CN109145450A - A kind of battery pack collision safety analysis method and device - Google Patents
A kind of battery pack collision safety analysis method and device Download PDFInfo
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- CN109145450A CN109145450A CN201810968177.9A CN201810968177A CN109145450A CN 109145450 A CN109145450 A CN 109145450A CN 201810968177 A CN201810968177 A CN 201810968177A CN 109145450 A CN109145450 A CN 109145450A
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/06—Power analysis or power optimisation
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Abstract
The embodiment of the invention discloses a kind of battery pack collision safety analysis method and devices, this method comprises: obtaining the preload that the battery modules in battery pack are generated in pre-connection；Collision safety analysis is carried out to battery pack based on the preload.By the example scheme, the preload that battery modules are generated during pre-connection is more consistent with truth in view of improving crash analysis precision in collision safety analytic process.
Description
Technical field
The present embodiments relate to collision safety analytical technology, espespecially a kind of battery pack collision safety analysis method and dress
It sets.
Background technique
Death toll in annual motor traffic accidents, often exceeds local war, so traffic accident has become people
One of the public hazards of class society.Therefore, from the point of view of Automobile Design angle, vehicle safety design is improved, traffic thing is reduced
Therefore injures and deaths be various countries' automobile industry research important topic.
Currently, with the rapid development of emulation technology, so that we can be by collision simulation come pre- in the design phase
The crash-worthiness for first assessing vehicle structure, is conducive to find intrinsic weak link as early as possible, to entire design and optimization process
It is effectively instructed, shortens new product development cycle, also improve the security performance of automobile.In consideration of it, present car crass
Safety analysis has become one in automobile CAE (Computer Aided Engineering computer-aided engineering) analysis
Importance.
For the new-energy automobile currently rapidly developed, battery pack is its major impetus energy, is touched in automobile
Very likely deform battery pack when hitting, so as to cause explosion, therefore, the safety collision analysis for battery pack is new energy vapour
An importance in the analysis of vehicle safety collision.
Currently, when carrying out safety collision analysis to battery pack, the shells of the battery modules of battery pack, conductor, absolutely are formed
The deformation of edge body and connector etc. is all to be modeled with standard finite element method, but the modeling of standard finite element method does not account for pre-add
Carry, the loading procedure of the pre-connection of battery modules is not taken into account, do not account for predeformation and prestressing force as a result, directly into
Row collision safety analysis, so that analysis result accuracy is lower.
Summary of the invention
In order to solve the above-mentioned technical problem, the embodiment of the invention provides a kind of battery pack collision safety analysis method and dresses
It sets, can be improved collision safety analysis precision.
In one embodiment of the present of invention, provide:
(1) a kind of battery pack collision safety analysis method, comprising:
Obtain the preload that the battery modules in battery pack are generated in pre-connection；
Collision safety analysis is carried out to battery pack based on the preload.
In one or more embodiments of the invention, provide:
(2) the battery pack collision safety analysis method according to (1), wherein the battery mould obtained in battery pack
The preload that group is generated in pre-connection may include:
Obtain the connection that the connector of battery modules and/or battery in the battery pack is connected during the pre-connection
Attribute；
The loading force of each connector is obtained according to the connection attribute of the connector and preset mapping table；
Whole connectors, which are calculated, according to the loading force of each connector is applied to the pressure loading in the battery pack,
As the preload.
(3) the battery pack collision safety analysis method according to (2), wherein the connection attribute of the connector can be with
Number, type, model, strength grade and the preload of connector used by including:.
(4) the battery pack collision safety analysis method according to (3), wherein described according to each connector
Loading force calculates the pressure loading that whole connectors are applied in the battery modules
The product obtained after the loading force of each connector is multiplied with the number of whole connectors is as complete
Portion's connector is applied to the pressure loading in the battery modules.
(5) the battery pack collision safety analysis method according to (2)-(4) any one, wherein described based on described
Preload carries out collision safety analysis to battery pack
The battery modules are modeled to obtain battery modules model, and according to the preload and the battery mould
Group model calculates the predeformation and prestressing force of the battery modules；
The predeformation of the battery modules and prestressing force are mapped as the predeformation of the collision model of the battery pack and pre-
Stress；
Collision simulation is carried out to the collision model according to the predeformation of the collision model and prestressing force, and based on collision
Simulation result carries out collision safety analysis.
(6) the battery pack collision safety analysis method according to (5), wherein the pre- change by the battery modules
Shape and prestressing force are mapped as the predeformation of the collision model of the battery pack and prestressing force may include:
Obtain preset collision pre-processing file；The collision pre-processing file in the collision model for being collided
When for the collision model provide corresponding crash data；
According to the collision pre-processing file, components relevant to collision and node in the battery modules model are set
Information, and the direction for the impact force being applied on the collision model comprising the battery modules model is set；
The crash data is updated according to the direction of the impact force and the components and nodal information；
It is mapped according to the predeformation of the battery modules and prestressing force and updated crash data, obtains battery
The predeformation and prestressing force of the collision model of packet.
(7) the battery pack collision safety analysis method according to (6), wherein the setting battery modules model
In components relevant to collision and nodal information may include: setting preloaded part, described need to carry out
Preloading node, crash element, the collision node on the crash element and transmit impact force on the part of preloading
Part.
(8) the battery pack collision safety analysis method according to (7), wherein the part preloaded
It may include: the upper cover of the battery modules；Preloading node on the part preloaded includes: the electricity
All nodes of Chi Mo group upper cover；The crash element includes: the battery modules；Collision node packet on the crash element
It includes: all nodes of battery modules；The part of the transmitting impact force includes: the upper cover of the battery modules.
(9) the battery pack collision safety analysis method according to (6), wherein described according to the pre- of the battery modules
Deformation and prestressing force and updated crash data are mapped, and the predeformation and prestressing force of the collision model of battery pack are obtained
May include:
According to preset mapping algorithm, the predeformation and prestressing force and updated collision about the battery modules are established
Incidence relation between the direction and the components and nodal information of the impact force in data, according to the impact force
Direction the predeformation and prestressing force are loaded into related components and node, formed the collision model predeformation and
Prestressing force.
(10) the battery pack collision safety analysis method according to (6), wherein the collision model includes: that receiving is touched
The collision object model of the object model to be collided and application collision that hit；
The direction of impact force that is applied on the object model to be collided comprising the battery modules model of being arranged can be with
Include:
It is completed detecting to the collision object model and comprising object mould to be collided described in the battery modules model
The position of type adjusts, and to it is described wait collide on object model after the selection for colliding node, determine respectively described wait touch
Hit the first position coordinate of node and the second position coordinate of the collision object model；
The vector of the first position coordinate will be directed toward by the second position coordinate as the direction of the impact force.
(11) the battery pack collision safety analysis method according to (5), which is characterized in that described to be based on collision simulation knot
Fruit carries out collision safety analysis
The deflection of the battery modules is obtained by the collision simulation result；
Judge whether the deflection of the battery modules meets preset standard transformations range；
When the deflection of the battery modules meets the standard transformations range, determine that the battery pack meets collision peace
It is complete to require；When the deflection of the battery modules does not meet the standard transformations range, determine that the battery pack is unsatisfactory for touching
Safety requirements is hit, it is described pre- to change to adjust the connection attribute of the connector of the battery modules and/or battery in the battery pack
Lotus is loaded, and re-starts the analysis of battery pack collision safety.
(12) the battery pack collision safety analysis method according to (6)-(11) any one, wherein
It is described that the battery modules are modeled to obtain battery modules model, and according to the preload and the electricity
Pond mould group model calculates the predeformation of the battery modules and prestressing force includes: by described in the creation of preset pre-loaded software
Battery modules model and the predeformation and prestressing force for calculating the battery modules；
The elasticity of the collision model that the predeformation of the battery modules and prestressing force are mapped as to the battery pack is pre-
Deformation and prestressing force include: that the predeformation of the battery modules and prestressing force are mapped as the electricity by preset mapping software
The elastic predeformation and prestressing force of the collision model of Chi Bao；
It is described that collision simulation is carried out to the collision model according to the predeformation and prestressing force of the collision model, and be based on
It includes: to carry out the collision simulation and the collision by preset collision software that collision simulation result, which carries out collision safety analysis,
Safety analysis.
In another embodiment of the presently claimed invention, provide:
(13) a kind of battery pack collision safety analytical equipment may include processor and computer readable storage medium, institute
It states and is stored with instruction in computer readable storage medium, wherein when described instruction is executed by the processor, realize above-mentioned
(1) to battery pack collision safety analysis method described in (12) any one.
The beneficial effect of the embodiment of the present invention may include:
1, the battery pack collision safety analysis method of the embodiment of the present invention may include: the battery modules obtained in battery pack
The preload generated in pre-connection；Collision safety analysis is carried out to battery pack based on the preload.Pass through the implementation
Example scheme, the preload that battery modules are generated during pre-connection is in view of improving in collision safety analytic process
Crash analysis precision, it is more consistent with truth.
2, the preload that the battery modules in the acquisition battery pack of the embodiment of the present invention are generated in pre-connection can wrap
It includes: obtaining the connection attribute of the connector of connection battery modules and/or battery during the pre-connection；According to the connection attribute and
Preset mapping table obtains the loading force of each connector；Whole connectors are calculated according to the loading force of each connector to be applied to
Pressure loading in battery pack, as the preload.By the example scheme, accurate obtain to battery modules is realized
And/or battery carries out pre-connection so that the molding process of battery pack is applied to the preload in battery modules, is pre- based on this
Load lotus carries out collision safety analysis to battery modules and provides technical foundation.
3, the battery modules of the embodiment of the present invention and/or the connection attribute of battery may include it is following any one or it is more
Kind: number, type, model, strength grade and the preload degree of used connector.Due to the number of connector, type,
The difference of model, strength grade and preload makes the tightening torque being applied on battery also different；Pass through the embodiment side
Case realizes the practical forming process based on battery pack to calculate the pressure loading in battery modules, so that computer sim- ulation process
It is more consistent with truth, further improve computational accuracy and analysis precision.
4, the embodiment of the present invention may include: to described to battery pack progress collision safety analysis based on the preload
Battery modules are modeled to obtain battery modules model, and calculate institute according to the preload and the battery modules model
State the predeformation and prestressing force of battery modules；The predeformation of the battery modules and prestressing force are mapped as touching for the battery pack
Hit the predeformation and prestressing force of model；The collision model is collided according to the predeformation of the collision model and prestressing force
Emulation, and collision safety analysis is carried out based on collision simulation result.Due under the action of preload, battery pack and battery
The rigidity of mould group is all changed, and in the collision safety analytic process that part variation is mapped in collision model, makes to touch
The precision for hitting analysis improves 20%.
5, the predeformation of the battery modules and prestressing force are mapped as to the collision of the battery pack in the embodiment of the present invention
The predeformation and prestressing force of model may include: to obtain preset collision pre-processing file；The collision pre-processing file is used for
Corresponding crash data is provided when the collision model is collided for the collision model；According to the collision pre-treatment text
Components relevant to collision and nodal information in the battery modules model is arranged in part, and is arranged and is applied to comprising the battery
The direction of impact force on the collision model of mould group model；According to the direction of the impact force and the components and section
Crash data described in point information update；According to the predeformation of the battery modules and prestressing force and updated crash data into
Row mapping, obtains the predeformation and prestressing force of the collision model of battery pack.By the example scheme, realize according to specific
Attribute is collided to map the predeformation and prestressing force of battery modules, so that collision simulation process is more consistent with actual collision process,
Improve mapping accuracy and reliability.
6, the battery modules are modeled described in the embodiment of the present invention to obtain battery modules model, and according to described
Preload and the battery modules model calculate the predeformation of the battery modules and prestressing force includes: by preset pre-
Load software creates the battery modules model and calculates the predeformation and prestressing force of the battery modules；It is described by the battery
The predeformation and prestressing force of mould group are mapped as the elastic predeformation of the collision model of the battery pack and prestressing force includes: by pre-
If mapping software collision model that the predeformation of the battery modules and prestressing force are mapped as the battery pack elasticity it is pre-
Deformation and prestressing force；It is described that collision simulation is carried out to the collision model according to the predeformation and prestressing force, and based on collision
It includes: to carry out the collision simulation and the collision safety by preset collision software that simulation result, which carries out collision safety analysis,
Analysis.By the example scheme, realizes and the predeformation of battery modules and pre- is calculated by preset pre-loaded software automatically
Stress realizes the linking between pre-loaded software and collision software by preset mapping software automatically, passes through preset collision
Software carries out the collision simulation and collision safety analysis, realizes the intelligence of battery pack collision safety analytic process,
Improve analysis efficiency and precision of analysis；And the File Mapping avoided between two softwares under normal conditions passes through user
It oneself writes formula translation device Fortran program and extracts the situation realized with interface, and realized by manual operation, realize
The automation of preload mapping process, improves mapping efficiency and reliability.
7, the pre-loaded software of the embodiment of the present invention may include: PAM-STAMP；Mapping software may include: Visual
Environment；Collision software may include: PAM-CRASH.PAM-STAMP is one complete, integrated and expansible completely new
Metal plate solution may include the entire process flow from process planning to processing, can be realized from mold design
Feasibility, Fast Modular face generate and modification, the simulation of metal plate punching process Quick-forming, forming accurate simulation, springback Prediction, rebound
The functions such as automatic compensation function and the output for springing back rear mold type face are all over the body；It can be well according to battery modules pre-connection
The practical connection attribute of process models battery modules, and deforming simulation result Reporting Tools therein are convenient to obtain
Deforming simulation is as a result, consequently facilitating mapped file needed for obtaining the embodiment of the present invention.PAM-CRASH software is dedicated collision
Finite Element Simulation Software, the data-interface of itself and many Grid Generation Softwares can successfully read in other software generation
Finite element mesh model, and can smoothly be docked with other software completion.The software additionally provides rigid body, rigid wall, solder joint, riveting
It a variety of entities such as connects, move strand, spring unit, make it possible the object to be collided (such as body of a motor car) for simulating labyrinth.
Visual Environment uses Integrated Architecture, can call a variety of application programs in different physics fields, and
There is Visual Environment very big flexibility can fully meet user's along with field is widely applied
Different demands；Within this platform, manual or automatic it can call and link different analog domains, therefore pass through Visual
The reliable linking between pre-loaded software PAM-STAMP and collision software PAM-CRASH may be implemented in Environment.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention can be by specification, right
Specifically noted structure is achieved and obtained in claim and attached drawing.
Detailed description of the invention
Attached drawing is used to provide to further understand technical solution of the present invention, and constitutes part of specification, with this
The embodiment of application technical solution for explaining the present invention together, does not constitute the limitation to technical solution of the present invention.
Fig. 1 is the battery pack collision safety analysis method flow chart of the embodiment of the present invention；
Fig. 2 is the side for the preload that the battery modules in the acquisition battery pack of the embodiment of the present invention are generated in pre-connection
Method flow chart；
Fig. 3 is that the tools for bolts ' pretension torque of the embodiment of the present invention indicates to be intended to；
Fig. 4 is the method flow for carrying out collision safety analysis to battery pack based on the preload of the embodiment of the present invention
Figure；
Fig. 5 is the collision model that the predeformation of battery modules and prestressing force are mapped as to battery pack of the embodiment of the present invention
Predeformation and prestressed method flow diagram；
Fig. 6 is that the determination of the embodiment of the present invention is applied to touching on the object model to be collided comprising the battery modules model
Hit the method flow diagram in the direction of power；
Fig. 7 realizes that pre-loaded software and collision software are connected detailed using preset mapping software for the embodiment of the present invention
Thin method flow diagram；
Fig. 8 is the method flow diagram that collision safety analysis is carried out based on collision simulation result of the embodiment of the present invention；
Fig. 9 is the FEM model schematic diagram of the battery modules of the embodiment of the present invention；
Figure 10 be the embodiment of the present invention preload before battery model schematic diagram；
Figure 11 is the collision battery pack schematic diagram that deformation occurs later of the embodiment of the present invention；
Figure 12 is the battery pack collision safety analytical equipment composition block diagram of the embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention
Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application
Feature can mutual any combination.
Step shown in the flowchart of the accompanying drawings can be in a computer system such as a set of computer executable instructions
It executes.Also, although logical order is shown in flow charts, and it in some cases, can be to be different from herein suitable
Sequence executes shown or described step.
Embodiment one
A kind of battery pack collision safety analysis method, as shown in Figure 1, this method may include S101-S102:
S101, the preload that the battery modules in battery pack are generated in pre-connection is obtained.
S102, collision safety analysis is carried out to battery pack based on the preload.
In embodiments of the present invention, battery pack (pack) is made of multiple battery modules, that is, uses battery cell (such as ternary
18650 battery cores), it is composed in series by mould group, battery management system, battery thermal management system can be equipped in battery pack, it can be effective
Protect battery pack safety.Battery modules are that (battery cell Cell may include 18650 battery of Panasonic: diameter by battery cell
18mm, height 65mm, voltage 3.6V), modular structure part, battery parameter detection sensor, the assembly such as electric connection component constitute,
Preload can be generated to battery cell by being linked and packed, i.e. the process that is linked and packed is applied with pre-connection to each battery cell
Loading force；The purpose for the arrangement is that keeping the pressure applied on battery cell constant, this is to ensure that the electrochemistry of cell active materials
Necessary to service life.Preload can significantly affect the rigidity of battery modules, however in current collision safety analysis, battery
The deformation of module shell, conductor, insulator and connector is modeled with standard finite element method, and the modeling of standard finite element method is not examined
The preload for considering above-mentioned pre-connection process, i.e., do not take into account the loading procedure of the pre-connection of battery modules, do not have
Consider the predeformation and prestressing force that battery modules are generated by the preload, carries out collision safety analysis, directly so as to cause electricity
The collision safety analysis result of Chi Bao is not accurate enough, so that there are collision safety hidden danger for current battery pack.
In embodiments of the present invention, the rigidity of battery modules can be significantly affected based on preload, it is necessary to model pre-add
It carries process model building and is mapped in the elastic initial denaturation and prestressing force of collision model, the embodiment of the present invention can be using molding collision
Method (Forming to Crash Methods) carrys out mapping of the preload in the elastic initial denaturation and prestressing force of collision model.
In embodiments of the present invention, molding impaction can be a kind of calculation method of finite element software, collision object
The modeling of preforming or pre-connection loading procedure, and predeformation and prestressing force result are mapped to collision model；Because to
The stiffness and strength of collision object all change, and the collision model after strengthening is calculated and then carries out subsequent collision and imitates
The analysis of true and collision safety, available higher computational accuracy.
In embodiments of the present invention, it is above-mentioned it is preforming can refer to use Sheet Metal Forming Technology to make sheet material forming part, in advance
Connection can refer to using any one or more connection attribute including the connection attributes such as being bolted, being glued, weld
Different parts is set to become an entirety or module.
In embodiments of the present invention, shadow of the preload to the rigidity of battery modules of pre-connection generation is mainly considered
It rings, and above-mentioned molding impaction is applied in the collision safety analysis of power battery pack based on the preload, improve
The collision safety analysis precision of battery pack, reduces the security risk of battery pack.
Embodiment two
The embodiment on the basis of example 1, based on the battery modules for carrying out pre-connection by connector, is explained in detail
The preload for how obtaining pre-connection generation stated.
In embodiments of the present invention, it is attached since battery modules and its battery generally use connector, and connector
Connection attribute difference determine that the preload applied to battery modules is different, therefore can be according to the connector of battery modules
Connection attribute come obtain pre-connection generation preload.It is possible to further pass through preset mapping table and the connection category
Property obtain preload, i.e., after knowing the connection attribute of battery modules, by inquiring preset mapping table, and combine simple
Operation obtains the corresponding preload of the connection attribute, and concrete scheme is as follows.
In embodiments of the present invention, as shown in Fig. 2, obtaining the pre-add that the battery modules in battery pack are generated in pre-connection
Load may include S201-S203:
S201, the connection attribute for obtaining the connector of connection battery modules and/or battery during the pre-connection.
Optionally, the connection attribute of battery modules and/or battery includes any of the following or a variety of: used connection
Number, type, model, strength grade and the preload of part.
In embodiments of the present invention, which can include but is not limited to bolt.
In embodiments of the present invention, the battery modules and/or battery that can determine composition present battery packet are in pre-connection mistake
The information such as number, type, model, strength grade and the preload of bolt employed in journey (can be obtained according to specific requirements
One such or much information is taken, with no restrictions for specifying information), for example, determining the bolt number of battery modules connection
It is 4, bolt model M5.
S202, the loading force that each connector is obtained according to the connection attribute and preset mapping table of the connector.
In embodiments of the present invention, which may include: the different type of connector, different model, no
With the corresponding relationship of one or more information such as strength grade and different preloads and the loading force of each connector.
In embodiments of the present invention, which can be tools for bolts ' pretension torque table (DIN267 standard), such as Fig. 3
It is shown.According to the mapping table, if it is determined that bolt number is 2, and bolt is hexagon socket head cap screw, diameter of bolt M4, and bolt is strong
Spending grade is 8.8, and tools for bolts ' pretension degree reaches 90%, and the loading moment of available each bolt is 4.1NM, loading force size
For 3.9KN.
S203, it is applied to the pressure loading in battery pack according to the whole connectors of the loading force of each connector calculating, made
For the preload.
In embodiments of the present invention, it after the loading force that each bolt is obtained by previous step, can further calculate
Whole bolts are applied to the pressure loading in battery modules.
In embodiments of the present invention, which can refer to the pressure or fastening torsion that connector applies on battery
Square.
Optionally, whole connectors are calculated according to the loading force of each connector and is applied to the pressure loading in battery modules
It may include: the product that is obtained after the loading force of each connector is multiplied with the number of whole connectors as whole connectors
The pressure loading being applied in battery modules.
In embodiments of the present invention, for example, the pressure loading for calculating 2 above-mentioned bolts may is that 3.9 X 2=
7.8KN。
In embodiments of the present invention, it should be noted that when the loading force of each connector is all the same, can directly adopt
The pressure loading in battery modules is obtained with the method that the loading force of each connector is multiplied with the number of whole connectors.Every
When the loading force of a connector is not identical, the loading force that each connector can be directly used is multiplied with the number of whole connectors
Method obtain the pressure loading of the identical connector of loading force respectively, by the identical connector of calculated every kind of loading force
Pressure loading be added, calculate the pressure loading that whole connectors are applied in battery modules.
Embodiment three
The embodiment on the basis of embodiment one or two, elaborate on how based on the preload to battery pack into
The analysis of row collision safety.
In embodiments of the present invention, as shown in figure 4, collision safety analysis is carried out to battery pack based on the preload can be with
Including S301-S303:
S301, the battery modules are modeled to obtain with battery modules model, and according to the preload and described
Battery modules model calculates the predeformation and prestressing force of the battery modules；
S302, the predeformation of the battery modules and prestressing force are mapped as the battery pack collision model predeformation
And prestressing force；
S303, collision simulation, and base are carried out to the collision model according to the predeformation and prestressing force of the collision model
Collision safety analysis is carried out in collision simulation result.
It in embodiments of the present invention, can be according to the preload to electricity after the preload for obtaining battery modules
Chi Mo group carries out preloading procedure modeling and is mapped as the initial denaturation of collision model and prestressing force (such as elastic initial denaturation and is answered in advance
Power), then carry out collision safety analysis.
In embodiments of the present invention, under the action of preload, the rigidity of battery pack and battery modules is all become
Change, part variation is mapped in collision model by way of modeling, i.e., first preloads, collide again, more with truth
Add and meet, the precision of crash analysis is made to improve 20%.
In embodiments of the present invention, it answers for the modeling software of battery modules and algorithm, the predeformation of battery modules and in advance
The software for calculation and algorithm of power, the creation software of collision model and algorithm, the simulation software of collision simulation and algorithm are not made to have
Body limitation can carry out above-mentioned modeling, calculating and emulation according to current existing arbitrary realization software, algorithm and device.
In embodiments of the present invention, the above-mentioned elasticity that the predeformation of battery modules and prestressing force are mapped as to collision model
Predeformation and prestressing force can be mapped by existing software, can also write formula editors manually by user
Fortran program carries out corresponding document extraction and interface is realized, is colliding mould to reach predeformation and the prestressing force of battery modules
The purpose of mapping in type.Here, with no restrictions for specific Mapping implementation scheme.
Example IV
The embodiment gives on the basis of embodiment three and is mapped as the predeformation of the battery modules and prestressing force
The predeformation of the collision model of the battery pack and a kind of prestressed specific real mode.
In embodiments of the present invention, as shown in figure 5, the predeformation of the battery modules and prestressing force are mapped as the electricity
The predeformation and prestressing force of the collision model of Chi Bao may include S401-S404:
S401, preset collision pre-processing file is obtained；The collision pre-processing file be used for the collision model into
Corresponding crash data is provided when row collision for the collision model.
S402, be arranged in the battery modules model according to the collision pre-processing file components relevant to collision and
Nodal information, and the direction for the impact force being applied on the collision model comprising the battery modules model is set.
In embodiments of the present invention, battery modules model being established by aforementioned schemes and calculating battery modules apply pre-add
After the initial denaturation and prestressing force that are generated after load, can further according to collision object (specifically refer to collision object model) relative to
The position of object (specifically referring to collision object model) to be collided and direction of advance are adjusted the object to be collided, so that touching
Hit object in the horizontal direction (such as X-axis and Y direction) treat collision object collided, rather than from vertical direction on treat collision
Object is collided.Because in routine impacts, for example, usually being touched from what the side surrounding of vehicle occurred when vehicle collides
Biggish impact can be generated to battery pack by hitting, it is made to generate deformation and stress, rather than the collision generated from the top of vehicle.Cause
This, which is adjusted it is necessary to treat the collision Impact direction of collision object so that by the side surrounding of object to be collided by
Power.
In embodiments of the present invention, above-mentioned object to be collided is referred to as being collided object, is somebody's turn to do in the model of object to be collided
It may include battery pack model, such as auto model comprising battery pack model；Or being somebody's turn to do the model of object to be collided itself is electricity
Pond packet model or battery modules model.
In embodiments of the present invention, the above-mentioned collision Impact direction for treating collision object, which is adjusted, is primarily referred to as to battery
The Impact direction of mould group model is adjusted, so that the side surrounding stress of battery modules model, so that Impact direction and pre-
The force direction of load is vertical, such as: if the preloading of battery modules before is+Z gravity direction, head-on crash can be with later
It is +X direction, side collision can be +Y direction.
In embodiments of the present invention, the collision model may include: that the object model to be collided for receiving collision and application are touched
The collision object model hit；As shown in fig. 6, the determination is applied on the object model to be collided comprising the battery modules model
The direction of impact force may include S501-S502:
S501, detect be completed to the collision object model and comprising described in the battery modules model wait collide
The position of object model adjusts, and to it is described wait collide on object model after the selection for colliding node, determine respectively described in
The second position coordinate of the first position coordinate of node to be collided and the collision object model；
S502, the vector of the first position coordinate will be directed toward by the second position coordinate as the side of the impact force
To.
In embodiments of the present invention, bronze drum above-described embodiment scheme accurate the can determine and object to be collided is provided
The direction of impact force on model.In embodiments of the present invention, after setting up the collision Impact direction of battery modules model, may be used also
To carry out components relevant to collision and nodal information in step setting battery modules model, in order to according to these components
And nodal information collides battery modules model time.
In embodiments of the present invention, components relevant to collision and nodal information in battery modules model, which is arranged, can wrap
It includes: the part that setting is preloaded, the preloading node on the part, crash element, the collision on the crash element
It is any one or more in node and the part of transmitting impact force.
In embodiments of the present invention, for for battery modules model, the part preloaded may include: electricity
The upper cover of Chi Mo group；Preloading node on part may include: all nodes of battery modules upper cover；Crash element can wrap
It includes: battery modules；Collision node on crash element may include: all nodes of battery modules；Transmit the part of impact force
It may include: the upper cover of battery modules.
S403, the crash data is updated according to the direction of the impact force and the components and nodal information.
In embodiments of the present invention, updated crash data may include: and answer according to the predeformation of battery modules and in advance
The elastic predeformation and prestressing force for the collision model that power and battery modules model are calculated.
S404, it is mapped, is obtained according to the predeformation and prestressing force and updated crash data of the battery modules
To the predeformation and prestressing force of the collision model of battery pack.
In embodiments of the present invention, according to the predeformation of the battery modules and prestressing force and updated crash data
It is mapped, the predeformation and prestressing force for obtaining the collision model of battery pack may include:
According to preset mapping algorithm, the predeformation and prestressing force and updated collision about the battery modules are established
Incidence relation between the direction and the components and nodal information of the impact force in data, according to the impact force
Direction the predeformation and prestressing force are loaded into related components and node, formed the collision model predeformation and
Prestressing force.
In embodiments of the present invention, which can be provided by existing mapping software, can also be led to
It crosses user and writes the progress corresponding document extraction of formula editors Fortran program and interface realization manually, to reach battery modules
The mapping on collision model of predeformation and prestressing force purpose.Here, specific algorithm content for mapping algorithm and
Acquisition modes are with no restrictions.
Embodiment five
How the embodiment gives on the basis of embodiment three by preset pre-loaded software, preset mapping
Software and preset collision software carry out a kind of specific real mode of collision safety analysis to battery pack.
In embodiments of the present invention, described that the battery modules are modeled to obtain battery modules model, and according to institute
It states preload and the battery modules model calculates the predeformation of the battery modules and prestressing force may include: by pre-
If pre-loaded software create the battery modules model and calculate the predeformation and prestressing force of the battery modules.
In embodiments of the present invention, described that the predeformation of the battery modules and prestressing force are mapped as the battery pack
The elastic predeformation and prestressing force of collision model may include: by preset mapping software by the predeformation of the battery modules
The elastic predeformation and prestressing force of the collision model of the battery pack are mapped as with prestressing force.
In embodiments of the present invention, described that the collision model is collided according to the elastic predeformation and prestressing force
Emulation, and carrying out collision safety analysis based on collision simulation result may include: by touching described in the progress of preset collision software
Hit emulation and collision safety analysis.
In embodiments of the present invention, it by the example scheme, realizes and is calculated automatically by preset pre-loaded software
The predeformation and prestressing force of battery modules, are realized between pre-loaded software and collision software automatically by preset mapping software
Linking carries out the collision simulation by preset collision software and the collision safety is analyzed, and realizes battery pack collision peace
The intelligence of complete analysis process, improves analysis efficiency and precision of analysis；And avoid under normal conditions two software it
Between File Mapping formula translation device Fortran program write by user oneself extract and realized with interface, and pass through hand
The situation that dynamic operation is realized, realizes the automation of preload mapping process, improves mapping efficiency and reliability.
Embodiment six
The embodiment on the basis of embodiment five, give according to by preset mapping software by the battery modules
Predeformation and prestressing force be mapped as the battery pack collision model elastic predeformation and a kind of prestressed specific implementation
Mode.
In embodiments of the present invention, mapping software can specifically realize pre-loaded software and be touched by following embodiment steps
The predeformation of battery modules and prestressing force are mapped as the elastic predeformation of the collision model of battery pack and pre- by the linking for hitting software
Stress, as shown in fig. 7, specific steps may include B01-B14:
B01: export folders is defined.
B02: the collision pre-processing file of collision software is read.
B03: it reads mapped file (being generated by pre-loaded software).
B04:Inverse Stamp Part。
The step for according to collision object position and direction, adjust the collision Impact direction of battery modules.Battery mould before
The preloading of group is+Z gravity direction；Head-on crash is usually +X direction later, and side collision is usually +Y direction.
B05: the part of load: battery modules upper cover is selected.
B06: the component of collision: battery modules is selected.
B07: mapping method is defined.
B08: the node of selection load part: all nodes of battery modules upper cover.
B09: the node of selection collision part: all nodes of battery modules.
B10: the load part of transmitting: battery modules upper cover is shown.
B11: other nodes are selected? if so, return step B08；B12 is entered step if not.
B12: other are selected to collide part? if so, return step B06；B13 is entered step if not.
B13: other mapped files are selected? if so, return step B03；B14 is entered step if not.
B14: new collision pre-processing file is created.
In embodiments of the present invention, it may include updated crash data in the new collision pre-processing file, be based on
The new collision pre-processing file can carry out collision simulation, so as to based on the battery pack and battery modules after generation variation in rigidity
It is collided, improves crash analysis precision.
Embodiment seven
The embodiment gives the specific of pre-loaded software, mapping software and collision software on the basis of embodiment five
Embodiment.
In embodiments of the present invention, pre-loaded software may include: PAM-STAMP；Mapping software may include: Visual
Environment；Collision software may include: PAM-CRASH.
In embodiments of the present invention, battery modules model can be created by pre-loaded software PAM-STAMP and calculates electricity
The predeformation and prestressing force of Chi Mo group；The collision model of battery pack, which is created, by collision software PAM-CRASH and carries out collision imitates
The analysis of true and safety collision.
In embodiments of the present invention, PAM-STAMP is a complete, integrated and expansible completely new metal plate solution,
It may include the entire process flow from process planning to processing, can be realized the feasibility from mold design, Fast Modular
Face generates and modification, the simulation of metal plate punching process Quick-forming, the accurate simulation of forming, springback Prediction, rebound automatic compensation function
And the functions such as the output in rebound rear mold type face are all over the body；It can be well according to the practical company of battery modules pre-connection process
It connects attribute to model battery modules, and deforming simulation result Reporting Tools therein are convenient to obtain deforming simulation knot
Fruit, consequently facilitating mapped file needed for obtaining the embodiment of the present invention.PAM-CRASH software is dedicated collision finite element modelling
Software, the data-interface of itself and many Grid Generation Softwares can successfully read in the finite element grid of other software generation
Model, and can smoothly be docked with other software completion.The software additionally provides rigid body, rigid wall, solder joint, riveting, movement strand, bullet
A variety of entities such as spring unit, make it possible simulate labyrinth object to be collided (such as body of a motor car).
In embodiments of the present invention, the mapping software of use is the Visual Environment of ESI Software, using it
The linking of the realization of Visual Process module pre-loaded software PAM-STAMP and collision software PAM-CRASH.The mode of connection
It is the mapping of mesh node information.
In embodiments of the present invention, battery modules model is being created by PAM-STAMP and is calculating the pre- changes of battery modules
After shape and prestressing force, corresponding mapped file can be generated；Wherein, in mapped file comprising battery modules predeformation and answer in advance
Power.Before carrying out collision simulation by PAM-CRASH, it can be incited somebody to action by preset mapping software Visual Environment
Mapped file is mapped on the collision model of the battery pack of PAM-CRASH creation, by the predeformation and prestressing force of battery modules
It is mapped as the elastic initial denaturation and prestressing force of collision model.
In embodiments of the present invention, the core algorithm of mapping is that Visual Environment software provides, can be automatic
The predeformation of battery modules and prestressing force are mapped in the elastic initial denaturation and prestressing force of collision model by realization.Current mapping
In technology be usually user oneself write Fortran program extract with interface realize, need to be manually operated realization.The present invention
The Visual Environment software kernels algorithm integration Du Genggao that example scheme uses is fully automated.
Embodiment eight
The embodiment gives on the basis of above-mentioned any embodiment carries out collision safety point based on collision simulation result
The specific embodiment scheme of analysis.
Optionally, as shown in figure 8, carrying out collision safety analysis based on collision simulation result may include S601-S603:
S601, the deflection that battery modules are obtained by collision simulation result；
S602, judge whether the deflection of battery modules meets preset standard transformations range；
S603, when the deflection of battery modules complies with standard deformation range, determine battery pack meet collision safety requirement；
When the deflection of battery modules does not meet standard transformations range, determines that battery pack is unsatisfactory for collision safety requirement, adjust battery
The connection attribute of the connector of mould group and/or battery re-starts the analysis of battery pack collision safety to change preload.
In embodiments of the present invention, crash analysis can be carried out to battery modules with PAM-CRASH software, obtains battery mould
The deflection of group, and judge the deflections of battery modules whether within the scope of standard transformations adjusts battery modules and/or battery
Connection attribute re-starts the analysis of battery pack collision safety to change the preload.
Optionally, which can include but is not limited to: the deflection of battery modules is less than 30%.
In embodiments of the present invention, if it is decided that the deflection of battery modules has been more than standard transformations range, and such as 30%, then
The structure design of battery modules, or the pretightning force of adjustment connector (such as bolt) can be modified, collision safety point is re-started
Analysis.
Embodiment nine
The embodiment gives completely touching based on the embodiment of the present invention on the basis of above-mentioned any embodiment
Hit safety analysis embodiment.
In embodiments of the present invention, it can be illustrated using certain model vehicle as case study on implementation, as shown in figure 9, being whole
The finite element model of battery modules in vehicle.The example scheme analyzes the battery modules of certain model electric car.The battery mould
Group is assembled by 30 section, 18650 single battery, using ternary lithium cell.The battery pack that this embodiment scheme is directed to, by
Multiple battery modules as shown in Figure 10 are connected in series, and Figure 10 is the battery model picture before being preloaded.
In embodiments of the present invention, after carrying out tools for bolts ' pretension, the maximum distortion for completing the battery modules of load is
0.1928mm, completes the maximum stress 178MPa of the battery modules of load, and battery modules are hardened.In the effect of preload
Under, the rigidity of battery pack and battery modules is all changed.The embodiment of the present invention is using molding impaction (Forming
To Crash Methods) it first preloads, collide again, it is more in line with truth.Since after bolt preloading, battery
Mould group intensity improves, and realizes the process of a hardening.This preloading procedure cannot be ignored, can using finite element software into
Row calculates.
In embodiments of the present invention, calculated result is imported collision software and carries out crash analysis.Battery pack is sent out after collision
Deformation is given birth to, as shown in figure 11, the rigidity of battery pack and battery modules is the rigidity considered after forming process.The step analyzed in this way
So that the precision of crash analysis is improved 20% suddenly；It is more consistent with true situation.
Embodiment ten
The embodiment of the invention also provides a kind of battery pack collision safety analytical equipments 1, as shown in figure 12, including processor
11 and computer readable storage medium 12, instruction is stored in the computer readable storage medium 12, when the instruction is by processor
When 11 execution, above-mentioned battery pack collision safety analysis method is realized.
The beneficial effect of the embodiment of the present invention may include:
1, the battery pack collision safety analysis method of the embodiment of the present invention may include: the battery modules obtained in battery pack
The preload generated in pre-connection；Collision safety analysis is carried out to battery pack based on the preload.Pass through the implementation
Example scheme, the preload that battery modules are generated during pre-connection is in view of improving in collision safety analytic process
Crash analysis precision, it is more consistent with truth.
2, the preload that the battery modules in the acquisition battery pack of the embodiment of the present invention are generated in pre-connection can wrap
It includes: obtaining the connection attribute of the connector of connection battery modules and/or battery during the pre-connection；According to the connection attribute and
Preset mapping table obtains the loading force of each connector；Whole connectors are calculated according to the loading force of each connector to be applied to
Pressure loading in battery pack, as the preload.By the example scheme, accurate obtain to battery modules is realized
And/or battery carries out pre-connection so that the molding process of battery pack is applied to the preload in battery modules, is pre- based on this
Load lotus carries out collision safety analysis to battery modules and provides technical foundation.
3, the battery modules of the embodiment of the present invention and/or the connection attribute of battery may include it is following any one or it is more
Kind: number, type, model, strength grade and the preload degree of used connector.Due to the number of connector, type,
The difference of model, strength grade and preload makes the tightening torque being applied on battery also different；Pass through the embodiment side
Case realizes the practical forming process based on battery pack to calculate the pressure loading in battery modules, so that computer sim- ulation process
It is more consistent with truth, further improve computational accuracy and analysis precision.
4, the embodiment of the present invention may include: to described to battery pack progress collision safety analysis based on the preload
Battery modules are modeled to obtain battery modules model, and calculate institute according to the preload and the battery modules model
State the predeformation and prestressing force of battery modules；The predeformation of the battery modules and prestressing force are mapped as touching for the battery pack
Hit the predeformation and prestressing force of model；The collision model is collided according to the predeformation of the collision model and prestressing force
Emulation, and collision safety analysis is carried out based on collision simulation result.Due under the action of preload, battery pack and battery
The rigidity of mould group is all changed, and in the collision safety analytic process that part variation is mapped in collision model, makes to touch
The precision for hitting analysis improves 20%.
5, the predeformation of the battery modules and prestressing force are mapped as to the collision of the battery pack in the embodiment of the present invention
The predeformation and prestressing force of model may include: to obtain preset collision pre-processing file；The collision pre-processing file is used for
Corresponding crash data is provided when the collision model is collided for the collision model；According to the collision pre-treatment text
Components relevant to collision and nodal information in the battery modules model is arranged in part, and is arranged and is applied to comprising the battery
The direction of impact force on the collision model of mould group model；According to the direction of the impact force and the components and section
Crash data described in point information update；According to the predeformation of the battery modules and prestressing force and updated crash data into
Row mapping, obtains the predeformation and prestressing force of the collision model of battery pack.By the example scheme, realize according to specific
Attribute is collided to map the predeformation and prestressing force of battery modules, so that collision simulation process is more consistent with actual collision process,
Improve mapping accuracy and reliability.
6, the battery modules are modeled described in the embodiment of the present invention to obtain battery modules model, and according to described
Preload and the battery modules model calculate the predeformation of the battery modules and prestressing force includes: by preset pre-
Load software creates the battery modules model and calculates the predeformation and prestressing force of the battery modules；It is described by the battery
The predeformation and prestressing force of mould group are mapped as the elastic predeformation of the collision model of the battery pack and prestressing force includes: by pre-
If mapping software collision model that the predeformation of the battery modules and prestressing force are mapped as the battery pack elasticity it is pre-
Deformation and prestressing force；It is described that collision simulation is carried out to the collision model according to the predeformation and prestressing force, and based on collision
It includes: to carry out the collision simulation and the collision safety by preset collision software that simulation result, which carries out collision safety analysis,
Analysis.By the example scheme, realizes and the predeformation of battery modules and pre- is calculated by preset pre-loaded software automatically
Stress realizes the linking between pre-loaded software and collision software by preset mapping software automatically, passes through preset collision
Software carries out the collision simulation and collision safety analysis, realizes the intelligence of battery pack collision safety analytic process,
Improve analysis efficiency and precision of analysis；And the File Mapping avoided between two softwares under normal conditions passes through user
It oneself writes formula translation device Fortran program and extracts the situation realized with interface, and realized by manual operation, realize
The automation of preload mapping process, improves mapping efficiency and reliability.
7, the pre-loaded software of the embodiment of the present invention may include: PAM-STAMP；Mapping software may include: Visual
Environment；Collision software may include: PAM-CRASH.PAM-STAMP is one complete, integrated and expansible completely new
Metal plate solution may include the entire process flow from process planning to processing, can be realized from mold design
Feasibility, Fast Modular face generate and modification, the simulation of metal plate punching process Quick-forming, forming accurate simulation, springback Prediction, rebound
The functions such as automatic compensation function and the output for springing back rear mold type face are all over the body；It can be well according to battery modules pre-connection
The practical connection attribute of process models battery modules, and deforming simulation result Reporting Tools therein are convenient to obtain
Deforming simulation is as a result, consequently facilitating mapped file needed for obtaining the embodiment of the present invention.PAM-CRASH software is dedicated collision
Finite Element Simulation Software, the data-interface of itself and many Grid Generation Softwares can successfully read in other software generation
Finite element mesh model, and can smoothly be docked with other software completion.The software additionally provides rigid body, rigid wall, solder joint, riveting
It a variety of entities such as connects, move strand, spring unit, make it possible the object to be collided (such as body of a motor car) for simulating labyrinth.
Visual Environment uses Integrated Architecture, can call a variety of application programs in different physics fields, and
There is Visual Environment very big flexibility can fully meet user's along with field is widely applied
Different demands；Within this platform, manual or automatic it can call and link different analog domains, therefore pass through Visual
The reliable linking between pre-loaded software PAM-STAMP and collision software PAM-CRASH may be implemented in Environment.
It will appreciated by the skilled person that whole or certain steps, system, dress in method disclosed hereinabove
Functional module/unit in setting may be implemented as software, firmware, hardware and its combination appropriate.In hardware embodiment,
Division between the functional module/unit referred in the above description not necessarily corresponds to the division of physical assemblies；For example, one
Physical assemblies can have multiple functions or a function or step and can be executed by several physical assemblies cooperations.Certain groups
Part or all components may be implemented as by processor, such as the software that digital signal processor or microprocessor execute, or by
It is embodied as hardware, or is implemented as integrated circuit, such as specific integrated circuit.Such software can be distributed in computer-readable
On medium, computer-readable medium may include computer storage medium (or non-transitory medium) and communication media (or temporarily
Property medium).As known to a person of ordinary skill in the art, term computer storage medium is included in for storing information (such as
Computer readable instructions, data structure, program module or other data) any method or technique in the volatibility implemented and non-
Volatibility, removable and nonremovable medium.Computer storage medium include but is not limited to RAM, ROM, EEPROM, flash memory or its
His memory technology, CD-ROM, digital versatile disc (DVD) or other optical disc storages, magnetic holder, tape, disk storage or other
Magnetic memory apparatus or any other medium that can be used for storing desired information and can be accessed by a computer.This
Outside, known to a person of ordinary skill in the art to be, communication media generally comprises computer readable instructions, data structure, program mould
Other data in the modulated data signal of block or such as carrier wave or other transmission mechanisms etc, and may include any information
Delivery media.
Claims (13)
1. a kind of battery pack collision safety analysis method, which is characterized in that the described method includes:
Obtain the preload that the battery modules in battery pack are generated in pre-connection；
Collision safety analysis is carried out to battery pack based on the preload.
2. battery pack collision safety analysis method according to claim 1, which is characterized in that in the acquisition battery pack
The preload that battery modules are generated in pre-connection includes:
Obtain the connection category that the connector of battery modules and/or battery in the battery pack is connected during the pre-connection
Property；
The loading force of each connector is obtained according to the connection attribute of the connector and preset mapping table；
Whole connectors, which are calculated, according to the loading force of each connector is applied to the pressure loading in the battery pack, as
The preload.
3. battery pack collision safety analysis method according to claim 2, which is characterized in that the connection category of the connector
Property include: used by connector number, type, model, strength grade and preload.
4. battery pack collision safety analysis method according to claim 3, which is characterized in that described according to each company
The loading force of fitting calculates the pressure loading that whole connectors are applied in the battery modules
The product obtained after the loading force of each connector is multiplied with the number of whole connectors connects as whole
Fitting is applied to the pressure loading in the battery modules.
5. according to battery pack collision safety analysis method described in claim 2-4 any one, which is characterized in that described to be based on
The preload carries out collision safety analysis to battery pack
The battery modules are modeled to obtain battery modules model, and according to the preload and the battery modules mould
Type calculates the predeformation and prestressing force of the battery modules；
The predeformation of the battery modules and prestressing force are mapped as to the predeformation and prestressing force of the collision model of the battery pack；
Collision simulation is carried out to the collision model according to the predeformation of the collision model and prestressing force, and is based on collision simulation
As a result collision safety analysis is carried out.
6. battery pack collision safety analysis method according to claim 5, which is characterized in that described by the battery modules
Predeformation and prestressing force be mapped as the battery pack collision model predeformation and prestressing force include:
Obtain preset collision pre-processing file；The collision pre-processing file for being when the collision model is collided
The collision model provides corresponding crash data；
According to the collision pre-processing file, components relevant to collision and nodal information in the battery modules model are set,
And the direction for the impact force being applied on the collision model comprising the battery modules model is set；
The crash data is updated according to the direction of the impact force and the components and nodal information；
It is mapped according to the predeformation of the battery modules and prestressing force and updated crash data, obtains battery pack
The predeformation and prestressing force of collision model.
7. battery pack collision safety analysis method according to claim 6, which is characterized in that the setting battery mould
In group model components relevant to collision and nodal information include: setting preloaded part, it is described need into
The preloading node on part, crash element, the collision node on the crash element and the transmitting impact force that row preloads
Part.
8. battery pack collision safety analysis method according to claim 7, which is characterized in that described to be preloaded
Part include: the battery modules upper cover；Preloading node on the part preloaded includes: described
All nodes of battery modules upper cover；The crash element includes: the battery modules；Collision node on the crash element
It include: all nodes of battery modules；The part of the transmitting impact force includes: the upper cover of the battery modules.
9. battery pack collision safety analysis method according to claim 6, which is characterized in that described according to the battery mould
The predeformation and prestressing force and updated crash data of group are mapped, obtain the collision model of battery pack predeformation and
Prestressing force includes:
According to preset mapping algorithm, the predeformation and prestressing force about the battery modules and updated crash data are established
In the impact force direction and the components and nodal information between incidence relation, according to the side of the impact force
It is loaded into related components and node to by the predeformation and prestressing force, forms the predeformation of the collision model and answers in advance
Power.
10. battery pack collision safety analysis method according to claim 6, which is characterized in that the collision model includes:
Receive the object model to be collided of collision and applies the collision object model of collision；
The direction that the impact force being applied on the object model to be collided comprising the battery modules model is arranged includes:
It is completed detecting to the collision object model and comprising object model to be collided described in the battery modules model
Position adjustment, and to it is described wait collide on object model after the selection for colliding node, determine respectively described wait collide section
The second position coordinate of the first position coordinate of point and the collision object model；
The vector of the first position coordinate will be directed toward by the second position coordinate as the direction of the impact force.
11. battery pack collision safety analysis method according to claim 5, which is characterized in that described to be based on collision simulation
As a result carrying out collision safety analysis includes:
The deflection of the battery modules is obtained by the collision simulation result；
Judge whether the deflection of the battery modules meets preset standard transformations range；
When the deflection of the battery modules meets the standard transformations range, determine that the battery pack meets collision safety and wants
It asks；When the deflection of the battery modules does not meet the standard transformations range, determine that the battery pack is unsatisfactory for collision peace
It is complete to require, the connection attribute of the connector of the battery modules and/or battery in the battery pack is adjusted to change the preloading
Lotus, and re-start the analysis of battery pack collision safety.
12. according to battery pack collision safety analysis method described in claim 6-11 any one, which is characterized in that
It is described that the battery modules are modeled to obtain battery modules model, and according to the preload and the battery mould
Group model calculates the predeformation of the battery modules and prestressing force includes: to create the battery by preset pre-loaded software
Mould group model and the predeformation and prestressing force for calculating the battery modules；
The elastic predeformation of the collision model that the predeformation of the battery modules and prestressing force are mapped as to the battery pack
It include: that the predeformation of the battery modules and prestressing force are mapped as by the battery pack by preset mapping software with prestressing force
Collision model elastic predeformation and prestressing force；
It is described that collision simulation is carried out to the collision model according to the predeformation and prestressing force of the collision model, and based on collision
It includes: to carry out the collision simulation and the collision safety by preset collision software that simulation result, which carries out collision safety analysis,
Analysis.
13. a kind of battery pack collision safety analytical equipment, including processor and computer readable storage medium, the computer can
It reads to be stored with instruction in storage medium, which is characterized in that when described instruction is executed by the processor, realize such as claim
Battery pack collision safety analysis method described in 1-12 any one.
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| CN111625902A (en) * | 2020-05-11 | 2020-09-04 | 恒大新能源汽车投资控股集团有限公司 | Equivalent simulation method for electric automobile column collision |
| CN115982859A (en) * | 2023-01-16 | 2023-04-18 | 吉林化工学院 | Lightweight simulation analysis system and method for temperature-controllable vehicle power battery box |
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