CN116494750A - Battery pack supporting device and electric automobile - Google Patents

Battery pack supporting device and electric automobile Download PDF

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Publication number
CN116494750A
CN116494750A CN202310746752.1A CN202310746752A CN116494750A CN 116494750 A CN116494750 A CN 116494750A CN 202310746752 A CN202310746752 A CN 202310746752A CN 116494750 A CN116494750 A CN 116494750A
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CN
China
Prior art keywords
frame
connecting plate
battery pack
lifting lug
bracket
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202310746752.1A
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Chinese (zh)
Other versions
CN116494750B (en
Inventor
林金源
曾龙
汤桃峰
游道亮
骆旭薇
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Jiangling Motors Corp Ltd
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Jiangling Motors Corp Ltd
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Priority to CN202310746752.1A priority Critical patent/CN116494750B/en
Publication of CN116494750A publication Critical patent/CN116494750A/en
Application granted granted Critical
Publication of CN116494750B publication Critical patent/CN116494750B/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • 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
    • B60L50/66—Arrangements of 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

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Battery Mounting, Suspending (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

The invention discloses a battery pack supporting device and an electric automobile, which comprise a plurality of brackets respectively connected with a battery pack lifting lug and a frame; the battery pack is connected with the frame through a plurality of brackets, each bracket is provided with a frame connecting plate, a box connecting plate, a connecting rod and a connecting piece, two ends of the connecting rod are respectively connected with the frame connecting plate and the box connecting plate through the connecting pieces, and the connecting rod can rotate along the axle center of the connecting piece; the frame is provided with a first longitudinal beam, a second longitudinal beam, a suspension fixing bracket and a plurality of cross beams; the first longitudinal beam and the second longitudinal beam are connected through a plurality of cross beams, the suspension fixing support enables the suspension assembly to be connected with the first longitudinal beam and the second longitudinal beam, the supporting device can swing adaptively when the frame is in torsional deformation, and the jumping displacement of the frame is compensated, so that the battery pack is more stable; the swing deformation of the supporting device prevents the battery pack from twisting along with the frame, reduces the mechanical load of the battery pack, and improves the reliability of the battery pack.

Description

Battery pack supporting device and electric automobile
Technical Field
The invention relates to the technical field of power batteries of electric automobiles, in particular to a battery pack supporting device and an electric automobile.
Background
In the prior art, a battery pack of an electric automobile is generally rigidly fixed on a chassis of the electric automobile, when the electric automobile runs on a torsion road surface with pits and protrusions, the chassis structure is distorted to a certain extent due to collision caused by large jump of wheels and suspensions, and further the battery pack rigidly connected with the chassis is driven to twist, and the distortion of the battery pack generally brings about noise and structural fatigue damage.
Particularly, the trapezoid frame of the cargo-carrying electric automobile is formed by riveting two longitudinal beams and a plurality of cross beams, the frame has lower torsional rigidity, namely, the left longitudinal beam and the right longitudinal beam of the frame can be greatly twisted when the electric automobile runs on a torsion road surface with pits and protrusions, a battery pack arranged on the frame is deformed in a twisting way along with the frame, and then a battery pack cover is bulged/concavely deformed and generates noise, the internal structure of the battery pack is mutually rubbed and extruded to cause abrasion of an insulating layer or structural cracking, and the durability and the safety of the battery pack are reduced.
In addition, the prior art also packs the battery on the bracket through the rubber suspension isolation seat, and the bottom bracket increases cost and weight and reduces the ground clearance of the vehicle, and the problem of poor durability caused by the bottom of suspension connection strength when the battery pack is lifted by the rubber suspension alone.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a battery pack supporting device and an electric automobile.
According to an embodiment of the first aspect of the present invention, a battery pack support device includes:
the plurality of brackets are respectively connected with the battery pack lifting lug and the frame; the battery pack is connected with the frame through the brackets, the first bracket is provided with a frame connecting plate, a box connecting plate, a first connecting rod and a connecting piece, two ends of the first connecting rod are respectively connected with the frame connecting plate and the box connecting plate through the connecting piece, and the first connecting rod can rotate along the axis of the connecting piece; the second bracket is provided with a frame connecting plate, a box connecting plate, a second connecting rod and a connecting piece, two ends of the second connecting rod are respectively connected with the frame connecting plate and the box connecting plate through the connecting piece, and the second connecting rod can rotate along the axis of the connecting piece; the third bracket is provided with a frame connecting plate, a box body bracket and a connecting piece, the frame connecting plate is connected with the box body bracket through the connecting piece, the box body bracket can rotate along the axis of the connecting piece, the fourth bracket is provided with a frame connecting plate, a box body connecting plate, a fourth connecting rod and the connecting piece, two ends of the fourth connecting rod are respectively connected with the frame connecting plate and the box body connecting plate through the connecting piece, the fourth connecting rod can rotate along the axis of the connecting piece, the fifth bracket is provided with a frame connecting plate, a box body connecting plate, a fifth connecting rod and the connecting piece, two ends of the fifth connecting rod are respectively connected with the frame connecting plate and the box body connecting plate through the connecting piece, and the fifth connecting rod can rotate along the axis of the connecting piece;
The frame is provided with a first longitudinal beam, a second longitudinal beam, a suspension fixing bracket and a plurality of cross beams; the first longitudinal beam and the second longitudinal beam are connected through a plurality of cross beams, and the suspension fixing support enables the suspension assembly to be connected with the first longitudinal beam and the second longitudinal beam; road surface load born by wheels in the running process of the electric automobile can be transferred to the suspension fixing support through the suspension assembly, and then the first longitudinal beam and the second longitudinal beam are stressed.
According to some embodiments of the invention, five lifting lugs are respectively arranged on the left side and the right side of the battery pack, the front end of the left side of the battery pack is a first lifting lug, and the left side of the battery pack is sequentially provided with a second lifting lug, a third lifting lug, a fourth lifting lug and a fifth lifting lug from the first lifting lug to the rear end of the battery pack, wherein the third lifting lug is arranged at a relatively central position of the left side of the battery pack; the front end of the right side of the battery pack is provided with a sixth lifting lug, and the right side of the battery pack is provided with a seventh lifting lug, an eighth lifting lug, a ninth lifting lug and a tenth lifting lug in sequence from the sixth lifting lug to the rear end of the battery pack, wherein the eighth lifting lug is arranged at a position relatively centered on the right side of the battery pack. The first lifting lug is connected with the frame through a first bracket, the second lifting lug is connected with the frame through a second bracket, the third lifting lug is connected with the frame through a third bracket, the fourth lifting lug is connected with the frame through a fourth bracket, and the fifth lifting lug is connected with the frame through a fifth bracket; the sixth lifting lug is connected with the frame through another fifth support, the seventh lifting lug is connected with the frame through another fourth support, the eighth lifting lug is connected with the frame through another third support, the ninth lifting lug is connected with the frame through another second support, and the tenth lifting lug is connected with the frame through another first support. The first lifting lug, the second lifting lug, the third lifting lug, the fourth lifting lug and the fifth lifting lug are connected with a first longitudinal beam of the frame, and the sixth lifting lug, the seventh lifting lug, the eighth lifting lug, the ninth lifting lug and the tenth lifting lug are connected with a second longitudinal beam of the frame.
It can be understood that a plurality of lifting lugs can be further arranged on the left side and the right side of the battery pack, such as seven lifting lugs, eight lifting lugs, ten lifting lugs and the like, the structure of the battery pack is consistent with the technical scheme, the mounting quantity of the battery pack can be changed through flexible arrangement of the lifting lugs, reasonable length adjustment is performed, and the space requirements of different vehicle types are met.
According to some embodiments of the invention, the first bracket is provided with a frame connecting plate, a box connecting plate, a first connecting rod and a connecting piece, two ends of the first connecting rod are respectively connected with the frame connecting plate and the box connecting plate through the connecting piece, an upper connecting point of the first connecting rod is connected with the frame connecting plate, and a lower connecting point of the first connecting rod is connected with the box connecting plate; the first connecting rod can rotate along the axis of the connecting piece, namely the box body connecting plate and the first connecting rod can swing relative to the frame connecting plate under the action of force; the frame connecting plate is connected with the frame and is L-shaped and comprises a first plate and a second plate which are connected, the first plate is rotatably and fixedly connected with the first connecting rod, the surface of the second plate is provided with a bolt through hole, the second plate is fixed with the frame through a bolt, and the upper surface of the second plate is defined as an upper plane, namely the upper plane of the frame connecting plate is attached to the lower surface of the frame; the box body connecting plate is connected with the first lifting lug of the battery pack, and is positioned below the frame connecting plate; the first connecting rod is of a symmetrical structure, the symmetrical line passes through the axle center of the connecting piece, and the included angle between the symmetrical line and the upper plane of the frame connecting plate is alpha, preferably, the included angle alpha is an acute angle; the first lifting lug of the battery pack can move relative to the frame by means of swinging of the first connecting rod; for example, the first lifting lug swings along the direction of increasing the included angle with the upper plane of the frame connecting plate, and can also be described as that the first lifting lug swings towards the rear end direction of the battery pack, namely, the included angle alpha increases, so that the distance between the first lifting lug of the battery pack and the frame connecting plate in the horizontal direction decreases, the distance between the first lifting lug of the battery pack and the frame connecting plate in the vertical direction increases, and the first lifting lug of the battery pack can also be described as that the first lifting lug of the battery pack moves backwards and downwards relative to the frame connecting plate. Conversely, the first lifting lug swings towards the front end direction of the battery pack, namely, the included angle alpha is reduced, so that the distance between the first lifting lug of the battery pack and the frame connecting plate in the horizontal direction is increased, the distance between the first lifting lug of the battery pack and the frame connecting plate in the vertical direction is reduced, and the first lifting lug of the battery pack can also be described as moving forwards and upwards relative to the frame connecting plate. The other first bracket is connected with a tenth lifting lug of the battery pack and the frame; the box body connecting plate is connected with a tenth lifting lug of the battery pack, and is positioned below the frame connecting plate; the first connecting rod is of a symmetrical structure, the symmetrical line passes through the axle center of the connecting piece, and the included angle between the symmetrical line and the upper plane of the frame connecting plate is alpha, preferably, the included angle alpha is an acute angle; the tenth lifting lug of the battery pack can move relative to the frame by means of the swinging of the first connecting rod; for example, the tenth lifting lug swings along the direction of increasing the included angle with the upper plane of the frame connecting plate, and can also be described as that the tenth lifting lug swings towards the front end direction of the battery pack, namely, the included angle alpha increases, so that the distance between the tenth lifting lug of the battery pack and the frame connecting plate in the horizontal direction decreases, the distance between the tenth lifting lug of the battery pack and the frame connecting plate in the vertical direction increases, and can also be described as that the tenth lifting lug of the battery pack moves forwards and downwards relative to the frame connecting plate. Conversely, the tenth lug swings towards the rear end direction of the battery pack, namely, the included angle alpha is reduced, so that the distance between the tenth lug of the battery pack and the frame connecting plate in the horizontal direction is increased, the distance between the tenth lug of the battery pack and the frame connecting plate in the vertical direction is reduced, and the tenth lug of the battery pack can also be described as backward and upward offset movement of the tenth lug of the battery pack relative to the frame connecting plate.
According to some embodiments of the invention, the second bracket is provided with a frame connecting plate, a box connecting plate, a second connecting rod and a connecting piece, two ends of the second connecting rod are respectively connected with the frame connecting plate and the box connecting plate through the connecting piece, an upper connecting point of the second connecting rod is connected with the frame connecting plate, and a lower connecting point of the second connecting rod is connected with the box connecting plate; the second connecting rod can rotate along the axis of the connecting piece, namely the box body connecting plate and the second connecting rod can swing relative to the frame connecting plate under the action of force; the frame connecting plate is connected with the frame, namely the upper plane of the frame connecting plate is attached to the lower surface of the frame; the box body connecting plate is connected with the second lifting lug of the battery pack, and is positioned below the frame connecting plate; the second connecting rod is of a symmetrical structure, the symmetrical line passes through the axis of the connecting piece and forms an included angle beta with the upper plane of the frame connecting plate, preferably, the included angle beta is an acute angle, and the included angle beta is larger than the included angle alpha. Alternatively, the first link and the second link have the same inclination direction, for example, the lower connection point of the first link is inclined toward the front end of the battery pack, and the lower connection point of the second link is inclined toward the front end of the battery pack. The second lifting lug of the battery pack can move relative to the frame by means of the swinging of the second connecting rod; for example, the second lifting lug swings along the direction of increasing the included angle with the upper plane of the frame connecting plate, and can also be described as that the second lifting lug swings towards the rear end direction of the battery pack, namely, the included angle beta increases, so that the distance between the second lifting lug of the battery pack and the frame connecting plate in the horizontal direction decreases, the distance between the second lifting lug of the battery pack and the frame connecting plate in the vertical direction increases, and the second lifting lug of the battery pack can also be described as that the second lifting lug of the battery pack moves backwards and downwards relative to the frame connecting plate. Conversely, the second lifting lug swings towards the front end direction of the battery pack, namely, the included angle alpha is reduced, so that the distance between the second lifting lug of the battery pack and the frame connecting plate in the horizontal direction is increased, the distance between the second lifting lug of the battery pack and the frame connecting plate in the vertical direction is reduced, and the second lifting lug of the battery pack can also be described as forward and upward offset movement of the second lifting lug of the battery pack relative to the frame connecting plate. The other second bracket is connected with a ninth lifting lug of the battery pack and the frame; the box body connecting plate is connected with a ninth lifting lug of the battery pack, and is positioned below the frame connecting plate; the second connecting rod is of a symmetrical structure, the symmetrical line passes through the axle center of the connecting piece and forms an included angle beta with the upper plane of the frame connecting plate, and preferably, the included angle beta is an acute angle; the ninth lifting lug of the battery pack can move relative to the frame by means of swinging of the second connecting rod; for example, the ninth lifting lug swings along the direction of increasing the included angle with the upper plane of the frame connecting plate, and can also be described as that the ninth lifting lug swings towards the front end direction of the battery pack, namely, the included angle beta increases, so that the distance between the ninth lifting lug of the battery pack and the frame connecting plate in the horizontal direction decreases, the distance between the ninth lifting lug of the battery pack and the frame connecting plate in the vertical direction increases, and the ninth lifting lug of the battery pack can also be described as that the ninth lifting lug of the battery pack moves forwards and downwards relative to the frame connecting plate. Conversely, the ninth lifting lug swings towards the rear end direction of the battery pack, namely, the included angle beta is reduced, so that the distance between the ninth lifting lug of the battery pack and the frame connecting plate in the horizontal direction is increased, the distance between the ninth lifting lug of the battery pack and the frame connecting plate in the vertical direction is reduced, and the ninth lifting lug of the battery pack can also be described as backward and upward offset movement of the ninth lifting lug of the battery pack relative to the frame connecting plate.
According to some embodiments of the invention, the third bracket is provided with a frame connecting plate, a box bracket and a connecting piece, wherein the frame connecting plate is connected with the box bracket through the connecting piece, the box bracket can rotate along the axis of the connecting piece, namely, the box bracket can swing relative to the frame connecting plate; the frame connecting plate is connected with the frame, namely the upper plane of the frame connecting plate is attached to the lower surface of the frame; the box body bracket is connected with a third lifting lug of the battery pack and is positioned below the frame connecting plate; the third lifting lug of the battery pack can move relative to the frame along the axis of the connecting piece, and even if the longitudinal beam of the frame inclines, the frame connecting plate inclines along with the longitudinal beam, and at the moment, the box body bracket can swing an angle relative to the frame connecting plate; the third lifting lug of the battery pack can still keep a horizontal state; the third lifting lug of the battery pack can swing relatively to the frame along the axis of the connecting piece, namely, the third lifting lug can move forwards and backwards relative to the frame. The other third bracket is connected with an eighth lifting lug of the battery pack and the frame; the eighth lifting lug of the battery pack can move relative to the frame along the axis of the connecting piece, and even if the longitudinal beam of the frame inclines, the frame connecting plate inclines along with the longitudinal beam, and at the moment, the box body bracket can swing an angle relative to the frame connecting plate; the eighth lifting lug of the battery pack can still keep a horizontal state; the eighth lifting lug of the battery pack can swing relative to the frame along the axis of the connecting piece, namely, the eighth lifting lug can move forward and backward relative to the frame.
According to some embodiments of the invention, the fourth bracket is provided with a frame connecting plate, a box connecting plate, a fourth connecting rod and a connecting piece, two ends of the fourth connecting rod are respectively connected with the frame connecting plate and the box connecting plate through the connecting piece, an upper connecting point of the fourth connecting rod is connected with the frame connecting plate, and a lower connecting point of the fourth connecting rod is connected with the box connecting plate; the fourth connecting rod can rotate along the axis of the connecting piece, namely the box body connecting plate and the fourth connecting rod can swing relative to the frame connecting plate under the action of force. The frame connecting plate is connected with the frame, namely the upper plane of the frame connecting plate is attached to the lower surface of the frame; the box body connecting plate is connected with a fourth lifting lug of the battery pack, and is positioned below the frame connecting plate; the fourth connecting rod is of a symmetrical structure, the symmetrical line passes through the axle center of the connecting piece and forms an included angle gamma with the upper plane of the frame connecting plate, and preferably, the included angle gamma is an acute angle; preferably, the fourth link and the second link have opposite inclination directions, for example, the lower connection point of the second link is inclined toward the front end of the battery pack, and the lower connection point of the fourth link is inclined toward the rear end of the battery pack. The fourth lifting lug of the battery pack can move relative to the frame by means of the swing of the fourth connecting rod; for example, the fourth lifting lug swings along the direction of reducing the included angle with the upper plane of the frame connecting plate, and can also be described as that the fourth lifting lug swings towards the rear end direction of the battery pack, namely, the included angle gamma is reduced, so that the distance between the fourth lifting lug of the battery pack and the frame connecting plate in the horizontal direction is increased, the distance between the fourth lifting lug of the battery pack and the frame connecting plate in the vertical direction is reduced, and the fourth lifting lug of the battery pack can also be described as that the fourth lifting lug of the battery pack moves backwards and upwards relative to the frame connecting plate. Conversely, the fourth lifting lug swings towards the front end direction of the battery pack, namely, the included angle gamma is increased, so that the distance between the fourth lifting lug of the battery pack and the frame connecting plate in the horizontal direction is reduced, the distance between the fourth lifting lug of the battery pack and the frame connecting plate in the vertical direction is increased, and the movement of the fourth lifting lug of the battery pack relative to the frame connecting plate in a forward and downward offset mode can be described. The other fourth bracket is connected with a seventh lifting lug of the battery pack and the frame; the box body connecting plate is connected with a seventh lifting lug of the battery pack, and is positioned below the frame connecting plate; the fourth connecting rod is of a symmetrical structure, the symmetrical line passes through the axle center of the connecting piece and forms an included angle gamma with the upper plane of the frame connecting plate, and preferably, the included angle gamma is an acute angle; the seventh lifting lug of the battery pack can move relative to the frame by means of the swing of the fourth connecting rod; for example, the seventh lifting lug swings along the direction of increasing the included angle with the upper plane of the frame connecting plate, and can also be described as that the seventh lifting lug swings towards the rear end direction of the battery pack, namely, the included angle gamma increases, so that the distance between the seventh lifting lug of the battery pack and the frame connecting plate in the horizontal direction decreases, the distance between the seventh lifting lug of the battery pack and the frame connecting plate in the vertical direction increases, and the seventh lifting lug of the battery pack can also be described as that the seventh lifting lug of the battery pack moves backwards and downwards relative to the frame connecting plate. Conversely, when the seventh lifting lug swings toward the front end of the battery pack, that is, the included angle γ decreases, the distance between the seventh lifting lug of the battery pack and the frame connecting plate in the horizontal direction increases, and the distance between the seventh lifting lug of the battery pack and the frame connecting plate in the vertical direction decreases, which may also be described as that the seventh lifting lug of the battery pack moves forward and upward relative to the frame connecting plate.
According to some embodiments of the invention, the fifth bracket is provided with a frame connecting plate, a box connecting plate, a fifth connecting rod and a connecting piece, two ends of the fifth connecting rod are respectively connected with the frame connecting plate and the box connecting plate through the connecting piece, an upper connecting point of the fifth connecting rod is connected with the frame connecting plate, and a lower connecting point of the fifth connecting rod is connected with the box connecting plate; the fifth connecting rod can rotate along the axis of the connecting piece, namely the box body connecting plate and the fifth connecting rod can swing relative to the frame connecting plate under the action of force. The frame connecting plate is connected with the frame, namely the upper plane of the frame connecting plate is attached to the lower surface of the frame; the box body connecting plate is connected with a fifth lifting lug of the battery pack, and is positioned below the frame connecting plate; the fifth connecting rod is of a symmetrical structure, the symmetrical line passes through the axle center of the connecting piece and forms an included angle epsilon with the upper plane of the frame connecting plate, preferably, the included angle epsilon is an acute angle, and the included angle epsilon is smaller than the included angle gamma; preferably, the fifth link and the first link have opposite inclination directions, for example, the lower connection point of the first link is inclined toward the front end of the battery pack, and the lower connection point of the fifth link is inclined toward the rear end of the battery pack. The fifth lifting lug of the battery pack can move relative to the frame by means of the swing of the fifth connecting rod; for example, the fifth lifting lug swings along the direction of reducing the included angle with the upper plane of the frame connecting plate, and can also be described as that the fifth lifting lug swings towards the rear end direction of the battery pack, namely, the included angle epsilon is reduced, so that the distance between the fifth lifting lug of the battery pack and the frame connecting plate in the horizontal direction is increased, the distance between the fifth lifting lug of the battery pack and the frame connecting plate in the vertical direction is reduced, and the fifth lifting lug of the battery pack can also be described as that the fifth lifting lug of the battery pack moves backwards and upwards relative to the frame connecting plate. Conversely, the fifth lifting lug swings towards the front end of the battery pack, namely, the included angle epsilon is increased, so that the distance between the fifth lifting lug of the battery pack and the frame connecting plate in the horizontal direction is reduced, the distance between the fifth lifting lug of the battery pack and the frame connecting plate in the vertical direction is increased, and the fifth lifting lug of the battery pack can also be described as forward and downward offset movement of the fifth lifting lug of the battery pack relative to the frame connecting plate. The other fifth bracket is connected with the sixth lifting lug of the battery pack and the frame; the box body connecting plate is connected with a sixth lifting lug of the battery pack, and is positioned below the frame connecting plate; the fifth connecting rod is in a symmetrical structure, the symmetrical line passes through the axle center of the connecting piece and forms an included angle epsilon with the upper plane of the frame connecting plate, and preferably, the included angle epsilon is an acute angle; the sixth lifting lug of the battery pack can move relative to the frame by means of the swing of the fifth connecting rod; for example, the sixth lifting lug swings along the direction of increasing the included angle with the upper plane of the frame connecting plate, and can also be described as that the sixth lifting lug swings towards the rear end direction of the battery pack, namely, the included angle epsilon increases, so that the distance between the sixth lifting lug of the battery pack and the frame connecting plate in the horizontal direction decreases, the distance between the sixth lifting lug of the battery pack and the frame connecting plate in the vertical direction increases, and the sixth lifting lug of the battery pack can also be described as that the sixth lifting lug of the battery pack moves backwards and downwards relative to the frame connecting plate. Conversely, the sixth lifting lug swings towards the front end of the battery pack, namely, the included angle epsilon is reduced, so that the distance between the sixth lifting lug of the battery pack and the frame connecting plate in the horizontal direction is increased, the distance between the sixth lifting lug of the battery pack and the frame connecting plate in the vertical direction is reduced, and the sixth lifting lug of the battery pack can also be described as forward and upward offset movement relative to the frame connecting plate.
According to some embodiments of the invention, the battery pack is arranged at the middle section of the frame, and the electric automobile runs on a twisted road surface with pits and protrusions; the left front wheel and the right rear wheel of the electric automobile move to the raised positions of the road surface, namely, the left front wheel is raised relative to the right front wheel, and the right rear wheel is raised relative to the left rear wheel. The left front wheel and the right rear wheel are lifted to compress the left front suspension assembly and the right rear suspension assembly, the left front suspension assembly further applies an upward load to the first longitudinal beam of the frame through the suspension fixing bracket, and the right rear suspension assembly further applies an upward load to the second longitudinal beam of the frame through the suspension fixing bracket; and then the front end of the first longitudinal beam of the frame is displaced upwards, and the rear end of the second longitudinal beam of the frame is displaced upwards, namely the first longitudinal beam and the second longitudinal beam of the frame are twisted relatively, and the frame connecting plate of the supporting device arranged on the frame moves along with the twisting of the frame. The first longitudinal beam rotates a certain angle along the clockwise direction and the second longitudinal beam rotates a certain angle along the anticlockwise direction when the electric automobile is viewed from the left side view angle. Because the battery pack has certain structural rigidity, the box body connecting plate of the first bracket and the first connecting rod can swing relative to the frame connecting plate, the force for forcing the deformation of the battery pack structure is far greater than the resistance of the first connecting rod to rotate along the axle center of the connecting piece, the movement of the first connecting rod relative to the frame connecting plate under the condition that the first longitudinal beam and the second longitudinal beam of the frame are twisted relatively can be better than the deformation of the battery pack structure, and the deformation/movement of the supporting device can be better than the deformation of the battery pack structure.
When the first longitudinal beam rotates by a certain angle along the clockwise direction, the frame connecting plate of the first bracket moves upwards along with the first longitudinal beam, the first bracket for fixing the first lifting lug of the battery pack can deform, namely the first connecting rod of the first bracket swings along the direction of increasing the included angle alpha, and the box connecting plate moves backwards and downwards in a shifting way relative to the frame connecting plate. The first lifting lug and the box body connecting plate of the battery pack cannot move upwards along with the frame connecting plate, and the first lifting lug of the battery pack moves backwards and eccentrically relative to the frame connecting plate.
When the first longitudinal beam rotates by a certain angle along the clockwise direction, the frame connecting plate of the second bracket moves upwards along with the first longitudinal beam, the second bracket for fixing the second lifting lug of the battery pack can deform, namely the second connecting rod of the second bracket swings along the direction of increasing the included angle beta, and the box connecting plate moves backwards and downwards in a shifting way relative to the frame connecting plate. The second lifting lug and the box body connecting plate of the battery pack cannot move upwards along with the frame connecting plate, and the second lifting lug of the battery pack moves backwards and eccentrically relative to the frame connecting plate.
When the first longitudinal beam rotates by a certain angle along the clockwise direction, the frame connecting plate of the third bracket rotates clockwise along with the first longitudinal beam, the third bracket for fixing the third lifting lug of the battery pack can deform, namely the box bracket of the third bracket can swing backwards by a certain angle along the axis of the connecting piece, and the box bracket swings backwards relative to the frame connecting plate. The third lifting lug of the battery pack still can be kept in a horizontal state when the frame connecting plate follows the first longitudinal beam to incline, and the third lifting lug of the battery pack moves in a backward offset mode relative to the frame connecting plate.
When the first longitudinal beam rotates by a certain angle along the clockwise direction, the frame connecting plate of the fourth bracket moves downwards along with the first longitudinal beam, the fourth bracket for fixing the fourth lifting lug of the battery pack can deform, namely the fourth connecting rod of the fourth bracket swings along the direction of reducing the included angle gamma, and the box connecting plate moves backwards and upwards in a shifting way relative to the frame connecting plate. The fourth lifting lug and the box body connecting plate of the battery pack cannot move downwards along with the frame connecting plate, and the fourth lifting lug of the battery pack moves backwards and eccentrically relative to the frame connecting plate.
When the first longitudinal beam rotates a certain angle along the clockwise direction, the frame connecting plate of the fifth bracket moves downwards along with the first longitudinal beam, the fifth bracket for fixing the fifth lifting lug of the battery pack can deform, namely the fifth connecting rod of the fifth bracket swings along the direction of reducing the included angle epsilon, and the box connecting plate moves backwards and upwards in a shifting way relative to the frame connecting plate. The fifth lifting lug and the box body connecting plate of the battery pack cannot move downwards along with the frame connecting plate, and the fifth lifting lug of the battery pack moves backwards and eccentrically relative to the frame connecting plate.
When the second longitudinal beam rotates a certain angle along the anticlockwise direction, the frame connecting plate of the fifth bracket arranged in front of the second longitudinal beam moves downwards along with the second longitudinal beam, the fifth bracket for fixing the sixth lifting lug of the battery pack can deform, namely the fifth connecting rod of the fifth bracket swings along the direction of reducing the included angle epsilon, and the box connecting plate moves forwards and upwards in a shifting way relative to the frame connecting plate. The sixth lifting lug of the battery pack and the box body connecting plate cannot move downwards along with the frame connecting plate, and the sixth lifting lug of the battery pack moves forwards and eccentrically relative to the frame connecting plate.
When the second longitudinal beam rotates a certain angle along the anticlockwise direction, the frame connecting plate of the fourth bracket arranged on the second longitudinal beam moves downwards along with the second longitudinal beam, the fourth bracket for fixing the seventh lifting lug of the battery pack can deform, namely the fourth connecting rod of the fourth bracket swings along the direction of reducing the included angle gamma, and the box connecting plate moves forwards and upwards in a shifting way relative to the frame connecting plate. The seventh lifting lug and the box body connecting plate of the battery pack cannot move downwards along with the frame connecting plate, and the seventh lifting lug of the battery pack moves forwards and eccentrically relative to the frame connecting plate.
When the second longitudinal beam rotates a certain angle along the anticlockwise direction, the frame connecting plate of the third bracket arranged on the second longitudinal beam rotates anticlockwise along the second longitudinal beam, the third bracket for fixing the eighth lifting lug of the battery pack can deform, namely the box bracket of the third bracket can swing forwards along the axis of the connecting piece for a certain angle, and the box bracket swings forwards relative to the frame connecting plate. The eighth lifting lug of the battery pack still can be kept in a horizontal state when the frame connecting plate follows the second longitudinal beam to incline, and the eighth lifting lug of the battery pack moves forwards and eccentrically relative to the frame connecting plate.
When the second longitudinal beam rotates a certain angle along the anticlockwise direction, the frame connecting plate of the second bracket arranged on the second longitudinal beam moves upwards along with the second longitudinal beam, the second bracket for fixing the ninth lifting lug of the battery pack can deform, namely the second connecting rod of the second bracket swings along the direction of increasing the included angle beta, and the box connecting plate moves forwards and downwards in a shifting manner relative to the frame connecting plate. The ninth lifting lug and the box body connecting plate of the battery pack cannot move upwards along with the frame connecting plate, and the ninth lifting lug of the battery pack moves forwards and eccentrically relative to the frame connecting plate.
When the second longitudinal beam rotates a certain angle along the anticlockwise direction, the frame connecting plate of the first bracket arranged at the rear of the second longitudinal beam moves upwards along with the second longitudinal beam, the first bracket for fixing the tenth lifting lug of the battery pack can deform, namely the first connecting rod of the first bracket swings along the direction of increasing the included angle alpha, and the box connecting plate moves forwards and downwards in a shifting manner relative to the frame connecting plate. The tenth lifting lug and the box body connecting plate of the battery pack can not move upwards along with the frame connecting plate, and the tenth lifting lug of the battery pack moves forwards and eccentrically relative to the frame connecting plate.
In the above embodiment, the battery pack is disposed at a middle section of the frame, and the electric vehicle travels on a twisted road surface having pits and protrusions; and then causes the first and second stringers of the frame to twist relatively, e.g., the first stringer rotates a certain angle in a clockwise direction and the second stringer rotates a certain angle in a counterclockwise direction as viewed from the left side view of the electric vehicle. At this time, the frame connecting plate of the supporting device mounted on the frame will move along with the torsion of the frame, and the deformation/movement of the supporting device will take precedence over the deformation of the structure of the battery pack, so that the horizontal direction of the battery pack will not deform along with the torsion of the frame, the left side of the battery pack will shift backwards relative to the first longitudinal beam, the right side of the battery pack will shift forwards relative to the second longitudinal beam, and it can be understood that the battery pack rotates anticlockwise by a certain angle from the top overlook view of the electric automobile. Similarly, when the first longitudinal beam rotates by a certain angle along the anticlockwise direction and the second longitudinal beam rotates by a certain angle along the clockwise direction from the left side view of the electric automobile, the battery pack rotates by a certain angle along the clockwise direction from the top overlook view of the electric automobile. The electric automobile runs on the twisted road surface with pits and protrusions, so that the first longitudinal beam and the second longitudinal beam of the frame are twisted relatively, and the battery pack cannot be twisted and deformed vertically; the deformation/movement of the support means may drive the battery pack to rotate/swing in a horizontal direction by a small extent. The supporting device enables the battery pack to be more stable when the electric automobile runs on a twisted road surface with pits and protrusions; the swing deformation of the supporting device prevents the battery pack from twisting along with the frame, reduces the mechanical load of the battery pack, and improves the reliability of the battery pack.
An electric vehicle according to an embodiment of the second aspect of the present invention includes a battery pack supporting apparatus according to an embodiment of the first aspect of the present invention.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of an electric vehicle;
FIG. 2 is a schematic diagram showing a connection mode between a battery pack and a frame in the prior art
FIG. 3 is a partial schematic view of an electric vehicle chassis;
FIG. 4 is a schematic diagram showing the deformation of the case cover in the case of torsion of the battery pack;
FIG. 5 is a schematic view of a battery pack case lid bulge;
FIG. 6 is a schematic view of a first bracket structure;
FIG. 7 is a schematic diagram of a first stent and a second stent;
FIG. 8 is a schematic view of a third bracket structure;
FIG. 9 is a schematic diagram of a fourth bracket and a fifth bracket in comparison;
FIG. 10 is a schematic view of a battery pack secured to a vehicle frame by a support device;
FIG. 11 is a partial view of FIG. 10;
FIG. 12 is a further partial view of FIG. 10;
FIG. 13 is a top view of FIG. 10;
FIG. 14 is a schematic view of a frame torsional deformation;
FIG. 15 is a schematic view of yet another frame torsional deformation;
FIG. 16 is an enlarged partial schematic view of FIG. 15;
FIG. 17 is a diagram showing the swing of the first bracket;
fig. 18 is a schematic view showing the horizontal deflection of the battery pack caused by the torsion of the frame.
Detailed Description
The following detailed description of embodiments of the present invention is exemplary, with reference to the accompanying drawings, it being understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit the application.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of the various associated listed items.
As shown in fig. 1 and 2, the electric vehicle 1 includes a vehicle body 11, a vehicle frame 12, a cargo box 13, a suspension assembly 14, wheels 15, and a battery pack 16, the vehicle body 11 and the cargo box 13 are mounted on the vehicle frame 12, the wheels 15 are connected to the vehicle frame 12 through the suspension assembly 14, and the battery pack 16 is mounted on the vehicle frame 12 through a battery pack bracket 17. The frame 12 is in a ladder shape, and the frame 12 is formed by connecting a first longitudinal beam 121, a second longitudinal beam 122 and a plurality of cross beams 123; to avoid cracking or breaking of the frame 12 after repeated torsional deformation, the longitudinal and transverse members of the frame 12 may be typically connected by riveting, i.e., the frame 12 is designed to have a low torsional stiffness. When the electric automobile 1 runs on a torsion road surface with pits and protrusions, the jump of the wheels 15 drives the first longitudinal beam 121 and the second longitudinal beam 122 of the frame 12 to relatively twist to a large extent, and the riveting process releases the rotational freedom degree of the joint, so that the relative twisting movement between the first longitudinal beam 121 and the second longitudinal beam 122 can not damage the frame 12.
As shown in fig. 2, 3, 4 and 5, the left side of the battery pack 16 is provided with a first lifting lug 21, a second lifting lug 22, a third lifting lug 23, a fourth lifting lug 24 and a fifth lifting lug 25; the right side of the battery pack 16 is provided with a sixth lifting lug 26, a seventh lifting lug 27, an eighth lifting lug 28, a ninth lifting lug 29 and a tenth lifting lug 30; the battery pack 16 is mounted on the frame 12 by a plurality of battery pack brackets 17; referring to fig. 3, when the electric vehicle 1 travels on a curved road with pits and projections, the first longitudinal beam 121 rotates clockwise along the first axis 12a, and the second longitudinal beam 122 rotates counterclockwise along the first axis 12a, i.e., the front end of the first longitudinal beam 121 is shifted upward, the rear end of the first longitudinal beam 121 is shifted downward, the front end of the second longitudinal beam 122 is shifted downward, and the rear end of the second longitudinal beam 122 is shifted upward. The movement of the first longitudinal beam 121 drives the battery pack bracket 17 to deflect upwards, and the battery pack bracket 17 deflects downwards; further, the shifting movement of the battery pack holder 17 drives the first and second lifting lugs 21 and 22 to shift upward, and simultaneously drives the fourth and fifth lifting lugs 24 and 25 to shift downward; similarly, the sixth tab 26 and the seventh tab 27 are offset downward, the ninth tab 29 and the tenth tab 30 are offset upward, and the arrow direction in fig. 4 indicates the tab offset direction of the battery pack 16. The rotation of the first longitudinal beam 121 in the clockwise direction along the first axis 12a and the rotation of the second longitudinal beam 122 in the counterclockwise direction along the first axis 12a force the battery pack case 161 to undergo torsional deformation; the battery pack case cover 162 is a thin-wall covering member, optionally, the battery pack case cover 162 is constructed by a steel plate with a thickness of 0.8mm, the battery pack case cover 162 and the battery pack case body 161 are mechanically connected through a plurality of bolts, torsional deformation of the battery pack case body 161 further causes the battery pack case cover 162 to bulge/dent deformation and generate noise, 162a indicates the bulge deformation area and morphology, repeated deformation of the battery pack case cover 162 can rub and squeeze with the internal structure of the battery pack 16 mutually to further cause abrasion of an insulating layer or structural cracking, and repeated torsional deformation of the battery pack case body 161 causes durability and safety reduction.
As shown in fig. 6, 7, 8, 9, 10, 11, 12 and 13, the supporting device 3 includes a plurality of brackets, which may include a first bracket 31, a second bracket 32, a third bracket 33, a fourth bracket 34 and a fifth bracket 35, the first bracket 31 connecting the first lifting lug 21 of the battery pack 16 and the first longitudinal beam 121 of the frame, the second bracket 32 connecting the second lifting lug 22 and the first longitudinal beam 121, the third bracket 33 connecting the third lifting lug 23 and the first longitudinal beam 121, the fourth bracket 34 connecting the fourth lifting lug 24 and the first longitudinal beam 121, the fifth bracket 35 connecting the fifth lifting lug 25 and the first longitudinal beam 121; a further fifth bracket 35 connects the sixth lifting lug 26 with the second longitudinal beam 122, a further fourth bracket 34 connects the seventh lifting lug 27 with the second longitudinal beam 122, a further third bracket 33 connects the eighth lifting lug 28 with the second longitudinal beam 122, a further second bracket 32 connects the ninth lifting lug 29 with the second longitudinal beam 122, and a further first bracket 31 connects the tenth lifting lug 30 with the second longitudinal beam 122. The first bracket 31 is provided with a frame connecting plate 4, a box connecting plate 5, a first connecting rod 6 and a connecting piece 7, the frame connecting plate 4 is L-shaped and comprises a first plate 42 and a second plate 43 which are connected, the first plate 42 and the first connecting rod 6 can be rotationally and fixedly connected, the surface of the second plate 43 is provided with a bolt through hole, and the second plate is fixed with the frame through a bolt, so that the upper surface of the second plate 43 is defined as an upper plane 41; the two ends of the first connecting rod 6 are respectively connected with the frame connecting plate 4 and the box connecting plate 5 through connecting pieces 7, the first connecting rod 6 can rotate along the axle center of the connecting pieces 7, namely the box connecting plate 5 and the first connecting rod 6 can swing relative to the frame connecting plate 4 under the action of force, for example, the box connecting plate 5 moves relative to a cross beam and drives the first connecting rod 6 to swing along the axle center of the connecting pieces 7; the second bracket 32 is provided with a frame connecting plate 4, a box connecting plate 5, a second connecting rod 62 and a connecting piece 7, two ends of the second connecting rod 62 are respectively connected with the frame connecting plate 4 and the box connecting plate 5 through the connecting piece 7, the second connecting rod 62 can rotate along the axis of the connecting piece 7, namely the box connecting plate 5 and the second connecting rod 62 can swing relative to the frame connecting plate 4 under the action of force; the third bracket 33 is provided with a frame connecting plate 4, a box bracket 332 and a connecting piece 7, wherein the frame connecting plate 4 is connected with the box bracket 332 through the connecting piece 7, the box bracket 332 can rotate along the axis of the connecting piece 7, namely, the box bracket 332 can swing relative to the frame connecting plate 4. The fourth bracket 34 is provided with a frame connecting plate 4, a box connecting plate 5, a fourth connecting rod 64 and a connecting piece 7, two ends of the fourth connecting rod 64 are respectively connected with the frame connecting plate 4 and the box connecting plate 5 through the connecting piece 7, the fourth connecting rod 64 can rotate along the axis of the connecting piece 7, namely the box connecting plate 5 and the fourth connecting rod 64 can swing relative to the frame connecting plate 4 under the action of force. The fifth bracket 35 is provided with a frame connecting plate 4, a box connecting plate 5, a fifth connecting rod 65 and a connecting piece 7, two ends of the fifth connecting rod 65 are respectively connected with the frame connecting plate 4 and the box connecting plate 5 through the connecting piece 7, the fifth connecting rod 65 can rotate along the axis of the connecting piece 7, namely the box connecting plate 5 and the fifth connecting rod 65 can swing relative to the frame connecting plate 4 under the action of force. The connecting piece 7 is preferably a rivet. Optionally, the supporting device 3 is mechanically connected to the frame 12, the battery pack case 161 by a plurality of fasteners 36; preferably, the frame connecting plate 4 is mechanically connected to the frame 12 by a plurality of bolts, the case connecting plate 5 is mechanically connected to the battery pack case 161 by a plurality of bolts, the frame connecting plate 4 is mechanically connected to the frame 12 by a plurality of bolts, and the case bracket 332 is mechanically connected to the battery pack case 161 by a plurality of bolts.
The frame 12 is provided with a first longitudinal beam 121, a second longitudinal beam 122, a suspension fixing bracket 124 and a plurality of cross beams 123; the first longitudinal beam 121 and the second longitudinal beam 122 are respectively provided with a plurality of suspension fixing brackets 124, and the suspension fixing brackets 124 connect the suspension assembly 14 with the first longitudinal beam 121 and the second longitudinal beam 122; alternatively, suspension assembly 14 is a leaf spring; road load born by the wheels 15 during running of the electric automobile 1 is transferred to the suspension fixing bracket 124 through the suspension assembly 14, so that the first longitudinal beam 121 and the second longitudinal beam 122 are stressed.
In the embodiment, 5 lifting lugs are respectively arranged at the left side and the right side of the battery pack 16, and an output panel 163 is arranged at the front end of the battery pack 16; the front end of the left side of the battery pack 16 is provided with a first lifting lug 21, and the left side of the battery pack 16 is provided with a second lifting lug 22, a third lifting lug 23, a fourth lifting lug 24 and a fifth lifting lug 25 in sequence from the first lifting lug 21 to the rear end direction of the battery pack 16, wherein the third lifting lug 23 is arranged at a position relatively centered on the left side of the battery pack 16; the front end of the right side of the battery pack 16 is provided with a sixth lifting lug 26, and the right side of the battery pack 16 is provided with a seventh lifting lug 27, an eighth lifting lug 28, a ninth lifting lug 29 and a tenth lifting lug 30 in sequence from the sixth lifting lug 26 to the rear end direction of the battery pack 16, wherein the eighth lifting lug 28 is arranged at a position relatively centered on the right side of the battery pack 16. The first lifting lug 21 is connected with a first longitudinal beam 121 of the frame 12 through a first bracket 31, the second lifting lug 22 is connected with the first longitudinal beam 121 of the frame 12 through a second bracket 32, the third lifting lug 23 is connected with the first longitudinal beam 121 of the frame 12 through a third bracket 33, the fourth lifting lug 24 is connected with the first longitudinal beam 121 of the frame 12 through a fourth bracket 34, and the fifth lifting lug 25 is connected with the first longitudinal beam 121 of the frame 12 through a fifth bracket 35; the sixth lifting lug 26 is connected with the second longitudinal beam 122 of the frame 12 through another fifth bracket 35, the seventh lifting lug 27 is connected with the second longitudinal beam 122 of the frame 12 through another fourth bracket 34, the eighth lifting lug 28 is connected with the second longitudinal beam 122 of the frame 12 through another third bracket 33, the ninth lifting lug 29 is connected with the second longitudinal beam 122 of the frame 12 through another second bracket 32, and the tenth lifting lug 30 is connected with the second longitudinal beam 122 of the frame 12 through another first bracket 31.
Referring to fig. 6, 7, 11 and 12, in some embodiments, the first bracket 31 is provided with a frame connecting plate 4, a box connecting plate 5, a first connecting rod 6 and a connecting piece 7, two ends of the first connecting rod 6 are respectively connected with the frame connecting plate 4 and the box connecting plate 5 through the connecting piece 7, an upper connecting point of the first connecting rod 6 is connected with the frame connecting plate 4, and a lower connecting point of the first connecting rod 6 is connected with the box connecting plate 5; the first connecting rod 6 can rotate along the axis of the connecting piece 7, namely the box body connecting plate 5 and the first connecting rod 6 can swing relative to the frame connecting plate 4 under the action of force; the first connecting rod 6 is of an elongated strip-shaped structure, the rigidity of the first connecting rod 6 in the thickness direction is lowest, and the large surface can be distorted and deformed to a certain extent under the action of external force. The frame connecting plate 4 is connected with the frame 12, namely the upper plane 41 of the frame connecting plate 4 is attached to the lower surface of the first longitudinal beam 121 of the frame 12; the box connecting plate 5 is connected with the first lifting lug 21 of the battery pack 16, optionally, the box connecting plate 5 is mechanically connected with the first lifting lug 21 through a plurality of bolts, and the box connecting plate 5 is positioned below the frame connecting plate 4 in the installation state; the first link 6 forms an angle α with the upper plane 41 of the frame attachment plate 4, preferably an acute angle α; the first lifting lug 21 of the battery pack 16 can move relative to the frame 12 by means of the swinging movement of the first link 6; for example, the first lifting lug 21 swings in a direction in which the included angle with the upper plane 41 of the frame connecting plate 4 increases, which may be also described as that the first lifting lug 21 swings toward the rear end of the battery pack 16, that is, the included angle α increases, and then the distance between the first lifting lug 21 of the battery pack 16 and the frame connecting plate 4 in the horizontal direction decreases, and the distance between the first lifting lug 21 and the frame connecting plate 4 in the vertical direction increases, which may be also described as that the first lifting lug 21 of the battery pack 16 moves back and forth with respect to the frame connecting plate 4. Conversely, when the first lifting lug 21 swings toward the front end of the battery pack 16, that is, the angle α decreases, the distance between the first lifting lug 21 of the battery pack 16 and the frame connecting plate 4 in the horizontal direction increases, and the distance between the first lifting lug 21 of the battery pack 16 in the vertical direction decreases, which may also be described as an upward and forward offset movement of the first lifting lug 21 of the battery pack 16 relative to the frame connecting plate 4. The other first bracket 31 connects the tenth lifting lug 30 of the battery pack 16 with the second longitudinal beam 122 of the frame 12; the box body connecting plate 5 is connected with a tenth lifting lug 30 of the battery pack 16, and the box body connecting plate 5 is positioned below the frame connecting plate 4 in the installation state; the included angle alpha between the symmetry line of the axis of the connecting piece and the upper plane 41 of the frame connecting plate 4 is preferably an acute angle; the tenth lifting lug 30 of the battery pack 16 can move relative to the frame 12 by means of the swinging movement of the first link 6; for example, the tenth lifting lug 30 swings in a direction in which the angle between the tenth lifting lug 30 and the upper plane 41 of the frame connecting plate 4 increases, and it may also be described that the tenth lifting lug 30 swings in the front direction of the battery pack 16, that is, the angle α increases, and then the distance between the tenth lifting lug 30 of the battery pack 16 and the frame connecting plate 4 in the horizontal direction decreases, and the distance between the tenth lifting lug 30 and the vertical direction increases, and it may also be described that the tenth lifting lug 30 of the battery pack 16 moves forward and downward with respect to the frame connecting plate 4. Conversely, when the tenth lifting lug 30 swings toward the rear end of the battery pack 16, that is, the angle α decreases, the distance between the tenth lifting lug 30 of the battery pack 16 and the frame connecting plate 4 in the horizontal direction increases, and the distance between the tenth lifting lug 30 of the battery pack 16 in the vertical direction decreases, which may also be described as a backward and upward offset movement of the tenth lifting lug 30 of the battery pack 16 with respect to the frame connecting plate 4.
Referring to fig. 7, 11 and 12, in some embodiments, the second bracket 32 is provided with a frame connecting plate 4, a box connecting plate 5, a second connecting rod 62 and a connecting piece 7, two ends of the second connecting rod 62 are respectively connected with the frame connecting plate 4 and the box connecting plate 5 through the connecting piece 7, an upper connecting point of the second connecting rod 62 is connected with the frame connecting plate 4, and a lower connecting point of the second connecting rod 62 is connected with the box connecting plate 5; the second connecting rod 62 can rotate along the axis of the connecting piece 7, namely the box body connecting plate 5 and the second connecting rod 62 can swing relative to the frame connecting plate 4 under the action of force; the frame connecting plate 4 is connected with the lower surface of the first longitudinal beam 121 of the frame 12, namely the upper plane 41 of the frame connecting plate 4 is attached to the lower surface of the first longitudinal beam 121; the box connecting plate 5 is connected with the second lifting lug 22 of the battery pack 16, optionally, the box connecting plate 5 is mechanically connected with the second lifting lug 22 through a plurality of bolts, and the box connecting plate 5 is positioned below the frame connecting plate 4 in the installation state; the second connecting rod 62 forms an angle beta with the upper plane 41 of the frame connecting plate 4 through the symmetry line of the axle center of the connecting piece, preferably, the angle beta is an acute angle, and the angle beta is larger than the angle alpha in the initial state. Alternatively, the first link 6 and the second link 62 have the same inclination direction, for example, the lower connection point of the first link 6 is inclined toward the front end of the battery pack 16, and the lower connection point of the second link 62 is inclined toward the front end of the battery pack 16. The second shackle 22 of the battery pack 16 is movable relative to the frame 12 by means of the swinging movement of the second link 62; for example, the second lifting lug 22 swings in a direction of increasing an included angle with the upper plane 41 of the frame connecting plate 4, which may also be described as that the second lifting lug 22 swings toward the rear end of the battery pack 16, that is, the included angle β increases, and then the distance between the second lifting lug 22 of the battery pack 16 and the frame connecting plate 4 in the horizontal direction decreases, and the distance between the second lifting lug 22 and the frame connecting plate 4 in the vertical direction increases, which may also be described as that the second lifting lug 22 of the battery pack 16 moves back and down relative to the frame connecting plate 4. Conversely, when the second lifting lug 22 swings toward the front end of the battery pack 16, that is, the included angle α decreases, the distance between the second lifting lug 22 of the battery pack 16 and the frame connecting plate 4 in the horizontal direction increases, and the distance between the second lifting lug 22 of the battery pack 16 in the vertical direction decreases, which may also be described as an upward and forward offset movement of the second lifting lug 22 of the battery pack 16 relative to the frame connecting plate 4. The other second bracket 32 connects the ninth lifting lug 29 of the battery pack 16 with the second longitudinal beam 122 of the frame 12; the box body connecting plate 5 is connected with a ninth lifting lug 29 of the battery pack 16, and the box body connecting plate 5 is positioned below the frame connecting plate 4 in the installation state; the second link 62 forms an angle β with the upper plane 41 of the frame attachment plate 4, preferably an acute angle β; the ninth shackle 29 of the battery pack 16 is movable relative to the frame 12 by means of the swinging movement of the second link 62; for example, the ninth lifting lug 29 swings in a direction in which the angle with the upper plane 41 of the frame connecting plate 4 increases, and it may also be described that the ninth lifting lug 29 swings toward the front end of the battery pack 16, that is, the angle β increases, and then the distance between the ninth lifting lug 29 of the battery pack 16 and the frame connecting plate 4 in the horizontal direction decreases, and the distance between the ninth lifting lug 29 and the frame connecting plate 4 in the vertical direction increases, and it may also be described that the ninth lifting lug 29 of the battery pack 16 moves forward and downward in a shifting manner with respect to the frame connecting plate 4. Conversely, when the ninth lifting lug 29 swings toward the rear end of the battery pack 16, that is, the angle β decreases, the distance between the ninth lifting lug 29 of the battery pack 16 and the frame connecting plate 4 in the horizontal direction increases, and the distance between the ninth lifting lug 29 and the frame connecting plate 4 in the vertical direction decreases, which may also be described as a backward and upward offset movement of the ninth lifting lug 29 ear of the battery pack 16 with respect to the frame connecting plate 4.
Referring to fig. 8, 11 and 12, in some embodiments, the third bracket 33 is provided with a frame connecting plate 4, a box bracket 332 and a connecting member 7, the frame connecting plate 4 and the box bracket 332 are connected by the connecting member 7, and the box bracket 332 can rotate along the axis of the connecting member 7, i.e., the box bracket 332 can swing relative to the frame connecting plate 4. The frame connecting plate 4 is connected with the frame 12, namely the upper plane of the frame connecting plate is attached to the lower surface of the first longitudinal beam 121 of the frame 12; the box bracket 332 is connected with the third lifting lug 23 of the battery pack 16, and the box bracket 332 is positioned below the frame connecting plate 4; the third lifting lug 23 of the battery pack 16 can relatively move with the frame 12 along the axis of the connecting piece 7, and one embodiment scene is that the first longitudinal beam 121 of the frame 12 is inclined, the frame connecting plate 4 is inclined along with the first longitudinal beam 121, and the box bracket 332 can swing at an angle relative to the frame connecting plate 4; so that the third lifting lug 23 of the battery pack 16 can still be maintained in a horizontal state. The third lifting lug 23 of the battery pack 16 can swing relative to the frame 12 along the axis of the connecting piece 7, namely, the third lifting lug 23 can perform forward and backward offset movement relative to the frame 12. The other third bracket 33 connects the eighth shackle 28 of the battery pack 16 with the second rail 122 of the frame 12; the eighth lifting lug 28 of the battery pack 16 can relatively move with the frame 12 along the axis of the connecting piece 7, even if the second longitudinal beam 122 of the frame 12 is inclined, the frame connecting plate 4 follows the inclination of the second longitudinal beam 122, and the box bracket 332 can swing at an angle relative to the frame connecting plate 4; the eighth lifting lug 28 of the battery pack 16 can still be kept in a horizontal state; the eighth lifting lug 28 of the battery pack 16 can swing relative to the frame 12 along the axis of the connecting piece 7, namely, the eighth lifting lug 28 can perform forward and backward offset movement relative to the frame 12.
Referring to fig. 9, 11 and 12, in some embodiments, the fourth bracket 34 is provided with a frame connecting plate 4, a box connecting plate 5, a fourth connecting rod 64 and a connecting piece 7, two ends of the fourth connecting rod 64 are respectively connected with the frame connecting plate 4 and the box connecting plate 5 through the connecting piece 7, and the fourth connecting rod 64 can rotate along the axis of the connecting piece 7, that is, the box connecting plate 5 and the fourth connecting rod 64 can swing relative to the frame connecting plate 4 under the action of force. The frame connecting plate 4 is connected with the first longitudinal beam 121 of the frame 12, namely the upper plane 41 of the frame connecting plate 4 is attached to the lower surface of the first longitudinal beam 121; the box body connecting plate 5 is connected with a fourth lifting lug 24 of the battery pack 16, and the box body connecting plate 5 is positioned below the frame connecting plate 4 in the installation state; the fourth link 64 is at an angle γ to the upper plane 41 of the frame attachment plate 4, preferably at an acute angle γ; preferably, the fourth link 64 and the second link 62 have opposite inclination directions, for example, the lower connection point of the second link 62 is inclined toward the front end of the battery pack 16, and then the lower connection point of the fourth link 64 is inclined toward the rear end of the battery pack 16, that is, the fourth link 64, the first longitudinal beam 121, the second link 62 and the battery pack case 161 are surrounded into a trapezoidal link structure, which is advantageous in that the fourth link 64 and the second link 62 together restrict the battery pack 16 from horizontal forward and backward translation or vertical up and down translation movement. The fourth shackle 24 of the battery pack 16 is movable relative to the frame 12 by means of the swinging movement of the fourth link 64; for example, the fourth lifting lug 24 swings in a direction in which the included angle with the upper plane 41 of the frame connecting plate 4 decreases, and it may also be described that the fourth lifting lug 24 swings toward the rear end of the battery pack 16, that is, the included angle γ decreases, and then the distance between the fourth lifting lug 24 of the battery pack 16 and the frame connecting plate 4 in the horizontal direction increases, and the distance between the fourth lifting lug 24 and the frame connecting plate 4 in the vertical direction decreases, and it may also be described that the fourth lifting lug 24 of the battery pack 16 performs a backward and upward offset motion with respect to the frame connecting plate 4. Conversely, when the fourth lifting lug 24 swings toward the front end of the battery pack 16, that is, the included angle γ increases, the distance between the fourth lifting lug 24 of the battery pack 16 and the frame connecting plate 4 in the horizontal direction decreases, and the distance between the fourth lifting lug 24 of the battery pack 16 in the vertical direction increases, which may also be described as a forward and downward offset movement of the fourth lifting lug 24 of the battery pack 16 relative to the frame connecting plate 4. Another fourth bracket 34 connects the seventh tab 27 of the battery pack 16 with the lower surface of the second rail 122 of the frame 12; the box body connecting plate 5 is connected with a seventh lifting lug 27 of the battery pack 16, and the box body connecting plate 5 is positioned below the frame connecting plate 4 in the installation state; the fourth connecting rod 64 forms an included angle gamma with the upper plane 41 of the frame connecting plate 4 through the symmetry line of the connecting piece axle center, and preferably the included angle gamma is an acute angle; the seventh lifting lug 27 of the battery pack 16 is movable relative to the frame 12 by means of the swinging movement of the fourth link 64; for example, the seventh lifting lug 27 swings in a direction in which the angle with the upper plane 41 of the frame connecting plate 4 increases, and it may also be described that the seventh lifting lug 27 swings in the rear end direction of the battery pack 16, that is, the angle γ increases, and then the distance between the seventh lifting lug 27 of the battery pack 16 and the frame connecting plate 4 in the horizontal direction decreases, and the distance between the seventh lifting lug 27 and the frame connecting plate 4 in the vertical direction increases, and it may also be described that the seventh lifting lug 27 of the battery pack 16 performs a backward and downward offset motion with respect to the frame connecting plate 4. Conversely, when the seventh lifting lug 27 swings toward the front end of the battery pack 16, that is, the angle γ decreases, the distance between the seventh lifting lug 27 of the battery pack 16 and the frame connecting plate 4 in the horizontal direction increases, and the distance between the seventh lifting lug 27 of the battery pack 16 in the vertical direction decreases, which may also be described as an upward and forward offset movement of the seventh lifting lug 27 of the battery pack 16 with respect to the frame connecting plate 4.
Referring to fig. 9, 11 and 12, in some embodiments, the fifth bracket 35 is provided with a frame connecting plate 4, a box connecting plate 5, a fifth connecting rod 65 and a connecting piece 7, two ends of the fifth connecting rod 65 are respectively connected with the frame connecting plate 4 and the box connecting plate 5 through the connecting piece 7, and the fifth connecting rod 65 can rotate along the axis of the connecting piece 7, that is, the box connecting plate 5 and the fifth connecting rod 65 can swing relative to the frame connecting plate 4 under the action of force. The frame connecting plate 4 is connected with the first longitudinal beam 121 of the frame 12, namely the upper plane 41 of the frame connecting plate 4 is attached to the lower surface of the first longitudinal beam 121 of the frame 12; the box body connecting plate 5 is connected with a fifth lifting lug 25 of the battery pack 16, and the box body connecting plate 5 is positioned below the frame connecting plate 4 in the installation state; the fifth link 65 has an angle epsilon with the upper plane 41 of the frame connecting plate 4, preferably an acute angle epsilon, which is smaller than the angle gamma; preferably, the fifth link 65 and the first link 6 have opposite inclination directions, for example, the lower connection point of the first link 6 is inclined toward the front end of the battery pack 16, and then the lower connection point of the fifth link 65 is inclined toward the rear end of the battery pack 16, that is, the fifth link 65, the first longitudinal beam 121, the first link 6 and the battery pack case 161 are surrounded into a trapezoid link structure, which is advantageous in that the fifth link 65 and the first link 6 together restrict the battery pack 16 from horizontal forward and backward translation or vertical up and down translation movement. The fifth lifting lug 25 of the battery pack 16 can move relative to the frame 12 by means of the swing of the fifth link 65; for example, the fifth lifting lug 25 swings in a direction in which the included angle with the upper plane 41 of the frame connecting plate 4 decreases, and it may also be described that the fifth lifting lug 25 swings toward the rear end of the battery pack 16, that is, the included angle epsilon decreases, and then the distance between the fifth lifting lug 25 of the battery pack 16 and the frame connecting plate 4 in the horizontal direction increases, and the distance between the fifth lifting lug 25 and the frame connecting plate 4 in the vertical direction decreases, and it may also be described that the fifth lifting lug 25 of the battery pack 16 performs a backward and upward offset motion relative to the frame connecting plate 4. Conversely, when the fifth lifting lug 25 swings toward the front end of the battery pack 16, that is, the included angle epsilon increases, the distance between the fifth lifting lug 25 of the battery pack 16 and the frame connecting plate 4 in the horizontal direction decreases, and the distance between the fifth lifting lug 25 of the battery pack 16 in the vertical direction increases, which may also be described as that the fifth lifting lug 25 of the battery pack 16 moves forward and downward in a shifting manner relative to the frame connecting plate 4. Another fifth bracket 35 connects the sixth lifting lug 26 of the battery pack 16 with the second longitudinal beam 122 of the frame 12; the box body connecting plate 5 is connected with a sixth lifting lug 26 of the battery pack 16, and the box body connecting plate 5 is positioned below the frame connecting plate 4 in the installation state; the fifth connecting rod 65 has an included angle epsilon with the upper plane 41 of the frame connecting plate 4 through the symmetry line of the axle center of the connecting piece, and preferably the included angle epsilon is an acute angle; the sixth shackle 26 of the battery pack 16 is movable relative to the frame 12 by means of the swinging movement of the fifth link 65; for example, the sixth lifting lug 26 swings in a direction in which the angle with the upper plane 41 of the frame connecting plate 4 increases, and it may also be described that the sixth lifting lug 26 swings in the rear end direction of the battery pack 16, that is, the angle epsilon increases, and then the distance between the sixth lifting lug 26 of the battery pack 16 and the frame connecting plate 4 in the horizontal direction decreases, and the distance between the sixth lifting lug 26 and the frame connecting plate 4 in the vertical direction increases, and it may also be described that the sixth lifting lug 26 of the battery pack 16 performs a backward and downward offset motion relative to the frame connecting plate 4. Conversely, when the sixth tab 26 swings toward the front end of the battery pack 16, i.e., the angle epsilon decreases, the distance between the sixth tab 26 of the battery pack 16 and the frame connecting plate 4 in the horizontal direction increases, and the distance between the sixth tab 26 of the battery pack 16 in the vertical direction decreases, which may also be described as a forward and upward offset movement of the sixth tab 26 of the battery pack 16 with respect to the frame connecting plate 4.
As shown in fig. 1, 11, 12, 13, 14, 15 and 16, in one embodiment, the battery pack 16 is disposed at a middle position of the frame 12, and the electric vehicle 1 travels on a twisted road surface having pits and projections; the left front wheel and the right rear wheel of the electric automobile 1 move to the raised positions of the road surface, namely, the left front wheel is raised relative to the right front wheel, and the right rear wheel is raised relative to the left rear wheel. Lifting the left front wheel and the right rear wheel compresses the left front suspension assembly 14 and the right rear suspension assembly 14, the left front suspension assembly 14 further applies an upward load to the first longitudinal beam 121 of the frame 12 via the suspension brackets 124, and the right rear suspension assembly 14 further applies an upward load to the second longitudinal beam 122 of the frame 12 via the suspension brackets 124; further, the front end of the first longitudinal beam 121 of the frame 12 is displaced upwards, and the rear end of the second longitudinal beam 122 of the frame 12 is displaced upwards, namely the first longitudinal beam 121 and the second longitudinal beam 122 of the frame 12 are twisted relatively, and the arrow direction in fig. 14 indicates the movement direction of the first longitudinal beam 121 and the second longitudinal beam 122; the frame connection plate 4 of the support device 3 mounted on the frame 12 will move with the torsion of the frame 12. The first side member 121 rotates by a predetermined angle in the clockwise direction and the second side member 122 rotates by a predetermined angle in the counterclockwise direction when viewed from the left side of the electric vehicle 1, and fig. 15 illustrates a state in which the first side member 121 and the second side member 122 rotate by a predetermined angle along the first axis 12a, and the first axis 12a is located substantially above the third bracket 33. Since the battery pack 16 has a certain structural rigidity, and the case connecting plate 5 and the first connecting rod 6 of the first bracket 31 can swing relative to the frame connecting plate 4, the force required for forcing the structural deformation of the battery pack 16 is much greater than the resistance of the first connecting rod 6 to rotate along the axis of the connecting member 7, it can be understood that the movement of the first connecting rod 6 relative to the frame connecting plate 4 will take precedence over the structural deformation of the battery pack 16 in the case that the first longitudinal beam 121 and the second longitudinal beam 122 of the frame 12 are twisted relatively, and similarly, the deformation/movement of the other brackets of the supporting device 3 will take precedence over the structural deformation of the battery pack 16.
As shown in fig. 17, when the first longitudinal beam 121 rotates clockwise along the first axis 12a by a certain angle, and the frame connecting plate 4 of the first bracket 31 moves upward along with the first longitudinal beam 121, the first bracket 31 of the first lifting lug 21 for fixing the battery pack 16 will deform, i.e. the first link 6 of the first bracket 31 swings along the direction in which the included angle α increases, i.e. the first link 6 swings along the direction indicated by K1 in fig. 17, and the first link 6 swings by an angle A1; the box connecting plate 5 makes a backward and downward offset motion relative to the frame connecting plate 4, that is, the box connecting plate 5 is offset backward along the direction K2 in fig. 17 and is also offset downward along the direction K3. The first lifting lug 21 of the battery pack 16 and the box body connecting plate 5 cannot move upwards along with the frame connecting plate 4, and the first lifting lug 21 of the battery pack 16 moves backwards and downwards relative to the frame connecting plate 4 of the first bracket 31, namely, the first lifting lug 21 of the battery pack 16 moves backwards and the height direction is kept approximately in an initial state.
Similarly, when the first longitudinal beam 121 rotates clockwise along the first axis 12a by a certain angle, and the frame connecting plate 4 of the second bracket 32 moves upward along with the first longitudinal beam 121, the second bracket 32 of the second lifting lug 22 for fixing the battery pack 16 will deform, that is, the second connecting rod 62 of the second bracket 32 swings along the direction of increasing the included angle β, and the box connecting plate 5 moves backward and downward relative to the frame connecting plate 4. The second lifting lug 22 of the battery pack 16 and the box body connecting plate 5 cannot move upwards along with the frame connecting plate 4, and the second lifting lug 22 of the battery pack 16 moves backwards and downwards relative to the frame connecting plate 4, namely, the second lifting lug 22 of the battery pack 16 is backwards deflected while the height direction is approximately maintained in an initial state.
When the first longitudinal beam 121 rotates clockwise along the first axis 12a by a certain angle, the frame connecting plate of the third bracket 33 rotates clockwise along with the first longitudinal beam 121, the third bracket 33 for fixing the third lifting lug 23 of the battery pack 16 will deform, that is, the box bracket 332 of the third bracket 33 can swing backward by a certain angle along the axis of the connecting piece 7, and the box bracket 332 swings backward relative to the frame connecting plate. When the frame connecting plate inclines along with the first longitudinal beam 121, the third lifting lug 23 of the battery pack 16 can still be kept in a horizontal state, and the third lifting lug 23 of the battery pack 16 moves backwards and forwards relative to the frame connecting plate.
When the first longitudinal beam 121 rotates clockwise along the first axis 12a by a certain angle, the frame connecting plate 4 of the fourth bracket 34 moves downward along with the first longitudinal beam 121, the fourth bracket 34 for fixing the fourth lifting lug 24 of the battery pack 16 will deform, that is, the fourth connecting rod 64 of the fourth bracket 34 swings along the direction of decreasing the included angle γ, and the box connecting plate 5 moves back and up relative to the frame connecting plate 4. The fourth lifting lug 24 and the box body connecting plate 5 of the battery pack 16 cannot move downwards along with the frame connecting plate 4, and the fourth lifting lug 24 of the battery pack 16 moves backwards and upwards relative to the frame connecting plate 4, namely, the fourth lifting lug 24 of the battery pack 16 moves backwards and the height direction is kept approximately in an initial state.
When the first longitudinal beam 121 rotates clockwise along the first axis 12a by a certain angle, the frame connecting plate 4 of the fifth bracket 35 moves downward along with the first longitudinal beam 121, the fifth bracket 35 of the fifth lifting lug 25 for fixing the battery pack 16 will deform, that is, the fifth connecting rod 65 of the fifth bracket 35 swings along the direction of decreasing the included angle epsilon, and the box connecting plate 5 moves back and up relative to the frame connecting plate 4. The fifth lifting lug 25 of the battery pack 16 and the box body connecting plate 5 cannot move downwards along with the frame connecting plate 4, and the fifth lifting lug 25 of the battery pack 16 moves backwards and upwards relative to the frame connecting plate 4, namely, the fifth lifting lug 25 of the battery pack 16 moves backwards and the height direction is kept approximately in an initial state.
When the second longitudinal beam 122 rotates by a certain angle along the counterclockwise direction of the first axis 12a, the frame connecting plate 4 of the fifth bracket 35 mounted in front of the second longitudinal beam 122 moves downward along with the second longitudinal beam 122, the fifth bracket 35 of the sixth lifting lug 26 for fixing the battery pack 16 will deform, that is, the fifth connecting rod 65 of the fifth bracket 35 swings along the direction of decreasing the included angle epsilon, and the box connecting plate 5 moves forward and upward with respect to the frame connecting plate 4. The sixth lifting lug 26 of the battery pack 16 and the box body connecting plate 5 cannot move downwards along with the frame connecting plate 4, and the sixth lifting lug 26 of the battery pack 16 moves forwards and upwards relative to the frame connecting plate 4, namely, the sixth lifting lug 26 of the battery pack 16 moves forwards and the height direction is kept approximately in the initial state.
When the second longitudinal beam 122 rotates by a certain angle along the counterclockwise direction of the first axis 12a, the frame connecting plate 4 of the fourth bracket 34 mounted in front of the second longitudinal beam 122 moves downward along with the second longitudinal beam 122, the fourth bracket 34 of the seventh lifting lug 27 for fixing the battery pack 16 will deform, that is, the fourth connecting rod 64 of the fourth bracket 34 swings along the direction of decreasing the included angle γ, and the box connecting plate 5 moves forward and upward with respect to the frame connecting plate 4. The seventh lifting lug 27 of the battery pack 16 and the box body connecting plate 5 cannot move downwards along with the frame connecting plate 4, and the seventh lifting lug 27 of the battery pack 16 moves forwards and upwards relative to the frame connecting plate 4, namely, the seventh lifting lug 27 of the battery pack 16 moves forwards and the height direction is kept in an initial state approximately.
When the second longitudinal beam 122 rotates along the first axis 12a by a certain angle in the counterclockwise direction, the frame connecting plate of the third bracket 33 mounted on the second longitudinal beam 122 rotates along the second longitudinal beam 122 in the counterclockwise direction, the third bracket 33 of the eighth lifting lug 28 for fixing the battery pack 16 will deform, that is, the box bracket 332 of the third bracket 33 can swing forward by a certain angle along the axis of the connecting piece 7, and the box bracket 332 swings forward relative to the frame connecting plate. The eighth lifting lug 28 of the battery pack 16 can still be kept in a horizontal state when the frame connecting plate is inclined along with the second longitudinal beam 122, and the eighth lifting lug 28 of the battery pack 16 moves forwards and offset relative to the frame connecting plate.
When the second longitudinal beam 122 rotates by a certain angle along the counterclockwise direction of the first axis 12a, the frame connecting plate 4 of the second bracket 32 mounted behind the second longitudinal beam 122 moves upward along with the second longitudinal beam 122, the second bracket 32 of the ninth lifting lug 29 for fixing the battery pack 16 will deform, that is, the second connecting rod 62 of the second bracket 32 swings along the direction of increasing the included angle β, and the box connecting plate 5 moves forward and downward with respect to the frame connecting plate 4. The ninth lifting lug 29 of the battery pack 16 and the box body connecting plate 5 cannot move upwards along with the frame connecting plate 4, and the ninth lifting lug 29 of the battery pack 16 moves forwards and downwards relative to the frame connecting plate 4, namely, the ninth lifting lug 29 of the battery pack 16 moves forwards and the height direction is kept approximately in an initial state.
When the second longitudinal beam 122 rotates along the first axis 12a counterclockwise by a certain angle, the frame connecting plate 4 of the first bracket 31 mounted behind the second longitudinal beam 122 moves upward along with the second longitudinal beam 122, the first bracket 31 of the tenth lifting lug 30 for fixing the battery pack 16 will deform, i.e. the first connecting rod 6 of the first bracket 31 swings along the direction of increasing the included angle α, and the box connecting plate 5 moves forward and downward with respect to the frame connecting plate 4. The tenth lifting lug 30 of the battery pack 16 and the box body connecting plate 5 cannot move upwards along with the frame connecting plate 4, and the tenth lifting lug 30 of the battery pack 16 moves forwards and downwards relative to the frame connecting plate 4, namely, the tenth lifting lug 30 of the battery pack 16 moves forwards and the height direction is kept approximately in the initial state.
In the above embodiment, the battery pack 16 is arranged at the middle position of the frame 12, and the electric vehicle 1 travels on a twisted road surface with pits and projections; further, the first side member 121 and the second side member 122 of the frame 12 are twisted relatively, for example, when the electric vehicle 1 is viewed from the left side, the first side member 121 is rotated by a certain angle in the clockwise direction, the second side member 122 is rotated by a certain angle in the counterclockwise direction, and fig. 15 illustrates a state in which the first side member 121 and the second side member 122 are rotated by a certain angle along the first axis 12a, and the first axis 12a is located substantially above the third bracket 33. The frame connecting plate 4 and the connecting rod of the supporting device 3 mounted on the frame 12 will move along with the torsion of the frame 12, and the deformation/movement of the supporting device 3 will take precedence over the structural deformation of the battery pack 16, namely, the plurality of first connecting rods 6, second connecting rods 62, fourth connecting rods 64, fifth connecting rods 65 and the box bracket 332 of the supporting device 3 will swing rotationally along the axle center of the connecting piece 7; so that the battery pack 16 is not greatly deformed in the horizontal direction following the torsion of the frame 12, the first, second, third, fourth and fifth lifting lugs 21, 22, 23, 24 and 25 of the battery pack 16 are shifted rearward, and the sixth, seventh, eighth, ninth and tenth lifting lugs 26, 27, 28, 29 and 30 of the battery pack are shifted forward; that is, the left side of the battery pack 16 will be offset backward with respect to the first longitudinal beam 121, and the right side of the battery pack 16 will be offset forward with respect to the second longitudinal beam 122, which can be understood as that the battery pack 16 rotates a certain angle in a counterclockwise direction when viewed from the top of the electric vehicle 1; fig. 18 illustrates the battery pack 16 rotated counterclockwise by a certain angle along the second axis 16 b. The side of the battery pack 16 is generally parallel to the first longitudinal beam 121 before the frame 12 is twisted, and after the frame 12 is twisted, the battery pack 16 is rotated counterclockwise along the second axis 16b to an angle A2 with the first longitudinal beam 121. Similarly, when the first side member 121 rotates by a predetermined angle in the counterclockwise direction and the second side member 122 rotates by a predetermined angle in the clockwise direction as viewed from the left side of the electric vehicle 1, the battery pack 16 rotates by a predetermined angle in the clockwise direction as viewed from the top of the electric vehicle 1. Namely, the electric automobile 1 runs on a torsion road surface with pits and protrusions, so that the first longitudinal beam 121 and the second longitudinal beam 122 of the frame 12 are twisted relatively, and the battery pack 16 cannot be twisted and deformed along with the deformation of the frame 12 in the vertical direction; the deformation/movement of the support means 3 will drive the battery pack 16 to rotate/oscillate in a small amplitude in a nearly horizontal direction. The electric automobile 1 supports the device 3 to make the battery pack 16 more stable when running on a twisted road surface with pits and protrusions; the swinging deformation of the supporting device 3 prevents the battery pack 16 from twisting along with the frame 12, reduces the mechanical load of the battery pack 16, and improves the reliability of the battery pack 16.
The foregoing description of the preferred embodiments of the present invention is provided for the purpose of aiding in the understanding of the method and its core concept, and is not intended to limit the invention; it will be apparent to those skilled in the art that various changes and modifications can be made in the present invention without departing from the spirit or scope of the invention, and it is intended to cover all such modifications, equivalents, or improvements in the embodiments as fall within the true spirit and scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the invention.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.
It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application for the embodiment. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A battery pack support device, comprising:
the plurality of brackets are respectively connected with the battery pack lifting lug and the frame; the battery pack is connected with the frame through the brackets, the first bracket is provided with a frame connecting plate, a box connecting plate, a first connecting rod and a connecting piece, two ends of the first connecting rod are respectively connected with the frame connecting plate and the box connecting plate through the connecting piece, and the first connecting rod can rotate along the axis of the connecting piece; the second bracket is provided with a frame connecting plate, a box connecting plate, a second connecting rod and a connecting piece, two ends of the second connecting rod are respectively connected with the frame connecting plate and the box connecting plate through the connecting piece, and the second connecting rod can rotate along the axis of the connecting piece; the third bracket is provided with a frame connecting plate, a box body bracket and a connecting piece, the frame connecting plate is connected with the box body bracket through the connecting piece, the box body bracket can rotate along the axis of the connecting piece, the fourth bracket is provided with a frame connecting plate, a box body connecting plate, a fourth connecting rod and a connecting piece, two ends of the fourth connecting rod are respectively connected with the frame connecting plate and the box body connecting plate through the connecting piece, the fourth connecting rod can rotate along the axis of the connecting piece, the fifth bracket is provided with a frame connecting plate, a box body connecting plate, a fifth connecting rod and the connecting piece, two ends of the fifth connecting rod are respectively connected with the frame connecting plate and the box body connecting plate through the connecting piece, and the fifth connecting rod can rotate along the axis of the connecting piece;
The frame is provided with a first longitudinal beam, a second longitudinal beam, a suspension fixing bracket and a plurality of cross beams; the first longitudinal beam and the second longitudinal beam are connected through a plurality of cross beams, and the suspension fixing support enables the suspension assembly to be connected with the first longitudinal beam and the second longitudinal beam.
2. The battery pack supporting device according to claim 1, wherein the left side and the right side of the battery pack are respectively provided with five lifting lugs, the front end of the left side of the battery pack is provided with a first lifting lug, the left side of the battery pack is provided with a second lifting lug, a third lifting lug, a fourth lifting lug and a fifth lifting lug in sequence from the first lifting lug to the rear end of the battery pack, and the third lifting lug is arranged at a relatively central position of the left side of the battery pack; the front end of the right side of the battery pack is provided with a sixth lifting lug, a seventh lifting lug, an eighth lifting lug, a ninth lifting lug and a tenth lifting lug are sequentially arranged on the right side of the battery pack from the sixth lifting lug to the rear end of the battery pack, wherein the eighth lifting lug is arranged at a position relatively centered on the right side of the battery pack, the first lifting lug is connected with the frame through a first bracket, the second lifting lug is connected with the frame through a second bracket, the third lifting lug is connected with the frame through a third bracket, the fourth lifting lug is connected with the frame through a fourth bracket, and the fifth lifting lug is connected with the frame through a fifth bracket; the sixth lug is connected with the frame through another fifth support, the seventh lug is connected with the frame through another fourth support, the eighth lug is connected with the frame through another third support, the ninth lug is connected with the frame through another second support, the tenth lug is connected with the frame through another first support, first lug, second lug, third lug, fourth lug and fifth lug are connected with the first longeron of frame, sixth lug, seventh lug, eighth lug, ninth lug and tenth lug are connected with the second longeron of frame.
3. The battery pack supporting apparatus according to claim 2, wherein the first bracket is provided with a frame connecting plate, a box connecting plate, a first connecting rod and a connecting piece, both ends of the first connecting rod are respectively connected with the frame connecting plate and the box connecting plate through the connecting piece, an upper connecting point of the first connecting rod is connected with the frame connecting plate, and a lower connecting point of the first connecting rod is connected with the box connecting plate; the first connecting rod can rotate along the axis of the connecting piece; the frame connecting plate is connected with the frame; the box body connecting plate is connected with the first lifting lug of the battery pack, and is positioned below the frame connecting plate; the included angle between the symmetry line of the first connecting rod passing through the axle center of the connecting piece and the upper plane of the frame connecting plate is alpha.
4. A battery pack support device according to claim 3, wherein the included angle α is an acute angle.
5. The battery pack supporting apparatus according to claim 4, wherein the second bracket is provided with a frame connecting plate, a box connecting plate, a second connecting rod and a connecting piece, both ends of the second connecting rod are respectively connected with the frame connecting plate and the box connecting plate through the connecting piece, an upper connecting point of the second connecting rod is connected with the frame connecting plate, and a lower connecting point of the second connecting rod is connected with the box connecting plate; the second connecting rod can rotate along the axis of the connecting piece; the frame connecting plate is connected with the frame, and the upper plane of the frame connecting plate is attached to the lower surface of the frame; the box body connecting plate is connected with the second lifting lug of the battery pack, and is positioned below the frame connecting plate; the included angle between the symmetry line of the second connecting rod through the axis of the connecting piece and the upper plane of the frame connecting plate is beta.
6. The battery pack support apparatus of claim 5, wherein the included angle β is an acute angle and the included angle β is greater than the included angle α.
7. The battery pack supporting apparatus according to claim 1, wherein the third bracket is provided with a frame connecting plate, a case bracket, and a connecting member, the frame connecting plate and the case bracket are connected by the connecting member, and the case bracket is rotatable along an axis of the connecting member; the frame connecting plate is connected with the frame, namely the upper plane of the frame connecting plate is attached to the lower surface of the frame; the box body bracket is connected with a third lifting lug of the battery pack and is positioned below the frame connecting plate; the third lifting lug of the battery pack can move relative to the frame along the axis of the connecting piece.
8. The battery pack supporting apparatus according to claim 1, wherein the fourth bracket is provided with a frame connecting plate, a box connecting plate, a fourth connecting rod and a connecting piece, both ends of the fourth connecting rod are respectively connected with the frame connecting plate and the box connecting plate through the connecting piece, an upper connecting point of the fourth connecting rod is connected with the frame connecting plate, and a lower connecting point of the fourth connecting rod is connected with the box connecting plate; the fourth connecting rod can rotate along the axle center of the connecting piece, and the frame connecting plate is connected with the frame; the box body connecting plate is connected with a fourth lifting lug of the battery pack, and is positioned below the frame connecting plate; the included angle between the symmetry line of the axle center of the connecting piece and the upper plane of the frame connecting plate is gamma.
9. The battery pack supporting apparatus according to claim 1, wherein the fifth bracket is provided with a frame connecting plate, a box connecting plate, a fifth connecting rod and a connecting piece, both ends of the fifth connecting rod are respectively connected with the frame connecting plate and the box connecting plate through the connecting piece, an upper connecting point of the fifth connecting rod is connected with the frame connecting plate, and a lower connecting point of the fifth connecting rod is connected with the box connecting plate; the fifth connecting rod can rotate along the axle center of the connecting piece, and the frame connecting plate is connected with the frame; the box body connecting plate is connected with a fifth lifting lug of the battery pack, and is positioned below the frame connecting plate; the included angle between the symmetry line of the axle center of the connecting piece and the upper plane of the frame connecting plate is epsilon.
10. An electric vehicle, characterized in that it comprises a battery pack supporting device according to any one of claims 1 to 9.
CN202310746752.1A 2023-06-25 2023-06-25 Battery pack supporting device and electric automobile Active CN116494750B (en)

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