CN115842192A

CN115842192A - Liquid cooling system and battery module

Info

Publication number: CN115842192A
Application number: CN202211441490.XA
Authority: CN
Inventors: 邱文聪; 陈智伟; 李凡
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2022-11-17
Filing date: 2022-11-17
Publication date: 2023-03-24

Abstract

The invention discloses a liquid cooling system and a battery module, and belongs to the technical field of batteries. The liquid cooling system comprises a plurality of liquid cooling monomers and a plurality of connecting pipes, the liquid cooling monomers are provided with cavities, the connecting pipes are detachably connected with the liquid cooling monomers, the connecting pipes are communicated with the cavities, two adjacent liquid cooling monomers are connected in series through the connecting pipes, and the liquid cooling monomers are provided with cooling surfaces matched with at least partial side surfaces of the battery core in shape. According to the liquid cooling system and the battery module, the liquid cooling system can be adjusted according to the battery core in the battery module, so that the applicability is improved; avoid adopting the integral type liquid cooling board of traditional structure, correspond the die sinking to different battery module, this liquid cooling system reduce the cost.

Description

Liquid cooling system and battery module

Technical Field

The invention relates to the technical field of batteries, in particular to a liquid cooling system and a battery module.

Background

The battery module comprises an electric core and a liquid cooling system, the liquid cooling system cools the electric core, and when the electric core generates a large amount of heat during quick charging or high-power discharging, the influence on the service life caused by overhigh temperature is avoided. In the prior art, a liquid cooling system adopts a liquid cooling plate, cooling liquid is supplied to the liquid cooling plate, and the electric core is cooled through heat exchange between the cooling liquid and the electric core. However, the liquid cooling plates are of an integrated structure, and when the number of the battery cells contained in different battery modules is different or the arrangement modes are different, the used liquid cooling plates are also different, so that the corresponding liquid cooling plates are required to be opened when different battery modules are manufactured, and the cost is increased.

Disclosure of Invention

The invention aims to provide a liquid cooling system and a battery module, wherein the liquid cooling system can be adjusted according to a battery core in the battery module, so that the applicability is improved, and the cost is reduced.

In order to achieve the purpose, the invention adopts the following technical scheme:

on the one hand, the liquid cooling system comprises a plurality of liquid cooling monomers and a plurality of connecting pipes, wherein the liquid cooling monomers are provided with cavities, the connecting pipes are detachably connected with the liquid cooling monomers, the connecting pipes are communicated with the cavities, every two adjacent liquid cooling monomers pass through the connecting pipes in series connection, and the liquid cooling monomers are provided with cooling surfaces matched with at least partial side shapes of the electric core.

In some possible embodiments, the top end of the liquid cooling unit is provided with an interface communicated with the cavity, and the connecting pipe is communicated with the cavity through the interface.

In some possible embodiments, at least three of the connectors are disposed at the top end of each of the liquid-cooled single bodies, two of the connectors are respectively connected to two of the connecting pipes, and the connectors not connected to the connecting pipes are sealed by sealing members.

In some possible embodiments, the cell is a cylindrical cell.

In some possible embodiments, a plurality of cooling surfaces are arranged on the side surface of the liquid-cooled single body along the circumferential direction of the liquid-cooled single body.

In some possible embodiments, at least two liquid-cooled monomers surround to form a holding tank, and the holding tank is used for holding the battery core.

In some possible embodiments, the liquid cooling device further comprises a sealing element, four interfaces communicated with the cavity are formed at the top end of the liquid cooling single body, two of the interfaces are respectively connected with the two connecting pipes, and the other two interfaces are plugged through the sealing element.

In some possible embodiments, the plurality of liquid-cooled monomers are arranged along a first direction to form a monomer row, and two interfaces opposite to each other along the first direction of the liquid-cooled monomers located in the middle of the monomer row are respectively connected with two of the connecting pipes.

In some possible embodiments, the plurality of liquid-cooled monomers are arranged in a first direction to form a monomer row, the liquid-cooled monomers located at the end of the monomer row and connected to the adjacent monomer row, and two adjacent interfaces of the liquid-cooled monomers are respectively connected to two connecting pipes.

In some possible embodiments, the liquid-cooled monomer is made of metal.

In some possible embodiments, the liquid cooling device further comprises a bracket base, the bracket base is made of an insulating material, and the bottom of the liquid cooling unit is inserted into the bracket base.

In some possible embodiments, a glue layer is filled between the bottom of the liquid-cooled single body and the bracket base.

In some possible embodiments, the bracket base is provided with a glue inlet.

In some possible embodiments, the liquid-cooled single body is provided with a handle at the top.

In some possible embodiments, the connection tube is a hose.

On the other hand, a battery module is provided, which comprises a plurality of battery cores and the liquid cooling system, wherein the battery cores are in contact with the cooling surface.

The invention has the beneficial effects that:

according to the liquid cooling system and the battery module, the cooling surface is matched with the appearance of the battery core, so that the fitting tightness of the cooling surface and the battery core is improved, and the cooling effect is improved. The liquid cooling monomer is spliced through the connecting pipe and can be suitable for different battery modules, so that the applicability of a liquid cooling system is improved, and the bottom end of the liquid cooling monomer is fixedly connected with a tray and other structures in the battery module, so that the installation stability is improved. Avoid adopting the integral type liquid cooling board of traditional structure, correspond the die sinking to different battery module, this liquid cooling system reduce the cost. During the use, can batch production liquid cooling monomer and connecting pipe, splice the equipment according to the demand, shortened supply of goods cycle.

Drawings

Fig. 1 is a schematic structural diagram of a liquid cooling system according to an embodiment of the present invention;

FIG. 2 is a top view of a liquid cooling system according to an embodiment of the present invention;

FIG. 3 is an enlarged view at I of FIG. 2;

FIG. 4 is a cross-sectional view of a liquid-cooled monomer according to an embodiment of the present invention;

fig. 5 is an exploded view of a liquid-cooled cell, a stent base, a seal, and a connecting tube according to an embodiment of the present invention.

In the figure:

1. cooling the monomer in a liquid; 11. an interface; 12. cooling the dough; 13. a handle; 14. a cavity; 1A, accommodating grooves; 2. a connecting pipe; 3. a seal member; 4. a bracket base; 41. and a glue inlet.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, 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, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. 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 embodiment provides a battery module, including liquid cooling system and electric core, the liquid cooling system is used for cooling off electric core. The embodiment further provides a liquid cooling system, as shown in fig. 1-5, the liquid cooling system includes a plurality of liquid cooling units 1 and a plurality of connecting pipes 2, the liquid cooling units 1 are provided with cavities 14, the connecting pipes 2 are detachably connected to the liquid cooling units 1, the connecting pipes 2 are communicated with the cavities 14, two adjacent liquid cooling units 1 are connected in series through the connecting pipes 2, and the liquid cooling units 1 are provided with cooling surfaces 12 adapted to at least partial side shapes of the battery cells and used for cooling the sides of the battery cells.

The cooling surface 12 is matched with the shape of the battery core, so that the laminating tightness of the cooling surface 12 and the battery core is increased, and the cooling effect is improved. The liquid cooling monomer 1 is spliced through the connecting pipe 2, the liquid cooling monomer 1 is more flexible in arrangement and can be suitable for different battery modules, so that the applicability of a liquid cooling system is improved, and the bottom end of the liquid cooling monomer 1 is fixedly connected with a tray and other structures in the battery module, so that the installation stability is improved. For example, when the battery module includes different numbers of battery cells, the numbers of the liquid cooling units 1 and the connecting pipes 2 can be adjusted according to the number of the battery cells; when the battery core is arranged and changes in the battery module, the arrangement of the liquid cooling monomer 1 and the connecting pipe 2 can be adjusted according to the arrangement of the battery core, so that the battery module is suitable for different battery modules. Avoid adopting the integral type liquid cooling board of traditional structure, correspond the die sinking to different battery module, this liquid cooling system reduce the cost. During the use, can batch production liquid cooling monomer 1 and connecting pipe 2, splice the equipment according to the demand, shortened the supply of goods cycle. When the battery module is used for products such as new energy automobile, when leading to electric core quantity to change along with upgrading of new energy automobile etc. the liquid cooling system homoenergetic of above-mentioned concatenation formula is compatible.

In one embodiment, as shown in fig. 5, the cell is a cylindrical cell, and the cooling surface 12 is a circular arc surface.

In one embodiment, the top end of the liquid cooling unit 1 is provided with an interface 11 communicated with the cavity 14, and the connecting pipe 2 is communicated with the cavity 14 through the interface 11. The bottom of liquid cooling monomer 1 is used for bearing the weight of the structure connection such as tray with the battery module, and the side of liquid cooling monomer 1 is used for cooling off electric core, is connected with liquid cooling monomer 1's top through connecting pipe 2, can prevent that the structure from interfering, reduces occupation space.

In one embodiment, as shown in fig. 3 and 5, a plurality of cooling surfaces 12 are disposed on the side surfaces of the liquid cooling unit 1 along the circumferential direction of the liquid cooling unit 1, so that a plurality of battery cells can be cooled at the same time, and the cooling efficiency is improved.

In an embodiment, as shown in fig. 3, at least two liquid cooling monomers 1 surround to form a holding tank 1A, the holding tank 1A is used for holding an electric core, and the plurality of liquid cooling monomers 1 cool the electric core in the holding tank 1A at the same time, thereby improving the cooling effect. In an embodiment, as shown in fig. 3, the cross section of the liquid cooling single body 1 is roughly a quadrangle, four sides form a cooling surface 12 respectively, the four liquid cooling single bodies 1 are arranged in a matrix, one of the cooling surfaces 12 of each liquid cooling single body 1 is used for surrounding and forming a holding tank 1A, the holding tank 1A is used for holding an electric core, the four liquid cooling single bodies 1 are simultaneously used for cooling the electric core in the holding tank 1A, the cooling of the periphery of the electric core is uniform, and the cooling is sufficient. In other embodiments, two, three, five, six or more liquid-cooled monomers 1 may be provided to form the accommodating tank 1A, without limitation. In other embodiments, the liquid-cooled single body 1 may also have one, two, three or more cooling surfaces 12, without limitation.

In one embodiment, as shown in fig. 3, at least three interfaces 11 are provided at the top end of each liquid cooling single body 1, two of the interfaces 11 are respectively connected to two connecting pipes 2, and the interface 11 not connected to the connecting pipes 2 is blocked by a sealing member 3, and specifically, two of the interfaces 11 may be selected to be respectively connected to two connecting pipes 2 according to the arrangement of the space and the liquid cooling single body 1. In an embodiment, four interfaces 11 have been seted up on the top of liquid cooling monomer 1, wherein two interfaces 11 are connected with two connecting pipes 2 respectively, two other interfaces 11 pass through the shutoff of sealing member 3, can select two interfaces 11 to be connected with connecting pipe 2 according to the demand, in order to realize establishing ties with other liquid cooling monomers 1, specifically can be the position of selecting or two adjacent liquid cooling monomers 1 according to liquid cooling monomer 1's installation angle, if select two liquid cooling monomers 1 interface 11 that are closest to each other, thereby can be that connecting pipe 2's length is the shortest, save connecting pipe 2, and reduce connecting pipe 2 occupation space. Specifically, the four interfaces 11 are located at four corners of the quadrangle, respectively.

In one embodiment, as shown in fig. 2 and 3, the liquid cooling system includes M × N liquid-cooled cells 1, M liquid-cooled cells 1 arranged in a first direction to form a cell row, and N cell rows arranged in a second direction, the first direction being a vertical direction, and the second direction being a horizontal direction. As shown in fig. 3, two interfaces 11 of a liquid-cooled single unit 1 located in the middle of a single unit row, such as the liquid-cooled single unit 1 located in the middle row, opposite to each other in the first direction are respectively connected to two connecting pipes 2, so as to ensure that the connecting pipe 2 is shortest when two adjacent liquid-cooled single units 1 are connected; the liquid cooling monomer 1 that is located monomer row tip and is connected with adjacent monomer row, liquid cooling monomer 1 and the liquid cooling monomer 1 of the third column bottommost like the second row bottommost, its two adjacent interfaces 11 are connected with two connecting pipes 2 respectively, can guarantee that connecting pipe 2 size is the shortest.

Specifically, as shown in fig. 2 and 3, the liquid cooling unit 1 located at the lower left corner is used for being connected with water supply equipment such as an external water pump and a water tank through the connecting pipe 2, and the specific connecting pipe 2 may be installed on any one of the other three interfaces 11, and specifically, the selection is performed according to spatial layout and the like, without limitation.

In another embodiment, the liquid cooling system may be arranged in other shapes, which is not limited. In another embodiment, two interfaces 11 or three interfaces 11 may be provided, or more than four interfaces 11 may be provided, without limitation.

In an embodiment, the connecting pipe 2 is a flexible pipe, for example, a rubber flexible pipe, etc., and the flexible pipe can be stretched and compressed, so that the flexible pipe can deform during installation of the liquid cooling system, and the size of the connecting pipe 2 is too long or too short to affect the installation tolerance between the liquid cooling units 1, thereby facilitating installation. And when liquid cooling monomer 1 has dimensional tolerance, and lead to the distance between the liquid cooling monomer 1 to produce the deviation, can reduce the installation degree of difficulty through connecting pipe 2 absorption size deviation.

As shown in fig. 4 and 5, a circular tube is disposed on the top of the liquid cooling unit 1, the circular tube is communicated with the cavity 14, the circular tube forms the interface 11, and the connecting tube 2 is connected to the circular tube, so that the connecting tube 2 and the sealing member 3 can be respectively assembled with and disassembled from the circular tube.

Further, the sealing member 3 may be disposed outside the circular tube or plugged inside the circular tube.

In one embodiment, the liquid-cooled single body 1 is a metal column such as an aluminum column, and the aluminum column itself has a better thermal conductivity, thereby improving the cooling effect. In an embodiment, as shown in fig. 3 and 5, the liquid cooling system further includes a bracket base 4, the bracket base 4 is made of an insulating material, the bottom of the liquid cooling unit 1 is inserted into the bracket base 4, and when the liquid cooling unit 1 is installed in a metal structure such as an external tray, the bracket base 4 is arranged to prevent the liquid cooling unit 1 from contacting other structures, thereby avoiding the possibility of short circuit. In one embodiment, the support base 4 and the liquid cooling unit 1 are an integrated structure, and the support base 4 may be a plastic support, and the plastic support and the liquid cooling unit 1 are formed by injection molding. In an embodiment, the support base 4 is provided with a glue inlet 41, when glue needs to be applied, the glue inlet 41 enables glue to flow sufficiently, the glue is convenient to fill, a glue layer is filled between the bottom of the liquid cooling monomer 1 and the support base 4, and bonding is reliable.

In an embodiment, as shown in fig. 5, the top of the liquid cooling unit 1 is provided with a handle 13, the liquid cooling unit 1 is extracted through the handle 13, the operation is convenient, and the liquid cooling unit 1 is particularly suitable for automatic production, and the liquid cooling unit 1 is taken and placed through a mechanical arm and the like, and in this embodiment, the handle 13 is of a semi-annular structure. Handle 13 locates the top of liquid cooling monomer 1, avoids influencing the electric core of arranging all around of liquid cooling monomer 1, reduces liquid cooling monomer 1 and occupies installation space, improves the energy density of battery module.

It should be understood that the above-described embodiments of the present invention are merely 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. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and 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. The utility model provides a liquid cooling system, its characterized in that includes a plurality of liquid cooling monomers (1) and a plurality of connecting pipe (2), liquid cooling monomer (1) is equipped with cavity (14), connecting pipe (2) with liquid cooling monomer (1) can be dismantled and connect, just connecting pipe (2) with cavity (14) intercommunication, adjacent two liquid cooling monomer (1) passes through connecting pipe (2) are established ties, liquid cooling monomer (1) are equipped with cooling surface (12) with the at least partial side shape adaptation of electric core.

2. The liquid cooling system of claim 1, wherein an interface (11) communicated with the cavity (14) is formed at the top end of the liquid cooling single body (1), and the connecting pipe (2) is communicated with the cavity (14) through the interface (11).

3. The liquid cooling system of claim 2, wherein each liquid cooling unit (1) has at least three said interfaces (11) at the top, wherein two of said interfaces (11) are connected to two of said connecting pipes (2), and wherein said interfaces (11) not connected to said connecting pipes (2) are sealed by a sealing member (3).

4. The liquid cooling system of claim 1, wherein the cells are cylindrical cells.

5. The liquid cooling system according to claim 4, characterized in that a plurality of said cooling surfaces (12) are provided on the side of said liquid-cooled single body (1) along the circumferential direction of said liquid-cooled single body (1).

6. The liquid cooling system of claim 5, wherein at least two of the liquid-cooled units (1) are enclosed to form a receiving tank (1A), and the receiving tank (1A) is used for receiving the electric core.

7. The liquid cooling system of claim 6, further comprising a sealing member (3), wherein four ports (11) communicated with the cavity (14) are formed at the top end of the liquid cooling unit (1), two of the ports (11) are respectively connected to two of the connecting pipes (2), and the other two ports (11) are sealed by the sealing member (3).

8. The liquid cooling system of claim 7, wherein a plurality of said liquid-cooled single units (1) are arranged in a first direction to form a single unit row, and two said interfaces (11) opposite to each other along said first direction of said liquid-cooled single unit (1) located at the middle position of said single unit row are respectively connected to two said connecting pipes (2).

9. The liquid cooling system of claim 7, wherein a plurality of said liquid-cooled single units (1) are arranged along a first direction to form a single row, and two adjacent interfaces (11) of said liquid-cooled single units (1) located at the end of said single row and connected to the adjacent single row are respectively connected to two said connecting pipes (2).

10. A liquid cooling system according to any of claims 1-9, characterized in that the liquid cooling unit (1) is made of metal.

11. The liquid cooling system of claim 10, further comprising a bracket base (4), wherein the bracket base (4) is made of an insulating material, and the bottom of the liquid cooling unit (1) is inserted into the bracket base (4).

12. The liquid cooling system of claim 11, wherein a glue layer is filled between the bottom of the liquid cooling unit (1) and the bracket base (4).

13. The liquid cooling system of claim 11, wherein the holder base (4) is provided with a glue inlet (41).

14. A liquid cooling system according to any of claims 1-9, characterized in that the top of the liquid cooling cell (1) is provided with a handle (13).

15. A liquid cooling system according to any of claims 1-9, characterized in that the connection pipe (2) is a hose.

16. A battery module, characterized in that it comprises a plurality of electric cells in contact with said cooling surface (12) and a liquid cooling system according to any of claims 1 to 15.