Safety evaluation method and device of battery pack, computer device and storage medium

Abstract

The application relates to a battery pack safety evaluation method and device, computer equipment and a storage medium. A battery pack of an electric vehicle is divided into multiple sub-block regions, a deformation variable corresponding to each sub-block region corresponding to a collision type is determined, and a danger degree quantitative value of each sub-block region is determined according to the deformation variable corresponding to each sub-block region corresponding to the collision type. In the method, the safety of the battery pack of the electric vehicle can be evaluated, and the risk of battery thermal runaway when the electric vehicle collides is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of battery management, and in particular to a safety evaluation method and device for a battery pack, a computer device and a storage medium. BACKGROUND

[0002] With the development of the automobile industry, in recent years, new energy vehicles have become an unstoppable force, and their emergence has occupied a part of the market of traditional oil vehicles. From the development trend of the new energy vehicle industry, pure electric vehicles have gradually become the mainstream.

[0003] However, as the main energy storage element of electric vehicles, the battery pack loaded with battery monomers is the core component of electric vehicles, and can directly affect the performance of electric vehicles. When an electric vehicle is involved in a collision accident, the battery in the electric vehicle is subjected to impact and extrusion, causing deformation, and the winding core of the battery may experience thermal runaway, resulting in a fire.

[0004] Therefore, how to evaluate the safety of the battery pack of the electric vehicle to reduce the risk of thermal runaway of the battery in the event of a collision accident has become a technical problem to be solved by those skilled in the art. SUMMARY

[0005] Therefore, it is necessary to provide a safety evaluation method and device for a battery pack, a computer device and a storage medium to evaluate the safety of the battery pack of the electric vehicle and reduce the risk of thermal runaway of the battery in the event of a collision accident.

[0006] In a first aspect, the present application provides a safety evaluation method for a battery pack, the method comprising:

[0007] dividing the battery pack of the electric vehicle into a plurality of sub-block regions;

[0008] determining the deformation variable of each sub-block region corresponding to the collision type;

[0009] determining the risk degree quantization value of each sub-block region according to the deformation variable of each sub-block region corresponding to the collision type.

[0010] In one embodiment, the method further comprises:

[0011] According to the size of the risk degree quantization value of each sub-block region, when the electric vehicle is driving normally, starting from the sub-block region corresponding to the maximum risk degree quantization value, sequentially controlling each sub-block region to release the electric quantity.

[0012] In one of the embodiments, if the number of collision types is multiple, the risk degree quantization value of each sub-block region is determined according to the deformation variable of each sub-block region corresponding to the collision type, including:

[0013] The damage value of each sub-block region corresponding to each collision type is determined according to the deformation variable of each sub-block region corresponding to each collision type.

[0014] The risk degree quantization value of each sub-block region is determined according to the weight corresponding to each collision type and the damage value of each sub-block region.

[0015] In one of the embodiments, the damage value of each sub-block region corresponding to each collision type is determined according to the deformation variable of each sub-block region corresponding to each collision type, including:

[0016] The damage value of each sub-block region corresponding to each collision type is determined according to the number and deformation variable of the battery monomer in each sub-block region corresponding to each collision type.

[0017] In one of the embodiments, the damage value of each sub-block region corresponding to each collision type is determined according to the number and deformation variable of the battery monomer in each sub-block region corresponding to each collision type, including:

[0018] If the number of battery monomers in the sub-block region is one, the damage value of one battery monomer under the corresponding collision type is determined according to the deformation variable of the one battery monomer.

[0019] The damage value of one battery monomer under the corresponding collision type is taken as the damage value of the corresponding sub-block region.

[0020] In one of the embodiments, the damage value of each sub-block region corresponding to each collision type is determined according to the number and deformation variable of the battery monomer in each sub-block region corresponding to each collision type, including:

[0021] If the number of battery monomers in the sub-block region is multiple, the damage value of each battery monomer in the sub-block region under the corresponding collision type is determined according to the deformation variable of each battery monomer in the sub-block region.

[0022] The damage value of each battery monomer in the sub-block region under the corresponding collision type is determined according to the damage value of each battery monomer in the sub-block region under the corresponding collision type.

[0023] The frequency of each collision type occurring in the electric vehicle in a preset period is obtained.

[0024] The weight corresponding to each collision type is determined according to the frequency of each collision type.

[0025] In a second aspect, the embodiments of the present application provide a safety evaluation device of a battery pack, which comprises:

[0026] The dividing module is configured to divide the battery pack of the electric vehicle into a plurality of sub-block regions.

[0027] The first determining module is configured to determine a deformation variable corresponding to each sub-block region corresponding to the collision type.

[0028] The second determining module is configured to determine a risk degree quantization value of each sub-block region according to the deformation variable corresponding to each sub-block region corresponding to the collision type.

[0029] In a third aspect, an embodiment of the present application provides a computer device, including a memory and a processor, the memory stores a computer program, and the processor implements the steps of the method provided in any one of the embodiments of the first aspect when executing the computer program.

[0030] In a fourth aspect, an embodiment of the present application provides a computer readable storage medium, which stores a computer program, and the computer program implements the steps of the method provided in any one of the embodiments of the first aspect when executed by a processor.

[0031] In a fifth aspect, an embodiment of the present application further provides a computer program product, including a computer program, and the computer program implements the steps of the method provided in any one of the embodiments of the first aspect when executed by a processor.

[0032] The above-mentioned battery pack safety evaluation method, device, computer device and storage medium divide the battery pack of the electric vehicle into a plurality of sub-block regions, determine a deformation variable corresponding to each sub-block region corresponding to the collision type, and determine a risk degree quantization value of each sub-block region according to the deformation variable corresponding to each sub-block region corresponding to the collision type. In the method, the battery pack of the electric vehicle is divided into a plurality of sub-block regions, and the deformation variable corresponding to each sub-block region under different collision types is comprehensively considered to obtain the risk degree quantization value of each sub-block region, that is, the dangerous region in the battery pack is determined. Therefore, the method can evaluate the safety of the battery pack of the electric vehicle, and reduce the risk of battery thermal runaway when the electric vehicle collides. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a block structure diagram of the battery pack in an embodiment of the battery pack safety evaluation method;

[0034] Figure 2 It is a flowchart of the battery pack safety evaluation method in an embodiment;

[0035] Figure 3 It is a block structure diagram of the battery pack in an embodiment;

[0036] Figure 4 It is a block structure diagram of the battery pack in another embodiment;

[0037] Figure 5 A schematic diagram of a battery pack structure in one embodiment;

[0038] Figure 6 A schematic diagram of a front collision of an electric vehicle in one embodiment;

[0039] Figure 7 A schematic diagram of a side collision of an electric vehicle in another embodiment;

[0040] Figure 8 A schematic diagram of a battery pack structure in another embodiment;

[0041] Figure 9 A schematic diagram of a safety evaluation method of a battery pack in another embodiment;

[0042] Figure 10 A schematic diagram of damage values of a battery pack partition region in one embodiment;

[0043] Figure 11 A schematic diagram of damage values of a battery pack partition region in another embodiment;

[0044] Figure 12 A schematic diagram of a safety evaluation method of a battery pack in another embodiment;

[0045] Figure 13 A schematic diagram of a safety evaluation method of a battery pack in another embodiment;

[0046] Figure 14 A schematic diagram of a battery pack partition structure in another embodiment;

[0047] Figure 15 A schematic diagram of a safety evaluation method of a battery pack in another embodiment;

[0048] Figure 16 A schematic diagram of a safety evaluation method of a battery pack in another embodiment;

[0049] Figure 17 A schematic diagram of a safety evaluation method of a battery pack in another embodiment;

[0050] Figure 18 A block diagram of a safety evaluation device of a battery pack in one embodiment;

[0051] Figure 19 An internal structure diagram of a computer device in one embodiment. DETAILED DESCRIPTION

[0052] In order to make the purposes, technical solutions and advantages of the present application clearer, further detailed descriptions will be given to the present application in combination 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 not used to limit the present application.

[0053] The safety evaluation method of the battery pack provided by the embodiments of the present application can be applied in the application environment as shown in the figure. Figure 1 The terminal 102 communicates with the server 104 through the network. The data storage system can store the data required to be processed by the server 104. The data storage system can be integrated on the server 104, or placed on the cloud or other network servers. The terminal 102 can be, but is not limited to, various personal computers, notebook computers, smart phones and tablet computers, etc. The server 104 can be implemented by an independent server or a server cluster composed of multiple servers.

[0054] The embodiments of the present application provide a safety evaluation method and device of a battery pack, computer equipment and a storage medium, which can evaluate the safety of the battery pack of an electric vehicle and reduce the risk of battery thermal runaway when the electric vehicle is involved in an accident.

[0055] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems will be described in detail below through embodiments and in combination with the accompanying drawings. The following specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described again in some embodiments.

[0056] In order to make the purposes, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0057] In one embodiment, as shown in the figure, Figure 2 A safety evaluation method of a battery pack is provided. The embodiment relates to the specific process of first dividing the battery pack of an electric vehicle into multiple sub-block regions, and then determining the quantitative value of the danger degree of each sub-block region according to the deformation variable of each sub-block region corresponding to the collision type. The embodiment includes the following steps:

[0058] S201, dividing the battery pack of an electric vehicle into multiple sub-block regions.

[0059] The vehicle refers to a device for human walking or transportation, such as a bicycle, a car, a motorcycle, a train, a ship, etc. With the change of the times and the progress of science and technology, electric vehicles are popular, and pure electric vehicles are considered as the most important internal combustion engine replacement technology. The electric vehicle is a vehicle that meets the requirements of road traffic, safety regulations and the like, and is driven by a vehicle-mounted power source and driven by an electric motor.

[0060] The electric vehicle includes a two-wheeled electric vehicle, a three-wheeled electric vehicle, a four-wheeled electric vehicle, etc.

[0061] The electric vehicle is a vehicle driven by electricity, and the electricity is stored in a battery pack. The battery pack can be considered as the heart of the electric vehicle, and provides driving power for the whole vehicle. The battery pack is mainly composed of a shell envelope.

[0062] Before the safety evaluation of the battery pack of the electric vehicle, the battery pack needs to be divided into a plurality of block regions, such as Figure 3 as shown in Figure 3 The battery pack of the electric vehicle is divided into four block regions, and the battery pack is evenly divided; alternatively, the battery pack can be unevenly divided, for example, as shown in Figure 4 as shown in Figure 4 The battery pack is divided into four uneven block regions.

[0063] It should be noted that the division of the battery pack and the number of block regions are not limited in the present application.

[0064] S202, determining the deformation amount of each block region corresponding to the collision type.

[0065] During the normal driving of the electric vehicle, if the electric vehicle has a traffic accident, i.e. the electric vehicle is collided, the shape of the battery pack in the electric vehicle will change with the collision of the electric vehicle. If the battery pack is divided into a plurality of block regions, the deformation amount of each block region corresponding to different collision types may be different.

[0066] For example, according to the collision direction and the consequences caused by the accident, the collision type can be divided into two-car frontal collision, side collision, rear collision and bottom collision. The frontal collision can be divided into: 100% frontal overlap rigid barrier collision, 40% frontal offset collision, 25% frontal offset collision, etc. according to the overlap area of the two vehicles.

[0067] The electric vehicle in the present application is illustrated by taking an electric vehicle as an example, as shown in Figure 5 as shown in Figure 5It is a top view of a battery pack in a conventional electric vehicle, and the battery pack includes a plurality of battery monomers, which are the smallest units of power batteries and also the power storage units, Figure 5 The right side is the direction of the front of the electric vehicle, and the upper side is the driving side direction.

[0068] Alternatively, the deformation of each sub-block area corresponding to each collision type can be determined according to a collision test or a simulation model test. Specifically, a collision test or a simulation model test can be performed on each collision type to determine the damage of the corresponding battery pack under each collision type, and based on the sub-block areas divided in S201, the deformation of each sub-block area corresponding to each collision type under each collision type is obtained.

[0069] As shown in Figure 6 , Figure 6 is a schematic diagram simulating a front 100% overlap rigid barrier collision of two electric vehicles. At this time, the battery pack in the electric vehicle is damaged, and the deformation of each sub-block area corresponding to each collision type is determined according to the damage degree of the battery pack. As shown in Figure 7 , Figure 7 is a schematic diagram of a side collision of an electric vehicle, and in Figure 8 , Figure 8 a schematic diagram of the damage of the battery pack after simulating the side collision using a simulation model is given, and the battery pack is divided into four sub-block areas. Based on the sub-block areas divided in the battery pack and the damage degree of each sub-block area of the battery pack, the deformation of each sub-block area under the side collision is determined.

[0070] Based on the above description, a simulation collision simulation test is performed on each collision type, and the deformation of each sub-block area corresponding to each collision type under each collision type is determined according to the sub-block areas divided in the battery pack.

[0071] S203, according to the deformation of each sub-block area corresponding to each collision type, determine the risk degree quantization value of each sub-block area.

[0072] Based on the deformation of each sub-block area corresponding to each collision type, the risk degree quantization value of each sub-block area can be determined. Specifically, the damage degree and damage position of the battery pack may be different for different collision types, so the deformation of each sub-block area in the battery pack is different under different collision types.

[0073] According to the deformation of each sub-block area corresponding to each collision type, the risk degree quantization value of each sub-block area in the battery pack is comprehensively obtained by considering each collision type. The risk degree quantization value represents the risk of thermal runaway of each sub-block area, and the higher the risk degree quantization value, the greater the risk of thermal runaway of the sub-block area.

[0074] The safety evaluation method of the battery pack divides the battery pack of the electric vehicle into a plurality of sub-block regions, determines the deformation variable of each sub-block region corresponding to the collision type, and determines the danger degree quantization value of each sub-block region according to the deformation variable of each sub-block region corresponding to the collision type. In this method, by dividing the battery pack of the electric vehicle into a plurality of sub-block regions, and comprehensively considering the deformation variable of each sub-block region under different collision types, the danger degree quantization value of each sub-block region is obtained, that is, the dangerous region in the battery pack is determined. Therefore, this method can evaluate the safety of the battery pack of the electric vehicle, and reduce the risk of battery thermal runaway when the electric vehicle collides.

[0075] In one embodiment, the embodiment includes: when the electric vehicle is driving normally, starting from the sub-block region corresponding to the maximum danger degree quantization value, sequentially controlling each sub-block region to release the electric quantity according to the size of the danger degree quantization value of each sub-block region.

[0076] Based on the obtained danger degree quantization value of each sub-block region in the battery pack, during the normal driving of the electric vehicle, the sub-block region with the maximum danger degree quantization value is controlled to discharge first according to the size of the danger degree quantization value of each sub-block region, and after the sub-block region with the maximum danger degree quantization value is discharged, the sub-block region with the second maximum danger degree quantization value is controlled to discharge. In this way, the sub-block regions are sequentially discharged according to the size of the danger degree quantization value.

[0077] For example, please continue to refer to the above Figure 8 If the danger degree quantization value of sub-block region 1 is 0, the danger degree quantization value of sub-block region 2 is 60, the danger degree quantization value of sub-block region 3 is 70, and the danger degree quantization value of sub-block region 2 is 0, then sub-block region 3 is controlled to discharge first, and after the electric quantity of sub-block region 3 is released, sub-block region 2 is controlled to discharge, and after the electric quantity of sub-block region 2 is released, sub-block region 1 can be randomly selected to discharge first, and after the electric quantity of sub-block region 1 is released, sub-block region 4 is controlled to discharge, or sub-block region 4 can be specified to discharge first, and after sub-block region 4 is discharged, sub-block region 1 is controlled to discharge.

[0078] Optionally, when the danger degree quantization values of the sub-block regions are the same, when it is the turn of the sub-block region with the same danger degree quantization value to discharge, any one of the sub-block regions can be randomly selected to release the electric quantity first, and then the other sub-block regions are selected to release the electric quantity, or the sub-block regions with the same danger degree quantization value can be sequentially discharged according to a predetermined specified order by a specified manner.

[0079] The embodiment discharges the sub-block area with the maximum quantified value of the danger degree first, and then controls each sub-block area to release the electric quantity in sequence. This method preferentially releases the area with the highest danger degree in the battery pack in a collision accident, thereby reducing the risk of thermal runaway of the battery pack.

[0080] In one embodiment, as shown in Figure 9 if the number of collision types is multiple, the quantified value of the danger degree of each sub-block area is determined according to the deformation variable of each sub-block area corresponding to the collision type, comprising:

[0081] S901, determining the damage value of each sub-block area corresponding to each collision type according to the deformation variable of each sub-block area corresponding to each collision type.

[0082] The battery pack integrates a plurality of battery monomers, and the life of the battery monomer is a key factor for the battery pack. Because the damage of any battery monomer will lead to the damage of the entire battery pack, the damage of the battery pack in a collision of an electric vehicle is actually the damage of the battery monomers in the battery pack.

[0083] The battery pack is divided into a plurality of sub-block areas, and the damage value of each sub-block area corresponding to each collision type is determined according to the deformation variable of each sub-block area corresponding to each collision type.

[0084] It can be understood that the deformation variable of the same sub-block area corresponding to different collision types is different, and the damage value of the same sub-block area corresponding to different collision types is also different. For example, please continue to refer to Figure 8 In a side collision, the sub-block area 2 deforms, and the damage value of the sub-block area 2 is 60, while in a front 100% overlap rigid barrier collision, the sub-block area 2 may not deform, and the damage value of the sub-block area 2 can be 0.

[0085] Optionally, for the same collision type, the damage value of the corresponding sub-block area can be determined based on the average of the damage values of each sub-block area in multiple collision tests, or the maximum damage value of the damage values of each sub-block area in multiple collision tests can be selected as the damage value of the corresponding sub-block area.

[0086] In one embodiment, the damage value of each sub-block area corresponding to each collision type can be determined according to the number and deformation variable of the battery monomers in each sub-block area corresponding to each collision type.

[0087] Because the way of dividing the battery pack into multiple sub-block areas is not limited, the number of battery monomers in each sub-block area can also be different, and the deformation variable of each sub-block area corresponding to different collision types is different, so the number and deformation variable of the battery monomers in each sub-block area corresponding to each collision type are considered to determine the damage value of each sub-block area corresponding to the collision type.

[0088] S902, determine the risk degree quantization value of each sub-block region according to the weight corresponding to each collision type and the damage value of each sub-block region.

[0089] Different collision types correspond to different weights, and the weight of a collision type is the proportion of the collision type in all collision types.

[0090] Therefore, the way to determine the risk degree quantization value of each sub-block region can be to perform weighted calculation on the weight corresponding to each collision type and the damage value of each sub-block region to determine the risk degree quantization value of each sub-block region. For example, if the collision types include side collision and bottom collision, and the battery pack is divided into 9 sub-block regions, the weight of side collision is 0.7, and the weight of bottom collision is 0.3; as shown in Figure 10 and Figure 11 Figure 10 is the damage value of each sub-block region in side collision, Figure 11 is the damage value of each sub-block region in bottom collision. Then the calculation of the risk degree quantization value of each sub-block region can be shown in formula (1).

[0091]

[0092] The above safety evaluation method of the battery pack determines the damage value of each sub-block region corresponding to each collision type according to the deformation amount of each sub-block region corresponding to each collision type, and determines the risk degree quantization value of each sub-block region according to the weight corresponding to each collision type and the damage value of each sub-block region. In this method, the risk degree quantization value of each sub-block region can be determined according to the weight corresponding to each collision type and the damage value of each sub-block region, the safety of the battery pack of the electric vehicle can be evaluated, and the risk of battery thermal runaway of the electric vehicle in the event of a collision accident can be reduced.

[0093] In the above embodiment, the damage value of each sub-block region corresponding to each collision type is determined according to the number and deformation amount of battery cells in each sub-block region corresponding to each collision type, and the determination of the damage value of each sub-block region according to the number and deformation amount of battery cells in each sub-block region is described in detail below.

[0094] In one embodiment, as shown in Figure 12 , the damage value of each sub-block region corresponding to each collision type is determined according to the number and deformation amount of battery cells in each sub-block region corresponding to each collision type, which includes the following steps:

[0095] S1201, if the number of battery cells in the sub-block region is 1, then the damage value of the 1 battery cell under the corresponding collision type is determined according to the deformation amount of the 1 battery cell.

[0096] ​If the number of battery cells in the sub-block region is only one, firstly, the damage value of the one battery cell is determined according to the deformation variable of the one battery cell, and the deformation variable of the same battery cell under different collision types can be different. Therefore, the damage value of the battery cell under the corresponding collision type is determined according to the deformation variable of the battery cell under each collision type.

[0097] For example, the deformation variable of the battery cell 1 under the side collision is 20, and the deformation variable of the battery cell 1 under the bottom collision can be 40. It can be determined that the damage value of the battery cell 1 under the side collision is 20, and the damage value of the battery cell 1 under the bottom collision is 40.

[0098] It should be noted that the damage value of the battery cell is determined according to the deformation variable of the battery cell, which can be determined according to the preset corresponding standard, and the greater the deformation variable of the battery cell, the greater the damage value.

[0099] S1202, the damage value of the one battery cell under the corresponding collision type is taken as the damage value of the corresponding sub-block region.

[0100] If the number of battery cells in the sub-block region is only one, the damage value of the battery cell can be directly taken as the damage value of the sub-block region to which the battery cell belongs. The damage values of different battery cells correspond to different collision types. Therefore, when there is only one battery cell in the sub-block region, the deformation variable of the battery cell can be taken as the damage value of the sub-block region to which the battery cell belongs under the corresponding collision type.

[0101] For example, please continue to refer to Figure 4 If there is only one battery cell in the sub-block region 3, and the damage value of the battery cell in the sub-block region 3 under the side collision of the electric vehicle is 20, it can be determined that the damage value of the sub-block region 3 under the side collision is 20.

[0102] The safety evaluation method of the battery pack described above, if the number of battery cells in the sub-block region is one, the damage value of the one battery cell under the corresponding collision type is determined according to the deformation variable of the one battery cell, and the damage value of the one battery cell under the corresponding collision type is taken as the damage value of the corresponding sub-block region. This method determines the damage value of the corresponding sub-block region when there is only one battery cell in the sub-block region under each collision type, further realizes the safety evaluation of the battery pack of the electric vehicle, and reduces the risk of battery thermal runaway when the electric vehicle collides.

[0103] In the above embodiment, the case of how to determine the damage value of the sub-block region when there is only one battery cell in the sub-block region is described, and the case of how to determine the damage value of the sub-block region when there are multiple battery cells in the sub-block region is described below. In one embodiment, as shown inFigure 13 As shown, the damage value of each sub-block region corresponding to each collision type is determined according to the number and deformation amount of the battery cells in each sub-block region corresponding to each collision type, and includes the following steps:

[0104] S1301, if the number of battery cells in the sub-block region is multiple, the damage value of each battery cell in the sub-block region under the corresponding collision type is determined according to the deformation amount of each battery cell in the sub-block region.

[0105] If the number of battery cells in the sub-block region is multiple, the damage value of each battery cell in the sub-block region under the corresponding collision type is determined according to the deformation amount of each battery cell in the sub-block region after the electric vehicle collides, that is, the deformation amount of one battery cell corresponds to one damage value.

[0106] For example, taking a side collision as an example, the battery pack is divided into 4 sub-block regions, as shown in Figure 14 As shown, Figure 14 The damage degree of the battery pack when the electric vehicle collides is taken as an example, and the sub-block region 3 is taken as an example. As can be seen in the sub-block region 3, battery cell 1 and battery cell 2 do not exist deformation, so the damage value of battery cell 1 and battery cell 2 can be determined as 0; battery cell 3 and battery cell 4 exist deformation, the damage value of battery cell 3 is determined according to the deformation amount of battery cell 3, the damage value of battery cell 4 is determined according to the deformation amount of battery cell 4, and according to the preset corresponding standard of the deformation amount and the damage value of the battery cell, the damage value of battery cell 3 can be determined as 50, and the damage value of battery cell 4 can be determined as 20.

[0107] Therefore, it can be determined that under the side collision, the damage value of battery cell 1 in the sub-block region 3 is 0, the damage value of battery cell 2 is 0, the damage value of battery cell 3 is 50, and the damage value of battery cell 4 is 18.

[0108] It should be noted that the preset corresponding standard of the deformation amount and the damage value of the battery cell is not limited, but must follow the principle that the greater the deformation amount, the higher the damage value.

[0109] Based on the same way as described above, the damage value of each battery cell in each sub-block region under each collision type can be obtained.

[0110] S1302, the damage value of the corresponding sub-block region is determined according to the damage value of each battery cell in the sub-block region under the corresponding collision type.

[0111] According to the damage value of each battery cell in the sub-block region under the corresponding collision type, the damage value of the sub-block region to which the battery cell belongs under the collision type can be determined by determining the maximum damage value in the damage value as the damage value of the corresponding sub-block region.

[0112] Optionally, the average of the damage values of all battery cells in the sub-block region can also be determined as the damage value of the corresponding sub-block region.

[0113] Taking a side collision as an example of the collision type, please continue to see Figure 14 Taking the sub-block region 3 as an example, the damage value of the sub-block region 3 is determined according to the damage values of the battery cells in the sub-block region 3. According to the determination that the damage value with the largest damage value is the damage value of the corresponding sub-block region, the damage value of the sub-block region 3 can be directly determined as 50 based on the damage values of the battery cells in the sub-block region 3 in the above S1301. If the damage value of the sub-block region is determined in the form of an average, the damage value of the sub-block region 3 can be determined as 17 based on the damage values of the battery cells in the sub-block region 3 in the above S1301.

[0114] Based on the same way as above, the damage values of each sub-block region under each collision type can be determined according to the damage values of each battery cell in each sub-block region under each collision type.

[0115] The safety evaluation method of the battery pack described above, if the number of battery cells in the sub-block region is multiple, the damage values of each battery cell in the sub-block region under the corresponding collision type are determined according to the deformation values of each battery cell in the sub-block region, and the damage value of the corresponding sub-block region is determined according to the damage values of each battery cell in the sub-block region under the corresponding collision type. This method determines the damage value of the corresponding sub-block region when the sub-block region includes multiple battery cells under each collision type, further realizes the safety evaluation of the battery pack of the electric vehicle, and reduces the risk of battery thermal runaway when the electric vehicle collides.

[0116] In one embodiment, as Figure 15 shown, the embodiment includes the following steps:

[0117] S1501, obtaining the frequency of each collision type of the electric vehicle occurring within a preset period.

[0118] The frequency of each collision type of the electric vehicle occurring within a preset period can be obtained in a public data set, and the frequency represents the proportion of each collision type in the total collision accidents.

[0119] For example, the types of collision accidents include a front 100% overlap rigid barrier collision, a 40% overlap offset front collision, a 25% overlap offset front collision, a vehicle side collision, a vehicle rear collision, and a bottom collision. If the total number of collision accidents in a preset period is 1000, the number of front 100% overlap rigid barrier collisions is 100, the number of 40% overlap offset front collisions is 100, the number of 25% overlap offset front collisions is 300, the number of vehicle side collisions is 200, the number of vehicle rear collisions is 200, and the number of bottom collisions is 100, the frequency of front 100% overlap rigid barrier collisions is 0.1, the frequency of 40% overlap offset front collisions is 0.1, the frequency of 25% overlap offset front collisions is 0.3, the frequency of vehicle side collisions is 0.2, the frequency of vehicle rear collisions is 0.2, and the frequency of bottom collisions is 0.1.

[0120] Optionally, the preset period can be the most recent year from the current time, and the frequency of each type of collision accident of the electric vehicle is obtained. The obtained data can be nationwide data.

[0121] S1502, determining the weight corresponding to each type of collision according to the frequency of each type of collision.

[0122] The manner of determining the weight corresponding to each type of collision can be directly taking the frequency of each type of collision as the weight of each type of collision.

[0123] If the frequency of front 100% overlap rigid barrier collisions is 0.1, the frequency of 40% overlap offset front collisions is 0.1, the frequency of 25% overlap offset front collisions is 0.3, the frequency of vehicle side collisions is 0.2, the frequency of vehicle rear collisions is 0.2, and the frequency of bottom collisions is 0.1, the weight of front 100% overlap rigid barrier collisions is 0.1, the weight of 40% overlap offset front collisions is 0.1, the weight of 25% overlap offset front collisions is 0.3, the weight of vehicle side collisions is 0.2, the weight of vehicle rear collisions is 0.2, and the weight of bottom collisions is 0.1.

[0124] The above method for safety evaluation of the battery pack obtains the frequency of each type of collision accident of the electric vehicle in a preset period, and determines the weight corresponding to each type of collision according to the frequency of each type of collision. By obtaining the weight corresponding to each type of collision, the risk degree quantization value of each sub-block region of the battery pack can be more accurately determined, and the safety of the battery pack of the electric vehicle can be evaluated, thereby reducing the risk of battery thermal runaway when the electric vehicle is involved in a collision accident.

[0125] In one embodiment, as Figure 16As shown, the idea of preferentially discharging the dangerous battery in the battery pack of the electric vehicle is given, if the electric vehicle collides, other components in the battery pack may also be extruded and impacted in the collision, there is a risk of short circuit and even fire explosion. And because the battery pack in the current electric vehicle is uniformly discharged, the dangerous battery in the specific area in the collision accident is not discharged in advance, therefore, an evaluation method is proposed to calculate the dangerous area of the battery pack, and a method of preferentially discharging the dangerous area is proposed. Specifically, the damage cloud of the battery pack under each collision type is obtained through the collision test or simulation test, and the collision case data in a certain period is obtained to determine the weight corresponding to each collision type. According to the weight of each collision type and the damage cloud of the battery pack, the comprehensive score of each region of the battery pack is determined; based on the comprehensive score of each sub-block region in the battery pack, the power of the battery monomer in the dangerous region of the battery pack is preferentially discharged during the normal driving process of the electric vehicle, so as to reduce the risk of thermal runaway of the battery pack in the collision accident.

[0126] In one embodiment, as shown in Figure 17 The embodiment takes the electric vehicle as an example, which includes the following steps:

[0127] S1701, the battery pack of the electric vehicle is divided into multiple blocks.

[0128] S1702, the deformation amount of each battery monomer in the battery pack under different collision conditions is determined through collision test or simulation test;

[0129] The collision conditions include front 100% overlap rigid barrier collision, 40% overlap offset front collision, 25% overlap offset front collision, vehicle side collision, vehicle rear collision, and bottom collision.

[0130] S1703, according to the multiple blocks of the battery pack and the deformation amount of each battery monomer in the battery pack under different collision conditions, the damage value of each block under each collision condition is determined.

[0131] S1704, according to the frequency of each collision condition occurring in a certain period, the weight of each collision condition is determined; the higher the frequency of collision condition, the higher the weight.

[0132] S1705, the damage value of each block under each collision condition and the weight corresponding to each collision condition are weighted and calculated to determine the comprehensive safety performance evaluation value of each block;

[0133] The higher the comprehensive safety performance evaluation value corresponding to the block, the higher the danger degree of the block.

[0134] S1706, according to the size of the comprehensive safety performance evaluation value corresponding to each block, the power of the battery monomer in each block is released in turn.

[0135] The implementation principle and technical effects of each step in the battery pack safety evaluation method provided by the embodiments are similar to those of the battery pack safety evaluation methods in the preceding embodiments, and will not be described here.

[0136] It should be understood that, although each step in the flowchart involved in each embodiment as described above is displayed in sequence according to the arrow, these steps are not necessarily executed in the order indicated by the arrow. Unless otherwise specified herein, the execution of these steps is not strictly limited in sequence, and these steps can be executed in other orders. Moreover, at least part of the steps in the flowchart involved in each embodiment as described above can include multiple steps or stages, which 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 sequential, but can be executed alternately or alternately with at least part of other steps or steps or stages in other steps.

[0137] Based on the same inventive concept, the embodiments of the present application also provide a battery pack safety evaluation device for implementing the above-mentioned battery pack safety evaluation method. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme described in the above method, so the specific limitations in one or more battery pack safety evaluation device embodiments provided below can refer to the limitations of the battery pack safety evaluation method described above, and will not be described here.

[0138] In one embodiment, as shown in Figure 18 A battery pack safety evaluation device 1800 is provided, comprising: a division module 1801, a first determination module 1802, and a second determination module 1802, wherein:

[0139] The division module 1801 is configured to divide the battery pack of the electric vehicle into a plurality of sub-block regions.

[0140] The first determination module 1802 is configured to determine the deformation variable of each sub-block region corresponding to the collision type.

[0141] The second determination module 1803 is configured to determine the risk degree quantization value of each sub-block region according to the deformation variable of each sub-block region corresponding to the collision type.

[0142] In one embodiment, the device 1800 further comprises:

[0143] The control module is configured to, according to the size of the risk degree quantization value of each sub-block region, sequentially control each sub-block region to release the electric quantity from the sub-block region corresponding to the maximum risk degree quantization value when the electric vehicle is normally driven.

[0144] In an embodiment, the second determining module 1801 comprises:

[0145] The first determining unit is configured to determine the damage value of each sub-block region corresponding to each collision type according to the deformation amount of each sub-block region corresponding to each collision type.

[0146] The second determining unit is configured to determine the risk degree quantization value of each sub-block region according to the weight corresponding to each collision type and the damage value of each sub-block region.

[0147] In an embodiment, the first determining unit comprises:

[0148] The first determining sub-unit is configured to determine the damage value of each sub-block region corresponding to each collision type according to the number of battery monomers and the deformation amount of each sub-block region corresponding to each collision type.

[0149] In an embodiment, the first determining sub-unit comprises:

[0150] The second determining sub-unit is configured to determine the damage value of one battery monomer under the corresponding collision type according to the deformation amount of the one battery monomer if the number of battery monomers in the sub-block region is one.

[0151] The third determining sub-unit is configured to take the damage value of the one battery monomer under the corresponding collision type as the damage value of the corresponding sub-block region.

[0152] In an embodiment, the first determining sub-unit comprises:

[0153] The fourth determining sub-unit is configured to determine the damage value of each battery monomer in the sub-block region under the corresponding collision type according to the deformation amount of each battery monomer in the sub-block region if the number of battery monomers in the sub-block region is multiple.

[0154] The fifth determining sub-unit is configured to determine the damage value of the corresponding sub-block region according to the damage value of each battery monomer in the sub-block region under the corresponding collision type.

[0155] In an embodiment, the second determining unit comprises:

[0156] The first obtaining sub-unit is configured to obtain the frequency of each collision type occurring in the electric vehicle within a preset period.

[0157] The sixth determining sub-unit is configured to determine the weight corresponding to each collision type according to the frequency of each collision type.

[0158] The modules in the safety evaluation device of the battery pack can be implemented by software, hardware, or a combination thereof, in whole or in part. The modules can be embedded in or independent of a processor in a computer device in hardware form, or stored in a memory in the computer device in software form, so that the processor can call and execute the operations corresponding to the modules.

[0159] In one embodiment, a computer device, which can be a terminal, is provided, and an internal structure diagram of the computer device can be as shown in Figure 19 The computer device includes a processor, a memory, a communication interface, a display screen, and an input device connected by a system bus. The processor of the computer device is configured 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 running the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is configured to perform wired or wireless communication with an external terminal. The wireless communication can be achieved by WIFI, mobile cellular network, NFC (Near Field Communication), or other technologies. The computer program is executed by the processor to implement a safety evaluation method for a battery pack. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen. The input device of the computer device can be a touch layer overlaid on the display screen, or a key, trackball, or touchpad arranged on the shell of the computer device, or an external keyboard, touchpad, or mouse, etc.

[0160] Those skilled in the art can understand that Figure 19 The structure shown in the above embodiment is only a block diagram of part of the structure related to the scheme of the present application, and does not limit the computer device to which the scheme of the present application is applied. Specifically, the computer device can include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0161] In one embodiment, a computer device is provided, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the following steps:

[0162] dividing the battery pack of the electric vehicle into a plurality of sub-block regions;

[0163] determining the deformation amount of each sub-block region corresponding to the collision type;

[0164] determining the risk degree quantization value of each sub-block region according to the deformation amount of each sub-block region corresponding to the collision type.

[0165] In one embodiment, the processor executes the computer program to further implement the following steps:

[0166] According to the magnitude of the risk degree quantization value of each sub-block region, when the electric vehicle is normally running, the sub-block region corresponding to the maximum risk degree quantization value is controlled to release the electric quantity first, and then the sub-block regions are controlled to release the electric quantity in sequence.

[0167] In one embodiment, the processor, when executing the computer program, also implements the following steps:

[0168] According to the deformation value of each sub-block region corresponding to each collision type, the damage value of each sub-block region corresponding to each collision type is determined.

[0169] According to the weight corresponding to each collision type and the damage value of each sub-block region, the risk degree quantization value of each sub-block region is determined.

[0170] In one embodiment, the processor, when executing the computer program, also implements the following steps:

[0171] According to the number of battery monomers in each sub-block region corresponding to each collision type and the deformation value, the damage value of each sub-block region corresponding to each collision type is determined.

[0172] In one embodiment, the processor, when executing the computer program, also implements the following steps:

[0173] If the number of battery monomers in the sub-block region is one, the damage value of one battery monomer under the corresponding collision type is determined according to the deformation value of the one battery monomer.

[0174] The damage value of one battery monomer under the corresponding collision type is taken as the damage value of the corresponding sub-block region.

[0175] In one embodiment, the processor, when executing the computer program, also implements the following steps:

[0176] If the number of battery monomers in the sub-block region is multiple, the damage value of each battery monomer in the sub-block region under the corresponding collision type is determined according to the deformation value of each battery monomer in the sub-block region.

[0177] According to the damage value of each battery monomer in the sub-block region under the corresponding collision type, the damage value of the corresponding sub-block region is determined. In one embodiment, the processor, when executing the computer program, also implements the following steps:

[0178] The frequency of each collision type occurring in a preset period is obtained.

[0179] According to the frequency of each collision type, the weight corresponding to each collision type is determined.

[0180] The computer device provided in the above embodiment has similar implementation principles and technical effects to the above method embodiments, and details are not repeated here.

[0181] In one embodiment, a computer readable storage medium is provided, having stored thereon a computer program which, when executed by a processor, implements the following steps:

[0182] dividing the battery pack of the electric vehicle into a plurality of sub-block regions;

[0183] determining a deformation variable of each sub-block region corresponding to the collision type;

[0184] determining a risk degree quantization value of each sub-block region according to the deformation variable of each sub-block region corresponding to the collision type.

[0185] In one embodiment, the computer program, when executed by the processor, further implements the following steps:

[0186] controlling each sub-block region to release an electric quantity in turn starting from the sub-block region corresponding to the maximum risk degree quantization value when the electric vehicle is normally driven according to the size of the risk degree quantization value of each sub-block region.

[0187] In one embodiment, the computer program, when executed by the processor, further implements the following steps:

[0188] determining a damage value of each sub-block region corresponding to each collision type according to the deformation variable of each sub-block region corresponding to each collision type;

[0189] determining a risk degree quantization value of each sub-block region according to the weight corresponding to each collision type and the damage value of each sub-block region.

[0190] In one embodiment, the computer program, when executed by the processor, further implements the following steps:

[0191] determining a damage value of each sub-block region corresponding to each collision type according to the number and the deformation variable of the battery monomer in each sub-block region corresponding to each collision type.

[0192] In one embodiment, the computer program, when executed by the processor, further implements the following steps:

[0193] if the number of the battery monomer in the sub-block region is one, determining a damage value of one battery monomer corresponding to the collision type according to the deformation variable of the one battery monomer;

[0194] taking the damage value of one battery monomer corresponding to the collision type as the damage value of the corresponding sub-block region.

[0195] In one embodiment, the computer program, when executed by the processor, further implements the following steps:

[0196] If the number of battery monomers in the sub-block region is multiple, the damage value of each battery monomer in the sub-block region under the corresponding collision type is determined according to the deformation value of each battery monomer in the sub-block region;

[0197] According to the damage value of each battery monomer in the sub-block region under the corresponding collision type, the dangerous degree quantization value of each sub-block region is determined.

[0198] The frequency of each collision type occurring in the electric vehicle in a preset period is obtained.

[0199] According to the frequency of each collision type, the corresponding weight of each collision type is determined.

[0200] The above embodiment provides a computer readable storage medium, and the implementation principle and technical effects are similar to the above method embodiments, which will not be repeated here.

[0201] In one embodiment, a computer program product is provided, comprising a computer program which, when executed by a processor, implements the following steps:

[0202] The battery pack of the electric vehicle is divided into multiple sub-block regions;

[0203] The deformation value corresponding to each sub-block region corresponding to the collision type is determined.

[0204] According to the deformation value corresponding to each sub-block region corresponding to the collision type, the dangerous degree quantization value of each sub-block region is determined.

[0205] In one embodiment, the computer program, when executed by the processor, further implements the following steps:

[0206] According to the size of the dangerous degree quantization value of each sub-block region, when the electric vehicle is normally driven, the sub-block region corresponding to the maximum dangerous degree quantization value is started in turn, and each sub-block region is controlled to release the electric quantity.

[0207] In one embodiment, the computer program, when executed by the processor, further implements the following steps:

[0208] According to the deformation value of each sub-block region corresponding to each collision type, the damage value of each sub-block region corresponding to each collision type is determined.

[0209] According to the weight corresponding to each collision type and the damage value of each sub-block region, the dangerous degree quantization value of each sub-block region is determined.

[0210] In one embodiment, the computer program, when executed by the processor, further implements the following steps:

[0211] According to the number and deformation of the battery cells in each sub-block area corresponding to each collision type, the damage value of each sub-block area corresponding to each collision type is determined.

[0212] In one embodiment, the computer program, when executed by the processor, further implements the following steps:

[0213] If the number of battery cells in the sub-block area is one, the damage value of the one battery cell under the corresponding collision type is determined according to the deformation of the one battery cell;

[0214] The damage value of the one battery cell under the corresponding collision type is taken as the damage value of the corresponding sub-block area.

[0215] In one embodiment, the computer program, when executed by the processor, further implements the following steps:

[0216] If the number of battery cells in the sub-block area is multiple, the damage value of each battery cell in the sub-block area under the corresponding collision type is determined according to the deformation of each battery cell in the sub-block area;

[0217] According to the damage value of each battery cell in the sub-block area under the corresponding collision type, the damage value of the corresponding sub-block area is determined. In one embodiment, the computer program, when executed by the processor, further implements the following steps:

[0218] Obtain the frequency of each collision type occurring in the electric vehicle within a preset period;

[0219] According to the frequency of each collision type, the weight corresponding to each collision type is determined.

[0220] The computer program product provided in the above embodiment has similar implementation principles and technical effects to the above method embodiments, and will not be described here.

[0221] It should be noted that the user information (including but not limited to user equipment information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the present application are all information and data authorized by the user or authorized by all parties.

[0222] Those skilled 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. The computer program can be stored in a non-volatile computer readable storage medium, and when the computer program is executed, the processes of the above-mentioned embodiments of the methods can be included. Any reference to memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (Read-Only Memory, ROM), magnetic tape, floppy disk, flash memory, optical storage, high-density embedded non-volatile memory, resistive memory (ReRAM), magnetoresistive random access memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric memory (Ferroelectric Random Access Memory, FRAM), phase change memory (Phase Change Memory, PCM), graphene memory, etc. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, etc. As an illustration but not limitation, RAM can be in various forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), etc. The database involved in the embodiments provided in the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in the embodiments provided in the present application can be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., without being limited thereto.

[0223] Any combination of the technical features of the above embodiments can be made. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0224] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A method of safety assessment of a battery pack, characterized by, The method comprises: dividing a battery pack of an electric vehicle into a plurality of sub-block regions; determining deformation values of each of the sub-block regions corresponding to a collision type, wherein the deformation values of each of the sub-block regions corresponding to different collision types are determined based on a collision test or a simulation model; determining a risk degree quantization value of each of the sub-block regions according to the deformation values of each of the sub-block regions corresponding to the collision type; The method further comprises: controlling each of the sub-block regions to release an electric quantity in turn starting from a sub-block region corresponding to a maximum risk degree quantization value according to the size of the risk degree quantization value of each of the sub-block regions when the electric vehicle is normally driven.

2. The method of claim 1, wherein, If the number of collision types is multiple, the determination of the risk degree quantization value of each of the sub-block regions according to the deformation values of each of the sub-block regions corresponding to the collision type comprises: determining damage values of each of the sub-block regions corresponding to each of the collision types according to the deformation values of each of the sub-block regions corresponding to each of the collision types; determining the risk degree quantization value of each of the sub-block regions according to the weight corresponding to each of the collision types and the damage values of each of the sub-block regions.

3. The method of claim 2, wherein, The determination of the damage values of each of the sub-block regions corresponding to each of the collision types according to the deformation values of each of the sub-block regions corresponding to each of the collision types comprises: determining the damage values of each of the sub-block regions corresponding to each of the collision types according to the number and deformation values of the battery cells in each of the sub-block regions corresponding to each of the collision types.

4. The method of claim 3, wherein, The determination of the damage values of each of the sub-block regions corresponding to each of the collision types according to the number and deformation values of the battery cells in each of the sub-block regions corresponding to each of the collision types comprises: if the number of battery cells in the sub-block region is one, determining the damage value of one battery cell in the sub-block region corresponding to the collision type according to the deformation value of the one battery cell; taking the damage value of one battery cell in the sub-block region corresponding to the collision type as the damage value of the corresponding sub-block region.

5. The method of claim 3, wherein, The determination of the damage values of each of the sub-block regions corresponding to each of the collision types according to the number and deformation values of the battery cells in each of the sub-block regions corresponding to each of the collision types comprises: if the number of battery cells in the sub-block region is multiple, determining the damage values of each of the battery cells in the sub-block region corresponding to the collision type according to the deformation values of each of the battery cells in the sub-block region; determining the damage value of the corresponding sub-block region according to the damage values of each of the battery cells in the sub-block region corresponding to the collision type.

6. The method of claim 2, wherein, The method further comprises: obtaining the frequency of each of the collision types occurring in the electric vehicle within a preset period; determining the weight corresponding to each of the collision types according to the frequency of each of the collision types.

7. A safety evaluation device of a battery pack, characterized by, The device comprises: a division module configured to divide a battery pack of an electric vehicle into a plurality of sub-block regions; a first determination module configured to determine deformation values of each of the sub-block regions corresponding to a collision type, wherein the deformation values of each of the sub-block regions corresponding to different collision types are determined based on a collision test or a simulation model; a second determination module configured to determine a risk degree quantization value of each of the sub-block regions according to the deformation values of each of the sub-block regions corresponding to the collision type. A second determining module is configured to determine a dangerous degree quantization value of each of the sub-block regions according to a deformation variable corresponding to each of the sub-block regions corresponding to the collision type; A control module is configured to, according to the size of the dangerous degree quantization value of each of the sub-block regions, control each of the sub-block regions to release the electric quantity in sequence starting from the sub-block region corresponding to the maximum dangerous degree quantization value when the electric vehicle is normally driven.

8. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that, The processor executes the computer program to implement the steps of the method in any one of claims 1 to 6.

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

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

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