CN213026301U

CN213026301U - Battery pack box and battery pack with same

Info

Publication number: CN213026301U
Application number: CN202022199278.XU
Authority: CN
Inventors: 曲凡多; 瓮百川
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-04-20
Anticipated expiration: 2030-09-29

Abstract

The utility model discloses a battery package box and battery package that has it. This battery package box includes: the electric core mounting structure comprises a base plate and a plurality of cross beams, wherein the base plate is a single-layer plate and comprises a thinning portion and a thickening portion, the thickness of the thinning portion is smaller than that of the thickening portion, the thinning portion and the thickening portion are alternately arranged, the cross beams are fixed with the thickening portion, and electric core mounting points are arranged on the cross beams. According to the utility model discloses battery package box, the bottom plate is the individual layer board, through thickening part reinforcing bottom plate structural strength to provide sufficient protection to electric core, reduce bottom plate weight through the portion of reducing, and dodge out a part space, with the deformation energy-absorbing when the collision, thereby realize when reducing bottom plate occupation space, guarantee the protection to electric core of bottom plate, and then realize the space of battery package box and the balance of intensity.

Description

Battery pack box and battery pack with same

Technical Field

The utility model relates to a battery package field particularly, relates to a battery package box and battery package that has it.

Background

Electric automobile's battery package sets up in the bottom of vehicle usually, and the driving in-process will constitute serious threat to battery package's safety if take place to hold in the palm end or foreign matter striking, and the bottom plate of current battery package adopts the design of single-deck board or double-deck board usually, and single-deck board rigidity is not enough, takes place to warp easily when the striking, and double-deck board occupation space is great, and weight is heavier, is unfavorable for electric automobile's continuation of the journey.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the above-mentioned technical problem among the prior art to a certain extent at least. Therefore, the utility model provides a battery package box package when reducing bottom plate weight and occupation space, guarantees the protection to electric core of bottom plate.

The utility model also provides a battery package of having above-mentioned battery package box.

According to the utility model discloses battery package box includes: the electric core mounting structure comprises a base plate and a plurality of cross beams, wherein the base plate is a single-layer plate and comprises a thinning portion and a thickening portion, the thickness of the thinning portion is smaller than that of the thickening portion, the thinning portion and the thickening portion are alternately arranged, the cross beams are fixed with the thickening portion, and electric core mounting points are arranged on the cross beams.

According to the utility model discloses battery package box, the bottom plate is the individual layer board, through thickening part reinforcing bottom plate structural strength to provide sufficient protection to electric core, reduce bottom plate weight through the portion of reducing, and dodge out a part space, with the deformation energy-absorbing when the collision, thereby realize when reducing bottom plate occupation space, guarantee the protection to electric core of bottom plate, and then realize the space of battery package box and the balance of intensity.

According to some embodiments of the invention, the thinned portion between two adjacent thickened portions is an arch structure.

Further, the opening of the arch structure faces upward of the bottom plate.

According to some embodiments of the utility model, the thickness of thickening portion is 5mm ~ 30mm, the thickness of the thinnest department of portion that reduces is 1 ~ 10 mm.

According to the utility model discloses a some embodiments, the structure of battery package box satisfies: H/L is 0.005-0.4, wherein H is the difference between the thickness of the thickened part and the thickness of the thinnest part of the thinned part, and L is the distance between two adjacent cross beams and the fixed part of the thickened part.

According to the utility model discloses a some embodiments, the structure of battery package box satisfies: H/L is 0.02-0.06.

According to some embodiments of the invention, the junction of the thickened portion and the thinned portion is provided with a cavity structure.

According to some embodiments of the present invention, the bottom plate is formed by a plurality of base plates, each the base plate includes at least one thickening portion and a half thinning portion located on both sides of the thickening portion, adjacent two the base plate the half thinning portion butt joint forms a whole the thinning portion.

According to the utility model discloses the battery package of on the other hand embodiment, including electric core and foretell battery package box, electric core installs on the electric core mounting point.

According to the utility model discloses a battery package, bottom plate have that occupation space is little, light in weight, structural strength advantage such as higher, when electric automobile's bottom was arranged in to the battery package, if drive a vehicle in-process and hold in the palm end or foreign matter striking bottom plate, the bottom plate can protect electric core well.

According to some embodiments of the utility model, the bottom surface distance of bottom plate the distance of electricity core bottom is 5mm ~ 35 mm.

Additional aspects and advantages of the invention 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 invention.

Drawings

FIG. 1 is a schematic view of a battery pack case;

FIG. 2 is a schematic view of a base plate;

FIG. 3 is an enlarged view of FIG. 2 at A;

FIG. 4 is a schematic view of a substrate;

fig. 5 is a schematic view of a battery pack;

fig. 6 is a cross-sectional view of a battery pack;

fig. 7 is an enlarged view of fig. 6 at B.

Reference numerals:

the battery pack comprises a battery pack box body 10, a bottom plate 1, a thinned part 11, a thickened part 12, a cavity structure 13, a base plate 14, a cross beam 2, a battery pack frame 3 and a battery core 20.

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 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 exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

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

Furthermore, 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," and "fixed" are to be construed broadly and may, 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 meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The battery pack case 10 and the battery pack having the same according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Referring to fig. 1-7, a battery pack case 10 according to an embodiment of the present invention includes: the battery cell mounting structure comprises a bottom plate 1 and a plurality of cross beams 2, wherein the bottom plate 1 is a single-layer plate and comprises a thinning portion 11 and a thickened portion 12, the thickness of the thinning portion 11 is smaller than that of the thickened portion 12, the thinning portion 11 and the thickened portion 12 are arranged alternately, the cross beams 2 are fixed with the thickened portion 12, and battery cell mounting points are arranged on the cross beams 2.

Specifically, the battery pack case 10 further includes a battery pack frame 3, the battery pack frame 3 may be fixed to the bottom plate 1 to form a space for accommodating the battery cells 20, the lower end of the beam 2 is fixed to the thickened portion 12, the left and right ends of the beam 2 are fixed to the battery pack frame 3, the beam 2 and the battery pack frame 3 form a frame structure to improve the structural strength of the battery pack, the beam 2 is fixed to the thickened portion 12 to facilitate improving the structural strength of the frame structure, to reduce the deformation of the frame structure when the battery pack case 10 is impacted, to facilitate protecting the battery cells 20 mounted on the battery cell mounting points, the thickness of the thinned portion 11 is small to facilitate reducing the weight of the battery pack case 10, and the thinned portion 11 may deform to absorb energy when impacted, to facilitate reducing the deformation of the frame structure to protect the battery cells 20, in addition, the battery pack case 10 has a plurality of beams 2 to space the plurality of battery cells 20 in the battery pack, the thinned portions 11 and the thickened portions 12 are arranged alternately, the number of the thickened portions 12 may be the same as the number of the cross beams 2, the thinned portions 11 being located between two thickened portions 12.

It should be noted that, bottom plate 1 can adopt the extrusion section bar, and bottom plate 1's profile can follow the shape with frame construction's shape to at bottom plate 1 and frame construction fixed back, the space that holds electric core 20 can realize sealedly, and bottom plate 1's periphery can have extra frame, in order being suitable for to be fixed bottom plate 1 with the automobile body of vehicle, in addition, the utility model discloses bottom plate 1 and frame construction can adopt one or more fixed mode such as welding, bolted connection, gluing agent connection, can set up fixed cooperation structures such as corresponding through-hole, screw hole, groove simultaneously on bottom plate 1.

According to the utility model discloses battery package box 10, bottom plate 1 is the individual layer board, through the 1 structural strength of thickening portion 12 reinforcing bottom plate, in order to provide sufficient protection to electric core 20, reduce bottom plate 1 weight through thinning portion 11, and dodge out a part space, in order to the energy-absorbing of deformation when the collision, thereby realize when reducing bottom plate 1 occupation space, guarantee bottom plate 1's protection to electric core 20, and then realize the space of battery package box 10 and the balance of intensity.

Referring to fig. 3, 5 and 7, the thinned portion 11 between two adjacent thickened portions 12 is an arch structure, and when the thinned portion 11 of the arch structure is impacted, the impact force can be uniformly transmitted to the thickened portions 12 on both sides, so that the structural strength of the thinned portion 11 is improved, and the maintenance cost is reduced.

Referring to fig. 5, the opening of the arch structure faces the upper side of the base plate 1, that is, the opening of the arch structure faces the battery cell 20, and an escape space is formed between the thinning portion 11 and the battery cell 20, so that when the thinning portion 11 is deformed by an impact, damage of the thinning portion 11 to the battery cell 20 is reduced.

In some embodiments not shown in the drawings, the opening of the arch structure faces downward of the bottom plate 1, that is, the opening of the arch structure faces away from the battery cell 20, so that the thinned portion 11 is recessed toward the space inside the battery pack case 10 relative to the thickened portion 12, thereby facilitating reduction of the probability that the thinned portion 11 is impacted by external impact, and further facilitating reduction of maintenance cost.

Referring to fig. 7, the thickness c of the thickened portion 12 is 5mm to 30mm, for example 12mm, and the thickness d of the thinnest portion of the thinned portion 11 is 1 mm to 10mm, for example 2 mm.

Referring to fig. 7, the structure of the battery pack case 10 satisfies: H/L is 0.005 ~ 0.4, wherein, H is the difference of thickness c of thickened portion 12 and thinnest department thickness d of portion 11 that reduces thickness, L is the distance of two adjacent crossbeams 2 and the fixed department of thickened portion 12, and the ratio of H and L satisfies 0.005 ~ 0.4 can guarantee the bearing capacity of domes, makes the portion 11 that reduces thickness receive the striking, transmits the striking power to thickened portion 12 of both sides effectively to promote the structural strength of portion 11 that reduces thickness, and then is favorable to reducing cost of maintenance.

Preferably, the structure of the battery pack case 10 satisfies: H/L is 0.02-0.06, so that the structural strength of the thinning part 11 is improved.

In one embodiment, when H/L is 0.05, and the distance between two adjacent beams 2 and the fixed position of the thickened portion 12 is 200mm, the difference between the thickness c of the thickened portion 12 and the thickness d of the thinnest portion of the thinned portion 11 is 10 mm.

Referring to fig. 3 and 7, a cavity structure 13 is provided at the junction of the thickened portion 12 and the thinned portion 11, so as to reduce the weight of the bottom plate 1 and save the cost.

Referring to fig. 2-4, the bottom plate 1 is formed by splicing a plurality of base plates 14, and optionally, the bottom plate 1 is formed by splicing and welding a plurality of base plates 14, so as to facilitate reducing the processing difficulty of the bottom plate 1, each base plate 14 includes at least one thickened portion 12 and half thinned portions located at two sides of the thickened portion 12, and the half thinned portions of two adjacent base plates 14 are butted to form a whole thinned portion 11.

In some embodiments not shown in the figures, each base plate 14 comprises at least one thinned portion 11 and a fixing portion on one side of the thinned portion 11 to realize integral molding of the arch structure, thereby being beneficial to ensure the shape accuracy of the arch structure, so that the thinned portion 11 can effectively transmit the impact force to the thickened portions 12 on both sides when the thinned portion 11 is impacted.

Referring to fig. 1 to 7, a battery pack according to another embodiment of the present invention includes a battery cell 20 and the battery pack case 10 of the above embodiment, wherein the battery cell 20 is mounted on a battery cell mounting point.

According to the utility model discloses a battery package, bottom plate 1 have occupation space little, light in weight, structural strength advantage such as higher, when electric automobile's bottom was arranged in to the battery package, if the driving in-process holds in the palm the end or when foreign matter striking bottom plate 1, bottom plate 1 can protect electric core 20 well.

Specifically, when foreign matter impacts on the thinned portion 11 and the impact force is light, the thinned portion 11 of the arch structure can uniformly transmit the impact force to the thickened portions 12 on both sides without deformation, thereby facilitating reduction of maintenance cost;

when foreign matters impact on the thinning part 11 and the impact force is heavy, an avoidance space is formed between the thinning part 11 of the arch structure and the battery cell 20, so that the thinning part 11 can be prevented from invading the battery cell 20 during collapse and energy absorption, and the safety of the battery cell 20 is ensured;

when foreign matter impinges on the thickened portion 12, the thicker material of the thickened portion 12 has sufficient strength to avoid deformation of the battery pack case 10.

Referring to fig. 7, the bottom surface of the base plate 1 is spaced from the bottom of the battery cell 20 by a distance e of 5mm to 35mm, for example, 17mm, so as to form an escape space between the thinned portion 11 and the battery cell 20, thereby reducing damage of the thinned portion 11 to the battery cell 20 when the thinned portion 11 is deformed by impact.

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 invention. 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, 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 without departing from the scope of the present invention.

Claims

1. A battery pack case, comprising:

bottom plate (1) and a plurality of crossbeam (2), bottom plate (1) are the single layer board and including attenuate portion (11) and thickening portion (12), the thickness of attenuate portion (11) is less than the thickness of thickening portion (12), attenuate portion (11) with thickening portion (12) are arranged in turn, crossbeam (2) with thickening portion (12) are fixed, be equipped with electric core mounting point on crossbeam (2).

2. The battery pack case according to claim 1, wherein the thinned portion (11) between adjacent two of the thickened portions (12) is of an arch structure.

3. The battery pack case according to claim 2, wherein the opening of the arch structure is directed upward of the bottom plate (1).

4. The battery pack case according to claim 1, wherein the thickness of the thickened portion (12) is 5 to 30mm, and the thickness of the thinnest portion of the thinned portion (11) is 1 to 10 mm.

5. The battery pack case according to claim 2, wherein the battery pack case (10) has a structure satisfying: H/L is 0.005-0.4, wherein H is the difference between the thickness of the thickened part (12) and the thickness of the thinnest part of the thinned part (11), and L is the distance between the two adjacent cross beams (2) and the fixing part of the thickened part (12).

6. The battery pack case according to claim 5, wherein the battery pack case (10) has a structure satisfying: H/L is 0.02-0.06.

7. The battery pack case according to claim 1, wherein a cavity structure (13) is provided at the junction of the thickened portion (12) and the thinned portion (11).

8. The battery pack case according to claim 1, wherein the bottom plate (1) is formed by splicing a plurality of base plates (14), each base plate (14) comprises at least one thickened portion (12) and half thinned portions on both sides of the thickened portion (12), and the half thinned portions of two adjacent base plates (14) are butted to form a whole thinned portion (11).

9. A battery pack, characterized by comprising a battery cell (20) and the battery pack case (10) of any of claims 1-8, the battery cell (20) being mounted on the cell mounting point.

10. The battery pack according to claim 9, wherein the bottom surface of the base plate (1) is located at a distance of 5mm to 35mm from the bottom of the battery cell (20).