CN218996859U - Liquid cooling battery assembly, power battery and electric vehicle - Google Patents

Abstract

The utility model belongs to the technical field of battery cooling, and particularly provides a liquid cooling battery assembly, a power battery and an electric vehicle. The cooling device aims to solve the problems that the cooling effect is poor or the energy density is insufficient due to poor structural design of the cooling device of the existing power battery. Therefore, the liquid cooling battery assembly comprises the liquid cooling plate, the heat conduction pipe group, the liquid supply pipeline, the battery cell and the pole piece, at least one part of the liquid cooling plate is arranged on the first end face of the battery cell, the heat conduction pipe group is arranged on the second end face of the battery cell, the first end face and the second end face are opposite two end faces, the pole piece is connected with the battery cell and is positioned between the first end face and the second end face, the liquid cooling plate is provided with the cooling channel, and the liquid supply pipeline is communicated with the cooling channel to supply cooling liquid, so that the liquid cooling plate can realize better cooling effect through the cooling liquid, further, the cooling requirement of the power battery under the fast charging working condition can be effectively ensured, the light design can be effectively realized, and the energy density of the power battery is improved.

Description

Liquid cooling battery assembly, power battery and electric vehicle

Technical Field

The utility model belongs to the technical field of battery cooling, and particularly provides a liquid cooling battery assembly, a power battery and an electric vehicle.

Background

With the increasing popularity of electric vehicles, users have also placed higher demands on the overall performance of the electric vehicle, and power batteries are one of the most interesting elements for users as a core element for powering the electric vehicle, how the performance of the power batteries plays a critical role in the overall performance of the electric vehicle. Particularly, in the process of inputting and outputting electric quantity with high power, the battery of the electric vehicle can have high current continuously passing through the interior of the battery, so that a large amount of heat is generated in the battery, if the battery cannot be timely cooled, the use safety of the battery is easily affected, and even the battery is directly damaged, so that the thermal management of the battery is always paid attention to by those skilled in the art.

Specifically, the power batteries of existing electric vehicles are all provided with cooling devices to reduce the temperature of the batteries in time, and among many cooling methods, liquid cooling plates provided based on the liquid cooling principle are most widely used because of various advantages such as simple structure, high reliability, good cooling effect, and the like. The existing mode for realizing cooling by using a liquid cooling plate mainly comprises two modes: 1. the liquid cooling plates are arranged at the top and the bottom of the battery core, and the arrangement mode can ensure good cooling effect, but can greatly increase the weight of the battery, so that the battery pack is not in accordance with the requirement of light weight design, and the problem of obviously reducing the energy density of the battery pack is caused; 2. based on this, the existing partial batteries are provided with a liquid cooling plate only at the bottom of the battery cell, and the arrangement mode can effectively improve the energy density of the battery pack, but the cooling effect of the battery pack is also obviously reduced.

Accordingly, there is a need in the art for a new liquid cooled battery assembly, power battery and electric vehicle that addresses the above-described problems.

Disclosure of Invention

The utility model aims to solve the technical problems, namely, the problems that the cooling effect is poor or the energy density is insufficient due to the fact that the structural design of the cooling device of the existing power battery is poor.

In a first aspect, the utility model provides a liquid-cooled battery assembly comprising a liquid-cooled plate, a heat-conducting tube bank, a liquid supply pipeline, an electric core and a pole piece,

at least one part of the liquid cooling plate is arranged on a first end face of the battery cell, the heat conducting tube group is arranged on a second end face of the battery cell, the first end face and the second end face are opposite two end faces, the pole piece is connected with the battery cell and is positioned between the first end face and the second end face,

the liquid cooling plate is provided with a cooling channel, and the liquid supply pipeline is communicated with the cooling channel to supply cooling liquid.

In the above preferred embodiment of the liquid-cooled battery assembly, a part of the heat conduction pipe group is disposed near the pole piece.

In the above preferred technical solution of the liquid-cooled battery assembly, a part of the heat conduction tube group is disposed at a middle position of the electric core.

In the preferred technical solution of the above liquid-cooled battery assembly, the heat-conducting tube group includes at least one heat-conducting tube, and the shape of the heat-conducting tube is annular.

In the preferred technical scheme of the liquid-cooled battery assembly, the number of the heat conducting pipes is two, and the two heat conducting pipes are arranged in parallel.

In the above preferred technical solution of the liquid-cooled battery assembly, the outer edge shapes of the two heat conduction pipes are matched with the edge shape of the second end face of the electric core.

In the preferable technical scheme of the liquid-cooled battery assembly, a part of the liquid-cooled plate extends to the outside of the battery cell,

the liquid inlet and the liquid outlet of the liquid cooling plate are both arranged on the liquid cooling plate extending to the outside of the battery cell.

In the above preferred technical solution of the liquid-cooled battery assembly, the number of the electric cores is two, and the two electric cores are arranged on the liquid-cooled plate side by side.

In a second aspect, the present utility model provides a power battery comprising a liquid cooled battery assembly as described in any one of the preferred embodiments above.

In a third aspect, the present utility model provides an electric vehicle comprising the power cell described in the above preferred embodiment.

Under the condition that the technical scheme is adopted, the liquid cooling battery assembly comprises a liquid cooling plate, a heat conduction pipe group, a liquid supply pipeline, an electric core and a pole piece, at least one part of the liquid cooling plate is arranged on a first end face of the electric core and used for cooling the electric core from the first end face of the electric core, the heat conduction pipe group is arranged on a second end face of the electric core and used for cooling the electric core from the second end face of the electric core, the first end face and the second end face are opposite, so that the electric core can be comprehensively cooled, the pole piece is connected with the electric core and located between the first end face and the second end face, a cooling channel is arranged on the liquid cooling plate, and the liquid supply pipeline is communicated with the cooling channel and used for supplying cooling liquid so as to realize a better cooling effect through the cooling liquid. Based on the above, the liquid cooling plate which is communicated with the liquid supply pipeline to enable the cooling liquid to circulate is arranged to realize the main cooling effect, and then the auxiliary cooling is carried out by combining the arrangement of the heat conduction pipe group, so that the combination arrangement of the liquid cooling plate and the heat conduction pipe group not only can effectively ensure the good cooling effect, but also can effectively ensure the cooling requirement of the power battery under the fast charging working condition, and can effectively reduce the weight occupied by the cooling element, thereby better realizing the light-weight design, ensuring the cooling effect of the battery, and simultaneously effectively improving the energy density of the power battery.

Drawings

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings, in which:

FIG. 1 is a schematic view of the overall structure of a liquid-cooled battery assembly of the present utility model;

11. a liquid cooling plate; 111. a body portion; 112. an extension; 1121. a liquid inlet; 1122. a liquid outlet; 113. a cooling channel;

12. a heat conduction pipe group; 121. a first heat conduction pipe; 122. a second heat conduction pipe;

13. a battery cell;

14. pole pieces.

Detailed Description

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model. Those skilled in the art can adapt it as desired to suit a particular application. For example, the electric vehicle of the present utility model may be a pure electric vehicle or a hybrid electric vehicle; the vehicle can be a car or a business car. Such changes as to the specific type of vehicle do not depart from the basic principles of the utility model and are intended to be within the scope of the utility model.

It should be noted that, in the description of the present utility model, terms such as "middle," "top," "bottom," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

Referring to fig. 1, as shown in fig. 1, the liquid-cooled battery assembly of the present utility model includes a liquid-cooled plate 11, a heat-conducting tube group 12, a liquid-supply pipeline (not shown in the figure), a battery cell 13 and a pole piece 14, at least a portion of the liquid-cooled plate 11 is disposed on a first end face of the battery cell 13 for cooling the battery cell 13 from the first end face of the battery cell 13, the heat-conducting tube group 12 is disposed on a second end face of the battery cell 13 for cooling the battery cell 13 from the second end face of the battery cell 13 through the heat-conducting effect of the heat-conducting tube group 12, the first end face and the second end face are opposite to each other, so that the battery cell 13 can be cooled comprehensively, the pole piece 14 is connected with the battery cell 13 and is located between the first end face and the second end face, a cooling channel 113 is disposed on the liquid-cooled plate 11, and the liquid-supply pipeline is connected with the cooling channel 113 for supplying a cooling liquid so that the liquid-cooled plate 11 can realize a better cooling effect through the cooling liquid. The present utility model is not limited to the specific structure of the liquid supply line and the specific type of the cooling liquid flowing therein, as long as the liquid supply line can supply the cooling liquid to the liquid cooling plate 11.

Based on the arrangement mode, the liquid cooling battery assembly realizes the main cooling effect by arranging the liquid cooling plate 11 which is communicated with the liquid supply pipeline to circulate cooling liquid, and then combines the arrangement of the heat conduction pipe group 12 to perform auxiliary cooling through the heat conduction effect of the liquid cooling plate 11 and the heat conduction pipe group 12, so that the combination arrangement of the liquid cooling plate 11 and the heat conduction pipe group 12 not only can effectively ensure good cooling effect, but also can effectively ensure the cooling requirement of the power battery under the quick-charging working condition, and can also effectively reduce the whole weight occupied by the cooling element, thereby better realizing light-weight design, ensuring the cooling effect of the battery, and simultaneously effectively improving the energy density of the power battery.

Specifically, in this embodiment, the number of the electric cores 13 is two, the two electric cores 13 are arranged on the liquid cooling plate 11 side by side, a certain gap is provided between the two electric cores 13 to facilitate heat dissipation, and the specific size of the gap can be set according to the actual requirement, however, the number of the electric cores 13 is not limited, and a person skilled in the art can set according to the actual requirement, for example, the number of the electric cores 13 can be one or more. The battery cells 13 are flat cuboid as a whole, and two side surfaces (top surface and bottom surface in fig. 1) with the largest area of the battery cells 13 are the first end surface and the second end surface, and referring to the orientation shown in fig. 1, two corresponding pole pieces 14 of each battery cell 13 are rectangular and are respectively arranged on the outer side surface and the inner side surface of the battery cell 13. It should be noted that the specific type and shape of the battery cell 13 and the pole piece 14 and the connection relation are not limited in the utility model, and the present utility model can be set by a person skilled in the art according to the actual use requirement.

With continued reference to fig. 1, further, the liquid cooling plate 11 includes a body portion 111 and an extension portion 112 that are integrally disposed, and of course, the body portion 111 and the extension portion 112 may be separately disposed and then integrally connected by a connecting member. Specifically, the body portion 111 has a rectangular parallelepiped plate-like structure, and the shape of the body portion 111 matches the shape of the first end faces (i.e., the bottom faces in fig. 1) of the two cells 13 so that both the cells 13 can be connected to the body portion 111 through the first end faces, so that the body portion 111 can simultaneously perform cooling treatment on both the cells 13 from the bottom; of course, the present utility model does not limit the specific shape of the body 111, as long as the first end surfaces of the two cells 13 can be connected to the body 111. The utility model also does not limit the specific connection mode of the body 111 and the battery cell 13, preferably adopts a bonding mode, and preferably bonds through heat conduction structural adhesive, so as to better realize heat conduction and further better ensure the cooling effect. In addition, the body 111 is further provided with cooling channels 113, and the cooling channels 113 are uniformly distributed over the whole body 111, so as to achieve a better cooling effect. It should be noted that, the specific distribution manner of the cooling channels 113 on the main body 111 is not limited in the present utility model, and those skilled in the art can set the cooling channels according to the actual use requirements. In addition, the extension portion 112 is also a rectangular plate structure, the length and width of the extension portion 112 are respectively smaller than the length and width of the main body portion 111, the extension portion 112 is also provided with cooling channels 113, the cooling channels 113 are uniformly distributed on the whole extension portion 112, the cooling channels 113 arranged on the extension portion 112 are communicated with the cooling channels 113 arranged on the main body portion 111, and the liquid inlet 1121 and the liquid outlet 1122 of the liquid cooling plate 11 are arranged on the extension portion 112. It should be further noted that, the specific shape of the extension portion 112, the specific distribution manner of the cooling channels 113 on the extension portion 112, and the specific arrangement positions of the liquid inlet 1121 and the liquid outlet 1122 are not limited in the present utility model, and may be set by those skilled in the art according to actual use requirements.

Further, in the present embodiment, the heat conductive pipe group 12 includes a first heat conductive pipe 121 and a second heat conductive pipe 122, and a group of heat conductive pipe groups 12 is disposed on each cell 13, that is, the first heat conductive pipe 121 and the second heat conductive pipe 122 are disposed on each cell 13. Referring to the orientation in fig. 1, the first heat pipe 121 and the second heat pipe 122 are arranged in parallel, the first heat pipe 121 is arranged at the left side part of the battery core 13, the second heat pipe 122 is arranged at the right side part of the battery core 13, and the longitudinal sections of the first heat pipe 121 and the second heat pipe 122 are rectangular structures, so that three sides of the first heat pipe 121 and the second heat pipe 122 are positioned at the edge of the battery core 13, namely, the shape of the integral external edge formed by the first heat pipe 121 and the second heat pipe 122 is matched with the shape of the external edge of the battery core 13, thereby ensuring better cooling effect; of course, the specific shapes of the first heat conductive pipe 121 and the second heat conductive pipe 122 are not limited, and those skilled in the art can set the specific shapes according to practical requirements, for example, the specific shapes may also be elliptical, and preferably be a closed ring shape, so as to achieve better heat conductive cooling effect.

With continued reference to fig. 1, two short sides of the first heat-conducting tube 121 and the second heat-conducting tube 122 are both disposed near the pole piece 14, and two long sides of the first heat-conducting tube 121 and the second heat-conducting tube 122 both span the second end face of the whole battery core 13 along the length direction, so that the middle part of the long side can be disposed at the middle position of the battery core 13, and because the pole piece 14 is usually the part with the largest heat productivity of the battery, the utility model can quickly conduct the heat near the pole piece 14 to the middle low heat-generating area of the battery core 13 by disposing a part of the first heat-conducting tube 121 and the second heat-conducting tube 122 near the pole piece 14, so that accurate high-temperature inhibition can be realized by using smaller weight and space occupation ratio, and meanwhile, the temperature difference of the battery is effectively controlled. In addition, the first and second heat conductive pipes 121 and 122 may be solid pipes or hollow pipes, which are not limited thereto, and preferably flat solid pipes in order to maximize the cooling effect. In addition, it should be noted that, the specific shape and arrangement of the first heat conductive pipe 121 and the second heat conductive pipe 122 are not limited in the present utility model, and those skilled in the art can set the heat conductive pipes according to the actual use requirements; for example, the first heat conductive pipe 121 and the second heat conductive pipe 122 may also form a ring structure in a back and forth curved manner.

It should be noted that the above arrangement is only a preferred arrangement for better enhancing the cooling effect, and a person skilled in the art can set the specific arrangement of the heat-conducting tube group 12 according to the actual use requirement, so long as the heat-conducting tube group 12 is disposed on the second end surface of the electric core 13 to achieve auxiliary cooling. In addition, it should be noted that the specific connection mode of the heat conduction pipe group 12 and the battery cell 13 is not limited in the present utility model, and preferably, an adhesive mode is adopted, and adhesion is preferably performed through a heat conduction structural adhesive, so that heat conduction is better realized, and further, a cooling effect is better ensured.

In addition, the utility model also claims a power battery comprising the liquid-cooled battery assembly of any one of the embodiments above; of course, the utility model does not limit other structures of the power battery, and the power battery can be set by a person skilled in the art according to actual use requirements.

Furthermore, the utility model also claims an electric vehicle comprising the power battery described in the above embodiments; of course, the utility model does not limit other parts of the electric vehicle, and the electric vehicle can be set by a person skilled in the art according to actual use requirements.

Thus far, the technical solution of the present utility model has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present utility model is not limited to only these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present utility model, and such modifications and substitutions will fall within the scope of the present utility model.

Claims (10)

1. A liquid cooling battery assembly is characterized in that the liquid cooling battery assembly comprises a liquid cooling plate, a heat conduction pipe group, a liquid supply pipeline, an electric core and a pole piece,

at least one part of the liquid cooling plate is arranged on a first end face of the battery cell, the heat conducting tube group is arranged on a second end face of the battery cell, the first end face and the second end face are opposite two end faces, the pole piece is connected with the battery cell and is positioned between the first end face and the second end face,

the liquid cooling plate is provided with a cooling channel, and the liquid supply pipeline is communicated with the cooling channel to supply cooling liquid.

2. The liquid cooled battery assembly of claim 1, wherein a portion of the heat pipe stack is disposed adjacent the pole piece.

3. The liquid cooled battery assembly of claim 2, wherein a portion of the heat pipe stack is disposed in a central location of the battery cell.

4. The liquid cooled battery assembly of claim 3, wherein the heat pipe assembly comprises at least one heat pipe, the heat pipe having a ring shape.

5. The liquid-cooled battery assembly of claim 4, wherein the number of heat conducting tubes is two, and the two heat conducting tubes are arranged in parallel.

6. The liquid cooled battery assembly of claim 5, wherein the outer edge shape of the two heat pipes matches the edge shape of the second end face of the cell.

7. The liquid cooled battery assembly of any of claims 1-6 wherein a portion of the liquid cooled plate extends outside of the cell,

the liquid inlet and the liquid outlet of the liquid cooling plate are both arranged on the liquid cooling plate extending to the outside of the battery cell.

8. The liquid cooled battery assembly of any of claims 1-6, wherein the number of cells is two, two of the cells being disposed side-by-side on the liquid cooled plate.

9. A power cell comprising the liquid cooled battery assembly of any one of claims 1 to 8.

10. An electric vehicle characterized in that it comprises the power battery as claimed in claim 9.

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