CN218299938U

CN218299938U - Cooling assembly and battery module

Info

Publication number: CN218299938U
Application number: CN202222263205.1U
Authority: CN
Inventors: 汪展展
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2023-01-13
Anticipated expiration: 2032-08-26

Abstract

The utility model discloses a cooling module and battery module belongs to battery technical field. The cooling assembly is used for cooling the battery cell and comprises a first cold plate and a second cold plate, the first cold plate is arranged at the end part of the battery cell, a first flow channel is arranged in the first cold plate, and the first flow channel can be communicated with an external cooling device; the periphery of electric core is located to the cold board of second, and the cold inboard portion of second is equipped with the second runner, and the second runner can communicate with external cooling device. The utility model discloses a cooling module and battery module have improved cooling capacity, have prolonged the life of electric core.

Description

Cooling assembly and battery module

Technical Field

The utility model relates to a battery technology field especially relates to a cooling module and battery module.

Background

The requirement of pure electric vehicle users on the endurance mileage is higher and higher, so that the energy of the battery cell is higher and higher, and the requirement on the quick charging time is shorter and shorter, so that the quick charging rate is higher and higher, and the battery cell is cooled by the cooling plate. Traditional cooling device includes the cooling plate, and the cooling plate cools off the one end of electric core, but can lead to the difference in temperature at electric core both ends great, and electric core decay is inconsistent and electric core internal resistance is inconsistent, forms vicious circle, has influenced the life of electric core.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a cooling module and battery module improve the cooling capacity, prolong the life of electric core.

To achieve the purpose, the utility model adopts the following technical proposal:

in one aspect, a cooling assembly is provided for cooling a battery cell, including:

the first cold plate is arranged at the end part of the battery core, a first flow channel is arranged in the first cold plate, and the first flow channel can be communicated with an external cooling device;

the second cold plate is arranged on the periphery of the battery cell, a second flow channel is arranged inside the second cold plate, and the second flow channel can be communicated with an external cooling device.

In some possible embodiments, the first flow channel is in series with the second flow channel; or the first flow channel and the second flow channel are connected in parallel.

In some possible embodiments, the first cold plate includes a first connection plate and a second connection plate, the first connection plate is a flat plate, the second connection plate is provided with a groove, the first connection plate is covered in the groove to form the first flow channel, and the battery cell is connected to the first connection plate.

In some possible embodiments, when a plurality of cell assemblies are provided, the first flow channel includes a main flow channel and a plurality of first branch flow channels connected in parallel, the main flow channel is communicated with the plurality of first branch flow channels, the plurality of first branch flow channels are arranged along the arrangement direction of the plurality of cell assemblies, and the cell assemblies are located above the first branch flow channels.

In some possible embodiments, the battery core group comprises a plurality of battery cell rows, and a spoiler is arranged inside the first cold plate and located between two battery cell rows.

In some possible embodiments, the battery cell is a cylindrical battery cell, the second cold plate includes a snake-shaped flat tube, the second flow channel is arranged in the snake-shaped flat tube, and the side surface of the snake-shaped flat tube is attached to the outer peripheral surface of the cylindrical battery cell.

In some possible embodiments, a plurality of partition plates are arranged inside the second cold plate, the partition plates divide the second flow channel into a plurality of second branch flow channels which are connected in parallel, and the plurality of second branch flow channels are arranged along the height direction of the battery core.

In some possible embodiments, the second cold plate includes a serpentine flat tube and a current collector disposed at two ends of the serpentine flat tube, the partition plate is disposed in the serpentine flat tube, and the current collector is communicated with the second branch flow passage.

In some possible embodiments, the partition is parallel to a length direction of the second cold plate; and/or

The plurality of the partition plates are arranged in parallel at intervals.

In another aspect, a battery module is provided, which includes a battery core and the cooling assembly.

The utility model has the advantages that:

the utility model provides a pair of cooling module and battery module, during the use, external cooling device is used for providing fluids such as endless coolant liquid in first runner and the second runner to change the temperature of electric core. The heat conductivity coefficient of the battery cell along the axial direction is far larger than that of the battery cell along the radial direction, and the first cold plate is arranged at the end part of the battery cell, so that the heat transfer efficiency of the battery cell is improved; because the one end of electric core is located to first cold plate, can cause electric core to be close to first cold plate and keep away from first cold plate one end along the direction of height and have the difference in temperature, locate the periphery of electric core through the second cold plate, reduced the difference in temperature of electric core along the direction of height, reduced electric core decay rate, prolonged life. The end part and the periphery of the battery core are simultaneously cooled through the first cold plate and the second cold plate, so that the cooling capacity is greatly improved, the temperature in the high-temperature quick charging process can be reduced, the problem of overhigh temperature of the high-temperature high-rate rechargeable battery is solved, and the service life of the battery is further prolonged.

Drawings

FIG. 1 is a schematic diagram of a cooling module according to an embodiment of the present invention;

FIG. 2 is an enlarged view at A of FIG. 1;

fig. 3 is a schematic structural diagram of a second connecting plate according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a serpentine flat tube according to an embodiment of the present invention;

fig. 5 is an enlarged view of fig. 4 at B.

In the figure:

100. an electric core;

1. a first cold plate; 11. a first connecting plate; 12. a second connecting plate; 121. a first groove; 122. a second groove; 13. a spoiler; m, a first flow channel;

2. a second cold plate; 21. a partition plate; 22. a snake-shaped flat pipe; 23. a current collector; 24. a pipe joint; n, a second flow channel; n1, a second branch flow channel;

3. a pipeline.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solutions adopted by the present invention, and the technical effects achieved by the present invention clearer, the following detailed description will be made with reference to the accompanying drawings for further describing the technical solutions of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts all belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The present embodiment provides a battery module, as shown in fig. 1, including a battery cell 100 and a cooling assembly, where the cooling assembly is configured to cool the battery cell 100. The present embodiment further provides a cooling assembly, as shown in fig. 1 to fig. 5, including a first cold plate 1 and a second cold plate 2, where the first cold plate 1 is disposed at an end of the electrical core 100, a first flow channel M is disposed inside the first cold plate 1, and the first flow channel M can be communicated with an external cooling device; the periphery of electric core 100 is located to second cold plate 2, and second runner N is equipped with to second cold plate 2 inside, and second runner N can communicate with external cooling device.

When in use, the external cooling device is used to provide a fluid such as a circulating cooling liquid into the first flow channel M and the second flow channel N, so as to change the temperature of the battery cell 100. As the heat conductivity coefficient of the battery cell 100 along the axial direction is much larger than the radial heat conductivity coefficient, the first cold plate 1 is arranged at the end part of the battery cell 100, so that the heat transfer efficiency of the battery cell 100 is improved; because the one end of electric core 100 is located to first cold drawing 1, can cause electric core 100 to be close to first cold drawing 1 along the direction of height and keep away from first cold drawing 1 one end and have the difference in temperature, locate the periphery of electric core 100 through second cold drawing 2, reduced electric core 100 along the difference in temperature of direction of height, reduced electric core 100 decay rate, prolonged life. Through the end and the periphery that first cold board 1 and second cold board 2 were cooled off from electric core 100 simultaneously, improved cooling capacity greatly, can reduce the temperature of high temperature fast charge in-process, solved the problem of the big multiplying power rechargeable battery high temperature of high temperature, and then prolonged the life of battery.

Optionally, this scheme also can be used to the low temperature heating operating mode, can heat electric core 100 fast, adjusts the fluid temperature in first runner M and the second runner N and can be applicable to cooling condition or heating operating mode.

Further, the first cold plate 1 may be disposed at the bottom of the battery cell 100, may also be disposed at the top of the battery cell 100, and two first cold plates 1 may also be disposed at the bottom and the top of the battery cell 100, respectively, and are disposed according to requirements, without limitation.

In one embodiment, as shown in fig. 1, the first flow channel M and the second flow channel N are connected in series, thereby reducing input and output connections and simplifying the structure. Further, the first cold plate 1 may be located upstream of the second cold plate 2, or may be located downstream of the first cold plate 1. In another embodiment, the first flow channel M and the second flow channel N are connected in parallel, the first flow channel M and the second flow channel N are respectively communicated with an external cooling device, the first cold plate 1 and the second cold plate 2 do not influence each other, the length of the flow channels is reduced, and the cooling effect is further improved.

As shown in fig. 1, the first direction is an X direction, the second direction is a Y direction, the third direction is a Z direction, and the first direction, the second direction and the third direction are perpendicular to each other two by two. The battery module comprises a plurality of electric core groups, each electric core group comprises a plurality of electric core rows arranged along the second direction, each electric core row comprises a plurality of electric cores 100 arranged along the first direction, and one electric core group is shown in the figure.

In one embodiment, as shown in fig. 1 to 3, the first cooling plate 1 includes a first connecting plate 11 and a second connecting plate 12, the first connecting plate 11 is a flat plate, the second connecting plate 12 is provided with a groove, the first connecting plate 11 is covered on the groove to form a first flow channel M, the battery cells 100 are connected to the first connecting plate 11, it is ensured that all the battery cells 100 mounted on the first connecting plate 11 are located at the same height, and it is ensured that the structure is flush. First cold plate 1 is the punching press board, is equipped with the recess on one of them, reduces the processing degree of difficulty. In other embodiments, grooves may be formed on the first connecting plate 11 and the second connecting plate 12, respectively, to form the first flow channels M.

In one embodiment, when a plurality of electric core groups are arranged, the first flow channel M comprises a main flow channel and a plurality of parallel first branch flow channels, the main flow channel is communicated with the plurality of first branch flow channels, and the plurality of first branch flow channels are arranged along the arrangement direction of the plurality of electric core groups, so that the temperature difference among the plurality of first branch flow channels is reduced, the consistency of the cooling temperature of the plurality of electric core groups is improved, the temperature difference is reduced, and the cooling effect is improved; and the electric core group is positioned above the first branch flow channel, so that the cooling efficiency of the electric core group is further improved. Specifically, both the inlet and the outlet of the first branch flow passage may be communicated with the total flow passage, or one of the inlet and the outlet may be communicated with the total flow passage.

As shown in fig. 1 to 3, each first branch flow channel of the first cold plate 1 is provided with an inlet, and the fluid in the plurality of first branch flow channels is merged by the total flow channel and then flows out. Further, the total flow path may be provided with a plurality of outlets or may be provided with only one outlet, which is not limited.

In one embodiment, the battery cell group includes a plurality of battery cell rows, and a spoiler 13 is disposed inside the first cold plate 1, where the spoiler 13 improves the fluid flowing effect in the first flow channel M. Referring to fig. 3, the grooves include a first groove 121 and a second groove 122 that are communicated with each other, the first connecting plate 11 is covered on the first groove 121 to form a first branch flow channel, and the first connecting plate 11 is covered on the second groove 122 to form a second flow channel N. The spoiler 13 is located in the first groove 121, one end of the first groove 121 close to the second groove 122 is divided into two separation grooves by the spoiler 13, one ends of the two separation grooves, which are far away from the second groove 122, are communicated, and the two separation grooves are respectively communicated with the total flow channel. The spoiler 13 is located between the two battery cell rows, so that the battery cell 100 is located above the separation groove, and the fluid circulates under the battery cell 100, thereby improving the cooling effect. Further, the inlet of the first cold plate 1 is disposed on the first connecting plate 11, the fluid enters the first groove 121 and then is divided by the spoiler 13 into the two separation grooves, and then flows into the main flow channel, so that the two separation grooves and the first connecting plate 11 form flow channels respectively, and the two flow channels are connected in parallel, thereby further reducing the temperature difference between the plurality of cell rows in the same group, and improving the cooling effect.

In an embodiment, as shown in fig. 1 and fig. 4, electric core 100 is a cylindrical electric core, and the second cold plate 2 includes the snakelike flat pipe 22, and the inside second runner N that is equipped with of the snakelike flat pipe 22, the side of the snakelike flat pipe 22 is circular-arc to paste the outer peripheral face of locating the cylindrical electric core, increase the area of contact of cylindrical electric core and snakelike flat pipe 22, improve the cooling effect. A plurality of batteries 100 in the battery row are arranged along the length direction of snakelike flat pipe 22, and the width direction of snakelike flat pipe 22 parallels with the direction of height of battery 100.

In an embodiment, as shown in fig. 4 and 5, a plurality of partition plates 21 are disposed inside the second cold plate 2, the partition plates 21 partition the second flow channel N into a plurality of second branch flow channels N1 connected in parallel, and the plurality of second branch flow channels N1 are arranged along the height direction of the battery cell 100, so that the uniformity of the fluid flowing in the plurality of second branch flow channels N1 is improved, the uniformity of the cooling of the battery cell 100 along the height direction is improved, and the cooling effect is improved.

In an embodiment, as shown in fig. 4 and 5, when the second flow channel N is arranged along the length direction of the serpentine flat tube 22, the second cold plate 2 includes the serpentine flat tube 22 and the current collectors 23 disposed at both ends of the length direction of the serpentine flat tube 22, the partition plate 21 is disposed in the serpentine flat tube 22 along the length direction of the serpentine flat tube 22, so that the second branch flow channel N1 is disposed along the length direction of the serpentine flat tube 22, the current collectors 23 are communicated with the second branch flow channel N1, the current collectors 23 are provided with the tube connectors 24, the serpentine flat tube 22 is connected with other structures through the current collectors 23, the fluid is shunted into the second branch flow channels N1 after passing through the current collectors 23, the fluid in the branch flow channels is collected into the current collectors 23 again, and the second cold plate 2 is conveniently connected with other structures. In another embodiment, the second flow channel N may also be disposed along the width direction of the serpentine flat tube 22, the second cold plate 2 includes the serpentine flat tube 22 and the current collectors 23 disposed at two ends of the serpentine flat tube 22 in the width direction, and the partition plate 21 is disposed in the serpentine flat tube 22, so that the second branch flow channel N1 is disposed along the width direction of the serpentine flat tube 22.

When a plurality of second cold plates 2 are provided, two current collectors 23 of the second cold plates 2, one current collector 23 is connected with an external device, and the other current collector is connected with the adjacent current collector 23; or the two current collectors 23 are respectively connected with an external device; or the two current collectors 23 are respectively connected with the adjacent current collectors 23, and only the two current collectors 23 positioned at the end parts are respectively connected with an external device; the external device may be an external cooling device or the first cold plate 1, which is determined according to whether the first flow channel M and the second flow channel N are connected in series or in parallel.

In one embodiment, the partition 21 is parallel to the length direction of the second cold plate 2, so that the flow channel section of the second branch flow channel N1 along the height direction of the battery cell 100 is uniform; in another embodiment, the partition 21 is parallel to the width direction of the second cold plate 2, so that the flow channel section of the second branch flow channel N1 along the peripheral direction of the battery cell 100 is uniform. In an embodiment, the plurality of partition plates 21 are arranged in parallel at intervals, so that the flow channel cross sections of the plurality of second branch flow channels N1 are the same, and the cooling uniformity of the battery cell 100 is improved.

Further, the first cold plate 1 and the second cold plate 2 are respectively connected with a pipeline 3. Further, the pipeline 3 is connected with the current collector 23 and the first cold plate 1 by welding or by a pipe joint 24.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. 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 claims of the present invention.

Claims

1. A cooling assembly for cooling a battery cell (100), comprising:

the first cold plate (1) is arranged at the end part of the battery core (100), a first flow channel (M) is arranged inside the first cold plate (1), and the first flow channel (M) can be communicated with an external cooling device;

the second cold plate (2) is arranged on the periphery of the battery core (100), a second flow channel (N) is arranged inside the second cold plate (2), and the second flow channel (N) can be communicated with an external cooling device.

2. A cooling assembly according to claim 1, characterized in that said first flow channel (M) is in series with said second flow channel (N); or the first flow channel (M) and the second flow channel (N) are connected in parallel.

3. The cooling assembly according to claim 1, characterized in that the first cold plate (1) comprises a first connecting plate (11) and a second connecting plate (12), the first connecting plate (11) is a flat plate, the second connecting plate (12) is provided with a groove, the first connecting plate (11) is covered in the groove to form the first flow channel (M), and the battery cells (100) are connected to the first connecting plate (11).

4. The cooling module according to claim 1, wherein when a plurality of cell groups are provided, the first flow path (M) includes a main flow path and a plurality of parallel first branch flow paths, the main flow path communicates with the plurality of first branch flow paths, the plurality of first branch flow paths are arranged along the arrangement direction of the plurality of cell groups, and the cell groups are located above the first branch flow paths.

5. The cooling assembly according to claim 4, characterized in that the battery core group comprises a plurality of battery cell rows, and a spoiler (13) is arranged inside the first cold plate (1), wherein the spoiler (13) is located between two battery cell rows.

6. The cooling assembly according to any one of claims 1 to 5, wherein the battery cell (100) is a cylindrical battery cell, the second cooling plate (2) comprises a serpentine flat tube (22), the second flow channel (N) is arranged inside the serpentine flat tube (22), and the side surface of the serpentine flat tube (22) is attached to the outer peripheral surface of the cylindrical battery cell.

7. The cooling assembly according to any one of claims 1 to 5, wherein a plurality of partition plates (21) are arranged inside the second cold plate (2), the partition plates (21) divide the second flow channel (N) into a plurality of second branch flow channels (N1) which are connected in parallel, and the plurality of second branch flow channels (N1) are arranged along the height direction of the battery core (100).

8. The cooling assembly according to claim 7, wherein the second cold plate (2) comprises a serpentine flat tube (22) and a current collector (23) arranged at two ends of the serpentine flat tube (22), the separator (21) is arranged in the serpentine flat tube (22), and the current collector (23) is communicated with the second branch flow channel (N1).

9. The cooling assembly of claim 7,

the partition (21) is parallel to the length direction of the second cold plate (2); and/or

The plurality of partition plates (21) are arranged in parallel at intervals.

10. A battery module comprising a cell and the cooling assembly of any one of claims 1-9.