CN214013046U

CN214013046U - Lower case of battery pack

Info

Publication number: CN214013046U
Application number: CN202023230594.5U
Authority: CN
Inventors: 周月; 孙立新; 梁川; 樊少泽
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-08-20
Anticipated expiration: 2030-12-28

Abstract

The utility model provides a lower casing of battery package, the casing includes the bottom plate down, and the ring down the boundary beam that the bottom plate set up, in the installation roof beam has been linked firmly on the partial lateral surface of boundary beam, be equipped with on the installation roof beam for the installation department of battery package installation, and in the installation roof beam with deep floor has been linked firmly between the boundary beam, the boundary beam the installation roof beam reaches it arranges to be triangle-shaped between the deep floor, just deep floor with the angle beta that presss from both sides between the installation roof beam is between 45-60, deep floor with the tie point P both sides of installation roof beam the ratio of width L1 and width L2 of installation roof beam is 3: 1. the utility model discloses a lower casing of battery package can promote the installation intensity of battery package, and can improve the reliability of battery package installation.

Description

Lower case of battery pack

Technical Field

The utility model relates to a power battery technical field, in particular to lower casing of battery package.

Background

With the increasingly prominent environmental and resource problems and the strong support of governments of various countries, the traditional fuel oil automobile is gradually replaced by a new energy automobile, and in the new energy automobile, a power battery pack is used as an energy source of a finished automobile and occupies a very important position in the finished automobile. At present, because the battery pack is installed and fixed below the floor of an automobile through the shell of the battery pack, the installation reliability of the battery pack is very important, and if the installation reliability of the battery pack is insufficient, the whole automobile is difficult to meet the collision requirement, so that great potential safety hazards are brought.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention is directed to a lower housing of a battery pack, so as to improve the reliability of the battery pack installation.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the utility model provides a lower casing of battery package, lower casing includes the bottom plate, and the ring the boundary beam that the bottom plate set up, in the installation roof beam has been linked firmly on the partial lateral surface of boundary beam, be equipped with on the installation roof beam for the installation department of battery package installation, and in the installation roof beam with deep floor has been linked firmly between the boundary beam, the boundary beam the installation roof beam reaches be triangle-shaped between the deep floor and arrange, just deep floor with the angle beta that presss from both sides between the installation roof beam is between 45-60, deep floor with the tie point P both sides of installation roof beam the ratio of width L1 and width L2 of installation roof beam is 3: 1.

furthermore, the cross section of the mounting beam is divided into a plurality of cavities.

Furthermore, a connection point P between the reinforcing rib plate and the mounting beam is positioned between two adjacent cavities, and the top end of the reinforcing rib plate is connected to the top of the edge beam.

Further, the bottom of the mounting beam is flush with the bottom of the side beam, and the ratio of the height H1 of the mounting beam to the height H2 of the side beam is 1: 2.

furthermore, the mounting portion comprises a mounting column which is inserted and fixed on the mounting beam and provided with a mounting hole, and the top of the mounting column is arranged relative to the mounting beam in a protruding mode.

Furthermore, the mounting beams are arranged on the two sides of the lower shell and on the outer side of the boundary beam at the front end.

Furthermore, the outer side of the side beam at the rear end of the lower shell is fixedly connected with a mounting support for mounting the battery pack.

Furthermore, in the lower casing, be equipped with a plurality of crossbeams side by side between the front and back end of casing down, and be close to the front end of casing and rear end are equipped with front end longeron and rear end longeron respectively down, the rear end longeron is connected in being close to each of casing rear end down between the top of crossbeam, and each be equipped with the module mounting point on the crossbeam, be equipped with the water-cooling board mounting point on the rear end longeron.

Further, the rear end longeron is for following the many that the width direction of casing arranged side by side down, and including being located the middle part longeron at casing width direction middle part down, and be close to respectively the lateral part longeron that the both sides of casing set up down, just the front end longeron with middle part longeron collineation was arranged.

And furthermore, a cross beam groove is formed in the top of each cross beam, and water cooling plate avoiding grooves are formed in the tops of the middle longitudinal beam and the front end longitudinal beam.

Compared with the prior art, the utility model discloses following advantage has:

the utility model discloses a lower casing of battery package is through setting up deep floor between installation roof beam and boundary beam to make to be triangle-shaped between boundary beam, installation roof beam and the deep floor three and arrange, and also to the angle beta between deep floor and the installation roof beam simultaneously, and the installation roof beam width proportion of tie point P both sides optimizes the setting, can promote the installation intensity of battery package from this, thereby can improve the reliability of battery package installation.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural diagram of a battery pack according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a lower housing according to an embodiment of the present invention;

FIG. 3 is an isometric view of FIG. 2;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 5 is an enlarged view of portion B of FIG. 4;

FIG. 6 is an enlarged view of portion C of FIG. 3;

FIG. 7 is an enlarged view of portion D of FIG. 3;

description of reference numerals:

1. a base plate; 2. a boundary beam; 3. mounting a beam; 301. a cavity; 4. reinforcing rib plates; 5. mounting a column; 6. a cross beam; 601. a beam groove; 602. a module mounting point; 603. a water-cooled tube mounting hole; 7. a front end stringer; 701. the water cooling plate avoids the groove; 8. a rear end stringer; 801. a side rail; 802. a middle longitudinal beam; 9. mounting a bracket;

100. a lower housing; 200. and an upper housing.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms "front end," "back end," and the like are also intended to be descriptive only and are not intended to indicate or imply relative importance.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood in combination with the specific situation.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The present embodiment relates to a lower case 100 of a battery pack, and as shown in fig. 1, first, in the battery pack of the present embodiment, the case is composed of the lower case 100 and an upper case 200 fastened to the lower case 100. The battery module and the BMS, BDU, and other control parts of the battery pack are accommodated in a case formed by the lower case 100 and the upper case 200.

As shown in fig. 2 and fig. 3 in combination with fig. 4 and fig. 5, the lower housing 100 of this embodiment includes a bottom plate 1, and a side beam 2 disposed around a circumferential edge of the bottom plate 1, and a mounting beam 3 is fixedly connected to a part of an outer side surface of the side beam 2, the mounting beam 3 is provided with a mounting portion for mounting a battery pack, and a reinforcing rib plate 4 is also fixedly connected between the mounting beam 3 and the side beam 2.

The cross sections among the boundary beam 2, the mounting beam 3 and the reinforcing rib plate 4 are arranged in a triangular shape, so that the characteristics of a triangular structure can be utilized, and the structural stability is better. Also in the present embodiment, as a preferred embodiment, the angle β sandwiched between the reinforcing plate 4 and the mounting beam 3 is also between 45 ° and 60 °, and may be, for example, 45 °, 50 °, 55 °, or 60 °. Further, on this basis, the ratio of the width L1 and the width L2 of the mounting beam 3 on both sides of the connection point P of the reinforcing plate 4 and the mounting beam 3 of the present embodiment is also set to 3: 1.

in this embodiment, in order to improve the structural strength of the mounting beam 3, the cross section thereof is also divided into a plurality of cavities 301. At this time, preferably, the connection point P of the reinforcing plate 4 and the mounting beam 3 is located between two adjacent cavities 301, and the top end of the reinforcing plate 4 is connected to the top of the edge beam 2. In addition, as a preferred embodiment, the bottom of the mounting beam 3 and the bottom of the side beam 2 are arranged to be flush with each other, and the ratio of the height H1 of the mounting beam 3 to the height H2 of the side beam 2 may be set to 1: 2.

as an exemplary structure of the mounting portion, for example, it may include a mounting post 5 with a mounting hole that is inserted and fixed to the mounting beam 3, and a top portion of the mounting post 5 may also be preferably provided to be convex with respect to the mounting beam 3. Through the setting of erection column 5, can promote the intensity of the installation point of installation roof beam 3 well, and be convenient for the installation of battery package on the car, further, this embodiment still can set up the locating pin as illustrated in the right side in fig. 4 on installation roof beam 3 to can carry out prepositioning to erection column 5 when the installation, and do benefit to the screw in of construction bolt.

In this embodiment, referring to fig. 2 or fig. 3, as a possible implementation form, the lower shell 100, specifically, the mounting beams 3 are disposed on the outer sides of the side beams 2 at the two sides and the front end thereof, and reinforcing ribs 4 are disposed between each section of the mounting beam 3 and the side beam 2 at the position. Besides the mounting beams 3 at the front end and two sides, the mounting bracket 9 for mounting the battery pack is fixedly connected to the outer side of the boundary beam 2 at the rear end of the lower shell 100 as shown in fig. 1.

The mounting brackets 9 are preferably provided in plural at intervals in the width direction of the lower case 100, and each mounting bracket 9 is also provided with a mounting hole so as to be able to be connected to the vehicle body by a bolt. Meanwhile, each mounting bracket 9 may also be configured to be fixed to the edge beam 2 at the rear end of the lower case 100 by bolts, so that the mounting bracket 9 may be manufactured in a direction of separate press forming by the detachable arrangement of the mounting bracket 9, which may reduce the manufacturing cost.

The lower case 100 of the present embodiment, as shown in fig. 6 and 7, is combined, and in the lower case 100, a plurality of cross members 6 are also arranged side by side between the front and rear ends thereof, and a front end side member 7 and a rear end side member 8 are also provided respectively near the front end and the rear end of the lower case 100. And the rear end longitudinal beam 8 is connected between the tops of the cross beams 6 close to the rear end of the lower shell 100, module mounting points are arranged on the cross beams 6, and water cooling plate mounting points are arranged on the rear end longitudinal beam 8.

Through set up crossbeam 6 and front end longeron 7 and rear end longeron 8 in casing 100 down, the net additional strengthening that each roof beam body structure formed can be utilized to this embodiment, promote casing 100's structural strength down, meanwhile, connect between the top of crossbeam 6 through making the rear end longeron 8 that has the water-cooling board mounting point, also make rear end longeron 8 not contact with bottom plate 1 of casing 100 down, thereby stress concentration problem appears in the bottom plate that can avoid casing 100 down, in order to reduce the influence to casing 100 structural reliability down.

Specifically, in this embodiment, the cross beams 6 are specifically twelve cross beams arranged at intervals along the length direction of the lower housing 100, the front end longitudinal beams 7 are specifically two cross beams 6 sequentially distributed between the three cross beams 6 at the front end, and the bottoms of the cross beams 6 and the front end longitudinal beams 7 are connected to the bottom plate of the lower housing 100 by welding.

It is understood that the specific number of the cross members 6 and the front end side members 7 in the present embodiment can be adjusted accordingly based on the length of the lower case 100. In order to facilitate the overall light weight design of the lower shell 100, the cross beam 6, the front end longitudinal beam 7 and the rear end longitudinal beam 8 of the present embodiment are made of aluminum profiles, and the module mounting points 602 of the present embodiment are also made of rivet nuts.

In this embodiment, a beam groove 601 is also provided at the top of each beam 6, and a water-cooling plate mounting point is also provided in the beam groove 601 of two beams 6 near the front end of the lower casing 100, and the water-cooling plate mounting point may be a rivet nut, so that the water-cooling plate at the front end of the lower casing 100 can be mounted by a screw. And through set up crossbeam recess 601 on crossbeam 6, and set up the water-cooling plate mounting point in crossbeam recess 601, not only can alleviate the weight of each crossbeam 6, also can improve space utilization.

In addition to the water cooling plate mounting points provided on the cross beam 6, as a feasible implementation form, the water cooling plate mounting points may also be provided on the front end longitudinal beam 7, and the water cooling plate mounting points on the front end longitudinal beam 7 may also be provided by using rivet nuts.

In addition, as a preferred embodiment, the rear end side member 8 of the present embodiment is also a plurality of side members arranged side by side in the width direction of the lower case 100, and in a specific arrangement, the rear end side member 8 includes a middle side member 802 located in the middle of the lower case 100 in the width direction, and side members 801 respectively provided near both sides of the lower case 100.

In this case, in the arrangement of the rear end side members 8, the top portions of the cross members 6 near the rear end of the lower casing 100 are provided with the fitting grooves, and the side members 801 on both sides and the middle member 802 on the middle portion are fitted in the respective fitting grooves and then welded to the cross members 6.

In this embodiment, the middle longitudinal beam 802 and the side longitudinal beams 801 on both sides are also provided with water-cooling plate mounting points, and at this time, each water-cooling plate mounting point is formed by a threaded hole formed in each rear longitudinal beam 8, and the water-cooling plates in the battery pack can be fixed at each threaded hole by screws.

Also in a preferred embodiment, the front end stringers 7 and the center stringers 802 of the present embodiment are arranged in a collinear manner. Meanwhile, in order to facilitate the arrangement of the water-cooling plate in the battery pack in the lower case 100, a concave water-cooling plate avoiding groove 701 is also formed at the top of each of the middle longitudinal beam 802 and the front longitudinal beam 7, and a part of the water-cooling plate crossing the middle longitudinal beam 802 and the front longitudinal beam 7 is embedded in the water-cooling plate avoiding groove 701.

In this way, the provision of the grooves 701 by the water-cooling plates can reduce the weight of the front end side member 7 and the middle side member 802, thereby contributing to weight reduction. On the other hand, the space occupation of the water cooling plate in the height direction of the lower shell 100 can be reduced, thereby being beneficial to reducing the overall size of the battery pack.

It should be noted that, in the present embodiment, similar groove structures may be provided on the side stringers 801 on both sides according to specific design conditions, so as to reduce weight. The rear end longitudinal beam 8 of the present embodiment includes a middle longitudinal beam 802 and two side longitudinal beams 801, and of course, the number of the rear end longitudinal beams 8 and the positions thereof may also be adjusted based on the specific arrangement of the water-cooling plates 8, so as to achieve the installation of the water-cooling plates at the rear end of the lower shell 100.

In this embodiment, a water-cooling pipe mounting point for mounting a water-cooling pipe of a water-cooling plate is also provided on the partial cross member 6. At this time, the water-cooling tube mounting points on the cross beam 6 can specifically adopt water-cooling tube mounting holes 603, and structures such as fixing tube clamps for water-cooling tube mounting are inserted and fixed in the holes of the water-cooling tube mounting holes 603.

The lower casing of battery package of this embodiment is through setting up deep floor 4 between installation roof beam 3 and boundary beam 2 to make boundary beam 2, be triangle-shaped between installation roof beam 3 and the deep floor 4 three and arrange, and also to the angle beta between deep floor 4 and the installation roof beam 3 simultaneously, and the installation roof beam 3 width proportion of tie point P both sides optimizes the setting, can promote the installation intensity of battery package, can improve the reliability of battery package installation, and has fine practicality.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A lower casing (100) of battery package, lower casing (100) includes bottom plate (1), and the ring boundary beam (2) that bottom plate (1) set up, its characterized in that: the battery pack mounting structure is characterized in that a mounting beam (3) is fixedly connected to the partial outer side face of the side beam (2), a mounting portion for mounting a battery pack is arranged on the mounting beam (3), reinforcing plates (4) are fixedly connected between the mounting beam (3) and the side beam (2), the mounting beam (3) and the reinforcing plates (4) are arranged in a triangular mode, the angle beta formed by the reinforcing plates (4) and the mounting beam (3) is 45-60 degrees, and the ratio of the width L1 to the width L2 of the mounting beam (3) on the two sides of the connecting point P of the reinforcing plates (4) and the mounting beam (3) is 3: 1.

2. the lower case (100) of the battery pack according to claim 1, wherein: the cross section of the mounting beam (3) is divided into a plurality of cavities (301).

3. The lower case (100) of the battery pack according to claim 2, wherein: the connecting point P of the reinforcing rib plate (4) and the mounting beam (3) is positioned between two adjacent cavities (301), and the top end of the reinforcing rib plate (4) is connected to the top of the boundary beam (2).

4. The lower case (100) of the battery pack according to claim 1, wherein: the bottom of the mounting beam (3) and the bottom of the edge beam (2) are arranged in a flush manner, and the ratio of the height H1 of the mounting beam (3) to the height H2 of the edge beam (2) is 1: 2.

5. the lower case (100) of the battery pack according to claim 1, wherein: the installation part comprises an installation column (5) which is inserted and fixed on the installation beam (3) and provided with an installation hole, and the top of the installation column (5) is arranged relative to the installation beam (3) in a convex mode.

6. The lower case (100) of the battery pack according to any one of claims 1 to 5, wherein: the mounting beams (3) are arranged on the two sides of the lower shell (100) and on the outer side of the side beam (2) at the front end.

7. The lower case (100) of the battery pack according to claim 6, wherein: and the outer side of the side beam (2) at the rear end of the lower shell (100) is fixedly connected with a mounting bracket (9) for mounting the battery pack.

8. The lower case (100) of the battery pack according to claim 6, wherein: in lower casing (100), in be equipped with a plurality of crossbeams (6) side by side between the front and back end of lower casing (100), and be close to the front end of lower casing (100) is equipped with front end longeron (7) and rear end longeron (8) respectively with the rear end, rear end longeron (8) are connected in being close to each of casing (100) rear end down between the top of crossbeam (6), and each be equipped with module mounting point (602) on crossbeam (6), be equipped with the water-cooling board mounting point on rear end longeron (8).

9. The lower case (100) of the battery pack according to claim 8, wherein: rear end longeron (8) are for following the many that the width direction of casing (100) was arranged side by side down, and including being located middle part longeron (802) at casing (100) width direction middle part down, and be close to respectively lateral part longeron (801) that the both sides of casing (100) set up down, just front end longeron (7) with middle part longeron (802) collineation is arranged.

10. The lower case (100) of the battery pack according to claim 9, wherein: and the top of each cross beam (6) is provided with a cross beam groove (601), and the tops of the middle longitudinal beam (802) and the front end longitudinal beam (7) are provided with water cooling plate avoiding grooves (701).