A vehicle lightweighting and carbon reduction amount calculation method, device, equipment and medium

Abstract

The application discloses a vehicle lightweight carbon reduction calculation method, device, equipment and medium, and relates to the technical field of automobile lightweight design. The method comprises the following steps: acquiring vehicle lightweight design parameters; calculating fuel reduction of a vehicle driving stage according to the vehicle lightweight design parameters; calculating the weight reduction quality of the vehicle after lightweight design of vehicle parts; calculating the life cycle carbon emission before and after one-time weight reduction of the vehicle parts; and calculating the carbon emission reduction of the vehicle after lightweight design according to the life cycle carbon emission before and after one-time weight reduction of the vehicle parts, the fuel reduction of the vehicle driving stage, and the weight reduction quality of the vehicle after lightweight design of the vehicle parts. The application can accurately calculate the carbon reduction of the vehicle after lightweight design.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile lightweight design, in particular to a vehicle lightweight carbon reduction calculation method, device, equipment and medium. BACKGROUND

[0002] Lightweight design is an effective measure to reduce the carbon emissions of automobile products in the life cycle and promote energy saving and emission reduction in the automobile industry chain, which meets the development needs of carbon reduction in the upstream and downstream of the automobile industry. Common automobile weight reduction schemes mainly involve process greening, material lightweighting and structure rationalization. The application of lightweight low-carbon materials and green production schemes can create environmental benefits in the four stages of material acquisition and production, component manufacturing, vehicle use and End-of-Life (EOL).

[0003] The main problem of the current domestic vehicle lightweight environmental benefit accounting method is the lack of localized calculation of environmental impact related parameters (such as vehicle lightweight carbon reduction) in the vehicle driving stage, which ultimately leads to incomplete carbon reduction accounting boundaries and inaccurate accounting results. SUMMARY

[0004] The purpose of the present application is to provide a vehicle lightweight carbon reduction calculation method, device, equipment and medium, which can accurately calculate the carbon reduction of the vehicle after lightweighting.

[0005] To achieve the above purpose, the present application provides the following solutions.

[0006] In a first aspect, the present application provides a vehicle lightweight carbon reduction calculation method, comprising the following steps.

[0007] Obtain vehicle lightweight design parameters.

[0008] Calculate the fuel reduction amount in the vehicle driving stage according to the vehicle lightweight design parameters.

[0009] Calculate the vehicle weight reduction mass after lightweighting of the vehicle components.

[0010] Calculate the life cycle carbon emissions before and after the first weight reduction of the vehicle components.

[0011] According to the life cycle carbon emissions before and after the first weight reduction of the vehicle components, the fuel reduction amount in the vehicle driving stage and the vehicle weight reduction mass after lightweighting of the vehicle components, calculate the carbon emission reduction amount after lightweighting of the vehicle.

[0012] In a second aspect, the present application provides a vehicle lightweight carbon reduction calculation device, comprising the following modules.

[0013] The lightweight parameter acquisition module is configured to obtain vehicle lightweight design parameters.

[0014] The fuel reduction calculation module is used to calculate the fuel reduction during vehicle operation based on the vehicle lightweight design parameters.

[0015] The weight reduction calculation module is used to calculate the weight reduction of a vehicle after the lightweighting of its components.

[0016] The carbon emission calculation module before and after a single weight reduction is used to calculate the life cycle carbon emissions of vehicle parts before and after a single weight reduction.

[0017] The carbon emission reduction calculation module is used to calculate the carbon emission reduction after vehicle lightweighting based on the life cycle carbon emissions before and after a single weight reduction of vehicle components, the fuel reduction during vehicle operation, and the vehicle weight reduction mass after the weight reduction of vehicle components.

[0018] Thirdly, this application provides a computer device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the above-described method for calculating carbon reduction in vehicle lightweighting.

[0019] Fourthly, this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-described method for calculating carbon reduction in vehicle lightweighting.

[0020] Based on the specific embodiments provided in this application, the following technical effects are disclosed.

[0021] This application provides a method, apparatus, equipment, and medium for calculating carbon reduction through vehicle lightweighting. It obtains vehicle lightweighting design parameters; calculates fuel reduction during vehicle operation based on these parameters; calculates the vehicle's weight reduction after lightweighting of vehicle components; calculates the lifecycle carbon emissions of vehicle components before and after a single weight reduction; and calculates the carbon emission reduction after vehicle lightweighting based on the lifecycle carbon emissions before and after a single weight reduction, the fuel reduction during vehicle operation, and the vehicle's weight reduction after lightweighting. This application proposes a novel method for calculating carbon reduction through lightweighting, measuring the reduction in energy consumption (fuel or electricity) during vehicle operation after lightweighting design, and then calculating the carbon reduction benefits of the lightweighting scheme during the usage phase. It can scientifically and systematically quantify the lifecycle carbon emission reduction after vehicle weight reduction relative to before weight reduction, and can accurately calculate the carbon reduction after vehicle lightweighting. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the 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.

[0023] Figure 1 This is an application environment diagram of a method for calculating carbon reduction in vehicle lightweighting according to an embodiment of this application.

[0024] Figure 2 This is a flowchart illustrating a method for calculating carbon reduction in vehicle lightweighting, as provided in an embodiment of this application.

[0025] Figure 3 This is a schematic diagram illustrating the technical concept of a method for calculating carbon reduction in vehicle lightweighting, as provided in an embodiment of this application.

[0026] Figure 4 This is a calculation logic diagram of the weight reduction of a power battery system provided in an embodiment of this application.

[0027] Figure 5 This is a schematic diagram of the functional modules of a vehicle lightweight carbon reduction calculation device provided in an embodiment of this application.

[0028] Figure 6 This is a schematic diagram of the structure of a computer device provided in an embodiment of this application. Detailed Implementation

[0029] 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, and 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.

[0030] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] The method for calculating carbon reduction in vehicle lightweighting provided in this application can be applied to, for example... Figure 1In the application environment shown, the terminal communicates with the server via a network. A data storage system stores the data the server needs to process. This data storage system can be set up independently, integrated into the server, or located in the cloud or on another server. The terminal can send vehicle lightweight design parameters to the server. Upon receiving these parameters, the server calculates the vehicle's fuel reduction; calculates the vehicle's weight reduction after lightweighting vehicle components; calculates the lifecycle carbon emissions before and after a single weight reduction of vehicle components; and calculates the carbon emission reduction after vehicle lightweighting based on the lifecycle carbon emissions before and after a single weight reduction of vehicle components, the fuel reduction during vehicle operation, and the vehicle's weight reduction after lightweighting vehicle components. The server can then feed back the obtained carbon emission reduction to the terminal. Furthermore, in some embodiments, the method for calculating vehicle lightweight carbon reduction can be implemented independently by the server or the terminal. For example, the terminal can directly calculate the vehicle lightweight carbon reduction based on the vehicle lightweight design parameters, or the server can obtain the vehicle lightweight design parameters from the data storage system and perform the calculation.

[0032] The terminal can be, but is not limited to, various desktop computers, laptops, smartphones, tablets, IoT devices, and portable wearable devices. The server can be a standalone server or a server cluster composed of multiple servers, or it can be a cloud server.

[0033] In one exemplary embodiment, such as Figure 2 As shown, a method for calculating carbon reduction through vehicle lightweighting is provided, which can also be called... Figure 3 The method for calculating carbon reduction benefits is executed by computer equipment, specifically by a terminal or server alone, or by both. In this embodiment, the method is applied to... Figure 1 The following steps, 101 to 105, are used as an example to illustrate the process of using a server in the example.

[0034] Step 101: Obtain vehicle lightweight design parameters.

[0035] Step 102: Calculate the fuel reduction during vehicle operation based on the vehicle lightweight design parameters.

[0036] Step 103: Calculate the vehicle weight reduction after the vehicle components are lightweighted.

[0037] For gasoline-powered vehicles, in step 103, the vehicle weight reduction after the lightweighting of vehicle components includes the primary weight reduction and the secondary weight reduction.

[0038] For electric vehicles, in step 103, the vehicle weight reduction after the vehicle components are lightweighted includes the primary weight reduction, the secondary weight reduction, and the vehicle battery weight reduction; the vehicle battery weight reduction is calculated based on the primary and secondary weight reductions.

[0039] Step 104: Calculate the lifecycle carbon emissions of vehicle components before and after a single weight reduction.

[0040] Step 105: Calculate the carbon emission reduction after vehicle lightweighting based on the life cycle carbon emissions before and after a single weight reduction of vehicle components, the fuel reduction during vehicle operation, and the weight reduction of the vehicle after the weight reduction of vehicle components.

[0041] For gasoline-powered vehicles, in step 105, the carbon emission reduction after vehicle lightweighting is calculated based on the life cycle carbon emissions before and after the first weight reduction of vehicle components, the fuel reduction during vehicle operation, and the secondary weight reduction of the vehicle in the vehicle weight reduction mass after vehicle component lightweighting.

[0042] For electric vehicles, in step 105, the carbon emission reduction after vehicle lightweighting is calculated based on the life cycle carbon emissions before and after the first weight reduction of vehicle components, the fuel reduction during vehicle operation, the secondary weight reduction of the vehicle after vehicle component lightweighting, and the weight reduction of the vehicle battery.

[0043] By implementing steps 101 to 105 above, this application proposes a novel method for calculating carbon reduction through lightweighting. It calculates the reduction in energy consumption (fuel or electricity) during the driving phase after lightweighting by using the vehicle's mechanical resistance formula and specific driving conditions, thereby verifying the carbon reduction benefits of the lightweighting solution during the usage phase. This application can scientifically and systematically quantify the life-cycle carbon emission reduction of a vehicle after weight reduction relative to its original state, accurately calculating the carbon reduction after vehicle lightweighting.

[0044] In another exemplary embodiment of this application, in step 101, the lightweight design parameters of the target vehicle model are compiled according to the actual situation (i.e., Figure 3 The calculation information includes the weight of lightweight components, vehicle curb weight, fuel consumption, energy consumption, driving range, battery system energy density, fuel calorific value, transmission efficiency, tire rolling resistance coefficient, and regenerative braking efficiency of the electric vehicle. Lightweight design parameters also include relevant information required for the LCA (Limited-Area Compression), such as the vehicle's total lifecycle mileage, the proposed specific driving conditions, LCA functional units, and LCA system boundaries. The relevant information for lightweight design parameters in this embodiment is shown in Table 1.

[0045] Table 1 Vehicle lightweight design parameters

[0046]

[0047] In Table 1, "body-in-white" refers to the body before painting, and is a general term for body structural components and body panels.

[0048] In another exemplary embodiment of this application, step 102, calculating the fuel reduction during vehicle operation based on the vehicle lightweight design parameters, specifically includes the following calculation process.

[0049] (2-1) Calculate the integral parameters of the vehicle driving condition based on the original data of CLTC-P, including the integral of time with respect to speed, the integral of time with respect to the square of speed, the integral of time with respect to the cube of speed, and the integral of time with respect to the product of acceleration and speed. The results are shown in Table 2 below.

[0050] Table 2 Calculation results of integral parameters for CLTC-P operating condition

[0051]

[0052] (2-2) Calculate the fuel reduction based on the equation of mechanical resistance of the vehicle and Newton's second law of motion. or fuel reduction , For fuel reduction in gasoline-powered vehicles, This represents the fuel reduction of electric vehicles. The specific calculation formulas are shown in equations (1), (2), (3), and (4).

[0053] (1).

[0054] In the formula, Energy consumption related to vehicle weight (L); The calorific value of fuel oil (MJ / L); For electric vehicles, this refers to the energy conversion efficiency of the electric vehicle's powertrain system. This refers to the transmission efficiency of the gearbox; for electric vehicles, it specifically refers to the transmission efficiency of the electric vehicle's gearbox. The rolling resistance coefficient (N); The rotational drag coefficient (N / m / s); The vehicle's speed (m / s); The energy ratio of work done for braking to work done for kinetic energy; For automotive braking energy regeneration efficiency; Vehicle acceleration (m / s²) 2 M represents the vehicle's curb weight (kg).

[0055] (2).

[0056] In the formula, Energy consumption (L) unrelated to vehicle mass; The air drag coefficient is N / (m / s). 2 α represents the energy demand (W) independent of speed, such as the energy demand of equipment like headlights, air conditioning, sensors, windshield wipers, and seat ventilation and heating.

[0057] The fuel reduction of a vehicle is calculated based on the following formula.

[0058] (3).

[0059] (4).

[0060] In the formula, Fuel reduction for gasoline-powered vehicles, expressed in L / (100km + 100kg); Fuel reduction for electric vehicles, expressed in kWh / (100km + 100kg); The total energy consumption of the vehicle includes electricity (kWh) and fuel (L); is the energy consumption rate, in equation (3) it is the fuel consumption rate, and in equation (4) it is the fuel consumption rate converted from electric energy consumption of electric vehicles, in L / 100km; M is the vehicle curb weight, in kg. This is the integral of time over velocity; Energy consumption related to vehicle weight; Energy consumption unrelated to vehicle mass, measured in liters (L). The fuel energy factor of gasoline is determined by the national standard GB / T 37340-2019 "Energy Consumption Conversion Method for Electric Vehicles". For example, the fuel energy factor of 92# gasoline is 0.1161L / kWh. The calculation results are shown in Table 3.

[0061] Table 3 ERV Calculation Results

[0062]

[0063] In another exemplary embodiment of this application, step 103, calculating the vehicle weight reduction in the lightweight design scheme of vehicle components, includes: obtaining the direct weight reduction value (primary weight reduction of the vehicle) in the lightweight design scheme of components; obtaining the weight reduction value caused by the adjustment of support components, transmission system, etc. after the vehicle is lightweighted (secondary weight reduction of the vehicle); and based on the fuel reduction amount... The numerical values ​​are used to calculate the weight reduction of battery materials (vehicle battery weight reduction) under the same driving range conditions after vehicle lightweighting, combined with the iterative relationship between vehicle body weight reduction and power battery weight. The total weight reduction is then calculated. Therefore, in step 103, when the vehicle is an electric vehicle, the vehicle weight reduction after lightweighting of vehicle components is calculated, specifically including the following steps.

[0064] (3-1) Calculate the vehicle's initial weight reduction after the lightweighting of vehicle components. Table 4 shows specific numerical examples of the vehicle's initial weight reduction.

[0065] Table 4. Vehicle weight reduction after lightweighting of vehicle components

[0066]

[0067] (3-2) Calculate the secondary weight reduction of the vehicle after the lightweighting of vehicle parts.

[0068] The secondary weight reduction of the vehicle was determined based on an empirical coefficient (12.2% of the vehicle's initial weight reduction). The specific numerical results are shown in Table 4.

[0069] (3-3) Calculate the battery weight reduction under the same driving range condition after vehicle lightweighting based on the vehicle's primary weight reduction, secondary weight reduction, fuel reduction during vehicle operation, and total driving mileage throughout the vehicle's life cycle.

[0070] Specific numerical results for one example of battery weight reduction are shown in Table 4.

[0071] (3-4) Calculate the total vehicle weight reduction after the lightweighting of vehicle components based on the vehicle's primary weight reduction, secondary weight reduction, and battery weight reduction, as shown in Table 4.

[0072] In another exemplary embodiment of this application, in step (3-3) above, under the condition that the electric vehicle's range performance remains unchanged, vehicle weight reduction will lead to a decrease in the design capacity of the power battery. As part of the overall vehicle, the battery weight reduction caused by the reduced battery capacity will in turn affect the overall weight reduction of the vehicle. Using the calculated fuel reduction amount... As a result, the iterative relationship between vehicle weight reduction and power battery weight (e.g.) Figure 4 (As shown) Calculate the reduction in battery material weight (vehicle battery weight reduction) under the same driving range conditions after vehicle lightweighting design. Therefore, step (3-3) calculates the battery weight reduction under the same driving range conditions after vehicle lightweighting based on the vehicle's primary weight reduction, secondary weight reduction, fuel reduction during vehicle operation, and total vehicle lifecycle mileage. This specifically includes the following steps.

[0073] (1) Calculate the battery weight reduction under the same driving range condition after vehicle lightweighting based on the initial vehicle weight reduction, fuel reduction during vehicle operation, and vehicle life cycle mileage. The calculation formula is shown below.

[0074] .

[0075] In the above formula, The initial value of W is 0. RS,0 The initial vehicle weight reduction mass includes both the first and second weight reductions (kg); k is the number of iterations; W RB,k W represents the weight reduction (kg) of the power battery system in the k-th iteration. RS,k Let L be the total vehicle weight reduction (kg) in the k-th iteration; L be the vehicle's total lifespan mileage (km); and ED be the battery system energy density (kWh / kg).

[0076] It can be used to calculate the vehicle's weight reduction in W. RS,k The total energy savings (kWh) over the vehicle's entire lifecycle mileage of L (km) are calculated by dividing by the battery system's energy density and converting the units to obtain the corresponding battery weight reduction (W). RB,k .

[0077] (2) The sum of the current initial vehicle weight reduction and the current battery weight reduction is used as the updated vehicle weight reduction. That is... .

[0078] (3) Order Using the updated vehicle weight reduction as the initial vehicle weight reduction, return to the step "Calculate the battery weight reduction under the same driving range conditions after vehicle lightweighting based on the initial vehicle weight reduction, fuel reduction during vehicle operation, and total vehicle lifecycle mileage", until the difference between the current battery weight reduction and the previous battery weight reduction is less than or equal to the preset error. The final battery weight reduction is determined by the last calculated battery weight reduction.

[0079] As shown in the formula above, the value of k is incremented by 1 each time the battery weight reduction is calculated (i.e., each iteration), and the total vehicle weight reduction W... RS,k It will also be updated to the sum of the newly calculated battery weight reduction and the current total vehicle weight reduction, and will enter the next iteration.

[0080] .

[0081] As iterative calculations continue, the newly calculated battery weight reduction (W) RB,k ) and the previous battery weight reduction (W)RB,k-1 The value will continuously approach the target value; a preset error can be set. (Typically 0.001), and this is used as the condition for stopping the iterative calculation: when the difference between the newly calculated battery weight reduction and the previous battery weight reduction is less than or equal to the preset error. When the iteration stops, the latest calculated battery weight reduction result is output.

[0082] This application also proposes calculating battery weight reduction based on primary and secondary vehicle weight reduction, taking into account the relationship between electric vehicle battery weight reduction and vehicle lightweight design. This allows for the calculation of carbon emission reductions from three aspects: primary vehicle weight reduction, secondary vehicle weight reduction, and battery weight reduction. This application not only accurately calculates the carbon reduction after vehicle lightweighting but also solves the problem of incomplete calculation boundaries and inaccurate results caused by neglecting the relationship between electric vehicle battery weight reduction and vehicle lightweight design. This application can scientifically and systematically quantify the lifecycle carbon emission reduction after vehicle weight reduction relative to before weight reduction, improving the accuracy of carbon emission reduction calculations based on vehicle lightweight design.

[0083] In another exemplary embodiment of this application, step 104, calculating the lifecycle carbon emissions of vehicle components before and after a single weight reduction, specifically includes the following steps.

[0084] (4-1) Calculate the carbon emissions of the components involved in a vehicle’s weight reduction before and after the weight reduction in the material acquisition and production stages, and obtain the first carbon emissions of the vehicle before and after the weight reduction.

[0085] The carbon emissions of existing vehicle production schemes and components after a single vehicle weight reduction during the raw material acquisition and production stages are calculated based on the LCA method and the accounting method recommended by the IPCC (Intergovernmental Panel on Climate Change). The component lifecycle inventory of this embodiment is shown in Table 5. The carbon emissions of this stage are calculated according to formula (5), and the calculation results are listed in Table 6.

[0086] (5).

[0087] In the formula, Carbon emissions (kg CO2eq.) of the components involved in a single weight reduction before and after a single weight reduction in the material acquisition and production stages; This refers to the types and quantities of materials and energy consumed during this stage. =1,2,..., ; For material and energy activity data (kg, L, m) during this phase 3 wait); The carbon emission factors of materials and energy during this stage (kgCO2eq. / kg, kg CO2eq. / L, kg CO2eq. / m³) 3 wait).

[0088] Table 5 Component Lifecycle Inventory

[0089]

[0090] Table 6. Carbon Emission Calculation Results for Components (Unit: kg CO2eq.)

[0091]

[0092] (4-2) Calculate the carbon emissions of the components involved in the first weight reduction of the vehicle before and after the first weight reduction in the component manufacturing stage, and obtain the second carbon emissions of the vehicle before and after the first weight reduction.

[0093] The carbon emissions of the existing production scheme and the vehicle one-time weight reduction design scheme in the component manufacturing stage are calculated according to the LCA method and the accounting method recommended by IPCC. The calculation is carried out according to formula (6), and the accounting results are listed in Table 6.

[0094] (6).

[0095] In the formula, Carbon emissions (kg CO2eq.) of the components involved in a single weight reduction of a vehicle before and after a single weight reduction during the component manufacturing stage; This refers to the types and quantities of materials and energy consumed during this stage. =1,2,..., ; For material and energy activity data (kg, L, m) during this phase 3 wait); The carbon emission factors of materials and energy during this stage (kgCO2eq. / kg, kg CO2eq. / L, kg CO2eq. / m³) 3 wait).

[0096] (4-3) Calculate the energy consumption of the components involved in a single weight reduction of the vehicle before and after the weight reduction during the vehicle's driving phase.

[0097] Based on the calculated fuel reduction The energy consumption reduction of lightweight components during the service stage is calculated, and then the carbon emissions of the existing production scheme and the vehicle weight reduction design scheme during the service stage are calculated. Equations (7) and (8) are the calculation formulas for carbon emissions in this stage, and the calculation results are listed in Table 6.

[0098] (7).

[0099] In the formula, Energy consumption (kWh) of the components involved in a single weight reduction of a vehicle before and after the weight reduction during vehicle operation; For component weight (kg); The total mileage (km) throughout the entire lifecycle of the target vehicle model.

[0100] (4-4) Calculate the carbon emissions of the components involved in the weight reduction before and after the weight reduction during the use stage based on the energy consumption before and after the weight reduction, and obtain the third carbon emissions of the vehicle before and after the weight reduction.

[0101] (8).

[0102] In the formula, Carbon emissions (kgCO2eq.) of the components involved in a single weight reduction of a vehicle before and after a single weight reduction during the service phase; Carbon emission factor of electrical energy used by vehicles (kg CO2eq. / kWh).

[0103] If the vehicle is a gasoline vehicle, then the fuel reduction in formula (7) fuel reduction express.

[0104] (4-5) Calculate the carbon emissions of the components involved in the vehicle's weight reduction before and after the first weight reduction in the EOL stage, and obtain the fourth carbon emissions of the vehicle before and after the first weight reduction.

[0105] The carbon emissions of the existing vehicle production scheme and the vehicle one-time weight reduction design scheme in the EOL stage were calculated according to the LCA method and the IPCC recommended accounting method. The calculation was performed according to formula (9), and the accounting results are listed in Table 6.

[0106] (9).

[0107] In the formula, Carbon emissions (kgCO2eq.) of the components involved in a single weight reduction of a vehicle before and after a single weight reduction at the EOL stage; This refers to the types and quantities of materials and energy consumed during this stage. =1,2,..., ; For material and energy activity data (kg, L, m) during this phase 3 wait); The carbon emission factors of materials and energy during this stage (kgCO2eq. / kg, kg CO2eq. / L, kg CO2eq. / m³) 3 wait).

[0108] (4-6) Based on the first carbon emission before a vehicle’s first weight reduction, the second carbon emission before a vehicle’s first weight reduction, the third carbon emission before a vehicle’s first weight reduction, and the fourth carbon emission before a vehicle’s first weight reduction, the life cycle carbon emission before a vehicle’s first weight reduction can be obtained.

[0109] .

[0110] In the formula, Carbon emissions over the vehicle's lifecycle before a single weight reduction; , , , These represent the first carbon emission before a vehicle's weight reduction, the second carbon emission before a vehicle's weight reduction, the third carbon emission before a vehicle's weight reduction, and the fourth carbon emission before a vehicle's weight reduction, respectively.

[0111] (4-7) Based on the first carbon emission after a vehicle's first weight reduction, the second carbon emission after a vehicle's first weight reduction, the third carbon emission after a vehicle's first weight reduction, and the fourth carbon emission after a vehicle's first weight reduction, the life cycle carbon emission after a vehicle's first weight reduction can be obtained.

[0112] .

[0113] In the formula, The lifecycle carbon emissions after a single weight reduction; , , , These represent the first carbon emission after a single reduction in vehicle weight, the second carbon emission after a single reduction in vehicle weight, the third carbon emission after a single reduction in vehicle weight, and the fourth carbon emission after a single reduction in vehicle weight, respectively.

[0114] In another exemplary embodiment of this application, step 105 involves calculating the carbon emission reduction after vehicle lightweighting based on the lifecycle carbon emissions before and after a single weight reduction of vehicle components, the fuel reduction during vehicle operation, and the vehicle weight reduction mass after the lightweighting of vehicle components. This specifically includes the following steps.

[0115] (5-1) Calculate the carbon emission reduction after a single weight reduction of a vehicle based on the life cycle carbon emissions of the vehicle parts before and after a single weight reduction.

[0116] The difference between the total lifecycle carbon emissions of the existing baseline scheme and the design scheme after a single weight reduction of the vehicle is the carbon reduction amount after a single weight reduction of the vehicle. The calculation formula is shown in Equation (10), and the calculation results are listed in Table 7.

[0117] (10).

[0118] In the formula, The reduction in carbon emissions (kg CO2eq.) after a single weight reduction of the component; The lifecycle carbon emissions (kg CO2eq.) of components after a single weight reduction; The lifecycle carbon emissions (kg CO2eq.) for the existing baseline scheme for the components.

[0119] Table 7. Carbon Reduction Calculation Results of Lightweight Design Scheme (Unit: kg CO2eq.)

[0120]

[0121] (5-2) Calculate the carbon emission reduction after the second weight reduction of the vehicle based on the vehicle's secondary weight reduction in the vehicle's weight reduction after the vehicle parts are lightweighted and the fuel reduction during the vehicle's driving phase.

[0122] The carbon emission reductions from secondary vehicle weight reduction at the raw material acquisition and production stages and the end-of-life (EOL) stage were calculated using the LCA method. The carbon emission reduction during the vehicle's life cycle is calculated by summing the above results. The specific calculation formula is shown in Equation (11), and the calculation results are listed in Table 7.

[0123] (11).

[0124] In the formula, The carbon emission reduction (kg CO2eq.) of the secondary weight reduction of the components in the example embodiment; The second weight reduction of the vehicle (kg); Carbon emission factor (kg CO2eq. / kg) for secondary weight reduction materials used in vehicles; This represents the carbon emission factor of the vehicle's secondary weight reduction materials during the EOL (End of Life) stage. If the vehicle is a gasoline vehicle, then the fuel reduction amount in formula (11) is... fuel reduction express.

[0125] (5-3) Calculate the carbon emission reduction after the vehicle battery is reduced based on the weight reduction of the vehicle after the vehicle parts are lightweighted and the fuel reduction during the vehicle driving phase.

[0126] The carbon emission reductions from battery weight reduction during the raw material acquisition and production stages and the end-of-life (EOL) stage were calculated using the LCA method. The carbon emission reduction due to battery weight reduction during vehicle use is calculated by summing the above results. This summates the carbon emission reduction at each stage of the battery's life cycle. The specific calculation formula is shown in Equation (12), and the calculation results are listed in Table 7.

[0127] (12).

[0128] In the formula, The reduction in carbon emissions (kg CO2eq.) resulting from the weight reduction of the vehicle battery; Weight reduction (kg) of the battery system; The carbon emission factor of battery materials (kg CO2eq. / kg); The carbon emission factor of battery materials during the end-of-life (EOL) stage is expressed as (kg CO2eq. / kg).

[0129] (5-4) Calculate the carbon emission reduction after vehicle weight reduction based on the carbon emission reduction after the first weight reduction of the vehicle, the carbon emission reduction after the second weight reduction of the vehicle, and the carbon emission reduction after the weight reduction of the vehicle battery.

[0130] The total carbon reduction of the lightweighting scheme is calculated by summing the carbon reduction amounts of steps (5-1), (5-2), and (5-3). The calculation formula is shown in equation (13), and the calculation results are listed in Table 7.

[0131] (13).

[0132] In the formula, The final total result of carbon reduction for the lightweight design scheme (kg CO2eq.).

[0133] In this embodiment, a method for calculating vehicle lightweighting and carbon reduction considering the driving conditions of a vehicle is established based on the basic idea of ​​the LCA method. The weight reduction of the power battery system is calculated based on the iterative relationship between the vehicle body weight reduction and the power battery weight. The calculation scheme and related parameters are based on national standards or data recommended by authoritative departments. Compared with existing methods, this method can calculate more reasonable and accurate results for vehicle lightweighting and carbon reduction. Specific beneficial effects are as follows.

[0134] (1) Calculate fuel reduction based on vehicle driving conditions or fuel reduction The formula for vehicle driving mechanical resistance is derived from the national standard GB 18352.6-2016 "Limits and Measurement Methods for Pollutant Emissions from Light-Duty Vehicles (China VI)" and refers to the relevant resistance coefficients recommended by the Motor Vehicle Emission Monitoring Center of the Ministry of Ecology and Environment. Compared with existing calculation methods, it can obtain more accurate carbon reduction calculation results that are more applicable to China.

[0135] (2) The weight reduction of the power battery system is calculated based on the iterative relationship between the vehicle body weight reduction and the power battery weight under the condition that the driving range remains unchanged. This fills the gap in the iterative calculation method for power battery weight reduction and further improves the calculation boundary of the environmental benefits of lightweighting of new energy vehicles and its LCA analysis. This iterative method can provide some ideas for the relevant research work on electrification, lightweighting and decarbonization in the automotive industry, which is in line with the practical needs of the future development trend of the industry.

[0136] (3) This application is applicable to calculating the reduction in energy consumption and carbon emissions at each stage of the life cycle of a vehicle after lightweight design. Applicable vehicles include conventional internal combustion engine vehicles (ICEVs), battery electric vehicles (BEVs), hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles (PHEVs). Since the carbon emission reduction from vehicle lightweighting is indirectly calculated by calculating fuel or electricity savings, it can also be applied to specific case studies aimed at calculating other LCA environmental impact indicators such as acidification effects, human toxicity, and water toxicity. Furthermore, it is applicable to studies on macro-level carbon reduction and energy consumption benefits under factors such as changes in driving conditions, fuel type, power composition, and future policy trends. This can help researchers calculate scientifically reasonable basic carbon reduction results for vehicle lightweighting and provide accounting method support for other dimensions of analysis.

[0137] This application also provides an application scenario in which the above-described method for calculating carbon reduction in vehicle lightweighting is applied. Specifically, the method for calculating carbon reduction in vehicle lightweighting provided in this embodiment can be applied in a vehicle lightweighting design scenario. This scenario includes a parameter acquisition stage, a carbon reduction calculation stage, and a vehicle lightweighting optimization stage; the parameter acquisition stage is used to acquire lightweighting design parameters; the carbon reduction calculation stage is used to calculate the carbon reduction after vehicle lightweighting based on the acquired lightweighting design parameters; and the vehicle lightweighting optimization stage is used to optimize the lightweighting design scheme based on the carbon reduction after lightweighting. The carbon reduction calculation method for vehicle lightweighting provided in this embodiment belongs to the carbon reduction calculation stage.

[0138] Based on the same inventive concept, this application also provides a vehicle lightweighting and carbon reduction calculation device for implementing the above-mentioned vehicle lightweighting and carbon reduction calculation method. The solution provided by this device is similar to the solution described in the above-described method. Therefore, the specific limitations of one or more vehicle lightweighting and carbon reduction calculation device embodiments provided below can be found in the limitations of the vehicle lightweighting and carbon reduction calculation method described above, and will not be repeated here.

[0139] In one exemplary embodiment, such as Figure 5 As shown, a vehicle lightweight carbon reduction calculation device is provided, which includes the following modules.

[0140] The lightweight parameter acquisition module M1 is used to acquire vehicle lightweight design parameters.

[0141] The fuel reduction calculation module M2 is used to calculate the fuel reduction during vehicle operation based on the vehicle lightweight design parameters.

[0142] The weight reduction calculation module M3 is used to calculate the weight reduction of a vehicle after the lightweighting of its components.

[0143] The M4 module calculates carbon emissions before and after a single weight reduction, and is used to calculate the life cycle carbon emissions of vehicle parts before and after a single weight reduction.

[0144] The carbon emission reduction calculation module M5 is used to calculate the carbon emission reduction after vehicle lightweighting based on the life cycle carbon emissions before and after a single weight reduction of vehicle components, the fuel reduction during vehicle operation, and the vehicle weight reduction after the weight reduction of vehicle components.

[0145] In one exemplary embodiment, a computer device is provided, which may be a server or a terminal, and its internal structure diagram may be as follows. Figure 6As shown, this computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The database stores data for calculating vehicle lightweighting and carbon reduction. The I / O interfaces are used for exchanging information between the processor and external devices. The communication interface is used for communicating with external terminals via a network. When the computer program is executed by the processor, it implements a method for calculating vehicle lightweighting and carbon reduction.

[0146] Those skilled in the art will understand that Figure 6 The structures shown are merely block diagrams of some structures related to the present application and do not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than shown in the figures, or combine certain components, or have different component arrangements. In an exemplary embodiment, a computer device is provided, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments.

[0147] In one exemplary embodiment, a computer-readable storage medium is provided storing a computer program that, when executed by a processor, implements the steps in the above-described method embodiments.

[0148] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0149] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM).

[0150] The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0151] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0152] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for calculating carbon reduction through vehicle lightweighting, characterized in that, The method for calculating the carbon reduction amount of vehicle lightweighting includes: Obtain vehicle lightweight design parameters; The fuel reduction during vehicle operation is calculated based on the vehicle lightweight design parameters. Calculate the weight reduction of the vehicle after lightweighting of vehicle components; Calculate the lifecycle carbon emissions of vehicle parts before and after a single weight reduction; The carbon emission reduction after vehicle lightweighting is calculated based on the life cycle carbon emissions before and after a single weight reduction of vehicle components, the fuel reduction during vehicle operation, and the weight reduction of the vehicle after the weight reduction of vehicle components. The reduction in carbon emissions after vehicle lightweighting is calculated based on the lifecycle carbon emissions before and after a single weight reduction of vehicle components, the fuel reduction during vehicle operation, and the reduced vehicle weight after the weight reduction of vehicle components. Specifically, this includes: The reduction in carbon emissions after a single weight reduction of a vehicle is calculated based on the lifecycle carbon emissions of the vehicle components before and after a single weight reduction. The carbon emission reduction after secondary weight reduction is calculated based on the secondary weight reduction of the vehicle after the vehicle parts are lightweighted and the fuel reduction during the vehicle driving phase. The carbon emission reduction after reducing the weight of the vehicle battery is calculated based on the weight reduction of the vehicle after the weight reduction of vehicle components and the fuel reduction during vehicle operation. The carbon emission reduction after vehicle lightweighting is calculated based on the carbon emission reduction after one round of vehicle weight reduction, the carbon emission reduction after two rounds of vehicle weight reduction, and the carbon emission reduction after reducing the weight of the vehicle battery.

2. The method for calculating carbon reduction in vehicle lightweighting according to claim 1, characterized in that, When the vehicle is an electric vehicle, the weight reduction of the vehicle after the lightweighting of vehicle components is calculated, specifically including: Calculate the weight reduction of the vehicle after lightweighting of vehicle components; Calculate the secondary weight reduction of the vehicle after the lightweighting of vehicle components; The battery weight reduction under the same driving range condition after vehicle lightweighting is calculated based on the vehicle's primary weight reduction after vehicle component lightweighting, secondary weight reduction after vehicle lightweighting, fuel reduction during vehicle driving, and vehicle's total life cycle mileage. The total vehicle weight reduction after lightweighting is calculated based on the primary weight reduction, secondary weight reduction, and battery weight reduction of the vehicle components.

3. The method for calculating carbon reduction in vehicle lightweighting according to claim 2, characterized in that, The battery weight reduction under the same driving range condition after vehicle lightweighting is calculated based on the primary weight reduction of the vehicle after component lightweighting, the secondary weight reduction of the vehicle, the fuel reduction during vehicle operation, and the total driving mileage of the vehicle throughout its life cycle. Specifically, this includes: The battery weight reduction after vehicle lightweighting is calculated based on the initial vehicle weight reduction, fuel reduction during vehicle operation, and vehicle life cycle mileage. The initial vehicle weight reduction includes the primary weight reduction and secondary weight reduction of the vehicle after the lightweighting of vehicle components. The sum of the current initial vehicle weight reduction and the current battery weight reduction is used as the updated vehicle weight reduction. Using the updated vehicle weight reduction as the initial vehicle weight reduction, return to the step "Calculate the battery weight reduction under the same driving range conditions after vehicle lightweighting based on the initial vehicle weight reduction, fuel reduction during vehicle driving, and vehicle life cycle mileage" until the difference between the current battery weight reduction and the previous battery weight reduction is less than or equal to the preset error, and use the last calculated battery weight reduction as the final battery weight reduction.

4. The method for calculating carbon reduction in vehicle lightweighting according to claim 1 or 3, characterized in that, Calculate the lifecycle carbon emissions of vehicle components before and after a single weight reduction, specifically including: Calculate the carbon emissions of the components involved in a single vehicle weight reduction before and after the weight reduction in the material acquisition and production stages, and obtain the first carbon emissions of the vehicle before and after a single weight reduction. Calculate the carbon emissions of the components involved in a single weight reduction of a vehicle before and after the first weight reduction during the component manufacturing stage, and obtain the second carbon emissions of the vehicle before and after the first weight reduction. Calculate the energy consumption of the components involved in a single weight reduction of a vehicle before and after the weight reduction during vehicle operation; Based on the energy consumption before and after a weight reduction, calculate the carbon emissions of the components involved in the weight reduction during the usage phase before and after a weight reduction, and obtain the third carbon emissions of the vehicle before and after a weight reduction. Calculate the carbon emissions of the components involved in a single vehicle weight reduction before and after the first weight reduction in the EOL stage, and obtain the fourth carbon emissions of the vehicle before and after the first weight reduction. Based on the first carbon emission before a vehicle's first weight reduction, the second carbon emission before a vehicle's first weight reduction, the third carbon emission before a vehicle's first weight reduction, and the fourth carbon emission before a vehicle's first weight reduction, the life cycle carbon emission of a vehicle before a single weight reduction is calculated. The lifecycle carbon emissions of a vehicle after one round of weight reduction are calculated based on the first, second, third, and fourth carbon emissions after one round of weight reduction.

5. The method for calculating carbon reduction in vehicle lightweighting according to claim 4, characterized in that, The formula for calculating the reduction in carbon emissions after a second round of vehicle weight reduction is as follows: in, This refers to the reduction in carbon emissions after the vehicle undergoes a second weight reduction process. To reduce the weight of the vehicle in a second phase; Carbon emission factors of components and materials involved in secondary weight reduction of vehicles; Carbon emission factors of secondary weight reduction materials for vehicles during the end-of-life (EOL) stage; L represents the fuel reduction during the electric vehicle's driving phase; L represents the total driving mileage over the vehicle's entire lifecycle. Carbon emission factors of electrical energy used in vehicles.

6. The method for calculating carbon reduction in vehicle lightweighting according to claim 4, characterized in that, The formula for calculating the reduction in carbon emissions after reducing the weight of the vehicle battery is as follows: in, The reduction in carbon emissions resulting from weight reduction of vehicle batteries; To reduce battery weight; The carbon emission factor of battery materials; The carbon emission factor of battery materials in the EOL stage; L represents the fuel reduction during the electric vehicle's driving phase; L represents the total driving mileage over the vehicle's entire lifecycle. Carbon emission factors of electrical energy used in vehicles.

7. A device for calculating carbon reduction in vehicle lightweighting, characterized in that, The vehicle lightweight carbon reduction calculation device includes: The lightweight parameter acquisition module is used to acquire vehicle lightweight design parameters; The fuel reduction calculation module is used to calculate the fuel reduction during vehicle operation based on the vehicle lightweight design parameters. The weight reduction calculation module is used to calculate the vehicle weight reduction after the vehicle parts are lightweighted. The carbon emission calculation module before and after a single weight reduction is used to calculate the life cycle carbon emissions of vehicle parts before and after a single weight reduction. The carbon emission reduction calculation module is used to calculate the carbon emission reduction after vehicle lightweighting based on the life cycle carbon emissions before and after a single weight reduction of vehicle parts, the fuel reduction during vehicle operation, and the vehicle weight reduction after the weight reduction of vehicle parts. The reduction in carbon emissions after vehicle lightweighting is calculated based on the lifecycle carbon emissions before and after a single weight reduction of vehicle components, the fuel reduction during vehicle operation, and the reduced vehicle weight after the weight reduction of vehicle components. Specifically, this includes: The reduction in carbon emissions after a single weight reduction of a vehicle is calculated based on the lifecycle carbon emissions of the vehicle components before and after a single weight reduction. The carbon emission reduction after secondary weight reduction is calculated based on the secondary weight reduction of the vehicle after the vehicle parts are lightweighted and the fuel reduction during the vehicle driving phase. The carbon emission reduction after reducing the weight of the vehicle battery is calculated based on the weight reduction of the vehicle after the weight reduction of vehicle components and the fuel reduction during vehicle operation. The carbon emission reduction after vehicle lightweighting is calculated based on the carbon emission reduction after one round of vehicle weight reduction, the carbon emission reduction after two rounds of vehicle weight reduction, and the carbon emission reduction after reducing the weight of the vehicle battery.

8. A computer device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to implement the method for calculating carbon reduction in vehicle lightweighting as described in any one of claims 1-6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the method for calculating the carbon reduction of vehicle lightweighting as described in any one of claims 1-6.

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