GB2620000A - Battery box, skateboard chassis and electric vehicle - Google Patents

Battery box, skateboard chassis and electric vehicle Download PDF

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Publication number
GB2620000A
GB2620000A GB2304375.5A GB202304375A GB2620000A GB 2620000 A GB2620000 A GB 2620000A GB 202304375 A GB202304375 A GB 202304375A GB 2620000 A GB2620000 A GB 2620000A
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United Kingdom
Prior art keywords
layer
box
battery box
octahedral
structure layer
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Pending
Application number
GB2304375.5A
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GB202304375D0 (en
Inventor
Su Liang
gong Gang
Huang Shengyou
Hong Shaoyang
Luo Bin
Cai Hongyi
Zhang Jinmin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xiamen King Long United Automotive Industry Co Ltd
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Xiamen King Long United Automotive Industry Co Ltd
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Publication of GB202304375D0 publication Critical patent/GB202304375D0/en
Publication of GB2620000A publication Critical patent/GB2620000A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
    • 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
    • H01M50/202—Casings or frames around the primary casing of a single cell or a single battery
    • 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
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/222—Inorganic material
    • H01M50/224—Metals
    • 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
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/229—Composite material consisting of a mixture of organic and inorganic materials
    • 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
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/231—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks having a layered structure
    • 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
    • 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
    • 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
    • H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Abstract

A battery box, suitable for a skateboard chassis of an electric vehicle (EV), comprises a box (101) and cover (103), the box comprising four side walls vertically connected with a bottom plate. The bottom plate and each side wall have the same multi-layer composite structure comprising: a first, protective aluminium plate 201, relatively located towards an inner side of the box; a second, protective aluminium plate 206, relatively located towards an outer side of the box; and an energy-absorbing buffer sandwich 200 between the first and second protective plates. The buffer sandwich comprises: an octahedral porous core structure inner layer 202, formed by an array of octahedral elements (202A); a spiral vortex structure outer layer 204, formed by an array of spiral vortex elements (204A); and an aluminium partition board 203 arranged between the two structure layers. An outer layer of the second protective plate is compounded with a carbon fibre layer 206. The box cover includes an aluminium plate 802 with an outer carbon fibre resin material layer 801. Two outer sides of the box are fixed with a side anti-collision device (102) comprising a rectangular hollow tube body filled with a honeycomb core body, formed by a close array of honeycomb cells (102A).

Description

BATTERY BOX, SKATEBOARD CHASSIS AND ELECTRIC VEHICLE
TECHNICAL FIELD
[0001] The present disclosure relates to the field of battery components for electric vehicles, and in particular, to a battery box for a cell to chassis (CTC) skateboard chassis.
BACKGROUND
[0002] The skateboard chassis is a highly integrated chassis formed by integrating the motor, battery, electric control, steering, braking, and suspension systems into an independent chassis. In the CTC battery integration solution, the battery cell is directly integrated into the floor frame and the upper and lower panels on the floor are used as the battery shell, that is, battery body integration is realized. The CTC battery integration solution perfectly fits for the high integration characteristics of the skateboard chassis. However, the CTC battery integration solution has a distinctive feature that the battery box is used as the accommodating and protection component of the battery power system, and also needs to undertake the functions of the chassis frame, including participating in the load, stiffness and strength, and anti-collision of the vehicle. However, the battery box in the prior art often does not take into account the stiffness, strength and collision protection ability.
SUMMARY
[0003] In view of the above problems, the present disclosure provides a battery box with an optimized structure. Based on the battery box, a skateboard chassis with the battery box and an electric vehicle are further provided.
[0004] The present disclosure is implemented by the following technical solutions: 100051 The present disclosure provides a battery box, including a box with an opening at one end and a box cover covering the opening of the box. The box includes a bottom plate and four side walls vertically connected with the bottom plate. The bottom plate and each of the side walls are of a same multi-layer composite structure. The multi-layer composite structure includes a first protective plate relatively located on an inner side of the box, a second protective plate relatively located on an outer side of the box and an energy-absorbing buffer sandwich between the first protective plate and the second protective plate.
[0006] Preferably, the energy-absorbing buffer sandwich includes an octahedral porous core structure layer. The octahedral porous core structure layer is formed by an array of octahedral elements. Each of the octahedral elements is a structure in which each corner of a hollow octahedron is provided with a flat section to make each corner cut into a square hole.
[0007] Preferably, the pairwise octahedral elements arranged in an array are butted with each other through the flat section to make hollow inner cavities of all octahedral elements communicated.
[0008] Preferably, the energy-absorbing buffer sandwich further includes a partition board and a spiral vortex structure layer. The octahedral porous core structure layer is relatively in an inner layer. The spiral vortex structure layer is relatively in an outer layer. The partition board is arranged between the octahedral porous core structure layer and the spiral vortex structure layer to isolate the octahedral porous core structure layer and the spiral vortex structure layer.
100091 Preferably, the spiral vortex structure layer is formed by an array of spiral vortex elements. The spiral vortex element is composed of N elastic semi-circular monomers with a same radius. Each of the N semi-circular monomers has one end intersecting at a center. The adjacent semi-circular monomers are distributed at a (360/N)° angle with the center as a rotation center, where N is greater than or equal to 3 and N is an integer.
[0010] Preferably, the octahedral porous core structure layer is injected with temperature-controlled liquid.
[0011] Preferably, all of the first protective plate, the second protective plate and the partition board are aluminum plates.
[0012] Preferably, an outer layer of the second protective plate is compounded with a carbon fiber layer.
[0013] Preferably, the box cover includes an inner layer of aluminum plate and an outer carbon fiber resin material layer. The outer carbon fiber resin material layer of the box cover and the carbon fiber layer at an outermost layer of the box form complete carbon fiber wrapping for the battery box.
100141 Preferably, left and right outer sides of the box are further fixed with a side anti-collision device.
[0015] Preferably, the side anti-collision device includes a rectangular hollow tube body and a honeycomb core body filled in the tube body.
[0016] Preferably, the honeycomb core body is formed by a close array of a number of honeycomb cells. Each of the honeycomb cells includes a hexagonal outer frame and a circular inner frame arranged in the outer frame. Six connecting plates extend inward from six inner corners of the outer frame and are externally tangent to the inner frame to connect the outer frame and the inner frame.
[0017] Based on the above battery box, the present disclosure further provides a skateboard chassis, including the above battery box.
100181 Based on the above skateboard chassis, the present disclosure further provides an electric vehicle, including the above skateboard chassis.
100191 The present disclosure has the following beneficial effects: the battery box provided by the present disclosure has an anti-collision function while ensuring stiffness and strength, and has excellent mechanical properties, vibration damping characteristic, heat resistance, corrosion resistance, and excellent temperature control capability and buffering and energy absorption effects.
BRIEF DESCRIPTION OF THE DRAWINGS
100201 FIG. 1 is a structural decomposition diagram of a battery box in Embodiment 1; [0021] FIG. 2 is a schematic diagram of a multi-layer composite structure of a side wall in Embodiment 1; [0022] FIG. 3 is a schematic diagram of an octahedral porous core structure layer in Embodiment 1; [0023] FIG 4 is a schematic diagram of an octahedral element in Embodiment 1; [0024] FIG 5 is a schematic diagram of a spiral vortex structure layer in Embodiment 1; [0025] FIG 6 is a schematic diagram of a spiral vortex element in Embodiment 1; 100261 FIG 7 is a schematic diagram of a honeycomb core body in Embodiment 1; [0027] FIG 8 is a schematic diagram of a honeycomb cell in Embodiment 1; and [0028] FIG 9 is a schematic diagram of a box cover in Embodiment I.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0029] To further illustrate the embodiments, the present disclosure provides accompanying drawings. The accompanying drawings, as a part of the present disclosure, are mainly used to illustrate the embodiments, and can explain the operating principles of the embodiments with reference to the related descriptions in this specification. With reference to such content, those of ordinary skill in the art can understand other possible implementations and the advantages of the present disclosure. Components in the drawings are not drawn to scale, and similar reference numerals are usually used to represent similar components.
[0030] The present disclosure will be further described below with reference to the accompanying drawing and specific implementations.
100311 Embodiment 1: [0032] With reference to FIG. 1, as a preferred embodiment of the present disclosure, a battery box is provided, which is particularly suitable for a skateboard chassis. The battery box includes a box 101 with an opening at one end and a box cover 103 covering the opening of the box. The box 101 includes a bottom plate and four side walls vertically connected with the bottom plate.
In the present embodiment, the bottom plate and the side walls are connected as a whole. Both the bottom plate and the side wall are of a multi-layer composite structure. FIG. 2 shows a schematic diagram of the multi-layer composite structure of the side wall. The multi-layer composite structure of the bottom plate is the same as that of the side wall. The multi-layer composite structure includes a first protective plate 201 relatively located on an inner side of the box 101, a second protective plate 205 relatively located on an outer side of the box 101 and an energy-absorbing buffer sandwich 200 between the first protective plate 201 and the second protective plate 205. Through such arrangement, on the basis that the first protective plate 201 and the second protective plate 205 can ensure the hardness and stiffness of the battery box, the energy-absorbing buffer sandwich 200 can also provide enough collision buffer to ensure that the battery box will not be damaged due to excessive impact energy in the event of a collision.
100331 The energy-absorbing buffer sandwich 200 specifically includes an octahedral porous core structure layer 202, a partition board 203 and a spiral vortex structure layer 204. The octahedral porous core structure layer 202 is relatively in an inner layer. The spiral vortex structure layer 204 is relatively in an outer layer. The partition board 203 is arranged between the octahedral porous core structure layer 202 and the spiral vortex structure layer 204 to isolate the octahedral porous core structure layer and the spiral vortex structure layer. A specific structure of the octahedral porous core structure layer 202 is shown in FIG. 3 and FIG. 4. The octahedral porous core structure layer 202 is formed by an array of octahedral elements 202A. Each of the octahedral elements 202A is a structure in which each corner of a hollow octahedron is provided with a flat section 202A-1 to make each corner cut into a square hole 202A-2. The pairwise octahedral elements 202A are butted with each other through the flat section 202A-1 to make hollow inner cavities of all octahedral elements 202A communicated, so as to form the structural layer of the porous core (that is, including a porous cavity structure of each octahedral element 202A and a gap between the pairwise octahedral elements 202A). The pairwise octahedral elements 202A are connected in the form of surface-to-surface contact, which has higher contact stiffness and strength than the traditional porous structure which adopts the wire-to-wire contact connection mode, thus enhancing the mechanical properties of the box. The octahedral porous core structure layer 202 has excellent anti-vibration performance and can provide buffer for the battery box. Moreover, due to the octahedral porous core structure, the internal volume of the octahedral porous core structure layer is large but its contact area with the first protective plate 201 and the partition board 203 is small. In actual use of the battery box, temperature-controlled liquid can be injected into the octahedral porous core structure layer 202 to keep the optimal operating temperature range of the battery inside the battery box.
100341 A specific structure of the spiral vortex structure layer 204 is shown in FIG. 5 and FIG. 6.
The spiral vortex structure layer 204 is formed by an array of spiral vortex elements 204A. The spiral vortex element 204A is composed of six semi-circular monomers with a same radius. Each of the six semi-circular monomers has one end intersecting at a center. The adjacent semicircular monomers are distributed at a 600 angle with the center as a rotation center. The semicircular monomer is made of an elastic metal. In the case of bumping or impact, it can form effective collapse after three stages, namely elastic deformation stage, yield stage and densification stage, and has an excellent energy absorption effect. It provides enough buffer for the battery box in the case of strong impact, and effectively reduces the impact force on the battery during the collision of the battery box. The impact puncture protection ability of the battery box is improved, and the spiral vortex structure layer 204 can be bent to a certain extent, which is convenient for the formation of the battery box structure.
[0035] In other embodiments, there can also be other numbers of semi-circular monomers in the spiral vortex element 204A, such as 3, 8, and 12, as long as the adjacent semi-circular monomers in the N semi-circular monomers are evenly arranged at a (360/N)° angle around the rotation center. N is greater than or equal to 3 and N is an integer. It is preferred that N is divisible by 360. In the present embodiment, the solution of selecting six semi-circular monomers can maintain low manufacturing cost and ensure its performance.
[0036] In the present embodiment, the octahedral porous core structure layer 202 and the spiral vortex structure layer 204 can be made of aluminum alloy or magnesium aluminum alloy material by wire cutting or metal 3D printing process.
[0037] In the present embodiment, all of the first protective plate 201, the second protective plate 205 and the partition board 203 are aluminum plates, so as to enhance the thermal conductivity of the box. In addition, in the present embodiment, preferably, an outer layer of the second protective plate 205 is compounded with a carbon fiber layer 206, so as to enhance the mechanical properties of the box.
[0038] With continuous reference to FIG. 1 and FIG. 2, a support beam 207 is welded and fixed in the box 101. The support beam 207 is a structure of staggered two cross beams on a longitudinal beam spliced by aluminum profiles. Left and right outer sides of the box 101 (that is, both sides of the box 101 in the width direction) are further fixed with a side anti-collision device 102. The side anti-collision device 102 includes a rectangular hollow tube body and a honeycomb core body filled in the tube body, so as to enhance the energy absorption effect of the side anti-collision device 102. As shown in FIG. 7 and FIG. 8, the honeycomb core body in the present embodiment is formed by a close array of a number of honeycomb cells 102A. Each of the honeycomb cells 102A includes a hexagonal outer frame 102A-1 and a circular inner frame 102A-2 arranged in the outer frame. Six connecting plates 102A-3 extend inward from six inner corners of the outer frame 102A-1 and are externally tangent to the inner frame 102A-2 to connect the outer frame 102A-1 and the inner frame 102A-2. The honeycomb core body has excellent energy absorption characteristics and can be well filled into the rectangular hollow tube body.
[0039] As shown in FIG. 9, the box cover 103 is of a carbon fiber reinforced aluminum alloy laminate structure. The box cover includes an inner layer of aluminum plate 802 and an outer carbon fiber resin material layer 801, which enhances the mechanical properties of the box cover 103 while realizing lightweight performance. The combination of the two reduces the quality of the box cover 103, and ensures the strength and stiffness of the box cover 103. The outer carbon fiber resin material layer 801 of the box cover 103 and the carbon fiber layer 206 at an outermost layer of the box form complete carbon fiber wrapping for the battery box, which ensures the overall strength of the battery box. A seal is embedded at the joint of the profiled aluminum plate 802 and the box 101 to form a seal.
[0040] The battery box provided by the present embodiment has the following advantages.
[0041] 1. Excellent mechanical properties. The carbon fiber is a high-strength and high-modulus fiber material with a carbon content of at least 95%, which has higher tensile strength than aluminum. The aluminum is a lightweight and high-strength material, and contrary to the carbon fiber, the aluminum has excellent compression resistance. The combination of the two has complementary advantages. In the present embodiment, the outermost layer of the box 101 and the box cover 103 adopts a carbon fiber layer and an aluminum plate. The carbon fiber is in the outer layer and the aluminum plate is in the inner layer, which makes the battery box stronger and has an excellent impact and deformation resistance effect.
[0042] 2. Excellent buffer and energy absorption effects. First, the energy-absorbing buffer sandwich 200 of the box 101 has the spiral vortex structure layer 204 of a metal material. In the case of bumping or impact, it goes through three stages, namely elastic deformation stage, yield stage and densification stage. With the increase of strain, its yield stress also shows an upward trend, indicating that the box structure can absorb a large amount of energy under relatively low stress during compression. Second, when the spiral vortex structure layer 204 encounters a certain strong impact, it can form an effective collapse and provide enough buffer to ensure the normal operation of the battery.
100431 3. Excellent vibration damping characteristic. Vibration is transmitted in the form of waves. When the vibration waves pass through the octahedral porous core structure layer 202, the sandwich has a lower relaxation modulus because the density of the sandwich is significantly lower than that of the solid wall of the traditional battery box, and the amplitude and energy transmitted by vibration are absorbed layer by layer to achieve vibration damping, so as to ensure that the battery is not damaged by vibration.
100441 4. Excellent temperature control ability. The octahedral porous core structure layer 202 is embedded in a closed cavity, and liquid for temperature control can be injected inside. The octahedral porous core structure layer 202 has a small contact area with the first protective plate 201 and the partition board 203, which can make the surface fully contact with the temperature-controlled liquid and transmit it to the battery, making the temperature control more efficient. [0045] 5. Excellent heat and corrosion resistance. First, the carbon fiber can withstand high temperatures of at least 3,000 degrees Celsius, and has outstanding heat resistance. Second, the carbon fiber has excellent chemical stability and excellent corrosion resistance to general organic solvents, acids and alkali, is insoluble and does not expand, and has outstanding corrosion resistance, and there is no rust problem. The outermost layer of the box is made of carbon fiber, which has excellent heat and corrosion resistance.
100461 6. Replaceable outer protective energy-absorbing side and low maintenance cost. The side anti-collision device 102 for protecting and absorbing the impact on the battery box is arranged on the outer side of the battery box. The outside of the device is provided with the hollow rectangular tube, and the inside is filled with the honeycomb core body for energy absorption. The side anti-collision device 102 can be adhered to the battery box with an structural adhesive. The structural adhesive has high strength, can bear large load, is resistant to aging, fatigue, and corrosion, has stable performance, and does not damage the main body of the battery box.
[0047] Embodiment 2: [0048] The present embodiment provides a skateboard chassis, including the battery box in Embodiment 1, and having the same technical effect of the same structure.
100491 Embodiment 3: [0050] The present embodiment provides an electric vehicle, including the skateboard chassis in Embodiment 2, and having the same technical effect of the same structure.
[0051] Although the present disclosure is specifically illustrated and described in combination with preferred implementations, those skilled in the art should understand that various changes made to the present disclosure in terms of forms and details without departing from the spirit and scope of the present disclosure defined in the appended claims shall fall within the protection scope of the present disclosure.

Claims (12)

  1. WHAT IS CLAIMED IS: 1. A battery box, comprising a box with an opening at one end and a box cover covering the opening of the box, wherein the box comprises a bottom plate and four side walls vertically connected with the bottom plate, the bottom plate and each of the side walls are of a same multi-layer composite structure, and the multi-layer composite structure comprises a first protective plate relatively located on an inner side of the box, a second protective plate relatively located on an outer side of the box and an energy-absorbing buffer sandwich between the first protective plate and the second protective plate.
  2. 2. The battery box according to claim 1, wherein the energy-absorbing buffer sandwich comprises an octahedral porous core structure layer, the octahedral porous core structure layer is formed by an array of octahedral elements, and each of the octahedral elements is a structure in which each corner of a hollow octahedron is provided with a flat section to make each corner cut into a square hole.
  3. 3. The battery box according to claim 2, wherein the energy-absorbing buffer sandwich further comprises a partition board and a spiral vortex structure layer, the octahedral porous core structure layer is relatively in an inner layer, the spiral vortex structure layer is relatively in an outer layer, and the partition board is arranged between the octahedral porous core structure layer and the spiral vortex structure layer to isolate the octahedral porous core structure layer and the spiral vortex structure layer.
  4. 4. The battery box according to claim 3, wherein the spiral vortex structure layer is formed by an array of spiral vortex elements, the spiral vortex element is composed of N elastic semicircular monomers with a same radius, each of the N semi-circular monomers has one end intersecting and fixed at a center, and the adjacent semi-circular monomers are distributed at a (360/N)° angle with the center as a rotation center, wherein N is greater than or equal to 3 and N is an integer.
  5. The battery box according to claim 3, wherein the octahedral porous core structure layer is injected with temperature-controlled liquid.
  6. 6. The battery box according to claim 3, wherein all of the first protective plate, the second protective plate and the partition board are aluminum plates, and an outer layer of the second protective plate is compounded with a carbon fiber layer.
  7. 7. The battery box according to claim 6, wherein the box cover comprises an inner layer of aluminum plate and an outer carbon fiber resin material layer, and the outer carbon fiber resin material layer of the box cover and the carbon fiber layer at an outermost layer of the box form complete carbon fiber wrapping for the battery box
  8. 8. The battery box according to claim 1, wherein left and right outer sides of the box are further fixed with a side anti-collision device
  9. 9 The battery box according to claim 8, wherein the side anti-collision device comprises a rectangular hollow tube body and a honeycomb core body filled in the tube body.
  10. 10. The battery box according to claim 9, wherein the honeycomb core body is formed by a close array of a number of honeycomb cells, each of the honeycomb cells comprises a hexagonal outer frame and a circular inner frame arranged in the outer frame, and six connecting plates extend inward from six inner corners of the outer frame and are externally tangent to the inner frame to connect the outer frame and the inner frame.
  11. 11. A skateboard chassis, comprising the battery box according to any one of claims 1 to 10.
  12. 12. An electric vehicle, comprising the skateboard chassis according to claim 11.
GB2304375.5A 2022-06-24 2023-03-24 Battery box, skateboard chassis and electric vehicle Pending GB2620000A (en)

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CN202210726172.1A CN114976421B (en) 2022-06-24 2022-06-24 Battery box, slide plate type chassis and electric automobile

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GB (1) GB2620000A (en)

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CN107195812A (en) * 2016-03-15 2017-09-22 深圳市沃特玛电池有限公司 A kind of battery case and its manufacture method
GB2553537A (en) * 2016-09-07 2018-03-14 Arrival Ltd Battery box
CN108847465A (en) * 2018-06-22 2018-11-20 湖南湖大艾盛汽车技术开发有限公司 A kind of battery of electric vehicle group cabinet lightweight structure
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CN114976421B (en) 2023-07-04
CN114976421A (en) 2022-08-30
FR3137216A1 (en) 2023-12-29

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