CN118213700A

CN118213700A - Side beam, battery pack box and battery pack

Info

Publication number: CN118213700A
Application number: CN202211617544.3A
Authority: CN
Inventors: 赵家瑜; 刘涛然; 彭青波; 周燕飞; 鲁志佩
Original assignee: Wuwei Fudi Battery Co ltd; BYD Co Ltd
Current assignee: Wuwei Fudi Battery Co ltd; BYD Co Ltd
Priority date: 2022-12-15
Filing date: 2022-12-15
Publication date: 2024-06-18

Abstract

The present disclosure relates to a side rail, battery package box and battery package, wherein the side rail includes: the beam body comprises a top wall, a bottom wall and side walls, wherein the top wall and the bottom wall are oppositely arranged, the side walls are arranged between the top wall and the bottom wall, the first reinforcement comprises at least one reinforcing structure, the reinforcing structure comprises a plurality of supporting sections arranged at intervals and bending sections arranged between two adjacent supporting sections, two ends of the first reinforcement are fixedly connected with the top wall and the bottom wall respectively, and at least one inflection part of the bending sections is fixedly connected with the side walls. Through above-mentioned technical scheme, through the simple combination of the roof beam body and first reinforcement, when satisfying structural strength, can also promote the adaptability to the battery package that has not high electric core.

Description

Side beam, battery pack box and battery pack

Technical Field

The disclosure relates to the technical field of batteries, in particular to a side beam, a battery pack box body and a battery pack.

Background

The battery pack box body is an important component of the battery pack and plays a role in accommodating and protecting the internal battery cells. The frame of the battery pack box body is formed by splicing a plurality of side beams, and in the related art, the side beams are mostly manufactured by adopting an aluminum alloy profile extrusion process. However, the extrusion molding process makes the battery pack less adaptive, for example, in order to meet different endurance mileage, the battery pack is usually equipped with battery cells of different heights, and the design of the side beam needs to be adapted to the battery cells of different heights in consideration of factors such as structural stability, but when the side beam is molded by adopting the extrusion process, a set of mold needs to be correspondingly designed for the side beam of each size, which results in greatly increased production cost and is unfavorable for updating of products.

Disclosure of Invention

In order to overcome the problems in the related art, the present disclosure provides a side rail, a battery pack case, and a battery pack.

According to a first aspect of the embodiments of the present disclosure, there is provided a side beam, a plurality of the side beams are spliced to enclose a frame accommodating a battery cell, the side beam includes:

the beam body comprises a top wall and a bottom wall which are oppositely arranged, and a side wall arranged between the top wall and the bottom wall;

The first reinforcement comprises at least one reinforcement structure, the reinforcement structure comprises a plurality of supporting sections arranged at intervals and bending sections arranged between every two adjacent supporting sections, two ends of the first reinforcement are respectively fixedly connected with the top wall and the bottom wall, and at least one inflection part of the bending sections is fixedly connected with the side wall.

Optionally, the side walls extend in a vertical direction, and the top wall and the bottom wall extend horizontally in the first direction and/or the second direction, respectively.

Optionally, the top wall extends horizontally along a first direction, the bottom wall extends horizontally along a second direction, the first end of the first reinforcement is fixedly connected with the top wall, the second end of the first reinforcement extends horizontally along the second direction to form an extension section, and the extension section extends to overlap with the bottom wall and is fixedly connected with the bottom wall

Optionally, the first reinforcement comprises a plurality of reinforcement structures arranged in series.

Optionally, the included angle between the oblique sides of the inflection portion and the side wall is in a range of 30 ° or more and α or less than 60 °.

Optionally, the support section and the inflection portion are each configured in a platform shape, and both ends of the first reinforcement are the support section.

Optionally, the side beam further comprises a second reinforcement member configured in a strip shape, and the second reinforcement member is disposed on a side of the first reinforcement member away from the side wall and fixedly connected with the support section.

Optionally, the side beam further includes a third reinforcing member having at least one cavity formed along an extending direction of the beam body, and the third reinforcing member is disposed on a side of the first reinforcing member away from the side wall and fixedly connected with the support section.

Optionally, the beam body is a roll-pressing piece or a bending piece, and the first reinforcing piece is a stamping piece.

According to a second aspect of the disclosed embodiments, a battery pack case is provided, including a tray and a plurality of side beams fixedly disposed on an upper surface of the tray, the side beams being used for being spliced and enclosed to accommodate a battery cell frame, and the side beams being any one of the side beams.

According to a third aspect of the embodiments of the present disclosure, a battery pack is provided, including a battery cell and the battery pack case described above, where the battery pack case is configured to accommodate the battery cell.

The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects: the side beam comprises a beam body and a first reinforcing piece, wherein the beam body is used for supporting the battery cells, and the battery cells with different heights are adapted by forming the beam body. Compared with the prior art through the shaping mode of extruding the aluminium alloy, the roof beam body that this disclosure includes roof, diapire and lateral wall can be through simple technology shaping, and is better to the adaptability that the battery package was reformed transform, simultaneously through setting up first reinforcement, can promote the structural strength of roof beam body, in addition, in order to adapt to the not high roof beam body of difference, can intercept the first reinforcement of different length, and need not to open the mould again, has further promoted the adaptability that the side roof beam was reformed transform the battery package, is favorable to the product to update. That is, the present disclosure provides for a simple combination of the bridge body and the first reinforcement that, while satisfying structural strength, also provides for improved adaptability to battery packs having different height cells.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:

Fig. 1 and 2 are side rails provided in an exemplary embodiment of the present disclosure, wherein the height of the side rails in fig. 1 is smaller than the height of the side rails in fig. 2.

Fig. 3 is another side rail provided in an exemplary embodiment of the present disclosure.

Fig. 4 is a side rail of yet another embodiment provided by the present disclosure.

Description of the reference numerals

The battery comprises a beam body 1, side walls 11, a top wall 12, a bottom wall 13, a first reinforcing piece 2, a supporting section 21, a bending section 22, a bending section 221, an inflection part 23, an extending section 3, a second reinforcing piece 4, a third reinforcing piece 4 and a battery cell 5.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.

Unless otherwise indicated, terms of orientation such as "upper, lower, left, right" and "inner" are used herein to define the directions indicated by the corresponding drawings, and "inner" and "outer" are intended to refer to the inner and outer sides of the outline of the corresponding component itself. Furthermore, the terms "first," "second," and the like, herein used in order to distinguish one element from another element, without sequence or importance.

As illustrated in fig. 1 to 4, the embodiment of the present disclosure provides a side beam, in which a plurality of side beams are spliced to enclose a frame accommodating a battery cell 5, and specifically, the side beam of the present disclosure includes a beam body 1 and a first reinforcement 2. Depending on the manner in which the cells 5 are stacked, the frames may be spliced into different shapes, such as, for example, more common rectangular frames. In addition, the present disclosure is not limited to the manner of splicing between the side rails, and may be a detachable connection manner by a threaded fastener or by a buckle, or a fixed connection manner by welding, or the like.

The beam 1 comprises oppositely arranged top and bottom walls 12, 13 and side walls 11 arranged between the top and bottom walls 12, 13. The main body part of the beam body 1 serving as a side beam has the functions of fixing and supporting the battery cell 5 accommodated in the frame, and the battery cell 5 is prevented from loosening due to shaking. To meet different range requirements, the battery pack may be optionally configured with a higher battery cell 5, for example, to increase the energy density of the battery cell, so that the height of the beam body 1 may be adjusted to accommodate battery cells 5 of different heights in order for the side beams to still provide effective fixation and support for the battery cell 5. Alternatively, the beam body 1 including the simple structure of the top wall 12, the bottom wall 13, and the side walls 11 can be formed by a simple process such as rolling or bending. Compared with the prior art that the beam body formed by extruding the aluminum profile needs to redesign the die when changing the height, the beam body 1 disclosed by the invention has the advantage that the beam body 1 with different heights can be formed by one set of dies through the process of rolling or bending and the like.

The first reinforcement 2 comprises at least one reinforcement structure comprising a plurality of support sections 21 arranged at intervals and a bending section 22 arranged between two adjacent support sections 21, the first reinforcement 2 being in the form of a wave-shaped cross section. It should be noted that the wave shape herein may be construed broadly, that is, including but not limited to a sawtooth wave, a sine wave, a rectangular wave, and the like. Wherein, the both ends of first reinforcement 2 are respectively with roof 12 and diapire 13 fixed connection, and at least one inflection portion 221 and the lateral wall fixed connection of section of bending 22. That is, the first reinforcement 2 is fixedly connected to the top wall 12, the bottom wall 13, and the side wall 11, respectively, to thereby reinforce the structural strength of the beam 1. The beam body 1 and the first reinforcing piece 2 can be assembled through simple processes such as dispensing and/or welding, additional fasteners are not needed, good structural strength can still be ensured, the side beam can be assembled through fewer parts, and the design is simpler.

The amount of the first reinforcement 2 including the reinforcement structure may be determined according to the height of the beam body 1. Specifically, the distance between the top wall 12 and the bottom wall 13 of the beam body 1 determines the height of the beam body 1, so that the length of the first reinforcement 2 can be adjusted by adjusting the amount of the reinforcement structure to accommodate the beam bodies 1 of different heights. Fig. 1 shows a first reinforcement 2 comprising one reinforcement structure, and fig. 2 to 4 show a first reinforcement 2 comprising two reinforcement structures. Alternatively, the first reinforcing member 2 may be formed by punching, so that the first reinforcing member 2 of a predetermined length may be punched out and then cut out according to the height of the beam body 1 without re-opening the die.

The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects: the side beam of the present disclosure includes a beam body 1 and a first reinforcement 2, wherein the beam body 1 is used to fix and support the battery cells 5, and the battery cells 5 of different heights are adapted by molding the beam body 1 to different heights. Compared with the molding mode of extruding aluminum profiles in the related art, the beam body 1 comprising the top wall 12, the bottom wall 13 and the side wall 11 can be molded by a simple process, and the adaptability to battery pack modification is good. Through setting up first reinforcement 2, can promote the structural strength of the roof beam body 1, in order to adapt to the roof beam body 1 of co-altitude, can intercept the first reinforcement 2 of different length, and need not to open the mould again, further promoted the adaptability that the side roof beam was reformed transform to the battery package, be favorable to the product to update. That is, the present disclosure provides a simple combination of the bridge body 1 and the first reinforcement 2, while satisfying structural strength, and also improving adaptability to battery packs having different height cells 5.

The beam body 1 provided by the present disclosure may be configured to: the side walls 11 extend in a vertical direction and the top wall 12 and the bottom wall 13 extend horizontally in a first direction and/or a second direction, respectively. Specifically, in some embodiments, as shown in fig. 1 to 3, the beam body 1 is configured such that the top wall 12 and the bottom wall 13 are horizontally extended along the first direction, and in the embodiment shown in fig. 1, the cross section of the beam body 1 is C-shaped, and at this time, two ends of the first reinforcement member 2 are directly fixedly connected to the inner surfaces of the top wall 12 and the bottom wall 13. In other embodiments, as shown in fig. 4, the top wall 12 extends horizontally along the first direction, the bottom wall 13 extends horizontally along the second direction, and in the image, the cross section of the beam body 1 is zigzag, at this time, the first end of the first reinforcement member 2 is fixedly connected with the top wall 12, the second end of the first reinforcement member 2 extends horizontally along the second direction to form an extension section 23, and the extension section 23 extends to overlap with the bottom wall 13 and is fixedly connected with the bottom wall 13, so that the battery cell 5 can be supported by two layers of side beam thickness, thereby not only meeting the design requirement of a battery pack with high energy density, but also meeting the installation requirement of the whole vehicle. In still other embodiments, the top wall 12 and the bottom wall 13 may be configured to be horizontally extended in the first direction and the second direction to form the i-shaped beam body 1, so that the top wall 12 and the bottom wall 13 can clamp the battery cell 5 from the upper end and the lower end respectively while being fixedly connected with the first reinforcement 2, and further improve the fixing and supporting effects on the battery cell 5.

According to the embodiment of the present disclosure, the included angle between the oblique sides of the inflection portions 221 and the side wall 11 may be in the range of 30 ° or more and 60 ° or less, specifically, the distance between two adjacent inflection portions 221 may be adjusted by the included angle between the oblique sides of the inflection portions 221 and the side wall 11, that is, the length of the reinforcement structure along the extending direction may be adjusted, and thus the length of the intercepted first reinforcement 2 may be adjusted. For example, in order to further enhance the structural strength of the beam body 1, the included angle between the oblique sides of the two sides of the inflection portion 221 and the side wall 11 may be adjusted to include more reinforcing structures under the condition that the total length of the first reinforcing member 2 is not changed, so that more inflection portions 221 can be fixedly connected with the side wall 11 to enhance the structural strength of the side edge beam.

The two ends of the first reinforcement 2 are fixedly connected to the top wall 12 and the bottom wall 13, respectively, in some embodiments, the two ends of the first reinforcement 2 may be bent sections 22, and in other embodiments, as shown in fig. 1 to 4, the two ends of the first reinforcement 2 are support sections 21. This distinction can be achieved by the different cut-out locations. In the case that both ends of the first reinforcement 2 are the support sections 21, the support sections 21 and the inflection portions 221 may be both configured in a flat-plate shape, and the contact area between the first reinforcement 2 and the beam body 1 can be increased by the presence of such a flat-plate-like structure, so that the connection between the two is more secure and stable.

The present disclosure can be further combined to accommodate side beams of different battery packs as required, for example, the side beam including the beam body 1 and the first reinforcement 2 described above can be applied at least to battery packs having battery cells 5 of smaller height. Further, as the height of the battery cell 5 is continuously increased with an increase in energy density demand, the side sill of the present disclosure may further improve structural strength.

In some embodiments, as shown in fig. 3, the side rail further comprises a strip-shaped second reinforcement member 3, wherein the second reinforcement member 3 is disposed on a side of the first reinforcement member 2 away from the side wall 11 and fixedly connected to the support section 21. The structure of the second reinforcement 3, which is configured as a strip, mainly serves as an auxiliary reinforcement, which structure can thus be simpler than the first reinforcement 2, which has a wavy cross section. The two ends of the second reinforcement 3 may be fixedly connected to the two ends of the first reinforcement 2, respectively, for example, by means of spot gluing and laser welding or arc welding, and when the first reinforcement 2 is configured in a wave shape, a portion between the two ends of the second reinforcement 3 is fixedly connected to the at least one inflection 221, so as to improve the connection strength of the two.

In other embodiments, to further improve the structural strength of the side sill, as shown in fig. 4, the side sill may further include a third reinforcing member 4 having at least one cavity formed along the extending direction of the sill body 1, and the third reinforcing member 4 is disposed at a side of the first reinforcing member 2 away from the sidewall 11 and fixedly coupled to the supporting section 21. The third reinforcement 4 may be a square tube or a roll with cavities, and the number of cavities may be varied according to the need for structural strength. By arranging the third reinforcing piece 4, not only the structural strength of the side beam is improved, but also the extrusion resistance of the side beam is improved. In order to satisfy the light weight design, the third reinforcing member 4 may be provided only at the lower half portion of the beam body 1 as shown in fig. 4, and the side beam structure strength can be similarly improved.

The second object of the present disclosure is to provide a battery pack case, which includes a tray and a plurality of side beams fixedly arranged on an upper surface of the tray and used for being spliced to form a frame for accommodating a battery cell 5, wherein the side beams are the side beams in any one of the above embodiments and have all the beneficial effects thereof, and are not repeated herein. The side beams and the tray can be fixedly connected by welding and the like.

A third object of the present disclosure is to provide a battery pack, including the battery cell 5 and the battery pack case of any one of the above, where the battery cell 5 is accommodated in a frame surrounded by side beams spliced in the battery pack case.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the embodiments described above, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.

In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations are not described further in this disclosure in order to avoid unnecessary repetition.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims

1. A plurality of side roof beam the side roof beam concatenation encloses into the frame that holds the electric core, its characterized in that, side roof beam includes:

2. The side rail of claim 1, wherein the side walls extend in a vertical direction and the top and bottom walls extend horizontally in a first and/or second direction, respectively.

3. The side sill of claim 2 wherein the top wall extends horizontally in a first direction and the bottom wall extends horizontally in a second direction, the first end of the first reinforcement member being fixedly connected to the top wall and the second end of the first reinforcement member extending horizontally in the second direction to form an extension extending to overlap the bottom wall and being fixedly connected to the bottom wall.

4. The side rail of claim 1, wherein the first reinforcement comprises a plurality of reinforcement structures disposed in series.

5. The side sill according to claim 1 wherein the angle between the hypotenuses of both sides of the inflection and the side walls ranges from 30 ° to 60 °.

6. The side sill according to claim 1 wherein the support section and the inflection are each constructed in a platform-like manner and the support section is at both ends of the first reinforcement.

7. The side rail of claim 1, further comprising a second reinforcement member configured in a strip shape, the second reinforcement member being disposed on a side of the first reinforcement member remote from the side wall and fixedly connected to the support section.

8. The side rail of claim 1, further comprising a third reinforcement member having at least one cavity formed along an extension direction of the rail body, the third reinforcement member being disposed on a side of the first reinforcement member remote from the side wall and fixedly coupled to the support section.

9. The side rail of claim 1 wherein the rail body is a roll or a crimp and the first reinforcement is a stamping.

10. A battery pack case, characterized by comprising a tray and a plurality of side beams fixedly arranged on the upper surface of the tray and used for being spliced to form a frame for accommodating a battery cell, wherein the side beams are the side beams according to any one of claims 1-9.

11. A battery pack comprising an electrical cell and the battery pack housing of claim 10 for housing the electrical cell.