CN217934111U

CN217934111U - Battery pack structure

Info

Publication number: CN217934111U
Application number: CN202221680794.7U
Authority: CN
Inventors: 孔素翠; 杨晓枫; 陈英旗; 曹楷; 曹辉
Original assignee: Shanghai Ruipu Energy Co Ltd; Rept Battero Energy Co Ltd
Current assignee: Shanghai Ruipu Energy Co Ltd; Rept Battero Energy Co Ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2022-11-29
Anticipated expiration: 2032-06-30

Abstract

The utility model provides a battery package structure, this battery package structure include box longeron, a plurality of parallel arrangement's box crossbeam, and at least one side of box crossbeam is connected with the curb plate to make and form 2 relative each other curb plates between the adjacent box crossbeam in order to press from both sides and establish electric core in groups. The curb plate includes the plate body and the mounting bar of vertical fixation in the first face of plate body, and the mounting bar is fixed in the upper surface of curb plate to realize the fixed connection of curb plate and box crossbeam. The relative both sides that lie in the box crossbeam at non-edge are connected with the curb plate respectively, connect in the unsmooth gomphosis of mounting bar of 2 curb plates of same box crossbeam to the mutual restriction improves the steadiness. This battery package structure can effectively the equipartition frame construction's atress, and mounting point intensity requirement reduces, reduces the box cost. Meanwhile, the design of a large module can be realized, and the space utilization rate of the battery pack box body is improved under the requirements of the same electric quantity or the same voltage, so that the energy density of the battery pack is improved.

Description

Battery pack structure

Technical Field

The utility model relates to a power battery field especially relates to a battery package structure.

Background

The battery pack of the electric automobile comprises a large number of battery cores to the module is used as a unit to be connected in series to form a group, so that the accumulation of the voltage and the electric quantity of the battery is realized, and the power requirement of the battery of the electric automobile is met. The main installation form of current electric core in groups and battery box mainly has two kinds: in the first form, the end plates and the side plates form a frame structure, and the battery cores are arranged in the frame structure in groups to complete electric connection and insulation protection to form a battery module assembly. The module is bolted to the box mounting beam through the end plate mounting holes at four angular positions. The structural members of the end plates and the side plates increase the weight and cost of the battery pack and reduce the energy density of the battery pack. For reducing structure quantity, adopt big module to replace little module in groups, this has increased the risk of end plate mounting point again undoubtedly, and big module causes the bulk rigidity to reduce by more electric cores in groups in addition, and the module electric connection intensity risk increases. The second form adopts electric core bottom bonding form, and the battery core is binded and is directly bonded to the box bottom rubber coating after in groups, and replacement can't be disassembled to this kind of form, and the echelon utilization difficulty has increased the battery package and has sold the back and retrieve the cost.

Therefore, it is necessary to provide a new battery pack structure to solve the above problems.

SUMMERY OF THE UTILITY MODEL

In view of the above shortcomings of the prior art, an object of the present invention is to provide a battery pack structure for solving the problems of the prior art that the frame structure is complex and the energy density of the battery pack is low.

In order to achieve the above objects and other related objects, the present invention provides a battery pack structure, which includes:

2 box longitudinal beams arranged at intervals;

the box body cross beams are arranged in parallel and are arranged among the 2 box body longitudinal beams and are vertically connected with the box body longitudinal beams;

the side plates are arranged on at least one side of the box body cross beam, so that 2 side plates which are opposite to each other are formed between the adjacent box body cross beams to clamp and form a group of electric cores.

Preferably, the side plate comprises a plate body and a mounting strip vertically fixed to a first surface of the plate body, and the mounting strip is fixed to the upper surface of the box body beam, so that the side plate is fixedly connected with the box body beam.

Preferably, the mounting bar includes a plurality of installation nodes, and each installation node all is equipped with the mounting hole in order to pass bolted connection the box crossbeam, and each installation node is located coplanar or not.

Preferably, an upper flange and a lower flange are respectively fixed to an upper edge and a lower edge of the second surface of the plate body to bear and limit the battery cells.

Preferably, one side of the mounting strip, which is far away from the plate body, is provided with a convex shape.

Preferably, the convex shape is a trapezoid, a triangle, a semicircle or an irregular shape.

Preferably, the opposite sides of the box body cross beam located at the non-edge are respectively connected with the side plates, and the mounting bars of 2 side plates connected to the same box body cross beam are embedded in a concave-convex mode.

Preferably, the side surfaces of the grouped battery cells are bonded with the side plates through structural adhesive, and the grouped battery cells comprise a plurality of battery cells which are arranged in parallel.

Preferably, the box girder comprises at least 1 hollow plate, and adjacent hollow plates are connected through a support.

Preferably, the box body longitudinal beams and the box body transverse beams are aluminum alloy plates or alloy steel plates, and the side plates are aluminum alloy plates.

As described above, the utility model provides a battery package structure, this battery package structure include box longeron, a plurality of parallel arrangement's box crossbeam, and at least one side of box crossbeam is connected with the curb plate to make and form 2 curb plates relative each other between the adjacent box crossbeam in order to press from both sides and establish electric core in groups. The curb plate includes the plate body and the mounting bar of vertical fixation in the first face of plate body, and the mounting bar is fixed in the upper surface of curb plate to realize the fixed connection of curb plate and box crossbeam. The relative both sides that lie in the box crossbeam at non-edge are connected with the curb plate respectively, connect in the unsmooth gomphosis of mounting bar of 2 curb plates of same box crossbeam to the mutual restriction improves the steadiness. Meanwhile, a gap exists between the side plate and the box body cross beam, so that the dimensional tolerance of the module or the deformation tolerance of the cross beam can be absorbed.

This battery package structure compares tradition and passes through end plate four corners bolt installation fixed, the atress that can effectively the equipartition frame construction, and mounting point intensity requirement reduces, reduces the box cost. The mode that the battery cores are directly placed in the box body frame is adopted, and the traditional end plate structure and connecting pieces are omitted. And the structural rigidity of the box body can be improved, the response of the integral mode of the grouped battery cells is improved, so that the safety factor of the battery pack under the conditions of impact, collision and the like is improved, and the safety of the whole vehicle is improved. The frame structure can realize large module design on the premise of ensuring the structural strength of the module, and improves the space utilization rate of the battery pack box body under the requirement of the same electric quantity or the same voltage, thereby improving the energy density of the battery pack.

Drawings

Fig. 1 shows the overall structure of the battery pack case of the present invention.

Fig. 2 is a schematic structural view of the middle side plate of the present invention.

Fig. 3 shows a schematic structural diagram of the middle box longitudinal beam of the present invention.

Fig. 4 shows a schematic diagram of the grouped cells of the present invention.

Fig. 5 is a schematic view of the overall structure of the battery pack of the present invention.

Description of the element reference numerals

11. First side plate

12. Second side plate

21. Box body longitudinal beam

31. Box body cross beam

41. Electric core

120. Plate body

121. Lower flange

122. Upper flange

123. Mounting bar

211. Hollow plate

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

As in the detailed description of the embodiments of the present invention, the cross-sectional views illustrating the device structure are not partially enlarged in general scale for convenience of illustration, and the schematic views are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.

For convenience in description, spatial relational terms such as "below," "beneath," "below," "under," "over," "upper," and the like may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that these terms of spatial relationship are intended to encompass other orientations of the device in use or operation in addition to the orientation depicted in the figures. Further, when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present. As used herein, "between 8230 \ 8230;" between "means both end points are included.

In the context of this application, a structure described as a first feature being "on" a second feature may include embodiments where the first and second features are formed in direct contact, and may also include embodiments where additional features are formed in between the first and second features, such that the first and second features may not be in direct contact.

It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and only the components related to the present invention are shown in the drawings rather than being drawn according to the number, shape and size of the components in actual implementation, and the form, amount and ratio of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.

As shown in fig. 1 to 5, the present embodiment provides a battery pack structure, which specifically includes:

2 box longitudinal beams 21 arranged at intervals;

the box body cross beams 31 are arranged in parallel, and the box body cross beams 31 are arranged among the 2 box body longitudinal beams 21 and are vertically connected with the box body longitudinal beams 21;

the battery case comprises a plurality of side plates arranged in parallel, wherein the side plates are installed on at least one side of the case body cross beam 31, so that 2 side plates opposite to each other are formed between the adjacent case body cross beams to clamp and establish a group of battery cells. The "plurality" means 2 or more.

Further, the side plate comprises a plate body 120 and a mounting bar 123 vertically fixed on a first surface of the plate body 120, and the mounting bar 123 is fixed on the upper surface of the box body beam 31 through a bolt, so that the side plate is fixedly connected with the box body beam 31.

Further, a convex shape is provided on one side of the mounting bar 123 far away from the plate body 120.

Further, the side plates are connected to opposite sides of the box cross member 31 located at non-edges, respectively, mounting bars connected to 2 side plates of the same box cross member 31 are fitted in a concave-convex manner, and a gap is formed between plate bodies 120 connected to the 2 side plates of the same box cross member 31.

Specifically, the box beam 31 located at the edge only needs to be provided with the side plates at one side thereof, and the box beam 31 located at the non-edge needs to be provided with the side plates at the opposite sides thereof, so that 2 side plates opposite to each other are formed between the adjacent box beams 31 to place the grouped electric cores. As shown in fig. 4 to fig. 5, the side surface of the battery cell group is connected to the side plate, and the battery cell group includes a plurality of battery cells 41 arranged in parallel. The curb plate can bond including the structure glue, the curb plate is inside to set up spacing or other fixed characteristics of electric core with the side connection form of group's electric core, the size specification of curb plate can be according to electric core weight design in groups for different thickness and height, and too much restriction is not done here. Wherein, 2 relative curb plates and battery module group are constituteed to the electric core in groups, and in addition, battery module still includes electric core series-parallel connection electric connector, insulator and protection upper cover isotructure.

As shown in fig. 1, the 2 side plates connected to the same box beam 31 are the first side plate 11 and the second side plate 12, and the first side plate 11 and the second side plate 12 are both provided with the mounting bars and are embedded with each other, so that the mutual limitation improves the stability. Taking the second side plate 12 as an example, as shown in fig. 2, the convex shape is a trapezoid, but may be a triangle, a semicircle or other irregular shapes. Meanwhile, a gap exists between the side plate and the box body cross beam, and the size tolerance (including the lateral expansion amount of the battery core) of the module can be absorbed, or the deformation tolerance of the cross beam can be absorbed.

Further, the mounting bar 123 includes a plurality of mounting nodes, each mounting node is provided with a mounting hole for passing through a bolt to connect the box body beam 31, and each mounting node is located on the same plane or not. Specifically, the number and positions of the mounting nodes and the mounting holes may be topologically distributed according to the number, size, weight, and installation space of the case. The installation nodes are not necessarily located on the same plane, and the positions of the installation nodes are independently determined according to actual requirements. Furthermore, the mounting nodes may be spaced apart such that the mounting bars are in the form of spaced apart segments, thereby forming the convex shape.

Further, an upper flange 122 and a lower flange 121 are respectively fixed on an upper edge and a lower edge of the second surface of the plate body 120 to carry the grouped battery cells. Meanwhile, the edges of the grouped battery cores can be coated and protected, and the grouped battery cores are limited and prevented from sliding. The first surface and the second surface of the plate body 120 are two opposite side surfaces.

Further, the box longitudinal beam 21 includes at least 1 hollow plate 211, and adjacent hollow plates 211 are connected through a support. The box body longitudinal beam can be a single or multiple cavity section extruded aluminum or cast aluminum structure or a sheet metal structure with energy absorption characteristics. Preferably, the box body longitudinal beams and the box body transverse beams are aluminum alloy plates or alloy steel plates, and the side plates are aluminum alloy plates.

Specifically, as shown in fig. 3, the hollow plate can also absorb the expansion of the grouped cells as an energy absorption feature. In addition, the box body longitudinal beam can be of a continuous plate-shaped structure, and gaps, holes and the like can be designed to meet arrangement requirements. The box body longitudinal beam is preferably an aluminum profile, and the structural form of the box body longitudinal beam comprises aluminum extrusion, casting, machining, stamping and the like. Similarly, the side plate is also preferably an aluminum profile, and can comprise structural forms such as aluminum extrusion + machining, integral injection molding, casting, stamping metal plates + welding brackets and the like.

To sum up, the utility model provides a battery package structure, this battery package structure include box longeron, a plurality of parallel arrangement's box crossbeam, and at least one side of box crossbeam is connected with the curb plate to make and form 2 curb plates relative each other between the adjacent box crossbeam in order to press from both sides and establish electric core in groups. The side plate comprises a plate body and a mounting strip vertically fixed on the first surface of the plate body, and the mounting strip is fixed on the upper surface of the side plate, so that the side plate is fixedly connected with the box body cross beam. The relative both sides that lie in the box crossbeam at non-edge are connected with the curb plate respectively, connect in the unsmooth gomphosis of mounting bar of 2 curb plates of same box crossbeam to the mutual restriction improves the steadiness. Meanwhile, a gap exists between the side plate and the box body cross beam, so that the dimensional tolerance of the module or the deformation tolerance of the cross beam can be absorbed.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention shall be covered by the claims of the present invention.

Claims

1. A battery pack structure, comprising:

2 box body longitudinal beams arranged at intervals;

2. The battery pack structure of claim 1, wherein the side plate comprises a plate body and a mounting bar perpendicularly fixed to a first surface of the plate body, and the mounting bar is fixed to an upper surface of the box cross beam, so that the side plate is fixedly connected with the box cross beam.

3. The battery pack structure of claim 2, wherein the mounting bar comprises a plurality of mounting nodes, each mounting node is provided with a mounting hole for connecting the box cross member through a bolt, and each mounting node is located on the same plane or not.

4. The battery pack structure of claim 2, wherein an upper flange and a lower flange are respectively fixed to an upper edge and a lower edge of the second surface of the plate body, so as to carry and limit the grouped cells.

5. The battery pack structure of claim 2, wherein the mounting bar is provided with a convex shape on an edge thereof remote from the plate body.

6. The battery pack structure of claim 5, wherein the convex shape is trapezoidal, triangular, semicircular, or irregular.

7. The battery pack structure according to claim 5, wherein the side plates are connected to opposite sides of the box cross member at non-edges, respectively, and mounting bars connected to 2 side plates of the same box cross member are fitted in a concavo-convex manner.

8. The battery pack structure of claim 1, wherein the side surfaces of the cells are bonded to the side plates by a structural adhesive, and the cells comprise a plurality of cells arranged in parallel.

9. The battery pack structure of claim 1, wherein the box stringers comprise at least 1 hollow plate, adjacent hollow plates being connected by a support.

10. The battery pack structure of claim 1, wherein the box side rails and the box cross rails are aluminum alloy plates or alloy steel plates, and the side plates are aluminum alloy plates.