CN218274861U - Battery bottom protection plate structure, battery bottom protection assembly, battery and vehicle - Google Patents

Abstract

The application discloses backplate structure at bottom of battery, backplate body at bottom of including, backplate body at bottom includes first plywood, second plywood and strengthening rib structure, strengthening rib structure sets up first plywood with between the second plywood, the thickness of second plywood is greater than the thickness of first plywood. The application also discloses battery bottom protection component, battery and vehicle. This application can compromise intensity and lightweight.

Description

Battery bottom protection plate structure, battery bottom protection assembly, battery and vehicle

Technical Field

The application relates to the technical field of batteries, in particular to a battery bottom protection plate structure, a battery bottom protection assembly, a battery and a vehicle.

Background

The power battery is used as the energy core of the new energy vehicle, the arrangement position is mainly right below the passenger compartment, the battery pack bottom guard plate is directly contacted with the outside air, and the distance between the battery pack bottom guard plate and the ground is only dozens of centimeters, so the bottom structure of the battery pack needs to have enough strength.

The bottom protection scheme of the existing power battery generally sets a bottom protection plate and a buffer area at the bottom of an electric core, wherein the strength and the weight of the bottom protection plate in the prior art can not be considered, and the strength and the light weight can not be considered.

Therefore, it is necessary to design a battery bottom protection plate structure, a battery bottom protection assembly, a battery and a vehicle which can achieve both strength and light weight.

SUMMERY OF THE UTILITY MODEL

The utility model provides a guard plate structure, battery bottom protection subassembly, battery and vehicle under the battery, can compromise intensity and lightweight to overcome prior art's not enough, provide.

The technical scheme of this application provides a backplate structure at bottom of battery, including end backplate body, end backplate body includes first plywood, second plywood and strengthening rib structure, first plywood sets up the top of second plywood, strengthening rib structure set up first plywood with between the second plywood, the thickness of second plywood is greater than the thickness of first plywood.

Preferably, the reinforcing rib structure comprises vertical ribs, the vertical ribs are vertically arranged between the first laminate and the second laminate, and the vertical ribs are used for supporting the longitudinal corresponding positions of the gaps of the battery cores of the batteries.

Preferably, the reinforcing rib structure further comprises a diagonal rib, and the diagonal rib is obliquely arranged between the first laminate and the second laminate.

Preferably, the first laminate has a thickness of 1.6mm to 1.8mm, and the second laminate has a thickness of 2.3mm to 2.5mm.

Preferably, the first laminate, the second laminate and the stiffener structure are integrally formed.

The utility model also discloses a battery bottom protection component, protection plate structure at the bottom of foretell battery.

Preferably, the liquid cooling plate, the hard buffer layer and the soft buffer layer are further included, the hard buffer layer is arranged between the liquid cooling plate and the soft buffer layer, and the soft buffer layer is arranged between the first layer plate and the hard buffer layer.

Preferably, the bottom of the liquid cooling plate is provided with a cooling flow channel, the first surface of the hard buffer layer is provided with support ribs, and the support ribs and the cooling flow channel are arranged in a staggered mode in the longitudinal direction.

The utility model also discloses a battery, include as above-mentioned battery bottom protection component.

The utility model also discloses an automobile, including foretell battery.

After adopting above-mentioned technical scheme, have following beneficial effect:

the first plywood and the thickness of second plywood in the protection plate structure are different at bottom of the battery in this application, and the thickness of second plywood is bigger than the thickness of first plywood, through increasing the thickness of second plywood, improves the bottom to the performance that the protection is strikeed, in addition, through setting up the strengthening rib structure between first plywood and second plywood, can improve the overall structure intensity of protection plate structure at bottom of the battery, and then can realize taking into account intensity and lightweight.

Drawings

The disclosure of the present application will become more readily understood by reference to the drawings. It should be understood that: these drawings are for illustrative purposes only and are not intended to limit the scope of the present application. In the figure:

fig. 1 is a schematic overall structural diagram of a battery bottom protection plate structure according to an embodiment of the present invention;

fig. 2 is a schematic diagram of the overall structure of the bottom protection assembly of the battery according to one embodiment of the present invention;

fig. 3 is an exploded view of the battery bottom guard assembly of the present invention in one embodiment thereof;

fig. 4 is a schematic diagram of the overall structure of the battery according to one embodiment of the present invention;

fig. 5 is an exploded view of a battery according to one embodiment of the present invention.

Reference symbol comparison table:

end backplate body 1: the first layer plate 11, the second layer plate 12, the reinforcing rib structure 13, the vertical ribs 131 and the inclined ribs 132;

liquid-cooling plate 2: a cooling flow passage 21;

hard buffer layer 3: the support ribs 31;

a soft buffer layer 4;

and (3) battery cell 5: a gap 51.

Detailed Description

Embodiments of the present application are further described below with reference to the accompanying drawings.

It is easily understood that according to the technical solutions of the present application, those skilled in the art can substitute various structures and implementations without changing the spirit of the present application. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical solutions of the present application, and should not be construed as limiting or restricting the technical solutions of the present application in their entirety.

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Throughout the description of the present application, it is to be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "coupled" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The foregoing may be understood as pertaining to the specific meaning of the present application as the case may be, to one of ordinary skill in the art.

The utility model discloses a battery backplate structure in one of them embodiment, as shown in fig. 1, including backplate body 1, backplate body 1 includes first plywood 11, second plywood 12 and strengthening rib structure 13, and first plywood 11 sets up in the top of second plywood 12, and strengthening rib structure 13 sets up between first plywood 11 and second plywood 12, and the thickness of second plywood 12 is greater than the thickness of first plywood 11.

Further, the first laminate 11 and the second laminate 12 have the same size and shape and different thickness, generally, the first laminate 11 and the second laminate 12 are rectangular plates or square plates, the first laminate 11 and the second laminate 12 are arranged at intervals and the first laminate 11 and the second laminate 12 are parallel to each other, the reinforcing rib structure 13 is arranged between the first laminate 11 and the second laminate 12, the bottom surface of the first laminate 11 and the top surface of the second laminate 12 are fixedly connected together by the reinforcing rib structure 13, the battery bottom guard plate structure can be lighter and lighter by the reinforcing rib structure 13, and a deformation space is formed between the first laminate 11 and the second laminate 12, when the first laminate 11 or the second laminate 12 is deformed by impact, the first laminate 11 or the second laminate 12 can deform to the deformation space, so that the energy absorption effect is achieved.

In this application, to the safe protection in bottom, the thickness of first plywood 11 and second plywood 12 is selected to be inconsistent in the protection income, therefore, the thickness of first plywood 11 and second plywood 12 is different in this application, wherein, the thickness of second plywood 12 is big than first plywood 11, through the thickness that increases second plywood 12, thereby it is better to the effect that the protection is strikeed and the vehicle holds in the palm the end to improve the bottom, in addition, can improve the structural strength of protection plate structure at the bottom of the battery through setting up strengthening rib structure 13, consequently, this application can enough satisfy the intensity demand of bottom protection, also can satisfy the demand of lightweight simultaneously.

In some embodiments of the present invention, as shown in fig. 1, the reinforcing rib structure 13 includes a vertical rib 131, the vertical rib 131 is vertically disposed between the first layer board 11 and the second layer board 12, as shown in fig. 4, the vertical rib 131 is used to support a corresponding position in the longitudinal direction of the gap 51 of the battery cell 5.

Further, as shown in fig. 1, the vertical ribs 131 are longitudinally arranged between the first layer board 11 and the second layer board 12, wherein a plurality of vertical ribs 131 are arranged between the first layer board 11 and the second layer board 12, adjacent vertical ribs 131 are arranged at intervals, the upper ends of the vertical ribs 131 are fixedly connected with the bottom surface of the first layer board 11, the lower ends of the vertical ribs 131 are fixedly connected with the top surface of the second layer board 12, wherein the vertical ribs 131 can play a role in supporting and connecting the first layer board 11 and the second layer board 12, and meanwhile, due to the arrangement of adjacent vertical ribs 131 at intervals, a deformation space is formed between the first layer board 11 and the second layer board 12, so that the first layer board 11 or the second layer board 12 can deform to the deformation space when being impacted, thereby achieving an energy absorbing effect.

In addition, as shown in fig. 4, the vertical rib 131 is used for being supported at a position corresponding to the longitudinal direction of the gap 51 of the battery cell 5 of the battery, that is, the vertical rib 131 and the gap 51 of the battery cell 5 of the battery are in the same vertical direction, when the bottom of the battery bottom plate structure is subjected to a severe impact, the vertical rib 131 is subjected to a longitudinal upward acting force, and the acting force is transmitted through the vertical rib 131, and because the vertical rib 131 and the gap 51 of the battery cell 5 are in the same vertical direction, the upwardly transmitted acting force cannot be directly transmitted to the bottom of the battery cell 5, so that damage to the battery cell 5 caused by the impact can be reduced, and the protection effect can be improved.

In some embodiments of the present invention, as shown in fig. 1, the rib structure 13 further includes a diagonal rib 132, and the diagonal rib 132 is obliquely disposed between the first layer plate 11 and the second layer plate 12.

Further, the tilted ribs 132 are provided in a plurality of numbers, wherein, as shown in fig. 4, the tilted ribs 132 are provided below the bottom surface of the battery core 5 of the battery, the tilted ribs 132 are obliquely provided with the first layer board 11 and the second layer board 12, when the bottom of the battery bottom protection board structure is subjected to a severe impact, the tilted ribs 132 are subjected to a vertical upward acting force, and because the tilted ribs 132 are obliquely provided, a part of the vertical acting force transmitted by the tilted ribs 132 can be decomposed into a vertical separation perpendicular to the vertical direction, so that the stress on the bottom surface of the battery core 5 can be reduced, and the battery core 5 can be protected.

Preferably, the middle position of two adjacent vertical ribs 131 is provided with one tilted rib 132, that is, it can be ensured that the tilted rib 132 is located below the bottom surface of the battery cell 5, and the bottom surface of the battery cell 5 can also be supported by the tilted rib 132.

Optionally, a plurality of oblique ribs 132 are disposed between two adjacent vertical ribs 131 at intervals.

Preferably, the angle between the diagonal ribs 132 and the plane of the first or second layer of panels 11, 12 is 45 °.

In some embodiments of the present invention, the first ply 11 has a thickness of 1.6mm to 1.8mm and the second ply 12 has a thickness of 2.3mm to 2.5mm.

The first layer plate 11 is preferably 1.6mm thick, and the second layer plate 12 is preferably 2.5mm thick, so that the second layer plate 12 is prevented from being too thick, the weight is too large, the first layer plate 11 is prevented from being too thin, the processing difficulty is avoided, and the service life of a processing mold is influenced, therefore, the first layer plate 11 and the second layer plate 12 are set to different thicknesses, the light weight can be realized, and the protection strength of the bottom can be improved.

In some embodiments of the present invention, the first layer plate 11, the second layer plate 12 and the rib structure 13 are integrally formed.

Preferably, the first and second plies 11, 12 and the rib structure 13 are an integrally formed aluminium profile.

As a preferred embodiment of the present invention, as shown in fig. 1, the battery bottom protection plate structure includes a bottom protection plate body 1, the bottom protection plate body 1 includes a first layer plate 11, a second layer plate 12 and a reinforcing rib structure 13, wherein the first layer plate 11 and the second layer plate 12 are equal in size, the first layer plate 11 is parallel to and spaced from the second layer plate 12, and the reinforcing rib structure 13 is disposed between the first layer plate 11 and the second layer plate 12 and connects and fixes the first layer plate 11 and the second layer plate 12. Preferably, the first laminate 11, the second laminate 12 and the rib structure 13 are of an integrally formed aluminum profile.

Further, the thickness of second plywood 12 is greater than the thickness of first plywood 11, and preferably, the thickness of first plywood 11 sets up to 1.6mm, and the thickness of second plywood 12 sets up to 2.5mm, and then can realize improving the barrier propterty of bottom, also can reduce holistic weight, realizes the lightweight.

In addition, the reinforcing rib structure 13 includes vertical ribs 131 and diagonal ribs 132, wherein the bottom surface of the first layer board 11 is connected to the upper end of the vertical ribs 131, the top surface of the second layer board 12 is connected to the lower end of the vertical ribs 131, the vertical ribs 131 are perpendicular to the first layer board 11 and the second layer board 12, and wherein the vertical ribs 131 are respectively arranged at intervals. The vertical ribs 131 are correspondingly disposed below the longitudinal position of the gap 51 of the battery cells 5. The tilted ribs 132 are disposed between the adjacent vertical ribs 131, the tilted ribs 132 are tilted with respect to the plane where the first layer plate 11 and the second layer plate 12 are located, and the tilted ribs 132 are correspondingly disposed below the bottom surface of the battery cell 5. When the bottom receives an impact, the longitudinal acting force transmitted by the vertical rib 131 acts on the gap 51 of the battery cell 5, and the longitudinal acting force transmitted by the diagonal rib 132 can be decomposed into a component force perpendicular to the longitudinal direction, so that the impact on the bottom surface of the battery is reduced, and therefore, the damage of the impact on the battery cell 5 can be reduced by arranging the vertical rib 131 and the diagonal rib 132.

The utility model also discloses a battery bottom protection component, as shown in fig. 2 and fig. 3, including foretell battery end protection plate structure. Wherein, the battery bottom protection plate structure is arranged at the bottom of the battery bottom protection component.

In some embodiments of the present invention, as shown in fig. 2 and fig. 3, the liquid cooling plate 2, the hard buffer layer 3, and the soft buffer layer 4 are further included, the hard buffer layer 3 is disposed between the liquid cooling plate 2 and the soft buffer layer 4, and the soft buffer layer 4 is disposed between the first laminate 11 and the hard buffer layer 3.

Further, as shown in fig. 2 and fig. 3, the liquid cooling plate 2 is disposed at the bottom of the battery electric core 5, the electric core 5 can be cooled through the liquid cooling plate 2, the sizes of the liquid cooling plate 2, the hard buffer layer 3, the soft buffer layer 4 and the battery bottom guard plate structure are equal, and the liquid cooling plate 2, the hard buffer layer 3, the soft buffer layer 4 and the battery bottom guard plate structure are respectively stacked from top to bottom along the longitudinal direction.

Wherein, stereoplasm buffer layer 3 can play the effect of support liquid cold plate 2 to stereoplasm buffer layer 3 also can play the guard action, has strengthened the protective capacities of bottom, and stereoplasm buffer layer 3 also can play the heat preservation effect simultaneously, makes liquid cold plate 2 can keep low temperature. Soft buffer layer 4 sets up between the backplate structure at the bottom of stereoplasm buffer layer 3 and the battery, can increase shock-absorbing capacity through soft buffer layer 4, can utilize soft buffer layer 4 to cushion simultaneously, reduces the rigid contact between backplate structure and the stereoplasm buffer layer 3 at the bottom of the battery, and then can improve the NVH performance of vehicle.

In some embodiments of the present invention, as shown in fig. 2 and 3, the bottom of the liquid cooling plate 2 is provided with a cooling flow channel 21, the first surface of the hard buffer layer 3 is provided with a support rib 31, and the support rib 31 and the cooling flow channel 21 are arranged in a staggered manner in the vertical direction.

Further, the cooling flow channel 21 is used for conveying a cooling medium, such as a cooling liquid, and the heat of the battery cell 5 can be taken away through the flow of the cooling medium, thereby realizing the effect of cooling the battery cell 5, wherein the first surface of the hard buffer layer 3 is provided with the support rib 31, the arrangement of the support rib 31 is adapted to the cooling flow channel 21 for setting, wherein the support rib 31 and the cooling flow channel 21 are arranged in a staggered manner in the longitudinal direction, that is, the support rib 31 can be in contact with the non-flow channel region of the liquid cooling plate 2, and further, when an impact occurs, the longitudinal acting force cannot be transmitted to the cooling flow channel 21, thereby reducing the risk of deformation of the cooling flow channel 21.

Furthermore, the hard buffer layer 3 and the soft buffer layer 4 with the thickness of 1 mm-2 mm are compounded into a whole, so that the heat preservation and buffering effects can be effectively achieved.

In some embodiments of the present invention, the hard buffer layer 3 is made of hard plastic.

Further, the hard plastic can be a combination of one or more materials such as PU, ABS, POM, PS, PMMA, PC, PET, PBT, PPO, MPPE and the like.

Preferably, the hard buffer layer 3 is made of PU plastic.

In some embodiments of the present invention, the soft buffer layer 4 is made of flexible foam.

Further, the flexible foam can be a combination of one or more of CR foam, melamine foam, EVA foam, and the like.

Preferably, the soft buffer layer 4 is made of melamine foam.

As a preferred embodiment of the present invention, as shown in fig. 2 and fig. 3, the bottom protection component of the battery includes a liquid cooling plate 2, a hard buffer layer 3, a soft buffer layer 4 and the bottom protection plate structure of the battery described above, wherein the liquid cooling plate 2 is disposed on the bottom surface of the battery electric core 5, for cooling the battery electric core 5, the hard buffer layer 3 is disposed below the liquid cooling plate 2, for supporting the liquid cooling plate 2 and keeping warm to the liquid cooling plate 2, and the soft buffer layer 4 is disposed between the hard buffer layer 3 and the first layer plate 11 of the bottom protection plate structure of the battery, for providing a buffering effect.

Further, the bottom of liquid cooling plate 2 is provided with cooling runner 21, can cool down liquid cooling plate 2 through cooling runner 21, thereby can take away the heat of electric core 5, the effect of cooling to electric core 5 is realized, upper surface at stereoplasm buffer layer 3 is provided with brace rod 31, brace rod 31 adapts to cooling runner 21 and arranges, brace rod 31 arranges with cooling runner 21 staggered arrangement on vertical promptly, make brace rod 31 can with the regional contact of the non-cooling runner 21 of liquid cooling plate 2, and then avoid vertical effort to act on cooling runner 21, reduce the risk that cooling runner 21 warp.

Wherein, stereoplasm buffer layer 3 is preferred to adopt rigid polyurethane foam, and its protective capacities that can strengthen the bottom plays the heat preservation effect simultaneously, and soft buffer layer 4 is preferred to adopt flexible bubble cotton to make, can play the cushioning effect through soft buffer layer 4, can avoid rigid contact between stereoplasm buffer layer 3 and the battery bottom protection plate structure simultaneously, improves the NVH performance of vehicle.

The utility model also discloses a battery, as shown in fig. 4 and 5, including foretell battery bottom protection component.

The utility model also discloses a battery, including foretell battery.

What has been described above is merely the principles and preferred embodiments of the present application. It should be noted that, for a person skilled in the art, several other modifications can be made on the basis of the principle of the present application, and these should also be considered as the scope of protection of the present application.

Claims (10)

1. The utility model provides a backplate structure at bottom of battery, its characterized in that, includes backplate body (1) at the bottom, backplate body (1) includes first plywood (11), second plywood (12) and strengthening rib structure (13), first plywood (11) set up the top of second plywood (12), strengthening rib structure (13) set up first plywood (11) with between second plywood (12), the thickness of second plywood (12) is greater than the thickness of first plywood (11).

2. The battery bottom plate structure according to claim 1, characterized in that the reinforcing rib structure (13) comprises a vertical rib (131), the vertical rib (131) is vertically arranged between the first layer plate (11) and the second layer plate (12), and the vertical rib (131) is used for supporting at a longitudinal corresponding position of a gap (51) of a battery cell (5).

3. The battery bottom plate structure according to claim 1, wherein the reinforcing rib structure (13) further comprises a diagonal rib (132), and the diagonal rib (132) is obliquely arranged between the first layer plate (11) and the second layer plate (12).

4. The battery bottom plate structure according to claim 1, wherein the thickness of the first layer plate (11) is 1.6mm-1.8mm, and the thickness of the second layer plate (12) is 2.3mm-2.5mm.

5. The battery back plate structure according to any one of claims 1-4, wherein the first layer plate (11), the second layer plate (12) and the reinforcing rib structure (13) are integrally formed.

6. A battery bottom guard assembly comprising the battery bottom guard structure of any of claims 1-5.

7. The bottom protective assembly for batteries according to claim 6, further comprising a liquid-cooled plate (2), a hard buffer layer (3) and a soft buffer layer (4), wherein the hard buffer layer (3) is disposed between the liquid-cooled plate (2) and the soft buffer layer (4), and the soft buffer layer (4) is disposed between the first laminate (11) and the hard buffer layer (3).

8. The battery bottom protection assembly according to claim 7, wherein the bottom of the liquid cooling plate (2) is provided with a cooling flow channel (21), the first surface of the hard buffer layer (3) is provided with a support rib (31), and the support rib (31) and the cooling flow channel (21) are arranged in a staggered manner in the longitudinal direction.

9. A battery comprising the battery bottom guard assembly of any of claims 6-8.

10. A vehicle characterized by comprising the battery according to claim 9.

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