CN217589216U

CN217589216U - Bottom plate of battery box body, battery box body and battery

Info

Publication number: CN217589216U
Application number: CN202123260703.2U
Authority: CN
Inventors: 王晓宾; 李云庆; 徐博豪; 汤杰; 江吉兵
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2022-10-14
Anticipated expiration: 2031-12-23

Abstract

The utility model belongs to the technical field of the battery, a bottom plate of battery box, battery box and battery are disclosed, the bottom plate of this battery box includes frame and a plurality of bottom plate subassembly, the frame has the accommodation hole that a plurality of intervals set up, a plurality of bottom plate subassemblies set up with a plurality of accommodation hole one-to-ones, every bottom plate subassembly all including the upper plate, buffer layer and the lower plate that set gradually, upper plate and lower plate all with frame fixed connection, and the accommodation hole can be sealed to upper plate and lower plate homoenergetic. The bottom plate structural strength of this battery box is high, can realize the double containment of battery box, is provided with the buffer layer between upper plate and lower plate, can prevent when the lower plate receives the striking and the atress warp that the upper plate warp thereupon, and processing equipment is simple moreover, and can reduce the bottom plate thickness of battery box.

Description

Bottom plate of battery box body, battery box body and battery

Technical Field

The utility model relates to a battery technology field especially relates to a bottom plate, battery box and battery of battery box.

Background

The electric automobile has the advantages of environmental protection and energy conservation, and is widely accepted by people and widely popularized in the market. The electric automobile is a vehicle which is powered by a battery and driven by a motor to run. The battery box body is one of the main structural components of the battery, and the structural strength of the battery box body is designed by considering to enhance the structural strength of the battery box body so as to ensure that the structural components in the battery box body can be protected from being damaged, and the thickness of the bottom plate of the battery box body is considered to reduce the size of the battery in the height direction so as to improve the volume energy density of the battery.

The bottom plate of the existing battery box generally comprises: the reinforcing rib structure comprises a supporting frame, an upper flat plate, a lower flat plate and a plurality of reinforcing ribs, wherein the upper flat plate and the lower flat plate are arranged at intervals and fixedly arranged on the supporting frame, the plurality of reinforcing ribs are arranged at intervals, and two ends of each reinforcing rib are respectively fixedly connected with the upper flat plate and the lower flat plate. The battery box bottom plate with the structure has the advantages that the upper flat plate and the lower flat plate are only connected with the supporting frame, the upper flat plate and/or the lower flat plate are easy to deform, the structural strength of the bottom plate of the battery box body is weaker, a plurality of reinforcing ribs are arranged between the upper flat plate and the lower flat plate, the thickness of the bottom plate of the battery box body is larger, the processing steps are complicated, and the efficiency is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a bottom plate, battery box and battery of battery box to solve current battery box bottom plate structural strength and less strong, the thickness of the bottom plate of battery box is great moreover, and the processing step is loaded down with trivial details, the problem of inefficiency.

To achieve the purpose, the utility model adopts the following technical proposal:

a bottom plate of a battery case, comprising:

a frame having a plurality of receiving holes arranged at intervals;

the bottom plate assembly is provided with a plurality of accommodating holes in a one-to-one correspondence mode, each accommodating hole is formed in the bottom plate assembly and comprises an upper plate, a buffer layer and a lower plate which are sequentially arranged, the upper plate and the lower plate are fixedly connected with the framework, and the upper plate and the lower plate can be sealed with the accommodating holes.

As an optimal scheme of the bottom plate of the battery box, the frame comprises a frame and N cross beams, wherein the N cross beams are arranged on the frame at intervals and are fixedly arranged, the frame is provided with a through hole, the N cross beams divide the through hole into N +1 accommodating holes, the upper bottom plate is fixedly connected with the frame and the cross beams, and the lower bottom plate is fixedly connected with the frame and the cross beams.

As a preferable scheme of the bottom plate of the battery box, the cross beam has a first step surface and a second step surface which are arranged at intervals, the upper bottom plate is attached to the first step surface, and the lower bottom plate is attached to the second step surface.

As a preferable mode of the bottom plate of the battery box, the cross beam is provided with a first lightening hole along the extending direction of the cross beam.

As a preferred scheme of the bottom plate of the battery box, the frames include two first frames disposed opposite to each other and two second frames disposed opposite to each other, the two first frames and the two second frames enclose a rectangular structure, and two ends of the cross beam are welded to the two second frames, respectively.

As a preferable scheme of the bottom plate of the battery box, two ends of each cross beam are provided with grooves, two second frames are provided with protrusions, and the two protrusions can be respectively inserted into the two grooves of each cross beam.

As a preferable mode of the bottom plate of the battery box, the upper bottom plate and the lower bottom plate are both welded to the frame.

A battery box body comprises the bottom plate of the battery box body.

A battery comprises the battery box body.

As a preferred scheme of the above battery, the battery further comprises a supporting layer, a liquid cooling plate, a heat conduction layer and a battery cell module which are sequentially arranged, wherein the supporting layer, the liquid cooling plate, the heat conduction layer and the battery cell module are all located in the battery box body, and the supporting layer is supported on the upper base plate.

The utility model has the advantages that:

the utility model provides a bottom plate, battery box and battery of battery box, this bottom plate of battery box include frame and a plurality of bottom plate subassembly, and the frame has the accommodation hole that a plurality of intervals set up, and a plurality of bottom plate subassemblies set up with a plurality of accommodation hole one-to-ones, and every bottom plate subassembly is all including the upper plate, buffer layer and the lower plate that set gradually, upper plate and lower plate all with frame fixed connection, and the accommodation hole can be sealed to upper plate and lower plate homoenergetic. This battery box's bottom plate, frame are provided with a plurality of accommodation holes, a plurality of bottom plate subassemblies all with frame fixed connection, and a plurality of accommodation holes are sealed to a plurality of bottom plate subassemblies one-to-one, can improve battery box's bottom plate structural strength. In the bottom plate component, the upper bottom plate and the lower bottom plate are arranged at intervals and can seal the accommodating holes, so that double sealing of the battery box body can be realized, and when the lower bottom plate is damaged and sealing fails, the upper bottom plate can also continue to ensure the sealing of the battery box body. Be provided with the buffer layer between upper plate and the lower plate, the buffer layer can support the upper plate, guarantees the plane degree of upper plate to when the lower plate received the striking and the atress warp, the external force effect can be alleviated to the buffer layer, prevents that the upper plate warp thereupon, avoids the inside liquid cooling board and the electric core module of destroying of external force invasion battery box. And the upper bottom plate, the buffer layer and the lower bottom plate of the bottom plate assembly are sequentially arranged, so that the processing and assembling are simple, and the thickness of the bottom plate of the battery box body can be reduced.

Drawings

Fig. 1 is an exploded schematic view of a bottom plate of a battery box according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a bottom plate of a battery box according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of a bottom plate of a battery box according to an embodiment of the present invention;

fig. 4 is a cross-sectional view of a bottom plate of a battery box according to an embodiment of the present invention, taken along a second viewing angle;

FIG. 5 is an enlarged view at A in FIG. 4;

fig. 6 is a schematic structural diagram of a battery according to an embodiment of the present invention.

In the figure:

1. a frame; 11. a frame; 12. a cross beam; 13. an accommodation hole; 111. a second frame; 112. a first frame; 1111. a third lightening hole; 1112. a protrusion; 1121. a second lightening hole; 121. a first lightening hole; 122. a groove; 123. a first step surface; 124. a second step surface;

2. a base plate assembly; 21. an upper base plate; 22. a buffer layer; 23. a lower base plate;

3. a support layer;

4. a liquid cooling plate;

5. a heat conductive layer;

6. electric core subassembly.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures associated with the present invention are shown in the drawings, not all of them.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplification of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The utility model provides a bottom plate, battery box and battery of battery box, this battery box's bottom plate structural strength is high, can realize the double containment of battery box, is provided with the buffer layer between upper plate and the lower plate, can prevent that the upper plate is out of shape thereupon when the lower plate receives the striking and the atress warp, and the processing equipment is simple moreover, and can reduce the bottom plate thickness of battery box.

As shown in fig. 1 and 2, the bottom plate of the battery box comprises a frame 1 and a plurality of bottom plate assemblies 2, the frame 1 is provided with a plurality of accommodating holes 13 arranged at intervals, the plurality of bottom plate assemblies 2 are arranged in one-to-one correspondence with the plurality of accommodating holes 13, each bottom plate assembly 2 comprises an upper bottom plate 21, a buffer layer 22 and a lower bottom plate 23 which are arranged in sequence, the upper bottom plate 21 and the lower bottom plate 23 are fixedly connected with the frame 1, and the upper bottom plate 21 and the lower bottom plate 23 can both close the accommodating holes 13. This battery box's bottom plate, frame 1 are provided with a plurality of accommodation holes 13, a plurality of bottom plate subassembly 2 all with frame 1 fixed connection, and a plurality of accommodation holes 13 are sealed to a plurality of bottom plate subassembly 2 one-to-one, can improve battery box's bottom plate structural strength. In the bottom plate component 2, the upper bottom plate 21 and the lower bottom plate 23 are arranged at intervals and can both seal the accommodating holes 13, so that double sealing of the battery box body can be realized, and when the lower bottom plate 23 is damaged and sealing fails, the upper bottom plate 21 can also continuously ensure the sealing of the battery box body. Be provided with buffer layer 22 between upper plate 21 and lower plate 23, buffer layer 22 can support upper plate 21, guarantees upper plate 21's plane degree to when lower plate 23 received the striking and the atress warp, the external force effect can be alleviated to buffer layer 22, prevents that upper plate 21 from warping thereupon, avoids the external force to invade the inside liquid cooling board 4 and the electric core module of destroying of battery box. Moreover, the upper bottom plate 21, the buffer layer 22 and the lower bottom plate 23 of the bottom plate assembly 2 are sequentially arranged, so that the processing and the assembly are simple, and the thickness of the bottom plate of the battery box body can be reduced.

Optionally, the cushioning layer 22 is made of a foam-like material.

Alternatively, both the upper plate 21 and the lower plate 23 are welded to the frame 1. Upper plate 21 and lower plate 23 adopt the welded mode to connect in frame 1, compare in the mode that directly extrudes double-deck bottom plate, can reduce the bottom plate thickness of battery box, promote the volume energy density of battery.

Optionally, the frame 1 includes a frame 11 and N beams 12, the N beams 12 are spaced apart and fixedly disposed on the frame 11, the frame 1 has a through hole, the N beams 12 divide the through hole into N +1 receiving holes 13, the upper base plate 21 is fixedly connected to the frame 11 and the beams 12, and the lower base plate 23 is fixedly connected to the frame 11 and the beams 12. The frame 1 is a rectangular structure, a plurality of beams 12 are fixed on the frame 11 at intervals, and a plurality of receiving holes 13 are formed between the beams 12 and the frame 11 at intervals. The cross beam 12 can enhance the rigidity of the bottom plate of the battery box body along the width direction of the bottom plate of the battery box body, prevent the bottom plate of the battery box body from deforming along the width direction of the bottom plate of the battery box body and further increase the integral strength of the battery box body.

Optionally, the frame 11 includes two oppositely disposed first frames 112 and two oppositely disposed second frames 111, the two first frames 112 and the two second frames 111 enclose a rectangular structure, and two ends of the cross beam 12 are respectively welded to the two second frames 111. It can be understood that the first frame 112 is disposed parallel to the cross beam 12, the first frame 112 and the cross beam 12 are disposed along the width direction of the bottom plate of the battery box, and the second frame 111 is disposed along the length direction of the bottom plate of the battery box. The cross beam 12 is welded to the second frame 111, which can improve the structural strength of the frame 1.

Optionally, as shown in fig. 3, two ends of each cross beam 12 are provided with grooves 122, two second frames 111 are provided with protrusions 1112, and the two protrusions 1112 can be respectively inserted into the two grooves 122 of each cross beam 12. The protrusion 1112 of the frame 11 is inserted into the groove 122 of the cross beam 12, so that the cross beam 12 and the frame 11 can be assembled and positioned, and the frame 11 and the cross beam 12 can be conveniently welded.

Alternatively, as shown in fig. 4 and 5, the cross beam 12 has a first step surface 123 and a second step surface 124 which are arranged at intervals, the upper bottom plate 21 is attached to the first step surface 123, and the lower bottom plate 23 is attached to the second step surface 124. A first step surface 123 is processed on one side of the cross beam 12, which is located inside the battery box, a second step surface 124 is processed on one side of the cross beam 12, which is located outside the battery box, the upper bottom plate 21 is attached to the first step surface 123, and the first step surface 123 can support the upper bottom plate 21 and position the upper bottom plate 21, so that the welding between the upper bottom plate 21 and the cross beam 12 is easier. The lower plate 23 is attached to the second step surface 124, and the second step surface 124 can support the lower plate 23 and position the lower plate 23, so that the lower plate 23 and the cross beam 12 can be welded more easily.

Optionally, the frame 11 is provided with a third step surface and a fourth step surface, the third step surface is flush with the first step surface 123 of the cross beam 12 for supporting the upper base plate 21, and the fourth step surface is flush with the second step surface 124 of the cross beam 12 for supporting the lower base plate 23.

Optionally, in the extending direction of the cross beam 12, the cross beam 12 is provided with a first lightening hole 121. Optionally, along the extending direction of the first frame 112, the first frame 112 is provided with a second lightening hole 1121; along the extending direction of the second frame 111, the second frame 111 is provided with third lightening holes 1111. The weight of the bottom plate of the battery box body can be reduced, and the weight of the battery box body is further reduced.

The utility model also provides a battery box, this battery box include foretell battery box's bottom plate.

The utility model also provides a battery, this battery includes foretell battery box.

Optionally, as shown in fig. 6, the battery further includes a supporting layer 3, a liquid cooling plate 4, a heat conduction layer 5, and a battery cell module 6, which are sequentially disposed, where the supporting layer 3, the liquid cooling plate 4, the heat conduction layer 5, and the battery cell module 6 are all located in the battery box, and the supporting layer 3 is supported by the upper base plate 21. Liquid cooling board 4 is used for cooling down the battery, and heat-conducting layer 5 is used for strengthening the cooling effect with electric core module 6's heat conduction to liquid cooling board 4.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A bottom plate of a battery case, comprising:

a frame (1), wherein the frame (1) is provided with a plurality of accommodating holes (13) arranged at intervals;

a plurality of bottom plate subassembly (2), it is a plurality of bottom plate subassembly (2) and a plurality of accommodation hole (13) set up one-to-one, every bottom plate subassembly (2) all including upper plate (21), buffer layer (22) and lower plate (23) that set gradually, upper plate (21) with lower plate (23) all with frame (1) fixed connection, just upper plate (21) with lower plate (23) homoenergetic seals accommodation hole (13).

2. The bottom plate of the battery box body according to claim 1, wherein the frame (1) comprises a frame (11) and N cross beams (12), the N cross beams (12) are spaced and fixedly arranged on the frame (11), the frame (1) has a through hole, the N cross beams (12) divide the through hole into N +1 accommodating holes (13), the upper bottom plate (21) is fixedly connected with the frame (11) and the cross beams (12), and the lower bottom plate (23) is fixedly connected with the frame (11) and the cross beams (12).

3. The bottom plate of the battery box body according to claim 2, wherein the cross beam (12) is provided with a first step surface (123) and a second step surface (124) which are arranged at intervals, the upper bottom plate (21) is attached to the first step surface (123), and the lower bottom plate (23) is attached to the second step surface (124).

4. The floor panel of a battery box according to claim 2, characterized in that the cross beam (12) is provided with a first lightening hole (121) in the extension direction of the cross beam (12).

5. The bottom plate of the battery box body according to claim 2, wherein the frame (11) comprises two oppositely arranged first frames (112) and two oppositely arranged second frames (111), the two first frames (112) and the two second frames (111) enclose a rectangular structure, and two ends of the cross beam (12) are respectively welded with the two second frames (111).

6. The bottom plate of the battery box body according to claim 5, wherein two ends of each cross beam (12) are provided with grooves (122), two second frames (111) are provided with protrusions (1112), and the two protrusions (1112) can be respectively inserted into the two grooves (122) of each cross beam (12).

7. The bottom plate of a battery box according to claim 1, characterized in that the upper bottom plate (21) and the lower bottom plate (23) are welded to the frame (1).

8. A battery case comprising the bottom plate of the battery case according to any one of claims 1 to 7.

9. A battery comprising the battery case of claim 8.

10. The battery according to claim 9, further comprising a supporting layer (3), a liquid-cooled plate (4), a heat conducting layer (5) and a cell module (6) which are sequentially arranged, wherein the supporting layer (3), the liquid-cooled plate (4), the heat conducting layer (5) and the cell module (6) are all located in the battery box, and the supporting layer (3) is supported on the upper base plate (21).