CN212810450U

CN212810450U - Battery tray, battery package and car

Info

Publication number: CN212810450U
Application number: CN202021401541.2U
Authority: CN
Inventors: 王毅; 苗微; 王俊; 谭晶; 彭青波
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2021-03-26
Anticipated expiration: 2030-07-15

Abstract

The utility model provides a battery tray, battery package and car, battery tray includes bottom plate and a plurality of side wall, and bottom plate and a plurality of side wall are connected and are enclosed and close and form one end open-ended and hold the chamber, hold the chamber and be used for holding battery module, and at least one side wall includes first fitting surface, and the bottom plate includes the diapire, and the dihedral angle that first fitting surface and diapire formed is the obtuse angle. The dihedral angle that first fitting surface and diapire through setting up at least one side wall in the battery tray formed is the obtuse angle, and battery module can slide to suitable position along the fitting surface, even battery tray and battery module all have great size deviation, and battery module still can be through first fitting surface and battery tray assembly, and assembly process is simple to and owing to need not too high manufacturing accuracy, manufacturing cost is also lower.

Description

Battery tray, battery package and car

Technical Field

The utility model belongs to the battery field especially relates to a battery tray, battery package and car.

Background

In present battery package, through set up the end plate in battery module both sides, the end plate passes through the bolt to be connected fixedly with the tray to make battery module and tray relatively fixed. The fixing means needs to design corresponding bulges on the end plate and the tray, and the bulges are punched to be connected through bolts.

In the scheme, the connection and fixation positions of the end plates and the trays are unique, if the size deviation of the battery modules or the trays is overlarge or the position deviation of the holes is overlarge, the holes of the end plates and the holes of the trays are not aligned, and the end plates and the trays cannot be connected through bolts. The scheme is complex and has higher precision requirement, and is not beneficial to the assembly of the battery pack and the reduction of the production cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a battery tray, battery package and car can simplify the assembly and the reduction in production cost of battery package.

For realizing the purpose of the utility model, the utility model provides a following technical scheme:

in a first aspect, the utility model provides a battery tray, battery tray include bottom plate and a plurality of side wall, the bottom plate is with a plurality of the side wall is connected and is enclosed to close and form one end open-ended and hold the chamber, it is used for holding battery module, at least one to hold the chamber the side wall has first fitting surface, the bottom plate includes the diapire, first fitting surface with the dihedral angle that the diapire formed is the obtuse angle.

In one embodiment, the at least one side wall includes a side plate and a first fixing plate that are disposed opposite to each other, the side plate is connected to the bottom plate, the first fixing plate includes the first mating surface and a first surface opposite to the first mating surface, and the first surface is connected to the side plate.

In one embodiment, the surface of the first fixing plate facing the side plate is provided with a plurality of first reinforcing ribs, the plurality of first reinforcing ribs are criss-cross, and the plurality of first reinforcing ribs face the plurality of surfaces of the side plate in a coplanar manner to form the first surface.

In one embodiment, the plurality of side walls include a first side wall and a second side wall that are disposed opposite to each other, and the first side wall and the second side wall both have the first mating surface.

In a second aspect, the present invention further provides a battery pack, wherein the battery pack includes a battery module and the battery tray of any one of the embodiments of the first aspect, the first fitting surface faces the battery module, the battery module has a second fitting surface, and the first fitting surface and the second fitting surface are surface fittings.

In one embodiment, the first mating surface and the second mating surface have a coefficient of friction therebetween, and the coefficient of friction has a value equal to or greater than the inverse of the absolute value of the tangent of the dihedral angle.

In one embodiment, the first mating surface is provided with a first guide protrusion, the second mating surface is provided with a first guide groove matched with the first guide protrusion, and at least part of the first guide protrusion is accommodated in the first guide groove, so that the battery module is slidably connected with the at least one side wall; or the like, or, alternatively,

the second matching surface is provided with a second guide protrusion, the first matching surface is provided with a second guide groove matched with the second guide protrusion, and at least part of the second guide protrusion is accommodated in the second guide groove, so that the battery pack is in sliding connection with the at least one side wall.

In one embodiment, the battery module further includes a second fixing plate and a battery cell, the second fixing plate includes the second mating surface and a second surface opposite to the second mating surface, and the second surface is used for connecting with the battery cell.

In one embodiment, the second surface is provided with connecting grooves filled with an adhesive for connecting with the battery cell.

The third aspect, the utility model also provides an automobile, the automobile includes the second aspect the battery package.

The dihedral angle that first fitting surface and diapire through setting up at least one side wall in the battery tray formed is the obtuse angle, and battery module can slide to suitable position along first fitting surface, even battery tray and battery module all have great size deviation, and battery module still can be through first fitting surface and battery tray assembly, and assembly process is simple to and owing to need not too high manufacturing accuracy, manufacturing cost is also lower.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1a is a schematic diagram of a battery pack according to an embodiment;

FIG. 1b is a schematic diagram of a battery pack according to another embodiment;

FIG. 1c is a schematic diagram of a battery pack according to another embodiment;

FIG. 1d is a schematic diagram of a battery pack according to another embodiment;

fig. 2 is an exploded view of the battery pack of fig. 1 a;

FIG. 3 is a force analysis diagram of the first and second fixation plates of FIG. 1 a;

FIG. 4 is a perspective view of the first fixing plate of FIG. 1 a;

fig. 5 is a perspective view of the first fixing plate of fig. 4 from another perspective;

fig. 6 is a perspective view of the second fixing plate of fig. 1 a;

fig. 7 is a perspective view of another view of the second fixing plate of fig. 6.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

Referring to fig. 1a, 1b and 4, an embodiment of the present invention provides a battery tray. The battery module comprises a plurality of side walls 100 and a bottom plate 200, wherein the bottom plate 200 and the plurality of side walls 100 are connected and enclose to form a cavity with one open end, and the cavity is used for accommodating the battery module 2000. The at least one side wall 100 has a first mating surface 102, and the base plate 200 includes a bottom wall 202, and a dihedral angle α formed by the first mating surface 102 and the bottom wall 202 is an obtuse angle.

In one embodiment, referring to fig. 1a, the plurality of sidewalls 100 includes a first sidewall 110 and a second sidewall 120 disposed opposite to each other, and the first sidewall 110 and the second sidewall 120 have a first mating surface 102. Specifically, the first side wall 110 and the second side wall 120 are located on opposite sides of the battery module 2000 in the expansion direction 2002, i.e., when the battery module 2000 expands, the battery module 2000 generates a pressure on the first side wall 110 and the second side wall 120. Because the first side wall 110 and the second side wall 120 both have the first mating surface 102, the cavity is shaped such that the size of the opening gradually increases from the bottom wall 202, which is beneficial for the battery module 2000 to be installed in the cavity, and the expansion of the battery module 2000 can be more effectively limited.

In another embodiment, referring to fig. 1c, the first sidewall 110 has a first mating surface 102, and a surface 1200 of the second sidewall 120 facing the battery module 2000 is perpendicular to the bottom wall 202. Thus, a cavity with the size gradually increased from the bottom wall 202 to the opening can be formed, which is beneficial to assembling the battery module 2000 with the battery tray.

Through setting up the dihedral angle alpha that first fitting surface 102 and diapire 202 formed of at least one side wall 100 in the battery tray are the obtuse angle, battery module 2000 can slide to suitable position along first fitting surface 102, even battery tray and battery module 2000 all have great dimensional deviation, battery module 2000 still can be through first fitting surface 102 and battery tray assembly, assembly process is simple to and owing to need not too high manufacturing accuracy, manufacturing cost is also lower.

In one embodiment, the at least one side wall 100 includes a first fixing plate 10 and a side plate 20, which are oppositely disposed, the first fixing plate 10 is located on a side of the side plate 20 facing the battery module 2000, the side plate 20 is connected to the bottom plate 200, the first fixing plate 10 includes a first surface 101 and a first mating surface 102, which are opposite to each other, and the first surface 101 is connected to the side plate 20. Specifically, the first fixing plate 10 may be made of hard plastic such as polyoxymethylene and polystyrene, or may be made of metal such as aluminum alloy, copper alloy, and copper simple substance, and is preferably made of hard plastic. A surface 201 of the side plate 20 facing the first fixing plate 10 is surface-fitted or fixed in abutment with the first surface 101. The first mating surface 102 includes a first end 1021 and a second end 1022 opposite to each other, the first end 1021 is adjacent to the bottom wall 202 and has a first distance D1 from the first surface 101, the second end 1022 has a second distance D2 from the first surface 101, and the first distance D1 is greater than the second distance D2. It is understood that the first fixing plate 10, the side plate 20 and the bottom plate 200 may be a unitary structure; the first fixing plate 10 and the side plate 20 may be an integral structure, and the whole of the first fixing plate 10 and the side plate 20 and the bottom plate 200 may be a detachable structure; preferably, the side plate 20 and the bottom plate 200 are of an integral structure, and the whole of the side plate 20 and the bottom plate 200 and the first fixing plate 10 are of a detachable structure. Through setting up first fixed plate 10 and curb plate 20, curb plate 20 need not to incline in diapire 202 towards surface 201 of first fixed plate 10, can reduce its manufacturing requirement, and moreover, first fixed plate 10 can be convenient for change, is favorable to promoting battery tray's life.

In one embodiment, referring to fig. 1a and 5, a plurality of first ribs 12 are disposed on a surface of the first fixing plate 10 facing the side plate 20, the plurality of first ribs 12 are criss-cross, and a plurality of surfaces of the plurality of first ribs 12 facing the side plate 20 are coplanar to form a first surface 101. Specifically, the surface of the first fixing plate 10 facing the side plate 20 is further provided with a positioning column 13, and the surface 201 of the side plate 20 facing the first fixing plate 10 is also provided with a corresponding positioning hole (not shown), so that the first fixing plate 10 and the battery tray are connected in a positioning manner. It can be appreciated that a plurality of surfaces of the plurality of first reinforcing beads 12 facing the side plate 20 are coplanar to form the first surface 101, so that the first fixing plate 10 reduces the mass of the first fixing plate 10 while securing the structural strength, thereby improving the energy density of the battery pack.

Referring to fig. 2 simultaneously, the utility model also provides a battery package, new energy automobile such as electric automobile, hybrid vehicle can be applied to the battery package, can also be applied to outdoor power supply etc.. The battery package includes battery module 2000 and the utility model provides a battery tray. When the battery pack is applied to an automobile, the battery pack can be fixed on the automobile body of the automobile and supplies energy to the automobile. Especially new forms of energy passenger train, the battery package can be fixed in the roof of automobile body. Through adding in the battery package the utility model provides a battery tray, the assembly process of battery package is simple and manufacturing cost is lower.

Specifically, the first mating face 102 faces the battery module 2000. The battery unit 2001 includes at least one unit battery 2011. When a plurality of unit batteries 2011 are provided, the plurality of unit batteries 2011 are stacked and connected in series to form the battery unit 2001, and generally, the stacking direction 2002 of the unit batteries 2011 is the expansion direction 2002 of the battery unit 2001 (the battery module 2000), and the first fixing plate 10 is positioned on the expansion direction 2002 side of the battery module 2000. The battery module 2000 has a second mating surface (2010, 303), the battery cell 2001 is likely to expand during use, and the first mating surface 102 and the second mating surface (2010, 303) are surface-mated. Specifically, the dimensional deviation of the battery module 2000 is the sum of the dimensional deviations of the plurality of battery cells 2001. The utility model discloses do not limit to the figure of battery unit.

It is understood that if the actual size of the battery module 2000 is larger than the designed size, the battery module 2000 can be fixed at a position slightly distant from the bottom wall 202 of the first mating surface 102; if the actual size of the battery module 2000 is smaller than the designed size, the battery module 2000 can be fixed at a position slightly closer to the bottom wall 202 of the first mating surface 102. Also, even if the dimensional deviation of the battery tray is so large that the dimensional deviation of the receiving cavity is large, the battery module 2000 can be fixed in place on the first mating surface 102. Furthermore, the utility model provides a battery tray need not the bolt, and battery module 2000 and battery tray need not to set up arch and trompil to battery module 2000 and battery tray manufacturing process have been simplified, and manufacturing cost has been reduced. In addition, in the existing battery tray, the bolts need to occupy certain space and the wrench needs to occupy certain space, so that the space utilization rate of the accommodating cavity of the battery tray is low. The utility model provides an among the battery tray, need not to set up the bolt, consequently can more effective appearance chamber of utilizing battery tray. Moreover, among the current battery tray, mainly by the inflation of end plate restriction battery module 2000, therefore the structural strength requirement of end plate is higher, and the end plate is the metal material usually, and the utility model provides a battery tray, through the crossbeam (not shown) that first fixed plate 10 transmits the pressure that battery module 2000 inflation produced to battery tray, battery tray's crossbeam's intensity is far greater than the end plate, can restrict battery module 2000 inflation more effectively. Moreover, the requirement on the strength of the first fixing plate 10 is low, and the first fixing plate 10 can be made of a plastic material with light weight, so that the weight of the battery pack is reduced, and the energy density of the battery pack is improved.

Specifically, the surface of the battery module 2000 facing the bottom wall 202 may be fixed to a pulling plate (not shown), and the surface of the pulling plate facing away from the battery module 2000 is fixed to the bottom wall 202 by adhesive. Or the battery module 2000 is directly adhered to the bottom wall 202.

In one embodiment, referring to fig. 1b, the battery module 2000 includes only the battery cell 2001, the first fixing plate 10 is directly connected to the battery cell 2001, and the second mating surface 2010 is a surface of the battery cell 2001 facing the first mating surface 102. At this time, the first fixing plate 10 and the battery unit 2001 are both wedge-shaped structures, and the battery unit 2001 may be one wedge-shaped battery cell 2011 or a wedge-shaped structure integrally formed by a plurality of battery cells 2011 (the battery cell 2011 close to the first fixing plate 10 is a wedge-shaped structure, and the remaining battery cells 2011 are ordinary rectangular structures). So that the first fixing plate 10 is engaged with the second engagement surface 2010. In this embodiment, the cavity can accommodate a battery cell 2001 with a larger volume, which is beneficial to further improve the space utilization of the cavity of the battery tray and improve the energy density of the battery pack.

In an example of this embodiment, referring to fig. 1b, the first side wall 110 and the second side wall 120 both have a first mating surface 110, and the battery unit 2001 has two second mating surfaces 2010 opposite to each other.

In another example of this embodiment, referring to fig. 1d, the first side wall 110 has a first mating surface, a surface of the battery unit 2001 facing the first side wall 110 is a second mating surface 2010, a surface 1200 of the second side wall 120 facing the battery unit 2001 is perpendicular to the bottom wall 202, and the surface 1200 is connected with the battery unit 2001.

In another embodiment, referring to fig. 1a, the first fixing plate 10 may also be indirectly connected to the battery unit 2001, in which case, the first fixing plate 10 has a wedge-shaped structure, and the battery unit 2001 may have a structure other than the wedge-shaped structure. In this embodiment, the battery cell 2001 may have a conventional shape such as a rectangular parallelepiped, the battery cell 2001 has high adaptability, and the manufacturing process of the battery cell 2001 is simple.

Specifically, referring to fig. 1a and fig. 2, the battery module 2000 further includes a second fixing plate 30, and the second fixing plate 30 includes a second mating surface 303 and a second surface 304 opposite to each other. The second mating face 303 is face-fitted with the first mating face 102, and the second surface 304 is used for connection with the battery cell 2001. Specifically, the second surface 304 is connected to the unit cell 2011 closest to the first mating surface 102 in the battery unit 2001. The second surface 304 may be fixed by surface-fitting or abutting the battery cell 2001, and may be fixed relative thereto by friction. And the connecting and fixing can also be realized by means of glue, threads and the like. By providing second fixing plate 30, second mating surface 303 of second fixing plate 30 mates with first mating surface 102 of first fixing plate 10, and second surface 304 of second fixing plate 30 is fixedly connected to battery cell 2001, battery module 2000 may have a structure other than a wedge shape, which is beneficial for simplifying the manufacturing process of battery cell 2001.

In an embodiment of this embodiment, please continue to refer to fig. 1a, the second fixing plates 30 are disposed on both sides of the battery unit 2001, and the second mating surfaces 303 of the second fixing plates 30 on both sides are connected to the battery tray.

In another example of this embodiment, referring to fig. 1c, a second fixing plate 30 is disposed on a side of the battery unit 2001 facing the first sidewall 110, and the second fixing plate 30 has a second mating surface 303. An end plate 40 is provided on the side of the battery cell 2001 facing the second side wall 120, and the end plate 40 and the battery tray are fixed by bolting. Of course, no other structure may be provided on the side of the battery unit 2001 facing the second side wall 120, and the battery unit 2001 may be directly connected to the second side wall 120.

In one embodiment, referring to fig. 1a and 3, the first mating surface 102 and the second mating surface 303 have a friction coefficient therebetween, and the friction coefficient has a value equal to or greater than the reciprocal of the absolute value of the tangent of the dihedral angle α. By setting the coefficient of friction μ between the first mating surface 102 and the second mating surface 303 to be equal to or greater than the reciprocal of the absolute value of the tangent of the dihedral angle α, the second fixing plate 30 can be self-locked with the first fixing plate 10, thereby fixing the battery unit 2001 in the cavity of the battery tray. It is understood that, when the battery module 2000 expands, the first fixing plate 10 is subjected to an expansion force F of the battery module 2000, and a component F1 of the expansion force F is F ═ cos β ═ F | _ cos β |, and F1 makes the first fixing plate 10 have a tendency to disengage from the cavity. The component F2 | sin β | of the expansion force F, the static friction force F > μ | F sin β | generated by F2, such that F > F1 due to μ ≧ 1/| tan α |. Therefore, even if the battery module 2000 expands such that the second fixing plate 30 receives the component force F1 out of the receiving cavity 101, the battery cell 2001 and the second fixing plate 30 are still stationary with respect to the first fixing plate 10 since the static friction force F is always greater than the component force F1.

In one embodiment, referring to fig. 4 and 6, the first mating surface 102 is provided with a first guiding protrusion 11, the second mating surface 303 is provided with a first guiding groove 31 mating with the first guiding protrusion 11, and at least a portion of the first guiding protrusion 11 is received in the first guiding groove 31, so that the battery module 2000 is slidably connected with the at least one sidewall 100. Alternatively, the second mating surface 303 is provided with a second guiding protrusion (not shown), the first mating surface 102 is provided with a corresponding second guiding groove (not shown), and at least a portion of the second guiding protrusion is accommodated in the second guiding groove, so that the battery module 2000 is slidably connected to the at least one sidewall 100. By providing the first guide groove 31 and the first guide protrusion 11, or the second guide groove and the second guide protrusion, the first fixing plate 10 and the second fixing plate 30 can be connected in alignment, and the second fixing plate 30 can be restricted from deviating from the first fixing plate 10 in a direction parallel to the first fitting surface 102 and the bottom wall 202.

Specifically, it is preferable that the surface of the first guide projection 11 facing away from the first mating surface 102 is perpendicular to the bottom wall 202, and the bottom surface of the first guide groove 31 is also perpendicular to the groove. The surface of the first guide protrusion 11 facing away from the first mating surface 102 is attached to the bottom surface of the first guide groove 31 and has the same shape.

In one embodiment, referring to fig. 6, a plurality of second ribs 32 are disposed on a surface of the second fixing plate 30 facing the first mating surface 102, the plurality of second ribs 32 are criss-cross, and a plurality of surfaces of the plurality of second ribs 32 facing the first mating surface 102 are coplanar to form a second mating surface 303. So set up, can be guaranteeing the intensity of second fixed plate 30, reduced the quality of second fixed plate 30.

In one embodiment, referring to fig. 1a and 7, the second surface 304 is opened with a connecting groove 33, and the connecting groove 33 is filled with an adhesive for connecting with the battery cell 2001. In particular, the adhesive is preferably viscose. The connecting grooves 33 are annular grooves connected end to end, and the bonding area is large, so that the second fixing plate 30 can effectively fix the battery unit 2001. It can be understood that, by forming the connecting groove 33, the adhesive is accommodated in the connecting groove 33, which can ensure the reliability of the adhesion and does not occupy the space in the accommodating cavity.

The embodiment of the utility model provides a still provide a car, the car can be new energy automobile such as fuel automobile or electric automobile, hybrid vehicle. The car includes the utility model provides a battery pack. Through adding in the car the utility model provides a battery package, the assembly process of car has obtained the simplification, and the manufacturing cost of car has reduced to a certain extent, has promoted auttombilism's reliability simultaneously.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a battery tray, its characterized in that includes bottom plate and a plurality of side wall, the bottom plate is with a plurality of the side wall is connected and is enclosed and form one end open-ended and hold the chamber, hold the chamber and be used for holding battery module, at least one the side wall has first fitting surface, the bottom plate includes the diapire, first fitting surface with the dihedral angle that the diapire formed is the obtuse angle.

2. The battery tray of claim 1, wherein the at least one side wall comprises a side plate and a first fixing plate that are disposed opposite to each other, the side plate is connected to the bottom plate, the first fixing plate comprises the first mating surface and a first surface opposite to the first mating surface, and the first surface is connected to the side plate.

3. The battery tray according to claim 2, wherein a surface of the first fixing plate facing the side plate is provided with a plurality of first reinforcing ribs, the plurality of first reinforcing ribs are criss-cross, and the plurality of first reinforcing ribs are coplanar with the plurality of surfaces of the side plate to form the first surface.

4. The battery tray of claim 1, wherein the plurality of side walls comprises a first side wall and a second side wall disposed opposite to each other, the first side wall and the second side wall each having the first mating surface.

5. A battery pack comprising a battery module and the battery tray of any one of claims 1 to 4, wherein the first mating surface faces the battery module, the battery module has a second mating surface, and the first mating surface and the second mating surface are surface-mated.

6. The battery pack according to claim 5, wherein the first mating surface and the second mating surface have a coefficient of friction therebetween, the coefficient of friction having a value equal to or greater than an inverse of an absolute value of a tangent of the dihedral angle.

7. The battery pack of claim 5, wherein the first mating surface has a first guide protrusion, the second mating surface has a first guide slot that mates with the first guide protrusion, and the first guide protrusion is at least partially received in the first guide slot such that the battery module is slidably coupled to the at least one sidewall; or the like, or, alternatively,

the first matching surface is provided with a second guide groove, the second matching surface is provided with a second guide protrusion matched with the second guide groove, and at least part of the second guide protrusion is accommodated in the second guide groove, so that the battery module is in sliding connection with the at least one side wall.

8. The battery pack of claim 5, wherein the battery module further comprises a second retaining plate and a battery cell, the second retaining plate comprising the second mating surface and a second surface opposite the second mating surface for connection to the battery cell.

9. The battery pack according to claim 8, wherein the second surface is provided with coupling grooves filled with an adhesive for coupling with the battery cells.

10. An automobile comprising the battery pack according to claim 9.