Liquid cooling plate, liquid cooling system and battery module

Abstract

A liquid cooling plate (10) comprising a liquid cooling plate body (100) and a flow disturbance element (200); the liquid cooling plate body (100) extends along a first direction, and a side surface of the liquid cooling plate body (100) is a curved or a flat surface, wherein a side surface of the liquid cooling plate body (100) coincides with a side wall of a cell (20); within the liquid cooling plate body (100) several flow channels (110) are provided extending along the first direction, and in each of the several flow channels (110) the flow disturbance element (200) is provided; wherein the flow disturbance element (200) has a single helical structure and extends along the first direction.

Description

TECHNICAL FIELDThe present application relates to the field of battery technologies, and more particularly to a liquid cooling plate, a liquid cooling system, and a battery module.BACKGROUNDThe serpentine liquid cooling plate is in contact with the side surface of the cell for heat exchange, and offers advantages of high heat dissipation efficiency, large heat exchange area, low pressure drop, good heat insulation effect, and high structural strength. It becomes the main component of the liquid cooling plate for a power battery. Currently, a flow channel in a serpentine liquid cooling plate is usually made up of a plurality of square regular cavities. A cooling liquid is distributed into the plurality of cavities through a water inlet header, flows in the flow channel, and forms a convective heat exchange with a cell, finally merges in the water outlet header, and flows out of a liquid outlet.TECHNICAL PROBLEMSince the flow rate of the cooling liquid at the liquid inlet is relatively large, it is difficult to form a turbulent flow in the flow channel. At the same time, the heat exchange area in the cavity is limited, so that the heat conduction area inside the serpentine liquid cooling plate is relatively small, resulting in low heat exchange efficiency of the liquid cooling plate.SUMMARYThe present application relates to a liquid cooling plate comprising a liquid cooling plate body and a flow disturbing element, wherein the liquid cooling plate body extends along a first direction, a side surface of the liquid cooling plate body is a curved or flat surface, the side surface of the liquid cooling plate body corresponds to a side wall of a cell, a plurality of flow channels running along a first direction are provided inside the liquid cooling plate body, and the flow disturbing element is provided in the flow channels.The flow disturbing element has a single helical structure and extends along the first direction.The present application further relates to a liquid cooling system comprising a liquid collector and a liquid cooling plate as described above, wherein a flow channel is provided inside the liquid cooling plate, and the flow channel has a liquid inlet end and a liquid outlet end; the collector comprises a liquid inlet collector and a liquid outlet collector, wherein the liquid inlet collector communicates with the liquid inlet end and the liquid outlet collector communicates with the liquid outlet end.The liquid cooling plate extends in a first direction, the liquid cooling plate has two opposite ends in the first direction, and the liquid inlet end, the liquid outlet end, the liquid inlet collector, and the liquid outlet collector are located at a same end of the liquid cooling plate.The present application also provides a battery module including the above-mentioned liquid cooling system.ADVANTAGEOUS EFFECTThe present application provides a liquid cooling plate. By disposing a flow disturbing member in a flow channel of the liquid cooling plate, since the flow disturbing member is a single spiral structure and a spiral extending direction of the single spiral structure coincides with an extending direction of the flow channel, a relatively strong turbulent flow is formed by the single spiral structure after cooling liquid enters the flow channel, thereby increasing the heat exchange efficiency of a liquid cooling pipe.The present application also relates to a liquid cooling system. A liquid inlet end, a liquid outlet end, a liquid inlet collector and a liquid outlet collector of the liquid cooling plate are arranged at the same end of the liquid cooling plate, so that on the one hand the concentration and quick connection of the liquid inlet end and the liquid inlet collector or container and of the liquid outlet end and the liquid outlet collector or container is convenient.The present invention also relates to a battery module. The collectors and the connecting lines are arranged on the same side of the liquid cooling plate, so that the space occupied by the liquid cooling in the battery module is saved.BRIEF DESCRIPTION OF THE DRAWINGSFIG. 1 is a schematic structural diagram of a liquid cooling plate according to embodiments of the present application. FIG. 2 is a schematic structural diagram of a liquid cooling plate interacting with a cell according to embodiments of the present application. FIG. 3 is a partial schematic structural diagram of a liquid cooling plate according to embodiments of the present application. FIG. 4 is a schematic enlarged view of a position A of a liquid cooling plate according to the embodiment shown in FIG. 3. FIG. 5 is a schematic structural diagram of a flow perturbation member of a cold liquid cooling plate according to embodiments of the present application. FIG. 6 is a schematic structural diagram of a liquid cooling system according to embodiments of the present application. FIG. 7 is a schematic structural diagram of a liquid cooling plate of a liquid cooling system according to embodiments of the present application. FIG. 8 is a schematic illustration of a flow collection structure of a liquid cooling system according to embodiments of the present application. FIG. 9 is a schematic structural diagram of a battery module according to embodiments of the present application.EMBODIMENTSIn the description of the present application, the terms "connected", "connected", and "fixed" are to be understood in the broadest sense, unless otherwise specified or limited, e.g., fixed connections, detachable connections, or integral connections; and may also be mechanical or electrical connections; they may also be direct connections or indirect connections via intervening structures; they may also be internal communications of two elements or interaction relationships between two elements. The specific meanings of the above terms in the present application can be understood by those skilled in the art depending on specific situations.In the present application, unless otherwise stated or limited, a structure in which a first feature is "above" or "below" a second feature may include an embodiment in which the first feature is in direct contact with the second feature, and may also include an embodiment in which the first feature and the second feature are not in direct contact with each other but are in contact via another feature formed therebetween. Moreover, a first feature "on", "over" or "on" a second feature includes an embodiment in which the first feature is directly or obliquely "on", "over" or "on" the second feature and the first feature is at a higher height than the second feature. The first feature "below", "below" and "on the bottom side" of the second feature includes the first feature "directly below" and "diagonally below" the second feature, and the first feature is horizontally lower than the second feature.In the description of this embodiment, orientation or positional relationships of terms such as "upper", "lower", "left", "right", "front" and "rear" are based on orientation or positional relationships illustrated in the drawings and used for convenience of description and operation, but do not indicate or imply that a stated device or element has a particular orientation or must be constructed and operated in a particular orientation, and therefore cannot be construed as limitations of this application. Moreover, the terms "first" and "second" are used for distinction in the specification and have no particular meaning.Referring to FIGS. 1 to 5, embodiments of the present application provide a liquid cooling plate 10, wherein the liquid cooling plate 10 includes a liquid cooling plate body 100 and a flow disturbing member 200. The liquid cooling plate body 100 extends along a first direction, a side surface 101 of the liquid cooling plate body 100 is a curved surface or a flat surface, and the side surface of the liquid cooling plate body 100 corresponds to a side wall of a cell 20. The flow disturbing element 200 has a single spiral structure and extends in the first direction.As shown in FIGS. 1 to 2, the liquid cooling plate 10 is a plate-shaped structure having a certain thickness, and is disposed between the cells 20 and contacts a side wall of the cell 20 to cool the cell 20.As shown in FIG. 1, the liquid cooling plate 10 includes a liquid cooling plate body 100. The liquid cooling plate body 100 extends along a first direction (i.e., an X direction in the figure). The body of the liquid cooling plate has two opposite side surfaces 101, and the shape of the side surfaces 101 corresponds to the shape of the side wall of the cell 20 to increase the contact area between the liquid cooling plate 10 and the cell 20 and thereby increase the heat exchange efficiency therebetween.In a case where the cell 20 is a cylindrical cell, the side surface 101 is a curved surface, and the liquid cooling plate 10 is a liquid cooling plate having a curved surface. As shown in FIG. 2, the side surface 101 of the liquid cooling plate body 100 is a wavy concave-convex curved surface extending along a first direction, the concave-convex curved surface including a concave portion and a convex portion, and the curvature of the concave portion and the convex portion corresponds to the diameter of the cell 20. In a case where the liquid cooling plate 10 is disposed between the cells 20, the concave portion near the side surface 101 of one side of the cell 20 is fixed to the side wall of the cylindrical cell, and the protruding portion is located between adjacent cells 20, which increases the contact area between the side surface 101 of the liquid cooling plate body and the side wall of the cell 20. The increase in the contact area facilitates heat conduction of the cell 20 so that the heat conduction rate thereof is higher and the temperature compensation performance is better, thereby improving the heat exchange efficiency of the liquid cooling plate 10.In a case where the cell 20 is a square cell or a softpack cell, the side surface 101 is a plane and the liquid cooling plate 10 is a planar liquid cooling plate. In a case where the liquid cooling plate 10 is disposed between the cells 20, the planar side surface 101 is attached to the side wall of the planar cell to perform heat exchange and thereby cool the cells 20.As shown in FIG. 3, the flow channel 110 is a hollow channel disposed inside the liquid cooling plate 10, the channel extending in a first direction (i.e., an X direction in the figure). The flow channel 110 includes a liquid inlet port and a liquid outlet port, the cooling liquid enters the channel through the liquid inlet port and is discharged to the liquid cooling plate 10 through the liquid outlet port. The cooling liquid flowing through the flow channel 110 exchanges heat with the cell 20 to cool the cell 20.In some embodiments, a shape of the flow channel 110 matches a shape of a side surface of the liquid cooling plate body 100. In a case where the side surface 101 of the liquid cooling plate body 100 is a curved surface, the flow channel 110 is arranged in a curve shape along a first direction, and the curved flow channel contributes to enhancing a flow disturbance effect of the cooling liquid in the flow channel, so as to improve the liquid cooling efficiency of the liquid cooling plate 10. In a case where the side surface 101 of the liquid cooling plate body 100 is a flat surface, the flow channel 110 is arranged in a rectilinear shape along the first direction.As shown in FIGS. 3 to 4, the flow disturbing member 200 has a long strip shape and a single spiral structure, and the extending direction of the flow disturbing member 200 coincides with the extending direction of the flow channel 110. The flow disturbing member 200 is disposed between the inner wall of the flow channel 110 and the inner wall of the flow channel 110 to form a single spiral channel, and the cooling liquid flows in the single spiral channel. Since the cooling liquid used by the battery liquid cooling plate 10 is generally a low viscosity liquid such as water, the single spiral channel used in the present application is more suitable for transporting the cooling liquid of the battery as compared to a double spiral channel structure, and the single spiral channel has a simple structure and lower manufacturing cost. The cooling liquid flows more quickly in the single spiral channel, has a higher heat exchange efficiency, and is not so easily blocked.In some embodiments, a shape of the flow perturbation member 200 matches a shape of the flow channel 110. In a case where the side surface 101 of the liquid cooling plate body 100 is a curved surface, the flow disturbing member 200 is arranged in a curved shape along the first direction, so that on the one hand the degree of matching with the shape of the flow channel is improved and on the other hand the flow disturbing effect is enhanced and the liquid cooling efficiency of the liquid cooling plate 10 is improved. In a case where the side surface 101 of the liquid cooling plate body 100 is a flat surface, the flow disturbing member 200 is linearly arranged along the first direction.In the present application, a flow disturbing element having a single spiral structure is additionally provided in the flow channel of the liquid cooling plate 10 in order to enhance the flow disturbing effect on the cooling liquid flowing through the flow channel, to increase the contact area between the cooling liquid and the flow disturbing element, and to improve the heat exchanging efficiency of the cooling liquid.In some embodiments, as shown in FIG. 5, the flow disturbing member 200 comprises a helical blade 210, the helical blade 210 is provided with through holes 220, and the through holes 220 penetrate the helical blade 210 in a first direction.As shown in FIG. 5, the flow disturbing member 200 is formed by helical blades and is configured as a helical blade structure, so that the contact area between the cooling liquid and the blade surface is increased, thereby improving the flow disturbing effect and the heat exchanging efficiency.After the flow disturbing element 200 is added in the flow channel 110, the flow resistance for the cooling liquid correspondingly increases and the pressure of the entire liquid cooling system increases. In the present application, in order to ensure that the pressure drop of the entire liquid cooling system meets the requirements, a through hole 220 is provided on the spiral blade 210 of the flow disturbing element 200, which through hole passes through the spiral blade 210 and through which a part of the cooling liquid flows, whereby the flow resistance of the cooling liquid in the flow channel 110 can be effectively reduced. Moreover, the through holes 220 can also increase the flow disturbance effect and improve the heat exchange efficiency.In some embodiments, the flow disturbing member 200 is provided with a plurality of through holes 220, and the plurality of through holes 220 is evenly distributed on the spiral sheet 210 to ensure uniformity of heat exchange.In some embodiments, the cross section of the through hole 220 has a regular shape, for example, a circle or a square, and may also have an irregular shape, which is not limited herein.In some embodiments, the distances between adjacent spiral blades 210 of the flow perturbation member 200 may be set to be equal to each other to facilitate the manufacture of the flow perturbation member 200, simplify a manufacturing process of the flow perturbation member 200, and increase the universality of the flow perturbation member 200.After the cooling liquid has flowed from the liquid inlet port into the flow channel 110, the cooling liquid exchanges heat with the cell 20 to increase the temperature of the cooling liquid. Therefore, in the flow channel 110, the temperature of the cooling liquid near the liquid inlet port along the flow direction of the cooling liquid is higher than the temperature of the cooling liquid near the liquid outlet port, so that the heat exchange capacity of the front portion (the part near the liquid inlet port) and the heat exchange capacity of the rear portion (the part near the liquid outlet port) of the liquid cooling plate 10 are inconsistent. As a result, the liquid cooling plate 10 has non-uniform heat exchange. Therefore, the present application ensures uniform heat exchange over the distance between the spiral blades 210 of the flow perturbation member 200.In some embodiments, the distances between adjacent helical blades 210 near the liquid inlet port are greater than the distances between adjacent helical blades 210 near the liquid outlet port. Specifically, by taking the center of the flow disturbing element 200 in the first direction as a boundary, the distances between all the adjacent spiral blades 210 from the end of the flow disturbing element 200 near the liquid inlet port to the center are set to "a", and the distances between all the adjacent spiral blades 210 from the center to the end of the flow disturbing element 200 near the liquid outlet port are set to "b", where "a" is smaller than "b". By making the spiral density of the rear half portion (from the center to the end of the flow disturbing element 200 near the liquid inlet port) of the flow disturbing element 200 larger than the spiral density of the front half portion (from the end of the flow disturbing element 200 near the liquid inlet port to the center) of the flow disturbing element 200 to increase the contact area between the cooling liquid in the second half portion and the spiral blades 210, the heat exchange between the cooling liquid and the spiral blades 210 is improved so as to balance the heat exchange capacity of the front portion and the rear portion of the liquid cooling plate 10, whereby the cooling liquid flowing through the liquid cooling plate 10 can uniformly exchange heat with the cell 20.In some embodiments, in a direction from the liquid inlet port to the liquid outlet port, i.e., in the direction in which the cooling liquid flows, the distances between adjacent spiral blades 210 of the flow perturbation member 200 sequentially decrease. In a case where the temperature of the cooling liquid flowing through the flow channel 110 gradually increases along with the heat exchange with the cell 20, the heat exchange capacity of the liquid cooling plate 10 is effectively balanced and the uniformity of the heat exchange is ensured by successively decreasing the distances between adjacent spiral blades 210 of the flow disturbing member 200.In some embodiments, as shown in FIG. 4, a side surface of the flow channel 110 facing the flow disturbing member 200 is provided with a convex structure 111.Specifically, the protruding structure 111 is a semicircular or rectangular protruding structure, which is not limited herein. A plurality of protruding structures 111 are spaced and evenly distributed on an inner wall of the flow channel 110. By providing the protruding structures 111 in the flow channel 110, a turbulent effect of the cooling liquid flowing through the flow channel 110 is promoted, thereby improving the heat exchange efficiency of the liquid cooling plate 10.In some embodiments, as shown in FIGS. 3-4, the cross-section of the flow channel 110 is circular. The inner flow channel 110 of the liquid cooling plate 10 is formed by a plurality of circular channels. On the one hand, the circular channels may improve the overall structural strength of the liquid cooling plate 10 and ensure the uniform heat exchange of the cell 20. On the other hand, the circular channel may better match the flow disturbing member 200 with a spiral structure, and the edge of the spiral blade 210 of the flow disturbing member 200 may be more easily matched with the inner wall of the circular channel, so that a spiral channel is formed in the flow channel 110, which helps to improve the heat exchange efficiency of the liquid cooling plate 10.In some embodiments, as shown in FIG. 1, a plurality of flow channels 110 penetrate the liquid cooling plate body 100, and the plurality of flow channels 110 are arranged in parallel in a second direction, the second direction being perpendicular to the first direction.Specifically, all the flow channels 110 extend in the first direction, all the flow channels 110 penetrate the liquid cooling plate body 100 in the first direction, and all the flow channels 110 are arranged in the second direction (i.e., a Y direction in the figure) in parallel at intervals to form a parallel arrangement. In a first direction, the liquid cooling plate 10 includes a first end surface 102 and a second end surface that are opposed to each other as shown in FIG. 3. A plurality of liquid inlet ports are arranged along a second direction (i.e., a Y direction in the figure), and the plurality of liquid inlet ports respectively communicate with corresponding flow channels 110. On the second end surface of the liquid cooling plate 10, a plurality of liquid discharge ports are arranged along a second direction (i.e., a direction Y in the figure), the liquid discharge ports communicate with the corresponding flow channels 110. In the cooling operation of the cell 20 by the liquid cooling plate 10, the cooling liquid is distributed to the plurality of liquid inlet ports through the liquid inlet collector and supplied to the corresponding flow channel 110. The cooling liquid flows in the flow channel 110 and forms a convective heat exchange with the cell 20, and finally flows out of the liquid outlet ports and is merged in the liquid outlet manifold. In the present application, the plurality of flow channels 110 are arranged in parallel to cool a cell 20, such that the cooling effect is more uniform and the heat exchange efficiency is higher.Note that the flow channels 110 in the liquid cooling plate 10 may also be arranged in series or in a combination of series connection and parallel connection, which is not limited herein.The present application relates to a liquid cooling plate. A flow disturbing element is arranged in a flow channel of the liquid cooling plate. The flow disturbing member has a single spiral structure, and a spiral extending direction of the single spiral structure is the same as an extending direction of the flow channel. After entering the flow channel, a cooling liquid forms a large flow disturbance due to the single spiral structure, thereby increasing the heat exchange efficiency of a liquid cooling pipe.As shown in FIGS. 6 to 8, these are schematic structural diagrams of a liquid cooling system provided in the present application. The liquid cooling system includes a liquid cooling plate 10 and a collector 2001.A flow channel is provided inside the liquid cooling plate 10, and the flow channel includes a liquid inlet end and a liquid outlet end.The header 2001 includes a liquid inlet header 2101 and a liquid outlet header 2201, wherein the liquid inlet header 2101 communicates with a liquid inlet end, and the liquid outlet header 2201 communicates with a liquid outlet end;The liquid cooling plate 10 extends in a first direction, the liquid cooling plate 10 includes two opposite ends in the first direction, and a liquid inlet end, a liquid outlet end, a liquid inlet collector 2101, and a liquid outlet collector 2201 are located at the same end of the liquid cooling plate 10.Specifically, the liquid cooling plate 10 is a plate-shaped structure having a certain thickness, and a channel, i.e., a flow channel, through which a cooling liquid circulates is provided inside the liquid cooling plate 10. The liquid cooling plate 10 is disposed on at least one side of the cell, and a side surface of the liquid cooling plate 10 is in contact with a side wall of the cell. The cooling liquid flowing in the flow channel exchanges heat with the cell to cool and cool the cell, thereby improving the life of the cell.The header 2001 functions to provide cooling liquid to the liquid cooling plate 10. The cooling liquid flows through the flow channel and exchanges heat with the cell. After the heat exchange, the temperature of the cooling liquid rises and is then discharged through the liquid outlet end of the flow channel and collected in the liquid outlet collector 2201 to complete the cooling of the cell.In some embodiments, as shown in FIG. 7, the liquid cooling plate 10 includes, along a first direction (i.e., an X direction), a first end 101 and a second end 102 that are opposite to each other. Both a liquid inlet end and a liquid outlet end of the flow channel are located at the first end 101, the liquid inlet collector 2101 is located on a side near the first end 101 and communicates with the liquid inlet end, and the liquid outlet collector 2201 is located on a side near the first end 101 and communicates with the liquid outlet end.In the present application, the liquid inlet end, the liquid outlet end, the liquid inlet header 2101, and the liquid outlet header 2201 of the liquid cooling plate 10 are disposed at the same end of the liquid cooling plate 10 so that, on the one hand, the liquid inlet end and the liquid inlet header 2101 are disposed close to each other, and the liquid outlet end and the liquid outlet header 2201 are disposed close to each other to enable quick connection, and, on the other hand, the header 2001 and the connection pipe are disposed on the same side of the liquid cooling plate 10 so that the space occupied by the liquid cooling system in the battery module is saved.In some embodiments, as shown in FIGS. 6 to 8, in order to facilitate the connection between the liquid inlet end and the liquid inlet collector 2101 and the connection between the liquid outlet end and the liquid outlet collector 2201, a liquid inlet port 110 is provided at a liquid inlet end, a liquid outlet port 120 is provided at a liquid outlet end, a liquid inlet port 230 is provided at a liquid inlet collector 2101, and a liquid outlet port 240 is provided at the liquid outlet collector 2201. The liquid inlet port 110 is connected to the liquid inlet port 230, and the liquid outlet port 120 is connected to the liquid outlet port 240. Thus, the liquid inlet end communicates with the liquid inlet collector 2101, and the liquid outlet end communicates with the liquid outlet collector 2201.In some embodiments, the liquid inlet port 110 is plug-connected to the liquid inlet port 230 and the liquid outlet port 120 is plug-connected to the liquid outlet port 240 to enable quick connection between the header 2001 and the liquid cooling plate 10.For example, as shown in FIG. 7, the liquid inlet port 110 and the liquid outlet port 120 of the liquid cooling plate 10 are bushings, the bushings include an insertion hole 1111, and an outer periphery of the bushing is provided with a convex protrusion 112. As shown in FIG. 3, the liquid inlet port 230 and the liquid outlet port 240 of the header 2001 are quick connectors, and an outer diameter of the quick connector corresponds to an inner diameter of the insertion hole 1111, so that in a case where the quick connector is inserted into the insertion hole 1111, it is inserted into the insertion hole 1111, the quick connector is inserted into the insertion hole 1111. The outer periphery of the quick connector is provided with a convex portion 241, and an inner wall of the insertion hole 1111 is provided with a concave portion that matches the convex portion so that when inserted, the socket is connected and fixed to the quick connector; the quick connector is also provided with a buckle 250. A side of the buckle 250 facing the quick connector is provided with a groove 251 that fits the convex nose 112 so that when inserted, the convex nose 112 is embedded in the groove 251. The socket and the quick connector are locked, dropping is prevented, and reliability of connection between the liquid cooling plate 10 and the header 2001 is improved.Note that connection structures of the liquid inlet port 110 and the liquid inlet connector 230 and connection structures of the liquid outlet port 120 and the liquid outlet connector 240 are not limited to the specific structures in the foregoing embodiments, and other forms of connector structures are also allowed. The connection mode between the liquid inlet port 110 and the liquid inlet connector 230 and the connection mode between the liquid outlet port 120 and the liquid outlet connector 240 are not limited to the foregoing connection modes, and may be other connection modes not particularly limited here.In some embodiments, as shown in FIG. 6, the liquid inlet port 110, the liquid outlet port 120, the liquid inlet port 230, and the liquid outlet port 240 all extend along a second direction perpendicular to the first direction, the liquid inlet port 110 is connected to the liquid inlet port 230 along the second direction, and the liquid outlet port 120 is connected to the liquid outlet port 240 along the second direction, to enable quick connection between the liquid cooling plate 10 and the header 2001, thereby effectively improving the mounting efficiency.As shown in FIG. 6, the insertion holes 1111 of the liquid inlet port 110 and the liquid outlet port 120 have the same opening direction and have the second direction (i.e., Z direction). The header 2001 extends along a third direction (i.e., a Y direction) perpendicular to both the first direction and the second direction, the liquid inlet port 230 and the liquid outlet port 240 are connected to the header 2001 via a short pipe, and the short pipe extends perpendicular to the header 2001 (i.e., extends along the Z direction). In a case where the header 2001 is connected to the liquid cooling plate 10, the liquid inlet port 230 is inserted into the insertion hole 1111 of the liquid inlet port 110 in the Z direction, and the liquid outlet port 240 is inserted into the insertion hole 1111 of the liquid outlet port 120 in the Z direction, so that the liquid inlet header 2101 communicates with the liquid inlet port 110 and the liquid outlet header 2201 communicates with the liquid outlet port 120, which can effectively improve the connection efficiency.In some embodiments, as shown in FIG. 7, the liquid cooling plate 10 further includes a connection member 130, wherein the connection member 130 is connected to one end of the liquid cooling plate 10, and the liquid inlet port 110 and the liquid outlet port 120 are disposed on two opposite sides of the connection member 130. A plurality of channels are provided in the connector 130, and the plurality of channels are configured to connect the liquid inlet port 110 and the flow channel, and the liquid outlet port 120 and the flow channel.As shown in FIG. 7, the connector 130 extends along the first direction and has two opposite sides in the third direction, the two sides of the connector 130 are respectively provided with a first extension portion 131 and a second extension portion 132 that are perpendicular to the connector 130, the liquid inlet port 110 is provided on the first extension portion 131, and the liquid outlet port 120 is provided on the second extension portion 132, so that the opening direction of the insertion holes 1111 of the liquid inlet port 110 and the liquid outlet port 120 faces the second direction, so that it is practical if the liquid inlet port 110 and the liquid outlet port 120 dock on the collector 2001 in the second direction. A channel is provided inside the connecting member 130, the liquid inlet port 110 communicates with the first extension portion 131, and the first extension portion 131 communicates with the liquid inlet end of the channel via the channel. The liquid outlet port 120 communicates with the second extension portion 132, and the second extension portion 132 communicates with the liquid outlet end of the flow channel via the channel.An opening direction of the insertion holes 1111 of the liquid inlet port 110 and the liquid outlet port 120 is adjusted by the connector 130 so that the opening directions of the insertion holes 1111 all face a second direction so that the liquid inlet port 110 and the liquid outlet port 120 are connected in the second direction. At this time, the liquid inlet port 110 and the liquid outlet port 120 are disposed on two opposite sides of the connector 130, thereby avoiding interference between the liquid inlet port 230 and a connection pipe thereof and the liquid outlet port 240 and the connection pipe thereof during connection and impairing connection reliability.In some embodiments, the liquid inlet header 2101 and the liquid outlet header 2201 are integrally formed to improve integration of the header 2001, simplify the process, and save the space occupied by the header 2001.As shown in FIG. 8, the header 2001 includes a header body 201, the header body 201 extends in a third direction, a liquid inlet collecting passage and a liquid outlet collecting passage extending in the third direction are disposed inside the header body 201, a cooling liquid inlet 211 is disposed at an end of the liquid inlet collecting passage, and a cooling liquid outlet 221 is disposed at an end of the liquid outlet collecting passage. In the second direction, the collector body 201 includes two opposite sides, and one side of the collector body 201 is connected to the liquid inlet port 230 and the liquid outlet port 240, the liquid inlet port 230 is in communication with the liquid inlet collecting passage, and the liquid outlet port 240 is in communication with the liquid outlet collecting passage. The liquid inlet port 230 is connected to the header body 201 via a first short pipe 260, the liquid outlet port 240 is connected to the header body 201 via a second short pipe 270, and the lengths of the first short pipe 260 and the second short pipe 270 are different to avoid interference between the liquid inlet port 230 and the liquid outlet port 240 during installation, which would impair the reliability of the connection between the header body 2001 and the liquid cooling plate 10. The header body 201, the first short pipe 260, and the second short pipe 270 may also be formed integrally.In some embodiments, as shown in FIG. 6, the liquid cooling system includes a plurality of liquid cooling plates 10.As shown in FIG. 5, the liquid cooling system includes a plurality of liquid cooling plates 10. the plurality of liquid cooling plates 10 are arranged in parallel in a third direction, and the plurality of liquid cooling plates 10 are arranged in parallel. A liquid inlet port 110 and a liquid outlet port 120 of the liquid cooling plate 10 are both located at a first end 101 of the liquid cooling plate 10, the header 2001 is disposed near the first end 101 of the liquid cooling plate 10, a plurality of combinations of liquid inlet ports 230 and liquid outlet ports 240 are disposed side by side along a third direction on the header body 201, and a liquid inlet port 230 and a liquid outlet port 240 are connected to a liquid cooling plate 10, respectively. In the present application, a liquid cooling system is connected in parallel using a plurality of liquid cooling plates, which can effectively reduce the flow resistance of the entire liquid cooling system and improve the flow uniformity of the liquid cooling system.In some embodiments, as shown in FIGS. 6 to 7, the liquid cooling plate 10 includes an upper end 103 and a lower end 104 that are opposite to each other in the second direction, and the header 2001 overlaps the upper end 103 or the lower end 104. As shown in FIG. 6, a part of the header body 201 may overlap at the edge of the upper end 103 of the liquid cooling plate 10 located at the first end 101, so that the installation space in the second direction is meaningfully used, thereby reducing the space occupied by the liquid cooling system in the first direction, reducing the space occupied ratio of the liquid cooling system in the battery module or the battery pack, and at the same time reducing the cost of the liquid cooling system.In some embodiments, the flow channel is U-shaped, one end of the U-shaped flow channel is a liquid inlet end, and the other end of the U-shaped flow channel is a liquid outlet end.Specifically, a plurality of parallel flow channels are included in the liquid cooling plate 10 along a first direction, and the flow channels include a liquid inlet channel and a liquid outlet channel, the liquid inlet end of the liquid inlet channel and the liquid outlet end of the liquid outlet channel are both located at the first end 101 of the liquid cooling plate 10 and located at the second end 102 of the liquid cooling plate 10, the liquid inlet channel communicates with the liquid outlet channel to form a U-shaped flow channel, and the cooling liquid enters the U-shaped flow channel from the liquid inlet end of the first end 101 of the liquid cooling plate 10, the liquid crystal plate 10 being discharged from the liquid outlet end of the first end 101 after heat exchange with the cells. The flow channels in the liquid cooling plate 10 are configured as U-shaped flow channels, so that the liquid cooling plate 10 has better temperature uniformity and liquid cooling effect.In some embodiments, the liquid cooling plate 10 is undulating in a first direction.As shown in FIG. 5, the liquid cooling plate 10 has two opposite side surfaces along the third direction, and the two side surfaces of the liquid cooling plate 10 are formed as wave-shaped concave-convex curved surfaces. By arranging the side surface of the liquid cooling plate 10 as a wavy concave-convex curved surface, the concave portion of the liquid cooling plate 10 conforms to the side wall of the cell of the cylindrical battery module, and a convex portion of the liquid cooling plate 10 is located between adjacent cells, whereby the contact area between the side surface of the liquid cooling plate 10 and the side wall of the cell can be increased. The increase in the contact area facilitates the heat conduction of the cell, has a fast heat conduction rate and good temperature compensation performance, and facilitates the improvement in the heat exchange efficiency of the liquid cooling plate 10.The present application also provides a battery module including the above-mentioned liquid cooling system.As illustrated in FIG. 9, the battery module includes a cell group and a liquid cooling system.The cell group includes a plurality of cells 300, and the plurality of cells 300 are arranged in an array, wherein the cells 300 are cylindrical cells 300 or square cells 300, but are not limited thereto.The liquid cooling system includes a liquid cooling plate 10 and a collector 2001, a flow channel is provided inside the liquid cooling plate 10, and the flow channel includes a liquid inlet end and a liquid outlet end. The header 2001 includes a liquid inlet header 2101 and a liquid outlet header 2201, the liquid inlet header 2101 communicates with a liquid inlet end, and the liquid outlet header 2201 communicates with a liquid outlet end. The liquid cooling plate 10 extends in a first direction, the liquid cooling plate 10 includes two opposite ends in the first direction, and a liquid inlet end, a liquid outlet end, a liquid inlet collector 2101, and a liquid outlet collector 2201 are located at the same end of the liquid cooling plate 10.The liquid cooling plate 10 is located between two adjacent rows or two adjacent columns of cells 300, and a side surface of the liquid cooling plate 10 is in contact with a side wall of the cell 300, the cooling liquid is distributed by a liquid inlet collector 2101 and guided from a liquid inlet end into a plurality of flow channels, and the cooling liquid flows in the flow channels and forms a convective heat exchange with the cell 300, then the liquid cooling plate 10 is discharged from the liquid outlet end and finally collected in the liquid outlet collector 2201, so that the liquid cooling system cools the cells 300.In some embodiments, the battery module further includes a housing. The housing has a receiving cavity. The cell group, the liquid cooling system, the liquid inlet header, and the liquid outlet header are all accommodated in the accommodation cavity.The present application relates to a liquid cooling system and a battery module. A liquid inlet end, a liquid outlet end, a liquid inlet collector and a liquid outlet collector of a liquid cooling plate are arranged at the same end of the liquid cooling plate. On the one hand, the liquid inlet end can be conveniently connected to the liquid inlet collector and the liquid outlet end can be conveniently and concentratedly connected to the liquid outlet collector. On the other hand, the header and the connection pipe are disposed on the same side of the liquid cooling plate, so that the space occupied by the liquid cooling system in the battery module is saved.

Claims

A liquid cooling plate (10) comprising a liquid cooling plate body (100) and a flow disturbing member (200); the liquid cooling plate body (100) extends along a first direction, and a side surface of the liquid cooling plate body (100) is a curved or a flat surface, wherein a side surface of the liquid cooling plate body (100) coincides with a side wall of a cell (20); inside the liquid cooling plate body (100), a plurality of flow channels (110) are provided extending along the first direction, and in each of the plurality of flow channels (110), the flow disturbing member (200) is provided; wherein the flow disturbing member (200) has a single spiral structure and extends along the first direction.The liquid cooling plate (10) according to claim 1, wherein the flow disturbing member (200) comprises a plurality of spiral blades (210), the plurality of spiral blades (210) is provided with a plurality of through holes (220), and the plurality of through holes (220) penetrates the plurality of spiral blades (210) in the first direction.The liquid cooling plate (10) according to claim 2, wherein the flow disturbing member (200) is provided with a plurality of through holes (220), and the plurality of through holes (220) are evenly distributed on the spiral blades (210).The liquid cooling plate (10) according to claim 2 or 3, wherein the distances between adjacent spiral blades of the flow disturbing element (200) are equal.The liquid cooling plate (10) of any of claims 2-4, wherein the flow channel (110) comprises a liquid inlet opening (1101) and a liquid outlet opening (120), and wherein a distance between adjacent spiral blades (210) near the liquid inlet opening (1101) is greater than a distance between adjacent spiral blades (210) near the liquid outlet opening (120).The liquid cooling plate (10) according to any one of claims 2 - 5, wherein the flow channel (110) comprises a liquid inlet port and a liquid outlet port (1101), and wherein in a direction from the liquid inlet port (1101) to the liquid outlet port (120), the distances between adjacent spiral blades (210) of the flow disturbing element (200) sequentially decrease.The liquid cooling plate (10) according to any one of claims 1-6, wherein a side surface of the flow channel (110) facing the flow disturbing member (200) is provided with a convex structure.The liquid cooling plate (10) according to any one of claims 1-7, wherein a cross section of the flow channel (110) is circular.The liquid cooling plate (10) according to any one of claims 1-8, wherein the flow channel (110) passes through the liquid cooling plate body (100), and the plurality of flow channels (110) are arranged parallel to each other in a second direction, wherein the second direction is perpendicular to the first direction.A liquid cooling system, comprising: the liquid cooling plate (10) of any one of claims 1-9; a collector (2001); a flow channel (110) comprising a liquid inlet end and a liquid outlet end; the collector (2001) comprises a liquid inlet collector (2101) and a liquid outlet collector (2201), wherein the liquid inlet collector (2101) is connected to the liquid inlet end and the liquid outlet collector (2201) is connected to the liquid outlet end; the liquid cooling plate (10) extends in a first direction, the liquid cooling plate (10) comprises two opposite ends in the first direction, wherein the liquid inlet end, the liquid outlet end, the liquid inlet collector (2101) and the liquid outlet collector (2201) are located at a same end of the liquid cooling plate (10).The liquid cooling system according to claim 10, wherein the liquid inlet end is provided with a liquid inlet port (1101), and the liquid outlet end is provided with a liquid outlet port (120); the liquid inlet collector (2101) comprises a liquid inlet port, and the liquid outlet collector (2201) comprises a liquid outlet port; the liquid inlet port (1101) is plugably connected to the liquid inlet port, and the liquid outlet port (120) is plugably connected to the liquid outlet port.The liquid cooling system of claim 11, wherein the liquid inlet port (1101), the liquid outlet port (120), the liquid inlet port and the liquid outlet port all extend along a second direction that is perpendicular to the first direction, the liquid inlet port (1101) is connected to the liquid inlet port along the second direction, and the liquid outlet port (120) is connected to the liquid outlet port along the second direction.The liquid cooling system according to claim 12, wherein the liquid cooling plate (10) further comprises a connection member, the connection member is connected to one end of the liquid cooling plate (10), and the liquid inlet port and the liquid outlet port are disposed on two opposite sides of the connection member; a plurality of channels are provided in the connection member, and each of the plurality of channels is configured to connect the liquid inlet port to the flow channel (110) and connect the liquid outlet port to the flow channel (110).The liquid cooling system according to any one of claims 10-13, wherein the liquid inlet header (2101) and the liquid outlet header (2201) are integrally formed.The liquid cooling system according to claim 14, wherein the liquid cooling system comprises a plurality of liquid cooling plates (10), the plurality of liquid cooling plates (10) are arranged in parallel, and the plurality of liquid cooling plates (10) communicate with a collector (2001) to form a parallel structure.The liquid cooling system according to any one of claims 12-15, wherein the liquid cooling plate (10) has an upper end (103) and a lower end (104) that are opposite to each other along the second direction, and the header overlaps the upper end (103) or the lower end (104).The liquid cooling system according to any one of claims 10-16, wherein the flow channel (110) is U-shaped, one end of the U-shaped flow channel (110) is the liquid inlet end, and the other end of the U-shaped flow channel (110) is the liquid outlet end.The liquid cooling system according to any one of claims 10 - 17, wherein the liquid cooling plate (10) has a waveform along the first direction.A battery module comprising the liquid cooling system of any of claims 10-18.

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