CN210607353U - Lower shell of steel-aluminum hybrid battery pack - Google Patents
Lower shell of steel-aluminum hybrid battery pack Download PDFInfo
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- CN210607353U CN210607353U CN201921324928.XU CN201921324928U CN210607353U CN 210607353 U CN210607353 U CN 210607353U CN 201921324928 U CN201921324928 U CN 201921324928U CN 210607353 U CN210607353 U CN 210607353U
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- battery pack
- steel
- bottom plate
- middle lifting
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model discloses a lower shell of a steel-aluminum hybrid battery pack, which comprises a frame structure, a cross beam, a longitudinal beam, a bottom plate and a middle lifting lug; the middle lifting lug penetrates through the cross beam and the bottom plate from top to bottom and is fixed with the cross beam and the bottom plate, the middle lifting lug comprises a middle lifting lug body with a cylindrical hollow structure, the top end of the middle lifting lug body is matched with a middle lifting lug nut, and the lower end of the middle lifting lug body is sequentially arranged in the middle lifting lug reinforcing plate and the middle lifting lug sleeve in a penetrating manner; the frame structure is formed by splicing four frames, the four frames are divided into two groups, each group of frame structure is the same and is oppositely arranged, the cross beam is formed by embedding an inverted U-shaped thin-wall structure with lightening holes into a convex thin-wall structure with lightening holes, and the frame structure is made of aluminum alloy; the cross beam, the longitudinal beam, the middle lifting lug and the bottom plate are all made of steel. The utility model discloses fully absorbed the advantage of aluminum alloy and high-strength steel, realized lightweight, the low-cost design of battery package box, and welding deformation is little, joint strength is high, machining efficiency is high.
Description
Technical Field
The utility model relates to a new energy automobile technical field, concretely relates to lower casing of steel aluminium hybrid battery package.
Background
With the increasing prominence of environmental pollution and energy problems, the development of pure electric vehicles is an effective way to solve the problems. The key problems that the popularization and the application of the pure electric vehicle are urgently needed to be solved are that the servicing quality of the electric vehicle is reduced, the endurance mileage is improved, and the product cost is reduced. The weight of the battery pack accounts for about 30% of the whole weight of the electric automobile, and the lower shell of the battery pack accounts for about 20% -30% of the weight of the battery pack. Therefore, the light-weight and low-cost structural design and manufacture of the lower shell of the battery pack are developed, and the lower shell of the battery pack has important significance for reducing the servicing quality and cost of the electric automobile and improving the endurance mileage of the electric automobile.
The aluminum magnesium alloy has the advantages of low density, good energy absorption effect, easy realization of design and manufacture of complex structures and the like, but has the defect of higher cost. Although the aluminum alloy battery pack lower shell has the advantages of light weight and excellent performance, the product cost is high, and the large-scale popularization and application of the aluminum alloy battery pack lower shell are limited to a certain extent. The high-strength steel has the advantages of low cost, high strength, good mechanical property, mature manufacturing process and the like, but has the defect of high density. Although the steel battery pack lower shell can meet various performance indexes of the battery pack, the heavier lower shell is a main factor limiting the large-scale popularization and application of the steel battery pack lower shell.
The battery pack box based on the mixed material and the structure provides a new idea for solving the problems. The prior art discloses a battery pack with a mixed structure, which comprises a frame, a lower substrate, a reinforcing plate, a partition frame and an upper cover plate, wherein the frame is made of aluminum alloy extruded profiles, and the lower substrate, the reinforcing plate, the partition frame and the upper cover plate are made of carbon fiber unidirectional cloth and polyurethane resin. Although the battery pack has a good light weight effect, the manufacturing cost is high due to the fact that a large amount of composite materials are used, and therefore large-scale popularization and application of the battery pack are restricted. The prior art also discloses a steel-aluminum hybrid battery pack lower shell structure, which comprises a frame, a bottom plate and a reinforcing beam, wherein the frame and the reinforcing beam are of aluminum alloy profile extrusion structures, and the bottom plate is of a steel plate stamping part. However, it is difficult to further reduce the manufacturing cost of the battery pack case by using a large number of aluminum alloy profile structures, and the bottom plate and the reinforcing beam of the battery pack are connected only by an adhesive process, and the structural adhesive is easy to age and fail under a severe environment, which may cause problems such as poor connection strength of the lower case of the battery pack, and reduced mechanical structure performance.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a lower casing of steel aluminium hybrid battery package aims at realizing lightweight, low-cost design and the manufacturing of electric automobile battery package.
The technical scheme of the utility model is that:
the lower shell of the steel-aluminum hybrid battery pack comprises a frame structure, a cross beam and a bottom plate, and further comprises a middle lifting lug, wherein the middle lifting lug penetrates through the cross beam and the bottom plate from top to bottom and is fixed with the cross beam and the bottom plate; the frame structure is formed by four frames concatenation, the crossbeam comprises "protruding" font thin-wall structure by the embedded of type of falling U thin-wall structure, middle lug includes cylindrical hollow structure's middle lug body, and middle lug body top cooperates with middle lug nut, and the lower extreme is installed in middle lug reinforcing plate and middle lug sleeve in proper order, and middle lug body is connected with middle lug reinforcing plate MIG welding.
In the technical scheme, the four frames are divided into two groups, and each group of frames has the same structure and are oppositely arranged; the first group of frames are integrally formed by a square-shaped cavity structure, a square-shaped cavity structure A and a triangular cavity structure A which are sequentially arranged, the square-shaped cavity structure is positioned in the inner side direction of the battery pack, the lower ribs A of the square-shaped cavity structure A are obliquely arranged, the bottom of the square-shaped cavity structure extends out of a flanging A along the inner side direction of the battery pack and is connected with a bottom plate through self-punching riveting and gluing, the self-punching rivets are positioned on the inner ring, and the gluing is positioned on the outer ring; the group of frames are connected with turnups E at two ends of the length direction of the convex thin-walled structure by loose core rivet; the second group of frames are integrally formed by a mesh-shaped cavity structure B and a triangular cavity structure B which are sequentially arranged, the mesh-shaped cavity structure B is positioned in the inner side direction of the battery pack, lower ribs B of the mesh-shaped cavity structure B are obliquely arranged, and a flanging B extends from the bottom of the mesh-shaped cavity structure B along the inner side direction of the battery pack and is connected with the bottom plate through self-piercing riveting and gluing; the group of frames are connected with turned-over edges D at two ends of the inverted-U-shaped thin-wall structure in the length direction through core-pulling rivet connection.
In the technical scheme, a lifting lug mounting hole B is formed in the upper surface of the convex thin-wall structure, a lifting lug mounting hole A is formed in the middle of the inverted U-shaped thin-wall structure, and the lifting lug mounting hole A and the lifting lug mounting hole B are matched with the middle lifting lug mounting hole A and the middle lifting lug mounting hole B; and a plug welding process hole A is formed in the inner side wall in the middle of the convex thin-wall structure and matched with a plug welding process hole B in two side walls of the middle lifting lug reinforcing plate, so that the middle lifting lug is connected with the cross beam in a plug welding manner.
In the technical scheme, the inverted U-shaped thin-wall structure is provided with lightening holes A, and the convex thin-wall structure is provided with lightening holes B.
In the technical scheme, the lower shell further comprises a longitudinal beam, and the lower surface of a turned edge at the bottom of the longitudinal beam is attached to the upper surface of a turned edge A and is in self-piercing riveting connection; the lower surface of the flange at the bottom of the longitudinal beam is also attached to the upper surface of the bottom plate and the upper surface of the flange D and is connected with the upper surface of the bottom plate through resistance spot welding; flanges F are designed at two ends of the longitudinal beam along the length direction of the longitudinal beam, one end of the longitudinal beam is connected with the first group of frames in an adhesive mode, and the other end of the longitudinal beam is welded with the cross beam in an MIG mode.
In the technical scheme, the frame structure is made of aluminum alloy, and the cross beam, the longitudinal beam, the middle lifting lug and the bottom plate are all made of steel; the frame structure is manufactured by extrusion processing; the transverse beam and the longitudinal beam are formed by stamping or rolling.
The utility model has the advantages that:
1) the utility model discloses the connection problem between the steel aluminium xenogenesis material has successfully been solved to the structure utilization from punching rivet, sticky, MIG welds, the multiple connection technology of resistance spot welding.
2) The utility model discloses the structure has light in weight, with low costs, welding deformation is little, joint strength is high, machining efficiency is high, equipment investment low grade advantage, provides fine solution for lightweight, low-cost design and the manufacturing of battery package.
3) The utility model discloses the structure can increase battery module quantity through the mode that increases battery package length or width and crossbeam quantity to satisfy the battery module of the nimble different quantity of installation of different demands of consumer to the continuation of the journey mileage, realize battery package platformization and modular design and manufacturing.
Drawings
Fig. 1 is a lower axial view of the steel-aluminum hybrid battery pack of the present invention;
fig. 2 is a schematic diagram of the frame structure of the present invention, fig. 2(a) is a schematic diagram of the frame connection relationship of the present invention, fig. 2(b) is a partial enlarged view of the frame of the present invention, fig. 2(c) is a schematic diagram of the frame 1 and the frame 3 of the present invention, fig. 2(d) is a schematic diagram of the cross section of the frame 1 and the frame 3 of the present invention, fig. 2(e) is a schematic diagram of the frame 2 and the frame 4 of the present invention, and fig. 2(f) is a schematic diagram of the cross section of the frame 2 and the frame 4 of the present invention;
fig. 3 is a schematic view of the cross beam structure of the present invention, fig. 3(a) is a schematic view of the assembly relationship between the "convex" shaped thin-wall structure and the inverted U-shaped thin-wall structure of the present invention, fig. 3(b) is a schematic view of the "convex" shaped thin-wall structure of the present invention, fig. 3(c) is a schematic view of the cross section of the "convex" shaped thin-wall structure of the present invention, fig. 3(d) is a schematic view of the inverted U-shaped thin-wall structure of the present invention, and fig. 3(e) is a schematic view of the cross section of the inverted U;
fig. 4 is a schematic view of the structure of the middle lifting lug of the present invention, fig. 4(a) is an explosion diagram of the middle lifting lug of the present invention, fig. 4(b) is a schematic view of the assembly relationship of the middle lifting lug of the present invention, and fig. 4(b) is a cross-sectional view of the assembly relationship of the middle lifting lug of the present invention;
FIG. 5 is a schematic view of the bottom plate structure of the present invention;
fig. 6 is a schematic structural view of the longitudinal beam of the present invention, fig. 6(a) is a schematic structural view of the longitudinal beam of the present invention, and fig. 6(b) is a schematic cross-sectional view of the longitudinal beam of the present invention;
fig. 7 is a schematic view of the connection relationship between the longitudinal beam and the frame, the cross beam and the bottom plate of the present invention, fig. 7(a) is a schematic view of the connection relationship between the longitudinal beam and the frame structure of the present invention, fig. 7(b) is a schematic view of the connection relationship between the longitudinal beam and the cross beam of the present invention, and fig. 7(c) is a schematic view of the connection relationship between the longitudinal beam and the bottom plate of the present invention;
FIG. 8 is a schematic view of the connection relationship between the No. 2 frame, the No. 4 frame and the cross beam of the present invention;
FIG. 9 is a schematic view of the connection relationship between the No. 1 frame and the No. 3 frame and the bottom plate of the present invention;
FIG. 10 is a schematic view of the connection relationship between the No. 2 frame and the No. 4 frame and the bottom plate of the present invention;
FIG. 11 is a schematic view of the connection relationship between the cross beam and the bottom plate of the present invention;
fig. 12 is a connection relationship diagram of the middle lifting lug, the cross beam and the bottom plate of the present invention, fig. 12(a) is a connection relationship diagram of the middle lifting lug, the cross beam and the bottom plate of the present invention, and fig. 12(b) is a connection relationship cross-sectional view of the middle lifting lug, the cross beam and the bottom plate of the present invention;
fig. 13 is a schematic view of the assembly relationship between the middle battery module and the cross beam and the frame.
Wherein: 100-frame structure, No. 110-1 frame, 111- 'mouth' -shaped cavity structure, 112- 'mesh' -shaped cavity structure A, 113-triangular cavity structure A, 114-upper rib A, 115-lower rib A, 116-flanging A, 117-rivet nut mounting hole A, 118-lifting lug mounting hole, 119-small boss A, 1110-rivet nut mounting hole B, No. 120-2 frame, 121- 'mesh' -shaped cavity structure B, 122-triangular cavity structure B, 123-upper rib B, 124-lower rib B, 125-flanging B, 126-rivet mounting hole, 127-rivet nut mounting hole C, 128-small boss B, 129-rivet nut mounting hole D, No. 130-3 frame, No. 140-4 frame, 200-beam, 210-inverted U-shaped thin-wall structure, 211-flanging D, 212-middle lifting lug mounting hole A, 213-riveting nut mounting hole E, 214-riveting nut mounting hole F, 220-convex thin-wall structure, 221-flanging C, 222-flanging E, 223-middle lifting lug mounting hole B, 224-plug welding process hole A, 225-riveting nut mounting hole G, 226-lightening hole, 300-longitudinal beam, 301-flanging F, 400-middle lifting lug, 410-middle lifting lug body, 411-O-shaped groove, 412-cylindrical groove 420-middle lifting lug nut, 430-O-shaped sealing ring, 440-middle lifting lug reinforcing plate, 441-middle body mounting hole A, 442-plug welding process hole B, 450-middle lifting lug sleeve, 451-a middle lifting lug body mounting hole B, 500-a bottom plate, 501-a reinforcing rib, 502-a glue coating groove, 503-a middle lifting lug mounting hole C, 600-a sealing strip, 700-a self-plugging rivet and 800-a pulling rivet nut.
Detailed Description
The invention is described in further detail below with reference to the drawings and specific examples.
Fig. 1 is the utility model discloses lower shell axonometric drawing of steel-aluminum hybrid battery package, including frame structure 100, crossbeam 200, longeron 300, middle lug 400 and bottom plate 500 quintuple, frame structure 100 is riveted with bottom plate 500 through the viscose and is connected from dashing, frame structure 100 is riveted with crossbeam 200 both ends turn-ups rivet through the rivet mounting hole 126 of inner wall, crossbeam 200 bottom turn-ups adopts resistance spot welding with bottom plate 500 to be connected, longeron 300 one end turn-ups is connected through the viscose with frame structure 100, the other end turn-ups passes through MIG welding with crossbeam 200 and is connected, longeron 300 bottom turn-ups passes through resistance spot welding with bottom plate 500 and is connected, middle lug 400 top-down passes crossbeam 200, bottom plate 500, middle lug 400 is plug welded with crossbeam 200 and is connected, with bottom plate 500MIG welding.
Fig. 2 is the utility model discloses frame structure 100's structural schematic, wherein, fig. 2(a) is frame structure 100 connection relation sketch map, frame 100 includes frame 110 No. 1, frame 120 No. 2, frame 130 and frame 140 No. 3, each frame "mesh" font cavity structure A112, "mesh" font cavity structure B121 both ends are all processed into 45 ° (be "mesh" font cavity structure A112, "mesh" font cavity structure B121 is the down-trapezoid in the top view of frame structure 100 promptly), thereby the concatenation forms confined rectangular frame structure, the angular position of rectangular frame structure amputates the partial material of triangle-shaped cavity structure (fig. 2(B)), make things convenient for four edges and corners positions of rectangular frame structure to use MIG welding to connect, in order to guarantee the gas tightness requirement of battery package. No. 1-4 frames belong to an aluminum alloy multi-cell thin-wall structure, and the frame structure 100 and lifting lugs are integrally designed and can be manufactured through an extrusion process.
Fig. 2(c) is a schematic structural diagram of the No. 1 frame 110 and the No. 3 frame 130, fig. 2(d) is a schematic sectional diagram of the No. 1 frame 110 and the No. 3 frame 130, the No. 1 frame 110 and the No. 3 frame 130 are designed into the same sectional shape, a set of mold can be saved, and the manufacturing cost can be reduced, specifically, the battery pack is composed of a square cavity structure 111, a square cavity structure a112 and a triangular cavity structure a113, the square cavity structure a112 is located in the middle, the square cavity structure 111 is closely adjacent to the square cavity structure a112 and is located in the inner side direction of the battery pack, the triangular cavity structure a113 is closely adjacent to the square cavity structure a112 and is located in the outer side direction of the battery pack, the upper rib a114 of the square cavity structure a112 is horizontally arranged, the lower rib a115 is obliquely arranged, and the two ribs are favorable for sequentially transmitting the fastest path for the load of the battery pack to the square cavity structure a113 (equivalent to a lifting, On the automobile body, a turned edge A116 extends from the bottom of the square-shaped cavity structure 111 along the inner side direction of the battery pack and is used for being connected with a bottom plate 500 in a self-piercing riveting and gluing mode, and a rivet nut mounting hole A117 is designed in the upper surface of the square-shaped cavity structure 111 and is used for mounting a battery module.
Fig. 2(e) is a schematic structural diagram of No. 2 frame 120 and No. 4 frame 140, fig. 2(f) is a schematic sectional diagram of No. 2 frame 120 and No. 4 frame 140, No. 2 frame 120 and No. 4 frame 140 are designed into the same sectional shape, a set of mold can be saved, and the manufacturing cost can be reduced, specifically, the battery pack is composed of a cavity structure B121 shaped like a Chinese character ' mu ' and a cavity structure B122 shaped like a triangle, wherein the cavity structure B121 shaped like a Chinese character ' mu ' is located in the inside direction of the battery pack, the cavity structure B122 shaped like a Chinese character ' mu ' is closely adjacent to the cavity structure B121 shaped like a Chinese character ' mu ' and located in the outside direction of the battery pack, an upper rib B123 of the cavity structure B121 shaped like a Chinese character ' mu ' is horizontally arranged, a lower rib B124 is obliquely arranged, a turned-over edge B125 is extended from the bottom of the cavity structure B121 shaped like a Chinese character ' mu, for connection with the cross member 200.
As shown in fig. 2(d) and (f), a lifting lug mounting hole a118 and a lifting lug mounting hole B127 are designed in the triangular cavity structure a113 and the triangular cavity structure B122 of the No. 1-4 frames along the height direction of the battery pack, and are used for being connected with the frame through bolts; the upper surface of the No. 1-4 frame is provided with a small boss A119 and a small boss B128 which are arranged upwards at the corner positions close to the inner side direction of the battery pack and used for preventing external water vapor and dust from entering the battery pack; the upper surface of the No. 1-4 frame is provided with a rivet nut mounting hole B1110 and a rivet nut mounting hole D129 which are used for being connected with the sealing strip 600 and the upper shell through bolts, so that the sealing requirement of the battery pack is met.
As shown in fig. 3, the cross beam 200 is a steel member, and is formed by embedding an inverted U-shaped thin-wall structure 210 into a "convex" thin-wall structure 220 (fig. 3(a)) and assembling and connecting the inverted U-shaped thin-wall structure by a resistance spot welding process, and the cross beam 200 can be manufactured by stamping or roll forming. Fig. 3(b) and (C) are respectively a "convex" thin-wall structure 220 and a schematic cross-sectional view thereof, fig. 3(d) is an inverted U-shaped thin-wall structure 210 and a schematic cross-sectional view thereof, and a flange C221 extending towards two sides is arranged at the bottom of the "convex" thin-wall structure 220 and is used for resistance spot welding connection with the bottom plate 500; two ends of the convex thin-wall structure 220 in the length direction are provided with flanges E222 for core-pulling rivet connection with the No. 2 frame 120 and the No. 4 frame 140; a lifting lug mounting hole B223 is designed on the upper surface of the convex thin-wall structure 220 and used for mounting the middle lifting lug 400; a plug welding process hole A224 is designed at the middle inner side wall position of the convex thin-wall structure 220 and is used for plug welding connection with the middle lifting lug reinforcing plate 440 and the middle lifting lug sleeve 450; and rivet nut mounting holes G225 are designed on the bosses on the two sides of the convex thin-wall structure 220 and used for mounting the battery module. The rivet nut mounting hole E213 of the inverted U-shaped thin-wall structure 210 corresponds to the rivet nut mounting hole G225 and is used for mounting a battery module; the two ends of the inverted U-shaped thin-wall structure 210 in the length direction are provided with flanges D211 for core-pulling rivet connection with the No. 2 frame 120 and the No. 4 frame 140; a lifting lug mounting hole a212 is formed in the middle of the inverted U-shaped thin-walled structure 210, and corresponds to the lifting lug mounting hole B223 in position for mounting the middle lifting lug 400. The inverted U-shaped thin-wall structure 210 is provided with lightening holes A214, and the convex-shaped thin-wall structure 220 is provided with lightening holes B226 for realizing light weight; the beam 200 is arranged in parallel with the frame No. 1110 or the frame No. 3 130.
Fig. 4(a) is an exploded view of the middle lug 400 of the present invention, wherein the middle lug 400 is made of steel, and is composed of a middle lug body 410, a middle lug nut 420, a seal ring 430, a middle lug reinforcement plate 440, and a middle lug sleeve 450. Fig. 4(b) and (c) are a schematic view of the assembly relationship and a cross-sectional view of the intermediate lifting lug 400, respectively, wherein the intermediate lifting lug body 410 is a cylindrical hollow structure, and is internally provided with threads for threaded engagement with the hollow intermediate lifting lug nut 420; the top of the middle lifting lug body 410 is provided with an O-shaped groove 411 for placing a sealing ring 430 to ensure the sealing property between the middle lifting lug nut 420 and the middle lifting lug body 410, and when in actual use, the battery pack upper shell is fixed between the middle lifting lug nut 420 and the middle lifting lug body 410; the bottom of the middle lifting lug body 410 is provided with a cylindrical groove 412; the cross sections of the middle lifting lug reinforcing plate 440 and the middle lifting lug sleeve 450 are of inverted U-shaped thin-wall structures 210, a middle lifting lug mounting hole A441 is formed in the middle of the middle lifting lug reinforcing plate 440, and a middle lifting lug mounting hole B451 is formed in the middle of the middle lifting lug sleeve 450 and used for mounting the middle lifting lug body 410; plug welding process holes B442 are formed in two side walls of the middle lifting lug reinforcing plate 440 and are used for being connected with the cross beam 200 in a plug welding mode; the intermediate shackle body 410 is penetratingly mounted in the intermediate shackle reinforcement plate 440 and the intermediate shackle sleeve 450; the middle lifting lug body 410 is connected with the middle lifting lug reinforcing plate 440 through MIG welding, and airtightness of the battery pack is guaranteed.
Fig. 5 is a schematic structural diagram of a bottom plate 500 of the present invention, where the bottom plate 500 is a steel plate stamping part; the bottom plate 500 is stamped with a reinforcing rib 501 along the normal direction for improving the rigidity, strength and NVH performance of the bottom plate; glue coating grooves 502 are formed in the periphery of the bottom plate 500 and are used for being connected with No. 1-4 frames in a gluing mode, and air tightness of the battery pack is guaranteed; the bottom plate 500 is designed with a middle lifting lug mounting hole C503 at the mounting position of the cross beam 200 for mounting the middle lifting lug 400.
Fig. 6(a) and (b) are schematic cross-sectional views of the longitudinal beam 300 of the present invention, respectively, wherein the longitudinal beam 300 is made of steel and can be manufactured by stamping or roll forming; the stringer 300 has a cross-sectional shape of a zigzag. Fig. 7(a), (b), (c) are schematic diagrams of connection relationships between the longitudinal beam 300 and the frame structure 100, the cross beam 200 and the bottom plate 500 of the present invention, respectively, the lower surface of the bottom flange of the longitudinal beam 300 is attached to the upper surface of the frame flange a116 No. 1, the upper surface of the frame flange a116 No. 3, the upper surface of the bottom plate 500 and the upper surface of the bottom flange D221 of the cross beam 200, respectively, the upper surface of the flange a116 is connected to the lower surface of the bottom flange of the longitudinal beam 300 by self-piercing riveting, and the upper surfaces of the bottom plate 500 and the flange D221 are connected to the; flanges F301 are arranged at two ends of the longitudinal beam 300 in the length direction, one end of the longitudinal beam is used for being connected with the No. 1 frame 110 and the No. 3 frame 130 in an adhesive mode, and the other end of the longitudinal beam is used for being welded with the transverse beam 200 in an MIG mode; the arrangement direction of the longitudinal beam 200 is parallel to the No. 2 frame 120 or the No. 4 frame 140.
Fig. 8 is the utility model discloses No. 2 frames 120 and No. 4 frames 140 of structure and crossbeam 200 relation schematic diagram, No. 2 frames 120 and No. 4 frames 140's rivet mounting hole 126 and crossbeam 200 both ends turn-ups D211, turn-ups E222 correspond, and No. 2 frames 120 and No. 4 frames 140 are connected through self-plugging rivet 700 with crossbeam 200.
Fig. 9 is a schematic view of the connection relationship between the frames 1 and 3 130 and the bottom plate 500 of the present invention, wherein the lower surfaces of the flanges a116 of the frames 1 and 3 130 are attached to the upper surface of the bottom plate 500; the No. 1 frame 110 and the No. 3 frame 130 are connected with the bottom plate 500 through two processes of gluing and self-piercing riveting, the self-piercing rivets are located on the inner ring, and the gluing is located on the outer ring, so that the mechanical strength and the air tightness of the battery pack are guaranteed.
Fig. 10 is a schematic view of the connection relationship between the No. 2 frame 120 and the No. 4 frame 140 and the bottom plate 500, and the lower surfaces of the flanges B125 of the No. 2 frame 120 and the No. 4 frame 140 are attached to the upper surface of the bottom plate 500; the No. 2 frame 120 and the No. 4 frame 140 are connected with the bottom plate 500 through two processes of gluing and self-piercing riveting, the self-piercing rivets are located on the inner ring, and the sealant is located on the outer ring, so that the mechanical strength and the air tightness of the battery pack are guaranteed.
Fig. 11 is a schematic view of the connection relationship between the cross beam 200 and the bottom plate 500 according to the present invention, wherein the lower surface of the turned-over edge C221 of the cross beam 200 is attached to the upper surface of the bottom plate 500; the beam 200 and the base plate 500 are connected by a resistance spot welding process.
Fig. 12(a) is a schematic view of the connection relationship between the middle lifting lug 400 and the cross beam 200 and the bottom plate 500 and a cross-sectional view thereof, wherein the middle lifting lug reinforcing plate 410 is externally embedded to the thin-wall structure 220 shaped like a Chinese character 'tu', from top to bottom, and the plug welding process hole B442 of the middle lifting lug reinforcing plate 440 corresponds to the plug welding process hole a 224; the middle lifting lug sleeve 450 is embedded into the convex thin-wall structure 220 from bottom to top; the center lug reinforcement plate 440, the center lug sleeve 450, and the "crowned" thin-walled structure 220 are connected by a plug welding process. The middle lifting lug body 410 is penetratingly mounted in the middle lifting lug mounting hole B223 and the middle lifting lug mounting hole C503; the bottom of the middle lifting lug body 410 is connected with the middle lifting lug mounting hole 503 by MIG welding, so that the air tightness of the battery pack is ensured.
Fig. 13 is the assembly relation schematic diagram of the battery module of the present invention with the frame structure 100 and the beam 200, the bolt holes are opened at four angular positions of the battery module, the bolt holes are connected with the rivet nuts 800 embedded in the frame structure 100 and the beam 200, and the fastening connection of the battery module with the frame structure 100 and the beam 200 is realized.
Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for designers in this technical field, several improvements (for example, by changing the length of the frame or the number of the beams, the number of the battery pack modules can be extended or reduced, or a similar structure can be provided, or the aluminum alloy can be replaced by a light material such as magnesium alloy or engineering plastic) in advance without departing from the principle of the present invention, the present invention should be considered as the protection scope.
Claims (10)
1. The utility model provides a lower casing of steel aluminium hybrid battery package, includes frame structure (100), crossbeam (200) and bottom plate (500), its characterized in that: the lower shell further comprises a middle lifting lug (400), and the middle lifting lug (400) penetrates through the cross beam (200) and the bottom plate (500) from top to bottom and is fixed with the cross beam (200) and the bottom plate (500); frame structure (100) are formed by four frames concatenation, crossbeam (200) are by type of falling U thin-walled structure (210) embedded to "protruding" font thin-walled structure (220) and constitute, middle lug (400) are including cylindrical hollow structure's middle lug body (410), and middle lug body (410) top cooperates with middle lug nut (420), and the lower extreme is installed in proper order in middle lug reinforcing plate (440) and middle lug sleeve (450), and middle lug body (410) is connected with middle lug reinforcing plate (440) MIG welding.
2. The lower case of the steel-aluminum hybrid battery pack according to claim 1, wherein: the four frames are divided into two groups, and each group of frames are identical in structure and are arranged oppositely.
3. The lower case of the steel-aluminum hybrid battery pack according to claim 2, wherein: the first group of frames are integrally formed by a square-shaped cavity structure (111), a square-shaped cavity structure A (112) and a triangular cavity structure A (113) which are sequentially arranged, the square-shaped cavity structure (111) is located in the inner side direction of the battery pack, lower ribs A (115) of the square-shaped cavity structure A (112) are obliquely arranged, a turned edge A (116) extends from the bottom of the square-shaped cavity structure (111) in the inner side direction of the battery pack and is connected with a bottom plate (500) through self-punching rivets and glue, the self-punching rivets are located on inner rings, and the glue is located on outer rings; the group of frames are connected with turnups E (222) at two ends of the length direction of the convex thin-wall structure (220) in a core pulling and riveting mode.
4. The lower case of the steel-aluminum hybrid battery pack according to claim 2, wherein: the second group of frames are integrally formed by a mesh-shaped cavity structure B (121) and a triangular cavity structure B (122) which are sequentially arranged, the mesh-shaped cavity structure B (121) is positioned in the inner side direction of the battery pack, lower ribs B (124) of the mesh-shaped cavity structure B (121) are obliquely arranged, and a turned edge B (125) extends from the bottom of the mesh-shaped cavity structure B (121) along the inner side direction of the battery pack and is connected with the bottom plate (500) through self-piercing riveting and gluing; the group of frames are connected with turned edges D (211) at two ends of the inverted U-shaped thin-wall structure (210) in the length direction through core pulling and riveting.
5. The lower case of the steel-aluminum hybrid battery pack according to claim 1, wherein: a lifting lug mounting hole B (223) is formed in the upper surface of the convex thin-wall structure (220), a lifting lug mounting hole A (212) is formed in the middle of the inverted U-shaped thin-wall structure (210), and the lifting lug mounting hole A (212) and the lifting lug mounting hole B (223) are matched with the middle lifting lug mounting hole A (441) and the middle lifting lug mounting hole B (451); the inner side wall in the middle of the convex thin-walled structure (220) is provided with a plug welding process hole A (224), and the plug welding process hole A (224) is matched with plug welding process holes B (442) in two side walls of the middle lifting lug reinforcing plate (440) to realize plug welding connection of the middle lifting lug (400) and the cross beam (200).
6. The lower case of the steel-aluminum hybrid battery pack according to claim 1, wherein: the inverted U-shaped thin-wall structure (210) is provided with a lightening hole A (214), and the convex thin-wall structure (220) is provided with a lightening hole B (226).
7. The lower case of the steel-aluminum hybrid battery pack according to claim 3, wherein: the lower shell further comprises a longitudinal beam (300), and the lower surface of a flanging at the bottom of the longitudinal beam (300) is attached to the upper surface of the flanging A (116) and is in self-piercing riveting connection; the lower surface of a flanging at the bottom of the longitudinal beam (300) is also attached to the upper surface of the bottom plate (500) and the upper surface of the flanging C (221), and is connected with the upper surface of the flanging C (221) through resistance spot welding; flanges F (301) are arranged at two ends of the longitudinal beam (300) in the length direction, one end of the longitudinal beam is connected with the first group of frames in an adhesive mode, and the other end of the longitudinal beam is welded with the cross beam (200) in an MIG mode.
8. The lower case of the steel-aluminum hybrid battery pack according to any one of claims 1 to 7, wherein: the frame structure (100) is made of aluminum alloy, and the cross beam (200), the longitudinal beam (300), the middle lifting lug (400) and the bottom plate (500) are all made of steel.
9. The lower case of the steel-aluminum hybrid battery pack according to claim 8, wherein: the frame structure (100) is manufactured by extrusion.
10. The lower case of the steel-aluminum hybrid battery pack according to claim 8, wherein: the transverse beam (200) and the longitudinal beam (300) are formed by stamping or rolling.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921324928.XU CN210607353U (en) | 2019-08-15 | 2019-08-15 | Lower shell of steel-aluminum hybrid battery pack |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921324928.XU CN210607353U (en) | 2019-08-15 | 2019-08-15 | Lower shell of steel-aluminum hybrid battery pack |
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| CN210607353U true CN210607353U (en) | 2020-05-22 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110544755A (en) * | 2019-08-15 | 2019-12-06 | 江苏大学 | lower shell of steel-aluminum hybrid battery pack |
| CN112117410A (en) * | 2020-09-16 | 2020-12-22 | 东风汽车集团有限公司 | Power battery lower box body |
| WO2022086007A1 (en) * | 2020-10-23 | 2022-04-28 | 주식회사 엘지에너지솔루션 | Battery pack and device comprising same |
| CN114583355A (en) * | 2020-11-30 | 2022-06-03 | 宝钢金属有限公司 | Section bar for new energy automobile battery pack shell and manufacturing method thereof |
| CN114583347A (en) * | 2020-11-30 | 2022-06-03 | 宝钢金属有限公司 | Steel battery pack shell of new energy automobile |
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2019
- 2019-08-15 CN CN201921324928.XU patent/CN210607353U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110544755A (en) * | 2019-08-15 | 2019-12-06 | 江苏大学 | lower shell of steel-aluminum hybrid battery pack |
| CN112117410A (en) * | 2020-09-16 | 2020-12-22 | 东风汽车集团有限公司 | Power battery lower box body |
| WO2022086007A1 (en) * | 2020-10-23 | 2022-04-28 | 주식회사 엘지에너지솔루션 | Battery pack and device comprising same |
| CN114583355A (en) * | 2020-11-30 | 2022-06-03 | 宝钢金属有限公司 | Section bar for new energy automobile battery pack shell and manufacturing method thereof |
| CN114583347A (en) * | 2020-11-30 | 2022-06-03 | 宝钢金属有限公司 | Steel battery pack shell of new energy automobile |
| CN114583355B (en) * | 2020-11-30 | 2023-06-20 | 宝钢金属有限公司 | Section bar for battery pack shell of new energy automobile and manufacturing method thereof |
| CN114583347B (en) * | 2020-11-30 | 2024-01-30 | 宝钢金属有限公司 | Steel battery pack shell of new energy automobile |
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