CN211265563U - Housing components for battery systems - Google Patents

Abstract

The present application relates to a housing assembly for a battery system, comprising: a bracket, a box body and a box cover; the bracket is of a frame structure and is arranged at the bottom end of the box body; the box body is of a flat plate structure and is arranged on the bracket, and the box body and the bracket are fixedly connected; the box cover is buckled at the upper end of the box body, and the box cover and the box body are fixedly connected; the box with the space that forms between the case lid is used for setting up electric core module. According to the scheme, the battery box body is separated from the mounting support of the battery, and the bracket is used as a part of the strength structure at the bottom of the battery system box body, so that the strength of the battery box body can be obviously enhanced, the height of the lower box body of the battery system is reduced, and the integral volume of the battery system is reduced; this structure makes the case lid not need to bear high strength, so the case lid can adopt the lighter material of quality to show the weight that reduces battery system.

Description

Housing components for battery systems

technical field

The present application relates to the technical field of electric vehicle battery packs, and in particular, to a casing assembly of a battery system.

Background technique

At present, the energy density of the lithium-ion battery system of electric vehicles is mainly through the improvement of the energy density of the battery cells, and the room for improvement is very small, but the battery system with high energy density is extremely pursued by various manufacturers. At present, in order to improve the energy density of the battery system, in addition to improving the energy density of the battery cells, manufacturers mainly optimize the installation method of internal modules and replace the battery box material with lightweight materials.

In the related art, except for the improvement of the energy density of the battery cells, there are mainly two ways to increase the energy density of the battery system: one is the module installation method, which is a reinforcement method that is widely used in the past to install the module frame to the bottom of the box with bolts. On the ribs, a large number of fixed structural parts of the module are now reduced and glued to the bottom of the battery box. Although this method can significantly improve the energy density of the battery system, it has extremely high requirements on the production process; the second is to replace The energy density of the battery system is improved for aluminum alloys or titanium alloys with low density, but since the price of aluminum alloys and titanium alloys is much higher than that of steel boxes and the processing technology is more complicated, the cost of mold opening is higher.

At present, the connectors of the lithium-ion battery system of electric vehicles are mainly installed in the openings on the surface of the lower box of the battery system. The existing method of installing the connector on the lower box has the following disadvantages: the lower box, as the main supporting structural component of the entire battery system, requires high-strength materials; however, after the connector is installed, the height of the lower box increases, and high-strength materials The increase in use increases the cost, increases the weight of the box, and reduces the overall energy density of the battery system.

SUMMARY OF THE INVENTION

In order to overcome the problems existing in the related art at least to a certain extent, the present application provides a casing assembly of a battery system.

According to an embodiment of the present application, a housing assembly of a battery system is provided, including: a bracket, a case body, and a case cover;

The bracket is a frame structure and is arranged at the bottom end of the box;

The box body is a flat plate structure, mounted on the bracket, and the two are fixedly connected;

The box cover is fastened on the upper end of the box body, and the two are fixedly connected;

The space formed between the box body and the box cover is used for arranging the battery core module.

Further, the bracket includes a cross beam and a vertical beam; the cross beam is perpendicular to the vertical beam, and the two are welded into one.

Further, both ends of the beam are bent towards the direction of the box to form a support portion, and a reinforcing rib is provided on the outer side of the support portion.

Further, the bracket includes three beams and three vertical beams; the three beams and the three vertical beams are arranged at equal intervals respectively;

Both the horizontal beam and the vertical beam are sheet metal parts, and screw holes are provided on the horizontal beam.

Further, the box body includes a rectangular flat plate; one side surface of the rectangular flat plate is fixedly connected to the bracket, and two sides of the side surface are provided with fixing parts extending outward, and the box body is connected to the bracket through the fixing parts. The bracket is fixed.

Further, the other side surface of the rectangular flat plate is fixedly connected to the box cover, the four peripheral edges of the side surface are provided with screw holes, and the box body is fixed to the box cover through the screw holes.

Further, the box cover includes a rectangular casing without a lid; a flange extending to the outside is provided around an end face of one side without a lid of the rectangular casing;

The coverless side of the rectangular casing is fastened to the box body, and is fixed to the box body through screw holes provided on the flange.

Further, an inwardly directed bar-shaped protrusion is provided on the other end face of the rectangular housing.

Further, the housing assembly further includes a mounting plate; a side wall of one end of the rectangular housing is provided with a mounting opening, and the mounting plate is fixed in the mounting opening and is used for drawing out the connector of the battery core.

Further, the mounting plate includes a rectangular plate body; the rectangular plate body is provided with a through hole, and the connector is embedded in the through hole.

The technical solutions provided by the embodiments of the present application have the following beneficial effects:

The solution of the present application separates the battery mounting bracket from the battery box body, and uses the bracket as a part of the strength structure at the bottom of the battery system box, which can significantly enhance the strength of the battery box and reduce the height of the lower box of the battery system. The overall volume of the battery system is reduced; this structure eliminates the need for the box cover to withstand high strength, so the box cover can be made of lighter materials, thereby significantly reducing the weight of the battery system.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not limiting of the present application.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description serve to explain the principles of the application.

FIG. 1 is a schematic structural diagram of a casing assembly of a battery system according to an exemplary embodiment.

FIG. 2 is a schematic structural diagram of the bracket in FIG. 1 .

FIG. 3 is a schematic structural diagram of the box in FIG. 1 .

FIG. 4 is a schematic structural diagram of the tank cover in FIG. 1 .

Fig. 5 is a schematic structural diagram of a mounting board according to an exemplary embodiment.

FIG. 6 is a schematic diagram of the assembly structure of the mounting plate and the box cover.

In the figure: 1 - bracket; 101 - beam; 102 - vertical beam; 103 - support part; 104 - reinforcing rib;

2-box body; 201-rectangular flat plate; 202-fixed part; 203-screw hole; 204-edge wrapping;

3-box cover; 301-rectangular shell; 302-strip protrusion; 303-flange; 304-installation opening;

4-installation plate; 401-rectangular plate body; 402-bending part; 403-through hole;

5- Connector.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with this application. Rather, they are merely examples of means consistent with some aspects of the present application as recited in the appended claims.

FIG. 1 is a schematic structural diagram of a casing assembly of a battery system according to an exemplary embodiment. The shell assembly includes: a bracket 1, a box body 2 and a box cover 3; the bracket 1 is a frame structure and is arranged at the bottom end of the box body 2; the box body 2 is a flat plate structure and is installed on the On the bracket 1, the two are fixedly connected; the box cover 3 is buckled on the upper end of the box body 2, and the two are fixedly connected; the space formed between the box body 2 and the box cover 3 is used for For setting the battery module.

The solution of the present application separates the battery mounting bracket from the body of the battery box 2, and uses the bracket 1 as a part of the strength structure at the bottom of the battery system box 2, which can significantly enhance the strength of the battery box 2 and reduce the lower box body of the battery system. 2 height, thereby reducing the overall volume of the battery system; this structure eliminates the need for the upper case 2 to withstand high strength, so the upper case 2 can be made of lighter materials, thereby significantly reducing the weight of the battery system.

Referring to FIG. 2 , in some embodiments, the bracket 1 includes a cross beam 101 and a vertical beam 102 ; the cross beam 101 is perpendicular to the vertical beam 102 , and the two are welded as a whole. The beam 101 and the vertical beam 102 are both sheet metal parts, and screw holes are formed on the beam 101 .

The bracket 1 is a one-piece structure, made of Q345 steel, welded by three horizontal and three vertical sheet metal parts, and has 12 screw holes at the bottom; the integrated bracket 1 can reduce the assembly steps of the battery bracket, strengthen the The strength of the battery case 2 and the weight of the battery system are reduced.

In some embodiments, the bracket 1 includes three transverse beams 101 and three vertical beams 102 ; the three transverse beams 101 and the three vertical beams 102 are respectively arranged at equal intervals.

In some embodiments, the two ends of the beam 101 are bent in the direction of the box body 2 to form a support portion 103 , and a reinforcing rib 104 is provided on the outer side of the support portion 103 .

3, in some embodiments, the box body 2 includes a rectangular flat plate 201; one side surface of the rectangular flat plate 201 is fixedly connected to the bracket 1, and two sides of the side surface are provided with outwardly extending The fixing part 202 , the box body 2 is fixed with the bracket 1 through the fixing part 202 .

Specifically, the fixing portion 202 is provided with screw holes corresponding to the screw holes provided on the beam 101, and is fixed by bolts.

The box body 2 is made of Q235 steel. Compared with other existing box body 2 structures, this solution significantly reduces the height of the lower box body 2, thereby reducing the use of high-strength steel and reducing the weight and cost of the entire battery system.

In some embodiments, the other side of the rectangular plate 201 is fixedly connected to the box cover 3 , and the four peripheral edges of the side are provided with screw holes 203 , and the box body 2 is connected to the box cover through the screw holes 203 . 3 to fix. Both ends of the rectangular flat plate 201 are also provided with edges 204 .

Referring to FIG. 4 , in some embodiments, the box cover 3 includes a rectangular casing 301 without a lid; a flange 303 extending outward is provided around one end face of the rectangular casing 301 without a lid. The coverless side of the rectangular casing 301 is fastened to the box body 2 , and is fixed to the box body 2 through screw holes provided on the flange 303 . The screw holes provided on the flange 303 correspond to the screw holes 203 on the box body 2 and are fixed by bolts.

The structure of the present application makes the tank cover 3 not need to bear high strength, so the tank cover 3 can be made of PCM composite material with lighter weight, which reduces the weight of the entire battery system.

In some embodiments, a bar-shaped protrusion 302 directed inward is provided on the other end surface of the rectangular casing 301 .

When assembling, first weld the integrated mounting bracket 1, then install the battery lower box 2 on the integrated bracket 1, then assemble the battery module and electrical components to the lower box 2; finally, install the box cover 3 Installed on the lower case 2.

5 and 6, in some embodiments, the housing assembly further includes a mounting plate 4; a side wall of one end of the rectangular housing 301 is provided with a mounting opening 304, and the mounting plate 4 is fixed on the In the installation port 304, a connector for drawing out the battery core.

The mounting plate 4 is made of Q235 steel, and a through hole for the connector 5 is opened on the surface of the plate.

In some embodiments, the mounting plate 4 includes a rectangular plate body 401 ; the rectangular plate body 401 is provided with a through hole 403 , and the connector 5 is embedded in the through hole 403 .

The four sides of the rectangular plate body 401 have bending portions 402 facing the same side.

When assembling, first assemble the internal structure of the battery to the lower battery box 2, and then install the connector 5 on the mounting plate 4. The mounting plate 4 and the battery box cover 3 are connected by bolts, and the sealing method is the box cover 3 and the mounting plate. The installation surface between 4 is pasted with a waterproof rubber pad for waterproof treatment.

In this application, the battery mounting bracket is separated from the body of the battery box 2, and the bracket 1 is used as a part of the strength structure at the bottom of the battery system box 2. The bracket 1 can significantly enhance the strength of the battery box 2 and reduce the impact of the battery system. Height of box 2. Since the box cover 3 does not need to withstand high strength, a composite material with very low density can be used, thereby significantly reducing the weight of the box body 2 and improving the energy density of the battery system.

In the present application, by arranging the mounting plate 4 for the connection of the connector 5 on the battery box cover 3, the height and weight of the battery box 2 are significantly reduced, thereby improving the energy density of the battery system; and the installation of the connector is integrated. Higher for easier automated installation.

It can be understood that, the same or similar parts in the above embodiments may refer to each other, and the content not described in detail in some embodiments may refer to the same or similar content in other embodiments.

It should be noted that, in the description of the present application, the terms "first", "second" and the like are only used for the purpose of description, and should not be construed as indicating or implying relative importance. Also, in the description of this application, unless otherwise specified, the meaning of "plurality" means at least two.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limitations to the present application. Embodiments are subject to variations, modifications, substitutions and variations.

Claims (10)

1. A housing assembly for a battery system, comprising: a bracket, a box body and a box cover;

the bracket is of a frame structure and is arranged at the bottom end of the box body;

the box body is of a flat plate structure and is arranged on the bracket, and the box body and the bracket are fixedly connected;

the box cover is buckled at the upper end of the box body, and the box cover and the box body are fixedly connected;

the box with the space that forms between the case lid is used for setting up electric core module.

2. The enclosure assembly of claim 1, wherein the bracket comprises a cross beam and a vertical beam; the cross beam is perpendicular to the vertical beam, and the cross beam and the vertical beam are welded into a whole.

3. The enclosure assembly of claim 2, wherein two ends of the cross beam are bent toward the box to form support portions, and reinforcing ribs are disposed on outer sides of the support portions.

4. The enclosure assembly of claim 3, wherein the bracket includes three cross beams and three vertical beams; the three cross beams and the three vertical beams are respectively arranged at equal intervals;

the crossbeam with erect the roof beam and be the sheet metal component, the screw hole has been seted up on the crossbeam.

5. The enclosure assembly of any of claims 1-4, wherein the box comprises a rectangular flat plate; one side of the rectangular flat plate is fixedly connected with the bracket, fixing parts formed by extending outwards are arranged on two sides of the side, and the box body is fixed with the bracket through the fixing parts.

6. The enclosure assembly of claim 5, wherein the other side of the rectangular plate is fixedly connected to the case cover, screw holes are formed in the peripheral edges of the other side, and the case body is fixed to the case cover through the screw holes.

7. The enclosure assembly of any of claims 1-4, 6, wherein the cover comprises a rectangular housing without a cover; the periphery of the end face of one side of the rectangular shell without the cover is provided with a flange extending outwards;

one side of the rectangular shell without the cover is buckled on the box body and is fixed with the box body through a screw hole arranged on the flange.

8. The enclosure assembly of claim 7, wherein an inwardly directed bar-shaped protrusion is provided on the other side end face of the rectangular housing.

9. The enclosure assembly of claim 7, further comprising a mounting plate; the battery cell connector is characterized in that a mounting opening is formed in the side wall of one end of the rectangular shell, and the mounting plate is fixed in the mounting opening and used for leading out a connector of a battery cell.

10. The housing assembly of claim 9, wherein the mounting plate comprises a rectangular plate; the rectangular plate body is provided with a through hole, and the connector is embedded in the through hole.

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