A method and device for defining carbon emission accounting boundaries for power battery recycling

Abstract

The present invention provides a method and device for defining the boundary of carbon emission accounting for power battery recycling, the definition method comprising: setting the overall process flow range for the recycling of retired power batteries; generating corresponding boundaries according to the overall process flow range and in combination with the evaluation requirements corresponding to carbon emission accounting; and outputting the unit process and inventory structure corresponding to the recycling of retired power batteries according to the boundaries. By defining the boundary of carbon emission accounting, the present invention determines a clear and standardized system boundary compared to the prior art, improves the accuracy of carbon emission accounting and the evaluation of the entire life cycle of retired power batteries, and is more in line with actual application conditions.

Description

Technical Field

[0001] The present invention relates to the field of power battery recycling, and in particular to a method and device for defining a carbon emission accounting boundary for power battery recycling. Background Art

[0002] With the development of science and technology, the application of power batteries has become more and more extensive. However, power batteries contain a variety of metal elements. If they are not handled properly, they may cause safety hazards and environmental pollution, and they are difficult to recycle. At present, the life cycle assessment (LCA) of power batteries generally includes the recycling of power batteries in the entire life cycle. However, when the existing technology conducts life cycle assessments on retired power batteries or calculates carbon emissions, there is often a problem of unclear system boundaries. The output results obtained for the same evaluation requirements may vary greatly, which has also led to large errors in the conclusions drawn by some studies, and these theories cannot be in line with the actual situation in the process of carbon emission accounting. Summary of the invention

[0003] The present invention provides a method and device for defining the boundary of carbon emission accounting for power battery recycling, so as to solve the technical problem of unclear system boundaries and improve the accuracy of life cycle assessment and carbon emission accounting of retired power batteries.

[0004] In order to solve the above technical problems, an embodiment of the present invention provides a method for defining the carbon emission accounting boundary of power battery recycling, including:

[0005] Set the overall process flow range for the recycling of retired power batteries;

[0006] Generate corresponding boundaries based on the overall process flow range and in combination with the evaluation requirements corresponding to carbon emission accounting;

[0007] According to the boundary, a unit process and a list structure corresponding to the recycling of the retired power battery are output.

[0008] Furthermore, the overall process flow range is the range formed by one or more combinations of the following processes: pre-plant processing process, transportation process, waste treatment process, in-plant physical treatment process, in-plant chemical treatment process, product shaping process and distribution and use process.

[0009] Furthermore, the corresponding boundaries are generated according to the overall process flow range and in combination with the evaluation requirements corresponding to the carbon emission accounting, specifically:

[0010] When the evaluation requirement corresponding to the carbon emission accounting is that only waste treatment is required, a first boundary corresponding to the evaluation requirement is generated by combining the pre-plant treatment process, the transportation process and the waste treatment process in the overall process flow range;

[0011] When the evaluation demand corresponding to the carbon emission accounting is to obtain copper and aluminum metals, obtain plastic shells, or prepare raw materials for chemical extraction, the second boundary corresponding to the evaluation demand is generated by combining the pre-plant processing flow, transportation flow, waste treatment flow, and in-plant physical treatment flow in the overall process flow range;

[0012] When the evaluation demand corresponding to the carbon emission accounting is to recycle metal elements, provide raw materials for preparing precursors, or provide raw materials for preparing positive electrode materials, a third boundary corresponding to the evaluation demand is generated by combining the pre-plant processing flow, transportation flow, waste treatment flow, in-plant physical treatment flow, and in-plant chemical treatment flow in the overall process flow range;

[0013] When the evaluation requirement corresponding to the carbon emission accounting is the manufacturing of recycled batteries, the fourth boundary corresponding to the evaluation requirement is generated by combining the pre-factory processing flow, transportation flow, waste treatment flow, in-factory physical treatment flow, in-factory chemical treatment flow and product shaping flow in the overall process flow range;

[0014] When the evaluation demand corresponding to carbon emission accounting is to manufacture recycled batteries and put them on the market, the fifth boundary corresponding to the evaluation demand is generated by combining the pre-factory processing process, transportation process, waste treatment process, in-factory physical treatment process, in-factory chemical treatment process, product shaping process and distribution and use process in the overall process flow range.

[0015] Furthermore, according to the boundary, the unit flow and inventory structure corresponding to the recycling of the retired power battery are output. Specifically:

[0016] When the boundary is a first boundary, outputting first transportation process information and waste treatment process information;

[0017] When the boundary is a second boundary, outputting second transportation process information, second waste treatment process information, and second in-plant physical treatment process information;

[0018] When the boundary is a third boundary, outputting third transportation process information, third waste treatment process information, third in-plant physical treatment process information and third in-plant chemical treatment process information;

[0019] When the boundary is a fourth boundary, output fourth transportation process information, fourth waste treatment process information, fourth in-plant physical treatment process information, fourth in-plant chemical treatment process information and fourth product shaping process information;

[0020] When the boundary is the fifth boundary, the fifth transportation process information, the fifth waste treatment process information, the fifth in-plant physical treatment process information, the fifth in-plant chemical treatment process information, the fifth product shaping process information and the fifth allocation and use process information are output.

[0021] Furthermore, the transportation process information corresponding to the retired power batteries includes the transportation range within and outside the factory, transportation tools, fuel type and fuel consumption per 100 kilometers; the waste treatment process information corresponding to the retired power batteries includes waste treatment methods, waste recycling methods, standardized waste discharge methods, and parameter information of required equipment and input-output logistics information.

[0022] Furthermore, the in-factory physical processing process information corresponding to the retired power battery includes equipment information of the discharge, heat treatment, crushing, sorting, and mechanical disassembly process, and the material and first energy input-output data of each first functional unit.

[0023] Furthermore, the in-factory chemical treatment process information corresponding to the retired power batteries includes information on equipment required for leaching, chemical purification, extraction purification, crystallization, liquid preparation, reaction, filtration and washing, drying, foreign matter separation, and high-temperature calcination processes, and the material and second energy input-output data of each second functional unit.

[0024] Furthermore, the product shaping process information corresponding to the retired power battery includes product packaging materials, packing materials and granulation procedure information.

[0025] Furthermore, the distribution and use process information corresponding to the retired power battery includes product distribution and use logistics information and information on carbon emissions caused by the loading weight of the power battery.

[0026] Accordingly, an embodiment of the present invention further provides a device for defining the boundary of carbon emission accounting for power battery recycling, comprising a range setting unit, a boundary determination unit and an information output unit; wherein,

[0027] The range setting unit sets the overall process flow range for the recycling of retired power batteries; the overall process flow range is a range formed by one or more combinations of the following processes: pre-factory processing process, transportation process, waste treatment process, in-factory physical treatment process, in-factory chemical treatment process, product shaping process and distribution and use process

[0028] The boundary determination unit is used to generate a corresponding boundary according to the overall process flow range and in combination with the evaluation requirements corresponding to the carbon emission accounting;

[0029] The information output unit is used to output a unit process and a list structure corresponding to the recycling of the retired power battery according to the boundary.

[0030] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0031] The present invention provides a method and device for defining the boundary of carbon emission accounting for power battery recycling, the definition method comprising: setting the overall process flow range for the recycling of retired power batteries; generating corresponding boundaries according to the overall process flow range and in combination with the evaluation requirements corresponding to carbon emission accounting; and outputting the unit process and inventory structure corresponding to the recycling of retired power batteries according to the boundaries. By defining the boundary of carbon emission accounting, the present invention determines a clear and standardized system boundary compared to the prior art, improves the accuracy of carbon emission accounting and the evaluation of the entire life cycle of retired power batteries, and is more in line with actual application conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 : A flow chart of an embodiment of a method for defining carbon emission accounting boundaries for power battery recycling provided by the present invention.

[0033] Figure 2 : A structural schematic diagram of an embodiment of a device for defining carbon emission accounting boundaries for power battery recycling provided by the present invention. DETAILED DESCRIPTION

[0034] 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 only 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 are within the scope of protection of the present invention.

[0035] Embodiment 1:

[0036] Please refer to Figure 1 , Figure 1 A method for defining a carbon emission accounting boundary for power battery recycling provided in an embodiment of the present invention includes steps S1 to S3; wherein:

[0037] Step S1, setting the overall process flow range for recycling of retired power batteries;

[0038] In this embodiment, the overall process flow range is the range formed by one or more combinations of the following processes: pre-plant processing process, transportation process, waste treatment process, in-plant physical treatment process, in-plant chemical treatment process, product shaping process and distribution and use process.

[0039] In this embodiment, the pre-processing process includes the following steps:

[0040] Confirm the type of retired power battery products to be picked up and the type of vehicles to be assembled, and register, archive and back up accordingly;

[0041] Check whether there is leakage or insulation failure. If yes, perform insulation treatment or discharge safely until the voltage is less than 1.5V;

[0042] Check whether the electrolyte is leaking, cut off the source of leakage, collect the electrolyte and use a special anti-leakage packaging box or take effective anti-leakage measures to eliminate the risk;

[0043] Check whether there are signs of fire or smoke. If there are signs of fire or smoke, isolate the items and wait until the danger is eliminated before packaging for transportation or unpacking for inspection to eliminate the risk.

[0044] Check whether there are signs of water immersion, determine the safety risk level of water immersion, and air dry or eliminate the risk;

[0045] Check battery parameters such as battery temperature and voltage to determine whether they exceed the safety limit conditions specified by the manufacturer. If so, isolate and place the batteries until the danger is eliminated before packaging and transporting them.

[0046] In this embodiment, the transportation process includes the following steps:

[0047] Determine the transportation time, location, docking information, handover method and transportation plan;

[0048] Use a transportation company that is qualified and experienced in transporting dangerous goods;

[0049] Install fire and smoke detectors (install wireless connectors in the cab to monitor the cabin conditions), and enable GPS to remotely monitor vehicle conditions;

[0050] Develop emergency response plans, strictly control vehicle loads, and maintain contact with vehicle transport personnel at certain preset intervals.

[0051] In this embodiment, the in-plant physical processing process includes the following steps:

[0052] After delivery, the retired power batteries are stored, disassembled and reused according to specific needs or business requirements, where reuse includes cascade utilization and recycling;

[0053] After discharge, the shell is cut, and then wet crushed and sorted to obtain iron, copper, aluminum, carbon powder and positive and negative electrode mixture;

[0054] Iron, copper, aluminum and carbon powder are recycled, and the positive and negative electrode mixture is pyrolyzed;

[0055] According to the different degrees of pyrolysis, crushing, screening, magnetic separation, dehydration or secondary combustion, preliminary dust removal, cooling, deacidification, bag dust removal and re-deacidification are carried out respectively to finally obtain pyrolysis slag.

[0056] In this embodiment, the in-plant chemical treatment process mainly recovers valuable metal elements such as cobalt, nickel, lithium and manganese through wet or pyrometallurgical methods.

[0057] In this embodiment, the product shaping process includes: sequentially carrying out the steps of positive and negative electrode ingredient preparation, positive and negative electrode coating, positive and negative electrode film making, adding diaphragm and baking, winding, short circuit inspection, shelling, grooving, liquid injection, sealing and sealing inspection, formation, capacity division, outer packaging, etc., to form the final battery product.

[0058] The distribution and use process includes delivering the battery products to consumers or downstream customers through different logistics means and sales channels.

[0059] In this embodiment, the waste treatment process includes the following steps:

[0060] Solid, liquid and gaseous wastes generated in each process shall be disposed of in accordance with relevant waste treatment requirements and standard specifications.

[0061] Step S2, generating corresponding boundaries according to the overall process flow range and in combination with evaluation requirements corresponding to carbon emission accounting;

[0062] In this embodiment, the corresponding boundaries are generated according to the overall process flow range and in combination with the evaluation requirements corresponding to the carbon emission accounting, specifically:

[0063] When the evaluation requirement corresponding to the carbon emission accounting is that only waste treatment is required, a first boundary corresponding to the evaluation requirement is generated by combining the pre-plant treatment process, the transportation process and the waste treatment process in the overall process flow range;

[0064] When the evaluation demand corresponding to the carbon emission accounting is to obtain copper and aluminum metals, obtain plastic shells, or prepare raw materials for chemical extraction, the second boundary corresponding to the evaluation demand is generated by combining the pre-plant processing flow, transportation flow, waste treatment flow, and in-plant physical treatment flow in the overall process flow range;

[0065] When the evaluation demand corresponding to the carbon emission accounting is to recycle metal elements, provide raw materials for preparing precursors, or provide raw materials for preparing positive electrode materials, a third boundary corresponding to the evaluation demand is generated by combining the pre-plant processing flow, transportation flow, waste treatment flow, in-plant physical treatment flow, and in-plant chemical treatment flow in the overall process flow range;

[0066] When the evaluation requirement corresponding to the carbon emission accounting is the manufacturing of recycled batteries, the fourth boundary corresponding to the evaluation requirement is generated by combining the pre-factory processing flow, transportation flow, waste treatment flow, in-factory physical treatment flow, in-factory chemical treatment flow and product shaping flow in the overall process flow range;

[0067] When the evaluation demand corresponding to carbon emission accounting is to manufacture recycled batteries and put them on the market, the fifth boundary corresponding to the evaluation demand is generated by combining the pre-factory processing process, transportation process, waste treatment process, in-factory physical treatment process, in-factory chemical treatment process, product shaping process and distribution and use process in the overall process flow range.

[0068] Step S3: outputting a unit process and a list structure corresponding to the recycling of the retired power battery according to the boundary.

[0069] In this embodiment, when the boundary is the first boundary, the first transportation process information and the waste treatment process information are output; wherein,

[0070] The transportation process information corresponding to the retired power batteries includes the transportation range within and outside the factory, transportation tools, fuel type and fuel consumption per 100 kilometers; the waste treatment process information corresponding to the retired power batteries includes the waste treatment method, waste recycling method, standardized waste discharge method, parameter information of the required equipment and input-output logistics information.

[0071] When the boundary is the second boundary, the second transportation process information, the second waste treatment process information and the second in-plant physical treatment process information are output; wherein,

[0072] The in-factory physical processing process information corresponding to the retired power battery includes equipment information of the discharge, heat treatment, crushing, sorting, and mechanical disassembly process, and the materials and first energy input-output data of each first functional unit.

[0073] When the boundary is the third boundary, the third transportation process information, the third waste treatment process information, the third in-plant physical treatment process information and the third in-plant chemical treatment process information are output; wherein,

[0074] The in-factory chemical treatment process information corresponding to the retired power batteries includes information on equipment required for leaching, chemical purification, extraction purification, crystallization, liquid preparation, reaction, filtration and washing, drying, foreign matter separation, and high-temperature calcination processes, and material and second energy input-output data for each second functional unit.

[0075] When the boundary is the fourth boundary, output the fourth transportation process information, the fourth waste treatment process information, the fourth in-plant physical treatment process information, the fourth in-plant chemical treatment process information and the fourth product shaping process information; wherein,

[0076] The product shaping process information corresponding to the retired power battery includes product packaging materials, packing materials and granulation procedure information.

[0077] When the boundary is the fifth boundary, the fifth transportation process information, the fifth waste treatment process information, the fifth in-plant physical treatment process information, the fifth in-plant chemical treatment process information, the fifth product shaping process information and the fifth allocation and use process information are output.

[0078] The distribution and use process information corresponding to the retired power batteries includes the distribution and use logistics information of the products (this information is mainly determined based on the logistics model of new energy vehicles, for example, the calculation method for transportation distribution in the national standard "Building Carbon Emission Calculation Standard" (No. GB / T51366-2019) issued by the Ministry of Housing and Urban-Rural Development is used to determine the average transportation distance and average transportation weight of the products produced, that is, to determine the average ton*km value of the product. In addition, the type of transportation vehicle must be determined, including 2-ton and 5-ton light vehicles, 10-ton heavy vehicles, 15-ton heavy vehicles, etc.) and information on carbon emissions caused by the loading weight of the power batteries.

[0079] Accordingly, refer to Figure 2 , Figure 2 The present invention also provides a schematic diagram of a structure of a device for defining the boundary of carbon emission accounting for power battery recycling, including a range setting unit 101, a boundary determination unit 102 and an information output unit 103; wherein,

[0080] The range setting unit 101 sets the overall process flow range of the recycling of retired power batteries; the overall process flow range is a range formed by one or more combinations of the following processes: pre-factory processing process, transportation process, waste treatment process, in-factory physical treatment process, in-factory chemical treatment process, product shaping process and distribution and use process;

[0081] The boundary determination unit 102 is used to generate a corresponding boundary according to the overall process flow range and in combination with the evaluation requirements corresponding to the carbon emission accounting;

[0082] The information output unit 103 is used to output a unit process and a list structure corresponding to the recycling of the retired power battery according to the boundary.

[0083] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0084] The present invention provides a method and device for defining the boundary of carbon emission accounting for power battery recycling, the definition method comprising: setting the overall process flow range for the recycling of retired power batteries; generating corresponding boundaries according to the overall process flow range and in combination with the evaluation requirements corresponding to carbon emission accounting; and outputting the unit process and inventory structure corresponding to the recycling of retired power batteries according to the boundaries. By defining the boundary of carbon emission accounting, the present invention determines a clear and standardized system boundary compared to the prior art, improves the accuracy of carbon emission accounting and the evaluation of the entire life cycle of retired power batteries, and is more in line with actual application conditions.

[0085] Embodiment 2:

[0086] According to a method for defining a carbon emission accounting boundary for power battery recycling of the present invention, an embodiment (embodiment 2) is also provided, which includes the following steps:

[0087] Step S1, setting the overall process flow range for recycling of retired power batteries;

[0088] In this embodiment, the overall process flow range includes seven processes in the entire life cycle of retired power battery recycling technology, namely, pre-factory processing process, transportation process, waste treatment process, in-factory physical treatment process, in-factory chemical treatment process, product shaping process and distribution and use process.

[0089] Step S2, generating corresponding boundaries according to the overall process flow range and in combination with evaluation requirements corresponding to carbon emission accounting;

[0090] In this embodiment, since it is aimed at the evaluation needs of lithium iron phosphate cathode material products, the fourth boundary is selected, which includes the pre-factory processing process, transportation process, waste treatment process, in-factory physical treatment process, in-factory chemical treatment process and product shaping process. The purpose of this boundary is to use recycled metal raw materials to prepare lithium iron phosphate cathode material products.

[0091] Step S3: outputting a unit process and a list structure corresponding to the recycling of the retired power battery according to the boundary.

[0092] In this embodiment, the transportation process within the boundary range only includes the transportation range outside the factory. It is assumed that the average transportation distance of retired batteries is 500km, and the Xichai 4110 diesel vehicle is used for transportation. The average fuel consumption of this vehicle type is 12-14 liters per 100 kilometers; the waste treatment process includes the treatment of waste liquid, waste gas and solid waste. The mixing, calcination and other processes will produce carbon-containing organic matter including Li elements, CO2, CO, ammonia, sulfide, ammonium hydrogen phosphate and sucrose, which are mainly discharged in the form of gas. They are discharged after harmless treatment according to environmental protection requirements, and the wastewater is purchased in the form of third-party services.

[0093] At the same time, it is also necessary to consider the in-plant physical treatment process of waste batteries, such as equipment information for discharge, heat treatment, crushing, sorting, mechanical disassembly and other process flows, material and energy input-output data for each functional unit, etc. And the in-plant chemical treatment process includes leaching, chemical purification, extraction purification, crystallization, liquid preparation, reaction, filtration and washing, drying, foreign matter separation, high-temperature calcination and other procedures, equipment information, material and energy input-output data for each functional unit, etc.;

[0094] According to statistics, the materials required for recycling each kWh of used ternary lithium batteries include:

[0095]

[0096] According to statistics, the energy required to recycle each kWh of used ternary lithium batteries is 0.0186 kWh of electricity and 12 kg of steam.

[0097] According to statistics, the emission list generated by recycling and utilizing waste ternary lithium batteries per kWh is shown in the following table:

[0098]

[0099] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0100] An embodiment of the present invention provides a method for defining the boundary of carbon emission accounting for power battery recycling, the definition method comprising: setting the overall process flow range for the recycling of retired power batteries; generating corresponding boundaries according to the overall process flow range and in combination with the evaluation requirements corresponding to carbon emission accounting; and outputting the unit process and inventory structure corresponding to the recycling of retired power batteries according to the boundaries. By defining the boundary of carbon emission accounting, the present invention determines a clear and standardized system boundary compared to the prior art, thereby improving the accuracy of carbon emission accounting and the evaluation of the entire life cycle of retired power batteries, and being more in line with actual application conditions.

[0101] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for defining the carbon emission accounting boundary of power battery recycling, characterized in that: include: Set the overall process flow range for the recycling of retired power batteries; Generate corresponding boundaries based on the overall process flow range and in combination with the evaluation requirements corresponding to carbon emission accounting; Outputting, according to the boundary, a unit process and a list structure corresponding to the recycling of the retired power battery; The overall process flow range is a range formed by one or more combinations of the following processes: pre-plant processing process, transportation process, waste treatment process, in-plant physical processing process, in-plant chemical processing process, product shaping process and distribution and use process; According to the overall process flow range, combined with the evaluation requirements corresponding to the carbon emission accounting, the corresponding boundaries are generated, specifically: When the evaluation requirement corresponding to the carbon emission accounting is that only waste treatment is required, a first boundary corresponding to the evaluation requirement is generated by combining the pre-plant treatment process, the transportation process and the waste treatment process in the overall process flow range; When the evaluation demand corresponding to the carbon emission accounting is to obtain copper and aluminum metals, obtain plastic shells, or prepare raw materials for chemical extraction, the second boundary corresponding to the evaluation demand is generated by combining the pre-plant processing flow, transportation flow, waste treatment flow, and in-plant physical treatment flow in the overall process flow range; When the evaluation demand corresponding to the carbon emission accounting is to recycle metal elements, provide raw materials for preparing precursors, or provide raw materials for preparing positive electrode materials, a third boundary corresponding to the evaluation demand is generated by combining the pre-plant processing flow, transportation flow, waste treatment flow, in-plant physical treatment flow, and in-plant chemical treatment flow in the overall process flow range; When the evaluation requirement corresponding to the carbon emission accounting is the manufacturing of recycled batteries, the fourth boundary corresponding to the evaluation requirement is generated by combining the pre-factory processing flow, transportation flow, waste treatment flow, in-factory physical treatment flow, in-factory chemical treatment flow and product shaping flow in the overall process flow range; When the evaluation demand corresponding to carbon emission accounting is to manufacture recycled batteries and put them on the market, the fifth boundary corresponding to the evaluation demand is generated by combining the pre-factory processing process, transportation process, waste treatment process, in-factory physical treatment process, in-factory chemical treatment process, product shaping process and distribution and use process in the overall process flow range.

2. A method for defining the carbon emission accounting boundary of power battery recycling as claimed in claim 1, characterized in that: The outputting of the unit flow and inventory structure corresponding to the recycling of the retired power battery according to the boundary is specifically: When the boundary is a first boundary, outputting first transportation process information and first waste treatment process information; When the boundary is a second boundary, outputting second transportation process information, second waste treatment process information, and second in-plant physical treatment process information; When the boundary is a third boundary, outputting third transportation process information, third waste treatment process information, third in-plant physical treatment process information and third in-plant chemical treatment process information; When the boundary is a fourth boundary, output fourth transportation process information, fourth waste treatment process information, fourth in-plant physical treatment process information, fourth in-plant chemical treatment process information and fourth product shaping process information; When the boundary is the fifth boundary, the fifth transportation process information, the fifth waste treatment process information, the fifth in-plant physical treatment process information, the fifth in-plant chemical treatment process information, the fifth product shaping process information and the fifth allocation and use process information are output.

3. A method for defining the carbon emission accounting boundary of power battery recycling as claimed in claim 2, characterized in that: The transportation process information corresponding to the retired power batteries includes the transportation range within and outside the factory, transportation tools, fuel type and fuel consumption per 100 kilometers; the waste treatment process information corresponding to the retired power batteries includes the waste treatment method, waste recycling method, standardized waste discharge method, parameter information of the required equipment and input-output logistics information.

4. A method for defining the carbon emission accounting boundary of power battery recycling as claimed in claim 2, characterized in that: The in-factory physical processing process information corresponding to the retired power battery includes equipment information of the discharge, heat treatment, crushing, sorting, and mechanical disassembly process, and the materials and first energy input-output data of each first functional unit.

5. The method for defining the carbon emission accounting boundary of power battery recycling as claimed in claim 2, characterized in that: The in-factory chemical treatment process information corresponding to the retired power batteries includes information on equipment required for leaching, chemical purification, extraction purification, crystallization, liquid preparation, reaction, filtration and washing, drying, foreign matter separation, and calcination processes, and material and second energy input-output data for each second functional unit.

6. A method for defining the carbon emission accounting boundary of power battery recycling as claimed in claim 2, characterized in that: The product shaping process information corresponding to the retired power battery includes product packaging materials, packing materials and granulation procedure information.

7. A method for defining the carbon emission accounting boundary of power battery recycling as claimed in claim 2, characterized in that: The distribution and use process information corresponding to the retired power battery includes product distribution and use logistics information and information on carbon emissions caused by the loading weight of the power battery.

8. A device for defining the boundary of carbon emission accounting for power battery recycling, characterized in that: It includes a range setting unit, a boundary determination unit and an information output unit; wherein, The range setting unit sets the overall process flow range of the recycling of retired power batteries; the overall process flow range is a range formed by one or more combinations of the following processes: pre-factory processing process, transportation process, waste treatment process, in-factory physical treatment process, in-factory chemical treatment process, product shaping process and distribution and use process; The boundary determination unit is used to generate a corresponding boundary according to the overall process flow range and in combination with the evaluation requirements corresponding to the carbon emission accounting; The information output unit is used to output a unit process and a list structure corresponding to the recycling of the retired power battery according to the boundary; The overall process flow range is a range formed by one or more combinations of the following processes: pre-plant processing process, transportation process, waste treatment process, in-plant physical processing process, in-plant chemical processing process, product shaping process and distribution and use process; The boundary determination unit generates corresponding boundaries according to the overall process flow range and in combination with the evaluation requirements corresponding to the carbon emission accounting, specifically: When the evaluation requirement corresponding to the carbon emission accounting is that only waste treatment is required, the boundary determination unit combines the pre-plant treatment process, the transportation process and the waste treatment process in the overall process flow range to generate a first boundary corresponding to the evaluation requirement; When the evaluation requirement corresponding to the carbon emission accounting is to obtain copper and aluminum metals, obtain plastic shells, or prepare raw materials for chemical extraction, the boundary determination unit combines the pre-plant processing flow, transportation flow, waste treatment flow, and in-plant physical treatment flow in the overall process flow range to generate a second boundary corresponding to the evaluation requirement; When the evaluation demand corresponding to the carbon emission accounting is to recycle metal elements, provide raw materials for preparing precursors, or provide raw materials for preparing positive electrode materials, the boundary determination unit combines the pre-plant processing flow, transportation flow, waste treatment flow, in-plant physical treatment flow, and in-plant chemical treatment flow in the overall process flow range to generate a third boundary corresponding to the evaluation demand; When the evaluation requirement corresponding to the carbon emission accounting is manufacturing recycled batteries, the boundary determination unit combines the pre-plant processing flow, transportation flow, waste treatment flow, in-plant physical treatment flow, in-plant chemical treatment flow and product shaping flow in the overall process flow range to generate a fourth boundary corresponding to the evaluation requirement; When the evaluation requirement corresponding to carbon emission accounting is to manufacture recycled batteries and put them on the market, the boundary determination unit combines the pre-factory processing flow, transportation process, waste treatment process, in-factory physical treatment process, in-factory chemical treatment process, product shaping process and distribution and use process in the overall process flow range to generate a fifth boundary corresponding to the evaluation requirement.

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