CN219144329U - 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 plurality of cylindrical batteries, wherein the cylindrical batteries are arranged in the box body, a positioning piece is arranged on the inner side surface of at least one side wall of the box body, the positioning piece is positioned between the cylindrical batteries and the side wall, the positioning piece is provided with a cavity, the cavity penetrates through the top and the bottom of the positioning piece, a reinforcing structure is arranged in the cavity, the cavity is divided into a plurality of pore channels by the reinforcing structure, and the extending direction of the pore channels is perpendicular to the bottom of the box body. Through the structural design, the anti-collision capacity of the battery pack can be improved, and the damage to the cylindrical battery caused by collision of the side surface of the battery pack in use or collision test is avoided. Meanwhile, as the reinforcing structure is arranged in the cavity of the positioning piece to form the pore canal, partial deformation of the positioning piece can be realized when the positioning piece is impacted, and direct collision to the cylindrical battery is avoided on the basis of providing deformation meeting the requirement of an impact test.

Description

Battery pack

Technical Field

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

Background

For the battery pack of the existing cylindrical battery, when the battery pack is bumped in the processing, storage and use environments of the battery pack or the battery pack is bumped in a collision test, the impact force can be transmitted to the cylindrical battery through the box body, so that the cylindrical battery is damaged due to the large impact force.

Disclosure of Invention

It is a primary object 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 having improved impact resistance and satisfying the case shape variation requirements.

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

according to one aspect of the utility model, there is provided a battery pack, comprising a case and a plurality of cylindrical batteries, wherein the cylindrical batteries are arranged in the case, a positioning member is arranged on the inner side surface of at least one side wall of the case, the positioning member is positioned between the cylindrical batteries and the side wall, the positioning member is provided with a cavity, the cavity penetrates through the top and the bottom of the positioning member, a reinforcing structure is arranged in the cavity, the reinforcing structure divides the cavity into a plurality of pore channels, and the extending direction of the pore channels is perpendicular to the bottom of the case.

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

the battery pack is characterized in that a positioning piece is arranged between a cylindrical battery and the side wall of a box body, the positioning piece is provided with a cavity penetrating through the top and the bottom, a reinforcing structure is arranged in the cavity, the cavity is divided into a plurality of pore channels by the reinforcing structure, and the extending direction of the pore channels is perpendicular to the bottom of the box body. Through the structural design, the anti-collision capacity of the battery pack can be improved, and the damage to the cylindrical battery caused by collision of the side surface of the battery pack in use or collision test is avoided. Meanwhile, as the reinforcing structure is arranged in the cavity of the positioning piece to form the pore canal, partial deformation of the positioning piece can be realized when the positioning piece is impacted, and direct collision to the cylindrical battery is avoided on the basis of providing deformation meeting the requirement of an impact test.

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 partial structure of a battery pack according to an exemplary embodiment;

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

FIG. 3 is an enlarged partial schematic view of the positioning member shown in FIG. 2;

FIG. 4 is a schematic view of the deformation trend of the positioning member shown in FIG. 2 when impacted;

fig. 5 is a partially enlarged schematic illustration of a positioning member of a battery pack according to another exemplary embodiment;

FIG. 6 is a schematic view of the deformation trend of the positioning member shown in FIG. 5 when impacted;

fig. 7 is a partially enlarged schematic illustration of a positioning member of a battery pack according to still another exemplary embodiment;

FIG. 8 is a partial top view of the positioning member shown in FIG. 7;

fig. 9 is a partially enlarged schematic view of a part of the structure of a battery pack according to an exemplary embodiment.

The reference numerals are explained as follows:

100. a case;

110. a sidewall;

120. a bottom plate;

200. a cylindrical battery;

300. a positioning piece;

310. a duct;

320. reinforcing ribs;

321. a straight portion;

322. an arc-shaped portion;

330. a honeycomb structure;

331. honeycomb holes;

341. a first wall;

3411. a simulated groove;

3412. a convex portion;

342. a second wall;

400. a battery bracket;

410. a receiving chamber;

D1. an aperture;

D2. spacing.

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 part of the structure 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 as being applied to a vehicle-mounted battery. 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 remain within the principles of the battery packs presented herein.

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 plurality of cylindrical batteries 200, and the cylindrical batteries 200 are disposed in the case 100. Referring to fig. 2-4 in conjunction, an enlarged schematic view of portion a of fig. 1 is representatively illustrated in fig. 2;

a partial enlarged schematic view of the positioning member 300 is representatively illustrated in fig. 3; a schematic representation of the deformation tendency of the spacer 300 upon impact is representatively illustrated in fig. 4. 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 and 2, in an embodiment of the present utility model, the inner side of at least one sidewall 110 of the case 100 is provided with a positioning member 300, and the positioning member 300 is located between the cylindrical battery 200 and the sidewall 110. It should be noted that, fig. 1 and 2 hide the partial cylindrical battery 200 adjacent to the positioning member 300 for the convenience of viewing and understanding the structure of the positioning member 300. The positioning member 300 has a cavity, the cavity penetrates through the top and the bottom of the positioning member 300, and a reinforcing structure is disposed in the cavity, the reinforcing structure divides the cavity into a plurality of channels 310, and the extending direction of the channels 310 is perpendicular to the bottom of the case 100 (for example, the bottom plate 120 of the case 100), that is, the channels 310 also penetrate through the top and the bottom of the positioning member 300. Through the structural design, the anti-collision capacity of the battery pack can be improved, and the damage to the cylindrical battery 200 when the side surface of the battery pack is impacted in use or in a collision test is avoided. Meanwhile, the hole channel 310 is formed by the reinforcing structure in the cavity of the positioning piece 300, so that the positioning piece 300 can realize partial deformation when impacted, and the positioning piece 300 can avoid directly impacting the cylindrical battery 200 on the basis of providing the deformation quantity meeting the impact test requirement.

As shown in fig. 2 and 3, in one embodiment of the present utility model, the reinforcing structure may include reinforcing ribs 320. Through the above structural design, the present utility model can provide supporting and buffering functions by using the reinforcing ribs 320, as shown in fig. 4, for example, when the wall (for example, the second wall 342 described below) on the outer side (the side facing away from the cylindrical battery 200) of the positioning member 300 is pressed and deformed inwards, the reinforcing ribs 320 can bend to provide buffering, and the wall on the outer side (the side facing toward the cylindrical battery 200) of the positioning member 300 is prevented from directly contacting the wall (for example, the first wall 341 described below) on the inner side, thereby preventing the cylindrical battery 200 from being damaged, and meeting the deformation requirement required in the impact test, for example.

As shown in fig. 2 and 3, based on the structural design that the reinforcing structure includes the reinforcing ribs 320, in an embodiment of the present utility model, for one positioning member 300, the reinforcing ribs 320 disposed in the cavity thereof may extend in a direction perpendicular to the inner side surface of the sidewall 110 of the case 100 where the positioning member 300 is disposed. Through the above structural design, the present utility model can further optimize the supporting and buffering effects provided by the reinforcing rib 320 during impact deformation. In some embodiments, the ribs 320 may also have a relative inclination angle (and not parallel, i.e. not 0 and 180 °) with the inner side surface of the sidewall 110, not limited to the embodiment.

Referring to fig. 5 and 6, a partial enlarged schematic view of a positioning member 300 of a battery pack in another exemplary embodiment consistent with the principles of the present utility model is representatively illustrated in fig. 5; a schematic diagram of the deformation tendency of the positioning member 300 shown in fig. 5 upon impact is representatively illustrated in fig. 6.

As shown in fig. 5 and 6, in an embodiment of the present utility model, the reinforcing structure is still taken as a reinforcing rib 320, and the reinforcing rib 320 is designed as an example and extends along a direction perpendicular to the inner side surface of the side wall 110, the positioning member 300 may have a plurality of walls, which enclose the cavity of the positioning member 300, and the plurality of walls includes a first wall 341 and a second wall 342. The first wall 341 and the second wall 342 are parallel to the sidewall 110 of the positioning member 300, and the first wall 341 and the second wall 342 are spaced apart along a direction perpendicular to the inner side of the sidewall 110. On this basis, the reinforcing rib 320 may have an arc portion 322 and two straight portions 321, wherein one straight portion 321 is connected between one end of the arc portion 322 and the first wall 341, and wherein the other straight portion 321 is connected between the other end of the arc portion 322 and the second wall 342. Through the above structural design, the present utility model can further optimize the cushioning effect provided by the stiffener 320 by using the arc portion 322, as shown in fig. 6, for example, when the stiffener 320 is impacted, the second wall 342 of the positioning member 300 is pressed and deformed inwards, the stiffener 320 can bend at the position of the arc portion 322 to provide the cushioning effect, so that the second wall 342 of the positioning member 300 is prevented from directly contacting the first wall 341, thereby preventing the cylindrical battery 200 from being damaged, and meanwhile, the deformation requirement required in the impact test can be met.

As shown in fig. 3 or 5, in some embodiments of the present utility model, taking the case that the positioning member 300 has the first wall 341 facing the cylindrical battery 200 as an example, the surface of the first wall 341 facing the cylindrical battery 200 may be concave to form a profile groove 3411, and the profile groove 3411 is matched with a part of the shape of the side surface of the cylindrical battery 200, and the positioning member 300 can receive a part of the cylindrical battery 200 by using the profile groove 3411. Through the structural design, the positioning device can improve the positioning effect of the positioning piece 300 on the cylindrical battery 200, and is beneficial to reducing space occupation. In some embodiments, the first wall 341 of the positioning element 300 may also have a planar structure, which is not limited to the above embodiments.

As shown in fig. 3 or fig. 5, based on the structural design of forming the profiling groove 3411 on the first wall 341 of the positioning member 300, in some embodiments of the present utility model, a surface of the first wall 341 of the positioning member 300 facing the side wall 110 of the case 100 where the positioning member 300 is located (i.e., an inner surface of the first wall 341) may have a convex portion 3412, where the convex portion 3412 is located between two adjacent profiling grooves 3411. The positioning member 300 further has a second wall 342, and the second wall 342 is disposed parallel to the first wall 341 at a distance and participates in forming a cavity together, and the positioning member 300 is disposed on the inner side of the side wall 110 via the second wall 342. On this basis, when the reinforcing structure includes the reinforcing rib 320, one end of the reinforcing rib 320 may be connected to the second wall 342, and the other end of the reinforcing rib 320 may be connected to the convex portion 3412 of the first wall 341. Through the above structural design, the supporting and buffering effects of the positioning member 300 can be further optimized.

As shown in fig. 3 or fig. 5, based on the structural design that the other end of the reinforcing rib 320 is connected to the convex portion 3412, in an embodiment of the present utility model, when the first wall 341 of the positioning member 300 is formed with at least three profiling grooves 3411, that is, when the surface of the first wall 341 facing the side wall 110 has at least two convex portions 3412, the reinforcing structure may include at least two reinforcing ribs 320, and each convex portion 3412 is connected with one reinforcing rib 320. Through the structural design, the supporting and buffering functions of the positioning piece 300 can be further optimized, and meanwhile, the stress deformation of the positioning piece 300 when the positioning piece is impacted and pressed can be more uniform.

Referring to fig. 7 and 8, a partial enlarged schematic view of a positioning member 300 of a battery pack in another exemplary embodiment consistent with the principles of the present utility model is representatively illustrated in fig. 7; a partial top view of the spacer 300 shown in fig. 7 is representatively illustrated in fig. 8.

As shown in fig. 7 and 8, in an embodiment of the present utility model, the reinforcement structure may also include a honeycomb structure 330, and the honeycomb holes 331 of the honeycomb structure 330 define the channels 310 of the positioning member 300. Through the structural design, the utility model can further optimize the supporting and buffering functions of the positioning piece 300, and can lead the stress of the positioning piece 300 to be more uniform when the impact is pressed.

As shown in fig. 7 and 8, based on the structural design in which the reinforcing structure includes the honeycomb structure 330, in an embodiment of the present utility model, the positioning member 300 has a plurality of walls that enclose the cavity of the positioning member 300, and the plurality of walls includes a first wall 341 and a second wall 342. The first wall 341 and the second wall 342 are parallel to the side wall 110 of the case 100 where the positioning member 300 is located, and the first wall 341 and the second wall 342 are spaced apart along a direction perpendicular to the inner side surface of the side wall 110. On the basis of this, the ratio of the pore diameter D1 of the honeycomb cells 331 of the honeycomb structure 330 in the space D2 of the first wall 341 and the second wall 342 may be 1/5 to 4/5, for example, 1/5, 2/5, 3/5, 4/5, etc. The aperture D1 of the honeycomb hole 331 is a distance between two parallel sides of the hexagon corresponding to the honeycomb hole 331. Through the above structural design, the utility model can avoid the influence of the supporting and buffering effects caused by the overlarge aperture D1 of the honeycomb holes 331 of the honeycomb structure 330, and can avoid the deformation required by the impact test caused by the overlarge aperture D1 of the honeycomb holes 331 of the honeycomb structure 330. In some embodiments, the ratio of the aperture D1 of the honeycomb holes 331 in the distance D2 between the first wall 341 and the second wall 342 may be less than 1/5, or may be greater than 4/5, such as 1/6, 5/6, etc., which is not limited in this embodiment.

In an embodiment of the present utility model, the upper end of the positioning member 300 may be lower than the upper end of the sidewall 110 of the case 100. Through the structural design, the utility model can avoid the structural interference between the positioning piece 300 and other components at the upper part of the box body 100, and is beneficial to saving the space in the height direction. In some embodiments, the upper end of the positioning member 300 may also be flush with the upper end of the sidewall 110 of the case 100, which is not limited to this embodiment.

In an embodiment of the present utility model, the upper end of the positioning member 300 may be higher than the upper end of the cylindrical battery 200. Through the structural design, the positioning piece 300 can further ensure the positioning, supporting and buffering protection effects of the cylindrical battery 200 in the whole height range. In some embodiments, the upper end of the positioning member 300 may also be flush with the upper end of the cylindrical battery 200, which is not limited to this embodiment.

As shown in fig. 9, in an embodiment of the present utility model, the battery pack further includes a battery bracket 400, and the battery bracket 400 is disposed at the bottom of the case 100 and is used for supporting the cylindrical battery 200. Specifically, the battery bracket 400 has a receiving chamber 410, and the cylindrical battery 200 is partially received in the receiving chamber 410. On this basis, there is a gap between the edge of the battery bracket 400 and the side wall 110 of the case 100, and the positioning member 300 is located between the side wall 110 and the battery bracket 400.

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 of the details of the battery pack or any of the components of the battery pack shown in the drawings or described in the present specification.

In summary, the battery pack according to the present utility model sets the positioning member 300 between the cylindrical battery 200 and the sidewall 110 of the case 100, the positioning member 300 has a cavity penetrating through the top and the bottom, a reinforcing structure is disposed in the cavity, the reinforcing structure divides the cavity into a plurality of channels 310, and the extending direction of the channels 310 is perpendicular to the bottom of the case 100. Through the structural design, the anti-collision capacity of the battery pack can be improved, and the damage to the cylindrical battery 200 when the side surface of the battery pack is impacted in use or in a collision test is avoided. Meanwhile, the hole channel 310 is formed by the reinforcing structure in the cavity of the positioning piece 300, so that the positioning piece 300 can realize partial deformation when impacted, and the positioning piece 300 can avoid directly impacting the cylindrical battery 200 on the basis of providing the deformation quantity meeting the impact test requirement.

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 (11)

1. The utility model provides a battery package, its characterized in that includes box and a plurality of cylindrical battery, cylindrical battery set up in the box, the medial surface of at least one lateral wall of box is provided with the setting element, the setting element is located cylindrical battery with between the lateral wall, the setting element has the die cavity, the die cavity runs through the top and the bottom of setting element, be provided with additional strengthening in the die cavity, additional strengthening will the die cavity is separated into a plurality of pore channels, the extending direction perpendicular to of pore channel the bottom of the box.

2. The battery pack of claim 1, wherein the reinforcing structure comprises a stiffener.

3. The battery pack of claim 2, wherein for one of the positioning members, the reinforcing rib extends in a direction perpendicular to the inner side surface of the side wall.

4. The battery pack of claim 3, wherein the positioning member has a plurality of walls that enclose the cavity, the plurality of walls including a first wall and a second wall, each of the first wall and the second wall being parallel to the side wall and spaced apart in a direction perpendicular to an inner side of the side wall; the reinforcing rib is provided with an arc-shaped part and two straight parts, one straight part is connected between one end of the arc-shaped part and the first wall, and the other straight part is connected between the other end of the arc-shaped part and the second wall.

5. The battery pack of claim 1, wherein the positioning member has a first wall facing the cylindrical battery, the first wall participating in forming the cavity; the first wall is concave towards the surface of the cylindrical battery to form a profiling groove, and the profiling groove is matched with part of the shape of the side face of the cylindrical battery and used for accommodating part of the cylindrical battery.

6. The battery pack according to claim 5, wherein the surface of the first wall facing the side wall is provided with a convex part, the convex part is positioned between two adjacent profiling grooves, the positioning piece is further provided with a second wall, the second wall and the first wall are arranged at intervals in parallel and jointly participate in forming the cavity, and the second wall is arranged on the inner side surface of the side wall; the reinforcing structure comprises a reinforcing rib, one end of the reinforcing rib is connected with the second wall, and the other end of the reinforcing rib is connected with the convex part of the first wall.

7. The battery pack of claim 6, wherein the first wall is formed with at least three of the imitation grooves, such that a surface of the first wall facing the side wall has at least two of the convex portions; wherein, the reinforced structure includes two at least strengthening ribs, every protruding portion all is connected with one the strengthening rib.

8. The battery pack of claim 1, wherein the reinforcement structure comprises a honeycomb structure, and wherein the cells of the honeycomb structure define the cells.

9. The battery pack of claim 8, wherein the retainer has a plurality of walls that enclose the cavity, the plurality of walls including a first wall and a second wall, the first wall and the second wall each being parallel to the side wall and the first wall and the second wall being spaced apart in a direction perpendicular to an inner side of the side wall; wherein the ratio of the aperture of the honeycomb holes of the honeycomb structure to the space between the first wall and the second wall is 1/5-4/5.

10. The battery pack according to claim 1, wherein:

the upper end of the positioning piece is lower than or flush with the upper end of the side wall; and/or

The upper end of the positioning piece is higher than or flush with the upper end of the cylindrical battery.

11. The battery pack of claim 1, further comprising a battery tray disposed at a bottom of the case for holding the cylindrical battery, the battery tray having a receiving cavity in which the cylindrical battery is partially received; and a gap is formed between the edge of the battery bracket and the side wall of the box body, and the positioning piece is positioned between the side wall and the battery bracket.

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