics, and cathode materials; and the use of solid and semi-solid electrolytes. Assume that the combination of carbon emission reduction methods for the materials stage exists in the following two combinations:

[0087] Carbon emission reduction combination 1: Green electricity utilization rate A% in the battery cell production process, and recycled material utilization rate B% ​​in the cathode material production process; Carbon emission reduction combination 2: Green electricity utilization rate C% in the aluminum alloy production process, and recycled material utilization rate D% in the aluminum alloy material production process. The lowest cost carbon emission reduction combination is selected as the carbon emission reduction combination in the material stage, and the method for obtaining the lowest cost carbon emission reduction combination in the manufacturing stage is the same as above.

[0088] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0089] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0090] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A method for designing a power battery based on a carbon emission target value, characterized in that, The method specifically includes the following steps: S1. Set the carbon emission target value for the power battery; S2. Estimate the carbon emissions of the power battery based on the power battery design parameters and historical data; S3. Allocate the difference between the current estimated carbon emissions of the power battery and the carbon emission target to each stage of the power battery, and determine the carbon emission reduction plan for the power battery. The specific process for determining the carbon emission reduction scheme for power batteries is as follows: (31) Determine the contribution of each link to the carbon emissions of power batteries based on historical data, and take the links with large carbon emissions as emission reduction links; (32) Allocate the carbon emission difference to each emission reduction stage according to the proportion, and determine the carbon emission reduction amount of each emission reduction stage; (33) Determine the carbon emission reduction measures for all emission reduction stages. The combination of carbon emission reduction measures for each emission reduction stage to achieve the carbon emission reduction amount is the carbon emission reduction scheme for power batteries. The process includes the following after step (33): For each emission reduction stage, first obtain all combinations of carbon emission reduction methods that meet the carbon emission reduction targets, calculate the cost required to achieve carbon emission reduction for all combinations of carbon emission reduction methods, and select the combination of carbon emission reduction methods with the lowest cost. The optimal carbon reduction scheme for power batteries is the combination of the lowest-cost carbon reduction methods in all emission reduction stages. The carbon emissions of power batteries are calculated in six stages, and the corresponding calculation formulas are as follows: ； In the formula, , , , , , These represent the carbon emissions of a power battery throughout its entire life cycle, specifically at the stages of material acquisition and pretreatment, transportation, dispersal, dismantling and sorting, and waste disposal. The power battery's entire life cycle consists of four stages: raw material acquisition and pretreatment, product manufacturing, product distribution, and end-of-life recycling.

2. The power battery design method for the carbon emission target value as described in claim 1, characterized in that, Material carbon emissions The calculation formula is as follows: ； In the formula: This represents the weight of material i. This represents the carbon emission factor of material i. This represents the usage coefficient of material i, which is the percentage of the material used in the manufacturing process in the vehicle.

3. The power battery design method for the carbon emission target value as described in claim 1, characterized in that, Carbon emissions from battery or material manufacturing The calculation formula is as follows: ； In the formula: This indicates the amount of energy or fuel used, r. The carbon emission factor representing energy or fuel production. This represents the average lower heating value of the energy or fuel r. This indicates the carbon emission factor used for energy or fuel.

4. The power battery design method for the carbon emission target value as described in claim 1, characterized in that, Carbon emissions during battery or material transportation The calculation formula is as follows: ； In the formula: This represents the weight of the object being transported using transportation method t. This represents the transportation distance using transportation mode t. This represents the carbon emission factor based on transportation mode t.

5. The power battery design method for the carbon emission target value as described in claim 1, characterized in that, Greenhouse gas emissions from the manufacturing, transportation, and disposal of batteries or materials The calculation formula is as follows: ； In the formula: This indicates the amount of greenhouse gases emitted during the manufacturing, transportation, and disposal of batteries or materials. This represents the global warming potential corresponding to the emitted greenhouse gases; the global warming potential of CO2 is 1.

6. The power battery design method for the carbon emission target value as described in claim 1, characterized in that, Carbon emissions from the dismantling, crushing and sorting of end-of-life batteries The calculation formula is as follows: ； In the formula: This indicates the amount of energy or fuel (r) used in the dismantling, crushing, and sorting process; This indicates the carbon emission factor generated during the dismantling, crushing, sorting, and input of energy or fuel. This represents the average lower heating value of the energy or fuel input during dismantling, crushing, and sorting; This refers to the carbon emission factor of dismantling, crushing, sorting, and inputting energy or fuel.

7. The power battery design method for the carbon emission target value as described in claim 1, characterized in that, Carbon emissions from waste disposal during battery or material manufacturing, transportation, and disposal The calculation formula is as follows: ； In the formula: Indicates the weight of the waste; This indicates the carbon emission factor corresponding to different waste treatment methods.

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