CN110660937B - Electric automobile battery box based on thickness-variable gradient zero Poisson ratio structure - Google Patents

Electric automobile battery box based on thickness-variable gradient zero Poisson ratio structure Download PDF

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CN110660937B
CN110660937B CN201910801014.6A CN201910801014A CN110660937B CN 110660937 B CN110660937 B CN 110660937B CN 201910801014 A CN201910801014 A CN 201910801014A CN 110660937 B CN110660937 B CN 110660937B
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plate
box body
box
battery
poisson ratio
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CN110660937A (en
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周冠
闫鹏飞
赵万忠
王源隆
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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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
    • 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
    • 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

The invention discloses an electric automobile battery box based on a variable thickness gradient zero-Poisson ratio structure, belongs to the field of new energy electric automobiles, adopts a zero-Poisson ratio material for filling to design an energy absorption box, has excellent performance in the aspects of energy absorption and shock absorption, and is simple in process, relatively low in manufacturing cost and lighter in weight. The energy-absorbing box comprises an upper cover plate, an energy-absorbing box body, a box body plate a, a box body plate b and a lower bottom plate; the upper cover plate, the two box body plates a, the two box body plates b and the lower bottom plate are assembled into a box body, and the energy absorption box body is positioned in the box body; the energy-absorbing box body comprises an aluminum alloy heat-conducting plate, a carbon fiber heat-absorbing plate, a zero-Poisson ratio three-dimensional structure material and an energy-absorbing box upper cover plate, the aluminum alloy heat-conducting plate is tightly attached to the battery body, the carbon fiber heat-absorbing plate is tightly attached to the inner walls of the box body plate a and the box body plate b, and the zero-Poisson ratio three-dimensional structure material is filled between the aluminum alloy heat-conducting plate and the carbon fiber heat-absorbing plate.

Description

Electric automobile battery box based on thickness-variable gradient zero Poisson ratio structure
Technical Field
The invention belongs to the field of new energy electric automobiles, and particularly relates to an electric automobile battery box based on a variable thickness gradient zero Poisson ratio structure.
Background
"zero poisson's ratio material" refers to a material in which the strain in the direction perpendicular to the direction of action of the load does not change when the material is under tension or compression. Materials with a "zero poisson's ratio effect" are most often used in applications where they are sensitive to deformation in the unloaded direction or where the strain in the unloaded direction is not allowed to change. Because the material with the zero Poisson ratio effect is generally a honeycomb structure, the material has better performance than the common material in the aspects of energy absorption and shock absorption.
The battery of the electric automobile is a power source of the electric automobile, and the normal running of the automobile can be seriously influenced if the battery of the electric automobile is damaged. Since a normal-running automobile is likely to hit a battery portion when an accidental impact is applied thereto, it is necessary to protect the battery with a material having a certain excellent performance, and damage to the battery is minimized.
The protection scheme of current electric automobile battery mainly focuses on the selection of casing material, through choosing high strength material probably leads to the increase of battery box whole quality. And present electric automobile battery most all reduces the harm that the collision caused to inside battery module through set up certain clearance between for battery case and battery or battery and the battery, in case when the striking is comparatively serious, hardly guarantee not to reach inside battery module.
Disclosure of Invention
The invention provides an electric automobile battery box based on a variable thickness gradient zero Poisson ratio structure, which is characterized in that a zero Poisson ratio material is adopted for filling to design an energy absorption box, the structure has excellent performance in the aspects of energy absorption and shock absorption, the process is simple, the manufacturing cost is relatively low, and the weight is lighter.
In order to achieve the purpose, the invention adopts the following technical scheme:
an electric vehicle battery box based on a variable thickness gradient zero Poisson ratio structure comprises an upper cover plate 1, an energy absorption box body 3, a box body plate a4, a box body plate b5 and a lower bottom plate 10; the upper cover plate 1, the two box body plates a4, the two box body plates b5 and the lower bottom plate 10 are assembled into a box body, and the energy-absorbing box body 3 is positioned in the box body; the energy absorption box body 3 comprises an aluminum alloy heat conduction plate 11, a carbon fiber heat absorption plate 12, a zero Poisson ratio three-dimensional structure material 13 and an energy absorption box upper cover plate 15, wherein the aluminum alloy heat conduction plate 11 is tightly attached to the battery body, the carbon fiber heat absorption plate 12 is tightly attached to the inner walls of a box body plate a4 and a box body plate b5, and the zero Poisson ratio three-dimensional structure material 13 is filled between the aluminum alloy heat conduction plate 11 and the carbon fiber heat absorption plate 12.
In the structure, the upper cover plate 1 and the lower base plate 10 are both provided with the grooves 6 matched with the batteries, so that the batteries are convenient to fix and install, the peripheries of the upper cover plate 1 and the lower base plate 10 are both provided with the threaded holes 14 which penetrate through the upper cover plate 1 and the lower base plate 10 and are aligned with the threaded holes 14 on the box body plate a4 and the box body plate b5, the upper cover plate 1 and the lower base plate 10 are assembled and matched with the box body plate a4 and the box body plate b5 through the screws 2, and the rubber gaskets are added in the middle; the lower base plate 10 is designed with a flange and a threaded hole 14, so that the lower base plate 10 can be conveniently installed on a vehicle body through the screw 2.
Box board a4, box board b5 both sides design has slope short-side board 16, and all design has screw hole 14, realize two box board a4 through screw 2 and nut 8, the installation of two box board b5, and the gasket is installed to cooperation department, box board a4 and the inside water course 17 that has designed respectively of box board b5, the outside design has water inlet 7 and delivery port 9, water inlet 7 and delivery port 9 are located the diagonal position in the box outside, make things convenient for the coolant liquid to circulate in box board inside, thereby dispel the heat and cool down the battery effectively, ensure that the battery normally works between its operating temperature.
Six batteries are arranged in the energy absorption box body 3, the outer side of the energy absorption box body 3 is a carbon fiber heat absorption plate, the inner clamping groove is formed by an aluminum alloy heat conduction plate in a surrounding mode, and the upper cover plate 15 of the energy absorption box is also made of aluminum alloy. The battery arranging clamping groove corresponds to the groove 6; the 1/4 design structure of the cellular structure of the zero poisson ratio three-dimensional structure material 13 is composed of a first vertical edge, a first oblique edge, a second oblique edge, a third oblique edge and a second vertical edge, a thickness gradient is designed through the change of the cellular thickness t, two cellular crosses form a most basic three-dimensional structure unit filled with the zero poisson ratio, and then the array of the three-dimensional structure units in two directions of X and Y is used for forming the overall three-dimensional structure of the zero poisson ratio material, the first oblique edge forms an angle alpha with the horizontal direction, the second oblique edge forms an angle beta with the horizontal direction, the third oblique edge forms an angle theta with the horizontal direction, wherein the angle alpha is an angle theta 45-60 degrees, the angle beta is an angle 45-72 degrees, and the vertical height Y/X is smaller than 3.
Has the advantages that: the invention provides an electric vehicle battery box based on a variable thickness gradient zero-Poisson ratio structure, which is characterized in that a variable thickness gradient cross-shaped zero-Poisson ratio material is filled in an energy absorption box body, the structure of the electric vehicle battery box is better than that of a traditional material in the aspects of energy absorption and shock absorption, and the electric vehicle battery box has the mechanical characteristic that the strain is zero in the direction vertical to a loaded surface, so that the damage and the influence of the vehicle on a battery when the vehicle is impacted can be better relieved; the cross-shaped cells with zero Poisson ratio are designed in a variable thickness gradient mode and are tiled in a layered mode, and compared with the traditional energy-absorbing material and the energy-absorbing structure with the zero Poisson ratio and the fixed thickness, the cross-shaped cells with the zero Poisson ratio have better energy-absorbing effect; the cross-shaped cells with zero Poisson ratio are easy to manufacture, the process is simple, most of the cells are made of aluminum alloy materials, the manufacturing cost is low, and the weight is lighter.
Drawings
FIG. 1 is a schematic diagram of a battery box assembly;
FIG. 2 is a diagram illustrating cell parameters of 1/4;
FIG. 3 is a schematic diagram of a variable thickness gradient cross-shaped zero Poisson's ratio structure;
FIG. 4 is a view of the interior filling structure of the crash box;
in the figure, 1 is an upper cover plate, 2 is a screw, 3 is an energy absorption box body, 4 is a box body plate a, 5 is a box body plate b, 6 is a groove, 7 is a water inlet, 8 is a nut, 9 is a water outlet, 10 is a lower bottom plate, 11 is an aluminum alloy heat conducting plate, 12 is a carbon fiber heat absorbing plate, 13 is a zero poisson's ratio three-dimensional structure material, 14 is a threaded hole, 15 is an energy absorption box upper cover plate, 16 is an inclined short side plate, and 17 is a water channel.
Detailed Description
The invention is described in detail below with reference to the following figures and specific examples:
example 1
As shown in fig. 1, an electric vehicle battery box based on a variable thickness gradient zero poisson's ratio structure comprises an upper cover plate 1, an energy absorption box body 3, a box body plate a4, a box body plate b5 and a lower base plate 10; the upper cover plate 1, the two box body plates a4, the two box body plates b5 and the lower bottom plate 10 are assembled into a box body, and the energy-absorbing box body 3 is positioned in the box body; the energy absorption box body 3 comprises an aluminum alloy heat conduction plate 11, a carbon fiber heat absorption plate 12, a zero poisson ratio three-dimensional structure material 13 and an energy absorption box upper cover plate 15, wherein the aluminum alloy heat conduction plate 11 is tightly attached to the battery body, the carbon fiber heat absorption plate 12 is tightly attached to the inner walls of a box body plate a4 and a box body plate b5, and as shown in fig. 4, the zero poisson ratio three-dimensional structure material 13 is filled between the aluminum alloy heat conduction plate 11 and the carbon fiber heat absorption plate 12.
In the structure, the upper cover plate 1 and the lower base plate 10 are both provided with the grooves 6 matched with the batteries, so that the batteries are convenient to fix and install, the peripheries of the upper cover plate 1 and the lower base plate 10 are both provided with the threaded holes 14 which penetrate through the upper cover plate 1 and the lower base plate 10 and are aligned with the threaded holes 14 on the box body plate a4 and the box body plate b5, the upper cover plate 1 and the lower base plate 10 are assembled and matched with the box body plate a4 and the box body plate b5 through the screws 2, and the rubber gaskets are added in the middle; the lower base plate 10 is designed with a flange and a threaded hole 14, so that the lower base plate 10 can be conveniently installed on a vehicle body through the screw 2.
Box board a4, box board b5 both sides design has slope short-side board 16, and all design has screw hole 14, realize two box board a4 through screw 2 and nut 8, the installation of two box board b5, and the gasket is installed to cooperation department, box board a4 and the inside water course 17 that has designed respectively of box board b5, the outside design has water inlet 7 and delivery port 9, water inlet 7 and delivery port 9 are located the diagonal position in the box outside, make things convenient for the coolant liquid to circulate in box board inside, thereby dispel the heat and cool down the battery effectively, ensure that the battery normally works between its operating temperature.
The energy-absorbing box body 3 is internally provided with six battery arrangement clamping grooves, the outer side of the energy-absorbing box body 3 is a carbon fiber heat absorbing plate, the internal clamping groove is formed by enclosing an aluminum alloy heat conducting plate, and the upper cover plate of the energy-absorbing box is also made of aluminum alloy. The battery arranging clamping groove corresponds to the groove 6; the 1/4 design structure of the cell structure of the zero poisson's ratio three-dimensional structural material 13 shown in fig. 2 and 3 is composed of a first vertical side, a first oblique side, a second oblique side, a third oblique side, and a second vertical side, the thickness gradient is designed through the change of the cell thickness t, the two cells are crossed to form a zero poisson's ratio filled most basic three-dimensional structural unit, and then the three-dimensional structural unit is arrayed in the X and Y directions to form the overall three-dimensional structure of the zero poisson's ratio material.
As shown in fig. 2, the first vertical dimension a is 2.6mm, the first diagonal dimension b is 4.5mm, the second diagonal dimension c is 4.5mm, the third diagonal dimension d is 4.8mm, and the second vertical dimension e/2 is 2.2 mm. The included angle alpha between the first oblique edge and the horizontal direction is 45 degrees, the included angle beta between the second oblique edge and the horizontal direction is 68 degrees, the included angle theta between the third oblique edge and the horizontal direction is 45 degrees, the height of each cell is designed to be h 2mm, the thickness of the variable thickness gradient cell has three thickness values, t is respectively1＝2mm，t2＝2.5mm，t33mm, each thickness is spread one layer according to t1，t2， t3，t1，t2，t3A, or t3，t2，t1，t3，t2，t1A, or t1，t2，t3，t2，t1，t2， t3The thicknesses of the components are horizontally spread from the battery box wall to the battery module.
The battery arrangement clamping groove is formed in the box body, and six battery modules can be placed in each box body. The wall thickness of the clamping groove is set to be 8mm, the energy absorption box around the battery is composed of an aluminum alloy heat conduction plate, a carbon fiber heat absorption plate and a zero Poisson ratio filling material, the thickness t1 of the aluminum alloy heat conduction plate is designed to be 5mm, and the carbon fiber heat absorption plate is designed to be 10 mm. The design parameters of the battery box body are strictly designed according to the national standard, and the material is aluminum alloy.
Example 2
As shown in fig. 1, an electric vehicle battery box based on a variable thickness gradient zero poisson's ratio structure comprises an upper cover plate 1, an energy absorption box body 3, a box body plate a4, a box body plate b5 and a lower base plate 10; the upper cover plate 1, the two box body plates a4, the two box body plates b5 and the lower bottom plate 10 are assembled into a box body, and the energy-absorbing box body 3 is positioned in the box body; the energy absorption box body 3 comprises an aluminum alloy heat conduction plate 11, a carbon fiber heat absorption plate 12, a zero poisson ratio three-dimensional structure material 13 and an energy absorption box upper cover plate 15, wherein the aluminum alloy heat conduction plate 11 is tightly attached to the battery body, the carbon fiber heat absorption plate 12 is tightly attached to the inner walls of a box body plate a4 and a box body plate b5, and as shown in fig. 4, the zero poisson ratio three-dimensional structure material 13 is filled between the aluminum alloy heat conduction plate 11 and the carbon fiber heat absorption plate 12.
In the structure, the upper cover plate 1 and the lower base plate 10 are both provided with the grooves 6 matched with the batteries, so that the batteries are convenient to fix and install, the peripheries of the upper cover plate 1 and the lower base plate 10 are both provided with the threaded holes 14 which penetrate through the upper cover plate 1 and the lower base plate 10 and are aligned with the threaded holes 14 on the box body plate a4 and the box body plate b5, the upper cover plate 1 and the lower base plate 10 are assembled and matched with the box body plate a4 and the box body plate b5 through the screws 2, and the rubber gaskets are added in the middle; the lower base plate 10 is designed with a flange and a threaded hole 14, so that the lower base plate 10 can be conveniently installed on a vehicle body through the screw 2.
Box board a4, box board b5 both sides design has slope short-side board 16, and all design has screw hole 14, realize two box board a4 through screw 2 and nut 8, the installation of two box board b5, and the gasket is installed to cooperation department, box board a4 and the inside water course 17 that has designed respectively of box board b5, the outside design has water inlet 7 and delivery port 9, water inlet 7 and delivery port 9 are located the diagonal position in the box outside, make things convenient for the coolant liquid to circulate in box board inside, thereby dispel the heat and cool down the battery effectively, ensure that the battery normally works between its operating temperature.
The energy-absorbing box body 3 is internally provided with six battery arrangement clamping grooves, the outer side of the energy-absorbing box body 3 is a carbon fiber heat absorbing plate, the internal clamping groove is formed by enclosing an aluminum alloy heat conducting plate, and the upper cover plate of the energy-absorbing box is also made of aluminum alloy. The battery arranging clamping groove corresponds to the groove 6; the 1/4 design structure of the cell structure of the zero poisson's ratio three-dimensional structural material 13 shown in fig. 2 and 3 is composed of a first vertical side, a first oblique side, a second oblique side, a third oblique side, and a second vertical side, the thickness gradient is designed through the change of the cell thickness t, the two cells are crossed to form a zero poisson's ratio filled most basic three-dimensional structural unit, and then the three-dimensional structural unit is arrayed in the X and Y directions to form the overall three-dimensional structure of the zero poisson's ratio material.
As shown in fig. 2, the first vertical dimension a is 2.6mm, the first diagonal dimension b is 4.5mm, the second diagonal dimension c is 4.5mm, the third diagonal dimension d is 4.8mm, and the second vertical dimension e/2 is 2.2 mm. The included angle alpha between the first oblique edge and the horizontal direction is 60 degrees, the included angle beta between the second oblique edge and the horizontal direction is 72 degrees, the included angle theta between the third oblique edge and the horizontal direction is 60 degrees, the height of each cell is designed to be h 2mm, the thickness of the variable thickness gradient cell has three thickness values, and t is respectively the thickness value of the variable thickness gradient cell1＝2mm，t2＝2.5mm，t33mm, each thickness is spread one layer according to t1，t2， t3，t1，t2，t3A, or t3，t2，t1，t3，t2，t1A, or t1，t2，t3，t2，t1，t2， t3Thickness ofThe tank wall is tiled towards the battery module.
The battery arrangement clamping groove is formed in the box body, and six battery modules can be placed in each box body. The wall thickness of the clamping groove is set to be 8mm, the energy absorption box around the battery is composed of an aluminum alloy heat conduction plate, a carbon fiber heat absorption plate and a zero Poisson ratio filling material, the thickness t1 of the aluminum alloy heat conduction plate is designed to be 5mm, and the carbon fiber heat absorption plate is designed to be 10 mm. The design parameters of the battery box body are strictly designed according to the national standard, and the material is aluminum alloy.
Example 3
As shown in fig. 1, an electric vehicle battery box based on a variable thickness gradient zero poisson's ratio structure comprises an upper cover plate 1, an energy absorption box body 3, a box body plate a4, a box body plate b5 and a lower base plate 10; the upper cover plate 1, the two box body plates a4, the two box body plates b5 and the lower bottom plate 10 are assembled into a box body, and the energy-absorbing box body 3 is positioned in the box body; the energy absorption box body 3 comprises an aluminum alloy heat conduction plate 11, a carbon fiber heat absorption plate 12, a zero poisson ratio three-dimensional structure material 13 and an energy absorption box upper cover plate 15, wherein the aluminum alloy heat conduction plate 11 is tightly attached to the battery body, the carbon fiber heat absorption plate 12 is tightly attached to the inner walls of a box body plate a4 and a box body plate b5, and as shown in fig. 4, the zero poisson ratio three-dimensional structure material 13 is filled between the aluminum alloy heat conduction plate 11 and the carbon fiber heat absorption plate 12.
In the structure, the upper cover plate 1 and the lower base plate 10 are both provided with the grooves 6 matched with the batteries, so that the batteries are convenient to fix and install, the peripheries of the upper cover plate 1 and the lower base plate 10 are both provided with the threaded holes 14 which penetrate through the upper cover plate 1 and the lower base plate 10 and are aligned with the threaded holes 14 on the box body plate a4 and the box body plate b5, the upper cover plate 1 and the lower base plate 10 are assembled and matched with the box body plate a4 and the box body plate b5 through the screws 2, and the rubber gaskets are added in the middle; the lower base plate 10 is designed with a flange and a threaded hole 14, so that the lower base plate 10 can be conveniently installed on a vehicle body through the screw 2.
Box board a4, box board b5 both sides design has slope short-side board 16, and all design has screw hole 14, realize two box board a4 through screw 2 and nut 8, the installation of two box board b5, and the gasket is installed to cooperation department, box board a4 and the inside water course 17 that has designed respectively of box board b5, the outside design has water inlet 7 and delivery port 9, water inlet 7 and delivery port 9 are located the diagonal position in the box outside, make things convenient for the coolant liquid to circulate in box board inside, thereby dispel the heat and cool down the battery effectively, ensure that the battery normally works between its operating temperature.
The energy-absorbing box body 3 is internally provided with six battery arrangement clamping grooves, the outer side of the energy-absorbing box body 3 is a carbon fiber heat absorbing plate, the internal clamping groove is formed by enclosing an aluminum alloy heat conducting plate, and the upper cover plate of the energy-absorbing box is also made of aluminum alloy. The battery arranging clamping groove corresponds to the groove 6; the 1/4 design structure of the cell structure of the zero poisson's ratio three-dimensional structural material 13 shown in fig. 2 and 3 is composed of a first vertical side, a first oblique side, a second oblique side, a third oblique side, and a second vertical side, the thickness gradient is designed through the change of the cell thickness t, the two cells are crossed to form a zero poisson's ratio filled most basic three-dimensional structural unit, and then the three-dimensional structural unit is arrayed in the X and Y directions to form the overall three-dimensional structure of the zero poisson's ratio material.
As shown in fig. 2, the first vertical dimension a is 2.6mm, the first diagonal dimension b is 4.5mm, the second diagonal dimension c is 4.5mm, the third diagonal dimension d is 4.8mm, and the second vertical dimension e/2 is 2.2 mm. The included angle alpha between the first oblique edge and the horizontal direction is 50 degrees, the included angle beta between the second oblique edge and the horizontal direction is 45 degrees, the included angle theta between the third oblique edge and the horizontal direction is 50 degrees, the height of each cell is designed to be h 2mm, the thickness of the variable thickness gradient cell has three thickness values, t is respectively1＝2mm，t2＝2.5mm，t33mm, each thickness is spread one layer according to t1，t2， t3，t1，t2，t3A, or t3，t2，t1，t3，t2，t1A, or t1，t2，t3，t2，t1，t2， t3The thicknesses of the components are horizontally spread from the battery box wall to the battery module.
The battery arrangement clamping groove is formed in the box body, and six battery modules can be placed in each box body. The wall thickness of the clamping groove is set to be 8mm, the energy absorption box around the battery is composed of an aluminum alloy heat conduction plate, a carbon fiber heat absorption plate and a zero Poisson ratio filling material, the thickness t1 of the aluminum alloy heat conduction plate is designed to be 5mm, and the carbon fiber heat absorption plate is designed to be 10 mm. The design parameters of the battery box body are strictly designed according to the national standard, and the material is aluminum alloy.
The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (8)

1. An electric vehicle battery box based on a variable thickness gradient zero Poisson ratio structure is characterized by comprising an upper cover plate (1), an energy absorption box body (3), a box body plate a (4), a box body plate b (5) and a lower bottom plate (10); the energy absorption box comprises an upper cover plate (1), two box body plates a (4), two box body plates b (5) and a lower bottom plate (10), wherein the upper cover plate, the two box body plates a (4), the two box body plates b (5) and the lower bottom plate (10) are assembled into a box body, and an energy absorption box body (3) is positioned in the box body; the energy-absorbing box body (3) comprises an aluminum alloy heat-conducting plate (11), a carbon fiber heat-absorbing plate (12), a zero-Poisson ratio three-dimensional structure material (13) and an energy-absorbing box upper cover plate (15), wherein the aluminum alloy heat-conducting plate (11) is tightly attached to a battery body, the carbon fiber heat-absorbing plate (12) is tightly attached to the inner walls of a box body plate a (4) and a box body plate b (5), the zero-Poisson ratio three-dimensional structure material (13) is filled between the aluminum alloy heat-conducting plate (11) and the carbon fiber heat-absorbing plate (12), and an 1/4 design structure of a cellular structure of the zero-Poisson ratio three-dimensional structure material (13) consists of a first vertical edge, a first oblique edge, a second oblique edge, a third oblique edge and a second vertical edge, the thickness gradient is designed through the change of the cell thickness t, the two cells are crossed to form the most basic three-dimensional structure unit filled with the zero Poisson ratio, and the overall three-dimensional structure of the material with the zero Poisson ratio is formed through the array of the three-dimensional structure units in the X direction and the Y direction.
2. The battery box of the electric vehicle based on the variable thickness gradient zero Poisson ratio structure as claimed in claim 1, wherein six battery mounting slots are arranged inside the energy absorption box body (3), the outer side of the energy absorption box body (3) is provided with a carbon fiber heat absorption plate, the inner slots are surrounded by an aluminum alloy heat conduction plate, the upper cover plate (15) of the energy absorption box is made of aluminum alloy, and the battery mounting slots correspond to the grooves (6).
3. The battery box of the electric vehicle based on the variable thickness gradient zero Poisson ratio structure as claimed in claim 1, wherein the upper cover plate (1) and the lower base plate (10) are both designed with a groove (6) matched with the battery, the peripheries of the upper cover plate (1) and the lower base plate (10) are both designed with a through threaded hole (14) aligned with the threaded holes (14) on the box body plate a (4) and the box body plate b (5), and the upper cover plate (1) and the lower base plate (10) are assembled and matched with the box body plate a (4) and the box body plate b (5) through screws (2).
4. The battery box of electric vehicle based on variable thickness gradient zero Poisson ratio structure as claimed in claim 3, wherein rubber gaskets are added between the upper cover plate (1), the lower base plate (10) and the box body plates a (4) and b (5).
5. The battery box of electric vehicle based on variable thickness gradient zero Poisson ratio structure as claimed in claim 1 or 3, characterized in that the lower base plate (10) is designed with a flange and a threaded hole 14 thereon, so that the lower base plate (10) is mounted on the vehicle body by the screw (2).
6. The battery box of the electric vehicle based on the variable thickness gradient zero Poisson ratio structure as claimed in claim 1, wherein the two sides of the box body plates a (4) and b (5) are designed with inclined short side plates (16) and threaded holes (14), the two box body plates a (4) and b (5) are installed through screws (2) and nuts (8), and the matching parts are installed with gaskets.
7. The battery box of electric vehicle based on thickness-variable gradient zero Poisson ratio structure as claimed in claim 1, wherein the inside of the box body plate a (4) and the box body plate b (5) are respectively designed with water channels (17), and the outside of the box body plate a (4) and the box body plate b (5) are respectively designed with a water inlet (7) and a water outlet (9).
8. The battery box of electric vehicle based on variable thickness gradient zero poisson's ratio structure as claimed in claim 7, characterized in that the water inlet (7) and the water outlet (9) are located at diagonal positions outside the box body.
CN201910801014.6A 2019-08-28 2019-08-28 Electric automobile battery box based on thickness-variable gradient zero Poisson ratio structure Active CN110660937B (en)

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