CN220368093U

CN220368093U - Busbar, pencil division board, battery module and battery package

Info

Publication number: CN220368093U
Application number: CN202321928885.2U
Authority: CN
Inventors: 许炳; 陈炜莹; 李进
Original assignee: GAC Aion New Energy Automobile Co Ltd
Current assignee: GAC Aion New Energy Automobile Co Ltd
Priority date: 2023-07-20
Filing date: 2023-07-20
Publication date: 2024-01-19
Anticipated expiration: 2033-07-20

Abstract

The utility model belongs to the technical field of battery packs, and provides a busbar, wire harness division board, battery module and battery pack, mainly including the contact portion that is used for being connected with electric core utmost point post, be provided with the holding tank on the contact portion, set up in the locating part of notch department of holding tank; the accommodating groove is internally provided with a phase change material. In the scheme, the accommodating groove and the limiting piece are arranged on the contact part of the busbar, meanwhile, the phase change material is filled in the accommodating groove, and the limiting piece can be used for limiting the storage state of the phase change material at the moment, so that the state stability of the phase change material is ensured; meanwhile, through the arranged phase change material, the contact part between the electrode post and the bus bar of the battery core can be subjected to heat conduction and cooling, so that under special working conditions such as high-power quick charging, the influence of the temperature rise problem between the electrode post and the bus bar of the battery core on the application performance of the battery pack can be reduced, and the application safety is improved.

Description

Busbar, pencil division board, battery module and battery package

Technical Field

The application belongs to the technical field of battery packs, and particularly relates to a busbar, a wire harness isolation plate, a battery module and a battery pack.

Background

In a conventional battery module, a bus bar is required to be arranged for electrical communication between the battery cells, the bus bar is generally made of copper metal into a block shape, and the battery cells are welded with the inner side surfaces of the bus bar through the outer side surfaces of the poles so as to realize electrical connection.

However, in the face of special working conditions, such as high-power quick charging, besides the battery core, a large temperature rise is likely to occur at the connection part between the busbar and the pole of the battery core, so that the application performance of the battery pack is affected, and potential safety hazards exist in severe cases.

Disclosure of Invention

In order to overcome at least one of the drawbacks of the prior art, an object of the present application is to provide a busbar, a harness isolation plate, a battery module and a battery pack.

The technical means adopted for solving the technical problems are as follows:

the utility model provides a busbar, including the contact portion that is used for carrying out the connection with electric core utmost point post, be provided with the holding tank on the contact portion, set up in the locating part of the notch department of holding tank;

the accommodating groove is internally provided with a phase change material.

Preferably, the limiting member is a mesh structure.

In the above preferred solution, the limiting member is provided in the form of a mesh structure, so that the heat conducting property of the phase change material in application can be improved conveniently.

Preferably, the contact portion is provided with a through hole, and the accommodating groove is wound on the outer side of the through hole.

In the above preferred solution, the accommodating groove is arranged around the outer side of the through hole, so that the heat conduction performance of the phase change material in application can be further improved.

Preferably, the contact part comprises a first contact part and a second contact part, and a connecting part is arranged between the first contact part and the second contact part;

the connecting part is bent.

In the above preferred scheme, the connecting part is arranged in a bending mode, so that the busbar can be conveniently positioned during installation, and a certain deformation amplitude can be provided, so that a certain size error is compatible during welding with the battery cell.

Also provided herein is a wire harness isolation board in which the bus bar as described above is disposed.

Preferably, the bus bar comprises a riser portion, and the bus bar is arranged in the riser portion and forms an integral structure with the riser portion.

In the above preferred scheme, the riser portion and the busbar are arranged into an integrated structure, so that the integrity and the stress performance of the wire harness isolation plate after molding can be effectively improved.

Preferably, the vertical plate further comprises a transverse plate part protruding outwards from one side surface of the vertical plate part;

the transverse plate part is provided with a mounting groove for mounting the flexible circuit board, and the mounting groove and the busbar are not overlapped with each other along the vertical direction.

In the above preferred scheme, through the arrangement of the vertical plate part and the transverse plate part, the relative separation of the high-voltage connection area and the low-voltage connection area can be conveniently realized during the electric connection, and the safety and the reliability of the electric connection are improved.

The application also provides a battery module, wherein the bus bar is arranged in the battery module;

or, the wire harness isolation board as described above is provided therein.

Preferably, the battery pack comprises a plurality of battery cells, and the notch of the accommodating groove is arranged towards the battery cells.

In the above preferred scheme, the notch of the accommodating groove is arranged towards the battery cell, so that the space restriction of the phase change material can be formed between the outer side face of the pole of the battery cell and the contact part, and the phase change material can directly act on the pole of the battery cell and the busbar, thereby better playing the role of heat conduction and cooling.

The application also provides a battery pack, wherein the battery module is arranged.

Compared with the prior art, the application has the following beneficial effects:

in the scheme, the accommodating groove and the limiting piece are arranged on the contact part of the busbar, meanwhile, the phase change material is filled in the accommodating groove, and the limiting piece can be used for limiting the storage state of the phase change material at the moment, so that the state stability of the phase change material is ensured; meanwhile, through the arranged phase change material, the contact part between the electrode post and the bus bar of the battery core can be subjected to heat conduction and cooling, so that under special working conditions such as high-power quick charging, the influence of the temperature rise problem between the electrode post and the bus bar of the battery core on the application performance of the battery pack can be reduced, and the application safety is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a bus bar of the present application.

Fig. 2 is a schematic cross-sectional view of a busbar of the present application.

Fig. 3 is a schematic structural view of the wire harness isolation board of the present application.

Fig. 4 is a schematic structural view of the wire harness isolation board of the present application.

Fig. 5 is a schematic structural view of the battery module of the present application.

Marking:

1-busbar, 11-contact, 111-first contact, 112-second contact, 113-receiving slot, 114-stopper, 115-through hole, 12-connection;

2-an electric core;

3-wire harness isolation plates, 31-vertical plate parts, 32-transverse plate parts and 321-mounting grooves;

4-a flexible circuit board;

5-battery module.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description. In addition, embodiments of the present application and features of the embodiments may be combined with each other without conflict. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, and the described embodiments are merely some, rather than all, embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model.

It should be noted that: 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 utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. Like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.

As shown in fig. 1 to 5, in this embodiment, a busbar 1 is provided, which includes a plurality of contact portions 11 and connection portions 12, wherein the contact portions 11 are used for connection, such as welding, with the poles of the battery cells 2; the connection portion 12 is used for connecting different contact portions 11, so as to realize conductive communication between the busbar 1 and the battery cell 2 and between the battery cells 2 and 2.

In some embodiments, the contact portion 11 includes a first contact portion 111 and a second contact portion 112, where the first contact portion 111 and the second contact portion 112 are respectively connected to two ends of the connection portion 12 and are symmetrically disposed.

Wherein, each contact portion 11 is provided with a receiving groove 113, and the receiving grooves 113 are filled with a phase change material, wherein the phase change material comprises paraffin, graphite and other materials with higher heat conductivity coefficients, so as to meet the thermal management requirements of the busbar 1 under various working conditions; meanwhile, a limiting member 114 is disposed at a notch of the receiving groove 113, and a filling state of the phase change material in the receiving groove 113 is ensured by the limiting member 114.

In some embodiments, the stop 114 is a mesh structure, as shown in FIG. 1; meanwhile, the limiting member 114 may be made of a material with a high thermal conductivity, such as copper, copper alloy, etc.; the limiting member 114 is configured as a mesh structure, so that the phase change material can absorb and dissipate heat rapidly, thereby improving the heat conductivity of the phase change material in application.

In some embodiments, a through hole 115 is provided on each contact portion 11, and the receiving groove 113 is wound around the outside of the through hole 115. For example, the accommodating groove 113 is provided in a circular ring shape, and in this case, the accommodating groove 113 and the through hole 115 are coaxially provided, and an inner sidewall of the accommodating groove 113 should be close to an inner sidewall of the through hole 115; by arranging the accommodation groove 113 around the outside of the through hole 115, the heat dissipation efficiency of the phase change material and the junction of the bus bar 1 and the pole of the battery cell 2 can be improved, thereby further improving the heat conduction performance of the phase change material in application.

In some embodiments, the connection portion 12 is provided in a bent configuration, for example, as shown in fig. 1, the connection portion 12 is bent in a U-shape. The connecting part 12 is arranged in a bending mode, so that the positioning of the bus bar 1 during installation can be facilitated, for example, when the bus bar 1 is installed on the wire harness isolation plate 3, the rapid positioning installation can be performed through the connecting part 12; meanwhile, a certain deformation amplitude can be provided, the stress performance is better, and certain size errors can be compatible when the battery cell 2 is welded.

In addition, in this embodiment, there is also provided a harness isolation board 3, as shown in fig. 3 and 4, in which a plurality of the bus bars 1 as described above are arranged in the harness isolation board 3. By applying the busbar 1 provided in this embodiment to the harness isolation board 3, the harness isolation board 3 may have a certain heat conducting property at the busbar 1 after installation in application, so as to improve the application effect of the harness isolation board 3 after whole package installation.

In some embodiments, the harness isolation board 3 includes a riser portion 31 and a cross plate portion 32; the busbar 1 is disposed in the riser 31, and forms an integral structure with the riser 31. By providing the riser portion 31 and the busbar 1 as an integral structure, the integrity and the stress performance of the wire harness isolation plate 3 after molding can be effectively improved.

The cross plate portion 32 protrudes outward from one side surface of the riser portion 31, and is provided in a T-shape or L-shape between the cross plate portion 32 and the riser portion 31, for example. Further, a mounting groove 321 for mounting the flexible circuit board 4 is provided on the cross plate portion 32, and the mounting groove 321 and the bus bar 1 do not overlap each other in the vertical direction. By the arrangement of the riser portion 31 and the cross plate portion 32, it is possible to facilitate the relative separation of the high-voltage connection region and the low-voltage connection region at the time of electrical connection, thereby improving the safety and reliability of electrical connection.

Further, in this embodiment, there is also provided a battery module 5, as shown in fig. 5, in which the bus bar 1 as described above is disposed in the battery module 5; alternatively, the harness isolation plate 3 described above is provided in the battery module 5. Therefore, the battery module 5 can realize heat conduction and heat dissipation operation at the busbar 1 in application, and the reliability of the battery module 5 in application is improved.

In some embodiments, the battery module 5 includes a plurality of the electric cells 2, and the poles of the electric cells 2 are disposed on the end surfaces of the two ends of the electric cells 2; when assembled, the notch of the accommodating groove 113 is disposed toward the battery cell 2. The notch of the accommodating groove 113 is arranged to face the battery core 2, so that space limitation on the phase change material can be formed between the outer side face of the pole of the battery core 2 and the contact part 11, and the phase change material can directly act on the pole of the battery core 2 and the busbar 1, thereby better playing a role in heat conduction and cooling.

In some embodiments, the notch of the accommodating groove 113 may be disposed opposite to the battery cell 2, and the phase change material performs heat conduction and dissipation on the busbar 1 more.

Further, in the present embodiment, there is also provided a battery pack in which the battery module 5 as described above is provided.

In this embodiment, the specific structural form of the battery pack may be referred to the prior art, and will not be described herein.

Compared with the prior art, the scheme of the embodiment has the following beneficial effects:

in this solution, the accommodating groove 113 and the limiting piece 114 are disposed on the contact portion 11 of the busbar 1, and meanwhile, the phase change material is filled in the accommodating groove 113, at this time, the limiting piece 114 may be used to limit the storage state of the phase change material, so as to ensure the state stability of the phase change material; meanwhile, through the arranged phase change material, heat conduction and cooling can be carried out on the contact position between the electrode column of the battery cell 2 and the busbar 1, so that under special working conditions such as high-power quick charging, the influence of the temperature rise problem between the electrode column of the battery cell 2 and the busbar 1 on the application performance of the battery pack can be reduced, and the application safety is improved.

The foregoing is merely a specific embodiment of the present application and is not intended to limit the scope of the present application, and various modifications and variations can be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application. Variations and substitutions will be readily apparent to those skilled in the art within the scope of the present disclosure, and are intended to be included within the scope of the present disclosure. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Claims

1. The busbar is characterized by comprising a contact part used for being connected with the battery cell pole, wherein the contact part is provided with a containing groove and a limiting piece arranged at a notch of the containing groove;

the accommodating groove is internally provided with a phase change material.

2. The busbar of claim 1, wherein the stop is a mesh structure.

3. The busbar according to claim 1 or 2, wherein the contact portion is provided with a through hole, and the receiving groove is wound on an outer side of the through hole.

4. The busbar of claim 3, wherein the contact portion comprises a first contact portion and a second contact portion, a connection portion being provided between the first contact portion and the second contact portion;

the connecting part is bent.

5. A wire harness insulating panel, characterized in that a busbar according to any one of the preceding claims 1 to 4 is provided therein.

6. The wire harness isolation plate of claim 5, comprising a riser portion, the buss bar being disposed within and forming a unitary structure with the riser portion.

7. The wire harness insulation board according to claim 6, further comprising a cross plate portion protruding outward from one side surface thereof;

8. A battery module characterized in that the bus bar according to any one of the preceding claims 1 to 4 is provided therein;

or, the wire harness insulation board according to any one of the preceding claims 5 to 7 is provided therein.

9. The battery module of claim 8, comprising a plurality of cells, wherein the slots of the receiving groove are disposed toward the cells.

10. A battery pack wherein the battery module of claim 8 or 9 is disposed.