CN114571976A - Integrated structure of automobile body and battery package under integrated electric automobile - Google Patents

Integrated structure of automobile body and battery package under integrated electric automobile Download PDF

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Publication number
CN114571976A
CN114571976A CN202210158050.7A CN202210158050A CN114571976A CN 114571976 A CN114571976 A CN 114571976A CN 202210158050 A CN202210158050 A CN 202210158050A CN 114571976 A CN114571976 A CN 114571976A
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China
Prior art keywords
integrated
battery pack
vehicle body
plate
cross
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Granted
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CN202210158050.7A
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Chinese (zh)
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CN114571976B (en
Inventor
段利斌
周华锦
杜展鹏
江浩斌
刘星
徐伟
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Jiangsu University
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Jiangsu University
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Publication of CN114571976A publication Critical patent/CN114571976A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/20—Floors or bottom sub-units
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Abstract

The invention provides an integrated structure of an integrated electric automobile lower automobile body and a battery pack, which comprises an integrated automobile body floor, a lower automobile body and a battery pack lower box body, wherein the integrated automobile body floor comprises an integrated floor and a seat beam assembly, and has the functions of installing a seat, bearing passengers and serving as an upper cover of the battery pack; the integrated floor is connected with the lower vehicle body through a hollow double-thread bolt, and two ends of the seat cross beam assembly are connected with a threshold beam of the lower vehicle body through connecting joints; the lower box body of the battery pack is connected with the lower vehicle body through a hollow double-thread bolt and is connected with the seat beam assembly through a middle lifting lug; the lower box body of the battery pack is connected with the battery core through a filling material. The integrated structure provided by the invention can realize high integration of the lower vehicle body and the battery pack, is beneficial to reducing the weight of the whole vehicle, and improves the volume utilization rate and the energy density of the battery pack, thereby improving the endurance mileage of the electric vehicle.

Description

Integrated structure of automobile body and battery package under integrated electric automobile
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to an integrated structure integrating a lower automobile body of an electric automobile and a battery pack.
Background
With the development of new energy automobile technology, the requirement of consumers on the endurance mileage of electric automobiles is higher and higher. The performance of the battery pack is taken as an important factor influencing the endurance mileage of the electric automobile, and how to improve the performance of the battery pack is a key point of attention of automobile and battery manufacturers. In order to achieve the purpose of long endurance mileage of the electric vehicle, the specific energy density of the battery pack needs to be improved as much as possible on the premise of ensuring the protection safety of the battery cell in a limited space, and the improvement of the specific energy density of the battery pack is mainly considered from two aspects of reducing the weight of a box body of the battery pack and improving the volume utilization rate of the box body.
For improving the volume utilization rate of the battery pack case, the size of the battery module can be continuously optimized from the initial 355 module to the 390 module to the later 590 module by optimizing the size of the battery module, and the volume utilization rate of the battery pack case is higher and higher. Along with the development of power battery technique, the volume of single battery is bigger and bigger, the shape is more and more diversified to CTP battery package (Cell to PACK, electric core direct integration has been developed into the battery package), has realized electric core direct mount in battery package box, has reduced the spare part quantity of box, has further improved the volume utilization of battery package box.
In the related art, most power battery packs of new energy automobiles are provided with complete upper covers and lower boxes, the upper covers and the lower boxes form a closed box structure for accommodating battery cores, the closed box structure is installed as an independent part and used as an automobile body, the structure leads redundant design to exist between the power battery packs and the automobile body, and the lifting space for the light weight and the volume utilization rate of the power battery packs is limited.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an integrated structure integrating a lower automobile body of an electric automobile and a battery pack, which increases the volume utilization rate of the battery pack and reduces the weight of the whole automobile.
The present invention achieves the above-described object by the following technical means.
An integrated structure of an integrated electric automobile lower body and a battery pack comprises:
the integrated vehicle body floor is formed by sequentially connecting an upper reinforcing plate, an integrated floor and a lower reinforcing plate into a whole from top to bottom; the integrated floor is provided with a plurality of seat cross beams at the positions corresponding to the installation positions of the automobile seats, and the cross sections of the seat cross beams and the upper reinforcing plate in the length direction of the automobile body are the same in shape; the seat beam assembly is formed by the seat beam, the upper reinforcing plate and the lower reinforcing plate; the two ends of the seat beam assembly are respectively provided with a connecting joint;
the battery pack lower box comprises a lower box frame, an inclined cable device, a middle lifting lug, a liquid cooling system and a bottom protection plate, wherein the liquid cooling system and the lower box frame are matched to form an open cavity for accommodating a battery cell; the lower box body frame is connected with the integrated vehicle body floor; the middle lifting lug is connected with the first cross beam and the seat cross beam assembly;
the integrated vehicle body floor is connected with the floor connecting face of the lower vehicle body, and the integrated vehicle body floor is matched with the lower box body of the battery pack to form a sealing cavity for accommodating the battery core.
In the technical scheme, the connecting joint comprises a joint, a reinforcing connecting plate and a vehicle body connecting plate, wherein the reinforcing connecting plate is connected with the joint connecting surface of the vehicle body connecting plate; one end of the joint is a first cross-section beam in a shape like a Chinese character 'ri', the other end of the joint is a first cross-section beam in a shape like a Chinese character 'ri', the upper end of the first cross-section beam in the shape like a Chinese character 'ri' is connected with the upper reinforcing plate, the side edge of the first cross-section beam in the shape like a Chinese character 'ri' is connected with the joint connecting surface of the vehicle body connecting plate, and the inclined edge of the first cross-section beam in the shape like a Chinese character 'ri' is connected with the end surface of the seat cross beam; the reinforced connecting plate is provided with a connecting plate which has the same section shape with the upper reinforcing plate in the length direction of the vehicle body, and the connecting plate is connected with the upper reinforcing plate; the upper ends of the first cross-section beam shaped like a Chinese character 'ri' and the first cross-section beam shaped like a Chinese character 'C' are connected with the upper reinforcing plate.
In the technical scheme, the lower box body frame is formed by splicing a Z-shaped frame and a square beam; the Z-shaped frame is formed by connecting a second C-shaped section beam, a second B-shaped section beam and a second U-shaped section beam in sequence from the outer side to the inner side of the lower box body of the battery pack; the upper connecting surface and the lower connecting surface of the second C-shaped section beam are provided with through holes for matching with the hollow double-thread bolt; the bottom of the beam with the second cross section shaped like a Chinese character 'ri' is provided with a bottom guard plate connecting surface which is used for being connected with a bottom guard plate in a matching way; and the second mouth-shaped section beam is provided with a liquid cooling system connecting surface for connecting with a liquid cooling system.
In the technical scheme, the lower box body of the battery pack is connected with the integrated vehicle body floor through a hollow double-thread bolt, the hollow double-thread bolt is of a two-section concentric cylindrical hollow structure, and a first step is formed at the joint of the two sections of cylinders; two sections of concentric cylinders include first cylinder and second cylinder, and first cylinder outer cylinder face is equipped with first external screw thread, and the inner cylinder face is equipped with first internal thread, and second cylinder bottom is equipped with seal groove A and hexagon counter sink.
Among the above-mentioned technical scheme, the halyard device includes two turnbuckles, four lifting hooks, two eyebolts, an eyenut and bracket, constitutes the halyard after a turnbuckle both ends are connected with a lifting hook cooperation respectively, and the one end and the eyebolt of halyard are connected, and the other end and the eyenut are connected, and the eyenut bottom is connected with the bracket cooperation.
In the technical scheme, the middle lifting lug comprises a T-shaped nut, a sealing ring B, a supporting block, a sleeve, a sealing ring C and a flange bolt A; the T-shaped nut is connected with the flange bolt A in a matched manner; the supporting block is of a cylindrical structure with a countersunk through hole in the center, and the countersunk through hole is used for being matched with the sleeve; the sleeve is of a hollow stepped shaft structure, a second step of the sleeve is connected with the supporting block, a sealing groove C is formed in the bottom of the sleeve and used for mounting the sealing ring C, and a through hole J is formed in the sleeve and used for being matched with the flange bolt A.
In the technical scheme, the integrated floor is provided with the plurality of reinforcing ribs A in the height direction of the battery pack, and the lower reinforcing plate is provided with the plurality of reinforcing ribs B at the position corresponding to the seat beam.
In the technical scheme, the plurality of battery cells are arranged in the opening cavity, a gap is reserved between each battery cell and the opening cavity, and the gap is poured with the filling material.
In the technical scheme, the gap is internally provided with the embedded pipe, and when the filling material is poured, a cavity is formed at the embedded pipe.
In the technical scheme, the integrated floor, the upper reinforcing plate, the lower reinforcing plate, the reinforcing connecting plate and the bottom guard plate are all formed by processing composite materials or metal materials or mixed materials.
The invention has the beneficial effects that:
(1) the integrated vehicle body floor is connected with the floor connecting surface of the lower vehicle body and is matched with the lower box body of the battery pack to form a sealed cavity for containing a battery core, the integrated vehicle body floor is sequentially connected into a whole from top to bottom by an upper reinforcing plate, an integrated floor and a lower reinforcing plate, a seat beam arranged on the integrated floor, the upper reinforcing plate and the lower reinforcing plate form a seat beam assembly, and connecting joints are assembled at two ends of the seat beam assembly; through the design, the integration of the lower vehicle body and the battery pack is realized, the redundant design between the power battery pack and the vehicle body is reduced, and the number of parts of the vehicle body is reduced, so that the volume utilization rate of the battery pack is increased, and the weight of the whole vehicle is reduced.
(2) The invention fully utilizes the advantages of the composite material and the metal material, realizes the integration of the floor of the vehicle body, the seat cross beam and the upper cover of the battery pack through the composite use of the composite material and the metal material, reduces the number of parts of the vehicle body, and can form the seat cross beam parts with different cross section shapes through different combinations of the seat cross beams, the upper reinforcing plate and the lower reinforcing plate in different structural forms so as to meet the requirements of different vehicle types.
(3) The connecting joint in the structure optimizes the connection between the seat beam assembly and the threshold beam, reduces the influence of the stress of the seat beam assembly on the lower box body of the battery pack, and improves the side collision performance of the vehicle body.
(4) The hollow double-thread bolt and the middle lifting lug in the structure can enhance the structural strength of the joint of the lower box body of the battery pack and the lower vehicle body of the vehicle body, and facilitate the disassembly and the assembly of the lower box body of the battery pack, so that the battery pack has good maintainability.
(5) The inclined cable device in the structure can be used for reducing or replacing the arrangement of the cross beam of the lower box body of the battery pack, is beneficial to improving the volume utilization rate of the box body of the battery pack and effectively reducing the deformation of a liquid cooling system after stress.
(6) The battery core in the structure of the invention is connected with the lower box body of the battery pack through the filling material, so that the direct connection between the battery core and the battery pack is realized, the concept of a module in the traditional installation form is eliminated, the assembly process is simplified, the number of parts of the lower box body of the battery pack is reduced, and the light weight of the lower box body of the battery pack is favorably realized and the volume utilization rate of the lower box body is improved.
(7) The arrangement of the battery cells in the lower box body of the battery pack in the structure is flexible, the battery pack is suitable for the battery cells with different shapes and sizes, and the mixed arrangement of the battery cells with different specifications can be realized.
(8) The filling material in the structure of the invention enables the battery core and the lower box body of the battery pack to be connected into a whole, thereby effectively improving the strength, rigidity, torsion resistance, shearing resistance and other properties of the battery pack.
Drawings
FIG. 1 is an exploded view of an integrated structure of a lower body and a battery pack of an integrated electric vehicle according to the present invention;
FIG. 2 is an exploded view of the integrated vehicle body floor according to the present invention;
FIG. 3 is a partial cross-sectional view of the integrated vehicle body floor of the present invention;
FIG. 4(a) is a schematic view of the structure of the integrated floor of the present invention;
FIG. 4(b) is a bottom view of the one-piece flooring of the present invention;
FIG. 5 is a schematic view of the upper stiffener structure according to the present invention;
FIG. 6 is a schematic view of a lower stiffener structure according to the present invention;
FIG. 7(a) is a first cross-sectional view of a seat beam assembly according to the present invention;
FIG. 7(b) is a second cross-sectional view of the seat beam assembly of the present invention;
FIG. 7(c) is a third cross-sectional view of the seat beam assembly of the present invention;
FIG. 8 is a schematic view of the construction of the connector of the present invention;
FIG. 9 is a schematic view of the reinforced connecting plate of the present invention;
FIG. 10(a) is an isometric view of a joint according to the present invention;
FIG. 10(b) is a front view of the joint of the present invention;
FIG. 11 is a schematic view of a hollow double-threaded bolt according to the present invention;
FIG. 12 is a schematic view of the seat beam assembly of the present invention in assembled relation with the connection fitting;
FIG. 13 is a schematic view illustrating an assembly relationship between the integrated vehicle body floor and the lower vehicle body according to the present invention;
FIG. 14 is a schematic view of a lower case of the battery pack according to the present invention;
FIG. 15 is a schematic view of the lower case frame of the present invention;
FIG. 16(a) is an isometric view of a bezel of the present invention having an outer profile shape of "Z";
FIG. 16(b) is a cross-sectional view of the frame of the present invention in which the outer contour is "Z" -shaped;
FIG. 17 is a schematic view of a cross beam structure of the present invention having an outer contour shaped like a Chinese character 'kou';
FIG. 18 is a schematic structural view of the skew cable assembly of the present invention;
FIG. 19 is a schematic view of the bracket structure of the present invention;
figure 20 is a schematic view of the intermediate lifting lug structure according to the present invention;
FIG. 21 is a schematic structural view of a T-nut according to the present invention;
FIG. 22 is a schematic view of the support block structure of the present invention;
FIG. 23 is a schematic view of the sleeve of the present invention;
FIG. 24(a) is an exploded view of a liquid cooling system according to the present invention;
FIG. 24(b) is a top view of the lower liquid cold plate according to the present invention;
FIG. 25 is a schematic view of the bottom guard structure of the present invention;
FIG. 26 is a schematic view of the liquid cooling system, bottom protective plate and polygonal frame structure of the present invention;
FIG. 27(a) is an assembly view of the liquid cooling system, the bottom protective plate and the second cross member according to the present invention;
FIG. 27(b) is an assembly view of the liquid cooling system, the bottom plate and the first beam of the present invention;
FIG. 28(a) is a schematic view of the assembly of the middle portion of the skew cable assembly with a liquid cooling system in accordance with the present invention;
FIG. 28(b) is a schematic view of the assembly of the two ends of the cable assembly to the first cross member in accordance with the present invention;
fig. 29(a) is an isometric view of an embodiment of a battery pack lower case mounted cell according to the invention;
fig. 29(b) is a cross-sectional view of a battery pack lower case mounted with cells according to an embodiment of the invention;
fig. 30(a) is an exploded view of a second embodiment of a battery cell mounted in a lower case of a battery pack according to the present invention;
fig. 30(b) is a second cross-sectional view of an embodiment of a battery pack lower case mounting electric core according to the invention;
FIG. 31(a) is a cross-sectional view of the first cross member and seat cross member assembly of the present invention assembled;
FIG. 31(b) is an enlarged fragmentary view A of a cross-sectional view of the assembly of the first cross member with the seat cross member assembly in accordance with the present invention;
FIG. 31(c) is an enlarged fragmentary view B of a cross-sectional view of the first cross member and seat cross member assembly of the present invention assembled;
FIG. 32(a) is a schematic view of the assembly of the polygonal frame structure with the integrated underbody panel according to the present invention;
fig. 32(b) is a partially enlarged view showing the assembly of the polygonal frame structure with the integrated underbody panel according to the present invention.
Wherein: 100-integrated vehicle body floor, 101-seat beam assembly, 110-upper reinforcing plate, 111-through hole P, 120-connecting joint, 121-vehicle body connecting plate, 122-reinforcing connecting plate, 123-joint, 124-vehicle body connecting surface, 125-joint connecting surface, 1221-flanging, 1222-connecting plate, 1241-first cross-section beam in shape of Chinese character 'ri', 1242-first cross-section beam in shape of Chinese character 'C', 1245-first right-angle edge, 1246-second right-angle edge, 1247-oblique edge, 130-vehicle body sealing gasket, 140-integrated floor, 141-electrical cabinet, 142-seat beam, 143-flange edge A, 144-through hole A, 145-reinforcing rib B, 146-seat beam end surface, 147-through hole B, 150-lower reinforcing plate, 151-flange edge B, 152-through hole C, 153-reinforcing rib B, 154-through hole D, 160-battery pack lower box body sealing gasket, 200-battery pack lower box body, 210-lower box body frame, 211-first frame, 2110-liquid cooling system connecting surface, 2111-second C-shaped section beam, 2112-second I-shaped section beam, 2113-second I-shaped section beam, 2114-rivet nut mounting hole, 2115-C-shaped section beam upper connecting surface, 2116-through hole G, 2117-C-shaped section beam lower connecting surface, 2118-through hole H, 2119-bottom protection plate connecting surface, 212-second frame, 213-third frame, 214-fourth frame, 215-first beam, 216-second beam, 217-edge frame structure, 218-beam connecting joint, 219-through hole I, 220-liquid cooling system, 221-upper liquid cooling plate, 222-lower liquid cooling plate, 223-water outlet pipe, 224-water inlet pipe, 225-water outlet pipe, 226-water inlet pipe, 227-through hole K, 228-through hole L, 229-flow channel, 2210-through hole M, 2211-through hole N, 2212-flange edge D, 230-bottom guard plate, 231-reinforcing rib C, 232-boss, 234-through hole O, 235-flange edge C, 240-hot melting self-tapping, 250-middle lifting lug, 251-T type nut, 2511-bottom plate B, 2512-hollow cylinder, 2513-second internal thread, 252-sealing ring B, 253-supporting block, 2531-sealing groove B and 2532-connecting surface on supporting block, 2533-countersunk through hole, 2535-lower connecting surface of supporting block, 254-sleeve, 2541-through hole J, 2542-second step, 2543-third step, 2544-sealing groove C, 2545-bottom connecting surface of sleeve, 255-sealing ring C, 256-flange bolt A, 257-sealing ring A, 258-flange bolt B, 260-inclined cable device, 261-basket bolt, 262-lifting hook, 263-lifting eye screw, 264-lifting eye nut, 265-bracket, 266-inclined cable, 2651-cylinder A, 2652-bottom plate A, 2653-second external thread, 270-rivet nut, 300-lower vehicle body, 301-front lower vehicle body, 302-sill beam, 304-rear lower vehicle body, 400-welding bolt, 500-hollow double-thread bolt A, 501-a first step, 502-a first external thread, 503-a first internal thread, 504-a through hole E, 505-a hexagonal counter bore, 506-a sealing groove A, 507-a second cylinder, 508-a first cylinder, 600-an electric core, 700-a filling material, 800-a pre-buried pipe and 900-a cavity.
Detailed Description
The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.
Fig. 1 is an integrated structure of a lower vehicle body and a battery pack of an integrated electric vehicle, which comprises a lower vehicle body 300 and a lower battery pack box 200, wherein the lower battery pack box 200 is located below the lower vehicle body 300; the lower vehicle body 300 comprises a front lower vehicle body 301, a rear lower vehicle body 304 and threshold beams 302, wherein the front lower vehicle body 301 is positioned at the front end of the lower vehicle body 300, the rear lower vehicle body 304 is positioned at the rear end of the lower vehicle body 300, and the front lower vehicle body 301 is connected with the rear lower vehicle body 304 through the two threshold beams 302; as shown in fig. 32(a), the edge of the integrated vehicle body floor 100 is connected to the floor connection surface of the lower vehicle body 300 by a hollow double-thread bolt 500, and a vehicle body gasket 130 (fig. 2) is provided at the connection position of the integrated vehicle body floor 100 and the lower vehicle body 300, for ensuring the air tightness of the lower vehicle body 300; the polygonal frame structure 217 of the battery pack lower box body 200 is provided with a plurality of through holes G2116 and H2118, and is connected with the integrated vehicle body floor 100 through flange bolts B258 after being matched with the hollow double-thread bolts 500; the integrated vehicle body floor 100 has the function of an upper cover of a battery pack, and forms a sealed cavity for accommodating a battery cell after being matched with the lower box body 200 of the battery pack; the integrated vehicle body floor 100 has the characteristics of insulation, high temperature resistance and the like, and can effectively protect the safety of passengers.
As shown in fig. 2 and 3, which are schematic views of the structure of the integrated vehicle body floor, the integrated vehicle body floor 100 includes three major parts, namely, an integrated floor 140, an upper reinforcing plate 110, and a lower reinforcing plate 150, wherein the upper reinforcing plate 110, the integrated floor 140, and the lower reinforcing plate 150 are sequentially arranged from top to bottom and are connected together by welding or structural adhesive. The integrated vehicle body floor 100 integrates the functions of a vehicle body floor, a seat cross beam and a battery pack upper cover, reduces the redundant design between the battery pack and the vehicle body, and improves the volume utilization rate of the vehicle body space.
The integrated floor 140 is made of composite material, metal material or mixed material (formed by mixing two different materials), and as shown in fig. 4(a), the integrated floor 140 is provided with a plurality of seat beams 142 at positions corresponding to the positions where the automobile seats are installed, for installing the automobile seats; an electrical appliance bin 141 is arranged at the rear part of the integrated floor 140 and used for containing electrical appliances; a plurality of reinforcing ribs A145 are arranged in the height direction of the battery pack and used for improving the structural performance; the flange edge A143 is arranged on the edge, and the flange edge A143 is provided with a plurality of through holes A144 which are used for being connected with the lower vehicle body 300 after being matched with the hollow double-thread bolt 500; the bottom of the seat cross member 142 is provided with a through hole B147 (fig. 4(B)) for mounting a T-nut 251.
The upper reinforcing plate 110 is formed by processing a composite material, a metal material or a mixed material; the cross-sectional shapes of the upper reinforcing plate 110 and the seat cross member 142 in the vehicle body length direction are the same, and the upper reinforcing plate and the seat cross member can be attached and connected through welding or structural adhesive; as shown in fig. 5, the upper reinforcing plate 110 is provided with a through hole P111 for mounting a T-nut 251.
The lower reinforcing plate 150 is formed by processing materials such as composite materials, metal materials or mixed materials; the cross-sectional shapes of the lower reinforcement plate 150 and the integrated floor panel 140 in the vehicle width direction are the same, and the two can be bonded; as shown in fig. 6, a plurality of reinforcing ribs B153 are disposed at positions of the lower reinforcing plate 150 corresponding to the seat cross member 142, for enhancing the structural strength of the lower reinforcing plate 150; the two ends of the lower reinforcing plate 150 are provided with flange edges B151, the flange edges B151 are provided with through holes C152 which are concentric with the through holes A144, and the flange edges B151 are used for being connected with a lower vehicle body 300 through the hollow double-thread bolts 500, so that borne force is dispersed to the vehicle body, and the structural performance of the seat cross beam assembly is enhanced; the lower reinforcing plate 150 is provided with a through hole D154 for mounting the T-nut 251.
The seat cross beam 142, the upper reinforcing plate 110 and the lower reinforcing plate 150 form a seat cross beam assembly 101 (fig. 1) with a closed cross section, and the seat cross beam assemblies 101 with different cross section shapes can be formed by different combinations of the seat cross beam 142, the upper reinforcing plate 110 and the lower reinforcing plate 150 in different structural forms so as to meet the requirements of different vehicle types; fig. 7(a), (b), and (c) show three cross-sectional shapes of the seat cross member assembly, which are merely schematic, and the seat cross member assembly of the present invention is not limited to the three cross-sectional shapes.
As shown in fig. 2, both ends of the seat cross member assembly 101 are equipped with the connection joints 120, and as shown in fig. 8, the connection joints 120 include three parts, i.e., a joint 123, a reinforcing connection plate 122, and a body connection plate 121.
As shown in fig. 9, the reinforcing connecting plate 122 is made of composite material, metal material or mixed material; the reinforcing connecting plate 122 is provided with a connecting plate 1222, the cross-sectional shape of the connecting plate 1222 and the cross-sectional shape of the upper reinforcing plate 110 in the vehicle length direction are the same, and the connecting plate 1222 and the upper reinforcing plate 110 can be completely attached; the reinforcing link 122 is provided with a flange 1221 for connection with the joint connection surface 125 of the vehicle body link 121.
The joint 123 is a beam with the outer contour of a right triangle and a multi-cell structure inside, and can be processed by a rolling process, an aluminum profile or a casting process and the like; the joint 123 shown in fig. 10(a) has one end of a first "r" section beam 1241 and the other end of a first "C" section beam 1242, and the section shape of the joint can be adjusted to meet different structural performance requirements; as shown in fig. 10(b), the joint 123 is provided with a first leg 1245 for connection with the upper gusset 110, the joint 123 is provided with a leg 1247 for connection with the seat cross member end 146, and the joint 123 is provided with a second leg 1246 for connection with the joint connection surface 125 of the vehicle body attachment panel 121.
The hollow double-thread bolt 500 is made of aluminum alloy, steel or cast iron; as shown in fig. 11, the hollow double-thread bolt 500 is a two-section concentric cylindrical hollow structure, the outer diameter of the first cylinder 508 is smaller than that of the second cylinder 507, and a first step 501 is formed at the joint of the two sections of cylinders for matching and connecting with the flange a143 of the integrated floor 140 and the flange B151 of the lower reinforcing plate 150; a first external thread 502 is arranged on the outer cylindrical surface of the first cylinder 508, a first internal thread 503 is arranged on the inner cylindrical surface, and a sealing groove A506 is arranged at the bottom of the second cylinder 507 and used for installing a sealing ring A257; the bottom of the second cylinder 507 is provided with a hexagonal counter bore 505 for assembling the hollow double-threaded bolt 500.
As shown in fig. 12, the first right-angle edge 1245 of the joint 123 is connected to the lower surface of the end of the upper reinforcing plate 110 by welding or structural adhesive; the bevel edge 1247 of the joint 123 is connected with the seat beam end face 146 through structural adhesive; the second right-angle side 1246 of the joint 123 is connected with the joint connecting surface 125 of the vehicle body connecting plate 121 through welding or structural adhesive; the connecting plate 1222 of the reinforcing connecting plate 122 is attached to the upper surface of the end of the upper reinforcing plate 110 from top to bottom and then connected by welding or structural adhesive; the flange 1221 of the reinforcing connecting plate 122 is connected to the joint connecting surface 125 of the vehicle body connecting plate 121 by welding or structural adhesive.
As shown in fig. 13, the lower body 300 is provided with a plurality of welding bolts 400 at the corresponding connection positions of the integrated body floor 100, and after the connection between the integrated floor 140 and the lower body 300 is matched with the through hole a144 through the first step 501, the first external threads 502 are detachably and fixedly connected with the welding bolts 400; after the seat cross beam assembly 101 is connected with the lower vehicle body 300 and matched with the through hole A144 and the through hole C152 through the first step 501, the first external thread 502 is detachably and fixedly connected with the welding bolt 400; one end of the connecting joint 120 is connected with the seat cross beam assembly 101, the other end is connected with the threshold beam 302, and the vehicle body connecting surface 124 of the vehicle body connecting plate 121 is connected with the threshold beam 302 through welding or structural adhesive; a body gasket 130 is installed between the lower body 300 and the flange a143 of the integrated floor for securing airtightness of the lower body. The connecting joint 120 optimizes the connection between the seat cross beam assembly 101 and the threshold beam 302, reduces the influence of the stress of the seat cross beam assembly 101 on the lower box body 200 of the battery pack, and improves the side collision performance of the vehicle body.
As shown in fig. 14, the battery pack lower case 200 includes five major parts, namely, a lower case frame 210, a stay device 260, an intermediate lifting lug 250, a liquid cooling system 220 and a bottom guard plate 230; the liquid cooling system 220 and the lower box frame 210 form an open cavity for accommodating the battery cell after being matched; the two ends of the inclined cable device 260 are connected with the lower box frame 210, and the middle of the inclined cable device is connected with the liquid cooling system 220, so as to reduce the deformation of the liquid cooling system 220 after being stressed; the edge of the bottom guard plate 230 is provided with a flange edge C235 (figure 25) for connecting with the lower box body frame 210; the frame around the lower box body frame 210 is provided with a plurality of through holes G2116 and H2118 which are matched with the hollow double-thread bolt 500 and then connected with the integrated vehicle body floor 100 through a flange bolt B258; the center lug 250 is used to connect the first beam 215 to the seat beam assembly 101.
As shown in fig. 15, the lower box frame 210 is formed by splicing six side frames with a Z-shaped outer contour and two cross beams with a square outer contour; the inner parts of the frame with the Z-shaped outer contour shape and the beam with the square-shaped outer contour shape are of a multi-cell structure and can be processed and formed by roll bending, extrusion, casting, welding and other processes; the specific six frames with the Z-shaped outer contour shape comprise two first frames 211, two second frames 212, a third frame 213 and a fourth frame 214, and the first frame, the second frame, the third frame and the fourth frame are welded end to form a closed polygonal frame structure 217; because the cross sections of the frames have the same shape, the common use of the die can be realized during processing, thereby reducing the manufacturing cost; the first beam 215 and the second beam 216 are parallel to the third rim 213 and the fourth rim 214, and both ends are welded or bonded to the polygonal frame structure 217 by beam connection joints 218 (fig. 17).
As shown in fig. 16(a) and (b), the "Z" shaped frame is formed by welding or bonding a second "C" shaped section beam 2111, a second "day" shaped section beam 2112 and a second "mouth" shaped section beam 2113 in this order from the outside to the inside of the battery pack lower case 200; a through hole G2116 is formed in the upper connecting surface 2115 of the second C-shaped section beam, a through hole H2118 is formed in the lower connecting surface 2117 of the second C-shaped section beam, the through hole G2116 is concentric with the through hole H2118, and the diameter of the through hole G2116 is larger than that of the through hole H2118 and is used for being matched with the hollow double-thread bolt 500; the bottom of the beam 2112 with the second cross section shaped like a Chinese character 'ri' is provided with a bottom guard plate connecting surface 2119 for matching connection with the bottom guard plate 230; the second square-shaped section beam 2113 is provided with a liquid cooling system connection surface 2110 for connecting with the liquid cooling system 220; a blind rivet nut mounting hole 2114 for mounting the blind rivet nut 270 is provided in the inner side of the battery pack lower case of the second "day" shaped section beam 2112 of the first frame 211.
As shown in fig. 17, in the cross beam structure in the shape of a square, two ends of the first cross beam 215 and the second cross beam 216 are connected to the polygonal frame structure 217 through cross beam connection joints 218, respectively, and the cross beam connection joints 218 are used for optimizing the connection of the cross beams and enhancing the structural performance of the lower case 200 of the battery pack; the first beam 215 is provided with a through hole I219 along the height direction of the lower box body of the battery pack and is used for being matched with a sleeve 254 of the middle lifting lug.
As shown in fig. 18, the inclined cable device 260 includes two basket bolts 261, four hooks 262, two eye screws 263, one eye nut 264 and a bracket 265, and the tail of the hook 262 is provided with threads for connecting with the basket bolt 261; the two ends of a turn buckle 261 are respectively matched and connected with a hook 262 to form a slant cable 266, one end of the slant cable 266 is connected with the lifting bolt 263, and the other end is connected with the lifting nut 264.
Fig. 19 is a structural diagram of the bracket 265, wherein the bracket 265 is formed by welding or integrally forming a cylinder a2651 and a base plate a2652, and an outer cylindrical surface of the cylinder a2651 is provided with a second external thread 2653 for matching and connecting with the eye nut 264.
As shown in fig. 20, the intermediate lifting lug 250 comprises a T-shaped nut 251, a sealing ring B252, a supporting block 253, a sleeve 254, a sealing ring C255 and a flange bolt a 256; the middle lifting lug 250 is used for connecting the lower box body 200 of the battery pack with the seat beam assembly 101, and the structural performance of the lower box body 200 of the battery pack is ensured.
As shown in fig. 21, the T-nut 251 is formed by welding or integrally molding a hollow cylinder 2512 and a bottom plate B2511, and the inner cylindrical surface of the hollow cylinder 2512 is provided with a second internal thread 2513 for matching connection with the flange bolt a 256.
As shown in fig. 22, the supporting block 253 is a cylindrical structure having a countersunk through hole 2533 at the center for limiting the distance between the first cross member 215 and the integrated vehicle body floor 100; the upper connecting surface 2532 of the supporting block is provided with a sealing groove B2531 for mounting a sealing ring B252; counterbore 2533 is for mating with sleeve 254.
As shown in fig. 23, the sleeve 254 has a hollow stepped shaft structure, the second step 2542 of the sleeve 254 is used for connecting with the supporting block 253, and the third step 2543 of the sleeve is used for connecting with the lower liquid cooling plate 222 of the liquid cooling system 220; the bottom of the sleeve 254 is provided with a sealing groove C2544 for mounting a sealing ring C255; the sleeve 254 is provided with a through hole J2541 for engagement with the flange bolt a 256.
As shown in fig. 24(a), the liquid cooling system 220 includes an upper liquid cooling plate 221, a lower liquid cooling plate 222, an inlet pipe 223, and an outlet pipe 224; the upper liquid cooling plate 221 is made of aluminum alloy materials, and the upper liquid cooling plate 221 is provided with a water outlet 225 and a water inlet 226 which are respectively used for installing a water outlet pipe 223 and a water inlet pipe 224; the upper liquid cooling plate 221 is provided with a through hole K227 and is used for being matched with the sleeve 254 of the middle lifting lug; the upper liquid-cold plate is provided with a through hole L228 for matching with the bracket 265 of the stay device 260; the lower liquid cooling plate 222 is made of a metal material or a composite material, and the lower liquid cooling plate 222 is provided with a flow channel 229 for flowing of cooling liquid; as shown in fig. 24(b), the lower liquid-cooling plate 222 is provided with a through hole M2210 for fitting with the sleeve 254 of the intermediate lug 250; the lower liquid cooling plate 222 is provided with a through hole N2211 for cooperating with the bracket 265 of the cable arrangement 260; through hole K227 is concentric with through hole M2210, through hole L228 is concentric with through hole N2211; the lower liquid cooling plate is provided with a flange edge D2212 for connecting the liquid cooling system 220 with the polygonal frame 217; the upper liquid cooling plate 221 and the lower liquid cooling plate 222 are connected together by welding or structural adhesive to form a liquid cooling plate for guiding the flow of cooling liquid, and the liquid cooling plate plays roles in heat dissipation, heating and heat preservation on the battery core in the battery pack.
The bottom guard plate 230 is made of metal material, composite material or mixed material; as shown in fig. 25, a boss 232 is provided at the middle part of the bottom guard plate 230, and a through hole O234 is provided at the center of the boss 232 for cooperating with a flange bolt a 256; the bottom guard plate 230 is provided with a plurality of reinforcing ribs C231 for enhancing the structural performance of the bottom guard plate; the edge of the bottom guard plate is provided with a flange edge C235 for connecting with the polygonal frame structure 217.
FIG. 26 is an assembly view of the liquid cooling system, the bottom protective plate and the polygonal frame structure, wherein the flange D2212 of the lower liquid cooling plate is connected with the liquid cooling system connecting surface 2110 of the second cross-section beam in a shape like a Chinese character kou by welding or structural adhesive after being lapped; and after the flange edge C235 of the bottom guard plate is matched with the bottom guard plate connecting surface 2119 of the second beam with the cross section shaped like a Chinese character 'ri', the bottom guard plate is connected by welding, structural adhesive or hot melting self-tapping 240.
As shown in fig. 27(a), (b), after the upper liquid cooling plate 221 of the liquid cooling system is engaged with the bottom of the cross beam (the first cross beam 215 and the second cross beam 216), it is connected by welding or structural adhesive; the sleeve 254 of the middle lifting lug 250 sequentially penetrates through the through hole M2110, the through hole K227 and the through hole I219 from bottom to top and then is connected with the first cross beam 215 by welding or structural adhesive; the third step 2543 of the sleeve is connected with the lower liquid cooling plate 222 in a matching manner, so that the connection between the liquid cooling system 220 and the first beam 215 is enhanced; the boss 232 of the bottom guard plate is in contact connection with the bottom connecting surface 2545 of the sleeve, and a sealing ring C255 is installed on the sealing groove C2544 and used for ensuring the air tightness of the connecting part.
As shown in fig. 28(a) and (b), the suspension bolts 263 at both ends of the stay cable device 260 are respectively connected with the rivet nut mounting holes 2114 of the two first beams 215 by the rivet nuts 270 in a matching manner; after the cylinder A2651 of the bracket sequentially passes through the through hole N2211 and the through hole L228 from bottom to top, the bottom plate A2652 of the bracket is in contact connection with the lower liquid cooling plate 222; the eyenut 264 engages the second external threads 2653 of the cylinder A to connect the strop device 260 to the liquid cooling system 220; the pretightening force of the inclined cable device 260 is controlled by adjusting the bolts of the turnbuckles 261, so that the deformation of the liquid cooling system 220 after stress is reduced; the small size of the stay wire device 260 can be used for replacing the arrangement of the battery pack beam, so that the volume utilization rate of the battery pack box body is improved.
As shown in fig. 29(a) and (b), the bottoms of the plurality of electric cores 600 are coated with a heat-conducting structural adhesive and then arranged in the open cavity for accommodating the electric cores, a certain gap is left between every two electric cores, the gap between the electric cores and the open cavity is filled by pouring a filling material 700 into the open cavity, and the electric cores 600 and the battery pack lower case 200 are fixedly connected into a whole after the filling material 700 is cured, so that the non-module connection between the electric cores and the battery pack lower case is realized, the structural performance and the volume utilization rate of the battery pack case are improved, and the number of parts of the battery pack is reduced; the stay device 260 is poured into the filling material 700 to form a structure similar to reinforced concrete, thereby further enhancing the structural performance of the box body under the battery pack.
As shown in fig. 30(a) and (b), the bottoms of a plurality of battery cells 600 are coated with a heat-conducting structural adhesive and then arranged in an opening cavity for accommodating the battery cells, and a certain gap is left between every two battery cells, after the embedded pipe 800 is arranged at a larger gap between the battery cell 600 and the opening cavity, a filling material 700 is poured into the opening cavity to fill the gap between the battery cell 600 and the opening cavity, so that a cavity 900 is formed at a larger gap, thereby reducing the consumption of the filling material 700 and achieving the purpose of saving cost; the cross-sectional shape of the pre-buried pipe 800 can be flexibly designed according to the size of the gap and the performance requirements, and can be a composite material or a metal material.
As shown in fig. 31(a), (B), and (c), after the hollow cylinder 2512 of the T-shaped nut 251 sequentially passes through the through hole P111, the through hole B147, and the through hole D154 from top to bottom, the T-shaped nut base plate B2511 is connected to the upper reinforcing plate 110 by welding or structural adhesive; after the first cross beam 215 and the sleeve 254 of the lower battery pack box are installed, the supporting block 253 and the sleeve 254 are concentrically matched, the lower supporting block connecting surface 2535 is in contact connection with the upper first cross beam connecting surface, the lower battery pack box is moved from bottom to top to enable the countersunk head through hole 2533 of the supporting block to be concentrically matched with the hollow cylinder 2512, and finally the flange bolt A265 sequentially penetrates through the through hole O234 and the through hole J2541 from bottom to top and then is matched with a second internal thread 2513 of the T-shaped nut, so that the detachable connection between the lower battery pack box 200 and the seat cross beam assembly 101 is completed; the pretightening force applied by the flange bolt A256 is matched with the sealing ring B252 and the sealing ring C255 to ensure the air tightness of the joint; the detachable fixed connection of the lower box body 200 of the battery pack and the transverse seat assembly 101 can be realized through the connection mode, so that the battery pack has good maintainability.
As shown in fig. 32(a) and (b), the battery pack lower case 200 moves from bottom to top to make the through hole G2116 of the polygonal frame structure 217 concentrically fit with the hollow double-threaded bolt 500; the diameter of the through hole G2116 is slightly larger than the outer diameter of a second cylinder 507 of the hollow double-thread bolt, the diameter of the through hole H2118 is smaller than the outer diameter of the second cylinder 507 of the hollow double-thread bolt, and the bottom of the second cylinder 507 of the hollow double-thread bolt penetrates through the through hole G2116 to be in contact connection with a second C-shaped section beam 2111; the flange bolt B258 penetrates through the through hole H2118 from bottom to top and then is matched and connected with the first internal thread 503 of the hollow double-thread bolt, so that the polygonal frame structure 217 is completed, and the vehicle body floor 100 is detachably and fixedly connected with the integrated structure; the pretightening force applied by the flange bolt B258 is matched with the sealing ring A257 to ensure the air tightness of the joint; a battery pack lower box body sealing gasket 160 is arranged between the flange edge A143 of the integrated floor and the polygonal frame structure 217, so that the air sealing of the battery pack lower box body is ensured; the detachable fixed connection of the lower box body of the battery pack and the integrated vehicle body floor can be realized through the connection mode, so that the battery pack has good maintainability.
The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.

Claims (10)

1. The utility model provides an integrated structure of automobile body and battery package under integrated electric automobile which characterized in that includes:
the integrated vehicle body floor (100) is formed by sequentially connecting an upper reinforcing plate (110), an integrated floor (140) and a lower reinforcing plate (150) into a whole from top to bottom; the integrated floor (140) is provided with a plurality of seat cross beams (142) at positions corresponding to the installation positions of the automobile seats, and the cross sections of the seat cross beams (142) and the upper reinforcing plate (110) in the length direction of the automobile body are the same; the seat cross beam (142), the upper reinforcing plate (110) and the lower reinforcing plate (150) form a seat cross beam assembly (101); both ends of the seat cross beam assembly (101) are provided with connecting joints (120);
the battery pack lower box body (200) comprises a lower box body frame (210), an inclined cable device (260), a middle lifting lug (250), a liquid cooling system (220) and a bottom guard plate (230), wherein the liquid cooling system (220) and the lower box body frame (210) are matched to form an open cavity for containing a battery cell, two ends of the inclined cable device (260) are connected with the lower box body frame (210), the middle of the inclined cable device is connected with the liquid cooling system (220), and the bottom guard plate (230) is connected with the lower box body frame (210); the lower box body frame (210) is connected with the integrated vehicle body floor (100); the middle lifting lug (250) is connected with the first cross beam (215) and the seat cross beam assembly (101);
the integrated vehicle body floor (100) is connected with the floor connecting surface of the lower vehicle body (300), and after the integrated vehicle body floor (100) is matched with the lower battery pack box body (200), a sealing cavity for accommodating the battery core is formed.
2. The integrated structure of the lower vehicle body and the battery pack of the integrated electric vehicle as claimed in claim 1, wherein the connection joint (120) comprises a joint (123), a reinforcing connection plate (122) and a vehicle body connection plate (121), and the reinforcing connection plate (122) is connected with a joint connection surface (125) of the vehicle body connection plate (121); one end of the joint (123) is a first cross-section beam (1241) in a shape like the Chinese character 'ri', the other end of the joint is a first cross-section beam (1242) in a shape like the Chinese character 'ri', the upper end of the first cross-section beam (1241) in the shape like the Chinese character 'ri' is connected with the upper reinforcing plate (110), the side edge of the first cross-section beam (1241) in the shape like the Chinese character 'ri' is connected with a joint connecting surface (125) of the vehicle body connecting plate (121), and the inclined edge (1247) of the first cross-section beam (1242) in the shape like the Chinese character 'ri' is connected with the end surface (146) of the seat cross beam; the reinforcing connecting plate (122) is provided with a connecting plate (1222) with the same cross section shape as the upper reinforcing plate (110) in the length direction of the vehicle body, and the connecting plate (1222) is connected with the upper reinforcing plate (110); the upper ends of the first reversed-Y-shaped section beam (1241) and the first C-shaped section beam (1242) are connected with the upper reinforcing plate (110).
3. The integrated structure of the lower vehicle body and the battery pack of the integrated electric vehicle as claimed in claim 1, wherein the lower box frame (210) is formed by splicing a Z-shaped frame and a square-shaped cross beam; the Z-shaped frame is formed by sequentially connecting a second C-shaped section beam (2111), a second B-shaped section beam (2112) and a second C-shaped section beam (2113) from the outer side to the inner side of the lower box body (200) of the battery pack; the upper connecting surface and the lower connecting surface of the second C-shaped section beam (2111) are provided with through holes which are used for being matched with a hollow double-thread bolt (500); the bottom of the second cross beam (2112) with the cross section shaped like a Chinese character 'ri' is provided with a bottom guard plate connecting surface (2119) which is used for being matched and connected with the bottom guard plate (230); the second cross-section beam (2113) with the shape like a Chinese character kou is provided with a liquid cooling system connection surface (2110) for connecting with a liquid cooling system (220).
4. The integrated structure of the lower vehicle body and the battery pack of the integrated electric vehicle as claimed in claim 3, wherein the lower box body (200) of the battery pack is connected with the integrated vehicle body floor (100) through a hollow double-thread bolt (500), the hollow double-thread bolt (500) is a two-section concentric cylindrical hollow structure, and a first step (501) is formed at the joint of the two sections of cylinders; two sections of concentric cylinders include first cylinder (508) and second cylinder (507), and first cylinder (508) outer cylinder face is equipped with first external screw thread (502), and the inner cylinder face is equipped with first internal thread (503), and second cylinder (507) bottom is equipped with seal groove A (506) and hexagon counterbore (505).
5. The integrated structure of the lower automobile body and the battery pack of the integrated electric automobile according to claim 1, wherein the stay device (260) comprises two basket bolts (261), four lifting hooks (262), two lifting eye screws (263), a lifting eye nut (264) and a bracket (265), two ends of one basket bolt (261) are respectively matched and connected with one lifting hook (262) to form a stay (266), one end of the stay (266) is connected with the lifting eye screw (263), the other end of the stay is connected with the lifting eye nut (264), and the bottom end of the lifting eye nut (264) is matched and connected with the bracket (265).
6. The integrated structure of the lower body and the battery pack of the integrated electric vehicle as claimed in claim 1, wherein the intermediate lifting lug (250) comprises a T-shaped nut (251), a sealing ring B (252), a supporting block (253), a sleeve (254), a sealing ring C (255) and a flange bolt a (256); the T-shaped nut (251) is connected with a flange bolt A (256) in a matched mode; the supporting block (253) is of a cylindrical structure, the center of the supporting block is provided with a countersunk through hole (2533), and the countersunk through hole (2533) is used for being matched with the sleeve (254); sleeve (254) is cavity ladder shaft structure, and second step (2542) and supporting shoe (253) of sleeve (254) are connected, and sleeve (254) bottom is equipped with seal groove C (2544) for installation sealing washer C (255), sleeve (254) are equipped with through-hole J (2541), are used for cooperating with flange bolt A (256).
7. The integrated structure of the lower vehicle body and the battery pack of the integrated electric vehicle as claimed in claim 1, wherein the integrated floor (140) is provided with a plurality of reinforcing ribs A (145) in the height direction of the battery pack, and the lower reinforcing plate (150) is provided with a plurality of reinforcing ribs B (153) at positions corresponding to the seat cross member (142).
8. The integrated structure of the lower vehicle body and the battery pack of the integrated electric vehicle as claimed in claim 1, wherein a plurality of battery cells (600) are arranged in the open cavity, a gap is left between each battery cell (600) and the open cavity, and a filling material (700) is poured into the gap.
9. The integrated structure of the lower vehicle body and the battery pack of the integrated electric vehicle as claimed in claim 8, wherein a pre-buried pipe (800) is arranged in the gap, and when the filling material (700) is poured, a cavity (900) is formed at the pre-buried pipe (800).
10. The integrated structure of the lower body and the battery pack of the integrated electric vehicle as claimed in claim 3, wherein the integrated floor (140), the upper reinforcing plate (110), the lower reinforcing plate (150), the reinforcing connecting plate (122) and the bottom guard plate (230) are all made of composite materials or metal materials or mixed materials.
CN202210158050.7A 2022-02-21 2022-02-21 Integrated structure of automobile body and battery package under integrated electric automobile Active CN114571976B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116470225A (en) * 2023-06-19 2023-07-21 中国第一汽车股份有限公司 Bearing type battery upper cover, vehicle and preparation method of bearing type battery upper cover
WO2024000277A1 (en) * 2022-06-29 2024-01-04 宁德时代新能源科技股份有限公司 Case, battery, and electrical device
WO2024040392A1 (en) * 2022-08-22 2024-02-29 宁德时代新能源科技股份有限公司 Battery and electric device
FR3139108A1 (en) * 2022-08-26 2024-03-01 Psa Automobiles Sa Floor stiffener for a motor vehicle comprising mechanical reinforcement protuberances

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100025132A1 (en) * 2008-06-27 2010-02-04 Dale Hill Vehicle battery systems and methods
JP2011126439A (en) * 2009-12-18 2011-06-30 Toyota Motor Corp Structure of vehicle with battery
CN102180200A (en) * 2011-05-30 2011-09-14 柳崇禧 Automatic vehicle-mounted mobile power charging and exchanging station for electric vehicle and method for quickly exchanging battery
JP2011247058A (en) * 2010-05-31 2011-12-08 Hitachi Constr Mach Co Ltd Construction machinery
CN203780293U (en) * 2014-02-12 2014-08-20 浙江立通新能源汽车有限公司 Fixing device for storage battery pack of electric vehicle
KR20140144330A (en) * 2013-06-10 2014-12-19 현대자동차주식회사 Device for cooling and heating battery module of vehicle
CN109955704A (en) * 2019-03-28 2019-07-02 江苏大学 A kind of batteries of electric automobile packet suspending apparatus
CN110611064A (en) * 2019-09-29 2019-12-24 江苏大学 Aluminum alloy battery pack lower shell
CN110723220A (en) * 2019-09-29 2020-01-24 江苏大学 Aluminum alloy lower vehicle body structure of electric vehicle
CN110957440A (en) * 2018-09-26 2020-04-03 天津博威动力设备有限公司 Suspension type battery support
CN210607369U (en) * 2019-09-29 2020-05-22 江苏大学 Aluminum alloy battery pack lower shell
CN112092602A (en) * 2020-08-21 2020-12-18 江苏大学 Tractor hybrid power system with range-extending type fuel cell and control method
JP2021088261A (en) * 2019-12-04 2021-06-10 本田技研工業株式会社 Vehicle lower part structure
WO2021174234A2 (en) * 2021-04-01 2021-09-02 Dupont Polymers, Inc. Battery pack support and battery pack
CN113665684A (en) * 2021-09-29 2021-11-19 蜂巢能源科技有限公司 Vehicle body floor assembly of vehicle and vehicle

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100025132A1 (en) * 2008-06-27 2010-02-04 Dale Hill Vehicle battery systems and methods
JP2011126439A (en) * 2009-12-18 2011-06-30 Toyota Motor Corp Structure of vehicle with battery
JP2011247058A (en) * 2010-05-31 2011-12-08 Hitachi Constr Mach Co Ltd Construction machinery
CN102180200A (en) * 2011-05-30 2011-09-14 柳崇禧 Automatic vehicle-mounted mobile power charging and exchanging station for electric vehicle and method for quickly exchanging battery
KR20140144330A (en) * 2013-06-10 2014-12-19 현대자동차주식회사 Device for cooling and heating battery module of vehicle
CN203780293U (en) * 2014-02-12 2014-08-20 浙江立通新能源汽车有限公司 Fixing device for storage battery pack of electric vehicle
CN110957440A (en) * 2018-09-26 2020-04-03 天津博威动力设备有限公司 Suspension type battery support
CN109955704A (en) * 2019-03-28 2019-07-02 江苏大学 A kind of batteries of electric automobile packet suspending apparatus
CN110611064A (en) * 2019-09-29 2019-12-24 江苏大学 Aluminum alloy battery pack lower shell
CN110723220A (en) * 2019-09-29 2020-01-24 江苏大学 Aluminum alloy lower vehicle body structure of electric vehicle
CN210607369U (en) * 2019-09-29 2020-05-22 江苏大学 Aluminum alloy battery pack lower shell
JP2021088261A (en) * 2019-12-04 2021-06-10 本田技研工業株式会社 Vehicle lower part structure
CN112092602A (en) * 2020-08-21 2020-12-18 江苏大学 Tractor hybrid power system with range-extending type fuel cell and control method
WO2021174234A2 (en) * 2021-04-01 2021-09-02 Dupont Polymers, Inc. Battery pack support and battery pack
CN113665684A (en) * 2021-09-29 2021-11-19 蜂巢能源科技有限公司 Vehicle body floor assembly of vehicle and vehicle

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
WAI CHUNG LEE ET AL: "An integrated design of active balancing and redundancy at module level for Electric Vehicle batteries" *
江浩斌等: "基于联合滑模变结构的电动轮汽车DYC系统研究" *
肖勇;丁玉梅;秦柳;程祥;虞华春;杨卫民;: "新能源汽车轻量化的关键技术" *
肖樨;: "储能式现代有轨电车布线设计" *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024000277A1 (en) * 2022-06-29 2024-01-04 宁德时代新能源科技股份有限公司 Case, battery, and electrical device
WO2024040392A1 (en) * 2022-08-22 2024-02-29 宁德时代新能源科技股份有限公司 Battery and electric device
FR3139108A1 (en) * 2022-08-26 2024-03-01 Psa Automobiles Sa Floor stiffener for a motor vehicle comprising mechanical reinforcement protuberances
CN116470225A (en) * 2023-06-19 2023-07-21 中国第一汽车股份有限公司 Bearing type battery upper cover, vehicle and preparation method of bearing type battery upper cover
CN116470225B (en) * 2023-06-19 2023-10-27 中国第一汽车股份有限公司 Bearing type battery upper cover, vehicle and preparation method of bearing type battery upper cover

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