Battery impregnation method, device and electronic equipment

Abstract

The present invention discloses a battery infiltration method, device and electronic device. The method comprises: placing a target battery in a target box, pressurizing the target box to a target pressure, wherein the target battery is a battery after liquid injection, and the target pressure is higher than normal pressure; leaving the target battery at the target pressure of the target box for a predetermined time; after depressurizing the target box, taking out the target battery to obtain the infiltrated target battery. The present invention solves the technical problem in the related art that the battery after liquid injection is left at rest in a normal pressure and high temperature environment to complete battery infiltration, resulting in a long rest time.

Description

Technical Field

[0001] The present invention relates to the field of batteries, and in particular to a battery impregnation method, device and electronic equipment. Background Art

[0002] Battery impregnation is one of the important processes in the production of lithium batteries. In the relevant technology, the method of dealing with battery impregnation is to place the battery after injection at normal pressure and high temperature (45°C) for 1 to 3 days to allow the electrolyte to fully infiltrate the battery core, which results in a long standing time and high investment cost. In addition, long-term high temperature will have an adverse effect on the electrolyte injected into the battery, thereby affecting the battery performance.

[0003] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0004] The embodiments of the present invention provide a battery impregnation method, device and electronic device to at least solve the technical problem in the related art that the battery after injection is placed in a normal pressure and high temperature environment to complete the battery impregnation, resulting in a long standing time.

[0005] According to one aspect of an embodiment of the present invention, a battery infiltration method is provided, comprising: placing a target battery in a target box, pressurizing the target box to a target pressure, wherein the target battery is a battery after liquid injection, and the target pressure is higher than normal pressure; allowing the target battery to stand at the target pressure of the target box for a predetermined period of time; after depressurizing the target box, taking out the target battery to obtain the infiltrated target battery.

[0006] Optionally, placing the target battery in the target box includes: placing the target battery on a tray, and placing the tray as a whole into the target box.

[0007] Optionally, pressurizing the target box to a target pressure comprises: pressurizing the target box to the target pressure by filling dry nitrogen into the target box.

[0008] Optionally, the target pressure has a pressure range of 50 KPa to 500 KPa higher than normal pressure.

[0009] Optionally, the predetermined duration is less than 12 hours.

[0010] Optionally, allowing the target battery to stand at the target pressure of the target box for a predetermined period of time includes: allowing the target battery to stand at the target pressure of the target box for a predetermined period of time until the residual amount of electrolyte in the target battery is stabilized, and / or until the electrodes in the target battery are uniformly moistened.

[0011] Optionally, allowing the target battery to stand at the target pressure of the target box for a predetermined period of time includes: allowing the target battery to stand at the target pressure of the target box for a predetermined period of time at room temperature.

[0012] Optionally, placing the target battery in a target box and pressurizing the target box to a target pressure includes: in a wetting link on a logistics line of the target battery, placing the target battery in a target box and pressurizing the target box to a target pressure; and after relieving the pressure on the target box, taking out the target battery to obtain the soaked target battery, further including: transferring the soaked target battery to a processing link after the wetting link on the logistics line.

[0013] Optionally, the target battery comprises a lithium battery.

[0014] According to another aspect of the present invention, there is provided a battery infiltration device, comprising: a pressurizing module, used to place a target battery in a target box, and pressurize the target box to a target pressure, wherein the target battery is a battery after liquid injection, and the target pressure is higher than normal pressure; a standing module, used to stand the target battery at the target pressure of the target box for a predetermined period of time; and a pressure relief module, used to take out the target battery after relieving the pressure of the target box to obtain the infiltrated target battery.

[0015] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium includes a stored executable program, wherein when the executable program is run, the device where the computer-readable storage medium is located is controlled to execute any one of the above-mentioned battery infiltration methods.

[0016] According to another aspect of the present invention, there is provided an electronic device, comprising: a memory storing an executable program; and a processor for running the program, wherein the program executes any one of the above-mentioned battery infiltration methods when running.

[0017] According to another aspect of the present invention, a computer program product is provided, comprising a computer program, wherein when the computer program is executed by a processor, the steps of any one of the battery infiltration methods are implemented.

[0018] In the embodiment of the present invention, a high-pressure static method is adopted to place the battery after liquid injection in a high-pressure environment, thereby achieving the purpose of significantly shortening the infiltration time, thereby achieving the technical effect of reducing cost investment and increasing production efficiency, and further solving the technical problem in the related art that the battery after liquid injection is placed in a normal pressure and high temperature environment to complete battery infiltration, resulting in a long static time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 is a flow chart of a battery impregnation method according to an embodiment of the present invention;

[0021] Figure 2 4 is a structural block diagram of a battery soaking device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 should fall within the scope of protection of the present invention.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0024] First, some nouns or terms that appear in the description of the embodiments of the present application are subject to the following explanations:

[0025] Battery injection: It is a key step in the battery manufacturing process. Its main purpose is to inject electrolyte into the battery core to provide a medium for the battery's charge and discharge reactions. The electrolyte is usually composed of lithium salts (such as LiPF6, LiClO4, LiBF4, etc.), solvents (such as ethylene carbonate, diethyl carbonate, dimethyl carbonate, etc.) and additives. It plays a role in conducting lithium ions, forming a solid electrolyte interface film (SEI film) inside the battery, and ensuring the stability of the chemical environment inside the battery.

[0026] Battery impregnation: It is a key step in the battery manufacturing process. Its main purpose is to allow the electrolyte to fully penetrate into the positive and negative electrode materials and the separator of the battery to ensure that the chemical reaction inside the battery can be carried out evenly and fully. Full impregnation can improve the electrochemical performance of the battery, such as battery capacity, cycle life and safety performance, reduce the bubbles inside the battery, avoid the existence of bubbles that lead to insufficient internal battery reactions, affect the battery life and stability, and form a stable SEI film to extend the battery life.

[0027] Lithium batteries are the energy core that powers new energy vehicles. The production and manufacturing of lithium batteries involves multiple processes, and their performance is closely related to the process and manufacturing equipment. Improving the production efficiency of each process, especially the key processes, is crucial to reducing production costs and improving the overall competitiveness of products.

[0028] The infiltration process after lithium battery injection is one of the important processes in the production of lithium batteries. The infiltration process after injection mainly involves placing the lithium battery after injection at a certain ambient temperature so that the electrolyte can be fully absorbed by the positive and negative electrode materials and diaphragms inside the lithium battery. In the related technology, most lithium batteries will be placed at normal pressure and 45°C for 1 to 3 days after injection to allow the electrolyte to fully infiltrate the battery core, which is convenient for subsequent formation and capacity testing. That is, it takes a long time to place the battery core under high temperature conditions to allow the electrolyte to fully infiltrate the battery core, resulting in high fixed equipment investment (for example, high-temperature equipment, static racks, sites, etc.) in the production line, and subsequent operation and maintenance costs are also high. Since the infiltration speed of the electrolyte in the battery core under normal pressure is limited (that is, limited by the capillary diffusion speed of the electrolyte in the positive and negative electrode materials and diaphragms), the infiltration temperature and standing time cannot be reduced at will, otherwise the insufficient infiltration of the battery core will seriously affect the performance of the lithium battery. In addition, under long-term high temperature conditions, the additive components in the electrolyte will also accelerate the reaction and affect the performance of the lithium battery.

[0029] In order to solve the problem that the temperature of the infiltration process in the above-mentioned production link is too high and the time is too long, resulting in high investment in fixed equipment of the production line, high subsequent operating costs, and an overall increase in the manufacturing cost of lithium batteries, and the lithium batteries are left standing at high temperatures for a long time, which has an adverse effect on the electrolyte, and will also affect the final product performance of the lithium batteries and the competitiveness of the products, in an embodiment of the present invention, an embodiment of a battery infiltration method is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that here.

[0030] Figure 1is a flow chart of a battery soaking method according to an embodiment of the present invention. Figure 1 As shown, the method comprises the following steps:

[0031] Step S102, placing the target battery in a target box, and pressurizing the target box to a target pressure, wherein the target battery is a battery after liquid injection, and the target pressure is higher than normal pressure.

[0032] As an optional embodiment, the execution subject of the method of this embodiment can be an integrated automated equipment for battery production and manufacturing, or it can be a part of an automated production line composed of multiple devices that execute some of the links. The above-mentioned execution subject may include an automated control system, which is responsible for coordinating the operation of the following parts to complete the battery infiltration link. For example, a logistics line is used to transfer batteries from one link to the next. A handling system is used to transport batteries to a certain device, such as a stacker, a robot arm, or a dedicated battery transporter. A high-pressure static box (i.e., a target box) can control the pressure inside, and is used to place the battery after injection for high-pressure static. A pressure control system is used to adjust and control the pressure in the target box.

[0033] As an optional embodiment, a variety of methods can be used when placing the target battery in the target box. For example, the battery can be directly placed in the target box, but the efficiency of direct placement is low, and the batteries need to be placed in the target box one by one, and the batteries may move or tilt in the target box, resulting in an insufficient infiltration effect. For another example, the target battery can be placed on a tray, and the tray is placed in the target box as a whole. Using a tray to load batteries not only facilitates batch processing of batteries, but also ensures the stability of the batteries during the pressurization process, avoids movement or collision of the batteries in the box, and further improves the production quality and efficiency of the batteries.

[0034] As an optional embodiment, when the target box is pressurized to the target pressure, a variety of methods can be used. For example, the target box can be pressurized to the target pressure by filling dry nitrogen into the target box. The use of dry nitrogen for pressurization can effectively prevent the increase of moisture inside the battery and avoid the decline of battery performance. At the same time, the inert properties of nitrogen can also protect the battery from oxidation, which is suitable for various environmental conditions in the battery production process. For another example, the box can be evacuated first, and then filled with high-pressure gas to reach the target pressure. This method can first remove the impurity gas that may exist in the box, and then pressurize it, which is suitable for scenarios with high gas purity requirements.

[0035] As an optional embodiment, when the target box is pressurized to the target pressure, the target pressure is higher than the normal pressure, specifically, it can be 50KPa to 500KPa higher than the normal pressure. Within this pressure range, the penetration effect of the electrolyte is optimal, which can ensure that the electrolyte is evenly distributed without damaging the battery structure, and is suitable for different types of batteries, such as cylindrical, square and soft-pack batteries.

[0036] Step S104, placing the target battery at the target pressure of the target box for a predetermined time period.

[0037] As an optional embodiment, when the target battery is placed in a target pressure of the target box for a predetermined time, the predetermined time may be less than 12 hours. Compared with the traditional static infiltration method, the infiltration time of the method of this embodiment is greatly shortened, which significantly improves the production efficiency of the battery and reduces the production cost, and is particularly suitable for the rapid production requirements of large-scale battery production lines.

[0038] As an optional embodiment, when the target battery is placed at the target pressure of the target box for a predetermined period of time, a variety of methods can be used to determine that the target battery has reached the wetting target and end the standing. For example, the target battery can be placed at the target pressure of the target box for a predetermined period of time until the residual amount of electrolyte in the target battery is stable and / or until the electrodes in the target battery are uniformly wetted. This process ensures that the electrolyte distribution inside the battery reaches the optimal state before the standing is ended, thereby ensuring that the infiltration link can achieve the effect of improving the electrochemical performance of the battery.

[0039] As an optional embodiment, when the target battery is placed at a target pressure in a target box for a predetermined period of time, the pressure of the stationary environment is the target pressure, and the temperature can be a variety of temperatures. For example, the same high temperature as the traditional static infiltration method can be used. At a high temperature of 45°C, the target battery is placed at a target pressure in the target box for a predetermined period of time. The high temperature and high pressure environment can further accelerate the speed of battery infiltration, but the high temperature will affect the performance of the electrolyte. For another example, the target battery can be placed at a target pressure in the target box at room temperature for a predetermined period of time. Pressurized infiltration at room temperature can avoid the impact of temperature changes on battery performance, making the battery production process more stable and suitable for the production of various batteries. At the same time, it can also shorten the time the battery is stationary and improve the infiltration efficiency.

[0040] Step S106, after the target box is depressurized, the target battery is taken out to obtain the soaked target battery.

[0041] As an optional embodiment, the method of the above embodiment can be implemented on the logistics line of battery production. For example, in the infiltration link on the logistics line of the target battery, the target battery can be placed in the target box and the target box can be pressurized to the target pressure; and after the target box is depressurized, the target battery can be taken out, and after obtaining the infiltrated target battery, the infiltrated target battery can be transferred to the processing link after the infiltration link on the logistics line. By combining the battery infiltration method with the logistics line, the battery production process can be made more continuous, the waiting time in the intermediate links can be reduced, and the overall efficiency of the production line can be improved. It is suitable for battery production lines with a high degree of automation.

[0042] As an optional embodiment, the target battery includes a lithium battery. For lithium batteries, the pressurized infiltration method can significantly improve the distribution of the electrolyte, and increase the cycle life and energy density of the battery. In addition, other types of batteries that need to go through the injection and infiltration stages can also use the above embodiment method to speed up the infiltration speed, for example, sodium ion batteries and other liquid electrolyte batteries.

[0043] Through the above steps, the electrolyte inside the battery can be distributed more evenly, reducing the probability of poor contact between the electrode and the electrolyte, thereby significantly improving the electrochemical performance and safety of the battery, effectively extending the battery life, and improving the stability and reliability of the battery. It can also shorten the time required for the infiltration process in the battery production process, significantly improving the production efficiency of the battery.

[0044] In combination with the above-mentioned embodiments and optional embodiments, an optional implementation is provided. In this optional implementation, a method for improving the wetting efficiency of lithium batteries after injection is proposed. This method places the entire battery after injection into a high-pressure environment, and accelerates the capillary diffusion rate of the electrolyte in the positive and negative electrode materials and the diaphragm to achieve the purpose of reducing the wetting time, thereby reducing the investment in the static rack, site investment and other investment costs, and can also eliminate the high-temperature environment, reduce the investment in high-temperature equipment, and avoid high temperature affecting battery performance. The method includes the following processing.

[0045] S1, battery tray. After the lithium battery is filled, the battery can be placed in a static tray as required by the tray assembly equipment, which is convenient for subsequent transportation and placement in a high-voltage box.

[0046] S2, put the battery into the high-voltage box. The pallet filled with batteries is transferred to the soaking stage through the logistics line, and the pallet filled with batteries is placed into the opened high-voltage box as a whole by the stacker or robot.

[0047] S3, pressurize the high-pressure box with nitrogen. Close the high-pressure box door, and pressurize the high-pressure box with dry nitrogen to make the high-pressure box reach a certain pressure (50Kpa to 500Kpa higher than normal pressure).

[0048] S4, high-voltage static. The battery in the pressurized high-voltage box is left to stand for a certain period of time to ensure that the electrolyte can fully infiltrate the positive and negative electrode materials and diaphragms inside the battery.

[0049] S5, depressurize and remove the battery and transfer to the next step. After the battery is soaked, the high-voltage box is depressurized first, and the box door is opened after the depressurization is completed. Then the battery tray is taken out by the stacker or robot, placed on the logistics line, and transferred to the next process.

[0050] By adopting the above-mentioned method of improving the wetting efficiency of lithium batteries after injection as an improved process, the wetting time of the battery after injection can be significantly reduced, the investment in static racks and sites can be reduced, the high-temperature static environment can be eliminated, the equipment site investment and operating costs can be significantly reduced, and the battery production efficiency and battery performance can be improved. Table 1 is a comparison table of the wetting time required for the original process and the improved process, as shown in Table 1. The high-temperature and normal-pressure environment of the original process requires 48 hours of standing to complete the battery infiltration. The improved process is changed to a normal temperature and high-pressure environment. When the pressure is 100Kpa higher than normal pressure, it takes 12 hours to complete the battery infiltration, which is significantly improved compared to the 48 hours of the original process. When the pressure is 200Kpa higher than normal pressure, it only takes 8 hours of standing to complete the battery infiltration, and the time required for infiltration is further shortened.

[0051] Table 1 Comparison of the immersion time required for the original process and the improved process

[0052]

[0053] According to an embodiment of the present invention, a battery soaking device is provided. Figure 2 is a structural block diagram of a battery soaking device according to an embodiment of the present invention, such as Figure 2 As shown, the device includes: a pressurizing module 202, a static module 204 and a pressure relief module 206. The device is described below.

[0054] A pressurizing module is used to place the target battery in a target box and pressurize the target box to a target pressure, wherein the target battery is a battery after liquid injection and the target pressure is higher than normal pressure; a standing module is connected to the pressurizing module and is used to keep the target battery at the target pressure of the target box for a predetermined period of time; a pressure relief module is connected to the standing module and is used to relieve the pressure of the target box and then take out the target battery to obtain the infiltrated target battery.

[0055] It should be noted here that the above-mentioned pressurizing module 202, static module 204 and pressure relief module 206 correspond to steps S102 to S106 in the embodiment, and the examples and application scenarios implemented by multiple modules and corresponding steps are the same, but are not limited to the contents disclosed in the above-mentioned embodiment.

[0056] As an optional embodiment, the pressurizing module includes a placement unit, which is used to place the target battery on a tray and place the tray as a whole into the target box.

[0057] As an optional embodiment, the pressurizing module further includes: a pressurizing unit. The pressurizing unit is used to pressurize the target box to a target pressure by filling dry nitrogen into the target box.

[0058] As an optional embodiment, the target pressure has a pressure range of 50 KPa to 500 KPa higher than normal pressure.

[0059] As an optional embodiment, the predetermined time period is less than 12 hours.

[0060] As an optional embodiment, the static module includes: a first static unit. The first static unit is used to statically place the target battery at a target pressure in a target box for a predetermined period of time until the residual amount of electrolyte in the target battery is stabilized and / or until the electrodes in the target battery are uniformly wetted.

[0061] As an optional embodiment, the static module further includes: a second static unit. The second static unit is used to statically place the target battery at a target pressure of the target box at room temperature for a predetermined period of time.

[0062] As an optional embodiment, the device further includes: a transfer module. The transfer module is used to place the target battery in a target box and pressurize the target box to a target pressure during the infiltration stage on the logistics line of the target battery; and after the target box is depressurized, the target battery is taken out to obtain the infiltrated target battery, and then the infiltrated target battery is transferred to a processing stage after the infiltration stage on the logistics line.

[0063] As an optional embodiment, the target battery includes a lithium battery.

[0064] According to an embodiment of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium includes a stored executable program, wherein when the executable program is run, the device where the computer-readable storage medium is located is controlled to execute any one of the above-mentioned battery infiltration methods.

[0065] According to an embodiment of the present invention, an electronic device is provided, comprising: a memory storing an executable program; and a processor for running the program, wherein the program executes any one of the above-mentioned battery infiltration methods when running.

[0066] According to an embodiment of the present invention, a computer program product is provided, including a computer program, wherein when the computer program is executed by a processor, the steps of any one of the above methods are implemented.

[0067] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0068] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0069] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0070] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0071] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0072] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0073] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A battery impregnation method, characterized in that: include: Placing a target battery in a target box, and pressurizing the target box to a target pressure, wherein the target battery is a battery after liquid injection, and the target pressure is higher than normal pressure; Allowing the target battery to stand at the target pressure of the target box for a predetermined period of time; After the target box is depressurized, the target battery is taken out to obtain the soaked target battery.

2. The method according to claim 1, characterized in that The target pressure has a pressure range of 50Kpa to 500Kpa higher than normal pressure.

3. The method according to claim 1, characterized in that The predetermined duration is less than 12 hours.

4. The method according to claim 1, characterized in that The step of placing the target battery at the target pressure of the target box for a predetermined period of time comprises: The target battery is left to stand at the target pressure of the target housing for a predetermined period of time until the residual amount of electrolyte in the target battery is stabilized and / or until the electrodes in the target battery are uniformly wetted.

5. The method according to claim 1, characterized in that The step of placing the target battery at the target pressure of the target box for a predetermined period of time comprises: Under normal temperature, the target battery is placed at the target pressure of the target box for a predetermined period of time.

6. The method according to claim 1, characterized in that Placing the target battery in a target box and pressurizing the target box to a target pressure comprises: placing the target battery in a target box and pressurizing the target box to a target pressure in a wetting step on a logistics line of the target battery; and After the target box is depressurized, the target battery is taken out to obtain the soaked target battery, and the method further includes: transferring the soaked target battery to a processing link after the soaking link on the logistics line.

7. A battery impregnation device, characterized in that: include: A pressurizing module, used for placing a target battery in a target box and pressurizing the target box to a target pressure, wherein the target battery is a battery after liquid injection, and the target pressure is higher than normal pressure; A static module, used for allowing the target battery to be static at the target pressure of the target box for a predetermined period of time; The pressure relief module is used to relieve the pressure of the target box and then take out the target battery to obtain the soaked target battery.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored executable program, wherein when the executable program is run, the device where the computer-readable storage medium is located is controlled to execute the battery infiltration method according to any one of claims 1 to 6.

9. An electronic device, characterized in that: include: A memory storing an executable program; A processor is used to run the program, wherein the battery infiltration method described in any one of claims 1 to 6 is executed when the program is run.

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.

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