CN117039299A - Frame construction, battery package and vehicle - Google Patents

Frame construction, battery package and vehicle Download PDF

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Publication number
CN117039299A
CN117039299A CN202310902208.1A CN202310902208A CN117039299A CN 117039299 A CN117039299 A CN 117039299A CN 202310902208 A CN202310902208 A CN 202310902208A CN 117039299 A CN117039299 A CN 117039299A
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CN
China
Prior art keywords
frame
battery
frame structure
vehicle
battery pack
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310902208.1A
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Chinese (zh)
Inventor
刘振勇
黄敏
曹元璞
吴占玲
冯绍虎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lantu Automobile Technology Co Ltd
Original Assignee
Lantu Automobile Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lantu Automobile Technology Co Ltd filed Critical Lantu Automobile Technology Co Ltd
Priority to CN202310902208.1A priority Critical patent/CN117039299A/en
Publication of CN117039299A publication Critical patent/CN117039299A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
    • 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
    • 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
    • B60L50/66—Arrangements of batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sustainable Development (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The application discloses a frame structure, a battery pack and a vehicle.A cavity of a frame is divided into a control cabin and a battery cabin through a first cross beam, at least one side beam of the frame in the Y direction is provided with a vertical face part, a guide part and a mounting part, the vertical face part is close to the control cabin and the battery cabin and serves as a mounting base for other parts of the battery pack, and the vertical face part is connected with the first cross beam. The guiding part is positioned between the vertical surface part and the mounting part and plays a role in guiding deformation, one end of the guiding part is connected to the outer vertical surface of the vertical surface part, and the other end of the guiding part is connected to the mounting part. The inside die cavity of mount portion can take place to collapse under the effect of collision force, and under certain circumstances, mount portion also can take place deformation to the direction of height of vehicle under the guiding effect of guiding portion, for example upwards crooked upset or downwarping upset, and the short-time energy release of the in-process absorption, dissipation collision operating mode that can be better satisfies whole car collision and battery package extrusion to the different demands of battery box, effectively protects frame internals.

Description

Frame construction, battery package and vehicle
Technical Field
The application belongs to the technical field of battery pack box structures, and particularly relates to a frame structure, a battery pack and a vehicle.
Background
The battery pack box body is used as a structural main body of the battery pack, provides an accommodating space for parts in the battery pack, is an installation carrier for all parts of the whole pack, and has the functions of accommodating, separating, bearing and installing the parts in the battery pack and protecting the parts mechanically.
The battery pack extrusion test and the whole vehicle-level column collision test are important evaluation items for inspecting the mechanical protection design strength of the battery pack box body, but the evaluation angles are different, and the requirements on the mechanical protection function of the battery pack are also different. The battery pack box body which is the mainstream at present is of an aluminum alloy frame type and is formed by welding a plurality of aluminum extrusion profiles, and energy is absorbed through the collapse of the cavity of the aluminum profile during collision. In the face of different use conditions and collision risks, the existing battery pack box body is difficult to meet different requirements of whole car collision and battery pack extrusion on the battery box body, and the protection capability on the battery cell is low, so that the collision performance of the battery pack box body is improved, parts in the box body are effectively protected when the battery pack box body collides, and the battery pack box body is an important research and development point in the industry.
Disclosure of Invention
The application provides a frame structure, a battery pack and a vehicle, and aims to solve the technical problem that the existing battery pack box is difficult to meet different requirements of whole vehicle collision and battery pack extrusion on the battery box.
In a first aspect of the application, a frame structure is provided, comprising a frame for connecting a vehicle and a first beam arranged in the frame, wherein an inner cavity of the frame is divided into a control cabin for accommodating a circuit component and a battery cabin for accommodating a battery cell component by the first beam; at least one side beam positioned in the width direction of the vehicle in the frame is provided with a vertical face part, a guide part and a mounting part which are connected in sequence, and the vertical face part is connected with the first cross beam; the vertical part and the mounting part are both provided with a cavity, and the guiding part is at least partially arranged obliquely relative to the width and the height directions of the vehicle, so that the mounting part collapses and/or deforms towards the height direction of the vehicle under the action of collision force.
In some embodiments, the guide comprises a ramp; the first end of the inclined rib is connected to the bent edge of the mounting part, the second end of the inclined rib is connected to the joint of the inner reinforcing rib of the vertical surface part and the outer vertical surface, and the height of the first end of the inclined rib is lower than that of the second end of the inclined rib.
In some embodiments, the guide portion further includes two or more corner beads spaced apart in a height direction of the vehicle; the angle bead comprises a horizontal section extending along the width direction of the vehicle and an angle section arranged at an angle with the horizontal section; the horizontal section is connected with the transverse rib of the vertical part, and the bevel section is connected with the transverse rib of the mounting part;
the inclination direction of the bevel section is opposite to the inclination direction of the inclined rib, so that the bottom surface of the elevation part is lower than the bottom surface of the mounting part.
In some embodiments, the frame is polygonal, including more than 3 welded side beams; among two boundary beams connected in the frame, a first boundary beam is provided with a butt joint elevation, and the extension length of the butt joint elevation is not less than the thickness of a second boundary beam; in the assembled state of the two side beams, the butt joint elevation covers the butt joint surface of the second side beam, and the inner elevation of the second side beam covers the butt joint surface of the first side beam.
In some embodiments, a protruding portion is provided on an inner side of one of the two side beams connected in the frame, and a length of the protruding portion is smaller than that of the side beam, so as to avoid a butt joint end of the other side beam.
In some embodiments, the frame structure further comprises a second cross member and a reinforcing connection, the second cross member being located within the battery compartment; the first cross beam and/or the second cross beam are/is connected with the elevation part through the reinforcing connecting piece.
In some embodiments, the reinforcing connector comprises a base and a pin, and the inner side of the vertical surface part is provided with a containing groove; the bottom support is embedded in the accommodating groove and is connected with the elevation part through a fastener; the pin bolts extend into the inner cavities of the first cross beam and/or the second cross beam and are connected with the first cross beam and/or the second cross beam through fasteners.
In a second aspect of the present application, there is provided a battery pack comprising:
the frame structure of the first aspect;
the upper cover is connected with the frame structure and covers an upper opening of the inner cavity of the frame;
the cooling assembly is connected with the frame structure and covers the lower opening of the inner cavity of the frame;
the battery cell assembly is arranged in the battery compartment of the frame structure;
and the circuit component is arranged in the control cabin of the frame structure and is electrically connected with the battery cell component.
In some embodiments, the cooling assembly comprises an upper liquid cooling member and a lower liquid cooling plate, wherein the upper liquid cooling member and the lower liquid cooling plate are distributed on the upper side and the lower side of the battery cell assembly, and the lower liquid cooling plate covers the lower opening of the inner cavity of the frame.
In some embodiments, the cell assembly is disposed in the battery compartment in a compressed state; the high-voltage connecting wire and the low-voltage connecting wire of the battery cell assembly and the circuit assembly are close to the first cross beam.
In some embodiments, the upper cover is connected to the frame structure by a fastener, and a support portion having elasticity is provided on the fastener, so that when the battery pack is mounted on the vehicle, the support portion is supported between the upper cover and the floor of the vehicle body, and the support portion is in contact with the floor.
In some embodiments, a fireproof flame-retardant plate is arranged between the upper cover and the battery cell assembly; and a bottom guard plate is arranged below the lower liquid cooling plate and connected with the frame structure.
In a third aspect of the present application, there is provided a vehicle comprising a vehicle body and the battery pack of the above second aspect, the battery pack being mounted on the vehicle body.
According to the frame structure provided by one or more embodiments of the present application, the inner cavity of the frame is divided into a control cabin and a battery cabin by the first beam, wherein the control cabin is used for accommodating the circuit component, the battery cabin is used for accommodating the battery core component, and the battery cabin and the control cabin are independent and mutually non-interfering and bear different functional attributes. At least one boundary beam of the frame, which is positioned in the Y direction, is provided with a vertical face part, a guide part and a mounting part, wherein the vertical face part is close to the control cabin and the battery cabin and is used as a mounting foundation of other components of the battery pack, and the vertical face part is connected with the first cross beam. The guiding part is positioned between the vertical surface part and the mounting part and plays a role in guiding deformation, one end of the guiding part is connected to the outer vertical surface of the vertical surface part, and the other end of the guiding part is connected to the mounting part. The inside die cavity of mount portion can take place to collapse under the effect of collision force, and under certain circumstances, mount portion also can take place deformation to the direction of height of vehicle under the guiding effect of guiding portion, for example upwards crooked upset or downwarping upset, and the short-time energy release of the in-process absorption, dissipation collision operating mode that can be better satisfies whole car collision and battery package extrusion to the different demands of battery box, effectively protects frame internals.
Drawings
Fig. 1 shows a schematic structural view of a frame structure in one or more embodiments of the application.
Fig. 2 shows a cross-sectional view of the side rail in the frame structure of fig. 1.
Fig. 3 shows a connection structure diagram of two side beams of the frame in the frame structure of fig. 1.
Fig. 4 shows an exploded view of fig. 3.
Fig. 5 shows a structure of a connection structure of the cross beam and the side beam in the frame structure of fig. 1.
Fig. 6 shows an exploded view of fig. 5.
Fig. 7 shows a schematic structural view of the reinforcing connection of fig. 6.
Fig. 8 is a schematic view showing an assembled structure of a battery pack and a vehicle body in one or more embodiments of the present application.
Fig. 9 is a schematic diagram illustrating an assembled structure of a cell assembly and a frame structure of a battery pack according to one or more embodiments of the present application.
Fig. 10 is a schematic diagram showing an assembled structure of a liquid cooling plate and a frame structure of a battery pack according to one or more embodiments of the present application.
Fig. 11 is a schematic view showing an assembled structure of an upper cover, a bottom guard plate and a frame structure of a battery pack according to one or more embodiments of the present application.
Reference numerals illustrate:
100-frame structure, 101-control cabin, 102-battery cabin, 103-mounting hole, 104-line through hole and 105-explosion-proof valve mounting hole; 110-frames, 111-side beams, 112-elevation, 1121-inner ribs of elevation, 1122-receiving grooves, 113-guides, 1131-diagonal ribs, 1132-corner ribs, 11321-horizontal sections, 11322-corner sections, 114-mount, 1141-inner ribs of mount, 1142-bent edges, 115-butt elevation, 116-boss, 117-reinforced connector, 1171-shoe, 1172-cotter, 1173-support; 120-a first beam; 130-a second beam; 140-stringers.
1000-battery pack. 200-cell assembly. 300-upper cover, 301-upper cover mounting hole, 310-fastener, 320-support. 400-cooling assembly, 410-lower liquid cooling plate. 500-bottom guard board.
2000-body, 2100-floor, 2200-sill beam.
Detailed Description
In order to make the present application more clearly understood by those skilled in the art, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In a first aspect of the present application, a frame structure 100 is provided, and the frame structure 100 is applied to a battery pack 1000. Referring to fig. 1, there is shown an overall structure of a frame structure 100, the frame structure 100 includes a frame 110 and a first beam 120 connected to the frame 110, and a mounting hole 103 is provided in the frame 110 for connecting a vehicle to mount a battery pack 1000 on the vehicle. The first cross beam 120 is arranged in the frame 110, the inner cavity of the frame 110 is divided into a control cabin 101 and a battery cabin 102 by the first cross beam 120, the battery cabin 102 and the control cabin 101 are mutually independent and mutually non-interfering, and different functional attributes are born. Wherein the control compartment 101 is used to house circuit components, which may be BMS (battery system) and/or BDU (battery energy distribution unit), and the battery compartment 102 is used to house the battery cell assembly 200, and the battery cell assembly 200 protects several battery cells distributed in matrix, and the type of battery cell is not limited by the present application.
The frame 110 is provided with a line through hole 104 for wiring and an explosion-proof valve mounting hole 105 for mounting an explosion-proof valve. Referring to fig. 1, in some embodiments, the line through holes 104 are located on the beams of the frame 110 near the control cabin 101, the explosion-proof valve mounting holes 105 are located on the front and rear beams of the frame 110, and the explosion-proof valve mounting holes 105 on the beams of the frame 110 near the battery cabin 102 are located near two ends of the beams of the frame 110 to communicate with the ventilation channel formed between the cell assembly 200 and the side beams 140 of the frame 110.
Referring to fig. 8, the battery pack 1000 is typically mounted in or under the chassis of the vehicle, and since the dimension in the longitudinal direction (also referred to as X-direction) of the vehicle is typically greater than the dimension in the width direction (also referred to as Y-direction), upon frontal collision, the collision force is absorbed and dissipated by the front cabin, and the residual collision force is transmitted to the rocker 2200 of the vehicle body 2000, without normally affecting the battery pack 1000. In the case of side impact or side pillar impact, the collision force is transmitted in the Y direction, and the battery pack 1000 is relatively close to the Y-direction boundary of the vehicle body 2000 in the X direction, so that the Y-direction structure of the frame structure 100 needs to be designed with emphasis.
In the frame structure 100 provided in the first embodiment of the present application, at least one side sill 111 of the frame 110 located in the Y direction is provided with a standing surface portion 112, a guiding portion 113 and a mounting portion 114, and the side sill 111 located in the Y direction means the side sill 111 extending in the X direction close to the sill 2200 of the vehicle body 2000. Taking the rectangular frame 110 as an example, the rectangular frame 110 has two stringers 140 in the Y direction, namely a left stringer 140 and a further stringer 140, and at least one of the stringers 140 of the rectangular frame 110 is provided with a standing surface portion 112, a guide portion 113 and a mounting portion 114. The elevation 112 is adjacent to the control cabin 101 and the battery compartment 102, and serves as a mounting base for other components of the battery pack 1000, and the elevation 112 is connected to the first cross member 120. The guide portion 113 is located between the vertical surface portion 112 and the mounting portion 114, and serves to guide deformation, and one end of the guide portion 113 is connected to the outer vertical surface of the vertical surface portion 112, and the other end is connected to the mounting portion 114. In some embodiments, mounting portion 114 is provided with mounting holes 103 for mounting bolts by which battery pack 1000 is mounted to a vehicle.
Referring to fig. 2, a cross-sectional view of the boundary beam 111 is shown. The standing surface portion 112 and the mounting portion 114 are both provided with cavities, and the thin-wall multi-cavity structure can be used as a crumple buffer space. The guide portion 113 is at least partially inclined with respect to the width and height directions (also referred to as Z direction) of the vehicle, when the mounting portion 114 receives the Y-direction collision force, based on the internal cavity of the mounting portion 114, the mounting portion 114 can collapse under the action of the collision force, and in some cases, the mounting portion 114 can deform in the height direction of the vehicle under the guiding action of the guide portion 113, for example, bend upwards or bend downwards, so that the short-time energy release of the collision working condition can be better absorbed and dissipated in the process, and the internal parts of the frame 110 are effectively protected.
In some embodiments, the elevation 112 and the mount 114 are both aluminum alloy extruded structures in the form of thin-walled cavities. In some embodiments, the inner ribs 1121 of the standing surface portion 112 and the inner ribs 1141 of the mounting portion 114 each extend in the width and/or height directions of the vehicle, that is, the interior thereof is partitioned by various lateral/longitudinal reinforcing ribs, so that the profile is divided into a plurality of cavities, which can achieve light weight, and can provide sufficient bending resistance, tensile (compression) resistance, torsion resistance, and ensure sufficient mechanical strength. Since the inner rib 1121 of the vertical portion 112 is a lateral rib (extending in the Y direction) and a longitudinal rib (extending in the Z direction), a large lateral impact can be received. In some embodiments, the thickness of the transverse rib of the vertical portion 112 is greater than that of the transverse rib of the mounting portion 114, so that the mounting portion 114 collapses and absorbs energy when the whole vehicle collides, and the vertical portion 112 is not deformed and does not invade charged parts such as an internal battery cell, thereby ensuring the electric safety of the whole vehicle.
Referring to fig. 2, in some embodiments, the frame 110 is a rectangular frame 110, two side beams 111 of the frame 110 in the Y direction are provided with a vertical portion 112, a guiding portion 113 and a mounting portion 114, and the cross sections of the two side beams 111 are L-shaped. The guide portion 113 and the mounting portion 114 each extend in the X direction to positions corresponding to the control cabin 101 and the battery cabin 102. Referring to fig. 8, two side beams 111 are connected to a sill beam 2200 by mounting bolts, respectively, the l-shaped structure allows the mounting portion 114 to extend under the sill beam 2200 to be connected to the sill beam 2200, and the vertical portion 112 is located inside the sill beam 2200, and a gap is provided between the vertical portion 112 and the inside of the sill beam 2200, which is used to provide a deformation space for the sill beam 2200.
Referring to fig. 2, in some embodiments, the guiding portion 113 includes a diagonal rib 1131, a first end of the diagonal rib 1131 is connected to the bending edge 1142 of the mounting portion 114, and a second end of the diagonal rib 1131 is connected to a connection between the inner stiffener of the facade portion 112 and the facade. By arranging the inclined ribs 1131, the two ends of the inclined ribs 1131 are respectively connected with the connection parts of the rib plates of the mounting part 114 and the vertical surface part 112, so that the side beam 111 is easy to form due to the improvement of the fluidity of materials in the process of heating and extrusion forming by adopting aluminum bars. For the side sill 111 having an L-shaped cross section, the first end of the diagonal rib 1131 is lower in height than the second end, i.e., the diagonal rib 1131 is inclined upward with respect to the mounting portion 114.
Referring to fig. 2, in some embodiments, the guiding portion 113 further includes two or more corner beads 1132 spaced apart along the height direction of the vehicle, the cross section of the corner beads 1132 is in a folded shape, and the number of the folded segments is not limited in the present application. Referring to fig. 2, in some embodiments, the corner bead 1132 includes a horizontal segment 11321 extending in the width direction of the vehicle and a corner segment 11322 disposed at an angle to the horizontal segment 11321. The inclination direction of the bevel section 11322 is opposite to that of the inclined rib 1131, that is, the bevel section 11322 is inclined downwards relative to the mounting part 114, so that the bottom surface of the mounting part 114 is higher than the bottom surface of the elevation part 112, that is, the bottom surface of the elevation part 112 is convex relative to the bottom surface of the mounting part 114, and since the liquid cooling plate and the bottom guard plate 500 of the battery pack 1000 are usually mounted on the elevation part 112, the convex bottom surface of the elevation part 112 can provide enough mounting space for the FDS (hot-melt self-tapping screw) connector (for mounting the liquid cooling plate) and the rivet bolt (for mounting the bottom guard plate 500).
Referring to fig. 2, in some embodiments, the horizontal segment 11321 of the corner bead 1132 is connected to a transverse bead of the facade 112, specifically a connection between the transverse bead and the outer facade; the corner segments 11322 of the corner beads 1132 are connected to the transverse beads of the mounting portion 114, specifically, the connection between the transverse beads and the longitudinal beads or the bending edge 1142 of the mounting portion 114. On the one hand, the connection positions of the ribs are converged at one position, so that the material fluidity is improved and the molding is easy in the process of heating and extrusion molding by adopting the aluminum bars for the edge beam 111. On the other hand, the corner segments 11322 of the corner ribs 1132 are connected to the mounting portion 114, so that the corner segments 11322 have a certain distance from the vertical surface portion 112, and a sufficient deformation space is provided for the mounting portion 114 to be folded upwards and deformed.
The frame 110 is polygonal, and is obtained by welding more than 3 edge beams 111 end to end in sequence. The more common frames 110 are rectangular frames 110 and "rectangular + trapezoidal" frames 110 (rectangular portions for placing the cells and trapezoidal portions for placing the circuit boards). The welds of the two side beams 111 connected in the prior art are generally straight welds, and taking two side beams 111 perpendicular to each other as an example, the butt welds of the two side beams 111 are straight welds inclined by 45 ° with respect to the axial direction. When the frame 110 is made of an aluminum profile, the use of a 45 ° straight weld line can allow the cavities of the two welded side beams 111 to communicate. The edge beams 111 generally need to be machined with holes or grooves, aluminum scraps fall into the cavities of the edge beams 111 in the machining process, and when the aluminum scraps exist in one edge beam 111, the aluminum scraps can move between the cavities of the two edge beams 111 in a large range due to the conduction of the cavities of the two edge beams 111, so that abnormal sound is caused, and the aluminum scraps possibly enter the battery pack 1000 through the holes or grooves of one edge beam 111, so that damage is caused.
In some embodiments, the two side rails 111 connected in the frame 110 employ a fold-line weld. Referring to fig. 3 and fig. 4, in two side beams 111a/b connected in the frame 110, a first side beam 111a is provided with a butt joint elevation 115, the butt joint elevation 115 is formed by continuously extending the outer elevation of the first side beam 111a outwards, and the extending length of the butt joint elevation 115 is not less than the thickness of the second side beam 111b. When the two side beams 111a/b are assembled, the abutting face 115 covers the abutting face N of the second side beam 111b to seal the cavity of the second side beam 111b. The inner vertical surface of the second side beam 111b covers the abutting surface M of the first side beam 111a to seal the cavity of the first side beam 111 a. The inner vertical surfaces of the butt joint vertical surface 115 and the second side beam 111b can naturally form a plugging structure, so that the cavities of the first side beam 111a and the second side beam 111b are mutually isolated and no longer communicated, a good region isolation effect can be achieved on processing residues such as aluminum scraps, and the processing residues are prevented from being transferred in a large range and enter the battery pack 1000.
Taking two side beams 111 perpendicular to each other as an example, referring to fig. 3, a first side beam 111a and a second side beam 111B are welded according to the track a-B-C-D shown in fig. 3, so as to realize the welding and fixing of the first side beam 111a and the second side beam 111B. A fold line weld, which runs a-B-C, is formed on the top surface of the frame 110 and has a longer length than the 45 deg. straight weld in the prior art, and the connection strength between the welded profiles is higher. And the fold line weld joints with the trend of A-B-C are in right angles, when the section bar of the frame 110 is loaded, the load is decomposed from the directions of A, B, B and C respectively, so that the weld joints of different parts bear the load mainly of pulling, pressing and shearing respectively. The load distribution is more reasonable, and the connection is more reliable.
Because the frame 110 and the inner vertical surface of the second side beam 111b can naturally form a plugging structure through the abutting vertical surface 115, the end parts of the profiles are flush, and in some embodiments, a connecting reinforcing structural member can be further arranged at the abutting end of the profiles, and inserted into the cavity of the frame 110 to reinforce the overlapping part of the frame 110. The first side beam 111a and the second side beam 111b may be connected to each other with assistance by caulking or the like at the butt end of the profile.
Referring to fig. 3 and 4, in some embodiments, a protrusion 116 is provided on an inner side of one of the two side beams 111 connected in the frame 110, the protrusion 116 may be used for mounting a bracket structure or a circuit board, for example, a protrusion 116 is provided near an inner side of a side beam of the frame 110 of the control cabin 101, and a mounting bracket of the BMS or the BDU may be mounted on the protrusion 116. The length of the protruding portion 116 is smaller than that of the boundary beam 111, so that the protruding portion 116 forms an avoidance gap with the vertical face portion 112 at the butt joint position, and the butt joint end of the other boundary beam 111 is avoided. When the first side rail 111a is welded to the second side rail 111b, a fold line weld extending in D-E-F is also formed due to the protrusion 116.
To improve the side impact resistance of the frame structure 100, referring to fig. 1, in some embodiments, the frame structure 100 further includes one or more second beams 130, where the second beams 130 are located in the battery compartment 102. The first beam 120, the second beam 130 and the frame 110 beams of the frame 110 clamp the battery cells from the X direction to the two ends together, and form a pre-tightening effect on the battery cells in the battery compartment 102 to inhibit the expansion of the battery cells. The second beam 130 is also provided with a plurality of mounting holes 103 for mounting bolts. In some embodiments, the frame structure 100 further includes one or more stringers 140, the stringers 140 being positioned within the battery compartment 102 and cross-connected with the second cross-beam 130 to divide the battery compartment 102 into a plurality of small spatial areas into which a plurality of cells are grouped and encased.
Referring to fig. 5 and 6, in some embodiments, the first beam 120 and/or the second beam 130 are connected to the vertical surface portion 112 of the side beam 111 extending along the X direction through the reinforcing connection member 117, and the reinforcing connection member 117 extends into the vertical surface portion 112 and the connected first beam 120/second beam 130, and is locked and connected by a fastener, and is connected by welding, in which the connection mode is mainly screwed and secondarily welded, so that the reliability of the connection structure is greatly improved.
Referring to fig. 6 and 7, in some embodiments, the reinforcing connector 117 includes a base 1171 and a pin 1172, the inner side of the facade 112 is provided with a receiving groove 1122, and the base 1171 is embedded in the receiving groove 1122 and connected to the facade 112 by a fastener. The pins 1172 extend into the interior cavity of the first beam 120 and/or the second beam 130 and are connected to the first beam 120 and/or the second beam 130 by fasteners. In some embodiments, the direction of the fastener mounting holes formed in the shoe 1171 and the pin 1172 are different, e.g., the direction of the fastener mounting holes in the shoe 1171 is the Y direction and the direction of the fastener mounting holes in the pin 1172 is the Z direction, which can carry loads in different directions.
Referring to fig. 7, in some embodiments, pin 1172 is a U-shaped plate with a support 1173 disposed in a U-shaped cavity of the U-shaped plate, the support 1173 being disposed in the Z-direction, and a fastener mounting hole of pin 1172 being disposed in the support 1173. In some embodiments, a plurality of U-shaped plates are provided, the plurality of U-shaped plates being spaced apart in the Z-direction, and the open sides of the U-shaped plates being welded to the bottom brackets 1171. The Z-spacing between the U-shaped plates and/or the number of U-shaped plates may be adjusted according to the cavity size of the first beam 120/second beam 130.
Referring to fig. 8, 9, 10 and 11, a battery pack 1000 according to a second aspect of the present application includes the frame structure 100, the upper cover 300, the cooling assembly 400, the battery cell assembly 200 and the circuit assembly according to the first aspect of the present application. The upper cover 300 is connected to the frame structure 100 and covers the upper opening of the inner cavity of the frame 110, and the cooling assembly 400 is connected to the frame structure 100 and covers the lower opening of the inner cavity of the frame 110. The battery cell assembly 200 is arranged in the battery compartment 102 of the frame structure 100; the circuit assembly is disposed in the control cabin 101 of the frame structure 100 and is electrically connected to the battery cell assembly 200.
Referring to fig. 9, in some embodiments, the frame structure 100 further includes one or more second cross members 130 and one or more longitudinal members 140 disposed in the battery compartment 102, and cross-connect with the second cross members 130 to divide the battery compartment 102 into a plurality of small space regions, and a plurality of cells are grouped and loaded into the small space regions. The battery cell assembly 200 is arranged in the battery compartment 102 in a pressed state, and the first beam 120, the second beam 130 and the frame 110 beams of the frame 110 clamp the battery cells from the X direction to the two ends together, so that a pretensioning effect is formed on the battery cells in the battery compartment 102, and the expansion of the battery cells is restrained. The second beam 130 is also provided with a plurality of mounting holes 103 for mounting bolts.
Referring to fig. 9, in some embodiments, by setting the number and the relationship of the series-parallel connection of the battery cell assemblies 200, the same side of the first beam 120 can be implemented to output high and low voltages, that is, the high voltage connection lines and the low voltage connection lines of the battery cell assemblies 200 and the circuit assemblies are close to the first beam 120, so that the high and low voltage connection relationship is established with the distribution box and the BMS in the control cabin 101, the communication and interaction of the low voltage sampling and the high voltage loop are implemented, and the high integration of the local position is implemented.
In some embodiments, the cooling assembly 400 includes a lower liquid cooling plate 410, where the lower liquid cooling plate 410 is a stamped liquid cooling plate, and is generally in a large plane, and the lower liquid cooling plate 410 covers a lower opening of an inner cavity of the frame 110, and after being attached to a bottom plane of the frame structure 100, the lower liquid cooling plate 410 is fixed to the frame 110, the second cross beam 130, and the bottom of the longitudinal beam 140 by FDS (hot-melt self-tapping screw), as shown in fig. 10. Because the lower liquid cooling plate 410 is mounted on the frame structure 100, the whole surface of the lower liquid cooling plate 410 can obtain higher rigidity, and the plane is used as a basic carrier for fixing and pasting the battery cells. Each cell in the cell assembly 200 is adhered to the upper surface of the lower liquid cooling plate 410, and the lower liquid cooling plate 410 supports the cell from the bottom. The whole battery pack 1000 is highly compact in the Z direction, and the integration effect of the battery pack 1000 can be greatly improved.
In some embodiments, the cooling assembly 400 further includes an upper liquid cooling member, which may be a plurality of liquid cooling tubes extending along the X-direction or a plurality of liquid cooling plates extending along a horizontal plane, and the lower liquid cooling member and the lower liquid cooling plate 410 are disposed on the upper and lower sides of the cell assembly 200. In some embodiments, the upper liquid cooling piece is a liquid cooling plate extending along a vertical plane, and the upper liquid cooling piece is located between two adjacent groups of electric cores, so that the side surfaces of the electric cores can be cooled, and the cooling area is larger.
Referring to fig. 11, in some embodiments, a bottom shield 500 is disposed below the lower liquid cooling plate 410, and the bottom shield 500 is connected to the frame structure 100, which may be connected to the vertical surface portion 112 of the frame 110 by rivet bolts. The material strength of the bottom guard plate 500 is greater than that of the lower liquid cooling plate 410, and for example, 1300MPa high-strength steel can be used to protect the lower liquid cooling plate 410.
The water inlet and outlet pipes of the cooling assembly 400 are disposed on the frame structure 100, and in some embodiments, the water inlet and outlet pipes of the cooling assembly 400 are disposed on the side beams of the frame 110 far from the control cabin 101, so as to realize that the high-low voltage outlet wires and the water pipe are disposed on opposite sides of the battery pack 1000, reduce the safety risk of water contacting with the circuit, and facilitate the arrangement of the wires.
Referring to fig. 11, in some embodiments, a plurality of upper cover mounting holes 301 are provided on the upper cover 300 corresponding to the stringers 140 of the frame structure 100 for mounting fasteners 310, and the upper cover 300 is connected to the stringers 140 of the frame structure 100 by the fasteners 310. Mounting holes 103 are also provided on the upper cover 300, corresponding to the positions of the mounting holes 103 on the second beam 130, to mount mounting bolts. In some embodiments, bushings are provided in the mounting holes 301 of the upper cover and/or the mounting holes 103 of the upper cover 300, so that the holes are locally reinforced when the fasteners 310 are installed, and local cracking and breakage of the holes of the upper cover 300 after installation are avoided.
In some embodiments, the upper cover 300 is formed by molding and compounding a continuous long glass fiber fabric with resin, the long glass fiber fabric can provide a higher tensile strength for the upper cover 300 body, and the resin can infiltrate and solidify the glass fiber after being heated and pressurized, so that the upper cover 300 is molded according to the designed and expected morphological characteristics, the molding thickness can be as low as below 1mm, and the density is as low as 2g/cm 3 And the light weight is realized to the greatest extent. In some embodiments, the upper cover 300 is provided with a concave structure and a convex structure, so that the reinforcing structure of the upper cover 300 can integrally raise the natural frequency of the upper cover 300, and the rigidity in a free state is improved.
Referring to fig. 8 and 11, in some embodiments, the fastening member 310 of the upper cover 300 is provided with a supporting portion 320 having elasticity, and the supporting portion 320 may be a supporting block made of an elastic material, or may include a rigid layer and an elastic layer. When the battery pack 1000 is mounted on the vehicle, the support portion 320 is supported between the upper cover 300 and the floor 2100 of the vehicle body 2000, and the support portion 320 is in contact with the floor 2100. The support portion 320 can be filled between the upper cover 300 and the floor 2100 of the vehicle body 2000 in a compressed state, and thus can effectively support the floor 2100 of the vehicle body 2000.
In some embodiments, a fire-resistant and flame-retardant plate, such as a mica plate, is disposed between the upper cover 300 and the cell assembly 200. The fire-retardant panel may be a single piece panel or a plurality of panels corresponding to small spatial areas within the battery compartment 102.
In a third aspect of the present application, there is provided a vehicle including a vehicle body and the battery pack 1000 according to the second aspect of the present application, wherein the battery pack 1000 is mounted on the vehicle body 2000, and the battery pack 1000 may be integrated in a chassis of the vehicle body 2000 or mounted under the floor 2100.
Referring to fig. 8, in some embodiments, two side rails 111 of the battery pack 1000 extending in the X-direction are connected to a threshold beam 2200 by mounting bolts, respectively, a mounting portion 114 of the side rail 111 extends under the threshold beam 2200 to be connected to the threshold beam 2200, and a standing portion 112 is located inside the threshold beam 2200, and a gap is provided between the standing portion 112 and the inside of the threshold beam 2200 for providing a deformation space for the threshold beam 2200. The second cross member 130 of the battery pack 1000 is also provided with a mounting bolt, and the second cross member 130 is connected to the floor 2100 of the vehicle body 2000 by the mounting bolt.
In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" indicate orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and 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 therefore should not be construed as limiting the present application.
In the present application, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the application, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. The frame structure comprises a frame for connecting a vehicle and a first cross beam arranged in the frame, wherein the inner cavity of the frame is divided into a control cabin for accommodating a circuit assembly and a battery cabin for accommodating a battery core assembly through the first cross beam; the method is characterized in that:
at least one side beam positioned in the width direction of the vehicle in the frame is provided with a vertical face part, a guide part and a mounting part which are connected in sequence, and the vertical face part is connected with the first cross beam; the vertical part and the mounting part are both provided with a cavity, and the guiding part is at least partially arranged obliquely relative to the width and the height directions of the vehicle, so that the mounting part collapses and/or deforms towards the height direction of the vehicle under the action of collision force.
2. The frame structure of claim 1, wherein the guide portion comprises a diagonal rib; the first end of the inclined rib is connected to the bent edge of the mounting part, the second end of the inclined rib is connected to the joint of the inner reinforcing rib of the vertical surface part and the outer vertical surface, and the height of the first end of the inclined rib is lower than that of the second end of the inclined rib.
3. The frame structure according to claim 2, wherein the guide portion further includes two or more corner beads provided at intervals in a height direction of the vehicle; the angle bead comprises a horizontal section extending along the width direction of the vehicle and an angle section arranged at an angle with the horizontal section; the horizontal section is connected with the transverse rib of the vertical part, and the bevel section is connected with the transverse rib of the mounting part;
the inclination direction of the bevel section is opposite to the inclination direction of the inclined rib, so that the bottom surface of the elevation part is lower than the bottom surface of the mounting part.
4. A frame structure according to any one of claims 1 to 3, wherein the rim is polygonal and comprises more than 3 welded side beams; among two boundary beams connected in the frame, a first boundary beam is provided with a butt joint elevation, and the extension length of the butt joint elevation is not less than the thickness of a second boundary beam; in the assembled state of the two side beams, the butt joint elevation covers the butt joint surface of the second side beam, and the inner elevation of the second side beam covers the butt joint surface of the first side beam.
5. The frame structure of claim 4, wherein a protruding portion is provided on an inner side of one of two side beams connected in the frame, and a length of the protruding portion is smaller than that of the side beam, so as to avoid a butt joint end of the other side beam.
6. A frame structure as claimed in any one of claims 1 to 3, further comprising a second cross member and reinforcing connectors, the second cross member being located within the battery compartment; the first cross beam and/or the second cross beam are/is connected with the elevation part through the reinforcing connecting piece.
7. The frame structure of claim 6, wherein the reinforcing connection member includes a bracket and a pin, and the inner side of the standing surface portion is provided with a receiving groove; the bottom support is embedded in the accommodating groove and is connected with the elevation part through a fastener; the pin bolts extend into the inner cavities of the first cross beam and/or the second cross beam and are connected with the first cross beam and/or the second cross beam through fasteners.
8. A battery pack, comprising:
the frame structure of any one of claims 1-7;
the upper cover is connected with the frame structure and covers an upper opening of the inner cavity of the frame;
the cooling assembly is connected with the frame structure and covers the lower opening of the inner cavity of the frame;
the battery cell assembly is arranged in the battery compartment of the frame structure;
and the circuit component is arranged in the control cabin of the frame structure and is electrically connected with the battery cell component.
9. The battery pack according to claim 8, wherein the cooling assembly comprises an upper liquid cooling member and a lower liquid cooling plate, the upper liquid cooling member and the lower liquid cooling plate are distributed on the upper side and the lower side of the electric core assembly, and the lower liquid cooling plate covers a lower opening of an inner cavity of the frame;
the battery cell assembly is arranged in the battery compartment in a pressed state; the high-voltage connecting wire and the low-voltage connecting wire of the battery cell assembly and the circuit assembly are close to the first cross beam;
the upper cover is connected with the frame structure through a fastener, and an elastic supporting part is arranged on the fastener, so that when the battery pack is installed on a vehicle, the supporting part is supported and arranged between the upper cover and the floor of the vehicle body, and the supporting part is in contact with the floor;
a fireproof flame-retardant plate is arranged between the upper cover and the battery cell assembly; and a bottom guard plate is arranged below the lower liquid cooling plate and connected with the frame structure.
10. A vehicle comprising a vehicle body and the battery pack according to claim 8 or 9, the battery pack being mounted on the vehicle body.
CN202310902208.1A 2023-07-21 2023-07-21 Frame construction, battery package and vehicle Pending CN117039299A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310902208.1A CN117039299A (en) 2023-07-21 2023-07-21 Frame construction, battery package and vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310902208.1A CN117039299A (en) 2023-07-21 2023-07-21 Frame construction, battery package and vehicle

Publications (1)

Publication Number Publication Date
CN117039299A true CN117039299A (en) 2023-11-10

Family

ID=88634527

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310902208.1A Pending CN117039299A (en) 2023-07-21 2023-07-21 Frame construction, battery package and vehicle

Country Status (1)

Country Link
CN (1) CN117039299A (en)

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