Pole piece active layer processing method and device, computer equipment, readable storage medium and program product

Abstract

The invention relates to a pole piece active layer processing method and device, computer equipment, a computer readable storage medium and a computer program product. The method comprises the following steps: for a positive pole piece of a battery cell, in the process of calcining a pole piece active layer of the positive pole piece, obtaining a calcination temperature and a weight loss ratio of the pole piece active layer; based on the temperature range of the calcining temperature and the weight loss ratio range of the weight loss ratio, determining the SOH range of the SOH of the positive pole piece; and processing the active layer of the pole piece based on the SOH range of the SOH. According to the method provided by the invention, the active material in the active layer of the pole piece can be recycled to the maximum extent, so that resource waste is avoided.

Description

Technical Field

[0001] The present application relates to the field of battery recycling technology, and in particular to a method, device, computer equipment, computer-readable storage medium and computer program product for processing an active layer of a pole piece. Background Art

[0002] In order to protect the environment and promote the sustainable use of resources, researchers in the battery field are conducting more and more in-depth research on battery recycling technology. Among them, the treatment of the active layer of the positive electrode is the key content of battery recycling technology.

[0003] In the existing battery recycling technology, no matter what state the battery is in, the same method is used to process the active layer of the electrode. This may cause damage to the active materials of the active layer of the electrode due to improper processing, thereby causing waste of resources. Summary of the invention

[0004] Based on this, it is necessary to provide a method, device, computer equipment, computer-readable storage medium and computer program product for processing the active layer of an electrode that can maximize the recovery of active materials in response to the above-mentioned technical problems.

[0005] In a first aspect, the present application provides a method for processing an active layer of an electrode, the method comprising:

[0006] For the positive electrode of the battery cell, during the calcination of the active layer of the positive electrode, the calcination temperature and the weight loss rate of the active layer of the electrode are obtained;

[0007] Based on the temperature range of the calcination temperature and the weight loss rate range of the weight loss rate, determine the SOH range of the health state SOH of the positive electrode sheet;

[0008] Based on the SOH range in which the SOH lies, the active layer of the electrode is processed.

[0009] In one embodiment, based on the temperature range of the calcination temperature and the weight loss rate range of the weight loss rate, determining the SOH range of the state of health SOH of the positive electrode sheet includes:

[0010] When the calcination temperature is within the first temperature range and the weight loss rate is within the first weight loss rate range, determining that the SOH is within the first SOH range;

[0011] When the calcination temperature is within the second temperature range and the weight loss rate is not within the first weight loss rate range, it is determined that the SOH is within the second SOH range; wherein the lower limit value of the second temperature range is not less than the upper limit value of the first temperature range, and the lower limit value of the second SOH range is not less than the upper limit value of the first SOH range.

[0012] In one embodiment, the second SOH range includes the third SOH range and the fourth SOH range, and the lower limit value of the fourth SOH range is not less than the upper limit value of the third SOH range; when the calcination temperature is within the second temperature range and the weight loss rate is not within the first weight loss rate range, determining that the SOH is within the second SOH range includes:

[0013] When the weight loss rate is within the second weight loss rate range, determining that the SOH is within the third SOH range; wherein the upper limit value of the second weight loss rate range is not greater than the lower limit value of the first weight loss rate range;

[0014] When the weight loss rate is within the third weight loss rate range, it is determined that the SOH is within the fourth SOH range; wherein the upper limit value of the third weight loss rate range is not greater than the lower limit value of the second weight loss rate range.

[0015] In one embodiment, based on the SOH range in which the SOH is located, the active layer of the pole piece is processed, including:

[0016] When the SOH is within the first SOH range or within the third SOH range, the active layer of the electrode is processed based on the wet recovery technology;

[0017] When the SOH is within the fourth SOH range, the pole piece active layer is processed based on high temperature sintering technology.

[0018] In one embodiment, before obtaining the calcination temperature and the weight loss rate of the active layer of the pole piece, the method further includes:

[0019] When the state of charge (SOC) of the battery cell is not greater than the SOC threshold, the electrode sheet active layer is separated from the positive electrode sheet based on a preset separation method.

[0020] In one of the embodiments, the preset separation method is a pole piece powdering method, an acidic stripping method or an alkaline stripping method.

[0021] In a second aspect, the present application also provides a device for processing an active layer of a pole piece, the device comprising:

[0022] An acquisition module is used to acquire a calcination temperature and a weight loss rate of the active layer of the positive electrode of the battery cell during the calcination of the active layer of the positive electrode;

[0023] A determination module, for determining a SOH range of a state of health SOH of a positive electrode sheet based on a temperature range of a calcination temperature and a weight loss rate range of a weight loss rate;

[0024] The processing module is used to process the active layer of the electrode based on the SOH range in which the SOH is located.

[0025] In a third aspect, the present application further provides a computer device, which includes a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the method in any one of the above embodiments when executing the computer program.

[0026] In a fourth aspect, the present application further provides a computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method in any one of the above embodiments are implemented.

[0027] In a fifth aspect, the present application further provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the method in any one of the above embodiments are implemented.

[0028] The above-mentioned pole piece active layer processing method, device, computer equipment, computer readable storage medium and computer program product, for the positive pole piece of the battery cell, obtain the calcination temperature and the weight loss rate of the pole piece active layer during the calcination of the pole piece active layer of the positive pole piece; based on the temperature range of the calcination temperature and the weight loss rate range of the weight loss rate, determine the SOH range of the health state SOH of the positive pole piece; based on the SOH range, process the pole piece active layer. The method provided in the present application can recover the active materials in the pole piece active layer to the maximum extent, thereby avoiding waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of a process for treating an active layer of a pole piece in one embodiment;

[0031] Figure 2 A schematic diagram of a flow chart of a method for determining a SOH range in one embodiment;

[0032] Figure 3 A schematic diagram of a process for treating an active layer of a pole piece in another embodiment;

[0033] Figure 4 It is a structural block diagram of a pole piece active layer processing device in one embodiment;

[0034] Figure 5FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0036] In one embodiment, Figure 1 As shown, a method for processing an active layer of an electrode is provided. This embodiment uses the method applied to a terminal as an example for illustration. It can be understood that the method can also be applied to a server, and can also be applied to a system including a terminal and a server, and is implemented through the interaction between the terminal and the server. In this embodiment, the method includes the following steps:

[0037] S102, for the positive electrode plate of the battery cell, during the process of calcining the active layer of the positive electrode plate, obtaining the calcination temperature and the weight loss rate of the active layer of the positive electrode plate.

[0038] Among them, battery cells are the basic units that constitute the battery and are the core part of the battery for storing and releasing electrical energy. In the battery system, multiple cells can be combined in series or parallel to form a battery module or battery pack to meet different application requirements; the pole piece active layer refers to a composite layer coated on the aluminum foil current collector, which contains positive electrode active materials, conductive agents and binders, and is responsible for storing and releasing lithium ions and participating in the electrochemical reaction of the battery; the weight loss rate refers to the ratio of the mass lost by a material under specific conditions (such as high temperature, corrosion or chemical reaction) to its initial mass, usually expressed as a percentage, which is used to evaluate the stability or loss degree of the material.

[0039] Optionally, the positive electrode sheets can be obtained by finely disassembling the battery cells, and the electrolyte infiltrated in the positive electrode sheets can be removed by low-temperature drying technology to prevent the weight loss of the electrolyte during the subsequent sintering process from interfering with the classification of the positive electrode sheets.

[0040] S104, determining the state of health SOH range of the positive electrode sheet based on the temperature range of the calcination temperature and the weight loss rate range of the weight loss rate.

[0041] Among them, the state of health (SOH) of the positive electrode refers to the degree to which the positive electrode maintains its original performance during use, usually expressed as a percentage, reflecting the degradation of key parameters such as capacity, internal resistance and cycle life relative to a new battery.

[0042] Optionally, by analyzing the weight loss rate of the active layer of the electrode piece at different calcination temperatures, the SOH range of the positive electrode piece can be determined.

[0043] S106. Based on the SOH range, the active layer of the electrode is processed.

[0044] Optionally, in order to recover all active materials as much as possible after the electrode active layer is processed, different processing methods may be used to process the electrode active layer according to the SOH range in which the SOH is located.

[0045] In the above-mentioned electrode active layer processing method, for the positive electrode of the battery cell, during the process of calcining the electrode active layer of the positive electrode, the calcination temperature and the weight loss rate of the electrode active layer are obtained; based on the temperature range of the calcination temperature and the weight loss rate range of the weight loss rate, the SOH range of the health state SOH of the positive electrode is determined; based on the SOH range, the electrode active layer is processed. The method provided by the present application can recover the active materials in the electrode active layer to the maximum extent, thereby avoiding waste of resources.

[0046] In some embodiments, Figure 2 As shown, based on the temperature range of the calcination temperature and the weight loss rate range, the SOH range of the health state SOH of the positive electrode sheet is determined, including:

[0047] S202: When the calcination temperature is within the first temperature range and the weight loss rate is within the first weight loss rate range, determine that the SOH is within the first SOH range.

[0048] S204. When the calcination temperature is within the second temperature range and the weight loss rate is not within the first weight loss rate range, determine that the SOH is within the second SOH range; wherein the lower limit value of the second temperature range is not less than the upper limit value of the first temperature range, and the lower limit value of the second SOH range is not less than the upper limit value of the first SOH range.

[0049] Optionally, the first temperature range can be 25-550°C, and the first weight loss rate range can be greater than 7.5%. At this time, the first SOH range is less than 70%; if the weight loss rate is less than 7.5%, it means that the health of the electrode is good. At this time, continue to increase the temperature to 550-1000°C (second temperature range), the active layer of the electrode will further lose weight, and the second SOH range at this time is not less than 70%.

[0050] In this embodiment, the corresponding SOH range is determined based on the different ranges of the calcination temperature and the weight loss rate, so that the electrode active layer processing method selected based on the determined SOH range can better improve the recovery rate of the active material.

[0051] In some embodiments, the second SOH range includes a third SOH range and a fourth SOH range, and the lower limit value of the fourth SOH range is not less than the upper limit value of the third SOH range; when the calcination temperature is within the second temperature range and the weight loss rate is not within the first weight loss rate range, determining that the SOH is within the second SOH range includes: when the weight loss rate is within the second weight loss rate range, determining that the SOH is within the third SOH range; wherein the upper limit value of the second weight loss rate range is not greater than the lower limit value of the first weight loss rate range; when the weight loss rate is within the third weight loss rate range, determining that the SOH is within the fourth SOH range; wherein the upper limit value of the third weight loss rate range is not greater than the lower limit value of the second weight loss rate range.

[0052] Optionally, when the calcination temperature is in the range of 550-1000°C and the weight loss rate is in the range of 2%-7.5% (the second weight loss rate range), the SOH range is 70-80% (the third SOH range); when the calcination temperature is in the range of 550-1000°C and the weight loss rate does not exceed 2% (the third weight loss rate range), the SOH range is greater than 80% (the fourth SOH range).

[0053] In this embodiment, the corresponding SOH range is determined based on the different ranges of the calcination temperature and the weight loss rate, so that the electrode active layer processing method selected based on the determined SOH range can better improve the recovery rate of the active material.

[0054] In some embodiments, the pole piece active layer is processed based on the SOH range in which the SOH is located, including: when the SOH is within the first SOH range or within the third SOH range, the pole piece active layer is processed based on a wet recovery technology; when the SOH is within the fourth SOH range, the pole piece active layer is processed based on a high temperature sintering technology.

[0055] Among them, wet recovery technology is to dissolve and separate the metal components in the active layer of the electrode through chemical solutions (such as acidic or alkaline solutions) to achieve material recovery and reuse; high-temperature sintering technology is to cause physical or chemical changes in the materials in the active layer of the electrode through high-temperature treatment, such as sintering into a dense solid, to restore or improve its performance.

[0056] Optionally, when the SOH is within the first SOH range, it means that the structure of the active material is unstable and in poor condition, and the active material has begun to decompose when the temperature is low. At this time, the electrode active layer can be treated with wet recovery technology; when the SOH is within the third SOH range, it means that the active material is severely decomposed in the high temperature section, the material structure is poor, and it is not suitable for direct regeneration to restore the material structure. At this time, the electrode active layer can be treated with wet recovery technology.

[0057] Optionally, if the weight loss rate does not exceed 2% in the range of 550-1000°C, it means that the structure of the active material is relatively stable, and the material can be repaired by direct lithium replenishment technology; if the weight loss rate in the range of 550-1000°C is between 1.5-2%, and the health of the electrode is between 80-90%, mixed lithium replenishment and sintering can be carried out to synthesize regenerated positive electrode materials, with a short recycling process, high economy, and green environmental protection; when the weight loss rate in the range of 550-1000°C is less than 1.5%, the material lacks less lithium, the structure is stable, and the health of the electrode is above 90%, and mixed lithium replenishment and regeneration can be carried out.

[0058] In this embodiment, based on the different SOH ranges of the positive electrode plate, different treatment methods are selected to recover the active layer of the plate, so as to maximize the recovery rate of the active material.

[0059] In some embodiments, before obtaining the calcination temperature and the weight loss rate of the electrode active layer, it also includes: when the state of charge SOC of the battery cell is not greater than the SOC threshold, based on a preset separation method, separating the electrode active layer from the positive electrode.

[0060] Among them, the state of charge (SOC) refers to the ratio of the current remaining power of the battery to the full capacity of the battery, usually expressed as a percentage. SOC reflects the degree of charge and discharge of the battery and is an important parameter for evaluating the remaining power and usage status of the battery.

[0061] Optionally, before processing the positive electrode sheet, the battery cell needs to be fully discharged to reduce the SOC of the battery cell to 0%, so that the negative electrode lithium ions can be embedded back into the positive electrode material as much as possible.

[0062] In this embodiment, when the state of charge SOC of the battery cell is not greater than the SOC threshold, the electrode active layer is separated from the positive electrode plate based on a preset separation method, which can make the separation process of the electrode active layer more complete.

[0063] In some embodiments, the preset separation method is a pole piece powdering method, an acidic stripping method, or an alkaline stripping method.

[0064] Among them, the electrode powdering method is to separate the active material on the electrode from the current collector by mechanical crushing and grinding to form powdered active material; the acid stripping method is to use acidic solution (such as sulfuric acid or hydrochloric acid) to dissolve and strip the active material on the electrode to separate it from the current collector; the alkaline stripping method is to use alkaline solution (such as sodium hydroxide or potassium hydroxide) to dissolve and strip the active material on the electrode to separate it from the current collector.

[0065] In this embodiment, the electrode active layer is separated from the positive electrode by using an electrode powdering method, an acidic stripping method or an alkaline stripping method, which can make the separation process of the electrode active layer more complete.

[0066] In one embodiment, Figure 3 As shown, another method for processing the active layer of the pole piece is provided, and the method includes the following contents:

[0067] The retired battery cell is fully discharged to 0 SOC%, so that the negative electrode lithium ions are embedded back into the positive electrode material as much as possible, and then the positive electrode plate is obtained through fine disassembly, and the electrolyte infiltrated in the plate is removed through low-temperature drying technology to prevent the weight loss of the electrolyte from interfering with the classification of the plate during the subsequent sintering process. Then the positive electrode active layer is obtained by stripping. There is no limit to the separation method in this step, and it can be done by powdering the plate, acid stripping or alkaline stripping, etc. The obtained plate active layer is calcined in an air atmosphere, and the plate is classified by statistically calculating the weight loss rate in different temperature sections, and the recycling method is confirmed according to the different states of the plate.

[0068] When the weight loss rate of the active layer of the electrode is greater than 7.5% at 25-550°C, it means that the material structure is unstable and in poor condition. The active substance has begun to decompose at low temperatures, and the corresponding electrode health state is less than 70%, which can be wet-processed for recovery.

[0069] If the weight loss rate is less than 7.5%, it means that the health of the electrode is in good condition. If the temperature continues to rise, the active layer will lose weight further. If the weight loss rate of the active layer is greater than 2% at 550-1000°C, it means that the active material is severely decomposed in the high temperature section, the material structure is poor, and it is not suitable for direct regeneration to restore the material structure. At this time, the health of the electrode is between 70% and 80%, and wet recovery can be carried out. If the weight loss rate in the high temperature section does not exceed 2%, it means that the structure is relatively stable and the material can be repaired by direct lithium replenishment technology. The weight loss rate is between 1.5 and 2%, and the health of the electrode is between 80 and 90%. The material can be mixed with lithium replenishment and sintered to synthesize regenerated positive electrode materials. The recycling process is short, the economy is high, and it is green and environmentally friendly. When the weight loss rate is less than 1.5%, the material lacks less lithium, the structure is stable, and the health of the electrode is above 90%, and it can be mixed with lithium replenishment and regenerated.

[0070] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0071] Based on the same inventive concept, the embodiment of the present application also provides a device for processing the active layer of a pole piece for implementing the above-mentioned method for processing the active layer of a pole piece. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above-mentioned method, so the specific limitations in one or more embodiments of the device for processing the active layer of a pole piece provided below can refer to the limitations of the method for processing the active layer of a pole piece above, and will not be repeated here.

[0072] In an exemplary embodiment, Figure 4 As shown, a device 400 for processing an active layer of a pole piece is provided, comprising: an acquisition module 401, a determination module 402 and a processing module 403, wherein:

[0073] The acquisition module 401 is used to acquire the calcination temperature and the weight loss rate of the active layer of the positive electrode sheet of the battery cell during the calcination of the active layer of the positive electrode sheet.

[0074] The determination module 402 is used to determine the state of health SOH range of the positive electrode sheet based on the temperature range of the calcination temperature and the weight loss rate range of the weight loss rate.

[0075] The processing module 403 is used to process the active layer of the electrode based on the SOH range in which the SOH is located.

[0076] In some embodiments, the determination module 402 includes:

[0077] The first determining unit is used to determine that the SOH is within a first SOH range when the calcination temperature is within a first temperature range and the weight loss rate is within a first weight loss rate range.

[0078] The second determination unit is used to determine that the SOH is within a second SOH range when the calcination temperature is within the second temperature range and the weight loss rate is not within the first weight loss rate range; wherein the lower limit value of the second temperature range is not less than the upper limit value of the first temperature range, and the lower limit value of the second SOH range is not less than the upper limit value of the first SOH range.

[0079] In some embodiments, the second SOH range includes a third SOH range and a fourth SOH range, and the lower limit value of the fourth SOH range is not less than the upper limit value of the third SOH range; the second determination unit is also used to determine that the SOH is within the third SOH range when the weight loss rate is within the second weight loss rate range; wherein the upper limit value of the second weight loss rate range is not greater than the lower limit value of the first weight loss rate range; and when the weight loss rate is within the third weight loss rate range, determine that the SOH is within the fourth SOH range; wherein the upper limit value of the third weight loss rate range is not greater than the lower limit value of the second weight loss rate range.

[0080] In some embodiments, the processing module 403 is also used to process the pole piece active layer based on a wet recovery technology when the SOH is within the first SOH range or within the third SOH range; and to process the pole piece active layer based on a high temperature sintering technology when the SOH is within the fourth SOH range.

[0081] In some embodiments, the electrode active layer processing device 400 is specifically used to separate the electrode active layer from the positive electrode based on a preset separation method when the state of charge SOC of the battery cell is not greater than the SOC threshold.

[0082] In some embodiments, the electrode active layer processing device 400 is also used to preset the separation method as an electrode powdering method, an acidic stripping method or an alkaline stripping method.

[0083] Each module in the above-mentioned electrode active layer processing device can be fully or partially implemented by software, hardware and their combination. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the corresponding operations of each of the above modules.

[0084] In an exemplary embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as shown in FIG. Figure 5As shown. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected via a system bus, and the communication interface, the display unit and the input device are connected to the system bus via the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a mobile cellular network, near field communication (Near Field Communication, NFC) or other technologies. When the computer program is executed by the processor, a method for processing an active layer of an electrode is implemented.

[0085] Those skilled in the art will understand that Figure 5 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0086] In an exemplary embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the following steps when executing the computer program: for a positive electrode plate of a battery cell, during the process of calcining an active layer of the positive electrode plate, obtaining a calcination temperature and a weight loss rate of the active layer of the positive electrode plate; determining a SOH range of a state of health SOH of the positive electrode plate based on a temperature range of the calcination temperature and a weight loss rate range of the weight loss rate; and processing the active layer of the plate based on the SOH range.

[0087] In one embodiment, the processor determines the SOH range of the health state SOH of the positive electrode sheet based on the temperature range of the calcination temperature and the weight loss rate range of the weight loss rate when executing the computer program, including: when the calcination temperature is within the first temperature range and the weight loss rate is within the first weight loss rate range, determining that the SOH is within the first SOH range; when the calcination temperature is within the second temperature range and the weight loss rate is not within the first weight loss rate range, determining that the SOH is within the second SOH range; wherein the lower limit value of the second temperature range is not less than the upper limit value of the first temperature range, and the lower limit value of the second SOH range is not less than the upper limit value of the first SOH range.

[0088] In one embodiment, the second SOH range implemented when the processor executes the computer program includes a third SOH range and a fourth SOH range, and the lower limit value of the fourth SOH range is not less than the upper limit value of the third SOH range; when the calcination temperature is within the second temperature range and the weight loss rate is not within the first weight loss rate range, determining that the SOH is within the second SOH range includes: when the weight loss rate is within the second weight loss rate range, determining that the SOH is within the third SOH range; wherein the upper limit value of the second weight loss rate range is not greater than the lower limit value of the first weight loss rate range; when the weight loss rate is within the third weight loss rate range, determining that the SOH is within the fourth SOH range; wherein the upper limit value of the third weight loss rate range is not greater than the lower limit value of the second weight loss rate range.

[0089] In one embodiment, when the processor executes a computer program, the active layer of the pole piece is processed based on the SOH range in which the SOH is located, including: when the SOH is within the first SOH range or within the third SOH range, the active layer of the pole piece is processed based on the wet recovery technology; when the SOH is within the fourth SOH range, the active layer of the pole piece is processed based on the high temperature sintering technology.

[0090] In one embodiment, before obtaining the calcination temperature and the weight loss rate of the electrode active layer when the processor executes the computer program, it also includes: when the state of charge SOC of the battery cell is not greater than the SOC threshold, based on a preset separation method, separating the electrode active layer from the positive electrode.

[0091] In one embodiment, the preset separation method implemented when the processor executes the computer program is a pole piece powdering method, an acidic stripping method, or an alkaline stripping method.

[0092] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented: for a positive electrode plate of a battery cell, during the process of calcining the plate active layer of the positive electrode plate, a calcination temperature and a weight loss rate of the plate active layer are obtained; based on the temperature range of the calcination temperature and the weight loss rate range of the weight loss rate, a SOH range of a health state SOH of the positive electrode plate is determined; based on the SOH range, the plate active layer is processed.

[0093] In one embodiment, the computer program implemented when executed by the processor determines the SOH range of the health state SOH of the positive electrode sheet based on the temperature range of the calcination temperature and the weight loss rate range of the weight loss rate, including: when the calcination temperature is within the first temperature range and the weight loss rate is within the first weight loss rate range, determining that the SOH is within the first SOH range; when the calcination temperature is within the second temperature range and the weight loss rate is not within the first weight loss rate range, determining that the SOH is within the second SOH range; wherein the lower limit value of the second temperature range is not less than the upper limit value of the first temperature range, and the lower limit value of the second SOH range is not less than the upper limit value of the first SOH range.

[0094] In one embodiment, the second SOH range implemented when the computer program is executed by the processor includes a third SOH range and a fourth SOH range, and the lower limit value of the fourth SOH range is not less than the upper limit value of the third SOH range; when the calcination temperature is within the second temperature range and the weight loss rate is not within the first weight loss rate range, determining that the SOH is within the second SOH range includes: when the weight loss rate is within the second weight loss rate range, determining that the SOH is within the third SOH range; wherein the upper limit value of the second weight loss rate range is not greater than the lower limit value of the first weight loss rate range; when the weight loss rate is within the third weight loss rate range, determining that the SOH is within the fourth SOH range; wherein the upper limit value of the third weight loss rate range is not greater than the lower limit value of the second weight loss rate range.

[0095] In one embodiment, when the computer program is executed by the processor, the active layer of the electrode is processed based on the SOH range in which the SOH is located, including: when the SOH is within the first SOH range or within the third SOH range, the active layer of the electrode is processed based on the wet recovery technology; when the SOH is within the fourth SOH range, the active layer of the electrode is processed based on the high temperature sintering technology.

[0096] In one embodiment, before obtaining the calcination temperature and the weight loss rate of the electrode active layer when the computer program is executed by the processor, it also includes: when the state of charge SOC of the battery cell is not greater than the SOC threshold, based on a preset separation method, separating the electrode active layer from the positive electrode.

[0097] In one embodiment, the preset separation method implemented when the computer program is executed by the processor is a powdering method, an acidic stripping method, or an alkaline stripping method.

[0098] In one embodiment, a computer program product is provided, including a computer program, which implements the following steps when executed by a processor: for a positive electrode plate of a battery cell, during the process of calcining an active layer of the positive electrode plate, obtaining a calcination temperature and a weight loss rate of the active layer of the positive electrode plate; determining a state of health SOH range of the positive electrode plate based on a temperature range of the calcination temperature and a weight loss rate range of the weight loss rate; and processing the active layer of the plate based on the SOH range.

[0099] In one embodiment, the computer program implemented when executed by the processor determines the SOH range of the health state SOH of the positive electrode sheet based on the temperature range of the calcination temperature and the weight loss rate range of the weight loss rate, including: when the calcination temperature is within the first temperature range and the weight loss rate is within the first weight loss rate range, determining that the SOH is within the first SOH range; when the calcination temperature is within the second temperature range and the weight loss rate is not within the first weight loss rate range, determining that the SOH is within the second SOH range; wherein the lower limit value of the second temperature range is not less than the upper limit value of the first temperature range, and the lower limit value of the second SOH range is not less than the upper limit value of the first SOH range.

[0100] In one embodiment, the second SOH range implemented when the computer program is executed by the processor includes a third SOH range and a fourth SOH range, and the lower limit value of the fourth SOH range is not less than the upper limit value of the third SOH range; when the calcination temperature is within the second temperature range and the weight loss rate is not within the first weight loss rate range, determining that the SOH is within the second SOH range includes: when the weight loss rate is within the second weight loss rate range, determining that the SOH is within the third SOH range; wherein the upper limit value of the second weight loss rate range is not greater than the lower limit value of the first weight loss rate range; when the weight loss rate is within the third weight loss rate range, determining that the SOH is within the fourth SOH range; wherein the upper limit value of the third weight loss rate range is not greater than the lower limit value of the second weight loss rate range.

[0101] In one embodiment, when the computer program is executed by the processor, the active layer of the electrode is processed based on the SOH range in which the SOH is located, including: when the SOH is within the first SOH range or within the third SOH range, the active layer of the electrode is processed based on the wet recovery technology; when the SOH is within the fourth SOH range, the active layer of the electrode is processed based on the high temperature sintering technology.

[0102] In one embodiment, before obtaining the calcination temperature and the weight loss rate of the electrode active layer when the computer program is executed by the processor, it also includes: when the state of charge SOC of the battery cell is not greater than the SOC threshold, based on a preset separation method, separating the electrode active layer from the positive electrode.

[0103] In one embodiment, the preset separation method implemented when the computer program is executed by the processor is a powdering method, an acidic stripping method, or an alkaline stripping method.

[0104] 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, stored data, displayed data, 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 relevant data must comply with relevant regulations.

[0105] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory 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. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0106] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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 application.

[0107] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for processing an active layer of a pole piece, characterized in that: The method comprises: For a positive electrode plate of a battery cell, during the process of calcining an active layer of the positive electrode plate, obtaining a calcination temperature and a weight loss rate of the active layer of the positive electrode plate; Determining a state of health (SOH) range of the positive electrode sheet based on a temperature range of the calcination temperature and a weight loss rate range of the weight loss rate; Based on the SOH range in which the SOH is located, the pole piece active layer is processed.

2. The method according to claim 1, characterized in that The determining the SOH range of the state of health SOH of the positive electrode sheet based on the temperature range of the calcination temperature and the weight loss rate range of the weight loss rate includes: When the calcination temperature is within a first temperature range and the weight loss rate is within a first weight loss rate range, determining that the SOH is within a first SOH range; When the calcination temperature is within the second temperature range and the weight loss rate is not within the first weight loss rate range, it is determined that the SOH is within the second SOH range; wherein the lower limit value of the second temperature range is not less than the upper limit value of the first temperature range, and the lower limit value of the second SOH range is not less than the upper limit value of the first SOH range.

3. The method according to claim 2, characterized in that The second SOH range includes a third SOH range and a fourth SOH range, and the lower limit value of the fourth SOH range is not less than the upper limit value of the third SOH range; when the calcination temperature is within the second temperature range and the weight loss rate is not within the first weight loss rate range, determining that the SOH is within the second SOH range includes: When the weight loss rate is within the second weight loss rate range, determining that the SOH is within the third SOH range; wherein the upper limit value of the second weight loss rate range is not greater than the lower limit value of the first weight loss rate range; When the weight loss rate is within the third weight loss rate range, it is determined that the SOH is within the fourth SOH range; wherein the upper limit value of the third weight loss rate range is not greater than the lower limit value of the second weight loss rate range.

4. The method according to claim 3, characterized in that: The processing of the active layer of the pole piece based on the SOH range of the SOH includes: When the SOH is within the first SOH range or within the third SOH range, treating the pole piece active layer based on a wet recovery technology; When the SOH is within the fourth SOH range, the pole piece active layer is processed based on a high temperature sintering technology.

5. The method according to claim 1, characterized in that Before obtaining the calcination temperature and the weight loss rate of the active layer of the pole piece, the method further includes: When the state of charge (SOC) of the battery cell is not greater than a SOC threshold, the electrode sheet active layer is separated from the positive electrode sheet based on a preset separation method.

6. The method according to claim 5, characterized in that The preset separation method is a pole piece powdering method, an acidic stripping method or an alkaline stripping method.

7. A device for processing an active layer of a pole piece, characterized in that: The device comprises: An acquisition module, for acquiring a calcination temperature and a weight loss rate of the active layer of the positive electrode sheet of the battery cell during calcination of the active layer of the positive electrode sheet; A determination module, configured to determine a state of health (SOH) range of the positive electrode sheet based on a temperature range of the calcination temperature and a weight loss rate range of the weight loss rate; A processing module is used to process the pole piece active layer based on the SOH range in which the SOH is located.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

Images