CN221041261U

CN221041261U - Battery package liquid cooling board, battery package and vehicle

Info

Publication number: CN221041261U
Application number: CN202322548648.XU
Authority: CN
Inventors: 陈晓强; 徐超; 孙笑寒
Original assignee: Beijing CHJ Automobile Technology Co Ltd
Current assignee: Beijing CHJ Automobile Technology Co Ltd
Priority date: 2023-09-19
Filing date: 2023-09-19
Publication date: 2024-05-28
Anticipated expiration: 2033-09-19

Abstract

The disclosure provides a battery pack liquid cooling plate, a battery pack and a vehicle, wherein the battery pack liquid cooling plate comprises a heat exchange space surrounded by wall plates, a plurality of false flow channels and a plurality of true flow channels are arranged in the heat exchange space, the side walls of the false flow channels comprise at least one inclined rib, and blocking sheets are arranged at two ends of the false flow channels; the side wall of the true flow channel adopts straight ribs; the straight ribs refer to side walls which are arranged horizontally or vertically, and the inclined ribs refer to side walls which are not arranged horizontally or vertically. Through the battery package liquid cooling board that this disclosure provided, by the flexible inclined rib of false runner realizes the absorption to electric core inflation extrusion effort, and can not spill over the coolant liquid to the inflation kettle. The cooling liquid in the true flow channel is used for cooling/heating the battery cell through heat exchange, and when the straight ribs of the true flow channel are extruded, the stress direction of the straight ribs is along the vertical direction of the straight ribs, so that the cooling liquid is not easy to deform compared with the inclined ribs, and the cooling liquid is prevented from overflowing from the expansion kettle.

Description

Battery package liquid cooling board, battery package and vehicle

Technical Field

The disclosure relates to the technical field of thermal management of power batteries, in particular to a battery pack liquid cooling plate, a battery pack and a vehicle.

Background

The battery pack, as a core component of a new energy automobile, is visible as a spot in importance of safety problems. The safety of the battery pack is improved, and the temperature of the internal structure of the battery pack needs to be controlled, so that the heat dissipation performance of the whole structure of the battery pack is very important. The use of the liquid cooling plate has important application significance for maintaining the temperature of the battery cell and ensuring the safety of the battery cell.

In the power battery thermal management scheme, the large-area cooling of the battery cell can provide good thermal management performance, so that the cooling/heating strength of the battery cell is ensured. In the large-area cooling scheme of the battery cell, in order to realize the functions of cooling/heating the battery cell and absorbing the expansion of the battery cell, a harmonica-type liquid cooling plate is generally adopted in the liquid cooling plate in the related art.

As shown in fig. 1 and 2, a harmonica-type liquid cooling plate 101 in the related art includes a heat exchange space surrounded by a wall plate 102 and a plurality of diagonal ribs 103 provided in the heat exchange space. Wherein, a plurality of inclined ribs divide the heat exchange space into a plurality of cooling liquid flow channels 104, and the plurality of cooling liquid flow channels 104 are communicated with an external expansion kettle. When in use, the cooling/heating of the battery cell is realized through the flow of the cooling liquid in the cooling liquid flow channel 104; meanwhile, the absorption of the expansion acting force of the battery cell is realized through the stress deformation of the inclined ribs 103.

When the inclined ribs 103 are extruded by the expansion force of the battery cells, the cooling liquid in the cooling liquid flow passage 104 enters the expansion kettle due to the compression. When the coolant overflows excessively, an abnormal phenomenon that the coolant overflows the expansion kettle is caused. As shown in fig. 2, in order to reduce the risk of the coolant overflowing the expansion kettle, and ensure that the flow rate of the coolant and the cooling area of the liquid cooling plate are in a reasonable range, two ends of a part of the coolant flow channels 104 are provided with blocking pieces 107, and no coolant exists in the coolant flow channels 104 in the blocking pieces 107, so as to form a false flow channel 106; and the cooling liquid flow passage 104 without the blocking piece 107 at both ends is the true flow passage 105. Thereby reducing the overflow amount of the cooling liquid and further reducing the risk of the cooling liquid overflowing the expansion kettle.

However, in the related art, although the dummy flow path 106 is provided, the cooling liquid in the dummy flow path 105 still has a risk of being squeezed out of the expansion kettle by the expansion force of the battery cell.

Disclosure of Invention

The present disclosure provides a battery package liquid cooling plate and battery package.

According to a first aspect of the present disclosure, there is provided a battery pack liquid cooling plate, including a heat exchange space surrounded by a wall plate, wherein a plurality of false flow channels and a plurality of true flow channels are arranged in the heat exchange space, a side wall of the false flow channel includes at least one inclined rib, and blocking sheets are arranged at two ends of the false flow channel; the side wall of the true flow channel adopts straight ribs; the straight ribs refer to side walls which are arranged horizontally or vertically, and the inclined ribs refer to side walls which are not arranged horizontally or vertically.

In some embodiments, the true channel is adjacent to an upper or lower wall of the heat exchange space, and the true channel is no more than 1 millimeter from the upper or lower wall adjacent to the true channel.

In some embodiments, the number of the true flow channels on the left and right sides of the battery pack liquid cooling plate is the same, and the true flow channels on the left and right sides of the battery pack liquid cooling plate are distributed in a central symmetry manner with the center of the battery pack liquid cooling plate.

In some embodiments, the plurality of dummy flow channels are disposed adjacent to one another, and the plugs of the plurality of dummy flow channels are integral plugs.

In some embodiments, the thickness of the straight rib is not less than the thickness of the diagonal rib, and the thickness of the diagonal rib is 0.3mm to 1 mm.

In some embodiments, the sum of the cross-sectional areas of the plurality of true flow channels is 20% to 70% of the cross-sectional area of the heat exchange space.

In some embodiments, the horizontal ribs of the true or false flow channels adjacent to the heat exchange space are the upper or lower wall of the heat exchange space.

In some embodiments, the number of diagonal ribs and straight ribs connected to the upper and lower wall plates of the heat exchange space is equal, and the inclination angles of the diagonal ribs connected to the upper and lower wall plates of the heat exchange space are the same.

According to a second aspect of the present disclosure, there is provided a battery pack including the battery pack liquid cooling plate of the first aspect of the present disclosure.

According to a third aspect of the present disclosure, there is provided a vehicle including the battery pack of the second aspect of the present disclosure.

It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the application or to delineate the scope of the application. Other features of the present application will become apparent from the description that follows.

Drawings

The drawings are for a better understanding of the present solution and are not to be construed as limiting the present disclosure. Wherein:

fig. 1 is a schematic structural diagram of a battery pack liquid cooling plate according to a first related art provided in the present disclosure;

fig. 2 is a schematic structural diagram of a battery pack liquid cooling plate according to a second related art provided in the present disclosure;

Fig. 3 is a schematic structural diagram of a battery pack liquid cooling plate provided by the present disclosure;

fig. 4 is a schematic structural diagram of a battery pack liquid cooling plate with a blocking piece provided by the present disclosure.

Detailed Description

Exemplary embodiments of the present disclosure are described below in conjunction with the accompanying drawings, which include various details of the embodiments of the present disclosure to facilitate understanding, and should be considered as merely exemplary. Accordingly, one of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present disclosure. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

The battery pack liquid cooling plate, the battery pack, and the vehicle of the embodiments of the present disclosure are described below with reference to the drawings.

The present disclosure provides a battery pack liquid cooling plate, as shown in fig. 3 and 4. The battery package liquid cooling board 201 that this disclosure provided includes: the device comprises a heat exchange space surrounded by wall plates, wherein a plurality of false flow channels 202 and a plurality of true flow channels 203 are arranged in the heat exchange space, the side wall of the false flow channels 202 comprises at least one inclined rib 204, and blocking sheets 206 are arranged at two ends of the false flow channels 202; the side wall of the true flow channel 203 adopts straight ribs 205; the straight ribs 205 refer to horizontally or vertically disposed sidewalls, and the diagonal ribs 204 refer to non-horizontally or non-vertically disposed sidewalls.

In an embodiment, the number of the dummy flow paths 202 and the dummy flow paths 203 may be two, three, or more, which is not limited in the present disclosure.

In one embodiment, no coolant is present in the dummy flow path 202, and the dummy flow path 202 only absorbs the expansion force of the cell. Because the side wall of the false flow channel 202 includes at least one inclined rib 204, when the cell expands and the expansion force thereof presses the upper side and the lower side of the liquid cooling plate 201, compared with the straight rib 205, the inclined rib 204 has larger stress area and is easier to deform.

Preferably, in one embodiment, the dummy flow path 202 is a parallelogram surrounded by two straight ribs 205 and two diagonal ribs 204. The dummy flow path 202 having a parallelogram cross section has a stronger effect of absorbing an expansion force when receiving the expansion force when the cell expands, compared with the dummy flow path 202 including one inclined rib.

In an embodiment, since the side wall of the true channel 203 adopts the straight rib 205, when the cell expands and the expansion force thereof presses the upper and lower sides of the liquid cooling plate 201, the pressure applied to the straight rib 205 is along the vertical direction, and the stress area of the straight rib 205 is small and is not easy to deform. And the cooling liquid flows in the straight ribs 205, so that the cooling/heating of the battery cells is realized through the flowing of the cooling liquid.

In summary, the battery pack liquid cooling plate 201 provided by the present disclosure, through the design of the dummy flow channel 202 with the side wall adopting the inclined rib 204 and the real flow channel 203 with the side wall adopting the straight rib 205, the battery pack liquid cooling plate 201 provided by the present disclosure can realize cooling/heating of the battery core and absorb the expansion force of the battery core. And the true runner 203 is not easy to deform under the stress, so that the coolant is prevented from overflowing the expansion kettle.

In one embodiment, to improve the cooling/heating performance of the battery pack liquid cooling plate 201 on the battery cell, the vacuum channel 203 should be as close to the upper wall plate or/and the lower wall plate of the battery pack liquid cooling plate 201 as possible because the upper wall plate or/and the lower wall plate of the battery pack liquid cooling plate 201 contacts the battery cell.

Based on this, in an embodiment, the vacuum channel 203 is adjacent to the upper wall plate or the lower wall plate of the heat exchange space, and the distance between the vacuum channel 203 and the upper wall plate or the lower wall plate adjacent to the vacuum channel 203 is not more than 2 mm.

In order to save raw materials of the straight ribs 205 and reduce production cost, in an embodiment, the horizontal straight ribs 205 of the true runner 203 or the false runner 202 adjacent to the heat exchange space are an upper wall plate or a lower wall plate of the heat exchange space.

In one embodiment, in order to ensure the heat exchange performance of the battery pack liquid cooling plate 201, the thickness of the upper wall plate or the lower wall plate of the battery pack liquid cooling plate 201 is between 0.3 mm and 2mm, preferably between 0.4 mm and 1 mm.

In an embodiment, in order to improve uniformity of heat exchange performance of the upper and lower sides of the battery pack liquid cooling plate 201, and further ensure uniformity of cooling/heating of the battery cell by the battery pack liquid cooling plate 201, preferably, cross-sectional areas of true flow channels of the upper and lower sides of the battery pack liquid cooling plate 201 are the same.

Based on this, in an embodiment, the number of the true channels 203 on the upper and lower sides of the battery pack liquid cooling plate 201 is the same, and the true channels 203 on the upper and lower sides of the battery pack liquid cooling plate 201 are distributed in a central symmetry manner with respect to the center of the battery pack liquid cooling plate 201.

The true flow channels 203 on the upper and lower sides of the battery pack liquid cooling plate 201 are distributed in a central symmetry manner with the center of the battery pack liquid cooling plate 201, so that the cross-sectional areas of the true flow channels 203 on the upper and lower sides of the battery pack liquid cooling plate 201 at corresponding positions can be ensured to be the same. Further, the cross-sectional areas of the true channels 203 at the corresponding positions on the upper side and the lower side of the battery pack liquid cooling plate 201 are the same, and the number of the true channels 203 is the same, so that the cross-sectional areas of the true channels 203 on the upper side and the lower side of the battery pack liquid cooling plate 201 are ensured to be the same. Further, since the dummy flow paths 202 are located at other positions than the dummy flow paths 203 in the heat exchange space, when the cross sectional areas of the dummy flow paths 203 on the upper and lower sides of the pack liquid cooling plate 201 are the same, the cross sectional areas of the dummy flow paths 202 on the upper and lower sides of the pack liquid cooling plate 201 are also the same.

In an embodiment, the dividing line of the upper and lower sides of the heat exchange space may be a horizontal center line of the heat exchange space, and the horizontal center line may also be actually present, which is not limited in the present disclosure.

In an embodiment, the cross-sectional area of the dummy flow path 202 on the upper side of the heat exchange space refers to the sum of the cross-sectional areas of all the dummy flow paths 202 above the horizontal midline of the heat exchange space, the cross-sectional area of the dummy flow path 203 on the upper side of the heat exchange space refers to the sum of the cross-sectional areas of all the dummy flow paths 203 above the horizontal midline of the heat exchange space, the cross-sectional area of the dummy flow path 202 on the lower side of the heat exchange space refers to the sum of the cross-sectional areas of all the dummy flow paths 202 below the horizontal midline of the heat exchange space, and the cross-sectional area of the dummy flow path 203 on the lower side of the heat exchange space refers to the sum of the cross-sectional areas of all the dummy flow paths 203 below the horizontal midline of the heat exchange space.

In an embodiment, the plugs 206 are required to be disposed at two ends of the plurality of dummy flow channels 202, if the plurality of dummy flow channels 202 are not adjacent, then during production, the plugs 206 with different specifications are required to be correspondingly produced according to the shapes and sizes of the cross sections of the plurality of dummy flow channels 202, which will certainly increase the production cost and reduce the production efficiency.

Based on this, in an embodiment, the plurality of dummy flow channels 202 are disposed adjacent to each other, and the blocking pieces of the plurality of dummy flow channels 202 are integrated into the blocking piece 206.

By means of the integral blocking piece 206 of the plurality of false flow channels 202, the blocking piece 206 of the plurality of false flow channels 202 can be formed by stamping in sequence as a whole on a plate, so that the production cost of the blocking piece 206 is reduced, and the production efficiency of the blocking piece 206 is improved.

For example, the cross section of the blocking piece 206 is the same as the cross section of the battery pack liquid cooling plate 201, and then the flow passage opening corresponding to the true flow passage 203 is punched at the position of the blocking piece 206 corresponding to the true flow passage 203. The dimensional accuracy of the stamping forming process is ensured by the die, so that the processed parts have stable quality and good consistency, and have the characteristic of' identical die. The stamping forming process can also obtain parts which cannot be manufactured or are difficult to manufacture by other processing processes, such as thin wall, light weight, good rigidity, high surface quality and complex shape. The material utilization rate of the stamping forming process is high, and the stamping forming process belongs to small-chip-free processing. The stamping forming process has high efficiency and convenient operation, and has low requirements on the technical grade of workers.

In an embodiment, the blocking piece 206 may also be formed by casting, etc., which is not limited in this disclosure.

In one embodiment, to ensure the corrosion resistance and strength of the plug 206, the plug 206 is made of an aluminum alloy. In an embodiment, the plug 206 and the wall plate of the battery pack liquid cooling plate 201 may be made of other materials with good heat conductivity and strong corrosion resistance, such as copper.

In one embodiment, to further ensure that the diagonal ribs 204 are more deformable under compression than the straight ribs 205, the thickness of the straight ribs 205 is not less than the thickness of the diagonal ribs 204. Preferably, the thickness of the diagonal rib 204 is 0.3 mm to 1 mm, and the thickness of the straight rib 205 is 0.3 mm to 2mm.

In an embodiment, the thicknesses of the inclined rib 204 and the straight rib 205 may be set according to needs, for example, for a battery pack with higher power, the thicknesses of the inclined rib 204 and the straight rib 205 may be adjusted upwards, and 0.3 mm to 2 mm is the preferred thickness of the straight rib 205. In one embodiment, the thickness of the straight rib 205 is not limited.

In an embodiment, in order to ensure the consistency of the extrusion forces on the upper and lower sides of the liquid cooling plate 201 of the battery pack, the number of diagonal ribs 204 and straight ribs 205 connected to the upper and lower wall plates of the heat exchange space is equal.

In an embodiment, the number of diagonal ribs 204 connected to the upper wall plate of the heat exchange space refers to the sum of the number of diagonal ribs 204 connected to the upper wall plate of the heat exchange space, the number of straight ribs 205 connected to the upper wall plate of the heat exchange space refers to the sum of the number of straight ribs 205 connected to the upper wall plate of the heat exchange space, the number of diagonal ribs 204 connected to the lower wall plate of the heat exchange space refers to the sum of the number of diagonal ribs 204 connected to the lower wall plate of the heat exchange space, and the number of straight ribs 205 connected to the lower wall plate of the heat exchange space refers to the sum of the number of straight ribs 205 connected to the lower wall plate of the heat exchange space.

In an embodiment, in order to further ensure the stress balance of the diagonal ribs 204 (the dummy flow channels 202) on the upper and lower walls of the battery pack liquid cooling plate 201, the diagonal angles of the diagonal ribs connected to the upper and lower walls of the heat exchange space are the same.

In an embodiment, as shown in fig. 3, the inclined rib 204 is inclined to the right, and the angle of the inclined rib 204 inclined to the right is greater than one hundred twenty degrees, so as to ensure that the inclined rib 204 absorbs the expansion force of the battery cell to the greatest extent. For example, the angle of inclination of the diagonal rib 204 to the right is one hundred thirty-five degrees, which is not limited in the present disclosure.

In one embodiment, the cross-sectional area of the true flow channel 203 is 20% to 70% of the cross-sectional area of the heat exchange space. 20% to 70% of the range, not only can the heat exchange performance of the battery cell be ensured, but also the amount of the cooling liquid entering the expansion kettle from the real runner 203 can be ensured not to be excessive.

In an embodiment, if the power of the battery pack is high, that is, the expansion amount of the battery pack is high when the battery pack is subjected to charge-discharge cycles, in order to ensure the heat exchange performance of the battery cell, the cross-sectional area of the real flow channel 203 may be more than 50% of the cross-sectional area of the heat exchange space. If the power of the battery pack is small, the cross-sectional area of the true flow channel 203 may be 50% or less of the cross-sectional area of the heat exchange space.

In one embodiment, the heat exchange space is formed using an extrusion molding process. The extrusion molding process has the characteristic of continuous production, and can produce pipes, plates, bars, profiles, films, cables, monofilaments and the like with any length according to the needs.

In an embodiment, the heat exchange space may also be formed by casting, etc., which is not limited in this disclosure.

The embodiment of the disclosure also provides a battery pack, which comprises the battery pack liquid cooling plate 201.

The embodiment of the disclosure also provides a vehicle, which comprises the battery pack disclosed by the embodiment of the disclosure.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims

1. The utility model provides a battery package liquid cooling board, includes by wallboard enclose synthetic heat exchange space, its characterized in that: a plurality of false flow channels and a plurality of true flow channels are arranged in the heat exchange space, the side wall of each false flow channel comprises at least one inclined rib, and blocking sheets are arranged at two ends of each false flow channel; the side wall of the true flow channel adopts straight ribs; the straight ribs refer to side walls which are arranged horizontally or vertically, and the inclined ribs refer to side walls which are not arranged horizontally or vertically.

2. The battery pack liquid cooling plate of claim 1 wherein: the vacuum flow channel is adjacent to the upper wall plate or the lower wall plate of the heat exchange space, and the distance between the vacuum flow channel and the upper wall plate or the lower wall plate adjacent to the vacuum flow channel is not more than 2 mm.

3. The battery pack liquid cooling plate of claim 2 wherein: the number of the true flow channels on the upper side and the lower side of the battery pack liquid cooling plate is the same, and the true flow channels on the upper side and the lower side of the battery pack liquid cooling plate are distributed in a central symmetry mode with the center of the battery pack liquid cooling plate.

4. A battery pack liquid cooling plate according to any one of claims 1 to 3, wherein: the plurality of false flow channels are adjacently arranged, and the blocking pieces of the plurality of false flow channels are integrated.

5. A battery pack liquid cooling plate according to any one of claims 1 to 3, wherein: the thickness of the straight rib is not smaller than that of the inclined rib, and the thickness of the inclined rib is 0.3-1 mm.

6. A battery pack liquid cooling plate according to any one of claims 1 to 3, wherein: the sum of the cross-sectional areas of the plurality of true flow channels is 20% to 70% of the cross-sectional area of the heat exchange space.

7. The battery pack liquid cooling plate of claim 1 wherein: and the horizontal ribs of the true runner or the false runner adjacent to the heat exchange space adopt an upper wall plate or a lower wall plate of the heat exchange space.

8. The battery pack liquid cooling plate of claim 7 wherein: the quantity of the inclined ribs and the straight ribs connected with the upper wall plate and the lower wall plate of the heat exchange space is equal, and the inclination angles of the inclined ribs connected with the upper wall plate and the lower wall plate of the heat exchange space are the same.

9. A battery pack, characterized in that: a battery pack liquid cooling plate comprising any one of claims 1 to 8.

10. A vehicle, characterized in that: a battery pack comprising the battery pack of claim 9.