CN217062379U - Battery pack - Google Patents

Abstract

The utility model relates to a battery technology field provides a battery package. The battery pack includes: the battery pack box body is provided with a fixing part; the battery pack box comprises a plurality of battery modules, a plurality of battery pack box bodies and a plurality of battery modules, wherein the battery modules are arranged in the battery pack box bodies; be equipped with the fixed part between two at least adjacent battery module in a plurality of battery module, and in two at least adjacent battery module: one side of one battery module, which faces the other battery module, is provided with a bulge, and the bulge is provided with a fixing structure; every battery module is fixed in the fixed part through fixed knot structure, and the fixed knot of two battery modules constructs at the vertical projection of fixed part and does not overlap. When the battery package that the assembly this application provided, only need the fixed knot who connects fixed part and every battery module alone to construct, this structural setting can promote the degree of accuracy and the stability of battery module and battery package box body coupling, simultaneously, can reduce the assembly degree of difficulty of battery module and battery package box to improve the whole assembly efficiency of battery package.

Description

Battery pack

Technical Field

The utility model relates to a battery technology field especially relates to a battery pack.

Background

In the related art, two adjacent battery modules are locked and fixed with a battery pack box body through bolts after being lapped. In this process, need the hole structure of two battery module of accurate counterpoint and the hole structure on the battery package box.

However, due to dimensional variations, it is difficult to smoothly fix the bolt structure through the three hole structures.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery pack to reduce the assembly degree of difficulty of battery module and battery pack box, promote the degree of accuracy and the stability of battery module and battery pack box body coupling.

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

according to the utility model discloses a first aspect provides a battery pack, include:

a battery pack case having a fixing portion;

the battery pack box comprises a plurality of battery modules, a plurality of battery pack box bodies and a plurality of battery modules, wherein the battery modules are arranged in the battery pack box bodies; be equipped with between two at least adjacent battery modules in a plurality of battery modules the fixed part, just in two at least adjacent battery modules:

one side of one battery module, which faces the other battery module, is provided with a bulge, and the bulge is provided with a fixing structure; each battery module is fixed to the fixing portion through the fixing structure, and the vertical projections of the fixing structures of the two battery modules on the fixing portion are not overlapped.

In the battery package that this application provided, be equipped with the fixed part between at least two adjacent battery module in a plurality of battery module, and every battery module passes through bellied fixed knot to be constructed and is connected with the fixed part in these two adjacent battery module. It should be noted that the vertical projections of the fixing structures of two adjacent battery modules at the fixing portion do not overlap. When the battery package that the assembly this application provided, only need the fixed knot who connects fixed part and every battery module alone to construct, this structural setting can promote the degree of accuracy and the stability of battery module and battery package box body coupling, simultaneously, can reduce the assembly degree of difficulty of battery module and battery package box to improve the whole assembly efficiency of battery package. In addition, because each battery module is fixed with the battery pack box body independently, when the battery module needs to be disassembled and maintained, the battery module is only disassembled for maintenance, and the disassembling and assembling steps can be simplified.

Drawings

For a better understanding of the present disclosure, 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 so as to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views. Wherein:

fig. 1 is a schematic structural diagram of a battery pack provided in an embodiment of the present application;

fig. 2 is a schematic diagram of a second structure of a battery pack according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram of a third structure of a battery pack according to an embodiment of the present application;

fig. 4 is a schematic structural view of a battery module in fig. 1;

fig. 5 is a schematic perspective view illustrating the battery module of fig. 4.

The reference numerals are illustrated below:

100. a battery pack case; 110. a fixed part; 200. a battery module; 210. a side plate; 211. a protrusion; 2111. and (5) fixing the structure.

Detailed Description

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

In the description of the present disclosure, unless explicitly specified or limited otherwise, 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; the term "plurality" means two or more; 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 also intended to mean one of possibly multiple such objects.

The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood as a specific case by a person skilled in the art.

Further, in the description of the present disclosure, it should be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in this context, when an element or feature is referred to as being "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via intervening elements.

The embodiment of the application provides a battery pack. Fig. 1 is a schematic structural diagram of a battery pack provided in an embodiment of the present application. As shown in fig. 1, the battery pack provided by the embodiment of the present application includes:

a battery pack case 100, the battery pack case 100 having a fixing portion 110;

a plurality of battery modules 200, the plurality of battery modules 200 being disposed in the battery pack case 100; a fixing portion 110 is provided between at least two adjacent battery modules 200 among the plurality of battery modules 200, and in at least two adjacent battery modules 200:

one side of one battery module 200 facing the other battery module 200 is provided with a protrusion 211, and the protrusion 211 is provided with a fixing structure 2111; each battery module 200 is fixed to the fixing part 110 by the fixing structure 2111, and the vertical projections of the fixing structures 2111 of the two battery modules 200 at the fixing part 110 do not overlap.

It should be noted that, in the battery pack provided in the embodiment of the present application, the fixing portion 110 is disposed between at least two adjacent battery modules 200 in the plurality of battery modules 200, and each battery module 200 in the two adjacent battery modules 200 is connected to the fixing portion 110 through the fixing structure 2111 of the protrusion 211.

It is understood that "a plurality" means at least two, and may be, for example, 2, 3 or 4. Taking 3 battery modules 200 in the battery pack provided in the embodiment of the present application as an example, the fixing portion 110 is disposed between at least two adjacent battery modules 200, exemplarily, the fixing portion 110 may be disposed between only two adjacent battery modules 200, and the fixing portion 110 may be disposed between every two adjacent battery modules 200, which may be specifically disposed as required, and is not repeated herein.

It should be noted that the vertical projections of the fixing structures 2111 of two adjacent battery modules 200 on the fixing portion 110 do not overlap. When assembling the battery pack provided by the embodiment of the application, only the fixing structure 2111 of the fixing part 110 and each battery module 200 needs to be connected independently, the structure can improve the accuracy and stability of connection between the battery modules 200 and the battery pack box 100, and meanwhile, the assembly difficulty of the battery modules 200 and the battery pack box 100 can be reduced to improve the overall assembly efficiency of the battery pack. In addition, since each battery module 200 is individually fixed to the battery pack case 100, when the battery module 200 needs to be disassembled and maintained, the disassembly and assembly steps can be simplified by disassembling only the battery module 200 for maintenance.

When arranging the battery modules 200 in the battery pack case 100, the following principles are generally followed: more cells are arranged in one direction to form the long sides of the battery module 200, and less cells are arranged in the other direction to form the short sides of the battery module 200; the plurality of battery modules 200 in the battery pack are arranged in the short side direction so as to be arranged in the battery pack case 100.

For example, as shown in fig. 1, three battery modules 200 are placed in the battery pack case 100, and certainly, the number of the battery modules 200 in the battery pack case 100 is not limited thereto, and may be specifically set according to requirements, and is not described herein again. With continued reference to the structure shown in fig. 1, the first direction is the long side direction of each battery module 200, and each battery module 200 extends along the first direction; the second direction is a short-side direction of the battery modules 200, the second direction is perpendicular to the first direction, and the plurality of battery modules 200 are arranged along the second direction. Taking two battery modules 200 adjacent in the second direction as an example, the two battery modules 200 are separated by the fixing portion 110, and a protrusion 211 is provided at one side of each battery module 200 facing the other battery module 200.

In one embodiment, such as the structure shown in FIG. 1, the securing structures 2111 on each protrusion 211 are shown in an aperture configuration, and the aperture configuration on each protrusion 211 is shown as one. It should be understood that the hole structure on each protrusion 211 may be one or more, and may be specifically configured according to the requirement, and will not be described herein again.

It should be noted that, when the fixing structure 2111 on each protrusion 211 is a hole structure, a bolt assembly, a screw, a rivet column, and other structures may be used to connect the battery module 200 and the battery pack case 100, so as to simplify the complexity of the connection structure, and improve the assembly efficiency.

Taking the battery pack case 100 and the battery module 200 as an example, when the battery module 200 is assembled inside the battery pack case 100, a bolt through hole structure may be adopted, and nuts and bolts are adopted to cooperate, so as to fix the relative positions of the battery module 200 and the battery pack case 100.

In one embodiment, the aperture structure is injection molded with a nut inside.

It should be noted that, by presetting the nut structure in the hole structure, the battery module 200 and the battery pack case 100 can be conveniently connected in the following manner, so as to improve the assembly efficiency, and meanwhile, the stability of the connection structure of the battery module 200 and the battery pack case 100 can be improved.

Of course, each battery module 200 may be fixed to the battery pack case 100 by other structures, such as a snap-fit structure. Specifically, the fixing knot on each protrusion 211 may be a snap buckle or the like.

It is noted that there are various arrangements of the protrusions 211 on the two battery modules 200 when the vertical projections of the fixing structures 2111 of the two battery modules 200 at the fixing part 110 do not overlap.

In one embodiment, referring to the structure shown in fig. 2, along the second direction, the vertical projections of the protrusions 211 of two adjacent battery modules 200 on the fixing portion 110 are partially overlapped. It is to be understood that, in the structural arrangement as shown in fig. 2, the protrusions 211 of each battery module 200 are arranged at different heights in a third direction perpendicular to both the first direction and the second direction to be evacuated.

It is noted that the positions of the hole structures may be adjusted by the protrusions 211 such that the vertical projections of the hole structures of the two battery modules 200 on the fixing part 110 do not overlap. Alternatively, an escape notch may be provided on the protrusion 211 so that the hole structures of the two battery modules 200 do not overlap in the vertical projection of the fixing part 110.

It should be noted that, in the structure shown in fig. 2, there is no interference between the protrusions 211 of the adjacent battery modules 200, and there is no need to consider a problem of avoidance when assembling the battery modules 200 and the battery pack case 100, so that the assembly efficiency can be improved.

In another embodiment, the protrusions 211 of two adjacent battery modules 200 do not overlap in vertical projection on the fixing part 110. Illustratively, as shown in fig. 1, the protrusions 211 of two adjacent battery modules 200 are staggered in the first direction.

It should be noted that, since the protrusion 211 on each battery module 200 does not affect the connection between the hole structure on another battery module 200 and the fixing part 110, each protrusion 211 may be a complete structure to ensure the structural strength of the protrusion 211, thereby improving the structural stability of the battery module 200 and the battery pack case 100 after connection. Meanwhile, since there is no interference between the protrusions 211 of the adjacent battery modules 200, there is no need to consider the avoidance problem during assembly, so that the assembly efficiency can be improved.

In one embodiment, referring to the structure shown in fig. 3, along the second direction, two adjacent battery modules 200: the vertical projection of the center of the hole structure of one battery module 200 on the fixing part 110 is collinear with the vertical projection of the center of the hole structure of the other battery module 200 on the fixing part 110.

It should be noted that, when the vertical projections of the centers of the hole structures of the two battery modules 200 on the fixing portion 110 are collinear, the structures on the fixing portion 110 may be arranged along a straight line, so as to reduce the manufacturing difficulty and improve the production efficiency.

For example, when the hole structure is provided on the fixing portion 110 to correspond to the hole structure of the protrusion 211, the holes may be sequentially punched in a straight line step by step using a punching apparatus. It should be noted that, in the process of punching by the punching device, the punching device only moves in one direction, which can reduce the difficulty of preparation.

Specifically, when preparing the pore structure on the fixed part 110, only need control adjacent pore structure at the ascending interval size of an side, can promote on the fixed part 110 pore structure and the arch 211 pore structure precision of counterpointing, can promote the degree of accuracy and the stability that battery module 200 and battery package box 100 are connected to and, can reduce the assembly degree of difficulty of battery module 200 and battery package box 100, thereby can improve the whole assembly efficiency of battery package.

It is noted that, in the structural arrangement as shown in fig. 3, the height at which the protrusions 211 of each battery module 200 are arranged may be the same or different in a third direction perpendicular to both the first direction and the second direction.

In one embodiment, the battery pack case 100 includes a beam. It should be noted that the beams may assist the battery pack case 100 in supporting the expansion force of the battery, so as to enhance the strength of the battery pack case 100 and improve the stability and safety of the battery pack. Specifically, the beams are divided into edge beams and partition beams according to functions, wherein the edge beams form an annular structure, and the partition beams are disposed in the annular structure formed by the edge beams to partition the inner space of the battery pack case 100.

In one embodiment, please continue to refer to the structure shown in FIG. 1. The partition beams partition the space in the battery pack case 100 into at least two receiving parts, each of which is used to receive one battery module 200, and the partition beams between two adjacent receiving parts form the fixing part 110. In other words, the battery module 200 may be fixed to the partition beams by the fixing structures 2111 on the protrusions 211.

It should be noted that the structural arrangement can simplify the internal structure of the battery pack case 100, and the fixing portion 110 does not need to be separately arranged to support the battery module 200, thereby improving the space utilization rate in the battery pack case 100.

Of course, the fixing part 110 may also be another structure disposed inside the battery pack case 100, and for example, the fixing part 110 may be a bottom plane of the battery pack case 100; alternatively, the fixing portion 110 may be another protrusion 211 structure protruding from the bottom plane of the battery pack case 100; alternatively, the fixing portion 110 may have a concave structure. For example, the fixing part 110 between two adjacent battery modules 200 may be formed of several continuous or interrupted other protrusion 211 structures or depression structures.

In one embodiment, with continued reference to the structure shown in fig. 1, two adjacent battery modules 200 are disposed on both sides of the partition beam, and each battery module 200 is fixed to the top surface of the partition beam by the fixing structure 2111 provided on the protrusion 211.

For example, the fixing structure 2111 and the partition beam may be connected by bolts, so as to reduce the assembly difficulty and improve the assembly efficiency. Meanwhile, the bolt connection can facilitate the subsequent disassembly, assembly and maintenance of the battery module 200 in each accommodating cavity.

In one embodiment, referring to the structure shown in fig. 4, in the second direction, the battery module 200 includes two side plates 210 disposed opposite to each other; at least one side plate 210 of the two side plates 210 is provided with a plurality of protrusions 211. It is understood that "plurality" means at least two.

It should be noted that, each battery module 200 is fixed to the battery pack case 100 by a plurality of protrusions 211 provided on the side plates 210, so that the stability of the structure after the fixing of the battery modules and the battery pack case can be improved.

In one embodiment, with continued reference to the structure shown in fig. 1, both side plates 210 are provided with the protrusions 211.

It should be noted that, at least two protrusions 211 are disposed on each side plate 210 at intervals, and the protrusions 211 can cooperate with each other to improve the stability of the structure of the battery module 200 after being connected to the battery pack case 100.

It is understood that the plurality of protrusions 211 on each side plate 210 may be uniformly spaced apart to fix portions of the battery module 200 in the first direction. Of course, it is also possible to provide: the protrusions 211 on each side plate 210 are disposed at non-uniform intervals to avoid the protrusions 211 on the adjacent battery modules 200, which is not described in detail.

In one embodiment, referring to the structure shown in fig. 5, the protrusion 211 on each side plate 210 is located at the same height as the protrusion 211 on the other side plate 210 along the third direction.

It should be noted that, when the protrusions 211 on the side plates 210 on both sides of the battery module 200 are located at the same height, the battery pack case 100 and the battery module 200 can be conveniently fixed, and the size of the connection structure between the two in the third direction can be the same, or even the same connection structure can be selected for use, so as to reduce the assembly difficulty and improve the assembly efficiency.

In one specific embodiment, as shown in fig. 5, in each battery module 200, the protrusions 211 on each side plate 210 and the protrusions 211 on the other side plate 210 are symmetrically arranged along a diagonal line of the battery module 200.

It should be noted that, since the protrusions 211 of the two side plates 210 in the battery module 200 are arranged along the diagonal line, the two side plates 210 may have the same structure, and thus the side plates 210 of the same specification may be used for installation, so as to reduce the production cost of the battery module 200.

When installing the battery module 200 that this application embodiment provided, because battery module 200 both sides curb plate 210 structure is the same, so need not to distinguish the specification of curb plate 210 when the installation, can save the manual identification process in the installation to can promote battery module 200's assembly efficiency.

With continued reference to the structure shown in fig. 4 and 5, the protrusions 211 on the two side plates 210 are, for example, symmetrically arranged along the diagonal line a. Of course, the two protrusions 211 may also be arranged along a diagonal line intersecting a, and will not be described herein. Specifically, taking the protrusion 211 of one side plate 210 at the P1 position as an example, when the battery module 200 rotates along the arrow direction (shown by the dotted line), the protrusion 211 at the P1 position will rotate to the P2 position, and the alignment connection between the protrusion 211 and the fixing portion 110 will not be affected. Therefore, when assembling the battery pack according to the embodiment of the present application, any of the side plates 210 of each battery module 200 may be selected to be mounted toward another battery module 200.

In one embodiment, the side plate 210 and the protrusion 211 are integrally formed to simplify the manufacturing process and reduce the manufacturing cost.

It should be noted that, since the side plate 210 and the protrusion 211 are integrally formed, the strength of the whole structure is high, and the fixing effect can be improved.

In another embodiment, the side plate 210 and the protrusion 211 are of a split structure, each part is separately prepared according to the requirement, and after the preparation is completed, the side plate 210 and the protrusion 211 are connected.

In one embodiment, the side plates 210 may be provided with an insulating structure to prevent the internal structure of the battery module 200 from being short-circuited with the outside. The insulating structure may be one or more of an insulating coating, an insulating film, or an insulating tape. It should be noted that the insulating structure may be wrapped on the surface of the side plate 210, and may be specifically disposed according to requirements, which is not described herein again.

In another embodiment, the side plate 210 is made of an insulating material. It should be understood that the side plate 210 may be partially made of an insulating material or may be entirely made of an insulating material. When the side plate 210 is entirely made of an insulating material, the insulating property of the side plate 210 may be better improved, and the side plate 210 may also serve as an insulating plate to insulate the battery from other structures.

Illustratively, when the side panel 210 is made of an insulating material, the insulating material may be selected as one or more of PC (polycarbonate), or PP (polypropylene), or a composite material of PC and ABS (acrylonitrile butadiene styrene copolymers).

In one embodiment, the battery module 200 includes a plurality of batteries.

The battery module 200 includes a plurality of batteries, and the batteries may be square batteries or cylindrical batteries. When the batteries are square batteries, the battery module 200 may further include end plates, the end plates and the side plates 210 for fixing the plurality of batteries; when the battery is a cylindrical battery, the battery module 200 may further include a bracket to which the battery may be fixed.

It should be noted that, in the battery pack provided in the embodiment of the present application, the side plates 210 may integrate a bracket function to fix the battery, so as to further improve the integration level of the battery pack and improve the space utilization rate in the battery pack.

In one embodiment, each cell includes a first electrode terminal and a second electrode terminal.

The first electrode terminal and the second electrode terminal have opposite polarities and are insulated from each other. Specifically, when the first electrode terminal is a positive polarity terminal, the second electrode terminal is a negative polarity terminal, whereas when the first electrode terminal is a negative polarity terminal, the second electrode terminal is a positive polarity terminal.

In a specific embodiment, the first electrode terminal and the second electrode terminal are both terminals, and the first electrode terminal and the second electrode terminal are disposed on two opposite sides of the battery along the second direction. It should be understood that when the batteries are placed in the battery pack case 100, each battery may be arranged laterally if the bottom of the battery pack case 100 is used as the bottom surface, and the first direction and the second direction are parallel to the bottom surface of the battery pack case 100. Of course, the batteries can be vertically arranged in the battery pack case 100, and the detailed description is omitted.

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

Claims (10)

1. A battery pack, comprising:

a battery pack case (100), the battery pack case (100) having a fixing portion (110);

a plurality of battery modules (200), the plurality of battery modules (200) being disposed in the battery pack case (100); be equipped with between at least two adjacent battery module (200) in a plurality of battery module (200) fixed part (110), and in at least two adjacent battery module (200):

a bulge (211) is arranged on one side, facing the other battery module (200), of one battery module (200), and the bulge (211) is provided with a fixing structure (2111); each battery module (200) is fixed to the fixing portion (110) through the fixing structure (2111), and the vertical projections of the fixing structures (2111) of the two battery modules (200) on the fixing portion (110) are not overlapped.

2. The battery pack according to claim 1, wherein, of the at least two adjacent battery modules (200):

the vertical projection of the protrusion (211) of one battery module (200) on the fixing part (110) is not overlapped with the vertical projection of the protrusion (211) of the other battery module (200) on the fixing part (110).

3. A battery pack according to claim 1 or 2, wherein the securing structure (2111) is a hole structure provided in the protrusion (211).

4. The battery pack according to claim 3, wherein, of the at least two adjacent battery modules (200):

the vertical projection of the center of the hole structure of one battery module (200) on the fixing portion (110) is collinear with the vertical projection of the center of the hole structure of the other battery module (200) on the fixing portion (110).

5. The battery pack of claim 3, wherein the aperture structure is injection molded with a nut inside.

6. The battery pack according to claim 1 or 2, wherein the battery pack case (100) comprises a ring frame and partition beams that partition a space formed around the ring frame and form the fixing portion (110);

the separation beam is arranged between the two adjacent battery modules (200), and each battery module (200) is fixed with the top surface of the separation beam through a fixing structure (2111) arranged on the protrusion (211).

7. The battery pack according to claim 6, wherein, in the arrangement direction of the at least two adjacent battery modules (200), the battery modules (200) include two side plates (210) that are disposed opposite to each other; at least one side plate (210) of the two side plates (210) is provided with a plurality of protrusions (211).

8. The battery pack according to claim 7, wherein in each of the battery modules (200):

the two side plates (210) are provided with the protrusions (211);

the bulge (211) on each side plate (210) is positioned at the same height as the bulge (211) on the other side plate (210).

9. The battery pack according to claim 8, wherein in each of the battery modules (200):

the protrusions (211) on each side plate (210) and the protrusions (211) on the other side plate (210) are symmetrically arranged along the diagonal line of the battery module (200).

10. The battery pack according to claim 7, wherein the side plate (210) is an insulating plate.

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