Liquid cooling plate and battery module

Abstract

A liquid cooling plate and a battery module, the liquid cooling plate has a liquid inlet and a first flow channel and a second flow channel arranged at intervals, the inlet of the first flow channel and the inlet of the second flow channel are communicated with the liquid inlet; a first protrusion is arranged on the inner wall surface of the first flow channel, the first protrusion has a first blocking surface opposite to the flow direction of the medium in the first flow channel, a second protrusion is arranged on the inner wall surface of the second flow channel, the second protrusion has a second blocking surface opposite to the flow direction of the medium in the second flow channel; the first blocking surface has a first included angle a with the flow direction of the medium in the first flow channel, the second blocking surface has a second included angle b with the flow direction of the medium in the second flow channel, and a > b is satisfied. The flow of each area in the liquid cooling plate is close to uniform, and the heat dissipation effect of the liquid cooling plate is uniform.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a liquid cooling plate and a battery module. Background Technology

[0002] During operation, battery modules need to ensure that each cell maintains the same charging and discharging capacity. Excessive temperature differences within the module can affect its consistency, causing variations in the charging and discharging capabilities of different cells within the same module, thus impacting battery pack performance. For a single cell, the terminals and tabs located at the top generate more heat than other parts of the cell during operation. For the entire module, conductive aluminum busbars between cells also generate ohmic heat during operation, making the top of the battery module more prone to heat accumulation. Furthermore, the liquid cooling plate uses a straight-in / straight-out, multi-branch parallel arrangement. Due to gravity, the cooling medium preferentially flows through the lower pipes, resulting in uneven flow distribution between the top and bottom of the liquid cooling plate. Utility Model Content

[0003] The purpose of this invention is to provide a liquid cooling plate and a battery module to solve the problem of uneven flow distribution at the top and bottom of the liquid cooling plate.

[0004] To achieve the objectives of this utility model, the following technical solution is provided: In a first aspect, the present invention provides a liquid cooling plate having a liquid inlet and a first flow channel and a second flow channel spaced apart, wherein the inlet of the first flow channel and the inlet of the second flow channel are both connected to the liquid inlet; A first protrusion is provided on the inner wall surface of the first flow channel, and the first protrusion has a first blocking surface opposite to the flow direction of the medium in the first flow channel. A second protrusion is provided on the inner wall surface of the second flow channel, and the second protrusion has a second blocking surface opposite to the flow direction of the medium in the second flow channel. The first blocking surface and the flow direction of the medium in the first flow channel have a first angle α, and the second blocking surface and the flow direction of the medium in the second flow channel have a second angle β, satisfying that α > β.

[0005] In one implementation, 30° < a ≤ 150°, and 30° ≤ b < 150°.

[0006] In one embodiment, the height of the first protrusion protruding from the inner wall of the first flow channel is d1, and the height of the first flow channel is d2, satisfying: 0.25≤d1 / d2≤0.75.

[0007] In one embodiment, there are multiple first protrusions, and the multiple first protrusions are spaced apart along the flow direction of the medium in the first flow channel.

[0008] In one embodiment, a first groove is formed on the outer surface of the liquid cooling plate, and the first groove extends into the first protrusion.

[0009] In one embodiment, the liquid cooling plate includes a first plate and a second plate disposed opposite to each other, the first plate and the second plate enclosing to form the first flow channel and the second flow channel; The first protrusion is disposed on the surface of the first plate facing the second plate, and / or the first protrusion is disposed on the surface of the second plate facing the first plate; The second protrusion is disposed on the surface of the first plate facing the second plate, and / or the second protrusion is disposed on the surface of the second plate facing the first plate.

[0010] In one embodiment, the liquid cooling plate further has a liquid inlet channel, one end of which is connected to the liquid inlet, and the other end of which is connected to both the first channel and the second channel, and the liquid inlet channel is disposed between the first channel and the second channel.

[0011] In one embodiment, the liquid cooling plate further has a first outlet and a second outlet, the first outlet being connected to the first flow channel and the second outlet being connected to the second flow channel; The first outlet and the second outlet are located on the same side of the liquid cooling plate and are spaced apart, while the liquid inlet is located on the side of the liquid cooling plate away from the first outlet.

[0012] In one embodiment, the liquid cooling plate includes a plurality of partitions, the partitions connecting the first plate and the second plate, the plurality of partitions being spaced apart, and the first plate, the second plate and the plurality of partitions together forming the liquid inlet channel, the first channel and the second channel.

[0013] In one embodiment, the first flow channel includes a first sub-flow channel and a second sub-flow channel side by side, the separator separates the first sub-flow channel and the second sub-flow channel, the inlet of the first sub-flow channel is connected to the outlet of the liquid inlet flow channel, the inlet of the second sub-flow channel is connected to the outlet of the first sub-flow channel, and the outlet of the second sub-flow channel is connected to the first outlet.

[0014] Secondly, this utility model provides a battery module, including a battery pack and a liquid cooling plate as described in any one of the various embodiments of the first aspect, wherein the liquid cooling plate is attached to the battery pack.

[0015] The liquid cooling plate of this invention is provided with a first flow channel and a second flow channel in different regions. By setting a first protrusion and a second protrusion on the inner wall surface of the first and second flow channels respectively, the flow resistance of the cooling medium in the first and second flow channels is changed. When the first angle is greater than the second angle, the medium in the second flow channel experiences greater resistance than the medium in the first flow channel, resulting in greater flow resistance in the second flow channel. This reduces the flow rate in the second flow channel, allowing the medium in the first flow channel to flow smoothly. At the same time, the heat exchange area between the first flow channel and the medium is increased, the cross-sectional area of ​​the first flow channel is reduced, the medium flow is accelerated, and the heat exchange capacity of the first flow channel is improved. When applied to a battery module, the first flow channel can be set in the top region of the battery module, and the second flow channel can be set in the bottom region of the battery module. This optimizes the flow distribution of each branch inside the liquid cooling plate, making the flow rate in each region of the liquid cooling plate more consistent, improving the uniformity of the overall temperature of the liquid cooling plate, and reducing the temperature difference between the top and bottom of the battery module. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a perspective view of a battery module according to one embodiment; Figure 2 This is a perspective view of a liquid cooling plate according to one embodiment; Figure 3 This is a cross-sectional view of a liquid cooling plate according to one embodiment; Figure 4 This is a cross-sectional view of a liquid cooling plate according to another embodiment; Figure 5 This is a cross-sectional view of a liquid cooling plate according to another embodiment.

[0018] Explanation of reference numerals in the attached figures: 100-Battery module, 10-Liquid cooling plate, 111-Liquid inlet, 112-First outlet, 113-Second outlet, 12-First flow channel, 121-First sub-flow channel, 122-Second sub-flow channel, 13-Second flow channel, 14-First protrusion, 141-First blocking surface, 142-First groove, 15-Second protrusion, 151-Second blocking surface, 152-Second groove, 161-First plate, 162-Second plate, 163-Separator, 17-Liquid inlet flow channel, 20-Battery pack, 21-Cell, 30-End plate, 40-Fastening band, Z-First direction, X-Second direction, Y-Third direction. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or it can be in a middle component. When a component is said to be "connected" to another component, it can be directly connected to the other component or it may be in a middle component.

[0021] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this invention includes any and all combinations of one or more of the associated listed items.

[0022] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0023] Please refer to Figure 1 This utility model provides a battery module 100, including a battery pack 20 and a liquid cooling plate 10, wherein the liquid cooling plate 10 is attached to the battery pack 20.

[0024] Optionally, the first direction Z is the height direction of the battery module 100, the second direction X is the length direction of the battery module 100, and the third direction Y is the thickness direction of the battery module 100.

[0025] Optionally, the battery pack 20 includes a plurality of cells 21, which are arranged sequentially in the second direction X and electrically connected. Each cell 21 is a cuboid.

[0026] Optionally, there are two liquid cooling plates 10, which are disposed on both sides of the battery pack 20 in the third direction Y.

[0027] Optionally, the battery module 100 also includes end plates 30 and fastening straps 40. The end plates 30 are disposed at both ends of the battery pack 20 in the second direction X, and the fastening straps 40 are sleeved on the outer peripheral surfaces of the end plates 30 and the liquid cooling plate 10. The end plates 30 are made of materials with high structural strength, specifically metal materials, high-strength plastics, ceramics, etc. Metal materials include aluminum, aluminum alloys, magnesium alloys, iron, and iron alloys. The cable straps can be PET plastic steel straps, steel straps (including stainless steel straps), PA66 nylon cable straps, etc., without limitation.

[0028] Please refer to Figures 2 to 5 This utility model provides a liquid cooling plate 10, having a liquid inlet 111 and a first flow channel 12 and a second flow channel 13 spaced apart. The inlets of the first flow channel 12 and the second flow channel 13 are both connected to the liquid inlet 111. A first protrusion 14 is provided on the inner wall of the first flow channel 12, and the first protrusion 14 has a first blocking surface 141 opposite to the flow direction of the medium in the first flow channel 12. A second protrusion 15 is provided on the inner wall of the second flow channel 13, and the second protrusion 15 has a second blocking surface 151 opposite to the flow direction of the medium in the second flow channel 13. Please refer to [reference needed]. Figure 3 The first blocking surface 141 and the flow direction of the medium in the first flow channel 12 have a first included angle α. Please refer to [reference needed]. Figure 4 The second obstruction surface 151 and the flow direction of the medium in the second flow channel 13 have a second included angle b, satisfying: a > b. Figure 3 and Figure 4 The dashed lines in the diagram indicate the direction of medium flow.

[0029] Optionally, the liquid cooling plate 10 can be made of a material with high thermal conductivity, such as aluminum and aluminum alloys, copper, aluminum-based composite materials, copper-aluminum composite materials, etc., without limitation.

[0030] Optionally, the inner wall surfaces of the first protrusion 14 and the first flow channel 12 can be an integral structure, that is, the inner wall surfaces of the first protrusion 14 and the first flow channel 12 are an integral structure manufactured by an integral molding process. The integral molding process can be stamping, casting, etc., without limitation. The inner wall surfaces of the first protrusion 14 and the first flow channel 12 can also be a separate structure, and the inner wall surfaces of the first protrusion 14 and the first flow channel 12 can be connected and fixed by welding, bonding, snap-fitting, screwing, etc.

[0031] Optionally, the first blocking surface 141 forms angles with the first direction Z, the second direction X, and the third direction Y. Similarly, the second blocking surface 151 forms angles with the first direction Z, the second direction X, and the third direction Y.

[0032] Optionally, the first protrusion 14 also has a first inclined surface parallel to the first blocking surface 141. The second protrusion 15 also has a second inclined surface parallel to the second blocking surface 151.

[0033] Optionally, the cross-sectional shape of the orthographic projection of the first protrusion 14 and the second protrusion 15 in the first direction Z can be a rectangle, a parallelogram, a triangle, etc., without restriction.

[0034] Optionally, when the liquid cooling plate 10 is attached to the battery pack 20, the first protrusion 14 and the first flow channel 12 are located on the top of the battery module 100, and the second protrusion 15 and the second flow channel 13 are located on the bottom of the battery module 100.

[0035] Optionally, the first flow channel 12 and the second flow channel 13 are disposed on both sides of the liquid inlet 111 in the first direction Z. The liquid inlet 111 can be directly connected to the first flow channel 12 and the second flow channel 13, or it can be indirectly connected to the first flow channel 12 and the second flow channel 13.

[0036] Optionally, the first blocking surface 141 and the second blocking surface 151 can be flat, curved, wavy, honeycomb, etc., without limitation.

[0037] The liquid cooling plate 10 of this invention is provided with a first flow channel 12 and a second flow channel 13 in different regions. By providing a first protrusion 14 and a second protrusion 15 on the inner wall surfaces of the first flow channel 12 and the second flow channel 13 respectively, the flow resistance of the cooling medium in the first flow channel 12 and the second flow channel 13 is changed. When the first included angle is greater than the second included angle, the medium in the second flow channel 13 experiences greater resistance than the medium in the first flow channel 12. The greater flow resistance of the second flow channel 13 reduces the flow rate of the second flow channel 13, while the medium in the first flow channel 12 flows smoothly. At the same time, the heat exchange area between the first flow channel 12 and the medium is increased, the cross-sectional area of ​​the first flow channel 12 is reduced, the medium flow is accelerated, and the heat exchange capacity of the first flow channel 12 is improved. When applied to the battery module 100, the first flow channel 12 can be set in the top area of ​​the battery module 100, and the second flow channel 13 can be set in the bottom area of ​​the battery module 100. This optimizes the flow distribution of each branch inside the liquid cooling plate 10, making the flow in each area of ​​the liquid cooling plate 10 more consistent, improving the uniformity of the temperature of the entire liquid cooling plate 10, and reducing the temperature difference between the top and bottom of the battery module 100.

[0038] Please refer to Figure 3 and Figure 4 In one embodiment, 30°<a≤150°, 30°≤b<150°.

[0039] Optionally, 'a' can be 35°, 45°, 55°, 60°, 70°, 80°, 90°, 100°, 110°, 120°, 130°, 140°, 150°, etc., without restriction.

[0040] Optionally, b can be 30°, 40°, 50°, 60°, 70°, 80°, 90°, 100°, 110°, 120°, 130°, 140°, 145°, etc., without restriction.

[0041] Optionally, when the first included angle a is greater than 90°, the first blocking surface 141 faces the flow direction of the medium in the first flow channel 12; when the second included angle b is less than 90°, the second blocking surface 151 faces away from the flow direction of the medium in the second flow channel 13.

[0042] When the first and second angles are too small, the small angle between the first protrusion 14 and the second protrusion 15 and the inner wall of the flow channel will result in a narrow flow channel, excessive obstruction of coolant flow, and the formation of local high-velocity areas. However, the overall heat exchange area of ​​the flow channel will not be fully utilized, leading to low heat dissipation efficiency. Furthermore, the narrow flow channel will increase the flow resistance of the cooling medium, resulting in a significant increase in inlet and outlet pressure drop, requiring higher pumping power to maintain the flow rate and increasing system energy consumption. When the first and second angles are too large, the flow channel formed by the first and second angles and the inner wall of the flow channel will be too wide, and the coolant flow will tend to be narrow. Stable flow can lead to a thicker boundary layer and a lower heat transfer coefficient. It may also cause stress concentration at the roots of the first protrusion 14 and the second protrusion 15, reducing structural strength. In particular, it can easily deform or break under high pressure or vibration conditions. When the first and second included angles are moderate, the flow channel width and turbulence effect can be balanced, so that the cooling medium forms moderate turbulence in the first flow channel 12 and the second flow channel 13, which can destroy the boundary layer and improve the heat transfer coefficient. This can avoid the first flow channel 12 and the second flow channel 13 being too narrow or too wide, reduce the flow resistance of the coolant, thereby reducing pumping energy consumption and improving system energy efficiency.

[0043] Please refer to Figure 3 In one embodiment, the height of the first protrusion 14 protruding from the inner wall of the first flow channel 12 is d1, and the height of the first flow channel 12 is d2, satisfying: 0.25≤d1 / d2≤0.75.

[0044] Optionally, d1 / d2 can be 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, etc., without restriction.

[0045] Optionally, the height of the second protrusion 15 protruding from the inner wall of the second flow channel 13 may be the same as or different from the height of the first protrusion 14 protruding from the inner wall of the first flow channel 12, without limitation. The heights of the first flow channel 12 and the second flow channel 13 may be the same or different, without limitation.

[0046] If d1 / d2 is too small, it will limit the heat exchange area, resulting in insufficient heat dissipation capacity. The contact time between the cooling medium and the first protrusion 14 will be shortened, and local heat cannot be transferred in time, resulting in uneven temperature distribution on the surface of the liquid cooling plate 10 and affecting the working stability of the battery module 100. If d1 / d2 is too large, the height of the first protrusion 14 may be too large, which may narrow the first flow channel 12, obstruct the flow of the cooling medium, reduce the local flow velocity, and weaken the heat dissipation effect. When d1 / d2 is moderate, the heat exchange area and boundary layer control can be taken into account, so that the heat transfer coefficient and pressure drop can reach the best balance, ensuring that the cooling medium can fully exchange heat in the first flow channel 12 and reduce local temperature difference.

[0047] Please refer to Figure 2 In one embodiment, there are multiple first protrusions 14, and the multiple first protrusions 14 are spaced apart along the flow direction of the medium in the first flow channel 12.

[0048] Correspondingly, there are multiple second protrusions 15, which are spaced apart along the flow direction of the medium in the second flow channel 13.

[0049] Optionally, the first protrusion 14 and the second protrusion 15 are arranged in an array in the first direction Z and the second direction X.

[0050] Optionally, the arrangement of the first protrusion 14 and the second protrusion 15 can be the same or different, without restriction.

[0051] Multiple first protrusions 14 are arranged at intervals along the flow direction, which can force the cooling medium to form periodic disturbances in the first flow channel 12. When the medium flows through the first protrusions 14, the streamlines are bent, generating vortices and secondary flows, which destroy the thermal boundary layer and thus enhance convective heat transfer.

[0052] Please refer to Figures 2 to 4 In one embodiment, a first groove 142 is provided on the outer surface of the liquid cooling plate 10, and the first groove 142 extends into the first protrusion 14.

[0053] Optionally, the first blocking surface 141 is parallel to the side wall surface of the first groove 142.

[0054] Optionally, the cross-sectional shape of the first groove 142 can be a parallelogram, V-shape, U-shape, rectangle, etc., without limitation. The forming process of the first groove 142 can be stamping, blow molding, etc., without limitation.

[0055] Optionally, a second groove 152 is provided on the outer surface of the liquid cooling plate 10, and the second groove 152 extends into the second protrusion 15.

[0056] By creating a first groove 142 on the liquid cooling plate 10, the amount of material used can be reduced while ensuring the strength and effect of the first protrusion 14, thus reducing weight and cost and contributing to the lightweight design of the liquid cooling plate 10.

[0057] Please refer to Figure 3 and Figure 5 In one embodiment, the liquid cooling plate 10 includes a first plate 161 and a second plate 162 disposed opposite to each other, the first plate 161 and the second plate 162 enclosing to form a first flow channel 12 and a second flow channel 13; The first protrusion 14 is disposed on the surface of the first plate 161 facing the second plate 162, and / or the first protrusion 14 is disposed on the surface of the second plate 162 facing the first plate 161; The second protrusion 15 is disposed on the surface of the first plate 161 facing the second plate 162, and / or the second protrusion 15 is disposed on the surface of the second plate 162 facing the first plate 161.

[0058] Optionally, the connection method of the first plate 161 and the second plate 162 can be bonding, welding, screwing, snap-fitting, etc., without limitation. Optionally, the liquid cooling plate 10 also includes a side plate, which is disposed between the first plate 161 and the second plate 162 for connecting the first plate 161 and the second plate 162.

[0059] When the first protrusion 14 and / or the second protrusion 15 are distributed on the surfaces of the two plates, the coolant will be disturbed by the protrusions on both the upper and lower sides as it flows through the first flow channel 12 and the second flow channel 13. This bidirectional disturbance can destroy the laminar boundary layer, promote turbulence formation, thereby enhancing fluid mixing and reducing local hot spots. By adjusting the height, spacing or shape of the first protrusion 14 and the second protrusion 15 on the first plate 161 and the second plate 162, the flow distribution of the first flow channel 12 and the second flow channel 13 can be controlled independently. When the liquid cooling plate 10 is under pressure or vibration, the first protrusion 14 and the second protrusion 15 arranged on multiple sides can disperse stress and improve the overall rigidity of the liquid cooling plate 10.

[0060] When the first protrusion 14 and the second protrusion 15 are only provided on the surface of the first plate 161, and the second plate 162 is in close contact with the battery pack 20, the contact area between the second plate 162 and the battery cell 21 of the battery pack 20 is increased, thereby ensuring that the liquid cooling plate 10 and the battery pack 20 have good and stable overall heat exchange capability.

[0061] Please refer to Figure 5 In one embodiment, the liquid cooling plate 10 further has a liquid inlet channel 17, one end of which is connected to the liquid inlet 111, and the other end of which is connected to both the first channel 12 and the second channel 13. The liquid inlet channel 17 is disposed between the first channel 12 and the second channel 13.

[0062] Optionally, the liquid inlet channel 17 extends along the second direction X, and the first channel 12 and the second channel 13 are symmetrically distributed on both sides of the liquid inlet channel 17.

[0063] The inlet channel 17 is directly connected to the first channel 12 and the second channel 13 on both sides, which reduces the tortuous flow of coolant in the liquid cooling plate 10 and reduces friction resistance. The symmetrical flow splitting design allows the coolant to smoothly transition from the end of the inlet channel 17 to the first channel 12 and the second channel 13 on both sides, avoiding turbulence losses caused by sudden fluid turning or contraction / expansion.

[0064] Please refer to Figure 2 and Figure 5 In one embodiment, the liquid cooling plate 10 further has a first outlet 112 and a second outlet 113. The first outlet 112 is connected to the first flow channel 12, and the second outlet 113 is connected to the second flow channel 13. The first outlet 112 and the second outlet 113 are located on the same side of the liquid cooling plate 10 and are spaced apart. The liquid inlet 111 is located on the side of the liquid cooling plate 10 away from the first outlet 112.

[0065] Optionally, the first outlet 112 and the second outlet 113 are disposed at both ends of the liquid cooling plate 10 in the first direction Z, and the first outlet 112 corresponds to the top of the battery module 100 and the second outlet 113 corresponds to the bottom of the battery module 100.

[0066] Optionally, the first outlet 112 and the second outlet 113 are disposed on one side of the liquid cooling plate 10 in the second direction X, and the liquid inlet 111 is disposed on the other side of the liquid cooling plate 10 in the second direction X.

[0067] The layout of the inlet and outlet on opposite sides forces the cooling medium to turn multiple times within the liquid cooling plate 10, enhancing the turbulence intensity, accelerating the renewal of the thermal boundary layer, and also enabling the liquid cooling plate 10 to form a "frame" structure. The liquid inlet 111, the first outlet 112, and the second outlet 113 are located at different edges, which can disperse the fluid impact force and thermal stress.

[0068] Please refer to Figure 5 In one embodiment, the liquid cooling plate 10 includes a plurality of partitions 163, which connect the first plate 161 and the second plate 162. The plurality of partitions 163 are spaced apart, and the first plate 161, the second plate 162 and the plurality of partitions 163 together enclose to form a liquid inlet channel 17, a first channel 12 and a second channel 13.

[0069] Optionally, the separator 163 can be made of a material with high structural strength, such as metal, high-strength plastic, or ceramic. Metal materials include aluminum, aluminum alloys, magnesium alloys, iron, and iron alloys. The separator 163 and the second plate 162 can be a single-piece structure, meaning they are manufactured using a single molding process, such as stamping or casting, without limitation. Alternatively, the separator 163 and the second plate 162 can be separate structures, connected and fixed by welding, bonding, snap-fitting, screwing, or other methods.

[0070] Optionally, the separator 163 extends along the second direction X. One end of the separator 163 is connected to one side plate of the liquid cooling plate 10 in the second direction X, and the other end of the separator 163 is spaced apart from another side plate of the liquid cooling plate 10 in the second direction X.

[0071] The liquid inlet channel 17, the first channel 12 and the second channel 13 formed by the separator 163 increase the contact area and heat exchange time between the cooling medium and the liquid cooling plate 10. As an internal support structure, the separator 163 can also enhance the vibration resistance and impact resistance of the liquid cooling plate 10.

[0072] Please refer to Figure 5 In one embodiment, the first flow channel 12 includes a first sub-flow channel 121 and a second sub-flow channel 122 arranged side by side. A separator 163 separates the first sub-flow channel 121 and the second sub-flow channel 122. The inlet of the first sub-flow channel 121 is connected to the outlet of the liquid inlet flow channel 17, the inlet of the second sub-flow channel 122 is connected to the outlet of the first sub-flow channel 121, and the outlet of the second sub-flow channel 122 is connected to the first outlet 112.

[0073] Optionally, the first flow channel 12 may also include a third sub-flow channel, which connects the first sub-flow channel 121 and the second sub-flow channel 122.

[0074] Optionally, the first sub-channel 121 can be directly connected to the second sub-channel 122, or it can be indirectly connected to the second sub-channel 122 through the third sub-channel.

[0075] Specifically, when the first flow channel 12 includes only the first sub-flow channel 121 and the second sub-flow channel 122, the angle between the first protrusion 14 corresponding to the first sub-flow channel 121 and the first protrusion 14 corresponding to the second sub-flow channel 122 and the flow direction of the medium in the first flow channel 12 can be the same or different, without restriction.

[0076] The first sub-channel 121 and the second sub-channel 122 are set up so that the first channel 12 extends in a serpentine shape. The meandering path significantly extends the flow distance of the coolant in the liquid cooling plate 10. The serpentine channel, through continuous turning design, makes the cooling medium form a "circulating flow" in the liquid cooling plate 10, avoiding the end flow velocity attenuation and temperature gradient caused by unidirectional flow.

[0077] In the description of the embodiments of this utility model, it should be noted that the orientation or positional relationship of the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other indicators are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.

[0078] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the present utility model.

Claims

1. A liquid-cooled plate, characterized in that, The device has an inlet and a first flow channel and a second flow channel spaced apart, wherein the inlet of the first flow channel and the inlet of the second flow channel are both connected to the inlet. A first protrusion is provided on the inner wall surface of the first flow channel, and the first protrusion has a first blocking surface opposite to the flow direction of the medium in the first flow channel. A second protrusion is provided on the inner wall surface of the second flow channel, and the second protrusion has a second blocking surface opposite to the flow direction of the medium in the second flow channel. The first blocking surface and the flow direction of the medium in the first flow channel have a first angle α, and the second blocking surface and the flow direction of the medium in the second flow channel have a second angle β, satisfying that α > β.

2. The liquid cooling plate according to claim 1, characterized in that, 30°<a≤150°, 30°≤b<150°.

3. The liquid cooling plate according to claim 1, characterized in that, The height of the first protrusion protruding from the inner wall of the first flow channel is d1, and the height of the first flow channel is d2, satisfying: 0.25≤d1 / d2≤0.

75.

4. The liquid cooling plate according to claim 1, characterized in that, There are multiple first protrusions, and the multiple first protrusions are spaced apart along the flow direction of the medium in the first flow channel.

5. The liquid cooling plate according to claim 1, characterized in that, The outer surface of the liquid cooling plate is provided with a first groove, which extends into the first protrusion.

6. The liquid-cooled plate according to any one of claims 1 to 5, characterized in that, The liquid cooling plate includes a first plate and a second plate disposed opposite to each other, the first plate and the second plate enclosing to form the first flow channel and the second flow channel; The first protrusion is disposed on the surface of the first plate facing the second plate, and / or the first protrusion is disposed on the surface of the second plate facing the first plate; The second protrusion is disposed on the surface of the first plate facing the second plate, and / or the second protrusion is disposed on the surface of the second plate facing the first plate.

7. The liquid cooling plate according to claim 6, characterized in that, The liquid cooling plate also has a liquid inlet channel, one end of which is connected to the liquid inlet, and the other end of which is connected to both the first channel and the second channel. The liquid inlet channel is located between the first channel and the second channel.

8. The liquid cooling plate according to claim 7, characterized in that, The liquid cooling plate also has a first outlet and a second outlet, the first outlet being connected to the first flow channel and the second outlet being connected to the second flow channel; The first outlet and the second outlet are located on the same side of the liquid cooling plate and are spaced apart, while the liquid inlet is located on the side of the liquid cooling plate away from the first outlet.

9. The liquid cooling plate according to claim 8, characterized in that, The liquid cooling plate includes multiple partitions that connect the first plate and the second plate. The multiple partitions are spaced apart, and the first plate, the second plate, and the multiple partitions together enclose the liquid inlet channel, the first channel, and the second channel.

10. The liquid cooling plate according to claim 9, characterized in that, The first flow channel includes a first sub-flow channel and a second sub-flow channel side by side. The separator separates the first sub-flow channel and the second sub-flow channel. The inlet of the first sub-flow channel is connected to the outlet of the liquid inlet flow channel. The inlet of the second sub-flow channel is connected to the outlet of the first sub-flow channel. The outlet of the second sub-flow channel is connected to the first outlet.

11. A battery module, characterized in that, It includes a battery pack and a liquid cooling plate as described in any one of claims 1 to 10, wherein the liquid cooling plate is attached to the battery pack.

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