CN221201371U

CN221201371U - Battery pack

Info

Publication number: CN221201371U
Application number: CN202322940731.1U
Authority: CN
Inventors: 张清清; 陈英旗; 曹楷; 曹辉
Original assignee: Shanghai Ruipu Energy Co Ltd; Rept Battero Energy Co Ltd
Current assignee: Shanghai Ruipu Energy Co Ltd; Rept Battero Energy Co Ltd
Priority date: 2023-10-31
Filing date: 2023-10-31
Publication date: 2024-06-21
Anticipated expiration: 2033-10-31

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a battery pack, which comprises: the box body is internally provided with a plurality of electric cores; the insulating frame comprises an insulating side plate and an insulating bottom plate, the insulating side plate is arranged around the inner peripheral wall of the box body, and the insulating bottom plate is arranged between the bottom of the battery cell and the bottom surface of the box body; the liquid cooling assembly is positioned in the insulating frame and comprises two parallel current collecting plates and a plurality of parallel liquid cooling plates, the two current collecting plates are communicated through the liquid cooling plates, and a containing cavity for containing the power supply core is formed between the two adjacent liquid cooling plates; according to the utility model, the insulating frame is arranged in the box body, the liquid cooling assembly and the battery cell are arranged in the insulating frame, the contact between the battery cell and the box body is effectively isolated by the insulating frame, and the insulating strength between the battery cell and the box body is enhanced; meanwhile, the insulating frame is used for replacing an insulating film at the bottom of the battery cell, foam at the inner side of the box body and foam at the bottom of the liquid cooling plate, so that the battery pack is more convenient and simpler to assemble.

Description

Battery pack

Technical Field

The utility model belongs to the technical field of batteries, and particularly relates to a battery pack.

Background

Along with the continuous development of new energy industry, the design of the battery pack is iterated continuously, and the design scheme of the battery pack in the market is changed from the traditional small-sized module structure to the large-sized module or the module-free design structure.

In the prior art, most large-scale battery pack structural designs can set up insulating film and bubble cotton in the bottom surface of electric core assembly in order to guarantee the insulating strength between electric core and the box, then set up bubble cotton in the box inboard again to separate the contact of keeping off electric core and box, play insulating effect. However, the battery pack with the structural design is troublesome in assembly, and the insulating film and the foam are easy to break, so that the insulating strength between the battery core and the box body is easy to influence.

Disclosure of utility model

The utility model aims at solving the technical problems, and provides a battery pack which achieves the effects of enhancing the insulation strength between a battery core and a box body and simplifying the battery pack.

In view of this, the present utility model provides a battery pack comprising:

the battery box comprises a box body, wherein a plurality of battery cores are arranged in the box body;

The insulation frame comprises an insulation side plate and an insulation bottom plate, the insulation side plate is arranged around the inner peripheral wall of the box body, and the insulation bottom plate is arranged between the bottom of the battery cell and the bottom surface of the box body;

The liquid cooling assembly is located the insulating frame, the liquid cooling assembly includes two parallel arrangement's current collector and a plurality of parallel arrangement's liquid cooling board, is linked together through the liquid cooling board between two current collector, is formed with the chamber that holds that the power supply core held between two adjacent liquid cooling boards.

Further, the battery cell comprises two large faces positioned at two ends of the width direction Y, and the two large faces are respectively opposite to the adjacent liquid cooling plates.

Furthermore, the ends of the two current collecting plates are respectively provided with a current collecting pipe, and the insulating frame is provided with an extension part matched with the current collecting pipes.

Furthermore, the collecting pipe is connected with a pipeline for liquid inlet or liquid outlet, and the extension part is provided with an opening for the pipeline to pass through.

Further, a plurality of buffer pieces are arranged between two adjacent battery cells.

Further, a heat conducting piece is arranged between the battery cell and the liquid cooling plate.

Furthermore, the heat conducting piece is made of heat conducting structural adhesive, and a limiting strip is arranged between the large surface of the battery cell and the liquid cooling plate.

Further, the outer wall of the liquid cooling assembly is abutted with the inner wall of the insulating frame.

Further, the insulating frame is fixedly adhered to the box body.

The beneficial effects of the utility model are as follows:

1. An insulating frame is arranged in the box body, then the liquid cooling assembly and the battery cell are arranged in the insulating frame, and the contact between the battery cell and the box body is effectively isolated through the insulating frame, so that the insulating strength of the battery cell and the box body is enhanced; meanwhile, the insulating film at the bottom of the battery cell, foam at the inner side of the box body and foam at the bottom of the liquid cooling plate are effectively replaced by the design of the insulating frame, so that the battery pack is more convenient and simpler to assemble.

2. Certain gaps are reserved between the large surface of the battery cell and the large surface of the adjacent battery cell and between the small surface of the battery cell and the small surface of the adjacent battery cell, and then compressible substances are filled in the gaps so as to meet the requirements of process welding, insulation safety design and expansion space reservation.

3. The heat conduction structural adhesive and the limiting strips are arranged between the battery cell and the liquid cooling plate, the heat exchange between the battery cell and the liquid cooling plate is realized by utilizing the heat conduction structural adhesive, and meanwhile, the connection strength of the battery cell, the liquid cooling plate and the insulating frame is improved; the outer wall of insulating frame is glued through the structure and is fixed with the box, improves the holistic structural strength of battery package, and insulating frame's heat conduction structure that can also prevent between inside electric core glues and flows the box inboard, avoids two kinds of glues to mix mutually.

Drawings

Fig. 1 is a schematic view of the overall structure of a battery pack according to an embodiment of the present utility model;

Fig. 2 is an exploded view showing the overall structure of a battery pack according to an embodiment of the present utility model;

Fig. 3 is a schematic overall structure of another view of a battery pack according to an embodiment of the present utility model;

FIG. 4 is an enlarged schematic view of the structure of FIG. 3 at A in accordance with the present utility model;

FIG. 5 is an enlarged schematic view of the structure of FIG. 3 at B in accordance with the present utility model;

FIG. 6 is an enlarged schematic view of a portion of a cell of the present utility model;

FIG. 7 is an enlarged schematic view of a portion of a cell from another perspective in accordance with the present utility model;

FIG. 8 is a schematic view of an insulating frame according to the present utility model;

The label in the figure is:

1. A case; 2. a battery cell; 3. an insulating frame; 31. an insulating side plate; 32. an insulating base plate; 33. an extension part; 4. a liquid cooling assembly; 41. a current collecting plate; 42. a liquid cooling plate; 43. a receiving chamber; 44. collecting pipes; 45. a pipe; 5. a buffer member; 51. a limit bar; 6. a heat conducting structural adhesive; 7. structural adhesive; x-length direction; y-width direction.

Detailed Description

The technical solutions of the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the description of the present application, it is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments in accordance with the present application. For ease of description, the dimensions of the various features shown in the drawings are not drawn to actual scale. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Example 1:

the present embodiment provides a battery pack including:

the battery box comprises a box body 1, wherein a plurality of battery cells 2 are arranged in the box body 1;

The insulation frame 3 comprises an insulation side plate 31 and an insulation bottom plate 32, wherein the insulation side plate 31 is arranged around the inner peripheral wall of the box body 1, and the insulation bottom plate 32 is arranged between the bottom of the battery cell 2 and the bottom surface of the box body 1;

The liquid cooling assembly 4, the liquid cooling assembly 4 is located the insulating frame 3, the liquid cooling assembly 4 includes two parallel arrangement's current collector 41 and a plurality of parallel arrangement's liquid cooling board 42, is linked together through the liquid cooling board 42 between two current collector 41, is formed with the accommodation chamber 43 that the power supply core 2 held between two adjacent liquid cooling boards 42.

In the technical scheme, the insulating frame 3 is arranged in the box body 1, and after the insulating frame 3 can be formed by casting materials such as cast steel or cast aluminum, a layer of insulating film is stuck on the surface or a layer of insulating coating is sprayed, wherein the insulating film can be a pet film, so that the insulativity of the insulating frame is ensured, and meanwhile, the strength of the insulating frame is also ensured; the liquid cooling assembly 4 is arranged in the insulating frame 3, the liquid cooling assembly 4 consists of two mutually parallel current collecting plates 41 and a plurality of liquid cooling plates 42, the plurality of liquid cooling plates 42 are mutually parallel and are arranged at the same distance, the liquid cooling plates 42 are in a harmonica shape, two ends of each liquid cooling plate 42 are respectively connected with the two current collecting plates 41, and an inner flow passage of each liquid cooling plate 42 is communicated with an inner flow passage of the current collecting plate 41, so that the two current collecting plates 41 are communicated through the plurality of liquid cooling plates 42.

A containing cavity 43 for containing the power core 2 is formed between two adjacent liquid cooling plates 42 and two current collecting plates 41, the power core 2 is arranged in the insulating frame 3 and is positioned in the containing cavity 43, the circumferential wall of the power core 2 is in contact with the liquid cooling plates 42, and the cooling liquid flowing in the liquid cooling plates 42 is utilized to absorb heat generated by the power core 2, so that the cooling and heat dissipation effects are achieved.

The battery cell 2 is arranged on the insulating bottom plate 32 in the insulating frame 3, so that the insulating strength between the bottom of the battery cell 2 and the box body 1 is ensured, and the insulating film is not required to be arranged at the bottom of the battery cell 2, and foam is not required to be arranged at the bottom of the liquid cooling assembly 4 for insulation; the insulating side plate 31 surrounds the inner peripheral wall of the box body 1, has a limiting function in the horizontal direction on the liquid cooling assembly 4 and the whole battery cell 2, and simultaneously ensures the insulating strength between the peripheral side wall of the battery cell 2 and the box body 1, so that foam is not required to be arranged on the inner side of the box body 1 for insulation.

Through the structural design, the insulating frame 3 is arranged in the box body 1, then the liquid cooling assembly 4 and the battery cell 2 are arranged in the insulating frame 3, and the contact between the battery cell 2 and the box body 1 is effectively isolated through the insulating frame 3, so that the insulating strength of the battery cell 2 and the box body 1 is enhanced; meanwhile, the insulating film at the bottom of the battery cell 2, foam at the inner side of the box body 1 and foam at the bottom of the liquid cooling plate 42 are effectively replaced by the design of the insulating frame 3, so that the battery pack is assembled more conveniently and simply, and the practicability is improved.

Example 2:

The present embodiment provides a battery pack having the following technical features in addition to the technical scheme including the above embodiments.

Further, the battery core 2 includes two large faces located at two ends of the width direction Y, and the two large faces are respectively opposite to the adjacent liquid cooling plates 42.

In this technical scheme, electric core 2 is located and holds chamber 43, and two big faces at electric core 2 width direction Y both ends just set up two adjacent liquid cooling board 42 respectively, utilize two big faces of electric core 2 to carry out direct or indirect contact with liquid cooling board 42, realize electric core 2 and liquid cooling board 42's heat exchange, increase electric core 2 and liquid cooling board 42's heat exchange area through this structural design, reinforcing liquid cooling board 42 is to electric core 2's cooling effect for electric core 2's radiating effect is better.

Example 3:

The embodiment provides a battery pack, which has the following technical characteristics on the basis of the technical scheme of any embodiment.

Further, the ends of the two collecting plates 41 are respectively provided with a collecting pipe 44, and the insulating frame 3 is provided with an extension part 33 adapted to the collecting pipes 44.

Further, the collecting pipe 44 is connected with a pipe 45 for liquid inlet or liquid outlet, and the extension part 33 is provided with an opening for the pipe 45 to pass through.

In the technical scheme, a collecting pipe 44 integrally connected with one end of a collecting plate 41 is arranged, and an external cooling liquid conveying system conveys cooling liquid to the collecting plate 41 through the collecting pipe 44; then, the insulating frame 3 is provided with an integrally connected extension part 33, the structure of the extension part 33 is matched with the collecting pipe 44, and the collecting pipe 44 is arranged in the extension part 33.

A pipe 45 for liquid inlet or outlet is installed on the collecting pipe 44, and then an opening is designed on the extension part 33 for the pipe 45 to pass through. The cooling liquid flows into the collecting pipe 44 from the pipeline 45 of one collecting pipe 44, enters the collecting plate 41 communicated with the collecting pipe 44, then flows through the liquid cooling plate 42 to generate heat exchange with the battery cell 2, absorbs heat generated by the battery cell 2, then enters the other collecting plate 41, finally flows out from the pipeline 45 on the collecting pipe 44 integrally connected with the other collecting plate 41, and further flows to an external cooling liquid conveying system, so that the circulating flow of the cooling liquid in the liquid cooling assembly 4 is realized, and the cooling and heat dissipation effects on the battery cell 2 are realized.

Example 4:

Further, a plurality of buffer members 5 are arranged between two adjacent battery cells 2.

In the technical scheme, a plurality of battery cells 2 are arranged in an insulating frame 3 and are respectively positioned in each accommodating cavity 43 to form a battery cell 2 assembly; one holds the intracavity and can be equipped with only one row of electric core 2, also can have two rows or multirow electric core 2, reserves certain clearance between two adjacent electric cores 2 on electric core 2 length direction X, is equipped with buffer 5 in the clearance, can avoid the facet on two adjacent electric core 2 length direction X to take place extrusion and collision when the inflation through setting up buffer 5.

A certain gap is reserved between two adjacent cells 2 or between the adjacent cells 2 and the liquid cooling plate 42 in the width direction Y of the cells 2, and a buffer piece 5 is also arranged in the gap, wherein the buffer piece 5 can prevent the large faces of the two adjacent cells 2 from mutually extruding and colliding when the cells 2 are expanded or prevent the large faces of the cells 2 from extruding and damaging the adjacent liquid cooling plate 42 when the cells 2 are expanded.

The cushioning member 5 may be foam, or may be some other compressible material, such as a rubber pad.

Through the structural design, a certain gap is reserved between the small face of the battery cell 2 and the small face of the adjacent battery cell 2, a certain gap is reserved between the large face of the battery cell 2 and the large face of the adjacent battery cell 2, or a gap is reserved between the large face of the battery cell 2 and the adjacent liquid cooling plate 42, and then compressible substances are filled in the gap so as to meet the requirements of process welding, insulation safety design and expansion space reservation.

Example 5:

Further, a heat conducting member is disposed between the battery cell 2 and the liquid cooling plate 42.

Further, the heat conducting member is a heat conducting structural adhesive 6, and a limit strip 51 is further disposed between the battery cell 2 and the liquid cooling plate 42.

In this technical scheme, pack in the place that has the clearance between electric core 2 and liquid cooling board 42 and be equipped with the heat conduction spare, electric core 2 carries out the heat exchange with liquid cooling board 42 through the heat conduction spare with self heat to realize electric core 2's cooling, heat dissipation. The limiting strips 51 are attached to the large faces of the battery cells 2, when the battery cells 2 are installed in the insulating frame 3 and are located in the containing cavity 43, the limiting strips 51 on the two large faces of the battery cells 2 are respectively abutted against the liquid cooling plates 42 adjacent to the large faces, and gaps between the battery cells 2 and the liquid cooling plates 42 are filled by the limiting strips 51, so that the installation and setting of the battery cells 2 in the containing cavity 43 are positioned. The limiting strip 51 can be foam, has certain elasticity, is positioned between the battery cell 2 and the liquid cooling plate 42, can serve as a buffer piece 5 on the large surface of the battery cell 2 to play a role in buffering, and avoids the expansion of the battery cell 2 and the extrusion and collision of the liquid cooling plate 42.

Preferably, the heat conducting piece adopts heat conduction structure to glue 6, and electric core 2 locates in holding chamber 43, fills heat conduction structure in to insulating frame 3 and glues 6, and heat conduction structure glues 6 and makes electric core 2 and liquid cooling board 42 and insulating bottom plate 32 bond fixedly, improves electric core 2 and liquid cooling board 42's joint strength, and electric core 2 can realize heat exchange through heat conduction structure glues 6 and liquid cooling board 42 simultaneously.

Example 6:

Further, the outer wall of the liquid cooling assembly 4 is abutted against the inner wall of the insulating frame 3.

In this technical scheme, the outer wall of the current collecting plate 41 in the liquid cooling assembly 4 and the butt of insulating frame 3, when filling heat conduction structure glue 6 in to insulating frame 3, heat conduction structure glue 6 fills to the place that has the clearance between electric core 2 and the liquid cooling plate 42, and part heat conduction structure glue 6 can permeate between current collecting plate 41 and the insulating curb plate 31, glues current collecting plate 41 and insulating curb plate 31 through heat conduction structure glue 6 and fixes together to further strengthened the connection fastness of liquid cooling assembly 4 and insulating frame 3, improved the holistic structural strength of battery package.

Example 7:

Further, the insulating frame 3 is adhered and fixed to the case 1.

In the technical scheme, the outer wall of the insulating frame 3 is adhered and fixed with the box body 1 through the structural adhesive 7, so that the connection firmness of the insulating frame 3 and the box body 1 is enhanced; the bottom of electric core 2 is glued 6 fixedly through heat conduction structure with the bottom of insulating frame 3, and the bottom of insulating frame 3 is glued 7 fixedly through the structure with box 1 for the atress of electric core 2 can be transmitted to the bottom plate of box 1, thereby makes the overall structure of battery package more stable, improves the holistic structural strength of battery package. In addition, the insulating frame 3 can also prevent the heat conduction structural adhesive 6 between the internal battery cores 2 from flowing to the inner side of the box body 1, so that the two adhesives are prevented from being mixed.

The embodiments of the present application have been described above with reference to the accompanying drawings, in which the embodiments of the present application and features of the embodiments may be combined with each other without conflict, the present application is not limited to the above-described embodiments, which are merely illustrative, not restrictive, of the present application, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are protected by the present application.

Claims

1. A battery pack, comprising:

the battery pack comprises a box body (1), wherein a plurality of battery cells (2) are arranged in the box body (1);

The insulation frame (3), the insulation frame (3) comprises an insulation side plate (31) and an insulation bottom plate (32), the insulation side plate (31) is arranged around the inner peripheral wall of the box body (1), and the insulation bottom plate (32) is arranged between the bottom of the battery cell (2) and the bottom surface of the box body (1);

The liquid cooling assembly (4), liquid cooling assembly (4) are located insulating frame (3), liquid cooling assembly (4) are including two parallel arrangement's collector plate (41) and a plurality of parallel arrangement's liquid cooling board (42), are linked together through liquid cooling board (42) between two collector plates (41), are formed with holding chamber (43) that supply core (2) held between two adjacent liquid cooling boards (42).

2. A battery pack according to claim 1, wherein the cell (2) includes two large faces located at both ends in the width direction Y, the two large faces being disposed opposite to the adjacent liquid cooling plates (42), respectively.

3. A battery pack according to claim 1, wherein the ends of both collector plates (41) are provided with a collector (44), and the insulating frame (3) is provided with an extension (33) adapted to the collector (44).

4. A battery pack according to claim 3, wherein the header (44) is connected to a pipe (45) for liquid inlet or outlet, and the extension (33) is provided with an opening through which the pipe (45) passes.

5. A battery pack according to claim 1, wherein several buffers (5) are provided between two adjacent cells (2).

6. A battery pack according to claim 1, wherein a heat conducting member is provided between the battery cell (2) and the liquid cooling plate (42).

7. The battery pack according to claim 6, wherein the heat conducting member is a heat conducting structural adhesive (6), and a limit strip (51) is further arranged between the battery cell (2) and the liquid cooling plate (42).

8. A battery pack according to claim 1, wherein the outer wall of the liquid cooling assembly (4) abuts against the inner wall of the insulating frame (3).

9. A battery pack according to claim 1, wherein the insulating frame (3) is adhesively secured to the case (1).