CN218896690U - Liquid cooling device - Google Patents

Abstract

The utility model discloses a liquid cooling device, comprising: the liquid cooling module is internally provided with a liquid flow passage which is suitable for introducing liquid to exchange heat with the liquid cooling module; the heat dissipation plate is connected with the liquid cooling module and is suitable for heat transfer, and the heat dissipation plate is suitable for being arranged in a lamination mode with the battery to dissipate heat of the battery. According to the liquid cooling device provided by the embodiment of the utility model, water cooling heat exchange can be realized, and the heat dissipation plate and the battery are arranged in a stacked manner, so that the heat exchange effect and further the heat exchange efficiency can be improved.

Description

Liquid cooling device

Technical Field

The utility model relates to the technical field of batteries, in particular to a liquid cooling device.

Background

With the increasing severity of environmental problems and energy problems in recent years, development and production of electric vehicles are increasingly emphasized, and the safety of power batteries serving as key components of electric vehicles is of great importance. In the related art, a mode of grouping small plastic modules is generally adopted for the soft package battery core, and an air cooling mode is adopted for the whole package heat dissipation. Because the current requirements on quick charge are higher and higher, the heating of the battery cell is aggravated in the quick charge process, and the air cooling can not meet the heat exchange requirement of cooling the battery cell.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent. Therefore, an object of the present utility model is to provide a liquid cooling device, which can realize water cooling heat exchange, and the heat dissipation plate and the battery are stacked, so that the heat exchange effect and further the heat exchange efficiency can be improved.

According to an embodiment of the present utility model, a liquid cooling apparatus includes: the liquid cooling module is internally provided with a liquid flow passage which is suitable for introducing liquid to exchange heat with the liquid cooling module; the heat dissipation plate is connected with the liquid cooling module and is suitable for heat transfer, and the heat dissipation plate is suitable for being arranged in a lamination mode with the battery to dissipate heat of the battery.

According to the liquid cooling device provided by the embodiment of the utility model, the liquid cooling module suitable for introducing liquid is arranged, the liquid cooling module is in heat exchange connection with the heat dissipation plate, water cooling heat exchange can be realized, and the heat dissipation plate and the battery are arranged in a stacked manner, so that the heat exchange effect and further the heat exchange efficiency can be improved.

In addition, the liquid cooling device according to the above embodiment of the present utility model may further have the following additional technical features:

in some examples of the utility model, the liquid cooling apparatus further comprises: the battery pack comprises a support frame, a battery holder and a battery holder, wherein the support frame is provided with a containing cavity which is configured to contain a battery; the heat dissipation plate is arranged on the support frame and is suitable for being matched with a battery placed in the accommodating cavity in a heat exchange mode.

In some examples of the present utility model, the support frame is configured in a frame shape, the heat dissipation plate is embedded on the support frame, and the accommodating cavity is divided into a first cavity and a second cavity opposite to each other in a depth direction, and the first cavity and the second cavity are respectively arranged at opposite sides of the heat dissipation plate and are suitable for placing a battery stacked with the heat dissipation plate.

In some examples of the utility model, the support frame includes first and second opposite side plates, the receiving chamber is located between the first and second side plates, the heat dissipation plate extends in a direction from the first side plate to the second side plate, and both ends of the heat dissipation plate are respectively embedded into the first and second side plates.

In some examples of the utility model, a hem portion is provided at the other end of the heat dissipation plate, and the hem portion is embedded in the second side plate.

In some examples of the present utility model, a distance between an end of the hemming portion and a side wall of the second side plate is L1, a distance between a side surface of the hemming portion opposite to the accommodation chamber and an inner surface of the second side plate is L2, and a thickness of the second side plate is H1, wherein L1 is equal to or greater than 0.8 mm, L2 is equal to or greater than 0.8 mm, H1/2 is equal to or greater than 2.5 mm, and H1 is equal to or less than 5 mm.

In some examples of the utility model, the first side plate and the second side plate are the same thickness.

In some examples of the present utility model, the liquid cooling module is disposed on the first side plate, and one end of the heat dissipation plate is fixedly connected to the liquid cooling module.

In some examples of the present utility model, the heat dissipation plate is fixedly connected to the liquid cooling module in a direction perpendicular to the liquid cooling module.

In some examples of the present utility model, the distance between the side edge of the liquid cooling module and the side edge of the first side plate is L3, the distance between the inner wall of the liquid flow channel and the outer surface of the first side plate is L4, the wall thickness of the liquid flow channel is T1, the width of the liquid cooling module is L5, and the width of the first side plate is L6, where 0.ltoreq.l4.ltoreq.3t1/4, 0.ltoreq.l3.ltoreq.l5/2, and L5.ltoreq.l6 are satisfied.

In some examples of the present utility model, the support frame further includes a third side plate and a fourth side plate opposite to each other, two ends of the third side plate are respectively connected to the first side plate and the second side plate, two ends of the fourth side plate are respectively connected to the first side plate and the second side plate, the first side plate, the second side plate, the third side plate and the fourth side plate surround the accommodating cavity, and sides of the heat dissipation plate are embedded into the third side plate and the fourth side plate.

In some examples of the present utility model, the liquid cooling module is connected to one side of the support frame, and one end of the heat dissipation plate is connected to the liquid cooling module and extends to the other side of the support frame.

Drawings

FIG. 1 is a schematic diagram of a liquid cooling apparatus according to some embodiments of the utility model.

FIG. 2 is an exploded view of a liquid cooling apparatus according to some embodiments of the utility model.

Fig. 3 isbase:Sub>A sectional view in the directionbase:Sub>A-base:Sub>A in fig. 1 (schematic view showing the case where the heat radiating plate and the liquid cooling module are connected to the support frame).

Fig. 4 is a schematic diagram of a portion of a liquid cooling apparatus (illustrating a liquid cooling module and a heat sink) according to some embodiments of the utility model.

Fig. 5 is a schematic view of a portion of a liquid cooling apparatus (showing a liquid cooling module and a heat dissipating plate) according to another embodiment of the present utility model.

Reference numerals:

100. a liquid cooling device; 10. a liquid cooling module; 101. a liquid cooling hole; 20. a heat dissipation plate; 21. a hemming section; 30. a support frame; 310. a receiving chamber; 301. a first chamber; 302. a second chamber; 31. a first side plate; 32. a second side plate; 33. a third side plate; 34. and a fourth side plate.

Detailed Description

In the related art, the battery adopts an air cooling mode to exchange heat, and when the battery generates heat and aggravates in the charging process, the air cooling can not meet the requirement of cooling the battery core, so that a liquid cooling device which adopts liquid cooling to dissipate heat of the battery core and the whole package and can reasonably heat the battery under the condition of low initial temperature of the battery is needed.

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

Referring to fig. 1 to 5, a liquid cooling apparatus 100 according to an embodiment of the present utility model includes: the liquid cooling module 10 and the heating panel 20, the liquid cooling module 10 is internally provided with a liquid runner suitable for being introduced with liquid to exchange heat with the liquid cooling module 10 so as to utilize a liquid heat exchange medium to exchange heat, specifically, the heating panel 20 can improve the heat exchange area of the liquid cooling device 100, the heating panel 20 is connected with the liquid cooling module 10 and is suitable for heat transfer, the heating panel 20 is suitable for being arranged with a battery in a lamination way so as to radiate heat of the battery, the heat exchange area of the heating panel 20 and the battery can be improved, and the volume of the battery can be reduced due to the arrangement of the battery and the heating panel 20 in a lamination way so as to be beneficial to space arrangement. That is, the liquid cooling module 10 has a liquid channel suitable for being introduced with a liquid heat exchange medium, the liquid cooling module 10 is in heat exchange connection with the heat dissipation plate 20, and the liquid cooling module 10 can exchange heat with the heat dissipation plate 20, thereby realizing water cooling heat exchange, being beneficial to increasing heat exchange area and improving heat exchange efficiency.

According to the liquid cooling device 100 of the embodiment of the utility model, the liquid cooling module 10 suitable for introducing liquid is arranged, the liquid cooling module 10 is in heat exchange connection with the heat dissipation plate 20, water cooling heat exchange can be realized, and the heat dissipation plate 20 and the battery are arranged in a stacked manner, so that the heat exchange effect and further the heat exchange efficiency can be improved.

In some embodiments of the present utility model, the liquid flow channel may be configured to have a plurality of liquid cooling holes 101, and liquid may flow through the plurality of liquid cooling holes 101, respectively, which may improve heat exchange uniformity. Further, the cross-sectional shape of the liquid cooling hole 101 may be rectangular, trapezoidal, circular, or elliptical, which is advantageous for the flow of liquid.

Referring to fig. 3 and 4, in the liquid cooling apparatus 100 according to an embodiment of the present utility model, the liquid flow channel includes three square liquid cooling holes 101, and in particular, when the liquid cooling module 10 has a square structure, the square liquid cooling holes 101 can improve space utilization and increase liquid throughput.

Referring to fig. 5, a liquid cooling apparatus 100 according to another embodiment of the present utility model includes three circular liquid cooling holes 101 in a liquid flow path to accommodate the flow of liquid.

Referring to fig. 1 and 2, in some embodiments of the present utility model, the liquid cooling apparatus 100 further includes: and a support frame 30, wherein the support frame 30 is provided with a containing cavity 310, and the containing cavity 310 is configured to contain a battery, and the heat dissipation plate 20 is arranged on the support frame 30 and is suitable for heat exchange fit with the battery placed in the containing cavity 310. Specifically, the support frame 30 may provide a mounting space and a supporting function for the heat dissipation plate 20 and the battery, which is advantageous in improving the integration effect and structural stability. That is, after the battery is accommodated in the accommodating cavity 310 and the heat dissipation plate 20 is mounted on the support frame 30, the stacked arrangement of the heat dissipation plate 20 and the battery can be directly realized, so that the assembly is convenient and the structure is facilitated to be simplified.

Referring to fig. 2, in some embodiments of the present utility model, the support frame 30 is configured in a frame shape to be suitable for being matched with a battery and to facilitate spatial arrangement, and the heat dissipation plate 20 is embedded on the support frame 30, so that the stability of connection of the heat dissipation plate 20 and the support frame 30 can be improved. Further, the heat dissipation plate 20 may divide the receiving cavity 310 into the first and second opposite cavities 301 and 302 in the depth direction, and the first and second cavities 301 and 302 are provided at opposite sides of the heat dissipation plate 20 and adapted to place the battery stacked with the heat dissipation plate 20. In other words, the first cavity 301 and the second cavity 302 may be used for placing the batteries, so that the heat dissipation plate 20 may exchange heat for the batteries in the first cavity 301 and the second cavity 302 at the same time, which is beneficial to improving heat exchange efficiency. In addition, the battery in the first cavity 301 and the battery in the second cavity 302 are respectively connected with the heat dissipation plate 20 in a lamination manner, so that a multi-layer lamination structure can be constructed on the liquid cooling device 100, the structural stability can be improved, and the volume of the liquid cooling device 100 can be reduced.

Referring to fig. 2 and 3, in some embodiments of the present utility model, the support frame 30 includes a first side plate 31 and a second side plate 32 opposite to each other, the accommodating cavity 310 is located between the first side plate 31 and the second side plate 32, the heat dissipation plate 20 extends along a direction from the first side plate 31 to the second side plate 32, and two ends of the heat dissipation plate 20 are respectively embedded into the first side plate 31 and the second side plate 32, so that stability of connection between the heat dissipation plate 20 and the support frame 30 can be improved, which is beneficial to improving structural strength of the liquid cooling device 100, and has simple structure and easy construction.

In some embodiments of the present utility model, referring to fig. 4, the other end of the heat dissipation plate 20 is provided with a folded portion 21, and the folded portion 21 is embedded in the second side plate 32, so that the stability of the connection between the heat dissipation plate 20 and the support frame 30 can be further improved, specifically, the heat dissipation plate 20 extends along the direction from the first side plate 31 to the second side plate 32, for example, the direction is the first direction, so that the first side plate 31 and the second side plate 32 can limit the heat dissipation plate 20 along the second direction perpendicular to the first direction, and the folded portion 21 is embedded in the second side plate 32, so that the heat dissipation plate 20 can be limited in the first direction or the third direction, and limitation in multiple directions can be realized, so that the stability of the structure is improved, and the heat dissipation plate 20 can be prevented from being deformed under stress or falling out from the support frame 30. Specifically, referring to fig. 2 and 3, the first direction may be an up-down direction, the second direction may be a front-back direction, and the third direction may be a left-right direction. According to the liquid cooling apparatus 100 of the embodiment of the utility model, the first side plate 31 is located below the heat dissipation plate 20, the second side plate 32 is located above the heat dissipation plate 20, the folded portion 21 extending in the front-rear direction is provided above the heat dissipation plate 20, at least a part of the heat dissipation plate 20 is embedded in the second side plate 32, and the folded portion 21 is embedded in the second side plate 32 and extends in the front-rear direction. Specifically, the upper edge of the heat dissipation plate 20 is connected to the flange portion 21, and an inverted L-shaped structure may be constructed at the upper portion of the heat dissipation plate 20.

More specifically, in some embodiments of the present utility model, with reference to FIG. 3, the distance between the end of the hemming portion 21 and the side wall of the second side plate 32 is L1, the distance between the surface of the hemming portion 21 opposite to the accommodating chamber 310 and the inner surface of the second side plate 32 is L2, and the thickness of the second side plate 32 is H1, wherein L1. Gtoreq.0.8 mm, L2. Gtoreq.H 1/2, and H1. Gtoreq.5 mm are satisfied. Specifically, the edge folding portion 21 at the upper portion of the heat dissipation plate 20 is integrally embedded in the second side plate 32 of the support frame 30, and after the edge folding portion 21 is embedded in the second side plate 32, both the end and the end face of the edge folding portion 21 are spaced a certain distance from the outer surface of the second side plate 32, that is, the second side plate 32 may have a certain thickness, and the edge folding portion 21 may be embedded in a relatively middle position of the second side plate 32, so as to improve the connection strength between the heat dissipation plate 20 and the support frame 30. More specifically, the distance L1 between the end of the hemming portion 21 and the side wall of the second side plate 32 may be 0.8 mm or more, for example, 1 mm or 1.2 mm or the like. In other words, the distance L may be changed by changing the width of the second side plate 32 extending in the front-rear direction or changing the length of the hemming portion 21 extending in the front-rear direction. Of course, the distance L1 between the end of the hemming portion 21 and the side wall of the second side plate 32 may be set to be less than 0.8 mm, for example, 0.5 mm or the like, depending on the actual situation. The lower surface of the hemming portion 21 and the lower surface of the second side plate 32 are spaced apart by a distance L2, wherein L2 may be 0.8 mm or more and half or less of the thickness of the second side plate 32 so that the hemming portion 21 may be inserted into the middle region of the second side plate 32.

In some embodiments of the present utility model, the first side plate 31 and the second side plate 32 have the same thickness, so that the manufacturing is facilitated, and the structural stability and balance are improved. For example, the dimensions of the second side plate 32 and the first side plate 31 are each 2.5 mm.ltoreq.H2 or 5 mm. Of course, the thicknesses of the first side plate 31 and the second side plate 32 may be set according to actual situations, for example, the thicknesses of the first side plate 31 and the second side plate 32 may be set to be less than 2.5 mm or more than 5 mm. The thicknesses of the first and second side plates 31 and 32 may be set according to the size of the battery or the heat dissipation plate 20, for example.

Further, in some embodiments of the present utility model, referring to fig. 1 and 3, the liquid cooling module 10 is disposed on the first side plate 31 and may be connected to the support frame 30, and one end of the heat dissipation plate 20 is fixedly connected to the liquid cooling module 10, so that both the heat dissipation plate 20 and the liquid cooling module 10 may be cooperatively connected to the support frame 30.

Specifically, in some embodiments of the present utility model, the heat dissipation plate 20 is fixedly connected to the liquid cooling module 10 along a direction perpendicular to the liquid cooling module 10, so that when the heat dissipation plate 20 is connected to the liquid cooling module 10, a T-shaped structure is formed, wherein a first side plate 31 is disposed at a position where the heat dissipation plate 20 is connected to the liquid cooling module 10, and the heat dissipation plate 20 and the liquid cooling module 10 can be connected to the support frame 30. More specifically, the heat dissipation plate 20 may be embedded in the first side plate 31, and the liquid cooling module 10 may be connected to the lower end of the first side plate 31.

Referring to fig. 3, in some embodiments of the present utility model, a distance between a side edge of the liquid cooling module 10 and a side edge of the first side plate 31 is L3, a distance between an inner wall of the liquid flow channel and an outer surface of the first side plate 31 is L4, a wall thickness of the liquid flow channel is T1, a width of the liquid cooling module 10 is L5, and a width of the first side plate 31 is L6, where 0.ltoreq.l4.ltoreq.3.t1/4, 0.ltoreq.l3.ltoreq.l5/2, and L5.ltoreq.l6 are satisfied. That is, the width and thickness of the liquid cooling module 10 are smaller than those of the first side plate 31, so that the supporting strength of the first side plate 31 to the liquid cooling module 10 can be improved, which is beneficial to improving the connection stability. Wherein, the distance L3 between the side edge of the liquid cooling module 10 and the side edge of the first side plate 31 is less than or equal to 1/2 of the width of the liquid cooling module 10, so as to ensure the connection stability of the liquid cooling module 10 and the supporting frame 30. The distance between the lower side of the first side plate 31 and the inner wall of the liquid flow channel is less than or equal to 3/4 of the wall thickness, so that at least a part of the liquid module or the liquid flow channel can be embedded into the first side plate 31, and the structural strength of the connection is improved.

In some embodiments of the present utility model, the support frame 30 further includes a third side plate 33 and a fourth side plate 34 opposite to each other, two ends of the third side plate 33 are respectively connected to the first side plate 31 and the second side plate 32, two ends of the fourth side plate 34 are respectively connected to the first side plate 31 and the second side plate 32, the first side plate 31, the second side plate 32, the third side plate 33 and the fourth side plate 34 enclose a receiving cavity 310, and sides of the heat dissipation plate 20 are embedded into the third side plate 33 and the fourth side plate 34. Specifically, the first side plate 31, the second side plate 32, the third side plate 33 and the fourth side plate 34 surround a quadrilateral structure, so that the structural stability of the support frame 30 can be improved, and the four side plates of the support frame 30 are matched with the heat dissipation plate 20, so that a plurality of sides of the heat dissipation plate 20 are embedded into the support frame 30, and the stability of connection between the heat dissipation plate 20 and the support frame 30 is improved.

In some embodiments of the present utility model, the liquid cooling module 10 is connected to one side of the support frame 30, and one end of the heat dissipation plate 20 is connected to the liquid cooling module 10 and extends to the other side of the support frame 30, so that the stability of the connection between the liquid cooling module 10 and the heat dissipation plate 20 and the support frame 30 can be improved. Specifically, the heat dissipation plate 20 may be a square plate, four sides of the heat dissipation plate 20 are embedded into four frames of the support frame 30, and the lower end of the heat dissipation plate 20 is fixedly connected with the upper end surface of the liquid cooling module 10 at the lower side of the support frame 30, so that the support frame 30 may be supported between the heat dissipation plate 20 and the liquid cooling module 10. In other words, the heat dissipation plate 20 is embedded in the support frame 30, so that heat dissipation of the battery in the support frame 30 can be facilitated, the liquid cooling module 10 is connected to the outer side of the support frame 30, liquid can be conveniently introduced into the liquid flow channel, and the overall structural stability of the cooling device can be improved.

According to the liquid cooling device 100 of the embodiment of the utility model, the heat dissipation plate 20 may be made of an aluminum material to improve the heat exchange effect, the support frame 30 may be made of a plastic material, so that the manufacturing is convenient, and the overall weight of the liquid cooling device 100 may be reduced, wherein the support frame 30 and the heat dissipation plate 20 may be integrally formed or may be a split structure.

Further, the utility model also provides a vehicle, and the liquid cooling device 100 is applied to the vehicle, so that the heat exchange effect of the battery can be improved, and the vehicle functionality can be improved.

A liquid cooling apparatus 100 according to an embodiment of the present utility model is described below with reference to the drawings.

Referring to fig. 1 to 5, according to the liquid cooling apparatus 100 of the embodiment of the present utility model, the heat dissipation plate 20 and the support frame 30 may be integrally connected by injection molding. The two soft package battery cells are adhered to the panels at the two sides of the heat dissipation plate 20 through glue, namely the front side and the rear side, so that the battery cells can be tightly adhered to the side of the heat dissipation plate 20 on a large scale. The glue can be aqueous pressure-sensitive adhesive or heat-conducting structural glue. In the process of heating the battery cell, heat is transferred to the side surface of the heat dissipation plate 20 from the battery cell, and then transferred to the T-shaped area at the bottom of the heat dissipation plate 20 from the side surface of the heat dissipation plate 20, and then transferred with the cooling liquid of the liquid flow channel in the liquid cooling die at the bottom of the heat dissipation plate 20.

Referring to fig. 2 and 3, the upper folded portion 21 of the heat sink 20 is integrally fitted into the support frame 30, and the left and right sides of the heat sink 20 are fitted into the third side plate 33 and the fourth side plate 34 of the support frame 30. Since the first side plate 31 of the support frame 30 is embedded in the partial area of the lower portion of the heat dissipating plate 20, the connection strength between the heat dissipating plate 20 and the support frame 30 can be effectively ensured by the embedding design of the heat dissipating plate 20 and the support frame 30.

Further, referring to fig. 1 to 3, the bottom (or lower portion) of the heat sink 20 and the liquid cooling module 10 form an inverted T-shaped structure, and the upper portion of the heat sink 20 and the hemming portion 21 form an inverted L-shaped structure. The entire inverted L-shaped region on the upper part of the heat sink 20 is fitted into the second side plate 32 of the support frame 30, and at least a part of the inverted T-shaped region at the junction of the heat sink 20 and the liquid cooling module 10 is fitted into the first side plate 31 of the support frame 30. A plurality of liquid cooling holes 101 are formed in the liquid flow passage, and the cooling liquid flows through the liquid flow passage formed by the liquid cooling holes 101, thereby transferring heat with the heat dissipation plate 20. The cross-sectional shape of the liquid cooling hole 101 is rectangular, trapezoidal, circular, or elliptical, which is favorable for the flow of liquid.

Still further, with reference to fig. 4, T1 is the wall thickness of the heat dissipating plate 20, and T1 may range from 0.5 mm to 1.5 mm. T2 is the thickness of the elevation area of the heat dissipation plate 20, and T2 can range from 0.4 mm to 3 mm. The values of T1 and T2 should not be too small, otherwise, the thickness of the heat dissipation plate 20 is too thin, so that the rigidity is insufficient, and the support of the battery cell is affected. The values of T1 and T2 should not be too large, otherwise, the thickness of the heat dissipation plate 20 is too thick, which affects the heat dissipation effect and causes the weight increase of the whole package.

In fig. 3, H1 and H2 are thicknesses of the support frame 30, and H1 may range from 2.5 mm to 5 mm, and H2 may range from 2.5 mm to 5 mm. The thickness of the supporting frame 30 needs to be reasonably selected according to requirements, the injection molding quality can be affected by too thick thickness, and the rigidity/strength of the part cannot meet the requirements due to too thin thickness.

In FIG. 3, L1, L2 and L3 are distances between the heat dissipating plate 20 and the outer surface of the support frame 30, and these dimensions determine the injection bonding strength of the heat dissipating plate 20 and the support frame 30, wherein L1. Gtoreq.0.8 mm, 0.8 mm.ltoreq.L2.ltoreq.H2/2, and 0.ltoreq.L3.ltoreq.L5/2 are satisfied.

L4 is the distance between the bottom surface of the heat sink 20 and the bottom surface of the support frame 30, and this dimension affects the bonding strength between the heat sink 20 and the support frame 30, and also affects the contact state between the bottom surface of the heat sink 20 and the liquid cooling module 10. If this value is too small, it is easy to make the bottom of the heat sink 20 contact the liquid cooling module 10 completely when the control of the tolerance of the parts of the support frame 30 is not reasonable. Wherein, L4 is more than or equal to 0 and less than or equal to 3T 1/4.

In fig. 3, L6 is the width of the support frame 30, L5 is the bottom width of the heat sink 20, and this width affects the joint area between the heat sink 20 and the support frame 30, and further affects the joint strength of the two, and this width determines the cross-sectional area of the flow channel region. The bottom width of the heat sink 20 should be as wide as possible to ensure sufficient bonding strength between the heat sink 20 and the support frame 30, while ensuring sufficient flow area to accommodate the coolant to achieve rapid heat transfer therein, L5-L6.

According to the liquid cooling device 100 of the embodiment of the utility model, the bottom of the heat dissipation plate 20 is provided with the liquid cooling hole 101, and the cooling liquid flows through the liquid cooling hole 101 at the bottom of the heat dissipation plate 20, so that the heat transfer process from the battery cell to the heat dissipation plate 20 and then to the cooling liquid is performed, and the rapid heat dissipation effect of the battery cell under the condition of rapid charge or other abnormal heat generation is achieved. Correspondingly, the battery cell can be heated within a certain range under the condition of low initial temperature of the battery cell, so that the battery cell can be charged and discharged smoothly and efficiently.

In the description of the present utility model, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "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 utility model and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and therefore 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 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 utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, 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; can be mechanically or electrically connected; 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 utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, 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.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 present utility model. 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 utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, 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 utility model.

Claims (10)

1. A liquid cooling apparatus, comprising:

the liquid cooling module is internally provided with a liquid flow passage which is suitable for introducing liquid to exchange heat with the liquid cooling module;

and the heat dissipation plate is connected with the liquid cooling module and is suitable for heat transfer, and the heat dissipation plate is suitable for being arranged in a lamination way with the battery to dissipate heat of the battery.

2. The liquid cooling apparatus according to claim 1, further comprising:

the battery pack comprises a support frame, a battery holder and a battery holder, wherein the support frame is provided with a containing cavity which is configured to contain a battery;

the heat dissipation plate is arranged on the support frame and is suitable for being matched with a battery placed in the accommodating cavity in a heat exchange mode.

3. The liquid cooling apparatus according to claim 2, wherein the support frame is configured in a frame shape, the heat radiation plate is embedded on the support frame, and the accommodation chamber is divided into a first chamber and a second chamber which are opposite in a depth direction, the first chamber and the second chamber are respectively arranged on opposite sides of the heat radiation plate, and are adapted to hold a battery stacked with the heat radiation plate; and/or

The liquid cooling module is connected to one side of the supporting frame, and one end of the heat dissipation plate is connected with the liquid cooling module and extends to the other side of the supporting frame.

4. The liquid cooling apparatus according to claim 3, wherein the support frame includes a first side plate and a second side plate opposite to each other, the accommodation chamber is located between the first side plate and the second side plate, the heat dissipation plate extends in a direction from the first side plate to the second side plate, and both ends of the heat dissipation plate are respectively embedded into the first side plate and the second side plate.

5. The liquid cooling apparatus according to claim 4, wherein a flange portion is provided at the other end of the heat radiation plate, and the flange portion is embedded in the second side plate.

6. The liquid cooling apparatus according to claim 5, wherein a distance between an end of the hemming portion and a side wall of the second side plate is L1, a distance between a side surface of the hemming portion opposite to the accommodation chamber and an inner surface of the second side plate is L2, and a thickness of the second side plate is H1, wherein L1 is 0.8 mm or more, L2 is 0.8 mm or less, H1/2, H1 is 2.5 mm or less, 5 mm or less, and/or

The first side plate and the second side plate have the same thickness.

7. The liquid cooling device according to claim 4, wherein the liquid cooling module is disposed on the first side plate, and one end of the heat dissipation plate is fixedly connected with the liquid cooling module.

8. The liquid cooling device according to claim 7, wherein the heat radiation plate is fixedly connected to the liquid cooling module in a direction perpendicular to the liquid cooling module; and/or

The distance between the side edge of the liquid cooling module and the side edge of the first side plate is L3, the distance between the inner wall of the liquid flow channel and the outer surface of the first side plate is L4, the wall thickness of the liquid flow channel is T1, the width of the liquid cooling module is L5, and the width of the first side plate is L6, wherein the L4 is more than or equal to 0 and less than or equal to 3, T1/4, L3 is more than or equal to 0 and less than or equal to 3 and less than or equal to L5/2, and L5 is less than or equal to L6.

9. The liquid cooling device according to claim 4, wherein the supporting frame further comprises a third side plate and a fourth side plate which are opposite to each other, two ends of the third side plate are respectively connected with the first side plate and the second side plate, two ends of the fourth side plate are respectively connected with the first side plate and the second side plate, the first side plate, the second side plate, the third side plate and the fourth side plate surround the accommodating cavity, and the side edges of the heat dissipation plate are embedded into the third side plate and the fourth side plate.

10. The liquid cooling device according to claim 2, wherein the liquid cooling module is connected to one side of the support frame, and one end of the heat dissipation plate is connected to the liquid cooling module and extends to the other side of the support frame.

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