CN219959217U - Battery pack - Google Patents

Abstract

The utility model relates to the technical field of batteries, in particular to a battery pack which comprises a box body and a battery, wherein the box body comprises a plurality of frames, the frames enclose a cavity of the box body, the battery is accommodated in the cavity, the frames are formed by rolling a sheet material integrally and are provided with welding gaps, and the welding gaps are positioned in the battery pack. Through the structural design, the welding gap of the frame can be prevented from being positioned outside the battery pack, so that the frame is prevented from generating air leakage through the welding gap, and the overall tightness of the battery pack is improved.

Description

Battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery pack.

Background

In the design scheme of current battery package, when the frame adopts a sheet material and via roll-in and integrated into one piece, have the welding gap between two connecting end of this sheet material along the roll-in direction via the welding, this welding gap is located the lateral surface of frame, leads to there is the gas leakage hidden danger in welding gap department, reduces the holistic leakproofness of battery package.

Disclosure of Invention

It is therefore one of the primary objects of the present utility model to overcome at least one of the above-mentioned drawbacks of the prior art, and to provide a battery pack that avoids the risk of air leakage at the weld seam of the integrally rolled rim.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

according to one aspect of the utility model, a battery pack is provided, wherein the battery pack comprises a box body and a battery, the box body comprises a plurality of side frames, the side frames enclose a cavity of the box body, the battery is accommodated in the cavity, the side frames are formed by rolling a sheet material integrally and are provided with welding gaps, and the welding gaps are positioned inside the battery pack.

According to the technical scheme, the battery pack provided by the utility model has the advantages and positive effects that:

the box body of the battery pack comprises a plurality of frames, the frames enclose a cavity of the box body, the battery is accommodated in the cavity, the frames are formed integrally by rolling a sheet material and are provided with welding gaps, and the welding gaps are positioned in the battery pack. Through the structural design, the welding gap of the frame can be prevented from being positioned outside the battery pack, so that the frame is prevented from generating air leakage through the welding gap, and the overall tightness of the battery pack is improved.

Drawings

Various objects, features and advantages of the present utility model will become more apparent from the following detailed description of the preferred embodiments of the utility model, when taken in conjunction with the accompanying drawings. The drawings are merely exemplary illustrations of the utility model and are not necessarily drawn to scale. In the drawings, like reference numerals refer to the same or similar parts throughout. Wherein:

fig. 1 is a schematic perspective view illustrating a case of a battery pack according to an exemplary embodiment;

FIG. 2 is a schematic perspective view of the bezel shown in FIG. 1;

FIG. 3 is a partial cross-sectional view of the battery pack shown in FIG. 1;

fig. 4 to 8 are partial cross-sectional views of battery packs according to other exemplary embodiments, respectively.

The reference numerals are explained as follows:

100. a case;

101. a cavity;

110. a frame;

111. a top wall;

112. a bottom wall;

113. an inner sidewall;

1131. a boss;

114. an outer sidewall;

115. reinforcing ribs;

117. a glue layer;

118. a glue layer;

120. assembling a structure;

130. a case cover;

131. a first connector;

140. a bottom plate;

141. a second connector;

200. a battery;

a. a first connection end;

b. a first connection end;

G. welding the gap;

H1. a height difference;

H2. height of the steel plate;

o, center line;

s1, a first surface;

s2, a second surface.

Detailed Description

Exemplary embodiments that embody features and advantages of the present utility model are described in detail in the following description. It will be understood that the utility model is capable of various modifications in various embodiments, all without departing from the scope of the utility model, and that the description and drawings are intended to be illustrative in nature and not to be limiting.

In the following description of various exemplary embodiments of the utility model, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary structures, systems, and steps in which aspects of the utility model may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized and structural and functional modifications may be made without departing from the scope of the present utility model. Moreover, although the terms "over," "between," "within," and the like may be used in this description to describe various exemplary features and elements of the utility model, these terms are used herein for convenience only, e.g., in terms of the orientation of the examples depicted in the drawings. Nothing in this specification should be construed as requiring a particular three-dimensional orientation of the structure in order to fall within the scope of the utility model.

Referring to fig. 1, a schematic perspective view of a case 100 of a battery pack according to the present utility model is representatively illustrated. In this exemplary embodiment, the battery pack according to the present utility model is described by taking an in-vehicle battery as an example. Those skilled in the art will readily appreciate that many modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to adapt the relevant designs of the present utility model to other types of battery devices, and such changes are still within the scope of the battery package presented by the present utility model.

As shown in fig. 1, in an embodiment of the present utility model, a battery pack according to the present utility model includes a case 100 and a battery 200 (not shown in fig. 1). Referring to fig. 2 and 3 in combination, a schematic perspective view of the bezel 110 is representatively illustrated in fig. 2; a partial cross-sectional view of the battery pack is representatively illustrated in fig. 3, in which the cross-sectional structure of the battery pack at the junction of the frame 110 and the battery 200 is specifically illustrated. The structure, connection manner and functional relationship of the main components of the battery pack according to the present utility model will be described in detail with reference to the above drawings.

As shown in fig. 1 to 3, in an embodiment of the present utility model, the case 100 includes a plurality of frames 110, the frames 110 enclose a cavity 101 of the case 100, and the battery 200 is accommodated in the cavity 101. The frame 110 is a sheet material integrally formed by rolling and has a welding gap G, and the welding gap G is located inside the battery pack. Through the structural design, the welding gap G of the frame 110 can be prevented from being positioned outside the battery pack, so that the frame 110 is prevented from generating air leakage through the welding gap G, and the overall tightness of the battery pack is improved.

As shown in fig. 3, in an embodiment of the present utility model, the welding gap G may be located on an inner side of the frame 110 facing the battery 200, for example, the welding gap G is located on an outer surface of the inner sidewall 113 of the frame 110 (i.e., a surface of the inner sidewall 113 facing the battery 200), thereby locating the welding gap G inside the battery pack.

As shown in fig. 3, in an embodiment of the present utility model, a gap may be provided between the inner side surface of the frame 110 and the battery 200, and a glue layer 117 may be disposed in the gap, and the glue layer 117 bonds the frame 110 and the battery 200. Through the structural design, the connection strength of the frame 110 and the battery 200 can be enhanced by using the adhesive layer 117, so that the overall structural strength of the battery pack is further improved. In addition, since the adhesive layer 117 also covers the welding gap G, the present utility model can also reinforce the connection strength of the frame 110 at the welding gap G by using the adhesive layer 117. Compared with the welding gap G arranged on the outer side surface of the frame 110, the utility model can avoid that the welding gap G is exposed outside the battery pack so that foreign matters enter the inner cavity of the frame 110 through the welding gap G. Compared with the arrangement of the welding gap G on the top surface or the bottom surface of the frame 110, the utility model can utilize the side surface with larger area to arrange the welding gap G, thereby reducing the processing difficulty of the beam structure.

Referring to fig. 4, a partial cross-sectional view of a battery pack embodying principles of the present utility model is representatively illustrated in fig. 4, in another exemplary embodiment, particularly illustrating the cross-sectional configuration of the battery pack at the junction of the frame 110 and the battery 200.

As shown in fig. 4, in an embodiment of the present utility model, the frame 110 is formed with an inner cavity, two first connection ends a, b of the plate along the rolling direction are respectively bent and welded to the inner cavity, the frame 110 has a top wall 111, a bottom wall 112, and an inner side wall 113 and an outer side wall 114 connected between the top wall 111 and the bottom wall 112, and an inner side surface of the frame 110 is an outer surface of the inner side wall 113. On this basis, a first connecting end b extends and is connected to the inner surface of the outer side wall 114, which first connecting end b forms a reinforcement rib 115 in the inner cavity. With the above structural design, the present utility model can strengthen the structural strength of the frame 110 by forming the reinforcing ribs 115 by the first connection end b. In some embodiments, the frame 110 may also employ two first connecting ends a, b that extend and are connected to the inner surface of the outer sidewall 114 to form the rib 115 together, which is not limited to the present embodiment. Of course, compared to the two first connection ends a, b together forming the reinforcing rib 115, in the present embodiment, only one first connection end b is used to form the reinforcing rib 115, which can further reduce the weight of the frame 110 and facilitate the lightweight design of the battery pack.

Referring to fig. 5, a partial cross-sectional view of a battery pack embodying principles of the present utility model is representatively illustrated in fig. 5 in another exemplary embodiment, particularly illustrating the cross-sectional configuration of the battery pack at the junction of the frame 110 and the battery 200.

As shown in fig. 5, taking still a structural design in which at least one of the two first connection ends a, b (for example, the first connection end b) forms the reinforcing rib 115 as an example, in an embodiment of the present utility model, the outer side surface of the frame 110 may be provided with a fitting structure 120, and the fitting structure 120 is used for being in lifting engagement with a lifting device. On this basis, the center line O of the fitting structure 120 may be located below the reinforcing bars 115 in the height direction. When the assembly structure 120 (particularly, when the assembly structure is integrally formed by rolling) is fixed to the outer surface of the outer wall of the frame 110 by welding, if the welding gap G of the frame 110 is located on the outer surface of the outer wall, the welding area on the outer surface of the outer wall is too large, which may reduce the structural strength of the frame 110 and may generate deformation. Through the structural design, the welding seam G of the frame 110, the assembly structure 120 and the welding area of the frame 110 can be prevented from being positioned on the same side face of the frame 110, so that the structural strength of the frame 110 is ensured, and deformation is avoided.

As shown in fig. 5, based on the structural design that the center line O of the assembly structure 120 along the height direction is located below the reinforcing rib 115, in an embodiment of the present utility model, the ratio of the height difference H1 between the center line O of the assembly structure 120 and the reinforcing rib 115 in the height direction in the height H2 of the frame 110 may be less than or equal to 0.4, for example, 0.1, 0.2, 0.3, 0.35, 0.4, etc. Because the assembly structure 120 is a stress position of the battery pack in the hoisting process, the special design of the height ratio can avoid that the torsion force applied to the joint of the first connecting end part and the inner side wall 113 is large due to the fact that the height difference H1 between the central line O of the assembly structure 120 and the reinforcing rib 115 is too small, and the frame 110 is prevented from deforming. In some embodiments, the ratio of the height difference H1 between the center line O of the assembly structure 120 and the rib 115 in the height H2 of the frame 110 may be greater than 0.4, for example, 0.41, etc., which is not limited to this embodiment.

Referring to fig. 6, a partial cross-sectional view of a battery pack capable of embodying principles of the present utility model is representatively illustrated in fig. 6 in another exemplary embodiment, in which the cross-sectional structure of the battery pack at the junction of the frame 110 and the battery 200 is specifically illustrated.

As shown in fig. 6, the lower portion of the bezel 110 may have a protrusion 1131 protruding toward the battery 200 such that an inner side surface of the bezel 110 (e.g., an outer surface of the inner side wall 113) has a first surface S1 and a second surface S2 that are parallel, for example, the protrusion 1131 may be formed protruding toward the battery 200 via the lower portion of the inner side wall 113 of the bezel 110. The first surface S1 is a portion of the inner side surface above the protrusion 1131, and the second surface S2 may be a surface of the protrusion 1131 facing the battery 200. On this basis, the first surface S1 is not in contact with the battery 200, and the welding gap G of the frame 110 is located on the first surface S1. Through the above structural design, the positioning of the battery 200 can be realized by using the convex portion 1131 contacting with the battery 200, and meanwhile, the welding gap G of the frame 110 is ensured to avoid the convex portion 1131 and be positioned on the first surface S1 which is not contacted with the battery 200, so that the structural stability of the battery 200 is further improved on the basis of ensuring that the battery 200 is not contacted with the welding gap G.

As shown in fig. 6, based on the structural design that the lower portion of the frame 110 has the protrusion 1131, in an embodiment of the present utility model, a gap is provided between the first surface S1 of the frame 110 and the battery 200, and a glue layer 118 is disposed in the gap, and the glue layer 118 bonds the frame 110 and the battery 200. Through the structural design, the connection strength between the frame 110 and the battery 200 can be enhanced by using the adhesive layer 118, so that the overall structural strength of the battery pack is further improved. In addition, since the adhesive layer 118 also covers the welding gap G, the present utility model can also enhance the connection strength and sealing property at the welding gap G of the frame 110 by using the adhesive layer 118.

Referring to fig. 7, a partial cross-sectional view of a battery pack embodying principles of the present utility model is representatively illustrated in fig. 7 in another exemplary embodiment, particularly illustrating the cross-sectional configuration of the battery pack at the junction of the frame 110 and the battery 200.

In contrast to the embodiment shown in fig. 3, which uses a structure in which the welding gap G is located on the inner side of the rim 110, as shown in fig. 7, in an embodiment of the present utility model, the welding gap G may be located on the top surface of the rim 110, that is, the top surface of the top wall 111 of the rim 110. On this basis, the cover 130 of the case 100 may be coupled to the top surface of the frame 110 via the first coupling member 131, and the welding gap G of the frame 110 may be located at a side of the first coupling member 131 adjacent to the battery 200. On the other hand, the welding gap G at the top of the frame 110, that is, the inner portion of the battery pack, is located due to the cover 130. Through the above structural design, the utility model can cover the welding gap G by using the case cover 130 on the basis of ensuring that the battery 200 is not contacted with the welding gap G, thereby further improving the structural stability of the battery pack. Further, a gasket may be disposed between the top surface of the frame 110 and the case cover 130 to close the gap G, so as to ensure tightness of the battery pack.

Referring to fig. 8, a partial cross-sectional view of a battery pack embodying principles of the present utility model is representatively illustrated in fig. 8, in another exemplary embodiment, particularly illustrating the cross-sectional configuration of the battery pack at the junction of the frame 110 and the battery 200.

In contrast to the embodiment shown in fig. 3, which uses a structure in which the welding gap G is located on the inner side of the rim 110, as shown in fig. 8, in an embodiment of the present utility model, the welding gap G may be located on the bottom surface of the rim 110, that is, the bottom surface of the bottom wall 112 of the rim 110. On this basis, the bottom plate 140 of the case 100 may be coupled to the bottom surface of the frame 110 via the second coupling member 141, and the welding gap G of the frame 110 may be located at one side of the second coupling member 141 near the battery 200. On the other hand, the bottom plate 140 is disposed such that the welding gap G at the bottom of the frame 110 is located at the inner portion of the battery pack. Through the above structural design, the utility model can cover the welding gap G by the bottom plate 140 on the basis of ensuring that the battery 200 is not contacted with the welding gap G, thereby further improving the structural stability of the battery pack. Further, a gasket may be disposed between the bottom surface of the frame 110 and the bottom plate 140 to close the gap G, so as to ensure tightness of the battery pack.

It should be noted herein that the battery packs shown in the drawings and described in this specification are only a few examples of the wide variety of battery packs that can employ the principles of the present utility model. It should be clearly understood that the principles of the present utility model are in no way limited to any details or any components of the battery pack shown in the drawings or described in the present specification.

In summary, the case 100 of the battery pack according to the present utility model includes a plurality of frames 110, the plurality of frames 110 enclose the cavity 101 of the case 100, the battery 200 is accommodated in the cavity 101, the frames 110 are formed integrally by rolling a sheet material and have welding gaps G, and the welding gaps G are located inside the battery pack. Through the structural design, the welding gap G of the frame 110 can be prevented from being positioned outside the battery pack, so that the frame 110 is prevented from generating air leakage through the welding gap G, and the overall tightness of the battery pack is improved.

Exemplary embodiments of the battery pack according to the present utility model are described and/or illustrated in detail above. Embodiments of the utility model are not limited to the specific embodiments described herein, but rather, components and/or steps of each embodiment may be utilized independently and separately from other components and/or steps described herein. Each component and/or each step of one embodiment may also be used in combination with other components and/or steps of other embodiments. When introducing elements/components/etc. that are described and/or illustrated herein, the terms "a," "an," and "the" are intended to mean that there are one or more of the elements/components/etc. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements/components/etc., in addition to the listed elements/components/etc. Furthermore, the terms "first" and "second" and the like in the claims and in the description are used for descriptive purposes only and not for numerical limitation of their subject matter.

While the utility model has been described in terms of various specific embodiments, those skilled in the art will recognize that the utility model can be practiced with modification within the spirit and scope of the claims.

Claims (9)

1. The utility model provides a battery package, its characterized in that includes box and battery, the box includes a plurality of frames, and a plurality of the frame encloses the cavity of box, the battery hold in the cavity, the frame is a panel and through roll-in integrated into one piece and have welding gap, welding gap is located inside the battery package.

2. The battery pack of claim 1, wherein the weld seam is located on an inside surface of the rim that faces the battery.

3. The battery pack according to claim 2, wherein the frame is formed with an inner cavity, two first connection ends of the plate material in the rolling direction are respectively bent toward the inner cavity and welded, the frame has a top wall, a bottom wall, and an inner side wall and an outer side wall connected between the top wall and the bottom wall, and an inner side surface of the frame is an outer surface of the inner side wall; wherein at least one of the first connection ends extends and connects to an inner surface of the outer sidewall, the first connection end forming a stiffener in the lumen.

4. A battery pack according to claim 3, wherein the outer side of the frame is provided with an assembly structure for lifting engagement with a lifting device; and the central line of the assembly structure is positioned below the reinforcing ribs along the height direction.

5. The battery pack according to claim 4, wherein a ratio of a height difference between a center line of the fitting structure and the reinforcing rib in a height of the frame in a height direction is less than or equal to 0.4.

6. The battery pack according to claim 2, wherein a lower portion of the frame has a boss protruding toward the battery such that an inner side surface of the frame has a first surface and a second surface in parallel, the first surface being a portion of the inner side surface above the boss, the second surface being a surface of the boss facing the battery; wherein the first surface is not in contact with the battery, and the welding slit is located on the first surface.

7. The battery pack of claim 6, wherein a gap is provided between the first surface and the battery, and wherein a glue layer is disposed in the gap, the glue layer bonding the frame and the battery.

8. The battery pack of claim 1, wherein the welding slit is located at a top surface of the frame, the case cover of the case is connected to the top surface of the frame via a first connecting member, and the welding slit is located at a side of the first connecting member adjacent to the battery.

9. The battery pack of claim 1, wherein the welding slit is located at a bottom surface of the frame, the bottom plate of the case is connected to the bottom surface of the frame via a second connecting member, and the welding slit is located at a side of the second connecting member adjacent to the battery.