Cooling assembly and battery pack

Abstract

The utility model discloses a cooling assembly and a battery pack. The cooling assembly comprises a plate body; a plurality of first flow channels and a plurality of second flow channels are arranged in the plate body, the first flow channels are communicated with an inlet in the plate body, and the second flow channels are communicated with an outlet in the plate body; a plurality of third flow channels which are distributed at intervals are further arranged in the plate body, the extending directions of the third flow channels intersect with the extending directions of the first flow channels and the extending directions of the second flow channels, the third flow channels communicate with the first flow channels and the second flow channels to form cooling channels, and the cooling channels are used for circulating cooling media. Therefore, the first flow channel and the second flow channel are communicated through the third flow channel to form a plurality of cooling channels, and the cooling medium in each cooling channel can form a circulation loop, so that the distribution uniformity of the cooling medium at different positions in the plate body is improved, and the heat dissipation uniformity is further improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of cold plate heat dissipation, and particularly relates to a cooling assembly and a battery pack. BACKGROUND

[0002] There are various cooling methods for electric vehicle battery packs, and the liquid cooling method accounts for the vast majority; the liquid cooling heat dissipation method of the battery pack needs to use a liquid cooling plate to realize heat exchange between the battery pack and the cooling liquid; and the design of the plate body, especially the design of the flow channel, is the key to temperature balance of the battery cell.

[0003] In the related art, the flow channel in the liquid cooling plate is formed by connecting a plurality of sub-flow channels in series, and the cooling medium in the existing plate body flows into the plate body from the inlet of the plate body, and then flows out of the plate body from the outlet of the plate body. However, since the cooling medium flows through a long path in a single flow channel, the energy loss is large, resulting in uneven cooling effect at different positions of the liquid cooling plate. CONTENT OF THE UTILITY MODEL

[0004] The application aims to provide a cooling assembly and a battery pack, which can solve the problem of uneven cooling effect at different positions of the liquid cooling plate due to the long path of the cooling medium in a single flow channel and the large energy loss.

[0005] In order to solve the above technical problems, the application is implemented as follows:

[0006] In a first aspect, the embodiments of the application provide a cooling assembly, comprising: a plate body; a plurality of first flow channels and a plurality of second flow channels are arranged in the plate body, the first flow channels are in communication with the inlet in the plate body, and the second flow channels are in communication with the outlet in the plate body; a plurality of third flow channels are arranged in the plate body in a spaced manner, the extension directions of the third flow channels are perpendicular to the extension directions of the first flow channels and the second flow channels, respectively, and the third flow channels communicate with the first flow channels and the second flow channels to form cooling channels, and the cooling channels are used to circulate cooling medium.

[0007] Optionally, the plurality of first flow channels and the plurality of second flow channels are arranged alternately in a spaced manner.

[0008] Optionally, the extension directions of the first flow channels and the second flow channels are a first direction, the extension direction of the third flow channels is a second direction, the first flow channels have a first center line along the first direction, the second flow channels have a second center line along the first direction, the third flow channels have a third center line along the second direction, the distance between the first center line and the third center line in a third direction is greater than zero; and / or, the distance between the second center line and the third center line in the third direction is greater than zero; and the third direction is perpendicular to the first direction and the second direction, respectively.

[0009] Optionally, the first flow channel has a first end and a second end arranged oppositely along the first direction, the first end being close to the inlet in the plate body; from the first end to the second end, the flow cross-sectional area of the first flow channel gradually increases.

[0010] Optionally, the plate body comprises a first plate body and a second plate body; the first plate body and the second plate body are arranged in layers; the first flow channel and the second flow channel are arranged in the first plate body; and the third flow channel is arranged in the second plate body.

[0011] Optionally, one side of the first plate body facing the second plate body is provided with first grooves and second grooves arranged alternately, the second plate body covers the first grooves and the second grooves to form the first flow channel and the second flow channel respectively; and / or one side of the second plate body facing the first plate body is provided with third grooves arranged at intervals, and the first plate body covers the third grooves to form the third flow channel.

[0012] Optionally, the plate body further comprises a third plate body; the third plate body is connected with the first plate body and the second plate body, and one side of the third plate body away from the first plate body and the second plate body is provided with the inlet; the third plate body is provided with a flow distribution cavity in communication with the inlet, and the flow distribution cavity is in communication with a plurality of the first flow channels.

[0013] Optionally, the flow distribution cavity is provided with at least one flow distribution plate; the at least one flow distribution plate separates the flow distribution cavity into a plurality of sub-flow distribution cavities, and the sub-flow distribution cavities are in communication with the first flow channels.

[0014] Optionally, the third plate body has a third end and a fourth end arranged oppositely along the first direction, the third end facing the first plate body; from the fourth end to the third end, the flow cross-sectional area of the flow distribution cavity gradually increases.

[0015] Optionally, one side of the third plate body away from the first plate body and the second plate body is further provided with the outlet; the third plate body is provided with a flow convergence cavity in communication with the outlet, and the flow convergence cavity is in communication with a plurality of the second flow channels.

[0016] Optionally, the third plate body has a third end and a fourth end arranged oppositely along the first direction, the third end facing the first plate body; from the third end to the fourth end, the flow cross-sectional area of the flow convergence cavity gradually decreases.

[0017] Optionally, the second plate body is provided with a plurality of fourth flow channels near one side of the third plate body; the third flow channels extend in a second direction, and the plurality of fourth flow channels are arranged at intervals along the second direction, each fourth flow channel corresponding to one second flow channel, one end of the fourth flow channel being in communication with the second flow channel, and the other end of the fourth flow channel being in communication with the converging cavity.

[0018] Optionally, the first plate body and the second plate body are arranged in a third direction, and the converging cavity and the diverging cavity are arranged at intervals along the third direction.

[0019] Optionally, the cooling assembly further comprises a pipeline and an adjusting member; one end of the pipeline is connected with the inlet, the other end of the pipeline is used to be connected with an external liquid supply device, and the adjusting member is arranged in the pipeline and used to adjust the flow rate of the cooling medium.

[0020] Optionally, the adjusting member comprises a valve and a controller; the valve is arranged in the pipeline, and the controller is electrically connected with the valve and used to control the operation of the valve to adjust the flow rate of the cooling medium.

[0021] In a second aspect, the embodiments of the present application provide a battery pack comprising the cooling assembly as any of the above embodiments.

[0022] In the embodiments of the present application, by arranging a plurality of first flow channels and a plurality of second flow channels and a plurality of third flow channels arranged at intervals in the plate body, the first flow channels are in communication with the inlet in the plate body, the second flow channels are in communication with the outlet in the plate body, and the third flow channels communicate the first flow channels and the second flow channels. In this way, the plurality of cooling channels can be formed by the third flow channels communicating the first flow channels and the second flow channels, the cooling medium in each cooling channel can form a circulation loop, the uniformity of the distribution of the cooling medium at different positions in the plate body is increased, and the uniformity of heat dissipation is further improved.

[0023] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter.

[0024] from the following description read in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0025] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which:

[0026] Figure 1 is a schematic view of the cooling assembly of the embodiments of the present application from one perspective;

[0027] Figure 2 is a schematic view of the cooling assembly of the embodiments of the present application from another perspective;

[0028] Figure 3 is a partial structural schematic diagram of a cooling assembly of an embodiment of the present application;

[0029] Figure 4 is a matching structural schematic diagram of a first plate body and a second plate body of an embodiment of the present application;

[0030] Figure 5 is a schematic diagram of a first plate body of an embodiment of the present application;

[0031] Figure 6 is a top view of a partial structure of a first plate body of an embodiment of the present application;

[0032] Figure 7 is a schematic diagram of a second plate body of an embodiment of the present application;

[0033] Figure 8 is a schematic diagram of a third plate body of an embodiment of the present application from one perspective;

[0034] Figure 9 is a schematic diagram of a third plate body of an embodiment of the present application from another perspective;

[0035] Figure 10 is a schematic diagram of an adjusting member of an embodiment of the present application;

[0036] Figure 11 is a schematic diagram of a flow rate of an embodiment of the present application.

[0037] Reference signs:

[0038] 1 - first flow channel; 2 - second flow channel; 3 - third flow channel; 4 - plate body; 5 - first end; 6 - second end; 7 - first groove; 8 - second groove; 9 - third groove; 10 - inlet; 11 - outlet; 12 - flow separation cavity; 13 - flow convergence cavity; 14 - fourth flow channel; 15 - flow separation plate; 16 - flow convergence plate; 17 - third end; 18 - fourth end; 19 - pipeline; 20 - adjusting member; 21 - protrusion; 41 - first plate body; 42 - second plate body; 43 - third plate body; X - first direction; Y - second direction; Z - third direction. DETAILED DESCRIPTION

[0039] Embodiments of the present application will be described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0040] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0041] In the description of this application, 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., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] The cooling components and battery packs provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0044] like Figures 1-4 As shown, a cooling assembly according to some embodiments of this application includes: a plate 4; the plate 4 has a plurality of first flow channels 1 and a plurality of second flow channels 2, the first flow channels 1 communicating with an inlet 10 in the plate 4, and the second flow channels 2 communicating with an outlet 11 in the plate 4; the plate 4 also has a plurality of spaced third flow channels 3, the extension direction of the third flow channels 3 intersecting the extension directions of the first flow channels 1 and the second flow channels 2 respectively, and the third flow channels 3 connecting the first flow channels 1 and the second flow channels 2 to form a cooling system.

[0045] Cooling channels are used to circulate cooling media.

[0046] In the embodiments of the present application, the first flow channels 1 and the second flow channels 2 are arranged in the plate body 4, and the third flow channels 3 are arranged in the plate body 4. The first flow channels 1 are in communication with the inlet 10 in the plate body 4, the second flow channels 2 are in communication with the outlet 11 in the plate body 4, and the third flow channels 3 are in communication with the first flow channels 1 and the second flow channels 2. In this way, the first flow channels 1 and the second flow channels 2 are connected by the third flow channels 3 to form a plurality of cooling channels. The cooling medium in each cooling channel forms a circulation loop, which increases the uniformity of the distribution of the cooling medium in different positions of the plate body 4, and further improves the uniformity of heat dissipation. At the same time, the present application adopts the technical concept of flow separation while flowing, which avoids the problem of large flow resistance caused by long flow distance of the cooling medium.

[0047] In some embodiments, as shown in Figure 3 , the extension direction of the first flow channels 1 and the extension direction of the second flow channels 2 are parallel to each other, and the extension direction of the third flow channels 3 is perpendicular to the extension direction of the first flow channels 1 and the extension direction of the second flow channels 2.

[0048] In other embodiments, the number of the first flow channels 1 and the second flow channels 2 can be the same, so that the flow rate of the cooling medium flowing into the first flow channels 1 and the flow rate of the cooling medium flowing out of the second flow channels 2 are matched.

[0049] Optionally, as shown in Figure 3 , the plurality of first flow channels 1 and the plurality of second flow channels 2 are arranged alternately and spaced apart.

[0050] In the embodiments of the present application, the plurality of first flow channels 1 and the plurality of second flow channels 2 are arranged alternately and spaced apart. In this way, the adjacent first flow channels 1 and second flow channels 2 are connected with the third flow channels 3 to form a plurality of cooling channels, so as to shorten the length of the cooling channels and improve the cooling efficiency.

[0051] In some embodiments, as shown in Figure 3 , the plurality of first flow channels 1 and the plurality of second flow channels 2 are arranged alternately and spaced apart, which can be arranged in the manner of one first flow channel 1, one second flow channel 2, one first flow channel 1, one second flow channel 2; or in the manner of two first flow channels 1, two second flow channels 2, two first flow channels 1, two second flow channels 2.

[0052] In addition, the plurality of first flow channels 1 and the plurality of second flow channels 2 can be arranged alternately and spaced apart in the manner of one first flow channel 1, two second flow channels 2, one first flow channel 1, two second flow channels 2. Of course, the arrangement manner of the first flow channels 1 and the second flow channels 2 can be flexibly arranged according to actual needs, which is not limited in the embodiments of the present application.

[0053] Optionally, as shown in Figure 3As shown, the extending direction of the first flow channel 1 and the second flow channel 2 is the first direction X, the extending direction of the third flow channel 3 is the second direction Y, the first flow channel 1 has a first center line along the first direction X, the second flow channel 2 has a second center line along the first direction X, the third flow channel 3 has a third center line along the second direction Y, and the distance between the first center line and the third center line in the third direction Z is greater than zero.

[0054] In the embodiments of the present application, the distance between the first center line and the third center line in the third direction Z is greater than zero. In this way, the first flow channel 1 and the third flow channel 3 can have a height difference in the third direction Z, so that the flow direction of the cooling medium in the third direction Z changes by 90°, forming an impinging jet, improving the thermal boundary layer problem caused by the surface flow of the cooling medium, and improving the heat dissipation efficiency.

[0055] Optionally, the distance between the second center line and the third center line in the third direction Z is greater than zero.

[0056] In the embodiments of the present application, the distance between the second center line and the third center line in the third direction Z is greater than zero. In this way, the second flow channel 2 and the third flow channel 3 have a height difference in the third direction Z, so that the flow direction of the cooling medium in the third direction Z changes by 90°, forming an impinging jet, improving the thermal boundary layer problem caused by the surface flow of the cooling medium, and improving the heat dissipation efficiency.

[0057] In some embodiments, as shown in Figure 4 The protrusion 21 is arranged between the first flow channel 1 and the second flow channel 2, and the third flow channel 3 can be arranged in the protrusion 21 to communicate the first flow channel 1 and the second flow channel 2.

[0058] In some embodiments, as shown in Figure 4 The protrusion 21 is arranged between the first flow channel 1 and the second flow channel 2 to separate the first flow channel 1 and the second flow channel 2, and the third flow channel 3 can be arranged on the upper layer of the first flow channel 1 and the second flow channel 2. In this way, the cooling medium flows from the first flow channel 1, and then enters the channel formed by the third flow channel 3 and the protrusion 21 to form a jet impact.

[0059] In yet some embodiments, as shown in Figure 4As shown, the cooling medium flows in from the first channel 1. At the junction of the first channel 1 and the third channel 3, the cooling medium splits into two branches, and the flow direction of the cooling medium changes for the first time, that is, the cooling medium flows from the first direction X to the third direction Z. The cooling medium flowing in the third direction Z splits into two branches again in the third channel 3, flowing along the extension direction of the third channel 3 respectively. Then the cooling medium flows into the second channel 2 through the third channel 3. At this time, the flow direction of the cooling medium changes for the second time, that is, the cooling medium flows from the second direction Y to the third direction Z.

[0060] The flow direction of the cooling medium changes twice along the third direction Z to form two impact jets, increasing the turbulence of the cooling medium in the third channel 3 and improving the heat dissipation efficiency of the cooling medium.

[0061] It should be noted that the third flow channel 3 is close to the heat source. The cooling medium flows in the third flow channel 3 to form a jet surface. The jet surface is the inner surface of the cooling medium in the third flow channel 3 that is close to the heat source when the cooling medium forms an impact jet. Therefore, the jet surface formed by the cooling medium will carry away more heat to further improve the heat dissipation capacity.

[0062] Optionally, such as Figures 1-6 As shown, the first flow channel 1 has a first end 5 and a second end 6 arranged opposite to each other along the first direction X, with the first end 5 being the inlet 10 near the plate 4; from the first end 5 to the second end 6, the flow cross-sectional area of ​​the first flow channel 1 gradually increases.

[0063] In this embodiment of the application, the cross-sectional area of ​​the first flow channel 1 is gradually increased from the first end 5 to the second end 6, so as to ensure the uniformity of the flow rate of the cooling medium when it flows from the first flow channel 1 into the third flow channel 3, and improve the uniformity of heat dissipation of the cooling medium in the third flow channel 3.

[0064] In some embodiments, the flow cross-sectional area of ​​the first end 5 and the flow cross-sectional area of ​​the second end 6 in the first flow channel 1 can be adjusted by simulation calculation to achieve uniform distribution of the cooling medium in the first flow channel 1.

[0065] In some other embodiments, such as Figures 5-6 As shown, from the first end 5 to the second end 6, the slope of the boundary line between the sidewall and the bottom of the first flow channel 1 can be a fixed slope so that the flow cross-sectional area increases linearly; of course, the slope of the boundary line between the sidewall and the bottom of the first flow channel 1 can also be a non-fixed slope so that the flow cross-sectional area increases non-linearly. This embodiment of the application does not impose any limitations on this.

[0066] In some embodiments, the flow passage cross-sectional area of the second flow channel 2 and the third flow channel 3 is a fixed value, and the flow passage cross-sectional area of the second flow channel 2 and the third flow channel 3 needs to have a certain relationship with the flow passage cross-sectional area of the first flow channel 1, so as to form an impinging jet and improve the flexibility of the cooling assembly. For example, for a high-power battery, the heat flux is high, the size and spacing distance of the third flow channel 3 can be reduced, and the number of the third flow channel 3 can be increased to increase the heat dissipation area of the third flow channel 3. For a low-power battery pack, the heat flux is low, the size and spacing distance of the third flow channel 3 can be increased, and the number of the third flow channel 3 can be reduced to reduce the heat dissipation area of the third flow channel 3.

[0067] It should be noted that the flow passage cross-sectional area of the first flow channel 1 is the cross-sectional area of the first flow channel 1 along the direction perpendicular to the first direction X.

[0068] Optionally, as shown in Figures 1-4 the plate body 4 includes a first plate body 41 and a second plate body 42; the first plate body 41 and the second plate body 42 are stacked; the first flow channel 1 and the second flow channel 2 are arranged in the first plate body 41; and the third flow channel 3 is arranged in the second plate body 42.

[0069] Specifically, the stacking direction of the first plate body 41 and the second plate body 42 is the third direction Z, and the extension direction of the third flow channel 3 is the second direction Y.

[0070] In the embodiments of the present application, the first flow channel 1 and the second flow channel 2 are arranged in the first plate body 41, the third flow channel 3 is arranged in the second plate body 42, and the first plate body 41 and the second plate body 42 are stacked. In this way, the processing of the first flow channel 1, the second flow channel 2 and the third flow channel 3 is facilitated, and the production cost is reduced.

[0071] In some embodiments, the first flow channel 1 and the second flow channel 2 can be completely arranged in the first plate body 41, the third flow channel 3 can be completely arranged in the second plate body 42, and a through hole is arranged on the side of the first flow channel 1 and the third flow channel 3 to communicate the first flow channel 1 and the third flow channel 3; a through hole is arranged on the side of the second flow channel 2 and the third flow channel 3 to communicate the second flow channel 2 and the third flow channel 3.

[0072] Optionally, as shown in Figures 1-7 the first plate body 41 is provided with first grooves 7 and second grooves 8 arranged alternately on the side facing the second plate body 42, and the second plate body 42 covers the first grooves 7 to form the first flow channel 1.

[0073] In this embodiment, alternating first grooves 7 and second grooves 8 are provided on the side of the first plate 41 facing the second plate 42. The second plate 42 covers the first grooves 7 and second grooves 8 to form a first flow channel 1 and a second flow channel 2, respectively. In this way, the first grooves 7 and second grooves 8 in the first plate 41 cooperate with the second plate 42 to form the first flow channel 1 and the second flow channel 2, which facilitates the processing of the first grooves 7 and second grooves 8 in the first plate 41 and also facilitates installation.

[0074] Optionally, such as Figures 1-7 As shown, the second plate 42 has a third groove 9 arranged at intervals on the side facing the first plate 41, and the first plate 41 covers the third groove 9 to form a third flow channel 3.

[0075] In this embodiment of the application, by providing a spacer on the side of the second plate 42 facing the first plate 41

[0076] The third groove 9 is arranged in a spaced manner, and the first plate 41 is placed on the third groove 9 to form a third flow channel 3. In this way, the third groove 9 in the second plate 42 and the first plate 41 cooperate to form the third flow channel 3, which facilitates the processing of the third groove 9 in the second plate 42 and also facilitates installation.

[0077] In some embodiments, the first groove 7 and the second groove 8 in the first plate 41 and the third groove 9 in the second plate 42 can be formed by stamping, and then the first plate 41 and the second plate 42 can be sealed and welded by brazing process to form the first flow channel 1, the second flow channel 2 and the third flow channel 3.

[0078] Optionally, Figures 1-9 As shown, the plate 4 also includes a third plate 43; the third plate 43 is connected to the first plate 41 and the second plate 42, and the third plate 43 is provided with an inlet 10 on the side away from the first plate 41 and the second plate 42. The third plate 43 is provided with a diversion cavity 12 that communicates with the inlet 10, and the diversion cavity 12 communicates with multiple first flow channels 1.

[0079] In this embodiment, an inlet 10 is provided on the side of the third plate 43 away from the first plate 41 and the second plate 42. The inlet 10 is connected to the flow distribution cavity 12, which is connected to multiple first flow channels 1. This allows the cooling medium to be distributed through the flow distribution cavity 12, improving the uniformity of the cooling medium distribution. Simultaneously, the stacked structure of the first plate 41 and the second plate 42 achieves the effect of unilateral entry and exit of the cooling medium, reducing the structural size of the cooling assembly and solving the problem of excessively large cold plate area or volume caused by side-entry or top-entry / top-exit cooling medium methods in the prior art.

[0080] In some embodiments, the third plate body 43 is integrally formed by casting, and is sealingly connected to the first plate body 41 and the second plate body 42 by welding.

[0081] Optionally, as shown in Figure 8 At least one shunt plate 15 is arranged in the shunt cavity 12; the at least one shunt plate 15 divides the shunt cavity 12 into a plurality of sub-shunt cavities 12, and the sub-shunt cavities 12 are in communication with the first flow channels 1.

[0082] In the embodiments of the present application, the shunt plate 15 is arranged in the shunt cavity 12, and the shunt plate 15 divides the shunt cavity 12 into a plurality of sub-shunt cavities, and the sub-shunt cavities are in communication with the first flow channels 1. In this way, when the cooling medium enters the shunt cavity 12, it can enter the plurality of sub-shunt cavities uniformly through the shunt plate 15, and then flow into the first flow channels 1, so as to make the flow of each first flow channel 1 uniform.

[0083] In some embodiments, the number, interval distance and specific arrangement direction of the shunt plate 15 can be selected according to actual needs, and the embodiments of the present application do not limit this.

[0084] Optionally, the third plate body 43 has a third end 17 and a fourth end 18 oppositely arranged along the first direction X, and the third end 17 faces the first plate body 41; the flow passage cross-sectional area of the shunt cavity 12 gradually increases from the fourth end 18 to the third end 17.

[0085] In the embodiments of the present application, the flow passage cross-sectional area of the shunt cavity 12 gradually increases from the fourth end 18 to the third end 17, so as to increase the flow of the cooling medium at the fourth end 18 in the process of the cooling medium being shunted from the fourth end 18 to the third end 17, so as to make the cooling medium have sufficient flow to flow into the first flow channels 1, and then make the flow of each first flow channel 1 uniform.

[0086] It should be noted that the flow passage cross-sectional area of the shunt cavity 12 is the cross-sectional area of the shunt cavity 12 perpendicular to the first direction X.

[0087] Optionally, Figures 1-9 As shown in the third plate body 43 is provided with an outlet 11 away from the first plate body 41 and the second plate body 42; the third plate body 43 is provided with a converging cavity 13 in communication with the outlet 11, and the converging cavity 13 is in communication with a plurality of second flow channels 2.

[0088] In the embodiment of the present application, the third plate body 43 is further provided with an outlet 11 on the side away from the first plate body 41 and the second plate body 42; the plate body 4 is provided with a converging cavity 13 communicating with the outlet 11, and the converging cavity 13 communicates with the plurality of second flow channels 2. In this way, the cooling medium can be converged through the converging cavity 13, so as to improve the uniformity of the cooling medium convergence. Meanwhile, in cooperation with the structure that the first plate body 41 and the second plate body 42 are stacked up and down, the effect of one-side inlet and outlet of the cooling medium is realized, the structural size of the cooling assembly is reduced, and the problem of large cooling plate area or volume caused by the two-side inlet and outlet, upper inlet and upper outlet and other modes of the cooling medium in the prior art is solved.

[0089] In still some embodiments, the converging cavity 13 and the diverging cavity 12 can be arranged up and down along the third direction Z of the third plate body 43, or can be arranged left and right along the second direction Y of the third plate body 43, which is not limited in the embodiment of the present application.

[0090] Optionally, as shown in Figure 9 , the converging cavity 13 is provided with at least one converging plate 16; the at least one converging plate 16 separates the converging cavity 13 into a plurality of sub-converging cavities, and the sub-converging cavities communicate with the second flow channels 2.

[0091] In the embodiment of the present application, by providing the converging plate 16 in the converging cavity 13, the converging plate 16 separates the converging cavity 13 into a plurality of sub-converging cavities, and the sub-converging cavities communicate with the second flow channels 2, so that when the cooling medium enters the converging cavity 13, it can enter the plurality of sub-converging cavities uniformly through the converging plate 16, and then flow out uniformly from the outlet 11 of the plate body 4.

[0092]

[0093] In some embodiments, the number, interval distance and specific arrangement direction of the converging plate 16 can be selected according to actual needs, which is not limited in the embodiment of the present application.

[0094] Optionally, as shown in Figure 7 and Figure 8 , the third plate body 43 has a third end 17 and a fourth end 18 oppositely arranged along the first direction X, and the third end 17 faces the first plate body 41; the flow passage cross-sectional area of the converging cavity 13 gradually decreases from the third end 17 to the fourth end 18.

[0095] In the embodiment of the present application, by gradually reducing the flow passage cross-sectional area of the converging cavity 13 from the third end 17 to the fourth end 18, so as to increase the flow rate of the cooling medium at the fourth end 18 in the process of converging from the third end 17 to the fourth end 18, to enhance the disturbance of the cooling medium, and further improve the heat dissipation capacity of the cooling medium.

[0096] ​It should be noted that the flow area of the flow cavity 13 is the cross-sectional area of the flow cavity 13 along the first direction X.

[0097] Optionally, as shown in Figures 1-9 , the second plate body 42 is provided with a plurality of fourth flow channels 14 on one side close to the third plate body 43; the extension direction of the third flow channel 3 is the second direction Y, and the plurality of fourth flow channels 14 are arranged at intervals along the second direction Y, each fourth flow channel 14 corresponds to a second flow channel 2, one end of the fourth flow channel 14 communicates with the second flow channel 2, and the other end of the fourth flow channel 14 communicates with the flow cavity 13.

[0098] In the embodiment of the present application, one end of the fourth flow channel 14 communicates with the second flow channel 2, and the other end of the fourth flow channel 14 communicates with the flow cavity 13. In this way, the cooling medium flows out from the extension direction of the second plate body 42, and at the same time, the structure of the flow cavity 13 and the flow cavity 12 in the third plate body 43 is stacked, so that the effect of one-sided entry and exit of the cooling medium is realized, and the structural size of the cooling assembly in the third direction Z is reduced.

[0099] In some embodiments, as shown in Figure 3 , Figure 4 and Figure 9 , the fourth flow channel 14 has two first holes and second holes that communicate with each other, the first hole is connected with the second flow channel 2, the second hole is connected with the flow cavity 13, the cooling medium flows into the first hole from the second flow channel 2, flows out of the second hole and flows into the flow cavity 13, and finally flows out of the outlet 11. Since the first hole and the second hole have a height difference in the third direction Z,

[0100] The cooling medium forms a jet impact in the fourth flow channel 14 to increase the turbulence of the cooling medium in the fourth flow channel 14 and improve the heat dissipation efficiency.

[0101] Optionally, as shown in Figures 1-9 , the first plate body 41 and the second plate body 42 are stacked in the third direction Z, and the flow cavity 13 and the flow cavity 12 are arranged at intervals along the third direction Z.

[0102] In the embodiment of the present application, the flow cavity 13 and the flow cavity 12 are arranged at intervals along the third direction Z, so that the size of the third plate body 43 in the third direction Z is reduced, and the space of the flow cavity 13 and the flow cavity 12 is increased, so as to improve the uniformity of the cooling medium when it flows, and further improve the uniformity of heat dissipation of the cooling assembly.

[0103] Optionally, as shown in Figures 1-10 , the cooling assembly further comprises a pipe 19 and an adjusting member 20; one end of the pipe 19 is connected with the inlet 10, the other end of the pipe 19 is used to be connected with an external liquid supply device, and the adjusting member 20 is arranged in the pipe 19 and used to adjust the flow rate of the cooling medium.

[0104] In this embodiment, the regulating element 20 is disposed in the pipe 19, one end of the pipe 19 is connected to the inlet 10, and the other end of the pipe 19 is connected to an external liquid supply device. In this way, the flow rate of the cooling medium in the pipe 19 is adjusted by the regulating element 20 to enhance the turbulence of the cooling medium at the inlet 10, which is beneficial to thinning the thermal boundary layer of the cooling medium, enhancing the heat transfer of the cooling medium, and improving the problem of thick thermal boundary layer and poor heat exchange caused by traditional uniform flow.

[0105] In some embodiments, such as Figure 11 As shown, the flow velocity of the cooling medium in pipe 19 is characterized by a velocity profile. The velocity profile of pipe 19 includes periodic velocity profiles and non-periodic velocity profiles; the periodic velocity profile may include a sine curve, a cosine curve, or other curves, which are not limited in this embodiment.

[0106] Furthermore, the periodic flow velocity curve can be controlled by the regulating element 20, which can be a programmable regulating device. The periodic flow velocity curve can be realized by setting the corresponding program.

[0107] Optionally, the regulating component 20 includes a valve and a controller; the valve is located in the pipeline 19, and the controller is electrically connected to the valve. The controller is used to control the operation of the valve to regulate the flow rate of the cooling medium.

[0108] In this embodiment of the application, by placing the valve in the pipe 19 and electrically connecting the controller to the valve, the controller can control the operation of the valve to regulate the flow rate of the cooling medium entering the pipe 19, thereby enhancing the turbulence of the cooling medium.

[0109] In some embodiments, the controller includes programmable software that controls the size of the valve to control the flow rate of the cooling medium.

[0110] Secondly, embodiments of this application also propose a battery pack including a cooling component as described in any of the above embodiments.

[0111] In this embodiment, multiple first flow channels 1, multiple second flow channels 2, and multiple spaced third flow channels 3 are arranged within the plate 4. The first flow channels 1 are connected to the inlet 10 in the plate 4, the second flow channels 2 are connected to the outlet 11 in the plate 4, and the third flow channels 3 are connected to the first flow channels 1 and the second flow channels 2. Thus, multiple cooling channels can be formed by connecting the first flow channels 1 and the second flow channels 2 through the third flow channels 3. The cooling medium in each cooling channel can form a flow loop, increasing the uniformity of cooling medium distribution at different locations in the plate, thereby improving the uniformity of heat dissipation. Simultaneously, this application adopts a simultaneous flow and flow diversion technique to avoid the problem of high flow resistance caused by a long flow path of the cooling medium.

[0112] In some embodiments, the cooling assembly can be flexibly arranged according to the heat dissipation of the battery pack. For example, if the heat source of the battery pack is mainly concentrated on the upper surface of the battery pack, the second plate body 42 can be arranged on the upper surface of the battery pack; if the heat source of the battery pack is mainly concentrated on the lower surface of the battery pack, the second plate body 42 can be arranged on the lower surface of the battery pack. In this way, the cooling assembly can be flexibly arranged according to the position of the heat source of the battery pack, so as to better adapt to the existing power battery pack structure.

[0113] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0114] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A cooling assembly, characterized in that, The plate body (4) comprises: The plate body (4) is provided with a plurality of first flow channels (1) and a plurality of second flow channels (2), the first flow channels (1) are communicated with the inlet (10) in the plate body (4), and the second flow channels (2) are communicated with the outlet (11) in the plate body (4); The plate body (4) is further provided with a plurality of third flow channels (3) arranged at intervals, the extension directions of the third flow channels (3) are respectively intersected with the extension directions of the first flow channels (1) and the second flow channels (2), and the third flow channels (3) communicate the first flow channels (1) and the second flow channels (2) to form cooling channels for flowing cooling medium; The plate body (4) comprises a first plate body (41), a second plate body (42) and a third plate body (43), the third plate body (43) is connected with the first plate body (41) and the second plate body (42), one side of the third plate body (43) away from the first plate body (41) and the second plate body (42) is provided with the inlet (10), and the third plate body (43) is provided with a flow distribution cavity (12) communicated with the inlet (10) therein. The first flow channels (1) and the second flow channels (2) are alternately arranged at intervals.

2. Cooling assembly according to claim 1, characterized in that The extension directions of the first flow channels (1) and the second flow channels (2) are a first direction (X), the extension direction of the third flow channel (3) is a second direction (Y), the first flow channel (1) has a first center line along the first direction (X), the second flow channel (2) has a second center line along the first direction (X), and the third flow channel (3) has a third center line along the second direction (Y); 3. The cooling assembly of claim 1, wherein, The distance between the first center line and the third center line in a third direction (Z) is greater than zero, and / or the distance between the second center line and the third center line in the third direction (Z) is greater than zero, and the third direction (Z) is perpendicular to the first direction (X) and the second direction (Y). The first flow channel (1) has oppositely arranged first and second ends (5) and (6) along the first direction (X), the first end (5) is close to the inlet (10) in the plate body (4), and the flow area of the first flow channel (1) gradually increases from the first end (5) to the second end (6).

4. Cooling assembly according to claim 3, characterized in that The first plate body (41) and the second plate body (42) are stacked; the first flow channels (1) and the second flow channels (2) are arranged in the first plate body (41); and the third flow channels (3) are arranged in the second plate body (42).

5. The cooling assembly of claim 3, wherein, The first plate body (41) is provided with alternately arranged first and second grooves (7) and (8) on one side facing the second plate body (42), and the second plate body (42) covers the first and second grooves (7) and (8) to form the first and second flow channels (1) and (2), respectively.

6. Cooling assembly according to claim 5, characterized in that ​ And / or, one side of the second plate body (42) is provided with third grooves (9) arranged at intervals, and the first plate body (41) is arranged on the third grooves (9) to form the third flow channel (3).

7. The cooling assembly of claim 3, wherein, At least one flow distribution plate (15) is arranged in the flow distribution cavity (12), and the flow distribution cavity (12) is divided into a plurality of sub-flow distribution cavities (12) by the at least one flow distribution plate (15), and the sub-flow distribution cavities (12) are communicated with the first flow channel (1).

8. The cooling assembly of claim 3, wherein, The third plate body (43) has a third end (17) and a fourth end (18) arranged oppositely along the first direction (X), and the third end (17) faces the first plate body (41); the flow passage cross-sectional area of the flow distribution cavity (12) gradually increases from the fourth end (18) to the third end (17).

9. The cooling assembly of claim 3, wherein, The third plate body (43) is further provided with the outlet (11) on the side away from the first plate body (41) and the second plate body (42); the third plate body (43) is provided with a flow collection cavity (13) communicated with the outlet (11), and the flow collection cavity (13) is communicated with a plurality of second flow channels (2).

10. The cooling assembly according to claim 9, wherein, At least one flow collection plate (16) is arranged in the flow collection cavity (13), and the flow collection cavity (13) is divided into a plurality of sub-flow collection cavities (13) by the at least one flow collection plate (16), and the sub-flow collection cavities (13) are communicated with the second flow channels (2).

11. The cooling assembly of claim 9, wherein, The third plate body (43) has a third end (17) and a fourth end (18) arranged oppositely along the first direction (X), and the third end (17) faces the first plate body (41); the flow passage cross-sectional area of the flow collection cavity (13) gradually decreases from the third end (17) to the fourth end (18).

12. The cooling assembly of claim 9, wherein, The second plate body (42) is provided with a plurality of fourth flow channels (14) on the side close to the third plate body (43). The extension direction of the third flow channel (3) is a second direction (Y), and a plurality of fourth flow channels (14) are arranged at intervals along the second direction (Y), each fourth flow channel (14) corresponds to one second flow channel (2), one end of the fourth flow channel (14) is communicated with the second flow channel (2), and the other end of the fourth flow channel (14) is communicated with the flow collection cavity (13).

13. The cooling assembly of claim 9, wherein, The third direction (Z) is the direction in which the first plate body (41) and the second plate body (42) are stacked, and the flow collection cavity (13) and the flow distribution cavity (12) are arranged at intervals along the third direction (Z).

14. Cooling assembly according to any of claims 1-13, characterized in that The cooling assembly further comprises a pipeline (19) and an adjusting member (20). One end of the pipeline (19) is connected with the inlet (10), the other end of the pipeline (19) is used for being connected with an external liquid supply device, and the adjusting member (20) is arranged in the pipeline (19) and used for adjusting the flow rate of the cooling medium.

15. The cooling assembly of claim 14, wherein, The adjusting member (20) comprises a valve and a controller. The valve is arranged in the pipeline (19), the controller is electrically connected with the valve, and the controller is used for controlling operation of the valve to adjust the flow rate of the cooling medium.

16. A battery pack, characterized by The cooling assembly comprises the cooling assembly according to any one of claims 1-15.

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