A design method and system of an oil-to-electric vehicle type three-electricity arrangement

Abstract

The application discloses a design method of three-electricity arrangement of an oil-to-electricity vehicle, which comprises the following steps: grading the electric safety of a three-electricity system according to the performance requirements of parts of the three-electricity system; performing collision simulation experiments under different collision conditions according to the expected overall vehicle mass of the oil-to-electricity vehicle, the electric safety grading of the three-electricity system and a project design boundary, so as to obtain a collision electric safety area of the vehicle body of the oil-to-electricity vehicle; and arranging the parts of the corresponding three-electricity system in each collision electric safety area of the vehicle body of the oil-to-electricity vehicle, so as to obtain the three-electricity arrangement of the oil-to-electricity vehicle. The application can quickly arrange the three-electricity system and design the vehicle body structure from the perspective of collision electric safety, quickly identify whether the cost and cycle changes caused by the oil-to-electricity can meet the project requirements, effectively reduce the deformation and damage of the three-electricity system after a collision in actual traffic accidents, and greatly reduce the harm caused by the electric safety of the electric vehicle after a collision.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of three-electric system arrangement, and particularly relates to a design method and system for three-electric arrangement of an oil-to-electric vehicle. BACKGROUND

[0002] In order to save energy and reduce emissions, electric vehicles have gradually begun to be adopted by the market. Compared with fuel vehicles, electric vehicles increase a three-electric system. The three-electric system is required to be electrically safe after collision in collision regulations, but since the collision regulations working conditions currently only stipulate front, side and rear collisions, the positions, speeds and other parameters of the three-electric system in actual collision traffic accidents are different, and the protection of the three-electric system in actual collision traffic accidents cannot effectively guarantee the electric safety, so the three-electric system cannot completely play a reliable protection role for the vehicle occupants, pedestrians and rescue personnel.

[0003] At present, the oil-to-electric vehicle in the industry is basically arranged with related three-electric systems according to requirements. For example, according to the endurance target requirement, a battery pack is added, which is basically rectangular. After arrangement, the related floor area is modified, and then according to the related simulation results, the vehicle body structure is optimized. The disadvantage of this arrangement method is that in the early stage of the project, the three-electric system (such as the battery pack) cannot be optimally arranged according to the existing vehicle body structure, which will lead to repeated work of professional intersection in the subsequent stage, affecting the project period; at the same time, it is also impossible to accurately judge the amount of change of the vehicle body structure, thereby leading to an increase in project cost, a delay in decision-making, and an impact on project progress. SUMMARY

[0004] In order to solve the above problems, the application establishes a three-electric system grading method according to the electric safety performance in collision, an oil-to-electric vehicle collision electric safety region grading method according to the electric safety performance in collision, and a design method for arranging the three-electric system in combination with the above two grading methods.

[0005] The design method for arranging the three-electric system of the oil-to-electric vehicle for achieving one of the purposes of the application comprises the following steps:

[0006] S1, classifying the electric safety of the three-electric system according to the part performance requirements and the project design boundary of the three-electric system;

[0007] The part performance requirements include part displacement requirements, part deformation requirements, and part speed / acceleration requirements.

[0008] The three-electric system parts include REESS power battery pack (vehicle-mounted rechargeable energy storage system), OBC (vehicle-mounted charging device), DCDC (voltage converter), BMS (battery management system), electric motor, electric motor interface, high-voltage line and charging interface.

[0009] Further, the method for classifying the electrical safety of the three-electric system according to the performance requirements of the parts of the three-electric system comprises:

[0010] Obtaining the performance requirements of the parts of the three-electric system, the performance requirements of the parts comprising part displacement requirements, part deformation requirements, part speed / acceleration requirements;

[0011] Classifying the electrical safety of the three-electric system according to the performance requirements of the parts and the national standards and the internal electrical safety requirements of the enterprise.

[0012] Further, the electrical safety classification of the three-electric system comprises three-level safety requirements, wherein the I-level safety requirements comprise the limitations of the following parameters: strain, maximum deformation, acceleration peak value, and intrusion speed peak value; the II-level safety requirements comprise the limitations of the following parameters: strain and maximum deformation; and the III-level safety requirements comprise the limitation of the following parameter: strain.

[0013] Further, the electrical safety classification of the three-electric system comprises three-level safety requirements, wherein the I-level safety requirements correspond to the following parts: the vehicle-mounted rechargeable energy storage system, the vehicle-mounted charging device, the voltage converter, and the interface of the high-voltage system; the II-level safety requirements correspond to the following parts: the battery management system and the high-voltage line; and the III-level safety requirements correspond to the following parts: the motor and the charging interface.

[0014] S2. According to the predicted vehicle mass of the oil-to-electric vehicle, the electrical safety classification of the three-electric system, and the project design boundary, performing a collision simulation experiment under different collision conditions to obtain a collision electrical safety region of the vehicle body of the oil-to-electric vehicle;

[0015] Further, the method for obtaining the collision electrical safety region of the vehicle body of the oil-to-electric vehicle comprises:

[0016] S201. Obtaining the predicted vehicle mass of the oil-to-electric vehicle, setting the vehicle mass of the original prototype fuel vehicle to the predicted vehicle mass in the simulation software, and performing simulation under different collision conditions for the original prototype fuel vehicle with the modified vehicle mass to obtain multiple collision parameters of the vehicle body of the oil-to-electric vehicle under different collision conditions, the collision parameters comprising strain, deformation, acceleration, and intrusion speed parameters;

[0017] S202. According to the electrical safety classification of the three-electric system and the multiple collision parameters of the vehicle body of the oil-to-electric vehicle under different collision conditions obtained in the above step, dividing the vehicle body of the oil-to-electric vehicle into multiple collision electrical safety regions corresponding one-to-one to the electrical safety classification of the three-electric system;

[0018] The division method comprises:

[0019] According to the collision parameters of the body of the oil-to-electricity vehicle obtained in the above steps, and the parameter limitation in the electric safety classification of the three-electricity system, a one-to-one correspondence between the body region and the electric safety classification of the three-electricity system is established; the body region corresponding to the same electric safety classification of the three-electricity system is divided into the same collision electric safety region.

[0020] Further, the method for obtaining the collision electric safety region of the body of the oil-to-electricity vehicle can further include:

[0021] S2001, simulation of the original fuel vehicle under different collision conditions to obtain a plurality of collision parameter sets U1 of the body of the original fuel vehicle under different collision conditions; the collision parameters include strain, deformation, acceleration and intrusion speed parameters;

[0022] The collision parameter set contains a plurality of collision parameters under each collision condition; the collision parameters are used to obtain the collision region of the body; the collision parameter set is used to obtain the body collision region under each collision condition; the body collision region is used to divide the body into a plurality of collision electric safety regions in the subsequent steps;

[0023] S2002, modifying the vehicle mass of the original fuel vehicle in the simulation software according to the project design boundary, and simulating the original fuel vehicle under different collision conditions to obtain one or more collision parameter sets U2 of the original fuel vehicle under different collision conditions under the set vehicle mass;

[0024] S2003, obtaining the expected vehicle mass of the oil-to-electricity vehicle, and obtaining the collision parameter set U of the body of the oil-to-electricity vehicle under different collision conditions by linear interpolation method according to the collision parameter set U1 of the body of the original fuel vehicle under different collision conditions obtained in the above steps, and the collision parameter set U2 of the original fuel vehicle under different collision conditions under the set vehicle mass;

[0025] S2004, dividing the body of the oil-to-electricity vehicle into a plurality of collision electric safety regions corresponding one-to-one to the electric safety classification of the three-electricity system according to the electric safety classification of the three-electricity system and the collision parameter set U of the body of the oil-to-electricity vehicle under different collision conditions obtained in the above steps.

[0026] S3, arranging the corresponding components of the three-electricity system in each collision electric safety region according to the plurality of collision electric safety regions of the oil-to-electricity vehicle obtained in the above steps and the project design boundary, to obtain the three-electricity arrangement of the oil-to-electricity vehicle.

[0027] A system for three-electricity arrangement of an oil-to-electricity vehicle for realizing the second purpose of the application, comprising a three-electricity system electric safety classification module, a collision electric safety region division module and a three-electricity system component arrangement module;

[0028] The three-electric system electric safety grading module is used for grading the electric safety of the three-electric system according to the performance requirements of the parts of the three-electric system;

[0029] The collision electric safety region division module is used for performing collision simulation experiments under different collision conditions according to the predicted overall vehicle mass of the oil-to-electric vehicle, the three-electric system electric safety grading, and the project design boundary, to obtain the collision electric safety regions of the vehicle body of the oil-to-electric vehicle.

[0030] The three-electric system part arrangement module is used for arranging the parts of the three-electric system in each collision electric safety region according to the collision electric safety regions of the oil-to-electric vehicle obtained by the collision electric safety region division module, to obtain the three-electric arrangement of the oil-to-electric vehicle.

[0031] Further, the collision electric safety region division module further comprises a first simulation module, which is used for setting the overall vehicle mass of the prototype fuel vehicle as the predicted overall vehicle mass in the simulation software according to the obtained predicted overall vehicle mass of the oil-to-electric vehicle, and performing simulation under different collision conditions on the prototype fuel vehicle with the modified overall vehicle mass, to obtain a plurality of collision parameters of the vehicle body of the oil-to-electric vehicle under different collision conditions.

[0032] Further, the collision electric safety region division module further comprises a second simulation module and a third simulation module.

[0033] The second simulation module is used for performing simulation under different collision conditions on the prototype fuel vehicle, to obtain a collision parameter set U1 of the vehicle body of the prototype fuel vehicle under different collision conditions.

[0034] The third simulation module is used for modifying the overall vehicle mass of the prototype fuel vehicle in the simulation software according to the project design boundary, and performing simulation under different collision conditions on the prototype fuel vehicle, to obtain a collision parameter set U2 of the prototype fuel vehicle under different collision conditions under one or more set overall vehicle masses.

[0035] Still further, the collision electric safety region division module further comprises an oil-to-electric vehicle collision parameter acquisition module.

[0036] The oil-to-electric vehicle collision parameter acquisition module is used for obtaining a collision parameter set U of the vehicle body of the oil-to-electric vehicle under different collision conditions by linear interpolation according to the obtained predicted overall vehicle mass of the oil-to-electric vehicle, the collision parameter set U1 of the vehicle body of the prototype fuel vehicle under different collision conditions obtained by the second simulation module, and the collision parameter set U2 of the prototype fuel vehicle under different collision conditions under one or more set overall vehicle masses obtained by the third simulation module.

[0037] By using the system and method, the three-electric system can be arranged and the vehicle body structure can be designed from the perspective of collision electric safety, and whether the cost and period changes caused by oil-to-electricity meet the project requirements can be quickly identified; meanwhile, in actual traffic accidents, the deformation and damage of the three-electric system after the collision can be effectively reduced, and the harm of electric safety after the collision of the electric vehicle can be greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is a schematic diagram of the method of the present application;

[0039] Figure 2 is a schematic diagram of electric safety classification of the three-electric system;

[0040] Figure 3 is a schematic diagram of collision electric safety region classification of the prototype fuel vehicle;

[0041] Figure 4 is a schematic diagram of collision electric safety region classification of the oil-to-electricity vehicle;

[0042] Figure 5 is a schematic diagram of arrangement and analysis of the three-electric system;

[0043] Figure 6 is a collision simulation diagram corresponding to the prototype fuel vehicle in the embodiment;

[0044] Figure 7 is collision electric safety region classification corresponding to the prototype fuel vehicle in the embodiment;

[0045] Figure 8 is a collision simulation of project target one in the embodiment Figure 1 ;

[0046] Figure 9 is a collision simulation corresponding to project target one in the embodiment Figure 2 ;

[0047] Figure 10 is collision electric safety region classification corresponding to project target one in the embodiment;

[0048] Figure 11 is collision electric safety region classification corresponding to project target two in the embodiment;

[0049] Figure 12 is a schematic diagram of safety performance requirement classification in the collision region in the embodiment. DETAILED DESCRIPTION

[0050] The following specific embodiments are used to explain the technical solutions of the claims of the present application, so that those skilled in the art can understand the claims. The protection scope of the present application is not limited to the following specific embodiments. Those skilled in the art who make the technical solutions of the claims of the present application different from the following specific embodiments are also within the protection scope of the present application.

[0051] The following describes an embodiment of the method of the present application in combination with project examples. The following two optional project goals are set at the beginning of the project, and the reasonable arrangement scheme of the three-electric system is obtained by using the method of the present application.

[0052] Project goal 1: The oil-to-electricity project needs to meet the BEV pure electricity and the endurance requirement of 300+km on a fuel vehicle;

[0053] Project goal 2: The oil-to-electricity project needs to meet the PHEV plug-in hybrid endurance requirement of 55-70km (two-wheel drive, four-wheel drive) on a fuel vehicle;

[0054] S1, as shown in the figure, the three-electric system electrical safety is classified according to the performance requirements of the three-electric system parts and the industry and enterprise internal electrical safety requirements; the performance requirements of the parts are shown in Table 1; Figure 2

[0055] Table 1

[0056] The industry and enterprise internal requirements are as follows:

[0057] According to GB / T 31498-2021 and enterprise internal electrical safety requirements, the requirements of the three-electric system after collision include:

[0058] The power high-voltage system of REESS and the high-voltage components connected by the power high-voltage system shall meet the protection requirements against electric shock (low voltage, low power, physical protection, insulation resistance) at the same time;

[0059] Each high-voltage bus meets the protection requirements against electric shock (low voltage, low power, physical protection, insulation resistance), and the regulation requires at least one of the four provisions, and the enterprise standard requires all to meet;

[0060] Electrolyte leakage requirements;

[0061] REESS movement requirements and special safety requirements;

[0062] Enterprise standard other requirements: no temperature change in the battery cell of REESS, no spark generation in collision, no deformation of the shell of REESS, OBC and DCDC, and no separation from the fixing device.

[0063] ​

[0064] Based on the above component requirements and industry and enterprise internal electrical safety requirements, the classification table of electrical safety for the three-electric system is shown in Table 2 below:

[0065]

[0066] Table 2

[0067] Specifically: Level I safety requirements: strain ≤1%; maximum deformation ≤5mm; peak acceleration ≤50g (G1); peak intrusion velocity ≤5m / s (V1);

[0068] The components of the three-electric system corresponding to Level I safety requirements are: REESS power battery pack (on-board rechargeable energy storage system), OBC (on-board charger), DC-DC (voltage converter), and high-voltage system interfaces (such as motor interfaces).

[0069] Level II safety requirements: strain 1%–3%; maximum deformation ≤10mm;

[0070] The components of the three-electric system corresponding to Level II safety requirements are: BMS (Battery Management System), high-voltage line, and motor interface.

[0071] Level III safety requirement: Strain ≤ 5%;

[0072] The components of the three-electric system corresponding to Level III safety requirements are: motor and charging interface;

[0073] S2. Based on the expected vehicle weight of the converted electric vehicle, the electrical safety classification of the three-electric system, and the project design boundaries, conduct collision simulation experiments under different collision conditions to obtain the collision electrical safety zone of the vehicle body.

[0074] like Figure 3 The steps shown involve conducting relevant crash simulations on the prototype vehicle based on project boundaries. (By compiling global crash safety standards, more stringent and comprehensive crash standard requirements for electric vehicles have been added. The overall vehicle crash conditions for the project are determined as shown in Table 3 below: 56kph frontal rigid wall crash test, 50kph side crash test, 32kph 0° side pole crash test, 50kph rear crash test, and 80kph rear 70% offset crash test.) The crash safety type is confirmed based on project boundaries.

[0075]

[0076]

[0077] Table 3

[0078] According to the collision results, a plurality of collision parameter sets U1 of the body of the prototype fuel vehicle under different collision conditions are obtained; the collision parameters include strain, deformation, acceleration and intrusion speed parameters, and the deformation and strain are as shown in Table 4:

[0079]

[0080]

[0081] Table 4

[0082] According to the plurality of collision parameter sets U1 of the body of the prototype fuel vehicle under different collision conditions obtained in the above collision simulation experiment, the strain, maximum deformation and the like of the collision parameters under different conditions are combined into a graph, as shown in Figure 6

[0083] According to the strain and maximum deformation graph of the three-electric system electric safety classification in Table 5 and Figure 6 , the body is divided into three collision electric safety regions, and the results are as shown in Figure 7

[0084] The collision safety simulation results need to be benchmarked with physical tests of real vehicles to improve the accuracy of the simulation; wherein the vehicle collision acceleration (peak value and time of each peak and trough), deformation time, deformation amount and state of each key structure, failure mode of key structure, cross-sectional force and energy absorption of key region, strain and contact of key parts are compared, and the simulation model is adjusted to make the accuracy of the simulation results meet the project requirements.

[0085]

[0086] Table 5

[0087] In this embodiment, the first project target is set to carry out an oil-to-electricity project on a fuel vehicle, which needs to meet the requirements of BEV pure electricity and a cruising range of 300+km; the upper limit of the increase in the vehicle mass corresponding to this project target is set to 450kg; the upper limit of the increase in the vehicle mass corresponding to the second project target is set to 300kg;

[0088] In one embodiment, the vehicle mass of the prototype fuel vehicle can be increased to 300kg and 450kg respectively, and the collision simulation of the prototype fuel vehicle under different conditions shown in Table 3 is carried out again;

[0089] After the mass is increased to 450kg, the simulation results show that the front floor weld cracks during the frontal collision at 56kph, which cannot meet the occupant compartment integrity requirements, as shown in Figure 8 ; the strain, maximum deformation and the like under different conditions are combined into a graph, as shown in Figure 9 ; according to Figure 9 ​​The deformation and strain results and the three-electric system electric safety classification get three collision safety regions as shown in Figure 10

[0090] The simulation results show that there is no relevant risk after increasing the mass to 300 kg, the I-level safety region can meet the 155 km range at most, the vehicle body structure has no obvious risk items, and the overall layout can preliminarily meet the three-electric system electric safety layout requirements.

[0091] In another embodiment, the mass of the prototype fuel vehicle can also be increased to the expected upper limit in the simulation software as shown in Figure 4 , and the collision simulation under different conditions shown in Table 3 can be performed; then, the collision electric safety regions when the mass is increased to 300 kg and 450 kg can be obtained according to the linear interpolation method; and the collision electric safety regions are shown in Figure 10 and Figure 11

[0092] S4, according to the three collision electric safety regions of the oil-to-electric vehicle obtained in the above steps, the layout of the corresponding three-electric system components in each collision electric safety region is performed, and the three-electric layout of the oil-to-electric vehicle is obtained, as shown in Figure 5

[0093] 1. According to the volume of the I-level safety region, the power battery, OBC, and DCDC are preliminarily arranged, and whether the power battery meets the range requirement is calculated.

[0094] The range of project target one is estimated to be 160 km, which does not meet the requirement of 300 km, and the vehicle body structure has a risk of cracking of the front floor and the rocker beam; the range of project target two meets the design target of 70 km, and there is no risk point in the vehicle body structure.

[0095] 2. According to the requirements of the three-electric system, the amount of vehicle body structure modification is determined

[0096] The vehicle body structure in project target one is greatly modified, and since there is a risk of cracking of the front floor and the rocker beam in the collision simulation, the front floor, rocker, side wall, and seat cross beam need to be modified; the vehicle body structure in project target two meets the requirements of the three-electric system.

[0097] 3. Determine whether the weight change corresponds to the safety region

[0098] After the weight change in project target one, the safety region cannot meet the current project target, and 140 km of range power battery volume needs to be added.

[0099] 4. According to other safety performance requirements and weight changes, the amount of vehicle body structure modification is comprehensively determined, as shown in Figure 11 , and the specific safety performance requirements are as follows:

[0100] ​​​The area indicated by reference numeral 1 is a non-deformation area in a crash test, and cannot trigger the deformation area of the passenger restraint system and the irreversible disconnection of the HV system;

[0101] The area indicated by reference numeral 2 is a deformation area in a crash test, and the irreversible disconnection of the HV system;

[0102] The area indicated by reference numeral 3 is a deformation area in a crash test, and triggers the seat belt pretensioner / airbag stage 1, which is the reversible disconnection of the HV system.

[0103] The project finally selects the PHEV scheme shown in item 2, and the three-electricity arrangement is as shown in Figure 12 The three-electricity arrangement and the project cycle and cost meet the requirements of the initial analysis.

[0104] It can be seen that, by using the design method, in the early stage of the project, the balance condition of the three-electricity system arrangement and the vehicle body structure can be quickly found from the perspective of crash electric safety; by setting the I-level safety requirement in the method, it can be quickly identified whether the changes in cost and cycle caused by oil-to-electricity meet the project requirements; at the same time, by setting the II-level and III-level safety requirements, in actual traffic accidents, the deformation and damage of the three-electricity system after the crash can be effectively reduced, and the harm caused by electric safety after the crash of the electric vehicle can be greatly reduced.

[0105] It should be understood that the size of the serial number of each step in the above embodiment does not mean the order of execution, and the execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0106] The embodiments of the present application also include a three-electricity arrangement system for an oil-to-electricity vehicle, which comprises a three-electricity system electric safety grading module, a crash electric safety area division module, and a three-electricity system component arrangement module;

[0107] The three-electricity system electric safety grading module is used to grade the electric safety of the three-electricity system according to the performance requirements of the components of the three-electricity system;

[0108] The crash electric safety area division module is used to perform a crash simulation experiment under different crash conditions according to the predicted overall vehicle mass of the oil-to-electricity vehicle, the three-electricity system electric safety grading, and the project design boundary, to obtain the crash electric safety area of the vehicle body of the oil-to-electricity vehicle;

[0109] The crash electric safety area division module further comprises a first simulation module, a second simulation module, and a third simulation module.

[0110] The first simulation module is configured to set the whole vehicle mass of the prototype fuel vehicle to the predicted whole vehicle mass of the oil-to-electric vehicle in the simulation software, simulate the prototype fuel vehicle under different crash conditions, and obtain a plurality of crash parameters of the oil-to-electric vehicle under different crash conditions.

[0111] The second simulation module is configured to simulate the prototype fuel vehicle under different crash conditions, and obtain a set of crash parameters U1 of the prototype fuel vehicle under different crash conditions.

[0112] The third simulation module is configured to modify the whole vehicle mass of the prototype fuel vehicle in the simulation software according to the project design boundary, simulate the prototype fuel vehicle under different crash conditions, and obtain a set of crash parameters U2 of the prototype fuel vehicle under different crash conditions under one or more set whole vehicle masses.

[0113] The three-electric system component arrangement module is configured to arrange the components of the three-electric system in each crash electric safety region according to the plurality of crash electric safety regions of the oil-to-electric vehicle obtained by the crash electric safety region division module, and obtain the three-electric arrangement of the oil-to-electric vehicle.

[0114] The crash electric safety region division module further comprises an oil-to-electric vehicle crash parameter acquisition module configured to obtain a set of crash parameters U of the oil-to-electric vehicle under different crash conditions by linear interpolation according to the predicted whole vehicle mass of the oil-to-electric vehicle, the set of crash parameters U1 of the prototype fuel vehicle under different crash conditions obtained by the second simulation module, and the set of crash parameters U2 of the prototype fuel vehicle under different crash conditions under one or more set whole vehicle masses obtained by the third simulation module.

[0115] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

Claims

1. A design method for the layout of the three electric components (battery, motor, and electronic control system) of a gasoline-to-electric vehicle, characterized in that, Includes the following steps: S1. Classify the electrical safety of the three-electric system according to the component performance requirements and project design boundaries; S2. Based on the expected vehicle weight of the converted electric vehicle, the electrical safety classification of the three-electric system, and the project design boundaries, conduct collision simulation experiments under different collision conditions to obtain multiple collision electrical safety zones of the vehicle body. S3. Based on the multiple collision electric safety zones of the vehicle body obtained from the above steps and the project design boundary, arrange the corresponding components of the three-electric system in each collision electric safety zone to obtain the three-electric layout of the vehicle body. The different collision conditions include: frontal rigid wall collision test, side collision test, side column collision test, and rear collision test; The method for obtaining the collision safety zone of the vehicle body of the converted electric vehicle in S2 includes: S201. Obtain the expected vehicle mass of the converted electric vehicle. In the simulation software, set the vehicle mass of the prototype gasoline vehicle to the expected vehicle mass of the converted electric vehicle. Perform simulations under different collision conditions to obtain multiple collision parameters of the converted electric vehicle body under different collision conditions. The collision parameters include strain, deformation, acceleration and intrusion speed parameters. S202. Based on the electrical safety classification of the three-electric system and the multiple collision parameters of the vehicle body under different collision conditions obtained in the above steps, the vehicle body of the converted electric vehicle is divided into multiple collision electrical safety zones that correspond one-to-one with the electrical safety classification of the three-electric system. The partitioning method includes: Based on the multiple collision parameters of the converted electric vehicle body under different collision conditions obtained from the above steps, and the parameter limitations in the electric safety classification of the three-electric system, a one-to-one correspondence between the body area and the electric safety classification of the three-electric system is established; the body areas corresponding to the same electric safety level of the three-electric system are divided into the same collision electric safety area. The components of the three-electric system include: on-board rechargeable energy storage system, on-board charging device, voltage converter, battery management system, electric motor, electric motor interface, high-voltage wire and charging interface; The electrical safety classification of the three-electric system includes three levels of safety requirements. The components corresponding to the Level I safety requirements include: on-board rechargeable energy storage system, on-board charging device, voltage converter and high-voltage system interface; the components corresponding to the Level II safety requirements include: battery management system and high-voltage line; the components corresponding to the Level III safety requirements include: motor and charging interface. The parameter requirements corresponding to Level I safety requirements include: installation point strain ≤1%; maximum deformation ≤6mm; peak acceleration ≤55g; peak intrusion velocity ≤5m / s; The parameter requirements corresponding to Level II safety requirements include: installation point strain of 1%~3%; maximum deformation ≤10mm; The parameter requirements corresponding to Level III safety requirements include: installation point strain ≤ 5%.

2. The design method for the three-electric layout of a gasoline-to-electric vehicle as described in claim 1, characterized in that, The method for obtaining the collision electrical safety zone of the vehicle body of the converted electric vehicle in step S2 includes: S2001. Simulate the prototype vehicle (fuel vehicle) under different collision conditions to obtain the collision parameter set U1 of the prototype vehicle (fuel vehicle) under different collision conditions; the collision parameters include strain, deformation, acceleration and intrusion velocity parameters. S2002. Based on the project design boundary, modify the overall vehicle mass of the prototype fuel vehicle in the simulation software, and simulate the prototype fuel vehicle under different collision conditions to obtain one or more sets of collision parameters U2 of the prototype fuel vehicle under different collision conditions with a set overall vehicle mass. S2003. Obtain the estimated vehicle mass of the converted electric vehicle. Based on the collision parameter set U1 of the prototype fuel vehicle under different collision conditions obtained in the above steps, and one or more collision parameter sets U2 of the prototype fuel vehicle under different collision conditions with a set vehicle mass, obtain the collision parameter set U of the converted electric vehicle under different collision conditions through linear interpolation. S2004. Based on the electrical safety classification of the three-electric system and the collision parameter set U of the vehicle body of the converted electric vehicle under different collision conditions obtained in the above steps, the vehicle body of the converted electric vehicle is divided into multiple collision electrical safety zones that correspond one-to-one with the electrical safety classification of the three-electric system.

3. The design method for the three-electric layout of a gasoline-to-electric vehicle as described in claim 1, characterized in that, In step S1, the method for classifying the electrical safety of the three-electric system according to the performance requirements of its components includes: Obtain the component performance requirements of the three-electric system, including component displacement requirements, component deformation requirements, and component velocity / acceleration requirements; Based on the aforementioned component performance requirements and national standards and enterprise internal electrical safety requirements, the electrical safety of the three-electric system is classified.

4. The design method for the three-electric layout of a gasoline-to-electric vehicle as described in claim 3, characterized in that, The electrical safety classification of the three-electric system includes three levels of safety requirements. Level I safety requirements include the following parameters: strain, maximum deformation, peak acceleration, and peak intrusion velocity; Level II safety requirements include the following parameters: strain and maximum deformation; and Level III safety requirements include the following parameter: strain.

5. A system for the three-electric layout of a gasoline-to-electric vehicle according to the design method of claim 1, characterized in that, This includes a module for classifying the electrical safety of the three-electric system, a module for dividing the electrical safety zone in a collision, and a module for arranging the components of the three-electric system; The electrical safety classification module for the three-electric system is used to classify the electrical safety of the three-electric system according to the performance requirements of the components of the three-electric system; The collision electric safety zone division module is used to conduct collision simulation experiments under different collision conditions based on the expected vehicle weight of the converted electric vehicle, the electric safety classification of the three-electric system, and the project design boundaries, to obtain multiple collision electric safety zones of the vehicle body. The three-electric system component layout module is used to arrange the components of the three-electric system in each collision electric safety zone of the converted electric vehicle based on the multiple collision electric safety zones obtained by the collision electric safety zone division module, thereby obtaining the three-electric system layout of the converted electric vehicle.

6. The system for the three-electric layout of a gasoline-to-electric vehicle as described in claim 5, characterized in that, The collision electric safety zone division module also includes a first simulation module, which is used to set the vehicle mass of the prototype gasoline vehicle to the expected vehicle mass in the simulation software based on the obtained expected vehicle mass of the gasoline-converted vehicle, and to perform simulations under different collision conditions to obtain multiple collision parameters of the gasoline-converted vehicle body under different collision conditions.

7. The system for the three-electric layout of a gasoline-to-electric vehicle as described in claim 5, characterized in that, The collision electrical safety zone division module also includes a second simulation module and a third simulation module; The second simulation module is used to simulate the prototype vehicle (fuel vehicle) under different collision conditions, and obtain the collision parameter set U1 of the prototype vehicle (fuel vehicle) under different collision conditions; The third simulation module is used to modify the overall vehicle mass of the prototype fuel vehicle in the simulation software according to the project design boundary, and to simulate the prototype fuel vehicle under different collision conditions to obtain one or more sets of collision parameters U2 of the prototype fuel vehicle under different collision conditions with a set overall vehicle mass.

8. The system for the three-electric layout of a gasoline-to-electric vehicle as described in claim 7, characterized in that, The collision safety zone division module also includes a collision parameter acquisition module for converted electric vehicles; The collision parameter acquisition module for the converted electric vehicle is used to obtain the collision parameter set U of the converted electric vehicle under different collision conditions by using linear interpolation based on the expected vehicle weight of the converted electric vehicle, the collision parameter set U1 of the prototype fuel vehicle body under different collision conditions obtained by the second simulation module, and one or more collision parameter sets U2 of the prototype fuel vehicle body under different collision conditions with a set vehicle weight obtained by the third simulation module.

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