CN110148690A - A kind of carbon fibre composite Battery case and the automobile containing the Battery case - Google Patents

Abstract

The invention discloses a carbon fiber composite material battery box and a car containing the battery box. The battery box includes an upper shell and a lower shell made of carbon fiber composite materials, and the lower flange of the upper shell and the lower shell are The upper end face of the upper shell and/or the lower shell are sealed and connected, and a thickened outer ring is arranged around the upper shell and/or the lower shell, and the thickened outer ring is filled with a second material sandwich layer. The battery box of the invention has a higher degree of integration, fewer parts and lighter weight, and effectively improves the compressive performance of the carbon fiber composite battery box.

Description

A carbon fiber composite material battery box and a car containing the battery box

technical field

The invention belongs to the technical field of automobiles, and specifically refers to a carbon fiber composite material battery box and an automobile containing the battery box.

Background technique

In recent years, with the rapid development of the motor vehicle economy, the production and use of motor vehicles have increased rapidly, and the pollution of motor vehicle exhaust to the environment has become increasingly serious. The air pollution in many large cities has shifted from coal-fired pollution to coal-fired and motor vehicles. Mixed pollution, motor vehicle exhaust pollution has serious harm to the environment and people's health. The pollution has attracted social attention, and the state has also begun to step up prevention and control to completely solve the problem of motor vehicle exhaust pollution. Creating a good air environment is also a sign of building a modern and civilized city, and it is the top priority of environmental protection work. It is urgent to solve the problem of motor vehicle exhaust pollution. Therefore, the state vigorously promotes the development of pure electric vehicles to reduce pollutant emissions and protect the atmospheric environment.

Pure electric vehicles use power battery packs and motors to drive power. It does not generate exhaust gas when it works, and does not emit exhaust pollution, which is very beneficial to environmental protection and air cleanliness. It can be said that it is almost "zero pollution". Electric vehicles are cheap to use, only about one-fifth that of gasoline vehicles. Moreover, the energy conversion efficiency is high, and at the same time, the energy during braking and downhill can be recovered, and the utilization efficiency of energy is improved.

However, due to factors such as heavy body weight and low battery energy density, pure electric vehicles have shortcomings such as "range anxiety", and the short mileage of electric vehicles has become a pain point for more and more users. At present, the main methods to solve the problem of "range anxiety" of electric vehicles are: reducing the weight of the body and lightweighting the body structure; promoting the progress of battery technology and improving the energy density of the battery; reducing the weight of the battery box structure and reducing the weight of the battery box structure.

The Chinese utility model patent application with the publication number CN206907798U discloses a carbon fiber battery case and a vehicle having the same. The battery case is composed of an aluminum honeycomb sandwich composite material. Localized lamination reinforcement for force conditions; aluminum honeycombs are porous and cannot be formed with liquid resins. The carbon fiber battery case produced by this technology has a large amount of material, a low degree of integration, and a heavy weight. It cannot use the HP-RTM process, a carbon fiber mass production process, and has a low production capacity, which cannot meet the requirements of mass production of automobiles.

At present, the battery box of electric vehicles generally adopts metal structure, and the weight of the structure is relatively large, which further reduces the cruising range of electric vehicles; the number of parts is large, the assembly is more complicated, the tooling and processes are required, and the assembly cost is high; the metal structure The battery box is located in the lower part of the vehicle body, which requires high corrosion protection and requires special spraying, and faces the problem of "secondary pollution" of the environment during spraying.

At the same time, there are very few carbon fiber composite battery boxes on the market. The structure is designed for the traditional process, which is not suitable for mass production, and does not take advantage of the integration of carbon fiber. The number of parts is large, and the weight reduction effect is not complete. In the production process, due to the large number of parts, the number of molds is large, and the cost increases; the assembly process increases, which increases the labor cost; the number of parts is connected, and the weight increases.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies in the background technology, and to provide a carbon fiber composite material battery case and an automobile containing the battery case. The battery case has a higher degree of integration, fewer parts and lighter weight. , effectively improve the compressive performance of the carbon fiber composite battery box.

In order to achieve the above purpose, a carbon fiber composite material battery box designed by the present invention includes an upper shell and a lower shell made of carbon fiber composite material, and the lower flange of the upper shell is sealed with the upper end surface of the lower shell. A thickened outer ring is arranged around the upper shell and/or the lower shell, and the thickened outer ring is filled with a second material sandwich layer.

In the above technical solution, the lower case is provided with a battery module mounting plate, and the battery module mounting plate is fixedly connected to the inner wall of the lower case.

In the above technical solution, a sealing ring is provided at the connection between the upper shell and the lower shell.

In the above technical solution, the sealing ring is made of high temperature resistant flame retardant foam.

In the above technical solution, the upper shell is a multi-layer structure formed by laying 300g/m2 carbon fiber unidirectional cloth, and the laying directions of the two adjacent layers of carbon fiber unidirectional cloth are not parallel; the outer surface of the upper shell is Provided with staggered ribs.

As a preferred embodiment, the upper shell is made of 300g/㎡ carbon fiber unidirectional cloth and is laid in three layers, the first layer is laid in the direction of 0°, the second layer is laid in the direction of 90°, and the third layer is laid in the direction of 90°. The fiber direction of the ply is laid up in the 0° direction.

In the above technical solution, the lower shell includes a bottom plate, a thickened outer ring is arranged around the bottom plate, and the thickened outer ring is filled with a second material sandwich layer, and the second material sandwich layer is a foam sandwich. .

In the above technical solution, the bottom plate is a multi-layer structure made of 300g/㎡ carbon fiber unidirectional cloth, and the laying directions of the two adjacent layers of carbon fiber unidirectional cloth are not parallel; the number of layers of the bottom plate is not parallel. More layers than the upper shell.

As a preferred embodiment, the bottom plate is made of 300g/㎡ carbon fiber unidirectional cloth and laid in five layers, the first layer is laid in the direction of 0°, the second layer is laid in the direction of 90°, and the third layer is laid in the direction of 90°. The fiber direction is layered in the 0° direction, the fourth layer is layered in the 90° direction, and the fifth layer is layered in the 0° direction.

In the above technical solution, the thickened outer ring includes a top layer, an outer layer, a bottom layer and an inner layer; the top layer, the outer layer, the bottom layer and the inner layer are a multi-layer structure laid with 300g/㎡ carbon fiber unidirectional cloth , the laying directions of the two adjacent layers of carbon fiber unidirectional cloth are not parallel; the number of layers of the top layer and the outer layer is more than the number of layers of the bottom layer and/or the inner layer.

As a preferred embodiment, the top layer and the outer layer are made of 300g/㎡ carbon fiber unidirectional cloth to be laid in twelve layers, the first layer of fiber direction is laid in the direction of 0°, and the second layer of fiber direction is laid up in the direction of 45° , the fiber direction of the third layer is layered according to the 90° direction, the fiber direction of the fourth layer is layered according to the direction of -45°, the fiber direction of the fifth layer is layered according to the direction of 90°, and the fiber direction of the sixth layer is layered according to the direction of 0°. The fiber direction of the seventh layer is layered in the direction of 0°, the fiber direction of the eighth layer is layered in the direction of 90°, the fiber direction of the ninth layer is layered in the direction of -45°, and the fiber direction of the tenth layer is layered in the direction of 90°. The fiber direction of the eleventh layer is layered in the direction of 45°, and the fiber direction of the twelfth layer is layered in the direction of 0°.

The bottom layer and inner layer are made of 300g/㎡ carbon fiber unidirectional cloth and laid in five layers, the first layer of fiber direction is laid according to 0° direction, the second layer of fiber direction is laid according to 90° direction, and the third layer of fiber direction is laid according to the direction of 90°. The layers are laid in the 0° direction, the fourth layer is laid in the 90° direction, and the fifth layer is laid in the 0° direction.

In the above technical scheme, the foam core is selected from PMI foam or PET foam, and the foam density is 75kg/m ³ -120kg/m ³ ; A penetration hole is provided at the intersection of the longitudinal and transverse grooves.

In the above technical solution, a plurality of mounting slots for accommodating battery modules are arranged on the battery module mounting plate in a row, and the bottoms of the mounting slots are glued and connected to the lower case.

As a preferred embodiment, the battery module mounting board is a multi-layer structure made of 300g/m2 carbon fiber unidirectional cloth, with a total of eight layers. The second layer is laid in the direction of 90°, the third layer is laid in the direction of 90°, the fourth layer is laid in the direction of 0°, the fifth layer is laid in the direction of 0°, and the sixth layer is laid in the direction of 0°. The fiber direction is laid up in the direction of 90°, the fiber direction of the seventh layer is laid up in the direction of 90°, and the fiber direction of the eighth layer is laid up in the direction of 0°.

The present invention also provides an automobile, comprising a vehicle frame on which the above-mentioned carbon fiber composite material battery box is arranged.

Compared with the prior art, the present invention has the following advantages:

First, the carbon fiber composite material battery box of the present invention is light in weight, more than 60% lighter than an all-steel structure, and more than 30% lighter than an all-aluminum alloy structure. After the weight reduction, the weight of the battery module can be increased. The group weight is increased by about 3.5% to 7%, so the car travel can be increased by 3.5% to 7%. The composite material structure has good anti-corrosion performance, and its service life is much higher than that of the metal structure in the humid environment of the lower part of the car. At the same time, it saves the surface protection treatment of the metal structure and reduces the environmental pollution during surface treatment.

Second, the carbon fiber composite material used in the present invention has higher fatigue life, longer service life of the carbon fiber composite material battery box, higher modal mode of the carbon fiber composite material battery box, strong anti-vibration ability, and solves the problem of vibration damage to the metal structure. . Compared with the current carbon fiber composite battery box on the market, it has a higher degree of integration, fewer parts, and lighter weight. It makes full use of the high-efficiency structure of the foam sandwich to effectively improve the compressive performance of the carbon fiber composite battery box. . The carbon fiber composite battery box is designed according to the batch production process, and the production process is mature, which is more suitable for mass production.

Third, the carbon fiber composite material battery box of the present invention has been optimally designed, and the structural form and the carbon fiber composite material parts are fully optimized. The structure makes full use of the advantages of high stiffness of the sandwich structure, and utilizes the anisotropic properties of the composite material. Layout structure. The carbon fiber composite battery box fully considers the direction and magnitude of the structural force, adopts 0° and 90° as the main layer, and ±45° as the auxiliary layer, and uses the size of the load in all directions to reasonably adjust 0° and 0° and The 90° ply ratio reduces material waste and further reduces product manufacturing costs.

Fourth, the carbon fiber unidirectional cloth used in the present invention has lower cost than woven fabrics, and the material cost of the small gram-weight carbon fiber cloth is high, the processability is good, and the process cost is low; The cost is high. The present invention adopts 300g/m2 carbon fiber unidirectional cloth, and comprehensively weighs the material cost and the process cost, so that the product cost is the lowest.

Description of drawings

1 is a schematic diagram of the disassembled structure of the carbon fiber composite material battery box of the present invention;

2 is a schematic cross-sectional structural diagram of a carbon fiber composite material battery box of the present invention;

Fig. 3 is the carbon fiber layup schematic diagram of the lower shell of the present invention;

Fig. 4 is the structural schematic diagram of the foam sandwich core of the present invention;

Among them: 1-upper shell, 2-battery module mounting plate, 3-lower shell, 3.1-bottom plate, 3.2-thickened outer ring, 3.21-top layer, 3.22-outer layer, 3.23-bottom layer, 3.24-inner layer, 4 -Sealing ring, 5-rib, 6-foam core, 6.1-groove, 6.2-through hole.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in FIG. 1, a carbon fiber composite material battery box includes an upper shell 1 and a lower shell 3 made of carbon fiber composite materials, and the lower flange of the upper shell 1 is sealed with the upper end surface of the lower shell 3. The lower shell 3 is provided with a battery module mounting plate 2 , and the battery module mounting plate 2 is fixedly connected to the inner wall of the lower shell 3 . A thickened outer ring is arranged around the upper shell 1 and/or the lower shell 3, and the thickened outer ring is filled with a second material sandwich layer. In this embodiment, a thickened outer ring is arranged around the lower shell 3 For example.

The upper shell 1, the battery module mounting plate 2 and the lower shell 3 of the present invention are made of carbon fiber composite materials, and are formed by HP-RTM process to ensure the batch production of the battery box; the carbon fiber composite material has the advantage of integrated design , which can greatly reduce the number of parts, save the investment of metal structure battery box mold, tooling, etc., and effectively reduce the investment cost. The carbon fiber composite material has excellent anti-corrosion ability, strong acid, alkali and moisture resistance. The carbon fiber composite material battery box is used, and no painting is required at all to avoid the emission of pollutants during painting. Carbon fiber composite materials have excellent fatigue resistance. The battery box using carbon fiber composite materials has a longer fatigue life and a longer product replacement and maintenance cycle, which can effectively reduce the full life cycle cost.

The upper shell 1 is a multi-layer structure made of 300g/m2 carbon fiber unidirectional cloth, and the laying directions of the two adjacent layers of carbon fiber unidirectional cloth are not parallel; the outer surface of the upper shell 1 is provided with staggered Arranged ribs 5. The upper shell 1 is less stressed on the structure of the carbon fiber composite battery box, and mainly plays the role of sealing and dimensioning, maintaining a certain internal space, and providing installation space for the battery modules inside the carbon fiber composite battery box. The upper shell 1. 300g/㎡ unidirectional cloth is used to meet the deformation requirements of the process molding, and the resin is made of flame-retardant epoxy resin, which is formed by HP-RTM process. The resin constitutes the matrix of the carbon fiber composite material, and the unidirectional fabric is the reinforcing material constituting the carbon fiber composite material. The fiber volume content is between 45% and 50%, the thickness is 1mm, and the number of layers is 3 (0/90/0) , the fiber direction of the first layer is layered according to the direction of 0°, the direction of the fiber of the second layer is layered according to the direction of 90°, and the direction of the fiber of the third layer is layered according to the direction of 0°. The surface of the upper shell 1 is rationally designed with ribs 5 to improve the local rigidity of the upper shell 1 of the battery box, reduce the deformation of the upper shell 1 when the battery box vibrates, and prevent the structure of the upper shell 1 from interfering with the battery box module.

As shown in FIG. 2 , a sealing ring 4 is provided at the connection between the upper case 1 and the lower case 3 . The sealing ring 4 is made of high temperature resistant flame retardant foam, which acts between the inside and the outside of the battery box. The sealing function meets the sealing requirements of the battery box. At the same time, the battery box is at the bottom of the car, and there are working conditions such as wading. In order to protect the safety of the internal battery mold, it meets the sealing requirements of IP67. Through the clamping force of the bolts between the upper shell 1 and the lower shell 3, the compression amount of the sealing strip is between 30-50%, which meets the sealing requirements.

As shown in FIG. 3 , the lower shell 3 includes a bottom plate 3.1 and a thickened outer ring 3.2 arranged around the bottom plate 3.1, and the thickened outer ring 3.2 is filled with a foam core 6 . The carbon fiber composite material has the advantages of variable thickness design, and local thickening treatment is adopted in the parts where the surrounding ring is subjected to greater stress to meet the stress requirements of the battery box. The bottom plate 3.1 is a multi-layer structure made of 300g/㎡ carbon fiber unidirectional cloth, and the laying directions of the two adjacent layers of carbon fiber unidirectional cloth are not parallel; the number of layers of the bottom plate 3.1 is more than that of the upper Number of ply layers for Shell 1. In this implementation, the bottom plate 3.1 is made of 300g/m2 carbon fiber unidirectional cloth and is spread into five layers, and the resin is flame-retardant epoxy resin, which is formed by HP-RTM process. The resin is the matrix that constitutes the carbon fiber composite material, and the unidirectional cloth is the reinforcing material that constitutes the carbon fiber composite material. /0/90/0), the fiber direction of the first layer is layered in the direction of 0°, the fiber direction of the second layer is layered in the direction of 90°, the fiber direction of the third layer is layered in the direction of 0°, and the fiber direction of the fourth layer is layered in the direction of 0°. The layers are laid in the direction of 90°, and the fiber direction of the fifth layer is laid in the direction of 0°.

In the above technical solution, the thickened outer ring 3.2 includes a top layer 3.21, an outer layer 3.22, a bottom layer 3.23 and an inner layer 3.24; the top layer 3.21, the outer layer 3.22, the bottom layer 3.23 and the inner layer 3.24 are made of 300g/m2 carbon fiber monolayer. In the multi-layer structure formed by laying the cloth, the laying directions of the adjacent two layers of carbon fiber unidirectional cloth are not parallel; layers.

In this embodiment, the thickness of the top layer 3.21 and the outer layer 3.22 is 4mm, and 300g/㎡ of carbon fiber unidirectional cloth is used to lay twelve layers (0/45/90/-45/90/0/0/90/ -45/90/45/0), the first layer of fibers is laid in the direction of 0°, the second layer of fibers is laid in the direction of 45°, the third layer of fibers is laid in the direction of 90°, and the fourth layer of fibers The direction of the layer is -45°, the fiber direction of the fifth layer is layered at 90°, the fiber direction of the sixth layer is layered at 0°, the fiber direction of the seventh layer is layered at 0°, and the fiber direction of the eighth layer Lay up in 90° direction, ninth layer in fiber direction in -45° direction, tenth layer in fiber direction in 90° direction, eleventh layer in fiber direction in 45° direction, twelfth layer in fiber direction The layers are laid in the direction of 0°, of which 5 layers are consistent with the middle part as the whole layer, and the remaining 7 layers are locally thickened layers.

In this embodiment, the bottom layer 323 and the inner layer 324 are laid with 300g/m2 carbon fiber unidirectional cloth into five layers (0/90/0/90/0), and the fiber direction of the first layer is laid in the direction of 0°, The fiber direction of the second layer is 90°, the third layer is 0°, the fourth layer is 90°, and the fifth layer is 0°.

As shown in Figure 4, the foam core 6 selects PMI foam or PET foam, and the foam density is 75kg/m ³ -120kg/m ³ ; Grooves 6.1 are arranged at lateral intervals, and the width of the grooves 6.1 is 2mm-3mm and the depth is 1mm. A penetration hole 6.2 is provided at the intersection of the grooves 6.1 in the longitudinal and transverse directions, which facilitates the flow of the resin on the upper and lower surfaces of the foam and improves the molding quality of the product. The foam sandwich structure has high rigidity and strength, and the foam sandwich is used in the perimeter, which helps to improve the anti-extrusion and impact resistance characteristics of the battery box; Reliability of body mounting points.

In the above technical solution, the battery module mounting plate 2 is provided with a plurality of mounting grooves 2.1 for accommodating battery modules in a row, and the bottom of the mounting grooves 2.1 is adhesively connected to the lower shell 3 . The battery module mounting plate 2 is mainly connected to the battery module and bears the vertical load of module vibration, overload during collision and other load requirements. It is the main force-bearing component of the battery box. Using the anisotropic characteristics of carbon fiber composite materials, it is used in the product. Axial fibers are arranged in the direction of force. Since the battery module mounting plate 2 mainly bears lateral and longitudinal loads, the layers are mainly 0° and 90°, and there is no ±45° direction. The material is 300g/㎡ uniaxial Cloth, the resin is flame retardant epoxy resin, and it is formed by HP-RTM process. The resin is the matrix constituting the carbon fiber composite material, the unidirectional cloth is the reinforcing material constituting the carbon fiber composite material, the fiber volume content is 50%, and the thickness is 2.64 mm. In this embodiment, the number of layers of the battery module mounting board 2 is 8 layers (0/90/90/0/0/90/90/0), the first layer of fiber The second layer is laid in the direction of 90°, the third layer is laid in the direction of 90°, the fourth layer is laid in the direction of 0°, the fifth layer is laid in the direction of 0°, and the sixth layer is laid in the direction of 0°. The fiber direction is laid up in the direction of 90°, the fiber direction of the seventh layer is laid up in the direction of 90°, and the fiber direction of the eighth layer is laid up in the direction of 0°.

The battery module mounting plate 2 and the lower shell 3 are glued together by adhesive in the middle part to form the lower tray of the battery box, which bears the force of the entire battery box; the lower tray is a cavity structure, in order to ensure the cavity Overall stiffness and local stiffness, the mounting groove 2.1 designed for the battery module mounting plate 2 and the lower shell 3 are glued together by adhesive to ensure that the lower shell 3 and the battery module mounting plate 2 support each other.

The production process and loading process of the carbon fiber composite material battery box of the present invention are as follows: according to the layup structure, three layers of 300g/㎡ unidirectional cloth are unloaded in the order of 0/90/0, and the mold of the upper shell 1 The carbon fiber layer is laid on the top, and after being formed by the HP-RTM process, cutting and drilling are performed to form the upper shell 1; 0/90/90/0 sequence of blanking, laying a carbon fiber layer on the mold of the battery module mounting plate 2, after molding by HP-RTM, cutting and drilling to form the battery module mounting plate 2; According to the lay-up development structure of the lower shell 3, the pre-formed mold of the lower shell 3 is first laid with half of the overall lay-up, and then the partial lay-up is laid on the perimeter reinforcement area, and the foam core 6 is placed again. A lower shell preform is formed by laying down one half of the overall layup. The lower shell preform is put into the molding die of the lower shell, and after the HP-RTM is formed, cutting and drilling are performed to form the lower shell 3 . At this point, all carbon fiber composite parts have been formed.

Put the lower shell 3 on the assembly tool, apply adhesive according to the designed area, and glue the battery module mounting plate 2 and the lower shell 3 together to form the lower tray of the carbon fiber composite battery box; The battery pack is installed on the battery module mounting plate 2, and then the sealing ring 4 is placed on the sealing surface of the lower casing, the upper casing 1 is covered, and the upper casing 1 and the lower tray of the battery box are connected by bolts, and the sealing ring 4 is fixed. Compress to keep it tight. The assembled carbon fiber composite material battery box is installed on the electric vehicle through the vehicle body installation point on the lower shell 3, and the entire carbon fiber composite material battery box is loaded into the vehicle.

Compared with the metal structure battery box, the present invention has higher weight reduction efficiency. Taking a battery box as an example, the steel structure battery box weighs about 90kg, the aluminum alloy battery box is about 54kg, and the carbon fiber composite material battery box is only 32kg , contributing to the increase in the cruising range of electric vehicles. The carbon fiber composite battery box is mounted on the lower part of the car body, and the interior is a power battery module, which needs to meet the requirements of various environments and working conditions: mainly including external fire, seawater immersion, damp heat and other environmental requirements and vibration, mechanical shock, drop, Force requirements such as overturning and extrusion. The upper shell 1, the lower shell 3, and the module mounting plate are the main parts of the battery box. The carbon fiber composite material is used to effectively resist damp heat and corrosion; using the anisotropic characteristics of the carbon fiber composite material, the axial direction is more arranged in the direction of force. Fiber, the upper shell 1, the lower shell 3, and the module installation plate are based on their stress characteristics, and the 0° and 90° layers are mainly used, and the ±45° layers are supplemented to improve the bearing efficiency and withstand vibration at the same time. , drop, flip load. The 3 peripheries of the lower shell adopt a foam sandwich structure, which bears better stress and mainly bears the loads of extrusion and mechanical impact. At the same time, the advantages of the variable thickness design of carbon fiber composite materials are used, and local thickening layers are used in the perimeter area to further Reduce product weight, reduce costs, and promote the industrial application of carbon fiber composite battery boxes.

An automobile, comprising a vehicle frame on which the above-mentioned carbon fiber composite material battery box is arranged, the module mounting plate and the battery module are connected in the form of mechanical connection (such as screwing or riveting), and are connected with the lower shell 3 Adhesive is used for bonding; the lower shell 3 is connected with the frame at the periphery by mechanical connection (such as screwing or riveting), and a sealing ring is arranged between the lower shell 3 and the upper shell 1 to meet the sealing requirements of the battery box. When the invention is applied to electric vehicles, it has the advantages of less parts, high weight reduction rate, high cruising mileage, long fatigue life, good corrosion resistance, good vibration resistance, etc., and can effectively improve the energy density of the battery box. Contribute to the batch application of carbon fiber battery boxes.

The above are only specific embodiments of the present invention. It should be pointed out that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention shall be included in the protection scope of the present invention. Inside, the rest that are not described in detail are prior art.

Claims (10)

1. a kind of carbon fibre composite Battery case, it is characterised in that: including the upper casing made of carbon fibre composite (1) With lower casing (3), the lower flange of the upper casing (1) and the upper surface of lower casing (3) are tightly connected, the upper casing (1) and/or lower casing (3) surrounding, which is provided with, thickens outer ring, described to thicken in outer ring filled with the second material sandwich of layers.

2. carbon fibre composite Battery case according to claim 1, it is characterised in that: setting in the lower casing (3) Have battery modules mounting plate (2), the battery modules mounting plate (2) is fixedly connected with the inner wall of lower casing (3).

3. carbon fibre composite Battery case according to claim 1, it is characterised in that: the upper casing (1) and lower casing (3) junction is provided with sealing ring (4)；The sealing ring (4) is made of fire-retardant foam resistant to high temperature.

4. carbon fibre composite Battery case according to claim 1, it is characterised in that: the upper casing (1) is to use The laying direction of multilayered structure made of the carbon fiber unidirectional cloth of 300g/ ㎡ is laid with, the carbon fiber unidirectional cloth of adjacent two layers is uneven Row；The outer surface of the upper casing (1) is provided with the convex ribs (5) of interlaced arrangement.

5. carbon fibre composite Battery case according to claim 1, it is characterised in that: the lower casing (3) includes bottom Plate (3.1), the surrounding of the bottom plate (3.1), which is provided with, to be thickened outer ring (3.2), described to thicken in outer ring (3.2) filled with second Material sandwich of layers, the second material sandwich of layers are foam core (6).

6. carbon fibre composite Battery case according to claim 5, it is characterised in that: the bottom plate (3.1) is to adopt Multilayered structure made of being laid with the carbon fiber unidirectional cloth of 300g/ ㎡, the laying direction of the carbon fiber unidirectional cloth of adjacent two layers is not In parallel；The laying number of plies of the bottom plate (3.1) is more than the laying number of plies of upper casing (1).

7. carbon fibre composite Battery case according to claim 5, it is characterised in that: described to thicken outer ring (3.2) Including top layer (3.21), outer layer (3.22), bottom (3.23) and internal layer (3.24)；The top layer (3.21), outer layer (3.22), Bottom (3.23) and internal layer (3.24) are the multilayered structure made of the carbon fiber unidirectional cloth of 300g/ ㎡ is laid with；The top Layer (3.21), outer layer (3.22) the laying number of plies more than bottom (3.23) and/or internal layer (3.24) the number of plies.

8. carbon fibre composite Battery case according to claim 5, it is characterised in that: foam core (6) choosing With PMI foam or PET foam, foam density 75kg/m³-120kg/m³；The surface of the foam core (6) is along longitudinal direction and horizontal To groove (6.1) are arranged at intervals with, the intersection in length and breadth of the groove (6.1) is provided with through hole (6.2).

9. carbon fibre composite Battery case according to claim 1, it is characterised in that: the battery modules mounting plate (2) several mounting grooves (2.1) for set battery mould group, the bottom of the mounting groove (2.1) are in a row provided in column It pastes and connects with lower casing (3).

10. a kind of automobile, including vehicle frame, it is characterised in that: be arranged on the vehicle frame described in any item just like claim 1-9 Carbon fibre composite Battery case.