CN117313442B - Design method of power battery pack for electric heavy truck and power battery pack - Google Patents
Design method of power battery pack for electric heavy truck and power battery pack Download PDFInfo
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- CN117313442B CN117313442B CN202311636421.9A CN202311636421A CN117313442B CN 117313442 B CN117313442 B CN 117313442B CN 202311636421 A CN202311636421 A CN 202311636421A CN 117313442 B CN117313442 B CN 117313442B
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- 238000005452 bending Methods 0.000 claims description 36
- 230000003014 reinforcing effect Effects 0.000 claims description 27
- 238000007789 sealing Methods 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 7
- 239000003351 stiffener Substances 0.000 claims description 4
- 238000004590 computer program Methods 0.000 claims description 3
- 238000012938 design process Methods 0.000 abstract description 3
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/64—Constructional details of batteries specially adapted for electric vehicles
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/36—Vehicles designed to transport cargo, e.g. trucks
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
Abstract
The utility model discloses a power battery package design method and power battery package for electronic heavy truck combines the whole car parameter of electronic heavy truck to design the power battery package, and the target power battery package model that obtains can satisfy the vehicle demand and realize the high integration of power battery package and electronic heavy truck, in the design process, confirm the easy deformed weak area of power battery package and be suitable for the assembly point of atress through the atress simulation result to the power battery package model, prevent the structural deformation of power battery package for weak area configuration reinforcement, be convenient for install the power battery package on the frame chassis for assembly point configuration auxiliary member. Compared with the scheme of using the standard size power battery package in the prior art, the power battery package volume can be compressed to this application scheme, and the furthest utilizes frame chassis space, has improved whole car integrated level.
Description
Technical Field
The application relates to the technical field of power batteries, in particular to a power battery pack design method for an electric heavy truck and a power battery pack.
Background
The light weight requirement of the electric heavy truck is gradually improved, the volume and the weight of the power battery pack occupy important positions in the light weight design of the whole car, and the electric heavy truck has great significance in reducing the weight of the whole car and improving the space utilization rate of the whole car.
At present, the electric heavy truck is usually installed on the whole truck by purchasing a power battery pack due to small single product quantity, and when the electric heavy truck is installed, a frame for placing the battery pack is assembled in a reserved space of the whole truck, and then the power battery pack is placed in the frame to complete circuit connection. However, the power battery pack purchased is designed by a battery manufacturer according to a certain standard, has a fixed size and weight, and then the frame space for installing the battery pack is also fixed, which results in that the frame space is difficult to maximally utilize in the battery pack placement process, and the battery frame itself occupies a larger space, thus wasting the whole vehicle space.
Therefore, there is room for improvement in the design and assembly of the power battery pack of the electric heavy truck.
Disclosure of Invention
The technical problem that this application was to solve is that current electronic power battery package for heavy truck adopts standard battery package and frame installation, brings great extravagant problem to whole car space, and for this reason, this application has provided a power battery package design method and power battery package for electronic heavy truck.
Aiming at the technical problems, the application provides the following technical scheme:
in a first aspect, the present application provides a method for designing a power battery pack for an electric heavy truck, including:
acquiring whole vehicle parameters of the electric heavy truck, wherein the whole vehicle parameters comprise weight information, working condition information and chassis space information of the vehicle frame;
determining the type of an electric core module of a power battery pack according to the weight information and the working condition information, and determining the target size of the power battery pack according to the chassis space information of the frame;
generating an initial battery pack model according to the battery cell module selection, the target size and a preset functional piece; the preset functional piece comprises a cooling functional piece, a sealing functional piece, a bearing piece and a connecting piece;
simulating the state of the initial battery pack model assembled to a chassis of the vehicle frame, and obtaining a stress simulation result of the initial battery pack model;
determining the assembly point information of the initial battery pack model and the chassis of the vehicle frame according to the stress simulation result, and the weak area information of the initial battery pack model;
and adjusting the initial battery pack model, configuring an assembly auxiliary part at an assembly point, and configuring a reinforcing part at a weak area to obtain the target battery pack model.
The method for designing the power battery pack for the electric heavy truck according to some aspects, wherein the determining the target size of the power battery pack according to the chassis space information of the vehicle frame comprises the following steps:
dividing a chassis into a first assembly area, a second assembly area and a third assembly area according to the space information of the chassis, wherein the second assembly area is an area between two longitudinal beams, and the first assembly area and the third assembly area are symmetrically distributed on the left side and the right side of the second assembly area;
determining the number of power battery packs in the first, second and third assembly areas;
and determining the target size according to the space information of the first assembly area, the second assembly area and the third assembly area and the number of the power battery packs.
In some embodiments, the method for designing a power battery pack for an electric heavy truck further includes, if the number of power battery packs in the first assembly area, the second assembly area, and the third assembly area is plural:
determining arrangement modes of a plurality of power battery packs in the first assembly area, the second assembly area and the third assembly area;
determining a battery pack assembly reinforcement according to the arrangement mode and design information of the target battery pack model, wherein the design information comprises target weight of the target battery pack; the battery pack reinforcement includes a reinforcement structure for connecting different power battery packs of the same assembly area as a unit and a reinforcement structure for connecting different power battery packs of different assembly areas as a unit.
In a second aspect, a technical solution of the present application provides a computer program product, where program instructions are stored in the product, and after the computer or the processor reads the program instructions, the method for designing a power battery pack for an electric heavy card in any one of the first aspects is executed.
In a third aspect, the present application provides a power battery pack obtained by the power battery pack design method for an electric heavy truck according to any one of the first aspect, including a battery pack housing and a battery cell module disposed in the battery pack housing; the battery pack shell comprises a supporting framework, a bottom plate, a box body part and an upper cover, wherein the box body part seals and plugs a gap of the supporting framework; wherein:
the supporting framework is a cuboid frame, and each corner of the cuboid frame is used as a weak area; each of the weakened areas is provided with a first reinforcement matching the shape of the corner;
the first stiffener includes: the first angle plate is arranged at the corner of the upper surface of the cuboid frame, the second angle plate is arranged at the corner of the lower surface of the cuboid frame, and the first connecting plate is connected with the first angle plate and the second angle plate.
In some embodiments, the internal space of the rectangular frame is divided into at least two accommodating compartments, and a supporting frame is disposed between two adjacent accommodating compartments;
a second reinforcing piece is arranged at the position, opposite to the supporting frame, of the inner wall of the cuboid frame; the second reinforcement includes: the first T-shaped plate is arranged on the upper frame of the cuboid frame, the second T-shaped plate is arranged on the lower frame of the cuboid frame, and the second connecting plate is used for connecting the first T-shaped plate and the second T-shaped plate;
screw holes are formed in corresponding positions of the support frame and the second connecting plate, and the support frame is fixedly connected with the second connecting plate after the support frame and the screw holes of the second connecting plate are sequentially penetrated through positioning bolts.
In some aspects, the power battery pack may further include a limiting portion formed at edges of the first connecting plate and the second connecting plate, and the limiting portion is used for limiting the case member.
In some embodiments, the second connecting plate is formed with a rib, the screw hole on the second connecting plate is formed on the rib, and the rib is provided with a plurality of holes.
In some embodiments, the power battery pack is provided with a double seal at a position where the bottom plate is connected to the supporting frame, a position where the upper cover is connected to the supporting frame, and a position where the box component is connected to the supporting frame.
In a fourth aspect, the present disclosure provides a battery pack assembly comprising a plurality of power battery packs as described in any one of the second aspects.
In some embodiments, the plurality of power battery packs are divided into three groups, one group of power battery packs is arranged between two longitudinal beams of the chassis of the vehicle frame, and the other two groups of power battery packs are symmetrically arranged on the left side and the right side of the chassis of the vehicle frame; each group of power battery packs is fixedly connected with the longitudinal beam.
The battery pack assembly of some aspects, further comprising:
a third reinforcement for connecting different power battery packs of the same assembly area;
the power battery pack is characterized in that different power battery packs in the same assembly area are arranged in a stacked mode, the third reinforcing piece is arranged between the two layers of power battery packs, and the third reinforcing piece is fixedly connected with the lower surface of the upper layer of power battery pack and the upper surface of the lower layer of power battery pack through fixing pieces.
The battery pack assembly of some aspects, further comprising:
a first auxiliary member for connecting different power battery packs of different assembly areas;
the power battery pack assembly comprises a longitudinal beam, a first auxiliary piece, a second auxiliary piece, at least one power battery pack, a first power battery pack, a second power battery pack, a third auxiliary piece, a fourth power battery pack, a fifth auxiliary piece, a sixth auxiliary piece and a fourth auxiliary piece, wherein the different power battery packs in different assembly areas are arranged side by side and are separated by the longitudinal beam, and the first auxiliary piece is used for fixedly connecting at least one power battery pack with the longitudinal beam while connecting the two power battery packs arranged side by side.
In some embodiments, the first auxiliary members are disposed at two ends of the power battery pack, and each of the first auxiliary members includes a bending member and a clamping member;
the clamping piece is fixedly connected with a power battery pack;
the bending piece comprises a first bending part and a second bending part which are integrally formed; the first bending part is fixed on the other power battery pack and fixedly connected with the longitudinal beam; the second bending part extends to the bottom of the clamping piece and is fixedly connected with the bottom of the clamping piece.
In some embodiments, the battery pack assembly further includes a second bending portion integrally formed with a supporting frame of the power battery pack.
The battery pack assembly of some aspects, further comprising:
the second auxiliary piece is arranged outside the power battery pack and fixedly connected with the longitudinal beam, and the second auxiliary piece and the second reinforcing piece are oppositely arranged.
Compared with the prior art, the technical scheme of the application has the following technical effects:
according to the design method of the power battery pack for the electric heavy truck and the power battery pack, the type and the target size of the battery cell module in the power battery pack are determined according to the whole vehicle parameters of the electric heavy truck, so that the designed power battery pack can meet the power supply requirement of the electric heavy truck, and the power battery pack can carry out maximized reasonable utilization on the chassis space of the vehicle frame during assembly. The initial battery pack model obtained after the battery cell module is selected and the preset functional pieces are integrated is considered, the functions of power supply, cooling, sealing and bearing can be met, the weight of the initial battery pack model can be estimated at the moment, the stress simulation result of the initial battery pack model can be obtained after the state of the initial battery pack model assembled to a chassis is simulated according to the target size and the weight of the initial battery pack model, weak area information of the initial battery pack model can be determined under the indication of the stress simulation result, the weak area information corresponds to the position easy to deform, and the reinforcing pieces are arranged in the weak area to prevent the structure of the power battery pack from deforming. Meanwhile, in order to enable the power battery pack to have reasonable and uniform stress when being mounted on the longitudinal beam, the position of an assembly point of the power battery pack and the longitudinal beam is determined through a stress simulation result, and correspondingly, an assembly auxiliary piece is arranged at the position of the assembly point, so that the power battery pack is mounted on the longitudinal beam.
According to the scheme, the whole vehicle parameters of the electric heavy truck are combined to design the power battery pack, the obtained target power battery pack model can meet vehicle requirements, the power battery pack and the electric heavy truck are highly integrated, in the design process, the weak area where the power battery pack is easy to deform and the assembly point suitable for being stressed are determined through the stress simulation result of the power battery pack model, the reinforcing piece is configured in the weak area to prevent structural deformation of the power battery pack, and the auxiliary piece is configured in the assembly point to facilitate mounting the power battery pack on the chassis of the vehicle frame. Compared with the scheme of using the standard size power battery package in the prior art, the power battery package volume can be compressed to this application scheme, and the furthest utilizes frame chassis space, has improved whole car integrated level.
Drawings
The objects and advantages of the present application will be appreciated by the following detailed description of preferred embodiments thereof, with reference to the accompanying drawings, in which:
FIG. 1 is a flow chart of a method for designing a power battery pack for an electric heavy truck according to one embodiment of the present application;
FIG. 2 is a schematic structural view of a support framework according to one embodiment of the present disclosure;
fig. 3 is a schematic view of an upper cover structure of a power battery pack according to an embodiment of the present application;
FIG. 4 is a schematic view of a bottom plate structure of a power battery pack according to an embodiment of the present disclosure;
FIG. 5 is a schematic view of a dual-layer power battery pack housing according to one embodiment of the present application;
fig. 6 is a schematic diagram of an assembly structure of a supporting framework and a longitudinal beam of a power battery pack in a scenario in which a chassis of a vehicle frame is provided with three groups of power battery packs according to an embodiment of the present application;
FIG. 7 is a schematic view of the structure of FIG. 6 from a rear view perspective;
FIG. 8 is a left view schematic of the structure of FIG. 6;
fig. 9 is a schematic top view of the structure of fig. 6 with the upper cover assembled.
Detailed Description
The following description of the embodiments of the present application will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
In addition, the technical features described below in the different embodiments of the present application may be combined with each other as long as they do not collide with each other.
The embodiment of the application provides a design method of a power battery pack for an electric heavy truck, which is applied to a computer system equipped with simulation software (such as CAE analysis software, FEA simulation software and the like), as shown in fig. 1, and comprises the following steps:
s10: and acquiring the whole vehicle parameters of the electric heavy truck, wherein the whole vehicle parameters comprise weight information, working condition information and chassis space information of the vehicle frame.
The whole vehicle parameters of the electric heavy truck are determined when the vehicle is designed, so that the parameters can be directly obtained.
S20: and determining the type of the battery cell module of the power battery pack according to the weight information and the working condition information, and determining the target size of the power battery pack according to the chassis space information of the frame.
The weight information and the working condition information can determine the maximum electric quantity range required by the whole vehicle during operation, so that the required battery cell module selection type can be determined, and the target size of the power battery pack can be determined on the premise that a certain redundancy amount is reserved according to the space of the frame chassis in order to enable the volume of the power battery pack to utilize the space of the frame chassis to the greatest extent.
S30: generating an initial battery pack model according to the battery cell module selection, the target size and a preset functional piece; the preset functional piece comprises a cooling functional piece, a sealing functional piece, a bearing piece and a connecting piece.
The power battery pack is internally provided with the preset functional parts, and compared with the mode of arranging the functional parts outside in the prior art, the power battery pack is internally provided with the wire harness, the pipelines and the like, so that the protection performance of the functional parts and the circuits is improved.
S40: and simulating the state of the initial battery pack model assembled to the chassis of the vehicle frame, and obtaining a stress simulation result of the initial battery pack model.
And simulating the assembly relation of the initial battery pack model integrated with all functions through CAE analysis software, observing the stress simulation result in the simulation process, and determining the conditions to be met under the condition of stable and uniform stress.
S50: and determining the assembly point information of the initial battery pack model and the chassis of the vehicle frame according to the stress simulation result, and the weak area information of the initial battery pack model.
The setting of the assembly points is to meet the requirement that the power battery pack is uniformly stressed after assembly is completed, and the weak area is determined, so that the reinforcing piece can be configured for the weak area to avoid deformation of the weak area.
S60: and adjusting the initial battery pack model, configuring an assembly auxiliary part at an assembly point, and configuring a reinforcing part at a weak area to obtain the target battery pack model. The design result of the target battery pack model can meet the requirement of high integration and space utilization rate of the whole vehicle.
According to the scheme, the battery cell module in the power battery pack is selected and the target size is determined according to the whole vehicle parameters of the electric heavy truck, so that the designed power battery pack can meet the power supply requirement of the electric heavy truck, and the power battery pack can reasonably utilize the chassis space of the vehicle frame to the greatest extent during assembly. The initial battery pack model obtained after the battery cell module is selected and the preset functional pieces are integrated is considered, the functions of power supply, cooling, sealing and bearing can be met, the weight of the initial battery pack model can be estimated at the moment, the stress simulation result of the initial battery pack model can be obtained after the state of the initial battery pack model assembled to a chassis is simulated according to the target size and the weight of the initial battery pack model, weak area information of the initial battery pack model can be determined under the indication of the stress simulation result, the weak area information corresponds to the position easy to deform, and the reinforcing pieces are arranged in the weak area to prevent the structure of the power battery pack from deforming. Meanwhile, in order to enable the power battery pack to have reasonable and uniform stress when being mounted on the longitudinal beam, the position of an assembly point of the power battery pack and the longitudinal beam is determined through a stress simulation result, and correspondingly, an assembly auxiliary piece is arranged at the position of the assembly point, so that the power battery pack is mounted on the longitudinal beam.
According to the scheme, the whole vehicle parameters of the electric heavy truck are combined to design the power battery pack, the obtained target power battery pack model can meet vehicle requirements, the power battery pack and the electric heavy truck are highly integrated, in the design process, the weak area where the power battery pack is easy to deform and the assembly point suitable for being stressed are determined through the stress simulation result of the power battery pack model, the reinforcing piece is configured in the weak area to prevent structural deformation of the power battery pack, and the auxiliary piece is configured in the assembly point to facilitate mounting the power battery pack on the chassis of the vehicle frame. Compared with the scheme of using the standard size power battery package in the prior art, the power battery package volume can be compressed to this application scheme, and the furthest utilizes frame chassis space, has improved whole car integrated level.
In some aspects, in the step S20, determining the target size of the power battery pack according to the chassis space information includes:
s201: the frame chassis is divided into a first assembly area, a second assembly area and a third assembly area according to the frame chassis space information, the second assembly area is an area between two longitudinal beams, and the first assembly area and the third assembly area are symmetrically distributed on the left side and the right side of the second assembly area.
S202: the number of power cell packs in the first, second and third assembly regions is determined.
S203: and determining the target size according to the space information of the first assembly area, the second assembly area and the third assembly area and the number of the power battery packs.
The space of the chassis of the vehicle frame is divided into three parts, three assembly areas are obtained, the space information of each assembly area can be obtained, and the target size of the power battery pack can be matched with the space information of each assembly area.
When concrete application, set up two power battery packs in each assembly region, range upon range of setting from top to bottom is wrapped to two power battery packs, and after the installation was accomplished, lower floor's power battery pack and the distance on ground can satisfy the upper and lower range demand of jolting in the vehicle driving, avoid bumping or support the end, and this scheme's power battery pack designs the size of power battery pack according to frame chassis space when the design, can ensure that power battery pack installs on frame chassis, has sufficient ground clearance, need not to occupy other spaces of vehicle, realizes vehicle space utilization maximize.
Preferably, in the above aspect, the number of the power battery packs in the first assembly area, the second assembly area and the third assembly area is plural, and the method for designing the power battery packs further includes:
s2031: and determining arrangement modes of a plurality of power battery packs in the first assembly area, the second assembly area and the third assembly area.
Specifically, two power cell packs may be included in each assembly area, the two power cell packs being stacked.
S2032: determining a battery pack assembly reinforcement according to the arrangement mode and design information of the target battery pack model, wherein the design information comprises target weight of the target battery pack; the battery pack reinforcement includes a reinforcement structure for connecting different power battery packs of the same assembly area as a unit and a reinforcement structure for connecting different power battery packs of different assembly areas as a unit.
When the power battery packs are stacked, the upper power battery pack and the lower power battery pack are connected into a whole by the reinforcing piece, and the outside of the power battery pack positioned on the upper layer is assembled on the longitudinal beam through the assembly auxiliary piece. Because the power battery pack has certain weight, and the longeron is located one side of power battery pack, so after the assembly is accomplished, power battery pack has the weak area of easy deformation because of its frame of gravity effect etc. for weak area sets up the reinforcement, promotes frame construction's stability.
The embodiment of the application also provides a computer program product, wherein program instructions are stored in the product, and after the computer or a processor reads the program instructions, the method for designing the power battery pack for the electric heavy card is executed.
The embodiment of the application also provides a power battery pack designed by the design method, which comprises a battery pack shell and a battery cell module arranged in the battery pack shell. As shown in fig. 2 to 5, the battery pack case includes a support frame 100, a case member 200 sealing and blocking the space of the support frame, an upper cover 300, and a bottom plate 400.
As shown in fig. 2, a schematic diagram of a two-layer supporting framework 100 is shown, wherein the supporting framework 100 is a cuboid frame formed by combining frame structural members 101, and each corner of the cuboid frame is used as a weak area; each of the weakened areas is provided with a first stiffener 102 matching the shape of the corner, the first stiffener 102 shown in the figure comprising: the first angle plate is arranged at the corner of the upper surface of the cuboid frame, the second angle plate is arranged at the corner of the lower surface of the cuboid frame, and the first connecting plate is connected with the first angle plate and the second angle plate. Because the corner is the right angle, so first angle plate and second angle plate all are the angle plate that the contained angle is the right angle and the both sides of angle plate have the same length. Preferably, as shown in fig. 2, the first reinforcing member 102 has a chamfer board 1021, which may be a round chamfer, and may be formed when the first reinforcing member 102 is manufactured, the chamfer mode has a more gentle transition at the joint than the right angle mode, the stress is more uniform, and the stability of the corner area can be improved.
The box component 200 may be an aluminum skin welded to the support frame 100 by welding to achieve a sealed enclosure. The supporting framework 100 can be fixed together through a plurality of connecting rods by bolts, a certain gap exists between different connecting rods, and after the size of the skin is matched with the gap size, the fixing is completed in a welding mode.
The upper cover 300 may be fixed to the support frame 100 by bolts, and as shown in fig. 2, the upper cover 300 may cover the surface of the support frame 100 after being hermetically connected to the support frame 100.
As shown in fig. 4, the base plate 400 may further be provided with cooling system pipes, etc., and the size of the base plate 400 is slightly larger than the bottom size of the support frame 100 in design, so that the support frame 100 can be directly placed on the base plate 400 and then surrounded by the edge of the base plate 400. The step of mounting the base plate 400 may reserve a sufficient space for the installation of the cell module after the step of arranging the cell module is completed.
As shown in fig. 2, 3 and 6, the internal space of the rectangular parallelepiped frame is divided into at least two accommodating compartments, and a supporting frame 105 is disposed between two adjacent accommodating compartments; in the present case, the support frame 105 within the cuboid frame comprises one, i.e. the inner space of the cuboid frame is divided into two accommodation compartments. A second reinforcement 103 is provided on the rectangular parallelepiped frame at a position opposite to the support frame 105; the second reinforcement 103 includes: the first T-shaped plate is arranged on the upper frame of the cuboid frame, the second T-shaped plate is arranged on the lower frame of the cuboid frame, and the second connecting plate is used for connecting the first T-shaped plate and the second T-shaped plate; screw holes 1031 are formed in corresponding positions of the support frame 105 and the second connecting plate, and the support frame 105 is fixedly connected with the second connecting plate after penetrating through the screw holes of the support frame and the second connecting plate in sequence through positioning bolts. Through this scheme, can set up the electric core module in the holding compartment in supporting skeleton 100, accommodation space diminishes and can make the deformation of electric core module minimum, plays fine guard action to electric core module.
In connection with the supporting framework structure shown in fig. 7 and 8, the edges of the first connecting plate and the second connecting plate are both formed with a limiting portion for limiting the box component. In fig. 7, a first limiting portion 1022 is formed on the first connecting plate, and in fig. 8, a second limiting portion 1031 is formed on the second connecting plate. Corresponding in both sides of the first connecting plate and the second connecting plate are the gap parts of the supporting framework, when the box body part 200 needs to be welded to the supporting framework, the limiting part can be utilized to limit the box body part 200, so that the operations such as welding or bonding are convenient to realize.
As shown in fig. 9 and 2, a rib is formed on the second connecting plate of the second reinforcing member, the screw hole on the second connecting plate is formed on the rib, and a plurality of holes and grooves are formed on the rib. By providing the rib and providing the screw hole on the rib, the positioning and the installation of the supporting frame 105 are facilitated, and by providing the plurality of hole grooves on the rib, the overall weight of the second reinforcing member 102 can be reduced.
In the power battery pack in the above-mentioned scheme, after complete assembly, only the position where the bottom plate 400 is connected with the supporting framework 100, the position where the upper cover 300 is connected with the supporting framework 100, and the position where the box component 200 is connected with the supporting framework 100 are provided with double-way seals, and the double-way seals are sealed in a manner of adopting double-layer sealing ring arrangement. As shown in fig. 5, the surface of the supporting framework 100 connected with the upper cover 300 is a double-channel sealing surface 104, and the double-layer sealing ring is just disposed on the double-channel sealing surface 104. The sealing operation is convenient to realize through the mode, and the whole structure of the obtained power battery pack is also simple.
According to the scheme in the embodiment of the application, in order to meet the requirement of light weight of the whole structure of the power battery pack, the materials of each part can be selected to be light weight sections and processing technology on the premise of meeting the requirement. For example, the support frame 100 is used to mount the power battery pack and its components on the vehicle while transmitting the road surface excitation generated during the running of the vehicle, and may be implemented by welding aluminum extruded profiles. The case member 200 is used for mounting and sealing the cell module and its electrical parts, and may be made of an aluminum plate formed by extrusion. The first reinforcing member 102 and the second reinforcing member 103 are molded by casting or machining. The battery top cover 300 is used for top sealing of the power battery pack. The bottom plate 400 is used to bond the cell module and provide cooling for the cell module, and can be realized by adopting an aluminum alloy extrusion forming and aluminum profile butt welding process.
The embodiment of the application also provides a battery pack assembly, which comprises a plurality of the power battery packs in the embodiment. The number of power battery packs in the battery pack assembly can be determined according to the vehicle's demand for electricity and the energy density of the power battery packs.
As shown in fig. 6-9, the embodiment of the present application further provides a battery pack assembly, wherein the number of the battery packs includes three groups, one group of the battery packs is disposed between two stringers 600 of the chassis, and the other two groups of the battery packs are symmetrically disposed on the left and right sides of the chassis; each of the power cell packs is fixedly connected to the stringers 600.
Taking the power battery pack assembly mode shown in fig. 6 as an example, each group of power battery packs comprises two power battery packs which are arranged in a stacked manner, namely six power battery packs are arranged on a chassis of a frame, the power battery packs can meet the requirement of a vehicle on electric quantity, and after the power battery packs are arranged, the whole power battery packs are basically flush with a longitudinal beam, so that excessive occupation of space above the chassis is avoided, and the space utilization rate of the vehicle is improved.
As shown in fig. 6 and 7, the battery pack assembly further includes a third reinforcement 505 for connecting different power battery packs of the same assembly area as a unit; the different power battery packs in the same assembly area are stacked, the third reinforcing member 505 is arranged between the two layers of power battery packs, and the third reinforcing member 505 is fixedly connected with the lower surface of the upper layer power battery pack and the upper surface of the lower layer power battery pack through fixing members (such as bolts) respectively. As shown in fig. 7, the connection position of the third reinforcement 505 and the upper and lower power battery packs may correspond to the position of the first reinforcement 102. Through this scheme, the connecting component of two upper and lower power battery package can be hidden, promotes the integrality of whole structure.
Further, the battery pack assembly further includes a first auxiliary member for connecting different power battery packs of different assembly areas as a unit; different power battery packs of different assembly areas are arranged side by side and separated by a longitudinal beam, and at least one power battery pack is fixedly connected with the longitudinal beam while the first auxiliary piece connects the two power battery packs arranged side by side. Referring to the schematic structural diagrams shown in fig. 8 and 9, the number of the first auxiliary parts in each group of power battery packs is two, and the first auxiliary parts are respectively arranged at two ends of the power battery packs.
As shown in fig. 6, 7 and 9, each of the first auxiliary members includes a bending member and a clamping member. The clamping piece is fixedly connected with a power battery pack; specifically, the bending piece comprises a first bending part and a second bending part which are integrally formed; the first bending part is fixed on one other power battery pack and is fixedly connected with the longitudinal beam; the second bending part of the bending piece extends to the bottom of the clamping piece and is fixedly connected with the bottom of the clamping piece. Referring to fig. 7, a first power battery pack, a second power battery pack and a third power battery pack are defined from left to right, a first bending piece and a first clamping piece 504 are arranged in the middle of the first power battery pack and the second power battery pack, and a second bending piece and a second clamping piece 504' are arranged in the middle of the second power battery pack and the third power battery pack. As shown in the figure: the first clamping piece 504 is fixedly connected with one side of the second power battery pack; the first bending piece comprises a first bending part 502 and a second bending part 503 which are integrally formed; the first bending part 502 is fixed on the first power battery pack and fixedly connected with the longitudinal beam; the second bending portion 503 extends to the bottom of the first clamping member 504 and is fixedly connected to the bottom of the first clamping member 504. The second clamping piece 504' is fixedly connected with the other side of the second power battery pack; the second bending piece comprises a third bending part 502 'and a fourth bending part 503' which are integrally formed; the third bending part 502' is fixed on the third power battery pack and fixedly connected with the longitudinal beam; the fourth bending portion 503' extends to the bottom of the second clamping member 504' and is fixedly connected to the bottom of the second clamping member 504'. Through above-mentioned structure, can all install power battery package on the longeron, and above-mentioned compact structure, occupation space is little.
Further, in the above scheme, the first bending portion and the supporting framework frame of the connected power battery pack are integrally formed. As shown in fig. 7, the first bending portion 502 and the front end frame 501 of the supporting frame of the first power battery pack are integrally formed, and the third bending portion 502 'and the front end frame 501' of the supporting frame of the third power battery pack are integrally formed. Namely, the assembly auxiliary piece and a part of the supporting framework are integrally formed, no connecting joint exists between the assembly auxiliary piece and the supporting framework, the rigidity is high, the joint surface of the assembly auxiliary piece and the supporting framework basically has no stress displacement, and the reliability is high.
As shown in fig. 6, 8 and 9, the battery pack assembly further includes a second auxiliary member 506 disposed outside the power battery pack and the second auxiliary member 506 is opposite to the second reinforcing member 103; the second auxiliary element 506 is fixedly connected to the longitudinal beam. As shown in fig. 9, through this scheme, the power battery package is connected with the longeron through three auxiliary parts, and different auxiliary parts are located the corner respectively and middle part braced frame corresponds the position department, can provide even holding power. In addition, as an implementation, the second auxiliary component 506 may be only on the power battery packs located at both sides, as shown in the figure, so as to reduce the number of components.
According to the scheme in the embodiment, a reasonable power battery pack model is provided by combining whole vehicle parameters of the electric heavy truck in the design stage of the power battery pack, so that the number of internal parts of the power battery pack is reduced from the source, and the power battery pack can be assembled on a chassis of a vehicle frame on the premise of meeting the highest integration, light weight and space utilization rate of the whole vehicle. According to the scheme, the fusion structural design of the heavy truck power battery pack and the whole vehicle is redefined, and the power battery pack is installed, protected and sealed. Through reasonable stress area division, cell modules in the power battery pack are installed in a grid mode, the reinforcing piece structure of the assembly points and the weak areas is improved, so that the power battery pack is even in stress, and the frame is not easy to deform.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While nevertheless, obvious variations or modifications are contemplated as falling within the scope of the present application.
Claims (16)
1. The design method of the power battery pack for the electric heavy truck is characterized by comprising the following steps of:
acquiring whole vehicle parameters of the electric heavy truck, wherein the whole vehicle parameters comprise weight information, working condition information and chassis space information of the vehicle frame;
determining the type of an electric core module of a power battery pack according to the weight information and the working condition information, and determining the target size of the power battery pack according to the chassis space information of the frame;
generating an initial battery pack model according to the battery cell module selection, the target size and a preset functional piece; the preset functional piece comprises a cooling functional piece, a sealing functional piece, a bearing piece and a connecting piece;
simulating the state of the initial battery pack model assembled to a chassis of the vehicle frame, and obtaining a stress simulation result of the initial battery pack model;
determining the assembly point information of the initial battery pack model and the chassis of the vehicle frame according to the stress simulation result, and the weak area information of the initial battery pack model; determining the position of an assembly point of the power battery pack and the longitudinal beam through the stress simulation result, correspondingly arranging an assembly auxiliary piece at the position of the assembly point, and mounting the power battery pack on the longitudinal beam;
adjusting the initial battery pack model, configuring an assembly auxiliary part at an assembly point, and configuring a reinforcing part at a weak area to obtain a target battery pack model; the battery pack reinforcement includes a reinforcement structure for connecting different power battery packs of the same assembly area as a unit and a reinforcement structure for connecting different power battery packs of different assembly areas as a unit.
2. The method of claim 1, wherein determining the target size of the power battery pack according to the chassis space information comprises:
dividing a chassis into a first assembly area, a second assembly area and a third assembly area according to the space information of the chassis, wherein the second assembly area is an area between two longitudinal beams, and the first assembly area and the third assembly area are symmetrically distributed on the left side and the right side of the second assembly area;
determining the number of power battery packs in the first, second and third assembly areas;
and determining the target size according to the space information of the first assembly area, the second assembly area and the third assembly area and the number of the power battery packs.
3. The method of designing a power battery pack for an electric heavy truck according to claim 2, wherein if the number of power battery packs in the first, second, and third fitting areas is plural, the method further comprises:
determining arrangement modes of a plurality of power battery packs in the first assembly area, the second assembly area and the third assembly area;
and determining a battery pack assembly reinforcement according to the arrangement mode and design information of the target battery pack model, wherein the design information comprises target weight of the target battery pack.
4. A computer program product, characterized in that the program instructions are stored in the product, and a computer or a processor executes the power battery pack design method for an electric heavy card according to any one of claims 1 to 3 after reading the program instructions.
5. A power battery pack obtained by the power battery pack design method for the electric heavy truck according to any one of claims 1 to 3, which is characterized by comprising a battery pack housing and a battery cell module arranged in the battery pack housing; the battery pack shell comprises a supporting framework, a bottom plate, a box body part and an upper cover, wherein the box body part seals and plugs a gap of the supporting framework; wherein:
the supporting framework is a cuboid frame, and each corner of the cuboid frame is used as a weak area; each of the weakened areas is provided with a first reinforcement matching the shape of the corner;
the first stiffener includes: the first angle plate is arranged at the corner of the upper surface of the cuboid frame, the second angle plate is arranged at the corner of the lower surface of the cuboid frame, and the first connecting plate is connected with the first angle plate and the second angle plate.
6. The power cell pack of claim 5, wherein:
the inner space of the cuboid frame is divided into at least two accommodating compartments, and a supporting frame is arranged between two adjacent accommodating compartments;
a second reinforcing piece is arranged at the position, opposite to the supporting frame, of the inner wall of the cuboid frame; the second reinforcement includes: the first T-shaped plate is arranged on the upper frame of the cuboid frame, the second T-shaped plate is arranged on the lower frame of the cuboid frame, and the second connecting plate is used for connecting the first T-shaped plate and the second T-shaped plate;
screw holes are formed in corresponding positions of the support frame and the second connecting plate, and the support frame is fixedly connected with the second connecting plate after the support frame and the screw holes of the second connecting plate are sequentially penetrated through positioning bolts.
7. The power cell pack of claim 6, wherein:
the edges of the first connecting plate and the second connecting plate are both formed with limiting parts, and the limiting parts are used for limiting the box body parts.
8. The power cell pack of claim 6, wherein:
the second connecting plate is provided with a rib, the screw hole on the second connecting plate is formed on the rib, and the rib is provided with a plurality of holes.
9. The power cell pack of any one of claims 5-8, wherein:
the bottom plate with the position that the supporting framework is connected, the upper cover with the position that the supporting framework is connected and the box part with the position department that the supporting framework is connected all set up the double seal.
10. A battery pack assembly comprising a plurality of power battery packs as claimed in any one of claims 5 to 9.
11. The battery pack assembly of claim 10, wherein:
the power battery packs are divided into three groups, one group of power battery packs are arranged between two longitudinal beams of the chassis of the vehicle frame, and the other two groups of power battery packs are symmetrically arranged on the left side and the right side of the chassis of the vehicle frame;
each group of power battery packs is fixedly connected with the longitudinal beam.
12. The battery pack assembly of claim 11, further comprising:
a third reinforcement for connecting different power battery packs of the same assembly area;
the power battery pack is characterized in that different power battery packs in the same assembly area are arranged in a stacked mode, the third reinforcing piece is arranged between the two layers of power battery packs, and the third reinforcing piece is fixedly connected with the lower surface of the upper layer of power battery pack and the upper surface of the lower layer of power battery pack through fixing pieces.
13. The battery pack assembly of claim 11, further comprising:
a first auxiliary member for connecting different power battery packs of different assembly areas;
the power battery pack assembly comprises a longitudinal beam, a first auxiliary piece, a second auxiliary piece, at least one power battery pack, a first power battery pack, a second power battery pack, a third auxiliary piece, a fourth power battery pack, a fifth auxiliary piece, a sixth auxiliary piece and a fourth auxiliary piece, wherein the different power battery packs in different assembly areas are arranged side by side and are separated by the longitudinal beam, and the first auxiliary piece is used for fixedly connecting at least one power battery pack with the longitudinal beam while connecting the two power battery packs arranged side by side.
14. The battery pack assembly of claim 13, wherein:
the first auxiliary pieces are arranged at two ends of the power battery pack, and each first auxiliary piece comprises a bending piece and a clamping piece;
the clamping piece is fixedly connected with a power battery pack;
the bending piece comprises a first bending part and a second bending part which are integrally formed; the first bending part is fixed on the other power battery pack and fixedly connected with the longitudinal beam; the second bending part extends to the bottom of the clamping piece and is fixedly connected with the bottom of the clamping piece.
15. The battery pack assembly of claim 14, wherein:
the first bending part is integrally formed with the supporting framework frame of the power battery pack.
16. The battery pack assembly of any one of claims 13-15, further comprising:
the second auxiliary piece is arranged outside the power battery pack and fixedly connected with the longitudinal beam, and the second auxiliary piece and the second reinforcing piece are oppositely arranged.
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| CN202311636421.9A CN117313442B (en) | 2023-12-01 | 2023-12-01 | Design method of power battery pack for electric heavy truck and power battery pack |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113964439A (en) * | 2021-10-19 | 2022-01-21 | 广州小鹏汽车科技有限公司 | Power battery package and automobile body integrated configuration and vehicle of vehicle |
| WO2022262182A1 (en) * | 2021-06-18 | 2022-12-22 | 中国第一汽车股份有限公司 | Battery assembly, electric vehicle, design method, apparatus, and storage medium |
| WO2023070588A1 (en) * | 2021-10-29 | 2023-05-04 | 华为技术有限公司 | Battery and vehicle body integrated structure, and electric vehicle |
| CN219017800U (en) * | 2022-11-21 | 2023-05-12 | 上海汽车集团股份有限公司 | Power battery and electric automobile |
| WO2023103879A1 (en) * | 2021-12-06 | 2023-06-15 | 北京车和家汽车科技有限公司 | Battery module, battery pack, and vehicle |
| WO2023134425A1 (en) * | 2022-01-13 | 2023-07-20 | 宁德时代新能源科技股份有限公司 | Battery module, battery structure, and electronic device |
| CN116796434A (en) * | 2023-06-25 | 2023-09-22 | 中国第一汽车股份有限公司 | Battery frame structure optimization design method |
-
2023
- 2023-12-01 CN CN202311636421.9A patent/CN117313442B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022262182A1 (en) * | 2021-06-18 | 2022-12-22 | 中国第一汽车股份有限公司 | Battery assembly, electric vehicle, design method, apparatus, and storage medium |
| CN113964439A (en) * | 2021-10-19 | 2022-01-21 | 广州小鹏汽车科技有限公司 | Power battery package and automobile body integrated configuration and vehicle of vehicle |
| WO2023070588A1 (en) * | 2021-10-29 | 2023-05-04 | 华为技术有限公司 | Battery and vehicle body integrated structure, and electric vehicle |
| WO2023103879A1 (en) * | 2021-12-06 | 2023-06-15 | 北京车和家汽车科技有限公司 | Battery module, battery pack, and vehicle |
| WO2023134425A1 (en) * | 2022-01-13 | 2023-07-20 | 宁德时代新能源科技股份有限公司 | Battery module, battery structure, and electronic device |
| CN219017800U (en) * | 2022-11-21 | 2023-05-12 | 上海汽车集团股份有限公司 | Power battery and electric automobile |
| CN116796434A (en) * | 2023-06-25 | 2023-09-22 | 中国第一汽车股份有限公司 | Battery frame structure optimization design method |
Non-Patent Citations (3)
| Title |
|---|
| Simulation and optimization of a new energy vehicle power battery pack structure;GUANQIANG RUAN 等;《JOURNAL OF THEORETICAL AND APPLIED MECHANICS》;565-578 * |
| 纯电动汽车电池包结构优化设计研究;程必良;《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》(第9期);C035-161 * |
| 自适应响应面法在电池包尺寸优化研究中的应用;刘嘉楠 等;《设备管理与维修》(第03期);36-37 * |
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