CN216354511U - Lower shell, battery pack and power device - Google Patents

Abstract

The utility model discloses a lower shell, a battery pack and a power device. This lower casing includes: a base plate; the frame is fixedly wound on the outer periphery of the bottom plate, the frame and the bottom plate surround an installation space, and the frame is made of a first material; the module support is fixed on the bottom plate and located in the installation space, two ends of the module support are fixed with the frame, a module fixing position is arranged on the module support, the module support is made of a second material, and the strength of the first material is smaller than that of the second material. According to the lower shell, the module bracket is made of the second material with higher strength, so that the module bracket can be ensured to have better strength and rigidity.

Description

Lower shell, battery pack and power device

Technical Field

The utility model relates to the technical field of batteries, in particular to a lower shell, a battery pack with the lower shell and a power device with the battery pack.

Background

Among the correlation technique, the casing passes through the tailor-welding for the aluminum product and forms down, and this intensity that leads to the casing down is relatively poor, and welding process leads to the casing to warp great down, and the difficult management and control of module fixed hole site on the casing down, and welding process leads to the aluminum product material performance to reduce about 30%, secondly, in casing transportation down, the welding seam has the fracture risk, and because of the not good investigation of the gas tightness problem that the welding seam fracture leads to, in addition, the welding seam uniformity is poor, and the aesthetic property is relatively poor.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. Therefore, the utility model provides a lower shell, which has improved strength.

The utility model also provides a battery pack with the lower shell.

The utility model also provides a power device with the battery pack.

The lower case according to an embodiment of the present invention includes: a base plate; the frame is fixedly wound on the outer periphery of the bottom plate, the frame and the bottom plate surround an installation space, and the frame is made of a first material; the module support is fixed on the bottom plate and located in the installation space, two ends of the module support are fixed with the frame, a module fixing position is arranged on the module support, the module support is made of a second material, and the strength of the first material is smaller than that of the second material.

According to the lower shell provided by the embodiment of the utility model, the module bracket is made of the second material with higher strength, so that the module bracket can be ensured to have better strength.

According to some embodiments of the utility model, the module bracket has a bracket main flange, and the bracket main flange and the bottom plate are welded and fixed through a plurality of first welding points.

According to some embodiments of the utility model, the lower housing further comprises a cross beam, the cross beam is arranged to intersect with the module bracket, and two end portions of the cross beam are connected to the frame through a transfer bracket.

Specifically, the adaptor bracket includes: the first flanging is suitable for being attached to the cross beam, a first fixing hole is formed in the first flanging, a first fastener penetrates through the first fixing hole and then is fastened to the cross beam, the second flanging is suitable for being attached to the frame, a second fixing hole is formed in the second flanging, and a second fastener penetrates through the second fixing hole and then is fastened to the cross beam.

Further, the module support is a plurality of, and is a plurality of the module support includes middle support and edge support, the side of middle support be suitable for with the frame, the edge support all separates, the side of edge support be suitable for with the frame laminating, the switching support still includes: and the third flanging is suitable for being attached to the edge support, a third fixing hole is formed in the third flanging, and a third fastener penetrates through the third fixing hole and then is fastened to the edge support.

Still further, a plurality of the module holders include at least a middle holder, a side of the middle holder being adapted to be separated from the bezel, the middle holder being further separated from the edge holder. The beam is provided with a beam flanging, and the beam flanging and the bottom plate are welded and fixed through a plurality of second welding points.

According to some embodiments of the utility model, the beam is a beam made of a second material.

According to some embodiments of the utility model, the first material is aluminum and the second material is steel.

A battery pack according to an embodiment of the second aspect of the utility model includes: the battery module is fixed in the module fixing position through a fourth fastener.

According to the battery pack provided by the embodiment of the utility model, the lower shell has higher strength, so that the service life of the battery pack is prolonged.

A power plant according to an embodiment of the third aspect of the utility model includes the battery pack described above.

According to the power device provided by the embodiment of the utility model, the battery pack adopts the lower shell, so that the service life of the battery pack is prolonged, the battery pack does not need to be frequently replaced or maintained, and the service life of the power device is prolonged.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

FIG. 1 is a schematic perspective view of a lower housing according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a top view of a lower housing according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 3;

fig. 5 is a partially enlarged schematic view of C in fig. 4.

Reference numerals:

the module fixing device comprises a lower shell 10, a bottom plate 1, a frame 2, a module support 3, an edge support 31, a middle support 32, a module fixing position 33, a support main flanging 34, a support auxiliary flanging 35, a cross beam 4, a cross beam flanging 41, a shoulder 42, a switching support 5, a first flanging 51, a second flanging 52, a third flanging 53, a first fastener 61, a second fastener 62, a third fastener 63, a fifth fastener 64, a first welding point 71 and a second welding point 72.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

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

Furthermore, 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 at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The lower case 10 according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 5.

Referring to fig. 1 and 3, a lower case 10 according to an embodiment of the present invention may include: bottom plate 1, frame 2 and module support 3, frame 2 is fixed around the outer periphery at bottom plate 1, and frame 2 encloses the installation space with bottom plate 1.

Specifically, the bezel 2 is arranged around the outer periphery of the base plate 1 in a full circle. The frame 2 can be enclosed into a quadrilateral frame, and can also be enclosed into a circular, oval, triangular and other frames. The quadrangular frame can be formed by welding four blocks. In the embodiment shown in fig. 1 and 3, the frame 2 encloses a rectangular frame. Frame 2 has certain height, and frame 2 is located same one side of bottom plate 1 to make the installation space who encloses between frame 2 and the bottom plate 1 have certain degree of depth, make things convenient for the battery module to install in installation space.

In some embodiments, the frame 2 and the bottom plate 1 may be fixedly connected by welding. In other embodiments, as shown in fig. 3 to 5, the frame 2 and the base plate 1 may be detachably connected by a fifth fastening member 64, and this connection does not generate welding stress and can reduce the deformation of the frame 2 and the base plate 1. Alternatively, the fifth fastening member 64 may be a threaded fastening member such as a bolt, which is convenient to assemble and disassemble.

Module support 3 is fixed on bottom plate 1, and module support 3 is located the installation space, and the both ends of module support 3 still are fixed with frame 2 for module support 3 is fixed in the position of installation space, and module support 3 is difficult for rocking. The module bracket 3 and the frame 2 can be directly connected and fixed by welding, and can also be indirectly connected and fixed by utilizing an adapter.

Be provided with module fixed position 33 on the module support 3, the battery module is suitable for and fixes at module fixed position 33 department to realize the installation of battery module in casing 10 down, prevent effectively that the battery module from rocking.

In some embodiments, the height of the battery module may be greater than the depth of the installation space; of course, in other embodiments, the height of the battery module may be less than the depth of the installation space; alternatively, in other embodiments, the height of the battery module may be equal to the depth of the installation space.

The frame 2 is a frame made of a first material, the module bracket 3 is a bracket made of a second material, and the strength of the first material is smaller than that of the second material. Specifically, when parts of the same shape are made, the strength of the parts made using the first material is less than the strength of the parts made using the second material. The module support 3 is made of a second material with high strength, so that the module support 3 has high strength, the supporting force of the module support 3 on the battery module is improved, and the connection strength of the battery module and the lower shell 10 can be improved. In addition, module support 3 adopts the higher second material of intensity to make, can also guarantee that module support 3's rigidity is better, is difficult for taking place to warp.

According to the lower case 10 of the embodiment of the present invention, the module bracket 3 is made of the second material having higher strength, which can ensure that the module bracket 3 has better strength and rigidity, thereby improving the support strength and the support rigidity of the module bracket 3 to the battery module.

In some embodiments, the density of the first material is less than the density of the second material. Like this, frame 2 adopts the less, the less first material of intensity of density to make, and module support 3 adopts the great, the great second material of intensity of density to make, can guarantee that frame 2's weight is lighter, and module support 3's intensity is better.

In some embodiments, the module holder 3 and the base plate 1 may be fixed by spot welding. Referring to fig. 1 and 3, the module bracket 3 has a bracket main flange 34, the bracket main flange 34 is attached to the base plate 1, and the bracket main flange 34 and the base plate 1 are welded and fixed by a plurality of first welding points 71. The plurality of first welding spots 71 are distributed along the length direction of the module bracket 3, so that the first welding spots 71 for fixing are arranged between the module bracket 3 and the bottom plate 1 in the whole length direction of the module bracket 3, thereby being beneficial to improving the welding firmness. For the welding seam, the spot welding mode makes welding stress less, and welding position department warp less, and module fixed position 33 on the module support 3 is easily managed and controlled. In addition, the welding points are not easy to crack in the transportation process, so that the air tightness of the lower shell 10 is better. In addition, the consistency of welding spots is good, the appearance is attractive, and the influence of spot welding on the material performance is small.

In some embodiments, referring to fig. 1-3, the lower housing 10 may further include a cross member 4, the cross member 4 being disposed across the module bracket 3. The cross beam 4 is provided with a shoulder 42, the module bracket 3 is provided with a bracket auxiliary flange 35 pressed on the shoulder 42, and the bracket auxiliary flange 35 and the shoulder 42 can be fixed by welding or can be fixed by using a fastener, thereby being beneficial to improving the rigidity of the lower shell 10.

Alternatively, the cross beam 4 and the module bracket 3 may be arranged vertically.

The two ends of the beam 4 are connected with the frame 2 through the adapter bracket 5. Specifically, referring to fig. 1-2, the adapting bracket 5 may include a first flange 51 and a second flange 52, wherein the first flange 51 is adapted to be attached to the cross beam 4, the first flange 51 is provided with a first fixing hole, and a first fastener 61 is fastened to the cross beam 4 after penetrating through the first fixing hole. The second flange 52 is suitable for being attached to the frame 2, a second fixing hole is formed in the second flange 52, and the second fastener 62 is fastened to the cross beam 4 after penetrating through the second fixing hole. That is, the transit bracket 5 functions to connect the cross member 4 and the side frame 2. Like this, do not directly weld between crossbeam 4 and the frame 2 and link to each other, and realize cold joint through switching support 5 and first fastener 61, second fastener 62 to avoid the deformation problem that the welding brought, and the material property is difficult for reducing, and size precision manages and controls more easily.

In some embodiments, a threaded hole may be formed in the cross beam 4 corresponding to the first fixing hole, and the first fastening member 61 may be a screw, and the screw is threaded into the threaded hole after penetrating through the first fixing hole.

In other embodiments, a rivet hole may be formed in the cross beam 4 corresponding to the first fixing hole, and the first fastener 61 may be a rivet, and the rivet penetrates through the first fixing hole and the rivet hole in the cross beam 4 at the same time.

In some embodiments, a threaded hole may be formed in the frame 2 corresponding to the second fixing hole, and the second fastener 62 may be a screw, and the screw is threaded into the threaded hole after penetrating through the second fixing hole.

In other embodiments, a rivet hole may be formed on the frame 2 corresponding to the second fixing hole, and the second fastener 62 may be a rivet, which is simultaneously inserted through the second fixing hole and the rivet hole on the frame 2.

Further, the module support 3 is a plurality of, as shown in fig. 1 and 3, the plurality of module supports 3 at least include the edge support 31, the side of the edge support 31 is suitable for being attached to the frame 2, the adapting support 5 further includes a third flange 53, the third flange 53 is suitable for being attached to the edge support 31, a third fixing hole is formed in the third flange 53, and a third fastening member 63 is fastened to the edge support 31 after penetrating through the third fixing hole.

In some embodiments, a threaded hole may be formed in the edge bracket 31 corresponding to the position of the third fixing hole, and the third fastening member 63 may be a screw, and the screw is threaded into the threaded hole after penetrating through the third fixing hole.

In other embodiments, a rivet hole may be formed in the edge bracket 31 corresponding to the position of the third fixing hole, and the third fastener 63 may be a rivet, which is simultaneously inserted into the third fixing hole and the rivet hole in the edge bracket 31.

Optionally, the switching support 5 can be a sheet metal bending part, so that the strength of the switching support 5 is good, the forming process is simple, and materials are saved.

Referring to fig. 1 and 3, the cross beam 4 has a cross beam flange 41, the cross beam flange 41 is attached to the bottom plate 1, the cross beam flange 41 and the bottom plate 1 are welded and fixed through a plurality of second welding spots 72, and the second welding spots 72 are distributed along the length direction of the cross beam 4, so that the second welding spots 72 for fixing are arranged between the cross beam 4 and the bottom plate 1 in the whole length direction of the cross beam 4, and therefore the welding firmness degree is improved. Compared with a welding seam, the spot welding mode enables welding stress to be small and deformation at a welding position to be small. In addition, the welding points are not easy to crack in the transportation process, so that the air tightness of the lower shell 10 is better. In addition, the consistency of welding spots is good, the appearance is attractive, and the influence of spot welding on the material performance is small.

Further, the plurality of module holders 3 includes at least a middle holder 32, and the side of the middle holder 32 is adapted to be separated from the bezel 2, and the middle holder 32 is also separated from the edge holder 31. Alternatively, the middle bracket 32 and the edge bracket 31 may be arranged in parallel. When the frame 2 is a rectangular frame, the number of the edge supports 31 is two, the side edges of the two edge supports 31 are respectively attached to the frame 2 on the corresponding side, and the middle support 3 is located between the two edge supports 31.

Both the middle bracket 32 and the edge bracket 31 may be provided with a module fixing position 33, so that the battery module is spanned on the middle bracket 32 and the edge bracket 31, and the battery module is more stably mounted in the lower case 10.

Optionally, the cross beam 4 is a cross beam 4 made of a second material.

Optionally, the first material is aluminum and the second material is steel. That is to say, frame 2 is the aluminium frame, and module support 3 is the steel support, and crossbeam 4 is the steel crossbeam, and like this, lower casing 10 is steel aluminium mixed structure, and whole mechanical strength is more excellent. Because the strength of the steel sheet metal is much higher than that of the aluminum material, the volume of the steel part is smaller under the same strength according to the equivalent strength and equivalent rigidity conversion, and the lower shell 10 of the steel-aluminum mixed structure has better volume energy density. In addition, the cost of steel is generally lower than that of aluminum, so the lower case 10 of the steel-aluminum hybrid structure has a significant cost advantage compared to the conventional aluminum structure.

The battery pack according to the embodiment of the second aspect of the present invention may include: battery module and lower casing 10 of the embodiment described above, battery module is fixed in module fixed position 33 through the fourth fastener.

In some embodiments, the module fixing position 33 may be a threaded hole, and the fourth fastening member may be a screw, which is inserted into the mounting hole of the battery module and then screwed into the threaded hole.

In other embodiments, the module fixing site 33 may be a rivet hole, and the fourth fastener may be a rivet, which is simultaneously inserted through the rivet hole of the battery module and the rivet hole of the module bracket 3.

According to the battery pack of the embodiment of the utility model, the lower case 10 has high strength, thereby being advantageous to increase the service life of the battery pack.

A power plant according to an embodiment of the third aspect of the utility model includes the battery pack of the above-described embodiment.

According to the power device of the embodiment of the utility model, the battery pack adopts the lower shell 10, so that the service life of the battery pack is prolonged, the battery pack does not need to be frequently replaced or maintained, and the service life of the power device is prolonged.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. A lower housing, comprising:

a base plate (1);

the frame (2) is fixedly wound on the outer periphery of the bottom plate (1), the frame (2) and the bottom plate (1) enclose an installation space, and the frame (2) is made of a first material;

module support (3), module support (3) are fixed just be located on bottom plate (1) in the installation space, the both ends of module support (3) still with frame (2) are fixed, be provided with module fixed position (33) on module support (3), module support (3) are the support that the second material made, the intensity of first material is less than the intensity of second material.

2. The lower shell according to claim 1, characterized in that the module bracket (3) has a bracket main flange (34), and the bracket main flange (34) is welded and fixed with the bottom plate (1) through a plurality of first welding points (71).

3. The lower case according to claim 1, further comprising a cross member (4), wherein the cross member (4) is disposed across the module support (3), and both ends of the cross member (4) are adapted to be connected to the side frames (2) through a transfer support (5).

4. Lower shell according to claim 3, characterized in that said transition bracket (5) comprises: the first flanging (51) is suitable for being attached to the cross beam (4), a first fixing hole is formed in the first flanging (51), a first fastener (61) penetrates through the first fixing hole and then is fastened to the cross beam (4), the second flanging (52) is suitable for being attached to the frame (2), a second fixing hole is formed in the second flanging (52), and a second fastener (62) penetrates through the second fixing hole and then is fastened to the cross beam (4).

5. The lower case according to claim 4, wherein the module holders (3) are plural, the plural module holders (3) include a middle holder (32) and an edge holder (31), a side of the middle holder (32) is adapted to be separated from the bezel (2) and the edge holder (31), a side of the edge holder (31) is adapted to be engaged with the bezel (2), and the transfer holder (5) further includes: the third flanging (53) is suitable for being attached to the edge support (31), a third fixing hole is formed in the third flanging (53), and a third fastening piece (63) penetrates through the third fixing hole and then is fastened to the edge support (31).

6. The lower shell according to claim 3, wherein the cross beam (4) has a cross beam flange (41), and the cross beam flange (41) is welded and fixed with the bottom plate (1) through a plurality of second welding points (72).

7. Lower shell according to claim 3, characterized in that the cross-beam (4) is a cross-beam of the second material.

8. The lower shell of any of claims 1-7, wherein the first material is aluminum and the second material is steel.

9. A battery pack, comprising: the lower case of any one of claims 1 to 8, and a battery module fixed to the module fixing place (33) by a fourth fastening member.

10. A power plant comprising the battery pack of claim 9.

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