CN214043823U

CN214043823U - Battery module

Info

Publication number: CN214043823U
Application number: CN202023322525.7U
Authority: CN
Inventors: 卢勇; 任耀启; 邱俊杰; 李立国; 田硕; 华剑锋; 孟庆然
Original assignee: Beijing Key Power Technology Co ltd
Current assignee: Beijing Key Power Technology Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-08-24
Anticipated expiration: 2030-12-31

Abstract

The utility model provides a battery module, battery module includes: the battery unit comprises at least two battery packs, and the at least two battery packs are stacked; the end plate subassembly, the inside installation cavity that forms of end plate subassembly, the both ends of battery cell are connected respectively in the both ends of installation cavity. The utility model discloses a battery module passes through the end plate subassembly and connects and fix the both ends of each group battery of battery cell, need not set up supporting structure, can realize interconnection between each group battery and fix, and overall structure is smaller and more exquisite, and space utilization is high, reaches the lightweight purpose of battery module.

Description

Battery module

Technical Field

The utility model relates to a power battery technical field particularly, relates to a battery module.

Background

For some battery packs with higher heights, the battery modules are often arranged in the battery box in a stacking mode, and the stacking mode of the battery modules in the prior art often adopts two modes: one mode is that the end plate of the battery module at the lower layer is connected with a battery box body, and the end plate of the battery module at the upper layer is connected with a bracket and is connected with the battery box body through the bracket; the other mode is that the end plates of the battery modules on the upper layer and the lower layer are connected with a bracket and connected with a battery box body through the bracket.

However, the two types of brackets usually have the defects of large occupied space, increased weight, low energy density, unfavorable weight reduction of the battery pack and the like.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a battery module, which solves the problems of large occupation space and heavy weight of the battery module in the prior art.

In order to achieve the above object, the utility model provides a battery module, battery module includes: the battery unit comprises at least two battery packs, and the at least two battery packs are stacked; the end plate subassembly, the inside installation cavity that forms of end plate subassembly, the both ends of battery cell are connected respectively in the both ends of installation cavity.

Further, the end plate assembly comprises two end plates which are oppositely arranged, and the installation cavity is formed between the two oppositely arranged end plates.

Furthermore, the upper end surface of the end plate and the lower end surface of the end plate are both provided with a first connecting hole, and the first connecting holes are used for being fixedly connected with the outside; or the end plate is provided with a through hole penetrating from the upper end face of the end plate to the lower end face of the end plate, the through hole forms a second connecting hole on the upper end face of the end plate and the lower end face of the end plate respectively, and the second connecting hole is used for being connected and fixed with the outside; or one of the upper end surface of the end plate and the lower end surface of the end plate is provided with a third connecting hole, and the third connecting hole is used for being connected and fixed with the outside.

Further, the battery unit further includes a support portion provided between the two battery packs stacked.

Further, the supporting portion includes a foam layer or a plastic strip.

Furthermore, the number of the battery units is at least two, the battery units are arranged along the extending direction of the width of the battery pack, and two ends of the at least two battery units are respectively connected with two ends of the mounting cavity.

Further, the end plate assembly further comprises a middle end plate, and the middle end plate is arranged between the two oppositely arranged end plates.

Further, be provided with a plurality of first connecting portion on the end plate, all be provided with the second connecting portion on four angles of group battery, a plurality of first connecting portions set up with a plurality of second connecting portion one-to-one.

Further, first connecting portion are the step hole, and step hole internally mounted has the nut, and the battery module still includes the bolt, and the second connecting portion are the mounting hole, and the mounting hole runs through the group battery, and the bolt is worn to establish in the mounting hole, and the tip of bolt passes the step hole, with the nut cooperation.

Further, the bottom of the battery unit is provided with a shock absorption part for supporting the battery unit.

Use the technical scheme of the utility model, the utility model discloses a battery module passes through the end plate subassembly and connects and fix the both ends of each group battery of battery cell, need not set up supporting structure, can realize each group battery interconnection and fixed, and overall structure is smaller and more exquisite, and weight is lighter, can realize the lightweight of battery module, does benefit to the use and the transportation of battery module.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 schematically shows a structural view of one embodiment of a battery module of the present invention;

fig. 2 schematically shows a structural view of another embodiment of the battery module of the present invention.

Wherein the figures include the following reference numerals:

10. a battery cell; 1. a battery pack; 20. an end plate assembly; 2. an end plate; 3. a support portion.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As described in the background art, for some battery packs with a high height, the battery modules are often arranged in the battery box in a stacking manner, and for the prior art of the stacking manner of the battery modules, two manners are often adopted: one mode is that the end plate of the battery module at the lower layer is connected with a battery box body, and the end plate of the battery module at the upper layer is connected with a bracket and is connected with the battery box body through the bracket; the other mode is that the end plates of the battery modules on the upper layer and the lower layer are connected with a bracket and connected with a battery box body through the bracket. However, the battery pack usually has the disadvantages of large occupied space of the bracket, increased weight, low energy density, no contribution to light weight of the battery pack and the like.

In order to solve the above problem, referring to fig. 1 and fig. 2, an embodiment of the present invention provides a battery module, which includes a battery unit 10 and an end plate assembly 20, wherein the battery unit 10 includes at least two battery packs 1, and the at least two battery packs 1 are stacked; the end plate assembly 20 internally forms a mounting cavity, and both ends of the battery cell 10 are connected to both ends of the mounting cavity, respectively. The utility model discloses a battery module passes through the end plate subassembly and connects and fix the both ends of each group battery of battery cell, need not set up supporting structure, can realize interconnection between each group battery and fix, and overall structure is smaller and more exquisite, and the weight is lighter, reaches the lightweight purpose of battery module, does benefit to the use and the transportation of battery module.

Specifically, the end plate assembly 20 in the present embodiment includes two end plates 2, the end plates 2 are disposed opposite to each other, and a mounting cavity is formed between the two end plates 2 disposed opposite to each other. The interconnection of a plurality of battery packs 1 and the fixation of the battery modules are realized through the end plates 2 without the interconnection of brackets, thereby reducing the weight and realizing the light-weight design.

For the convenience is right the utility model discloses a battery module fixes, the up end of end plate 2 and the lower terminal surface of end plate 2 in this embodiment all are provided with first connecting hole, and first connecting hole is used for fixed with external connection, and wherein, first connecting hole can be the screw hole, and fixed mode can be for bolt or fix with screw. Of course, other methods can be adopted to cooperate and fix with the first connecting hole.

In other embodiments, in order to facilitate the processing and installation, a through hole penetrating from the upper end surface of the end plate 2 to the lower end surface of the end plate 2 is formed in the end plate 2, and second connecting holes are formed in the upper end surface of the end plate 2 and the lower end surface of the end plate 2 respectively and are used for being fixed with external connection.

In other embodiments, limited to the space or the external structure, only one end of the end plate may be fixed, and for this reason, one of the upper end surface of the end plate 2 and the lower end surface of the end plate 2 in this embodiment is provided with a third connection hole for connection and fixation with the outside. The third connecting hole can be a threaded hole, and the fixing mode can be bolt or screw fixing. Of course, other methods can be adopted to match and fix the third connecting hole.

Because battery module can appear jolting in the transportation, and in some application environment, also can appear jolting, in order to improve anti-vibration performance, mutual interference when preventing to vibrate, battery unit 10 in this embodiment still includes supporting part 3, and supporting part 3 sets up between two group battery 1 of range upon range of setting, fills or bonds two group battery clearances as an organic whole through the supporting part, when preventing external vibration, takes place friction and collision between two group batteries, guarantees the life of group battery.

The supporting portion 3 in this embodiment includes a foam layer or a plastic strip. Specifically, the support portion may be foam for buffering, may be cured elastic glue disposed between the battery packs, or may be a hard glue strip with double-sided glue, and all of the purpose is to play a role of buffering between two stacked battery packs, as long as the structure can achieve the above purpose.

The battery pack is an integrated structure formed by a plurality of battery blocks and insulating plates positioned on two sides of the battery blocks by winding insulating films around the battery blocks.

The utility model discloses a battery module can be for medium-sized or large-scale module, and battery cell 10 in this embodiment is two at least promptly, and the both ends of installation cavity are connected respectively at two at least battery cell's both ends, and battery cell 10 arranges along the extending direction of the width of group battery 1. As shown in fig. 2, in this embodiment, the battery module not only includes a stacked arrangement but also includes a tiled arrangement, and the embodiment in fig. 2 actually includes three battery units, that is, six battery packs, which are divided into an upper layer and a lower layer, and three battery packs per layer are tiled.

In another embodiment, two battery units are included, that is, four battery packs are included, the four battery packs are divided into an upper layer and a lower layer, and three battery packs are arranged in a tiled manner in each layer.

The utility model discloses a mode of arranging of battery module is not limited to foretell embodiment, and the staff can be according to the in-service use condition, and then increase and decrease. And because the utility model discloses a battery module overall structure is simple, and the end plate subassembly is easily processed, wholly easily installs again, consequently, when adjusting the mode of arranging of battery module, can be more swift, convenient, has fine flexibility, is applicable to the modularization adjustment design.

In consideration of the case of using a long-length battery pack, the end plate assembly 20 in the present embodiment further includes an intermediate end plate 2, and the intermediate end plate 2 is disposed between two end plates 2 disposed opposite to each other to partition the installation cavity into two sub-cavities for installing two battery cells 10, respectively. The middle end plate plays a role in supporting and connecting the middle area in the mounting cavity, and the middle area of the battery pack with a long length is fixedly supported. In the above embodiment, the longer battery pack is composed of two groups, and in the embodiment that the longer battery pack is an organic whole, the middle end plate needs to be provided with the abdicating hole so as to abdicate the middle region of the longer battery pack, the bottom of the abdicating hole is provided with the supporting convex rib, and the upper end face of the supporting convex rib abuts against the bottom of the middle region of the longer battery pack.

In order to realize the connection between the end plate 2 and the battery pack, a plurality of first connection portions are provided on the end plate 2 in this embodiment, second connection portions are provided on four corners of the battery pack 1, and the plurality of first connection portions and the plurality of second connection portions are provided in a one-to-one correspondence manner. Wherein, can be connected for the joint between first connecting portion and the second connecting portion, also can be threaded connection, still can be for welding, riveting etc..

In a preferred embodiment, the first connecting portion in this embodiment is a stepped hole, a nut is mounted inside the stepped hole, the battery module further includes a bolt, the second connecting portion is a mounting hole, the mounting hole penetrates through the battery pack 1, the bolt is inserted into the mounting hole, and an end of the bolt penetrates through the stepped hole and is engaged with the nut. Through the cooperation of bolt and mounting hole, can make the connection between group battery and the end plate wholeness more to guarantee the overall stability of battery module.

In another embodiment, in order to protect the bottom of the battery cell from frictional collision with external devices, the bottom of the battery cell 10 in this embodiment is provided with a shock absorbing part for supporting the battery cell 10. The damping part can be foam for buffering, solidified elastic glue arranged between the battery packs, and a hard glue strip with glue on two sides. In a preferred embodiment, the shock absorbing part includes a spring assembly including a plurality of springs, and upper ends of the springs are connected to the bottom of the battery cell.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

the utility model discloses a battery module passes through the end plate subassembly and connects and fix the both ends of each group battery of battery cell, need not set up supporting structure, can realize interconnection between each group battery and fix, and overall structure is smaller and more exquisite, and the weight is lighter, reaches the lightweight purpose of battery module, does benefit to the use and the transportation of battery module.

It should be noted that the above detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In the foregoing detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, like numerals typically identify like components, unless context dictates otherwise. The illustrated embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be utilized, and other changes may be made, without departing from the spirit or scope of the subject matter presented here. It will be readily understood that the aspects of the present disclosure, as generally described herein, and illustrated in the figures, can be arranged, substituted, combined, separated, and designed in a wide variety of different configurations, all of which are explicitly contemplated herein.

The present disclosure in accordance with certain embodiments described herein is not to be limited in scope by the specific aspects illustrated. As will be apparent to those skilled in the art, many modifications and variations are possible without departing from the spirit and scope of the disclosure. Functionally equivalent methods and apparatuses, in addition to those enumerated herein, will be apparent to those skilled in the art from the foregoing description, within the scope of the present disclosure. Such modifications and variations are intended to fall within the scope of the appended claims. The disclosure is to be limited only by the terms of the appended claims, along with the full scope of equivalents to which such claims are entitled. It is to be understood that this disclosure is not limited to particular methods, reagents, compounds, compositions or biological systems, which can, of course, vary. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a battery module which characterized in that, battery module includes:

a battery unit (10), wherein the battery unit (10) comprises at least two battery packs (1), and at least two battery packs (1) are stacked;

the battery pack comprises an end plate assembly (20), wherein an installation cavity is formed inside the end plate assembly (20), and two ends of the battery unit (10) are respectively connected to two ends of the installation cavity.

2. The battery module according to claim 1, wherein the end plate assembly (20) comprises two end plates (2), the end plates (2) being disposed opposite each other, and the mounting cavity being formed between the two end plates (2) disposed opposite each other.

3. The battery module according to claim 1, wherein the upper end surface of the end plate (2) and the lower end surface of the end plate (2) are each provided with a first connection hole for connection fixation with the outside;

or the end plate (2) is provided with a through hole penetrating from the upper end face of the end plate (2) to the lower end face of the end plate (2), the through hole forms a second connecting hole on the upper end face of the end plate (2) and the lower end face of the end plate (2) respectively, and the second connecting hole is used for being connected and fixed with the outside;

or one of the upper end face of the end plate (2) and the lower end face of the end plate (2) is provided with a third connecting hole, and the third connecting hole is used for being fixedly connected with the outside.

4. The battery module according to claim 1, wherein the battery cell (10) further comprises a support portion (3), and the support portion (3) is disposed between two of the battery packs (1) that are stacked.

5. The battery module according to claim 4, wherein the support part (3) comprises a foam layer or a plastic strip.

6. The battery module according to claim 1, wherein the number of the battery cells (10) is at least two, and the battery cells (10) are arranged in the extending direction of the width of the battery pack (1); and two ends of at least two battery units are respectively connected with two ends of the mounting cavity.

7. The battery module according to claim 1, wherein the end plate assembly (20) further comprises a middle end plate (2), the middle end plate (2) being disposed between the two oppositely disposed end plates (2).

8. The battery module according to claim 1, wherein a plurality of first connecting portions are provided on the end plate (2), and a plurality of second connecting portions are provided at each of four corners of the battery pack (1), the plurality of first connecting portions being provided in one-to-one correspondence with the plurality of second connecting portions.

9. The battery module according to claim 8, wherein the first connecting portion is a stepped hole, a nut is mounted in the stepped hole, the battery module further comprises a bolt, the second connecting portion is a mounting hole, the mounting hole penetrates through the battery pack (1), the bolt is inserted into the mounting hole, and an end of the bolt penetrates through the stepped hole and is matched with the nut.

10. The battery module according to claim 1, wherein the bottom of the battery cell (10) is provided with a shock absorbing part for supporting the battery cell (10).