AC charging pile carbon footprint accounting method and system

Abstract

The invention relates to an AC charging pile carbon footprint accounting method and system, and the method comprises the steps: S1, determining an evaluation unit according to an evaluation target, dividing the life cycle stage of a product, and determining the system boundary of an AC charging pile; s2, acquiring original data and greenhouse gas emission factors of each life cycle stage of the alternating current charging pile product; s3, calculating the life cycle carbon emission of the AC charging pile product; s4, when a system boundary is determined or data is collected, if input or output of at least one process comprises a plurality of products, carbon emission is distributed in the life cycle of the alternating current charging pile product; and S5, generating a carbon footprint report based on the evaluation unit, the system boundary and the total carbon emission amount. The clear and scientific AC charging pile carbon footprint accounting method is established to obtain accurate AC charging pile life cycle carbon footprint data, and the influence of each AC charging pile product on the environment can be objectively evaluated.

Description

Technical Field

[0001] The present invention relates to the technical field of product carbon footprint technology, and in particular to a carbon footprint calculation method and system for an AC charging pile. Background Art

[0002] The concept of carbon footprint comes from the "ecological footprint" proposed by ecological economist William E. Rees in 1992, which is mainly used to measure the impact of human activities on the environment. Carbon footprint is a kind of "ecological footprint", which reflects the amount of greenhouse gas emissions generated by economic activities. Using carbon footprint to measure the impact of carbon emissions from energy activities in human production and life on climate change is more vivid and scientific than the traditional carbon emissions. According to the application level of carbon footprint, carbon footprint can be divided into seven scales: country, city, organization, enterprise, family, product and individual. The product carbon footprint is the sum of carbon dioxide and other greenhouse gases emitted by a product or service throughout its life cycle. The carbon footprint in the product life cycle is crucial to the assessment of greenhouse gas emissions and is widely used in carbon dioxide accounting.

[0003] At present, the schemes used for domestic product carbon footprint assessment mainly refer to PAS2050 and ISO 14067, and there is no domestic carbon footprint assessment standard. These two standards have the common characteristics of product carbon footprint assessment and are suitable for the basic needs of domestic carbon footprint assessment. However, with the increase and refinement of the types of assessed products, the refinement standards and schemes of carbon footprint assessment also need to be followed up accordingly.

[0004] The power industry is a key area for carbon emission reduction. Analyzing the carbon footprint of power companies, equipment, products, and services, and further improving the carbon footprint accounting methods of key products, are critical to energy conservation and emission reduction in the power industry. With the rapid expansion of the electric vehicle market, the installation and use of AC charging piles as the infrastructure for charging electric vehicles has increased dramatically around the world. Accurately analyzing the life cycle carbon footprint of AC charging piles is of great significance to objectively assessing the impact of charging infrastructure on the environment. Although the existing carbon footprint evaluation standards provide general principles and directions for product carbon footprint accounting, they do not refine the carbon footprint accounting process for AC charging piles. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to provide a carbon footprint calculation method and system for an AC charging pile, so as to realize carbon footprint calculation for an AC charging pile.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] One aspect of the present invention provides a method for calculating the carbon footprint of an AC charging pile, comprising the following steps:

[0008] Step S1, determining the evaluation unit according to the evaluation target, dividing the product stages of the AC charging pile product, and determining the system boundary of the AC charging pile;

[0009] Step S2, obtaining the original data and greenhouse gas emission factors of each life cycle stage of the AC charging pile product;

[0010] Step S3, calculating the life cycle carbon emissions of the AC charging pile product;

[0011] Step S4, when determining the system boundary or collecting data, if the input or output of at least one process includes multiple products, the life cycle carbon emissions are allocated within the life cycle of the AC charging pile product.

[0012] As a preferred technical solution, the step S1 further includes:

[0013] Discard processes for which primary and secondary data are difficult to obtain, and / or processes or material flows that have a small impact on carbon emissions.

[0014] As a preferred technical solution, in step S2, the life cycle stages of the AC charging pile product include raw material acquisition stage, manufacturing stage, sales stage, use stage and disposal stage.

[0015] As a preferred technical solution, in the raw material acquisition stage, the original data includes energy mining, raw material production, intermediate materials, auxiliary material production, parts processing, packaging material production process data, raw material transportation, packaging material transportation, auxiliary material transportation process used in the vehicle type, fuel type, consumption, load and load ratio data;

[0016] In the manufacturing stage, the raw data include the consumption of raw materials and parts, the consumption of fuel, electricity, heat and other energy in the manufacturing process, the consumption of production water, the production of pollutant emissions, the waste treatment data in the manufacturing stage, and the storage and transportation emission data in the manufacturing stage;

[0017] In the sales stage, the raw data includes the type of transportation vehicle, transportation distance, type and amount of fuel consumed, load capacity and load ratio, and the amount of energy consumed by lighting environment control during storage and sales of the product;

[0018] In the use phase, the raw data includes power consumption data such as use standard scenario data, charging rate, energy efficiency and power;

[0019] In the waste stage, the raw data include waste weight, treatment method, product recovery rate, transportation method, transportation distance, transportation weight, greenhouse gas emissions per unit mileage, and energy consumed in the product waste, reprocessing, and parts remanufacturing processes.

[0020] As a preferred technical solution, in step S3, the life cycle carbon emissions are calculated using the following formula:

[0021]

[0022] in,

[0023] E t ——Total greenhouse gas emissions during the product life cycle, in kilograms of carbon dioxide equivalent;

[0024] E i ——Total greenhouse gas emissions at each stage of the product life cycle, in kilograms of carbon dioxide equivalent; i——each stage of the product life cycle;

[0025] AD – Activity data of a process;

[0026] EF——emission factor corresponding to a certain process;

[0027] GWP – Global Warming Potential;

[0028] j – Data on different types of activities at different stages of the product life cycle.

[0029] As a preferred technical solution, in step S4, the process of allocating the life cycle carbon emissions includes the following steps:

[0030] Determine whether there is a physical relationship. If so, allocate life cycle carbon emissions according to the physical relationship parameters. If not, allocate according to economic value.

[0031] As a preferred technical solution, the following steps are also included:

[0032] Step S5, generating a carbon footprint report based on the evaluation unit, system boundary and life cycle carbon emissions.

[0033] As a preferred technical solution, in step S1, the process of determining the evaluation unit according to the evaluation target includes the following steps:

[0034] When the evaluation goal is to calculate the carbon emissions of a single AC charging pile product during its life cycle, the product unit is used as the evaluation unit; when the evaluation goal is to compare the carbon emission levels of AC charging pile products of multiple brands, the functional unit is used as the evaluation unit.

[0035] Another aspect of the present invention provides an AC charging pile carbon footprint accounting system, comprising:

[0036] The carbon footprint assessment scope determination module is used to determine the assessment unit according to the assessment target, divide the life cycle stages of the AC charging pile product, and determine the system boundary of the AC charging pile;

[0037] Data acquisition module, used to obtain the original data and greenhouse gas emission factors of each life cycle stage of AC charging pile products;

[0038] Carbon emission calculation module, used to calculate the carbon emission of AC charging pile products during their life cycle;

[0039] The carbon emission allocation module is used to allocate the life cycle carbon emissions of the AC charging pile product during its life cycle if at least one process input or output includes multiple products when determining the system boundary or collecting data.

[0040] As a preferred technical solution, it also includes:

[0041] The carbon footprint report generation module is used to generate a carbon footprint report based on the evaluation unit, system boundary and life cycle carbon emissions.

[0042] Compared with the prior art, the present invention has at least the following beneficial effects:

[0043] The present invention establishes a clear and scientific AC charging pile carbon footprint accounting method to obtain accurate AC charging pile life cycle carbon footprint data, which can comprehensively understand the carbon emissions of AC charging pile products in each link of the production, transportation, consumption and other processes, and objectively evaluate the impact of each AC charging pile product on the environment. It is helpful to support relevant units in formulating targeted emission reduction measures, promote the green and low-carbon transformation of the new energy vehicle industry, and promote upstream and downstream industries to calculate carbon footprints and reduce carbon emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 Flow chart of the method for calculating the carbon footprint of an AC charging pile in an embodiment;

[0045] Figure 2 It is a product life cycle flow chart of AC charging pile in the embodiment;

[0046] Figure 3 Schematic diagram of the carbon footprint calculation system for AC charging piles in the embodiment. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0048] Example 1

[0049] In response to the problems existing in the aforementioned prior art, this embodiment provides a carbon footprint accounting method for an AC charging pile, which is used to clearly and scientifically quantify the total amount of greenhouse gas emissions generated by an AC charging pile during its life cycle, and provides general principles and methods for scope determination, data collection, emission calculation, allocation principles, report content, and report publication of the carbon footprint evaluation of an AC charging pile.

[0050] For details, see Figure 1 The method comprises the following steps:

[0051] Step S1, determine the scope of the AC charging pile product carbon footprint assessment. Describe the AC charging pile product system being assessed and the relevant analysis specifications. The assessment scope determination includes the provisions of the assessment unit, product system boundaries and selection criteria.

[0052] The scope must be consistent with the set research objectives and product carbon footprint specification requirements. The scope of the evaluation includes the definition of the evaluation unit, product system boundaries and trade-off criteria.

[0053] (1)Evaluation objectives.

[0054] Before determining the scope of carbon footprint assessment, the goal of implementing the carbon footprint assessment of AC charging piles should be clearly defined. The assessment goal can be one of the following, but not limited to:

[0055] Enterprises understand the carbon emissions performance of their products for decision-making;

[0056] Provide carbon footprint results to clients or customers when necessary;

[0057] Include carbon footprint results in product claims, such as on the product or on a website that is made available to the public.

[0058] A product family with similar functions or technologies, where their carbon emission impacts are reasonably expected to be similar, can be considered a product category.

[0059] (2)Evaluation unit:

[0060] The evaluation unit is determined according to different carbon footprint evaluation objectives. The evaluation unit can be a product unit or a functional unit.

[0061] When the purpose of the evaluation is to understand the carbon emissions of a product over its life cycle, it is appropriate to use a product unit (such as an AC charging station).

[0062] When the evaluation is intended to compare the carbon emission levels of products from different brands, it is appropriate to use functional units (such as converting the carbon emissions of a single AC charging pile into the carbon emissions of a single charge of the AC charging pile (60kWh)).

[0063] (3) Functional unit.

[0064] The functional unit of an AC charging pile is one. For example, an AC charging pile with a power of 7kW and an input voltage of 220V.

[0065] (4) System Boundary

[0066] The product system boundary determines which processes in the entire life cycle of the evaluated product should be included in the GHG (greenhouse gas) evaluation scope. Usually, the AC charging pile product system boundary should include the following five stages: raw material acquisition stage, manufacturing stage, sales stage, use stage, and disposal stage.

[0067] AC charging pile product cycle flow chart see Figure 2 As shown, the raw material acquisition stage includes the acquisition of metal materials, non-metallic materials and other raw materials, and the manufacturing stage includes the assembly and processing of chargers, charging racks, charging connection devices, cable assemblies, casings, packaging and other components.

[0068] (5) Selection criteria

[0069] All processes and material flows that fall within the boundaries of the product system being evaluated should be included in data collection and carbon emissions calculations. However, for some processes and material flows, it is difficult to collect data from suppliers, and it is difficult to find relevant secondary data, and its impact on carbon emissions is small. In this case, it is necessary to use a cut-off criterion. This embodiment excludes processes or material flows that meet the following two conditions from the evaluation scope: both the original data and secondary data of the process are difficult to obtain; after estimation, the impact of the process or material flow on GHG emissions is not significant.

[0070] Step S2, collect the primary data and secondary data in the life cycle of the AC charging pile product. In the data collection, collect the activity data and corresponding emission factors of each emission source or material flow of each process belonging to each life cycle stage. If the GHG emissions of a process can be obtained by measurement, directly collect the GHG measurement value.

[0071] If the product is produced continuously, the data collection on GHG emissions should continue for at least one year. If the product production and sales cycle is short and cannot last for more than one year, the data collection on GHG emissions should continue for at least one quarter.

[0072] The data provided, whether original data or secondary data, must provide sources and supporting information. The original data should ensure reproducibility, such as: production reports, invoices, original record forms, data release document texts, etc.

[0073] (1) Raw data

[0074] For all processes owned or controlled by the AC charging pile manufacturer, collect raw data. For processes other than those owned or controlled by the AC charging pile manufacturer, collect raw data when they contribute significantly to carbon emissions.

[0075] The original data should include all relevant inputs and outputs of the process. For example, inputs can be energy, water, materials, etc.; outputs can be products, by-products, emissions, etc. Emissions can be divided into three categories: emissions to the atmosphere, emissions to water bodies, and emissions to soil.

[0076] If a product is produced at multiple sites, the average data obtained from the same type of raw data at each production site shall be used as the raw data.

[0077] The raw data can be obtained by direct measurements on site or by calculation by multiplying indirect measurements by emission factors. These data are processed so that they are associated with the assessment unit.

[0078] (2) Secondary data

[0079] Secondary data is used when the original data of the processes outside the ownership or control of the AC charging pile manufacturer is difficult to obtain. The source of the secondary data should be recorded and documented.

[0080] (3) Data collection at each stage

[0081] a) Raw materials acquisition stage

[0082] Original data: process data such as energy extraction, raw material production, intermediate material and auxiliary material production, parts processing (if any), and packaging material production; data such as the type of vehicle, fuel type, consumption, load capacity, and load ratio used in the transportation processes such as raw material transportation, packaging material transportation, and auxiliary material transportation.

[0083] Secondary data: Life cycle greenhouse gas emission factors of each raw material and intermediate material.

[0084] b) Manufacturing stage

[0085] Original data: consumption of raw materials and parts; consumption of fuel, electricity, heat and other energy during the manufacturing stage; consumption of production water; production of pollutant emissions; waste treatment data during the manufacturing stage; storage and transportation emission data during the manufacturing stage.

[0086] Secondary data: Life cycle greenhouse gas emission factors related to the consumption of fuel, electricity, heat and other energy, pollutant emissions and waste treatment.

[0087] c) Sales stage

[0088] Original data: type of transport, transport distance, type and amount of fuel consumed, load capacity and load ratio; energy consumed for environmental control such as lighting during storage and sales of products.

[0089] Secondary data: Life cycle GHG emission factors for relevant processes.

[0090] d) Use phase

[0091] Raw data: standard usage scenario data (including power-on state and passive standby state); charging rate, energy efficiency, power and other power consumption data.

[0092] Secondary data: Life cycle GHG emission factors for relevant processes.

[0093] e) Abandonment stage

[0094] Raw data: waste weight, treatment methods and product recovery rate; transportation data such as transportation method, transportation distance, transportation weight, and GHG emissions per unit mileage during the product disposal stage; energy consumed in processes such as product disposal, reprocessing, and component remanufacturing.

[0095] Secondary data: Life cycle GHG emission factors for relevant processes.

[0096] Step S3, calculate the carbon emissions of AC charging pile products according to the corresponding formula. Clarify the calculation method of carbon emissions of AC charging pile products during their life cycle.

[0097] The carbon emissions of AC charging pile products during their life cycle are calculated using formula (1) and formula (2):

[0098]

[0099] Where:

[0100] E t ——Total greenhouse gas emissions during the product life cycle, in kilograms of carbon dioxide equivalent (kgCO2e);

[0101] E i——Total greenhouse gas emissions at each stage of the product life cycle, in kilograms of carbon dioxide equivalent (kgCO2e);

[0102] i——Stages in the product life cycle.

[0103] in,

[0104]

[0105] Where:

[0106] AD – activity data of a process;

[0107] EF——emission factor corresponding to a certain process;

[0108] GWP – Global Warming Potential;

[0109] j – Data on different types of activities at different stages of the product life cycle.

[0110] Step S4, allocate the total carbon emissions within the product life cycle according to the allocation principle. When determining the system boundary or collecting data, if at least one process has input or output that includes multiple products, the total emissions should be allocated within the product life cycle.

[0111] The possible distribution of the AC charging pile carbon footprint assessment process is: a common process, the input is general raw materials or parts, electric energy, and the output is a number of different products including research and evaluation products and waste. The data should be allocated according to the following principles:

[0112] a) Avoid data allocation;

[0113] b) Physical relationship parameters (such as production volume, production hours, etc.) are used for allocation first;

[0114] c) When no physical relationship can be found, the distribution is based on economic value;

[0115] d) If other allocation methods are used, provide the basis and calculation description of the parameters used.

[0116] Step S5, forming and publishing the carbon footprint report of the AC charging pile product.

[0117] The carbon footprint evaluation report of AC charging pile products should at least include the following contents: description of the manufacturing enterprise / organization, product description, evaluation unit and functional unit, reference materials, determination and description of life cycle stages, product life cycle flow chart, rationality of excluded processes, description of standard usage scenarios during the use phase, original data, secondary data and data sources, selection criteria, allocation principles, carbon dioxide equivalent emission inventory of all processes within the system boundary and product life cycle carbon footprint calculation results.

[0118] The release of product carbon footprint reports should comply with relevant national or local regulations. If there are no special regulations, one or more of the following release methods shall be adopted:

[0119] a) Disclose carbon footprint information to consumers through carbon labeling;

[0120] b) Disclose carbon footprint information in the product instructions and explain the meaning of the numerical values;

[0121] c) Publish product carbon footprint information in company brochures or websites.

[0122] In summary, this method establishes a clear and scientific AC charging pile carbon footprint evaluation method to quantify the carbon emissions generated by AC charging pile products during their life cycle. It can objectively evaluate the impact of each AC charging pile product on the environment, help promote the green and low-carbon transformation of the new energy vehicle industry, and promote upstream and downstream industries to calculate carbon footprints and reduce carbon emissions.

[0123] Example 2

[0124] Based on Example 1, see Figure 3 This embodiment provides an AC charging pile carbon footprint accounting system, including:

[0125] The carbon footprint assessment scope determination module is used to determine the assessment unit according to the assessment target, divide the life cycle stages of the AC charging pile product, and determine the system boundary of the AC charging pile;

[0126] Data acquisition module, used to obtain the original data and greenhouse gas emission factors of each life cycle stage of AC charging pile products;

[0127] Carbon emission calculation module, used to calculate the carbon emission of AC charging pile products during their life cycle;

[0128] A carbon emissions allocation module is used to allocate the lifecycle carbon emissions within the lifecycle of the AC charging pile product when determining the system boundary or collecting data, if at least one process input or output contains multiple products;

[0129] The carbon footprint report generation module is used to generate a carbon footprint report based on the evaluation unit, system boundary and life cycle carbon emissions.

[0130] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A method for calculating the carbon footprint of an AC charging pile, characterized in that: The steps include: Step S1, determining the evaluation unit according to the evaluation target, dividing the life cycle stages of the AC charging pile product, and determining the system boundary of the AC charging pile; Step S2, obtaining the original data and greenhouse gas emission factors of each life cycle stage of the AC charging pile product; Step S3, calculating the life cycle carbon emissions of the AC charging pile product; Step S4, when determining the system boundary or collecting data, if the input or output of at least one process includes multiple products, the life cycle carbon emissions are allocated within the life cycle of the AC charging pile product.

2. The method for calculating the carbon footprint of an AC charging pile according to claim 1, characterized in that: The step S1 further comprises: Discard processes for which primary and secondary data are difficult to obtain, and / or processes or material flows that have a small impact on carbon emissions.

3. The method for calculating the carbon footprint of an AC charging pile according to claim 1, characterized in that: In step S2, the life cycle stages of the AC charging pile product include raw material acquisition stage, manufacturing stage, sales stage, use stage and disposal stage.

4. The method for calculating the carbon footprint of an AC charging pile according to claim 3, characterized in that: In the raw material acquisition stage, the original data includes energy mining, raw material production, intermediate materials, auxiliary material production, parts processing, packaging material production process data, raw material transportation, packaging material transportation, auxiliary material transportation process used in the vehicle type, fuel type, consumption, load and load ratio data; In the manufacturing stage, the raw data include the consumption of raw materials and parts, the consumption of fuel, electricity, heat and other energy in the manufacturing process, the consumption of production water, the production of pollutant emissions, the waste treatment data in the manufacturing stage, and the storage and transportation emission data in the manufacturing stage; In the sales stage, the raw data includes the type of transportation vehicle, transportation distance, type and amount of fuel consumed, load capacity and load ratio, and the amount of energy consumed by lighting environment control during storage and sales of the product; In the use phase, the raw data includes use standard scenario data, charging rate, energy efficiency and power consumption data; In the waste stage, the raw data include waste weight, treatment method, product recovery rate, transportation method, transportation distance, transportation weight, greenhouse gas emissions per unit mileage, and energy consumed in the product waste, reprocessing, and parts remanufacturing processes.

5. The method for calculating the carbon footprint of an AC charging pile according to claim 1, characterized in that: In step S3, the life cycle carbon emissions are calculated using the following formula: in, E t ——Total greenhouse gas emissions during the product life cycle, in kilograms of carbon dioxide equivalent; E i ——Total greenhouse gas emissions at each stage of the product life cycle, in kilograms of carbon dioxide equivalent; i——Stages in the product life cycle; AD – Activity data of a process; EF——emission factor corresponding to a certain process; GWP – Global Warming Potential; j – Data on different types of activities at different stages of the product life cycle.

6. The method for calculating the carbon footprint of an AC charging pile according to claim 1, characterized in that: In step S4, the process of allocating the life cycle carbon emissions includes the following steps: Determine whether there is a physical relationship. If so, allocate life cycle carbon emissions according to the physical relationship parameters. If not, allocate according to economic value.

7. The method for calculating the carbon footprint of an AC charging pile according to claim 1, characterized in that: The following steps are also included: Step S5, generating a carbon footprint report based on the evaluation unit, system boundary and life cycle carbon emissions.

8. The method for calculating the carbon footprint of an AC charging pile according to claim 1, characterized in that: In step S1, the process of determining the evaluation unit according to the evaluation target includes the following steps: When the evaluation goal is to calculate the carbon emissions of a single AC charging pile product during its life cycle, the product unit is used as the evaluation unit; when the evaluation goal is to compare the carbon emission levels of AC charging pile products of multiple brands, the functional unit is used as the evaluation unit.

9. An AC charging pile carbon footprint accounting system, characterized in that: include: The carbon footprint assessment scope determination module is used to determine the assessment unit according to the assessment target, divide the life cycle stages of the AC charging pile product, and determine the system boundary of the AC charging pile; Data acquisition module, used to obtain the original data and greenhouse gas emission factors of each life cycle stage of AC charging pile products; Carbon emission calculation module, used to calculate the carbon emission of AC charging pile products during their life cycle; The carbon emission allocation module is used to allocate the life cycle carbon emissions of the AC charging pile product during its life cycle if at least one process input or output includes multiple products when determining the system boundary or collecting data.

10. The AC charging pile carbon footprint calculation system according to claim 9, characterized in that: Also includes: The carbon footprint report generation module is used to generate a carbon footprint report based on the evaluation unit, system boundary and life cycle carbon emissions.

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