Battery pack evaluation method, device, terminal and storage medium

Abstract

The application discloses a battery pack evaluation method and device, a terminal and a storage medium. The method comprises the following steps: calculating a plurality of first water pressures of a whole vehicle under a plurality of water crossing conditions based on a preset method; determining a target water crossing condition based on the plurality of first water pressures; collecting a second water pressure of the whole vehicle under the target water crossing condition, and evaluating whether the battery pack meets a preset water crossing requirement based on the second water pressure and the compression reaction force of the sealing strip of the battery pack in the whole vehicle. The application evaluates whether the battery pack meets the preset water crossing requirement through the second water pressure (i.e. the actual water pressure value) of the whole vehicle under the target water crossing condition, which not only meets the actual application, but also meets the requirement of the water crossing condition of the whole vehicle, so as to prevent the battery pack from leaking.

Description

Technical Field

[0001] This application relates to the field of new energy technology, and more specifically, to a battery pack evaluation method, apparatus, terminal, and storage medium. Background Technology

[0002] With the widespread application of new energy vehicles, the public's requirements for the sealing and waterproofing of battery packs in new energy vehicles are also gradually increasing.

[0003] Currently, the sealing and waterproofing requirements for new energy battery packs are basically all IPX7 / IPX9K. However, this waterproofing requirement only applies to the individual battery cells. In actual use, the battery pack is installed on the vehicle and the entire vehicle is waded through water. Therefore, the actual wading conditions of the battery pack are often much more complex than the IPX7 / IPX9K test. It is greatly affected by vehicle speed, water depth, and the installation environment of the battery pack in the vehicle. It is common for individual battery cells to pass the IPX7 / IPX9K test, but the battery pack still leaks when the entire vehicle is wading through water. Summary of the Invention

[0004] The main objective of this application is to provide a battery pack evaluation method, apparatus, terminal, and storage medium to solve the problem of battery pack leakage in related technologies.

[0005] To achieve the above objectives, in a first aspect, this application provides a battery pack evaluation method, comprising:

[0006] The vehicle is calculated under multiple water wading conditions based on a preset method. The multiple water wading conditions correspond one-to-one with the multiple first water pressures.

[0007] Based on multiple initial water pressures, the target water-crossing conditions are determined;

[0008] The second water pressure of the whole vehicle under the target wading conditions is collected, and based on the second water pressure and the compression reaction force of the sealing strip of the battery pack in the whole vehicle, the battery pack is evaluated to determine whether it meets the preset wading requirements.

[0009] In one possible implementation, multiple first water pressures of the vehicle under various wading conditions are calculated based on a preset method, including:

[0010] For each of the multiple water-related operating conditions, the first water pressure corresponding to each water-related operating condition is calculated based on the water-related parameters corresponding to each water-related operating condition.

[0011] The first water pressure corresponding to each water-related working condition is summarized to obtain multiple first water pressures.

[0012] In one possible implementation, for each of the multiple water-related operating conditions, based on the water-related parameters corresponding to each water-related operating condition, the first water pressure corresponding to each water-related operating condition is calculated, including:

[0013] Based on the water-related parameters and momentum conservation formula for each water-related working condition, the water velocity for each water-related working condition is determined.

[0014] Based on the formulas for water velocity and impulse, the impact force corresponding to each water-related working condition is determined;

[0015] Based on the impact force and the mass of the water, the first water pressure corresponding to each water-related working condition is determined.

[0016] In one possible implementation, the target water-crossing condition is determined based on multiple first water pressures, including:

[0017] Select a target water pressure from multiple first water pressures, wherein the target water pressure is the largest among the multiple first water pressures;

[0018] The water-related operating conditions corresponding to the target water pressure are taken as the target water-related operating conditions.

[0019] In one possible implementation, after determining the target water-crossing condition based on multiple first water pressures, the following is also included:

[0020] If the target water pressure is less than the compression reaction force, a wading test is conducted on the whole vehicle under the target wading conditions.

[0021] In one possible implementation, after determining the target water-crossing condition based on multiple first water pressures, the following is also included:

[0022] If the target water pressure is greater than the compression reaction force, replace the sealing strip or install a water-blocking structure at the sealing strip.

[0023] In one possible implementation, the second water pressure of the entire vehicle under the target wading conditions is collected, and based on the second water pressure and the compression reaction force of the sealing strip of the battery pack in the vehicle, the battery pack is evaluated to determine whether it meets the preset wading requirements, including:

[0024] Under the target water wading conditions, the values ​​of the pressure sensors located around the battery pack are read, and the values ​​of the pressure sensors are used as the second water pressure.

[0025] If the second water pressure is less than the compression reaction force of the sealing strip, the battery pack meets the preset water wading requirements.

[0026] In a second aspect, embodiments of the present invention provide a battery pack evaluation device, comprising:

[0027] The water pressure calculation module is used to calculate multiple first water pressures of the vehicle under multiple water wading conditions based on a preset method. The multiple water wading conditions correspond one-to-one with the multiple first water pressures.

[0028] The operating condition determination module is used to determine the target water-related operating conditions based on multiple first water pressures;

[0029] The evaluation module is used to collect the second water pressure of the whole vehicle under the target wading conditions, and evaluate whether the battery pack meets the preset wading requirements based on the second water pressure and the compression reaction force of the sealing strip of the battery pack in the whole vehicle.

[0030] Thirdly, embodiments of the present invention provide a terminal, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of any of the above battery pack evaluation methods.

[0031] Fourthly, embodiments of the present invention provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of any of the above battery pack evaluation methods.

[0032] This invention provides a battery pack evaluation method, apparatus, terminal, and storage medium, comprising: calculating multiple first water pressures of the vehicle under multiple wading conditions based on a preset method; determining a target wading condition based on the multiple first water pressures; collecting a second water pressure of the vehicle under the target wading condition; and evaluating whether the battery pack meets preset wading requirements based on the second water pressure and the compressive reaction force of the sealing strip of the battery pack in the vehicle. This invention evaluates whether the battery pack meets preset wading requirements by obtaining the second water pressure (i.e., the actual water pressure value) of the vehicle under the target wading condition. This not only conforms to practical applications but also meets the requirements of the vehicle's wading conditions, thus preventing battery pack leakage. Attached Figure Description

[0033] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings:

[0034] Figure 1 This is a flowchart illustrating the implementation of a battery pack evaluation method provided in an embodiment of the present invention.

[0035] Figure 2 This is a schematic diagram of a vehicle wading through water, provided in an embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of the water column structure provided in an embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of the water pressure sensor installation position provided in an embodiment of the present invention;

[0038] Figure 5 This is a schematic diagram of the structure of a battery pack evaluation device provided in an embodiment of the present invention;

[0039] Figure 6 This is a schematic diagram of the terminal provided in an embodiment of the present invention. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in sequences other than those illustrated or described herein.

[0042] It should be understood that in the various embodiments of the present invention, the sequence number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0043] It should be understood that in this invention, "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, 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 explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0044] It should be understood that in this invention, "multiple" refers to two or more. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, "and / or B" can represent: A existing alone, A and B existing simultaneously, and B existing alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "Contains A, B, and C", "Contains A, B, and C" means that all three A, B, and C are contained; "Contains A, B, or C" means that one of A, B, and C is contained; "Contains A, B, and / or C" means that any one, two, or three of A, B, and C are contained.

[0045] It should be understood that in this invention, "B corresponding to A", "B corresponding to A", "A and B correspond", or "B and A correspond" means that B is associated with A, and B can be determined based on A. Determining B based on A does not mean determining B solely based on A; B can also be determined based on A and / or other information. Matching A and B is defined as a similarity between A and B that is greater than or equal to a preset threshold.

[0046] Depending on the context, "if" as used here can be interpreted as "when," "when," "in response to determination," or "in response to detection."

[0047] The technical solution of the present invention will be described in detail below with reference to specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0048] To make the objectives, technical solutions, and advantages of the present invention clearer, specific embodiments will be described below in conjunction with the accompanying drawings.

[0049] In one embodiment, such as Figure 1 As shown, a battery pack evaluation method is provided, including the following steps:

[0050] Step S101: Calculate multiple first water pressures of the vehicle under multiple wading conditions based on a preset method.

[0051] Among them, multiple water-related working conditions correspond one-to-one with multiple first water pressures, and the multiple water-related working conditions are different types of water-related working conditions.

[0052] The calculation of multiple first water pressures for the vehicle under multiple wading conditions based on a preset method includes: for each wading condition, calculating the first water pressure corresponding to each wading condition based on the wading parameters corresponding to each wading condition, and then summing up the first water pressures corresponding to each wading condition to obtain multiple first water pressures.

[0053] Specifically, for each of the multiple water-related operating conditions, the first water pressure corresponding to each water-related operating condition is calculated based on the water-related parameters corresponding to each water-related operating condition. This includes: determining the water velocity corresponding to each water-related operating condition based on the water-related parameters and the momentum conservation formula; then determining the impact force corresponding to each water-related operating condition based on the water velocity and the impulse formula; and finally determining the first water pressure corresponding to each water-related operating condition based on the impact force and the mass of the water.

[0054] For example, since the vehicle wading test conditions can be provided by the vehicle manufacturer, or can be given with reference to national and local standards, the wading parameters of a certain vehicle wading test conditions given by Shanghai local standard test DB31 / T634 are shown in Table 1, including water depth, test length, vehicle speed and total time, etc.

[0055] Table 1 Water-related parameters for water-related operating conditions

[0056]

[0057] Based on the above water-related parameters, the first water pressure corresponding to this water-related working condition can be calculated. First, based on the water-related parameters and momentum conservation formula corresponding to each water-related working condition, the water velocity corresponding to each water-related working condition can be determined.

[0058] Specifically, such as Figure 2 As shown, in the wading parameters, the vehicle speed is v1, the water speed is v2, m1 is the mass of the vehicle, and m2 is the mass of the water. The water speed v2 = 3 * vehicle speed v1 can be calculated using the following steps:

[0059] m1v1+m2v2=m1v1'+m2v2';

[0060]

[0061] Combining the above equations for conservation of momentum and conservation of kinetic energy, we obtain:

[0062]

[0063] when

[0064] In other words, when the mass of water m2 is small, the water speed v2 is twice the vehicle speed v1, and the relative speed between the vehicle and the water is three times the vehicle speed, i.e., 3v1.

[0065] Since the vehicle travels at a constant speed in water wading conditions, assuming that the water speed v2 is 0 before it comes into contact with the vehicle, then after the vehicle impacts the water, the water speed v2 relative to the vehicle speed is 3 times the vehicle speed v1.

[0066] After calculating that the water velocity v2 = 3 times the vehicle speed v1, the impact force F_hydraulic force corresponding to this wading condition can be determined based on the formulas for water velocity and impulse. The specific calculation steps are as follows:

[0067] Impulse formula: M2 * V2 = F (hydraulic) * T

[0068] From the above impulse formula, we know that F_hydraulic = M² * V² / T

[0069] Where T represents the total duration of the water-related working conditions.

[0070] Once the impact force Fhydraulic is obtained, the first water pressure Pwater corresponding to this water-related working condition can be determined based on the impact force Fhydraulic and the mass m2 of the water. The specific calculation steps are as follows:

[0071] like Figure 3As shown, simplifying the impacting water in this wading condition into a water column, we can conclude that:

[0072] m² = ρ_water * V_water volume = ρ_water * S_area * V² * T

[0073] Where S is the area of ​​the bottom of the water column, and the height of the water column is V2*T (V water velocity*T time).

[0074] Substituting the above formula m2 = ρwater * Vwater volume = ρwater * S area * V2 * T into Pwater = F hydraulic force / S area, we get Pwater = ρwater * V2 2 .

[0075] It should be noted that the calculation method for the first water pressure for other water-related working conditions is similar to that for the water-related working conditions mentioned above, and will not be repeated here.

[0076] The first water pressure under each water-related working condition can be calculated using the water-related parameters described above.

[0077] Step S102: Determine the target water-crossing conditions based on multiple first water pressures.

[0078] After calculating the first water pressure under each water-related working condition, a target water pressure needs to be selected from multiple first water pressures. The target water pressure is the largest water pressure among multiple first water pressures, and the water-related working condition corresponding to the target water pressure is taken as the target water-related working condition.

[0079] Specifically, the maximum water pressure (target water pressure) is selected from multiple first water pressures. The target wading condition corresponding to this target water pressure is the most stringent wading condition. By selecting the most stringent wading condition, the accuracy of assessing whether the battery pack meets the preset wading requirements can be improved.

[0080] Once the target wading conditions are determined, the target water pressure corresponding to the target wading conditions needs to be compared with the compression reaction force of the battery pack. If the target water pressure is less than the compression reaction force, a wading test is conducted on the entire vehicle under the target wading conditions. If the target water pressure is greater than the compression reaction force, the sealing strip is replaced or a water-blocking structure is installed at the sealing strip to prevent water from directly impacting the sealing strip.

[0081] Step S103: Collect the second water pressure of the whole vehicle under the target wading conditions, and evaluate whether the battery pack meets the preset wading requirements based on the second water pressure and the compression reaction force of the sealing strip of the battery pack in the whole vehicle.

[0082] The battery pack's sealing strip is an elastomer. It achieves sealing by generating a compressive reaction force against the sealing surface after compression. The manufacturer's tests on the sealing strip reveal the relationship between the sealing strip's compression percentage and the compressive reaction force (elastic force). Then, by analyzing the sealing strip's compression percentage, the compression reaction force P of the sealing strip can be derived from the compression reaction force curve.

[0083] Because realistic testing of the entire vehicle under target wading conditions is required, water pressure sensors need to be installed around the battery pack. The measurement range of these sensors must include the maximum water pressure, and ideally, the upper limit should exceed the maximum water pressure by 50% to prevent damage to the sensors due to exceeding their measurement range during testing. Furthermore, the water pressure sensors should be positioned around the perimeter of the battery pack's mounting location on the vehicle. If the battery pack is installed under the vehicle chassis, the optimal placement of the water pressure sensors is as follows: Figure 4 As shown.

[0084] If a water-blocking structure is designed, a water pressure sensor needs to be placed at the rear of the water-blocking structure to measure whether the water-blocking structure has played a role in reducing water pressure.

[0085] Specifically, under the target wading conditions, the values ​​of the pressure sensors located around the battery pack are read and used as the second water pressure. If the second water pressure is less than the compression reaction force of the sealing strip, the battery pack meets the preset wading requirements. If the compression reaction force of the sealing strip is less than the second water pressure, it proves that the seal does not meet the preset wading requirements, and the sealing strip needs to be reselected or the water-blocking structure needs to be redesigned. The preset wading requirements are set according to specific circumstances and are not specifically limited here.

[0086] This invention provides a battery pack evaluation method, comprising: calculating multiple first water pressures of the vehicle under multiple wading conditions based on a preset method; determining a target wading condition based on the multiple first water pressures; collecting a second water pressure of the vehicle under the target wading condition; and evaluating whether the battery pack meets preset wading requirements based on the second water pressure and the compressive reaction force of the sealing strip of the battery pack in the vehicle. This invention evaluates whether the battery pack meets preset wading requirements by obtaining the second water pressure (i.e., the actual water pressure value) of the vehicle under the target wading condition. This not only conforms to practical applications but also meets the requirements of the vehicle's wading conditions, thus preventing battery pack leakage.

[0087] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0088] The following are device embodiments of the present invention. For details not described in detail, please refer to the corresponding method embodiments described above.

[0089] Figure 5 The diagram shows a structural schematic of a battery pack evaluation device according to an embodiment of the present invention. For ease of explanation, only the parts relevant to the embodiment of the present invention are shown. The battery pack evaluation device includes a water pressure calculation module 51, a working condition determination module 52, and an evaluation module 53, as detailed below:

[0090] The water pressure calculation module 51 is used to calculate multiple first water pressures of the whole vehicle under multiple water wading conditions based on a preset method, wherein the multiple water wading conditions correspond one-to-one with the multiple first water pressures;

[0091] The working condition determination module 52 is used to determine the target water-related working condition based on multiple first water pressures;

[0092] Evaluation module 53 is used to collect the second water pressure of the whole vehicle under the target wading conditions, and evaluate whether the battery pack meets the preset wading requirements based on the second water pressure and the compression reaction force of the sealing strip of the battery pack in the whole vehicle.

[0093] In one possible implementation, the water pressure calculation module 51 is also used to calculate the first water pressure corresponding to each of the multiple water-related working conditions based on the water-related parameters corresponding to each water-related working condition.

[0094] The first water pressure corresponding to each water-related working condition is summarized to obtain multiple first water pressures.

[0095] In one possible implementation, the water pressure calculation module 51 is also used to determine the water velocity corresponding to each water-related working condition based on the water-related parameters and momentum conservation formula corresponding to each water-related working condition.

[0096] Based on the formulas for water velocity and impulse, the impact force corresponding to each water-related working condition is determined;

[0097] Based on the impact force and the mass of the water, the first water pressure corresponding to each water-related working condition is determined.

[0098] In one possible implementation, the operating condition determination module 52 is further configured to select a target water pressure from a plurality of first water pressures, wherein the target water pressure is the largest water pressure among the plurality of first water pressures;

[0099] The water-related operating conditions corresponding to the target water pressure are taken as the target water-related operating conditions.

[0100] In one possible implementation, after the working condition determination module 52, there is also a first judgment module, which is used to conduct a wading test on the whole vehicle under the target wading working condition if the target water pressure is less than the compression reaction force.

[0101] In one possible implementation, after the working condition determination module 52, there is also a second judgment module, which is used to update the sealing strip or set a water-blocking structure at the sealing strip if the target water pressure is greater than the compression reaction force.

[0102] In one possible implementation, the evaluation module 53 is also used to read the value of a pressure sensor located around the battery pack under the target water wading conditions, and use the value of the pressure sensor as a second water pressure;

[0103] If the second water pressure is less than the compression reaction force of the sealing strip, the battery pack meets the preset water wading requirements.

[0104] Figure 6 This is a schematic diagram of a terminal provided in an embodiment of the present invention. Figure 6 As shown, the terminal 6 in this embodiment includes a processor 61, a memory 62, and a computer program 6 stored in the memory 62 and executable on the processor 61. When the processor 61 executes the computer program 63, it implements the steps in the various battery pack evaluation method embodiments described above, for example... Figure 1 Steps 101 to 103 are shown. Alternatively, when processor 61 executes computer program 63, it implements the functions of each module / unit in the above-described battery pack evaluation device embodiments, for example... Figure 5 The functions of modules / units 51 to 53 shown.

[0105] The present invention also provides a readable storage medium storing a computer program, which, when executed by a processor, is used to implement the battery pack evaluation method provided in the various embodiments described above.

[0106] The readable storage medium can be a computer storage medium or a communication medium. A communication medium includes any medium that facilitates the transfer of computer programs from one location to another. A computer storage medium can be any available medium accessible to a general-purpose or special-purpose computer. For example, a readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an Application-Specific Integrated Circuit (ASIC). Alternatively, the ASIC can be located in a user device. Of course, the processor and the readable storage medium can also exist as discrete components in a communication device. The readable storage medium can be a read-only memory (ROM), random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0107] The present invention also provides a program product including executable instructions stored in a readable storage medium. At least one processor of the device can read the executable instructions from the readable storage medium, and the execution of the executable instructions by the at least one processor causes the device to implement the battery pack evaluation methods provided in the various embodiments described above.

[0108] In the embodiments of the above-described device, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly manifested as being executed by a hardware processor, or executed by a combination of hardware and software modules within the processor.

[0109] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A battery pack evaluation method, characterized in that, include: The vehicle is calculated under multiple water wading conditions based on a preset method, wherein the multiple water wading conditions correspond one-to-one with the multiple first water pressures. Determining a target water-trapping condition based on the plurality of first water pressures includes: selecting a target water pressure from the plurality of first water pressures, wherein the target water pressure is the largest water pressure among the plurality of first water pressures; and taking the water-trapping condition corresponding to the target water pressure as the target water-trapping condition. The second water pressure of the vehicle under the target wading condition is collected, and based on the second water pressure and the compression reaction force of the sealing strip of the battery pack in the vehicle, the battery pack is evaluated to determine whether it meets the preset wading requirements.

2. The battery pack evaluation method as described in claim 1, characterized in that, The calculation of multiple first water pressures of the vehicle under multiple wading conditions based on a preset method includes: For each of the multiple water-related operating conditions, the first water pressure corresponding to each water-related operating condition is calculated based on the water-related parameters corresponding to each water-related operating condition. The first water pressure corresponding to each water-related working condition is summarized to obtain the plurality of first water pressures.

3. The battery pack evaluation method as described in claim 2, characterized in that, The step of calculating the first water pressure corresponding to each of the plurality of water-related operating conditions, based on the water-related parameters corresponding to each water-related operating condition, includes: Based on the water-related parameters and momentum conservation formula for each water-related working condition, the water velocity corresponding to each water-related working condition is determined. Based on the water velocity and impulse formulas, the impact force corresponding to each water-related working condition is determined; Based on the impact force and the mass of the water, the first water pressure corresponding to each water-related working condition is determined.

4. The battery pack evaluation method as described in claim 1, characterized in that, After determining the target water-related operating conditions based on the plurality of first water pressures, the process further includes: If the target water pressure is less than the compression reaction force, the vehicle is subjected to a wading test under the target wading conditions.

5. The battery pack evaluation method as described in claim 1, characterized in that, After determining the target water-related operating conditions based on the plurality of first water pressures, the process further includes: If the target water pressure is greater than the compression reaction force, update the sealing strip or install a water-blocking structure at the sealing strip.

6. The battery pack evaluation method as described in claim 1, characterized in that, The process involves collecting the second water pressure of the vehicle under the target wading conditions, and evaluating whether the battery pack meets the preset wading requirements based on the second water pressure and the compression reaction force of the sealing strip of the battery pack in the vehicle. This includes: Under the target water wading condition, the value of the pressure sensor located around the battery pack is read, and the value of the pressure sensor is used as the second water pressure; If the second water pressure is less than the compression reaction force of the sealing strip, the battery pack meets the preset water wading requirements.

7. A battery pack evaluation device, characterized in that, include: The water pressure calculation module is used to calculate multiple first water pressures of the vehicle under multiple water wading conditions based on a preset method, wherein the multiple water wading conditions correspond one-to-one with the multiple first water pressures; The working condition determination module is used to determine a target water-trapping working condition based on the plurality of first water pressures, including: selecting a target water pressure from the plurality of first water pressures, wherein the target water pressure is the largest water pressure among the plurality of first water pressures; and taking the water-trapping working condition corresponding to the target water pressure as the target water-trapping working condition; The evaluation module is used to collect the second water pressure of the vehicle under the target wading conditions, and evaluate whether the battery pack meets the preset wading requirements based on the second water pressure and the compression reaction force of the sealing strip of the battery pack in the vehicle.

8. A terminal, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the battery pack evaluation method as described in any one of claims 1 to 6.

9. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the battery pack evaluation method as described in any one of claims 1 to 6.

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