CN220604833U - Battery pack and electric vehicle comprising same - Google Patents

Abstract

The utility model provides a battery pack and an electric vehicle comprising the same, wherein the battery pack comprises a frame, at least one battery body and at least one bearing beam arranged in the frame, and the bearing beam is detachably connected with the frame; the frame at least accommodates one battery body, and each bearing beam bears at least one battery body. The battery pack and the electric vehicle comprising the battery pack are characterized in that the upper layer and the lower layer of battery bodies are separated by the bearing beam. The bearing beam and the frame adopt a detachable connection mode, so that the upper and lower layers of battery bodies can be conveniently taken out or put into the frame without disassembling the whole frame, the efficiency is improved, and the battery maintenance operation is convenient. On the other hand, a certain distance is reserved between the upper layer battery body and the lower layer battery body through the bearing beam, so that heat dissipation of the battery body is facilitated.

Description

Battery pack and electric vehicle comprising same

Technical Field

The utility model relates to the technical field of electric vehicles, in particular to a battery pack and an electric vehicle comprising the battery pack.

Background

At present, electric vehicles are increasingly popular with consumers, and in the age of popularization of electric vehicles, the electric vehicle is replaced as one of the feasible methods for solving the problem of continuous voyage of the electric vehicles, has the advantages of convenience and rapidness, and is widely used at present.

The battery pack can further reduce the frequency and the times of battery replacement, and is still one of the factors considered by consumers.

Battery packs for heavy vehicles require a large capacity, and often have multiple battery bodies per battery pack. During use of the battery, the battery body in the battery pack needs to be taken out for replacement or maintenance for various reasons (e.g., aging or battery damage). However, when the battery body in the battery pack needs to be taken out, the frame of the whole battery pack is generally required to be removed, the battery body at the lowest layer can be taken out, the disassembly and assembly are difficult, and the efficiency is low.

Disclosure of Invention

The utility model aims to overcome the defects of difficult disassembly and assembly and low efficiency of a battery pack in the prior art, and provides the battery pack and an electric vehicle comprising the battery pack.

The utility model solves the technical problems by the following technical scheme:

a battery pack for use in an electric vehicle, the battery pack comprising a frame, at least one battery body, and at least one load beam disposed within the frame, the load beam being removably connected to the frame; the frame accommodates at least one battery body, and each bearing beam bears at least one battery body.

In the scheme, the battery pack is provided with the battery bodies at the upper layer and the lower layer at intervals through the bearing beams. The bearing beam and the frame adopt a detachable connection mode, so that the upper and lower layers of battery bodies can be conveniently taken out or put into the frame without disassembling the whole frame, the disassembly and assembly difficulty of the battery pack is reduced, the efficiency is improved, and the battery is convenient to maintain and operate. On the other hand, a certain distance is reserved between the upper layer battery body and the lower layer battery body through the bearing beam, so that heat dissipation of the battery body is facilitated.

Preferably, the bearing beam comprises a first rod and a second rod, and the arrangement directions of the first rod and the second rod are different;

the two ends of the second rod are respectively connected with the first rod, and the first rod is detachably connected with the frame.

In this scheme, first pole and second pole adopt different direction setting for the carrier bar forms the structure of alternate connection, can bear the battery of equidimension not, is favorable to the stationarity of bearing. The first rod and the frame adopt a detachable connection mode, so that the detachable connection of the bearing beam and the frame is realized.

Preferably, the first rod is disposed along a length direction of the battery pack; the second lever is disposed along a width direction of the battery pack.

In this scheme, with first pole along the length direction setting of battery package, and the width direction setting of battery package is followed to the second pole for can utilize the connection of first pole and frame to bear the main weight of battery package in length direction firmly, be favorable to bearing the steadiness.

Preferably, the frame is further provided with a supporting part for supporting the first rod.

In this scheme, through the area of contact of the supporting part increase and the first pole that sets up on the frame, support first pole effectively, improve bearing structure's stability.

Preferably, the support part is detachably connected with the frame, and the position of the support part on the frame in the height direction of the battery pack is adjustable.

In this scheme, the supporting part adopts detachable connected mode with the frame, has realized the detachable connection of carrier bar and frame. The supporting part adopts a structure with adjustable positions on the frame, so that the position of the bearing beam can be flexibly adjusted according to the volume or interval requirement of the battery body, and the assembly requirement of different batteries can be met.

Preferably, the load beam further includes a connection portion, and the connection portion is disposed on the first rod at a position corresponding to the support portion, and the support portion is supported by the connection portion.

In this scheme, through locating the position that connecting portion corresponds supporting part on the first pole to improve the intensity of first pole, support in connecting portion through the supporting part, thereby make the carrier bar obtain stable support.

Preferably, the section of the first rod is rectangular, and the connecting part is an L-shaped plate matched with the first rod.

In this scheme, the cross-section of first pole adopts rectangular structure, and connecting portion adopts with first pole assorted L shaped plate for the carrier bar steadily sits on the plane of L shaped plate, for other shape structures, the supporting plane of L shaped plate is bigger, has improved the stability that supports the carrier bar.

Preferably, the frame comprises a vertical rod arranged along the height direction of the battery pack, each supporting part comprises two supporting plates, and the two supporting plates are symmetrically arranged on two sides of the vertical rod; the support plate includes a protruding portion for supporting the first rod, the protruding portion extending in a horizontal direction to protrude from the vertical rod.

In this scheme, set up in montant both sides through two backup pad symmetries to through fastener fixed support plate, make supporting part can be with the mode of pressing from both sides tight reliably fixed on the montant, can loosen the fastener again in order to adjust the position of two backup pads, realize the nimble regulation of supporting part's position on the frame. The protruding part extends in the horizontal direction to protrude from the vertical rod, so that the protruded part can firmly support the first rod.

Preferably, the frame is further provided with a fixing portion, the fixing portion is disposed at least one end of the first rod, and the fixing portion is detachably connected with the first rod through a fixing piece.

In this scheme, through the fixed part of above-mentioned structure to and fixed part and first pole can dismantle the connection for at the in-process that the vehicle was gone, fixed part can prevent that the carrier beam from taking place to rock or displacement etc. be favorable to the firm of carrier beam.

Preferably, the frame at least comprises an upper frame and a lower frame, and at least one battery body is accommodated in the lower frame;

the bearing beam is arranged between the upper layer frame and the lower layer frame;

or, the load beam is disposed in the upper frame.

In the scheme, the lower part of the battery pack is easily damaged by ground objects in the actual running process of the electric vehicle, and the battery pack is more required to be protected, so that the battery body is limited to be arranged in the lower frame; the bearing beam can be arranged between the upper frame and the lower frame or in the upper frame according to the space requirement of the upper frame and the lower frame, so that the adaptability is more flexible.

Preferably, the cross-sectional dimension of the battery body in the lower frame is not greater than the cross-sectional dimension of the load beam in a direction perpendicular to the height direction of the battery pack.

In this scheme, adopt foretell cross-section size relation for when dismantling and get rid of the carrier bar, the battery body of lower floor can not be blocked by other parts in the frame, makes the battery body of lower floor take out or put into easily, has improved the dismouting efficiency of battery package.

Preferably, the battery pack further includes a locking member provided at a side and/or top of the frame.

In this solution, the battery pack is locked to the vehicle by the locking member. The locking piece is arranged at the side part and/or the top part of the frame, and is suitable for installing the locking seat on different structures at different positions on the vehicle.

Preferably, the upper frame and the lower frame have the same cross-sectional size in a direction perpendicular to the height direction of the battery pack;

the bearing beam is arranged between the upper layer frame and the lower layer frame;

the battery body on the bearing beam is partially or completely positioned in the upper layer frame;

the locking piece is arranged at the side part and/or the top of the upper layer frame, or the locking piece is arranged at the side part of the lower layer frame.

In this scheme, when the cross-sectional dimensions of upper frame and lower frame are the same in the direction perpendicular to the height direction of battery package, upper and lower frame can be the frame of integration, easy processing and with the installation arrangement of vehicle. Because the upper layer battery body is supported by the bearing beams, the upper layer frame is not limited to completely accommodating the upper layer battery body, namely, the size of the upper layer battery body can be as large as or larger than the accommodating space of the upper layer frame, so that a battery with larger capacity can be selected, or the upper layer frame is reduced to reduce the weight and the cost of the battery pack. When the upper layer frame and the lower layer frame are the same in size, the locking piece can be arranged on the side part and/or the top of the upper layer frame or on the side part of the lower layer frame so as to adapt to locking mechanisms of different positions or different structures on a vehicle.

Preferably, the cross-sectional dimension of the upper frame is greater than the cross-sectional dimension of the lower frame in a direction perpendicular to the height direction of the battery pack;

the bearing beam is arranged between the upper layer frame and the lower layer frame, and the battery body on the bearing beam is partially or completely positioned in the upper layer frame;

or, the bearing beam is arranged in the upper layer frame, the upper end face of the bearing beam is lower than the upper end face of the upper layer frame, and the battery body on the bearing beam is partially or completely positioned in the upper layer frame;

or, the bearing beam is arranged in the upper layer frame, the upper end face of the bearing beam is flush with the upper end face of the upper layer frame, and the battery body on the bearing beam is positioned on the upper layer frame;

the locking piece is arranged at the side part of the lower layer frame.

In this scheme, when the cross-sectional dimension of the upper frame is greater than that of the lower frame in the direction perpendicular to the height direction of the battery pack, the frames form a structure form of which the upper part is large and the lower part is small.

The upper layer frame is not limited to completely accommodating the upper layer battery body, namely the size of the upper layer battery body can be as large as or larger than the accommodating space of the upper layer frame, so that a battery with larger capacity can be selected, or the upper layer frame is reduced to reduce the weight and cost of the battery pack.

But when the carrier beam sets up in the upper frame, and the up end of carrier beam is set up under the circumstances of being parallel and level with the up end of upper frame, guarantee carrier beam minimum installation space in the upper frame, at this moment, the battery body on the carrier beam also lies in the upper frame simultaneously, and the battery body on upper layer is not surrounded by the upper frame to the weight and the cost of maximum reduction battery package.

When the size of the upper frame is larger than that of the lower frame, the lower layer of the frame forms a concave space relative to the upper layer, in the structural form, the locking piece is arranged on the side part of the lower frame, the locking piece is arranged by utilizing the concave space of the lower layer, the volume of the battery pack is not required to be integrally reduced, the locking piece is prevented from affecting the capacity of the battery pack, the cruising of the electric vehicle is improved, and the locking mode that the battery pack moves from top to bottom can be adapted.

Preferably, the cross-sectional dimension of the upper frame is smaller than the cross-sectional dimension of the lower frame in a direction perpendicular to the height direction of the battery pack;

the bearing beam is arranged between the upper layer frame and the lower layer frame, or is arranged in the upper layer frame;

the battery body on the bearing beam is partially or completely positioned in the upper layer frame;

The locking piece is arranged on the side part of the upper layer frame, or the locking piece is arranged on the top of the lower layer frame.

In this scheme, when the cross-sectional dimension of upper frame is smaller than lower frame in the direction perpendicular to the height direction of battery package, the frame forms the big end down's form of structure, and lower frame forms the boss that exceeds upper frame.

The upper layer frame is not limited to completely accommodating the upper layer battery body, namely, the size of the upper layer battery body can be as large as or larger than the accommodating space of the upper layer frame, so that a battery with larger capacity can be selected, or the upper layer frame can be reduced to reduce the weight and cost of the battery pack.

When the size of the upper frame is smaller than that of the lower frame, the upper layer of the frame forms a concave space relative to the lower layer, in the structural form, the locking piece is arranged on the side part of the upper frame or on the top of the lower frame, the locking piece is arranged by utilizing the concave space of the upper layer, the volume of the battery pack is not required to be integrally reduced, the capacity of the battery pack is prevented from being influenced by the locking piece, the cruising time of an electric vehicle is improved, and the locking mode that the battery pack moves from bottom to top can be adapted.

Preferably, the battery pack further comprises a limiting part, and the limiting part is arranged on at least one side of the frame along the installation direction of the battery pack; the electric vehicle is provided with a matching part, and the limiting part is matched with the matching part so as to limit the battery pack.

In the scheme, the limiting part is arranged on at least one side of the frame along the installation direction of the battery pack, so that the limit of the battery pack in the installation direction is formed; through the cooperation of spacing portion and cooperation portion for after the battery package is installed in place, no longer remove, thereby restricted the relative position of battery package and electric vehicle in the installation direction, make the battery package be fixed on electric vehicle steadily.

Preferably, the limiting part comprises a limiting shaft, a limiting hole is formed in the matching part, and the limiting shaft can extend into the limiting hole so that the limiting part is matched with the matching part.

In this scheme, through stretching into spacing hole with spacing axle, shaft hole cooperation has restricted the removal of battery package in different directions for the battery package is fixed on electric vehicle more steadily.

Preferably, the limiting hole is a waist-shaped hole, and the length direction of the waist-shaped hole is perpendicular to the mounting direction of the battery pack.

In this scheme, through the limited activity space in the waist type hole to the length direction in waist type hole is perpendicular to battery package installation direction, makes spacing axle stretch into behind the waist type hole, has certain activity space in perpendicular to battery package installation direction, and the position in waist type hole is easily aimed at to spacing axle when making the battery package installation.

Preferably, the width of the waist-shaped hole is not smaller than the diameter of the limiting shaft; and/or the end part of the limiting shaft matched with the waist-shaped hole is provided with a guide surface.

In this scheme, through setting up the width of waist type hole and being not less than the diameter of spacing axle for spacing axle has certain activity space in waist type hole, has reduced the battery package when installing, and the degree of difficulty that spacing axle and waist type hole position align. And/or, the end part of the limiting shaft matched with the waist-shaped hole is provided with a guide surface, so that the limiting shaft is easy to enter the waist-shaped hole under the guiding action of the guide surface.

An electric vehicle comprising a battery pack as described above.

In the scheme, the electric vehicle adopts the battery pack, and the battery pack is used for spacing the upper layer and the lower layer of battery bodies through the bearing beams. The bearing beam and the frame adopt a detachable connection mode, so that the upper and lower layers of battery bodies can be conveniently taken out or put into the frame without disassembling the whole frame, the disassembly and assembly difficulty of the battery pack is reduced, the efficiency is improved, and the battery is convenient to maintain and operate. On the other hand, a certain distance is reserved between the upper layer battery body and the lower layer battery body through the bearing beam, so that heat dissipation of the battery body is facilitated.

The utility model has the positive progress effects that: the battery pack and the electric vehicle comprising the battery pack are characterized in that the upper layer and the lower layer of battery bodies are separated by the bearing beam. The bearing beam and the frame adopt a detachable connection mode, so that the upper and lower layers of battery bodies can be conveniently taken out or put into the frame without disassembling the whole frame, the disassembly and assembly difficulty of the battery pack is reduced, the efficiency is improved, and the battery is convenient to maintain and operate. On the other hand, a certain distance is reserved between the upper layer battery body and the lower layer battery body through the bearing beam, so that heat dissipation of the battery body is facilitated.

Drawings

Fig. 1 is a schematic structural view of an electric vehicle according to embodiment 1 of the present utility model.

Fig. 2a is a schematic structural view of a battery pack according to embodiment 1 of the present utility model.

Fig. 2b is a schematic view of the battery pack according to embodiment 1 of the present utility model with the battery body removed.

Fig. 2c is a schematic view of the battery pack according to embodiment 1 of the present utility model from another angle after the battery body is removed.

Fig. 3a is a schematic structural diagram of a load beam according to embodiment 1 of the present utility model.

Fig. 3b is a schematic structural diagram of a connection portion according to embodiment 1 of the present utility model.

Fig. 3c is a schematic structural view of the supporting portion of embodiment 1 of the present utility model.

Fig. 4a is a schematic diagram illustrating an assembly structure of a limiting portion and a mating portion according to embodiment 1 of the present utility model.

Fig. 4b is a schematic structural diagram of a limiting portion in embodiment 1 of the present utility model.

Fig. 4c is a schematic structural view of a locking member according to embodiment 1 of the present utility model.

Fig. 5a is a schematic structural view of an electric vehicle according to embodiment 2 of the present utility model.

Fig. 5b is a schematic structural view of a battery pack according to embodiment 2 of the present utility model.

Fig. 5c is a schematic view of the battery pack according to embodiment 2 of the present utility model with the battery body removed.

Fig. 6a is a schematic structural view of an electric vehicle according to embodiment 3 of the present utility model.

Fig. 6b is a schematic structural view of a battery pack according to embodiment 3 of the present utility model.

Fig. 6c is a schematic view showing the structure of the battery pack according to embodiment 3 of the present utility model after the battery body is removed.

Fig. 7a is a schematic structural view of a battery pack according to embodiment 4 of the present utility model.

Fig. 7b is a schematic view of the structure of the battery pack according to embodiment 4 of the present utility model with the battery body removed.

Reference numerals illustrate:

an electric vehicle 1, a longitudinal beam 3, a cross beam 4, a battery pack 2, a battery body 21,

the frame 22, the upper frame 221, the lower frame 222, the boss 223,

the supporting portion 23, the supporting plate 231, the circular hole 232, the protruding portion 233,

the connecting part 24, the connecting hole 241, the vertical rod 25, the fixing part 26,

the locking member 27, the lock shaft 271,

The load beam 28, the first lever 281, the second lever 282,

the limiting portion 29, the limiting shaft 291, the guide surface 292,

the engagement portion 30, the limiting aperture 301,

the length direction A of the battery pack, the width direction B of the battery pack and the height direction C of the battery pack.

Detailed Description

The present utility model will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown.

Example 1

As shown in fig. 1 and 2a to 2c, the present embodiment provides a battery pack 2 for use in an electric vehicle, the electric vehicle 1 including a vehicle end bracket including two side members 3 and two cross members 4, the battery pack 2 being mounted between the outer sides of the two side members 3 and the front and rear cross members 4.

The battery pack 2 comprises a frame 22, two battery bodies 21 and a bearing beam 28 arranged in the frame 22, wherein the bearing beam 28 is detachably connected with the frame 22; wherein, two battery bodies 21 are accommodated in the frame 22, which are respectively an upper layer battery body and a lower layer battery body, the upper layer battery body 21 is borne on the bearing beam 28, and the lower layer battery body 21 is arranged below the bearing beam 28 (namely, the bottom accommodating space of the frame).

The battery body 21 is a battery cell module inside the battery pack, and the upper and lower battery bodies 21 may be the same or different. The battery pack 2 includes upper and lower battery bodies 21 separated by a carrier beam 28. The bearing beam 28 and the frame 22 adopt a detachable connection mode, so that the upper and lower layers of battery bodies 21 can be conveniently taken out or put into the frame 22 without disassembling the whole frame 22, the disassembly difficulty of the battery pack 2 is reduced, the efficiency is improved, and the battery maintenance operation is convenient. On the other hand, a certain distance is formed between the upper and lower battery bodies 21 through the bearing beams 28, which is beneficial to heat dissipation of the battery bodies 21.

In other embodiments, the number of the battery bodies 21 in the battery pack 2 can be adjusted according to the requirements according to the capacity and the size of the battery pack 2 required by the electric vehicle, and accordingly, the number of the load beams 28 can be adjusted according to the number of the battery bodies 21. Depending on the type of battery, two or more battery bodies 21 may be provided on each carrier beam 28.

Specifically, as shown in fig. 3a, the load beam 28 includes two first rods 281 and a plurality of second rods 282, where the first rods 281 and the second rods 282 are steel pipes with rectangular cross sections, and the pipe diameters are identical. Wherein two first bars 281 are arranged in the length direction a of the battery pack 2, and each second bar 282 is disposed in the width direction B of the battery pack 2, being laterally interposed between the two first bars 281, which are staggered in a perpendicular relationship with each other in the shape of a stretcher, and thus, the load-bearing beam 28 is also referred to as a stretcher beam. Both ends of the second lever 282 are welded to the first lever 281, respectively, and the first lever 281 is detachably connected to the frame 22.

The first lever 281 is disposed along the length direction a of the battery pack 2, so that the connection of the first lever 281 and the frame 22 can be utilized to stably carry the main weight of the battery pack 2 in the length direction a, which is advantageous for the stability of carrying. The first rod 281 and the second rod 282 are arranged in such a vertical direction, so that the bearing beams 28 form a staggered connection structure, and are connected through a welding process, so that the high-strength stretcher beams are made, the batteries with different sizes can be borne, and the bearing stability is facilitated. The first lever 281 is detachably connected with the frame 22, so that the bearing beam 28 is detachably connected with the frame 22. In other embodiments, the number of the first rods 281 and the second rods 282 may be adjusted according to the size of the battery pack 2 or the connection structure, and the arrangement direction may be set in different directions according to the needs.

As shown in fig. 2b and 3c, the frame is further provided with a supporting portion 23, and the supporting portion 23 is used for supporting the first lever 281. The supporting portion 23 increases the contact area with the first lever 281, thereby effectively supporting the first lever 281 and improving the stability of the bearing structure. The support 23 is detachably connected to the frame 22, whereby the detachable connection of the carrier beam 28 to the frame 22 is achieved. And the position of the supporting part 23 on the frame 22 along the height direction C of the battery pack 2 is adjustable, so that the position of the bearing beam 28 can be flexibly adjusted according to the volume or interval requirement of the battery body 21, and the battery pack is suitable for different battery assembly requirements.

As shown in fig. 2b and 3b, the load beam 28 further includes a connection portion 24, where the connection portion 24 is disposed on the first lever 281 corresponding to the support portion 23, so as to improve the strength of the first lever 281, and is supported by the connection portion 24 through the support portion 23, so that the load beam 28 is stably supported.

Specifically, the connection portion 24 is an L-shaped plate made of steel, and a half of the plate surface of the L-shaped plate is a flat plate along the length direction a of the battery pack 2, which is matched with one flat surface (i.e., one surface of a rectangular steel pipe) of the first lever 281. Each first lever 281 is stably seated on the plane of the plurality of L-shaped plates, two connection holes 241 are formed in the L-shaped plates, the L-shaped plates are connected with the first levers through the connection holes 241 by two fasteners, and the load beam 28 is more firmly fastened to the connection portion 24.

As shown in fig. 2b, the frame 22 includes a plurality of vertical rods 25 disposed along the height direction C of the battery pack 2, each supporting portion 23 includes two supporting plates 231, each supporting plate 231 is specifically a steel plate with a customized shape and a certain thickness, two round holes 232 are formed in each plate, the two supporting plates 231 are symmetrically disposed on two sides of the vertical rod 25, and the two supporting plates 231 can pass through the two round holes 232 through fasteners to be fixed on the vertical rod 25. The support plate 231 includes a protrusion 233 for supporting the connection portion 24, and the protrusion 233 extends in the horizontal direction to protrude from the vertical bar 25. The lower protruding portion 233 is longer to be clamped into the bottom surface of the connecting portion 24, so that the supporting plate 231 has a larger stress surface and can firmly support the connecting portion 24, the upper protruding portion 233 is shorter, and the upper protruding portion 233 and the lower protruding portion 233 form a rectangular bayonet for clamping the connecting portion 24.

In such a structure, the two support plates 231 are symmetrically arranged at two sides of the vertical rod 25, and the support plates 231 are fixed by the fasteners, so that the support part 23 can be reliably fixed on the vertical rod 25 in a clamping manner, and the fasteners can be loosened to adjust the positions of the two support plates 231, thereby realizing flexible adjustment of the positions of the support part 23 on the frame 22. The protruding portion 233 extends in the horizontal direction to protrude from the vertical rod 25, so that the connecting portion 24 supported by the protruding portion 233 is located inside the vertical rod 25, and the position of the load beam 28 is limited inside the frame 22 surrounded by the plurality of vertical rods 25.

As shown in fig. 2b, the frame 22 is further connected with a fixing portion 26, and the fixing portion 26 is specifically a small steel section. The fixing portions 26 are provided at both ends of the first lever 281, distributed at four corners of the load beam 28. The fixing portion 26 is provided with a connecting hole, and the fixing portion 26 is detachably connected with the first rod 281 through a fixing piece, specifically a bolt, penetrating through the connecting hole. Through the fixed portion 26 of the above structure, and the fixed portion 26 is detachably connected with the first lever 281, the fixed portion 26 can prevent the carrier beam 28 from shaking or shifting during the running process of the vehicle, which is beneficial to the stability of the carrier beam 28.

With respect to the above structures of the connection portion 24, the support portion 23, and the fixing portion 26, in other embodiments, the carrier beam 28 may not be fixed to the connection portion 24, but may be limited to the frame by other structures of the frame; the first lever 281 may be directly caught or supported by the protruding portion 233 of the supporting portion 23 without the connecting portion 24, but the supporting plane of the l-shaped plate is larger by adopting the connecting portion 24 of the present embodiment, so that the stability of supporting the load beam 28 can be improved.

In other embodiments, the fixing portion 26 may be omitted, and the carrier beam may be limited in the frame by other structures of the frame, or the supporting portion 23, the connecting portion 24 and the fixing portion 26 may take other structural forms capable of achieving supporting, connecting and fixing effects according to the specific structure of the battery pack 2.

As shown in fig. 2c and 4a, 4b, the battery pack 2 further includes a stopper 29, the stopper 29 being provided at one side of the frame in the mounting direction of the battery pack 2; the side member 3 of the electric vehicle 1 is provided with a fitting portion 30, and the stopper portion 29 is fitted to the fitting portion 30 to restrict the battery pack 2. The limiting part 29 is arranged on one side of the frame 22 along the installation direction of the battery pack 2, so that the limitation of the battery pack 2 in the installation direction is formed; by the engagement of the stopper portion 29 and the engaging portion 30, the battery pack 2 is not moved after being mounted in place, so that the relative position of the battery pack 2 and the electric vehicle 1 is restricted in the mounting direction, and the battery pack 2 is stably fixed to the electric vehicle 1.

Specifically, as shown in fig. 4a and 4b, the limiting portion 29 includes a plurality of limiting shafts 291, the matching portion 30 is provided with a limiting hole 301, and the limiting shafts 291 can extend into the limiting hole 301, so that the limiting portion 29 is matched with the matching portion 30. By extending the limit shaft 291 into the limit hole 301, the shaft hole engagement restricts movement of the battery pack 2 in different directions, so that the battery pack 2 is more stably fixed to the electric vehicle 1. In other embodiments, depending on the specific structure of the electric vehicle 1 and the need for restraining the battery pack 2, the restraining portions 29 may be provided on both sides of the frame.

As shown in fig. 4a, the limiting hole 301 is a waist-shaped hole, and the length direction of the waist-shaped hole is perpendicular to the mounting direction of the battery pack 2. Through the limited movable space in the waist-shaped hole, and the length direction of the waist-shaped hole is perpendicular to the installation direction of the battery pack 2, a certain movable space is formed in the direction perpendicular to the installation direction of the battery pack 2 after the limiting shaft 291 stretches into the waist-shaped hole, so that the limiting shaft 291 is easy to align with the position of the waist-shaped hole when the battery pack 2 is installed.

Wherein, the width of the waist-shaped hole is not smaller than the diameter of the limit shaft 291; the end of the limiting shaft 291 that mates with the kidney-shaped hole is provided with a guide surface 292. By setting the width of the waist-shaped hole to be not smaller than the diameter of the limiting shaft 291, a certain movable space is reserved in the waist-shaped hole by the limiting shaft 291, and the difficulty of aligning the limiting shaft 291 with the waist-shaped hole during installation of the battery pack 2 is reduced. By providing the guide surface 292 at the end of the limit shaft 291 that is engaged with the waist-shaped hole, the limit shaft 291 is easily inserted into the waist-shaped hole under the guide action of the guide surface 292.

In the present embodiment, the frame 22 is divided into an upper frame 221 and a lower frame 222 with the carrier beam 28 as a partition, as shown in fig. 2b, and the carrier beam 28 is disposed between the upper frame 221 and the lower frame 222. The upper frame 221 accommodates therein a battery body 21, the battery body 21 being seated on the carrier beam 28; the lower frame 222 accommodates another battery body 21 therein. In such a frame 22, the upper frame 221 and the lower frame 222 have the same cross-sectional dimensions in the direction perpendicular to the height direction C of the battery pack 2, that is, the upper and lower frames 222 have the same size, and the frame 22 may be constructed in a single body.

By disposing the carrier beam 28 between the upper and lower frames, the upper and lower battery bodies 21 are spaced apart, and heat dissipation of the battery bodies 21 is facilitated. The upper and lower frames are integrated, and are easy to process and install and arrange with the vehicle.

In the present embodiment, the battery bodies 21 on the carrier beams 28 are all located in the upper frame 221, but in other embodiments, since the upper battery bodies 21 are supported by the carrier beams 28, the upper frame 221 is not limited to completely accommodating the upper battery bodies 21, and the height of the upper frame 221 can be adjusted accordingly as required, and if the height of the upper frame 221 is low and the height of the battery bodies 21 is high, the battery bodies 21 on the carrier beams 28 are only partially located in the upper frame 221. Since the top of the upper frame 221 is open, the size of the upper battery body 21 is not limited to the volume size of the upper frame 221, i.e., the size of the upper battery body 21 may be as large as or larger than the receiving space of the upper frame 221, so that a battery having a larger capacity may be selected or the upper frame 221 may be reduced to reduce the weight and cost of the battery pack 2.

In other embodiments, the upper and lower frames may be of different sizes, but in order to facilitate removal of the battery body 21 from the lower frame 222, in other preferred embodiments, the cross-sectional dimension of the battery body 21 in the lower frame 222 is not greater than the cross-sectional dimension of the carrier beam 28 in the direction perpendicular to the height direction C of the battery pack 2. So that when the bearing beam 28 is removed, the lower battery body 21 is not blocked by other components in the frame 22, so that the lower battery body 21 is easy to take out or put in, and the disassembly and assembly efficiency of the battery pack is improved.

As shown in fig. 2b and 4c, the battery pack 2 further includes a locking member 27, and the locking member 27 includes a lock shaft 271. The upper frame 221 may be provided with a plurality of locking members 27 on rims of both front and rear side portions thereof, and a head end bracket of a vehicle is provided with a locking seat (not shown) on the cross member 4 corresponding to the locking members 27. During the process of installing the battery pack 2, the whole battery pack 2 moves from bottom to top, the lock shaft 271 moves along with the rising, and then stretches into and locks in the lock groove of the lock seat, so that the battery pack 2 is locked on the vehicle through the cooperation of the locking piece 27 and the lock seat.

In this embodiment, the locking members 27 may be disposed on the side frames of the front and rear sides of the upper frame 221 to better adapt to the installation height of the battery pack 2 and the locking manner of the battery pack 2 moving from bottom to top, but in other embodiments, depending on the installation position of the locking seat on the end bracket, the locking members 27 may also be disposed on the top of the upper frame 221 or on the side of the lower frame 222, etc. to adapt to the locking seat at different positions or with different structural members on the vehicle. Compared with the situation that the upper and lower frames are different in size, the embodiment adopts an integrated frame structure, so that the locking pieces 27 can be installed at more selectable positions.

Example 2

As shown in fig. 5a to 5c, the present embodiment provides another battery pack 2, and the battery pack 2 of the present embodiment is similar in structure to the battery pack 2 of embodiment 1, except that:

in the battery pack 2, the cross-sectional dimension of the upper frame 221 is larger than the cross-sectional dimension of the lower frame 222 in the direction perpendicular to the height direction C of the battery pack 2, and the frames form a structure with a large upper part and a small lower part.

The carrier beam 28 is disposed in the upper frame 221, and the upper end surface of the carrier beam 28 is flush with the upper end surface of the upper frame 221, so that the upper battery body 21 on the carrier beam 28 is also disposed on the upper frame 221, and the lower battery body 21 is disposed in the lower frame 222. Here, the load beam 28 is directly disposed on the surface of the lower cell body 21, supported by the case of the lower cell body 21, and therefore, the connection part 24, the support part 23, and the fixing part 26 as in embodiment 1 are not required.

In such a structure of the battery pack 2, the carrier beam 28 is disposed in the upper frame 221, and the size of the carrier beam 28 is not limited to the size of the lower frame 222, so that the lower battery body 21 can be easily taken out or put in. The upper end surface of the carrier beam 28 is set flush with the upper end surface of the upper frame 221, so that the minimum installation space of the carrier beam 28 in the upper frame 221 is ensured, and at this time, the battery bodies 21 on the carrier beam 28 are also located on the upper frame 221 at the same time, and the upper battery bodies 21 are not surrounded by the upper frame 221, so that the weight and cost of the battery pack 2 are reduced to the greatest extent.

In the present embodiment, the locking members 27 are provided at the side portions of the lower frame 222, and the specific structure is that the lower frame 222 may be provided with a plurality of locking members 27 at both front and rear end side portions, each locking member 27 including a lock shaft 271, and a vehicle end bracket of a vehicle is mounted with a lock base (not shown) on the cross member 4 corresponding to the locking member 27. During the process of installing the battery pack 2, the whole battery pack 2 moves from top to bottom, the lock shaft 271 moves downwards, and then stretches into and is locked in the lock groove of the lock seat, so that the battery pack 2 is locked on the vehicle through the cooperation of the locking piece 27 and the lock seat.

Because the frame 22 is big end down, the front and back end of lower floor frame 222 forms a indent space for upper floor frame 221, in such a structural style, with locking piece 27 setting in the lateral part of lower floor frame 222, utilize the indent space in lower floor to settle locking piece 27, and need not whole reduce the volume of battery package 2, avoid locking piece 27 to influence the capacity of battery package 2 to improve electric vehicle's continuation of journey, and can adapt to the locking mode that battery package 2 moved from top to bottom.

For this frame type of the battery pack 2, which is large in the top and small in the bottom, in other embodiments, if the upper frame 221 extends upward to a high height, the upper end surface of the load beam 28 is lower than the upper end surface of the upper frame 221, and the load beam 28 is still disposed in the upper frame 221. In this case, the battery body 21 on the carrier beam 28 may be partially or entirely located in the upper frame 221 (if the height of the upper frame 221 extending upward is increased, the upper battery body 21 is entirely located in the upper frame 221, otherwise, the upper battery body 21 is only partially located in the upper frame 221). The upper end surface of the carrier beam 28 is arranged lower than the upper end surface of the upper frame 221, so that the battery body 21 on the carrier beam 28 can be blocked by the end surface of the upper frame 221 without displacement.

In other embodiments, the carrier beam 28 may also be disposed between the upper frame 221 and the lower frame 222 (e.g., when the overall frame is relatively large and the battery body 21 is relatively small), and the battery body 21 on the carrier beam 28 may be partially or entirely located in the upper frame 221 (if the upper frame 221 extends upward to a high height, the upper battery body 21 may be entirely located in the upper frame 221, or otherwise, the upper battery body 21 may be only partially located in the upper frame 221), and the upper frame 221 is not limited to completely accommodate the upper battery body 21, i.e., the size of the upper battery body 21 may be as large as or larger than the accommodation space of the upper frame 221, so that a larger capacity battery may be selected, or the upper frame 221 may be reduced to reduce the weight and cost of the battery pack 2.

Example 3

As shown in fig. 6a to 6c, the present embodiment provides another battery pack 2, and the battery pack 2 of the present embodiment is similar in structure to the battery pack 2 of embodiment 1, except that:

in the battery pack 2, in a direction perpendicular to the height direction C of the battery pack 2, the cross-sectional dimension of the upper frame 221 is smaller than the cross-sectional dimension of the lower frame 222, the frame 22 is formed in a structure having a small upper part and a large lower part, and the front and rear ends of the lower frame 222 are formed with bosses 223 exceeding the length of the upper frame 221.

A carrier beam 28 (not shown) is provided in the upper frame 221, a portion of the battery body 21 on the carrier beam 28 is located in the upper frame 221, and a locking member 27 is provided at a side of the upper frame 221. The upper frame 221 may be provided with a plurality of three locking members 27 on the side portions of the front and rear ends, each locking member 27 including a lock shaft 271, and a vehicle end bracket of a vehicle is provided with a lock base (not shown) on the cross member 4 corresponding to the locking member 27. During the process of installing the battery pack 2, the whole battery pack 2 moves from bottom to top, the lock shaft 271 moves upward, and then stretches into and locks in the lock groove of the lock base, so that the battery pack 2 is locked on the vehicle through the cooperation of the locking piece 27 and the lock base.

Because the frame 22 is small in top and large in bottom, the front end and the rear end of the upper frame 221 form a concave space relative to the lower frame 222, in such a structural form, the locking piece 27 is arranged at the side part of the upper frame 221, the locking piece 27 is arranged by utilizing the concave space of the upper layer, the volume of the battery pack is not required to be integrally reduced, the locking piece 27 is prevented from influencing the capacity of the battery pack, the cruising time of the electric vehicle is improved, and the locking mode of moving the battery pack 2 from bottom to top can be adapted.

For such a frame type of the battery pack 2 with a large top and a large bottom, in other embodiments, the carrier beams 28 may be disposed between the upper and lower frames 222 to accommodate the installation requirements of the battery bodies 21 with different sizes. In this case, if the upper frame 221 is extended upward, the battery body 21 on the carrier beam 28 may be entirely located in the upper frame 221. Therefore, the height of the upper frame 221 may be adjusted as needed, and the upper frame 221 is not limited to completely accommodating the upper battery body 21, i.e., the size of the upper battery body 21 may be as large as or larger than the accommodating space of the upper frame 221, so that a battery having a larger capacity may be selected or the upper frame 221 may be reduced to reduce the weight and cost of the battery pack 2.

Example 4

As shown in fig. 7a to 7b, the present embodiment provides another battery pack 2, and the battery pack 2 of the present embodiment is similar in structure to the battery pack 2 of embodiment 3, except that:

the locking member 27 is provided on top of the lower frame 222, i.e., the locking member 27 is mounted using the surface of the boss 223 of the lower frame 222. The specific structure is that the lower frame 222 can be provided with a plurality of locking pieces 27 on the top surface of a boss 223 at the front and rear ends, and each locking piece 27 comprises a locking shaft 271; the end bracket of the vehicle is provided with a lock seat (not shown) on the cross member 4 corresponding to the lock piece 27, the lock seat is specifically installed on the inner area of the cross member 4 in the thickness direction, not on the side surface, so that when the battery pack 2 is installed, the battery pack 2 moves from bottom to top as a whole, the lock shaft 271 moves upward against the lock groove of the lock seat, and then is positively caught and locked in the lock groove of the lock seat, instead of extending into the lock groove from the side surface to complete the locking. In this embodiment, the locking member 27 is disposed at the top of the lower frame 222, and the locking member 27 can be disposed in the upper concave space, so that the volume of the battery pack is not required to be reduced, the locking member 27 is prevented from affecting the capacity of the battery pack, the cruising time of the electric vehicle is increased, and the locking mode of the battery pack 2 moving from bottom to top can be adapted.

Example 5

The present embodiment provides an electric vehicle 1 including a vehicle end bracket including two side members 3 and two cross members 4. The electric vehicle further includes a battery pack 2 as in any one of embodiments 1 to 4. The number of the battery packs 2 can be two, and the battery packs are symmetrically distributed on the outer sides of the two longitudinal beams 3. The locking members 27 on the battery pack 2 cooperate with the locking seats on the front and rear cross members 4 to lock the battery pack 2 between the front and rear cross members 4. The electric vehicle employs the above-described battery pack 2, and the battery pack 2 separates the upper and lower battery bodies 21 by the carrier beams 28. The carrier beam 28 and the frame adopt a detachable connection mode, so that the upper and lower layers of battery bodies 21 can be conveniently taken out or put into the frame 22 without disassembling the whole frame 22, the disassembly difficulty of the battery pack 2 is reduced, the efficiency is improved, and the battery maintenance operation is convenient. On the other hand, a certain distance is formed between the upper and lower battery bodies 21 through the bearing beams 28, which is beneficial to heat dissipation of the battery bodies 21.

It will be appreciated that in other alternative embodiments, the end support of the electric vehicle 1 may have other structures, the number of the battery packs 2 may be one or more, and the arrangement and locking manners of the battery packs 2 on the electric vehicle 1 may be determined according to the requirements.

While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the utility model, but such changes and modifications fall within the scope of the utility model.

Claims (18)

1. A battery pack for use in an electric vehicle, the battery pack comprising a frame, at least one battery body, and at least one load beam disposed within the frame, the load beam being removably connected to the frame; wherein the frame accommodates at least one battery body, and each bearing beam bears at least one battery body;

the frame at least comprises an upper layer frame and a lower layer frame, wherein at least one battery body is accommodated in the lower layer frame;

the bearing beam is arranged between the upper layer frame and the lower layer frame; or, the bearing beam is arranged in the upper layer frame;

the battery pack further comprises a locking piece, wherein the locking piece is arranged at the side part and/or the top part of the frame;

The locking piece comprises a lock shaft, and the lock shaft is matched with a lock seat on a vehicle end bracket of the vehicle so as to fix the battery pack on the vehicle.

2. The battery pack of claim 1, wherein the load beam comprises a first bar and a second bar, the first bar and the second bar being disposed in different directions;

the two ends of the second rod are respectively connected with the first rod, and the first rod is detachably connected with the frame.

3. The battery pack of claim 2, wherein the first bar is disposed along a length of the battery pack; the second lever is disposed along a width direction of the battery pack.

4. The battery pack according to claim 2, wherein the frame is further provided with a support portion for supporting the first lever.

5. The battery pack of claim 4, wherein the support is detachably connected to the frame, and the position of the support on the frame in the height direction of the battery pack is adjustable.

6. The battery pack of claim 4, wherein the carrier bar further comprises a connection portion provided on the first bar at a position corresponding to the support portion, the support portion being supported by the connection portion.

7. The battery pack of claim 6, wherein the first rod has a rectangular cross section and the connecting portion is an L-shaped plate that mates with the first rod.

8. The battery pack according to claim 5, wherein the frame comprises a vertical bar disposed along a height direction of the battery pack, each of the support parts comprises two support plates symmetrically disposed at both sides of the vertical bar; the support plate includes a protruding portion for supporting the first rod, the protruding portion extending in a horizontal direction to protrude from the vertical rod.

9. The battery pack of claim 2, wherein the frame is further provided with a fixing portion provided at least one end of the first lever, the fixing portion being detachably linked with the first lever by a fixing member.

10. The battery pack according to claim 1, wherein a cross-sectional dimension of the battery body in the lower frame is not greater than a cross-sectional dimension of the load beam in a direction perpendicular to a height direction of the battery pack.

11. The battery pack according to claim 1, wherein the upper frame and the lower frame have the same cross-sectional dimensions in a direction perpendicular to a height direction of the battery pack;

The bearing beam is arranged between the upper layer frame and the lower layer frame;

the battery body on the bearing beam is partially or completely positioned in the upper layer frame;

the locking piece is arranged at the side part and/or the top of the upper layer frame, or the locking piece is arranged at the side part of the lower layer frame.

12. The battery pack according to claim 1, wherein a cross-sectional dimension of the upper frame is larger than a cross-sectional dimension of the lower frame in a direction perpendicular to a height direction of the battery pack;

the bearing beam is arranged between the upper layer frame and the lower layer frame, and the battery body on the bearing beam is partially or completely positioned in the upper layer frame;

or, the bearing beam is arranged in the upper layer frame, the upper end face of the bearing beam is lower than the upper end face of the upper layer frame, and the battery body on the bearing beam is partially or completely positioned in the upper layer frame;

or, the bearing beam is arranged in the upper layer frame, the upper end face of the bearing beam is flush with the upper end face of the upper layer frame, and the battery body on the bearing beam is positioned on the upper layer frame;

the locking piece is arranged at the side part of the lower layer frame.

13. The battery pack according to claim 1, wherein a cross-sectional dimension of the upper frame is smaller than a cross-sectional dimension of the lower frame in a direction perpendicular to a height direction of the battery pack;

the bearing beam is arranged between the upper layer frame and the lower layer frame, or is arranged in the upper layer frame;

the battery body on the bearing beam is partially or completely positioned in the upper layer frame;

the locking piece is arranged on the side part of the upper layer frame, or the locking piece is arranged on the top of the lower layer frame.

14. The battery pack according to claim 1, further comprising a limit portion provided on at least one side of the frame in a battery pack mounting direction; the electric vehicle is provided with a matching part, and the limiting part is matched with the matching part so as to limit the battery pack.

15. The battery pack of claim 14, wherein the limit portion includes a limit shaft, the engagement portion has a limit hole formed therein, and the limit shaft is extendable into the limit hole to engage the limit portion with the engagement portion.

16. The battery pack of claim 15, wherein the limiting aperture is a kidney-shaped aperture, a length direction of the kidney-shaped aperture being perpendicular to a battery pack mounting direction.

17. The battery pack of claim 16, wherein the width of the waist-shaped hole is not less than the diameter of the limiting shaft; and/or the end part of the limiting shaft matched with the waist-shaped hole is provided with a guide surface.

18. An electric vehicle comprising the battery pack of any one of claims 1-17.