CN219959214U - Battery pack - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides a battery pack. The battery pack includes: the battery box comprises a box body and a box cover, and the box cover is buckled with the box body; a separation beam is arranged in the box body, and the separation beam separates the internal space of the box body into an electric bin and a battery bin; the separation beam is provided with a supporting piece which is abutted against the surface of one side of the box body, which faces the box cover. According to the battery pack, the partition beam is reasonably utilized, and the supporting piece is arranged on the partition beam, so that the supporting piece is used for supporting the part of the battery box cover, which spans the battery box and the electric box, in an auxiliary mode, the structural stability of the assembled battery box cover can be enhanced, the collapse of the battery box cover is avoided, and the overall structural strength of the battery box can be further enhanced, and the safety performance 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 conventional battery pack, various structural members such as a battery are arranged inside a battery case. In order to increase the electric quantity of the battery pack, the size of the existing battery pack is designed to be larger, and the size of the battery box is also larger because the size of the battery pack is influenced by the size of the battery box so as to internally install enough batteries. It is noted that the battery box comprises a box body and a box cover, and the box cover is fixedly connected with the box body at the edge position. Since the case cover of the battery case is generally formed by punching, the structural strength is low. When the cover is large in size, the cover is easily deformed such as sagging at a position away from the connection position.

Therefore, how to improve the structural stability of the case cover after assembly is a technical problem to be solved.

Disclosure of Invention

The utility model provides a battery pack, which can improve the structural stability of a box cover and a battery box after assembly, and further can improve the safety performance of the battery pack.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

according to a first aspect of the present utility model, there is provided a battery pack comprising: the battery box comprises a box body and a box cover, and the box cover is buckled with the box body; a separation beam is arranged in the box body, and the separation beam separates the internal space of the box body into an electric bin and a battery bin; the separation beam is provided with a supporting piece which is abutted against the surface of one side of the box body, which faces the box cover.

According to the battery pack, the partition beam is reasonably utilized, and the supporting piece is arranged on the partition beam, so that the supporting piece is used for supporting the part of the battery box cover, which spans the battery box and the electric box, in an auxiliary mode, the structural stability of the assembled battery box cover can be enhanced, the collapse of the battery box cover is avoided, and the overall structural strength of the battery box can be further enhanced, and the safety performance of the battery pack is improved.

Drawings

For a better understanding of the utility model, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present utility model. In addition, the relevant elements or components may have different arrangements as known in the art. Furthermore, in the drawings, like reference numerals designate identical or similar parts throughout the several views. Wherein:

fig. 1 is a schematic and schematic diagram of a battery pack according to an embodiment of the present utility model;

fig. 2 is a schematic perspective view of a battery pack according to an embodiment of the present utility model;

FIG. 3 is an enlarged schematic view of a portion of the structure of FIG. 2;

fig. 4 is a partially enlarged schematic illustration of a battery pack according to an embodiment of the present utility model.

The reference numerals are explained as follows:

100. a battery box; 110. a case; 120. a case cover; 130. a dividing beam; 200. a support; 210. a first portion; 211. a mounting hole; 220. a second portion; 230. a third section; 300. a battery; 400. a glue layer; s1, an electric bin; s2, a battery compartment; p, a supporting surface.

Detailed Description

The technical solutions in the exemplary embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the exemplary embodiments of the present utility model. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present utility model, and it should be understood that various modifications and changes can be made to the example embodiments without departing from the scope of the utility model.

In the description of the present utility model, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/" object or "an" object are likewise intended to mean one of a possible plurality of such objects.

Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

Further, in the description of the present utility model, it should be understood that the terms "upper", "lower", "inner", "outer", and the like in the exemplary embodiments of the present utility model are described in terms of the drawings, and should not be construed as limiting the exemplary embodiments of the present utility model. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.

The embodiment of the utility model provides a battery pack. Fig. 1 is a schematic and schematic diagram of a battery pack according to an embodiment of the present utility model; fig. 2 is a schematic perspective view of a battery pack according to an embodiment of the present utility model; FIG. 3 is an enlarged schematic view of a portion of the structure of FIG. 2; fig. 4 is a partially enlarged schematic illustration of a battery pack according to an embodiment of the present utility model. The partial structure of the battery pack is specifically shown in fig. 2. In this exemplary embodiment, the battery pack according to the embodiment of the present utility model is described by taking a vehicle-mounted battery pack 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 embodiments of the present utility model to other types of battery packs, and such changes remain within the principles of the battery packs presented herein.

Referring to the structure shown in fig. 1 and 2, the battery pack includes: the battery box 100, the battery box 100 includes a box body 110 and a box cover 120, the box cover 120 is buckled with the box body 110; a separation beam 130 is arranged in the box body 110, and the separation beam 130 separates the internal space of the box body 110 into an electric bin S1 and a battery bin S2; the partition beam 130 is provided with a supporting piece 200, and the supporting piece 200 abuts against one side surface of the case cover 120, which faces the case body 110.

Specifically, the edge position of the case cover 120 shown in fig. 1 is coupled to the case body 110 to be fastened to one side opening of the case body 110, thereby forming a stable battery case 100 structure. It should be appreciated that the edges of the cover 120 that overlap the case 110 may be effectively supported by the case 110. With continued reference to the structure shown in fig. 1, the partition beam 130 partitions the internal space of the case 110 into an electrical compartment S1 and a battery compartment S2, and the partition beam 130 is provided with a support member 200, and the support member 200 abuts against the case cover 120 to support the case cover 120.

It should be noted that, in the battery inclusion package provided in the embodiment of the present utility model, the spacer beam 130 is used, and the support member 200 is disposed on the spacer beam 130, so that the support member 200 is used to support the portion of the case cover 120 that spans the battery compartment S2 and the electric compartment S1 in an auxiliary manner, so that the structural stability of the case cover 120 after assembly can be enhanced, the case cover 120 is prevented from collapsing, and further the overall structural strength of the battery case 100 can be enhanced, so as to improve the safety performance of the battery pack.

It should be understood that the electrical components are mainly disposed in the electrical compartment S1, and the battery 300 is mainly disposed in the battery compartment S2. Of course, other structures may be installed in the battery compartment S2 and the electrical compartment S1, which will not be described herein.

Since the battery case 100 is generally rectangular parallelepiped, the long-side extending direction of the battery case 100 may be defined as the direction X; the short side extension direction of the battery case 100 may be defined as a direction X, and the height direction of the battery case 100 may be defined as a direction Z, wherein the direction X, the direction Y, and the direction Z are perpendicular to each other.

It is noted that the case cover 120 and the case body 110 are arranged along the direction Z; when the separation beam 130 is adopted to form the electrical bin S1 and the battery bin S2, the arrangement direction of the battery bin S2 and the electrical bin S1 can be set to be parallel to the direction Y, so that the internal space of the box body 110 is reasonably utilized, more batteries 300 can be arranged in the battery bin S2, and the overall electric quantity of the battery pack is improved.

In addition, the case 110 in the battery case 100 includes an annular rim and a bottom plate closing the annular rim and opening at a side facing away from the case cover 120. For various structural members disposed within the battery box 100, the end of the structural member that is adjacent to the base plate may be referred to as the "bottom", and correspondingly, the end of the structural member that is away from the base plate may be referred to as the "top".

In particular, the support 200 is mounted to the spacer beam 130 in a number of arrangements, particularly at least one of the following arrangements.

In one embodiment, the support 200 may be mounted on top of the dividing beam 130. The support 200 abuts against the cover 120 to support the cover 120. It should be appreciated that the height of the support 200 in the direction Z is matched with the height of the partition beam 130, so that the space utilization inside the battery pack can be improved.

In another embodiment, as shown in fig. 1 and 2, the support 200 may be mounted to the side of the separation beam 130 facing away from the battery compartment S2.

It should be noted that, this structural arrangement can avoid the supporting member 200 occupying the space in the battery compartment S2, so as to ensure the energy density of the battery pack on the basis of improving the structural strength of the case cover 120. Meanwhile, the structural arrangement can save the top surface space of the separation beam 130 to arrange other structural members, and avoid influencing the arrangement requirement of the other structural members on the surface of the separation beam 130.

It should be noted that, when the supporting member 200 is fixed on the side of the partition beam 130 facing the battery compartment S2, the supporting member 200 may be welded to the partition beam 130, so as to improve the connection strength between the supporting member 200 and the partition beam 130, further improve the supporting stability of the supporting member 200 on the case cover 120, and ensure that the supporting member 200 can continuously and effectively support the case cover 120.

Of course, other processes than welding may be used to connect the support 200 to the spacer beam 130. For example, a screwing or clamping mode can be adopted to realize the detachable connection between the supporting piece 200 and the separation beam 130, so that the assembly difficulty is reduced; alternatively, the supporting member 200 and the partition beam 130 may be connected by riveting or bonding; alternatively, the support 200 may be manufactured from extruded profiles along with the spacer beams 130 and then shaped in a machined form.

In one embodiment, please continue to refer to the structure shown in fig. 1 to 4, the supporting member 200 is provided with a supporting surface P, the supporting member 200 abuts against the case cover 120 through the supporting surface P, and the shape of the supporting surface P is adapted to the shape of the part of the case cover 120 supported by the supporting surface P.

It should be noted that, in the present embodiment, the shape of the supporting surface P is adapted to the shape of the case cover 120 at the abutting position thereof, so that each portion of the supporting surface P can effectively support the case cover 120 at the corresponding position, thereby improving the supporting effect of the supporting member 200 on the case cover 120.

In a specific embodiment, the support surface P is a plane. The cover 120 is also planar here. It should be appreciated that this configuration may reduce assembly difficulty, accommodate errors in the installation of the cover 120 with respect to the case 110, and thus may ensure the supporting effect of the supporting member 200 on the cover 120.

Of course, the supporting surface P may also be a concave-convex surface, and the details thereof will not be described.

In one embodiment, referring to the structure shown in fig. 2 and 3, the support surface P is provided with mounting holes 211, and the support 200 is fixed to the case cover 120 through the mounting holes 211. In this embodiment, the case cover 120 is fixedly connected to the supporting member 200 at the abutting position, so as to further improve the connection firmness and stability of the case cover 120 and the case body 110 after assembly.

Of course, the support member 200 and the case cover 120 may be connected by bonding, and the details thereof will not be described herein.

In one embodiment, with continued reference to the structure illustrated in fig. 2-4, the support 200 includes a first portion 210 and a second portion 220, wherein:

the first portion 210 forms a support surface P;

the second portion 220 extends from one side of the first portion 210, and the extending direction of the second portion 220 is perpendicular to the extending direction of the first portion 210, and the second portion 220 is mounted to the separation beam 130.

It should be noted that, the support member 200 in this embodiment has a simple structure, is easy to prepare, and can reduce the preparation cost.

When the support member 200 in the embodiment of the present utility model is specifically provided, the first portion 210 and the second portion 220 may be in an integral structure, that is, the first portion 210 and the second portion 220 may be formed by bending the same plate body, so as to improve the structural strength of the support member 200, and ensure that the support member 200 can continuously and effectively support the case cover 120.

Notably, the first portion 210 can be located on a side of the second portion 220 facing away from or toward the battery compartment S2. In a preferred embodiment, referring to the structure shown in fig. 1 to 4, the first portion 210 is located on the side of the second portion 220 facing the battery compartment S2, and the front projection of the first portion 210 on the bottom of the case 110 overlaps at least part of the front projection of the partition beam 130 on the bottom of the case 110.

It should be noted that, as shown in fig. 1 to 4, the first portion 210 spans from the connection position with the second portion 220 to the upper portion of the separation beam 130, so that the internal space of the battery box 100 can be reasonably utilized, interference between the first portion 210 and the electrical components in the electrical bin S1 is avoided, and the maintenance and assembly difficulty of the electrical components in the electrical bin S1 can be reduced.

In one embodiment, with continued reference to the structure shown in fig. 1-4, the number of the supporting members 200 is plural, and the plurality of supporting members 200 are spaced apart along the extending direction (parallel to the direction X) of the dividing beam 130.

It should be noted that, the plurality of supporting members 200 may cooperate with each other to support the case cover 120 along the direction X from a plurality of position points, so as to improve the supporting effect on the case cover 120, and further improve the structural stability of the case cover 120 after assembly.

In one embodiment, please continue to refer to the structure shown in fig. 1, 2 and 4, the battery pack provided in the embodiment of the present utility model further includes a plurality of batteries 300, the plurality of batteries 300 are disposed in the battery compartment S2, and the plurality of batteries 300 form at least two battery rows; at least two cell rows are spaced apart along the extending direction (parallel to the direction X) of the partition beam 130;

at least one support 200 of the plurality of supports 200 corresponds to a gap between two adjacent battery rows, and the support 200 blocks at least a portion of an opening of the gap between the two battery rows at an end.

It should be noted that, when the support member 200 is used to block the openings of the adjacent battery rows in the direction Y, both the blocking and supporting functions can be integrated on the support member 200, so as to simplify the number of structural members in the battery pack, and improve the space utilization and energy density in the battery pack.

In a specific embodiment, with continued reference to the structure shown in fig. 4, the support 200 for performing the occlusion function may further include a third portion 230, the third portion 230 extending from the first portion 210 and being disposed on an opposite side of the second portion 220.

It will be appreciated that the third portion 230 has a size that is larger than the size of the opening of the gap at the end of the direction Y to ensure that the support 200 can effectively close off the opening of the gap at that side. Likewise, the height of the third portion 230 in the direction Z is higher than the height of the battery 300, so as to ensure that the plugging height is higher than the height of the battery 300, and further ensure that glue in the subsequent filling gap can effectively plug the battery 300.

Notably, the third portion 230 may abut the top surface of the spacer beam 130 at the bottom as shown in fig. 4 to mate with the spacer beam 130 to close the end opening of the gap in the direction Y; alternatively, a third portion 230 may be provided to extend between the dividing beam 130 and the cell line to enhance the sealing effect.

In one embodiment, the battery pack provided by the embodiment of the utility model further comprises a bus bar, wherein the bus bar is electrically connected with the battery 300, and at least part of the bus bar is positioned in a gap between the two battery bars. Each bus bar connects adjacent two cells 300 among the plurality of stacked cells 300 to achieve serial/parallel operation between the cells 300 so that the battery pack satisfies energy requirements.

It should be noted that, since the bus bar is disposed on the side of the battery 300, in order to avoid the bus bar from being shorted with the case 110 or other devices, the bus bar needs to be covered by insulation to ensure that the bus bar can function stably and effectively.

After glue is filled into the gaps between two specific battery rows, the glue filled in the gaps can effectively cover and isolate the mutual bus bars between the two adjacent battery rows.

In one embodiment, the battery pack provided by the embodiment of the utility model further comprises pouring sealant, and the pouring sealant is filled in the gap. It should be understood that the glue is selected as the pouring sealant in this embodiment.

The pouring sealant is used for bonding, sealing, encapsulating and coating protection of electronic components. The pouring sealant is liquid before solidification, has fluidity, and can enter into gaps at all positions according to a preset track so as to form a sealing layer between two adjacent battery rows after solidification.

In addition, the cured pouring sealant can play roles of water proofing, moisture proofing, dust proofing, insulation, heat conduction, confidentiality, corrosion resistance, temperature resistance and vibration prevention, and the safety performance of the battery pack provided by the embodiment of the utility model can be further improved.

In an embodiment, please continue to refer to the structure shown in fig. 1 and fig. 2 with reference to fig. 4, the battery pack provided in the embodiment of the utility model further includes a glue layer 400, the glue layer 400 is disposed on a side of the bottom of the battery 300 facing away from the case 110, and the glue layer 400 covers the top of the potting adhesive.

It should be noted that, the glue layer 400 may be matched with the potting adhesive to form effective insulation protection on the top and the side of the battery 300, so as to improve the safety performance of the battery 300, even the battery pack.

In one embodiment, the glue layer 400 forms a plane on the side facing away from the top of the cell 300.

It should be noted that, the glue layer 400 is later than the potting adhesive and is put into the battery pack, and the glue layer 400 can fill up the top of the plurality of stacked batteries 300, so that the sealing structure is firmer, and the plurality of stacked batteries 300 can be connected with other structural members.

With continued reference to the structure shown in fig. 4, along the direction Z, the supporting surface P of the supporting member 200 is flush with the top surface of the heat-conducting glue. This structure setting makes supporting surface P can with battery 300 in the battery compartment S2 and the structural fit such as glue film 400, support case lid 120 to promote the supporting effect to case lid 120, and then can promote the structural stability of case lid 120 after the assembly.

In one embodiment, the cover 120 is a heat exchanger plate. Illustratively, the heat exchange plate is a cold plate, and the heat exchange medium filled in the heat exchange plate is a cooling liquid.

The heat exchange plate is in heat exchange contact with the top of the battery 300 through the adhesive layer 400. Specifically, the heat exchange plate can exchange heat with the battery 300, so that heat at the battery 300 is timely led out, the running state of the battery 300 is optimized, and the safety performance of the battery pack is improved.

In a specific embodiment, the adhesive layer 400 is a heat-conducting adhesive, which has good heat-conducting property and can improve the heat exchange effect between the heat exchange plate and the battery 300.

In one embodiment, the case cover 120 is provided with an access opening at a position corresponding to the battery compartment S2, at least a portion of an edge of which is adjacent to the support 200.

It should be noted that, the supporting member 200 in the embodiment of the present utility model may provide effective support for the edge of the access opening, so as to raise the stress limit of the edge of the access opening, and avoid bending deformation of the edge during the opening and closing process of the access opening.

Other embodiments of the utility model will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This utility model is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the utility model and including such departures from the present disclosure as come within known or customary practice within the art to which the utility model pertains. The specification and example embodiments are to be considered exemplary only, with a true scope and spirit of the utility model being indicated by the following claims. It is to be understood that the utility model is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the utility model is limited only by the appended claims.

Claims (10)

1. A battery pack, comprising: the battery box comprises a box body and a box cover, and the box cover is buckled with the box body; a separation beam is arranged in the box body, and the separation beam separates an electric bin and a battery bin from the space in the box body; and the separation beam is provided with a supporting piece, and the supporting piece is abutted against the surface of the box cover, which faces one side of the box body.

2. The battery pack of claim 1, wherein the support is mounted to the side of the compartment Liang Beili on the battery compartment side.

3. The battery pack of claim 1, wherein the support member is provided with a support surface by which the support member abuts the case lid; the shape of the support surface is adapted to the shape of the part of the cover that it supports.

4. A battery pack as claimed in claim 3, wherein the support surface is provided with mounting holes, and the support member is fixed to the case cover through the mounting holes.

5. The battery pack of claim 3, wherein the support comprises a first portion and a second portion, wherein:

the first portion forming the support surface;

the second part extends from one side of the first part, the extending direction of the second part is perpendicular to the extending direction of the first part, and the second part is mounted on the separation beam.

6. The battery pack of claim 5, wherein the first portion is located on a side of the second portion facing the battery compartment, and wherein an orthographic projection of the first portion at the bottom of the box overlaps at least a portion of an orthographic projection of the dividing beam at the bottom of the box.

7. The battery pack of any one of claims 1-6, wherein the number of support members is a plurality; along the extending direction of the separation beam, a plurality of the supporting pieces are arranged at intervals.

8. The battery pack of claim 7, further comprising a plurality of batteries, a plurality of said batteries being disposed in said battery compartment, and a plurality of said batteries forming at least two battery rows; at least two battery rows are arranged at intervals along the extending direction of the separation beam;

at least one of the plurality of support members corresponds to a gap between two adjacent battery rows, and the support member blocks at least part of an opening of the gap between the two battery rows at an end.

9. The battery pack of any one of claims 1-6, wherein the case cover is a heat exchange plate.

10. The battery pack of claim 9, wherein the cover is provided with access openings at locations corresponding to the battery compartments, at least a portion of edges of the access openings being adjacent the support members.