CN219457909U - Battery module and battery pack - Google Patents

Abstract

The utility model relates to the field of power batteries, in particular to a battery module and a battery pack, comprising: a housing having a receiving chamber formed therein for receiving the battery cell; the conductive bar is connected with the battery monomer, and a first connecting piece is formed on the end face of the conductive bar along the length direction; the cover plate is correspondingly arranged above the conductive bars, and a second connecting piece corresponding to the first connecting piece is formed on the lower surface of the cover plate; the first connecting piece is used for being matched with the second connecting piece to connect the conducting bar and the cover plate. The battery module can avoid the scrapping of the whole module caused by the damage of the non-replaceable parts, and meanwhile, the heat dissipation capacity of the conductive bars is enhanced, and the production cost of the battery module is reduced.

Description

Battery module and battery pack

Technical Field

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

Background

The battery pack generally comprises a battery module, the traditional battery module comprises a shell and a cover plate, the top of the shell is provided with a supporting plate, and the supporting plate is required to be made of plastic materials because the supporting plate is required to be isolated from two adjacent conducting bars, after the battery module is assembled, the supporting plate is pressed by the conducting bars and cannot be disassembled, and the battery pack belongs to non-replaceable devices. Because the buckle of connecting the apron is with backup pad integrated into one piece, after the apron dismantles the installation repeatedly, once the buckle damages, whole battery module is scrapped.

Therefore, there is a need to design a battery module and a battery pack, which can avoid the scrapping of the whole battery module caused by the damage of non-replaceable components.

Disclosure of Invention

In order to solve the above problems, the present utility model provides a battery module, which can avoid the scrapping of the whole module caused by the damage of non-replaceable components. The utility model also provides a battery pack using the battery module.

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

in a first aspect, there is provided a battery module including: a housing having an accommodating chamber formed therein for accommodating the battery cell; the conductive bar is connected with the battery monomer, and a first connecting piece is formed on the end face of the conductive bar along the length direction; the cover plate is correspondingly arranged above the conductive bars, and a second connecting piece corresponding to the first connecting piece is formed on the lower surface of the cover plate; the first connecting piece is used for being matched with the second connecting piece to connect the conducting bar and the cover plate.

Preferably, the plurality of conductive bars are arranged above the supporting plate side by side.

Preferably, the conductive bars are first conductive bars, and two end faces of each first conductive bar are respectively bent upwards to form first connecting pieces which are oppositely arranged.

Preferably, the conductive bar is a second conductive bar, and one end surface of the second conductive bar is bent upwards to form a first connecting piece.

Preferably, the lower surface of the cover plate is provided with a plurality of second connection members extending toward the first connection member, and the second connection members are arranged along the width direction of the cover plate.

Preferably, the conductive strip is integrally formed with the first connector.

Preferably, the first connecting piece is provided with a through connecting hole, the second connecting piece is provided with a protrusion matched with the connecting hole, and the protrusion is used for penetrating the connecting hole to connect the conductive bar and the cover plate.

Preferably, the first connecting piece is provided with a protrusion, the second connecting piece is provided with a connecting hole matched with the protrusion, and the protrusion is used for penetrating the connecting hole to connect the conductive bar and the cover plate.

Preferably, the second connecting piece is a reinforcing rib arranged on the lower surface of the cover plate.

In a second aspect, there is provided a battery pack comprising: a housing; the battery module is arranged in the shell, and the battery module is the battery module in the first technical scheme or various implementation modes thereof.

The beneficial effects of using the utility model are as follows:

the battery module provided by the utility model cancels the mode that the cover plate is connected with the buckle structure on the supporting plate in the prior art, and the first connecting piece arranged on the conducting bar and the second connecting piece arranged on the cover plate are used for connecting the conducting bar with the cover plate.

And secondly, due to the arrangement of the first connecting piece, the whole surface area of the conductive bar can be increased by about 20%, the conductive bar is favorable for heat dissipation, heat accumulation can be effectively reduced under the same working condition, and the whole performance of the battery module is improved.

And thirdly, as the structure of the battery body for connecting the cover plate is arranged on the conductive bar, the buckle structure on the original supporting plate is correspondingly canceled, so that the production die of the supporting plate is simpler, and the cost of the die is obviously reduced.

The battery pack provided by the utility model is provided with the battery module, and the battery pack provided with the battery module has corresponding technical effects because the battery module has the technical effects.

Drawings

The accompanying drawings are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain, without limitation, the embodiments. In the drawings:

fig. 1 is a schematic structural view of a battery module according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a conductive bar in an embodiment of the present application;

FIG. 3 is a schematic view of a cover plate according to an embodiment of the present application;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is a longitudinal cross-sectional view of an assembled cover plate and conductor bars in an embodiment of the present application;

FIG. 6 is an enlarged view of a portion of FIG. 5 at B;

FIG. 7 is a schematic diagram of an overall conductive bar assembly according to an embodiment of the present application;

fig. 8 is a partial enlarged view of fig. 7 at C.

The reference numerals include:

1-a shell, 2-a conductive bar and 21-a first connecting piece; 3-cover plate, 31-second connector, 2A-first conductive bar, 2B-second conductive bar, 211-connecting hole, 311-protrusion.

Detailed Description

In order to make the objects, technical solutions and advantages of the present technical solution more apparent, the present technical solution is further described in detail below in conjunction with the specific embodiments. It should be understood that the description is only illustrative and is not intended to limit the scope of the present technical solution.

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 in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

As described above, the inventors have found in the study of the battery module and the battery pack that the conventional battery module includes a case and a cover plate, and a support plate is provided at the top of the case, and since the support plate itself needs to separate two adjacent conductive bars, the support plate needs to be made of a plastic material, and after the battery module is assembled, the support plate is pressed by the conductive bars and cannot be disassembled, which is an unremovable device. Because the buckle of connecting the apron is with backup pad integrated into one piece, after the apron dismantles the installation repeatedly, once the buckle damages, whole battery module is scrapped.

In addition, the conductive bar is a heating device, so that the heat productivity of the conductive bar is large, the surface area of the traditional conductive bar is small, and the self heat dissipation capacity is limited to a certain extent. Because the side of backup pad is integrated to buckle, because the die joint design of preparation backup pad mould is comparatively difficult, corresponds the structure of mould complicated, and the mould cost is higher.

In order to partially solve the above technical problems, as shown in fig. 1 to 8, an embodiment of the present application provides a battery module, including: a housing 1 having a rectangular parallelepiped structure, wherein a receiving chamber for receiving a battery cell is formed inside the housing 1; it can be understood that the plurality of battery cells can be placed in the accommodating cavity in the form of a battery pack, and further comprise a plurality of conductive bars 2, wherein the plurality of conductive bars 2 are arranged above the supporting plate side by side, each conductive bar 2 is electrically connected with at least two battery cells, the conductive bars 2 are in a rectangular plate-shaped structure, and a first connecting piece 21 is formed on the end face along the length direction; a cover plate 3 is correspondingly arranged above the conductive bars 2, the cover plate 3 is used for being installed on the top surface of the shell 1 in a covering way so as to cover the structure of the top surface of the shell 1, for example, the conductive bars 2 are covered, and a second connecting piece 31 corresponding to the first connecting piece 21 is formed on the lower surface of the cover plate 3; the first connector 21 is adapted to cooperate with the second connector 31 to connect the conductor bars 2 with the cover plate 3.

Like this, because the buckle structure in the former backup pad has been cancelled to the battery module of this application embodiment, makes electric lead 2 and apron 3 be connected through first connecting piece 21 and the cooperation of second connecting piece 31, and is not connected with apron 3 through the backup pad, can avoid appearing because of the circumstances that buckle structure damages in the backup pad leads to the whole scrapping of battery module, has solved effectively after the battery module assembly is accomplished, because the backup pad is compressed tightly by electric lead 2 and leads to unable detachable technical problem. In addition, since the first connecting member 21 is made of metal, it is not easy to damage, and the module is not scrapped due to damage of the non-replaceable device.

Secondly, owing to the arrangement of the first connecting piece 21, the whole surface area of the conductive bar 2 can be increased by about 20%, the heat dissipation of the conductive bar 2 is facilitated, the heat accumulation can be effectively reduced under the same working condition, and the whole performance of the battery module is improved.

Further, the conductive strip 2 in the present embodiment includes a plurality, specifically 3 first conductive strips 2A and 2 second conductive strips 2B, the length of the second conductive strips 2B may be smaller than that of the first conductive strips 2A, wherein both end surfaces of the first conductive strips 2A are bent upward to form first connecting pieces 21 disposed oppositely, that is, the first connecting pieces 21 protrude from the top surface of the conductive strip 2 body and are disposed oppositely, and only one end surface of the second conductive strips 2B is bent upward to form first connecting pieces 21, wherein two first conductive strips 2A are disposed adjacently on one side in the length direction of the support plate, two second conductive strips 2B are disposed at both ends of the other side in the length direction of the support plate, and the other first conductive strip 2A is disposed between the two second conductive strips 2B, it should be noted that the first connecting pieces 21 of the second conductive strips 2B should be disposed inside the housing 1 so as to be adjacent to the first conductive strips 2A.

Accordingly, the bottom surface of the cover plate 3 is also provided with a plurality of second connecting pieces 31, and each second connecting piece 31 corresponds to the first connecting piece 21 one by one, and three sets of second connecting pieces 31 and a single second connecting piece 31 positioned at two sides are formed at the middle position of the bottom surface of the main body of the cover plate 3 due to the arrangement of the first conductive row 2A and the second conductive row 2B in the embodiment.

As shown in fig. 7, in the lower conductive row, the middle conductive row is the first conductive row 2A, the second conductive rows 2B are respectively disposed at two ends of the first conductive row 2A in the length direction, two first connecting pieces 21 formed adjacent to the first conductive row 2A and the second conductive row 2B are used for connecting with a group of second connecting pieces 31 in the cover plate 3, and the outer ends of the second conductive row 2B are not disposed with the first connecting pieces 21 due to the existence of the functional epitaxial structure.

Further, since the plurality of conductive bars 2 are arranged side by side on the supporting plate, and the connection structures of the plurality of conductive bars 2 and the cover plate 3 are staggered, the arrangement mode can enable the connection of the first connecting piece 21 and the second connecting piece 31 to form a triangular position distribution structure after the conductive bars 2 and the cover plate 3 are connected, and due to the triangular special stability structure, the conductive bars 2 and the cover plate 3 cannot deflect after being connected, so that the connection stability of the cover plate 3 and the conductive bars 2 is further improved.

In this embodiment, the conductive strip 2 and the first connecting piece 21 may be integrally formed, and since the main body of the conductive strip 2 is a strip-shaped aluminum strip, the two ends of the conductive strip 2 in the length direction are bent upwards to form the first connecting piece 21, which is convenient for processing, i.e. the first connecting piece 21 may be formed in the process of stamping and forming the conductive strip 2, and in addition, the first connecting piece 21 may form a standard piece, thereby facilitating replacement.

In addition, the connection between the main body of the conductive strip 2 and the first connecting piece 21 can adopt curved transition, which has the advantages of avoiding the formation of a folded angle at the connection between the main body of the conductive strip 2 and the first connecting piece 21, and avoiding the problem of stress concentration at the connection between the main body of the conductive strip 2 and the first connecting piece 21, so that the fracture problem can not be generated at the connection between the main body of the conductive strip 2 and the first connecting piece 21 after long-term use.

In other embodiments, the first connecting member 21 may be disposed at a non-end portion of the top surface of the conductive bar 2 by welding, but the processing cost and convenience are reduced.

Further, in this embodiment, a through connection hole 211 is formed in the middle of the first connecting member 21, and in this embodiment, the connection hole 211 may have a circular hole structure. Accordingly, the lower surface of the cover plate 3 is provided with a plurality of second connection members 31 extending toward the first connection members 21, and the second connection members 31 are arranged in the width direction of the cover plate 3. The second connection member 31 is provided with a protrusion 311 fitted to the connection hole 211, and the protrusion 311 is used to pass through the connection hole 211 to connect the conductive strip 2 and the cap plate 3.

Specifically, as shown in fig. 5 and 6, when the cover plate 3 is connected to the conductive bar 2, two adjacent first connection members 21 are assembled to the top of the conductive bar 2 from the outside of the second connection members 31, the distance between the facing surfaces of the two second connection members 31 is slightly larger than the distance between the facing surfaces of the two first connection members 21, and the protrusions 311 on the second connection members 31 are inserted into the connection holes 211 of the first connection members 21 from the outside when the cover plate 3 is connected to the conductive bar 2. In this embodiment, the protrusion 311 has a cylindrical protrusion structure, and the connection hole 211 has a circular hole structure matching the shape and size of the protrusion 311. When the protrusion 311 is inserted into the connection hole 211, the outer circumferential surface of the part of the non-chamfered structure of the protrusion 311 corresponds to the inner circumferential surface of the circular hole of the connection hole 211, and the protrusion 311 is difficult to be separated from the connection hole 211 in case of the cover plate 3 being detached unintentionally, so that the connection between the conductive bar 2 and the cover plate 3 can be more stable.

Further, since the protrusion 311 has a cylindrical structure with a shape matching the connection hole 211, the connection portion between the outer circumferential surface of the protrusion 311 and the end surface has a chamfer structure, which facilitates the protrusion 311 to pass over the first connection member 21, so that the protrusion 311 is easier to be mounted or detached from the connection hole 211, and damage to the connection portion between the outer circumferential surface of the protrusion 311 and the end surface can be avoided.

It will be appreciated that in some embodiments, some adaptations may be made, for example, that the first connector 21 may be provided with a protrusion 311 and the second connector 31 may be provided with a connection hole 211; for example, the distance between the two first connecting pieces 21 is increased, and the two second connecting pieces 31 are assembled between the two first connecting pieces 21 arranged oppositely; the technical scheme can be matched and combined arbitrarily.

In a specific application, the first connecting member 21 may have one of the connecting holes 211 or the protrusions 311 thereon; the second connecting member 31 also has the other of the connecting hole 211 or the protrusion 311; the second connecting member 31 corresponds to the first connecting member 21 in position, and the cover plate 3 is connected to the conductive bar 2 by inserting the protrusions 311 into the connecting holes 211 in such a manner that the first connecting member 21 is respectively abutted against the opposite surface or the back surface of the second connecting member 31.

In some embodiments, the connection hole 211 of the first connector 21 may be replaced by a groove, such as a cylindrical blind groove.

In this embodiment, the cover plate 3 is a strip-shaped plate body, the second connecting member 31 extends along the width direction of the cover plate 3, the second connecting member 31 may be a reinforcing rib of the cover plate 3, and due to the arrangement of the second connecting member 31, the anti-torsion performance of the whole cover plate 3 is enhanced. In this embodiment, the second connecting member 31 and the main body of the cover plate 3 may be integrally formed, for example, as an injection-molded integral piece made of plastic material.

Another embodiment of the present application also provides a battery pack including: a housing; the battery module is arranged in the shell and is the battery module. The battery pack can avoid the occurrence of the condition that the battery module is scrapped as a whole due to the damage of the clamping structure in the supporting plate due to the use of the battery module. In addition, the heat dissipation device has the advantages of good heat dissipation performance and low production cost.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative 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 in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The foregoing is merely exemplary of the present utility model, and those skilled in the art can make many variations in the specific embodiments and application scope according to the spirit of the present utility model, as long as the variations do not depart from the spirit of the utility model.

Claims (10)

1. A battery module, comprising:

a housing having an accommodating chamber formed therein for accommodating the battery cell;

the conducting bar is connected with the battery monomer, and a first connecting piece is formed on the end face of the conducting bar along the length direction;

the cover plate is correspondingly covered above the conductive bars, and a second connecting piece corresponding to the first connecting piece is formed on the lower surface of the cover plate; the first connecting piece is used for being matched with the second connecting piece to connect the conducting bar and the cover plate.

2. The battery module of claim 1, wherein the plurality of conductive bars are disposed side by side above the support plate.

3. The battery module according to claim 2, wherein the conductive strip is a first conductive strip, and both end surfaces of the first conductive strip are respectively bent upward to form the first connecting members disposed in opposition.

4. The battery module according to claim 2, wherein the conductive strip is a second conductive strip, and one end surface of the second conductive strip is bent upward to form the first connecting member.

5. The battery module according to claim 3 or 4, wherein the lower surface of the cap plate is provided with a plurality of second connection members extending in the direction of the first connection members, and the second connection members are arranged in the width direction of the cap plate.

6. The battery module of any one of claims 1-4, wherein the conductive bars are integrally formed with the first connector.

7. The battery module according to any one of claims 1 to 4, wherein the first connection member is provided with a connection hole therethrough, and the second connection member is provided with a protrusion adapted to the connection hole, the protrusion being for penetrating the connection hole to connect the conductive bar and the cap plate.

8. The battery module according to any one of claims 1 to 4, wherein the first connection member is provided with a protrusion, the second connection member is provided with a connection hole adapted to the protrusion, and the protrusion is used to pass through the connection hole to connect the conductive strip and the cap plate.

9. The battery module of claim 5, wherein the second connecting member is a reinforcing rib provided at a lower surface of the cap plate.

10. A battery pack, comprising:

a housing;

a battery module disposed within the housing, wherein the battery module is the battery module of any one of claims 1 to 9.