A method, device, equipment and medium for selecting a pre-tightening elastic unit

Abstract

An embodiment of the present invention discloses a method, device, equipment, and medium for selecting a pre-tightening elastic unit. The method includes: obtaining the vehicle weight and the battery pack weight of a vehicle to which the pre-tightening elastic unit to be selected is applied, and determining the initial number of suspension points of the battery pack and the initial compression amount of the pre-tightening elastic unit to be selected according to a preset strategy; determining the stiffness coefficient of the pre-tightening elastic unit to be selected based on the battery pack weight, the initial number of suspension points, and the initial compression amount, and determining the maximum total pre-tightening force of the pre-tightening elastic unit to be selected under a preset plane tolerance based on the stiffness coefficient; determining the numerical relationship between the maximum total pre-tightening force and the gravity corresponding to the vehicle weight. When the numerical relationship satisfies a preset relationship and the stability of the locking mechanism fixed by the pre-tightening elastic unit to be selected and the battery pack meets the preset stability requirement, the sum of the stiffness coefficient and the initial compression amount and the preset plane tolerance is used as the selection result. A process for selecting a pre-tightening elastic element is realized, and the selection result of the element is efficiently determined.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of computer technology, and in particular, to a method, device, equipment and medium for selecting a pre-tightening elastic unit. Background Art

[0002] Some electric vehicles achieve rapid battery swapping by adopting battery packs to solve problems such as too long charging time of electric vehicles and range anxiety. The battery pack needs to be fixed through a locking mechanism, and there is a pin-type locking mechanism that can achieve a one-point control and multi-point linkage locking and unlocking method. The main body of the pin-type locking mechanism is connected to the vehicle body end through a pre-tightening elastic unit; the lifting platform of the battery swapping station compresses the pre-tightening elastic unit through the main body of the lifting locking mechanism, so that the locking mechanism in the main body of the locking mechanism is tightened and disengaged, thereby realizing the locking and unlocking process.

[0003] The functions of the pre-tightening elastic unit include offsetting the flatness tolerance of the mating surface between the vehicle body end and the battery pack end to prevent the locking mechanisms of the same battery pack from not being able to be locked simultaneously; ensuring sufficient stiffness to prevent unlocking during driving due to the vertical vibration of the battery pack; requiring a certain amount of re-compressibility to ensure sufficient unlocking stroke of the locking mechanism; and reducing the vibration noise caused by the vibration of the battery pack. To meet the above functions of the pre-tightening elastic unit, the stiffness selection process of the pre-tightening elastic unit is relatively complex. Therefore, an efficient and accurate method for selecting the stiffness of the pre-tightening elastic unit needs to be proposed. Summary of the Invention

[0004] The embodiments of the present invention provide a method, device, equipment and medium for selecting a pre-tightening elastic unit to realize a complete selection process of the pre-tightening elastic element, so that the selected elastic element can meet the use requirements and improve the selection efficiency of the pre-tightening elastic element.

[0005] In a first aspect, the embodiments of the present invention provide a method for selecting a pre-tightening elastic unit, the method comprising:

[0006] Obtain the vehicle weight and the battery pack weight of the vehicle to which the pre-tightening elastic unit to be selected is applied, and based on the vehicle weight and the battery pack weight, determine the initial number of suspension points of the battery pack and the initial compression amount of the pre-tightening elastic unit to be selected according to a preset strategy;

[0007] Determine the stiffness coefficient of the pre-tightening elastic unit to be selected based on the battery pack weight, the initial number of suspension points and the initial compression amount, and determine the maximum total pre-tightening force of the pre-tightening elastic unit to be selected under a preset plane tolerance based on the stiffness coefficient;

[0008] Determine the numerical relationship between the maximum total pre-tightening force and the gravity corresponding to the vehicle weight, where the numerical relationship satisfies a preset relationship, and when the stability of the locking mechanism fixed by the pre-tightening elastic unit to be selected and the battery pack meets the preset stability requirements, use the sum of the stiffness coefficient, the initial compression amount, and the preset plane tolerance as the selection result.

[0009] In a second aspect, an embodiment of the present invention further provides a device for selecting a pre-tightening elastic unit, which includes:

[0010] An initial parameter determination module, configured to obtain the vehicle weight and the battery pack weight of a vehicle applying a pre-tightening elastic unit to be selected, and based on the vehicle weight and the battery pack weight, determine the initial number of lifting points of the battery pack and the initial compression amount of the pre-tightening elastic unit to be selected according to a preset strategy;

[0011] A pre-tightening force calculation module, configured to determine the stiffness coefficient of the pre-tightening elastic unit to be selected based on the battery pack weight, the initial number of lifting points, and the initial compression amount, and determine the maximum total pre-tightening force of the pre-tightening elastic unit to be selected under a preset plane tolerance based on the stiffness coefficient;

[0012] A selection determination module, configured to determine the numerical relationship between the maximum total pre-tightening force and the gravity corresponding to the vehicle weight, where the numerical relationship satisfies a preset relationship, and when the stability of the locking mechanism fixed by the pre-tightening elastic unit to be selected and the battery pack meets the preset stability requirements, use the sum of the stiffness coefficient, the initial compression amount, and the preset plane tolerance as the selection result.

[0013] In a third aspect, an embodiment of the present invention further provides a computer device, which includes:

[0014] One or more processors;

[0015] A memory, configured to store one or more programs;

[0016] When the one or more programs are executed by the one or more processors, the one or more processors implement a method for selecting a pre-tightening elastic unit as provided in any embodiment of the present invention.

[0017] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, it implements a method for selecting a pre-tightening elastic unit as provided in any embodiment of the present invention.

[0018] The above embodiments of the invention have the following advantages or beneficial effects:

[0019] In an embodiment of the present invention, first, the vehicle weight and the battery pack weight of a vehicle to which a pre-tightening elastic unit to be selected is applied are obtained, and based on the vehicle weight and the battery pack weight, the initial number of lifting points of the battery pack and the initial compression amount of the pre-tightening elastic unit to be selected are determined according to a preset strategy; then, based on the battery pack weight, the initial number of lifting points, and the initial compression amount, the stiffness coefficient of the pre-tightening elastic unit to be selected is determined, and based on the stiffness coefficient, the maximum total pre-tightening force of the pre-tightening elastic unit to be selected under a preset plane tolerance is determined; finally, the numerical relationship between the maximum total pre-tightening force and the gravity corresponding to the vehicle weight is determined. When the numerical relationship satisfies a preset relationship and the stability of the locking mechanism fixed by the pre-tightening elastic unit to be selected and the battery pack meets the preset stability requirement, the sum of the stiffness coefficient and the initial compression amount and the preset plane tolerance is used as the selection result. The technical solution of the embodiment of the present invention provides a complete selection process for pre-tightening elastic elements, taking into account various problems existing in pin-type locking mechanisms (including steel ball tensioning type) in this process, enabling the selected elastic elements to meet the usage requirements and improving the selection efficiency of pre-tightening elastic elements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a flowchart of a method for selecting a pre-tightening elastic unit provided in Embodiment 1 of the present invention;

[0021] Figure 2 is a flowchart of a method for selecting a pre-tightening elastic unit provided in Embodiment 2 of the present invention;

[0022] Figure 3 is a schematic structural diagram of a device for selecting a pre-tightening elastic unit provided in Embodiment 3 of the present invention;

[0023] Figure 4 is a schematic structural diagram of a server provided in Embodiment 4 of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the present invention, rather than limiting the present invention. Additionally, it should be noted that for the sake of description, only parts related to the present invention are shown in the drawings, not all structures.

[0025] Embodiment 1

[0026] Figure 1 is a flowchart of a method for selecting a pre-tightening elastic unit provided in Embodiment 1 of the present invention. This embodiment is applicable to the selection process of pre-tightening elastic elements for the locking mechanism of the battery pack of an electric vehicle. This method can be executed by a device for selecting a pre-tightening elastic unit, and this device can be implemented in a software and / or hardware manner and integrated into a computer device with application development functions.

[0027] As Figure 1 shown, the method for selecting a pre-tightening elastic unit includes the following steps:

[0028] S110. Obtain the vehicle weight and the battery pack weight of the vehicle to which the pre-tightening elastic unit to be selected is applied, and based on the vehicle weight and the battery pack weight, determine the initial number of lifting points of the battery pack and the initial compression amount of the pre-tightening elastic unit to be selected according to a preset strategy.

[0029] For different vehicle models, the vehicle weight is usually different, and the weight of the battery pack may also be different. During the process of selecting a pre-tightening elastic unit, the vehicle model of the vehicle to which the pre-tightening elastic unit is applied should be considered. When selecting a pre-tightening elastic unit, the corresponding vehicle weight and battery pack weight information can be read from a database, or a user interaction interface can be set up, and the user who needs to select an elastic element can directly input relevant information such as the vehicle and the battery pack in the user interaction interface. In this embodiment, the vehicle weight of the vehicle model using the locking structure including the pre-tightening elastic element is denoted as M1, and the battery pack weight is denoted as M2, where the vehicle weight is the weight of the whole vehicle after removing the battery pack. Then, the initial number of lifting points of the battery pack, denoted as n0, can be further determined. Specifically, the number of pre-tightening elastic units to be selected required can be determined according to the battery pack weight and the preset load-bearing value of a single pre-tightening elastic unit to be selected, as the initial number of lifting points. For example, usually the weight of a battery pack is 400 kg, and a pre-tightening elastic unit shares a load-bearing of 50 kg, then the initial number of lifting points can be set to 8, that is, n = 8. The initial compression amount of the pre-tightening elastic unit to be selected can be an initial value set by relevant professionals according to experience values, denoted as x. In a feasible implementation manner, different initial compression amount values can be set for different vehicle models, and different initial compression amounts can be set according to different vehicle models when selecting a pre-tightening elastic unit.

[0030] S120. Determine the stiffness coefficient of the pre-tightening elastic unit to be selected based on the battery pack weight, the initial number of lifting points, and the initial compression amount, and determine the maximum total pre-tightening force of the pre-tightening elastic unit to be selected under a preset plane tolerance based on the stiffness coefficient.

[0031] First, determine the total pre-tightening force according to the maximum acceleration value during the operation of the vehicle and the battery pack weight. This total pre-tightening force is the total pre-tightening force without considering the flatness tolerance of the mating plane between the vehicle body end and the battery pack end. Generally, during the driving process of an automobile, the acceleration at the battery pack is twice the acceleration of gravity (2g) or less. Therefore, the total pre-tightening force of the pre-tightening elastic unit is F = 2 * M2g.

[0032] Further, the pre-tightening force of a single pre-tightening elastic unit to be selected can be determined based on the number of initial suspension points and the total pre-tightening force, expressed as F1 = F / n. Then, the stiffness coefficient of the pre-tightening elastic unit to be selected is determined based on the pre-tightening force and the initial compression amount of the single pre-tightening elastic unit to be selected, expressed as k = F1 / x.

[0033] The maximum total pre-tightening force is the maximum total pre-tightening force when using a pre-tightening elastic unit with a stiffness coefficient of k considering the flatness tolerance of the mating plane between the vehicle body end and the battery pack end. The flatness tolerance of the mating plane between the vehicle body end and the battery pack end is related to the production and manufacturing processes of the vehicle and the battery pack. Products produced by different production lines will have different flatness tolerance values. This tolerance can be expressed as ε, and the specific data can be determined according to the average value of the historical flatness tolerance values. When n - 1 pre-tightening elastic units are over-compressed by ε and 1 pre-tightening elastic unit is under-compressed by ε, the total pre-tightening force of the elastic units is the largest at this time, which can be expressed as F max = k*(x + ε)*(n - 1) + k*(x - ε)*1.

[0034] S130. Determine the numerical relationship between the maximum total pre-tightening force and the gravity corresponding to the vehicle weight. When the numerical relationship satisfies the preset relationship and the stability of the locking mechanism fixed by the pre-tightening elastic unit to be selected and the battery pack meets the preset stability requirements, use the sum of the stiffness coefficient, the initial compression amount, and the preset flatness tolerance as the selection result.

[0035] Determining the numerical relationship between the maximum total pre-tightening force and the gravity corresponding to the vehicle weight is to compare the magnitudes of the two values. This is because when the maximum total pre-tightening force of the pre-tightening elastic unit is greater than the vehicle weight, the vehicle body will be lifted during the locking and unlocking processes, resulting in failed locking and unlocking. In this case, the selection of the pre-tightening elastic element is also unsuccessful.

[0036] Then, when the maximum total pre-tightening force is less than the gravity corresponding to the vehicle weight, it is possible to further analyze the fixing structure of the locking mechanism for the battery pack when using the corresponding number of pre-tightening elastic elements with a stiffness coefficient of k for the number of suspension points, and the flatness tolerance of the mating plane between the vehicle body end and the battery pack end is ε. The requirement for stability is to evaluate whether the battery pack can be unaffected by vibrations, impacts, etc. during vehicle driving. The finite element analysis method can be used to analyze from multiple dimensions affecting stability. When the stability of the locking mechanism fixed by the pre-tightening elastic unit to be selected and the battery pack meets the preset stability requirements, the calculated stiffness coefficient can be used as the stiffness coefficient of the pre-tightening elastic unit for the final selection, and the sum of the initial compression amount and the preset flatness tolerance can be used as the maximum compressible amount of the pre-tightening elastic element, thereby determining the selection result.

[0037] The selection result of the pre-tightening elastic unit determined through the above steps takes into account various problems existing in the pin-type locking mechanism (including the steel ball tensioning type), such as offsetting the flatness tolerance of the mating plane between the vehicle body end and the battery pack end, ensuring that the locking mechanisms of the same battery pack can be locked simultaneously, ensuring sufficient stiffness to prevent unlocking during driving caused by the vertical vibration of the battery pack, and also providing a certain amount of re-compressibility to ensure sufficient unlocking stroke of the locking mechanism and reduce the vibration noise caused by the vibration of the battery pack.

[0038] In the technical solution of this embodiment, first, the vehicle weight and the battery pack weight of the vehicle to which the pre-tightening elastic unit to be selected is applied are obtained, and based on the vehicle weight and the battery pack weight, the initial number of suspension points of the battery pack and the initial compression amount of the pre-tightening elastic unit to be selected are determined according to a preset strategy; then, based on the battery pack weight, the initial number of suspension points, and the initial compression amount, the stiffness coefficient of the pre-tightening elastic unit to be selected is determined, and based on the stiffness coefficient, the maximum total pre-tightening force of the pre-tightening elastic unit to be selected under a preset plane tolerance is determined; finally, the numerical relationship between the maximum total pre-tightening force and the gravity corresponding to the vehicle weight is determined. When the numerical relationship satisfies the preset relationship and the stability of the locking mechanism fixed by the pre-tightening elastic unit to be selected and the battery pack meets the preset stability requirement, the sum of the stiffness coefficient and the initial compression amount and the preset plane tolerance is used as the selection result. The technical solution of the embodiment of the present invention provides a complete selection process for the pre-tightening elastic element, taking into account various problems existing in the pin-type locking mechanism (including the steel ball tensioning type) during this process, enabling the selected elastic element to meet the usage requirements and improving the selection efficiency of the pre-tightening elastic element.

[0039] Embodiment Two

[0040] Figure 2 It is a flowchart of a method for selecting a pre-tightening elastic unit provided by Embodiment Two of the present invention. This embodiment and the method for selecting a pre-tightening elastic unit in the above embodiment belong to the same inventive concept, and further describe the process of adjusting parameters and finally determining the selection result of the pre-tightening elastic unit when the initial selection does not meet the requirements during the selection process. This method can be executed by a pre-tightening elastic unit selection device, which can be implemented in a software and / or hardware manner and integrated in a computer device with application development functions.

[0041] As Figure 2 shown, the method for selecting a pre-tightening elastic unit includes the following steps:

[0042] S210. Obtain the vehicle weight and the battery pack weight of the vehicle to which the pre-tightening elastic unit to be selected is applied, and based on the vehicle weight and the battery pack weight, determine the initial number of suspension points of the battery pack and the initial compression amount of the pre-tightening elastic unit to be selected according to a preset strategy.

[0043] S220. Determine the stiffness coefficient of the to-be-selected pre-tightening elastic unit based on the weight of the battery pack, the initial number of suspension points, and the initial compression amount, and determine the maximum total pre-tightening force of the to-be-selected pre-tightening elastic unit under a preset planar tolerance based on the stiffness coefficient.

[0044] Steps S210 - S220 can refer to the specific descriptions in the above embodiments and will not be elaborated in this embodiment.

[0045] S230. Determine whether the maximum total pre-tightening force is less than the gravity corresponding to the vehicle weight.

[0046] When the maximum total pre-tightening force is less than the gravity corresponding to the vehicle weight, step S240 is executed. Otherwise, step S260 is executed.

[0047] S240. Use the finite element analysis method to determine the stability of the locking between the battery pack and the locking mechanism based on the to-be-selected pre-tightening elastic unit, and determine whether the stability meets the preset stability requirements.

[0048] The requirement for stability is to evaluate whether the battery pack can be unaffected by vibrations, impacts, etc. during vehicle driving. The finite element analysis method can be used to analyze from multiple dimensions affecting stability. When the stability of the locking mechanism fixed with the to-be-selected pre-tightening elastic unit and the battery pack meets the preset stability requirements, step S250 is executed. Otherwise, S260 is executed, or measures such as adjusting the battery pack structure are taken to make the stability meet the preset stability requirements.

[0049] S250. Take the sum of the current compression amount and the preset planar tolerance value as the maximum compression amount of the to-be-selected pre-tightening elastic unit, and take the current stiffness coefficient as the stiffness coefficient of the to-be-selected pre-tightening elastic unit.

[0050] The current compression amount refers to the initial compression amount without parameter adjustment, or the compression amount after adjustment and update. The current stiffness coefficient refers to the stiffness coefficient determined without parameter adjustment, or the updated stiffness coefficient determined by parameters such as the adjusted number of suspension points and / or compression amount. That is, take the latest adjustment result as the final selection result.

[0051] S260. Adjust the value of the initial number of suspension points and / or the initial compression amount.

[0052] In this step, that is, adjust based on the initial values of the number of suspension points and / or the compression amount. Then continue to execute steps S220 - S250 based on the adjusted parameters to update (adjust) the stiffness coefficient of the to-be-selected pre-tightening elastic unit, and determine the maximum total pre-tightening force of the to-be-selected pre-tightening elastic unit based on the updated stiffness coefficient until the parameters of the elastic pre-tightening element that meet the conditions are determined.

[0053] When adjusting the parameters, it is possible to only adjust the number of suspension points, or only adjust the compression amount, or adjust both parameters simultaneously. In the technical solution of this embodiment, first, the vehicle weight and the battery pack weight of the vehicle applying the pre-tightening elastic unit to be selected are obtained, and based on the vehicle weight and the battery pack weight, the initial number of suspension points of the battery pack and the initial compression amount of the pre-tightening elastic unit to be selected are determined according to a preset strategy; then, based on the battery pack weight, the initial number of suspension points, and the initial compression amount, the stiffness coefficient of the pre-tightening elastic unit to be selected is determined, and based on the stiffness coefficient, the maximum total pre-tightening force of the pre-tightening elastic unit to be selected under a preset plane tolerance is determined; finally, the numerical relationship between the maximum total pre-tightening force and the gravity corresponding to the vehicle weight is determined. When the numerical relationship does not meet the preset relationship, the number of suspension points is adjusted until the numerical relationship between the maximum total pre-tightening force and the gravity corresponding to the vehicle weight meets the preset relationship, and further, it is determined whether the stability of the locking mechanism using the pre-tightening elastic unit to be fixed and the battery pack meets the preset stability requirement. If it meets, the selection result of the pre-tightening elastic element is obtained; otherwise, by adjusting the number of suspension points or the battery pack structure, etc., the stability requirement is achieved to determine the final selection result of the pre-tightening elastic element. The technical solution of the embodiment of the present invention provides a complete selection process for the pre-tightening elastic element. In this process, various problems existing in the pin-type locking mechanism (including the steel ball tensioning type) are taken into account, so that the selected elastic element can meet the use requirements and improve the selection efficiency of the pre-tightening elastic element.

[0054] The following is an embodiment of the pre-tightening elastic unit selection device provided by the embodiment of the present invention. This device and the pre-tightening elastic unit selection method of the above embodiments belong to the same inventive concept and can implement the pre-tightening elastic unit selection methods of the above embodiments. For the details not described in detail in the embodiment of the pre-tightening elastic unit selection device, reference can be made to the embodiments of the pre-tightening elastic unit selection method above.

[0055] Embodiment III

[0056] Figure 3 FIG. 12 is a structural schematic diagram of the pre-tightening elastic unit selection device provided by Embodiment III of the present invention. This embodiment is applicable to the selection process of the pre-tightening elastic element of the locking mechanism of the battery pack of an electric vehicle. This device can be implemented in software and / or hardware and integrated in a computer device with application development functions.

[0057] As Figure 3 shown, the pre-tightening elastic unit selection device includes: an initial parameter determination module 310, a pre-tightening force calculation module 320, and a selection determination module 330.

[0058] Among them, the initial parameter determination module 310 is configured to obtain the vehicle weight and the battery pack weight of the vehicle to which the pre-tightening elastic unit to be selected is applied, and determine the initial number of suspension points of the battery pack and the initial compression amount of the pre-tightening elastic unit to be selected according to a preset strategy based on the vehicle weight and the battery pack weight; the pre-tightening force calculation module 320 is configured to determine the stiffness coefficient of the pre-tightening elastic unit to be selected based on the battery pack weight, the initial number of suspension points, and the initial compression amount, and determine the maximum total pre-tightening force of the pre-tightening elastic unit to be selected under a preset plane tolerance based on the stiffness coefficient; the selection determination module 330 is configured to determine the numerical relationship between the maximum total pre-tightening force and the gravity corresponding to the vehicle weight. When the numerical relationship satisfies a preset relationship, and the stability of the locking mechanism fixed by the pre-tightening elastic unit to be selected and the battery pack meets the preset stability requirement, the sum of the stiffness coefficient, the initial compression amount, and the preset plane tolerance is used as the selection result.

[0059] The technical solution of this embodiment first obtains the vehicle weight and the battery pack weight of the vehicle to which the pre-tightening elastic unit to be selected is applied, and determines the initial number of suspension points of the battery pack and the initial compression amount of the pre-tightening elastic unit to be selected according to a preset strategy based on the vehicle weight and the battery pack weight; then determines the stiffness coefficient of the pre-tightening elastic unit to be selected based on the battery pack weight, the initial number of suspension points, and the initial compression amount, and determines the maximum total pre-tightening force of the pre-tightening elastic unit to be selected under a preset plane tolerance based on the stiffness coefficient; finally, determines the numerical relationship between the maximum total pre-tightening force and the gravity corresponding to the vehicle weight. When the numerical relationship satisfies a preset relationship, and the stability of the locking mechanism fixed by the pre-tightening elastic unit to be selected and the battery pack meets the preset stability requirement, the sum of the stiffness coefficient, the initial compression amount, and the preset plane tolerance is used as the selection result. The technical solution of the embodiment of the present invention provides a complete pre-tightening elastic element selection process, taking into account various problems existing in pin-type locking mechanisms (including steel ball tensioning type) during this process, enabling the selected elastic element to meet the use requirements and improving the selection efficiency of the pre-tightening elastic element.

[0060] Optionally, the initial parameter determination module 310 is specifically configured to:

[0061] Determine the number of the pre-tightening elastic units to be selected required according to the battery pack weight and the preset load-bearing value of a single pre-tightening elastic unit to be selected, and use it as the initial number of suspension points.

[0062] Optionally, the pre-tightening force calculation module 320 is specifically configured to:

[0063] Determine the total pre-tightening force according to the maximum acceleration value during the operation of the vehicle and the battery pack weight;

[0064] Determine the pre-tightening force of a single pre-tightening elastic unit to be selected according to the number of the initial suspension points and the total pre-tightening force;

[0065] Determine the stiffness coefficient of the pre-tightening elastic unit to be selected based on the pre-tightening force of a single pre-tightening elastic unit to be selected and the initial compression amount.

[0066] Optionally, the pre-tightening force calculation module 320 can also be used for:

[0067] Based on the stiffness coefficient, calculate the total pre-tightening force when only one of the pre-tightening elastic units in the pre-tightening elastic units with the number of the initial suspension points has a compression amount reduced by a preset planar tolerance value and the compression amounts of the other pre-tightening elastic units are all increased by the preset planar tolerance value as the maximum pre-tightening force.

[0068] Optionally, the selection determination module 330 is specifically used for:

[0069] Compare the numerical values of the maximum total pre-tightening force and the gravity corresponding to the vehicle weight. When the maximum total pre-tightening force is less than the gravity corresponding to the vehicle weight, use the finite element analysis method to determine the locking stability between the battery pack and the locking mechanism based on the pre-tightening elastic unit to be selected;

[0070] When the stability meets the preset conditions, use the sum of the initial compression amount and the preset planar tolerance value as the maximum compression amount of the pre-tightening elastic unit to be selected, and use the stiffness coefficient as the stiffness coefficient of the pre-tightening elastic unit to be selected.

[0071] Optionally, the selection determination module 330 is also used for:

[0072] Adjust the numerical values of the number of the initial suspension points and / or the initial compression amount, and update the stiffness coefficient of the pre-tightening elastic unit to be selected based on the adjusted number of suspension points and / or compression amount;

[0073] Determine the maximum total pre-tightening force of the pre-tightening elastic unit to be selected based on the updated stiffness coefficient until the maximum total pre-tightening force is less than the gravity corresponding to the vehicle weight;

[0074] Use the finite element analysis method to determine the locking stability between the battery pack and the locking mechanism based on the pre-tightening elastic unit to be selected;

[0075] When the stability meets the preset conditions, use the sum of the adjusted initial compression amount and the preset planar tolerance value as the maximum compression amount of the pre-tightening elastic unit to be selected, and use the updated stiffness coefficient as the stiffness coefficient of the pre-tightening elastic unit to be selected.

[0076] Optionally, the selection determination module 330 is also used for:

[0077] Adjust the values of the initial number of suspension points and / or the initial compression amount, and update the stiffness coefficient of the pre-tightening elastic unit to be selected based on the adjusted number of suspension points and / or compression amount;

[0078] Determine the maximum total pre-tightening force of the pre-tightening elastic unit to be selected based on the updated stiffness coefficient until the maximum total pre-tightening force is less than the gravity corresponding to the vehicle weight, and the stability of the locking between the battery pack and the locking mechanism based on the pre-tightening elastic unit to be selected meets the preset conditions;

[0079] Take the sum of the adjusted initial compression amount and the preset plane tolerance value as the maximum compression amount of the pre-tightening elastic unit to be selected, and take the updated stiffness coefficient as the stiffness coefficient of the pre-tightening elastic unit to be selected.

[0080] The pre-tightening elastic unit selection device provided by the embodiments of the present invention can execute the pre-tightening elastic unit selection method provided by any embodiment of the present invention, and has the corresponding functional modules and beneficial effects for executing the method.

[0081] Embodiment 4

[0082] Figure 4 It is a schematic structural diagram of a computer device provided for Embodiment 4 of the present invention. Figure 4 The block diagram of an exemplary computer device 12 suitable for implementing the embodiments of the present invention is shown. Figure 4 The displayed computer device 12 is only an example and should not bring any limitation to the functions and usage scope of the embodiments of the present invention. The computer device 12 can be any terminal device with computing capabilities, such as intelligent controllers, servers, mobile phones and other terminal devices.

[0083] As Figure 4 shown, the computer device 12 is presented in the form of a general-purpose computing device. The components of the computer device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 connecting different system components (including the system memory 28 and the processing unit 16).

[0084] The bus 18 represents one or more of several types of bus structures, including a memory bus or a memory controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus using any bus structure in a variety of bus structures. For example, these architectures include, but are not limited to, Industry Standard Architecture (ISA) bus, Micro Channel Architecture (MAC) bus, Enhanced ISA bus, Video Electronics Standards Association (VESA) local bus, and Peripheral Component Interconnect (PCI) bus.

[0085] Computer device 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by computer device 12, including volatile and non-volatile media, removable and non-removable media.

[0086] System memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. Computer device 12 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, storage system 34 can be used for reading and writing on non-removable, non-volatile magnetic media ( Figure 4 not shown, typically referred to as a "hard disk drive"). Although Figure 4 not shown in the figure, a disk drive for reading and writing on removable non-volatile disks (such as a "floppy disk"), and an optical disk drive for reading and writing on removable non-volatile optical disks (such as CD-ROM, DVD-ROM or other optical media) can be provided. In these cases, each drive can be connected to bus 18 through one or more data media interfaces. System memory 28 may include at least one program product having a set (such as at least one) of program modules configured to perform the functions of the embodiments of the present invention.

[0087] A program / utility 40 having a set (at least one) of program modules 42 can be stored, for example, in system memory 28. Such program modules 42 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data. Each or some combination of these examples may include an implementation of a network environment. Program modules 42 generally execute the functions and / or methods in the embodiments described in the present invention.

[0088] Computer device 12 can also communicate with one or more external devices 14 (such as a keyboard, a pointing device, a display 24, etc.), and can also communicate with one or more devices that enable a user to interact with the computer device 12, and / or communicate with any device that enables the computer device 12 to communicate with one or more other computing devices (such as a network card, a modem, etc.). Such communication can be carried out through an input / output (I / O) interface 22. Moreover, computer device 12 can also communicate with one or more networks (such as a local area network (LAN), a wide area network (WAN) and / or a public network, such as the Internet) through a network adapter 20. As shown in the figure, network adapter 20 communicates with other modules of computer device 12 through bus 18. It should be understood that although Figure 4which is not shown in the figure, other hardware and / or software modules can be used in combination with the computer device 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, etc.

[0089] The processing unit 16 executes various functional applications and data processing by running the programs stored in the system memory 28. For example, the pre-tightening elastic unit selection method provided by the present embodiment is implemented. The method includes:

[0090] Obtain the vehicle weight and the battery pack weight of the vehicle to which the pre-tightening elastic unit to be selected is applied, and based on the vehicle weight and the battery pack weight, determine the initial number of suspension points of the battery pack and the initial compression amount of the pre-tightening elastic unit to be selected according to a preset strategy;

[0091] Determine the stiffness coefficient of the pre-tightening elastic unit to be selected based on the battery pack weight, the initial number of suspension points, and the initial compression amount, and based on the stiffness coefficient, determine the maximum total pre-tightening force of the pre-tightening elastic unit to be selected under a preset plane tolerance;

[0092] Determine the numerical relationship between the maximum total pre-tightening force and the gravity corresponding to the vehicle weight. When the numerical relationship satisfies a preset relationship and the stability of the locking mechanism using the pre-tightening elastic unit to be selected and the battery pack meets the preset stability requirements, use the sum of the stiffness coefficient, the initial compression amount, and the preset plane tolerance as the selection result.

[0093] Embodiment Five

[0094] Embodiment Five of the present invention provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, the pre-tightening elastic unit selection method provided by any embodiment of the present invention is implemented, including:

[0095] Obtain the vehicle weight and the battery pack weight of the vehicle to which the pre-tightening elastic unit to be selected is applied, and based on the vehicle weight and the battery pack weight, determine the initial number of suspension points of the battery pack and the initial compression amount of the pre-tightening elastic unit to be selected according to a preset strategy;

[0096] Determine the stiffness coefficient of the pre-tightening elastic unit to be selected based on the battery pack weight, the initial number of suspension points, and the initial compression amount, and based on the stiffness coefficient, determine the maximum total pre-tightening force of the pre-tightening elastic unit to be selected under a preset plane tolerance;

[0097] Determine the numerical relationship between the maximum total pre-tightening force and the gravity corresponding to the vehicle weight. When the numerical relationship satisfies a preset relationship, and the stability of the locking mechanism fixed by the to-be-selected pre-tightening elastic unit and the battery pack meets the preset stability requirement, use the sum of the stiffness coefficient and the initial compression amount and the preset plane tolerance as the selection result.

[0098] The computer storage medium of the embodiments of the present invention may adopt any combination of one or more computer-readable media. The computer-readable media may be computer-readable signal media or computer-readable storage media. The computer-readable storage media may be, for example, but not limited to: electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or components, or any combination of the above. More specific examples (non-exhaustive list) of the computer-readable storage media include: electrical connections with one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above. In this document, the computer-readable storage media may be any tangible medium that contains or stores a program, and this program can be used by or in combination with an instruction execution system, device, or component.

[0099] The computer-readable signal media may include data signals propagated in a baseband or as part of a carrier wave, which carry computer-readable program codes. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. The computer-readable signal media may also be any computer-readable media other than the computer-readable storage media, and this computer-readable media can send, propagate, or transmit a program for use by or in combination with an instruction execution system, device, or component.

[0100] The program codes contained on the computer-readable media can be transmitted by any suitable media, including but not limited to: wireless, wire, optical cable, RF, etc., or any suitable combination of the above.

[0101] Computer program code for performing the operations of the present invention may be written in one or more programming languages or combinations thereof, including object-oriented programming languages such as Java, Smalltalk, C++, and also including conventional procedural programming languages such as the "C" language or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, executed as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0102] Those of ordinary skill in the art should understand that the above-mentioned modules or steps of the present invention can be implemented by a general-purpose computing device. They can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Optionally, they can be implemented with program code executable by a computer device, so that they can be stored in a storage device and executed by the computing device, or they can be made into individual integrated circuit modules respectively, or multiple modules or steps among them can be made into a single integrated circuit module to implement. Thus, the present invention is not limited to any specific combination of hardware and software.

[0103] Note that the above is only the preferred embodiment of the present invention and the applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein. Various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for selecting a pre-tightening elastic unit, characterized in that, The method includes: Obtaining the vehicle weight and the battery pack weight of a vehicle to which a pre-tightening elastic unit to be selected is applied, and determining the initial number of suspension points of the battery pack and the initial compression amount of the pre-tightening elastic unit to be selected according to a preset strategy based on the vehicle weight and the battery pack weight; Determining the stiffness coefficient of the pre-tightening elastic unit to be selected based on the battery pack weight, the initial number of suspension points, and the initial compression amount, and determining the maximum total pre-tightening force of the pre-tightening elastic unit to be selected under a preset plane tolerance based on the stiffness coefficient; Determining the numerical relationship between the maximum total pre-tightening force and the gravity corresponding to the vehicle weight, when the numerical relationship satisfies a preset relationship and the stability of the locking mechanism fixed by the pre-tightening elastic unit to be selected and the battery pack meets the preset stability requirement, taking the sum of the stiffness coefficient, the initial compression amount, and the preset plane tolerance as the selection result; Determining the initial number of suspension points of the battery pack according to a preset strategy, including: Determining the number of the pre-tightening elastic units to be selected required according to the battery pack weight and the preset load-bearing value of a single pre-tightening elastic unit to be selected as the initial number of suspension points; The determining the stiffness coefficient of the pre-tightening elastic unit to be selected based on the battery pack weight, the initial number of suspension points, and the initial compression amount includes: Determining the total pre-tightening force according to the maximum acceleration value during the operation of the vehicle and the battery pack weight; Determining the pre-tightening force of a single pre-tightening elastic unit to be selected according to the initial number of suspension points and the total pre-tightening force; Determining the stiffness coefficient of the pre-tightening elastic unit to be selected based on the pre-tightening force of a single pre-tightening elastic unit to be selected and the initial compression amount; The determining the maximum total pre-tightening force of the pre-tightening elastic unit to be selected based on the stiffness coefficient includes: Calculating, based on the stiffness coefficient, the total pre-tightening force when the compression amount of only one of the pre-tightening elastic units among the pre-tightening elastic units with the initial number of suspension points is reduced by the preset plane tolerance value and the compression amounts of the other pre-tightening elastic units are increased by the preset plane tolerance value as the maximum total pre-tightening force; Determining the numerical relationship between the maximum total pre-tightening force and the gravity corresponding to the vehicle weight, when the numerical relationship satisfies a preset relationship and the stability of the locking mechanism fixed by the pre-tightening elastic unit to be selected and the battery pack meets the preset stability requirement, taking the sum of the stiffness coefficient, the initial compression amount, and the preset plane tolerance as the selection result, includes: Comparing the numerical magnitudes of the maximum total pre-tightening force and the gravity corresponding to the vehicle weight, when the maximum total pre-tightening force is less than the gravity corresponding to the vehicle weight, using the finite element analysis method to determine the stability of the locking between the battery pack and the locking mechanism based on the pre-tightening elastic unit to be selected; When the stability meets the preset conditions, taking the sum of the initial compression amount and the preset plane tolerance value as the maximum compression amount of the pre-tightening elastic unit to be selected, and taking the stiffness coefficient as the stiffness coefficient of the pre-tightening elastic unit to be selected.

2. The method according to claim 1, characterized in that, When the maximum total pre-tightening force is greater than the gravity corresponding to the vehicle weight, the method further includes: Adjust the values of the initial number of suspension points and / or the initial compression amount, and update the stiffness coefficient of the pre-tightening elastic unit to be selected based on the adjusted number of suspension points and / or compression amount; Determine the maximum total pre-tightening force of the pre-tightening elastic unit to be selected based on the updated stiffness coefficient until the maximum total pre-tightening force is less than the gravity corresponding to the vehicle weight; Use the finite element analysis method to determine the stability of the locking between the battery pack and the locking mechanism based on the pre-tightening elastic unit to be selected; When the stability meets the preset conditions, use the sum of the adjusted initial compression amount and the preset plane tolerance value as the maximum compression amount of the pre-tightening elastic unit to be selected, and use the updated stiffness coefficient as the stiffness coefficient of the pre-tightening elastic unit to be selected.

3. The method according to claim 1 or 2, characterized in that, When the stability does not meet the preset conditions, the method further includes: Determine the maximum total pre-tightening force of the pre-tightening elastic unit to be selected based on the updated stiffness coefficient until the maximum total pre-tightening force is less than the gravity corresponding to the vehicle weight and the stability of the locking between the battery pack and the locking mechanism based on the pre-tightening elastic unit to be selected meets the preset conditions; Use the sum of the adjusted initial compression amount and the preset plane tolerance value as the maximum compression amount of the pre-tightening elastic unit to be selected, and use the updated stiffness coefficient as the stiffness coefficient of the pre-tightening elastic unit to be selected.

4. A pre-tightening elastic unit selection device, characterized in that The device includes: An initial parameter determination module, configured to obtain the vehicle weight and the battery pack weight of a vehicle applying a pre-tightening elastic unit to be selected, and determine the initial number of suspension points of the battery pack and the initial compression amount of the pre-tightening elastic unit to be selected according to a preset strategy based on the vehicle weight and the battery pack weight; A pre-tightening force calculation module, configured to determine the stiffness coefficient of the pre-tightening elastic unit to be selected based on the battery pack weight, the initial number of suspension points, and the initial compression amount, and determine the maximum total pre-tightening force of the pre-tightening elastic unit to be selected under a preset plane tolerance based on the stiffness coefficient; A selection determination module, configured to determine the numerical relationship between the maximum total pre-tightening force and the gravity corresponding to the vehicle weight. When the numerical relationship meets the preset relationship and the stability of the locking mechanism fixed by the pre-tightening elastic unit to be selected and the battery pack meets the preset stability requirement, use the stiffness coefficient and the sum of the initial compression amount and the preset plane tolerance as the selection result; Determining the initial number of suspension points of the battery pack according to a preset strategy includes: Determine the number of the pre-tightening elastic units to be selected required according to the battery pack weight and the preset load-bearing value of a single pre-tightening elastic unit to be selected as the initial number of suspension points; Determining the stiffness coefficient of the pre-tightening elastic unit to be selected based on the battery pack weight, the initial number of suspension points, and the initial compression amount includes: Determine the total pre-tightening force according to the maximum acceleration value during the operation of the vehicle and the battery pack weight; Determine the pre-tightening force of a single pre-tightening elastic unit to be selected according to the initial number of suspension points and the total pre-tightening force; Determine the stiffness coefficient of the pre-tightening elastic unit to be selected based on the pre-tightening force of a single pre-tightening elastic unit to be selected and the initial compression amount; Determining the maximum total pre-tightening force of the pre-tightening elastic unit to be selected based on the stiffness coefficient includes: Based on the stiffness coefficient, calculate the total pre-tightening force when the compression amount of only one of the pre-tightening elastic units in the pre-tightening elastic units with the initial number of suspension points decreases by a preset plane tolerance value, and the compression amounts of the other pre-tightening elastic units increase by the preset plane tolerance value, and use this as the maximum total pre-tightening force; Determine the numerical relationship between the maximum total pre-tightening force and the gravity corresponding to the vehicle weight. When the numerical relationship satisfies a preset relationship and the stability of the locking mechanism fixed by the pre-tightening elastic unit to be selected and the battery pack meets the preset stability requirement, use the stiffness coefficient and the sum of the initial compression amount and the preset plane tolerance as the selection result, including: Compare the numerical magnitudes of the maximum total pre-tightening force and the gravity corresponding to the vehicle weight. When the maximum total pre-tightening force is less than the gravity corresponding to the vehicle weight, use the finite element analysis method to determine the stability of the locking between the battery pack and the locking mechanism based on the pre-tightening elastic unit to be selected; When the stability meets the preset conditions, use the sum of the initial compression amount and the preset plane tolerance value as the maximum compression amount of the pre-tightening elastic unit to be selected, and use the stiffness coefficient as the stiffness coefficient of the pre-tightening elastic unit to be selected.

5. A computer device, characterized in that, The computer device includes: One or more processors; A memory for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the pre-tightening elastic unit selection method according to any one of claims 1-3.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the pre-tightening elastic unit selection method according to any one of claims 1-3.

Images