CN218498198U

CN218498198U - Liquid cooling assembly and battery pack

Info

Publication number: CN218498198U
Application number: CN202222570724.2U
Authority: CN
Inventors: 杨邦亮
Original assignee: Sunwoda Electric Vehicle Battery Co Ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2023-02-17
Anticipated expiration: 2032-09-27

Abstract

The application provides liquid cooling subassembly and battery package, wherein the liquid cooling subassembly includes the liquid cooling board, and the liquid cooling board includes first plate body: a first plate body; the second plate body is opposite to the first plate body and is arranged at intervals to form a cooling liquid flow channel between the second plate body and the first plate body, the cooling liquid flow channel comprises two contact sections and a heat exchange section which is in fluid communication with the two contact sections, and the average cross-sectional area of the heat exchange section is smaller than that of the contact sections. This application is through setting up an at least liquid cooling board in the liquid cooling subassembly, the liquid cooling board has the coolant liquid runner that is formed by the relative first plate body that sets up and second plate body, the maximum cross sectional area through setting up the heat transfer section is less than the minimum cross sectional area of first contact segment, and the maximum cross sectional area of heat transfer section is less than the minimum cross sectional area of second contact segment, thereby can accelerate the velocity of flow when the heat transfer section of coolant liquid through coolant liquid runner, compare in first contact segment and second contact segment, the coolant liquid can take away the heat of heat transfer section more fast.

Description

Liquid cooling subassembly and battery package

Technical Field

The application relates to the technical field of energy storage devices, in particular to a liquid cooling assembly and a battery pack.

Background

When the battery core of a secondary battery, especially a battery pack composed of lithium ion batteries, is subjected to thermal management, the temperature of the battery core needs to be controlled within a normal use temperature range, and the performance and the service life of the battery can be directly influenced due to poor thermal management.

The battery package can produce certain heat at the charge-discharge in-process to along with the increase of charge-discharge current, generate heat and can present the trend of growth, be subject to electric core heat dissipation problem, for example, because the influence of structure difference, the single scheduling factor of cooling structure design around the electric core, the battery contains and easily causes middle temperature height, the problem that both ends temperature is low, the too big thermal management that is unfavorable for the battery package of battery package difference in temperature.

Under the condition that the heat management effect of the battery pack is poor, the problem of internal temperature unevenness easily caused by poor heat management in the battery pack can cause the problems of inconsistent internal resistance and increased pressure difference of the battery cell along with the increase of the charging and discharging cycle times, and the integral charging and discharging capacity of the battery pack is reduced.

SUMMERY OF THE UTILITY MODEL

The application provides a liquid cooling board and battery package to solve the bad problem of battery package thermal management.

In one aspect, the application provides a liquid cooling subassembly, including the liquid cooling board, the liquid cooling board includes:

a first plate body;

the second plate body is opposite to the first plate body and is arranged at intervals to form a cooling liquid flow channel between the second plate body and the first plate body, the cooling liquid flow channel comprises a heat exchange section, a first contact section and a second contact section, the first contact section and the second contact section are both in fluid communication with the heat exchange section, the maximum cross-sectional area of the heat exchange section is smaller than the minimum cross-sectional area of the first contact section, and the maximum cross-sectional area of the heat exchange section is smaller than the minimum cross-sectional area of the second contact section.

In a possible implementation manner of the present application, the liquid cooling plate includes a length direction, a width direction and a thickness direction, the length direction, the width direction, two liang of mutually perpendicular between the thickness direction, the heat exchange section is in the maximum linear dimension in the width direction is greater than the first contact section is in the minimum linear dimension in the width direction, the heat exchange section is in the maximum linear dimension in the width direction is less than the second contact section is in the minimum linear dimension in the width direction.

In one possible implementation manner of the present application, along the length direction, the linear size of the first board body and the linear size of the second board body in the width direction are increased and then decreased.

In one possible implementation manner of the present application, along the length direction, the linear dimension of the coolant flow channel in the thickness direction is first reduced and then increased.

In this application a possible implementation, first plate body with the second plate body all includes the side, the side is followed length direction extends, the side is the arc side.

In one possible implementation manner of the present application, the first plate body includes a recessed portion, the recessed portion faces the second plate body, and/or the second plate body includes a recessed portion, the recessed portion faces the first plate body.

In a possible implementation manner of the present application, a thickness of the first plate corresponding to the heat exchanging section is greater than a thickness of the first plate corresponding to the contact section, and/or a thickness of the second plate corresponding to the heat exchanging section is greater than a thickness of the second plate corresponding to the contact section.

In a possible implementation manner of the present application, the first plate body further includes a first outer side surface facing away from the second plate body, the first outer side surface is a plane, the second plate body includes a recessed portion, and the recessed portion faces the first plate body.

In one possible implementation manner of the present application, the first plate body and/or the second plate body is provided with a heat dissipation portion.

In a possible implementation manner of the present application, the first plate body includes an orientation of a first inner side surface of the second plate body, the second plate body includes an orientation of a second inner side surface of the first plate body, and the heat dissipation portion is disposed on the first inner side surface and/or the second inner side surface.

In one possible implementation manner of the present application, the heat dissipation portion has a sawtooth structure or a wave structure.

In one possible implementation manner of the present application, the number of the liquid cooling plates is multiple, the adjacent liquid cooling plates are arranged at intervals, the liquid cooling assembly further includes a first liquid collecting pipe and a second liquid collecting pipe, the first liquid collecting pipe and the second liquid collecting pipe are respectively connected to two ends of the liquid cooling plates, which are far away from the heat exchange section, and the first liquid collecting pipe and the second liquid collecting pipe are both communicated with the cooling liquid flow channel;

the first liquid collecting pipe is provided with at least one water inlet, and the second liquid collecting pipe is provided with at least one water outlet.

On the other hand, this application still provides a battery package, includes the liquid cooling subassembly.

The application provides a pair of liquid cooling subassembly and battery package, through set up the liquid cooling board in the liquid cooling subassembly, the liquid cooling board includes the coolant liquid runner that is formed by the relative first plate body that sets up and second plate body, the maximum cross sectional area through setting up the heat transfer section is less than the minimum cross sectional area of first contact segment, and the maximum cross sectional area of heat transfer section is less than the minimum cross sectional area of second contact segment, thereby can accelerate the velocity of flow when the heat transfer section of coolant liquid through the coolant liquid runner, compare in first contact segment and second contact segment, the coolant liquid can take away the heat of heat transfer section faster, thereby be favorable to improving the radiating rate of heat transfer section.

Drawings

The technical solutions and other advantages of the present application will become apparent from the following detailed description of specific embodiments of the present application when taken in conjunction with the accompanying drawings.

Fig. 1 is a schematic perspective view of a liquid cooling plate assembly according to an embodiment of the present application.

FIG. 2 isbase:Sub>A schematic cross-sectional view taken along line A-A' of FIG. 1 according to an embodiment of the present application.

FIG. 3 is a schematic cross-sectional view of another embodiment of a liquid cooled plate assembly of the present application.

FIG. 4 is a schematic cross-sectional view of another embodiment of a liquid cooled plate assembly of the present application.

FIG. 5 is a schematic cross-sectional view of another embodiment of a liquid cooled plate assembly of the present application.

Fig. 6 is a schematic top view of a liquid cooling plate assembly according to an embodiment of the present disclosure.

FIG. 7 is a schematic cross-sectional view taken along line B-B' of FIG. 6 according to an embodiment of the present application.

Fig. 8 is an exploded view of a liquid cooling panel according to an embodiment of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the features of the terms "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. It should be noted that unless otherwise explicitly stated or limited, the terms "connected" and "connected" are to be construed broadly and can include, for example, direct connection, indirect connection through an intermediary, communication between two elements, or interaction between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

The following disclosure provides many different embodiments or examples for implementing different features of the application. To simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.

The embodiment of the application provides a liquid cooling assembly and a battery pack, which are respectively described in detail below.

Referring to fig. 1 to 8, an embodiment of the present invention first provides a liquid cooling assembly, which includes at least one liquid cooling plate 10, wherein each liquid cooling plate 10 includes a first plate 11, and a cooling liquid channel 13.

Specifically, as shown in fig. 1 and fig. 2, in the liquid cooling plate 10 according to the embodiment of the present application, the second plate 12 is opposite to the first plate 11 and is disposed at an interval to form a cooling liquid channel 13 therebetween, wherein the cooling liquid channel 13 is used for flowing a cooling liquid therethrough, so as to take away heat on the single battery and cool the single battery. In the embodiment of the present application, the cooling liquid may be water, a refrigerant, or the like.

The coolant flow channel 13 includes a heat exchange section 131, a first contact section 132, and a second contact section 133, both the first contact section 132 and the second contact section 133 are in fluid communication with the heat exchange section 131, wherein the first contact section 132 and the second contact section 133 are respectively connected to two ends of the heat exchange section 131, and the coolant sequentially flows along the first contact section 132, the heat exchange section 131, and the second contact section 133 in the coolant flow channel 13. Wherein the maximum cross-sectional area of the heat exchange section 131 is smaller than the minimum cross-sectional area of the first contact section 132, and the maximum cross-sectional area of the heat exchange section 131 is smaller than the minimum cross-sectional area of the second contact section 133, so that the flow rate can be increased when the coolant passes through the heat exchange section 131 of the coolant channel 13, and compared with the first contact section 132 and the second contact section 133, the coolant can take away the heat of the heat exchange section 131 more quickly, thereby being beneficial to improving the heat dissipation speed of the heat exchange section 131.

It should be noted that the cross-sectional area of the embodiment of the present application refers to the cross-sectional area of the cooling liquid perpendicular to the flow direction thereof. In the embodiment of the present application, in the direction of the flowing of the cooling liquid, the cross-sectional areas at any two points intercepted by the heat exchange section 131 may be equal or unequal, correspondingly, the cross-sectional areas at any two points intercepted by the first contact section 132 may be equal or unequal, and the cross-sectional areas at any two points intercepted by the second contact section 133 may be equal or unequal.

When the liquid cooling assembly of the embodiment of the present application is applied to a battery pack, the single battery in the battery pack can be placed on the liquid cooling plate 10. Exemplarily, the unit cells may be placed at the first plate body 11 corresponding to the first contact section 132, the second contact section 133, and the heat exchange section 131.

The liquid cooling subassembly of the embodiment of the application is through setting up liquid cooling board 10, liquid cooling board 10 includes the coolant liquid runner 13 that is formed by relative first plate 11 and the second plate 12 that sets up, the maximum cross-sectional area through setting up heat transfer section 131 is less than the minimum cross-sectional area of first contact segment 132, and the maximum cross-sectional area of heat transfer section 131 is less than the minimum cross-sectional area of second contact segment 133, thereby can accelerate the velocity of flow when coolant liquid passes through coolant liquid runner 13 heat transfer section 131, compare in first contact segment 132 and second contact segment 133, the coolant liquid can take away the heat of heat transfer section 131 more fast, thereby be favorable to improving the radiating rate of heat transfer section 131, and then be favorable to improving the holistic temperature homogeneity of battery package.

In some embodiments, the liquid cooling plate 10 includes a length direction 101, a width direction 102 and a thickness direction 103, wherein the length direction 101, the width direction 102 and the thickness direction 103 are perpendicular to each other.

Wherein, the extending direction of the cooling liquid channel 13 is parallel to the length direction 101, that is, the cooling liquid flows along the length direction 101 of the liquid cooling plate 10, in the embodiment of the present application, a cold flow is generated by the cooling liquid along the flow path of the cooling liquid channel 13, so as to realize heat exchange of the cooling liquid in the flow process.

In the present embodiment, "parallel" means a state in which the angle formed by two straight lines is-10 ° or more and 10 ° or less. The term "perpendicular" means a state in which the angle formed by two straight lines is 80 ° or more and 100 ° or less.

In the present embodiment, the maximum linear dimension of the heat exchange segment 131 in the width direction 102 is greater than the minimum linear dimension of the first contact segment 132 in the width direction 102, and the maximum linear dimension of the heat exchange segment 131 in the width direction 102 is less than the minimum linear dimension of the second contact segment 133 in the width direction 102.

In the present embodiment, linear dimensions refer to any linearly measured dimension taken between two points on or adjacent to a major surface. Illustratively, such linear dimensions may be the length, width, thickness, or other similar measured dimensions of the cold plate 10. Correspondingly, for the first contact section 132, the second contact section 133 or the heat exchange section 131 in the coolant flow channel 13, the average linear dimension refers to an arithmetic average of linear dimensions measured at each point of the section in any one of the length direction 101, the width direction 102 or the thickness direction 103. Illustratively, the average linearity of the liquid-cooled plate 10 in the width direction 102 refers to the average width of the liquid-cooled plate 10, the average linearity in the length direction 101 refers to the average length, and the average linearity in the thickness direction 103 refers to the average thickness.

According to the embodiment of the application, the maximum linear size of the heat exchange section 131 in the width direction 102 is larger than the minimum linear size of the first contact section 132 in the width direction 102, and the maximum linear size of the heat exchange section 131 in the width direction 102 is smaller than the minimum linear size of the second contact section 133 in the width direction 102, so that the single battery and the heat exchange section 131 can have a larger contact area, the heat exchange speed of the single battery in the heat exchange section 131 is favorably improved, and the integral temperature uniformity of the battery pack is favorably improved.

Specifically, in the embodiment of the present application, the entire liquid cooling plate 10 may have a shape with a wide middle part and narrow ends. Illustratively, the liquid cooling plate 10 may have various shapes such as a hexagon, an ellipse, a prism, a cross, a blade, etc., and is not particularly limited thereto.

In some embodiments, as shown in fig. 1, the linear dimensions of the first plate 11 and the second plate 12 in the width direction 102 increase and then decrease along the length direction 101. In this embodiment, the length direction 101 of the liquid cooling plate 10 is the same as the flowing direction of the cooling liquid in the cooling liquid channel 13, and the first contact section 132 and the second contact section 133 are respectively located at two ends of the heat exchanging section 131, so that the linear dimensions of the first plate 11 and the second plate 12 in the width direction 102 are increased first and then decreased, that is, the width variation trend of the first plate 11 and the second plate 12 is increased first and then decreased, and thus the width of the heat exchanging section 131 is greater than that of the first contact section 132 or the second contact section 133, so that the single battery can have a larger contact area with the heat exchanging section 131, and further the heat exchanging speed of the single battery in the heat exchanging section 131 is favorably improved, and further the temperature uniformity of the whole battery pack is favorably improved.

In some embodiments, as shown in fig. 1 and 2 in combination, the linear dimension of the coolant flow channel 13 in the thickness direction 103 along the length direction 101 decreases and then increases. In the embodiment of the present application, the length direction 101 of the liquid cooling plate 10 is the same as the flowing direction of the cooling liquid in the cooling liquid channel 13, and the first contact section 132 and the second contact section 133 are respectively located at two ends of the heat exchanging section 131, so that by setting the linear size of the cooling liquid channel 13 in the thickness direction 103 to decrease first and then increase, that is, the thickness variation trend of the cooling liquid channel 13 is to increase first and then decrease, the maximum cross-sectional area of the heat exchanging section 131 is smaller than the minimum cross-sectional area of the first contact section 132 and the maximum cross-sectional area of the heat exchanging section 131 is smaller than the minimum cross-sectional area of the second contact section 133, and further the heat exchanging speed of the heat exchanging section 131 can be increased.

In some embodiments, as shown in fig. 2, the first plate 11 includes a recess 121, the recess 121 being recessed toward the second plate 12, and/or the second plate 12 includes a recess 121, the recess 121 being recessed toward the first plate 11. The first plate body 11 and the second plate body 12 have uniform thickness, and the recess 121 on the first plate body 11 or the recess 121 on the second plate body 12 may be implemented by a stamping and bending process. Specifically, the recessed portion 121 may be disposed only on the first board 11, only on the second board 12, or both of the first board 11 and the second board 12. In addition, corresponding to the structure of the cooling liquid channel 13 in the embodiment of the present application, the recess 121 may be disposed at a position of the first plate 11 or the second plate 12 corresponding to the heat exchange segment 131. Thereby this application embodiment makes coolant liquid runner 13 include different cross-sectional areas in different regions through setting up depressed part 121 to this coolant liquid runner 13's radiating effect carries out the differentiation design, with this realization battery package temperature homogeneity.

In some embodiments, as shown in fig. 2, the first plate 11 further includes a first outer side surface 113 facing away from the second plate 12, the first outer side surface 113 is a plane, and the second plate 12 includes a recess 121, and the recess 121 is recessed toward the first plate 11. In this application embodiment, the thickness of the second plate body 12 is uniform, the depression 121 on the second plate body 12 can be realized by adopting a stamping and bending process to the second plate body 12, the average cross street area of the coolant flow channel 13 can be reduced by bending the second plate body 12, the process is simple, the thickness of the first plate body 11 or the second plate body 12 does not need to be changed, the material is saved, and the processing cost is reduced. In addition, the first outer side surface 113 is used for placing the single battery, and the first outer side surface 113 of the first plate 11 is set to be a plane, so that the single battery can be stably placed on the first plate 11, and the single battery can be conveniently assembled in the battery pack.

In some embodiments, as shown in fig. 3, the thickness of the first plate body 11 corresponding to the heat exchange section 131 is greater than the thickness of the first plate body 11 corresponding to the first contact section 132, the thickness of the first plate body 11 corresponding to the heat exchange section 131 is greater than the thickness of the first plate body 11 corresponding to the second contact section 133, and/or the thickness of the second plate body 12 corresponding to the heat exchange section 131 is greater than the thickness of the second plate body 12 corresponding to the first contact section 132, and the thickness of the second plate body 12 corresponding to the heat exchange section 131 is greater than the thickness of the second plate body 12 corresponding to the second contact section 133. The embodiment of the application can only thicken the thickness of the first plate body 11 corresponding to the heat exchange section 131 part, can only thicken the thickness of the second plate body 12 corresponding to the heat exchange section 131 part, and can also thicken the thickness of the first plate body 11 and the second plate body 12 corresponding to the heat exchange section 131 part. Wherein, the thickness corresponding to heat exchange section 131 through to first plate 11 or second plate 12 carries out thickening to can reduce first plate 11 and second plate 12 and can form the cross-sectional area of coolant liquid runner 13 in heat exchange section 131 department, thereby can make the coolant liquid velocity of flow increase when heat exchange section 131 through coolant liquid runner 13, thereby be favorable to increasing heat exchange section 131's heat transfer speed, and then be favorable to improving the temperature homogeneity of whole liquid-cooled plate 10.

In the embodiment of the present application, the thickness of the first plate 11 or the second plate 12 corresponding to the heat exchange segment 131 may be processed in various manners, and for example, the thickness may be formed by thickening the plate material of the first plate 11 or the second plate 12 corresponding to the heat exchange segment 131; it can also be formed by thickening and thinning the plate material of the first plate body 11 or the second plate body 12 corresponding to the first contact section 132 and the second contact section 133; or, the first plate body 11 or the second plate body 12 may be locally thickened by adopting a splicing manner such as adhesion or welding at a position corresponding to the heat exchange segment 131, and the thickness processing manner may be various, which is not specifically limited in the embodiment of the present application.

In some embodiments, as shown in fig. 4 and 5, the first plate body 11 and/or the second plate body 12 is provided with a heat sink 14. Specifically, the heat dissipation portion 14 may be provided only on the first plate 11, only on the second plate 12, or both the first plate 11 and the second plate 12. This application embodiment can increase the area of contact at heat transfer section 131 of coolant liquid and liquid cold plate 10 through the setting of radiating part 14 to the volume of the coolant liquid that flows through in the unit cross-sectional area increases, is favorable to the coolant liquid to take away more heats, and then is favorable to improving the radiating rate of liquid cold plate 10.

The heat dissipation part 14 includes a protrusion 141 and/or a groove 142, and the heat dissipation part 14 of the embodiment of the present application may be at least one of the protrusion 141 or the groove 142. The heat dissipation portion 14 may have a dot structure or a stripe structure. The number of the heat dissipation members 14 may be plural, and the adjacent heat dissipation members 14 are spaced apart from each other. Taking the example that the heat dissipation portion 14 includes a plurality of dot-shaped protrusions, the plurality of dot-shaped protrusions are distributed in an array on the first plate 11.

In some embodiments, with continued reference to fig. 4, the first plate 11 includes a first inner side surface 112 facing the second plate 12, the second plate 12 includes a second inner side surface 122 facing the first plate 11, and the heat sink 14 is disposed on the first inner side surface 112 and/or the second inner side surface 122. Specifically, the heat dissipation portion 14 according to the embodiment of the present invention may be provided only on the first inner side surface 112 of the first plate 11, only on the second inner side surface 122 of the second plate 12, or both the first inner side surface 112 and the second inner side surface 122. The heat dissipation part 14 is arranged on the first inner side surface 112 or the second inner side surface 122, so that the first outer side surface 113 or the second outer side surface 123 can be guaranteed to keep a plane structure, and stable placement of the single battery is facilitated.

In some embodiments, as shown in fig. 4, the heat sink 14 is a saw tooth structure or a wave structure. Because the inclined plane of sawtooth structure or raised grain structure can play the cushioning effect of coolant liquid, thereby can make heat dissipation portion 14 when the area of contact of first plate body 11 or second plate body 12 and coolant liquid of increase, can improve the guide effect to the coolant liquid, be favorable to accelerating the velocity of flow of coolant liquid, thereby can take away the heat faster, can also avoid the coolant liquid direct impact pipe wall, be favorable to avoiding liquid cold plate 10 impaired, and then be favorable to improving the life of liquid cold plate 10.

Of course, in other embodiments, the heat dissipation portion 14 is provided as a dot-shaped protrusion, and the heat dissipation portion 14 may also be a dot-shaped protrusion structure, a square-shaped protrusion structure, or other irregular protrusion structures. The heat dissipation portion 14 may be formed in other shapes such as an elongated shape, and the specific shape of the heat dissipation portion 14 is not limited herein.

In some embodiments, referring to fig. 6, each of the first board 11 and the second board 12 includes a side 111, the side 111 extends along the length direction 101, and the side 111 is an arc-shaped side 111. The arc side 111 of the embodiment of the application can make the side 111 in the heat exchange section 131 smooth transition between the first contact section 132 and the second contact section 133, so that the arc side 111 can guide and buffer the cooling liquid, thereby being beneficial to improving the uniformity of water flow and further being beneficial to improving the uniformity of heat dissipation of the liquid cooling assembly.

In some embodiments, the number of the liquid cooling plates 10 is plural, and the adjacent liquid cooling plates 10 are spaced apart. Illustratively, taking the number of the liquid cooling plates 10 as two as an example, the two liquid cooling plates 10 are arranged side by side along the width direction 102.

The liquid cooling assembly further comprises a first liquid collecting pipe 20 and a second liquid collecting pipe 30, the first liquid collecting pipe 20 and the second liquid collecting pipe 30 are respectively connected to two ends, far away from the heat exchange section 131, of the liquid cooling plate 10, and the first liquid collecting pipe 20 and the second liquid collecting pipe 30 are communicated with the cooling liquid flow channel 13. Illustratively, the first header pipe 20 and the second header pipe 30 are respectively provided at an inlet and an outlet of both ends of the liquid-cooled plate 10, so that the coolant flows into the coolant flow channel 13 via the first header pipe 20 and flows out of the second header pipe 30.

Specifically, in the embodiment of the present application, the first liquid collecting pipe 20, the second liquid collecting pipe 30 and the liquid cooling plate 10 may be detachably connected or fixedly connected. For example, the first and second

liquid collecting pipes

20 and 30 may be connected to the liquid cooling plate 10 by laser brazing, bonding, or the like. In addition, the first liquid collecting pipe 20 and the second liquid collecting pipe 30 can be connected with the liquid cooling plate 10 by adopting detachable connection modes such as threaded connection, plug-in connection and the like.

Of course, the first liquid collecting pipe 20, the second liquid collecting pipe 30 and the liquid cooling plate 10 can be integrally formed between the first liquid collecting pipe 20, the second liquid collecting pipe 30 and the liquid cooling plate 10. This is not particularly limited by the embodiments of the present application.

As shown in the combined drawings 7 and 8, the first liquid collecting tube 20 is provided with at least one water inlet 21, and the second liquid collecting tube 30 is provided with at least one water outlet 31. Specifically, the coolant enters the first liquid collecting pipe 20 from the water inlet 21, and after heat exchange is performed with the single battery when flowing through the coolant flow channel 13, the water temperature rises, and the coolant flows out from the water outlet 31 of the second liquid collecting pipe 30, so that heat dissipation and temperature reduction of the single battery are realized.

Wherein, the number of the water inlet 21 and the water outlet 31 can be respectively set to be one or more. Exemplarily, the first liquid collecting tube 20 may be provided with a water inlet 21, and the second liquid collecting tube 30 may be provided with a water outlet 31, so that the heat exchange of the coolant may be realized in a "one-inlet one-outlet" manner. Or, the first liquid collecting pipe 20 may be provided with a water inlet 21, and the second liquid collecting pipe 30 may be provided with a plurality of water outlets 31, so that the cooling liquid may exchange heat in a "one inlet and multiple outlet" manner. Of course, a plurality of water inlets 21 can be also opened on the first liquid collecting tube 20, and a plurality of water outlets 31 can be also opened on the second liquid collecting tube 30, so that the heat exchange of the cooling liquid can be realized in a mode of 'multi-inlet and multi-outlet', the circulation speed of the cooling liquid can be increased, and the heat exchange efficiency of the cooling liquid can be improved.

In order to better implement the liquid cooling subassembly of this application, this application embodiment still provides a battery package, includes foretell liquid cooling subassembly. For the specific structure of the liquid cooling assembly, please refer to the above embodiments. Since the battery pack of the embodiment of the present application adopts all technical solutions of all the embodiments described above, at least all the beneficial effects brought by the technical solutions of the embodiments described above are achieved, and are not described in detail herein.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments. In specific implementation, each unit or structure may be implemented as an independent entity, or may be combined arbitrarily to be implemented as the same entity or several entities, and specific implementation of each unit or structure may refer to the foregoing method embodiment, which is not described herein again.

The liquid cooling assembly and the battery pack provided by the embodiment of the present application are described in detail above, and a specific example is applied in the description to explain the principle and the implementation manner of the embodiment of the present application, and the description of the embodiment is only used to help understand the technical solution and the core idea of the embodiment of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims

1. A liquid cooling assembly, comprising a liquid cooling plate (10), the liquid cooling plate (10) comprising:

a first plate body (11);

the second plate body (12), the second plate body (12) is opposite to the first plate body (11) and is arranged at intervals to form a cooling liquid flow passage (13) located between the second plate body and the first plate body, the cooling liquid flow passage (13) comprises a heat exchange section (131), a first contact section (132) and a second contact section (133), the first contact section (132) and the second contact section (133) are both in fluid communication with the heat exchange section (131), the maximum cross-sectional area of the heat exchange section (131) is smaller than the minimum cross-sectional area of the first contact section (132), and the maximum cross-sectional area of the heat exchange section (131) is smaller than the minimum cross-sectional area of the second contact section (133).

2. The liquid cooling assembly of claim 1, wherein the liquid cooling plate (10) comprises a length direction (101), a width direction (102), and a thickness direction (103), wherein the length direction (101), the width direction (102), and the thickness direction (103) are perpendicular to each other;

the largest linear dimension of the heat exchange section (131) in the width direction (102) is larger than the smallest linear dimension of the first contact section (132) in the width direction (102), and the largest linear dimension of the heat exchange section (131) in the width direction (102) is smaller than the smallest linear dimension of the second contact section (133) in the width direction (102).

3. The liquid cooling assembly of claim 2, wherein the linear dimensions of the first plate (11) and the second plate (12) in the width direction (102) increase and decrease along the length direction (101).

4. The liquid cooling assembly of claim 2, wherein a linear dimension of the cooling liquid flow passage (13) in the thickness direction (103) decreases and increases along the length direction (101).

5. The liquid cooling assembly of claim 2, wherein the first plate (11) and the second plate (12) each comprise a side (111), the side (111) extending in the length direction (101), the side (111) being an arcuate side (111).

6. The liquid cooling assembly of claim 1, wherein the first plate (11) comprises a recess (121), the recess (121) being recessed toward the second plate (12), and/or wherein the second plate (12) comprises a recess (121), the recess (121) being recessed toward the first plate (11).

7. The liquid cooling assembly according to claim 1, wherein the thickness of the first plate body (11) corresponding to the heat exchanging section (131) is larger than the thickness of the first plate body (11) corresponding to the first contacting section (132), the thickness of the first plate body (11) corresponding to the heat exchanging section (131) is larger than the thickness of the first plate body (11) corresponding to the second contacting section (133), and/or,

the thickness of the second plate body (12) corresponding to the heat exchange section (131) is greater than the thickness of the second plate body (12) corresponding to the first contact section (132), and the thickness of the second plate body (12) corresponding to the heat exchange section (131) is greater than the thickness of the second plate body (12) corresponding to the second contact section (133).

8. A liquid cooled assembly according to any of claims 1-7, characterized in that the first plate body (11) and/or the second plate body (12) is provided with a heat sink portion (14), said heat sink portion (14) comprising protrusions (141) and/or grooves (142).

9. The liquid cooling assembly of claim 1, wherein the number of the liquid cooling plates (10) is multiple, adjacent liquid cooling plates (10) are arranged at intervals, the liquid cooling assembly further comprises a first liquid collecting pipe (20) and a second liquid collecting pipe (30), the first liquid collecting pipe (20) and the second liquid collecting pipe (30) are respectively connected to two ends of the liquid cooling plates (10) far away from the heat exchange section (131), and the first liquid collecting pipe (20) and the second liquid collecting pipe (30) are both communicated with the cooling liquid flow channel (13);

the first liquid collecting pipe (20) is provided with at least one water inlet (21), and the second liquid collecting pipe (30) is provided with at least one water outlet (31).

10. A battery pack comprising a liquid cooled assembly according to any of claims 1-9.