CN210956815U

CN210956815U - Battery lower box body

Info

Publication number: CN210956815U
Application number: CN202020120843.6U
Authority: CN
Inventors: 冯富春; 李良; 代康伟; 李彦良; 盛军
Original assignee: Beijing Electric Vehicle Co Ltd
Current assignee: Beijing Electric Vehicle Co Ltd
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2020-07-07
Anticipated expiration: 2030-01-19

Abstract

The utility model relates to a lower battery box, which comprises a module fixing beam and a lower shell; wherein, the module fixing beam and the lower shell are vertically overlapped together; a distance is reserved between the module fixing beam and the middle part of the lower shell, a battery accommodating bin is formed by the reserved distance, and a battery pack is accommodated in the battery accommodating bin; the side surface of the battery pack is welded on the inner side of the periphery of the module fixing beam; the utility model discloses simple structure, through under the battery box with the battery install on the automobile body to parts such as battery outlying module fixed beam, lower casing protect the battery not receive the damage, have prolonged the life of battery.

Description

Battery lower box body

Technical Field

The utility model relates to a box especially indicates a box of protection battery.

Background

The quick-change battery pack is mainly used for urban taxies and network appointment cars, the operation mileage of the quick-change battery pack is required to be over 60 kilometers, and compared with a private household car, the quick-change battery pack has higher structural reliability requirement; in addition, the quick-change battery pack is fixed with the whole vehicle through the quick-change bracket, but no protection structure is arranged on the periphery of the battery, so that the battery is damaged by external force except battery bumping in the driving process, and the service life of the battery is shortened.

SUMMERY OF THE UTILITY MODEL

The utility model provides a box structure of protection battery package realizes that the technical scheme of above-mentioned purpose as follows:

a lower battery box comprises a module fixing beam and a lower shell; wherein, the module fixing beam and the lower shell are vertically overlapped together; a distance is reserved between the module fixing beam and the middle part of the lower shell, a battery accommodating bin is formed by the reserved distance, and a battery pack is accommodated in the battery accommodating bin; the side of the battery pack is welded on the inner side of the periphery of the module fixing beam.

Optionally, the module fixing beam comprises a plurality of cross beams and vertical beams; the cross beams are arranged in parallel at intervals, and the vertical beams are laid on the cross beams in parallel at intervals; the cross beams and the vertical beams are crossed to form a plurality of Y-shaped structures; the edge of module fixed beam sets up first baffle, crossbeam, perpendicular roof beam are fixed in the space that first baffle surrounds.

Optionally, transition plates are arranged on two sides of each cross beam and on the side face of the first baffle, and the transition plates are connected with the battery pack in a welding mode.

Optionally, the lower casing comprises a first plate-shaped body, and the first plate-shaped body is provided with a through hole; and second baffles are arranged around the plate-shaped first body.

Optionally, the lower shell is an integrally stamped structure, and a shell reinforcing plate is arranged on the periphery of the second baffle in a matched manner.

Optionally, the bottom of the lower shell and the side surface of the second baffle are respectively provided with a reinforcing rib.

Optionally, the bottom shell further comprises a bottom reinforcing beam set, wherein the bottom reinforcing beam set comprises a plurality of bottom reinforcing beams arranged at intervals, and the bottom reinforcing beams are installed at the bottom of the lower shell; the middle part of the bottom reinforcing beam protrudes upwards, so that a first groove is formed in the middle part of the bottom reinforcing beam, and a plurality of screw holes arranged at intervals are formed in the top of the first groove.

Optionally, a bottom guard plate is further included; the bottom protection plate is of a plate-shaped structure, the middle part of the plate-shaped structure protrudes upwards, a second groove is formed in the middle part of the plate-shaped structure, a plurality of screw holes are formed in the top of the second groove, and screws are matched in the screw holes; the bottom guard plate is arranged at the bottom of the bottom reinforcing beam group, and the second groove is accommodated in the first groove; the screws sequentially penetrate through the screw holes of the bottom guard plate and the bottom reinforcing beam, and the bottom guard plate is connected with the bottom reinforcing beam group through the screws.

The utility model discloses simple structure, through under the battery box with the battery package install on the automobile body to parts such as battery package outlying module fixed beam, lower casing protect the battery package not receive the damage, have prolonged the life of battery package.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and 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 these drawings without inventive labor.

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a schematic side view of the present invention;

FIG. 3 is a schematic view of a module fixing beam;

FIG. 4 is a partial schematic view of a module mounting beam;

FIG. 5 is a schematic view of the lower housing;

FIG. 6 is a schematic view of a shell stiffener;

FIG. 7 is a schematic view of a quick-change locking mechanism;

FIG. 8 is a schematic view of the bottom shield;

description of reference numerals:

1-module fixed beam, 11-cross beam, 12-vertical beam, 13-first baffle, 14-transition plate, 2-lower shell, 21-through hole, 22-second baffle, 3-battery containing bin, 4-shell reinforcing plate, 5-quick-change locking mechanism, 6-bottom reinforcing beam, 7-bottom guard plate and 8-screw.

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 belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. At least one embodiment of the utility model provides the following technical scheme:

as shown in fig. 1 and 2, the lower case of the battery includes a module fixing beam 1, a lower case 2; the module fixing beam 1 and the lower shell 2 are vertically overlapped together, a distance is arranged between the module fixing beam 1 and the middle part of the lower shell 2 at intervals, a battery accommodating bin 3 is formed by the interval distance, and a battery pack is accommodated in the battery accommodating bin 3; the side surface of the battery pack is welded on the inner side of the periphery of the module fixing beam 1; the edges of the module fixing beam 1 and the lower shell 2 are connected by using screws.

The structures of the module fixing beam 1 and the lower housing 2 will be described in detail below:

as shown in fig. 3, the module fixing beam 1 includes a plurality of cross beams 11 and vertical beams 12; the cross beams 11 are arranged in parallel at intervals, and the vertical beams 12 are laid on the cross beams 11 in parallel at intervals; the cross beams 11 and the vertical beams 12 are crossed to form a plurality of Y-shaped structures, and the crossed arrangement not only saves materials, but also can improve the anti-extrusion capacity of the lower box body of the battery in the X direction and the Y direction; the edge of module fixed beam 1 sets up first baffle 13, and the height that highly is higher than crossbeam 11 of first baffle 13, the space that forms between first baffle 13 and crossbeam 11, the perpendicular roof beam 12 forms and holds the chamber that holds battery package upper portion.

Wherein, the height of the vertical beam 12 can be designed to the maximum height allowed by the space according to the height of the vehicle body; the strength is improved, and meanwhile, the bending rigidity and the torsional rigidity of the lower box body of the battery can be improved.

As shown in fig. 4, as a preferred embodiment, transition plates 14 are arranged on two sides of each cross beam 11 and on the side surfaces of the first baffle plates 13, the transition plates 14 are connected with the side surfaces of the cell packs by welding, the welding between the transition plates 14 and the cell packs forms spot welding, and the welding is not carried out at the positions where the transition plates are not arranged.

The welding form of the transition plate 14 and the battery pack is changed from the previous seam welding to spot welding, so that the stress area of the lower box body of the battery is increased, stress concentration is reduced, and the structural strength and the reliability of the lower box body of the battery are improved.

As shown in fig. 5, the lower case 2 includes a first plate-like body in which through holes 21 are dug, the through holes 21 reducing the weight of the lower case 2; the periphery of the first plate-shaped body is provided with the second baffle 22, and the height of the second baffle 22 is higher than that of the first plate-shaped body, so that a containing cavity is formed by the space surrounded by the second baffle 22 and the plate-shaped first body, and the bottom of the battery pack is located in the containing cavity.

As a preferred embodiment, the lower shell 2 is of an integrally stamped and formed structure; compared with a welded shell, the integrated stamping structure has the advantages that the structure rigidity is good, the battery pack can be effectively protected, the integrated forming process is simple, the upper sealing flange face of the lower shell 2 (namely, the flange face formed by the through holes 21 is arranged on the lower shell 2) is good in flatness, and the sealing problem of the lower shell 2 can be well solved.

Preferably, the bottom of the lower casing 2 and the side of the second baffle 22 are stamped with reinforcing ribs to improve the rigidity and strength of the lower casing 2.

As shown in fig. 6, since the lower casing 2 has a small thickness and low strength, another embodiment is to provide a casing reinforcing plate 4 fitted around the second baffle 22, and the casing reinforcing plate 4 is equivalent to a hoop for tightly hooping the lower casing 2, so as to further reinforce the strength of the lower casing 2.

As another embodiment, as shown in fig. 7, the housing reinforcing plate 4 is connected to a quick-change locking mechanism 5 in a fitting manner at an outer side thereof, the quick-change locking mechanism 5 includes a fixing plate with a plurality of sections having an L-shaped cross section, a screw hole is formed in a side surface of the fixing plate, a screw is fitted into the screw hole, and the side surface of the fixing plate is connected to the housing reinforcing plate and the first baffle plate by screws; the bottom surface of the fixed plate is attached to the bottom of the shell reinforcing plate 4 and the bottom of the lower shell 2.

The quick-change locking mechanism 5 is used for connecting a quick-change bracket, and the quick-change bracket is connected with the vehicle body, and the quick-change bracket is a part on the vehicle body in the prior art, so that the specific structure is not described in detail.

As another embodiment, the bottom shell further comprises a plurality of bottom reinforcing beam sets, each bottom reinforcing beam set comprises a plurality of bottom reinforcing beams 6, and the bottom reinforcing beams 6 are arranged at the bottom of the lower shell 2 at intervals; the middle part of the bottom reinforcing beam 6 protrudes upwards, so that a first groove is formed in the middle part of the bottom reinforcing beam 6, and a plurality of screw holes arranged at intervals are formed in the top of the first groove.

The condition of stone impact and bottom support often happens in the running process of the vehicle. After the battery pack is subjected to stone impact and bottom supporting, the battery core can be damaged, or the battery box body has cracks, so that the sealing performance is influenced; to solve this problem, as another embodiment, as shown in fig. 1, 2 and 8, a floor panel 7 is installed at the bottom of the bottom reinforcing beam 6; the bottom guard plate 7 is a plate-shaped structure, and the middle part of the plate-shaped structure protrudes upwards to form a second groove in the middle part of the plate-shaped structure; the top of second recess is provided with a plurality of screw holes, screw 8 is fit for in the screw hole.

Because the bottom guard plate 7 is arranged at the bottom of the bottom reinforcing beam group, the second groove of the bottom guard plate 7 is accommodated in the first groove of the bottom reinforcing beam 6; the screws 8 sequentially penetrate through screw holes in the bottom guard plate 7 and the bottom reinforcing beam 6, and the bottom guard plate 7 is connected with the bottom reinforcing beam 6 through the screws 8, so that the assembly, disassembly and replacement are convenient; the groove is arranged to prevent the head of the screw 8 from protruding out of the bottom protection plate 7, so that the screw 8 cannot scratch the ground during driving, and impact generated during driving acts on the bottom protection plate 7 to protect the battery pack from being damaged and prolong the service life of the battery pack.

Wherein, end backplate also can adopt the punching press shape, and end backplate adopts the structure to glue all around moreover and seals with bottom stiffening beam group, can prevent in the driving in-process gravel and sand earth gets into the backplate.

The bottom guard plate 7, the bottom reinforcing beam 6 and the lower shell 2 are designed in a conformal manner, and a screw 8 on the bottom guard plate 7 is not the lowest point; the space of the box body is utilized to the maximum extent, the gap between the whole vehicle and the ground is not reduced, and the integral strength can be improved.

The utility model discloses simple structure, through under the battery box with the battery package install on the automobile body to parts such as battery package outlying module fixed beam 1, lower casing 2 protect the battery package not receive the damage, have prolonged the life of battery package.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the embodiments of the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included in the scope of the embodiments of the present invention.

Claims

1. A lower battery box body is characterized by comprising a module fixing beam and a lower shell; wherein, the module fixing beam and the lower shell are vertically overlapped together; a distance is reserved between the module fixing beam and the middle part of the lower shell, a battery accommodating bin is formed by the reserved distance, and a battery pack is accommodated in the battery accommodating bin; the side of the battery pack is welded on the inner side of the periphery of the module fixing beam.

2. The lower battery box body according to claim 1, wherein the module fixing beam comprises a plurality of cross beams and vertical beams; the cross beams are arranged in parallel at intervals, and the vertical beams are laid on the cross beams in parallel at intervals; the cross beams and the vertical beams are crossed to form a plurality of Y-shaped structures; the edge of module fixed beam sets up first baffle, crossbeam, perpendicular roof beam are fixed in the space that first baffle surrounds.

3. The lower box body for the battery as claimed in claim 2, wherein transition plates are arranged on two sides of each cross beam and on the side surface of the first baffle plate, and the transition plates are connected with the battery pack in a welding mode.

4. The battery lower case according to claim 1, wherein the lower case comprises a first plate-shaped body, the first plate-shaped body having a through hole bored therein; and second baffles are arranged around the first plate-shaped body.

5. The battery lower case body according to claim 4, wherein the lower case body is a structure formed by stamping integrally, and a case body reinforcing plate is arranged on the periphery of the second baffle plate in a matched manner.

6. The battery lower case according to claim 4, wherein reinforcing ribs are respectively provided on the bottom of the lower case and the side surface of the second baffle.

7. The battery lower case body according to claim 1, further comprising a bottom reinforcing beam set, wherein the bottom reinforcing beam set comprises a plurality of bottom reinforcing beams arranged at intervals, and the bottom reinforcing beams are mounted at the bottom of the lower shell; the middle part of the bottom reinforcing beam protrudes upwards, a first groove is formed in the middle part of the bottom reinforcing beam, and a plurality of screw holes arranged at intervals are formed in the top of the first groove.

8. The battery lower case according to claim 7, further comprising a bottom guard plate; the bottom protection plate is of a plate-shaped structure, the middle part of the plate-shaped structure protrudes upwards, a second groove is formed in the middle part of the plate-shaped structure, a plurality of screw holes are formed in the top of the second groove, and screws are matched in the screw holes; the bottom guard plate is arranged at the bottom of the bottom reinforcing beam group, and the second groove is accommodated in the first groove; the screws sequentially penetrate through the screw holes of the bottom guard plate and the bottom reinforcing beam, and the bottom guard plate is connected with the bottom reinforcing beam group through the screws.