CN115224413A - Lightweight battery box - Google Patents
Lightweight battery box Download PDFInfo
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- CN115224413A CN115224413A CN202210751628.XA CN202210751628A CN115224413A CN 115224413 A CN115224413 A CN 115224413A CN 202210751628 A CN202210751628 A CN 202210751628A CN 115224413 A CN115224413 A CN 115224413A
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- box body
- frame
- battery box
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- 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
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
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- 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
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- 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
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- 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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/236—Hardness
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- 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
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- 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
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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 invention discloses a lightweight battery box body which comprises an upper cover and a lower box body, wherein the lower box body comprises a frame, a transverse longitudinal beam and a bottom plate which are connected in a gluing way, the bottom plate is of a sandwich layer plate structure or a multi-cavity profile structure, the frame and the transverse longitudinal beam are of the multi-cavity profile structure, and the multi-cavity profile structure is formed by continuous fiber composite materials in a pultrusion way; the inner surface layer and the outer surface layer of the continuous fiber composite material are continuous fiber fabrics, and the middle filling layer is continuous fiber yarn; the raw materials of the continuous fiber composite material comprise continuous fibers and resin impregnated on the continuous fibers, wherein the continuous fibers are selected from one or more of carbon fibers, glass fibers and aramid fibers, and the resin is selected from one or more of epoxy resin and polyurethane resin. Compared with the traditional battery box body, the battery box body is lightened by more than 50%, the installation precision and the material utilization rate are high, and the cost is effectively reduced on the basis of meeting the functional requirements of multiple aspects such as structural rigidity, strength and weight, heat insulation, NVH (noise vibration and harshness) and the like.
Description
Technical Field
The invention belongs to the technical field of battery application, and particularly relates to a lightweight battery box body.
Background
The light weight of the new energy automobile has important significance for improving the mileage of the automobile, improving the performance of the automobile, saving energy and reducing emission. The mass of the battery pack accounts for 18-30% of the mass of the whole vehicle system, and the mass of the box body accounts for about 20% of the total mass of the battery pack. The light weight of the battery box body obviously contributes to the light weight of the whole vehicle. Meanwhile, the torsional rigidity and the collision safety characteristic of the whole vehicle can be effectively improved by adopting materials with high specific strength and high specific rigidity and a design scheme cooperating with a vehicle body structure.
The weight reduction of the battery box body can be started from multiple angles, and firstly, materials with high specific strength and specific rigidity are used; the other angle is that integration and optimization are carried out on the structural design, the structural redundancy is reduced, and the structural efficiency is improved. Meanwhile, the battery box body is used as a bearing of a sensitive energy storage system (electrochemical power battery), so that the structural rigidity and weight requirements are met, and the functional requirements in multiple aspects such as heat insulation, insulation and NVH (noise, vibration and harshness) are met.
In the prior art, the battery box body is usually made of metal materials such as steel and aluminum, the upper cover of the battery box, the frame of the lower box body, the transverse and longitudinal beams and the bottom plate structure are formed through processes such as stamping, pultrusion and die-casting, the weight of the structure is heavy, and the disadvantage of heat management is brought due to the high heat conductivity of metal. Therefore, the battery case structure may add an additional heat insulating layer to the inside and outside thereof, thereby adding additional weight and cost. The metal box body is mostly assembled by adopting a welding process, the overall precision is lower, in addition, the tolerance accumulation in the welding process of the lower box body can greatly reduce the dimensional precision of the battery box body, and certain difficulty and problems can be brought to the product quality, the subsequent whole package assembly and the vehicle loading work; in addition, the upper cover and the bottom plate of the box body are made of metal materials, inherent defects exist in meeting the requirements of thermal runaway and NVH, and therefore, additional protective coatings have to be added to improve related performances. For the lower box body, the complex structure and the stress form bring challenges to the application of the composite material, and the economy of the lower box body is also a main challenge to the application of the composite material on the box body in a large area.
Disclosure of Invention
The technical problem to be solved is as follows: aiming at the technical problems, the invention provides a lightweight battery box body which is lightened by more than 50 percent compared with the traditional battery box body, has high installation precision and material utilization rate, and effectively reduces the cost on the basis of meeting the functional requirements of various aspects such as structural rigidity, strength, weight, heat insulation, NVH (noise, vibration and harshness) and the like.
The technical scheme is as follows: a lightweight battery box body comprises an upper cover and a lower box body, wherein the lower box body comprises a frame, a transverse girder and a bottom plate which are connected in a gluing manner, the frame is arranged on the periphery of the bottom plate, and the transverse girder is arranged on the upper surface of the bottom plate; the bottom plate is of a sandwich laminate structure or a multi-cavity profile structure, the frame and the transverse and longitudinal beams are of a multi-cavity profile structure, and the bottom plate, the frame and the transverse and longitudinal beams are all formed by pultrusion of continuous fiber composite materials; the continuous fiber composite material comprises an inner surface layer, an outer surface layer and a middle filling layer, wherein the inner surface layer and the outer surface layer are continuous fiber fabrics, and the middle filling layer is continuous fiber yarn; the raw materials of the continuous fiber composite material comprise continuous fibers and resin impregnated on the continuous fibers, wherein the continuous fibers are selected from one or more of carbon fibers, glass fibers and aramid fibers, and the resin is selected from one or more of epoxy resin and polyurethane resin.
Preferably, after the continuous fiber composite material is molded into the bottom plate, the thickness of the middle filling layer accounts for 25% -80% of the wall thickness of the profile.
Preferably, after the continuous fiber composite material is molded into a transverse girder or a frame, the thickness of the middle filling layer accounts for 40% -80% of the wall thickness of the profile.
Preferably, the sandwich plate structure comprises an upper laminated plate, a middle sandwich layer and a lower laminated plate, the thickness of the upper laminated plate and the thickness of the lower laminated plate are both 0.5 to 2mm, and the thickness of the middle sandwich layer is 5 to 20mm.
Preferably, the raw material of the intermediate sandwich layer is foam, and the foam is selected from one of PET, PU, PVC, PMI or balsa wood.
Preferably, the glue joint adopts structural adhesive as adhesive, and the structural adhesive is epoxy adhesive, polyurethane adhesive or acrylic acid structural adhesive.
Preferably, the frame and the frame are connected by a metal inserting lug type joint.
Preferably, the glue layer thickness of the glue joint of the frame and the metal splicing lug type joint is 1-2mm.
Preferably, the transverse longitudinal beam and the frame are glued through corner pieces, and the thickness of the glue layer is 0.2 to 1.5mm.
Preferably, the thickness of the glue layer formed by gluing the transverse longitudinal beam and the bottom plate and the thickness of the glue layer formed by gluing the frame and the bottom plate are 0.5-3mm.
Has the advantages that: the battery box body is prepared by utilizing the characteristics of high strength and high rigidity ratio of the continuous fiber composite material, and the weight of the battery box body can be greatly reduced by more than 50%. Meanwhile, aiming at the bearing performance requirements and load forms of different parts, the invention mixedly applies a plurality of structural process forms, fully utilizes the anisotropy of the continuous fiber composite material, and realizes the balance of mechanical properties and economy to the maximum extent. The continuous fiber composite material is used in a large amount, so that the thermal diffusion performance requirement, the heat insulation requirement and the NVH performance requirement of the bottom plate of the battery box body are met, and the integration of the structure, the material and the function is realized.
The invention mainly realizes the assembly of the battery box body by gluing, can realize tolerance compensation and improves the integral precision of the battery box body; the extrusion process is used on the frame, the transverse and longitudinal beams and the bottom plate structure in a large proportion, so that the material utilization rate is improved, and the problems of the forming process and the cost of the complex structure of the lower box body are solved.
Drawings
FIG. 1 is a schematic view of the structure of a battery case;
FIG. 2 is a disassembled structural view of a battery case;
FIG. 3 is a cross-sectional view of the transom;
FIG. 4 is a cross-sectional view of a bezel;
FIG. 5 is a schematic illustration of the gluing of the cross and longitudinal beams to the floor;
FIG. 6 is a schematic diagram of the glue joint between the frames;
FIG. 7 is a schematic diagram of the glue joint between the cross and longitudinal beams and the frame;
FIG. 8 is a schematic diagram of the bonding of the frame and the base plate;
the numerical designations in the drawings represent the following: 1. an upper cover; 2. a frame; 3. a transverse girder; 4. a base plate; 5. laying layers on the inner surface; 6. paving the outer surface; 7. an intermediate filling layer; 8. structural adhesive; 9. a metal plug-in lug type joint; 10. and (7) corner pieces.
Detailed Description
The invention is further described below with reference to the accompanying drawings and specific embodiments.
Example 1
As shown in FIG. 1, the light battery box comprises an upper cover 1 and a lower box body, wherein the upper cover 1 and the lower box body are assembled through bolts. As shown in fig. 2, the main body bearing part of the lower box body comprises a frame 2, a transverse longitudinal beam 3 and a bottom plate 4, which are mutually glued through metal joints and are assembled in a mechanical connection mode in a matching way, and the connection fastener can be in the types of bolts, rivet rivets, blind rivets and the like. Frame 2 and horizontal longeron 3 all set up the upper surface at bottom plate 4, frame 2 is located bottom plate 4 all around respectively, horizontal longeron 3 distributes in the inside of frame 2.
In terms of structural design, according to the performance requirements of different parts of the lower box body, the bottom plate 4 is designed to be of a sandwich plate structure or a multi-cavity section structure, and the frame 2 and the transverse and longitudinal beams 3 are of multi-cavity section structures and can be made of composite materials or a combination of composite materials and metal section materials; the frame 2 and the frame 2 are connected by adopting a metal inserting lug type joint 9, the transverse longitudinal beam 3 and the frame 2 are connected by gluing through a corner piece 10, and the joints can be designed into sectional materials or thin plate structures according to the requirements of performance, space and cost. After the continuous fiber composite material is formed into the bottom plate, the thickness of the middle filling layer accounts for 25% -80% of the wall thickness of the profile. After the continuous fiber composite material is formed into a transverse girder or a frame, the thickness of the middle filling layer accounts for 40% -80% of the wall thickness of the section.
In terms of material selection, the multi-cavity profile structure is formed by pultrusion of a continuous fiber composite material; the continuous fiber composite material comprises an inner surface layer 5, an outer surface layer 6 and a middle filling layer 7, wherein the inner surface layer 5 and the outer surface layer 6 are continuous fiber fabrics, and the middle filling layer 7 is continuous fiber yarn; the raw materials of the continuous fiber composite material comprise continuous fibers and resin impregnated on the continuous fibers, wherein the continuous fibers are selected from one or more of carbon fibers, glass fibers and aramid fibers, and the resin is selected from one or more of epoxy resin and polyurethane resin. The metal inserting lug type joint 9 and the angle piece 10 are made of alloy steel or aluminum alloy materials. The glue joint adopts the structural adhesive 8 as an adhesive, and the structural adhesive 8 is an epoxy adhesive, a polyurethane adhesive or an acrylic acid structural adhesive 8. A foam sandwich is arranged in the bottom plate 4, and the foam is selected from one of PET, PU, PVC, PMI or balsa wood.
In the preparation process, through pultrusion processes (fabric pultrusion, pulling and weaving, pulling and winding and the like), fibers in a direction of non-0 degrees can be added, and the torsion resistance and the impact resistance of the structure are improved; the metal inserting lug type joint 9 can be formed by adopting the technological modes of pultrusion, casting, machining and the like; the corner piece 10 may be formed by stamping, pultrusion, casting, or the like.
Example 2
As shown in fig. 3 and 4, in the present embodiment, the side frame 2 and the longitudinal and transverse beams 3 are of a multi-cavity profile structure. The wall thickness of the frame 2 is 3-4 mm, 1-2 layers of carbon fiber or glass fiber 4 axial (0 degrees, 90 degrees, +45 degrees, -45 degrees) NCF fabrics are adopted for the outer surface layer 6 and the inner surface layer 5 respectively, the total thickness of the fabrics is 1-2mm, and the middle filling layer 7 between the inner surface layer fabric and the outer surface layer fabric is filled with carbon fiber unidirectional yarns and is 2-3mm. The wall thickness of the transverse longitudinal beam 3 is 2-4 mm, 1-2 layers of carbon fiber or glass fiber 3-4 axial (0 degrees, +45 degrees, -45 degrees) NCF fabrics are respectively adopted for the outer surface layer 6 and the inner surface layer 5, the total thickness of the fabrics is 0.35-1 mm, and a middle filling layer 7 in the middle of the inner surface layer fabric and the outer surface layer fabric is filled with carbon fiber unidirectional yarns. The resin is special epoxy resin for pultrusion.
The preparation process of the frame 2 and the transverse and longitudinal beams 3 comprises the following steps:
s1: stock preparation
The unidirectional yarn is placed on a creel with adjustable tension, a reel made of fabric is placed on a material rest with tension control, the unidirectional yarn, the fabric and the fireproof felt are led out according to the process requirements, and meanwhile, the tension of the unidirectional yarn and the tension of the reel of the fabric and the fireproof felt are adjusted.
S2: impregnating resins
The unidirectional yarn, the fabric and the fireproof felt on the material rack sequentially pass through the cloth guide roller respectively and enter a heating constant-temperature resin glue tank to be impregnated with epoxy resin, the resin content is controlled by clamping the glue squeezing roller, glue solution in the glue tank is continuously and circularly updated, resin viscosity increase caused by solvent volatilization in the glue solution is prevented, the glue squeezing roller is used for further impregnating the unidirectional yarn, the fabric and the fireproof felt material with the resin, the glue content is controlled and the air is exhausted, and the cloth guide roller is used for separating the unidirectional yarn and the fabric impregnated with the resin from the fireproof felt, so that reasonable distribution according to technological requirements is ensured.
S3: preforming
The unidirectional yarn and fabric soaked with the epoxy resin and the fireproof felt are further arranged uniformly, redundant resin is removed, air bubbles are removed, and the shape of the unidirectional yarn and fabric soaked with the epoxy resin gradually forms the shape of an inlet of a curing mold.
S4: curing of
Controlling the temperature of a die opening to be 60-120 ℃, entering a pultrusion die, heating in a multi-section mode at the temperature of 70-120 ℃, 120-180 ℃ and 180-230 ℃, and pultrusion at the pultrusion speed of 0.2-3 m/min according to different product structures to form a frame 2;
the extruded frame 2 is pulled into a post-curing heating furnace for thermal stress treatment and post-curing, and the post-curing heating furnace is heated in multiple sections at the temperature of 230-175 ℃, 175-120 ℃ and 120-70 ℃;
and curing to obtain a frame 2 of the battery box body with the thickness of 0.5mm to 5mm.
S5: traction apparatus
After post-curing, the traction force is adjusted according to the shape and the size of the pultruded product, the traction force can be adjusted within 50-100 kN, the product is pulled out through a crawler-type or reciprocating type traction mechanism after being adjusted, the traction speed is adjusted in a stepless manner, and the traction speed is set according to the process requirements.
S6: cutting of
The cutting is carried out in the continuous production process, when the length of the product meets the requirement, the end part of the product reaches the position for controlling the length, the controller is communicated with the cutting motor circuit, and the cutting device starts to work. Firstly, the product is held tightly by a clamp provided with a rubber pad, and then the alloy cutter is used for cutting the product into the required frame 2.
In this embodiment, the base plate 4 is made of a sandwich laminate structure by a mold pressing or RTM molding process, and specifically, is made of a continuous fiber sandwich foam sandwich structure. The sandwich layer plate structure comprises an upper laminated plate, a middle sandwich layer and a lower laminated plate, wherein the thicknesses of the upper laminated plate and the lower laminated plate are 0.5 to 2mm, and the thickness of the middle sandwich layer is 5 to 20mm. The foam of the middle sandwich layer is PU foam with resin permeation holes and is formed by an HP-RTM process. The upper cover 1 is made of glass fiber fabric and epoxy resin. The metal plug-in lug sheet type joint 9 adopts an aluminum alloy pultrusion section bar, and the corner sheet 10 adopts an aluminum alloy stamping section bar.
After the frame 2, the transverse and longitudinal beams 3, the bottom plate 4 and the connecting joints are finished, positioning and assembling all parts on a lower box body tool respectively; the assembly process of the frame 2 and the frame 2 adopts a glue injection technology, firstly, the aluminum alloy joint lug is inserted into a frame profile cavity of the frame 2, a glue injection gun is used for injecting structural glue 8 through a glue injection hole in the frame 2, then, the structural glue 8 is heated and cured to complete connection, and as shown in figure 6, the thickness of the glue layer is 1 to 2mm. The transverse longitudinal beam 3 and the frame 2 are connected through an aluminum alloy corner piece 10 by adopting a gluing technology, the thickness of a glue layer is 0.2-1.5 mm, the structural glue 8 is uniformly coated on the connecting piece after surface treatment, the connecting piece is clamped and attached to the connected piece through the movement of a tool, and then the connection is completed through heating and curing, as shown in fig. 7. The transverse longitudinal beam 3 and the bottom plate 4, and the frame 2 and the bottom plate 4 are glued by adopting a gluing technology, and the thickness of the glue layer is 0.5-3 mm, as shown in figure 8.
The specific strength of the traditional steel is 153 MPa/(g/cm) 3 ) The specific stiffness is 26 GPa/(g/cm) 3 ) (ii) a The specific strength of the aluminum alloy is 151 MPa/(g/cm) 3 ) The specific stiffness is 26 GPa/(g/cm) 3 ) (ii) a The specific strength of the carbon fiber composite material laminated board is 506 to 1100 MPa/(g/cm) 3 ) The specific stiffness is 38 to 81 GPa/(g/cm) 3 ) (ii) a The specific strength of the glass fiber composite material laminated board is 410 to 898 MPa/(g/cm) 3 ) The specific stiffness is 13 to 28 GPa/(g/cm) 3 ) (ii) a The density of the sandwich material in the sandwich core structure is usually 200 kg/m 3 Therefore, the sandwich structure adopted in the embodiment has higher rigidity and higher lightweight effect than the traditional laminated board.
The heat conduction coefficient of the carbon fiber composite material is 0.6 to 6W/m.K, the heat conductivity of the glass fiber composite material is 0.06 to 0.08W/m.K, and the glass fiber composite material has good heat insulation performance.
The glass fiber can be molten at the thermal diffusion temperature, so that the flame is prevented from penetrating out, and the glass fiber has good heat release and diffusion properties.
The continuous fiber composite material belongs to a high polymer material, has large vibration damping and good NVH (noise vibration harshness) performance.
Claims (10)
1. The light-weight battery box body is characterized by comprising an upper cover (1) and a lower box body, wherein the lower box body comprises a frame (2), a transverse and longitudinal beam (3) and a bottom plate (4) which are connected in a gluing mode, the frame (2) and the transverse and longitudinal beam (3) are arranged on the upper surface of the bottom plate (4), the frame (2) is arranged on the periphery of the bottom plate (4) respectively, and the transverse and longitudinal beams (3) are distributed inside the frame (2); the bottom plate (4) is of a sandwich layer plate structure or a multi-cavity profile structure, the frame (2) and the transverse and longitudinal beams (3) are of multi-cavity profile structures, and the multi-cavity profile structures are formed by continuous fiber composite materials in a pultrusion mode; the continuous fiber composite material comprises an inner surface layer (5), an outer surface layer (6) and a middle filling layer (7), wherein the inner surface layer (5) and the outer surface layer (6) adopt continuous fiber fabrics, and the middle filling layer (7) adopts continuous fiber yarns; the raw materials of the continuous fiber composite material comprise continuous fibers and resin impregnated on the continuous fibers, wherein the continuous fibers are selected from one or more of carbon fibers, glass fibers and aramid fibers, and the resin is selected from one or more of epoxy resin and polyurethane resin.
2. The lightweight battery box body as claimed in claim 1, wherein in the continuous fiber composite material formed into the bottom plate (4), the thickness of the intermediate filling layer (7) accounts for 25% -80% of the thickness of the wall of the profile.
3. The lightweight battery box body as claimed in claim 1, wherein in the continuous fiber composite material formed into the transverse and longitudinal beams (3) or the side frames (2), the thickness of the middle filling layer (7) accounts for 40% -80% of the wall thickness of the profile.
4. The lightweight battery box body as claimed in claim 1, wherein the sandwich layer plate structure comprises an upper laminated plate, a middle sandwich layer and a lower laminated plate, the thickness of the upper laminated plate and the thickness of the lower laminated plate are both 0.5-2mm, and the thickness of the middle sandwich layer is 5-20 mm.
5. The light-weight battery box body as claimed in claim 4, wherein the material of the middle sandwich layer is foam, and the foam is selected from one of PET, PU, PVC, PMI or balsa wood.
6. The lightweight battery box body according to claim 1, wherein the structural adhesive (8) is adopted for the adhesive bonding, and the structural adhesive (8) is epoxy adhesive, polyurethane adhesive or acrylic structural adhesive.
7. The light-weight battery box body is characterized in that the frame (2) and the frame (2) are connected by adopting metal insertion lug type joints (9).
8. The light-weight battery box body according to claim 7, characterized in that the glue layer thickness of the glue joint between the frame (2) and the metal insertion lug type joint (9) is 1-2mm.
9. The lightweight battery box body according to claim 1, wherein the transverse longitudinal beam (3) and the frame (2) are glued through corner pieces (10), and the thickness of a glue layer is 0.2 to 1.5mm.
10. The lightweight battery box body as claimed in claim 1, wherein the glue layer thickness of the glue joint of the transverse longitudinal beam (3) and the bottom plate (4) and the glue layer thickness of the glue joint of the frame (2) and the bottom plate (4) are 0.5-3 mm.
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| CN202210751628.XA CN115224413A (en) | 2022-06-28 | 2022-06-28 | Lightweight battery box |
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| CN202210751628.XA CN115224413A (en) | 2022-06-28 | 2022-06-28 | Lightweight battery box |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117134056A (en) * | 2023-10-26 | 2023-11-28 | 杭州卡涞复合材料科技有限公司 | Lower box body of multi-material composite power battery |
| CN117154313A (en) * | 2023-10-26 | 2023-12-01 | 杭州卡涞复合材料科技有限公司 | Lower box of power battery |
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| CN104669370A (en) * | 2013-11-27 | 2015-06-03 | 上海杰事杰新材料(集团)股份有限公司 | Reinforced container bottom plate and manufacturing method thereof |
| CN105947235A (en) * | 2016-05-10 | 2016-09-21 | 国防科学技术大学 | Electric energy and mechanical environment management multifunctional structure |
| CN207558843U (en) * | 2017-08-28 | 2018-06-29 | 比亚迪股份有限公司 | Battery tray |
| CN109755434A (en) * | 2019-01-15 | 2019-05-14 | 康得复合材料有限责任公司 | The battery tray of carbon fibre composite |
| CN111907093A (en) * | 2020-06-24 | 2020-11-10 | 杭州卡涞复合材料科技有限公司 | Method for quickly forming frame of automobile composite material battery box |
| CN111907092A (en) * | 2020-07-22 | 2020-11-10 | 杭州卡涞复合材料科技有限公司 | RTM (resin transfer molding) method for sandwich structure of automobile composite material battery box |
| CN213936421U (en) * | 2020-12-08 | 2021-08-10 | 杭州卡涞复合材料科技有限公司 | Box connection structure under car combined material battery box |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117134056A (en) * | 2023-10-26 | 2023-11-28 | 杭州卡涞复合材料科技有限公司 | Lower box body of multi-material composite power battery |
| CN117154313A (en) * | 2023-10-26 | 2023-12-01 | 杭州卡涞复合材料科技有限公司 | Lower box of power battery |
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